JPS63241522A - Filter for liquid crystal color display device - Google Patents
Filter for liquid crystal color display deviceInfo
- Publication number
- JPS63241522A JPS63241522A JP62075199A JP7519987A JPS63241522A JP S63241522 A JPS63241522 A JP S63241522A JP 62075199 A JP62075199 A JP 62075199A JP 7519987 A JP7519987 A JP 7519987A JP S63241522 A JPS63241522 A JP S63241522A
- Authority
- JP
- Japan
- Prior art keywords
- shielding layer
- light shielding
- filter
- substrate
- transparent electrode
- 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 description 6
- 239000000758 substrate Substances 0.000 claims abstract description 20
- 239000003086 colorant Substances 0.000 claims abstract description 5
- 229920001721 polyimide Polymers 0.000 abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 4
- 238000000059 patterning Methods 0.000 abstract description 4
- 239000009719 polyimide resin Substances 0.000 abstract description 4
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 2
- 239000000377 silicon dioxide Substances 0.000 abstract description 2
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 54
- 239000000463 material Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 235000000177 Indigofera tinctoria Nutrition 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229940097275 indigo Drugs 0.000 description 1
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 229920005575 poly(amic acid) Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Optical Filters (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、液晶カラー表示装置の一面に配置されるフ
ィルタ、特に、赤、緑、青の各画素群の画素の境界部分
を遮光する遮光層を有するものの改良技術に関する。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a filter disposed on one surface of a liquid crystal color display device, particularly a light shielding filter that shields light from the boundary portions of pixels in each group of red, green, and blue pixels. This invention relates to improved technology for materials having layers.
（従来の技術）
この種の遮光層を有するカラーフィルタは、遮光層がフ
ィルタ自体の解像度を上げ、表示画像の鮮鋭度を向上さ
せることから、そのニーズが高まっているものである（
たとえば１機能材料、１９８６年１１月号、３４ページ
の今後の展開の′欄参照）。(Prior Art) The need for color filters having this type of light-shielding layer is increasing because the light-shielding layer increases the resolution of the filter itself and improves the sharpness of the displayed image (
For example, see 1 Functional Materials, November 1986 issue, page 34, column 'Future Development').
そして、こうしたカラーフィルタの構造としては、ガラ
ス基板等の光透過性の基板の上に、ＩＴＯ（Ｉｎｄｉｕ
ｍ Ｔｉｎ ０ｘｉｄｅ）等の透明電極層、その透明１
ｔｔ極層の上に黒色の遮光層、さらに、３原色の画素群
の各パターンを順次積み重ねた構造が一般に知られてい
る。The structure of such a color filter is such that ITO (Indium Indigo) is placed on a light-transmissive substrate such as a glass substrate.
Transparent electrode layer such as (Tin Oxide), its transparent 1
A structure in which a black light-shielding layer and patterns of pixel groups of three primary colors are sequentially stacked on top of the tt pole layer is generally known.
（発明が解決しようとする問題点）
遮光層を有するカラーフィルタを製造する場合、次のよ
うな問題があることが判った。(Problems to be Solved by the Invention) It has been found that the following problems occur when manufacturing a color filter having a light shielding layer.
問題の一つは、透明電極層が遮光層のバターニング精度
を高める上で障害になることである。透明電極層は比較
的に薄いが、薄いとはいえ、たとえば、Ｘ方向あるいは
Ｙ方向に互いに平行に走った多数の線状のパターンが基
板の全面にわたって形成されることから、やはり基板の
全面にわたって形成される遮光層のパターン切れを悪く
する傾向がある。その影響は、画素数が多くなればなる
ほど顕著に出てくる。One of the problems is that the transparent electrode layer becomes an obstacle to improving the patterning accuracy of the light shielding layer. The transparent electrode layer is relatively thin, but even though it is thin, for example, many linear patterns running parallel to each other in the X direction or Y direction are formed over the entire surface of the substrate. This tends to make the pattern of the formed light-shielding layer worse. This effect becomes more pronounced as the number of pixels increases.
