Patent · US Expired

Projection unit for a head-up display

US7298557B2 · kind B2 · utility

9Cited by

6References

10Claims

0Family size

Inventors

Hans-Juergen Dobschal · Kleinromstedt, DE
Dirk Jahn · Twistringen, DE

Key dates

Filing date	Mar 16, 2006
Grant date	Nov 20, 2007
Priority date	—
Expiry date	Mar 16, 2026

Classification

Technology area (CPC G)Physics
CPC primaryG02B2027/0118
WIPO fieldOptics
WIPO sectorInstruments

Abstract

The invention is directed is directed to a projection unit for a head-up display having an image generator, a mirror and a refractive lens which are arranged in a housing one behind the other in the light propagation direction. The beam path is directed to a windshield. Notably the mirror has a concave reflection surface, and the lens has a free-form surface at lease on one of the optically active surfaces (D-U and/or D-O).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.