Wacom Co., Ltd.

Sadao Yamamoto

Yasuo Oda

Hideyuki Hara

Yoshihisa Sugiyama

David Charles Fleck

Masayuki Miyamoto

Haruhiko Hisano

Shunya Saito

Yoshio Nomura

Takeshi Kobori

Yoshifumi Konda

Yuji Katsurahira

Patrick Troy Gray

Jun Kadowaki

Nobutaka Ide

Naoto Onoda

Kazuhiro Miyoshi

Masahiko Yamada

Mu-Tzu Chen

Philipp Daniel Schongen

Peter Bacher

Michael Shawn Gray

Susumu Yamada

Toshihide Chikami

Naohisa Iwamoto

Takashi Namura

A method to be performed by a sensor controller that periodically transmits an uplink signal, and by a stylus that, upon receiving the uplink signal, determines a transmission and reception schedule for a downlink signal and the uplink signal on the basis of the reception timing of the uplink signal. The method includes executing, by the stylus, an uplink signal receiving operation for a first predetermined period of time according to the transmission and reception schedule. The method includes, responsive to the uplink signal not received through the receiving operation and expiration of the first predetermined period of time, continuing, by the stylus, the uplink signal receiving operation for a second predetermined period of time, instead of transmitting the downlink signal according to the transmission and reception schedule.

Method to be performed by stylus and sensor controller, stylus, and sensor controller

An active pen is provided that transmits, through coupling capacitance, a signal to a sensor electrode connected to a sensor controller. The active pen includes a pen tip electrode provided on a leading end in a pen axis direction of the active pen; a peripheral electrode provided behind in the pen axis direction as viewed from the pen tip electrode; and a signal processor that transmits a downlink signal from the pen tip electrode and that transmits a reverse-phase signal of the downlink signal from the peripheral electrode at the same time.

Communication method executed between active pen and sensor controller, and active pen

A single position indicator that can be used with a plurality of different types of position detection systems. The position indicator includes a communication circuit which, in operation, communicates with an outer device, a configuration circuit which, in operation, performs an initial setting process based on a signal from the outer device, a signal generation circuit which, in operation, generates a stylus position signal, and a control circuit. The control circuit, in operation, controls transmission of the stylus position signal based on an initial setting of at least one switch circuit that is set by the initial setting process performed by the configuration circuit, and controls reception of a signal received from the outer device via the communication circuit.

Position indicator

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.

Method carried out in system including active stylus and sensor controller, sensor controller, and active stylus

A stylus includes a first transmission circuit, a second transmission circuit, and a control circuit which controls the first and second transmission circuits according to a first transmission mode in which the control circuit controls the first transmission circuit to transmit a first downlink signal from a tip electrode and controls the second transmission circuit to not transmit a second downlink signal from a tail electrode, a second transmission mode in which the control circuit controls the first transmission circuit to not transmit the first downlink signal from the tip electrode and controls the second transmission circuit to transmit the second downlink signal from the tail electrode, and a third transmission mode in which the control circuit controls the first transmission circuit to transmit the first downlink signal from the tip electrode and controls the second transmission circuit to transmit the second downlink signal from the tail electrode.

Stylus and sensor control circuit

A sensor controller is provided for use in a position detector for detecting a position of a position indicator on a touch surface. The sensor controller includes a microprocessor for outputting a value of a symbol to be sent to the position indicator. The sensor controller includes a transmitter coupled to the microprocessor for generating a transmission signal including a chip string CNproduced by cyclically shifting a code string PNa having autocorrelation characteristics by a shift quantity based on the value of the symbol to be sent, and sending the generated transmission signal to the position indicator via the touch surface. A higher bit rate can be obtained for a given chip rate compared with the prior art in which only 1 bit can be expressed by one code string.

Sensor controller, position indicator, and position detecting system

An integrated circuit for a pen includes reception circuitry configured to receive an uplink signal generated according to a first protocol and transmission circuitry configured to transmit, according to the first protocol, a downlink signal based on a reception timing of the uplink signal and a command included in the uplink signal. In a case where the reception circuitry receives the uplink signal that is in a normal state (uplink signal NUS) in a first period, the transmission circuitry transmits the downlink signal including data according to the command included in the uplink signal NUS. In a case where the reception circuitry receives the uplink signal that is in a special state (uplink signal SUS) in a second period subsequent to the first period, the transmission circuitry transmits the downlink signal including data according to the command included in the uplink signal NUS received in the first period.

Pen and sensor controller

An auxiliary device according to the present disclosure includes a ruler part, a plurality of electrodes provided at the ruler part, a receiving electrode for receiving an uplink signal transmitted from a sensor controller, and a processor that transmits a downlink signal to the sensor controller while sequentially switching the plurality of electrodes in response to reception of the uplink signal.

Sensor controller

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.

Sensor system

Apparatus and method are provided that are capable of controlling a display in response to reliable detection of a sliding movement operation of a pointer (e.g., a user's finger) that passes through an end of a display region. The apparatus and method utilize a position detection sensor, which is superposed on the display and configured to detect the pointer's position discretely and successively at a predetermined time interval. Based on a first position detected by the position detection sensor and a second position detected, at the predetermined time interval since the detection of the first position, by the position detection sensor, which together indicate a moving operation of the pointer, it is determined whether the moving operation of the pointer has crossed an end of the display region. If it is so determined, a passed end position of the display region is calculated based on the first and second positions.

Integrated circuit, sensor and electronic device for controlling display screen

A pen-shaped position indicator is configured to capacitively couple with a sensor surface of a position detection apparatus. The indicator includes a pen-shaped body; a coil; a driving power production circuit configured to produce a DC voltage from an induced signal in the coil by a wireless interaction with a charging device; a signal production circuit connected to the driving power production circuit and configured to generate a signal based on the DC voltage to form a capacitive relationship between the pen-shaped body and the position detection apparatus; a first electrode; and a second electrode. The first and second electrodes are configured to form first and second capacitive relationships with the sensor surface, respectively, to generate detection signals in the sensor surface from which a first detection signal and a second detection signal distinguishable from each other are extracted and used to obtain angle information of the pen-shaped position indicator.

Pointer, position detection apparatus and position detection method

A position indicator that electrostatically interacts with a sensor includes: a casing having a pen shape; a conductive core body including a pen tip that protrudes from an opening on one end in the axial direction of the casing; a conductor surrounding the core body; a signal transmitting circuit which, in operation, generates a signal that electrostatically interacts with the sensor, and supplies the generated signal to the core body; and a control circuit which, in operation, produces different electrostatic interactions with the sensor by performing a first control operation that sets the conductor in a state of being grounded while the signal is sent out from the pen tip of the core body to the sensor, and performing a second control operation that sets the conductor in a state different from the state of being grounded.

Position indicator including control circuit that causes electrode to switch from being connected to alternating potential to being connected to fixed potential in response to determining that pen pressure is detected

A position indicator includes a pen-shaped body; control circuitry housed in the pen-shaped body and configured to generate position detection signals and generate additional information about the position indicator; a first receiver; a second receiver different from the first receiver; a first transmitter provided near a distal end of the pen-shaped body and configured to transmit the position detection signals to a sensor of a position detection system; and a second transmitter, which is different from the first transmitter and configured to transmit wireless signals to the position detection system. The control circuitry, in response to a control signal from the position detection system received by the first receiver or the second receiver, controls transmission of the position detection signals and transmission of the additional information via a transmitter selected from the first transmitter and the second transmitter, to the position detection system.

A controller of an in-cell type liquid crystal display device is provided. The controller controls first and second electrodes that intersect each other, supplies a pixel driving voltage to the first electrodes during a pixel driving period, and detects a stylus position using the first and second electrodes during a stylus detection period different from the pixel driving period. The controller transmits, using the second electrodes, a command requesting a transmission of a downlink signal to the stylus. The controller detects, using the first and second electrodes, the downlink signal transmitted from the stylus in response to the command, and detects the stylus position based on the detected downlink signal.

Stylus and controller

A home user interface (UI) system for managing digital ink is provided. The home UI system includes a plurality of state sensors capable of detecting a state in a house or a change in the state, and a plurality of home-use devices that are provided in the house or that form part of the house and that each include a handwriting sensor capable of detecting handwriting made by a person. The home UI system further includes one or more notification units that are configured to notify the person of the existence of the home-use device or a detectable region of the handwriting sensor of the home-use device. The home UI system further includes a controller which, when it is determined that a notification is necessary from a detection result of one or more of the state sensors, instructs at least one of the notification units to carry out the notification.

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Tokyo, Japan

Sadao Yamamoto