Patents by Inventor Mengfei Wang

Mengfei Wang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11016226
    Abstract: A variofocal display device includes an image source and a display. The image source is configured to project image light. The display includes a first optical diffuser and a second optical diffuser. The display is configured to receive the image light. The first diffuser is configured to diffuse the image light at the first optical diffuser when the image light has a first polarization, and to diffuse the image light at the second optical diffuser when the image light is configured has a second polarization different from the first polarization. A method of displaying images using a varifocal display device is also disclosed.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: May 25, 2021
    Assignee: Facebook Technologies, LLC
    Inventors: Mengfei Wang, Gang Li, Lu Lu, Yunqi Li
  • Patent number: 11002898
    Abstract: Disclosed herein are techniques for displaying images on multiple image planes in a near-eye display system. A switchable optical device includes a first polarizer configurable to polarize incident light into light of a first circular polarization state, and a second polarizer configurable to transmit light of a second circular polarization state and reflect light of the first circular polarization state into light of the first circular polarization state. The switchable optical device also includes a partial reflector positioned between the first polarizer and the second polarizer. The partial reflector is configured to transmit light from the first polarizer and reflect light from the second polarizer, where the reflected light and the light from the second polarizer have different polarization states. At least one of the first polarizer or the second polarizer includes a cholesteric liquid crystal (CLC) circular polarizer that is switchable by a voltage signal.
    Type: Grant
    Filed: October 18, 2019
    Date of Patent: May 11, 2021
    Assignee: FACEBOOK TECHNOLOGIES, LLC
    Inventors: Fenglin Peng, Ying Geng, Yusufu Njoni Bamaxam Sulai, Mengfei Wang, Lu Lu, Jacques Gollier
  • Patent number: 10962840
    Abstract: A photoalignment method includes photoaligning a first liquid crystal cell and using the photoaligned first liquid crystal cell as a mask in the photoalignment of a second liquid crystal cell. The method may increase spatial dynamic range or decrease pitch.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: March 30, 2021
    Assignee: Kent State University
    Inventors: Hiroshi Yokoyama, Mengfei Wang
  • Publication number: 20210088700
    Abstract: A variofocal display device includes an image source and a display. The image source is configured to project image light. The display includes a first optical diffuser and a second optical diffuser. The display is configured to receive the image light. The first diffuser is configured to diffuse the image light at the first optical diffuser when the image light has a first polarization, and to diffuse the image light at the second optical diffuser when the image light is configured has a second polarization different from the first polarization. A method of displaying images using a varifocal display device is also disclosed.
    Type: Application
    Filed: December 13, 2019
    Publication date: March 25, 2021
    Inventors: Mengfei WANG, Gang LI, Lu LU, Yunqi LI
  • Publication number: 20210080726
    Abstract: A display device includes a projector and a display that has a first surface and a second surface. The projector is configured to project image light toward the display. The display is configured to output diffused image light from the first surface and to transmit ambient light from the second surface to the first surface. The display device also includes an optical assembly that has a substrate with substantially uniform thickness. The optical assembly is configured to receive the diffused image light and transmit a portion of the diffused image light output from the first surface of the display at a first optical power. The optical assembly is also configured to receive the ambient light and transmit a portion of the ambient light through the optical assembly at a second optical power that is less than the first optical power.
    Type: Application
    Filed: March 5, 2020
    Publication date: March 18, 2021
    Inventors: Ying GENG, Brian WHEELWRIGHT, Jacques GOLLIER, Yusufu Njoni Bamaxam SULAI, Babak AMIRSOLAIMANI, Weichuan GAO, Gang LI, Mengfei WANG, Adrian TRAVIS
  • Publication number: 20210084022
    Abstract: An electronic device is disclosed. The electronic device includes a memory, a camera module, a communications module, and a processor that is configured to: receive, from the camera module, image data associated with a machine-readable optical label, the optical label encoding transaction details of a transfer of data to a recipient account, wherein the transaction details do not indicate an identity of the recipient account; receive a user input indicating authorization to initiate a transfer of data, via a protected resource, from an account associated with the user to the recipient account; and in response to receiving the user input, generate a request for initiating the transfer of data based on the transaction details, the request including an access token for use in authenticating the user on requests to access the protected resource.
