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公开(公告)号：US12135834B2
公开(公告)日：2024-11-05
申请号：US18341531
申请日：2023-06-26
Applicant: Valve Corporation
Inventor： Joshua Mark Hudman , Kameron Wade Rausch
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.
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公开(公告)号：US12044846B2
公开(公告)日：2024-07-23
申请号：US17944873
申请日：2022-09-14
Applicant: Valve Corporation
Inventor： Evan Fletcher , Joshua Mark Hudman
CPC classification number: G02B27/0093 , G02B27/0172 , G02B2027/0138 , G02B2027/014
Abstract: Systems and methods for tracking the position of one or more objects, such as components of a head-mounted display (HMD) system. One or more objects may carry a plurality of angle sensitive optical detectors. Each of the optical detectors may include an optical subsystem that is configured to vary at least one of phase or intensity of light imparted on the optical detector. The optical subsystem may include one or more of diffractive optical elements, lens arrays, intensity masks, phase masks, or the like. The optical detectors may include a photodetector that includes a plurality of optically active areas, such as a quadrant cell photodetector, an image sensor with an array of photodiodes, etc. Control circuitry may cause light sources to emit light, and may receive sensor data from the plurality of optical detectors. Control circuitry may process the sensor data to track a position of one or more objects.
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公开(公告)号：US12013541B2
公开(公告)日：2024-06-18
申请号：US18362629
申请日：2023-07-31
Applicant: Valve Corporation
Inventor： Joshua Mark Hudman
CPC classification number: G02B27/0172 , G02B5/18 , G02B5/3016 , G02B5/3083 , G02B6/0023 , G02B6/005 , G02B27/283 , G02B27/4205 , G02B6/2706 , G02B6/276 , G02B6/29311 , G02B2027/0112
Abstract: The present disclosure is 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 system or other device. Display systems of the present disclosure may utilize polarization multiplexing that allow for improved optimization of diffraction optics. In at least some implementations, a display system may selectively polarize light dependent on wavelength (e.g., color) or field of view. An optical combiner may include polarization sensitive diffractive optical elements that are each optimized for a subset of colors or portions of an overall field of view, thereby providing improved correction optics for a display system.
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公开(公告)号：US11815684B2
公开(公告)日：2023-11-14
申请号：US17166837
申请日：2021-02-03
Applicant: Valve Corporation
Inventor： Joshua Mark Hudman
CPC classification number: G02B27/0172 , G02B27/0093 , G02B27/28 , G06V40/18 , G02B2027/0187
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：US20230314692A1
公开(公告)日：2023-10-05
申请号：US17711856
申请日：2022-04-01
Applicant: Valve Corporation
Inventor： Joshua Mark Hudman , Douglas Vanderwel
CPC classification number: G02B6/0061 , G02B6/0036 , G02B6/0043 , G02B6/0068 , G02B6/003 , G06F1/163
Abstract: A head-mounted display device includes a display panel (such as a liquid crystal display), an optics system for focusing a portion of the display onto an eye of a user, and a backlight assembly including a light guide, a plurality of extraction features positioned on a surface of the light guide, and at least one laser diode for directing light into the light guide. The light guide is sized and dimensioned to illuminate only a portion of the display that is focused by the optics system; with the plurality of light extraction features configured to diffuse light toward the display panel for back illuminating the display panel.
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Patent Agency Ranking
公开(公告)号：US20230093721A1
公开(公告)日：2023-03-23
申请号：US17483024
申请日：2021-09-23
Applicant: Valve Corporation
Inventor： Joshua Mark Hudman
IPC: H04N13/332 , G02F1/1335 , G02F1/13363
Abstract: A optical system of a head mounted display (HMD) system that includes a lens assembly comprising a first lens element and a second lens element that are directly or indirectly coupled together, for example, via a suitable optically clear adhesive. The lens assembly may include a quarter-wave plate disposed between the first and second lens elements. The first lens element may include a surface with an anti-reflective coating thereon, and the second lens element may include a surface with a partially reflective coating thereon. The optical system may include a reflective polarizer that, together with the lens assembly, focuses light from a display system to an eye of a user of the head mounted display system.
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公开(公告)号：US11467660B2
公开(公告)日：2022-10-11
申请号：US17167926
申请日：2021-02-04
Applicant: Valve Corporation
Inventor： Joshua Mark Hudman , Kameron Wade Rausch
IPC: G02F1/139 , G02F1/01 , G06F3/03 , G06F3/0346 , G06F3/01
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.
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公开(公告)号：US11467444B2
公开(公告)日：2022-10-11
申请号：US17169000
申请日：2021-02-05
Applicant: Valve Corporation
Inventor： Joshua Mark Hudman
IPC: G02F1/1335 , G02F1/13363
Abstract: Systems and methods for providing a polarization recycling structure for use in applications, such as display systems that include a liquid crystal display assembly. The polarization recycling structure may include a first spatially varying polarizer spaced apart from a second spatially varying polarizer. The first spatially varying polarizer may include a lens array that receives light from a light source and focuses light of a first polarization state and passes light of a second polarization state. The second spatially varying polarizer receive light from the first spatially varying polarizer, passes the focused light of the first polarization state, and transforms the light of the second polarization state into the first polarization state, thereby providing only light of the first polarization state at the output of the polarization recycling structure. The polarization recycling structures improve the efficiency of lighting subsystems, thereby reducing power consumption, cost, space requirements, and providing other advantages.
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公开(公告)号：US20220269133A1
公开(公告)日：2022-08-25
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.
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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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