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:
Jun. 16, 2026
Filed:
Aug. 06, 2021
Beijing Boe Technology Development Co., Ltd., Beijing, CN;
Boe Technology Group Co., Ltd., Beijing, CN;
Wenhai Mei, Beijing, CN;
Zhigao Lu, Beijing, CN;
Beijing BOE Technology Development Co., Ltd., Beijing, CN;
Abstract
The present disclosure discloses a quantum dot light emitting device, a preparation method therefor and a display apparatus. In the present disclosure, at least one of one or more layers of light emitting functional layers is disposed to include at least two sub-function layers, the sub-function layers comprise ligands, and surface energies of the ligands corresponding to sub-function layers change in gradient along a transmission direction of carriers in the sub-function layers, so that energy levels of the sub-function layers change in gradient. In this way, the energy levels of the sub-function layers can be matched with the energy levels of the adjacent light emitting function layers, so that carrier transmission and balance as well as device efficiency can be improved.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile