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US5764324A
Expired / Lapsed
US
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Flicker-free reflective liquid crystal cell
Assignee: AUO Corp
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Filing: 1997-01-22
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Granted: 1998-06-09
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Expires: 2017-01-22
Abstract
Abstract A reflective liquid crystal cell for AMLCDs is provided wherein the reflective electrode may be passivated with an insulating film such as silicon oxide. In addition, the liquid crystal cell of the present invention may include a conducting transparent electrode that has a work function substantially equal to the work function of the reflective electrode in the cell. The reflective electrode may include a transparent conductive layer such as ITO, or may include an integer number of film pairs, wherein the film pair comprises a first dielectric film having a low index of refraction and a second dielectric film having a high index of refraction.
Inventors
- 👤 Minhua Lu
- 👤 Kei-Hsiung Yang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:42
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/1343; G02F1/13439; G02F1/133553; G02F1/1339; G02F1/13394; G02F1/136; G02F1/1362; G02F1/136227; G02F1/136277
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
60 words
A liquid crystal cell for a liquid crystal display device comprising: a transparent electrode; a reflective electrode; and a liquid crystal material disposed between said transparent electrode and said reflective electrode; wherein work functions of said transparent electrode and said reflective electrode are approximately equal and wherein said reflective electrode comprises a transparent conductive layer and a reflecting metal layer.
Claim 2
Dependent Claim
60 words
A liquid crystal cell for a liquid crystal display device comprising: a transparent electrode; a reflective electrode; and a liquid crystal material disposed between said transparent electrode and said reflective electrode; wherein work functions of said transparent electrode and said reflective electrode are approximately equal and wherein said reflective electrode comprises a transparent conductive layer and a reflecting metal layer.
Claim 3
Dependent Claim
14 words
The liquid crystal cell of claim 1, wherein said reflecting metal layer comprises aluminum.
Claim 4
Dependent Claim
14 words
The liquid crystal cell of claim 2, wherein said transparent conductive layer comprises ITO.
Claim 5
Dependent Claim
25 words
The liquid crystal cell of claim 1, wherein the thickness of said transparent conductive layer is approximately a half-wave plate for a predetermined incident light.
Claim 6
Dependent Claim
20 words
The liquid crystal cell of claim 1, wherein said liquid crystal cell is used in a spatial light modulator device.
Claim 7
Dependent Claim
69 words
A liquid crystal cell for a liquid crystal display device comprising: a transparent electrode; a reflective electrode; and a liquid crystal material disposed between said transparent electrode and said reflective electrode; wherein work functions of said transparent electrode and said reflective electrode are approximately equal, and wherein said reflective electrode comprises at least one layer of dielectric material disposed between a transparent conductive layer and a reflecting metal layer.
Claim 8
Dependent Claim
69 words
A liquid crystal cell for a liquid crystal display device comprising: a transparent electrode; a reflective electrode; and a liquid crystal material disposed between said transparent electrode and said reflective electrode; wherein work functions of said transparent electrode and said reflective electrode are approximately equal, and wherein said reflective electrode comprises at least one layer of dielectric material disposed between a transparent conductive layer and a reflecting metal layer.
Claim 9
Dependent Claim
14 words
The liquid crystal cell of claim 6, wherein said transparent conductive layer comprises ITO.
Claim 10
Dependent Claim
14 words
The liquid crystal cell of claim 6, wherein said dielectric material comprises silicon dioxide.
Claim 11
Dependent Claim
30 words
The liquid crystal cell of claim 6, wherein the thickness of said at least one layer of dielectric material and said transparent conductive layer is optimized to achieve high reflectivity.
Claim 12
Dependent Claim
21 words
The liquid crystal cell of claim 8, wherein said reflective electrode comprises at least one pair of layers of dielectric material.
Claim 13
Dependent Claim
45 words
The liquid crystal cell of claim 10, wherein a first layer of said at least one pair of layers of dielectric material has a lower index of refraction with respect to a second layer of said at least one pair of layers of dielectric material.
Claim 14
Dependent Claim
21 words
The liquid crystal cell of claim 11, wherein said transparent conductive layer comprises ITO and said dielectric material comprises silicon dioxide.
Claim 15
Dependent Claim
20 words
The liquid crystal cell of claim 6, wherein said liquid crystal cell is used in a spatial light modulator device.
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) | 2001-06-08 | 2001-12-08 | 2002-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-08 | 2005-12-08 | 2006-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-08 | 2009-12-08 | 2010-06-09 | $7700.00 | Window Closed / Lapsed |