JPH1083709A - Light emitting unit, unit for lighting fixture, and signal lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light emitting unit, unit for lighting fixture, and signal lighting fixture which can give the desired light distribution characteristics. SOLUTION: An LED module 11a is formed so that a plurality of LEDs 102 are mounted on a base board 12a and a plurality of such modules are arranged cylindrically so that a side face light emission part 11 is accomplished. Narrow angle type LES's are used in the side face light emission part 11 while wide angle LED's are used in a front surface light emission part 12. Therein the condition 0.2<=B/(A+B)<=0.7 should be met, where A is the light-quantity of the front surface light emission part 12 and B is that of the side face light emission part 11. The light emitting unit 1 is accommodated in a reflecting body 2 and a transparent front face cover 3 is installed at the front face of the reflecting body 2 so that a unit 4 for lighting fixture is constituted. The side face light emission part 11 serves for the light distribution control made with the reflecting body 2 and the desired light distribution characteristics can be obtained. Even in the case LEDs 12a are mounted on a flat form base board 12a, the desired light distribution characteristics can be generated by making the light distribution characteristic of each LED the desired characteristic of the light emitting unit 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a light emitting unit using a light emitting diode (LED) as a light source, a lamp unit, and a signal lamp.

[0002]

2. Description of the Related Art The use of an LED as a light source for a signal lamp is known, for example, from JP-A-2-226604. Since LEDs are solid-state light sources and have a long service life, they can be replaced with a long interval, and are attracting attention as light sources that exhibit high reliability over a long period of time. It is being used in signal lights instead of incandescent light bulbs. Recently, blue and green LEDs have been able to obtain sufficiently practical light quantity and light color, so that application to signal lamps has been further expanded.

[0003]

In the case of an incandescent light bulb, light is emitted by the incandescence of the filament enclosed in the glass bulb, so that the light emitting portion can be made smaller, and therefore the reflector can be easily designed, and the desired light distribution and luminous intensity, that is, the light distribution can be obtained. Obtaining optical properties is relatively easy.

However, in the case of a light emitting diode, it is common to use surface light emission in which a large number of small LEDs are arranged, and it is difficult to efficiently obtain a desired light distribution characteristic using a reflector. Was.

An object of the present invention is to provide a light-emitting unit, a lamp unit, and a signal lamp which can obtain desired light distribution characteristics using an LED as a light source.

[0006]

According to a first aspect of the present invention, there is provided a light emitting unit having a plurality of LEDs mounted on a substrate.
A side light-emitting unit in which a plurality of D modules are arranged in a cylindrical shape; a front light-emitting unit that is configured by mounting a plurality of LEDs on a substrate and is disposed in front of the side light-emitting unit; And a base disposed on the base plate.

[0007] In the present invention and each of the following claims, the LEDs of the side light-emitting portion and the front light-emitting portion are not only one or a plurality of LEDs embedded in a transparent synthetic resin lens but also a substrate. A plurality of LED elements may be formed integrally with a transparent synthetic resin. When embedded in a synthetic resin lens, a combination of an LED element and a micro reflector may be used.

[0008] The substrate of the side light emitting portion need not be a flat plate. For example, if the substrate is curved so as to form a part of an arc in a plane perpendicular to the optical axis, the cylinder of the side light emitting portion may be formed. It is also possible to make the shape cylindrical. in addition,
A substrate which is appropriately curved in the optical axis direction may be used. Then, if desired, the cylindrical shape can be made closer to the shape of the glass bulb of the light bulb. Further, even when a flat substrate is used, the cylindrical shape may be any shape including a triangular prism.

The front light-emitting portion does not need to be adjacent to the side light-emitting portion, and may be slightly separated if necessary.

The substrate of the front light emitting section does not need to be a flat plate, and may be a substrate having a curved shape so as to form a part of an arc.

Further, in order to join the respective substrates of the side-surface light emitting portion, the specific configuration is free, such as, for example, preparing a frame and fixing the respective substrates around the frame. Similarly, the side light emitting portion and the front light emitting portion can be freely joined. If necessary, the substrate of the side emission unit and the substrate of the front emission unit may be integrated. In such a case, the side emission unit and the front emission unit are defined as follows. That is, a portion that mainly emits light to the side is a side emission portion, and a portion that mainly emits light to the front side is a front emission portion.

As the base, a base similar to a light-emitting body such as an existing bulb can be used for reasons such as compatibility with existing lamps. However, the present invention is not limited to this, and any base can be used.

[0013] In the present invention, if an LED having a narrow-angle light distribution is used as an LED of the side light-emitting portion as required, reflection at the reflector becomes efficient, thereby improving the efficiency of the device and controlling the light distribution. In addition, when a wide-angle LED is used as the LED of the front light emitting unit, the appearance of the lamp from the front is improved.

Further, as required, when the light emission amount of the front light emitting portion is A and the light emission amount of the side light emitting portion is B, 0.2
By satisfying the condition of ≦ B / (A + B) ≦ 0.7, the luminous intensity can be increased and the efficiency of the apparatus can be improved.

According to a second aspect of the present invention, there is provided a light-emitting unit having a plurality of narrow-angle light-distribution LEDs arranged on a side surface of the light-emitting unit; And a part.

In the present invention, when the light-emitting unit is used as a lamp unit in combination with a reflector, the light emitted from the LED of the side-surface light-emitting portion mainly enters the reflector. Light distribution control becomes easier. In addition, since the light emitted from the front light emitting unit is mainly emitted directly from the lamp unit to the outside, a wide-angle light distribution can improve visibility from a distance.

In the present invention, the narrow-angle light distribution type and the wide-angle light distribution type may be relatively determined. Therefore, when the LEDs of the front-side light emitting unit and the side-side light emitting unit are compared, the former light distribution is different. If the light distribution is wider than the light distribution of the latter, it is assumed that the former has a relatively wide-angle light distribution and the latter has a relatively narrow-angle light distribution.

The side emission section may be formed entirely of a single substrate, and may therefore be configured not to use a plurality of substrates. The substrate may be integrally formed with the front light emitting unit and the side light emitting unit.

If necessary, the structure of the first aspect of the present invention can be adopted as the structure of the light emitting unit.

Further, if necessary, when the light emission amount of the front light emitting portion is A and the light emission amount of the side light emitting portion is B, 0.2
By satisfying the condition of ≦ B / (A + B) ≦ 0.7, the luminous intensity can be increased and the efficiency of the apparatus can be improved.

According to a third aspect of the present invention, there is provided a light emitting unit having a plurality of LEDs disposed on a front surface thereof, the amount of light emission of which is A and a front light emitting portion; B
And a side emission section satisfying the following condition:

0.2 ≦ B / (A + B) ≦ 0.7 In the present invention, when the light emission amount ratio between the side light emitting portion and the front light emitting portion is set as described above, the light emitting device is used in combination with a reflector. In addition, the luminous intensity can be increased and the tool efficiency can be set in a preferable range. Further, according to this range, the appearance becomes good.

In the present invention, the side emission section may have a plurality of substrates or a single substrate. The light distribution of the LED is not particularly limited.

In the present invention, the structure of claim 1 and / or claim 2 can be adopted as required.

According to a fourth aspect of the present invention, in the light emitting unit according to any one of the first to third aspects,
The LEDs of the side-surface light-emitting unit are characterized in that they are arranged so as to emit a main beam in a substantially radial direction about the center axis in a plane orthogonal to the center axis of the side-surface light-emitting unit.

When the light emitting unit of the present invention is used as a lamp unit in combination with a reflector, if the focal point of the reflector is located on the central axis of the side light emitting portion, each of the LEs can be obtained.
Even if D is not at the focal point, it is possible to realize the same light distribution and increase in the amount of light as at the focal point in a plane orthogonal to the optical axis. In particular, the narrower the light distribution of the LED, the higher the reflection efficiency can be obtained. Then, LEDs having a fairly strong narrow-angle light distribution can be easily obtained. In the present invention, if it is not necessary to increase the amount of light, it is possible to reduce the number of LEDs used, thereby reducing the size and cost, and further reduce the heat generated by the LEDs and the LED drive circuit with the decrease. be able to.

According to a fifth aspect of the present invention, in the light emitting unit according to any one of the first to fourth aspects,
The LEDs of the side-surface light-emitting unit are characterized in that they are arranged so as to emit a main beam in a substantially radial direction about a predetermined position on the center axis in a plane including the central axis of the side-surface light-emitting unit.

When the light emitting unit of the present invention is used in combination with a reflector, if the predetermined position of the light emitting unit is matched with the focal position of the reflector, the optical axis can be adjusted even if the individual LEDs are not on the focal point. In the plane including the light, it is possible to realize the same light distribution and increase in the amount of light as those substantially on the focal point. If the amount of light does not need to be increased, the number of LEDs used can be reduced, the size and cost can be reduced, and the heat generated by the LEDs and the LED drive circuit can be reduced with the decrease.

According to a sixth aspect of the present invention, in the light emitting unit according to any one of the first to fifth aspects,
The LED of the side light emitting portion has a straight line drawn from a predetermined position on the substantially central axis at right angles to the central axis and an angle of 10 ° before and after the predetermined position in the plane including the central axis of the side light emitting portion. In the first region formed between the first region and the straight line drawn so as to form the main beam, the second region is disposed so as to emit the main beam in a direction substantially perpendicular to the central axis and exceeds 10 °. Are characterized in that they are arranged so as to emit a main beam substantially in a radiation direction centered on a predetermined position.

In the present invention, the position of the LED is
Is determined with reference to the center position of the upper surface of

In the present invention, an operation similar to the above-mentioned invention is performed. That is, if the angle is within 10 °, even if the LED emits the main beam in a direction perpendicular to the central axis, the difference is much smaller than the arrangement in which the main beam is emitted in an ideal direction as described in claim 5. Because there is no. Then, by arranging the LEDs so as to emit the main beam in a direction perpendicular to the central axis, the mounting becomes extremely simple. As in the fifth aspect, the number of LEDs can be reduced.

According to a seventh aspect of the present invention, in the light emitting unit according to any one of the first to fifth aspects,
The LED of the side light emitting portion has a straight line drawn from a predetermined position on the substantially central axis at right angles to the central axis and an angle of 10 ° before and after the predetermined position in the plane including the central axis of the side light emitting portion. In a first region formed between the first region and the straight line drawn so as to form a main beam in a direction substantially perpendicular to the central axis, and in a second region exceeding 10 ° Are arranged to emit a main beam in a substantially radial direction about a predetermined position, and to emit the main beam in a substantially radial direction about the central axis in a plane orthogonal to the central axis. It is characterized by:

The angle in the present invention is defined in the same manner as in claim 6.

The present invention is very effective because it functions like a so-called point light source where each LED is disposed at the focal point in a three-dimensional space.

The light emitting unit according to the invention of claim 8 is the light emitting unit according to any one of claims 1 to 4, wherein
The LED of the side light emitting unit is arranged such that, within a plane including the central axis of the side light emitting unit, a straight line drawn from a predetermined position on the central axis at right angles to the central axis and a predetermined position as a center are respectively 3
It is characterized by being arranged so as to emit a main beam only in a region formed between a straight line drawn at an angle of 0 ° and a direction substantially perpendicular to the central axis.

Although the present invention does not fall within the scope of the fifth aspect of the present invention, it can operate in a similar manner and reduce the number of LEDs.

According to a ninth aspect of the present invention, in the light emitting unit according to any one of the first to eighth aspects, the LED driving circuit of the side light emitting unit is mounted on the substrate of the side light emitting unit so as to be exposed to the outside. Features.

In the present invention, the driving circuit is necessary for driving the LED, and it is a structural feature that the driving circuit is integrated with the light emitting unit and is exposed to the outside. This allows the light emitting unit to have a diameter close to that of a conventional incandescent light bulb for a signal light, and can be used simply by connecting the light emitting unit to a power source via a base. In short, compatibility with existing light bulbs and the like can be provided. Further, since the drive circuit is exposed to the outside, the cooling is relatively good and the temperature can be kept within a predetermined temperature rise range.

According to a tenth aspect of the present invention, in the light emitting unit according to the ninth aspect, the driving circuit is disposed on the front side of the LED of the side light emitting portion.

In the present invention, the LED driving circuit is connected to the side light emitting portion L
Since it is disposed on the front side of the ED, the optical positional relationship with the reflector can be set as required and the temperature rise can be further reduced. In addition, it is preferable in terms of appearance that the substrate shape of the front light emitting unit is matched to the end surface shape of the side light emitting unit,
The present invention is not limited to this. For example, while the end face shape of the side face light emitting portion is polygonal, the substrate shape of the front face light emitting portion can be circular, and further, these are reversed. You can also.

According to an eleventh aspect of the present invention, in the light emitting unit according to any one of the first to eighth aspects, the LED driving circuit of the side light emitting unit is housed in the internal space formed by the side light emitting unit. Features.

According to the present invention, since the LED driving circuit of the side emission unit is disposed in the internal space of the side emission unit, the size of the light emitting unit can be reduced. In particular, when the number of LEDs used is reduced by effectively arranging the LEDs as in claims 4 to 8, the amount of heat generated by the drive circuit is also reduced, so that the arrangement in the internal space is facilitated.

