Voltage supply unit, method, display driving circuit and display device

Abstract

The invention provides a voltage supply unit, a method, a display driving circuit and a display device. The voltage supply unit includes a control circuit, a capacitor circuit and a one-way conduction circuit. The control circuit is used to control the output terminal to communicate with the first input terminal or the second input terminal under the control of the voltage signal output by the first voltage output terminal; the capacitor circuit Used to control the potential of the first input terminal; the unidirectional conduction circuit is used to allow the flow from the first level terminal to all The unidirectional current flowing through the first end of the unidirectional conduction circuit, when the difference between the first level and the potential of the first input end is less than the predetermined conduction voltage, the control between the first level end and the first input end disconnected intermittently. The present invention can increase the drive voltage and drive current that the control circuit outputs to the display panel through its output terminal during the shutdown time period, so as to effectively solve the problem of residual image after shutdown of the display panel.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a voltage supply unit, a method, a display driving circuit and a display device. Background technique [0002] With the application trend of large size and high resolution of TFT-LCD (Thin Film Transistor-Liquid Crystal Display), there are more and more GOA (Gate On Array, gate drive circuit set on the array substrate) units and pixels driven by the circuit. , the load of the display panel is also increasing, which puts forward higher requirements on the output driving capability of the Level shifter (level converter). [0003] During the reliability test of the 75-inch 8K display, there was a bad afterimage after shutdown. The timing sequence of the display panel design required that the level shifter output the voltage signal VGL, the first high-voltage signal VDDO, and the second high-voltage signal at the low-voltage output terminal during shutdown. Both VDDE and th...

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a voltage supply unit, a method, a display driving circuit and a display device, which can solve the afterimage phenomenon when the display panel is turned off in the prior art because the potential of the gate drive signal is not high enough.

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