他の問題は、遮光層と透明電極層のパターンとのアライ
メントが困難となり、特に、オートアライナの使用がで
きなくなるおそれがあることである。遮光層は充分な遮
光性を有するものが好ましく、たとえば、ポリイミド樹
脂に黒色染料を直接入れた塗布液は、遮光層の形成材料
として好適である。しかし、こうした塗布液を用いて、
透明電極層の上に遮光層を形成するための塗布１漠を厚
くベタに塗布すると、下層の透明電極層のアライラン１
−マークが見えにくくなり、マニアルでの作業も国運と
なり、オートアライナの使用は不可能となる。Another problem is that alignment between the light-shielding layer and the pattern of the transparent electrode layer becomes difficult, and in particular, there is a possibility that an auto-aligner cannot be used. The light-shielding layer preferably has sufficient light-shielding properties, and for example, a coating liquid in which a black dye is directly added to a polyimide resin is suitable as a material for forming the light-shielding layer. However, using these coating solutions,
Coating 1 for forming a light-shielding layer on the transparent electrode layer If you apply a thick and solid layer, the alignment layer 1 of the lower transparent electrode layer will disappear.
- The mark becomes difficult to see, manual work becomes a problem, and it becomes impossible to use an auto aligner.
（問題点を解決するための手段）
この発明では１以上のような問題点を解決するため、前
記基板の上に遮光層−透明電極層−３原色の画素群の順
に各パターンを形成するようにしている。(Means for Solving the Problems) In order to solve one or more problems, in the present invention, each pattern is formed on the substrate in the order of a light-shielding layer, a transparent electrode layer, and pixel groups of three primary colors. I have to.
すなわち、従来とは異なり、遮光層を基板上に直接接す
るように形成し、その上に透明電極層を形成しているの
である。That is, unlike the conventional method, a light shielding layer is formed in direct contact with the substrate, and a transparent electrode layer is formed on top of the light shielding layer.
（作用）
遮光層は全く平坦な基板上に直接形成するので、高いパ
ターニング精度によって形成することができる。また一
方、透明電極層は透明であるがために、遮光層の上面全
体を被うように形成しても。(Function) Since the light shielding layer is directly formed on a completely flat substrate, it can be formed with high patterning accuracy. On the other hand, since the transparent electrode layer is transparent, it may be formed to cover the entire upper surface of the light shielding layer.
遮光層のアライメントマークを児にくくすることはない
。It does not make the alignment mark of the light-shielding layer difficult to form.
（実施例）
第１図はこの発明による液晶カラー表示装置用フィルタ
の一実施例を示す側断面図である。(Embodiment) FIG. 1 is a side sectional view showing an embodiment of a filter for a liquid crystal color display device according to the present invention.
光透明性のガラス板から成る基板１０は、互いに平行で
、かつ各々が平坦な二面１０ａ、１０ｂを有する。この
基板１０の一面１０ａに、たとえば厚さ１．５μｍ程度
で充分な遮光性をもつ遮光層１２が形成されている。遮
光層１２は、全体的に格子状に形成され、基板１０の一
面１０ａを多数の４角形の領域１４に区画している。こ
の遮光層１２は、フィルタの解像度を規制するものであ
るため、フォトリングラフィによって高精度にパターニ
ングされる。平坦な基板１０の一面１０ａに塗布層を形
成するので、全体にわたって均一な層を容易に形成する
ことができ、しかも、パターンの切れも良好である。特
に、基板１０に対するぬれ性に難点がある。ポリイミド
系の材料の場合、その効果が顕著である。なお、遮光層
１２の幅は、たとえば１０〜８０μｍ程度と、上に形成
するパターンのアライメント誤差を充分に吸収しつるだ
けの大きさに設定されている。A substrate 10 made of an optically transparent glass plate has two surfaces 10a and 10b that are parallel to each other and each flat. On one surface 10a of this substrate 10, a light shielding layer 12 having a thickness of, for example, about 1.5 μm and having sufficient light shielding properties is formed. The light shielding layer 12 is entirely formed in a lattice shape, and divides one surface 10a of the substrate 10 into a large number of rectangular regions 14. Since this light shielding layer 12 regulates the resolution of the filter, it is patterned with high precision by photolithography. Since the coating layer is formed on one surface 10a of the flat substrate 10, a uniform layer can be easily formed over the entire surface, and the pattern is well cut. In particular, there is a problem in wettability to the substrate 10. In the case of polyimide-based materials, this effect is remarkable. Note that the width of the light-shielding layer 12 is set to, for example, about 10 to 80 μm, which is large enough to sufficiently absorb alignment errors of the pattern formed thereon.
こうした遮光層１２を含む基板１０の一面に、ＩＴＯか
ら成る透明電極層１６が形成されている。A transparent electrode layer 16 made of ITO is formed on one surface of the substrate 10 including the light shielding layer 12.
透明電極層１６は表示画像を選択するラインであり、し
かも、その厚さがたとえば０．２μｍ程度と薄いので、
遮光層１２に比べればパターンの切れはそれほど問題に
はならない、しかし、遮光層１２の段差部分における断
線防止に注意すべきである。この透明電極層１６は、蒸
着あるいはスパッタリングによって形成したＩＴＯの層
をパターニングすることによって形成する。ＩＴＯは透
明であるので、下層の遮光層１２のアライラン１−マー
クが見やすく、アライメント操作が容易である。The transparent electrode layer 16 is a line for selecting a display image, and its thickness is as thin as, for example, about 0.2 μm.
Compared to the light-shielding layer 12, pattern breakage is not so much of a problem, but care should be taken to prevent wire breakage at the stepped portions of the light-shielding layer 12. This transparent electrode layer 16 is formed by patterning an ITO layer formed by vapor deposition or sputtering. Since ITO is transparent, the alignment mark 1-mark on the lower light-shielding layer 12 is easy to see and the alignment operation is easy.
また、オートアライナの使用も可能である。It is also possible to use an autoaligner.
赤、緑、青の３群のフィルタ画素１８Ｒ，１８Ｇ、１８
Ｂは、遮光層１２および透明電極層１６の上に形成され
ている。各フィルタ画素は、いずれもポリイミド樹脂の
中に染料を混入した材料を用いてパターニングされてお
り、各々、遮光層１２が区画する領域１４よりも少し太
き目の４角形状であって、その周縁部は遮光層１２の上
に位置している。そして、こうした各フィルタ画素１、
８ Ｒ、１８Ｇ 、 １８ Ｂの上を、ポリイミド樹脂
あるいは二酸化ケイ素系などの透明保護膜２０が被って
いる。Three groups of filter pixels 18R, 18G, 18 of red, green, and blue
B is formed on the light shielding layer 12 and the transparent electrode layer 16. Each filter pixel is patterned using a material made of polyimide resin mixed with dye, and each has a rectangular shape that is slightly thicker than the area 14 defined by the light shielding layer 12. The peripheral portion is located on the light shielding layer 12. Each of these filter pixels 1,
8R, 18G, and 18B are covered with a transparent protective film 20 made of polyimide resin, silicon dioxide, or the like.
なお、遮光層１２の上に、段差を低減するために中間の
保ｆＩｐＰＪを設けるようにしても良く、あるいは、遮
光層１２をより遮光性の高いクロム等の金属パターン、
さらにはカーボンブラックを分散したポリアミック酸溶
液で形成したパターンで形成するようにすることもでき
る。導電性のパターンで遮光層１２を形成する場合、中
間の保護層として絶縁層が必要となる。Note that an intermediate fIpPJ may be provided on the light-shielding layer 12 in order to reduce the level difference, or the light-shielding layer 12 may be formed with a pattern of metal such as chromium, which has a higher light-shielding property.
Furthermore, it is also possible to form a pattern using a polyamic acid solution in which carbon black is dispersed. When forming the light shielding layer 12 with a conductive pattern, an insulating layer is required as an intermediate protective layer.
（発明の効果）
この発明によれば、基板１０の上に、遮光層１２−透明
電極層１６−各フィルタ画素１８Ｒ９１８Ｇ、１８１３
の順に各パターンが形成されているので、高い解像度を
もち、しかも、アライメント操作等が容易で製造上有利
なフィルタを提供することができる。(Effects of the Invention) According to the present invention, on the substrate 10, the light shielding layer 12 - the transparent electrode layer 16 - each filter pixel 18R918G, 1813
Since each pattern is formed in this order, it is possible to provide a filter that has high resolution, is easy to perform alignment operations, etc., and is advantageous in manufacturing.
第１図はこの発明の一実施例を示す側断面図である。
１０・・・基板、１２・・・遮光層、１６・・・透明電
極層、１８Ｒ，１８Ｇ、１８Ｂ・・・フィルタ画素。FIG. 1 is a side sectional view showing one embodiment of the present invention. DESCRIPTION OF SYMBOLS 10... Substrate, 12... Light shielding layer, 16... Transparent electrode layer, 18R, 18G, 18B... Filter pixel.
