Title:
METHOD PERFORMED BY ELECTROMAGNETIC INDUCTION-TYPE SENSOR CONTROLLER, SENSOR CONTROLLER, AND POSITION DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/238760
Kind Code:
A1
Abstract:
[Problem] To increase the S/N ratio of a pen signal received in a sensor controller, without decreasing the frequency of position detection and without increasing the circuit size of the sensor controller. [Solution] A method according to the present invention is performed by an electromagnetic induction-type sensor controller. According to the method, three loop coils LCxn-1 to LCxn+1 are connected in a connection configuration with different connection polarities in each of a plurality of pen signal detection periods T1 to T3, a result value indicating the level of the pen signal is detected via the three loop coils LCxn-1 to LCxn+1, and reconstructing computation corresponding to the connection polarities is performed with respect to a plurality of result values detected in each of the plurality of pen signal detection periods, to thereby separate and acquire the level of the pen signal corresponding to each of the three loop coils LCxn-1 to LCxn+1.
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Inventors:
MIZUHASHI HIROSHI (JP)
ITO AKIRA (JP)
SUGIYAMA YOSHIHISA (JP)
LEE JOO-HOON (JP)
ITO AKIRA (JP)
SUGIYAMA YOSHIHISA (JP)
LEE JOO-HOON (JP)
Application Number:
PCT/JP2023/020407
Publication Date:
December 14, 2023
Filing Date:
June 01, 2023
Export Citation:
Assignee:
WACOM CO LTD (JP)
International Classes:
G06F3/046; G06F3/041
Foreign References:
| JP4955116B1 | 2012-06-20 | |||
| JPH05143224A | 1993-06-11 | |||
| US8982091B1 | 2015-03-17 |
Attorney, Agent or Firm:
PATENT ATTORNEY CORPORATION SORAOTO (JP)
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