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:
Jan. 14, 2025
Filed:
Feb. 09, 2022
Koito Manufacturing Co., Ltd., Tokyo, JP;
Yoichi Ogata, Shizuoka, JP;
KOITO MANUFACTURING CO., LTD., Tokyo, JP;
Abstract
An image projection apparatus includes a first image irradiation unit, a light guide plate unit, and a diffraction grating unit. The first image irradiation unit is configured to emit first light. The light guide plate unit includes a first light incidence unit, an optical waveguide unit, and a first light emission unit. The first light incidence unit on which the first light is incident. The optical waveguide unit is configured to guide a part of the first light as guided light while totally reflecting the part of the first light. The first light emission unit is configured to emit a part of the guided light in a viewpoint direction. The diffraction grating unit is provided in the first light incidence unit. The first light emission unit includes a beam splitter provided in the optical waveguide unit and a retroreflection unit provided at an end of the optical waveguide unit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile