SHIFT REGISTER TO REDUCE FALSE MOVEMENT FROM THE CHANGE OF TRANSISTOR'S THRESHOLD AND LIQUID CRYSTAL DRIVING CIRCUIT USING IT

摘要

The present invention is a liquid crystal drive circuit to reduce the stress applied to the transistor, does not suppress the threshold variations of the transistor, and over time a display defect by using a shift register and a shift register for reducing the malfunction due to threshold variation occurs to provide a. ; A shift register of the present invention is dependent has a plurality of stages connected, the phase is subjected to a shift operation of the output signal by the other plurality of clock input to each stage is input a signal from the front end diodes and the voltage of the input signal and maintaining the charge of the level condenser, being on / off controlled by the held voltage level, the first transistor in synchronization with a clock for outputting the output signal to the next stage, and between the input diode and the output terminal, the control it is the electrode connected to the input diode of the next stage and a second transistor having a clamping function for turning off the first transistor to discharge the accumulated charge when the phase of the clock change.