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41.发明授权公开(公告)号：US11119327B2
公开(公告)日：2021-09-14
申请号：US16904013
申请日：2020-06-17
Applicant: Magic Leap, Inc.
Inventor： Chulwoo Oh
Abstract: An optical device includes a stack of multiple grating structures, each of which includes a plurality of sublayers of liquid crystal material. Each sublayer of liquid crystal material includes laterally extending repeating units, each formed of a plurality of liquid crystal molecules. The repeating units of the liquid crystal layers are lateral offset from one another, and defined a tilt angle. The grating structures forming the stack of grating structure have tilt angles of different magnitudes. The grating structures may be configured to redirect light of visible or infrared wavelengths. Advantageously, the different tilt angles of the stack of grating structures allows for highly efficient diffraction of light incident on the grating structures at a wide range of incident angles.
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公开(公告)号：US20210240018A1
公开(公告)日：2021-08-05
申请号：US17175566
申请日：2021-02-12
Applicant: Magic Leap, Inc.
Inventor： Brian T. Schowengerdt , John Graham Macnamara , Chulwoo Oh
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.
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43.发明授权公开(公告)号：US10908423B2
公开(公告)日：2021-02-02
申请号：US15815250
申请日：2017-11-16
Applicant: MAGIC LEAP, INC.
Inventor： Chulwoo Oh
Abstract: An optical device includes a stack of multiple grating structures, each of which includes a plurality of sublayers of liquid crystal material. Each sublayer of liquid crystal material includes laterally extending repeating units, each formed of a plurality of liquid crystal molecules. The repeating units of the liquid crystal layers are lateral offset from one another, and defined a tilt angle. The grating structures forming the stack of grating structure have tilt angles of different magnitudes. The grating structures may be configured to redirect light of visible or infrared wavelengths. Advantageously, the different tilt angles of the stack of grating structures allows for highly efficient diffraction of light incident on the grating structures at a wide range of incident angles.
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公开(公告)号：US10782582B2
公开(公告)日：2020-09-22
申请号：US15902927
申请日：2018-02-22
Applicant: Magic Leap, Inc.
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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公开(公告)号：US20200174304A1
公开(公告)日：2020-06-04
申请号：US16673652
申请日：2019-11-04
Applicant: Magic Leap, Inc.
Inventor： Chulwoo Oh
Abstract: Examples of diffractive devices comprise a cholesteric liquid crystal (CLC) layer comprising a plurality of chiral structures, wherein each chiral structure comprises a plurality of liquid crystal molecules that extend in a layer depth direction by at least a helical pitch and are successively rotated in a first rotation direction. Arrangements of the liquid crystal molecules of the chiral structures vary periodically in a lateral direction perpendicular to the layer depth direction to provide a diffraction grating. The diffractive devices can be configured to reflect light having a particular wavelength range and sense of circular polarization. The diffractive devices can be used in waveguides and imaging systems in augmented or virtual reality systems.
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Patent Agency Ranking
46.发明申请公开(公告)号：US20190129178A1
公开(公告)日：2019-05-02
申请号：US16171111
申请日：2018-10-25
Applicant: Magic Leap, Inc.
Inventor： Roy Patterson , Chulwoo Oh , Ravi Kumar Komanduri , Charles Scott Carden , Michael Nevin Miller , Vikramjit Singh , Shuqiang Yang
Abstract: A display device includes a waveguide assembly comprising a waveguide configured to outcouple light out of a major surface of the waveguide to form an image in the eyes of a user. An adaptive lens assembly has a major surface facing the output surface and a waveplate lens and a switchable waveplate assembly. The switchable waveplate assembly includes quarter-wave plates on opposing sides of a switchable liquid crystal layer, and electrodes on the quarter-wave plates in the volume between the quarter-wave plates. The electrodes can selectively establish an electric field and may serve as an alignment structure for molecules of the liquid crystal layer. Portions of the adaptive lens assembly may be manufactured by roll-to-roll processing in which a substrate roll is unwound, and alignment layers and liquid crystal layers are formed on the substrate as it moves towards a second roller, to be wound on that second roller.
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公开(公告)号：US20190018245A1
公开(公告)日：2019-01-17
申请号：US15927997
申请日：2018-03-21
Applicant: Magic Leap, Inc.
Inventor： Hui-Chuan Cheng , Hyunsun Chung , Jahja I. Trisnadi , Clinton Carlisle , Chulwoo Oh , Kevin Richard Curtis
Abstract: An optical device comprising may include a light turning element. The optical device can include a first surface that is parallel to a horizontal axis and a second surface opposite to the first surface. The optical device may include a light module that includes a plurality of light emitters. The light module can be configured to combine light for the plurality of emitters. The optical device can further include a light input surface that is between the first and the second surfaces and is disposed with respect to the light module to receive light emitted from the plurality of emitters. The optical device may include an end reflector that is disposed on a side opposite the light input surface. The light coupled into the light turning element may be reflected by the end reflector and/or reflected from the second surface towards the first surface.
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公开(公告)号：US20180164627A1
公开(公告)日：2018-06-14
申请号：US15835108
申请日：2017-12-07
Applicant: Magic Leap, Inc.
Inventor： Chulwoo Oh
IPC: G02F1/137 , G02F1/01 , G02F1/1335 , G02F1/29
Abstract: Examples of diffractive devices comprise a cholesteric liquid crystal (CLC) layer comprising a plurality of chiral structures, wherein each chiral structure comprises a plurality of liquid crystal molecules that extend in a layer depth direction by at least a helical pitch and are successively rotated in a first rotation direction. Arrangements of the liquid crystal molecules of the chiral structures vary periodically in a lateral direction perpendicular to the layer depth direction to provide a diffraction grating. The diffractive devices can be configured to reflect light having a particular wavelength range and sense of circular polarization. The diffractive devices can be used in waveguides and imaging systems in augmented or virtual reality systems.
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49.发明申请公开(公告)号：US20180143438A1
公开(公告)日：2018-05-24
申请号：US15815250
申请日：2017-11-16
Applicant: MAGIC LEAP, INC.
Inventor： Chulwoo Oh
Abstract: An optical device includes a stack of multiple grating structures, each of which includes a plurality of sublayers of liquid crystal material. Each sublayer of liquid crystal material includes laterally extending repeating units, each formed of a plurality of liquid crystal molecules. The repeating units of the liquid crystal layers are lateral offset from one another, and defined a tilt angle. The grating structures forming the stack of grating structure have tilt angles of different magnitudes. The grating structures may be configured to redirect light of visible or infrared wavelengths. Advantageously, the different tilt angles of the stack of grating structures allows for highly efficient diffraction of light incident on the grating structures at a wide range of incident angles.
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公开(公告)号：US12235480B2
公开(公告)日：2025-02-25
申请号：US18440180
申请日：2024-02-13
Applicant: Magic Leap, Inc.
Inventor： Chulwoo Oh , Ravi Kumar Komanduri , David Kleinman , Vaibhav Mathur , David Manly
IPC: G02B5/30 , F21V8/00 , G02B5/08 , G02B27/01 , G02F1/1335
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.
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