Invention Application
- Patent Title: TOUCH PANEL FOR COMBINED CAPACITIVE TOUCH AND FORCE SENSING
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Application No.: PCT/GB2020/050151Application Date: 2020-01-23
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Publication No.: WO2020152464A3Publication Date: 2020-07-30
- Inventor: TSANGARIDES, Constantinos , SHARMA, Paridhi , CHENG, Xiang , LI, Jiahao , ASTLEY, Michael , NATHAN, Arokia
- Applicant: CAMBRIDGE TOUCH TECHNOLOGIES LTD.
- Applicant Address: 154 Cambridge Science Park Milton Road Cambridge Cambridgeshire CB4 0GN GB
- Assignee: CAMBRIDGE TOUCH TECHNOLOGIES LTD.
- Current Assignee: CAMBRIDGE TOUCH TECHNOLOGIES LTD.
- Current Assignee Address: 154 Cambridge Science Park Milton Road Cambridge Cambridgeshire CB4 0GN GB
- Agency: DUNLEAVY, Christopher et al.
- Priority: GB1901073.5 20190125
- Main IPC: G06F3/041
- IPC: G06F3/041 ; G06F3/044
Abstract:
A touch sensor (1) for combined capacitive touch and force sensing is described. The touch sensor (1) includes number plurality of first electrodes (4) and a number of second electrodes (5). The second electrodes (5) are insulated from the first electrodes (4). The first and second electrodes (4, 5) form a grid for capacitive touch sensing. The touch sensor (1) also includes a transparent cover (6). The touch sensor (1) also includes a transparent piezoelectric film (3) arranged between the transparent cover (6) and the first and second electrodes (4, 5). The touch sensor (1) also includes a patterned counter electrode (8) disposed between the transparent piezoelectric film (3) and the transparent cover (6). The patterned counter electrode (8) is a conductive grid formed from the union of plurality of counter electrode line elements (9). A pitch of the counter electrode line elements (9) is larger than a pitch of the first electrodes (4) and/or second electrodes (5).
Public/Granted literature
- WO2020152464A2 TOUCH PANEL Public/Granted day:2020-07-30
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