JP2010049867A - Light source module and illuminating device equipped with the same - Google Patents

Light source module and illuminating device equipped with the same Download PDF

Info

Publication number
JP2010049867A
JP2010049867A JP2008211525A JP2008211525A JP2010049867A JP 2010049867 A JP2010049867 A JP 2010049867A JP 2008211525 A JP2008211525 A JP 2008211525A JP 2008211525 A JP2008211525 A JP 2008211525A JP 2010049867 A JP2010049867 A JP 2010049867A
Authority
JP
Japan
Prior art keywords
light
light source
incident
guide member
optical axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2008211525A
Other languages
Japanese (ja)
Inventor
Hideaki Nagura
秀明 名倉
Eiji Kurimoto
英治 栗本
Sumuto Nishioka
澄人 西岡
Masaaki Hanano
雅昭 花野
Toru Hanaoka
透 花岡
Keiji Sakai
啓至 酒井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Priority to JP2008211525A priority Critical patent/JP2010049867A/en
Publication of JP2010049867A publication Critical patent/JP2010049867A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Planar Illumination Modules (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light source module in which utilization efficiency can be improved, and to provide an illuminating device equipped with the same. <P>SOLUTION: With the light source module, an optical axis J1 of a first light source 2 and an optical axis J2 of a second light source 12 are shifted from each other. With this, in case light irradiated from the first and the second light sources 2, 12 directly reach a second and a first end faces 1B, 1A of a light guide member 1 without being taken out from a light-extraction face 1D without being diffused by a diffusion structure 6, it can be made incident into sites 1B-2, 1A-2 adjacent to a second and a first light-incident faces 1B-1, 1A-1 out of the second and the first end faces 1B, 1A. Therefore, the light from the first and the second light sources 2, 12 can be prevented from entering the second and the first light sources 12, 2 opposed to the second and the first incident faces 1B-1, 1A-1. Further, the light from the first and the second light sources 2, 12 can be sent back into the light guide member 1 by reflecting it at sites 1B-2, 1A-2 adjacent to the second and the first incident faces 1B-1, 1A-1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

この発明は、導光部材を利用した光源モジュールおよび照明装置に関する。   The present invention relates to a light source module and an illumination device using a light guide member.

従来、導光板を利用した面および線状の光源モジュールが、液晶テレビ用バックライト、スキャナ、コピー機などに用いられている。導光板を用いた光源モジュールとしては、特許文献１(特許第３０６４００６号公報)に記載のものがある。   Conventionally, surface and linear light source modules using a light guide plate are used in backlights for liquid crystal televisions, scanners, copiers, and the like. As a light source module using a light guide plate, there is one described in Patent Document 1 (Japanese Patent No. 3060406).

図９を参照して、この特許文献１に開示された導光板を利用した光源モジュールを説明する。この光源モジュールは、透明導光板１０２と、導光板１０２の両端に取り付けられた光源１０１と、透明導光板１０２の裏面に取り付けられた白色散乱反射板１０４,拡散透過部１０５と、光源１０１の光を透明導光板１０２に結合させるための湾曲反射板１０６とを備える。この光源モジュールでは、光源１０１から放射された光は、透明導光板１０２に結合され、全反射を繰り返すことによって透明導光板１０２内を導光されて行く。このとき、透明導光板１０２に形成されている拡散透過部１０５に入射した光は、散乱され、全反射条件を満たさなくなる。これにより、上記散乱した光は、透明導光板１０２の表面に形成された光拡散層１０３を透過し、透明導光板１０２の外に放射される。   With reference to FIG. 9, a light source module using the light guide plate disclosed in Patent Document 1 will be described. The light source module includes a transparent light guide plate 102, a light source 101 attached to both ends of the light guide plate 102, a white scattering reflection plate 104 attached to the back surface of the transparent light guide plate 102, a diffuse transmission part 105, and light from the light source 101. And a curved reflector 106 for coupling the transparent light guide plate 102 to the transparent light guide plate 102. In this light source module, light emitted from the light source 101 is coupled to the transparent light guide plate 102 and guided through the transparent light guide plate 102 by repeating total reflection. At this time, the light incident on the diffuse transmission part 105 formed on the transparent light guide plate 102 is scattered and does not satisfy the total reflection condition. As a result, the scattered light passes through the light diffusion layer 103 formed on the surface of the transparent light guide plate 102 and is emitted outside the transparent light guide plate 102.

しかしながら、上記従来の透明導光板１０２を利用した光源モジュール１００においては、以下のような問題がある。すなわち、上記光源モジュールにおいては、透明導光板１０２の端部に配置された２つの光源１０１の光軸(光源１０１の中心線)が一致しているので、透明導光板１０２の一方の端面に配置された光源１０１から放射された光が、拡散透過部１０５によって光拡散層１０３から取り出されることなく透明導光板１０２の他方の端面にまで導光した場合、他方の端面に配置された光源１０１に入射し易い。   However, the light source module 100 using the conventional transparent light guide plate 102 has the following problems. That is, in the light source module, since the optical axes of the two light sources 101 arranged at the end of the transparent light guide plate 102 (center line of the light source 101) coincide with each other, they are arranged on one end surface of the transparent light guide plate 102. When the light emitted from the light source 101 is guided to the other end face of the transparent light guide plate 102 without being taken out from the light diffusion layer 103 by the diffusion transmission part 105, the light source 101 disposed on the other end face Easy to enter.

特に、光源１０１から光軸方向に放射された光はその強度も強く、透明導光板１０２内を直線的に進むことになり、拡散透過部１０５で反射されることなくそのまま他端面の光源１０１に入射してしまう。こうして、光源１０１に再入射した光は吸収されるか、湾曲反射板１０６によって反射され再度、透明導光板１０２に結合されることになる。この光源１０１から放射された光が、湾曲反射板１０６と透明導光板１０２によって多重反射を繰り返したりすることによって反射損失の影響を受けるので、透明導光板１０２から放射される光量を光源光量で除算した光利用効率が小さくなってしまうという問題がある。
特許第３０６４００６号公報 In particular, the light emitted from the light source 101 in the optical axis direction has a high intensity and travels linearly through the transparent light guide plate 102, and is directly reflected on the light source 101 on the other end without being reflected by the diffuse transmission part 105. Incident. Thus, the light re-entering the light source 101 is absorbed or reflected by the curved reflecting plate 106 and again coupled to the transparent light guide plate 102. The light emitted from the light source 101 is affected by reflection loss due to repeated reflection by the curved reflecting plate 106 and the transparent light guide plate 102. Therefore, the light amount emitted from the transparent light guide plate 102 is divided by the light source amount. There is a problem that the light utilization efficiency is reduced.
Japanese Patent No. 3060406

そこで、この発明の課題は、光利用効率を向上できる光源モジュールおよびそれを備えた照明装置を提供することにある。   Accordingly, an object of the present invention is to provide a light source module capable of improving light utilization efficiency and a lighting device including the same.

上記課題を解決するため、この発明の光源モジュールは、第１の光源と、
第２の光源と、
上記第１の光源から光が入射する第１の入射面を含む第１の端面と、上記第１の端面とは反対側の端面をなすと共に上記第２の光源から光が入射する第２の入射面を含む第２の端面と、上記第１の端面と第２の端面との間に位置していると共に上記第１,第２の入射面から入射した光を出射させる光取り出し面と、上記第１の端面と第２の端面との間に位置していると共に上記光取り出し面が向いている方向とは反対方向を向いている背面とを含む導光部材と、
上記背面に形成されていると共に上記第１,第２の入射面から入射した上記第１,第２の光源からの光を拡散させる拡散構造とを備え、
上記第１の光源は上記第１の入射面に対向して配置されていると共に上記第２の光源は上記第２の入射面に対向して配置されており、上記第１の光源の光軸と上記第２の光源の光軸とが互いにずれていることを特徴としている。 In order to solve the above problems, a light source module of the present invention includes a first light source,
A second light source;
A first end surface including a first incident surface on which light is incident from the first light source and an end surface opposite to the first end surface, and a second light on which light is incident from the second light source A second end surface including an incident surface; a light extraction surface that is located between the first end surface and the second end surface and emits light incident from the first and second incident surfaces; A light guide member including a back surface positioned between the first end surface and the second end surface and facing a direction opposite to the direction in which the light extraction surface is facing;
A diffusion structure formed on the back surface and diffusing light from the first and second light sources incident from the first and second incident surfaces;
The first light source is disposed to face the first incident surface, and the second light source is disposed to face the second incident surface. The optical axis of the first light source And the optical axis of the second light source are different from each other.

この発明の光源モジュールによれば、上記第１の光源の光軸と上記第２の光源の光軸とが互いにずれている。これにより、上記第１,第２の光源から放射された光が拡散構造で拡散されずに光取り出し面から取り出されることなく、直接に上記導光部材の第２,第１の端面に達した場合に、上記第２,第１の端面のうちの第２,第１の入射面の隣りの領域に入射するようにできる。よって、上記第１,第２の光源からの光が第２,第１の入射面に対向する第２,第１の光源に入射することを抑制できる。そして、上記第１,第２の光源からの光を上記第２,第１の入射面に隣接する部分で反射させて導光部材内に戻すことができる。これにより、上記光取り出し面から効率的に光を取り出すことが可能となる。   According to the light source module of the present invention, the optical axis of the first light source and the optical axis of the second light source are shifted from each other. As a result, the light emitted from the first and second light sources reaches the second and first end surfaces of the light guide member directly without being diffused by the diffusion structure and extracted from the light extraction surface. In this case, the light can enter the region adjacent to the second and first incident surfaces of the second and first end surfaces. Therefore, it can suppress that the light from the said 1st, 2nd light source injects into the 2nd, 1st light source which opposes a 2nd, 1st incident surface. And the light from the said 1st, 2nd light source can be reflected in the part adjacent to the said 2nd, 1st entrance plane, and can be returned in a light guide member. Thereby, light can be efficiently extracted from the light extraction surface.

