Shifting register unit and grid drive circuit as well as display device

Abstract

The invention discloses a shifting register unit and a grid drive circuit as well as a display device. The shifting register unit comprises an input module, a processing module and an output module, wherein the input module is used for inputting a first clock signal, a second clock signal, a frame start signal, a high-voltage signal and a low-voltage signal; the processing module is connected with the input module and comprises a plurality of thin film transistors; the processing module is used for generating grid drive signals according to the first clock signal, the second clock signal and the frame start signal, controlling that the voltage of first nodes formed by the thin film transistors at an evaluation phase of the shifting register unit is lower than a lower level of a power supply signal, controlling second nodes formed by the thin film transistors to be reset, and cutting off a transient direct-current path formed by the input end of the high-voltage signal, the input end of the low-voltage signal and at least one thin film transistor in time; and the output module is connected with the processing module and is used for sending out the grid drive signals generated by the processing module. According to the invention, the transient current is reduced and the power consumption of the shifting register unit is reduced.

Description

technical field [0001] The invention relates to display driving technology, in particular to a shift register unit, a gate driving circuit and a display device. Background technique [0002] In the display driving technology, scan lines (scan lines) and data lines (data lines) intersect to form an active matrix (active matrix). The driving circuit of the scanning line is usually implemented by a shift register. The shift register can be divided into a dynamic shift register and a static shift register according to the type. The structure of the dynamic shift register is relatively simple and requires a small number of films. Transistor (Thin Film Transistor; hereinafter referred to as: TFT) device, but its power consumption is relatively large, and its operating frequency bandwidth is limited; while the static shift register requires more TFT devices, but its operating bandwidth is large and its power consumption is low. When considering the performance of a shift register,...

AI Technical Summary

Problems solved by technology

[0004] However, since the output terminal is connected to a load, its potential change speed is relatively slow; for prior art 1, it takes a while for the output terminal to change from high level to low level during the evaluation phase of the output terminal, and only the output When the terminal voltage is lower than the preset threshold voltage, M4 can be turned on, and before M4 is turned on, M5 is still in the on state, and then there is a DC path from VDD to VSS through M5, M2; for the prior art two In other words, in the reset stage of the output terminal, it takes a while for the output terminal to change from low level to high level, then M5 is not turned off in time, and there is a DC path from VDD through M5, M3 to VSS

The presence of a DC path results in additional transient currents that increase power dissipation in the shift register

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