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).

  • 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
  • Publication number: 20200018962
    Abstract: A lens assembly includes two or more polarization-dependent lenses sensitive to either linear or circular polarization, and at least one switchable polarization converter. The switchable polarization converter is configured to rotate linearly polarized light or change the handedness of circularly polarized light when switched on. The lens assembly is configurable to project displayed images on two or more different image planes. For example, when the switchable polarization converter is switched off, the lens assembly projects a displayed image on a first image plane. When the switchable polarization converter is switched on, the lens assembly projects a displayed image on a second image plane different from the first image plane.
    Type: Application
    Filed: July 11, 2018
    Publication date: January 16, 2020
    Inventors: Lu Lu, Yijing Fu, Oleg Yaroshchuk, Kevin James MacKenzie, Mengfei Wang, Alireza Moheghi, John Cooke, Andrew John Ouderkirk
  • Patent number: 10520772
    Abstract: A method disclosed herein includes applying a layer of photoalignment material on a non-flat optical surface, and exposing the layer of photoalignment material to alignment light that satisfies photoalignment criteria that are determined based on a representative thickness profile of a layer of liquid crystal material. The method also includes applying the layer of liquid crystal material over the layer of photoalignment material. Also disclosed is an optical element including a non-flat optical surface, a first layer of photoalignment material applied on the non-flat optical surface and a first layer of liquid crystal material. The layer of photoalignment material is aligned based on alignment light that satisfies photoalignment criteria that are determined based on a representative thickness profile of the layer of liquid crystal polymers.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: December 31, 2019
    Assignee: Facebook Technologies, LLC
    Inventors: Lu Lu, Mengfei Wang, Fenglin Peng, Wai Sze Tiffany Lam, Jacques Gollier
  • Publication number: 20190372993
    Abstract: A method for regulating access to a protected resource is disclosed.
    Type: Application
    Filed: June 5, 2018
    Publication date: December 5, 2019
    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: 20190372958
    Abstract: A method for regulating access to a protected resource is disclosed. The method includes: receiving, via the communication interface from a client application executing on a first device, a first signal including a request to obtain an access token for accessing a protected resource, the request including: a client identifier uniquely identifying the client application; an authorization code for authorizing the client application's access of the protected resource; and a public key associated with the end user; and in response to validating the request: encrypting the authorization code using the public key to generate a first code; and transmitting, via the communication interface to the client application on the first device, a second signal including both an access token for accessing the protected resource and the first code.
    Type: Application
    Filed: February 22, 2019
    Publication date: December 5, 2019
    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: 20190372957
    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: Application
    Filed: July 18, 2018
    Publication date: December 5, 2019
    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: 10495798
    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: August 7, 2018
    Date of Patent: December 3, 2019
    Assignee: Facebook Technologies, LLC
    Inventors: Fenglin Peng, Ying Geng, Yusufu Njoni Bamaxam Sulai, Mengfei Wang, Lu Lu, Jacques Gollier
  • Publication number: 20180335630
    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: Application
    Filed: May 2, 2018
    Publication date: November 22, 2018
    Inventors: Lu Lu, Fenglin Peng, Mengfei Wang, Wai Sze Tiffany Lam, Scott Charles McEldowney