Title:
POSITION DETECTION DEVICE AND POSITION DETECTION METHOD
Document Type and Number:
Japanese Patent JP2017220187
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a position detection device placed on an image display device.SOLUTION: A position detection device includes: a resonance circuit; a transmission unit for transmitting an electromagnetic wave; a reception unit for receiving the electromagnetic wave radiated by the resonance circuit; a first ladder-like antenna by providing one-turn loop coils together and forming a ladder-shaped continuous loop coil; a second ladder-like antenna provided by rotating a similar ladder-shaped antenna by 90 degrees; a loop connection switching unit capable of selectively connecting both ends of a loop coil group; a transmission/reception switching unit capable of connecting a connection line from the loop connection switching unit with the transmission unit or the reception unit by switching between them; and a signal processing unit for calculating an instruction position on the basis of characteristic distribution of a received signal. The antennas allow people to visually recognize an opposite side. They are formed on a transparent base material. An opacity conductive material is made into a thin wire and a mesh shape. It is any of copper, aluminum or silver, or alloy including them. The reception unit includes a differential reception circuit and removes a common mode noise.SELECTED DRAWING: Figure 2
Inventors:
FUKUZAKI YASUHIRO
Application Number:
JP2016116719A
Publication Date:
December 14, 2017
Filing Date:
June 10, 2016
Export Citation:
Assignee:
NEW COM TECHNO INC
International Classes:
G06F3/046; G06F3/041
Domestic Patent References:
| JPH04109324A | 1992-04-10 | |||
| JP2007257164A | 2007-10-04 | |||
| JPH0736601A | 1995-02-07 | |||
| JP2000200142A | 2000-07-18 |
Foreign References:
| WO2015083196A1 | 2015-06-11 | |||
| WO2015059732A1 | 2015-04-30 | |||
| WO2016013105A1 | 2016-01-28 | |||
| WO2016056272A1 | 2016-04-14 |
Attorney, Agent or Firm:
Patent business corporation Protech
Ikuo Kobayashi
Ikuo Kobayashi