Patents by Inventor Sean Lei

Sean Lei 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).

  • Inlay Element, a Module Termination Unit, an Input/Output Device, a Modular Process Control System and a Method for Assembling an Input/Output Device
    Publication number: 20230380094
    Abstract: An inlay element configured to be arranged in a module termination unit of a modular process control system includes a first connector section and a second connector section, wherein the first connector section is configured to be connected to at least one controller module and wherein the second connector section is configured to be connected to at least one fieldbus device.
    Type: Application
    Filed: May 23, 2023
    Publication date: November 23, 2023
    Applicant: ABB Schweiz AG
    Inventors: Thomas Keul, Can Ozer, Malte Ehlenbroeker, Martin Rydberg, Sean-Lei Wang
  • Driver circuit for reduced form factor solid state light source lamp
    Patent number: 8674605
    Abstract: A solid state light source driver circuit, system and method are provided. The driver circuit includes a rectifier circuit, an energy storage element coupled thereto, a current bleeder circuit coupled thereto, and a switch. The rectifier circuit receives AC input and provides unregulated DC voltage. The switch closes to couple some of the unregulated DC voltage to the energy storage element, and opens to transfer energy to drive the light source. A power factor controller circuit provides an output signal to control the switch. The current bleeder circuit provides supply voltage to the power factor controller circuit within a range and maintains a current flow associated with the AC input that exceeds a predetermined threshold. A constant off-time controller circuit provides a switching frequency control signal to the power factor controller circuit. An EMI filter reduces generated EMI noise.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: March 18, 2014
    Assignee: OSRAM SYLVANIA Inc.
    Inventors: Voravit Puvanakijjakorn, Sean Lei, Arunava Dutta
  • DRIVER CIRCUIT FOR REDUCED FORM FACTOR SOLID STATE LIGHT SOURCE LAMP
    Publication number: 20120286663
    Abstract: A solid state light source driver circuit, system and method are provided. The driver circuit includes a rectifier circuit, an energy storage element coupled thereto, a current bleeder circuit coupled thereto, and a switch. The rectifier circuit receives AC input and provides unregulated DC voltage. The switch closes to couple some of the unregulated DC voltage to the energy storage element, and opens to transfer energy to drive the light source. A power factor controller circuit provides an output signal to control the switch. The current bleeder circuit provides supply voltage to the power factor controller circuit within a range and maintains a current flow associated with the AC input that exceeds a predetermined threshold. A constant off-time controller circuit provides a switching frequency control signal to the power factor controller circuit. An EMI filter reduces generated EMI noise.
    Type: Application
    Filed: January 20, 2012
    Publication date: November 15, 2012
    Applicant: OSRAM SYLVANIA INC.
    Inventors: Voravit Puvanakijjakorn, Sean Lei, Arunava Dutta