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 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 method for touch detection on an ungrounded pen enabled device includes sampling output in a frequency range of a signal emitted from a stylus over a stylus sampling window, detecting touch input from a finger or hand based on detecting a gain between a touch threshold and a stylus threshold, wherein the touch threshold is below the stylus threshold over at least two consecutive columns and two consecutive rows of the sensor and reporting coordinates of the touch input based on detecting the touch input. Stylus input is detected based on detecting a gain above a stylus threshold in at least one column and one row of the sensor and coordinates of the stylus are reported based on stylus input being detected. Sampling is performed simultaneously from both columns and rows of a grid based capacitive sensor.

Abstract: A first set of classifier data and a different second set of classifier data are stored. Each of the first set and the second set is configured to differentiate between different types of touches on a touch sensitive screen including a capacitive based sensor. The first set is adapted to differentiate between different types of touches on a touch sensitive screen with no cover film added on the screen and the second set is adapted to differentiate between different types of touches when a cover film is added to the screen. The cover film is identified on the screen based on output from at least one conductive line or at least one array of conductive electrodes of the capacitive based sensor. The second set of classifier data is selected based on the identifying. A touch interaction is reported based on the second set of classifier data.

Abstract: A sensor includes a sensor layer patterned with conductive elements spread across the sensor layer and a resilient layer proximate to the sensor layer. The conductive elements are electrically isolated from one another. The sensor layer is configured for capacitive based sensing and to detect local compressions based on pressure applied to the resilient layer.

Abstract: A stylus includes a cylindrical shaped housing and a shell. The shell is rotatably connected to the housing. A cross-sectional area of the housing has a first dimension along a first axis and a second dimension along a second axis, the first axis perpendicular to the second axis. The first dimension is smaller than the second dimension. A cross-sectional area including both the shell and the housing has a third dimension along the first axis that is substantially the same as the first dimension while the shell is in a first position and substantially the same as the second dimension while the shell is in a second position.

Abstract: A first set of classifier data and a different second set of classifier data are stored. Each of the first set and the second set is configured to differentiate between different types of touches on a touch sensitive screen including a capacitive based sensor. The first set is adapted to differentiate between different types of touches on a touch sensitive screen with no cover film added on the screen and the second set is adapted to differentiate between different types of touches when a cover film is added to the screen. The cover film is identified on the screen based on output from at least one conductive line or at least one array of conductive electrodes of the capacitive based sensor. The second set of classifier data is selected based on the identifying. A touch interaction is reported based on the second set of classifier data.

Abstract: Examples are disclosed herein that relate to sensing touch input and applied force at a common sensor using a common controller. One example provides a touch sensor with (1) a plurality of electrodes forming a transmit electrode array and a receive electrode array; (2) drive circuitry configured to drive the transmit electrode array; (3) receive circuitry coupled to at least the receive electrode array; (4) and one or more jumpers electrically coupling respective pairs of the electrodes, the one or more jumpers having an electrical resistance that varies with applied force. The touch sensor may include a controller configured to determine, based on output from the receive circuitry, a location of a touch input and an applied force of the touch input based on a capacitance associated with the output and on a resistance associated with the output.

Abstract: Aspects described herein generally relate to a computing device and a corresponding input device. The computing device may include a housing including at least one component of the computing device. An input device can be removably attachable to at least a portion of the housing. The computing device may also include one or more electromagnets mounted within the housing, wherein the one or more electromagnets have a detach state that generates a first magnetic field in a direction that opposes a second magnetic field that attracts the input device to the housing.

Abstract: A stylus includes a stylus housing formed with a plurality of slots along a portion of the stylus that is gripped when writing with the stylus, a plurality of tabs located in the housing that can protrude through the plurality of slots and an actuator that actuates protrusion and receding of the plurality of tabs through the plurality of slots. Protrusion of the plurality the tabs through the plurality of slots increases a grip diameter of the stylus housing.

Abstract: A device comprising an electronic display, a digitizer sensor integrated with the electronic display and configured to track position of a stylus based on an electrostatic signal emitted by the stylus, an infrared (IR) emitter and a circuit configured to modulate the light emitted by the infrared emitter with data. The IR emitter is integrated with the electronic display and configured to emit infrared light in a field of view of the electronic display. The circuit together with the IR emitter is configured as a light communication channel for wirelessly transmitting the data to the stylus during interaction of the stylus with the digitizer sensor.

Abstract: A device includes an electronic display formed with a stackup of layers and an array of optical sensing elements embedded on at least one layer of the stackup or on a chassis of the electronic display and a circuit connected to the optical sensing elements. The circuit is configured to relate output from the optical sensing elements to pressure applied on the electronic display.

Abstract: Stylus communication channels are described. In implementations, a stylus includes multiple separate and distinct communication channels used to detect the stylus, resolve positions of the stylus and a user relative to a computing device, and exchange data with the computing device (e.g., transmit and receive communications). The stylus may include a first electrode arranged in a tip portion is and a second electrode arranged in a grip area configured to form different corresponding communication channels with the computing device through the tip and through the grip area and a user's hand/body, respectively. A processing system of the computing device, such as a CPU or microcontroller, implements a stylus control module configured to analyze signal patterns derived from signals communicated the first electrode and second electrode and detect the stylus and/or resolve positions of the stylus and a user relative to the computing device based on the analysis.

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: The structure and devices described herein provide an improved digital eraser for a stylus. A stylus may have an eraser end that transmits an erase signal from an eraser antenna. A cover houses the eraser antenna and can be configured with varying geometry to selectively position the eraser antenna closer to, or further away from, a digitizer screen of a computing device when the cover is in contact with the digitizer screen. The computing device can detect the signal strength of the erase signal and/or the contact area between the cover and the digitizer screen and vary one or more of the width, area, or opacity of the erase function. The computing device can further, based upon the strength of the signal and/or the contact area between the cover and the digitizer screen, determine the tilt and/or the rotation of the stylus.

Abstract: Aspects described herein generally relate to a computing device and a corresponding input device. The computing device may include a housing including at least one component of the computing device. An input device can be removably attachable to at least a portion of the housing. The computing device may also include one or more electromagnets mounted within the housing, wherein the one or more electromagnets have a detach state that generates a first magnetic field in a direction that opposes a second magnetic field that attracts the input device to the housing.

Abstract: Examples are disclosed herein that relate to sensing touch input and applied force at a common sensor using a common controller. One example provides a touch sensor with (1) a plurality of electrodes forming a transmit electrode array and a receive electrode array; (2) drive circuitry configured to drive the transmit electrode array; (3) receive circuitry coupled to at least the receive electrode array; (4) and one or more jumpers electrically coupling respective pairs of the electrodes, the one or more jumpers having an electrical resistance that varies with applied force. The touch sensor may include a controller configured to determine, based on output from the receive circuitry, a location of a touch input and an applied force of the touch input based on a capacitance associated with the output and on a resistance associated with the output.

Abstract: Stylus communication channels are described. In implementations, a stylus includes multiple separate and distinct communication channels used to detect the stylus, resolve positions of the stylus and a user relative to a computing device, and exchange data with the computing device (e.g., transmit and receive communications). The stylus may include a first electrode arranged in a tip portion is and a second electrode arranged in a grip area configured to form different corresponding communication channels with the computing device through the tip and through the grip area and a user's hand/body, respectively. A processing system of the computing device, such as a CPU or microcontroller, implements a stylus control module configured to analyze signal patterns derived from signals communicated the first electrode and second electrode and detect the stylus and/or resolve positions of the stylus and a user relative to the computing device based on the analysis.

Abstract: A device includes an electronic display supported in a display chassis, a digitizer sensor overlaid on the electronic display, a circuit configured to detected touch interaction with the digitizer sensor based on output sampled and a display controller configured to control output on the electronic display. The electronic display includes an electrostatic discharge (ESD) shield layer. The ESD shield layer is electrically connected to device ground and the impedance to the device ground of the ESD shield layer is configured to be sensitive to pressure applied on the digitizer sensor during user interaction. The digitizer sensor output is sensitive to the change in the impedance of ESD shield layer to the device ground.

Abstract: A device includes an electronic display supported in a display chassis, a digitizer sensor overlaid on the electronic display, a circuit configured to detected touch interaction with the digitizer sensor based on output sampled and a display controller configured to control output on the electronic display. The electronic display includes an electrostatic discharge (ESD) shield layer. The ESD shield layer is electrically connected to device ground and the impedance to the device ground of the ESD shield layer is configured to be sensitive to pressure applied on the digitizer sensor during user interaction. The digitizer sensor output is sensitive to the change in the impedance of ESD shield layer to the device ground.