Head up display for vehicles

Details Head up display for vehicles Head up display for vehicles

2008-05-16

2011-10-04

Mack, Ricky (Department: 2873)

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

Reexamination Certificate

active

08031406

ABSTRACT:
A head up display for vehicles includes: at least one light source; at least one light guide set in front of the light source; an image panel set in front of the light guide; and a surface with the feature of at least partial specular reflection. Wherein the light emitted from the light source illuminates the image panel via the light guide to project an image on the image panel onto the surface and then be reflected to an observer, so as to form a virtual image observed by the observer. The light guide of the present invention can reduce the light loss of the head up display for vehicles and make the illumination light on the image panel more homogeneous and possessing high directionality, and so as to improve the brightness and quality of the virtual image formed by the head up display for vehicles.

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patent: 2005/0052873 (2005-03-01), Sokolov
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