close

Вход

Забыли?

вход по аккаунту

?

DESCRIPTION JP2012160983

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2012160983
The position of an operation unit operated by a user is interlocked with the direction in which
sound is heard. A mobile terminal device 100 detects a plurality of operation units (for example,
a plurality of operation keys 11) operated by a user and a detection unit 20 which detects which
operation unit of the plurality of operation units is operated. And directional speakers (for
example, parametric speakers 30). The portable terminal device 100 further includes an audio
control unit 41 that controls the directional speaker so that a sound image is formed at a position
corresponding to the position of the operation unit operated by the user among the plurality of
operation units. [Selected figure] Figure 1
Voice output device
[0001]
The present invention relates to an audio output device.
[0002]
The parametric speaker is also called a directional speaker and is characterized in that the
directivity of the output sound is high.
Therefore, by using a parametric speaker, it is possible to selectively form a sound image (sound
field) in a specific area.
11-04-2019
1
[0003]
For example, Patent Document 1 describes a technique for localizing a sound image at a
predetermined position using a parametric speaker. Further, Patent Document 2 describes a
technique for localizing a sound image at a position of an object in an image using a parametric
speaker.
[0004]
JP, 2010-68023, A JP, 2007-274061 A
[0005]
By the way, in a general voice output device, when voice output is performed in conjunction with
the user's operation, the voice is only output from the speaker with a certain directivity.
Further, even with the technique of Patent Document 2, only the sound image is localized at the
position of the object in the video.
[0006]
An object of the present invention is to provide an audio output device capable of interlocking
the position of an operation unit operated by a user with the direction in which sound is heard.
[0007]
The present invention relates to a plurality of operation units operated by a user, a detection unit
for detecting which one of the plurality of operation units is operated, a directional speaker, and
a plurality of operation units. And an audio control unit for controlling the directional speaker
such that a sound image is formed at a position corresponding to the position of the operation
unit operated by the user. .
[0008]
According to the present invention, the position of the operation unit operated by the user can be
interlocked with the direction in which the sound is heard.
11-04-2019
2
[0009]
It is a front view showing a portable terminal device as an audio output device concerning a 1st
embodiment.
It is a block diagram of the portable terminal device of FIG.
It is a schematic diagram of the oscillation apparatus with which the portable terminal device of
FIG. 1 is provided.
It is sectional drawing which shows the layer structure of a vibrator | oscillator. It is a flowchart
which shows the flow of operation | movement of 1st Embodiment. It is a flowchart which shows
the flow of operation | movement of 2nd Embodiment. It is a front view in the state where the
portable terminal device as an audio output device concerning a 3rd embodiment was folded. It is
a front view which shows the portable terminal device as an audio output device concerning a
4th embodiment. It is a disassembled perspective view which shows the structure of the MEMS
actuator used as a vibrator | oscillator of the oscillation apparatus with which the portable
terminal device as an audio | voice output device concerning 5th Embodiment is equipped. It is a
front view which shows the portable terminal device as an audio output device concerning a 6th
embodiment. It is a block diagram of the portable terminal device of FIG. It is a schematic
diagram for demonstrating the operation | movement which changes the formation position of a
sound image in 6th Embodiment.
[0010]
Hereinafter, embodiments of the present invention will be described using the drawings. In all
the drawings, the same components are denoted by the same reference numerals, and the
description thereof will be omitted as appropriate.
[0011]
First Embodiment FIG. 1 is a front view showing a portable terminal device 100 as an audio
output device according to a first embodiment, and FIG. 2 is a block diagram of the portable
11-04-2019
3
terminal device 100. As shown in FIG.
[0012]
The mobile terminal device 100 according to the present embodiment detects a plurality of
operation units operated by the user (for example, a plurality of operation keys 11) and which
operation unit among the plurality of operation units is operated. The directional speaker is
controlled such that a sound image is formed at a position corresponding to the position of the
operation unit operated by the user among the unit 20, the directional speaker (for example, the
parametric speaker 30), and the plurality of operation units And an audio control unit 41.
The mobile terminal device is, for example, a mobile phone, a PDA (Personal Digital Assistant), a
small game device, a laptop personal computer, or the like. The details will be described below.
[0013]
As shown in FIG. 1, the mobile terminal device 100 has a keyboard (operation unit group) 10
having a plurality of operation keys 11 and a parametric speaker 30.
[0014]
The plurality of operation keys 11 are for receiving input of operations when the user
respectively presses them, and are arranged in a matrix, for example.
[0015]
The parametric speaker 30 includes, for example, a plurality of oscillating devices 31 for
oscillating ultrasonic waves in an array.
The oscillation devices 31 are arranged, for example, in a matrix.
Furthermore, the parametric speaker 30 generates an electrical signal to be input to each
oscillation device 31. The parametric speaker 30 can be disposed, for example, in the vicinity of
the keyboard 10.
11-04-2019
4
[0016]
The portable terminal device 100 further includes an LED group (light emitting member group)
50 having a plurality of LEDs (light emitting members) 51, and a display unit 60 configured of a
liquid crystal display device or the like.
[0017]
The portable terminal device 100 includes, for example, first and second casings 101 and 102,
and a hinge portion 103 connecting the first and second casings 101 and 102 so that they can
be opened and closed mutually. There is.
For example, the keyboard 10 and the parametric speaker 30 are provided in the first housing
101, and the LED group 50 and the display unit 60 are provided in the second housing 102. The
keyboard 10, the parametric speaker 30, the LED group 50, and the display unit 60 are all
disposed on the inner side when the first and second housings 101 and 102 are closed.
[0018]
The LED group 50 is disposed on the side (for example, the upper right) of the arrangement area
of the display unit 60, and includes a plurality of (for example, three) LEDs 51 in a side-by-side
arrangement, for example.
[0019]
As shown in FIG. 2, the mobile terminal device 100 includes a detection unit 20 and a control
unit 40 in addition to the keyboard 10, the parametric speaker 30, the LED group 50, and the
display unit 60.
[0020]
The detection unit 20 has, for example, the same number of detection switches 21 as the
operation keys 11.
11-04-2019
5
When each detection switch 21 detects an operation on the corresponding operation key 11, it
outputs a signal (hereinafter, a detection signal) indicating that to the control unit 40.
[0021]
The control unit 40 controls the operation of each oscillation device 31 of the parametric
speaker 30 individually, the light emission control unit 42 controls the operation of each LED 51
of the LED group 50 individually, and the operation of the display unit 60 And a display control
unit 43 that controls the
[0022]
By controlling each oscillation device 31 of the parametric speaker 30 by the voice control unit
41, a sound image can be formed in a desired area.
That is, the sound image can be localized to a desired area.
More specifically, the sound control unit 41 is configured to form a sound image at a position
(for example, above the operation key 11) corresponding to the position of the operation key 11
operated by the user among the plurality of operation keys 11. The respective oscillation devices
31 are controlled. That is, for example, when the operation key 11a (FIG. 1) is operated, a sound
image is formed above the operation key 11a. When the operation key 11b (FIG. 1) is operated, a
sound image is formed above the operation key 11b.
[0023]
FIG. 3 is a schematic view of the oscillation device 31. As shown in FIG.
[0024]
The oscillation device 31 includes, for example, a sheet-like vibrating member 32, a vibrator 33,
and a support member 34.
The vibrator 33 is, for example, a piezoelectric vibrator, and is attached to one surface of the
11-04-2019
6
vibrating member 32. The support member 34 supports the edge of the vibrating member 32.
Further, the support member 34 is fixed to, for example, a circuit board (not shown) or a housing
of the mobile terminal device 100. The signal generation unit 35 and the voice control unit 41
constitute an oscillation circuit that vibrates the vibrator 33 by inputting an oscillation signal to
the vibrator 33 and causes the vibrator 33 and the vibration member 32 to oscillate a sound
wave.
[0025]
The vibrating member 32 vibrates by the vibration generated from the vibrator 33, and oscillates
a sound wave having a frequency of, for example, 20 kHz or more. The vibrator 33 also
oscillates, for example, a sound wave having a frequency of 20 kHz or more when the vibrator 33
vibrates. The vibrating member 32 also adjusts the fundamental resonant frequency of the
vibrator 33. The fundamental resonant frequency of the mechanical oscillator depends on the
load weight and the compliance. Since the compliance is mechanical rigidity of the vibrator,
controlling the rigidity of the vibrating member 32 can control the fundamental resonance
frequency of the vibrator 33. The thickness of the vibrating member 32 is preferably 5 μm or
more and 500 μm or less. Moreover, as for the vibration member 32, it is preferable that the
longitudinal elasticity coefficient which is a parameter | index which shows rigidity is 1 Gpa or
more and 500 GPa or less. If the rigidity of the vibrating member 32 is too low or too high, there
is a possibility that the characteristics and reliability of the mechanical vibrator will be impaired.
The material constituting the vibrating member 32 is not particularly limited as long as it is a
material having a high elastic modulus with respect to the vibrator 33 which is a brittle material
such as metal or resin, but from the viewpoint of processability and cost Stainless steel is
preferable.
[0026]
In the present embodiment, the planar shape of the vibrator 33 is circular. However, the planar
shape of the vibrator 33 is not limited to a circle. The vibrator 33 is fixed to the vibrating
member 32 by an adhesive on the entire surface of the vibrator 33 facing the vibrating member
32. Thus, the entire surface on one side of the vibrator 33 is restrained by the vibrating member
32.
[0027]
11-04-2019
7
The signal generation unit 35 generates an electrical signal to be input to the vibrator 33, that is,
