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公开(公告)号：US20220011998A1
公开(公告)日：2022-01-13
申请号：US17382046
申请日：2021-07-21
Applicant: Valve Corporation
Inventor： Joshua Mark Hudman , Jeremy Adam Selan
Abstract: The disclosure relates generally to techniques for determining pupil location of a display device's user via imaging sensors on the display device, and using that information to verify and/or correct positioning of the display device or its internal components. The display device may be a head-mounted display (“HMD”) device with display panels separated from a wearer's eyes via intervening lenses, with the sensors including optical flow sensor integrated circuits mounted on or near at least one of the display panels to capture images of the wearer's eye locations through the lenses, and with the correction to the positioning including modifications to the alignment or other positioning of the HMD device on the wearer user's head and/or its internal components within the HMD device (e.g., based on automated control of motors on the HMD device) to reflect a target alignment of the wearer's eyes relative to displayed information.
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Patent Agency Ranking
公开(公告)号：US20210250570A1
公开(公告)日：2021-08-12
申请号：US17168991
申请日：2021-02-05
Applicant: Valve Corporation
Inventor： Joshua Mark Hudman
IPC: H04N13/337 , G02B27/01 , H04N13/339 , G02B27/28
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.
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公开(公告)号：US20210247614A1
公开(公告)日：2021-08-12
申请号：US17166887
申请日：2021-02-03
Applicant: Valve Corporation
Inventor： Joshua Mark Hudman
Abstract: An optical system is provided. The optical system includes a gaze tracker operative to track a gaze of a user and output data representative of the gaze and a correction portion including multiple spatially varying polarizers. A first polarizer of the spatially varying polarizers has a first control input configured to receive a first control signal indicating whether the first polarizer is to be active or inactive. The first polarizer, when active, provides a first optical correction on light passing through at a location corresponding to a first region of a virtual image. The optical system includes a controller configured to receive the data representative of the gaze, determine, based on the gaze, whether to implement the first optical correction on the light and in response to determining to implement the first optical correction on the light, output the first control signal indicating the first polarizer is to be active.
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公开(公告)号：US20210247613A1
公开(公告)日：2021-08-12
申请号：US17166837
申请日：2021-02-03
Applicant: Valve Corporation
Inventor： Joshua Mark Hudman
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) of an HMD or other device. 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 spatially varying polarizer may be varied spatially in real-time based on a user's gaze location to provide an optimized field of view in a region where the user is known or inferred to be gazing, thereby providing improved optical performance.
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公开(公告)号：US20210247611A1
公开(公告)日：2021-08-12
申请号：US17165570
申请日：2021-02-02
Applicant: Valve Corporation
Inventor： Joshua Mark Hudman
IPC: G02B27/01 , G02F1/1335 , G02F1/13363 , G02F1/1337
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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公开(公告)号：US10890694B2
公开(公告)日：2021-01-12
申请号：US15704813
申请日：2017-09-14
Applicant: Valve Corporation
Inventor： Joshua Mark Hudman
Abstract: Systems and methods for providing optical systems which utilize double Fresnel lenses on curved surfaces for use with display systems, such as silicon-based micro display systems (e.g., OLED micro displays) used with head mounted display (HMD) systems. The optical systems disclosed herein may implement multiplexing or blending to provide a smooth profile transition and reduce aberrations between zones or fields (e.g., small FOV angles, large FOV angles) of a Fresnel surface which is defined by multiple Fresnel patterns or functions. An optical system for a micro display is provided which utilizes double Fresnel lenses on curved surfaces to shorten the focal length while maintaining a good shape factor for moldability and aberration control.
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