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:
Aug. 23, 2016
Filed:
Sep. 11, 2013
Lg Display Co., Ltd., Seoul, KR;
Shin-Han Kim, Gyeonggi-do, KR;
Hwa-Kyung Kim, Seoul, KR;
Hong-Seok Choi, Seoul, KR;
Gwi-Jeong Cho, Daegu, KR;
Youn-Seok Kam, Seoul, KR;
Mi-Young Han, Gyeonggi-do, KR;
Hye-Min Oh, Seoul, KR;
Tae-Shick Kim, Gyeonggi-do, KR;
Seong-Su Jeon, Gyeonggi-do, KR;
Chi-Yul Song, Incheon, KR;
LG Display Co., Ltd., Seoul, KR;
Abstract
Disclosed is an organic light emitting display device with an enhanced light emission efficiency at high current and an enhancement in panel efficiency through prevention of a roll-off phenomenon. The organic light emitting display device includes first and second electrodes formed on a substrate facing each other. A hole injection layer, a hole transport layer, at least first and second light emitting layers, and an electron transport layer are sequentially stacked between the first and second electrodes. The first light emitting layer includes different hosts while being doped with the same dopant in different dosages. The first light emitting layer includes a first host and a second host, and the second light emitting layer includes the first host and a third host different from the second host. The first and second light emitting layers are doped with the same phosphorescent yellow-phosphorescent green dopant in the same dosage.