Defect mitigation in display panels
View Patent ↗Defect mitigation in display panels. Defects in a display panel are mapped, and the defect information is associated with the display system or associated with the panel. During panel operation, the values of pixels neighboring defective pixels are altered to minimize their visibility to the observer. In a first model, luminance error caused by a defect is compensated by adjust neighboring pixels. In a second model, Error in luminance and one of the two chrominance channels is compensated by adjusting neighboring pixels. The defect mitigation methods seek to shift the errors introduced by defective pixels into high spatial frequency elements and chromatic elements, which the human eye is not sensitive to.
1. A method of defect mitigation in display panels comprising:
mapping defective pixels in a display panel, including identifying always-on and always-off pixels as some of the defective pixels,
associating the mapped defective pixels with the display panel, and
altering the image displayed on pixels surrounding the mapped defective pixels based on a correction model, including changing values of the pixels surrounding a particular defective pixel such that the values of the pixels that are immediately adjacent to the particular defective pixel are changed by a greater amount than the values of the pixels that are further away from the particular defective pixel.
2. The method of claim 1 where the altering includes compensating for a luminance error of each of the defective pixels using surrounding pixel value changes.
3. The method of claim 1 where the altering includes compensating for a luminance error and one of two channels of chromatic error of each of the defective pixels using surrounding pixel value changes.
4. The method of claim 1 where the mapping includes recording defect information, the defect information comprising pixel location and defect type.
5. The method of claim 4 where the defect information recorded comprises at least pixel locations and display gamma, and chromaticity of the primaries.
6. The method of claim 4 where the defect information recorded comprises at least pixel locations, pixel luminance, and pixel chrominance.
7. The method of claim 1 where the altering includes altering only pixel values of neighboring pixels of each mapped defective pixel.
8. The method of claim 7 where the altering only the pixel values of the neighboring pixels includes altering only the pixel values of the neighboring pixels of the same color as the each mapped defective pixel.