Capacitive touch panel with increased scan frequency using dynamic phase compensation
First Claim
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, wherein dynamically configuring the plurality of elongated receive electrodes involves configuring the plurality of elongated receive electrodes to scan based upon the side of the capacitive touch panel from which a transmit electrode is driven in each scan step of a plurality of scan steps.
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Accused Products
Abstract
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.
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Citations
20 Claims
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1. A system, comprising:
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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, wherein dynamically configuring the plurality of elongated receive electrodes involves configuring the plurality of elongated receive electrodes to scan based upon the side of the capacitive touch panel from which a transmit electrode is driven in each scan step of a plurality of scan steps. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method comprising:
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driving a first plurality of elongated transmit electrodes arranged proximate to one another from a first side of a capacitive touch panel; driving a second plurality of elongated transmit electrodes arranged proximate to one another from a second side of the capacitive touch panel; and dynamically configuring the first plurality of elongated transmit electrodes, the second plurality of elongated transmit electrodes, and 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 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, wherein dynamically configuring the plurality of elongated receive electrodes involves configuring the plurality of elongated receive electrodes to scan based upon the side of the capacitive touch panel from which a transmit electrode is driven in each scan step of a plurality of scan steps. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A capacitive touch panel, comprising:
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a first plurality of elongated transmit electrodes arranged proximate to one another and configured to be driven from a first side of the 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 receive electrode arranged across the first plurality of elongated transmit electrodes and the second plurality of elongated transmit electrodes; and receive channel signal path circuitry coupled with the receive electrode, the receive channel signal path circuitry operable to dynamically configure the receive electrode 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, wherein the first plurality of elongated transmit electrodes is driven from the first side of the capacitive touch panel during a first time interval, and the second plurality of elongated transmit electrodes is driven from the second side of the capacitive touch panel during a second time interval, wherein dynamically configuring the plurality of elongated receive electrodes involves configuring the plurality of elongated receive electrodes to scan based upon the side of the capacitive touch panel from which a transmit electrode is driven in each scan step of a plurality of scan steps. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification