CN-121260125-B - Display device and brightness compensation method

CN121260125BCN 121260125 BCN121260125 BCN 121260125BCN-121260125-B

Abstract

The display device comprises a display panel and a controller, wherein the display panel is provided with a plurality of refresh rates, the controller is configured to respond to refresh rate changes of a target display area in the display panel to obtain target input gray scale values of the display panel, determine target compensation gray scale values of the target display area according to the target input gray scale values and the current refresh rate of the target display area, and conduct brightness compensation on the target display area according to the target compensation gray scale values, wherein the target compensation gray scale values are determined according to brightness gray scale mapping relations of target reference brightness and the display panel under the current refresh rate, and the target reference brightness is determined according to the target input gray scale values and the brightness gray scale mapping relations of the display panel under the reference refresh rate. According to the embodiment of the disclosure, the display brightness consistency can be realized under different refresh rates and the display effect can be improved by being applied to the display equipment with multiple refresh rates.

Inventors

DUAN YUNPENG
LIU ZHIJUN
Nan Qingrong
HE KAI

Assignees

青岛信芯微电子科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20251204

Claims (8)

1. A display device, characterized by comprising: wherein the display panel has a plurality of refresh rates; A controller configured to: responding to the refresh rate change of a target display area in the display panel, and acquiring a target input gray scale value of the display panel; inquiring a preset gray level compensation table according to the target input gray level value and the current refresh rate of the target display area, and determining a target compensation gray level value from the gray level compensation table, wherein the gray level compensation table is used for representing the mapping relation between an index and the compensation gray level value, and the index comprises the input gray level value and the refresh rate; performing brightness compensation on the target display area according to the target compensation gray scale value; Wherein, the gray-scale compensation table is constructed by the following steps: Acquiring brightness gray scale mapping relations of the display panel at the plurality of refresh rates; performing inverse transformation according to the brightness gray scale mapping relation under the multiple refresh rates, and determining an inverse function of the brightness gray scale mapping relation under the multiple refresh rates; Determining a plurality of reference brightnesses respectively corresponding to a plurality of input gray scale values according to the brightness gray scale mapping relation under the reference refresh rate; For a first refresh rate of the plurality of refresh rates, determining a plurality of compensation gray scale values corresponding to the plurality of input gray scale values, respectively, according to the plurality of reference luminances and an inverse function at the first refresh rate; and performing interpolation processing according to a plurality of compensation gray scale values corresponding to the plurality of input gray scale values respectively at the first refresh rate to obtain a plurality of compensation gray scale values corresponding to the plurality of input gray scale values respectively at a second refresh rate, wherein the second refresh rate is a refresh rate of the plurality of refresh rates except the first refresh rate.
2. The display apparatus according to claim 1, wherein the compensation gray-scale value in the gray-scale compensation table includes a target value after compensating the input gray-scale value, or the compensation gray-scale value in the gray-scale compensation table includes a correction value compensating the input gray-scale value.
3. The display device of claim 1, wherein the display panel is in a global display mode, the controller being specifically configured to: Acquiring the current refresh rate of the display panel; Determining a target compensation gray scale value of the display panel according to the target input gray scale value and the current refresh rate of the display panel; and carrying out brightness compensation on the full-screen display area of the display panel according to the target compensation gray scale value of the display panel.
4. The display device of claim 1, wherein the display panel is in a zone display mode, the controller being specifically configured to: acquiring a current refresh rate of at least one partition; determining a target compensation gray-scale value of the at least one partition according to the target input gray-scale value and the current refresh rate of the at least one partition; And respectively carrying out brightness compensation on the at least one partition according to the target compensation gray scale value of the at least one partition.
5. The display device of claim 4, wherein the controller is specifically configured to: acquiring transition areas of at least two adjacent partitions; determining candidate compensation gray scale values of the at least two adjacent partitions according to the target input gray scale values and the current refresh rates of the at least two adjacent partitions; Determining at least two compensation weights of the pixel positions according to the position relation of the pixel positions in the transition region relative to the at least two adjacent partitions; and carrying out weighted fusion according to the at least two compensation weights and the candidate compensation gray scale values of the at least two adjacent partitions to obtain the target compensation gray scale value of the pixel position.
6. The display device of claim 5, wherein the controller is specifically configured to: Determining the area of the transition region according to the areas of the at least two adjacent partitions, wherein the area of the transition region in any adjacent partition is positively correlated with the area of any adjacent partition; and/or the number of the groups of groups, And determining the area of the transition region according to the current refresh rate difference value between the at least two adjacent partitions, wherein the area of the transition region is positively correlated with the current refresh rate difference value.
7. The display device of claim 1, wherein the controller is further configured to: If the refresh rate of the index is inconsistent with the current refresh rate of the target display area, determining a similar refresh rate of which the similarity meets a preset condition from the refresh rates of the index according to the similarity between the refresh rate of the index and the current refresh rate; Inquiring the gray level compensation table according to the target input gray level value and the similar refresh rate, and determining the target compensation gray level value from the gray level compensation table.
8. A brightness compensation method applied to a display device, the display device comprising a display panel having a plurality of refresh rates, the method comprising: responding to the refresh rate change of a target display area in the display panel, and acquiring a target input gray scale value of the display panel; inquiring a preset gray level compensation table according to the target input gray level value and the current refresh rate of the target display area, and determining a target compensation gray level value from the gray level compensation table, wherein the gray level compensation table is used for representing the mapping relation between an index and the compensation gray level value, and the index comprises the input gray level value and the refresh rate; performing brightness compensation on the target display area according to the target compensation gray scale value; Wherein, the gray-scale compensation table is constructed by the following steps: Acquiring brightness gray scale mapping relations of the display panel at the plurality of refresh rates; performing inverse transformation according to the brightness gray scale mapping relation under the multiple refresh rates, and determining an inverse function of the brightness gray scale mapping relation under the multiple refresh rates; Determining a plurality of reference brightnesses respectively corresponding to a plurality of input gray scale values according to the brightness gray scale mapping relation under the reference refresh rate; For a first refresh rate of the plurality of refresh rates, determining a plurality of compensation gray scale values corresponding to the plurality of input gray scale values, respectively, according to the plurality of reference luminances and an inverse function at the first refresh rate; and performing interpolation processing according to a plurality of compensation gray scale values corresponding to the plurality of input gray scale values respectively at the first refresh rate to obtain a plurality of compensation gray scale values corresponding to the plurality of input gray scale values respectively at a second refresh rate, wherein the second refresh rate is a refresh rate of the plurality of refresh rates except the first refresh rate.

