Patent ID: 7390901

Claim:
An electrophoretic dispersion comprising charged pigment particles dispersed in a fluorinated solvent, wherein said fluorinated solvent comprises a fluorinated perylene dye or colorant expressed by the following Formula (IV): wherein: m, n, p and q are independently 0-2; X is O, S or NR wherein R is hydrogen, alkyl, heteroalkyl, aryl, heteroaryl or a halogenated derivative of alkyl, heteroalkyl, aryl, heteroaryl or R f -A- in which R f and A are defined below; R 1 s are independently hydrogen, alkyl, heteroalkyl, aryl, heteroaryl or a halogenated derivative of alkyl, heteroalkyl, aryl or heteroaryl; or R 1 is R f -A- wherein R f and A are defined below; R 2 s are independently hydrogen, halogen, alkyl, heteroalkyl, aryl, heteroaryl or a halogenated derivative of alkyl, heteroalkyl, aryl or heteroaryl, R′O—, R′S—, R′R″N—, R′C(O)—, R′OC(O)—, R′C(O)—, R′C(O)NR″—, R′R″NC(O)—, R′NHC(O)NR″—, R′SO 2 NR″— or R′R″NSO 2 — in which R′ and R″ are independently hydrogen, alkyl, heteroalkyl, aryl, heteroaryl or a halogenated derivative of alkyl, heteroalkyl, aryl or heteraryl; or R 2 s are independently R f -A- wherein R f and A are defined below; R f is a fluorinated alkyl, fluorinated heteroalkyl, fluorinated aryl or fluorinated heteroaryl or a low/medium molecular weight fluorinated polymeric or oligomeric moiety; and A is absent or a linking chain comprising one or more of the following, connected together: —O—, —S—, —SO—, —SO 2 , —SO 2 NR′—, —NR′—, —NR′CO—, —NR′COO—, —NR′CONR″—, —NR′CS—, —NR′CSO—, —NR′CSNR″—, —OC(O)—, —OC 2 —, —C(O)O—, —OC(O)N′R—, alkylene, arylene, and a halogenated derivative of alkylene or arylene, wherein R′ and R″ are as defined above, wherein the fluorinated perylene dye or colorant comprises at least about 25% by weight of fluorine.