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JP2006005426

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DESCRIPTION JP2006005426
The present invention provides a wireless speaker system that does not limit the operation time
of the speaker device and does not limit the installation location. The transmitting device 10 is
provided with a power transmission unit 15, and the speaker device 20 receives power. The
provision of the unit 25 wirelessly transmits and receives the electric power converted to the
ultra high frequency (microwave) 2 and supplies the electric power received by the power
receiving unit 25 as a power supply of the speaker device 20, whereby the speaker device 20 is
wired. The installation site can be freely set without connection and mechanical connection, and
can be operated continuously without limiting the operation time. [Selected figure] Figure 1
ワイヤレススピーカシステム
[0001]
The present invention relates to wireless speaker systems. In particular, it relates to a wireless
surround speaker system.
[0002]
A conventional wireless speaker system converts an audio signal into a radio signal of infrared or
radio frequency, and transmits the radio signal to a speaker device by a transmitter. The speaker
device receives the transmitted wireless signal by the receiving unit, internally processes and
amplifies the received signal, and outputs an audio output based on the audio signal by the
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1
speaker. The internal circuit of this speaker device is powered by a built-in charger or battery. In
addition, the power cord or power adapter may be connected from the outside. Furthermore,
there is also a power supply truck which is used to supply power from a fixing device of a
speaker device (see, for example, Patent Document 1).
[0003]
FIG. 4 shows a conventional wireless speaker system described in Patent Document 1 mentioned
above.
[0004]
In FIG. 4, the audio input signal 3 is wirelessly transmitted from the audio signal transmitter 12
as an infrared or radio frequency signal 1 by the transmitter 10 via the input signal processor
11.
The internal circuit of the transmitter 10 supplies power from the power supply unit 14. The
infrared or radio frequency signal 1 wirelessly transmitted from the audio signal transmission
unit 12 of the transmission device 10 is received by the audio signal reception unit 22 of the
speaker device 20. The received radio signal is output from the speaker 28 as an audio output
based on the audio input signal 3 via the received signal processing unit 23 and the amplification
output unit 27. The power of the internal circuit of the speaker device 20 is supplied from the
power supply unit 24 from the power distribution track 40 via the connector 30. A power supply
line is connected to the distribution truck 40 and is usually installed on a ceiling, a wall or the
like. Unexamined-Japanese-Patent No. 7-38982
[0005]
However, since the conventional configuration requires a distribution truck, the speaker device
can be installed and moved only within the range of the installed distribution truck, which has a
problem that the installation location is limited.
[0006]
Moreover, when using a charger or a battery for the power supply of a speaker apparatus, the
operation time of a speaker apparatus will be limited by the residual amount of a charger or a
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2
battery.
Furthermore, it had the subject that the effort to charge and the effort to replace a battery were
taken.
[0007]
The present invention solves the above-mentioned conventional problems, and does not limit the
operation time of the speaker device, and does not require time and effort for charging and
battery replacement, and does not limit the installation location of the speaker device. Intended
to be provided.
[0008]
In order to solve the above-mentioned conventional problems, a wireless speaker system
according to the present invention includes a transmitting device including an audio signal
transmitting unit and a power transmitting unit, and a speaker device including an audio signal
receiving unit and a power receiving unit. The power wirelessly transmitted from the power
transmission unit of the transmission device of the speaker device is received by the power
reception portion of the speaker device, and is used as the power supply of the internal circuit of
the speaker device. The audio signal is wirelessly transmitted from the audio signal transmission
unit of the transmission device The audio signal wirelessly transmitted is received by the audio
signal receiving unit of the speaker device, the received audio signal is internally processed and
amplified, and an audio output based on the audio signal is output from the speaker.
[0009]
According to this configuration, the speaker device can be operated continuously without wired
connection and mechanical connection.
[0010]
According to the wireless speaker system of the present invention, the installation place of the
speaker device can be freely set, and can be continuously operated without limiting the operation
time of the speaker device.
[0011]
Hereinafter, the best mode for carrying out the present invention will be described with
reference to the drawings.
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3
[0012]
Embodiment 1 FIG. 1 is a block diagram showing a configuration of a wireless speaker system
according to Embodiment 1 of the present invention.
In FIG. 1, the same components as those in FIG.
[0013]
In FIG. 1, the transmission device 10 has a power transmission unit 15, and the power
transmission unit 15 converts the power supplied from the power supply unit 14 into an ultra
high frequency (microwave) 2 and outputs it.
The output ultrahigh frequency (microwave) 2 is received by the power receiving unit 25 of the
speaker device 20 and reconverted into electric power.
The power received by the power receiving unit 25 and reconverted is supplied from the power
supply unit 24 as a power supply for the internal circuit of the speaker device 20.
[0014]
According to such a configuration, by providing the power transmission unit 15 in the
transmission device 10 and providing the power reception unit 25 in the speaker device 20, it
becomes possible to perform wireless power transmission and reception of power, and the
speaker device 20 can be wired and connected. It is possible to freely set the installation place
without making a purpose connection, and to operate the speaker device 20 continuously
without being limited in operating time.
[0015]
In the present embodiment, the ultrahigh frequency (microwave) 2 is used as a wireless power
transmission and reception method of power, but focused light and a photoelectric conversion
element may be used.
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4
[0016]
Second Embodiment FIG. 2 is a block diagram showing a configuration of a wireless speaker
system according to a second embodiment of the present invention.
In FIG. 2, the same components as in FIG. 1 and FIG. 4 will be assigned the same reference
numerals and descriptions thereof will be omitted.
[0017]
In FIG. 2, the speaker device 20 incorporates a secondary battery unit 26 for temporarily storing
the power received by the power receiving unit 25, and power is supplied by the power stored in
the secondary battery unit 26. It is supplied as a power source of the internal circuit of the
speaker device 20 via the unit 24.
[0018]
According to this configuration, by providing the secondary battery unit 26 to temporarily store
the power received by the power reception unit 25 of the speaker device 20, the power
transmission / reception transmission path can be temporarily stored on a third party or an
object. Even in the case of being interrupted, the power supply of the speaker device 20 can be
continued by using the power stored in the secondary battery unit 26.
[0019]
Third Embodiment FIG. 3 is a block diagram showing a configuration of a wireless speaker
system according to a third embodiment of the present invention.
In FIG. 3, the same components as in FIG. 1, FIG. 2 and FIG. 4 will be assigned the same reference
numerals and descriptions thereof will be omitted.
[0020]
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5
In FIG. 3, the power receiving position transmitting means 251 is added to the speaker device 20.
To the transmission device 10, a power receiving unit detection unit 151 and a power
transmission unit control unit 152 are added.
[0021]
The transmitting device 10 widens the directivity of the microwaves (microwaves) 2 at the start
of power transmission, and transmits power with a relatively small amount of power to be
transmitted.
[0022]
The speaker device 20 receives a small amount of power transmitted from the power
transmission device 10 by the power reception unit 25, and the power reception position
information of the power reception unit of the speaker device 20 is received by the power
reception position transmission unit 25 as an infrared or radio frequency signal. 4 to the power
reception unit detection unit 151 of the transmission apparatus 10.
[0023]
The power reception position information transmitted from the power reception position
transmission unit 251 of the speaker device 20 is detected by the power reception unit detection
unit 151 to recognize the power reception position of the speaker device 20 and transmitted to
the power transmission unit control unit 152.
The power transmission unit control unit 152 controls the power transmission unit 15 to
transmit power toward the power reception position of the speaker device 20 transmitted from
the power reception unit detection unit.
[0024]
By the power transmission control means 152, the power transmission unit 15 narrows the
directivity of the microwave (microwave) 2 and increases the power to be transmitted for power
transmission.
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6
[0025]
According to this configuration, the speaker device 20 is provided with the power receiving
position transmitting means 251, the transmitting device 10 is provided with the power receiving
unit detecting means 151 and the power transmission direction control means 152, and further,
at the time of power transmission start The receiving power position of the speaker device 20 is
recognized by reducing the transmission power widely, and then the power transmission
direction control means 152 directs the power receiving position of the speaker device 20 to a
microwave (microwave). By controlling to narrow the directivity of 2 and increase the power to
be transmitted, the user of the transmitting device 10 does not reset the transmitting direction of
the transmitting device 10 and the power receiving position of the speaker device 20. The
location of the device 20 can be known and automatically reconfigured to provide optimal
wireless power transfer.
[0026]
The wireless speaker system according to the present invention is useful as a wireless speaker
system or the like which is mainly used as a surround speaker, since the installation place of the
speaker device can be freely made and it is possible to operate continuously.
[0027]
Block diagram showing the configuration of the wireless speaker system in the first embodiment
of the present invention Block diagram showing the configuration of the wireless speaker system
in the second embodiment of the present invention Block showing the configuration of the
wireless speaker system in the third embodiment of the present invention Block diagram
showing the configuration of the conventional wireless speaker system
Explanation of sign
[0028]
1 infrared or radio frequency signal (for audio signal) 2 very high frequency (microwave) 3 audio
input signal 4 infrared or radio frequency signal (for receiving position information) 10
transmitter 11 input signal processor 12 audio signal transmitter 14 power unit DESCRIPTION
OF SYMBOLS 15 Power transmission part 151 Power receiving part detection means 152 Power
transmission part control means 20 Speaker apparatus 22 Audio signal reception part 23
Reception signal processing part 24 Power supply part 25 Power receiving part 251 Power
receiving position transmission means 26 Secondary battery 27 Amplification output part 28
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Speaker 30 connector 40 distribution truck
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