Invention Grant
- Patent Title: Electric field touchscreen
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Application No.: US17249824Application Date: 2021-03-15
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Publication No.: US11604538B2Publication Date: 2023-03-14
- Inventor: Matthew Thomas Hungerford , Robert M. Khamashta
- Applicant: ChargePoint, Inc.
- Applicant Address: US CA Campbell
- Assignee: ChargePoint, Inc.
- Current Assignee: ChargePoint, Inc.
- Current Assignee Address: US CA Campbell
- Agency: Nicholson De Vos Webster & Elliott LLP
- Main IPC: G06F3/041
- IPC: G06F3/041 ; G06F3/044

Abstract:
An electric field (e-field) touchscreen is described. A continuous stream of digital signal data that represents e-field signal deviations is received from multiple receive electrodes. The stream of digital signal data is processed using a machine learning model to determine a touch event and a location on a display screen of the touchscreen. The touch event is processed. The e-field touchscreen may determine whether a non-normal event may be occurring causing noise in the digital signal data. If so, the received stream of digital signal data is processed through a low-pass filter and processed through an absolute value average baseline filter. A difference between the filtered data is determined to generate a filtered stream of digital signal data and is processed using the machine learning model determine a touch event and a location on a display screen of the touch event. The touch event is processed.
Public/Granted literature
- US20210271341A1 Electric Field Touchscreen Public/Granted day:2021-09-02
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