DISPLAY SYSTEM WITH VARIABLE POWER REFLECTOR

    公开(公告)号:US20220221747A1

    公开(公告)日:2022-07-14

    申请号:US17710674

    申请日:2022-03-31

    Abstract: A wearable augmented reality head-mounted display system can be configured to pass light from the world forward a wearer wearing the head-mounted system into an eye of the wearer. The head-mounted display system can include an optical display that is configured to output light to form an image. The system may include one or more waveguides that are disposed to receiving the light from the display. A variable power reflector can be disposed on the forward side of the one or more waveguides. The reflector can be configured to have an optical power that is adjustable upon application of an electrical signal.

    Stacked waveguides having different diffraction gratings for combined field of view

    公开(公告)号:US11269144B2

    公开(公告)日:2022-03-08

    申请号:US15926920

    申请日:2018-03-20

    Abstract: In one aspect, an optical device comprises a plurality of waveguides formed over one another and having formed thereon respective diffraction gratings, wherein the respective diffraction gratings are configured to diffract visible light incident thereon into respective waveguides, such that visible light diffracted into the respective waveguides propagates therewithin. The respective diffraction gratings are configured to diffract the visible light into the respective waveguides within respective field of views (FOVs) with respect to layer normal directions of the respective waveguides. The respective FOVs are such that the plurality of waveguides are configured to diffract the visible light within a combined FOV that is continuous and greater than each of the respective FOVs.

    TIME-MULTIPLEXED DISPLAY OF VIRTUAL CONTENT AT VARIOUS DEPTHS

    公开(公告)号:US20210405374A1

    公开(公告)日:2021-12-30

    申请号:US17370882

    申请日:2021-07-08

    Abstract: Techniques for operating an optical system are disclosed. World light may be linearly polarized along a first axis. When the optical system is operating in accordance with a first state, a polarization of the world light may be rotated by 90 degrees, the world light may be linearly polarized along a second axis perpendicular to the first axis, and zero net optical power may be applied to the world light. When the optical system is operating in accordance with a second state, virtual image light may be projected onto an eyepiece of the optical system, the world light and the virtual image light may be linearly polarized along the second axis, a polarization of the virtual image light may be rotated by 90 degrees, and non-zero net optical power may be applied to the virtual image light.

    SPATIALLY VARIABLE LIQUID CRYSTAL DIFFRACTION GRATINGS

    公开(公告)号:US20210311351A1

    公开(公告)日:2021-10-07

    申请号:US17174163

    申请日:2021-02-11

    Inventor: Chulwoo Oh

    Abstract: The present disclosure relates to display systems and, more particularly, to augmented reality display systems. A diffraction grating includes a plurality of different diffracting zones having a periodically repeating lateral dimension corresponding to a grating period adapted for light diffraction. The diffraction grating additionally includes a plurality of different liquid crystal layers corresponding to the different diffracting zones. The different liquid crystal layers have liquid crystal molecules that are aligned differently, such that the different diffracting zones have different optical properties associated with light diffraction.

    OPTICAL DEVICE WITH ONE-WAY MIRROR
    109.
    发明申请

    公开(公告)号:US20210302636A1

    公开(公告)日:2021-09-30

    申请号:US17211457

    申请日:2021-03-24

    Abstract: In some implementations, an optical device includes a one-way mirror formed by a polarization selective mirror and an absorptive polarizer. The absorptive polarizer has a transmission axis aligned with the transmission axis of the reflective polarizer. The one-way mirror may be provided on the world side of a head-mounted display system. Advantageously, the one-way mirror may reflect light from the world, which provides privacy and may improve the cosmetics of the display. In some implementations, the one-way mirror may include one or more of a depolarizer and a pair of opposing waveplates to improve alignment tolerances and reduce reflections to a viewer. In some implementations, the one-way mirror may form a compact integrated structure with a dimmer for reducing light transmitted to the viewer from the world.

    Variable-focus virtual image devices based on polarization conversion

    公开(公告)号:US11036109B2

    公开(公告)日:2021-06-15

    申请号:US15902927

    申请日:2018-02-22

    Inventor: Chulwoo Oh

    Abstract: Example display devices include a waveguide configured to propagate visible light under total internal reflection in a direction parallel to a major surface of the waveguide. The waveguide has formed thereon an outcoupling element configured to outcouple a portion of the visible light in a direction normal to the major surface of the waveguide. The example display devices additionally include a polarization-selective notch reflector disposed on a first side of the waveguide and configured to reflect visible light having a first polarization while transmitting the portion of the visible light having a second polarization. The example display devices further include a polarization-independent notch reflector disposed on a second side of the waveguide and configured to reflect visible light having the first polarization and the second polarization, where the polarization-independent notch reflector is configured to convert a polarization of visible light reflecting therefrom.

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