EP0167398A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Ferro-electric liquid crystal electro-optical device
Assignee: Seiko Instruments Inc
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Filing: 1985-07-04
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Granted: —
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Expires: 2005-07-04
Abstract
Abstract A ferro-electric liquid crystal electro-optical device is driven by a time-sharing mode has a panel (6) with a ferro-electric liquid crystal material disposed between scanning electrodes and display electrodes. A drive circuit (4) is arranged so that the panel (6) can be driven by scanning only some of the scanning electrodes for partial rewriting a display produced by the panel. A control circuit (2) controls the drive circuit (4).
Inventors
- 👤 Takamasa Harada
- 👤 Masaaki Taguchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 17:43
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3622; G09G3/3629; G06; G06K; G06K15/00; G06K15/02; G06K15/12; G06K15/1238; G09G2310/00; G09G2310/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
A ferro-electric liquid crystal electro-optical device driven in a time-sharing mode having a panel (6) with a ferro-electric liquid crystal material disposed between scanning electrodes and display electrodes, characterised by a drive circuit '(4) arranged so that the panel (6) can be driven by scanning only some of the scanning electrodes for partial rewriting a display produced by the panel; and a control circuit (2) for controlling said drive circuit (4).
Claim 2
Dependent Claim
71 words
A ferro-electric liquid crystal electro-optical device driven in a time-sharing mode having a panel (6) with a ferro-electric liquid crystal material disposed between scanning electrodes and display electrodes, characterised by a drive circuit '(4) arranged so that the panel (6) can be driven by scanning only some of the scanning electrodes for partial rewriting a display produced by the panel; and a control circuit (2) for controlling said drive circuit (4).
Claim 3
Dependent Claim
22 words
An electro-optical device as claimed in claim 1 characterised in that the ferro-electric liquid crystal is a chiral smectic ferro-electric liquid crystal.
Claim 4
Dependent Claim
19 words
An electro-optical device as claimed in claim 1 or 2 in which the electro-optical device is a display device.
Claim 5
Dependent Claim
22 words
An electro-optical device as claimed in claim 1 or 2 characterised in that the electro-optical device is a shutter for a printer.
Claim 6
Dependent Claim
31 words
An electro-optical device as claimed in any preceding claim characterised in that the drive circuit (4) is controlled by the control circuit (2) through a start-finish scanning address designation circuit (3).
Claim 7
Dependent Claim
57 words
A ferro-electric liquid crystal electro-optical device driven in time-shearing, comprising; a panel having a ferro-electric liquid crystal disposed between scanning electrodes and display electrodes, said panel can be driven by scanning only a part of the scanning electrodes for partially rewriting, a drive portion for driving said panel, and a control portion for controlling said drive portion.
Claim 8
Dependent Claim
57 words
A ferro-electric liquid crystal electro-optical device driven in time-shearing, comprising; a panel having a ferro-electric liquid crystal disposed between scanning electrodes and display electrodes, said panel can be driven by scanning only a part of the scanning electrodes for partially rewriting, a drive portion for driving said panel, and a control portion for controlling said drive portion.
References Cited (Backward Citations)
No citation records indexed.
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