Patent US4815823A successfully refreshed from Google Patents.
US4815823A
Expired / Lapsed
US
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Electro-optical device with plural low resistive portions on each high resistive electrode
Assignee: Canon Inc
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Filing: 1988-01-26
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Granted: 1989-03-28
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Expires: 2008-01-26
Abstract
Abstract An optical modulation device comprises a first substrate having thereon a high-resistivity transparent conductor film and a plurality of low-resistivity conductor films disposed on the transparent conductor film and dividing the transparent conductor film into plural stripes; a second substrate having thereon a plurality of transparent conductor film stripes; and an optical modulation material, such as a ferroelectric liquid crystal, interposed between the first and second substrates. The optical modulation device further includes a plurality of connecting conductors for connecting with an external driver. The connecting conductors are disposed in a region free of the high-resistivity transparent conductor film of the first substrate and each connected to one of the low-resistivity conductor films.
Inventors
- 👤 Shuzo Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:28
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3622; G09G3/3629; G09G3/3637; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1343; G02F1/134309; G02F1/134336; G02F1/1345; G09G2310/00; G09G2310/06; G09G2310/066; G09G2380/00; G09G2380/04; G09G3/2007; G09G3/2011; G09G3/2014; G09G3/207
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
116 words
An optical modulation device, comprising: a first substrate having thereon a continuous high-resistivity transparent conductor film and a plurality of low-resistivity conductor films disposed on the transparent conductor film and dividing the transparent conductor film such that they appear as adjacent and parallel plural stripes; a second substrate having thereon a plurality of transparent conductor film stripes; and an optical modulation material interposed between the first and second substrates; wherein said optical modulation device further includes a plurality of connecting conductors for connection with an external driver, the connecting conductors being disposed in a region free of the high-resistivity transparent conductor film of the first substrate and each connected to one of the low-resistivity conductor films.
Claim 2
Dependent Claim
116 words
An optical modulation device, comprising: a first substrate having thereon a continuous high-resistivity transparent conductor film and a plurality of low-resistivity conductor films disposed on the transparent conductor film and dividing the transparent conductor film such that they appear as adjacent and parallel plural stripes; a second substrate having thereon a plurality of transparent conductor film stripes; and an optical modulation material interposed between the first and second substrates; wherein said optical modulation device further includes a plurality of connecting conductors for connection with an external driver, the connecting conductors being disposed in a region free of the high-resistivity transparent conductor film of the first substrate and each connected to one of the low-resistivity conductor films.
Claim 3
Dependent Claim
51 words
An optical modulation device according to claim 1, wherein each connecting conductor is connected to one of the low-resistivity conductor films through the extended portion of the low-resistivity conductor film, and the extended portion is also disposed in the region free of the high-resistivity transparent conductor film of the first substrate.
Claim 4
Dependent Claim
33 words
An optical modulation device according to claim 1, wherein the transparent conductor film stripes on the first substrate and the plurality of transparent conductor film stripes on the second substrate intersect each other.
Claim 5
Dependent Claim
24 words
An optical modulation device according to claim 1, wherein said high-resistivity conductor film on the first substrate comprises a film of SnO 2 .
Claim 6
Dependent Claim
19 words
An optical modulation device according to claim 1, wherein said low-resistivity conductor films comprise a metal or its alloy.
Claim 7
Dependent Claim
18 words
An optical modulation device according to claim 1, wherein said optical modulation material comprises a ferroelectric liquid crystal.
Claim 8
Dependent Claim
19 words
An optical modulation device according to claim 1, wherein said optical modulation material comprises a chiral smectic liquid crystal.
Claim 9
Dependent Claim
21 words
An optical modulation device according to claim 1, wherein said external driver comprises means for supplying a high frequency driving voltage.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-03-27 | 1992-09-26 | 1993-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-27 | 1996-09-26 | 1997-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-27 | 2000-09-26 | 2001-03-28 | $7700.00 | Window Closed / Lapsed |