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US 8,283,845 B2Granted
Plane emission device
AssigneePanasonic Corporation
InventorsNorihiro Itou, Takeyuki Yamaki, Nobuhiro Ide, Kenji Kawano
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AssigneePanasonic Corporation
InventorsNorihiro Itou, Takeyuki Yamaki, Nobuhiro Ide, Kenji Kawano
Estimating the term…
In a plane emission device comprising a transparent substrate, a light scattering layer formed on a surface of the transparent substrate, and a luminescent body of organic or inorganic material which is formed on a surface of the light scattering layer and emits light by light or electric energy, efficiency to takeout light to outside is improved. The light scattering layer contains binder and two kinds of fillers, and when a refraction index of the binder is assumed as Nb, a refraction index of one of the two kinds of fillers is assumed as Nf1, and a refraction index of the other is assumed as Nf2, a relationship that Nf2>Nb>Nf1 is satisfied. Since the light scattering layer contains two kinds of fillers, disorder occurs in critical angle when light exits from the light scattering layer to the transparent substrate, incidence rate of light into the transparent substrate rises, and efficiency to takeout the light to outside increases.
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:
Dependencies are inferred from the claim text.