According to a twelfth aspect of the present invention, there is provided a lamp unit according to any one of the first to fourth aspects; a reflector housing the light emitting unit and having an open front; and mounted on the front of the reflector. And a light-transmitting front cover.

In the lamp unit of the present invention, the entire lamp unit can be removably mounted in a lamp such as a signal lamp, so that the entire unit can be replaced, and maintenance of the lamp is easy. Becomes

According to a thirteenth aspect of the present invention, there is provided a lighting unit according to any one of the fifth to eighth aspects, wherein the light emitting unit emits light such that a front surface is opened and a predetermined position of the light emitting unit substantially coincides with a focal point. A reflector having a substantially paraboloidal shape for accommodating the unit, and a transparent front cover mounted on a front surface of the reflector are provided.

The present invention has a desired light distribution characteristic similar to that of an incandescent lamp as a light source by aligning a predetermined position of the light emitting unit with a substantially focal point of a reflector having a substantially paraboloid of revolution. Can be done.

A lamp unit according to a fourteenth aspect of the present invention is the lamp unit according to the twelfth or thirteenth aspect, wherein the reflector includes a facet.

According to the present invention, by forming facets on the reflector, light distribution control is facilitated, the efficiency of the device is improved, and the appearance from the front is improved.

According to a fifteenth aspect of the present invention, in the lamp unit of the fourteenth aspect, the facet is formed radially from a central portion of the reflector.

According to the present invention, by specifying the configuration of the facet, an even better effect can be exhibited than the thirteenth invention.

According to a sixteenth aspect of the present invention, in the lamp unit according to any one of the twelfth to fifteenth aspects, the transparent front cover is provided with a plurality of divided lenses on the inner surface. It is characterized by:

When an LED having a narrow-angle light distribution characteristic is used as the light emitting unit for the front light emitting unit and the side light emitting unit, uneven brightness is likely to occur due to individual LEDs on the cover surface. By forming a lens which is divided into the above, it is possible to eliminate or reduce luminance unevenness.

In the lamp unit according to the seventeenth aspect of the present invention, in the lamp unit according to any one of the twelfth to fifteenth aspects, the transparent front cover is provided with a concave lens in a region facing the front light emitting portion of the light emitting unit. It is characterized in that a plurality of divided lenses are arranged in other areas.

The central portion of the transparent front cover facing the front light-emitting portion tends to have a higher luminance. However, according to the present invention, since the concave lens is provided in the above-mentioned opposing region, the luminance of the opposing region is reduced. The light is dispersed to other areas. In addition, since the other regions are configured in the same manner as in the preceding section, the luminance uniformity of the entire front cover can be improved, and the luminance unevenness can be reduced.

The light-emitting unit according to the eighteenth aspect of the present invention is a light-emitting unit comprising: a substantially flat substrate; an LED element; micro-reflecting means for reflecting light emitted from the LED element to form predetermined light distribution characteristics;
And a plurality of LEDs having optical axes arranged in a direction perpendicular to the plane of the substrate, comprising a sealing means for integrating the D element and the micro-reflecting means in a gas-tight and light-guide manner. .

The present invention provides a flat light-emitting unit, which simplifies the structure and realizes a compact and thin lamp unit and signal lamp. That is, the substrate on which the plurality of LEDs are mounted is substantially flat. The substrate need not be perfectly flat, but may be slightly convex or concave. The plane of the substrate having such a gentle curved surface is the plane when the peripheral edge of the substrate is placed on a plane.

Each LED has a predetermined light distribution characteristic as a light emitting unit in advance. for that reason,
The LED includes a micro-reflecting unit that reflects light emitted from the LED element. The micro-reflecting means is set so as to reflect the light generated from the LED element at a wide angle as much as possible. If an example of the arrangement of the LED element and the minute reflecting means is shown, the light emitting surface of the LED element is directed to the back side, and a minute reflecting surface having a rotational quadratic surface shape is arranged opposite to the light emitting surface, and both are arranged. An LED can be obtained by sealing with a transparent synthetic resin. The minute reflecting surface can be formed by molding a small reflecting surface shape using a synthetic resin, and then vapor-depositing a high-reflectance metal such as aluminum or silver on the expected reflecting surface portion.

Incidentally, a lens-shaped LED generally used in the prior art is formed by molding an LED element with a transparent synthetic resin.
This is a structure in which a lens is formed on the front surface of the ED element. The light distribution characteristic of this lens-shaped LED generally emits a considerably narrow beam. That is, it has a peak in the optical axis direction and has an axially symmetric light distribution characteristic, so that the light distribution of the LED itself is far from the desired light distribution for a lamp.
Using such a lens-shaped LED, L
In order to obtain a desired light distribution by mounting the ED, it is necessary to synthesize a required light distribution by using a very large number of LEDs and inclining the optical axes of the LEDs in different directions. A configuration in which this inclination is different is not suitable for mass production. Further, the use of a large number of LEDs raises the problem that the amount of heat generated increases and the amount of light emission decreases.

On the other hand, in the present invention, the LED
Since a desired light distribution characteristic is given in advance as a single unit as a light emitting unit, if each LED is mounted on a substrate with its optical axis aligned in a direction perpendicular to the plane of the substrate, the desired light distribution characteristic is obtained. A light emitting unit can be obtained.

Accordingly, it is possible to provide an inexpensive light emitting unit which is thin, has a simple structure, and is inexpensive.

A lamp unit according to a nineteenth aspect of the present invention provides a unit body having a box shape with an open front surface; a front cover disposed at a front open portion of the unit body;
2. The device according to claim 1, wherein the D is faced to the unit body.
And a light-emitting unit according to item 8.

In the present invention, the unit main body is allowed to have an arbitrary shape such as a circle or a quadrangle when viewed from the front. Suitable materials such as metal and synthetic resin can be used.

As the front cover, an appropriate one such as glass or synthetic resin can be used. Further, it may be either transparent or light diffusing.

Thus, the present invention provides a lamp unit suitable for the light emitting unit according to claim 18, and the lamp unit can be made thin.

A lamp unit according to a twentieth aspect of the present invention is the lamp unit according to the nineteenth aspect, further comprising a light emitting unit driving circuit disposed behind the light emitting unit in the unit body. Features.

The drive circuit may be fixed to the back of the light emitting unit in advance, or the drive circuit and the LED of the light emitting unit are connected before the light emitting unit is fixed to the unit main body and the light emitting unit is attached before mounting the light emitting unit. You may make it attach to. When the drive circuit is fixed to the light emitting unit in advance, the necessary wiring between them can be performed.

