Display device

• US 6,791,511 B2
• Filed: 11/30/2001
• Issued: 09/14/2004
• Est. Priority Date: 12/21/1999
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Fiess, Reinhold, Eschler, Johannes
• Primary Examiner(s): Liang, Regina
• Assistant Examiner(s): Dinh, Duc Q.
• Application Number:
  US09/913,981
• Publication Number:
  US 20020167498A1
• Time in Patent Office: 1,019 Days
• Field of Search: 345/7-9, 359/630, 359/631, 348/115, 349/11
• US Class Current: 345/8
• CPC Class Codes: G02B 2027/0121 Parasitic image effect attenuation by suitable positioning of the parasitic images
• CPC Class Codes: G02B 2027/0154 with movable elements
• CPC Class Codes: G02B 2027/0156 with optionally usable elements
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence

Abstract

A display device for a motor vehicle is proposed, which is used to display a virtual image on the windshield of a motor vehicle. The image is displayed by way of an image-forming unit which is arranged in an upper area of the windshield or in a region of the vehicle roof. The generated image is guided via a first aspherical mirror and a second aspherical mirror onto the windshield.

Claims

1. A display device in a motor vehicle, comprising:

an image-forming unit arranged in one of an area of a vehicle roof and in an upper region of a windshield of the motor vehicle;

a first aspherical mirror arranged in the area of the vehicle roof; and

a second aspherical mirror arranged in a region of a dashboard of the motor vehicle, wherein;

light emitted by the image-forming unit is transmittable to the first aspherical mirror,

light from the first aspherical mirror is projectable onto the second aspherical mirror,

light from the second aspherical mirror is projectable onto the windshield, and

a virtual image is able to be formed on the windshield.

2. The display device according to claim 1, wherein:

the second aspherical mirror is arranged on the dashboard in a manner that the second aspherical mirror can be covered.

3. The display device according to claim 2, wherein:

the second aspherical mirror is arranged on a top side of the dashboard.

4. The display device according to claim 1, further comprising:

at least one motor for performing a motor-adjustment on at least one of the first aspherical mirror and the second aspherical mirror.

5. The display device according to claim 1, further comprising:

an operating control element arranged in the motor vehicle and for adjusting at least one of the first aspherical mirror, the second aspherical mirror, and an image brightness of the virtual image formed onto the windshield.

6. The display device according to claim 1, wherein:

the first aspherical mirror has a focal distance in a range from 50 mm to 120 mm, and

the second aspherical mirror has a focal distance in a range from 300 mm to 800 mm.

7. The display device according to claim 1, wherein:

the image-forming unit includes one of a backlit liquid-crystal cell, a laser display, a micro-mirror display, a vacuum fluorescent display, and a plasma display.

8. The display device according to claim 1, wherein:

the windshield is wedge-shaped.

9. The display device according to claim 1, wherein:

the image-forming unit is arranged on an interior mirror module.

10. The display device according to claim 1, wherein:

the first aspherical mirror is arranged on an interior mirror module.

11. The display device according to claim 1, wherein:

the first aspherical mirror is arranged on a housing at the vehicle roof.

12. The display device according to claim 1, further comprising:

a camera arranged on the motor vehicle, wherein;

an image picked up by the camera is able to be projected as the virtual image on the windshield.

13. The display device according to claim 12, wherein:

the camera includes an infrared camera.

14. The display device according to claim 1, further comprising:

a foil for covering the second aspherical mirror and for reducing a visibility of second aspherical mirror.