06856259 is referenced by 318 patents and cites 13 patents.

Touch input systems for use with information display systems and methods distinguishing multiple touches overlapping in time. The touch input systems and methods analyze and optimize data collected on the X axis over time independently from that collected on the Y axis, and for each (X, Y) pair corresponding to a potential touch location, calculate correlation values between X magnitudes and Y magnitudes. The touch input system determines valid touch locations based on the correlation values. Because the touch input systems and methods of the present invention can process multiple concurrent touches, they can be used in applications for multiple users, such as games, and in other applications requiring the processing of concurrent touch inputs.

Title
Touch sensor system to detect multiple touch events
Application Number
10/773611
Publication Number
6856259 (B1)
Application Date
February 6, 2004
Publication Date
February 15, 2005
Inventor
Jeffrey L Sharp
Newark
CA, US
Assignee
Elo Touchsystems
CA, US
IPC
H03M 001/22
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