Resonator circuit for a modulated power supply
First Claim
1. A processing system for a display device comprising an integrated capacitive sensing device, the processing system comprising:
- a sensor module configured to be coupled to a plurality of sensor electrodes, each sensor electrode included in the plurality of sensor electrodes comprising at least one display electrode included in a plurality of display electrodes of the display device, wherein the sensor module drives the plurality of sensor electrodes for capacitive sensing during a first period;
a display driver configured to drive display signals onto the display electrodes during a second period, wherein the display signals are based on a reference voltage, and the first period and the second period are at least partially overlapping; and
a power supply configured to provide the reference voltage to the display driver, the power supply comprising a resonator circuit having an inductor connected in parallel with a capacitor, wherein the resonator circuit is configured to modulate the reference voltage.
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Accused Products
Abstract
Examples of the present disclosure generally provide a processing system for a display device including an integrated capacitive sensing device. The processing system includes a sensor module configured to be coupled to a plurality of sensor electrodes. Each sensor electrode includes at least one display electrode. The sensor module drives the plurality of sensor electrodes for capacitive sensing during a first period. The processing system further includes a display driver configured to drive display signals onto the display electrodes during a second period. The display signals are based on a reference voltage, and the first period and the second period are at least partially overlapping. The processing system further includes a power supply configured to provide the reference voltage to the display driver. The power supply includes a resonator circuit having an inductor connected in parallel with a capacitor and configured to modulate the reference voltage.
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Citations
24 Claims
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1. A processing system for a display device comprising an integrated capacitive sensing device, the processing system comprising:
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a sensor module configured to be coupled to a plurality of sensor electrodes, each sensor electrode included in the plurality of sensor electrodes comprising at least one display electrode included in a plurality of display electrodes of the display device, wherein the sensor module drives the plurality of sensor electrodes for capacitive sensing during a first period; a display driver configured to drive display signals onto the display electrodes during a second period, wherein the display signals are based on a reference voltage, and the first period and the second period are at least partially overlapping; and a power supply configured to provide the reference voltage to the display driver, the power supply comprising a resonator circuit having an inductor connected in parallel with a capacitor, wherein the resonator circuit is configured to modulate the reference voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A display device comprising an integrated capacitive sensing device, the display device comprising:
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a plurality of sensor electrodes, each sensor electrode included in the plurality of sensor electrodes comprising at least one display electrode included in a plurality of display electrodes of the display device; a processing system coupled to the plurality of sensor electrodes and configured to; drive the plurality of sensor electrodes for capacitive sensing during a first period; and drive display signals onto the display electrodes during a second period, wherein the display signals are based on a reference voltage, and the first period and the second period are at least partially overlapping; and a power supply configured to provide the reference voltage to the processing system, the power supply comprising a resonator circuit having an inductor connected in parallel with a capacitor, wherein the resonator circuit is configured to modulate the reference voltage. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A method of performing display updating with a display device comprising an integrated capacitive sensing device, the method comprising:
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driving a capacitive sensing signal onto a plurality of sensor electrodes during a first period, each sensor electrode included in the plurality of sensor electrodes comprising at least one display electrode included in a plurality of display electrodes of the display device; modulating a reference voltage via a resonator circuit, the resonator circuit having an inductor connected in parallel with a capacitor; adjusting at least one of a capacitance of the capacitor and an inductance of the inductor to control a frequency of the resonator circuit; and driving display update signals onto the display electrodes to update the display device during a second period, wherein the display signals are based on the reference voltage, and the first period and the second period are at least partially overlapping. - View Dependent Claims (23, 24)
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Specification