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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.:

US 10950812 B1

PDFFull Text
Date of Patent:
Mar. 16, 2021

Filed:

Jun. 24, 2016

Organic light emitting display device (oled) having p-type charge generation layer (cgl) formed between emissions stack

Applicant:

Lg Display Co., Ltd., Seoul, KR;

Inventors:

Yoondeok Han, Seoul, KR;

JaeMan Lee, Seoul, KR;

SoYeon Ahn, Seoul, KR;

Heedong Choi, Uiwang, KR;

JungSoo Park, Seoul, KR;

Assignee:

LG DISPLAY CO., LTD., Seoul, KR;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Anh D Mai

Int. Cl.
CPC ...
H01L 51/50 (2006.01); H01L 27/32 (2006.01); H01L 51/52 (2006.01);
U.S. Cl.
CPC ...
H01L 51/5004 (2013.01); H01L 27/322 (2013.01); H01L 27/3209 (2013.01); H01L 27/3246 (2013.01); H01L 27/3248 (2013.01); H01L 51/504 (2013.01); H01L 51/506 (2013.01); H01L 51/5016 (2013.01); H01L 51/5044 (2013.01); H01L 51/5056 (2013.01); H01L 51/5072 (2013.01); H01L 51/5088 (2013.01); H01L 51/5278 (2013.01); H01L 2251/552 (2013.01); H01L 2251/558 (2013.01);
Abstract

Discussed is an organic light emitting display device. The organic light emitting display device can include a first emission part, a second emission part on the first emission part, and a first P-type charge generation layer between the first emission part and the second emission part. The first emission part includes a first hole transport layer, a first emission layer, and a first electron transport layer. The second emission part includes a second hole transport layer, a second emission layer, and a second electron transport layer. The second hole transport layer and the first P-type charge generation layer are disposed adjacent to each other. The second hole transport layer includes a first material and a second material. The first material has an absolute value of a HOMO energy level which can be greater than an absolute value of a LUMO energy level of the first P-type charge generation layer.

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