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US4930876A Expired / Lapsed US ⏱️ 0.0 years remaining

Liquid crystal display device

Assignee: Ricoh Co Ltd
•
Filing: 1988-10-27
•
Granted: 1990-06-05
•
Expires: 2008-10-27
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Abstract

Abstract A liquid crystal display device including a pair of transparent baseplates which are opposed to each other. A pair of transparent electrodes are disposed on an inner surface of each of the baseplates. A sealing member is disposed so as to form a chamber between the baseplates for containing therein the transparent electrodes and a liquid crystal. Contact electrodes are disposed on one end portion of the inner surface of each of the baseplates for contacting with a pair of external electrodes to be inserted into the device, from the external electrodes a signal to control optical transmission/screening of the liquid crystal being received. A pair of connecting electrodes are disposed on the inner surface of each of the baseplates for electrically connecting the contact electrodes with the transparent electrodes in order to transmit the signal from the contact electrodes to the transparent electrodes. The device is constructed so that the connecting electrodes are not electrically conducted with each other.

Inventors

  • 👤 Takumi Suzuki
  • 👤 Kiyohiro Uehara
  • 👤 Hisao Takahashi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 16:25
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1345

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 197 words
A liquid crystal display device comprising: a pair of transparent baseplates which are opposed to each other; a pair of transparent electrodes each disposed on an inner surface of each of the baseplates; a sealing member disposed so as to form a chamber between the baseplates for containing therein the transparent electrodes and a liquid crystal; an orientating material covering at least one of said baseplates inside said chamber; a pair of contact electrodes each disposed on one end portion of the inner surface of each of the baseplates for contacting with a pair of external electrodes to be inserted into said device, from said external electrodes a signal to control optical transmission/screening of the liquid crystal being received; a pair of connecting electrodes each disposed on the inner surface of each of the baseplates for electrically connecting the contact electrodes with the transparent electrodes in order to transmit the signal from the contact electrodes to the transparent electrodes; and an insulating film having substantially the same thickness and composition as said orientating material placed in those areas of said at least one baseplate that are not contacted by said contact electrodes and not inside said chamber.
Claim 2
Dependent Claim 197 words
A liquid crystal display device comprising: a pair of transparent baseplates which are opposed to each other; a pair of transparent electrodes each disposed on an inner surface of each of the baseplates; a sealing member disposed so as to form a chamber between the baseplates for containing therein the transparent electrodes and a liquid crystal; an orientating material covering at least one of said baseplates inside said chamber; a pair of contact electrodes each disposed on one end portion of the inner surface of each of the baseplates for contacting with a pair of external electrodes to be inserted into said device, from said external electrodes a signal to control optical transmission/screening of the liquid crystal being received; a pair of connecting electrodes each disposed on the inner surface of each of the baseplates for electrically connecting the contact electrodes with the transparent electrodes in order to transmit the signal from the contact electrodes to the transparent electrodes; and an insulating film having substantially the same thickness and composition as said orientating material placed in those areas of said at least one baseplate that are not contacted by said contact electrodes and not inside said chamber.
Claim 3
Dependent Claim 22 words
A liquid crystal display device according to claim 1, wherein at least one of the baseplates is made of a polymer film.
Claim 4
Dependent Claim 38 words
A liquid crystal display device according to claim 1, wherein the connecting electrodes are disposed at such positions that they are not overlapped with each other in order that they will not be electrically conducted with each other.
Claim 5
Dependent Claim 22 words
A liquid crystal display device according to claim 3, wherein at least one of the baseplates is made of a polymer film.

References Cited (Backward Citations)

JPS5670529A Cited
US4425030A Cited
US4386293A Cited
US4457589A Cited
US4789712A Cited
US4640581A Cited
JPS62112128A Cited
US4810061A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1993-06-04 1993-12-04 1994-06-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1997-06-04 1997-12-04 1998-06-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2001-06-04 2001-12-04 2002-06-05 $7700.00 Window Closed / Lapsed

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