Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Patent
1994-12-06
1997-06-10
Powell, Mark R.
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
345177, 345179, 178 18, G09G 302
Patent
active
056380933
ABSTRACT:
A touch panel input device is provide with a panel capable of propagating surface acoustic waves and in which surface acoustic wave attenuation is caused by a object in contact with said panel. An emission circuit outputs a surface acoustic wave drive; and an emission transducer emits surface acoustic waves in the panel in accordance with the surface wave drive outputted from said emission circuit. A reception transducer receives surface acoustic waves in the panel and outputs a received acoustic signal. A reception circuit receives the received acoustic wave signal from the reception transducer to detect a position at which the received acoustic wave is attenuated as indicative of a position that the object contacts the panel. A controller controls the emission circuit and the reception circuit, and comprises a processor for computing a width of the contact by the object on the panel in accordance with a waveform detected by the reception circuit. A judging circuit distinguishes a type of object in contact based on the width obtained by the processor.
REFERENCES:
patent: Re33151 (1990-01-01), Adler
patent: 4644100 (1987-02-01), Brenner et al.
patent: 4700176 (1987-10-01), Adler
patent: 4746914 (1988-05-01), Adler
patent: 4791416 (1988-12-01), Adler
patent: 4859996 (1989-08-01), Adler et al.
patent: 4880665 (1989-11-01), Adler et al.
patent: 5144594 (1992-09-01), Gilchrist
patent: 5177327 (1993-01-01), Knowles
patent: 5247137 (1993-09-01), Epperson
patent: 5260521 (1993-11-01), Knowles
patent: 5272470 (1993-12-01), Zetts
patent: 5329070 (1994-07-01), Knowles
patent: 5334805 (1994-08-01), Knowles et al.
patent: 5380959 (1995-01-01), Knowles
patent: 5401916 (1995-03-01), Crooks
patent: 5402151 (1995-03-01), Duwaer
patent: 5404458 (1995-04-01), Zetts
patent: 5434371 (1995-07-01), Brooks
patent: 5534893 (1996-07-01), Hansen, Jr. et al.
Kaburagi Chiharu
Takahashi Eizo
Janofsky Eric B.
Johnson W. Glen
Kovalick Vincent E.
Powell Mark R.
Seiko Epson Corporation
LandOfFree
Touch panel input device and control method thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Touch panel input device and control method thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Touch panel input device and control method thereof will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-768558