ACTIVE STYLUS SYNCHRONIZATION

摘要

A touch-sensing system comprises an active stylus including a probe electrode and associated sensory logic. The sensory logic is configured to receive a synchronization pulse sequence via the probe electrode between consecutive touch-sensing frames of a capacitive touch screen, to use the synchronization pulse sequence to synchronize a local row counter of the sensory logic to a remote row counter of the capacitive touch screen, to receive an excitation pulse via the probe electrode within a given touch-sensing frame, and to use the excitation pulse to maintain synchronization between the local row counter and the remote row counter.

主权项

1. A touch-sensing system comprising:
an active stylus including a probe electrode and associated sensory logic; the sensory logic configured to:
receive a synchronization pulse sequence via the probe electrode between consecutive touch-sensing frames of a capacitive touch screen;use the synchronization pulse sequence to synchronize a local row counter of the sensory logic to a remote row counter of the capacitive touch screen;receive an excitation pulse via the probe electrode within a given touch-sensing frame; anduse the excitation pulse to maintain synchronization between the local row counter and the remote row counter.