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DESCRIPTION JP2013141213
Abstract: PROBLEM TO BE SOLVED: To provide a technology capable of appropriately
transmitting sound from an electronic device to a user. A cover panel 1 is provided on the front
surface of an electronic device 100. The display panel 52 is disposed to face the cover panel 1.
The piezoelectric vibrating element 55 vibrated based on the sound signal is a position on the
inner major surface 11 of the cover panel 1 that does not overlap the display panel 52 in a plan
view when the cover panel 1 is viewed from the inner major surface 11 side. Is located in
[Selected figure] Figure 9
Electronics
[0001]
The present invention relates to an electronic device that transmits sound to a user.
[0002]
Conventionally, various techniques have been proposed for electronic devices.
For example, in Patent Document 1, a piezoelectric vibration element is attached to the outer
surface of a housing of a telephone such as a mobile telephone or a fixed telephone via an elastic
member, and the user of the telephone is vibrated by vibrating the piezoelectric vibration
element. Techniques for transmitting sound are described.
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[0003]
JP 2005-348193 A
[0004]
In an electronic device such as a portable telephone, it is desirable that sound be transmitted
from the electronic device to a user as appropriately as possible.
[0005]
Therefore, the present invention has been made in view of the above-described point, and an
object of the present invention is to provide a technology capable of appropriately transmitting
sound from an electronic device to a user.
[0006]
In order to solve the above problems, an electronic device according to the present invention
includes a cover panel provided on the front surface of the electronic device, a display member
disposed to face the cover panel, a piezoelectric vibration element, and a sound signal. And a
drive unit configured to vibrate the piezoelectric vibrating element based on the display unit,
wherein the piezoelectric vibrating element is the display member in a plan view when the cover
panel is viewed from the inner main surface side on the inner main surface of the cover panel
And are arranged at a position not overlapping.
[0007]
According to the present invention, sound can be appropriately transmitted from the electronic
device to the user.
[0008]
It is a perspective view which shows the external appearance of an electronic device.
It is a front view which shows the external appearance of an electronic device.
It is a back view which shows the external appearance of an electronic device.
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It is a block diagram which shows the electric constitution of an electronic device.
It is a top view which shows a piezoelectric vibration element.
It is a side view showing a piezoelectric vibration element. It is a figure which shows a mode that
a piezoelectric vibration element bends. It is a figure which shows a mode that a piezoelectric
vibration element bends. It is sectional drawing which shows an electronic device. It is a top view
which shows a cover panel. It is a figure for demonstrating air conduction sound and conduction
sound. It is sectional drawing which shows the modification of an electronic device. It is a front
view which shows the modification of an electronic device. It is a side view which shows the
modification of an electronic device. It is a back view which shows the modification of an
electronic device. It is a back view which shows the modification of an electronic device. It is a
back view which shows the modification of an electronic device.
[0009]
<Appearance of Electronic Device> FIGS. 1 to 3 are a perspective view, a front view, and a rear
view showing the appearance of the electronic device 100 according to the embodiment,
respectively. The electronic device 100 according to the present embodiment is, for example, a
mobile phone.
[0010]
As shown in FIG. 1, the electronic device 100 includes a cover panel 1 and a case portion 2, and
the cover panel 1 and the case portion 2 are combined to form a substantially rectangular plate
in a plan view. Case 3 is configured.
[0011]
The cover panel 1 has a substantially rectangular shape in a plan view, and constitutes a portion
of the front portion of the electronic device 100 other than the peripheral portion.
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The cover panel 1 is formed of, for example, transparent glass or transparent acrylic resin. The
case portion 2 constitutes a peripheral portion, a side portion and a back portion of the front
portion of the electronic device 100. Case part 2 is formed, for example with polycarbonate resin.
[0012]
The cover panel 1 is provided with a display portion 1a on which various information such as
characters, symbols and figures are displayed. The display portion 1a has, for example, a
rectangular shape in plan view. The peripheral portion 1b surrounding the display portion 1a in
the cover panel 1 is black, for example, by sticking a film or the like, and is a non-display portion
where no information is displayed. A touch panel 53 described later is attached to the inner main
surface of the cover panel 1, and the user gives various instructions to the electronic device 100
by operating the display portion 1 a of the cover panel 1 with a finger or the like. be able to.
