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:
Jun. 16, 2026
Filed:
Jan. 25, 2024
Seiko Epson Corporation, Tokyo, JP;
Hiroaki Miya, Matsumoto, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
An illumination apparatus includes a light source device configured to a light containing a first color light, a second color light, and a third color, and a polarization converter converting a first polarized light of the light emitted from the light source device into a second polarized light, wherein the polarization converter has a polarization separation part separating the light emitted from the light source device into the first polarized light and the second polarized light, and a wave plate converting the first polarized light into the second polarized light, 80% or more of the first color light output from the light source device is the second polarized light, and a wavelength at which polarization rotation efficiency of the wave plate is the highest is longer than a peak wavelength of the second color light and shorter than a peak wavelength of the third color light.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile