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:
Sep. 03, 2024
Filed:
Mar. 25, 2022
Seiko Epson Corporation, Tokyo, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A projection optical device includes an incident side optical path on which image light is made incident from a image generation device, a bending member configured to bend the image light having passed through the incident side optical path, an emission side optical path on which the image light bent by the bending member is made incident, the emission side optical path being disposed side by side with the light source device, and a reflection element provided on the emission side optical path and configured to reflect the image light made incident thereon and project the image light to the outside of the exterior housing. The absolute value of f2/f1 satisfies the following expression when a focal length of the projection optical device is represented as f1 and a focal length of the reflection element is represented as f2. 4.0<|f2/f1|<20.0.