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:
Sep. 24, 2013
Filed:
Jan. 21, 2009
Toshio Hama, Yokosuka, JP;
Masaru Nagai, Nagano, JP;
Chong LI, Matsumoto, JP;
Koji Kawaguchi, Matsumoto, JP;
Yuko Nakamata, Matsumoto, JP;
Naoyuki Kanai, Matsumoto, JP;
Toshio Hama, Yokosuka, JP;
Masaru Nagai, Nagano, JP;
Chong Li, Matsumoto, JP;
Koji Kawaguchi, Matsumoto, JP;
Yuko Nakamata, Matsumoto, JP;
Naoyuki Kanai, Matsumoto, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A color conversion film is disclosed that absorbs light from an organic electroluminescent part emitting blue-green light and converts the light to visible light at a longer wavelength. The color conversion film includes two different dyes. A first dye is a polymer dye with an average molecular weight of 1000 to 1,000,000 that absorbs light incident on the color conversion film and transfers the energy of the light to a second dye. The second dye is a dye that receives the energy from the first dye and emits light. With a multicolor-emitting, organic electroluminescent device including the color conversion film, it is possible to achieve excellent conversion efficiency without increasing the thickness of the color conversion film as in a conventional device using a binder resin.