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:
Apr. 14, 2015
Filed:
Oct. 21, 2011
Toshiki Ishikawa, Ichinomiya, JP;
Toshiki Ishikawa, Ichinomiya, JP;
Denso Corporation, Kariya, JP;
Abstract
A head-up display device for projecting an image on a display screen includes: a liquid crystal display element for generating an original image; a light source for emitting light toward the liquid crystal display element; a reflection mirror for reflecting a light image of the original image passing through the liquid crystal display element and for projecting the light image on the display screen; and a concave cylindrical lens having a concave surface and disposed between the liquid crystal display element and the reflection mirror. The concave surface has a curved shape along with x axis of three-dimensional coordinates of the concave cylindrical lens. The concave surface extends along with y axis. The concave surface is rotated around the x axis so that z axis of the concave surface is tilted from an optical axis from the light source to the reflection mirror.