JPS62265621A - Production of liquid crystal display element - Google Patents
Production of liquid crystal display elementInfo
- Publication number
- JPS62265621A JPS62265621A JP10926786A JP10926786A JPS62265621A JP S62265621 A JPS62265621 A JP S62265621A JP 10926786 A JP10926786 A JP 10926786A JP 10926786 A JP10926786 A JP 10926786A JP S62265621 A JPS62265621 A JP S62265621A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- display element
- dmoap
- crystal display
- substrates
- 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 40
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000000758 substrate Substances 0.000 claims abstract description 24
- 238000005406 washing Methods 0.000 claims abstract description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 17
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 210000002858 crystal cell Anatomy 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000005273 aeration Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000003566 sealing material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 11
- WSFMFXQNYPNYGG-UHFFFAOYSA-M dimethyl-octadecyl-(3-trimethoxysilylpropyl)azanium;chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCCCC[N+](C)(C)CCC[Si](OC)(OC)OC WSFMFXQNYPNYGG-UHFFFAOYSA-M 0.000 abstract description 10
- 238000007796 conventional method Methods 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- KZNMRPQBBZBTSW-UHFFFAOYSA-N [Au]=O Chemical compound [Au]=O KZNMRPQBBZBTSW-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910001922 gold oxide Inorganic materials 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 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
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
Abstract
Description
に産業上の利用分野】
本発明は自ｖＪ巾、事務機などの表示装置として広く用
いられている液晶表示装置に関するもので、詳細には、
動的散乱効果型（ＤＳ）、電界制御複屈折効果型（ＤＡ
Ｐ）、相転移効果型（ＰＣ）、ゲスト・ホスト効果型（
ＧＨ）、超ねじれ複屈折効果型（ＳＢＥ）などの垂直配
向処理を行なう液晶表示素子の製造方法に係るものであ
る。
Ｋ従来の技術】
従来この種の垂直配向処理をＮ、Ｎ−ジメチル−Ｎ−オ
クタデシル−３−アミノプロピルトリメトキシルクロラ
イド（以下ＤＭＯＡＰと略称する）を用いて行なうとき
の工程を、以下に手順の順に記すと、
■ 透明電極を設けた液晶基板の前記透明電極を覆うよ
うにシリコン酸化物などによる絶縁膜を、形成したもの
に、
■ 前記液晶４Ｓｉを＃ｒ ｉ！ｃ！ Ｄ Ｍ ＯＡ
Ｐ （１） １ ｍ ／ ’） ツトルの水溶液の静水
中に約１５分間浸漬した後に、
■ 次いで、純水の静水中に約１５分間浸漬して水洗し
、
■ 室温など適宜の条件で乾燥させ、
■ １２０℃にて３０分間の加熱乾燥を行なうものであ
って、
以上に述べた手順により前記ＤＭＯＡＰにより垂直配向
処理が行われていた。
Ｋ発明が解決しようとする問題点】
しかしながら、前記した従来の垂直配向の方法は、
第一の問題点として、しばしば部分的な配向斑を生ずる
ものであり、この配向斑が表示コントラストなどにも斑
となって表示され、観視者に不快感を与えるものであっ
た。
第二の問題点としては、この様にして処理された前記配
向膜が耐久性に劣るものであることで、発明者による信
頼性試験の結果では、温度６０℃、湿度９５％の１：囲
気中に放置したところ、２４０時間で前記した！直配向
特性は全くに失われるものであることが判明した。INDUSTRIAL APPLICATION FIELD The present invention relates to a liquid crystal display device that is widely used as a display device for personal computers, office machines, etc.
Dynamic scattering effect type (DS), electric field controlled birefringence effect type (DA)
P), phase transition effect type (PC), guest-host effect type (
This invention relates to a method for manufacturing a liquid crystal display element that performs vertical alignment processing such as GH), super twisted birefringence effect type (SBE), and the like. K PRIOR ART The steps for conventionally carrying out this type of vertical alignment treatment using N,N-dimethyl-N-octadecyl-3-aminopropyltrimethoxyl chloride (hereinafter abbreviated as DMOAP) are as follows. In order: (1) An insulating film made of silicon oxide or the like is formed to cover the transparent electrode of a liquid crystal substrate provided with a transparent electrode, and (2) the liquid crystal 4Si is #r i! c! D M OA
P (1) 1 m/') After being immersed in still water of an aqueous solution of Tuttle for about 15 minutes, ■ Next, immersed in still water of pure water for about 15 minutes and washed with water, and ■ Drying under appropriate conditions such as room temperature. (2) Heat drying was performed at 120° C. for 30 minutes, and the vertical alignment treatment was performed using the DMOAP according to the procedure described above. K Problems to be Solved by the Invention] However, the first problem with the above-mentioned conventional vertical alignment method is that it often causes local alignment unevenness, and this alignment unevenness also affects display contrast, etc. It was displayed as spots, which caused discomfort to the viewer. The second problem is that the alignment film treated in this way has poor durability, and according to the results of a reliability test conducted by the inventor, it was found that When I left it inside, it did the above in 240 hours! It was found that the direct alignment properties were completely lost.
本発明は前記した従来の問題点を解決するための具体的
手段として、透明電極と垂直配向膜とが設けられた少な
くとも二枚の基板を前記透明電極と前記垂直配向膜とが
内面側となるように定間隔に対峙し周辺部をシール材で
シールして液晶セルを形成し、該液晶セル内に液晶材を
封止して成る液晶表示素子において、該液晶表示素子の
少なくとも表示領域は前記透明電極を含めて全面を覆う
ように絶縁膜で被覆し、Ｎ、Ｎ−ジメチル−Ｎ−オクタ
デシル−３−アミノプロピルトリメトキシルクロライド
の０．１！？／リツトル乃至１０ｇ／リットルの水溶液
に加振、撹拌など動的状態で接触させたのちに動水によ
る水洗を行ない、その後に、加熱水蒸気槽で曝気したの
ちに、以後乾燥、加熱処理を成したことを特徴とする液
晶表示素子の製造方法を提供することで、前記した従来
の垂直配向処理に生じていた問題点を解決するものであ
る。
Ｋ実 施 例】
つぎに、本発明を第１図に示す一実施例に基づいて詳細
に説明する。
図に符号１ａで示すものは液晶基板であり、ガラス、樹
脂など適宜の透明な部材で形成され、一方の側の面には
酸化インジュウム、或いは酸化錫で透明Ｎ Ｎ ２ ａ
が形成されている。 この液晶基板１ａに垂直配向処
理を行なうときには、前記透明電極２ａが設けられた側
の少なくとも表示領域に前記透明電極２ａを覆うように
、シリコン、チタンなどの金ｉａ化物、或いはアクリル
、エポキシなどの樹脂により透明な絶縁膜３ａを膜厚１
００〜２０００人に形成し、該絶縁膜３ａに前記処理を
行なう。
ここで、本発明による垂直配向処理を説明すると前記の
ように処理が行われた液晶基板１ａはＤＭＯＡＰ （Ｎ
、Ｎ−ジメチル−Ｎ−オクタデシル−３−アミノプロピ
ルトリメトキシルクロライド）の水溶液中に浸漬される
が、このときの前記ＤＭＯＡＰの濃度は０．１ｇ／リッ
トル乃至１０ｇ／リットルが適宜であり、液温は室温以
上であれば良く、浸漬時間は１０秒乃至３０分が適宜な
ものであるが、特にこの浸漬の際に従来の方法と異なり
該ＤＭＯＡＰ水溶液をポンプ、撹拌機などの適宜な方法
で撹拌し水流を生ずるようにするか、或いは前記液晶基
板１ａの側をＳ＃７Ｉさせるかなどの方法で、前記ＤＭ
ＯＡＰ水溶液と前記液晶基板１ａとが相対的には動水の
状態で接していることが重要であり、この様な状態は他
の方法、例えばシャワーなどの方法でも容易に実施でき
るものであり、要はどのような方法でも前記した動水の
状態で接していることに本発明の第一の要旨があるもの
である。 次いで水洗が行われるが、この洗浄水は純
水が好ましく、水温は室温以上であれば良く、水洗時間
は２秒乃至３０秒が適宜であるが、このときにも、前記
ＤＭＯＡＰ水溶液に浸漬したときと同様に動水の状態で
行ない、その方法は上記した方法のいずれかを選択して
良い。 この水洗工程が行われた後の液晶基板１ａは
、更に７０〜８０℃の純水の加熱水蒸気が満たされた水
蒸気槽にいれて曝気をおこなう。 このように水蒸気
に曝気することで、その水蒸気の水よりも高い活性によ
り、なお前記液晶基板１ａの表面に残余する前記ＤＭＯ
ＡＰの余分のものは完全に除去されるものとなり、ここ
に本発明の第二の要旨がある。 以上の処理の後に前
記液晶基板１ａは８０℃乃至２００℃で１０分乃至１時
間の熱処理が行われて本発明の方法による垂直配向膜４
ａが形成されるが、このときの前記垂直配向膜４ａの膜
厚は一分子乃至数分子である。
以上に説明した本発明の方法で垂直配向処理が行われた
前記液晶基板を、発明者において温度６０℃、湿度９５
％の従来例の方法に行なったものと全くに同じ条件の耐
久試験を行なったところ、従来例のものが２４０時間で
垂直配向特性を全くに失ったのに対して、本発明の方法
のものは１０００時間の経過後においても垂直配向特性
は、全く正常であり、問題点となる配向斑を生ずること
もなく表示は正常に行われ、僅かにその浦費電力が２倍
に増加したのみであり、実用上に何等の問題点もないも
のであることが認められ、本発明の効果がＷ認された。
以上の説明は一方の液晶基板１ａについて行なったが、
他の一方の液晶基板１ｂｆ、：垂直配向処理を行ない垂
直配向膜４ｂを形成するときも上記で説明したものと全
くに同様であるので、説明は省略する。
以上に説明したようにして垂直配向膜４ａ、４ｂが形成
された液晶基板１ａ、１ｂの夫々は、前記垂直配向膜４
ａ、４ｂが内面になるように対峙され、周辺部をシール
材５でシールされ、内部に液晶６が封止されて目的とす
る液晶表示素子として完成される。
Ｋ発明の効果】
以上に説明したように、本発明によりＤＭＯ△Ｐ水溶液
に浸漬するときには、その水溶液と液晶基板とが動水の
状態で触れるようにしたことで、垂直配向膜の形成を完
全で強固なものとして耐久性を高くし、更に前記したも
のと同様な動水の状態で水洗も行い、更に水よりも活性
の強い加熱水蒸気に曝気するようにしたことで、形成さ
れた以外の余分の前記ＤＭＯＡＰを完全に除去して従来
生じていた配向斑もなくして表示品位も向上して、この
種の液晶表示素子の実用性の向上に優れた効果を奏する
ものである。As a specific means for solving the conventional problems described above, the present invention provides at least two substrates provided with a transparent electrode and a vertical alignment film, the transparent electrode and the vertical alignment film being on the inner side. In a liquid crystal display element in which a liquid crystal cell is formed by facing each other at regular intervals and sealing the peripheral portion with a sealing material, and a liquid crystal material is sealed within the liquid crystal cell, at least the display area of the liquid crystal display element is The entire surface including the transparent electrode is coated with an insulating film, and 0.1! ? / liter to 10 g/liter of aqueous solution under dynamic conditions such as shaking and stirring, followed by washing with moving water, followed by aeration in a heated steam tank, and subsequent drying and heat treatment. By providing a method for manufacturing a liquid crystal display element characterized by the following, the problems occurring in the conventional vertical alignment process described above are solved. K Embodiment Next, the present invention will be explained in detail based on an embodiment shown in FIG. What is indicated by the reference numeral 1a in the figure is a liquid crystal substrate, which is made of a suitable transparent material such as glass or resin, and one side is coated with transparent N N 2 a using indium oxide or tin oxide.
