JP7397356B2 - light emitting module - Google Patents

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JP7397356B2
JP7397356B2 JP2021207260A JP2021207260A JP7397356B2 JP 7397356 B2 JP7397356 B2 JP 7397356B2 JP 2021207260 A JP2021207260 A JP 2021207260A JP 2021207260 A JP2021207260 A JP 2021207260A JP 7397356 B2 JP7397356 B2 JP 7397356B2
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light
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恵滋 榎村
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Nichia Corp
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Nichia Corp
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Description

本発明に係る実施形態は、発光モジュールに関する。 Embodiments according to the present invention relate to a light emitting module.

特許文献１には、発光モジュールが開示されている。発光モジュールは、光源と、光源からの光が導光する導光板と、を備えている。導光板に入射した光は、導光板に導光された後、導光板の一面から出射する。 Patent Document 1 discloses a light emitting module. The light emitting module includes a light source and a light guide plate that guides light from the light source. The light incident on the light guide plate is guided by the light guide plate and then exits from one surface of the light guide plate.

特開２０１８－１０１５２１号公報JP 2018-101521 Publication

本発明に係る実施形態は、発光面における輝度むらを軽減できる発光モジュールを提供することを目的とする。 Embodiments of the present invention aim to provide a light emitting module that can reduce uneven brightness on a light emitting surface.

本発明の一形態に係る発光モジュールは、第１上面と、前記第１上面の反対側に位置する第１下面と、前記第１上面から前記第１下面まで貫通する第１貫通孔と、を有する第１導光部材と、前記第１貫通孔内に配置される第１光源部と、前記第１貫通孔内において前記第１貫通孔と前記第１光源部との間に位置する第１外周部を有する第１透光性部材と、を備え、平面視において、前記第１光源部の中心と、前記第１導光部材の外縁のうちで前記第１光源部から最も遠い第１点と、を結ぶ第１直線を通る断面における前記第１外周部の最小厚みは、前記第１光源部の中心と、前記第１導光部材の外縁のうちで前記第１光源部から最も近い第２点と、を結ぶ第２直線を通る断面における前記第１外周部の最小厚みよりも厚い。 A light emitting module according to one embodiment of the present invention includes a first upper surface, a first lower surface located on the opposite side of the first upper surface, and a first through hole penetrating from the first upper surface to the first lower surface. a first light guide member having a first light guide member, a first light source section disposed within the first through hole, and a first light source section located between the first through hole and the first light source section within the first through hole. a first light-transmitting member having an outer periphery, and a first point farthest from the first light source between the center of the first light source and the outer edge of the first light guide member in plan view. The minimum thickness of the first outer peripheral part in a cross section passing through the first straight line connecting It is thicker than the minimum thickness of the first outer peripheral portion in a cross section passing through a second straight line connecting two points.

本発明の一実施形態の発光モジュールによれば、発光面における輝度むらを軽減できる。 According to the light emitting module of one embodiment of the present invention, uneven brightness on the light emitting surface can be reduced.

実施形態に係る面状光源の模式平面図である。FIG. 2 is a schematic plan view of a planar light source according to an embodiment. 実施形態に係る第１発光モジュールの模式平面図である。FIG. 2 is a schematic plan view of a first light emitting module according to an embodiment. 図２のIII-III線における模式断面図である。FIG. 3 is a schematic cross-sectional view taken along line III-III in FIG. 2. FIG. 実施形態に係る第１光源部の模式断面図である。It is a schematic cross-sectional view of the 1st light source part concerning an embodiment. 実施形態に係る１つの第１発光モジュールの模式平面図である。It is a schematic plan view of one 1st light emitting module concerning an embodiment. 図５のVIA-VIA線における模式断面図である。6 is a schematic cross-sectional view taken along the line VIA-VIA in FIG. 5. FIG. 図５のVIB-VIB線における模式断面図である。6 is a schematic cross-sectional view taken along the VIB-VIB line in FIG. 5. FIG. 実施形態に係る第２発光モジュールの模式断面図である。It is a schematic sectional view of the 2nd light emitting module concerning an embodiment. 実施形態に係る面状光源の外周領域及び中央領域の一部の模式平面図である。FIG. 2 is a schematic plan view of part of the outer peripheral region and central region of the planar light source according to the embodiment. 図８のIXA-IXA線における模式断面図である。9 is a schematic cross-sectional view taken along the line IXA-IXA in FIG. 8. FIG. 図８のIXB-IXB線における模式断面図である。9 is a schematic cross-sectional view taken along the line IXB-IXB in FIG. 8. FIG. 実施形態に係る面状光源の外周領域及び中央領域の他の一部の模式平面図である。FIG. 7 is a schematic plan view of another part of the outer peripheral region and the central region of the planar light source according to the embodiment. 図１０のXI-XI線における模式断面図である。11 is a schematic cross-sectional view taken along the line XI-XI in FIG. 10. FIG. 実施形態に係る第１貫通孔の変形例の模式平面図である。It is a schematic plan view of the modification of the 1st through-hole based on embodiment. 実施形態に係る第１貫通孔の他の変形例の模式平面図である。FIG. 7 is a schematic plan view of another modification of the first through hole according to the embodiment. 実施形態に係る第１貫通孔の他の変形例の模式平面図である。FIG. 7 is a schematic plan view of another modification of the first through hole according to the embodiment. 実施形態に係る第１発光モジュールの変形例の模式平面図である。It is a schematic plan view of the modification of the 1st light emitting module based on embodiment. 実施形態に係る第１発光モジュールの他の変形例の模式平面図である。It is a schematic plan view of another modification of the 1st light emitting module based on embodiment.

以下、図面を参照し、実施形態について説明する。各図面は、実施形態を模式的に示したものであるため、各部材のスケール、間隔又は位置関係等について、誇張又は部材の一部の図示が省略されている場合がある。また、断面図として、切断面のみを示す端面図を示す場合がある。 Hereinafter, embodiments will be described with reference to the drawings. Since each drawing schematically shows an embodiment, the scale, spacing, positional relationship, etc. of each member may be exaggerated or illustration of a part of the member may be omitted. Moreover, as a sectional view, an end view showing only a cut surface may be shown.

以下の説明において、実質的に同じ機能を有する構成要素は共通の参照符号で示し、説明を省略することがある。また、特定の方向又は位置を示す用語（例えば、「上」、「下」及びそれらの用語を含む別の用語）を用いる場合がある。しかしながら、それらの用語は、参照した図面における相対的な方向又は位置を分かり易さのために用いているに過ぎない。参照した図面における「上」、「下」等の用語による相対的な方向又は位置の関係が同一であれば、本開示以外の図面、実際の製品等において、参照した図面と同一の配置でなくてもよい。本明細書において「上」と表現する位置関係は、接している場合と、接していないが上方に位置している場合も含む。 In the following description, components having substantially the same functions are indicated by common reference numerals, and the description thereof may be omitted. In addition, terms indicating a specific direction or position (eg, "above", "below", and other terms including those terms) may be used. However, these terms are used only for clarity of relative orientation or position in the referenced drawings. If the relative directions or positional relationships using terms such as "upper" and "lower" in the referenced drawings are the same, the arrangement may not be the same in drawings other than this disclosure, actual products, etc. as in the referenced drawings. You can. In this specification, the positional relationship expressed as "above" includes cases in which they are in contact with each other, and cases in which they are not in contact with each other but are located above.

本明細書において「平行」とは、２つの直線、辺、面等が延長しても交わらない場合だけでなく、２つの直線、辺、面等がなす角度が１０°以内の範囲で交わる場合も含む。 In this specification, "parallel" refers not only to cases in which two straight lines, sides, planes, etc. do not intersect even if extended, but also to cases in which two lines, sides, planes, etc. intersect within an angle of 10°. Also included.

［実施形態］
実施形態の面状光源１０００を図１から図１１を参照して説明する。面状光源１０００の発光面に対して平行であり、かつ互いに直交する２つの方向を、「第１方向」と「第２方向」とする。第１方向及び第２方向と直交する方向を「第３方向」とする。図１において、第１方向とはＸ方向であり、第２方向とはＹ方向であり、第３方向とはＺ方向である。 [Embodiment]
A planar light source 1000 according to an embodiment will be described with reference to FIGS. 1 to 11. Two directions that are parallel to the light emitting surface of the planar light source 1000 and orthogonal to each other are referred to as a "first direction" and a "second direction." A direction perpendicular to the first direction and the second direction is referred to as a "third direction." In FIG. 1, the first direction is the X direction, the second direction is the Y direction, and the third direction is the Z direction.

面状光源１０００は、複数の第１発光モジュール１００と、複数の第２発光モジュール２００と、支持部材３００と、を備える。第１発光モジュール１００及び第２発光モジュール２００は、支持部材３００上に配置される。第１発光モジュール１００は、図１に示すように、面状光源１０００の平面視において、中央領域Ｒ１に配置される。第２発光モジュール２００は、中央領域Ｒ１を囲む外周領域Ｒ２に配置される。本明細書において、第１発光モジュール１００及び／又は第２発光モジュール２００を「発光モジュール」と称することがある。 The planar light source 1000 includes a plurality of first light emitting modules 100, a plurality of second light emitting modules 200, and a support member 300. The first light emitting module 100 and the second light emitting module 200 are arranged on the support member 300. As shown in FIG. 1, the first light emitting module 100 is arranged in the central region R1 when the planar light source 1000 is viewed from above. The second light emitting module 200 is arranged in an outer peripheral region R2 surrounding the central region R1. In this specification, the first light emitting module 100 and/or the second light emitting module 200 may be referred to as a "light emitting module".

第１発光モジュール１００は、図２に示すように、第１導光部材１１と、第１光源部１２と、第１透光性部材１３と、を備える。第１導光部材１１は、図３に示すように、上面（「第１上面１１１」という場合がある）と、第１上面１１１の反対側に位置する下面（「第１下面１１２」という場合がある）と、第１上面１１１から第１下面１１２まで貫通する第１貫通孔１１５と、を備える。第１光源部１２は、第１貫通孔１１５内に配置される。第１透光性部材１３は、第１外周部１３１を備える。第１外周部１３１は、第１貫通孔１１５内において、第１貫通孔１１５と第１光源部１２との間に位置する。 As shown in FIG. 2, the first light emitting module 100 includes a first light guide member 11, a first light source section 12, and a first translucent member 13. As shown in FIG. 3, the first light guide member 11 has an upper surface (sometimes referred to as a "first upper surface 111") and a lower surface located on the opposite side of the first upper surface 111 (sometimes referred to as a "first lower surface 112"). ) and a first through hole 115 penetrating from the first upper surface 111 to the first lower surface 112. The first light source section 12 is arranged within the first through hole 115. The first translucent member 13 includes a first outer peripheral portion 131 . The first outer peripheral portion 131 is located within the first through hole 115 and between the first through hole 115 and the first light source section 12 .

図５に示すように、第１発光モジュール１００の平面視において、第１導光部材１１の外縁のうちで第１光源部１２から最も遠い点を「第１点Ｐ１」とし、第１導光部材１１の外縁のうちで第１光源部１２から最も近い点を「第２点Ｐ２」とする。第１光源部１２の中心と第１点Ｐ１とを結ぶ直線を「第１直線Ｄ１」とする。本明細書でいう「第１光源部１２の中心」とは、平面視における第１光源部１２の幾何学的な重心を意味する。第１光源部１２の中心と第２点Ｐ２とを結ぶ直線を「第２直線Ｄ２」とする。図６Ａ、図６Ｂに示すように、第１直線Ｄ１を通る断面における第１外周部１３１の最小厚みＴ１は、第２直線Ｄ２を通る断面における第１外周部１３１の最小厚みＴ２よりも厚い。本明細書において、直線を通る断面における各部の最小厚みとは、断り書きがない限り、直線を通りＺ方向に平行な断面において、各部の上面から各部の下面までのＺ方向における最小の長さとする。例えば、第１直線Ｄ１を通る断面における第１外周部１３１の最小厚みＴ１とは、第１直線Ｄ１を通りＺ方向に平行な断面において、第１外周部１３１の上面から第１外周部１３１の下面までのＺ方向における最小の長さとする。 As shown in FIG. 5, in a plan view of the first light emitting module 100, the point farthest from the first light source section 12 on the outer edge of the first light guide member 11 is defined as a "first point P1", and the first light guide The point closest to the first light source section 12 on the outer edge of the member 11 is defined as a "second point P2." A straight line connecting the center of the first light source section 12 and the first point P1 is referred to as a "first straight line D1." The term "center of the first light source section 12" as used herein means the geometric center of gravity of the first light source section 12 in plan view. A straight line connecting the center of the first light source section 12 and the second point P2 is referred to as a "second straight line D2." As shown in FIGS. 6A and 6B, the minimum thickness T1 of the first outer circumferential portion 131 in the cross section passing through the first straight line D1 is thicker than the minimum thickness T2 of the first outer circumferential portion 131 in the cross section passing through the second straight line D2. In this specification, the minimum thickness of each part in a cross section passing through a straight line means the minimum length in the Z direction from the top surface of each part to the bottom surface of each part in a cross section passing through a straight line parallel to the Z direction. do. For example, the minimum thickness T1 of the first outer circumferential portion 131 in a cross section passing through the first straight line D1 is defined as the minimum thickness T1 of the first outer circumferential portion 131 from the upper surface of the first outer circumferential portion 131 in a cross section passing through the first straight line D1 and parallel to the Z direction. This is the minimum length in the Z direction to the bottom surface.

第１発光モジュール１００において、第１直線Ｄ１を通る断面における第１外周部１３１の最小厚みＴ１が、第２直線Ｄ２を通る断面における第１外周部１３１の最小厚みＴ２よりも厚いことにより、第１直線Ｄ１に沿う方向に第１外周部１３１を通る光の量が、第２直線Ｄ２に沿う方向に第１外周部１３１を通る光の量よりも多くなる。第１光源部１２から遠い第１点Ｐ１は、第１光源部１２に近い第２点Ｐ２よりも輝度が低くなりやすいが、第１直線Ｄ１に沿う方向に第１外周部１３１を通る光の量が多くなることで第１点Ｐ１の輝度が向上する。これにより、第１点Ｐ１での輝度と第２点Ｐ２での輝度とに差が生じるのを抑制できる。この結果、発光モジュールの発光面の輝度むらを軽減できる。 In the first light emitting module 100, the minimum thickness T1 of the first outer peripheral part 131 in the cross section passing through the first straight line D1 is thicker than the minimum thickness T2 of the first outer peripheral part 131 in the cross section passing through the second straight line D2. The amount of light passing through the first outer circumferential portion 131 in the direction along one straight line D1 is greater than the amount of light passing through the first outer circumferential portion 131 in the direction along the second straight line D2. The first point P1 that is far from the first light source section 12 tends to have lower luminance than the second point P2 that is closer to the first light source section 12. As the amount increases, the brightness of the first point P1 improves. Thereby, it is possible to suppress a difference between the brightness at the first point P1 and the brightness at the second point P2. As a result, uneven brightness on the light emitting surface of the light emitting module can be reduced.

以下、面状光源１０００を構成する各要素について詳しく説明する。 Each element constituting the planar light source 1000 will be described in detail below.

（第１発光モジュール１００）
第１発光モジュール１００は、図１に示すように、面状光源１０００の平面視において、中央領域Ｒ１に配置される。中央領域Ｒ１の外縁は平面視で四角形である。第１発光モジュール１００は、中央領域Ｒ１において、１つでもよく、複数でもよい。各第１発光モジュール１００は、図３に示すように、第１導光部材１１と、第１光源部１２と、第１透光性部材１３と、を備える。各第１発光モジュール１００は、さらに、第１接着部材１４と、第１光反射性部材１５と、第２接着部材１６と、第２光反射性部材１７と、第３光反射性部材１８と、を備える。 (First light emitting module 100)
As shown in FIG. 1, the first light emitting module 100 is arranged in the central region R1 when the planar light source 1000 is viewed from above. The outer edge of the central region R1 is quadrangular in plan view. The first light emitting module 100 may be one or more than one in the central region R1. As shown in FIG. 3, each first light emitting module 100 includes a first light guide member 11, a first light source section 12, and a first translucent member 13. Each first light emitting module 100 further includes a first adhesive member 14 , a first light reflective member 15 , a second adhesive member 16 , a second light reflective member 17 , and a third light reflective member 18 . , is provided.

（第１光源部１２）
第１光源部１２は、第１発光モジュール１００における光源である。第１光源部１２は、図４に示すように、発光素子１２１と、透光性部材１２２（以下、光源透光性部材という）と、光調整部材１２３と、被覆部材１２４と、を備える。第１光源部１２は、１つの第１発光モジュール１００に対して、１つでもよく、複数でもよい。 (First light source section 12)
The first light source section 12 is a light source in the first light emitting module 100. As shown in FIG. 4, the first light source section 12 includes a light emitting element 121, a light transmitting member 122 (hereinafter referred to as a light source transmitting member), a light adjusting member 123, and a covering member 124. One or more first light source units 12 may be provided for one first light emitting module 100.

