JPH03196088A - Light source device - Google Patents
Light source deviceInfo
- Publication number
- JPH03196088A JPH03196088A JP1336075A JP33607589A JPH03196088A JP H03196088 A JPH03196088 A JP H03196088A JP 1336075 A JP1336075 A JP 1336075A JP 33607589 A JP33607589 A JP 33607589A JP H03196088 A JPH03196088 A JP H03196088A
- Authority
- JP
- Japan
- Prior art keywords
- light source
- light
- plate
- source device
- diffuser
- 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
Links
- 238000002834 transmittance Methods 0.000 abstract description 7
- 239000011347 resin Substances 0.000 abstract description 3
- 229920005989 resin Polymers 0.000 abstract description 3
- KEQXNNJHMWSZHK-UHFFFAOYSA-L 1,3,2,4$l^{2}-dioxathiaplumbetane 2,2-dioxide Chemical compound [Pb+2].[O-]S([O-])(=O)=O KEQXNNJHMWSZHK-UHFFFAOYSA-L 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
【発明の詳細な説明】 〈産業上の利用分野〉 この発明は光源装置に関する。[Detailed description of the invention] <Industrial application field> The present invention relates to a light source device.
〈従来の技術〉
近年パーソナルコンピュータの小型化が推進され、ラッ
プトツブ形といわれる携帯可能な機種が広く普及してい
る。このラップトツブ形においては、その表示は通常液
晶装置が用いられているが。<Prior Art> In recent years, personal computers have become more compact, and portable models called laptop-type computers have become widespread. In this laptop type, a liquid crystal device is usually used for the display.
近年のカラー表示化に伴い、液晶表示板の背後に光源を
配設し１表示面全体を裏側から照明するようにしたバッ
クライト形の表示装置が普及しつつある。2. Description of the Related Art With the trend toward color display in recent years, backlight type display devices in which a light source is disposed behind a liquid crystal display panel to illuminate an entire display surface from the back side are becoming popular.
このような表示装置のバックライトとしての光源は輝度
のムラなく平面全体を照明する必要があり、そのため従
来は光を拡散する拡散透光板を用いると共に、この透光
板にドツト状の非透過部を形成して、光の強い部分の光
透過率を減じることにより輝度の均一化を図っていた。The light source used as the backlight of such a display device needs to illuminate the entire plane without uneven brightness, so conventionally, a diffuser light-transmitting plate is used to diffuse the light, and a dot-shaped non-transparent dot is used on this light-transmissive plate. In this method, uniform brightness was achieved by reducing the light transmittance of areas with strong light.
〈発明が解決しようとする課題〉
しかし、上記した従来の構成では非光透過部を形成する
ために、フィルムの上にドツト状の非光透過部を印刷に
より形成し、これを拡散透光板に貼着するなどの工程が
必要であり、生産効率が悪い欠点があった。また、拡散
透光板上に非光透過部を形成するために、全体の輝度が
低下する欠点があった６
く課題を解決するための手段〉
本発明は上記した従来の光源装置の欠点を改善するため
になされたもので、光源と、光源からの距離に対応して
厚さの異なる部分を有する拡散透光板とを備えたことを
基本的な特徴とするものである。<Problems to be Solved by the Invention> However, in the conventional configuration described above, in order to form a non-light transmitting part, a dot-shaped non-light transmitting part is formed on the film by printing, and this is attached to a diffuser light transmitting plate. It requires a process such as pasting on the paper, which has the disadvantage of poor production efficiency. In addition, since the non-light transmitting portion is formed on the diffuser light transmitting plate, there is a drawback that the overall brightness decreases. This was developed in order to improve the light source, and its basic feature is that it includes a light source and a diffuser light-transmitting plate having portions with different thicknesses depending on the distance from the light source.
〈作用〉
光源からの光は拡散透光板で拡散され均一化される。ま
た拡散透光板上に形成された厚さの異なる部分により光
透過率が異なり、光源からの距離に応じた光透過率とす
ることが出来るから照度の均一化が図れる。<Operation> The light from the light source is diffused and made uniform by the diffuser-transmitting plate. Further, the light transmittance varies depending on the portions of different thickness formed on the diffuser light transmitting plate, and the light transmittance can be adjusted according to the distance from the light source, so that the illuminance can be made uniform.
