Invention Grant
- Patent Title: Capacitive sensing device capable of eliminating influence from mutual capacitance and operating method thereof
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Application No.: US14697923Application Date: 2015-04-28
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Publication No.: US09606671B2Publication Date: 2017-03-28
- Inventor: Kenneth Crandall , Thomas Patrick Murphy , Hsin-Chia Chen
- Applicant: PIXART IMAGING INC.
- Applicant Address: TW Hsin-Chu County
- Assignee: PIXART IMAGING INC.
- Current Assignee: PIXART IMAGING INC.
- Current Assignee Address: TW Hsin-Chu County
- Agency: Hauptman Ham, LLP
- Main IPC: G06F3/045
- IPC: G06F3/045 ; G06F3/041 ; G06F3/044

Abstract:
A capacitive sensing device including a touch panel and a controller chip is provided. The touch panel includes a plurality of first electrodes and a plurality of second electrodes. The controller chip includes a plurality of input capacitors and a plurality of output resistors. The input capacitors are selectively coupled to signal inputs of the first electrodes and the second electrodes, respectively. The output resistors are respectively coupled to signal outputs of the first electrodes and the second electrodes. The input capacitors and the output resistors are configured to form bridge circuits to suppress the influence of mutual capacitance between the first electrodes and the second electrodes.
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