公开(公告)号：US12007652B2

公开(公告)日：2024-06-11

申请号：US17252169

申请日：2019-06-13

Applicant: Magic Leap, Inc.

Inventor： Chulwoo Oh ,  Ravi Kumar Komanduri

IPC: G02F1/1337 ,  G02F1/01 ,  G02B27/01 ,  G02F1/1335 ,  G02F1/13363 ,  G02F1/1347

CPC classification number: G02F1/133757 ,  G02F1/0136 ,  G02B27/0172 ,  G02F1/133528 ,  G02F1/133633 ,  G02F1/133638 ,  G02F1/133761 ,  G02F1/133776 ,  G02F1/13378 ,  G02F1/13471

Abstract: A switchable optical assembly comprises a switchable waveplate configured to be electrically activated and deactivated to selectively alter the polarization state of light incident thereon. The switchable waveplate comprises first and second surfaces and a first liquid crystal layer disposed between the first and second surfaces. The first liquid crystal layer comprises a plurality of liquid crystal molecules that are rotated about respective axes parallel to a central axis, where the rotation varies with an azimuthal angle about the central axis. The switchable waveplate additionally comprises a plurality of electrodes to apply an electrical signal across said first liquid crystal layer.

公开(公告)号：US11815854B2

公开(公告)日：2023-11-14

申请号：US17100387

申请日：2020-11-20

Applicant: Magic Leap, Inc.

Inventor： Ravi Kumar Komanduri ,  Chulwoo Oh

IPC: G03H1/02

CPC classification number: G03H1/0276 ,  G03H1/0244 ,  G03H2222/31 ,  G03H2222/34 ,  G03H2222/36 ,  G03H2250/38

Abstract: An optical master is created by using a nanoimprint alignment layer to pattern a liquid crystal layer. The nanoimprint alignment layer and the liquid crystal layer constitute the optical master. The optical master is positioned above a photo-alignment layer. The optical master is illuminated and light propagating through the nanoimprinted alignment layer and the liquid crystal layer is diffracted and subsequently strikes the photo-alignment layer. The incident diffracted light causes the pattern in the liquid crystal layer to be transferred to the photo-alignment layer. A second liquid crystal layer is deposited onto the patterned photo-alignment layer, which subsequently is used to align the molecules of the second liquid crystal layer. The second liquid crystal layer in the patterned photo-alignment layer may be utilized as a replica optical master, or as a diffractive optical element for directing light in optical devices such as augmented reality display devices.

公开(公告)号：US11803003B2

公开(公告)日：2023-10-31

申请号：US17590482

申请日：2022-02-01

Applicant: Magic Leap, Inc.

Inventor： Chulwoo Oh ,  Vikraman Parthiban

IPC: G02B5/18 ,  F21V8/00 ,  G02B6/10 ,  G02F1/29 ,  G02B27/01 ,  H04N9/31 ,  G02B27/00 ,  G02B27/42

CPC classification number: G02B6/0016 ,  G02B5/1833 ,  G02B5/1842 ,  G02B6/0076 ,  G02B6/10 ,  G02B27/0093 ,  G02B27/0172 ,  G02B27/0189 ,  G02B27/4261 ,  G02F1/292 ,  H04N9/3129 ,  G02B2027/0123 ,  G02B2027/0127 ,  G02B2027/0134 ,  G02B2027/0185 ,  G02B2027/0187 ,  G02F2201/305 ,  G02F2203/22

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.

公开(公告)号：US20230341694A1

公开(公告)日：2023-10-26

申请号：US18342451

申请日：2023-06-27

Applicant: Magic Leap, Inc.