〈実施例〉 以下本発明の実施例を図面に基づいて説明する。<Example> Embodiments of the present invention will be described below based on the drawings.
第１図と第２図において、枠体５の内部に光源１が４本
互いに平行に配設されている。この光源１としては管状
の冷陰極管を用いている。この光源１の上面に拡散透光
板２が装着されている。第２図においては説明のために
光源１を実線で表わしているが、光源１の上側に拡散透
光板２が設けられている。この拡散透光板２は全体が乳
白色の有機樹脂製の板であり、それ自体光源１がらの光
を拡散して外部に透過させる機能を有している。In FIGS. 1 and 2, four light sources 1 are arranged in parallel to each other inside a frame 5. As shown in FIG. As this light source 1, a tubular cold cathode tube is used. A diffuser light transmitting plate 2 is attached to the upper surface of this light source 1. In FIG. 2, the light source 1 is shown by a solid line for the sake of explanation, and a diffused light-transmitting plate 2 is provided above the light source 1. This diffused light transmitting plate 2 is a milky-white plate made of organic resin as a whole, and has the function of diffusing the light from the light source 1 and transmitting it to the outside.
拡散透光板２には光源１の直上の位置に肉厚部２０が形
成されている。この肉厚部２０は光源１に沿って縦長に
形成されており、第１図に示すように断面山形の形状を
なしている。そして、光源１と光源１の間に相当する位
置は通常の平板状の平板部２１になっている。この肉厚
部２ｏは前記した様に断面山形であり、拡散透光板２の
裏面が光源１に最も近接した位置において最大の肉厚の
頂点２２になり、光源１から離れるに従って肉薄になり
、平板部２１につながるようになっている。A thick portion 20 is formed on the diffuser light transmitting plate 2 at a position directly above the light source 1. This thick portion 20 is formed vertically along the light source 1, and has a chevron-shaped cross section as shown in FIG. A position corresponding to between the light sources 1 is a normal flat plate portion 21. As described above, this thick portion 2o has a chevron-shaped cross section, and has the maximum thickness at the apex 22 at the position where the back surface of the diffuser-transmitting plate 2 is closest to the light source 1, and becomes thinner as it moves away from the light source 1. It is connected to the flat plate part 21.
このような拡散透光板２はモールド成型法により製作す
ることも可能であるが、押し出し成型法により製作する
のが望ましく、この方法によれば一工程で簡単に且つウ
ェルド等光透過のムラの原因となる凹凸を生じる危険が
ない。Although it is possible to manufacture such a diffused light transmitting plate 2 by a molding method, it is preferable to manufacture it by an extrusion molding method.This method allows easy manufacturing in one step and eliminates unevenness in light transmission such as welding. There is no risk of causing unevenness.
光源１の下側には反射板３が設けられており、この反射
板３により光源１の光を拡散透光板２方向に反射させて
、照度を大きくするように構成されている０反射板３は
断面連続する山形形状をなしており、光源１の直下位置
が低い底部３１になっており、光源１．１の中間部に相
当する位置が最も高い頂部３０になっている。この頂部
３０は光源１の最高部よりも低い位置として光ムラが生
じないように配慮されている。A reflector plate 3 is provided below the light source 1, and the reflector plate 3 is configured to reflect the light from the light source 1 in the direction of the diffuser translucent plate 2 to increase the illuminance. 3 has a continuous chevron-shaped cross section, with a low bottom 31 located directly below the light source 1, and a highest top 30 located at the middle of the light source 1.1. The top portion 30 is located at a lower position than the highest portion of the light source 1 to prevent uneven light.
