Luminance point correction without luminance degradation
AssigneeApple Inc.
InventorsKok Chen, Gabriel Marcu
Life of this patent
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Abstract
White point is corrected without degrading luminance on a display device. A white point manager modifies the balance between red, green and blue according to a target white point up to a threshold gray value. As the gray scale approaches white from the threshold gray value, the white point manager blends the balance between red, green and blue from the target white point substantially towards the native white point for the display device, so as not to degrade luminance as the gray scale approaches white.
Claims40
A method for correcting white point without degrading luminance on a display device, the display device having a native luminance point, the method comprising:
- for a first set of gray values occupying a first side of a threshold gray value, modifying a balance among a plurality of constituent color components according to a target white point;
- and
- for a second set of gray values occupying a second side of the threshold gray value, blending the balance among the plurality of constituent color components from the target white point substantially towards the native luminance point for the display device.
A system for correcting white point without degrading luminance on a display device, the display device having a native luminance point, the system comprising:
- logic configured to modify a balance among a plurality of constituent color components according to a target white point, for a first set of gray values occupying a first side of a threshold gray value;
- and
- logic configured to blend the balance among the plurality of constituent color components from the target white point substantially towards the native luminance point for the display device, for a second set of gray values occupying a second side of the threshold gray value.
A system for correcting white point without degrading luminance on a display device, the display device having a native luminance point, the system comprising:
- means for modifying a balance among a plurality of constituent color components according to a target white point, for a first set of gray values occupying a first side of a threshold gray value;
- and
- means for blending the balance among the plurality of constituent color components from the target white point substantially towards the native luminance point for the display device, for a second set of gray values occupying a second side of the threshold gray value.
A computer program product for correcting white point without degrading luminance on a display device, the display device having a native luminance point, the computer program product comprising:
- program code for modifying a balance among a plurality of constituent color components according to a target white point, for a first set of gray values occupying a first side of a threshold gray value;
- program code for blending the balance among the plurality of constituent color components from the target white point substantially towards the native luminance point for the display device, for a second set of gray values occupying a second side of the threshold gray value;
- and
- a computer readable medium on which the program codes are stored.
A method for correcting white point without degrading luminance on a display device, the display device having a native luminance point, the method comprising:
- determining at least one threshold gray value within a range of input values of the display device;
- for at least a first set of gray values occupying a first side of the threshold gray value, modifying a balance among a plurality of constituent color components according to a target white point;
- and
- for at least a second set of gray values occupying a second side of the threshold gray value, blending the balance among the plurality of constituent color components from the target white point substantially towards the native luminance point for the display device.
Dependencies are inferred from the claim text.