US5220444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflective-type liquid crystal display device with etched oxide layer between substrate and metal film and method for producing same
Assignee: Sharp Corp
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Filing: 1991-07-17
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Granted: 1993-06-15
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Expires: 2011-07-17
Abstract
Abstract A reflective-type liquid crystal display device and a method for producing same, the reflective-type liquid crystal display device including a transmissive substrate including pixel electrodes, a reflection plate comprising a core plate having an uneven surface on one side thereof and a metal thin layer covering the uneven surface of the substrate, a liquid crystal layer interposed between the substrate and the reflection plate.
Inventors
- 👤 Seiichi Mitsui
- 👤 Naofumi Kimura
- 👤 Yutaka Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:56
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/137; G02F1/13725; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133553; G02F1/1343; G02F1/13439; G02F2201/00; G02F2201/12; G02F2201/121; G02F2203/00; G02F2203/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
66 words
A reflective-type liquid crystal display device comprising a transmissive substrate including pixel electrodes, a reflection plate comprising a glass substrate, an oxide layer formed on a first surface of the substrate and etched to form an uneven surface on the first surface of the substrate, a metal thin layer covering the uneven surface, and a liquid crystal layer interposed between the substrate and the reflection plate.
Claim 2
Dependent Claim
66 words
A reflective-type liquid crystal display device comprising a transmissive substrate including pixel electrodes, a reflection plate comprising a glass substrate, an oxide layer formed on a first surface of the substrate and etched to form an uneven surface on the first surface of the substrate, a metal thin layer covering the uneven surface, and a liquid crystal layer interposed between the substrate and the reflection plate.
Claim 3
Dependent Claim
50 words
The reflective-type liquid crystal display device according to claim 1, wherein the uneven surface of the substrate comprises a repetition of hills and valleys, the hills being arranged with plural pitches the average pitch of the pitches between one hill and an adjacent hill being not greater than 100 μm.
Claim 4
Dependent Claim
30 words
The reflective-type liquid crystal display device according to claim 1 or 2, wherein the surface on which the metal thin layer is formed is disposed toward the liquid crystal layer.
Claim 5
Dependent Claim
31 words
The reflective-type liquid crystal display device according to claim 3, wherein the metal thin layer functions as a counter electrode for the pixel electrodes with the liquid crystal layer being interposed.
Claim 6
Independent Claim
60 words
A method for producing a reflective-type liquid crystal display device, the method comprising the steps of preparing a glass substrate, forming an oxide layer on a first surface of the substrate, etching the oxide layer of the substrate to form an uneven surface on the first surface of the substrate, and forming a metal think layer on the uneven surface.
Claim 7
Independent Claim
60 words
A method for producing a reflective-type liquid crystal display device, the method comprising the steps of preparing a glass substrate, forming an oxide layer on a first surface of the substrate, etching the oxide layer of the substrate to form an uneven surface on the first surface of the substrate, and forming a metal think layer on the uneven surface.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-14 | 1996-12-14 | 1997-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-14 | 2000-12-14 | 2001-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-14 | 2004-12-14 | 2005-06-15 | $7700.00 | Window Closed / Lapsed |