Patent US5481320A successfully refreshed from Google Patents.
US5481320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-optical apparatus utilizing at least three electro-optical modulating device to provide a sythesized color image and method of driving same
Assignee: Semiconductor Energy Laboratory Co Ltd
•
Filing: 1992-07-13
•
Granted: 1996-01-02
•
Expires: 2012-07-13
Abstract
Abstract An electro-optical device includes a light amplifying portion comprising a first substrate having a transparent conductive film, a photoconductor whose electric resistance is lowered in accordance with light irradiation and a dielectric thin film, a second substrate having a transparent conductive film and uniaxially-orienting layer and a ferroelectric liquid crystal or antiferroelectric liquid crystal layer sandwiched between the first and second substrate, an image write-in portion comprising a display body, a mirror for splitting an image light into three color lights and light shutters for performing a switching operation between transmission and interception of the split lights, and serves to irradiate the image light through the first substrate of each light amplifying portion, an image read-out portion comprising a light source for irradiating light through the second substrate of each of the three light amplifying portions, and red, green and blue color filter portions, and an imaging portion for synthesizing image lights transmitted through the image read-out portion and reflected from the light amplifying portions into a synthesized image.
Inventors
- 👤 Toshimitsu Konuma
- 👤 Akira Mase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:06
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3102; H04N9/3111; H04N5/00; H04N5/74; G; G09; G09G; G09G3/00; G09G3/001; G09G3/20; G09G3/34; G09G3/36; H04N9/3114; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/135; G09G2310/00; G09G2310/02; G09G2310/0235; G09G2360/00; G09G2360/14; G09G2360/141; G09G2360/142; G09G3/3406; H04N5/7416; H04N5/7441
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
220 words
An electro-optical device comprising: at least three electro-optical devices, each of said three electro-optical devices comprising a transparent conductive film provided on a first substrate, a photoconductor provided on said transparent conductive film, a dielectric film provided on said photoconductor and capable of intercepting a light, a second substrate provided with a transparent conductive film and orientation control means thereon, and an electro-optical modulating layer provided between said first substrate and said second substrate; means capable of emitting an image light; means for distributing said image light into at least three light components; at least three optical shutters capable of transmitting and intercepting said at least three light components, respectively, said at least three light components transmitted by said at least three optical shutters being incident on the respective first substrates of said at least three electro-optical devices, respectively; a light source; at least three filters for separating the light emitted from said light source into at least three different color light components respectively; and means for synthesizing at least three light patterns reflected from said at least three electro-optical devices, wherein said at least three different color light components are incident on the second substrates of said at least three electro-optical devices and reflected from said at least three electro-optical devices to produce said at least three light patterns.
Claim 2
Dependent Claim
220 words
An electro-optical device comprising: at least three electro-optical devices, each of said three electro-optical devices comprising a transparent conductive film provided on a first substrate, a photoconductor provided on said transparent conductive film, a dielectric film provided on said photoconductor and capable of intercepting a light, a second substrate provided with a transparent conductive film and orientation control means thereon, and an electro-optical modulating layer provided between said first substrate and said second substrate; means capable of emitting an image light; means for distributing said image light into at least three light components; at least three optical shutters capable of transmitting and intercepting said at least three light components, respectively, said at least three light components transmitted by said at least three optical shutters being incident on the respective first substrates of said at least three electro-optical devices, respectively; a light source; at least three filters for separating the light emitted from said light source into at least three different color light components respectively; and means for synthesizing at least three light patterns reflected from said at least three electro-optical devices, wherein said at least three different color light components are incident on the second substrates of said at least three electro-optical devices and reflected from said at least three electro-optical devices to produce said at least three light patterns.
Claim 3
Dependent Claim
20 words
The device of claim 1 wherein resistance of said photoconductor is decreased in response to incidence of a light thereon.
Claim 4
Dependent Claim
29 words
The device of claim 1 wherein said electro-optical modulating layer comprises a liquid crystal selected from the group consisting of a ferroelectric liquid crystal and an antiferroelectric liquid crystal.
Claim 5
Dependent Claim
12 words
The device of claim 1 wherein said distributing means comprises half mirrors.
Claim 6
Dependent Claim
38 words
The device of claim 1 wherein said means capable of emitting an image light comprises a device selected from the group consisting of a cathode ray tube, a liquid crystal panel, an electroluminescence panel and a plasma display.
Claim 7
Dependent Claim
23 words
The device of claim 1 wherein said at least three optical shutters comprise ferroelectric liquid crystal panels or dispersion type liquid crystal panels.
Claim 8
Dependent Claim
19 words
The device of claim 1 wherein said at least three light patterns are red, green and blue light patterns.
Claim 9
Dependent Claim
17 words
The device of claim 1 wherein said three different light components are red, green and blue respectively.
References Cited (Backward Citations)
US3781465A
Cited
US4127322A
Cited
US4019807A
Cited
US4150876A
Cited
US4566029A
Cited
US4748510A
Cited
US4786146A
Cited
JPS63312781A
Cited
WO1991007851A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-01-01 | 1999-07-03 | 2000-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-01 | 2003-07-03 | 2004-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-01 | 2007-07-03 | 2008-01-02 | $7700.00 | Window Closed / Lapsed |