Invention Application
- Patent Title: DIFFERENTIAL DRIVE AND SENSE FOR TOUCH SENSOR PANEL
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Application No.: US18068486Application Date: 2022-12-19
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Publication No.: US20230118216A1Publication Date: 2023-04-20
- Inventor: John Stephen SMITH , Amit NAYYAR , Joseph Kurth REYNOLDS , Sagar Rajiv VAZE , Marduke YOUSEFPOR
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Main IPC: G06F3/044
- IPC: G06F3/044 ; G06F3/041

Abstract:
Touch sensor panels (or touch screens) can improve signal-to-noise ratio (SNR) using touch electrode patterns for differential drive and/or differential sense techniques. In some examples, a touch sensor panel can include a two-dimensional array of touch nodes formed from a plurality of touch electrodes. Each column (or row) of touch nodes can be driven with a plurality of drive signals. For example, a first column (or row) of touch nodes can be driven by a first drive signal applied to one or more first touch nodes in the first column (or row) and a second drive signal applied to a one or more second touch nodes of the first column (or row). In some examples, the first drive signal and the second drive signal can be complimentary drive signals. In some examples, each row (or column) of touch electrodes can be sensed by differential sense circuitry.
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