Patent ID: 7746314
Filing Date: 2010-06-29
Classification: G09G

Abstract:
1. A shift register unit for receiving an input signal and generating a scan driving signal according to the input signal, the shift register unit comprising: a first switch having a first input terminal, a first control terminal, and a first output terminal; a second switch having a second input terminal, a second control terminal, and a second output terminal, wherein the second control terminal is coupled to the first output terminal; and a level shift circuit coupled to the second control terminal and the second output terminal, the level shift circuit comprising: wherein, during a first time period, the first switch is enabled, the first input terminal receives the input signal converting the voltage of the second control terminal into a first voltage for turning on the second switch; wherein, during a second time period, the second control terminal is substantially maintained at the first voltage, the second input terminal receives the first clock signal, the second output terminal outputs the first clock signal to a scan signal line; wherein, during a third time period, the first level shift module is enabled for converting the voltage of the second control terminal and the voltage of the second output terminal into a second voltage for turning off the second switch; wherein, after the third time period, the second level shift module and the third level shift module are alternately enabled to substantially maintain the voltage of the second control terminal and the voltage of the second output terminal at the second voltage.