US4097131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflective type liquid crystal display
Assignee: Sharp Corp
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Filing: 1976-11-24
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Granted: 1978-06-27
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Expires: 1996-11-24
Abstract
Abstract In a reflective type liquid crystal display comprising a rear support plate carrying a segmented reflective electrode in a predetermined display region, a front support plate carrying a transparent electrode of indium oxide at least in a region corresponding to the reflective electrode and a reflective coating of aluminum in a region except the region corresponding to the reflective electrode, and a liquid crystal composition sandwiched between the two support plates, there is provided an intermediate layer made of a material selected from the group consisting of magnesium fluoride, thorium fluoride, silicon dioxide, silicon monoxide, cerium oxide and magnesium oxide intermediate the indium oxide transparent electrode deposited on at least the region corresponding to the reflective electrode and the aluminum reflective coating deposited on the region except the region corresponding to the reflector electrode.
Inventors
- 👤 Mitsuru Nishiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:30
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1343; G02F1/13439; G02F1/133345; G02F1/1335; G02F1/133553
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
101 words
A reflective type liquid crystal display comprising: first and second support plates; a segmented reflective electrode deposited on said first support plate; a transparent electrode deposited on said second support plate; a reflective coating deposited on said second support plate in a region except the region corresponding to said reflective electrode; an intermediate layer of insulator material interposed between said transparent electrode and said reflective coating, said intermediate layer being capable of preventing a chemical reaction about the interface between said transparent electrode and said reflective coating; and a liquid crystal composition sandwiched between said first and said second support plates.
Claim 2
Dependent Claim
101 words
A reflective type liquid crystal display comprising: first and second support plates; a segmented reflective electrode deposited on said first support plate; a transparent electrode deposited on said second support plate; a reflective coating deposited on said second support plate in a region except the region corresponding to said reflective electrode; an intermediate layer of insulator material interposed between said transparent electrode and said reflective coating, said intermediate layer being capable of preventing a chemical reaction about the interface between said transparent electrode and said reflective coating; and a liquid crystal composition sandwiched between said first and said second support plates.
Claim 3
Dependent Claim
150 words
A reflective type liquid crystal display comprising: first and second support plates made of glass; an aluminuim segmented reflective electrode deposited in a display region on said first support plate; an indium oxide transparent electrode deposited in at least a display region corresponding to that of the aluminum reflective electrode on said second support plate; an aluminum reflective coating in a region except the display region corresponding to the aluminum reflective electrode; an intermediate insulator layer made of a material selected from the group consisting of magnesium fluoride, thorium fluoride, silicon dioxide, silicon monoxide, cerium oxide and magnesium oxide and interposed between said indium oxide transparent electrode and said aluminum reflective coating, said intermediate layer being capable of preventing a chemical reaction about the interface between said indium oxide transparent electrode and said aluminum reflective coating; and a liquid crystal composition sandwiched between said first and said second support plates.
Claim 4
Dependent Claim
150 words
A reflective type liquid crystal display comprising: first and second support plates made of glass; an aluminuim segmented reflective electrode deposited in a display region on said first support plate; an indium oxide transparent electrode deposited in at least a display region corresponding to that of the aluminum reflective electrode on said second support plate; an aluminum reflective coating in a region except the display region corresponding to the aluminum reflective electrode; an intermediate insulator layer made of a material selected from the group consisting of magnesium fluoride, thorium fluoride, silicon dioxide, silicon monoxide, cerium oxide and magnesium oxide and interposed between said indium oxide transparent electrode and said aluminum reflective coating, said intermediate layer being capable of preventing a chemical reaction about the interface between said indium oxide transparent electrode and said aluminum reflective coating; and a liquid crystal composition sandwiched between said first and said second support plates.
Claim 5
Dependent Claim
24 words
The reflective type liquid crystal display as set forth in claim 1 wherein the thickness of the intermediate layer is 300 - 400 A.
Claim 6
Dependent Claim
85 words
A reflective type liquid crystal display comprising first and second support plates, a liquid crystal composition, a reflective electrode carried on the first support plate and a transparent electrode carried on the second support plate, characterized in that a reflective coating having no region corresponding to the reflective electrode is deposited on the second support plate via a transparent insulator layer made of fluoride material or oxide material capable of preventing a chemical reaction about the interface between the transparent electrode and the reflective coating.
Claim 7
Dependent Claim
85 words
A reflective type liquid crystal display comprising first and second support plates, a liquid crystal composition, a reflective electrode carried on the first support plate and a transparent electrode carried on the second support plate, characterized in that a reflective coating having no region corresponding to the reflective electrode is deposited on the second support plate via a transparent insulator layer made of fluoride material or oxide material capable of preventing a chemical reaction about the interface between the transparent electrode and the reflective coating.
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) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |