Electrophoretic display and process for its manufacture
First Claim
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1. A process for forming an electrophoretic display, which process comprises the steps of:
- a) filling microcups with a dispersion comprising a sealing composition and an electrophoretic fluid, wherein the electrophoretic fluid comprises charged pigment particles dispersed in a dielectric solvent,b) floating the sealing composition on top of said electrophoretic fluid, andc) hardening the sealing composition to form a sealing layer to enclose said electrophoretic fluid within each of said microcups.
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Abstract
This invention relates to an electrophoretic display comprising cells which are filled with charged particles dispersed in a solvent and are individually sealed with a polymeric sealing layer.
166 Citations
19 Claims
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1. A process for forming an electrophoretic display, which process comprises the steps of:
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a) filling microcups with a dispersion comprising a sealing composition and an electrophoretic fluid, wherein the electrophoretic fluid comprises charged pigment particles dispersed in a dielectric solvent, b) floating the sealing composition on top of said electrophoretic fluid, and c) hardening the sealing composition to form a sealing layer to enclose said electrophoretic fluid within each of said microcups. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A sealing process for the manufacture of an electrophoretic display, which process comprises hardening a sealing composition on top of an electrophoretic fluid wherein said sealing composition has a specific gravity lower than that of the electrophoretic fluid.
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13. A sealing process for the manufacture of an electrophoretic display, which process comprises
a) dispersing a sealing composition in an electrophoretic fluid to form a dispersion, wherein said sealing composition has a specific gravity lower than that of the electrophoretic fluid; -
b) filling the dispersion in microcups, and c) hardening said sealing composition to form a sealing layer on top of, and in contact with, the electrophoretic fluid, to enclose said electrophoretic fluid within each of said microcups. - View Dependent Claims (14)
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15. A sealing process for the manufacture of an electrophoretic display which process comprises the steps in the order of:
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a) filling microcups with an electrophoretic fluid comprising charged pigment particles dispersed in a dielectric solvent; b) said microcups overcoating a sealing composition comprising a solvent onto the electrophoretic fluid in each of said microcups; and c) hardening said sealing composition to enclose said electronhoretic fluid within each of said microcups. - View Dependent Claims (16, 17, 18, 19)
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Specification