Abstract: Methods, systems and devices are described for detecting a position-based attribute of a finger, stylus or other object with a touchpad or other sensor having a touch-sensitive region that includes a plurality of electrodes. Modulation signals for one or more electrodes are produced as a function of any number of distinct digital codes. The modulation signals are applied to an associated at least one of the plurality of electrodes to obtain a resultant signal that is electrically affected by the position of the object. The resultant signal is demodulated using the plurality of distinct digital codes to discriminate electrical effects produced by the object. The position-based attribute of the object is then determined with respect to the plurality of electrodes from the electrical effects.

Abstract: A processing system, input device, and method are disclosed to detect an active input device. The method includes operating a first portion of a plurality of sensor electrodes to receive an active input signal from an active input device, and operating a second portion of the plurality of sensor electrodes to receive capacitive sensing data corresponding to a passive input device. The first and second portions include at least one sensor electrode in common. The method also includes driving a plurality of display electrodes to update a display image, wherein the plurality of sensor electrodes includes at least one of the plurality of display electrodes.

Abstract: A touch sensor device is provided that uses a flexible circuit substrate to provide an improved input device. Specifically, the present invention uses a touch sensor controller affixed to the flexible circuit substrate, which is coupled to a sensor component to provide a flexible, reliable and cost effective touch sensor suitable for a wide variety of applications. In one embodiment the touch sensor uses a flexible circuit substrate that provides relatively high temperature resistance. This allows the touch sensor controller to be affixed using reliable techniques, such as various types of soldering. The sensor component can comprise a relatively low-temperature-resistant substrate that can provide a cost effective solution. Taken together, this embodiment of the touch sensor provides reliability and flexibility at relatively low cost.

Abstract: Embodiments of the invention generally provide an input device having a smaller overall physical size and a lower production cost, and is minimally affected by electrical interference versus conventional input devices. Embodiments discussed herein include an input device that has a sensor controller disposed in close proximity to a plurality of sensing elements that are used to sense and acquire positional information of an input object. In one embodiment, the sensor controller and at least portions of the sensor electrodes are disposed between two transparent substrates that are positioned near a display device. In some embodiments, the sensor controller is disposed in an edge region of a substrate which has a sensing region through which the adjacently positioned sensor electrodes are configured to sense the presence of an input object.

Abstract: Embodiments of the disclosure provided herein provide a device and method of using the device that is able to improve the detection of user input provided to an input device while one or more sources of noise are present during the detection process. One or more of the embodiments disclosed herein may include a scanning process and a signal processing technique that is able to more reliably detect the presence and position of an input object by reducing the effect of noise on a resulting signal that is generated during a capacitive sensing process. In some configurations, the scanning and signal processing techniques disclosed herein can be improved by increasing a capacitive sensing device's ability to detect the presence of an input object by improving the signal-to-noise ratio of the data collected during a capacitive sensing process.

Abstract: Techniques for removing display-based corrupting components from a capacitive sensing signal when display and capacitive sensing is performed at or nearly at the same time. A routing carrying display related signals (e.g., a source signal for sub-pixel updating) may induce a corrupting current into a routing for carrying capacitive sensing signals. This corrupting current would reduce the ability to determine presence of an input object via the sensing signal. Therefore, the corrupting signal is effectively removed by averaging sensing signals from two consecutive frames together. Because displays perform frame inversion, in which the voltage polarity provided to a sub-pixel for updates is reversed each frame, the corrupting current reverses in polarity each frame. Therefore, adding two subsequent frames together cancels out the corrupting signal.

Abstract: A chip-on-glass device comprises a chip-on-glass substrate, a metal layer, and a plurality of chip-on-glass connection bumps. The metal layer comprises a plurality of passive jumper routing traces. The plurality of chip-on-glass connection humps is coupled with passive jumper routing traces of the plurality of passive jumper routing traces.

Abstract: Techniques for removing display-based corrupting components from a capacitive sensing signal when display and capacitive sensing is performed at or nearly at the same time. A routing carrying display related signals (e.g., a source signal for sub-pixel updating) may induce a corrupting current into a routing for carrying capacitive sensing signals. This corrupting current would reduce the ability to determine presence of an input object via the sensing signal. Therefore, the corrupting signal is effectively removed from a signal received from a sensor electrode when driven for sensing. The corrupting component may be removed either in analog or digitally. In analog, the corrupting component is removed via a tunable capacitance. Digitally, a corrupting component is calculated as an impulse response convolved with the source driver voltage. This corrupting component is then subtracted from a digital value output by the sensing circuitry to obtain a “clean” value.

Abstract: Techniques for removing display-based corrupting components from a capacitive sensing signal when display and capacitive sensing is performed at or nearly at the same time. A routing carrying display related signals (e.g., a source signal for sub-pixel updating) may induce a corrupting current into a routing for carrying capacitive sensing signals. This corrupting current would reduce the ability to determine presence of an input object via the sensing signal. Therefore, the corrupting signal is effectively removed by averaging sensing signals from two consecutive frames together. Because displays perform frame inversion, in which the voltage polarity provided to a sub-pixel for updates is reversed each frame, the corrupting current reverses in polarity each frame. Therefore, adding two subsequent frames together cancels out the corrupting signal.

Abstract: Embodiments of the present invention generally provide shield electrodes for shielding one or more conductive routing traces from one or more receiver electrodes in an input device comprising a display device integrated with a sensing device to reduce the capacitive coupling between the conductive routing traces and the receiver electrodes. The shield electrode may be configured to reduce the effect of an input object on the capacitive coupling between the conductive routing traces and the receiver electrodes. In other embodiments, end portions of common electrodes shield the receiver electrodes from the conductive routing traces, thereby reducing the capacitive coupling between the receiver electrodes and the conductive routing traces.

Abstract: An input device having an anti-static layer coupled to a grounding element such as a cellphone bottom chassis via a current hindering circuit having a resistive circuit element. Without the current hindering circuit having a resistive circuit element, a large amount of the current from an input object would flow through the connection to the grounding element and would not flow to a receiver channel for processing. This decreases the signal strength within the receiver channel, making sensing more difficult to perform. However, with the current hindering circuit having a resistive circuit element, current is hindered from flowing to ground and thus flows to the receiver channel, thereby increasing the signal strength. The current hindering circuit having a resistive circuit element may be a resistor or a Zener diode that is directed to prevent current flow from the anti-static layer to the grounding element until a significant voltage has built up across the Zener diode.

Abstract: In an example, a processing system for a capacitive sensing device includes a sensor module and a determination module. The sensor module includes sensor circuitry coupled to a plurality of transmitter electrodes and a plurality of receiver electrodes. The sensor module is configured to receive resulting signals from the plurality of receiver electrodes during a plurality of noise acquisition bursts while suspending transmission with the plurality of transmitter electrodes. The resulting signals include the effects of noise. The sensor module is further configured to introduce at least one time delay between a respective at least one pair of the plurality of noise acquisition bursts. The determination module is configured to determine an interference measurement for a first frequency based on the resulting signals.

Abstract: A touch sensor device is provided that uses a flexible circuit substrate to provide an improved input device. Specifically, the present invention uses a touch sensor controller affixed to the flexible circuit substrate, which is coupled to a sensor component to provide a flexible, reliable and cost effective touch sensor suitable for a wide variety of applications. In one embodiment the touch sensor uses a flexible circuit substrate that provides relatively high temperature resistance. This allows the touch sensor controller to be affixed using reliable techniques, such as various types of soldering. The sensor component can comprise a relatively low-temperature-resistant substrate that can provide a cost effective solution. Taken together, this embodiment of the touch sensor provides reliability and flexibility at relatively low cost.

Abstract: Embodiments of the invention generally provide a method and apparatus that is configured to reduce the effects of interference that is undesirably provided to a transmitter signal that is delivered from a transmitter signal generating device to a sensor processor to determine if an input object is disposed within a touch sensing region of a touch sensing device. In one embodiment, the sensor processor includes a receiver channel that has circuitry that is configured to separately receive a transmitter signal delivered from a display processor and a sensor processor reference signal that is based on a display processor reference signal to reliably sense the presence of an object. Embodiments of the invention described herein thus provide an improved apparatus and method for reliably sensing the presence of an object by a touch sensing device.

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.

Abstract: An electrode matrix that is used for capacitive sensing may be integrated into a display panel of an input device. In one embodiment, source drivers may be mounted on the display panel which drive the display signals and capacitive sensing signals into the display panel. In one embodiment, the capacitive sensing signals may be routed on traces or lines that are interleaved on the same layer as the source lines used for setting a voltage on the pixels in the display panel during display updating. Using the interleaved traces, the source drivers may drive the capacitive sensing signals in parallel to a plurality of the electrodes in the matrix in a predefined pattern that spans one or more sensing cycles.

Abstract: An electrode matrix that is used for capacitive sensing may be integrated into a display panel of an input device. In one embodiment, source drivers may be mounted on the display panel which drive the display signals and capacitive sensing signals into the display panel. In one embodiment, the capacitive sensing signals may be routed on wires or lines that are interleaved on the same layer as the source lines used for setting a voltage on the pixels in the display panel during display updating. Using the interleaved wires, the source drivers may drive the capacitive sensing signals in parallel to a plurality of the electrodes in the matrix in a predefined pattern that spans one or more touch cycles.

Abstract: This disclosure generally provides an input device modulates a reference voltage used to provide power to a plurality of power supplies and acquires, while modulating the reference voltage, first resulting signals from a plurality of sensor electrodes simultaneously at a central receiver. In input device also acquires second resulting signals from the sensor electrodes at a plurality of local receivers and mitigates an effect a grounding condition has on the second resulting signal using the first resulting signals.

Abstract: A display and touch driver architecture is described that includes a plurality of source drivers and a processing system. The processing system operates receivers within the source drivers to selectively receive sensing data from the receivers and determines positional information based on the sensing data. The processing system may selectively operate different source drivers in low power modes and/or for capacitive sensing based on the determined positional information.

Abstract: This disclosure generally provides a fingerprint sensor that derives a fingerprint by measuring capacitive sensing signals while modulating a reference voltage rail used to power the fingerprint sensor. In one embodiment, the fingerprint sensor is integrated into an electronic device which may include other components such as a display, I/O devices, speakers, and the like. To power these components, the electronic device may include a DC power supply which outputs reference voltages. When transmitting the reference voltages to the fingerprint sensor, the electronic device may modulate the voltages using a modulating signal. Because the reference voltages are used to power the components in the fingerprint sensor, modulating the rail voltages also causes the components coupled to the reference voltages to also modulate. While this modulation occurs, the fingerprint sensor measures resulting signals using a plurality of sensor electrodes which are then processed to derive a fingerprint.