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JP2012156780

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DESCRIPTION JP2012156780
A noncontact electronic device is provided. An electronic device (100) outputs an oscillating
device (10) for demodulating a modulation wave of a parametric speaker so as to recognize that
a sound source is located in a specific space (40), and that a user selects the space (40). The
recognition unit includes a recognition unit, and a control unit that performs processing
corresponding to the space 40 when the recognition unit recognizes the selection of the space 40
by the user. According to the electronic device 100, there is no need to contact the electronic
device 100 to select content. Therefore, a noncontact electronic device can be provided. [Selected
figure] Figure 1
Electronic device
[0001]
The present invention relates to an electronic device using ultrasonic waves.
[0002]
Various studies have been made on the technology relating to the speaker, and for example, one
using an oscillation device that oscillates an ultrasonic wave is mentioned.
By using an oscillation device that oscillates an ultrasonic wave for sound reproduction by a
speaker, it is possible to form a highly directional sound field. As a technique regarding the
speaker using an ultrasonic wave, the thing described in patent documents 1-3 is mentioned, for
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example.
[0003]
The technology described in Patent Document 1 relates to an audio system provided with a
superdirective speaker and a human sensor, which drives the superdirective speaker in
conjunction with the human sensor and automatically performs audio only for a limited area. It is
what makes broadcasting possible. The technique described in Patent Document 2 is to change
the output direction of each sound output by the high directivity speaker so that the sounds do
not interfere with each other. The technology described in Patent Document 3 is to form an
audible area that can be arbitrarily moved by controlling the frequency and the phase of the
oscillating ultrasonic wave.
[0004]
The technology described in Patent Document 3 also discloses one that uses this for a portable
device. As a technique regarding a portable apparatus, the thing of patent document 4 is also
mentioned, for example. The technology described in Patent Document 4 is to search for
information in a terminal, etc., using a signal from an acceleration sensor mounted on a portable
terminal.
[0005]
JP, 2005-159446, A JP, 2006-109241, A JP, 2002-345077, A JP, 2003-162371, A
[0006]
There are cases where a display unit for displaying a content list for selecting a certain content
and an operation unit for selecting a content are provided on the electronic device.
In this case, it is necessary to contact the electronic device to select the content. However, the
electronic device is contaminated by contact with a hand or the like. Therefore, a noncontact
electronic device is desired.
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[0007]
An object of the present invention is to provide a noncontact electronic device.
[0008]
According to the present invention, there is provided an oscillator for outputting a modulation
wave of a parametric speaker so as to be able to recognize that the sound source is located in a
specific space, a recognition unit for recognizing that the user has selected the space A control
unit that performs processing corresponding to the space when the recognition unit recognizes
the selection of the space by the user.
[0009]
According to the present invention, a noncontact electronic device can be provided.
[0010]
FIG. 1 is a plan view showing an electronic device according to a first embodiment.
It is sectional drawing which shows the electronic device shown in FIG.
It is a block diagram which shows the electronic device shown in FIG.
It is a top view which shows the oscillation apparatus shown in FIG. FIG. 4 is a cross-sectional
view showing the oscillation device shown in FIG. 3; It is sectional drawing which shows the
piezoelectric vibrator shown in FIG. It is a flowchart which shows operation | movement of the
electronic device shown in FIG. It is sectional drawing which shows the electronic device which
concerns on 2nd Embodiment. It is a block diagram which shows the electronic device shown in
FIG. It is a flowchart which shows operation | movement of the electronic device shown in FIG. It
is a block diagram showing the electronic device concerning a 3rd embodiment. It is a flowchart
which shows operation | movement of the electronic device shown in FIG. It is a block diagram
showing the electronic device concerning a 4th embodiment. It is a flowchart which shows
operation | movement of the electronic device shown in FIG.
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[0011]
Hereinafter, embodiments of the present invention will be described with reference to the
drawings. In all the drawings, the same components are denoted by the same reference numerals,
and the description thereof will be appropriately omitted.
[0012]
FIG. 1 is a plan view showing an electronic device 100 according to the first embodiment. FIG. 2
is a cross-sectional view showing the electronic device 100 shown in FIG. 1, and shows a cross
section taken along line AA 'of FIG. The electronic device 100 includes an oscillation device 10, a
recognition unit 30, and a control unit 20. The electronic device 100 is, for example, a portable
terminal device, a personal computer, a game machine, an advertisement device, or the like.
[0013]
The oscillator 10 outputs the ultrasonic wave 50 so as to be demodulated so that the sound
source can be recognized as being located in the specific space 40. The ultrasonic wave 50 is a
modulation wave of a parametric speaker. The recognition unit 30 recognizes that the user has
selected the space 40. The control unit 20 performs processing corresponding to the space 40
when the recognition unit 30 recognizes the selection of the space 40 by the user. Hereinafter,
the configuration of the electronic device 100 will be described in detail using FIGS. 1 to 5.
[0014]
FIG. 3 is a block diagram showing the electronic device 100 shown in FIG. As shown in FIG. 1, the
electronic device 100 further includes a housing 80. As shown in FIG. 3, the oscillation device 10,
the control unit 20, and the recognition unit 30 are disposed, for example, inside the housing 80.
[0015]
As shown in FIG. 1, a plurality of oscillating devices 10 can be formed. The plurality of oscillation
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devices 10 are disposed, for example, at the peripheral edge of the housing 80. Further, the
plurality of oscillation devices 10 are separately controlled by the control unit 20 so as to output
the ultrasonic waves 50 which are demodulated so that the sound source can be recognized to be
located in, for example, mutually different spaces 40. In this case, as described later, the plurality
of mutually different spaces 40 correspond to the same or different processes. As shown in FIG.
3, the oscillation device 10 can be configured by a plurality of oscillation devices 12. The
plurality of oscillation devices 12 are separately controlled by, for example, the control unit 20.
[0016]
The ultrasonic wave 50 is output from the oscillation device 10 so as to be demodulated in, for
example, the space 40. Thereby, the user can recognize that the sound source of the sound
reproduced by the ultrasonic wave 50 is located in the space 40. Also, for example, the
ultrasound 50 can be output to demodulate so that stereo sound is reproduced to the user's right
and left ears. In this case, the directivity of the ultrasonic wave 50 is adjusted so that the user
recognizes that the sound source of the stereo sound is located in the space 40.
[0017]
The space 40 is located, for example, around the electronic device 100 as shown in FIGS. 1 and 2.
Also, the space 40 may be formed at a position away from the electronic device 100. In addition,
a plurality of spaces 40 are provided as described above, for example.
[0018]
The recognition unit 30 includes, for example, an imaging unit 32 and a determination unit 34.
The imaging unit 32 captures an area including the space 40 to generate image data. The
determination unit 34 determines that the user has selected the space 40 by processing the
image data. The determination that the user has selected the space 40 is performed, for example,
by storing and storing in advance the feature amount of what the user uses to select the space 40
and collating the feature amount with the image data. Examples of what the user uses to select
the space 40 include hands. In this case, it is determined that the user has selected the space 40
by collating the shape and color of a hand or the like stored and stored in advance with the
image data.
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[0019]
The recognition unit 30 can also be configured to recognize the attribute of the user. The
attributes of the user include, for example, children, adults, elderly people, men, women and the
like. The recognition of the attributes of the user is performed, for example, by storing and
storing feature amounts of potential users for each attribute, and collating the feature amounts
with image data. The feature amount in this case includes, for example, the size of the distance
between the eyes, or the size and shape of a triangle connecting the eyes and the nose.
[0020]
Furthermore, the recognition unit 30 can be configured to recognize, for example, the selection
operation of the space 40 by the user. In this case, it is performed by recognizing the change of
the feature amount in the image data and the movement amount of the one used for the selection
of the space 40. For example, an operation in which the user shakes his / her hand vertically or
horizontally is recognized as a different selection operation.
