Invention Grant
- Patent Title: Calculation of touch coordinates using mixed processing of mutual capacitance sensing data and self capacitance sensing data
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Application No.: US16055922Application Date: 2018-08-06
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Publication No.: US10775927B2Publication Date: 2020-09-15
- Inventor: Youngjin Wang , Tae-gil Kang
- Applicant: STMicroelectronics Asia Pacific Pte Ltd
- Applicant Address: SG Singapore
- Assignee: STMicroelectronics Asia Pacific Pte Ltd
- Current Assignee: STMicroelectronics Asia Pacific Pte Ltd
- Current Assignee Address: SG Singapore
- Agency: Crowe & Dunlevy
- Main IPC: G06F3/041
- IPC: G06F3/041 ; G06F3/044

Abstract:
A data frame in a touch capacitive sensing circuit includes both mutual capacitance data and self capacitance data. The mutual capacitance data and self capacitance data of the frame are filtered to define mutual capacitance and self capacitance islands. Centroids of the mutual capacitance and self capacitance islands are calculated and then processed in a weighted mixing operation to produce a hybrid centroid that more accurately locates the coordinates of a detected touch/hover.
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