WO2014049952A1

WO2014049952A1 - Light source for lighting, and lighting apparatus

Info

Publication number: WO2014049952A1
Application number: PCT/JP2013/005023
Authority: WO
Inventors: 康一中村; 雅人松本; 高橋　健治
Original assignee: パナソニック株式会社
Priority date: 2012-09-26
Filing date: 2013-08-26
Publication date: 2014-04-03
Also published as: JPWO2014049952A1; JP6179772B2; CN203686680U

Abstract

A straight tube LED lamp (1) is provided with: an LED module (10) that is provided inside of a long housing; a translucent cover (20), which is a part of the long housing, and which covers the LED module (10); a base (30), which is another part of the long housing, and which has the LED module (10) provided on the surface; a circuit case (60), which is a part of the long housing, and which is a base (30) end portion in the longitudinal direction of the base, said circuit case being disposed by being covered with the translucent cover (20); and a ferrule (40), which is in contact with the circuit case (60), and which is provided in the longitudinal direction of the long housing. The circuit case (60) has a reflecting surface for outputting, toward the outer side of the translucent cover (20), light outputted from the LED module (10), said reflecting surface being tilted from the longitudinal direction of the base (30).

Description

Illumination light source and illumination device

The present invention relates to an illumination light source and an illumination device, for example, a straight tube lamp having a light emitting element such as a light emitting diode (LED) and an illumination device including the same.

LED is expected to be a new light source in various lamps such as fluorescent lamps and incandescent lamps, which are conventionally known because of its high efficiency and long life, and research and development of lamps using LED (LED lamps) is being promoted. ing.

As an LED lamp, a straight tube type LED lamp (straight tube type LED lamp) that replaces a straight tube type fluorescent lamp having electrode coils at both ends, or a light bulb type LED that replaces a light bulb type fluorescent lamp or an incandescent bulb. There are lamps (bulb-shaped LED lamps) and the like. For example, Patent Document 1 discloses a conventional straight tube LED lamp.

JP 2009-43447 A

In a straight tube type LED lamp, for example, a long casing has a structure divided into two along its longitudinal direction, and a long semicircular section with an outer surface exposed to the outside of the lamp. An LED module having a plurality of LEDs mounted thereon is placed on the base. A translucent cover having a long semi-circular cross section is fixed to the base so as to cover the LED module. In the straight tube type LED lamp on which the LED module is mounted, heat is generated from the LED itself due to the self-emission of the LED and the temperature rises, whereby the light output of the LED is lowered and the lifetime is shortened. As a countermeasure, efficient heat dissipation from the back of the base is realized by using the base of the straight tube LED lamp as a heat sink.

On the other hand, lighting devices including straight tube LED lamps require a lighting circuit such as a converter circuit and a rectifier circuit for converting electric power received from an external commercial power source into predetermined DC power. The lighting circuit is generally arranged on the side of the luminaire. However, from the viewpoint of the compatibility of the straight tube LED lamp and the design freedom of the lighting device, the lighting circuit is included in the straight tube LED lamp. The form to incorporate is mentioned. However, when the lighting circuit is incorporated in a straight tube type LED lamp, the lighting circuit needs to be arranged so as not to block the LED emission, so that the lighting circuit is provided in the base as an example. For example, a structure to be inserted into the formed cavity is mentioned. However, in the case of the above structure, since the cavity provided in the base is an air layer, a heat transfer path for heat generated in the LED cannot be secured due to the presence of the air layer, and efficient heat dissipation becomes difficult.

On the other hand, the base without the cavity has high heat dissipation, but there is no space for housing the lighting circuit. In this case, the structure which inserts the said lighting circuit inside the nozzle | cap | die arrange | positioned at the edge part of a straight tube | pipe type LED lamp can be considered. However, in the case of this configuration, in order to insert the lighting circuit inside the base, it is necessary to lengthen the base and increase the internal volume of the base. Therefore, the length of the LED module is reduced, and the straight tube type The brightness at the end of the LED lamp is lowered.

The present invention has been made to solve the above-described problems, and an object thereof is to provide an illumination light source and an illumination device that ensure excellent heat dissipation and the brightness of the end of the straight tube lamp does not decrease. .

In order to achieve the above object, one aspect of an illumination light source according to the present invention includes a light emitting module having a light emitting element, a substrate on which the light emitting element is provided, and a long shape covering the surface of the substrate. The translucent cover, a long base on which the light emitting module is provided on the surface, and an end portion in the longitudinal direction of the translucent cover, which is covered with the translucent cover, A case containing a member for lighting the light emitting module; and a base provided at an end portion in a longitudinal direction of the translucent cover, wherein the case transmits the light emitted from the light emitting module. A reflection surface inclined from the surface of the base for emitting light toward the outside of the cover is provided.

Further, in one aspect of the illumination light source according to the present invention, a distance in a direction perpendicular to the surface of the base between the reflection surface and the inner surface of the translucent cover is at a longitudinal center of the translucent cover. It may be bigger as it gets closer.

Further, in one aspect of the illumination light source according to the present invention, the reflective surface of the case may be a curved surface having a convex shape.

Further, in one aspect of the illumination light source according to the present invention, the member housed in the case may be a circuit member that converts electric power supplied from an external power source into predetermined DC power.

In the aspect of the illumination light source according to the present invention, the case may be made of an insulating material.

