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. 20, 2022
Filed:
Jul. 04, 2017
Applicants:
Maxell, Ltd., Kyoto, JP;
Hitachi Industry & Control Solutions, Ltd., Hitachi, JP;
Inventors:
Assignees:
MAXELL, LTD., Kyoto, JP;
HITACHI INDUSTRY & CONTROL SOLUTIONS, LTD., Hitachi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/01 (2006.01); G02B 17/08 (2006.01); B60K 35/00 (2006.01);
U.S. Cl.
CPC ...
G02B 27/0101 (2013.01); B60K 35/00 (2013.01); G02B 17/0816 (2013.01); G02B 27/0149 (2013.01); B60K 2370/1529 (2019.05); G02B 2027/015 (2013.01);
Abstract
A projection optical system includes an eyepiece optical system configured to refract and reflect a light emitted from an image forming unit for forming image information to display a virtual image, wherein the eyepiece optical system includes at least a concave lens, a folding mirror, and a concave mirror which are successively placed in order from the image forming unit including a liquid crystal display panel. The projection optical system configured as above is provided on a head-up display.