JPH02300723A - Liquid crystal display element - Google Patents
Liquid crystal display elementInfo
- Publication number
- JPH02300723A JPH02300723A JP12229489A JP12229489A JPH02300723A JP H02300723 A JPH02300723 A JP H02300723A JP 12229489 A JP12229489 A JP 12229489A JP 12229489 A JP12229489 A JP 12229489A JP H02300723 A JPH02300723 A JP H02300723A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- orientation film
- volume resistivity
- alignment film
- substrate
- 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
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 23
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 230000005611 electricity Effects 0.000 abstract description 11
- 230000003068 static effect Effects 0.000 abstract description 11
- 229920001721 polyimide Polymers 0.000 abstract description 8
- 239000004642 Polyimide Substances 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 6
- 239000004988 Nematic liquid crystal Substances 0.000 abstract description 4
- 239000003112 inhibitor Substances 0.000 abstract description 3
- 238000006116 polymerization reaction Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 238000010304 firing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 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
- 238000007789 sealing Methods 0.000 description 1
- 238000009331 sowing Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
この発明は、主にＯＡ機器やコンピューター機器のディ
スプレイとして利用される比較的大型の液晶表示素子に
関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a relatively large liquid crystal display element used mainly as a display for office automation equipment and computer equipment.
（ロ）従来の技術
ディスプレイの大型化に伴い液晶表示素子は従−来のＴ
Ｎ型表示からコントラストの高いＳＴＮ型表示やＤ−８
Ｔ型表示に移行してきている。(b) Conventional technology With the increase in the size of displays, liquid crystal display elements have changed from conventional T
From N type display to high contrast STN type display and D-8
There is a shift to T-type display.
従来のこの種の液晶表示素子においては、液晶を配向さ
せる為に、印刷あるいはスピンナー法にて形成した薄い
ポリイミド樹脂の配向膜を用いているが、この配向膜は
、１０〜１０ Ω・ｃｍ程度の高い体積抵抗率を有する
。In conventional liquid crystal display elements of this type, a thin polyimide resin alignment film formed by printing or a spinner method is used to align the liquid crystal, but this alignment film has a thickness of about 10 to 10 Ω·cm. It has a high volume resistivity.
（ハ）発明が解決しようとする課題
従来の液晶表示素子においては、配向膜（ポリイミド）
の体積抵抗率が１０〜１０１′Ω・ｃｍとｊ
高い為に配向処理箇所あるいはその他の静電気発生箇所
に生じた静電気の放電跡・帯電跡が表示点灯時に現われ
、表示品位を著しく低下させるという問題点かあった。(c) Problems to be solved by the invention In conventional liquid crystal display elements, alignment films (polyimide)
Due to the high volume resistivity of 10 to 101' Ω・cm, traces of discharge and charging of static electricity generated in the alignment processing area or other static electricity generating areas appear when the display is turned on, which significantly deteriorates the display quality. There was a point.
この発明は、このような事情を考慮してなされたもので
、液晶表示素子に使用する配向材料の電気抵抗を低下さ
せて、配向処理あるいはその他静電気発生箇所の静電気
発生量あるいは静電気帯電量を減少させることによって
表示点灯時に表示ムラ（静電気による放電跡・帯電跡な
ど）を生じることのない表示品位の高い液晶表示素子を
提供するものである。This invention was made in consideration of these circumstances, and it reduces the electrical resistance of the alignment material used in liquid crystal display elements, thereby reducing the amount of static electricity generated or the amount of static electricity charged in the alignment process or other locations where static electricity is generated. This provides a liquid crystal display element with high display quality that does not cause display unevenness (discharge marks, charging marks, etc. due to static electricity) when the display is turned on.
（ニ）課題を解決するための手段
この発明は、それぞれに電極を積層した２枚の基板を電
極面が互に対向するように配置して、その間に液晶を封
入した液晶表示素子において、基板の液晶との接触面に
配向膜を設け、かつ、配向膜の体積抵抗率を１０／２Ω
・Ｃｌｌ１以下に設定したことを特徴とする液晶表示素
子である。(d) Means for Solving the Problems This invention provides a liquid crystal display device in which two substrates each having an electrode laminated thereon are arranged such that the electrode surfaces face each other, and a liquid crystal is sealed between the substrates. An alignment film is provided on the contact surface with the liquid crystal, and the volume resistivity of the alignment film is 10/2Ω.
- A liquid crystal display element characterized by setting Cll1 or less.
上記液晶には、ツィステッドネマチック液晶やスーパー
ライテッドネマチック液晶などを使用することができる
。配向膜の材料としては、主にポリイミドが使用される
。配向膜の体積抵抗率は、配向膜を基板上に成膜したの
ち、焼成処理を行うときに、焼成温度を従来よりも低く
設定するか、又は配向膜材料に予め重合禁止剤を添加し
て分子量を低く設定することにより、低下させることが
できる。As the liquid crystal, twisted nematic liquid crystal, super lighted nematic liquid crystal, etc. can be used. Polyimide is mainly used as the material for the alignment film. The volume resistivity of the alignment film can be determined by setting the baking temperature lower than before when baking the alignment film after forming it on the substrate, or by adding a polymerization inhibitor to the alignment film material in advance. It can be reduced by setting the molecular weight low.
（ホ）作用
配向膜の抵抗の低下をはかることにより、静電気による
放電跡・帯電跡がなくなり高表示品位を得ることが出来
る。(e) Function: By reducing the resistance of the alignment film, there are no discharge marks or charging marks due to static electricity, and high display quality can be obtained.
（へ）実施例 以下、図面に示す実施例を用いてこの発明を詳述する。(f) Example Hereinafter, this invention will be explained in detail using embodiments shown in the drawings.
なおこれによって、この発明が限定されるものではない
。Note that this invention is not limited by this.
第１図は、この発明の液晶表示素子の構成説明図である
。１は偏光板、２はソーダガラス基板、３は透明電極、
４はポリイミド配向膜である。ボリミイド配向膜４は、
スピンナー法あるいは印刷法にて電極３上に膜厚３００
〜６００ Ａ程度にて塗布形成された後、焼成処理され
る。この蒔、焼成温度を低くすることで体積抵抗率を１
０〃〜１０／２Ω・Ｃｌ１１程度に調整する。つまり、
従来２５０℃前後である焼成温度を２００℃程度まで下
げる。なお、通常のポリイミド配向膜の体積抵抗率１０
〜１０／６Ω・ｃｍ程度である。そして、このポリイー
ミド配向膜４を付けた基板２を配向処理し、２枚の基板
（セグメント電極側とコモン電極側）を貼合せ液晶を封
入して液晶表示素子を形成する。５はシール樹脂、６は
セル厚を保つ為のスペーサーである。FIG. 1 is an explanatory diagram of the structure of a liquid crystal display element of the present invention. 1 is a polarizing plate, 2 is a soda glass substrate, 3 is a transparent electrode,
4 is a polyimide alignment film. The borimide alignment film 4 is
A film thickness of 300 mm is formed on the electrode 3 using a spinner method or a printing method.
After being coated and formed at about 600 A, it is fired. By lowering this sowing and firing temperature, the volume resistivity can be reduced to 1.
Adjust to about 0 to 10/2Ω・Cl11. In other words,
The firing temperature, which is conventionally around 250°C, is lowered to around 200°C. Note that the volume resistivity of a normal polyimide alignment film is 10
~10/6 Ω·cm. Then, the substrate 2 with the polyimide alignment film 4 attached thereto is subjected to an alignment treatment, and the two substrates (segment electrode side and common electrode side) are bonded together and liquid crystal is encapsulated to form a liquid crystal display element. 5 is a sealing resin, and 6 is a spacer for maintaining the cell thickness.
なお、上記実施例においては、配向膜の焼成温３一
度を低下させて配向膜の体積抵抗率を低下させたが、配
向膜の材料、たとえばポリイミドに予め重合禁止剤を添
加して、材料の平均分子量を低下させることにより、配
向膜の体積抵抗率を１０１２〜１０′２Ω・ＣＩに設定
することができる。In the above example, the firing temperature of the alignment film was lowered by 3 times to lower the volume resistivity of the alignment film, but a polymerization inhibitor was added in advance to the material of the alignment film, for example, polyimide, to increase the By lowering the average molecular weight, the volume resistivity of the alignment film can be set to 1012 to 10'2 Ω·CI.
このようにして配向膜の体積抵抗率を１０／ｒ〜１０
Ω−ｃｍから１０〜１０／２Ω−ｃｍに引下げることに
より、配向膜の電気抵抗が低下し、配向膜に出現する静
電気の放電跡・帯電跡が減少する。In this way, the volume resistivity of the alignment film is increased to 10/r~10
By lowering the resistance from Ω-cm to 10 to 10/2 Ω-cm, the electrical resistance of the alignment film is reduced, and the traces of electrostatic discharge and charging that appear on the alignment film are reduced.
（ト）発明の効果
この発明によれば、従来に比べて、配向処理箇所又はそ
の他の静電気発生箇所に生ずる静電気量が減少するため
、配向膜に発生する静電気の放電跡・帯電跡が緩和され
、表示点灯時の表示品位を向上させることが出来る。(G) Effects of the Invention According to the present invention, the amount of static electricity generated at the alignment processing area or other static electricity generation areas is reduced compared to the conventional method, so that the discharge marks and charging marks of static electricity generated on the alignment film are alleviated. , it is possible to improve the display quality when the display is turned on.
第１図は、この発明の一実施例を示す構成説明図である
。FIG. 1 is a configuration explanatory diagram showing an embodiment of the present invention.
