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. 16, 2014
Filed:
Apr. 05, 2013
Lg Display Co., Ltd., Seoul, KR;
Sung-Hoon Pieh, Seoul, KR;
Chang-Wook Han, Seoul, KR;
Hong-Seok Choi, Seoul, KR;
Ki-Woog Song, Gyeonggi-do, KR;
Hyung-June Kim, Gyeonggi-do, KR;
LG Display Co., Ltd., Seoul, KR;
Abstract
A tandem white organic light emitting device having high efficiency and long lifespan by adjusting characteristics of a hole transport layer adjacent to a charge generation layer consisting of p-type and n-type charge generation layer is disclosed, the p-type charge generation layer is formed of organic materials only, and at least one organic material contained in the p-type charge generation layer has a LUMO level of −6.0 eV to −4.5 eV.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile