Touch sensing with touch down and lift off sensitivity

Details Touch sensing with touch down and lift off sensitivity Touch sensing with touch down and lift off sensitivity

2007-10-02

2007-10-02

Hjerpe, Richard (Department: 2629)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

C345S160000, C345S169000, C345S177000, C178S018010, C178S018030, C178S018040

Reexamination Certificate

active

10750291

ABSTRACT:
A touch sensing device includes a plurality of sensors and an emitting transducer coupled to a touch panel. The transducer induces bending waves in the touch panel. The sensors sense bending waves in the touch panel and generate a bending wave signal responsive to the sensed bending waves. A controller identifies an untouched condition signal responsive to the induced bending waves. The controller compares the untouched condition signal to the bending wave signal, and detects a touch on the touch panel based on the comparison.

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patent: 2003/0217873 (2003-11-01), Paradiso et al.
patent: WO 2001/48684 (2001-07-01), None
patent: WO 2003/005292 (2003-01-01), None
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U.S. Appl. No. 10/683,342, filed Oct. 10, 2003, Wake-On-Touch for Vibration Sensing Touch Input Devices.

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