公开(公告)号：US11817531B1

公开(公告)日：2023-11-14

申请号：US18306780

申请日：2023-04-25

申请人： Bridgelux, Inc.

发明人： Yl-Qun Li ,  Jingqiong Zhang ,  Jungang Zhao

IPC分类号： H01L33/50 ,  H01L25/075 ,  C09K11/77 ,  C09K11/61 ,  C09K11/02

CPC分类号： H01L33/504 ,  C09K11/02 ,  C09K11/617 ,  C09K11/77342 ,  C09K11/77348 ,  H01L25/0753

摘要： A lighting device comprising: a first LED having a wavelength of maximum emission intensity from 620 nm to 640 nm; a second LED having a wavelength of maximum emission intensity from 500 nm to 565 nm; a third LED having a wavelength of maximum emission intensity from 430 nm to 480 nm; and a fourth LED for generating light comprising a CCT in a range from 1800K to 5000K. The first LED comprises a Phosphor-Converted LED comprising a first LED chip having a maximum emission intensity wavelength from 400 nm to 480 nm, and a narrowband red phosphor with a FWHM less than 55 nm. Light generated by the device comprises a combination of light generated by the first, second, third, and fourth LEDs and a CCT of light generated by the device is tunable by independently controlling power to the first, second, third, and fourth LEDs.