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. 06, 2021
Filed:
Jun. 03, 2019
Applicant:
Bridgelux, Inc., Fremont, CA (US);
Inventor:
Tao Xu, Fremont, CA (US);
Assignee:
Bridgelux, Inc., Fremont, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 33/50 (2010.01); H01L 25/075 (2006.01); H01L 33/62 (2010.01);
U.S. Cl.
CPC ...
H01L 33/504 (2013.01); H01L 25/0753 (2013.01); H01L 33/62 (2013.01); H01L 2933/0041 (2013.01);
Abstract
There is provided a white light emitting device comprising: first and second LEDs operable to generate excitation light having a dominant wavelength in a range from 440 nm to 480 nm and mounted on a substrate; a first photoluminescence material which generates light having a peak emission wavelength in a range from 500 nm to 590 nm; and a second photoluminescence material which generates light having a peak emission wavelength in a range from 600 nm to 650 nm, wherein the first LED is covered by the first photoluminescence material, and the second LED is covered by the first and second photoluminescence materials.