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    LIGHTING UNIT WITH ZONAL ILLUMINATION OF A DISPLAY PANEL
    21.
    发明公开
    LIGHTING UNIT WITH ZONAL ILLUMINATION OF A DISPLAY PANEL 审中-公开

    公开(公告)号：US20230418105A1

    公开(公告)日：2023-12-28

    申请号：US18076223

    申请日：2022-12-06

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Zhimin Shi ,  Jian Xu ,  Yijing Fu

    IPC: G02F1/1335 ,  G02F1/13357 ,  F21V8/00

    CPC classification number: G02F1/133607 ,  G02B6/0008 ,  G02B6/0006 ,  G02F1/133621

    Abstract: A lighting unit for a display panel includes a light distribution module, an array of out-couplers, and a beam spot array generation module. The light distribution module includes a plurality of output waveguides for configurably distributing illuminating light between the output waveguides. Each out-coupler is coupled to an output waveguide and configured to out-couple a portion of the illuminating light to propagate towards the display panel. The beam spot array generation module is configured to receive portions of the illuminating light out-coupled by out-couplers of the array of out-couplers and to convert each portion to illuminate a zone of the display panel with an illuminating light field comprising an array of light spots. Each light spot is configured for illuminating an individual pixel or sub-pixel of the zone of the display panel.

    High performance backlight device using photonic integrated circuits
    24.
    发明授权
    High performance backlight device using photonic integrated circuits 有权

    公开(公告)号：US12271078B2

    公开(公告)日：2025-04-08

    申请号：US17985063

    申请日：2022-11-10

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Zhimin Shi ,  James Ronald Bonar ,  Wanli Chi

    IPC: G02F1/13357 ,  G02B27/01

    Abstract: Embodiments of the present disclosure relate to a high performance backlight device with photonic integrated circuits. The backlight device includes a light source assembly, a multi-mode slab waveguide, and an out-coupling assembly. The light source assembly includes one or more light sources that generate light in accordance with emission instructions, and a de-speckling mechanism that conditions the generated light to mitigate speckle. The multi-mode slab waveguide in-couples the conditioned light and expands the in-coupled conditioned light in two dimensions to form a homogenous area of conditioned light within a region of the multi-mode slab waveguide. The out-coupling assembly out-couples the conditioned light from the region in a direction normal to the two dimensions, wherein a light modulation layer forms an image from the out-coupled conditioned light.

    SYSTEMS AND METHODS FOR REDUCING SPECKLE ARTIFACTS IN LASER-ILLUMINATED PANEL DISPLAYS
    25.
    发明申请
    SYSTEMS AND METHODS FOR REDUCING SPECKLE ARTIFACTS IN LASER-ILLUMINATED PANEL DISPLAYS 有权

    公开(公告)号：US20250110277A1

    公开(公告)日：2025-04-03

    申请号：US18895040

    申请日：2024-09-24

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Zhujun Shi ,  Min Chul Shin ,  Risheng Cheng ,  Steven Alexander-Boyd Hickman ,  Guohua Wei ,  Giuseppe Calafiore ,  Zhimin Shi ,  Lei Wang

    IPC: G02B6/28 ,  G02B27/48

    Abstract: The disclosed method may include receiving laser light from a laser light source. The method may also include directing and distributing the laser light onto a laser-based panel display to render pixels having a reduced spatial coherence and a preserved pixel pitch. For example, the pixels may be rendered as a result of an optical path distance between the pixels being greater than a coherent length of the laser light. Alternatively or additionally, the pixels may be rendered as a result of incoherent addition of light from at least one of multiple ports or multiple sources. Alternatively or additionally, the pixels may be rendered as a result of active modulation of the laser light. Alternatively or additionally, the pixels may be rendered as a result of quasi-random placement of outcoupling elements. Various other methods, systems, and computer-readable media are also disclosed.

    HIGH PERFORMANCE BACKLIGHT DEVICE USING PHOTONIC INTEGRATED CIRCUITS
    28.
    发明公开
    HIGH PERFORMANCE BACKLIGHT DEVICE USING PHOTONIC INTEGRATED CIRCUITS 审中-公开

    公开(公告)号：US20230194925A1

    公开(公告)日：2023-06-22

    申请号：US17985063

    申请日：2022-11-10

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Zhimin Shi ,  James Ronald Bonar ,  Wanli Chi

    IPC: G02F1/13357 ,  G02B27/01

    CPC classification number: G02F1/133605 ,  G02F1/133606 ,  G02B27/0172 ,  G02F2201/05 ,  G02F2201/302 ,  G02F2201/38

    Abstract: Embodiments of the present disclosure relate to a high performance backlight device with photonic integrated circuits. The backlight device includes a light source assembly, a multi-mode slab waveguide, and an out-coupling assembly. The light source assembly includes one or more light sources that generate light in accordance with emission instructions, and a de-speckling mechanism that conditions the generated light to mitigate speckle. The multi-mode slab waveguide in-couples the conditioned light and expands the in-coupled conditioned light in two dimensions to form a homogenous area of conditioned light within a region of the multi-mode slab waveguide. The out-coupling assembly out-couples the conditioned light from the region in a direction normal to the two dimensions, wherein a light modulation layer forms an image from the out-coupled conditioned light.

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