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. 28, 2009
Filed:
Jan. 25, 2005
Sang-hoon Park, Seongnam-si, KR;
Tae-yong Noh, Gunpo-si, KR;
Sang-yeol Kim, Gwacheon-si, KR;
Lyong-sun Pu, Suwon-si, KR;
Soo-hyoung Lee, Suwon-si, KR;
In-nam Kang, Suwon-si, KR;
Jhun-mo Son, Yongin-si, KR;
Sang-Hoon Park, Seongnam-si, KR;
Tae-Yong Noh, Gunpo-si, KR;
Sang-Yeol Kim, Gwacheon-si, KR;
Lyong-Sun Pu, Suwon-si, KR;
Soo-Hyoung Lee, Suwon-si, KR;
In-Nam Kang, Suwon-si, KR;
Jhun-Mo Son, Yongin-si, KR;
Samsung Mobile Display Co., Ltd., Suwon-si, Gyeonggi-do, KR;
Abstract
A spirofluorene-based polymer which contains a spirofluorene structure as a basic unit and which is end-capped with functional moieties substituted by fluorine, and an organic electroluminescent device using an organic layer using the spirofluorene-based polymer. The organic electroluminescent device has improved efficiency, reduced driving voltage, and excellent thermal, optical and electrical stability.