    Type: Application
    Filed: November 25, 2020
    Publication date: March 18, 2021
    Applicant: The Toronto-Dominion Bank
    Inventors: Milos DUNJIC, Anthony Haituyen NGUYEN, Yubing LIU, Arthur Carroll CHOW, Casey Lyn DOYLE, Richard John Frederick THAKE, Mengfei WANG, Aaron Ashish HUDALI, Gregory Albert KLIEWER, Martin Albert LOZON, Yusbel Garcia DIAZ, Gareth DALY, Masashi KOBAYASHI, Randall John BAST
  • Publication number: 20210033770
    Abstract: A first layer of anisotropic material extends along a first plane and includes anisotropic components being parallel to a second plane non-parallel and non-perpendicular to the first plane. The anisotropic components are arranged in cycloidal or helical patterns. The cycloidal or helical patterns define one or more Bragg planes that are non-parallel and non-perpendicular to the first plane and either substantially parallel or substantially perpendicular to the second plane.
    Type: Application
    Filed: October 16, 2020
    Publication date: February 4, 2021
    Inventors: Lu LU, Xiayu FENG, Mengfei WANG, Hao YU, Ryan LI, Yun-Han LEE, Junren WANG, Barry David SILVERSTEIN
  • Patent number: 10890778
    Abstract: An optical system includes a grating including at least one substrate and a grating structure coupled to the at least one substrate. The grating structure is configured to diffract a first light having an incidence angle within a predetermined range. The optical system also includes a polarizer configured to transmit the first light diffracted by the grating structure and block a second light reflected by a surface of the at least one substrate.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: January 12, 2021
    Assignee: FACEBOOK TECHNOLOGIES, LLC
    Inventors: Yun-Han Lee, Mengfei Wang, Junren Wang, Lu Lu, Robin Sharma, Gregory Olegovic Andreev, Garam Young, Andrew John Ouderkirk, Babak Amirsolaimani, Fenglin Peng, Barry David Silverstein
  • Publication number: 20210006566
    Abstract: A computer-implemented method is disclosed. The method includes: receiving, from a web server associated with a protected resource, a first signal including a request to validate a bearer token submitted by a client device to the web server, the bearer token including a digital signature; validating the bearer token, the validating including verifying the digital signature using a public key associated with an end user of the client device; and in response to validating the bearer token, sending to the web server a second signal including a notification that the bearer token is valid.
    Type: Application
    Filed: September 22, 2020
    Publication date: January 7, 2021
    Applicant: The Toronto-Dominion Bank
    Inventors: Milos DUNJIC, Anthony Haituyen NGUYEN, Yubing LIU, Arthur Carroll CHOW, Casey Lyn DOYLE, Richard John Frederick THAKE, Mengfei WANG, Aaron Ashish HUDALI, Gregory Albert KLIEWER, Martin Albert LOZON, Yusbel Garcia DIAZ, Gareth DALY, Masashi KOBAYASHI, Randall John BAST
  • Patent number: 10880288
    Abstract: An electronic device is disclosed. The electronic device includes a memory, a camera module, a communications module, and a processor that is configured to: receive first credentials identifying a user; transmit, via the communications module to an authentication server, a first signal including a request to verify that the first credentials are authorized for accessing a protected resource; when the first credentials are authorized for accessing the protected resource, receive, via the communications module from the authentication server, a second signal including an access token for use in authenticating the user on requests to access the protected resource; receive, from the camera module, image data associated with a machine-readable optical label, the optical label encoding transaction details of a first transaction; and generate a request based on the transaction details to access the protected resource for initiating the first transaction, the request including the access token.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: December 29, 2020
    Assignee: The Toronto-Dominion Bank
    Inventors: Milos Dunjic, Anthony Haituyen Nguyen, Yubing Liu, Arthur Carroll Chow, Casey Lyn Doyle, Richard John Frederick Thake, Mengfei Wang, Aaron Ashish Hudali, Gregory Albert Kliewer, Martin Albert Lozon, Yusbel Garcia Diaz, Gareth Daly, Masashi Kobayashi, Randall John Bast
  • Publication number: 20200393690
    Abstract: An optical system includes a grating including at least one substrate and a grating structure coupled to the at least one substrate. The grating structure is configured to diffract a first light having an incidence angle within a predetermined range. The optical system also includes a polarizer configured to transmit the first light diffracted by the grating structure and block a second light reflected by a surface of the at least one substrate.
