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Clevertex - Grado Zero Espace Srl

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The American-based company Logitech Inc. manufactures a soft-touch KeyCase TM keyboard that can<br />

wrap around a personal digital assistant (PDA) for storage and protection. The keyboard is lightweight<br />

and made out of textile. There is no more use of stylus as the keyboard puts the most popular editing<br />

functions at the fingertips and one-touch keys give the user instant access to his/her most used<br />

applications. The pressure-sensitive scroller enables quick navigation [39].<br />

Fig. 11 Soft-touch KeyCaseTM by Logitech [39]<br />

The U.S. company Pressure Profile Systems, Inc. designs, develops and manufactures high<br />

performance multi-element pressure and tactile sensing systems, called Tactarray and ConTacts.<br />

Fig. 12 PPS sensor design<br />

TactArray and PresStrip sensors use overlapping electrodes to form arrays of sensing elements.<br />

Elements are formed at each point where a Drive strip overlaps a Sense strip. By selectively<br />

measuring the capacitance between a particular Drive and Sense electrode, our proprietary<br />

electronics can scan through an array of sensing elements at high speed [40].<br />

20

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