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. 25, 2022
Filed:
Dec. 28, 2018
Ricoh Company, Ltd., Tokyo, JP;
Kento Nakamura, Kanagawa, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A display systemA includes a light deflectorthat scans the light beams that are emitted from a light-source devicein the main scanning direction and the sub-scanning direction orthogonal to the main scanning direction to form an intermediate imageon a screen, the screenthat disperses the light, a front windshieldthat reflects the diverging light diverging from the screen, and a free-form surface mirrorthat projects the diverging light diverging from the screentowards the screento form a virtual image. The screenis arranged so as to satisfy the condition in the following equation: S*O*(M+O)/(T*E*M)≤1.95 where S denotes distance between a location of eyepoint of the viewer of the virtual image and the virtual image, E denotes distance between the location of eyepoint of the viewer of the virtual image and an image forming optical system that uses the diverging light to form the virtual image, M denotes distance between the light deflector and the intermediate image, and O denotes distance between the intermediate image and the image forming optical system, and T denotes distance between the virtual image and the image forming optical system, where each distance indicates length of an optical path that passes through a center of an image formed by the light when an object is observed from a reference eyepoint.