Magnified background image spatial object display

• US 5,782,547 A
• Filed: 11/08/1996
• Issued: 07/21/1998
• Est. Priority Date: 11/08/1996
• Status: Expired due to Term

• Current Assignee: Videotronic Systems
• Original Assignee: Videotronic Systems
• Inventors: Machtig, Jeffrey, McNelley, Steve
• Primary Examiner(s): DOWLING, WILLIAM C
• Application Number:
  US08/748,499
• Time in Patent Office: 620 Days
• Field of Search: 353/28, 353/30, 353/38, 353/10, 353/7, 353/8, 359/458, 359/478, 359/479, 352/86
• US Class Current: 353/28
• CPC Class Codes: G02B 30/56 by projecting aerial or floating images
• CPC Class Codes: G03B 15/10 using back-projection, i.e. blending artificial background with real foreground
• CPC Class Codes: G03B 35/24 using apertured or refractive resolving means on screens or between screen and eye
• CPC Class Codes: H04N 13/346 using prisms or semi-transparent mirrors
• CPC Class Codes: H04N 13/363 using image projection screens volumetric display H04N13/388
• CPC Class Codes: H04N 13/395 with depth sampling, i.e. the volume being constructed from a stack or sequence of 2D image planes
• CPC Class Codes: H04N 7/144 camera and display on the same optical axis, e.g. optically multiplexing the camera and display for eye to eye contact
• CPC Class Codes: H04N 7/15 Conference systems

Abstract

An improved transmissive spatial object display provides a background image that appears to observers to have 3-D depth and includes the added advantages of permitting several viewers to observe the display simultaneously so that the background image appears on an accessible screen like that of televisions and computer monitors. A background image display is observed directly through a first Fresnel lens of a two Fresnel lens transmissive spatial object display which lens magnifies the background image display and also provides the front screen of the device. A first partially transparent mirror at 45 degrees separates the two Fresnel lenses permitting the background image display to be viewed solely through the first Fresnel lens. The first Fresnel lens serves the dual function of creating a first spatial object (in combination with the second Fresnel lens) and magnifying the background image. The magnified background image appears through the first Fresnel lens creating a pseudo 3-D appearance even though the background image is generated by a 2-dimensional display such as a CRT. Video production techniques can enhance this illusion of dimensionality through isolation of objects and graphics on a black field and use of dimensionalizing techniques such as reflections and shadings. Alternate embodiments provide projection of multiple spatial objects. Additional embodiments are configured without the second Fresnel lens so that the first Fresnel lens serves to magnify the background display'"'"'s image and by itself creates the first spatial object.

Claims

1. A spatial object image display device for displaying natural appearing luminous spatial objects against a background image so that the spatial objects appear to float in space beyond the device, the display device comprising:

a first luminous display screen for providing a first image that will form a first spatial object;

a second luminous display screen for providing a second image that acts as a background image;

a first Fresnel lens spaced apart from the second luminous display for projecting the image on the first display screen beyond said lens to appear as a first spatial object, for magnifying the second image to impart pseudo-three-dimensionality to the background image, and for forming a front surface of the device, the front surface readily viewable by observers being completely open to ambient room light with no shroud or surrounding structure; and

a housing including the display screens and the first Fresnel lens with the first Fresnel lens forming the front surface of the housing.

2. The device of claim 1 further comprising a masking means applied to one of the Fresnel lenses for suppressing a luminous aberration viewable in the first Fresnel lens.

3. The device of claim 1 further comprising a semi-reflective mirror disposed between the first Fresnel lens and the first luminous display for ensuring that images from both the first luminous display and the second luminous display reach the first Fresnel lens.

4. The device of claim 1, wherein the first image comprises a luminous object displayed against a darkened field to enhance the three-dimensionality of the first spatial object and to substantially eliminate a visible perimeter of the first luminous display screen.

5. The device of claim 1, wherein the background image consists of an object or objects displayed against a darkened field to substantially eliminate a visible perimeter of the second luminous display screen and to enhance the three-dimensionality of the background image.

6. The device of claim 1, wherein the first image is coordinated with the second image to produce enhanced visual effects including the appearance that an object detaches from the background image and comes to float in space in front of the background image.

7. The device of claim 1, wherein interactive control means are provided for manipulating at least the first spatial object.

8. The device of claim 1 further comprising a second Fresnel lens disposed so as to reduce the apparent distance between the front surface of the device and the first spatial object.

9. The device of claim 8 further comprising a third Fresnel lens to increase the apparent size of the first spatial object or reduce the distance of the first spatial object from the front surface of the device.

10. The device of claim 1 further comprising a reflection reduction layer applied to a surface of the first Fresnel lens.

11. The device of claim 1 further comprising a third luminous display screen disposed in relation to the first Fresnel lens to produce a second spatial object.

12. The device of claim 1 further comprising a mechanical movement means for manipulating size, position, and distance of at least the first spatial object.

13. A spatial object image display device for displaying natural appearing luminous spatial objects against a background image so that the spatial objects appear to float in space beyond the device, the display device comprising:

a first luminous display screen for providing a first image that will form a first spatial object;

a second luminous display screen for providing a second image that acts as a background image;

a first Fresnel lens spaced apart from the second luminous display for projecting the image on the first display screen beyond said lens to appear as a first spatial object, for magnifying the second image to impart pseudo-three-dimensionality to the background image, and for forming a front surface of the device, the front surface readily viewable by observers being completely open to ambient room light with no shroud or surrounding structure;

a second Fresnel lens spaced apart from the first luminous display for working in consort with the first Fresnel lens for projecting the image on the first display screen beyond the first Fresnel lens to form the first spatial object;

a semi-reflective mirror disposed between the first Fresnel lens and the first luminous display for ensuring that images from both the first luminous display and the second luminous display reach the first Fresnel lens; and

a housing including the display screens and the Fresnel lenses with the first Fresnel lens forming the front surface of the housing.

