JP2012049036A - Light emitting device and lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light emitting device in which occurrence of color conversion loss is suppressed, a color conversion member can be detached simply, and each color conversion element can be converted into a different color.SOLUTION: The light emitting device 200 is provided with a substrate 202 of which on the front surface a light emitting element 201 is attached and a device body 210 to surround the substrate 202. The device body 210 has a cylindrical reflecting surface 207 installed on the front side of the substrate 202. The reflecting surface 207 has an incident port into which light emitted from the light emitting element 201 enters, a reflecting surface which reflects light entered from the incident port, and an outgoing port from which the light reflected by the reflecting surface is discharged. A color conversion member 205 of a three-dimensional shape corresponding to the shape of the reflecting surface 207 is attached and detached to the reflecting surface 207. The color conversion member 205 transmits the incident light entering from the incident port of the reflecting surface 207 and changes the color of the incident light.

Description

  The present invention relates to a light-emitting device and a lighting fixture for lighting a light-emitting diode, for example.

  There is a technique related to a light emitting device (for example, Patent Document 1) using a plate-shaped wavelength conversion member and a lighting apparatus (for example, Patent Document 2) in which a phosphor layer that changes a light emission color is movable.

JP 2007-180066 (paragraph [0012] to paragraph [0024], FIG. 1) JP 2009-231227 A (paragraph [0006] to paragraph [0010], FIG. 1)

The above prior art has the following problems.
(1) A dedicated structure for fixing the color conversion member (wavelength conversion member, phosphor layer) is required. For this reason, when it is not necessary to convert the emission color, a member that does not convert the emission color is prepared, or the color conversion member is removed. When the color conversion member is removed, an uncomfortable appearance is generated.
(2) The color conversion member needs to be incorporated in a factory that manufactures the light emitting device. In addition, when there are a large number of lighting fixtures on the site, a lot of work is required to adjust all the lighting fixtures. For example, since the chromaticity of each light emitting element is somewhat different due to individual differences of the light emitting elements, it is difficult to adjust a large number of lighting fixtures to the same chromaticity.
(3) Since the color conversion member is provided at a position away from the light emitting element, light loss is likely to occur between the light emitting element and the color conversion member.
(4) When it is desired to change the conversion color to a new color, it is necessary to request a contractor to recombine the luminaire itself or change the conversion member, which imposes a heavy burden on work costs and work time.
(5) The light emission color cannot be converted into a different color for each light emitting element.

  An object of the present invention is, for example, to suppress the occurrence of color conversion loss, easily attach and detach a color conversion member, and enable conversion to a different color for each light emitting element.

  The light-emitting device of the present invention is an element substrate on which a light-emitting element is attached to the front surface, and a cylindrical reflecting portion provided on the front surface side of the element substrate, and receives light emitted from the light-emitting element. A reflective part having an entrance, a reflective surface that reflects light incident from the entrance, and an exit that emits light reflected by the reflective surface, and color conversion of a three-dimensional shape corresponding to the shape of the reflective part And a color conversion member that is detachably attached to the reflecting portion and transmits incident light that has entered from the entrance of the reflecting portion and changes the color of the incident light when attached to the reflecting portion.

According to the present invention, for example, occurrence of color conversion loss can be suppressed, the color conversion member can be easily attached and detached, and conversion into a different color for each light emitting element can be performed.
Accordingly, the chromaticity of the illumination can be easily adjusted or changed by replacing the color conversion member not only at the time of production of the lighting fixture but also at the site where the lighting fixture is used. Furthermore, since adjustment and change of chromaticity are easy, burdens such as work cost and work time are reduced.

FIG. 3 is a perspective view of the lighting apparatus 100 according to Embodiment 1. Sectional drawing of the transversal direction of the lighting fixture 100 in Embodiment 1. FIG. 1 is a front view of a light emitting device 200 according to Embodiment 1. FIG. FIG. 3 is a cross-sectional view in the longitudinal direction of the light-emitting device 200 according to Embodiment 1. Sectional drawing of the transversal direction of the light-emitting device 200 in Embodiment 1. FIG. FIG. 3 is an exploded perspective view of the light emitting device 200 according to Embodiment 1. FIG. 6 shows a process for attaching the color conversion member 205 in the first embodiment. FIG. 3 is an assembly diagram of the light-emitting device 200 according to Embodiment 1. FIG. 3 is a front view of a light emitting device 200 showing an example of attachment of a color conversion member 205 in the first embodiment. 2 is a partial perspective view (A) and a partial cross-sectional view in the longitudinal direction of a light-emitting device 200 showing an example of attachment of a color conversion member 205 in Embodiment 1. 2 is a partial perspective view of light emitting devices 200a and 200b having different cross-sectional shapes of a color conversion member 205 in Embodiment 1. FIG. FIG. 5 is a side view of a color conversion member 205c having a protective layer 211 in Embodiment 1. The perspective view which shows 210d of another shape apparatus main body in Embodiment 1. FIG. FIG. 4 is a perspective view showing another shape of apparatus main body 210e according to the first embodiment. Sectional drawing of the transversal direction of the apparatus main body 210f in Embodiment 2. FIG. Sectional drawing of the transversal direction of the apparatus main body 210g in Embodiment 2. FIG. Sectional drawing of the transversal direction of the apparatus main body 210h in Embodiment 2. FIG. Sectional drawing of the transversal direction of the apparatus main body 210i in Embodiment 2. FIG.

Embodiment 1 FIG.
FIG. 1 is a perspective view of a lighting fixture 100 in the first embodiment.
FIG. 2 is a cross-sectional view in the short direction of lighting apparatus 100 in the first embodiment.
The lighting fixture 100 in Embodiment 1 is demonstrated based on FIG. 1 and FIG.

The luminaire 100 includes a light emitting device 200 that turns on a light emitting element such as a light emitting diode, a main body cover 120 that covers and protects the light emitting device 200, a fixture main body 110 that fixes the light emitting device 200, and a main body cover 120 that is fixed to the fixture main body 110. A fixture 130 is provided.
The appliance main body 110 includes a power supply device (not shown) that supplies power to the light emitting device 200. The power supply device receives AC voltage / current from a commercial power supply, rectifies the input AC voltage / current into DC voltage / current, steps down the DC voltage / current obtained by the rectification, and outputs the voltage to the light emitting device 200. .

  Next, the light emitting device 200 of the lighting fixture 100 will be described.

FIG. 3 is a front view of light-emitting device 200 in the first embodiment.
FIG. 4 is a cross-sectional view in the longitudinal direction of light-emitting device 200 in the first embodiment. In order to distinguish the color conversion member 205 from the color conversion member 205, the hatched lines representing the cross section of the apparatus main body 210 and the like are omitted (the same applies to the following cross sectional views).

  As shown in FIGS. 3 and 4, the light emitting device 200 includes an elongated rod-shaped device main body 210, and a plurality of light emitting elements 201 (for example, light emitting diodes) are arranged in a line in the longitudinal direction in the device main body 210 ( A color conversion member 205 is provided for each light emitting element 201. Each color conversion member 205 is covered with a cover 204.

FIG. 5 is a cross-sectional view in the short-side direction of light-emitting device 200 in the first embodiment.
FIG. 6 is an exploded perspective view of light-emitting device 200 in the first embodiment.
FIG. 7 is a diagram illustrating a process of attaching the color conversion member 205 in the first embodiment.

  As shown in FIG. 5, a substrate 202 is attached to the device main body 210 of the light emitting device 200. A light emitting element 201 is attached to the central portion of the substrate 202 in the short direction. Hereinafter, the surface to which the light emitting element 201 is attached is the front surface of the substrate 202. The apparatus main body 210 is a frame material surrounding the front surface side of the substrate 202.

The apparatus main body 210 has a reflecting portion 203 on the front surface side of the substrate 202.
The reflective portion 203 has a rectangular pyramid-shaped cylindrical portion (reflecting surface 207) with the light emitting element 201 side narrowed at a portion facing the light emitting element 201 attached to the substrate 202.
The reflecting surface 207 receives the light of the light emitting element 201 from the opening (incident port) on the light emitting element 201 side, reflects the incident light on the side surface (reflecting surface), and transmits the incident light and the reflected light to the incident port. The light is emitted from the opening (exit port) on the opposite side.

  A color conversion member 205 having a three-dimensional shape corresponding to the reflection surface 207 is fitted into the reflection surface 207 like a plug. That is, the color conversion member 205 is a quadrangular pyramid member and is housed in the reflection surface 207 (see FIGS. 6 and 7).

The color conversion member 205 is formed of a plastic resin, and a color conversion material that changes the wavelength of light is mixed in the plastic resin.
When the color conversion member 205 is attached to and detached from the reflection surface 207 and attached to the reflection surface 207, the light of the light emitting element 201 that has entered the entrance of the reflection surface 207 is transmitted, and the color of the light is specified by changing the wavelength of the light. Change the color.

  The end of the reflecting surface 207 on the light emitting element 201 side is close to the substrate 202 and the light emitting element 201 so as not to contact each other. That is, the color conversion member 205 attached to the reflection surface 207 is also close to the light emitting element 201.

The apparatus main body 210 includes a cover presser claw 206 that holds the cover 204, and a transparent cover 204 that covers the emission port of the reflection section 203 is attached to the apparatus main body 210.
The cover presser claw portion 206 is a convex portion that protrudes toward the center side in the short direction of the apparatus main body 210 and prevents the cover 204 from falling off.
The cover 204 protects the apparatus main body 210 and prevents the color conversion member 205 from falling off the reflecting surface 207.

FIG. 8 is an assembly diagram of light-emitting device 200 in the first embodiment.
A method for assembling light-emitting device 200 in Embodiment 1 will be described with reference to FIG.

When the color of the illumination of the lighting fixture 100 is not converted, the color conversion member 205 is not attached to the light emitting device 200 (initial state (1)).
When it is desired to convert the illumination color of the luminaire 100 to a specific color in the initial state (1), the following steps (2) to (5) are executed.

First, (2) the cover 204 is removed from the light emitting device 200.
Next, (3) and (4) the color conversion member 205 that changes the light of the light emitting element 201 to light of a desired color is inserted into each reflection surface 207 and attached.
Then, (5) the cover 204 is attached to the light emitting device 200 so as to be caught by the cover presser claw 206.

  When it is desired to convert the illumination color of the luminaire 100 to another color, the color conversion member 205 is removed from each reflecting surface 207 after the step (2), and then the steps (3) to (5) are executed.

When removing the color conversion member 205 from the reflection surface 207, the substrate 202 is removed from the apparatus main body 210, and a bar-like object is inserted into the entrance of the reflection surface 207 to push out the color conversion member 205.
In addition, the color conversion member 205 can be dropped by turning the apparatus main body 210 upside down, attached to an adhesive, or pulled out, or inserted into a thin plate or thin rod in the gap with the reflective surface 207. You can wear it or pick it out.

FIG. 9 is a front view of light emitting device 200 showing an example of attachment of color conversion member 205 in the first embodiment.
FIG. 10 is a partial perspective view (A) and a partial sectional view (B) in the longitudinal direction of the light emitting device 200 showing an example of attachment of the color conversion member 205 in the first embodiment.

As shown in FIGS. 9 and 10, the color conversion member 205 may be attached to a part of the reflection surfaces 207. For example, the reflective surface 207 to which the color conversion member 205 is attached and the reflective surface 207 to which the color conversion member 205 is not attached may be alternately arranged.
In addition, a plurality of types of color conversion members 205 having different colors of light after color conversion may be attached to each reflecting surface 207. For example, two types of color conversion members 205 may be attached to the reflecting surface 207 alternately.
Thereby, the variation of color conversion can be increased and the illumination color of the lighting fixture 100 can be adjusted more freely.

FIG. 11 is a partial perspective view of the light emitting devices 200a and 200b having different cross-sectional shapes of the color conversion member 205 in the first embodiment.
When a plurality of types of color conversion members 205 are used, the cross-sectional shape of the color conversion member 205 may be different for each type in order to easily determine the type of the color conversion member 205. However, the reflecting surface 207 is formed into a shape corresponding to the cross-sectional shape of the color conversion member 205 to be attached.
For example, in the apparatus main body 210a of FIG. 11A, reflective surfaces 207 having a square cross-sectional shape and reflective surfaces 207a having a circular cross-sectional shape are alternately arranged. If the color conversion member 205 is attached only to the reflection surface 207 having a square cross-sectional shape, light of a color corresponding to the type of the color conversion member 205 having a square cross-sectional shape can be obtained.
The cross-sectional shapes of the color conversion member 205 and the reflection surface 207 are not limited to a square or a circle, but may be a triangle or a cross as shown in FIG. Further, three or more kinds of reflection surfaces 207 and color conversion members 205 may be provided in one apparatus main body 210.

FIG. 12 is a side view of the color conversion member 205c having the protective layer 211 in the first embodiment.
As illustrated in FIG. 12, the color conversion member 205 c may include a color conversion layer 212 having a function of changing the color of light and a protective layer 211 that protects the color conversion layer 212.
By providing the color conversion member 205c with the protective layer 211, the protection and the strength of the color conversion member 205c are improved. Further, workability for attaching the color conversion member 205c is improved.
The color conversion member 205c may have a multilayer structure of three or more layers. For example, the color conversion member 205c may have a three-layer sandwich structure in which the color conversion layer 212 is sandwiched between two protective layers 211.

13 and 14 are perspective views showing light emitting devices 200d · e having different shapes in the first embodiment.
The shape of the light emitting device 200 is not limited to a straight line. For example, as shown in FIG. 13 and FIG. 14, the light emitting device 200d · e may have a circular shape.
FIG. 13 shows an example in which the color conversion member 205d is arranged concentrically, and FIG. 14 shows an example in which the color conversion member 205e is arranged in the center of the apparatus main body 210e.
The apparatus main body 210d · e can be used for a lighting fixture (for example, a downlight) having a circular light emitting surface.

In Embodiment 1, the lighting fixture 100 and the light emitting device 200 that can easily and reliably attach the color conversion member 205 to each light emitting element 201 have been described.
The color conversion member 205 can be disposed in the vicinity of the light emitting element 201 by attaching the color conversion member 205 so as to fill the reflective surface 207 close to the light emitting element 201. Then, more light from the light emitting element 201 can directly enter the color conversion member 205, and the color of the light from the light emitting element 201 can be changed with high color conversion efficiency (color conversion accuracy). That is, there is little light color conversion loss. On the other hand, when the color conversion member cannot be disposed in the vicinity of the light emitting element 201, such as when a plate-like color conversion member is disposed on the exit side of the reflecting surface 207 like the cover 204, the color conversion member is directly from the light emitting element 201. The color conversion loss is large because the color of the reflected light that is reflected and attenuated by the reflecting surface 207 is changed instead of the light.

Embodiment 2. FIG.
A mode in which the color conversion member 205 is fixed to the reflection surface 207 will be described.
The color conversion member 205 can be affixed to the reflecting surface 207 with an adhesive or the like, but may be fixed to the reflecting surface 207 as described below for easy attachment / detachment.

FIG. 15 is a cross-sectional view in the short-side direction of apparatus main body 210f in the second embodiment.
In FIG. 15, the color conversion member 205 f has a convex portion (claw 221) projecting outward at the edge of the bottom portion (a portion where the conical shape is narrowed on the light emitting element 201 side), and a concave portion 222 at the center of the bottom portion.
When the color conversion member 205f is attached to the reflection surface 207f, the tab 221 of the color conversion member 205f is caught by the entrance of the reflection surface 207f, and the color conversion member 205f is fixed to the reflection surface 207f. The head of the light emitting element 201 is received in the recess 222 of the color conversion member 205f.

FIG. 16 is a cross-sectional view in the short direction of the apparatus main body 210g according to the second embodiment.
In FIG. 16, the color conversion member 205g and the reflection surface 207g are composed of a cone portion and column portions (straight portions 231 and 232) equal to the width of the bottom portion of the cone portion.
The color conversion member 205g has elasticity, and the outer diameter of the straight portion 231 of the color conversion member 205g is slightly larger than the inner diameter of the straight portion 232 of the reflection surface 207g.
When the color conversion member 205g is attached to the reflection surface 207g, the straight portion 231 of the color conversion member 205g is compressed and fit into the straight portion 232 of the reflection surface 207g. The color conversion member 205g and the reflective surface 207g are pressed against each other's straight portion, and the color conversion member 205g is fixed to the reflective surface 207g.

