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EP0430205A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Liquid cristal display device

Assignee: Mitsubishi Chemical Corp
•
Filing: 1990-11-28
•
Granted: —
•
Expires: 2010-11-28
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Abstract

Abstract Because an optically active compound for use in the present invention shows a very rapid response and also exhibits a ferroelectric smectic liquid phase which takes three stable states of molecular orientation, a liquid crystal display device according to the present invention can display an intermediate tone in addition to "bright" and "dark" states. Therefore, the liquid crystal display device of the present invention is very suitable for display devices, e.g., a liquid crystal TV, and opto-electronic devices, e.g., a light printer and a light valve, in particular for an image display device and a multicolor display device.

Inventors

  • 👤 Hiroshi C/O Mitsubishi Iwane
  • 👤 Shiroh C/O Mitsubishi Inui
  • 👤 Shoichi C/O Mitsubishi Seo
  • 👤 Shin C/O Mitsubishi Kawano
  • 👤 Noriko C/O Mitsubishi Wada
  • 👤 Masaki C/O Mitsubishi Saito

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-06 04:58
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3441; C09K19/345; C09K19/3458; C09K19/3463

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 54 words
A liquid crystal display device capable of displaying an intermediate tone using an optically active compound represented by formula (I): wherein R¹ represents an alkyl or alkoxy group having from 6 to 16 carbon atoms; R² represents an alkyl group having from 4 to 12 carbon atoms; and * indicates an optically active center.
Claim 2
Dependent Claim 25 words
A liquid crystal display device as claimed in Claim 1, wherein R¹ represents an alkyl or alkoxy group having from 10 to 14 carbon atoms.
Claim 3
Dependent Claim 23 words
A liquid crystal display device as claimed in Claim 1, wherein R² represents an alkyl group having from 6 to 10 carbon atoms.
Claim 4
Independent Claim 68 words
A method of displaying bright, dark and an intermediate tone with changes in intensity of an applied electric field using a liquid crystal display device using an optically active compound represented by formula (I): wherein R¹ represents an alkyl or alkoxy group having from 6 to 16 carbon atoms; R² represents an alkyl group having from 4 to 12 carbon atoms; and * indicates an optically active center.

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