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:
Jul. 30, 2013
Filed:
Nov. 05, 2010
Sang Hoon Ha, Gyunggi-do, KR;
Shinichi Iizuka, Gyunggi-do, KR;
Youn Suk Kim, Gyunggi-do, KR;
Chul Hwan Yoon, Gyunggi-do, KR;
Jun Kyung NA, Gyunggi-do, KR;
Sang Hoon Ha, Gyunggi-do, KR;
Shinichi Iizuka, Gyunggi-do, KR;
Youn Suk Kim, Gyunggi-do, KR;
Chul Hwan Yoon, Gyunggi-do, KR;
Jun Kyung Na, Gyunggi-do, KR;
Samsung Electro-Mechanics Co., Ltd., Gyunggi-Do, KR;
Abstract
A power control system includes a power regulator having a plurality of power PMOS transistors connected to a power source in parallel and configured to supply current and voltage controlled according to an input lamp voltage, a current sensing unit connected to the power source and configured to sense currents flowing through a plurality of target PMOS transistors located at predetermined positions among the PMOS transistors, a current mirror unit connected to a first regulated voltage terminal and configured to generate a plurality of currents equal to the sensed currents, a comparator unit configured to total the generated currents to convert the totaled currents into a voltage, and to generate a voltage difference between the voltage and a predetermined reference voltage, and a current bias circuit unit connected to a second regulated voltage terminal and configured to control a bias current according to the generated voltage difference.