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DESCRIPTION JP2007165940

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DESCRIPTION JP2007165940
An object of the present invention is to provide a mobile phone capable of preventing wasteful
consumption of a battery due to forgetting to stop the sound signal reproduction operation.
SOLUTION: A detection microphone 117 with strong directivity is disposed in the vicinity of a
headset speaker 116 of a headset 118 connected to a signal I / F unit 106 of a mobile telephone
100, and an acoustic detection signal is reflected from the eardrum's eardrum. If the acoustic
signal from the audio signal generation unit 108 is heard by the headset 118 worn on the ear as
audible, the acoustic signal input to the headset 118 is compared with the acoustic detection
signal detected by the detection microphone 117 If they do not match, the operation of the audio
signal generator 108 is stopped assuming that the headset 118 is removed from the ear. When
the connection detection unit 105 detects that the headset 118 is not connected to the signal I /
F unit 106 during hearing with the headset 118, the operation of the audio signal generation unit
108 is stopped. [Selected figure] Figure 1
Mobile phone and method of automatically stopping sound reproduction operation of mobile
phone
[0001]
The present invention relates to a mobile phone and a method of automatically stopping sound
reproduction operation of the mobile phone. In particular, the present invention relates to a
technique for preventing wasteful power consumption when a small sound output device is
removed from the ear when playing music by connecting the small sound output device (headset
or the like) to a mobile phone.
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[0002]
2. Description of the Related Art In recent years, the functions of mobile phones have been
further improved, and mobile phones having music reproduction functions (sound reproduction
functions) have been widely sold to the market. As a method of realizing the music reproduction
function of the mobile phone, there is a method of listening to music by ringing a speaker of the
mobile phone main body and a small sound output device such as a headset etc. connected to the
mobile phone main body to use a headset etc. A method of wearing on a person's ear and hearing
it is generally used.
[0003]
Here, when a sudden business event occurs for a user who is listening to music (for example, a
sudden call to someone or a sudden occurrence of a visitor such as a sudden visitor occurs and
the situation of sudden termination of hearing occurs) In the situation where the latter headset or
the like is used to hear music, that is, in the situation where a small sound output device such as
a headset is connected to the mobile phone to hear the music, As a result of dealing with sudden
events by removing a small sound output device such as a headset from the ear, there is a
possibility that the user may forget that music is being played back on the mobile phone
thereafter. high. When such a situation occurs, the music playback on the mobile phone
continues to operate, and the battery of the mobile phone is consumed wastefully without the
user being aware, and the battery is finally discharged. There was a problem in use.
[0004]
In order to solve such a problem, in Japanese Patent Application Laid-Open No. 2004-164263
"Portable Electronic Device" shown in Patent Document 1, hearing reproduction music separately
from the battery supplying power to the telephone function unit of the portable telephone is
disclosed. A technology has been proposed in which an external battery is provided in the
headphone, and power is supplied from the external battery to the circuit for music reproduction
in the mobile phone at the time of music playback so that power consumption of the battery of
the mobile phone is avoided. ing.
[0005]
In Japanese Patent Application Laid-Open No. 11-275694 "Hearing aid" shown in Patent
Document 2, the hearing aid is provided with an infrared sensor, and when the hearing aid is
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inserted into the ear, the amount of infrared radiation emitted by eardrum temperature is
detected by the infrared sensor. There has been proposed a technique for controlling the power
of a hearing aid on / off by measuring according to.
[0006]
Moreover, in Japanese Patent Laid-Open No. 2003-029773 "Power Control Method and Device
for Electronic Device" shown in Patent Document 3, as a power saving technology of electronic
device such as MD player, the electronic device is connected to a mobile phone. There has been
proposed a technique for setting the power of the electronic device to OFF when no operation is
performed for a certain period of time for an incoming call to the mobile phone.
JP-A-2004-164263 (page 5-8) JP-A-11-275694 (page 3-4) JP-A 2003-029773 (page 3-4)
[0007]
However, the conventional techniques for preventing wasted power consumption of the mobile
phone have the following problems, and are not effective solutions.
[0008]
For example, in the technology of Patent Document 1, it is necessary to provide an external
battery in a headphone which is strongly required to be reduced in size and weight, and there is a
problem that the size and weight of the headphone can not be reduced.
Further, in the technology of Patent Document 2, the amount of infrared radiation emitted by
tympanic membrane temperature involves individual differences among individual users, and as
a so-called general-purpose technology applicable to an unspecified number of users. There is a
risk that it will be insufficient.
Further, the technique of Patent Document 3 requires a mobile phone in addition to the power
saving target electronic device and is a technique in which the operation of the user is essential,
so as to effectively prevent wasteful power consumption. There is a drawback that it is difficult to
realize the purpose of
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[0009]
The present invention has been made in view of such circumstances, and an object of the present
invention is a state where a small-sized sound output device externally connected to a mobile
phone, such as a headset, is attached to the ear. If a small sound output device is removed from
the ear during sound reproduction (such as music reproduction), a function capable of detecting
whether or not it has been detected reliably and without reducing the size and weight has been
When the connection between a small sound output device that hears the reproduced sound,
such as a headset, and the mobile phone is opened, the reproduction operation of the sound
signal such as a music signal is automatically stopped to prevent the stop of the battery. An
object of the present invention is to provide a portable telephone and a method of automatically
stopping the sound reproduction operation of the portable telephone, in which wasteful
consumption is prevented and the convenience in use is improved.
