Operating sub-pixel rendering filters in a display system

A method of selectively providing spatial sampling filtering in a display system that processes image data signals representing both image areas that are sub-pixel rendered areas and image areas that are non-sub-pixel rendered areas, wherein the selectively provided spatial sampling filtering transforms the image data signals into spatially filtered signals, the method being implemented by the display system and comprising:

• detecting sub-pixel rendered areas of the image data signals by testing portions of the image data signals for satisfaction of a first condition, the first condition being satisfied when for a first pixel within one of the tested portions, a first color luminance defined by a corresponding portion of the image data signal for a first to-be-displayed sub-pixel-emitted color of the first pixel is not equal to a second color luminance defined by a corresponding portion of the image data signal for a second to-be-displayed, different and sub-pixel-emitted color of the first pixel and further when said second color luminances as averaged out due to respective sub-pixel emissons of the first pixel and successively adjacent other pixels in a predefined neighborhood of the given first pixel are substantially equal to one another;
• turning on, within the display system, a first set of spatial sampling filters for corresponding said subpixel rendered areas in response to the detecting of satisfaction of the first condition;
• and
• turning on a second set of different spatial sapling filters for corresponding non-sub-pixel rendered areas in response to failure of the detection of the satisfaction of the first condition.