Title:
タッチ検出装置
Document Type and Number:
Japanese Patent JP7436275
Kind Code:
B2
Abstract:
To suppress decrease in detection accuracy of a touch operation.SOLUTION: A controller of a touch detection device updates a base capacity value Cbase that is the basis of a threshold Cth to detect a touch operation from a capacitance value Cap, when a long press operation for a duration Ts or longer is performed on a touch operation part. In the update of the base capacity value Cbase, a capacitance value Cap before decrease is set to an initial value C0 and a capacitance value ΔC is set depending on whether the capacitance value Cap is equal to or greater than a specified capacity value Cref (steps 120-128); and then, a capacitance value Cap after the change of a capacitance value Cap from the initial value C0 has reached the capacitance value ΔC is set to the base capacity value Cbase (steps 132-140). Thus, the base capacity value Cbase with respect to the threshold Cth can be appropriately undated, so that decrease in detection accuracy of a touch operation can be suppressed.SELECTED DRAWING: Figure 4
Inventors:
Shingo Fukuhara
Norihiro Shimizu
Youhei Ito
Norihiro Shimizu
Youhei Ito
Application Number:
JP2020073980A
Publication Date:
February 21, 2024
Filing Date:
April 17, 2020
Export Citation:
Assignee:
Tokai Rika Electric Co., Ltd.
International Classes:
H03K17/95; G06F3/02; H01H36/00
Domestic Patent References:
| JP2015073160A | ||||
| JP2018116631A | ||||
| JP2017111507A |
Foreign References:
| US20110157076 |
Attorney, Agent or Firm:
Patent Attorney Corporation Taiyo International Patent Office
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