THE HUMAN BODY AS TOUCH SCREENTHE HUMAN BODY AS TOUCH SCREEN

IntroductionIntroduction

Skinput allows the user to simply tap Skinput allows the user to simply tap their skin in order to control audio their skin in order to control audio devices, play games, make phone calls.devices, play games, make phone calls.

It uses the sensors to determine where the It uses the sensors to determine where the user taps on their skin.user taps on their skin.

What is SkinputWhat is Skinput

Skinput turns the body into a touch Skinput turns the body into a touch screen surface.screen surface.

Skinput is an “input technology” mainly Skinput is an “input technology” mainly used to control mobile devices.used to control mobile devices.

Skinput is named because it uses the Skinput is named because it uses the human skin as an input devices or human skin as an input devices or tracking surface.tracking surface.

Principle of SkinputPrinciple of Skinput

It listens to vibrations in your body.It listens to vibrations in your body. Skinput also responds to the various hand Skinput also responds to the various hand

gestures.gestures. The arm is an instrument.The arm is an instrument.

Technology UsedTechnology Used

Skinput, the system is a combination of Skinput, the system is a combination of two technologies: the ability to detect the two technologies: the ability to detect the ultra low frequency sound and the ‘pico’ ultra low frequency sound and the ‘pico’ projectors.projectors.

Pico projector applies the use of projector Pico projector applies the use of projector in a hand held device.in a hand held device.

An acoustic detector detects the ultra low An acoustic detector detects the ultra low frequency.frequency.

Pico ProjectorPico Projector

It is also known as pocket projector or It is also known as pocket projector or mobile projector.mobile projector.

The system comprises three main parts:The system comprises three main parts: The Laser light sourceThe Laser light source The Combiner opticsThe Combiner optics The Scanning mirrorThe Scanning mirror

Bio-AcousticsBio-Acoustics

Study of sound waves inside living body.Study of sound waves inside living body. When a finger taps the skin, several When a finger taps the skin, several

distinct forms of acoustic energy are distinct forms of acoustic energy are produced.produced.

Longitudinal WavesLongitudinal Waves Transverse WavesTransverse Waves

Longitudinal Waves:Longitudinal Waves:

These waves travel through the rigid These waves travel through the rigid tissues of the arm, exciting the waves, tissues of the arm, exciting the waves, which can respond to the mechanical which can respond to the mechanical vibrations by tapping on a rigid body.vibrations by tapping on a rigid body.

TransverseWaves:TransverseWaves:Tapping on soft regions of the arm Tapping on soft regions of the arm creates higher amplitude transverse creates higher amplitude transverse waves.waves.

Bio-Acoustics: Sensing Bio-Acoustics: Sensing

These signals need to be sensed and These signals need to be sensed and worked upon.worked upon.

This is done by wearing the wave sensor This is done by wearing the wave sensor arm band.arm band.

Percent AccuracyPercent Accuracy

AdvantagesAdvantages

No need to interact with the gadget No need to interact with the gadget directly.directly.

Don’t have to worry about keypad.Don’t have to worry about keypad. People with larger fingers get trouble in People with larger fingers get trouble in

navigating tiny buttons and keypads on navigating tiny buttons and keypads on mobile phones. With skinput this problem mobile phones. With skinput this problem disappears.disappears.

ApplicationsApplications

MobileMobile GamingGaming I-podsI-pods An aid to paralyzed persons.An aid to paralyzed persons.

Future ImplicationsFuture Implications

With small sized Pico-projectors, Skinput With small sized Pico-projectors, Skinput oriented systems, are an emerging trend.oriented systems, are an emerging trend.

Research is carried out for smaller wrist Research is carried out for smaller wrist watch sized sensor arm band.watch sized sensor arm band.

ConclusionConclusion

This approach is to appropriate the This approach is to appropriate the human body as an input interface.human body as an input interface.

It described a wearable bio-acoustic array It described a wearable bio-acoustic array used to detect and localize finger tap on used to detect and localize finger tap on the hand and the forearm.the hand and the forearm.

This system performs well even when the This system performs well even when the body is in motion.body is in motion.

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