Processes for the production of electrophoretic displays
First Claim
1. A process for forming a coating of an encapsulated electrophoretic medium on a conductive portion of a substrate, the process comprising:
- dispersing in a fluid a plurality of capsules each comprising a capsule wall, a suspending fluid encapsulated within the capsule wall and a plurality of electrically charged particles suspended in the suspending fluid and capable of moving therethrough on application of an electric field to the capsule;
contacting the conductive portion of the substrate with the fluid; and
applying a potential difference between the conductive portion of the substrate and a counter-electrode in electrical contact with the fluid, thereby causing capsules to be deposited upon the conductive the portion of the substrate.
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Accused Products
Abstract
A coating of an encapsulated electrophoretic medium is formed on a substrate (106) by dispersing in a fluid (104) a plurality of electrophoretic capsules (102), contacting at least a portion of a substrate (106) with the fluid (104); and applying a potential difference between at least a part of the portion of the substrate (106) contacting the fluid (104) and a counter-electrode (110) in electrical contact with the fluid (104), thereby causing capsules (102) to be deposited upon at least part of the portion of the substrate (106) contacting the fluid (102). Patterned coatings of capsules containing different colors may be deposited in registration with electrodes using multiple capsule deposition steps. Alternatively, a patterned coating may be deposited upon a substrate containing a conductive layer by varying the conductivity of the conductive layer by radiation exposure or by coating portions of the conductive layer with an insulating layer, typically a photoresist.
482 Citations
30 Claims
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1. A process for forming a coating of an encapsulated electrophoretic medium on a conductive portion of a substrate, the process comprising:
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dispersing in a fluid a plurality of capsules each comprising a capsule wall, a suspending fluid encapsulated within the capsule wall and a plurality of electrically charged particles suspended in the suspending fluid and capable of moving therethrough on application of an electric field to the capsule; contacting the conductive portion of the substrate with the fluid; and applying a potential difference between the conductive portion of the substrate and a counter-electrode in electrical contact with the fluid, thereby causing capsules to be deposited upon the conductive the portion of the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification