JP3073132B2 - Flat light source device - Google Patents
Flat light source deviceInfo
- Publication number
- JP3073132B2 JP3073132B2 JP06168403A JP16840394A JP3073132B2 JP 3073132 B2 JP3073132 B2 JP 3073132B2 JP 06168403 A JP06168403 A JP 06168403A JP 16840394 A JP16840394 A JP 16840394A JP 3073132 B2 JP3073132 B2 JP 3073132B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- light source
- band
- source device
- flat
- 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.)
- Expired - Fee Related
Links
Landscapes
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
- Light Guides In General And Applications Therefor (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、透過型表示パネルへ表
示に必要な光を供給する光源装置として好適に用いられ
る平面光源装置に関し、特に光源として一般的な蛍光放
電管を用いる平面光源装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat light source device suitably used as a light source device for supplying light necessary for display to a transmissive display panel, and more particularly to a flat light source device using a general fluorescent discharge tube as a light source. About.
【０００２】[0002]
【従来の技術】従来、蛍光放電管から出射される光を選
択的に遮断または反射させる光学部品が幾つか提案され
ている。2. Description of the Related Art Hitherto, several optical components for selectively blocking or reflecting light emitted from a fluorescent discharge tube have been proposed.
【０００３】特開昭５６−１５０７０２には、光透過性
基板の一方の面に第１の遮光または反射パターンを設
け、他方の面に第１のパターンに対してネガとポジの関
係にある第２の遮光または反射パターンを、対応する位
置またはそこから平行移動した位置に設けて成る方向選
択性遮光または反射シートが開示されている。Japanese Patent Application Laid-Open No. 56-150702 discloses a method in which a first light-shielding or reflecting pattern is provided on one surface of a light-transmitting substrate and a negative and positive pattern is provided on the other surface with respect to the first pattern. There is disclosed a direction-selective light-shielding or reflecting sheet in which two light-shielding or reflecting patterns are provided at corresponding positions or positions shifted in parallel therefrom.
【０００４】特開昭５６−１５０７０３には、光透過性
基板の一方の面に第１の遮光または反射パターンを設
け、他方の面に第１のパターンと同一形状の遮光または
反射パターンを、対応する位置またはそこから平行移動
した位置に設けて成る方向選択性遮光または反射シート
が開示されている。Japanese Patent Application Laid-Open No. 56-150703 discloses a method in which a first light-shielding or reflecting pattern is provided on one surface of a light-transmitting substrate, and a light-shielding or reflecting pattern having the same shape as the first pattern is provided on the other surface. There is disclosed a direction-selective light-shielding or reflecting sheet provided at a position where the light-shielding member is moved or moved in parallel therefrom.
【０００５】実開昭５８−１８０５０３には、透明性基
板の表面にピッチが２．５４〜１０．１６μｍの遮光性
を有する直線状の線条が設けられていることを特徴とす
る光学フィルタが開示されている。Japanese Utility Model Application Laid-Open No. 58-180503 discloses an optical filter characterized in that a light-shielding linear line having a pitch of 2.54 to 10.16 μm is provided on the surface of a transparent substrate. It has been disclosed.
【０００６】特開昭６３−１０１０３には、光透過性板
の表面または裏面のいずれか一方の面であって、かつ光
源に対応する位置に印刷膜を形成するとともに、上記光
透過性板の単位面積当たりの上記印刷膜の占有面積率
を、上記光源からの光の輝度の高い部分では大きくする
一方、光の輝度の高い部分から光の輝度が低下するに従
い、徐々に小さくなるようにしたことを特徴とする照明
用板が開示されている。Japanese Patent Application Laid-Open No. 63-10103 discloses a method in which a printed film is formed on one of the front and back surfaces of a light-transmitting plate and at a position corresponding to a light source. The occupied area ratio of the printing film per unit area was increased in a portion where the brightness of the light from the light source was high, while gradually decreasing as the brightness of the light decreased from the portion where the brightness of the light was high. A lighting plate characterized by the above is disclosed.
【０００７】また、蛍光放電管から出射される光を拡散
させる光学部品として、特開平５−３０７１０５には、
光透過性を有する基体シートが光の拡散透過を必要とす
る部分に凹凸を有し、その上に光透過性を有する蒸着層
が凹凸面に沿うように設けられたことを特徴とする光拡
散シートが開示されている。Japanese Patent Application Laid-Open No. 5-307105 discloses an optical component for diffusing light emitted from a fluorescent discharge tube.
Light diffusion, characterized in that the light-transmitting base sheet has irregularities in portions requiring diffusion and transmission of light, and a light-transmitting vapor-deposited layer is provided thereon along the irregularities. A sheet is disclosed.
【０００８】さらに、蛍光放電管から放出される電気ノ
イズを軽減させる構造として、光を選択的に透過および
遮断する光選択部材と表示板との間にインジウム錫酸化
物（ＩＴＯ）を蒸着させた透明板を配置して、この透明
板をアース部に接地する構造がある。特開平４−６５２
３には、表示板の後方に配置された光源と、該光源から
の光を表示板側へ反射するための反射板とを備えた平面
光源装置において、該反射板は、前記光源から発生する
電気ノイズが外部に影響を与えるのを防止するよう、導
電性を有する合成樹脂で形成されたことが開示されてい
る。Further, as a structure for reducing electric noise emitted from the fluorescent discharge tube, indium tin oxide (ITO) is deposited between a light selecting member for selectively transmitting and blocking light and the display panel. There is a structure in which a transparent plate is arranged and this transparent plate is grounded to a grounding portion. JP-A-4-652
3 is a flat light source device provided with a light source disposed behind the display panel and a reflector for reflecting light from the light source to the display panel side, wherein the reflector is generated from the light source. It is disclosed that it is formed of a conductive synthetic resin so as to prevent electric noise from affecting the outside.
【０００９】[0009]
【発明が解決しようとする課題】一般に、透過型表示パ
ネルへ表示に必要な光を供給する光源装置としては、高
輝度で均一な光学特性を持ち、かつ光源からの電気ノイ
ズの少ないものが要求される。Generally, as a light source device for supplying light necessary for display to a transmission type display panel, a light source device having high luminance, uniform optical characteristics, and little electric noise from the light source is required. Is done.
【００１０】前述の特開昭５６−１５０７０２、特開昭
５６−１５０７０３および実開昭５８−１８０５０３記
載の光学部品では、全てのパターンの占有面積率が光源
からの光の輝度の強弱によって調整されているのではな
く、単に光の方向性が一定になるように決定されている
だけである。したがって、光源からの光は拡散されず、
また光源から離れるにつれて輝度が低下するので、光源
装置からの照射光に輝度ムラが生じる。In the optical parts described in the above-mentioned JP-A-56-150702, JP-A-56-150703 and JP-A-58-180503, the occupied area ratio of all the patterns is adjusted by the intensity of the brightness of the light from the light source. Instead, it is simply determined so that the directionality of light is constant. Therefore, the light from the light source is not diffused,
In addition, since the luminance decreases as the distance from the light source increases, luminance unevenness occurs in light emitted from the light source device.
【００１１】また、前述の特開昭６３−１０１０３記載
の光透過性板は、表面または裏面のいずれか一方の面の
みに印刷膜が形成されていて、光を反射または遮断させ
るのみである。したがって、拡散効果はなく、輝度ムラ
の改善は充分ではない。The light-transmitting plate described in JP-A-63-10103 has a printed film formed on only one of the front surface and the back surface, and only reflects or blocks light. Therefore, there is no diffusion effect, and the improvement of luminance unevenness is not sufficient.
【００１２】さらに、前述の特開平５−３０７１０５記
載の基体シート表面には、凹凸が設けられ、この部分に
蒸着層が形成されているので、拡散効果を有するが、前
記の技術も含め、これらの技術には、光源から放出され
る電気ノイズ対策は採られていない。したがって、前記
電気ノイズによって透過型表示パネルにちらつきが生じ
る。Furthermore, the surface of the base sheet described in the above-mentioned JP-A-5-307105 is provided with irregularities, and a vapor deposition layer is formed on this surface, so that it has a diffusion effect. No technology is adopted in the above-mentioned technology to take measures against electric noise emitted from a light source. Therefore, the transmission type display panel flickers due to the electric noise.
【００１３】さらにまた、電気ノイズを低減させる構造
として、前述の特開平４−６５２３のように反射板を導
電性にして、あるいは光選択部材と表示板との間にＩＴ
Ｏを蒸着させた透明板を配置して、反射板あるいは透明
板をアース部に接地する構造などが採られている。しか
し、これらの構造ではそれぞれ順に、輝度ムラ対策が採
られていない、ＩＴＯは配線が難しく、透明板から剥離
しやすいという問題点がある。また、これらの構造はい
ずれも部品点数が多くなるためコスト的に不利であり、
しかも透明板とは言え全体的には若干の輝度低下が生じ
る。Further, as a structure for reducing the electric noise, the reflection plate is made conductive as described in JP-A-4-6523, or the IT is provided between the light selection member and the display plate.
There is employed a structure in which a transparent plate on which O is vapor-deposited is arranged, and the reflecting plate or the transparent plate is grounded to an earth portion. However, these structures have problems that, in order, no measures are taken against luminance unevenness, and that ITO is difficult to wire and easy to peel off from the transparent plate. In addition, these structures are disadvantageous in terms of cost because the number of parts is large,
In addition, although it is a transparent plate, the brightness is slightly reduced as a whole.
【００１４】本発明の目的は、照射光の輝度ムラおよび
電気ノイズによる透過型表示パネルのちらつきを軽減す
る平面光源装置を提供することである。An object of the present invention is to provide a flat light source device which reduces flicker of a transmission type display panel due to uneven brightness of irradiation light and electric noise.
【００１５】[0015]
【課題を解決するための手段】本発明は、予め定める照
射面に光を照射する平面光源装置において、光源と、前
記光源を外囲し、前記予め定める照射面側に開口部を有
する反射部材と、前記光源と、前記予め定める照射面と
の間に配置され、光源光を拡散する光拡散部材と、前記
光源と、前記光拡散部材との間に配置され、光源光を選
択的に透過および遮断することによる輝度ムラ改善機能
を有する光選択部材であって、透光性基板と、前記透光
性基板の表裏両面にそれぞれ配置され、遮光性材料から
成り、その表面は光反射性を有する複数の帯状部材とを
含み、前記帯状部材は、前記透光性基板の表面と裏面と
では、互いに重なり合わないように配置される光選択部
材とを含むことを特徴とする平面光源装置である。According to the present invention, there is provided a flat light source device for irradiating a predetermined irradiation surface with light, and a light source and a reflecting member surrounding the light source and having an opening on the predetermined irradiation surface side. And a light diffusing member disposed between the light source and the predetermined irradiation surface to diffuse light from the light source; and a light diffusing member disposed between the light source and the light diffusing member to selectively transmit light from the light source. And a light selection member having a function of improving luminance unevenness by blocking, a light-transmitting substrate, disposed on both the front and back surfaces of the light-transmitting substrate, and made of a light-shielding material, the surface of which has light reflectivity. A plurality of band-shaped members having a light-selecting member that is disposed so as not to overlap with each other on the front surface and the back surface of the light-transmitting substrate. is there.
【００１６】[0016]
【００１７】さらに本発明の前記帯状部材は、光源の形
状に沿った形状に選ばれることを特徴とする。Further, the strip-shaped member of the present invention is characterized in that it is selected to have a shape following the shape of the light source.
【００１８】また本発明の前記帯状部材の幅は、光源か
ら遠ざかるにつれて、小さく選ばれることを特徴とす
る。Further, according to the present invention, the width of the band-shaped member is selected to be smaller as the distance from the light source increases.
【００１９】さらにまた本発明の前記帯状部材の配置間
隔は、光源から遠ざかるにつれて、大きく選ばれること
を特徴とする。Still further, the arrangement interval of the band-shaped member of the present invention is selected to be larger as the distance from the light source increases.
【００２０】また本発明は、予め定める照射面に光を照
射する平面光源装置において、光源と、前記光源を外囲
し、前記予め定める照射面側に開口部を有する反射部材
と、前記光源と、前記予め定める照射面との間に配置さ
れ、光源光を拡散する光拡散部材と、前記光源と、前記
光拡散部材との間に配置され、光源光を選択的に透過お
よび遮断する光選択部材であって、透光性基板と、前記
透光性基板の表裏両面にそれぞれ配置され、遮光性材料
から成り、その表面は光反射性を有する複数の帯状部材
とを含み、前記帯状部材は、前記透光性基板の表面と裏
面とでは、互いに重なり合わないように配置され、該帯
状部材は、導電性を有し、かつ接地電位に接続されてい
る光選択部材とを含むことを特徴とする平面光源装置で
ある。The present invention also provides a flat light source device for irradiating a predetermined irradiation surface with light, a light source, a reflecting member surrounding the light source and having an opening on the predetermined irradiation surface side, A light diffusion member disposed between the predetermined irradiation surface and diffusing light from the light source; and a light selection member disposed between the light source and the light diffusion member to selectively transmit and block the light from the light source. A member, a light-transmitting substrate, disposed on each of the front and back surfaces of the light-transmitting substrate, made of a light-shielding material, the surface of which includes a plurality of band members having light reflectivity, wherein the band member is The front and back surfaces of the light-transmitting substrate are arranged so as not to overlap with each other, and the band-shaped member includes a light-selecting member having conductivity and connected to a ground potential. Is a planar light source device.
【００２１】また本発明の前記帯状部材は、熱伝導率の
比較的高い材料から成ることを特徴とする。Further, the strip-shaped member of the present invention is characterized by being made of a material having a relatively high thermal conductivity.
