Patent ID: 8044919

Claim:
A backlight driving apparatus of a liquid crystal display, comprising: a burst dimming signal generator receiving a triangular-wave signal from an integrator and a power voltage from a system for burst dimming to generate a burst dimming signal; an analog dimming voltage generator receiving the power voltage for burst dimming to generate an analog dimming voltage; and a main controller receiving the burst dimming signal and the analog dimming voltage to generate a pulse width modulating signal which is used for generating a driving current of a backlight assembly, wherein the main controller adjusts a duty ratio of the pulse width modulating signal to have a duty ratio which is proportional to a duty ratio of the burst dimming signal which is supplied from the burst dimming signal generator and, at the same time adjusts amplitude of the pulse width modulating signal in proportion to a level of the analog dimming voltage which is supplied from the analog dimming voltage generator, wherein the burst dimming signal generator includes a comparator, wherein the power voltage for burst dimming is simultaneously inputted, via one power terminal, to the comparator and the analog dimming voltage generator.