COMPOSITE WAVELENGTH CONVERSION POWDER, RESIN COMPOSITION CONTAINING COMPOSITE WAVELENGTH CONVERSION POWDER, AND LIGHT EMITTING DEVICE

摘要

A composite wavelength conversion powder and a resin composition containing a composite wavelength conversion powder which have high utilization efficiency of light and high utilization efficiency of a constituent material, and are able to make highly efficient light emission and high reliability compatible are provided. The composite wavelength conversion powder is formed by dispersing phosphor particles having a refractive index of 1.6 or more in matrix particles containing fine magnesium fluoride particles or fine calcium fluoride particles.;In addition, a light emitting device which is able to improve utilization efficiency of light due to the phosphor particles excited by primary irradiation light emitted by a light emitting element, is able to improve the optical output of light emission by increasing an the amount of secondary irradiation light generated from the phosphor particles, and is able to suppress limit the occurrence of color unevenness or a color variation device in light emitted to the outside of the device is provided. A light emitting device (1) includes a substrate (2), a light emitting element (3) mounted on a front surface of the substrate (2), and a light transmitting member (4) formed to cover the light emitting element (3), and the light transmitting member (4) contains phosphor particles having an average particle diameter of 500 nm or less, and composite wavelength conversion particles (12) formed of inorganic particles having an average particle diameter of 500 nm or less which are transparent with respect to visible light.

主权项

1. A composite wavelength conversion powder comprising matrix particles containing fine magnesium fluoride particles or fine calcium fluoride particles, and phosphor particles having a refractive index of 1.6 or more dispersed in the matrix particles.