Patent ID: 9064592
Filing Date: 2015-06-23
Classification: G09G,G11C

Abstract:
1. A shift register including a plurality of shift register units at a plurality of stages, wherein the shift register unit at each stage includes: a first Thin Film Transistor (TFT) for charging or discharging a pulling-up node under the control of a driving input signal and a scanning direction selection signal, wherein the first TFT serves as a start switch of the shift register unit at the stage to charge the pulling-up node during a forward scanning driving and serves as a reset switch of the shift register unit at the stage to discharge the pulling-up node during a reverse scanning driving; a second TFT for charging or discharging the pulling-up node under the control of a first reset signal and the scanning direction selection signal, wherein the second TFT serves as a reset switch of the shift register unit at the stage to discharge the pulling-up node during a forward scanning driving and serves as a start switch of the shift register unit at the stage to charge the pulling-up node during a reverse scanning driving; a reset unit for resetting the pulling-up node and an output terminal; a pulling-up unit for pulling up a potential at the output terminal during an outputting phase; and a reset control unit configured to ensure that the output terminal is reset by the reset unit; wherein, a gate of the first TFT is connected to an input terminal, a source of the first TFT is connected to the pulling-up node, a drain of the first TFT is connected to a first scanning direction selection signal input terminal; and a gate of the second TFT is connected to a first reset signal input terminal, a source of the second TFT is connected to the pulling-up node, and a drain of the second TFT is connected to the first scanning direction selection signal input terminal; wherein the reset control unit includes: a first reset control TFT having a gate connected to the first reset signal input terminal, a source connected to a low level and a drain connected to the output terminal; and a second reset control TFT having a gate connected to the input terminal, a source connected to the low level and a drain connected to the output terminal.