Patent ID: 9542897
Date: 2017-01-10
CPC Classifications: G09G

Claim:
1. A display device comprising: a plurality of pixels arranged in a matrix; a plurality of gate signal lines each applying a gate signal to the corresponding pixels; and a gate signal line driving circuit outputting the gate signals to the plurality of gate signal lines, wherein the gate signal line driving circuit comprises: a plurality of shift register basic circuits each of which outputs to the corresponding gate signal line the gate signal which has a high voltage during a high signal period and has a low voltage during a low signal period that is a period other than the high signal period, wherein each of the shift register basic circuits comprises: a first transistor which is in an ON state in accordance with the high signal period to apply the high voltage to the corresponding gate signal line; a second transistor which is in an ON state in accordance with the low signal period to apply the low voltage to the corresponding gate signal line; a third transistor which is turned on to apply the low voltage to the corresponding gate signal line in at least a part of a period until the second transistor is turned on after the first transistor is turned off; a fourth transistor which applies an OFF voltage to a control electrode of the second transistor in an ON state; and a fifth transistor which applies an OFF voltage to a control electrode of the fourth transistor, wherein a common ON control signal is input to both the control electrode of the fourth transistor and a control electrode of the first transistor, and both the fourth transistor and the first transistor are turned on by the common ON control signal, and wherein the control electrode of the second transistor is electrically connected to the control electrode of the fifth transistor of a subsequent stage of the shift register basic circuit.