The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 09, 2012
Filed:
Mar. 31, 2008
Norihiro Itou, Suita, JP;
Takeyuki Yamaki, Ikoma-gun, JP;
Nobuhiro Ide, Katano, JP;
Kenji Kawano, Sakai, JP;
Norihiro Itou, Suita, JP;
Takeyuki Yamaki, Ikoma-gun, JP;
Nobuhiro Ide, Katano, JP;
Kenji Kawano, Sakai, JP;
Panasonic Corporation, Osaka, JP;
Abstract
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 Nf, and a refraction index of the other is assumed as Nf, a relationship that Nf>Nb>Nfis 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.