JPH0356455B2 - - Google Patents
Info
- Publication number
- JPH0356455B2 JPH0356455B2 JP58020743A JP2074383A JPH0356455B2 JP H0356455 B2 JPH0356455 B2 JP H0356455B2 JP 58020743 A JP58020743 A JP 58020743A JP 2074383 A JP2074383 A JP 2074383A JP H0356455 B2 JPH0356455 B2 JP H0356455B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- temperature
- crystal panel
- vacuum
- boiling point
- 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
- 239000004973 liquid crystal related substance Substances 0.000 claims description 73
- 238000009835 boiling Methods 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 description 5
- RPHMFCDGSSKPKI-UHFFFAOYSA-N cyclohexane;phenol Chemical compound C1CCCCC1.OC1=CC=CC=C1 RPHMFCDGSSKPKI-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1341—Filling or closing of cells
Description
【発明の詳細な説明】
産業上の利用分野
この発明は液晶表示装置の製造方法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a method of manufacturing a liquid crystal display device.
従来例の構成とその問題点
液晶注入工程は、液晶パネル内に液晶を確実に
入れるということから、液晶と液晶パネルを挿入
した槽を真空にして行なう。この場合、注入時の
粘度、注入後の配向の問題から、注入時の温度は
液晶の転移温度（To―i）より高くなるように設
定する必要がある。そのため、従来は、液晶パネ
ルを加熱したり、液晶溜めを加熱したりして、液
晶を転移温度（To―i）以上の温度に上昇させ、
その状態で液晶パネルの注入口を液晶に接して、
槽内の真空をリークすることにより、液晶パネル
内に液晶を注入していた。Conventional Structure and Problems The liquid crystal injection process is performed by evacuating the tank into which the liquid crystal and liquid crystal panel are inserted, in order to ensure that the liquid crystal is inserted into the liquid crystal panel. In this case, due to the problems of viscosity during injection and orientation after injection, the temperature during injection must be set higher than the transition temperature (T o - i ) of the liquid crystal. Therefore, in the past, the liquid crystal was heated to a temperature above its transition temperature (T o - i ) by heating the liquid crystal panel or heating the liquid crystal reservoir.
In that state, touch the injection port of the liquid crystal panel to the liquid crystal,
Liquid crystal was injected into the liquid crystal panel by leaking the vacuum inside the tank.
しかしながら、このような方法では、液晶に含
まれている低沸点の組成物のために、転移温度
（To―i）以上の温度を得ようと思えば真空度に限
界があり、また、真空度をある程度以下に設定す
ると温度に限界があり、時として転移温度
（To―i）以上の温度を確保することができないと
いう欠点を有しており、確実な注入方法を得るこ
とが困難であった。 However, with this method, there is a limit to the degree of vacuum required to obtain a temperature above the transition temperature (T o - i ) due to the low boiling point composition contained in the liquid crystal. If the temperature is set below a certain level, there is a limit to the temperature, and it is sometimes impossible to secure a temperature above the transition temperature (T o - i ), which makes it difficult to obtain a reliable injection method. there were.
発明の目的
この発明の目的は、液晶を液晶パネル内へ確実
に注入できる液晶表示装置の製造方法を提供する
ことである。OBJECT OF THE INVENTION An object of the present invention is to provide a method for manufacturing a liquid crystal display device that can reliably inject liquid crystal into a liquid crystal panel.
発明の構成
この発明の液晶表示装置の製造方法は、液晶溜
めを低沸点の材料の沸点以下の温度に保ちなが
ら、液晶パネルのみを液晶の転移温度以上に加熱
して液晶注入を行なうことにより、液晶を液晶パ
ネル内へ確実に注入できるようにしたものであ
る。Composition of the Invention The method for manufacturing a liquid crystal display device of the present invention involves injecting liquid crystal by heating only the liquid crystal panel to a temperature higher than the transition temperature of the liquid crystal while maintaining the liquid crystal reservoir at a temperature lower than the boiling point of a material with a low boiling point. This allows liquid crystal to be reliably injected into the liquid crystal panel.
実施例の説明
この発明の一実施例を第１図および第２図を用
いて説明する。すなわち、この液晶表示装置の製
造方法は、真空ポンプ１ａで槽２内を真空にし、
ある真空度で液晶パネル１ｂの注入口を液晶溜め
１ｃ内の液晶１ｄに接し、その後槽２内の真空を
リークして液晶パネル１ｂ内に液晶１ｄを注入す
る。この場合、液晶溜め１ｃを温水循環、空冷な
どの方法で、ある温度以下に保つような構造とす
る。例えば、液晶にPCH（フエノールシクロヘキ
サン）系を添加し、液晶の粘度を調整することが
行なわれるが、PCH系の材料の沸点は約50℃〜
70℃であり、この温度以下に液晶を保つようにし
なければ、液晶の粘度が変化し、電圧が上昇して
コントラストが低下してしまう。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 and 2. That is, in this method of manufacturing a liquid crystal display device, the inside of the tank 2 is evacuated using the vacuum pump 1a,
The injection port of the liquid crystal panel 1b is brought into contact with the liquid crystal 1d in the liquid crystal reservoir 1c under a certain degree of vacuum, and then the vacuum in the tank 2 is leaked to inject the liquid crystal 1d into the liquid crystal panel 1b. In this case, the structure is such that the liquid crystal reservoir 1c is maintained at a certain temperature or lower by hot water circulation, air cooling, or the like. For example, PCH (phenol cyclohexane) is added to liquid crystal to adjust the viscosity of the liquid crystal, but the boiling point of PCH-based materials is approximately 50℃~
The temperature is 70°C, and unless the liquid crystal is kept below this temperature, the viscosity of the liquid crystal will change, the voltage will increase, and the contrast will decrease.
また、液晶パネル１ｂはあらかじめ予熱をして
槽２内に入れてもよいし、あるいは槽２内にヒー
タを具備して槽２内で液晶パネル１ｂの加熱を行
なつてもよい。また、これら加熱方法を併用して
も構わない。この場合、液晶パネル１ｂは液晶の
転移温度以上、例えば約90℃〜100℃以上に加熱
することが必要である。 Further, the liquid crystal panel 1b may be preheated beforehand and placed in the tank 2, or a heater may be provided in the tank 2 and the liquid crystal panel 1b may be heated within the tank 2. Further, these heating methods may be used in combination. In this case, it is necessary to heat the liquid crystal panel 1b to a temperature higher than the transition temperature of the liquid crystal, for example, about 90° C. to 100° C. or higher.
その作用を説明するとつぎのとおりである。す
なわち、液晶組成物には、その種類により、上述
のように低沸点の物質が含まれているものがあ
る。そのため、液晶注入時の真空度と温度が互い
に相関関係をもちながら制約をうける。例えば、
真空度をある一定値とすると、温度はある値以下
に制限される（第２図でＡの真空度とすると、温
度はＢ以下となる）。また、温度としてある一定
値をとると、真空度が制限される（第２図でＢの
温度とすると、真空度はＡまで）。したがつて、
時として、液晶注入時に充分な真空度が得られな
かつたり、液晶の転移温度（To―i）点以上の温
度を得られなかつたりで、安定で確実な注入方法
が得られないことがある。 The effect is explained as follows. That is, depending on the type of liquid crystal composition, some liquid crystal compositions contain a substance with a low boiling point as described above. Therefore, the degree of vacuum and temperature at the time of liquid crystal injection are limited while having a correlation with each other. for example,
When the degree of vacuum is set to a certain value, the temperature is limited to a certain value or less (if the degree of vacuum is A in FIG. 2, the temperature is below B). Further, when the temperature takes a certain value, the degree of vacuum is limited (if the temperature is B in FIG. 2, the degree of vacuum is up to A). Therefore,
Sometimes, it is not possible to obtain a sufficient degree of vacuum when injecting liquid crystals, or it is not possible to obtain a temperature above the transition temperature (T o - i ) of liquid crystals, making it impossible to obtain a stable and reliable injection method. .
そこで、真空度をＡとすると、液晶１ｄの温度
がＢ以下、例えばPCH系材料を用いている場合
は50℃〜70℃以下になるように液晶溜め１ｃを保
温し、真空度を得られるようにする。つぎに、液
晶１ｄが真空リーク時に転移温度（To―i）以上
で注入されるよう、液晶パネル１ｂのみを加熱し
て、液晶１ｄを注入する。このような方法をとる
ことにより、転移温度（To―i）以上の温度で液
晶１ｄを注入でき、その注入に必要な真空度も得
られて、液晶１ｄを液晶パネル１ｂ内へ確実に注
入できる。しかも、液晶組成物中の低沸点材料が
変化し、液晶の特性、特にコントラストの低下が
生じることもない。 Therefore, if the degree of vacuum is A, the temperature of the liquid crystal reservoir 1c is kept so that the temperature of the liquid crystal 1d is below B, for example, 50 to 70 degrees Celsius when PCH-based material is used, so that the degree of vacuum can be obtained. Make it. Next, only the liquid crystal panel 1b is heated and the liquid crystal 1d is injected so that the liquid crystal 1d is injected at a temperature higher than the transition temperature (T o - i ) at the time of vacuum leakage. By adopting such a method, the liquid crystal 1d can be injected at a temperature higher than the transition temperature (T o - i ), the degree of vacuum necessary for the injection can be obtained, and the liquid crystal 1d can be reliably injected into the liquid crystal panel 1b. can. Moreover, the low boiling point material in the liquid crystal composition does not change and the characteristics of the liquid crystal, especially the contrast, do not deteriorate.
発明の効果
この発明の液晶表示装置の製造方法によれば、
液晶の特性が劣化することなく、液晶パネル内へ
確実に注入できるという効果がある。Effects of the Invention According to the method for manufacturing a liquid crystal display device of the present invention,
The effect is that it can be reliably injected into the liquid crystal panel without deteriorating the characteristics of the liquid crystal.
第１図はこの発明の一実施例の説明図、第２図
は液晶低沸点物質の沸点温度と真空度の関係特性
図である。
１ｂ……液晶パネル、１ｃ……液晶溜め、１ｄ
……液晶。
FIG. 1 is an explanatory diagram of an embodiment of the present invention, and FIG. 2 is a characteristic diagram showing the relationship between the boiling point temperature of a liquid crystal low boiling point substance and the degree of vacuum. 1b...Liquid crystal panel, 1c...Liquid crystal reservoir, 1d
……liquid crystal.
Claims (1)
液晶が未注入の液晶パネルとを真空領域に配置す
る工程と、液晶溜めを前記低沸点の材料の沸点以
下の温度に保つと共に液晶パネルを液晶の転移温
度以上に加熱する工程と、液晶パネルの注入口を
液晶に接する工程と、液晶パネルの外気圧を上昇
する工程とを含む液晶表示装置の製造方法。1. A step of placing a liquid crystal reservoir containing liquid crystal containing a low boiling point material and a liquid crystal panel in which no liquid crystal has been injected in a vacuum area, and maintaining the liquid crystal reservoir at a temperature below the boiling point of the low boiling point material and removing the liquid crystal panel. A method for manufacturing a liquid crystal display device, which includes the steps of heating the liquid crystal to a temperature higher than its transition temperature, bringing an injection port of the liquid crystal panel into contact with the liquid crystal, and increasing the external pressure of the liquid crystal panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2074383A JPS59147324A (en) | 1983-02-10 | 1983-02-10 | Manufacture of liquid-crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2074383A JPS59147324A (en) | 1983-02-10 | 1983-02-10 | Manufacture of liquid-crystal display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59147324A JPS59147324A (en) | 1984-08-23 |
| JPH0356455B2 true JPH0356455B2 (en) | 1991-08-28 |
Family
ID=12035668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2074383A Granted JPS59147324A (en) | 1983-02-10 | 1983-02-10 | Manufacture of liquid-crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59147324A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2316756A (en) * | 1996-08-30 | 1998-03-04 | Lg Electronics Inc | Filling a liquid crystal panel |
| KR100499583B1 (en) | 1999-11-17 | 2005-07-07 | 엘지.필립스 엘시디 주식회사 | liquid crystal injection device and liquid crystal injection method |
| US7244627B2 (en) | 2003-08-25 | 2007-07-17 | Lg.Philips Lcd Co., Ltd. | Method for fabricating liquid crystal display device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4979541A (en) * | 1972-12-04 | 1974-08-01 |
-
1983
- 1983-02-10 JP JP2074383A patent/JPS59147324A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4979541A (en) * | 1972-12-04 | 1974-08-01 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59147324A (en) | 1984-08-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6011609A (en) | Method of manufacturing LCD by dropping liquid crystals on a substrate and then pressing the substrates | |
| US5548428A (en) | Process for injecting ferroelectric liquid crystal with injection completed above atmospheric pressure | |
| JPH0356455B2 (en) | ||
| KR970004605B1 (en) | Method of injecting ferroelectric liquid crystal | |
| JP2571926B2 (en) | Injection and sealing method of smectic liquid crystal | |
| US5417257A (en) | Method and apparatus for injecting liquid crystal | |
| US5546998A (en) | Apparatus for vacuum injecting liquid crystal | |
| JP2641370B2 (en) | Manufacturing method of liquid crystal display device | |
| KR0151404B1 (en) | Injector and injection method of liquid crystal | |
| JPS6395418A (en) | Method for sealing smectic liquid crystal | |
| JP3364157B2 (en) | Liquid crystal panel manufacturing method | |
| KR0184563B1 (en) | Apparatus for liquid crystal injection and its method | |
| JPS62231213A (en) | Method for injecting liquid crystal into liquid crystal cell | |
| JPS6473320A (en) | Manufacture of liquid crystal display panel | |
| JP2868132B2 (en) | Method for manufacturing color liquid crystal display element | |
| JPH10104562A (en) | Production of liquid crystal display and apparatus for production | |
| JPS63256922A (en) | Manufacture of liquid crystal cell | |
| JPH07128673A (en) | Liquid crystal injecting method and liquid crystal injecting device | |
| JPS61132928A (en) | Method for injecting smectic c* liquid crystal cell | |
| JPS634216A (en) | Manufacture of liquid crystal element | |
| JPH0651258A (en) | Method for injecting ferroelectric liquid crystal | |
| JPH05173152A (en) | Liquid crystal cell | |
| JP2893069B2 (en) | Liquid crystal element | |
| JP3159456B2 (en) | Method for manufacturing color liquid crystal display element | |
| JPS5754919A (en) | Liquid crystal element |