Title:
TOUCH DETECTION DEVICE AND VEHICLE NAVIGATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/054209
Kind Code:
A1
Abstract:
A touch detection device (11) is provided with an electrostatic capacity detection unit (12) that detects the electrostatic capacity of touch sensors (16a-16j), and a touch determination device (15) that determines whether a touch sensor was touched. The touch determination device finds the amount of change in the electrostatic capacity, obtains a maximum electrostatic capacity for a maximum amount of change, and determines whether the difference between the maximum electrostatic capacity and a reference value exceeds a first determination value. In a case where the difference exceeds the first determination value, the touch determination device obtains a minimum electrostatic capacity for a minimum amount of change and also obtains an intermediate electrostatic capacity for an amount of change that is the (n+1) largest. In a case where a first condition, wherein the difference between the maximum electrostatic capacity and the intermediate electrostatic capacity exceeds a second determination value, and a second condition, wherein the difference between the intermediate electrostatic capacity and the minimum electrostatic capacity is less than a third determination value, are both satisfied, the touch sensor with the maximum amount of change is determined to have been touched. In a case where the first condition and/or the second condition is not satisfied, the change in electrostatic capacity is determined to be due to noise.
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Inventors:
TANAKA HIDETAKA (JP)
Application Number:
PCT/JP2013/004738
Publication Date:
April 10, 2014
Filing Date:
August 06, 2013
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
G06F3/044; G06F3/041
Foreign References:
| JP2007208682A | 2007-08-16 | |||
| JPH06162888A | 1994-06-10 | |||
| JP2006222022A | 2006-08-24 |
Attorney, Agent or Firm:
KIN, Junhi (JP)
Gold Junki (JP)
Gold Junki (JP)
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