A method implemented by a transmission device to communicate with multiple reception devices that respectively share a drawing area with the transmission device is provided. The transmission device transmits to the multiple reception devices vector-data ink data representative of traces of input operation detected by an input sensor of the transmission device. The method includes: (a) an ink data generation step of generating fragmented data of a stroke object, wherein the stroke object contains multiple point objects to represent a trace formed by a pointer, the fragmented data being generated per defined unit T, and generating a drawing style object; (b) a message formation step of generating messages including the drawing style object and the fragmented data; and (c) a transmission step of transmitting the messages.

A method for operating a two-dimensional touch array by providing virtual grid intersections. The techniques may be used to improve the array resolution. It may also be used to detect fingerprint ridge and valley detail even when the finger is not moving, and when the array node spacing is much greater than the ridge and valley spacing.

Disclosed is an electronic device including a display, a touch recognition sensor that recognizes a touch input on the display; a fingerprint recognition sensor that recognizes a fingerprint input on the display, and a processor coupled to the display, the touch recognition sensor, and the fingerprint recognition sensor, wherein the processor is configured to activate the touch recognition sensor, display at least one user interface that receives the fingerprint input on a fingerprint recognition area of the display, activate at least a portion of the fingerprint recognition sensor, and selectively deactivate a portion of the touch recognition sensor corresponding to the activated portion of the fingerprint recognition sensor.

An electronic device including a touch screen configured to display at least one graphic object for executing an operation on the electronic device; at least first and second magnetic sensors configured to detect a spatial position of an input device having a magnetic field generating unit; and a controller configured to in response to a touch applied to the graphic object using the input device for executing the operation, execute a hold mode of holding the execution of the operation while the spatial position of the input device is moved away from the touch screen while being maintained within a reference range, and release the hold mode and execute the operation when the spatial position of the input device is moved out of the reference range.

A touch sensor includes first electrodes extending in a first direction, second electrodes spaced apart from the first electrodes and extending in a second direction to cross the first electrodes, at least one pressure sensor arranged at an intersection between at least one of the first electrodes and at least one of the second electrodes, and a sensor controller electrically connected to the first electrodes, the second electrodes, and the pressure sensor. The sensor controller is configured to detect a variation in capacitance between the first electrodes and the second electrodes to sense a touch position during a first period and detect a variation in capacitance between the at least one of the first electrodes or the at least one of the second electrodes and the pressure sensor to sense a touch pressure during a second period.

A position detection device includes a position detection sensor and selection circuitry. The position detection sensor has first loop electrodes arranged in a first direction and second loop electrodes arranged in a second direction perpendicular to the first direction. The selection circuitry is coupled to the first loop electrodes of the position detection sensor and, in operation, simultaneously selects two of the first loop electrodes, connects a first terminal of each of the two of the first loop electrodes to a first one of two first common terminals, and connects a second terminal of each of the two of first loop electrodes to a second one of the two first common terminals. The two of the first loop electrodes change sequentially over time from a first two of the plurality of first loop electrodes to a last two of the plurality of first loop electrodes.

According to one aspect, a computer-implemented method for detecting an earthquake includes detecting vibrations in a trackpad of a computing device using an inductive element and force sensing circuitry of the trackpad and, processing, by a microcontroller of the computing device, the vibrations for detection of an earthquake vibration signal. In response to detecting the earthquake vibration signal, communicating, by the computing device, the earthquake vibration signal to a remote server and receiving, at the computing device, an earthquake alert from the remote server.

In one embodiment, a stylus with one or more electrodes and one or more computer-readable non-transitory storage media embodying logic for transmitting signals wirelessly to a device through a touch sensor of the device has one or more sensors for detecting movement of the stylus.

A touch sensor detector system and method incorporating an interpolated sensor array is disclosed. The system and method utilize a touch sensor array (TSA) configured to detect proximity/contact/pressure (PCP) via a variable impedance array (VIA) electrically coupling interlinked impedance columns (IIC) coupled to an array column driver (ACD), and interlinked impedance rows (IIR) coupled to an array row sensor (ARS). The ACD is configured to select the IIC based on a column switching register (CSR) and electrically drive the IIC using a column driving source (CDS). The VIA conveys current from the driven IIC to the IIC sensed by the ARS. The ARS selects the IIR within the TSA and electrically senses the IIR state based on a row switching register (RSR). Interpolation of ARS sensed current/voltage allows accurate detection of TSA PCP and/or spatial location.

A display device includes a display panel that includes a plurality of pixels, a touch panel that includes a plurality of driving lines and a plurality of sensing lines, a display driver that drives the display panel at a first display frame rate in a normal driving mode, and that drives the display panel at a second display frame rate lower than the first display frame rate in a low power driving mode, and a touch controller that drives the touch panel with a mutual capacitance sensing method in the normal driving mode, and that drive the touch panel with a self capacitance sensing method in the low power driving mode.