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DESCRIPTION JP2012138770

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DESCRIPTION JP2012138770
The present invention provides a mobile phone and a piezoelectric element control device having
an easy-to-use function. A cartilage conduction vibration source, and a vibration conductor whose
central portion abuts on it and whose ends for tragus contact contact both ends of the mobile
phone upper ear side both project from the outer wall of the mobile phone Do not When the
gravitational acceleration detection unit detects the horizontal stationary state of the mobile
phone at the time of desktop mounting, etc., even if the proximity sensor for ear detection detects
false recognition of a desk or the like, the vibration of the cartilage conduction vibration source is
prohibited. By adjusting the sound quality of the voice information input from the voice input
unit and inverting the phase, and causing the cartilage conduction vibration unit to output when
the ear hole is closed by pressing the tragus, the vocal cord from the earplug bone conduction
effect occurs Relieve the discomfort of your voice by bone guidance. A cartilage conduction
vibration unit is configured using a piezoelectric element, and a pressure change detected by the
piezoelectric element detects a state in which the ear canal is blocked by pressing of a tragus.
[Selected figure] Figure 7
Mobile phone and piezoelectric element control device
[0001]
The present invention relates to a mobile phone and a piezoelectric element control device.
[0002]
Conventionally, various mobile phones have been proposed for various purposes.
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For example, in order to provide a mobile phone that can be clearly heard even under high noise,
a bone conduction speaker is adopted, and a mobile phone equipped with this bone conduction
speaker and an ear canal occlusion means has been proposed. (Patent Document 1) On the other
hand, as a method of using a bone conduction speaker, by manually adjusting the pressure at
which the vibrating surface to be in contact with the tragus is in contact with the tragus, cartilage
conduction is adjusted according to the magnitude of external noise. It has also been proposed to
change the transmission ratio of voice information via air and air information via air conduction.
Further, it has been proposed to use a piezoelectric element as a bone conduction vibration
source.
[0003]
JP, 2003-348208, A Patent 4541111
[0004]
However, the functions of mobile phones and voice output devices have many more issues to be
considered.
[0005]
In view of the above, it is an object of the present invention to provide a portable telephone and a
piezoelectric element control device having an easy-to-use function.
[0006]
In order to achieve the above object, the present invention provides a mobile phone having a
cartilage conduction vibration unit including a cartilage conduction vibration source and a
vibration conductor for guiding the vibration of the cartilage conduction vibration source to the
upper part of the mobile phone in contact with the ear cartilage. Do.
As a result, it is possible to provide a mobile phone that can be used with a feeling of use close to
that of a normal call state, utilizing the good voice information transmission capability of ear
cartilage and without the discomfort of pressing and inserting an ear.
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Furthermore, according to the configuration of the cartilage transmission vibration unit as
described above, the vibration of the cartilage conduction vibration source can be guided to a
desired position by the vibration conductor, and the freedom of the layout of the cartilage
conduction vibration source itself is also increased. It is useful for mounting a cartilage
conduction vibration unit on a spare cell phone.
[0007]
According to a specific feature of the invention, the cartilage conduction vibration source and the
vibration conductor are configured not to protrude from the outer wall of the mobile phone.
By this, it is possible to realize a shape that does not impair the function and the appearance of
the mobile phone without the protrusion having a sense of incongruity due to the arrangement of
the cartilage conduction vibration unit. According to a more specific feature, the vibration
conductor end is located at the ear upper corner of the mobile phone. Thereby, a natural
abutment on the ear cartilage can be achieved, and the arrangement of the cartilage conduction
vibration unit not protruding from the outer wall of the mobile phone can be realized. According
to a more specific feature, the vibration conductor end is disposed at the lower angle of the use
posture in the ear-side upper corner of the mobile phone. In this way, the cartilage conduction
vibration unit can be brought into contact with the ear cartilage in a state where there is no sense
of incongruity either for the caller himself or for the other person by the posture close to the
normal communication state where the mobile phone is hand-held and hand-held. This posture is
suitable for contact with the tragus, and the tragus is particularly suitable because it has a high
cartilage conduction effect.
[0008]
According to another particular feature of the invention, both ends of the vibrating conductor
end are located at both corners of the upper ear side of the mobile phone. This configuration is
suitable for enhancing the contact effect with ear cartilage. For example, both ends of the
vibration conductor end can be appropriately brought into contact with the ear cartilage
depending on whether the right ear or the left ear is used, and the left and right hand-held
change of the mobile phone can be easily handled. Can.
[0009]
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According to another feature of the present invention, when the cartilage conduction vibration
unit in contact with the ear cartilage, the gravitational acceleration detection unit, and the
gravitational acceleration detection unit detect the stationary state of the mobile phone, the
vibration of the cartilage conduction vibration unit is inhibited. A mobile phone having a control
unit is provided. Thus, for example, when the cellular phone is placed on a desk or the like with
the cartilage conduction vibration unit on the lower side, the cartilage conduction unit can be
prevented from vibrating carelessly to emit an unpleasant sound.
[0010]
According to the specific feature of the present invention, the mobile phone has a sensor for
detecting the presence or absence of an object close to the cartilage conduction vibration unit,
and the control unit responds to the detection of the proximity object by the sensor. When the
gravitational acceleration detection unit detects the stationary state of the mobile phone, the
vibration of the cartilage conduction vibration unit is prohibited regardless of the detection of the
close object by the sensor. A sensor that detects the presence or absence of a close object has a
useful configuration for vibrating the cartilage conduction vibration unit by detecting that the
mobile phone is applied to the ear. For example, the mobile phone is placed on a desk or the like.
When it is worn, it may be mistaken for contact with the ear to vibrate the cartilage conduction
vibration unit. Here, the above-mentioned specific feature can prevent generation of an
unpleasant sound due to the vibration of the cartilage conduction unit based on such
misidentification.
[0011]
According to another feature of the present invention, the cartilage conduction vibration unit in
contact with the ear cartilage, the voice input unit, the phase reversing unit for reversing the
phase of the voice information input from the voice input unit, and the phase reversing unit
There is provided a mobile phone having a control unit for outputting the voice information thus
generated from the vibration conducting unit. By this, it is possible to appropriately control the
discomfort based on one's own voice in the conversation by the mobile phone in a state where
the cartilage conduction vibration unit is in contact with the ear cartilage.
[0012]
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According to the specific feature of the present invention, the mobile phone has the sound
quality adjustment unit, and the control unit controls the sound quality of the voice information
adjusted by the sound quality adjustment unit and phase inverted by the phase inversion unit
from the vibration conduction unit Output. This makes it possible to more appropriately control
the sense of incongruity based on one's voice in the conversation by the mobile phone.
[0013]
According to the other specific feature of the present invention, the mobile phone has the contact
state detection unit which detects the contact state of the cartilage conduction vibration unit to
the ear cartilage, and the control unit detects the contact state. Depending on the detection state
of the unit, it is determined whether or not the voice information phase-inverted by the phase
inversion unit is to be output from the vibration conducting unit. By this, it is possible to control
the discomfort based on the user's voice more appropriately according to the contact state of the
mobile phone with the ear cartilage.
[0014]
According to a more specific feature, in the contact state detection unit, the cartilage conduction
vibration unit contacts the ear cartilage in a state in which the ear hole is blocked by the contact
of the mobile phone with the ear cartilage and the earplug bone conduction effect is generated.
The control unit detects that it is in contact, and the control unit causes the phase inversion unit
to reverse the phase of the voice information according to the detection that the cartilage
conduction vibration unit is in contact with the ear cartilage in a state in which the earplug bone
conduction effect occurs. Is output from the vibration conduction unit. The earplug bone
conduction effect produced by closing the ear canal realizes an instant reception situation in
which the sound information from the vibration conduction unit is transmitted with louder noise
and the environmental noise is shut off. However, on the other hand, the earplug bone
conduction effect involves the discomfort of one's own voice due to the bone conduction from
the vocal cords. The above features are useful for alleviating such discomfort in one's own voice.
[0015]
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According to another feature of the present invention, there is provided a conductive vibration
portion including a piezoelectric element and transmitting vibration of the piezoelectric element
by coming into contact with a conductor, a signal output portion outputting conductive vibration
information to the piezoelectric element, and conductive vibration. There is provided a
piezoelectric element control device including: a pressure detection unit that detects a change in
contact pressure of a conductor to the unit by the piezoelectric element. With such a
configuration, the piezoelectric element can be used as an output element of contact vibration
and a contact pressure sensor, and a conductive vibration output can be made according to
various situations. Such a piezoelectric element control device is configured as a mobile phone in
which the conductive body is the ear cartilage, and is suitable for detecting the contact state of
the cartilage conduction vibration unit with the ear cartilage by the pressure change sensed by
the piezoelectric element is there.
[0016]
As described above, according to the present invention, it is possible to provide an input / output
combined type piezoelectric element control device suitable for useful cellular phones, cellular
phones and the like utilizing cartilage conduction.
[0017]
It is a perspective view which shows Example 1 of the mobile telephone which concerns on
embodiment of this invention.
(Example 1) It is a side view of the mobile phone 1 showing the functions of the right ear use
state and the left ear use state. FIG. 1 is a block diagram of a first embodiment. It is a flowchart of
operation | movement of the control part in Example 1 of FIG. It is a perspective view which
shows Example 2 of the mobile telephone which concerns on embodiment of this invention.
(Embodiment 2) FIG. 6 is a perspective view showing Embodiment 3 of the mobile phone
according to the embodiment of the present invention. (Example 3) FIG. 10 is a perspective view
showing Example 4 of the mobile phone according to the embodiment of the present invention.
(Embodiment 4) FIG. 14 is a block diagram of Embodiment 4. FIG. 18 is a main part conceptual
block diagram showing a configuration related to the earplug bone conduction effect of Example
4. It is a flowchart of operation | movement of the control part in Example 4 of FIG.
[0018]
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FIG. 1 is a perspective view showing Example 1 of a mobile phone according to an embodiment
of the present invention. In FIG. 1, the mobile phone 1 comprises an upper portion 7 having a
display portion 5 and the like, an operation portion 9 such as a ten key, and a lower portion 11
having a voice transmitting portion 23 such as a microphone for sound produced from the
operator's mouth. , The upper part 7 is configured to be foldable on the lower part 11 by the
hinge part 3. The upper part 7 is provided with a receiver 13 such as an earphone for
transmitting voice to the operator's ear, and constitutes a telephone function together with the
transmitter 23 of the lower part 11. Further, in the upper part 7, when the mobile phone 1 is
used as a videophone, the face of the operator looking at the display unit 5 can be photographed,
and the inner camera 17 used also for taking a picture is arranged It is done. Furthermore, in the
upper part 7, infrared reflected light from the pair of infrared light emitting parts 19 and 20 and
the ear that constitute a proximity sensor for detecting that the mobile phone 1 is in contact with
the ear for a call A common infrared light proximity sensor 21 for receiving light is provided.
Although not shown in FIG. 1, a rear surface camera is provided on the rear surface of the upper
portion 7 so that a subject to be monitored by the display unit 5 can be photographed on the
rear surface side of the mobile phone 1.
[0019]
The upper portion 7 is further provided with a vibrating portion 24 for the right ear and a
vibrating portion 26 for the left ear, which are made of a piezoelectric bimorph element or the
like for contacting the tragus, at an upper (inner side) corner. Although the right ear vibration
unit 24 and the left ear vibration unit 26 are configured not to protrude from the outer wall of
the mobile phone so as not to damage the design, they are effectively provided in the tragus by
being provided at the corners of the outer wall of the mobile phone. Contact. As a result, in
addition to the reception by voice from the receiver 13, reception can be performed by bone
conduction from the cartilage of the tragus. In addition, as disclosed in the above-mentioned
Patent Document 2, the tragus is pressed while being able to obtain the largest auditory
sensation in the configuration of the ear cartilage such as the ear mastoid, the posterior cartilage
surface of the external ear opening, the tragus and the chaff It is known that the rise in bass
when pressure is increased is greater than at other positions. Since this knowledge is described in
detail in Patent Document 2, it can be referred to.
