Patent ID: 7800599

Claim:
A display driving device for driving a display panel accompanied with a system, comprising: a display driver for driving the display panel; a single-channel pulse width modulation circuit, receiving a logic voltage signal for powering the display panel and outputting a first voltage signal; wherein the first voltage signal is used for providing an operation voltage for the display panel when pixels are enabled; a boost-lowering voltage circuit, electrically connected between the single-channel pulse width modulation circuit and the display driver so as to provide a second voltage signal and a third voltage signal according to the first voltage signal; wherein the second voltage signal is used for enabling the pixels of the display panel, and the third voltage signal is used for turning off the pixels of the display panel; and a delay circuit, electrically connected between the single-channel pulse width modulation circuit and the display driver so as to delay the first voltage signal and provide a fourth voltage signal; wherein the fourth voltage signal is a delayed form of the first voltage signal, and the timing of the fourth voltage signal is later than that of the second and third voltage signals.