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:
Jan. 15, 2013
Filed:
Dec. 31, 2008
Tsutomu Nakanishi, Tokyo, JP;
Akira Fujimoto, Kawasaki, JP;
Shigeru Matake, Yokohama, JP;
Koji Asakawa, Kawasaki, JP;
Tsutomu Nakanishi, Tokyo, JP;
Akira Fujimoto, Kawasaki, JP;
Shigeru Matake, Yokohama, JP;
Koji Asakawa, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
The present invention provides a highly efficient light-extraction layer and an organic electroluminescence element excellent in light-extraction efficiency. The light-extraction layer of the present invention comprises a reflecting layer and a three-dimensional diffraction layer formed thereon. The diffraction layer comprises fine particles having a variation coefficient of the particle diameter of 10% or less and of a matrix having a refractive index different from that of the fine particles. The particles have a volume fraction of 50% or more based on the volume of the diffraction layer. The particles are arranged to form first areas having short-distance periodicity, and the first areas are disposed and adjacent to each other in random directions to form second areas. The organic electroluminescence element of the present invention comprises the above light-extraction layer.