DISPLAY SYSTEM WITH INTERPRETABLE PATTERN DETECTION

• US 20040085522A1
• Filed: 10/31/2002
• Published: 05/06/2004
• Est. Priority Date: 10/31/2002
• Status: Active Grant

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Honig, Howard L., Weng, Jian-gang
• Granted Patent: US 6,979,087 B2
• Time in Patent Office: Days
• US Class Current: 353/121
• CPC Class Codes: G03B 21/26 Projecting separately subsidiary matter simultaneously with main image

Abstract

A method of controlling a display system includes projecting an image onto a surface, projecting a control beam onto the surface, tracing an interpretable pattern with the control beam, detecting the interpretable pattern, and correlating the interpretable pattern with a predefined command.

Claims

1. A method of controlling a display system, comprising:

projecting an image onto a surface;

projecting a control beam onto the surface;

tracing an interpretable pattern with the control beam;

detecting the interpretable pattern; and

correlating the interpretable pattern with a predefined command.

2. The method of claim 1, further comprising executing the predefined command.

3. The method of claim 2, where executing the predefined command includes modifying a presentation.

4. The method of claim 3, where modifying the presentation includes at least one of highlighting a portion of the projected image and adding text to the projected image.

5. The method of claim 1, where the control beam is projected with a light pointer.

6. The method of claim 5, where projecting the control beam includes modifying one or more optical properties of a projected spot.

7. The method of claim 6, where modifying one or more optical properties includes modifying at least one of the intensity and the frequency of the projected control beam.

8. The method of claim 1, where the interpretable pattern is detected using an image sensor.

9. The method of claim 1, where projecting the control beam includes directing the projected image along an optical pathway, and detecting the interpretable pattern includes directing a reflection of the projected image along the optical pathway.

10. The method of claim 1, where correlating the interpretable pattern with the predefined command includes interpreting the interpretable pattern.

11. The method of claim 10, where correlating the interpretable pattern with the predefined command includes comparing the interpreted pattern with a plurality of predefined stroke patterns.

12. The method of claim 11, where correlating the interpretable pattern with the predefined command further includes selecting a best matching predefined stroke pattern from the plurality of predefined stroke patterns.

13. The method of claim 12, further comprising executing the predefined command corresponding to the best matching predefined stroke pattern.

14. A display device, comprising:

a projector configured to project an image onto a display surface;

a control projector configured to project a movable spot on the display surface;

a sensor configured to detect a pattern traced by the movable spot on the display surface; and

a processor, coupled to the sensor, configured to correlate the traced pattern with a predefined command.

15. The display device of claim 14, where the processor is configured to modify a presentation according to the predefined command.

16. The display device of claim 15, further comprising a memory connected to the processor, where the memory includes a database associating a plurality of predefined commands with corresponding traced patterns.

17. The display device of claim 14, where the projector is a digital projector.

18. The display device of claim 14, where the projector is an LCD projector or micromirror projector.

19. The display device of claim 14, where the control projector is a light pointer.

20. The display device of claim 14, where the sensor includes a CCD camera.

21. A display device, comprising:

a projector configured to project an image onto a display surface;

a control projector configured to project a spot on the display surface;

an image sensor configured to detect movement of the spot on the display surface;

a processor, coupled to the image sensor, configured to correlate the movement of the spot with a predefined command.

22. The display device of claim 21, where the image sensor is incorporated within the projector.

23. The display device of claim 22, where the projector and the image sensor share an optical path.

24. The display device of claim 21, where the control projector is a light pen.

25. The display device of claim 21, where the control projector includes an activating mechanism for projecting the spot.

26. A display system, comprising:

means for projecting an image onto a surface;

means for projecting a control light beam on the surface;

means for detecting a movement pattern of the light beam;

means for interpreting the movement pattern of the light beam;

means for correlating the movement pattern with a predefined command.

27. The display system of claim 26, further comprising means for executing the predefined command.

28. The display system of claim 26, further comprising means for differentiating the control light beam from a pointer beam.