Abstract: A method of palm rejection is executed by a sensor controller that is connected to a plurality of sensor electrodes and that detects a downlink signal transmitted from an active pen. The method includes determining whether or not a phase of the detected downlink signal matches a phase shared in advance between the sensor controller and the active pen, and outputting, when it is determined that the phases match, a position of the active pen derived on the basis of a distribution of levels of the downlink signal in the plurality of sensor electrodes.

Abstract: Provided is an electronic pen including a core body formed of a conductive material, the core body including a pen tip, and a tubular casing that is formed of a conductive material and has the core body disposed in a tip end part of the tubular casing. The tubular casing includes a plurality of tubular casings having a same axis. The tubular casing has a shortened state in which the tubular casings overlap each other. The tubular casing also has a lengthened state in which the tubular casings are extended and overlap each other less than the tubular casings overlap each other when the tubular casing has the shortened state.

Abstract: A pen detection system is provided that detects a pen signal transmitted from a pen to detect a position of the pen. The system includes a sensor pattern in which an electrode group including first and second partial electrode groups is disposed; a first integrated circuit that is connected to the first partial electrode group to acquire a level distribution of the pen signal in the first partial electrode group; and a second integrated circuit that is connected to the second partial electrode group to acquire a level distribution of the pen signal in the second partial electrode group. A predetermined number of boundary electrodes positioned near a boundary of the first partial electrode group and the second partial electrode group among a plurality of electrodes included in the electrode group are connected to both of the first and second integrated circuits, wherein the predetermined number is an even number.

Abstract: A position indicating device includes a housing in which an electronic pen including a pen tip is mountable, a force sense generator configured to generate a force sense, and a processor configured to control the force sense generator to generate the force sense when, with the electronic pen mounted in the housing, a distance between a position of the pen tip of the electronic pen in a virtual reality space and an object in the virtual reality space is equal to or less than a predetermined value.

Abstract: Provided are a pen state detection circuit, a pen state detection system, and a pen state detection method that can improve estimation accuracy for a pen state in an electronic pen including at least one electrode. A pen state detection circuit acquires, from a touch sensor, a first signal distribution indicating a change in capacitance associated with approach of a first electrode and uses a machine learning estimator to estimate an instruction position or an inclination angle of an electronic pen from first feature values related to the first signal distribution. The first feature values include first local feature values related to a first local distribution corresponding to sensor electrodes in a number fewer than the number of arranged sensor electrodes exhibiting the first signal distribution.

Abstract: An active pen is provided, which facilitates avoiding complex computation for phase acquisition on the side of a sensor integrated circuit configured to receive downlink signals from active pens, and allows for generating carrier waves for the downlink signals using a simple configuration, namely, a frequency dividing circuit, while reducing a difference in unused time in one time slot between the active pens. An active pen 2 is configured to transmit one or more symbol values in one time slot, and includes a frequency dividing circuit 43 configured to frequency-divide a reference clock with a frequency division ratio based on each of a plurality of frequencies different from each other, to thereby generate a plurality of carrier waves having frequencies different from each other.

Abstract: A method performed by a device (e.g., touch controller) includes deriving a pen position, and transmitting a report indicating the derived pen position to a host computer. The report includes a first area storing position data indicating the derived position and a second area storing non-position data different from the position data. The method includes securing a buffer area for retaining a plurality of the reports in a memory, deriving the pen position at each determined scanning time, and generating a report including the position data indicating the derived position. The method includes storing the report in the buffer area and, in response to obtaining the non-position data, writing the non-position data in the second area of each of one or more of the reports stored in the buffer area. The method includes transmitting the plurality of the reports stored in the buffer area to the host computer.

Abstract: A position detection apparatus includes a sensor, and a controller that detects a position of a first position indicator and a position of a second position indicator through the sensor. The controller continues detecting the position of the first position indicator and halts detecting the position of the second position indicator after a state in which the positions of the first position indicator and the second position indicator are not detected changes to a state in which the position of the first position indicator is detected, and continues both detecting the position of the second position indicator and detecting the position of the first position indicator after the state in which the positions of the first position indicator and the second position indicator are not detected changes to a state in which the position of the second position indicator is detected.

Abstract: A sensor controller includes a transmitter configured to transmit an uplink signal including a first partial signal and a second partial signal. The transmitter is configured to transmit the first partial signal by direct spreading using a first spread code and transmit the second partial signal by direct spreading using a second spread code which is different from the first spread code and which has an identical chip time length to the first spread code. An active stylus includes a receiver configured to receive an uplink signal including a first partial signal and a second partial signal. The receiver is configured to synchronize with the uplink signal by detecting the first partial signal using a first spread code and thereafter detect the second partial signal using a second spread code, which is different from the first spread code and has an identical chip time length to the first spread code.

