Backlight driving circuit capable of adjusting brightness of a lamp not only according to an adjustment of user, but also according to gray level voltages of a display image

摘要

A backlight driving circuit includes a brightness controller, a timing controller, and a logic calculation circuit. The brightness controller is configured to provide a first control signal to the logic calculation circuit, the timing controller is configured to provide a second control signal to the logic calculation circuit, and the logic calculation circuit is configured to select the first or second control signal to adjust a brightness of a lamp.