Patent ID: 7992063
Filing Date: 2011-08-02
Classification: G09G,G11C

Abstract:
1. A control circuit for use in a liquid crystal display (LCD), comprising: a plurality of shift register stages electrically connected to each other in series, each shift register stage receiving a first clock signal and a second clock signal and outputting an output signal respectively according to the first and the second clock signals, the output signal being used as a driving signal of a next shift register stage, each shift register stage comprising: wherein the clear signal is a driving signal outputted from another shift register stage which is apart from the shift register stage by a predetermined interval, the clear signal is used to releasing the residual charges of the second transistor during a period when the LCD inputs a frame signal, and wherein each shift register comprises an N+1th stage output signal pull-down circuit for releasing the residual charges of the second transistor by connecting the second transistor to the low voltage level through the N+1th stage output signal pull-down circuit when an N+1th stage output signal is in the high voltage level.