Electrophoretic display and process for its manufacture
First Claim
Patent Images
1. A process for the preparation of a semi-finished display panel, which process comprises the steps of:
- a) coating a layer of a thermoplastic, thermoset or precursor thereof on a temporary substrate layer followed by embossing the coated layer with a male mold or imagewise exposing a layer of a radiation curable composition coated on a temporary substrate layer followed by removing unexposed areas, to form an array of microcups;
b) filling the microcups with a charged pigment dispersion in a dielectric solvent or solvent mixture;
c) top-sealing the microcups; and
d) applying a conductor layer or a permanent substrate layer onto the top-sealed microcups.
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Accused Products
Abstract
This application is directed to electrophoretic displays and semi-finished display panels comprising display cells prepared from the microcup and top-sealing technologies.
101 Citations
28 Claims
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1. A process for the preparation of a semi-finished display panel, which process comprises the steps of:
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a) coating a layer of a thermoplastic, thermoset or precursor thereof on a temporary substrate layer followed by embossing the coated layer with a male mold or imagewise exposing a layer of a radiation curable composition coated on a temporary substrate layer followed by removing unexposed areas, to form an array of microcups;
b) filling the microcups with a charged pigment dispersion in a dielectric solvent or solvent mixture;
c) top-sealing the microcups; and
d) applying a conductor layer or a permanent substrate layer onto the top-sealed microcups. - View Dependent Claims (2, 3, 4, 5, 6, 25)
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7. A process for the manufacture of a semi-finished display panel, which process comprises the steps of:
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a) coating a layer of a thermoplastic, thermoset or precursor thereof on a conductor layer or a permanent substrate layer followed by embossing the coated layer with a male mold or imagewise exposing a layer of a radiation curable composition coated on a conductor layer or a permanent substrate layer followed by removing unexposed areas, to form an array of microcups;
b) filling the microcups with a charged pigment dispersion in a dielectric solvent or solvent mixture;
c) top-sealing the microcups; and
d) applying a temporary substrate layer onto the top-sealed microcups. - View Dependent Claims (8, 9, 10, 11, 12, 26)
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13. A process for the manufacture of a multi-color semi-finished display panel, which process comprises the steps of:
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a) coating a layer of a thermoplastic, thermoset or precursor thereof on a temporary substrate layer followed by embossing the coated layer with a male mold or imagewise exposing a layer of a radiation curable composition coated on a temporary substrate layer followed by removing unexposed areas, to form an array of microcups;
b) laminating or coating the microcups with a layer of positive photoresist;
c) imagewise exposing the positive photoresist to selectively open the microcups in a predetermined area;
d) filling the opened microcups with a charged pigment dispersion in a dielectric solvent or solvent mixture which comprises a dye or pigment of a first color;
e) top-sealing the microcups filled with said charged pigment dispersion in said dielectric solvent or solvent mixture of the first color;
f) repeating steps c) to e) in different areas to generate microcups filled with charged pigment dispersion in dielectric solvent or solvent mixture of different colors;
g) removing residual positive photoresist, if any; and
h) applying a conductor layer or a permanent substrate layer onto the top-sealed microcups. - View Dependent Claims (14, 15, 16, 17, 18, 27)
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19. A process for the manufacture of a multi-color semi-finished display panel, which process comprises the steps of:
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a) coating a layer of a thermoplastic, thermoset or precursor thereof on a conductor layer or a permanent substrate layer followed by embossing the coated layer with a male mold or imagewise exposing a layer of a radiation curable composition coated on a conductor layer or a permanent substrate layer followed by removing unexposed areas, to form an array of microcups;
b) laminating or coating the microcups with a layer of positive photoresist;
c) imagewise exposing the positive photoresist to selectively open the microcups in a predetermined area;
d) filling the opened microcups with a charged pigment dispersion in a dielectric solvent or solvent mixture which comprises a dye or pigment of a first color;
e) top-sealing the microcups filled with said charged pigment dispersion in said dielectric solvent or solvent mixture of the first color;
f) repeating steps c) to e) in different areas to generate microcups filled with charged pigment dispersion in dielectric solvent or solvent mixture of different colors;
g) removing residual positive photoresist, if any; and
h) applying a temporary substrate layer onto the top-sealed microcups. - View Dependent Claims (20, 21, 22, 23, 24, 28)
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Specification