JP2003243724A - Light emitting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light emitting apparatus where optical color nonuniformity and optical color dispersion are less than a conventional case and the extraction efficiency of light to outside is high. <P>SOLUTION: The light emitting apparatus 1 is provided with a light emitting device 2 constituted of an LED chip and a mold part 11 where transparent resin formed of translucent resin is made in a cannonball shape. The light emitting device 2 is the LED chip of gallium nitride. A light emitting layer part 21 constituted of a gallium nitride semiconductor is formed on fluorescent glass 3 where the ions of rare earth are doped on fluorophosphate glass, for example, by using a semiconductor process. A reflection layer 23 is formed at the rear face of fluorescent glass 3. Light by light emission from the light emitting layer part 21 is radiated to whole directions but partial light absorbed by fluorescent glass 3 excites fluorescent glass 3 and the light of a wavelength peculiar to the ions is radiated. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting device.

[0002]

2. Description of the Related Art In recent years, gallium nitride-based compound semiconductors (eg, GaN, InGaN, AlGaN, InGaAl) have been used.
As a light emitting element using N, etc., a blue LED chip that emits blue light and an ultraviolet LED chip that emits ultraviolet light have been developed. The light emitted from these LED chips has a characteristic that it has an emission peak of a single wavelength having a narrow opposite value width. On the other hand, these LED chips are expected to be applied to display applications and illumination applications, but white light is often required for display applications and illumination applications. Therefore,
LED chips and LEDs that emit blue light or ultraviolet light
Research and development of light-emitting devices that emit light of a color different from that of the LED chip, including white, by combining with various phosphor powders that emit part of the light emitted from the chip as an excitation source Is being done in. This type of light emitting device has advantages such as small size, light weight, and power saving.
At present, it is widely used as a display light source, a light source as a substitute for a small light bulb, a light source for a liquid crystal panel, and the like.

A light emitting device of the type in which an LED chip and a phosphor powder are combined as described above is disclosed in, for example, Japanese Unexamined Patent Publication No. Hei.
No. 152609 (hereinafter referred to as Conventional Example 1), JP-A-7-99345 (hereinafter referred to as Conventional Example 2), and JP-A-10-242513 (hereinafter referred to as Conventional Example 3).
Etc. are disclosed. The light emitting devices of Conventional Examples 1 to 3 are L
A common feature is that a phosphor powder that is excited by light emitted from the LED chip and emits light is dispersed in a translucent resin (eg, epoxy resin) used as a sealing part or a mold part of the ED chip. is there. In such a light emitting device, a part of the light emitted from the LED chip passes through the transparent resin as it is and is emitted to the outside.
The phosphor powder in the translucent resin is excited by another part of the light emitted from the chip, and the wavelength-converted light is also emitted to the outside. Therefore, for example, white light can be obtained as the combined light of the light emitted from the LED chip and the light emitted from the phosphor powder.

Further, as a light emitting device of a system different from the above-mentioned conventional examples 1 to 3, there is, for example, one disclosed in Japanese Patent Laid-Open No. 11-46015 (hereinafter referred to as conventional example 4). The light emitting device of Conventional Example 4 is characterized in that a non-particulate (layered) fluorescent layer that absorbs a part of light emitted from the LED chip, converts the wavelength, and emits light is provided on the LED chip. is there. Here, the fluorescent layer is formed as a thin film of an inorganic fluorescent substance on the LED chip by a sputtering method.

Further, as a light emitting device of a system different from the conventional examples 1 to 4, JP-A-11-204838 (hereinafter referred to as Conventional Example 5) and JP-A-11-251640 (hereinafter referred to as Conventional Example 6). There is one disclosed in.
In the light emitting devices of Conventional Examples 5 and 6, a phosphor powder that absorbs a part of the light emitted from the LED chip and converts the wavelength to emit light is dispersed in the glass used as the material for the sealing portion of the LED chip. It is characterized by that. Here, the conventional example 5,
In the light emitting device of No. 6, the glass material mixed with the phosphor powder using the liquid metal alkoxide as the starting material is LE
After being applied around the D chip, the glass material is fired to be vitrified.

[0006]

However, the light emitting devices of Conventional Examples 1 to 3 have the following problems. First, epoxy resins and the like are widely used as the translucent resin, but these translucent resins generally have poor weather resistance, and the ultraviolet light emitted from the LED chip and the atmosphere It is deteriorated in a relatively short period of time due to the action of moisture from the components, and the transmittance and the color are deteriorated, which leads to an early decrease in the light output. There is one problem). Second
In addition, it is difficult to disperse the phosphor powder in the light-transmitting resin because it is difficult to secure the uniformity in the light-transmitting resin and to suppress the dispersion of the degree of dispersion between the light-transmitting resins. The problem that the light color unevenness due to the position of and the light color variation between the light emitting devices becomes a problem in practical use (hereinafter referred to as the second problem).
There is. Thirdly, a part of the light emitted from the LED chip passes through the transparent resin and is emitted to the outside, but at this time, scattering loss due to the phosphor powder dispersed in the transparent resin occurs, There is a problem that the efficiency of extracting light emitted from the LED chip to the outside is reduced (hereinafter referred to as the third problem).

On the other hand, in the light emitting device of Conventional Example 4,
The above-mentioned first problem is solved. However, since the fluorescent layer in the light emitting device of Conventional Example 4 is a layer formed by depositing fine powder droplets by using the sputtering method, the second and third problems cannot be solved. Moreover, in the light emitting device of Conventional Example 4, the variation in the thickness of the fluorescent layer has a great influence on the light emitting characteristics, and if the thickness of the fluorescent layer is too thick, the amount of light directly transmitted from the LED chip to the outside becomes too small. On the contrary, if the thickness of the fluorescent layer is too thin,
Since almost no light is emitted from the inorganic phosphor, there is a problem that the yield is low and the cost is high.

Further, in the light emitting devices of the conventional examples 5 and 6, since the phosphor powder is dispersed in the glass which is more weather resistant than the translucent resin, the first problem described above is solved. be able to. However, the second and third problems cannot be solved even in the light emitting devices of the conventional examples 5 and 6.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a light emitting device which has less light color unevenness and light color variation as compared with the prior art and has high efficiency of extracting light to the outside. It is in.

[0010]

According to a first aspect of the present invention, there is provided a light emitting device comprising a light emitting element and a light emitting substance which is excited by light from the light emitting element and emits light having a desired wavelength.
The luminescent material is characterized in that the glass is doped with ions serving as luminescence centers and is made of fluorescent glass having a light-transmitting property in a visible wavelength range, and is also used as a substrate for forming a light-emitting element. , Fluorescent glass is superior in translucency as compared with the conventional one in which phosphor powder is dispersed in translucent resin or glass, and a part of the light emitted from the light emitting element is directly emitted to the outside. At the same time, the other part of the light emitted from the light emitting element excites the ion that is the emission center and emits the light due to the light emission peculiar to the ion to the outside, so the light emitted from the light emitting element and the fluorescent glass It is possible to obtain a combined light with the emitted light, and it is possible to reduce light color unevenness and light color variation as compared with the related art, and it is possible to improve the efficiency of extracting light to the outside. That is, when the phosphor powder is dispersed in a translucent resin or glass as in the conventional case or when the phosphor layer is formed by a sputtering method, it exhibits an optically cloudy or cloudy property, and the degree of cloudiness or It is extremely difficult to maintain the degree of fogging constant, and uneven light colors and light color variations between light emitting devices are likely to occur.
In addition, scattering loss due to the phosphor powder is likely to cause a decrease in extraction efficiency of light emitted from the light emitting element to the outside, but since the fluorescent glass has high transparency without clouding or turbidity, the light color is uniform. The light-emitting device has excellent light-emitting property, there is almost no variation in light color between the light-emitting devices, and the efficiency of extracting light from the light-emitting element to the outside can be increased as compared with the conventional case. Further, since the fluorescent glass is also used as the substrate for forming the light emitting element, some of the light from the light emitting element can efficiently excite the ion serving as the emission center in the fluorescent glass, and the light emission peculiar to the ion. The brightness of light can be increased.

The invention of claim 2 comprises a light emitting element, a sealing portion or a molding portion for sealing the light emitting element, and a light emitting substance which is excited by light from the light emitting element to emit light of a desired wavelength. In the light emitting device, the light emitting material is made of fluorescent glass in which ions serving as luminescence centers are doped in the glass and has a light-transmitting property in a visible wavelength range, and also serves as at least a part of the sealing portion or the molding portion. The fluorescent glass is superior in translucency as compared with the conventional one in which phosphor powder is dispersed in transparent resin or glass, and the light emitted from the light emitting element is excellent. Part of the light is emitted to the outside as it is, and the other part of the light emitted from the light-emitting element excites the ion that serves as the emission center and emits light due to the light emission specific to the ion. Element It is possible to obtain a combined light of the emitted light and the light emitted from the fluorescent glass, and it is possible to reduce uneven light color and uneven light color compared with the conventional one, and to extract light to the outside. Can be increased. That is, when the phosphor powder is dispersed in a translucent resin or glass as in the conventional case or when the phosphor layer is formed by a sputtering method, it exhibits an optically cloudy or cloudy property, and the degree of cloudiness or It is extremely difficult to keep the degree of fogging constant, and uneven light color and light color variations among light emitting devices are likely to occur, and scattering loss due to phosphor powder causes light emitted by the light emitting element. However, since the fluorescent glass has high transparency without clouding or turbidity, it has excellent uniformity of light color, and there is almost no variation in light color between light emitting devices. The efficiency of extracting light to the outside can be increased as compared with the conventional case. Furthermore, since the fluorescent glass is also used as at least a part of the sealing part or the mold part, a part of the light from the light emitting element can efficiently excite the ions serving as the luminescence center in the fluorescent glass. It is possible to increase the brightness of light due to light emission specific to ions.

According to a third aspect of the present invention, there is provided a light emitting element, a sealing portion or a molding portion for sealing the light emitting element, and a light emitting substance which is excited by light from the light emitting element to emit light of a desired wavelength. In the light emitting device, the light emitting material is made of fluorescent glass in which ions serving as an emission center are doped in the glass and has a light-transmitting property in a visible wavelength range, and is close to the outside of the sealing portion or the mold portion. It is characterized in that it is arranged, the fluorescent glass is excellent in translucency as compared with the conventional one in which phosphor powder is dispersed in transparent resin or glass, and is emitted from the light emitting element. A part of the light is emitted to the outside as it is, and the other part of the light emitted from the light emitting element excites the ion serving as the emission center and emits the light due to the emission peculiar to the ion. From the light emitting element It is possible to obtain a combined light of the emitted light and the light emitted from the fluorescent glass, and it is possible to reduce uneven light color and uneven light color compared to the conventional one, and to extract light to the outside. Can be increased. That is, when the phosphor powder is dispersed in a translucent resin or glass as in the conventional case or when the phosphor layer is formed by a sputtering method, it exhibits an optically cloudy or cloudy property, and the degree of cloudiness or It is extremely difficult to keep the degree of fogging constant, and uneven light color and light color variations among light emitting devices are likely to occur, and scattering loss due to phosphor powder causes light emitted by the light emitting element. However, since the fluorescent glass has high transparency without clouding or turbidity, it has excellent uniformity of light color, and there is almost no variation in light color between light emitting devices. The efficiency of extracting light to the outside can be increased as compared with the conventional case. Further, since the fluorescent glass is disposed close to the outside of the sealing part or the mold part, a part of the light from the light emitting element can efficiently excite the ion serving as the emission center in the fluorescent glass. It is possible to increase the brightness of light due to light emission specific to the ion.

