| CPC H01L 33/504 (2013.01) | 15 Claims |
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1. A white light emitting device comprising:
a blue light emitting diode configured to emit blue light having a peak wavelength in a first range of 440 nm to 455 nm;
a first wavelength conversion material that, based on being excited by the blue light having the peak wavelength in the first range of 440 nm to 455 nm, emits first light having a peak wavelength in a second range of 535 nm to 550 nm and a full width at half maximum (FWHM) of 60 nm or less; and
a second wavelength conversion material that, based on being excited by the blue light having the peak wavelength in the first range of 440 nm to 455 nm, emits second light having a peak wavelength in a third range of 620 nm to 660 nm,
wherein a melanopic photopic ratio of white light emitted from the white light emitting device is 0.65 or less, and a color rendering index (CRI) of the white light is 80 or more, and
wherein a correlated color temperature (CCT) of the white light is in a range of 1800 K to 4200 K
wherein the melanopic photopic ratio of the white light is in a range of 0.1 to 0.65, and
wherein, in a spectrum of the white light, an integral value in a band of 440 nm to 460 nm is in a range of 50% to 65% of an integral value in a band of 380 nm to 500 nm.
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