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:
Nov. 18, 2025
Filed:
May. 12, 2023
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Takanori Yogo, Kyoto, JP;
Michihiro Okuda, Osaka, JP;
PANASONIC PROJECTOR & DISPLAY CORPORATION, Osaka, JP;
Abstract
A light source device includes: a first light source that emits light of first linear polarization; a half mirror that separates emitted light from the first light source into first light traveling to a first optical path and second light traveling to a second optical path; a polarized light combination mirror that combines the first light and the second light; an optical path change element that is disposed on the second optical path and reflects the second light and guides the second light to the polarized light combination mirror; and a retardation plate that is disposed on the second optical path and converts the second light into second linear polarization inclined with respect to the first linear polarization. The optical path change element is disposed such that point images of the first light and point images of the second light on the polarized light combination mirror are alternately arranged.