Abstract: A digital input device includes a sensor that detects an electronic pen and outputs coordinates according to positions pointed by the electronic pen, a display device, an operation button, a processor, and a storage device storing a program that causes the digital input device to: display, on the display device, a predetermined template according to a format indicated by template data and inputted information according to the position pointed by the electronic pen and received via the sensor; provide timepoint information at each timepoint, generate pieces of time-series data based on the timepoint information provided at each timepoint, each of the pieces of the time-series data including: a timepoint value indicated by the timepoint information, coordinate values indicated by the coordinates output from the sensor, a writing pressure value, and a button status value; and store answer information and correction information in association with the template data indicating the format.

Abstract: A signature verification platform includes: a locale classifying engine configured to decide a style of a signature by applying machine learning-based classification techniques to the signature that is input to the locale classifying engine; a parameter profile generating section configured to select a verification profile which suits the style decided by the locale classifying engine; and a verification engine configured to verify the signature using the verification profile selected by the parameter profile generating section.

Abstract: Disclosed is a pointer position detection method for detecting, using a touch sensor including a plurality of sensor electrodes, a touch position indicated by a passive pointer that does not transmit a signal and a pen position indicated by an active pen configured to transmit a downlink signal from a pen electrode disposed in a distal end of the active pen, the pointer position detection method performed by a sensor controller connected to the touch sensor. The pointer position detection method includes: detecting one or more candidate pen positions based on a level of the downlink signal in each of the plurality of sensor electrodes; determining the pen position in an active region at least partially surrounded by a bezel region of a display device from the one or more candidate pen positions; and detecting a gesture performed by the active pen in the bezel region of the display device.

Abstract: A handwritten data capture method creates handwritten data including a plurality of pieces of stroke data that is based on writing performed on each page of a paper medium having a plurality of pages. The handwritten data capture method includes: acquiring the plurality of pieces of stroke data created based on the writing sequenced in a writing order; displaying the pieces of stroke data together on a display device; accepting an input of a break position of the pieces of stroke data; identifying a continuous portion of the pieces of stroke data based on the break position and the writing order; updating the display device to display the identified continuous portion of the pieces of stroke data in the writing order; and repeating the accepting, the identifying, and the updating until a given operation is received.

Abstract: Provided is an input system including an instruction device; a detection device that detects an instruction position of the instruction device; a display device that is provided separately from the detection device and that displays an image of a space; a position detector that detects, in the space, a line-of-sight position in a line-of-sight of the position detector; a processor; and a memory storing instructions, which when executed by the processor, cause the processor to set, in the space, an instruction target area including a reference position of the instruction device, based on the line-of-sight position detected by the position detector at the time of reception of a predetermined operation by the instruction device, and control the display device to display the instruction position of the instruction device in the instruction target area and on the image of the space.

Abstract: An ink file output method is provided, which includes: generating M (M is an integer of 1 or more) pieces of stroke data SD on the basis of event data generated as M input devices move, respectively; generating N (N is an integer of 1 or more and M or less) kinds of logical names LN (metadata) identifying the M number of input devices; generating a metadata block associating the M pieces of stroke data SD with the N kinds of logical names LN; and writing the M pieces of stroke data SD and the metadata block to an ink file.

Abstract: Provided is an electronic pen core body including a tip component portion coupled to an axis component portion. At least one end of the axis component portion in an axial direction is made of a material that is harder than a material from which the tip component portion is made. The axis component portion includes a recessed hole and a fitting portion directly or indirectly fitted to a pen pressure detector. The tip component portion includes a tip portion protruding from the one end of the axis component portion in the axial direction, a coupling core portion disposed within the recessed hole and coupled to an inner wall surface of the recessed hole of the axis component portion, and a second ring-shaped end surface that contacts a first ring-shaped end surface of the axis component portion. The first ring-shaped end surface is covered by the second ring-shaped end surface.

Abstract: A system includes a sensor controller, and a pen configured to periodically transmit a pen-pressure value of N bits to the sensor controller, in which the sensor controller and the pen perform pairing by bidirectionally communicating with each other. After processing for the pairing is completed, the pen periodically transmits the pen-pressure value, and, during a period before the processing for the pairing is completed, the pen transmits, instead of the pen-pressure value, a shortened pen-pressure value of high-order M bit(s) that are shorter than the N bits for the pen-pressure value.

Abstract: 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.