JPH04145485A - Light source device - Google Patents
Light source deviceInfo
- Publication number
- JPH04145485A JPH04145485A JP2267999A JP26799990A JPH04145485A JP H04145485 A JPH04145485 A JP H04145485A JP 2267999 A JP2267999 A JP 2267999A JP 26799990 A JP26799990 A JP 26799990A JP H04145485 A JPH04145485 A JP H04145485A
- Authority
- JP
- Japan
- Prior art keywords
- light
- light source
- source device
- fine particles
- light guide
- 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
- 239000010419 fine particle Substances 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 8
- 229920003023 plastic Polymers 0.000 claims abstract description 8
- 238000000149 argon plasma sintering Methods 0.000 claims abstract description 6
- 239000004033 plastic Substances 0.000 claims abstract description 6
- 238000009792 diffusion process Methods 0.000 claims description 21
- 239000000113 methacrylic resin Substances 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 229920005990 polystyrene resin Polymers 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- 239000004431 polycarbonate resin Substances 0.000 claims description 2
- 229920005668 polycarbonate resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 229920002050 silicone resin Polymers 0.000 claims description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims 2
- 238000007639 printing Methods 0.000 abstract description 3
- 239000002270 dispersing agent Substances 0.000 abstract 1
- 238000000691 measurement method Methods 0.000 description 9
- 239000003795 chemical substances by application Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Inorganic materials [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000019329 dioctyl sodium sulphosuccinate Nutrition 0.000 description 1
- YHAIUSTWZPMYGG-UHFFFAOYSA-L disodium;2,2-dioctyl-3-sulfobutanedioate Chemical compound [Na+].[Na+].CCCCCCCCC(C([O-])=O)(C(C([O-])=O)S(O)(=O)=O)CCCCCCCC YHAIUSTWZPMYGG-UHFFFAOYSA-L 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002685 polymerization catalyst Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Light Guides In General And Applications Therefor (AREA)
- 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１
本発明は表面に光拡散処理が施された導光体に光源から
の光を入射して光出射面から光を出射する光源装置に関
する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a light source device that enters light from a light source into a light guide whose surface has been subjected to light diffusion treatment and emits the light from a light output surface.
［従来の技術］
従来から、薄型の看板、表示装置、照明器具、液晶表示
装置の背面光源等に用いられる光源装置として、導光体
に光源からの光を入射して任意の形状又はパターンで発
光させるものが知られている。このような光源装置にお
ける導光体は、できるだけ光を吸収することのないもの
か望ましいので、透明性の優れたメタクリル樹脂が用い
られている。この種の光源装置としては、より輝度が高
く、よりコンパクトであることが求められている。[Prior Art] Conventionally, as a light source device used for thin signboards, display devices, lighting equipment, back light sources of liquid crystal display devices, etc., light from a light source is incident on a light guide to form an arbitrary shape or pattern. Things that emit light are known. It is desirable that the light guide in such a light source device absorb as little light as possible, so methacrylic resin with excellent transparency is used. This type of light source device is required to have higher brightness and be more compact.
［発明が解決しようとする課題］
しかしながら、従来の光源装置の方式では輝度を高くす
ることに限界かあり、より輝度の高い高性能な光源装置
の出現が望まれていた。[Problems to be Solved by the Invention] However, there is a limit to how much brightness can be increased with conventional light source device systems, and there has been a desire for a high-performance light source device with even higher brightness.
本発明の目的は、より輝度の高い高性能な光源装置を提
供することにある。An object of the present invention is to provide a high-performance light source device with higher brightness.
［課題を解決するための手段及び作用１上記目的は、表
面に光拡散処理が施された導光体に光源からの光を入射
し、前記導光体の光出射面から光を出射する光源装置に
おいて、前記導光体は、内部に屈折率の興なる微粒子が
包含された光散乱性を有するプラスチック材料により形
成されていることを特徴とする光源装置によって達成さ
れる。[Means and Effects for Solving the Problems 1] The above object is to provide a light source in which light from a light source is incident on a light guide whose surface is subjected to light diffusion treatment, and the light is emitted from a light output surface of the light guide. The present invention is achieved by a light source device characterized in that the light guide is formed of a plastic material having light scattering properties and containing fine particles having a high refractive index therein.
