Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Reexamination Certificate
2007-09-04
2007-09-04
Patel, Nitin I. (Department: 2629)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
C345S156000
Reexamination Certificate
active
10454003
ABSTRACT:
A circuit for an acoustic wave switch or sensor having a resonant acoustic wave cavity detects a touch or sensed event using a time domain approach. The circuit includes a controller that drives an acoustic wave transducer to generate a resonant acoustic wave in the acoustic wave cavity during a first portion of a sampling cycle. In a second portion of the sampling cycle, the controller monitors the time that it takes for the acoustic wave signal from the transducer to decay to a predetermined level. Based on the decay time, the controller detects a sensed event, such as a touch on the acoustic wave switch/sensor.
REFERENCES:
patent: 4645870 (1987-02-01), Adler
patent: 4700176 (1987-10-01), Adler
patent: 5149986 (1992-09-01), Jalbert
patent: 5177327 (1993-01-01), Knowles
patent: 5334805 (1994-08-01), Knowles et al.
patent: 5451723 (1995-09-01), Huang et al.
patent: 5573077 (1996-11-01), Knowles
patent: 5591945 (1997-01-01), Kent
patent: 5673041 (1997-09-01), Chatigny et al.
patent: 5813280 (1998-09-01), Johnson et al.
patent: 5856820 (1999-01-01), Weigers et al.
patent: 5986224 (1999-11-01), Kent
patent: 6078315 (2000-06-01), Huang
patent: 6085576 (2000-07-01), Sunshine et al.
patent: 6087599 (2000-07-01), Knowles
patent: 6091406 (2000-07-01), Kambara et al.
patent: 6366277 (2002-04-01), Armstrong
patent: 6369806 (2002-04-01), Endo et al.
patent: 6441809 (2002-08-01), Kent et al.
patent: 6473075 (2002-10-01), Gomes et al.
patent: 2003/0038789 (2003-02-01), Nakazawa et al.
patent: 2004/0178998 (2004-09-01), Sharp et al.
Bremigan, III Charles F.
Kalmus Chris
Knowles Terence J.
Wehrer Wayne J.
Illinois Tool Works Inc.
McAndrews Held & Malloy Ltd.
Patel Nitin I.
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