Patent US5612801A successfully refreshed from Google Patents.
US5612801A
Expired / Lapsed
US
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Monolithic optical compensation device for improved viewing angle in liquid crystal displays
Assignee: Teledyne Scientific and Imaging LLC
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Filing: 1994-09-30
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Granted: 1997-03-18
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Expires: 2014-09-30
Abstract
Abstract A monolithic O-plate optical compensator device, in accordance with the invention, comprises a plurality of thin-film compensation layers which are deposited on a single substrate. As used herein, the term "monolithic" is meant to imply that the O-plate and other thin-film compensator layers are formed by depositing (e.g., via solvent casting or vacuum deposition) one layer on top of another layer; with or without the use of surface modification treatments such as adhesion layers, alignment layers, and the like.
Inventors
- 👤 Bruce K. Winker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:53
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/13363; G02F1/133636; C; C23; C23C; C23C14/00; C23C14/22; C23C14/225; C23C14/226; G02B; G02B5/00; G02B5/30; G02B5/3083; G02F1/133632; G02F1/133634; G02F2413/00; G02F2413/10; G02F2413/105
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
A monolithic compensator for a liquid crystal display comprising: (a) a first deposited thin-film compensator layer having a first surface; (b) a second thin-film compensator layer deposited onto said first surface of said first compensator layer, wherein each of said first and said second deposited thin-film compensator layers are selected from the group consisting of (i) a positively birefringent O-plate compensator layer, (ii) a positively birefringent A-plate compensator layer, (iii) a negatively birefringent A-plate compensator layer, and (iv) a negatively birefringent C-plate compensator layer.
Claim 2
Dependent Claim
84 words
A monolithic compensator for a liquid crystal display comprising: (a) a first deposited thin-film compensator layer having a first surface; (b) a second thin-film compensator layer deposited onto said first surface of said first compensator layer, wherein each of said first and said second deposited thin-film compensator layers are selected from the group consisting of (i) a positively birefringent O-plate compensator layer, (ii) a positively birefringent A-plate compensator layer, (iii) a negatively birefringent A-plate compensator layer, and (iv) a negatively birefringent C-plate compensator layer.
Claim 3
Dependent Claim
30 words
The monolithic compensator of claim 1, wherein one or more thin-film layers of material are deposited between said first deposited thin-film compensator layer and said second deposited thin-film compensator layer.
Claim 4
Dependent Claim
23 words
The monolithic compensator of claim 2, wherein at least one of said one or more thin-film layers is a deposited thin-film compensator layer.
Claim 5
Dependent Claim
75 words
A liquid crystal display comprising: (a) a polarizer layer; (b) an analyzer layer; (c) a liquid crystal cell having a first transparent substrate and a second transparent substrate forming respective walls of said liquid crystal cell, said liquid crystal cell disposed between said polarizer layer and said analyzer layer; and (d) a monolithic compensator in accordance with a specified one of claims 1, 2, or 3 disposed between said polarizer layer and said analyzer layer.
Claim 6
Dependent Claim
38 words
A compensator element for a liquid crystal display comprising: (a) an optically transparent substrate; and (b) a monolithic compensator in accordance with a specified one of claims 1, 2, and 3, operatively coupled to a optically transparent substrate.
Claim 7
Dependent Claim
15 words
The compensator element of claim 5, wherein said optically transparent substrate is an optical polarizer.
Claim 8
Dependent Claim
19 words
The compensator element of claim 5, wherein said optically transparent substrate is one surface of a liquid crystal cell.
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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) | 2000-03-17 | 2000-09-16 | 2001-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-17 | 2004-09-16 | 2005-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-03-17 | 2008-09-16 | 2009-03-18 | $7700.00 | Window Closed / Lapsed |