MULTI-TOUCH FORCE SENSING TOUCH-SCREEN DEVICES AND METHODS Russian patent published in 2013 - IPC G06F3/41 

FIELD: information technology.

SUBSTANCE: input system includes a touch sensor layer configured to receive touch input and a force sensor layer stacked with the touch sensor layer, the force sensor layer including an array of force sensors configured to receive force input. The force sensor array includes individual force sensors. Specific sensors of the force sensor array are associated with specific locations on the touch screen to add information which can be used to determine which key is actually being pressed and avoid errors. Both a touch signal and a force signal are used to determine the validity of a user touch input. In one version each force sensor may operate independently of the others. Particular versions are described which employ a coarse grid to determine valid touch inputs and which make a determination of a centroid location based on a plurality of force sensors to determine valid touch inputs.

EFFECT: providing input accuracy.

15 cl, 5 dwg