| US 7,511,876 B2 | ||
| Dispersion for electrophoretic display, and electrophoretic display device | ||
| Shinya Takagi, Kanagawa (Japan); and Akiko Iimura, Tochigi (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on May 27, 2003, as Appl. No. 10/445,193. | ||
| Claims priority of application No. 2002-157911 (JP), filed on May 30, 2002. | ||
| Prior Publication US 2004/0027643 A1, Feb. 12, 2004 | ||
| Int. Cl. G02B 26/00 (2006.01) | ||
| U.S. Cl. 359—296 [359/292; 359/295] | 6 Claims |
| 1. An electrophoretic display device; comprising:
a pair of substrates;
electrodes formed on the substrates;
charged electrophoretic particles held between the substrates; and
a dispersion medium, in which the charged electrophoretic particles stand dispersed and are moved by applying a voltage to
the electrodes, is disposed between the substrates,
wherein the dispersion medium contains an aliphatic hydrocarbon solvent and at least one of an ethylene acrylate copolymer
in a content of from 0.0001 part by weight to 0.3 part by weight based on 100 parts by weight of the dispersion medium and
a styrene copolymer in a content of from 0.0001 part by weight to 3 parts by weight based on 100 parts by weight of the dispersion
medium.
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