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:
Apr. 02, 1996
Filed:
Mar. 29, 1994
Masahide Matsuura, Sodegaura, JP;
Hiroshi Tokailin, Sodegaura, JP;
Hisahiro Higashi, Sodegaura, JP;
Tadashi Kusumoto, Sodegaura, JP;
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Abstract
An organic electroluminescence device comprises the first light emitting layer containing an organic compound having a fluorescence peak wave length of 380 nm or longer to shorter than 480 nm in solid state and the second light emitting layer containing an organic compound having a fluorescence peak wave length of 480 nm or longer to shorter than 580 nm in solid state. One of the first light emitting layer and the second light emitting layer contains an organic compound having a fluorescence peak wave length of 580 nm or longer to 650 nm or shorter in solution state. The device has a structure in which the first light emitting layer and the second light emitting layer are laminated on the anode in this order and both of these layers emit light by application of an electric field. This device shows light emission, particularly white light emission, with high efficiency and excellent stability.