[0010]
That is, when playing music using a small sound output device such as a headset in a mobile
phone, the small sound output device such as a headset is detected as to whether or not it is
attached to a human body and not attached. When it detects that the small sound output device
which hears the reproduced sound, for example, a headset, etc. is not connected to the portable
telephone, the reproduction operation of the sound such as music is automatically stopped. By
doing this, it is aimed to save power.
[0011]
In order to solve the above-described problems, the portable telephone and the method for
automatically stopping the sound reproduction operation of the portable telephone according to
the present invention employ the following characteristic configuration.
[0012]
(1) Connect an audio signal generation unit that generates an acoustic signal, an interface unit
that can be connected to a small-sized acoustic output device that is attached to the user's ear
and hears the sound, the audio signal generation unit, and the interface unit A mobile phone
having at least one of the following connectors: a high directivity detection microphone disposed
at a position close to the speaker of the small sound output device; and an ear of sound output
from the speaker of the small sound output device It further comprises a signal comparison unit
that compares an acoustic detection signal in which a reflected sound from the inside is collected
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by the detection microphone and converted into an electrical signal, and an acoustic signal
output from the audio signal generation unit. When the acoustic signal and the acoustic detection
signal do not match as a comparison result of the signal comparison unit, the operation of the
audio signal generation unit is stopped. Mobile phone that.
(2) If the acoustic signal and the acoustic detection signal do not match as a comparison result of
the signal comparison unit, instead of immediately stopping the operation of the audio signal
generation unit, a mismatch is detected and determined in advance. The mobile phone according
to the above (1), wherein the operation of the audio signal generator is stopped when a mismatch
is continuously detected until a predetermined time has elapsed.
(3) Connect an audio signal generation unit that generates an acoustic signal, an interface unit
that can be connected to a small-sized acoustic output device that is attached to the user's ear
and hears the sound, the audio signal generation unit, and the interface unit A micro-switch
capable of detecting whether or not the small acoustic output device is attached to the user's ear,
and the micro switch further comprising: The portable telephone which makes the operation of
the audio signal generator stop when it detects that the user does not wear the small-sized audio
output device.
(4) When it is detected that the microswitch does not wear the small sound output device on the
user's ear, it is not immediately worn, instead of stopping the operation of the audio signal
generator. The mobile phone according to (3), wherein the operation of the audio signal
generator is stopped when it is continuously detected that the camera is not attached until a
predetermined time elapses after detection. (5) The connection detection unit further detects
whether the small sound output device is connected to the interface unit, and the connection
detection unit detects the connection between the small sound output device and the interface
unit. In this case, the mobile phone according to any one of (1) to (4), wherein the operation of
the audio signal generation unit is started, and the audio signal generation unit and the small
acoustic output device are connected by the connection unit. (6) When the connection detection
unit is not in the state of connecting the small sound output device and the interface unit when
the sound signal from the audio signal generation unit is output to the small sound output device
The mobile telephone (5) according to (5), wherein if detected, the operation of the audio signal
generation unit is stopped, and the connection between the audio signal generation unit and the
small sound output device by the connection unit is released. (7) The user further has a button
portion operable by the user, and the user determines whether to permit activation of the
operation of the audio signal generation unit or whether to stop the operation of the audio signal
generation unit. The mobile phone according to any one of the above (1) to (6), which instructs
by operating the button portion. (8) The mobile phone according to any one of the above (1) to
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(7), wherein the small-sized sound output device is a headset. (9) Connect an audio signal
generation unit that generates an acoustic signal, an interface unit that can be connected to a
small-sized audio output device that is attached to the user's ear and hears the sound, the audio
signal generation unit, and the interface unit An audio reproduction operation of the mobile
phone automatically stopping the operation of the audio signal generation unit which is a
generation source of the audio signal to be heard by the small audio output device, in the mobile
phone provided with at least In the stopping method, the reflected sound from the inside of the
ear of the sound output from the speaker of the small acoustic output device is collected by the
high directivity detection microphone disposed at a position close to the speaker of the small
acoustic output device. An acoustic detection step of outputting an acoustic detection signal, an
acoustic signal output from the audio signal generation unit, and the acoustic detection signal
And a signal comparison step of comparing the operation of the audio signal generation unit
when the sound signal and the sound detection signal do not match as a comparison result of the
signal comparison step. Sound reproduction operation automatic stop method of the portable
telephone.
(10) As a comparison result of the signal comparison step, when the acoustic signal and the
acoustic detection signal do not match, immediately after detecting the mismatch, instead of
stopping the operation of the audio signal generation unit, it is determined in advance. The
method according to the above (9), wherein the operation of the audio signal generator is
stopped when a mismatch is detected continuously until a predetermined time has elapsed. (11)
Connect an audio signal generation unit that generates an acoustic signal, an interface unit that
can be connected to a small-sized acoustic output device that is attached to the user's ear and
hears the sound, the audio signal generation unit, and the interface unit An audio reproduction
operation of the mobile phone automatically stopping the operation of the audio signal
generation unit which is a generation source of the audio signal to be heard by the small audio
output device, in the mobile phone provided with at least In the stopping method, a microswitch
capable of detecting whether or not the small acoustic output device is attached to the user's ear
is further provided in the small acoustic output device, and the microswitch outputs the small
acoustic output device. In the wearing detection step of detecting whether or not the user wears
the small acoustic output device, the user can Sound reproducing operation automatically
stopped method for a portable phone to stop when it detects an operation of the audio signal
generating unit that is not mounted to. (12) In the attachment detection step, when the micro
switch detects that the small acoustic output device is not attached to the user's ear, attachment
is performed instead of immediately stopping the operation of the audio signal generator. The
mobile phone according to the above (11), wherein the operation of the audio signal generator is
stopped when it is continuously detected that the camera is not attached until a predetermined
time elapses after detection of not having been detected. Sound playback operation automatic
stop method. (13) The method further includes a connection detection step of detecting whether
or not the small acoustic output device is connected to the interface unit, and the connection
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detection step detects a connection between the small acoustic output device and the interface
unit. In this case, the operation of the audio signal generation unit is activated, and the audio
reproduction operation automatic stop of the portable telephone according to any one of the
above (9) to (12) connecting the audio signal generation unit and the small acoustic output
device. Method. (14) In the state of outputting the acoustic signal from the audio signal
generation unit to the small-sized acoustic output device, the connection detecting step is that the
small-sized acoustic output device and the interface unit are not connected. When detected, the
operation of the audio signal generation unit is stopped, and the connection by the connection
unit between the audio signal generation unit and the small sound output device is opened, and
the sound reproduction operation automatic stop of the mobile telephone of (13) Method.
(15) The portable telephone further includes a button unit operable by the user, and whether to
permit activation of the operation of the audio signal generation unit or whether to stop the
operation of the audio signal generation unit is used The method according to any one of the
above (9) to (14), wherein the person instructs by operating the button portion. (16) The method
for automatically stopping the sound reproduction operation of the portable telephone according
to any one of the above (9) to (15), wherein the small-sized sound output device is a headset.
[0013]
According to the mobile telephone of the present invention and the method of automatically
stopping the sound reproduction operation of the mobile telephone, a small sound output device
such as a headset is used as a sound reproduction function for music etc. which has come to be
widely used as one function of the mobile telephone. When playing back a sound such as music,
the presence or absence of a small sound output device, for example, a headset such as a headset,
is detected to detect that it is not attached, or the reproduced sound is heard. When it is detected
that a small sound output device such as a headset is not connected to the portable telephone,
the reproduction of the sound such as music is automatically stopped. Therefore, during the
sound reproduction, for example, the reproduction during the music reproduction It is possible to
prevent useless battery consumption caused by forgetting to stop the operation, and to improve
convenience in using the mobile phone.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the mobile
telephone and the method for automatically stopping the sound reproduction operation of the
mobile telephone according to the present invention will be described below with reference to
the attached drawings.
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[0015]
(Features of the Present Invention) As one embodiment of the portable telephone according to
the present invention and the method of automatically stopping the sound reproduction
operation of the portable telephone, a small sound output device is used as a device for
outputting the reproduced music to the outside The features of the present invention will be
described for the case where the output device is a headset.
[0016]
The receiver of the headset, which is a small acoustic output device, has a microphone with high
directivity, and the reflected sound from the eardrum of the sound (such as music) output from
the speaker of the headset receiver worn on the user's ear Provide for detection.
In the microphone, the directivity is strong, and only the sound wave of the sound (such as
music) from the direction of the tympanic membrane in the ear can be collected, so the headset is
attached to the ear. Thus, for the first time, it is possible to collect the reflected sound of the
sound (such as music) output from the speaker of the headset.
[0017]
Therefore, when the headset is worn on the ear, the sound signal collected by the microphone
and output from the microphone is obtained as the same signal as the sound signal input to the
speaker of the headset. On the other hand, when the headset is removed from the ear, the
microphone can not collect the reflected sound of the sound output from the speaker of the
headset, so the acoustic signal from the microphone and the sound input to the speaker There is
no relationship between the two signals and the signals, and the two signals become inconsistent.
[0018]
Using such a relationship, the acoustic signal input to the speaker of the headset and the acoustic
signal collected by the microphone are compared, and if both are the same signal, the headset is
used It is judged that the music is worn on the ear of the person, and control is made to operate
the music reproduction, while when the signals of both are different, the headset is removed
from the user's ear It is determined that it is in the state, and control to stop music reproduction
is performed to stop useless power supply.
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[0019]
(Configuration of the Embodiment) The mobile phone of the present invention has a function of
detecting connection of a small sound output device such as a headset to the main body of the
mobile phone, and an output signal to a speaker such as a small sound output device such as a
headset. At least a function for comparing a speaker input signal with an output signal from a
microphone built in a small acoustic output device such as a headset such as a headset, ie, a
microphone output signal is provided, and as a comparison result, as described above When the
signal of (1) is different, the control of stopping the music reproduction operation is performed
to realize the function of stopping the useless power supply.
[0020]
FIG. 1 is a functional block diagram showing an example of a functional block configuration of a
mobile telephone for realizing the method of automatically stopping sound reproduction
operation of the mobile telephone according to the present invention, which is a compact audio
output device for outputting voice reproduced by the mobile telephone. As, the case where the
headset is used is shown.
[0021]
Similar to a normal mobile phone, the mobile phone 100 shown in FIG. 1 includes a control unit
101 that controls the overall operation of the mobile phone 100, a display unit 102 such as
liquid crystal, a button unit 103 for operation, various programs and data. A storage unit 104 for
storing is provided, and further, an antenna 123 for transmitting and receiving a wireless signal
to and from a wireless base station, a wireless unit 122, and a baseband processing unit 121 are
provided.
In addition, the portable telephone 100 transmits and receives voices between the user of the
portable telephone 100 and the user, the receiver 120, and voice (analog signal) input and
output between the portable telephone 100 and the user. And an audio signal processing unit
110 for converting the digital signal handled by the baseband processing unit 121.
[0022]
Furthermore, in the mobile phone 100 shown in FIG. 1, an audio signal generator 108 for
reproducing an audio signal (music signal or the like), a baseband processing unit 121, and an
audio signal to enable reproduction / listening of sound (music or the like). A call path switching
unit 111 for switching to the signal generation unit 108, a main body speaker 112, and a headset
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118 provided outside (that is, a headset receiver 115 incorporating a headset speaker 116, a
headset transmitter 114) A signal I / F (InterFace) unit 106 connected to the headset connection
terminal 113, and a signal switching unit 109 for switching between the transmitter 119, the
receiver 120, the main body speaker 112, and the signal I / F unit 106. Have.
[0023]
Furthermore, the portable telephone 100 shown in FIG. 1 is built in the headset receiver 115 to
determine whether the reproduction operation of sound (such as music) continues or not, and it
has a strong directivity detection microphone 117, a headset 118 and a signal. A connection
detection unit 105 that detects a connection with the I / F unit 106, and a signal comparison unit
107 that compares an acoustic signal input to the headset 118 with an acoustic detection signal
output from the detection microphone 117. There is.
[0024]
(Description of Operation of Embodiment) Next, the operation of the mobile phone 100 shown in
FIG. 1 will be further described.
[0025]
The control unit 101 of the mobile phone 100 has a function of detecting button information
input by the user from the button unit 103, a function of displaying various information on the
display unit 102, and a function of reading and writing data stored in the storage unit 104. ,
Function to start / stop reproduction operation of audio signal (sound signal) of the audio signal
generation unit 108, function to switch each call path of the signal switching unit 109 and the
call path switching unit 111, connection detection unit 105, signal comparison It has at least a
function of detecting signal information generated by the unit 107.
[0026]
The channel switching unit 111 has a function of switching the connection of the audio signal
processing unit 110 to either the channel of the baseband processing unit 121 or the channel of
the audio signal generating unit 108. By the control, connection of a communication path
between the baseband processing unit 121 and the audio signal processing unit 110 or
connection of a communication path between the audio signal generation unit 108 and the audio
signal processing unit 110 is performed.
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In the case of a call by wireless communication via the antenna 123, the communication path of
the former baseband processing unit 121 and the audio signal processing unit 110 is connected,
while the audio (music etc.) reproduction of the audio signal generating unit 108 is reproduced.
In this case, the connection of the communication path between the audio signal generator 108
and the audio signal processor 110 is performed.
[0027]
Similarly, the signal switching unit 109 connects the voice signal processing unit 110 to the
transmitter 119, the communication path with the receiver 120, the communication path with
the main body speaker 112, and the communication path with the signal I / F unit 106. In the
case of a call by wireless communication via the antenna 123 under the control of the control
unit 101, the communication path between the voice signal processing unit 110 and the receiver
120 or the transmitter 119 is selected. When the connection or the reproduction sound is to be
heard by the main body speaker 112, the connection of the communication path between the
audio signal processing unit 110 and the main body speaker 112, or when the reproduction
sound is to be heard by the headset speaker 116, the sound signal processing The connection of
the communication path between unit 110 and signal I / F unit 106 is performed.
[0028]
Note that the receiver 120, the transmitter 119, and the main body speaker 112 are sound units
built in the main body of the mobile phone 100, while the headset 118 is an audio section
outside the mobile phone 100, that is, a small sound. It is an output device, and can be connected
to the mobile phone 100 by connecting the headset connection terminal 113 to the signal I / F
unit 106.
That is, mobile phone 100 has signal I / F unit 106 connectable to external headset 118, and
headset receiver 115 of headset 118 and headset transmitter 114 transmit signals I / F. The F
unit 106 is connected via the headset connection terminal 113.
[0029]
Furthermore, the headset receiver 115 is a headset speaker 116 that outputs sound (such as
music) by ringing with an acoustic signal (such as a music signal) and reflected sound of sound
(such as music) output by the headset speaker 116. And a detection microphone 117 having
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strong directivity for collecting sound.
FIG. 2 is an external image diagram showing an example of the external appearance of the
headset receiver 115 externally connected to the mobile phone 100 according to an embodiment
of the present invention.
As shown in FIG. 2, the headset speaker 116 is disposed at the central portion of the headset
receiver 115 attached to the ear, and the sound output from the headset speaker 116 is slightly
offset from the central portion. A detection microphone 117 is disposed which detects the
reflection sound of a sound wave (such as music), converts it into an electrical signal, and outputs
it as an acoustic detection signal.
[0030]
The headset receiver 115 is connected to a headset line 115 a for transmitting and receiving an
acoustic signal to the headset speaker 116 and an acoustic detection signal from the detection
microphone 117 to and from the headset connection terminal 113.
The headset line 115 a can be connected to the signal I / F unit 106 of the mobile telephone 100
through the headset connection terminal 113.
[0031]
In addition, in the mobile phone 100 shown in FIG. 1, the signal I / F unit 106 includes the
headset connection terminal 113 of the headset 118 (that is, the headset receiver 115 and the
headset transmitter 114). The connection detection unit 105 is provided to detect that the
connection is made to the connection 106, and when the headset connection terminal 113 of the
headset 118 is connected to the signal I / F unit 106, the connection detection unit 105 detects
the headset 118. The connection information indicating that the connection is connected is sent
to the control unit 101.
[0032]
The audio signal processing unit 110 has a function of converting a digital signal of audio data or
sound (such as music) data into an analog signal format, or an analog signal of audio data into a
digital signal format. 121 converts the digital signal of the audio data transmitted from 121 into
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an analog signal, or converts the audio (such as music) data transmitted from the audio signal
generation unit 108 into an analog signal, and transmits the transmitter 119 or the head It has a
function of digitizing the analog signal of the voice data from the set microphone 114.
[0033]
With the above configuration, in the mobile phone 100 as shown in FIG. 1, which is an
embodiment of the present invention, ordinary telephone conversation using the receiver 120
and the transmitter 119 is possible, and when the headset 118 is connected, A call using the
headset receiver 115 and the headset 118 of the headset transmitter 114 is also possible.
[0034]
Further, when the user instructs the start of music reproduction by operating the button of the
button unit 103, the control unit 101 detects button information instructing the start of music
reproduction.
As a result, the control unit 101 activates the audio signal generation unit 108 and performs
switching control of the call path switching unit 111, and outputs an audio signal (such as a
music signal) from the audio signal generation unit 108 to the main body speaker 112. , Ring the
main body speaker 112.
[0035]
Furthermore, in such a music reproduction state, when the user connects the headset connection
terminal 113 of the headset 118 (ie, the headset receiver 115, the headset transmitter 114) to
the signal I / F unit 106, the connection is made. Connection information indicating that the
connection has been made is input from the connection detection unit 105 to the control unit
101.
As a result, the control unit 101 performs switching control of the signal switching unit 109,
switches from the main body speaker 112 to the signal I / F unit 106 side, and outputs an audio
signal (music signal etc.) from the audio signal generating unit 108 to the head. The voice signal
is output to the headset speaker 116 side of the set receiver 115 to ring the headset speaker
116.
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[0036]
At the same time, when switching to a state where sound (such as music) is output from the
headset speaker 116 of the headset receiver 115, an audio signal (such as a music signal) input
to the headset speaker 116 is output from the signal comparison unit 107. The sound wave of
sound (such as music) output from the headset speaker 116 while being input to one of the input
terminals is reflected by the tympanic membrane in the ear, and is detected by the detection
microphone 117 built in the headset receiver 115. The sound is collected and converted into an
acoustic detection signal.
The sound detection signal collected and converted by the detection microphone 117 is input to
the other input terminal of the signal comparison unit 107.
[0037]
Here, an example of the circuit configuration of the signal comparison unit 107 will be described.
FIG. 3 is a schematic circuit diagram showing an example of the circuit configuration of the
signal comparison unit 107 of the mobile phone 100 according to an embodiment of the present
invention.
The circuit of the signal comparison unit 107 is connected to the plus side input terminal and the
minus side input terminal of the comparator 308 through series input resistors R2 302 and R3
303 respectively connected in series to the input terminals Sin1 305 and Sin2 306, The output
terminal Sout 307 of the comparator 308 is connected to the level determination unit 309.
[0038]
As described above, each of the sound signal (such as a music signal) input to the headset
speaker 116 and the sound detection signal collected and converted by the detection microphone
117 is input to the input terminals Sin1 305 and Sin2 306, respectively. It is input and input to
the positive and negative input terminals of the comparator 308, respectively.
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[0039]
Therefore, for example, as shown in FIG. 4, both of an acoustic signal (such as a music signal)
input to the headset speaker 116 and an acoustic detection signal collected and converted by the
detection microphone 117 are completely If the signal waveforms are the same, the signal
components are not output at all to the output terminal Sout 307 of the comparator 308 due to
the addition of opposite phases in the comparator 308, and the level determination unit 309
indicating the comparison result The output of is also a “0 level” signal (match signal).
Here, FIG. 4 shows the case where an acoustic signal (such as a music signal) to the headset
speaker 116 of the mobile phone 100 according to an embodiment of the present invention and
an acoustic detection signal from the detection microphone 117 are the same signal. FIG. 16 is a
signal waveform diagram showing an example of an output waveform of the level determination
unit 309 of the signal comparison unit 107.
[0040]
On the other hand, as shown in FIG. 5, both the sound signal (music signal etc.) input to the
headset speaker 116 and the sound detection signal collected and converted by the detection
microphone 117 are completely different. If they are waveforms and they are unrelated to each
other, a large signal is output to the output terminal Sout 307 of the comparator 308, and the
output from the level determination unit 309 indicating the comparison result is both signals. Is
a signal (mismatch signal) of a predetermined signal level to indicate that they are different.
Here, FIG. 5 shows a case where the sound signal (such as a music signal) to the headset speaker
116 of the mobile phone 100 according to an embodiment of the present invention and the
sound detection signal from the detection microphone 117 are different signals. FIG. 16 is a
signal waveform diagram showing an example of an output waveform of the level determination
unit 309 of the signal comparison unit 107.
[0041]
Each of the resistors R1 301 to R4 304 is a resistor for adjusting the gain of the input signal of
each of the input terminals Sin1 305 and Sin2 306, and by adjusting each resistance value, the
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signal level of both input signals is obtained. It is possible to correct
[0042]
Further, as described above, the signal indicating the comparison result output from the output
terminal Sout 307 of the comparator 308 (that is, the signal indicating the determination result
of the presence or absence of the signal) is input to the level determination unit 309 and the
signal level is A comparison determination signal indicating coincidence or non-coincidence of
the two input signals to the signal comparison unit 107 is output.
