Patent ID: 7439947

Claim:
A driving circuit for controlling a display panel comprising a plurality of display units, respectively connected to corresponding data and gate lines, the display panel driving circuit comprising: a data driver outputting video signals to the data lines; a first gate driver coupled to a first terminal of each gate line for outputting a first signal to the corresponding gate lines; and a second gate driver coupled to a second terminal of each gate line for outputting a second signal to the corresponding gate lines, wherein at least one of the first gate driver and the second gate driver generates an internally shifted signal based upon an external clock signal and determines the output of the shifted signal according to the external clock signal and the internally shifted signal, and wherein each of the first gate driver and the second gate driver comprises: a plurality of shift-registers receiving a plurality of external clock signals, wherein each of the shift-registers outputs the internally shifted signal according to a corresponding clock signal among the external clock signals; and a plurality of detection devices, each detecting one shift-register and comprising a first terminal receiving the internally shifted signal output from a corresponding shift-register and a second terminal receiving the corresponding clock signal, wherein when the logic level of the internally shifted signal and that of the corresponding clock signal are different, the corresponding detection device does not output the shifted signal to the gate lines, and when the logic level of the internally shifted signal and that of the corresponding clock signal are the same, the corresponding detection device outputs the shifted signal to the gate lines.