According to a fourth aspect of the present invention, there is provided a light emitting device comprising a light emitting element and a light emitting substance which emits light of a desired wavelength when excited by light from the light emitting element. The unit is composed of a module, and the luminescent material is made of fluorescent glass which is doped with ions serving as an emission center in the glass and has a light-transmitting property in a visible wavelength range, and is disposed in the vicinity of at least a part of the module. The fluorescent glass is superior in translucency as compared with the conventional one in which phosphor powder is dispersed in transparent resin or glass, and the light emitted from the light emitting element is A part of the light is emitted to the outside as it is, and the other part of the light emitted from the light emitting element excites the ion serving as the emission center, and the light emitted by the light peculiar to the ion is emitted to the outside. From It is possible to obtain a combined light of the emitted light and the light emitted from the fluorescent glass, and it is possible to reduce uneven light color and uneven light color compared to the conventional one, and to extract light to the outside. Can be increased. That is, when the phosphor powder is dispersed in a translucent resin or glass as in the conventional case or when the phosphor layer is formed by a sputtering method, it exhibits an optically cloudy or cloudy property, and the degree of cloudiness or It is extremely difficult to keep the degree of fogging constant, and uneven light color and light color variations among light emitting devices are likely to occur, and scattering loss due to phosphor powder causes light emitted by the light emitting element. However, since the fluorescent glass has high transparency without clouding or turbidity, it has excellent uniformity of light color, and there is almost no variation in light color between light emitting devices. The efficiency of extracting light to the outside can be increased as compared with the conventional case. Further, since the fluorescent glass is disposed in the vicinity of at least a part of the module, it is possible to efficiently excite the ions serving as the luminescence center in the fluorescent glass by a part of the light from the light emitting element,
It is possible to increase the brightness of light due to light emission specific to the ion.

According to a fifth aspect of the present invention, in the second to fourth aspects of the present invention, the luminescent material is formed by processing fluorescent glass into a desired shape. It can be handled as a processed part made of glass.

According to a sixth aspect of the present invention, in the second to fourth aspects of the present invention, the luminescent substance is solidified into a desired shape by a sol-gel method. It becomes possible to form a desired shape by the method.

According to a seventh aspect of the present invention, in the second to fourth aspects of the invention, the fluorescent glass is formed into a spherical shape having a diameter larger than a visible wavelength, and is dispersed in a transparent resin or glass. Therefore, it is possible to reduce the amount of material used for the fluorescent glass while maintaining the transparency of the fluorescent glass in the visible wavelength range.

According to an eighth aspect of the present invention, in the first to seventh aspects of the present invention, since the phosphor powder that is excited by the light from the light emitting element and emits light is included, the light emitted from the light emitting element and the A light output is obtained which is a composite light of the light emitted from the fluorescent glass and the light emitted from the phosphor powder.

According to a ninth aspect of the invention, in the invention of the eighth aspect, since the emission color of the phosphor powder is aligned with the emission color of the light emitting substance, the emission of the phosphor powder is superimposed on the emission of the light emitting substance. Therefore, the light output can be increased and the light emission efficiency can be improved.

According to a tenth aspect of the invention, in the invention of the eighth aspect, the emission color of the phosphor powder is different from the emission color of the light emitting substance, and therefore, the light emitting element and the fluorescent glass alone can be obtained. It is possible to obtain no light color characteristic.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION (Basic Concept) First, a basic concept common to the embodiments described below will be described with reference to FIG.

As shown in FIG. 47, the light emitting device 1 of each embodiment has a light emitting element 2 composed of an LED chip, a light emitting element 2 disposed in the vicinity of the light emitting element 2, excited by light from the light emitting element 2, and having a desired wavelength. And a fluorescent glass 3 which is a light emitting substance which emits the above light.

The light emitting element 2 is composed of, for example, an LED chip that emits blue light or ultraviolet light, but it may be an LED chip of other emission colors. The fluorescent glass 3 is obtained by doping the glass with ions serving as luminescence centers (hereinafter referred to as luminescent ions), and is commercialized, for example, by Sumita Optical Glass Co., Ltd. under the trade name of “lumirus”. Similar to general glass products, the fluorescent glass 3 has a very high transparency (translucency in the visible wavelength range) and no turbidity or cloudiness is observed, but it is irradiated with ultraviolet light, for example. And emits strong luminescence peculiar to the above luminescent ions. As the emission color of the fluorescent glass 3, not only the three primary colors of red (R), green (G), and blue (B) but also white such as a fluorescent lamp and yellow such as a light bulb are possible. In short, the fluorescent glass 3 has a wavelength conversion function of emitting light having a desired wavelength different from the excitation light by appropriately selecting the luminescent ions to be doped in the glass.

In the light emitting device 1 described above, a part 4a of the light emitted from the light emitting element 2 passes through the fluorescent glass 3 as it is and is emitted to the outside of the light emitting device 1. In addition, the light emitting device 1
Then, another part 4b of the light emitted from the light emitting element 2 is absorbed by the fluorescent glass 3 to excite the fluorescent glass 3, and the light 5 having a wavelength peculiar to the luminescent ions doped in the fluorescent glass 3 is emitted from the light emitting device 1. Is emitted to the outside of.

Therefore, the light emitting device 1 emits the combined light 6 of the light 4a emitted by the light emitting element 2 and transmitted through the fluorescent glass 3 and the light 5 emitted by the fluorescent glass 3, and the light emitting element is emitted. The emission color of the light emitting device 1 as a whole is determined by the emission color of 2 and the emission color of the fluorescent glass 3. The light 4 emitted by the light emitting element 2 and transmitted through the fluorescent glass 3
a is not always necessary.

(Embodiment 1) A light emitting device 1 of this embodiment
As shown in FIG. 1A, includes a light emitting element 2 including an LED chip and a mold portion 11 formed by molding a transparent resin including a translucent resin (for example, an epoxy resin) into a bullet shape. The mold portion 11 covers the light emitting element 2,
The light emitting element 2 is a lead terminal 1 made of a conductive material.
2 and 13 are electrically connected. Lead terminal 12,
13 is formed of a lead frame.

The light emitting element 2 is a gallium nitride LED chip, and an n-type semiconductor layer (not shown) is formed on the lower surface side and a p-type semiconductor layer (not shown) is formed on the upper surface side in FIG. Since the light output is taken out from the p-type semiconductor layer side, the upper side of FIG. 1 will be described as the front side. The rear surface of the light emitting element 2 is bonded to the mirror (cup portion) 14 attached to the front end portion of the lead terminal 13 by die bonding. In addition, the light emitting element 2 includes the above-mentioned p-type semiconductor layer and n.
Conductive wire (eg, gold wire) on each semiconductor layer
15 and 15 are connected by bonding, and the light emitting element 2 and the lead terminal 12 are connected through the conductive wires 15 and 15.
13 is electrically connected. The conductive wire 1
5 and 15 have a small cross-sectional area so as not to interfere with the light emitted from the light emitting element 2.

The mirror 14 has a function of reflecting the light emitted from the side surface and the rear surface of the light emitting element 2 to the front,
The light emitted from the chip and the light reflected forward by the mirror 14 serve as the mold portion 11 that functions as a lens.
The light is radiated forward from the mold portion 11 through the front end portion of the. The mold part 11 includes a mirror 14, a conductive wire 15,
15, the light emitting element 2 is covered with part of the lead terminals 12 and 13, and deterioration of the characteristics due to the reaction of the light emitting element 2 with moisture in the atmosphere is prevented. The rear end portions of the lead terminals 12 and 13 respectively project outward from the rear surface of the mold portion 11.

By the way, as shown in FIG. 1B, the light emitting element 2 includes a light emitting layer portion 21 made of a gallium nitride based semiconductor.
Is formed by utilizing a semiconductor process on the fluorescent glass 3 obtained by doping a glass such as a fluorophosphate glass with rare earth luminescent ions, and a reflective layer 23 is formed on the rear surface of the fluorescent glass 3. . The light emitted from the light emitting layer portion 21 is radiated in all directions, but a part of the light absorbed by the fluorescent glass 3 excites the fluorescent glass 3 and emits light having a wavelength peculiar to the light emitting ions. The light emitted from the fluorescent glass 3 is reflected by the reflective layer 3 and radiated forward. Therefore, the light emitting device 1 can obtain the combined light of the light emitted from the light emitting layer portion 21 and the light emitted from the fluorescent glass 3.

Therefore, the light emitting device 1 of the present embodiment comprises the light emitting element 2 and the light emitting substance which is excited by the light from the light emitting element 2 and emits the light of the desired wavelength. The fluorescent glass 3 is doped with luminescent ions as the luminescent center and has a light-transmitting property in the visible wavelength range. The fluorescent glass 3 has a conventional structure in which a phosphor powder is dispersed in a light-transmitting resin or glass. The light-transmitting property is superior to that of the light-emitting device, and a part of the light emitted from the light-emitting element 2 is directly emitted to the outside, and the other part of the light emitted from the light-emitting element 2 serves as an emission center. Since the light-emitting ions are excited and the light due to the light emission specific to the light-emitting ions is emitted to the outside, it is possible to obtain a combined light of the light emitted from the light-emitting element 2 and the light emitted from the light-emitting ions of the fluorescent glass 3. Yes, and in the past Base and it is possible to reduce the light color unevenness and light color variations, it is possible to increase the efficiency of light extraction to the outside. That is, when the phosphor powder is dispersed in a translucent resin or glass as in the prior art or when the phosphor layer is formed by a sputtering method, it exhibits an optically cloudy or cloudy property, and the degree of cloudiness or It is extremely difficult to keep the degree of fogging constant, unevenness in light color and variation in light color between light emitting devices are likely to occur, and scattering loss due to phosphor powder causes light emitted by the light emitting element 2. It is easy to cause a drop in the efficiency of taking out the water to the outside. On the other hand, the fluorescent glass 3 is
Since it has no cloudiness or turbidity and has high transparency, the light color is excellent in uniformity, there is almost no light color variation among the light emitting devices 1, and the light extraction efficiency of the light emitting element 2 to the outside can be improved as compared with the conventional case. it can. In addition, since the fluorescent glass 3 is used as a light emitting substance that is excited by the light from the light emitting element 2 and emits light of a desired wavelength, compared to the conventional case where phosphor powder is used as the light emitting substance. As a result, the weather resistance of the light emitting material can be enhanced, and the life of the light emitting device 1 can be extended as compared with the conventional case.

Further, in the light emitting device 1 of this embodiment, since the fluorescent glass 3 is also used as the substrate forming the light emitting element 2, a part of the light from the light emitting element 2 becomes an emission center in the fluorescent glass. The luminescent ions can be efficiently excited, and the brightness of light due to the luminescence peculiar to the luminescent ions can be increased.

(Second Embodiment) A light emitting device 1 of the present embodiment
As shown in FIG. 2, the light emitting element 2 is surface-mounted on the insulating substrate 16 provided with the printed wiring 17. Here, the light emitting element 2 has the same configuration as that of the first embodiment, in which the light emitting layer portion 21 made of a gallium nitride based semiconductor is formed on the fluorescent glass 3 and the reflective layer 23 is formed on the rear surface of the fluorescent glass 3. ing. In addition, the light emitting element 2 is the light emitting layer portion 2.
One p-type semiconductor layer (not shown) and one n-type semiconductor layer (not shown) are electrically connected to the printed wirings 17, 17 via the conductive wires 15, 15.

Further, a frame-shaped frame member 18 surrounding the light emitting element 2 is fixed on the insulating substrate 16, and the inside of the frame member 18 is filled with a translucent resin such as epoxy resin. 1
9 is provided. The sealing portion 19 seals and protects the light emitting element 2.

Therefore, also in the light emitting device 1 of this embodiment, as in the case of the first embodiment, the light emitting element 2 and the light emitting element 2 are used.
And a luminescent substance that emits light of a desired wavelength by being excited by light from the luminescent substance, and the luminescent substance is a fluorescent glass in which a luminescent ion serving as an emission center is doped into the glass and which has a light-transmitting property in a visible wavelength range. Since 3 is used, the light emitting element 2
It is possible to obtain a combined light of the light from the light and the light from the light emitting ions. In addition, as in the first embodiment, it is possible to reduce light color unevenness and light color variation as compared with the related art, and
The efficiency of extracting light to the outside can be improved, and the life can be extended.

