Driving electrodes with different phase signals
First Claim
Patent Images
1. A controller comprising:
- drive circuitry operable to;
drive, over a time period, one target drive electrode of a touch sensitive device with a series of pulses having a predetermined phase, the series of pulses having the predetermined phase being a series of consecutive pulses having the predetermined phase; and
drive, over the time period, each of at least first and second drive electrodes of the touch sensitive device with a corresponding series of out-of-phase pulses, the first and second drive electrodes each being directly adjacent to the target drive electrode, one or more of the first and second drive electrodes being driven using fractional bursts of out-of-phase pulses such that at least one of the first and second drive electrodes is not driven with a corresponding out-of-phase pulse for at least one pulse of the series of pulses; and
sense circuitry operable 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.
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Citations
19 Claims
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1. A controller comprising:
drive circuitry operable to; drive, over a time period, one target drive electrode of a touch sensitive device with a series of pulses having a predetermined phase, the series of pulses having the predetermined phase being a series of consecutive pulses having the predetermined phase; and drive, over the time period, each of at least first and second drive electrodes of the touch sensitive device with a corresponding series of out-of-phase pulses, the first and second drive electrodes each being directly adjacent to the target drive electrode, one or more of the first and second drive electrodes being driven using fractional bursts of out-of-phase pulses such that at least one of the first and second drive electrodes is not driven with a corresponding out-of-phase pulse for at least one pulse of the series of pulses; and sense circuitry operable 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)
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12. A method comprising:
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pulsing, over a time period, a target field emitting electrode of a touch sensitive device with a series of predetermined phase pulses, the series of predetermined phase pulses being a series of consecutive pulses; pulsing, over the time period, each of at least first and second field emitting electrodes of the touch sensitive device with a corresponding series of out-of-phase pulses, the first and second field emitting electrodes each being directly adjacent to the target field emitting electrode, the first and second field emitting electrodes being pulsed using fractional bursts of out-of-phase pulses such that the first and second field emitting electrodes are not pulsed with a corresponding out-of-phase pulse for at least one pulse of the series of 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 (13, 14, 15, 16, 17, 18)
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19. A system comprising:
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drive circuitry operable to sequentially drive, over a time period, target drive electrodes of a touch sensitive device with a series of predetermined phase pulses, the series of predetermined phase pulses being a series of consecutive pulses, and to drive, over the time period, each of at least first and second drive electrodes of the touch sensitive device with a corresponding series of out-of-phase pulses, the first and second drive electrodes being directly adjacent to at least one of the target drive electrodes, one or more of the first and second drive electrodes being driven using fractional bursts of out-of-phase pulses such that at least one of the first and second drive electrodes is not driven with a corresponding out-of-phase pulse for at least one pulse of the series of pulses; sense circuitry operable 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 operable to determine a reference signal from the received signals acquired during driving multiple target drive electrodes for the touch.
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Specification