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US5109293A
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Method of manufacturing ferroelectric liquid crystal display element
Assignee: Citizen Holdings Co Ltd
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Filing: 1990-02-26
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Granted: 1992-04-28
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Expires: 2010-02-26
Abstract
Abstract Disclosed in a ferroelectric liquid crystal display element in which oblique alignment layers are inclined with respect to a substrate surface and have opposite inclination directions which are formed on opposing surfaces of a pair of substrates having transparent electrodes. A ferroelectric liquid crystal is sandwiched between the substrates. The liquid crystal is injected into the space between the substrates only in a direction opposite to the inclination direction of the oblique alignment layers.
Inventors
- 👤 Masaaki Matsunaga
- 👤 Hiroshi Maruyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:36
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1341; G02F1/137; G02F1/139; G02F1/141; G02F1/1337; G02F1/133734
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
87 words
A method of manufacturing a ferroelectric liquid crystal display element comprising a pair of substrates each having transparent electrodes thereon, and ferroelectric liquid crystal sandwiched between said substrates; each of said substrates having an oblique alignment layer on an inside opposing surface thereof, said layers being inclined with respect to a substrate surface and having opposite inclination directions characterized in that said liquid crystal is injected into the space between said two substrates only in a direction opposite to the inclination direction of the oblique alignment layers.
Claim 2
Independent Claim
87 words
A method of manufacturing a ferroelectric liquid crystal display element comprising a pair of substrates each having transparent electrodes thereon, and ferroelectric liquid crystal sandwiched between said substrates; each of said substrates having an oblique alignment layer on an inside opposing surface thereof, said layers being inclined with respect to a substrate surface and having opposite inclination directions characterized in that said liquid crystal is injected into the space between said two substrates only in a direction opposite to the inclination direction of the oblique alignment layers.
Claim 3
Dependent Claim
15 words
A method according to claim 1, wherein said oblique alignment layers are columns of micro-structure.
Claim 4
Dependent Claim
23 words
A method according to claim 2, wherein said columns consist of one of substances SiO, Al 2 O 3 and MgF 2 .
Claim 5
Independent Claim
123 words
A method for reducing misalignment regions of large area ferroelectric liquid crystal displays comprising: providing an upper and a lower substrate disposed so as to form a gap between said substrates; sealing said gap with an epoxy seal; providing transparent electrodes on the inner surface of each of said substrates, said electrodes having a thickness of approximately 1,000Å; providing an alignment layer on the inner surface of each said substrate; said alignment layer having a plurality of oblique columns; said columns having a thickness of approximately 800Å; injecting a ferroelectric liquid crystal material through said seal only in a direction that is substantially opposite to the direction of incline of said oblique columns whereby a stable and substantially uniform aligning direction is defined.
Claim 6
Independent Claim
123 words
A method for reducing misalignment regions of large area ferroelectric liquid crystal displays comprising: providing an upper and a lower substrate disposed so as to form a gap between said substrates; sealing said gap with an epoxy seal; providing transparent electrodes on the inner surface of each of said substrates, said electrodes having a thickness of approximately 1,000Å; providing an alignment layer on the inner surface of each said substrate; said alignment layer having a plurality of oblique columns; said columns having a thickness of approximately 800Å; injecting a ferroelectric liquid crystal material through said seal only in a direction that is substantially opposite to the direction of incline of said oblique columns whereby a stable and substantially uniform aligning direction is defined.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-04-28 | 1995-10-28 | 1996-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-28 | 1999-10-28 | 2000-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-28 | 2003-10-28 | 2004-04-28 | $7700.00 | Window Closed / Lapsed |