(Embodiment 3) The light emitting device 1 according to the present embodiment has substantially the same basic configuration as that of Embodiment 2 except that the frame member 18 (see FIG. 2) described in Embodiment 2 is not used. As shown in FIG. 3, the shape of the sealing portion 19 is different. The same components as those in the second embodiment are designated by the same reference numerals and the description thereof will be omitted.

The sealing portion 19 in this embodiment is a truncated cone-shaped sealing function portion 19a for sealing the light emitting element 2 and the sealing portion 1.
The lens-shaped lens function portion 19b functions as a lens at the front end portion of the lens 9. put it here,
The sealing portion 19 is formed by solidifying a translucent resin such as an epoxy resin using a molding die or the like.

Therefore, in the light emitting device 1 of this embodiment,
The number of parts can be reduced as compared with the second embodiment,
The size and weight can be reduced. Moreover, the lens function part 19 functioning as a lens is provided in a part of the sealing part 19.
By providing b, it is possible to obtain a light distribution with excellent directivity.

(Embodiment 4) The light emitting device 1 of the present embodiment has substantially the same basic structure as that of Embodiment 2. As shown in FIG. 4, the light emitting element is provided on one surface (the upper surface in FIG. 4) of the insulating substrate 16. The recess 16a for accommodating 2 is provided, and the recess 1
The light emitting element 2 is mounted on the bottom portion of 6a, and a feature is that a sealing portion 19 filled with a translucent resin such as epoxy resin is provided in the recess 16a. Here, the insulating substrate 1
The printed wirings 17, 17 formed in 6 extend to the bottom of the recess 16a and are electrically connected to the light emitting layer portion 21 made of a gallium nitride based semiconductor of the light emitting element 2 through the conductive wires 15, 15. . The same components as those in the second embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
The recessed portion 16 in which the sealing portion 19 is formed on the upper surface of the insulating substrate 16.
Since it is formed by filling a with a transparent resin, the sealing portion 1 does not need to use the frame member 18 (see FIG. 3) described in the second embodiment or the molding die described in the third embodiment.
9 can be formed, and there is an advantage that the sealing process of the light emitting element 2 can be performed more easily than in the second and third embodiments.

(Embodiment 5) The light emitting device 1 of the present embodiment has the same basic structure as that of the embodiment 4, and as shown in FIG. 5, the light emitting element 2 is mounted on an insulating substrate 16 in a so-called Philip chip. There is a feature in that That is, in the light emitting element 2, bumps 24, 24 made of a conductive material are provided on the surface side of each of the p-type semiconductor layer (not shown) and the n-type semiconductor layer (not shown) of the light emitting layer section 21. The light emitting layer portion 21 is face-down electrically connected to the printed wirings 17, 17 of the insulating substrate 16 via the bumps 24, 24. Therefore, the light emitting element 2 in the present embodiment
The light emitting layer portion 21 is disposed on the side closest to the insulating substrate 16, the reflective layer 23 is disposed on the side farthest from the insulating substrate 16, and the fluorescent glass 3 is provided between the light emitting layer portion 21 and the reflective layer 23. Will intervene. The same components as those in the fourth embodiment are designated by the same reference numerals and the description thereof will be omitted.

In the light emitting device 1 of this embodiment, the reflective layer 23
The light reflected downward (backward) in FIG.
It is reflected by the inner peripheral surface of 6a and radiated upward (forward) in the figure. Here, it is desirable to separately provide a reflective layer made of a material having a high reflectance on the inner peripheral surface of the recess 16a and the portion other than the printed wirings 17, 17.

Therefore, in the light emitting device 1 of this embodiment,
Since the conductive wires 15 and 15 as in the fourth embodiment are not required to connect the printed wirings 17 and 17 provided on the insulating substrate 16 to the light emitting element 2, the mechanical strength and reliability are higher than those in the fourth embodiment. It is possible to improve the property.

(Embodiment 6) The light emitting device 1 according to the present embodiment has substantially the same basic structure as that of Embodiment 5, and as shown in FIG. 6, the reflective layer 23 described in Embodiment 5 is not provided. Is different. In short, in the light emitting device 1 of the present embodiment, the light emitted from the light emitting layer portion 21 and the light emitted from the fluorescent glass 3 pass through the sealing portion 19 and are emitted forward as they are. The same components as those in the fifth embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Compared to the fifth embodiment, the number of parts can be reduced and the manufacturing becomes easier.

(Embodiment 7) The light emitting device 1 according to the present embodiment has the same basic structure as that of the first embodiment, and as shown in FIG.
The feature is that the mold portion 11 is formed of fluorescent glass. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In manufacturing the light emitting device 1 of the present embodiment, a work-in-process product having no mold portion 11 is prepared by molding a metal alkoxide (eg, tetra-ethoxy-silane) for forming a fluorescent glass. The mold portion 11 is formed by a so-called sol-gel method in which the metal alkoxide is dipped in the inside and baked and solidified to be vitrified.

In this embodiment, however, the mold part 1
Since 1 is made of fluorescent glass, the weather resistance of the mold portion 11 can be increased and the life can be extended as compared with the case where the mold portion 11 is made of the translucent resin as in the first embodiment. It is possible to plan.

(Embodiment 8) The light emitting device 1 according to the present embodiment has a basic structure which is substantially the same as that of the first embodiment, and as shown in FIG. It is characterized in that the fluorescent glass 3 is attached. That is, in this embodiment, instead of providing the light emitting element 2 with the fluorescent glass 3 as in the first embodiment, the fluorescent glass 3 having a shape along the outer periphery of the mold portion 11 is provided.
The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

The fluorescent glass 3 in the present embodiment may be formed as a thin film by the sol-gel method described in the seventh embodiment, or a member obtained by previously forming a solid fluorescent glass into a cup shape is attached to the mold portion 11. You may do it.

Therefore, in the light emitting device 1 of this embodiment,
Compared with the case where the entire mold part 11 is formed of fluorescent glass as in the light emitting device 1 of the seventh embodiment, the amount of fluorescent glass material used can be reduced and the cost can be reduced.

(Embodiment 9) The basic configuration of the light emitting device 1 of this embodiment is substantially the same as that of the second embodiment, and as shown in FIG. 9, on one surface (upper surface of FIG. 9) side of the insulating substrate 16. A frame-shaped frame member 18 arranged so as to surround the light emitting element 2 is provided, and instead of forming the sealing portion 19 inside the frame member 18 with a translucent resin such as an epoxy resin, the second exemplary embodiment is used. It is characterized in that it is made of fluorescent glass doped with luminescent ions similar to the fluorescent glass 3 described in 1. In addition,
The same components as those in the second embodiment are designated by the same reference numerals and the description thereof will be omitted.

In the present embodiment, however, since the sealing portion 19 is formed of fluorescent glass, the sealing portion 19 is sealed as compared with the case where the sealing portion 19 is formed of the translucent resin as in the second embodiment. The weather resistance of the stopper portion 19 can be enhanced, and the service life can be extended.

(Embodiment 10) The light emitting device 1 of the present embodiment.
The basic configuration of is similar to that of the second embodiment, and as shown in FIG. 10, a frame-shaped frame arranged so as to surround the light emitting element 2 on one surface (the upper surface in FIG. 10) of the insulating substrate 16. Material 1
8 is provided, and instead of forming the sealing portion 19 on the inner side of the frame member 18 with a translucent resin such as an epoxy resin, fluorescence similar to the fluorescent glass 3 described in the second embodiment is doped with luminescent ions. It is characterized in that it is made of glass.
The same components as those in the second embodiment are designated by the same reference numerals and the description thereof will be omitted.

In this embodiment, however, since the sealing portion 19 is made of fluorescent glass, the sealing portion 19 is sealed as compared with the case where the sealing portion 19 is made of a translucent resin as in the second embodiment. The weather resistance of the stop portion 19 can be enhanced, and the service life can be extended.

In this embodiment, the fluorescent glass 3 is formed on the rear surface of the light emitting layer portion 21 of the light emitting element 2,
Since the sealing portion 19 covering the is formed of fluorescent glass, the fluorescent glass exists in all directions of the light emitting layer portion 21 of the light emitting element 2, and excitation and light emission of the fluorescent glass are performed in comparison with the ninth embodiment. There is an advantage that it can be performed more efficiently.

(Embodiment 11) A light emitting device 1 of the present embodiment
The basic configuration of is similar to that of the second embodiment, and as shown in FIG. 10, a fluorescent glass 33 molded in a lens shape in advance is arranged on the upper surface of the sealing portion 19 made of a translucent material such as epoxy resin. The feature is that it is installed. Here, in the fluorescent glass 33, as in the fluorescent glass 3 described in the second embodiment, the glass is doped with luminescent ions. The same components as those in the second embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Since the fluorescent glass 33 has not only the wavelength conversion function but also the function as a lens, it is possible to control the directivity of light emission by the lens effect.

(Embodiment 12) A light emitting device 1 of the present embodiment
The basic configuration of is similar to that of the second embodiment. The feature is that it is installed. Here, in the fluorescent glass 33, as in the fluorescent glass 3 described in the second embodiment, the glass is doped with luminescent ions. The same components as those in the second embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Since the fluorescent glass 33 has not only the wavelength conversion function but also the function as a lens, it is possible to control the directivity of light emission by the lens effect. Further, in this embodiment, since the fluorescent glass 3 is formed on the rear surface of the light emitting layer portion 21 of the light emitting element 2, there is an advantage that the fluorescent glass can be excited and emitted more efficiently than in the eleventh embodiment. is there.

(Embodiment 13) The light emitting device 1 of the present embodiment
The basic configuration of is similar to that of the third embodiment, and as shown in FIG. 13, a sealing portion 19 covering the light emitting element 2 is provided on the upper surface side of the insulating substrate 16, and the sealing portion 19 is made of fluorescent glass. It is characterized in that it is formed. Here, as in the third embodiment, the sealing portion 19 has a truncated cone-shaped sealing function portion 19 a that seals the light emitting element 2 and a lens-shaped lens function that functions as a lens at the front end portion of the sealing portion 19. Part 19b
It consists of and. The same components as those of the third embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
The sealing unit 19 not only has a function of sealing and protecting the light emitting element 2, but also has a wavelength conversion function of converting the wavelength of light from the light emitting element 2.
It has a lens function of controlling the directivity of light emission. Further, weather resistance can be improved and life can be extended as compared with the case where the sealing portion 19 is formed of a translucent resin such as an epoxy resin. Further, in the present embodiment, the fluorescent glass 3 is formed on the rear surface of the light emitting layer portion 21 of the light emitting element 2, and the sealing portion 19 covering the light emitting element 2 is formed of the fluorescent glass, so that the light emitting layer of the light emitting element 2 is formed. Since the fluorescent glass exists in all directions of the portion 21, there is an advantage that the fluorescent glass can be excited and emitted more efficiently than in the twelfth embodiment.

(Embodiment 14) The light emitting device 1 of the present embodiment
14 is substantially the same as that of the third embodiment, and as shown in FIG. 14, the insulating substrate 16 includes a sealing portion 19 that covers the light emitting element 2 on one surface (the upper surface of FIG. 14) side. The feature is that the portion 19 is made of fluorescent glass. Here, as in the third embodiment, the sealing portion 19 has a truncated cone-shaped sealing function portion 19 a that seals the light emitting element 2 and a lens-shaped lens function that functions as a lens at the front end portion of the sealing portion 19. And part 19b. The same components as those of the third embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
The sealing unit 19 not only has a function of sealing and protecting the light emitting element 2, but also has a wavelength conversion function of converting the wavelength of light from the light emitting element 2.
It has a lens function of controlling the directivity of light emission. Further, weather resistance can be improved and life can be extended as compared with the case where the sealing portion 19 is formed of a translucent resin such as an epoxy resin.

(Embodiment 15) The light emitting device 1 of the present embodiment
The basic configuration of is similar to that of the third embodiment, and as shown in FIG. 15, a dome-shaped fluorescent glass 34 covering the light emitting element 2 is disposed on the upper surface side of the insulating substrate 16, and the fluorescent glass 3
4 is characterized in that a sealing portion 19 made of a translucent resin such as an epoxy resin is formed on the outer surface side of 4. here,
Similar to the third embodiment, the sealing portion 19 is composed of a sealing function portion 19a that seals the light emitting element 2 and a lens-shaped lens function portion 19b that functions as a lens at the front end portion of the sealing portion 19. There is. The same components as those of the third embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
The amount of fluorescent glass material used can be reduced as compared with the thirteenth and fourteenth embodiments. Further, in this embodiment, since the dome-shaped fluorescent glass 34 covering the light emitting element 2 is provided, it is possible to more reliably prevent the light emitting element 2 from being deteriorated due to moisture from the outside, and to prolong the life. Can be achieved.

(Embodiment 16) The light emitting device 1 of the present embodiment
The basic configuration of is similar to that of the third embodiment, and as shown in FIG.
4 is characterized in that a sealing portion 19 made of a translucent resin such as an epoxy resin is formed on the outer surface side of 4. here,
Similar to the third embodiment, the sealing portion 19 is composed of a sealing function portion 19a that seals the light emitting element 2 and a lens-shaped lens function portion 19b that functions as a lens at the front end portion of the sealing portion 19. There is. The same components as those of the third embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
The amount of fluorescent glass material used can be reduced as compared with the thirteenth and fourteenth embodiments. Further, in this embodiment, since the dome-shaped fluorescent glass 34 covering the light emitting element 2 is provided, it is possible to more reliably prevent the light emitting element 2 from being deteriorated due to moisture from the outside, and to prolong the life. Can be achieved. In the present embodiment, the light emitting layer portion 2 of the light emitting element 2 is also used.
Since the fluorescent glass 3 is formed on the rear surface of the light emitting element 1 and the sealing portion 19 covering the light emitting element 2 is formed of the fluorescent glass, the fluorescent glass exists in all directions of the light emitting layer portion 21 of the light emitting element 2. Embodiment 15: Excitation of fluorescent glass and emission of light
There is an advantage that it can be performed more efficiently than the above.

(Embodiment 17) The light emitting device 1 of the present embodiment
The basic configuration of is substantially the same as that of the fourth embodiment, and as shown in FIG. 17, one surface of the insulating substrate 16 (upper surface in FIG. 17)
It is characterized in that it is provided with a sealing portion 19 which seals the light emitting element 2 arranged at the bottom of the recessed portion 16a provided in the above, and the sealing portion 19 is made of fluorescent glass. Here, the fluorescent glass is doped with luminescent ions that emit light of a desired wavelength when excited by light from the light emitting element 2 as in the fluorescent glass 3 described in the first embodiment.
The sealing portion 19 may be formed by a sol-gel method, for example. The same components as those in the fourth embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Since the sealing portion 19 is made of fluorescent glass, the weather resistance of the sealing portion 19 can be improved as compared with the case where the sealing portion 19 is made of the translucent resin as in the fourth embodiment. It is possible to extend the life. Further, in the present embodiment, the fluorescent glass 3 is formed on the rear surface of the light emitting layer portion 21 of the light emitting element 2, and the sealing portion 19 covering the light emitting element 2 is formed of the fluorescent glass, so that the light emitting layer of the light emitting element 2 is formed. Since the fluorescent glass exists in all directions of the portion 21, there is an advantage that the fluorescent glass can be excited and emitted more efficiently than in the fifteenth embodiment.

(Embodiment 18) The light emitting device 1 of the present embodiment
The basic configuration of is substantially the same as that of the fourth embodiment, and as shown in FIG. 18, one surface of the insulating substrate 16 (upper surface in FIG. 18).
It is characterized in that it is provided with a sealing portion 19 which seals the light emitting element 2 arranged at the bottom of the recessed portion 16a provided in the above, and the sealing portion 19 is made of fluorescent glass. Here, the fluorescent glass is doped with luminescent ions that emit light of a desired wavelength when excited by light from the light emitting element 2 as in the fluorescent glass 3 described in the first embodiment.
The sealing portion 19 may be formed by a sol-gel method, for example. The same components as those in the fourth embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Since the sealing portion 19 is made of fluorescent glass, the weather resistance of the sealing portion 19 can be improved as compared with the case where the sealing portion 19 is made of the translucent resin as in the fourth embodiment. It is possible to extend the life.

(Embodiment 19) The light emitting device 1 of this embodiment
19 is substantially the same as that of the fourth embodiment, and as shown in FIG. 19, a fluorescent glass 33 formed in advance in a lens shape is arranged on the upper surface (light extraction surface) of the sealing portion 19. There are features. Here, the fluorescent glass 33 is the first embodiment.
Similar to the fluorescent glass 3 described in 1 above, it is doped with luminescent ions that are excited by light from the light emitting element 2 and emit light of a desired wavelength. The same components as those in the fourth embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Since the fluorescent glass 33 has not only the wavelength conversion function but also the function as a lens, it is possible to control the directivity of light emission by the lens effect.

(Embodiment 20) The light emitting device 1 of the present embodiment.
20 is substantially the same as that of the fourth embodiment, and as shown in FIG. 20, a fluorescent glass 33 molded in a lens shape in advance is arranged on the upper surface (light extraction surface) of the sealing portion 19. There are features. Here, the fluorescent glass 33 is the first embodiment.
Similar to the fluorescent glass 3 described in 1 above, it is doped with luminescent ions that are excited by light from the light emitting element 2 and emit light of a desired wavelength. The same components as those in the fourth embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Since the fluorescent glass 33 has not only the wavelength conversion function but also the function as a lens, it is possible to control the directivity of light emission by the lens effect. In the present embodiment, the fluorescent glass 3 is also provided on the rear surface of the light emitting layer portion 21 of the light emitting element 2.
Is provided, there is an advantage that the fluorescent glass is more efficiently excited and emitted as compared with the nineteenth embodiment.

(Embodiment 21) The light emitting device 1 of the present embodiment
21 is substantially the same as that of the fifth embodiment, and as shown in FIG. 21, one surface of the insulating substrate 16 (the upper surface in FIG. 21).
It is characterized in that it is provided with a sealing portion 19 which seals the light emitting element 2 arranged at the bottom of the recessed portion 16a provided in the above, and the sealing portion 19 is made of fluorescent glass. Here, as shown in FIG. 22, the sealing portion 19 has a concave portion 19c for accommodating the light emitting element 2 in a portion corresponding to the light emitting element 2 and having a peripheral shape corresponding to the concave portion 16a in advance. Since the product processed to have the shape is mounted in the recess 16a of the insulating substrate 16 on which the light emitting element 2 is mounted, the sealing process can be simplified. Further, the fluorescent glass forming the sealing portion 19 is doped with luminescent ions that are excited by the light from the light emitting element 2 and emit light of a desired wavelength, similarly to the fluorescent glass 3 described in the first embodiment. In addition,
The same components as those in the fifth embodiment are designated by the same reference numerals and the description thereof will be omitted.

Thus, in the light emitting device 1 of this embodiment,
Since the sealing portion 19 is made of fluorescent glass, the weather resistance of the sealing portion 19 can be enhanced as compared with the case where the sealing portion 19 is made of the translucent resin as in the fifth embodiment. It is possible to extend the life. In addition, in the present embodiment, since the light emitted forward from the light emitting layer portion 21 of the light emitting element 2 is once reflected by the reflective layer 23 toward the inner bottom surface side of the recess 16a, the inner bottom surface of the recess 16a. If a reflection layer is provided on the inner peripheral surface and the inner peripheral surface of the recess 16a, the light is further reflected by the inner bottom surface and the inner peripheral surface and emitted forward, so that the optical path length can be increased and the fluorescent glass efficiently excites the light. The advantage is that light emission can be performed.

(Embodiment 22) The light emitting device 1 of the present embodiment
23 is substantially the same as that of the fifth embodiment, and as shown in FIG. 23, one surface of the insulating substrate 16 (upper surface in FIG. 23).
It is characterized in that it is provided with a sealing portion 19 which seals the light emitting element 2 arranged at the bottom of the recessed portion 16a provided in the above, and the sealing portion 19 is made of fluorescent glass. Here, as shown in FIG. 24, the sealing portion 19 has a recess 19c for accommodating the light emitting element 2 in a portion having an outer peripheral shape corresponding to the recess 16a and corresponding to the light emitting element 2 in advance. Since the product processed to have the shape is mounted in the recess 16a of the insulating substrate 16 on which the light emitting element 2 is mounted, the sealing process can be simplified. Further, the fluorescent glass forming the sealing portion 19 is doped with luminescent ions that are excited by the light from the light emitting element 2 and emit light of a desired wavelength, similarly to the fluorescent glass 3 described in the first embodiment. In addition,
The same components as those in the fifth embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Since the sealing portion 19 is made of fluorescent glass, the weather resistance of the sealing portion 19 can be enhanced as compared with the case where the sealing portion 19 is made of the translucent resin as in the fifth embodiment. It is possible to extend the life.

(Embodiment 23) The light emitting device 1 of the present embodiment
25 is substantially the same as that of the sixth embodiment, and is characterized in that the fluorescent glass 3 processed in advance into a rod shape is arranged on the upper surface of the light emitting element 2 as shown in FIG. Here, a sealing portion 19 made of a translucent resin such as an epoxy resin is formed around the light emitting element 2 and the fluorescent glass 3, and one end surface (the lower end surface in FIG. 25) of the fluorescent glass 3 emits light. The other end face (upper end face in FIG. 25) is exposed so as to be in close contact with the light emitting layer portion 21 of the element 2. The same components as those of the sixth embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Since the fluorescent glass 3 whose one end surface is in close contact with the light emitting layer portion 21 of the light emitting element 2 is formed in a rod shape, the light emitting layer portion 2
The light emitted in 1 can be efficiently taken into the fluorescent glass 3 through the one end face of the fluorescent glass 3, and the light emitted from the fluorescent glass 3 excited by the taken-in light is emitted from the fluorescent glass 3.
It can be efficiently radiated to the outside through the other end surface of the. In this embodiment, the fluorescent glass 3 is formed in a rod shape having a relatively large diameter and only one is used.
As shown in FIG. 6, the fluorescent glass 3 may be formed in a fiber shape having a relatively small diameter and a plurality of fluorescent glasses 3 may be arranged side by side. Further, the cross-sectional shape of the fluorescent glass 3 is not limited to a circular shape, but may be formed in, for example, a quadrangular shape, or may be formed in another shape.

(Embodiment 24) The light emitting device 1 of the present embodiment
27 is substantially the same as that of Embodiment 23, and as shown in FIG. 27, includes a sealing portion 19 provided in the recess 16a of the insulating substrate 16, and the sealing portion 19 is formed of fluorescent glass. There is a feature in that Here, the sealing portion 19 is
As shown in FIG. 28, as shown in FIG. 28, the outer peripheral shape is processed into a shape corresponding to the recess 16a and having a through hole 19c for accommodating the light emitting element 2 in a portion corresponding to the light emitting element 2, Since the light emitting element 2 is mounted in the recess 16a of the insulating substrate 16 mounted thereon, the sealing process can be simplified. Further, the fluorescent glass forming the sealing portion 19 is similar to the fluorescent glass 3 described in the first embodiment in the light emitting element 2.
It is doped with luminescent ions that are excited by the light from the above and emit light of a desired wavelength. The same components as those of the twenty-third embodiment are designated by the same reference numerals, and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Since the sealing portion 19 is also made of fluorescent glass, it is possible to prolong the life and improve the efficiency of light emission. In this embodiment, the fluorescent glass 3 is formed in a rod shape having a relatively large diameter and only one is used, but as shown in FIG. 29, the fluorescent glass 3 is formed in a fiber shape having a relatively small diameter. You may make it arrange | position and arrange several fluorescent glass 3 side by side. Further, the cross-sectional shape of the fluorescent glass 3 is not limited to a circular shape, but may be formed in, for example, a quadrangular shape, or may be formed in another shape.

