Patent ID: 7345319

Claim:
A light emitting device comprising: a light emitting element substrate; and a sealing resin portion which seals the light emitting element substrate, the sealing resin portion having a resin to which a fluorescent material having a refractive index n 1 and fine particles having a refractive index n 2 are added, the resin having a refractive index n 3 , wherein a relationship of n 2 >n 1 >n 3 holds in the refractive indexes n 1 to n 3 , a particle size of the fine particles is not more than 1/10 of a wavelength of light emitted from the light emitting element substrate and wherein a volume ratio “a” of the fine particles to the resin satisfies n 1 2 =a·n 2 2 +(1−a)·n 3 2 .