is formed. When vertical alignment processing is performed on this liquid crystal substrate 1a, a material such as silicon, gold oxide such as titanium, acrylic, epoxy, etc. is applied so as to cover the transparent electrode 2a at least in the display area on the side where the transparent electrode 2a is provided. A transparent insulating film 3a made of resin has a film thickness of 1
00 to 2000, and the insulating film 3a is subjected to the above treatment. Here, to explain the vertical alignment treatment according to the present invention, the liquid crystal substrate 1a treated as described above is DMOAP (N
, N-dimethyl-N-octadecyl-3-aminopropyltrimethoxyl chloride). At this time, the concentration of DMOAP is suitably between 0.1 g/liter and 10 g/liter, and the liquid temperature The immersion time may be at least room temperature, and the appropriate immersion time is 10 seconds to 30 minutes. In particular, during this immersion, unlike conventional methods, the DMOAP aqueous solution must be stirred using an appropriate method such as a pump or a stirrer. The DM can be heated by a method such as generating a water flow or making the side of the liquid crystal substrate 1a S#7I.
It is important that the OAP aqueous solution and the liquid crystal substrate 1a are in contact with each other in a relatively moving state, and such a state can be easily achieved by other methods, such as a shower. The point is that the first gist of the present invention lies in the fact that the water is in contact with the water in the above-mentioned state of motion no matter what method is used. Next, washing with water is carried out, and this washing water is preferably pure water, the water temperature should be at least room temperature, and the washing time is suitably 2 seconds to 30 seconds. It is carried out in a state of moving water as before, and the method may be selected from any of the methods described above. After this water washing step, the liquid crystal substrate 1a is further placed in a steam tank filled with heated steam of pure water at 70 to 80° C. for aeration. By aerating the water vapor in this way, the activity of the water vapor is higher than that of water, so that the DMO remaining on the surface of the liquid crystal substrate 1a is removed.
The redundant AP can be completely removed, which is the second gist of the present invention. After the above treatment, the liquid crystal substrate 1a is subjected to heat treatment at 80° C. to 200° C. for 10 minutes to 1 hour to form a vertical alignment film 4 according to the method of the present invention.
a is formed, and the thickness of the vertical alignment film 4a at this time is one molecule to several molecules. The liquid crystal substrate, which has been vertically aligned by the method of the present invention described above, was prepared by the inventor at a temperature of 60°C and a humidity of 95°C.
When a durability test was conducted under exactly the same conditions as the conventional method, the conventional method completely lost its vertical alignment property after 240 hours, whereas the method of the present invention Even after 1000 hours had passed, the vertical alignment characteristics were completely normal, and the display was performed normally without any problematic alignment spots, and the Urakashi power was only doubled. It was recognized that there were no problems in practical use, and the effects of the present invention were recognized as W. Although the above explanation was made regarding one liquid crystal substrate 1a,
The other liquid crystal substrate 1bf: The vertical alignment process is performed to form the vertical alignment film 4b in the same manner as described above, so the explanation will be omitted. Each of the liquid crystal substrates 1a and 1b on which the vertical alignment films 4a and 4b are formed as described above has the vertical alignment films 4a and 4b formed thereon.
A and 4b are opposed to each other so that the inner surfaces thereof are formed, the peripheral portion is sealed with a sealing material 5, and a liquid crystal 6 is sealed inside to complete the intended liquid crystal display element. [Effects of the Invention] As explained above, according to the present invention, when the liquid crystal substrate is immersed in the DMO△P aqueous solution, the aqueous solution and the liquid crystal substrate come into contact with each other in a state of moving water, thereby completely preventing the formation of a vertical alignment film. By making it strong and durable, and washing it with water under the same moving water conditions as mentioned above, and aerating it with heated steam, which is more active than water, it is possible to make it more durable. By completely removing the excess DMOAP, the alignment unevenness that conventionally occurs is eliminated, and the display quality is improved, resulting in an excellent effect in improving the practicality of this type of liquid crystal display element.
第１図は本発明に係る液晶表示素子の製造方法の一実施
例を示す新面図である。
１ａ、１ｂ・・・・・・液晶基板
２ａ、２ｂ・・・・・・透明電極
３ａ、３ｂ・・・・・・絶縁膜
４ａ、４ｂ・・・・・・垂直配向膜
特許出願人 スタンレー電気株式会社同
秋 元 不二三 ゴー、ユ弐立七FIG. 1 is a new view showing an embodiment of the method for manufacturing a liquid crystal display element according to the present invention. 1a, 1b...Liquid crystal substrate 2a, 2b...Transparent electrodes 3a, 3b...Insulating film 4a, 4b...Vertical alignment film Patent applicant Stanley Electric Dodo Co., Ltd.
Fujizo Akimoto Go, Yu Ni Rishichi
Claims (1)
基板を前記透明電極と前記垂直配向膜とが内面側となる
ように定間隔に対峙し周辺部をシール材でシールして液
晶セルを形成し、該液晶セル内に液晶材を封止して成る
液晶表示素子において、該液晶表示素子の少なくとも表
示領域は前記透明電極を含めて全面を覆うように絶縁膜
で被覆し、Ｎ，Ｎ−ジメチル−Ｎ−オクタデシル−３−
アミノプロピルトリメトキシルクロライドの０．１ｇ／
リットル乃至１０ｇ／リットルの水溶液に加振、撹拌な
ど動的状態で接触させたのちに動水による水洗を行ない
、その後に、加熱水蒸気槽で曝気したのちに、以後乾燥
、加熱処理を成したことを特徴とする液晶表示素子の製
造方法。At least two substrates provided with a transparent electrode and a vertical alignment film are placed facing each other at regular intervals so that the transparent electrode and the vertical alignment film are on the inner side, and the peripheral portions are sealed with a sealing material to form a liquid crystal cell. In a liquid crystal display element formed by forming a liquid crystal material and sealing a liquid crystal material in the liquid crystal cell, at least the display area of the liquid crystal display element is covered with an insulating film so as to cover the entire surface including the transparent electrode, -dimethyl-N-octadecyl-3-
0.1g/aminopropyltrimethoxyl chloride
After being brought into contact with an aqueous solution of 1 to 10 g/liter in a dynamic state such as shaking or stirring, washing with moving water was performed, and then aeration was performed in a heated steam tank, followed by drying and heat treatment. A method for manufacturing a liquid crystal display element characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10926786A JPS62265621A (en) | 1986-05-13 | 1986-05-13 | Production of liquid crystal display element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10926786A JPS62265621A (en) | 1986-05-13 | 1986-05-13 | Production of liquid crystal display element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62265621A true JPS62265621A (en) | 1987-11-18 |
Family
ID=14505834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10926786A Pending JPS62265621A (en) | 1986-05-13 | 1986-05-13 | Production of liquid crystal display element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62265621A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56138716A (en) * | 1980-04-01 | 1981-10-29 | Asahi Glass Co Ltd | Liquid crystal element |
| JPS57105722A (en) * | 1980-12-24 | 1982-07-01 | Alps Electric Co Ltd | Liquid crystal display element |
| JPS57114121A (en) * | 1981-01-07 | 1982-07-15 | Hitachi Ltd | Formation of liquid crystal orienting film |
| JPS581129A (en) * | 1981-06-26 | 1983-01-06 | Alps Electric Co Ltd | Two-layer type and guest-host type liquid crystal display element and its manufacture |
| JPS60136717A (en) * | 1983-12-26 | 1985-07-20 | Matsushita Electric Ind Co Ltd | Liquid crystal orienting film for vertical orientation |
-
1986
- 1986-05-13 JP JP10926786A patent/JPS62265621A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56138716A (en) * | 1980-04-01 | 1981-10-29 | Asahi Glass Co Ltd | Liquid crystal element |
| JPS57105722A (en) * | 1980-12-24 | 1982-07-01 | Alps Electric Co Ltd | Liquid crystal display element |
| JPS57114121A (en) * | 1981-01-07 | 1982-07-15 | Hitachi Ltd | Formation of liquid crystal orienting film |
| JPS581129A (en) * | 1981-06-26 | 1983-01-06 | Alps Electric Co Ltd | Two-layer type and guest-host type liquid crystal display element and its manufacture |
| JPS60136717A (en) * | 1983-12-26 | 1985-07-20 | Matsushita Electric Ind Co Ltd | Liquid crystal orienting film for vertical orientation |
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