Patent ID: 9166112
Filing Date: 2015-10-20
Classification: F21S,H01L

Abstract:
1. A light emitting module comprising: a light emitting element configured to emit a light having a main wavelength within a certain range; a light wavelength conversion member configured to convert the wavelength of the light emitted by the light emitting element then emit the light; and an optical filter configured to transmit a light with the main wavelength emitted by the light emitting element and reflect a light with a main wavelength which has been converted by the light wavelength conversion member, wherein the light wavelength conversion member is formed into a plate shape, wherein the optical filter is provided on the surface of the light wavelength conversion member and between the light wavelength conversion member and the light emitting element, and wherein the optical filter has a higher transmittance than a reflectance with respect to the light having a wavelength within a predetermined overlapping wavelength range where the wavelength range of the light emitted by the light emitting element and that of the light converted by the light wavelength conversion member are overlapped with each other, and the maximum incident angle for transmission is 45 degrees or more and less than 90 degrees.