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 11700735 B1

Date of Patent:

Jul. 11, 2023

Filed:

Mar. 12, 2021

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 ...

H01L 51/50 (2006.01); H01L 51/52 (2006.01); H01L 27/32 (2006.01); H10K 50/11 (2023.01); H10K 50/15 (2023.01); H10K 50/16 (2023.01); H10K 50/19 (2023.01); H10K 50/13 (2023.01); H10K 59/32 (2023.01); H10K 101/40 (2023.01); H10K 85/30 (2023.01); H10K 85/60 (2023.01); H10K 101/30 (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

An organic light emitting display device is discussed, which includes an anode on a substrate, a first hole transfer layer on the anode, a first emission layer on the first hole transfer layer, a first electron transfer layer on the first emission layer, an N-type charge generation layer on the first electron transfer layer, a second hole transfer layer on the N-type charge generation layer, a first emission control layer on the second hole transfer layer, an absolute value of a highest occupied molecular orbital (HOMO) energy level of the first emission control layer being greater than an absolute value of a HOMO energy level of the second hole transfer layer, a second emission layer on the first emission control layer, a second electron transfer layer on the second emission layer and a cathode on the second electron transfer layer.

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