JPH01239523A - Multicolor liquid crystal display device - Google Patents
Multicolor liquid crystal display deviceInfo
- Publication number
- JPH01239523A JPH01239523A JP63067823A JP6782388A JPH01239523A JP H01239523 A JPH01239523 A JP H01239523A JP 63067823 A JP63067823 A JP 63067823A JP 6782388 A JP6782388 A JP 6782388A JP H01239523 A JPH01239523 A JP H01239523A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- light shielding
- light
- color filters
- composite material
- 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
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 26
- 239000002131 composite material Substances 0.000 claims abstract description 16
- 239000006229 carbon black Substances 0.000 claims abstract description 13
- 239000000758 substrate Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 239000010408 film Substances 0.000 description 34
- 238000000034 method Methods 0.000 description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 238000004070 electrodeposition Methods 0.000 description 5
- 239000010409 thin film Substances 0.000 description 5
- 238000004043 dyeing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000007639 printing Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000003086 colorant Substances 0.000 description 3
- 210000002858 crystal cell Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000004313 glare Effects 0.000 description 2
- 229920002120 photoresistant polymer Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 206010034972 Photosensitivity reaction Diseases 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000036211 photosensitivity Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、液晶カラーテレビ、パーソナルコンピュータ
の表示装置、ビデオ表示装置、計測機器の表示パネル等
あらゆる用途に応用可能な高画質多色液晶表示装置に関
するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a high-definition multicolor liquid crystal display that can be applied to various uses such as liquid crystal color televisions, display devices for personal computers, video display devices, and display panels for measuring instruments. It is related to the device.
本発明は、多色液晶表示装置に使用されるカラーフィル
ターに設けられたカラーフィルター間隙部の遮光性膜を
カーボンブランクを含有させた複合感光材料とすること
により、十分な遮光性機能を存することにより高画質の
多色液晶表示装置を提供する。The present invention provides a sufficient light-shielding function by using a composite photosensitive material containing carbon blank as a light-shielding film in the color filter gap provided in a color filter used in a multicolor liquid crystal display device. This provides a high-quality multicolor liquid crystal display device.
液晶表示装置は従来、時計や電卓等の表示装置として広
く用いられてきたが、近年では表示パネルに極めて微細
なカラーフィルターを用いることにより多色表示が行え
るようになってきた。この場合、液晶は光シヤツターと
して用いられるが、シャッターを閉じた際の光の遮光率
、特にカラーフィルター間隙からの光の漏れが表示品質
、カラーコントラストを低下させる要因となる。この欠
点を除去するために、カラーフィルター間隙に遮光膜を
設けることが必要になってきている。Liquid crystal display devices have conventionally been widely used as display devices for watches, calculators, etc., but in recent years, it has become possible to display multiple colors by using extremely fine color filters in display panels. In this case, the liquid crystal is used as a light shutter, but the light blocking rate when the shutter is closed, especially the leakage of light from the gaps between the color filters, becomes a factor that deteriorates display quality and color contrast. In order to eliminate this drawback, it has become necessary to provide a light shielding film between the color filters.
従来、この遮光膜の形成はいくつかの方法で工業的にも
実施されている。Conventionally, the formation of this light-shielding film has been carried out industrially using several methods.
一つは、第４図に示すように、カラーフィルタ−単独の
遮光率では不十分なために、赤、緑、青の３色のカラー
フィルターをオ〜ハーラフプさせて表示に寄与しない部
分を減法混色法で黒色化し遮光性を向上させようとした
ものである。この方法は、カラーフィルターの３つの製
法染色法、印刷法、電着法のうち前者の２つの方法で可
能である。電着法は、パターニングされた透明電極上に
カラーフィルターを形成させるので、赤、緑、青のカラ
ーフィルターを重ね合わせることができない。One is, as shown in Figure 4, because the light shielding rate of the color filter alone is insufficient, so three color filters of red, green, and blue are used in half-fold to subtract the part that does not contribute to the display. This was an attempt to improve the light-shielding property by creating a black color using a color mixing method. This method is possible with the former two of the three manufacturing methods for color filters: dyeing, printing, and electrodeposition. Since the electrodeposition method forms color filters on patterned transparent electrodes, it is not possible to overlap red, green, and blue color filters.
