Shifting register and driving method thereof as well as grid electrode driving circuit and display device

Abstract

The invention discloses a shifting register and a driving method thereof as well as a grid electrode driving circuit and a display device, relating to the field of display. A needed electrical level can be stably output and bad phenomena caused by the fact that the output is not stable when a clock signal is converted and an output signal is interfered are eliminated, so that the display quality is guaranteed. According to the shifting register, an input module is used for sending an input signal to an output module, a resetting module and a maintaining module according to an input signal and a first clock signal; the resetting module is connected with the input module and a signal output end and is used for resetting a signal output end according to the first clock signal, first and second electrical level signals and the input signal; the maintaining module is connected with the input module and the output module and is used for sending a maintaining signal to the output module according to the input signal, the second clock signal and the second electrical level signal; and the output module is connected with the input module, the maintaining module and the signal output end and is used for sending the output signal to the signal output end according to the input signal, the maintaining signal and the second clock signal.

Description

technical field [0001] The invention relates to the display field, in particular to a shift register, a driving method thereof, a gate driving circuit and a display device. Background technique [0002] In recent years, Liquid Crystal Display (LCD for short) has developed rapidly due to the advantages of zero radiation, low power consumption, small heat dissipation, small size, accurate image restoration, and sharp character display, and has become the mainstream in the display field. [0003] The pixel array of the liquid crystal display includes several rows of grid scanning lines and several columns of data lines. Among them, the gate drive circuit composed of several shift registers provides signals to several rows of gate scanning lines of the pixel array, so as to control the multiple rows of gate scanning lines to be opened sequentially, and the data lines of the corresponding rows are sent to the pixel array. The pixel electrodes are charged to form the gray-scale v...

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Problems solved by technology

[0004] When a certain row of pixels is in the non-selection period, the shift register corresponding to this row needs to be able to output the voltage (hereinafter referred to as the shutdown voltage) that makes each driving thin film transistor (driving TFT) of this row of pixels turn off, but the existing The shift register mostly uses the clock signal, and the non-selection period is longer. If the clock signal changes during the non-selection period, the shift register is affected by the parasitic capacitance effect of its internal circuit, and it cannot guarantee the operation of the non-selection period. It can provide a stable off voltage at every moment, which will easily lead to unstable output. When it is applied to the gate drive of LCD panels, it will cause uneven horizontal bright lines and bright lines on the screen, which will affect the display quality.

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