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JP2005175747

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DESCRIPTION JP2005175747
PROBLEM TO BE SOLVED: A portable communication comprising a first speaker to be pressed
against the ear to hear the sound in a casing consisting of a pair of cabinets 1 and 2 and a bone
conduction type second speaker to be pressed against the cheekbone to hear the sound The
terminal maintains an easy-to-hear reception sound even after switching from one speaker to the
other. SOLUTION: A mobile communication terminal according to the present invention can input
an adjustment value related to the operation state of the first speaker and an adjustment value
related to the operation state of the second speaker 4, and the adjustment of the first speaker
The correspondence relationship between the value and the adjustment value of the second
speaker 4 is stored, and when the speaker to be operated is switched from one speaker to the
other, the above-mentioned corresponding to the adjustment value at the switching time of the
one speaker The adjustment value of the other speaker is read out and set as the adjustment
value of the other speaker. [Selected figure] Figure 1
Mobile communication terminal
[0001]
The present invention relates to a communication terminal such as a portable telephone, and
more particularly to a communication terminal equipped with a bone conduction speaker.
[0002]
A handset equipped with a so-called bone conduction type speaker has been proposed as a
telephone set capable of sufficiently listening to the receiving sound even in the case of a user
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who has a deafening function such as an old man (see Patent Document 1).
When transmitting and receiving with this type of handset, the bone conduction speaker
provided on the handset is pressed against the cheekbones. As a result, the vibration generated
from the bone conduction speaker is transmitted to the cochlea via the skull, the vibration is
converted to an electrical signal in the cochlea, and the electrical signal is transmitted to the
brain through the auditory nerve, and as a result, the voice is recognized. It is possible to
Japanese Patent Application Publication No. 2003-174496 [H04M1 / 03]
[0003]
Therefore, in a portable telephone in which a transmitter and a receiver are disposed in a
portable casing, both a speaker (first speaker) and a bone conduction speaker (second speaker),
which are conventional general receivers as a receiver, are provided. It is conceivable to deploy
According to the mobile telephone, for example, in a call in a situation where noise is large such
as in a crowd, by switching from the first speaker to the second speaker, the reception sound
becomes easy to hear.
[0004]
However, while conventional general speakers add air vibration to the tympanic membrane to
transmit sound, bone conduction speakers apply vibration to the cheekbone to transmit sound
directly. An appropriate volume value or frequency characteristic of one speaker can not be said
to be appropriate even with the other speaker. Therefore, when switching from one speaker to
the other, if the adjustment values such as volume and frequency characteristics are maintained
as they are, the reception level may become excessive or too low, or the reception sound may be
offensive. And it becomes difficult to hear the received sound.
[0005]
Therefore, an object of the present invention is to switch from one speaker to the other in a
portable communication terminal provided with both a conventional general speaker (first
speaker) and a bone conduction speaker (second speaker). It is an object of the present invention
to provide a portable communication terminal in which an easy-to-hear reception sound is
maintained.
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2
[0006]
The portable communication terminal according to the present invention is provided with the
first speaker (24) and the second speaker (4) in the casing, and the adjustment value relating to
the operation state of the first speaker (24) and the second speaker Adjustment value input
means for inputting the adjustment value related to the operation state of (4), and the
relationship in which the correspondence between the adjustment value of the first speaker (24)
and the adjustment value of the second speaker (4) is stored When the storage means and the
speaker to be operated are switched from one speaker to the other, the adjustment value of the
other speaker corresponding to the adjustment value at the switching point of the one speaker is
read out from the relation storage means, And an adjustment value setting unit configured to set
the adjustment value of the other speaker.
[0007]
In the portable communication terminal according to the present invention, the relation storage
means stores a plurality of adjustment values (for example, volume values for defining the level
of the reception sound) for the first speaker (24), and these adjustment values A plurality of
adjustment values for the second speaker (4) that will exhibit the same acoustic effect are stored
corresponding to each of the above.
[0008]
For example, when switching to a call by the second speaker (4) during a call by the first speaker
(24), based on the adjustment value of the first speaker (24) at the switching time point, the
relation storage means corresponds to the adjustment value The adjustment value for the second
speaker (4) is read out, and the adjustment value is set to the second speaker (4).