以下、本発明の構成について詳細に説明する。Hereinafter, the configuration of the present invention will be explained in detail.
本発明による光源装置の一例を第１図に示す。An example of a light source device according to the present invention is shown in FIG.
冷陰極管の光源１０に導光体１２が接して設けられてい
る。導光体１２の下面には光拡散層１４が形成されて光
拡散処理か施されている。光拡散層１４は微粒子を含む
拡散剤を含有する拡散性インキ等で導光体１２下面を印
刷することにより形成する。A light guide 12 is provided in contact with a cold cathode tube light source 10. A light diffusion layer 14 is formed on the lower surface of the light guide 12 and subjected to light diffusion treatment. The light diffusing layer 14 is formed by printing the lower surface of the light guide 12 with a diffusive ink containing a diffusing agent containing fine particles.
光拡散層１４の代わりに導光体１２の下面に微細な凹凸
を形成して表面に光拡散処理を施すようにしてもよい。Instead of the light diffusion layer 14, fine irregularities may be formed on the lower surface of the light guide 12, and the surface may be subjected to light diffusion treatment.
微細な凹凸を形成する方法としては、サンドゲラスト、
印刷等のような後処理、パターンロールによる熱転写処
理、凹凸のあるセルによるキャスト等の種々の方法かあ
る。Methods for forming fine irregularities include sand gelast,
There are various methods such as post-processing such as printing, thermal transfer processing using a pattern roll, and casting using uneven cells.
導光体１２下面の光拡散Ｆ１１４の下面には必要に応じ
て反射膜１６が形成され、導光体１２の光出射面上には
光拡散板１８が載置されている。光源１０及び導光体１
２は光源装置の外囲器２０に収納され固定されている。A reflective film 16 is formed on the lower surface of the light diffusing F114 on the lower surface of the light guide 12, if necessary, and a light diffusing plate 18 is placed on the light exit surface of the light guide 12. Light source 10 and light guide 1
2 is housed and fixed in the envelope 20 of the light source device.
光源１０から導光体１２に入射された光は、光拡散処理
した面で拡散されると共に反射膜１６で反射されること
により、導光体１２の光出射面から光が出射する。導光
体１２からの出射光は光拡散板１８により輝度のムラが
少なくなる。The light incident on the light guide 12 from the light source 10 is diffused by the light diffusion-treated surface and reflected by the reflective film 16, so that the light is emitted from the light exit surface of the light guide 12. The light emitted from the light guide 12 has less uneven brightness due to the light diffusing plate 18.
本発明の光源装置の導光体１２は、内部に屈折率の異な
る微粒子が包含された光散乱性を有するプラスチック材
料により形成されていることを特徴としている。したが
って、導光体１２内部でも、包含された微粒子により光
が散乱され、光出射面から出射される光の輝度がより高
くなる。The light guide 12 of the light source device of the present invention is characterized by being formed of a plastic material having light scattering properties and containing fine particles having different refractive indexes therein. Therefore, light is scattered by the included fine particles inside the light guide 12, and the brightness of the light emitted from the light emitting surface becomes higher.
導光体１２内部に分散されたＲ粒子の量は、表面に光拡
散処理か施されず微粒子が包含されているときの導光体
１２の出射光の輝度が、表面に光拡散処理が施され微粒
子を包含しないときの導光体１２の出射光の輝度の２〜
１０％になるような量であることが望ましい、出射光の
輝度の２％より小さいと微粒子を包含したことによる輝
度向上効果が小さくなり、１０％より大きいと光源１０
に近いところのみが明るくなり輝度にムラを生ずるから
である。 導光体１２の製造方法としては、拡散剤を含
有させた材料を重合させる他に、押出し成型による方法
、射出成型による方法でもよい。The amount of R particles dispersed inside the light guide 12 is such that the brightness of the light emitted from the light guide 12 when the surface is not subjected to light diffusion treatment and contains fine particles is the same as the brightness of the light emitted from the light guide 12 when the surface is not subjected to light diffusion treatment and contains fine particles. 2 to 2 of the brightness of the light emitted from the light guide 12 when no fine particles are included.
It is desirable that the amount is 10% of the luminance of the emitted light.If it is less than 2% of the luminance of the emitted light, the luminance improvement effect due to the inclusion of fine particles will be small, and if it is greater than 10%, the light source 10
This is because only areas close to the area become brighter, causing uneven brightness. The light guide 12 may be manufactured by extrusion molding or injection molding, in addition to polymerizing a material containing a diffusing agent.
光源１０としては第１図で例示した冷陰極管の他に、蛍
光ランプ等の線状光源でもよいし、ハロゲンランプ等の
ような点状光源でしよい。また、導光体１２の形状も第
１図で例示した四角板形状の他に、任意の板形状や棒形
状のように、必要に応じたいかなる形状でもよ〜）。In addition to the cold cathode tube illustrated in FIG. 1, the light source 10 may be a linear light source such as a fluorescent lamp, or a point light source such as a halogen lamp. Moreover, the shape of the light guide 12 may be any shape according to need, such as an arbitrary plate shape or a bar shape, in addition to the square plate shape illustrated in FIG. 1).
導光体１２の材料としては、透明性プラスチックであれ
ばいかなるプラスチックでもよいが、メタクリル樹脂、
ポリスチレン樹脂、ＭＳ樹脂、ポリカーボネイト樹脂等
が望ましい。The light guide 12 may be made of any transparent plastic, including methacrylic resin,
Polystyrene resin, MS resin, polycarbonate resin, etc. are desirable.
導光体１２内部に分散された微粒子は、光拡散させるた
めに、透明性プラスチックと屈折率の異なる屈折率の材
料で形成されている。例えば、酸化チタン、シリカ、ｉ
ｔバリウム、炭酸カルシウム等の無機微粒子や、メタク
リル樹脂、ポリスチレン樹脂、シリコン樹脂等の有機微
粒子であって、平均粒径が０．１〜２０μｍであること
が望ましい、平均粒径が０．１μｍより小さいと光散乱
の程度に波長依存性が大きくなり光源１０の色より黄色
が強くなり、平均粒径が２０μｍより大きいと散乱光の
ムラが目立ち過ぎるからである。The fine particles dispersed inside the light guide 12 are made of a material having a refractive index different from that of transparent plastic in order to diffuse light. For example, titanium oxide, silica, i
Inorganic fine particles such as barium and calcium carbonate, organic fine particles such as methacrylic resin, polystyrene resin, silicone resin, etc., preferably with an average particle size of 0.1 to 20 μm, and with an average particle size of 0.1 μm or more. This is because if the particle size is too small, the degree of light scattering will be highly dependent on the wavelength and the color will be more yellow than the color of the light source 10, and if the average particle size is larger than 20 μm, the unevenness of the scattered light will be too noticeable.
［実施例］
導光板の製造方法
メタクリル酸メチル部分重合体く本号率２０％）を１０
０重量部に、表に示した拡散剤を表に示した濃度だけ加
え、セルキャストの常法にしたがつて、重合触媒として
アゾビスイソブチロニトリルを０．０５重量部、紫外線
吸収剤として２−（５メチル−２−ヒドロキシフェニル
）〜ベンゾトリニアゾールを０．００５重量部、離型剤
としてジオクチルスルフォコハク酸ナトリウムを０．０
０１重量部だけ添加して撹拌する。脱気後厚さ６ｍｍの
ガラス板２枚と周囲を塩化ビニール製のチューブで構成
されたセルの中に注入し、７０℃の水浴重合により２時
間、続いて１２０℃の空気浴重合で２時間かけて重合を
完結させて、厚さ３ｍｍのメタクリル樹脂板を作成した
。比較例１は拡散剤を加えない以外は実施例１〜１４と
同様である。[Example] Manufacturing method of light guide plate Methyl methacrylate partial polymer
To 0 parts by weight, add the diffusing agent shown in the table at the concentration shown in the table, and add 0.05 parts by weight of azobisisobutyronitrile as a polymerization catalyst and 0.05 part by weight of azobisisobutyronitrile as a UV absorber according to the usual Cell Cast method. 0.005 parts by weight of 2-(5methyl-2-hydroxyphenyl) to benzotriniazole and 0.0 part of sodium dioctyl sulfosuccinate as a mold release agent.
Add only 1 part by weight and stir. After degassing, two glass plates with a thickness of 6 mm and their surroundings were poured into a cell made of a vinyl chloride tube, and polymerized in a water bath at 70°C for 2 hours, followed by polymerization in an air bath at 120°C for 2 hours. Polymerization was completed over a period of time, and a methacrylic resin plate with a thickness of 3 mm was created. Comparative Example 1 is the same as Examples 1 to 14 except that no diffusing agent is added.
光拡散処理の方法
メタクリル樹脂板の背面に、拡散剤を有する帝国インキ
製造株式会社製のセリコール１３−マッドメジューム８
０％とセリコール１３−遅ロコンパウンド２０％を混合
してインキとした。このインキの濃度が均一となるよう
な罰点グラデーションを施した２５０メツシユのスクリ
ーンを用いて光拡散層のスクリーン印刷を行った。Method of light diffusion treatment Sericol 13-Mad Medium 8 manufactured by Teikoku Ink Mfg. Co., Ltd., which has a diffusing agent on the back side of the methacrylic resin plate.
0% and 20% of Sericol 13-slow release compound were mixed to make an ink. A light-diffusing layer was screen printed using a 250-mesh screen with a dot gradation so that the ink concentration was uniform.
光反射層と光源の取付は
光拡散処理されたメタクリル樹脂板を縦２１５ｍｍ横１
７０ｍｍに切断し、入射面となる長辺側端面をサンドベ
ーパ及び羽咋により研磨する。表面に光拡散処理を總し
た側に反射率９１％のＡｇ蒸着フィルムで導光板を包ん
だ。長辺側端面から、光源として直径５．６ｍｍ、長さ
２７０ｍｍ、１２Ｖ２．ＩＷの冷陰極管を密着させ、管
電流を４゜７ｍＡとして光源装置を構成した。To attach the light reflection layer and light source, use a light diffusion-treated methacrylic resin plate with a length of 215 mm and a width of 1.
It is cut to 70 mm, and the long side end face, which will become the incident surface, is polished with a sand vapor and a blade. The light guide plate was wrapped with an Ag vapor-deposited film having a reflectance of 91% on the side that had been subjected to light diffusion treatment. From the long side end face, the light source has a diameter of 5.6 mm, a length of 270 mm, and a 12V2. A light source device was constructed by placing IW cold cathode tubes in close contact and setting the tube current to 4.7 mA.
輝度の測定方法
導光体の光入射面からの距離１０〜１６０ｍｍの輝度を
視野角１度の輝度計を用いて出射面方線方向から輝度を
測定し、その平均値を出射面方線方向の平均輝度とした
。測定方法Ａは導光板に光拡散層を形成しないで測定す
る輝度測定方法である。測定方法Ｂは導光板に光拡散層
を形成し、出射面に拡散板として透過率４５％、拡散率
７３％である厚さ２ｍｍのメタクリル樹脂板を使用した
測定方法である。How to measure brightness: Measure the brightness at a distance of 10 to 160 mm from the light incident surface of the light guide from the direction of the exit surface using a brightness meter with a viewing angle of 1 degree, and calculate the average value in the direction of the exit surface. The average brightness of Measurement method A is a brightness measurement method in which measurement is performed without forming a light diffusing layer on the light guide plate. Measurement method B is a measurement method in which a light diffusion layer is formed on a light guide plate, and a 2 mm thick methacrylic resin plate with a transmittance of 45% and a diffusion rate of 73% is used as a diffusion plate on the output surface.
実施例１〜１４のα［％］は、各実施例の測定方法Ａに
よる測定輝度を比較例１の測定方法Ｂによる測定輝度１
５３［ｎｔ］で割った値である。α [%] of Examples 1 to 14 is the luminance measured by measurement method A of each example compared to the luminance 1 measured by measurement method B of comparative example 1.
This is the value divided by 53 [nt].
第２図は、光源面から距離を横軸にし、測定方法Ｂによ
る測定輝度を縦軸にして、実施例２、実施例１１、比較
例１の測定値のグラフである。FIG. 2 is a graph of the measured values of Example 2, Example 11, and Comparative Example 1, with the horizontal axis representing the distance from the light source surface and the vertical axis representing the luminance measured by measurement method B.
光拡散処理方法がメタクリル樹脂板の背面に白色インキ
によりスクリーン印刷した点を除いては実施例１〜１４
と同じである。Examples 1 to 14 except that the light diffusion treatment method was screen printing with white ink on the back side of the methacrylic resin plate.
is the same as
比較例２は拡散剤を加えない点を除いて実施例１５．１
６と同様である。Comparative Example 2 is Example 15.1 except that no diffusing agent is added.
It is the same as 6.
実施例１５．１６のα（％）は、各実施例の測定方法Ａ
による測定輝度を比較例２の測定方法Ｂによる測定輝度
２８０［ｎｔ］で割った値である。α (%) in Examples 15 and 16 is determined by measurement method A of each example.
It is the value obtained by dividing the luminance measured by 280 [nt] by the luminance measured by measurement method B of Comparative Example 2.
［発明の効果］
以上の通り、本発明によれは、内部に屈折率の異なる微
粒子が包含された光散乱性を有するプラスチック材料に
より導光体を形成したので、出射光の輝度をより高くす
ることかできる。[Effects of the Invention] As described above, according to the present invention, the light guide is formed of a plastic material having light scattering properties and contains fine particles having different refractive indexes, thereby increasing the brightness of the emitted light. I can do it.
第１図は本発明による光源装置の一例を示す図、第２図
は本発明による光源装置の輝度を示すグラフである。
図において、
１０・・・光源
１２・・・導光体
１４・・・光拡散層
１６・・・反射膜
１８・・・光拡散板
２０・・・外囲器FIG. 1 is a diagram showing an example of a light source device according to the present invention, and FIG. 2 is a graph showing the brightness of the light source device according to the present invention. In the figure, 10...Light source 12...Light guide 14...Light diffusion layer 16...Reflection film 18...Light diffusion plate 20...Envelope
Claims (1)
を入射し、前記導光体の光出射面から光を出射する光源
装置において、 前記導光体は、内部に屈折率の異なる微粒子が包含され
た光散乱性を有するプラスチック材料により形成されて
いることを特徴とする光源装置。 ２、請求項１記載の光源装置において、 前記微粒子の量を、前記導光体の表面に光拡散処理が施
されず微粒子を包含するときの出射光の輝度が、前記導
光体の表面に光拡散処理が施され微粒子を包含しないと
きの出射光の輝度の２〜１０％になるように、定めたこ
とを特徴とする光源装置。 ３、請求項１又は２記載の光源装置において、前記導光
体の光出射面以外の面に反射膜を設けたことを特徴とす
る光源装置。 ４、請求項１乃至３のいずれかに記載の光源装置におい
て、 前記プラスチック材料は、メタクリル樹脂、ポリスチレ
ン樹脂、ＭＳ樹脂及びポリカーボネート樹脂からなる群
から選択される一種又はそれらの組合わせからなること
を特徴とする光源装置。 ５、請求項１乃至４のいずれかに記載の光源装置におい
て、 前記微粒子は、酸化チタン、シリカ、硫酸バリウム、炭
酸カルシウムの無機微粒子及びメタクリル樹脂、ポリス
チレン樹脂、シリコン樹脂の有機微粒子からなる群から
選択される一種又はそれらの組合わせからなり、平均粒
径が０．１〜２０μｍであることを特徴とする光源装置
。[Scope of Claims] 1. A light source device in which light from a light source is incident on a light guide whose surface has been subjected to light diffusion treatment, and the light is emitted from a light exit surface of the light guide, comprising: A light source device characterized in that it is formed of a plastic material having light scattering properties and containing fine particles having different refractive indexes therein. 2. The light source device according to claim 1, wherein the amount of the fine particles is determined by the brightness of the emitted light when the surface of the light guide contains fine particles without being subjected to light diffusion treatment. A light source device characterized in that the brightness is set to be 2 to 10% of the brightness of emitted light when it is subjected to light diffusion treatment and does not contain fine particles. 3. The light source device according to claim 1 or 2, wherein a reflective film is provided on a surface other than the light exit surface of the light guide. 4. The light source device according to any one of claims 1 to 3, wherein the plastic material is one selected from the group consisting of methacrylic resin, polystyrene resin, MS resin, and polycarbonate resin, or a combination thereof. Characteristic light source device. 5. The light source device according to any one of claims 1 to 4, wherein the fine particles are selected from the group consisting of inorganic fine particles of titanium oxide, silica, barium sulfate, and calcium carbonate, and organic fine particles of methacrylic resin, polystyrene resin, and silicone resin. A light source device comprising one selected from the group or a combination thereof, and having an average particle size of 0.1 to 20 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2267999A JPH04145485A (en) | 1990-10-05 | 1990-10-05 | Light source device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2267999A JPH04145485A (en) | 1990-10-05 | 1990-10-05 | Light source device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04145485A true JPH04145485A (en) | 1992-05-19 |
