Patent EP0545650A1 successfully refreshed from Google Patents.
US5496498A
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Compensator for liquid crystal display
Assignee: Eneos Corp
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Filing: 1994-12-16
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Granted: 1996-03-05
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Expires: 2014-12-16
Abstract
Abstract A compensator for an active matrix type liquid crystal display using a thin film transistor is provided. The compensator is made by a film of a liquid crystalline polymer which exhibits a twisted nematic orientation in a liquid crystal state and assumes a glassy state at temperatures below a liquid crystal transition point thereof, the constituent molecules of the liquid crystalline polymer film having a helical structure with a helical axis wherein the twist angle is in the range of 70 to 150 degrees, and the product Δn·d of birefringence Δn of the liquid crystalline polymer film and film thickness,d, being in the range of 0.2 to 3.0 μm.
Inventors
- 👤 Takehiro Toyooka
- 👤 Shigeki Iida
- 👤 Hiroyuki Itoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:32
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/13363; G02F1/133636; C; C09; C09K; C09K19/00; C09K19/02; C09K19/0208; C09K19/04; C09K19/38; C09K19/3833; C09K19/3842; C09K19/3852; C09K19/3866
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
129 words
A compensator for liquid crystal display of an active matrix type constituted by a film of a liquid crystalline polymer which exhibits a twisted nematic orientation in a liquid crystal state and assumes a glassy state at temperatures below a liquid crystal transition point thereof, the constituent molecules of said liquid crystalline polymer film having a helical structure with a helical axis wherein the twist angle is in the range of 70 to 150 degrees, and the product Δn·d of birefringence Δn of the liquid crystalline polymer film and the film thickness d being in the range of 0.2 to 3.0 μn, and wherein the constituent molecules of the liquid crystalline polymer fill are selected from the group consisting of polyesters, polyamides, polycarbonates, polyesterimides, polyacrylates, polymethacrylates, polymalonates, and polysiloxanes.
Claim 2
Dependent Claim
129 words
A compensator for liquid crystal display of an active matrix type constituted by a film of a liquid crystalline polymer which exhibits a twisted nematic orientation in a liquid crystal state and assumes a glassy state at temperatures below a liquid crystal transition point thereof, the constituent molecules of said liquid crystalline polymer film having a helical structure with a helical axis wherein the twist angle is in the range of 70 to 150 degrees, and the product Δn·d of birefringence Δn of the liquid crystalline polymer film and the film thickness d being in the range of 0.2 to 3.0 μn, and wherein the constituent molecules of the liquid crystalline polymer fill are selected from the group consisting of polyesters, polyamides, polycarbonates, polyesterimides, polyacrylates, polymethacrylates, polymalonates, and polysiloxanes.
Claim 3
Dependent Claim
91 words
A compensator for liquid crystal display of an active matrix type comprising a light transmitting base, an alignment fill formed on said base, and a film of a liquid crystalline polymer formed on said alignment film, said liquid crystalline polymer exhibiting a twisted nematic orientation in a liquid crystal state and assuming a glassy state at temperatures below a liquid crystal transition point thereof, and wherein the constituent molecules of the liquid crystalline polymer fill are selected from the group consisting of polyesters, polyamides, polycarbonates, polyesterimides, polyacrylates, polymethacrylates, polymalonates, and polysiloxanes.
Claim 4
Dependent Claim
91 words
A compensator for liquid crystal display of an active matrix type comprising a light transmitting base, an alignment fill formed on said base, and a film of a liquid crystalline polymer formed on said alignment film, said liquid crystalline polymer exhibiting a twisted nematic orientation in a liquid crystal state and assuming a glassy state at temperatures below a liquid crystal transition point thereof, and wherein the constituent molecules of the liquid crystalline polymer fill are selected from the group consisting of polyesters, polyamides, polycarbonates, polyesterimides, polyacrylates, polymethacrylates, polymalonates, and polysiloxanes.
Claim 5
Dependent Claim
75 words
A compensator as set forth in claim 2, wherein the constituent molecules of said liquid crystalline polymer film have a helical structure with a helical axis in a direction perpendicular to said base, with a twist angle thereof being in the range of 70 to 150 degrees, and the product Δn·d of birefringence of Δn of the liquid crystalline polymer film and the film thickness d is in the range of 0.2 to 3.0 μm.
Claim 6
Dependent Claim
37 words
A compensator according to claim 1, wherein the liquid crystalline polymer comprises a mixture of a nematic liquid crystalline polymer and an optically active low molecular weight liquid crystalline compound or an optically active liquid crystalline polyester.
Claim 7
Dependent Claim
21 words
A compensator according to claim 4, wherein the optically active compound constitutes between 0.1% and 30% by weight of said mixture.
Claim 8
Dependent Claim
21 words
A compensator according to claim 5, wherein the optically active compound constitutes between 0.3% and 20% by weight of said mixture.
Claim 9
Dependent Claim
19 words
A compensatory according to claim 1, wherein the twist angle is in the range of 80 to 120 degrees.
Claim 10
Dependent Claim
22 words
A compensator according to claim 1, wherein the product of said birefringence and said film thickness is between 0.3 and 2.5 μm.
Claim 11
Dependent Claim
26 words
A compensator according to claim 1, wherein the liquid crystalline polymer consists of a mixture of a nematic liquid crystalline polymer and an optically active compound.
Claim 12
Dependent Claim
21 words
A compensator according to claim 9, wherein the optically active compound constitutes between 0.1% and 30% by weight of said mixture.
Claim 13
Dependent Claim
21 words
A compensator according to claim 10, wherein the optically active compound constitutes between 0.3% and 20% by weight of said mixture.
Claim 14
Dependent Claim
19 words
A compensator according to claim 3, wherein the twist angle is in the range of 80 and 120 degrees.
Claim 15
Dependent Claim
22 words
A compensator according to claim 3, wherein the product of said birefringence and said film thickness is between 0.3 and 2.5 μm.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1999-03-05 | 1999-09-04 | 2000-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-05 | 2003-09-04 | 2004-03-05 | $3760.00 | Window Closed / Lapsed |
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