ADJUSTMENT OF TOUCH SENSING STIMULATION VOLTAGE LEVELS BASED ON TOUCH PERFORMANCE

摘要

The adjustment of stimulation signal amplitudes in capacitive touch sensor panels and/or styli to reduce power consumption while preserving satisfactory touch performance is disclosed, in particular in situations where the noise level is not significant and there is excess SNR margin. To accomplish this, one or more metrics can be measured, calculated or otherwise determined to use as a predictor of touch performance, and these metrics can be processed to determine the minimum stimulation voltage required to maintain acceptable touch performance.

主权项

1. A method of determining a stimulation voltage for a touch sensing system, comprising:
capturing a plurality of touch sensor panel images over a particular time interval; computing one or more metrics based on the plurality of captured touch sensor panel images; and determining a minimum acceptable stimulation voltage from the one or more metrics.