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. 30, 1996
Filed:
Sep. 20, 1994
Applicant:
Inventors:
Yasuhiro Shirota, Toyonaka, JP;
Hiroshi Inada, Kobe, JP;
Yoshinobu Yonemoto, Tsurugashima, JP;
Takeo Wakimoto, Tsurugashima, JP;
Kunio Imai, Tsurugashima, JP;
Assignees:
Pioneer Electronic Corporation, Tokyo, JP;
Bando Chemical Industries, Ltd., Kobe, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ; H01J / ;
U.S. Cl.
CPC ...
428690 ; 428917 ; 313503 ; 313504 ; 313505 ; 313506 ; 313507 ; 313508 ; 313509 ;
Abstract
An organic electroluminescent device comprises an organic emitting layer and a hole transport layer laminated with each other and arranged between a cathode and an anode, in characterized in that the hole transport layer made of the triphenylbenzene derivative. This hole transport layer has the high heart-resistant property and high conductivity to improve the durability and thus this device emits light at a high luminance and a high efficiency upon application of a low voltage.