特に、上記第１,第２の光源から光軸方向に放射される光はその強度も強く導光部材内を直線的に進むことになる。したがって、光軸方向に放射された光は、従来例の様に光軸をずらしていない場合はそのまま第２,第１の端面に配置された第２,第１の光源に入射することになる。   In particular, the light emitted from the first and second light sources in the direction of the optical axis has a strong intensity and travels linearly in the light guide member. Therefore, the light emitted in the direction of the optical axis is incident on the second and first light sources arranged on the second and first end faces as long as the optical axis is not shifted as in the conventional example. .

これに対し、本発明においては、第１,第２の光源の光軸をずらして配置しているので、第１,第２の光源からの光は第２,第１の光源に入射することなく、第２,第１の端面で反射されて導光部材内で再び導光されることになる。この再び導光部材内に戻された反射光は一般的に正反射成分以外に拡散成分が含まれる。よって、上記端面で導光部材内に反射された反射光は、上記拡散構造で散乱されることになり、上記導光部材の光取り出し面から外に取り出すことができる。よって、光利用効率を大きくすることが可能となる。   On the other hand, in the present invention, since the optical axes of the first and second light sources are shifted, the light from the first and second light sources is incident on the second and first light sources. Instead, the light is reflected by the second and first end faces and guided again in the light guide member. The reflected light returned into the light guide member again generally includes a diffusion component in addition to the regular reflection component. Therefore, the reflected light reflected in the light guide member at the end face is scattered by the diffusion structure, and can be taken out from the light extraction surface of the light guide member. Therefore, the light use efficiency can be increased.

また、一実施形態の光源モジュールでは、上記第１の光源の光軸と上記第２の光源の光軸とが、上記導光部材の光取り出し面の法線方向に互いにずれている。   In one embodiment, the optical axis of the first light source and the optical axis of the second light source are shifted from each other in the normal direction of the light extraction surface of the light guide member.

この実施形態によれば、上記光取り出し面の奥行方向のサイズの縮小を図れる。   According to this embodiment, the size of the light extraction surface in the depth direction can be reduced.

また、一実施形態の光源モジュールでは、上記第１の光源の光軸と上記第２の光源の光軸とが、上記導光部材の光取り出し面の法線方向と上記第１の入射面の法線方向とに直交する奥行き方向に互いにずれている。   Moreover, in the light source module of one embodiment, the optical axis of the first light source and the optical axis of the second light source correspond to the normal direction of the light extraction surface of the light guide member and the first incident surface. They are shifted from each other in the depth direction perpendicular to the normal direction.

この実施形態によれば、上記第１の光源の光軸と上記第２の光源の光軸とが、上記導光部材の光取り出し面の法線方向に互いにずれている場合に比べて、光取り出し方向の薄型化を図れる。   According to this embodiment, compared with the case where the optical axis of the first light source and the optical axis of the second light source are shifted from each other in the normal direction of the light extraction surface of the light guide member, Thinning in the take-out direction can be achieved.

また、一実施形態の光源モジュールでは、上記第１の光源の光軸の延長線上にあると共に上記第２の入射面の隣りに位置する上記導光部材の箇所に配置した第１の反射部と、上記第２の光源の光軸の延長線上にあると共に上記第１の入射面の隣りに位置する上記導光部材の箇所に配置した第２の反射部とのうちの少なくとも一方を備える。   Moreover, in the light source module of one embodiment, the first reflecting portion disposed on the light guide member located on the extension line of the optical axis of the first light source and adjacent to the second incident surface; And at least one of a second reflecting portion disposed on the light guide member located on the extension line of the optical axis of the second light source and adjacent to the first incident surface.

この実施形態によれば、上記第１,第２の光源から上記第１,第２の入射面に入射して導光部材内を通って上記第２,第１の入射面の隣りに位置する第１,第２の反射部に入射した光は、上記第１,第２の反射部で反射されて導光部材内に効率よく戻すことができる。したがって、導光部材の第１,第２の端面での反射光の利用効率を向上でき、光利用効率を向上できる。   According to this embodiment, the light enters the first and second incident surfaces from the first and second light sources, passes through the light guide member, and is positioned next to the second and first incident surfaces. The light incident on the first and second reflecting portions is reflected by the first and second reflecting portions and can be efficiently returned into the light guide member. Therefore, the utilization efficiency of the reflected light at the first and second end faces of the light guide member can be improved, and the light utilization efficiency can be improved.

また、一実施形態の光源モジュールでは、上記第１の反射部の反射面の法線は上記第１の光源の光軸に対して傾斜しており、上記第２の反射部の反射面の法線は上記第２の光源の光軸に対して傾斜している。   In the light source module of one embodiment, the normal line of the reflection surface of the first reflection unit is inclined with respect to the optical axis of the first light source, and the method of the reflection surface of the second reflection unit is used. The line is inclined with respect to the optical axis of the second light source.

この実施形態によれば、上記第１,第２の光源からの光を上記第１,第２の反射部の傾斜した反射面で上記導光部材の光取り出し面もしくは背面に向けて反射できる。よって、上記反射面で反射した光が第１,第２の光源に向かって戻らないようにして、光利用効率を向上できる。   According to this embodiment, the light from the first and second light sources can be reflected toward the light extraction surface or the back surface of the light guide member by the inclined reflecting surfaces of the first and second reflecting portions. Therefore, the light utilization efficiency can be improved by preventing the light reflected by the reflecting surface from returning toward the first and second light sources.

すなわち、上記導光部材内で導光されてきた光は、上記端面に配置された反射面に法線方向から入射した場合には、正反射成分は入射方向と正反対の方向(反射面の法線方向)に反射される。したがって、上記反射面の法線方向が光軸と平行である場合は、反射光の正反射成分は拡散構造によって散乱されずに、再び元の光源に直接に戻されることになる。この場合には、導光部材の外に取り出す光量が減少することとなる。なお、一般的には、反射光には正反射成分以外の拡散成分を含んでいるので、端面で反射された光の一部は拡散構造に入射することとなり取り出すことができる。しかしながら、上記正反射成分が大きな場合は、端面に配置した反射部の反射面の法線を光軸に対して傾斜させることで、正反射成分を拡散構造に入射させることができるので、光利用効率を向上させるために有効となる。   That is, when the light guided in the light guide member is incident on the reflection surface arranged on the end face from the normal direction, the specular reflection component is the direction opposite to the incident direction (the method of the reflection surface). Reflected in the line direction). Therefore, when the normal direction of the reflecting surface is parallel to the optical axis, the regular reflection component of the reflected light is not scattered by the diffusing structure, but is directly returned to the original light source again. In this case, the amount of light extracted outside the light guide member is reduced. In general, since the reflected light includes a diffusion component other than the regular reflection component, a part of the light reflected by the end face enters the diffusion structure and can be extracted. However, when the specular reflection component is large, it is possible to make the specular reflection component incident on the diffusing structure by inclining the normal line of the reflection surface of the reflection portion disposed on the end face with respect to the optical axis. This is effective for improving efficiency.

また、一実施形態の光源モジュールでは、上記導光部材の上記光取り出し面は、上記第１の入射面の法線方向の寸法が、上記光取り出し面の法線方向と上記第１の入射面の法線方向とに直交する奥行き方向の寸法よりも長い。   In the light source module of one embodiment, the light extraction surface of the light guide member has a dimension in a normal direction of the first incident surface, the normal direction of the light extraction surface and the first incident surface. Longer than the dimension in the depth direction perpendicular to the normal direction.

この実施形態によれば、上記導光部材の光取り出し面を、光軸方向に細長い形状にすることができ、一例としては線状光源モジュールとすることもできる。   According to this embodiment, the light extraction surface of the light guide member can be elongated in the optical axis direction, and as an example, a linear light source module can be provided.

また、一実施形態の光源モジュールでは、上記導光部材の上記光取り出し面は、
上記光取り出し面の法線方向と上記第１の入射面の法線方向とに直交する奥行き方向の寸法が、上記第１の入射面の法線方向の寸法以上である。 Moreover, in the light source module of one embodiment, the light extraction surface of the light guide member is
The dimension in the depth direction perpendicular to the normal direction of the light extraction surface and the normal direction of the first incident surface is equal to or larger than the dimension of the normal direction of the first incident surface.

この実施形態によれば、上記導光部材の光取り出し面を、上記奥行き方向の寸法を光軸方向の寸法以上にして、一例として面状光源モジュールとすることができる。   According to this embodiment, the light extraction surface of the light guide member can be a planar light source module as an example, with the dimension in the depth direction being equal to or greater than the dimension in the optical axis direction.

また、一実施形態の光源モジュールでは、上記第１、第２の光源は、発光素子である。   In one embodiment, the first and second light sources are light emitting elements.

この実施形態によれば、高信頼性,長寿命の光源となる。   According to this embodiment, the light source has a high reliability and a long lifetime.

また、一実施形態の光源モジュールでは、上記拡散構造は、上記光を拡散させる複数の拡散部を有し、
上記複数の拡散部は、上記導光部材の背面の光軸方向の両端から中央に向かって光軸方向の単位寸法当たりの個数が増加している。 Moreover, in the light source module of one embodiment, the diffusion structure includes a plurality of diffusion portions that diffuse the light,
The number of the plurality of diffusion portions per unit dimension in the optical axis direction increases from both ends in the optical axis direction on the back surface of the light guide member toward the center.

この実施形態によれば、上記導光部材の光取り出し面から取り出す光量を、上記導光部材の光軸方向において均一化できる。   According to this embodiment, the amount of light extracted from the light extraction surface of the light guide member can be made uniform in the optical axis direction of the light guide member.

また、一実施形態の光源モジュールでは、上記複数の拡散部は、
上記導光部材の上記背面の両端のうちの上記光源に近い方の端領域での光軸方向の単位寸法当たりの個数が、上記背面の両端のうちの上記光源から遠い方の端領域での光軸方向の単位寸法当たりの個数よりも少なくなっている。 In the light source module of one embodiment, the plurality of diffusion units are
The number per unit dimension in the optical axis direction in the end region closer to the light source of both ends of the back surface of the light guide member is the end region far from the light source of both ends of the back surface. The number is smaller than the number per unit dimension in the optical axis direction.

この実施形態によれば、上記背面の両端のうちで光源に遠い方の端領域において拡散部の密度が高くなっているので、上記光取り出し面の両端領域で取り出す光量を均一化できる。   According to this embodiment, since the density of the diffusing portion is high in the end region far from the light source among the both ends of the back surface, the amount of light extracted in the both end regions of the light extraction surface can be made uniform.

また、一実施形態の光源モジュールでは、上記光取り出し面に形成されていると共に上記第１,第２の入射面から入射した上記第１,第２の光源からの光を拡散させる拡散構造をさらに備えた。   In one embodiment, the light source module further includes a diffusing structure that is formed on the light extraction surface and diffuses light from the first and second light sources incident from the first and second incident surfaces. Prepared.

この実施形態によれば、上記導光部材の光取り出し面と背面の両方に光源からの光を拡散させる拡散構造を有するので、導光部材の背面だけに拡散構造を設けた場合に比べて、導光部材内に導光している光をより高効率で取り出すことができる。よって、光利用効率をさらに大きくすることが可能となる。   According to this embodiment, since it has a diffusion structure that diffuses light from the light source on both the light extraction surface and the back surface of the light guide member, compared to the case where the diffusion structure is provided only on the back surface of the light guide member, The light guided into the light guide member can be extracted with higher efficiency. Therefore, the light utilization efficiency can be further increased.

また、一実施形態の光源モジュールでは、上記第１の光源を上記導光部材の第１の入射面に取り付けると共に上記第１の光源による光を上記第１の入射面に導くための第１の結合部材と、
上記第２の光源を上記導光部材の第２の入射面に取り付けると共に上記第２の光源による光を上記第２の入射面に導くための第２の結合部材とを備えた。 In the light source module of one embodiment, the first light source is attached to the first incident surface of the light guide member, and the first light for guiding the light from the first light source to the first incident surface is provided. A coupling member;
The second light source is attached to a second incident surface of the light guide member, and a second coupling member is provided for guiding light from the second light source to the second incident surface.

この実施形態によれば、上記第１,第２の結合部材で上記第１,第２の光源を上記導光部材の第１,第２の端面に結合させて、第１,第２の光源からの光を第１,第２の入射面に導くことができる。   According to this embodiment, the first and second light sources are coupled to the first and second end faces of the light guide member by the first and second coupling members. Can be guided to the first and second incident surfaces.

また、一実施形態の照明装置では、上記光源モジュールを、複数または単数備えた。   Moreover, in the illuminating device of one Embodiment, the said light source module was provided with two or more.

この実施形態によれば、上記光源モジュールを備えたことで、より高効率な照明装置を実現することが可能となる。   According to this embodiment, by providing the light source module, it is possible to realize a more efficient lighting device.

この発明の光源モジュールによれば、上記第１の光源の光軸と上記第２の光源の光軸とが互いにずれている。これにより、上記第１,第２の光源から放射された光が拡散構造で拡散されずに光取り出し面から取り出されることなく、直接に上記導光部材の第２,第１の端面に達した場合に、上記第２,第１の端面のうちの第２,第１の入射面の隣りの領域に入射するようにできる。よって、上記第１,第２の光源からの光が第２,第１の入射面に対向する第２,第１の光源に入射することを抑制できる。そして、上記第１,第２の光源からの光を上記第２,第１の入射面に隣接する部分で反射させて導光部材内に戻すことができる。これにより、上記光取り出し面から効率的に光を取り出すことが可能となる。   According to the light source module of the present invention, the optical axis of the first light source and the optical axis of the second light source are shifted from each other. As a result, the light emitted from the first and second light sources reaches the second and first end surfaces of the light guide member directly without being diffused by the diffusion structure and extracted from the light extraction surface. In this case, the light can enter the region adjacent to the second and first incident surfaces of the second and first end surfaces. Therefore, it can suppress that the light from the said 1st, 2nd light source injects into the 2nd, 1st light source which opposes a 2nd, 1st incident surface. And the light from the said 1st, 2nd light source can be reflected in the part adjacent to the said 2nd, 1st entrance plane, and can be returned in a light guide member. Thereby, light can be efficiently extracted from the light extraction surface.

以下、この発明を図示の実施の形態により詳細に説明する。   Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

(第１の実施の形態)
図１の断面図に、この発明の光源モジュールの第１実施形態を示す。この第１実施形態は、導光部材１と、導光部材１の第１の端面１Ａに取り付けられた第１の結合部材３と、導光部材１の第２の端面１Ｂに取り付けられた第２の結合部材５と、上記導光部材１の背面１Ｃに形成された拡散構造６とを備える。 (First embodiment)
The first embodiment of the light source module of the present invention is shown in the sectional view of FIG. In the first embodiment, the light guide member 1, the first coupling member 3 attached to the first end face 1A of the light guide member 1, and the second end face 1B attached to the second end face 1B of the light guide member 1 are used. 2 coupling members 5, and a diffusion structure 6 formed on the back surface 1 </ b> C of the light guide member 1.

上記第１の結合部材３は、上記第１の端面１Ａの第１の入射面１Ａ‐１に対向する凹部７を有し、この凹部７の底面に第１の光源２が配置されている。また、上記凹部７の内側面７Ａは、第１の光源２の放射光を上記第１の入射面１Ａ‐１に向けて反射するリフレクタをなす。また、上記第２の結合部材５は、上記第２の端面１Ｂの第２の入射面１Ｂ‐１に対向する凹部８を有し、この凹部８の底面に第２の光源１２が配置されている。また、上記凹部８の内側面８Ａは、第２の光源１２の放射光を上記第２の入射面１Ｂ‐１に向けて反射するリフレクタをなす。なお、この実施形態では、上記第１,第２の光源２,１２を発光素子(ＬＥＤ)で構成した。また、この実施形態では、一例として上記凹部７,８の底面と内側面７Ａ,８Ａとのなす角度を１３５°としたが、上記角度は光源２,１２の種類や第１,第２の結合部材３,５の形状等に応じて適宜設定される。   The first coupling member 3 has a recess 7 facing the first incident surface 1A-1 of the first end surface 1A, and the first light source 2 is disposed on the bottom surface of the recess 7. The inner surface 7A of the recess 7 serves as a reflector that reflects the emitted light of the first light source 2 toward the first incident surface 1A-1. The second coupling member 5 has a recess 8 facing the second incident surface 1B-1 of the second end surface 1B, and a second light source 12 is disposed on the bottom surface of the recess 8. Yes. In addition, the inner side surface 8A of the concave portion 8 forms a reflector that reflects the emitted light of the second light source 12 toward the second incident surface 1B-1. In this embodiment, the first and second light sources 2 and 12 are constituted by light emitting elements (LEDs). In this embodiment, as an example, the angle formed between the bottom surfaces of the recesses 7 and 8 and the inner side surfaces 7A and 8A is 135 °. However, the angle depends on the type of the light sources 2 and 12 and the first and second couplings. It is appropriately set according to the shape of the members 3 and 5 and the like.

上記導光部材１は、第１の端面１Ａと第２の端面１Ｂとの間に位置していると共に上記第１,第２の入射面１Ａ‐１,１Ｂ‐１から入射した光を出射させる光取り出し面１Ｄを有し、上記背面１Ｃは、上記光取り出し面１Ｄが向いている方向とは反対方向を向いている。また、上記背面１Ｃと光取り出し面１Ｄとは略平行である。   The light guide member 1 is located between the first end surface 1A and the second end surface 1B and emits light incident from the first and second incident surfaces 1A-1, 1B-1. It has a light extraction surface 1D, and the back surface 1C faces in a direction opposite to the direction in which the light extraction surface 1D faces. The back surface 1C and the light extraction surface 1D are substantially parallel.

そして、上記第１の光源２の光軸Ｊ１と上記第２の光源１２の光軸Ｊ２とは、互いに上記導光部材１の光取り出し面１Ｄの法線方向にずれている。ここでは、一例として、光軸Ｊ１と光軸Ｊ２とのずれ寸法を、導光部材１の高さ寸法の２分の１としたが、上記ずれ寸法がこれに限らないのは勿論である。なお、上記高さ寸法とは、上記光取り出し面１Ｄの法線方向(図１のＹ方向)の寸法である。また、上記導光部材１の上記Ｙ方向の中心に対して光軸Ｊ１と光軸Ｊ２を同じ寸法だけずらしている。なお、図１において、両光軸Ｊ１,Ｊ２を上記高さ寸法の２分の１を超えてずらすと、第１,第２の結合部材３,５のリフレクタをなす内周面７Ａ,８Ａの直径寸法を減少させる、もしくは、上記導光部材１の上記高さ寸法を大きくする必要がある。しかし、上記リフレクタの直径寸法を小さくすると光源２,１２と導光部材１との間の光の結合係数が減少して光利用効率が低下する。一方、これを回避するために、上記導光部材１の高さ寸法を大きくすると光源モジュールの大型化を招くこととなる。したがって、上記光の結合係数の低下を回避しつつ大型化を避けるためには、光軸Ｊ１とＪ２との間の距離を上記導光部材１の高さ寸法の２分の１以下にすることが望ましい。   The optical axis J1 of the first light source 2 and the optical axis J2 of the second light source 12 are shifted from each other in the normal direction of the light extraction surface 1D of the light guide member 1. Here, as an example, the deviation dimension between the optical axis J1 and the optical axis J2 is set to one half of the height dimension of the light guide member 1, but the deviation dimension is not limited to this. The height dimension is a dimension in the normal direction (Y direction in FIG. 1) of the light extraction surface 1D. Further, the optical axis J1 and the optical axis J2 are shifted by the same dimension with respect to the center of the light guide member 1 in the Y direction. In FIG. 1, when both optical axes J1 and J2 are shifted beyond one half of the height, the inner peripheral surfaces 7A and 8A forming the reflectors of the first and second coupling members 3 and 5 are shown. It is necessary to reduce the diameter dimension or increase the height dimension of the light guide member 1. However, if the diameter dimension of the reflector is reduced, the light coupling coefficient between the light sources 2 and 12 and the light guide member 1 is reduced, and the light utilization efficiency is lowered. On the other hand, in order to avoid this, if the height dimension of the light guide member 1 is increased, the light source module is increased in size. Therefore, in order to avoid an increase in size while avoiding a decrease in the light coupling coefficient, the distance between the optical axes J1 and J2 should be less than or equal to half the height of the light guide member 1. Is desirable.

