A touch input system includes a touch panel, configured to transmit an uplink signal; and an active stylus, configured to analyze the uplink signal, synchronize timing and bi-directionally communicate with the touch panel according to the uplink signal; wherein the uplink signal includes a preamble, for synchronizing the timing; a digital data, for bi-directionally communicating between the active stylus and the touch panel; and a cyclic redundancy check, for executing an error check and an error correction for data.

An example electronic device according to various embodiments may include a display, a wireless communication circuit and at least one processor operatively coupled with the display and the wireless communication circuit, and the at least one processor may be configured to receive motion sensor values from an external electronic device through the wireless communication circuit, count the number of approach indicators received together with the motion sensor values, and discard the received motion sensor values when the number exceeds a threshold value.

A device, and a method and a system for editing command sets applied to the device are provided. The system includes an editor installed in a computer device for initiating an editing interface used to edit one or more command sets applied to the device and a writer used to convert the command sets into profiles with a format specified to the device. The command sets are used to form the profiles configured to be written to the device via the writer. The command sets including a set of scripts of commands and input codes specified to the device can be edited through the editor. The device is a computer mouse with multiple keys. The keys can be used to switch the profiles stored in the device, and the command set of the profile being activated is applied to the device for operating the device.

An apparatus and method for a voltage driver circuit where a path between a ground node and an output node includes an inductor and/or another storage element and an energy transfer circuit composed of at least two switching elements (e.g., transistors) and at least two valve elements (e.g. diodes). The energy transfer circuit operates to discharge a capacitive load (e.g. output capacitor) into the storage element and facilitate transition from low to high voltage while increasing efficiency. An additional path to ground may be included via another switching element to prevent crosstalk and hold the output at ground potential.

An electronic device is provided. The electronic device includes a display, a communicator wirelessly connected to a stylus pen, a processor, and a memory storing instructions that cause the processor to acquire motion information of the stylus pen, in response to the motion information matching with a plurality of motion commands, output a plurality of command images corresponding to the plurality of motion commands, respectively, based on a user feedback command to select one of the plurality of command images, determine the motion information as a motion command corresponding to the selected command image, output a tutorial image, acquire motion information of the stylus pen corresponding to the tutorial image, and determine the motion information of the stylus pen as a motion command corresponding to the tutorial image.

An electronic pen includes a signal generator, a power supply, and a resonance circuit. The signal generator is configured to generate a signal. The power supply is configured to supply power to the signal generator. The resonance circuit is configured to generate a current based on the signal and emit a magnetic field based on the current.

A portable read-write pen and a control method for a portable read-write pen. The control method for a portable read-write pen includes the following steps: step S1 of detecting a state of a pen point of the portable read-write pen; and step S2 of controlling, according to the state of the pen point of the portable read-write pen, the portable read-write pen to enable a touch-read mode or a write-record mode.

A method in which a sensor controller is connected to a sensor having an electrode group provided together with a display panel configured to operate in during a variable refresh cycle among a plurality of refresh cycles, and an active stylus performs bidirectional communication with the sensor controller. According to the method, the sensor controller acquires a present refresh cycle among the plurality of refresh cycles of the display panel, generates an uplink signal, which serves as a reference for synchronization corresponding to the acquired present refresh cycle, and transmits the uplink signal to the active stylus, which is not detected as yet or is detected already, at the present refresh cycle.

Regarding a tactile presentation panel, a tactile presentation panel that has a tactile presentation knob having a conductive member placed on an operation surface and presents a tactile sense to a user via the tactile presentation knob includes a movement amount calculation circuit that calculates a movement amount of the tactile presentation knob from current coordinates on the tactile presentation panel of the tactile presentation knob and past coordinates of the tactile presentation knob, a tactile strength calculation circuit that calculates a tactile strength to be applied to the user based on the movement amount, and a tactile presentation circuit that sets a voltage signal waveform based on the tactile strength. The movement amount is at least one of a rotation angle and a rotation speed of the tactile presentation knob.

An e-pen includes e-pen sensor electrodes (including a first and a second e-pen sensor electrode) and drive-sense circuits (DSCs) (including a first DSC and a second DSC. The first DSC drives a first e-pen signal having a first frequency via a first single line coupling to the first e-pen sensor electrode and simultaneously senses, via the first single line, the first e-pen signal. Based on e-pen/touch sensor device interaction, the first e-pen signal is coupled into at least one touch sensor electrode of the touch sensor device. The first DSC process the first e-pen signal to generate a first digital signal representative of a first electrical characteristic of the first e-pen sensor electrode. Similarly, the second DSC drives a second e-pen signal having a second frequency via a second single line coupling to the second e-pen sensor electrode and simultaneously senses, via the second single line, the second e-pen signal.