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:
Dec. 03, 1991
Filed:
Feb. 22, 1990
Applicant:
Inventors:
Hitoshi Nakada, Saitama, JP;
Takeo Wakimoto, Saitama, JP;
Masanao Shinkai, Saitama, JP;
Daisaku Matsunaga, Tokyo, JP;
Assignees:
Pioneer Electronic Corporation, Tokyo, JP;
Nippon Kayaku Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
428457 ; 428690 ; 428917 ; 313504 ; 313507 ;
Abstract
Disclosed herein is an electroluminescent element which is constructed such that a fluorescent substance layer and a hole transport layer, both made of organic compounds and laminated on top of the other, are interposed between a cathode and an anode. The fluorescent substance layer is a thin film containing a bisstyryl derivative. It emits blue light efficiently at a high luminance upon application of a low voltage.