Title:
TOUCH DETECTION DEVICE
Document Type and Number:
Japanese Patent JP2023055158
Kind Code:
A
Abstract:
To suppress degradation of detection precision generated by a difference in a power supply frequency of a power transmission line.SOLUTION: In a control section 36 of a touch detection device 26, 50 Hz or 60 Hz is set to a measurement frequency Fa and on the basis of a period Ta of the measurement frequency Fa, a measurement cycle tc and an averaging period tav for calculating a sectional average value are set. In the control section 36, an averaging interval ti of two averaging sections is set to an interval capable of suppressing one sectional average value by the other sectional average value in the frequency component of 50 Hz and 60 Hz and the average measurement value as a detection value is calculated from the two sectional average values obtained at the averaging interval ti. Thus, the touch detection device 26 can suppress a noise component of a power supply frequency of the same 50 Hz as the measurement frequency Fa and can suppress a noise component of a power supply frequency of different 60 Hz from the measurement frequency Fa, thereby achieving highly precise touch detection.SELECTED DRAWING: Figure 3
Inventors:
SUGIMOTO RYOHEI
HANDA YOSHINORI
KAWAI HIROO
HANDA YOSHINORI
KAWAI HIROO
Application Number:
JP2021164322A
Publication Date:
April 17, 2023
Filing Date:
October 05, 2021
Export Citation:
Assignee:
TOKAI RIKA CO LTD
International Classes:
B62D1/06; G01B7/00
Attorney, Agent or Firm:
Patent Attorney Corporation Taiyo International Patent Office