The comparison determination signal of the signal comparison unit 107 is output to the control
unit 101.
[0043]
The operations of the baseband processing unit 121, the wireless unit 122, and the antenna 123
of the mobile phone 100 shown in FIG. 1 are not directly related to the sound reproduction
operation such as music reproduction or the sound reproduction stop operation targeted by the
present invention. Therefore, although the detailed description here is omitted, as in the case of a
normal portable telephone, the respective functions unique to the portable telephone are
realized.
[0044]
(Description of Operation Example of Sound Reproduction Operation Automatic Stop Method)
Next, an example of the operation showing the sound reproduction operation automatic stop
method in the mobile phone 100 of FIG. 1 as one embodiment of the present invention will be
described with reference to the drawings. Do.
[0045]
First, the output and reflection of sound waves of sound (such as music) when the headset
receiver 115 is worn on the ear will be described with reference to FIG.
Here, FIG. 6 is an explanatory view for explaining an outline of sound waves of sounds (such as
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music) when the headset receiver 115 externally connected to the mobile phone 100 according
to an embodiment of the present invention is worn on the ear. is there.
[0046]
When the headset receiver 115 is attached to the ear, the hole of the ear 401 is a narrow space,
and the headset receiver 115 attached to the ear 401 is in close contact with the outside of the
ear wall close to the outside.
For this reason, as shown in FIG. 6, the sound wave of sound (such as music) output from the
headset speaker 116 of the headset receiver 115 travels straight through the hole (ear) of the ear
401 to the tympanic membrane 402 and propagates. , And are reflected by the tympanic
membrane 402.
As a result, the reflected sound is transmitted to the headset speaker 116 as a reflected sound,
collected by the detection microphone 117 disposed in the vicinity of the headset speaker 116,
converted into an electric signal as an acoustic detection signal, and extracted.
The acoustic detection signal extracted from the detection microphone 117 is input to the other
input terminal of the signal comparison unit 107 as described in FIG.
[0047]
On the other hand, when the headset receiver 115 is not attached to the ear, the sound wave of
sound (such as music) output from the headset speaker 116 of the headset receiver 115 is
radiated into a wide space, and the headset Sound waves of sound (such as music) output from
the speaker 116 are not reflected toward the headset speaker 116. Therefore, the strong
directivity detection microphone 117 disposed in the vicinity of the headset speaker 116 can not
collect the reflected sound of the sound (such as music) output from the headset speaker 116.
That is, in the detection microphone 117, only environmental noise in the vicinity of the
detection microphone 117 which is completely different from the sound wave of the sound (such
as music) from the headset speaker 116 is collected and converted. It will be input to the
terminal.
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[0048]
Next, an example of the operation showing the method of automatically stopping the sound
reproduction operation in the mobile phone 100 of FIG. 1 which is an embodiment of the present
invention will be described using the control flowchart of FIG. Here, FIG. 7 is a control flowchart
for explaining an example of the operation showing the method of automatically stopping the
sound reproduction operation in the cellular phone 100 according to one embodiment of the
present invention, which is activated at predetermined constant cycles. Processing is shown.
[0049]
The control unit 101 reads data of a music activation flag indicating the presence or absence of
music reproduction operation from the storage unit 104 (step S1), and determines whether the
music activation flag is ON or OFF (step S2). In the initial state, assuming that the sound
reproduction operation (music reproduction operation, etc.) is not activated, the music activation
flag is in the OFF state (NO in step S2), and the operation of the audio signal generation unit 108
is stopped. And control the channel switching unit 111 to connect the baseband processing unit
121 and the audio signal processing unit 110 (step S3), and continue the monitoring state of the
user's music playback activation operation (step S3) S4).
[0050]
When the user does not perform a button operation of a music reproduction start instruction at
the button unit 103 (NO in step S4), the process ends, and this state is maintained until the
control flowchart is started again in the next cycle. continue.
[0051]
On the other hand, when the user issues an instruction to start music reproduction by operating
the button unit 103 (YES in step S4), the music start flag is set to the ON state and registered in
the storage unit 104 (step S5).
Thereafter, the present process is ended, and this state is continued until the control flowchart is
activated again in the next cycle.
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[0052]
When the user issues an instruction to start music reproduction by operating the button unit 103
(YES in step S4), when the process is started again in the next cycle, the control flowchart in the
next cycle starts. Since it is determined that the music activation flag is in the ON state as a result
of the music activation flag determination processing (YES in step S2), the control unit 101
activates the audio signal generation unit 108 and the call path switching unit 111. Are
controlled to connect the audio signal generator 108 and the audio signal processor 110 (step
S6). Then, the state of monitoring the stop of the music reproduction by the button operation of
the button section 103 of the user is entered (step S7). If audio signal generation unit 108 has
already been activated, and audio signal generation unit 108 and audio signal processing unit
110 have already been connected, audio signal generation unit 108 continues the state as it is.
Further activation of the communication channel switching unit 111 and control of the channel
switching unit 111 are not performed.
[0053]
When the user performs an operation to stop music reproduction by operating the button unit
103 (YES in step S7), the music activation flag is set to the OFF state and registered in the
storage unit 104 (step S8). The process is ended, and this state is continued until the control
flowchart is started again in the next cycle.
[0054]
When the music activation flag is set to the OFF state, it is determined that the music activation
flag is in the OFF state as a result of determination processing of the music activation flag in the
control flowchart activated in the next cycle (NO in step S2). The operation of the audio signal
generation unit 108 is stopped, and the communication path switching unit 111 is further
controlled to connect the baseband processing unit 121 and the audio signal processing unit 110
(step S3).
[0055]
On the other hand, when the user continues the music reproduction without performing the
operation of stopping the music reproduction by the button operation of the button unit 103
(YES in step S7), the control unit 101 detects the detection result of the connection detection unit
105. Are read out (step S9), and it is determined whether the headset connection terminal 113 of
the headset 118 (ie, the headset receiver 115 or the headset transmitter 114) is connected to the
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signal I / F unit 106 (step S9). Step S10).
[0056]
When the headset connection terminal 113 of the headset 118 is not connected to the signal I /
F unit 106 (NO in step S10), the control unit 101 controls the signal switching unit 109 so that
the audio signal processing unit 110 and the main unit The speaker 112 is connected, and an
audio signal (such as a music signal) from the audio signal generation unit 108 is output to the
main body speaker 112 (step S11).
By this series of operations, the music reproduction sound is reproduced from the main body
speaker 112 of the mobile telephone 100.
[0057]
On the other hand, when the headset connection terminal 113 of the headset 118 is connected to
the signal I / F unit 106 (YES in step S10), the control unit 101 recognizes connection of the
headset 118 through the connection detection unit 105. Control the signal switching unit 109 to
connect the audio signal processing unit 110 and the signal I / F unit 106, and the audio signal
(such as a music signal) from the audio signal generating unit 108 is transmitted to the signal I /
F unit 106. Output to the side (step S12).
By such connection switching control, the music reproduction sound from the audio signal
generation unit 108 is reproduced from the headset receiver 115 via the signal I / F unit 106
and the headset connection terminal 113.
[0058]
At this time, an audio signal (such as a music signal) output to the headset speaker 116 is
branched at a portion passing through the signal switching portion 109 and is also input to one
input terminal of the signal comparison portion 107. .
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Also, when the headset 118 is worn on the ear, the sound wave of sound (such as music) output
from the headset speaker 116 of the headset receiver 115 causes the ear canal of the ear 401 as
described in FIG. It goes straight and is reflected by the tympanic membrane 402, and reaches
the headset receiver 115 as a reflected sound. The reflected sound is collected by the detection
microphone 117 disposed near the headset speaker 116 of the headset receiver 115, converted
into an electrical signal, and output as an acoustic detection signal. The sound detection signal
output from the detection microphone 117 is input to the other input terminal of the signal
comparison unit 107.
[0059]
As described above, when the headset 118 is worn on the ear, as shown in FIG. 4 described
above, an acoustic signal to the headset speaker 116 input to each of the two input terminals of
the signal comparison unit 107 ( Since the music signal and the like and the sound detection
signal from the detection microphone 117 are obtained as substantially the same signal
waveform, as described above, both of the signals match in the comparator 308 of the signal
comparison unit 107. A signal (match signal) of signal level “0” indicating that both signals
match is output as a comparison determination signal from the level determination unit 309 of
the signal comparison unit 107. Ru.
[0060]
Therefore, the control unit 101 reads out the comparison determination signal from the level
determination unit 309 of the signal comparison unit 107 (step S13), and the comparison
determination signal indicates that the two signals are in agreement. (“Coincidence signal”)
(YES in step S14), it is determined that the headset 118 is attached to the ear, and the audio
reproduction operation such as music reproduction by the headset 118 is continued It will be
done.
[0061]
On the other hand, when the headset 118 is removed from the state of being attached to the ear,
the reflection of sound (such as music) from the headset speaker 116 occurring inside the ear is
reflected. The sound does not reach the headset speaker 116 side, and the detection microphone
117 provided in the vicinity of the headset speaker 116 is a microphone with a strong directivity,
so the direct sound output from the headset speaker 116, ie, Also, the sound wave of the sound
(such as music) itself output from the headset speaker 116 can not be detected.
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Therefore, the detection microphone 117 is in a state of collecting ambient noise that is
completely unrelated to the sound wave of the sound (such as music) output from the headset
speaker 116.
[0062]
That is, when the headset 118 is removed from the ear during sound reproduction operation
such as music reproduction, the headsets are respectively input to the two input terminals of the
signal comparison unit 107 as shown in FIG. 5 described above. Since an acoustic signal (such as
a music signal) to the speaker 116 and an acoustic detection signal from the detection
microphone 117 are obtained as completely different signals, the comparator 308 of the signal
comparison unit 107 indicates that the two signals do not match. A comparison result signal is
obtained, and as a comparison determination signal from the level determination unit 309 of the
signal comparison unit 107, a “signal present” signal (inconsistent signal) having a large signal
level indicating that both signals do not match is output. Ru.
[0063]
Therefore, the control unit 101 reads out the comparison determination signal from the level
determination unit 309 of the signal comparison unit 107 (step S13), and as the comparison
determination signal, the signal level indicating that both signals do not match is large. If it is a
signal “not present” signal (mismatch signal) (NO in step S14), it is determined that the
headset 118 is in a state of being removed from the ear, and the music activation flag is set to
the OFF state. It will be registered in 104 (step S15).
[0064]
Since the music activation flag is set to the OFF state, it is determined that the music activation
flag is in the OFF state again as a result of determination processing of the music activation flag
in the control flowchart activated in the next cycle (step S2 (NO), the operation of the audio
signal generation unit 108 is stopped again, and the channel switching unit 111 is further
controlled to connect the baseband processing unit 121 and the audio signal processing unit 110
( Step S3).
