Method and system for aperture expansion in light field displays

Kai Ojala (Inventor), Jukka-Tapani Mäkinen (Inventor)

    Research output: PatentPatent application


    Display methods and apparatus are described. In some embodiments, to generate an image, light is selectively emitted from one or more light-emitting elements (such as a MuLEDs) in a light-emitting layer. The emitted light from each element is collimated using, for example, an array of microlenses having small apertures. Each beam of collimated light is split by a first diffractive grating into a first generation of child beams, and the first generation of child beams is split by a second diffractive grating into a second generation of child beams. Beams in the second generation of child beams that are not parallel to the original beam of collimated light may be blocked by a spatial light modulator (e.g. an LCD panel). The un-blocked beams operate in some respects as if they had been generated using optics with an aperture larger than the apertures of the microlenses.
    Original languageEnglish
    Patent numberWO2019089283 A1
    IPCG02B 27/00 ,G02B 27/22 ,H04N 13/305 ,H04N 13/363
    Priority date2/11/17
    Filing date23/10/18
    Publication statusPublished - 9 May 2019
    MoE publication typeNot Eligible


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