Head up display utilizing an LCD and a diffuser

US8786519B2 · kind B2 · utility

Assignee

• Elbit Systems Ltd. · IL

Inventors

• Yoel Blumenfeld · Rehovot, IL
• Ofer Sinai · Netanya, IL
• Shmuel Roth · Netanya, IL
• Guy Kaufman · Rehovot, IL

Key dates

• Filing date: Mar 2, 2009
• Grant date: Jul 22, 2014
• Expiry date: Aug 2, 2030

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2027/015
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Head up display (HUD) for displaying a combined image of a scene image of a scene and an informative image, for an observer, the HUD including an image source, an optical relay, a low physical height horizontally expanding optical assembly and a planar optical module, the image source for producing a substantially small narrow angle informative image, the optical relay for producing a substantially large narrow angle informative image, by enlarging the substantially small narrow angle informative image, received from the image source, the low physical height horizontally expanding optical assembly for producing a horizontally expanded image, by horizontally expanding the substantially large narrow angle informative image, received from the optical relay, and the planar optical module for producing a substantially large informative image, by vertically expanding the horizontally expanded image, and further producing the combined image, by combining the substantially large informative image with the scene image.