In this invention, animation effects have been obtained in a device containing a light source illuminating a linear polarizer (3) producing plane polarized light which is rotated in an electro-optical cell/cells (2) such as a modified TN or STN Liquid Crystal or PLZT cell. The angle of the plane is changed...http://www.google.com/patents/US5122890?utm_source=gb-gplus-sharePatent US5122890 - Electro-optic animated displays and indicators employing electro-optical cells and mosaic segment polarizer
