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:
Oct. 05, 2021
Filed:
Jul. 25, 2019
Lg Innotek Co., Ltd., Seoul, KR;
Jae Hyun Han, Seoul, KR;
LG INNOTEKCO., LTD., Seoul, KR;
Abstract
A DC-DC converter according to an embodiment comprises: a first converter unit for generating a first output voltage by adjusting a level of an input voltage according to a pulse control signal applied to a first switch element; a first light emitting unit disposed at an output end of the first converter unit; a second converter unit, connected to the output end of the first converter unit, for generating a second output voltage by adjusting a level of the input voltage or the first output voltage according to a pulse control signal applied to a second switch element; a second light emitting unit disposed at an output end of the second converter unit; and a control unit for generating pulse control signals to be applied to the first switch element and the second switch element separately according to driving modes of the first and second light emitting units, and for controlling switching operations of the first and second switch elements according to the generated pulse control signals.