JPH04280224A - Back light for panel - Google Patents
Back light for panelInfo
- Publication number
- JPH04280224A JPH04280224A JP3067698A JP6769891A JPH04280224A JP H04280224 A JPH04280224 A JP H04280224A JP 3067698 A JP3067698 A JP 3067698A JP 6769891 A JP6769891 A JP 6769891A JP H04280224 A JPH04280224 A JP H04280224A
- Authority
- JP
- Japan
- Prior art keywords
- light
- guide plate
- light guide
- light source
- plate
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 claims abstract description 32
- 238000000576 coating method Methods 0.000 claims abstract description 21
- 239000011248 coating agent Substances 0.000 claims abstract description 18
- 239000003973 paint Substances 0.000 claims description 7
- 238000009792 diffusion process Methods 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 10
- 238000000149 argon plasma sintering Methods 0.000 abstract description 6
- 239000004925 Acrylic resin Substances 0.000 abstract description 4
- 229920000178 Acrylic resin Polymers 0.000 abstract description 4
- 238000007650 screen-printing Methods 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 239000011521 glass Substances 0.000 abstract description 2
- 239000000025 natural resin Substances 0.000 abstract description 2
- 239000000049 pigment Substances 0.000 abstract description 2
- 238000007639 printing Methods 0.000 abstract description 2
- 239000010453 quartz Substances 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 229920003002 synthetic resin Polymers 0.000 abstract description 2
- 239000000057 synthetic resin Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 235000010215 titanium dioxide Nutrition 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、透過型又は、半透過型
パネルを背面より照射するパネル用バックライトに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a panel backlight that illuminates a transmissive or semi-transmissive panel from behind.
【０００２】0002
【従来の技術】近時、ラップトップ型又は、ブック型の
ワ−ドプロセッサ−やコンピュ−タ等の表示装置として
、薄型でしかも見易いバックライト機構を有する液晶表
示装置が用いられている。このようなバックライトには
、図１に示すように透光性の導光板の一端部に、蛍光管
のような線状光源を併設するエッジライト方式がよく用
いられる。このエッジライト方式の場合、図２に示すよ
うに、導光板の一方の広い面にこの導光板材料よりも屈
折率が大きい光拡散物質を部分的に被覆し、その面のほ
ぼ全面を光拡散反射板で覆うように配置されたものが多
い。この光拡散反射板で覆うことは、反射板での光拡散
効果を有効に活用するためである。2. Description of the Related Art Recently, liquid crystal display devices having a thin and easy-to-read backlight mechanism have been used as display devices for laptop-type or book-type word processors, computers, and the like. For such backlights, an edge light system is often used in which a linear light source such as a fluorescent tube is attached to one end of a transparent light guide plate, as shown in FIG. In the case of this edge-light method, as shown in Figure 2, one wide surface of the light guide plate is partially coated with a light diffusing material that has a higher refractive index than the light guide plate material, and almost the entire surface is used to diffuse light. Many are placed so that they are covered with a reflective plate. The purpose of covering with this light diffusing and reflecting plate is to effectively utilize the light diffusing effect of the reflecting plate.
【０００３】この光拡散反射板の表面は、通常光拡散性
を持つ材料で被覆されている。光拡散性を持つ材料は、
アルミニゥム板の表面を粗面化して光拡散性を持たした
もの、又は、光拡散性を持つ塗料等を塗布した光拡散板
等である。近時、バックライトがバッテリー駆動される
ようになり消費電力−輝度変換効率のより一層の向上が
望まれるようになると共に、更に輝度の高いバックライ
トが要求されるようになってきた。このような状況下で
、従来の光拡散性を持つ塗料等を塗布した光拡散板は、
塗布面の膜厚が１０〜２０μｍと比較的薄く、必ずしも
充分にこのような要求に応じられなくなっているのが現
状である。[0003] The surface of this light diffusing and reflecting plate is usually coated with a material having light diffusing properties. Materials with light diffusing properties are
These are aluminum plates with a roughened surface to provide light diffusing properties, or light diffusing plates coated with a paint having light diffusing properties. In recent years, backlights have come to be driven by batteries, and as a result, it has become desirable to further improve the power consumption-luminance conversion efficiency, and backlights with even higher luminance have been required. Under these circumstances, light diffusing plates coated with conventional light-diffusing paint, etc.
At present, the film thickness on the coated surface is relatively thin, 10 to 20 μm, and it is not always possible to fully meet these demands.
【０００４】0004
【発明が解決しようとする課題】本発明は、上述の問題
点につき種々の検討を行った結果、エッジライト方式の
バックライトにおいて、発光面全体に高輝度が得られる
パネル用バックライトを提供することが目的である。[Problems to be Solved by the Invention] As a result of various studies regarding the above-mentioned problems, the present invention provides a backlight for a panel that can provide high brightness over the entire light emitting surface in an edge-light type backlight. That is the purpose.
【０００５】[0005]
【課題を解決するための手段】本発明者らは、導光板上
の光拡散物質を被覆した一方の広い面に相対して配置す
る光拡散反射板の表面、及び／又は線状光源を覆う反射
板の光源に相対する面にある程度の厚さを持つように、
高い光拡散反射率を持つ材料を塗布したものを用いたパ
ネル用バックライトが上記目的に適うものであることを
見出だし本発明を完成した。即ち本発明は、透光性材料
からなる導光板の少なくとも一側面端部に、これに近接
して線状光源を有し、前記導光板の一方の広い面に該導
光板材料よりも屈折率が大きい光拡散物質を、導光板面
上において線状光源側の一側面端部からの距離が大とな
るに従って被覆の割合を増加させるように被覆し、その
面に相対して光拡散反射板を配したパネル用バックライ
トに於いて、前記線状光源を覆う反射板の光源に相対す
る面及び／又は前記光拡散反射板の表面に、高い光拡散
反射率を持つ材料を３０μｍ以上塗布したものを用いた
パネル用バックライトに関するものである。[Means for Solving the Problems] The present inventors have proposed a method for covering the surface of a light diffusing and reflecting plate disposed opposite to one wide surface coated with a light diffusing substance on a light guide plate, and/or covering a linear light source. The surface of the reflector facing the light source should have a certain thickness.
The inventors have discovered that a panel backlight coated with a material having high light diffusion and reflectance is suitable for the above purpose, and have completed the present invention. That is, the present invention has a linear light source on at least one side edge of a light guide plate made of a light-transmitting material, and has a linear light source in close proximity thereto, and one wide surface of the light guide plate has a refractive index higher than that of the light guide plate material. A light diffusing material with a large surface area is coated on the light guide plate surface in such a way that the coating ratio increases as the distance from the end of one side of the linear light source side increases, and a light diffusing and reflecting material is applied to the light guide plate surface opposite to that surface. In the backlight for a panel, a material having a high light diffusive reflectance is coated to a thickness of 30 μm or more on the surface facing the light source of the reflector covering the linear light source and/or the surface of the light diffusing reflector. This invention relates to a backlight for panels using a backlight.
【０００６】次に本発明を図面に基づいて更に詳述する
。Next, the present invention will be explained in more detail based on the drawings.
【０００７】図１は、本発明の一実施態様の斜視図であ
り、図２は、同断面図である。図中１は導光板であり、
光を効率よく通過させる物質であればよく、石英、ガラ
ス、透光性の天然又は合成樹脂、例えばアクリル系樹脂
等である。２は光拡散板で、導光板面より出光した光を
散乱させて通過させるものである。本発明では１枚又は
複数枚の光拡散板を用いる。FIG. 1 is a perspective view of one embodiment of the present invention, and FIG. 2 is a sectional view thereof. 1 in the figure is a light guide plate,
Any material that allows light to pass through efficiently may be used, such as quartz, glass, translucent natural or synthetic resin, such as acrylic resin, etc. Reference numeral 2 denotes a light diffusing plate, which scatters the light emitted from the light guide plate surface and allows it to pass through. In the present invention, one or more light diffusing plates are used.
【０００８】導光板に施す光散乱物質６は、導光板の材
質に比較して高屈折率を持ち、かつ拡散反射率が大きい
顔料を含んだ塗料、印刷インキ等が好ましい。これらを
スクリ−ン印刷等の方法で導光板面上にドット状に印刷
する。光拡散反射板３は、アルミニウム、薄板鋼等の材
質からなり、光散乱物質を被覆した導光板の面のほぼ全
面を覆うように配置する。The light scattering material 6 applied to the light guide plate is preferably a paint, printing ink, or the like containing a pigment that has a higher refractive index than the material of the light guide plate and has a large diffuse reflectance. These are printed in the form of dots on the surface of the light guide plate using a method such as screen printing. The light diffusing and reflecting plate 3 is made of a material such as aluminum or thin plate steel, and is arranged so as to cover almost the entire surface of the light guide plate coated with a light scattering substance.
