Patent ID: 8462101

Claim:
An apparatus for controlling a backlight of a display panel of a camera system, the apparatus comprising: a sub-pixel extracting unit which extracts sub-pixel luminance values from image data, wherein the image data is indicative of a current image frame defined by a plurality of pixels, and wherein each of the pixels includes a plurality of sub-pixels; an ambient light luminance calculating unit which calculates an ambient light luminance value of the current image frame from the sub-pixel luminance values extracted by the sub-pixel extracting unit; and a backlight controller which generates a backlight control signal based on a comparison between the calculated ambient light luminance value of the current image frame and an ambient light luminance value of a previous image frame, wherein the sub-pixel extracting unit divides the image data into a plurality of regions each including a plurality of pixels, and extracts the luminance values of a portion of the sub-pixels of a same color contained in each of the plurality of regions, wherein the plurality of pixels each include a plurality of different colored sub-pixels.