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:
Aug. 14, 2018
Filed:
Sep. 29, 2017
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
A free voltage LED driving device with a high luminous uniformity ratio includes a rectifying device for rectifying an AC voltage applied thereto from outside and outputting a DC voltage; a plurality of LED array parts to have the DC voltage applied thereto to emit light emitting diodes; a plurality of current drain switching devices to have current that is output from each of the plurality of LED array parts applied thereto, outputting a plurality of currents having a drain current value; a series type switching device controlling a transfer of current according to an opening and closing of a plurality of built-in transistors; a current control variable resistance part for varying and adjusting a resistance value so that power is output in a constant manner when the applied AC voltage changes; and a voltage detecting circuit part to detect the DC voltage.