OUTPUT BUFFER CONTROLLER OF SOURCE DRIVER FOR DRIVING LIQUID CRYSTAL DISPLAY DEVICE

摘要

PURPOSE: An output buffer controller of a source driver for driving a liquid crystal display device is provided to improve the block defect of the liquid crystal display panel due to the deviation of the output times between the source drivers. CONSTITUTION: An output buffer controller of a source driver for driving a liquid crystal display device includes a counter(100), a share switching control(200) and an image switching control(300). The counter(100) generates the share switching control signal(3) and the output switching signal(4) inverted by a predetermined number of main clock period corresponding to the predetermined first input signal. The share switching control(200) receives the share switching control signal(3), changes the share switching control signal(3) into the signal to increase the capability of the current driving of the share voltage output pass gate connected to the source line of the liquid crystal panel and outputs the changed share switching control signal(3). And, the image switching control(300) generates the signal increasing the current driving capability so as to drive the switching of the image signal output pass gate connected to the source line of the liquid panel corresponding to the second input signal of the output switching control signal and outputs the generated signal.