Multiple demura compensation method, processing circuit and display device

Abstract

A multi-mottle pattern compensation method includes obtaining a first compensation curve equation for pixels of a display panel, wherein the first compensation curve equation is determined based on a first compensation value of a first captured image related to an input image; capturing a second captured image based on a compensated input image displayed on the display panel, wherein the compensated input image is determined based on the input image and the first compensation curve equation; determining a second compensation value for pixels of the display panel based on the second captured image, and performing downsampling processing on the second compensation value to generate a second downsampled compensation value; determining a second compensation curve equation based on the second downsampled compensation value; and calculating the first compensation curve equation and the second compensation curve equation to generate an output compensation curve equation for pixels of the display panel.

Claims

1. A method for compensating for multiple moiré patterns, comprising: The process involves: obtaining a first compensation curve equation for pixels of a display panel, wherein the first compensation curve equation is determined based on a first compensation value of a first captured image associated with an input image; capturing a second captured image based on a compensated input image displayed on the display panel, wherein the compensated input image is determined based on the input image and the first compensation curve equation; determining a second compensation value for the pixel of the display panel based on the second captured image, and performing downsampling processing on the second compensation value to generate a second downsampled compensation value; determining a second compensation curve equation based on the second downsampled compensation value; and calculating the first compensation curve equation and the second compensation curve equation to generate an output compensation curve equation for pixels of the display panel.

2. The multi-mottle compensation method as described in claim 1, further comprising: The first captured image is captured based on the input image displayed on the display panel or a test display panel; the first compensation value of the pixel of the display panel is determined based on the first captured image; the first compensation value is downsampled to generate a first downsampled compensation value; and a curve fitting operation is performed on the first downsampled compensation value to generate the first compensation curve equation for the pixel of the display panel.

3. The multi-mottle compensation method as described in claim 1, further comprising: The first downsampling compensation value corresponding to the input image is determined according to the first compensation curve equation; the first downsampling compensation value corresponding to the input image is upsampled to generate a first compensation value corresponding to the input image; and the first compensation value corresponding to the input image is used to compensate the input image to generate the compensated input image.

4. The multi-mottle compensation method as described in claim 1, further comprising: A curve fitting operation is performed on the second downsampled compensation value of the pixel to generate the second compensation curve equation for the pixels of the display panel.

5. The multi-mottle compensation method as described in claim 1, wherein a first block size is used in each downsampling block to downsample the first compensation value to generate a first downsampling compensation value, and a second block size is used in each downsampling block to generate the second downsampling compensation value, wherein the first block size is larger than the second block size.

6. The multi-mottle compensation method as described in claim 1, further comprising: The first compensation curve equation is subjected to upsampling to generate the first upsampling compensation curve equation; The second compensation curve equation is upsampled to generate a second upsampled compensation curve equation; a merging operation is performed based on the first compensation curve equation and the second compensation curve equation to generate a merged compensation curve equation for the pixel of the display panel; and the merged compensation curve equation is downsampled to generate the output compensation curve equation for the pixel of the display panel.

7. A processing circuit configured to obtain a first compensation curve equation for a pixel of a display panel, wherein the first compensation curve equation is determined based on a first compensation value of a first captured image associated with an input image, the processing circuit being configured to determine a second compensation value of the pixel of the display panel based on a second captured image and to perform downsampling processing on the second compensation value to generate a second downsampled compensation value, wherein the second captured image is captured based on a compensated input image displayed on the display panel, and the compensated input image is determined based on the first compensation curve equation and the input image, wherein the processing circuit is configured to determine the second compensation curve equation based on the second downsampled compensation value and to calculate the first compensation curve equation and the second compensation curve equation to generate an output compensation curve equation for the pixel of the display panel.

8. The processing circuitry of claim 7, wherein the first captured image is captured based on the input image displayed on the display panel or a test display panel, wherein the processing circuitry is configured to determine the first compensation value of the pixels of the display panel based on the first captured image, perform downsampling processing on the first compensation value to generate a first downsampled compensation value, and perform a curve fitting operation on the first downsampled compensation value to generate the first compensation curve equation with respect to the pixels of the display panel.

9. The processing circuitry of claim 7, wherein the processing circuitry is configured to determine a first downsampled compensation value corresponding to the input image according to the first compensation curve equation, perform upsampling processing on the first downsampled compensation value corresponding to the input image to generate a first compensation value corresponding to the input image, and use the first compensation value corresponding to the input image to compensate the input image to generate the compensated input image.

10. The processing circuitry of claim 7, wherein the processing circuitry is configured to perform a curve fitting operation on the second undersampled compensation value of the pixel to generate the second compensation curve equation for the pixels of the display panel.

11. The processing circuit of claim 7, wherein a first block size is used in each downsampling block to downsample the first compensation value to generate a first downsampling compensation value, and the second downsampling compensation value is generated in each downsampling block using a second block size, wherein the first block size is larger than the second block size.

12. The processing circuitry of claim 7, wherein the processing circuitry is configured to upsample the first compensation curve equation to generate a first upsampled compensation curve equation, upsample the second compensation curve equation to generate a second upsampled compensation curve equation, perform a merging operation based on the first compensation curve equation and the second compensation curve equation to generate a merged compensation curve equation for the pixels of the display panel, and downsample the merged compensation curve equation to generate the output compensation curve equation for the pixels of the display panel.

13. A display device, comprising: A display panel; A memory configured to store a first compensation curve equation for a pixel of a display panel, wherein the first compensation curve equation is determined based on a first compensation value of a first captured image associated with an input image; and a processing circuit configured to determine a second compensation value of the pixel of the display panel based on a second captured image and to perform downsampling processing on the second compensation value to generate a second downsampled compensation value, wherein the second captured image is captured based on a compensated input image displayed on the display panel, and the compensated input image is determined based on the input image and the first compensation curve equation; wherein the processing circuit determines the second compensation curve equation based on the second downsampled compensation value and calculates the first compensation curve equation and the second compensation curve equation to generate an output compensation curve equation for the pixel of the display panel.

14. The display device of claim 13, wherein the first captured image is captured based on the input image displayed on the display panel or a test display panel, wherein the processing circuit is configured to determine the first compensation value of the pixels of the display panel based on the first captured image, perform downsampling processing on the first compensation value to generate a first downsampled compensation value, and perform a curve fitting operation on the first downsampled compensation value to generate the first compensation curve equation with respect to the pixels of the display panel.

15. The display device of claim 13, wherein the processing circuit is configured to determine a first downsampled compensation value corresponding to the input image according to the first compensation curve equation, perform upsampling processing on the first downsampled compensation value corresponding to the input image to generate a first compensation value corresponding to the input image, and use the first compensation value corresponding to the input image to compensate the input image to generate the compensated input image.

16. The display device of claim 13, wherein the processing circuitry is configured to perform a curve fitting operation on the second undersampled compensation value of the pixel to generate the second compensation curve equation for the pixels of the display panel.

17. The display device of claim 13, wherein a first block size is used in each downsampling block to downsample the first compensation value to generate a first downsampling compensation value, and the second downsampling compensation value is generated in each downsampling block using a second block size, wherein the first block size is larger than the second block size.

18. The display device of claim 13, wherein the processing circuit is configured to upsample the first compensation curve equation to generate a first upsampled compensation curve equation, upsample the second compensation curve equation to generate a second upsampled compensation curve equation, perform a merging operation based on the first and second compensation curve equations to generate a merged compensation curve equation for the pixels of the display panel, and downsample the merged compensation curve equation to generate the output compensation curve equation for the pixels of the display panel.

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