Electrically conductive polymers and their use as orienting layer in liquid-crystal switching and display elements
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C02F-001/13
출원번호
US-0562600
(1990-08-03)
우선권정보
DE-3925970 (1989-03-05)
발명자
/ 주소
Escher Claus (Mhltal DEX) Dbal Hans-Rolf (Knigstein DEX) Feldhues Michael (Bad Soden am Taunus DEX) Harada Takamasa (Oberursel DEX) Illian Gerhard (Frankfurt am Main DEX) Mecklenburg Thomas (Butzbach
출원인 / 주소
Hoechst Aktiengesellschaft (Frankfurt am Main DEX 03)
인용정보
피인용 횟수 :
11인용 특허 :
0
초록▼
Switching and display elements based on ferroelectric liquid-crystals often exhibit a pronounced optical hysteresis which results in the appearance of so-called ghost images. This phenomenon can be markedly reduced or even suppressed if at least one of the two orienting layers are in direct contact
Switching and display elements based on ferroelectric liquid-crystals often exhibit a pronounced optical hysteresis which results in the appearance of so-called ghost images. This phenomenon can be markedly reduced or even suppressed if at least one of the two orienting layers are in direct contact with the electrodes and is composed of an electrically conductive polymer of the formula (I): [Figure] (I) in which R1, R2=independently of each other, H, or straight-chain or branched alkyl or alkoxy containing 1-16 carbon atoms, or halogen, X=S, NH, Y-=BF4-, PF6-, PO43-, AsF6-, SbCl6-, SO42-, HSO4-, alkyl-SO3-, perfluoroalkyl-SO3-, aryl-SO3, F-or Cl-, and n is an integer from 4 to 100 and m is an integer from 1 to 30.
대표청구항▼
A liquid-crystal switching and display element containing a ferroelectric liquid-crystalline medium, two electrodes, at least one polarizer, two transparent carrier plates and at least one orienting layer, wherein at least one of the orienting layers is in direct electrical contact with the associat
A liquid-crystal switching and display element containing a ferroelectric liquid-crystalline medium, two electrodes, at least one polarizer, two transparent carrier plates and at least one orienting layer, wherein at least one of the orienting layers is in direct electrical contact with the associated electrode and said orienting layer contains an electrically conductive polymer of the formula (I): [Figure] (I) where R1, R2 =independently of each other, H, or straight-chain or branched alkyl or alkoxy containing 1-16 carbon atoms, or halogen, X is sulfur or NH, Y is BF4-, PF5-, PO43-AsF6-, SbCl6-, SO42-, HSO4-, alkyl-SO3-, perfluoroalkyl-SO3-, aryl-SO3-, F-or Cl-, and n is an integer from 4 to 100 m is an integer from 1 to 30.
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이 특허를 인용한 특허 (11)
Nagarkar, Pradnya V.; Richard, James T.; Heath, Linda S.; Sen, Radha; Ram, Jyothsna, Ablation enhancement layer.
Pradnya V. Nagarkar ; James T. Richard ; Linda S. Heath ; Carl A. Chiulli ; Radha Sen ; Jyothsna Ram GB; David W. McCarthy, Ablation enhancement layer.
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