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US5011270A
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US
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Liquid crystal electro-optical device and manufacturing method therefor
Assignee: Semiconductor Energy Laboratory Co Ltd
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Filing: 1990-03-06
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Granted: 1991-04-30
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Expires: 2010-03-06
Abstract
Abstract A liquid crystal display comprises a pair of substrates provided with an electrode arrangement in matrix form. A chiral smectic C phase liquid crystal material is interposed between the substrates. In the liquid crystal layer, each pixel consists of a number of micro-domains which can be compared to polycrystal line structures. Interaction between adjacent pixels through well ordered liquid crystal structure is suppressed by virtue of the micro-domains.
Inventors
- 👤 Shunpei Yamazaki
- 👤 Masahiko Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:50
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/20; C09K19/2007; C09K19/2021; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/137; G02F1/139; G02F1/141
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
115 words
A liquid crystal device comprising: a pair of substrates; a chiral smectic liquid crystal interposed between said substrates; an electrode arrangement provided for defining a plurality of cell regions in said liquid crystal layer in array form and for applying an electric field to each region; an orientation control surface formed at least one inside surface of said substrates; wherein said each region consists of a plurality of micro-domains each of which forms a lozenge having two diagonals, the length of one of said diagonals is not more than 450 microns and not less than 200 microns, and the length of another diagonal is not more than 25 microns and not less than 8 microns.
Claim 2
Dependent Claim
115 words
A liquid crystal device comprising: a pair of substrates; a chiral smectic liquid crystal interposed between said substrates; an electrode arrangement provided for defining a plurality of cell regions in said liquid crystal layer in array form and for applying an electric field to each region; an orientation control surface formed at least one inside surface of said substrates; wherein said each region consists of a plurality of micro-domains each of which forms a lozenge having two diagonals, the length of one of said diagonals is not more than 450 microns and not less than 200 microns, and the length of another diagonal is not more than 25 microns and not less than 8 microns.
Claim 3
Dependent Claim
35 words
The device of claim 1 wherein said liquid crystal layer contains a material conforming to the formula, ##STR4## where R1 is a hydrocarbon, and R2 is a hydrocarbon comprising at least two asymmetric carbon atoms.
Claim 4
Dependent Claim
24 words
The device of claim 1 wherein the opposed inner surfaces of said substrates contiguous to said liquid crystal layer are formed of different material.
Claim 5
Dependent Claim
18 words
The device of claim 1 wherein the opposed inner surfaces of said substrates are rubbed in different directions.
Claim 6
Dependent Claim
15 words
The device of claim 1 wherein one of said surfaces of said substrates are rubbed.
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) | 1994-04-29 | 1994-10-29 | 1995-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-29 | 1998-10-29 | 1999-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-29 | 2002-10-29 | 2003-04-30 | $7700.00 | Window Closed / Lapsed |