Inventor： Chunyu Gao ,  Chulwoo Oh ,  Michael Anthony Klug ,  Evyatar Bluzer

IPC: G02B27/01 ,  G06T19/00 ,  H04N13/344 ,  G02B27/00 ,  H04N13/383 ,  H04N13/332 ,  F21V8/00

CPC classification number: G02B27/0172 ,  G06T19/006 ,  H04N13/344 ,  G02B27/0093 ,  H04N13/383 ,  G02B27/0179 ,  H04N13/332 ,  H04N2213/001 ,  G02B2027/0127 ,  G02B2027/0134 ,  G02B2027/0123 ,  G02B6/0076 ,  G02B2027/0178 ,  G02B2027/0187 ,  G02B2027/0185 ,  G02B2027/0138

Abstract: Examples of eye-imaging apparatus using diffractive optical elements are provided. For example, an optical device comprises a substrate having a proximal surface and a distal surface, a first coupling optical element disposed on one of the proximal and distal surfaces of the substrate, and a second coupling optical element disposed on one of the proximal and distal surfaces of the substrate and offset from the first coupling optical element. The first coupling optical element can be configured to deflect light at an angle to totally internally reflect (TIR) the light between the proximal and distal surfaces and toward the second coupling optical element, and the second coupling optical element can be configured to deflect at an angle out of the substrate. The eye-imaging apparatus can be used in a head-mounted display such as an augmented or virtual reality display.

公开(公告)号：US11774823B2

公开(公告)日：2023-10-03

申请号：US17710674

申请日：2022-03-31

Applicant: Magic Leap, Inc.

Inventor： Brian T. Schowengerdt ,  John Graham Macnamara ,  Chulwoo Oh

IPC: G02F1/137 ,  F21V8/00 ,  G02F1/133 ,  G02B27/01 ,  G02B26/08 ,  G02F1/29

CPC classification number: G02F1/137 ,  G02B6/0026 ,  G02B6/0055 ,  G02B6/0056 ,  G02B6/0076 ,  G02B6/0088 ,  G02B26/0825 ,  G02B27/0172 ,  G02F1/13306 ,  G02F1/13718 ,  G02F1/29 ,  G02F2203/07

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.

公开(公告)号：US11714326B2

公开(公告)日：2023-08-01

申请号：US17646094

申请日：2021-12-27

Applicant: Magic Leap, Inc.

Inventor： Chulwoo Oh

IPC: G02F1/137 ,  F21V8/00 ,  G02F1/133 ,  G02B27/01 ,  G02B26/08 ,  G02F1/29

CPC classification number: G02F1/137 ,  G02B6/0026 ,  G02B6/0055 ,  G02B6/0056 ,  G02B6/0076 ,  G02B6/0088 ,  G02B26/0825 ,  G02B27/0172 ,  G02F1/13306 ,  G02F1/13718 ,  G02F1/29 ,  G02F2203/07

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.

公开(公告)号：US11644675B2

公开(公告)日：2023-05-09

申请号：US17450627

申请日：2021-10-12

Applicant: Magic Leap, Inc.

Inventor： David Manly ,  Vaibhav Mathur ,  Clinton Carlisle ,  Jonathan Alexander Rolon ,  Chulwoo Oh

IPC: G02F1/1335 ,  G02B27/01 ,  G02B27/28 ,  G02F1/13363 ,  G02F1/139

CPC classification number: G02B27/0172 ,  G02B27/281 ,  G02F1/1393 ,  G02F1/13363 ,  G02F1/133502 ,  G02F1/133528 ,  G02B2027/0178 ,  G02F1/133541 ,  G02F1/133638 ,  G02F2203/48 ,  G02F2413/02 ,  G02F2413/05

Abstract: A head-mounted apparatus include an eyepiece that include a variable dimming assembly and a frame mounting the eyepiece so that a user side of the eyepiece faces a towards a user and a world side of the eyepiece opposite the first side faces away from the user. The dynamic dimming assembly selectively modulates an intensity of light transmitted parallel to an optical axis from the world side to the user side during operation. The dynamic dimming assembly includes a variable birefringence cell having multiple pixels each having an independently variable birefringence, a first linear polarizer arranged on the user side of the variable birefringence cell, the first linear polarizer being configured to transmit light propagating parallel to the optical axis linearly polarized along a pass axis of the first linear polarizer orthogonal to the optical axis, a quarter wave plate arranged between the variable birefringence cell and the first linear polarizer, a fast axis of the quarter wave plate being arranged relative to the pass axis of the first linear polarizer to transform linearly polarized light transmitted by the first linear polarizer into circularly polarized light, and a second linear polarizer on the world side of the variable birefringence cell.

公开(公告)号：US11644669B2

公开(公告)日：2023-05-09

申请号：US15927808

申请日：2018-03-21

Applicant: Magic Leap, Inc.

Inventor： Ivan Li Chuen Yeoh ,  Lionel Ernest Edwin ,  Nicole Elizabeth Samec ,  Nastasja U. Robaina ,  Vaibhav Mathur ,  Timothy Mark Dalrymple ,  Jason Schaefer ,  Clinton Carlisle ,  Hui-Chuan Cheng ,  Chulwoo Oh ,  Philip Premysler ,  Xiaoyang Zhang ,  Adam C. Carlson

IPC: G02B27/01 ,  G02B27/00 ,  G06T19/00 ,  H04N13/279 ,  H04N13/341 ,  H04N13/395 ,  H04N13/383 ,  H04N13/344 ,  H04N13/398 ,  G06T15/00

CPC classification number: G02B27/0172 ,  G02B27/0093 ,  G06T15/00 ,  G06T19/006 ,  H04N13/279 ,  H04N13/341 ,  H04N13/344 ,  H04N13/383 ,  H04N13/395 ,  H04N13/398 ,  G02B2027/0134 ,  G02B2027/0147 ,  G02B2027/0178 ,  G02B2027/0185 ,  G06T2210/36 ,  H04N2213/002

Abstract: Methods and systems for depth-based foveated rendering in the display system are disclosed. The display system may be an augmented reality display system configured to provide virtual content on a plurality of depth planes using different wavefront divergence. Some embodiments include monitoring eye orientations of a user of a display system based on detected sensor information. A fixation point is determined based on the eye orientations, the fixation point representing a three-dimensional location with respect to a field of view. Location information of virtual objects to present is obtained, with the location information indicating three-dimensional positions of the virtual objects. Resolutions of at least one virtual object is adjusted based on a proximity of the at least one virtual object to the fixation point. The virtual objects are presented to a user by display system with the at least one virtual object being rendered according to the adjusted resolution.

公开(公告)号：US20230084882A1

公开(公告)日：2023-03-16

申请号：US17988598

申请日：2022-11-16

Applicant: Magic Leap, Inc.

Inventor： Chulwoo Oh ,  Ravi Kumar Komanduri ,  Gary Sharp

IPC: G02F1/137 ,  G02B27/01 ,  G02F1/01 ,  G02B30/34 ,  G02F1/13

Abstract: A switchable optical assembly comprises a switchable waveplate configured to be electrically activated and deactivated to selectively alter the polarization state of light incident thereon. The switchable waveplate comprises first and second surfaces and a liquid crystal layer disposed between the first and second surfaces. The first liquid crystal layer comprises a plurality of liquid crystal molecules. Said first and second surfaces may be curved. Said plurality of liquid crystal molecules may vary in tilt with respect to said first and second surfaces with outward radial distance from an axis through said first and second surfaces and said liquid crystal layer in a plurality of radial directions. The switchable waveplate additionally comprises a first plurality of electrodes to apply an electrical signal across said first liquid crystal layer.

公开(公告)号：US11573424B2

公开(公告)日：2023-02-07

申请号：US17465312

申请日：2021-09-02

Applicant: Magic Leap, Inc.

Inventor： Chulwoo Oh

IPC: G02B27/01 ,  G02B1/02 ,  G02B5/18 ,  F21V8/00 ,  G02B27/00 ,  G02B27/42 ,  G02B6/34

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.