Claims (1)
ルタであって、（イ）光透過性の基板と、（ロ）この基
板上に形成された、赤、緑、青の３原色の画素群、各画
素群の画素間の境界部分を遮光する遮光層、および表示
すべき画素を選択するための透明電極層とを有する液晶
カラー表示装置用フィルタにおいて、前記基板の上に遮
光層−透明電極層−３原色の画素群の順に各パターンが
形成されていることを特徴とする、液晶カラー表示装置
用フィルタ。1. A color filter arranged on one side of a liquid crystal color display device, which includes (a) a light-transmitting substrate and (b) a group of pixels of three primary colors of red, green, and blue formed on this substrate. , a filter for a liquid crystal color display device having a light-shielding layer that shields light from the boundary between pixels of each pixel group, and a transparent electrode layer for selecting pixels to be displayed; Layer - A filter for a liquid crystal color display device, characterized in that each pattern is formed in the order of pixel groups of three primary colors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62075199A JPS63241522A (en) | 1987-03-28 | 1987-03-28 | Filter for liquid crystal color display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62075199A JPS63241522A (en) | 1987-03-28 | 1987-03-28 | Filter for liquid crystal color display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63241522A true JPS63241522A (en) | 1988-10-06 |
Family
ID=13569288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62075199A Pending JPS63241522A (en) | 1987-03-28 | 1987-03-28 | Filter for liquid crystal color display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63241522A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63282703A (en) * | 1987-05-14 | 1988-11-18 | Toppan Printing Co Ltd | Color filter |
| JPS63282702A (en) * | 1987-05-14 | 1988-11-18 | Toppan Printing Co Ltd | Color filter |
| WO1992004654A1 (en) * | 1990-08-31 | 1992-03-19 | Idemitsu Kosan Co., Ltd. | Color filter, method of producing the same, color liquid crystal panel and method of driving the same |
| JPH04172424A (en) * | 1990-11-06 | 1992-06-19 | Sharp Corp | Manufacture of color liquid crystal display |
| US5128786A (en) * | 1989-07-14 | 1992-07-07 | Casio Computer Co., Ltd. | Liquid crystal display device having light shielding member with discontinous pattern |
| US5194976A (en) * | 1989-07-25 | 1993-03-16 | Casio Computer Co., Ltd. | Liquid crystal display device and method of manufacturing the same |
| US5212575A (en) * | 1988-08-30 | 1993-05-18 | Canon Kabushiki Kaisha | Functional substrate for controlling pixels |
| US5296954A (en) * | 1990-09-11 | 1994-03-22 | Sharp Kabushiki Kaisha | Liquid crystal display device having masking films being connected by conductors which extend across the central portions of the display electrodes |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6214422B2 (en) * | 1979-08-06 | 1987-04-02 | Nippon Ee Bii Esu Kk |
-
1987
- 1987-03-28 JP JP62075199A patent/JPS63241522A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6214422B2 (en) * | 1979-08-06 | 1987-04-02 | Nippon Ee Bii Esu Kk |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63282703A (en) * | 1987-05-14 | 1988-11-18 | Toppan Printing Co Ltd | Color filter |
| JPS63282702A (en) * | 1987-05-14 | 1988-11-18 | Toppan Printing Co Ltd | Color filter |
| US5212575A (en) * | 1988-08-30 | 1993-05-18 | Canon Kabushiki Kaisha | Functional substrate for controlling pixels |
| US5650867A (en) * | 1988-08-30 | 1997-07-22 | Canon Kabushiki Kaisha | Functional substrate for controlling pixels |
| US5128786A (en) * | 1989-07-14 | 1992-07-07 | Casio Computer Co., Ltd. | Liquid crystal display device having light shielding member with discontinous pattern |
| US5194976A (en) * | 1989-07-25 | 1993-03-16 | Casio Computer Co., Ltd. | Liquid crystal display device and method of manufacturing the same |
| WO1992004654A1 (en) * | 1990-08-31 | 1992-03-19 | Idemitsu Kosan Co., Ltd. | Color filter, method of producing the same, color liquid crystal panel and method of driving the same |
| US5296954A (en) * | 1990-09-11 | 1994-03-22 | Sharp Kabushiki Kaisha | Liquid crystal display device having masking films being connected by conductors which extend across the central portions of the display electrodes |
| JPH04172424A (en) * | 1990-11-06 | 1992-06-19 | Sharp Corp | Manufacture of color liquid crystal display |
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