    Type: Application
    Filed: June 11, 2019
    Publication date: December 17, 2020
    Inventors: Yun-Han LEE, Mengfei WANG, Junren WANG, Lu LU, Robin SHARMA, Gregory Olegovic ANDREEV, Garam YOUNG, Andrew John OUDERKIRK, Babak AMIRSOLAIMANI, Fenglin PENG, Barry David SILVERSTEIN
  • Patent number: 10839609
    Abstract: An example device may include an electronic display configured to generate an augmented reality image element and an optical combiner configured to receive the augmented reality image element along with ambient light from outside the device. The optical combiner may be configured to provide an augmented reality image having the augmented reality image element located within a portion of an ambient image formed from the ambient light. The device may also include a dimmer element configured to selectively dim the portion of the ambient image in which the augmented reality image element is located.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: November 17, 2020
    Assignee: Facebook Technologies, LLC
    Inventors: Jasmine Soria Sears, Alireza Moheghi, Oleg Yaroshchuk, Douglas Robert Lanman, Andrew Maimone, Kavitha Ratnam, Nathan Matsuda, Lu Lu, Nicholas Diorio, Mengfei Wang
  • Patent number: 10834096
    Abstract: A method for regulating access to a protected resource is disclosed.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: November 10, 2020
    Assignee: THE TORONTO-DOMINION BANK
    Inventors: Milos Dunjic, Anthony Haituyen Nguyen, Yubing Liu, Arthur Carroll Chow, Casey Lyn Doyle, Richard John Frederick Thake, Mengfei Wang, Aaron Ashish Hudali, Gregory Albert Kliewer, Martin Albert Lozon, Yusbel Garcia Diaz, Gareth Daly, Masashi Kobayashi, Randall John Bast
  • Publication number: 20200326547
    Abstract: An optical device is provided. The optical device includes a first liquid crystal (“LC”) cell and a second LC cell stacked with the first LC cell. The first and second LC cells are configured to provide a phase retardation to a light transmitted therethrough. The optical device also includes at least one first compensation film disposed between the first LC cell and the second LC cell. The optical device also includes a second compensation film disposed at a first side of the first LC cell opposite to a second side of the first LC cell where the at least one first compensation film is disposed. The optical device also includes a third compensation film disposed at a first side of the second LC cell opposite to a second side of the second LC cell where the at least one first compensation film is disposed.
    Type: Application
    Filed: April 29, 2020
    Publication date: October 15, 2020
    Inventors: Lu LU, Fenglin PENG, Mengfei WANG, Wai Sze Tiffany LAM, Scott Charles MCELDOWNEY
  • Publication number: 20200233270
    Abstract: A photoalignment method includes photoaligning a first liquid crystal cell and using the photoaligned first liquid crystal cell as a mask in the photoalignment of a second liquid crystal cell. The method may increase spatial dynamic range or decrease pitch.
