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US 7,112,114 B2Granted
Electrophoretic display and process for its manufacture
AssigneeSiPix Imaging, Inc.
InventorsRong-Chang Liang, Xiaojia Wang, Hongmei Zang
Life of this patent
Estimating the term…
Abstract
This application is directed to electrophoretic displays and semi-finished display panels comprising display cells prepared from the microcup and top-sealing technologies.
Claims26
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 with a sealing composition having a specific gravity lower than that of said dielectric solvent or solvent mixture;
- and
- d) applying a conductor layer or a permanent substrate layer onto the top-sealed microcups.
2 more elements
A process for the manufacture 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 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 with a sealing composition having a specific gravity lower than that of said dielectric solvent or solvent mixture;
- and
- d) applying a temporary substrate layer onto the top-sealed microcups.
2 more elements
A process for the manufacture of a multi-color 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) laminating or coating the microcups with a layer of a 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.
6 more elements
A process for the manufacture of a multi-color semi-finished display panel, which process comprises the steps of:
- 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 a 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.
6 more elements
Dependencies are inferred from the claim text.