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EP0465107A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Compensator for liquid crystal display

Assignee: Eneos Corp
•
Filing: 1991-06-26
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Granted: —
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Expires: 2011-06-26
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Abstract

Abstract A compensator for an active matrix type liquid crystal display using a thin film transistor is provided. The compensator is made by a film of a liquid crystalline polymer which exhibits a twisted nematic orientation in a liquid crystal state and assumes a glassy state at temperatures below a liquid crystal transition point thereof, the constituent molecules of the liquid crystalline polymer film having a helical structure with a helical axis wherein the twist angle is in the range of 70 to 150 degrees, and the product DELTA n . d of birefringence DELTA n of the liquid crystalline polymer film and film thickness,d, being in the range of 0.2 to 3.0 mu m.

Inventors

  • 👤 Takehiro Toyooka
  • 👤 Hiroyuki Itoh
  • 👤 Shigeki Iida

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-31 09:02
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/13363; G02F1/133636; C; C09; C09K; C09K19/00; C09K19/02; C09K19/0208; C09K19/04; C09K19/38; C09K19/3833; C09K19/3842; C09K19/3852; C09K19/3866

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 109 words
A compensator for a liquid crystal display of an active matrix type, and constituted by a film of a liquid crystalline polymer which exhibits a twisted nematic orientation in a liquid crystal state and assumes a glassy state at temperatures below a liquid crystal transition point thereof, the constituent molecules of said liquid crystalline polymer film having a helical structure with a helical axis wherein the twist angle is in the range of 70 to 150 degrees, and the product Δ n · d of birefringence Δ n of the liquid crystalline polymer film and the film thickness d being in the range of 0.2 to 3.0 µ m.
Claim 2
Dependent Claim 64 words
A compensator for liquid crystal display of an active matrix type, comprising a light transmitting base, an alignment film formed on said base, and a film of a liquid crystalline polymer formed on said alignment film, said liquid crystalline polymer exhibiting a twisted nematic orientation in a liquid crystal state and assuming a glassy state at temperatures below a liquid crystal transition point thereof.
Claim 3
Dependent Claim 80 words
A compensator as set forth in claim 2, wherein the constituent molecules of said liquid crystalline polymer film have a helical structure with a helical axis in a direction perpendicular to said base, with a twist angle thereof being in the range of 70 to 150 degrees, and the product Δ n · d of birefringence of Δ n of the liquid crystalline polymer film and the film thickness d is in the range of 0.2 to 3.0 µ m.

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