【００２２】[0022]
【作用】本発明に従えば、平面光源装置は、光源と、前
記光源を外囲し予め定める照射面側に開口部を有する反
射部材と、前記光源と前記照射面との間に配置され光源
光を拡散する光拡散部材と、前記光源と前記光拡散部材
との間に配置され光源光を選択的に透過および遮断する
ことによる輝度ムラ改善機能を有する光選択部材とを含
んで構成される。According to the present invention, a flat light source device comprises a light source, a reflecting member surrounding the light source and having an opening on a predetermined irradiation surface side, and a light source disposed between the light source and the irradiation surface. A light diffusing member that diffuses light, and a light selecting member that is disposed between the light source and the light diffusing member and that has a function of improving luminance unevenness by selectively transmitting and blocking light from the light source. .
【００２３】光源からの光は、そのまま、または反射部
材によって反射されて照射面側の開口部から出射する。
当該光源からの光は光選択部材によって選択的に透過お
よび遮断される。すなわち、光は、照射面と平行な平面
において、光源から離れるにつれて透過光量が多くなる
ように選択される。このため比較的輝度が高くなる光源
近傍の光は透過光量が少なくなり、輝度が低くなる光源
から離れた付近の光は透過光量が多くなる。したがっ
て、照射光の輝度ムラを低減することができる。また、
光選択部材を透過した光は光拡散部材によって拡散され
て、前記照射面から出射する。したがって、輝度ムラを
さらに低減することができる。The light from the light source exits from the opening on the irradiation surface side as it is or is reflected by the reflection member.
Light from the light source is selectively transmitted and blocked by the light selection member. That is, the light is selected such that, in a plane parallel to the irradiation surface, the amount of transmitted light increases as the distance from the light source increases. For this reason, the amount of transmitted light decreases near the light source whose luminance is relatively high, and the amount of transmitted light increases near the distance from the light source whose luminance decreases. Therefore, it is possible to reduce the uneven brightness of the irradiation light. Also,
The light transmitted through the light selection member is diffused by the light diffusion member and exits from the irradiation surface. Therefore, luminance unevenness can be further reduced.
【００２４】また、前記光選択部材は、透光性基板と、
前記透光性基板の表裏両面にそれぞれ配置され、遮光性
材料から成り、その表面は光反射性を有する複数の帯状
部材とを含み、前記帯状部材は、前記透光性基板の表面
と裏面とでは互いに重なり合わないように配置される。Further, the light selecting member includes a light-transmitting substrate,
The translucent substrate is disposed on each of the front and back surfaces, is made of a light-shielding material, and includes a plurality of band members having light reflectivity, and the band members include a front surface and a back surface of the light transmissive substrate. Are arranged so as not to overlap each other.
【００２５】光源からの光のうちの一部は透光性基板の
一方表面に配置される一方帯状部材によって反射される
けれども、その他の光は一方帯状部材の間から透光性基
板内に入射する。当該光は、透光性基板の一方表面に配
置される一方帯状部材と、他方表面に配置される他方帯
状部材とによって反射され、最終的には透光性基板の一
方または他方表面から出射する。前記一方および他方帯
状部材を互いに重なり合わないように配置することによ
って、透光性基板の一方表面側から入射した光を効率よ
く他方表面側から出射させることができる。A part of the light from the light source is reflected by the band-shaped member disposed on one surface of the light-transmitting substrate, but the other light enters the light-transmitting substrate from between the band-shaped members. I do. The light is reflected by the one band-shaped member disposed on one surface of the light-transmitting substrate and the other band-shaped member disposed on the other surface, and finally emitted from one or the other surface of the light-transmitting substrate. . By arranging the one and other belt-shaped members so as not to overlap with each other, light incident from one surface side of the translucent substrate can be efficiently emitted from the other surface side.
【００２６】さらに好ましくは、前記帯状部材は、光源
の形状に沿った形状に選ばれる。したがって、いかなる
形状の光源であっても、光選択部材による効果を充分に
得ることが可能である。[0026] More preferably, the band-like member is selected to have a shape following the shape of the light source. Therefore, even if the light source has any shape, it is possible to sufficiently obtain the effect of the light selecting member.
【００２７】さらにまた好ましくは、前記帯状部材の幅
は光源から遠ざかるにつれて小さく選ばれ、その配置間
隔は光源から遠ざかるにつれて大きく選ばれる。これに
よって、上述したように比較的輝度が高くなる光源近傍
の光は透過光量が少なくなり、輝度が低くなる光源から
離れた付近の光は透過光量が多くなる。したがって、照
射光の輝度ムラをほぼなくすことが可能である。Still more preferably, the width of the band-shaped member is selected to be smaller as the distance from the light source is increased, and the arrangement interval is selected to be larger as the distance from the light source is increased. As a result, as described above, the amount of transmitted light near the light source whose luminance is relatively high becomes small, and the amount of transmitted light near the light source whose luminance becomes low is increased. Therefore, it is possible to substantially eliminate the uneven brightness of the irradiation light.
【００２８】さらにまた本発明に従えば、平面光源装置
は、光源と、前記光源を外囲し予め定める照射面側に開
口部を有する反射部材と、前記光源と前記照射面との間
に配置され光源光を拡散する光拡散部材と、前記光源と
前記光拡散部材との間に配置され光源光を選択的に透過
および遮断する光選択部材とを含んで構成される。ま
た、前記光選択部材は、透光性基板と、前記透光性基板
の表裏両面にそれぞれ配置され、遮光性材料から成り、
その表面は光反射性を有する複数の帯状部材とを含み、
前記帯状部材は、前記透光性基板の表面と裏面とでは互
いに重なり合わないように配置される。さらに、前記帯
状部材は、導電性を有し、かつ接地電位に接続されてい
る。したがって、光源から発せられる電気ノイズが低減
されるため、透過型表示パネルのちらつきが軽減され
る。Still further in accordance with the present invention, there is provided a planar light source device comprising: a light source; a reflecting member surrounding the light source and having an opening on a predetermined irradiation surface side; and a reflecting member disposed between the light source and the irradiation surface. And a light selecting member disposed between the light source and the light diffusing member for selectively transmitting and blocking the light from the light source. In addition, the light selection member is disposed on each of the front and back surfaces of the light-transmitting substrate and the light-transmitting substrate, and is made of a light-shielding material,
The surface includes a plurality of light-reflective strips,
The strip-shaped members are arranged so as not to overlap each other on the front surface and the back surface of the light-transmitting substrate. Further, the belt-shaped member has conductivity and is connected to a ground potential. Therefore, the electric noise emitted from the light source is reduced, so that the flicker of the transmissive display panel is reduced.
【００２９】また好ましくは、光源からの熱は、熱伝導
率の比較的高い帯状部材によって外部に放熱されるた
め、平面光源装置内に熱が蓄積することがなくなる。こ
のため、表示パネルの光源として用いたときの、前記表
示パネルに対する熱の影響を軽減することが可能とな
る。Preferably, the heat from the light source is radiated to the outside by the belt-like member having a relatively high thermal conductivity, so that the heat does not accumulate in the flat light source device. Therefore, it is possible to reduce the influence of heat on the display panel when used as a light source of the display panel.
