JPS62169121A - Ferroelectric liquid crystal display - Google Patents

Ferroelectric liquid crystal display

Info

Publication number
JPS62169121A
JPS62169121A JP1045286A JP1045286A JPS62169121A JP S62169121 A JPS62169121 A JP S62169121A JP 1045286 A JP1045286 A JP 1045286A JP 1045286 A JP1045286 A JP 1045286A JP S62169121 A JPS62169121 A JP S62169121A
Authority
JP
Japan
Prior art keywords
liquid crystal
substrate
deterioration
ferroelectric liquid
crystal display
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
Application number
JP1045286A
Other languages
Japanese (ja)
Inventor
Hidekazu Kobayashi
英和 小林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Epson Corp
Original Assignee
Seiko Epson Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP1045286A priority Critical patent/JPS62169121A/en
Publication of JPS62169121A publication Critical patent/JPS62169121A/en
Pending legal-status Critical Current

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  • Liquid Crystal (AREA)

Abstract

PURPOSE:To inhibit deterioration in contrast caused by the twist structure characteristic to a ferroelectric liquid crystal, to retard also occurrence of discrimination, and to improve the storage characteristic of a ferroelectric liquid crystal display by changing orientation treatment of two liquid crystal inserting substrates. CONSTITUTION:SiO2 is obliquely vapor-deposited with 40-85 deg. angle to a liquid crystal inserting substrate 3 at one side and an orienting agent such as PVA is coated on another substrate 4 and rubbed. By this constitution, dipoles at the PVA-treated side are directed toward the inside of a cell, but directed toward substrate at the SiO2-treated side. Thus, the dipoles are distributed in the range from upper substrate to lower substrate being oriented in one direction, so the deterioration of contrast in the storage state, deterioration of storage characteristic due to discrimination caused by twist, and deterioration of threshold characteristic are retarded.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は強誘電性液晶表示装置の液晶挾持基板の構造に
関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a liquid crystal holding substrate of a ferroelectric liquid crystal display device.

〔発明の社要〕[Summary of the invention]

本発明は強誘電性液晶表示装置flにおいて2枚の液晶
挾持基板の配向膜J[−違えることにより、強誘電性液
晶特有のツイスト構造によるコントラストノ劣化、支び
ディスクリネーションの発生?おさえ、メモリー性も向
上させtものである。
In the present invention, in a ferroelectric liquid crystal display device fl, by changing the alignment film J of two liquid crystal holding substrates, deterioration of contrast, propagation, and disclination occur due to the twisted structure peculiar to ferroelectric liquid crystal. It also improves memory performance.

〔従来の技術〕[Conventional technology]

従来の強誘電性液晶表示vAtftの液晶挾持基板の構
造は、液晶シ一方向にν向させる之め乙配向剤を塗布し
ラビングするか、もろいは液晶?封入しt後に磁場など
を加えて配向させるため表面無処理であり友。
The structure of the liquid crystal holding substrate of the conventional ferroelectric liquid crystal display (vAtft) is to orient the liquid crystal in one direction by applying an alignment agent and rubbing it, or is the liquid crystal brittle? After encapsulation, a magnetic field is applied to orient the particles, so no surface treatment is required.

〔発明ht解決しよ5とする問題点〕 しかし前述の従来技術では、強誘電性液晶特有のメモリ
ー状袷(駆動電圧を切りt後も分子方向が変らない)で
のツイストhZ考慮されていない。
[Problems to be solved by invention 5] However, the above-mentioned conventional technology does not take into account the twist hZ in the memory state (the molecular direction does not change even after the driving voltage is cut off), which is unique to ferroelectric liquid crystals. .

ここでツイストとは第5図で示したよ5に、液晶挟持基
板表面での強誘電性液晶のもつ双極子hi 。
Here, the twist refers to the dipole hi of the ferroelectric liquid crystal on the surface of the liquid crystal sandwiching substrate, as shown in FIG.

上下の板において対称な方向な向こ5とするtめにかこ
ろものである。ツイスト構造生じると、分子ノモつ光学
異方性h=そろわない念めに、コントラストノ劣化ちる
。ま之1分子ht一方向?向かない之めディスクリネー
シッン(欠陥)カ生じ、その次ぬし欠い値特性の劣化、
メモリー性の劣化が生じる。そこで末完明けこのよ5な
間閂腐シ解決するもので、その目的とオろところは、こ
うしt問題?引きおこす原図であるツイストシおこさな
い配向手段シ提供するところにちる。
The upper and lower plates are placed in the 5th direction in a symmetrical direction. When a twisted structure occurs, the optical anisotropy h of the molecules does not match, and the contrast deteriorates. One molecule ht one direction? Due to unsuitable conditions, discrepancy (defects) occur, and the subsequent deterioration of missing value characteristics.
Deterioration of memory performance occurs. So, the goal is to solve this 5-year-old problem, and what is its purpose and origin? The present invention provides an orientation means that does not cause twisting, which is the original drawing.

〔間¥11シ解決する之めの手段〕 本発明の仲誘成性液晶表示装置は片側の液晶挾持板rs
io□なa Oo〜85°で斜方蒸着し、も5一方の基
板にけPVAなどの配向剤を塗布し、ラビングしたこと
を特徴とする。EJi 0.40°以下の斜方蒸着では
、PVA処理基板を相手とする場合効果ht無くなる。
[Means for solving the problem of 11 yen] The medium-induced liquid crystal display device of the present invention has a liquid crystal holding plate rs on one side.
It is characterized in that it is obliquely evaporated at an angle of 85 degrees, and an alignment agent such as PVA is applied to one of the substrates, followed by rubbing. In oblique evaporation with an EJi of 0.40° or less, the effect ht is lost when a PVA-treated substrate is used.

〔作用〕[Effect]

本発明の上記の構成によればPVAILfW’4t、た
側ではダイポールはセル内な向き1日i02処即し次側
では基板側な向く(填2図)。その几めダイポールは上
基板から下基板まで一方向?向くことになり、上蓼板と
下基板だ同じ処理を施こした場合(IE 31’l!l
 )と異なりツイストが生じない。この効果により、メ
モリー状態でのコントラストの劣化。
According to the above configuration of the present invention, the dipole is oriented toward the inside of the cell on the first side of PVAILfW'4t, and is oriented toward the substrate on the next side (see Figure 2). Is that refined dipole unidirectional from the top board to the bottom board? If you apply the same treatment to the upper and lower boards (IE 31'l!l
), no twist occurs. This effect results in a degradation of contrast in the memory state.

ツイストにより引き起こされるディスクリネーションに
よるメモリー性劣化、しきい値特性の劣化もおさえられ
る。
Memory deterioration and threshold characteristic deterioration due to disclination caused by twisting can also be suppressed.

〔実施例〕〔Example〕

第1図は本発明の実施例に七−ける液晶表示装置の断面
図でちる。ガラス基板上に工TO帽シ形成後、RiCh
を基板垂直方向を00とし、40°〜85°で斜方蒸着
し友もの?用意する。ネた、ITO膿形成後のガラス板
にPVk溶液?塗布後乾燥し、ラビングしt41のを用
意する。ポリエチレンフィルム(4μm厚)なけさ入、
熱圧着する。(セル厚は2〜5 am、 )これにエス
テル系液晶RO−@−C02J5;、−OR”(R=o
oH1o 、 R’ = −cHt−1”H(aHs 
)−U )+入れると、上下基板対称な処理シし次場合
はりaスニコル下でBmO相で黒レベルhZ青く見える
のに、この場合は真黒であり、メモリー性も良好(it
圧?切ってもほとんど光量ht変化しない)であり几。
FIG. 1 is a sectional view of a liquid crystal display device according to a seventh embodiment of the present invention. After forming the TO cap on the glass substrate, RiCh
With the vertical direction of the substrate set to 00, it is obliquely deposited at an angle of 40° to 85°. prepare. PVk solution on the glass plate after ITO pus formation? After coating, dry and rub to prepare t41. Contains polyethylene film (4μm thick),
Heat and press. (Cell thickness is 2 to 5 am) In addition to this, ester-based liquid crystal RO-@-C02J5;,-OR'' (R=o
oH1o, R' = -cHt-1''H(aHs
)-U)+, the upper and lower substrates are symmetrically processed. In the next case, the black level hZ looks blue in the BmO phase under a Snicol, but in this case it is pure black and the memory performance is also good (it
Pressure? There is almost no change in the amount of light even when the light is turned off.

中た。Nakata.

しき込値特性についても、飽和゛1圧とし鎗い電圧の比
も40℃においてtlと非常によい。
As for the threshold value characteristics, the ratio of the saturation voltage to 1 voltage is also very good, tl at 40°C.

この実施例の他、ptyAについては、同じ効果を有す
るものについても同様に利用できる。
In addition to this embodiment, ptyA having the same effect can be used in the same manner.

〔発明の効果〕〔Effect of the invention〕

以上述べ次よ5に発明によれば、上下の茎板で片側Bi
 Ot斜方蒸着、もう一方配向剤うピング処理すること
により、ツイストな無くすることができその結果、高コ
ントラスト、メモリー性、Lttl、−。
As described above, according to the invention, one side of the upper and lower stem plates is Bi.
By performing Ot oblique evaporation and dipping the alignment agent on the other hand, twist can be eliminated, resulting in high contrast, memory properties, Lttl, -.

値特性な良好に保つことh;できる。It is possible to maintain good value characteristics.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の強誘電性液晶表示装置を示す断面図。 第2図は本発明の液晶配向断面図。 8J3図は従来の液晶配向断面図。 以  上 FIG. 1 is a sectional view showing a ferroelectric liquid crystal display device of the present invention. FIG. 2 is a cross-sectional view of the liquid crystal orientation of the present invention. Figure 8J3 is a cross-sectional view of conventional liquid crystal alignment. that's all

Claims (1)

【特許請求の範囲】[Claims] 強誘電性液晶を挾持する2枚の板上の配向膜付近での液
晶の自発分極方向を規定したことを特徴とした強誘電性
液晶表示装置。
A ferroelectric liquid crystal display device characterized in that the direction of spontaneous polarization of liquid crystal is defined near alignment films on two plates that sandwich the ferroelectric liquid crystal.
JP1045286A 1986-01-21 1986-01-21 Ferroelectric liquid crystal display Pending JPS62169121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1045286A JPS62169121A (en) 1986-01-21 1986-01-21 Ferroelectric liquid crystal display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1045286A JPS62169121A (en) 1986-01-21 1986-01-21 Ferroelectric liquid crystal display

Publications (1)

Publication Number Publication Date
JPS62169121A true JPS62169121A (en) 1987-07-25

Family

ID=11750532

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1045286A Pending JPS62169121A (en) 1986-01-21 1986-01-21 Ferroelectric liquid crystal display

Country Status (1)

Country Link
JP (1) JPS62169121A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0271225A (en) * 1987-10-06 1990-03-09 Canon Inc Ferroelectric liquid crystal cell

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0271225A (en) * 1987-10-06 1990-03-09 Canon Inc Ferroelectric liquid crystal cell

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