System and method for color space setting adjustment
First Claim
Patent Images
1. A system, comprising:
- a liquid crystal display (LCD) panel having a native transfer function to transform a plurality of adjusted input values and output a plurality of gamma corrected input values and a native light output function to transform the gamma corrected input values into a plurality of light output levels;
an LCD backlight having a plurality of light emitting diode (LED) modules; and
a color gamut mapping engine to adjust a plurality of input values corresponding to a video signal and output a plurality of adjusted input values such that the transformation of the adjusted input values to the light output levels complies with at least one color space setting specified by a user; and
a color calibration user interface to allow the user to modify the at least one color space setting,in which the color gamut mapping engine further comprises;
a device compensation block comprising;
at least one matrix multiplier to multiply the gamma corrected input value associated with each of the input values by a transformation matrix and output a plurality of multiplied input values; and
an inverse native transfer function to apply an inverse of the native transfer function to the multiplied input values and output the adjusted input values;
in which the transformation matrix is a combination of an inverse of the native light output function and a light output function corresponding to the transfer function specified by the at least one color space setting.
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Abstract
Disclosed are various systems and methods of color space setting adjustment. In one embodiment, a system includes an LED RGB backlight as well as a color gamut mapping engine configured to adjust a plurality of input values and output a plurality of adjusted input values to an LCD panel having a native transfer function such that the transformation of the adjusted input values to visible light displayed by the LCD panel complies with user defined color space settings.
7 Citations
17 Claims
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1. A system, comprising:
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a liquid crystal display (LCD) panel having a native transfer function to transform a plurality of adjusted input values and output a plurality of gamma corrected input values and a native light output function to transform the gamma corrected input values into a plurality of light output levels; an LCD backlight having a plurality of light emitting diode (LED) modules; and a color gamut mapping engine to adjust a plurality of input values corresponding to a video signal and output a plurality of adjusted input values such that the transformation of the adjusted input values to the light output levels complies with at least one color space setting specified by a user; and a color calibration user interface to allow the user to modify the at least one color space setting, in which the color gamut mapping engine further comprises; a device compensation block comprising; at least one matrix multiplier to multiply the gamma corrected input value associated with each of the input values by a transformation matrix and output a plurality of multiplied input values; and an inverse native transfer function to apply an inverse of the native transfer function to the multiplied input values and output the adjusted input values; in which the transformation matrix is a combination of an inverse of the native light output function and a light output function corresponding to the transfer function specified by the at least one color space setting. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method, comprising:
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receiving at least one color space setting; receiving a plurality of input values corresponding to a video signal; applying at least one transfer function to the input values and outputting a plurality of gamma corrected input values; and compensating the gamma corrected input values and outputting a plurality of adjusted input values to a liquid crystal display (LCD) panel having a native transfer function and a native light output function; in which the adjusted input values result in transformation from the input values to light output by the LCD panel according to the at least one color space setting; and in which compensating the gamma corrected input values further comprises; performing a matrix multiplication operation of the gamma corrected input values by a transformation matrix and outputting multiplied input values; and applying an inverse of the native transfer function to the multiplied input values and outputting the adjusted input values; in which the transformation matrix further comprises a combination of an inverse of the native light output function and a light output function corresponding to a specified output device specification. - View Dependent Claims (12, 13, 14)
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15. A non-transitory computer readable media executable in a computing system, comprising:
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logic that receives at least one color space setting; logic that receives a plurality of input values corresponding to a video signal; logic that applies at least one transfer function to the input values and outputting a plurality of gamma corrected input values; logic that compensates the gamma corrected input values and outputting a plurality of adjusted input values to a liquid crystal display (LCD) panel having a native transfer function and a native light output function; in which the adjusted input values result in transformation from the input values to light output by the LCD panel according to the at least one color space setting; and in which the logic that compensates the gamma corrected input values comprises; logic that performs a matrix multiplication operation of the gamma corrected input values by a transformation matrix and outputs multiplied input values; logic that applies an inverse of the native transfer function to the multiplied input values and outputs the adjusted input values in which the transformation matrix further comprises a combination of an inverse of the native light output function and a light output function corresponding to a specified output device specification; in which the transformation matrix further comprises a combination of an inverse of the native light output function and a light output function corresponding to a specified output device specification; in which the transformation matrix is a combination of an inverse of the native light output function and a light output function corresponding to the transfer function specified by the at least one color space setting. - View Dependent Claims (16, 17)
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Specification