LIGHT EMITTING DEVICE, LIGHT SOURCE FOR ILLUMINATION, AND ILLUMINATION APPARATUS

摘要

A light emitting device that emits white light includes first and second light emitting elements which have different emission peak wavelengths within a range of 440 nm to 495 nm. The device also includes a wavelength conversion material which converts a wavelength of light emitted by at least one of the first and second light emitting elements. The white light has an emission spectrum peaked at a first peak wavelength and a second peak wavelength. The first peak wavelength corresponds to the emission peak wavelength of the first light emitting element, and the second peak wavelength corresponds to the emission peak wavelength of the second light emitting element. Where a light intensity at one of the first peak wavelength and the second peak wavelength is 1, a light intensity at a bottom of a valley between the first and second peak wavelengths is 0.5 or higher but lower than 1.0.

主权项

1. A light emitting device that emits white light, the light emitting device comprising:
a first light emitting element and a second light emitting element which have different emission peak wavelengths within a range of 440 nm to 495 nm; and a wavelength conversion material which converts a wavelength of light emitted by at least one of the first light emitting element and the second light emitting element, wherein the white light has an emission spectrum peaked at a first peak wavelength and a second peak wavelength, the first peak wavelength corresponding to the emission peak wavelength of the first light emitting element, and the second peak wavelength corresponding to the emission peak wavelength of the second light emitting element, and where a light intensity at one of the first peak wavelength and the second peak wavelength is 1, a light intensity at a bottom of a valley between the first peak wavelength and the second peak wavelength is 0.5 or higher but lower than 1.0.