US 12,033,572 B2
Device and method for driving a display panel to improve voltage drop compensation
Masao Orio, Tokyo (JP); Hirobumi Furihata, Tokyo (JP); and Takashi Nose, Kanagawa (JP)
Assigned to Synaptics Incorporated, San Jose, CA (US)
Filed by Synaptics Incorporated, San Jose, CA (US)
Filed on Nov. 8, 2021, as Appl. No. 17/521,646.
Prior Publication US 2023/0142900 A1, May 11, 2023
Int. Cl. G09G 3/3208 (2016.01)
CPC G09G 3/3208 (2013.01) [G09G 2320/0233 (2013.01); G09G 2320/0242 (2013.01); G09G 2320/0673 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A display driver, comprising:
image processing circuitry configured to:
determine a total current of a display panel, and
perform an IR-drop compensation using the total current and a first graylevel for a first subpixel of the display panel to determine a first voltage level for the first subpixel using gamma voltage data, gain data, and offset data,
wherein the total current is used to determine the gain data, the total current and the first graylevel of the first subpixel are used to determine the offset data, and the offset data corresponds to a difference in luminance between a foreground image and a background image; and
drive circuitry configured to update the first subpixel based at least in part on the first voltage level.