【０００９】４は線状光源で、導光板の端面に光が入光
するための間隙（スリット）を有するアルミニウム等の
金属板等で構成された反射板５で周囲を覆われ、導光板
の一端面部に近接してその中心軸が導光板の端面とほぼ
平行となるように設置される。この線状光源４は、蛍光
管、タングステン白熱管、オプティカルロッド、ＬＥＤ
を配列した物等があるが、蛍光管が好ましい。Reference numeral 4 denotes a linear light source, which is surrounded by a reflecting plate 5 made of a metal plate such as aluminum having a gap (slit) for light to enter the end face of the light guide plate. It is installed close to one end surface so that its central axis is substantially parallel to the end surface of the light guide plate. This linear light source 4 can be a fluorescent tube, a tungsten incandescent tube, an optical rod, or an LED.
There are fluorescent tubes, but fluorescent tubes are preferable.
【００１０】本発明では、前記した、線状光源を覆う反
射板５の内面、即ち光源と相対する面及び／又は光拡散
反射板３の導光板と相対する表面に、高い光拡散反射率
を持つ材料を或る厚みの範囲で塗布したことが特徴であ
る。ここで用いる高い光拡散反射率を持つ材料は通常用
いられる白色の塗料例えばチタンホワイトを用いた塗料
で、好ましくは密着性のある高分子材料例えばアクリル
系樹脂をこれと用いた塗料である。In the present invention, a high light diffusing reflectance is provided on the inner surface of the reflecting plate 5 covering the linear light source, that is, the surface facing the light source and/or the surface facing the light guide plate of the light diffusing reflecting plate 3. It is characterized by the fact that the material is applied within a certain thickness range. The material having a high light diffusion reflectance used here is a commonly used white paint such as titanium white, and preferably a paint using an adhesive polymeric material such as an acrylic resin.
【００１１】前記材料のこれら表面への塗布するさいの
膜厚は、通常３０μｍ以上、好ましくは３０〜１５０μ
ｍの範囲である。前記膜厚が３０μｍより薄いと光拡散
効果が充分でなく、高い輝度が得られない。又、必要以
上に厚くすることも、塗布作業が困難となるばかりでな
くそれなりの効果が得られない。前記塗布の方法は、通
常の方法でよいか、特に厚い膜厚を得る方法の一っであ
る粉体塗装方法が好ましい。[0011] The film thickness when the above-mentioned material is applied to these surfaces is usually 30 μm or more, preferably 30 to 150 μm.
m range. If the film thickness is less than 30 μm, the light diffusion effect will not be sufficient and high brightness will not be obtained. Furthermore, if the coating is made thicker than necessary, not only will the coating operation become difficult, but the desired effect will not be obtained. The coating method may be a conventional method, or preferably a powder coating method, which is one of the methods for obtaining a particularly thick film.
【００１２】本発明の導光板に施す光拡散物質は、好ま
しくはドット状即ち点状形成するものであるが、このド
ットの形状は特に制限されるものでなく、円形、角形、
交差線で形成されたいづれでもよい。これらは導光板上
に仮想される一定の間隔を持った直交線の交点（グリッ
ド）上に施されるが、直交線の間隔は０．５〜３ｍｍ更
に好ましくは０．８〜２ｍｍの間で導光板の厚さに応じ
て適宜選択される。The light diffusing substance applied to the light guide plate of the present invention is preferably formed in the form of dots, but the shape of the dots is not particularly limited and may be circular, square,
Any form of intersecting lines may be used. These are applied on the intersections (grids) of orthogonal lines that are imaginably spaced on the light guide plate, and the intervals between the orthogonal lines are between 0.5 and 3 mm, preferably between 0.8 and 2 mm. It is appropriately selected depending on the thickness of the light guide plate.
