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. 20, 2022
Filed:
Jul. 20, 2021
Seiko Epson Corporation, Tokyo, JP;
Koichi Akiyama, Azumino, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
An illumination device includes a first light emitting element emitting first light in a first wavelength band, a wavelength conversion element converting a part of the first light into second light including a second wavelength band and a third wavelength band, diffusing another part of the first light, and emitting a result, a second light emitting element for emitting third light having the second wavelength band, a first optical element having a first area for reflecting the first light to enter the wavelength conversion element, reflecting fourth light having the second wavelength band out of the second light, and reflecting the third light, and a second area for transmitting the first light and the second light, and a second optical element for transmitting the first light to enter the first optical element, and reflecting the fourth light to enter the wavelength conversion element via the first area.