JP2011086569A - Light-emitting device, plane light source device, and display device - Google Patents

Light-emitting device, plane light source device, and display device Download PDF

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JP2011086569A
JP2011086569A JP2009240189A JP2009240189A JP2011086569A JP 2011086569 A JP2011086569 A JP 2011086569A JP 2009240189 A JP2009240189 A JP 2009240189A JP 2009240189 A JP2009240189 A JP 2009240189A JP 2011086569 A JP2011086569 A JP 2011086569A
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light
substrate
flux controlling
light emitting
light flux
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JP5396607B2 (en
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Yasuyuki Fukuda
康幸 福田
Shigeru Nakiyama
滋 名木山
Hideaki Kato
秀昭 加藤
Manabu Takashio
学 高塩
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Enplas Corp
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Enplas Corp
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<P>PROBLEM TO BE SOLVED: To stably fix a light-flux control member in a state positioned to a substrate without using a component to be a factor of degrading illumination quality, even in case swelling volumes differ between the substrate and the light-flux control member due to difference of a linear expansion coefficient by temperature changes caused by light-emitting elements. <P>SOLUTION: The light-emitting device 3 is provided with a substrate, a sheet member 10, and a light-flux control member 7. On a rear face 8 of the light-flux control member 7, a plurality of support legs 15 are formed and fixed to either the substrate 5 or the sheet member 10. The support legs 15, at thermal expansion, generates distortion due to differences of linear expansion coefficients. The sheet member 10 has a linear expansion coefficient near to that of the light-flux control member 7 as compared with that of the substrate 5, and displaces from the substrate 5 so as to alleviate the distortion. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、発光装置、面光源装置、及び表示装置に関し、例えば、液晶表示パネルの背面側から面状に照明するバックライトの光源や室内の一般照明など各種照明として用いられる発光装置、これを使用し、各種照明に用いられる面光源装置、及びこの面光源装置を照明手段として被照明部材と組み合わせて使用する表示装置に関するものである。   The present invention relates to a light-emitting device, a surface light source device, and a display device, for example, a light-emitting device used as various types of illumination such as a backlight light source that illuminates in a planar shape from the back side of a liquid crystal display panel and indoor general illumination, The present invention relates to a surface light source device that is used and used for various types of illumination, and a display device that uses the surface light source device in combination with an illuminated member as illumination means.

従来から、テレビジョンやパーソナルコンピュータ等に使用される液晶表示モニタの照明手段として、点状に発光する複数の発光素子(例えば、LED)を光源として使用した面光源装置が知られている。この面光源装置は、板状の基板に対して複数のLEDをマトリックス状に配置し、そのLEDからの光を光束制御部材の裏面側から光束制御部材の内部に入射させ、その光束制御部材の内部に入射した光を出射面から出射させて、その出射光によって液晶表示パネルをその背面側から面状に照明するようになっている。   2. Description of the Related Art Conventionally, a surface light source device using a plurality of light emitting elements (for example, LEDs) that emit light in a dot shape as a light source is known as an illuminating means for a liquid crystal display monitor used in a television, a personal computer, or the like. In this surface light source device, a plurality of LEDs are arranged in a matrix on a plate-shaped substrate, and light from the LEDs is incident on the inside of the light flux control member from the back side of the light flux control member. The light incident on the inside is emitted from the emission surface, and the emitted light illuminates the liquid crystal display panel in a planar shape from the back side.

この面光源装置は、構成部品がそれぞれ熱膨張率の異なる部品で構成されている。そして、面光源装置は、LEDを長時間点灯させると基板の配線パターンを流れる電流の電気抵抗によってジュール熱等が発生することや使用環境の変化により、面光源装置の内部で温度変化が起こっていた。これらにより、面光源装置の各構成部品には、温度変化による熱膨張率の違いから、構成部品の一部にひずみが発生する等の不具合が生じていた。   In this surface light source device, each component is composed of components having different thermal expansion coefficients. In the surface light source device, when the LED is lit for a long time, Joule heat or the like is generated due to the electric resistance of the current flowing through the wiring pattern of the board, and the temperature change occurs inside the surface light source device due to a change in usage environment. It was. As a result, each component of the surface light source device has a problem such as distortion in a part of the component due to a difference in coefficient of thermal expansion due to temperature change.

このような不具合を解消する技術として、例えば、以下に記載する技術が開示されている。図31は、従来技術に係る照明装置(発光装置)の平面図を示した図である。図32は、従来技術に係る照明装置からレンズを取り外した状態を示した図である。図33(a)は、従来技術に係る照明装置において、ホルダが基板に対して収縮した状態を示す図である。図33(b)は、従来技術に係る照明装置において、ホルダが基板に対して膨張した状態を示した図である。   As techniques for solving such problems, for example, techniques described below are disclosed. FIG. 31 is a diagram illustrating a plan view of a lighting device (light emitting device) according to the related art. FIG. 32 is a diagram illustrating a state in which a lens is removed from the illumination device according to the related art. FIG. 33A is a diagram illustrating a state in which the holder contracts with respect to the substrate in the illumination device according to the related art. FIG. 33B is a diagram showing a state in which the holder is expanded with respect to the substrate in the illumination device according to the related art.

図31に示す通り、従来技術に係る照明装置101は、複数のLED102が長手方向に並べて取り付けられた長板状の基板103と、基板を支持するホルダ104と、各LED102を覆うレンズ105を備えている。   As shown in FIG. 31, the illumination device 101 according to the related art includes a long plate-like substrate 103 on which a plurality of LEDs 102 are arranged in the longitudinal direction, a holder 104 that supports the substrate, and a lens 105 that covers each LED 102. ing.

図32に示す通り、各レンズ105は、レンズ105に形成された凸部106を基板103に形成された凹部107に係合させることにより、基板103に取り付けられたLED102に対して長手方向及び幅方向について位置決めされる。   As shown in FIG. 32, each lens 105 has a longitudinal direction and a width relative to the LED 102 attached to the substrate 103 by engaging the convex portion 106 formed on the lens 105 with the concave portion 107 formed on the substrate 103. Positioned with respect to direction.

そして、レンズ105は、ホルダ104のレンズ保持部108をレンズ105の被保持部110に係合させることにより基板103上に保持されるようになっている。   The lens 105 is held on the substrate 103 by engaging the lens holding portion 108 of the holder 104 with the held portion 110 of the lens 105.

ここで、ホルダ104と基板103とは、別部材で形成されていることにより線膨張係数が異なっている。従って、使用時において、LED102に起因する温度変化が生じると、ホルダ104及び基板の長手方向に、幅方向と比較して、大きな寸法差が発生する。   Here, the holder 104 and the substrate 103 are formed of different members, and therefore have different linear expansion coefficients. Accordingly, when a temperature change caused by the LED 102 occurs during use, a large dimensional difference occurs in the longitudinal direction of the holder 104 and the substrate as compared with the width direction.

図33(a)、図33(b)に示す通り、従来技術に係る照明装置は、レンズ105を固定するレンズ保持部108を有するホルダ104と、レンズ105が取り付けられた基板103とに寸法差が発生しても、レンズ105に形成された凸部106を基板103に形成された凹部107に係合させているため、基板103の膨張に追従してレンズ105が、ホルダ104に対して長手方向へ相対移動するようになっている。すなわち、レンズ105は、基板103上のLED102に対して位置決めされた状態が保たれるようになっている。また、レンズ105の被保持部110は、レンズ保持部108により基板103の長手方向へ移動を許容するようになっているため、ホルダ104とレンズ105に負荷が発生しないようになっている(特許文献1)。   As shown in FIGS. 33A and 33B, the illuminating device according to the related art has a dimensional difference between the holder 104 having the lens holding portion 108 for fixing the lens 105 and the substrate 103 to which the lens 105 is attached. Even if this occurs, the convex portion 106 formed on the lens 105 is engaged with the concave portion 107 formed on the substrate 103. It moves relative to the direction. That is, the lens 105 is kept positioned with respect to the LED 102 on the substrate 103. Further, since the held portion 110 of the lens 105 is allowed to move in the longitudinal direction of the substrate 103 by the lens holding portion 108, no load is generated on the holder 104 and the lens 105 (patent). Reference 1).

特開2007−299089号公報JP 2007-299089 A

しかしながら、従来技術に係る照明装置101は、レンズ105の線膨張係数と基板103の線膨張係数との違いについては、全く考慮されていなかった。更に、従来技術に係る照明装置101におけるレンズ105は、基板103平面上での位置決めがなされているに過ぎず、基板103からレンズ105が抜け落ちることを防止するためには、ホルダ104を用いて固定する必要があった。   However, the illumination device 101 according to the related art does not consider the difference between the linear expansion coefficient of the lens 105 and the linear expansion coefficient of the substrate 103 at all. Furthermore, the lens 105 in the illumination device 101 according to the related art is only positioned on the plane of the substrate 103. In order to prevent the lens 105 from falling off the substrate 103, the lens 105 is fixed using the holder 104. There was a need to do.

このようにレンズ105の一部に係合させる部材が、レンズ105内を伝搬する光の出射を部分的に妨げるようなものである場合、照明装置101からの光による被照射面に暗部を発生させる等、照明品位を低下させる虞があった。   In this way, when the member engaged with a part of the lens 105 is such that the emission of the light propagating through the lens 105 is partially blocked, a dark portion is generated on the surface irradiated with the light from the illumination device 101. There is a risk that the illumination quality may be degraded.

また、ホルダ104に係合させるための形状をレンズ105に形成する場合、その係合部においては光の出射方向を制御することができず、被照射面に明部を発生させる要因となる虞があった。   Further, when the lens 105 is formed with a shape for engaging with the holder 104, the light emitting direction cannot be controlled at the engaging portion, which may cause a bright portion on the irradiated surface. was there.

そこで、本発明は、発光素子(LED)や発光装置の使用環境等に起因する温度変化によって、線膨張係数の違いから、基板と光束制御部材(レンズ)との膨張量に差が生じた場合においても、基板に光束制御部材を安定して固定することができ、且つ、照明品位を低下させる要因となるような部品を使用することがなく、基板への光束制御部材の位置決め及び固定が可能な発光装置、面光源装置及びこれを備えた表示装置を提供することを目的とする。   Therefore, the present invention provides a case where a difference in the expansion amount between the substrate and the light flux controlling member (lens) occurs due to a difference in linear expansion coefficient due to a temperature change caused by a use environment of the light emitting element (LED) or the light emitting device. However, the light flux control member can be stably fixed to the board, and the light flux control member can be positioned and fixed to the board without using any components that cause deterioration in illumination quality. An object of the present invention is to provide a light emitting device, a surface light source device, and a display device including the same.

請求項1に係る発光装置は、基板と、前記基板に取り付けられて点状に発光する発光素子と、前記基板とは異なる材料で形成され、前記発光素子からの光を取り込んで前記光を拡げて出射する光束制御部材と、前記発光素子を取り囲み且つ前記光束制御部材の裏面に対向するように前記基板上に載置されたシート部材と、を備えている。そして、前記光束制御部材は、その裏面に複数の支持脚が突出形成されている。そして、前記複数の支持脚のうちの少なくとも一つの支持脚である第1の支持脚が前記基板に固定され、前記複数の支持脚のうちの前記第1の支持脚以外の少なくとも一つの支持脚である第2の支持脚が前記シート部材に固定されるようになっている。そして、前記シート部材は、前記基板の線膨張係数と比較して前記光束制御部材の線膨張係数に近い線膨張係数の材料で形成され、前記第1の支持脚に係合する係合穴を有しており、前記光束制御部材の前記第1の支持脚が前記シート部材の前記係合穴に係合されて前記基板に固定され、前記光束制御部材の前記第2の支持脚が前記シート部材に固定されることにより、前記光束制御部材が前記発光素子に対して位置決めされる。そして、前記光束制御部材の前記第1の支持脚が前記シート部材の前記係合穴に係合されて前記基板に固定され、且つ、前記光束制御部材の前記第2の支持脚が前記シート部材に固定された状態で、前記基板、前記シート部材及び前記光束制御部材が熱膨張すると、前記シート部材のうちの少なくとも前記第1の支持脚と前記第2の支持脚との間の部分が前記基板に対して変位することを特徴としている。   The light-emitting device according to claim 1 is formed of a substrate, a light-emitting element that is attached to the substrate and emits light in a dotted manner, and a material different from the substrate, and takes in light from the light-emitting element and spreads the light. And a sheet member placed on the substrate so as to surround the light emitting element and to face the back surface of the light beam control member. The light flux controlling member has a plurality of support legs protruding from the back surface thereof. A first support leg that is at least one of the plurality of support legs is fixed to the substrate, and at least one of the plurality of support legs other than the first support leg. A second support leg is fixed to the seat member. The sheet member is formed of a material having a linear expansion coefficient that is closer to the linear expansion coefficient of the light flux controlling member than the linear expansion coefficient of the substrate, and has an engagement hole that engages with the first support leg. And the first support leg of the light beam control member is engaged with the engagement hole of the sheet member and fixed to the substrate, and the second support leg of the light beam control member is the sheet. By fixing to the member, the light flux controlling member is positioned with respect to the light emitting element. The first support leg of the light beam control member is engaged with the engagement hole of the sheet member and fixed to the substrate, and the second support leg of the light beam control member is the sheet member. When the substrate, the sheet member, and the light flux controlling member are thermally expanded in a state of being fixed to each other, at least a portion of the sheet member between the first support leg and the second support leg is It is characterized by being displaced with respect to the substrate.

請求項2に係る発光装置は、基板と、前記基板に取り付けられて点状に発光する発光素子と、前記基板とは異なる材料で形成され、前記発光素子からの光を取り込んで前記光を拡げて出射する光束制御部材と、前記発光素子を取り囲み且つ前記光束制御部材の裏面に対向するように前記基板上に保持されたシート部材と、を備えている。そして、前記光束制御部材は、その裏面に複数の支持脚が突出形成されている。そして、前記シート部材は、前記基板の線膨張係数と比較して前記光束制御部材の線膨張係数に近い線膨張係数の材料で形成されている。そして、前記光束制御部材の前記複数の支持脚が前記シート部材上に固定されることにより、前記光束制御部材が前記発光素子に対して位置決めされている。そして、前記光束制御部材の前記複数の支持脚が前記シート部材に固定された状態で、前記基板、前記シート部材及び前記光束制御部材が熱膨張すると、前記シート部材のうちの少なくとも前記複数の支持脚の間の部分が前記基板に対して変位することを特徴としている。   A light-emitting device according to claim 2 is formed of a substrate, a light-emitting element that is attached to the substrate and emits light in a dotted manner, and a material different from the substrate, and takes in light from the light-emitting element and spreads the light. And a sheet member that surrounds the light emitting element and is held on the substrate so as to face the back surface of the light beam control member. The light flux controlling member has a plurality of support legs protruding from the back surface thereof. The sheet member is formed of a material having a linear expansion coefficient that is closer to the linear expansion coefficient of the light flux controlling member than the linear expansion coefficient of the substrate. And the said light beam control member is positioned with respect to the said light emitting element by fixing the said several support leg of the said light beam control member on the said sheet | seat member. When the plurality of support legs of the light flux controlling member are fixed to the sheet member and the substrate, the sheet member, and the light flux controlling member are thermally expanded, at least the plurality of support members of the sheet member are supported. A portion between the legs is displaced with respect to the substrate.

請求項3に係る発光装置は、請求項1の発明において、前記シート部材は、少なくとも前記第1の支持脚と前記第2の支持脚との間の部分に切り込み部が形成され、前記基板、前記シート部材及び前記光束制御部材が熱膨張すると、前記切り込み部が開口することを特徴としている。   According to a third aspect of the present invention, in the light emitting device according to the first aspect of the present invention, the sheet member has a notch formed at least in a portion between the first support leg and the second support leg, When the sheet member and the light flux controlling member are thermally expanded, the cut portion is opened.

請求項4に係る発光装置は、請求項2の発明において、前記シート部材は、前記複数の支持脚のうちの少なくとも隣り合う一組の支持脚の間の部分に切り込み部が形成され、前記基板、前記シート部材及び前記光束制御部材が熱膨張すると、前記切り込み部が開口することを特徴としている。   According to a fourth aspect of the present invention, in the light emitting device according to the second aspect of the present invention, the sheet member has a notch formed in a portion between at least one pair of adjacent support legs among the plurality of support legs, and the substrate. When the sheet member and the light flux controlling member are thermally expanded, the cut portion is opened.

請求項5に係る面光源装置は、前記基板の表面には、前記発光素子が複数隣接配置された前記請求項1乃至4のいずれか一項に記載の発光装置と、前記発光装置からの光が拡散透過される光拡散部材と、を備えたことを特徴としている。   5. A surface light source device according to claim 5, wherein a plurality of the light emitting elements are arranged adjacent to each other on the surface of the substrate, and light from the light emitting device. And a light diffusing member through which light is diffused and transmitted.

請求項6に係る表示装置は、前記請求項5に記載の面光源装置と、前記面光源装置からの光が照射される被照明部材と、を備えたことを特徴としている。   A display device according to a sixth aspect includes the surface light source device according to the fifth aspect, and an illuminated member to which light from the surface light source device is irradiated.

本発明によれば、発光素子や発光装置の使用環境等に起因する温度変化によって、線膨張係数の違いから基板と光束制御部材との膨張量に差が生じた場合においても、照明品位を低下させる要因となるような部品を使用することなく、光束制御部材を基板に位置決めした状態で安定して固定することができる。   According to the present invention, even when a difference in expansion between the substrate and the light flux controlling member is caused by a difference in linear expansion coefficient due to a temperature change caused by the usage environment of the light emitting element or the light emitting device, the illumination quality is lowered. Therefore, the light flux controlling member can be stably fixed in a state in which the light flux controlling member is positioned on the substrate without using a component that causes such a phenomenon.

図1は、被照明部材(例えば、液晶表示パネル)等を取り外して示す表示装置の平面図(面光源装置の平面図)である。FIG. 1 is a plan view of a display device (a plan view of a surface light source device) shown with a member to be illuminated (for example, a liquid crystal display panel) or the like removed. 図2は、表示装置の概略を示す断面図であり、図1のX1−X1線に沿って切断して示す表示装置の断面図である。FIG. 2 is a cross-sectional view schematically showing the display device, and is a cross-sectional view of the display device cut along the line X1-X1 in FIG. 図3(a)は、発光装置の平面図である。図3(b)は、図3(a)のX2−X2線に沿って切断して示す発光装置の断面図である。FIG. 3A is a plan view of the light emitting device. FIG. 3B is a cross-sectional view of the light emitting device cut along the line X2-X2 in FIG. 図4(a)は、実施形態1に係る発光装置を構成する光束制御部材の平面図を示す図である。図4(b)は、図4(a)のX3ーX3線に沿って切断して示す光束制御部材の断面図である。図4(c)は、光束制御部材の裏面図である。FIG. 4A is a diagram illustrating a plan view of a light flux controlling member constituting the light emitting device according to the first embodiment. FIG. 4B is a cross-sectional view of the light flux controlling member cut along the line X3-X3 in FIG. FIG. 4C is a rear view of the light flux controlling member. 図5(a)は、光束制御部材の裏面に不等間隔で形成された支持脚が、熱膨張により変位する様子を模式的に示した図である。図5(b)は、光束制御部材の裏面に等間隔で形成された支持脚が、熱膨張により変位する様子を模式的に示した図である。FIG. 5A is a diagram schematically showing how the support legs formed at unequal intervals on the back surface of the light flux controlling member are displaced by thermal expansion. FIG. 5B is a diagram schematically showing how the support legs formed at equal intervals on the back surface of the light flux controlling member are displaced by thermal expansion. 図6は、光束制御部材の支持脚を接着剤により接着した様子を模式的に表す図である。FIG. 6 is a diagram schematically illustrating a state in which the support legs of the light flux controlling member are bonded with an adhesive. 図7は、発光装置の使用により、光束制御部材及びシート部材が熱膨張した様子を示す図である。FIG. 7 is a diagram illustrating a state in which the light flux controlling member and the sheet member are thermally expanded by using the light emitting device. 図8は、本実施形態に使用される各部材と線膨張係数との関係を示した図である。FIG. 8 is a diagram showing the relationship between each member used in the present embodiment and the linear expansion coefficient. 図9(a)は、実施形態2に係る発光装置の平面図を示すものである。図9(b)は、実施形態2に発光装置を図9(a)のX4ーX4線に沿って切断して示す断面図である。FIG. 9A shows a plan view of the light emitting device according to the second embodiment. FIG. 9B is a cross-sectional view of the light emitting device according to the second embodiment, cut along line X4-X4 in FIG. 9A. 図10は、シート部材が、基板に対してスライド移動して、支持脚の変位量を緩和する様子を示した図である。FIG. 10 is a diagram illustrating a state in which the sheet member slides with respect to the substrate and relaxes the displacement amount of the support leg. 図11(a)は、実施形態3に係る発光装置の平面図を示すものである。図11(b)は、実施形態3に係る発光装置を図11(a)のX5ーX5線に沿って切断して示す断面図である。FIG. 11A is a plan view of the light emitting device according to the third embodiment. FIG. 11B is a cross-sectional view showing the light emitting device according to Embodiment 3 cut along line X5-X5 in FIG. 図12(a)は、実施形態4に係る発光装置の平面図を示すものである。図12(b)は、実施形態4に係る発光装置を図12(a)のX6ーX6線に沿って切断して示す断面図である。FIG. 12A is a plan view of the light emitting device according to the fourth embodiment. FIG. 12B is a cross-sectional view showing the light-emitting device according to Embodiment 4 cut along the line X6-X6 in FIG. 図13(a)は、実施形態5に係る発光装置の平面図を示すものである。図13(b)は、実施形態5に係る発光装置を図13(a)のX7ーX7線に沿って切断して示す断面図である。FIG. 13A is a plan view of the light emitting device according to the fifth embodiment. FIG. 13B is a cross-sectional view showing the light emitting device according to Embodiment 5 cut along line X7-X7 in FIG. 図14(a)は、実施形態6に係る発光装置の平面図を示すものである。図14(b)は、実施形態6に係る発光装置を図14(a)のX8ーX8線に沿って切断して示す断面図である。FIG. 14A is a plan view of the light emitting device according to the sixth embodiment. FIG. 14B is a cross-sectional view showing the light-emitting device according to Embodiment 6 cut along line X8-X8 in FIG. 図15(a)は、参考例1に係る発光装置の平面図を示すものである。図15(b)は、参考例1に係る発光装置を図15(a)のX9ーX9線に沿って切断して示す断面図である。FIG. 15A is a plan view of the light emitting device according to Reference Example 1. FIG. FIG. 15B is a cross-sectional view showing the light emitting device according to Reference Example 1 cut along line X9-X9 in FIG. 図16(a)は、参考例2に係る発光装置の平面図を示すものである。図16(b)は、参考例2に係る発光装置を図16(a)のX10ーX10線に沿って切断して示す断面図である。FIG. 16A is a plan view of the light emitting device according to Reference Example 2. FIG. FIG. 16B is a cross-sectional view showing the light emitting device according to Reference Example 2 cut along the line X10-X10 in FIG. 図17(a)は、参考例3に係る発光装置の平面図を示すものである。図17(b)は、参考例3に係る発光装置を図17(a)のX11ーX11線に沿って切断して示す断面図である。FIG. 17A is a plan view of the light emitting device according to Reference Example 3. FIG. FIG. 17B is a cross-sectional view showing the light emitting device according to Reference Example 3 cut along line X11-X11 in FIG. 参考例4に係る発光装置の概略構成を示す図である。図18(a)は、発光装置の平面図である。図18(b)は、図18(a)のA1−A1線に沿って切断して示す発光装置の断面図である。It is a figure which shows schematic structure of the light-emitting device which concerns on the reference example 4. FIG. FIG. 18A is a plan view of the light emitting device. FIG. 18B is a cross-sectional view of the light-emitting device, cut along the line A1-A1 in FIG. 参考例4に係る発光装置の基板を説明するための図である。図19(a)は、基板の平面図である。図19(b)は、図19(a)のA2−A2線に沿って切断して示す基板の断面図である。It is a figure for demonstrating the board | substrate of the light-emitting device which concerns on the reference example 4. FIG. FIG. 19A is a plan view of the substrate. FIG. 19B is a cross-sectional view of the substrate cut along the line A2-A2 of FIG. 参考例4に係る発光装置の光束制御部材を示す図である。図20(a)は、光束制御部材の平面図である。図20(b)は、図20(a)のA3−A3線に沿って切断して示す光束制御部材の断面図である。図20(c)は、光束制御部材の裏面図である。It is a figure which shows the light beam control member of the light-emitting device which concerns on the reference example 4. FIG. 20A is a plan view of the light flux controlling member. FIG. 20B is a cross-sectional view of the light flux controlling member cut along the line A3-A3 in FIG. FIG. 20C is a rear view of the light flux controlling member. 参考例4に係る発光装置のスリーブを示す図である。図21(a)は、スリーブの平面図である。図21(b)は、スリーブの正面図である。図21(c)は、スリーブの裏面図である。It is a figure which shows the sleeve of the light-emitting device which concerns on the reference example 4. FIG. FIG. 21A is a plan view of the sleeve. FIG. 21B is a front view of the sleeve. FIG. 21C is a rear view of the sleeve. 図21(a)のA4−A4線に沿って切断して示すスリーブの断面図である。It is sectional drawing of the sleeve cut | disconnected and shown along the A4-A4 line | wire of Fig.21 (a). 図21(b)のA5−A5線に沿って切断して示すスリーブの胴部の断面図である。It is sectional drawing of the trunk | drum of the sleeve cut | disconnected and shown along the A5-A5 line | wire of FIG.21 (b). 参考例4に係る発光装置の組立手順を示す図である。図24(a)は、基板にスリーブ及び光束制御部材を取り付ける前の状態を示す図である。図24(b)は、基板にスリーブを取り付けた状態を示す図である。図24(c)は、基板に取り付けたスリーブで光制御部材を保持した状態を示す図である。It is a figure which shows the assembly procedure of the light-emitting device which concerns on the reference example 4. FIG. FIG. 24A is a diagram showing a state before the sleeve and the light flux controlling member are attached to the substrate. FIG. 24B is a diagram illustrating a state in which a sleeve is attached to the substrate. FIG. 24C is a diagram showing a state where the light control member is held by the sleeve attached to the substrate. 参考例5に係る発光装置の概略構成を示す図である。図25(a)は、発光装置の平面図である。図25(b)は、図25(a)のA6−A6線に沿って切断して示す発光装置の断面図である。It is a figure which shows schematic structure of the light-emitting device which concerns on the reference example 5. FIG. FIG. 25A is a plan view of the light emitting device. FIG. 25B is a cross-sectional view of the light emitting device cut along the line A6-A6 in FIG. 参考例5に係る発光装置のスリーブを示す図である。図26(a)は、スリーブの平面図である。図26(b)は、スリーブの正面図である。図26(c)は、スリーブの裏面図である。It is a figure which shows the sleeve of the light-emitting device which concerns on the reference example 5. FIG. FIG. 26A is a plan view of the sleeve. FIG. 26B is a front view of the sleeve. FIG. 26C is a rear view of the sleeve. 図26(a)のA7−A7線に沿って切断して示すスリーブの断面図である。It is sectional drawing of the sleeve cut | disconnected and shown along the A7-A7 line | wire of Fig.26 (a). 図26(b)のA8−A8線に沿って切断して示すスリーブの胴部の断面図である。It is sectional drawing of the trunk | drum of the sleeve cut | disconnected and shown along the A8-A8 line | wire of FIG.26 (b). 参考例5に係る発光装置の組立手順を示す図である。図29(a)は、基板にスリーブ及び光束制御部材を取り付ける前の状態を示す図である。図29(b)は、基板にスリーブを取り付けた状態を示す図である。図29(c)は、基板に取り付けたスリーブで光制御部材を保持した状態を示す図である。It is a figure which shows the assembly procedure of the light-emitting device which concerns on the reference example 5. FIG. FIG. 29A is a diagram showing a state before the sleeve and the light flux controlling member are attached to the substrate. FIG. 29B is a diagram showing a state where a sleeve is attached to the substrate. FIG. 29C is a diagram showing a state where the light control member is held by the sleeve attached to the substrate. 参考例5に係る発光装置の変形例を示す図であり、図25(b)に示した発光装置の一部を変更した態様を示す図である。It is a figure which shows the modification of the light-emitting device which concerns on the reference example 5, and is a figure which shows the aspect which changed a part of light-emitting device shown in FIG.25 (b). 従来技術に係る照明装置の平面図である。It is a top view of the illuminating device which concerns on a prior art. 従来技術に係る発光装置からレンズを取り外した状態を示す図である。It is a figure which shows the state which removed the lens from the light-emitting device which concerns on a prior art. 図33(a)は、従来技術に係る照明具において、ホルダが基板に対して収縮した状態を示す図である。図33(b)は、従来技術に係る照明具において、ホルダが基板に対して膨張した状態を示す図である。Fig.33 (a) is a figure which shows the state which the holder shrunk with respect to the board | substrate in the lighting fixture which concerns on a prior art. FIG. 33B is a diagram illustrating a state in which the holder is expanded with respect to the substrate in the lighting device according to the related art.

<実施形態1>
以下、本発明が適用可能な表示装置1、面光源装置2及び発光装置3の実施の形態を図面に基づいて説明する。
<Embodiment 1>
Embodiments of a display device 1, a surface light source device 2, and a light emitting device 3 to which the present invention can be applied will be described below with reference to the drawings.

(表示装置、面光源装置及び発光装置の概略構成)
図1乃至図3は、本実施の形態に係る表示装置1、この表示装置1を構成する面光源装置2及び面光源装置2を構成する発光装置3を示すものである。なお、図1は、被照明部材(例えば、液晶表示パネル)4と光拡散部材11を取り外して示す表示装置1の平面図(面光源装置2の平面図)である。また、図2は、表示装置1の概略を示す断面図であり、図1のX1−X1線に沿って切断して示す表示装置1の断面図である。また、図3(a)は、実施形態1に係る発光装置3の平面図である。図3(b)は、図3(a)のX2−X2線に沿って切断して示す発光装置3の断面図である。
(Schematic configuration of display device, surface light source device, and light emitting device)
1 to 3 show a display device 1 according to the present embodiment, a surface light source device 2 constituting the display device 1 and a light emitting device 3 constituting the surface light source device 2. FIG. 1 is a plan view (plan view of the surface light source device 2) of the display device 1 with the illuminated member (for example, a liquid crystal display panel) 4 and the light diffusion member 11 removed. 2 is a cross-sectional view schematically showing the display device 1, and is a cross-sectional view of the display device 1 cut along the line X1-X1 in FIG. FIG. 3A is a plan view of the light emitting device 3 according to the first embodiment. FIG. 3B is a cross-sectional view of the light emitting device 3 cut along the line X2-X2 in FIG.

これらの図に示すように、本実施形態1の表示装置1は、平面形状が略矩形形状の基板5と、基板5の表面にほぼ等間隔に複数取り付けられた点光源としての発光素子6(例えば、LED)6と、発光素子6と一対一となるように取り付けられて発光素子6からの光を拡げて出射する光束制御部材7と、発光素子6を取り囲み且つ光束制御部材7の裏面8に対向するように基板5の表面に載置されたシート部材10と、各光束制御部材7に対向するように配置された光拡散部材11と、光拡散部材11の出射面側に対向配置された被照明部材(例えば、液晶パネル)4と、を備えている。   As shown in these drawings, the display device 1 according to the first embodiment includes a substrate 5 having a substantially rectangular planar shape, and a light emitting element 6 (a plurality of point light sources attached to the surface of the substrate 5 at substantially equal intervals). For example, the LED 6, a light flux control member 7 that is attached to the light emitting element 6 so as to be in one-to-one correspondence, and spreads and emits light from the light emitting element 6; The sheet member 10 placed on the surface of the substrate 5 so as to face the light, the light diffusing member 11 arranged so as to face each light flux controlling member 7, and the light diffusing member 11 faced on the emission surface side. And a member to be illuminated (for example, a liquid crystal panel) 4.

なお、本実施の形態においては、基板5、シート部材10、発光素子6、光束制御部材7及び光拡散部材11によって面光源装置2が構成されている。また、基板5、シート部材10、発光素子6及び光束制御部材7によって発光装置3が構成されている。   In the present embodiment, the surface light source device 2 is configured by the substrate 5, the sheet member 10, the light emitting element 6, the light flux control member 7, and the light diffusion member 11. The light emitting device 3 is configured by the substrate 5, the sheet member 10, the light emitting element 6, and the light flux controlling member 7.

(基板)
図1乃至図2を用いて基板5について説明する。基板5は、図1に示す通り略矩形形状となっている。基板5は、その表面に配線パターン(不図示)が形成されている。そして、この配線パターンは、基板5の表面に実装される発光素子6の各電極に接続されるようになっている。また、基板5の裏面には、発光素子6を制御する制御回路(不図示)等が取り付けられるようになっている。本実施形態においては、基板5のうち、線膨張係数が1.2×10-5[1/℃]である基板5を使用した。
(substrate)
The substrate 5 will be described with reference to FIGS. The substrate 5 has a substantially rectangular shape as shown in FIG. The substrate 5 has a wiring pattern (not shown) formed on the surface thereof. The wiring pattern is connected to each electrode of the light emitting element 6 mounted on the surface of the substrate 5. A control circuit (not shown) for controlling the light emitting element 6 is attached to the back surface of the substrate 5. In the present embodiment, among the substrates 5, the substrate 5 having a linear expansion coefficient of 1.2 × 10 −5 [1 / ° C.] was used.

(発光素子)
図2を用いて発光素子6について説明する。図2に示す通り本実施形態において、発光素子6は、表面実装型のLEDが使用される。この発光素子6は、その端子電極(不図示)が基板5の配線パターン上に半田付けされることにより電気的に接続されるようになっている。基板5の表面には、複数の発光素子6がほぼ等間隔で且つマトリックス状に取り付けられる。そして、この複数の発光素子6は、発光素子6を制御する制御回路によりON・OFFされるようになっている。ここで、便宜上、発光素子6からの立体的な出射光束の中心における光の進行方向を発光素子6の光軸L1と定義する。
(Light emitting element)
The light emitting element 6 will be described with reference to FIG. As shown in FIG. 2, in the present embodiment, the light-emitting element 6 is a surface-mounted LED. The light emitting element 6 is electrically connected by soldering terminal electrodes (not shown) on the wiring pattern of the substrate 5. A plurality of light emitting elements 6 are attached to the surface of the substrate 5 in a matrix at substantially equal intervals. The plurality of light emitting elements 6 are turned on and off by a control circuit that controls the light emitting elements 6. Here, for the sake of convenience, the traveling direction of light at the center of the three-dimensional outgoing light beam from the light emitting element 6 is defined as the optical axis L1 of the light emitting element 6.

(光束制御部材)
図4を用いて光束制御部材7について説明する。図4(a)は、実施形態1に係る発光装置3を構成する光束制御部材7の平面図を示す図である。図4(b)は、図4(a)のX3ーX3線に沿って切断して示す光束制御部材7の断面図である。図4(c)は、光束制御部材7の裏面図である。
(Flux control member)
The light flux controlling member 7 will be described with reference to FIG. FIG. 4A is a diagram illustrating a plan view of the light flux controlling member 7 included in the light emitting device 3 according to the first embodiment. FIG. 4B is a cross-sectional view of the light flux controlling member 7 cut along the line X3-X3 in FIG. FIG. 4C is a rear view of the light flux controlling member 7.

光束制御部材7は、図4(a),図4(b),図4(c)に示す通りの形状をしており、例えば、PMMA(ポリメタクリル酸メチル)、PC(ポリカーボネート)、COP(シクロオレフィンポリマー)等の透明な合成樹脂材料を用いて射出成形により一体成形される。本実施形態においては、PMMAのうち、線膨張係数が6.0×10-5[1/℃]であるPMMAを使用した。 The light flux controlling member 7 has a shape as shown in FIGS. 4 (a), 4 (b), and 4 (c). For example, PMMA (polymethyl methacrylate), PC (polycarbonate), COP ( It is integrally formed by injection molding using a transparent synthetic resin material such as cycloolefin polymer. In the present embodiment, PMMA having a linear expansion coefficient of 6.0 × 10 −5 [1 / ° C.] is used among PMMA.

また、光束制御部材7から出射する光の立体的な出射光束の中心における光の進行方向を光束制御部材7の光軸Lと定義する。   Further, the traveling direction of light at the center of the three-dimensional emitted light beam of the light emitted from the light beam control member 7 is defined as the optical axis L of the light beam control member 7.

この光束制御部材7は、発光素子6からの光を取り込む入射面凹部12と、その取り込んだ光を拡げて出射させる光制御出射面13と、この光制御出射面13の径方向外方側に出っ張るように形成された略円環状の鍔部14と、裏面8に突出形成された丸棒状の支持脚15とを有している。   The light flux controlling member 7 includes an incident surface concave portion 12 that captures light from the light emitting element 6, a light control emitting surface 13 that expands and emits the captured light, and a radially outer side of the light control emitting surface 13. It has a substantially annular flange 14 formed so as to protrude, and a round bar-like support leg 15 protruding from the back surface 8.

光制御出射面13は、平面形状が略円形形状であり、発光素子6からの光を発光素子6の直上などで局部的に出射されず、照射範囲内に向けて、光拡散部材11の出射面側から視た状態において均一となるように滑らかに拡げて出射させるようになっている。そして、光束制御部材7が複数基板5の表面に並べて取り付けられると、この光制御出射面13から出射された光の少なくとも一部は、他の光束制御部材7の光制御部から出射された光と重ね合わせるようになっている。   The light control emission surface 13 has a substantially circular planar shape, and the light from the light emitting element 6 is not emitted locally, for example, directly above the light emitting element 6, but is emitted from the light diffusion member 11 toward the irradiation range. The light is smoothly spread and emitted so as to be uniform when viewed from the surface side. When the light flux control member 7 is mounted side by side on the surface of the plurality of substrates 5, at least a part of the light emitted from the light control emission surface 13 is emitted from the light control unit of the other light flux control member 7. It is supposed to overlap with.

入射面凹部12は、図4(b)及び図4(c)に示す通り、平面形状が略円形形状となっている光束制御部材7の裏面8に形成される。入射面凹部12は、図4(b)に示す通り、先端が丸みを帯びた略砲弾形状の凹みであって裏面8の中心に形成されている。また、入射面凹部12は、光束制御部材7の断面図で視ると、楕円を短軸に沿って切断した半楕円形状のようになっており、光束制御部材7の光軸Lに対して回転対称となっている。この入射面凹部12を光束制御部材7の裏面8側から視た中心は、光束制御部材7の光軸Lと一致している。そして、光束制御部材7が発光素子6に対して位置決めされた際には、入射面凹部12の中心が、発光素子6の光軸L1とほぼ合致するように位置合わせされる。このように位置決めされた入射面凹部12は、発光素子6からの大半の光を取り込むようになっている。   As shown in FIGS. 4B and 4C, the incident surface recess 12 is formed on the back surface 8 of the light flux controlling member 7 whose planar shape is a substantially circular shape. As shown in FIG. 4B, the entrance surface recess 12 is a substantially bullet-shaped recess with a rounded tip and is formed at the center of the back surface 8. Further, the incident surface concave portion 12 has a semi-elliptical shape obtained by cutting an ellipse along the minor axis when viewed in a cross-sectional view of the light flux control member 7, and the light entrance control concave portion 12 has an optical axis L of the light flux control member 7. It is rotationally symmetric. The center of the incident surface recess 12 viewed from the rear surface 8 side of the light flux controlling member 7 coincides with the optical axis L of the light flux controlling member 7. When the light flux controlling member 7 is positioned with respect to the light emitting element 6, the center of the incident surface recess 12 is aligned so as to substantially match the optical axis L 1 of the light emitting element 6. The entrance surface recess 12 positioned in this way takes in most of the light from the light emitting element 6.

図4(a)、図4(b)、図4(c)を用いて光束制御部材7の裏面8に突出形成された支持脚15について説明する。図4(c)に示すように、光束制御部材7の裏面8で、且つ、入射面凹部12よりも径方向外方側には、光束制御部材7の裏面8に対して垂直方向に突出する支持脚15が形成されている。この支持脚15は、丸棒形状となっており、光束制御部材7の光軸Lと同心の仮想円周上に不等ピッチで三本突出形成されている。   The support legs 15 formed to protrude from the back surface 8 of the light flux controlling member 7 will be described with reference to FIGS. 4 (a), 4 (b), and 4 (c). As shown in FIG. 4C, the light beam control member 7 protrudes in the direction perpendicular to the back surface 8 of the light beam control member 7 on the back surface 8 of the light beam control member 7 and on the radially outer side of the entrance surface recess 12. Support legs 15 are formed. The support legs 15 have a round bar shape, and three protrusions 15 are formed at an unequal pitch on a virtual circumference concentric with the optical axis L of the light flux controlling member 7.

図4(a)において、三本の支持脚15(15a、15b、15c)は、光軸Lを中心として、支持脚15(15a)が時計の十二時の方向に位置しているとすると、支持脚15(15b)が五時の方向に位置し、支持脚15(15c)が七時の方向に位置するように形成されている。言い換えると、光束制御部材7の光軸Lを中心とし、支持脚15(15a)を基準とすると、支持脚15(15b)は時計回りに150度移動させた位置に、支持脚15(15c)は時計回りに210度移動させた位置に形成されている。   In FIG. 4A, it is assumed that the three support legs 15 (15a, 15b, 15c) are located around the optical axis L and the support legs 15 (15a) are positioned in the twelve o'clock direction of the watch. The support leg 15 (15b) is positioned in the 5 o'clock direction, and the support leg 15 (15c) is positioned in the 7 o'clock direction. In other words, if the support leg 15 (15a) is based on the optical axis L of the light flux controlling member 7, and the support leg 15 (15b) is moved clockwise by 150 degrees, the support leg 15 (15c) Is formed at a position moved 210 degrees clockwise.

図4(b)に示す通り、三本の支持脚15は、基板5の表面に固着される支持脚15(15b、15c)の長さとシート部材10に固着される支持脚15(15a)の長さを比較すると、基板5の表面に固着される支持脚15(15b、15c)の長さがシート部材10の厚さε分だけ、シート部材10に固着される支持脚15(15a)の長さよりも長くなっている。これにより、光束制御部材7の裏面8は、シート部材10の表面に対して平行となるように、支持脚15によって支持されるようになっている。   As shown in FIG. 4B, the three support legs 15 include the length of the support legs 15 (15b, 15c) fixed to the surface of the substrate 5 and the length of the support legs 15 (15a) fixed to the sheet member 10. Comparing the length, the length of the support leg 15 (15b, 15c) fixed to the surface of the substrate 5 is equal to the thickness ε of the sheet member 10, and the length of the support leg 15 (15a) fixed to the sheet member 10 is the same. It is longer than the length. Accordingly, the back surface 8 of the light flux controlling member 7 is supported by the support legs 15 so as to be parallel to the surface of the sheet member 10.

このような三本の支持脚15は、図3(b)に示す通り、光束制御部材7の入射面凹部12が、発光素子6の直上に位置するように(光束制御部材7の光軸Lと発光素子の光軸L1とが、ほぼ合致する位置にあるように)、支持脚15(15a)がシート部材10に固着され、支持脚15(15b、15c)が基板5の表面に固着されるようになっている。このとき、支持脚15(15b、15c)は、後述するシート部材10の係合穴17と係合し、この係合穴17を介して基板5の表面に固着されるようになっている。   As shown in FIG. 3B, such three support legs 15 are arranged such that the incident surface concave portion 12 of the light beam control member 7 is located immediately above the light emitting element 6 (the optical axis L of the light beam control member 7). And the optical axis L1 of the light emitting element are substantially aligned with each other), the support leg 15 (15a) is fixed to the sheet member 10, and the support leg 15 (15b, 15c) is fixed to the surface of the substrate 5. It has become so. At this time, the support leg 15 (15b, 15c) is engaged with an engagement hole 17 of the sheet member 10 to be described later, and is fixed to the surface of the substrate 5 through the engagement hole 17.

図6を用いて、光束制御部材7の支持脚15を基板5の表面に対して接着する様子を説明する。図6は、光束制御部材7の支持脚15を接着剤18により接着した様子を模式的に表す図である。支持脚15を基板5及びシート部材10に接着する際には、エポキシ性の熱硬化樹脂(接着剤18)を基板5及びシート部材10に対して塗布し、加熱圧着して接着される。   The manner in which the support leg 15 of the light flux controlling member 7 is bonded to the surface of the substrate 5 will be described with reference to FIG. FIG. 6 is a diagram schematically illustrating a state in which the support leg 15 of the light flux controlling member 7 is bonded with the adhesive 18. When the support leg 15 is bonded to the substrate 5 and the sheet member 10, an epoxy thermosetting resin (adhesive 18) is applied to the substrate 5 and the sheet member 10, and is bonded by thermocompression bonding.

支持脚15は、基板5及びシート部材10に接着固定されると光束制御部材7の裏面8とシート部材10との間に隙間が生じるようになっている(図2参照)。そして、その隙間は、発光素子6から発する熱を逃がすようになっている。   When the support leg 15 is bonded and fixed to the substrate 5 and the sheet member 10, a gap is formed between the back surface 8 of the light flux controlling member 7 and the sheet member 10 (see FIG. 2). The gap is designed to release heat generated from the light emitting element 6.

(シート部材)
図2乃至図3を用いて、シート部材10について説明する。図2に示す通り、シート部材10は発光素子6を取り囲み且つ光束制御部材7の裏面8に対向するように基板5の表面に載置される。
(Sheet material)
The sheet member 10 will be described with reference to FIGS. As shown in FIG. 2, the sheet member 10 is placed on the surface of the substrate 5 so as to surround the light emitting element 6 and to face the back surface 8 of the light flux controlling member 7.

シート部材10は、PETシート(ポリエチレンテレフタレートシート)等の光反射特性に優れた樹脂製シートや、樹脂製シートの表面に銀蒸着された反射シートであり、可撓性を有する。またシート部材10は、基板5や光束制御部材7よりも、伸縮性に優れ伸び縮みし易くなっている。このシート部材10は、発光素子6を露出させる円形状の開口部16と、光束制御部材7の支持脚15のうち基板5に取り付けられる支持脚15を通す係合穴17と、が形成されている。   The sheet member 10 is a resin sheet excellent in light reflection characteristics such as a PET sheet (polyethylene terephthalate sheet), or a reflection sheet deposited with silver on the surface of the resin sheet, and has flexibility. The sheet member 10 is more stretchable and easier to expand and contract than the substrate 5 and the light flux controlling member 7. The sheet member 10 is formed with a circular opening 16 through which the light emitting element 6 is exposed, and an engagement hole 17 through which the support leg 15 attached to the substrate 5 among the support legs 15 of the light flux controlling member 7 is passed. Yes.

開口部16は、平面視形状が円形状となっている。そして、開口部は、シート部材10を基板5に載置した際に、基板5に取り付けられた発光素子6を通過させて露出させるようになっている。   The opening 16 has a circular shape in plan view. And when the sheet | seat member 10 is mounted in the board | substrate 5, an opening part lets the light emitting element 6 attached to the board | substrate 5 pass, and is exposed.

係合穴17は、円形状の開口部16と同心の円周上で、且つ、光束制御部材7の入射面凹部12を開口部16のほぼ中心に位置合わせすると光束制御部材7の支持脚15(15b、15c)に対応する位置に形成されている。   The engagement hole 17 is located on the circumference concentric with the circular opening 16, and when the incident surface concave portion 12 of the light flux control member 7 is aligned with the center of the opening 16, the support leg 15 of the light flux control member 7. It is formed at a position corresponding to (15b, 15c).

シート部材10は、光束制御部材7の支持脚15(15b、15c)が、シート部材10の係合穴17に通されて係合し、支持脚15(15a)が、シート部材10の表面に接着されることにより、基板5に対して移動しないように固定される。   In the sheet member 10, the support legs 15 (15 b, 15 c) of the light flux controlling member 7 are engaged through the engagement holes 17 of the sheet member 10, and the support legs 15 (15 a) are placed on the surface of the sheet member 10. By being bonded, the substrate 5 is fixed so as not to move.

そして、このシート部材10は、発光装置3の使用時において、光束制御部材7の裏面8とは反対方向に出射された光及び光束制御部材7の裏面8によって反射された光を反射させて、光束制御部材7の裏面8に送り出すことで照明光として再利用できるようにし、光のロスを減らし輝度を向上させるようになっている。   The sheet member 10 reflects light emitted in a direction opposite to the back surface 8 of the light beam control member 7 and light reflected by the back surface 8 of the light beam control member 7 when the light emitting device 3 is used. By sending it to the back surface 8 of the light flux controlling member 7, it can be reused as illumination light, reducing light loss and improving luminance.

本実施形態においては、シート部材10のうち、線膨張係数が4.0×10-5[1/℃])であるシート部材10を使用した。 In the present embodiment, the sheet member 10 having a linear expansion coefficient of 4.0 × 10 −5 [1 / ° C.] is used among the sheet members 10.

(光拡散部材)
図2を用いて光拡散部材11について説明する。図2に示す通り、光拡散部材11は、光束制御部材7の光制御出射面13に対向し、且つ、基板5及びシート部材10に対して平行となるように配置される。この光拡散部材11は、光透過性に優れたPMMAやPC等の樹脂材料によってシート状あるいは平板形状に形成されており、被照明部材4の平面形状とほぼ同様の大きさ(面積)に形成されている。
(Light diffusion member)
The light diffusion member 11 will be described with reference to FIG. As shown in FIG. 2, the light diffusion member 11 is disposed so as to face the light control emission surface 13 of the light flux control member 7 and to be parallel to the substrate 5 and the sheet member 10. The light diffusing member 11 is formed in a sheet shape or a flat plate shape from a resin material such as PMMA or PC having excellent light transmittance, and is formed in a size (area) substantially the same as the planar shape of the illuminated member 4. Has been.

光拡散部材11は、その表面に微細な凹凸(プリズム状突起、エンボス加工やビーズコートによる拡散処理で形成される凹凸)を形成するか、又は内部に拡散材を混入させるようになっている。   The light diffusing member 11 is formed with fine irregularities (prism-like projections, irregularities formed by diffusion processing by embossing or bead coating) on the surface thereof, or a diffusing material is mixed inside.

このような光拡散部材11は、光束制御部材7の光制御出射面13から出射した光を透過しながら拡散し、被照明部材4に照射される光を均一化する。   Such a light diffusing member 11 diffuses the light emitted from the light control emitting surface 13 of the light flux controlling member 7 while transmitting it, and makes the light irradiated to the illuminated member 4 uniform.

また、このような光拡散部材11は、被照明部材4の発光素子6側の面に取り付けても良いし、また、被照明部材4とは分離した状態で、被照明部材4の発光素子6に対向する面側に配置するようにしてもよい。   Such a light diffusing member 11 may be attached to the surface of the illuminated member 4 on the light emitting element 6 side, or in a state separated from the illuminated member 4, the light emitting element 6 of the illuminated member 4. You may make it arrange | position on the surface side which opposes.

(本実施形態に係る発光装置の特徴)
図3、図5、図7、図8を用いて発光装置3について説明する。図5(a)は、光束制御部材7の裏面8に不等間隔で形成された支持脚15が、熱膨張により変位する様子を模式的に示した図である。図5(b)は、光束制御部材7の裏面8に等間隔で形成された支持脚15が、熱膨張により変位する様子を模式的に示した図である。図7は、発光装置3の使用により、光束制御部材7及びシート部材10が熱膨張した様子を示す図である。図7において点線で示す形状は、膨張後の光束制御部材7とシート部材10の様子を模式的に示したものである。図8は、本実施形態に使用される各部材と線膨張係数との関係を示した図である。
(Characteristics of light emitting device according to this embodiment)
The light emitting device 3 will be described with reference to FIGS. 3, 5, 7, and 8. FIG. 5A is a diagram schematically showing how the support legs 15 formed at unequal intervals on the back surface 8 of the light flux controlling member 7 are displaced by thermal expansion. FIG. 5B is a diagram schematically showing how the support legs 15 formed at equal intervals on the back surface 8 of the light flux controlling member 7 are displaced due to thermal expansion. FIG. 7 is a diagram illustrating a state in which the light flux controlling member 7 and the sheet member 10 are thermally expanded by using the light emitting device 3. The shape indicated by the dotted line in FIG. 7 schematically shows the state of the light flux controlling member 7 and the sheet member 10 after expansion. FIG. 8 is a diagram showing the relationship between each member used in the present embodiment and the linear expansion coefficient.

図3に示す通り、発光装置3は、発光素子6が取り付けられた基板5の表面に、シート部材10が載置され、シート部材10の開口部16から露出する発光素子6の直上に光束制御部材7の入射面凹部12が位置するように光束制御部材7が取り付けられる。光束制御部材7の三本の支持脚15は、そのうち二本の支持脚15(15b、15c)がシート部材10の係合穴17を通って基板5の表面に接着され、他の一本の支持脚15(15a)がシート部材10の表面に接着されるようになっている。   As shown in FIG. 3, in the light emitting device 3, the sheet member 10 is placed on the surface of the substrate 5 to which the light emitting element 6 is attached, and the light flux control is performed immediately above the light emitting element 6 exposed from the opening 16 of the sheet member 10. The light flux controlling member 7 is attached so that the incident surface recess 12 of the member 7 is located. Of the three support legs 15 of the light flux controlling member 7, two of the support legs 15 (15b, 15c) are bonded to the surface of the substrate 5 through the engagement holes 17 of the sheet member 10, and the other support leg 15 is attached. The support legs 15 (15a) are bonded to the surface of the sheet member 10.

この発光装置3は、発光素子6を長時間点灯させた際に、基板5の配線パターンを流れる電流の電気抵抗によってジュール熱が発生する。このジュール熱は、基板5の温度を上昇させ、基板5の表面に取り付けられている光束制御部材7と基板5に対して載置されているシート部材10の温度を上昇させる。   In the light emitting device 3, when the light emitting element 6 is lit for a long time, Joule heat is generated by the electric resistance of the current flowing through the wiring pattern of the substrate 5. The Joule heat increases the temperature of the substrate 5 and increases the temperature of the light flux controlling member 7 attached to the surface of the substrate 5 and the sheet member 10 placed on the substrate 5.

図8に示す通り、発光装置3を構成する基板5、シート部材10、光束制御部材7は、線膨張係数が異なっている。発光装置3を構成する各部材は、それぞれの線膨張係数に比例して、熱膨張するようになっている。ここで、光束制御部材7の線膨張係数は、基板5の線膨張係数の5倍となっている。   As shown in FIG. 8, the substrate 5, the sheet member 10, and the light beam control member 7 constituting the light emitting device 3 have different linear expansion coefficients. Each member which comprises the light-emitting device 3 is thermally expanded in proportion to each linear expansion coefficient. Here, the linear expansion coefficient of the light flux controlling member 7 is five times the linear expansion coefficient of the substrate 5.

一般に、線膨張係数の異なる部材を組み合わせて構成する場合は、温度変化による線膨張係数の違いから、部材の一部にひずみの発生等の不具合を起こす原因となっている。例えば、基板5の表面に対して、支持脚15が等間隔に形成された光束制御部材7(図5(b)参照)を配置し、その支持脚15を基板5の表面に接着した場合、支持脚15にひずみが発生し易くなっている。すなわち、光束制御部材7の裏面8に等間隔に形成された支持脚15は、熱膨張すると、図5(b)の点線で示す通り、光束制御部材7の径方向外方へ向かって変位する。このとき、基板5は、光束制御部材7と比較して熱膨張し難いため、光束制御部材7の支持脚15にひずみが発生する。そして、支持脚15には、もとに戻ろうと応力が作用する。この応力は、基板5に接着された支持脚15を、基板5から剥がすような不具合を発生させる。   In general, in the case where a combination of members having different linear expansion coefficients is used, a difference in linear expansion coefficient due to a temperature change causes a problem such as generation of strain in a part of the member. For example, when the light beam control member 7 (see FIG. 5B) in which the support legs 15 are formed at equal intervals is arranged on the surface of the substrate 5, and the support legs 15 are bonded to the surface of the substrate 5, The support leg 15 is easily distorted. That is, the support legs 15 formed at equal intervals on the back surface 8 of the light flux controlling member 7 are displaced outward in the radial direction of the light flux controlling member 7 as indicated by the dotted line in FIG. . At this time, since the substrate 5 is less likely to thermally expand as compared with the light flux control member 7, distortion occurs in the support leg 15 of the light flux control member 7. Then, stress acts on the support leg 15 to return to the original state. This stress causes a problem that the support leg 15 bonded to the substrate 5 is peeled off from the substrate 5.

以上のような不具合が発生しないように、本実施形態に係る発光装置3は、以下に述べる点に特徴を有している。   The light emitting device 3 according to the present embodiment is characterized in the following points so that the above problems do not occur.

本実施形態に係る光束制御部材7の裏面8に形成された三本の支持脚15のうち、支持脚15(15a)については、図7に示す通り、基板5の線膨張係数と比較して、光束制御部材7の線膨張係数に近い線膨張係数のシート部材10に接着している。   Of the three support legs 15 formed on the back surface 8 of the light flux controlling member 7 according to the present embodiment, the support legs 15 (15a) are compared with the linear expansion coefficient of the substrate 5 as shown in FIG. The sheet member 10 having a linear expansion coefficient close to that of the light flux controlling member 7 is adhered.

そして、他の二本の支持脚15(15b、15c)は、図5(a)に示す通り、支持脚15(15b)と支持脚15(15c)の周方向の間隔を、等間隔に形成した場合よりも、狭くし、基板5の表面にシート部材10の係合穴17を介して接着するようになっている。   The other two support legs 15 (15b, 15c) are formed at equal intervals in the circumferential direction between the support legs 15 (15b) and the support legs 15 (15c) as shown in FIG. It is made narrower than the case, and it adheres to the surface of the substrate 5 through the engagement hole 17 of the sheet member 10.

図7に示す通り、シート部材10は、熱膨張することにより、このシート部材10に接着される支持脚(第2の支持脚)15(15a)と基板5に接着される二本の支持脚(第1の支持脚)15(15b、15c)との支持脚間距離の増加を許容するように基板5に対して変位するようになっている。   As shown in FIG. 7, the sheet member 10 is thermally expanded, thereby supporting legs (second supporting legs) 15 (15 a) bonded to the sheet member 10 and two supporting legs bonded to the substrate 5. The first support leg 15 is displaced with respect to the substrate 5 so as to allow an increase in the distance between the support legs with respect to the 15 (15b, 15c).

そして、図5(a)、(b)に示す通り、基板5に接着された二本の支持脚15(15b、15c)の支持脚間距離S1は、支持脚15を光束制御部材7の光軸Lを中心として周方向に等間隔に三本形成した場合の支持脚間距離S2と比較して、支持脚間距離が小さくなっている。これにより、光束制御部材7が熱膨張した際、本実施形態に係る支持脚間距離S1の増加量(S1’−S1)は、等間隔に三本の支持脚15を形成した場合の支持脚間距離S2の増加量(S2’−S2)と比較して、小さくなっている。   Then, as shown in FIGS. 5A and 5B, the distance S1 between the support legs 15 of the two support legs 15 (15b and 15c) bonded to the substrate 5 is the light of the light flux controlling member 7 by the support legs 15. The distance between the support legs is smaller than the distance S2 between the support legs when three are formed at equal intervals in the circumferential direction with the axis L as the center. Thereby, when the light flux controlling member 7 is thermally expanded, the increase amount (S1′−S1) of the distance S1 between the support legs according to the present embodiment is the support leg when the three support legs 15 are formed at equal intervals. It is smaller than the increase amount (S2′−S2) of the inter-distance S2.

(本実施形態による効果)
本実施形態に係る光束制御部材7の三本の支持脚15は、支持脚15(15a)が、基板5と比較して光束制御部材7の線膨張係数に近い線膨張係数のシート部材10に対して接着される。このシート部材10は、熱膨張することにより、シート部材10に接着された支持脚15(15a)と基板5に接着される支持脚15(15b、15c)との支持脚間距離の増大を吸収するように基板5に対して変位し、支持脚15(15a、15b、15c)のひずみを緩和することができる。
(Effects of this embodiment)
The three support legs 15 of the light flux controlling member 7 according to the present embodiment are such that the support leg 15 (15a) is a sheet member 10 having a linear expansion coefficient that is closer to the linear expansion coefficient of the light flux controlling member 7 than the substrate 5. Adhered to. This sheet member 10 absorbs an increase in the distance between the support legs between the support legs 15 (15a) bonded to the sheet member 10 and the support legs 15 (15b, 15c) bonded to the substrate 5 by thermal expansion. As described above, the substrate 5 is displaced so that the distortion of the support legs 15 (15a, 15b, 15c) can be reduced.

そして、他の二本の支持脚15(15b、15c)は、基板5の表面に対して接着される。この二本の支持脚15(15b、15c)は、光束制御部材7の裏面8に対して等間隔に三本の支持脚15を形成した場合と比較して、熱膨張に起因する支持脚間距離の増大が少なくなるように形成されている。これにより、基板5に接着された二本の支持脚は、等間隔に支持脚15を三本形成した場合と比較して、基板5に接着された支持脚15(15b、15c)に発生するひずみを緩和することができる。   The other two support legs 15 (15b, 15c) are bonded to the surface of the substrate 5. Compared with the case where the three support legs 15 are formed at equal intervals with respect to the back surface 8 of the light flux controlling member 7, the two support legs 15 (15b, 15c) are provided between the support legs due to thermal expansion. It is formed so as to reduce the increase in distance. Thus, the two support legs bonded to the substrate 5 are generated on the support legs 15 (15b, 15c) bonded to the substrate 5 as compared with the case where three support legs 15 are formed at equal intervals. The strain can be relaxed.

以上により、本実施形態に係る光束制御部材7の支持脚15は、その指示脚15に発生するひずみをシート部材10により緩和し、支持脚15に発生する応力を小さくすることができる。これにより、照明品位を低下させる要因となるような部品を使用することなく、光束制御部材7を基板5の表面に位置決めした状態で安定して固定することができる。   As described above, the support leg 15 of the light flux controlling member 7 according to the present embodiment can relieve the distortion generated in the indicating leg 15 by the sheet member 10 and reduce the stress generated in the support leg 15. Thereby, the light flux controlling member 7 can be stably fixed in a state where the light flux controlling member 7 is positioned on the surface of the substrate 5 without using a component that causes a reduction in illumination quality.

<実施形態2>
図9乃至図10を用いて、実施形態2に係る発光装置3について説明する。なお、実施形態2は、光束制御部材7の支持脚15とシート部材10の係合穴17とが隙間を持って遊嵌することを除き、その基本的構成が上記実施形態1と同様であるため、上記実施形態1と同様の構成には同一の符号を付し、上記実施形態1の説明と重複することになる説明を省略する。図9(a)は、実施形態2に係る発光装置3の平面図を示すものである。図9(b)は、実施形態2に発光装置3を図9(a)のX4ーX4線に沿って切断して示す断面図である。図10は、シート部材10が、基板5に対してスライド移動し、支持脚15の変位量を緩和する様子を模式的に示した図である。図10において、点線で示す形状は、膨張後の光束制御部材7と基板5に対してスライド移動したシート部材10の様子を模式的に示しものである。
<Embodiment 2>
The light emitting device 3 according to the second embodiment will be described with reference to FIGS. 9 to 10. The basic configuration of the second embodiment is the same as that of the first embodiment except that the support leg 15 of the light flux controlling member 7 and the engagement hole 17 of the sheet member 10 are loosely fitted with a gap. Therefore, the same components as those in the first embodiment are denoted by the same reference numerals, and descriptions that overlap with those in the first embodiment are omitted. FIG. 9A shows a plan view of the light emitting device 3 according to the second embodiment. FIG. 9B is a cross-sectional view of the light emitting device 3 according to the second embodiment cut along line X4-X4 in FIG. 9A. FIG. 10 is a diagram schematically showing how the sheet member 10 slides with respect to the substrate 5 and relaxes the amount of displacement of the support leg 15. In FIG. 10, the shape indicated by the dotted line schematically shows the state of the sheet member 10 slidably moved with respect to the expanded light flux controlling member 7 and the substrate 5.

図9(a)及び図9(b)に示す通り、シート部材10には、光束制御部材7の支持脚15のうち基板5に取り付けられる支持脚15(15b、15c)と、隙間を持って遊嵌する係合穴17が形成されている。   9A and 9B, the sheet member 10 has a gap with the support legs 15 (15b, 15c) attached to the substrate 5 among the support legs 15 of the light flux controlling member 7. An engagement hole 17 for loose fitting is formed.

支持脚15(15b、15c)は、シート部材10の係合穴17と隙間を持って遊嵌して基板5に接着される。支持脚15(15a)は、シート部材10の表面に接着される。以上により、シート部材10は、基板5に対して、移動できないように固定される。   The support legs 15 (15b, 15c) are loosely fitted with the engagement holes 17 of the sheet member 10 and are bonded to the substrate 5. The support leg 15 (15a) is bonded to the surface of the sheet member 10. As described above, the sheet member 10 is fixed so as not to move with respect to the substrate 5.

先に述べた通り、光束制御部材7の裏面8に形成された三本の支持脚15は、図5(a)に示すように、熱膨張に伴い支持脚15の位置が変位するようになっている。本実施形態に係る支持脚15(15a)も、支持脚15(15b、15c)が基板5の表面に対して接着されるため、図10におけるY方向へ変位するようになっている。   As described above, as shown in FIG. 5A, the three support legs 15 formed on the back surface 8 of the light flux controlling member 7 are displaced in position with the thermal expansion. ing. The support leg 15 (15a) according to the present embodiment is also displaced in the Y direction in FIG. 10 because the support leg 15 (15b, 15c) is bonded to the surface of the substrate 5.

図10に示す通り、支持脚15(15b、15c)とシート部材10の係合穴17とは、隙間を持って遊嵌している。これにより、シート部材10に接着される支持脚15(15a)がY方向へ変位すると、支持脚15(15a)に接着されたシート部材10が、支持脚15(15b、15c)と係合穴17との隙間分だけ、Y方向へスライド移動することできるようになっている。   As shown in FIG. 10, the support legs 15 (15b, 15c) and the engagement holes 17 of the sheet member 10 are loosely fitted with a gap. Accordingly, when the support leg 15 (15a) bonded to the sheet member 10 is displaced in the Y direction, the sheet member 10 bonded to the support leg 15 (15a) is engaged with the support leg 15 (15b, 15c). 17 can be slid in the Y direction by the gap with respect to 17.

以上により、シート部材10は、シート部材10に接着された支持脚15(15a)と基板5に接着された支持脚15(15b、15c)との支持脚間距離の増加を吸収することができる。   As described above, the sheet member 10 can absorb an increase in the distance between the support legs between the support legs 15 (15a) bonded to the sheet member 10 and the support legs 15 (15b and 15c) bonded to the substrate 5. .

ここで隙間とは、加工誤差や組み立て誤差があっても、支持脚15(15b、15c)と係合穴17との間に隙間が生じる程度の大きさをいう。   Here, the gap means a size such that a gap is generated between the support leg 15 (15b, 15c) and the engagement hole 17 even if there is a processing error or an assembly error.

なお、本実施形態においては、シート部材10がスライド移動することにより、シート部材10に接着される支持脚15(15a)と基板5に接着される支持脚15(15b、15c)との支持脚間距離の増加を吸収することができる。これにより、支持脚間距離の増加のすべてを吸収できる場合は、シート部材10の線膨張係数を基板5と比較して光束制御部材7の線膨張係数に近い値である必要はない。   In this embodiment, when the sheet member 10 slides, the support legs 15 (15a) bonded to the sheet member 10 and the support legs 15 (15b, 15c) bonded to the substrate 5 are supported. The increase in the distance can be absorbed. Thus, when all of the increase in the distance between the support legs can be absorbed, the linear expansion coefficient of the sheet member 10 does not need to be a value close to the linear expansion coefficient of the light beam control member 7 compared to the substrate 5.

(本実施形態による効果)
基板5に接着された支持脚15は、シート部材10の係合穴17と隙間を持って遊嵌しシート部材10に接着された支持脚15(15a)の変位に伴い基板5の表面を支持脚15(15a)と係合穴17との隙間分だけスライド移動することができる。これにより、シート部材10に接着される支持脚15(15a)と基板5に接着される支持脚15(15b、15c)との支持脚間距離の増加を吸収(支持脚15のひずみ量を緩和)することができる。すなわち、シート部材10と光束制御部材7との線膨張率の差に起因する応力を実施形態1と比較してより小さくすることができる。以上により、実施形態1と比較して、支持脚15がより基板5の表面から外れ難くなる。
(Effects of this embodiment)
The support leg 15 bonded to the substrate 5 is loosely fitted with a gap with the engagement hole 17 of the sheet member 10 and supports the surface of the substrate 5 as the support leg 15 (15a) bonded to the sheet member 10 is displaced. The sliding movement can be made by the gap between the leg 15 (15a) and the engagement hole 17. As a result, the increase in the distance between the support legs between the support legs 15 (15a) bonded to the sheet member 10 and the support legs 15 (15b, 15c) bonded to the substrate 5 is absorbed (the strain amount of the support legs 15 is reduced). )can do. That is, the stress caused by the difference in linear expansion coefficient between the sheet member 10 and the light flux controlling member 7 can be made smaller than that in the first embodiment. As described above, the support legs 15 are less likely to be detached from the surface of the substrate 5 as compared with the first embodiment.

<実施形態3>
図11を用いて、実施形態3について説明する。なお、本実施形態は、光束制御部材7の支持脚15と基板5とを除き、その基本的構成が上記実施形態1の発光装置3と同様であるため、上記実施形態1と同様の構成には同一の符号を付し、上記実施形態1の説明と重複することになる説明を省略する。図11(a)は、実施形態3に係る発光装置3の平面図を示すものである。図11(b)は、実施形態3に係る発光装置3を図11(a)のX5ーX5線に沿って切断して示す断面図である。
<Embodiment 3>
Embodiment 3 will be described with reference to FIG. In this embodiment, the basic configuration is the same as that of the light-emitting device 3 of the first embodiment except for the support leg 15 and the substrate 5 of the light flux controlling member 7, and thus the same configuration as that of the first embodiment is used. Are denoted by the same reference numerals, and the description that overlaps the description of the first embodiment is omitted. FIG. 11A shows a plan view of the light emitting device 3 according to the third embodiment. FIG. 11B is a cross-sectional view showing the light emitting device 3 according to Embodiment 3 cut along line X5-X5 in FIG.

基板5は、その表面側に開口し光束制御部材7の支持脚15が挿入される位置決め凹部21と、基板5に載置されたシート部材10の四隅が基板5の表面から離れないよう押さえるコーナー押さえ部22と、が形成されている。   The substrate 5 has a positioning recess 21 that opens on the surface side and into which the support leg 15 of the light flux controlling member 7 is inserted, and a corner that holds the four corners of the sheet member 10 placed on the substrate 5 so as not to separate from the surface of the substrate 5. A pressing portion 22 is formed.

位置決め凹部21は、基板5に取り付けられた発光素子6の光軸L1を中心とする同一円上で、且つ、光束制御部材7の支持脚15(15b、15c)が、対応する位置に形成されている。   The positioning recess 21 is formed on the same circle with the optical axis L1 of the light emitting element 6 attached to the substrate 5 as the center, and the support legs 15 (15b, 15c) of the light flux controlling member 7 are formed at corresponding positions. ing.

コーナー押さえ部22は、基板5の表面における四隅に形成され、基板5の中央に向かって開口し、シート部材10の隅が挿入されるようになっている。このコーナー押さえ部22は、基板5の表面にシート部材10が載置された際に、シート部材10の四隅が、基板5の表面から離れないように押さえるようになっている。   The corner pressing portions 22 are formed at the four corners on the surface of the substrate 5 and open toward the center of the substrate 5 so that the corners of the sheet member 10 are inserted. The corner pressing portions 22 are configured to hold the four corners of the sheet member 10 so as not to be separated from the surface of the substrate 5 when the sheet member 10 is placed on the surface of the substrate 5.

光束制御部材7は、光束制御部材7の裏面8に形成された三本の支持脚15のうち、基板5に取り付けられる支持脚15(15b、15c)の径の大きさが、支持脚15の長手方向のほぼ中間点で異なっている。支持脚15(15b、15c)は、光束制御部材7の裏面8から離れる方向へ、径の大きな大径部23と、径の小さな小径部24とを有している。支持脚15は、光束制御部材7を裏面視すると、大径部23と小径部24との境目に円環状の平坦面25が形成されている。   Of the three support legs 15 formed on the back surface 8 of the light beam control member 7, the light beam control member 7 has a diameter of the support legs 15 (15 b and 15 c) attached to the substrate 5. It differs at approximately the midpoint in the longitudinal direction. The support leg 15 (15b, 15c) has a large diameter portion 23 having a large diameter and a small diameter portion 24 having a small diameter in a direction away from the back surface 8 of the light flux controlling member 7. The support leg 15 is formed with an annular flat surface 25 at the boundary between the large diameter portion 23 and the small diameter portion 24 when the light flux controlling member 7 is viewed from the back.

支持脚15(15b、15c)は、基板5の表面に載置されたシート部材10の係合穴17と小径部の一部とが係合して支持脚15(15b、15c)が基板5に接着されると、シート部材10が、支持脚15(15b、15c)の平坦面25と基板5の表面とで挟み込まれるようになっている。   The support leg 15 (15b, 15c) is engaged with the engagement hole 17 of the sheet member 10 placed on the surface of the substrate 5 and a part of the small diameter portion, so that the support leg 15 (15b, 15c) is the substrate 5. The sheet member 10 is sandwiched between the flat surface 25 of the support leg 15 (15b, 15c) and the surface of the substrate 5.

光束制御部材7は、支持脚15(15a)がシート部材10に接着され、支持脚15(15b、15c)が位置決め凹部に挿入されて接着されると、入射面凹部12が発光素子6の直上に位置するようになっている。   When the support leg 15 (15a) is bonded to the sheet member 10 and the support leg 15 (15b, 15c) is inserted into the positioning recess and bonded to the light beam control member 7, the incident surface recess 12 is directly above the light emitting element 6. It is supposed to be located in.

(本実施形態による効果)
本実施形態に係る発光装置3は、シート部材10が支持脚15(15b、15c)の平坦面24と基板5の表面とで挟み込まれる。そして、シート部材10の四隅は、コーナー押さえ部22により基板5の表面から離れないように押さえられる。よって、シート部材10が基板5の表面から離れるのを防止することができる。また、本実施形態においても先の実施形態1と同等の効果を奏する。
(Effects of this embodiment)
In the light emitting device 3 according to this embodiment, the sheet member 10 is sandwiched between the flat surface 24 of the support legs 15 (15b, 15c) and the surface of the substrate 5. The four corners of the sheet member 10 are pressed by the corner pressing portion 22 so as not to leave the surface of the substrate 5. Therefore, the sheet member 10 can be prevented from separating from the surface of the substrate 5. Also in this embodiment, the same effects as those of the first embodiment are obtained.

<実施形態4>
図12を用いて、実施形態4に係る発光装置3について説明する。なお、本実施形態は、光束制御部材7の裏面8に形成される支持脚15の本数を除き、その基本的構成が実施形態1と同様であるため、実施形態1の発光装置3と同様の構成には同一の符号を付し、上記実施形態の説明と重複することになる説明を省略する。図12(a)は、実施形態4に係る発光装置3の平面図を示すものである。図12(b)は、実施形態4に係る発光装置3を図12(a)のX6ーX6線に沿って切断して示す断面図である。
<Embodiment 4>
The light-emitting device 3 according to Embodiment 4 will be described with reference to FIG. Note that this embodiment has the same basic configuration as that of the first embodiment except for the number of support legs 15 formed on the back surface 8 of the light flux controlling member 7, and thus is the same as that of the light emitting device 3 of the first embodiment. The same reference numerals are given to the components, and the description that overlaps the description of the above embodiment is omitted. FIG. 12A shows a plan view of the light emitting device 3 according to the fourth embodiment. FIG. 12B is a cross-sectional view showing the light emitting device 3 according to Embodiment 4 cut along line X6-X6 in FIG.

図12(a)に示す通り、実施形態4に係る光束制御部材7の裏面8には、四本の支持脚15が形成されている。   As shown in FIG. 12A, four support legs 15 are formed on the back surface 8 of the light flux controlling member 7 according to the fourth embodiment.

四本の支持脚15(15a、15b、15c、15d)は、平面視した際に光軸Lを中心として、支持脚15(15a)が時計の十一時の方向に位置しているとすると、支持脚15(15b)が一時の方向に位置し、支持脚15(15c)が五時の方向に位置し、支持脚15(15d)が七時の方向に位置するように形成されている。言い換えると、光束制御部材7の光軸Lを中心とする仮想円上で、支持脚15(15b)は支持脚15(15a)から時計回りに60度移動させた位置に形成されている。支持脚15(15c)は、支持脚15(15b)から時計回りに120度移動させた位置に形成されている。支持脚15(15d)は、支持脚15(15c)から時計回りに60度移動させた位置に形成されている。   The four support legs 15 (15a, 15b, 15c, 15d) are assumed to be positioned in the ten-thousand-hour direction of the watch with the optical axis L as the center when viewed in plan. The support leg 15 (15b) is positioned in the temporary direction, the support leg 15 (15c) is positioned in the 5 o'clock direction, and the support leg 15 (15d) is positioned in the 7 o'clock direction. . In other words, on the virtual circle centering on the optical axis L of the light flux controlling member 7, the support leg 15 (15b) is formed at a position moved 60 degrees clockwise from the support leg 15 (15a). The support leg 15 (15c) is formed at a position moved 120 degrees clockwise from the support leg 15 (15b). The support leg 15 (15d) is formed at a position moved 60 degrees clockwise from the support leg 15 (15c).

支持脚15(15a、15b、15c、15d)は、支持脚15(15a)と支持脚15(15b)との中間点と、支持脚15(15c)と支持脚15(15d)との中間点とを結ぶ仮想線に対して線対称の位置に形成されている。また、支持脚15(15a、15b、15c、15d)は、光束制御部材7の光軸Lを中心として点対称の位置に形成されている。   The support leg 15 (15a, 15b, 15c, 15d) is an intermediate point between the support leg 15 (15a) and the support leg 15 (15b), and an intermediate point between the support leg 15 (15c) and the support leg 15 (15d). Are formed symmetrically with respect to a virtual line connecting the two. The support legs 15 (15a, 15b, 15c, 15d) are formed at point-symmetric positions with the optical axis L of the light flux controlling member 7 as the center.

この四本の支持脚15(15a、15b、15c、15d)は、二本の支持脚15(15c、15d)が基板5に対して接着され、二本の支持脚15(15a、15b)がシート部材10に対して接着される。   The four support legs 15 (15a, 15b, 15c, 15d) are bonded to the substrate 5 by the two support legs 15 (15c, 15d), and the two support legs 15 (15a, 15b) are bonded. Bonded to the sheet member 10.

(本実施形態による効果)
本実施形態に係る光束制御部材7の支持脚15は、熱膨張に伴う支持脚15の一本あたりに発生する応力を分担し減らすことができる。これにより先の実施形態1と比較して、さらに基板5に接着された支持脚15が、基板5の表面から外れ難くすることができる。
(Effects of this embodiment)
The support leg 15 of the light flux controlling member 7 according to the present embodiment can share and reduce the stress generated per one support leg 15 due to thermal expansion. As a result, the support legs 15 bonded to the substrate 5 can be further prevented from coming off from the surface of the substrate 5 as compared with the first embodiment.

<実施形態5>
図13を用いて、実施形態5に係る発光装置3について説明する。なお、本実施形態は、光束制御部材7の裏面8に形成される支持脚15の間隔、シート部材10に形成される穴部26及び切り込み部27を除き、その基本的構成が実施形態1と同様であるため、上記実施形態1と同様の構成には同一の符号を付し、実施形態1の説明と重複することになる説明を省略する。図13(a)は、実施形態5に係る発光装置3の平面図を示すものである。図13(b)は、実施形態5に係る発光装置3を図13(a)のX7ーX7線に沿って切断して示す断面図である。
<Embodiment 5>
The light emitting device 3 according to Embodiment 5 will be described with reference to FIG. The basic configuration of the present embodiment is the same as that of the first embodiment except for the interval between the support legs 15 formed on the back surface 8 of the light flux controlling member 7 and the hole portion 26 and the cut portion 27 formed in the sheet member 10. Since it is the same, the same code | symbol is attached | subjected to the structure similar to the said Embodiment 1, and the description which overlaps with description of Embodiment 1 is abbreviate | omitted. FIG. 13A is a plan view of the light emitting device 3 according to the fifth embodiment. FIG. 13B is a cross-sectional view showing the light-emitting device 3 according to Embodiment 5 cut along line X7-X7 in FIG.

図13(a)に示す通り、光束制御部材7の裏面8で、且つ、入射面凹部12よりも径方向外方側には、丸棒状の支持脚15が複数形成されている。この支持脚15は、光束制御部材7の光軸Lと同心の仮想円周上に等間隔に三本突出形成されている。   As shown in FIG. 13A, a plurality of round bar-like support legs 15 are formed on the rear surface 8 of the light flux controlling member 7 and on the radially outer side of the incident surface recess 12. Three support legs 15 are formed to protrude at equal intervals on a virtual circumference concentric with the optical axis L of the light flux controlling member 7.

この三本の支持脚15(15a、15b、15c)は、支持脚15(15c)が基板5に対して接着され、支持脚15(15a、15b)がシート部材10に対して接着されるようになっている。   The three support legs 15 (15a, 15b, 15c) are bonded so that the support legs 15 (15c) are bonded to the substrate 5 and the support legs 15 (15a, 15b) are bonded to the sheet member 10. It has become.

シート部材10は、発光素子6を露出させるための円形状の開口部16と、基板5に取り付けられる支持脚15と係合する係合穴17と、係合穴17よりも小径な穴部26と、この穴部26と開口部16とを繋ぐ切り込み部27と、が形成されている。このシート部材10は、先の実施形態1と同様に、基板5の線膨張係数と比較して光束制御部材7の線膨張係数に近い線膨張係数の材料で形成されている。   The sheet member 10 includes a circular opening 16 for exposing the light emitting element 6, an engagement hole 17 that engages with a support leg 15 attached to the substrate 5, and a hole 26 that has a smaller diameter than the engagement hole 17. And the notch 27 which connects this hole part 26 and the opening part 16 is formed. As in the first embodiment, the sheet member 10 is formed of a material having a linear expansion coefficient that is closer to the linear expansion coefficient of the light beam control member 7 than the linear expansion coefficient of the substrate 5.

穴部26は、係合穴17の中心から開口部16の中心を通る仮想線上に、形成されている。そして、この穴部26の中心と開口部16の中心との距離は、光束制御部材7の円形状である裏面8の半径よりも大きくなっている。これにより、穴部26は、発光装置3を平面視した際に、光束制御部材7の外方へ位置している。   The hole 26 is formed on an imaginary line that passes from the center of the engagement hole 17 to the center of the opening 16. The distance between the center of the hole 26 and the center of the opening 16 is larger than the radius of the back surface 8 which is the circular shape of the light flux controlling member 7. Thereby, the hole 26 is located outside the light flux controlling member 7 when the light emitting device 3 is viewed in plan.

光束制御部材7は、シート部材10が載置された基板5の表面に、光束制御部材7の入射面凹部12が発光素子6の直上に位置し、且つ、支持脚15(15a)と支持脚15(15b)との間に切り込み部27が位置するように配置され、二本の支持脚15(15a、15b)がシート部材10に接着され、支持脚15(15c)がシート部材10の係合穴17を通して基板5に接着されて固定される。   The light flux controlling member 7 has a surface of the substrate 5 on which the sheet member 10 is placed, the entrance surface concave portion 12 of the light flux controlling member 7 is located immediately above the light emitting element 6, and the support leg 15 (15a) and the support leg. 15 (15b), the cut portion 27 is disposed between the two support legs 15 (15a, 15b), and the support legs 15 (15c) are connected to the sheet member 10. It is bonded and fixed to the substrate 5 through the joint hole 17.

切り込み部27は、熱膨張による支持脚15(a)と支持脚15(b)との支持脚間距離の増加を、切り込み部27が開口することにより緩和できるようになっている。   The cut portion 27 can reduce the increase in the distance between the support legs 15 (a) and 15 (b) due to thermal expansion when the cut portion 27 is opened.

なお、切り込み部27を支持脚15(15a)と支持脚15(15b)との間に形成する態様で説明したが、これに限定されるものではない。例えば、支持脚15(15a)と支持脚15(15c)との間に、又は支持脚15(15b)と支持脚15(15c)との間に、切り込み部27を形成しても良い。   In addition, although the cut part 27 was demonstrated in the aspect formed between the support leg 15 (15a) and the support leg 15 (15b), it is not limited to this. For example, the cut portion 27 may be formed between the support leg 15 (15a) and the support leg 15 (15c) or between the support leg 15 (15b) and the support leg 15 (15c).

(本実施形態による効果)
本実施形態は、光束制御部材7と比較して線膨張係数が大きく異なる基板5に対して、支持脚15をひとつしか接着しない構成となっている。これにより、支持脚15には、線膨張係数の大きく異なる基板5に複数支持脚15を接着することに伴う支持脚間距離の増加によって、応力がかかることがない。
(Effects of this embodiment)
In the present embodiment, only one support leg 15 is bonded to the substrate 5 having a significantly different linear expansion coefficient compared to the light flux controlling member 7. Thus, no stress is applied to the support legs 15 due to an increase in the distance between the support legs accompanying the bonding of the plurality of support legs 15 to the substrates 5 having greatly different linear expansion coefficients.

また、支持脚15(15a、15b)は、基板5の線膨張係数と比較して光束制御部材7の線膨張係数に近いシート部材10に接着される。さらに、支持脚15(15a)と支持脚15(15b)との間に切り込み部27が形成されている。これにより、シート部材10に接着される支持脚15(15a、15b)の支持脚間距離の増加は、基板5の線膨張係数と比較して光束制御部材7の線膨張係数に近いシート部材10が熱膨張し切り込み部が開くことにより、吸収されるようになっている。そして、シート部材10に接着される支持脚(15a、15b)と基板5に接着される支持脚(15c)との支持脚間距離の増加は、基板5の線膨張係数と比較して光束制御部材7の線膨張係数に近いシート部材10が熱膨張することにより、吸収されるようになっている。   Further, the support legs 15 (15 a, 15 b) are bonded to the sheet member 10 that is closer to the linear expansion coefficient of the light flux controlling member 7 than the linear expansion coefficient of the substrate 5. Further, a cut portion 27 is formed between the support leg 15 (15a) and the support leg 15 (15b). Thus, the increase in the distance between the support legs of the support legs 15 (15a, 15b) bonded to the sheet member 10 is closer to the linear expansion coefficient of the light beam control member 7 than the linear expansion coefficient of the substrate 5. Is absorbed by the thermal expansion and the notch opening. The increase in the distance between the support legs between the support legs (15a, 15b) bonded to the sheet member 10 and the support legs (15c) bonded to the substrate 5 is a light flux control compared to the linear expansion coefficient of the substrate 5. The sheet member 10 close to the linear expansion coefficient of the member 7 is absorbed by thermal expansion.

以上により、本実施形態においても、先の実施形態1と同等の効果を奏する。   As described above, also in the present embodiment, the same effects as those of the first embodiment can be obtained.

<実施形態6>
図14を用いて、実施形態6に係る発光装置3について説明する。なお、本実施形態は、シート部材10に形成される穴部26と切り込み部27、そして、光束制御部材7の支持脚15の全てがシート部材10に接着されることを除き、その基本的構成が実施形態1と同様であるため、上記実施形態1と同様の構成には同一の符号を付し、実施形態1の説明と重複することになる説明を省略する。図14(a)は、実施形態6に係る発光装置3の平面図を示すものである。図14(b)は、実施形態6に係る発光装置3を図14(a)のX8ーX8線に沿って切断して示す断面図である。
<Embodiment 6>
The light emitting device 3 according to Embodiment 6 will be described with reference to FIG. The basic configuration of the present embodiment is that the hole 26 and the notch 27 formed in the sheet member 10 and the support leg 15 of the light flux controlling member 7 are all bonded to the sheet member 10. However, since it is the same as that of Embodiment 1, the same code | symbol is attached | subjected to the structure similar to the said Embodiment 1, and the description which overlaps with description of Embodiment 1 is abbreviate | omitted. FIG. 14A is a plan view of the light emitting device 3 according to the sixth embodiment. FIG. 14B is a cross-sectional view showing the light emitting device 3 according to Embodiment 6 cut along line X8-X8 in FIG.

