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:
Mar. 10, 2026
Filed:
Feb. 28, 2020
Sharp Kabushiki Kaisha, Sakai City, JP;
Hisayuki Utsumi, Sakai City, JP;
Masayuki Kanehiro, Sakai City, JP;
Yohei Nakanishi, Sakai City, JP;
SHARP KABUSHIKI KAISHA, Sakai City, JP;
Abstract
A display device has a display area in which there is provided a plurality of pixels and a frame area surrounding the display area. The display device includes, in the display area; a substrate; a thin film transistor layer; a light-emitting element layer including a plurality of light-emitting elements configured to emit light of mutually different colors; and a sealing layer in this order. The plurality of light-emitting elements include a cathode, an electron transport layer, a light-emitting layer, a hole transport layer, and an anode in this order from a substrate side. The electron transport layer includes oxide nanoparticles and a binder resin. On an electron transport layer side of the cathode, there is provided an undercoat layer in contact with the electron transport layer.