US Patent 7038653 Shift resister and liquid crystal display having the same

In a shift register and an LCD having the same, the shift register includes stages having odd stages for receiving a first clock signal and even stages for receiving a second clock signal and all stages receive a control signal. Each of the stages includes a pull-up section for providing one of first and second clock signals to an output terminal, a pull-down section for providing a first power voltage to the output terminal, a pull-up driving section for turning on/off the pull-up section in response to the control signal, a first pull-down driving section for outputting a second control signal, and a second pull-down driving section for turning off the pull-down section in response to the input signal and turning on the pull-down section in response to the second control signal.