公开(公告)号：WO2020169953A1

公开(公告)日：2020-08-27

申请号：PCT/GB2020/050368

申请日：2020-02-17

Applicant: CAMBRIDGE TOUCH TECHNOLOGIES LTD.

Inventor： ASTLEY, Michael ,  NATHAN, Arokia ,  TSANGARIDES, Constantinos ,  SHARMA, Paridhi ,  CHENG, Xiang ,  LI, Jiahao ,  MARQUES, Afonso

IPC: G06F3/041 ,  G06F3/044

Abstract: A force-sensing touch panel (31) is described which includes a layer structure stacked in a thickness direction between first and second surfaces. The layer structure includes from first surface to second surface, a number of first electrodes (7) and a number of second electrodes (8), a layer of piezoelectric material (9), and a number of third electrodes (30). The first and second electrodes (7, 8) are configured to define a coordinate system for sensing a location of a force applied to the touch panel in a plane perpendicular to the thickness direction. The third electrodes (30) are configured such that signals received from the first, second and third electrodes (7, 8, 30) enable determining unique locations corresponding to two or more forces applied to the touch panel (31) concurrently.