Further, in one aspect of the illumination light source according to the present invention, the case may be disposed at both ends in the longitudinal direction of the translucent cover.

Also, in one aspect of the illumination light source according to the present invention, the translucent cover is a cut-out cylindrical member having a main opening in which a part of the long cylinder is cut out along the length direction. The base may hold the translucent cover so as to close the main opening.

Further, an aspect of the illumination device according to the present invention is characterized by including the illumination light source described above.

According to the present invention, the reflective surface of the case that houses the lighting member provided at the end of the straight tube LED lamp allows the light emitted from the light emitting module to the end of the straight tube LED lamp to be transmitted through the translucent cover. Since it radiates | emits toward the outer side, the brightness | luminance fall of a straight tube | pipe type LED lamp edge part can be prevented, ensuring the heat dissipation of a base.

FIG. 1 is a perspective view showing a configuration of a straight tube LED lamp according to Embodiment 1 of the present invention. FIG. 2 is an exploded perspective view of the straight tube LED lamp according to Embodiment 1 of the present invention. FIG. 3 is a five-side view of the circuit case according to the first embodiment. FIG. 4A is a diagram for explaining an inclination effect of the reflection surface of the circuit case according to the first embodiment. FIG. 4B is a diagram for explaining the curved surface effect of the reflection surface of the circuit case according to the first embodiment. FIG. 5 is a perspective view showing a configuration of a straight tube LED lamp according to a modification of the first embodiment of the present invention in which lighting circuits are divided and arranged. 6A is a schematic top view of an end portion of a straight tube LED lamp including a circuit case according to Embodiment 1. FIG. 6B is a schematic top view of an end portion of a straight tube LED lamp including a circuit case according to a modification of Embodiment 1. FIG. FIG. 7 is a schematic perspective view of a lighting apparatus according to Embodiment 2 of the present invention. FIG. 8A is a base rear view showing a first modification of the heat dissipation structure of the straight tube LED lamp according to the present invention. FIG. 8B is a base rear view showing a second modification of the heat dissipation structure of the straight tube LED lamp according to the present invention.

Hereinafter, an illumination light source and an illumination device according to an embodiment of the present invention will be described with reference to the drawings. Note that each of the embodiments described below shows a preferred specific example of the present invention. Therefore, the numerical values, shapes, materials, components, arrangement positions and connection forms of the components shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements.

Each figure is a schematic diagram and is not necessarily shown strictly. Moreover, in each figure, the same code | symbol is attached | subjected about the same structural member.

In the following embodiments, a straight tube LED lamp which is an embodiment of the illumination light source of the present invention and a lighting device using the straight tube LED lamp will be exemplified.

(Embodiment 1)
First, a straight tube LED lamp 1 according to Embodiment 1 of the present invention will be described. The straight tube LED lamp 1 according to the present embodiment is a straight tube LED lamp that replaces a conventional straight tube fluorescent lamp. Further, the straight tube LED lamp 1 according to the present embodiment has a split structure in which a straight tubular casing is separated into a translucent member and a heat sink.

[Entire configuration of the lamp]
First, the configuration of the straight tube LED lamp 1 according to Embodiment 1 of the present invention will be described with reference to FIGS.

FIG. 1 is a perspective view showing a configuration of a straight tube LED lamp according to Embodiment 1 of the present invention. 2 is an exploded perspective view of the straight tube LED lamp according to the first embodiment of the present invention, and FIG. 3 is a front view and a side view of the circuit case according to the first embodiment of the present invention. . 1 is a perspective view for clearly showing the structure of the straight tube LED lamp 1, the LED module 10 and the circuit case 60 may not be visible from the outside of the translucent cover 20.

As shown in FIGS. 1 and 2, the straight tube LED lamp 1 is a long straight tube lamp used as an alternative to a conventional straight tube fluorescent lamp (straight tube fluorescent lamp). The translucent cover 20, the base 30, the LED module 10, the

caps

40 and 50, the circuit case 60, and the lighting circuit 70 are provided. In the straight tube LED lamp 1, the base 30, the

caps

40 and 50, the circuit case 60, and the translucent cover 20 constitute a long and cylindrical lamp housing (envelope). That is, by connecting the translucent cover 20 and the base 30, a tubular casing having openings at both ends is configured as an outer member (insertion tube). A circuit case 60 and a lighting circuit 70 are provided at the end in the longitudinal direction (Y-axis direction) of the casing, and a pair of

caps

40 and 50 are provided at both ends. Further, the LED module 10 and the like are accommodated in the casing. The straight tube LED lamp 1 is supported by the lighting fixture by attaching the

caps

40 and 50 to the socket of the lighting fixture. The structure of the circuit case 60 that is the main part of the present invention will be described later.

Hereinafter, each component of the straight tube LED lamp 1 will be described in detail.

[Translucent cover]
The translucent cover 20 is a long cover member constituting the outer surface of the lamp housing, and protects members provided on the base 30, that is, the LED module 10 and the lighting circuit. The translucent cover 20 includes a cutout cylindrical member having a main opening 21 formed by cutting out a part of a long cylinder along the long direction (tube axis direction), for example, a substantially semi-cylindrical member. Is done.

The translucent cover 20 is made of a material that transmits light emitted from the LED module 10 to the outside of the lamp. The translucent cover 20 is made of, for example, a transparent resin material or glass made of acrylic or the like, and can be formed by resin molding a desired transparent resin material.

