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    REDUCED BANDWIDTH STEREO DISTORTION CORRECTION FOR FISHEYE LENSES OF HEAD-MOUNTED DISPLAYS
    11.
    发明申请
    REDUCED BANDWIDTH STEREO DISTORTION CORRECTION FOR FISHEYE LENSES OF HEAD-MOUNTED DISPLAYS 审中-公开

    公开(公告)号：US20200107013A1

    公开(公告)日：2020-04-02

    申请号：US16144805

    申请日：2018-09-27

    Applicant: Valve Corporation

    Inventor： Joshua Mark Hudman ,  Kameron Wade Rausch

    IPC: H04N13/239 ,  H04N13/344

    Abstract: Systems and methods of providing stereo depth cameras for head-mounted display systems that require less memory and/or processing power. The stereo depth camera may include a left camera and a right camera spaced apart from each other by a distance. Each of the left and right cameras may be skewed outward by a non-zero angle from a forward direction of the head-mounted display system to provide a relatively wide field of view for the stereo depth camera. Each of the left and right cameras may include a camera sensor array and a camera lens positioned forward of the camera sensor array. Each of the camera lenses may include an optical axis that is laterally offset from the center of the associated camera sensor array toward a center of the support structure to center the left camera lens substantially on a scene center or principal point.

    Display backlight with light expander structures
    12.
    发明授权
    Display backlight with light expander structures 有权

    公开(公告)号：US12197074B2

    公开(公告)日：2025-01-14

    申请号：US17668155

    申请日：2022-02-09

    Applicant: Valve Corporation

    Inventor： Joshua Mark Hudman ,  Kameron Wade Rausch ,  Douglas Vanderwel

    IPC: G02F1/1335 ,  G02F1/13363

    Abstract: Methods and systems relating generally to information displays, and more particularly to systems and methods for backlight assemblies for information displays that include light expanding structures. A backlight assembly may include light expander structures that include a plurality of layer sets, wherein each layer set includes a reflective polarizer layer and a wave retarder layer. The layer sets may together be operative transform point light source, such as a laser light beam, into a surface light source for use as a backlight for various types of information displays.

    Correction polarization compensation optic for display systems
    13.
    发明授权
    Correction polarization compensation optic for display systems 有权

    公开(公告)号：US12047551B2

    公开(公告)日：2024-07-23

    申请号：US18316805

    申请日：2023-05-12

    Applicant: Valve Corporation

    Inventor： Joshua Mark Hudman

    IPC: G02B27/01 ,  G02B27/28 ,  H04N13/337 ,  H04N13/339

    CPC classification number: H04N13/337 ,  G02B27/0172 ,  G02B27/286 ,  H04N13/339 ,  G02B2027/0178

    Abstract: The present disclosure related generally to techniques for improving the performance and efficiency of display systems, such as laser scan beam display systems or other types of display systems (e.g., micro-displays). Display systems of the present disclosure may include a polarization compensation optic, such as a spatially varying polarizer, that provides phase retardation that varies as a function of position, which provides polarization compensation to provide light that is well suited for a polarization sensitive optic of the display system, such as a waveguide-based optical system, a pancake optical system, a birdbath optical system, a coating-based optical system, etc. The display systems of the present disclosure may be components of head-mounted display systems, or other types of display systems.

    Variable optical correction using spatially varying polarizers
    15.
    发明授权
    Variable optical correction using spatially varying polarizers 有权

    公开(公告)号：US11747656B2

    公开(公告)日：2023-09-05

    申请号：US18064795

    申请日：2022-12-12

    Applicant: Valve Corporation

    Inventor： Joshua Mark Hudman

    IPC: G02F1/01 ,  G02F1/139 ,  G02B27/01 ,  G02F1/133 ,  G02C7/12

    CPC classification number: G02F1/0136 ,  G02B27/0172 ,  G02B27/0179 ,  G02C7/12 ,  G02F1/1396 ,  G02F1/13306 ,  G02B2027/0187

    Abstract: An optical system is provided that includes a correction portion including one or more spatially varying polarizers. A first spatially varying polarizer of the one or more spatially varying polarizers has a first control input configured to receive a first control signal indicating whether the first spatially varying polarizer is to be active or inactive. When active, the first spatially varying polarizer is operative to provide a first optical correction on light passing through the correction portion. The optical system includes a controller configured to determine whether to implement the first optical correction on the light passing through the correction portion and in response to determining to implement the first optical correction on the light passing through the correction portion, output the first control signal indicating the first spatially varying polarizer is to be active. Additional spatially varying polarizers may be controlled to provide additional or alternative optical corrections.

    Position tracking system for head-mounted display systems
    18.
    发明授权
    Position tracking system for head-mounted display systems 有权

    公开(公告)号：US11703946B2

    公开(公告)日：2023-07-18

    申请号：US17949901

    申请日：2022-09-21

    Applicant: Valve Corporation

    Inventor： Joshua Mark Hudman ,  Kameron Wade Rausch

    IPC: G06F3/01 ,  G06F3/03 ,  G02F1/139 ,  G02F1/01 ,  G06F3/0346

    CPC classification number: G06F3/012 ,  G02F1/0136 ,  G02F1/1396 ,  G06F3/0304 ,  G06F3/0346 ,  G02F2203/07 ,  G06F2203/012

    Abstract: Systems and methods for tracking the position of a head-mounted display (HMD) system component. The HMD component may carry a plurality of angle sensitive detectors that are able to detect the angle of light emitted from a light source. The HMD component may include one or more scatter detectors that detect whether light has been scattered or reflected, so such light can be ignored. Control circuitry causes light sources to emit light according a specified pattern, and receives sensor data from the plurality of angle sensitive detectors. The processor may process the sensor data and scatter detector data, for example using machine learning or other techniques, to track a position of the HMD component. An angle sensitive detector may include a spatially-varying polarizer having a position-varying polarizing pattern and one or more polarizer layers that together are operative to detect the angle of impinging light.

    POLARIZATION COMPENSATION FOR WIRE GRID POLARIZER OF HEAD-MOUNTED DISPLAY SYSTEM
    20.
    发明申请
    POLARIZATION COMPENSATION FOR WIRE GRID POLARIZER OF HEAD-MOUNTED DISPLAY SYSTEM 有权

    公开(公告)号：US20230050117A1

    公开(公告)日：2023-02-16

    申请号：US17977873

    申请日：2022-10-31

    Applicant: Valve Corporation

    Inventor： Joshua Mark Hudman

    IPC: G02B5/30 ,  G02B27/01

    Abstract: The present disclosure relates generally to techniques for improving the performance and efficiency of optical systems, such as optical systems for using head-mounted display system. The optical systems of the present disclosure may include polarized catadioptric optics, or “pancake optics,” which utilize a wire grid polarizer as a reflective polarizer. Wire grid polarizers may not perform uniformly over wavelength or over varying angles of incidence. To improve performance, a spatially varying polarizer is provided in the optical system that operates to provide polarization compensation for the wire grid polarizer so that the wire grid polarizer performs more uniformly over wavelength and/or over incidence angles (e.g., on-axis and off-axis). The spatially varying polarizer may be formed of a liquid crystal material, such as a multi-twist retarder.

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