Conversely, when switching to a call by the first speaker (24) during a call by the second speaker
(4), based on the adjustment value of the second speaker (4) at the switching time point, the
adjustment value from the relation storage means The adjustment value for the first speaker (24)
corresponding to is read out, and the adjustment value is set to the first speaker (24).
[0009]
In switching from one speaker to the other speaker described above, for the one speaker that was
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operating before the switching, a suitable adjustment value is set by the user, so the other
adjustment speaker is made to correspond to the adjustment value. The adjustment value set for
the speaker is also suitable for the user.
Therefore, the received sound is easy for the user to hear even after the speaker is switched.
[0010]
In the specific configuration, the casing is configured by openably and closably connecting a pair
of cabinets (1) and (2), and the first speaker (on the inner surface of the casing exposed by
opening both cabinets (1) and (2)) 24) is deployed, and the second speaker (4) is deployed on the
back of the casing, and the first speaker (24) is turned on and the second speaker (4) is opened
by opening both cabinets (1) and (2). While it is turned off, the first speaker (24) is turned off
and the second speaker (4) is turned on by closing both cabinets (1) and (2).
[0011]
In the specific configuration, in a state where the pair of cabinets (1) and (2) are opened, the first
speaker (24) is turned on to listen to the sound by pressing the first speaker (24) against the ear.
I can do it.
On the other hand, when the pair of cabinets (1) and (2) are closed, the second speaker (4) is
turned on and the user can hear the sound by pressing the second speaker (4) against the
cheekbones. .
[0012]
In a more specific configuration, the adjustment value input means includes main operation
means for changing adjustment values of the first speaker (24) and the second speaker (4) in
multiple steps, and both cabinets (1) ( 2) with the secondary operation means for changing the
adjustment value for the second speaker (4) in a plurality of steps in the closed state, and the
width of the adjustment value that can be changed by one operation of the secondary operation
means is It is larger than the width of the adjustment value that can be changed by one operation
of the operation means.
[0013]
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According to the specific configuration, when the pair of cabinets (1) and (2) are opened, the
adjustment values for the first speaker (24) and the second speaker (4) are changed to a plurality
of stages by the operation of the main operation means And set appropriate adjustment values.
Further, in the state where the pair of cabinets (1) and (2) are closed, the adjustment value for
the second speaker (4) can be changed to a plurality of levels by the operation of the sub
operation means, and an appropriate adjustment value can be set. .
Here, since the change width of the adjustment value by the sub operation means is larger than
the change width of the adjustment value by the main operation means, the user operates the
second speaker (4) by the operation of the sub operation means It can be clearly recognized that
the state is changing.
[0014]
According to the mobile communication terminal of the present invention, a reception sound that
is easy to hear is maintained even after switching from one speaker to the other.
[0015]
Hereinafter, embodiments of the present invention applied to a foldable mobile phone will be
specifically described with reference to the drawings.
In the foldable portable telephone according to the present invention, as shown in FIGS. 1 to 3,
the operation side cabinet (1) and the display side cabinet (2) are connected to be able to open
and close each other via a hinge mechanism (3), A foldable casing is constructed.
[0016]
As shown in FIG. 3, a plurality of operation keys (11) including a ten key and a ring key are
disposed on the inner surface of the operation side cabinet (1), and a side key (15) is disposed on
the side surface thereof. There is. Also, in the operation side cabinet (1), a transmitter (12)
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incorporating a microphone (13) is provided at the end opposite to the hinge mechanism (3). A
main display (21) consisting of a liquid crystal panel is disposed on the inner surface of the
display side cabinet (2), and a voice receiver incorporating a first speaker (24) at the end
opposite to the hinge mechanism (3) Department (22) is deployed.
[0017]
Furthermore, as shown in FIGS. 1 and 2, on the back of the display side cabinet (2), a sub display
(23) is disposed at the center and its end on the hinge mechanism (3) side is an elastic member A
bone conduction type second speaker (4) is provided via (5). As shown in FIG. 1, a recess is
formed on the surface of the transmitter (12) so that a part of the transmitter (12) is exposed
when both cabinets (1) and (2) are closed. ing. In addition, the display side cabinet (2) has a
shape in which the surface is raised from the end opposite to the hinge mechanism (3) toward
the installation portion of the second speaker (4), so as to conform to the shape The sub display
(23) is installed in an inclined attitude.
[0018]
FIG. 4 shows the electrical configuration of the foldable portable telephone according to the
present invention. A control circuit (6) including an ASIC, a DSP, a CPU and the like is connected
to the RF circuit (62) to which the antenna (61) is connected as shown. The control circuit (6) is
connected to the above-mentioned operation key (11) and side key (15), a clock generator (64)
for generating a clock to be provided for control operation, and power supply to necessary
circuits. A system power supply IC (65) to be supplied and an interface (63) for connecting an
external communication device etc. are connected.
[0019]
In addition, a codec (7) that executes modulation and demodulation processing is connected to
the control circuit (6), and the above-mentioned microphone (13) and first speaker (24) as well
as the above-mentioned microphone (13) are connected to the codec (7). A microphone (14) is
connected. Also, the above-mentioned second speaker (4) is connected to the codec (7) via the
amplifier (71) controlled to be on / off by the ON / OFF control signal from the control circuit (6),
and the incoming call is received. A notification speaker (16) is connected via a sound source IC
(72) for emitting a melody or the like. Furthermore, a memory (73) is connected to the control
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circuit (6) via a control bus, and the aforementioned main display (21) and sub display (23) are
connected via an LCD driver (74). There is.
[0020]
In the control circuit (6), as shown in FIG. 6, the volume setting value for the first speaker (24)
and the volume setting for the second speaker (4) are made to correspond to each of the nine
reception level setting values. Values and are stored as a table. When the volume setting value
for the first speaker (24) is directly used as the volume setting value for the second speaker (4),
the reception level of the second speaker (4) becomes excessive, so for the second speaker (4)
The volume setting value of is generally lower than the volume setting value for the first speaker
(24), and the amount of decrease is larger as the reception level setting value is larger. Therefore,
the user can change the reception level setting value to nine levels by key operation to select the
reception level that is most easy to hear.
[0021]
Further, the control circuit (6) stores a plurality of data (equalizer values) for defining the
equalizer frequency characteristics of the first speaker (24) shown in FIG. 7, and the second
speaker shown in FIG. A plurality of data (equalizer values) for defining the equalizer frequency
characteristics for (4) are stored. When the bone conduction type second speaker (4) is used,
there is a resonance point near 1 KHz, so as shown in FIG. 8, the reception sound is not annoying
by suppressing the gain slightly in the frequency band near 1 KHz. It is avoiding becoming a
thing. Also, at frequencies below 600 Hz, the received sound is made quiet by raising the gain
slightly. However, in the frequency band around 2 KHz, as shown in FIG. 7 and FIG. 8, the same
level of gain is maintained to realize a received sound that is easy for both the hearing person
and the deaf person to hear.
[0022]
According to the above-described foldable portable telephone, as shown in FIG. 1, in a state
where both cabinets (1) and (2) are folded, transmission and reception is performed by the
transmitting part (12) and the second speaker (4) of bone conduction type. While being possible,
as shown in FIG. 3, with both cabinets (1) and (2) open, transmission and reception is possible by
the transmitter (12) and the ordinary first speaker (24). It is also possible to switch the speakers
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between the first speaker (24) and the second speaker (4) by opening or closing both cabinets (1)
(2) during a call.
[0023]
FIG. 5 shows a procedure of switching control of the first speaker (24) and the second speaker
(4) according to the opening and closing of both cabinets (1) and (2). With the mode for enabling
the operation of the bone conduction type second speaker (4) set, first, in step S1, it is judged
whether or not there is an incoming call, and if it is judged yes, the process proceeds to step S2.
To determine if there was an off-hook operation.
[0024]
If YES in step S2, the communication operation is started in step S3, and it is then determined in
step S4 whether the casing is open. Here, if the casing is opened and it is judged as YES, the first
speaker (24) is turned on and the second speaker (4) is turned off in step S5, and then in step S6,
And the table are read out.
[0025]
Subsequently, in step S7, the read volume value and the equalizer value for the first speaker (24)
are set as the adjustment value of the operation state for the first speaker (24). Thereafter, in
step S8, it is determined whether or not there is a volume change operation, and if it is
determined as YES, the process proceeds to step S9, and volume is set at 9 levels of reception
level setting values 1 to 9 according to the user operation. After changing the value and updating
the reception level setting value, the process proceeds to step S15. If it is determined in step S8
that the answer is no, the process bypasses step S9 and proceeds to step S15.
[0026]
On the other hand, when the casing is closed at the start of a call and it is determined that the
answer is no in step S4, the first speaker (24) is turned off and the second speaker (4) is turned
on in step S10, At S11, the reception level setting value at that time and the table are read out.
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[0027]
Subsequently, in step S12, the read volume value and the equalizer value for the second speaker
(4) are set as the adjustment value of the operation state for the second speaker (4).
Thereafter, in step S13, it is determined whether or not there is a volume change operation by
the side key (15), and if it is determined yes, the process proceeds to step S14, and the reception
level setting value 1 according to the user's operation, After changing the volume value in three
stages of 5 and 9 and updating the reception level setting value, the process proceeds to step
S15. When it is judged as NO in step S13, the process bypasses step S14 and proceeds to step
S15.
[0028]
In step S15, it is determined whether or not there is an on-hook operation, and if it is determined
no, the process returns to step S4 and repeats the procedure of steps S4 to S15. Here, when the
casing is closed from the open state during a call, the processing of steps S5 to S9 is switched to
the processing of steps S10 to S14, and the first speaker (24) to the second speaker (4) is an
operation speaker Is switched, and based on the table, the volume value for the second speaker
(4) is changed to the volume value according to the reception level currently set, and for the first
speaker (24), The equalizer value will be changed to the equalizer value for the second speaker
(4).
[0029]
When the casing is opened from the closed state during a call, the processing of steps S10 to S14
is switched to the processing of steps S5 to S9, and the operation speaker is switched from the
second speaker (4) to the first speaker (24). While being switched, the volume value for the first
speaker (24) is changed to the volume value according to the reception level currently set based
on the table, and the equalizer for the second speaker (4) is changed. The value will be changed
to the equalizer value for the first speaker (24). Thereafter, when there is an on-hook operation
and it is determined as YES in step S15, the process proceeds to step S16, and the
communication operation is ended.
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[0030]
In the foldable mobile phone according to the present invention described above, when the
operation speaker is switched from the first speaker (24) to the second speaker (4), the volume
value set for the first speaker (24) is shown in FIG. As shown in FIG. 6, the volume value of the
second speaker (4) that can obtain the same acoustic effect is changed, and a suitable equalizer
frequency characteristic is set for the second speaker (4) shown in FIG. Therefore, the reception
sound is easy to hear and a comfortable call can be realized.
[0031]
Also, when the operation speaker is switched from the second speaker (4) to the first speaker
(24), the volume value set for the second speaker (4) is the same as shown in FIG. Since the
volume value of the first speaker (24) to be obtained is changed and the equalizer frequency
characteristic suitable for the first speaker (24) shown in FIG. 7 is set, the received sound is easy
to hear It becomes a thing and a comfortable call is realized.
[0032]
Furthermore, in the foldable mobile phone according to the present invention, in the case where
the reception level of the second speaker (4) is adjusted by operating the side key (15) with both
cabinets (1) and (2) closed, Among the nine reception level setting values shown in FIG. 6, three
volume setting values corresponding to three reception level setting values 9, 5 and 1 can be
selected from -6 dB, -12 dB and -16 dB. Since the change in the reception level by one operation
of the side key (15) is large, the user can clearly recognize that the reception level changes by the
operation of the side key (15). It can.
[0033]
The configuration of each part of the present invention is not limited to the above embodiment,
and various modifications can be made within the technical scope described in the claims.
For example, the sensitivity of the microphone (13) is not limited to the configuration that keeps
constant regardless of the opening and closing of the casing, but it is also possible to adopt a
configuration that increases by closing the casing from the open state.
[0034]
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It is a perspective view which shows the state which folded up the foldable mobile telephone
which concerns on this invention.
It is a top view which shows a state same as the above.
It is a perspective view which shows the state which open | released this foldable mobile
telephone. It is a block diagram which shows the electric constitution of this foldable mobile
telephone. It is a flowchart showing the procedure of the switching control of a 1st speaker and a
2nd speaker. It is a graph which shows the correspondence of the volume setting value about a
1st speaker and a 2nd speaker. It is a graph which shows the equalizer frequency characteristic
about the 1st speaker. It is a graph which shows the equalizer frequency characteristic about the
2nd speaker.
Explanation of sign
[0035]
(1) Operation side cabinet (11) Operation key (12) Transmitter (13) Microphone (15) Side key (2)
Display side cabinet (21) Main display (22) Earpiece (23) Sub display (24) First speaker (4)
Second speaker
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