図14(a)、図14(b)に示す通り、光束制御部材7は、光束制御部材7の裏面8で、且つ、入射面凹部12よりも径方向外方側に、丸棒状の支持脚15が複数形成されている。この支持脚15は、光束制御部材7の光軸Lと同心の仮想円周上に等間隔に三本突出形成されている。この三本の支持脚15(15a、15b、15c)の長さは、等しくなっている。そして、この三本の支持脚15(15a、15b、15c)の全ては、シート部材10に対して、接着されるようになっている。   As shown in FIGS. 14A and 14B, the light beam control member 7 is a round bar-shaped support leg on the back surface 8 of the light beam control member 7 and on the radially outer side of the entrance surface recess 12. A plurality of 15 are formed. Three support legs 15 are formed to protrude at equal intervals on a virtual circumference concentric with the optical axis L of the light flux controlling member 7. The lengths of the three support legs 15 (15a, 15b, 15c) are equal. All of the three support legs 15 (15a, 15b, 15c) are bonded to the sheet member 10.

シート部材10は、基板5の表面に取り付けられた発光素子6を露出させるための円形状の開口部16と、係合穴17よりも小径な複数の穴部26と、開口部16と各穴部26とを繋ぐ切り込み部27と、が形成されている。このシート部材10は、先の実施形態1と同様に、基板5の線膨張係数と比較して光束制御部材7の線膨張係数に近い線膨張係数の材料で形成されている。   The sheet member 10 includes a circular opening 16 for exposing the light emitting element 6 attached to the surface of the substrate 5, a plurality of holes 26 smaller in diameter than the engagement holes 17, the openings 16, and the holes. A cut portion 27 that connects the portion 26 is formed. As in the first embodiment, the sheet member 10 is formed of a material having a linear expansion coefficient that is closer to the linear expansion coefficient of the light beam control member 7 than the linear expansion coefficient of the substrate 5.

穴部26は、円形状の開口部16の中心と同心の仮想円周上に等間隔に三個形成されている。そして、この穴部26の中心と開口部16の中心との距離は、光束制御部材7の円形状である裏面8の半径よりも大きくなっている。これにより、穴部26は、発光装置3を平面視した際に、光束制御部材7の外方へ位置している。   Three holes 26 are formed at equal intervals on a virtual circumference concentric with the center of the circular opening 16. The distance between the center of the hole 26 and the center of the opening 16 is larger than the radius of the back surface 8 which is the circular shape of the light flux controlling member 7. Thereby, the hole 26 is located outside the light flux controlling member 7 when the light emitting device 3 is viewed in plan.

切り込み部27は、開口部16と穴部26とを繋ぐように形成されている。   The cut portion 27 is formed so as to connect the opening portion 16 and the hole portion 26.

そして、このシート部材10は、円形形状の開口部16から発光素子6が露出するように基板5に対して配置され、基板5に部分的に固定されるようになっている。例えば、シート部材10の四隅が基板5の表面にピン止め(不図示)されて部分的に固定される。   The sheet member 10 is arranged with respect to the substrate 5 so that the light emitting element 6 is exposed from the circular opening 16, and is partially fixed to the substrate 5. For example, the four corners of the sheet member 10 are pinned (not shown) to the surface of the substrate 5 and partially fixed.

光束制御部材7は、基板5に位置決めされ部分的に固定されたシート部材10に、入射面凹部12が発光素子6の直上に位置し、且つ、支持脚15と支持脚15との間に切り込み部27が位置するように、支持脚15の全てがシート部材10に対して接着される。   The light flux controlling member 7 is formed in a sheet member 10 that is positioned and partially fixed on the substrate 5, the entrance surface concave portion 12 is located immediately above the light emitting element 6, and is cut between the support leg 15 and the support leg 15. All of the support legs 15 are bonded to the sheet member 10 so that the portion 27 is positioned.

なお、シート部材10を基板5の表面に対して、ピン止めする構成を例に挙げて説明したが、この構成に限定されるものではない。光束制御部材7とシート部材10との間に熱膨張差が生じた場合に、シート部材10が、光束制御部材7とシート部材10との熱膨張差を吸収できるように基板5に対して変位可能に、基板5に部分的固定されていれば良い。   In addition, although the structure which pins the sheet | seat member 10 with respect to the surface of the board | substrate 5 was mentioned as an example and demonstrated, it is not limited to this structure. When a difference in thermal expansion occurs between the light beam control member 7 and the sheet member 10, the sheet member 10 is displaced with respect to the substrate 5 so as to absorb the difference in thermal expansion between the light beam control member 7 and the sheet member 10. It is only necessary to be partially fixed to the substrate 5.

また、隣接する支持脚15の間の全てに切り込み部を形成する構成で説明したが、これに限定されるものではない。使用されるシート部材10の特性(例えば、流れ方向と垂直方向とで線膨張係数の値が大きく異なる)に応じて、適宜、切り込み部の数は調整される。なお、シート部材10のみで支持脚間距離の増加を吸収できる場合は、切り込み部27を省略することができる。   Further, although the description has been given of the configuration in which the cut portions are formed between the adjacent support legs 15, the present invention is not limited to this. The number of notches is adjusted as appropriate according to the characteristics of the sheet member 10 used (for example, the value of the linear expansion coefficient differs greatly between the flow direction and the vertical direction). In addition, the cut | notch part 27 can be abbreviate | omitted when the increase in the distance between support legs can be absorbed only with the sheet | seat member 10. FIG.

(本実施形態による効果)
本実施形態に係る光束制御部材7は、支持脚15(15a、15b、15c)が基板5の線膨張係数と比較して光束制御部材7の線膨張係数に近いシート部材10に接着されていることにより、支持脚間距離の増加を緩和することができる。さらに、隣接する支持脚15の間には、切り込み部27が形成されていることにより、光束制御部材7の線膨張係数とシート部材10の線膨張係数との違いから発生する支持脚間距離の増加も、切り込み部27が開口することにより吸収することができる。
(Effects of this embodiment)
In the light flux controlling member 7 according to the present embodiment, the support legs 15 (15a, 15b, 15c) are bonded to the sheet member 10 that is closer to the linear expansion coefficient of the light flux controlling member 7 than the linear expansion coefficient of the substrate 5. Thereby, the increase in the distance between support legs can be relieved. Furthermore, a notch 27 is formed between the adjacent support legs 15, so that the distance between the support legs generated from the difference between the linear expansion coefficient of the light beam control member 7 and the linear expansion coefficient of the sheet member 10 is reduced. The increase can also be absorbed by the opening of the cut portion 27.

以上により、本実施形態においても、先の実施形態1と同等の効果を奏する。   As described above, also in the present embodiment, the same effects as those of the first embodiment can be obtained.

<参考例1>
図15を用いて、参考例1に係る発光装置3について説明する。なお、参考例1に係る発光装置3は、その基本的構成が上記実施形態1と同様であるため、上記実施形態1に対応する構成には同一の符号を付し、上記実施形態1の説明と重複することになる説明を省略する。図15(a)は、参考例1に係る発光装置3の平面図を示すものである。図15(b)は、参考例1に係る発光装置3を図15(a)のX9ーX9線に沿って切断して示す断面図である。
<Reference Example 1>
The light emitting device 3 according to Reference Example 1 will be described with reference to FIG. Since the basic configuration of the light emitting device 3 according to Reference Example 1 is the same as that of the first embodiment, the same reference numerals are given to the configurations corresponding to the first embodiment, and the description of the first embodiment is made. The description which overlaps with is omitted. FIG. 15A shows a plan view of the light emitting device 3 according to Reference Example 1. FIG. FIG. 15B is a cross-sectional view showing the light emitting device 3 according to Reference Example 1 cut along line X9-X9 in FIG.

図15(a)、(b)に示す通り、光束制御部材7は、平面視した際の光制御出射面13の外縁及び鍔部14の外縁に沿って、周方向に等間隔に三個の長穴形状の空洞部30が形成されている。これにより、鍔部14の一部には、取っ手形状の弾性変形部31が形成される。この弾性変形部31は、光束制御部材7の径方向内方側に長穴形状の空洞部30を有していることにより、径方向外方から径方向内方へ力を加えられると、径方向内方側へ向かって撓むように弾性変形することができる。そして、図15(a)で示す通り、発光装置3を平面視すると、各々の弾性変形部31における径方向のほぼ中央には、光束制御部材7の裏面8に対して垂直に延びる支持脚15が形成されている。この支持脚15の形成位置は、光束制御部材7の光軸Lを中心とする同心円上に対して、等間隔に形成された位置となっている。   As shown in FIGS. 15 (a) and 15 (b), the light flux controlling member 7 includes three pieces at equal intervals in the circumferential direction along the outer edge of the light control emitting surface 13 and the outer edge of the flange 14 when viewed in plan. A long hole-shaped cavity 30 is formed. Thereby, a handle-shaped elastic deformation part 31 is formed in a part of the collar part 14. The elastically deforming portion 31 has a long hole-shaped cavity 30 on the radially inner side of the light flux controlling member 7, so that when a force is applied from the radially outer side to the radially inner side, It can be elastically deformed so as to bend inward in the direction. As shown in FIG. 15A, when the light emitting device 3 is viewed in plan, the support leg 15 that extends perpendicularly to the back surface 8 of the light flux controlling member 7 is approximately at the center in the radial direction of each elastic deformation portion 31. Is formed. The formation positions of the support legs 15 are positions formed at equal intervals on a concentric circle with the optical axis L of the light beam control member 7 as the center.

シート部材10には、光束制御部材7の四本の支持脚15に対応するように、係合穴17が形成されている。   In the sheet member 10, engagement holes 17 are formed so as to correspond to the four support legs 15 of the light flux control member 7.

光束制御部材7の支持脚15の全ては、基板5の表面に対して接着されるようになっている。本参考例において、支持脚15の全てが、基板5の表面に接着されるようになっているため、シート部材10を省略しても良い。   All of the support legs 15 of the light flux controlling member 7 are bonded to the surface of the substrate 5. In the present reference example, since all the support legs 15 are bonded to the surface of the substrate 5, the sheet member 10 may be omitted.

(本参考例による効果)
本参考例は、光束制御部材7の弾性変形部31が、光束制御部材7の径方向内方へ向かって弾性変形することができるようになっている。これにより、光束制御部材7の弾性変形部31は、基板5と光束制御部材7との線膨張係数の違いにより光束制御部材7の支持脚15にひずみが発生したとしても、弾性変形部31が弾性変形して撓むことによりひずみを緩和することができる。以上により、本参考例においても、先の実施形態1と同等の効果を奏する。
(Effects of this reference example)
In this reference example, the elastic deformation portion 31 of the light beam control member 7 can be elastically deformed radially inward of the light beam control member 7. Thereby, even if the elastic deformation part 31 of the light beam control member 7 is distorted in the support leg 15 of the light beam control member 7 due to the difference in linear expansion coefficient between the substrate 5 and the light beam control member 7, the elastic deformation part 31 Strain can be relieved by elastically deforming and bending. As described above, also in this reference example, the same effects as those of the first embodiment are obtained.

<参考例2>
図16を用いて、参考例2に係る発光装置3について説明する。なお、参考例2に係る発光装置3は、光束制御部材7に形成される弾性変形部31を除き、その基本的構成が上記参考例1と同様であるため、上記参考例1と同様の構成には同一の符号を付し、上記実施形態の説明と重複することになる説明を省略する。図16(a)は、参考例2に係る発光装置3の平面図を示すものである。図16(b)は、参考例2に係る発光装置3を図16(a)のX10ーX10線に沿って切断して示す断面図である。
<Reference Example 2>
The light-emitting device 3 according to Reference Example 2 will be described with reference to FIG. The light emitting device 3 according to Reference Example 2 has the same basic configuration as that of Reference Example 1 except for the elastic deformation portion 31 formed on the light flux controlling member 7, and thus has the same configuration as that of Reference Example 1. Are denoted by the same reference numerals, and the description that overlaps the description of the above embodiment is omitted. FIG. 16A shows a plan view of the light emitting device 3 according to Reference Example 2. FIG. FIG. 16B is a cross-sectional view showing the light emitting device 3 according to Reference Example 2 cut along the line X10-X10 in FIG.

図16(a)、図16(b)に示す通り、光束制御部材7は、鍔部14が図示するように切り欠きされたような形状となっている。そして、光束制御部材7には、その周方向に沿って延びるアーム状の弾性変形部31が等間隔に三個形成されている。この弾性変形部31は、光束制御部材7の鍔部14における径方向内方側が切り欠きされていることにより、径方向外方から径方向内方へ力を加えると、径方向内方側へ向かって撓むように弾性変形することができる。そして、各々の弾性変形部31の自由端である先端には、光束制御部材7の裏面8に対して垂直に延びる支持脚15が形成されている。この支持脚15の形成位置は、光束制御部材7の光軸Lを中心とする同心円上に対して、等間隔に形成された位置となっている。この支持脚15は、基板5に接着されるようになっている。   As shown in FIGS. 16 (a) and 16 (b), the light flux controlling member 7 has a shape in which the collar portion 14 is notched as shown. The light flux controlling member 7 is formed with three arm-shaped elastically deforming portions 31 extending along the circumferential direction at equal intervals. The elastically deforming portion 31 is notched on the radially inner side of the flange portion 14 of the light flux controlling member 7, so that when a force is applied from the radially outer side to the radially inner side, the elastically deforming portion 31 moves radially inward. It can be elastically deformed so as to bend toward the surface. A support leg 15 extending perpendicularly to the back surface 8 of the light flux controlling member 7 is formed at the tip which is the free end of each elastic deformation portion 31. The formation positions of the support legs 15 are positions formed at equal intervals with respect to a concentric circle centered on the optical axis L of the light beam control member 7. The support legs 15 are bonded to the substrate 5.

(本参考例による効果)
本参考例は、参考例1と同様に光束制御部材7に弾性変形部31が形成されている。これにより、先の参考例1と同等の効果を奏する。
(Effects of this reference example)
In the present reference example, the elastic deformation portion 31 is formed in the light flux controlling member 7 as in the first reference example. Thereby, there exists an effect equivalent to the previous reference example 1. FIG.

また、本参考例に係るアーム状の弾性変形部31は、一端側が自由端となっていることから、先の参考例1と比較して、弾性変形部31が撓み易くなっている。よって、本参考例に係る弾性変形部31は、各支持脚15に発生する応力を先の参考例1と比較してより緩和することができる。   Moreover, since the arm-shaped elastic deformation part 31 which concerns on this reference example has the free end at the one end side, compared with the previous reference example 1, the elastic deformation part 31 is easy to bend. Therefore, the elastic deformation portion 31 according to the present reference example can further relax the stress generated in each support leg 15 as compared with the previous reference example 1.

<参考例3>
図17を用いて、参考例3に係る発光装置3について説明する。なお、参考例3に係る発光装置3は、光束制御部材7の裏面に形成される支持脚15の形状及び形成位置と光束制御部材7の支持脚15の全てが基板5に接着されることを除き、その基本的構成が上記参考例1と同様であるため、上記参考例1と同様の構成には同一の符号を付し、上記参考例1の説明と重複することになる説明を省略する。図17(a)は、参考例3に係る発光装置3の平面図を示すものである。図17(b)は、参考例3に係る発光装置3を図17(a)のX11ーX11線に沿って切断して示す断面図である。
<Reference Example 3>
The light emitting device 3 according to Reference Example 3 will be described with reference to FIG. In the light emitting device 3 according to the reference example 3, the shape and position of the support leg 15 formed on the back surface of the light beam control member 7 and the support leg 15 of the light beam control member 7 are all bonded to the substrate 5. Except for this, the basic configuration is the same as that of the reference example 1, and thus the same reference numerals are given to the same configuration as the reference example 1, and the description that overlaps the description of the reference example 1 is omitted. . FIG. 17A shows a plan view of the light emitting device 3 according to Reference Example 3. FIG. FIG. 17B is a cross-sectional view showing the light emitting device 3 according to Reference Example 3 cut along line X11-X11 in FIG.

図17(a)、図17(b)に示す通り、光束制御部材7は、その裏面8における径方向の内方側に四本の角棒状の支持脚15が形成されている。この四本の支持脚15は、光束制御部材7の光軸Lを中心とする同心円上に、等間隔に四本形成されている。ここで、光束制御部材7は、平面視した際に、光軸Lを中心として径方向外方へ膨張する。このとき、径方向外方側より径方向内方側の方が変位量が小さくなっている(図5(b)参照)。これにより、光束制御部材7の裏面8に形成される支持脚15は、先の参考例1と比較して、各支持脚15の支持脚間距離の増大量が少なくなる位置に形成されている。   As shown in FIGS. 17A and 17B, the light flux controlling member 7 has four square bar-shaped support legs 15 formed on the inner surface in the radial direction on the back surface 8 thereof. The four support legs 15 are formed at equal intervals on a concentric circle centered on the optical axis L of the light flux controlling member 7. Here, the light flux controlling member 7 expands radially outward about the optical axis L when viewed in plan. At this time, the amount of displacement is smaller on the radially inner side than on the radially outer side (see FIG. 5B). Thereby, the support leg 15 formed on the back surface 8 of the light flux controlling member 7 is formed at a position where the increase amount of the distance between the support legs of each support leg 15 is smaller than that of the first reference example. .

そして、この支持脚15は、基板5に接着した際、各支持脚15の一側面が表面実装型LED(発光素子)のパッケージに面接触するようにして基板5に接着される。そして、そのように接着されると、発光素子6の直上に光束制御部材7の入射面凹部12が位置するようになっている。   And when this support leg 15 adhere | attaches on the board | substrate 5, it adhere | attaches on the board | substrate 5 so that one side surface of each support leg 15 may surface-contact with the package of surface mount type LED (light emitting element). And if it adhere | attaches in that way, the entrance plane recessed part 12 of the light beam control member 7 will be located just above the light emitting element 6. FIG.

シート部材10には、光束制御部材7の四本の支持脚15に対応するように、係合穴17が形成されている。   In the sheet member 10, engagement holes 17 are formed so as to correspond to the four support legs 15 of the light flux control member 7.

(本参考例による効果)
本参考例は、支持脚15が光束制御部材7の裏面8における径方向内方側へ形成される。これにより、光束制御部材7の裏面8に形成される支持脚15の支持脚間距離は、先の参考例1と比較して、変位量を小さくすることができる。
(Effects of this reference example)
In this reference example, the support leg 15 is formed on the radially inner side of the back surface 8 of the light flux controlling member 7. As a result, the distance between the support legs of the support legs 15 formed on the back surface 8 of the light flux controlling member 7 can be smaller than that of the first reference example.

また、本参考例に係る光束制御部材7は、各支持脚15の一側面が、表面実装型LEDのパッケージに面接触するように、基板5の表面に接着される。これにより、発光素子6が光束制御部材7の入射面凹部12から外れて配置されることを防止することができる。   Further, the light flux controlling member 7 according to the present reference example is bonded to the surface of the substrate 5 so that one side surface of each support leg 15 is in surface contact with the surface-mount LED package. Thereby, it can prevent that the light emitting element 6 remove | deviates from the entrance surface recessed part 12 of the light beam control member 7, and is arrange | positioned.

<実施形態1乃至6に係る変形例>
なお、発光素子6について、表面実装型LEDを例示して説明したが、点状に発光するものであれば良く、これに限定されるものではない。例えば、砲弾型LEDでも良い。
<Modifications According to Embodiments 1 to 6>
In addition, although the surface-mounted LED was illustrated and demonstrated about the light emitting element 6, what is necessary is just to be luminescent in a dot shape, and it is not limited to this. For example, a bullet-type LED may be used.

また、光束制御部材7の材料について、PMMA(ポリメタクリルリル酸メチル)、PC(ポリカーボネート)、EP(エポキシ樹脂)を例示して説明したが、材料はこれに限定されるものではない。   Moreover, although the material of the light flux controlling member 7 has been described by exemplifying PMMA (polymethyl methacrylate), PC (polycarbonate), and EP (epoxy resin), the material is not limited to this.

また、シート部材10の線膨張係数が、光束制御部材7の線膨張係数よりも小さい値を例示して説明したが、これに限定されるものではない。例えば、シート部材10の線膨張係数が、光束制御部材7の線膨張係数よりも大きい値の場合は、光束制御部材7の支持脚間距離の増加をすべて吸収することができ、支持脚15に発生する応力をなくすことができる。なお、シート部材10は、光束制御部材7の支持脚間距離よりも膨張した場合、撓むことでその差分は吸収される。   Moreover, although the linear expansion coefficient of the sheet | seat member 10 demonstrated and demonstrated the value smaller than the linear expansion coefficient of the light beam control member 7, it is not limited to this. For example, when the linear expansion coefficient of the sheet member 10 is larger than the linear expansion coefficient of the light beam control member 7, all the increase in the distance between the support legs of the light beam control member 7 can be absorbed. The generated stress can be eliminated. When the sheet member 10 expands more than the distance between the support legs of the light beam control member 7, the difference is absorbed by bending.

また、実施形態2において、光束制御部材7の支持脚15とシート部材10の係合穴17とが隙間を持って遊嵌することにより、シート部材10は、シート部材10に接着される支持脚15の変位に伴い基板5に対してスライド可能となっている。この構成は実施形態2に限定されるものではなく、実施形態3、実施形態4、実施形態5にも同様に適用することができる。   Further, in the second embodiment, the support leg 15 of the light flux controlling member 7 and the engagement hole 17 of the sheet member 10 are loosely fitted with a gap so that the sheet member 10 is bonded to the sheet member 10. With the displacement of 15, it can slide with respect to the substrate 5. This configuration is not limited to the second embodiment, and can be similarly applied to the third, fourth, and fifth embodiments.

また、実施形態3における支持脚15、及びコーナー支持部22は、実施形態3に限定されることがなく、他のすべての実施形態及び参考例に適用することができる。   Moreover, the support leg 15 and the corner support part 22 in Embodiment 3 are not limited to Embodiment 3, and can be applied to all other embodiments and reference examples.

また、光束制御部材7の支持脚15と基板5との固定方法を、接着又は位置決め凹部21に挿入する態様を例示したが、固定方法は、これに限定されるものではない。例えば、支持脚15を先端に向かうに従がって径が細くなるように形成し、この支持脚15に対応するように基板5に貫通する穴を形成し、支持脚15をしまり嵌めする構成でも良い。   Moreover, although the aspect which inserts the fixing method of the support leg 15 of the light beam control member 7 and the board | substrate 5 in the adhesion | attachment or positioning recessed part 21 was illustrated, the fixing method is not limited to this. For example, the support leg 15 is formed so that the diameter thereof becomes narrower toward the tip, and a hole is formed through the substrate 5 so as to correspond to the support leg 15 so that the support leg 15 is tightly fitted. But it ’s okay.

また、シート部材10について、反射シートを例示したが、これに限定されるものではない。例えば、基板5と比較して光束制御部材7の線膨張係数に近い透明な樹脂製シートでも良い。   Moreover, although the reflective sheet was illustrated about the sheet | seat member 10, it is not limited to this. For example, a transparent resin sheet closer to the linear expansion coefficient of the light flux controlling member 7 than the substrate 5 may be used.

<参考例4>
以下、発光装置の参考例4を図面に基づき詳述する。
<Reference Example 4>
Hereinafter, Reference Example 4 of the light emitting device will be described in detail with reference to the drawings.

(発光装置の概略構成)
図18は、参考例4に係る発光装置41の概略構成を示すものである。なお、図18(a)は、発光装置41の平面図である。また、図18(b)は、図18(a)のA1−A1線に沿って切断して示す発光装置41の断面図である。
(Schematic configuration of light emitting device)
FIG. 18 shows a schematic configuration of a light emitting device 41 according to Reference Example 4. FIG. 18A is a plan view of the light emitting device 41. FIG. 18B is a cross-sectional view of the light emitting device 41 cut along the line A1-A1 in FIG.

発光装置41は、一様の厚さに形成された平板状の基板42と、この基板42上に重ねて配置されて光を反射するシート部材43と、基板42に実装され且つシート部材43の上方へ発光部44aが露出する発光素子(LED)44と、この発光素子44からの光を拡げて出射する光束制御部材45と、この光束制御部材45を基板42に取り付けるためのスリーブ(保持手段)46と、を備えている。   The light emitting device 41 includes a flat substrate 42 formed to have a uniform thickness, a sheet member 43 that is disposed on the substrate 42 and reflects light, and is mounted on the substrate 42 and is mounted on the substrate 42. A light emitting element (LED) 44 from which the light emitting portion 44a is exposed upward, a light flux controlling member 45 that spreads and emits light from the light emitting element 44, and a sleeve (holding means) for attaching the light flux controlling member 45 to the substrate 42 46).

(基板)
図19は、基板42を説明するための図である。なお、図19(a)が基板42の外縁を省略して示す発光素子44近傍の平面図であり、図19(b)が図19(a)のA2−A2線に沿って切断して示す基板42の断面図である。
(substrate)
FIG. 19 is a diagram for explaining the substrate 42. FIG. 19A is a plan view of the vicinity of the light emitting element 44 with the outer edge of the substrate 42 omitted, and FIG. 19B is cut along the line A2-A2 of FIG. 19A. 4 is a cross-sectional view of a substrate 42. FIG.

基板42は、プリント基板用の材料(例えば、線膨張係数がほぼ1.2×10-5[1/℃]のFR−4)で一様の板厚に形成されている。そして、この基板42の表面42aには、発光素子44が実装され、発光素子44の発光部44aが露出するようになっている。また、基板42の表面42aには、基板42に実装された発光素子44への通電を可能にする配線パターン(不図示)が形成されている。また、基板42の裏面42bには、発光素子44の作動を制御する制御回路(不図示)等が取り付けられている。なお、基板42の平面形状は、発光装置の使用状況に応じた形状に形成される。また、基板の板厚は、本参考例に限られず、部分的に板厚を変更(薄く又は厚く)してもよい。 The substrate 42 is formed of a material for a printed circuit board (for example, FR-4 having a linear expansion coefficient of approximately 1.2 × 10 −5 [1 / ° C.]) and has a uniform thickness. A light emitting element 44 is mounted on the surface 42a of the substrate 42 so that the light emitting portion 44a of the light emitting element 44 is exposed. Further, a wiring pattern (not shown) is formed on the surface 42 a of the substrate 42 to enable energization to the light emitting element 44 mounted on the substrate 42. Further, a control circuit (not shown) for controlling the operation of the light emitting element 44 is attached to the back surface 42b of the substrate 42. In addition, the planar shape of the substrate 42 is formed in a shape according to the usage state of the light emitting device. Further, the thickness of the substrate is not limited to this reference example, and the thickness may be partially changed (thinned or thickened).

このような基板42には、スリーブ46を装着するための貫通穴47が光束制御部材45の一対の固定用支持脚48,48に対応するように一対形成されている(図19参照)。この基板42の貫通穴47,47は、図18及び図19(b)に示すように、基板42の表面42a側から裏面42b側に貫通している。また、基板42の一対の貫通穴47は、図19(a)に示すように、基板42を平面視した際に、一方の貫通穴47の中心47aと他方の貫通穴47の中心47aを結ぶ線50が発光素子44の光軸L1と交差し、且つ、発光素子44の光軸L1から各貫通穴47,47の中心47a,47aまでの間隔が同一寸法となるように形成されている(発光素子44の光軸L1を中心として点対称となるように形成されている)。ここで、発光素子44の光軸L1とは、発光素子44からの立体的な出射光束の中心における光の進行方向をいう。   In such a substrate 42, a pair of through holes 47 for mounting the sleeve 46 are formed so as to correspond to the pair of fixing support legs 48, 48 of the light flux controlling member 45 (see FIG. 19). The through holes 47 and 47 of the substrate 42 penetrate from the front surface 42a side to the back surface 42b side of the substrate 42, as shown in FIGS. In addition, as shown in FIG. 19A, the pair of through holes 47 of the substrate 42 connects the center 47 a of one through hole 47 and the center 47 a of the other through hole 47 when the substrate 42 is viewed in plan. The line 50 intersects with the optical axis L1 of the light emitting element 44, and the distance from the optical axis L1 of the light emitting element 44 to the centers 47a, 47a of the through holes 47, 47 has the same dimension ( It is formed so as to be point symmetric about the optical axis L1 of the light emitting element 44). Here, the optical axis L1 of the light emitting element 44 refers to the traveling direction of light at the center of the three-dimensional emitted light beam from the light emitting element 44.

(シート部材)
図18に示すように、シート部材43は、PETシート(ポリエチレンテレフタレートシート)等の光反射特性に優れた樹脂製の反射シートや、樹脂製シートの表面に銀蒸着された反射シートであり、一様の厚さになるようにフィルム状又は薄板状に形成されている。
(Sheet material)
As shown in FIG. 18, the sheet member 43 is a resin-made reflective sheet such as a PET sheet (polyethylene terephthalate sheet) or the like, or a reflective sheet deposited with silver on the surface of the resin sheet. It is formed in a film shape or a thin plate shape so as to have a different thickness.

このシート部材43は、発光素子44の発光部44aを基板42の上部空間に露出させる開口部51と、基板42の一対の貫通穴47,47に装着された各スリーブ46に隙間をもって係合する一対の係合穴52,52と、が形成されている。そして、このシート部材43は、開口部51の中心51aが発光素子44の光軸L1に合致するように基板42上に載置されると、係合穴52,52の中心52a,52aが貫通穴47,47の中心47a,47aに合致するように形成されている。なお、本変形例において使用されるシート部材43は、線膨張係数が4.0×10-5[1/℃])の材料で形成されたものを使用した。 The sheet member 43 is engaged with an opening 51 that exposes the light emitting portion 44 a of the light emitting element 44 to the upper space of the substrate 42 and each sleeve 46 that is mounted in the pair of through holes 47 and 47 of the substrate 42 with a gap. A pair of engagement holes 52, 52 are formed. When the sheet member 43 is placed on the substrate 42 so that the center 51a of the opening 51 coincides with the optical axis L1 of the light emitting element 44, the centers 52a and 52a of the engagement holes 52 and 52 pass through. The holes 47 and 47 are formed so as to coincide with the centers 47a and 47a. In addition, the sheet member 43 used in the present modification was formed of a material having a linear expansion coefficient of 4.0 × 10 −5 [1 / ° C.].

(発光素子)
図18に示すように、発光素子44は、表面実装型のLEDが使用される。この発光素子44は、その端子電極(不図示)が基板42の配線パターン上に半田付けされることにより、図示しない外部の電源に電気的に接続され、制御回路によりON・OFF制御されるようになっている。
(Light emitting element)
As shown in FIG. 18, the light-emitting element 44 is a surface-mounted LED. The light emitting element 44 is electrically connected to an external power source (not shown) by soldering terminal electrodes (not shown) on the wiring pattern of the substrate 42, and is controlled to be turned on and off by a control circuit. It has become.

(光束制御部材)
図20は、光束制御部材45を示す図である。なお、図20(a)は、光束制御部材45の平面図である。図20(b)は、図20(a)のA3−A3線に沿って切断して示す光束制御部材45の断面図である。図20(c)は、光束制御部材45の裏面図である。
(Flux control member)
FIG. 20 is a diagram showing the light flux controlling member 45. 20A is a plan view of the light flux controlling member 45. FIG. FIG. 20B is a cross-sectional view of the light flux controlling member 45 shown cut along the line A3-A3 in FIG. FIG. 20C is a rear view of the light flux controlling member 45.

光束制御部材45は、例えば、PMMA(ポリメタクリル酸メチル)、PC(ポリカーボネート)、COP(シクロオレフィンポリマー)等の透明な合成樹脂材料を用いて射出成形されたものが使用される。なお、本参考例4における光束制御部材45は、線膨張係数が6.0×10-5[1/℃]のPMMAで形成されている。ここで、光束制御部材45から出射する光の立体的な出射光束の中心における光の進行方向を、光束制御部材45の光軸Lと定義する。 The light flux controlling member 45 is, for example, one that is injection-molded using a transparent synthetic resin material such as PMMA (polymethyl methacrylate), PC (polycarbonate), COP (cycloolefin polymer), or the like. The light flux controlling member 45 in the present reference example 4 is formed of PMMA having a linear expansion coefficient of 6.0 × 10 −5 [1 / ° C.]. Here, the traveling direction of light at the center of the three-dimensional emitted light beam of the light emitted from the light beam control member 45 is defined as the optical axis L of the light beam control member 45.

この光束制御部材45は、発光素子44からの光を取り込む入射面凹部53と、その取り込んだ光を拡げて出射させる光制御出射面54と、この光制御出射面54の径方向外方側に出っ張るように形成された略円環状の鍔部55と、裏面56に突出形成された一対の固定用支持脚48,48と、裏面56に突出形成された一対の高さ規制ボス57,57と、を有している。なお、入射面凹部53は、楕円球を短軸に沿って切断した半楕円球の外表面のような滑らかな曲面の凹みであり、裏面56側の開口縁が円形となるように形成されている。   The light flux controlling member 45 includes an incident surface concave portion 53 that captures light from the light emitting element 44, a light control emitting surface 54 that expands and emits the captured light, and a radially outward side of the light control emitting surface 54. A substantially annular flange 55 formed so as to project, a pair of fixing support legs 48, 48 projecting from the back surface 56, and a pair of height regulating bosses 57, 57 projecting from the back surface 56 ,have. The entrance surface recess 53 is a recess having a smooth curved surface like the outer surface of a semi-elliptical sphere obtained by cutting an elliptical sphere along the minor axis, and is formed so that the opening edge on the back surface 56 side is circular. Yes.

また、一対の固定用支持脚48,48は、図20(c)に示す光束制御部材45の裏面図において、一方の固定用支持脚48の中心48aと他方の固定用支持脚48の中心48aを結ぶ線58が光束制御部材45の中心45a(光軸L)と交差し、且つ、光束制御部材45の中心45aから各固定用支持脚48の中心48aまでの間隔が同一寸法となるように形成されている。また、この一対の固定用支持脚48,48は、根元部から先端部に向かうに従って外径寸法が漸減するようにテーパ形状に形成され、基板42の貫通穴47に装着されたスリーブ46に嵌合されると、スリーブ46の光束制御部材保持爪60によって弾性的に保持されるようになっている(図18(b)参照)。そして、この一対の固定用支持脚48,48が基板42の貫通穴47,47に装着されたスリーブ46,46に嵌合されて保持されると、光束制御部材45の光軸Lが発光素子44の光軸L1に合致するように、光束制御部材45が基板42に実装された発光素子44に対して位置決めされる(図18(a),(b)参照)。   In addition, the pair of fixing support legs 48, 48 are the center 48a of one fixing support leg 48 and the center 48a of the other fixing support leg 48 in the rear view of the light flux controlling member 45 shown in FIG. The line 58 that connects the two intersects the center 45a (optical axis L) of the light flux controlling member 45, and the distance from the center 45a of the light flux controlling member 45 to the center 48a of each fixing support leg 48 has the same dimension. Is formed. Further, the pair of fixing support legs 48 are formed in a tapered shape so that the outer diameter is gradually reduced from the base portion toward the tip portion, and are fitted into a sleeve 46 attached to the through hole 47 of the substrate 42. When they are combined, they are elastically held by the light flux controlling member holding claws 60 of the sleeve 46 (see FIG. 18B). When the pair of fixing support legs 48, 48 are fitted and held in sleeves 46, 46 mounted in the through holes 47, 47 of the substrate 42, the optical axis L of the light flux controlling member 45 is changed to the light emitting element. The light flux controlling member 45 is positioned with respect to the light emitting element 44 mounted on the substrate 42 so as to coincide with the optical axis L1 of 44 (see FIGS. 18A and 18B).

また、一対の高さ規制ボス57,57は、図20(c)に示す光束制御部材45の裏面図において、一方の高さ規制ボス57の中心57aと他方の高さ規制ボス57の中心57aとを結ぶ線61が、光束制御部材45の中心45a(光軸L)と交差し、且つ、一対の固定用支持脚48,48の中心48a.48a同士を結ぶ線58と直交するように形成されている。また、この一対の高さ規制ボス57,57は、図20(c)に示す光束制御部材45の裏面図において、光束制御部材45の光軸Lを中心として一対の固定用支持脚48,48の中心48a,48aを通る円62と同一の円上に位置するように形成されている。また、この一対の高さ規制ボス57,57は、円柱形状に形成されており、基板42上に載置されたシート部材43の表面43aから光束制御部材45の裏面56までの隙間寸法が所定寸法となるように、その突出量(突出高さ)が決定されている(図18,図20参照)。すなわち、光束制御部材45は、一対の高さ規制ボス57,57の先端が基板42上に載置されたシート部材43の表面43aに当接するまで、一対の固定用支持脚48,48が基板42の貫通穴47に装着されたスリーブ46に係合されると、基板42の表面42aの法線方向に対して位置決めされる(図18(b)参照)。ここで、一対の高さ規制ボス57,57の先端が基板42上に載置されたシート部材43の表面43aに当接した状態で、一対の固定用支持脚48,48の先端がスリーブ46の下方へ突出せず、且つ、一対の固定用支持脚48,48がスリーブ46の光束制御部材保持爪60で弾性的に保持されるように、一対の固定用支持脚48,48の方が一対の高さ規制ボス57,57よりも裏面56から大きく突出している(図18(b),図20(b)参照)。   Further, the pair of height regulating bosses 57 and 57 are the center 57a of one height regulating boss 57 and the center 57a of the other height regulating boss 57 in the rear view of the light flux controlling member 45 shown in FIG. A line 61 that connects the center of the light flux controlling member 45 intersects the center 45a (optical axis L), and the center 48a. It is formed so as to be orthogonal to a line 58 connecting 48a. Further, the pair of height restricting bosses 57, 57 is a pair of fixing support legs 48, 48 centering on the optical axis L of the light beam control member 45 in the rear view of the light beam control member 45 shown in FIG. Are located on the same circle as the circle 62 passing through the centers 48a, 48a. The pair of height regulating bosses 57 and 57 are formed in a cylindrical shape, and a gap dimension from the front surface 43a of the sheet member 43 placed on the substrate 42 to the rear surface 56 of the light flux controlling member 45 is predetermined. The projection amount (projection height) is determined so as to be the dimension (see FIGS. 18 and 20). That is, the light beam control member 45 has the pair of fixing support legs 48 and 48 mounted on the substrate until the tips of the pair of height regulating bosses 57 and 57 come into contact with the surface 43a of the sheet member 43 placed on the substrate 42. When engaged with the sleeve 46 mounted in the through hole 47 of 42, it is positioned with respect to the normal direction of the surface 42a of the substrate 42 (see FIG. 18B). Here, with the tips of the pair of height regulating bosses 57, 57 in contact with the surface 43 a of the sheet member 43 placed on the substrate 42, the tips of the pair of fixing support legs 48, 48 are the sleeve 46. And the pair of fixing support legs 48 and 48 are elastically held by the light flux controlling member holding claws 60 of the sleeve 46 so that the pair of fixing support legs 48 and 48 are not protruded downward. The pair of height restricting bosses 57 and 57 protrude from the back surface 56 more greatly than the pair of height restricting bosses 57 and 57 (see FIGS. 18B and 20B).

なお、上述の説明において、光束制御部材45は、光軸Lを対称軸として、同一円上に一対の固定用支持脚48及び高さ規制ボス57を形成する例を示したが、これに限らず、固定用支持脚48及び高さ規制ボス57を3つ以上形成してもよく、その形成位置は同一円上でなくてもよい。固定用支持脚48は基板42への固定が十分となるように、また、高さ規制ボス57は光束制御部材45の裏面56が基板42と平行となるように位置決めができるように最適な形状が設計される。   In the above description, the light beam control member 45 has shown an example in which the pair of fixing support legs 48 and the height regulating boss 57 are formed on the same circle with the optical axis L as the axis of symmetry. Alternatively, three or more fixing support legs 48 and height regulating bosses 57 may be formed, and the formation positions may not be on the same circle. The fixing support leg 48 is optimally fixed to the substrate 42, and the height regulating boss 57 is optimally positioned so that the back surface 56 of the light flux controlling member 45 is parallel to the substrate 42. Is designed.

(スリーブ)
図21〜図23は、スリーブ46を示す図である。このうち、図21(a)がスリーブ46の平面図、図21(b)がスリーブ46の正面図、図21(c)がスリーブ46の裏面図である。また、図22は、図21(a)のA4−A4線に沿って切断して示すスリーブ46の断面図である。また、図23は、図21(b)のA5−A5線に沿って切断して示すスリーブ46の胴部63の断面図である。
(sleeve)
21 to 23 are diagrams showing the sleeve 46. 21A is a plan view of the sleeve 46, FIG. 21B is a front view of the sleeve 46, and FIG. 21C is a back view of the sleeve 46. FIG. 22 is a cross-sectional view of the sleeve 46 cut along the line A4-A4 in FIG. FIG. 23 is a cross-sectional view of the trunk portion 63 of the sleeve 46 shown cut along the line A5-A5 in FIG.

これらの図に示すスリーブ46は、一様な板厚で且つ弾性変形可能な薄板金属(例えば、ばね用リン青銅)をプレス加工して形成されたものであり、略筒状の胴部63と、この胴部63の一端63a(図21(b)における下端)から径方向外方へ向かって拡がるフランジ部64とを備えている。そして、このスリーブ46は、平面視した形状が略C字形状となるように、胴部63の一端63aから胴部63の他端63b(図21(b)における上端)まで胴部63の中心軸線65に沿って延びるスリット66が形成されている。そして、このスリーブ46は、スリット66の間隔を狭めるようにして、縮径方向に弾性変形できるようになっている。なお、スリーブ46は、図24(a)に示すように、胴部63の他端63bを基板42の貫通穴47に係合するようになっているため、胴部63の他端63bの外周縁に沿って面取りを施すことが好ましい。   The sleeve 46 shown in these drawings is formed by pressing a thin plate metal (for example, phosphor bronze for spring) having a uniform plate thickness and elastically deformable. The body portion 63 includes a flange portion 64 that expands radially outward from one end 63a (the lower end in FIG. 21B). The sleeve 46 has a center of the body portion 63 from one end 63a of the body portion 63 to the other end 63b of the body portion 63 (upper end in FIG. 21B) so that the shape in plan view is substantially C-shaped. A slit 66 extending along the axis 65 is formed. The sleeve 46 can be elastically deformed in the direction of diameter reduction by narrowing the interval between the slits 66. As shown in FIG. 24A, the sleeve 46 is configured to engage the other end 63b of the barrel 63 with the through hole 47 of the substrate 42. It is preferable to chamfer along the periphery.

また、スリーブ46は、胴部63の他端63b寄りの部分に、胴部63の径方向外方側へ向かって部分的に膨出するように切り起こされた基板押さえ爪67が、胴部63の周方向に沿って等間隔に(図21(a)及び図23において、120°の間隔で)3箇所形成されている。この基板押さえ爪67は、胴部63の他端63b側から胴部の一端63a側へ向かって張り出し量を漸増させるように傾斜する係合案内部68と、この係合案内部68の最大張出部分から胴部63の一端63a側へ向かって胴部63の中心軸線65が延びる方向と平行に形成されたリブ状張出部70とからなっている(図22参照)。   Also, the sleeve 46 has a body pressing claw 67 cut and raised at a portion near the other end 63b of the body 63 so as to partially bulge toward the radially outer side of the body 63. Three portions are formed at regular intervals along the circumferential direction 63 (at intervals of 120 ° in FIGS. 21A and 23). The substrate pressing claw 67 includes an engagement guide portion 68 that inclines so as to gradually increase the amount of protrusion from the other end 63b side of the body portion 63 toward the one end 63a side of the body portion, and a maximum tension of the engagement guide portion 68. A rib-like projecting portion 70 formed in parallel with the direction in which the central axis 65 of the trunk portion 63 extends from the protruding portion toward the one end 63a of the trunk portion 63 (see FIG. 22).