次に、上記の３色のカラーフィルターの重ね合わせによ
る遮光膜の遮光性を更に向上させるために第５図に示す
ように、３色のカラーフィルターの重ね合わせの最下層
部に黒色のフィルター層をつけ加えたものがある。Next, in order to further improve the light-shielding properties of the light-shielding film formed by superimposing the three-color color filters, a black filter layer is added to the bottom layer of the superposition of the three-color color filters, as shown in Figure 5. There is something that has been added.
もう一つは、第６図に示すように、カラーフィルター間
隙部に金属薄膜を設けて遮光膜を形成ししたものである
。The other type, as shown in FIG. 6, is one in which a metal thin film is provided in the gap between the color filters to form a light-shielding film.
前記の第一の従来技術では、赤、緑、青の３色のカラー
フィルターを重ね合わせるため、重ね合わせた遮光膜部
分が、赤、緑、青のカラーフィルターの３色分の膜厚と
なり、第４図のように掻めて凹凸の激しいカラーフィル
ター表面になってしまう。そのため、表示パネル駆動の
際に必要なカラーフィルター上の透明電捲層とその上の
液晶配向膜層にもその凹凸が引き継がれてしまい、透明
電極のクラック発生や配向不良の原因となる欠点を有し
ている。また、この技術では、染色法と印刷法によるカ
ラーフィルターには適用できるが、相隣接する透明電極
間に間隙を有し、前記透明電極上にカラーフィルターを
形成する電着法では、赤、緑、青の３色カーフイルター
の重ね合わせはできないので遮光膜そのもか得られず、
電着カラーフィルターには適用できないという欠点があ
った。In the first conventional technology, the three color filters of red, green, and blue are superimposed, so the overlapped light-shielding film portion has a film thickness corresponding to the three colors of the red, green, and blue color filters. As shown in Fig. 4, the surface of the color filter becomes extremely uneven due to scratching. Therefore, the unevenness is carried over to the transparent capacitor layer on the color filter and the liquid crystal alignment film layer above it, which are necessary when driving the display panel, and this causes defects that cause cracks and alignment defects in the transparent electrode. have. In addition, although this technology can be applied to color filters by dyeing and printing methods, the electrodeposition method, in which there is a gap between adjacent transparent electrodes and a color filter is formed on the transparent electrodes, is not suitable for red, green, or green color filters. Since the three-color blue car filter cannot be overlapped, only the light-shielding film itself can be obtained.
The drawback was that it could not be applied to electrodeposited color filters.
第二の技術は、Ｔ Ｐ Ｔ （Ｔｈｉｎ Ｆｉｌｍ Ｔ
ｒａｎｓｉｔｅｒ）素子等のアクティブ素子を対向基板
にした表示装置の光り−クによる表示不良対策としては
一層効果を発揮するが、第一の技術と同様な欠点を有す
るのに加えて、黒色のフィルター形成工程が加わり、製
造コストを高める欠点があった。The second technique is T P T (Thin Film T
Although this technique is more effective as a countermeasure against display defects caused by glare in display devices that use active elements such as RANSITER elements as opposing substrates, it has the same drawbacks as the first technique, and in addition, it is difficult to form a black filter. This has the disadvantage of adding additional steps and increasing manufacturing costs.
前記第三の技術は、金属薄膜の膜厚０．１〜０．３ミク
ロンに対しカラーフィルタの膜厚が約１．０ ミクロン
になるので、前記第一の技術と同様に表面の凹凸は避け
られず、液晶配向不良による表示品質が低下する欠点を
有していた。また、遮光膜となる金属薄膜が電気的導通
を有するため、この技術によるカラーフィルターは、カ
ラーフィルター上の透明電極をバターニングして駆動さ
せる単純マトリックス方式の液晶表示装置では透明電極
間を金属薄膜がショートさせてしまうため適用できない
という欠点を存していた。In the third technique, the thickness of the color filter is approximately 1.0 microns compared to the thickness of the metal thin film of 0.1 to 0.3 microns, so surface irregularities are avoided as in the first technique. However, it had the disadvantage that display quality deteriorated due to poor liquid crystal alignment. In addition, because the metal thin film that serves as the light-shielding film has electrical conductivity, color filters using this technology do not require a simple matrix type liquid crystal display device in which the transparent electrodes on the color filter are patterned and driven. However, it has the disadvantage that it cannot be applied because it causes a short circuit.
（課題を解決するための手段とその作用〕上記の欠点を
除去するために本発明では、カラーフィルター間隙部に
、カラーフィルター材料とは別個な材料を独自に使用す
ることにより、まずカラーフィルター上の表面の凹凸を
なくし、極めて均一な表面を形成できるようにした。通
常、カラーフィルターの膜厚は０．５〜ミクロン〜１．
５ミクロンで使用されるが、本発明の遮光性を有する感
光性複合材料をあらかじめカラーフィルターの膜厚と同
程度に形成すれば良い。(Means for Solving the Problems and Their Effects) In order to eliminate the above-mentioned drawbacks, the present invention first uses a material different from the color filter material in the color filter gap. This eliminates the unevenness of the surface, making it possible to form an extremely uniform surface.Normally, the film thickness of a color filter is 0.5 to 1.5 microns.
Although it is used at a thickness of 5 microns, the photosensitive composite material having light-shielding properties of the present invention may be formed in advance to a thickness comparable to that of the color filter.
次に、光の漏れを防止するために前記感光性材料中に黒
色を有するカーボンブラックを添加することにより目的
を果たすことができる。光の遮光性の程度すなわち遮光
率は、感光性材料中へのカーボンブランク添加量とその
カーボンブランクが添加された感光性複合材料の膜厚と
によって自由に調整することができる。Next, the purpose can be achieved by adding carbon black, which has a black color, into the photosensitive material to prevent light leakage. The degree of light blocking ability, that is, the light blocking rate, can be freely adjusted by adjusting the amount of carbon blank added to the photosensitive material and the film thickness of the photosensitive composite material to which the carbon blank is added.
本発明で更に重要な着眼点は、前記感光性複合材料中の
カーボンブランク含有率である。カーボンブラックを必
要以上に添加すると、感光性樹脂内でカーボンブラック
を鎖状連結し、熱硬化した後導電性を有してしまう問題
が発生する。この感光性複合材料による遮光膜の絶縁性
が保持されるカーボンブラックの添加割合は、種々検討
した結果前記感光性複合材料の１５．０重世％以下であ
ることが確認された。すなわち、カーボンブランク添加
量を１５．０重量以下にすることで液晶多色表示装置に
用いられるカラーフィルター中の遮光膜として使用可能
であることがわがった・
ちなみに、本発明に使用する感光性材料はいわゆるネガ
レジスト、ポジレジストのどちらでも良い。また、前記
感光性材料を黒色化するための添加材はカーボンブラッ
ク以外にも種々あるが、それらはいずれも遮光性が不十
分であったり、感光性材料中への均一分散とその安定性
が不十分であり使用が難しい現状である。A more important point in the present invention is the carbon blank content in the photosensitive composite material. If more carbon black is added than necessary, a problem arises in that the carbon black is chain-linked within the photosensitive resin and becomes conductive after being thermally cured. As a result of various studies, it was confirmed that the addition ratio of carbon black that maintains the insulation properties of the light-shielding film made of this photosensitive composite material is 15.0 weight percent or less of the photosensitive composite material. In other words, it has been found that by reducing the amount of carbon blank added to 15.0 weight or less, it can be used as a light shielding film in color filters used in liquid crystal multicolor display devices.Incidentally, the photosensitivity used in the present invention The material may be either a so-called negative resist or a positive resist. In addition, there are various additives other than carbon black that can be used to blacken the photosensitive material, but they all have insufficient light-shielding properties or lack uniform dispersion and stability in the photosensitive material. The current situation is that it is insufficient and difficult to use.
以下、実施例に基づいて本発明を具体的に説明する。 Hereinafter, the present invention will be specifically explained based on Examples.
（実施例１）
第１図は本発明による多色液晶表示装置の実施例を示す
模式断面図である。(Example 1) FIG. 1 is a schematic cross-sectional view showing an example of a multicolor liquid crystal display device according to the present invention.
１はガラス基板、２はその上に蒸着法により形成した透
明電極をパターニングしたものである。Reference numeral 1 is a glass substrate, and reference numeral 2 is a glass substrate on which transparent electrodes formed by vapor deposition are patterned.
３は電着法により形成したカラーフィルターで赤。3 is a red color filter formed by electrodeposition.
