Patent ID: 7932883
Filing Date: 2011-04-26
Classification: G09G

Abstract:
1. A method of mapping a four-primary input signal (IS) to sets (Pij) of four sub-pixels (RPij, GPij, BPij, WPij) of a display device (DD), wherein the four-primary input signal (IS) comprises a sequence of input samples (Sij) each comprising a value for a first component (Rlij), a value for a second component (Glij), a value for a third component (Blij), and a value for a fourth component (Wlij), and wherein the sets (Pij) of the four sub-pixels comprise a first sub-pixel (RPij) for supplying light having a first primary color (R), a second sub-pixel (GPij) for supplying light having a second primary color (G), a third sub-pixel (BPij) for supplying light having a third primary color, and a fourth sub-pixel (WPij) for supplying fourth light having a fourth color (W), the first, second, third and fourth color all being different, and the fourth color being within the color gamut of the first, second, and third color, the method comprising sub-sampling (MAP) the input samples (Sij) of the four primary input signal (IS) (i) by assigning, via mapping, a first component (RI