Color filter array for liquid crystal display device
First Claim
Patent Images
1. A method for producing a display device which comprises forming an array of display electrodes on a surface of a first panel;
- forming an array of colored filter elements on either side of said first panel in register with said array of display electrodes;
forming a counter electrode on a second panel;
disposing the first and second panels spaced apart from one another with the display electrodes facing the counter electrode; and
confining display material between the spaced first and second panels;
wherein at least one of said panels and the electrode or electrodes on said panel is transparent and wherein said colored filter elements are formed by;
(A) providing a colored photosensitive element which comprises, in order;
(i) a substrate having a release surface; and
(ii) a photosensitive layer on said release surface, which photosensitive layer comprises a light sensitive component selected from the group consisting of negative working, polymeric diazonium compounds, positive working quinone diazide compounds; and
photopolymerizable compositions; and
a resinous binder composition, which composition contains a major amount of at least one resin selected from the the group consisting of a polyvinyl butyral polymer, a polyvinyl alcohol/vinyl acetate/vinyl acetal terpolymer and a styrene-maleic anhydride copolymer half ester; and
at least one colorant; and
(iii) an adhesive layer directly adhered to said colored photosensitive layer, which adhesive layer comprises a polyvinyl acetate polymer or vinyl acetate containing copolymer and which adhesive layer has a softening point in the range of from about 60°
C. to about 180°
C.; and
(B) either(i) laminating said element with heat and pressure via said adhesive layer to one side of said first panel and removing said substrate by the application of peeling forces; and
imagewise exposing said photosensitive layer to actinic radiation;
or(ii) imagewise exposing said photosensitive layer to actinic radiation; and
laminating said element with heat and pressure via said adhesive layer to one side of first panel; and
removing said substrate by the application of peeling forces;
or(iii) laminating said element with heat and pressure via said adhesive layer to one side of said first panel; and
imagewise exposing said photosensitive layer to actinic radiation; and
removing said substrate by the application of peeling forces; and
then(C) removing the non-image areas of said photosensitive layer with a liquid developer, which removing is conducted at a temperature at which said adhesive layers are substantially non-tacky; and
thereafter(D) optionally repeating steps A through C at least once whereby another photosensitive element having at least one different colorant is laminated onto one side of said first panel over the non-removed portions of the previously laminated photosensitive layer or layers.
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Abstract
A liquid crystal display having display filter elements in registration with display electrodes. The filters are produced using color proofing films which are imaged to produce a regular pattern of dots. Filter elements are illuminated by electrodes selection to produce changeable images.
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Citations
20 Claims
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1. A method for producing a display device which comprises forming an array of display electrodes on a surface of a first panel;
- forming an array of colored filter elements on either side of said first panel in register with said array of display electrodes;
forming a counter electrode on a second panel;
disposing the first and second panels spaced apart from one another with the display electrodes facing the counter electrode; and
confining display material between the spaced first and second panels;
wherein at least one of said panels and the electrode or electrodes on said panel is transparent and wherein said colored filter elements are formed by;(A) providing a colored photosensitive element which comprises, in order; (i) a substrate having a release surface; and (ii) a photosensitive layer on said release surface, which photosensitive layer comprises a light sensitive component selected from the group consisting of negative working, polymeric diazonium compounds, positive working quinone diazide compounds; and
photopolymerizable compositions; and
a resinous binder composition, which composition contains a major amount of at least one resin selected from the the group consisting of a polyvinyl butyral polymer, a polyvinyl alcohol/vinyl acetate/vinyl acetal terpolymer and a styrene-maleic anhydride copolymer half ester; and
at least one colorant; and(iii) an adhesive layer directly adhered to said colored photosensitive layer, which adhesive layer comprises a polyvinyl acetate polymer or vinyl acetate containing copolymer and which adhesive layer has a softening point in the range of from about 60°
C. to about 180°
C.; and(B) either (i) laminating said element with heat and pressure via said adhesive layer to one side of said first panel and removing said substrate by the application of peeling forces; and
imagewise exposing said photosensitive layer to actinic radiation;
or(ii) imagewise exposing said photosensitive layer to actinic radiation; and
laminating said element with heat and pressure via said adhesive layer to one side of first panel; and
removing said substrate by the application of peeling forces;
or(iii) laminating said element with heat and pressure via said adhesive layer to one side of said first panel; and
imagewise exposing said photosensitive layer to actinic radiation; and
removing said substrate by the application of peeling forces; and
then(C) removing the non-image areas of said photosensitive layer with a liquid developer, which removing is conducted at a temperature at which said adhesive layers are substantially non-tacky; and
thereafter(D) optionally repeating steps A through C at least once whereby another photosensitive element having at least one different colorant is laminated onto one side of said first panel over the non-removed portions of the previously laminated photosensitive layer or layers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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11. The method of claim 1 wherein said photosensitive layer comprises one or more ingredients selected from the group consisting of plasticizers, acid stabilizers, antistatic compositions, uv absorbers, dyes, pigments and surfactants.
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12. The method of claim 1 wherein said adhesive layer of the photosensitive element further comprises a plasticizer.
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13. The method of claim 1 wherein each of said panels are transparent.
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14. The method of claim 1 wherein said first and second panels comprise a material selected from the group consisting of glass polyester, cellulose acetate esters, polycarbonate, polyacrylic, polyvinyl resins, olefinic resins and polysiloxane resin.
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15. The method of claim 1 wherein the laminating step is conducted at a temperature of from about 60°
- C. to about 90°
C.
- C. to about 90°
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16. The method of claim 1 further comprising the subsequent step of attaching a polarizer to each of said first and second panels.
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17. The method of claim 1 wherein each of said panels and electrodes are transparent.
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18. The method of claim 1 wherein said electrodes comprise tin dioxide or indium tin dioxide.
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19. The method of claim 1 wherein said display material is a liquid crystal material.
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20. A display device produced by the method of claim 1.
- forming an array of colored filter elements on either side of said first panel in register with said array of display electrodes;
Specification