US 11,837,181 B2
Color balancing in display of multiple images
Masahiko Monomoshi, Itano-gun (JP)
Assigned to Nichia Corporation, Anan (JP)
Filed by NICHIA CORPORATION, Anan (JP)
Filed on Feb. 22, 2022, as Appl. No. 17/677,645.
Claims priority of application No. 2021-030118 (JP), filed on Feb. 26, 2021; and application No. 2021-185558 (JP), filed on Nov. 15, 2021.
Prior Publication US 2022/0277699 A1, Sep. 1, 2022
Int. Cl. G09G 3/20 (2006.01); G09G 3/36 (2006.01); G09G 3/34 (2006.01)
CPC G09G 3/3426 (2013.01) [G09G 3/36 (2013.01); G09G 2320/0626 (2013.01); G09G 2340/16 (2013.01); G09G 2360/06 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An image display method comprising:
with respect to each of a plurality of input images,
generating luminance setting data that sets a luminance value for each of a plurality of light-emitting regions of a backlight configured in a matrix form based on the input image;
generating gradation setting data that sets a gradation value for each of a plurality of pixels of a liquid crystal panel coupled to the backlight, based on the generated luminance setting data and the input image; and
controlling the backlight to operate based on the luminance setting data and the liquid crystal panel to operate based on the gradation setting data to display an image corresponding to the input image, wherein
the luminance setting data for a first input image among the plurality of input images is generated based on the first input image and the luminance setting data for a second input image immediately preceding the first input image,
said generating luminance setting data comprises, with respect to the first input image:
generating luminance data for the first input image that indicates a tentative luminance setting value for each of the plurality of light-emitting regions of the backlight based on the first input image, the tentative luminance setting value being a luminance value converted from a maximum gradation value among gradation values of pixels of the first input image that corresponds to the light-emitting region; and
generating the luminance setting data for the first input image based on an average of the luminance data for the first input image and the luminance setting data for the second input image, with respect to each of the plurality of light-emitting regions, and
said generating gradation setting data comprises, with respect to the first input image:
with respect to each of the pixels of the liquid crystal panel,
determining an estimated luminance value of the backlight based on a luminance value of a corresponding light-emitting region of the backlight set in the luminance setting data for the first input image and luminance distribution data indicating distribution of luminance in the corresponding light-emitting region; and
modifying a gradation value of the pixel indicated by the first input image using the estimated luminance value.