【００３０】[0030]
【実施例】図１は本発明の一実施例である平面光源装置
１の平面図であり、図２は図１に示す切断面線Ｉ−Ｉか
ら見た平面光源装置１の断面図であり、図３は図１に示
す切断面線ＩＩ−ＩＩから見た平面光源装置１の断面図
である。FIG. 1 is a plan view of a flat light source device 1 according to one embodiment of the present invention, and FIG. 2 is a cross-sectional view of the flat light source device 1 taken along a cutting line II shown in FIG. FIG. 3 is a cross-sectional view of the flat light source device 1 taken along line II-II shown in FIG.
【００３１】平面光源装置１は、光源２と、光源２を外
囲し表示パネル３側に開口部４ａを有する反射部材４
と、光源２と表示パネル３との間に配置されて光源光を
拡散する光拡散部材５と、光源２と光拡散部材５との間
に配置されて光源光を選択的に透過および遮断する光選
択部材６と、反射部材４の開口部４ａと反対側に配置さ
れ、導電性材料から成る配線７によって光選択部材６と
接続されるアース部を兼ねた放熱部材８とを含んで構成
される。The flat light source device 1 comprises a light source 2 and a reflecting member 4 surrounding the light source 2 and having an opening 4a on the display panel 3 side.
A light diffusing member 5 disposed between the light source 2 and the display panel 3 to diffuse light from the light source; and a light diffusing member 5 disposed between the light source 2 and the light diffusing member 5 to selectively transmit and block the light from the light source. A light selection member 6 and a heat radiating member 8 which is arranged on the opposite side of the opening 4a of the reflection member 4 and is also connected to the light selection member 6 by a wiring 7 made of a conductive material and also serves as a grounding portion. You.
【００３２】光源２には、それぞれ直径Ｄを有する２本
の蛍光放電管が使用されており、この蛍光放電管は図２
の如く、反射部材４内に並列に配列されている。As the light source 2, two fluorescent discharge tubes each having a diameter D are used.
Are arranged in parallel in the reflection member 4.
【００３３】反射部材４には、白色樹脂表面に銀メッキ
を施すことで鏡面効果を持たせたものが使用されるが、
白色樹脂をそのまま使用してもよい。As the reflecting member 4, a member having a mirror effect by applying silver plating to the surface of a white resin is used.
The white resin may be used as it is.
【００３４】光拡散部材５には、光透過性を有する基体
シートの表面を凹凸状にした光拡散シート、あるいはそ
の凹凸面上にさらに光透過性を有する蒸着層を凹凸面に
沿うように設けた光拡散シートなどが使用され、直進す
る光の方向を変化させ、全体的に光を分散させて光量の
均衡を図る役割を果す。光拡散部材５は、反射部材４の
開口部４ａを覆う大きさに形成される。The light diffusing member 5 is a light diffusing sheet in which the surface of a light transmissive base sheet is made uneven, or a light transmissive vapor deposition layer is provided on the uneven surface along the uneven surface. A light diffusing sheet or the like is used to change the direction of the light traveling straight, thereby dispersing the light as a whole and playing a role of balancing the amount of light. The light diffusion member 5 is formed in a size to cover the opening 4a of the reflection member 4.
【００３５】放熱部材８は、平板状の基台８ａの一方表
面上に直方体状の突起８ｂが、前記基台８ａの長手方向
または長手方向に直交する方向に沿って複数個形成され
ており、他方表面を反射部材４と対向させ、所定の間隔
をあけて、あるいは直接接触させて配置される。The heat dissipating member 8 has a plurality of rectangular parallelepiped projections 8b formed on one surface of a flat base 8a along a longitudinal direction of the base 8a or a direction perpendicular to the longitudinal direction. The other surface is opposed to the reflecting member 4 and is arranged at a predetermined interval or in direct contact.
【００３６】図４は図１に示す光選択部材６の平面図で
あり、図５は図４に示す切断面線ＩＩＩ−ＩＩＩから見
た光選択部材６の断面図であり、図６は図４に示す切断
面線ＩＶ−ＩＶから見た光選択部材６の断面図である。FIG. 4 is a plan view of the light selecting member 6 shown in FIG. 1, FIG. 5 is a cross-sectional view of the light selecting member 6 taken along the cutting plane line III-III shown in FIG. 4, and FIG. FIG. 4 is a cross-sectional view of the light selection member 6 viewed from a section line IV-IV shown in FIG.
【００３７】光選択部材６は、透光性基板９と、透光性
基板９の表裏両面９ａ，９ｂにそれぞれ配置され、遮光
性材料から成り、その表面は光反射性を有する複数の帯
状部材１０とを含んで構成される。透光性基板９は、ポ
リカーボネートなどの合成樹脂をシート状に成型して形
成され、光拡散部材５と同様に、反射部材４の開口部４
ａを覆う大きさに形成される。The light selection member 6 is disposed on each of the front and back surfaces 9a and 9b of the light-transmitting substrate 9 and the light-transmitting substrate 9 and is made of a light-shielding material. 10 is included. The translucent substrate 9 is formed by molding a synthetic resin such as polycarbonate into a sheet shape, and like the light diffusing member 5, the opening 4 of the reflecting member 4.
It is formed in a size to cover a.
【００３８】複数の帯状部材１０は、２つの光源２に対
応してそれぞれ設けられ、透光性基板９の表面９ａと裏
面９ｂとに、前記光源２の長手方向と帯状部材１０の長
手方向とが平行となるように設けられる。本実施例で
は、１つの光源２に対応して、帯状部材１０を表面９ａ
に５、裏面９ｂに５ずつ設ける。また複数の帯状部材１
０は、透光性基板９の表面９ａと裏面９ｂとでは、互い
に重なり合わないように配置される。各帯状部材１０
は、アルミニウム、銅、銀などの金属を、たとえば蒸着
することによって形成されているが、反射率、光源光の
色度のずれ、およびコストの面から考慮して、アルミニ
ウムが最適である。複数の帯状部材１０の一部が透光性
基板９の表面９ａと裏面９ｂとで重なり合うと、光源光
が完全に遮断されてしまうため、表示パネル３に供給さ
れる光量が少なくなり過ぎて輝度ムラが生じるおそれが
ある。The plurality of belt-like members 10 are provided corresponding to the two light sources 2, respectively. The longitudinal direction of the light source 2 and the longitudinal direction of the belt-like member 10 are provided on the front surface 9 a and the back surface 9 b of the translucent substrate 9. Are provided in parallel. In the present embodiment, the belt-shaped member 10 is placed on the front surface 9a corresponding to one light source 2.
5 and 5 on the back surface 9b. In addition, a plurality of belt-like members 1
Numerals 0 are arranged so that the front surface 9a and the back surface 9b of the translucent substrate 9 do not overlap each other. Each band member 10
Is formed, for example, by vapor deposition of a metal such as aluminum, copper, or silver. Aluminum is most suitable in consideration of reflectance, deviation of chromaticity of light from the light source, and cost. When a part of the plurality of strip-shaped members 10 overlaps on the front surface 9a and the back surface 9b of the translucent substrate 9, the light source light is completely blocked, so that the amount of light supplied to the display panel 3 becomes too small and the luminance is reduced. Unevenness may occur.
