1
Bernard Kasser: Touch and pressure sensing method and apparatus. Logitech, Townsend and Townsend and Crew, December 14, 1999: US06002389 (375 worldwide citation)

The present invention provides a touch pad which can detect a simply stylus using a change capacitance. The touch pad is made flexible, so that the stylus pressure compresses an insulating layer between a conductive reference layer and matrix of conductive traces. The compression causes a change in ...


2
Kasser Bernard: Touch and pressure sensing method and apparatus. Logitech, Kasser Bernard, HAUGHEY Paul C, October 30, 1997: WO/1997/040482

The present invention provides a touch pad (10) which can detect a simple stylus using a change capacitance. The touch pad (10) is made flexible, so that the stylus pressure compresses an insulating layer between a conductive reference layer and matrix of conductive traces. The compression causes a ...