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Computing Surfaces a platform for scalable interactive displays

Computing Surfaces a platform for scalable interactive displays. Alban Rrustemi. Microsoft Research Cambridge 30-June-2009. Overview. Information displays Emerging display technologies Display resolution Technology limitations Computing surfaces A distributed architecture Implications

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Computing Surfaces a platform for scalable interactive displays

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  1. Computing Surfacesa platform for scalable interactive displays Alban Rrustemi Microsoft Research Cambridge 30-June-2009

  2. Overview • Information displays • Emerging display technologies • Display resolution • Technology limitations • Computing surfaces • A distributed architecture • Implications • Conclusions

  3. Information displays • Visual broadcasting of information

  4. Information displays • LCD – ubiquitous

  5. Information displays • LCD – ubiquitous • Sensing • New applications

  6. Emerging display technologies • OLED (Organic LED) • Higher refresh rate (due to faster response times) • Higher contrast (e.g. 1,000,000:1) • Improved colour reproduction • Really thin – (e.g. Sony XEL-1 is just 3mm thick) • Much wider viewing angle (almost 180 degrees) • Lower power consumption • Can be made flexible and/or transparent • Some OLED technologies are soluble

  7. Emerging display technologies • Reflective (e-ink) • E-readers • Other devices

  8. Emerging display technologies • Flexible displays • More research in supporting technologies • TFT backplanes • Encapsulation materials • Superior manufacturing efficiency

  9. Motivation – large interactive displays • A new spectrum of opportunities • Thin, flexible, interactive display surfaces • Scalable?

  10. Display resolution • Pixel density • TVs ~60PPI • Monitor screens ~100PPI • Smartphones, currently up to 300PPI • Assuming 100PPI => 4k×4k / m2 • Current max monitor resolution: 3840 X 2400 • WQUXGA • Resolution standards • Are becoming absurd

  11. Technology limitations • Current solutions provide limited scalability • Limitations apply to all existing display systems • A problem of communication management!

  12. Tiling

  13. Computing surfaces • A distributed architecture • Tile structure

  14. 3x3 network Tile components Display: 17” LCD Altera DE2 FPGA Nios II processor Radix-5 packet switched virtual channel network router Computing surfaces – a prototype

  15. Computing surfaces • A versatile architecture • Implications: • Distributed output • Distributed input • Need for time synchronisation

  16. Distributed output • Direct manipulation with display content is needed • 2D transformations • A centralised approach becomes infeasible • Alternative: distributed 2D transformations

  17. Distributing input • Gesture recognition • A distributed architecture brings new issues to be resolved • Unistrokes:

  18. Time synchronisation • Needed for: • coordination processes • distributed video playback • interactive games • A distributed algorithm

  19. Conclusions and summary • Emerging display technologies will enable FP displays ubiquity • Resolution scalability problems will escalate • Distributed architectures become necessary • Computing surfaces • Distributed 2D transformation of images • Distributed gesture recognition • Time synchronisation • Questions?

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