Cyclic redundancy check for electronic displays

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 a time threshold (TT) and a pixel threshold (PT), and providing the 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;
• using the electronic display processor to perform a checksum calculation of all pixel data within an active image area of the electronic display for an interval of time until reaching TT;
• using the electronic display processor to compare the checksum calculation for each interval of time to determine if the change in pixel data is less than PT;
• and
• performing an image retention prevention procedure by causing the display controller to modify the output of some portion of the pixels residing in the active image area when 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.

An electronic display assembly comprising:

• an electronic display;
• a display controller in electrical connection with the electronic display;
• a processor within the display controller that
• is provided with a time threshold (TT) and a pixel threshold (PT);
• is configured to transmit image pixel data to the electronic display such that an image will be produced on an active image area of the electronic display;
• is programmed to perform a checksum calculation of all pixel data within the active image area of the electronic display for an interval of time until reaching TT;
• is programmed to compare the checksum calculation for each interval of time to determine if the change in pixel data is less than PT;
• and
• is configured to perform an image retention prevention procedure for the active image area when the change in pixel data is determined to be less than PT by transmitting data other than image data to a portion of the pixels within the active image area such that the output of said portion of pixels will be modified, 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.