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:
Dec. 29, 2020
Filed:
Feb. 09, 2018
Lumiotec Inc., Yonezawa, JP;
Junichi Tanaka, Yonezawa, JP;
LUMIOTEC INC., Yamagata, JP;
Abstract
An organic electroluminescent device wherein, among the distribution characteristics of light emitted inside a substrate: the brightness of white light has a maximum value within an angle range of 20-60° from an axis perpendicular to the planar direction of the substrate; the spectral radiance of red light at the maximum emission wavelength and the spectral radiance of green light at the maximum emission wavelength have maximum values within the angle range of 30-70° from the axis perpendicular to the planar direction of the substrate; and the maximum values are greater than the value for spectral radiance of red light at the maximum emission wavelength and the value for the spectral radiance of green light at the maximum emission wavelength, in the axial direction perpendicular to the planar direction of the substrate.