Patent ID: 8229058
Filing Date: 2012-07-24
Classification: G09G,G11C

Abstract:
1. A shift register comprising a plurality of serially-coupled shift register units, an Nth stage shift register unit among the plurality of shift register units comprising: an input end for receiving an input voltage; an output end for outputting an output voltage; a first node; a pull-up driving circuit for transmitting the input voltage to the first node; a pull-up circuit for providing the output voltage according to a first clock signal and the input voltage; a first pull-down circuit for providing a first voltage at the first node or at the output end according to a second clock signal, comprising: a second pull-down circuit for providing a second voltage at the first node or at the output end according to a third clock signal, comprising: a third pull-down circuit for providing a third voltage at the first node or at the output end according to a feedback voltage.