JP7089661B2 - Holder for light emitting device and light source device - Google Patents

Description

The embodiment relates to a holder for a light emitting device and a light source device.

In recent years, a light emitting device using a light emitting diode (LED) has been widely used as a light source for a lighting device, a display device, and the like due to advantages such as low power consumption and long life. A holder for a light emitting device is used to fix such a light emitting device to an attachment target such as a heat sink. In the holder for a light emitting device, it is required to improve the insulating property between the light emitting device and the mounting target.

Japanese Patent No. 6354967

It is an object of the embodiment to provide a light emitting device holder capable of enhancing the insulation between the light emitting device and the mounting target, and a light source device including such a light emitting device holder.

The light emitting device holder according to the embodiment fixes the light emitting device to the mounting target. The light emitting device is provided on the substrate, a light emitting element mounted in a region on the surface of the substrate separated from the edge of the substrate, and on the surface between the light emitting element and the edge. Includes pads connected to the light emitting element. The light emitting device holder is attached to the holder main body having an opening at a position facing the light emitting element when the light emitting device is fixed to the mounting target, and the light emitting device is fixed to the mounting target. A terminal that sometimes comes into contact with the pad, and a portion of the surface of the substrate that is closest to the pad at the edge of the substrate when it is attached to the holder body and the light emitting device is fixed to the attachment target. It includes an insulating member that abuts on the area between the pad and separates from the contact surface between the pad and the terminal . The insulating member is made of an elastic material. The light emitting device holder fixes the light emitting device to the mounting target by sandwiching a portion of the substrate including the edge thereof between the mounting target and the light emitting device holder.

The light source device according to the embodiment includes the light emitting device holder and the light emitting device fixed to the mounting target by the light emitting device holder.

According to the embodiment, it is possible to realize a light emitting device holder capable of enhancing the insulation between the light emitting device and the mounting target, and a light source device including such a light emitting device holder.

It is an exploded perspective view which shows the light source device which used the holder for a light emitting device which concerns on 1st Embodiment. It is a top view which shows the light emitting device which the holder for a light emitting device which concerns on 1st Embodiment is fixed. It is a bottom view which shows the holder for a light emitting device which concerns on 1st Embodiment. FIG. 2B is a cross-sectional view taken along the line AA'shown in FIG. 2B. It is a partial sectional view which shows the operation of the holder for a light emitting device which concerns on 1st Embodiment, and shows the state which the holder for a light emitting device does not fix a light emitting device to an attachment target. It is a partial sectional view which shows the operation of the holder for a light emitting device which concerns on 1st Embodiment, and shows the state which the holder for a light emitting device fixed to the attachment target. It is a bottom view which shows the holder for a light emitting device which concerns on 2nd Embodiment. It is a bottom view which shows the holder for a light emitting device which concerns on 3rd Embodiment. It is a bottom view which shows the holder for a light emitting device which concerns on 4th Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The drawings referred to below are schematic and the components are omitted or emphasized as appropriate. In addition, the dimensional ratios of the components are not always the same between the figures.

<First Embodiment>
First, the first embodiment will be described.
FIG. 1 is an exploded perspective view showing a light source device using a light emitting device holder according to the present embodiment.
FIG. 2A is a top view showing a light emitting device to which the light emitting device holder according to the present embodiment is fixed.
FIG. 2B is a bottom view showing a holder for a light emitting device according to the present embodiment.
FIG. 2C is a cross-sectional view taken along the line AA'shown in FIG. 2B.

As shown in FIG. 1, in the light source device 300, the light emitting device holder 1 according to the present embodiment fixes the light emitting device 100 to the heat sink 200 to be attached. The mounting target is not limited to the heat sink, and may be, for example, a housing of the light source device 300 or the like.

The light emitting device 100 includes a substrate 101, a light emitting element 102 mounted on the surface 101a of the substrate 101, and a pair of pads 103 provided on the surface 101a and connected to the light emitting element 102. The light emitting element 102 is, for example, an LED, and includes a p layer, a light emitting layer, and an n layer. The p layer and the n layer are connected to the pad 103, respectively. The shape of the substrate 101 is, for example, a rectangular plate. The pads 103 are arranged at two diagonal corners of the four corners of the substrate 101. The shape of the pad 103 is, for example, a rectangular shape, and is drawn out from the light emitting element 102 by a wiring portion. The pad 103 and the wiring portion are integrally formed of a conductive material such as metal.

As shown in FIGS. 1 and 2A, the light emitting device 100 further includes a light reflecting member 104 and a phosphor layer 105. The light reflecting member 104 is made of, for example, a white resin material. The light reflecting member 104 is arranged on the surface 101a of the substrate 101 so as to surround the light emitting element 102, and its shape is, for example, an annular shape. The phosphor layer 105 is arranged inside the light reflecting member 104 and covers the light emitting element 102. The phosphor layer 105 contains, for example, a phosphor in a base material made of a transparent material, absorbs light emitted from the light emitting element 102, and emits light having a wavelength different from this light. As a result, the light emitting device 100 emits light that is a mixture of the light emitted by the light emitting element 102 and the light emitted by the phosphor layer 105.

As shown in FIGS. 1 and 2B, the light emitting device holder 1 is located at a position facing the light emitting element 102 when the light emitting device 100 is fixed to the heat sink 200 to be attached (hereinafter, also referred to as “fixed state”). Is attached to the holder body 11 and the holder body 11 which is open, and is attached to the pair of terminals 12 which come into contact with the pad 103 when the light emitting device 100 is fixed to the heat sink 200, and the holder body 11. In the fixed state, of the surface 101a of the substrate 101 of the light emitting device 100, the insulating member 13 that abuts on the region 101d between the portion 101c of the edge 101b of the substrate 101 closest to the pad 103 and the pad 103. To prepare for.

Note that FIG. 2B is a view of the light emitting device holder 1 viewed from below, that is, from the heat sink 200 side, and the position of the light emitting device 100 in the fixed state is shown by a two-dot chain line. The same applies to FIGS. 4 to 6 described later.

The holder body 11 is made of an insulating material. The holder body 11 is preferably white, for example. Further, the holder body 11 is preferably made of a material that is not easily deteriorated by heat, light or the like. Further, the holder body 11 is preferably made of a material that does not easily generate corrosive gas or gas that adversely affects other members due to heat, light, or the like. For example, examples of the material used for the holder body 11 include PBT (polybutylene terephthalate), ceramics, and liquid crystal polymers.

An opening 11a is formed in the holder body 11. The opening 11a is arranged at a position facing the light emitting element 102 when it is in the fixed state. Further, the holder main body 11 is formed with a through hole 11b for passing the screw 150.

The pair of terminals 12 are made of a springy conductive material, for example, a metal material. The terminal 12 is attached to the holder main body 11 so that electric power can be supplied from the outside. The pair of terminals 12 are in contact with and connected to the pair of pads 103 when they are in the fixed state. As a result, electric power is supplied to the light emitting element 102 from the outside via the terminal 12 of the light emitting device holder 1.

The light emitting device holder 1 is provided with two insulating members 13. The insulating member 13 is attached to the lower surface of the holder body 11. The insulating member 13 is made of an insulating material, for example, an elastic material. More preferably, the insulating member 13 is made of, for example, a white resin material, for example, a silicone resin.

In the present embodiment, the shape of the insulating member 13 is a frame shape. When the light emitting device holder 1 fixes the light emitting device 100 to the heat sink 200, the insulating member 13 comes into contact with the region surrounding the pad 103 on the surface 101a of the substrate 101 of the light emitting device 100. This region includes the above-mentioned region 101d and the region 101e between the pad 103 and the light emitting element 102 on the surface 101a of the substrate 101. The insulating member 13 may or may not be in contact with the edge 101b of the substrate 101 of the light emitting device 100. Further, the insulating member 13 may be in contact with the edge 101b of the substrate 101, overcome the edge 101b, and protrude to the outside of the substrate 101. The insulating member 13 may at least abut on the region of the edge 101b of the substrate 101 closest to the pad 103 and the pad 103, and may be interposed between the portion 101c and the pad 103.

