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:
Dec. 15, 2020
Filed:
Oct. 30, 2017
Konica Minolta, Inc., Tokyo, JP;
Kentarou Nakamura, Tokyo, JP;
Norihide Yamada, Chiyoda-ku, JP;
Eiji Nomura, Kokubunji, JP;
Junji Hashimura, Hachioji, JP;
Shinichiro Saito, Hachioji, JP;
Konica Minolta, Inc., Tokyo, JP;
Abstract
An object of the present invention is to provide a virtual image display optical system that is capable of substantially simultaneously displaying virtual images at a plurality of distances even with a simple configuration, and an image display device using the virtual image display optical system. A virtual image display optical system () according to the present invention is provided with: a display element (); a projection optical system () that enlarges an image formed on the display element (); a diffusing screen () that has a diffusing function, and is positioned on the light emission side of the projection optical system (); and a virtual image forming optical system () that converts an image on the diffusing screen () into a virtual image, wherein the virtual image display optical system () is further provided with a positioning changing device () that changes a position of the diffusing screen ().