[0020]
When the mobile phone 1 is put on the right ear, it turns slightly clockwise in FIG. 1 and falls to
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the right in FIG. Then, by providing the right-ear vibration unit 24 at the inclined lower side
corner of such a mobile-phone ear-side upper end, the right-ear vibration unit 24 naturally
becomes a right ear without causing the vibration unit to protrude from the mobile phone outer
wall. It can be in contact with the beads. This state is a posture close to a normal call state, and
there is no sense of incongruity between the caller and the person on the side. Since the
receiving unit 13 is in the vicinity of the right ear vibration unit 24, both voice information via
tragus cartilage and voice information via the ear canal are transmitted to the ear. At this time,
since the same voice information is transmitted by different sounding pairs and routes, phase
adjustment between the two is performed so as not to cancel each other.
[0021]
On the other hand, when the mobile phone 1 is placed on the left ear, the mobile phone 1 slightly
rotates in the counterclockwise direction in FIG. Then, similarly to the case of the right ear, the
left ear vibration unit 26 is provided at the inclined lower side corner of the mobile phone ear
side upper end, and the left ear vibration unit 26 naturally becomes the tragus of the left ear. Can
be in contact with Since this state is a posture close to a normal talking state, and since the
receiving unit 13 is in the vicinity of the left ear vibration unit 26 and both voice information via
trabecular cartilage and voice information via the ear canal are transmitted to the ear, The phase
adjustment between the two is performed as in the case of the right ear.
[0022]
Since the pair of infrared light emitting portions 19 and 20 in the proximity sensor emit light
alternately in time division, the common infrared light proximity sensor 21 reflects the reflected
light by infrared light from any of the light emitting portions. It is possible to discriminate
whether light is received, and it is possible to judge which of the right ear vibration unit 24 and
the left ear vibration unit 26 is in contact with the tragus. By this, it can be determined which ear
the mobile phone is being used, and it is possible to vibrate the vibrating portion of the one in
contact with the tragus to turn off the other. However, since there is variation in how to put the
ear of the mobile phone 1 on the ear and the difference in the shape of the ear, in Example 1, the
acceleration sensor is built in as described later, and the gravity acceleration detected by this
acceleration sensor Thus, it is configured to detect to which side the mobile phone 1 is inclined,
and to vibrate the vibrating portion at the lower side angle of the inclination so as to turn off the
other. The use of the right ear and the use of the left ear described above will be described again
with reference to the respective specification states.
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[0023]
Environmental noise that is further disposed on the upper part 7 on the outside (back side not
hitting the ear) so as to pick up environmental noise, and means for preventing conduction of the
vibration for the right ear and the left ear. A microphone 38 is provided. The environmental noise
microphone 38 further picks up the sound produced from the operator's mouth. Environmental
noise picked up by the environmental noise microphone 38 and the operator's own voice are
reversed in phase, mixed with the right ear vibration unit 24 and the left ear vibration unit 26,
and the environment included in the voice information via the receiver unit 13 Cancel the noise
and the operator's own voice to make it easy to hear the other party's voice information. Details
of this function will be described later.
[0024]
FIG. 2 is a side view of the mobile phone 1 showing the functions of the right ear vibrating unit
24 and the left ear vibrating unit 26. FIG. 2 (A) shows the right hand holding the mobile phone 1
in the right hand Show the status. On the other hand, FIG. 2 (B) shows a state in which the mobile
phone 1 is held in the left hand and applied to the left ear 30. 2 (A) is a view from the right side
of the face, and FIG. 2 (B) is a view from the left side of the face, so the mobile phone 1 is on the
back side (the back side of FIG. 1). Is visible. In order to illustrate the relationship between the
mobile phone 1 and the right ear 28 and the left ear 30, the mobile phone 1 is indicated by an
alternate long and short dash line.
[0025]
As shown in FIG. 2 (A), when the mobile phone 1 is put on the right ear, it is slightly inclined in
the counterclockwise direction (the relationship between FIG. 1 and front and back) in FIG. . And
since the ear vibration unit 24 is provided at such a slanted lower side corner of the upper end
on the side of the mobile phone, it can be brought into contact with the tragus 32 of the right ear
naturally. As described above, this state is a posture close to that of a normal call state, and there
is no sense of incongruity either for the caller or for the side. On the other hand, as shown in FIG.
2 (B), when the mobile phone 1 is put on the left ear, it is slightly inclined clockwise in FIG. 2
(relationship between FIG. 1 and front and back) and in FIG. Become. Then, since the ear
vibration unit 26 is provided at the inclined lower side angle of the upper end on the side of the
mobile phone, it can be brought into contact with the tragus 34 of the left ear naturally. Also in
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this state, as in the case of the right ear, the posture is similar to that of the normal
communication state, and there is no sense of incongruity to either the caller or the side.
[0026]
FIG. 3 is a block diagram of the first embodiment. The same reference numerals as in FIG. 1
denote the same parts, and a description thereof will be omitted unless necessary. The mobile
phone 1 is controlled by a control unit 39 operating according to a program stored in the storage
unit 37. The storage unit 37 can also temporarily store data necessary for control of the control
unit 39, and can store various measurement data and images. The display of the display unit 5 is
performed based on the display data held by the display driver 41 based on the control of the
control unit 39. The display unit 5 has a display backlight 43, and a control 39 adjusts the
brightness based on the surrounding brightness.
