The invention features an electrophoretic display element. The display element includes an electrophoretic display medium, an optical biasing element to modify an optical characteristic of the electrophoretic display element, and an addressing electrode to address the electrophoretic display medium....http://www.google.de/patents/US20030011560?utm_source=gb-gplus-sharePatent US20030011560 - Electrophoretic display comprising optical biasing element