なお、この導光部材１の材料としては、例えばアクリル樹脂の他、ポリスチレン樹脂、メタクリル樹脂、ポリカーボネイト樹脂またはガラスなど、透明性が良く、透過率の大きなものを用いればよい。   The light guide member 1 may be made of a material having good transparency and high transmittance such as polystyrene resin, methacrylic resin, polycarbonate resin or glass in addition to acrylic resin.

また、上記拡散構造６は、光を拡散させる複数の拡散部６Ａを有し、上記複数の拡散部６Ａは、上記導光部材１の背面１Ｃの光軸方向の両端から中央に向かって光軸方向の単位寸法当たりの個数が増加している。なお、この実施形態では、上記拡散部６Ａとして、透明樹脂中に拡散微粒子を混ぜ合わせたものとした。各拡散部６Ａは、スクリーン印刷法によって、上記光取り出し面１Ｄの法線方向と上記第１の入射面１Ａ‐１の法線方向とに直交する奥行き方向に延在する線状にパターニングされて導光板１の背面１Ｃに形成されている。拡散構造６をなす各拡散部６Ａのパターン寸法は、ここでは一例として、幅が０.２ｍｍで、高さ０.０１ｍｍである。上記幅とは上記第１の入射面１Ａ‐１の法線方向寸法であり、上記高さとは上記背面１Ｃの法線方向の寸法である。なお、各拡散部６Ａのパターン寸法については、パターンを形成する方法、導光部材１の寸法などを考慮して決定すればよく、上記寸法以外のパターンを用いてもよいのは勿論である。   The diffusing structure 6 has a plurality of diffusing portions 6A for diffusing light, and the diffusing portions 6A have optical axes from both ends in the optical axis direction of the back surface 1C of the light guide member 1 toward the center. The number per unit dimension in the direction is increasing. In this embodiment, diffusion particles 6A are mixed in the transparent resin as the diffusion portion 6A. Each diffusion portion 6A is patterned by a screen printing method into a line extending in the depth direction perpendicular to the normal direction of the light extraction surface 1D and the normal direction of the first incident surface 1A-1. It is formed on the back surface 1 </ b> C of the light guide plate 1. As an example, the pattern dimensions of each diffusion portion 6A constituting the diffusion structure 6 are a width of 0.2 mm and a height of 0.01 mm. The width is a dimension in the normal direction of the first incident surface 1A-1, and the height is a dimension in the normal direction of the back surface 1C. Note that the pattern dimensions of each diffusion portion 6A may be determined in consideration of the method of forming the pattern, the dimensions of the light guide member 1, and the like, and it is needless to say that patterns other than the above dimensions may be used.

上記構成の光源モジュールでは、上記第１,第２の光源２,１２から放射された光は、第１,第２の入射面１Ａ‐１,１Ｂ‐１から導光部材１内に入射し、この導光部材１内において全反射を繰り返すことによって導光部材１内で導光されて行く。このとき、上記拡散構造６に入射した光は、拡散部６Ａで散乱され、この散乱によって全反射条件を満たさなくなった光は、光取り出し面１Ｄから出射されることとなる。   In the light source module having the above configuration, the light emitted from the first and second light sources 2 and 12 enters the light guide member 1 from the first and second incident surfaces 1A-1 and 1B-1, Light is guided in the light guide member 1 by repeating total reflection in the light guide member 1. At this time, the light incident on the diffusing structure 6 is scattered by the diffusing portion 6A, and the light that does not satisfy the total reflection condition due to the scattering is emitted from the light extraction surface 1D.

ここで、この実施形態では、上記第１の光源２の光軸Ｊ１と上記第２の光源１２の光軸Ｊ２とがずれている。これにより、上記第１,第２の光源２,１２から放射された光が拡散構造６で拡散されずに光取り出し面１Ｄから取り出されることなく、直接に上記導光部材１の第２,第１の端面１Ｂ,１Ａに達した場合に、上記第２,第１の端面１Ｂ,１Ａのうちの第２,第１の入射面１Ｂ‐１,１Ａ‐１の隣りの部分１Ｂ‐２,１Ａ‐２に入射するようにできる。よって、上記第１,第２の光源２,１２からの光が第２,第１の入射面１Ｂ‐１,１Ａ‐１に対向する第２,第１の光源１２,２に入射することを抑制できる。そして、上記第１,第２の光源２,１２からの光を上記第２,第１の入射面１Ｂ‐１,１Ａ‐１に隣接する部分１Ｂ‐２,１Ａ‐２で反射させて導光部材１内に戻すことができる。これにより、上記光取り出し面１Ｄから効率的に光を取り出すことが可能となる。   Here, in this embodiment, the optical axis J1 of the first light source 2 and the optical axis J2 of the second light source 12 are shifted. As a result, the light emitted from the first and second light sources 2 and 12 is not diffused by the diffusion structure 6 and is not extracted from the light extraction surface 1D, but directly from the second and second light guide members 1. When the first end faces 1B and 1A are reached, the adjacent portions 1B-2 and 1A of the second and first entrance faces 1B-1 and 1A-1 of the second and first end faces 1B and 1A -2 can be incident. Therefore, the light from the first and second light sources 2 and 12 is incident on the second and first light sources 12 and 2 facing the second and first incident surfaces 1B-1 and 1A-1. Can be suppressed. Then, light from the first and second light sources 2 and 12 is reflected by the portions 1B-2 and 1A-2 adjacent to the second and first incident surfaces 1B-1 and 1A-1 to guide the light. It can be returned into the member 1. Thereby, light can be efficiently extracted from the light extraction surface 1D.

特に、上記第１,第２の光源２,１２から光軸Ｊ１,Ｊ２の方向に放射される光はその強度も強く導光部材１内を直線的に進むことになる。したがって、光軸Ｊ１,Ｊ２の方向に放射された光は、従来例の様に光軸をずらしていない場合はそのまま第２,第１の端面に配置された第２,第１の光源に入射することになる。   In particular, the light emitted from the first and second light sources 2 and 12 in the direction of the optical axes J1 and J2 has a strong intensity and travels linearly in the light guide member 1. Therefore, the light emitted in the directions of the optical axes J1 and J2 is incident on the second and first light sources arranged on the second and first end faces as long as the optical axis is not shifted as in the conventional example. Will do.

これに対し、本実施形態においては、第１,第２の光源２,１２の光軸Ｊ１,Ｊ２をずらして配置しているので、第１,第２の光源２,１２からの光は第２,第１の光源１２,２に入射することなく、第２,第１の端面１Ｂ,１Ａで反射されて導光部材１内で再び導光されることになる。この再び導光部材１内に戻された反射光は一般的に正反射成分以外に拡散成分が含まれる。よって、上記端面１Ｂ,１Ａで導光部材１内に反射された反射光は、上記拡散構造６で散乱されることになり、上記導光部材１の光取り出し面１Ｄから外に取り出すことができる。よって、光利用効率を大きくすることが可能となる。   On the other hand, in the present embodiment, since the optical axes J1 and J2 of the first and second light sources 2 and 12 are arranged to be shifted, the light from the first and second light sources 2 and 12 is the first light. 2. The light is reflected by the second and first end faces 1B and 1A without being incident on the first light sources 12 and 2, and is guided again in the light guide member 1. The reflected light returned into the light guide member 1 generally includes a diffusion component in addition to the regular reflection component. Therefore, the reflected light reflected in the light guide member 1 by the end surfaces 1B and 1A is scattered by the diffusion structure 6 and can be taken out from the light extraction surface 1D of the light guide member 1. . Therefore, the light use efficiency can be increased.

また、この実施形態では、上記第１の光源２の光軸Ｊ１と第２の光源１２の光軸Ｊ２とを、第１,第２の端面１Ａ,１Ｂの上記高さ方向Ｙの中央を通り上記光取り出し面１Ｄ,背面１Ｃと平行な中央面Ｓ１に対して対称的に配置している。したがって、上記第１,第２の光源２,１２から第１,第２の入射面１Ａ‐１,１Ｂ‐１に入射した光は上記中央面Ｓ１に対して対称的に導光されて、拡散構造６で散乱され、光取り出し面１Ｄから取り出される。   In this embodiment, the optical axis J1 of the first light source 2 and the optical axis J2 of the second light source 12 pass through the center in the height direction Y of the first and second end faces 1A and 1B. The light extraction surface 1D and the rear surface 1C are arranged symmetrically with respect to the central surface S1. Accordingly, light incident on the first and second incident surfaces 1A-1 and 1B-1 from the first and second light sources 2 and 12 is guided symmetrically with respect to the central surface S1 and diffused. Scattered by the structure 6 and extracted from the light extraction surface 1D.

なお、この実施形態では、上記導光部材１の寸法を、一例として、幅を６ｍｍとし、高さを１０ｍｍとし、長さを３００ｍｍとした。上記幅とは、上記光取り出し面１Ｄの法線方向と上記第１の入射面１Ａ‐１の法線方向とに直交する奥行き方向(図１のＺ方向)の寸法であり、上記高さとは、上記光取り出し面１Ｄの法線方向(図１のＹ方向)の寸法であり、上記長さとは、上記第１の入射面１Ａ‐１の法線方向(図１のＸ方向)の寸法である。この一例では、上記導光部材１の上記光取り出し面１Ｄは、上記第１の入射面１Ａ‐１の法線方向の寸法が、奥行き方向(Ｚ方向)の寸法よりも長いので、光取り出し面１Ｄを光軸方向に細長い形状にすることができ、一例として線状光源モジュールとすることができる。一方、上記導光部材１の上記光取り出し面１Ｄの上記奥行き方向(Ｚ)の寸法を、上記第１の入射面１Ａ‐１の法線方向(Ｘ)の寸法以上にしてもよい。この場合、一例として面状光源モジュールとすることができる。   In this embodiment, as an example, the light guide member 1 has a width of 6 mm, a height of 10 mm, and a length of 300 mm. The width is a dimension in the depth direction (Z direction in FIG. 1) perpendicular to the normal direction of the light extraction surface 1D and the normal direction of the first incident surface 1A-1, and the height is , The dimension in the normal direction (Y direction in FIG. 1) of the light extraction surface 1D, and the length is the dimension in the normal direction (X direction in FIG. 1) of the first incident surface 1A-1. is there. In this example, the light extraction surface 1D of the light guide member 1 has a light-extraction surface because the dimension in the normal direction of the first incident surface 1A-1 is longer than the dimension in the depth direction (Z direction). 1D can be elongated in the direction of the optical axis, and can be a linear light source module as an example. On the other hand, the dimension in the depth direction (Z) of the light extraction surface 1D of the light guide member 1 may be greater than or equal to the dimension in the normal direction (X) of the first incident surface 1A-1. In this case, it can be set as a planar light source module as an example.

