Force sensing touchpad

Details Force sensing touchpad Force sensing touchpad

1996-11-06

1998-12-29

Hofsass, Jeff

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

345174, 178 1803, 178 1806, G09G 500

Patent

active

058546251

ABSTRACT:
A force sensing touchpad comprises a substantially rigid touch surface; a substantially rigid frame; a plurality of spring structures formed integrally with the touch surface and mechanically connected to the reference frame; and a circuit for deriving force information from capacitances proportional to the distances between predetermined portions of the touch surface and portions of the frame in response to a force applied to the touch surfaces.

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