Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Reexamination Certificate
2006-07-11
2006-07-11
Shalwala, Bipin (Department: 2677)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
C345S038000, C345S158000, C345S174000, C345S176000
Reexamination Certificate
active
07075521
ABSTRACT:
Input position is accurately detected. In an x-detection period of a non-display period, a source drive circuit simultaneously applies to all signal wiring lines a pulse of a peak value proportional to a distance from a gate drive circuit. A coordinate detection circuit obtains an x-coordinate on the basis of a voltage induced at a pen corresponding to the peak value (x-coordinate) of the applied pulse. In a y-detection period, a pulse generation circuit applies one pulse to a common line. The pen detects a potential variation in amplitude proportional to a distance (y-coordinate) from the source drive circuit, generated approximately simultaneously on all the signal wiring lines via a capacitance. The coordinate detection circuit obtains the y-coordinate similarly to the case of x-coordinate detection.
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Fujiwara Koji
Ichioka Hideki
Inoue Naoto
Tanaka Keiichi
Yamamoto Tomohiko
Nixon & Vanderhye P.C.
Shalwala Bipin
Shapiro Leonid
Sharp Kabushiki Kaisha
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