Further, as shown in FIG. 2C, when the light emitting device holder 1 does not fix the light emitting device 100 to the heat sink 200 (hereinafter, also referred to as “non-fixed state”), the root portion 12a of the terminal 12 is an insulating member 13. However, the tip portion 12b of the terminal 12 protrudes from the insulating member 13. In other words, the distance from the holder body 11 to the portion 12c farthest from the holder body 11 in the terminal 12 is La, and the portion farthest from the holder body 11 and the holder body 11 in the insulating member 13, for example, the insulating member. When the distance to the lower surface 13a of 13 is Lb, the distance La is larger than the distance Lb. That is, La> Lb.

As shown in FIG. 1, the heat sink 200 is made of, for example, a metal such as aluminum or copper, and its upper surface 200a is flat. A screw hole 200b to which the screw 150 is screwed is formed on the upper surface 200a. Fins 201 may be formed on the lower surface of the heat sink 200.

Next, the operation of the light emitting device holder 1 according to the present embodiment will be described.
FIG. 3A is a partial cross-sectional view showing the operation of the light emitting device holder according to the present embodiment, and shows a state (non-fixed state) in which the light emitting device holder does not fix the light emitting device to the mounting target.
FIG. 3B is a partial cross-sectional view showing the operation of the light emitting device holder according to the present embodiment, and shows a state (fixed state) in which the light emitting device holder is fixed to the mounting target.
3A and 3B show a part of the cross section corresponding to the cross section of the light emitting device holder of FIG. 2C.

As shown in FIG. 3A, in the non-fixed state, that is, when the light emitting device holder 1 does not fix the light emitting device 100 to the heat sink 200, the tip portion 12b of the terminal 12 protrudes from the insulating member 13.

As shown in FIG. 3B, after the light emitting device 100 is arranged between the light emitting device holder 1 and the heat sink 200, the screw 150 is passed through the through hole 11b of the holder main body 11 to be inserted into the screw hole 200b of the heat sink 200. Screw it down. As a result, the light emitting device holder 1 fixes the light emitting device 100 to the heat sink 200 to be attached by the screw 150. For example, the back surface of the substrate 101 of the light emitting device 100 is in contact with the upper surface of the heat sink 200.

At this time, the lower surface 13a of the insulating member 13 comes into contact with the region of the surface 101a of the substrate 101 of the light emitting device 100 that surrounds the pad 103. This region includes the above-mentioned regions 101d and 101e. Since the insulating member 13 has elasticity, it can be deformed, and even if a part of the insulating member 13 rides on the pad 103, or even if the surface 101a of the substrate 101 has some irregularities, the insulating member 13 is the substrate 101. Can be in close contact with.

At this time, the tip portion 12b of the terminal 12 is brought into contact with the pad 103 of the light emitting device 100, so that the terminal 12 is elastically deformed. As a result, the entire terminal 12 is surrounded by the insulating member 13, and the tip portion 12b is pressed against the pad 103 by an elastic force. As a result, the terminal 12 is securely electrically connected to the pad 103.

Then, the insulating member 13 comes into contact with the region 101d between the pad 103 and the portion 101c of the surface 101a of the substrate 101 of the light emitting device 100 that is closest to the pad 103 on the edge 101b of the substrate 101. It is possible to suppress the generation of electric discharge along the surface 101a of the substrate 101 between the pad 103 and the heat sink 200, and to improve the insulating property between the pad 103 and the heat sink 200. That is, it is possible to suppress the formation of a current path that passes through the region 101d, and to increase the electrical creepage distance from the pad 103 to the heat sink 200.

