Image display based on multiple brightness indicators
First Claim
Patent Images
1. Apparatus for controlling an illumination element of a backlight in a display, the apparatus comprising:
- a processor configured to;
for image data corresponding to an image, select from the image data a first subset of image data and a second subset of image data, wherein the subsets correspond respectively to a first region of the image and a second region of the image, wherein the second region encompasses the first region, and wherein the first region and the second region are at least partially illuminated according to a point spread function of the illumination element;
determine a first image brightness indication from the first subset of image data;
determine a second image brightness indication from the second subset of image data, the second image brightness indication different from the first image brightness indication; and
control the illumination element based at least in part on a combination of the first and second image brightness indication.
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Abstract
Methods for controlling light sources in displays in response to image data determine both a central tendency for brightness and an upper extreme for brightness of an area of an image. Brightness of a light source is controlled based upon both the central tendency and the upper extreme. Controllers in displays such as televisions, computer monitors, digital cinema and the like may control light source in a manner that reduces or avoids perceptible haloing.
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Citations
16 Claims
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1. Apparatus for controlling an illumination element of a backlight in a display, the apparatus comprising:
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a processor configured to; for image data corresponding to an image, select from the image data a first subset of image data and a second subset of image data, wherein the subsets correspond respectively to a first region of the image and a second region of the image, wherein the second region encompasses the first region, and wherein the first region and the second region are at least partially illuminated according to a point spread function of the illumination element; determine a first image brightness indication from the first subset of image data; determine a second image brightness indication from the second subset of image data, the second image brightness indication different from the first image brightness indication; and control the illumination element based at least in part on a combination of the first and second image brightness indication. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for controlling an illumination element in a display, the method comprising:
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for image data corresponding to an image, selecting from the image data a first subset of image data and a second subset of image data, wherein the subsets correspond respectively to a first region of the image and a second region of the image, wherein the second region encompasses the first region, and wherein the first region and the second region are at least partially illuminated according to a point spread function of the illumination element; determining a first image brightness indication from the first subset of image data; determining a second image brightness indication from the second subset of image data, the second image brightness indication different from the first image brightness indication; combining the first and second image brightness indications to yield a combination; and controlling the illumination element based at least in part on the combination. - View Dependent Claims (13, 14, 15, 16)
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Specification