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:
May. 01, 2018
Filed:
Dec. 28, 2015
Ricoh Company, Ltd., Tokyo, JP;
Akihisa Mikawa, Kanagawa, JP;
Tetsuya Fujioka, Kanagawa, JP;
Hideo Kanai, Tokyo, JP;
Yasunari Mikutsu, Tokyo, JP;
Satoshi Tsuchiya, Kanagawa, JP;
Jun Mashimo, Tokyo, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
An image projection apparatus that generates an image based on image data and projects the image, includes: an image generation element that uses light emitted from a light source to generate an image; a holding unit that rotatably holds the image generation element; and an illumination optical unit that includes one or more optical systems and a light tunnel that is a tubular member surrounding part of a light path from the light source to the image generation element and reflects the light by an inner surface thereof, and that projects the light passing through the light tunnel toward an entire area of a rotatable range of the image generation element.