[0013]
Inside the device case 3, an operation unit 54 provided with a plurality of operation buttons 54a
is provided. Each operation button 54 a is a so-called hard key , the surface of which is
exposed from the lower end of the outer main surface 10 of the cover panel 1. At the lower end
of the cover panel 1, a hole is formed to expose a plurality of operation buttons 54a. In addition,
as shown in FIG. 2, a piezoelectric vibration element 55 described later is provided inside the
device case 3. Although electronic device 100 according to the present embodiment is provided
with a plurality of operation buttons 54 a that are hard keys , the number of the plurality of
operation buttons 54 a may be changed as appropriate, or the plurality of operation buttons 54 a
may be changed. It is not necessary to provide the operation button 54a of.
[0014]
As shown in FIG. 3, a speaker hole 20 and a microphone hole 21 are formed in the back surface
101 of the electronic device 100, in other words, the back surface of the device case 3. Further,
from the back surface 101 of the electronic device 100, an imaging lens 58a included in an
imaging unit 58 described later is exposed.
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[0015]
<Electric Configuration of Electronic Device> FIG. 4 is a block diagram showing the electrical
configuration of the electronic device 100. As shown in FIG. As shown in FIG. 4, the electronic
device 100 includes a control unit 50, a wireless communication unit 51, a display panel 52, a
touch panel 53, an operation unit 54, a piezoelectric vibrating element 55, an external speaker
56, a microphone 57, an imaging unit 58, and a battery. The components 59 are contained in the
device case 3.
[0016]
The control unit 50 includes a CPU 50a, a storage unit 50b, and the like, and centrally controls
the operation of the electronic device 100 by controlling other components of the electronic
device 100. The storage unit 50 b is configured of a ROM, a RAM, and the like. In the control unit
50, various functional blocks are formed by the CPU 50a executing various programs in the
storage unit 50b.
[0017]
The wireless communication unit 51 receives a signal from a communication apparatus such as a
mobile phone different from the electronic device 100 or a web server connected to the Internet
via the base station via the antenna 51a. The wireless communication unit 51 performs
amplification processing and down conversion on the received signal and outputs the result to
the control unit 50. The control unit 50 performs demodulation processing and the like on the
received signal to be input, and acquires a sound signal and the like indicating voice, music, and
the like included in the received signal. The wireless communication unit 51 performs upconversion and amplification processing on the transmission signal including the sound signal
and the like generated by the control unit 50, and wirelessly transmits the processed
transmission signal from the antenna 51a. A transmission signal from the antenna 51a is
received through a base station by a portable telephone different from the electronic device 100
or a communication device connected to the Internet.
[0018]
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The display panel 52 is, for example, a liquid crystal display panel or an organic EL panel, and is
controlled by the control unit 50 to display various information such as characters, symbols, and
figures. The information displayed on the display panel 52 is displayed on the display portion 1 a
of the cover panel 1 so that the information can be viewed by the user of the electronic device
100.
[0019]
The touch panel 53 is, for example, a projected capacitance type touch panel, and detects a user's
operation on the display portion 1 a of the cover panel 1. The touch panel 53 is attached to the
inner main surface of the cover panel 1 and includes two sheet-like electrode sensors disposed to
face each other. The two electrode sensors are bonded together by a transparent adhesive sheet.
[0020]
On one electrode sensor, a plurality of elongated X electrodes extending in the X-axis direction
(for example, the left-right direction of the electronic device 100) and arranged in parallel with
each other are formed. The other electrode sensor is formed with a plurality of elongated Y
electrodes which extend in the Y-axis direction (for example, the vertical direction of the
electronic device 100) and are arranged in parallel with each other. When the user's finger
contacts the display portion 1 a of the cover panel 1, the capacitance between the X electrode
and the Y electrode under the contact point changes to display the cover panel 1 on the touch
panel 53. An operation on the part 1a is detected. The capacitance change between the X
electrode and the Y electrode occurring in the touch panel 53 is transmitted to the control unit
50, and the control unit 50 is performed on the display portion 1a of the cover panel 1 based on
the capacitance change. Identify the content of the operation and perform the operation
according to it.
