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DESCRIPTION JP2006157683

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DESCRIPTION JP2006157683
PROBLEM TO BE SOLVED: To provide an onboard adapter capable of preventing a voice based
on an audio device from disturbing a call, and an onboard system using the same. SOLUTION: A
handsfree mode start signal S1 is supplied to a mobile phone side input / output terminal 11. The
handsfree mode start signal S1 is a signal corresponding to the start of the handsfree mode.
When the hands-free mode start signal S1 is supplied to the mobile phone side input / output
terminal 11, the signal processing unit 12 generates a volume level down signal S2. The volume
level down signal S2 is a signal for reducing the level of the sound based on the audio device 60
among the sounds output from the speakers 71 and 72. [Selected figure] Figure 1
Vehicle adapter and vehicle system using the same
[0001]
The present invention relates to an in-vehicle adapter and an in-vehicle system using the same.
[0002]
In order to prevent an accident while driving a car while using a mobile phone, a hands-free
function for a mobile phone is spreading.
The hands-free function for mobile phones is a function for using a mobile phone without using a
hand while driving a car. For example, Patent Document 1 discloses a general hands-free device.
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1
[0003]
The conventional handsfree device described in Patent Document 1 and the like generally
includes a signal processing unit, a speaker, and a microphone. The signal processing unit is
connected to the mobile phone, the speaker is disposed at a position where the driver can hear
the other party's voice, and the microphone is disposed at a position where the driver's voice is
spread.
[0004]
When a call is received to the mobile phone, the handsfree device can automatically
communicate with the other party, and the voice of the other party is output from the speaker,
and the driver who has spread with the microphone via the mobile phone Send voice to the other
party.
[0005]
According to such a hands-free device, since it is possible to use the mobile phone without using
the hand, it is possible to avoid a situation where the hand is blocked by the operation of the
mobile phone while driving the car and the steering wheel operation of the car is disturbed. Is
prevented in advance.
[0006]
By the way, a car is equipped with an on-vehicle audio device, and a call may be received while
listening to music flowing from the audio device.
Because the music flowing from the audio device interferes with the call using the handsfree
device, the driver needs to reduce the volume of the audio device before starting the call using
the handsfree device.
[0007]
For this reason, conventionally, even when a handsfree device is used, there is a risk that the
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2
driver may find a volume operation button or may close the hand in order to operate the volume
operation button, which may cause trouble in steering of the vehicle.
In addition, there was a possibility that the user was distracted by the volume operation and was
careless in the forward direction, leading to an automobile accident.
[0008]
Moreover, since the on-vehicle audio device is provided in a narrow space near the driver's seat
of the automobile, the volume operation button may be provided in a place where the driver is
difficult to operate. In this case, the volume operation button is searched and operated It will be
more difficult to do. Also, at night, the audio device itself is often in the dark, which makes it even
more difficult to find and operate the volume control buttons. JP, 2002-57773, A
[0009]
An object of the present invention is to provide an on-vehicle adapter capable of preventing a
voice based on an audio device from blocking a call, and an on-vehicle system using the same.
[0010]
Another object of the present invention is to provide an on-vehicle adapter capable of preventing
a trouble in driving or being careless in the forward direction, and an on-vehicle system using the
same.
[0011]
In order to solve the problems described above, an on-vehicle adapter according to the present
invention includes a mobile phone side input / output terminal and a signal processing unit.
The mobile phone side input / output terminal is supplied with a handsfree mode start signal.
The signal processing unit generates a volume level down signal when the handsfree mode start
signal is supplied to the mobile phone side input / output terminal. The volume level down signal
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is a signal for reducing the level of the sound based on the audio device among the sounds
output from the speaker.
[0012]
The in-vehicle adapter according to the present invention is combined with a mobile phone, a
hands-free device, an audio device, and a speaker to constitute an in-vehicle system. The mobile
phone is connected to the on-board adapter via the handsfree device. The audio device is
connected to a car adapter. The speaker reduces the level of the sound based on the audio device
among the sounds output from the speaker in the hands-free mode.
[0013]
Here, in the in-vehicle adapter used in the in-vehicle system according to the present invention,
the signal processing unit generates a volume level down signal when the handsfree mode start
signal is supplied to the mobile phone side input / output terminal.
[0014]
Therefore, in the on-vehicle system according to the present invention, when the handsfree mode
is entered, the level of the sound based on the audio device among the sounds output from the
speaker is lowered, and the sound based on the audio device interferes with the call. There is no
[0015]
For this reason, unlike the conventional case, the driver does not have to operate the volume of
the audio device, and the hand is closed in order to operate the volume operation button, which
may cause trouble in the steering operation of the car or Being taken carelessly in front of you,
eliminating the possibility of causing a car accident.
[0016]
Other features of the present invention and the operation and effects thereby will be described in
more detail by way of examples with reference to the accompanying drawings.
[0017]
FIG. 1 is a block diagram showing an embodiment of an in-vehicle system according to the
present invention, and FIG. 2 is a time chart of the in-vehicle system shown in FIG.
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[0018]
In FIG. 1, an on-vehicle system according to the present invention includes an on-vehicle adapter
10, a mobile phone 40, a hands-free device 50, an audio device 60, and speakers 71 and 72.
The in-vehicle adapter 10 includes a mobile phone side input / output terminal 11, a signal
processing unit 12, and an in-vehicle device side input / output terminal 13.
[0019]
The mobile phone 40 is connected to the on-vehicle adapter 10 via the hands-free device 50.
The hands-free device 50 may be configured by, for example, an electric circuit or may be
configured by software.
The hands-free device 50 may be integrated with the mobile phone 40.
[0020]
The audio device 60 is connected to the in-vehicle adapter 10.
The audio device 60 is, for example, a radio tuner, a cassette deck, a CD / MD player or the like.
The speaker 71 is connected to the in-vehicle adapter 10. The speaker 72 is connected to the
audio device 60. The number of speakers 71, 72 is arbitrary.
[0021]
Next, the operation of the in-vehicle system of FIG. 1 will be described with reference to FIG.
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[0022]
First, when the mobile phone 40 of the driver of the vehicle is not called, the hands-free device
50 and the on-vehicle adapter 10 do not operate.
At this time, the speaker 72 outputs a sound based on the signal S60 output from the audio
device 60, and the speaker 71 does not output a sound.
[0023]
Next, as shown in FIG. 2, when the mobile phone 40 receives a call, the handsfree device 50
generates a handsfree mode start signal S1 unless the call button of the mobile phone 40 is
operated within a predetermined time. Do. The handsfree mode start signal S1 is a signal
corresponding to the start of the handsfree mode.
[0024]
When the hands-free mode is set, the hands-free mode start signal S1 is supplied to the mobile
phone side input / output terminal 11 of the on-vehicle adapter 10. When the hands-free mode
start signal S1 is supplied to the mobile phone side input / output terminal 11, the signal
processing unit 12 generates a volume level down signal S2.
[0025]
The volume level down signal S2 is a signal for reducing the level of the sound based on the
audio device 60 among the sounds output from the speakers 71 and 72. The volume level down
signal S2 turns off the power of the audio device 60, adjusts the volume so that the output signal
S60 of the audio device 60 becomes small, or disconnects between the audio device 60 and the
speakers 71 and 72 (offline) ) Is a signal for causing For example, in the figure, the audio device
60 is controlled based on the volume level down signal S2, and the power is turned off.
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[0026]
At this time, since the power of the audio device 60 is turned off in the speaker 72, the audio
level based on the audio device 60 becomes zero. The speaker 71 is supplied with the first call
voice signal S10 from the in-vehicle adapter 10, and outputs a voice level based on the first call
voice signal S10. The first call voice signal S10 is a signal corresponding to the voice of the other
party of the mobile phone.
[0027]
As described above, in the on-vehicle adapter according to the present invention, the hands-free
mode start signal S1 is input to the mobile phone side input / output terminal 11, and the signal
processing unit 12 transmits the hands free mode to the mobile phone side input / output
terminal 11. When the start signal S1 is supplied, the volume level down signal S2 is generated.
[0028]
With this configuration, in the on-vehicle system according to the present invention, when the
hands-free mode is entered, the level of the sound based on the audio device 60 among the
sounds output from the speakers 71 and 72 decreases and the sound based on the audio device
60 Does not interfere with the call.
[0029]
Therefore, the driver does not need to operate the volume of the audio device 60 as in the
conventional case, and the hand may be closed in order to operate the volume operation button,
and the steering operation of the vehicle may be obstructed. Being taken carelessly in front of
you, eliminating the possibility of causing a car accident.
[0030]
FIG. 3 is a more detailed block diagram of the in-vehicle system shown in FIG.
In FIG. 3, the in-vehicle system according to the present invention further includes a microphone
80.
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The on-vehicle adapter 10 includes switching means 151 and 152.
[0031]
The mobile phone side input / output terminal 11 includes a handsfree mode start signal input
terminal 111, a first call voice signal input terminal 112, and a second call voice signal output
terminal 113.
The on-vehicle apparatus side input / output terminal 13 includes a first call voice signal output
terminal 131 and a second call voice signal input terminal 132.
[0032]
When the in-vehicle system shown in FIG. 1 enters the handsfree mode, the handsfree mode start
signal S1 is supplied to the handsfree mode start signal input terminal 111. A first call voice
signal S10 is supplied to the first call voice signal input terminal 112.
[0033]
The second call voice signal S 20 is supplied to the second call voice signal input terminal 132.
The second call voice signal S20 is a signal corresponding to the voice of the vehicle driver.
[0034]
When the hands-free mode start signal S1 is supplied to the hands-free mode start signal input
terminal 111, the signal processing unit 12 generates the volume level down signal S2 and
controls the switching units 151 and 152. The audio device 60 is controlled based on the volume
level down signal S2, and the power is turned off.
[0035]
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The switching means 151 connects the first call voice signal input terminal 112 and the first call
voice signal output terminal 131. Thus, the first call voice signal S10 is supplied to the speaker
71 via the first call voice signal output terminal 131 and output.
[0036]
The switching means 152 connects the second call voice signal input terminal 132 and the
second call voice signal output terminal 113. As a result, the second call voice signal S20 is
transmitted to the call partner via the second call voice signal output terminal 113, the handsfree
device 50 and the mobile phone 40.
[0037]
On the other hand, when not in the hands-free mode, the signal processing unit 12 controls the
switching units 151 and 152 to set the first call voice signal input terminal 112 and the second
call voice signal input terminal 132 to the reference potential (GND). Connect to As a result, no
signal is output from the first call voice signal output terminal 131 and the second call voice
signal output terminal 113.
[0038]
FIG. 4 is a block diagram showing another embodiment of the in-vehicle system according to the
present invention. The on-vehicle system shown in FIG. 4 is different from the on-vehicle system
shown in FIG. In the figure, the same reference numerals are given to parts that are the same as
the constituent parts shown in FIGS. 1 to 3, and redundant description will be omitted.
[0039]
In the in-vehicle system shown in FIG. 4, the switching means 153 is supplied with the volume
level down signal S2, and based on the volume level down signal S2, the first call voice signal
output terminal 131 is switched to the first call voice signal input terminal. 112 or connect to the
audio device 60.
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[0040]
In the on-vehicle system having such a configuration, when not in the hands-free mode, the
switching unit 153 is controlled by the signal processing unit 12 and connects the first call voice
signal output terminal 131 to the audio device 60.
As a result, only the sound based on the audio device 60 is output from the speaker 71.
[0041]
On the other hand, when the hands-free mode is set, the switching means 153 is controlled based
on the volume level down signal S2 generated by the signal processing unit 12, and the first call
voice signal output terminal 131 is used as the first call voice signal input. Connect to terminal
112. As a result, only the voice based on the first call voice signal S10 is output from the speaker
71.
[0042]
As described above, since the in-vehicle system shown can output the call voice in the hands-free
mode and the voice based on the audio device using the same speaker, the device can be
miniaturized and the cost can be reduced accordingly. Can be
[0043]
FIG. 5 is a block diagram showing still another embodiment of the in-vehicle system according to
the present invention.
In the figure, the same reference numerals are given to parts that are the same as the constituent
parts shown in FIGS. 1 to 4, and redundant description will be omitted.
[0044]
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The illustrated in-vehicle system includes a steering 20 and a switch unit 2. The on-vehicle
adapter 10 includes an infrared light emitting unit 14. The audio device 60 includes an infrared
light receiving unit 61.
[0045]
The steering 20 is a steering wheel for controlling the traveling direction of the vehicle. The
switch unit 2 is for controlling the audio device 60, for example, adjusting a radio tuner, playing /
stopping a cassette deck, a CD / MD player or the like, adjusting a volume, turning on / off a
power, and the like. The switch unit 2 is provided, for example, exposed on the central surface of
the steering 20. The infrared light projector 14 and the infrared light receiver 61 are provided at
positions where infrared communication can be performed with each other.
[0046]
In the on-vehicle system having such a configuration, when the driver operates the switch unit 2
when the hands-free mode is not set, the operation signal S5 based on the switch operation is
supplied to the signal processing unit 12. The signal processing unit 12 converts the operation
signal S5 into an infrared standard signal. The infrared light projector 14 emits the operation
signal S5 as an infrared signal.
[0047]
The infrared light receiving unit 61 receives the infrared signal emitted from the infrared light
projecting unit 14. The audio device 60 is controlled by the operation signal S5. The speaker 72
outputs a sound corresponding to the output signal S60 of the audio device 60.
[0048]
On the other hand, in the hands-free mode, the signal processing unit 12 generates a volume
level down signal S2. The infrared light projector 14 emits a volume level down signal S2 as an
infrared signal.
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[0049]
The audio device 60 is supplied with the volume level down signal S2 through the infrared light
receiving unit 61, and the level of the output signal is reduced based on the volume level down
signal S2. The speaker 72 outputs a low level sound corresponding to the output signal S60 of
the audio device 60.
[0050]
As described above, the in-vehicle system shown in the figure uses the infrared light emitting unit
14 and the infrared light receiving unit 61, which are provided in advance for controlling the
audio device, as means for transmitting the volume level down signal S2. Therefore, the device
can be miniaturized and the cost can be reduced.
[0051]
Further, in the illustrated on-vehicle system, since the infrared light emitting unit 14 and the
infrared light receiving unit 61 are used, the on-vehicle adapter 10 and the audio device 60 can
be easily connected without using a cable.
[0052]
Each of the in-vehicle adapter and the in-vehicle system of the embodiment illustrated in FIGS. 3
to 5 has substantially the same configuration as that of the in-vehicle adapter and the in-vehicle
system shown in FIGS. An effect can be obtained.
[0053]
In the above-described embodiment, even if the handsfree mode start signal S1, the first call
voice signal S10, the second call voice signal S20, and the volume level down signal S2 are
signals transmitted along the wiring, It may be a signal transmitted by radio such as radio waves
or infrared rays.
[0054]
In addition, when the handsfree mode start signal S1, the first call voice signal S10, and the
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second call voice signal S20 are wireless signals, the mobile phone side input / output terminal
11 and the in-vehicle device side input / output terminal 13 Is an antenna terminal.
[0055]
Further, the in-vehicle adapter and the in-vehicle system according to the present invention can
be used also when driving a vehicle other than an automobile.
[0056]
Although the contents of the present invention have been specifically described with reference to
the preferred embodiments, it is obvious that those skilled in the art can adopt various
modifications based on the basic technical concept and the teaching of the present invention. It
is.
[0057]
It is a block diagram showing one example of the in-vehicle system concerning the present
invention.
It is a time chart of the in-vehicle system shown in FIG.
It is a more detailed block diagram of the vehicle-mounted system shown in FIG.
It is a block diagram showing another example of the in-vehicle system concerning the present
invention.
It is a block diagram showing another example of the in-vehicle system concerning the present
invention.
Explanation of sign
[0058]
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DESCRIPTION OF SYMBOLS 10 in-vehicle adapter 11 mobile phone side input / output terminal
12 signal processing part 13 in-vehicle apparatus side input / output terminal 40 mobile phone
50 hands free device 60 audio device 71, 72 speaker
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