    Type: Application
    Filed: September 25, 2018
    Publication date: July 23, 2020
    Applicant: Kent State University
    Inventors: Hiroshi Yokoyama, Mengfei Wang
  • Patent number: 10678057
    Abstract: An optical element comprising a stacked liquid crystal (LC) structure for rotating polarization (e.g., handedness) of an incident circularly polarized light over a broad wavelength and incident angle for head-mounted displays (HMD)s display application is proposed. The stacked LC structure has a dual cell structures, which includes at least a first LC cell and a second LC cell, and the stacked LC structure rotates the polarized light for a broad band of light (e.g., visible spectrum) over a given field a view. The performance of designed dual LC cells structures may be optimized for narrow band wavelength and a narrow incident angle for different application cases.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: June 9, 2020
    Assignee: Facebook Technologies, LLC
    Inventors: Lu Lu, Fenglin Peng, Mengfei Wang, Wai Sze Tiffany Lam, Scott Charles McEldowney
  • Patent number: 10642048
    Abstract: Techniques disclosed herein relate to folded optical systems for near-eye display. In one embodiment, an optical device includes a first polarizer, a second polarizer, and a partial reflector positioned between the first polarizer and the second polarizer. The first polarizer is configured to polarize incident light into light of a first circular polarization state. The second polarizer is configured to transmit light of a second circular polarization state and reflect light of the first circular polarization state without changing its polarization state. The partial reflector is configured to transmit light from the first polarizer, and reflect light from the second polarizer. The light reflected by the partial reflector and the light from the second polarizer have different polarization states.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: May 5, 2020
    Assignee: Facebook Technologies, LLC
    Inventors: Fenglin Peng, Lu Lu, Mengfei Wang, Ying Geng, Jacques Gollier
  • Publication number: 20200111259
    Abstract: An example device may include an electronic display configured to generate an augmented reality image element and an optical combiner configured to receive the augmented reality image element along with ambient light from outside the device. The optical combiner may be configured to provide an augmented reality image having the augmented reality image element located within a portion of an ambient image formed from the ambient light. The device may also include a dimmer element configured to selectively dim the portion of the ambient image in which the augmented reality image element is located.
    Type: Application
    Filed: July 3, 2019
    Publication date: April 9, 2020
    Inventors: Jasmine Soria Sears, Alireza Moheghi, Oleg Yaroshchuk, Douglas Robert Lanman, Andrew Maimone, Kavitha Ratnam, Nathan Matsuda, Lu Lu, Nicholas Diorio, Mengfei Wang
  • Publication number: 20200049872
    Abstract: Disclosed herein are techniques for displaying images on multiple image planes in a near-eye display system. A switchable optical device includes a first polarizer configurable to polarize incident light into light of a first circular polarization state, and a second polarizer configurable to transmit light of a second circular polarization state and reflect light of the first circular polarization state into light of the first circular polarization state. The switchable optical device also includes a partial reflector positioned between the first polarizer and the second polarizer. The partial reflector is configured to transmit light from the first polarizer and reflect light from the second polarizer, where the reflected light and the light from the second polarizer have different polarization states. At least one of the first polarizer or the second polarizer includes a cholesteric liquid crystal (CLC) circular polarizer that is switchable by a voltage signal.
    Type: Application
    Filed: October 18, 2019
    Publication date: February 13, 2020
    Inventors: Fenglin Peng, Ying Geng, Yusufu Njoni Bamaxam Sulai, Mengfei Wang, Lu Lu, Jacques Gollier
  • Publication number: 20200049992
    Abstract: Techniques disclosed herein relate to folded optical systems for near-eye display. In one embodiment, an optical device includes a first polarizer, a second polarizer, and a partial reflector positioned between the first polarizer and the second polarizer. The first polarizer is configured to polarize incident light into light of a first circular polarization state. The second polarizer is configured to transmit light of a second circular polarization state and reflect light of the first circular polarization state without changing its polarization state. The partial reflector is configured to transmit light from the first polarizer, and reflect light from the second polarizer. The light reflected by the partial reflector and the light from the second polarizer have different polarization states.
    Type: Application
    Filed: August 7, 2018
    Publication date: February 13, 2020
    Inventors: Fenglin Peng, Lu Lu, Mengfei Wang, Ying Geng, Jacques Gollier