Alps Electric Co., Ltd.

Toshiyuki Oki

Shinya Yokoyama

Akira Asao

Shuji Yanagi

Takuya Watanabe

In a reset period of a first stage, a switching circuit is turned on, and high-level driving voltages are output from driving circuits. In a charge transfer period subsequent to the reset period, the switching circuit is turned off, and low-level driving voltages are output from the driving circuits. It is determined whether or not an output voltage of an amplifier circuit in the charge transfer period is included in a normal range. In the inspection of a second stage subsequent to the first stage, in the same manner as in the normal measurement, voltages having opposite phases are output from the driving circuits in the reset period and the charge transfer period, and it is determined whether or not the output voltage of the amplifier circuit in the charge transfer period is included in a normal range.

Inspection method of sensor device and sensor device

When a motion in the X-axis direction is detected, first electrodes are set as drive electrodes, and second electrodes are set as detection electrodes. A switching circuit performs switching so as to electrically connect a drive circuit to the first electrodes, electrically connect a first detection circuit to one of the second electrodes, and electrically connect a second detection circuit to the other second electrode. In a motion detection circuit in which connections are established in this manner, the drive circuit drives the drive electrodes, and then the position of an object to be detected in the X-axis direction is obtained from the difference between capacitances detected by the first and second detection circuits at this time.

Capacitive motion detection device and input device using the same

An operational direction detecting device includes a device body that includes an operational area operable in two or more directions, two or more detection electrode/drive electrode pairs that are formed at direction detecting positions of the operational area and form capacitance between a detection electrode and a drive electrode, and a control unit that decides an entrance direction of an object to be detected from capacitance acquired by each of the two or more detection electrode/drive electrode pairs when an object to be detected performing an operation enters the operational area. The control unit decides the direction of the area corresponding to larger capacitance as the entrance direction of the object to be detected when the composite capacitance of capacitances acquired at the two or more detection electrode/drive electrode pairs exceeds a first predetermined value.

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Miyagi-ken, Japan

Toshiyuki Oki