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:
May. 01, 2018
Filed:
Apr. 04, 2017
Magnachip Semiconductor, Ltd., Cheongju-si, KR;
Hyun Mo Ahn, Cheongju-si, KR;
Zhi Yuan Cui, Cheongju-si, KR;
Seung Hwan Lee, Seoul, KR;
In Ho Hwang, Incheon-si, KR;
James Jung, Seoul, KR;
Gyu Ho Lim, Cheongju-si, KR;
Magnachip Semiconductor, Ltd., Cheongju-si, KR;
Abstract
An apparatus to drive a multi-channel light emitting diode (LED) array includes switching transistors connected to LED strings of the multi-channel LED array, error amplifiers connected to the switching transistors, each of the error amplifiers being configured to control current flowing through the LED string to have a target magnitude, and overheating protection circuits connected to the switching transistors, each of the overheating protection circuits being configured to regulate current flowing through a respective switching transistor to have a magnitude less than or equal to the target magnitude.