[0021]
The operation unit 54 outputs an operation signal indicating that the operation button 54 a is
pressed to the control unit 50 when the operation button 54 a is pressed by the user for each of
the plurality of operation buttons 54 a. The control unit 50 specifies which operation button 54a
of the plurality of operation buttons 54a has been operated based on the input operation signal,
and performs an operation according to the operated operation button 54a.
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[0022]
The piezoelectric vibrating element 55 is for transmitting a receiving sound to the user of the
electronic device 100. The piezoelectric vibrating element 55 is vibrated by the drive voltage
supplied from the control unit 50. The control unit 50 generates a drive voltage based on a
sound signal indicating a reception sound, and applies the drive voltage to the piezoelectric
vibration element 55. The piezoelectric vibration element 55 is vibrated by the control unit 50
based on the sound signal indicating the receiving sound, whereby the receiving sound is
transmitted to the user of the electronic device 100. As described above, the control unit 50
functions as a drive unit that vibrates the piezoelectric vibrating element 55 based on the sound
signal. The piezoelectric vibrating element 55 will be described in detail later.
[0023]
The external speaker 56 converts the electrical sound signal from the control unit 50 into a
sound and outputs it. The sound output from the external speaker 56 is output to the outside
from the speaker hole 20 provided on the back surface 101 of the electronic device 100.
[0024]
The microphone 57 converts a sound input from the outside of the electronic device 100 into an
electric sound signal and outputs the electric sound signal to the control unit 50. Sound from the
outside of the electronic device 100 is taken into the inside of the electronic device 100 from the
microphone hole 21 provided on the back surface 101 of the electronic device 100, and is input
to the microphone 57.
[0025]
The imaging unit 58 includes an imaging lens 58 a and an imaging element, and captures a still
image and a moving image based on control by the control unit 50.
[0026]
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The battery 59 outputs the power of the electronic device 100.
The power source output from the battery 59 is supplied to each electronic component included
in the control unit 50, the wireless communication unit 51, and the like included in the electronic
device 100.
[0027]
<Details of Piezoelectric Vibrating Element> FIGS. 5 and 6 are a top view and a side view showing
the structure of the piezoelectric vibrating element 55, respectively. As shown in FIGS. 5 and 6,
the piezoelectric vibrating element 55 has an elongated shape in one direction. Specifically, the
piezoelectric vibrating element 55 has a rectangular elongated plate shape in a plan view. The
piezoelectric vibrating element 55 has, for example, a bimorph structure, and includes a first
piezoelectric ceramic plate 55a and a second piezoelectric ceramic plate 55b which are bonded
to each other via a shim 55c.
[0028]
In the piezoelectric vibrating element 55, when a positive voltage is applied to the first
piezoelectric ceramic plate 55a and a negative voltage is applied to the second piezoelectric
ceramic plate 55b, the first piezoelectric ceramic plate 55a extends along the longitudinal
direction. The second piezoelectric ceramic plate 55b is contracted along the longitudinal
direction. As a result, as shown in FIG. 7, the piezoelectric vibrating element 55 is bent in a
mountain shape with the first piezoelectric ceramic plate 55 a being outside.
[0029]
On the other hand, in the piezoelectric vibrating element 55, when a negative voltage is applied
to the first piezoelectric ceramic plate 55a and a positive voltage is applied to the second
piezoelectric ceramic plate 55b, the first piezoelectric ceramic plate 55a is in the longitudinal
direction The second piezoelectric ceramic plate 55b is extended along the longitudinal direction.
As a result, as shown in FIG. 8, the piezoelectric vibrating element 55 is bent in a mountain shape
with the second piezoelectric ceramic plate 55 b outside.
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[0030]
The piezoelectric vibrating element 55 performs flexural vibration by alternately taking the state
of FIG. 7 and the state of FIG. 8. The control unit 50 bends and vibrates the piezoelectric
vibrating element 55 by applying an alternating voltage in which a positive voltage and a
negative voltage alternately appear between the first piezoelectric ceramic plate 55a and the
second piezoelectric ceramic plate 55b. Let
[0031]
In the piezoelectric vibrating element 55 shown in FIGS. 5 to 7, only one structure including the
first piezoelectric ceramic plate 55a and the second piezoelectric ceramic plate 55b bonded to
each other with the shim 55c interposed therebetween is provided. However, multiple such
structures may be stacked.
[0032]
<Arrangement Position of Piezoelectric Vibrating Element> FIG. 9 is a view showing a crosssectional structure in the vertical direction (longitudinal direction) of the electronic device 100.
FIG. 10 is a plan view of the cover panel 1 as viewed from the inner main surface 11 side.
[0033]
As shown in FIGS. 9 and 10, a touch panel 53 is attached to the inner major surface 11 of the
cover panel 1 so as to face the display portion 1 a of the cover panel 1. The display panel 52,
which is a display member, is disposed to face the cover panel 1 and the touch panel 53.
Therefore, the touch panel 53 is present between the cover panel 1 and the display panel 52. In
the cover panel 1, a portion facing the display panel 52 is a display portion 1a.
[0034]
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Further, a printed circuit board 70 on which various components such as the CPU 50 a and the
microphone 57 are mounted is provided inside the device case 3. The printed circuit board 70 is
disposed to face the display panel 52 on the back surface 101 side of the electronic device 100
rather than the display panel 52. Further, as shown in FIG. 10, the lower end of the cover panel 1
is provided with a plurality of holes 12 for exposing the plurality of operation buttons 54a.
[0035]
The piezoelectric vibrating element 55 is attached to the inner major surface 11 of the cover
panel 1 by an adhesive 60 such as a double-sided tape. The piezoelectric vibrating element 55 is
disposed on the inner major surface 11 of the cover panel 1 at a position not overlapping the
display panel 52 and the touch panel 53 in a plan view when the cover panel 1 is viewed from
the inner major surface 11 side. . In other words, when the cover panel 1 is viewed from the side
of the inner main surface 11 in the thickness direction, the piezoelectric vibrating element 55 is
disposed on the inner main surface 11 at a position not overlapping the display panel 52 and the
touch panel 53. ing. Therefore, the touch panel 53 and the display panel 52 do not exist between
the cover panel 1 and the piezoelectric vibrating element 55.
[0036]
The piezoelectric vibrating element 55 is provided on the upper end 11 a of the inner main
surface 11 of the cover panel 1. Specifically, as shown in FIG. 10, the piezoelectric vibrating
element 55 is formed on the central portion 11aa in the left-right direction (short direction
perpendicular to the longitudinal direction) at the upper end 11a of the inner main surface 11 of
the cover panel 1. Provided in
[0037]
The piezoelectric vibrating element 55 is disposed such that the longitudinal direction thereof
coincides with the left-right direction of the cover panel 1. The piezoelectric vibrating element 55
is disposed at the central portion 11 aa of the upper end 11 a so that the center in the
longitudinal direction coincides with the center in the lateral direction of the upper end 11 a of
the inner major surface 11 of the cover panel 1. It is done.
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[0038]
Here, as shown in FIGS. 7 and 8 described above, in the piezoelectric vibration element 55 that
performs flexural vibration, the displacement amount is largest at the center in the longitudinal
direction. Therefore, by arranging the piezoelectric vibrating element 55 at the upper end 11 a
so that the center of the longitudinal direction coincides with the center of the upper end 11 a of
the inner major surface 11 of the cover panel 1 in the left and right direction, The location in the
piezoelectric vibrating element 55 at which the displacement amount in flexural vibration is
maximum coincides with the center in the left-right direction of the upper end 11 a of the inner
major surface 11 of the cover panel 1.
[0039]
<Regarding Generation of Receiving Sound Due to Vibration of Piezoelectric Vibrating Element>
In the present embodiment, when the piezoelectric vibrating element 55 vibrates the cover panel
1, air conducted sound and conducted sound are transmitted from the cover panel 1 to the user.
It has become so. In other words, when the vibration of the piezoelectric vibration element 55 is
transmitted to the cover panel 1, the air conduction sound and the conduction sound are
transmitted from the cover panel 1 to the user.
