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. 13, 2018
Filed:
Oct. 24, 2017
Japan Display Inc., Minato-ku, JP;
Koji Yasukawa, Minato-ku, JP;
Japan Display Inc., Minato-ku, JP;
Abstract
A display device includes an anode, a hole injection layer, a hole transport layer, a blue light emitting layer, a hole blocking layer, an electron transport layer and/or an electron injection layer, and a cathode, which are stacked in this order, and has the following characteristics (i), (ii), and (iii): (i) the hole mobility of the blue light emitting layer≥the electron mobility of the blue light emitting layer, (ii) the hole mobility of the hole transport layer≥the electron mobility of the blue light emitting layer, and (iii) |the HOMO value of the blue light emitting layer−the HOMO value of the hole blocking layer|≥0.4 eV.