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    LOCAL DIMMING FOR ARTIFICIAL REALITY SYSTEMS
    1.
    发明公开
    LOCAL DIMMING FOR ARTIFICIAL REALITY SYSTEMS 审中-公开

    公开(公告)号：US20230317023A1

    公开(公告)日：2023-10-05

    申请号：US17713965

    申请日：2022-04-05

    Applicant: META PLATFORMS TECHNOLOGIES, LLC

    Inventor： Weihua Gao ,  Jianru Shi ,  Tianxin Ning ,  Haomiao Jiang

    IPC: G09G3/34

    CPC classification number: G09G3/342 ,  G09G2340/0407 ,  G09G2320/0626 ,  G09G2320/0247

    Abstract: In particular embodiments, a computing system may receive an image to be shown on a display having a plurality of backlight zones. The computing system may compute a backlight matrix for adjusting brightness levels of the backlight zones of the display by computing, for each of the backlight zones, a zone statistic to represent grayscale levels of a portion of the image within the backlight zone, mapping the zone statistic of each of the backlight zones to a brightness value using a particular mapping technique configured to adjust any of the backlight zones having a zone statistic that is below a predetermined threshold, and generating the backlight matrix by filtering the brightness values. The computing system may instruct the display to output the image and adjust the backlight zones based on the backlight matrix.

    Systems and methods for performing global dimming in artificial reality systems
    4.
    发明授权
    Systems and methods for performing global dimming in artificial reality systems 有权

    公开(公告)号：US12288531B2

    公开(公告)日：2025-04-29

    申请号：US18301629

    申请日：2023-04-17

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Haomiao Jiang ,  Linghui Rao ,  Tianxin Ning ,  Weihua Gao ,  Yongmin Park

    IPC: G09G3/34 ,  G09G3/36

    Abstract: In particular embodiments, a computing system may receive receiving a first image frame of a sequence of image frames to be shown on a display having a plurality of backlight zones. The computing system may compute backlight unit statistics of the first image frame. The backlight unit statistics may represent grayscale levels for the plurality of backlight zones. The computing system may compute a global dimming gain for adjusting color values and backlight unit intensity of a second image frame of the sequence of image frames based on the backlight unit statistics of the first image frame. The computing system may adjust, using the global dimming gain, the color values and the backlight unit intensity of the second image frame.

    Foveated rendering using eye motion
    5.
    发明授权
    Foveated rendering using eye motion 有权

    公开(公告)号：US12141935B2

    公开(公告)日：2024-11-12

    申请号：US18133568

    申请日：2023-04-12

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Behnam Bastani ,  Tianxin Ning ,  Haomiao Jiang

    IPC: G06T19/00 ,  G06F3/01 ,  G06T1/60 ,  G06T3/04 ,  G06T11/00

    Abstract: A method for providing imagery to a user on a display includes receiving eye tracking data. The method also includes determining a current gaze location and a relative distance between the current gaze location and an edge of the display using the eye tracking data. The method also includes defining a first tile centered at the current gaze location and multiple tiles that surround the first tile using the current gaze location and the relative distance between the current gaze location and the edge of the display. The method includes providing a foveated rendered image using the first tile and the multiple tiles.

    Techniques for Reducing Visual Artifacts in Foveated Rendering
    6.
    发明公开
    Techniques for Reducing Visual Artifacts in Foveated Rendering 审中-公开

    公开(公告)号：US20230245260A1

    公开(公告)日：2023-08-03

    申请号：US18162297

    申请日：2023-01-31

    Applicant: Meta Platforms Technologies, LLC

    Inventor： Weihua Gao ,  Todd Douglas Keeler ,  Steven Paul Lansel ,  Jian Zhang ,  Tianxin Ning

    IPC: G06T1/20 ,  G06T5/00 ,  G06T7/11 ,  G06F3/01

    CPC classification number: G06T1/20 ,  G06T5/002 ,  G06T7/11 ,  G06F3/013

    Abstract: In one embodiment, a method includes by a computing system, rendering an image using a tile-based graphics processing unit. Determining a gaze location of a user wearing a head-mounted device and using the gaze location to select, from the multiple tiles, central tiles in which the user's gaze location is located, periphery tiles outside of the central tiles, and border tiles located between the central tiles and the periphery tiles. Instructing the GPU to render (a) the central tiles in a first pixel-density, (b) the periphery tiles in a second pixel-density, and (c) the border tiles in the first pixel-density and in the second pixel-density and then blending the border tiles rendered in the first pixel-density and the border tiles rendered in the second pixel-density to create blended border tiles. Then, outputting the central tiles, the periphery tiles, and the blended border tiles using a display of the head-mounted device.

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