BACKLIGHT DRIVE BOARD AND LIQUID CRYSTAL DISPLAY

摘要

A backlight drive board (11) for driving a plurality of backlight sources (12), comprising a microprocessor (111) and a constant current drive chip (112). The microprocessor (111) is used for receiving a display mode switching signal (Vsync) and a synchronization signal (T) from a liquid crystal drive board (10), and generating a first pulse-width modulation signal (PWMl-PWMn) corresponding to the backlight sources (12) respectively in accordance with the display mode switching signal (Vsync) and the synchronization signal (T). The constant current drive chip (112) is used for controlling the operating state of the corresponding backlight sources (12) in accordance with the first pulse-width modulation signal (PWM1-PWMn). Therefore, signal lines between the backlight drive board (11) and the liquid crystal drive board (10) are reduced, and then the operating stability is improved.