Wacom Co., Ltd.

Wacom Corporation Limited

Wacon Co., Ltd.

Kabushiki Kaisha Wakomu

Yasuo Oda

Yoshihisa Sugiyama

Sadao Yamamoto

Hideyuki Hara

Masaki Yagi

Masamitsu Ito

Nobutaka Ide

Yoshio Nomura

Masamitsu Fukushima

Toshihiko Horie

Masahiko Yamada

Takenori Kaneda

Susumu Yamada

Hidetaka Takiguchi

Naohisa Iwamoto

Tomohiro Kagami

Akio Kikuchi

Andrew Tozer

Ian Scholey

Sado Yamamoto

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 position pointer is provided for indicating a position on a sensor of a position detection device. The position pointer includes an elongate pointer body having a distal end and a proximal end; a first electrode disposed near the distal end; and a second electrode different from the first electrode and disposed near the distal end, wherein both the first and second electrodes are capacitively coupleable with the sensor of the position detection device. The position pointer includes a detection circuit configured to intermittently detect signals transmitted from the position detection device; a signal circuit configured to generate a position signal to be transmitted to the position detection device; and a transmission circuit configured to control transmission of the position signal. The transmission circuit, based on a detection result of the detection circuit, controls transmission of the position signal via the first electrode.

Position pointer

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

A pointer position detection method performed by a sensor controller connected to a sensor pattern includes: detecting a pen signal transmitted via a pen electrode provided at a distal end of an active pen, detecting a position of the active pen based on a level of the pen signal detected; detecting one or more candidate touch positions of a passive pointer that does not transmit a signal by detecting one or more changes of one or more capacitances of the sensor pattern, and outputting, as the position of the passive pointer, the one or more candidate touch positions remaining after excluding the position of the active pen from the one or more candidate touch positions.

Method of outputting pen-up information based on detected position of active pen

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

An active stylus includes at least one electrode, and an integrated circuit coupled to the at least one electrode. The integrated circuit is configured to: operate in a first mode to unilaterally transmit signals to a sensor controller from one of the at least one electrode; determine whether a pen tip of the active stylus is in contact with a sensor panel; responsive to determining that the pen tip is in contact with the sensor panel, transmit a pen pressure value of the pen tip; and responsive to determining that the pen tip is not in contact with the sensor panel, instead of transmitting the pen pressure value, detect an uplink signal transmitted from the sensor panel.

Active stylus

Pointer position detection method

Disclosed is an electronic pen that includes a conductive core body, a power supply circuit, a first signal generation circuit which receives power from the power supply circuit and generates a first signal, and a second signal generation circuit which receives power from the power supply circuit and generates a second signal different from the first signal, and an operation switch which sets an operation mode of the electronic pen to either a first operation mode or a second operation mode. While the operation mode of the electronic pen is set to the first operation mode, the conductive core body transmits the first signal generated by the first signal generation circuit. While the operation mode of the electronic pen is set to the second operation mode, the conductive core body transmits the second signal generated by the second signal generation circuit.

Electronic pen and coordinate input apparatus

Growing community of inventors

Saitama, Japan

Yasuo Oda