Patent ID: 7095392
Filing Date: 2006-08-22
Classification: G09G

Abstract:
1. A master/slave brightness controller for an LCD panel display, comprising: an optical sensor generating a signal indicative of ambient light around said LCD panel; a micro controller controlling said optical sensor to generate said signal indicative of ambient light around said LCD panel, said micro controller is also adapted to generate said signal indicative of ambient light around said LCD panel independently of a host system CPU; a look-up table receiving said signal indicative of ambient light around said LCD panel and adapted to generate a target panel brightness level signal based on said signal indicative of ambient light around said LCD panel; a low frequency PWM circuit capable of generating a burst mode signal having a pulse width based on said target panel brightness signal; and an inverter circuit adapted to control power delivered to said LCD panel based on, at least in pan, said burst mode signal; said inverter circuit is also adapted to control power delivered to said LCD panel independently of a host system CPU.