Light source device including a high energy light source and a wavelength conversion member, illuminating device comprising the same, and vehicle

摘要

A light source device is provided. The light source device comprises a semiconductor light-emitting element; and a wavelength conversion member for converting a wavelength of a light emitted from the semiconductor light-emitting element. The semiconductor light-emitting element has a light-emitting peak wavelength of not less than 380 nanometers and not more than 420 nanometers. The light emitted from the semiconductor light-emitting element has a light energy density of not less than 0.2 kW/cm2. The wavelength conversion member contains at least one fluorescent substance selected from the group consisting of a (Sr1-x,Bax)3MgSi2O8:Eu2+ (0≦x≦1) fluorescent substance, a (Y1-y,Gdy)3(Al1-z,Gaz)5O12:Ce3+ (0≦y≦1, 0≦z≦1) fluorescent substance, and an Eu3+-activated fluorescent substance. The light source device has a high output and a high light-emitting efficiency.

主权项

1. A light source device comprising:
a semiconductor light-emitting element; and a wavelength conversion member for converting a wavelength of a light emitted from the semiconductor light-emitting element into a longer wavelength, wherein: the semiconductor light-emitting element has a light-emitting peak wavelength of not less than 380 nanometers and not more than 420 nanometers, the light emitted from the semiconductor light-emitting element has a light energy density of not less than 0.2 kW/cm2, the wavelength conversion member includes a blue fluorescent substance, a green fluorescent substance, and a red fluorescent substance, the blue fluorescent substance includes a (Sr1-x,Bax)3MgSi2O8:Eu2+ (0≦x≦1) fluorescent substance, the green fluorescent substance includes a (Y1-y,Gdy)3(Al1-z,Gaz)5O12:Ce3+ (0≦y<1, 0≦z<1) fluorescent substance, and the red fluorescent substance includes at least one selected from the group consisting of a LiLaW2O8:Eu3+ fluorescent substance, a Ca2W2O8:Eu3+ fluorescent substance, and a LiGdW2O8:Eu3+ fluorescent substance.