Abstract: Embodiments described herein include a display device having a capacitive sensing device, a processing system and a method for detecting presence of an input object using a capacitive sensing device, all of which include a grid electrode for improved absolute sensing. Other embodiments include a display device having a capacitive sensing device, a processing system and a method for detecting presence of an input object using a capacitive sensing device, wherein the capacitive sensing device includes a matrix of discrete sensor electrodes.

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: Embodiments described herein include a display device having a capacitive sensing device, a processing system and a method for detecting presence of an input object using a capacitive sensing device, all of which include a grid electrode for improved absolute sensing. Other embodiments include a display device having a capacitive sensing device, a processing system and a method for detecting presence of an input object using a capacitive sensing device, wherein the capacitive sensing device includes a matrix of discrete sensor electrodes.

Abstract: Embodiments of the invention generally provide an input device with display screens that periodically update (refresh) the screen by selectively driving electrodes corresponding to pixels in a display line, while also using the display screen as a touch area for capacitive sensing. To do this, the input device uses common electrodes for both updating the display and performing capacitive sensing, and interleaves periods of capacitive sensing between periods of updating the display lines (and pixels) based on a display frame. To avoid noise and mitigate interference during capacitive sensing, the input device may switch which windows of time in a display frame are used as capacitive sensing periods based on measurements of interference.

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: Embodiments described herein include a method and apparatus for capacitive sensing in input devices integrated with a display device. In one embodiment, a processing system for a display device comprising an integrated capacitive sensing device is provided that includes a display driver module, a transmitter module, and a receiver module. The display driver and transmitter modules are configured to operate in a display update mode and a sleep mode. The receiver module is configured to, while operating in a doze mode, communicate with and trigger the transmitter module to enter the active sensing mode while the display driver module remains in the sleep mode when presence of an object is detected based on the resulting signals.

Abstract: A display device having an integrated capacitive sensing device includes receiver electrodes disposed on a back side of a color filter glass. Transmitter electrodes of the capacitive sensing device are configured with a size and geometry that reduces the capacitive coupling between the transmitter and receiver electrodes. The transmitter electrodes may be made of one or more prongs or segments from a segmented common electrode.

Abstract: Embodiments of the present invention generally provide a display line selection system. The display line selection system includes a first register element configured to select a first gate electrode to update a first display line during a first display update period and transfer charge to a second register element during the first display update period. The second register element is configured to select a second gate electrode to update a second display line during a second display update period. The display line selection system further includes a third register element configured to receive charge during a non-display update period and transfer charge to a fourth register element during the non-display update period. The fourth register element is configured to select a third gate electrode to update a third display line during a third display update period.

Abstract: Embodiments of the present invention generally provide a processing system for a display device integrated with a capacitive sensing device. The processing system includes a driver module, a receiver module, and a determination module. The driver module is coupled to a plurality of common electrodes configured to be driven for display updating and capacitive sensing. The receiver module is coupled to a plurality of receiver electrodes and configured for receiving resulting signals with the receiver electrodes. The determination module is configured for comparing a delta capacitive image to one or more saturation capacitance values and replacing the saturation capacitance values with one or more capacitance values from the delta capacitive image. The determination module is further configured for determining calibration values based on the saturation capacitance values. The calibration values calibrate for an air gap defined between a cover lens of a display device and the plurality of common electrodes.

Abstract: A method and apparatus for operating an input device having a touch sensor and associated display device is discussed. While performing touch sensing, inactive transmitter electrodes of the touch sensor are electrically floated, and one or more source lines from the display device are operated to achieve shielding against interference, such as that coming from a backlight underneath the touch sensor.

Abstract: A method for detecting interference in an input device, the method involving: driving a transmitter signal onto a transmitter sensor electrode of the input device; receiving a resulting signal from a receiver sensor electrode of the input device; sampling a first value associated with the resulting signal during a first half of a sensing cycle; sampling a second value associated with the resulting signal during a second half of the sensing cycle; generating an interference value based on the first value and the second value; determining, based on the first value and the second value, an input in a sensing region of the input device; and comparing the interference value to a noise threshold.

