An apparatus configured to drive a local-dimming display comprising one or more light modulators and a backlight, the backlight comprising one or more illumination sources and one or more light conversion layers wherein the one or more illumination sources are configured to emit first light including ultraviolet spectral components and/or blue light spectral components onto the one or more light conversion layers, the one or more light conversion layers being stimulated by the first light and converting of the first light into second light, the second light being white light, the one or more light conversion layers including at least one of quantum dots or phosphor materials, the one or more light modulators being configured to modulate the transmission of the second light through individual elements, the apparatus comprising: - means arranged to generate, based on input image data, drive signals for the one or more illumination sources of the backlight, - means (306,308) arranged to - control the one or more light modulators, - perform a light field simulation of the backlight and determine intermediate drive values for the one or more light modulators based on said light field simulation and based on the input image data, said light field simulation being obtained by modelling the one or more illumination sources of the backlight with a first point spread function for white light spectral components having little or no spatial color shift, - determine a compensation light field, said compensation light field being obtained by modelling the one or more illumination sources of the backlight with a second point spread function for yellow light spectral components to thereby compensate yellow color shifts caused by the first light bouncing back at the one or more light conversion layers, and being converted with less green and red as the distance from the center of the point spread function to the outer circumferences increases, - adjust the intermediate drive values for the one or more light modulators based on said compensation light field, wherein the means arranged to adjust the intermediate drive values comprises at least one of a scaler and lookup table. - means arranged to generate, based on input image data, drive signals for the one or more illumination sources of the backlight, - means (306,308) arranged to - control the one or more light modulators, - perform a light field simulation of the backlight and determine intermediate drive values for the one or more light modulators based on said light field simulation and based on the input image data, - determine a compensation light field, said compensation light field being obtained by modelling the one or more illumination sources of the backlight with a second point spread function for yellow light spectral components to thereby compensate yellow color shifts caused by the first light bouncing back at the one or more light conversion layers, and being converted with less green and red as the distance from the center of the point spread function to the outer circumferences increases, - adjust the intermediate drive values for the one or more light modulators based on said compensation light field,