緑、青の３色をそれぞれ１．０ ミクロンの膜厚にした
。４は本発明のネガレジストの固型分に対しカーボンブ
ラ、りを１０重量％含有させた感光性複合材料により形
成した遮光膜である。この遮光膜は、スピンナーにより
塗布した後、露光・現像・焼成して１．Ｏミクロンの膜
厚にした。これによりカラーフィルター表面と遮光膜表
面とは平滑表面になった。遮光膜の抵抗値は、５Ｘ１０
”Ω・１と大きく透明電極２の相互の絶縁性は十分確保
された。Each of the three colors green and blue was made to have a film thickness of 1.0 micron. 4 is a light-shielding film formed of a photosensitive composite material containing 10% by weight of carbon black based on the solid content of the negative resist of the present invention. This light-shielding film is coated with a spinner, then exposed, developed, and baked. The film thickness was set to 0 microns. As a result, the color filter surface and the light shielding film surface became smooth surfaces. The resistance value of the light shielding film is 5X10
``The mutual insulation between the transparent electrodes 2 was sufficiently ensured due to the large resistance of Ω·1.
このようにして作られたカラーフィルターと対向基板と
を組み合わせて液晶セルを製作した。このセルの遮光膜
部の遮光率は９７．５％と極めて高く、良好なカラーコ
ントラストが得られ液晶の配向不良も発生しなかった。A liquid crystal cell was manufactured by combining the color filter made in this way and a counter substrate. The light shielding rate of the light shielding film portion of this cell was extremely high at 97.5%, good color contrast was obtained, and no liquid crystal alignment defects occurred.
（実施例２）
第２図は染色法によりカラーフィルター３を形成した本
発明の第２実施例を示す模式断面図であり、透明電極２
はカラーフィルター上に形成したものである。遮光膜４
は、ポジレジスト固型分中にカーボンブラックを１３．
０重量％含有させた感光性複合材料から形成した。カラ
ーフィルター３の膜厚を０．５ミクロン、透明電極２の
厚さを０．１ミクロン、遮光膜の厚さを０．６ ミクロ
ンにしてカラーフィルター表面の平滑さを得た。このよ
うにして作られたカラーフィルターを用いた液晶表示装
置の遮光膜部分の遮光率は９８．５％であった。又、遮
光膜の抵抗値は３．ＯＸ １０”Ω・Ｃ−であり、遮光
率と絶縁性は全く問題なく、表示品質の高い多色液晶表
示装置を得た。(Example 2) FIG. 2 is a schematic cross-sectional view showing a second example of the present invention in which a color filter 3 is formed by a dyeing method.
is formed on a color filter. Light shielding film 4
13. Carbon black is added to the positive resist solid content.
It was formed from a photosensitive composite material containing 0% by weight. The color filter 3 had a thickness of 0.5 micron, the transparent electrode 2 had a thickness of 0.1 micron, and the light shielding film had a thickness of 0.6 micron to obtain a smooth color filter surface. The light shielding rate of the light shielding film portion of the liquid crystal display device using the color filter thus produced was 98.5%. Also, the resistance value of the light shielding film is 3. OX 10"Ω·C-, and there were no problems in light shielding rate and insulation, and a multicolor liquid crystal display device with high display quality was obtained.
（実施例３）
第３図は、印刷法によりカラーフィルターを形成し、対
向基板にＴＰＴ素子基板を配置した本発明の第３実施例
を示す模式断面図である。カラーフィルター３の膜厚を
１．５ ミクロンとし、カーボンブランク含有率を１５
．０重量％にした感光性複合材料により形成した遮光膜
４の厚さを１．５ ミクロンに揃え、その上に透明電極
２を形成させた。このようにして得られたカラーフィル
ターを用いた液晶セルの遮光膜部の遮光率は９９，５％
と高（、ＴＰＴの光リーク不良は全く発生しなかった。(Example 3) FIG. 3 is a schematic cross-sectional view showing a third example of the present invention in which a color filter is formed by a printing method and a TPT element substrate is placed on a counter substrate. The film thickness of the color filter 3 was 1.5 microns, and the carbon blank content was 15
．． The thickness of the light-shielding film 4 made of a photosensitive composite material with a concentration of 0% by weight was adjusted to 1.5 microns, and the transparent electrode 2 was formed thereon. The light shielding rate of the light shielding film part of the liquid crystal cell using the color filter obtained in this way is 99.5%.
and high (, TPT light leakage failure did not occur at all.