Abstract: An input device comprises a first and second pluralities of capacitive sensor electrodes. The first plurality of capacitive sensor electrodes is oriented along a first axis, disposed in a first layer, and configured to update a display screen of the input device. The second plurality of capacitive sensor electrodes is oriented along a second axis that differs from the first axis. A display region of the display screen has a first dimension along the first axis and a second dimension the second axis. At least one sensor electrode of the first plurality of capacitive sensor electrodes extends fully across the first dimension of the display region. Individual sensor electrodes of the second plurality of capacitive sensor electrodes do not extend fully across the second dimension of the display region.

Abstract: Embodiments of the present invention generally provide a processing system for a display device integrated with a capacitive sensing device. The processing system includes a driver module, a receiver module, and a determination module. The driver module is coupled to a plurality of common electrodes configured to be driven for display updating and capacitive sensing. The receiver module is coupled to a plurality of receiver electrodes and configured for receiving resulting signals with the receiver electrodes. The determination module is configured for comparing a delta capacitive image to one or more saturation capacitance values and replacing the saturation capacitance values with one or more capacitance values from the delta capacitive image. The determination module is further configured for determining calibration values based on the saturation capacitance values. The calibration values calibrate for an air gap defined between a cover lens of a display device and the plurality of common electrodes.

Abstract: In a method of operating a touch screen, an object interaction is detected with the touch screen while in a first doze mode. It is determined if a detected object interaction with the touch screen is a valid input object interaction with the touch screen. In response to determining the object interaction is a valid input object interaction, the touch screen is transitioned from the first doze mode to a gesture recognition mode. The touch screen is transitioned from the gesture recognition mode to an active mode in response to a determination of a valid gesture interaction with the touch screen by the input object.

Abstract: Embodiments of the present invention generally provide a processing system for a display device integrated with a capacitive sensing device. The processing system includes a driver module having driver circuitry and coupled to a sub-pixel with a first source line and a first common electrode. The driver module is configured to simultaneously update the sub-pixel by driving the first source line with a first voltage, and drive the first common electrode for capacitive sensing by modulating the first common electrode between a second voltage and a third voltage. The processing system further includes a receiver module coupled to a plurality of receiver electrodes. The receiver module is configured to receive resulting signals from the receiver electrodes while the first common electrode is modulated between the second voltage and the third voltage. The processing system further includes a determination module configured to determine positional information based on the resulting signals.

Abstract: Embodiments of the invention generally provide an input device with display screens that periodically update (refresh) the screen by selectively driving electrodes corresponding to pixels in a display line. In addition to updating the display, the input device may perform capacitive sensing using the display screen as a touch area. To do this, the input device uses common electrodes for both updating the display and performing capacitive sensing, and interleaves periods of capacitive sensing between periods of updating the display lines (and pixels) based on a display frame. To avoid noise and mitigate interference during capacitive sensing, the input device may change the capacitive frame rate relative to the display frame rate based on measurements of interference. The changed capacitive frame rate may result in re-timed periods of capacitive sensing based on each display frame.

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.

Abstract: The embodiments described herein thus provide devices and methods that facilitate improved input devices. Specifically, the devices, systems and methods provide the ability to accurately determine user input using multiple different sensing regimes. The different sensing regimes can be used to facilitate accurate position determination of objects both at the surface and away from the surface. For example, the different sensing regimes can be used to determine position information for both ungloved and gloved fingers. In one embodiment the first sensing regime uses a first duty cycle of absolute capacitive sensing and a first duty cycle of transcapacitive sensing. The second sensing regime uses a second duty cycle of absolute capacitive sensing and a second duty cycle of transcapacitive sensing, where the second duty cycle of absolute capacitive sensing is greater than the first duty cycle of absolute capacitive sensing.

Abstract: Embodiments of the present invention generally provide a processing system for a display device having an integrated sensing device. The processing system includes a driver module coupled to a plurality of transmitter electrodes. Each transmitter electrode includes one or more common electrodes configured for display updating and input sensing. The driver module is configured for selecting a first display line set for display updating during a first display update period and driving the first display line set for display updating during the first display update period. The driver module is further configured for driving one or more transmitter electrodes of the plurality of transmitter electrodes for input sensing during a non-display update period and selecting a second display line set for display updating during a restart period.