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:
Jan. 09, 2024
Filed:
Dec. 01, 2020
Seoul Semiconductor Co., Ltd., Gyeonggi-do, KR;
Bo Yong Han, Gyeonggi-do, KR;
Seoul Semiconductor Co., Ltd., Gyeonggi-do, KR;
Abstract
A light emitting device is adapted to realize white light and includes a first light emitting diode chip emitting light having a first peak wavelength in the range of 400 nm to 420 nm, a second light emitting diode chip emitting light having a second peak wavelength in the range of 420 nm to 440 nm, and a wavelength converter covering the first and second light emitting diode chips. The wavelength converter including a blue phosphor, a green phosphor, and a red phosphor. When a maximum value of a spectral power distribution of the light emitting device or a maximum of a reference spectral power distribution of black body radiation is 100%, a difference between the spectral power distribution of the light emitting device and the reference spectral power distribution is less than 20% at each wavelength in the wavelength range of 440 nm to 640 nm.