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Cyclic redundancy check for electronic displays

  • US 10,319,271 B2
  • Filed: 03/22/2016
  • Issued: 06/11/2019
  • Est. Priority Date: 03/22/2016
  • Status: Active Grant
First Claim
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1. A method for preventing image retention in an electronic display having a display controller, and a processor within the display controller, the method comprising the steps of:

  • defining an analysis area (AA), a time threshold (TT), and a pixel threshold (PT), and providing the AA, TT and PT to the electronic display processor;

    using the electronic display processor to produce an image on an active display area of the electronic display by transmitting image pixel data to the electronic display;

    moving the AA, under the command of the electronic display processor, through every location of the active display area of the electronic display;

    using the electronic display processor to perform a checksum calculation of the pixel data within each location for an interval of time until reaching TT;

    using the electronic display processor to compare the checksum calculation for each location across each interval of time to determine if the change in pixel data is less than PT for each location; and

    performing an image retention prevention procedure by causing the display controller to modify the output of some portion of the pixels residing at any location where the change in pixel data is determined to be less than PT by transmitting data other than image data to said portion of the pixels, and cycling the pixels by subsequently retransmitting image data to the output-modified portion of the pixels and transmitting data other than image data to the remaining portion of the pixels.

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