CAPACITIVE TOUCH PANEL WITH INCREASED SCAN FREQUENCY

摘要

A system includes a first group of transmit electrodes configured to be driven from a first side of a capacitive touch panel and a second group of transmit electrodes configured to be driven from a second side of the panel. The system also includes receive electrodes and a controller operatively coupled with the transmit electrodes and the receive electrodes. The controller is operable to dynamically configure the transmit electrodes and the receive electrodes to compensate for phase delays introduced by driving the transmit electrodes from different sides of the panel. A method includes driving a first group of transmit electrodes from a first side of a capacitive touch panel, driving a second group of transmit electrodes from a second side of the panel, and dynamically configuring the transmit electrodes and receive electrodes to compensate for phase delays introduced by driving the transmit electrodes from different sides of the panel.

主权项

1. A system, comprising:
a first plurality of elongated transmit electrodes arranged proximate to one another and configured to be driven from a first side of a capacitive touch panel; a second plurality of elongated transmit electrodes arranged proximate to one another and configured to be driven from a second side of the capacitive touch panel; a plurality of elongated receive electrodes arranged proximate to one another across the first plurality of elongated transmit electrodes and the second plurality of elongated transmit electrodes; and a controller operatively coupled with the first plurality of elongated transmit electrodes, the second plurality of elongated transmit electrodes, and the plurality of elongated receive electrodes, the controller operable to dynamically configure the first plurality of elongated transmit electrodes, the second plurality of elongated transmit electrodes, and the plurality of elongated receive electrodes to compensate for phase delays introduced by driving the first plurality of elongated transmit electrodes and the second plurality of elongated transmit electrodes from the first side of the capacitive touch panel and the second side of the capacitive touch panel, respectively.