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. 03, 2023
Filed:
Oct. 30, 2018
Hitachi-lg Data Storage, Inc., Tokyo, JP;
Seiji Murata, Tokyo, JP;
Ryuji Ukai, Tokyo, JP;
Tomoto Kawamura, Tokyo, JP;
Toshiteru Nakamura, Tokyo, JP;
HITACHI-LG DATA STORAGE, INC., Tokyo, JP;
Abstract
There is provided a highly efficient virtual image projection device in a small size that displays images of high luminance in which an illumination system is reduced in size with no degradation in an effective luminous light beam. A virtual image projection device that shows video to a human eye includes a virtual light source surface () that emits a light beam in a predetermined angular distribution, an image forming lens () that condenses the light beam from the virtual light source surface (), and a display () that creates video. When the virtual light source surface () is disposed at a nearly focal position on the front side of the image forming lens (), the display () is disposed at a nearly focal position on the rear side of the image forming lens.