Grid drive circuit and array substrate and display panel thereof

Abstract

The invention relates to a grid drive circuit and an array substrate and a display panel of the grid drive circuit. The grid drive circuit comprises multi-stage grid drive units, and each stage of grid drive unit comprises a starting unit for transmitting a starting signal, an energy storage unit for executing charging according to the starting signal in order to output a driving voltage, an pulling-up unit, a first pulling-down unit, a second pulling-down unit and a third pulling-down unit, wherein the pulling-up unit, the first pulling-down unit, the second pulling-down unit and the third pulling-down unit work under the action of the driving voltage. The third pulling-down unit is used for pulling the driving voltage to a second reference voltage in a perpendicular flyback period so that an opposite bias voltage can be applied to grids and sources and/or grids and drains of transistors in the grid drive circuit, threshold voltages of the transistors in forward migration can have reverse migration, bad influences on the grid drive circuit caused by threshold voltage migration of the transistors can be effectively eliminated, and the grid drive circuit and the array substrate and the display panel of the grid drive circuit can work more reliably.

Description

technical field [0001] The present invention relates to liquid crystal display drive technology, in particular to a gate drive circuit, an array substrate and a display panel thereof. Background technique [0002] The existing liquid crystal display panel includes a plurality of pixel units, and a gate driving circuit and a source driving circuit for driving the pixel units to work. Wherein, the gate driving circuit includes multi-level gate driving units, and these gate driving units sequentially output gate signals through the gate lines coupled to them, and control the corresponding switch transistors in the display area to turn on, so that the source driving circuit The output data signal is written into the corresponding pixel unit for image display. Therefore, the reliability of the operation of the gate drive unit has a decisive influence on the correct imaging. At present, the structure of the gate drive unit of the gate drive circuit used by mainstream liquid crys...

AI Technical Summary

Problems solved by technology

[0003] In view of the above problems, the present invention provides a gate drive circuit and its array substrate and display panel, which can effectively solve the problem that the transistor in the prior art cannot be turned on normally due to threshold voltage shift, which leads to the failure of the gate drive circuit. problem with normal work

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