また、スリーブ46は、胴部63の基板押さえ爪67とフランジ部64との間の部分から径方向内方側へ向かって部分的に切り起こされた光束制御部材保持爪60が、胴部63の周方向に沿って等間隔に3箇所形成されている。なお、本参考例における光束制御部材保持爪60は、図21(a)及び図23に示すように、胴部63の周方向に120°の間隔で、基板押さえ爪67と同一位置に3箇所形成されている。また、この光束制御部材保持爪60は、胴部63の一端63a側へ向かうに従って張り出し量を漸増させるように形成されており、光束制御部材45の固定用支持脚48を弾性変形した状態で保持するようになっている。   Further, the sleeve 46 has a light beam control member holding claw 60 partially cut and raised from the portion between the substrate pressing claw 67 and the flange portion 64 of the body portion 63 toward the radially inward side. Are formed at three equal intervals along the circumferential direction. 21A and 23, the light flux controlling member holding claws 60 in this reference example are arranged at three positions at the same position as the substrate pressing claws 67 at intervals of 120 ° in the circumferential direction of the body portion 63. Is formed. Further, the light flux controlling member holding claw 60 is formed so as to gradually increase the amount of protrusion as it goes toward the one end 63a side of the body portion 63, and the fixing support leg 48 of the light flux controlling member 45 is held in an elastically deformed state. It is supposed to be.

また、スリーブ46のフランジ部64は、図21(a),(c)に示すように、胴部63のスリット66に対応する位置に、スリット66から径方向外方へ向かうにしたがって僅かに幅を拡げる切り欠き部71が形成されている。また、フランジ部64は、この切り欠き部71から胴部63の中心軸線65の回りに90°の等間隔で円弧状の切り込み部72が3箇所形成されている。そして、フランジ部64は、切り欠き部71及び切り込み部72以外の部分が一定の外径寸法となるように、胴部63の一端63aから鍔状に折り曲げて形成されている。このように、スリーブ46は、フランジ部64に切り欠き部71及び切り込み部72が形成されることにより、胴部63が弾性的に縮径変形できると共に、胴部63が元の形状に弾性的に復元できるようになっている。なお、本参考例において、フランジ部64の切り込み部72は、上述のように等間隔で3箇所形成する態様を例示したが、これに限られず、切り欠き部71と対向する位置(図21(a)において、胴部63の中心軸線65の回りに、切り欠き部71の位置から180°回転した位置)に少なくとも1箇所形成すればよい。ただし、スリーブ46を形成する際のプレス工程における筒状への丸め加工を考慮すると、本参考例のように、切り込み部72を3箇所形成することが好ましい。   Further, as shown in FIGS. 21A and 21C, the flange portion 64 of the sleeve 46 is slightly widened in a position corresponding to the slit 66 of the body portion 63 from the slit 66 toward the outer side in the radial direction. A notch portion 71 is formed to widen the width. Further, the flange portion 64 has three arc-shaped cut portions 72 formed at equal intervals of 90 ° around the center axis 65 of the body portion 63 from the notch portion 71. The flange portion 64 is formed by bending from one end 63a of the body portion 63 in a hook shape so that portions other than the cutout portion 71 and the cutout portion 72 have a constant outer diameter. Thus, the sleeve 46 is formed with the notch portion 71 and the notch portion 72 in the flange portion 64, so that the body portion 63 can be elastically deformed in a reduced diameter, and the body portion 63 is elastically restored to its original shape. Can be restored. In the present reference example, the cut portions 72 of the flange portion 64 are illustrated as being formed at three equal intervals as described above. However, the present invention is not limited to this, and the positions facing the cut portions 71 (FIG. 21 ( In a), at least one position may be formed around the central axis 65 of the body 63 at a position rotated 180 ° from the position of the notch 71. However, in consideration of rounding into a cylindrical shape in the pressing step when forming the sleeve 46, it is preferable to form three cut portions 72 as in this reference example.

また、スリーブ46のフランジ部64は、図22に示すように、径方向外方側へ向かうに従って僅かに上方へ向かって傾斜(例えば、水平面となす角度θが2°となるように傾斜)しており、基板42の裏面42bに傾斜角度θを減ずる方向に弾性変形した状態で当接し、基板押さえ爪67の下端との間に基板42を弾性的に挟持できるようになっている(図18(b)参照)。   Further, as shown in FIG. 22, the flange portion 64 of the sleeve 46 is slightly inclined upward (for example, the angle θ formed with the horizontal plane is 2 °) as it goes radially outward. The substrate 42 is brought into contact with the back surface 42b of the substrate 42 in a state where it is elastically deformed in the direction of decreasing the inclination angle θ, so that the substrate 42 can be elastically held between the lower ends of the substrate pressing claws 67 (FIG. 18). (See (b)).

なお、以上の説明において、スリーブ46は、基板押さえ爪67と光束制御部材保持爪60を胴部63の周方向に120°の間隔で同一位置に3箇所形成した例を示したが、これに限らず、周方向において基板押さえ爪67と光束制御部材保持爪60の位置をずらして形成してもよい。その場合、光束制御部材保持爪60は、光束制御部材45の固定用支持脚48を中心に合わせて固定できるよう3箇所に形成することが好ましいが、基板押さえ爪67は2箇所以上に形成されていればよい。   In the above description, the sleeve 46 has been shown as an example in which the substrate pressing claw 67 and the light flux controlling member holding claw 60 are formed at the same position at 120 ° intervals in the circumferential direction of the body portion 63. Not limited to this, the positions of the substrate pressing claw 67 and the light flux controlling member holding claw 60 may be shifted in the circumferential direction. In that case, the light flux controlling member holding claws 60 are preferably formed at three positions so that the fixing support legs 48 of the light flux controlling member 45 can be fixed in the center, but the substrate pressing claws 67 are formed at two or more positions. It only has to be.

(発光装置の組立手順)
図24(a)〜(c)は、発光装置41の組立手順を示すものである。
(Assembly procedure of light emitting device)
24A to 24C show an assembling procedure of the light emitting device 41. FIG.

図24(a)に示すように、基板42には、予め発光素子44が実装されている。そして、発光素子44が実装された基板42の上面42a側(表面側)には、シート部材43が重ねて配置される。この際、シート部材43は、開口部51に発光素子44を係合し、開口部51から発光素子44の発光部44aをシート部材43の上方空間へ露出させ、且つ、係合穴52を基板42の貫通穴47上に合致させるようにして基板42上に配置される。   As shown in FIG. 24A, a light emitting element 44 is mounted on the substrate 42 in advance. And the sheet | seat member 43 is piled up and arrange | positioned at the upper surface 42a side (surface side) of the board | substrate 42 with which the light emitting element 44 was mounted. At this time, the sheet member 43 engages the light emitting element 44 in the opening 51, exposes the light emitting part 44a of the light emitting element 44 from the opening 51 to the space above the sheet member 43, and the engagement hole 52 is formed in the substrate. It is arranged on the substrate 42 so as to be matched with the through hole 47 of the 42.

次に、図24(a)において、基板42の貫通穴47に対し、基板42の裏面42b側からスリーブ46の胴部63の他端63bを係合する。次いで、スリーブ46の胴部63を基板42の貫通穴47に押し込むようにして、スリーブ46を基板42に取り付ける。この際、スリーブ46は、基板押さえ爪67の係合案内部68が基板42の貫通穴47の下端縁47bによって押圧され、貫通穴47に押し込まれるにしたがって、胴部63が縮径方向に弾性変形し、基板押さえ爪67が胴部63の弾性変形に伴って径方向内方へ変位する。スリーブ46がさらに基板42の貫通穴47内に押し込まれ、基板42の下端縁47bと基板押さえ爪67のリブ状張出部68が接触すると、胴部63の縮径方向への弾性変形が終了し、胴部63が基板42の貫通穴47の内壁に対して一定の隙間をもって移動する。そして、スリーブ46は、そのフランジ部64が基板42の裏面42bに当接するまで貫通穴47内に押し込まれると、スリーブ46の基板押さえ爪67が貫通穴47を通過して基板42の表面42a側の空間に露出し、胴部63が元の形状に弾性復帰する(図18(b)参照)。これにより、スリーブ46は、フランジ部64と基板押さえ爪67とで基板42を上下方向(表裏方向)に挟持し、胴部63が基板42の貫通穴47に密接した状態で係合して、基板42に確実に且つ着脱可能な状態で固定される(図18(b),図24(b)参照)。   Next, in FIG. 24A, the other end 63 b of the body 63 of the sleeve 46 is engaged with the through hole 47 of the substrate 42 from the back surface 42 b side of the substrate 42. Next, the sleeve 46 is attached to the substrate 42 such that the body 63 of the sleeve 46 is pushed into the through hole 47 of the substrate 42. At this time, as the sleeve 46 is pressed by the lower edge 47 b of the through hole 47 of the board 42 and the engagement guide part 68 of the board pressing claw 67 is pushed into the through hole 47, the body part 63 is elastic in the diameter reducing direction. The substrate pressing claw 67 is deformed and displaced inward in the radial direction as the body 63 is elastically deformed. When the sleeve 46 is further pushed into the through hole 47 of the substrate 42 and the lower end edge 47b of the substrate 42 and the rib-like protruding portion 68 of the substrate pressing claw 67 come into contact with each other, the elastic deformation of the body portion 63 in the reduced diameter direction is completed. Then, the body 63 moves with a certain gap with respect to the inner wall of the through hole 47 of the substrate 42. When the sleeve 46 is pushed into the through hole 47 until the flange portion 64 contacts the back surface 42b of the substrate 42, the substrate pressing claw 67 of the sleeve 46 passes through the through hole 47 and the surface 42a side of the substrate 42 is reached. The body 63 is elastically restored to its original shape (see FIG. 18B). As a result, the sleeve 46 sandwiches the substrate 42 in the vertical direction (front and back direction) with the flange portion 64 and the substrate pressing claw 67, and the body portion 63 engages with the through hole 47 of the substrate 42 in close contact, It is securely and detachably fixed to the substrate 42 (see FIGS. 18B and 24B).

次に、光束制御部材45の裏面56に形成された固定用支持脚48を、基板42に固定したスリーブ46内に基板42の上方から挿入する(図24(b)参照)。この際、光束制御部材45の固定用支持脚48は、先端に向かうにしたがって細くなるようにテーパ状に形成されており、その先端の外径がスリーブ46の胴部63の内径よりも小径に形成されているため、スリーブ46内に容易に挿入される。そして、光束制御部材45の固定用支持脚48は、スリーブ46の胴部63内に張り出した光束制御部材保持爪60を撓み変形させながら、光束制御部材45の高さ規制ボス57がシート部材43の表面43aに当接するまで挿入され、光束制御部材保持爪60の弾性力でスリーブ46の胴部63内に保持される(図18(b),図24(c)参照)。この際、光束制御部材45の固定用支持脚48は、その中心48aがスリーブ46の胴部63の中心軸線65に合致するように位置決めされ(図20(c),図21(a)参照)、且つ、胴部63の内壁面との間に隙間が生じるように、外周面の3箇所が等間隔で光束制御部材保持爪60により弾性支持される(図18(b),図21(a)参照)。その結果、光束制御部材45は、その光軸Lが発光素子44の光軸L1にほぼ合致するように、基板42の表面42aに対して水平方向及び垂直方向に位置決めされた状態で、スリーブ46を介して基板42に保持される(図18(b),図24(c)参照)。これによって、発光装置の組立作業が終了する。   Next, the fixing support leg 48 formed on the back surface 56 of the light flux controlling member 45 is inserted into the sleeve 46 fixed to the substrate 42 from above the substrate 42 (see FIG. 24B). At this time, the fixing support leg 48 of the light flux controlling member 45 is tapered so as to become thinner toward the tip, and the outer diameter of the tip is smaller than the inner diameter of the body 63 of the sleeve 46. Since it is formed, it is easily inserted into the sleeve 46. The fixing support leg 48 of the light beam control member 45 flexes and deforms the light beam control member holding claw 60 projecting into the body 63 of the sleeve 46, while the height regulating boss 57 of the light beam control member 45 is moved to the sheet member 43. Until it comes into contact with the surface 43a, and is held in the body 63 of the sleeve 46 by the elastic force of the light flux controlling member holding claw 60 (see FIGS. 18B and 24C). At this time, the fixing support leg 48 of the light flux controlling member 45 is positioned so that the center 48a thereof coincides with the central axis 65 of the trunk portion 63 of the sleeve 46 (see FIGS. 20C and 21A). In addition, three locations on the outer peripheral surface are elastically supported by the light flux controlling member holding claws 60 at equal intervals so that a gap is formed between the inner wall surface of the body portion 63 (FIGS. 18B and 21A). )reference). As a result, the light flux controlling member 45 is positioned in the horizontal direction and the vertical direction with respect to the surface 42a of the substrate 42 so that the optical axis L thereof substantially coincides with the optical axis L1 of the light emitting element 44. (See FIG. 18B and FIG. 24C). Thereby, the assembly operation of the light emitting device is completed.

ここで、スリーブ46の光束制御部材保持爪60は、樹脂材料製の光束制御部材45の固定用支持脚48よりも硬いため、その先端が固定用支持脚48に食い込むようになっている。とりわけ、発光素子44が点灯させられて発熱し、光束制御部材45が温度上昇すると、光束制御部材45が発光素子44の点灯前よりも一層柔らかくなるため、固定用支持脚48への光束制御部材保持爪60の食い込む量が大きくなる。その結果、光束制御部材45は、基板42から引き離す方向の外力が作用しても、基板42から容易に離脱することがなく、スリーブ46を介して基板42に確実に固定される(図18(b)参照)。   Here, since the light flux controlling member holding claw 60 of the sleeve 46 is harder than the fixing support leg 48 of the light flux controlling member 45 made of a resin material, its tip bites into the fixing support leg 48. In particular, when the light emitting element 44 is turned on to generate heat and the light flux controlling member 45 rises in temperature, the light flux controlling member 45 becomes softer than before the light emitting element 44 is turned on, and thus the light flux controlling member to the fixing support leg 48. The amount of biting of the holding claws 60 increases. As a result, the light flux controlling member 45 does not easily detach from the substrate 42 even when an external force in the direction away from the substrate 42 acts, and is securely fixed to the substrate 42 via the sleeve 46 (FIG. 18 ( b)).

また、光束制御部材45がスリーブ46を介して基板42に固定された後、温度変化や環境変化(例えば湿度変化)によって光束制御部材45と基板42との間に寸法変化(膨張差や収縮差)が生じたとしても、スリーブ46の光束制御部材保持爪60の弾性変形によって吸収することができる。その結果、本参考例4の発光装置41は、温度変化や環境変化(例えば湿度変化)によって光束制御部材45と基板42との間に寸法変化(膨張差や収縮差)が生じたとしても、光束制御部材45がスリーブ46を介して基板42に確実に固定され、光束制御部材45が基板42から脱落するようなことがない。   In addition, after the light flux controlling member 45 is fixed to the substrate 42 via the sleeve 46, a dimensional change (expansion difference or shrinkage difference) occurs between the light flux controlling member 45 and the substrate 42 due to a temperature change or environmental change (for example, a humidity change). ) Can be absorbed by the elastic deformation of the light flux controlling member holding claws 60 of the sleeve 46. As a result, even if the light emitting device 41 of the present reference example 4 undergoes a dimensional change (expansion difference or contraction difference) between the light flux controlling member 45 and the substrate 42 due to temperature change or environmental change (for example, humidity change), The light flux controlling member 45 is securely fixed to the substrate 42 via the sleeve 46, and the light flux controlling member 45 does not fall off the substrate 42.

また、以上のようにして組み立てられた発光装置41は、光束制御部材45の高さ規制ボス57がシート部材43の表面43aに当接しているため、シート部材43を光束制御部材45の高さ規制ボス57で基板42上に固定でき、シート部材43が基板42から浮き上がるのを光束制御部材45の高さ規制ボス57で防止することができる(図18(b),図24(c)参照)。   Further, in the light emitting device 41 assembled as described above, since the height regulating boss 57 of the light flux controlling member 45 is in contact with the surface 43a of the sheet member 43, the sheet member 43 is placed at the height of the light flux controlling member 45. The restriction boss 57 can fix the sheet member 43 on the substrate 42, and the height restriction boss 57 of the light beam control member 45 can prevent the sheet member 43 from being lifted from the substrate 42 (see FIGS. 18B and 24C). ).

(参考例4の効果)
以上のように、参考例4の発光装置41によれば、一対の固定用支持脚48,48及び一対の高さ規制ボス57,57が、光束制御部材45のうちの光の出射に悪影響を与えない裏面56側に形成されている。しかも、参考例4の発光装置41によれば、光束制御部材45の裏面56側に突出形成された一対の固定用支持脚48,48が基板42に固定されたスリーブ46,46によって弾性的に保持されるようになっており、光束制御部材45を基板42に保持するための保持手段が光束制御部材45の光制御出射面54側に配置されることがなく、保持手段によって光束制御部材45からの出射光を妨げるようなことがないため、照明品質の低下を招くことなく、光束制御部材45を基板42に固定することができる。
(Effect of Reference Example 4)
As described above, according to the light emitting device 41 of the reference example 4, the pair of fixing support legs 48 and 48 and the pair of height regulating bosses 57 and 57 adversely affect the light emission of the light flux controlling member 45. It is formed on the back surface 56 side that is not provided. In addition, according to the light emitting device 41 of the reference example 4, the pair of fixing support legs 48, 48 protruding from the back surface 56 side of the light flux controlling member 45 are elastically provided by the sleeves 46, 46 fixed to the substrate 42. The holding means for holding the light flux control member 45 on the substrate 42 is not disposed on the light control exit surface 54 side of the light flux control member 45, and the light flux control member 45 is held by the holding means. Therefore, the light flux controlling member 45 can be fixed to the substrate 42 without deteriorating the illumination quality.

また、参考例4の発光装置41によれば、光束制御部材45の固定用支持脚48が基板42に固定されたスリーブ46の光束制御部材保持爪60によって弾性的に保持され、温度変化や環境変化(例えば湿度変化)によって光束制御部材45と基板42との間に寸法変化(膨張差や収縮差)が生じたとしても、その寸法変化をスリーブ46の光束制御部材保持爪60の弾性変形によって吸収することができるため、光束制御部材45を基板42に対して安定して位置決めし且つ保持することが可能になる。   Further, according to the light emitting device 41 of the reference example 4, the fixing support leg 48 of the light beam control member 45 is elastically held by the light beam control member holding claws 60 of the sleeve 46 fixed to the substrate 42, and the temperature change and environment Even if a dimensional change (expansion difference or contraction difference) occurs between the light flux control member 45 and the substrate 42 due to a change (for example, a humidity change), the dimensional change is caused by elastic deformation of the light flux control member holding claw 60 of the sleeve 46. Since the light can be absorbed, the light flux controlling member 45 can be stably positioned and held with respect to the substrate 42.

(参考例4に係る発光装置の使用例)
以上のように構成された参考例4に係る発光装置41は、、光拡散部材を介して面状の照明光を出射する面光源装置の構成部分として、単独で使用されるか、又はマトリックス状に複数配置されて使用される。また、参考例4に係る発光装置41は、面光源装置によって被照明物(液晶表示パネルや広告表示パネル等)が面状に照明される表示装置の構成部分として使用される。
(Usage example of light emitting device according to Reference Example 4)
The light emitting device 41 according to Reference Example 4 configured as described above is used alone as a component of a surface light source device that emits planar illumination light via a light diffusing member, or in a matrix form. It is used by arranging two or more. In addition, the light emitting device 41 according to Reference Example 4 is used as a component of a display device in which an object to be illuminated (a liquid crystal display panel, an advertisement display panel, or the like) is illuminated in a planar shape by a surface light source device.

<参考例5>
以下、参考例5に係る発光装置41を図面に基づき詳述する。
<Reference Example 5>
Hereinafter, the light emitting device 41 according to Reference Example 5 will be described in detail with reference to the drawings.

図25は、参考例5に係る発光装置41の概略構成を示すものである。なお、図25(a)は、発光装置41の平面図である。また、図25(b)は、図25(a)のA6−A6線に沿って切断して示す発光装置41の断面図である。   FIG. 25 shows a schematic configuration of the light emitting device 41 according to Reference Example 5. FIG. 25A is a plan view of the light emitting device 41. FIG. 25B is a cross-sectional view of the light-emitting device 41 cut along the line A6-A6 in FIG.

この図25に示す発光装置41は、光束制御部材45を基板42に取り付けるために使用されるスリーブ(保持手段)46が参考例4と異なる点を除き、その基本的構成が参考例4に係る発光装置41と同様である。したがって、この参考例5に係る発光装置41の説明において、参考例4に係る発光装置41と同様の構成部分には同一符号を付し、参考例4に係る発光装置41の説明と重複する説明を省略する。   The light emitting device 41 shown in FIG. 25 has a basic configuration according to Reference Example 4 except that a sleeve (holding means) 46 used for attaching the light flux controlling member 45 to the substrate 42 is different from Reference Example 4. This is the same as the light emitting device 41. Therefore, in the description of the light emitting device 41 according to the reference example 5, the same components as those of the light emitting device 41 according to the reference example 4 are denoted by the same reference numerals, and the description overlapping the description of the light emitting device 41 according to the reference example 4. Is omitted.

(スリーブの構成)
図26〜図28は、参考例5の発光装置41に使用されるスリーブ46を示す図である。このうち、図26(a)がスリーブ46の平面図、図26(b)がスリーブ46の正面図、図26(c)がスリーブ46の裏面図である。また、図27は、図26(a)のA7−A7線に沿って切断して示すスリーブ46の断面図である。また、図28は、図26(b)のA8−A8線に沿って切断して示すスリーブ46の胴部63の断面図である。なお、これらの図に示すスリーブ46は、フランジ部64と基板押さえ爪67との間の間隔及び光束制御部材保持爪60の形状を除き、他の構成が参考例4のスリーブ46と同様であるので、参考例4のスリーブ46に対応する部分には同一符号を付し。参考例4のスリーブ46の説明と重複する説明を省略する。
(Sleeve structure)
26 to 28 are diagrams illustrating a sleeve 46 used in the light emitting device 41 of Reference Example 5. FIG. 26A is a plan view of the sleeve 46, FIG. 26B is a front view of the sleeve 46, and FIG. 26C is a back view of the sleeve 46. FIG. 27 is a cross-sectional view of the sleeve 46 cut along the line A7-A7 in FIG. FIG. 28 is a cross-sectional view of the trunk portion 63 of the sleeve 46 shown cut along the line A8-A8 in FIG. The sleeve 46 shown in these drawings is the same as the sleeve 46 of the reference example 4 except for the interval between the flange portion 64 and the substrate pressing claw 67 and the shape of the light flux controlling member holding claw 60. Therefore, the same reference numerals are given to the portions corresponding to the sleeve 46 of the reference example 4. A description overlapping the description of the sleeve 46 of Reference Example 4 is omitted.

これらの図に示すスリーブ46の光束制御部材保持爪60は、胴部63のうちのフランジ部64寄りの部分から胴部63の他端63b側(図27の上端側)へ向かって切り起こされており、胴部63の他端63b側へ向かうに従って胴部63の内方への張り出し量を漸増させるように形成されている。   The light flux controlling member holding claws 60 of the sleeve 46 shown in these drawings are cut and raised from the portion of the body portion 63 near the flange portion 64 toward the other end 63b side (the upper end side in FIG. 27) of the body portion 63. The body 63 is formed so as to gradually increase the inward projecting amount toward the other end 63b of the body 63.

そして、これらの図に示した参考例5に係るスリーブ46は、図25(b)及び図29(a)に示すように、上下を反転させた状態で、基板42の表面42a(上面)側から基板42の貫通穴47に装着される。   Then, the sleeve 46 according to the reference example 5 shown in these drawings has a surface 42a (upper surface) side of the substrate 42 in an inverted state as shown in FIGS. 25 (b) and 29 (a). To the through hole 47 of the substrate 42.

(発光装置の組立手順)
図29(a)〜(c)は、参考例5に係る発光装置の組立手順を示すものである。
(Assembly procedure of light emitting device)
FIGS. 29A to 29C show the procedure for assembling the light emitting device according to Reference Example 5. FIG.

図29(a)に示すように、基板42には、予め発光素子44(例えば、LED)が実装されている。そして、発光素子44が実装された基板42の表面42a側(上面側)には、シート部材43が重ねて配置される。この際、シート部材43は、開口部51に発光素子44を係合し、開口部51から発光素子44の発光部44aをシート部材43の上方空間へ露出させ、且つ、係合穴52を基板42の貫通穴47上に合致させるようにして基板42上に配置される。   As shown in FIG. 29A, a light emitting element 44 (for example, LED) is mounted on the substrate 42 in advance. And the sheet | seat member 43 is arrange | positioned on the surface 42a side (upper surface side) of the board | substrate 42 with which the light emitting element 44 was mounted. At this time, the sheet member 43 engages the light emitting element 44 in the opening 51, exposes the light emitting part 44a of the light emitting element 44 from the opening 51 to the space above the sheet member 43, and the engagement hole 52 is formed in the substrate. It is arranged on the substrate 42 so as to be matched with the through hole 47 of the 42.

次に、図29(a)において、基板42の貫通穴47に対し、図26(b)及び図27に示したスリーブ46を上下反転させた姿勢とし、基板42の表面42a側からスリーブ46の胴部63の他端63bを貫通穴47の上端縁47cに係合する。次いで、スリーブ46の胴部63を基板42の貫通穴47に押し込むようにして、スリーブ46を基板42に取り付ける。この際、スリーブ46は、基板押さえ爪67の係合案内部68が基板42の貫通穴47の上端縁47cによって押圧され、貫通穴47に押し込まれるにしたがって、胴部63が縮径方向に弾性変形し、基板押さえ爪67が胴部63の弾性変形に伴って径方向内方へ変位する。スリーブ46がさらに基板42の貫通穴47内に押し込まれ、基板42の上端縁47cと基板押さえ爪67のリブ状張出部70が接触すると、胴部63の縮径方向への弾性変形が終了し、胴部63が基板42の貫通穴47の内壁に対して一定の隙間をもって移動する。そして、スリーブ46は、そのフランジ部64がシート部材43の表面43aに当接するまで貫通穴47内に押し込まれると、基板押さえ爪67が貫通穴47を通過して基板42の裏面42b側の空間に露出し、胴部63が元の形状に弾性復帰する。これにより、スリーブ46は、フランジ部64と基板押さえ爪67とで基板42及びシート部材43を表裏方向(上下方向)に挟持し、胴部63が基板42の貫通穴47に密接した状態で係合して、基板42に確実に且つ着脱可能な状態で固定される(図29(b)参照)。   Next, in FIG. 29A, the sleeve 46 shown in FIGS. 26B and 27 is turned upside down with respect to the through hole 47 of the substrate 42, and the sleeve 46 extends from the surface 42 a side of the substrate 42. The other end 63 b of the body portion 63 is engaged with the upper end edge 47 c of the through hole 47. Next, the sleeve 46 is attached to the substrate 42 such that the body 63 of the sleeve 46 is pushed into the through hole 47 of the substrate 42. At this time, as the sleeve 46 is pressed by the upper end edge 47 c of the through hole 47 of the substrate 42 by the engagement guide portion 68 of the substrate pressing claw 67 and is pushed into the through hole 47, the body portion 63 is elastic in the reduced diameter direction. The substrate pressing claw 67 is deformed and displaced inward in the radial direction as the body 63 is elastically deformed. When the sleeve 46 is further pushed into the through hole 47 of the substrate 42 and the upper end edge 47c of the substrate 42 and the rib-like protruding portion 70 of the substrate pressing claw 67 come into contact with each other, the elastic deformation of the body portion 63 in the reduced diameter direction is completed. Then, the body 63 moves with a certain gap with respect to the inner wall of the through hole 47 of the substrate 42. When the sleeve 46 is pushed into the through hole 47 until the flange portion 64 contacts the surface 43 a of the sheet member 43, the board pressing claw 67 passes through the through hole 47 and the space on the back surface 42 b side of the board 42. The body 63 is elastically restored to its original shape. As a result, the sleeve 46 holds the substrate 42 and the sheet member 43 in the front and back direction (vertical direction) between the flange portion 64 and the substrate pressing claw 67, and the sleeve portion 63 is in close contact with the through hole 47 of the substrate 42. Thus, the substrate 42 is securely and detachably fixed (see FIG. 29B).

次に、図29(b)に示すように、光束制御部材45の裏面56に形成された固定用支持脚48を、基板42に固定したスリーブ46内に基板42の上方から挿入する。この際、光束制御部材45の固定用支持脚48は、先端に向かうにしたがって細くなるようにテーパ状に形成されており、その先端の外径がスリーブ46の胴部63の内径よりも小径に形成されているため、スリーブ46内に容易に挿入される。そして、光束制御部材45の固定用支持脚48は、スリーブ46の胴部63内に張り出した光束制御部材保持爪60を撓み変形させながら、光束制御部材45の高さ規制ボス57がシート部材43の表面43aに当接するまで挿入され、光束制御部材保持爪60の弾性力でスリーブ46の胴部63内に保持される(図25,図29(c)参照)。この際、光束制御部材45の固定用支持脚48は、その中心48aがスリーブ46の胴部63の中心軸線65に合致するように、且つ、胴部63の内壁面との間に隙間が生じるように、外周面の3箇所が等間隔で光束制御部材保持爪60により弾性支持される。その結果、光束制御部材45は、その光軸Lが発光素子44の光軸L1にほぼ合致するように、基板42の表面42aに対して水平方向及び垂直方向に位置決めされた状態で、スリーブ46を介して基板42に保持される。これによって、発光装置41の組立作業が終了する。   Next, as shown in FIG. 29B, the fixing support leg 48 formed on the back surface 56 of the light flux controlling member 45 is inserted into the sleeve 46 fixed to the substrate 42 from above the substrate 42. At this time, the fixing support leg 48 of the light flux controlling member 45 is tapered so as to become thinner toward the tip, and the outer diameter of the tip is smaller than the inner diameter of the body 63 of the sleeve 46. Since it is formed, it is easily inserted into the sleeve 46. The fixing support leg 48 of the light beam control member 45 flexes and deforms the light beam control member holding claw 60 projecting into the body 63 of the sleeve 46, while the height regulating boss 57 of the light beam control member 45 is moved to the sheet member 43. Until it comes into contact with the surface 43a of the lens, and is held in the body 63 of the sleeve 46 by the elastic force of the light flux controlling member holding claw 60 (see FIGS. 25 and 29C). At this time, the fixing support leg 48 of the light flux controlling member 45 has a gap between the center 48 a thereof and the center axis 65 of the body 63 of the sleeve 46 and the inner wall surface of the body 63. As described above, the three places on the outer peripheral surface are elastically supported by the light flux controlling member holding claws 60 at equal intervals. As a result, the light flux controlling member 45 is positioned in the horizontal direction and the vertical direction with respect to the surface 42a of the substrate 42 so that the optical axis L thereof substantially coincides with the optical axis L1 of the light emitting element 44. It is held on the substrate 42 via. Thereby, the assembly work of the light emitting device 41 is completed.

ここで、図25(b)に示すように、基板42に装着されたスリーブ46の光束制御部材保持爪60は、図18(b)に示したスリーブ46の光束制御部材保持爪60と同様に、基板42の裏面42b側へ向かうに従って胴部63の内方へ出っ張る量が漸増するため、図18(b)に示したスリーブ46の光束制御部材保持爪60と同様に機能する。すなわち、スリーブ46の光束制御部材保持爪60は、樹脂材料製の光束制御部材45の固定用支持脚48よりも硬いため、その先端が固定用支持脚48に食い込むようになっている。とりわけ、発光素子44が点灯させられて発熱し、光束制御部材45が温度上昇すると、光束制御部材45が発光素子44の点灯前よりも一層柔らかくなるため、光束制御部材保持爪60が固定用支持脚48に食い込む量が大きくなる。その結果、光束制御部材45は、基板42から引き離す方向の外力が作用しても、基板42から容易に離脱することがなく、スリーブ46を介して基板42に確実に固定される。   Here, as shown in FIG. 25B, the light flux controlling member holding claw 60 of the sleeve 46 attached to the substrate 42 is similar to the light flux controlling member holding claw 60 of the sleeve 46 shown in FIG. Since the amount projecting inward of the body portion 63 gradually increases toward the back surface 42b side of the substrate 42, it functions in the same manner as the light flux controlling member holding claws 60 of the sleeve 46 shown in FIG. That is, the light flux controlling member holding claw 60 of the sleeve 46 is harder than the fixing support leg 48 of the light flux controlling member 45 made of a resin material, so that the tip thereof bites into the fixing support leg 48. In particular, when the light emitting element 44 is turned on to generate heat and the light flux controlling member 45 rises in temperature, the light flux controlling member 45 becomes softer than before the light emitting element 44 is turned on. The amount of biting into the leg 48 increases. As a result, the light flux controlling member 45 is securely fixed to the substrate 42 via the sleeve 46 without being easily detached from the substrate 42 even when an external force in a direction away from the substrate 42 is applied.

また、光束制御部材45がスリーブ46を介して基板42に固定された後、温度変化や環境変化(例えば湿度変化)によって光束制御部材45と基板42との間に寸法変化(膨張差や収縮差)が生じたとしても、その寸法変化をスリーブ46の光束制御部材保持爪60の弾性変形によって吸収することができる。その結果、参考例5の発光装置41は、温度変化や環境変化(例えば湿度変化)によって光束制御部材45と基板42との間に寸法変化(膨張差や収縮差)が生じたとしても、光束制御部材45がスリーブ46を介して基板42に確実に固定され、光束制御部材45が基板42から脱落するようなことがない。   In addition, after the light flux controlling member 45 is fixed to the substrate 42 via the sleeve 46, a dimensional change (expansion difference or shrinkage difference) occurs between the light flux controlling member 45 and the substrate 42 due to a temperature change or environmental change (for example, a humidity change). ) Can be absorbed by the elastic deformation of the light flux controlling member holding claws 60 of the sleeve 46. As a result, the light-emitting device 41 of Reference Example 5 has a luminous flux even if a dimensional change (expansion difference or shrinkage difference) occurs between the luminous flux control member 45 and the substrate 42 due to temperature change or environmental change (for example, humidity change). The control member 45 is securely fixed to the substrate 42 via the sleeve 46, and the light flux control member 45 is not dropped from the substrate 42.

また、以上のようにして組み立てられた発光装置41は、光束制御部材45の高さ規制ボス57がシート部材43の表面43aに当接しているため、シート部材43をスリーブ46のフランジ部64及び光束制御部材45の高さ規制ボス57で基板42上に固定でき、シート部材43が基板42上から浮き上がるのをスリーブ64のフランジ部64及び光束制御部材45の高さ規制ボス57で防止することができる。   Further, in the light emitting device 41 assembled as described above, since the height regulating boss 57 of the light flux controlling member 45 is in contact with the surface 43a of the sheet member 43, the sheet member 43 is attached to the flange portion 64 and the sleeve 46. The height restricting boss 57 of the light flux controlling member 45 can be fixed on the substrate 42, and the sheet member 43 is prevented from being lifted from the substrate 42 by the flange portion 64 of the sleeve 64 and the height restricting boss 57 of the light flux controlling member 45. Can do.

(参考例5の効果)
参考例5に係る発光装置41は、参考例4に係る発光装置41と同様の効果を得ることができる。
(Effect of Reference Example 5)
The light emitting device 41 according to Reference Example 5 can obtain the same effects as the light emitting device 41 according to Reference Example 4.

また、参考例5に係る発光装置41は、シート部材43をスリーブ46のフランジ部64と光束制御部材45の高さ規制ボス57によって基板42上に固定できるため、参考例4に係る発光装置41よりもシート部材43を基板42に確実に固定できる。   In the light emitting device 41 according to the reference example 5, the sheet member 43 can be fixed on the substrate 42 by the flange portion 64 of the sleeve 46 and the height regulating boss 57 of the light flux controlling member 45. As a result, the sheet member 43 can be more securely fixed to the substrate 42.

また、参考例5に係る発光装置41は、参考例4に係る発光装置41と同様に、面光源装置及び表示装置の構成部分として使用することができる。   The light emitting device 41 according to the reference example 5 can be used as a constituent part of the surface light source device and the display device, similarly to the light emitting device 41 according to the reference example 4.

(参考例5の変形例)
なお、参考例5に係る発光装置41は、図30に示すように、シート部材43の係合穴52をスリーブ46のフランジ部64の外径よりも大きく形成し、スリーブ46のフランジ部64と基板押さえ爪67とで基板42を挟持するように変形してもよい。
(Modification of Reference Example 5)
In the light emitting device 41 according to Reference Example 5, as shown in FIG. 30, the engagement hole 52 of the sheet member 43 is formed larger than the outer diameter of the flange portion 64 of the sleeve 46, You may deform | transform so that the board | substrate 42 may be clamped with the board | substrate holding nail | claw 67. FIG.

このように参考例5を変形した発光装置41は、参考例4に係る発光装置41と同様の効果を得ることができる。   Thus, the light emitting device 41 modified from the reference example 5 can obtain the same effect as the light emitting device 41 according to the reference example 4.

また、参考例5を変形した発光装置41は、参考例5に係る発光装置41と同様に、面光源装置及び表示装置の構成部分として使用することができる。   Further, the light emitting device 41 obtained by modifying the reference example 5 can be used as a constituent part of the surface light source device and the display device, similarly to the light emitting device 41 according to the reference example 5.

本発明に係る面光源装置は、テレビモニタやパーソナルコンピュータのモニタのバックライトなどの用途に広く使用することができる。   The surface light source device according to the present invention can be widely used for applications such as backlights for television monitors and personal computer monitors.

1……表示装置、2……面光源装置、3……発光装置、4……被照明部材、5……基板、6……発光素子、7……光束制御部材、8……裏面、10……シート部材、11……光拡散部材、15……支持脚、16……開口部、17……係合穴、26……切り込み部   DESCRIPTION OF SYMBOLS 1 ... Display apparatus, 2 ... Surface light source device, 3 ... Light-emitting device, 4 ... Illuminated member, 5 ... Board | substrate, 6 ... Light-emitting element, 7 ... Light flux control member, 8 ... Back surface, 10 ...... Sheet member, 11 ... light diffusion member, 15 ... support leg, 16 ... opening, 17 ... engagement hole, 26 ... notch

Claims (6)

基板と、
前記基板に取り付けられて点状に発光する発光素子と、
前記基板とは異なる材料で形成され、前記発光素子からの光を取り込んで前記光を拡げて出射する光束制御部材と、
前記発光素子を取り囲み且つ前記光束制御部材の裏面に対向するように前記基板上に載置されたシート部材と、を備えた発光装置であって、
前記光束制御部材は、その裏面に複数の支持脚が突出形成され、
前記複数の支持脚のうちの少なくとも一つの支持脚である第1の支持脚が前記基板に固定され、前記複数の支持脚のうちの前記第1の支持脚以外の少なくとも一つの支持脚である第2の支持脚が前記シート部材に固定されるようになっており、
前記シート部材は、前記基板の線膨張係数と比較して前記光束制御部材の線膨張係数に近い線膨張係数の材料で形成され、前記第1の支持脚に係合する係合穴を有しており、
前記光束制御部材の前記第1の支持脚が前記シート部材の前記係合穴に係合されて前記基板に固定され、前記光束制御部材の前記第2の支持脚が前記シート部材に固定されることにより、前記光束制御部材が前記発光素子に対して位置決めされ、
前記光束制御部材の前記第1の支持脚が前記シート部材の前記係合穴に係合されて前記基板に固定され、且つ、前記光束制御部材の前記第2の支持脚が前記シート部材に固定された状態で、前記基板、前記シート部材及び前記光束制御部材が熱膨張すると、前記シート部材のうちの少なくとも前記第1の支持脚と前記第2の支持脚との間の部分が前記基板に対して変位する、
ことを特徴とする発光装置。
A substrate,
A light-emitting element that is attached to the substrate and emits light in a dot shape;
A light flux controlling member that is formed of a material different from that of the substrate, takes in light from the light emitting element, and spreads and emits the light;
A sheet member that surrounds the light emitting element and is placed on the substrate so as to face the back surface of the light flux controlling member,
The light flux controlling member has a plurality of support legs protruding from the back surface thereof,
A first support leg that is at least one support leg of the plurality of support legs is fixed to the substrate, and is at least one support leg other than the first support leg of the plurality of support legs. A second support leg is fixed to the seat member;
The sheet member is formed of a material having a linear expansion coefficient close to the linear expansion coefficient of the light flux controlling member as compared with the linear expansion coefficient of the substrate, and has an engagement hole that engages with the first support leg. And
The first support leg of the light beam control member is engaged with the engagement hole of the sheet member and fixed to the substrate, and the second support leg of the light beam control member is fixed to the sheet member. Thus, the light flux controlling member is positioned with respect to the light emitting element,
The first support leg of the light beam control member is engaged with the engagement hole of the sheet member and fixed to the substrate, and the second support leg of the light beam control member is fixed to the sheet member. In this state, when the substrate, the sheet member, and the light flux controlling member are thermally expanded, at least a portion of the sheet member between the first support leg and the second support leg becomes the substrate. To displace,
A light emitting device characterized by that.
基板と、
前記基板に取り付けられて点状に発光する発光素子と、
前記基板とは異なる材料で形成され、前記発光素子からの光を取り込んで前記光を拡げて出射する光束制御部材と、
前記発光素子を取り囲み且つ前記光束制御部材の裏面に対向するように前記基板上に保持されたシート部材と、を備えた発光装置であって、
前記光束制御部材は、その裏面に複数の支持脚が突出形成され、
前記シート部材は、前記基板の線膨張係数と比較して前記光束制御部材の線膨張係数に近い線膨張係数の材料で形成され、
前記光束制御部材の前記複数の支持脚が前記シート部材上に固定されることにより、前記光束制御部材が前記発光素子に対して位置決めされ、
前記光束制御部材の前記複数の支持脚が前記シート部材に固定された状態で、前記基板、前記シート部材及び前記光束制御部材が熱膨張すると、前記シート部材のうちの少なくとも前記複数の支持脚の間の部分が前記基板に対して変位する、
ことを特徴とする発光装置。
A substrate,
A light-emitting element that is attached to the substrate and emits light in a dot shape;
A light flux controlling member that is formed of a material different from that of the substrate, takes in light from the light emitting element, and spreads and emits the light;
A sheet member that surrounds the light emitting element and is held on the substrate so as to face the back surface of the light flux controlling member,
The light flux controlling member has a plurality of support legs protruding from the back surface thereof,
The sheet member is formed of a material having a linear expansion coefficient close to the linear expansion coefficient of the light flux controlling member as compared with the linear expansion coefficient of the substrate,
The plurality of support legs of the light flux controlling member are fixed on the sheet member, whereby the light flux controlling member is positioned with respect to the light emitting element,
When the substrate, the sheet member, and the light beam control member are thermally expanded in a state where the plurality of support legs of the light beam control member are fixed to the sheet member, at least of the plurality of support legs of the sheet member. The portion in between is displaced relative to the substrate,
A light emitting device characterized by that.
前記シート部材は、少なくとも前記第1の支持脚と前記第2の支持脚との間の部分に切り込み部が形成され、前記基板、前記シート部材及び前記光束制御部材が熱膨張すると、前記切り込み部が開口する、
ことを特徴とする請求項1に記載の発光装置。
The sheet member is formed with a cut portion at least in a portion between the first support leg and the second support leg, and the cut portion is formed when the substrate, the sheet member, and the light flux controlling member are thermally expanded. Open,
The light-emitting device according to claim 1.
前記シート部材は、前記複数の支持脚のうちの少なくとも隣り合う一組の支持脚の間の部分に切り込み部が形成され、前記基板、前記シート部材及び前記光束制御部材が熱膨張すると、前記切り込み部が開口する、
ことを特徴とする請求項2に記載の発光装置。
The sheet member has a notch formed at a portion between at least one pair of adjacent support legs of the plurality of support legs, and the notch is thermally expanded when the substrate, the sheet member, and the light flux controlling member are thermally expanded. Part opens,
The light-emitting device according to claim 2.
前記基板の表面には、前記発光素子が複数隣接配置された前記請求項1乃至4のいずれか一項に記載の発光装置と、
前記発光装置からの光が拡散透過される光拡散部材と、
を備えたことを特徴とする面光源装置。
The light emitting device according to any one of claims 1 to 4, wherein a plurality of the light emitting elements are arranged adjacent to each other on a surface of the substrate.
A light diffusing member through which light from the light emitting device is diffused and transmitted;
A surface light source device comprising:
前記請求項4に記載の面光源装置と、
前記面光源装置からの光が照射される被照明部材と、
を備えたことを特徴とする表示装置。
The surface light source device according to claim 4,
An illuminated member to which light from the surface light source device is irradiated;
A display device comprising:
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