JPH0786611B2 - Liquid crystal display element manufacturing method - Google Patents
Liquid crystal display element manufacturing methodInfo
- Publication number
- JPH0786611B2 JPH0786611B2 JP1122294A JP12229489A JPH0786611B2 JP H0786611 B2 JPH0786611 B2 JP H0786611B2 JP 1122294 A JP1122294 A JP 1122294A JP 12229489 A JP12229489 A JP 12229489A JP H0786611 B2 JPH0786611 B2 JP H0786611B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- polyimide
- film
- alignment film
- 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.)
- Expired - Lifetime
Links
Landscapes
- Liquid Crystal (AREA)
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。TECHNICAL FIELD The present invention relates to a relatively large liquid crystal display element mainly used as a display for OA 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TN型
表示からコントラストの高いSTN型表示やＤ−ST型表示
に移行してきている。(B) Conventional technology With the increase in size of displays, liquid crystal display elements are shifting from conventional TN type displays to STN type displays and D-ST type displays with high contrast.
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、1015〜1016Ω・cm程度の高い体積抵抗率を有する。In this type of conventional liquid crystal display element, in order to align the liquid crystal, a thin polyimide resin alignment film formed by printing or spinner method is used, but this alignment film is 10 15 to 10 16 Ω. It has a high volume resistivity of about cm.
（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1015〜1016Ω・cmと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があった。(C) Problems to be Solved by the Invention In a conventional liquid crystal display element, an alignment film (polyimide) is used.
Has a high volume resistivity of 10 15 to 10 16 Ω ・ cm, which causes discharge traces of static electricity generated at alignment treatment spots or other static electricity generation spots when the display is turned on, significantly lowering 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。The present invention has been made in view of such circumstances, and reduces the electric resistance of the alignment material used for the liquid crystal display element to reduce the static electricity generation amount or the static electricity charge amount of the alignment treatment or other static electricity generation locations. By doing so, a liquid crystal display element of high display quality is provided which does not cause display unevenness (such as discharge traces and charge traces 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
極面が互いに対向するように配置して、各基板の対向側
に配向膜を設け、基板間に液晶を封入した液晶表示素子
の製造方法において、各基板に電極を積層し、各基板の
電極積層側にポリイミドを膜厚300〜600Åで塗布してポ
リイミド膜を形成し、ポリイミド膜を200℃程度の温度
で焼成してポリイミド膜の体積抵抗率を1011〜1012Ω・
cmに調整し、ポリイミド膜を配向処理した後、２枚の基
板間に液晶を封入することを特徴とする液晶表示素子の
製造方法である。(D) Means for Solving the Problems The present invention is directed to disposing two substrates, each having electrodes laminated thereon, such that the electrode surfaces face each other, and providing an alignment film on the opposing side of each substrate, and In the method of manufacturing a liquid crystal display device in which liquid crystal is sealed in, electrodes are laminated on each substrate, polyimide is applied to the electrode lamination side of each substrate with a film thickness of 300 to 600 Å to form a polyimide film, and the polyimide film is 200 ° C. The volume resistivity of the polyimide film is 10 11 to 10 12 Ω
The method is a method for producing a liquid crystal display element, which comprises adjusting the film thickness to cm, orienting the polyimide film, and then enclosing a liquid crystal between two substrates.
上記液晶には、ツイステッドネマチック液晶やスーパー
ツ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 above liquid crystal, twisted nematic liquid crystal, super twisted nematic liquid crystal, or the like can be used. Polyimide is mainly used as the material of the alignment film. The volume resistivity of the orientation film can be determined by setting the firing temperature lower than before when performing the firing treatment after forming the orientation film on the substrate, or by adding a polymerization inhibitor to the orientation film material in advance. It can be lowered 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) Action By reducing the resistance of the alignment film, discharge marks and charge marks due to static electricity are eliminated and high display quality can be obtained.
（ヘ）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。
なおこれによって、この発明が限定されるものではな
い。(F) Embodiments The present invention will be described in detail below with reference to embodiments shown in the drawings.
The present invention is not limited to 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。ポリミイド配向膜４
は、スピンナー法あるいは印刷法にて電極３上に膜厚30
0〜600Å程度にて塗布形成された後、焼成処理される。
この時、焼成温度を低くすることで体積抵抗率を1011〜
1012Ω・cm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1015〜1016Ω・cm程度であ
る。そして、このポリイミド配向膜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 a structural explanatory view of a liquid crystal display element of the present invention. Reference numeral 1 is a polarizing plate, 2 is a soda glass substrate, 3 is a transparent electrode, and 4 is a polyimide alignment film. Polymide alignment film 4
Is a film thickness 30 on the electrode 3 by spinner method or printing method.
After being applied and formed at about 0 to 600Å, it is baked.
At this time, by lowering the firing temperature, the volume resistivity becomes 10 11 ~
Adjust to about 10 12 Ω · cm. That is, the firing temperature, which is around 250 ° C in the past, is lowered to about 200 ° C. The volume resistivity of a normal polyimide alignment film is about 10 15 to 10 16 Ω · cm. Then, the substrate 2 provided with the polyimide alignment film 4 is subjected to an alignment treatment, the two substrates (segment electrode side and common electrode side) are bonded together, and liquid crystal is sealed to form a liquid crystal display element. Reference numeral 5 is a seal 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1011〜1012Ω・cmに設定することができる。In the above examples, the firing temperature of the alignment film was lowered to reduce the volume resistivity of the alignment film. However, a material for the alignment film, for example, a polymerization inhibitor was previously added to polyimide,
By reducing the average molecular weight of the material, the volume resistivity of the alignment film can be set to 10 11 to 10 12 Ω · cm.
このようにして配向膜の体積抵抗率を1015〜1016Ω・cm
から1011〜1012Ω・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 10 15 to 10 16 Ωcm
From 10 11 to 10 12 Ωcm, the electrical resistance of the alignment film decreases and the electrostatic discharge traces appearing on the alignment film.
Charge marks are reduced.
（ト）発明の効果 この発明によれば、ポリイミド膜のような配向膜の形成
に際して、その材料に予め重合禁止剤を添加して、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
1011〜1012Ω・cmに調整することができ、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) Effect of the Invention According to the present invention, when the alignment film such as a polyimide film is formed, a polymerization inhibitor is added to the material in advance to reduce the average molecular weight, thereby reducing the volume resistivity of the alignment film.
It can be adjusted to 10 11 to 10 12 Ωcm, and the amount of static electricity generated in the alignment treatment area or other static electricity generation locations is reduced compared to the conventional case. Is alleviated, and the display quality when the display is lit can be improved.
第１図は、この発明の一実施例を示す構成説明図であ
る。 １……偏光板、２……ソーダガラス基板、 ３……透明電極、４……配向膜、 ５……シール樹脂、６……スペーサー。FIG. 1 is a configuration explanatory view showing an embodiment of the present invention. 1 ... Polarizing plate, 2 ... Soda glass substrate, 3 ... Transparent electrode, 4 ... Alignment film, 5 ... Seal resin, 6 ... Spacer.
Claims (1)
極面が互いに対向するように配置して、各基板の対向側
に配向膜を設け、基板間に液晶を封入した液晶表示素子
の製造方法において、各基板に電極を積層し、各基板の
電極積層側にポリイミドを膜厚300〜600Åで塗布してポ
リイミド膜を形成し、ポリイミド膜を配向処理した後、
２枚の基板間に液晶を封入すると共に、ポリイミドに予
め重合禁止剤を添加して、平均分子量を低下させること
により、ポリイミド膜の体積抵抗率を1011〜1012Ω・cm
に調整することを特徴とする液晶表示素子の製造方法。1. A liquid crystal display device in which two substrates, each having electrodes laminated thereon, are arranged so that their electrode surfaces face each other, an alignment film is provided on the opposite side of each substrate, and liquid crystal is sealed between the substrates. In the manufacturing method, electrodes are laminated on each substrate, polyimide is applied to the electrode lamination side of each substrate at a film thickness of 300 to 600 Å to form a polyimide film, and after orientation treatment of the polyimide film,
By enclosing a liquid crystal between two substrates and adding a polymerization inhibitor to the polyimide beforehand to reduce the average molecular weight, the volume resistivity of the polyimide film is 10 11 〜 10 12 Ω ・ cm.
A method for manufacturing a liquid crystal display device, comprising:
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 JPH02300723A (en) | 1990-12-12 |
| JPH0786611B2 true 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) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3471851B2 (en) | 1993-05-06 | 2003-12-02 | 株式会社半導体エネルギー研究所 | Liquid crystal display |
| JP5355970B2 (en) | 2008-09-16 | 2013-11-27 | 株式会社ジャパンディスプレイ | Liquid crystal display |
| JP5714673B2 (en) * | 2013-08-28 | 2015-05-07 | 株式会社ジャパンディスプレイ | Liquid crystal display |
| JP5883178B2 (en) * | 2015-03-11 | 2016-03-09 | 株式会社ジャパンディスプレイ | Liquid crystal display |
| JP6162273B2 (en) * | 2016-02-04 | 2017-07-12 | 株式会社ジャパンディスプレイ | Liquid crystal display |
| JP6430591B2 (en) * | 2017-06-14 | 2018-11-28 | 株式会社ジャパンディスプレイ | Alignment film varnish |
| JP6622885B2 (en) * | 2018-10-31 | 2019-12-18 | 株式会社ジャパンディスプレイ | Liquid crystal display |
| JP6925403B2 (en) * | 2018-10-31 | 2021-08-25 | 株式会社ジャパンディスプレイ | Liquid crystal display |
Family Cites Families (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
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02300723A (en) | 1990-12-12 |
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