JPH04121707A - Liquid crystal injector - Google Patents
Liquid crystal injectorInfo
- Publication number
- JPH04121707A JPH04121707A JP24199990A JP24199990A JPH04121707A JP H04121707 A JPH04121707 A JP H04121707A JP 24199990 A JP24199990 A JP 24199990A JP 24199990 A JP24199990 A JP 24199990A JP H04121707 A JPH04121707 A JP H04121707A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- injection device
- mixing
- injection
- physical property
- 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 92
- 238000002347 injection Methods 0.000 claims abstract description 38
- 239000007924 injection Substances 0.000 claims abstract description 38
- 238000002156 mixing Methods 0.000 claims abstract description 20
- 210000002858 crystal cell Anatomy 0.000 claims abstract description 5
- 230000000704 physical effect Effects 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 2
- 238000003860 storage Methods 0.000 abstract description 17
- 238000000034 method Methods 0.000 abstract description 13
- 238000011084 recovery Methods 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract description 5
- 239000004988 Nematic liquid crystal Substances 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 4
- 210000004027 cell Anatomy 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は液晶表示素子（以下、ＬＣＤ）を製作する工程
の一部分に使用する液晶注入装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid crystal injection device used in a part of the process of manufacturing a liquid crystal display element (hereinafter referred to as LCD).
［従来の技術］ 一般的な液晶注入工程の概略を第２図に示す。[Conventional technology] FIG. 2 shows an outline of a general liquid crystal injection process.
第２図において、注入すべき液晶２１をトレイ２２に適
当量大れておき、そこにセル内を減圧した液晶セル２３
を浸漬させる事により注入を行っている。In FIG. 2, an appropriate amount of liquid crystal 21 to be injected is placed on a tray 22, and a liquid crystal cell 23 with a reduced pressure inside the cell is placed there.
Injection is performed by immersing the
このような液晶注入工程において従来は、製造するＬＣ
Ｄに要求される電気光学特性に合わせて注入する液晶を
都度、切替えていた。つまり、低電圧で駆動する必要が
あるＬＣＤには誘電異方性が大きい低電圧液晶を、速い
応答速度が必要なしＣＤには低粘性液晶を、広い温度範
囲で動作する事が必要なＬＣＤにはネマチックレンジが
広い液品を使用するといった具合である。Conventionally, in such a liquid crystal injection process, the LC to be manufactured
The liquid crystal to be injected was changed each time according to the electro-optical characteristics required for D. In other words, low-voltage liquid crystals with large dielectric anisotropy are used for LCDs that need to be driven at low voltage, low-viscosity liquid crystals are used for CDs that do not require fast response speed, and low-viscosity liquid crystals are used for LCDs that need to operate over a wide temperature range. For example, a liquid product with a wide nematic range is used.
特に駆動電圧については種々の要求があり、それに対応
して多くの電圧レベルの液晶を用意して、ＬＣＤの機種
によって都度、液晶を切替えなければならない。たとえ
ば３Ｖ１／１６ （デユーティ）−１１５Ｂ （バイア
ス）駆動のＬＣＤの場合はＶｔｈ＝０．７Ｖ程度の低電
圧液晶を使わなければならないし、５■スタテイツク駆
動のＬＣＤの場合はＶｔｈ＝２．７Ｖ程度の高電圧液晶
を使うのが普通である。なお、ｖｔｈとはＬＣＤの閾値
電圧を表わす。このようにＬＣＤの駆動電圧をとっても
、Ｖ’ｔｈ＝０．７Ｖ〜２．７■まで０、ＩＶきざみで
液晶を用意する必要があれば、２１種類にもなってしま
う。実際にはｖｔｈ以外にもΔｎ（複屈折の異方性）、
η（粘度）、ＮＩ（マチック状態と等方性状態の転移温
度）、弾性定数等といった液晶の物性値は多岐にわたり
、その他にも液晶の信頼性や価格も前置すると、大手の
液晶製造メーカーの場合は１００種類以上の液晶を毎月
切替えて使用しているのが現状である。In particular, there are various demands regarding drive voltage, and in response to these demands, it is necessary to prepare liquid crystals with many voltage levels and switch the liquid crystals each time depending on the type of LCD. For example, in the case of a 3V1/16 (duty) - 115B (bias) driven LCD, a low voltage liquid crystal with Vth = about 0.7V must be used, and in the case of a 5■ static drive LCD, Vth = about 2.7V. It is common to use high-voltage liquid crystals. Note that vth represents the threshold voltage of the LCD. Even if the driving voltage of the LCD is determined in this manner, if it is necessary to prepare liquid crystals in 0, IV increments from V'th=0.7V to 2.7V, there will be as many as 21 types. Actually, in addition to vth, Δn (birefringence anisotropy),
Liquid crystals have a wide range of physical properties such as η (viscosity), NI (transition temperature between matic state and isotropic state), elastic constants, etc., and in addition to the reliability and price of liquid crystals, major liquid crystal manufacturers Currently, more than 100 types of liquid crystals are used, switching between them every month.
［発明が解決しようとする課題］
以上述べたように液晶注入工程における液晶の切替えに
は多大のロス時間を伴ない、ＬＣＤの製造コストアップ
に少なからず影響を与えている。[Problems to be Solved by the Invention] As described above, changing the liquid crystal in the liquid crystal injection process involves a large amount of lost time, which has a considerable effect on increasing the manufacturing cost of LCD.
そこで本発明は液晶注入工程における切替え方式を見直
し、新方式による液晶注入装置を導入して従来より合理
的かつ自動化が可能な工程にする事により、ＬＣＤの製
造コストを下げる事を目的とする。Therefore, the present invention aims to reduce the manufacturing cost of LCD by reviewing the switching method in the liquid crystal injection process and introducing a liquid crystal injection device using a new method to make the process more rational and automated than before.
［課題を解決するための手段１
本発明による液晶注入装置は、ある特定の物性値が異な
る複数の液晶を貯蔵する装置と、該液晶を適当な割合で
混合する装置と、該混合液晶を液晶セルに注入する装置
と、注入して残った該混合液晶を回収して貯蔵する装置
とから構成された事を特徴とする。又、液晶の物性値を
検出する装置や本発明の液晶注入装置を自動制御する装
置を付加する事も特徴とする。[Means for Solving the Problems 1] The liquid crystal injection device according to the present invention includes a device for storing a plurality of liquid crystals having different specific physical property values, a device for mixing the liquid crystals in an appropriate ratio, and a device for storing the liquid crystals in a suitable ratio. It is characterized by being comprised of a device for injecting into cells, and a device for collecting and storing the mixed liquid crystal remaining after the injection. Another feature is that a device for detecting physical property values of liquid crystal and a device for automatically controlling the liquid crystal injection device of the present invention are added.
［実 施 例］
第１図は本発明による液晶注入装置の概念図である。本
発明は第１図に示すようにＡ、Ｂ、Ｃ１Ｄ、Ｆの５つの
ブロック及びＥで示す液晶の物性値を検出する装置から
構成されている。以下、５つのブロックの説明をすると
、Ａはある特定の物性値が異なるが他の物性値はほぼ同
一であるような複数の液晶を貯蔵する装置を示し、Ｂは
これらの液晶を適当な割合で混合して所望の物性値を有
する液晶を製造する装置を示し、Ｃは製造した混合液晶
を液晶セルに注入する装置を示し、Ｄは注入して残った
混合液晶を回収して貯蔵する装置を示し、Ｆはこれらの
装置全体を自動制御するための制御装置である。そして
Ｅは液晶の物性値を検出する装置である。[Example] FIG. 1 is a conceptual diagram of a liquid crystal injection device according to the present invention. As shown in FIG. 1, the present invention is comprised of five blocks A, B, C1D, and F, and a device for detecting physical property values of liquid crystals indicated by E. Below, the five blocks are explained. A indicates a device that stores multiple liquid crystals that differ in certain physical property values but are almost the same in other physical properties, and B indicates a device that stores these liquid crystals in an appropriate ratio. C is a device for injecting the produced mixed liquid crystal into a liquid crystal cell, and D is a device for collecting and storing the remaining mixed liquid crystal after injection. , and F is a control device for automatically controlling all of these devices. E is a device for detecting physical property values of liquid crystal.
（実 施 例、１）
第１図において、ｖｔｈ＝１．ＯＶ、Δｎ＝０．１３、
ｙ＋＝３０ｃｐ、ＮＩ＝６５℃の物性値を有するネマチ
ック液晶ｌと、Ｖｔｈ＝２．０■、Δｎ＝０．１３、？
？＝３５Ｃｐ、ＮＩ＝７０℃の物性値を有するネマチッ
ク液晶３を用意し、各々、貯蔵袋Ｎ２と貯蔵装置４に入
れた。２つの貯蔵装置の底にはパイプ（黒い実線）が配
管されており、パイプの一部には液晶の流量をコントロ
ールするバルブ５が設けられている。６は貯蔵装置２と
貯蔵装置４の液晶を適当な割合で混合する装置である。(Example 1) In FIG. 1, vth=1. OV, Δn=0.13,
Nematic liquid crystal l having physical properties of y+=30cp, NI=65°C, Vth=2.0■, Δn=0.13, ?
? Nematic liquid crystals 3 having physical properties of =35Cp and NI =70°C were prepared and placed in a storage bag N2 and a storage device 4, respectively. A pipe (solid black line) is installed at the bottom of the two storage devices, and a valve 5 for controlling the flow rate of liquid crystal is provided in a part of the pipe. 6 is a device for mixing the liquid crystals in storage device 2 and storage device 4 in an appropriate ratio.
６の混合装置には液晶を加熱するためのヒーター７と拡
はんプロペラ８が設けられている。ネマチック液晶１と
ネマチック液晶３の混合比は貯蔵装置２と貯蔵装置４の
バルブを操作して決められる。例えばネマチック液晶ｌ
とネマチック液晶３の混合比を重量で７０・３０にブレ
ンドして混合液晶９を作ると、Ｖｔｈ＝１．３Ｖ、△ｎ
＝０．１３、ｎ＝３２ｃｐ、ＮＩ＝６６．５°Ｃの物性
値が得られた。この混合液晶９は混合装置６の底のパイ
プを通って注入装置１１に導かれる。注入装置１１の詳
細な説明は省略するが概略は前述した第２図の通りであ
る。液晶セルを注入して残った液晶１０は回収装置１２
によって回収され、回収液晶１３となる。又、貯蔵装置
２）貯蔵装置４、混合装置６、注入装置１１．回収装置
１２には液晶の物性値を測定するための検出装置ｌ４が
設けられている。検出データは制御装置１５に送られて
処理され、本発明による液晶注入装置を運転するうえで
利用される。なお、回収装置１２に回収された回収液晶
１３は次回以降の注入に再利用できる。例えば回収液晶
１３の物性値を検出装置１４で検査して、Ｖｔｈ＝１．
３Ｖ、Δｎ＝０．１３、？？＝３２ｃｐ、ＮＩ＝６６．
５℃であり、次回に注入する液晶の仕様がｖｔｈ＝１．
５■である場合は、回収液晶１３とネマチック液晶３の
混合比を重量で２８ ： ７２の割合で混合装置６でブ
レンドすればよい。なお、この場合の混合液晶の物性値
はＶｔｈ＝１．５Ｖ、Δｎ：０．１３、η＝３３ｃｐ、
ＮＩ＝６７．５℃となる。The mixing device 6 is provided with a heater 7 and a spreading propeller 8 for heating the liquid crystal. The mixing ratio of nematic liquid crystal 1 and nematic liquid crystal 3 is determined by operating the valves of storage device 2 and storage device 4. For example, nematic liquid crystal
When a mixed liquid crystal 9 is made by blending the mixture ratio of nematic liquid crystal 3 and nematic liquid crystal 3 to 70.30 by weight, Vth=1.3V, △n
Physical property values of =0.13, n=32cp, and NI=66.5°C were obtained. This mixed liquid crystal 9 is led to the injection device 11 through a pipe at the bottom of the mixing device 6. A detailed explanation of the injection device 11 will be omitted, but its outline is as shown in FIG. 2 described above. The remaining liquid crystal 10 after injecting the liquid crystal cell is collected by a recovery device 12
The liquid crystals are recovered and become recovered liquid crystals 13. Also, storage device 2) storage device 4, mixing device 6, injection device 11. The recovery device 12 is provided with a detection device l4 for measuring physical property values of the liquid crystal. The detected data is sent to the control device 15 for processing and is used to operate the liquid crystal injection device according to the invention. Note that the recovered liquid crystal 13 recovered by the recovery device 12 can be reused for subsequent injections. For example, the physical property values of the recovered liquid crystal 13 are inspected by the detection device 14, and Vth=1.
3V, Δn=0.13,? ? =32cp, NI=66.
The temperature is 5°C, and the specifications of the liquid crystal to be injected next time are vth=1.
5■, the recovered liquid crystal 13 and the nematic liquid crystal 3 may be blended in the mixer 6 at a mixing ratio of 28:72 by weight. In addition, the physical properties of the mixed liquid crystal in this case are Vth = 1.5V, Δn: 0.13, η = 33cp,
NI=67.5°C.
（実 施 例、２）
第１図において、Δｎ＝０．１０、ｖｔｈ＝１．３ｖ、
ｒ＋＝２８ｃｐ、ＮＩ＝７０℃の物性値を有するネマチ
ック液晶１とΔｎ＝０．１５、■ｔｈ＝１．３Ｖ、？？
＝３８ＣＰ、ＮＩ＝７２℃の物性値を有するネマチック
液晶３を用意し、各々、貯蔵装置２と貯蔵装置４に入れ
た。Δｎ＝０１０のネマチック液晶１のみを使用する場
合は貯蔵装置２に付属するバルブ５を操作して必要量を
注入装置１１に供給すればよいが、この場合は他の液晶
とのブレンドは必要ないので混合装置６は単に経由させ
るだけでよい。次にΔｎ＝０゜１２の液晶が必要な場合
は混合装置６でネマチック液晶１とネマチック液晶３の
混合比を重量で６０：４０にブレンドすればよく、この
場合の混合液晶９の物性値はΔｎ＝０．１２）Ｖｔｈ＝
１３■、ｒ）＝３４ｃｐ、ＮＩ＝７０．８℃になる。(Example 2) In Fig. 1, Δn=0.10, vth=1.3v,
Nematic liquid crystal 1 having physical properties of r+=28cp, NI=70°C, Δn=0.15, ■th=1.3V, ? ?
Nematic liquid crystals 3 having physical property values of =38CP and NI=72°C were prepared and placed in storage device 2 and storage device 4, respectively. When using only the nematic liquid crystal 1 with Δn=010, the necessary amount can be supplied to the injection device 11 by operating the valve 5 attached to the storage device 2, but in this case, blending with other liquid crystals is not necessary. Therefore, it is sufficient to simply pass through the mixing device 6. Next, if a liquid crystal with Δn=0°12 is required, it is sufficient to blend nematic liquid crystal 1 and nematic liquid crystal 3 at a mixing ratio of 60:40 by weight using the mixing device 6. In this case, the physical properties of the mixed liquid crystal 9 are Δn=0.12)Vth=
13■, r) = 34 cp, NI = 70.8°C.
（実 施 例、３）
本発明による液晶注入装置で使用する液晶として、ある
特定の物性値のみが異なり、他の物性値はほぼ同一であ
るような液晶の具体例を表、１に示す、なお、本実施例
の場合のある特定の物性としてはｖｔｈであり、低電圧
側のネマチック液晶Ａと高電圧側のネマチック液晶Ｂを
適当な割合でブレンドすれば、Ｖｔｈ＝１．２Ｖ−Ｖｔ
ｈ＝１．７Ｖの範囲で任意のｖｔｈを有しΔｎ＝０゜１
５、
ＮＩ＞８０℃のネマチック液晶を作る事ができ、
本発明による液晶注入装置に使用する事ができる。(Example 3) Table 1 shows specific examples of liquid crystals used in the liquid crystal injection device according to the present invention, which differ only in certain physical property values and are almost the same in other physical property values. Note that the specific physical property in this example is vth, and if nematic liquid crystal A on the low voltage side and nematic liquid crystal B on the high voltage side are blended in an appropriate ratio, Vth = 1.2V-Vt.
Have any vth in the range of h=1.7V and Δn=0゜1
5. Nematic liquid crystals with NI>80°C can be produced and used in the liquid crystal injection device according to the present invention.
（表１）
Ｒ及びＲ゛はＣｎＨｚ ｎ＋＋ （ｎは正の整数）を
示す。(Table 1) R and R' represent CnHz n++ (n is a positive integer).
［発明の効果］
以上述べたように本発明によれば、従来液晶の物性値が
異なるごとに液晶を用意して注入工程で切替えていたの
が、ある特定の物性値のみが異なり他の物性値はほぼ同
一であるような液晶を使用して注入する直前に希望する
物性値にブレンドする事によって、注入工程を大幅に合
理化できるという効果がある。従って、ＬＣＤの製造コ
ストを低減できる。[Effects of the Invention] As described above, according to the present invention, conventionally liquid crystals were prepared for different physical property values and switched during the injection process, but when only a certain physical property value differs and other physical properties By using liquid crystals whose values are almost the same and blending them to desired physical properties immediately before injection, the injection process can be greatly streamlined. Therefore, the manufacturing cost of LCD can be reduced.
【図面の簡単な説明】 第１図は本発明による液晶注入装置の概念図。 第２図は一般的な液晶注入装置工程の概略を示す図。 １．３・・ネマチック液晶 ２） ・貯蔵装置 ５ ・ ・バルブ 混合装置 ・ヒータ ・拡はんプロペラ ・混合液晶 注入液晶 注入装置 ・回収装置 ・回収液晶 ・検出装置 ・制御装置 ・液晶 ・トレイ セル[Brief explanation of drawings] FIG. 1 is a conceptual diagram of a liquid crystal injection device according to the present invention. FIG. 2 is a diagram showing an outline of the process of a general liquid crystal injection device. 1.3... Nematic liquid crystal 2) ・Storage equipment 5・ ·valve mixing device ·heater ・Spreading propeller ・Mixed liquid crystal injection lcd injection device ・Collection device ・Recovered LCD ・Detection device ·Control device ·liquid crystal ·tray cell
Claims (3)
装置と、該液晶を適当な割合で混合する装置と、該混合
液晶を液晶セルに注入する装置と、注入して残った該混
合液晶を回収して貯蔵する装置とから精成された事を特
徴とする液晶注入装置。(1) A device for storing a plurality of liquid crystals having different specific physical properties, a device for mixing the liquid crystals in an appropriate ratio, a device for injecting the mixed liquid crystal into a liquid crystal cell, and the mixture remaining after injection. A liquid crystal injection device characterized by being refined from a device for collecting and storing liquid crystal.
なくとも液晶の物性値を検出する装置と、前記液晶注入
装置の運転を制御する装置とを付加した事を特徴とする
液晶注入装置。(2) A liquid crystal injection device characterized by adding at least a device for detecting physical property values of liquid crystal and a device for controlling the operation of the liquid crystal injection device to the liquid crystal injection device according to claim 1. .
入装置に使用する液晶として、ある特定の物性値のみが
異なり、他の物性値はほぼ同一であるような液晶を使用
した事を特徴とする液晶注入装置。(3) The liquid crystal used in the liquid crystal injection device according to claim 1 or 2 is a liquid crystal that differs only in certain physical property values and has almost the same other physical property values. A liquid crystal injection device featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24199990A JPH04121707A (en) | 1990-09-12 | 1990-09-12 | Liquid crystal injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24199990A JPH04121707A (en) | 1990-09-12 | 1990-09-12 | Liquid crystal injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04121707A true JPH04121707A (en) | 1992-04-22 |
Family
ID=17082750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24199990A Pending JPH04121707A (en) | 1990-09-12 | 1990-09-12 | Liquid crystal injector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04121707A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7001575B2 (en) | 2000-08-12 | 2006-02-21 | Nucellsys Gmbh | Device for feeding educts to parallel spaces |
-
1990
- 1990-09-12 JP JP24199990A patent/JPH04121707A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7001575B2 (en) | 2000-08-12 | 2006-02-21 | Nucellsys Gmbh | Device for feeding educts to parallel spaces |
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