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. 17, 2025
Filed:
Jul. 15, 2022
Canon Kabushiki Kaisha, Tokyo, JP;
Norifumi Kajimoto, Zama, JP;
Takayuki Ito, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An organic device comprising a reflective electrode, an organic layer arranged on the reflective electrode, a semi-transmissive electrode arranged on the organic layer and a reflection surface formed above the semi-transmissive electrode is provided. The organic layer emits white light and includes a blue-emitting layer. An optical distance L of the organic layer satisfies L≥[{(ϕr+ϕs)/π}×(λb/4)]×1.2, where λb is a peak wavelength of the blue-emitting layer, ϕr and ϕs are a phase shift of the wavelength λb in the reflective electrode and the semi-transmissive electrode, respectively. A resonant wavelength of an optical distance between the semi-transmissive electrode and the reflection surface is shorter than the wavelength λb.