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Title:
METHOD FOR ADJUSTING RESONANCE FREQUENCY OF RESONANCE CIRCUIT INCLUDED IN ELECTRONIC PEN, ELECTRONIC PEN, AND METHOD FOR PRODUCING ELECTRONIC PEN
Document Type and Number:
WIPO Patent Application WO/2021/117250
Kind Code:
A1
Abstract:
[Problem] To enable suitable adjustment of a reference resonance frequency. [Solution] A method according to the present invention is for adjusting a resonance frequency of a resonance circuit included in an electronic pen, the method comprising, by using an adjustment means for adjusting capacitance of an internal capacitor array and a measurement means for measuring an alternating magnetic field generated by the resonance circuit: (1) a step S2 for changing, among a plurality of capacitive elements that form the internal capacitor array, states of a portion of the capacitive elements determined in advance; and (2) a step S6 for, in accordance with an amount of change of a reference resonance frequency of the resonance circuit caused by said changing, partially or totally changing states of one or more capacitive elements except for said portion of the capacitive elements among the plurality of capacitive elements that form the internal capacitor array.

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Inventors:
YAMASHITA SHIGERU (JP)
HORIE TOSHIHIKO (JP)
ITO MASAMITSU (JP)
Application Number:
PCT/JP2019/049062
Publication Date:
June 17, 2021
Filing Date:
December 13, 2019
Export Citation:
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Assignee:
WACOM CO LTD (JP)
International Classes:
G06F3/03
Foreign References:
JP2019139735A2019-08-22
JP2016035682A2016-03-17
JP2014026553A2014-02-06
JP2013254816A2013-12-19
JP2010283487A2010-12-16
Attorney, Agent or Firm:
KUROSE Yasuyuki (JP)
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