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:
Apr. 14, 2026
Filed:
Apr. 12, 2023
Seoul Viosys Co., Ltd., Ansan-si, KR;
Yong Woo Ryu, Ansan-si, KR;
SEOUL VIOSYS CO., LTD., Ansan-si, KR;
Abstract
A light emitting device including a first sub-unit emitting light of a first wavelength; a second sub-unit disposed under the first sub-unit and emitting light of a second wavelength longer than the first wavelength; and a third sub-unit disposed under the second sub-unit and emitting light of a third wavelength longer than the first wavelength, in which the first sub-unit, the second sub-unit, and the third sub-unit include a first LED stack, a second LED stack, and a third LED stack, respectively, and the first sub-unit further includes a first upper contact electrode and a first lower contact electrode electrically connected to an upper surface and a lower surface of the first LED stack, respectively, and an extraction element for increasing a light extraction efficiency of the first wavelength.