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:
Jan. 14, 2025
Filed:
Mar. 18, 2022
Seiko Epson Corporation, Tokyo, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A wavelength conversion element includes a substrate, reflection layer on the substrate, wavelength conversion layer in the reflection layer and converting a light in a first wavelength range into a light in a second wavelength range, structure in the wavelength conversion layer and scattering a part of the light in the first wavelength range, and optical layer in the structure, reflecting a part of the light in the first wavelength range, transmitting another part of the light in the first wavelength range, and transmitting the light in the second wavelength range. The structure includes a first structure portion, second structure portion, and planar portion between the first and second structure portions, the optical layers in the first and second structure portions have first reflectance for the light in the first wavelength range, and the optical layer in the planar portion has second reflectance.