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EP0201341A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Liquid crystal display element and process for producing same

Assignee: JNC Corp
•
Filing: 1986-05-08
•
Granted: —
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Expires: 2006-05-08
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Abstract

Abstract A liquid crystal display element which exhibits a monodomain state in a ferroelectric Sc* phase, and a process for producing the same are provided, which element comprises using a ferroelectric liquid crystal material which has all of isotropic, cholesteric, smectic A and ferroelectric chiral smectic C phases in this order toward the temperature-descending direction starting from the isotropic phase, the respective helical pitches in the cholesteric and smectic C phases being 2 mu m or more, and which process comprises using the above-described ferroelectric liquid crystal material and carrying out the alignment of the chiral smectic C phase.

Inventors

  • 👤 Mitsuyoshi Ichihashi
  • 👤 Kanetsugu Terashima
  • 👤 Kenji Furukawa

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 21:54
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/137; G02F1/139; G02F1/141

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 61 words
A liquid crystal display element using a ferroelectric liquid crystal material which has all of an isotropic phase, a cholesteric phase, a smectic A phase and a ferroelectric chiral smectic C phase in this order toward the temperature-descending direction starting from said isotropic phase, the respective helical pitches in said cholesteric phase and smectic C phase being 2 µm or more.
Claim 2
Dependent Claim 61 words
A liquid crystal display element using a ferroelectric liquid crystal material which has all of an isotropic phase, a cholesteric phase, a smectic A phase and a ferroelectric chiral smectic C phase in this order toward the temperature-descending direction starting from said isotropic phase, the respective helical pitches in said cholesteric phase and smectic C phase being 2 µm or more.
Claim 3
Dependent Claim 79 words
A process for producing a liquid crystal display element which comprises carrying out alignment of a chiral smectic C phase by the use of a ferroelectric liquid crystal material which has all of an isotropic phase, a cholesteric phase, a smectic A phase and a ferroelectric chiral smectic C phase in this order toward the temperature-descending direction starting from said isotropic phase, the respective helical pitches in said cholesteric phase and smectic C phase being 2 µm or more.
Claim 4
Dependent Claim 79 words
A process for producing a liquid crystal display element which comprises carrying out alignment of a chiral smectic C phase by the use of a ferroelectric liquid crystal material which has all of an isotropic phase, a cholesteric phase, a smectic A phase and a ferroelectric chiral smectic C phase in this order toward the temperature-descending direction starting from said isotropic phase, the respective helical pitches in said cholesteric phase and smectic C phase being 2 µm or more.

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