Patent ID: 7277218
Filing Date: 2007-10-02
Classification: C09B,G02F

Abstract:
1. A method for improving threshold characteristics and temperature latitude of an electrophoretic display, which method comprises a) preparing an electrophoretic dispersion comprising electrophoretic pigment-containing microparticles dispersed in a dielectric solvent or solvent mixture wherein said electrophoretic pigment-containing microparticles are prepared from microencapsulation having a continuous phase which comprises a protective colloid; and b) adding into said electrophoretic dispersion one or more fluorinated additives represented by the following formulas (A-1), (A-2), (B-1), (B-2) and (B-3): wherein: n is an integer which is ≧1; m is 0 or an integer which is ≧1; R X, X′ and X″ are independently absent or a linking group; A, A′ and A″ are independently —O—, —C(O)O—, —O(O)C—, —C(O)NR B, B′ and B″ are independently hydrogen, N≡, optionally substituted alkyl, optionally substituted aryl, optionally substituted heteroalkyl or optionally substituted heteroaryl; or N and R