Abstract: A system and method for reducing electromagnetic interference of a display device. The display device may have a plurality of gate electrodes and a plurality of common electrodes. Further, the display device includes a processing system that is configured to drive a first gate electrode of a plurality of gate electrodes of the display device with a first gate select signal to select first subpixels for updating during a first period. The processing system further comprises driving a first common electrode proximate the first gate electrode with a reference signal during the first period. Further, the processing system is configured to drive a second common electrode with a first interference reduction signal during the first period to reduce the electromagnetic interference of the display device.

Abstract: An input device includes a plurality of sensor electrodes and a processing system that is operable in at least a first mode or a second mode. The processing system is configured to receive an input current from a pair of the sensor electrodes. When operating the first mode, the processing system is configured to measure a capacitance across the pair of sensor electrodes based on the received input current. When operating the second mode, the processing system is configured to measure a resistance between the pair of sensor electrodes based on the received input current.

Abstract: A processing system for a display device comprises a display driver configured to generate a gate select signal and output the gate select signal to gate select control circuitry to be driven on gate lines for display updating. The gate select signal comprises a transition from a first voltage to a second voltage, a transition from the second voltage to a third voltage, and a transition from the third voltage to the first voltage. The second voltage is greater than the first voltage and the second voltage is maintained for a first period. The third voltage is greater than the second voltage and the third voltage is maintained for a second period. The gate select signal is driven by the gate select control circuitry on gate lines of the display device to select one or more subpixels of the display device for display updating.

Abstract: An input device is disclosed. The input device includes: multiple sensor electrodes; and a processing system configured to: modulate a first sensor electrode of the multiple sensor electrodes with a guard signal; and mitigate electromagnetic emissions resulting from modulating the first sensor electrode with the guard signal by modulating a circuit element with an inverted version of the guard signal.

Abstract: A processing system includes a sensor module and a determination module. The sensor module is configured to perform a capacitive scan using electrodes disposed in a display device in a first area. The determination module is configured to determine, using the capacitive scan, a bending response of an input surface covering the first area and a second area. The bending response results from an input force being applied to the input surface in the second area. The determination module is further configured to determine, using the bending response, a force estimate of the input force, and determine, based on the force estimate, whether to perform an interface action.

Abstract: A system and method for reducing electromagnetic interference of a display device. The display device may have a plurality of gate electrodes and a plurality of common electrodes. Further, the display device includes a processing system that is configured to drive a first gate electrode of a plurality of gate electrodes of the display device with a first gate select signal to select first subpixels for updating during a first period. The processing system further comprises driving a first common electrode proximate the first gate electrode with a reference signal during the first period. Further, the processing system is configured to drive a second common electrode with a first interference reduction signal during the first period to reduce the electromagnetic interference of the display device.

Abstract: A method for determining an amount of ambient light illumination is disclosed. The method includes: estimating a contribution per color component in an optical sensing region of an input frame to be displayed on a display device, wherein the optical sensing region corresponds to a location of an optical sensor in the display device, wherein the input frame comprises digital information for each color component for each pixel of the input frame; causing the optical sensor to detect an amount of illumination in the optical sensing region based on illuminating the display device with a representation of the input frame; and determining the amount of ambient light illumination based on the estimated contribution per color component in the optical sensing region of the input frame and the amount of illumination in the optical sensing region detected by the optical sensor.

Abstract: An example method of illuminating an optical fingerprint sensor integrated with a display, where the display includes a fingerprint (FP) pixel region and an outer pixel region exclusive of the FP pixel region, is described. The method includes: processing image data in display driver circuitry configured to drive the display to present an image; adjusting a first brightness setting, during the processing of the image data, corresponding to both the FP pixel region and the outer pixel region to provide illumination for the optical fingerprint sensor; and adjusting a second brightness setting, during the processing of the image data, corresponding to only the outer pixel region.

Abstract: A sensing device comprises sensor electrodes arranged in an array of rows and columns, and vias. A first vias is arranged in a first direction, and corresponds to a first column of sensor electrodes adjacent to a first side edge of the sensing device. A second via is arranged in a second direction different than the first direction, and corresponds to a second column of the sensor electrodes adjacent to a second side edge of the sensing device. Each of the sensor electrodes is configured to be coupled to a routing trace through one of the vias. In a first row of the plurality of sensor electrodes, a two vias are different distances from the first side edge and in a second row of the plurality of sensor electrodes, two vias are different distances from the second side edge.

Abstract: A system and method for input sensing comprises a display device having at least one piezoresistive sensing transistor. During a first period, a first resulting signal is received with a first data line by driving a first piezoresistive sensing transistor of a first subpixel of the display device with a first select signal. The first resulting signal corresponds to a change in resistance of the first piezoresistive sensing transistor. Further, at least one of force information and positional information associated with an input object may be determined at least partially based on the change in resistance.

Abstract: An input device may include various sensor electrodes that define various sensor pixels. The input device may further include a processing system coupled to the sensor electrodes. The processing system may obtain a first resulting signal and a second resulting signal from the sensor electrodes. The processing system may determine, using the first resulting signal, an in-phase estimate of a phase delay at a sensor pixel among the sensor pixels. The processing system may determine, using the second resulting signal, a quadrature estimate of the phase delay at the sensor pixel. The processing system may determine, based at least in part on the in-phase estimate and the quadrature estimate, a phase baseline estimate of the sensor pixels.

Abstract: A method of capacitive sensing may include performing, using the matrix electrode array, a transcapacitive scan to detect an input object in a sensing region of the input device. The method may further include determining, using the transcapacitive scan, positional information regarding a location of the input object in the sensing region. The method may further include determining, using the positional information, a sub-region of the matrix electrode array. The method may further include performing an absolute capacitive scan using the sub-region of the matrix electrode array. The method may further include determining, using the absolute capacitive scan, object information regarding the location of the input object in the sensing region.

Abstract: Embodiments described herein include a method, processing system, and input device having a display device with an integrated sensing device. The method comprises selecting, using first gate driver circuitry, a first subset of a first plurality of gate electrodes of the display device for performing display updating during a first period. The method further comprises selecting, using second gate driver circuitry, a first subset of a second plurality of gate electrodes of the display device for display updating during a second period. The method further comprises operating, during a third period between the first and second periods, at least a first sensor electrode of a plurality of sensor electrodes for capacitive sensing.

Abstract: An input device may include various sensor electrodes that define various sensor pixels. The input device may further include a processing system coupled to the sensor electrodes. The processing system may obtain a first resulting signal and a second resulting signal from the sensor electrodes. The processing system may determine, using the first resulting signal, an in-phase estimate of a phase delay at a sensor pixel among the sensor pixels. The processing system may determine, using the second resulting signal, a quadrature estimate of the phase delay at the sensor pixel. The processing system may determine, based at least in part on the in-phase estimate and the quadrature estimate, a phase baseline estimate of the sensor pixels.

Abstract: Embodiments described herein include a method and apparatus for capacitive sensing in input devices integrated with a display device. In one example, an input device is provided that includes a display device, a plurality of transmitter electrodes integrated with the display device, and a processing system. The plurality of transmitter electrodes include at least a first transmitter electrode and a second transmitter electrode. The first transmitter electrode includes a plurality of transmitter electrode segments. The plurality of transmitter electrode segments includes at least a first transmitter electrode segment connectable with a second transmitter electrode segment.

Abstract: A capacitive sensing device has a first plurality of sensor electrodes, and a second plurality of sensor electrodes overlapping the first plurality of sensor electrodes. A first sensor electrode of the second plurality of electrodes overlaps a first subset of the first plurality of electrodes and comprises apertures disposed according to first codes. The first codes comprise first and second coefficients and along one of the first plurality of sensor electrodes. Each aperture may correspond to one of the first coefficients. The capacitive sensing device further comprises a processing system coupled to the first and second plurality of sensor electrodes. The processing system may be configured to receive resulting signals with the second plurality of sensor electrodes to determine positional information for an input object within a sensing region of the capacitive sensing device.

Abstract: A method may include determining a display control signal for a display pixel in a display device. The method may further include determining a capacitive sensing control signal that corresponds to a capacitive scan for a sensing region. The capacitive scan may detect a location of an input object in a sensing region using various sensing elements disposed in the display device. The method may further include generating a multiplexed signal that includes the display control signal and the capacitive sensing control signal. The multiplexed signal may cause, using a demultiplexer disposed in the display device, the display device to perform the capacitive scan and update the display pixel.

Abstract: An example method of illuminating an optical fingerprint sensor integrated with a display, where the display includes a fingerprint (FP) pixel region and an outer pixel region exclusive of the FP pixel region, is described. The method includes: processing image data in display driver circuitry configured to drive the display to present an image; adjusting a first brightness setting, during the processing of the image data, corresponding to both the FP pixel region and the outer pixel region to provide illumination for the optical fingerprint sensor; and adjusting a second brightness setting, during the processing of the image data, corresponding to only the outer pixel region.

Abstract: An input device is disclosed. The input device includes: multiple sensor electrodes; and a processing system configured to: modulate a first sensor electrode of the multiple sensor electrodes with a guard signal; and mitigate electromagnetic emissions resulting from modulating the first sensor electrode with the guard signal by modulating a circuit element with an inverted version of the guard signal.

Abstract: Embodiments herein describe input devices that include receivers for sampling capacitive sensing signals. In one embodiment, the receivers perform continuous demodulation where the sampling of the capacitive sensing signal is not synchronized with the modulated signal applied to the sensor. To calibrate, the receiver generates first and second measurements of the capacitive sensing signal when driving a modulated signal onto one or more sensor electrodes during two respective time periods. However, the phase of at least one signal is controlled during the time periods so that the first and second measurements have a phase difference of ninety degrees. Using the first and second measurements, the receiver can determine a phase offset between the capacitive sensing signal and the modulated signal which can be used to alter future measurements so that at least some of these measurements are captured when the capacitive sensing signal is at a peak amplitude.