【００１３】更に、前記光拡散物質の被覆状態は、導光
板面上の線状光源部近傍で被覆の割合が１％〜５０％で
、光源から線状光源を近接させた一側面端部の被覆点か
ら始めて被覆の割合が順次大となるように被覆する。
被覆の割合の大きい部分での被覆の割合は２０〜１００
％である。又、本発明の好ましい態様として、線状光源
部の反対側の導光板端部近傍に於いては前記被覆の割合
が、それまでの割合と同等あるいは減少するか又は前記
被覆の割合が同等かその増加率がそれまでの増加率より
小となる部分を持つように被覆することである。Furthermore, the coating state of the light diffusing substance is such that the coating ratio is 1% to 50% near the linear light source on the light guide plate surface, and the coating state is 1% to 50% near the linear light source on the light guide plate surface, and the coating state is 1% to 50% on the light guide plate surface near the linear light source. Starting from a coating point, coating is performed in increasing proportions. The coverage ratio in areas with a large coverage ratio is 20 to 100.
%. Further, as a preferred embodiment of the present invention, in the vicinity of the end of the light guide plate on the opposite side of the linear light source part, the ratio of the coating is equal to or lower than the ratio before, or the ratio of the coating is the same as the previous ratio. The method is to cover the area so that the increase rate is smaller than the previous increase rate.
【００１４】上記した被覆の割合が同等となるかあるい
は減少するか又は前記被覆の割合が同等かその増加率が
それまでの増加率より小となる部分は、線状光源部の反
対側の導光板端部近傍であるが、線状光源部側から導光
板端部面までの長さの、導光板端部面側のほぼ２／１０
以下となるの地点から、導光板端部面部までの部分が目
安となる。尚、ここで言う被覆の割合（被覆率）とは、
導光板面の単位面積当たりに施した光散乱物質の被覆面
積の割合を言う。[0014] The portion where the above-mentioned coverage ratio becomes the same or decreases, or where the coverage ratio is the same or the increase rate is smaller than the previous increase rate is the guide on the opposite side of the linear light source section. Near the end of the light plate, approximately 2/10 of the length from the linear light source side to the end face of the light guide plate.
The area from the following point to the end surface of the light guide plate is a guideline. The coverage ratio (coverage rate) referred to here is
It refers to the ratio of the area covered by the light scattering material per unit area of the light guide plate surface.
【００１５】本発明の主要部は、このような構成からな
り、パネル、特に液晶パネルのバックライトとして使用
される。本発明では、更に以下に示すような構成とする
ことが好ましい。The main part of the present invention has such a structure and is used as a backlight for a panel, especially a liquid crystal panel. In the present invention, it is further preferable to have the following configuration.
【００１６】[0016]
【発明の効果】本発明は比較的小型で、輝度分布が均一
で充分な輝度を得られ、消費電力−輝度変換効率が大な
バックライトとして使用できる。Effects of the Invention The present invention is relatively compact, has a uniform luminance distribution, can obtain sufficient luminance, and can be used as a backlight with high power consumption-luminance conversion efficiency.
【００１７】[0017]
【実施例】実施例１
次に実施例で本発明を更に詳述する。図１に示すような
厚さ２ｍｍの長方形導光板（２２５ｍｍ×１２７ｍｍ）
の短手の端部に、その端部長より７ｍｍ長い直径４．８
ｍｍの太さの冷陰極管（ハリソン電機株式会社製径４．
８ｍｍφノ−マル管）を配置し、その管の外周を２ｍｍ
のスリットを持つ筒型アルミ光反射器で覆い、スリット
から出光した光が導光板の端部から導光板に入光するよ
うに配置した。筒型アルミ光反射器の内面はアクリル樹
脂を添着剤として用いたチタンホワイトを粉体塗装方法
で下表に示した各厚さに塗装したものを用いた。[Example] Example 1 Next, the present invention will be explained in more detail with reference to an example. 2mm thick rectangular light guide plate (225mm x 127mm) as shown in Figure 1
At the short end of the
cold cathode tube with a diameter of 4 mm (manufactured by Harrison Electric Co., Ltd.)
8mmφ normal tube) is placed, and the outer circumference of the tube is 2mm.
The light guide plate was covered with a cylindrical aluminum light reflector with slits, and the light guide plate was placed so that the light emitted from the slit entered the light guide plate from the end of the light guide plate. The inner surface of the cylindrical aluminum light reflector was coated with titanium white using acrylic resin as an adhesive using a powder coating method to the thickness shown in the table below.
