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. 24, 2024
Filed:
Mar. 18, 2020
Naoki Nakamura, Saitama, JP;
Shiori Ohsugi, Kanagawa, JP;
Shigenobu Hirano, Kanagawa, JP;
Yasuo Katano, Kanagawa, JP;
Kenji Kameyama, Kanagawa, JP;
Norikazu Igarashi, Kanagawa, JP;
Aino Hasegawa, Kanagawa, JP;
Satomi Tanaka, Kanagawa, JP;
Masahiro Itoh, Kanagawa, JP;
Yoshifumi Sudoh, Kanagawa, JP;
Susumu Momma, Kanagawa, JP;
Shun Okazaki, Kanagawa, JP;
Naoki Nakamura, Saitama, JP;
Shiori Ohsugi, Kanagawa, JP;
Shigenobu Hirano, Kanagawa, JP;
Yasuo Katano, Kanagawa, JP;
Kenji Kameyama, Kanagawa, JP;
Norikazu Igarashi, Kanagawa, JP;
Aino Hasegawa, Kanagawa, JP;
Satomi Tanaka, Kanagawa, JP;
Masahiro Itoh, Kanagawa, JP;
Yoshifumi Sudoh, Kanagawa, JP;
Susumu Momma, Kanagawa, JP;
Shun Okazaki, Kanagawa, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A virtual image display device includes: an image display element that displays an image to be displayed as a virtual image; a propagation optical system that propagates light from the image display element; and a light guide member that guides the light propagated by the propagation optical system. The light guide member includes: a light beam incident part that introduces light including image information from the propagation optical system into the light guide member; an image extractor that extracts the light including image information from an inside of the light guide member; and an image emitter that emits the light including image information to an outside of the light guide member. The propagation optical system includes one or more optical members each having a curved surface shape that is non-rotationally symmetric with respect to an optical axis.