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:
Nov. 19, 2019
Filed:
Jul. 27, 2018
Applicant:
Japan Display Inc., Tokyo, JP;
Inventor:
Koji Yasukawa, Tokyo, JP;
Assignee:
Japan Display Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 29/08 (2006.01); H01L 51/50 (2006.01); H01L 51/00 (2006.01); H01L 51/52 (2006.01); H01L 27/32 (2006.01);
U.S. Cl.
CPC ...
H01L 51/5088 (2013.01); H01L 51/0097 (2013.01); H01L 51/5056 (2013.01); H01L 51/524 (2013.01); H01L 27/3244 (2013.01); H01L 51/5012 (2013.01); H01L 51/5096 (2013.01); H01L 51/5206 (2013.01); H01L 51/5221 (2013.01); H01L 51/5281 (2013.01); H01L 2251/301 (2013.01); H01L 2251/308 (2013.01); H01L 2251/5338 (2013.01); H01L 2251/552 (2013.01); H01L 2251/558 (2013.01);
Abstract
A display device including a pixel electrode, a counter electrode, and an organic layer arranged between the pixel electrode and the counter electrode, wherein the organic layer includes a hole injection layer in contact with the pixel electrode, a hole transport layer above the hole injection layer, a light emitting layer and an electron transport layer, the hole injection layer includes an inorganic material, and the inorganic material has a work function of 4.4 eV or less and includes one element or a plurality of elements selected from Na, Mg, K, Rb, Sr, Cs, Ba, Fr, Ca, Yb, Li, Al, Sm, Er and Ho, or a fluoride or an oxide of the elements.