DISPLAY DRIVER INTEGRATED CIRCUIT FOR USING SAMPLE AND HOLD CIRCUIT OF PING-PONG TYPE

摘要

PURPOSE: A display driver integrated circuit for using a sample and a hold circuit of a ping-pong type is provided to secure enough sampling time while minimizing the increase of the driving area of a display driver integrated circuit. CONSTITUTION: A display driving circuit is composed of a data counter, a comparison unit, a gradation voltage generation part, and a sample and hold circuit(350). The data counter response to a clock signal, and it outputs a first or n-th gamma data. The comparison unit outputs a comparison signal of input video data with each gamma data. The gradation voltage generation part response to first or n-th gamma data, and the gradation voltage generation part generates the first or n-th gradation voltage. The sample and hold circuit include the first sub sample and the hold circuit(710) and the second sub sample and hold circuit(750).