Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Reexamination Certificate
2005-11-29
2005-11-29
Shankar, Vijay (Department: 2673)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
C345S174000
Reexamination Certificate
active
06970160
ABSTRACT:
This invention is directed to a lattice touch-sensing system for detecting a position of a touch on a touch-sensitive surface. The lattice touch-sensing system may include two capacitive sensing layers, separated by an insulating material, where each layer consists of substantially parallel conducting elements, and the conducting elements of the two sensing layers are substantially orthogonal to each other. Each element may comprise a series of diamond shaped patches that are connected together with narrow conductive rectangular strips. Each conducting element of a given sensing layer is electrically connected at one or both ends to a lead line of a corresponding set of lead lines. A control circuit may also be included to provide an excitation signal to both sets of conducting elements through the corresponding sets of lead lines, to receive sensing signals generated by sensor elements when a touch on the surface occurs, and to determine a position of the touch based on the position of the affected bars in each layer.
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U.S. Appl. No. 09/998,614, filed Nov. 30, 2001, System and Method for Locating a Touch on a Capacitive Touch Screen.
U.S. Appl. No. 10/176,564, filed Jun. 21, 2002, Capacitive Touch Sensor Architecture with Unique Sensor Bar Addressing.
Badaye Massoud
Lim Brian G.
Mulligan Roger C.
Wong Alex K.
3M Innovative Properties Company
Dharia Prabodh
Pechman Robert J.
Shankar Vijay
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