Abstract: In some aspects of the present disclosure, a touch-panel interface includes a plurality of receivers, wherein each of the receivers is coupled to one or more receive lines of a touch panel, and each of the receivers includes a switch capacitor network and an amplifier. The touch-panel interface also includes controller configured to control switches in the switch capacitor network of each of one or more of the receivers to operate each of the one or more of the receivers in one of a plurality of different receiver modes.

Abstract: In some aspects of the present disclosure, a method for touch-panel processing is provided. The method includes receiving a plurality of sensor signals from a touch panel, wherein each one of the plurality of sensor signals corresponds to a respective one of a plurality of channels of the touch panel. The method also includes, for each one of the received sensor signals, converting the received sensor signal into one or more respective digital values. The method further includes, for each one of the received sensor signals, performing digital processing on the one or more respective digital values using a respective one of a plurality of processing engines to generate one or more respective processed digital values. The method further includes performing additional processing on the processed digital values.

Abstract: Aspects of the disclosure are related to a touch controller for use in a device having a processor and a touch sensor panel, the touch controller being coupled to the processor and the touch sensor panel, and further comprising: an analog front-end (AFE), wherein the AFE is configured to generate raw touch image data based on electrical signals generated by the touch sensor panel in response to one or more detected touches thereto; a coarse processing element configured to, in response to the processor being set to a sleep mode, coarsely process the raw touch image data to generate sparse data; and an embedded memory configured to store at least the sparse data, wherein the touch controller is configured to transmit a signal to the processor to wake the processor up and transmit the stored sparse data and new touch image data to the processor, wherein the processor performs gesture recognition based on the sparse data and the new touch image data.

Abstract: In some aspects of the present disclosure, a method for touch-panel processing is provided. The method includes receiving a plurality of sensor signals from a touch panel, wherein each one of the plurality of sensor signals corresponds to a respective one of a plurality of channels of the touch panel. The method also includes, for each one of the received sensor signals, converting the received sensor signal into one or more respective digital values. The method further includes, for each one of the received sensor signals, performing digital processing on the one or more respective digital values using a respective one of a plurality of processing engines to generate one or more respective processed digital values. The method further includes performing additional processing on the processed digital values.

Abstract: In some aspects of the present disclosure, a touch-panel interface includes a plurality of receivers, wherein each of the receivers is coupled to one or more receive lines of a touch panel, and each of the receivers includes a switch capacitor network and an amplifier. The touch-panel interface also includes controller configured to control switches in the switch capacitor network of each of one or more of the receivers to operate each of the one or more of the receivers in one of a plurality of different receiver modes.

Abstract: Methods, devices, and computer program products for using touch orientation to distinguish between users are disclosed herein. In one aspect, a method of identifying a user of a touch device from a plurality of users of the touch device is described. The method includes receiving touch data from a touch panel of the touch device, the touch data indicating a user's touch on the touch screen. The method further includes determining an orientation of the user's touch based on the received touch data. Finally, the method includes identifying the user of the plurality of users which touched the device, based at least in part on the orientation of the touch.

Abstract: Systems and methods are disclosed for determining a touch position from data received from a touch panel. In one implementation, an apparatus for processing a touch input signal includes a processor that may be configured for parallel processing, a touch device, a memory, operably connected to the processor, and configured to store processor instructions. The processor instructions can configure the processor to receive a plurality of data points corresponding to a plurality of touch events on the touch device, determine a center of mass estimate from the plurality of data points, determine a search radius of center of mass estimate, and determine an optimal touch point position based on the center of mass estimate and the search radius using the processor.

Abstract: Aspects of the disclosure are related to a touch controller for use in a device having a processor and a touch sensor panel, the touch controller being coupled to the processor and the touch sensor panel, and further comprising: an analog front-end (AFE), wherein the AFE is configured to generate raw touch image data based on electrical signals generated by the touch sensor panel in response to one or more detected touches thereto; a coarse processing element configured to, in response to the processor being set to a sleep mode, coarsely process the raw touch image data to generate sparse data; and an embedded memory configured to store at least the sparse data, wherein the touch controller is configured to transmit a signal to the processor to wake the processor up and transmit the stored sparse data and new touch image data to the processor, wherein the processor performs gesture recognition based on the sparse data and the new touch image data.

