Hue-adaptive saturation increase for OLED display power reduction
A processing system adjusts a saturation component of a hue-saturation-value (HSV) color space pixel input for an organic light emitting diode (OLED) display panel as a function of the hue component. The processing system converts components of a pixel input from a non-HSV color space to HSV components of the pixel input in HSV color space and modifies the saturation component of the pixel input in HSV color space based on the hue component of the pixel input to generate modified HSV components of the pixel input. The processing system then converts the modified HSV components of the pixel input back into the original color space to produce modified components of the pixel input in the original color space and provides the modified components of the pixel input for receipt by the OLED display, allowing the pixel to be driven at a lower pixel value while maintaining perceptual quality.
1. A device, comprising:
a processor to:
decrease a value component of a pixel input in hue-saturation-value (HSV) color space to generate a decreased value component;
modify a saturation component of the pixel input based on a hue-adaptive non-linear saturation mapping function to generate a modified saturation component to offset the decrease in the value component;
generate modified HSV components of the pixel input comprising the decreased value component and the modified saturation component; and
provide an output to an organic light emitting diode (OLED) display panel based on the modified HSV components of the pixel input.
2. The device of claim 1 , the processor to:
convert components of the pixel input for the OLED display panel from a first color space to hue-saturation-value (HSV) components of the pixel input in HSV color space; and
convert the modified HSV components of the pixel input to modified components of the pixel input in the first color space for output to the OLED display panel.
3. The device of claim 1 , wherein the processor selects the hue-adaptive non-linear saturation mapping function from a plurality of non-linear saturation mapping functions based on a hue component of the pixel input, wherein the plurality of non-linear saturation mapping functions comprises a first non-linear saturation mapping function corresponding to a green hue, a second non-linear saturation mapping function corresponding to a blue hue, and a third non-linear saturation mapping function corresponding to a red hue.
4. The device of claim 1 , wherein the processor is to interpolate points of a three-dimensional (3D) look up table (LUT) to generate the modified saturation component, wherein the 3D LUT comprises a first number of entries along a first axis, a second number of entries along a second axis, and a third number of entries along a third axis.
5. The device of claim 1 , wherein the hue-adaptive non-linear saturation mapping function is based on a hue-adaptive slope increase function, wherein the hue-adaptive slope increase function is a product of a maximum slope as a function of a hue component of the pixel input and a saturation increase slope shape as a function of the hue component and the value component.