SENSOR WITH DIFFUSING RESISTOR

摘要

Electrode configurations for reducing wobble error for a stylus translating on a surface over and between electrodes of a touch sensor panel is disclosed. In some examples, electrodes associated with a more linear signal profile are correlated with lower wobble error. In some examples, electrodes are coupled to adjacent electrodes via diffusing resistors such that the signal profile for each electrode is spread to be more linear. In some configurations, the value of the diffusing resistors and series resistance associated with an electrode is selected based on a desired signal profile for that electrode. In some examples, the series resistance can include a trace resistance and a compensating resistance. The compensating resistance can compensate for a variance in trace resistance between electrodes, thus making series resistance substantially equal for each of the electrodes.

主权项

1. An apparatus comprising:
a touch sensor panel including:
a plurality of sense electrodes, including a first sense electrode and a second sense electrode;a plurality of diffusing resistors, including a first diffusing resistor coupled between the first sense electrode and the second sense electrode; sense circuitry coupled to the first and second sense electrodes and configured to detect a touch signal using the first sense electrode and the second sense electrode.