Title:
INPUT DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/042806
Kind Code:
A1
Abstract:
Provided is an input device comprising: a switch unit having a plurality of sensor electrodes to which a drive signal is applied and a cancel electrode for reducing the parasitic capacity between a reference electric potential and each of the sensor electrodes; a detection unit detecting an operation being performed on the switch unit on the basis of the electrostatic capacity change in each of the sensor electrodes; a control unit performing control whereby a drive signal is applied to each of the sensor electrodes and cancel control whereby a signal having an identical waveform to the drive signal is applied to the cancel electrode. The control unit causes a drive signal to be applied to each of the sensor electrodes sequentially, and when the drive signal is being applied to any of the sensor electrodes, performs the cancel control on the cancel electrode, causing a reduction in the parasitic capacity between the reference electric potential and all the sensor electrodes.
Inventors:
SUGIMOTO RYOHEI (JP)
KAWAI HIROO (JP)
KAWAI HIROO (JP)
Application Number:
PCT/JP2017/021162
Publication Date:
March 08, 2018
Filing Date:
June 07, 2017
Export Citation:
Assignee:
TOKAI RIKA CO LTD (JP)
International Classes:
H01H36/00; H03K17/955
Foreign References:
| JP2016051587A | 2016-04-11 | |||
| JP2014163885A | 2014-09-08 | |||
| JP2015184182A | 2015-10-22 | |||
| JP2013190404A | 2013-09-26 |
Attorney, Agent or Firm:
KAMEYA, Yoshiaki et al. (JP)
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