Thus, in the present invention, since the LED driving circuit is disposed in the unit main body behind the board, the lamp unit is also functionally integrated, and the lamp unit is integrated with the signal lamp. It is suitable for replacing the entire unit. For this reason, a lamp unit excellent in maintainability can be provided.

A lamp unit according to a twenty-first aspect of the present invention is the lamp unit according to the nineteenth or twentieth aspect, wherein the unit body has a peripheral step near the open end thereof, and a light emitting unit substrate is provided on the peripheral step. Further, the light emitting unit and the front cover are fixed by overlapping and locking the peripheral portions of the front cover, and by further winding the open end.
The present invention provides a mechanically integrated structure of a lamp unit. That is, a peripheral step is formed near the open end of the unit body, the peripheral edges of the substrate and the front cover are overlapped and locked on the peripheral step, and the open end is fixed by winding, so that the structure is simple and the manufacturing is simple. Is also easy. By interposing a packing between the front cover and the board and / or between the front cover and the unit body as required, a waterproof structure can be obtained. Wiring between the unit main body and the signal lamp is appropriately performed, but it is easy to perform waterproof wiring as necessary.

A signal lamp according to a twenty-second aspect of the present invention is a signal lamp main body having a reflector and a transparent cover disposed on the front side of the reflector; and a detachably mounted inside the signal lamp main body. And a light-emitting unit according to any one of (1) to (11).

In the present invention, maintenance can be performed by replacing only the light emitting unit like a conventional signal lamp.

According to a twenty-third aspect of the present invention, there is provided a signal lamp main body; and the lamp unit according to any one of the twelfth to seventeenth and nineteenth to twenty-first aspects detachably mounted in the signal lamp main body. It is characterized by having.

In the present invention, maintenance can be performed by replacing the entire lamp unit.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional end view showing a first embodiment of a light emitting unit and a signal lamp unit according to the present invention.

FIG. 2 is an enlarged front view of the light emitting unit.

In each of the figures, reference numeral 1 denotes a light emitting unit, 2 denotes a reflector, and 3 denotes a front cover. These constitute a signal lamp unit 4.

First, the light emitting unit will be described.

The light emitting unit 1 has a side light emitting section 11, a front light emitting section 12, and a base 13 as main components. The side emission unit 11 is configured by arranging a plurality of LED modules 11a in a cylindrical shape. Each LED module 1
1a is configured by mounting a plurality of LEDs 11a2 on a flat substrate 11a1. In this embodiment, six LEDs
The modules are arranged in a hexagonal cylindrical shape around a frame (not shown) to form a side emission unit 11. An LED drive circuit 14 is provided at the front end of the side surface light emitting unit 11. The swan type was used for the base 13.

The front light emitting section 12 is formed by mounting a plurality of LEDs 12a2 on a circular substrate 12a1. The driving circuit of the LED 12a2 of the front light emitting unit 12 is housed inside the side light emitting unit.

Next, the lamp unit will be described.

The reflector 2 is provided so as to surround the light emitting unit 1, and a front cover 3 is provided on the front surface thereof. The reflector 2 has a rotation 2 such as a paraboloid of revolution or a spheroid.
It is designed so that the next curved surface is deformed as necessary so that its focal point is located near each LED of the side light emitting unit 11, that is, the focal point is formed in a cylindrical shape. In order to realize this, the reflector 2 is mainly located on the right side in the drawing, that is, the area 2a facing the LED on the base 13 side is the LE 2
The radiating light of D is formed so as to be mainly reflected in a direction diverging with respect to the optical axis. In the figure, the region 2b facing the LED on the left side, that is, on the front side, is the L
The ED is formed so as to mainly reflect the emitted light in the same direction. Further, the region 2c facing the LED located in the middle is formed so as to mainly reflect the radiated light of the LED in the same direction.

The front cover 3 is colorless and transparent. The material is a synthetic resin, but may be glass. Further, a photocatalytic film (not shown) made of a photocatalyst such as anatase type titanium oxide is formed on the front surface of the front cover 3.

The operation of the present embodiment will be described. Light from the side light emitting unit 11 of the light emitting unit 1 mainly enters the reflector 2 and is controlled by the reflector 2 for light distribution. On the contrary,
The light from the front light emitting section 12 is mainly radiated directly forward, and acts so that the whole of the lamp unit 4 looks uniform when viewed as a whole. Since the front cover 3 is colorless and transparent, the false lighting phenomenon caused by West Japan Sun does not occur. In addition, since the photocatalyst film is formed on the front surface of the front cover 3, even if the cover 3 is contaminated with smoke or the like, the photocatalyst is activated by ultraviolet rays in sunlight and organic substances are oxidized and reduced.
Dirt is decomposed and removed. Therefore, it is effective in enduring long-term use and reducing maintenance costs.

Next, the relationship between the amount of light emitted from the side light emitting portion 11 and the amount of light emitted from the front light emitting portion 12 will be described.

FIG. 3 is a light distribution characteristic diagram in the first embodiment of the signal lamp unit according to the present invention when the light emission amount ratio between the side light emitting portion and the front light emitting portion is changed.

In the figure, the horizontal axis indicates the angle (゜), and the vertical axis indicates the luminous intensity (cd). When the light emission amount of the side light emitting unit 11 is A and the light emission amount of the front light emitting unit 12 is B, the values of the light emission amount ratio A / (A + B) are 0.2, 0.5, 0.7, and 0.9. The results measured for the case of し た were plotted. As shown in FIG. 3, if the light emission amount ratio is too large, the viewing angle becomes too wide and the brightness as a signal lamp becomes insufficient. On the other hand, the brightness decreases as the emission ratio decreases. However, the viewing angle is too narrow, and when looking at the signal light from a distance,
The center is bright and the view is not good. Therefore,
0.2 or more is desirable.

FIG. 4 is a graph showing the relationship between the light emission ratio of the lamp unit according to the present invention and the appliance efficiency.

In the figure, the horizontal axis represents the light emission amount ratio A / (A +
B), and the vertical axis indicates instrument efficiency (%), respectively. As is clear from this figure, it can be understood that the smaller the light emission amount ratio, the higher the appliance efficiency, and the range of 0.2 to 0.7 is preferable also from the viewpoint of the appliance efficiency.

FIG. 5 is a light distribution curve diagram showing an example of a wide-angle light distribution of an LED.

The wide-angle light distribution shown in FIG.

FIG. 6 is a light distribution curve diagram showing an example of a narrow-angle light distribution of an LED.

Although the narrow-angle light distribution shown in this figure is a light distribution having a relatively wide spread, it is suitable for the side light emitting section 11.

FIG. 7 is a light distribution curve diagram showing another example of a narrow-angle light distribution of an LED.

