US 12,340,767 B1
Local dimming for display devices with image warping function
Masao Orio, Tokyo (JP); Takashi Nose, Kanagawa (JP); Hirobumi Furihata, Tokyo (JP); Tomoo Minaki, Tokyo (JP); and Kazutoshi Aogaki, Kanagawa (JP)
Assigned to Synaptics Incorporated, San Jose, CA (US)
Filed by Synaptics Incorporated, San Jose, CA (US)
Filed on May 30, 2024, as Appl. No. 18/678,313.
Int. Cl. G09G 3/34 (2006.01); G09G 3/00 (2006.01)
CPC G09G 3/3406 (2013.01) [G09G 3/001 (2013.01); G09G 3/03 (2020.08); G09G 2300/0452 (2013.01); G09G 2320/0626 (2013.01); G09G 2340/0407 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method, comprising:
processing input image data to produce resulting image data corresponding to a resulting image such that a first region of the resulting image is filled with black pixels, wherein the resulting image is segmented into a plurality of zones that corresponds to a plurality of light sources of a backlight device configured to illuminate a display panel;
driving the display panel based on the resulting image data;
producing black pixel pattern data indicative of an arrangement of the black pixels in the resulting image;
determining, based on the black pixel pattern data, black pixel ratio data comprising a plurality of ratios for the plurality of zones, wherein the plurality of ratios comprises a ratio of a number of black pixels in a first zone of the plurality of zones to a total number of pixels of the first zone:
determining a compensation coefficient for the first zone based on comparing the ratio associated with the first zone with lookup table (LUT) ratios within a luminance compensation LUT; and
controlling, based on the resulting image data and the determined compensation coefficient, a luminance level of a first light source of the plurality of light sources, wherein the first light source is associated with the first zone.