Patent US4240710A successfully refreshed from Google Patents.
US4240710A
Expired / Lapsed
US
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Holding plate for a twisted nematic alignment field effect mode (TNFEM) liquid crystal display
Assignee: Sharp Corp
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Filing: 1978-08-31
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Granted: 1980-12-23
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Expires: 1998-08-31
Abstract
Abstract An alignment structure provided in a twisted nematic field effect mode (TN-FEM) liquid crystal display includes, a first insulating layer deposited substantially along the normal direction of one of the supports, a second insulating layer deposited on said first insulating layer in a direction slant to the normal direction of the support, and a third insulating layer deposited on the second insulating layer slant to a direction rotated ninety degrees from said direction while the normal line of the support serves as the rotation axis thereof, thereby providing a three-layer alignment structure.
Inventors
- 👤 Syuichi Kozaki
- 👤 Kiyoshi Toda
- 👤 Fumiaki Funada
- 👤 Tomio Wada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:07
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02F1/133734
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
134 words
A holding plate for a twisted nematic field effect mode liquid crystal display comprising: a support; conductive electrodes formed on said support; a SiO 2 layer formed over said support and said conductive electrodes; a first SiO layer formed on said SiO 2 layer, said first SiO layer being slant deposited at a first acute angle from the plane of said support and from a first direction along the plane of said support; and a second SiO layer formed on said first SiO layer, said second SiO layer being slant deposited at a second acute angle from the plane of said support and from a second direction along the plane of said support, said second acute angle being smaller than said first acute angle, said second direction being substantially normal to said first direction.
Claim 2
Dependent Claim
134 words
A holding plate for a twisted nematic field effect mode liquid crystal display comprising: a support; conductive electrodes formed on said support; a SiO 2 layer formed over said support and said conductive electrodes; a first SiO layer formed on said SiO 2 layer, said first SiO layer being slant deposited at a first acute angle from the plane of said support and from a first direction along the plane of said support; and a second SiO layer formed on said first SiO layer, said second SiO layer being slant deposited at a second acute angle from the plane of said support and from a second direction along the plane of said support, said second acute angle being smaller than said first acute angle, said second direction being substantially normal to said first direction.
Claim 3
Dependent Claim
29 words
The holding plate of claim 1 wherein the total thickness of said SiO 2 layer and said first and second S i O layers is greater than 1000 A.
Claim 4
Dependent Claim
16 words
The holding plate of claim 1 wherein said SiO 2 layer is approximately 1000 A thick.
Claim 5
Dependent Claim
23 words
The holding plate of claim 3 wherein said SiO 2 layer is deposited in a direction normal to the plane of the support.
Claim 6
Dependent Claim
24 words
The holding plate of claim 1 or 4 wherein the total thickness of said first and second SiO layers is less than 500 A.
Claim 7
Dependent Claim
19 words
The holding plate of claim 1 wherein said first SiO layer is between 10 A and 500 A thick.
Claim 8
Dependent Claim
17 words
The holding plate of claim 1 wherein said second SiO layer is less than 30 A thick.
Claim 9
Dependent Claim
19 words
The holding plate of claim 6 wherein said first acute angle is in the range of 30° to 45°.
Claim 10
Dependent Claim
19 words
The holding plate of claim 7 wherein said second acute angle is in the range of 5° to 10°.
Claim 11
Dependent Claim
14 words
The holding plate of claim 8 wherein said first acute angle is approximately 30°.
Claim 12
Dependent Claim
16 words
The holding plate of claim 10 wherein said first SiO layer is approximately 25 A thick.
Claim 13
Dependent Claim
16 words
The holding plate of claim 9 wherein said second SiO layer is approximately 5 A thick.
Claim 14
Dependent Claim
172 words
A twisted nematic field effect mode liquid crystal display well comprising: a pair of supports having conductive electrodes formed thereon; a liquid crystal material including a plurality of liquid crystal molecules disposed between said supports; and an alignment structure formed on each of said pair of supports for ensuring uniform alignment of the liquid crystal molecules, said structure including; a SiO 2 layer formed over one of said supports and said conductive electrodes; a first SiO layer formed on said SiO 2 layer, said first SiO layer being slant deposited at first acute angle from the plane of said support and from a first direction along the plane of said support; and a second SiO layer formed on said first SiO layer, said second SiO layer being slant deposited at a second acute angle from the plane of said support and from a second direction along the plane of said support, said second acute angle being smaller than said first acute angle, said second direction being substantially normal to said first direction.
Claim 15
Dependent Claim
172 words
A twisted nematic field effect mode liquid crystal display well comprising: a pair of supports having conductive electrodes formed thereon; a liquid crystal material including a plurality of liquid crystal molecules disposed between said supports; and an alignment structure formed on each of said pair of supports for ensuring uniform alignment of the liquid crystal molecules, said structure including; a SiO 2 layer formed over one of said supports and said conductive electrodes; a first SiO layer formed on said SiO 2 layer, said first SiO layer being slant deposited at first acute angle from the plane of said support and from a first direction along the plane of said support; and a second SiO layer formed on said first SiO layer, said second SiO layer being slant deposited at a second acute angle from the plane of said support and from a second direction along the plane of said support, said second acute angle being smaller than said first acute angle, said second direction being substantially normal to said first direction.
Claim 16
Dependent Claim
26 words
The display of claim 13 wherein the total thickness of said SiO 2 layer and said first and second SiO layer is greater than 1000 A.
Claim 17
Dependent Claim
15 words
The display of claim 13 wherein said SiO 2 layer is approximately 1000 A thick.
Claim 18
Dependent Claim
22 words
The display of claim 15 wherein said SiO 2 layer is deposited in a direction normal to the plane of the support.
Claim 19
Dependent Claim
23 words
The display of claim 13 or 16 wherein the total thickness of said first and second SiO layers is less than 500 A.
Claim 20
Dependent Claim
18 words
The display of claim 13 wherein said first SiO layer is between 10 A and 500 A thick.
Claim 21
Dependent Claim
16 words
The display of claim 13 wherein said second SiO layer is less than 30 A thick.
Claim 22
Dependent Claim
18 words
The display of claim 18 wherein said first acute angle is in the range of 30° to 45°.
Claim 23
Dependent Claim
18 words
The display of claim 19 wherein said second acute angle is in the range of 5° to 10°.
Claim 24
Dependent Claim
13 words
The display of claim 20 wherein said first acute angle is approximately 30°.
Claim 25
Dependent Claim
15 words
The display of claim 22 wherein said first SiO layer is approximately 25 A thick.
Claim 26
Dependent Claim
15 words
The display of claim 21 wherein said second SiO layer is approximately 5 A thick.
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) | 1983-12-23 | 1984-06-23 | 1984-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-23 | 1988-06-23 | 1988-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-23 | 1992-06-23 | 1992-12-23 | $7700.00 | Window Closed / Lapsed |