JP2769060B2 - Manufacturing method of liquid crystal display element - Google Patents
Manufacturing method of liquid crystal display elementInfo
- Publication number
- JP2769060B2 JP2769060B2 JP3329702A JP32970291A JP2769060B2 JP 2769060 B2 JP2769060 B2 JP 2769060B2 JP 3329702 A JP3329702 A JP 3329702A JP 32970291 A JP32970291 A JP 32970291A JP 2769060 B2 JP2769060 B2 JP 2769060B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal injection
- rubbing
- manufacturing
- display element
- 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
【０００１】[0001]
【産業上の利用分野】本発明は、液晶表示素子（以下Ｌ
ＣＤという）の製造方法に関し、特にラビング処理方法
に関する。The present invention relates to a liquid crystal display (hereinafter referred to as L
CD), and particularly to a rubbing treatment method.
【０００２】[0002]
【従来の技術】従来、ＬＣＤの製造にあたっては、図３
に示すようにまず、基板（１），（２）の一方の面にそ
れぞれ透明電極（３），（４）を形成し、この透明電極
（３），（４）上に配向膜（５），（６）を形成する。
次いで、配向膜（５），（６）上に布などにより一定方
向にラビングすることにより配向処理を行った後、基板
（１），（２）のいずれか一方にシ−ル材を塗布し、基
板（１），（２）を貼合わせる。このようにして作製さ
れた液晶セルの間隙に液晶を注入し、更に基板（１），
（２）の外面にそれぞれ偏光板（７），（８）を貼付け
てＬＣＤが作製される。2. Description of the Related Art Conventionally, in manufacturing an LCD, FIG.
First, transparent electrodes (3) and (4) are formed on one surface of the substrates (1) and (2), respectively, and an alignment film (5) is formed on the transparent electrodes (3) and (4). , (6).
Next, after performing an alignment treatment by rubbing the alignment films (5) and (6) in a certain direction with a cloth or the like, a sealing material is applied to one of the substrates (1) and (2). And the substrates (1) and (2). Liquid crystal is injected into the gap of the liquid crystal cell manufactured in this manner, and further, the substrate (1),
The polarizing plates (7) and (8) are attached to the outer surface of (2), respectively, to complete the LCD.
【０００３】[0003]
【発明が解決しようとする課題】ところで、図２に示す
ようにラビング方向Ｒを液晶注入口（１０）側に向かう
方向に設定すると、液晶を注入した際に液晶セル内に気
泡が発生したり、液晶の注入時間が多くかかってしまう
という問題点がある。この現象は、液晶のねじれ角が１
８０°以上のいわゆるＳＴＮ−ＬＣＤにおいて顕著であ
る。特に、気泡が発生した場合、気泡が存在する状態で
液晶を封止すると気泡が永久に残り、ＬＣＤとして表示
不良を引き起こしてしまうという問題がある。そこで、
液晶注入口（１０）を複数個設け、時間当りの液晶注入
量を多くすることにより上記課題を解決する方法が考え
られているが、液晶注入口（１０）の数が増えると液晶
セルの間隙を決定づけているシ−ル材に切欠部が増加す
るため所定の間隙が得にくくなると同時に耐湿性も劣化
するという問題が生じる。When the rubbing direction R is set to the direction toward the liquid crystal injection port (10) as shown in FIG. 2, bubbles may be generated in the liquid crystal cell when the liquid crystal is injected. However, there is a problem that it takes a long time to inject the liquid crystal. This phenomenon occurs when the twist angle of the liquid crystal is 1
This is remarkable in a so-called STN-LCD of 80 ° or more. In particular, when bubbles are generated, if the liquid crystal is sealed in a state where the bubbles are present, the bubbles remain forever, and there is a problem that a display failure occurs as an LCD. Therefore,
A method of solving the above problem by providing a plurality of liquid crystal injection ports (10) and increasing the amount of liquid crystal injection per time has been considered. However, if the number of liquid crystal injection ports (10) increases, the gap between the liquid crystal cells increases. However, there is a problem that it becomes difficult to obtain a predetermined gap because the number of cutouts increases in the seal material that determines the moisture resistance, and that the moisture resistance also deteriorates.
