Graded contrast enhancing layer for use in displays
First Claim
1. A display comprising a substrate, an inactive area comprising at least one conductive layer, and an active area comprising an electrically modulated imaging layer comprising an electrically modulated imaging material, and at least one graded contrast enhancing matrix layer, wherein said graded contrast enhancing matrix layer comprises a light absorbing material, wherein said graded contrast enhancing matrix layer has a refractive index, wherein the imaginary part of said refractive index increases with distance from said substrate, and the change in said imaginary part of said refractive index through the thickness of said graded contrast enhancing matrix layer is greater than 0.2, wherein said graded contrast enhancing matrix layer registers with at least a portion of said inactive area and extends into said active area.
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Abstract
The present invention relates to a display, and a method for making the display, comprising a substrate, an inactive area comprising at least one conductive layer, an active area comprising an electrically modulated imaging layer comprising an electrically modulated imaging material, and at least one graded contrast enhancing matrix layer wherein the graded contrast enhancing matrix layer comprises a light absorbing material, wherein the graded contrast enhancing matrix layer has a refractive index, wherein the imaginary part of the refractive index increases with distance from the substrate, and the change in the imaginary part of the refractive index through the thickness of the graded contrast enhancing matrix layer is greater than 0.2, wherein the graded contrast enhancing matrix layer registers with at least a portion of the inactive area and extends into said active area.
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Citations
43 Claims
- 1. A display comprising a substrate, an inactive area comprising at least one conductive layer, and an active area comprising an electrically modulated imaging layer comprising an electrically modulated imaging material, and at least one graded contrast enhancing matrix layer, wherein said graded contrast enhancing matrix layer comprises a light absorbing material, wherein said graded contrast enhancing matrix layer has a refractive index, wherein the imaginary part of said refractive index increases with distance from said substrate, and the change in said imaginary part of said refractive index through the thickness of said graded contrast enhancing matrix layer is greater than 0.2, wherein said graded contrast enhancing matrix layer registers with at least a portion of said inactive area and extends into said active area.
- 38. A display comprising, in order, a transparent substrate, a graded contrast enhancing matrix layer matched to the index of refraction of said transparent substrate and becoming gradually more absorbing as one proceeds within said graded contrast enhancing matrix layer away from said transparent substrate, a transparent dielectric fluid layer comprising a dielectric fluid divided into cells by a plurality of spacers, wherein said spacers maintain a gap for containing said dielectric fluid between said transparent substrate and an upper insulating layer, a middle insulating and reflection layer, and a bottom substrate layer, wherein said graded contrast enhancing matrix layer comprises a light absorbing material, wherein said graded contrast enhancing matrix layer has a refractive index, wherein the imaginary part of said refractive index increases with distance from said substrate, and the change in said imaginary part of said refractive index through the thickness of said graded contrast enhancing matrix layer is greater than 0.2, wherein said graded contrast enhancing matrix layer is between said transparent substrate and said transparent dielectric fluid layer, registers with at least a portion of said spacers and extends into at least a portion of said dielectric fluid.
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40. A method of making a display comprising:
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a. providing a substrate;
b. applying at least one patterned, graded contrast enhancing matrix layer thereon, wherein said graded contrast enhancing matrix layer comprises a light absorbing material, wherein said graded contrast enhancing matrix layer has a refractive index, wherein the imaginary part of said refractive index increases with distance from said substrate, and the change in said imaginary part of said refractive index through the thickness of said graded contrast enhancing matrix layer is greater than 0.2, wherein said graded contrast enhancing matrix layer registers with at least a portion of the inactive area of said display and extends into the active area of said display;
c. applying an inactive area comprising at least one conductive layer; and
d. applying an active area comprising an electrically modulated imaging layer comprising an electrically modulated imaging material. - View Dependent Claims (41, 42, 43)
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Specification