JPS63237028A - Injection of liquid crystal having ferroelectricity - Google Patents
Injection of liquid crystal having ferroelectricityInfo
- Publication number
- JPS63237028A JPS63237028A JP7341487A JP7341487A JPS63237028A JP S63237028 A JPS63237028 A JP S63237028A JP 7341487 A JP7341487 A JP 7341487A JP 7341487 A JP7341487 A JP 7341487A JP S63237028 A JPS63237028 A JP S63237028A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- phase
- crystal material
- cell
- temp
- 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 49
- 230000005621 ferroelectricity Effects 0.000 title claims description 5
- 238000002347 injection Methods 0.000 title abstract description 11
- 239000007924 injection Substances 0.000 title abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000007704 transition Effects 0.000 claims abstract description 9
- 239000012071 phase Substances 0.000 claims abstract 8
- 239000007791 liquid phase Substances 0.000 claims abstract 2
- 239000000470 constituent Substances 0.000 claims description 5
- 230000001747 exhibiting effect Effects 0.000 claims description 4
- 210000002858 crystal cell Anatomy 0.000 abstract description 11
- 210000004027 cell Anatomy 0.000 abstract description 9
- 239000000203 mixture Substances 0.000 description 5
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
【発明の詳細な説明】
「発明の利用分野」
本発明は、強誘電性を示す液晶を用いた表示装置の作製
工程中、セル内部に液晶材料を注入する工程に関する事
であり、セル面全体に均一な組成比の液晶材料を注入す
るための方法を提案するにある。Detailed Description of the Invention Field of Application of the Invention The present invention relates to a process of injecting a liquid crystal material into a cell during the manufacturing process of a display device using a liquid crystal exhibiting ferroelectric properties. This paper proposes a method for injecting a liquid crystal material with a uniform composition ratio into a liquid crystal material.
「従来の技術Ｊ
強誘電性を示す液晶材料の多くは、温度範囲によって材
料の状態が異なる特徴をもっている。``Prior Art J'' Many liquid crystal materials exhibiting ferroelectricity have the characteristic that the state of the material differs depending on the temperature range.
例えばそれらは次に示す様な相転移を行なう。For example, they undergo the following phase transition.
Ｃｒｙ相ａ−→３ ＠（：相←→ＳｍＡ相ａ−−−＊
ｌ ｓｏ相液晶単体でこの様な特性を持っているだけで
なく、複数種類の混合材料においても移転温度は単体の
際とは若干具なるが、全体としては類似の相転移を示す
。Cry phase a-→3 @(: phase←→SmA phase a---*
Not only a single lso phase liquid crystal has such characteristics, but also a mixture of multiple types of materials exhibits a similar phase transition as a whole, although the transition temperature is slightly different from that of a single material.
又、各相における材料の粘度も異なり、それを利用した
液晶注入方法も公知になっている。Furthermore, the viscosity of the materials in each phase is different, and liquid crystal injection methods that utilize this are also known.
（特願昭６０−１７５１９２ ）
「発明が解決しようとする問題点Ｊ
しかしながら、複数種類よりなる混合液晶材料は全体と
しては複合特性を示しながらも、単体時とは異なりその
転移温度にある種の幅を持ち、不明確であることがわか
った。この温度幅は、構成分子が複数種であることに起
因し、任意の温度に対し、ある材料はＩｓｏ相であるに
もかかわらず他の材料はＳｍＡ相をとり、相の混合が起
きているためであることがわかった。(Patent Application No. 60-175192) ``Problem to be Solved by the Invention J However, although a mixed liquid crystal material consisting of multiple types exhibits composite characteristics as a whole, unlike a single substance, there are certain types of liquid crystal materials at their transition temperatures. It was found that the temperature range has a wide range and is unclear.This temperature range is due to the fact that there are multiple types of constituent molecules. It was found that this is due to the SmA phase and phase mixing occurring.
この様な特性を持った液晶材料を各相の持つ粘度差を利
用した注入方法（特願昭６Ｏ−１７５１９２）を用いて
注入すると、低温でＩｓｏ相をとりうる材料が粘度が低
いため先にセル内に注入され、Ｉｓｏ相移転温度が高い
構成材料が注入されにくくなり、液晶セル内において、
液晶材料組成比の異なった表示装置となってしまうこと
がわかった。これは、液晶セル全面的に駆動条件が異な
っていることを意味し、このセルを駆動際に、同じ駆動
法では均一な表示を行なえないことを示していた。When a liquid crystal material with such characteristics is injected using an injection method that utilizes the viscosity difference between each phase (Japanese Patent Application No. 6O-175192), the material that can take the Iso phase at low temperatures has a low viscosity, so it is injected first. Injected into the cell, constituent materials with a high Iso phase transition temperature become difficult to inject, and in the liquid crystal cell,
It has been found that the result is a display device with a different composition ratio of liquid crystal materials. This means that the driving conditions for the liquid crystal cells are different across the entire surface, indicating that uniform display cannot be achieved by the same driving method when driving these cells.
