Disclosed are circuits and user interfaces of a mobile communication device that include a light source and a shutter that are driven by at least one common voltage line. Also disclosed are circuits and user interfaces of a mobile communication device that include a sensor and a shutter that are driven...http://www.google.ca/patents/US7953438?utm_source=gb-gplus-sharePatent US7953438 - Common circuits and user interfaces for shutters and electro-optical components