発光素子１２１は、半導体積層体を含む。半導体積層体は、ｎ型半導体層及びｐ型半導体層と、これらに挟まれた発光層とを含む。発光層は、ダブルヘテロ接合又は単一量子井戸(ＳＱＷ)等の構造を有していてもよいし、多重量子井戸(ＭＱＷ)のようにひとかたまりの活性層群をもつ構造を有していてもよい。半導体積層体は、可視光または紫外光を発光可能に構成されている。このような発光層を含む半導体積層体は、例えばＩｎxＡｌyＧａ1-x-yＮ（０≦ｘ、０≦ｙ、ｘ＋ｙ≦１）を含むことができる。 The light emitting element 121 includes a semiconductor stack. The semiconductor stack includes an n-type semiconductor layer, a p-type semiconductor layer, and a light emitting layer sandwiched therebetween. The light emitting layer may have a structure such as a double heterojunction or a single quantum well (SQW), or may have a structure including a group of active layers such as a multiple quantum well (MQW). good. The semiconductor stack is configured to be able to emit visible light or ultraviolet light. A semiconductor stack including such a light emitting layer can include, for example, In x Al y Ga 1-xy N (0≦x, 0≦y, x+y≦1).

半導体積層体は、ｎ型半導体層とｐ型半導体層との間に１つ以上の発光層を含む構造を有していてもよいし、ｎ型半導体層と発光層とｐ型半導体層とを順に含む構造が複数回繰り返された構造を有していてもよい。半導体積層体が複数の発光層を含む場合、発光ピーク波長が異なる発光層を含んでいてもよいし、発光ピーク波長が同じ発光層を含んでいてもよい。なお、発光ピーク波長が同じとは、数ｎｍ程度のばらつきがある場合も含む。複数の発光層の間の発光ピーク波長の組み合わせは、適宜選択することができる。例えば半導体積層体が２つの発光層を含む場合、青色光と青色光、緑色光と緑色光、赤色光と赤色光、紫外光と紫外光、青色光と緑色光、青色光と赤色光、または、緑色光と赤色光などの組み合わせで発光層を選択することができる。各発光層は、発光ピーク波長が異なる複数の活性層を含んでいてもよいし、発光ピーク波長が同じ複数の活性層を含んでいてもよい。 The semiconductor stack may have a structure including one or more light-emitting layers between an n-type semiconductor layer and a p-type semiconductor layer, or may have a structure including one or more light-emitting layers between an n-type semiconductor layer, a light-emitting layer, and a p-type semiconductor layer. It may have a structure in which the structures included in this order are repeated multiple times. When the semiconductor laminate includes a plurality of light-emitting layers, it may contain light-emitting layers with different light-emitting peak wavelengths, or may contain light-emitting layers with the same light-emitting peak wavelength. Note that the expression that the emission peak wavelengths are the same includes cases where there is a variation of several nanometers. The combination of emission peak wavelengths between the plurality of light emitting layers can be selected as appropriate. For example, if the semiconductor stack includes two light emitting layers, blue light and blue light, green light and green light, red light and red light, ultraviolet light and ultraviolet light, blue light and green light, blue light and red light, or , the light-emitting layer can be selected by a combination of green light and red light, etc. Each light-emitting layer may include a plurality of active layers having different emission peak wavelengths, or may include a plurality of active layers having the same emission peak wavelength.

発光素子１２１は複数の電極１２１１を含む。複数の電極１２１１は、ｎ型半導体層と電気的に接続されるｎ側電極と、ｐ型半導体層と電気的に接続されるｐ側電極と、を含む。複数の電極１２１１の下面は、第１光源部１２の下面の一部を構成する。 The light emitting element 121 includes a plurality of electrodes 1211. The plurality of electrodes 1211 include an n-side electrode electrically connected to the n-type semiconductor layer and a p-side electrode electrically connected to the p-type semiconductor layer. The lower surface of the plurality of electrodes 1211 constitutes a part of the lower surface of the first light source section 12 .

光源透光性部材１２２は、発光素子１２１の上面及び側面を覆っている。光源透光性部材１２２は、発光素子１２１を保護する。光源透光性部材１２２は、光源透光性部材１２２に添加される粒子に応じて、発光素子１２１から放射された光の波長変換や光拡散等の機能を備える。 The light source transparent member 122 covers the top and side surfaces of the light emitting element 121. The light source transparent member 122 protects the light emitting element 121. The light source transparent member 122 has functions such as wavelength conversion and light diffusion of the light emitted from the light emitting element 121, depending on the particles added to the light source transparent member 122.

例えば、光源透光性部材１２２は、透光性樹脂を含む。光源透光性部材１２２は、蛍光体を更に含んでいてもよい。透光性樹脂としては、例えば、シリコーン樹脂、又はエポキシ樹脂等が挙げられる。また、蛍光体としては、イットリウム・アルミニウム・ガーネット系蛍光体（例えば、Ｙ３（Ａｌ，Ｇａ）５Ｏ１２：Ｃｅ）、ルテチウム・アルミニウム・ガーネット系蛍光体（例えば、Ｌｕ３（Ａｌ，Ｇａ）５Ｏ１２：Ｃｅ）、テルビウム・アルミニウム・ガーネット系蛍光体（例えば、Ｔｂ３（Ａｌ，Ｇａ）５Ｏ１２：Ｃｅ）、ＣＣＡ系蛍光体（例えば、Ｃａ１０（ＰＯ４）６Ｃｌ２：Ｅｕ）、ＳＡＥ系蛍光体（例えば、Ｓｒ４Ａｌ１４Ｏ２５：Ｅｕ）、クロロシリケート系蛍光体（例えば、Ｃａ８ＭｇＳｉ４Ｏ１６Ｃｌ２：Ｅｕ）、βサイアロン系蛍光体（例えば、（Ｓｉ，Ａｌ）３（Ｏ，Ｎ）４：Ｅｕ）若しくはαサイアロン系蛍光体（例えば、Ｃａ（Ｓｉ，Ａｌ）１２（Ｏ，Ｎ）１６：Ｅｕ）等の酸窒化物系蛍光体、ＳＬＡ系蛍光体（例えば、ＳｒＬｉＡｌ３Ｎ４：Ｅｕ）、ＣＡＳＮ系蛍光体（例えば、ＣａＡｌＳｉＮ３：Ｅｕ）若しくはＳＣＡＳＮ系蛍光体（例えば、（Ｓｒ，Ｃａ）ＡｌＳｉＮ３：Ｅｕ）等の窒化物系蛍光体、ＫＳＦ系蛍光体（例えば、Ｋ２ＳｉＦ６：Ｍｎ）、ＫＳＡＦ系蛍光体（例えば、Ｋ２Ｓｉ０．９９Ａｌ０．０１Ｆ５．９９：Ｍｎ）若しくはＭＧＦ系蛍光体（例えば、３．５ＭｇＯ・０．５ＭｇＦ２・ＧｅＯ２：Ｍｎ）等のフッ化物系蛍光体、ペロブスカイト構造を有する蛍光体（例えば、ＣｓＰｂ（Ｆ，Ｃｌ，Ｂｒ，Ｉ）３）、又は量子ドット蛍光体（例えば、ＣｄＳｅ、ＩｎＰ、ＡｇＩｎＳ２又はＡｇＩｎＳｅ２）等が挙げられる。光源透光性部材１２２に添加する蛍光体としては、１種類の蛍光体が用いられてもよいし、複数種類の蛍光体が用いられてもよい。 For example, the light source transparent member 122 includes a transparent resin. The light source transparent member 122 may further contain a phosphor. Examples of the translucent resin include silicone resin and epoxy resin. In addition, examples of the phosphor include yttrium-aluminum-garnet-based phosphor (e.g., Y 3 (Al, Ga) 5 O 12 :Ce), lutetium-aluminum-garnet-based phosphor (e.g., Lu 3 (Al, Ga)). 5 O 12 :Ce), terbium-aluminum-garnet-based phosphor (e.g., Tb 3 (Al, Ga) 5 O 12 :Ce), CCA-based phosphor (e.g., Ca 10 (PO 4 ) 6 Cl 2 :Eu) ), SAE-based phosphors (e.g., Sr 4 Al 14 O 25 :Eu), chlorosilicate-based phosphors (e.g., Ca 8 MgSi 4 O 16 Cl 2 :Eu), β-sialon-based phosphors (e.g., (Si, Oxynitride-based phosphors such as Al) 3 (O,N) 4 :Eu) or α-sialon-based phosphors (e.g., Ca(Si,Al) 12 (O,N) 16 :Eu), SLA-based phosphors (e.g., SrLiAl 3 N 4 :Eu), CASN-based phosphor (e.g., CaAlSiN 3 :Eu), or SCASN-based phosphor (e.g., (Sr,Ca)AlSiN 3 :Eu), etc., nitride-based phosphor, KSF type phosphor (e.g. K 2 SiF 6 :Mn), KSAF type phosphor (e.g. K 2 Si 0.99 Al 0.01 F 5.99 :Mn) or MGF type phosphor (e.g. 3.5MgO. Fluoride-based phosphors such as 0.5MgF 2 .GeO 2 :Mn), phosphors with a perovskite structure (e.g. CsPb(F,Cl,Br,I) 3 ), or quantum dot phosphors (e.g. CdSe, InP, AgInS 2 or AgInSe 2 ), and the like. As the phosphor added to the light source transparent member 122, one type of phosphor may be used, or multiple types of phosphor may be used.

ＫＳＡＦ系蛍光体としては、下記式（Ｉ）で表される組成を有していてよい。
Ｍ２［ＳｉｐＡｌｑＭｎｒＦｓ］ （Ｉ） The KSAF-based phosphor may have a composition represented by the following formula (I).
M 2 [Si p Al q Mn r F s ] (I)

式（Ｉ）中、Ｍはアルカリ金属を示し、少なくともＫを含んでよい。Ｍｎは４価のＭｎイオンであってよい。ｐ、ｑ、ｒ及びｓは、０．９≦ｐ＋ｑ＋ｒ≦１．１、０＜ｑ≦０．１、０＜ｒ≦０．２、５．９≦ｓ≦６．１を満たしていてよい。好ましくは、０．９５≦ｐ＋ｑ＋ｒ≦１．０５又は０．９７≦ｐ＋ｑ＋ｒ≦１．０３、０＜ｑ≦０．０３、０．００２≦ｑ≦０．０２又は０．００３≦ｑ≦０．０１５、０．００５≦ｒ≦０．１５、０．０１≦ｒ≦０．１２又は０．０１５≦ｒ≦０．１、５．９２≦ｓ≦６．０５又は５．９５≦ｓ≦６．０２５であってよい。例えば、Ｋ２［Ｓｉ０．９４６Ａｌ０．００５Ｍｎ０．０４９Ｆ５．９９５］、Ｋ２［Ｓｉ０．９４２Ａｌ０．００８Ｍｎ０．０５０Ｆ５．９９２］、Ｋ２［Ｓｉ０．９３９Ａｌ０．０１４Ｍｎ０．０４７Ｆ５．９８６］で表される組成が挙げられる。このようなＫＳＡＦ系蛍光体によれば、輝度が高く、発光ピーク波長の半値幅の狭い赤色発光を得ることができる。 In formula (I), M represents an alkali metal and may contain at least K. Mn may be a tetravalent Mn ion. p, q, r, and s may satisfy 0.9≦p+q+r≦1.1, 0<q≦0.1, 0<r≦0.2, and 5.9≦s≦6.1. Preferably, 0.95≦p+q+r≦1.05 or 0.97≦p+q+r≦1.03, 0<q≦0.03, 0.002≦q≦0.02 or 0.003≦q≦0.015. , 0.005≦r≦0.15, 0.01≦r≦0.12 or 0.015≦r≦0.1, 5.92≦s≦6.05 or 5.95≦s≦6.025 It may be. For example, K 2 [Si 0.946 Al 0.005 Mn 0.049 F 5.995 ], K 2 [Si 0.942 Al 0.008 Mn 0.050 F 5.992 ], K 2 [Si 0. 939 Al 0.014 Mn 0.047 F 5.986 ]. According to such a KSAF-based phosphor, it is possible to obtain red light emission with high brightness and a narrow half-width of the emission peak wavelength.

また、上述した蛍光体を含有する波長変換シートを、面状光源１０００上に配置してもよい。波長変換シートは、光源部からの青色光の一部を吸収して、黄色光、緑色光及び／又は赤色光を発し、白色光を出射する面状光源１０００とすることができる。例えば、青色の発光が可能な第１光源部１２と、黄色の発光が可能な蛍光体を含有する波長変換シートと、を組み合わせて白色光を得ることができる。また他には、青色の発光が可能な第１光源部１２と、赤色蛍光体及び緑色蛍光体を含有する波長変換シートとを組み合わせてもよい。また、青色の発光が可能な第１光源部１２と、複数の波長変換シートとを組み合わせてもよい。複数の波長変換シートとしては、例えば、赤色の発光が可能な蛍光体を含有する波長変換シートと、緑色の発光が可能な蛍光体を含有する波長変換シートと、を選択することができる。また、青色の発光が可能な発光素子１２１と赤色の発光が可能な蛍光体を含有する光源透光性部材１２２とを有する第１光源部１２と、緑色の発光が可能な蛍光体を含有する波長変換シートと、を組み合わせてもよい。 Further, a wavelength conversion sheet containing the above-mentioned phosphor may be placed on the planar light source 1000. The wavelength conversion sheet can be used as a planar light source 1000 that absorbs part of the blue light from the light source, emits yellow light, green light, and/or red light, and emits white light. For example, white light can be obtained by combining the first light source section 12 capable of emitting blue light and a wavelength conversion sheet containing a phosphor capable of emitting yellow light. Alternatively, the first light source section 12 capable of emitting blue light may be combined with a wavelength conversion sheet containing a red phosphor and a green phosphor. Furthermore, the first light source section 12 capable of emitting blue light may be combined with a plurality of wavelength conversion sheets. As the plurality of wavelength conversion sheets, for example, a wavelength conversion sheet containing a phosphor capable of emitting red light and a wavelength conversion sheet containing a phosphor capable of emitting green light can be selected. Further, the first light source section 12 includes a light emitting element 121 capable of emitting blue light, a light source transparent member 122 containing a phosphor capable of emitting red light, and a phosphor containing a phosphor capable of emitting green light. A wavelength conversion sheet may be used in combination.

波長変換シートに用いられる黄色の蛍光体としては、例えば、上述したイットリウム・アルミニウム・ガーネット系蛍光体を用いるのが好ましい。また、波長変換シートに用いられる緑色の蛍光体としては、発光ピーク波長の半値幅の狭い、例えば、上述したペロブスカイト構造を有する蛍光体又は量子ドット蛍光体を用いるのが好ましい。また、波長変換シートに用いられる赤色の蛍光体としては、緑色の蛍光体同様に発光ピーク波長の半値幅の狭い、例えば、上述したＫＳＦ系蛍光体、ＫＳＡＦ系蛍光体、又は量子ドット蛍光体を用いるのが好ましい。 As the yellow phosphor used in the wavelength conversion sheet, it is preferable to use, for example, the above-mentioned yttrium-aluminum-garnet-based phosphor. Further, as the green phosphor used in the wavelength conversion sheet, it is preferable to use a phosphor having a narrow half-value width of the emission peak wavelength, for example, a phosphor having the above-mentioned perovskite structure or a quantum dot phosphor. In addition, as the red phosphor used in the wavelength conversion sheet, similar to the green phosphor, the half-width of the emission peak wavelength is narrow, such as the above-mentioned KSF-based phosphor, KSAF-based phosphor, or quantum dot phosphor. It is preferable to use

被覆部材１２４は、発光素子１２１の下面に配置される。電極１２１１の下面は、被覆部材１２４から露出する。被覆部材１２４は、発光素子１２１の側面を覆う光源透光性部材１２２の下面にも配置される。 Covering member 124 is arranged on the lower surface of light emitting element 121 . The lower surface of the electrode 1211 is exposed from the covering member 124. The covering member 124 is also arranged on the lower surface of the light source transparent member 122 that covers the side surface of the light emitting element 121.

被覆部材１２４は、第１光源部１２が発する光に対する反射性を有する。被覆部材１２４は、例えば、光散乱粒子を含む樹脂部材である。被覆部材１２４の光散乱粒子としては、例えば、酸化チタン、二酸化ケイ素、酸化アルミニウム、酸化亜鉛、酸化マグネシウム、酸化ジルコニウム、酸化イットリウム、フッ化カルシウム、フッ化マグネシウム、五酸化ニオブ、チタン酸バリウム、五酸化タンタル、硫酸バリウム、又は、ガラス等の粒子が挙げられる。被覆部材１２４の樹脂材料としては、例えば、アクリル樹脂、ポリカーボネート樹脂、環状ポリオレフィン樹脂、ポリエチレンテレフタレート樹脂若しくはポリエステル樹脂等の熱可塑性樹脂、又は、エポキシ樹脂若しくはシリコーン樹脂等の熱硬化性樹脂が挙げられる。 The covering member 124 has reflectivity for the light emitted by the first light source section 12. The covering member 124 is, for example, a resin member containing light scattering particles. Examples of the light scattering particles of the coating member 124 include titanium oxide, silicon dioxide, aluminum oxide, zinc oxide, magnesium oxide, zirconium oxide, yttrium oxide, calcium fluoride, magnesium fluoride, niobium pentoxide, barium titanate, and Examples include particles of tantalum oxide, barium sulfate, or glass. Examples of the resin material for the covering member 124 include thermoplastic resins such as acrylic resin, polycarbonate resin, cyclic polyolefin resin, polyethylene terephthalate resin, or polyester resin, or thermosetting resins such as epoxy resin or silicone resin.

光調整部材１２３は、第１光源部１２の上面の少なくとも一部を構成する。光調整部材１２３は、発光素子１２１の上面を覆っている。光調整部材１２３は、光源透光性部材１２２の上面に配置され、光源透光性部材１２２の上面から出射する光の量や出射方向を制御する。光調整部材１２３は、発光素子１２１が発する光に対する反射性及び透光性を有する。光源透光性部材１２２の上面から出射した光の一部は光調整部材１２３に反射し、他の一部は光調整部材１２３を透過する。発光素子１２１のピーク波長に対する光調整部材１２３の透過率は、例えば、１％以上５０％以下が好ましく、３％以上３０％以下であることがより好ましい。これにより、第１光源部１２の直上での輝度を低くし、発光モジュールの輝度むらが軽減される。 The light adjustment member 123 constitutes at least a portion of the upper surface of the first light source section 12 . The light adjustment member 123 covers the upper surface of the light emitting element 121. The light adjustment member 123 is disposed on the upper surface of the light source transparent member 122 and controls the amount and direction of light emitted from the upper surface of the light source transparent member 122. The light adjusting member 123 has a reflective property and a translucent property for the light emitted by the light emitting element 121. Part of the light emitted from the upper surface of the light source transparent member 122 is reflected by the light adjustment member 123, and the other part is transmitted through the light adjustment member 123. The transmittance of the light adjusting member 123 with respect to the peak wavelength of the light emitting element 121 is, for example, preferably 1% or more and 50% or less, and more preferably 3% or more and 30% or less. Thereby, the brightness directly above the first light source section 12 is lowered, and uneven brightness of the light emitting module is reduced.

光調整部材１２３は、例えば、多数の気泡を含む樹脂部材や、光散乱粒子を含む樹脂部材を用いることができる。光調整部材１２３の樹脂は、例えば、上述の被覆部材１２４に用いることができる樹脂として列挙した樹脂から選択することができる。光調整部材１２３の光散乱粒子は、例えば、上述の被覆部材１２４に用いることができる光散乱粒子として列挙した光散乱粒子から選択することができる。光調整部材１２３は、例えば、アルミニウム若しくは銀などの金属部材、又は誘電体多層膜であってもよい。 For the light adjustment member 123, for example, a resin member containing many bubbles or a resin member containing light scattering particles can be used. The resin for the light adjustment member 123 can be selected from, for example, the resins listed as resins that can be used for the covering member 124 described above. The light scattering particles of the light adjusting member 123 can be selected from, for example, the light scattering particles listed as the light scattering particles that can be used for the covering member 124 described above. The light adjustment member 123 may be, for example, a metal member such as aluminum or silver, or a dielectric multilayer film.

他の形態としては、第１光源部１２は、光調整部材１２３を含まなくてもよい。例えば、光源透光性部材１２２の上面によって第１光源部１２の上面が構成されていてもよい。このようにすることで、第１光源部１２が発光素子１２１の上面を覆う光調整部材１２３を含む場合よりも、第３方向（Ｚ方向）において光源部２０を小型化しやすくなる。これにより、第３方向（Ｚ方向）において発光モジュールを小型化しやすくなる。他の形態としては、第１光源部１２は、被覆部材１２４を含まなくてもよい。例えば、発光素子１２１の下面及び光源透光性部材１２２の下面によって第１光源部１２の下面が構成されていてもよい。他の形態としては、第１光源部１２は発光素子１２１の単体のみであってもよい。また、他の形態としては、第１光源部１２は、被覆部材１２４及び光源透光性部材１２２を含まず、発光素子１２１の上面に光調整部材１２３が配置されてもよい。また、他の形態としては、第１光源部１２は、光源透光性部材１２２を含まず、発光素子１２１の上面に光調整部材１２３が配置され、発光素子１２１の下面に被覆部材１２４が配置されてもよい。 As another form, the first light source section 12 may not include the light adjustment member 123. For example, the upper surface of the first light source section 12 may be configured by the upper surface of the light source transparent member 122. By doing so, it becomes easier to downsize the light source section 20 in the third direction (Z direction) than when the first light source section 12 includes the light adjustment member 123 that covers the upper surface of the light emitting element 121. This makes it easier to downsize the light emitting module in the third direction (Z direction). As another form, the first light source section 12 may not include the covering member 124. For example, the lower surface of the first light source section 12 may be configured by the lower surface of the light emitting element 121 and the lower surface of the light source transparent member 122. As another form, the first light source section 12 may include only the light emitting element 121 alone. Alternatively, the first light source section 12 may not include the covering member 124 and the light source transparent member 122, and the light adjusting member 123 may be disposed on the upper surface of the light emitting element 121. In another embodiment, the first light source section 12 does not include the light source translucent member 122, the light adjusting member 123 is arranged on the upper surface of the light emitting element 121, and the covering member 124 is arranged on the lower surface of the light emitting element 121. may be done.

平面視における第１光源部１２の形状は特に制限はない。平面視における第１光源部１２の形状は、例えば、円形、三角形、四角形、六角形、又は八角形等の形状とすることができる。平面視における第１光源部１２の形状が四角形の場合、第１光源部１２の一対の外縁がＸ方向と平行でもよく、Ｘ方向に対して傾斜していてもよい。本実施形態では、第１光源部１２の一対の外縁がＸ方向に平行である。 The shape of the first light source section 12 in plan view is not particularly limited. The shape of the first light source section 12 in plan view can be, for example, circular, triangular, quadrangular, hexagonal, or octagonal. When the first light source section 12 has a rectangular shape in plan view, the pair of outer edges of the first light source section 12 may be parallel to the X direction or may be inclined with respect to the X direction. In this embodiment, a pair of outer edges of the first light source section 12 are parallel to the X direction.

（第１導光部材１１）
第１導光部材１１は、第１光源部１２が発した光が入射し、発光領域から出射する部材である。第１導光部材１１は、第１光源部１２が発する光に対する透光性を有する。第１光源部１２のピーク波長に対する第１導光部材１１の透過率は、例えば、６０％以上が好ましく、８０％以上がより好ましい。 (First light guide member 11)
The first light guide member 11 is a member into which light emitted by the first light source section 12 enters and exits from the light emitting region. The first light guide member 11 has translucency for the light emitted by the first light source section 12 . The transmittance of the first light guide member 11 with respect to the peak wavelength of the first light source section 12 is preferably 60% or more, and more preferably 80% or more, for example.

面状光源１０００が複数の発光モジュールを備える場合、各発光モジュールは区画溝１１Ａで区画される。平面視において、区画溝１１Ａで区画された１つの領域を発光領域とする。なお、本実施形態では、区画溝１１Ａによって区画された複数の第１発光モジュール１００が、それぞれ異なる発光領域を画定する。１つの発光領域は、例えば、ローカルディミングの駆動単位とすることができる。面状光源１０００を構成する発光領域の数は特に限定されない。例えば、面状光源１０００が１つの発光領域を備えていてもよく、面状光源１０００が複数の発光領域を備えていてもよい。また、複数の面状光源１０００を並べることで、より面積の大きい面状光源装置としてもよい。 When the planar light source 1000 includes a plurality of light emitting modules, each light emitting module is divided by a dividing groove 11A. In plan view, one area defined by the partition groove 11A is defined as a light emitting area. In addition, in this embodiment, the plurality of first light emitting modules 100 partitioned by the partition grooves 11A define different light emitting areas, respectively. One light emitting region can be, for example, a drive unit for local dimming. The number of light emitting regions that constitute planar light source 1000 is not particularly limited. For example, the planar light source 1000 may include one light emitting region, or the planar light source 1000 may include a plurality of light emitting regions. Further, by arranging a plurality of planar light sources 1000, a planar light source device with a larger area may be obtained.

図３に示すように、本実施形態では、区画溝１１Ａは、第１導光部材１１の第１上面１１１から第１下面１１２まで貫通する。このようにすることで、第１導光部材１１を複数に分離することができるので、例えば、第１導光部材１１と支持部材３００の熱膨張係数の違いから生じる支持部材３００の反りを抑制することができる。これにより、後述する第２導電部材３３に亀裂が生じるのを抑制することができる。区画溝１１Ａは、第１導光部材１１の第１上面１１１にのみ開口する凹部であってもよい、又は、区画溝１１Ａは、第１導光部材１１の第１下面１１２にのみ開口する凹部であってもよい。区画溝１１Ａが凹部の場合には、区画溝１１Ａは、第１導光部材１１により形成された底面を備えている。 As shown in FIG. 3, in this embodiment, the partition groove 11A penetrates from the first upper surface 111 to the first lower surface 112 of the first light guide member 11. By doing so, the first light guide member 11 can be separated into a plurality of parts, so that, for example, warping of the support member 300 caused by a difference in thermal expansion coefficient between the first light guide member 11 and the support member 300 can be suppressed. can do. Thereby, it is possible to suppress generation of cracks in the second conductive member 33, which will be described later. The partition groove 11A may be a recess that opens only to the first upper surface 111 of the first light guide member 11, or the partition groove 11A may be a recess that opens only to the first lower surface 112 of the first light guide member 11. It may be. When the dividing groove 11A is a concave portion, the dividing groove 11A has a bottom surface formed by the first light guide member 11.

第１導光部材１１の材料としては、例えば、アクリル、ポリカーボネート、環状ポリオレフィン、ポリエチレンテレフタレート若しくはポリエステル等の熱可塑性樹脂、エポキシ若しくはシリコーン等の熱硬化性樹脂、又はガラス等が挙げられる。 Examples of the material of the first light guide member 11 include acrylic, polycarbonate, cyclic polyolefin, thermoplastic resin such as polyethylene terephthalate or polyester, thermosetting resin such as epoxy or silicone, or glass.

第１導光部材１１の厚さは、例えば、１５０μｍ以上８００μｍ以下が好ましい。本明細書において、各部材の「厚さ」とは、断り書きがない限り、各部材の上面から各部材の下面までＺ方向における最大の長さとする。第１導光部材１１は、Ｚ方向に単層で構成されてもよいし、複数の層の積層体で構成されてもよい。第１導光部材１１が積層体で構成される場合、各層の間に透光性の接着剤を配置してもよい。積層体の各層は、異なる種類の主材を用いてもよい。接着剤の材料としては、例えば、アクリル、ポリカーボネート、環状ポリオレフィン、ポリエチレンテレフタレート若しくはポリエステル等の熱可塑性樹脂、又は、エポキシ若しくはシリコーン等の熱硬化性樹脂が挙げられる。 The thickness of the first light guide member 11 is preferably, for example, 150 μm or more and 800 μm or less. In this specification, the "thickness" of each member is the maximum length in the Z direction from the top surface of each member to the bottom surface of each member, unless otherwise specified. The first light guide member 11 may be composed of a single layer in the Z direction, or may be composed of a laminate of a plurality of layers. When the first light guide member 11 is composed of a laminate, a translucent adhesive may be placed between each layer. Each layer of the laminate may use a different type of base material. Examples of the adhesive material include thermoplastic resins such as acrylic, polycarbonate, cyclic polyolefin, polyethylene terephthalate, and polyester, and thermosetting resins such as epoxy and silicone.

図３に示すように、第１導光部材１１は、面状光源１０００の発光面を含む第１上面１１１と、第１上面１１１の反対側に位置する第１下面１１２と、を含む。第１導光部材１１は、第１上面１１１と第１下面１１２との間に位置する第１側面１１３を含む。本実施形態における第１導光部材１１は、第１側面１１３の一部から延びる延伸部１１４を含む。第１導光部材１１が延伸部１１４を備えることにより、延伸部１１４によって第１側面１１３の近傍における輝度の調整が容易になる。例えば、延伸部１１４が延びる方向や延伸部１１４の厚さ等を変更することにより輝度を調整できる。なお、第１導光部材１１は、延伸部１１４を備えなくてもよい。 As shown in FIG. 3, the first light guide member 11 includes a first upper surface 111 that includes the light emitting surface of the planar light source 1000, and a first lower surface 112 located on the opposite side of the first upper surface 111. The first light guiding member 11 includes a first side surface 113 located between a first upper surface 111 and a first lower surface 112. The first light guide member 11 in this embodiment includes an extension portion 114 extending from a part of the first side surface 113. Since the first light guide member 11 includes the extending portion 114, the brightness in the vicinity of the first side surface 113 can be easily adjusted by the extending portion 114. For example, the brightness can be adjusted by changing the direction in which the extending portion 114 extends, the thickness of the extending portion 114, and the like. Note that the first light guide member 11 does not need to include the extending portion 114.

第１導光部材１１は、第１光源部１２が配置される第１貫通孔１１５を含む。換言すると、第１光源部１２は、第１導光部材１１の第１貫通孔１１５内に配置される。第１貫通孔１１５は、第１導光部材１１の第１上面１１１から第１下面１１２まで貫通する。 The first light guide member 11 includes a first through hole 115 in which the first light source section 12 is disposed. In other words, the first light source section 12 is arranged within the first through hole 115 of the first light guide member 11 . The first through hole 115 penetrates from the first upper surface 111 to the first lower surface 112 of the first light guide member 11 .

図５に示すように、本実施形態では、第１貫通孔１１５の外縁は、曲率半径の異なる複数の円弧を含む。第１貫通孔１１５の外縁は、複数の円弧として、複数の第１円弧１１５１と、複数の第２円弧１１５２と、を含む。例えば、第１円弧１１５１の曲率半径は、０．７ｍｍ以上１．５μｍｍ以下である。例えば、第２円弧１１５２の曲率半径は、０．２ｍｍ以上１ｍｍ以下である。第１貫通孔１１５の外縁は、周方向に、第１円弧１１５１と第２円弧１１５２とが交互に接続されている。 As shown in FIG. 5, in this embodiment, the outer edge of the first through hole 115 includes a plurality of circular arcs with different radii of curvature. The outer edge of the first through hole 115 includes a plurality of first circular arcs 1151 and a plurality of second circular arcs 1152 as a plurality of circular arcs. For example, the radius of curvature of the first circular arc 1151 is greater than or equal to 0.7 mm and less than or equal to 1.5 μmm. For example, the radius of curvature of the second circular arc 1152 is 0.2 mm or more and 1 mm or less. At the outer edge of the first through hole 115, first circular arcs 1151 and second circular arcs 1152 are alternately connected in the circumferential direction.

複数の第１円弧１１５１の中心Ｃ１は、本実施形態では、全て同じ位置にある。各第１円弧１１５１の中心Ｃ１は、平面視において、第１光源部１２の中心と同じ位置にある。「第１光源部１２の中心と同じ位置」とは、第１光源部１２の中心に対して、厳密に一致する場合のほか、実質的に同じとみなされる場合も含む。「実質的に同じとみなされる場合」は、平面視において、第１光源部１２の中心と第１円弧１１５１の中心Ｃ１との間の距離が、Ｘ方向において、第１光源部１２のＸ方向の長さの２０％以内で、かつＹ方向において、第１光源部１２のＹ方向の長さの２０％以内である場合をいうこととする。 In this embodiment, the centers C1 of the plurality of first circular arcs 1151 are all located at the same position. The center C1 of each first circular arc 1151 is located at the same position as the center of the first light source section 12 in plan view. "The same position as the center of the first light source section 12" includes not only a case where the position exactly coincides with the center of the first light source section 12 but also a case where the position is considered to be substantially the same. "When they are considered to be substantially the same" means that the distance between the center of the first light source section 12 and the center C1 of the first circular arc 1151 in the X direction is This refers to a case where the length is within 20% of the length of the first light source section 12 in the Y direction, and within 20% of the length of the first light source section 12 in the Y direction.

上述したように、第１点Ｐ１は、第１導光部材１１の外縁のうちで第１光源部１２の中心から最も遠い点である。第２点Ｐ２は、第１導光部材１１の外縁のうちで第１光源部１２の中心から最も近い点である。本実施形態では、第１導光部材１１が正方形であって、平面視において、第１光源部１２の中心が、第１導光部材１１の中心（重心）と同じ位置にあるため、第１発光モジュール１００は、複数の第１点Ｐ１と、複数の第２点Ｐ２とを有する。本実施形態では、第１点Ｐ１は第１導光部材１１の角にある頂点に位置し、第２点Ｐ２は第１導光部材１１の各辺の中心に位置する。第１点Ｐ１及び第２点Ｐ２は、それぞれが、１つでもよいし、複数でもよい。 As described above, the first point P1 is the farthest point from the center of the first light source section 12 among the outer edges of the first light guide member 11. The second point P2 is a point on the outer edge of the first light guide member 11 that is closest to the center of the first light source section 12. In this embodiment, the first light guide member 11 is square, and the center of the first light source section 12 is located at the same position as the center (center of gravity) of the first light guide member 11 in plan view. The light emitting module 100 has a plurality of first points P1 and a plurality of second points P2. In this embodiment, the first point P1 is located at the corner vertex of the first light guide member 11, and the second point P2 is located at the center of each side of the first light guide member 11. Each of the first point P1 and the second point P2 may be one or more.

複数の第１円弧１１５１の少なくとも１つは、平面視において、第１光源部１２の中心と第１点Ｐ１とを結ぶ直線に交差する。本実施形態では、複数の第１円弧１１５１の全てが、第１光源部１２の中心と第１点Ｐ１とを結ぶ直線に交差する。すなわち、第１円弧１１５１は、第１直線Ｄ１に交差する。 At least one of the plurality of first circular arcs 1151 intersects a straight line connecting the center of the first light source section 12 and the first point P1 in plan view. In this embodiment, all of the plurality of first circular arcs 1151 intersect the straight line connecting the center of the first light source section 12 and the first point P1. That is, the first arc 1151 intersects the first straight line D1.

