US4906074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
FLC liquid crystal electro-optical device having microdomains within pixels
Assignee: Semiconductor Energy Laboratory Co Ltd
•
Filing: 1988-09-28
•
Granted: 1990-03-06
•
Expires: 2008-09-28
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
2026-10-30 14:03
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: 3
Claim 1
Independent Claim
128 words
A liquid crystal device comprising: a pair of substrates; a chiral smectic liquid crystal layer 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; and an orientation control surface formed on at least one inside surface of said substrates, wherein said liquid crystal layer is composed of a material conforming to the formula, ##STR4## where R 1 is a hydrocarbon, and R 2 is a hydrocarbon comprising at least two asymmetric carbon atoms, whereby each region consists of a plurality of individual micro-domains in each of which liquid crystal molecules are aligned in accordance with one direction which is different from adjacent micro-domains contiguous thereto.
Claim 2
Dependent Claim
128 words
A liquid crystal device comprising: a pair of substrates; a chiral smectic liquid crystal layer 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; and an orientation control surface formed on at least one inside surface of said substrates, wherein said liquid crystal layer is composed of a material conforming to the formula, ##STR4## where R 1 is a hydrocarbon, and R 2 is a hydrocarbon comprising at least two asymmetric carbon atoms, whereby each region consists of a plurality of individual micro-domains in each of which liquid crystal molecules are aligned in accordance with one direction which is different from adjacent micro-domains contiguous thereto.
Claim 3
Dependent Claim
18 words
The device of claim 1 wherein R 1 is --C 8 H 18 and R 2 comprises ##STR5##
References Cited (Backward Citations)
US4563059A
Cited
US4780241A
Cited
US4796980A
Cited
US4765720A
Cited
US4818429A
Cited
US4824597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-05 | 1993-09-04 | 1994-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-05 | 1997-09-04 | 1998-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-05 | 2001-09-04 | 2002-03-06 | $7700.00 | Window Closed / Lapsed |