JPH0440420A - Light shielding filter for liquid crystal display device - Google Patents
Light shielding filter for liquid crystal display deviceInfo
- Publication number
- JPH0440420A JPH0440420A JP2148096A JP14809690A JPH0440420A JP H0440420 A JPH0440420 A JP H0440420A JP 2148096 A JP2148096 A JP 2148096A JP 14809690 A JP14809690 A JP 14809690A JP H0440420 A JPH0440420 A JP H0440420A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- light
- light shielding
- substrate
- crystal display
- 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 22
- 239000000758 substrate Substances 0.000 claims abstract description 23
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 7
- 239000010419 fine particle Substances 0.000 claims abstract description 6
- 239000012860 organic pigment Substances 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 7
- 239000011521 glass Substances 0.000 abstract description 4
- 239000004925 Acrylic resin Substances 0.000 abstract description 2
- 229920000178 Acrylic resin Polymers 0.000 abstract description 2
- 239000000049 pigment Substances 0.000 abstract 2
- 239000002184 metal Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
Abstract
Description
【発明の詳細な説明】 〈産業上の利用分野〉 本発明は、液晶表示装置用遮光フィルターに関する。[Detailed description of the invention] <Industrial application field> The present invention relates to a light shielding filter for liquid crystal display devices.
〈従来の技術〉
液晶の複屈折を利用したＴＮ（ツイストネマティック）
や５ＴＮ（スーパーツイストネマティック）などの表示
方式に置ける電気光学特性は、第２図に示すように、電
圧無印加時の透過率１５よりも非選択信号を印加したと
きの透過率１６の方が小さい。従って、画素を構成して
非選択信号を印加したとき、電圧が印加されない画素の
間からのわずかな光漏れによって、表示装置の表示コン
トラストが悪くなる。<Conventional technology> TN (twisted nematic) using birefringence of liquid crystal
As shown in Figure 2, the electro-optical characteristics of display systems such as 5TN (Super Twisted Nematic) and 5TN (Super Twisted Nematic) have a transmittance of 16 when a non-selection signal is applied than a transmittance of 15 when no voltage is applied. small. Therefore, when pixels are configured and a non-selection signal is applied, the display contrast of the display device deteriorates due to slight light leakage between pixels to which no voltage is applied.
上記の光漏れをなくするために、従来は、第３図に示す
ように、画素間に対応する透明基板１１上に金属遮光膜
１３を形成していた。金属膜は導電性があるので、その
上に絶縁膜１４を形成した後、画素を構成するための透
明電極１２を形成していたが、金属遮光膜１３と透明電
極１２がショートしたり、容量結合したりして、表示欠
陥になったり表示品質を悪くしたりしていた。透明電極
上に遮光フィルターを形成する方法もあるが、炭素微粒
子を樹脂中に分散させた遮光材料は充分な遮光性をもた
せると絶縁性が悪くなり、表示性能を悪くする。In order to eliminate the above-mentioned light leakage, conventionally, as shown in FIG. 3, a metal light-shielding film 13 was formed on the transparent substrate 11 corresponding to between the pixels. Since the metal film is conductive, the transparent electrode 12 for forming the pixel was formed after forming the insulating film 14 on it. This causes display defects and deteriorates display quality. There is also a method of forming a light-shielding filter on a transparent electrode, but if a light-shielding material made of fine carbon particles dispersed in a resin has sufficient light-shielding properties, the insulation properties will deteriorate, resulting in poor display performance.
〈発明が解決しようとする課題〉
本発明は、上記問題を解決し、透明電極の上または下に
、遮光性に優れ且つ絶縁性に優れた液晶表示装置用遮光
フィルターを提供することを目的としている。<Problems to be Solved by the Invention> The present invention aims to solve the above-mentioned problems and provide a light-shielding filter for a liquid crystal display device having excellent light-shielding properties and excellent insulation properties on or below a transparent electrode. There is.
〈課題を解決するための手段〉
本発明の液晶表示装置用遮光フィルターは、内面に遮光
フィルター及び透明電極を有し、液晶層を挟持して対向
する２枚以上の透明な基板からなる液晶表示装置用遮光
フィルターにおいて、前記遮光フィルターが炭素微粒子
及び有機顔料を含むことを特徴とする。<Means for Solving the Problems> The light-shielding filter for a liquid crystal display device of the present invention has a light-shielding filter and a transparent electrode on the inner surface, and a liquid crystal display consisting of two or more transparent substrates facing each other with a liquid crystal layer sandwiched therebetween. The light-shielding filter for a device is characterized in that the light-shielding filter contains carbon fine particles and an organic pigment.