In the narrow-angle light distribution shown in this figure, the light distribution is set to be narrower, and by using it for the side light emitting section 11, it is possible to further increase the efficiency of the apparatus.
It is more preferable than that of

FIG. 8 is a front view of a side light emitting section showing a light emitting unit according to a second embodiment of the present invention.

The side emission section 112 of this embodiment is the same as that shown in FIG. 1 in that six LED modules 112a are arranged in a hexagon, but each LED 112a2
Are optimized in optimizing the arrangement state. That is, the LEDs 112a2 are radially arranged around the virtual center axis L of the light emitting unit. In order to facilitate such an arrangement of the LEDs 112a2, L
The two lead wires of the ED can be aligned in the direction of the central axis L.

When the light emitting unit in which the LEDs 112a2 are radially arranged as described above is disposed so that the central axis of the light emitting unit is aligned with the optical axis of the reflector (not shown), the light emitting unit can be disposed in a plane perpendicular to the optical axis. Optically, the same reflection function as a point light source can be performed. That is, even if the light-emitting unit has an expanse in size, the LED 1 is placed on the reflector as if a point light source is disposed on the reflector.
Light emission of 12a2 is incident. This ensures that the reflected light of the reflector is similar to that of a point light source.
In particular, the above effect is more remarkable for an LED having a narrow-angle light distribution.

FIG. 9 is a sectional view showing a third embodiment of the light emitting unit and a second embodiment of the lamp unit according to the present invention.

The same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

First, the light emitting unit 143 will be described.

In this embodiment, the LED 1 of the side light emitting portion 113 is used.
The arrangement of 13a2 is optimized in a plane including the central axis L of the light emitting unit. That is, the LEDs are arranged so as to emit a main beam in a radiation direction centered on a predetermined position F on the central axis. In order to facilitate such an arrangement, the two lead wires of the LED 113a2 can be arranged so as to straddle the central axis L.

Next, the lamp unit 42 will be described.

The reflector 22 has a paraboloid of revolution, and its focal point is set at the position F in FIG. The front cover 32 provided on the front surface of the reflector 22 is made of transparent plastics. The predetermined position F of the light emitting unit 143 matches the focal position of the reflector 22 as described above.

Since the LEDs 113a2 of the side surface light emitting portion 113 of the light emitting unit 143 are radially arranged around the predetermined position F on the central axis L, most of the light emission is located at the focal point. Like the light emitted from the light source, the light enters the reflector 22 and is reflected. Therefore, the reflected light efficiently forms a predetermined light distribution.

As described above, the LED 1 of the side light emitting portion 113
By arranging 13a2, a remarkable improvement in the efficiency of the device can be obtained, and if the light emission amount is made equal, the number of LEDs used can be obviously reduced. LED on the contrary
If the quantity used is not changed, the amount of light emission can be significantly increased. Further, it becomes extremely easy to obtain a desired light distribution.

FIG. 10 is a sectional view showing a fourth embodiment of the light emitting unit and a third embodiment of the lamp unit according to the present invention.

In the figure, the same parts as those in FIG. 9 are denoted by the same reference numerals, and description thereof will be omitted.

In the present embodiment, the arrangement of the LEDs 114a2 of the side surface light emitting portion 114 of the light emitting unit 144 is designed to maintain the efficiency of the device high and to improve the workability of mounting. That is, from the predetermined position F on the central axis L to the central axis L
The LED 114a2 ′ in the first region formed between the straight line A at right angles to the straight line A and the straight lines B and B ′ respectively forming 10 ° in front and back from the straight line A with the predetermined position as the center is Are arranged so as to emit the main beam at right angles. Then, the LEDs 114 in the remaining second area
a2 is arranged so as to emit a main beam in a radiation direction centering on a predetermined position F.

Since the first area is within 10 degrees from the predetermined position, the efficiency of the apparatus is improved as compared with the embodiment of FIG. There is no substantial adverse effect because the ratio of non-operation is small.

On the other hand, since the remaining second region has a large angle with respect to the predetermined position, if the main beam is perpendicular to the central axis, the deviation from the radiation direction becomes large, and the efficiency of the apparatus is not improved. The ratio cannot be ignored. Therefore, in the present embodiment, since the LEDs in the second area are aligned with the main beam in the radiation direction at the predetermined position F, the LED in this area improves the appliance efficiency. As a whole, it is possible to provide a lamp unit with sufficient performance for practical use with respect to the light emission amount and light distribution, that is, light distribution characteristics of the present embodiment.

Therefore, the LEDs in the first region can be arranged with two lead wires along the center line L. That is, it is easy for the LEDs in the first region to align the main beam in the radiation direction about the central axis L as in the embodiment of FIG.

FIG. 11 is a graph showing the light distribution characteristics of the lamp unit shown in FIG.

In the figure, the solid line indicates this embodiment. The dotted line shows the light distribution characteristics of the comparative lamp unit. In addition,
In the light emitting unit of the lamp unit of the embodiment used for the measurement, the LED in the first region of the side light emitting unit has the configuration of the embodiment of FIG. Also, the lighting unit for comparison is
Side emission units are arranged in the same manner as in FIG. In both units, the number of LEDs and other specifications were the same.

Thus, in the case of the present embodiment, the left and right
It can be understood that the luminous intensity within ゜ is significantly improved. Also good in light distribution.

FIG. 12 is a sectional view showing a fifth embodiment of the light emitting unit and a fourth embodiment of the lamp unit according to the present invention.

In the figure, the same parts as those in FIG. 9 are denoted by the same reference numerals, and description thereof will be omitted.

In the present embodiment, the arrangement of the LEDs 115a2 of the side light emitting unit 115 of the light emitting unit 145 is maintained at a high degree of fixture efficiency, and the mounting workability can be further improved as compared with the embodiment of FIG. That is, the LED 11 is located only in an area formed between a straight line A perpendicular to the center axis L and straight lines C and C ′ respectively forming an angle of 30 ° before and after the straight line A about a predetermined position.
5a2 is provided. In each of these LEDs, the main beam is in a direction perpendicular to the central axis. In other words, a certain angle is formed with respect to the radiation direction centered on the predetermined position F.

Thus, in the present embodiment, since it is not necessary to tilt the LED 115a2 of the side emission section 115, mounting is extremely easy. Also, within the above angle range, the light emission amount is smaller than in the case of FIG. 9, but the reduction can be limited to an allowable range. Light distribution is not significantly affected.

FIG. 13 is a partially cutaway sectional end view showing a fifth embodiment of the signal lamp unit of the present invention.

In the figure, the same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

This embodiment is the same as the first embodiment except that the configuration of the reflector 2 'is different. The reflectors 2 ′ are arranged from the respective portions of the side surface light emitting portion 11 of the light emitting unit 1 to the respective regions 2 a ′, 2 b ′, 2 c 1 ′, and 2 c 2 ′ of the reflector facing each other.
Is configured to be reflected in a direction parallel to the optical axis.