(Embodiment 25) The light emitting device 1 of the present embodiment
The basic configuration of is similar to that of the second embodiment, and includes a frame member 18 arranged on one surface (upper surface in FIG. 30) side of the insulating substrate 16 as shown in FIG. Two
1 is an AlGaN-based material that emits near-ultraviolet light, and phosphor powder (for example, when excited by near-ultraviolet light is excited by a near-ultraviolet light) in a translucent resin such as an epoxy resin used as the sealing portion 19 inside the frame member 18. It is characterized in that YAG: Ce ³⁺ phosphor powder that emits yellow light is dispersed. In the present embodiment, as the fluorescent glass 3, a fluorophosphate glass (for example, P ₂ O ₅ · AlF ₃ · MgF · CaF ₂ · SrF ₂ · BaC that emits blue light when excited by near-ultraviolet light is emitted).
l ₂ : Eu ²⁺ ) is used. The same components as those in the second embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Since the phosphor powder that is excited by the light from the light emitting element 2 to emit light is dispersed in the sealing portion 19, the light emitted from the light emitting element 2, the light emitted from the fluorescent glass 3 and the phosphor powder are emitted. An optical output composed of combined light with the emitted light is obtained.

Therefore, if a material that emits near-ultraviolet light is selected as the material of the light emitting layer portion 21 of the light emitting element 2, the light emitted from the light emitting element 2 causes the fluorescent glass 3 and the phosphors in the sealing portion 19 to be emitted. Both the powder and the powder are excited, and each emits its own unique light emission, and the combined light is obtained.
In the present embodiment, blue light is emitted from the fluorescent glass 3 and yellow light is emitted from the phosphor powder, and white light different from any emission color can be obtained.

In the existing phosphor powder and fluorescent glass, the materials capable of emitting light are limited, and the desired light color may not be obtained with only one of them. The embodiment is extremely effective. In other words, when the desired light color characteristics cannot be obtained only by the fluorescent glass 3, the desired light color can be obtained by supplementing the fluorescent glass 3 with a phosphor powder having an appropriate light color characteristic. The light emitting device 1 having characteristics can be realized. Further, in the present embodiment, the emission color of the phosphor powder is made different from the emission color of the fluorescent glass 3. However, if the emission color of the phosphor powder is aligned with the emission color of the fluorescent glass 3, The light emission of the phosphor powder is superimposed on the light emission, so that the light output can be increased and the light emission efficiency can be improved. When the fluorescent glass 3 and the phosphor powder have substantially the same emission color, for example, P ₂ O ₅ · Sr that emits red light as the fluorescent glass 3 is used.
When F ₂ · BaF ₂ : Eu ³⁺ is used and Y ₂ O ₂ S: Eu ³⁺ that emits red light is used as the phosphor powder, the efficiency of red light emission can be improved. Of course, the combination of the fluorescent glass 3 and the phosphor powder is an example, and other combinations may be adopted.

(Embodiment 26) The light emitting device 1 of the present embodiment
31 is substantially the same as that of the third embodiment, and as shown in FIG. 31, a sealing portion 19 that seals the light emitting element 2 is provided on one surface (the upper surface of FIG. 31) of the insulating substrate 16, The second light-emitting layer portion 21 is an AlGaN-based material that emits near-ultraviolet light, and phosphor powder (for example, yellow when excited by near-ultraviolet light is yellow in a translucent resin such as an epoxy resin used as the sealing portion 19). It is characterized in that YAG: Ce ³⁺ phosphor powder that emits light is dispersed. In the present embodiment, as the fluorescent glass 3, a fluorophosphate glass (for example, P ₂ O ₅ · AlF ₃ · MgF · CaF ₂ · SrF ₂ · BaC that emits blue light when excited by near-ultraviolet light is emitted).
l ₂ : Eu ²⁺ ) is used. The same components as those of the third embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Similar to the twenty-fifth embodiment, since the phosphor powder that is excited by the light from the light emitting element 2 and emits light is dispersed in the sealing portion 19, the light emitted from the light emitting element 2 and the light emitted from the fluorescent glass 3 are emitted. A light output is obtained which is a composite of the light emitted from the phosphor powder and the light emitted from the phosphor powder. That is, similar to the twenty-fifth embodiment, if a material that emits near-ultraviolet light is selected as the material of the light emitting layer portion 21 of the light emitting element 2, the fluorescent glass 3 and the sealing portion 19 are emitted by the light emitted from the light emitting element 2. Both of the phosphor powder in the inside are excited and each emits a unique light emission,
The combined light will be obtained. Also in this embodiment, the emission color of the phosphor powder is made different from the emission color of the fluorescent glass 3. However, if the emission color of the phosphor powder is aligned with the emission color of the fluorescent glass 3, the fluorescent glass 3 The light emission of the phosphor powder is superimposed on the light emission of, and the light output can be increased, and the light emission efficiency can be increased.

(Embodiment 27) The light emitting device 1 of the present embodiment
32 is substantially the same as that of the fourth embodiment. As shown in FIG. 32, the recess 16a formed in the upper surface of the insulating substrate 16
Is provided with a sealing portion 19 for sealing the light emitting element 2,
The light-emitting layer portion 21 of the light-emitting element 2 is an AlGaN-based material that emits near-ultraviolet light, and phosphor powder (for example, excited by near-ultraviolet light is excited in a translucent resin such as an epoxy resin used as the sealing portion 19). YAG: Ce ³⁺ phosphor powder that emits yellow light is dispersed. Also,
In the present embodiment, as the fluorescent glass 3, a fluorophosphate glass (for example, P ₂ O ₅ , AlF ₃ , MgF, CaF ₂ , SrF ₂ , which is excited by near-ultraviolet light and emits blue light).
BaCl ₂ : Eu ²⁺ ) is used. Note that the fourth embodiment
The same components as those of the above are denoted by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Similar to the twenty-fifth embodiment, since the phosphor powder that is excited by the light from the light emitting element 2 and emits light is dispersed in the sealing portion 19, the light emitted from the light emitting element 2 and the light emitted from the fluorescent glass 3 are emitted. A light output is obtained which is a composite of the light emitted from the phosphor powder and the light emitted from the phosphor powder. That is, similar to the twenty-fifth embodiment, if a material that emits near-ultraviolet light is selected as the material of the light emitting layer portion 21 of the light emitting element 2, the fluorescent glass 3 and the sealing portion 19 are emitted by the light emitted from the light emitting element 2. Both of the phosphor powder in the inside are excited and each emits a unique light emission,
The combined light will be obtained. Also in this embodiment, the emission color of the phosphor powder is made different from the emission color of the fluorescent glass 3. However, if the emission color of the phosphor powder is aligned with the emission color of the fluorescent glass 3, the fluorescent glass 3 The light emission of the phosphor powder is superimposed on the light emission of, and the light output can be increased, and the light emission efficiency can be increased.

(Embodiment 28) The light emitting device 1 of the present embodiment
The basic configuration of is similar to that of the fifth embodiment, and as shown in FIG. 33, one surface of the insulating substrate 16 (upper surface in FIG. 33).
The light emitting layer 2 of the light emitting element 2 has a sealing portion 19 which is filled in the recess 16a formed in the light emitting element 2 and seals the light emitting element 2.
The lGaN-based light emitting device emits near-ultraviolet light, and the sealing portion 1
The phosphor powder (eg, YAG: Ce ³⁺ phosphor powder that is excited by near-ultraviolet light to emit yellow light) is dispersed in a transparent resin such as an epoxy resin used as 9. is there. Further, in this embodiment, the fluorescent glass 3
As a fluorophosphate salt-based glass (e.g., P ₂ emits blue light by being excited by near-ultraviolet light O ₅ · AlF ₃ · Mg
F · CaF ₂ · SrF ₂ · BaCl ₂ : Eu ²⁺ ) is used. The same components as those in the fifth embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Similar to the twenty-fifth embodiment, since the phosphor powder that is excited by the light from the light emitting element 2 and emits light is dispersed in the sealing portion 19, the light emitted from the light emitting element 2 and the light emitted from the fluorescent glass 3 are emitted. A light output is obtained which is a composite of the light emitted from the phosphor powder and the light emitted from the phosphor powder. That is, similar to the twenty-fifth embodiment, if a material that emits near-ultraviolet light is selected as the material of the light emitting layer portion 21 of the light emitting element 2, the fluorescent glass 3 and the sealing portion 19 are emitted by the light emitted from the light emitting element 2. Both of the phosphor powder in the inside are excited and each emits a unique light emission,
The combined light will be obtained. Also in this embodiment, the emission color of the phosphor powder is made different from the emission color of the fluorescent glass 3. However, if the emission color of the phosphor powder is aligned with the emission color of the fluorescent glass 3, the fluorescent glass 3 The light emission of the phosphor powder is superimposed on the light emission of, and the light output can be increased, and the light emission efficiency can be increased.

(Embodiment 29) The light emitting device 1 of the present embodiment
The basic configuration of is similar to that of the sixth embodiment, and as shown in FIG. 34, one surface of the insulating substrate 16 (upper surface in FIG. 34).
The light emitting layer 2 of the light emitting element 2 has a sealing portion 19 which is filled in the recess 16a formed in the light emitting element 2 and seals the light emitting element 2.
The lGaN-based light emitting device emits near-ultraviolet light, and the sealing portion 1
The phosphor powder (eg, YAG: Ce ³⁺ phosphor powder that is excited by near-ultraviolet light to emit yellow light) is dispersed in a transparent resin such as an epoxy resin used as 9. is there. Further, in this embodiment, the fluorescent glass 3
As a fluorophosphate salt-based glass (e.g., P ₂ emits blue light by being excited by near-ultraviolet light O ₅ · AlF ₃ · Mg
F · CaF ₂ · SrF ₂ · BaCl ₂ : Eu ²⁺ ) is used. The same components as those of the sixth embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Similar to the twenty-fifth embodiment, since the phosphor powder that is excited by the light from the light emitting element 2 and emits light is dispersed in the sealing portion 19, the light emitted from the light emitting element 2 and the light emitted from the fluorescent glass 3 are emitted. A light output is obtained which is a composite of the light emitted from the phosphor powder and the light emitted from the phosphor powder. That is, similar to the twenty-fifth embodiment, if a material that emits near-ultraviolet light is selected as the material of the light emitting layer portion 21 of the light emitting element 2, the fluorescent glass 3 and the sealing portion 19 are emitted by the light emitted from the light emitting element 2. Both of the phosphor powder in the inside are excited and each emits a unique light emission,
The combined light will be obtained. Also in this embodiment, the emission color of the phosphor powder is made different from the emission color of the fluorescent glass 3. However, if the emission color of the phosphor powder is aligned with the emission color of the fluorescent glass 3, the fluorescent glass 3 The light emission of the phosphor powder is superimposed on the light emission of, and the light output can be increased, and the light emission efficiency can be increased.

