Patent ID: 9194545
Filing Date: 2015-11-24
Classification: G02B,H01L

Abstract:
1. A light-emitting device comprising: an emission layer; a diffraction grating structure including a diffraction grating; and a diffusion layer having a structure for diffusing light which is transmitted from one face to another face, wherein light going out from the emission layer has a central wavelength λ; the diffraction grating has a period p which is not less than 1.0λ and not more than 3.5λ; the diffusion layer has a haze of 80% or more and a total light transmittance of 80% or less; and a maximum amount of change Δu′v′ of (u′v′) of the CIE colorimetric system with respect to an angle of viewing is 0.005 or less.