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EP0424944A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Ferroelectric liquid crystal device

Assignee: Canon Inc
•
Filing: 1990-10-25
•
Granted: —
•
Expires: 2010-10-25
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Abstract

Abstract A ferroelectric liquid crystal device is formed by disposing a ferroelectric liquid crystal between a pair of substrates, each having thereon a group of electrodes for driving the ferroelectric liquid crystal and provided with a uniaxial alignment axis for aligning the ferroelectric liquid crystal molecules. The uniaxial alignment axes provided to the pair of substrates are disposed to intersect each other at a prescribed intersection angle, and the liquid crystal molecules (501) are aligned to provide a director (503) forming a pre-tilt angle (α) of 5 to 35 degrees with the liquid crystal aligning surfaces (502) of the substrates (101-101a). The ferroelectric liquid crystal device provides an improved contrast as well as a broad drive margin.

Inventors

  • 👤 Yasuto Kodera

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 15:18
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/137; G02F1/139; G02F1/141; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133746

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 94 words
A ferroelectric liquid crystal device, comprising a pair of substrates and a ferroelectric liquid crystal disposed between the substrates, each substrate having thereon a group of electrodes for driving the ferroelectric liquid crystal and provided with a uniaxial alignment axis for aligning the ferroelectric liquid crystal molecules; wherein the uniaxial alignment axes provided to the pair of substrates intersect each other at a prescribed intersection angle, and the liquid crystal molecules are aligned to provide a director forming a pre-tilt angle of 5 to 35 degrees with the liquid crystal-­aligning surfaces of the substrates.
Claim 2
Dependent Claim 94 words
A ferroelectric liquid crystal device, comprising a pair of substrates and a ferroelectric liquid crystal disposed between the substrates, each substrate having thereon a group of electrodes for driving the ferroelectric liquid crystal and provided with a uniaxial alignment axis for aligning the ferroelectric liquid crystal molecules; wherein the uniaxial alignment axes provided to the pair of substrates intersect each other at a prescribed intersection angle, and the liquid crystal molecules are aligned to provide a director forming a pre-tilt angle of 5 to 35 degrees with the liquid crystal-­aligning surfaces of the substrates.
Claim 3
Dependent Claim 18 words
A ferroelectric liquid crystal device according to Claim 1, wherein said intersection angle is 2 to 25 degrees.
Claim 4
Dependent Claim 33 words
A liquid crystal display device, including a ferroelectric liquid crystal device according to Claim 1, a drive means for driving the ferroelectric liquid crystal device based on image signals, and a light source.
Claim 5
Dependent Claim 40 words
A liquid crystal display apparatus, including a liquid crystal display device according to Claim 3, a means for controlling the drive of the liquid crystal display device, and a means for controlling power supply to the liquid crystal display device.
Claim 6
Dependent Claim 33 words
A recording apparatus, including a ferroelectric liquid crystal device according to Claim 1, a means for driving the ferroelectric liquid crystal device based on image signals, a photosensitive member, and a developing device.

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