Touch sensing device and power management method thereof
AssigneeIli Technology Corp.
InventorChun-Yu Jiang
Life of this patent
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Abstract
A touch sensing device and a power management method thereof are provided. The touch sensing device includes a touch panel, a power supply and a capacitor circuit. The power supply is used to provide a driving voltage to the touch panel during multiple first sub-periods of an uplink signal transmitting period, and to stop providing the driving voltage to the touch pad during multiple second sub-periods of the uplink signal transmitting period. The capacitor circuit obtains a recycle energy according to a discharge charge flowing from the touch panel during the second sub-periods of the uplink signal transmitting period.
Claims18
A touch sensing device, comprising:
- a touch panel;
- a power supply, coupled to the touch panel, and used to provide a driving voltage to the touch panel during a plurality of first sub-periods of an uplink signal transmitting period and to stop providing the driving voltage to the touch panel during a plurality of second sub-periods of the uplink signal transmitting period;
- and
- a capacitor circuit, coupled to the touch panel, and configured to obtain a recycle energy according to a discharge charge flowing from the touch panel during the plurality of second sub-periods of the uplink signal transmitting period,
- wherein the capacitor circuit is further coupled to an offset power source, used to be superimposed on a voltage of the capacitor circuit to generate an adjusted voltage and provide the adjusted voltage so as to charge an energy storage capacitor.
A power management method, comprising:
- causing a power supply to provide a driving voltage to a touch panel during a plurality of first sub-periods of an uplink signal transmitting period, and to stop providing the driving voltage to the touch panel during a plurality of second sub-periods of the uplink signal transmitting period;
- causing a capacitor circuit to obtain a recycle energy according to a discharge charge flowing from the touch panel during the plurality of second sub-periods of the uplink signal transmitting period;
- providing an offset power source to superimpose on a voltage of the capacitor circuit so as to generate an adjusted voltage;
- and
- providing the adjusted voltage to charge an energy storage capacitor.
Dependencies are inferred from the claim text.