また、この実施形態では、図１に示されるように、上記第１の光源２の光軸Ｊ１と第２の光源１２の光軸Ｊ２とが、導光部材１の光取り出し面１Ｄの法線方向(Ｙ)にずれているので、光取り出し面１Ｄの奥行方向(Ｚ)のサイズの縮小を図れる。一方、第１の光源２の光軸Ｊ１と第２の光源１２の光軸Ｊ２とが、上記導光部材１の光取り出し面１Ｄの法線方向(Ｙ)と上記第１の入射面１Ａ‐１の法線方向(Ｘ)とに直交する奥行き方向(Ｚ)にずらしてもよい。この場合、上記第１の光源２の光軸Ｊ１と上記第２の光源１２の光軸Ｊ２とが導光部材１の光取り出し面１Ｄの法線方向(Ｙ)にずれている場合に比べて、光取り出し方向の薄型化を図れる。また、上記光軸Ｊ１と光軸Ｊ２を、導光部材１の光取り出し面１Ｄの法線方向と上記奥行き方向の両方にずらしてもよい。   In this embodiment, as shown in FIG. 1, the optical axis J1 of the first light source 2 and the optical axis J2 of the second light source 12 are normal to the light extraction surface 1D of the light guide member 1. Since the displacement is in the direction (Y), the size of the light extraction surface 1D in the depth direction (Z) can be reduced. On the other hand, the optical axis J1 of the first light source 2 and the optical axis J2 of the second light source 12 are in the normal direction (Y) of the light extraction surface 1D of the light guide member 1 and the first incident surface 1A-. You may shift to the depth direction (Z) orthogonal to the normal direction (X) of 1. In this case, the optical axis J1 of the first light source 2 and the optical axis J2 of the second light source 12 are shifted in the normal direction (Y) of the light extraction surface 1D of the light guide member 1. Therefore, the light extraction direction can be reduced. The optical axis J1 and the optical axis J2 may be shifted both in the normal direction of the light extraction surface 1D of the light guide member 1 and in the depth direction.

次に、図３を参照して、上記実施形態における上記拡散構造６の拡散部６Ａの上記第１の入射面１Ａ‐１の法線方向(図１のＸ方向)の配列ピッチＰの上記Ｘ方向の分布の一例を説明する。図３において横軸は導光部材１のＸ方向の中央からの距離を表し、縦軸は上記配列ピッチＰを表している。   Next, with reference to FIG. 3, the X of the arrangement pitch P in the normal direction (X direction of FIG. 1) of the first incident surface 1A-1 of the diffusion portion 6A of the diffusion structure 6 in the embodiment. An example of the direction distribution will be described. In FIG. 3, the horizontal axis represents the distance from the center of the light guide member 1 in the X direction, and the vertical axis represents the arrangement pitch P.

図３に実線で示す曲線Ｋ１が上記実施形態における拡散部６Ａの配列ピッチの分布の一例であり、図３に破線で示す曲線Ｋ２は比較例における拡散部の配列ピッチの分布の一例である。この比較例は、図１の導光部材１の両端の第１,第２の光源２,１２のうちの第１の光源２だけを備えたものである。図３の曲線Ｋ１に示すように本実施形態では、導光部材１のＸ方向の中央で拡散部６Ａの配列ピッチが最も小さく、導光部材１の中央からＸ方向の両端に向かって拡散部６Ａの配列ピッチが増大している。一方、図３の曲線Ｋ２に示すように上記比較例では、導光部材１のＸ方向の光源が配置されていない一端からＸ方向の他端に向かって拡散部の配列ピッチが増大している。図３の曲線Ｋ２に示すように、片側のみに光源を配置した上記比較例では、光源に近い位置ほど取り出し光量が多くなるといった取り出し光量の不均一さを防ぐために、光源を配置した側の配列ピッチを広くしている。このため、上記比較例では、拡散部の個数が上記実施形態に比べて少なくなり、光利用効率を大きくする場合の制約となる。よって、拡散部の個数を増やして光利用効率を大きくするには、この実施形態のように導光部材１の両端面１Ａ,１Ｂに光源２,１２を配置することが望ましいといえる。   A curve K1 indicated by a solid line in FIG. 3 is an example of the distribution of arrangement pitches of the diffusion sections 6A in the above embodiment, and a curve K2 indicated by a broken line in FIG. 3 is an example of the distribution of arrangement pitches of the diffusion sections in the comparative example. In this comparative example, only the first light source 2 of the first and second light sources 2 and 12 at both ends of the light guide member 1 of FIG. 1 is provided. As shown by the curve K1 in FIG. 3, in this embodiment, the arrangement pitch of the diffusion portions 6A is the smallest at the center in the X direction of the light guide member 1, and the diffusion portions from the center of the light guide member 1 toward both ends in the X direction The arrangement pitch of 6A is increasing. On the other hand, as shown by the curve K2 in FIG. 3, in the comparative example, the arrangement pitch of the diffusion portions increases from one end where the light source in the X direction of the light guide member 1 is not arranged to the other end in the X direction. . As shown by the curve K2 in FIG. 3, in the comparative example in which the light source is arranged only on one side, the arrangement on the side where the light source is arranged in order to prevent non-uniformity in the extracted light amount such that the extracted light amount increases at a position closer to the light source. The pitch is widened. For this reason, in the comparative example described above, the number of diffusing parts is reduced as compared with the above-described embodiment, which is a limitation when the light utilization efficiency is increased. Therefore, in order to increase the number of diffusion parts and increase the light utilization efficiency, it can be said that it is desirable to arrange the light sources 2 and 12 on both end faces 1A and 1B of the light guide member 1 as in this embodiment.

なお、上記第１実施形態では、図１に示すように、導光部材１の背面１Ｃだけに拡散構造６を形成したが、図２に示す変形例のように、導光部材１の光取り出し面１Ｄにも拡散構造１６を形成してもよい。この拡散構造１６は、上記拡散構造６と同様に、複数の拡散部１６Ａを有し、光取り出し面１Ｄの光軸方向の両端から中央に向かって光軸方向の単位寸法当たりの個数が増加している。また、各拡散部１６Ａの構成は、上記拡散構造６をなす各拡散部６Ａと同様の構成とした。この変形例によれば、導光部材１における拡散部の密度を大きくすることが可能であり、光取り出し面１Ｄで取り出すことのできる光量が増加する。すなわち、光利用効率を大きくすることができる。   In the first embodiment, the diffusion structure 6 is formed only on the back surface 1C of the light guide member 1 as shown in FIG. 1, but the light extraction of the light guide member 1 is performed as in the modification shown in FIG. The diffusion structure 16 may also be formed on the surface 1D. Similar to the diffusion structure 6, the diffusion structure 16 includes a plurality of diffusion portions 16A, and the number of light extraction surfaces 1D per unit dimension in the optical axis direction increases from both ends in the optical axis direction toward the center. ing. The configuration of each diffusing portion 16A is the same as that of each diffusing portion 6A forming the diffusing structure 6. According to this modification, it is possible to increase the density of the diffusion portions in the light guide member 1, and the amount of light that can be extracted by the light extraction surface 1D increases. That is, the light use efficiency can be increased.

図７の表に示すように、図１に示す第１実施形態の光利用効率をシミュレートした結果は、６９.１％であった。これに対して、上記第１実施形態の変形例(図２)をシミュレートした結果は、７８.７％であった。この光利用効率は、導光部材から放射される光量を光源から放射される光量で除算した値である。なお、図７の第１比較例の欄に示す光利用効率は、図１の第１実施形態において導光部材１の両端の第１,第２の光源２,１２のうちの第１の光源２だけを備えた光源モジュールの光利用効率であり、６２.９％であった。また、図７の第２比較例の欄に示す光利用効率は、図８に示すように、第１の光源８１の光軸と第２の光源８２の光軸とがずれていなく一致している光源モジュールの光利用効率であり、６５.４％であった。この第２比較例は、図１の第１実施形態と同様の導光部材１と拡散構造６を有する。図７に示す光利用効率のシミュレート結果からわかるように、第１実施形態およびその変形例によれば、第１,第２比較例に比べて光利用効率を向上させることができた。   As shown in the table of FIG. 7, the result of simulating the light utilization efficiency of the first embodiment shown in FIG. 1 was 69.1%. On the other hand, the simulation result of the modified example (FIG. 2) of the first embodiment was 78.7%. This light utilization efficiency is a value obtained by dividing the amount of light emitted from the light guide member by the amount of light emitted from the light source. The light use efficiency shown in the column of the first comparative example in FIG. 7 is the first light source of the first and second light sources 2 and 12 at both ends of the light guide member 1 in the first embodiment of FIG. The light use efficiency of the light source module having only 2 was 62.9%. Further, the light use efficiency shown in the column of the second comparative example in FIG. 7 matches the optical axis of the first light source 81 and the optical axis of the second light source 82 as shown in FIG. The light utilization efficiency of the light source module is 65.4%. The second comparative example includes the light guide member 1 and the diffusion structure 6 similar to those of the first embodiment of FIG. As can be seen from the simulation result of the light utilization efficiency shown in FIG. 7, according to the first embodiment and the modification thereof, the light utilization efficiency can be improved as compared with the first and second comparative examples.

