Patent ID: 8531380

Claim:
A method for modifying display backlight target values, said method comprising: a) receiving an initial backlight target value image, BL 0 ; b) establishing an initial LED driving value (led 0 ) image comprising on-grid LED points and off-grid virtual points located between said on-grid LED points of said initial backlight target value image by convolving said BL 0 image with an LED mask comprising said virtual point off-grid locations; c) determining an approximated backlight image (bl 1 ) by convolving said led 0 image with a truncated point spread function (psf 2 ) kernel; d) determining a backlight deficiency image (bl 2 ), based on a difference between said BL 0 image and said bl 1 image; e) creating a compensated backlight image (bl 3 ) by convolving said bl 2 image with a diffusion kernel; and f) determining a modified LED target value image (BL 1 ) by adding said bl 3 image to said BL 0 image.