【００３９】なお、図２に示されるように１つの光源２
に対応して設けられる複数の帯状部材１０は、少なくと
も光源２と対向する透光性基板の表面９ａの領域に設け
られ、前記領域の帯状部材１０の長手方向に直交する方
向に平行な幅Ｗ１は、光源２の直径Ｄと等しい長さとな
る。また、光源２と対向する領域以上に設ける場合、前
記幅Ｗ２は光源２の直径Ｄの２倍以下の範囲に選ばれ
る。このような帯状部材１０の幅はＡに選ばれ、隣接す
る帯状部材１０の間隔はＢに選ばれ、これらは後述する
ように選ばれる。Note that, as shown in FIG.
Are provided at least in the region of the surface 9a of the light-transmitting substrate facing the light source 2, and have a width W1 parallel to a direction orthogonal to the longitudinal direction of the band member 10 in the region. Has a length equal to the diameter D of the light source 2. In the case where the light source 2 is provided in an area larger than the area facing the light source 2, the width W2 is selected to be equal to or less than twice the diameter D of the light source 2. The width of such a band-shaped member 10 is selected as A, and the interval between adjacent band-shaped members 10 is selected as B, and these are selected as described later.
【００４０】図７は、図４に示す複数の帯状部材１０の
接続部分を示す拡大平面図である。全ての隣り合う表側
帯状部材１０ａがその両端で接続され、少なくとも１本
以上の導電性材料から成る配線７ａによってまとめら
れ、同様に全ての隣り合う裏側帯状部材１０ｂもその両
端で接続され、少なくとも１本以上の導電性材料から成
る配線７ｂによってまとめられる。配線７ａ，７ｂは、
いずれもアース部を兼ねた放熱部材８に半田付け、また
はねじ止めによって接続される。FIG. 7 is an enlarged plan view showing a connection portion of the plurality of band-shaped members 10 shown in FIG. All adjacent front side band members 10a are connected at both ends thereof, and are collected by at least one or more wires 7a made of a conductive material. Similarly, all adjacent back side band members 10b are connected at both ends thereof, and The wirings 7b are composed of at least two conductive materials. The wirings 7a and 7b are
Each of them is connected to the heat radiating member 8 also serving as a ground portion by soldering or screwing.
【００４１】図８は、前記光選択部材６の光学的特性を
説明するための断面図である。ここでは１つの光源２に
ついての特性を説明する。複数の帯状部材１０は、光源
２に関して線対称であるため、以下図８において、添字
「Ｌ」を付して示す左側部分についてのみ説明し、添字
「Ｒ」を付して示す右側部分については説明は省略する
が、左側部分と全く同様である。FIG. 8 is a sectional view for explaining the optical characteristics of the light selecting member 6. As shown in FIG. Here, the characteristics of one light source 2 will be described. Since the plurality of belt-shaped members 10 are line-symmetric with respect to the light source 2, only the left portion indicated by the suffix “L” in FIG. 8 will be described below, and the right portion indicated by the suffix “R” will be described. Although the description is omitted, it is exactly the same as the left part.
【００４２】光源２からの光は、第１の帯状部材２１，
２２Ｌ，２３Ｌ（すなわち、透光性基板９の裏面９ｂに
形成される複数の帯状部材１０ｂ）、および第２の帯状
部材３１Ｌ，３２Ｌ，３３Ｌ（すなわち、透光性基板９
の表面９ａに形成される複数の帯状部材１０ａ）によっ
て全反射される。帯状部材の幅Ａは、光源から遠ざかる
につれて小さく選ばれており、図８においては、帯状部
材２３Ｌ、２２Ｌ、２１および帯状部材３３Ｌ、３２
Ｌ、３１Ｌという順番で帯状部材の幅Ａがそれぞれ小さ
く選ばれる。また、帯状部材の配置間隔Ｂは、光源から
遠ざかるにつれて大きく選ばれており、図８において
は、帯状部材２３Ｌ，２２Ｌの間隔が帯状部材２２Ｌ，
２１の間隔よりも大きく、帯状部材３３Ｌ，３２Ｌの間
隔が帯状部材３２Ｌ，３１Ｌの間隔よりも大きくそれぞ
れ選ばれる。The light from the light source 2 is applied to the first belt-shaped member 21,
22L, 23L (that is, the plurality of band members 10b formed on the back surface 9b of the light transmitting substrate 9) and the second band members 31L, 32L, 33L (that is, the light transmitting substrate 9).
Is totally reflected by a plurality of band-shaped members 10a) formed on the surface 9a of the hologram. The width A of the belt-like member is selected to be smaller as the distance from the light source increases. In FIG. 8, the belt-like members 23L, 22L, 21 and the belt-like members 33L, 32
The width A of the belt-shaped member is selected to be small in the order of L and 31L. Further, the arrangement interval B of the band members is selected to be larger as the distance from the light source increases, and in FIG. 8, the interval between the band members 23L and 22L is changed.
The distance between the belt-shaped members 33L, 32L is larger than the distance between the belt-shaped members 32L, 31L.
【００４３】第１例として、第１の帯状部材２１，２２
Ｌ，２３Ｌにあたった光は、完全に全反射されて表示パ
ネル３側へは一切透過しない。第２例として、第１の帯
状部材同士の間、つまり帯状部材２１，２２Ｌの間およ
び帯状部材２２Ｌ，２３Ｌの間を通過した光は、第２の
帯状部材３１Ｌ，３２Ｌ，３３Ｌによって反射部材４側
へ反射されるか、第２の帯状部材同士の間、つまり帯状
部材３１Ｌ，３２Ｌの間および帯状部材３２Ｌ，３３Ｌ
の間を通過して表示パネル３側へ出射される。第３例と
して、第１の帯状部材２１，２２Ｌ，２３Ｌ同士の間を
通過した光は、第２の帯状部材３１Ｌ，３２Ｌ，３３Ｌ
によって反射部材４側へ反射されるか表示パネル３側へ
出射されるが、第２の帯状部材３１Ｌ，３２Ｌ，３３Ｌ
によって反射部材４側へ反射された光がさらに第１の帯
状部材２２Ｌ，２３Ｌによって再び表示パネル３側へ反
射される。As a first example, first band members 21 and 22
The light hitting L and 23L is completely totally reflected and does not pass through to the display panel 3 side at all. As a second example, light passing between the first band members, that is, between the band members 21 and 22L and between the band members 22L and 23L is reflected by the second band members 31L, 32L and 33L. Side, or between the second band members, that is, between the band members 31L and 32L and the band members 32L and 33L.
And is emitted to the display panel 3 side. As a third example, the light that has passed between the first belt-shaped members 21, 22L, and 23L is transmitted to the second belt-shaped members 31L, 32L, and 33L.