As the translucent cover 20, for example, a straight pipe (glass pipe) made of soda-lime glass having silica (SiO ₂ ) of 70 to 72 [%], or a straight pipe made of a resin material such as polycarbonate (plastic) Tube).

The translucent cover 20 may include a light diffusing unit having a light diffusing function for diffusing light from the LED module 10. Thereby, the light emitted from the LED module 10 can be diffused when passing through the translucent cover 20. Examples of the light diffusion portion include a light diffusion sheet or a light diffusion film formed on at least one of the inner surface and the outer surface of the translucent cover 20. Specifically, a milky white light diffusing film formed by attaching a resin or white pigment containing a light diffusing material (fine particles) such as silica or calcium carbonate to at least one of the inner surface and the outer surface of the translucent cover 20. There is. As other light diffusion portions, a lens structure provided at least either inside or outside of the translucent cover 20, or a concave or convex portion formed on at least one of the inner surface and the outer surface of the translucent cover 20. There is a department. For example, by printing a dot pattern on at least one of the inner surface and the outer surface of the translucent cover 20 or by processing a part of the translucent cover 20, a light diffusion function (light (A diffusion part) can be provided. Moreover, the light-transmitting cover 20 itself can be molded using a resin material or the like in which a light diffusing material is dispersed, so that the light-transmitting cover 20 can have a light diffusing function (light diffusing portion).

[Base]
As shown in FIGS. 1 and 2, the base 30 is a support base for holding (supporting) the LED module 10, and is translucent so as to close the main opening 21 of the translucent cover 20. It is integrated with the cover 20. An inner part of the base 30 on the side of the translucent cover 20 is a plate-like placement portion 31 on which the LED module 10 is placed. In this Embodiment, the mounting surface of the mounting part 31 which is the surface of the base 30 is an elongate rectangular plane.

In addition, the base 30 functions as a heat sink that dissipates heat generated in the LED module 10. Accordingly, the back surface of the base 30 is exposed toward the outside of the straight tube LED lamp 1. Specifically, a plurality of radiating fins 32 are provided as heat radiating portions on the outer side which is the back surface of the mounting surface of the base 30. The heat radiation fin 32 is exposed toward the outside of the straight tube LED lamp 1 and is provided so as to protrude outward from the mounting portion 31. A plurality of the radiation fins 32 are arranged in parallel along the longitudinal direction (Y-axis direction) of the base 30. In the present specification, the longitudinal direction of the base 30 refers to a direction parallel to the long side when the surface of the base 30 is viewed in plan, and the short direction of the base 30 is the width of the base 30. The direction parallel to the short side when the surface is viewed in plan.

Further, at both ends of the base 30 in the short direction, there are provided step portions to which the edges on both sides in the circumferential direction of the translucent cover 20 are engaged. The translucent cover 20 and the base 30 can be engaged by sliding the translucent cover 20 on the base 30 in the longitudinal direction or by fitting the translucent cover 20 from above the base 30.

The base 30 is preferably made of a high thermal conductivity material such as metal, and is an extruded material made of aluminum in the present embodiment. In addition, the base 30 may be comprised with resin. In this case, it is preferable to use a resin material having a high thermal conductivity.

In addition, you may adhere | attach the translucent cover 20 and the base 30 with an adhesive agent as needed.

[LED module]
The LED module 10 is a light source of the straight tube LED lamp 1 and is fixed to the mounting portion 31 on the surface of the base 30 so as to be covered by the translucent cover 20. There are various fixing methods to the mounting portion 31 such as claw, slide, silicon, rivet, caulking, etc. in addition to fixing with an adhesive or a screw.

The LED module 10 is a surface-mounted (SMD: Surface Mount Device) type light emitting module as shown in FIG. 2, and is a line light source that emits light in a line shape. The LED module 10 includes a mounting substrate 82, a plurality of LED elements 88 mounted in a line on the mounting substrate 82, wiring 84, and electrode terminals 86. In other words, the LED module 10 is provided inside a long casing composed of the translucent cover 20 and the base 30, and is mounted with the LED element 88 as a light emitting element and the LED element 88 on the surface. A light emitting module including a substrate 82.

The mounting substrate 82 is an LED mounting substrate for mounting the LED element 88, at least the surface of which is made of an insulating material, and is, for example, a long rectangular substrate. As the mounting substrate 82, for example, a glass epoxy substrate (CEM-3, FR-4, etc.), a substrate made of paper phenol or paper epoxy (FR-1, etc.), a flexible flexible substrate made of polyimide, etc. Alternatively, a metal base substrate can be used. As the metal base substrate, for example, an aluminum alloy substrate, an iron alloy substrate, or a copper alloy substrate having an insulating film formed on the surface can be used. The front and back surfaces of the mounting substrate 82 are rectangular when viewed in plan.

The mounting substrate 82 has a longitudinal direction (Y-axis direction) parallel to the longitudinal direction of the base 30, and a lateral direction (X-axis direction) orthogonal to the longitudinal direction is parallel to the lateral direction of the base 30. As described above, it is disposed on the surface of the base 30.

Each of the plurality of LED elements 88 is an example of a light emitting element, and is directly mounted on the surface of the mounting substrate 82. The plurality of LED elements 88 are arranged in a line (in a straight line) along the longitudinal direction of the mounting substrate 82.