[0040]
Here, the airway sound is a sound that is recognized by the human brain when a sound wave (air
vibration) that has entered the ear canal hole (so-called "ear hole") vibrates the tympanic
membrane. On the other hand, the conduction sound is a sound that is recognized by the human
brain when the auricle is vibrated and the vibration of the auricle is transmitted to the tympanic
membrane to vibrate the tympanic membrane. The air conduction sound and the conduction
sound will be described in detail below.
[0041]
FIG. 11 is a figure for demonstrating air conduction sound and conduction sound. The structure
of the ear of the user of the electronic device 100 is shown in FIG. In FIG. 11, a broken line 400
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indicates the conduction path of the sound signal (sound information) when airway sound is
recognized by the brain, and a solid line 410 indicates the conduction path of the sound signal
when conduction sound is recognized by the brain. Is shown.
[0042]
When the piezoelectric vibration element 55 attached to the cover panel 1 is vibrated based on
an electrical sound signal indicating a reception sound, the cover panel 1 vibrates and a sound
wave is output from the cover panel 1. When the user holds the electronic device 100 and brings
the cover panel 1 of the electronic device 100 close to the pinnae 200 of the user, or the cover
panel 1 of the electronic device 100 is in the pinnae 200 of the user. Sound waves emitted from
the cover panel 1 enter the ear canal hole 210. The sound wave from the cover panel 1 travels in
the ear canal hole 210 and vibrates the tympanic membrane 220. The vibration of the tympanic
membrane 220 is transmitted to the ossicles 230 and the ossicles 230 vibrate. Then, the
vibration of the earlobe 230 is transmitted to the cochlea 240 and converted into an electrical
signal in the cochlea 240. This electrical signal is transmitted to the brain through the auditory
nerve 250, and the received sound is recognized in the brain. Thus, the air conduction sound is
transmitted from the cover panel 1 to the user.
[0043]
Further, when the user holds the electronic device 100 in hand and applies the cover panel 1 of
the electronic device 100 to the pinnae 200 of the user, the pinna 200 is vibrated by the
piezoelectric vibrating element 55. It is vibrated by the cover panel 1. The vibration of the pinna
200 is transmitted to the tympanic membrane 220, and the tympanic membrane 220 vibrates.
The vibration of the tympanic membrane 220 is transmitted to the ossicles 230 and the ossicles
230 vibrate. Then, the vibration of the earlobe 230 is transmitted to the cochlea 240 and
converted into an electrical signal in the cochlea 240. This electrical signal is transmitted to the
brain through the auditory nerve 250, and the received sound is recognized in the brain. Thus,
the conductive sound is transmitted from the cover panel 1 to the user. In FIG. 11, the auricular
cartilage 200a inside the auricle 200 is also shown.
[0044]
Note that the conduction sound here is different from bone conduction sound (also called "bone
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conduction sound"). Bone conduction sound is a sound recognized in human brain by vibrating
the skull and the vibration of the skull directly stimulates the inner ear such as cochlea. In FIG.
11, for example, when the mandible 300 is vibrated, a plurality of arcs 420 indicate transmission
paths of sound signals when bone conduction sound is recognized by the brain.
[0045]
As described above, in the electronic device 100 according to the present embodiment, the
piezoelectric vibration element 55 vibrates the cover panel 1 on the front surface appropriately,
so that the air conducted sound from the cover panel 1 to the user of the electronic device 100 It
can transmit conduction sound. The structure of the piezoelectric vibrating element 55 according
to the present embodiment is devised so as to appropriately transmit the air conduction sound
and the conduction sound to the user. By configuring the electronic device 100 to transmit air
conduction sound and conduction sound to the user, various advantages occur.
[0046]
For example, since the user can hear the sound by placing the cover panel 1 on his / her ear, the
user can make a call without being concerned about the position at which he / she places his /
her ear on the electronic device 100.
[0047]
In addition, when the ambient noise is large, the user can make it difficult to hear the ambient
noise while pressing the ear against the cover panel 1 to increase the volume of the conducted
sound.
Therefore, the user can appropriately make a call even when the surrounding noise is loud.
[0048]
In addition, even when the user attaches the earplug or the earphone to the ear, the user can
recognize the reception sound from the electronic device 100 by applying the cover panel 1 to
the ear (more specifically, the pinnae). Can. In addition, even when the user attaches a headphone
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to his / her ear, the user can recognize a received sound from the electronic device 100 by
placing the cover panel 1 on the headphone.
[0049]
In the above example, as shown in FIG. 9, a gap is provided between the touch panel 53 and the
display panel 52, but the touch panel 53 and the display panel 52 may be in contact with each
other. When a gap is provided between the touch panel 53 and the display panel 52 as in the
present embodiment, the cover panel 1 is pushed by the user with a finger or the like, and the
cover panel 1 is bent to the display panel 52 side. The display panel 52 can be prevented from
being disturbed by the cover panel 1 hitting the display panel 52 (more precisely, the touch
panel 53 strikes the display panel 52).
[0050]
Further, as shown in FIG. 12, when the touch panel 53 exists over the entire surface of the inner
main surface 11 of the cover panel 1, the piezoelectric vibrating element is formed on the inner
main surface 11 of the cover panel 1 via the touch panel 53. You may arrange 55.
[0051]
In addition, without providing the touch panel 53 to the electronic device 100, the input may be
performed to the electronic device 100 only by the hard key.
In this case, a hard key other than the operation button 54 a may be further provided on the
front surface of the electronic device 100 or the like. Further, in this case, the cover panel 1 and
the display panel 52 may be disposed to face each other at an interval, or may be disposed in
contact with each other.
[0052]
As described above, in the electronic device 100 according to the present embodiment, the
piezoelectric vibrating element 55 is viewed on the inner major surface 11 of the cover panel 1
in a plan view when the cover panel 1 is viewed from the inner major surface 11 side. Since the
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display panel 52 is disposed at a position not overlapping the display panel 52, the display panel
52 is not present between the cover panel 1 and the piezoelectric vibrating element 55.
Therefore, the vibration of the piezoelectric vibrating element 55 can be easily transmitted to the
cover panel 1. Therefore, sound can be appropriately transmitted from the cover panel 1 to the
user.
[0053]
Also, as in the present embodiment, when the touch panel 53 is present between the cover panel
1 and the display panel 52, the portion of the cover panel 1 facing the display panel 52, that is,
the display portion 1a, is used. Will be pressed frequently with a finger etc. When the cover panel
1 is pressed, the cover panel 1 may be bent. Therefore, when the piezoelectric vibrating element
55 is disposed in a portion of the cover panel 1 that is likely to be pressed by the user, the
piezoelectric vibration The element 55 may be broken. In the present embodiment, on the inner
major surface 11 of the cover panel 1, the cover panel 1 is disposed at a position not overlapping
the display panel 52 in a plan view when viewed from the inner major surface 11 side. In other
words, the piezoelectric vibrating element 55 can be disposed in the portion of the cover panel 1
where the possibility of being pressed is low since the cover panel 1 is disposed in the portion
other than the display portion 1 a. Therefore, it can suppress that the cover panel 1 is pressed
and the piezoelectric vibration element 55 is damaged.
[0054]
Further, as in the present embodiment, when the touch panel 53 is present between the cover
panel 1 and the display panel 52, as shown in FIG. The cover panel 1 and the piezoelectric
vibrating element 55 are disposed on the inner main surface 11 by arranging the cover panel 1
at a position not overlapping the display panel 52 and the touch panel 53 in a plan view as
viewed from the inner main surface 11 side. In the meantime, not only the display panel 52 but
also the touch panel 53 can be absent. Therefore, the vibration of the piezoelectric vibrating
element 55 can be more easily transmitted to the cover panel 1, and the sound can be more
appropriately transmitted from the cover panel 1 to the user.