【０００４】従って、本発明はＬＣＤの性能，信頼性を
劣化させることなく、液晶セルの気泡発生を防止すると
共に液晶注入時間の短縮を図ることを目的とする。Accordingly, it is an object of the present invention to prevent the generation of bubbles in a liquid crystal cell and to shorten the liquid crystal injection time without deteriorating the performance and reliability of the LCD.
【０００５】[0005]
【課題を解決するための手段】ラビングの方向を、液晶
注入口から遠ざかる方向すなわち、液晶の注入流れ方向
とほぼ一致させるように傾斜させることにより前記課題
を解決する。The above object is achieved by inclining the rubbing direction in a direction away from the liquid crystal injection port, that is, so as to substantially coincide with the flow direction of liquid crystal injection.
【０００６】[0006]
【作用】図４に示すように液晶分子（１２）は、配向膜
（５）上のラビング方向Ｒに並び、かつラビング方向Ｒ
に若干傾斜することが知られている。液晶注入口（１
０）へ向ってラビングすると図５に示すように液晶分子
（１２）の傾きは、液晶の注入方向Ａと対抗する形にな
るため液晶が入りにくくなると同時に気泡が生じやすく
なる。これに対して本発明では、図６のように液晶分子
（１２）傾きと液晶の注入方向Ａが順方向となるため液
晶が入りやすくなり、気泡も生じなくなる。As shown in FIG. 4, the liquid crystal molecules (12) are aligned in the rubbing direction R on the alignment film (5), and
Is known to be slightly inclined. Liquid crystal inlet (1
When rubbing toward 0), as shown in FIG. 5, the inclination of the liquid crystal molecules (12) becomes opposite to the injection direction A of the liquid crystal. On the other hand, in the present invention, as shown in FIG. 6, the inclination of the liquid crystal molecules (12) and the injection direction A of the liquid crystal are in the forward direction, so that the liquid crystal easily enters and no bubbles are generated.
【０００７】[0007]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。図１は、ラビング方向を示す平面図、図６は、液
晶注入方向とラビング方向を示す要部断面図である。本
発明の製造方法によって得られるＬＣＤの基本的断面構
造は、図３に示す一般のＬＣＤ構造と同一であるので以
下の説明は図３も参照することとする。本発明によれ
ば、基板（１）、（２）上にそれぞれＩＴＯからなる透
明電極（３）、（４）及びポリイミド樹脂からなる配向
膜（５）、（６）を形成した後、配向膜（５）、（６）
に対し液晶注入口（１０）側からラビングを行う。図１
に示すように液晶注入口（１０）を左側に位置させた場
合、基板（１）側の配向膜（５）に対するラビング方向
Ｒは、右上がり３０゜の角度で、また基板（２）側の配
向膜（６）に対するラビング方向Ｒは、右下がり３０゜
の角度で行い、液晶のねじれ角を２４０゜に設定する。
なお、ラビング方向Ｒが、右上がり３０゜の角度又は右
下がり３０゜の角度になるのは、後述の液晶注入の流れ
方向とほぼ一致させるためである。次いで、基板
（１）、（２）をエポキシ樹脂あるいはＵＶ（紫外線）
硬化型樹脂からなるシール材（９）により貼合わせ、液
晶注入口（１０）から真空注入法により液晶を注入した
後、ＵＶ硬化型樹脂からなる封止材（図示せず）を液晶
注入口（１０）に塗布・硬化させて液晶（１１）を封止
する。液晶の注入に際して、液晶注入の流れ方向Ａは、
液晶注入口（１０）前面に設けた壁（１１）により、液
晶が壁（１１）に衝突して２方向に分流し、基板の中心
線に対して傾斜するようにする。壁（１１）により、液
晶の急激な注入による気泡の発生を防止している。最後
に基板（１）,（２）の外面に所定の角度に設定された
偏光軸を有する偏光板（７）,（８）を貼付ける。この
ようにして製作されたＬＣＤは、液晶分子（１２）が液
晶注入方向Ａに対して順方向に約５〜７゜傾斜してい
る。６４０×２００ドットのＬＣＤでは、液晶注入時間
は約３０分となり、気泡は、全く発生しなかった。これ
に対し液晶分子（１２）が液晶注入方向Ａと対抗するＬ
ＣＤでは、液晶注入時間が約４０分で、しかも０．１〜
０．２mm径の気泡が数多く発生した。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a rubbing direction, and FIG. 6 is a sectional view of a main part showing a liquid crystal injection direction and a rubbing direction. Since the basic sectional structure of the LCD obtained by the manufacturing method of the present invention is the same as the general LCD structure shown in FIG. 3, the following description will also refer to FIG. According to the present invention, the transparent electrodes (3) and (4) made of ITO and the alignment films (5) and (6) made of polyimide resin are formed on the substrates (1) and (2), respectively. (5), (6)
Is rubbed from the liquid crystal injection port (10) side. FIG.
When the liquid crystal injection port (10) is located on the left side as shown in (1), the rubbing direction R with respect to the alignment film (5) on the substrate (1) side is at an angle of 30 ° rising to the right and on the substrate (2) side. The rubbing direction R with respect to the alignment film (6) is set at an angle of 30 ° to the lower right, and the twist angle of the liquid crystal is set to 240 °.
In addition, the rubbing direction R is an angle of 30 °
The downward angle of 30 ° is due to the flow of liquid crystal injection described later.
This is to make the direction substantially coincide with the direction. Next, the substrates (1) and (2) are made of epoxy resin or UV (ultraviolet light).
After bonding with a sealing material (9) made of a curable resin and injecting a liquid crystal by a vacuum injection method from a liquid crystal filling port (10), a sealing material (not shown) made of a UV curable resin is attached to the liquid crystal filling port ( The liquid crystal (11) is sealed by applying and curing the liquid crystal (10). When the liquid crystal is injected, the flow direction A of the liquid crystal injection is
The liquid (11) provided on the front surface of the liquid crystal injection port (10)
The crystal collides with the wall (11) and shunts in two directions.
Be inclined to the line. Liquid by the wall (11)
The generation of bubbles due to rapid injection of crystals is prevented. Finally, polarizing plates (7) and (8) having a polarizing axis set at a predetermined angle are attached to the outer surfaces of the substrates (1) and (2). In the LCD thus manufactured, the liquid crystal molecules (12) are inclined by about 5 to 7 degrees in the forward direction with respect to the liquid crystal injection direction A. In the 640 × 200 dot LCD, the liquid crystal injection time was about 30 minutes, and no bubbles were generated. On the other hand, when the liquid crystal molecules (12)
In the case of CD, the liquid crystal injection time is about 40 minutes, and 0.1 to
Many bubbles with a diameter of 0.2 mm were generated.
【０００８】尚、実施例では、基板（１），（２）のラ
ビング方向Ｒをそれぞれ３０°の場合で説明したが、こ
の角度は、それぞれ０〜４５°まで設定可能である。要
するに、ラビング方向Ｒが液晶注入方向Ａとほぼ同方向
となるようにすれば良い。In the embodiment, the case where the rubbing directions R of the substrates (1) and (2) are each 30 ° has been described. However, this angle can be set from 0 to 45 °. In short, the rubbing direction R should be substantially the same as the liquid crystal injection direction A.
【０００９】[0009]
【発明の効果】以上のように、本発明によればＬＣＤの
性能及び信頼性を劣化させることなく、液晶セルの気泡
発生を防止できると共に液晶注入時間の短縮を図ること
ができる。As described above, according to the present invention, it is possible to prevent the generation of bubbles in the liquid crystal cell and to shorten the liquid crystal injection time without deteriorating the performance and reliability of the LCD.
【図１】本発明の実施例に係るＬＣＤのラビング方向を
示す平面図。FIG. 1 is a plan view showing a rubbing direction of an LCD according to an embodiment of the present invention.
【図２】従来例に係るＬＣＤのラビング方向を示す平面
図。FIG. 2 is a plan view showing a rubbing direction of an LCD according to a conventional example.
【図３】一般的なＬＣＤの断面図。FIG. 3 is a cross-sectional view of a general LCD.
【図４】ラビング方向と液晶分子の関係を示す要部断面
図。FIG. 4 is an essential part cross-sectional view showing a relationship between a rubbing direction and liquid crystal molecules.
【図５】従来例に係るラビング方向と液晶注入方向の関
係を示す要部断面図。FIG. 5 is a sectional view of a main part showing a relationship between a rubbing direction and a liquid crystal injection direction according to a conventional example.
【図６】本発明に係るラビング方向と液晶注入方向の関
係を示す要部断面図。FIG. 6 is a cross-sectional view of a main part showing a relationship between a rubbing direction and a liquid crystal injection direction according to the present invention.
１，２ 基板 ３，４ 透明電極 ５，６ 配向膜 ９ シ−ル材 １０ 液晶注入口 Ａ 液晶注入方向 Ｒ ラビング方向 1, 2 Substrate 3, 4 Transparent electrode 5, 6 Alignment film 9 Seal material 10 Liquid crystal injection port A Liquid crystal injection direction R Rubbing direction
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) G02F 1/1341 G02F 1/1337 500──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 6 , DB name) G02F 1/1341 G02F 1/1337 500
Claims (1)
その透明電極上に配向膜を設け、前記配向膜をラビング
した後、前記基板を所定の間隙をもってシール材により
貼合わせ、前記間隙に液晶注入口から液晶を注入する液
晶表示素子の製造方法において、前記液晶注入口の前面
に液晶の注入流れ方向を変える壁を設けて液晶の注入流
れ方向を前記基板の中心線に対して傾斜させると共に、
前記ラビングの方向を前記注入流れ方向とほぼ一致させ
るように基板の中心線に対して傾斜させることを特徴と
する液晶表示素子の製造方法。 1. A transparent electrode is provided on the inner surfaces of two substrates, respectively.
A liquid for providing an alignment film on the transparent electrode, rubbing the alignment film, bonding the substrate with a sealing material with a predetermined gap, and injecting liquid crystal into the gap from a liquid crystal injection port.
In the method for manufacturing a crystal display element, a front surface of the liquid crystal injection port is provided.
The liquid crystal injection flow is provided by providing a wall that changes the liquid crystal injection flow direction.
Tilt direction with respect to the center line of the substrate,
Make the rubbing direction substantially coincide with the injection flow direction.
And inclined to the center line of the substrate.
Of manufacturing a liquid crystal display element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3329702A JP2769060B2 (en) | 1991-11-20 | 1991-11-20 | Manufacturing method of liquid crystal display element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3329702A JP2769060B2 (en) | 1991-11-20 | 1991-11-20 | Manufacturing method of liquid crystal display element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05142508A JPH05142508A (en) | 1993-06-11 |
| JP2769060B2 true JP2769060B2 (en) | 1998-06-25 |
Family
ID=18224312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3329702A Expired - Lifetime JP2769060B2 (en) | 1991-11-20 | 1991-11-20 | Manufacturing method of liquid crystal display element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2769060B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7196765B2 (en) | 2003-11-21 | 2007-03-27 | Seiko Epson Corporation | Liquid crystal device and electronic apparatus, and method for fabricating liquid crystal device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007232999A (en) * | 2006-02-28 | 2007-09-13 | Optrex Corp | Liquid crystal display panel |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6134134U (en) * | 1984-07-31 | 1986-03-01 | カシオ計算機株式会社 | liquid crystal device |
| JPS62169325U (en) * | 1986-04-17 | 1987-10-27 | ||
| JPS62247326A (en) * | 1986-04-21 | 1987-10-28 | Canon Inc | Production of ferroelectric liquid crystal element |
| JP2835787B2 (en) * | 1991-03-22 | 1998-12-14 | キヤノン株式会社 | Ferroelectric liquid crystal device |
-
1991
- 1991-11-20 JP JP3329702A patent/JP2769060B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7196765B2 (en) | 2003-11-21 | 2007-03-27 | Seiko Epson Corporation | Liquid crystal device and electronic apparatus, and method for fabricating liquid crystal device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05142508A (en) | 1993-06-11 |
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