The LED element 88 is a so-called SMD type light emitting element in which an LED chip and a phosphor are packaged. For example, the LED element 88 is a white LED element that emits white light. The LED element 88 includes a package, an LED mounted on the bottom surface of the recess of the package, a sealing member that is a phosphor-containing resin that fills the recess of the package and seals the LED, a metal wiring, and the like. .

The package is a container molded with a non-translucent resin (white resin or the like), and includes an inverted frustoconical recess (cavity). The inner side surface of the recess is an inclined surface and is configured to reflect light from the LED upward. Note that the package may be light-transmitting, and light may be emitted in a wide range from the side surface of the package.

Each LED is an example of a light-emitting element and is a bare chip that emits monochromatic visible light, and is die-bonded to the bottom surface of the recess of the package and mounted on the mounting substrate 82 by a die attach material (die bond material). As each LED, for example, a blue light emitting LED chip that emits blue light can be used. As the blue light emitting LED chip, for example, a gallium nitride based semiconductor light emitting element having a central wavelength of 440 nm to 470 nm made of an InGaN based material can be used.

In a plurality of LEDs, a p-side electrode and an n-side electrode for supplying current are formed on the upper surface of the chip, and each of the p-side electrode and the n-side electrode and the wiring 84 are wire-bonded.

The sealing member is a phosphor-containing resin containing a phosphor that is a light wavelength converter, and converts the wavelength of the light from the LED and simultaneously seals all the LEDs on the mounting substrate 82 to protect the LED. To do. The sealing member is filled in the recess of the package, and is sealed up to the opening surface of the recess. For example, when the LED is a blue LED, a phosphor-containing resin obtained by dispersing YAG (yttrium, aluminum, garnet) -based yellow phosphor particles in a silicon resin can be used as the sealing member. In this case, since the yellow phosphor particles are excited by the blue light of the blue LED to emit yellow light, white light is emitted from the sealing member by the excited yellow light and the blue light of the blue LED. The sealing member may contain a light diffusing material such as silica.

The wiring 84 is a metal wiring made of tungsten (W), copper (Cu), or the like. The surface of the wiring 84 is exposed to electrically connect the LED elements 88 to each other and to electrically connect the LED elements 88 and the electrode terminals 86. For the purpose of connection, a pattern is formed in a predetermined shape.

The electrode terminal 86 is a power supply / reception unit that receives DC power from the lighting circuit 70 and supplies DC power to the LED. The surface of the electrode terminal 86 is exposed and is electrically connected to the wiring 84. When the DC voltage received by the electrode terminal 86 is supplied to the LED, the LED emits light, and desired light is emitted from the LED. Note that the two electrode terminals 86 are biased toward one long side of the mounting substrate 82 with respect to the sealing member.

In addition, the number of the LED modules 10 mounted on the base 30 may be either one or a plurality. When a plurality of LED modules 10 are used, the LED modules 10 are arranged in a line along the longitudinal direction of the base 30.

[Lighting circuit]
FIG. 2 is an external perspective view of the lighting circuit 70. The lighting circuit 70 is an LED lighting circuit that converts AC power input from an external power source into DC power and outputs the power, and includes a circuit board 71 and a predetermined circuit element group 72 mounted on the circuit board 71. . That is, the lighting circuit 70 is a circuit member that is accommodated in the circuit case 60 and converts electric power supplied from an external power source into predetermined DC power.

The circuit board 71 is a printed board on which a predetermined wiring pattern for wiring the mounted electronic components is formed, for example, a glass epoxy board, a ceramic board, a flexible flexible board (FPC), or A metal substrate having excellent heat dissipation can be used.

The circuit element group 72 includes a plurality of circuit elements for lighting the LED elements 88 of the LED module 10. In the present embodiment, the circuit element group 72 includes a rectifier circuit element and a fuse element. The rectifier circuit element is a diode bridge circuit composed of four diodes, and full-wave rectifies the input AC power.

The circuit elements constituting the circuit element group 72 are electrically connected by a wiring pattern formed on the circuit board 71. In addition, as a circuit element of the circuit element group 72, a resistor, a capacitor, a coil, a diode, a transistor, or the like is used as necessary.

The lighting circuit 70 includes an input socket that receives AC power from a pair of power supply pins 41 provided on the power receiving base 40 and an output socket that outputs DC power for lighting the LED element 88 of the LED module 10. With. An input connector terminal electrically connected to the pair of power supply pins 41 is inserted into the input socket via a lead wire. In addition, an output connector terminal electrically connected to the electrode terminal 86 on the mounting substrate 82 is inserted into the output socket via a lead wire. The input socket and the output socket are electrically connected to the circuit elements of the circuit element group 72 by a wiring pattern formed on the circuit board 71.

In addition, the lighting circuit 70 is provided with a connector for passing power supplied to the LED module 10 and a circuit for causing the LED module 10 to emit light. Further, the straight tube LED lamp 1 in the present embodiment employs a one-side power feeding method in which power is fed to the LED module 10 only from the base 40. That is, the straight tube LED lamp 1 receives power from a lighting fixture or the like only from the base 40.

With the above circuit configuration, a predetermined DC voltage is applied to the LED element 88 of the LED module 10 via the electrode terminal 86.

