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:
Jan. 18, 2022
Filed:
Jul. 05, 2019
Lg Innotek Co., Ltd., Seoul, KR;
Jae Hyun Han, Seoul, KR;
LG INNOTEK CO., LTD., Seoul, KR;
Abstract
A light source driving device may include a DC-DC conversion unit for generating an output voltage by adjusting a level of an input voltage, and a first light-emitting unit and a second light-emitting unit, which are driven by the output voltage of the DC-DC conversion unit. A regulator may be connected to the output end of the second light-emitting unit, and a controller may have a feedback terminal connected to the output ends of the first light-emitting unit and the second light-emitting unit. The regulator may operate such that a preset target current is supplied to the second light-emitting unit. The controller may adjust a duty of the pulse control signal based on the entire preset target current of the first light-emitting unit and the second light-emitting unit and the feedback current inputted through the feedback terminal.