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:
Mar. 10, 1998
Filed:
Apr. 24, 1996
Applicant:
Inventor:
Maeng-ho Seo, Kyonggi-do, KR;
Assignee:
Samsung Electronics Co., Ltd., Suwon, KR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
315 97 ; 315105 ; 315107 ; 315308 ;
Abstract
A feedback control system of ballast which has function to detect the number of lamp and is applied to an integrated circuit to control the ballast for a fluorescent lamp etc, and provides the ballast with the feedback control system which can detect the number of lamp, control ballast continuously by means of the n-lamp detector and soft start controller which produce the compensated current from the feedback current and direct link voltage. Therefore, the feedback control system can control the ballast accurately according to the load change such as the change of input voltage, number of lamp.