Wacom Co., Ltd.

Hideyuki Komatsu

Jun Kadowaki

Haruhiko Hisano

Shigeyuki Sano

Kazuhiro Miyoshi

A touch sensor includes a sensor electrode group; and a touch integrated circuit coupled to the sensor electrode group for executing touch detection and configured to generate frame data indicative of a detection level of each of two-dimensional positions in the sensor electrode group. The touch integrated circuit is connected to an external processor different from the touch integrated circuit via a first bus. The touch integrated circuit supplies the frame data to the external processor via the first bus. The external processor feeds determination data resulting from performing predetermined processing on the frame data back to the touch integrated circuit. The touch integrated circuit performs an operation based on the determination data.

System including touch IC and external processor, and touch sensor including touch IC

A sensor controller is provided, to be connected to a sensor electrode group configuring a surface. The sensor controller supplies a determined AC signal to one or more AC signal transmission electrodes that form part of a plurality of sensor electrodes included in the sensor electrode group, and the sensor controller transmits, from cancellation signal transmission electrode(s) different from the AC signal transmission electrodes, a cancellation signal configured to prevent a signal transmitted from the AC signal transmission electrodes from appearing in a ground terminal of a detection circuit of the stylus. The sensor controller thusly configured may facilitate preventing a situation in which the stylus cannot detect an uplink signal and facilitate preventing the uplink signal from affecting the operation of another apparatus such as a display apparatus.

Sensor controller

A method performed by a system is provided, wherein the system includes a touch IC executing touch detection and an external processor, which is different from the touch IC and which may include a touch IC support firmware. The system includes a sensor electrode group connected to the touch IC; and a first bus connecting the touch IC with the external processor. The touch IC generates frame data indicative of a detection level of each of two-dimensional positions in the sensor electrode group, and supplies the frame data to the external processor via the first bus. The external processor feeds determination data resulting from performing predetermined processing on the frame data back to the touch IC, and the touch IC performs an operation based on the determination data. Thus, the touch IC can utilize the processing results of the external processor.

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Saitama, Japan

Hideyuki Komatsu