以上のように、本発明によるカーボンブラ・ツクを含有
させた感光性複合材料を用いて形成された遮光膜を設け
られたカラーフィルターは、カラーフィルター表面が平
滑で液晶の配向性が良好であり、このカラーフィルター
を用いて製作された多色液晶表示装置の光の漏れはなく
良好なカラーコントラストが得られた。また、ＴＰＴア
クティブ素子を対向基板とした液晶セルの場合にも光り
−ク不良もなくなる等大きな効果が得られた。As described above, the color filter provided with the light-shielding film formed using the photosensitive composite material containing carbon black according to the present invention has a smooth color filter surface and good liquid crystal orientation. A multicolor liquid crystal display device manufactured using this color filter had no light leakage and good color contrast was obtained. Also, in the case of a liquid crystal cell using a TPT active element as a counter substrate, great effects such as no glare defects were obtained.
さらに、本発明の感光性複合材料による遮光膜は、カラ
ーフィルターの製法いかんにかかわらず適用可能であり
、工業的な価値も大きい。Furthermore, the light-shielding film made of the photosensitive composite material of the present invention can be applied regardless of the manufacturing method of color filters, and has great industrial value.
第１図、第２図、第３図はそれぞれ、電着法、染色法、
印刷法によるカラーフィルターを用いた本発明の多色液
晶表示装置の断面模式図、第４図。
第５図、第６図はそれぞれカラーフィルターの重ね合わ
せによる遮光膜、から−フィルターの重ね合わせに黒色
フィルターを重ねた遮光膜、金属薄膜を遮光膜とした従
来の多色液晶表示装置である。
ｌ・ ・ ・ガラス基（反
２・・・透明電極
３・・・カラーフィルター
４・・・遮光膜
５・・・透明電極
６・・・対向基板
７・・・ＴＰＴ素子
８・・・ン夜晶
以上
出願人 セイコー電子工業株式会社
第１図
シ（、芭沫１；ｊ用し丁て第２火方乏ダＪの往１面図第
２図
鯉Ｓ杉五１；譚乱用しく第３努狙例のｔ面図第３図Figures 1, 2, and 3 show the electrodeposition method, dyeing method,
FIG. 4 is a schematic cross-sectional view of a multicolor liquid crystal display device of the present invention using a color filter produced by a printing method. FIGS. 5 and 6 show a conventional multicolor liquid crystal display device in which a light shielding film is formed by superimposing color filters, a light shielding film is formed by superimposing black filters on top of a black filter, and a light shielding film is a metal thin film, respectively. l・・・Glass base (anti-2...transparent electrode 3...color filter 4...light shielding film 5...transparent electrode 6...counter substrate 7...TPT element 8...n night Seiko Electronics Co., Ltd. Applicant: Seiko Electronics Co., Ltd. Figure 1 Figure 3: T-side view of an example of aiming
Claims (1)
ィルターが設けられ、該カラーフィルター間隙部位置に
遮光膜を有する基板であり、該基板間に液晶を挟持して
なる多色液晶表示装置において、該遮光膜が感光性材料
とカーボンブラックを含有した感光性複合材料であるこ
とを特徴とする多色液晶表示装置。A multicolor liquid crystal display device in which at least one of two transparent electrode substrates is provided with a color filter and a light shielding film is provided at a gap between the color filters, and a liquid crystal is sandwiched between the substrates. A multicolor liquid crystal display device, wherein the light shielding film is a photosensitive composite material containing a photosensitive material and carbon black.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63067823A JPH01239523A (en) | 1988-03-22 | 1988-03-22 | Multicolor liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63067823A JPH01239523A (en) | 1988-03-22 | 1988-03-22 | Multicolor liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01239523A true JPH01239523A (en) | 1989-09-25 |
Family
ID=13356049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63067823A Pending JPH01239523A (en) | 1988-03-22 | 1988-03-22 | Multicolor liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01239523A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6128057A (en) * | 1996-03-08 | 2000-10-03 | Canon Kabushiki Kaisha | LCD with masking member having multiple portions having different characteristics |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6360422A (en) * | 1986-08-30 | 1988-03-16 | Canon Inc | Ferroelectric liquid crystal element |
-
1988
- 1988-03-22 JP JP63067823A patent/JPH01239523A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6360422A (en) * | 1986-08-30 | 1988-03-16 | Canon Inc | Ferroelectric liquid crystal element |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6128057A (en) * | 1996-03-08 | 2000-10-03 | Canon Kabushiki Kaisha | LCD with masking member having multiple portions having different characteristics |
| US6366332B1 (en) | 1996-03-08 | 2002-04-02 | Canon Kabushiki Kaisha | Display apparatus and process for production thereof |
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