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:
Sep. 17, 2024
Filed:
Apr. 13, 2020
Wuhan Tianma Micro-electronics Co., Ltd., Wuhan, CN;
Wenpeng Dai, Shanghai, CN;
Jinghua Niu, Shanghai, CN;
Wei Gao, Shanghai, CN;
Lei Zhang, Shanghai, CN;
Gaojun Huang, Shanghai, CN;
WuHan TianMa Micro-electronics CO., LTD., Wuhan, CN;
Abstract
Provided are a nitrogen-heterocyclic compound, a display panel and a display apparatus. In an embodiment, the compound has a structure of Chemical Formula 1, in which Xand Xare each C or N, and at least one of Xand Xis N; Xto Xare N or —CR, and one, two, three or four of Xto Xare N, where Ris hydrogen, deuterium, a substituted or unsubstituted C1-C20 alkyl, C1-C20 alkoxy, C1-C20 thioalkyl, C6-C30 aryl, or C3-C30 heteroaryl; and Ris independently present or forms an aliphatic ring, an aromatic ring, or a heteroaromatic ring with adjacent carbon atoms; Arand Arare each C6-C30 aryl or C3-C30 heteroaryl; and Land Lare each a single bond, C6-C30 arylene, or C3-C30 heteroarylene. The compound is suitable as a CPL material to improve external quantum efficiency (EQE) of an organic light-emitting device and light-emitting efficiency.