US 11,727,843 B2
Device and method for display brightness control
Takashi Nose, Kanagawa (JP); Hirobumi Furihata, Tokyo (JP); and Masao Orio, Tokyo (JP)
Assigned to Synaptics Incorporated, San Jose, CA (US)
Filed by Synaptics Incorporated, San Jose, CA (US)
Filed on Oct. 19, 2021, as Appl. No. 17/505,550.
Prior Publication US 2023/0118354 A1, Apr. 20, 2023
Int. Cl. G09G 3/20 (2006.01)
CPC G09G 3/20 (2013.01) [G09G 2310/0243 (2013.01); G09G 2320/0626 (2013.01); G09G 2320/0673 (2013.01); G09G 2320/0686 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A display driver, comprising:
image processing circuitry configured to:
generate first voltage data for a first pixel in a first screen area of a display panel using a first gamma parameter set that defines a first gamma curve for the first screen area,
responsive to a second screen area brightness control instruction being activated, generate second voltage data for a second pixel in a second screen area of the display panel using a second gamma parameter set that defines a second gamma curve for the second screen area,
determine an interpolated gamma parameter set for a third pixel in a connection area of the display panel through interpolation between the first gamma parameter set and the second gamma parameter set, the connection area being disposed between the first screen area and the second screen area, generate third voltage data for the third pixel using the interpolated gamma parameter set, and
generate fourth voltage data for the second pixel in the second screen area using the first gamma parameter set in response to the second screen area brightness control instruction being deactivated; and
drive circuitry configured to:
update the first pixel in the first screen area based on the first voltage data,
update the second pixel in the second screen area based on the second voltage data, and
update the third pixel in the connection area based on the third voltage data.