Method and system for detecting multiple touches on a...

Details Method and system for detecting multiple touches on a... Method and system for detecting multiple touches on a...

2007-11-13

2007-11-13

Lefkowitz, Sumati (Department: 2629)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

C345S174000, C345S175000, C178S018010

Reexamination Certificate

active

10924508

ABSTRACT:
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.

REFERENCES:
patent: 4819194 (1989-04-01), Koizumi et al.
patent: 4929934 (1990-05-01), Ueda et al.
patent: 5225636 (1993-07-01), Protheroe
patent: 5241139 (1993-08-01), Gungl et al.
patent: 5245139 (1993-09-01), Protheroe et al.
patent: 5283559 (1994-02-01), Kalendra et al.
patent: 5565894 (1996-10-01), Bates et al.
patent: 5764223 (1998-06-01), Chang et al.
patent: 5854450 (1998-12-01), Kent
patent: 5896126 (1999-04-01), Shieh
patent: 5956020 (1999-09-01), D'Amico et al.
patent: 6181328 (2001-01-01), Shieh et al.
patent: 6323846 (2001-11-01), Westerman et al.
patent: 6353193 (2002-03-01), Atwood et al.
patent: 6831631 (2004-12-01), Chuang
patent: 6888537 (2005-05-01), Benson et al.
patent: 6943779 (2005-09-01), Satoh
patent: 7002556 (2006-02-01), Tsukada et al.
patent: 2002/0075243 (2002-06-01), Newton
patent: 2003/0063073 (2003-04-01), Geaghan et al.
patent: 2003/0071797 (2003-04-01), Chang et al.
patent: 2003/0197689 (2003-10-01), May
patent: 2003/0222857 (2003-12-01), Abileah
patent: 2004/0001048 (2004-01-01), Kraus et al.
patent: 2004/0140993 (2004-07-01), Geaghan et al.
patent: 2004/0155871 (2004-08-01), Perdki et al.
patent: 2005/0012724 (2005-01-01), Kent
patent: 2005/0030291 (2005-02-01), Yanagisawa
patent: 2005/0093845 (2005-05-01), Brooks et al.
patent: 2005/0104867 (2005-05-01), Westerman et al.
patent: 2005/0128190 (2005-06-01), Ryynanen
patent: 2005/0253818 (2005-11-01), Nettamo
Bamdad Samii, “Cartesian Coordinate System, Distance and Midpoint Formula,” 3 pages, 1997, retrieved from http://allchinfiles.com/cartesianexp.html on Aug. 12, 2004.

Affiliated with

Also associated with

Rating

Method and system for detecting multiple touches on a... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and system for detecting multiple touches on a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for detecting multiple touches on a... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3853587