Visual display system for producing a continuous virtual image

• US 6,152,739 A
• Filed: 11/20/1998
• Issued: 11/28/2000
• Est. Priority Date: 11/20/1998
• Status: Expired due to Term

• Current Assignee: The Boeing Co.
• Original Assignee: Mcdonnell Douglas Corporation (The Boeing Co.)
• Inventors: VanHoogstrate, John A., Amery, John G., Stockton, Michael E.
• Primary Examiner(s): Cheng, Joe H.
• Application Number:
  US09/197,025
• Time in Patent Office: 739 Days
• Field of Search: 434/23, 434/24, 434/29, 434/30, 434/35, 434/38, 434/43, 434/44, 434/519, 434/220, 434/322, 434/336, 434/365, 434/372, 273/434, 273/148 B, 345/1, 345/7, 345/156, 345/157, 345/158, 345/427, 345/473, 348/36, 348/39, 348/121, 348/383, 348/580, 382/113, 382/284, 382/552, 396/322, 359/10, 359/24, 359/34, 359/258, 359/407, 359/482, 359/630, 359/640
• US Class Current: 434/38
• CPC Class Codes: G06F 3/1446 display composed of modules, e.g. video walls
• CPC Class Codes: G09B 9/32 by projected image G09B9/307, G09B9/36 take precedence
• CPC Class Codes: G09B 9/34 by cathode-ray screen display G09B9/307, G09B9/36 take precedence

Abstract

A visual display system for producing a continuous far-focused virtual image according to the present invention includes a number of adjacent video image generation and display modules. Each module includes an image generator that generates a video image representative of a portion of a composite display image displayed on a video display. The visual display system also includes a number of optical viewing lenses associated with each video image generation and display modules and positioned between the operator and the video display. The lenses restrict the operator'"'"'s field of view such that the operator views only a portion of the active display area of the video displays. The lenses of adjacent modules are joined together along their edges to form an enclosure partially surrounding the operator so that the operator views the composite display image displayed on the video displays through the lenses and perceives the composite display image as a continuous far-focused virtual image.

Claims

1. A visual display system for producing a composite display image perceived as a continuous far-focused virtual image by an operator positioned in a predetermined viewing volume and having an associated field of view concentrically surrounding a line of sight extending outwardly from the operator'"'"'s viewing volume, the display system comprising:

a plurality of adjacent video image generation and display modules, each module comprising;

an image generator that generates a video image, wherein the video image is representative of a portion of the composite display image; and

a video display, operatively connected to the image generator and responsive to the video image generated by the image generator, that displays the portion of the composite display image, wherein the video display comprises a border surrounding a display area; and

a plurality of adjacent lenses, each lens associated with one module and positioned between the operator and the video display, wherein each lens restricts the operator'"'"'s field of view such that the operator views only a portion of the display area of the video display;

wherein the lens associated with adjacent modules are joined together along their edges to form an enclosure partially surrounding the operator so that the operator views the composite display image displayed on the plurality of video displays through the plurality of lenses and perceives the composite display image as a continuous far-focused virtual image.

2. The visual display system of claim 1 wherein the portion of the composite display image displayed on each video display overlaps the portion of the composite display image displayed on adjacent video displays and wherein each lens is positioned such that the portion of the display area viewed by the operator through the lens does not overlap any of the portion of the display area viewed by the operator through adjacent lenses.

3. The visual display system of claim 1 wherein each of the plurality of lenses has an associated focal length designed such that the portion of the composite display image viewed through the lenses is focused at a desired distance.

4. The visual display system of claim 1 wherein each of the plurality of lenses comprises a planar surface having five or six sides.

5. The visual display system of claim 4 wherein the sides of the lens completely intersect with the sides of their adjacent lenses.

6. The visual display system of claim 4 wherein each of the plurality of lens is oriented parallel to its associated video display and substantially perpendicular to a line extending from the operator'"'"'s viewing volume to the center of the associated video display.

7. The visual display system of claim 1 wherein the plurality of lenses are shaped and positioned to tessellate a sphere partially surrounding the operator.

8. The visual display system of claim 1 wherein each of the plurality of lenses comprises a positive aspheric lens mounted in front of one of the video displays.

