Patent US5317434A successfully refreshed from Google Patents.
US5317434A
Expired / Lapsed
US
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Color filter structure for liquid crystal displays with seal end on or surrounded by orientation film
Assignee: Seiko Epson Corp
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Filing: 1991-07-12
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Granted: 1994-05-31
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Expires: 2011-07-12
Abstract
Abstract A structure provides for encapsulating a color filter in a planarized protective coating, forming a transparent electrode on the planar surface of the protective coating and forming an orientation film over the transparent electrode wherein the orientation film extends beyond the boundary defined by the seal between the two substrates of a liquid crystal device. The seal itself can be attached at one of its ends to the orientation film, or it can be attached at one of its ends to a portion of the transparent electrode such that that end is surrounded by the abutting orientation film. In both of the seal attachment schemes the other end of the seal is attached directly to one of the substrates. Typically the substrates are glass substrates.
Inventors
- 👤 Hiroshi Ohara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:52
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G02B; G02B5/00; G02B5/20
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
127 words
A liquid crystal display apparatus comprising: a) a first substrate; b) a color filter; c) a protective layer; d) a transparent electrode; e) a first orientation film; f) at least one seal; and g) a second substrate; wherein said color filter is disposed upon a surface of said first substrate, said protective layer is formed on said first substrate over said color filter, said transparent electrode is formed on top of said protective layer, said first orientation film is formed on top of said transparent electrode such that a portion of said transparent electrode remains exposed, said seal is mounted on said first orientation film offset laterally inward from an edge of said first orientation film and said second substrate extends beyond the position of said seal.
Claim 2
Dependent Claim
127 words
A liquid crystal display apparatus comprising: a) a first substrate; b) a color filter; c) a protective layer; d) a transparent electrode; e) a first orientation film; f) at least one seal; and g) a second substrate; wherein said color filter is disposed upon a surface of said first substrate, said protective layer is formed on said first substrate over said color filter, said transparent electrode is formed on top of said protective layer, said first orientation film is formed on top of said transparent electrode such that a portion of said transparent electrode remains exposed, said seal is mounted on said first orientation film offset laterally inward from an edge of said first orientation film and said second substrate extends beyond the position of said seal.
Claim 3
Dependent Claim
11 words
The apparatus of claim 1 wherein said color filter is flattened.
Claim 4
Dependent Claim
11 words
The apparatus of claim 1 wherein said protective layer is planarized.
Claim 5
Dependent Claim
15 words
The apparatus of claim 1 wherein said protective layer is comprise of an acrylic resin.
Claim 6
Dependent Claim
18 words
The apparatus of claim 1 wherein said protective layer is comprised of an ultraviolet photosensitive epoxy acrylate resin.
Claim 7
Dependent Claim
13 words
The apparatus of claim 1 wherein said transparent electrode is comprised of indium-tin-oxide.
Claim 8
Dependent Claim
26 words
The apparatus of claim 1 wherein said first orientation layer is comprised of a material selected from the group consisting of preimide, polyamic acid and polyamide-imide.
Claim 9
Dependent Claim
14 words
The apparatus of claim 1 wherein said first orientation layer is comprised of polyimide.
Claim 10
Dependent Claim
13 words
The apparatus of claim 1 wherein said first substrate is a glass substrate.
Claim 11
Dependent Claim
13 words
The apparatus of claim 1 wherein said second substrate is a glass substrate.
Claim 12
Dependent Claim
28 words
The apparatus of claim 1, wherein said first orientation film extends beyond said second substrate by an amount in the range of approximately 0.5 mm to 1.0 mm.
Claim 13
Dependent Claim
165 words
A liquid crystal display apparatus comprising: a) a first substrate; b) a color filter; c) a protective layer; d) a transparent electrode; e) a first orientation film; f) at least one seal; and g) a second substrate; wherein said color filter is disposed upon a surface of said first substrate, said protective layer is formed on said first substrate over said color filter, said transparent electrode is formed on top of said protective layer, said first orientation film is formed on top of said transparent electrode such that a portion of said transparent electrode remains exposed, said seal is mounted on said transparent electrode such that said first orientation layer abuts one end of said seal, said second substrate is mounted on top of said seal such that a portion of said second substrate extends beyond the position of said seal, and wherein said first orientation film extends beyond said second substrate by an amount in the range of approximately 0.5 mm to 1.0 mm.
Claim 14
Dependent Claim
165 words
A liquid crystal display apparatus comprising: a) a first substrate; b) a color filter; c) a protective layer; d) a transparent electrode; e) a first orientation film; f) at least one seal; and g) a second substrate; wherein said color filter is disposed upon a surface of said first substrate, said protective layer is formed on said first substrate over said color filter, said transparent electrode is formed on top of said protective layer, said first orientation film is formed on top of said transparent electrode such that a portion of said transparent electrode remains exposed, said seal is mounted on said transparent electrode such that said first orientation layer abuts one end of said seal, said second substrate is mounted on top of said seal such that a portion of said second substrate extends beyond the position of said seal, and wherein said first orientation film extends beyond said second substrate by an amount in the range of approximately 0.5 mm to 1.0 mm.
Claim 15
Dependent Claim
11 words
The apparatus of claim 12 wherein said color filter is flattened.
Claim 16
Dependent Claim
11 words
The apparatus of claim 12 wherein said protective layer is planarized.
Claim 17
Dependent Claim
15 words
The apparatus of claim 12 wherein said protective layer is comprise of an acrylic resin.
Claim 18
Dependent Claim
18 words
The apparatus of claim 12 wherein said protective layer is comprised of an ultraviolet photosensitive epoxy acrylate resin.
Claim 19
Dependent Claim
13 words
The apparatus of claim 12 wherein said transparent electrode is comprised of indium-tin-oxide.
Claim 20
Dependent Claim
26 words
The apparatus of claim 12 wherein said first orientation layer is comprised of a material selected from the group consisting of preimide, polyamic acid and polyamide-imide.
Claim 21
Dependent Claim
14 words
The apparatus of claim 12 wherein said first orientation layer is comprised of polyimide.
Claim 22
Dependent Claim
13 words
The apparatus of claim 12 wherein said first substrate is a glass substrate.
Claim 23
Dependent Claim
13 words
The apparatus of claim 12 wherein said second substrate is a glass substrate.
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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) | 1997-05-30 | 1997-11-29 | 1998-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-30 | 2001-11-29 | 2002-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-30 | 2005-11-29 | 2006-05-31 | $7700.00 | Window Closed / Lapsed |