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US 12,651,580 B2Granted
Backlight reconstruction and compensation
AssigneeApple Inc.
InventorMahesh B. Chappalli
Life of this patent
Estimating the term…
Abstract
A processor or other circuitry may obtain emissive element strength information for an array of emissive elements of an electronic display. The processor or other circuitry may reconstruct backlight information at multiple locations within the electronic display. The processor or other circuitry also compensates display of image data based at least in part on the reconstructed backlight information.
Claims20
A system, comprising:
- a plurality of emissive elements;
- brightness estimation circuitry configured to estimate brightnesses of addressable backlight zones of the plurality of emissive elements based at least in part on pixel values of image data;
- a backlight reconstruction and compensation system, comprising:
- backlight reconstruction circuitry configured to:
- receive emissive element strength information for the plurality of emissive elements;
- receive the estimated brightnesses of the addressable backlight zones of the plurality of emissive elements from the brightness estimation circuitry;
- generate brightnesses at a plurality of grid points based at least in part on the emissive element strength information and the estimated brightnesses of the addressable backlight zones;
- and
- calculate pixel gains based at least in part on the brightnesses at the plurality of grid points;
- and
- backlight compensation circuitry configured to:
- receive the pixel gains from the backlight reconstruction circuitry;
- receive the image data;
- and
- adjust pixels of the image data using the pixel gains to compensate for backlight variance of the brightnesses at the plurality of grid points.
12 more elements
A method for operating a backlight comprising:
- estimate, in brightness estimation circuitry, brightnesses of addressable backlight zones of a plurality of emissive elements in the backlight based at least in part on pixel values of image data;
- receive, in backlight reconstruction circuitry, emissive element strength information for the plurality of emissive elements;
- receive, in the backlight reconstruction circuitry, the estimated brightnesses of the addressable backlight zones of the plurality of emissive elements from the brightness estimation circuitry;
- generate, in the backlight reconstruction circuitry, brightnesses at a plurality of grid points based at least in part on the emissive element strength information and the estimated brightnesses of the addressable backlight zones;
- calculate, in the backlight reconstruction circuitry, pixel gains based at least in part on the brightnesses at the plurality of grid points;
- receive, in backlight compensation circuitry, the pixel gains from the backlight reconstruction circuitry;
- receive, in the backlight compensation circuitry, the image data;
- and
- adjust, in the backlight compensation circuitry, pixels of the image data using the pixel gains to compensate for backlight variance of the brightnesses at the plurality of grid points.
6 more elements
A tangible, non-transitory, and computer-readable medium having stored thereon instructions, that when executed are configured to cause a processor to:
- obtain emissive element strength information for a plurality of emissive elements of an electronic display, wherein the emissive element strength information comprises singular value decomposition sets for the electronic display, and the singular value decomposition sets each comprise decomposed horizontal and vertical weights;
- receive an estimated brightnesses of addressable backlight zones of the plurality of emissive elements from brightness estimation circuitry;
- generate brightnesses at a plurality of grid points based at least in part on the emissive element strength information and the estimated brightnesses of the addressable backlight zones;
- calculate pixel gains based at least in part on the brightnesses at the plurality of grid points;
- and
- adjust pixels of image data using the pixel gains to compensate for backlight variance of the brightnesses at the plurality of grid points.
3 more elements
Dependencies are inferred from the claim text.