Next, the effect of this embodiment will be described.
In the present embodiment, the insulating member 13 of the light emitting device holder 1 is brought into contact with the region 101d of the substrate 101 of the light emitting device 100 to realize high insulation between the pad 103 and the heat sink 200. Can be done. As described above, according to the present embodiment, it is possible to realize a light source holder capable of enhancing the insulation between the light emitting device and the mounting target, and a light source device 300 including such a light emitting device holder.

Further, since the insulating member 13 is made of an elastic material, the insulating member 13 can be reliably brought into close contact with the region 101d. This makes it possible to more reliably suppress the formation of a current path that passes through the region 101d. By forming the insulating member 13 with a silicone resin, high insulating properties and heat resistance can be obtained. Further, by making the insulating member 13 white, it is possible to reduce the influence of the insulating member 13 on the color of the light emitted from the light emitting device 100.

Further, in the present embodiment, the tip portion 12b of the terminal 12 protrudes from the insulating member 13 in the non-fixed state. As a result, in the fixed state, the terminal 12 is pressed against the pad 103 and is securely connected.

<Second embodiment>
Next, the second embodiment will be described.
FIG. 4 is a bottom view showing a holder for a light emitting device according to the present embodiment.

As shown in FIG. 4, the light emitting device holder 2 according to the present embodiment has a different shape of the insulating member from the light emitting device holder 1 according to the first embodiment. The shape of the insulating member 23 of the present embodiment is L-shaped when viewed from below.

The configuration of the light emitting device 100 is the same as that of the first embodiment. That is, the shape of the substrate 101 of the light emitting device 100 is a rectangular plate, and the pads 103 are arranged at the two corners of the substrate 101. Then, the insulating member 23 abuts on the region 101d between the two edge edges 101b constituting each corner of the substrate 101 on which the pad 103 is arranged and the pad 103.

The same effect as that of the first embodiment can be obtained by this embodiment as well. The configurations, operations, and effects other than the above in the present embodiment are the same as those in the first embodiment.

<Third embodiment>
Next, a third embodiment will be described.
FIG. 5 is a bottom view showing a holder for a light emitting device according to the present embodiment.

As shown in FIG. 5, the light emitting device holder 3 according to the present embodiment is different from the light emitting device holder 2 according to the second embodiment in that four insulating members 23 are provided. There is. The four insulating members 23 of the light emitting device holder 3 abut on the four corners of the substrate 101 in the fixed state. That is, the insulating member 23 abuts on the two corners of the substrate 101 on which the pad 103 is arranged, as well as the two corners on which the pad 103 is not arranged.

According to the present embodiment, the four insulating members 23 abut on the four corners of the substrate 101 of the light emitting device 100 in the fixed state, thereby reliably preventing the light emitting device 100 from rattling and the light emitting device 100. Can be securely fixed to the heat sink 200 to be mounted. The configurations, operations, and effects other than the above in the present embodiment are the same as those in the first embodiment.

<Fourth Embodiment>
Next, a fourth embodiment will be described.
FIG. 6 is a bottom view showing a holder for a light emitting device according to the present embodiment.

As shown in FIG. 6, the light emitting device holder 4 according to the present embodiment is different in the number and shape of the insulating members from the light emitting device holder 1 according to the first embodiment. The light emitting device holder 4 is provided with one insulating member 43. The shape of the insulating member 43 is a frame shape. The insulating member 43 abuts on the frame-shaped region along the edge 101b of the substrate 101 of the light emitting device 100 in the fixed state. This region includes the above-mentioned region 101d, that is, the region between the portion 101c and the pad 103 closest to the pad 103 at the edge 101b of the substrate 101.

According to the present embodiment, the frame-shaped insulating member 43 abuts on the region including the edge 101b of the substrate 101 of the light emitting device 100 in the fixed state, so that the rattling of the light emitting device 100 can be prevented more reliably. .. The configurations, operations, and effects other than the above in the present embodiment are the same as those in the first embodiment.

The insulating member 43 may be formed with one or more notches. As a result, when the insulating member 43 thermally expands due to the heat generated by the light emitting element 102, the notch absorbs the expanded portion, and the insulating member 43 can be prevented from bending irregularly.

