JP2003134681A - Terminal apparatus and power feeding apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that a phenomenon such as a reduction in the communication success rate or the like are likely to happen because a communication semiconductor is influenced by a magnetic field, when performing optical communication between a terminal apparatus and a power feeding apparatus during charging. SOLUTION: The power feeding apparatus comprises a charging oscillation means for inducing current by resonating a charging resonance means of an external terminal apparatus through electromagnetic induction, a power feeding means for feeding power to the charging oscillating means, an oscillation control means for controlling the oscillation of the charging oscillation means, and a communication means for communicating with the terminal apparatus. The oscillation control means controls the strength of the magnetic field which oscillates based on the communication condition of the communication means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal device and a power feeding device, and more particularly to a terminal device and a power feeding device using a non-contact charging method using electromagnetic induction.

[0002]

2. Description of the Related Art In recent years, not only mobile terminals, but also cordless phones, electric toothbrushes, and other products that use batteries as power sources have improved the waterproofness and prevent short circuits at charging terminals. This charging method is becoming popular.

[0003]

When an attempt is made to perform optical communication between a terminal device and a power feeding device during charging, a semiconductor for communication or the like is affected by a magnetic field and a phenomenon such as a decrease in communication success rate occurs. It is easy to happen.

In view of the above problems, it is an object of the present invention to provide a portable terminal device that suppresses the influence of a magnetic field and performs a charging operation and an operation such as communication at the same time.

[0005]

In order to solve the above-mentioned problems, a power feeding apparatus of the present invention comprises a charging oscillating means for resonating a charging resonance means of an external terminal device by electromagnetic induction to induce a current, and Power supply means for supplying electric power to the charging oscillation means, oscillation control means for controlling oscillation of the charging oscillation means, and communication means for communicating with a terminal device, the oscillation control means communicating with the communication means. It controls the strength of the oscillating magnetic field depending on the state.

In the terminal device of the present invention, the charging resonance means that resonates by electromagnetic induction by the charging oscillation means of the power feeding device to induce a current, the communication means that communicates with the power feeding device, and at least the communication means. A battery that supplies power,
Resonance detecting means for detecting that the charging resonance means is operating in resonance, and power supply means for enabling power supply to the battery in response to the resonance detection means detecting resonance operation, It is mounted on the power feeding device and communicates with the power feeding device when power is supplied from the battery to the communication means.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION (Embodiment 1) Next, a first embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a block diagram showing the configurations of a terminal device and a power feeding device according to the first embodiment of the present invention.

FIG. 1 is a block diagram of an oscillation control means of the power feeding device. When the terminal device 1 is placed on the power supply device 2, the data processing means 19 of the terminal device 1 and the communication means 20 such as optical communication, and the data processing means 21 and the communication means 22 of the power supply device 2 are used to make the terminal device 1 and the power supply device 2. Communication is performed between them, power is supplied to the charging oscillation means 3 by the low voltage supply means 23, and oscillation starts. At this time, the magnetic field generated by oscillating at a low voltage is a magnetic field that does not affect communication. The charging resonance means 4 of the terminal device 1 induces a current by electromagnetic induction. The induced current is controlled by the charge control means 16 to charge the battery 17.

When the communication of the necessary data between the terminal device 1 and the power supply device 2 is completed, the power supply device 2 switches the power supply from the high voltage supply means 23 to the charging oscillation means 3. Since the magnetic field generated at this time is stronger than when the voltage is low, the current that can be obtained by the terminal device 1 is also large, and charging can be performed more rapidly than during communication.

Since the strength of the magnetic field during charging is controlled in this way, the charging operation and the communication operation can be performed at the same time by controlling the strength of the magnetic field during communication or the like to suppress the influence. After that, quick charging can be performed.

In this embodiment, communication between the terminal device 1 and the power feeding device 2 is taken as an example, but the terminal device 1 is provided with a wireless communication means, for example, and wireless charging means other than the power feeding device 2 is being charged. Even when wireless communication is performed with a device provided with, the influence of the magnetic field on the wireless can be suppressed by changing the magnetic field strength in the same manner as described above, and the charging operation and the wireless communication can be performed at the same time.

Since the temperature rise also changes by changing the strength of the magnetic field, for example, charging with a high voltage in winter and charging with a low voltage in the summer when the temperature rises severely. -The strength of the magnetic field during charging can be changed depending on the location. (Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIG.

FIG. 3 is a block diagram showing the configurations of the terminal device and the power feeding device according to the second embodiment of the present invention.

The operation up to the start of oscillation is the same as that of the first embodiment, so the explanation is omitted. Turn on / off the power supply from the battery 17 to the data processing means 19 and the communication means 20.
When the terminal device 1 with the power ON / OFF means 25 to be turned off is placed in the power feeding device 2, the power feeding device 2 starts to oscillate. When the charging resonance means 4 of the terminal device 1 resonates, a current is supplied to the charging control means 16 and, at the same time, the resonance detection means 26 detects that resonance has started. The resonance detecting means 26 turns on / off the power supply from the battery 17 to the data processing means 19 and the communication means 20.
The power ON / OFF means 25 is turned on, the data processing means 19, the communication means 20, etc. start to operate, and the communication between the terminal device 1 and the power feeding device 2 is started.

A more specific example will be described. Terminal device 1
When communicating the data stored therein to another computer or the like through the power supply device 2, the worker puts the terminal device 1 on the power supply device 2 without worrying about the power ON / OFF state. The terminal device 1 placed on the power feeding device 2 is automatically turned on by the above operation, and starts transmitting data to the computer through the power feeding device 2. When the data transmission is completed, the terminal device 1 automatically turns off the power. During this time, the power is supplied from the power feeding device by electromagnetic induction.

As described above, it is possible to detect that the terminal device 1 is placed on the power supply device 2 while the power is off, and a physical switch or the like is not required for detection, and the terminal device 1 It is possible to improve waterproofness and design flexibility.

[0018]

According to the present invention, since the strength of the magnetic field is controlled by the oscillation control means, charging and communication can be performed simultaneously by controlling the strength of the magnetic field and suppressing the influence during communication.

[Brief description of drawings]

FIG. 1 is a block diagram showing configurations of a terminal device and a power supply device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of an oscillation control unit of the power feeding device.

FIG. 3 is a block diagram showing configurations of a terminal device and a power supply device according to a second embodiment of the present invention.

[Explanation of symbols]

1 terminal device 2 power supply equipment 3 Charge oscillation means (oscillation coil) 4 Resonance means for charging (resonance coil) 15 Power supply means 16 Charge control means 17 batteries 18 Oscillation control means 19 Data processing means of terminal device 20 Communication means of terminal device 21 Data processing means of power supply device 22 Communication means of power supply device 23 Low voltage supply means 24 High voltage supply means 25 Power ON / OFF means 26 Resonance detecting means

Continued front page    (72) Inventor Nobuhiko Fujii             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Satoshi Yoshihara             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F-term (reference) 5G003 BA01 GB08

Claims (4)

[Claims] 1. A charging oscillating means for inducing a current by resonating the charging resonance means of an external terminal device by electromagnetic induction,
Power supply means for supplying electric power to the charging oscillation means,
Oscillation control means for controlling the oscillation of the charging oscillation means,
A power supply device comprising: a communication unit that communicates with a terminal device, wherein the oscillation control unit controls the strength of a magnetic field that oscillates according to the communication state of the communication unit. 2. Resonating means for charging, which resonates by electromagnetic induction by charging and oscillating means of the power feeding device to induce a current, communication means for communicating with the power feeding device, and a battery for supplying power to at least the communication means. Resonance detecting means for detecting that the charging resonance means is operating in resonance, and power supply means for enabling power supply to the battery in response to the resonance detection means detecting resonance operation, A terminal device mounted on the power supply device and capable of communicating with the power supply device when power is supplied from the battery to the communication means. 3. A terminal device, an external device that communicates with the terminal device, a charging oscillating device that resonates the charging resonant device of the terminal device by electromagnetic induction to induce a current, and the charging oscillating device. A communication system comprising: a power supply unit that supplies power to the power supply unit; and a power supply device that includes an oscillation control unit that controls oscillation of the charging oscillation unit according to a communication state between the terminal device and the external device. 4. An external device, a power feeding device that communicates with the external device, a charging resonance unit that resonates with electromagnetic induction by a charging oscillation unit of the power feeding device to induce a current, and communicates with the power feeding device. In response to communication means, a battery for supplying power to at least the communication means, resonance detecting means for detecting that the resonance means for charging is in resonance operation, and detection of resonance operation by the resonance detecting means. A portable terminal that is provided on the power supply device and is capable of communicating with the power supply device when power is supplied from the battery to the communication means. Communication system.