Description

Display device and brightness compensation method Technical Field The embodiment of the disclosure relates to the technical field of display. And more particularly, to a display apparatus and a brightness compensation method. Background With the development of display technology, mobile terminals, notebook computers, tablet devices, and Variable refresh rate (Variable REFRESH RATE, VRR) displays widely employ a multiple refresh rate driving mode to achieve a balance between power consumption and image quality. In these devices, the display panel is typically provided with multiple refresh rates of 30Hz, 60Hz, 90Hz, 120Hz, 144Hz, etc., and supports ultra-low refresh rate modes of 1Hz, 5Hz, etc. in some scenarios for off-screen display, still picture energy saving display, or low refresh display of a local area. At present, when brightness adjustment is performed on a display device, display brightness is adjusted by changing an input digital gray scale value, however, for the device with multiple refresh rates, there are situations that the input digital gray scale value remains unchanged, but there are differences in actual display brightness of a display panel, for example, when the display panel performs partition display, different partition often adopts different refresh rates, actual display brightness between multiple partitions is inconsistent, and a display effect needs to be improved. Disclosure of Invention In order to solve the above technical problems or at least partially solve the above technical problems, embodiments of the present disclosure provide a display device and a brightness compensation method. In a first aspect, embodiments of the present disclosure provide a display apparatus, including: wherein the display panel has a plurality of refresh rates; A controller configured to: responding to the refresh rate change of a target display area in the display panel, and acquiring a target input gray scale value of the display panel; Determining a target compensation gray scale value of the target display area according to the target input gray scale value and the current refresh rate of the target display area, wherein the target compensation gray scale value is determined according to a target reference brightness and a brightness gray scale mapping relation of the display panel under the current refresh rate, the target reference brightness is determined through the target input gray scale value and the brightness gray scale mapping relation of the display panel under the reference refresh rate, and the reference refresh rate is any one of the refresh rates; and carrying out brightness compensation on the target display area according to the target compensation gray scale value. In a second aspect, embodiments of the present disclosure provide a brightness compensation method applied to a display device including a display panel having a plurality of refresh rates, the method including: responding to the refresh rate change of a target display area in the display panel, and acquiring a target input gray scale value of the display panel; Determining a target compensation gray scale value of the target display area according to the target input gray scale value and the current refresh rate of the target display area, wherein the target compensation gray scale value is determined according to a target reference brightness and a brightness gray scale mapping relation of the display panel under the current refresh rate, the target reference brightness is determined through the target input gray scale value and the brightness gray scale mapping relation of the display panel under the reference refresh rate, and the reference refresh rate is any one of the refresh rates; and carrying out brightness compensation on the target display area according to the target compensation gray scale value. In a third aspect, embodiments of the present disclosure provide a computer-readable storage medium, including a computer program stored thereon, which when executed by a processor, implements the brightness compensation method as shown in the second aspect. In a fourth aspect, embodiments of the present disclosure provide a computer program product comprising instructions which, when run on a computer, cause the computer to implement the brightness compensation method as described in the second aspect. As can be seen from the above technical solutions, in the display device and the luminance compensation method provided by the embodiments of the present disclosure, for a multi-refresh rate display panel, in response to a refresh rate change of a target display area in the display panel, a target input gray-scale value of the display panel is obtained, and further, by determining a target reference luminance of the target input gray-scale value at a reference refresh rate, determining a target compensation gray-scale value that meets the target reference luminance at a current refresh rate, further, perform