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:
Oct. 16, 2012
Filed:
Mar. 27, 2008
Toshiki Ishikawa, Ichinomiya, JP;
Hiroshi Ando, Nagoya, JP;
Takayuki Fujikawa, Nagoya, JP;
Denso Corporation, Kariya, Aichi-Pref., JP;
Abstract
A head-up display apparatus allows an occupant of a vehicle to visually perceive a virtual image of an image light reflected by a windshield after passing through a cylindrical lens. The cylindrical lens is inclined against the image light to thereby reflect outside light not to reach an eye range of the occupant. The cylindrical lens is placed in a light guide portion such that (i) an action axis direction for an optical action and (ii) a horizontal direction in the display image agree with each other. Of the cylindrical lens, an inclination angle and installation depth are so set that light incident at an angle equal to or greater than an interception upper-limit incident angle and reflected by a pass-through side of the cylindrical lens does not arrive at the eye range of the occupant.