[0027]
The telephone function unit 45 including the receiver 13 and the transmitter 23 can be
connected to a wireless telephone line by the telephone communication unit 47 under the
control of the control unit 39. Under the control of the control unit 39, the speaker 51 performs
a ringing tone and various types of guidance, and outputs the other party's voice at the time of a
videophone call. The audio output of the speaker 51 is not output from the right ear cartilage
transmission vibration unit 24 and the left ear cartilage transmission vibration unit 26. This is
because in the case of videophone, there is no possibility that the cartilage conduction vibration
unit may hit the ear. The image processing unit 53 is also controlled by the control unit 39 to
process an image captured by the videophone inner camera 17 and the rear main camera 55,
and inputs an image of the processing result to the storage unit 37.
[0028]
As described above, the pair of infrared light emitting units 19 and 20 in the proximity sensor
emit light alternately in time division based on the control of the control unit 39. Therefore, the
infrared reflected light input to the control unit 39 by the common infrared light proximity
sensor 21 can be identified as the reflected light by the infrared light from any light emitting
unit. When the reflected light is detected from both of the infrared light emitting parts 19 and
20, the control part 39 compares them with each other, and either the right ear vibrating part 24
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or the left ear vibrating part 26 is in contact with the tragus To determine the Furthermore, the
acceleration sensor 49 detects the direction of the detected gravitational acceleration. Based on
the detection signal, the control unit 39 determines which of the states shown in FIG. 2 (A) and
FIG. 2 (B) the mobile phone 1 is inclined, and as described in FIG. A certain vibration part is
vibrated and the other is turned off.
[0029]
The mobile phone 1 further has a phase adjustment mixer unit 36 for performing phase
adjustment on the audio information from the control unit 39 and transmitting the phase
adjustment to the right ear vibration unit 24 and the left ear vibration unit 26. More specifically,
the phase adjustment unit 36 generates voice information generated from the receiving unit 13
and transmitted from the ear canal via the tympanic membrane and generated from the right ear
vibration unit 24 or the left ear vibration unit 26 via tragus cartilage The phase adjustment is
performed on the voice information from the control unit 39 on the basis of the voice
information transmitted from the control unit 39 to the receiver unit 13 so that the same voice
information transmitted in the above does not cancel each other, and the right ear vibration unit
24 and the vibration unit 26 for the left ear. Since this phase adjustment is relative adjustment
between the earpiece 13 and the right ear vibration unit 24 and the left ear vibration unit 26, the
control unit 39 transmits the phase adjustment to the right ear vibration unit 24 and the left ear
vibration unit 26. The phase of the audio information transmitted from the controller 39 to the
receiver 13 may be adjusted based on the transmitted audio information. In this case, the audio
information to the speaker 51 is also adjusted in the same phase as the audio information to the
receiver 13.
[0030]
In addition, the phase adjustment mixer unit 36 prevents the voice information from the
receiving unit 13 as described above and the same voice information from the right ear vibration
unit 24 or the left ear vibration unit 26 from canceling each other. And the second function in
cooperation with the environmental noise microphone 38. In this second function, the
environmental noise picked up by the environmental noise microphone 38 and the voice of the
operator are phase-reversed by the phase adjustment mixer unit 36, and then the voice
information of the right ear vibration unit 24 or the left ear vibration unit 26. Thus, the
environmental noise and the voice of the operator himself contained in the voice information via
the receiver 13 are canceled to make it easy to hear the voice information of the other party. At
this time, the environmental noise and the voice of the operator are effectively effective
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regardless of the difference in the transmission route of the voice information from the receiver
13 and the voice information from the right ear vibration unit 24 or the left ear vibration unit 26.
Mixing is performed in consideration of the phase adjustment based on the first function so as to
be canceled.
[0031]
FIG. 4 is a flowchart of the operation of the control unit 39 in the first embodiment of FIG. The
flow in FIG. 4 mainly illustrates the functions related to the functions of the right ear vibration
unit 24 and the left ear vibration unit 26, so that the operation is extracted and illustrated, and a
general mobile phone The operation of the control unit 39 not shown in the flow of FIG. The flow
in FIG. 4 starts with the main power on by the operation unit 9 of the mobile phone 1, performs
initial start-up and function check of each unit in step S 2, and starts screen display on the
display unit 5. Next, in step S4, the functions of the right ear vibration unit 24 and the left ear
vibration unit 26 are turned off, and the process proceeds to step S6. In step S, it is checked
whether there are operations such as mail operation, Internet operation, other settings and
downloaded games that do not use radio waves (hereinafter collectively referred to as "non-call
operation"). Then, if these operations are performed, the process proceeds to step S8 to execute
non-call processing, and the process proceeds to step S10. In the non-call operation, the function
of the receiver 13, the right ear vibration unit 24 and the left ear vibration unit 26 in the upper
part 7 of the mobile phone 1 is not assumed to be performed. On the other hand, when a non-call
operation is not detected in step S6, the process directly proceeds to step S10.
[0032]
In step S10, it is checked whether a call by mobile radio waves is being received. If the incoming
call is not in progress, the process proceeds to step S12, and it is checked whether the response
from the other party to the call origination from the mobile phone 1 is correct. And if a response
is detected, it will progress to step S14. On the other hand, when it is detected in step S10 that a
call by mobile radio waves is being received, the process proceeds to step S16 to determine
whether the mobile phone is open, that is, the upper part 7 is folded over the lower part 11
Check whether it is in the opened state as shown in FIG. Then, if it is not detected that the mobile
phone is open, the process returns to step S10, and thereafter, steps S10 and S16 are repeated to
wait for the mobile phone to be opened. If the incoming call ends with this repetition without the
mobile phone being opened, the flow moves from step S10 to step S12. On the other hand, when
it is detected in step S16 that the mobile phone is open, the process proceeds to step S14. In step
S14, the transmitting unit 23 and the receiving unit 13 are turned on, and the process proceeds
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to step S18. In step S18, it is checked whether the call is a videophone call, and if it is not a
videophone call, the process goes to step S20 to check whether the call is disconnected at this
time and goes to step S22 if the call is not disconnected.