Note that the lighting circuit 70 does not necessarily have a converter function for converting AC power as described above into DC power. It may be a circuit having a function of rectifying electric power that has already been subjected to AC-DC conversion in a lighting fixture to which the straight tube LED lamp 1 is attached. In this case, the circuit element group 72 includes, for example, a diode bridge circuit (rectifier circuit) that rectifies input DC power, a fuse element, and the like. The circuit element group 72 having a function of rectifying may include a resistor, a capacitor, a coil, a diode, a transistor, or the like as necessary.

[Circuit case]
As shown in FIG. 2, the circuit case 60 in which the lighting circuit 70 is accommodated is disposed at the end of the base 30 in the longitudinal direction. At least a part of the circuit case 60 is covered with the translucent cover 20 together with the LED module 10. The circuit case 60 is disposed between the base 40 and the base 30 in the longitudinal direction of the long casing, and is fixed to the base 40 and the base 30 by a pair of screws 43. That is, the circuit case 60 is disposed at an end portion in the longitudinal direction (Y-axis direction) of the translucent cover 20 and houses the lighting circuit 70 for lighting the LED module 10 covered with the translucent cover 20. This is the case.

Here, the circuit case 60 has a reflective surface inclined from the surface of the mounting portion 31 of the base 30 for emitting the light emitted from the LED module 10 toward the outside of the translucent cover 20. Yes. With this reflecting surface structure, even if the circuit case 60 that does not emit light is disposed at the end of the straight tube LED lamp 1, the light emitted from the LED module 10 is emitted toward the outside of the translucent cover 20. The brightness at the end of the straight tube LED lamp 1 is not lowered. Furthermore, the heat radiation efficiency from the back of the base can be improved by comparing the lighting circuit with a straight tube LED lamp in which the lighting circuit is provided in a cavity secured inside the base.

In addition, it is preferable that the circuit case 60 is comprised with the material which has a high reflectance with respect to the light radiate | emitted from the LED module 10. FIG. Furthermore, since the circuit case 60 accommodates the circuit element group 72 and the wiring pattern, the circuit case 60 is preferably made of an insulating material. An example of a material having high light reflectivity while ensuring insulation is polycarbonate. Thereby, the brightness | luminance fall of a straight tube | pipe type LED lamp edge part can be suppressed, preventing the malfunction generation | occurrence | production of a circuit short circuit.

FIG. 3 is a five-side view of the circuit case according to the first embodiment. As shown in the side view shown in the figure, the reflection surface of the circuit case 60 is inclined from the longitudinal direction of the base 30, and the base between the reflection surface of the circuit case 60 and the inner surface of the translucent cover 20. The distance in the direction perpendicular to the surface 30 (Z-axis direction) is larger as it approaches the center in the longitudinal direction of the elongated casing (in the positive Y-axis direction).

FIG. 4A is a diagram for explaining an inclination effect of the reflection surface of the circuit case according to the first embodiment. As shown in FIG. 4A, the light emitted from the LED element 88 in the longitudinal direction of the long casing is efficiently converted out of the light emitted from the LED element 88 by the inclined structure of the reflection surface of the circuit case 60. The light can be emitted toward the outside of the translucent cover 20.

Furthermore, as shown in FIG. 3, the reflection surface of the circuit case 60 is preferably a curved surface having a convex shape.

FIG. 4B is a diagram for explaining the curved surface effect of the reflecting surface of the circuit case according to the first embodiment. As shown in FIG. 4B, the curved surface structure of the reflection surface of the circuit case 60 allows the light emitted from the LED element 88 to be emitted in a wide range toward the outside of the translucent cover 20. .

The reflective surface of the circuit case 60 may be a plane inclined from the surface of the mounting portion 31 of the base 30. In this case, the isotropic curved surface effect as shown in FIG. 4B cannot be obtained, but the effect shown in FIG. 4A is achieved.

The length in the longitudinal direction of the long casing of the circuit case 60 having the above characteristics is preferably as short as possible. As a typical straight tube type LED lamp 1, for example, the outer diameter of the translucent cover 20 is 28 mmφ, the outer diameter of the base 40 is 30 mmφ, and the length of the long casing of the base 40 is 26 mm in the longitudinal direction. In this case, the length of the long casing of the circuit case 60 including the base 40 in the longitudinal direction is preferably within 70 mm. By ensuring the above dimensional relationship, a decrease in luminance at the end of the straight tube LED lamp 1 is effectively suppressed.

In addition, in order to shorten the length of the long casing of the circuit case 60 in the longitudinal direction, the circuit case may be disposed not only at one end in the longitudinal direction of the base 30 but also at both ends.

In the above embodiment, the single-side power supply method is described. However, when the wattage is advanced, it is assumed that the single-side power supply method is difficult to apply. To cope with higher wattage, as the lighting circuit becomes larger, a low-wattage circuit is arranged on the left and right with a double-sided power supply system, or the lighting circuit is divided into two on the left and right, and the divided lighting circuit Are preferably connected by base internal wiring.

