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:
Dec. 22, 2020
Filed:
Jan. 25, 2019
Lumens Co., Ltd., Yongin-si, KR;
Jungwoo Lee, Yongin-si, KR;
Junhyung Lim, Yongin-si, KR;
Hyunpyo Hong, Yongin-si, KR;
Jihye Chang, Yongin-si, KR;
LUMENS CO., LTD., Yongin-si, KR;
Abstract
Disclosed is a color temperature variable light emitting diode module that is driven when alternating current power is applied thereto. The light emitting diode module includes: a substrate; and a plurality of light emitting diode groups arranged on a substrate and including a first light emitting diode group emitting light at an input voltage level equal to or above a first reference voltage and a second light emitting diode group emitting light at an input voltage level equal to or above a second reference voltage higher than the first reference voltage. The first light emitting diode group includes: a first light emitting diode unit consisting of one or more light emitting diodes connected in series with each other and a second light emitting diode unit connected in series with the first light emitting diode unit and consisting of one or more light emitting diodes connected in series with each other; first wavelength converting elements disposed on the corresponding light emitting diodes constituting the first light emitting diode unit and the second light emitting diode unit and converting primary light emitted from the first light emitting diode unit and the second light emitting diode unit into secondary light having a first color temperature; and second wavelength converting elements disposed on the first light emitting diode group, the first wavelength converting elements, and the second light emitting diode group and converting some or all of primary light emitted from the first light emitting diode group, primary light emitted from the second light emitting diode group, and the secondary light emitted through the first wavelength converting elements into tertiary light having a second color temperature. Mixed light of the secondary light and the tertiary light is emitted or either the secondary light or the tertiary light is emitted in response to an input voltage level.