US 12,217,722 B2
Frequency compensation for a display
Hyunchul Kim, San Jose, CA (US); Chien-Hui Wen, Cupertino, CA (US); and Ken Kok Foo, Sunnyvale, CA (US)
Assigned to Google LLC, Mountain View, CA (US)
Filed by Google LLC, Mountain View, CA (US)
Filed on Feb. 7, 2024, as Appl. No. 18/435,708.
Claims priority of provisional application 63/549,830, filed on Feb. 5, 2024.
Prior Publication US 2024/0177687 A1, May 30, 2024
Int. Cl. G09G 3/36 (2006.01); G09G 5/02 (2006.01)
CPC G09G 5/02 (2013.01) [G09G 2320/0233 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method comprising:
driving a display at a first frequency with a control signal via a device controller, the first frequency being a reference frequency;
measuring a first uniformity, at the first frequency, of multiple regions of the display in an XYZ domain at the reference frequency;
driving the display at a second frequency with the control signal via the device controller;
measuring a second uniformity, at the second frequency, of the multiple regions of the display in the XYZ domain;
generating a compensation mask to compensate for a difference between the second uniformity and the first uniformity;
generating a color model characterization based on the difference between the second uniformity and the first uniformity to generate a conversion formula;
converting data associated with the XYZ domain to Red Green Blue (RGB) data using the conversion formula; and
applying the RGB data and the compensation mask to the display with the display being driven at the second frequency to compensate for the difference between the first uniformity and the second uniformity.