DRIVING ELECTRODES WITH DIFFERENT PHASE SIGNALS
First Claim
Patent Images
1. A controller comprising:
- drive circuitry to drive one target drive electrode of a touch sensitive device with a series of pulses having a predetermined phase and to drive at least one other drive electrode of the touch sensitive device with a corresponding series of out-of-phase pulses; and
sense circuitry to receive signal transferred to sense electrodes from the drive electrodes of the touch sensitive device, wherein the received signal is responsive to one or more touches on the touch sensitive device.
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Abstract
A controller includes drive circuitry to drive one target drive electrode of a touch sensitive device with a series of predetermined phase pulses and to drive at least one other drive electrode of the touch sensitive device with a corresponding series of out-of-phase pulses. Sense circuitry receives signal transferred to sense electrodes from the drive electrodes of the touch sensitive device. The received signal is responsive to one or more touches on the touch sensitive device.
58 Citations
21 Claims
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1. A controller comprising:
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drive circuitry to drive one target drive electrode of a touch sensitive device with a series of pulses having a predetermined phase and to drive at least one other drive electrode of the touch sensitive device with a corresponding series of out-of-phase pulses; and sense circuitry to receive signal transferred to sense electrodes from the drive electrodes of the touch sensitive device, wherein the received signal is responsive to one or more touches on the touch sensitive device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method comprising:
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pulsing a target field emitting electrode of a touch sensitive device with predetermined phase pulses; pulsing one or more other field emitting electrodes of the touch sensitive device with out-of-phase pulses; and acquiring signal from at least one receive electrode to determine a position of one or more touches on the touch sensitive device. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A system comprising:
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drive circuitry to sequentially drive target drive electrodes of a touch sensitive device with a series of predetermined phase pulses and to drive at least one other drive electrode of the touch sensitive device with a corresponding series of out-of-phase pulses; sense circuitry to receive signal transferred to multiple sense electrodes from the drive electrodes of the touch sensitive device, wherein the received signal is responsive to a touch on the touch sensitive device; and signal processing logic to determine a reference signal from the received signals acquired during driving multiple target drive electrodes for the touch.
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Specification