Abstract: A touch-sensitive display device includes a capacitance-based touch sensor including a plurality of electrodes, a display including a plurality of pixels, an image source configured to output image frames at a video frame rate, and a controller. The controller is configured to perform capacitance measurements on the capacitance-based touch sensor in capacitance-measurement intervals of a touch-sensing frame, and perform display-write operations on the display to write each image frame to the display in display-write intervals of the touch-sensing frame that do not temporally overlap with the capacitance-measurement intervals of the touch-sensing frame. The controller is configured repeat the touch-sensing frame at a fixed touch-sensing frame rate that is different than the video frame rate.

Abstract: A method includes detecting presence of a handheld device in proximity of a touch enabled device and negotiating communication capabilities between the handheld device and a digitizer system of the touch enabled device. At least one of the handheld device and the digitizer system is configured to match a defined communication capability of the other of the at least one of the handheld device and digitizer system. Input from the handheld device is tracked via an electrostatic communication channel between the handheld device and the digitizer system based on the defined communication configuration.

Abstract: The disclosure herein describes causing a computing device to transition from a low power state using a pen device. The pen device obtains gesture input data from at least one sensor of the pen device and the obtained gesture input data is compared to at least one gesture pattern. Based on the gesture input data matching the at least one gesture pattern, the pen device generates a wakeup event message. The pen device transmits the wakeup event message to the computing device using a communication protocol that the computing device is configured to receive in the low power state. The described power state transition method provides a flexible, customizable way for users to wake up computing devices using the pen device.

Abstract: A keyboard has a keypad layer of resiliently depressible keypads. The keyboard has a skin of dielectric material, covering a base of the keyboard. The skin contacts a capacitive touchscreen in use, and an actuating layer is on a face of the skin of dielectric material away from the base. The actuating layer comprises a plurality of conductive regions, one per keypad. A grounding layer is between the actuating layer and the keypad layer and spaced from the actuating layer during a rest state of the keyboard. Upon depression of a keypad, the keypad presses a region of the grounding layer under the keypad towards a region of the actuating layer such that the region of the actuating layer becomes grounded and causes a change in capacitance detectable by the capacitive touchscreen.

Abstract: A mechanical keyboard for use on a touch screen comprises an individually and resiliently depressible key and a network of electrical conductors. They key includes a user-facing outer portion and a screen-facing, electrically conductive inner portion, the inner portion being configured to approach the touch screen during depression of the key. The network of electrical conductors is configured to conduct a drive signal to the inner portion of the key, the drive signal being received, during the depression of the key, at a locus of touch screen directly beneath the key.

Abstract: Signals are transmitted from a plurality of regions of an electronic device. Location information is then received from an electronic pen in proximity to the electronic device. The location information is determined by the electronic pen and corresponds to a location of the electronic pen relative to the screen of the electronic device. The location information is determined using one or more of the transmitted signals received by the electronic pen. A display on the screen of the electronic device is controlled based at least in part on the received location information. A more efficient pen operating state is thereby provided that improves the user experience by more accurately and reliably determining the pen location in space.

Abstract: The disclosure herein describes changing a mode of operation of a computing device using signals from a pen device. The pen device obtains gesture input data from at least one sensor of the pen device and the obtained gesture input data is compared to at least one gesture pattern. Based on the gesture input data matching the at least one gesture pattern, the pen device transitions to an active state. The pen device detects, via an electrostatic communication channel, an uplink signal from the computing device and sends a signal to change a mode of operation of the computing device by at least one of a network interface or a communication channel, other than the electrostatic communication channel. Changing modes of operation of a computing device provides a flexible, stream-lined way to enhance the user experience of using a computing device with a pen device (e.g., performing an initial pairing process).

Abstract: The disclosure herein describes causing a computing device to transition from a low power state using a pen device. The pen device obtains gesture input data from at least one sensor of the pen device and the obtained gesture input data is compared to at least one gesture pattern. Based on the gesture input data matching the at least one gesture pattern, the pen device generates a wakeup event message. The pen device transmits the wakeup event message to the computing device using a communication protocol that the computing device is configured to receive in the low power state. The described power state transition method provides a flexible, customizable way for users to wake up computing devices using the pen device.

Abstract: A mechanical keyboard for use on a touch screen comprises an individually and resiliently depressible key and a network of electrical conductors. They key includes a user-facing outer portion and a screen-facing, electrically conductive inner portion, the inner portion being configured to approach the touch screen during depression of the key. The network of electrical conductors is configured to conduct a drive signal to the inner portion of the key, the drive signal being received, during the depression of the key, at a locus of touch screen directly beneath the key.

Abstract: The disclosure is related to context driven interactions between a host computing device having a digitized surface and a client device. During a touch interaction, the host computing device detects a touch on the digitized surface and receives a client identifier from the client device. In an implementation, the host computing device may respond to a touch interaction in a context driven manner. The host computing device may determine an event based on a context of the touch interaction. The context may include, for example, the location (e.g., coordinates) of the touch, the client identifier received during the touch interaction, and an active application on the host computing device during the touch interaction. Based on the determined event, the host computing device may request specific information regarding the client device. The specific information may be selected by the host computing device based on the determined event.

Abstract: An electronic device and method is disclosed that determines a fold angle and/or opening state of a foldable electronic device using a self-capacitance measurement of an electrode disposed in the foldable electronic device. Using self-capacitance to determine the opening state provides an accurate result and makes efficient use of power of the foldable electronic device. Further, the technique offers flexibility in the implementation, as it can make use of electrodes, sensors, and/or antennas already present in many foldable electronic devices.

Abstract: A method for identifying an error in a tip status indication from a stylus includes detecting input from a stylus with a digitizer sensor via an electrostatic (ES) wireless communication channel established between said stylus and said digitizer sensor. An indication of a tip status is received from the stylus, indicating whether the tip status is in hover or touch. The tip status is verified based on input detected with the digitizer sensor. When an error is identified in the tip status indication, a notification of the error is sent.

Abstract: A system for automated user input alignment receives the user input at a touchscreen display. A skew of the user input is identified as the user input is being received at a touchscreen display. A skew correction is determined based on the identified skew. The skew correction is applied to the user input to align the user input on the touchscreen display. The skew correction applied in an automated alignment process that. The user input is displayed with the applied skew correction on the touchscreen display with improved efficiency and without user manipulation to perform the alignment.

Abstract: A system includes a display integrated with a digitizer sensor, a handheld device configured to transmit a signal to the digitizer sensor based on a defined protocol, a power supply and a controller. The controller is configured to sample output from the digitizer sensor, detect parameters characterizing noise from at least one of the display and the power supply, characterize a noise environment on the digitizer sensor based on the parameters detected and provide instructions to alter a transmission protocol of the handheld device based on the noise environment.

Abstract: The presently disclosed technology uses predefined handwriting characteristics to create and/or refine a stylus position interpolation function over time to provide more accurate and adaptive renderings of the user's handwriting on a touch screen. As the presently disclosed technology is performed on a specific device and uses data collected from one or more specific users, it adapts the stylus position interpolation function for any device-specific or user-specific variations. Further, as the stylus position interpolation function adapts iteratively over time, it may not converge and continues to adapt as the device ages, the user's habits change, or identify of the user changes, and environmental conditions of the device change.

Abstract: A keyboard has a keypad layer of resiliently depressible keypads. The keyboard has a skin of dielectric material, covering a base of the keyboard. The skin contacts a capacitive touchscreen in use, and an actuating layer is on a face of the skin of dielectric material away from the base. The actuating layer comprises a plurality of conductive regions, one per keypad. A grounding layer is between the actuating layer and the keypad layer and spaced from the actuating layer during a rest state of the keyboard. Upon depression of a keypad, the keypad presses a region of the grounding layer under the keypad towards a region of the actuating layer such that the region of the actuating layer becomes grounded and causes a change in capacitance detectable by the capacitive touchscreen.

Abstract: A display device includes a display controller and a timing controller to drive frames at a frame rate onto a display. The display device may include sensor circuitry to detect a signal from a pen. The signal from the pen includes a sync signal indicative of a repetition rate of the signal. In one embodiment, the sync signal and the display timer are asynchronous. The sensor circuitry is configured to sense the signal from the pen during sensing windows, where timing of the sensing windows is based on the repetition rate. In one embodiment, the display controller is configured to pause driving a frame onto the display during the sensing windows.

Abstract: Present disclosure provides techniques to compensate for the above-identified signal processing delays between an in-cell digitizer of the touch screen display system and a stylus (or pen). In one example, the delays may be compensated by estimating the stylus-digitizer phase error on the digitizer side and adjusting for the delay accordingly. Specifically, in this example, the digitizer may utilize a quadratic receiver to perform an in-phase and quadratic detection in time domain in order to estimate the phase error. Based on the in-phase and quadratic detection, the digitizer may adapt the subsequent stylus sampling windows to compensate for the detected phase error. In another example, the stylus may transmit a first signal and a second signal that is 90 degrees delayed during a predetermined time slot, and to adapt the stylus sampling windows on the digitizer side in order to compensate for the phase delay.

Abstract: Present disclosure provides techniques to compensate for the above-identified signal processing delays between an in-cell digitizer of the touch screen display system and a stylus (or pen). In one example, the delays may be compensated by estimating the stylus-digitizer phase error on the digitizer side and adjusting for the delay accordingly. Specifically, in this example, the digitizer may utilize a quadratic receiver to perform an in-phase and quadratic detection in time domain in order to estimate the phase error. Based on the in-phase and quadratic detection, the digitizer may adapt the subsequent stylus sampling windows to compensate for the detected phase error. In another example, the stylus may transmit a first signal and a second signal that is 90 degrees delayed during a predetermined time slot, and to adapt the stylus sampling windows on the digitizer side in order to compensate for the phase delay.

Abstract: The presently disclosed technology uses predefined handwriting characteristics to create and/or refine a stylus position interpolation function over time to provide more accurate and adaptive renderings of the user's handwriting on a touch screen. As the presently disclosed technology is performed on a specific device and uses data collected from one or more specific users, it adapts the stylus position interpolation function for any device-specific or user-specific variations. Further, as the stylus position interpolation function adapts iteratively over time, it may not converge and continues to adapt as the device ages, the user's habits change, or identify of the user changes, and environmental conditions of the device change.