Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Reexamination Certificate
2008-01-29
2008-01-29
Lefkowitz, Sumati (Department: 2629)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
C257S254000, C310S31300R, C310S31300R, C310S31300R, C310S31300R, C345S173000
Reexamination Certificate
active
07324096
ABSTRACT:
A plurality of excitation elements, each including an IDT and a piezoelectric film, for exciting, respectively, surface acoustic waves, each having a unique center frequency, are formed on one end of a non-piezoelectric substrate, a plurality of receiving elements, each including an IDT and a piezoelectric film, for receiving, respectively, surface acoustic waves, each having a unique center frequency, are formed on the other end of the non-piezoelectric substrate to face the excitation elements, respectively, the center frequencies of the IDTs of the facing excitation element and receiving element are equal, the center frequencies of the IDTs of the excitation elements next to each other are different, and surface acoustic waves are propagated across the non-piezoelectric substrate, between the facing excitation elements and receiving elements so as to detect the position of an object in contact with the non-piezoelectric substrate, based on received results in the receiving elements.
REFERENCES:
patent: 4775961 (1988-10-01), Capek et al.
patent: 5638093 (1997-06-01), Takahashi et al.
patent: 5717434 (1998-02-01), Toda
patent: 5838088 (1998-11-01), Toda
patent: 39 19 463 (1989-12-01), None
patent: 55-108033 (1980-08-01), None
patent: 6-43995 (1994-02-01), None
patent: 6-75688 (1994-03-01), None
patent: 6-75689 (1994-03-01), None
patent: 6-149458 (1994-05-01), None
patent: 6-161643 (1994-06-01), None
patent: 06-348396 (1994-12-01), None
Japanese Office Action dated Nov. 28, 2005, corresponding to Japanese Patent Application No. 2001-587199.
German Office Action DE 100 66 337.0-53 dated Aug. 18, 2006.
German Office Action DE 100 85 466.4-53 dated Aug. 18, 2006.
Matsuda Takashi
Nakazawa Fumihiko
Sano Satoshi
Satoh Yoshio
Beck Alexander S.
Fujitsu Limited
Lefkowitz Sumati
Westerman, Hattori, Daniels & Adrian , LLP.
LandOfFree
Touch panel device 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 device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Touch panel device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2781873