FIG. 5 is a perspective view showing a configuration of a straight tube LED lamp in which lighting circuits are divided and arranged according to a modification of the first embodiment of the present invention. As shown in the figure, the straight tube LED lamp 3 includes a translucent cover 20, a base 30, an LED module 10, a pair of caps 40, and a pair of circuit cases 62. A circuit case 62 and a lighting circuit are provided at both ends in the longitudinal direction (Y-axis direction) of the casing formed by the translucent cover 20 and the base 30. Further, a pair of caps 40 are provided outside the circuit case 62 so as to cover the circuit case 62. The straight tube LED lamp 3 shown in FIG. 5 is, for example, of a high watt specification, and both sides of the lighting circuit for low watts distributed to the left and right circuit cases 62 in accordance with the increase in the size of the lighting circuit. The power supply method is adopted. Moreover, the lighting circuit for low watts may be distributed and arranged in the left and right circuit cases 62, and the divided lighting circuits may be connected by wiring passing through the inside of the base 30.

As described above, according to the straight-tube LED lamp 3 of the double-sided power feeding system according to the present embodiment, the LED element 88 can be disposed near the base 40 that is the end of the straight-tube LED lamp 3. It is possible to effectively prevent a decrease in luminance at the end of the LED lamp 3. As a form for realizing this, the lighting circuit 70 is divided and accommodated in two circuit cases 62, and the two circuit cases 62 are distributed and arranged at both ends of the straight tube LED lamp 3. This makes it possible to make the luminance distribution at both ends of the straight tube LED lamp 3 symmetrical.

[Base]
The base 40 is a power supply base for supplying power to the LED elements of the LED module 10. The base 40 is also a power receiving base that receives power for lighting the LED elements of the LED module 10 from an external power source of the straight tube LED lamp 1.

As shown in FIGS. 1 and 2, the base 40 is in contact with the circuit case 60, and covers one of the end portions in the longitudinal direction of the long casing composed of the translucent cover 20 and the base 30. It has a bottomed cylindrical shape. The base 40 in the present embodiment includes a base body made of a synthetic resin such as polybutylene terephthalate (PBT) and a pair of power receiving pins 41 that are a pair of power receiving connection terminals made of a metal material such as brass. The pair of power supply pins 41 are configured to protrude outward from the bottom of the base body. The power supply pin 41 is a pin that supplies power to turn on the LED element, and functions as a power reception pin that receives predetermined power from an external device such as a lighting fixture. For example, by attaching the base 40 to the socket of the lighting fixture, the pair of power supply pins 41 is in a state of receiving power from the power supply device built in the lighting fixture. The power supply pin 41 also functions as a connection terminal for detachably attaching to the socket of the lighting fixture. The base 40, the circuit case 60, and the base 30 are fixed by a pair of screws 43 and screw holes 42 in the longitudinal direction of the long casing.

The base 50 is a non-power supply base. That is, the base 50 has a function of attaching the straight tube LED lamp 1 to a lighting fixture.

As shown in FIGS. 1 and 2, the base 50 has a bottomed cylindrical shape that covers the other end in the longitudinal direction of the long casing composed of the translucent cover 20 and the base 30. It has become. The base 50 in the present embodiment includes a base body made of a synthetic resin such as PBT and a pair of non-power-feeding pins 51 made of a metal material such as brass. The pair of non-feeding pins 51 are configured to protrude outward from the bottom of the base body.

It should be noted that the base 50 may have a ground function. In this case, the non-power feeding pin 51 functions as a ground pin, and the base 30 is grounded via the lighting fixture by grounding the non-power feeding pin 51 and the base 30. The base 50 and the base 30 are fixed by a pair of screws 53 and screw holes 52 in the longitudinal direction of the elongated casing.

As described above, the straight tube LED lamp 1 employs a one-sided power feeding method, and the power for lighting the LED module 10 is a pair of electrodes provided only at one end of the straight tube LED lamp 1. Power is supplied from the power supply pin 41 via the lighting circuit 70.

As mentioned above, although the structure of the straight tube | pipe type LED lamp 1 which concerns on Embodiment 1 was demonstrated, the shape of the circuit case 60 is not restricted to the shape illustrated in FIG.

6A is a schematic top view of an end portion of a straight tube LED lamp including a circuit case according to Embodiment 1, and FIG. 6B is a straight tube LED including a circuit case according to a modification of Embodiment 1. It is the upper surface schematic of the edge part of a lamp | ramp.

As described above, the circuit case according to the present embodiment has a reflective surface inclined from the surface of the base 30, and the reflective surface is preferably a curved surface having a convex shape. When this shape is optimized, as shown in FIG. 6A, the circuit case 60 preferably has a shape that protrudes most at the center in the short direction of the base 30. On the other hand, the circuit case 61 according to the modification shown in FIG. 6B has a part of the recess that is retracted to the longitudinal end portion of the base 30 at the central portion in the short direction of the base 30. In addition, shapes other than the said recessed part in the front-end | tip of the circuit case 61 have the same situation as the circuit case 60 illustrated by FIG. 6A. Due to the shape of the recess at the tip of the circuit case 61, the LED element 88 can be arranged at the end in the longitudinal direction of the long casing. Therefore, the brightness | luminance fall of straight pipe | tube type LED lamp 1 edge part can be suppressed more effectively.

(Embodiment 2)
Next, the illuminating device 2 which concerns on Embodiment 2 of this invention is demonstrated using FIG.

FIG. 7 is a schematic perspective view of the lighting apparatus according to Embodiment 2 of the present invention. As shown in the figure, the lighting device 2 according to the present embodiment is a base light, and includes a straight tube LED lamp 1 and a lighting fixture 100.

