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

Claim 13:
14. A display comprising:
a backlight including a plurality of light-emitting regions that are configured in a matrix form and independently operable;
a liquid crystal panel coupled to the backlight panel and including a plurality of pixels; and
a controller configured to:
generate luminance data that indicates a luminance value for each of the light-emitting regions of the backlight based on a maximum gradation value among gradation values of image pixels of an input image that correspond to the light-emitting region;
apply a special filter to the luminance data, such that, with respect to each of the light-emitting regions, a difference of the luminance value thereof from the luminance values of neighboring light-emitting regions thereof decreases, to generate luminance setting data;
generate gradation setting data that sets a gradation value of each of the pixels of the liquid crystal panel for the input image, based on the input image and the luminance setting data; and
control 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 controller is configured to, during application of the special filter, with respect to each of the light-emitting regions of the backlight, calculate 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 light-emitting regions multiplied by weighting factors of the special filter corresponding thereto, respectively, and
the controller is configured to, during generation of the gradation setting data:
generate luminance estimation data that indicates an estimated luminance value of backlight for the input image with respect to each of the pixels of the liquid crystal panel based on the luminance setting data and luminance distribution data indicating a luminance distribution in each of the light-emitting regions of the backlight panel; and
perform correction of gradation values of image pixels indicated by the input image using the luminance estimation data, to generate the gradation setting data.