知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

2748 条记录 (耗时 0.032 秒)

    APPARATUSES AND SYSTEMS FOR OPTICAL ELEMENT MEASUREMENTS
    2.
    发明公开
    APPARATUSES AND SYSTEMS FOR OPTICAL ELEMENT MEASUREMENTS 审中-公开

    公开(公告)号：US20230375410A1

    公开(公告)日：2023-11-23

    申请号：US17749410

    申请日：2022-05-20

    申请人： Facebook Technologies, LLC

    发明人： Aiqing Chen ,  Chandra Sekhar Kakani ,  Evan Michael Pollard ,  Ashvath Sharma

    IPC分类号： G01J4/00

    CPC分类号： G01J4/00 ,  G01J2004/002

    摘要： The disclosed apparatus may include a holding affordance that is configured to hold an optical element, a beam emitter, and a beam sensor, where the holding affordance is positioned, along a first dimension, between the beam emitter and the beam sensor; a first linear stage that supports the beam emitter and that, when actuated, moves the beam emitter along a second dimension; a first rotational stage that supports the beam emitter and that, when actuated, rotates the beam emitter in a staging plane defined by the first dimension and the second dimension; a second linear stage that supports the beam sensor and that, when actuated, moves the beam sensor along the second dimension; and a second rotational stage that supports the beam sensor and that, when actuated, rotates the beam sensor in the staging plane. Various other systems and methods are also disclosed.

    PHASE-COMPENSATED PUPIL-REPLICATING LIGHTGUIDE
    3.
    发明公开
    PHASE-COMPENSATED PUPIL-REPLICATING LIGHTGUIDE 审中-公开

    公开(公告)号：US20230341684A1

    公开(公告)日：2023-10-26

    申请号：US17727658

    申请日：2022-04-22

    申请人： Facebook Technologies, LLC

    发明人： Jilin Yang ,  Hee Yoon Lee

    IPC分类号： G02B27/01 ,  G02B6/293 ,  G02B6/35

    CPC分类号： G02B27/0172 ,  G02B6/29316 ,  G02B6/3532

    摘要： A pupil-replicating lightguide includes an in-coupling grating structure, an out-coupling grating structure, and a phase compensation layer. The out-coupling grating structure has a spatially varying parameter such as grating duty cycle or grating thickness for evening out out-coupled distribution of light. The spatially varying out-coupling grating parameter disturbs the phase of the propagating image light. The phase compensation layer has a spatially varying optical thickness that compensates that disturbed phase to planarize an optical phase profile of out-coupled light, thereby improving a modulation transfer function of the pupil-replicating lightguide.

    ADAPTIVE FEEDBACK CANCELATION AND ENTRAINMENT MITIGATION
    7.
    发明申请
    ADAPTIVE FEEDBACK CANCELATION AND ENTRAINMENT MITIGATION 有权

    公开(公告)号：US20230090315A1

    公开(公告)日：2023-03-23

    申请号：US17481170

    申请日：2021-09-21

    申请人： Facebook Technologies, LLC

    发明人： Sarmad Aziz Malik ,  Nils Thomas Fritiof Lunner

    IPC分类号： H04R3/02 ,  H04R1/02

    摘要： An audio system for artificial reality systems is configured to reduce feedback and mitigate entrainment in audio content presented to the user. The audio system utilizes adaptive feedback cancellation processes to reduce feedback. The audio system processes reference signals in a hybrid of the time domain and the frequency domain to achieve rapid convergence with decreased entrainment. The audio system may pre-whiten reference signals and speaker signals and separate the pre-whitened signals into frequency bands using a filter bank. The audio system uses a state space algorithm to generate adaptive filters in each frequency band. The adaptive filters may be applied to the speaker signal to generate a feedback cancelation signal which may be subtracted from the reference signal to decrease feedback.

    SYSTEMS AND METHODS FOR ULTRA-WIDEBAND-BASED ANGLE OF APPROACH DETERMINATION
    8.
    发明申请
    SYSTEMS AND METHODS FOR ULTRA-WIDEBAND-BASED ANGLE OF APPROACH DETERMINATION 有权

    公开(公告)号：US20230064143A1

    公开(公告)日：2023-03-02

    申请号：US17461605

    申请日：2021-08-30

    申请人： Facebook Technologies, LLC

    发明人： Carlos Horacio ALDANA ,  Abhishek Kumar AGRAWAL

    IPC分类号： G01S1/08 ,  G01S13/02

    摘要： Disclosed herein are related to a system and a method for determining an Angle of Approach (AoA) of a device. A first device may receive a report from a second device having a plurality of ultra-wideband (UWB) devices. The report may include a plurality of values comprising an elevation component and an azimuth component of the AoA from the first device. At least some of the plurality of values may be obtained according to measurements between the plurality of UWB devices of the second devices and the at least one UWB device of the first device. The first device may determine an AoA from the second device, using the plurality of values from the report received from the second device.

    Sliced encoding and decoding for remote rendering
    9.
    发明授权
    Sliced encoding and decoding for remote rendering 有权

    公开(公告)号：US11595646B2

    公开(公告)日：2023-02-28

    申请号：US16912290

    申请日：2020-06-25

    申请人： Facebook Technologies, LLC

    发明人： Matthew Robert Fulghum ,  Reza Nourai ,  Behnam Bastani

    IPC分类号： H04N19/119 ,  H04N19/174 ,  G02B27/01 ,  G06F3/01 ,  G06T19/00 ,  H04L65/70 ,  H04L65/75

    摘要： Disclosed herein are related to a device and a method of remotely rendering an image. In one approach, a device divides an image of an artificial reality space into a plurality of slices. In one approach, the device encodes a first slice of the plurality of slices. In one approach, the device encodes a portion of a second slice of the plurality of slices, while the device encodes a portion of the first slice. In one approach, the device transmits the encoded first slice of the plurality of slices to a head wearable display. In one approach, the device transmits the encoded second slice of the plurality of slices to the head wearable display, while the device transmits a portion of the encoded first slice to the head wearable display.