第２円弧１１５２の中心Ｃ２は、第１光源部１２の中心と第２点Ｐ２とを結ぶ直線上に位置する。本明細書でいう「線上に位置する」とは、線に対して、対象となる点（ここでは第２円弧１１５２の中心Ｃ２）が厳密に重なっている場合のほか、実質的に重なる場合も含む。「実質的に重なる場合」は、線から対象となる点までの最小距離が、直線に平行な方向における第１光源部１２の長さの２０％以内である場合をいうこととする。 The center C2 of the second arc 1152 is located on the straight line connecting the center of the first light source section 12 and the second point P2. As used herein, "located on a line" refers to not only cases in which the target point (here, the center C2 of the second circular arc 1152) exactly overlaps the line, but also cases in which they substantially overlap the line. include. "When they substantially overlap" refers to a case where the minimum distance from the line to the target point is within 20% of the length of the first light source section 12 in the direction parallel to the straight line.

第２円弧１１５２の中心Ｃ２は、第１光源部１２の中心と第２点Ｐ２との間にある。本実施形態では、第２円弧１１５２の中心Ｃ２と第１光源部１２の中心との間の距離は、第１円弧１１５１の半径以下である。また、複数の第２円弧１１５２の中心Ｃ２は、それぞれが異なる位置にある。複数の第２円弧１１５２は、平面視において、第１光源部１２の中心と第２点Ｐ２とを結ぶ直線に交差する。すなわち、第２円弧１１５２は、第２直線Ｄ２に交差する。 The center C2 of the second arc 1152 is between the center of the first light source section 12 and the second point P2. In this embodiment, the distance between the center C2 of the second arc 1152 and the center of the first light source section 12 is less than or equal to the radius of the first arc 1151. Moreover, the centers C2 of the plurality of second circular arcs 1152 are located at different positions. The plurality of second circular arcs 1152 intersect the straight line connecting the center of the first light source section 12 and the second point P2 in plan view. That is, the second circular arc 1152 intersects the second straight line D2.

（第１透光性部材１３）
第１透光性部材１３は、図３に示すように、第１貫通孔１１５内に位置する。第１透光性部材１３は、第１光源部１２が発する光に対する透光性を有する。第１光源部１２のピーク波長に対する第１透光性部材１３の透過率は、例えば、６０％以上が好ましく、８０％以上がより好ましい。 (First translucent member 13)
The first translucent member 13 is located within the first through hole 115, as shown in FIG. The first translucent member 13 has translucency to the light emitted by the first light source section 12 . The transmittance of the first transparent member 13 with respect to the peak wavelength of the first light source section 12 is preferably 60% or more, and more preferably 80% or more, for example.

第１透光性部材１３は、第１光源部１２の側面を覆う。第１透光性部材１３は、少なくとも、第１外周部１３１を含む。第１外周部１３１は、平面視において、第１貫通孔１１５の内側面と第１光源部１２の側面との間に配置される部分である。第１外周部１３１は、第１光源部１２と第１導光部材１１とに接することが好ましい。このようにすることで、第１光源部１２からの光を第１導光部材１１に入射させやすくなる。 The first translucent member 13 covers the side surface of the first light source section 12 . The first translucent member 13 includes at least a first outer peripheral portion 131 . The first outer peripheral portion 131 is a portion disposed between the inner surface of the first through hole 115 and the side surface of the first light source section 12 in plan view. It is preferable that the first outer circumferential portion 131 be in contact with the first light source section 12 and the first light guide member 11 . By doing so, it becomes easier to allow the light from the first light source section 12 to enter the first light guide member 11.

他の形態として、第１透光性部材１３は、第１光源部１２の上側に配置された第１上部を含む。第１光源部１２の上面を、第１透光性部材１３が覆っていることにより、第１光源部１２の直上領域の輝度むらを低減できる。例えば、第１光源部１２の上面を第１透光性部材１３が覆っていることにより、第１光源部１２からの光の一部が、後述の第１光反射性部材等で散乱反射されて、第１上部に導光される。これにより、第１光源部１２の直上領域が明るくなりすぎたり、暗くなりすぎたりすることを抑制できる。第１上部は、第１光源部１２の上面の一部のみを覆ってもよい。断面視における第１上部の上面の形状は、凸になるように湾曲してもよいし、凹になるように湾曲してもよい。 In another embodiment, the first light-transmitting member 13 includes a first upper portion disposed above the first light source section 12 . By covering the upper surface of the first light source section 12 with the first translucent member 13, uneven brightness in the region directly above the first light source section 12 can be reduced. For example, by covering the upper surface of the first light source section 12 with the first light-transmitting member 13, a portion of the light from the first light source section 12 is scattered and reflected by the first light-reflecting member, etc., which will be described later. Then, the light is guided to the first upper part. This can prevent the area directly above the first light source section 12 from becoming too bright or too dark. The first upper part may cover only a part of the upper surface of the first light source section 12. The shape of the upper surface of the first upper portion in a cross-sectional view may be curved in a convex manner or may be curved in a concave manner.

第１透光性部材１３は、Ｚ方向において、単層で構成されてもよいし、複数の層の積層体で構成されてもよい。また、第１透光性部材１３は蛍光体や光散乱粒子を含んでいてもよい。第１透光性部材１３が積層体である場合には、各層が蛍光体及び／又は光散乱粒子を含んでいてもよく、含んでいなくてもよい。例えば、第１透光性部材１３が、蛍光体を含む層と、蛍光体を含まない層とで構成されていてもよい。 The first translucent member 13 may be composed of a single layer or a laminate of a plurality of layers in the Z direction. Further, the first light-transmitting member 13 may contain fluorescent material or light-scattering particles. When the first translucent member 13 is a laminate, each layer may or may not contain a phosphor and/or light scattering particles. For example, the first light-transmitting member 13 may be composed of a layer containing a phosphor and a layer not containing a phosphor.

第１透光性部材１３の材料としては、例えば、熱硬化性樹脂又は光硬化性樹脂等が用いられる。熱硬化性樹脂としては、例えば、アクリル樹脂、シリコーン樹脂、エポキシ樹脂、フェノール樹脂、ＢＴ樹脂、ポリイミド樹脂又は不飽和ポリエステル樹脂等が挙げられる。例えば、第１透光性部材１３の材料として第１導光部材１１の材料と同じ樹脂、又は第１導光部材１１の材料よりも屈折率差が小さい樹脂を用いることができる。 As the material of the first translucent member 13, for example, thermosetting resin, photocuring resin, or the like is used. Examples of the thermosetting resin include acrylic resin, silicone resin, epoxy resin, phenol resin, BT resin, polyimide resin, and unsaturated polyester resin. For example, as the material of the first light-transmitting member 13, the same resin as the material of the first light guide member 11, or a resin having a smaller difference in refractive index than the material of the first light guide member 11 can be used.

第１透光性部材１３は、硬化することで収縮する材料であることが好ましい。第１透光性部材１３の成形収縮率は、例えば、１％以上１０％以下であり、より好ましくは２％以上６％以下である。第１光源部１２の側面から第１貫通孔１１５の内側面までの距離が長いほど、第１光源部１２と第１貫通孔１１５との間の第１外周部１３１の厚みを薄くすることができる。 The first translucent member 13 is preferably made of a material that shrinks when cured. The molding shrinkage rate of the first transparent member 13 is, for example, 1% or more and 10% or less, and more preferably 2% or more and 6% or less. The longer the distance from the side surface of the first light source section 12 to the inner surface of the first through hole 115, the thinner the thickness of the first outer peripheral section 131 between the first light source section 12 and the first through hole 115 becomes. can.

図６Ａには、第１光源部１２の中心と第１点Ｐ１とを結ぶ第１直線Ｄ１を通る断面図を示す。図６Ｂには、第１光源部１２の中心と第２点Ｐ２とを結ぶ第２直線Ｄ２を通る断面図を示す。第１直線Ｄ１を通る断面における第１外周部１３１の最小厚みＴ１は、第２直線Ｄ２を通る断面における第１外周部１３１の最小厚みＴ２よりも厚い。 FIG. 6A shows a cross-sectional view passing through the first straight line D1 connecting the center of the first light source section 12 and the first point P1. FIG. 6B shows a cross-sectional view passing through the second straight line D2 connecting the center of the first light source section 12 and the second point P2. The minimum thickness T1 of the first outer circumferential portion 131 in a cross section passing through the first straight line D1 is thicker than the minimum thickness T2 of the first outer circumferential portion 131 in a cross section passing through the second straight line D2.

第１直線Ｄ１を通る断面における第１外周部１３１の最小厚みＴ１は、第２直線Ｄ２を通る断面における第１外周部１３１の最小厚みＴ２の１．０５倍以上１．４倍以下であることが好ましい。最小厚みＴ１が最小厚みＴ２の１．０５倍以上であることにより、第１直線Ｄ１に沿う方向に第１外周部１３１を通る光の量を増やしやすくなる。最小厚みＴ１が最小厚みＴ２の１．４倍以下であることにより、第２直線Ｄ２に沿う方向に第１外周部１３１を通る光の量が減りすぎることを抑制することができる。例えば、最小厚みＴ１は、２３５μｍ以上４５０μｍ以下である。例えば、最小厚みＴ２は、１８５μｍ以上４２５μｍ以下である。 The minimum thickness T1 of the first outer peripheral part 131 in a cross section passing through the first straight line D1 is 1.05 times or more and no more than 1.4 times the minimum thickness T2 of the first outer peripheral part 131 in a cross section passing through the second straight line D2. is preferred. Since the minimum thickness T1 is 1.05 times or more the minimum thickness T2, it becomes easy to increase the amount of light passing through the first outer circumferential portion 131 in the direction along the first straight line D1. By setting the minimum thickness T1 to 1.4 times or less the minimum thickness T2, it is possible to prevent the amount of light passing through the first outer circumferential portion 131 from decreasing too much in the direction along the second straight line D2. For example, the minimum thickness T1 is 235 μm or more and 450 μm or less. For example, the minimum thickness T2 is 185 μm or more and 425 μm or less.

第１直線Ｄ１を通る断面における第１光源部１２の側面と第１貫通孔１１５の内側面との間の寸法Ｌ１が、第２直線Ｄ２を通る断面における第１光源部１２の側面と第１貫通孔１１５の内側面との間の寸法Ｌ２よりも短い。また、本実施形態では、第１透光性部材１３として、硬化することで収縮する材料が用いられている。第１透光性部材１３は、収縮によって、第１光源部１２及び第１貫通孔１１５から離れた位置ほど薄くなる。 The dimension L1 between the side surface of the first light source section 12 and the inner surface of the first through hole 115 in the cross section passing through the first straight line D1 is the same as the dimension L1 between the side surface of the first light source section 12 in the cross section passing through the second straight line D2 and the inner surface of the first through hole 115. It is shorter than the dimension L2 between the inner surface of the through hole 115 and the inner surface of the through hole 115. Furthermore, in this embodiment, the first translucent member 13 is made of a material that shrinks when cured. The first translucent member 13 becomes thinner at a position farther away from the first light source section 12 and the first through hole 115 due to contraction.

これによって、本実施形態では、第１直線Ｄ１を通る断面における第１外周部１３１の最小厚みＴ１を、第２直線Ｄ２を通る断面における第１外周部１３１の最小厚みＴ２よりも厚くすることができる。 Accordingly, in the present embodiment, the minimum thickness T1 of the first outer circumferential portion 131 in the cross section passing through the first straight line D1 can be made thicker than the minimum thickness T2 of the first outer circumferential portion 131 in the cross section passing through the second straight line D2. can.

第１直線Ｄ１を通る断面における第１光源部１２の側面と第１貫通孔１１５の内側面との間の寸法Ｌ１は、第２直線Ｄ２を通る断面における第１光源部１２の側面と第１貫通孔１１５の内側面との間の寸法Ｌ２の０．４倍以上０．９倍以下であることが好ましい。寸法Ｌ１が寸法Ｌ２の０．４倍以上であることにより、最小厚みＴ２が薄くなりすぎることを抑制できる。これにより、第２直線Ｄ２に沿う方向に第１外周部１３１を通る光の量が減りすぎることを抑制することができる。寸法Ｌ１が寸法Ｌ２の０．９倍以下であることにより、最小厚みＴ１を厚くしやすくなる。これにより、第１直線Ｄ１に沿う方向に第１外周部１３１を通る光の量を増やしやすくなる。例えば、寸法Ｌ１は、０．２５ｍｍ以上１．１ｍｍ以下である。例えば、寸法Ｌ２は、０．４ｍｍ以上２ｍｍ以下である。 The dimension L1 between the side surface of the first light source section 12 and the inner surface of the first through hole 115 in the cross section passing through the first straight line D1 is the same as the dimension L1 between the side surface of the first light source section 12 in the cross section passing through the second straight line D2 and the inner surface of the first through hole 115. It is preferably 0.4 times or more and 0.9 times or less of the dimension L2 between the through hole 115 and the inner surface. By setting the dimension L1 to 0.4 times or more the dimension L2, it is possible to prevent the minimum thickness T2 from becoming too thin. Thereby, it is possible to suppress the amount of light passing through the first outer circumferential portion 131 from decreasing too much in the direction along the second straight line D2. Since the dimension L1 is 0.9 times or less the dimension L2, it becomes easy to increase the minimum thickness T1. This makes it easier to increase the amount of light passing through the first outer peripheral portion 131 in the direction along the first straight line D1. For example, the dimension L1 is 0.25 mm or more and 1.1 mm or less. For example, the dimension L2 is 0.4 mm or more and 2 mm or less.

ただし、最小厚みＴ１＞最小厚みＴ２を実現する方法としては、これに制限されない。例えば、第１透光性部材１３が硬化した後、第１透光性部材１３の一部を除去することにより、第１透光性部材１３の厚みを薄くしてもよい。第１透光性部材１３の一部を除去する方法としては、例えば、研磨、切削、ブラスト、又は溶融等により実現される。したがって、第１透光性部材１３として、硬化しても収縮しない材料、又は硬化しても僅かしか収縮しない材料を用いてもよい。 However, the method for realizing the minimum thickness T1>minimum thickness T2 is not limited to this. For example, after the first light-transmitting member 13 is cured, a portion of the first light-transmitting member 13 may be removed to reduce the thickness of the first light-transmitting member 13. As a method for removing a part of the first light-transmitting member 13, for example, polishing, cutting, blasting, melting, or the like is implemented. Therefore, as the first light-transmitting member 13, a material that does not shrink even when cured, or a material that shrinks only slightly even when cured may be used.

第１光源部１２が発した光の一部は、第１外周部１３１を通って、第１貫通孔１１５の内側面から第１導光部材１１に入射し、他の一部は第１外周部１３１の上面で反射する。第１外周部１３１の上面で反射した光の一部は、第１光源部１２側に戻る。第１外周部１３１の厚みが厚いほど、第１光源部１２からの光が第１外周部１３１の上面で反射されにくくなり、第１外周部１３１を通って第１貫通孔１１５の内側面から第１導光部材１１に入射されやすくなる。すなわち、第１外周部１３１の厚みが厚い部分ほど、第１光源部１２が発した光のうちのより多くの量の光が第１導光部材１１に入射する。本実施形態では、第１直線Ｄ１を通る断面における第１外周部１３１の最小厚みＴ１が、第２直線Ｄ２を通る断面における第１外周部１３１の最小厚みＴ２よりも厚いので、第１直線Ｄ１を通る断面における第１外周部１３１は多くの量の光を第１導光部材１１に入射させることができる。第１光源部１２から遠い第１点Ｐ１は、第１光源部１２に近い第２点Ｐ２よりも輝度が低くなりやすいが、第１直線Ｄ１を通る断面における第１外周部１３１の最小厚みＴ１が厚いことにより、第１点Ｐ１の輝度が向上する。これにより、第１点Ｐ１での輝度と第２点Ｐ２での輝度とに差が生じることを抑制できる。この結果、第１発光モジュール１００の発光面の輝度むらを軽減できる。 A part of the light emitted by the first light source section 12 passes through the first outer peripheral part 131 and enters the first light guide member 11 from the inner surface of the first through hole 115, and the other part passes through the first outer peripheral part 131. It is reflected on the upper surface of the section 131. A portion of the light reflected on the upper surface of the first outer circumferential portion 131 returns to the first light source portion 12 side. The thicker the first outer peripheral part 131 is, the more difficult it is for the light from the first light source part 12 to be reflected on the upper surface of the first outer peripheral part 131, and the more the light from the first outer peripheral part 131 is reflected from the inner surface of the first through hole 115. It becomes easier for the light to enter the first light guide member 11 . That is, the thicker the first outer circumferential portion 131 is, the more light emitted from the first light source section 12 enters the first light guide member 11 . In this embodiment, the minimum thickness T1 of the first outer circumferential portion 131 in the cross section passing through the first straight line D1 is thicker than the minimum thickness T2 of the first outer circumferential portion 131 in the cross section passing through the second straight line D2. The first outer peripheral portion 131 in the cross section passing through can allow a large amount of light to enter the first light guide member 11 . The first point P1 that is far from the first light source section 12 tends to have lower luminance than the second point P2 that is closer to the first light source section 12, but the minimum thickness T1 of the first outer peripheral section 131 in the cross section passing through the first straight line D1 The brightness of the first point P1 is improved by increasing the thickness of the first point P1. Thereby, it is possible to suppress a difference between the brightness at the first point P1 and the brightness at the second point P2. As a result, uneven brightness on the light emitting surface of the first light emitting module 100 can be reduced.

