Patent ID: 8681189

Claim:
A method for displaying an image on a display having a light source modulation layer and a display modulation layer, the method comprising: receiving a frame of image data; determining light source modulator control values for the light source modulation layer, based at least on the image data; estimating a minimum and maximum luminance received at the display modulation layer; extracting a section of a perceptual curve that maps luminance values to display modulator control values, the extracted section of the perceptual curve having luminance values extending between the estimated minimum and maximum luminance; mapping the luminance values of the extracted section of the perceptual curve to an available range of display modulator control values for the display modulation layer to determine a desired-total response curve; determining display modulator control values for the display modulation layer based at least on the image data and the desired-total response curve; displaying the image by outputting the display modulator control values to the display modulation layer and the light source modulator control values to the light source modulation layer; and obtaining calibration data which relates display modulator control values to corresponding output of the display modulation layer; wherein determining display modulator control values is based at least on the calibration data; and wherein determining display modulator control values comprises: adjusting the desired-total response curve based on the calibration data to obtain an encoding curve which relates input image data values to output display modulator control values; and applying the encoding curve to the image data to obtain the display modulator control values used to display the image.