Head-up display device for motor vehicles

US5552935A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Peter Knoll · Ettlingen, DE
• Winfried Konig · Berlin, DE
• Rudiger Mock-Hecker · Neu-Ulm, DE

Key dates

• Filing date: Jan 2, 1991
• Grant date: Sep 3, 1996
• Expiry date: Jan 2, 2011

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2027/0194
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Head-up displays on motor vehicles often have double images and interfering reflections on the windshield. To avoid these, arrangements of linear polarization filters or shutter foils are suggested, which have particularly high light transmission. Arrangements of filter plates on a combiner inside of the windshield are also advantageous.