〈実施例〉
実施例１
光感光性のアクリル樹脂に１μｍ程度の粒子系の炭素微
粒子を８ｗｔ％分散し、更に、黒色に調整した有機顔料
を１０ｗｔ％分散して、遮光フィルター用に材料を作っ
た。<Examples> Example 1 A material for a light-blocking filter was made by dispersing 8 wt% of carbon fine particles of about 1 μm in a photosensitive acrylic resin and further dispersing 10 wt% of an organic pigment adjusted to black. Ta.
第１図に示すように、透明基板としてガラス基板１を使
用し、表面にパターンニングされた透明電極２を形成し
た。その上に前述の材料をコーティングし、必要部分に
光を照射して硬化させ、遮光フィルター３を形成して基
板とした。遮光フィルターのパターン幅は約５０μｍと
した。その基板に透明電極４を内面に形成した他の透明
基板５を対向させ、液晶６を挟んでノーマリーフ゛ラッ
クＴＮ方式の液晶表示装置を作った。遮光フィルターは
絶縁性であり、金属などの導電性フィルターを使用した
ときにみられた電極間の電気的ショートやリークなどの
問題は全くみられなかった。As shown in FIG. 1, a glass substrate 1 was used as a transparent substrate, and a patterned transparent electrode 2 was formed on the surface. The above-mentioned material was coated thereon, and the necessary portions were irradiated with light to be cured, thereby forming a light-shielding filter 3 and using it as a substrate. The pattern width of the light blocking filter was approximately 50 μm. Another transparent substrate 5 having a transparent electrode 4 formed on its inner surface was placed opposite to this substrate, and a liquid crystal 6 was sandwiched therebetween to fabricate a normally-black TN type liquid crystal display device. The light-shielding filter is insulating, and there were no problems such as electrical shorts or leaks between electrodes that were seen when using conductive filters such as metal.
上述の表示装置は、表示コントラスト比が１：３０であ
り、遮光フィルターがないときの表示コントラスト比１
： １５に比べて、大幅に表示品質が改善された。The display device described above has a display contrast ratio of 1:30, and a display contrast ratio of 1 when there is no light-blocking filter.
: Compared to 15, the display quality was significantly improved.
実施例２
実施例１において、液晶の表示方式をノーマリ−ホワイ
トＴＮ方式とした。遮光フィルターがない場合は、画素
間から光が漏れるので表示コントラスト比は１： １０
程度である。遮光フィルターを使用した場合、高電圧印
加時の透過率が十分低くなるので１： １００以上の
表示コントラスト比を得ることができた。Example 2 In Example 1, the liquid crystal display method was a normally white TN method. If there is no light-blocking filter, light leaks between pixels, so the display contrast ratio is 1:10.
That's about it. When a light shielding filter was used, the transmittance when high voltage was applied was sufficiently low, so that a display contrast ratio of 1:100 or more could be obtained.
実施例３
ポリイミド樹脂に１μｍ程度の粒子系の炭素微粒子を８
ｗｔ％分散し、更に、黒色に調整した有機顔料を１０ｗ
ｔ％分散して、遮光フィルター用に材料を作った。Example 3 8 carbon fine particles with a particle size of about 1 μm were added to polyimide resin.
10w of organic pigment dispersed in wt% and further adjusted to black
A material for a light-blocking filter was made by dispersing t%.
実施例１と同じように、透明基板としてガラス基板を使
用し、表面にパターンニングされた透明電極を形成した
。その上に前述の材料をオフセット印刷法を用いてコー
ティングした後熱硬化させ遮光フィルターを形成して基
板とした。遮光フィルターのパターン幅は約２００μｍ
とした。その基板に透明電極を内面に形成した他の透明
基板を対向させ、液晶を挟んでノーマリ−ブラックＴＮ
方式の液晶表示装置を作った。遮光フィルターは絶縁性
であり、金属などの導電性フィルターを使用したときに
みられた電極間の電気的ショートやリークなどの問題は
全くみられなかった。As in Example 1, a glass substrate was used as a transparent substrate, and a patterned transparent electrode was formed on the surface. The above-mentioned material was coated thereon using an offset printing method and then thermally cured to form a light-shielding filter to obtain a substrate. The pattern width of the light blocking filter is approximately 200μm.
And so. Another transparent substrate with transparent electrodes formed on the inner surface is placed opposite to that substrate, and normally black TN is used with the liquid crystal in between.
We created a liquid crystal display device using this method. The light-shielding filter is insulating, and there were no problems such as electrical shorts or leaks between electrodes that were seen when using conductive filters such as metal.
上述のようにして作った表示装置は、表示コントラスト
比が１＝ ３０であり、遮光フィルターがないときの表
示コントラスト比１： １５に比べて、大幅に表示品質
が改善された。背面に明るい光源と色フイルタ−フィル
ムを用ると、ＬＥＤや蛍光表示体と類似な表示を得るこ
とができるが、任意の色フイルタ−フィルムを用いるこ
とによって、任意の色表示を行うことができる。The display device manufactured as described above had a display contrast ratio of 1:30, which was a significant improvement in display quality compared to the display contrast ratio of 1:15 when no light-blocking filter was used. By using a bright light source and a color filter film on the back, a display similar to that of an LED or fluorescent display can be obtained, but by using any color filter film, any color display can be achieved. .
〈発明の効果〉
本発明は遮光性に優れ且つ絶縁性の遮光フィルターを提
供し、従来の金属遮光膜などでの問題を解決した。即ち
、特に単純マトリックス方式の液晶表示体のようなパタ
ーンニングされた透明電極を使用する場合において、電
極上に遮光フィルターを形成することができるので、・
構造が簡単で表示特性に優れた液晶表示装置を提供する
ことができる。<Effects of the Invention> The present invention provides a light-shielding filter with excellent light-shielding properties and insulating properties, and solves the problems with conventional metal light-shielding films. That is, especially when using a patterned transparent electrode such as a simple matrix type liquid crystal display, a light shielding filter can be formed on the electrode.
A liquid crystal display device with a simple structure and excellent display characteristics can be provided.
第１図は、本発明の一実施例を示す図である。
１・・・ガラス基板 ２・・・透明電極 ３・・・遮光
フィルター ４・・・透明電極 ５・・・他の透明基板
６・・・液晶
第２図は、液晶表示装置の電気光学特性の例を示す図で
ある。
１５・・・電圧無印加時の透過率 １６・・・非選択電
圧印加時の透過率
第３図は、従来の技術の一例を示す図である。
１１・・・透明基板 １２・・・透明電極 １３・・・
金属遮光ｊｉ１４・・・絶縁膜
以上
出願人 セイコーエプソン株式会社
代理人 弁理士 鈴木喜三部 他−名FIG. 1 is a diagram showing an embodiment of the present invention. 1... Glass substrate 2... Transparent electrode 3... Light shielding filter 4... Transparent electrode 5... Other transparent substrate 6... Liquid crystal Figure 2 shows the electro-optical characteristics of the liquid crystal display device. It is a figure which shows an example. 15...Transmittance when no voltage is applied 16...Transmittance when non-selective voltage is applied FIG. 3 is a diagram showing an example of a conventional technique. 11... Transparent substrate 12... Transparent electrode 13...
Metal shading ji14...Insulating film and above Applicant Seiko Epson Co., Ltd. Agent Patent attorney Kizobe Suzuki and others
Claims (1)
挟持して対向する２枚以上の透明な基板からなる液晶表
示装置用遮光フィルターにおいて、前記遮光フィルター
が炭素微粒子及び有機顔料を含むことを特徴とする液晶
表示装置用遮光フィルター。A light-shielding filter for a liquid crystal display device comprising two or more transparent substrates facing each other with a liquid crystal layer sandwiched therebetween, the light-shielding filter having a light-shielding filter and a transparent electrode on the inner surface, characterized in that the light-shielding filter contains carbon fine particles and an organic pigment. A light blocking filter for liquid crystal display devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2148096A JPH0440420A (en) | 1990-06-06 | 1990-06-06 | Light shielding filter for liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2148096A JPH0440420A (en) | 1990-06-06 | 1990-06-06 | Light shielding filter for liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0440420A true JPH0440420A (en) | 1992-02-10 |
Family
ID=15445158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2148096A Pending JPH0440420A (en) | 1990-06-06 | 1990-06-06 | Light shielding filter for liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0440420A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0715203A4 (en) * | 1994-06-21 | 1997-07-02 | Toray Industries | Resin black matrix for liquid crystal display |
| US6128057A (en) * | 1996-03-08 | 2000-10-03 | Canon Kabushiki Kaisha | LCD with masking member having multiple portions having different characteristics |
-
1990
- 1990-06-06 JP JP2148096A patent/JPH0440420A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0715203A4 (en) * | 1994-06-21 | 1997-07-02 | Toray Industries | Resin black matrix for liquid crystal display |
| US5880799A (en) * | 1994-06-21 | 1999-03-09 | Toray Industries, Inc. | Resin black matrix for liquid crystal display device |
| 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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