FIG. 14 is a partially cutaway cross-sectional end view showing a sixth embodiment of the signal lamp unit of the present invention.

In the figure, the same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

In the present embodiment, the structure of the reflector 2 ″ is different.
That is, each area 2a ", 2b", 2c "of the reflector 2"
Is directed in a direction intersecting the optical axis of the reflector 2 ″.

FIG. 15 is a front view showing one embodiment of the reflector in the lamp unit of the present invention. That is,
The facets 2d are formed on the reflecting surface radially from the center of the reflector, so that the reflected light is satisfactorily scattered to improve the appearance of the lamp unit.

FIG. 16 is a front view showing another embodiment of the reflector in the lamp unit of the present invention.

In the present embodiment, the facet 2d is replaced with a facet 2d 'obtained by adding a coaxial circular facet as compared with FIG. 15, so that the reflected light is further scattered.

FIG. 17 shows a seventh embodiment of the lamp unit according to the present invention.
It is a partially notched cross-sectional end view showing the embodiment.

FIG. 18 is a front view of the front cover in FIG.

In FIG. 17, the same portions as those in FIG. 13 are denoted by the same reference numerals, and description thereof will be omitted.

In this embodiment, the structure of the front cover 33 is changed. That is, the front cover 33 has a plurality of divided lenses 33a on its inner surface.

Thus, the plurality of divided lenses act so as to reduce the uneven brightness caused by the light emission of each LED of the front light emitting section 12 and the side light emitting section 11.

FIG. 19 shows an eighth embodiment of the lamp unit according to the present invention.
It is a partially notched cross-sectional end view showing the embodiment.

FIG. 20 is a front view of the front cover in FIG.

In FIG. 19, the same parts as those in FIG. 17 are denoted by the same reference numerals, and description thereof will be omitted.

In the present embodiment, the configuration of the front cover 34 is changed. That is, a concave lens 34b is provided at a portion of the front cover 34 facing the front light emitting section 12, and a lens 34a having a plurality of other portions is provided.

If the concave lens 34b is not provided, the brightness of the front light-emitting portion 12 becomes too high compared to other portions and the uniformity of the brightness of the entire front cover is reduced. However, the brightness is suppressed by the concave lens 34b and the other portions are reduced. And the uniformity of luminance can be improved for the entire front cover.
The other portions reduce the luminance unevenness due to the individual LEDs as in FIG.

FIG. 21 is a conceptual diagram showing an embodiment of the signal lamp of the present invention.

In the figure, 11 is a signal lamp main body, and 4 is a lamp unit. This embodiment is a road traffic light, and includes three light units 4 for emitting blue, yellow and red lights.
For each of the above embodiments, those described in the above embodiments can be used.
If necessary, maintenance can be performed by replacing only the light emitting unit in the lamp unit.

Thus, compatibility between the conventional incandescent lamp and the light emitting unit of the present invention can be provided.

FIG. 22 is a partially cutaway front view showing a ninth embodiment of the light emitting unit and the lamp unit according to the present invention.

FIG. 23 is a sectional view of the same.

In the figure, 23 is a substrate, 24 is an LED,
25 is a unit main body, 26 is a front cover, and 27 is a drive circuit.

As the substrate 23, a printed wiring board can be used and has a circular flat plate shape.

The LEDs 24 have the configuration described later, and a plurality of LEDs 24 are disposed on the front surface of the substrate 23 with their optical axes perpendicular to the plane of the substrate.

The unit main body 25 is formed in a circular shallow box shape, and has an open front surface. And the front open end 25a
Is formed in the vicinity of.

The front cover 26 is formed by molding a transparent synthetic resin into a circular shape in conformity with the shape of the unit body 25. However, in FIG. 22, since the drawing is omitted, the inside cannot be seen through, but it is actually possible to see through.

The drive circuit 27 drives each LED 24, and is composed of, for example, a switching power supply. The drive circuit 27 is provided behind the substrate 23 inside the unit main body 25.

Then, the substrate 23 and the front cover 26
Are fixed to the unit main body 25 by being locked to the peripheral step portion 25b of the unit main body 25 in a stacked state, and by tightening the front open end 25a of the unit main body 25.

FIG. 24 is a front view of an LED used in the ninth embodiment of the present invention.

FIG. 25 is a side view of the same.

FIG. 26 is a sectional view of the same.

In each of the figures, reference numeral 24a denotes an LED element;
b1 and 24b2 are lead frames, 24c is a reflection surface, 2
4d is a transparent synthetic resin, and 24e is a base.

The LED element 24a is connected to the lead frame 24.
It is mounted on the lower surface of b1 with the light emission direction facing downward in FIG.

The lead frames 24b1 and 24b2 are integrally formed when the base 24e is formed of a synthetic resin. Wiring is provided from the LED element 24a to the lead frame 24b2.

When molding the base 24e, the LED element 24
A curved surface is formed, which is regulated so that the positional relationship between the light emitting portion a and the light emitting portion a becomes predetermined. Then, a silver deposition film is formed on the curved surface to complete the reflection surface.

The transparent synthetic resin 24d is filled in the concave portion in the curved surface to seal the LED element 24a in an airtight manner and light guide.

Thus, the light distribution of the LED 24 is designed to have a desired light distribution characteristic as a lamp unit or a signal lamp.

FIG. 27 is a light distribution characteristic curve diagram showing a light distribution characteristic standard of a traffic signal light.

In the figure, the horizontal axis indicates the angle in the left-right direction about the signal lamp, and the vertical axis indicates the altitude (cd). Curve A is 0 ° elevation and curve B is -1.
Curve C is a light distribution curve at -20 degrees, curve D is a light distribution curve at -30 degrees, and curve E is a light distribution curve at -40 degrees. The ninth aspect of the present invention
According to the embodiment, in order to make the light emitting unit and the lamp unit conform to FIG. 27, the light distribution characteristics of each LED 24 are formed so as to satisfy the light distribution standard of FIG.

[0160]

According to the first to eleventh and eighteenth aspects of the present invention, it is possible to provide a light emitting unit that obtains desired light distribution characteristics by using an LED as a light source.

According to the first aspect of the present invention, in addition to the provision of the side light-emitting portion and the front light-emitting portion, the side light-emitting portion is constituted by arranging a plurality of LED modules in a cylindrical shape, so that a desired light distribution characteristic is obtained. And a light-emitting unit having a simple structure can be provided.