[0021]
The control unit 20 is connected to the oscillation device 10 and the recognition unit 30. The
control unit 20 stores voice data to be reproduced by the ultrasonic wave 50 in correspondence
with a predetermined process. The oscillation device 10 outputs an ultrasonic wave 50 for
reproducing voice data to form a space 40 in which a sound source corresponding to the voice
data is recognized to be located. Then, when the space 40 in which the sound source of the
ultrasonic wave 50 is recognized is selected, the control unit 20 performs processing
corresponding to the audio data reproduced by the ultrasonic wave 50. Further, when a plurality
of oscillation devices 10 are formed, the control unit 20 may be configured to store and save a
plurality of different audio data corresponding to a plurality of different processes. In this case,
the plurality of oscillation devices 10 can respectively output ultrasonic waves 50 for
reproducing different audio data. As a result, a plurality of spaces 40 in which sound sources
corresponding to different sound data are recognized to be located are formed. Then, when one
of the plurality of spaces 40 is selected, the control unit 20 performs processing corresponding
to audio data that is recognized as the sound source being located in the selected space 40.
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[0022]
In addition, the control unit 20 may store and save voice data to be reproduced by the ultrasonic
wave 50 according to the attribute of the user. In this case, the ultrasonic wave 50 is output so as
to reproduce voice data corresponding to the attribute of the user recognized by the recognition
unit 30. For example, the ultrasonic wave 50 is output so as to reproduce voice data
corresponding to processing according to the gender and age of the user.
[0023]
In addition, the control unit 20 may output the ultrasonic wave 50 so as to reproduce voice data
according to the personal information of the user stored and stored in advance. The personal
information includes, for example, gender, age, address, hobbies, preferences and the like. These
personal information may be stored and stored in the electronic device, and may be stored and
stored in another device. If stored and stored in another device, the electronic device 100 has a
communication means for acquiring personal information from the other device.
[0024]
Furthermore, the control unit 20 stores and stores data related to the selection operation of the
space 40 by the user in correspondence with a fixed process. The data relating to the selection
operation is, for example, data of an operation in which the user shakes his / her hand vertically
or horizontally. Control part 20 performs processing corresponding to this selection operation,
when a user performs fixed selection operation in selection of space 40.
[0025]
FIG. 4 is a plan view showing the oscillation device 10 shown in FIG. As shown in FIG. 4, the
oscillation device 10 is configured, for example, by arranging a plurality of oscillation devices 12
in an array.
[0026]
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FIG. 5 is a cross-sectional view showing the oscillation device 12 shown in FIG. The oscillation
device 12 includes a piezoelectric vibrator 60, a vibrating member 62, and a support member 64.
The piezoelectric vibrator 60 is provided on one surface of the vibrating member 62. The
support member 64 supports the edge of the vibrating member 62.
[0027]
The control unit 20 is connected to the piezoelectric vibrator 60 via the signal generation unit
22. The signal generation unit 22 generates an electrical signal to be input to the piezoelectric
vibrator 60. The control unit 20 controls the signal generation unit 22 based on the information
input from the outside, thereby controlling the oscillation of the oscillation device 12. The control
unit 20 inputs a modulation signal as a parametric speaker via the signal generation unit 22. At
this time, the piezoelectric vibrator 60 uses a sound wave of 20 kHz or more, for example, 100
kHz as a transport wave of the signal.
[0028]
FIG. 6 is a cross-sectional view showing the piezoelectric vibrator 60 shown in FIG. As shown in
FIG. 5, the piezoelectric vibrator 60 includes a piezoelectric body 70, an upper electrode 72 and a
lower electrode 74. The piezoelectric vibrator 60 also has, for example, a circular or elliptical
shape. The piezoelectric body 70 is sandwiched between the upper electrode 72 and the lower
electrode 74. Further, the piezoelectric body 70 is polarized in the thickness direction. The
piezoelectric body 70 is made of a material having a piezoelectric effect, and is made of, for
example, lead zirconate titanate (PZT) or barium titanate (BaTiO 3) as a material having high
electromechanical conversion efficiency. The thickness of the piezoelectric body 70 is preferably
10 μm to 1 mm. When the thickness is less than 10 μm, since the piezoelectric body 70 is
made of a brittle material, breakage or the like is likely to occur during handling. On the other
hand, when the thickness exceeds 1 mm, the electric field strength of the piezoelectric body 70 is
reduced. This leads to a decrease in energy conversion efficiency.
[0029]
The upper electrode 72 and the lower electrode 74 are made of a material having electrical
conductivity, such as silver or silver / palladium alloy. Silver is a general purpose material with
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low resistance, and is advantageous in terms of manufacturing cost and manufacturing process.
In addition, a silver / palladium alloy is a low resistance material excellent in oxidation resistance
and excellent in reliability. The thickness of the upper electrode 72 and the lower electrode 74 is
preferably 1 to 50 μm. If the thickness is less than 1 μm, uniform molding becomes difficult.
On the other hand, if it exceeds 50 μm, the upper electrode 72 or the lower electrode 74
becomes a constraining surface with respect to the piezoelectric body 70, resulting in a decrease
in energy conversion efficiency.
[0030]
The vibrating member 62 is made of a material such as metal or resin having a high elastic
modulus with respect to ceramic which is a brittle material, and is made of a general-purpose
material such as phosphor bronze or stainless steel. The thickness of the vibrating member 62 is
preferably 5 to 500 μm. The longitudinal elastic modulus of the vibrating member 62 is
preferably 1 to 500 GPa. If the longitudinal elastic modulus of the vibrating member 62 is
excessively low or high, the characteristics and reliability as a mechanical vibrator may be
impaired.
[0031]
In the present embodiment, sound is reproduced using the operation principle of the parametric
speaker. The principle of operation of the parametric speaker is as follows. The principle of
operation of the parametric speaker is that ultrasonic waves with AM modulation, DSB
modulation, SSB modulation, FM modulation are emitted into the air, and the audible sound
appears due to non-linear characteristics when the ultrasonic waves propagate in the air Sound
reproduction. The term "nonlinear" as used herein means transition from laminar flow to
turbulent flow when the Reynolds number represented by the ratio of the inertial action of the
flow to the viscous action increases. That is, since the sound wave is finely disturbed in the fluid,
the sound wave is non-linearly propagating. In particular, when ultrasonic waves are emitted into
the air, harmonics associated with the non-linearity are significantly generated. In addition,
sound waves are in a dense / dense state in which molecular groups in the air are mixed in
density. If it takes time for air molecules to recover more than compression, air that can not be
recovered after compression will collide with continuously propagating air molecules, producing
shock waves and producing audible sounds. The parametric speaker can form a sound field only
around the user and is excellent in terms of privacy protection.
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[0032]
Next, an operation method of the electronic device 100 will be described. FIG. 7 is a flow chart
showing an operation method of the electronic device 100 shown in FIG. First, the oscillation
device 10 outputs the ultrasonic wave 50 (S10). At this time, the imaging unit 32 generates
image data of an area including the space 40 (S11).
[0033]
The ultrasonic wave 50, which is a modulated wave of the parametric speaker, is output so as to
be demodulated so that the sound source can be recognized as being located in the space 40.
Then, the user selects the space 40 (S12). The user selects the space 40 by touching the space
40, for example. Whether or not the user has selected the space 40 is determined by processing
the image data generated by the imaging unit 32 by the determination unit 34. When a plurality
of spaces 40 are formed, one of the plurality of spaces 40 is selected by, for example, touching
any of the spaces 40.
[0034]
When the determination unit 34 determines that the user has selected the space 40 (S12: Yes),
the control unit 20 performs a process corresponding to the selected space 40 (S13). The
processing corresponding to the selected space 40 is, for example, access to contents such as
mail, photos, moving pictures, music and the like. In addition, for example, it is possible to
constitute to reproduce the sound which corresponds to the contents. The reproduction of the
sound corresponding to the content is, for example, the reading of the sender of the mail or the
title, the sound of a moving image, the reproduction of music, or the like.
[0035]
In addition, when the user performs a certain selection operation and the determination unit 34
determines this selection operation, the control unit 20 can be configured to perform processing
corresponding to the selection operation. Examples of the processing corresponding to the
selection operation include display or deletion of a mail, selection of Yes / No, and the like.
