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:
Apr. 28, 2020
Filed:
Jul. 21, 2017
Nippon Electric Glass Co., Ltd., Otsu-shi, Shiga, JP;
NIPPON ELECTRIC GLASS CO., LTD., Shiga, JP;
Abstract
Provided is a wavelength conversion member that can be adjusted in chromaticity with high accuracy and a production method therefor. A wavelength conversion memberhaving a first principal surfaceand a second principal surfaceopposed to each other includes a glass matrixand phosphor particlesdisposed in the glass matrix, wherein concentrations of the phosphor particlesin the first principal surfaceand in the second principal surfaceare lower than concentrations of the phosphor particlesin surface layer bottom planesandlocated 20 μm inward from the first principal surfaceand 20 μm inward from the second principal surface, respectively.