Patent ID: 7764761

Claim:
A shift register apparatus, disposed on a glass substrate of an LCD panel, the shift register apparatus comprising: a plurality of shift registers, connected in serial, and each of the shift registers comprising: a first transistor, having a first drain/source receiving a first clock signal, a gate receiving a first control signal, and a second drain/source generating a scan signal; a second transistor, having a first drain/source electrically connected to the second drain/source of the first transistor, a gate receiving a second clock signal, and a second drain/source receiving the first clock signal, wherein a phase difference between the first clock signal and the second clock signal is 180 degrees; a third transistor, having a first drain/source electrically connected to the second drain/source of the first transistor, a gate receiving a second control signal, and a second drain/source receiving a low level gate voltage; an energy storage device, having a first terminal electrically connected to the gate of the first transistor and a second terminal electrically connected to the second drain/source of the first transistor, the first drain/source of the second transistor and the first drain/source of the third transistor; and a control unit, for generating the first control signal and the second control signal according to the first clock signal, the second clock signal, the low level gate voltage and a start signal, wherein, each of the shift registers utilizes the first transistor to pull up a voltage level of the scan signal to a high level gate voltage, and separately utilizes the second transistor and the third transistor to pull down the voltage level of the scan signal to the low level gate voltage during a frame period.