（第１接着部材１４）
第１接着部材１４は、図３に示すように、第１導光部材１１よりも下側に配置される。第１接着部材１４は、第１導光部材１１と第１光反射性部材１５との間に配置され、第１導光部材１１と第１光反射性部材１５とを接着している。第１接着部材１４は、第１透光性部材１３と第１光反射性部材１５との間に配置され、第１透光性部材１３と第１光反射性部材１５とを接着している。 (First adhesive member 14)
The first adhesive member 14 is arranged below the first light guide member 11, as shown in FIG. The first adhesive member 14 is disposed between the first light guide member 11 and the first light reflective member 15 and bonds the first light guide member 11 and the first light reflective member 15 together. The first adhesive member 14 is disposed between the first light-transmitting member 13 and the first light-reflecting member 15, and adheres the first light-transmitting member 13 and the first light-reflecting member 15. .

第１接着部材１４は、第１光源部１２が発する光に対する反射性を有することが好ましい。第１光源部１２のピーク波長に対する第１接着部材１４の反射率は、例えば、６０％以上が好ましく、８０％以上がより好ましい。第１接着部材１４が反射性を有することにより、第１発光モジュール１００の下方へ抜ける光を抑制できる。第１接着部材１４は、第１導光部材１１の下面から第１光源部１２の下面にわたって対面するように配置されていることが好ましい。このようにすることで、第１発光モジュール１００の下方へ抜ける光を抑制しやすくなる。本明細書において、下方とは、第３方向（Ｚ方向）において、第１導光部材１０の第１上面１１１側から第１下面１１２側へ向かう方向のことである。本明細書において、上方とは、第３方向（Ｚ方向）において、第１導光部材１０の第１下面１１２側から第１上面１１１側へ向かう方向のことである。 It is preferable that the first adhesive member 14 has reflectivity for the light emitted by the first light source section 12. The reflectance of the first adhesive member 14 with respect to the peak wavelength of the first light source section 12 is preferably 60% or more, and more preferably 80% or more, for example. Since the first adhesive member 14 has reflective properties, light passing downward from the first light emitting module 100 can be suppressed. It is preferable that the first adhesive member 14 is disposed so as to face each other from the lower surface of the first light guide member 11 to the lower surface of the first light source section 12 . By doing so, it becomes easier to suppress light passing downward from the first light emitting module 100. In this specification, "downward" refers to a direction from the first upper surface 111 side to the first lower surface 112 side of the first light guide member 10 in the third direction (Z direction). In this specification, the term "upward" refers to a direction from the first lower surface 112 side to the first upper surface 111 side of the first light guide member 10 in the third direction (Z direction).

第１接着部材１４は、例えば、光散乱粒子を含む樹脂部材である。第１接着部材１４の樹脂は、例えば、上述の被覆部材１２４に用いることができる樹脂として列挙した樹脂から選択することができる。第１接着部材１４の光散乱粒子は、例えば、上述の被覆部材１２４に用いることができる光散乱粒子として列挙した光散乱粒子から選択することができる。 The first adhesive member 14 is, for example, a resin member containing light scattering particles. The resin for the first adhesive member 14 can be selected from, for example, the resins listed as resins that can be used for the covering member 124 described above. The light scattering particles of the first adhesive member 14 can be selected from, for example, the light scattering particles listed as light scattering particles that can be used for the covering member 124 described above.

（第１光反射性部材１５）
第１光反射性部材１５は、第１接着部材１４の下側に配置される。第１光反射性部材１５は、第１接着部材１４の下面の少なくとも一部と対向するように配置されている。第１光反射性部材１５は、第１接着部材１４の下面全体と対向するように配置されていることが好ましい。このようにすることで、第１発光モジュール１００の下方へ抜ける光を抑制しやすくなる。 (First light reflective member 15)
The first light reflective member 15 is arranged below the first adhesive member 14 . The first light reflective member 15 is arranged to face at least a portion of the lower surface of the first adhesive member 14 . It is preferable that the first light reflective member 15 is disposed so as to face the entire lower surface of the first adhesive member 14 . By doing so, it becomes easier to suppress light passing downward from the first light emitting module 100.

第１光反射性部材１５は、第１光源部１２が発する光に対する反射性を有する。第１光源部１２のピーク波長に対する第１光反射性部材１５の反射率は、例えば、６０％以上が好ましく、８０％以上がより好ましい。 The first light reflective member 15 has a reflectivity for the light emitted by the first light source section 12 . The reflectance of the first light reflective member 15 with respect to the peak wavelength of the first light source section 12 is preferably 60% or more, and more preferably 80% or more, for example.

第１光反射性部材１５として、例えば、多数の気泡を含む樹脂部材や、光散乱粒子を含む樹脂部材を用いることができる。第１光反射性部材１５の樹脂は、例えば、上述の第１接着部材１４に用いることができる樹脂として列挙した樹脂から選択することができる。第１光反射性部材１５の光散乱粒子は、例えば、上述の第１接着部材１４に用いることができる光散乱粒子として列挙した光散乱粒子から選択することができる。 As the first light reflective member 15, for example, a resin member containing many bubbles or a resin member containing light scattering particles can be used. The resin of the first light reflective member 15 can be selected from, for example, the resins listed as resins that can be used for the first adhesive member 14 described above. The light-scattering particles of the first light-reflecting member 15 can be selected from, for example, the light-scattering particles listed as light-scattering particles that can be used for the first adhesive member 14 described above.

第１光反射性部材１５の厚さは、第１接着部材１４の厚さよりも厚いことが好ましい。このようにすることで、第１光反射性部材１５の反射率を高くすることができる。例えば、第１接着部材１４の厚さは、１０μｍ以上５０μｍ以下である。例えば、第１光反射性部材１５の厚さは４０μｍ以上２００μｍ以下である。 The thickness of the first light reflective member 15 is preferably thicker than the thickness of the first adhesive member 14. By doing so, the reflectance of the first light reflective member 15 can be increased. For example, the thickness of the first adhesive member 14 is 10 μm or more and 50 μm or less. For example, the thickness of the first light reflective member 15 is 40 μm or more and 200 μm or less.

（第２接着部材１６）
第２接着部材１６は、第１光反射性部材１５の下側に配置される。第２接着部材１６は、第１光反射性部材１５と支持部材３００との間に配置され、第１光反射性部材１５と支持部材３００とを接着している。 (Second adhesive member 16)
The second adhesive member 16 is arranged below the first light reflective member 15 . The second adhesive member 16 is disposed between the first light reflective member 15 and the support member 300 and bonds the first light reflective member 15 and the support member 300 together.

第２接着部材１６は、第１光源部１２が発する光に対する反射性を有することが好ましい。第１光源部１２のピーク波長に対する第２接着部材１６の反射率は、例えば、６０％以上が好ましく、８０％以上がより好ましい。第２接着部材１６が反射性を有することにより、第１発光モジュール１００の下方へ抜ける光を抑制できる。第２接着部材１６は、第１光反射性部材１５の下面の少なくとも一部と対向するように配置されている。第２接着部材１６は、第１光反射性部材１５の下面全体と対向するように配置されていることが好ましい。このようにすることで、第１発光モジュール１００の下方へ抜ける光を抑制しやすくなる。 It is preferable that the second adhesive member 16 has reflectivity for the light emitted by the first light source section 12 . The reflectance of the second adhesive member 16 with respect to the peak wavelength of the first light source section 12 is preferably 60% or more, and more preferably 80% or more, for example. Since the second adhesive member 16 has reflective properties, light passing downward from the first light emitting module 100 can be suppressed. The second adhesive member 16 is arranged to face at least a portion of the lower surface of the first light reflective member 15 . It is preferable that the second adhesive member 16 is disposed so as to face the entire lower surface of the first light reflective member 15 . By doing so, it becomes easier to suppress light passing downward from the first light emitting module 100.

第２接着部材１６として、例えば、光散乱粒子を含む樹脂部材を用いることができる。第２接着部材１６の樹脂は、例えば、上述の第１接着部材１４に用いることができる樹脂として列挙した樹脂から選択することができる。第２接着部材１６の光散乱粒子は、例えば、上述の第１接着部材１４に用いることができる光散乱粒子として列挙した光散乱粒子から選択することができる。 As the second adhesive member 16, for example, a resin member containing light scattering particles can be used. The resin for the second adhesive member 16 can be selected from, for example, the resins listed as resins that can be used for the first adhesive member 14 described above. The light scattering particles of the second adhesive member 16 can be selected from, for example, the light scattering particles listed as the light scattering particles that can be used for the first adhesive member 14 described above.

第２接着部材１６の厚さは、第１接着部材１４の厚さよりも厚いことが好ましい。このようにすることで、第２接着部材１６の反射率を高くすることができる。例えば、第２接着部材１６の厚さは、３０μｍ以上１００μｍ以下である。第１光反射性部材１５の厚さは、第２接着部材１６の厚さよりも厚いことが好ましい。このようにすることで、第１光反射性部材１５の反射率を高くすることができる。 The thickness of the second adhesive member 16 is preferably thicker than the thickness of the first adhesive member 14. By doing so, the reflectance of the second adhesive member 16 can be increased. For example, the thickness of the second adhesive member 16 is 30 μm or more and 100 μm or less. The thickness of the first light reflective member 15 is preferably thicker than the thickness of the second adhesive member 16. By doing so, the reflectance of the first light reflective member 15 can be increased.

（第２光反射性部材１７）
第２光反射性部材１７は、第１光源部１２の上側に配置される。図２に示すように、第２光反射性部材１７は平面視において第１光源部１２と重なる位置に配置される。このようにすることで、第１光源部１２の直上領域が明るくなりすぎることを抑制することができる。これにより、発光領域における輝度むらが軽減される。 (Second light reflective member 17)
The second light reflective member 17 is arranged above the first light source section 12 . As shown in FIG. 2, the second light reflective member 17 is arranged at a position overlapping the first light source section 12 in plan view. By doing so, it is possible to prevent the area directly above the first light source section 12 from becoming too bright. This reduces brightness unevenness in the light emitting region.

第２光反射性部材１７は、第１光源部１２が発する光に対する反射性を有する。第２光反射性部材１７の反射率は、例えば、６０％以上が好ましく、８０％以上がより好ましい。第２光反射性部材１７は、１つでもよく、複数でもよい。 The second light reflective member 17 has reflectivity for the light emitted by the first light source section 12 . The reflectance of the second light reflective member 17 is preferably 60% or more, and more preferably 80% or more, for example. The number of the second light reflective members 17 may be one or more.

平面視における第２光反射性部材１７の形状は特に限定されない。平面視における第２光反射性部材１７の形状は、例えば、円形、三角形、四角形、六角形又は八角形等の形状とすることができる。 The shape of the second light reflective member 17 in plan view is not particularly limited. The shape of the second light reflective member 17 in plan view can be, for example, circular, triangular, quadrangular, hexagonal, or octagonal.

図３に示すように、本実施形態における第２光反射性部材１７は、第１光源部１２の上面を覆っている。図３に示すように、第２光反射性部材１７は第１光源部１２の上面の全面と接していてもよい。他の形態として、第２光反射性部材１７は、第１透光性部材１３を介して第１光源部１２の上面を覆っていてもよい。他の形態として、第２光反射性部材１７は第１透光性部材１３を介して第１光源部１２の上面を覆う部分と、第１光源部１２の上面と接する部分と、を備えてもよい。 As shown in FIG. 3, the second light reflective member 17 in this embodiment covers the upper surface of the first light source section 12. As shown in FIG. 3, the second light reflective member 17 may be in contact with the entire upper surface of the first light source section 12. As another form, the second light reflective member 17 may cover the upper surface of the first light source section 12 with the first light transmitting member 13 interposed therebetween. In another embodiment, the second light reflective member 17 includes a portion that covers the upper surface of the first light source section 12 via the first transparent member 13, and a portion that contacts the upper surface of the first light source section 12. Good too.

図６Ａに示すように、第１外周部１３１の上面のうちで第１外周部１３１が最小厚みＴ１である部分は、第２光反射性部材１７に覆われることが好ましい。このようにすることで、第１光源部１２からの光が、第１外周部１３１の上面のうちで第１外周部１３１が最小厚みＴ１である部分から上方に抜けることを低減できる。これにより、第１光源部１２からの光をより遠い領域まで導光させることができ、第１発光モジュール１００の輝度むらが軽減される。 As shown in FIG. 6A, a portion of the upper surface of the first outer circumferential portion 131 where the first outer circumferential portion 131 has the minimum thickness T1 is preferably covered with the second light reflective member 17. By doing so, it is possible to reduce the possibility that the light from the first light source section 12 escapes upward from the portion of the upper surface of the first outer circumferential section 131 where the first outer circumferential section 131 has the minimum thickness T1. Thereby, the light from the first light source section 12 can be guided to a farther area, and uneven brightness of the first light emitting module 100 can be reduced.

図６Ｂに示すように、第１外周部１３１の上面のうちで第１外周部１３１が最小厚みＴ２である部分は、第２光反射性部材１７に覆われることが好ましい。このようにすることで、第１光源部１２からの光が、第１外周部１３１の上面のうちで第１外周部１３１が最小厚みＴ２である部分から上方に抜けることを低減できる。これにより、第１光源部１２からの光をより遠い領域まで導光させることができ、第１発光モジュール１００の輝度むらが軽減される。 As shown in FIG. 6B, a portion of the upper surface of the first outer circumferential portion 131 where the first outer circumferential portion 131 has the minimum thickness T2 is preferably covered with the second light reflective member 17. By doing so, it is possible to reduce the possibility that the light from the first light source section 12 escapes upward from the portion of the upper surface of the first outer circumferential section 131 where the first outer circumferential section 131 has the minimum thickness T2. Thereby, the light from the first light source section 12 can be guided to a farther area, and uneven brightness of the first light emitting module 100 can be reduced.

第２光反射性部材１７は、第１透光性部材１３の上面と、その周辺の第１導光部材１１の第１上面１１１の上にまで延伸させてもよい。第２光反射性部材１７は、第１透光性部材１３の上面の少なくとも一部と第１導光部材１１の第１上面１１１の少なくとも一部を連続して覆うことが好ましい。このようにすることで、第１透光性部材１３と第１導光部材１１の界面の近傍が明るくなりすぎることを抑制することができる。また、他の形態としては、第２光反射性部材１７は、平面視において第１光源部１２と重ならない位置に配置してもよい。例えば、輝度むらを減らすために第１導光部材１１の第１上面１１１のうち輝度の高い領域に点在させてもよい。 The second light reflective member 17 may extend over the upper surface of the first transparent member 13 and the first upper surface 111 of the first light guide member 11 in the vicinity thereof. It is preferable that the second light reflective member 17 continuously covers at least a portion of the upper surface of the first transparent member 13 and at least a portion of the first upper surface 111 of the first light guide member 11 . By doing so, it is possible to prevent the vicinity of the interface between the first light-transmitting member 13 and the first light-guiding member 11 from becoming too bright. Moreover, as another form, the second light reflective member 17 may be arranged at a position that does not overlap with the first light source section 12 in plan view. For example, in order to reduce unevenness in brightness, they may be scattered in a region of high brightness on the first upper surface 111 of the first light guide member 11.

第２光反射性部材１７として、例えば、多数の気泡を含む樹脂部材や、光散乱粒子を含む樹脂部材を用いることができる。第２光反射性部材１７の樹脂は、例えば、上述の第１接着部材１４に用いることができる樹脂として列挙した樹脂から選択することができる。光散乱粒子は、例えば、上述の第１接着部材１４に用いることができる光散乱粒子として列挙した光散乱粒子から選択することができる。 As the second light reflective member 17, for example, a resin member containing many bubbles or a resin member containing light scattering particles can be used. The resin for the second light reflective member 17 can be selected from, for example, the resins listed as resins that can be used for the first adhesive member 14 described above. The light scattering particles can be selected, for example, from the light scattering particles listed as light scattering particles that can be used in the first adhesive member 14 described above.

（第３光反射性部材１８）
第３光反射性部材１８は、第１導光部材１１によって少なくとも一部が構成される区画溝１１Ａ内に配置される。本実施形態では、第３光反射性部材１８は、区画溝１１Ａの内面に沿うように層状に配置されている。第３光反射性部材１８は、単層で構成されてもよいし、複数の層の積層体で構成されてもよい。また、第３光反射性部材１８は、区画溝１１Ａ内に充填されていてもよい。第３光反射性部材１８が区画溝１１Ａ内に配置されることにより、例えば、発光状態の発光領域から非発光状態の発光領域への導光が、第３光反射性部材１８により制限される。これにより、発光状態の発光領域と非発光状態の発光領域とのコントラスト比を向上させることができる。 (Third light reflective member 18)
The third light reflective member 18 is arranged within the partition groove 11A, at least a part of which is formed by the first light guide member 11. In this embodiment, the third light reflective member 18 is arranged in a layered manner along the inner surface of the partition groove 11A. The third light reflective member 18 may be composed of a single layer or a laminate of a plurality of layers. Further, the third light reflective member 18 may be filled in the partition groove 11A. By disposing the third light reflective member 18 in the dividing groove 11A, the third light reflective member 18 restricts, for example, light guide from a light emitting region in a light emitting state to a light emitting region in a non-light emitting state. . Thereby, the contrast ratio between the light-emitting region in the light-emitting state and the light-emitting region in the non-light-emitting state can be improved.

第３光反射性部材１８は、第１光源部１２が発する光に対する反射性を有する部材である。第３光反射性部材１８の反射率は、例えば、６０％以上が好ましく、８０％以上がより好ましい。第３光反射性部材１８は、１つでもよく、複数でもよい。 The third light reflective member 18 is a member that is reflective to the light emitted by the first light source section 12 . The reflectance of the third light reflective member 18 is preferably 60% or more, and more preferably 80% or more, for example. The number of the third light reflective member 18 may be one or more.

第３光反射性部材１８として、例えば、多数の気泡を含む樹脂部材や、光散乱粒子を含む樹脂部材を用いることができる。第３光反射性部材１８の樹脂は、例えば、上述の第１接着部材１４に用いることができる樹脂として列挙した樹脂から選択することができる。第３光反射性部材１８の光散乱粒子は、例えば、上述の第１接着部材１４に用いることができる光散乱粒子として列挙した光散乱粒子から選択することができる。 As the third light reflective member 18, for example, a resin member containing many bubbles or a resin member containing light scattering particles can be used. The resin of the third light reflective member 18 can be selected from, for example, the resins listed as resins that can be used for the first adhesive member 14 described above. The light-scattering particles of the third light-reflecting member 18 can be selected from, for example, the light-scattering particles listed as light-scattering particles that can be used for the first adhesive member 14 described above.

（第２発光モジュール２００）
第２発光モジュール２００は、面状光源１０００の平面視において、中央領域Ｒ１を囲む外周領域Ｒ２に配置される。外周領域Ｒ２の外縁は平面視で四角形である。各第２発光モジュール２００は、図７に示すように、第２導光部材２１と、第２光源部２２と、第２透光性部材２３と、を備える。各第２発光モジュール２００は、さらに、第３接着部材２４と、第４光反射性部材２５と、第４接着部材２６と、第５光反射性部材２７と、第６光反射性部材２８と、を備える。 (Second light emitting module 200)
The second light emitting module 200 is arranged in an outer peripheral region R2 surrounding the central region R1 when the planar light source 1000 is viewed from above. The outer edge of the outer circumferential region R2 is quadrangular in plan view. As shown in FIG. 7, each second light emitting module 200 includes a second light guide member 21, a second light source section 22, and a second light transmitting member 23. Each second light emitting module 200 further includes a third adhesive member 24, a fourth light reflective member 25, a fourth adhesive member 26, a fifth light reflective member 27, and a sixth light reflective member 28. , is provided.

（第２光源部２２）
第２光源部２２は、第２発光モジュール２００における光源である。第２光源部２２は、第１光源部１２と同様の構造であるので説明を省略する。 (Second light source section 22)
The second light source section 22 is a light source in the second light emitting module 200. The second light source section 22 has the same structure as the first light source section 12, so a description thereof will be omitted.

（第２導光部材２１）
第２導光部材２１は、第２光源部２２が発した光が入射し、発光領域から出射する部材である。第２導光部材２１は、面状光源１０００の発光面を含む第２上面２１１と、第２上面２１１の反対側に位置する第２下面２１２と、を含む。第２導光部材２１は、第２上面２１１と第２下面２１２との間に位置する第２側面２１３を含む。本実施形態における第２導光部材２１は、第２側面２１３の一部から延びる延伸部２１４を含む。第２導光部材２１は、第１導光部材１１と同様の構造であるので、重複する説明を省略する。 (Second light guide member 21)
The second light guide member 21 is a member into which light emitted by the second light source section 22 enters and exits from the light emitting region. The second light guide member 21 includes a second upper surface 211 that includes the light emitting surface of the planar light source 1000, and a second lower surface 212 located on the opposite side of the second upper surface 211. The second light guide member 21 includes a second side surface 213 located between a second upper surface 211 and a second lower surface 212. The second light guide member 21 in this embodiment includes an extension portion 214 extending from a part of the second side surface 213. The second light guide member 21 has the same structure as the first light guide member 11, so a redundant explanation will be omitted.

第２導光部材２１は、第２光源部２２が配置される第２貫通孔２１５を含む。換言すると、第２光源部２２は、第２導光部材２１の第２貫通孔２１５内に配置される。第２貫通孔２１５は、第２導光部材２１の第２上面２１１から第２下面２１２まで貫通する。 The second light guide member 21 includes a second through hole 215 in which the second light source section 22 is disposed. In other words, the second light source section 22 is arranged within the second through hole 215 of the second light guide member 21 . The second through hole 215 penetrates from the second upper surface 211 to the second lower surface 212 of the second light guide member 21 .

図８に示すように、本実施形態では、第２貫通孔２１５は、Ｘ方向に長軸を有する長孔と、Ｙ方向に長軸を有する長孔とを、互いに重ねてできた形状の投影図と同じ形状である。本明細書でいう「長孔」は、長軸と短軸とを有する一方向に延びた円のことである。「長孔」には、楕円形のほか、二つの半円を二つの平行な接線で接続した形状も含む。 As shown in FIG. 8, in this embodiment, the second through hole 215 has a shape formed by overlapping a long hole having a long axis in the X direction and a long hole having a long axis in the Y direction. It has the same shape as the figure. A "long hole" as used herein is a circle extending in one direction and having a long axis and a short axis. In addition to an elliptical shape, the term "elongated hole" includes a shape in which two semicircles are connected by two parallel tangents.

ここで、平面視において、外周領域Ｒ２の外縁側に位置する第２導光部材２１の外縁のうちで第２光源部２２の中心から最も近い点を「第３点Ｐ３」とする。本明細書でいう「第２光源部２２の中心」とは、平面視における第２光源部２２の幾何学的な重心を意味する。本実施形態では、第３点Ｐ３は第２導光部材２１の一辺の中心に位置する。本実施形態では、図１０に示すように、角部に位置する第２発光モジュール２００の場合、第２導光部材２１が正方形であって、第２光源部２２の中心が第２導光部材２１の重心と同じ位置にあるため、第２発光モジュール２００は、複数の第３点Ｐ３を有する。第３点Ｐ３は、１つでもよいし、複数でもよい。 Here, in plan view, the point closest to the center of the second light source section 22 on the outer edge of the second light guide member 21 located on the outer edge side of the outer circumferential region R2 is defined as a "third point P3." The term "center of the second light source section 22" as used herein means the geometric center of gravity of the second light source section 22 in plan view. In this embodiment, the third point P3 is located at the center of one side of the second light guide member 21. In this embodiment, as shown in FIG. 10, in the case of the second light emitting module 200 located at a corner, the second light guide member 21 is square, and the center of the second light source section 22 is the second light guide member. 21, the second light emitting module 200 has a plurality of third points P3. There may be one or more third points P3.

（第２透光性部材２３）
第２透光性部材２３は、図８に示すように、第２貫通孔２１５内に位置する。第２透光性部材２３は、第２光源部２２の側面を覆う。第２透光性部材２３は、少なくとも、第２外周部２３１を含む。第２外周部２３１は、平面視において、第２貫通孔２１５の内側面と第２光源部２２の側面との間に配置される部分である。第２透光性部材２３は、第１透光性部材１３と同様の構造であるので、重複する説明を省略する。 (Second translucent member 23)
The second translucent member 23 is located within the second through hole 215, as shown in FIG. The second light-transmitting member 23 covers the side surface of the second light source section 22 . The second translucent member 23 includes at least a second outer circumferential portion 231 . The second outer peripheral portion 231 is a portion disposed between the inner surface of the second through hole 215 and the side surface of the second light source section 22 in plan view. The second light-transmitting member 23 has the same structure as the first light-transmitting member 13, so redundant explanation will be omitted.

図８に示すように、第２光源部２２の中心と第３点Ｐ３とを結ぶ直線を「第３直線Ｄ３」とする。第２光源部２２の中心と、隣接する第１発光モジュール１００の第１光源部１２の中心とを結ぶ直線を「第４直線Ｄ４」とする。この場合、第３直線Ｄ３を通る断面における第２外周部２３１の最小厚みＴ３（図９Ａ参照）は、第４直線Ｄ４を通る断面における第２外周部２３１の最小厚みＴ４（図９Ｂ参照）よりも厚い。本実施形態では、平面視において、第３直線Ｄ３を通る断面における第２光源部２２の側面と第２貫通孔２１５の内側面との間の寸法Ｌ３は、第４直線Ｄ４を通る断面における第２光源部２２の側面と第２貫通孔２１５の内側面との間の寸法Ｌ４よりも短い。このため、第２透光性部材２３として、硬化することで収縮する材料を用いることで、最小厚みＴ３＞最小厚みＴ４の関係が実現されている。 As shown in FIG. 8, a straight line connecting the center of the second light source section 22 and the third point P3 is referred to as a "third straight line D3." A straight line connecting the center of the second light source section 22 and the center of the first light source section 12 of the adjacent first light emitting module 100 is referred to as a "fourth straight line D4." In this case, the minimum thickness T3 (see FIG. 9A) of the second outer peripheral portion 231 in the cross section passing through the third straight line D3 is greater than the minimum thickness T4 (see FIG. 9B) of the second outer peripheral portion 231 in the cross section passing through the fourth straight line D4. It's also thick. In this embodiment, in plan view, the dimension L3 between the side surface of the second light source section 22 and the inner surface of the second through hole 215 in the cross section passing through the third straight line D3 is the same as the dimension L3 in the cross section passing through the fourth straight line D4. It is shorter than the dimension L4 between the side surface of the second light source section 22 and the inner surface of the second through hole 215. Therefore, by using a material that shrinks when cured as the second light-transmitting member 23, the relationship of minimum thickness T3>minimum thickness T4 is realized.

第３直線Ｄ３を通る断面における第２外周部２３１の最小厚みＴ３は、第４直線Ｄ４を通る断面における第２外周部２３１の最小厚みＴ４の１．０５倍以上１．４倍以下であることが好ましい。最小厚みＴ３が最小厚みＴ４の１．０５倍以上であることにより、第３直線Ｄ３に沿う方向に第２外周部２３１を通る光の量を増やしやすくなる。第３直線Ｄ３を通る断面における第２外周部２３１の最小厚みＴ３が、第４直線Ｄ４を通る断面における第２外周部２３１の最小厚みＴ４の１．４倍以下であることにより、第４直線Ｄ４に沿う方向に第２外周部２３１を通る光の量が減りすぎることを抑制することができる。例えば、最小厚みＴ３は、２３５μｍ以上４５０μｍ以下である。例えば、最小厚みＴ４は、１８５μｍ以上４２５μｍ以下である。 The minimum thickness T3 of the second outer peripheral portion 231 in a cross section passing through the third straight line D3 is 1.05 times or more and no more than 1.4 times the minimum thickness T4 of the second outer peripheral portion 231 in a cross section passing through the fourth straight line D4. is preferred. Since the minimum thickness T3 is 1.05 times or more the minimum thickness T4, it becomes easy to increase the amount of light passing through the second outer peripheral portion 231 in the direction along the third straight line D3. The minimum thickness T3 of the second outer peripheral part 231 in the cross section passing through the third straight line D3 is 1.4 times or less of the minimum thickness T4 of the second outer peripheral part 231 in the cross section passing through the fourth straight line D4, so that the fourth straight line It is possible to prevent the amount of light passing through the second outer circumferential portion 231 from decreasing too much in the direction along D4. For example, the minimum thickness T3 is 235 μm or more and 450 μm or less. For example, the minimum thickness T4 is 185 μm or more and 425 μm or less.

第３直線Ｄ３を通る断面における第２光源部２２の側面と第２貫通孔２１５の内側面との間の寸法Ｌ３は、第４直線Ｄ４を通る断面における第２光源部２２の側面と第２貫通孔２１５の内側面との間の寸法Ｌ４の０．３倍以上０．９倍以下であることが好ましい。寸法Ｌ３が寸法Ｌ４の０．３倍以上であることにより、第４直線Ｄ４を通る断面における第２外周部２３１の最小厚みＴ４が薄くなりすぎることを抑制できる。寸法Ｌ３が寸法Ｌ４の０．９倍以下であることにより、最小厚みＴ３を厚くしやすくなる。例えば、寸法Ｌ３は、０．２５ｍｍ以上１．１μｍｍ以下である。例えば、寸法Ｌ４は、０．４５ｍｍ以上２ｍｍ以下である。 The dimension L3 between the side surface of the second light source section 22 and the inner surface of the second through hole 215 in the cross section passing through the third straight line D3 is the same as the dimension L3 between the side surface of the second light source section 22 in the cross section passing through the fourth straight line D4 and the inner surface of the second through hole 215. It is preferably 0.3 times or more and 0.9 times or less of the dimension L4 between the through hole 215 and the inner surface. When the dimension L3 is 0.3 times or more the dimension L4, it is possible to suppress the minimum thickness T4 of the second outer circumferential portion 231 in the cross section passing through the fourth straight line D4 from becoming too thin. Since the dimension L3 is 0.9 times or less of the dimension L4, it becomes easy to increase the minimum thickness T3. For example, the dimension L3 is 0.25 mm or more and 1.1 μm or less. For example, the dimension L4 is 0.45 mm or more and 2 mm or less.

また、図１０に示すように、外周領域Ｒ２の角部に位置する第２発光モジュール２００において、第２光源部２２の中心と、隣接する第２発光モジュール２００の第２光源部２２の中心と、を結ぶ直線を「第５直線Ｄ５」とする。この場合、第３直線Ｄ３を通る断面における第２外周部２３１の最小厚みＴ３（図９Ａ参照）は、第５直線Ｄ５を通る断面における第２外周部２３１の最小厚みＴ５（図１１参照）よりも厚い。本実施形態では、平面視において、第３直線Ｄ３を通る断面における第２光源部２２の側面と第２貫通孔２１５の内側面との間の寸法Ｌ３は、第５直線Ｄ５を通る断面における第２光源部２２の側面と第２貫通孔２１５の内側面との間の寸法Ｌ５よりも短い。 Further, as shown in FIG. 10, in the second light emitting module 200 located at the corner of the outer peripheral region R2, the center of the second light source section 22 and the center of the second light source section 22 of the adjacent second light emitting module 200 The straight line connecting , is defined as "fifth straight line D5". In this case, the minimum thickness T3 (see FIG. 9A) of the second outer peripheral portion 231 in the cross section passing through the third straight line D3 is greater than the minimum thickness T5 (see FIG. 11) of the second outer peripheral portion 231 in the cross section passing through the fifth straight line D5. It's also thick. In the present embodiment, in plan view, the dimension L3 between the side surface of the second light source section 22 and the inner surface of the second through hole 215 in the cross section passing through the third straight line D3 is the same as the dimension L3 in the cross section passing through the fifth straight line D5. It is shorter than the dimension L5 between the side surface of the second light source section 22 and the inner surface of the second through hole 215.

第３直線Ｄ３を通る断面における第２外周部２３１の最小厚みＴ３は、第５直線Ｄ５を通る断面における第２外周部２３１の最小厚みＴ５の１．０５倍以上１．５倍以下であることが好ましい。最小厚みＴ３が最小厚みＴ５の１．０５倍以上であることにより、第３直線Ｄ３に沿う方向に第２外周部２３１を通る光の量を増やしやすくなる。最小厚みＴ３が最小厚みＴ５の１．５倍以下であることにより、第５直線Ｄ５に沿う方向に第２外周部２３１を通る光の量が減りすぎることを抑制することができる。例えば、最小厚みＴ５は、１７０μｍ以上４２５μｍ以下である。 The minimum thickness T3 of the second outer peripheral portion 231 in a cross section passing through the third straight line D3 is 1.05 times or more and no more than 1.5 times the minimum thickness T5 of the second outer peripheral portion 231 in a cross section passing through the fifth straight line D5. is preferred. Since the minimum thickness T3 is 1.05 times or more the minimum thickness T5, it becomes easy to increase the amount of light passing through the second outer peripheral portion 231 in the direction along the third straight line D3. By setting the minimum thickness T3 to 1.5 times or less the minimum thickness T5, it is possible to prevent the amount of light passing through the second outer circumferential portion 231 from decreasing too much in the direction along the fifth straight line D5. For example, the minimum thickness T5 is 170 μm or more and 425 μm or less.

第３直線Ｄ３を通る断面における第２光源部２２の側面と第２貫通孔２１５の内側面との間の寸法Ｌ３は、第５直線Ｄ５を通る断面における第２光源部２２の側面と第２貫通孔２１５の内側面との間の寸法Ｌ５の０．２倍以上０．８倍以下であることが好ましい。寸法Ｌ３が寸法Ｌ５の０．２倍以上であることにより、最小厚みＴ５が薄くなりすぎることを抑制できる。寸法Ｌ３が寸法Ｌ５の０．８倍以下であることにより、最小厚みＴ３を厚くしやすくなる。例えば、寸法Ｌ５は、０．５ｍｍ以上２ｍｍ以下である。 The dimension L3 between the side surface of the second light source section 22 and the inner surface of the second through hole 215 in the cross section passing through the third straight line D3 is the same as the dimension L3 between the side surface of the second light source section 22 and the inner surface of the second through hole 215 in the cross section passing through the fifth straight line D5. It is preferable that it is 0.2 times or more and 0.8 times or less of the dimension L5 between the through hole 215 and the inner surface. Since the dimension L3 is 0.2 times or more the dimension L5, it is possible to prevent the minimum thickness T5 from becoming too thin. Since the dimension L3 is 0.8 times or less the dimension L5, it becomes easy to increase the minimum thickness T3. For example, the dimension L5 is 0.5 mm or more and 2 mm or less.

第２透光性部材２３として、硬化することで収縮する材料を用いることで、最小厚みＴ３＞最小厚みＴ５の関係が実現されている。ただし、最小厚みＴ３＞最小厚みＴ４、又は／及び、最小厚みＴ３＞最小厚みＴ５を実現する方法としては、これに制限されない。例えば、第２透光性部材２３が硬化した後、第２透光性部材２３の一部を除去することにより、第２透光性部材２３の厚みを薄くしてもよい。第２透光性部材２３の一部を除去する方法としては、例えば、研磨、切削、ブラスト、又は溶融等により実現される。 By using a material that shrinks when cured as the second light-transmitting member 23, the relationship of minimum thickness T3>minimum thickness T5 is realized. However, the method for realizing minimum thickness T3>minimum thickness T4 and/or minimum thickness T3>minimum thickness T5 is not limited to this. For example, after the second light-transmitting member 23 is cured, a portion of the second light-transmitting member 23 may be removed to reduce the thickness of the second light-transmitting member 23. A method for removing a portion of the second light-transmitting member 23 is, for example, polishing, cutting, blasting, melting, or the like.

通常、面状光源１０００において、外周領域Ｒ２の縁には、光が導光されにくく、外縁近傍の輝度は低下しやすい。本実施形態では、平面視において、第３直線Ｄ３を通る断面における第２外周部２３１の最小厚みＴ３は、第４直線Ｄ４を通る断面における第２外周部２３１の最小厚みＴ４よりも厚いため、輝度むらを軽減できる。また、本実施形態では、外周領域Ｒ２の角部に位置する第２発光モジュール２００において、第３直線Ｄ３を通る断面における第２外周部２３１の最小厚みＴ３は、第５直線Ｄ５を通る断面における第２外周部２３１の最小厚みＴ５よりも厚いため、輝度が低下しやすい角部においても、輝度むらを軽減できる。 Normally, in the planar light source 1000, light is difficult to be guided to the edge of the outer peripheral region R2, and the brightness near the outer edge tends to decrease. In the present embodiment, in plan view, the minimum thickness T3 of the second outer circumferential portion 231 in a cross section passing through the third straight line D3 is thicker than the minimum thickness T4 of the second outer circumferential portion 231 in a cross section passing through the fourth straight line D4. Brightness unevenness can be reduced. Further, in the present embodiment, in the second light emitting module 200 located at a corner of the outer peripheral region R2, the minimum thickness T3 of the second outer peripheral portion 231 in the cross section passing through the third straight line D3 is the same as the minimum thickness T3 in the cross section passing through the fifth straight line D5. Since it is thicker than the minimum thickness T5 of the second outer peripheral portion 231, uneven brightness can be reduced even at corners where brightness tends to decrease.

（第３接着部材２４）
第３接着部材２４は、第２導光部材２１と第４光反射性部材２５との間に配置され、第２導光部材２１と第４光反射性部材２５とを接着している。第３接着部材２４は、第２透光性部材２３と第４光反射性部材２５との間に配置され、第２透光性部材２３と第４光反射性部材２５とを接着している。第３接着部材２４は、第１接着部材１４と同様の構造であるので説明を省略する。第３接着部材２４と第１接着部材１４は別体により形成されてもよく、一体的に形成された同一部材であってもよい。 (Third adhesive member 24)
The third adhesive member 24 is disposed between the second light guide member 21 and the fourth light reflective member 25 and bonds the second light guide member 21 and the fourth light reflective member 25 together. The third adhesive member 24 is disposed between the second light-transmitting member 23 and the fourth light-reflecting member 25, and adheres the second light-transmitting member 23 and the fourth light-reflecting member 25. . The third adhesive member 24 has the same structure as the first adhesive member 14, so a description thereof will be omitted. The third adhesive member 24 and the first adhesive member 14 may be formed as separate members, or may be the same member that is integrally formed.

（第４光反射性部材２５）
第４光反射性部材２５は、第３接着部材２４の下側に配置される。第４光反射性部材２５は、第１光反射性部材１５と同様の構造であるので説明を省略する。第４光反射性部材２５と第１光反射性部材１５は別体により形成されてもよく、一体的に形成された同一部材であってもよい。 (Fourth light reflective member 25)
The fourth light reflective member 25 is arranged below the third adhesive member 24 . The fourth light reflective member 25 has the same structure as the first light reflective member 15, so a description thereof will be omitted. The fourth light reflective member 25 and the first light reflective member 15 may be formed as separate bodies, or may be the same integrally formed member.

（第４接着部材２６）
第４接着部材２６は、第４光反射性部材２５と支持部材３００との間に配置され、第４光反射性部材２５と支持部材３００とを接着している。第４接着部材２６は、第２接着部材１６と同様の構造であるので説明を省略する。第４接着部材２６と第２接着部材１６は別体により形成されてもよく、一体的に形成された同一部材であってもよい。 (Fourth adhesive member 26)
The fourth adhesive member 26 is disposed between the fourth light reflective member 25 and the support member 300 and bonds the fourth light reflective member 25 and the support member 300 together. The fourth adhesive member 26 has the same structure as the second adhesive member 16, so a description thereof will be omitted. The fourth adhesive member 26 and the second adhesive member 16 may be formed separately, or may be the same integrally formed member.

（第５光反射性部材２７）
第５光反射性部材２７は、第２光源部２２の上側に配置される。図８に示すように、第２光反射性部材１７は平面視において第２光源部２２と重なる位置に配置される。第５光反射性部材２７は、第２光反射性部材１７と同様の構造であるので説明を省略する。 (Fifth light reflective member 27)
The fifth light reflective member 27 is arranged above the second light source section 22 . As shown in FIG. 8, the second light reflective member 17 is arranged at a position overlapping the second light source section 22 in plan view. The fifth light reflective member 27 has the same structure as the second light reflective member 17, so a description thereof will be omitted.

（第６光反射性部材２８）
第６光反射性部材２８は、第２導光部材２１によって少なくとも一部が構成される区画溝１１Ａ内に配置される。本明細書において、第１導光部材１１及び第２導光部材２１によって少なくとも一部が構成される区画溝１１Ａ内に配置され、且つ、反射性を有する部材を第３光反射性部材１８と称する。第６光反射性部材２８は、第３光反射性部材１８と同様の構造であるので説明を省略する。第６光反射性部材２８と第３光反射性部材１８は別体により形成されてもよく、一体的に形成された同一部材であってもよい。 (Sixth light reflective member 28)
The sixth light reflective member 28 is disposed within the dividing groove 11A, at least a portion of which is formed by the second light guiding member 21. In this specification, a reflective member disposed in the partition groove 11A, at least a part of which is formed by the first light guide member 11 and the second light guide member 21, is referred to as the third light reflective member 18. to be called. The sixth light reflective member 28 has the same structure as the third light reflective member 18, so a description thereof will be omitted. The sixth light reflective member 28 and the third light reflective member 18 may be formed as separate bodies, or may be the same integrally formed member.

（支持部材３００）
支持部材３００上には、第１発光モジュール１００及び第２発光モジュール２００が配置される。本実施形態では、支持部材３００の上面と、第２接着部材１６の下面及び第４接着部材２６と、が対向する。図３に示すように、第１光源部１２及び第２光源部２２は支持部材３００上に配置される。支持部材３００と、第１導光部材１１との間には、第１接着部材１４、第１光反射性部材１５及び第２接着部材１６が配置される。支持部材３００と、第２導光部材２１との間には、第３接着部材２４、第４光反射性部材２５及び第４接着部材２６が配置される。 (Support member 300)
The first light emitting module 100 and the second light emitting module 200 are arranged on the support member 300 . In this embodiment, the upper surface of the support member 300 faces the lower surface of the second adhesive member 16 and the fourth adhesive member 26. As shown in FIG. 3, the first light source section 12 and the second light source section 22 are arranged on a support member 300. A first adhesive member 14 , a first light reflective member 15 , and a second adhesive member 16 are arranged between the support member 300 and the first light guide member 11 . A third adhesive member 24 , a fourth light reflective member 25 , and a fourth adhesive member 26 are arranged between the support member 300 and the second light guide member 21 .

本実施形態では、第１発光モジュール１００を支持する支持部材３００と、第２発光モジュール２００を支持する支持部材３００とは共通である。なお、第１発光モジュール１００を支持する支持部材３００と、第２発光モジュール２００を支持部材３００とは、個別の支持部材３００であってもよい。 In this embodiment, the support member 300 that supports the first light emitting module 100 and the support member 300 that supports the second light emitting module 200 are common. Note that the support member 300 that supports the first light emitting module 100 and the support member 300 that supports the second light emitting module 200 may be separate support members 300.

支持部材３００は、配線基板３１を有する。配線基板３１は、絶縁基材３１１と、絶縁基材３１１の上面及び下面の少なくとも一方の面に配置された第１導電部材３１２と、を有する。絶縁基材３１１は、リジッド基板であってもよく、フレキシブル基板であってもよい。Ｚ方向において、面状光源１０００を小型化するために絶縁基材３１１はフレキシブル基板であることが好ましい。絶縁基材３１１は、Ｚ方向において単層で構成されてもよいし、複数の層の積層体で構成されてもよい。例えば、絶縁基材３１１は、単層のフレキシブル基板で構成されていてもよく、複数のリジッド基板の積層体で構成されていてもよい。絶縁基材３１１の材料として、例えば、ポリイミドなどの樹脂を用いることができる。第１導電部材３１２は、金属膜であり、例えば銅膜である。 The support member 300 has a wiring board 31. The wiring board 31 includes an insulating base material 311 and a first conductive member 312 disposed on at least one of the upper surface and the lower surface of the insulating base material 311. The insulating base material 311 may be a rigid substrate or a flexible substrate. In order to downsize the planar light source 1000 in the Z direction, the insulating base material 311 is preferably a flexible substrate. The insulating base material 311 may be composed of a single layer in the Z direction, or may be composed of a laminate of a plurality of layers. For example, the insulating base material 311 may be composed of a single-layer flexible substrate, or may be composed of a laminate of a plurality of rigid substrates. As the material of the insulating base material 311, for example, resin such as polyimide can be used. The first conductive member 312 is a metal film, for example, a copper film.

支持部材３００は、第１絶縁層３２を含んでもよい。第１絶縁層３２は、配線基板３１の下面に配置され、第１導電部材３１２を覆っている。第１絶縁層３２の材料として、例えば、エポキシ樹脂、ウレタン樹脂又はアクリル樹脂が用いられる。 Support member 300 may include a first insulating layer 32 . The first insulating layer 32 is disposed on the lower surface of the wiring board 31 and covers the first conductive member 312. As the material for the first insulating layer 32, for example, epoxy resin, urethane resin, or acrylic resin is used.

支持部材３００は、第２導電部材３３を含んでもよい。第２導電部材３３は、例えば、樹脂と、樹脂中に含まれる金属粒子とを含む。第２導電部材３３の樹脂として、例えば、エポキシ樹脂又はフェノール樹脂が用いられる。金属粒子として、例えば、銅又は銀の粒子を用いることができる。 The support member 300 may include a second conductive member 33. The second conductive member 33 includes, for example, resin and metal particles contained in the resin. As the resin for the second conductive member 33, for example, epoxy resin or phenol resin is used. As metal particles, for example, copper or silver particles can be used.

第２導電部材３３は、接続部３３１と配線部３３２とを有する。接続部３３１は、第１発光モジュール１００では、第１接着部材１４、第１光反射性部材１５、第２接着部材１６及び絶縁基材３１１をＺ方向に貫通している。配線部３３２は、絶縁基材３１１の下面に配置される。配線部３３２は、接続部３３１及び第１導電部材３１２と繋がっている。また、接続部３３１は、第２発光モジュール２００では、第３接着部材２４、第４光反射性部材２５、第４接着部材２６及び絶縁基材３１１をＺ方向に貫通している。 The second conductive member 33 has a connecting portion 331 and a wiring portion 332. In the first light emitting module 100, the connecting portion 331 penetrates the first adhesive member 14, the first light reflective member 15, the second adhesive member 16, and the insulating base material 311 in the Z direction. The wiring section 332 is arranged on the lower surface of the insulating base material 311. The wiring portion 332 is connected to the connecting portion 331 and the first conductive member 312. Further, in the second light emitting module 200, the connecting portion 331 penetrates the third adhesive member 24, the fourth light reflective member 25, the fourth adhesive member 26, and the insulating base material 311 in the Z direction.

第１光源部１２及び第２光源部２２の正負の一対の電極１２１１に対応して、一対の第２導電部材３３が互いに離れて配置されている。一方の第２導電部材３３の接続部３３１は、第１光源部１２及び第２の光源部の下方において正側の電極１２１１と接続され、他方の第２導電部材３３の接続部３３１は、第１光源部１２及び第２の光源部の下方において負側の電極１２１１と接続されている。電極１２１１は、第２導電部材３３及び第１導電部材３１２と電気的に接続されている。 A pair of second conductive members 33 are arranged apart from each other, corresponding to the pair of positive and negative electrodes 1211 of the first light source section 12 and the second light source section 22. The connecting part 331 of one second conductive member 33 is connected to the positive electrode 1211 below the first light source part 12 and the second light source part, and the connecting part 331 of the other second conductive member 33 is connected to the positive electrode 1211 below the first light source part 12 and the second light source part. It is connected to the negative side electrode 1211 below the first light source section 12 and the second light source section. The electrode 1211 is electrically connected to the second conductive member 33 and the first conductive member 312.

支持部材３００は、第２絶縁層３４を含んでもよい。第２絶縁層３４は、第２導電部材３３の下面を覆って保護している。 Support member 300 may include a second insulating layer 34. The second insulating layer 34 covers and protects the lower surface of the second conductive member 33.

面状光源１０００は、第１光源部１２及び第２光源部２２の上方に配置される光学シートを備えていてもよい。光学シートには、プリズムシート、光拡散シートなどが挙げられる。光学シートは、第２光反射性部材１７及び第５光反射性部材２７と接していてもよく、離れていてもよい。光学シートは、導光部材と接していてもよく、離れていてもよい。このようにすることで、光学シートと空気の界面で光源部からの光が全反射するので、第１光源部１２及び第２光源部２２からの光をより遠い領域まで導光させやすくできる。 The planar light source 1000 may include an optical sheet disposed above the first light source section 12 and the second light source section 22. Examples of optical sheets include prism sheets and light diffusion sheets. The optical sheet may be in contact with the second light reflective member 17 and the fifth light reflective member 27, or may be separated from them. The optical sheet may be in contact with the light guide member or may be apart from the light guide member. By doing so, the light from the light source section is totally reflected at the interface between the optical sheet and the air, so that the light from the first light source section 12 and the second light source section 22 can be easily guided to a farther area.

［変形例］
上記実施形態は、本発明の様々な実施形態の１つに過ぎない。本発明に係る一実施形態は、種々の変更が可能である。以下、本発明の変形例を説明する。以下に説明する変形例は、適宜組み合わせて適用可能である。 [Modified example]
The embodiment described above is only one of various embodiments of the present invention. One embodiment of the present invention can be modified in various ways. Modifications of the present invention will be described below. The modified examples described below can be applied in combination as appropriate.

一変形例に係る第１貫通孔１１５は、図１２Ａに示すように、複数の第３円弧１１５３を含む。第３円弧１１５３の中心Ｃ３は、第２直線Ｄ２上に位置する。第３円弧１１５３の中心Ｃ３は、第１光源部１２の中心と、第２点Ｐ２との間に位置する。本変形例では、第１直線Ｄ１を通る断面における、第１光源部１２の側面と第１貫通孔１１５の内側面との間の距離は、第２直線Ｄ２を通る断面における、第１光源部１２の側面と第１貫通孔１１５の内側面との間の距離よりも短い。このため、第１直線Ｄ１を通る断面における、第１外周部１３１の最小厚みは、第２直線Ｄ２を通る断面における、第１外周部１３１の最小厚みよりも厚くなる。 The first through hole 115 according to a modified example includes a plurality of third circular arcs 1153, as shown in FIG. 12A. The center C3 of the third circular arc 1153 is located on the second straight line D2. The center C3 of the third arc 1153 is located between the center of the first light source section 12 and the second point P2. In this modification, the distance between the side surface of the first light source section 12 and the inner surface of the first through hole 115 in the cross section passing through the first straight line D1 is the same as the distance between the side surface of the first light source section 12 and the inner surface of the first through hole 115 in the cross section passing through the second straight line D2. 12 and the inner surface of the first through hole 115. Therefore, the minimum thickness of the first outer circumferential portion 131 in the cross section passing through the first straight line D1 is thicker than the minimum thickness of the first outer circumferential portion 131 in the cross section passing through the second straight line D2.