The light is reflected toward the reflection member 4 or emitted toward the display panel 3 by the second band members 31L, 32L, and 33L.
The light reflected to the reflection member 4 side by the first band-shaped members 22L and 23L is further reflected again to the display panel 3 side.
【００４４】まとめると、光源２からの光は、次の３つ
の型に分類され得る。第１の型では、図８中にａＬで示
すように、光は第１の帯状部材２１，２２Ｌ，２３Ｌに
よって反射部材４側に反射される。第２の型では、図８
中にｂＬで示すように、光は第１の帯状部材２１，２２
Ｌ，２３Ｌ同士の間を通過した後、第２の帯状部材３１
Ｌ，３２Ｌ，３３Ｌによって反射部材４側へ反射される
か、第２の帯状部材３１Ｌ，３２Ｌ，３３Ｌ同士の間を
通過して表示パネル３側へ出射される。第３の型では、
図８中にｃＬで示すように、光は第２の帯状部材３１
Ｌ，３２Ｌ，３３Ｌによって反射部材４側へ反射された
後、第１の帯状部材２２Ｌ，２３Ｌによって再び表示パ
ネル３側へ反射され、以後はこの繰返しでいずれは反射
部材４側か表示パネル３側へ透過される。In summary, the light from the light source 2 can be classified into the following three types. In the first type, as shown by aL in FIG. 8, light is reflected toward the reflection member 4 by the first band-shaped members 21, 22L, and 23L. In the second type, FIG.
As shown by bL therein, light is transmitted to the first band members 21 and 22.
After passing between L and 23L, the second belt-shaped member 31
The light is reflected toward the reflection member 4 by the light emitting elements L, 32L, and 33L, or is emitted toward the display panel 3 through the space between the second belt-shaped members 31L, 32L, and 33L. In the third type,
As shown by cL in FIG.
L, 32L, and 33L reflect the light toward the reflecting member 4, and then the first belt-shaped members 22L and 23L reflect the light toward the display panel 3 again. Transmitted to
【００４５】本実施例によれば、帯状部材１０の幅Ａは
光源２に近いほど広く、隣り合う帯状部材１０の間隔Ｂ
は光源２に近いほど短くなっているので、光源２に近い
部分では表示パネル３側へ透過する光は少なく、逆に光
源２から離れた部分では表示パネル３側へ透過する光が
多い。したがって、光源２からの光のうちの、比較的輝
度の高い光源２近傍の光は透過光量が少なくなり、輝度
の低い光源２から離れた付近の光は透過光量が多くな
る。このため、輝度ムラが低減する。また、光選択部材
６を出射した光は光拡散部材５で拡散されて表示パネル
３に入射する。このため、輝度ムラをさらに低減するこ
とができる。According to the present embodiment, the width A of the belt-shaped member 10 is wider as it is closer to the light source 2, and the distance B between the adjacent belt-shaped members 10 is larger.
Is shorter as the distance from the light source 2 is shorter, so that less light is transmitted to the display panel 3 in a portion closer to the light source 2 and more light is transmitted to the display panel 3 in a portion farther from the light source 2. Therefore, of the light from the light source 2, the light in the vicinity of the light source 2 with relatively high luminance has a small transmitted light amount, and the light in the vicinity of the light source 2 with low luminance has a large transmitted light amount. For this reason, luminance unevenness is reduced. The light emitted from the light selection member 6 is diffused by the light diffusion member 5 and enters the display panel 3. Therefore, luminance unevenness can be further reduced.
【００４６】また、電気的特性においては、光源２から
放出される電気ノイズは、導電性を有する光選択部材６
の各帯状部材１０に伝わる。この各帯状部材１０は、全
て両端で接続され、少なくとも１本以上の導電性材料か
ら成る配線７によってまとめられ、アース部を兼ねた放
熱部材８に半田付けまたはねじ止めによって接地され
る。前記電気ノイズは各帯状部材１０から放熱部材８へ
伝わり放出される。したがって、表示パネル３への電気
ノイズの影響が低減され、良好な表示特性が得られる。In the electrical characteristics, the electrical noise emitted from the light source 2 is caused by the light selection member 6 having conductivity.
To each belt-shaped member 10. Each of the belt-shaped members 10 is connected at both ends, is combined by at least one or more wires 7 made of a conductive material, and is grounded by soldering or screwing to a heat radiating member 8 also serving as a ground portion. The electric noise is transmitted from each belt-shaped member 10 to the heat radiation member 8 and is emitted. Therefore, the influence of electric noise on the display panel 3 is reduced, and good display characteristics can be obtained.
【００４７】さらに、温度特性においては、光源２から
発せられる熱は、光選択部材６の各帯状部材１０に伝わ
る。この各帯状部材１０は、全て両端で接続され、少な
くとも１本以上の導電性材料から成る配線７によってま
とめられ、アース部を兼ねた放熱部材８に半田付けまた
はねじ止めによって接地される。前記光源２からの熱
は、熱伝導率の比較的高い金属から成る各帯状部材１０
を伝わって放熱部材８から放出される。したがって、蓄
積された熱による表示パネル３の表示特性の低下が軽減
される。Further, with respect to the temperature characteristics, the heat generated from the light source 2 is transmitted to each band-shaped member 10 of the light selection member 6. Each of the belt-shaped members 10 is connected at both ends, is combined by at least one or more wires 7 made of a conductive material, and is grounded by soldering or screwing to a heat radiating member 8 also serving as a ground portion. The heat from the light source 2 is applied to each of the strips 10 made of a metal having a relatively high thermal conductivity.
And is released from the heat radiation member 8. Therefore, the deterioration of the display characteristics of the display panel 3 due to the accumulated heat is reduced.
【００４８】図９は、本発明の他の実施例である平面光
源装置に使用される光選択部材４１の平面図である。本
実施例は、前述の実施例と類似しており、対応する構成
には同一の参照符号を付して説明を省略する。FIG. 9 is a plan view of a light selecting member 41 used in a flat light source device according to another embodiment of the present invention. This embodiment is similar to the above-described embodiment, and the corresponding components are denoted by the same reference numerals and description thereof will be omitted.
【００４９】本実施例の特徴は、全ての隣り合う複数の
帯状部材１０が、表示面内において表示特性に影響を与
えない部分で配線７によって接続されていることであ
る。前述の実施例では、全ての隣り合う複数の帯状部材
１０がその両端で接続されていたが、本実施例によれ
ば、たとえば図示されるように表示特性に影響を与えな
い中央付近において各帯状部材１０が配線７で接続され
る。なお、このような実施例は、たとえば表示パネル３
の表示領域が２分割されており、分割した表示領域間に
フレームなどが配置される場合に適用される。A feature of the present embodiment is that all the plurality of adjacent belt-shaped members 10 are connected by the wiring 7 at portions where the display characteristics are not affected on the display surface. In the above-described embodiment, all adjacent plural strip-shaped members 10 are connected at both ends. However, according to the present embodiment, for example, as shown in FIG. The member 10 is connected by the wiring 7. Note that such an embodiment is, for example, a display panel 3
Is divided into two display areas, and is applied when a frame or the like is arranged between the divided display areas.