以上の構成において、光源１から発射された光は拡散透
光板２を透過して外部に放射される。この際拡散透光板
２の材質の性質自体により光源１からの光は第１次的に
拡散し、均一化する。そして同時に光源１に最も近い部
分は拡散透光板２の肉厚部２０があるため、この肉厚部
２０において光の透過が減じられて、光源１の直上部分
の光が最も強くなる等の光ムラが防止される。肉厚部２
０は断面山形をなしており、光源１から遠くなるに従っ
て、次第にその肉厚が薄くなり、光透過率が大きくなる
から、光源１からの光の強さに応じて拡散透光板２外面
に透過する光の強さが自動的に均一化される。In the above configuration, the light emitted from the light source 1 is transmitted through the light-diffusion plate 2 and radiated to the outside. At this time, the light from the light source 1 is primarily diffused and made uniform due to the properties of the material of the light-diffusion plate 2 itself. At the same time, since the part closest to the light source 1 is the thick part 20 of the diffuser transparent plate 2, the transmission of light is reduced in this thick part 20, and the light directly above the light source 1 becomes the strongest. Light unevenness is prevented. Thick part 2
0 has a chevron-shaped cross section, and the wall thickness gradually becomes thinner and the light transmittance increases as the distance from the light source 1 increases. The intensity of the transmitted light is automatically equalized.
また、光源１の下側に放射された光は反射板３で反射さ
れて拡散透光板２側へ放射される。この反射板３により
照度を向上させることができる。Further, the light emitted to the lower side of the light source 1 is reflected by the reflection plate 3 and emitted to the diffuser light transmitting plate 2 side. This reflector 3 can improve illuminance.
なお、拡散透光板２の厚さは薄いほど拡散透光板２面の
照度を大きくすることができるが、拡散透光板２の肉厚
部２０が補強材として機能するため、拡散透光板２の厚
さを従来の全体が平板状のものに比較して極めて薄くす
ることが可能である。Note that the thinner the diffuser light transmitting plate 2 is, the greater the illuminance on the surface of the diffuser light transmitter plate 2 can be. It is possible to make the thickness of the plate 2 extremely thin compared to a conventional plate-shaped plate.
その結果、従来のものより同一の光源について拡散透光
板２面上の照度を大きくすることが可能になる。As a result, it becomes possible to increase the illuminance on the two surfaces of the diffuser light transmitting plate for the same light source than in the conventional case.
次に第３図に他の実施例を示す、この実施例では平板部
２１を設けずに、拡散透光板２′全体に肉厚部２５と肉
薄部２６を交互に連続的に形成し、断面波状にしである
。この構成によれば、光源１と拡散透光板２′裏面との
距離に比例して拡散透先板２′全面に亘ってその肉厚が
変化するから、照度の均一が更に促進され光ムラの防止
効果が高くなる利点がある。Next, another embodiment is shown in FIG. 3. In this embodiment, the flat plate portion 21 is not provided, and thick portions 25 and thin portions 26 are alternately and continuously formed over the entire diffused light transmitting plate 2'. It has a wavy cross section. According to this configuration, the thickness of the diffuser transparent plate 2' changes in proportion to the distance between the light source 1 and the rear surface of the diffuser transparent plate 2', which further promotes uniformity of illuminance and reduces light unevenness. This has the advantage of increasing the prevention effect.
第４図に示す実施例では１反射板３の頂部３０の直上に
肉厚部２０より高さの低い第２肉厚部２３を設けた拡散
透光板２″をもちいている。この第２肉厚部２３により
頂部３０近傍で大きくなる照度を減じることができ、透
過光の均一化を更に促進することが可能になる。In the embodiment shown in FIG. 4, a diffuser light-transmitting plate 2'' is used in which a second thick part 23, which is lower in height than the thick part 20, is provided directly above the top part 30 of the first reflecting plate 3. The thick portion 23 can reduce the illuminance that increases in the vicinity of the top portion 30, making it possible to further promote uniformity of transmitted light.
〈発明の効果〉
以上説明したように本発明の光源装置は、光源と、光源
からの距離に対応して厚さの異なる部分を有する拡散透
光板とを備えているため、該拡散透光板上に形成された
厚さの異なる部分により光透過率が異なり、光源からの
距離に応じた光透過率とすることが出来、照度の均一化
を図ることが可能になる。<Effects of the Invention> As explained above, the light source device of the present invention includes a light source and a diffused light-transmitting plate having portions with different thicknesses depending on the distance from the light source. The light transmittance varies depending on the portions formed on the plate with different thicknesses, and the light transmittance can be adjusted according to the distance from the light source, making it possible to equalize the illuminance.
第１図は本発明の一実施例を示す断面図、第２図はその
平面図、第３図は他の実施例を示す断面図、第４図は更
に他の実施例を示す断面図である。
１：光源、２：拡散透光板、３：反射板、５：枠体、２
０：肉厚部、２１：平板部、２２：頂点１．２５：肉厚
部、２６：肉薄部、３ｏ：頂部、３１：底部。Fig. 1 is a sectional view showing one embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a sectional view showing another embodiment, and Fig. 4 is a sectional view showing still another embodiment. be. 1: Light source, 2: Diffuse transparent plate, 3: Reflector, 5: Frame, 2
0: Thick part, 21: Flat plate part, 22: Vertex 1.25: Thick part, 26: Thin part, 3o: Top part, 31: Bottom part.
Claims (1)
散透光板と、 を備えたことを特徴とする光源装置。 ２）平行に配設された複数の線状の光源と、該線状の光
源の上に配設され、線状の光源の直上に光源に沿って肉
厚部を形成した拡散透光板と、を備えたことを特徴とす
る光源装置。 ３）肉厚部が断面山形である請求項第２項に記載の光源
装置。 ４）拡散透光板が肉厚部と非肉厚部により断面波形形状
である請求項第２項に記載の光源装置。 ５）光源の周囲に反射板を配設した請求項第１項、第２
項、第３項又は第４項に記載の光源装置。[Scope of Claims] 1) A light source device comprising: a light source; and a diffuser transparent plate having portions with different thicknesses corresponding to distances from the light source. 2) A plurality of linear light sources arranged in parallel, and a diffused light transmitting plate arranged above the linear light sources and having a thick portion formed along the light sources directly above the linear light sources. A light source device comprising: 3) The light source device according to claim 2, wherein the thick portion has a chevron-shaped cross section. 4) The light source device according to claim 2, wherein the diffuser light transmitting plate has a wavy cross-sectional shape with a thick portion and a non-thick portion. 5) Claims 1 and 2, in which a reflecting plate is provided around the light source.
4. The light source device according to item 3, item 3, or item 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1336075A JPH03196088A (en) | 1989-12-25 | 1989-12-25 | Light source device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1336075A JPH03196088A (en) | 1989-12-25 | 1989-12-25 | Light source device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03196088A true JPH03196088A (en) | 1991-08-27 |
Family
ID=18295440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1336075A Pending JPH03196088A (en) | 1989-12-25 | 1989-12-25 | Light source device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03196088A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0742470A2 (en) * | 1995-05-05 | 1996-11-13 | Valeo Borg Instruments Verwaltung GmbH | Multicolour illumination apparatus |
| JP2003215585A (en) * | 2002-01-24 | 2003-07-30 | Sanyo Electric Co Ltd | Backlight for liquid crystal display |
| KR100460412B1 (en) * | 1997-06-27 | 2005-06-20 | 삼성전자주식회사 | Backlight Assembly |
| KR100514065B1 (en) * | 1997-10-08 | 2005-12-01 | 삼성전자주식회사 | Backlight Assembly for Liquid Crystal Display |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5713478A (en) * | 1980-06-26 | 1982-01-23 | Epson Corp | Back light structure for display unit |
-
1989
- 1989-12-25 JP JP1336075A patent/JPH03196088A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5713478A (en) * | 1980-06-26 | 1982-01-23 | Epson Corp | Back light structure for display unit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0742470A2 (en) * | 1995-05-05 | 1996-11-13 | Valeo Borg Instruments Verwaltung GmbH | Multicolour illumination apparatus |
| EP0742470A3 (en) * | 1995-05-05 | 1996-12-11 | Valeo Borg Instr Verw Gmbh | |
| KR100460412B1 (en) * | 1997-06-27 | 2005-06-20 | 삼성전자주식회사 | Backlight Assembly |
| KR100514065B1 (en) * | 1997-10-08 | 2005-12-01 | 삼성전자주식회사 | Backlight Assembly for Liquid Crystal Display |
| JP2003215585A (en) * | 2002-01-24 | 2003-07-30 | Sanyo Electric Co Ltd | Backlight for liquid crystal display |
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