CAPACITIVE TOUCH PANEL CONFIGURED TO SENSE BOTH ACTIVE AND PASSIVE INPUT WITH A SINGLE SENSOR

摘要

A capacitive touch panel includes sense electrodes arranged next to one another and drive electrodes arranged next to one another across the sense electrodes. The drive electrodes and the sense electrodes define a coordinate system where each coordinate location comprises a capacitor formed at a junction between one of the drive electrodes and one of the sense electrodes via mutual capacitance between the electrodes. The drive electrodes are configured to receive a first signal from a driver coupled with the drive electrodes for powering the drive electrodes to sense passive input to the capacitive touch panel at each coordinate location. Passive input can also be sensed via self-capacitance of the capacitive touch panel sensors. The drive electrodes and the sense electrodes are configured to receive a second signal from an active stylus to sense active input to the capacitive touch panel at each coordinate location.

主权项

1. A system comprising:
an active stylus; and a capacitive touch panel comprising:
a plurality of sense electrodes arranged next to one another anda plurality of drive electrodes arranged next to one another across the plurality of sense electrodes, the plurality of drive electrodes and the plurality of sense electrodes defining a coordinate system where each coordinate location comprises a capacitor formed at a junction between one of the plurality of drive electrodes and one of the plurality of sense electrodes, the plurality of drive electrodes configured to receive a first signal from a driver coupled with the plurality of drive electrodes for powering the plurality of drive electrodes to sense passive input to the capacitive touch panel at each coordinate location, and the plurality of drive electrodes and the plurality of sense electrodes configured to receive a second signal from the active stylus to sense active input to the capacitive touch panel at each coordinate location.