US5523128A
Expired / Lapsed
US
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Liquid crystal display device
Assignee: JNC Corp
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Filing: 1994-09-28
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Granted: 1996-06-04
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Expires: 2014-09-28
Abstract
Abstract A liquid crystal display device comprises a pair of substrates, a transparent electrode formed on each of the substrates, an orientation film covering the transparent electrode and a liquid crystal sealedly sandwiched between the pair of substrates, wherein the orientation film comprises a polyimide which is formed by a condensation polymerization of 2,2-bis[4-(4-aminophenoxy)phenyl]propane as an amine component and 1,2,4,5-benzenetetracarboxylic dianhydride as an carboxylic acid component, and is subjected to a uniaxial orientation treatment, and the liquid crystal has a smectic layer structure with its bending direction which is aligned with the direction of the uniaxial orientation treatment.
Inventors
- 👤 Nobuyuki Itoh
- 👤 Masami Kido
- 👤 Shizuo Murata
- 👤 Yukino Abe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:34
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1046; C08G73/105; G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/307; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133711; G02F1/133723; C09; C09K; C09K2323/00; C09K2323/02; C09K2323/023; C09K2323/027; G02F1/137; G02F1/139; G02F1/141; G02F1/1416
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
96 words
A liquid crystal display device comprising a pair of substrates, a transparent electrode formed on each of the substrates, an orientation film covering the transparent electrode and a liquid crystal sealedly sandwiched between the pair of substrates, wherein the orientation film comprises a polyimide which is formed by a condensation polymerization of 2,2-bis[4-(4-aminophenoxy)phenyl)propane as an amine component and 1,2,4,5-benzenetetracarboxylic dianhydride as an carboxylic acid component, and is subjected to a uniaxial orientation treatment, and wherein the liquid crystal has a smectic layer structure having a bending direction aligned with the direction of the uniaxial orientation treatment.
Claim 2
Dependent Claim
96 words
A liquid crystal display device comprising a pair of substrates, a transparent electrode formed on each of the substrates, an orientation film covering the transparent electrode and a liquid crystal sealedly sandwiched between the pair of substrates, wherein the orientation film comprises a polyimide which is formed by a condensation polymerization of 2,2-bis[4-(4-aminophenoxy)phenyl)propane as an amine component and 1,2,4,5-benzenetetracarboxylic dianhydride as an carboxylic acid component, and is subjected to a uniaxial orientation treatment, and wherein the liquid crystal has a smectic layer structure having a bending direction aligned with the direction of the uniaxial orientation treatment.
Claim 3
Dependent Claim
34 words
The liquid crystal display device of claim 1, wherein a direction of the uniaxial orientation of the orientation film covering the transparent electrode formed on each of the pair of substrates is the same.
Claim 4
Dependent Claim
31 words
The liquid crystal display device of claim 1, wherein the polyimide film is formed by the condensation polymerization in addition with a small amount of 1-amino-4-trimethoxysilylbenzene as a further amine component.
Claim 5
Dependent Claim
39 words
The liquid crystal display device of claim 3, wherein the amount of 1-amino-4-trimethoxysilylbenzene satisfies in a molar ratio defined by the formulas: ##EQU3## wherein A, B and C represent molar ratio of 1,2,4,5-benzenetetracarboxylic dianhydride, 2,2-bis(4-(4-aminophenoxy)phenyl]propane and 1-amino-4-trimethoxysilyl benzene, respectively.
References Cited (Backward Citations)
JPS56107216A
Cited
JPS6256933A
Cited
JPS62280824A
Cited
EP0282254A2
Cited
JPS6424234A
Cited
JPS6459389A
Cited
EP0415447A1
Cited
EP0540829A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-06-04 | 1999-12-04 | 2000-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-06-04 | 2003-12-04 | 2004-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-06-04 | 2007-12-04 | 2008-06-04 | $7700.00 | Window Closed / Lapsed |