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US5327272A
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Optical modulation element
Assignee: Canon Inc
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Filing: 1992-03-25
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Granted: 1994-07-05
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Expires: 2012-03-25
Abstract
Abstract An optical modulation element, in which a pixel surrounding a ferroelectric liquid crystal layer and an column shaped orientation layer is formed between a pair of electrodes. The orientation layer is formed by a high-molecular polymer in which an ultrafine granular conductive substance may be dispersed. External voltage applied across the electrodes in response to gradation signals performs gradation drivings.
Inventors
- 👤 Ryoji Fujiwara
- 👤 Shuzo Kaneko
- 👤 Akio Maruyama
- 👤 Tomoko Maruyama
- 👤 Tomoko Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:06
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; C; C09; C09K; C09K19/00; C09K19/52; C09K19/58; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; G02F1/13378; G02F1/133784; G02F1/133796; G02F1/137; G02F1/139; G02F1/141; G02F2203/00; G02F2203/30
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
87 words
An optical modulation element having a plurality of pixels, said optical modulation element comprising: a pair of substrates each having a plurality of electrodes thereon, a ferroelectric liquid crystal layer disposed between said pair of substrates, and means for applying an external voltage between said electrodes in response to gradation signals to perform gradation drivings, wherein said optical modulation element further comprises: a conductive polymer layer with conductive fine granular tin oxide doped with Sb, and a column-shaped orientation layer on and partially exposing said polymer layer.
Claim 2
Dependent Claim
87 words
An optical modulation element having a plurality of pixels, said optical modulation element comprising: a pair of substrates each having a plurality of electrodes thereon, a ferroelectric liquid crystal layer disposed between said pair of substrates, and means for applying an external voltage between said electrodes in response to gradation signals to perform gradation drivings, wherein said optical modulation element further comprises: a conductive polymer layer with conductive fine granular tin oxide doped with Sb, and a column-shaped orientation layer on and partially exposing said polymer layer.
Claim 3
Dependent Claim
24 words
An optical modulation element according to claim 1, wherein said high-molecular polymer is a high-molecular polymer in which a ultrafine granular substance is dispersed.
Claim 4
Dependent Claim
32 words
An optical modulation element according to Claim 1, wherein said high-molecular polymer has a specific resistance of 10 8 -2×10 11 Ω·cm and a dielectric constant of 20 dielectric constant or more.
Claim 5
Dependent Claim
23 words
An optical modulation element according to Claim 1, wherein said ferroelectric liquid crystal layer includes a dopant for providing a low resistance therefor.
Claim 6
Dependent Claim
88 words
An optical modulation element having a pixel, said optical modulation element comprising: a pair of substrates having an electrode on at least one of said pair of substrates with a ferroelectric liquid crystal layer disposed between said pair of substrates, and means for applying an external voltage to said electrode in order to modulate said pixel, wherein said optical modulation element further comprises: a conductive polymer layer with conductive fine granular tin oxide doped with Sb, and a column-shaped orientation layer on and partially exposing said polymer layer.
Claim 7
Dependent Claim
88 words
An optical modulation element having a pixel, said optical modulation element comprising: a pair of substrates having an electrode on at least one of said pair of substrates with a ferroelectric liquid crystal layer disposed between said pair of substrates, and means for applying an external voltage to said electrode in order to modulate said pixel, wherein said optical modulation element further comprises: a conductive polymer layer with conductive fine granular tin oxide doped with Sb, and a column-shaped orientation layer on and partially exposing said polymer layer.
Claim 8
Dependent Claim
20 words
An optical modulation element according to claim 5, wherein said column-shaped orientation layer is an inorganic oxide oblique deposition layer.
Claim 9
Dependent Claim
19 words
An optical modulation element according to claim 5, wherein said liquid crystal layer comprises a chiral smectic liquid crystal.
Claim 10
Dependent Claim
24 words
An optical modulation element according to claim 7, wherein said chiral smectic liquid crystal layer includes a dopant for providing a low resistance thereto.
Claim 11
Dependent Claim
24 words
An optical modulation element according to claim 5, wherein the diameter of said fine granular tin oxide with Sb is at most 100 Å.
References Cited (Backward Citations)
US4005928A
Cited
US4367924A
Cited
US4494824A
Cited
JPS6031119A
Cited
JPS61117524A
Cited
US5196954A
Cited
US4938569A
Cited
US4840462A
Cited
US5165076A
Cited
US4932757A
Cited
US5085498A
Cited
JPH0210326A
Cited
EP0353760A2
Cited
US5231523A
Cited
EP0374865A2
Cited
US5130830A
Cited
US5118538A
Cited
US5061044A
Cited
JPH0321920A
Cited
EP0412408A2
Cited
EP0416936A2
Cited
US5126867A
Cited
US5153755A
Cited
US5239398A
Cited
JPH04125520A
Cited
US5270844A
Cited
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) | 1997-07-04 | 1998-01-03 | 1998-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-04 | 2002-01-03 | 2002-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-04 | 2006-01-03 | 2006-07-05 | $7700.00 | Window Closed / Lapsed |