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: An active pen and a touch controller are configured to use a frame F including a plurality of temporally separated time slots TS0 to TSm to transmit and receive signals with each other. Each of the active pen and the touch controller can transmit and detect a reference signal for synchronizing a frame position, which is a temporal position of the frame F, and upon detecting the reference signal acquires the frame position based on the reference signal and operates according to the acquired frame position. The active pen is configured to transmit, when changing a master of the synchronization, a reference change signal CH indicating that the active pen itself is the master of the synchronization.

Abstract: A touch controller includes a processor and a memory coupled to the processor. The memory stores instructions that, when executed by the processor, cause the touch controller to: operate in an uplink power saving mode in which an uplink signal is transmitted with reduced power in response to reception of a suspend order from a host computer, and operate in a normal mode in which the uplink signal is transmitted with normal power in response to detection of a predetermined trigger during operation in the uplink power saving mode.

Abstract: Provided is an electronic pen including a tubular housing having an opening at one end, a core body portion including a rod-shaped core body and a pressure member that holds a rear end of the core body and transmits a force applied to the core body, a writing pressure detector that detects a writing pressure applied to the core body, and a tubular holding member that accommodates and holds the core body portion. At least part of a side surface of the core body portion includes a flat surface portion parallel to an axial direction of the pen. An inner edge of the holding member has a cylindrical shape and at least part of the inner edge includes a protruding portion. With the core body portion mounted in the housing, the flat surface portion of the core body portion and the protruding portion of the holding member face each other.

Abstract: Disclosed is an input device including a position detection sensor, an operation including a position indicator which, in operation, indicates a position through interaction with the position detection sensor and accepts a predetermined operation, the operation part being disposed on an input surface that serves as a position detection region of the position detection sensor, an operation detection circuit that, in operation, detects the operation accepted by the operation part, based on the interaction between the position indicator of the operation part and the position detection sensor, and a control signal output circuit that, in operation, outputs a control signal corresponding to the operation detected by the operation detection circuit.

Abstract: A position detecting circuit detects an indicated position on an input surface of a sensor as absolute coordinates. A relative coordinate calculating circuit which, in operation, sequentially obtains the absolute coordinates from the position detecting circuit and calculates relative coordinates indicating the position indicated by an indicator on the input surface, from a difference between previous absolute coordinates and present absolute coordinates. An output absolute coordinate value calculating circuit which, in operation, assumes that an indication input is performed on an input area positioned on an output absolute coordinate region corresponding to a display screen, and calculates an output absolute coordinate value of the indicated position corresponding to the indication input by using the relative coordinates from the relative coordinate calculating circuit. The calculated output absolute coordinate value is output through an output circuit.

Abstract: A sensor control board in a display apparatus includes a display device and a position detector, the display device including a plurality of image elements each having a first end that receives input of a common potential and a second end that receives input of an individual potential, the image elements being arrayed in a grid pattern, the position detector located either above or below the display device, the position detector detecting a pointed position on the display device, the sensor control board outputting a transmission signal to the position detector. The sensor control board includes a clock generation circuit which, in operation, generates a clock signal, and a phase adjustment circuit which, in operation, adjusts a phase of the clock signal such that the phase is inverted at each predetermined timing and output an adjusted clock signal as the transmission signal to the position detector.

Abstract: Input of various kinds of information to an image processing device by use of a foot part of a user is enabled in order not to cause a difference between an image that changes and a feeling with respect to the motion of the body of the user. Position indicators are disposed at a sole back part of a foot-part position indicating instrument. A foot-part position detecting device receives a position indication signal from the position indicators, detects whether the foot-part position indicating instrument makes forward movement that is movement in the extension direction of a line extended in a direction from a heel-side part toward a toe-side part or makes backward movement that is movement in the extension direction of a line extended in a direction from the toe-side part toward the heel-side part, and indicates the forward movement and the backward movement to the image processing device.

Abstract: 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.

Abstract: In a case in which an electronic pen main unit made into a cartridge is held movably in a casing, electrical connections between the electronic pen main unit and electronic circuit components of the casing are reliably established. The electronic pen main unit is fitted to a fitting part disposed in a casing of an electronic pen in which the pen tip side is made to be an opening and is housed in a state of being movable in a hollow part of the casing by a movement mechanism that moves the fitting part in the axial center direction of the casing.

Abstract: An electronic pen cartridge is replaceable with a refill of a stationery ballpoint pen such that the stationery ballpoint pen housing can be reused as the electronic pen housing. The electronic pen cartridge is of a capacitance type and includes a pen tip which is projectable from an opening on one side in an axial direction of the pen housing. Inside the tubular cartridge housing are an electronic circuit including a signal transmission circuit configured to generate a signal to be supplied to a position detection sensor, and a rechargeable power storage device configured to supply a power supply voltage to the electronic circuit. A coil is wound around a portion of the cartridge housing, the portion located at a position where there is room in the pen housing. The power storage device is charged by a current induced in the coil based on an externally supplied magnetic field.

Abstract: Provided is a pen state detection circuit for detecting a state of an electronic pen based on a signal distribution detected by a touch sensor including a plurality of sensor electrodes arranged in a plane shape, the electronic pen including at least one electrode, the pen state detection circuit, in operation, acquires, from the touch sensor, a first signal distribution and a second signal distribution, generates a two-dimensional signal distribution by synthesizing the first signal distribution and second signal distribution, or generates a two-dimensional feature distribution by synthesizing a first feature distribution relating to a shape of the first signal distribution and a second feature distribution relating to a shape of the second signal distribution, and estimate a position indicated by the electronic pen or a posture of the electronic pen from the two-dimensional signal distribution or two-dimensional feature distribution.

Abstract: A sensor system includes first sensor electrode groups and a first integrated circuit, and second sensor electrode groups and a second integrated circuit. The first integrated circuit and the second integrated circuit are controlled such that a first uplink signal, which is transmitted from the first integrated circuit via the first sensor electrode groups, and a second uplink signal, which is transmitted from the second integrated circuit via the second sensor electrode groups, are not transmitted at the same time.

Abstract: Provided is an electronic device including a display panel that, in operation, displays an image or video, a touch sensor of a capacitive type and having a plurality of sensor electrodes, the touch sensor being arranged above the display panel separately with a gap between the touch sensor and the display panel, and an integrated circuit that, in operation, acquires a signal distribution correlated with a capacitance formed between an indicator approaching the touch sensor and the sensor electrodes, and performs signal processing on the signal distribution to detect the indicator, in which the integrated circuit, in operation, varies the signal processing according to a detection result of an overload on the touch sensor.

Abstract: In one embodiment, a stylus comprising an accelerometer operable to detect an acceleration in response to a touch to the body and initiate a pre-determined function, a method of using same, and one or more non-transitory computer-readable storage media embodying logic.