Touch screen sensing apparatus


Appareil capteur pour un écran tactile


A method of and apparatus for determination of touch location on a display screen or the like or other surface embodying a force-sensing platform or surface supporting or otherwise externally contacting the display screen monitor apparatus, and responding to the forces created by the thrust of touching a point of the display screen, to sense and calculate the location of the touching point. The underlying technique employs force-sensing means responsive to all six degrees of freedom of applied (touching) force and torque, achieving force location away from the plane of the sensors and in spite of tangential force components by calculating the point of least magnitude of the three-dimensional torque vector from among all points within the screen or surface, and outputting this point as an estimate of the intersection point of the screen or surface with the thrust line of the touching or other contact force.




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Patent Citations (1)

    Publication numberPublication dateAssigneeTitle
    US-4121049-AOctober 17, 1978Raytheon CompanyPosition and force measuring system

NO-Patent Citations (2)

    IBM TECHNICAL DISCLOSURE BULLETIN vol. 31, no. 5, October 1988, NEW YORK, US pages 404 - 406 'Touch-Sensitive Pancake'
    IBM TECHNICAL DISCLOSURE BULLETIN vol. 33, no. 5, October 1990, NEW YORK, US pages 173 - 175 'Touch-Screen Device using bending/torsion Member'

Cited By (2)

    Publication numberPublication dateAssigneeTitle
    WO-03038737-A2May 08, 2003Baltus ReneTouch and/or writing pressure detector
    WO-03038737-A3September 18, 2003Rene BaltusTast- und/oder schreibdruckaufnehmer