Shift register and drive method, gird drive device, and display device thereof

Abstract

The invention provides a shift register, as well as a drive method, a grid drive device, and a display device thereof. The shift register comprises a precharge unit, a pull-up control unit, a pull-up unit, a pull-down control unit and a pull-down unit, wherein the precharge unit is connected with an initial signal input terminal, a first clock signal input terminal, a control node, and a low level output terminal of a drive power supply; the pull-up control unit is connected with the control node, a pull-up node, the first clock signal input terminal, and a high level output terminal and the low level output terminal of the drive power supply; the pull-down control unit is connected with the control node, a pull-down node, and the high level output terminal and the low level output terminal of the drive power supply; the pull-up unit is connected with the pull-up node and an output terminal; the pull-down unit is connected with the pull-down node, the output terminal and the low level output terminal of the drive power supply respectively; and a first clock signal and a second clock signal are opposite in phase. The utility model solves the problems of unstable output waveforms and high noise.

Description

technical field [0001] The present invention relates to the display field, in particular to a shift register, a driving method thereof, a gate driving device and a display device. Background technique [0002] In the flat panel display, the basic principle of realizing a frame of picture display is to output the data signal required by each row of pixels from top to bottom through the source (source) drive, and the Gate (gate) drive to each row from top to bottom in turn. A row of pixel gates is input with a square wave of a certain width for gating. [0003] The current manufacturing method is to bond the gate driver IC (integrated circuit) and the source driver IC on the glass panel through the COG (Chip On Glass, fixing the chip on the glass) process. When the resolution is high, the gate driver outputs more, and the length of the driver IC will increase, which will increase the difficulty of the COG process and reduce the yield of the product. Contents of the inventio...

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a shift register and its driving method, which solves the problem of unstable output waveform and large noise in the prior art

[0005] The present invention also provides a gate drive device and a display device, which solves the problem in the prior art that the gate drive IC and the source drive IC need to be bound to the glass panel through the COG process, resulting in a decrease in product yield

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