www.google.dehttp://www.google.de/patents/US3697150?utm_source=gb-gplus-sharePatent US3697150 - ELECTRO-OPTIC SYSTEMS IN WHICH AN ELECTROPHORETIC-LIKE OR DIPOLAR MATERIAL IS DISPERSED THROUGHOUT A LIQUID CRYSTAL TO REDUCE THE TURN-OFF TIME
ELECTRO-OPTIC SYSTEMS IN WHICH AN ELECTROPHORETIC-LIKE OR DIPOLAR MATERIAL ...
