Kabushiki Kaisha Tokai Rika Denki Seisakusho

Yoshifumi Yasue

Hiroshi Nakano

Yasuhiro Fujioka

Masaya Maeda

A touch sensor device includes an electrode, which is located at an inner side of a touch panel, and a control unit. The control unit detects a change in a capacitance generated at the electrode when a finger approaches the electrode to determine whether or not the touch panel has been touched from the change in the capacitance. The control unit detects a maximum capacitance generated at the electrode during detection of a touched state and set a first OFF determination threshold value, which is used to detect a non-touched state, to a value that is lower than the maximum capacitance by a predetermined value which is set in advance.

Touch sensor device and controller

An input device includes a selection circuit to which a plurality of electrodes disposed in a capacitive touch panel are connected, a line connected to the selection circuit and having a same internal resistance as that between the plurality of electrodes and the selection circuit, an A/D conversion part connected to the selection circuit so as to measure a voltage of the electrodes or a measurement value when the line is connected thereto, wherein the electrodes and the line are each connected selectively to the A/D conversion part by the selection circuit, and a control part configured to control the selection circuit so as to allow the A/D conversion part to measure a voltage of one of the electrodes and the measurement value, and to calculate an electrostatic capacitance of one of the electrodes based on the voltage of one of the electrodes and the measurement value.

Capacitive touch panel input device that measures internal resistances for compensation

A power supply route for a light source includes a first route that closes when a microcomputer is operated and a second route that opens when the microcomputer is operated. When the microcomputer stops operating, the power supply route of the light source is automatically switched from the first route to the second route. When the microcomputer is operated and a position lamp switch is turned on, current is supplied to the light source through the first route. When the microcomputer stops operating and the position lamp switch is turned on, current is supplied to the light source through the second route.

Growing community of inventors

Aichi, Japan

Yoshifumi Yasue