Method and device for compensating luminance deviation and display device using the same
AssigneeLG Display Co., Ltd.
InventorsGeon Ho Park, Won Yeol Lee, Cheon Heo
Life of this patent
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Abstract
The present disclosure relates to a method and a device for compensating for a luminance deviation. A difference in pixel value of the image capturing device between a first pixel and a second pixel in the screen and a difference in gray scale level between first and second gray scale levels are derived from a captured image at the first gray scale level and a captured image at the second gray scale level which include pixel values of the image capturing device. A pixel value for the second pixel is calculated from the captured image at the first gray scale level.
Claims12
A method for compensating a luminance deviation using an image capturing device which captures an image of a screen of a display panel, the method comprising:
- inputting a first input image having first gray scale level data to pixels disposed in the screen of the display panel to capture a first image of the screen, and inputting a second input image having second gray scale level data to the pixels to capture a second image of the screen;
- deriving a difference in pixel values of the image capturing device between a first pixel and a second pixel in the screen and a difference in gray scale level between the first and second gray scale levels from a first captured image at the first gray scale level and a second captured image at the second gray scale level which include the pixel values of the image capturing device;
- calculating a pixel value for the second pixel from the first captured image at the first gray scale level;
- and
- converting the difference in pixel values of the image capturing device between the first pixel and the second pixel at the first gray scale level to a difference in gray scale levels to derive compensation data of the second pixel using the difference in the pixel values of the image capturing device and the difference in gray scale levels,
- wherein each of the pixel values of the image capturing device includes a digital value output from an image sensor pixel of the image capturing device.
A luminance deviation compensation device comprising:
- an image capturing device configured to capture an image of a screen of a display panel and output a captured image expressed with pixel values;
- a display panel in which pixels are disposed;
- a pixel driver configured to write an input image data to the pixels;
- and
- a luminance deviation compensator which generates a first input image having first gray scale level data, receives a first captured image at a first gray scale level from the image capturing device, inputs a second input image having second gray scale level data, and receives a second captured image at a second gray scale level from the image capturing device,
- wherein the luminance deviation compensator derives a difference in pixel value of the image capturing device between a first pixel and a second pixel and a difference in gray scale level between the first and second gray scale levels from the first captured image at the first gray scale level and the second captured image at the second gray scale level,
- calculates a pixel value for the second pixel from the first captured image at the first gray scale level, and
- converts the difference in pixel values of the image capturing device between the first pixel and the second pixel at the first gray scale level to a difference in gray scale levels to derive compensation data of the second pixel using the difference in the pixel values of the image capturing device and the difference in the gray scale levels,
- wherein each of the pixel values of the image capturing device includes a digital value output from an image sensor pixel of the image capturing device.
Dependencies are inferred from the claim text.