Patents by Inventor Maeong-Ho Seo

Maeong-Ho Seo 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).

  • Feedback control system of an electronic ballast which detects arcing of a lamp
    Patent number: 5770926
    Abstract: The present invention relates to a feedback control system and method for controlling an electronic ballast for driving a lamp where the lamp requires preheating of a cathode of the lamp in order for the electronic ballast to successfully discharge into the lamp and initiate arcing operation in the lamp. The system detects the power consumption level of the lamp and, when the power consumption level indicates that the lamp is not arcing, performs a restart of the lamp wherein the restart function includes preheating the cathode with a preheating current. The present invention reduces production cost and increases safety by detecting operation in the lamp without using external elements.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: June 23, 1998
    Assignee: Samsung Electronics, Co., Ltd.
    Inventors: Nak-Choon Choi, Maeong-Ho Seo