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:
Sep. 07, 2018
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventor:
Yoshitaka Itoh, Matsumoto, JP;
Assignee:
SEIKO EPSON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 26/08 (2006.01); G03B 21/20 (2006.01); G02B 26/00 (2006.01); G03B 21/16 (2006.01);
U.S. Cl.
CPC ...
G03B 21/204 (2013.01); G02B 26/008 (2013.01); G03B 21/16 (2013.01); G03B 21/208 (2013.01); G03B 21/2066 (2013.01);
Abstract
A wavelength conversion element includes: a wavelength conversion layer including a first surface on which excitation light is incident, and a second surface opposed to the first surface; a scattering layer provided to face the second surface, containing a plurality of particles, and at least scattering fluorescence obtained by wavelength-converting the excitation light by the wavelength conversion layer; and a reflective layer provided to face the scattering layer and reflecting the excitation light or the fluorescence. The particle diameter of the particle is smaller than the wavelength of the fluorescence.