Patent ID: 9574721
Date: 2017-02-21
CPC Classifications: F21K,F21V,F21Y,H01L

Claim:
1. A white light emitting device, comprising: a substrate; a plurality of first light emitting diode (LED) chips, each emitting light of a dominant wavelength in a range from 440 nm to 480 nm, the first LED chips being mounted on and electrically connected to the substrate, and a difference between the dominant wavelengths of at least two first LED chips being greater than or equal to 5 nm; a plurality of second LED chips, each emitting light of a dominant wavelength in a range from 600 nm to 760 nm, the second LED chips being mounted on and electrically connected to the substrate, and a difference between the dominant wavelengths of at least two second LED chips being greater than or equal to 5 nm; a plurality of third LED chips electrically connected to the substrate, wherein each of the third LED chips emits light of a dominant wavelength in a range from 500 nm to 560 nm; and a fluorescent layer, disposed on the substrate, converting a portion of light of the first LED chips to generate a fluorescent light.