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    DUAL SURFACE COLLIMATOR AND 3D ELECTRONIC DISPLAY EMPLOYING GRATING-BASED BACKLIGHTING USING SAME
    192.
    发明公开
    DUAL SURFACE COLLIMATOR AND 3D ELECTRONIC DISPLAY EMPLOYING GRATING-BASED BACKLIGHTING USING SAME 审中-公开

    公开(公告)号：EP3345042A1

    公开(公告)日：2018-07-11

    申请号：EP15903284.6

    申请日：2015-11-18

    Applicant: LEIA Inc.

    Inventor： MA, Ming ,  FATTAL, David A.

    IPC: G02B27/30 ,  G02B27/22 ,  G02F1/1335

    CPC classification number: G02B6/0031 ,  G02B6/0036 ,  G02B6/0038 ,  G02B6/0068 ,  G02B27/22 ,  G02B27/225 ,  G02B27/30 ,  G02F1/133615 ,  G02F2201/305 ,  G02F2203/12 ,  H04N13/31

    Abstract: Dual-direction collimation and a dual surface collimator provide dual-direction collimated light at a non-zero propagation angle. The dual surface collimator includes an entrance surface and a reflector surface each having a curved shape. The entrance surface is configured to refract incident light and the reflector surface is configured to reflect the refracted light back toward the entrance surface. The entrance surface is further configured to re-reflect the reflected light by total internal reflection toward an output aperture. Curved shapes and relative orientation of the entrance and reflector surfaces, in combination, are configured to convert the incident light into dual-direction collimated light having the non-zero propagation angle. A three-dimensional (3D) display includes the dual surface collimator, a plate light guide and an array of multibeam diffraction gratings to provide a plurality of light beams corresponding to different 3D view of the display.

    DIFFRACTIVE BACKLIGHT DISPLAY AND SYSTEM
    193.
    发明公开
    DIFFRACTIVE BACKLIGHT DISPLAY AND SYSTEM 审中-公开

    公开(公告)号：EP3345040A1

    公开(公告)日：2018-07-11

    申请号：EP16842478.6

    申请日：2016-07-02

    Applicant: LEIA Inc.

    Inventor： FATTAL, David A.

    IPC: G02B27/01 ,  G02B6/12 ,  G02F1/1335

    CPC classification number: G02B27/0172 ,  G02B6/0036 ,  G02B6/0038 ,  G02B6/0058 ,  G02B2027/0138 ,  G02C7/04

    Abstract: A diffractive backlight system includes a light source and a plate light guide. A surface of the plate light guide is configured with a diffraction grating that couples light out of the plate light guide and concentrates the light into a localized region of space. The diffractive backlight system may be used with at least one light valve array to form a display that generates images for viewing in the localized region of space. The display may be incorporated in head-mounted displays in order to generate focused augmented or virtual reality images for wearers.

    LIGHT CONCENTRATING BACKLIGHT AND NEAR-EYE DISPLAY SYSTEM USING SAME
    194.
    发明公开
    LIGHT CONCENTRATING BACKLIGHT AND NEAR-EYE DISPLAY SYSTEM USING SAME 审中-公开

    公开(公告)号：EP3345039A1

    公开(公告)日：2018-07-11

    申请号：EP16842476.0

    申请日：2016-06-30

    Applicant: LEIA Inc.

    Inventor： FATTAL, David A.

    IPC: G02B27/01 ,  F21V8/00

    CPC classification number: G02B27/0172 ,  G02B6/0036 ,  G02B6/0038 ,  G02B6/0058 ,  G02B2027/0138 ,  G02C7/04

    Abstract: A diffractive backlight system includes a light source and a plate light guide. A surface of the plate light guide is configured with a diffraction grating that couples light out of the plate light guide and concentrates the light into a localized region of space. The diffractive backlight system may be used with at least one light valve array to form a display that generates images for viewing in the localized region of space. The display may be incorporated in head-mounted displays in order to generate focused augmented or virtual reality images for wearers.

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