Shift register, gate drive circuit, display panel and display device

A gate drive circuit and shift register technology, applied in the fields of shift registers, gate drive circuits, display panels and display devices, can solve the problem of affecting the display effect, unable to realize the step-by-step shift of high-potential signals, and PMOS leakage current. big problem
CN111145823AActive Publication Date: 2020-05-12WUHAN TIANMA MICRO ELECTRONICS CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN TIANMA MICRO ELECTRONICS CO LTD
Publication Date
2020-05-12

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Abstract

The invention discloses a shift register, a gate drive circuit, a display panel and a display device. The shift register comprises a second output module and a coupling module, and the two ends of thecoupling module are electrically connected with a third node and a second signal output end respectively. At the second stage, the potential of a fourth node is an enable potential, and the second output module transmits a high-potential signal of the first power supply signal input end to the second output end; at the third stage, the potential of the third node is an enable potential, and the second output module transmits a low-potential signal of the second power supply signal input end to the second output end, i.e., the signal of the second output end jumps from high to low, and at themoment, the low-potential signal of the second output end is coupled to the third node through the coupling effect of the coupling module, so that the potential of the third node is lower than that ofthe second stage, the low-potential signal of the second power supply signal input end has no transmission loss, the transistor controlled by the second signal output end can be completely turned off, and the leakage current loss is avoided.
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Description

technical field

[0001] Embodiments of the present invention relate to the field of display technology, and in particular, to a shift register, a gate drive circuit, a display panel, and a display device. Background technique

[0002] With the development of display technology, while pursuing a higher resolution of the display device, the power consumption of the display device increases accordingly. In order to reduce power consumption of a display device, a frame rate may be reduced to drive pixels at a low speed during a certain period of time. For example, in a mobile terminal, the normal display mode executes a normal driving frequency based on 60 Hz or 120 Hz; in the standby mode, executes a driving frequency based on 1 Hz-5 Hz, thus reducing power consumption.

[0003] Generally, in order to ensure display stability, a pixel driving circuit of a display device may be designed using a P-type metal oxide semiconductor field effect transistor (Positive Channel Metal Oxid...

Claims

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