US5166126A
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US
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Color filter array element with protective overcoat layer and method of forming same
Assignee: Eastman Kodak Co
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Filing: 1992-02-19
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Granted: 1992-11-24
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Expires: 2012-02-19
Abstract
Abstract A color filter array element, preferably for use in a color electro-optical display device such as a color liquid crystal display device, comprises a support having thereon a thermally transferred image comprising a repeating pattern of colorants and, overlying the transferred image, a protective overcoat layer that is produced by polymerization of an overcoat layer containing a cycloaliphatic epoxide compound and a photoinitiator that is an onium salt of a Lewis acid.
Inventors
- 👤 Daniel J. Harrison
- 👤 Mary Catherine S. Oldfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:29
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/0005; G03F7/0007; B; B41; B41M; B41M7/00; B41M7/0045; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133514; G02F1/133519; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/24868; Y10T428/24926; Y10T428/31504; Y10T428/31507; Y10T428/31511; Y10T428/31721
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
40 words
A color filter array element comprising a support having thereon a polymeric dye image-receiving layer containing a thermally transferred image comprising a repeating pattern of colorants and, overlying said transferred image as a protective overcoat layer, a cycloaliphatic epoxide polymer.
Claim 2
Dependent Claim
40 words
A color filter array element comprising a support having thereon a polymeric dye image-receiving layer containing a thermally transferred image comprising a repeating pattern of colorants and, overlying said transferred image as a protective overcoat layer, a cycloaliphatic epoxide polymer.
Claim 3
Dependent Claim
47 words
An element of claim 1 wherein said protective overcoat layer results from polymerization of a layer containing at least about 25 weight percent of a cycloaliphatic epoxide compound and at least about 4 weight percent of an initiator which is an onium salt of a Lewis acid.
Claim 4
Dependent Claim
12 words
An element of claim 2 wherein said cycloaliphatic epoxide compound is 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexylcarboxylate.
Claim 5
Dependent Claim
17 words
The element of claim 2 wherein said onium salt is a triarylsulfonium hexafluoroantimonate or a triarylsulfonium hexafluorophosphate.
Claim 6
Dependent Claim
16 words
The element of claim 1 which is adapted for use in a color electro-optical display device.
Claim 7
Dependent Claim
24 words
The element of claim 5 further comprising a transparent conducting layer over said transferred image and a polymeric alignment layer over said conducting layer.
Claim 8
Dependent Claim
18 words
The element of claim 6 wherein said polymeric alignment layer contains a polyimide coated from a butyrolactone solution.
Claim 9
Dependent Claim
24 words
The element of claim 1 wherein said polymeric dye image-receiving layer comprises a polycarbonate having a glass transition temperature greater than about 200° C.
Claim 10
Dependent Claim
12 words
The element of claim 8 wherein said polycarbonate is derived from 4,4'-(hexahydro-4,7-methanoindan-5-ylidene)bisphenol.
Claim 11
Dependent Claim
23 words
The element of claim 1 wherein said pattern is a mosaic pattern of a set of red, green, and blue additive primary colorants.
Claim 12
Dependent Claim
16 words
The element of claim 1 wherein said thermally transferred image comprises one or more sublimable dyes.
Claim 13
Dependent Claim
10 words
The element of claim 1 wherein said support is glass.
Claim 14
Dependent Claim
19 words
The element of claim 1 wherein said protective overcoat layer contains 1,4-butanediol diglycidyl ether or bisphenol A diglycidyl ether.
Claim 15
Independent Claim
109 words
A method of forming a color filter array element which comprises (a) imagewise heating a dye-donor element comprising a support having thereon a dye layer, said donor element being in contact with a dye-receiving element comprising a transparent support having thereon a polymeric dye image-receiving layer, and thereby (b) transferring portions of said dye layer to said dye-receiving element to form a repeating mosaic pattern of dyes thereon, (c) coating over said pattern of dyes on said dye-receiving element a Photopolymerizable overcoat layer containing a cycloaliphatic epoxide compound and, as a polymerization initiator, an onium salt of a Lewis acid, and (d) irradiating said photopolymerizable layer with ultraviolet radiation.
Claim 16
Independent Claim
109 words
A method of forming a color filter array element which comprises (a) imagewise heating a dye-donor element comprising a support having thereon a dye layer, said donor element being in contact with a dye-receiving element comprising a transparent support having thereon a polymeric dye image-receiving layer, and thereby (b) transferring portions of said dye layer to said dye-receiving element to form a repeating mosaic pattern of dyes thereon, (c) coating over said pattern of dyes on said dye-receiving element a Photopolymerizable overcoat layer containing a cycloaliphatic epoxide compound and, as a polymerization initiator, an onium salt of a Lewis acid, and (d) irradiating said photopolymerizable layer with ultraviolet radiation.
Claim 17
Dependent Claim
32 words
The method of claim 14 wherein said photopolymerizable overcoat layer contains at least about 25 weight percent of said cycloaliphatic epoxide compound and at least about 4 weight percent of said initiator.
Claim 18
Dependent Claim
12 words
The method of claim 15 wherein said cycloaliphatic epoxide compound is 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexylcarboxylate.
Claim 19
Dependent Claim
18 words
The method of claim 16 wherein said overcoat layer contains at least about 95 weight percent of 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexylcarboxylate.
Claim 20
Dependent Claim
17 words
The method of claim 14 wherein said onium salt is a triarylsulfonium hexafluoroantimonate or a triarylsulfonium hexafluorophosphate.
Claim 21
Dependent Claim
19 words
The method of claim 14 wherein said photopolymerizable overcoat layer is coated over the dye-receiving element by spin coating.
Claim 22
Dependent Claim
20 words
The method of claim 14 wherein said photopolymerizable overcoat layer is coated over said pattern of dyes by screen printing.
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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) | 1995-11-24 | 1996-05-25 | 1996-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-24 | 2000-05-25 | 2000-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-24 | 2004-05-25 | 2004-11-24 | $7700.00 | Window Closed / Lapsed |