Patents by Inventor Arnel Dela Cruz

Arnel Dela Cruz 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).

  • Lamp driving topology
    Patent number: 6559606
    Abstract: A lamp driving system that includes a first impedance and a second impedance coupled to the secondary side of a transformer, where the second impedance has a phase shifted value compared to the first impedance. Two lamp loads are connected in series together, and in parallel to the first and second impedances and to the transformer. The phase shift between the impedances ensures that the transformer need not supply double the striking voltage to strike the series-connected lamps. A difference in the resistance between the first and second impedances ensures that the lamps ignite in a specified sequence.
    Type: Grant
    Filed: October 23, 2001
    Date of Patent: May 6, 2003
    Assignee: O2Micro International Limited
    Inventors: John Chou, Arnel Dela Cruz
  • LAMP DRIVING TOPOLOGY
    Publication number: 20030076052
    Abstract: A lamp driving system that includes a first impedance and a second impedance coupled to the secondary side of a transformer, where the second impedance has a phase shifted value compared to the first impedance. Two lamp loads are connected in series together, and in parallel to the first and second impedances and to the transformer. The phase shift between the impedances ensures that the transformer need not supply double the striking voltage to strike the series-connected lamps. A difference in the resistance between the first and second impedances ensures that the lamps ignite in a specified sequence.
    Type: Application
    Filed: October 23, 2001
    Publication date: April 24, 2003
    Applicant: 02 Micro International Limited
    Inventors: John Chou, Arnel Dela Cruz