FIG. 17 is a cross-sectional view in the short direction of the apparatus main body 210h according to the second embodiment.
In FIG. 17, the color conversion member 205h has a convex portion 241 at the intermediate portion between the top portion (the portion where the conical shape is widened on the opposite side to the light emitting element 201) and the bottom portion, and the reflection surface 207h has A concave portion 242 is provided in the middle portion of each.
When the color conversion member 205h is attached to the reflective surface 207h, the convex portion 241 of the color conversion member 205h is fitted into the concave portion 242 of the reflective surface 207h, and the color conversion member 205h is fixed to the reflective surface 207h.

FIG. 18 is a cross-sectional view in the short direction of the apparatus main body 210i in the second embodiment.
In FIG. 18, the color conversion member 205 i has a concave portion 243 at an intermediate portion between the top portion and the bottom portion, and the reflective surface 207 i has a convex portion 244 at an intermediate portion between the top portion and the bottom portion.
When the color conversion member 205i is attached to the reflective surface 207i, the convex portion 244 of the reflective surface 207i is fitted into the concave portion 243 of the color conversion member 205i, and the color conversion member 205i is fixed to the reflective surface 207i.

The fixing methods in FIGS. 15 to 18 may be combined.
That is, the color conversion member 205 has a claw 221 (FIG. 15), a concave portion 222 (FIG. 15), a straight portion 231 (FIG. 16), a convex portion 241 (FIG. 17) or a concave portion 243 (FIG. 18)). The reflective surface 207 may have a combination of a straight portion 232 (FIG. 16), a concave portion 242 (FIG. 17), or a convex portion 244 (FIG. 18) so as to correspond to the color conversion member 205.

  According to the second embodiment, it is possible to prevent the color conversion member 205 from falling off the reflecting surface 207 during use of the lighting fixture 100.

  DESCRIPTION OF SYMBOLS 100 Lighting fixture, 110 Appliance main body, 120 Main body cover, 130 Fixture, 200 Light emitting device, 201 Light emitting element, 202 Substrate, 203 Reflecting part, 204 Cover, 205 Color conversion member, 206 Cover presser claw part, 207 Reflecting surface, 210 Device main body, 211 protective layer, 212 color conversion layer, 221 claw, 222 concave portion, 231 straight portion, 232 straight portion, 241 convex portion, 242 concave portion, 243 concave portion, 244 convex portion.

Claims (9)

An element substrate on which the light emitting element is attached to the front surface;
A cylindrical reflecting portion provided on the front surface side of the element substrate, an incident port for receiving light emitted from a light emitting element, a reflecting surface for reflecting light incident from the incident port, and the reflecting surface A reflection part having an emission port for emitting the light reflected by
A three-dimensional color conversion member corresponding to the shape of the reflecting portion, which is attached to and detached from the reflecting portion and transmits incident light incident from the entrance of the reflecting portion when attached to the reflecting portion. A light-emitting device comprising a color conversion member that changes the color of light. The light emitting device according to claim 1, wherein the color conversion member has a claw portion protruding outward and hooked to the incident port of the reflection portion. The color conversion member has a compression portion having an outer diameter larger than an inner diameter of an end portion on the incident port side of the reflection portion, and is compressed and received at an end portion on the incident port side of the reflection portion. The light-emitting device according to claim 1 or 2. The reflection portion has a recess in the reflection surface,
The light emitting device according to claim 1, wherein the color conversion member has a convex portion that fits into the concave portion of the reflecting portion. The reflective portion has a convex portion on the reflective surface,
The light emitting device according to any one of claims 1 to 4, wherein the color conversion member has a concave portion that fits with the convex portion of the reflecting portion. The said color conversion member is a member of the multilayer structure which has the color conversion layer which changes the color of incident light, and the protective layer for protecting the said color conversion layer. 5. The light emitting device according to any one of 5. The light emitting device includes a plurality of reflecting portions and a plurality of color conversion members,
The cross-sectional shape of each reflective portion is different from the cross-sectional shape of at least one of the other reflective portions,
7. The light emitting device according to claim 1, wherein a cross-sectional shape of each color conversion member corresponds to at least one of the cross-sectional shapes of the plurality of reflecting portions. 8. The light emitting device according to claim 7, wherein each color conversion member changes the color of incident light to a color different from the color after change of incident light changed by at least one of the other color conversion members. A light emitting device according to any one of claims 1 to 8,
A lighting fixture comprising: a fixture main body for fixing the light emitting device.

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