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Smart Light –Ultra High Speed Projector for Spatial Multiplexing Optical Transmission

Smart Light –Ultra High Speed Projector for Spatial Multiplexing Optical Transmission. Hideaki NII, Maki SUGIMOTO, Masahiko INAMI The University of Erectro-Communications, JAPAN. Table of contents. Introduction Camera vs. Projector Comparison of characteristics

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Smart Light –Ultra High Speed Projector for Spatial Multiplexing Optical Transmission

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  1. Smart Light –Ultra High Speed Projector for Spatial Multiplexing Optical Transmission Hideaki NII, Maki SUGIMOTO, Masahiko INAMI The University of Erectro-Communications, JAPAN

  2. Table of contents • Introduction • Camera vs. Projector • Comparison of characteristics • Smart light concept (next to projector) • Preliminary experiment • The design of LED projector • Experiment of LED projector • Conclusion

  3. Projector vs. video camera Camera Projector • Acquire images. • Acquire information with images • Project images • Project information with images. A projector is the dual of a camera. R Raskar, iLamps,2003

  4. Basic concept of image-processing

  5. Basic concept of projector image processing

  6. Projector-Based Tracking System Demonstrated at SIGGRAPH2004

  7. Augmented Coliseum To be Demonstrated at SIGGRAPH2005

  8. A compact battery-less information terminal (CoBIT) for location-based support systems CoBIT can project various kinds of information according to a position. But LED light can project only single sound. Takuichi Nishimura, SPIE, number 4863B-12, 2002

  9. RFIG Lamp • Use RFID and a portable projector to display RFID tag’s location directly. http://www.merl.com/people/raskar/Sig04/

  10. Smart light concept • Use projector and camera to communicate to detached device. • To increase band-width, use space division .

  11. Why LED projector ? Most high-speed pixel :LED

  12. Preliminary experiment Detector Experimental setup Result

  13. Experiment of LED projector 50mm 300mm Positional relationship Experimental setup To check the signal separation quality. We prepare this experimental set. Result

  14. LED projector • Can project small image for human’s eye • Can project invisible information (sound/video stream) . • Different data stream to each pixel. • Projection pattern can change in real time. • Subject can select the point by the detector and get data stream with no time delay.

  15. Components of LED projector

  16. Experiment of LED projector

  17. Experiment of LED projector LED projector and signal generator Photo detector and headset

  18. Characteristic of this experiment • Subject can see bright area and dark area on the screen. • The bright area has music stream for the headphone, and the dark area has noise. • Subject can select the point by the detector and hear a sound stream with no time delay. • The bright area has move in rhythm of the music. • As the result, subject can move a detector in rhythm of music and listen a music continuously.

  19. Conclusion • Concept of “Smart light”. • Fundamental experiment of LED projector. • Design of LED projector. • The experiment of LED projector.

  20. Thank you

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