Patent ID: 7015893
Filing Date: 2006-03-21
Classification: G02F,G09G

Abstract:
1. An electrophoretic display comprising: a first wall; and a second light transmissive wall spaced from the first wall; one or more bodies of liquid located between the first wall and the second wall; a plurality of first cohesive bodies that are light reflective and are characterized by electrophoretic mobility of a particular sign suspended In at least a subset of the one or more bodies of liquid; a plurality of second cohesive bodies that are photoluminescent and are characterized by electrophoretic mobility of the particular sign suspended in at least a subset of the one or more bodies of liquid; one or more electrodes located proximate the one or more bodies of liquid for imagewise application of electric fields to the one or more bodies of liquid; and a source of radiation capable of exciting photoluminescence of the plurality of second cohesive bodies optically coupled to the plurality of second cohesive bodies, wherein the liquid is transmissive of radiation capable of exciting photoluminescence of the second cohesive bodies, and blocks radiation emitted by photoluminescence of the second cohesive bodies, and wherein the liquid comprises nigrosin.