[0055]
In addition, when the user uses electronic device 100 in a call, the user is highly likely to put an
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ear on the upper end of the front surface of electronic device 100, so as in the present
embodiment, it is possible to use piezoelectric The vibration element 55 is provided on the upper
end of the inner main surface 11 of the cover panel 1 to increase the vibration at the upper end
of the front surface of the cover panel 1 so that the conducted sound can be easily transmitted to
the user. can do. In particular, since the user is highly likely to put an ear on the center in the
left-right direction at the upper end of the front surface of the electronic device 100, the
piezoelectric vibrating element 55 may be at the upper end of the inner main surface 11 of the
cover panel By providing the vibration on the center in the left-right direction at the upper end of
the front surface of the cover panel 1 by providing it on the center in the left-right direction, the
conducted sound can be more easily transmitted to the user. Further, as in the present
embodiment, when the piezoelectric vibration element 55 performs flexural vibration, a location
(the center in the longitudinal direction of the piezoelectric vibration element 55) at which the
displacement amount in the flexural vibration is maximum in the piezoelectric vibration element
55. ) By making the center in the left-right direction at the upper end of the inner main surface
11 of the cover panel 1 coincide, the vibration at the center in the left-right direction at the
upper end of the front of the cover panel 1 is further increased it can. As a result, the conducted
sound can be more easily transmitted to the user.
[0056]
Further, as in the present embodiment, when the piezoelectric vibrating element 55 has a long
shape in one direction, as shown in FIGS. 2 and 10 described above, the longitudinal direction of
the piezoelectric vibrating element 55 is a cover panel It is desirable to arrange so as to coincide
with the left and right direction of 1. When the piezoelectric vibrating element 55 is arranged
such that the longitudinal direction thereof coincides with the vertical direction of the cover
panel 1, in order to prevent the display panel 52 from overlapping the piezoelectric vibrating
element 55, You need to lower the position. Therefore, it is necessary to make the electronic
device 100 longer in the vertical direction or to make the display portion 1 a of the cover panel 1
smaller in the vertical direction. As in the present embodiment, by arranging the piezoelectric
vibrating element 55 so that the longitudinal direction thereof coincides with the left and right
direction of the cover panel 1, the length of the electronic device 100 in the vertical direction is
suppressed, The display portion 1a can be enlarged in the vertical direction.
[0057]
<About the hole of the earpiece (hole for receiver)> In an electronic device such as a mobile
phone, in order to take out the sound output from the receiver (speaker for reception) provided
inside the electronic device to the outside of the electronic device In some cases, a hole in the
earpiece may be made in the front cover panel 1.
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[0058]
In the electronic device 100 according to the present embodiment, the hole (the hole for the
receiver) of the earpiece is not made in the cover panel 1 that outputs the sound.
That is, on the surface of the electronic device 100, the hole of the earpiece is not provided.
Therefore, the process of making the hole of the earpiece in the cover panel 1 becomes
unnecessary. As a result, the manufacturing cost of the electronic device 100 can be reduced,
and the cost of the electronic device 100 can be reduced. In particular, in the case where the
cover panel 1 is formed of glass, it is difficult to make holes in the cover panel 1. Therefore, the
manufacturing cost of the electronic device 100 can be reduced by not forming the hole in the
earpiece in the cover panel 1. It can be further reduced. Further, by not forming the hole of the
earpiece in the cover panel 1, the strength of the cover panel 1 can be improved. Further, by not
forming the hole in the earpiece in the cover panel 1, the degree of freedom in design of the front
surface of the cover panel 1 is improved. In particular, when the cover panel 1 occupies most of
the front surface of the electronic device 100 as in the present embodiment, it is very effective
from the viewpoint of design that the cover panel 1 is not provided with the hole of the earpiece.
is there. Further, in the present embodiment, since there is no hole in the earpiece on the surface
of the electronic device 100, the problem that water, dust or the like enters from the hole in the
earpiece does not occur. Therefore, in the electronic device 100, the waterproof structure and
the dustproof structure for the problem are not required, and the cost of the electronic device
100 can be further reduced.
[0059]
In the present embodiment, since the receiving sound is generated by the vibration of the cover
panel 1, the receiving sound can be properly transmitted to the user even if the electronic device
100 does not have the hole of the receiving port.
[0060]
Although the cover panel 1 according to the present embodiment is provided with the hole 12
for exposing the operation button 54 a, the hole for exposing the operation button 54 a is
provided in the case portion 2, and the hole 12 is formed in the cover panel 1. You do not have
to
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Further, the operation button 54 a may be eliminated and the hole 12 may not be provided in the
cover panel 1. As a result, there is no hole in the cover panel 1, and it is possible to further
reduce the cost of the electronic device 100 and further improve the design freedom of the front
surface of the cover panel 1.
