Patent ID: 9732940
Date: 2017-08-15
CPC Classifications: F21K,F21V,F21Y

Claim:
1. A lighting apparatus, comprising: a light emitting diode element for emitting a first light with a wavelength λ1 along a lighting path; a wavelength converting apparatus disposed on the lighting path, wherein the wavelength converting apparatus comprises a hollow tube and a wavelength converting material, the hollow tube has an accommodating chamber, and the wavelength converting material is positioned in the accommodating chamber, wherein a portion of the first light is converted to be a second light with a wavelength λ2 after the portion of the first light goes through the wavelength converting material in the wavelength converting apparatus, wherein the first light and the second light are mixed to be a third light with a wavelength range covering the wavelength λ1 and the wavelength λ2; and a light diffusing plate, wherein the wavelength converting apparatus is positioned between the light diffusing plate and the light emitting diode element.