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L3PT

L3PT. Large Portable Projected Peripheral Touchscreen Team Jackson Brian Gosselin Greg Langlois Nick Jacek Dmitry Kovalenkov. Preliminary Design Review. Tablet PCs . S ingle user Small workspace 10’’ diagonal screen Stand alone device Portable Multi touch capabilities

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L3PT

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  1. L3PT Large Portable Projected Peripheral Touchscreen Team Jackson Brian Gosselin Greg Langlois Nick Jacek Dmitry Kovalenkov Preliminary Design Review

  2. Tablet PCs • Single user • Small workspace • 10’’ diagonal screen • Stand alone device • Portable • Multi touch capabilities • Price $500-$1000

  3. Smartboard • Large workspace • Single / Multi user • Multi touch capabilities • Not portable • Expensive, > $1,000

  4. Light Blue Optics: Light Touch • Small interactive screen • 10.1’’ diagonal • Projected on flat surfaces • Multi touch capabilities • Stand alone device • Portable • Not commercially available

  5. Desired Specifications • Affordable • Portable • Large workspace • Single / Multi user • Multi touch capabilities None of these devices meet all of the above specifications.

  6. Engineering solution.. L3PT ! • Affordable • Portable • Large interactive screen • Projected on flat surfaces • Goal 30-40’’ diagonal screen • Single / Multi user • Multi touch capabilities • Windows 7 peripheral

  7. Engineering solution.. L3PT ! Projector IR Camera Projected Interactive Screen USB Connection Microprocessor (Image Processing)

  8. Block Diagram Computer Projector Multi touch driver IR camera Microprocessor Image processing IR emitted light

  9. FAVI Mini Pocket Projector (E1-LED-PICO) • Resolution 640x480 • USB connection • 4.5’’ x 2.4’’ x 1’’ • Weight: 4 ounces(w/o batteries) • Displays up to 80’’ • Price $200

  10. Camera with IR Filter • Resolution 1300x1040 • I2C interface • Change color filter to IR filter

  11. Microprocessor • ATmega328P • Using Arduino for prototyping code • PDIP28 package with boot loader • Tasks: • Camera interaction • Image processing

  12. Detection Methods (Option 1) • Layer of IR light • Object that breaks the plane reflects light • Self contained • Possible shadowing IR light

  13. Detection Methods (Option 2) • Pens with IR LEDs • Switch turns on LED • Reduced shadowing • LED placement? • Still portable?

  14. Image Processing • Brightest areas = touches • Scale touch locations to PC coordinates • Send coordinates to computer

  15. Windows 7 Driver • Setup calibration • Multi touch interface • Send touch coordinates to OS

  16. Individual Roles • Brian • Team Lead / Webmaster • Physical assembly • USB communication • Dmitry • Camera / IR filtering • Integration of parts • Nick • Driver package • Integrating multi-touch • Greg • Image processing • Position detection

  17. Budget

  18. Potential Challenges • Shadowing • Delay • Position of projector and camera • Alignment (Projector vs. camera) • Choice of detection method

  19. MDR • Choose detection method • Position of projector and camera • Use camera to detect infrared light • Extract coordinates of touch locations

  20. Gantt Chart

  21. Conclusion L3PT • Interactive product (Good for demo) • Mix of software and hardware • Single / Multi user • Multi touch capabilities • Feasible for SDP cost and time constraints

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