14. The device of claim 13 further comprising a masking means applied to one of the Fresnel lenses for suppressing a luminous aberration viewable in the first Fresnel lens.

15. The device of claim 13, wherein the first image comprises a luminous object displayed against a darkened field to enhance the three-dimensionality of the first spatial object and to substantially eliminate a visible perimeter of the first luminous display screen.

16. The device of claim 13, wherein the background image consists of an object or objects displayed against a darkened field to substantially eliminate a visible perimeter of the second luminous display screen and to enhance the three-dimensionality of the background image.

17. The device of claim 13, wherein the first image is coordinated with the second image to produce enhanced visual effects including the appearance that an object detaches from the background image and comes to float in space in front of the background image.

18. The device of claim 13, wherein interactive control means are provided for manipulating at least the first spatial object.

19. The device of claim 13 further comprising a third Fresnel lens to increase the apparent size of the first spatial object or reduce the distance of the first spatial object from the front surface of the device.

20. The device of claim 13 further comprising a reflection reduction layer applied to a surface of the first Fresnel lens.

21. The device of claim 13 further comprising a third luminous display screen disposed in relation to the first Fresnel lens to produce a second spatial object.

22. The device of claim 13 further comprising a mechanical movement means for manipulating size, position, and distance of at least the first spatial object.

23. A spatial object image display device for displaying natural appearing luminous spatial objects against a background image so that the spatial objects appear to float in space beyond the device, the display device comprising:

a first luminous display screen for providing a first image that will form a first spatial object;

a second luminous display screen for providing a second image that acts as a background image;

a first Fresnel lens spaced apart from the second luminous display for projecting the image on the first display screen beyond said lens to appear as a first spatial object, for magnifying the second image to impart pseudo-three-dimensionality to the background image, and for forming a front surface of the device, the front surface readily viewable by observers being completely open to ambient room light with no shroud or surrounding structure;

a second Fresnel lens spaced apart from the first luminous display for working in consort with the first Fresnel lens for projecting the image on the first display screen beyond the first Fresnel lens to form the first spatial object;

a third Fresnel lens spaced apart from the second Fresnel lens for magnifying size of the first spatial object or reducing distance from the first spatial object to the front surface of the device;

a semi-reflective mirror disposed between the first Fresnel lens and the first luminous display for ensuring that images from both the first luminous display and the second luminous display reach the first Fresnel lens; and

a housing including the display screens and the Fresnel lenses with the first Fresnel lens forming the front surface of the housing.

24. The device of claim 23 further comprising a masking means applied to one of the Fresnel lenses for suppressing a luminous aberration viewable in the first Fresnel lens.

25. The device of claim 23, wherein the first image comprises a luminous object displayed against a darkened field to enhance the three-dimensionality of the first spatial object and to substantially eliminate a visible perimeter of the first luminous display screen.

26. The device of claim 23, wherein the background image consists of an object or objects displayed against a darkened field to substantially eliminate a visible perimeter of the second luminous display screen and to enhance the three-dimensionality of the background image.

27. The device of claim 23, wherein the first image is coordinated with the second image to produce enhanced visual effects including the appearance that an object detaches from the background image and comes to float in space in front of the background image.

28. The device of claim 23, wherein interactive control means are provided for manipulating at least the first spatial object.

29. The device of claim 23 further comprising a reflection reduction layer applied to a surface of the first Fresnel lens.

30. The device of claim 23 further comprising a third luminous display screen disposed in relation to the first Fresnel lens to produce a second spatial object.

31. The device of claim 23 further comprising a mechanical movement means for manipulating size, position, and distance of at least the first spatial object.

32. A spatial object image display device for displaying natural appearing luminous spatial objects so that the spatial objects appear to float in space beyond the device, the display device comprising:

a luminous image source for providing a first image that will form a first spatial object;

a Fresnel lens spaced apart from the luminous source for projecting the first image beyond said lens to appear as a first spatial object, and for forming a front surface of the device, the front surface readily viewable by observers being completely open to ambient room light with no shroud or surrounding structure;

a reflection reduction layer disposed in proximity to the front surface of the device for reducing light reflection from the Fresnel lens and for increasing apparent contrast of the first spatial object; and

a housing including the image source and the Fresnel lens with the Fresnel lens forming the front surface of the housing.

33. The device of claim 32, wherein the reflection reduction layer is selected from the group consisting of a neutral density filter, a gray transparent panel, an image blocking film, and a black mirror.

34. A reflective or transmissive spatial object image display device for displaying natural appearing luminous spatial objects against a background image so that the spatial objects appear to float in space beyond the device, the display device comprising:

a luminous image source for providing a first image that will form a first spatial object;

a diffused/transparent rear projection screen acting as either a transparent screen or a diffused rear projection screen;

spatial optical means for projecting the first image through the alternating diffused/transparent screen to form a first spatial object; and

optical projection means for projecting a background image onto the diffused/transparent screen with said screen acting as a rear projection screen.

35. The device of claim 34, wherein the diffused/transparent screen treats impinging light differently depending on polarization state of the light so that said screen acts as a diffused screen to light polarized in one direction and acts as a transparent screen to light polarized in an opposite direction, wherein the optical projection means produces light polarized so said screen acts as a diffused rear projection screen to the background image, and wherein the spatial optical means produces light polarized so said screen acts as a transparent screen allowing the first image to pass through.

36. The device of claim 34, wherein the diffused/transparent screen alternates rapidly between a diffused rear projection mode and a transparent mode, and wherein at least one of the spatial optical means and the optical projection means are synchronized with alternation of said screen.