Patent ID: 8283845

Claim:
A plane emission device comprising a transparent substrate, a light scattering layer provided on a surface of the transparent substrate, and a luminescent body layer of organic or inorganic material, which is provided on a surface of the light scattering layer and emits light by light or electric energy, the light scattering layer comprising: a binder and two kinds of fillers, where Nb represents a refraction index of the binder, Nf 1 represents, a refraction index of one of the two kinds of fillers and Nf 2 represents a refraction index of the other one of the two kinds of fillers, a relationship Nf 2 >Nb>Nf 1 is satisfied; and wherein a haze value of the light scattering layer is in a range from 2 to 50, the haze value being a ratio of a diffuse transmittance rate to a full transmittance rate multiplied by 100; and mean particle diameters of the two kinds of fillers are respectively in a range from 5 to 200 nm.