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. 01, 2020
Filed:
May. 25, 2018
Maxell, Ltd., Kyoto, JP;
Toshimitsu Watanabe, Otokuni-gun, JP;
Hiroyuki Kajikawa, Otokuni-gun, JP;
Tomoki Yamamoto, Otokuni-gun, JP;
Takumi Nakada, Otokuni-gun, JP;
MAXELL, LTD., Kyoto, JP;
Abstract
A head-up display includes a backlight, a liquid crystal display panel, a virtual image optical system, a wavelength selection member that is made of resin having an optical characteristic which absorbs infrared rays and transmits a visible light, and a housing that houses the virtual optical system and the wavelength selection member, in which the virtual optical system includes a lens unit and a free-form surface mirror disposed along an emission direction of the display image light in order from a position closer to an emission surface of the display image light in the liquid crystal display panel, and the wavelength selection member is disposed on an optical path of the display image light extending from an emission surface of the display image light in the liquid crystal display panel to an opening of the housing.