Authors
Olivier Bau Disney Research Pittsburgh, Pittsburgh, PA, USA and Université Paris-Sud, Orsay, France
Ivan Poupyrev Disney Research Pittsburgh, Pittsburgh, PA, USA
Ali Israr Disney Research Pittsburgh, Pittsburgh, PA, USA
Chris Harrison Disney Research Pittsburgh and Carnegie Mellon University, Pittsburgh, PA, USA
Proceeding
UIST '10 Proceedings of the 23nd annual ACM symposium on User interface software and technology
Summary
TeslaTouch is a touch interface that uses oscillating electric forces to create tactile feedback. It works by periodically attracting the surface of finger to the surface, changing the amount of friction based on voltage.
Hypothesis
The researchers believed this system could be used to simulate different types of surfaces dynamically.
Methods
The TeslaTouch System was created from a transparent electrode sandwiched between a glass plate and an insulator. Images were displayed using a projector. High voltages were sent to the electrode and attract the skin of the finger using electrostatic forces. Much better results were achieved if the user is grounded. The safety of the system is ensured by limiting the current possible from the power supply. Different types of signals and strengths were tested on participants and their opinions were noted in categories such as how slick the surface felt and how it felt like vibration or friction. A scale of pleasantness was also considered. First the minimum detection for a single user is determined using a step-wise learning cutoff. The main tests were between 400 and 80 cycles per second, and 115 and 85 volts.
Results
Higher frequencies rendered more "smooth" and "waxy" results, and higher voltages increased these observations. Also, compared to other vibration interfaces, this system does not generate any noise.
Conclusion
I think this system could be used for generating much more tactile sensations than mere sine-waves. I'm imagining having the system determine which direction a finger is moving and then creating a shaped wave based on the direction of the motion. This way there could be much richer types of sensations, and possibly types of sensations that may not be possible in the world.
Ivan Poupyrev Disney Research Pittsburgh, Pittsburgh, PA, USA
Ali Israr Disney Research Pittsburgh, Pittsburgh, PA, USA
Chris Harrison Disney Research Pittsburgh and Carnegie Mellon University, Pittsburgh, PA, USA
Proceeding
UIST '10 Proceedings of the 23nd annual ACM symposium on User interface software and technology
Summary
TeslaTouch is a touch interface that uses oscillating electric forces to create tactile feedback. It works by periodically attracting the surface of finger to the surface, changing the amount of friction based on voltage.
Hypothesis
The researchers believed this system could be used to simulate different types of surfaces dynamically.
Methods
The TeslaTouch System was created from a transparent electrode sandwiched between a glass plate and an insulator. Images were displayed using a projector. High voltages were sent to the electrode and attract the skin of the finger using electrostatic forces. Much better results were achieved if the user is grounded. The safety of the system is ensured by limiting the current possible from the power supply. Different types of signals and strengths were tested on participants and their opinions were noted in categories such as how slick the surface felt and how it felt like vibration or friction. A scale of pleasantness was also considered. First the minimum detection for a single user is determined using a step-wise learning cutoff. The main tests were between 400 and 80 cycles per second, and 115 and 85 volts.Results
Higher frequencies rendered more "smooth" and "waxy" results, and higher voltages increased these observations. Also, compared to other vibration interfaces, this system does not generate any noise.
Conclusion
I think this system could be used for generating much more tactile sensations than mere sine-waves. I'm imagining having the system determine which direction a finger is moving and then creating a shaped wave based on the direction of the motion. This way there could be much richer types of sensations, and possibly types of sensations that may not be possible in the world.
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