Image Display Device And Image Display Method
First Claim
1. An image display device provided with a display panel including a plurality of display elements, the device having a full display function for displaying an image based on an externally provided input image on the entire display panel and a partial display function for displaying an image based on the input image in a partial region of the display panel, the device comprising:
- a backlight including a plurality of light sources;
an emission luminance calculation section for dividing the input image into the same number of areas as the light sources and obtaining an emission luminance which is a luminance upon emission of the light source corresponding to each area;
a display luminance calculation section for calculating a display luminance for each area on the basis of the emission luminance of the light source corresponding to that area and emission luminances of light sources corresponding to predetermined areas surrounding that area, the display luminance being a luminance achievable upon display in that area;
a display position information acquisition section for acquiring display position identification data to identify a display region in which the image based on the input image should be displayed when performing partial display;
a correction filter having correction values stored therein in association with the areas or the display elements, the correction values being values determined in accordance with the display region identified by the display position identification data;
a display data calculation section for calculating display data for controlling a light transmittance of each display element, on the basis of the input image, the display luminance, and the correction values stored in the correction filter;
a panel driver circuit for outputting a light transmittance control signal for controlling the light transmittance of each display element to the display panel, on the basis of the display data; and
a backlight driver circuit for outputting a luminance control signal for controlling the luminance of each light source to the backlight, on the basis of the emission luminance.
1 Assignment
0 Petitions
Accused Products
Abstract
A display position information acquisition section of an image display device outputs display position identification data for identifying a display position on the screen. An LED output value calculation section divides an input image into a plurality of areas and obtains LED data which is data for emission luminances of LEDs in the areas. At this time, emission luminances of LEDs in a non-display area are set to 0 on the basis of the display position identification data. A display luminance calculation section obtains display luminances of the areas based upon the emission luminances. A partial display correction filter generation section generates a partial display correction filter having correction data for each pixel stored therein, based upon the display position identification data. An LCD data calculation section obtains liquid crystal data based upon the input image, the display luminances, and the correction data.
29 Citations
16 Claims
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1. An image display device provided with a display panel including a plurality of display elements, the device having a full display function for displaying an image based on an externally provided input image on the entire display panel and a partial display function for displaying an image based on the input image in a partial region of the display panel, the device comprising:
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a backlight including a plurality of light sources; an emission luminance calculation section for dividing the input image into the same number of areas as the light sources and obtaining an emission luminance which is a luminance upon emission of the light source corresponding to each area; a display luminance calculation section for calculating a display luminance for each area on the basis of the emission luminance of the light source corresponding to that area and emission luminances of light sources corresponding to predetermined areas surrounding that area, the display luminance being a luminance achievable upon display in that area; a display position information acquisition section for acquiring display position identification data to identify a display region in which the image based on the input image should be displayed when performing partial display; a correction filter having correction values stored therein in association with the areas or the display elements, the correction values being values determined in accordance with the display region identified by the display position identification data; a display data calculation section for calculating display data for controlling a light transmittance of each display element, on the basis of the input image, the display luminance, and the correction values stored in the correction filter; a panel driver circuit for outputting a light transmittance control signal for controlling the light transmittance of each display element to the display panel, on the basis of the display data; and a backlight driver circuit for outputting a luminance control signal for controlling the luminance of each light source to the backlight, on the basis of the emission luminance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An image display method in an image display device provided with a display panel including a plurality of display elements and a backlight including a plurality of light sources, the device having a full display function for displaying an image based on an externally provided input image on the entire display panel and a partial display function for displaying an image based on the input image in a partial region of the display panel, the method comprising:
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an emission luminance calculation step for dividing the input image into the same number of areas as the light sources and obtaining an emission luminance which is a luminance upon emission of the light source corresponding to each area; a display luminance calculation step for calculating a display luminance for each area on the basis of the emission luminance of the light source corresponding to that area and emission luminances of light sources corresponding to predetermined areas surrounding that area, the display luminance being a luminance achievable upon display in that area; a display position information acquisition step for acquiring display position identification data to identify a display region in which the image based on the input image should be displayed when performing partial display; a display data calculation step for calculating display data for controlling a light transmittance of each display element, on the basis of correction values, the input image, and the display luminance, the correction values being values determined in accordance with the display region identified by the display position identification data and being stored in a predetermined correction filter in association with the areas or the display elements; a panel drive step for outputting a light transmittance control signal for controlling the light transmittance of each display element to the display panel, on the basis of the display data; and a backlight drive step for outputting a luminance control signal for controlling the luminance of each light source to the backlight, on the basis of the emission luminance. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification