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.
申请公布号
US5854625(A)
申请公布日期
1998.12.29
申请号
US19960744283
申请日期
1996.11.06
申请人
SYNAPTICS, INCORPORATED
发明人
FRISCH, JOSEF C.;LEYH, GREGORY E.;PLATT, JOHN C.;ALLEN, TIMOTHY P.;SCHEDIWY, RICHARD R.;FAGGIN, FEDERICO