Video display system and method for generating and individually positioning high resolution inset images

• US 5,487,665 A
• Filed: 10/31/1994
• Issued: 01/30/1996
• Est. Priority Date: 10/31/1994
• Status: Expired due to Term

• Current Assignee: Mcdonnell Douglas Corporation (The Boeing Co.)
• Original Assignee: Mcdonnell Douglas Corporation (The Boeing Co.)
• Inventors: Streid, Harold R., Lechner, Robert J.
• Primary Examiner(s): CHENG, JOE H
• Application Number:
  US08/331,418
• Time in Patent Office: 456 Days
• Field of Search: 434/38, 434/44, 434/43, 434/68, 434/307 R, 434/308, 434/365, 434/20, 434/27, 434/29, 348/61, 348/117, 348/121, 348/744, 345/8, 345/9, 352/85, 353/30, 359/630
• US Class Current: 434/44
• CPC Class Codes: G06T 3/403 Edge-driven scaling; Edge-based scaling
• CPC Class Codes: G09B 9/302 the image being transformed by computer processing, e.g. updating the image to correspond to the changing point of view
• CPC Class Codes: G09B 9/32 by projected image G09B9/307, G09B9/36 take precedence
• CPC Class Codes: G09B 9/326 the image being transformed by optical means
• CPC Class Codes: G09B 9/36 Simulation of night or reduced visibility flight
• CPC Class Codes: G09B 9/56 Simulation of sonar

Abstract

A visual display system and method according to the present invention includes an inset image generator for producing video signals representative of a plurality of inset images and an inset image projection means for generating a plurality of inset images, each having a smaller size and a higher resolution than a background image, in response to the video signals. The inset image projection means includes an inset image projector having a number of video lines and dividing means for dividing the plurality of video lines into a number of subraster blocks, each of which can generate an inset image. Each subraster block is individually positioned by deflection means such that the high resolution of inset images can be individually positioned relative to the background image. In addition, the visual display system and method includes an inset image processor including allocation means for assigning the video signals representative of each individual inset image to an individual subraster block and, in some embodiments, assigning the video signals based upon a predetermined priority allocation criteria such that only predetermined ones of the inset images are displayed.

Claims

1. A visual display system comprising:

background image projection means for generating a background image having a predetermined size and resolution;

inset image generation means for producing video signals representative of a plurality of inset images;

inset image projection means, responsive to said inset image generation means, for generating a plurality of inset images, each having a smaller size and a higher resolution than the background image, in response to the video signals produced by said inset image generation means, said inset image projection means including;

an inset image projector having a plurality of video lines; and

dividing means for dividing the plurality of video lines into a plurality of subraster blocks wherein each subraster block can generate an inset image; and

inset image processing means, responsive to said inset image generation means, for controlling the generation of inset images by said inset image projection means, said inset image processing means including;

allocation means for assigning the video signals representative of each individual inset image to an individual subraster blocks of said inset image projector; and

deflection means, responsive to said allocation means, for producing positioning signals corresponding to the individual positions of each of the subraster blocks to which an inset image is assigned by said allocation means relative to the background image.

2. A visual display system according to claim 1 wherein each video line is comprised of a predetermined number of pixels, and wherein said inset image projection means further comprises converging means for reducing the size of the pixels such that the resulting inset image has a smaller size and higher resolution than the background image.

3. A visual display system according to claim 1 further comprising a plurality of display screens, responsive to said background image projection means and said inset image projection means, for displaying the background image and the plurality of inset images.

4. A visual display system according to claim 3 wherein said inset image projection means further comprises a plurality of inset image projectors and associated dividing means, wherein at least one inset image projector is associated with each screen.

5. A visual display system according to claim 4 wherein said inset image processing means further comprises control means for enabling only one of said plurality of inset image projectors such that only the one enabled inset image projector generates an inset image for display on said associated screen in response to the video signals produced by said inset image projection means.

6. A visual display system according to claim 4 wherein said inset image processing means further comprises interleaving means, responsive to said deflection means, for generating a first inset image with a first inset image projector for display on an associated first screen while simultaneously positioning a subraster block to which a second inset image is assigned for subsequent display by a second inset image projector on an associated second screen.

7. A visual display system according to claim 1 wherein said inset image projection means further comprises blanking means, responsive to said deflection means, for blanking said inset image projector while a subraster block is positioned relative to the background image.

8. A visual display system according to claim 1 wherein said inset image projection means also produces a periodic video synchronization signal and wherein the visual display system further comprises synchronization means, responsive to periodic video synchronization signals, for synchronizing the generation of the background image and the generation of the plurality of inset images.