9. The visual display system of claim 8 wherein the positive aspheric lens is a Fresnel type lens.

10. The visual display system of claim 1 wherein each image generation and display module further comprises a database comprising data accessed by the image generator to generate the video image, the display system further comprising a display system controller for providing each module with an index into the database so that the image generator can access data associated with the portion of the composite video image displayed on the video display.

11. The visual display system of claim 1 wherein the video display comprises flat-panel displays.

12. A visual display system for use as part of an aircraft flight simulator operated by a simulation pilot, the visual display system producing a composite display image perceived as a far-focused continuous virtual image by the simulation pilot positioned in a predetermined viewing volume and having an associated field of view concentrically surrounding a line of sight extending outwardly from the simulation pilot'"'"'s viewing volume, the display system comprising:

a plurality of adjacent video image generation and display modules, each module comprising;

an image generator that generates a video image, wherein the video image is representative of a portion of the composite display image; and

a video display, operatively connected to the image generator and responsive to the video image generated by the image generator for displaying the portion of the composite video image, wherein the video display comprises a border surrounding a display area; and

a plurality of adjacent lenses, each lens associated with one module and positioned between the simulation pilot and the video display, wherein each lens restricts the simulation pilot'"'"'s field of view such that the simulation pilot views only a portion of the display area of the video display;

wherein the lenses associated with adjacent modules are joined together along their edges to form an enclosure partially surrounding the simulation simulation pilot so that the pilot views the composite display image displayed on the plurality of video displays through the plurality of lenses and perceives the composite display image as a continuous far-focused virtual image.

13. The visual display system of claim 12 wherein the portion of the composite display image displayed on each video display overlaps the portion of the composite display image displayed on adjacent video displays and wherein each lens is positioned such that the portion of the display area viewed by the simulation pilot through the lens does not overlap any of the portion of the display area viewed by the simulation pilot through adjacent lenses.

14. The visual display system of claim 12 wherein each of the plurality of lenses has an associated focal length designed such that the portion of the composite display image viewed through the lenses is focused at a desired distance.

15. The visual display system of claim 12 wherein each of the plurality of lenses comprises a planar surface having five or six sides.

16. The visual display system of claim 15 wherein the sides of the lenses completely intersect with the sides of their adjacent lenses.

17. The visual display system of claim 15 wherein each of the plurality of lenses is oriented parallel to its associated video display and substantially perpendicular to a line extending from the simulation pilot'"'"'s viewing volume to the center of the associated video display.

18. The visual display system of claim 12 wherein the plurality of lenses are shaped and positioned to tessellate a sphere partially surrounding the simulation pilot.

19. The visual display system of claim 12 wherein each of the plurality of lenses comprises a positive aspheric lens mounted in front of one of the video displays.

20. The visual display system of claim 19 wherein the positive aspheric lens is a Fresnel type lens.

21. The visual display system of claim 12 wherein each video image generation and display module further comprises a database comprising data accessed by the image generator to generate the video image, the display system further comprising a display system controller for providing each module with an index into the database so that the image generator can access data associated with the portion of the composite video image displayed on the video display.

22. The visual display system of claim 12 wherein the video displays comprise flat-panel displays.

23. The visual display system of claim 12 further comprising a flight simulation controller for controlling the video image generated by the plurality of image generators in response to control signals provided by the simulation pilot.

24. A method for producing a composite display image perceived as a continuous far-focused virtual image by an operator positioned in a predetermined viewing volume and having an associated field of view concentrically surrounding a line of sight extending outwardly from the operator'"'"'s viewing volume, the method comprising the steps of:

generating a plurality of video images, wherein each video image is representative of a portion of the composite display image;

arranging a plurality of adjacent video displays that display one of the plurality of video images, wherein the video displays each comprise a border surrounding a display area;

arranging a plurality of adjacent lenses, each lens associated with one video display and positioned between the operator and the video display, wherein each lens restricts the operator'"'"'s field of view such that the operator views only a portion of the display area of the video display;

arranging adjacent lenses such that their edges are joined together to form an enclosure partially surrounding the operator so that the operator views the continuous far-focused virtual image displayed on the plurality of video display through the plurality of lenses.

25. The method of claim 24 wherein the portion of the composite display image displayed on each video display overlaps the portion of the composite display image displayed on adjacent video displays and wherein each lens is positioned such that the portion of the display area viewed by the operator through the lens does not overlap any of the portion of the display area viewed by the operator through adjacent lenses.