また、図１の第１実施形態に比べて図２の変形例の方が光利用効率が高いのは、前述のように、導光部材１の光取り出し面１Ｄと背面１Ｃの両方に拡散構造６,１６を形成したからである。すなわち、この両面の拡散構造６,１６により、光の取出し効率(＝導光部材の外部に取り出した光量÷光源から導光部材に結合した光量)を大きくすることができ、これにより、光利用効率についても大きくすることが可能となるためである。なお、この光の取出し効率とは、導光部材の外部に取り出した光量を、光源から導光部材に結合した光量で除算した値である。   2 has a higher light utilization efficiency than the first embodiment of FIG. 1, as described above, the diffusion structure is formed on both the light extraction surface 1D and the back surface 1C of the light guide member 1. This is because 6,16 are formed. In other words, the light diffusion efficiency (= the amount of light extracted outside the light guide member / the amount of light combined from the light source to the light guide member) can be increased by the diffusion structures 6 and 16 on both sides, thereby making it possible to use light. This is because the efficiency can be increased. The light extraction efficiency is a value obtained by dividing the amount of light extracted outside the light guide member by the amount of light combined from the light source to the light guide member.

尚、上記第１実施形態において、上記導光部材１の背面１Ｃに対向する反射面を有する反射板を備えてもよい。この場合は、上記導光部材１の背面１Ｃから出てきた光を上記反射板の反射面で反射して上記導光部材１内に戻すことができるので、光取り出し面１Ｄの照度の向上を図れる。また、上記第１実施形態では、第１,第２の光源２,１２を発光ダイオードで構成したが、発光ダイオードに替えてレーザダイオードで構成してもよく、さらに、それ以外の発光素子としてもよい。また、上記第１実施形態では、拡散構造６の拡散部６Ａの密度(光軸方向の単位寸法当たりの個数)に関して、背面１Ｃの光軸方向の中央から第１の光源２側の端にかけての密度変化と、背面１Ｃの光軸方向の中央から第２の光源１２側の端にかけての密度変化とを同様にしたが、上記背面１Ｃのうちの上記第１の光源２側の端の領域での密度を背面１Ｃのうちの第２の光源１２側の端の領域での密度よりも高くしてもよい。この場合、上記背面１Ｃの両端のうちで光源に遠い方の端領域である第１の光源２側の端の領域において拡散部６Ａの密度が高くなっているので、上記光取り出し面１Ｄの両端領域で取り出す光量の均一化を図れる。   In addition, in the said 1st Embodiment, you may provide the reflecting plate which has a reflective surface facing the back surface 1C of the said light guide member 1. FIG. In this case, the light emitted from the back surface 1C of the light guide member 1 can be reflected by the reflection surface of the reflector and returned to the light guide member 1, thereby improving the illuminance of the light extraction surface 1D. I can plan. Moreover, in the said 1st Embodiment, although the 1st, 2nd light source 2 and 12 was comprised by the light emitting diode, it may replace with a light emitting diode and may comprise a laser diode, and also as other light emitting elements. Good. In the first embodiment, the density (the number per unit dimension in the optical axis direction) of the diffusing portion 6A of the diffusing structure 6 extends from the center of the back surface 1C in the optical axis direction to the end on the first light source 2 side. The density change and the density change from the center of the back surface 1C in the optical axis direction to the end on the second light source 12 side are the same, but in the region of the back surface 1C on the end of the first light source 2 side. May be higher than the density in the region at the end of the back surface 1C on the second light source 12 side. In this case, since the density of the diffusion portion 6A is high in the end region on the first light source 2 side that is the end region far from the light source among the both ends of the back surface 1C, both ends of the light extraction surface 1D The amount of light extracted in the region can be made uniform.

また、上記第１実施形態および変形例の光源モジュールは、液晶テレビ用のバックライト,コピー機,スキャナなどに用いられる画像読み取り用光源、コピー機,プリンタなど感光体上の電荷を光により制御する除電用の光源、インテリア用薄型光源、誘導灯など、その他の光源装置に幅広く用いることができる。   The light source modules of the first embodiment and the modified example control light on a photoconductor such as a light source for image reading, a copying machine, and a printer used in a backlight, a copying machine, and a scanner for a liquid crystal television by light. It can be widely used for other light source devices such as a light source for static elimination, a thin light source for interiors, and a guide light.

（第２の実施の形態)
次に、図４に、この発明の光源モジュールの第２実施形態の断面を示す。この第２実施形態は、図１の第１,第２の結合部材３,５に替えて第１,第２の結合部材２３,２５および第１,第２の反射部２７,２８を備える点だけが前述の第１実施形態と異なる。よって、この第２実施形態では、前述の第１実施形態と同様の部分には同様の符号を付して、前述の第１実施形態とは異なる点を主に説明する。 (Second Embodiment)
Next, FIG. 4 shows a cross section of a second embodiment of the light source module of the present invention. The second embodiment includes first and second coupling members 23 and 25 and first and second reflecting portions 27 and 28 in place of the first and second coupling members 3 and 5 in FIG. Only differs from the first embodiment described above. Therefore, in the second embodiment, the same parts as those in the first embodiment described above are denoted by the same reference numerals, and different points from the first embodiment will be mainly described.

この第２実施形態では、図４に示すように、第１,第２の結合部材２３,２５の構造は、図１の第１,第２の結合部材３,５の中央面Ｓ１よりも第１,第２の光源２,１２側の部分と同様の構造である。そして、中央面Ｓ１に対して上記第１,第２の結合部材２３,２５の反対側に第２,第１の反射部２８,２７が配置されている。すなわち、上記第１の反射部２７は、上記第１の光源２の光軸Ｊ１の延長線上にあると共に上記第２の入射面１Ｂ‐１の隣りに位置する上記導光部材１の部分１Ｂ‐２を覆っている。また、上記第２の反射部２８は、上記第２の光源１２の光軸Ｊ２の延長線上にあると共に上記第１の入射面１Ａ‐１の隣りに位置する上記導光部材１の部分１Ａ‐２を覆っている。   In the second embodiment, as shown in FIG. 4, the structure of the first and second coupling members 23 and 25 is greater than the center plane S1 of the first and second coupling members 3 and 5 in FIG. The structure is the same as that of the first and second light sources 2 and 12 side. And the 2nd, 1st reflection parts 28 and 27 are arrange | positioned on the opposite side of the said 1st, 2nd coupling members 23 and 25 with respect to center plane S1. That is, the first reflecting portion 27 is located on the extension line of the optical axis J1 of the first light source 2 and the portion 1B- of the light guide member 1 located next to the second incident surface 1B-1. 2 is covered. Further, the second reflecting portion 28 is on the extension line of the optical axis J2 of the second light source 12, and the portion 1A- of the light guide member 1 located next to the first incident surface 1A-1. 2 is covered.

上記第１,第２の反射部２７,２８は、上記第１，第２の結合部材２３,２５よりも大きな反射率を有する材料で作製されている。この第２実施形態では、一例として、上記第１,第２の反射部２７,２８を９５％の反射率を有する高反射率ポリカーボネイトで作製した。なお、上記第１,第２の反射部２７,２８を構成する反射部材としては、反射率が大きければよく、高反射率ポリカーボネイト以外の反射部材を用いてもよい。   The first and second reflecting portions 27 and 28 are made of a material having a higher reflectance than the first and second coupling members 23 and 25. In the second embodiment, as an example, the first and second reflecting portions 27 and 28 are made of high reflectance polycarbonate having a reflectance of 95%. In addition, as a reflection member which comprises the said 1st, 2nd reflection parts 27 and 28, a reflectance should just be large, and reflection members other than a high reflectance polycarbonate may be used.

この第２実施形態によれば、上記第１,第２の光源２,１２から上記第１,第２の入射面１Ａ‐１,１Ｂ‐１に入射して導光部材１内を通って上記第２,第１の入射面１Ｂ‐１,１Ａ‐１の隣りに位置する第１,第２の反射部２７,２８に入射した光は、上記第１,第２の反射部２７,２８で反射されて導光部材１内に効率よく戻すことができる。したがって、導光部材１の第１,第２の端面１Ａ,１Ｂでの反射光の利用効率を向上でき、光利用効率を向上できる。   According to the second embodiment, the first and second light sources 2 and 12 enter the first and second incident surfaces 1A-1 and 1B-1 and pass through the light guide member 1 to The light incident on the first and second reflecting portions 27 and 28 located adjacent to the second and first incident surfaces 1B-1 and 1A-1 is transmitted by the first and second reflecting portions 27 and 28. It is reflected and can be efficiently returned into the light guide member 1. Therefore, the utilization efficiency of the reflected light at the first and second end faces 1A and 1B of the light guide member 1 can be improved, and the light utilization efficiency can be improved.

尚、上記第２実施形態において、図４に示すように、導光部材１の背面１Ｃだけに拡散構造６を形成したが、図５に示す第１変形例のように、導光部材１の光取り出し面１Ｄにも拡散構造１６を形成してもよい。この拡散構造１６は、上記拡散構造６と同様に、複数の拡散部１６Ａを有し、光取り出し面１Ｄの光軸方向の両端から中央に向かって光軸方向の単位寸法当たりの個数が増加している。また、各拡散部１６Ａの構成は、上記拡散構造６をなす各拡散部６Ａと同様の構成とした。この第１変形例によれば、導光部材１における拡散部の密度を大きくすることが可能であり、光取り出し面１Ｄで取り出すことのできる光量が増加する。すなわち、光利用効率を大きくすることができる。   In the second embodiment, as shown in FIG. 4, the diffusion structure 6 is formed only on the back surface 1 </ b> C of the light guide member 1. However, as in the first modification shown in FIG. The diffusion structure 16 may also be formed on the light extraction surface 1D. Similar to the diffusion structure 6, the diffusion structure 16 includes a plurality of diffusion portions 16A, and the number of light extraction surfaces 1D per unit dimension in the optical axis direction increases from both ends in the optical axis direction toward the center. ing. The configuration of each diffusing portion 16A is the same as that of each diffusing portion 6A forming the diffusing structure 6. According to the first modification, the density of the diffusion portions in the light guide member 1 can be increased, and the amount of light that can be extracted by the light extraction surface 1D is increased. That is, the light use efficiency can be increased.

図７に示すシミュレーション結果では、図４に示した第２実施形態の光源モジュールによれば、７３.４％の光利用効率が得られた。また、図５に示した第１変形例によれば、図７に示すように、７３.４％の光利用効率が得られた。このように、第１,第２の反射部２７,２８を備えた第２実施形態とその変形例によれば、前述の第１実施形態よりも光利用効率を向上できる。   In the simulation result shown in FIG. 7, the light use efficiency of 73.4% was obtained according to the light source module of the second embodiment shown in FIG. Further, according to the first modification shown in FIG. 5, the light utilization efficiency of 73.4% was obtained as shown in FIG. As described above, according to the second embodiment including the first and second reflecting portions 27 and 28 and the modification thereof, the light use efficiency can be improved as compared with the first embodiment.

また、図６に、上記第２実施形態の第２変形例を示す。この第２変形例は、導光部材１に替えて導光部材３１を備えた点が、図４の第２実施形態と異なる。この第２変形例が備える導光部材３１は、上記第１,第２の反射部２７,２８が覆う箇所が面取りされている。すなわち、第２の反射部２８は、第１の入射面３１Ａ‐１から傾いた部分３１Ａ‐２を覆っており、第１の反射部２７は、第２の入射面３１Ｂ‐１から傾いた部分３１Ｂ‐２を覆っている。そして、上記第１の反射部２７の反射面２７Ａの法線は上記第１の光源２の光軸Ｊ１に対して傾斜しており、上記第２の反射部２８の反射面２８Ａの法線は上記第２の光源１２の光軸Ｊ２に対して傾斜している。   FIG. 6 shows a second modification of the second embodiment. The second modification differs from the second embodiment of FIG. 4 in that a light guide member 31 is provided instead of the light guide member 1. In the light guide member 31 provided in the second modification, the portions covered by the first and second reflecting portions 27 and 28 are chamfered. That is, the second reflecting portion 28 covers a portion 31A-2 inclined from the first incident surface 31A-1, and the first reflecting portion 27 is a portion inclined from the second incident surface 31B-1. It covers 31B-2. The normal line of the reflection surface 27A of the first reflection unit 27 is inclined with respect to the optical axis J1 of the first light source 2, and the normal line of the reflection surface 28A of the second reflection unit 28 is It is inclined with respect to the optical axis J2 of the second light source 12.

したがって、図６の第２変形例によれば、第１,第２の光源２,１２からの光を上記第１,第２の反射部２７,２８の傾斜した反射面２７Ａ,２８Ａで上記導光部材３１の背面３１Ｃ,光取り出し面３１Ｄに向けて反射できる。よって、上記反射面２７Ａ,２８Ａで反射した光が第１,第２の光源２,１２に向かって戻らないようにして、光利用効率を向上できる。すなわち、この第２変形例によれば、第１,第２の結合部材２３,２５に隣接する第２,第１の反射部２８,２７でもって、第２,第１の光源１２,２から光軸方向に放射されてきた光を拡散構造６で散乱され易いように反射させることが可能となる。よって、より光利用効率を向上させることが可能となる。   Therefore, according to the second modification of FIG. 6, the light from the first and second light sources 2 and 12 is guided by the inclined reflecting surfaces 27A and 28A of the first and second reflecting portions 27 and 28. The light can be reflected toward the back surface 31C and the light extraction surface 31D of the optical member 31. Therefore, the light utilization efficiency can be improved by preventing the light reflected by the reflection surfaces 27A and 28A from returning toward the first and second light sources 2 and 12. That is, according to the second modification, the second and first light sources 12 and 2 have the second and first reflecting portions 28 and 27 adjacent to the first and second coupling members 23 and 25, respectively. Light emitted in the direction of the optical axis can be reflected so as to be easily scattered by the diffusion structure 6. Therefore, the light utilization efficiency can be further improved.

また、上記第２実施形態および変形例の光源モジュールは、液晶テレビ用のバックライト,コピー機,スキャナなどに用いられる画像読み取り用光源、コピー機,プリンタなど感光体上の電荷を光により制御する除電用の光源、インテリア用薄型光源、誘導灯など、その他の光源装置に幅広く用いることができる。   The light source modules according to the second embodiment and the modified example control light on a photoconductor such as a light source for image reading, a copying machine, and a printer used for a backlight, a copying machine, a scanner, etc. for a liquid crystal television by light. It can be widely used for other light source devices such as a light source for static elimination, a thin light source for interiors, and a guide light.

尚、上記第１,第２の実施形態およびその変形例では、第１の光源２の光軸Ｊ１と第２の光源１２の光軸Ｊ２とが平行な状態で光軸Ｊ１と光軸Ｊ２とを互いにずらしたが、第１の光源２の光軸Ｊ１に対して第２の光源１２の光軸Ｊ２が互いに傾いていてもよい。   In the first and second embodiments and the modifications thereof, the optical axis J1 and the optical axis J2 are in a state where the optical axis J1 of the first light source 2 and the optical axis J2 of the second light source 12 are parallel to each other. However, the optical axes J2 of the second light sources 12 may be inclined with respect to the optical axis J1 of the first light sources 2.

この発明は、液晶テレビ用のバックライト,コピー機,スキャナなどに用いられる画像読み取り用光源、コピー機,プリンタなど感光体上の電荷を光により制御する除電用の光源、インテリア用薄型光源、誘導灯など、その他の光源装置に幅広く用いることができる。   The present invention relates to a light source for image reading used in backlights, copiers, and scanners for liquid crystal televisions, a light source for static elimination that controls charges on photoconductors such as copiers, printers, etc., a thin light source for interiors, an induction It can be widely used for other light source devices such as a lamp.

この発明の光源モジュールの第１実施形態を示す断面図である。It is sectional drawing which shows 1st Embodiment of the light source module of this invention. 上記第１実施形態の変形例を示す断面図である。It is sectional drawing which shows the modification of the said 1st Embodiment. 上記第１実施形態の拡散構造の配列ピッチ分布を示すグラフである。It is a graph which shows the arrangement | sequence pitch distribution of the diffusion structure of the said 1st Embodiment. この発明の光源モジュールの第２実施形態を示す断面図である。It is sectional drawing which shows 2nd Embodiment of the light source module of this invention. 上記第２実施形態の第１変形例を示す断面図である。It is sectional drawing which shows the 1st modification of the said 2nd Embodiment. 上記第２実施形態の第２変形例を示す断面図である。It is sectional drawing which shows the 2nd modification of the said 2nd Embodiment. 上記第１,第２実施形態とその変形例および第１,第２比較例の光利用効率のシミュレーション結果の一覧表を示す図である。It is a figure which shows the table | surface of the simulation result of the light utilization efficiency of the said 1st, 2nd embodiment, its modification, and a 1st, 2nd comparative example. 上記第２比較例を示す断面図である。It is sectional drawing which shows the said 2nd comparative example. 従来例の光源モジュールを示す断面図である。It is sectional drawing which shows the light source module of a prior art example.

符号の説明Explanation of symbols

１,３１ 導光部材
１Ａ 第１の端面
１Ａ‐１,３１Ａ‐１ 第１の入射面
１Ａ‐２ 隣接する部分
１Ｂ 第２の端面
１Ｂ‐１,３１Ｂ‐１ 第２の入射面
１Ｂ‐２ 隣接する部分
１Ｃ 背面
１Ｄ 光取り出し面
２ 第１の光源
３,２３ 第１の結合部材
５,２５ 第２の結合部材
６,１６ 拡散構造
６Ａ 拡散部
７,８ 凹部
Ｊ１,Ｊ２ 光軸
Ｓ１ 中央面
２７ 第１の反射部
２８ 第２の反射部 DESCRIPTION OF SYMBOLS 1,31 Light guide member 1A 1st end surface 1A-1, 31A-1 1st entrance surface 1A-2 Adjacent part 1B 2nd end surface 1B-1, 31B-1 2nd entrance surface 1B-2 Adjacent 1C Back surface 1D Light extraction surface 2 First light source 3, 23 First coupling member 5, 25 Second coupling member 6, 16 Diffusion structure 6A Diffusion portion 7, 8 Recess J1, J2 Optical axis S1 Central surface 27 First reflection unit 28 Second reflection unit

Claims (13)

第１の光源と、
第２の光源と、
上記第１の光源から光が入射する第１の入射面を含む第１の端面と、上記第１の端面とは反対側の端面をなすと共に上記第２の光源から光が入射する第２の入射面を含む第２の端面と、上記第１の端面と第２の端面との間に位置していると共に上記第１,第２の入射面から入射した光を出射させる光取り出し面と、上記第１の端面と第２の端面との間に位置していると共に上記光取り出し面が向いている方向とは反対方向を向いている背面とを含む導光部材と、
上記背面に形成されていると共に上記第１,第２の入射面から入射した上記第１,第２の光源からの光を拡散させる拡散構造と
を備え、
上記第１の光源は上記第１の入射面に対向して配置されていると共に上記第２の光源は上記第２の入射面に対向して配置されており、
上記第１の光源の光軸と上記第２の光源の光軸とが互いにずれていることを特徴とする光源モジュール。 A first light source;
A second light source;
A first end surface including a first incident surface on which light is incident from the first light source and an end surface opposite to the first end surface, and a second light on which light is incident from the second light source A second end surface including an incident surface; a light extraction surface that is located between the first end surface and the second end surface and emits light incident from the first and second incident surfaces; A light guide member including a back surface positioned between the first end surface and the second end surface and facing a direction opposite to the direction in which the light extraction surface is facing;
A diffusion structure formed on the back surface and diffusing light from the first and second light sources incident from the first and second incident surfaces;
The first light source is disposed to face the first incident surface, and the second light source is disposed to face the second incident surface.
The light source module, wherein an optical axis of the first light source and an optical axis of the second light source are shifted from each other. 請求項１に記載の光源モジュールにおいて、
上記第１の光源の光軸と上記第２の光源の光軸とが、上記導光部材の光取り出し面の法線方向に互いにずれていることを特徴とする光源モジュール。 The light source module according to claim 1,
The light source module, wherein an optical axis of the first light source and an optical axis of the second light source are shifted from each other in a normal direction of a light extraction surface of the light guide member. 請求項１または２に記載の光源モジュールにおいて、
上記第１の光源の光軸と上記第２の光源の光軸とが、上記導光部材の光取り出し面の法線方向と上記第１の入射面の法線方向とに直交する奥行き方向に互いにずれていることを特徴とする光源モジュール。 The light source module according to claim 1 or 2,
The optical axis of the first light source and the optical axis of the second light source are in the depth direction perpendicular to the normal direction of the light extraction surface of the light guide member and the normal direction of the first incident surface. A light source module characterized by being shifted from each other. 請求項１から３のいずれか１つに記載の光源モジュールにおいて、
上記第１の光源の光軸の延長線上にあると共に上記第２の入射面の隣りに位置する上記導光部材の箇所に配置した第１の反射部と、上記第２の光源の光軸の延長線上にあると共に上記第１の入射面の隣りに位置する上記導光部材の箇所に配置した第２の反射部とのうちの少なくとも一方を備えることを特徴とする光源モジュール。 The light source module according to any one of claims 1 to 3,
A first reflecting portion located on an extension line of the optical axis of the first light source and located at a position of the light guide member located adjacent to the second incident surface; and an optical axis of the second light source. A light source module comprising: at least one of a second reflecting portion disposed on a portion of the light guide member located on an extension line and adjacent to the first incident surface. 請求項４に記載の光源モジュールにおいて、
上記第１の反射部の反射面の法線は上記第１の光源の光軸に対して傾斜しており、上記第２の反射部の反射面の法線は上記第２の光源の光軸に対して傾斜していることを特徴とする光源モジュール。 The light source module according to claim 4,
The normal line of the reflection surface of the first reflection part is inclined with respect to the optical axis of the first light source, and the normal line of the reflection surface of the second reflection part is the optical axis of the second light source. A light source module which is inclined with respect to the light source. 請求項１から５のいずれか１つに記載の光源モジュールにおいて、
上記導光部材の上記光取り出し面は、
上記第１の入射面の法線方向の寸法が、上記光取り出し面の法線方向と上記第１の入射面の法線方向とに直交する奥行き方向の寸法よりも長いことを特徴とする光源モジュール。 The light source module according to any one of claims 1 to 5,
The light extraction surface of the light guide member is
A dimension of a normal direction of the first incident surface is longer than a dimension of a depth direction perpendicular to the normal direction of the light extraction surface and the normal direction of the first incident surface. module. 請求項１から５のいずれか１つに記載の光源モジュールにおいて、
上記導光部材の上記光取り出し面は、
上記光取り出し面の法線方向と上記第１の入射面の法線方向とに直交する奥行き方向の寸法が、上記第１の入射面の法線方向の寸法以上であることを特徴とする光源モジュール。 The light source module according to any one of claims 1 to 5,
The light extraction surface of the light guide member is
A light source characterized in that a dimension in a depth direction perpendicular to a normal direction of the light extraction surface and a normal direction of the first incident surface is equal to or larger than a dimension in the normal direction of the first incident surface. module. 請求項１から７のいずれか１つに記載の光源モジュールにおいて、
上記第１、第２の光源は、発光素子であることを特徴とする光源モジュール。 In the light source module according to any one of claims 1 to 7,
The light source module, wherein the first and second light sources are light emitting elements. 請求項１から８のいずれか１つに記載の光源モジュールにおいて、
上記拡散構造は、上記光を拡散させる複数の拡散部を有し、
上記複数の拡散部は、上記導光部材の背面の光軸方向の両端から中央に向かって光軸方向の単位寸法当たりの個数が増加していることを特徴とする光源モジュール。 The light source module according to any one of claims 1 to 8,
The diffusion structure has a plurality of diffusion parts for diffusing the light,
The light source module according to claim 1, wherein the number of the plurality of diffusing portions is increased per unit dimension in the optical axis direction from both ends of the rear surface of the light guide member toward the center. 請求項９に記載の光源モジュールにおいて、
上記複数の拡散部は、
上記導光部材の上記背面の両端のうちの上記光源に近い方の端領域での光軸方向の単位寸法当たりの個数が、上記背面の両端のうちの上記光源から遠い方の端領域での光軸方向の単位寸法当たりの個数よりも少なくなっていることを特徴とする光源モジュール。 The light source module according to claim 9,
The plurality of diffusion parts are
The number per unit dimension in the optical axis direction in the end region closer to the light source of both ends of the back surface of the light guide member is the end region far from the light source of both ends of the back surface. The light source module is characterized in that the number is smaller than the number per unit dimension in the optical axis direction. 請求項１から１０のいずれか１つに記載の光源モジュールにおいて、
上記光取り出し面に形成されていると共に上記第１,第２の入射面から入射した上記第１,第２の光源からの光を拡散させる拡散構造をさらに備えたことを特徴とする光源モジュール。 The light source module according to claim 1,
A light source module, further comprising a diffusion structure formed on the light extraction surface and diffusing light from the first and second light sources incident from the first and second incident surfaces. 請求項１から１１のいずれか１つに記載の光源モジュールにおいて、
上記第１の光源を上記導光部材の第１の入射面に取り付けると共に上記第１の光源による光を上記第１の入射面に導くための第１の結合部材と、
上記第２の光源を上記導光部材の第２の入射面に取り付けると共に上記第２の光源による光を上記第２の入射面に導くための第２の結合部材とを備えたことを特徴とする光源モジュール。 The light source module according to any one of claims 1 to 11,
A first coupling member for attaching the first light source to the first incident surface of the light guide member and guiding light from the first light source to the first incident surface;
The second light source is attached to a second incident surface of the light guide member, and a second coupling member for guiding light from the second light source to the second incident surface is provided. Light source module. 請求項１から１２のいずれか１つに記載の光源モジュールを、複数または単数備えたことを特徴とする照明装置。   An illumination device comprising a plurality or one of the light source modules according to claim 1.
JP2008211525A 2008-08-20 2008-08-20 Light source module and illuminating device equipped with the same Pending JP2010049867A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008211525A JP2010049867A (en) 2008-08-20 2008-08-20 Light source module and illuminating device equipped with the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008211525A JP2010049867A (en) 2008-08-20 2008-08-20 Light source module and illuminating device equipped with the same

Publications (1)

Publication Number Publication Date
JP2010049867A true JP2010049867A (en) 2010-03-04

Family

ID=42066787

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008211525A Pending JP2010049867A (en) 2008-08-20 2008-08-20 Light source module and illuminating device equipped with the same

Country Status (1)

Country Link
JP (1) JP2010049867A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002270020A (en) * 2001-03-08 2002-09-20 Casio Comput Co Ltd Light source device
JP2003114414A (en) * 2001-10-05 2003-04-18 Fujitsu Ltd Liquid crystal display device to be used in electronic equipment
JP2004127931A (en) * 2002-09-09 2004-04-22 Nichia Chem Ind Ltd Planar light emitting device
JP2004127745A (en) * 2002-10-03 2004-04-22 Sanyo Electric Co Ltd Surface light source device
JP2004319252A (en) * 2003-04-16 2004-11-11 Toppan Printing Co Ltd Light guide plate, and lighting device and display device using light guide plate
JP2006156194A (en) * 2004-11-30 2006-06-15 Optrex Corp Illumination device
JP2006294361A (en) * 2005-04-08 2006-10-26 Toppan Printing Co Ltd Light guide plate and display device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002270020A (en) * 2001-03-08 2002-09-20 Casio Comput Co Ltd Light source device
JP2003114414A (en) * 2001-10-05 2003-04-18 Fujitsu Ltd Liquid crystal display device to be used in electronic equipment
JP2004127931A (en) * 2002-09-09 2004-04-22 Nichia Chem Ind Ltd Planar light emitting device
JP2004127745A (en) * 2002-10-03 2004-04-22 Sanyo Electric Co Ltd Surface light source device
JP2004319252A (en) * 2003-04-16 2004-11-11 Toppan Printing Co Ltd Light guide plate, and lighting device and display device using light guide plate
JP2006156194A (en) * 2004-11-30 2006-06-15 Optrex Corp Illumination device
JP2006294361A (en) * 2005-04-08 2006-10-26 Toppan Printing Co Ltd Light guide plate and display device

Similar Documents

Publication Publication Date Title
US8353614B2 (en) Backlight unit
KR20060051571A (en) Illumination apparatus
KR20040070843A (en) A Light Guide Panel With Guided-light Parts
JP2009289701A (en) Lighting device, plane light source device, and liquid crystal display
JP2012109243A (en) Light source module and illumination apparatus
JP2007087618A (en) Surface light source device and display device
JP2007048465A (en) Led surface light source device
JP4645314B2 (en) Light guide plate, edge light type surface light source and liquid crystal display device using the same
CN211741786U (en) Double-screen display device
JP5360646B2 (en) Line lighting device
JP2008262766A (en) Light guide plate, plane light source device, and liquid crystal display device
JP5068865B2 (en) Light source module and electronic device including the same
TW201426125A (en) Light guide plate and backlight module
JP2006227347A (en) Back light unit for liquid crystal display, and liquid crystal display
WO2012132568A1 (en) Light source module and electronic device provided with same
JP4565030B2 (en) Light source module and lighting device including the same
WO2016002883A1 (en) Illumination device and display device
TWI407162B (en) Light guide plate and backlight module
JP2010287556A (en) Lighting device and display including the same
JP5772252B2 (en) Light guide, lighting device, and display device
JP2006202559A (en) Surface light source apparatus
JP2008251373A (en) Surface light emitting device
JP2010049867A (en) Light source module and illuminating device equipped with the same
CN100419530C (en) Area light source device and liquid crystal display
JP5128533B2 (en) Light source module and lighting device including the same

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20100826

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20120127

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20120131

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20120329

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20120529

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20130402