[0033]
In step S22, it is checked whether the infrared light proximity sensor 21 detects contact of the
ear. If contact is detected, the process proceeds to step S24. On the other hand, when the
infrared light proximity sensor 21 does not detect the ear contact in step S22, the process
returns to step S14, and steps S14 and steps S18 to S22 are repeated to wait for the proximity
sensor detection in step S22. In step S24, based on the detection signal of the acceleration sensor
49, it is checked whether or not the inclination of the right ear call state as shown in FIG. And if it
corresponds, it will progress to step S26, will turn on the cartilage conduction vibration part 24
for right ears, and will transfer to step S28. On the other hand, if it is not possible to detect that
the right ear call state tilt has occurred in step S24, the detection signal of the acceleration
sensor 49 detects the left ear call state tilt as shown in FIG. 2 (B). In step S30, the left ear
cartilage conduction vibration unit 26 is turned on, and the process proceeds to step S28.
[0034]
In the description of the flow in FIG. 4 above, the process proceeds to step S24 regardless of
whether the infrared reflected light detected by the infrared light proximity sensor 21 is from the
infrared light emitting unit 19 or 20, and in step S24 the acceleration sensor It has been
described that it is detected whether the right ear call state tilt is performed by the 49 signals.
However, since it is possible to detect whether the right ear call state tilt is also achieved by the
infrared light proximity sensor 21, in place of the signal of the acceleration sensor 49 in step S
24, the infrared light at the light emission timing of the infrared light emitting unit 19 If the
output of the proximity sensor 21 is larger than that at the light emission timing of the infrared
light emitting unit 20, it may be determined that the right ear call state tilt. Further, in step S24,
it is determined whether the right ear call state inclination is integrated by combining the signal
of the acceleration sensor and the output comparison result of the infrared light proximity sensor
21 at the light emission timing of the infrared light emitting portions 19 and 20. It may be
configured to
[0035]
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In step S28, it is checked whether or not the call state is disconnected. If the call is not
disconnected, the process returns to step S24, and steps S24 to S30 are repeated until a call
disconnection is detected in step S28. This corresponds to the change of the cellular phone
between the right ear call state and the left ear call state during the call. On the other hand, when
a call disconnection is detected in step S28, the process proceeds to step S32, and the right ear
cartilage conduction vibration unit 24 or the left ear cartilage conduction vibration unit 26 and
the reception unit 13 and the transmission unit 23 are turned off. Then, the process proceeds to
step S34. On the other hand, when the call origination response is not detected in step S12, the
process immediately proceeds to step S34. When it is detected in step S18 that the telephone is a
videophone call, the process proceeds to the videophone processing in step S36. In the
videophone process, an image of the user's own face by the videophone inner camera 17, an
output of the other party's voice by the speaker 51, a sensitivity switching of the transmitter 23,
a display of the other party's face on the display 5, etc. are performed. When such videophone
processing is completed, the process proceeds to step S38, the speaker 51, the receiver 13, and
the transmitter 23 are turned off, and the process proceeds to step S34. Also, when a call
disconnection is detected in step S20, the process proceeds to step S38, but at this time, since the
speaker 51 is not originally turned on, the reception unit 13 and the transmission unit 23 are
turned off, and the process proceeds to step S34.
[0036]
In step S34, the presence or absence of the main power off operation is checked, and if there is
an off operation, the flow is ended. On the other hand, when the main power off operation is not
detected in step S34, the flow returns to step S6, and steps S6 to S38 are repeated. As described
above, the right ear cartilage conduction vibration unit 24 or the left ear cartilage conduction
vibration unit 26 is in the call state even when the mobile phone 1 is not in the call state when
the mobile phone 1 is not opened. It does not turn on in the case of a videophone call, and also in
the normal call state, when the mobile phone 1 is not in the ear. However, when the right ear
cartilage conduction vibration unit 24 or the left ear cartilage conduction vibration unit 26 is
once turned on, the on / off switching with the right ear cartilage conduction vibration unit 24 or
the left ear cartilage conduction vibration unit 26 is performed. This is never turned off unless a
dropped call is detected.
[0037]
FIG. 5 is a perspective view showing Example 2 of the mobile phone according to the
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embodiment of the present invention. Since the gist of the invention is common to the second
embodiment, the corresponding parts are assigned the same reference numerals as in the first
embodiment and the description will be omitted. The mobile phone 101 according to the second
embodiment is not a folding method in which the upper and lower parts are separated but an
integral type without a movable part. Therefore, "upper part" in this case does not mean the
separated upper part, but means the upper part of the integral structure.
[0038]
In the first embodiment, when the mobile phone 1 is folded, the right ear cartilage conduction
vibration unit 24 and the left ear cartilage conduction vibration unit 26 are sandwiched between
the upper portion 7 and the lower portion 11 and stored. In contrast, in the second embodiment,
the right ear cartilage conduction vibration unit 24 and the left ear cartilage conduction vibration
unit 26 are always exposed to the outer wall of the mobile phone 101. Also in the second
embodiment, the internal structure of FIG. 3 and the flowchart of FIG. 4 can basically be diverted.
However, relating to the difference in the above structure, step S16 of the flowchart of FIG. 4 is
omitted, and when it is confirmed in step S10 that a call is being received, the process directly
proceeds to step S14.
[0039]
FIG. 6 is a perspective view showing Example 3 of the mobile phone according to the
embodiment of the present invention. Since the gist of the invention is common to the third
embodiment, the corresponding parts are assigned the same reference numerals as the first
embodiment, and the description will be omitted. The mobile phone 201 according to the third
embodiment has a structure in which the upper portion 107 can slide relative to the lower
portion 111. In the structure of the third embodiment, when the upper portion 107 is overlapped
with the lower portion 111, there is no vertical relation, but the “upper” in the third
embodiment means a portion coming up when the mobile phone 201 is stretched. Do.
[0040]
In the third embodiment, when the upper portion 107 is extended to expose the operation unit 9
as shown in FIG. 6, full function is available, and the upper portion 107 is overlapped with the
lower portion 111 so that the operation unit 9 is hidden. However, basic functions such as
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incoming call response and calls are available. In the third embodiment, the cartilage conduction
vibration unit 24 for the right ear and the cartilage conduction vibration unit 26 for the left ear
both in the state in which the portable telephone 201 is extended as shown in FIG. It is always
exposed to the outer wall of the mobile phone 201. Also in the third embodiment, the internal
structure of FIG. 3 and the flowchart of FIG. 4 can basically be diverted. However, as described
above, in the third embodiment, since the call is possible even in the state where the upper part
107 is overlapped with the lower part 111, step S16 of the flowchart of FIG. 4 is omitted as in
the second embodiment. If it is confirmed that an incoming call is in progress, the process
proceeds directly to step S14.
[0041]
The implementation of the above-mentioned various features of the present invention is not
limited to the above-described embodiment, and can be implemented in other embodiments. For
example, in the above embodiment, the right ear cartilage conduction vibration unit 24 and the
left ear cartilage conduction vibration unit 26 are provided to cope with both the right ear use
and the left ear use due to changing hands or changing the user. However, when it is assumed
that only the right ear or the left ear is used for cartilage conduction, the cartilage conduction
vibration portion may be one.
[0042]
The right ear cartilage conduction vibration unit 24 and the left ear cartilage conduction
vibration unit 26 are originally provided on the premise that they abut on the tragus of the right
ear and the left ear, respectively. As shown, since cartilage conduction is also possible in other
ear cartilage configurations than the tragus, such as the ear mastoid and the posterior ear
cartilage surface, both the cartilage conduction vibration unit 24 for the right ear and the
cartilage conduction vibration unit 26 for the left ear For example, when using the right ear,
appropriate portions of the right ear cartilage may be simultaneously pressed and used. In this
sense, the two cartilage conduction vibration units 24 and 26 are not necessarily limited to those
for the right ear and the left ear. In this case, instead of turning on only one of the two cartilage
conduction vibration units 24 and 26 as in the embodiment, both are turned on simultaneously.
[0043]
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Furthermore, in the above embodiment, the receiving part 13 and the cartilage conduction
vibration part 24 for the right ear or the cartilage conduction vibration part 26 for the left ear
are simultaneously turned on, but for the cartilage conduction vibration part 24 for the right ear
or the left ear When the cartilage conduction vibration unit 26 is turned on, the reception unit 13
may be turned off. In this case, phase adjustment of audio information is unnecessary.
[0044]
FIG. 7 is a perspective view showing Example 4 of the mobile phone according to the
embodiment of the present invention. Since the gist of the invention is common to the fourth
embodiment, the corresponding parts are assigned the same reference numerals as the first
embodiment, and the description will be omitted. The mobile phone 301 according to the fourth
embodiment is not a folding method in which the upper part and the lower part are separated in
the same manner as the second embodiment, but is an integral type without a movable part.
Moreover, it is comprised as what is called a smart phone which has the big screen 205 provided
with GUI (graphical user interface) function. Also in Example 4, the "upper part" does not mean
the separated upper part, but means the upper part of the integral structure. In the fourth
embodiment, the operation unit 9 such as a ten key is displayed on the large screen 205, and the
GUI operation is performed according to the touch or slide of the finger on the large screen 205.
[0045]
The cartilage conduction vibration function in the fourth embodiment is borne by a cartilage
conduction vibration unit having a cartilage conduction vibration source 225 composed of a
piezoelectric bimorph element or the like and a vibration conductor 227. The cartilage
conduction vibration source 225 is disposed in contact with the lower portion of the vibration
conductor 227 and transmits the vibration to the vibration conductor 227. The cartilage
conduction vibration source 225 is configured to project from the outer wall of the mobile phone
(front in FIG. 7) in the same manner as in the first to third embodiments so as not to damage the
design. Transmitted laterally, causing both ends 224 and 226 to vibrate. Since both ends 224
and 226 of the vibration conductor 227 are located at the inner corner of the upper part 7 of the
mobile phone 301 in contact with the tragus, the ear is effectively eared without protruding from
the outer wall of the mobile phone as in the first to third embodiments. Contact the beads. Thus,
the right end portion 224 and the left end portion 226 of the vibration conductor 227
respectively constitute the right ear vibration unit 24 and the left ear vibration unit 26 described
in the first embodiment. Since the vibration conductor 227 vibrates not only at the right end 224
and the left end 226 but in the whole, in the fourth embodiment, even if the inner upper end side
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of the mobile phone 301 is brought into contact with the ear cartilage Voice information can be
transmitted. Such a configuration of the cartilage conduction vibration unit allows the vibration
of the cartilage conduction vibration source 225 to be guided to a desired position by the
vibration conductor 227 and there is no need to arrange the cartilage conduction vibration
source 225 itself on the outer wall of the mobile phone 301. It is useful for mounting the
cartilage conduction vibration unit in a mobile phone which can be laid out freely and has ample
space.
[0046]
In the fourth embodiment, two more functions are added. However, these functions are not
specific to the fourth embodiment, and are also applicable to the first to third embodiments. One
of the additional functions is to prevent a malfunction of the cartilage transmission vibration unit.
In any of the first to fourth embodiments, the infrared light emitting units 19 and 20 and the
infrared light proximity sensor 21 detect that the mobile phone is in contact with the ear. When
the sensor is placed on a desk or the like with the inner side down, there is detection of the
proximity sensor, so it may be mistaken that the cellular phone is touched by the ear, and the
process may proceed from step S22 to step S24 in the flow of FIG. And since it does not
correspond to the right ear speech state inclination detected in step S24, the flow proceeds to
step S30, and there is a possibility that the left ear cartilage conduction vibration unit is
erroneously turned on. Since the vibrational energy of the cartilage conduction vibration unit is
relatively large, such malfunction may cause vibration noise with the desk. In the fourth
embodiment, in order to prevent this, the horizontal stationary state is detected by the
acceleration sensor 49, and if applicable, the vibration of the cartilage conduction vibration
source 225 is prohibited. Details of this point will be described later.