According to the second aspect of the present invention, in addition, since the LED of the side light emitting portion is of a narrow angle light distribution type, the light emission is efficiently reflected by the reflector to increase the luminous intensity of the lamp. And light distribution control becomes easy. In addition, since the wide-angle light distribution type LED is used as the LED of the front light emitting unit, the appearance of the front surface is improved, and the luminance of the front light emitting unit is suppressed to improve the uniformity of the luminance of the entire lamp.

According to the third aspect of the present invention, a light emitting unit which is sufficiently bright and has high appliance efficiency is provided by setting the light emission amount ratio between the side light emitting portion and the front light emitting portion within a predetermined value range. be able to.

According to the fourth aspect of the present invention, it is possible to provide a light emitting unit in which the LEDs of the side light emitting portions are arranged to be efficiently reflected by the reflector in a plane perpendicular to the central axis.

According to the fifth aspect of the present invention, in addition, in the plane including the central axis, each of the LEDs of the side-surface light-emitting portion has an optimal light incident direction to the reflector in order to obtain a required light distribution. Since the light-emitting units are arranged in a light-emitting unit, a light-emitting unit capable of obtaining desired light distribution characteristics can be provided.

According to the invention of claim 6, in addition to the above, the light emitting unit in which the LEDs of the side light emitting portions are arranged in a plane including the central axis so as to obtain substantially desired light distribution characteristics and to be easily mounted. Can be provided.

According to the seventh aspect of the present invention, in addition to obtaining the desired light distribution characteristics, the LEDs of the side-surface light emitting portions can be obtained in a plane including the central axis and in a plane orthogonal to the central axis, that is, in a three-dimensional space. A light-emitting unit arranged so as to be easily mounted can be provided.

According to the eighth aspect of the present invention, it is possible to provide a light emitting unit in which the LED of the side light emitting portion can obtain substantially desired light distribution characteristics and is extremely easy to mount.

According to the ninth aspect of the present invention, in addition, since the LED driving circuit is mounted adjacent to the side light emitting portion, the diameter can be made compatible with other light sources such as incandescent lamps. In addition, a light-emitting unit with good cooling can be provided.

According to the tenth aspect of the present invention, since the driving circuit is arranged adjacent to the front side, the light distribution control is easy, the cooling is easy, and the light emitting unit compatible with other light sources is provided. can do.

According to the eleventh aspect of the present invention, in addition, since the LED driving circuit is housed in the internal space formed by the side light emitting portion, the driving circuit can be provided with a compact light emitting unit.

Claims 12 to 17 and 19 to 2
According to the first aspect of the invention, it is possible to provide a lamp unit that obtains desired light distribution characteristics by using an LED as a light source.

According to the twelfth aspect of the invention, since the transparent cover is additionally used, it is possible to prevent a false lighting phenomenon caused by the sunshine and the like, and it is possible to replace the lamp unit with the lamp unit such as a signal lamp unit. A lamp unit that can be provided can be provided.

According to the thirteenth aspect of the present invention, it is possible to provide a lamp unit capable of exhibiting the desired functions of the light emitting units of the fourth to eighth aspects.

According to the fourteenth aspect of the present invention, it is possible to provide a lamp unit that scatters the reflected light and makes the appearance better because the reflector forms facets.

According to the fifteenth aspect of the present invention, it is possible to provide a lamp unit with a further improved appearance.

According to the sixteenth aspect of the present invention, since a plurality of divided lenses are disposed on the transparent front cover, it is possible to provide a lamp unit in which the unevenness in brightness due to individual LEDs is reduced. it can.

According to the seventeenth aspect of the invention, in addition, since the concave lens is disposed opposite to the front light emitting portion of the light emitting unit, the brightness of the front light emitting portion is reduced and the uniformity of the luminance of the entire cover is improved. A lamp unit can be provided.

According to the eighteenth aspect of the present invention, it is possible to provide a light-emitting unit having a simple light-emitting unit and a desired light distribution characteristic by using a substantially flat substrate.

According to the nineteenth aspect of the present invention, it is possible to provide a lamp unit having a simple structure with a substantially flat substrate and having desired light distribution characteristics.

According to the twentieth aspect of the present invention, in addition, by disposing the driving circuit behind a substantially flat substrate, it is possible to provide a lamp unit having a simple configuration and easy handling.

According to the twenty-first aspect of the present invention, it is possible to provide a lamp unit in which a light emitting unit and a front cover are integrally wound around a unit body.

According to the twenty-second aspect of the present invention, it is possible to provide a signal lamp capable of performing maintenance by replacing the light emitting unit having the effects of the first to eleventh aspects.

According to the twenty-third aspect of the present invention, it is possible to provide a signal lamp capable of performing maintenance by replacing the lamp unit having the effects of the twelfth to seventeenth and nineteenth aspects.

[Brief description of the drawings]

FIG. 1 is a sectional end view showing a first embodiment of a light emitting unit and a lamp unit of the present invention.

FIG. 2 is an enlarged front view of the light emitting unit.

FIG. 3 is a light distribution characteristic diagram when the light emission ratio of the side light emitting portion and the front light emitting portion is changed in the first embodiment of the lamp unit of the present invention.

FIG. 4 is a graph showing the relationship between the light emission ratio of the lamp unit according to the present invention and the appliance efficiency.

FIG. 5 is a light distribution curve diagram showing an example of a wide-angle light distribution of an LED.

FIG. 6 is a light distribution curve diagram showing an example of a narrow-angle light distribution of an LED.

FIG. 7 is a light distribution curve diagram showing an example of another narrow-angle light distribution of an LED.

FIG. 8 is a front view of a side light emitting section showing a light emitting unit according to a second embodiment of the present invention.

FIG. 9 is a sectional view showing a third embodiment of the light emitting unit and a second embodiment of the lamp unit according to the present invention.

FIG. 10 is a cross-sectional view showing a fourth embodiment of the light emitting unit of the present invention and a third embodiment of the lamp unit.

11 is a graph showing light distribution characteristics of the lamp unit shown in FIG.

FIG. 12 is a cross-sectional view showing a fifth embodiment of the light emitting unit of the present invention and a fourth embodiment of the lamp unit.

FIG. 13 is a sectional view showing a fifth embodiment of the lamp unit of the present invention.

FIG. 14 is a partially cutaway sectional end view showing a sixth embodiment of the lamp unit of the present invention.

FIG. 15 is a front view showing one embodiment of a reflector in the lamp unit of the present invention.

FIG. 16 is a front view showing another embodiment of the reflector in the lamp unit of the present invention.

FIG. 17 is a partially cutaway end view showing a seventh embodiment of the lamp unit of the present invention.

FIG. 18 is a front view of the front cover in FIG. 17;

FIG. 19 is a partially cutaway sectional end view showing an eighth embodiment of the lamp unit of the present invention.

