1. THE HUMAN BODY AS TOUCH SCREEN

2. Introduction
 Skinput allows the user to simply tap
their skin in order to control audio
devices, play games, make phone calls.
 It uses the sensors to determine where the
user taps on their skin.

3. What is Skinput
 Skinput turns the body into a touch
screen surface.
 Skinput is an “input technology” mainly
used to control mobile devices.
 Skinput is named because it uses the
human skin as an input devices or
tracking surface.

4. Principle of Skinput
 It listens to vibrations in your body.
 Skinput also responds to the various hand
gestures.
 The arm is an instrument.

5. Technology Used
 Skinput, the system is a combination of
two technologies: the ability to detect the
ultra low frequency sound and the ‘pico’
projectors.
 Pico projector applies the use of projector
in a hand held device.
 An acoustic detector detects the ultra low
frequency.

7. Pico Projector
 It is also known as pocket projector or
mobile projector.
 The system comprises three main parts:
 The Laser light source
 The Combiner optics
 The Scanning mirror

8. Bio-Acoustics
 Study of sound waves inside living body.
 When a finger taps the skin, several
distinct forms of acoustic energy are
produced.
 Longitudinal Waves
 Transverse Waves

9. Longitudinal Waves:
These waves travel through the rigid
tissues of the arm, exciting the waves,
which can respond to the mechanical
vibrations by tapping on a rigid body.
TransverseWaves:
Tapping on soft regions of the arm
creates higher amplitude transverse
waves.

11. Bio-Acoustics: Sensing
 These signals need to be sensed and
worked upon.
 This is done by wearing the wave sensor
arm band.

13. Percent Accuracy

14. Advantages
 No need to interact with the gadget
directly.
 Don’t have to worry about keypad.
 People with larger fingers get trouble in
navigating tiny buttons and keypads on
mobile phones. With skinput this problem
disappears.

15. Applications
 Mobile
 Gaming
 I-pods
 An aid to paralyzed persons.

17. Future Implications
 With small sized Pico-projectors, Skinput
oriented systems, are an emerging trend.
 Research is carried out for smaller wrist
watch sized sensor arm band.

18. Conclusion
 This approach is to appropriate the
human body as an input interface.
 It described a wearable bio-acoustic array
used to detect and localize finger tap on
the hand and the forearm.
 This system performs well even when the
body is in motion.

19. THANKYOU

20. QUERIES