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US 12,597,397 B2Granted
Image display device and image display method
AssigneeNichia Corporation
InventorMasahiko Monomoshi
Life of this patent
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Abstract
An image display device includes a planar backlight including a plurality of light-emitting regions, a display panel including a plurality of pixels, and a controller. The controller generates luminance setting data based on image data and data of positional correction coefficients. The controller generates luminance estimation data based on the luminance setting data, luminance profile data, and the data of the positional correction coefficients. The controller generates gradation setting data based on the image data and the luminance estimation data. The controller controls the planar backlight to operate based on the luminance setting data and the display panel to operate based on the gradation setting data to display an image corresponding to the image data.
Claims18
An image display device comprising:
- a backlight including a plurality of light-emitting regions arranged in one or more rows and one or more columns;
- a display panel coupled to the backlight and including a plurality of pixels;
- and
- a controller configured to, with respect to input image data:
- generate luminance setting data that sets a luminance value for each of the light-emitting regions of the backlight, based on:
- the input image data;
- and
- data of positional correction coefficients, which is a matrix having one or more rows and one or more columns that correspond to those of the backlight, values of the matrix being fixed values that are preset with respect to the plurality of light-emitting regions, respectively, for compensating luminance non-uniformity over an entirety of the plurality of light-emitting regions;
- generate luminance estimation data that indicates an estimated luminance value of the backlight operated in accordance with the luminance setting data with respect to each of the plurality of light-emitting regions, based on:
- the luminance setting data,
- luminance profile data indicating a luminance distribution of light emitted by a single light-emitting region of the backlight onto the single light-emitting region and adjacent light-emitting regions thereof, and
- the data of positional correction coefficients;
- generate gradation setting data that sets a gradation value for each of the pixels of the display panel, based on:
- the input image data, and
- the luminance estimation data;
- and
- control the backlight to operate based on the luminance setting data and the display panel to operate based on the gradation setting data to display an image corresponding to the input image data, wherein
- in the data of positional correction coefficients, a first positional correction coefficient for a first light-emitting region is greater than a second positional correction coefficient for a second light-emitting region,
- the first light-emitting region being an outermost one of the plurality of light-emitting regions and the second light-emitting region being not an outermost one of the plurality of light-emitting regions.
16 more elements
An image display method using:
- a backlight including a plurality of light-emitting regions arranged in one or more rows and one or more columns;
- and
- a display panel coupled to the backlight and including a plurality of pixels, the method comprising, with respect to input image data:
- generating luminance setting data that sets a luminance value for each of the light-emitting regions of the backlight, based on:
- the input image data;
- and
- data of positional correction coefficients, which is a matrix having one or more rows and one or more columns that correspond to those of the backlight, values of the matrix being fixed values that are preset with respect to the plurality of light-emitting regions, respectively, for compensating luminance non-uniformity over an entirety of the plurality of light-emitting regions;
- generating luminance estimation data that indicates an estimated luminance value of the backlight operated in accordance with the luminance setting data, with respect to each of the plurality of light-emitting regions, based on:
- the luminance setting data,
- luminance profile data indicating a luminance distribution of light emitted by a single light-emitting region of the backlight onto the single light-emitting region and adjacent light-emitting regions thereof, and
- the data of positional correction coefficients;
- generating gradation setting data that sets a gradation value for each of the pixels of the display panel, based on:
- the input image data, and
- the luminance estimation data;
- and
- controlling the backlight to operate based on the luminance setting data and the display panel to operate based on the gradation setting data to display an image corresponding to the input image data, wherein
- in the data of positional correction coefficients, a first positional correction coefficient for a first light-emitting region is greater than a second positional correction coefficient for a second light-emitting region,
- the first light-emitting region being an outermost one of the plurality of light-emitting regions and the second light-emitting region being not an outermost one of the plurality of light-emitting regions.
15 more elements
Dependencies are inferred from the claim text.