【００１８】一方、導光板面上に被覆する光拡散物質は
、円形のドットパタ−ンをスクリ−ン印刷したものであ
り、スクリ−ン版下は、下記の条件で作成して用いた。
光拡散物質の被覆率は光源部近傍で６％、光源部の反対
側の部分の近傍で８０％、その中間ではこれらの比率が
光源部側から徐々に増加するように作図して用いた。又
光拡散反射板はアルミニウム板を用いた。On the other hand, the light-diffusing material coated on the light guide plate was screen-printed with a circular dot pattern, and the screen printing plate was prepared and used under the following conditions. The coverage ratio of the light diffusing substance was 6% near the light source, 80% near the opposite side of the light source, and in the middle, these ratios were designed and used so as to gradually increase from the light source side. Furthermore, an aluminum plate was used as the light diffusing and reflecting plate.
【００１９】冷陰極管に、インバ−タより３０ＫＨｚの
交番電圧をかけて一定電流で駆動させたときの面輝度を
、輝度計（トプコンＢＭ−８）により測定した。筒型ア
ルミ光反射器の内面の塗布厚さと輝度との関係を次表に
示した。The surface brightness of the cold cathode tube was measured using a brightness meter (Topcon BM-8) when the cold cathode tube was driven with a constant current by applying an alternating voltage of 30 KHz from an inverter. The relationship between the coating thickness on the inner surface of the cylindrical aluminum light reflector and the brightness is shown in the table below.
【００２０】
塗装厚さ（μｍ） ４０ ６０
７０ ８０輝度 （ｎｉｔ） ２６０
２７４ ２８０ ２８２実施例２
実施例１において、筒型アルミ光反射器の内面塗布をお
こなわず、光拡散反射板の表面を実施例１と同様に下表
に示した各厚さに塗装したものを用いた以外は実施例１
と同様に試験した。結果を次表に示した。Coating thickness (μm) 40 60
70 80 Brightness (nits) 260
274 280 282 Example 2 In Example 1, the inner surface of the cylindrical aluminum light reflector was not coated, but the surface of the light diffuser reflector was coated to each thickness shown in the table below in the same manner as in Example 1. Example 1 except that
It was tested in the same way. The results are shown in the table below.
【００２１】
塗装厚さ（μｍ） ４０ ６０
７０ ８０輝度 （ｎｉｔ） ２６２
２７６ ２８３ ２８５実施例３
実施例１において、光拡散反射板の表面を実施例１と同
様に下表に示した各厚さに塗装したものを用いた以外は
実施例１と同様に試験した。結果を次表に示した。
塗装厚さ（μｍ） ４０ ６０
７０ ８０ 輝度 （ｎｉｔ）
２８０ ２９２ ３００ ３０３比較例筒
型アルミ光反射器の内面及び、光拡散反射板の表面を下
表に示した各厚さに塗装したものを用いた以外は実施例
１と同様に試験した。結果を次表に示した。Coating thickness (μm) 40 60
70 80 Brightness (nits) 262
276 283 285 Example 3 In Example 1, the same test as in Example 1 was conducted except that the surface of the light diffusing and reflecting plate was coated with each thickness shown in the table below in the same manner as in Example 1. The results are shown in the table below.
Paint thickness (μm) 40 60
70 80 Brightness (nits)
280 292 300 303 Comparative Example Tests were carried out in the same manner as in Example 1, except that the inner surface of the cylindrical aluminum light reflector and the surface of the light diffuser reflector were coated to the thicknesses shown in the table below. The results are shown in the table below.
【００２２】
塗装厚さ（μｍ） １０ ２０輝度
（ｎｉｔ） ２１０ ２２０Coating thickness (μm) 10 20 Brightness
(nits) 210 220
【図１】本発明の一実施態様のバックライトの斜視図FIG. 1 is a perspective view of a backlight according to an embodiment of the present invention.
【
図２】本発明の一実施態様のバックライトの断面図[
FIG. 2: Cross-sectional view of a backlight according to an embodiment of the present invention
１：導光板 ２：光拡散板 ３：光拡散反射板 ４：線状光源 ５：反射器 ６：光散乱物質 1: Light guide plate 2: Light diffusion plate 3: Light diffuser and reflector 4: Linear light source 5:Reflector 6: Light scattering substance
Claims (2)
側面端部に、これに近接して線状光源を有し、前記導光
板の一方の広い面に該導光板材料よりも屈折率が大きい
光拡散物質を、導光板面上において線状光源側の一側面
端部からの距離が大となるに従って被覆の割合を増加さ
せるように被覆し、その面に相対して光拡散反射板を配
したパネル用バックライトに於いて、前記線状光源を覆
う反射板の光源に相対する面及び／又は前記光拡散反射
板の表面に、高い光拡散反射率を持つ材料を３０μｍ以
上の厚さで塗布したものを用いたパネル用バックライト
。1. A light guide plate made of a light-transmitting material, having a linear light source close to the edge of at least one side thereof, and having one wide surface of the light guide plate having a refractive index higher than that of the light guide plate material. A light diffusing material with a large surface area is coated on the light guide plate surface in such a way that the coating ratio increases as the distance from the end of one side of the linear light source side increases, and a light diffusing and reflecting material is applied to the light guide plate surface opposite to that surface. In the backlight for a panel, a material having a high light diffusion reflectance is coated with a thickness of 30 μm or more on the surface facing the light source of the reflection plate covering the linear light source and/or the surface of the light diffusion reflection plate. A backlight for a panel that uses a coating made of paint.
及び／又は光拡散反射板の表面に高い光拡散反射率を持
つ材料を３０〜１５０μｍの厚さで塗布したものを用い
た請求項１記載のパネル用バックライト。[Claim 2] A material having a high light diffusing reflectance is applied to the surface of the reflecting plate covering the linear light source facing the light source and/or the surface of the light diffusing reflecting plate to a thickness of 30 to 150 μm. The backlight for a panel according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3067698A JP2848713B2 (en) | 1991-03-08 | 1991-03-08 | Backlight for panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3067698A JP2848713B2 (en) | 1991-03-08 | 1991-03-08 | Backlight for panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04280224A true JPH04280224A (en) | 1992-10-06 |
| JP2848713B2 JP2848713B2 (en) | 1999-01-20 |
Family
ID=13352436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3067698A Expired - Fee Related JP2848713B2 (en) | 1991-03-08 | 1991-03-08 | Backlight for panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2848713B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8808444B2 (en) | 2011-12-01 | 2014-08-19 | Industrial Technology Research Institute | Functionalized soybean compound, and coating composition employing the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50134597A (en) * | 1974-04-10 | 1975-10-24 | ||
| JPH035725A (en) * | 1989-06-02 | 1991-01-11 | Mitsubishi Petrochem Co Ltd | Backlighting device |
-
1991
- 1991-03-08 JP JP3067698A patent/JP2848713B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50134597A (en) * | 1974-04-10 | 1975-10-24 | ||
| JPH035725A (en) * | 1989-06-02 | 1991-01-11 | Mitsubishi Petrochem Co Ltd | Backlighting device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8808444B2 (en) | 2011-12-01 | 2014-08-19 | Industrial Technology Research Institute | Functionalized soybean compound, and coating composition employing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2848713B2 (en) | 1999-01-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5647655A (en) | Back lighting device | |
| EP0442529A2 (en) | Back lighting device for a panel | |
| JPH04356015A (en) | Back light | |
| JP3500725B2 (en) | Backlight | |
| JP3627274B2 (en) | Backlight | |
| JPH05196940A (en) | Back light for panel | |
| JP2768082B2 (en) | Backlight for panel | |
| JP3306792B2 (en) | Backlight for LCD panel | |
| JP2848713B2 (en) | Backlight for panel | |
| JP2730310B2 (en) | Backlight for panel | |
| JP3528261B2 (en) | Backlight for panel | |
| JPH06222364A (en) | Back light | |
| JP2794909B2 (en) | Backlight for panel | |
| JPH06201919A (en) | Plane type lighting equipment | |
| JP3078063B2 (en) | Backlight for panel | |
| JP2937291B2 (en) | Light guide plate | |
| JP2776603B2 (en) | Backlight for panel | |
| JP3134422B2 (en) | Backlight | |
| JP3011059B2 (en) | Backlight | |
| JP2624059B2 (en) | Backlight for panel | |
| JPH04269702A (en) | Back light for panel | |
| JPH08101312A (en) | Back light | |
| JP3218750B2 (en) | Backlight for panel | |
| JP3284217B2 (en) | Liquid crystal display | |
| JP3203859B2 (en) | Backlight |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |