Electronic device for electric-field communication

A technology of electronic equipment and electric field, applied in the direction of electrical components, transmission systems, etc., to achieve the effect of maintaining performance and sufficient performance

Inactive Publication Date: 2011-02-23
ALPS ALPINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When a portable device using human body communication is charged and the portable device is removed from the charger, the above-mentioned problem occurs when a person charged with static electricity picks up the portable device

Method used

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  • Electronic device for electric-field communication
  • Electronic device for electric-field communication
  • Electronic device for electric-field communication

Examples

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Embodiment Construction

[0027] When electronic devices used in electric field communication systems are miniaturized, such as IC cards and various keys, in many cases, the electrodes on the transmission medium side and the outer electrodes are opposed to each other as described above, and the size of the electrodes on the transmission medium side and the outer electrodes cannot be reduced. The capacitance between (signal electrode-reference electrode capacitance Csg), so it is assumed that the electric field signal is lost via this capacitance Csg.

[0028] The inventors of the present invention focused on this point, and found that by introducing an inductance L between the transmission medium side electrode and the outer electrode to perform parallel resonance with the capacitance Csg between the transmission medium side electrode and the outer electrode, it is possible to suppress the inductance L via the capacitance Csg. The loss of the electric field signal, the present invention is dedicated to ...

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PUM

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Abstract

Provided is an electronic device for electric-field communication, which is not easily affected by static electricity and capable of maintaining sufficient performance, even when electrostatically charged. The electronic device for electric-field communication is to be used as at least a transmitter (1) or a receiver (3) in a system which performs electric-field communication through a human body (2). The electronic device has at least human body side electrodes (11, 31) and outer electrodes (12, 32), and an impedance between the human body side electrodes (11, 31) and the outer electrodes (12, 32) is substantially maximum at a frequency (f0) used in the electric-field communication.

Description

technical field [0001] The present invention relates to an electronic device for a system for transmitting and receiving electric field signals via a transmission medium such as a human body or space. Background technique [0002] For a communication system that transmits and receives via a transmission medium (mainly a human body), Patent Document 1 and the like disclose a method of communicating using an electric field. In the system disclosed in Patent Document 1, the transmitter and the receiver each have a pair of electrode pairs, that is, the human body side (internal) electrode that is in close contact with the human body for capacitive coupling, and the human body side (internal) electrode that is coupled to the indoor ground. ) electrode pair consisting of outer (external) electrodes oriented in a large manner. [0003] As mentioned above, according to their respective roles, such as Figure 9 As shown, the electrode pairs 92 are opposed to each other on the surfac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B13/00
CPCH04B13/005
Inventor 蛇口广行中村雅仁佐佐木真井上大地
Owner ALPS ALPINE CO LTD
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