The light emitting device holder according to each of the above-described embodiments may be provided with a "holding portion" in addition to the insulating member. The holding portion is selectively provided in a part of the holder main body 11 except for the region provided with the insulating member, the opening 11a, and the through hole 11b. The height of the holding portion is slightly lower than the height of the insulating member, that is, the distance Lb shown in FIG. 2C. As a result, when the holder for the light emitting device is pressed against the substrate 101 of the light emitting device 100 and the insulating member is crushed to some extent, the holding portion abuts on the substrate 101. As a result, it is possible to more reliably prevent the light emitting device 100 from rattling in the fixed state.

In each of the above-described embodiments, an example is shown in which the mounting target to which the light emitting device 100 is fixed is a heat sink, but the present invention is not limited to this. Further, in each of the above-described embodiments, an example in which the light emitting device 100 is in contact with the heat sink 200 to be attached is shown, but the present invention is not limited thereto. Some member may be interposed between the light emitting device 100 and the mounting target. For example, in order to increase the airtightness between the back surface of the substrate 101 of the light emitting device 100 and the heat sink 200 and reduce the thermal resistance, a heat conductive sheet or a heat conductive paste may be interposed.

The present invention can be used, for example, as a light source for a lighting device and a display device.

1, 2, 3, 4: Holder for light emitting device 11: Holder body 11a: Opening 11b: Through hole 12: Terminal 12a: Root 12b: Tip 12c: Part 13: Insulation member 13a: Bottom surface 23: Insulation member 43 : Insulation member 100: Light emitting device 101: Substrate 101a: Surface 101b: Edge edge 101c: Part 101d: Region 101e: Region 102: Light emitting element 103: Pad 104: Light reflecting member 105: Fluorescent material layer 150: Screw 200: Heat sink 200a : Top surface 200b: Screw hole 201: Fin 300: Light source device La, Lb: Distance

Claims (7)

A substrate, a light emitting element mounted in a region on the surface of the substrate separated from the edge of the substrate, and a light emitting element provided between the light emitting element and the edge on the surface and connected to the light emitting element. A holder for a light emitting device, which fixes a light emitting device including a pad to the mounting target by sandwiching a portion of the substrate including the edge thereof between the mounting target and the mounting target.
A holder body having an opening at a position facing the light emitting element when the light emitting device is fixed to the mounting target.
A terminal that is attached to the holder body and comes into contact with the pad when the light emitting device is fixed to the attachment target.
When the light emitting device is made of an elastic material and is attached to the holder body and fixed to the attachment target, the space between the pad and the portion of the surface of the substrate closest to the pad at the edge of the substrate. An insulating member that abuts on the region of the above and is separated from the contact surface between the pad and the terminal .
Holder for light emitting device with. The shape of the substrate is a rectangular plate,
The pad is arranged between the corner portion of the substrate and the region where the light emitting element is mounted .
The holder for a light emitting device according to claim 1 , wherein the insulating member abuts on at least a region between two edges constituting the corner portion on the surface of the substrate and the pad. The holder for a light emitting device according to claim 2 , wherein the insulating member also abuts on a region between the pad and the light emitting element on the surface of the substrate. The holder for a light emitting device according to claim 2 , wherein the insulating member also abuts on a corner portion of the substrate on which the pad is not arranged. The holder for a light emitting device according to any one of claims 1 to 4 , wherein the insulating member abuts on a frame-shaped region along an edge of the substrate. The terminal has a spring property and has a spring property.
When the light emitting device holder does not fix the light emitting device to the mounting target, the distance from the holder body to the portion of the terminal farthest from the holder body is the distance from the holder body to the insulating member. The holder for a light emitting device according to any one of claims 1 to 5 , which is larger than the distance from the holder body to the farthest part. The holder for a light emitting device according to any one of claims 1 to 6 .
The light emitting device fixed to the mounting target by the light emitting device holder,
A light source device equipped with.

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