Shifting register and control method thereof, display panel and display device

Abstract

The invention discloses a shift register and a control method thereof, a display panel and a display device. The shift register comprises: a shift register; a first node control module, a second nodecontrol module and a third node control module, the first node control module transmits the voltage of the input end of the shift register to a first node in response to the conduction level of a first clock signal end, and transmits the voltage of a second level voltage end to the first node in response to the conduction levels of a second clock signal end and a third node; the second node control module transmits the voltage of a second level voltage end to the second node in response to the conduction level of the first node, and transmits the voltage of a second clock signal end to the second node in response to the conduction level of the third node and the conduction level of the second clock signal end; the voltage absolute value of the conduction level of the first clock signal endis greater than the voltage absolute value of the conduction level of the third clock signal end. According to the embodiment of the invention, the trailing problem of the output level of the shift register can be improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a shift register and a control method thereof, a display panel and a display device. Background technique [0002] In the field of display, in order to realize scanning display or other functions, shift registers are often required. However, when the shift register is working, the voltage of its internal control node inevitably has a threshold loss, so that the corresponding switch module cannot be fully turned on (fully open state), resulting in the level transmitted to the output of the shift register. To the target voltage, there will be a tailing phenomenon, which will affect the display effect. Contents of the invention [0003] Embodiments of the present invention provide a shift register and its control method, a display panel and a display device, which can improve the tailing problem of the output level of the shift register. [0004] In a first aspect, an embodimen...

AI Technical Summary

Problems solved by technology

However, when the shift register is working, the voltage of its internal control node inevitably has a threshold loss, so that the corresponding switch module cannot be fully turned on (fully open state), resulting in the level transmitted to the output of the shift register. to the target voltage, resulting in smearing and affecting the display effect

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