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Power supply circuit, driving device and display device

A technology of power supply circuit and power supply module, applied in static indicators, instruments, etc., can solve the problems of low VGH signal voltage, unable to meet the high refresh frequency requirements of the display panel, etc., and achieve the effect of shortening the delay of turning off the screen

Active Publication Date: 2022-05-13
HONOR DEVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present application provides a power supply circuit, a driving device and a display device, which can solve the problem in the related art that the voltage of the VGH signal is low and cannot meet the high refresh frequency requirement of the display panel

Method used

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  • Power supply circuit, driving device and display device
  • Power supply circuit, driving device and display device
  • Power supply circuit, driving device and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] figure 1 It is a schematic structural diagram of a display device 20 including a power supply circuit 10 provided by an embodiment of the present application. see figure 1 , the display device 20 includes a power supply circuit 10 , a driving module 22 and a display panel 24 .

[0064] The display panel 24 includes a plurality of pixel circuits 242 and a plurality of light-emitting units OLED (only one is shown in the figure), and the plurality of pixel circuits 242 correspond to the plurality of light-emitting units OLED one-to-one, and each pixel circuit 242 is used to drive a corresponding light-emitting unit. The unit OLEDs emit light, and each light emitting unit OLED is a sub-pixel on the display panel 24 . The pixel circuit 242 includes a switching transistor TFT1 and a driving transistor TFT2.

[0065] When the display device 20 is working, the power supply circuit 10 needs to output voltage signals including ELVDD signal, ELVSS signal, AVDD signal, VDDIO sig...

Embodiment 2

[0077] When the display device 20 is displaying an image, when the display device 20 receives a screen-off instruction sent by the user, the display panel 24 needs to stop displaying the image quickly. Generally, when the display device 20 receives an instruction to turn off the screen from the user, the first power supply module 110 and the second power supply module 120 stop outputting voltage signals, but the wires connected to the first input terminal e of the drive module 22 (including the drive module The wire connected between the first input end e of 22 and the output end a of the first power module 110, and the wire connected between the output end a of the first power module 110 and the first output end b of the second power module 120 ) still has a residual voltage signal. The driving module 22 may continue to generate the gate open signal VGH according to the residual voltage signal, so that the display device 20 has a longer screen-off delay. The screen-off delay...

Embodiment 3

[0095] When the display device 20 needs to display images, the first power module 110 starts to work first, and its output terminal a outputs the first voltage signal VCI. The first voltage signal VCI is used to trigger the second power module 120 to work. Therefore, before the second power module 120 starts to work, because the output terminal a of the first power module 110 is connected to the first output terminal b of the second power module 120, the first voltage signal VCI may be fed back to the second power module. 120's first output terminal b. Similarly, after the second power module 120 starts working, since the voltage of the second voltage signal ELVDD is greater than the voltage of the first voltage signal VCI, the second voltage signal ELVDD may be fed back to the output terminal a of the first power module 110 . "Backfeeding" means that the voltage signal is input from the output terminal of a certain power module to the inside of the power module.

[0096] In...

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Abstract

The application discloses a power supply circuit, a driving device and a display device, which belong to the field of display technology. The power circuit includes: a first power module and a second power module. The output terminal of the first power supply module is connected with the first output terminal of the second power supply module, and is used for connecting with the first input terminal of the driving module. The output end of the first power module is used to output the first voltage signal, and the first output end of the second power module is used to output the second voltage signal. The second output terminal of the second power supply module is used to connect with the second input terminal of the driving module to output a third voltage signal. The voltage signals output by the output terminal of the first power supply module, the first output terminal and the second output terminal of the second power supply module are used to instruct the drive module to generate a door opening signal. The power supply circuit in the present application can increase the voltage of the gate opening signal generated by the driving module, so that the voltage of the gate opening signal can meet the high refresh frequency requirement of the display panel.

Description

technical field [0001] The present application relates to the field of display technology, in particular to a power supply circuit, a driving device and a display device. Background technique [0002] The display device includes a power supply circuit, a driving module and a display panel. The power circuit includes a first power module and a second power module. When the display panel needs to display images, the first power supply module outputs a VCI signal to the drive module, and the drive module triggers the second power supply module to work when receiving the VCI signal. When the second power supply module is working, it outputs ELVDD signal and ELVSS signal to the display panel, and outputs AVDD signal to the driving module. The driving module generates a VGH signal according to the AVDD signal and the VCI signal, and generates a data signal according to an image to be displayed, and outputs both the VGH signal and the data signal to the display panel, so that the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/20G09G3/3208G09G3/3258
CPCG09G3/20G09G3/3208G09G3/3258G09G2330/028G09G2330/027G09G2330/026G09G3/3696H02M1/10G09G3/3225G09G2310/0248
Inventor 李博文段伟亮李岩朱辰
Owner HONOR DEVICE CO LTD