[0047]
Next, the second additional function in the fourth embodiment will be described. In each
embodiment of the present invention, the right ear vibration unit 24 or the left ear vibration unit
26 (in the fourth embodiment, the right end 224 or the left end 226 of the vibration conductor
227) is used as a tragus of the right ear or the left ear. By making contact, the voice information
is transmitted, but by increasing the contact pressure and closing the ear hole with the tragus,
the earplug bone conduction effect is produced, and the voice information can be transmitted by
louder sound. Furthermore, since environmental noise is blocked by closing the earhole with a
tragus, use in such a state realizes a unique reception situation that reduces unnecessary
environmental noise and increases necessary voice information, for example, a station. It is
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suitable for calls under noise. When the earplug bone conduction effect is produced, the voice by
the bone conduction from the vocal cords is increased, and the sense of balance between the left
and right sense of hearing is disturbed. In the fourth embodiment, the phase of the information
of the user's own voice picked up from the transmitter 23 is reversed and transmitted to the
vibration conductor 228 in order to alleviate such a sense of incongruity in the generation of the
earplug bone conduction effect. , Configured to cancel their own voice. The details of this point
will also be described later.
[0048]
FIG. 8 is a block diagram of the fourth embodiment, and the same reference numerals as in FIG. 7
denote the same parts. In addition, since there are many parts in common with the first to third
embodiments, the corresponding parts are denoted by the same reference numerals as those
parts. The description of the same or common parts will be omitted unless necessary. In the
fourth embodiment, the telephone function unit 45 is illustrated in some detail, but the
configuration is the same as in the first to third embodiments. Specifically, the reception
processing unit 212 and the microphone 213 in FIG. 8 correspond to the reception unit 13 in
FIG. 3, and the transmission processing unit 222 and the microphone 223 in FIG. 8 correspond
to the transmission unit in FIG. It corresponds to 23. On the other hand, the cartilage conduction
vibration source 225 and the vibration conductor 227 in FIG. 7 are collectively illustrated as a
cartilage conduction vibration unit 228 in FIG. The transmission processing unit 222 transmits
part of the operator's voice picked up from the microphone 223 to the reception processing unit
212 as a side tone, and the reception processing unit 212 uses the voice of the other party from
the telephone communication unit 47 as the operator himself. By superimposing the side tone
and outputting to the earphone 213, the balance between bone conduction and air conduction of
one's own voice in a state in which the mobile phone 301 is placed on the ear is brought close to
a natural state.
[0049]
The voice transmission processing unit 222 further outputs a part of the operator's voice picked
up from the microphone 223 to the sound quality adjustment unit 238. The sound quality
adjustment unit 238 makes the sound quality of the voice of the voice to be output from the
cartilage conduction vibration unit 228 and to be transmitted to the cochlea similar to the sound
quality of the operator's own voice transmitted to the cochlea by internal conduction from the
vocal cords when the earplug bone conduction effect occurs. Make adjustments and make both
cancellations effective. Then, the phase inversion unit 240 inverts the phase of the voice whose
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sound quality has been adjusted in this way, and outputs the phase-inverted voice to the phase
adjustment mixer unit 236. When the pressure detected by the pressure sensor 242 is
predetermined and the earhole is closed by the portable telephone 301 by a tragus, the phase
adjustment mixer 236 is instructed from the phase reverser 240 according to an instruction from
the controller 239. To drive the cartilage conduction vibration unit 228. By this, the excessive
one's own voice during earplug bone conduction effect generation is canceled, and a sense of
discomfort is alleviated. At this time, the degree of cancellation is adjusted so that the voices
corresponding to the side tones are left without being canceled. On the other hand, when the
pressure detected by the pressure sensor is low, the phase adjustment mixer unit is instructed by
the control unit 239 because the earhole is not blocked by the tragus and the earplug bone
conduction effect does not occur. Based on this, mixing of the own voice phase inversion output
from the phase inversion unit 240 is not performed. In FIG. 8, the positions of the sound quality
adjustment unit 238 and the phase inversion unit 240 may be reversed. Furthermore, the sound
quality adjustment unit 238 and the phase inversion unit 240 may be integrated as a function in
the phase adjustment mixer unit 236.
[0050]
FIG. 9 is a main part conceptual block diagram showing the state in which the mobile phone 301
is applied to the right tragus in Example 4, and illustrates the cancellation of one's own voice
during occurrence of the earplug bone conduction effect. is there. FIG. 9 also illustrates a specific
example of the pressure sensor 242, and is configured on the premise that the cartilage
conduction vibration unit 225 is a piezoelectric bimorph element. The same reference numerals
as in FIGS. 7 and 8 denote the same parts, and a description thereof will be omitted unless
necessary.
[0051]
FIG. 9A shows a state in which the mobile phone 301 is pressed against the tragus 32 to such an
extent that the tragus 32 does not block the earhole 232. In this state, the phase adjustment
mixer unit 236 drives the cartilage conduction vibration unit 225 based on the voice information
of the other party from the reception processing unit 212. The pressure sensor 242 monitors a
signal that appears on the signal line BR connecting the phase adjustment mixer unit 236 and the
cartilage conduction vibration unit 225, and the cartilage conduction vibration unit added
according to the pressure on the vibration conductor 227 It is configured to detect a signal
change based on distortion to the bimorph element 225. As described above, when the cartilage
conduction vibration unit 225 for transmitting voice information by contacting the tragus 32 is
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formed of a piezoelectric bimorph element, the piezoelectric bimorph element itself can also be
used as a pressure sensor for the tragus 32. The pressure sensor 242 further monitors a signal
appearing on a signal line connecting the phase adjustment mixer unit 236 and the reception
processing unit 212. The signal appearing here is not affected by the pressure on the tragus 32
and can be used as a reference signal for the pressure determination.
