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:
Jul. 11, 2023
Filed:
Jul. 10, 2018
Shimadzu Corporation, Kyoto, JP;
Masato Tanaka, Kyoto, JP;
Shimadzu Corporation, Kyoto, JP;
Abstract
In an image display device in which two light guides are combined, flat plates () of the same material as that of a substrate () of a first light guide () is affixed to the outsides of a first surface () and a second surface () of the substrate (), the first surface () and the second surface () opposing each other. Image light introduced into the substrate () is reflected by an incident-side reflective surface () toward exit-side reflective surface (to), which are half mirrors, and a part of the image light is reflected in stages by the respective exit-side reflective surfaces (and) and the remainder of the image light is transmitted. The image light reflected by the exit-side reflective surfaces (to) is emitted through the second flat plate () and introduced into a second light guide. The part of the image light reflected by the incident-side reflective surface () reaches the interface between the first surface () and the first flat plate (), but enters the flat plate () without being reflected, and hits and is absorbed by a light-absorbing sheet (). This reduces the occurrence of stray light and improves the visibility of a virtual image displayed before user's eyes.