Patent ID: 7508247

Claim:
A source drive circuit for driving a display panel, comprising: a line latch, for receiving a display data input signal and a first timing sequence signal, said line latch latching said display data input signal according to said first timing sequence signal and outputting an original input signal; a latchable voltage level shifter, coupled to said line latch, for receiving said original input signal and a second timing sequence signal including a first phase control signal and a second phase control signal, said first phase control signal includes a first clock signal and a second clock signal, said latchable voltage level shifter including a voltage level shifter for receiving said original input signal and generating a high voltage signal according to a timing sequence of said first phase control signal and a high voltage flip-flop coupled to said voltage level shifter for receiving said high voltage signal and said second phase control signal, latching said high voltage signal according to a timing sequence of said second phase control signal and outputting said high voltage signal; a digital-to-analog converter, coupled to said latchable voltage level shifter, for receiving said high voltage signal and converting said high voltage signal to output a first drive signal corresponding to said high voltage signal; and an amplifier, coupled to said digital-to-analog converter and said display panel, for receiving said first drive signal and enhancing a driving ability of said first drive signal to output a second drive signal to drive said display panel.