Patents by Inventor John F. Chang

John F. Chang 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: 11978265
    Abstract: A method for displaying lane information on an augmented reality display includes receiving roadway data. The roadway data includes information about a roadway along a route of a vehicle. The roadway includes a plurality of lanes. The roadway data includes lane information about at least one of the plurality of lanes along the route of the vehicle. The method further includes receiving vehicle-location data. The vehicle-location data indicates a location of the vehicle. The method further includes determining that that the vehicle is approaching a road junction using the vehicle-location data and the roadway data. The method further includes, in response to determining that the vehicle is approaching the road junction, transmitting a command signal to a dual-focal plane augmented reality display to display at least one virtual image that is indicative of the lane information.
    Type: Grant
    Filed: March 11, 2022
    Date of Patent: May 7, 2024
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Joseph F. Szczerba, John P. Weiss, Kai-Han Chang, Thomas A. Seder
  • Patent number: 11971544
    Abstract: A hybrid augmented reality head-up display system for displaying graphics upon a windscreen of a vehicle includes a windscreen having a transparent substrate including light emitting particles dispersed within, a primary graphic projection device for generating a first set of images upon the windscreen of the vehicle based on visible light, and a secondary graphic projection device for generating a second set of images upon a secondary area the windscreen of the vehicle based on an excitation light. The first set of images are displayed upon a primary area of the windscreen. The light emitting particles in the windscreen emit visible light in response to absorbing the excitation light. The first set of images displayed upon the primary area of the windscreen cooperate with the second set of images displayed upon the secondary area of the windscreen to create an edge-to-edge augmented reality view.
    Type: Grant
    Filed: May 20, 2022
    Date of Patent: April 30, 2024
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Thomas A. Seder, Kai-Han Chang, Joseph F. Szczerba, John P. Weiss
  • Publication number: 20240099892
    Abstract: An apparatus includes a shaft, an expandable dilator, and at least one ventilation pathway. The shaft defines a longitudinal axis and includes a distal and proximal ends with at least one shaft lumen. The expandable dilator includes body with its own proximal and distal ends. The body is configured to transition between a contracted state and an expanded state. The body is configured to dilate a Eustachian tube of a patient in the expanded state. The at least one ventilation pathway is configured to provide ventilation from the distal end of the body to the proximal end of the body when the body is in the expanded state. In some examples, the ventilation pathway includes a set of transversely oriented vent openings formed through the shaft. In some other examples, the ventilation pathway includes a space defined between one or more radially outwardly protruding features of the expandable dilator.
    Type: Application
    Filed: October 27, 2023
    Publication date: March 28, 2024
    Inventors: Peter F. Campbell, Daniel T. Harfe, Hung V. Ha, Ketan P. Muni, Andy Nguyen, Sivette Lam, John Y. Chang, Eric Goldfarb
  • Patent number: 11935200
    Abstract: A method for displaying infrastructure information on a multi-focal plane augmented reality display of a vehicle includes receiving infrastructure data. The infrastructure data includes information about a location of at least one infrastructure along a route of the vehicle. The method further includes receiving vehicle-location data. The vehicle-location data includes information about a location of the vehicle. The method further includes determining a position of the vehicle relative to the location of the least one infrastructure using the infrastructure data and the vehicle-location data. The method further includes transmitting a command signal to the multi-focal plane augmented reality display to display a virtual image showing the infrastructure information of the infrastructure on the multi-focal plane augmented reality display.
    Type: Grant
    Filed: March 18, 2022
    Date of Patent: March 19, 2024
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Joseph F. Szczerba, John P. Weiss, Kai-Han Chang, Thomas A. Seder
  • Patent number: 9212908
    Abstract: In comb drive vibratory gyroscopes, drive-induced Coriolis accelerometer offset is effectively canceled by demodulating the output during equal times of in-phase and anti-phase drive of the shuttle with respect to the velocity signal used for angular rate demodulation. This reduces or eliminates the corresponding thermal and die-stress effects otherwise needing calibration.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: December 15, 2015
    Assignee: Analog Devices, Inc.
    Inventors: John A. Geen, John F. Chang
  • Publication number: 20130283908
    Abstract: In comb drive vibratory gyroscopes, drive-induced Coriolis accelerometer offset is effectively canceled by demodulating the output during equal times of in-phase and anti-phase drive of the shuttle with respect to the velocity signal used for angular rate demodulation. This reduces or eliminates the corresponding thermal and die-stress effects otherwise needing calibration.
    Type: Application
    Filed: April 26, 2012
    Publication date: October 31, 2013
    Applicant: ANALOG DEVICES, INC.
    Inventors: John A. Geen, John F. Chang