US Patent No. 10,219,345

TUNABLE LED EMITTER WITH CONTINUOUS SPECTRUM


Patent No. 10,219,345
Issue Date February 26, 2019
Title Tunable Led Emitter With Continuous Spectrum
Inventorship Xiantao Yan, Palo Alto, CA (US)
Kachun Lee, Fremont, CA (US)
Shifan Cheng, Milpitas, CA (US)
Julio Cesar Alvarado, East Palo Alto, CA (US)
Assignee LedEngin, Inc., San Jose, CA (US)

Claim of US Patent No. 10,219,345

1. A light-emitting device comprising:a substrate;
a plurality of LED chips disposed on the substrate, the LED chips including LED chips of at least four different colors; and
a plurality of electrical paths disposed in part on the substrate and in part within the substrate, the electrical paths connecting the LED chips into at least three independently addressable groups, the number of independently addressable groups being less than the number of different colors of the LED chips, wherein each LED chip belongs to only one of the independently addressable groups,
wherein different ones of the independently addressable groups of LEDs produce different colors of light and wherein at least a first one of the independently addressable groups of LEDs includes a first LED chip of a first color and a second LED chip of a second color different from the first color, wherein the first LED chip is a monochromatic LED chip and the second LED chip is a phosphor-converted LED chip that produces broad spectrum light having a full width at half maximum intensity (FWHM) of at least 100 nm.