Invention Grant
- Patent Title: Mutual hover protection for touchscreens
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Application No.: US16532872Application Date: 2019-08-06
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Publication No.: US10942601B2Publication Date: 2021-03-09
- Inventor: Praveesh Chandran , Gee-Heng Loh , Ravi Bhatia , Ys On
- 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: G09G5/00
- IPC: G09G5/00 ; G06F3/041 ; G06F3/044

Abstract:
A capacitive sensing structure includes a first sensing electrode located in a first layer for sensing a first capacitance and producing a first sense signal indicative of the sensed first capacitance. A transmit electrode is located in the first layer and positioned surrounding 90%+ of a perimeter of the first sensing electrode. A second sensing electrode is located in the first layer and positioned surrounding 90%+ of a perimeter of the transmit electrode, the second sensing electrode to sense a second capacitance and produce a second sense signal indicative of the sensed second capacitance. Controller circuitry receives the first and second sense signals, compares a change in the sensed first capacitance to a change in the sensed second capacitance, and produces an output signal indicative of a user touch based upon the comparison between the change in the sensed first capacitance and the change in the sensed second capacitance.
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