ｒ問題解決のための手段Ｊ
かかる問題を解決するため、本発明は液晶セルの注入口
に液晶材料を供給する場合、用いる液晶材料の構成液晶
分子各々のＩｓｏ移転移転温度層も高温度のもの以上の
温度に材料を保ち、かつ注入中は、液晶材料と液晶セル
をその温度以上にすることを特徴としている。Means for Solving the Problem J In order to solve this problem, the present invention provides that when a liquid crystal material is supplied to the injection port of a liquid crystal cell, the Iso transition temperature layer of each constituent liquid crystal molecule of the liquid crystal material used is also at a high temperature. It is characterized by keeping the material at a temperature above that temperature, and keeping the liquid crystal material and liquid crystal cell above that temperature during injection.
これによって、供給する液晶材料は、その構成材料金て
がＩｓｏ相になっていることになり、液晶セルには面的
に均一な組成比の液晶材料で満たされることになる。As a result, the supplied liquid crystal material has an Iso phase as its constituent material, and the liquid crystal cell is filled with the liquid crystal material having a uniform composition ratio over the surface.
以下実施例に従って本発明の説明を加える。The present invention will be explained below according to Examples.
「実施例」
第１図は本発明の注入方法を行なう装置の概要図である
液晶セル〔１〕はヒーター〔２〕によって加熱され、か
つ外付の排気系によって真空槽〔３〕もろとも真空に引
く、本実施例ではｌＸｌ０−’Ｔｏｒｒまで真空引きを
行なった。その後、液晶留めを有するディスペンサー〔
４〕より強誘電性を示す液晶をセルの注入口に供給した
。その際、液晶材料はヒーター〔５〕及び〔６〕によっ
て加熱され、全体がＩｓｏ相になっている。"Example" Figure 1 is a schematic diagram of an apparatus for carrying out the injection method of the present invention.A liquid crystal cell [1] is heated by a heater [2], and a vacuum chamber [3] and a vacuum chamber are evacuated by an external exhaust system. In this example, the vacuum was drawn to 1X10-'Torr. After that, a dispenser with a liquid crystal clasp [
4] A liquid crystal exhibiting more ferroelectricity was supplied to the injection port of the cell. At this time, the liquid crystal material is heated by heaters [5] and [6], and the entire liquid crystal material is in the Iso phase.
その後、真空槽内にＮＺを２０５ＣＣＨの流量で供給し
、圧力差によりセル内に液晶を注入した。Thereafter, NZ was supplied into the vacuum chamber at a flow rate of 205 CCH, and liquid crystal was injected into the cell due to the pressure difference.
注入中、ヒーター〔ミ〕によって、セルが加熱されるこ
とで液晶材料はＩｓｏ相を示し、セル面全体に均一な組
成比の材料を注入することができた。During the injection, the cell was heated by the heater [Mi], so that the liquid crystal material exhibited an Iso phase, and the material with a uniform composition ratio could be injected over the entire cell surface.
第１図は、本発明で用いた注入装置の概略を示す。 FIG. 1 schematically shows the injection device used in the present invention.
Claims (1)
性を示す液晶を表示装置内部に注入する工程において、
液晶材料および表示装置用セルを、構成分子の各々が持
つＩｓｏ相（液体相、無秩序相、アイソトロピック相）
への転移温度のうち、最高温度以上の温度を保ちセル内
部へ液晶を注入することを特徴とする強誘電性を示す液
晶の注入方法。In the process of mixing two or more types of liquid crystal molecules and injecting the liquid crystal that exhibits ferroelectricity into the display device,
Iso phase (liquid phase, disordered phase, isotropic phase) that each constituent molecule has in liquid crystal materials and cells for display devices
A method for injecting liquid crystal exhibiting ferroelectricity, which is characterized by injecting liquid crystal into the cell while keeping the temperature above the highest transition temperature.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7341487A JPS63237028A (en) | 1987-03-26 | 1987-03-26 | Injection of liquid crystal having ferroelectricity |
| US07/174,401 US4922972A (en) | 1987-03-26 | 1988-03-25 | Method of filling a liquid crystal device with liquid crystal |
| US07/309,890 US4922974A (en) | 1987-03-26 | 1989-02-14 | Method of filling a liquid crystal device with liquid crystal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7341487A JPS63237028A (en) | 1987-03-26 | 1987-03-26 | Injection of liquid crystal having ferroelectricity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63237028A true JPS63237028A (en) | 1988-10-03 |
Family
ID=13517516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7341487A Pending JPS63237028A (en) | 1987-03-26 | 1987-03-26 | Injection of liquid crystal having ferroelectricity |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63237028A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6021028A (en) * | 1983-07-15 | 1985-02-02 | Canon Inc | Optical modulating element and its production |
| JPS6143724A (en) * | 1984-08-07 | 1986-03-03 | Seiko Instr & Electronics Ltd | Liquid crystal display element |
-
1987
- 1987-03-26 JP JP7341487A patent/JPS63237028A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6021028A (en) * | 1983-07-15 | 1985-02-02 | Canon Inc | Optical modulating element and its production |
| JPS6143724A (en) * | 1984-08-07 | 1986-03-03 | Seiko Instr & Electronics Ltd | Liquid crystal display element |
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