Family
ID=17452507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2267999A Pending JPH04145485A (en) | 1990-10-05 | 1990-10-05 | Light source device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04145485A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0694920A (en) * | 1992-09-09 | 1994-04-08 | Keiwa Shoko Kk | Light transmission plate |
| JPH07261122A (en) * | 1994-03-16 | 1995-10-13 | Enplas Corp | Surface light source device with polarizing function |
| US5899552A (en) * | 1993-11-11 | 1999-05-04 | Enplas Corporation | Surface light source device |
| US5982540A (en) * | 1994-03-16 | 1999-11-09 | Enplas Corporation | Surface light source device with polarization function |
| US5993020A (en) * | 1993-07-23 | 1999-11-30 | Nitto Jushi Kogyo Kabushiki Kaisha | Light scattering and guiding light source device and liquid crystal display |
| US6322225B1 (en) | 1993-12-17 | 2001-11-27 | Enplas Corporation | Light scattering guiding light source device and liquid crystal display |
| JP2002124112A (en) * | 2000-08-07 | 2002-04-26 | Sharp Corp | Backlight and liquid crystal display device |
| US7967492B2 (en) | 2005-02-28 | 2011-06-28 | Kuraray Co., Ltd. | Light diffusion film and planar light source element and liquid crystal display device utilizing the same |
| JP2013527968A (en) * | 2010-04-08 | 2013-07-04 | エボニック レーム ゲゼルシャフト ミット ベシュレンクテル ハフツング | Light guide with high light intensity and high transparency |
-
1990
- 1990-10-05 JP JP2267999A patent/JPH04145485A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0694920A (en) * | 1992-09-09 | 1994-04-08 | Keiwa Shoko Kk | Light transmission plate |
| US6290364B1 (en) | 1993-04-05 | 2001-09-18 | Enplas Corporation | Surface light source device |
| US5993020A (en) * | 1993-07-23 | 1999-11-30 | Nitto Jushi Kogyo Kabushiki Kaisha | Light scattering and guiding light source device and liquid crystal display |
| US5899552A (en) * | 1993-11-11 | 1999-05-04 | Enplas Corporation | Surface light source device |
| US6152570A (en) * | 1993-11-11 | 2000-11-28 | Enplas Corporation | Surface light source device |
| US6322225B1 (en) | 1993-12-17 | 2001-11-27 | Enplas Corporation | Light scattering guiding light source device and liquid crystal display |
| US6172809B1 (en) | 1994-03-16 | 2001-01-09 | Enplas Corporation | Surface light source device with polarization function |
| US5982540A (en) * | 1994-03-16 | 1999-11-09 | Enplas Corporation | Surface light source device with polarization function |
| JPH07261122A (en) * | 1994-03-16 | 1995-10-13 | Enplas Corp | Surface light source device with polarizing function |
| JP2002124112A (en) * | 2000-08-07 | 2002-04-26 | Sharp Corp | Backlight and liquid crystal display device |
| US7967492B2 (en) | 2005-02-28 | 2011-06-28 | Kuraray Co., Ltd. | Light diffusion film and planar light source element and liquid crystal display device utilizing the same |
| JP2013527968A (en) * | 2010-04-08 | 2013-07-04 | エボニック レーム ゲゼルシャフト ミット ベシュレンクテル ハフツング | Light guide with high light intensity and high transparency |
| EP2556395B1 (en) | 2010-04-08 | 2017-10-18 | Evonik Röhm GmbH | Light conduction body with high light intensity and high transparency |
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