BIDIRECTIONAL SHIFTING REGISTER UNIT, BIDIRECTIONAL SHIFTING REGISTER, AND DISPLAY DEVICE

摘要

Disclosed are a bidirectional shifting register unit, a bidirectional shifting register, and a display device. The bidirectional shifting register unit has a pull-up module comprising a capacitor unit and TFTs, wherein one end of the capacitor unit is connected with an output node at a corresponding level, and the other end of the capacitor unit is connected with a pull-up node. The bidirectional shifting register unit also comprises two TFTs that can be exchanged as a precharge control unit and a reset control unit when scanning directions are different. The bidirectional shifting register unit also comprises a pull-down module which is used for pulling down electric potentials of the output node at the corresponding level and the pull-up node during a pull-down stage, wherein the pull-down module comprises a first pull-down submodule and a second pull-down submodule which work in turn during the pull-down stage. The present invention prolongs the service life of the bidirectional shifting register unit.