The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 04, 2003
Filed:
Feb. 05, 2001
Applicant:
Inventors:
Chin-Sien Moo, Kaohsiung Hsien, TW;
Tsai-Fu Lin, Pingtung, TW;
Assignee:
Yin Nan Enterprises Co., Ltd., Kaohsiung Hsien, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B 4/136 ;
U.S. Cl.
CPC ...
H05B 4/136 ;
Abstract
A multi-lamp protection circuit for an electronic ballast includes an inverter circuit of various types, and a transistor switch provided in the inverter circuit and connected to a plurality of lamp circuits, each lamp circuit connected respectively in series to a transistor switch and a disorder checking circuit. The signal got by the disorder checking circuits mixed with a control signal starts resonance transistors so as to checking disorder and separating the damaged lamp(s), lessening its producing cost and achieving normal efficiency of the lamps.