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. 04, 2016
Filed:
Sep. 26, 2013
Panasonic Corporation, Osaka, JP;
Yasuhisa Inada, Osaka, JP;
Taku Hirasawa, Kyoto, JP;
Shinichi Wakabayashi, Osaka, JP;
Masahito Yamana, Hyogo, JP;
Abstract
An organic EL device includes: a reflective electrode; a transparent electrode opposite the reflective electrode; an organic layer including a light-emitting layer between the reflective electrode and transparent electrode; and a low refractive index layer between the reflective electrode and light-emitting layer. The low refractive index layer has a function of transporting/injecting electrons/holes, and has a lower refractive index than the light-emitting layer. Distance between the surface of the reflective electrode and a central light-emitting position of the light-emitting layer is 300 nm or less. Furthermore, Δn×d/λ≦−0.009 and Δn×d/λ≦−0.02 are satisfied when the reflective electrode comprises Al and Ag, respectively, where: λ denotes the central light-emitting wavelength of light generated in the light-emitting layer; Δn denotes the refractive index difference between the low refractive index layer and the light-emitting layer, with the refractive index of the light-emitting layer as reference; and d denotes the thickness of the low refractive index layer.