US4935757A
Expired / Lapsed
US
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Liquid crystal display device
Assignee: Sharp Corp
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Filing: 1988-07-25
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Granted: 1990-06-19
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Expires: 2008-07-25
Abstract
Abstract A liquid crystal display device includes a pair of transparent substrates with liquid crystal sealed therebetween. A first transparent conductive film is selectively formed on at least one of the two transparent substrates. A colored light-transmitting member is formed on the first transparent conductive film, and second transparent conductive film covers the colored light-transmitting member and is made to contact the first transparent conductive film at the area where the colored light-transmitting member is not formed.
Inventors
- 👤 Akitsugu Hatano
- 👤 Kenichi Nakagawa
- 👤 Naofumi Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:03
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133514
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
153 words
A liquid crystal display having a plurality of display elements comprising: first and second spaced apart parallel substrates; a liquid crystal material provided between said parallel substrates; first and second groups of first and second electrodes formed on said first and second substrates, respectively, said first and second electrodes intersecting to form display elements defined thereby; each of said first electrodes being transparent and extending across said first substrate to define a first group of display elements; color filters extending across said display elements; and conductive overlay electrodes, each extending across a corresponding area of said first electrodes and covering the color filters extending across the said display elements defined thereby; each said conductive overlay electrode being connected to its associated said first electrode only on areas not overlying said display elements to thereby form a conductive electrode assembly having a lowered resistance without reducing the color filtered area of said display elements.
Claim 2
Dependent Claim
153 words
A liquid crystal display having a plurality of display elements comprising: first and second spaced apart parallel substrates; a liquid crystal material provided between said parallel substrates; first and second groups of first and second electrodes formed on said first and second substrates, respectively, said first and second electrodes intersecting to form display elements defined thereby; each of said first electrodes being transparent and extending across said first substrate to define a first group of display elements; color filters extending across said display elements; and conductive overlay electrodes, each extending across a corresponding area of said first electrodes and covering the color filters extending across the said display elements defined thereby; each said conductive overlay electrode being connected to its associated said first electrode only on areas not overlying said display elements to thereby form a conductive electrode assembly having a lowered resistance without reducing the color filtered area of said display elements.
Claim 3
Dependent Claim
31 words
The liquid crystal display of claim 1 wherein said display is a matrix display and wherein said first and second groups of first and second electrodes comprise groups of collinear electrodes.
Claim 4
Dependent Claim
22 words
The liquid crystal display of claim 2 wherein said first and second electrodes are formed of a transparent Indium Tin Oxide film.
Claim 5
Dependent Claim
28 words
The liquid crystal display of claim 2 further comprising a black mask formed over said overlay electrodes and having openings provided therein in registration with said picture elements.
Claim 6
Dependent Claim
16 words
The liquid crystal display of claim 4 wherein said black mask is made of UV-setting resin.
Claim 7
Dependent Claim
48 words
The liquid crystal display of claim 7, wherein the resistance of each said conductive electrode assembly is sufficiently small so that the light transmittance of said liquid crystal material is changed suddenly around the threshold voltage value at which the optical characteristic of said liquid crystal material changes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-18 | 2001-12-18 | 2002-06-19 | $7700.00 | Window Closed / Lapsed |