9. A visual display system according to claim 1 wherein said dividing means divides the plurality of video lines into a predetermined number of subraster blocks, each subraster block comprised of a predetermined number of video lines of said inset image projector, and wherein said allocation means includes prioritizing means for assigning a priority to each inset image based upon a predetermined priority allocation criteria such that only the number of inset images equal to the predetermined number of subraster blocks which have the highest priorities are assigned to an individual subraster block.

10. A visual display system according to claim 1 wherein said deflection means comprises means for tracking the line-of-sight of an operator of the visual display system such that at least one inset image is positioned in the line-of-sight of the viewer.

11. A flight simulation system comprising:

background image projection means for generating a background image having a predetermined size and resolution;

inset image generation means for producing video signals representative of a plurality of inset images;

inset image projection means, responsive to said inset image generation means, for generating a plurality of inset images, each having a smaller size and a higher resolution than the background image, in response to the video signals produced by said inset image generation means, said inset image projection means including;

an inset image projector having a plurality of video lines, each video line being comprised of a predetermined number of pixels;

converging means for reducing the size of the pixels such that the resulting inset image has a smaller size and higher resolution than the background image;

dividing means for dividing the plurality of video lines into a plurality of subraster blocks wherein each subraster block can generate an inset image; and

inset image processing means, responsive to said inset image generation means, for controlling the generation of inset images by said inset image projection means, said inset image processing means including;

allocation means for assigning the video signals representative of each individual inset image to an individual subraster blocks of said inset image projector; and

deflection means, responsive to said allocation means, for producing positioning signals corresponding to the individual positions of each of the subraster blocks to which an inset image is assigned by said allocation means relative to the background image.

12. A flight simulation system according to claim 11 further comprising a plurality of display screens, responsive to said background image projection means and said inset image projection means, for displaying the background image and the plurality of inset images, and wherein said inset image projection means comprises

a plurality of inset image projectors and associated dividing means, wherein at least one inset image projector is associated with each display screen.

13. A flight simulation system according to claim 12 further comprising control means for enabling only one of said plurality of inset image projectors such that only the one enabled projector generates an inset image for display on said associated display screen in response to the video signals produced by said inset image projection means.

14. A flight simulation system according to claim 12 wherein said inset image processing means further comprises interleaving means, responsive to said deflection means, for generating a first inset image with a first inset image projector for display on an associated first screen while simultaneously positioning a subraster block to which a second inset image is assigned for subsequent display by a second inset image projector on an associated second screen.

15. A flight simulation system according to claim 11 wherein said inset image projection means further comprises blanking means, responsive to said deflection means, for blanking said inset image projector while a subraster block is positioned relative to the background image.

16. A flight simulation system according to claim 11 wherein said dividing means divides the plurality of video lines into a predetermined number of subraster blocks, each subraster block comprised of a predetermined number of video lines of said inset image projector, and wherein said allocation means includes prioritizing means for assigning a priority to each inset image based upon a predetermined priority allocation criteria such that only the number of inset images equal to the predetermined number of subraster blocks which have the highest priorities are assigned to an individual subraster block.

17. A method of displaying a composite video image having a plurality of inset images and a background image wherein the inset images are smaller and of a higher resolution than the background image, the method comprising the steps of:

generating a background image having a predetermined size and resolution;

producing video signals representative of a plurality of inset images, each having a smaller size and a higher resolution than the background image;

dividing the plurality of video lines of an inset image projector into a plurality of subraster blocks;

assigning the video signals representative of each individual inset image to an individual subraster block;

generating a plurality of inset images in response to the assigned video signals wherein one inset image is generated by each subraster block; and

deflecting each individual subraster blocks relative to the background image.

18. A method according to claim 17 wherein each video line is comprised of a predetermined number of pixels and wherein the method further comprises the step of reducing the size of the pixels such that the resulting inset image has a smaller size and a higher resolution than the background image.

19. A method according to claim 17 wherein the plurality of inset images are generated by a plurality of inset image projectors, and wherein the method further comprises the step of enabling only one of the plurality of inset image projectors such that only the one enabled inset image projector generates an inset image in response to the video signals.

20. A method according to claim 19 further comprising the steps of:

generating a first inset image with a first inset image projector for displaying on the first associated display screen; and

simultaneously positioning a subraster block to which a second inset image is assigned for subsequent display by a second inset image projector on an associated second display screen.

21. A method according to claim 17 further comprising the step of blanking the inset image projector while a subraster block is positioned relative to the background image.

22. A method according to claim 17 further comprising the step of synchronizing the generation of the plurality of inset images to the generation of the background image.

23. A method according to claim 17 further comprising the steps of:

dividing the plurality of video lines into a predetermined number of subraster blocks, each subraster block being comprised of a predetermined number of video lines of the projector; and

assigning a priority to each inset image based upon a predetermined priority allocation criteria such that only the number of inset images equal to the predetermined number of subraster blocks which have the highest priorities are assigned to an individual subraster block.