US4726659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device having different alignment layers
Assignee: RCA Corp
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Filing: 1986-02-24
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Granted: 1988-02-23
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Expires: 2006-02-24
Abstract
Abstract A display device, such as an LCD, has alignment layers made of different materials; thus one layer can have a low curing temperature so as not to cause damage to delicate organic layers, such as a color filter, during curing, while the other layer can have a larger tilt angle so as to minimize ambiguities in the liquid crystal material.
Inventors
- 👤 Neal D. Conrad
- 👤 Sandra K. McClelland
- 👤 William R. Roach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:58
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133514; G02F1/1337; G02F1/133711
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
41 words
A display device comprising: first and second opposing substrates having first and second electrodes respectively thereon; and first and second alignment layers overlying said first and second electrodes, respectively, each of said first and second alignment layers comprising a different material.
Claim 2
Dependent Claim
41 words
A display device comprising: first and second opposing substrates having first and second electrodes respectively thereon; and first and second alignment layers overlying said first and second electrodes, respectively, each of said first and second alignment layers comprising a different material.
Claim 3
Dependent Claim
12 words
The device of claim 1, wherein said substrates comprise a transparent material.
Claim 4
Dependent Claim
13 words
The device of claim 1, wherein said electrodes comprise a transparent conductive layer.
Claim 5
Dependent Claim
13 words
The device of claim 1, wherein said alignment layers have different cure temperatures.
Claim 6
Dependent Claim
19 words
The device of claim 4, further comprising a color filter adjacent the alignment layer having the lower cure temperature.
Claim 7
Dependent Claim
21 words
The device of claim 4, wherein said first alignment layer comprises a polyimide and said second alignment layer comprises an organosilane.
Claim 8
Dependent Claim
15 words
The device of claim 1, further comprising a liquid crystal material disposed between said substrates.
Claim 9
Dependent Claim
22 words
The device of claim 1, further comprising a pair of polarizing layers adjacent said substrates, respectively, on the surface opposite said electrodes.
References Cited (Backward Citations)
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US4165922A
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US4128313A
Cited
US4277144A
Cited
US4247174A
Cited
US4381886A
Cited
US4437731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-22 | 1991-08-24 | 1992-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-22 | 1995-08-24 | 1996-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-22 | 1999-08-24 | 2000-02-23 | $7700.00 | Window Closed / Lapsed |