LCD panel signal processor

An LCD panel signal processor for an LCD panel having a gate driver and a source driver, comprising:

• an input interface for receiving plural video signal types;
• a micro-processing device for outputting a first control signal, instructing the input interface to select a first type video signal from the plural video signal types, converting the first type video signal into a digital video signal having an output format, and simultaneously sending an information signal comprising the output format;
• wherein the micro-processing device comprises a pulse-width-modulation-signal-generating device, for generating a pulse-width-modulation signal;
• a panel controller for receiving the information signal to receive the digital video signal according to the output format, and generating a first gate/source driver signal set for the gate driver and the source driver;
• and
• a power distributor, for generating at least a direct current power source, wherein the power distributor is coupled to the pulse-width-modulation-signal-generating device to control the voltage value of the direct current power source via the pulse-width-modulation signal wherein said direct current power sources are further fed back to said micro-processing device, to change the pulse width of said pulse-width-modulation signal according to the voltage value of said direct current power source.