CN204284979U - Lighting device - Google Patents

Abstract

The utility model provides an illuminating device. The lighting device according to the embodiment includes: a first light-emitting module including a semiconductor light-emitting element, a first wavelength conversion layer disposed on the semiconductor light-emitting element, and a second wavelength conversion layer disposed on the semiconductor light-emitting element; A light-emitting module comprising the semiconductor light-emitting element, the first wavelength conversion layer, and the second wavelength conversion layer, and the arrangement of the first wavelength conversion layer and the second wavelength conversion layer is similar to that of the first light-emitting The module has symmetry; the appliance body is provided with a light source installation part on the lower surface, and the first light-emitting module and the second light-emitting module are alternately installed in the light source installation part; The light emitted by the light emitting module and the second light emitting module is controlled. The lighting device provided by the utility model can improve the color mixing performance.

Description

lighting device

technical field

The embodiment of the utility model relates to a lighting device.

Background technique

In recent years, for example, in lighting devices such as down lights, light-emitting modules (modules) that use light-emitting diodes (Light Emitting Diodes, LEDs) as light sources and are mounted on substrates are sometimes used. A semiconductor light-emitting element that is equal in length and consumes less power than a light bulb. In this lighting device, for example, a plurality of light emitting modules that emit white light using blue LEDs and yellow phosphors are arranged along the circumferential direction.

In such a lighting device, for example, when using a light emitting module that uses a plurality of phosphors to emit light of different light colors, depending on the arrangement of the light emitting modules, color difference may occur, resulting in a decrease in color mixing performance.

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2011-204655

Utility model content

[Problems to be solved by the utility model]

The purpose of this embodiment is to provide a lighting device capable of improving color mixing performance.

[Technical means to solve the problem]

The lighting device according to the embodiment includes: a first light-emitting module including a semiconductor light-emitting element, a first wavelength conversion layer disposed on the semiconductor light-emitting element, and a second wavelength conversion layer disposed on the semiconductor light-emitting element; A light-emitting module comprising the semiconductor light-emitting element, the first wavelength conversion layer, and the second wavelength conversion layer, and the arrangement of the first wavelength conversion layer and the second wavelength conversion layer is similar to that of the first light-emitting The module has symmetry; the appliance body is provided with a light source installation part on the lower surface, and the first light-emitting module and the second light-emitting module are alternately installed in the light source installation part; The light emitted by the light-emitting module and the second light-emitting module is controlled.

The first light-emitting modules and the second light-emitting modules are arranged alternately in an annular shape.

The first light-emitting modules and the second light-emitting modules are arranged alternately in a straight line.

There are a plurality of third light-emitting modules whose installation directions can be changed, and the plurality of third light-emitting modules are installed in the light source installation part while changing the installation directions alternately.

(effect of utility model)

According to the embodiment, it is possible to provide a lighting device capable of improving color mixing performance.

Description of drawings

FIG. 1 is a cross-sectional view of a lighting device according to an embodiment.

2( a ) and FIG. 2( b ) are diagrams showing the configuration of light emitting modules in which light source arrangements are different.

Fig. 3 is a bottom view of a state in which a light-emitting module is arranged in a fixture body of a lighting device.

Fig. 4 is a cross-sectional view of a light emitting module.

FIG. 5( a ) and FIG. 5( b ) are diagrams for explaining a conventional photometric distribution and a photometric distribution according to the present embodiment.

Fig. 6 is a diagram illustrating another example of a light emitting module.

Fig. 7 is a diagram for explaining another example of the lighting device.

[explanation of the symbol]

11, 11a: Lighting device

12: Appliance body

13a, 13b, 13c: light emitting modules

14: reflector

15: Translucent cover

16: Reflection frame

21, 21a: Substrate part

22: Barrel

23: Containment

24: Irradiation opening

25: Lighting module configuration department

26: Depression

29: wiring hole

30: cooling fins

34: Substrate

35: LED components

36: Surrounding Department

37a, 37b: Phosphor layers

38a, 38b, 39a, 39b: electrode pads

42: surface part

43: Reflecting tube part

44: reflective surface

51: Reflective Face

52: Edge

Detailed ways

The lighting device according to the embodiment includes: a first light-emitting module including a semiconductor light-emitting element, a first wavelength conversion layer disposed on the semiconductor light-emitting element, and a second wavelength conversion layer disposed on the semiconductor light-emitting element; A light-emitting module comprising the semiconductor light-emitting element, the first wavelength conversion layer, and the second wavelength conversion layer, and the arrangement of the first wavelength conversion layer and the second wavelength conversion layer is similar to that of the first light-emitting The module has symmetry; the appliance body is provided with a light source installation part on the lower surface, and the first light-emitting module and the second light-emitting module are alternately installed in the light source installation part; The light emitted by the light emitting module and the second light emitting module is controlled.

Furthermore, in the lighting device according to the embodiment, the first light emitting modules and the second light emitting modules are arranged alternately in an annular shape.

Furthermore, in the lighting device of the embodiment, the first light-emitting modules and the second light-emitting modules are arranged alternately in a straight line.

Furthermore, the lighting device according to the embodiment includes a plurality of third light-emitting modules whose installation directions can be changed, and the plurality of third light-emitting modules are installed in the light source installation part while changing the installation directions alternately.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, the configuration of a lighting device according to one embodiment will be described based on FIGS. 1 to 4 . Fig. 1 is a cross-sectional view of a lighting device according to an embodiment, Fig. 2(a) and Fig. 2(b) are diagrams showing the structure of light emitting modules with different light source arrangements, and Fig. The bottom view of the state of the module, Fig. 4 is a sectional view of the light emitting module.

As shown in FIGS. 1 to 4 , the lighting device 11 is a downlight, and is embedded in an insertion hole provided on a roof member such as a ceiling.

The lighting device 11 includes: a fixture body 12; a plurality of light emitting modules 13a and 13b disposed on one side of the fixture body 12, that is, the lower surface; a reflector 14 disposed on the lower side of these light emitting modules 13a and 13b Installed in the appliance body 12; a translucent cover (cover) 15 installed on the underside of the reflector 14; . The lighting device 11 further includes a power supply unit (unit), which is arranged on the roof member and supplies lighting power to the light emitting module 13a and the light emitting module 13b.

In order to also serve as a heat dissipation member for dissipating the heat emitted by the light emitting module 13a and the light emitting module 13b, the device body 12 is formed of materials such as metals such as aluminum die-cast or ceramics that are excellent in heat conductivity and heat dissipation. , and has a circular substrate portion 21, a cylindrical tube portion 22 is formed in such a manner that the opening is expanded downward from the peripheral portion of the substrate portion 21, and a light-emitting module 13 and a light emitting module are housed inside the tube portion 22. The receiving part 23 of the reflector 14 etc. has the irradiation opening 24 formed in the lower surface of this receiving part 23, ie, the lower surface of the instrument main body.

As shown in FIG. 1 and FIG. 3 , on the peripheral portion of the lower surface of the substrate portion 21, a plurality of six light-emitting module arrangement portions 25 are arranged along the circumferential direction, and the light-emitting module arrangement portions 25 are used to arrange the light-emitting module 13a. And the light emitting module 13b. The light emitting module arrangement portion 25 is formed by a recessed portion 26 formed on the lower surface of the substrate portion 21 . The recessed dimension of the recessed portion 26 is set to be the same as the thickness dimension of the substrate of the light emitting module 13 .

A wiring hole 29 penetrating through the substrate portion 21 is formed at the center of the substrate portion 21 , and a plurality of heat dissipation fins (fins) 30 are radially formed on the upper side of the substrate portion 21 .

Furthermore, each light emitting module 13a and light emitting module 13b has a substrate 34 formed in a substantially rectangular shape from a material such as metal such as aluminum or ceramics having excellent thermal conductivity. On one side of the substrate 34, that is, the surface, a plurality of LED elements 35 as semiconductor light-emitting elements are arranged and mounted in a matrix, and the plurality of LED elements 35 pass through the wiring pattern (pattern) formed on the substrate 34. ) or wire bonding (wire bonding) to connect power supply. A bank-shaped surrounding portion 36 is formed to surround the plurality of LED elements 35, and inside the surrounding portion 36, phosphor layers 37a and 37b that cover the plurality of LED elements 35 in a sealed manner are formed. . That is, the light emitting module 13a and the light emitting module 13b are constituted by a chip on board (Chip On Board, COB) module.

The LED element 35 emits blue light, for example. The phosphor layer 37a as the first wavelength conversion layer is a phosphor that is excited by the blue light emitted by the LED element 35 and mainly emits yellow light. The blue light emitted by the LED element 35 is emitted by the phosphor layer 37a. By converting, white light (light of daylight color) with a color temperature of 6000k to 8000k is emitted.

Then, the emitted light from the LED element 35 is converted by the phosphor layer 37b as the second wavelength conversion layer, and light bulb color light having a color temperature of 2000k to 3000k is emitted from the second wavelength conversion layer.

The white light and bulb-colored light whose wavelength is converted by the phosphor 37a as the first wavelength conversion layer and the phosphor 37b as the second wavelength conversion layer are alternately arranged on the same substrate, and furthermore, the first light emitting module 13a and the Since the second light emitting module 13b is mounted symmetrically in the fixture main body 12, it can mix uniformly and reduce color difference.

