PROJECTION SYSTEM FOR AUTOMOTIVE AND OTHER APPLICATIONS

• US 20080297726A1
• Filed: 04/16/2008
• Published: 12/04/2008
• Est. Priority Date: 06/01/2007
• Status: Abandoned Application

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Carls, Joseph C., RODRIGUEZ, Ernesto M. JR.
• Application Number:
  US12/103,803
• Publication Number:
  US 20080297726A1
• Time in Patent Office: Days
• US Class Current: 353/13
• CPC Class Codes: G02B 13/06 Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
• CPC Class Codes: G02B 13/16 for use in conjunction with image converters or intensifiers , or for use with projectors, e.g. objectives for projection TV
• CPC Class Codes: G02B 9/12 having three components only
• CPC Class Codes: G03B 21/14 Details
• CPC Class Codes: G03B 21/60 characterised by the nature of the surface
• CPC Class Codes: G03B 21/62 Translucent screens

Abstract

A projection system includes a projection device and a viewing surface. The projection device is configured to project an image onto the viewing surface. The viewing surface has a first side and a second side. The viewing surface is substantially diffuse reflective when viewed from the first side and substantially transparent when viewed from the second side. The viewing surface can also include a plurality of louvers adapted to attenuate light passing through the viewing surface. The viewing surface and the plurality of louvers can be part of a projection screen. The projection system can be included in a motor vehicle.

Claims

1. A projection system comprising:

a projection device comprising an optical engine; and

a viewing surface having a first side and a second side, wherein the viewing surface is substantially diffuse reflective when viewed from the first side and substantially transparent when viewed from the second side,

wherein the projection device is configured to project an image onto the viewing surface.

2. The projection system of claim 1, wherein the viewing surface comprises a perforated projection screen.

3. The projection system of claim 1, wherein the viewing surface comprises:

a transparent substrate;

a light-reflective coating disposed on one side of the substrate and having a plurality of openings; and

a light-absorbing coating disposed on and in register with the light-reflective coating.

4. The projection system of claim 1, wherein the viewing surface comprises a plurality of louvers adapted to attenuate light passing through the viewing surface.

5. The projection system of claim 1, wherein the optical engine has a throw ratio of about 2.0 or less.

6. The projection system of claim 1, wherein the optical engine has a throw ratio of about 1.5 or less.

7. The projection system of claim 1, wherein the optical engine has a throw ratio of about 1.0 or less.

8. The projection system of claim 1, wherein the optical engine is disposed in a housing.

9. The projection system of claim 1, wherein the projection system has an offset of 0% to 300%.

10. The projection system of claim 1, wherein the projection system has an offset of 100% to 200%.

11. The projection system of claim 1, wherein the image comprises a moving image.

12. The projection system of claim 1, wherein the projection device is configured to project two or more separate images onto one or more viewing surfaces.

13. A projection screen comprising:

a viewing surface having a first side and a second side, wherein the viewing surface is substantially diffuse reflective when viewed from the first side and substantially transparent when viewed from the second side; and

a plurality of louvers connected to the viewing surface and adapted to attenuate light passing through the viewing surface.

14. The projection screen of claim 13, wherein the plurality of louvers has an open area of about 50% or more.

15. The projection screen of claim 13, wherein the plurality of louvers has an open area of about 70% or more.

16. The projection screen of claim 13, wherein the plurality of louvers has an open area of about 90% or more.

17. The projection screen of claim 13, wherein the plurality of louvers has a louver width to louver spacing ratio of about 50 or less.

18. The projection screen of claim 13, wherein the plurality of louvers has a louver width to louver spacing ratio of about 20 or less.

19. A motor vehicle comprising:

a projection system comprising;

a projection device comprising an optical engine; and

a viewing surface having a first side and a second side, wherein the viewing surface is substantially diffuse reflective when viewed from the first side and substantially transparent when viewed from the second side,

wherein the projection device is configured to project an image onto the viewing surface.

20. The motor vehicle of claim 19, wherein the viewing surface comprises a perforated projection screen.

21. The motor vehicle of claim 19, wherein at least one of the projection device and the viewing surface is positioned in a rear passenger compartment of the motor vehicle.

22. The motor vehicle of claim 19, wherein the projection device is coupled to a ceiling of the motor vehicle.

23. The motor vehicle of claim 19, wherein the projection device is coupled to a floor board of the motor vehicle.

24. The motor vehicle of claim 19, wherein the projection device is positioned in an internal compartment of a ceiling of the motor vehicle.

25. The motor vehicle of claim 19, wherein the projection device is co-located with a dome light of the motor vehicle.

26. The motor vehicle of claim 19, wherein the image comprises a moving image.

27. The motor vehicle of claim 19, wherein the projection device is configured to project two or more separate images onto one or more viewing surfaces.