Claims (1)
に対向するように配置して、その間に液晶を封入した液
晶表示素子において、基板の液晶との接触面に配向膜を
設け、かつ、配向膜の体積抵抗率を１０＾１＾２Ω・ｃ
ｍ以下に設定したことを特徴とする液晶表示素子。1. In a liquid crystal display element in which two substrates each having a laminated electrode are arranged so that the electrode surfaces face each other and a liquid crystal is sealed between them, an alignment film is provided on the contact surface of the substrate with the liquid crystal, And the volume resistivity of the alignment film is 10^1^2Ω・c
A liquid crystal display element characterized by being set to less than m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1122294A JPH0786611B2 (en) | 1989-05-15 | 1989-05-15 | Liquid crystal display element manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1122294A JPH0786611B2 (en) | 1989-05-15 | 1989-05-15 | Liquid crystal display element manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02300723A true JPH02300723A (en) | 1990-12-12 |
| JPH0786611B2 JPH0786611B2 (en) | 1995-09-20 |
Family
ID=14832398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1122294A Expired - Lifetime JPH0786611B2 (en) | 1989-05-15 | 1989-05-15 | Liquid crystal display element manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0786611B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06317802A (en) * | 1993-05-06 | 1994-11-15 | Semiconductor Energy Lab Co Ltd | Liquid crystal display device |
| JP2010072011A (en) * | 2008-09-16 | 2010-04-02 | Hitachi Displays Ltd | Liquid crystal display |
| JP2014038335A (en) * | 2013-08-28 | 2014-02-27 | Japan Display Inc | Liquid crystal display |
| JP2015135516A (en) * | 2015-03-11 | 2015-07-27 | 株式会社ジャパンディスプレイ | Liquid crystal display |
| JP2016085476A (en) * | 2016-02-04 | 2016-05-19 | 株式会社ジャパンディスプレイ | Liquid crystal display device |
| JP2017167563A (en) * | 2017-06-14 | 2017-09-21 | 株式会社ジャパンディスプレイ | Varnish for alignment film |
| JP2019023754A (en) * | 2018-10-31 | 2019-02-14 | 株式会社ジャパンディスプレイ | Liquid crystal display |
| JP2020034948A (en) * | 2018-10-31 | 2020-03-05 | 株式会社ジャパンディスプレイ | Liquid crystal display |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6365423A (en) * | 1986-09-08 | 1988-03-24 | Matsushita Electric Ind Co Ltd | Field effect type liquid crystal display panel |
| JPS6378125A (en) * | 1986-09-22 | 1988-04-08 | Konica Corp | Active matrix type liquid crystal display device |
-
1989
- 1989-05-15 JP JP1122294A patent/JPH0786611B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6365423A (en) * | 1986-09-08 | 1988-03-24 | Matsushita Electric Ind Co Ltd | Field effect type liquid crystal display panel |
| JPS6378125A (en) * | 1986-09-22 | 1988-04-08 | Konica Corp | Active matrix type liquid crystal display device |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06317802A (en) * | 1993-05-06 | 1994-11-15 | Semiconductor Energy Lab Co Ltd | Liquid crystal display device |
| US6525795B1 (en) | 1993-05-06 | 2003-02-25 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device |
| US9188811B2 (en) | 2008-09-16 | 2015-11-17 | Japan Display Inc. | Liquid crystal display device |
| US8497002B2 (en) | 2008-09-16 | 2013-07-30 | Hitachi Displays, Ltd. | Liquid crystal display device |
| JP2010072011A (en) * | 2008-09-16 | 2010-04-02 | Hitachi Displays Ltd | Liquid crystal display |
| US10168579B2 (en) | 2008-09-16 | 2019-01-01 | Japan Display Inc. | Liquid crystal display device |
| US10852588B2 (en) | 2008-09-16 | 2020-12-01 | Japan Display Inc. | Liquid crystal display device |
| JP2014038335A (en) * | 2013-08-28 | 2014-02-27 | Japan Display Inc | Liquid crystal display |
| JP2015135516A (en) * | 2015-03-11 | 2015-07-27 | 株式会社ジャパンディスプレイ | Liquid crystal display |
| JP2016085476A (en) * | 2016-02-04 | 2016-05-19 | 株式会社ジャパンディスプレイ | Liquid crystal display device |
| JP2017167563A (en) * | 2017-06-14 | 2017-09-21 | 株式会社ジャパンディスプレイ | Varnish for alignment film |
| JP2019023754A (en) * | 2018-10-31 | 2019-02-14 | 株式会社ジャパンディスプレイ | Liquid crystal display |
| JP2020034948A (en) * | 2018-10-31 | 2020-03-05 | 株式会社ジャパンディスプレイ | Liquid crystal display |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0786611B2 (en) | 1995-09-20 |
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