Gray scale adjustment method and device for display panel
AssigneesHkc Corporation Limited, Chongqing Hkc Optoelectronics Technology Co., Ltd.
InventorMingliang Wang
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Abstract
The present invention discloses a gray scale adjustment method and device for a display panel. The method includes: performing an image acquisition on the display panel to obtain a current image; identifying a relationship between a sum of gray scale values of all pixels in the current image and a target value by a distinguishing method, in order to identify an uneven block in the current image; detecting an original output luminance and an original input gray scale of the uneven block; determining a target input gray scale corresponding to a preset target luminance according to an actual gamma curve value obtained by testing the display panel; and taking a difference between the original input gray scale and the target input gray scale as a gray scale compensation value of the uneven block.
Claims19
A gray scale adjustment method for a display panel, comprising:
- performing an image acquisition on the display panel to obtain a current image;
- identifying an uneven block in the current image by using a distinguishing method, and detecting an original output luminance and an original input gray scale of the uneven block, wherein the distinguishing method includes either (a) identifying a block of the current image in which a sum of gray scale values of all pixels exceeds a target value range or (b) identifying a block of the current image in which a sum of gray scale values of all pixels is lower than a target value range;
- determining a target input gray scale corresponding to a preset target luminance according to an actual gamma curve value, wherein the actual gamma curve value is obtained by testing the display panel;
- taking a difference between the original input gray scale and the target input gray scale as a gray scale compensation value of the uneven block;
- and
- transmitting the gray scale compensation value to the display panel, so that the display panel adds the gray scale compensation value to the original input gray scale of the uneven block as a new input gray scale of the uneven block to eliminate the uneven block in the current image.
A gray scale adjustment device for a display panel, comprising a processor, and a memory coupled to the processor and including instructions to cause the processor to perform operations comprising:
- performing an image acquisition on the display panel to obtain a current image;
- identifying an uneven block in the current image by using a distinguishing method, and detecting an original output luminance and an original input gray scale of the uneven block, wherein the distinguishing method includes (a) identifying a block of the current image in which a sum of gray scale values of all pixels exceeds a target value range or (b) identifying a block of the current image in which a sum of gray scale values of all pixels is lower than a target value range;
- determining a target input gray scale corresponding to a preset target luminance according to an actual gamma curve value, wherein the actual gamma curve value is obtained by testing the display panel;
- and
- to taking a difference between the original input gray scale and the target input gray scale as a gray scale compensation value of the uneven block and transmitting the gray scale compensation value to the display panel, wherein the display panel adds the gray scale compensation value to the original input gray scale of the uneven block as a new input gray scale of the uneven block to eliminate the uneven block in the current image.
Dependencies are inferred from the claim text.