【００５０】図１０は、本発明のさらに他の実施例であ
る平面光源装置に使用される光選択部材４２の平面図で
ある。本実施例も前述の実施例と類似しており、対応す
る構成には同一の参照符号を付して説明を省略する。FIG. 10 is a plan view of a light selecting member 42 used in a flat light source device according to still another embodiment of the present invention. This embodiment is also similar to the above-described embodiment, and the corresponding components are denoted by the same reference numerals and description thereof will be omitted.
【００５１】本実施例の特徴は、たとえばＵ字状に形成
された光源２を用いる場合、光選択部材４２を構成する
複数の帯状部材１０も、それに沿ったＵ字状に形成され
ていることである。本実施例によれば、光源２の形状に
対応して帯状部材１０を形成させるので、前記実施例と
同様の効果が得られ、輝度ムラは改善される。The feature of this embodiment is that, for example, when the light source 2 formed in a U-shape is used, the plurality of band-shaped members 10 constituting the light selecting member 42 are also formed in a U-shape along the same. It is. According to this embodiment, since the belt-shaped member 10 is formed corresponding to the shape of the light source 2, the same effect as that of the above-described embodiment is obtained, and luminance unevenness is improved.
【００５２】[0052]
【発明の効果】以上のように本発明によれば、光源光を
拡散する光拡散部材と、光源光を選択的に透過および遮
断する光選択部材との働きにより輝度ムラを改善するこ
とができる。As described above, according to the present invention, brightness unevenness can be improved by the function of the light diffusing member for diffusing the light from the light source and the light selecting member for selectively transmitting and blocking the light from the light source. .
【００５３】また、光選択部材は、透光性基板の表面と
裏面とで互いに重なり合わないように配置される光反射
性を有する複数の帯状部材を含んでいるので、輝度ムラ
をさらに改善することができる。Further, since the light selecting member includes a plurality of light-reflective belt-like members arranged so as not to overlap each other on the front surface and the back surface of the light-transmitting substrate, the luminance unevenness is further improved. be able to.
【００５４】さらに本発明によれば、帯状部材は、光源
の形状に沿って配置されているので、光源の形状に関係
なく輝度ムラを改善することができる。とりわけ、光源
の形状によって輝度ムラに大きな影響を与える直下型平
面光源装置に対して有効である。Further, according to the present invention, since the belt-shaped member is arranged along the shape of the light source, it is possible to improve the uneven brightness regardless of the shape of the light source. In particular, it is effective for a direct-type flat light source device that greatly affects luminance unevenness depending on the shape of the light source.
【００５５】さらにまた本発明によれば、帯状部材の幅
は光源から遠ざかるにつれて小さく、その配置間隔は光
源から遠ざかるにつれて大きくなっているので、輝度ム
ラを殆どなくすことができる。Further, according to the present invention, the width of the belt-shaped member becomes smaller as the distance from the light source increases, and the arrangement interval increases as the distance from the light source increases, so that luminance unevenness can be almost eliminated.
【００５６】さらにまた本発明によれば、帯状部材自体
が導電性を有し、かつ直接接地電位に接続されているの
で、先行技術に比べ部品点数が少なく、配線も容易でコ
スト的に有利である上、光源から放出される電気ノイズ
が低減されるので、透過型表示パネルのちらつきを軽減
することができる。なお、もしも製造上や使用上の過誤
により帯状部材の一部が切断されても、他の経路により
アース部に接地させることができる。Further, according to the present invention, since the belt-shaped member itself has conductivity and is directly connected to the ground potential, the number of parts is smaller than that of the prior art, wiring is easy, and cost is advantageous. In addition, since electric noise emitted from the light source is reduced, flickering of the transmissive display panel can be reduced. Even if a part of the belt-shaped member is cut due to an error in manufacturing or use, the belt-shaped member can be grounded to the grounding portion through another route.
【００５７】さらにまた本発明によれば、熱伝導率の比
較的高い帯状部材によって光源からの熱を外部に放熱で
きるので、平面光源装置内の温度が異常に高くなるため
に起こる表示パネルへの影響を軽減することができる。Further, according to the present invention, since the heat from the light source can be radiated to the outside by the belt-shaped member having a relatively high thermal conductivity, the temperature of the display panel caused by an abnormally high temperature in the flat light source device can be reduced. The effect can be reduced.
【図１】本発明の一実施例である平面光源装置１の平面
図である。FIG. 1 is a plan view of a flat light source device 1 according to one embodiment of the present invention.
【図２】図１に示す切断面線Ｉ−Ｉから見た平面光源装
置１の断面図である。FIG. 2 is a cross-sectional view of the flat light source device 1 taken along the line II shown in FIG.
【図３】図１に示す切断面線ＩＩ−ＩＩから見た平面光
源装置１の断面図である。FIG. 3 is a cross-sectional view of the flat light source device 1 taken along line II-II shown in FIG.
【図４】図１に示す光選択部材６の平面図である。FIG. 4 is a plan view of the light selection member 6 shown in FIG.
【図５】図４に示す切断面線ＩＩＩ−ＩＩＩから見た光
選択部材６の断面図である。FIG. 5 is a cross-sectional view of the light selection member 6 taken along the line III-III shown in FIG.
【図６】図４に示す切断面線ＩＶ−ＩＶから見た光選択
部材６の断面図である。FIG. 6 is a cross-sectional view of the light selection member 6 as viewed from a section line IV-IV shown in FIG.
【図７】図４に示す複数の帯状部材１０の接続部分を示
す拡大平面図である。FIG. 7 is an enlarged plan view showing a connection portion of a plurality of band-shaped members 10 shown in FIG.
【図８】前記光選択部材６の光学的特性を説明するため
の断面図である。FIG. 8 is a cross-sectional view for explaining the optical characteristics of the light selection member 6.
【図９】本発明の他の実施例である平面光源装置に使用
される光選択部材４１の平面図である。FIG. 9 is a plan view of a light selection member 41 used in a flat light source device according to another embodiment of the present invention.
【図１０】本発明のさらに他の実施例である平面光源装
置に使用される光選択部材４２の平面図である。FIG. 10 is a plan view of a light selection member used in a flat light source device according to still another embodiment of the present invention.
１ 平面光源装置 ２ 光源 ３ 表示パネル ４ 反射部材 ５ 光拡散部材 ６，４１，４２ 光選択部材 ７ 配線 ８ 放熱部材 ９ 透光性基板 １０，１０ａ，１０ｂ，２１，２２Ｌ，２２Ｒ，２３
Ｌ，２３Ｒ，３１Ｌ，３１Ｒ，３２Ｌ，３２Ｒ，３３
Ｌ，３３Ｒ 帯状部材Reference Signs List 1 plane light source device 2 light source 3 display panel 4 reflection member 5 light diffusion member 6, 41, 42 light selection member 7 wiring 8 heat radiation member 9 translucent substrate 10, 10a, 10b, 21, 22L, 22R, 23
L, 23R, 31L, 31R, 32L, 32R, 33
L, 33R strip
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G02F 1/13357 F21V 8/00 G02B 6/00 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) G02F 1/13357 F21V 8/00 G02B 6/00
Claims (6)
源装置において、 光源と、 前記光源を外囲し、前記予め定める照射面側に開口部を
有する反射部材と、 前記光源と、前記予め定める照射面との間に配置され、
光源光を拡散する光拡散部材と、 前記光源と、前記光拡散部材との間に配置され、光源光
を選択的に透過および遮断することによる輝度ムラ改善
機能を有する光選択部材であって、透光性基板と、前記
透光性基板の表裏両面にそれぞれ配置され、遮光性材料
から成り、その表面は光反射性を有する複数の帯状部材
とを含み、前記帯状部材は、前記透光性基板の表面と裏
面とでは、互いに重なり合わないように配置される光選
択部材とを含むことを特徴とする平面光源装置。1. A flat light source device for irradiating a predetermined irradiation surface with light, wherein: a light source; a reflecting member surrounding the light source and having an opening on the predetermined irradiation surface side; Placed between the irradiation surface
A light diffusing member that diffuses light from the light source; and a light selecting member that is disposed between the light source and the light diffusing member and has a brightness nonuniformity improving function by selectively transmitting and blocking light from the light source. A light-transmitting substrate, each of which is disposed on the front and back surfaces of the light-transmitting substrate, is made of a light-shielding material, and includes a plurality of band-shaped members having a light-reflecting surface; A flat light source device, comprising: a light selection member arranged so that the front surface and the back surface of the substrate do not overlap each other.
状に選ばれることを特徴とする請求項１記載の平面光源
装置。2. The flat light source device according to claim 1, wherein the band-shaped member is selected to have a shape following the shape of the light source.
につれて、小さく選ばれることを特徴とする請求項１記
載の平面光源装置。3. The flat light source device according to claim 1, wherein the width of the band-shaped member is selected to be smaller as the distance from the light source increases.
ざかるにつれて、大きく選ばれることを特徴とする請求
項１記載の平面光源装置。4. The flat light source device according to claim 1, wherein an arrangement interval of the belt-like members is selected to be larger as the distance from the light source increases.
源装置において、 光源と、 前記光源を外囲し、前記予め定める照射面側に開口部を
有する反射部材と、 前記光源と、前記予め定める照射面との間に配置され、
光源光を拡散する光拡散部材と、 前記光源と、前記光拡散部材との間に配置され、光源光
を選択的に透過および遮断する光選択部材であって、透
光性基板と、前記透光性基板の表裏両面にそれぞれ配置
され、遮光性材料から成り、その表面は光反射性を有す
る複数の帯状部材とを含み、前記帯状部材は、前記透光
性基板の表面と裏面とでは、互いに重なり合わないよう
に配置され、該帯状部材は、導電性を有し、かつ接地電
位に接続されている光選択部材とを含むことを特徴とす
る平面光源装置。5. A flat light source device for irradiating a predetermined irradiation surface with light, comprising: a light source; a reflecting member surrounding the light source and having an opening on the predetermined irradiation surface side; Placed between the irradiation surface
A light diffusing member for diffusing light from the light source; a light selecting member disposed between the light source and the light diffusing member for selectively transmitting and blocking the light from the light source; Each is disposed on the front and back surfaces of the light-transmitting substrate, is made of a light-shielding material, the surface of which includes a plurality of band members having light reflectivity, and the band members are the front and back surfaces of the light-transmitting substrate. The flat light source device is arranged so as not to overlap with each other, and the band-shaped member includes a light-selecting member having conductivity and connected to a ground potential.
材料から成ることを特徴とする請求項５記載の平面光源
装置。6. The flat light source device according to claim 5, wherein said belt-shaped member is made of a material having a relatively high thermal conductivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06168403A JP3073132B2 (en) | 1994-07-20 | 1994-07-20 | Flat light source device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06168403A JP3073132B2 (en) | 1994-07-20 | 1994-07-20 | Flat light source device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0829785A JPH0829785A (en) | 1996-02-02 |
| JP3073132B2 true JP3073132B2 (en) | 2000-08-07 |
Family
ID=15867480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06168403A Expired - Fee Related JP3073132B2 (en) | 1994-07-20 | 1994-07-20 | Flat light source device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3073132B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102498331A (en) * | 2009-09-16 | 2012-06-13 | 夏普株式会社 | Lighting device, display apparatus, and television receiver |
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|---|---|---|---|---|
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| KR100774579B1 (en) * | 2002-10-25 | 2007-11-09 | 삼성전자주식회사 | Back light assembly and liquid crystal display having the same |
| US6974229B2 (en) * | 2003-05-21 | 2005-12-13 | Lumileds Lighting U.S., Llc | Devices for creating brightness profiles |
| TWI288277B (en) * | 2004-02-20 | 2007-10-11 | Jr-Yung Liou | Flat light source with high brightness and high uniformity |
| JP4362410B2 (en) | 2004-04-22 | 2009-11-11 | Ｎｅｃ液晶テクノロジー株式会社 | Backlight device and liquid crystal display device |
| JP4627151B2 (en) * | 2004-05-28 | 2011-02-09 | 株式会社 日立ディスプレイズ | Liquid crystal display device |
| KR100657284B1 (en) * | 2004-11-03 | 2006-12-14 | 삼성전자주식회사 | Back light unit and liquid display apparatus employing it |
| WO2007049373A1 (en) * | 2005-10-27 | 2007-05-03 | Sharp Kabushiki Kaisha | Light source, and display and television receiver both using the same |
| JP4652970B2 (en) * | 2005-12-27 | 2011-03-16 | 富士フイルム株式会社 | Surface lighting device |
| JP4701334B2 (en) * | 2006-01-27 | 2011-06-15 | 株式会社オプトデザイン | Surface illumination light source device and surface illumination device using the same |
| JP4280283B2 (en) * | 2006-01-27 | 2009-06-17 | 株式会社オプトデザイン | Surface illumination light source device and surface illumination device using the same |
| KR20100038684A (en) * | 2008-10-06 | 2010-04-15 | 삼성전자주식회사 | Back light unit and image display device using thereof |
| KR20120019467A (en) | 2009-06-03 | 2012-03-06 | 샤프 가부시키가이샤 | Illuminating device, display device and television device |
| JP4963726B2 (en) * | 2010-03-15 | 2012-06-27 | 富士フイルム株式会社 | Surface illumination device and liquid crystal display device |
| CN111010173B (en) * | 2019-12-20 | 2023-05-23 | 湖北大学 | Adaptive fractional frequency synthesizer burr removal system and method |
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1994
- 1994-07-20 JP JP06168403A patent/JP3073132B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102498331A (en) * | 2009-09-16 | 2012-06-13 | 夏普株式会社 | Lighting device, display apparatus, and television receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0829785A (en) | 1996-02-02 |
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