Power supply module, power supply control circuit and method for improving insufficient discharge of display panel

Abstract

The invention discloses a power supply module, a power supply control circuit and a method for improving insufficient discharge of a display panel, which belong to the technical field of display panels. The power supply module comprises a timing and voltage controller, a register unit connected with the timing and voltage controller, a voltage generating unit connected with the register unit, andan external power supply input unit. The register unit is provided with a first temporary storage space and a second temporary storage space. The current output from the first temporary storage spaceto the current output pin of a rectifier tube is greater than the current output from the second temporary storage space to the current output pin of the rectifier tube. According to the invention, different adjustment current corresponds to different adjustment tube voltage, and thus achieving the purpose of generating two different VGHs; shutting down and VGH voltage upraise are realized simplythrough software adjustment; a peripheral hardware circuit is not added; and the cost and the layout of the PCB space are not affected.

Description

Technical field [0001] The present invention relates to the technical field of a display panel, in particular to a power supply module, a power control circuit and a method for improving insufficient discharge of the display panel. Background technique [0002] For the display panel of the GDM circuit (that is, the gate drive circuit is designed in the display panel), it needs to connect all the thin film transistors TFT of all GDM circuits to the on-state voltage VGH to discharge the TFT of the GDM circuit when shutting down. At this time, the power-off sequence of the on-state voltage VGH is required to be slow and maintain the on-state voltage VGH at a higher voltage for a period of time, but the speed of the power-off sequence is not easy to control, and it is extremely prone to insufficient shutdown discharge. [0003] Since all thin film transistors TFT are connected to the on-state voltage VGH for discharge through the reset signal Reset when shutting down, and the on-state ...

AI Technical Summary

Problems solved by technology

[0002] For the display panel of the GDM circuit (that is, the gate drive circuit is designed in the display panel), it is necessary to connect all the thin-film transistors TFT of all the GDM circuits to the on-state voltage VGH to discharge the TFTs of the GDM circuit when it is turned off. At this time, the power-down sequence of the on-state voltage VGH is required to be slow and the on-state voltage VGH should be maintained at a higher voltage for a period of time, but the speed of the power-off sequence is not easy to control, and it is very easy to cause insufficient discharge during shutdown

[0003] Since all the thin film transistors TFT are connected to the on-state voltage VGH through the reset signal Reset to discharge when the power is turned off, and the on-state voltage VGH is also in a power-down state when the power is off, so the time for the on-state voltage VGH to maintain a higher voltage is insufficient. Insufficient discharge problem

Images