Que no me vengas con líos, SONOMAN. Que lo que tú estás diciendo aplica SOLO a paneles LCD (y no a todos, solo a una serie de paneles W-RGB de LG). NO A OLED.

NO MAREES LA PERDIZ. NO CONFUNDAS A LA GENTE.

Te copio de nuevo la información, parece que no quieres entenderlo:

Unlike LG's OLED TVs, in which each pixel includes a white sub-pixel in addition to red, green, blue, its RGBW LCDs are based on a scheme where every fourth sub-pixel in a row is white, which means that each white sub-pixel is shared by adjacent pixels. This arrangement requires the panel to jump through some hoops in order to render 3840x2160 UHD video.
¿Lo entiendes, o no?