Patent ID: 8514352

Claim:
A phosphor-based multi-coloured display, comprising: a spatial light modulator comprising an addressable array of apertures each corresponding to a respective sub-pixel in the display; an array of phosphor regions each indexed to a corresponding aperture of the spatial light modulator; and a backlight which provides quasi-monochromatic light to phosphor within each of the phosphor regions, wherein the phosphor within each of the phosphor regions, upon being excited by the quasi-monochromatic light of the backlight, emits light having a colour different from a colour of the quasi-monochromatic light, through the corresponding aperture of the spatial light modulator, and the backlight comprises a lightguide and a quasi-monochromatic light source which introduces the light into the lightguide from a side of the lightguide, and the array of phosphor regions is located directly above the lightguide such that light is extracted directly from the lightguide into the phosphor regions.