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:
Oct. 22, 2019
Filed:
Jul. 30, 2018
Seiko Epson Corporation, Tokyo, JP;
Shunji Kamijima, Suwa-gun, JP;
Wataru Yasumatsu, Azumino, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A light source device includes a light emitting element adapted to emit light having a first polarization direction and a first wavelength, a polarization separation element adapted to transmit either one of the light having the first polarization direction and the first wavelength and light having a second polarization direction and the first wavelength, and reflect the other, and transmit or reflect light having a second wavelength to emit the light having the second wavelength toward a same direction as a direction in which the light having the second polarization direction and the first wavelength is emitted, a wavelength conversion element adapted to convert the light having the first wavelength into the light having the second wavelength, and a diffusion optical system disposed on a light path between the polarization separation element and the wavelength conversion element. The diffusion optical system includes a diffusion section and a light separation section.