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    POLYCHROMATIC GRATING-COUPLED BACKLIGHTING
    66.
    发明公开
    POLYCHROMATIC GRATING-COUPLED BACKLIGHTING 审中-公开

    公开(公告)号：EP3345046A1

    公开(公告)日：2018-07-11

    申请号：EP16842446.3

    申请日：2016-02-26

    Applicant: LEIA Inc.

    Inventor： FATTAL, David A. ,  MA, Ming

    IPC: G02F1/13357

    CPC classification number: G02B6/0016 ,  G02B6/0035 ,  G02F1/133621

    Abstract: Polychromatic backlighting employs a grating coupler to diffractively split and redirect collimated light coupled into a light guide. A polychromatic grating-coupled backlight includes a light guide configured to guide light and a light source to provide collimated polychromatic light. The polychromatic grating-coupled backlight further includes the grating coupler diffractively split and redirect to provide a plurality of light beams. Each light beam of the plurality represents a respective different color of the polychromatic light and is configured to propagate within the light guide as guided light at a color-specific, non-zero propagation angle corresponding to the respective different color of polychromatic light. An electronic display includes the polychromatic grating-coupled backlight and further includes a diffraction grating to diffractively couple out a portion of the guided light and a light valve array to modulate the coupled-out light as an electronic display pixel.

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