Patent ID: 9644825
Date: 2017-05-09
CPC Classifications: F21K,F21V,F21Y,H05B

Claim:
1. A lighting device comprising: a light source which includes a blue light emitting device emitting blue light in a visible light spectrum, and a red light emitting device emitting red light; an optical exciter which is disposed on the light source, is spaced apart from the blue light emitting device and the red light emitting device, and includes at least one phosphor; and a power supply unit which is electrically connected to the light source and controls on/off of the blue light emitting device and the red light emitting device, wherein when the blue light emitting device is an on-state and the red light emitting device is an off-state by the power supply unit, light emitted from the optical exciter is disposed within a specific area on a CIE 1931 chromaticity diagram, wherein the specific area is formed by connecting three color coordinates, and the three color coordinates are (0.32, 0.4), (0.36, 0.5) and (0.368, 0.49), wherein when the blue light emitting device and the red light emitting device are an on-state, the light emitted from the optical exciter is disposed within a predetermined target color coordinate range on the CIE 1931 chromaticity diagram, and wherein the blue light emitting device has a dominant wavelength of from 430 nm to 480 nm and the second light emitting device has a dominant wavelength of from 600 nm to 650 nm.