Display device

Patent metadata

Field	Value
Publication number	US-11990071-B2
Application number	US-202117618478-A
Country	US
Kind code	B2
Filing date	Nov 23, 2021
Priority date	Nov 16, 2021
Publication date	May 21, 2024
Grant date	May 21, 2024

Abstract

The present application discloses a display device. In the display device provided by the present application, by making the refresh frequencies correspond to the white balance look-up tables and the gamma voltages, when the refresh frequencies of the display panel change, the brightness of the images of the display panel can be adjusted by adjusting the white balance look-up table and the gamma voltage provided to the display panel.

First claim

What is claimed is:

1. A display device, comprising a display panel, a driving module, a first power control module, and a second power control module;
wherein the driving module is configured to transmit a driving signal to the display panel to control the display panel to refresh images at different refresh frequencies;
wherein the first power control module is configured to call white balance look-up tables corresponding to the refresh frequencies of the display panel according to the refresh frequencies of the display panel, so that the display panel displays the images with preset brightness while refreshing the images at the different refresh frequencies;
wherein the second power control module is configured to provide gamma voltages corresponding to the refresh frequencies of the display panel to the display panel when the refresh frequencies of the display panel are switched, so as to reduce a brightness difference when the display panel refreshes the images at the different refresh frequencies;
wherein the first power control module comprises a first control unit and a first power management unit;
wherein the driving module is also configured to transmit a first enable signal to the first control unit when transmitting the driving signal to the display panel; the first control unit is configured to determine the refresh frequencies of the display panel according to the first enable signal; and the first power management unit is configured to call the white balance look-up tables corresponding to the refresh frequencies of the display panel according to the refresh frequencies of the display panel;
wherein the second voltage module comprises a second control unit and a second power management unit; and
wherein the driving module is also configured to transmit a second enable signal to the second control unit when transmitting the driving signal to the display panel; the second control unit is configured to determine whether the refresh frequencies of the display panel are switched according to the second enable signal; and the second power management unit is configured to provide the display panel with the gamma voltages corresponding to the refresh frequencies of the display panel according to the refresh frequencies of the display panel.

2. The display device according to claim 1 , wherein the display device stores a plurality of the white balance look-up tables; wherein the plurality of white balance look-up tables are set in a one-to-one correspondence with a plurality of refresh frequency intervals.

3. The display device according to claim 2 , wherein a time period required for switching between different ones of the white balance look-up tables is a time period of at least two frames.

4. The display device according to claim 3 , wherein the time period required for switching between different ones of the white balance look-up tables is at least a time period including a first frame time and a second frame time; and
wherein within the first frame time, the display device detects the refresh frequencies of the display device; and within the second frame time, the display device loads corresponding ones of the white balance look-up tables.

5. The display device according to claim 4 , wherein the second power control module is configured to provide the display panel with the gamma voltages corresponding to the refresh frequencies of the display panel within the second frame time to reduce the brightness difference when the display panel refreshes the images at the different refresh frequencies.

6. The display device according to claim 4 , wherein when the display device is switched from a first refresh frequency to a second refresh frequency, within the first frame time and the second frame time, the first power control module calls a white balance look-up table corresponding to the first refresh frequency.

7. The display device according to claim 4 , wherein when the display device is switched from a first refresh frequency to a second refresh frequency, before the first frame time, the first power control module calls a white balance look-up table corresponding to the first refresh frequency.

8. The display device according to claim 4 , wherein when the display device is switched from a first refresh frequency to a second refresh frequency, after the second frame time, the first power control module calls a white balance look-up table corresponding to the second refresh frequency.

9. A display device, comprising a display panel, a driving module, a first power control module, and a second power control module;
wherein the driving module is configured to transmit a driving signal to the display panel to control the display panel to refresh images at different refresh frequencies;
wherein the first power control module is configured to call white balance look-up tables corresponding to the refresh frequencies of the display panel according to the refresh frequencies of the display panel, so that the display panel displays the images with preset brightness while refreshing the images at the different refresh frequencies;
wherein the second power control module is configured to provide gamma voltages corresponding to the refresh frequencies of the display panel to the display panel when the refresh frequencies of the display panel are switched, so as to reduce a brightness difference when the display panel refreshes the images at the different refresh frequencies.

10. The display device according to claim 9 , wherein the display device stores a plurality of the white balance look-up tables; wherein the plurality of white balance look-up tables are set in a one-to-one correspondence with a plurality of refresh frequency intervals.

11. The display device according to claim 10 , wherein a time period required for switching between different ones of the white balance look-up tables is a time period of at least two frames.

12. The display device according to claim 11 , wherein the time period required for switching between different ones of the white balance look-up tables is at least a time period including a first frame time and a second frame time; and
wherein within the first frame time, the display device detects the refresh frequencies of the display device; and within the second frame time, the display device loads corresponding ones of the white balance look-up tables.

13. The display device according to claim 12 , wherein the second power control module is configured to provide the display panel with the gamma voltages corresponding to the refresh frequencies of the display panel within the second frame time to reduce the brightness difference when the display panel refreshes the images at the different refresh frequencies.

14. The display device according to claim 12 , wherein when the display device is switched from a first refresh frequency to a second refresh frequency, within the first frame time and the second frame time, the first power control module calls a white balance look-up table corresponding to the first refresh frequency.

15. The display device according to claim 12 , wherein when the display device is switched from a first refresh frequency to a second refresh frequency, before the first frame time, the first power control module calls a white balance look-up table corresponding to the first refresh frequency.

16. The display device according to claim 12 , wherein when the display device is switched from a first refresh frequency to a second refresh frequency, after the second frame time, the first power control module calls a white balance look-up table corresponding t

Assignees

• Tcl China Star Optoelectronics Tech Co Ltd

Inventors

• Zhao Yizhuo

Classifications

• G09G3/20 Primary

  for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} · CPC title

• G09G2320/0233

  Improving the luminance or brightness uniformity across the screen · CPC title

• G09G2320/0247

  Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes · CPC title

• G09G2320/0276

  for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction · CPC title

• G09G2320/0626

  for control of overall brightness · CPC title