TiltText: Using Tilt for Text Input on Mobile Phones March 13, 2006Posted by reto wettach in physical interaction design.
In this research paper, Daniel Wigdor and Ravin Balakrishnan show how text input can be improved by using tilting as an additional input source – next to the number keys. They are proposing a system, where the abiguity of mulitple letters on one number key are being replaced by a selecting mechanism based on tilt:
Tilting the phone to the left selects the first letter of the key, away from the body the second, to the right the third, and, if
present, towards the body the fourth. Pressing a key without tilting results in entering the numeric value of the key.
I am wondering, how well this system could work with Ivan Poupyrev’s TOUCH-ENGINE.
A good general overview on text input for mobile devices (incl. Quikwriting) from 2002 can be found here.
Just for the sake of completeness: Fastap by DIGITwireless is a extended keyboard, where at the borders of the tradional numeric keyboard additional buttons can be placed, e.g. for text input or for music playing functions.