US 12,327,528 B2
Compensating for colour vision deficiency of viewer
Oiva Arvo Oskari Sahlsten, Helsinki (FI); and Mikko Strandborg, Helsinki (FI)
Assigned to Varjo Technologies Oy, Helsinki (FI)
Filed by Varjo Technologies Oy, Helsinki (FI)
Filed on Jul. 31, 2023, as Appl. No. 18/361,971.
Prior Publication US 2025/0046261 A1, Feb. 6, 2025
Int. Cl. G09G 3/36 (2006.01); G09G 3/34 (2006.01); A61B 3/06 (2006.01)
CPC G09G 3/3413 (2013.01) [G09G 3/36 (2013.01); G09G 3/3607 (2013.01); A61B 3/066 (2013.01); G09G 2320/0233 (2013.01); G09G 2320/0626 (2013.01); G09G 2320/0666 (2013.01); G09G 2330/021 (2013.01); G09G 2354/00 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A backlight unit of a liquid crystal display device, the backlight unit comprising:
an array of light-emitting diodes (LEDs) of at least three different colours, wherein the LEDs are arranged as groups of LEDs within said array, each group comprising at least one LED of each of the at least three different colours;
a control circuit that is to be employed to control individual LEDs in said array; and
a controller configured to drive the control circuit to selectively decrease a brightness of LEDs of at least one of the at least three different colours in at least a part of said array;
wherein the controller is further configured to:
receive, from a gaze-tracking means, information indicative of a gaze direction of a user; and
select, based on the gaze direction of the user, the part of said array in which the brightness of the LEDs of the at least one of the at least three different colours is to be selectively decreased.