[0061]
Regarding the Position of the Microphone Hole In an electronic device such as a mobile phone, a
sound generated by the electronic device (a receiving sound in the mobile phone) may be input
to the microphone to generate an acoustic echo. In the electronic device 100, if the microphone
hole 21 is temporarily formed in the cover panel 1, the microphone hole 21 is provided in the
part that outputs the sound, so the sound easily enters the microphone hole 21. Sound can be
easily input. As a result, acoustic echo is likely to be generated.
[0062]
In the present embodiment, as shown in FIG. 3, the microphone hole 21 is provided in the
portion other than the cover panel 1 that outputs the sound, so the position of the portion that
outputs the sound in the electronic device 100 and the microphone The position of the hole 21
can be separated. Therefore, it can suppress that the receiving sound which the cover panel 1
outputs is input into the microphone hole 21, and, as a result, generation ¦ occurrence ¦
production of an acoustic echo can be suppressed.
[0063]
Although the microphone holes 21 are provided on the back surface 101 of the electronic device
100 in the present embodiment, the microphone holes 21 may be provided on the front surface
or the side surface of the electronic device 100 as long as it is a part other than the cover panel
1. FIG. 13 is a front view showing the electronic device 100 when the microphone hole 21 is
provided in the case portion 2 on the front surface of the electronic device 100. As shown in FIG.
FIG. 14 is a side view showing the electronic device 100 when the microphone hole 21 is
provided in the case portion 2 on the side surface of the electronic device 100. As shown in FIG.
In the example of FIG. 14, the microphone hole 21 is provided on the lower side surface 102
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(bottom surface) of the side surfaces of the electronic device 100.
[0064]
Since the sound output from the cover panel 1 on the front surface of the electronic device 100
does not easily go around on the back surface 101 of the electronic device 100, the microphone
hole 21 is opened on the back surface 101 of the electronic device 100 as in the present
embodiment. , Generation of acoustic echo can be further suppressed.
[0065]
Further, as shown in FIG. 15, the microphone hole 21 may be formed in the central region 101 a
along the vertical direction on the back surface 101 of the electronic device 100.
As a result, it is difficult for the sound that gets around the back surface 101 from the left and
right direction of the electronic device 100 to enter the microphone hole 21, so the occurrence
of acoustic echo can be further suppressed. Furthermore, when the user holds the electronic
device 100 with one hand and places an ear on the cover panel 1 to make a call, the microphone
hole 21 provided in the central area 101a is not easily blocked by the palm of the user , It
becomes easy to input to the microphone 57 the voice (transmission sound) emitted by the user.
[0066]
Further, as shown in FIG. 16, the microphone hole 21 may be formed in the central region 101 b
along the left and right direction on the back surface 101 of the electronic device 100. As a
result, it is difficult for the sound that gets around the back surface 101 from the vertical
direction of the electronic device 100 to enter the microphone hole 21, so the generation of
acoustic echo can be further suppressed. Furthermore, when the user holds the electronic device
100 with one hand and places an ear on the cover panel 1 to make a call, the microphone hole
21 provided in the central area 101b is not easily blocked by the palm of the user The voice
emitted by the user can be easily input to the microphone 57.
[0067]
Further, as shown in FIG. 17, the microphone hole 21 is formed in the central portion 101 c of
the back surface 101 of the electronic device 100 (a portion where the central region 101 a
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along the vertical direction and the central region 101 b along the horizontal direction overlap).
As a result, the sound engulfed on the back surface 101 of the electronic device 100 is further
less likely to enter the microphone hole 21, so the occurrence of acoustic echo can be further
suppressed.
[0068]
In the above-described example, although the present invention is applied to a portable
telephone as an example, the present invention can be applied to electronic devices other than
the portable telephone.
For example, the present invention can be applied to game machines, notebook computers,
portable navigation systems, and the like.
[0069]
DESCRIPTION OF SYMBOLS 1 cover panel 11 inner main surface 11a upper end part 50 control
part 52 display panel 53 touch panel 55 piezoelectric vibration element 100 electronic device
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20

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