Abstract: Certain aspects relate to systems and techniques for scan control for scanning a touch panel. The scan control system can alternate adaptively between scanning the touch panel in a passive scan mode requiring minimal power and in a focused active scan mode that sequentially scans only a portion of the touch panel. The scan control system can monitor the absolute capacitance of some or all of the sensors of the touch panel in passive scan mode and can monitor the mutual capacitance of a portion of the touch panel in focused active scan mode. If the absolute capacitance of any sensor is greater than the baseline capacitance, then the scan control can use this absolute capacitance touch data to determine one or more sub-regions of the touch panel for scanning in focused active scan mode. The mutual capacitance touch data can be used for determining features of the touch event.

Abstract: A method, an apparatus, and a computer program product for processing touchscreen information are provided. The method may include receiving touchscreen data that includes node values representative of signals generated by a touchscreen panel, generating a first data frame including difference values, and transmitting the first data frame over a control data bus. Each of the difference values may be calculated as a difference between one of the node values and a different node-related value wherein the first data frame has a predefined size. The first data frame may be configured to permit a receiver of the first data frame to reconstruct the touchscreen data without information loss.

Abstract: Lower report rates are desirable in touch devices to minimize power consumption. However, lower report rates lead to inaccurate and untimely depiction of a user's touch inputs on a touch display device. Disclosed are methods and apparatus for using a lower report rate; while maintaining substantially the same or better user experience achieved by using a higher report rate.

Abstract: The presence of moisture on a touch screen device can mimic a user's touch causing false input detection and recognition. Disclosed are systems and methods for detecting the presence of moisture on a touch screen device.

Abstract: Systems and methods are disclosed for determining a touch position from data received from a touch panel. In one implementation, an apparatus for processing a touch input signal includes a processor that may be configured for parallel processing, a touch device, a memory, operably connected to the processor, and configured to store processor instructions. The processor instructions can configure the processor to receive a plurality of data points corresponding to a plurality of touch events on the touch device, determine a center of mass estimate from the plurality of data points, determine a search radius of center of mass estimate, and determine an optimal touch point position based on the center of mass estimate and the search radius using the processor.

Abstract: Methods, devices, and computer program products for using touch orientation to distinguish between users are disclosed herein. In one aspect, a method of identifying a user of a touch device from a plurality of users of the touch device is described. The method includes receiving touch data from a touch panel of the touch device, the touch data indicating a user's touch on the touch screen. The method further includes determining an orientation of the user's touch based on the received touch data. Finally, the method includes identifying the user of the plurality of users which touched the device, based at least in part on the orientation of the touch.

Abstract: Systems and methods are disclosed for determining a touch position from data received from a touch panel. In one implementation, an apparatus for processing a touch input signal includes a processor that may be configured for parallel processing, a touch device, a memory, operably connected to the processor, and configured to store processor instructions. The processor instructions can configure the processor to receive a plurality of data points corresponding to a plurality of touch events on the touch device, determine a center of mass estimate from the plurality of data points, determine a search radius of center of mass estimate, and determine an optimal touch point position based on the center of mass estimate and the search radius using the processor.

Abstract: The presence of moisture on a touch screen device can mimic a user's touch causing false input detection and recognition. Disclosed are systems and methods for detecting the presence of moisture on a touch screen device.

Abstract: A method, an apparatus, and a computer program product for processing touchscreen information are provided. The method may include receiving touchscreen data that includes node values representative of signals generated by a touchscreen panel, generating a first data frame including difference values, and transmitting the first data frame over a control data bus. Each of the difference values may be calculated as a difference between one of the node values and a different node-related value wherein the first data frame has a predefined size. The first data frame may be configured to permit a receiver of the first data frame to reconstruct the touchscreen data without information loss.

Abstract: Certain aspects relate to systems and techniques for scan control for scanning a touch panel. The scan control system can alternate adaptively between scanning the touch panel in a passive scan mode requiring minimal power and in a focused active scan mode that sequentially scans only a portion of the touch panel. The scan control system can monitor the absolute capacitance of some or all of the sensors of the touch panel in passive scan mode and can monitor the mutual capacitance of a portion of the touch panel in focused active scan mode. If the absolute capacitance of any sensor is greater than the baseline capacitance, then the scan control can use this absolute capacitance touch data to determine one or more sub-regions of the touch panel for scanning in focused active scan mode. The mutual capacitance touch data can be used for determining features of the touch event.

Abstract: Lower report rates are desirable in touch devices to minimize power consumption. However, lower report rates lead to inaccurate and untimely depiction of a user's touch inputs on a touch display device. Disclosed are methods and apparatus for using a lower report rate; while maintaining substantially the same or better user experience achieved by using a higher report rate.

Abstract: The presence of moisture on a touch screen device can mimic a user's touch causing false input detection and recognition. Disclosed are systems and methods for detecting the presence of moisture on a touch screen device.