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. 19, 2013
Filed:
Dec. 29, 2010
Ching-ho Chou, Taipei, TW;
Yung-chuan LU, Taipei, TW;
Edy Chandra, Taipei, TW;
Chao-wei Tsai, Taipei, TW;
Ching-Ho Chou, Taipei, TW;
Yung-Chuan Lu, Taipei, TW;
Edy Chandra, Taipei, TW;
Chao-Wei Tsai, Taipei, TW;
Delta Electronics, Inc., Taoyuan Hsien, TW;
Abstract
The configurations of an end of lamp life protection circuit for a ballast and a method thereof are provided in the present invention. The proposed circuit includes a voltage-dividing circuit receiving an input voltage and outputting a first and a second divided voltages and a switch apparatus raising the first divided voltage when the second divided voltage is less than a first pre-determined threshold value and turning off the ballast when the first divided voltage is higher than a second pre-determined threshold value.