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 12161003 B1

Date of Patent:

Dec. 03, 2024

Filed:

May. 24, 2023

Organic light emitting display device having layer to control charge transfer

Applicant:

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

Inventor:

EunJung Park, Goyang-si, KR;

Assignee:

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

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Victoria K Hall

Int. Cl.

CPC ...

H10K 50/11 (2023.01); H10K 50/13 (2023.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 50/19 (2023.01); H10K 59/32 (2023.01); H10K 85/30 (2023.01); H10K 85/60 (2023.01); H10K 101/30 (2023.01); H10K 101/40 (2023.01);

U.S. Cl.

CPC ...

H10K 50/11 (2023.02); H10K 50/131 (2023.02); H10K 50/15 (2023.02); H10K 50/16 (2023.02); H10K 50/167 (2023.02); H10K 50/19 (2023.02); H10K 59/32 (2023.02); H10K 85/30 (2023.02); H10K 85/324 (2023.02); H10K 85/615 (2023.02); H10K 85/654 (2023.02); H10K 85/6572 (2023.02); H10K 2101/30 (2023.02); H10K 2101/40 (2023.02);

Abstract

Discussed is an organic light emitting display device including an anode, a first emission part on the anode, and including a first hole transfer layer, a first emission layer, and a first electron transfer layer, a second emission part on the first emission part, and including a second hole transfer layer, a second emission layer, and a second electron transfer layer, and a cathode on the second emission part. At least one among the first emission part and the second emission part can include an emission control layer having an absolute value of a HOMO energy level which is larger than an absolute value of a HOMO energy level of the first hole transfer layer or the second hole transfer layer. A hole mobility of the emission control layer is 1.0×10−1 cm2/Vs to 1.0×10−2 cm2/Vs lower than a hole mobility of the first hole transfer layer or the second hole transfer layer.

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