Architecture for differential driving and sensing of touch sensor panels

Abstract

The present disclosure relates to architectures for differential driving and sensing of touch sensor panels. Differential driving and / or differential sensing can reduce noise in touch and / or display systems of touchscreens. In some examples, a touch sensor panel can include column electrodes and row electrodes that are arranged vertically to a first edge of the touch sensor panel. In some examples, the touch sensor panel can be divided into groups. In some examples, for three groups, wiring traces for rows can be implemented using four wiring tracks per column. In some examples, the arrangement of wiring traces within the wiring tracks can improve optical properties and / or reduce wiring trace resistance and loading. In some examples, interconnect portions between the wiring traces and the row electrodes can have a V-shaped pattern, an S-shaped pattern, or a hybrid pattern. In some examples, differential sensing wiring can reduce cross-coupling within the touch sensor panel. In some examples, interleaved differential driving signals can reduce parasitic signal loss.

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