Patent ID: 11972739
Assignee: NICHIA CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 10:
11. An image display method comprising:
generating luminance data that indicates a luminance value for each of a plurality of sub-divided areas included in each of a plurality of light-emitting regions of a backlight configured in a matrix form based on a maximum gradation value among gradation values of image pixels of an input image that correspond to the light-emitting region, each of the light-emitting regions corresponding to one light-emitting element;
applying a special filter to the luminance data, such that, with respect to each of the sub-divided areas, a difference of the luminance value thereof from the luminance values of neighboring sub-divided areas thereof decreases, to generate post-filtering luminance data;
generating luminance setting data that sets a luminance value for each of the light-emitting regions of the backlight based on a maximum luminance value among luminance values of the sub-divided areas included in the light-emitting region indicated by the post-filtering luminance data;
generating gradation setting data that sets a gradation value of each of a plurality of pixels of a liquid crystal panel coupled to the backlight for the input image, based on the input image and the luminance setting data; 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 said applying a special filter comprises: with respect to each of the sub-divided areas of the light-emitting regions of the backlight, calculating a sum of the luminance value thereof multiplied by a weighting factor of the special filter corresponding thereto and the luminance values of the neighboring sub-divided areas multiplied by weighting factors of the special filter corresponding thereto, respectively.