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:
Jan. 27, 2026
Filed:
Nov. 03, 2021
Samsung Display Co., Ltd., Yongin-si, KR;
Jongseok Han, Yongin-si, KR;
Illsoo Park, Yongin-si, KR;
Jaehong Kim, Yongin-si, KR;
Hyomin Kim, Yongin-si, KR;
Sijin Sung, Yongin-si, KR;
Heeseong Jeong, Yongin-si, KR;
Samsung Display Co., Ltd., Yongin-si, KR;
Abstract
A display apparatus includes a substrate, a first electrode on the substrate, a second electrode on the first electrode, an emission layer between the first electrode and the second electrode, and a hole transport layer located between the first electrode and the emission layer, and including a first mixed layer in which a first material and a second material different from the first material are mixed with each other, wherein an absolute value of a difference between a Highest Occupied Molecular Orbital (HOMO) energy level of the first material and a HOMO energy level of the second material is about 0.3 eV or less.