HEAD-UP DISPLAY SYSTEM

• US 20090034087A1
• Filed: 10/18/2007
• Published: 02/05/2009
• Est. Priority Date: 05/30/2007
• Status: Active Grant

• Current Assignee: Aurise Investment Company Limited
• Original Assignee: Opus Microsystems Corporation
• Inventors: Lin, Ta-wei, Hung, Chang-li, Yeh, Feng-chun
• Granted Patent: US 7,990,620 B2
• Time in Patent Office: Days
• US Class Current: 359/630
• CPC Class Codes: G02B 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 2027/0123 comprising devices increasing the field of view
• CPC Class Codes: G02B 2027/0127 comprising devices increasing the depth of field
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence
• CPC Class Codes: G02B 5/02 Diffusing elements; Afocal elements
• CPC Class Codes: G02B 5/0284 used in reflection
• CPC Class Codes: G02B 5/30 Polarising elements light-modulating devices with active elements G02F1/00

Abstract

A head-up display system is described. The head-up display system includes an image projection device, a diffusion unit, and a frame demonstration medium. The image projection device emits the visible light, containing text or image information, for generating a real image on the diffusion unit. The frame demonstration medium receives the visible light reflected from the diffusion unit. By adjusting the received visible light reflected from the diffusion unit, the frame demonstration medium generates a virtual image corresponding to the real image. The distance between the real image corresponding to the diffusion unit and the frame demonstration medium is preferably equal to the distance between the virtual image and the frame demonstration medium. Alternatively, the visible light is projected to the frame demonstration medium and then reflected to the diffusion unit. The frame demonstration medium again reflected visible light from the diffusion unit to generate a virtual image corresponding to the real image.

Claims

1. A head-up display system, comprising:

an image projection device, emitting visible light;

a diffusion unit, coupled to the image projection device, receiving the visible light emitted from the image projection device to generate a real image on the diffusion unit, and reflecting the real image; and

a frame demonstration medium coupled to the diffusion unit, receiving the visible light from the diffusion unit, and generating a virtual image corresponding to the real image, wherein the distance between the real image and the frame demonstration medium is equal to the distance between the virtual image and the frame demonstration medium.

2. The head-up display system of claim 1, wherein the diffusion unit is a diffusion film for diffusing the visible light and generating the real image on the diffusion film.

3. The head-up display system of claim 1, wherein the visible light from the image projection device is a laser beam.

4. The head-up display system of claim 3, wherein the frame demonstration medium is an optical film, having high reflectivity within a predetermined range of wave length, for filtering the laser beam and generating the virtual image corresponding to the real image.

5. The head-up display system of claim 4, wherein the wave length has a range from 400 nm to 700 nm.

6. The head-up display system of claim 1, wherein the visible light has a predetermined polarization direction.

7. The head-up display system of claim 6, wherein the frame demonstration medium is a polarization film for adjusting the reflection ratio of the visible light.

8. The head-up display system of claim 1, wherein the real image is generated on one side of the frame demonstration medium and the virtual image is generated on the other side of the frame demonstration medium.

9. A head-up display system, comprising:

an image projection device, emitting visible light;

a frame demonstration medium coupled to the image projection device, receiving the visible light emitted from the image projection device to reflect the received visible light; and

a diffusion unit coupled to the frame demonstration medium, receiving the reflected visible light from the frame demonstration medium for diffusing the visible light, reflecting the visible light back to the frame demonstration medium, and generating a real image on the diffusion unit;

wherein the frame demonstration medium adjusts the visible light and generates a virtual image corresponding to the real image.

10. The head-up display system of claim 9, wherein the diffusion unit is a diffusion film for diffusing the visible light and for generating the real image on the diffusion film.

11. The head-up display system of claim 9, wherein the visible light from the image projection device is a laser beam.

12. The head-up display system of claim 11, wherein the frame demonstration medium is an optical film, having high reflectivity within a predetermined range of wave length, and the optical film selectively reflects the laser beam.

13. The head-up display system of claim 12, wherein the wave length has a range from 400 nm to 700 nm.

14. The head-up display system of claim 9, wherein the visible light has a predetermined polarization direction.

15. The head-up display system of claim 14, wherein the frame demonstration medium is a polarization film and is able to adjust the reflection ratio of the visible light.

16. The head-up display system of claim 9, wherein the real image is generated on one side of the frame demonstration medium and the virtual image is generated on the other side of the frame demonstration medium.