Luminance compensation method and apparatus, and display device

  • US 11,069,285 B2
  • Filed: 07/17/2019
  • Issued: 07/20/2021
  • Est. Priority Date: 07/25/2018
  • Status: Active Grant
First Claim
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1. A luminance compensation method configured to compensate luminance of a plurality of sub-pixels included in a display device, the luminance compensation method comprising a curve generation and update process and a compensation process for each sub-pixel to be compensated, whereinthe curve generation and update process includes:

  • detecting an actual luminance value of the sub-pixel to be compensated in real time;

    wherein detecting an actual luminance value of the sub-pixel to be compensated in real time, includes;

    obtaining luminance data sensed by a photosensitive member corresponding to the sub-pixel to be compensated at least twice in a time of a frame, so as to obtain at least two sets of luminance data;

    determining a sensing time corresponding to each set of luminance data;

    estimating an estimated luminance value of the sub-pixel to be compensated at a current moment in a current frame according to a gray-scale value to be input to the sub-pixel to be compensated at the current moment;

    estimating an estimated sensing time required for the photosensitive member corresponding to the sub-pixel to be compensated to obtain luminance data corresponding to the estimated luminance value;

    selecting a set of luminance data with a sensing time closest to the estimated sensing time from the at least two sets of luminance data, anddetermining an actual luminance value of the sub-pixel to be compensated in the current frame according to the set of luminance data;

    generating an actual luminance curve showing how the actual luminance value of the sub-pixel to be compensated changes as a gray-scale value changes according to actual luminance values detected in real time; and

    updating the actual luminance curve;

    the compensation process includes;

    obtaining an ideal luminance value corresponding to a gray-scale value to be input to the sub-pixel to be compensated, the ideal luminance value being a luminance value of the sub-pixel to be compensated after the gray-scale value is input to the sub-pixel to be compensated in a case where a light-emitting device in the sub-pixel to be compensated is not aged; and

    calculating a gray-scale value corresponding to an actual luminance value that is equal to the obtained ideal luminance value according to the actual luminance curve of the sub-pixel to be compensated, the gray-scale value being used as a gray-scale value that will actually be input to the sub-pixel to be compensated.

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