他の変形例に係る第１貫通孔１１５は、図１２Ｂに示すように、平面視において多角形である。多角形としては、例えば、三角形、四角形、五角形、又は六角形等が挙げられる。本変形例に係る第１貫通孔１１５は、平面視四角形である。第１貫通孔１１５の各辺４１は、Ｘ方向及びＹ方向に対して傾斜している。本変形例では、第１貫通孔１１５の各辺４１とＸ軸（Ｘ方向に平行な軸）とのなす角は４５°であり、第１貫通孔１１５の各辺４１とＹ軸（Ｙ方向に平行な軸）とのなす角は４５°である。第１貫通孔１１５の内側面は、光源の側面に対して傾斜している。複数の辺４１のうちの少なくとも１つの辺４１は、第１直線Ｄ１に交差する。複数の頂点４２のうちの少なくとも１つの頂点４２は、第２直線Ｄ２上に位置する。 The first through hole 115 according to another modification has a polygonal shape in plan view, as shown in FIG. 12B. Examples of polygons include triangles, quadrilaterals, pentagons, and hexagons. The first through hole 115 according to this modification has a rectangular shape in plan view. Each side 41 of the first through hole 115 is inclined with respect to the X direction and the Y direction. In this modification, the angle between each side 41 of the first through hole 115 and the X axis (axis parallel to the X direction) is 45°, and the angle between each side 41 of the first through hole 115 and the Y axis (axis parallel to the The angle it makes with the axis parallel to ) is 45°. The inner surface of the first through hole 115 is inclined with respect to the side surface of the light source. At least one side 41 among the plurality of sides 41 intersects with the first straight line D1. At least one vertex 42 among the plurality of vertices 42 is located on the second straight line D2.

他の変形例に係る第１貫通孔１１５は、図１２Ｃに示すように、複数の第１円弧１１５１と、複数の第２円弧１１５２を含む。第２円弧１１５２の中心Ｃ２は、上記実施形態と同様、第１光源部１２の中心と第２点Ｐ２とを結ぶ第２直線Ｄ２上に位置する。第２直線Ｄ２は、少なくとも１つの第２円弧１１５２に交差する。また、第１直線Ｄ１は、少なくとも１つの第１円弧１１５１に交差する。上記実施形態では、第２円弧１１５２の中心Ｃ２と第１光源部１２の中心との間の距離は、第１円弧１１５１の半径以下であるが、本変形例では、第２円弧１１５２の中心と第１光源部１２の中心との間の距離は、第１円弧１１５１の半径以上である。 The first through hole 115 according to another modification includes a plurality of first circular arcs 1151 and a plurality of second circular arcs 1152, as shown in FIG. 12C. The center C2 of the second circular arc 1152 is located on the second straight line D2 connecting the center of the first light source section 12 and the second point P2, as in the above embodiment. The second straight line D2 intersects at least one second circular arc 1152. Further, the first straight line D1 intersects at least one first circular arc 1151. In the above embodiment, the distance between the center C2 of the second arc 1152 and the center of the first light source section 12 is less than or equal to the radius of the first arc 1151, but in this modification, the distance between the center C2 of the second arc 1152 and the center The distance from the center of the first light source section 12 is equal to or greater than the radius of the first circular arc 1151.

一変形例に係る第１導光部材１１は、図１３Ａに示すように、第１上面１１１が、平面視において、長手方向と短手方向とに延長している。第１導光部材１１は、Ｙ方向を長手方向とし、Ｘ方向を短手方向とした長方形状に形成されている。第１貫通孔１１５は、Ｘ方向に長軸を有する長孔と、Ｙ方向に長軸を有する長孔とを、互いに重ねてできた形状の投影図と同じ形状である。 As shown in FIG. 13A, in the first light guide member 11 according to a modified example, the first upper surface 111 extends in the longitudinal direction and the lateral direction in a plan view. The first light guide member 11 is formed in a rectangular shape with the Y direction as the longitudinal direction and the X direction as the lateral direction. The first through-hole 115 has the same shape as a projection view of a shape formed by overlapping a long hole having a long axis in the X direction and a long hole having a long axis in the Y direction.

ここで、平面視において、第１光源部１２の中心を通りかつ第１導光部材１１の長手方向に沿う直線を「第６直線Ｄ６」とし、第１光源部１２の中心を通り短手方向に沿う直線を「第７直線Ｄ７」とする。本変形例に係る第１発光モジュール１００では、上記実施形態と同様、第１直線Ｄ１を通る断面における第１外周部１３１の最小厚みは、第２直線Ｄ２（ここでは第７直線Ｄ７と同じ）を通る断面における第１外周部１３１の最小厚みよりも厚い。本変形例に係る第１発光モジュール１００では、それに加え、第６直線Ｄ６を通る断面における第１外周部１３１の最小厚みは、第７直線Ｄ７を通る断面における第１外周部１３１の最小厚みよりも厚い。 Here, in a plan view, a straight line passing through the center of the first light source section 12 and along the longitudinal direction of the first light guide member 11 is referred to as a "sixth straight line D6", which passes through the center of the first light source section 12 in the transverse direction. The straight line along is defined as "seventh straight line D7". In the first light emitting module 100 according to the present modification, as in the above embodiment, the minimum thickness of the first outer peripheral portion 131 in the cross section passing through the first straight line D1 is the second straight line D2 (here, the same as the seventh straight line D7). It is thicker than the minimum thickness of the first outer circumferential portion 131 in a cross section passing through. In the first light emitting module 100 according to the present modification, in addition, the minimum thickness of the first outer circumferential portion 131 in a cross section passing through the sixth straight line D6 is smaller than the minimum thickness of the first outer circumferential portion 131 in a cross section passing through the seventh straight line D7. It's also thick.

他の変形例に係る第１導光部材１１は、図１３Ｂに示すように、第１上面１１１が、平面視において、長手方向と短手方向とに延長している。第１導光部材１１は、Ｙ方向を長手方向とし、Ｘ方向を短手方向とした長方形状に形成されている。第１貫通孔１１５は、短手方向に長軸を有する長孔である。本変形例に係る第１発光モジュール１００では、上記実施形態と同様、第１直線Ｄ１を通る断面における第１外周部１３１の最小厚みは、第２直線Ｄ２（ここでは第７直線Ｄ７と同じ）を通る断面における第１外周部１３１の最小厚みよりも厚い。本変形例に係る第１発光モジュール１００では、それに加え、第６直線Ｄ６を通る断面における第１外周部１３１の最小厚みは、第７直線Ｄ７を通る断面における第１外周部１３１の最小厚みよりも厚い。 In the first light guide member 11 according to another modification, as shown in FIG. 13B, the first upper surface 111 extends in the longitudinal direction and the transverse direction in plan view. The first light guide member 11 is formed in a rectangular shape with the Y direction as the longitudinal direction and the X direction as the lateral direction. The first through hole 115 is a long hole having a long axis in the transverse direction. In the first light emitting module 100 according to the present modification, as in the above embodiment, the minimum thickness of the first outer peripheral portion 131 in the cross section passing through the first straight line D1 is the second straight line D2 (here, the same as the seventh straight line D7). It is thicker than the minimum thickness of the first outer circumferential portion 131 in a cross section passing through. In the first light emitting module 100 according to the present modification, in addition, the minimum thickness of the first outer circumferential portion 131 in a cross section passing through the sixth straight line D6 is smaller than the minimum thickness of the first outer circumferential portion 131 in a cross section passing through the seventh straight line D7. It's also thick.

上記実施形態に係る面状光源１０００は、第１接着部材１４と、第１光反射性部材１５と、第２接着部材１６と、第２光反射性部材１７と、第３光反射性部材１８とを備えたが、これらはなくてもよい。また、面状光源１０００は、第３接着部材２４と、第４光反射性部材２５と、第４接着部材２６と、第５光反射性部材２７と、第６光反射性部材２８とを備えていなくてもよい。 The planar light source 1000 according to the above embodiment includes a first adhesive member 14, a first light reflective member 15, a second adhesive member 16, a second light reflective member 17, and a third light reflective member 18. However, these are not necessary. The planar light source 1000 also includes a third adhesive member 24 , a fourth light reflective member 25 , a fourth adhesive member 26 , a fifth light reflective member 27 , and a sixth light reflective member 28 . It doesn't have to be.

以上、具体例を参照しつつ、本発明の実施形態について説明した。しかし、本発明は、これらの具体例に限定されるものではない。本発明の上述した実施形態を基にして、当業者が適宜設計変更して実施し得る全ての形態も、本発明の要旨を包含する限り、本発明の範囲に属する。その他、本発明の思想の範疇において、当業者であれば、各種の変更例及び修正例に想到し得るものであり、それら変更例及び修正例についても本発明の範囲に属するものである。 The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. All forms that can be implemented by appropriately modifying the design based on the above-described embodiments of the present invention by those skilled in the art also belong to the scope of the present invention as long as they encompass the gist of the present invention. In addition, those skilled in the art will be able to come up with various changes and modifications within the scope of the present invention, and these changes and modifications also fall within the scope of the present invention.

Ｒ１ 中央領域
Ｒ２ 外周領域
１００ 第１発光モジュール
１１ 第１導光部材
１１１ 第１上面
１１２ 第１下面
１１５ 第１貫通孔
１１５１ 第１円弧
１１５２ 第２円弧
１１５３ 第３円弧
１２ 第１光源部
１３ 第１透光性部材
１３１ 第１外周部
２００ 第２発光モジュール
２１ 第２導光部材
２１１ 第２上面
２１２ 第２下面
２１５ 第２貫通孔
２２ 第２光源部
２３ 第２透光性部材
２３１ 第２外周部
Ｐ１ 第１点
Ｐ２ 第２点
Ｐ３ 第３点
Ｄ１ 第１直線
Ｄ２ 第２直線
Ｄ３ 第３直線
Ｄ４ 第４直線
Ｄ５ 第５直線 R1 central region R2 outer peripheral region 100 first light emitting module 11 first light guiding member 111 first upper surface 112 first lower surface 115 first through hole 1151 first circular arc 1152 second circular arc 1153 third circular arc 12 first light source section 13 first Transparent member 131 First outer peripheral part 200 Second light emitting module 21 Second light guiding member 211 Second upper surface 212 Second lower surface 215 Second through hole 22 Second light source part 23 Second transparent member 231 Second outer peripheral part P1 1st point P2 2nd point P3 3rd point D1 1st straight line D2 2nd straight line D3 3rd straight line D4 4th straight line D5 5th straight line

Claims (9)

第１上面と、前記第１上面の反対側に位置する第１下面と、前記第１上面から前記第１下面まで貫通する第１貫通孔と、を有する第１導光部材と、
前記第１貫通孔内に配置される第１光源部と、
前記第１貫通孔内において前記第１貫通孔と前記第１光源部との間に位置する第１外周部を有する第１透光性部材と、を備え、
平面視において、前記第１光源部の中心と、前記第１導光部材の外縁のうちで前記第１光源部から最も遠い第１点と、を結ぶ第１直線を通る断面における前記第１外周部の最小厚みは、前記第１光源部の中心と、前記第１導光部材の外縁のうちで前記第１光源部から最も近い第２点と、を結ぶ第２直線を通る断面における前記第１外周部の最小厚みよりも厚い、
発光モジュール。 a first light guide member having a first upper surface, a first lower surface located on the opposite side of the first upper surface, and a first through hole penetrating from the first upper surface to the first lower surface;
a first light source section disposed within the first through hole;
a first light-transmitting member having a first outer peripheral portion located between the first through-hole and the first light source part in the first through-hole;
In a plan view, the first outer periphery in a cross section passing through a first straight line connecting the center of the first light source section and a first point farthest from the first light source section among the outer edges of the first light guide member. The minimum thickness of the section is defined as the minimum thickness of the first light source section in a cross section passing through a second straight line connecting the center of the first light source section and a second point on the outer edge of the first light guide member that is closest to the first light source section. 1 thicker than the minimum thickness of the outer periphery,
light emitting module. 前記第１透光性部材が熱硬化性樹脂を含む、
請求項１に記載の発光モジュール。 the first translucent member includes a thermosetting resin;
The light emitting module according to claim 1. 前記第１貫通孔の外縁は、複数の円弧を含む、
請求項１又は２に記載の発光モジュール。 The outer edge of the first through hole includes a plurality of circular arcs,
The light emitting module according to claim 1 or 2. 前記複数の円弧は、
平面視において前記第１光源部の中心と同じ位置に中心を有し、前記第１直線と交差する第１円弧と、
平面視において前記第２直線上に中心を有し、前記第２直線と交差する第２円弧と、を有する、
請求項３に記載の発光モジュール。 The plurality of circular arcs are
a first circular arc having a center at the same position as the center of the first light source section in plan view and intersecting the first straight line;
a second circular arc having a center on the second straight line and intersecting the second straight line in a plan view;
The light emitting module according to claim 3. 前記複数の円弧は第３円弧を有し、
前記第３円弧の中心は、前記第２直線上において前記第１光源部の中心と前記第２点との間にある、
請求項４に記載の発光モジュール。 the plurality of circular arcs has a third circular arc,
The center of the third arc is between the center of the first light source section and the second point on the second straight line,
The light emitting module according to claim 4. 平面視において、前記第１貫通孔は多角形であり、
前記第１貫通孔は、
平面視において前記第１直線上に位置する辺と、
平面視において前記第２直線上に位置する頂点と、を含む、
請求項１又は２に記載の発光モジュール。 In plan view, the first through hole is polygonal,
The first through hole is
a side located on the first straight line in plan view;
a vertex located on the second straight line in plan view,
The light emitting module according to claim 1 or 2. 前記第１導光部材の上面は、長手方向と短手方向とに延長し、
平面視において、前記第１光源部の中心を通り前記長手方向に沿う直線を通る断面における前記第１外周部の最小厚みは、前記第１光源部の中心を通り前記短手方向に沿う直線を通る断面における前記第１外周部の最小厚みよりも厚い、
請求項１～６のいずれか一項に記載の発光モジュール。 The upper surface of the first light guide member extends in the longitudinal direction and the transverse direction,
In a plan view, the minimum thickness of the first outer circumferential portion in a cross section passing through the center of the first light source section and passing along a straight line along the longitudinal direction is equal to thicker than the minimum thickness of the first outer peripheral portion in the cross section passing through;
The light emitting module according to any one of claims 1 to 6. 請求項１～７のいずれか一項に記載の少なくとも１つの発光モジュールである第１発光モジュールと、
複数の第２発光モジュールと、を含み、
前記第１発光モジュールは中央領域に位置し、
前記複数の第２発光モジュールは、前記中央領域を囲む外周領域に位置し、
前記複数の第２発光モジュールの少なくとも１つは、
第２上面と、前記第２上面の反対側に位置する第２下面と、前記第２上面から前記第２下面まで貫通する第２貫通孔と、を有する第２導光部材と、
前記第２貫通孔内に配置される第２光源部と、
前記第２貫通孔内に位置し、前記第２貫通孔と前記第２光源部との間に位置する第２外周部を有する第２透光性部材と、を備え、
平面視において、前記第２光源部の中心と、前記外周領域の外縁のうちで前記第２光源部から最も近い第３点と、を結ぶ第３直線を通る断面における前記第２外周部の最小厚みは、前記第２光源部の中心と、隣接する前記第１発光モジュールの前記第１光源部の中心と、を結ぶ第４直線を通る断面における前記第２外周部の最小厚みよりも厚い、
発光モジュール。 a first light emitting module which is at least one light emitting module according to any one of claims 1 to 7;
A plurality of second light emitting modules,
the first light emitting module is located in a central area;
The plurality of second light emitting modules are located in an outer peripheral area surrounding the central area,
At least one of the plurality of second light emitting modules,
a second light guide member having a second upper surface, a second lower surface located on the opposite side of the second upper surface, and a second through hole penetrating from the second upper surface to the second lower surface;
a second light source section disposed within the second through hole;
a second light-transmitting member having a second outer circumferential portion located within the second through-hole and located between the second through-hole and the second light source section;
In plan view, the minimum of the second outer circumference in a cross section passing through a third straight line connecting the center of the second light source and a third point closest to the second light source on the outer edge of the outer circumferential region; The thickness is thicker than the minimum thickness of the second outer peripheral part in a cross section passing through a fourth straight line connecting the center of the second light source part and the center of the first light source part of the adjacent first light emitting module.
light emitting module. 前記外周領域の外縁は、平面視において四角形であり、
前記外周領域の角部に位置する前記第２発光モジュールにおける前記第３直線を通る断面における前記第２外周部の最小厚みは、平面視における前記第２光源部の中心と、隣接する前記第２発光モジュールの第２光源部の中心と、を通る第５直線を通る断面における前記第２外周部の最小厚みよりも厚い、
請求項８に記載の発光モジュール。 The outer edge of the outer peripheral area is a quadrilateral in plan view,
The minimum thickness of the second outer circumference in a cross section passing through the third straight line in the second light emitting module located at a corner of the outer circumferential area is between the center of the second light source section and the adjacent second light source section in plan view. thicker than the minimum thickness of the second outer peripheral portion in a cross section passing through the center of the second light source section of the light emitting module and a fifth straight line passing through;
The light emitting module according to claim 8.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019192386A (en) 2018-04-20 2019-10-31 日亜化学工業株式会社 Light source module
JP2021166133A (en) 2020-04-06 2021-10-14 日亜化学工業株式会社 Planar light source and planar light source manufacturing method
US20210382354A1 (en) 2020-06-03 2021-12-09 Nichia Corporation Planar light source and method of manufacturing the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019192386A (en) 2018-04-20 2019-10-31 日亜化学工業株式会社 Light source module
JP2021166133A (en) 2020-04-06 2021-10-14 日亜化学工業株式会社 Planar light source and planar light source manufacturing method
US20210382354A1 (en) 2020-06-03 2021-12-09 Nichia Corporation Planar light source and method of manufacturing the same

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