In addition, the light-emitting module 13a and the light-emitting module 13b have been described as examples in which the LED element 35 that emits blue light and the phosphor layers 37a and 37b emit white and bulb-colored light, but LEDs that emit light of other colors may also be used. Elements and phosphors of other colors emit light of a color different from white and the color of the light bulb. Furthermore, an example in which the light-emitting module 13a and the light-emitting module 13b emit light of two colors, white and bulb color, has been described, but light-emitting modules that emit light of three or more colors may also be used.

On the surface of the substrate 34, electrode pads (pads) 38a, 38b, 39a, and 39b electrically connected to the plurality of LED elements 35 are mounted. On the electrode pads 38a, 38b, 39a and 39b of each light-emitting module 13a and light-emitting module 13b, a power supply cable (cable) from the power supply unit that is introduced into the appliance body 12 through the wiring hole 29 is connected. The power supply unit supplies lighting power to each of the light emitting modules 13a and 13b.

The electrode pads 38a and 38b supply power to the LED elements 35 arranged under the phosphor layer 37a, and the electrode pads 39a and 39b supply power to the LED elements 35 arranged under the phosphor layer 37b. Thereby, the light emitting module 13a and the light emitting module 13b can emit light of white, lightbulb color, or white and lightbulb color.

Moreover, the reflector 14 is made of insulating synthetic resin, has a disk-shaped surface portion 42, and from the upper surface peripheral portion of the surface portion 42, it is connected with each light-emitting module 13a and the light-emitting module disposed in the device main body 12. A plurality of reflective tube parts 43 protrude from the position of 13b. These reflective cylinder portions 43 are formed in a substantially conical cylindrical shape so as to expand and incline toward the lower irradiation opening 24, and a reflective surface 44 for reflecting light from the LED element 35 toward the downward irradiation direction is formed on the inner surface thereof.

The inner diameter of the front end portion on the upper end side of the reflective surface 44 is larger than the outer diameter of the surrounding portion 36 of the light emitting module 13a and the light emitting module 13b, and the reflecting surface 44 is disposed opposite to each other around the surrounding portion 36 of the light emitting module 13a and the light emitting module 13b. . That is, the front end portion of the upper end side of the reflective surface 44 is located higher than the light emitting surfaces of the light emitting modules 13a and 13b, that is, the surfaces of the phosphor layer 37a and the phosphor layer 37b, and the reflective surface 44 is provided to be opposite to the surrounding surface of the surrounding portion 36. up to the desired position. In addition, at least the lower surface of the surface portion 42 or the reflective surface 44 is given a reflective surface treatment such as a mirror surface or a white surface to improve reflection efficiency.

Furthermore, the translucent cover 15 is made of acrylic resin or glass having translucency and light diffusivity, and is formed in a disk shape with a size covering the entire surface side of the reflector 14, and is detachable by an attachment structure not shown. ground mounted on the reflector 14.

Furthermore, the reflective frame 16 is formed into a cylindrical shape by, for example, metal or synthetic resin, and includes: a reflective surface 51 disposed along the inner wall surface of the housing portion 23 of the appliance body 12; The roof member is held between the lower surface and the mounting spring not shown, and the fitting hole is covered.

In addition, in the illuminating device 11 configured in this manner, by supplying lighting power from the power supply unit to each of the light emitting modules 13a and 13b, the LED elements 35 of each of the light emitting modules 13a and 13b are turned on, so that the phosphor layer 37a and the light-emitting surface on the surface of the phosphor layer 37b emit light. Part of the emitted light goes directly to the translucent cover 15 , and part of it is reflected by the reflective surface 44 to go to the translucent cover 15 , passes through the translucent cover 15 , and is irradiated downward from the irradiation opening 24 .

The heat generated by the lighting of the LED elements 35 of each light emitting module 13a and light emitting module 13b is conducted to the substrate 34, is conducted from the substrate 34 to the device body 12, and is dissipated from the outer surface of the device body 12 including the heat dissipation fins 30. into the air.

According to this lighting device 11, a plurality of light-emitting module arrangement parts 25 are provided on the appliance body 12 to arrange a plurality of light-emitting modules 13a and 13b, and the reflector 14 is provided with light from each light-emitting module 13a and light-emitting module 13b. Since the plurality of reflective surfaces 44 for light reflection increases the amount of light emitted from the lighting device 11, the brightness can be improved.