[0052]
As described above, in FIG. 9A, the tragus 32 does not block the earhole 232, and the pressure
determined by the pressure sensor force 242 is small. The phase adjustment mixer unit 236 is
instructed not to mix the phase inversion self voice from the above into the cartilage conduction
vibration unit 225. On the other hand, FIG. 9B shows a state in which the mobile phone 301
presses the tragus 32 more strongly in the direction of the arrow 302, and the tragus 32 blocks
the ear hole 232. And, in this state, the earplug bone conduction effect is generated. The pressure
sensor force 242 determines that the earhole is closed based on the detection of increase in
pressure above a predetermined level, and based on this determination, the control unit 239
causes the phase inversion self voice from the phase inversion unit 240 to be a cartilage
conduction vibration. The phase adjustment mixer unit 236 is instructed to mix in the unit 225.
As described above, the uncomfortable feeling of the player's own voice during the generation of
the earplug bone conduction effect is alleviated. On the other hand, when the pressure sensor
242 detects a decrease in the pressure more than a predetermined level from the state of FIG. 9B,
it is determined that the ear canal is not blocked as shown in FIG. , The mixing of the phase
reversal self voice is stopped. The pressure sensor 242 determines the state transition between
FIG. 9A and FIG. 9B based on the absolute amount of pressure and the change direction of
pressure. In a silent state in which both voices do not exist, the pressure sensor 242 detects
pressure by directly applying a pressure monitor signal that can not be heard by the ear to the
bone conduction vibration unit 225 directly.
[0053]
FIG. 10 is a flowchart of the operation of the control unit 239 in the fourth embodiment of FIG.
Since the flow of FIG. 10 has many parts in common with the flow of the first embodiment in FIG.
4, the same step numbers are given to the corresponding parts, and the description will be
omitted unless necessary. FIG. 10 also extracts and illustrates operations centering on related
functions in order to mainly explain the functions of the cartilage conduction vibration unit.
Therefore, as in the case of FIG. 4, there are also operations of the control unit 239 not described
in the flow of FIG. 10, such as general cellular phone functions. In FIG. 10, parts different from
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those in FIG. 4 are shown in bold, so these parts will be mainly described below.
[0054]
Step S42 is a summarization of steps S6 and S8 of FIG. 4 and is illustrated including the case of
going straight to the next step without the non-call operation in the non-call processing of step
S42. The contents are the same as step S6 and step S8 of FIG. Step S44 is a combination of steps
S10 and S12 of FIG. 4 and is a step of checking the presence or absence of a call state between
both parties regardless of whether it is an incoming call or a call from the other party. Although
illustrated, the content is the same as step S6 and step S8 of FIG. In the fourth embodiment, since
there is no configuration for opening and closing the mobile phone 301, the step corresponding
to step S16 in FIG. 4 is not included.
[0055]
Step S46 relates to the first additional function in the fourth embodiment, and checks whether
the mobile phone 301 is stationary in the horizontal state after leaving the hand-held state for a
predetermined time (for example, 0.5 seconds). When the proximity sensor is detected in step
S22, if it is confirmed in step S46 that such a horizontal stationary state is not established, the
process proceeds to step S48 and the cartilage conduction vibration source 225 is turned on. On
the other hand, when the horizontal stationary state is detected in step S46, the process proceeds
to step S50, the cartilage conduction vibration source 225 is turned off, and the process returns
to step S14. Step S50 corresponds to when the cartilage conduction vibration source is on and
step S46 is detected in the repetition of the flow to be described later, and the horizontal
conduction state is detected, and the step is performed with the cartilage conduction vibration
source off. When S50 is reached, the process returns to step S14 without doing anything.
[0056]
Step S52 relates to the second additional function in the fourth embodiment, and checks whether
or not the earplug bone conduction effect is generated by pressing the mobile phone 301
strongly against the tragus 32 to close the ear hole 232. It is. Specifically, as shown in FIG. 9, this
is checked based on the presence or absence of a predetermined pressure change by the
pressure sensor 242 and the direction thereof. When it is detected that the earplug bone
conduction effect is generated, the process proceeds to step S54, a phase inversion signal of
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one's own voice is added to the cartilage conduction vibration source 225, and the process
proceeds to step S58. On the other hand, when it is detected in step S52 that the earplug bone
conduction effect is not generated, the process proceeds to step S56, and the addition of the
phase inversion signal of one's own voice to the cartilage conduction vibration source 225 is
eliminated. Migrate to In step S58, it is checked whether or not the call state is disconnected. If
the call is not disconnected, the process returns to step S22, and steps S22 and S46 to step S58
are repeated until a call disconnection is detected in step S58. This responds to the occurrence
and disappearance of the earplug bone conduction effect during a call.
[0057]
The various features of each of the embodiments described above are not limited to the
individual embodiments, and can be replaced or combined with the features of the other
embodiments as appropriate. For example, in the flowchart of the fourth embodiment in FIG. 10,
there is no configuration for switching between the cartilage conduction vibration unit for the
right ear and the cartilage conduction vibration unit for the left ear in the flowchart of the first
embodiment of FIG. The right ear cartilage conduction vibration unit 24 and the left ear cartilage
conduction vibration unit as in the first embodiment are adopted as the configuration of the
conduction vibration unit 228, and the loop of step S22 and step S46 to step S58 is repeated in
the ear. In addition to the response to the occurrence and disappearance of the thrombus guiding
effect, the response to the hand-held change of the mobile phone between the right ear call state
and the left ear call state is also performed by the function according to step S24 to step S26 of
FIG. It may be configured as follows. Further, it is possible to add the check of the horizontal
stationary state and the off function of the cartilage conduction vibration unit in the fourth
embodiment of FIG. 10 to the first to third embodiments. Furthermore, in Examples 1 to 3, it is
also possible to adopt a cartilage conduction vibration unit as in Example 4.
[0058]
The present invention can be applied to mobile phones.
[0059]
225 cartilage conduction vibration source 227 vibration conductor 225, 227 cartilage
conduction vibration unit 224, 226 vibration conductor end 34 tragus 19, 21, 22 sensor 49
gravity acceleration detection unit 222, 223 voice input unit 239 control unit 240 phase reversal
Section 238 Sound quality adjustment section 225, 242 Contact state detection section 225
Piezoelectric element 236 Signal output section 242 Pressure detection section
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