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:
Jun. 23, 2015
Filed:
Oct. 25, 2013
Samsung Electro-mechanics Co., Ltd., Suwon, Gyunggi-do, KR;
University of Seoul Industry Cooperation Foundation, Seoul, KR;
Dae Hoon Han, Gyunggi-do, KR;
Seo Hyung Kim, Gyunggi-do, KR;
Seung Ryung Ryu, Jeollanam-do, KR;
Joong Ho Choi, Gyunggi-do, KR;
Joo Hyung Lee, Seoul, KR;
Hong Jin Kim, Seoul, KR;
Jae Shin Lee, Gyunggi-do, KR;
Kang Yoon Lee, Seoul, KR;
SAMSUNG ELECTRO-MECHANICS CO., LTD., Suwon-Si, Gyeonggi-Do, KR;
UNIVERSITY OF SEOUL INDUSTRY COOPERATION FOUNDATION, Seoul, KR;
Abstract
There are provided a power supply device switching power input to a primary side to supply the power to a predetermined load connected to a secondary side electrically insulated from the primary side and a control circuit thereof. The control circuit generates a predetermined PWM signal to apply the PWM signal to a dimming switch connected to an end of the load and controls a switching frequency of the primary side, based on a control voltage generated according to a feedback signal according to the power supplied to the load and the PWM signal, and the control voltage maintains a constant difference between a minimum voltage level and a maximum voltage level regardless of a duty of the PWM signal.