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US 10,095,358 B2Granted
Method for driving touch sensor to achieve faster sensor settling
AssigneeSynaptics Incorporated
InventorsPetr Shepelev, Adam Schwartz
Life of this patent
Estimating the term…
Abstract
A method and system for driving capacitive pixels in a touch sensor device using a multi-level drive scheme. The drive scheme includes driving a transmitter electrode with a boosted voltage for a first period, and driving the transmitter electrode with a second voltage for a second period. The multi-level transmitter signal is determined based on different settling responses associated with the capacitive pixels of the touch sensor device.
Claims33
A method for driving a sensor, the method comprising:
- driving a first transmitter electrode from a starting voltage to a target voltage comprising:
- applying a first voltage to the first transmitter electrode for a first duration based on a first settling response associated with the first transmitter electrode, wherein the first voltage is greater than the starting voltage and the target voltage of the first transmitter electrode;
- and
- applying the target voltage to the first transmitter electrode for a second duration based on a second settling response associated with the sensor, wherein the starting voltage and the target voltage are different, wherein the first settling response and the second settling response are different.
1 more element
A processing system, the processing system comprising:
- a driver module having driver circuitry configured for coupling to a first capacitive pixel associated with a first settling response and a second capacitive pixel associated with a second settling response, wherein the first capacitive pixel comprises a first transmitter electrode and a first receiver electrode;
- wherein the driver module is configured to drive the first transmitter electrode from a starting voltage to a target voltage comprising:
- apply a first voltage to the first transmitter electrode for a first duration, wherein the first voltage is greater than the starting voltage and the target voltage of the first capacitive pixel, wherein the starting voltage and the target voltage are different;
- and
- apply a second voltage to the first transmitter electrode for a second duration, wherein the first voltage and the second voltage are selected based on the first settling response and the second settling response.
2 more elements
A display device having an integrated sensing device, the display device comprising:
- a plurality of capacitive pixels configured to be driven for capacitive sensing, comprising a first capacitive pixel associated with a first settling response and a second capacitive pixel associated with a second settling response, wherein the first capacitive pixel comprises a first transmitter electrode and a first receiver electrode;
- a processor coupled to the first capacitive pixel and the second capacitive pixel, wherein the processor is configured to drive the first transmitter electrode from a starting voltage to a target voltage comprising:
- apply a first voltage to the first transmitter electrode for a first duration, wherein the first voltage is greater than the starting voltage and the target voltage of the first capacitive pixel, wherein the starting voltage and the target voltage are different;
- apply a second voltage to the first transmitter electrode for a second duration, wherein the first voltage and the second voltage are selected based on the first settling response and the second settling response.
1 more element
A processing system, the processing system comprising:
- a driver module having driver circuitry coupled a plurality of transmitter electrodes, the drive driver module configured to drive a first transmitter electrode from a starting voltage to a target voltage comprising:
- apply a first voltage to the first transmitter electrode of the plurality of transmitter electrodes for a first duration;
- apply a second voltage to the first transmitter electrode for a second duration;
- and
- apply a third voltage to the first transmitter electrode for a third duration, wherein the first voltage is greater than the second voltage and the second voltage is greater than the third voltage, and the third voltage is greater than the starting voltage, and wherein the starting voltage and the target voltage are different;
- and
- a receiver module coupled to a plurality of receiver electrodes and configured to receive resulting signals with the receiver electrodes while the first voltage, the second voltage and the third voltage are applied to the first transmitter electrode.
4 more elements
Dependencies are inferred from the claim text.