Composition and process for the sealing of microcups in roll-to-roll display manufacturing
First Claim
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1. A composition suitable for sealing electrophoretic cells, which composition comprises:
- a) a solvent or solvent mixture which is immiscible with the display fluid contained within the cells and exhibits a specific gravity less than that of the display fluid, and b) a thermoplastic elastomer.
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Abstract
The invention relates to a novel sealing composition for the manufacture of an electrophoretic or liquid crystal display, and a sealing process using the composition. The composition allows electrophoretic or liquid crystal cells to be seamlessly sealed and the sealing layer free of any defects.
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Citations
31 Claims
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1. A composition suitable for sealing electrophoretic cells, which composition comprises:
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a) a solvent or solvent mixture which is immiscible with the display fluid contained within the cells and exhibits a specific gravity less than that of the display fluid, and b) a thermoplastic elastomer. - View Dependent Claims (2, 3, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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- 4. The composition of claim I wherein said solvent or solvent mixture is selected from a group consisting of alkanes, cyclic alkanes, alkylbenzenes, alkyl esters and C3-5 alkyl alcohols.
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16. A sealing process for the preparation of electrophoretic display, which process comprises:
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a) filling an array of microcups with an electrophoretic fluid;
b) overcoating the electrophoretic fluid with a sealing composition comprising;
a solvent or solvent mixture which is immiscible with the display fluid contained within the cells and exhibits a specific gravity less than that of the display fluid, thermoplastic elastomer; and
c) allowing the sealing composition to dry to form a sealing layer.
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Specification