FIG. 20 is a front view of the front cover in FIG. 19;

FIG. 21 is a conceptual diagram showing an embodiment of the signal light device of the present invention.

FIG. 22 is a partially cutaway front view showing a ninth embodiment of the light emitting unit and the lamp unit according to the present invention.

FIG. 23 is a sectional view of the same.

FIG. 24 shows an LED used in the ninth embodiment of the present invention.
Front view of

FIG. 25 is a side view of the same.

FIG. 26 is a sectional view of the same.

FIG. 27 is a light distribution characteristic curve diagram showing a light distribution characteristic standard of a traffic light;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Light-emitting unit 2 Reflector 3 ... Front cover 4 ... Lamp unit 11 ... Side-surface light-emitting part 11a ... LED module 11a2 ... Board 11a2 ... LED 12 ... Front light-emitting part 12a1 ... Board 12a2 ... LED 13 ... Base

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location H01L 33/00 H01L 33/00 L

Claims (23)

[Claims] 1. An LED having a plurality of LEDs mounted on a substrate.
A side-surface light-emitting unit in which a plurality of ED modules are arranged in a cylindrical shape; a front-surface light-emitting unit configured by mounting a plurality of LEDs on a substrate and disposed in front of the side-surface light-emitting unit; And a base disposed on the light emitting unit. 2. A side light emitting unit having a plurality of narrow-angle light distribution LEDs disposed on a side surface thereof; and a front light emitting unit having a plurality of wide-angle light distribution LEDs disposed thereon. A light-emitting unit characterized by the above-mentioned. 3. A plurality of LEDs are arranged on the front surface, the amount of light emission is A, and a plurality of LEDs are arranged on the side surface, and the amount of light emission B satisfies the following condition. A light emitting unit comprising: 0.2 ≦ B / (A + B) ≦ 0.7. 4. The LED of the side light emitting section is arranged so as to emit a main beam in a substantially radial direction about the center axis in a plane orthogonal to the center axis of the side light emitting section. The light emitting unit according to any one of claims 1 to 3, wherein the light emitting unit is a light emitting unit. 5. The LEDs of the side emission section are arranged so as to emit a main beam in a substantially radial direction about a predetermined position on the center axis within a plane including the center axis of the side emission section. The light emitting unit according to any one of claims 1 to 4, wherein: 6. The LED of the side-surface light-emitting unit is arranged such that, within a plane including the center axis of the side-surface light-emitting unit, a straight line drawn substantially perpendicularly to the center axis from a predetermined position on the center axis and back and forth around a predetermined position. In a first region formed between the straight lines drawn at an angle of 10 °, the main beam is disposed so as to emit the main beam in a direction substantially perpendicular to the central axis. The light emitting unit according to any one of claims 1 to 4, wherein the light emitting units are arranged so as to emit the main beam in a substantially radial direction about a predetermined position in the second region exceeding the predetermined position. 7. The LED of the side-surface light-emitting unit is arranged such that, within a plane including the center axis of the side-surface light-emitting unit, a straight line drawn substantially perpendicularly to the center axis from a predetermined position on the center axis and back and forth around a predetermined position. In a first region formed between a straight line drawn at an angle of 10 ° and a main beam radiated in a direction substantially perpendicular to the central axis in a first region, and exceeding 10 ° In the second region, the main beam is radiated in a substantially radial direction about the predetermined position, and in a plane perpendicular to the central axis, the main beam is radiated in a substantially radial direction about the central axis. The light emitting unit according to any one of claims 1 to 4, wherein the light emitting units are arranged in a matrix. 8. The LED of the side light emitting unit is arranged such that, within a plane including the central axis of the side light emitting unit, a straight line drawn from a predetermined position on the central axis at right angles to the central axis and a predetermined position as a center, respectively. The main beam is arranged so as to emit the main beam only in a region formed between the straight line drawn at an angle of 30 ° and the direction substantially perpendicular to the central axis. Item 5. The light emitting unit according to any one of Items 1 to 4. 9. The light emitting unit according to claim 1, wherein the LED driving circuit of the side light emitting unit is mounted on a substrate of the side light emitting unit so as to be exposed to the outside. 10. An LED driving circuit, comprising:
10. The device according to claim 9, wherein the device is disposed on the front side.
A light emitting unit as described. 11. The light emitting unit according to claim 1, wherein an LED driving circuit of the side light emitting unit is housed in an internal space formed by the side light emitting unit. 12. A light-emitting unit according to claim 1, wherein the light-emitting unit is housed and a reflector having an open front surface; and a transparent front cover mounted on the front surface of the reflector. A lighting unit, comprising: a lighting unit; 13. A light-emitting unit according to claim 5, wherein the light-emitting unit is housed such that the front surface is open and a predetermined position of the light-emitting unit is substantially in focus. A lighting unit, comprising: a reflector having a shape; and a transparent front cover mounted on a front surface of the reflector. 14. The lamp unit according to claim 12, wherein the reflector has a facet. 15. The lamp unit according to claim 14, wherein the facets are formed radially from a central portion of the reflector. 16. The transparent front cover is provided with a plurality of divided lenses on its inner surface.
16. The lamp unit according to any one of 2 to 15. 17. The transparent front cover is characterized in that a concave lens is arranged in a region facing the front light emitting portion of the light emitting unit, and a plurality of divided lenses are arranged in other regions. A lamp unit according to any one of claims 12 to 15. 18. A substantially flat substrate; an LED element and an LED.
A micro-reflecting means for reflecting the light emitted from the element to form a predetermined light distribution characteristic; and a sealing means for integrating the LED element and the micro-reflecting means in a gas-tight and light-guide manner, in a direction perpendicular to the plane of the substrate. LEDs with optical axes arranged in a row
And a light emitting unit comprising: 19. A box-shaped unit main body having an open front surface;
A front cover disposed at a front opening of the unit body;
19. The lighting unit according to claim 18, wherein the light-emitting unit is housed in the unit body such that the LED faces the front cover. 20. The lamp unit according to claim 19, further comprising a light-emitting unit drive circuit disposed behind the light-emitting unit in the unit main body. 21. The unit body has a peripheral step near the open end thereof, the substrate of the light emitting unit and the peripheral edge of the front cover are overlapped and locked on the peripheral step, and the open end is further tightened to emit light. 21. The lamp unit according to claim 19, wherein the unit and the front cover are fixed. 22. A signal lamp main body provided with a reflector and a transparent cover disposed on the front side of the reflector, and detachably mounted in the signal lamp main body. And a light emitting unit. 23. A signal lamp main unit; and a lamp unit according to any one of claims 12 to 17 and 19 to 21 removably mounted in the signal lamp main unit. Signal lights to do.