Craig Cordeiro

7254775, Aug 7, 2007

Oct 3, 2001

09/970474

Bernard O. Geaghan - Salem MA, US
Robert S. Moshrefzadeh - Oakdale MN, US
Craig A. Cordeiro - Westford MA, US
Edward S. Hagermoser - Lancaster MA, US
James J. Hart - Georgetown MA, US
Paul M. Hatin - Londonderry NH, US
Karl P. Hauck - Somerville MA, US
Stephen C. Schulz - Lee NH, US
Gordon F. Taylor - Bolton MA, US

3M Innovative Properties Company - Saint Paul MN

G06F 9/00

715701, 345173, 345179, 178 1801, 715702, 715863, 715856, 715857, 715858, 715859, 715860, 715861, 715862

Touch panel systems and methods are disclosed that can distinguish temporally overlapping touch inputs from single touch inputs so that valid touch position coordinates can be determined. Touch panel systems and methods of the present invention can distinguish overlapping touches by comparing signal magnitudes to specified thresholds, by comparing the rates of change of signal magnitudes or measured positions to determined parameters, by locating the proximity a calculated location to icons or other such active areas, and the like. Because touch panel systems and methods of the present invention can discriminate single touches from double touches, they can be used in multiple user applications such as multiplayer games as well as in applications that may be subject to rapidly successive or overlapping touch inputs.

8493355, Jul 23, 2013

May 13, 2009

12/465197

Bernard O. Geaghan - Salem NH, US
Craig A. Cordeiro - Westford MA, US

3M Innovative Properties Company - St. Paul MN

G06F 3/044

345174, 345156, 345173, 178 1801, 178 1806, 463 37, 463 38

Matrix-based touch input systems assess touch locations of two or more temporally overlapping touch inputs by forming valid x-y coordinate pairs from independently determined x- and y-coordinates. Valid x-y pairs are formed based on comparing one or more signal parameters such as signal magnitude, signal strength, signal width, and signal rates of change. In matrix capacitive systems where capacitance-to-ground signals are used to determine the x- and y-coordinates, the determined coordinates may be formed into valid x-y pairs using mutual capacitance measurements. When resolving more than two temporally overlapping touches, information gained by resolving a valid x-y coordinate pair of at least one of the touches may be used to resolve the remaining touches.

20070074913, Apr 5, 2007

Oct 5, 2005

11/243533

Bernard Geaghan - Salem NH, US
Craig Cordeiro - Westford MA, US

G08C 21/00

178018060

Touch sensing systems and methods employ a touch surface and a touch sensor. An array of electrodes of the touch sensor is configured to capacitively couple to a touch in proximity with the touch surface. Circuitry is coupled to each electrode via a channel and configured to sense signals present on the electrodes. The circuitry is configured to independently adjust a sensed response of each electrode. For example, the circuitry may be configured to adjust a gain of each channel, an offset of each channel, or a gain and offset of each channel.

20070236478, Oct 11, 2007

Jun 19, 2007

11/765163

Bernard GEAGHAN - Salem MA, US
Robert Moshrefzadeh - Oakdale MN, US
Craig Cordeiro - Westford MA, US
Edward Hagermoser - Lancaster MA, US
James Hart - Georgetown MA, US
Paul Hatin - Londonderry NH, US
Karl Hauck - Somerville MA, US
Richard Peterson - Chelmsford MA, US
Stephen Schulz - Lee NH, US
Gordon Taylor - Bolton MA, US

G06F 3/041

345173000

Touch panel systems and methods are disclosed that can distinguish temporally overlapping touch inputs from single touch inputs so that valid touch position coordinates can be determined. Touch panel systems and methods of the present invention can distinguish overlapping touches by comparing signal magnitudes to specified thresholds, by comparing the rates of change of signal magnitudes or measured positions to determined parameters, by locating the proximity a calculated location to icons or other such active areas, and the like. Because touch panel systems and methods of the present invention can discriminate single touches from double touches, they can be used in multiple user applications such as multiplayer games as well as in applications that may be subject to rapidly successive or overlapping touch inputs.