(Embodiment 30) Light emitting device 1 of the present embodiment
The basic configuration of the light emitting element 2 is substantially the same as that of the first embodiment, and as shown in FIG.
The light emitting layer portion 21 of AlGaN-based material emits near-ultraviolet light. It is characterized in that YAG: Ce ³⁺ phosphor powder that emits light is dispersed. In the present embodiment, as the fluorescent glass 3, a fluorophosphate glass (for example, P ₂ O ₅ · AlF ₃ · MgF · CaF ₂ · SrF ₂ · BaC that emits blue light when excited by near-ultraviolet light is emitted).
l ₂ : Eu ²⁺ ) is used. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Similar to the twenty-fifth embodiment, since the phosphor powder that is excited by the light from the light emitting element 2 to emit light is dispersed in the mold portion 11, the light emitted from the light emitting element 2 and the fluorescent glass 3 are used.
An optical output is obtained which is a composite light of the light emitted from the phosphor and the light emitted from the phosphor powder. That is, the twenty-fifth embodiment
Similarly, if a material that emits near-ultraviolet light is selected as the material of the light emitting layer portion 21 of the light emitting element 2, the light emitted from the light emitting element 2 causes the fluorescent glass 3 and the phosphor powder in the mold portion 11 to be separated. Both of them are excited and each emits unique light emission, and the combined light is obtained. Also in this embodiment, the emission color of the phosphor powder is changed to the fluorescent glass 3.
However, if the emission color of the phosphor powder is made to match the emission color of the fluorescent glass 3, the emission of the phosphor powder is superimposed on the emission of the fluorescent glass 3 to increase the light output. Therefore, the luminous efficiency can be improved.

(Embodiment 31) The light emitting device 1 of the present embodiment
The basic configuration of the light emitting element 2 is substantially the same as that of the eighth embodiment, and as shown in FIG.
The light emitting layer portion 21 of AlGaN-based material emits near-ultraviolet light. It is characterized in that YAG: Ce ³⁺ phosphor powder that emits light is dispersed. In the present embodiment, as the fluorescent glass 3, a fluorophosphate glass (for example, P ₂ O ₅ · AlF ₃ · MgF · CaF ₂ · SrF ₂ · BaC that emits blue light when excited by near-ultraviolet light is emitted).
l ₂ : Eu ²⁺ ) is used. The same components as those in the eighth embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Similar to the twenty-fifth embodiment, since the phosphor powder that is excited by the light from the light emitting element 2 to emit light is dispersed in the mold portion 11, the light emitted from the light emitting element 2 and the fluorescent glass 3 are used.
An optical output is obtained which is a composite light of the light emitted from the phosphor and the light emitted from the phosphor powder. That is, the twenty-fifth embodiment
Similarly, if a material that emits near-ultraviolet light is selected as the material of the light emitting layer portion 21 of the light emitting element 2, the light emitted from the light emitting element 2 causes the fluorescent glass 3 and the phosphor powder in the mold portion 11 to be separated. Both of them are excited and each emits unique light emission, and the combined light is obtained. Also in this embodiment, the emission color of the phosphor powder is changed to the fluorescent glass 3.
However, if the emission color of the phosphor powder is made to match the emission color of the fluorescent glass 3, the emission of the phosphor powder is superimposed on the emission of the fluorescent glass 3 to increase the light output. Therefore, the luminous efficiency can be improved.

(Embodiment 32) The light emitting device 1 of the present embodiment
37 is substantially the same as that of the eleventh embodiment, and as shown in FIG. 37, includes a sealing portion 19 for sealing the light emitting element 2 on one surface (the upper surface of FIG. 37) of the insulating substrate 16, The second light emitting layer portion 21 is an AlGaN-based material that emits near-ultraviolet light. It is characterized in that YAG: Ce ³⁺ phosphor powder that emits light is dispersed. In the present embodiment, as the fluorescent glass 3, a fluorophosphate glass (for example, P ₂ O ₅ · AlF ₃ · MgF · CaF ₂ · SrF ₂ · BaC that emits blue light when excited by near-ultraviolet light is emitted).
l ₂ : Eu ²⁺ ) is used. The same components as those of the eleventh embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Similar to the twenty-fifth embodiment, since the phosphor powder that is excited by the light from the light emitting element 2 and emits light is dispersed in the sealing portion 19, the light emitted from the light emitting element 2 and the light emitted from the fluorescent glass 3 are emitted. A light output is obtained which is a composite of the light emitted from the phosphor powder and the light emitted from the phosphor powder. That is, similar to the twenty-fifth embodiment, if a material that emits near-ultraviolet light is selected as the material of the light emitting layer portion 21 of the light emitting element 2, the fluorescent glass 3 and the sealing portion 19 are emitted by the light emitted from the light emitting element 2. Both of the phosphor powder in the inside are excited and each emits a unique light emission,
The combined light will be obtained. Also in this embodiment, the emission color of the phosphor powder is made different from the emission color of the fluorescent glass 3. However, if the emission color of the phosphor powder is aligned with the emission color of the fluorescent glass 3, the fluorescent glass 3 The light emission of the phosphor powder is superimposed on the light emission of, and the light output can be increased, and the light emission efficiency can be increased.

(Embodiment 33) The light emitting device 1 of the present embodiment
38 is substantially the same as that of the fifteenth embodiment, and as shown in FIG. 38, includes a sealing portion 19 for sealing the light emitting element 2 on one surface (the upper surface of FIG. 38) of the insulating substrate 16, The second light-emitting layer portion 21 is an AlGaN-based material that emits near-ultraviolet light, and a phosphor powder (for example, excited by near-ultraviolet light to cause yellow light in a transparent resin such as an epoxy resin used as the sealing portion 19 It is characterized in that YAG: Ce ³⁺ phosphor powder that emits light is dispersed. In the present embodiment, as the fluorescent glass 3, a fluorophosphate glass (for example, P ₂ O ₅ · AlF ₃ · MgF · CaF ₂ · SrF ₂ · BaC that emits blue light when excited by near-ultraviolet light is emitted).
l ₂ : Eu ²⁺ ) is used. The same components as those of the fifteenth embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Similar to the twenty-fifth embodiment, since the phosphor powder that is excited by the light from the light emitting element 2 and emits light is dispersed in the sealing portion 19, the light emitted from the light emitting element 2 and the light emitted from the fluorescent glass 3 are emitted. A light output is obtained which is a composite of the light emitted from the phosphor powder and the light emitted from the phosphor powder. That is, similar to the twenty-fifth embodiment, if a material that emits near-ultraviolet light is selected as the material of the light emitting layer portion 21 of the light emitting element 2, the fluorescent glass 3 and the sealing portion 19 are emitted by the light emitted from the light emitting element 2. Both of the phosphor powder in the inside are excited and each emits a unique light emission,
The combined light will be obtained. Also in this embodiment, the emission color of the phosphor powder is made different from the emission color of the fluorescent glass 3. However, if the emission color of the phosphor powder is aligned with the emission color of the fluorescent glass 3, the fluorescent glass 3 The light emission of the phosphor powder is superimposed on the light emission of, and the light output can be increased, and the light emission efficiency can be increased.

(Embodiment 34) The light emitting device 1 of the present embodiment
39 is substantially the same as that of the nineteenth embodiment, and as shown in FIG. 39, the recess 16a formed in one surface (the upper surface in FIG. 39) of the insulating substrate 16 is filled to seal the light emitting element 2. The light emitting layer portion 21 of the light emitting element 2 is provided with the sealing portion 19.
Is an AlGaN-based material that emits near-ultraviolet light, and a phosphor powder (for example, YAG that emits yellow light when excited by near-ultraviolet light: It is characterized in that Ce ³⁺ phosphor powder) is dispersed. Further, in the present embodiment, as the fluorescent glass 3, fluorophosphate salt-based glass (e.g., P ₂ O ₅ · AlF ₃ that emits blue light by being excited by near ultraviolet light,
MgF · CaF ₂ · SrF ₂ · BaCl ₂ : Eu ²⁺ ) is used. The same components as those of the nineteenth embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Similar to the twenty-fifth embodiment, since the phosphor powder that is excited by the light from the light emitting element 2 and emits light is dispersed in the sealing portion 19, the light emitted from the light emitting element 2 and the light emitted from the fluorescent glass 3 are emitted. A light output is obtained which is a composite of the light emitted from the phosphor powder and the light emitted from the phosphor powder. That is, similar to the twenty-fifth embodiment, if a material that emits near-ultraviolet light is selected as the material of the light emitting layer portion 21 of the light emitting element 2, the fluorescent glass 3 and the sealing portion 19 are emitted by the light emitted from the light emitting element 2. Both of the phosphor powder in the inside are excited and each emits a unique light emission,
The combined light will be obtained. Also in this embodiment, the emission color of the phosphor powder is made different from the emission color of the fluorescent glass 3. However, if the emission color of the phosphor powder is aligned with the emission color of the fluorescent glass 3, the fluorescent glass 3 The light emission of the phosphor powder is superimposed on the light emission of, and the light output can be increased, and the light emission efficiency can be increased.

(Embodiment 35) The light emitting device 1 of the present embodiment
40 is substantially the same as that of the twelfth and twenty-second embodiments, and as shown in FIG. The light-emitting layer portion 21 of the light-emitting element 2 is a AlGaN-based material that emits near-ultraviolet light.
Phosphor powder (for example, YAG: Ce ³⁺ phosphor powder that emits yellow light when excited by near-ultraviolet light is emitted) is dispersed in a translucent resin such as an epoxy resin used as the sealing unit 19. Is characterized by. Further, in the present embodiment, as the fluorescent glass 3, a fluorophosphate glass (for example, P ₂ O ₅ .AlF that emits blue light when excited by near-ultraviolet light is emitted).
₃ · MgF · CaF ₂ · SrF ₂ · BaCl ₂ : Eu ²⁺ ) is used. The same components as those in Embodiments 12 and 22 will be assigned the same reference numerals and explanations thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Similar to the twenty-fifth embodiment, since the phosphor powder that is excited by the light from the light emitting element 2 and emits light is dispersed in the sealing portion 19, the light emitted from the light emitting element 2 and the light emitted from the fluorescent glass 3 are emitted. A light output is obtained which is a composite of the light emitted from the phosphor powder and the light emitted from the phosphor powder. That is, similar to the twenty-fifth embodiment, if a material that emits near-ultraviolet light is selected as the material of the light emitting layer portion 21 of the light emitting element 2, the fluorescent glass 3 and the sealing portion 19 are emitted by the light emitted from the light emitting element 2. Both of the phosphor powder in the inside are excited and each emits a unique light emission,
The combined light will be obtained. Also in this embodiment, the emission color of the phosphor powder is made different from the emission color of the fluorescent glass 3. However, if the emission color of the phosphor powder is aligned with the emission color of the fluorescent glass 3, the fluorescent glass 3 The light emission of the phosphor powder is superimposed on the light emission of, and the light output can be increased, and the light emission efficiency can be increased.

(Embodiment 36) The light emitting device 1 of the present embodiment
41 is substantially the same as that of the twelfth embodiment, and as shown in FIG. 41, the light emitting element 2 is provided on the upper surface side of the insulating substrate 16.
The light emitting layer portion 2 of the light emitting element 2 is provided with a sealing portion 19 for sealing the
1 is an AlGaN-based material that emits near-ultraviolet light, and phosphor powder (for example, YAG that emits yellow light when excited by near-ultraviolet light) is contained in a translucent resin such as an epoxy resin used as the sealing portion 19. : Ce ³⁺ phosphor powder) is dispersed. Further, in the present embodiment, as the fluorescent glass 3, a fluorophosphate glass (for example, P ₂ O ₅ .AlF ₃ which emits blue light when excited by near-ultraviolet light is emitted).
_{· MgF · CaF 2 · SrF 2} · BaCl 2: are used Eu ^2+). The same components as in the twelfth embodiment are designated by the same reference numerals, and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Similar to the twenty-fifth embodiment, since the phosphor powder that is excited by the light from the light emitting element 2 and emits light is dispersed in the sealing portion 19, the light emitted from the light emitting element 2 and the light emitted from the fluorescent glass 3 are emitted. A light output is obtained which is a composite of the light emitted from the phosphor powder and the light emitted from the phosphor powder. That is, similar to the twenty-fifth embodiment, if a material that emits near-ultraviolet light is selected as the material of the light emitting layer portion 21 of the light emitting element 2, the fluorescent glass 3 and the sealing portion 19 are emitted by the light emitted from the light emitting element 2. Both of the phosphor powder in the inside are excited and each emits a unique light emission,
The combined light will be obtained. Also in this embodiment, the emission color of the phosphor powder is made different from the emission color of the fluorescent glass 3. However, if the emission color of the phosphor powder is aligned with the emission color of the fluorescent glass 3, the fluorescent glass 3 The light emission of the phosphor powder is superimposed on the light emission of, and the light output can be increased, and the light emission efficiency can be increased.

(Embodiment 37) The light emitting device 1 of the present embodiment
42 is substantially the same as that of the 16th embodiment, and as shown in FIG. The second light emitting layer portion 21 is an AlGaN-based material that emits near-ultraviolet light. It is characterized in that YAG: Ce ³⁺ phosphor powder that emits light is dispersed. In the present embodiment, as the fluorescent glass 3, a fluorophosphate glass (for example, P ₂ O ₅ · AlF ₃ · MgF · CaF ₂ · SrF ₂ · BaC that emits blue light when excited by near-ultraviolet light is emitted).
l ₂ : Eu ²⁺ ) is used. The same components as those of the sixteenth embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Similar to the twenty-fifth embodiment, since the phosphor powder that is excited by the light from the light emitting element 2 and emits light is dispersed in the sealing portion 19, the light emitted from the light emitting element 2 and the light emitted from the fluorescent glass 3 are emitted. A light output is obtained which is a composite of the light emitted from the phosphor powder and the light emitted from the phosphor powder. That is, similar to the twenty-fifth embodiment, if a material that emits near-ultraviolet light is selected as the material of the light emitting layer portion 21 of the light emitting element 2, the fluorescent glass 3 and the sealing portion 19 are emitted by the light emitted from the light emitting element 2. Both of the phosphor powder in the inside are excited and each emits a unique light emission,
The combined light will be obtained. Also in this embodiment, the emission color of the phosphor powder is made different from the emission color of the fluorescent glass 3. However, if the emission color of the phosphor powder is aligned with the emission color of the fluorescent glass 3, the fluorescent glass 3 The light emission of the phosphor powder is superimposed on the light emission of, and the light output can be increased, and the light emission efficiency can be increased.

(Embodiment 38) The light emitting device 1 of the present embodiment
43 is substantially the same as that of the twentieth embodiment, and as shown in FIG. 43, the recess 16a formed in one surface (the upper surface in FIG. 43) of the insulating substrate 16 is filled to seal the light emitting element 2. The light emitting layer portion 21 of the light emitting element 2 is provided with the sealing portion 19.
Is an AlGaN-based material that emits near-ultraviolet light, and a phosphor powder (for example, YAG that emits yellow light when excited by near-ultraviolet light: It is characterized in that Ce ³⁺ phosphor powder) is dispersed. Further, in the present embodiment, as the fluorescent glass 3, fluorophosphate salt-based glass (e.g., P ₂ O ₅ · AlF ₃ that emits blue light by being excited by near ultraviolet light,
MgF · CaF ₂ · SrF ₂ · BaCl ₂ : Eu ²⁺ ) is used. The same components as in the twentieth embodiment are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Similar to the twenty-fifth embodiment, since the phosphor powder that is excited by the light from the light emitting element 2 and emits light is dispersed in the sealing portion 19, the light emitted from the light emitting element 2 and the light emitted from the fluorescent glass 3 are emitted. A light output is obtained which is a composite of the light emitted from the phosphor powder and the light emitted from the phosphor powder. That is, similar to the twenty-fifth embodiment, if a material that emits near-ultraviolet light is selected as the material of the light emitting layer portion 21 of the light emitting element 2, the fluorescent glass 3 and the sealing portion 19 are emitted by the light emitted from the light emitting element 2. Both of the phosphor powder in the inside are excited and each emits a unique light emission,
The combined light will be obtained. Also in this embodiment, the emission color of the phosphor powder is made different from the emission color of the fluorescent glass 3. However, if the emission color of the phosphor powder is aligned with the emission color of the fluorescent glass 3, the fluorescent glass 3 The light emission of the phosphor powder is superimposed on the light emission of, and the light output can be increased, and the light emission efficiency can be increased.

(Embodiment 39) The light emitting device 1 of the present embodiment
The basic configuration of FIG.
As shown in FIG. 4, the light emitting element 2 is filled with the recess 16a formed in one surface (the upper surface in FIG. 44) of the insulating substrate 16.
The light emitting layer portion 2 of the light emitting element 2 is provided with a sealing portion 19 for sealing the
1 is an AlGaN-based material that emits near-ultraviolet light, and phosphor powder (for example, YAG that emits yellow light when excited by near-ultraviolet light) is contained in a translucent resin such as an epoxy resin used as the sealing portion 19. : Ce ³⁺ phosphor powder) is dispersed. Further, in the present embodiment, as the fluorescent glass 3, a fluorophosphate glass (for example, P ₂ O ₅ .AlF ₃ which emits blue light when excited by near-ultraviolet light is emitted).
_{· MgF · CaF 2 · SrF 2} · BaCl 2: are used Eu ^2+). The same components as those in the fifth and twelfth embodiments are designated by the same reference numerals and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Similar to the twenty-fifth embodiment, since the phosphor powder that is excited by the light from the light emitting element 2 and emits light is dispersed in the sealing portion 19, the light emitted from the light emitting element 2 and the light emitted from the fluorescent glass 3 are emitted. A light output is obtained which is a composite of the light emitted from the phosphor powder and the light emitted from the phosphor powder. That is, similar to the twenty-fifth embodiment, if a material that emits near-ultraviolet light is selected as the material of the light emitting layer portion 21 of the light emitting element 2, the fluorescent glass 3 and the sealing portion 19 are emitted by the light emitted from the light emitting element 2. Both of the phosphor powder in the inside are excited and each emits a unique light emission,
The combined light will be obtained. Also in this embodiment, the emission color of the phosphor powder is made different from the emission color of the fluorescent glass 3. However, if the emission color of the phosphor powder is aligned with the emission color of the fluorescent glass 3, the fluorescent glass 3 The light emission of the phosphor powder is superimposed on the light emission of, and the light output can be increased, and the light emission efficiency can be increased.

(Embodiment 40) The light emitting device 1 of the present embodiment
The basic configuration of is similar to that of Embodiments 20 and 21, and as shown in FIG. The light-emitting layer portion 21 of the light-emitting element 2 includes an AlGaN-based light-emitting layer portion 21 that emits near-ultraviolet light.
Phosphor powder (for example, YAG: Ce ³⁺ phosphor powder that emits yellow light when excited by near-ultraviolet light is emitted) is dispersed in a translucent resin such as an epoxy resin used as the sealing unit 19. Is characterized by. Further, in the present embodiment, as the fluorescent glass 3, a fluorophosphate glass (for example, P ₂ O ₅ .AlF that emits blue light when excited by near-ultraviolet light is emitted).
₃ · MgF · CaF ₂ · SrF ₂ · BaCl ₂ : Eu ²⁺ ) is used. The same components as those in Embodiments 20 and 21 are designated by the same reference numerals, and the description thereof will be omitted.

Therefore, in the light emitting device 1 of this embodiment,
Similar to the twenty-fifth embodiment, since the phosphor powder that is excited by the light from the light emitting element 2 and emits light is dispersed in the sealing portion 19, the light emitted from the light emitting element 2 and the light emitted from the fluorescent glass 3 are emitted. A light output is obtained which is a composite of the light emitted from the phosphor powder and the light emitted from the phosphor powder. That is, similar to the twenty-fifth embodiment, if a material that emits near-ultraviolet light is selected as the material of the light emitting layer portion 21 of the light emitting element 2, the fluorescent glass 3 and the sealing portion 19 are emitted by the light emitted from the light emitting element 2. Both of the phosphor powder in the inside are excited and each emits a unique light emission,
The combined light will be obtained. Also in this embodiment, the emission color of the phosphor powder is made different from the emission color of the fluorescent glass 3. However, if the emission color of the phosphor powder is aligned with the emission color of the fluorescent glass 3, the fluorescent glass 3 The light emission of the phosphor powder is superimposed on the light emission of, and the light output can be increased, and the light emission efficiency can be increased.

In each of the above embodiments, the fluorescent glass 3 is processed into a desired shape or formed by the sol-gel method. However, as shown in FIG. 46, the fluorescent glass 3 has a diameter larger than that of the visible wavelength. If the fluorescent glass 3 is formed in a slightly large spherical shape and a large number of fluorescent glasses 3 are dispersed in the solid medium 35 made of translucent resin or glass to be used in place of the fluorescent glass in each of the above-described embodiments, it is possible to obtain a visible wavelength range. While maintaining the transparency of the fluorescent glass, the amount of material used for the fluorescent glass can be reduced, and the cost can be reduced.

Further, although the light emitting device 1 of each of the above-mentioned embodiments is provided with only one light emitting element 2, a plurality of light emitting elements 2 are provided.
It is needless to say that one unit module may be constituted by the above and the fluorescent glass as a light emitting substance may be disposed in proximity to at least a part of the module. Note that, for example, the shell-shaped mold portion 11 as described in the first embodiment is used.
In the case of a light emitting device including the above, a plurality of light emitting devices may be mounted on the same printed circuit board to form one unit module. Further, for example, in the surface-mounted light emitting device as described in the second embodiment, a plurality of light emitting elements 2 may be arranged on the same insulating substrate 16 to form a unit module.

[0119]

According to the first aspect of the present invention, there is provided a light emitting device comprising a light emitting element and a light emitting material which is excited by light from the light emitting element and emits light having a desired wavelength. It is made of fluorescent glass that is doped with ions that become the emission center and has translucency in the visible wavelength range, and is also used as a substrate that forms a light-emitting element. Compared to the one in which phosphor powder is dispersed in a light-sensitive resin or glass, it has superior translucency, and part of the light emitted from the light-emitting element is emitted to the outside as it is. Ions serving as luminescence centers are excited by the other part, and the light due to the luminescence peculiar to the ions is emitted to the outside, so that a combined light of the light emitted from the light emitting element and the light emitted from the fluorescent glass is obtained Can also obedience It is possible to reduce the light color unevenness and light color variations in comparison with, there is an effect that it is possible to increase the efficiency of light extraction to the outside. That is, when the phosphor powder is dispersed in a translucent resin or glass as in the conventional case or when the phosphor layer is formed by a sputtering method, it exhibits an optically cloudy or cloudy property, and the degree of cloudiness or It is extremely difficult to keep the degree of fogging constant, and uneven light color and light color variations among light emitting devices are likely to occur, and scattering loss due to phosphor powder causes light emitted by the light emitting element. However, since the fluorescent glass has high transparency without clouding or turbidity, it has excellent uniformity of light color, and there is almost no variation in light color between light emitting devices.
The light extraction efficiency of the light emitting element to the outside can be increased as compared with the conventional one. Further, since the fluorescent glass is also used as the substrate for forming the light emitting element, some of the light from the light emitting element can efficiently excite the ion serving as the emission center in the fluorescent glass, and the light emission peculiar to the ion. There is an effect that the brightness of light can be increased.

The invention according to claim 2 comprises a light emitting element, a sealing portion or a molding portion for sealing the light emitting element, and a light emitting substance which is excited by light from the light emitting element to emit light of a desired wavelength. In the light emitting device, the light emitting material is made of fluorescent glass in which ions serving as luminescence centers are doped in the glass and has a light-transmitting property in a visible wavelength range, and also serves as at least a part of the sealing portion or the molding portion. Fluorescent glass is superior in transparency as compared with the conventional one in which phosphor powder is dispersed in transparent resin or glass, and a part of the light emitted from the light emitting element remains as it is. The light that is emitted to the outside is also emitted from the light-emitting element because the ion serving as the emission center is excited by another part of the light emitted from the light-emitting element, and the light due to the emission unique to the ion is emitted to the outside. With light It is possible to obtain a combined light with the light emitted from the optical glass, and it is possible to reduce light color unevenness and light color variation as compared with the conventional one, and to improve the efficiency of extracting light to the outside. There is an effect. That is, when the phosphor powder is dispersed in a translucent resin or glass as in the conventional case or when the phosphor layer is formed by a sputtering method, it exhibits an optically cloudy or cloudy property, and the degree of cloudiness or It is extremely difficult to keep the degree of fogging constant, and uneven light color and light color variations among light emitting devices are likely to occur, and scattering loss due to phosphor powder causes light emitted by the light emitting element. However, since the fluorescent glass has high transparency without clouding or turbidity, it has excellent uniformity of light color, and there is almost no variation in light color between light emitting devices. The efficiency of extracting light to the outside can be increased as compared with the conventional case. Furthermore, since the fluorescent glass is also used as at least a part of the sealing part or the mold part, a part of the light from the light emitting element can efficiently excite the ions serving as the luminescence center in the fluorescent glass. There is an effect that the brightness of light due to light emission peculiar to ions can be increased.