As a result, it is possible to suppress unnecessary power consumption associated with the sound
reproduction operation (such as music reproduction operation) that the user has not heard.
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[0065]
(Description of Effects of the Present Embodiment) As described above, according to the present
embodiment showing an example of the present invention, the headset 118 attached to the ear is
connected to the mobile phone 100 and, for example, as playback sound, For a user who is
listening to music, as in the case of a sudden business event, by forgetting to stop the sound
reproduction operation such as music reproduction that is likely to occur by unknowingly
removing the headset 118 from the ear The useless consumption of the battery of the mobile
phone 100 and finally, the problem of use of the mobile phone 100 that the battery is completely
discharged can be improved.
[0066]
In the description of the embodiment of the present invention, an example is shown in which the
presence / absence of attachment of the headset 118 to the ear is detected by incorporating the
detection microphone 117 in the headset receiver 115, but instead of the detection microphone
117. For example, even if the headset 118 is provided with a micro switch or the like capable of
detecting the attachment of the headset 118 to the ear, and the presence or absence of the
attachment to the ear is detected by the micro switch or the like, the same effect is obtained. Is
obtained.
[0067]
Furthermore, in the state where the sound wave of the sound such as music is not output to the
main body speaker 112 during the sound reproduction operation such as music reproduction,
that is, the state where the reproduction sound such as music is output by the headset 118 When
it is detected by the connection detection unit 105 that the headset 118 is not connected to the
mobile telephone 100, the sound reproduction operation such as music reproduction may be
stopped.
[0068]
Further, in the above-described embodiment, when the user performs a button operation
instructing start of the sound reproduction operation such as music reproduction, the case where
the music start flag is turned ON and the operation of the audio signal generation unit 108 is
started is assumed. Although shown, it is assumed that the button operated by the user indicates
whether or not the activation of the sound reproduction operation such as music reproduction is
permitted, and the head connected to the mobile phone 100 in a state where this button
operation is performed. The operation of the audio signal generator 108 may be activated only
when it is detected that the set 118 is worn on the ear.
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[0069]
Further, in the above-described embodiment, although it has been described that the sound
reproduction operation such as music reproduction is immediately stopped when it is detected
that the headset 118 is not attached to the ear, the present invention is not limited to this. It is
not limited to such a case.
Even if the headset 118 accidentally comes off from the ear, if you reattach the headset 118 to
the ear again, you can continue to hear the sound such as the reproduced music Good.
[0070]
That is, even if it is detected that the headset 118 is not worn on the ear, the sound reproduction
operation such as music reproduction is not stopped until the predetermined time elapses. Even
when the headset 118 is not attached to the ear continues for a predetermined period of time,
the sound playback operation such as music playback may be stopped for the first time.
Furthermore, when it is detected that the headset 118 is not worn on the ear, the user may be
warned by a warning lamp or a warning sound.
[0071]
The configuration of the preferred embodiment of the present invention has been described
above.
However, it should be noted that such examples are merely illustrative of the present invention
and do not limit the present invention in any way.
Those skilled in the art will readily understand that various modifications can be made according
to a particular application without departing from the scope of the present invention.
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[0072]
It is a functional block diagram showing an example of a functional block configuration of a
mobile phone for realizing the method of automatically stopping sound reproduction operation
of the mobile phone according to the present invention.
It is an external appearance image figure showing an example of the external appearance of the
headset receiver externally connected to the mobile phone which is one example of the present
invention.
FIG. 2 is a schematic circuit diagram showing an example of a circuit configuration of a signal
comparison unit of a mobile phone according to an embodiment of the present invention. An
output waveform of the level determination unit of the signal comparison unit when an acoustic
signal (such as a music signal) to a headset speaker of a mobile phone according to an
embodiment of the present invention and an acoustic detection signal from a detection
microphone are the same signal. FIG. 6 is a signal waveform diagram showing an example of An
output waveform of the level determination unit of the signal comparison unit when an acoustic
signal (such as a music signal) to a headset speaker of a mobile phone according to an
embodiment of the present invention is different from an acoustic detection signal from a
detection microphone. FIG. 6 is a signal waveform diagram showing an example of It is
explanatory drawing for demonstrating the outline | summary of the sound wave of the sound
(music etc.) at the time of mounting | wearing an ear the headset receiver externally connected to
the mobile telephone which is one Example of this invention. It is a control flowchart for
demonstrating an example of operation | movement which shows the sound reproduction
operation automatic stop method in the mobile telephone which is one Example of this invention.
Explanation of sign
[0073]
100 mobile phone 101 control unit 102 display unit 103 button unit 104 storage unit 105
connection detection unit 106 signal I / F (InterFace) unit 107 signal comparison unit 108 audio
signal generation unit 109 signal switching unit 110 audio signal processing unit 111 call path
switching Part 112 Main unit speaker 113 Headset connection terminal 114 Headset transmitter
115 Headset receiver 115a Headset wire 116 Headset speaker 117 Detection microphone 118
Headset 119 Transmitter 120 Receiver 121 Base band processing unit 122 Radio unit 123
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Antenna 301 Antenna 301 Resistor R1 302 Series input resistor R2 303 Series input resistor R3
304 Resistor R4 305 Input terminal Sin1 306 Input terminal Sin2 307 Output terminal Sout 308
Comparator 309 Level judgment unit 401 Ear 402 Eardrum
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