Method and system for detecting multiple touches on a touch-sensitive screen

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United States of America Patent

PATENT NO 7053887
SERIAL NO

10921408

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Abstract

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Disclosed are a method and a system for detecting multiple, simultaneous touches on a touch-sensitive screen of a computing device. The hardware that controls the touch screen performs two measurements to locate a touch location on the screen. If there is a single touch, then the two measurements are equal. A non-zero difference indicates multiple touches and is correlated with the spread of locations simultaneously touched on the screen. If the difference is greater than a set threshold, then an indication is given of multiple touches. The user is warned against multiple touches, and input from the screen is ignored as long as multiple touches are detected. For some embodiments, when multiple touches are detected, the invention also tries to indicate the boundary of the set of locations simultaneously touched. The boundary is used to interpolate the intended single touch from the locations of all the touches.

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Patent Owner(s)

Patent OwnerAddress
MICROSOFT TECHNOLOGY LICENSING LLCONE MICROSOFT WAY REDMOND WA 98052

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kraus, Mark Gerard Redmond, WA 6 1228
Nguyen, Vu Xuan Seattle, WA 7 1234

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