The invention of claim 3 comprises a light emitting element, a sealing portion or a molding portion for sealing the light emitting element, and a light emitting substance which is excited by light from the light emitting element to emit light of a desired wavelength. In the light emitting device, the light emitting material is made of fluorescent glass in which ions serving as an emission center are doped in the glass and has a light-transmitting property in a visible wavelength range, and is close to the outside of the sealing portion or the mold portion. The fluorescent glass is superior in translucency as compared with the conventional one in which phosphor powder is dispersed in a transparent resin or glass, and a part of the light emitted from the light emitting element. Is emitted to the outside as it is, and the ion that is the emission center is excited by another part of the light emitted from the light emitting element, and the light due to the emission peculiar to the ion is emitted to the outside. Light and firefly It is possible to obtain synthetic light with the light emitted from the glass, and to reduce light color unevenness and light color variation compared to the conventional one, and to improve the efficiency of extracting light to the outside. effective. That is, when the phosphor powder is dispersed in a translucent resin or glass as in the conventional case or when the phosphor layer is formed by a sputtering method, it exhibits an optically cloudy or cloudy property, and the degree of cloudiness or It is extremely difficult to keep the degree of fogging constant, and uneven light color and light color variations among light emitting devices are likely to occur, and scattering loss due to phosphor powder causes light emitted by the light emitting element. However, since the fluorescent glass has high transparency without clouding or turbidity, it has excellent uniformity of light color, and there is almost no variation in light color between light emitting devices. The efficiency of extracting light to the outside can be increased as compared with the conventional case. Further, since the fluorescent glass is disposed close to the outside of the sealing part or the mold part, a part of the light from the light emitting element can efficiently excite the ion serving as the emission center in the fluorescent glass. Therefore, there is an effect that the brightness of light due to the light emission peculiar to the ion can be increased.

According to a fourth aspect of the present invention, there is provided a light emitting device comprising a light emitting element and a light emitting substance which emits light of a desired wavelength when excited by light from the light emitting element. The unit is composed of a module, and the luminescent material is made of fluorescent glass which is doped with ions serving as an emission center in the glass and has a light-transmitting property in a visible wavelength range, and is disposed in the vicinity of at least a part of the module. Fluorescent glass is superior in translucency as compared to the conventional one in which phosphor powder is dispersed in transparent resin or glass, and a part of the light emitted from the light emitting element is directly output to the outside. Light emitted from the light emitting element, the other part of the light emitted from the light emitting element excites the ion serving as the emission center and emits light due to light emission specific to the ion to the outside. And firefly It is possible to obtain synthetic light with the light emitted from the glass, and to reduce light color unevenness and light color variation compared to the conventional one, and to improve the efficiency of extracting light to the outside. effective. That is, when the phosphor powder is dispersed in a translucent resin or glass as in the conventional case or when the phosphor layer is formed by a sputtering method, it exhibits an optically cloudy or cloudy property, and the degree of cloudiness or It is extremely difficult to keep the degree of fogging constant, and uneven light color and light color variations among light emitting devices are likely to occur, and scattering loss due to phosphor powder causes light emitted by the light emitting element. However, since the fluorescent glass has high transparency without clouding or turbidity, it has excellent uniformity of light color, and there is almost no variation in light color between light emitting devices. The efficiency of extracting light to the outside can be increased as compared with the conventional case. Further, since the fluorescent glass is disposed in the vicinity of at least a part of the module, it is possible to efficiently excite the ions serving as the luminescence center in the fluorescent glass by a part of the light from the light emitting element,
There is an effect that the brightness of light due to the light emission peculiar to the ion can be increased.

According to a fifth aspect of the present invention, in the inventions of the second to fourth aspects, the luminescent material is formed by processing fluorescent glass into a desired shape. There is an effect that it can be handled as a processed part made of glass.

According to a sixth aspect of the present invention, in the inventions of the second to fourth aspects, the luminescent substance is solidified into a desired shape by a sol-gel method. The method has an effect that it can be formed into a desired shape.

According to a seventh aspect of the present invention, in the second aspect to the fourth aspect, the fluorescent glass is formed into a spherical shape having a diameter larger than a visible wavelength and dispersed in a transparent resin or glass. Therefore, there is an effect that the amount of material used for the fluorescent glass can be reduced while maintaining the transparency of the fluorescent glass in the visible wavelength range.

According to an eighth aspect of the present invention, in the first to seventh aspects of the present invention, since the phosphor powder that is excited by the light from the light emitting element emits light, the light emitted from the light emitting element and the There is an effect that a light output is obtained which is a combined light of the light emitted from the fluorescent glass and the light emitted from the phosphor powder.

According to the invention of claim 9, in the invention of claim 8, since the emission color of the phosphor powder is aligned with the emission color of the light emitting substance, the emission of the phosphor powder is superimposed on the emission of the light emitting substance. Therefore, there is an effect that the light output can be increased and the luminous efficiency can be improved.

In the invention of claim 10, in the invention of claim 8, the luminescent color of the phosphor powder is different from the luminescent color of the luminescent substance. Therefore, the invention can be obtained only by the light emitting element and the fluorescent glass. There is an effect that it is possible to obtain a non-luminous color characteristic.

[Brief description of drawings]

1 shows the first embodiment, (a) is a schematic sectional view,
(B) is an enlarged view of a main part of (a).

FIG. 2 is a schematic cross-sectional view showing a second embodiment.

FIG. 3 is a schematic sectional view showing a third embodiment.

FIG. 4 is a schematic cross-sectional view showing a fourth embodiment.

FIG. 5 is a schematic sectional view showing a fifth embodiment.

FIG. 6 is a schematic sectional view showing a sixth embodiment.

FIG. 7 is a schematic sectional view showing a seventh embodiment.

FIG. 8 is a schematic sectional view showing an eighth embodiment.

FIG. 9 is a schematic cross-sectional view showing a ninth embodiment.

FIG. 10 is a schematic cross-sectional view showing Embodiment 10.

FIG. 11 is a schematic sectional view showing an eleventh embodiment.

FIG. 12 is a schematic sectional view showing Embodiment 12.

FIG. 13 is a schematic cross-sectional view showing Embodiment 13.

FIG. 14 is a schematic cross-sectional view showing Embodiment 14.

FIG. 15 is a schematic sectional view showing Embodiment 15.

FIG. 16 is a schematic cross-sectional view showing Embodiment 16.

FIG. 17 is a schematic sectional view showing Embodiment Mode 17.

FIG. 18 is a schematic sectional view showing an eighteenth embodiment.

FIG. 19 is a schematic cross-sectional view showing Embodiment 19.

FIG. 20 is a schematic sectional view showing Embodiment 20.

FIG. 21 is a schematic sectional view showing Embodiment 21.

FIG. 22 is a cross-sectional view of relevant parts of the same.

FIG. 23 is a schematic sectional view showing Embodiment 22.

FIG. 24 is a cross-sectional view of an essential part of the above.

FIG. 25 is a schematic sectional view showing Embodiment 23.

FIG. 26 is a perspective view of an essential part of the above.

FIG. 27 is a schematic sectional view showing Embodiment 24.

FIG. 28 is a cross-sectional view of an essential part of the above.

FIG. 29 is a perspective view of an essential part of the above.

FIG. 30 is a schematic sectional view showing Embodiment 25.

FIG. 31 is a schematic sectional view showing Embodiment 26.

FIG. 32 is a schematic sectional view showing Embodiment 27.

FIG. 33 is a schematic sectional view showing Embodiment 28.

FIG. 34 is a schematic sectional view showing Embodiment 29.

FIG. 35 shows an embodiment 30, (a) is a schematic sectional view,
(B) is an enlarged view of a main part of (a).

FIG. 36 is a schematic sectional view showing Embodiment 31.

FIG. 37 is a schematic sectional view showing Embodiment 32.

FIG. 38 is a schematic sectional view showing Embodiment 33.

FIG. 39 is a schematic sectional view showing Embodiment 34.

FIG. 40 is a schematic sectional view showing Embodiment 35.

41 is a schematic sectional view showing Embodiment 36. FIG.

FIG. 42 is a schematic sectional view showing Embodiment 37.

FIG. 43 is a schematic sectional view showing Embodiment 38.

FIG. 44 is a schematic sectional view showing Embodiment 39.

FIG. 45 is a schematic sectional view showing Embodiment 40.

FIG. 46 is an explanatory diagram of another configuration example of the main part of each embodiment.

FIG. 47 is an explanatory diagram of a basic concept of each embodiment.

[Explanation of symbols]

1 Light emitting device 2 light emitting element 3 Fluorescent glass 11 Mold part 21 Light emitting layer 23 Reflective layer

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hideyoshi Kimura             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company F-term (reference) 5F041 AA11 AA14 CA40 CA46 CB15                       DA07 DA09 DA18 DA19 DA26                       DA36 DA44 DA46 DA47

Claims (10)

[Claims] 1. A light-emitting device comprising a light-emitting element and a light-emitting substance that emits light of a desired wavelength when excited by light from the light-emitting element, the light-emitting substance being an ion serving as an emission center in glass. A light-emitting device comprising: a fluorescent glass that is doped with and having a light-transmitting property in a visible wavelength range, and is also used as a substrate for forming a light-emitting element. 2. A light emitting device comprising a light emitting element, a sealing portion or a molding portion for sealing the light emitting element, and a light emitting substance which is excited by light from the light emitting element to emit light of a desired wavelength. The luminescent material is made of fluorescent glass, which is doped with ions serving as luminescence centers in the glass and has translucency in the visible wavelength range, and is also used as at least a part of the sealing part or the mold part. Characterized light emitting device. 3. A light emitting device comprising a light emitting element, a sealing portion or a molding portion for sealing the light emitting element, and a light emitting substance which is excited by light from the light emitting element and emits light of a desired wavelength. The luminescent material is made of fluorescent glass, which is doped with ions serving as luminescence centers in the glass and has a light-transmitting property in the visible wavelength range, and is disposed close to the outside of the sealing part or the mold part. A light-emitting device characterized by the above. 4. A light emitting device comprising a light emitting element and a light emitting material which emits light of a desired wavelength when excited by light from the light emitting element, wherein a plurality of light emitting elements constitutes one unit module. However, the luminescent material is made of fluorescent glass in which ions serving as luminescence centers are doped into the glass and has a light-transmitting property in the visible wavelength range, and the luminescent material is disposed in the vicinity of at least a part of the module. Light emitting device. 5. The light emitting material is formed by processing fluorescent glass into a desired shape.
The light emitting device according to claim 4. 6. The light emitting device according to claim 2, wherein the light emitting substance is formed by solidifying into a desired shape by a sol-gel method. 7. The fluorescent glass is formed in a spherical shape having a diameter larger than a visible wavelength and is dispersed in a translucent resin or glass. The light-emitting device according to. 8. A phosphor powder which is excited by light emitted from the light emitting element to emit light.
The light emitting device according to claim 7. 9. The light emitting device according to claim 8, wherein the emission color of the phosphor powder is aligned with the emission color of the light emitting substance. 10. The emission color of the phosphor powder is different from the emission color of the light emitting substance.
The light emitting device described.