As shown in FIG. 2( a ) and FIG. 2( b ) to FIG. 4 , in this embodiment, the arrangement of the phosphor layer 37 a and the phosphor layer 37 b is different in the light emitting module 13 a and the light emitting module 13 b. Specifically, in the light emitting module 13a and the light emitting module 13b, the arrangement of the phosphor layer 37a and the phosphor layer 37b is symmetrical. Furthermore, in the lighting device 11, the light emitting modules 13a and the light emitting modules 13b are alternately arranged along the circumferential direction of the substrate part 21, more specifically, they are alternately arranged in an annular shape at an angle of 60° at approximately equal intervals, so that The distribution of light intensity emitted from the lighting device 11 becomes equal.

FIG. 5( a ) and FIG. 5( b ) are diagrams for explaining a conventional photometric distribution and a photometric distribution according to the present embodiment. FIG. 5( a ) shows the photometric distribution of a conventional lighting device, and FIG. 5( b ) shows the photometric distribution of the lighting device according to this embodiment.

As shown in FIG. 5( a ), the conventional lighting device having the same arrangement of light-emitting modules in which the phosphor layer is arranged has a different luminosity between white and light bulb colors, especially in the vicinity of the vertical angle of 20° to 30°.

On the other hand, in the lighting device 11 of this embodiment in which the arrangement of the phosphor layer 37a and the phosphor layer 37b is different, the light emitting modules 13a and 13b are arranged alternately, as shown in FIG. same.

As described above, the lighting device 11 according to this embodiment alternately arranges the light emitting modules 13 a and 13 b in which the arrangement of the phosphor layers 37 a and 37 b has symmetry along the circumferential direction of the substrate portion 21 , and more specifically The light-emitting modules 13a and 13b are arranged alternately in a ring shape at substantially equal intervals along the circumferential direction of the substrate portion 21 so that the light intensity distribution emitted from the lighting device 11 becomes equal.

Therefore, according to the lighting device of the present embodiment, even if a plurality of light sources having a plurality of light colors are provided, color mixing performance can be improved.

In addition, in this embodiment, although the light emitting module 13a and the light emitting module 13b which differ in arrangement|positioning of the phosphor layer 37a and the phosphor layer 37b were demonstrated, it is not limited to this.

Fig. 6 is a diagram illustrating another example of a light emitting module. In addition, in FIG. 6, the same code|symbol is attached|subjected to the structure similar to FIG. 2(a) and FIG. 2(b), and description is abbreviate|omitted.

The light emitting module 13c shown in FIG. 6 has electrode pads 38a, 38b, 39a, and 39b on the upper side and the lower side of the substrate 34, respectively, and the mounting orientation can be changed. By inverting the light-emitting modules 13c upside down and alternately arranging them along the circumferential direction of the substrate portion 21, it is not necessary to provide a plurality of light-emitting modules 13a and 13b with different arrangements of the phosphor layers 37a and 37b. Color mixing performance.

Moreover, in this embodiment, the lighting device 11 in which the light emitting module 13a and the light emitting module 13b are arranged along the circumferential direction has been described, but it is not limited thereto.

Fig. 7 is a diagram for explaining another example of the lighting device. In addition, in FIG. 7, the same code|symbol is attached|subjected to the structure similar to FIG. 3, and description is abbreviate|omitted.

As shown in FIG. 7, in the lighting device 11a, the light emitting modules 13a and the light emitting modules 13b are arranged linearly and alternately on the quadrangular substrate portion 21a. Also in such an illumination device 11a, the color mixing performance can be improved.

Although some embodiments of the present invention have been described, these embodiments are merely examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in other various forms, and various omissions, substitutions, and changes are possible without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope or spirit of the invention, and are included in a range equivalent thereto.

Claims (4)

1. a lighting device, is characterized in that, comprising:

1st light emitting module, the 2nd wavelength conversion layer possessing semiconductor light-emitting elements, be configured in the 1st wavelength conversion layer on described semiconductor light-emitting elements and be configured on described semiconductor light-emitting elements;

2nd light emitting module, possesses described semiconductor light-emitting elements, described 1st wavelength conversion layer and described 2nd wavelength conversion layer, and the configuration of described 1st wavelength conversion layer and described 2nd wavelength conversion layer and described 1st light emitting module have symmetry;

Apparatus body, is provided with light resource installing section at lower surface, is mounted alternately with described 1st light emitting module and described 2nd light emitting module in described light resource installing section; And

Reflector, controls the light from described 1st light emitting module and described 2nd light emitting module outgoing.

2. lighting device according to claim 1, is characterized in that,

Described 1st light emitting module and described 2nd light emitting module are alternately configuration circularly.

3. lighting device according to claim 1, is characterized in that,

Described 1st light emitting module and described 2nd light emitting module be alternately configuration linearly.

4. lighting device according to claim 1, is characterized in that,

Have multiple modifiable installation towards the 3rd light emitting module,

Described multiple 3rd light emitting module alternately changes to be installed towards and is arranged in described light resource installing section.