SHIFT REGISTER AND DRIVING CIRCUIT FOR LIQUID CRYSTAL DISPLAY

摘要

A shift register for an LCD display includes N shift register units. Each shift register unit outputs a shift signal. An Nth shift register unit includes a waveform-shaping unit electrically coupled to an shift signal output terminal of the Nth register to perform a waveform-shaping operation on the Nth shift signal according to the (N+1)th shift signal output by an (N+1)th shift register, to reduce the feed-through effect which causes display flicker.

主权项

1. A shift register comprising:
a plurality of shift register units, each shift register unit outputting a shift signal, an Nth shift register unit comprising: a staring unit electrically coupled to an (N−1)th shift register and outputting a first driving signal according to an (N−1)th shift signal output by an (N−1)th shift register; a pull-up unit electrically coupled between the staring unit and a shift signal output terminal of the Nth shift register unit and pulling up an Nth shift signal output by an Nth shift register according to the first driving signal and a first clock signal; a pull-down unit electrically coupled between the starting unit and a shift signal output terminal of the Nth shift register unit and pulling down the first driving signal; a control unit electrically coupled between the starting unit and the pull-down unit to control a working time of the pull-down unit according to an (N+2)th shift signal, a first control signal, and a second control signal; and a waveform-shaping unit electrically coupled to the shift signal output terminal of the Nth register to perform a waveform-shaping operation on the Nth shift signal according to the (N+1)th shift signal.