SINGLE-CHIP TOUCH CONTROLLER WITH INTEGRATED DRIVE SYSTEM
First Claim
Patent Images
1. A touch controller for controlling a touch sensor panel, comprising:
- a plurality of sense channels that receive sensor signals from the touch sensor panel;
a drive system that generates a plurality of stimulation signals based on a supply voltage on the order of digital logic level supply voltages, the stimulation signals for simultaneously stimulating multiple drive lines of the touch sensor panel; and
a channel controller that controls the sense channels and the drive system;
wherein the plurality of sense channels, the drive system, and the channel controller are formed on a single chip.
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Abstract
A touch controller for controlling a touch sensor panel is provided. The touch controller includes a plurality of sense channels that receive sensor signals from the touch sensor panel, a drive system that generates a plurality of stimulation signals based on a supply voltage on the order of digital logic level supply voltages, the stimulation signals for simultaneously stimulating multiple drive lines of the touch sensor panel, and a channel controller that controls the sense channels and the drive system. The plurality of sense channels, the drive system, and the channel controller are formed on a single chip.
261 Citations
21 Claims
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1. A touch controller for controlling a touch sensor panel, comprising:
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a plurality of sense channels that receive sensor signals from the touch sensor panel; a drive system that generates a plurality of stimulation signals based on a supply voltage on the order of digital logic level supply voltages, the stimulation signals for simultaneously stimulating multiple drive lines of the touch sensor panel; and a channel controller that controls the sense channels and the drive system; wherein the plurality of sense channels, the drive system, and the channel controller are formed on a single chip. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for controlling a touch sensor panel using a single chip, comprising:
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generating, within the chip, a first plurality of stimulation signals having amplitudes on the order of digital logic level voltages, wherein the stimulation signals are generated in a first pattern for simultaneously stimulating multiple drive lines of the touch sensor panel during a first scan of the touch sensor panel; wherein the stimulation signal amplitudes are sufficient to produce sensor signals from the touch sensor panel having a signal-to-noise ratio above a predetermined threshold for obtaining a touch image. - View Dependent Claims (17, 18, 19)
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20. A mobile telephone including a touch sensor panel and a touch controller for controlling the touch sensor panel, the touch controller comprising:
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a plurality of sense channels that receive sensor signals from the touch sensor panel; a drive system that generates a plurality of stimulation signals based on a supply voltage on the order of digital logic level supply voltages, the stimulation signals for simultaneously stimulating multiple drive lines of the touch sensor panel; and a channel controller that controls the sense channels and the drive system; wherein the plurality of sense channels, the drive system, and the channel controller are formed on a single chip.
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21. A digital media player including a touch sensor panel and a touch controller for controlling the touch sensor panel, the touch controller comprising:
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a plurality of sense channels that receive sensor signals from the touch sensor panel; a drive system that generates a plurality of stimulation signals based on a supply voltage on the order of digital logic level supply voltages, the stimulation signals for simultaneously stimulating multiple drive lines of the touch sensor panel; and a channel controller that controls the sense channels and the drive system; wherein the plurality of sense channels, the drive system, and the channel controller are formed on a single chip.
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Specification