The straight tube LED lamp 1 is a straight tube LED lamp 1 according to the first embodiment, and is used as a light source for illumination of the illumination device 2. In the present embodiment, two straight tube LED lamps 1 are used.

The lighting fixture 100 includes a pair of sockets 110 that are electrically connected to the straight tube LED lamp 1 and that holds the straight tube LED lamp 1 and a fixture main body 120 to which the socket 110 is attached. The instrument body 120 can be formed by, for example, pressing an aluminum steel plate. Moreover, the inner surface of the instrument main body 120 is a reflecting surface that reflects light emitted from the straight tube LED lamp 1 in a predetermined direction (for example, downward).

The lighting fixture 100 configured in this way is mounted on a ceiling or the like via a fixture. The lighting fixture 100 may incorporate a circuit for controlling the lighting of the straight tube LED lamp 1 or the like. Further, a cover member may be provided so as to cover the straight tube type LED lamp 1.

(Other)
As described above, the lamp and the illumination device according to the present invention have been described based on the embodiments, but the present invention is not limited to the above-described embodiments.

For example, in the above embodiment, the case disposed between the base 40 and the base 30 is exemplified as the circuit case 60 that accommodates the lighting circuit 70, but the case that accommodates a member different from the circuit element and the wiring. It may be.

Moreover, in the said embodiment, the heat radiating structure arrange | positioned at the back surface of the base 30 is the radiation fin 32 extended in the longitudinal direction of the elongate housing | casing comprised with the translucent cover 20 and the base 30. FIG. However, the heat dissipation structure is not limited to this. The heat dissipation structure of the straight tube LED lamp of the present invention may be the heat dissipation structure shown in FIG. 8A or 8B.

FIG. 8A is a rear view of the base showing a first modification of the heat dissipation structure of the straight tube LED lamp according to the present invention, and FIG. 8B is a second view of the heat dissipation structure of the straight tube LED lamp according to the present invention. It is a base rear view which shows the modification of this. FIG. 8A and FIG. 8B show the layout of the heat dissipating fins constituting the heat dissipating structure on the back surfaces of the base 33 and the base 34, respectively.

The heat dissipation structure shown in FIG. 8A is different from the heat dissipation structure including the heat dissipation fins 32 of the base 30 according to Embodiment 1 in that the heatsink fins extending in the longitudinal direction of the base (Y-axis direction) have a predetermined interval. The structure is divided by. According to the above structure, external cold air can be flowed into the radiating fin from the divided portion of the radiating fin, so that effective air convection is performed and more efficient exhaust heat is realized.

In addition, the heat dissipation structure shown in FIG. 8B is configured by a plurality of heat dissipation fins 32 in which the heat dissipation structure on the back surface of the base 30 according to Embodiment 1 extends in the longitudinal direction (Y-axis direction) of the base. On the other hand, it is composed of a plurality of radiating fins extending in the short direction of the base (X-axis direction). In addition, each of the plurality of radiating fins has a structure that is divided at a predetermined interval. With the above structure, the external cold air can flow into the heat radiating fins from the short side of the base, and the external cold air can flow into the heat radiating fins through the divided portions of the heat radiating fins. Therefore, effective air convection is performed, and more efficient exhaust heat is realized. Note that the heat dissipation structure shown in FIG. 8B may be a structure in which a plurality of heat dissipation fins extending in the short direction (X-axis direction) of the base are not divided.

Further, for example, in the above-described embodiment, a single-side power feeding method that feeds power to all the LEDs in the housing from only one side of the base 40 or the base 50 is adopted, but both the bases on both sides use the G13 base and L A double-sided power feeding method such as a shape base (a base having a flat power receiving pin bent in an L shape) may be used. In this case, the power receiving pin on one side and the power receiving pin on the other side may be configured as one pin, or the power receiving pin on one side and the power receiving pin on the other side may be configured to receive power from both sides as a pair of power receiving pins. I do not care. In addition, the pair of power receiving pins and the ground pins are not limited to the rod-shaped metal, and may be configured by a flat metal or the like.

From the aspect of the power feeding method described above, for example, the straight tube LED lamp according to the present invention includes the following variations. That is, a one-sided power feeding method in which one side is composed of an L-shaped base and a base having a ground pin on the other side, a two-sided power feeding method in which both sides are composed of an L-shaped base, a one-sided power feeding method in which both sides are composed of an L-shaped base, and a G13 base And a one-sided power feeding system composed of a G13 base.

In the above embodiment, the LED module 10 is an SMD type LED module using the packaged LED element 88, but is not limited thereto. For example, a COB (Chip On Board) type LED module having a configuration in which a plurality of LED chips are directly mounted on the mounting substrate 82 and the plurality of LED chips are collectively sealed with a phosphor-containing resin may be used.

In the above embodiment, the LED module 10 (LED element 88) is configured to emit white light by the blue LED chip and the yellow phosphor, but is not limited thereto. For example, a phosphor-containing resin containing a red phosphor and a green phosphor may be used and combined with this and a blue LED chip to emit white light. Moreover, you may use the LED chip which light-emits colors other than blue, for example, using the ultraviolet LED chip which emits the ultraviolet light which is shorter wavelength than the blue light which a blue LED chip emits, mainly by ultraviolet light You may comprise so that white light may be emitted by the blue phosphor particles, green phosphor particles, and red phosphor particles that are excited to emit blue light, red light, and green light.

In the above embodiment, the LED is exemplified as the light emitting element. However, a semiconductor light emitting element such as a semiconductor laser, an EL element such as an organic EL (Electro Luminescence) or an inorganic EL, or other solid light emitting element is used. Also good.

The present invention also includes a cylindrical translucent cover without a notch (main opening 21) seen in the translucent cover 20 and a base that is arranged in the translucent cover. The present invention can also be applied to a straight tube type LED lamp provided with a long casing. That is, the circuit case in this aspect is disposed between the base and the base that covers the cylindrical translucent cover at the end, and at least a part of the circuit case is a translucent cover together with the LED module. Covered. Even in the case of this structure, a decrease in luminance at the end of the straight tube LED lamp is suppressed.

In addition, it is realized by arbitrarily combining the components and functions in each embodiment without departing from the scope of the present invention, or a form obtained by subjecting each embodiment to various modifications conceived by those skilled in the art. Forms are also included in the present invention.

Moreover, in the said embodiment, the end surface (circumferential end surface) of the edge part of the translucent cover fitted to the groove | channel of a base is continuous in a longitudinal direction, forms one plane, and translucency The end of the cover is fitted in the groove of the base continuously in the longitudinal direction. By the way, since the resin-made translucent cover has distortion (during molding), when the translucent cover is slid into the base, the translucent cover is cracked or chipped due to stress from the base. To do. In particular, when the length of the translucent cover in the longitudinal direction is long as in the case of type 110, this problem becomes significant because many distortions are inherent during resin molding. Further, the shape of the translucent cover when viewed from the long direction exceeds a semicircle, and the main opening of the translucent cover is 180 around the central axis of the translucent cover when viewed from the long direction. When it is continuously formed in a range smaller than 0 °, the translucent cover is particularly distorted. On the other hand, the stress which a translucent cover receives from a base can be relieve | moderated by making small the contact area in the fitting part of the groove | channel of a base and the edge part of a translucent cover. As a configuration for realizing this, the end of the translucent cover is intermittently formed in a claw shape in the longitudinal direction, and the unevenness whose height changes in the circumferential direction of the translucent cover is the end of the translucent cover. The structure formed in the end surface of this can be considered. In this configuration, the convex portion (claw portion) of the end face of the end portion of the translucent cover fits into the groove of the base and contacts the surface of the base groove, but the end face of the end of the translucent cover The recess does not fit into the groove of the base and does not contact the surface of the groove of the base. As another configuration, a configuration in which the width of the groove of the base is constant in the longitudinal direction and the thickness of the end portion of the translucent cover varies in the longitudinal direction is conceivable. In this configuration, the thick part at the end of the translucent cover fits into the groove of the base and contacts the surface of the groove of the base, but the thin part at the end of the translucent cover A gap is formed between the thin part at the end and the groove on the base without fitting (contacting) with the groove. As another configuration, a configuration in which the thickness of the end portion of the translucent cover is constant in the longitudinal direction and the width (opening width) of the groove of the base varies in the longitudinal direction can be considered. In this configuration, the narrow part of the groove of the base is fitted to the end of the translucent cover and comes into contact with the end of the translucent cover, but the wide part of the base is wide. A gap is formed between the wide portion of the groove of the base and the end of the translucent cover without being fitted to the end of the transparent cover.

DESCRIPTION OF

SYMBOLS

1, 3 Straight tube | pipe type LED lamp 2 Illuminating device 10 LED module 20 Translucent cover 21

Main opening

30, 33, 34 Base 31 Mounting part 32

Radiation fin

40, 50 Base 41

Feeding pin

42, 52

Screw hole

43, 53 Screw 51

Non-feeding pin

60, 61, 62 Circuit case 70 Lighting circuit 71 Circuit board 72 Circuit element group 82 Mounting board 84 Wiring 86 Electrode terminal 88 LED element 100 Lighting fixture 110 Socket 120 Instrument body

Claims

A light emitting module having a light emitting element and a substrate provided with the light emitting element on the surface;
An elongated translucent cover covering the surface of the substrate;
An elongated base on which the light emitting module is provided on the surface;
A case that is disposed at an end portion in the longitudinal direction of the translucent cover and that is covered with the translucent cover and that houses a member for lighting the light emitting module;
A base provided at an end in the longitudinal direction of the translucent cover;
The light source for illumination, wherein the case has a reflecting surface inclined from the surface of the base for emitting the light emitted from the light emitting module toward the outside of the translucent cover.
The light source for illumination according to claim 1, wherein a distance between the reflecting surface and the inner surface of the translucent cover in a direction perpendicular to the surface of the base is larger as approaching the center in the longitudinal direction of the translucent cover.
The illumination light source according to claim 2, wherein the reflection surface of the case is a curved surface having a convex shape.
The light source for illumination according to claim 1, wherein the member housed in the case is a circuit member that converts electric power supplied from an external power source into predetermined DC power.
The illumination light source according to claim 1, wherein the case is made of an insulating material.
The illumination light source according to claim 1, wherein the case is disposed at both ends of the translucent cover in a longitudinal direction.
The translucent cover is a cutout cylindrical member having a main opening in which a part of the long cylinder is cut out along the lengthwise direction,
The illumination light source according to any one of claims 1 to 6, wherein the base holds the translucent cover so as to close the main opening.
An illumination device comprising the illumination light source according to any one of claims 1 to 7.