Patents by Inventor Yan Ming Li

Yan Ming Li 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: 8829793
    Abstract: In various embodiments, a high pressure discharge lamp is provided. The high pressure discharge lamp may include a lamp axis, and a two-ended discharge vessel that surrounds a discharge volume, electrodes extending into the discharge volume enveloped by the discharge vessel, and a fill that includes metal halides being accommodated in the discharge volume, the discharge vessel being surrounded by an outer bulb with a base at one end and being held therein by a frame, wherein the frame comprises a short supply lead and a long supply lead, the long supply lead comprising two straight conductors with a winding part therebetween, the winding part executing at most 1.25 turns about the discharge vessel.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: September 9, 2014
    Assignee: OSRAM Gesellschaft mit beschraenkter Haftung
    Inventors: Michael Beau, Yan Ming Li, Thomas Schroeder
  • Publication number: 20100007275
    Abstract: In various embodiments, a high pressure discharge lamp is provided. The high pressure discharge lamp may include a lamp axis, and a two-ended discharge vessel that surrounds a discharge volume, electrodes extending into the discharge volume enveloped by the discharge vessel, and a fill that includes metal halides being accommodated in the discharge volume, the discharge vessel being surrounded by an outer bulb with a base at one end and being held therein by a frame, wherein the frame comprises a short supply lead and a long supply lead, the long supply lead comprising two straight conductors with a winding part therebetween, the winding part executing at most 1.25 turns about the discharge vessel.
    Type: Application
    Filed: July 14, 2009
    Publication date: January 14, 2010
    Applicant: OSRAM Gesellschaft mit beschraenkter Haftung
    Inventors: Michael Beau, Yan Ming Li, Thomas Schroeder
  • Patent number: 7176632
    Abstract: Operation of an HID lamp may be improved by forming a glow generating recess on an exterior side the electrode. The lamp may be of standard construction with a light transmissive lamp envelope having a wall defining an enclosed volume. At least one electrode assembly is extended in a sealed fashion from the exterior of the lamp through the lamp envelope wall to be exposed at an inner end of the electrode assembly to the enclosed volume. A metal halide lamp fill is enclosed with an inert fill gas. The inner end of the electrode is formed with a recess having a least spanning dimension S and a recess depth of D where S is greater the electron ionization mean free path but less than twice the cathode fall plus negative glow distances, throughout the glow discharge phase of starting, for the chosen fill gas composition and pressure (cold).
    Type: Grant
    Filed: March 15, 2005
    Date of Patent: February 13, 2007
    Assignee: Osram Sylvania Inc.
    Inventors: Alan L. Lenef, Helmar Adler, A. Bowman Budinger, Yan Ming Li
  • Patent number: 5723951
    Abstract: An apparatus and method for operating an arc discharge lamp which can be hot restarted is described. The method involves providing low microwave power after the lamp ballast is disconnected from the lamp. The microwave power is modulated such that conductivity is maintained within the lamp as the lamp cools. Restarting the lamp is accomplished by reconnecting the ballast at any time. In one embodiment, the apparatus of the invention includes an arc discharge lamp and ballast coupled together with a switch to turn the lamp on and off. A microwave power supply is connected in parallel with the ballast and is coupled to the lamp when the ballast is shut off. The invention allows for hot restart of the arc lamp without requiring a high voltage pulse.
    Type: Grant
    Filed: June 26, 1996
    Date of Patent: March 3, 1998
    Assignee: Osram Sylvania Inc.
    Inventors: Wojciech W. Byszewski, Yan Ming Li, A. Bowman Budinger