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[0036]
Next, the effects of the present embodiment will be described. According to the electronic device
100 according to the present embodiment, the modulated wave of the parametric speaker is
output such that the oscillation device 10 is demodulated so as to recognize that the sound
source is located in the specific space 40. When the recognition unit 30 recognizes the selection
of the space 40 by the user, the control unit 20 performs processing corresponding to the
selected space 40. Thus, the user can recognize the position of the space 40 by the sound
reproduced by the ultrasonic wave 50. Then, the user can select the content by selecting the
space 40. Thus, there is no need to touch the electronic device to select the content. Therefore, a
noncontact electronic device can be provided.
[0037]
The display unit for displaying the content list and the operation unit for selecting the content
require a certain area in the electronic device. This is a major obstacle to miniaturizing electronic
devices. In addition, the amount of information presented to the user depends largely on the area
of the display unit. For this reason, the amount of information presented to the user may be
greatly limited. According to the electronic device 100, the content list is displayed by the sound
reproduced by the ultrasonic wave 50. Furthermore, the user selects content by selecting the
space 40. Therefore, there is no need to provide a display unit for displaying the content list and
an operation unit for selecting the content in the electronic device. Therefore, the electronic
device can be miniaturized. Further, the amount of information presented to the user is not
limited by the area of the display unit. Therefore, the amount of information presented to the
user is rich, and an easy-to-understand interface can be provided.
[0038]
Further, according to the electronic device 100, the target content can be identified by voice, and
the content can be selected by selecting the space 40 that recognizes that the sound source of
the voice is located. Thus, a simple and easy-to-understand user interface can be realized. In
addition, it is possible to provide an electronic device excellent from the viewpoint of barrier-free.
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[0039]
FIG. 8 is a cross-sectional view showing the electronic device 102 according to the second
embodiment, and corresponds to FIG. 2 according to the first embodiment. FIG. 9 is a block
diagram showing the electronic device 102 shown in FIG. The electronic device 102 according to
the present embodiment is the same as the electronic device 100 according to the first
embodiment except for the configuration of the recognition unit 30.
[0040]
As shown in FIG. 8, the oscillation device 10 outputs an ultrasonic wave 52 for a sensor
corresponding to the space 40. The ultrasonic waves 52 are output toward the space 40, for
example. Further, the ultrasonic wave 52 is output by, for example, one of the plurality of
oscillation devices 12. When the oscillation device 12 is used as a sound wave sensor, the signal
input to the control unit 20 is a command signal to oscillate the sound wave. Then, when the
oscillation device 12 is used as a sound wave sensor, the signal generation unit 22 causes the
piezoelectric vibrator 60 to generate a sound wave of the resonance frequency of the
piezoelectric vibrator 60.
[0041]
As shown in FIG. 9, in the electronic device 102 according to the present embodiment, the
recognition unit 30 has a sound wave detection unit 36. As shown in FIG. 4, when the oscillation
device 10 is configured by a plurality of oscillation devices 12, the sound wave detection unit 36
is configured by, for example, one of the plurality of oscillation devices 12.
[0042]
In the present embodiment, recognition that the user has selected the space 40 is performed as
follows. First, the sound wave detection unit 36 detects the reflected ultrasonic wave 52. Then,
by analyzing the detected ultrasonic waves 52, it is recognized that the user has selected the
space 40. The analysis of the ultrasonic wave 52 is, for example, analysis of the distance between
the electronic device 102 and the point at which the ultrasonic wave 52 is reflected. That is, the
distance is calculated based on the time from the output by the oscillation device 10 to the
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detection by the sound wave detection unit 36. Then, for example, when the distance is equal to
or less than a predetermined reference value, it is recognized that the user has selected the space
40.
[0043]
Next, an operation method of the electronic device 102 according to the present embodiment will
be described. FIG. 10 is a flow chart showing a method of operating the electronic device 102
shown in FIG. First, the oscillation device 10 outputs the ultrasonic waves 50 and 52 (S20). Next,
the user selects the space 40 (S21). The recognition that the user has selected the space 40 is
performed by detecting the ultrasonic wave 52 reflected by the sound wave detection unit 36.
When it is recognized that the user has selected the space 40 (S21: Yes), the control unit 20
performs processing corresponding to the selected space 40 (S22).
[0044]
Also in this embodiment, the same effect as that of the first embodiment can be obtained.
Further, the sound wave detection unit 36 constituting the recognition unit 30 can be configured
by one of the plurality of oscillation devices 12. Thus, the electronic device can be miniaturized.
[0045]
FIG. 11 is a block diagram showing the electronic device 104 according to the third embodiment,
which corresponds to FIG. 3 according to the first embodiment. The electronic device 104
according to the present embodiment is the same as the electronic device 100 according to the
first embodiment except for the configuration of the recognition unit 30.
[0046]
As shown in FIG. 11, the recognition unit 30 has an acceleration sensor 38. When the
acceleration sensor 38 detects a certain movement and the acceleration vector of the movement
is directed to the space 40, it recognizes the selection of the space 40 by the user. For example,
when the user moves the electronic device 104 in the direction of the space 40, the acceleration
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vector of the acceleration sensor 38 is directed to the space 40, and it is recognized that the user
selects the space 40.
[0047]
Next, an operation method of the electronic device 104 according to the present embodiment will
be described. FIG. 12 is a flow chart showing an operation method of the electronic device 104
shown in FIG. First, the oscillation device 10 outputs the ultrasonic wave 50 (S30). Next, the user
selects the space 40 (S31). The recognition that the user has selected the space 40 is performed
by the acceleration sensor 38 detecting a certain movement. When the user recognizes that the
space 40 has been selected (S31: Yes), the control unit 20 performs a process corresponding to
the selected space 40 (S32).
[0048]
Also in this embodiment, the same effect as that of the first embodiment can be obtained.
[0049]
FIG. 13 is a block diagram showing an electronic device 105 according to the fourth
embodiment, which corresponds to FIG. 3 according to the first embodiment.
The electronic device 105 according to the present embodiment is the same as the electronic
device 100 according to the first embodiment except for the configuration of the recognition unit
30.
[0050]
As shown in FIG. 13, the recognition unit 30 has a proximity sensor 39. The proximity sensor 39
recognizes that the object is positioned around the proximity sensor 39, thereby recognizing the
selection of the space 40 by the user. For example, when an object is located around the
proximity sensor 39 corresponding to the space 40, it is recognized that the user has selected the
space 40. Here, the object is, for example, an operation device or the like in which the other party
of the proximity sensor 39 is incorporated. Further, when the plurality of spaces 40 are formed
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by the plurality of oscillation devices 10, the plurality of proximity sensors 39 corresponding to
the plurality of spaces 40 are provided.
[0051]
Next, an operation method of the electronic device 105 according to the present embodiment will
be described. FIG. 14 is a flow chart showing an operation method of the electronic device 105
shown in FIG. First, the oscillation device 10 outputs the ultrasonic wave 50 (S40). Next, the user
selects the space 40 (S41). The recognition that the user has selected the space 40 is performed
by the proximity sensor 39 detecting the position of an object located around the proximity
sensor 39 and analyzing the detection result. When it is recognized that the user has selected the
space 40 (S41: Yes), the control unit 20 performs processing corresponding to the selected space
40 (S42).
[0052]
Also in this embodiment, the same effect as that of the first embodiment can be obtained.
[0053]
Although the embodiments of the present invention have been described above with reference to
the drawings, these are merely examples of the present invention, and various configurations
other than the above can also be adopted.
[0054]
DESCRIPTION OF SYMBOLS 10 oscillator apparatus 12 oscillation apparatus 20 control part 22
signal generation part 30 recognition part 32 imaging part 34 determination part 36 sound wave
detection part 38 acceleration sensor 39 proximity sensor 40 space 50 ultrasound 52 ultrasound
52 piezoelectric transducer 62 vibrating member 64 Reference Signs List 70 piezoelectric body
72 upper electrode 74 lower electrode 80 housing 100 electronic device 102 electronic device
104 electronic device 105 electronic device
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