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US 12,674,559 B2Granted
Solid-state grow-lights for plant cultivation
AssigneeBridgelux, Inc.
InventorsYi-Qun Li, Jing Qiong Zhang
Life of this patent
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Abstract
There is provided a light emitting device for plant cultivation comprising: a broadband blue solid-state light source for generating broadband blue light with a maximum emission wavelength from 420 nm to 495 nm; wherein broadband blue solid-state light source generates blue light from 400 nm to 520 nm having an intensity wavelength spectrum which over a wavelength of at least 40 nm has an intensity that varies by less than 25%, less than 15%, or less than 10%; or from 430 nm to 470 nm or from 450 nm to 465 nm has an intensity that varies by less than 10%.
Claims12
A light emitting device comprising:
- a broadband blue solid-state light source for generating broadband blue light with an emission wavelength from 420 nm to 495 nm;
- wherein the broadband blue solid-state light source comprises a InGaN/GaN multiple quantum well LED chip comprising multiple different wavelength quantum wells in its active region for generating multiple narrowband blue to cyan light emissions of different wavelengths and wherein the broadband blue solid-state light source is for generating light having an emission maxima with an intensity which varies less than 15% over a wavelength range of at least 40 nm.
Dependencies are inferred from the claim text.