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. 27, 2021
Filed:
May. 18, 2018
Myeong-kook Gong, Yongin-si, KR;
Da-young Gong, Yongin-si, KR;
Myeong-Kook Gong, Yongin-si, KR;
Da-Young Gong, Yongin-si, KR;
Other;
Abstract
The present inventions presents an LED lighting device for preventing flickering. The device comprises: a rectification unit receiving an alternating current voltage applied from an alternating current power source and rectifying the same so as to output a direct current; a first light-emitting unit receiving the direct current applied thereto and adjusting a first constant current so as to make a first LED array emit light; a second light-emitting unit receiving the adjusted first constant current applied thereto and adjusting a second constant current so as to make a second LED array emit light; and a serial switching unit receiving the direct current and the adjusted first and second constant currents applied thereto so as to control current transmission according to the opening/closing of a plurality of embedded transistors, wherein the direct current and the first constant current, which are to be applied, are applied by passing through first and second diodes, respectively.