Patent ID: 6650463
Filing Date: 2003-11-18
Classification: G02F

Abstract:
An electrophoretic display device, comprising:an electrophoretic suspension containing electrophoretic particles dispersed in a dispersion medium; wherein the dispersion medium includes at least one organic compound, the at least one organic compound comprising at least one material defined by any of the following formulae: X1-A1-B1-A2-Y1â€ƒX3-C1 X4-C2-B4-A6-Y3 â€ƒwherein each of A1 to A6 comprises at least one of a benzene ring, a cyclohexane ring, a dioxane ring, a pyrimidine ring, a furan ring, a tetrahydrofuran ring, a dithiane ring, a piperidine ring, a pyrazine ring, a morpholine ring, a cyclopentane ring, a cyclobutane ring, a pyridine ring, a thiophene ring, a pyrrole ring, or a cyclohexene ring; wherein each of X1 to X4, Y1 to Y3, and Z comprises at least one substituent selected from the group consisting of hydrogen, fluorine, chlorine, bromine, iodine, cyano, nitro, amino, hydroxyl, alkanoyloxy, alkoxycarbonyl, carboxy, trifluoromethyl, trifluoromethoxy, alkoxymethylene, alkyl, alkoxy, alkenyl, sulfonate, thioalkyl, monoalkylamino, dialkylamino, and trialkylamino; wherein each of B1 to B4 is either a single bond compound or comprises one of the following: COO, OCO, CH&boxH;N, N&boxH;CH, CH&boxH;CH, (CH2)nO, O(CH2)n, (CH2)n, O(CH2)nO, CH&boxH;CHâ€”COO, OCOâ€”CH&boxH;CH, O, CO, NHCO, CONH, N&boxH;N, N2O, Câ‰¡C, SO, SO2, or NH, where n is an integer from 1 to 10; and wherein each of C1 and C2 comprises naphthalene, tetrahydronaphthalene, decahydronaphthalene, indene, quinoline, coumarin, azulene, fluorene, or dihydrophenanthrene.