Invention Application
- Patent Title: CAPACITIVE TOUCH SYSTEM USING DIFFERENTIAL SENSING AND OPERATING METHOD THEREOF
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Application No.: US15016484Application Date: 2016-02-05
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Publication No.: US20170228059A1Publication Date: 2017-08-10
- Inventor: HSIN-CHIA CHEN , KENNETH CRANDALL , THOMAS PATRICK MURPHY
- Applicant: PIXART IMAGING INC.
- Main IPC: G06F3/044
- IPC: G06F3/044 ; G06F3/041

Abstract:
A capacitive touch system including a drive end, a capacitive sensing matrix and a detection end is provided. The drive end concurrently inputs encoded and modulated drive signals into a plurality of channels of the capacitive sensing matrix within each drive time slot of a frame. The detection end detects a detection matrix of the channels in the frame and decodes the detection matrix to respectively generate a two-dimensional detection vector corresponding to each of the channels. The detection end further calculates a subtraction between components of the two-dimensional detection vectors associated with two receiving electrodes of the capacitive sensing matrix to eliminate interference from noises.
Public/Granted literature
- US09740356B1 Capacitive touch system using differential sensing and operating method thereof Public/Granted day:2017-08-22
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