a modulation signal in the oscillation device 31. The transport wave of the modulation signal is,
for example, an ultrasonic wave having a frequency of 20 kHz or more, and specifically, for
example, an ultrasonic wave of 100 kHz. The voice control unit 41 controls the signal generation
unit 35 according to a voice signal input from the outside.
[0028]
FIG. 4 is a cross-sectional view showing a layered structure in the thickness direction of the
vibrator 33. As shown in FIG. The vibrator 33 has a piezoelectric body 36, an upper surface
electrode 37 and a lower surface electrode 38.
[0029]
The piezoelectric body 36 is polarized in the thickness direction. The material constituting the
piezoelectric body 36 may be either an inorganic material or an organic material as long as it has
a piezoelectric effect. However, a material having high electromechanical conversion efficiency,
such as zirconate titanate (PZT) or barium titanate (BaTiO3) is preferable. The thickness h1 of the
piezoelectric body 36 is, for example, 10 μm or more and 1 mm or less. If the thickness h1 is
less than 10 μm, the vibrator 33 may be broken when the oscillator 31 is manufactured. When
the thickness h1 is more than 1 mm, the electromechanical conversion efficiency is too low, and
there is a possibility that a sufficient magnitude of vibration can not be obtained. The reason is
that, when the thickness of the vibrator 33 is increased, the electric field strength in the
piezoelectric vibrator decreases in inverse proportion.
[0030]
Although the material which comprises the upper surface electrode 37 and the lower surface
electrode 38 is not specifically limited, For example, silver and silver / palladium can be used.
Silver is used as a low-resistance, general-purpose electrode material, and thus has advantages in
manufacturing process and cost. Since silver / palladium is a low resistance material excellent in
oxidation resistance, it is advantageous from the viewpoint of reliability. Further, the thickness
h2 of the upper surface electrode 37 and the lower surface electrode 38 is not particularly
limited, but it is preferable that the thickness h2 is 1 μm or more and 50 μm or less. If the
11-04-2019
8
thickness h2 is less than 1 μm, it is difficult to form the upper surface electrode 37 and the
lower surface electrode 38 uniformly, and as a result, the electromechanical conversion
efficiency may be reduced. When the film thickness of the upper surface electrode 37 and the
lower surface electrode 38 exceeds 100 μm, there is a possibility that the upper surface
electrode 37 and the lower surface electrode 38 become a constraining surface with respect to
the piezoelectric body 36 to lower energy conversion efficiency.
[0031]
The vibrator 33 can have an outer diameter of φ 18 mm, an inner diameter of φ 12 mm, and a
thickness of 100 μm. Further, as the upper surface electrode 37 and the lower surface electrode
38, for example, a silver / palladium alloy (weight ratio is, for example, 7: 3) having a thickness of
8 μm can be used. Further, as the vibrating member 32, phosphor bronze having an outer
diameter of φ 20 mm and a thickness of 50 μm (0.3 mm) can be used. The support member 34
functions as a case of the oscillation device 31, and is formed in, for example, a cylindrical (for
example, cylindrical) shape with an outer diameter of φ 22 mm and an inner diameter of φ 20
mm.
[0032]
The parametric speaker 30 radiates into the air ultrasonic waves (transport waves) subjected to
AM modulation, DSB modulation, SSB modulation, and FM modulation from the plurality of
oscillation devices 31 respectively, and non-linearity when the ultrasonic waves propagate in the
air. Depending on the characteristics, it makes an audible sound appear. Here, non-linear means
transition from laminar flow to turbulent flow as the Reynolds number indicated by the ratio of
flow inertia action to viscosity action increases. The sound waves are non-linear and propagate
because the sound waves are finely disturbed in the fluid. Especially in the ultrasonic frequency
band, the nonlinearity of the sound wave can be easily observed. When ultrasonic waves are
radiated into the air, harmonics associated with the non-linearity of the sound waves are
generated notably. In addition, sound waves are in a dense / dense state in which concentration
of molecular density occurs in the air. And, if time is taken for air molecules to recover more than
compression, air that can not be recovered after compression collides with continuously
propagating air molecules and a shock wave is generated. The shock wave generates an audible
sound, that is, the audible sound is reproduced (demodulated). The parametric speaker 30 has an
advantage that the directivity of sound is high.
11-04-2019
9
[0033]
Next, a series of operations will be described.
[0034]
FIG. 5 is a flowchart showing a flow of control operation performed by the control unit 40 in the
first embodiment.
[0035]
First, the user operates any one of the plurality of operation keys 11 (for example, the operation
key 11a).
Then, the control unit 40 recognizes that the operation key 11a is operated by the detection
signal input from the detection switch 21 corresponding to the operation key 11a (Y in step
S11).
[0036]
Next, the voice control unit 41 of the control unit 40 causes a sound image to be formed at a
position corresponding to the position of the operation key 11a, for example, above the
operation key 11a, that is, audible sound is demodulated at that position. Control the parametric
speaker 30.
For example, the directivity of the parametric speaker 30 is controlled by controlling the phase of
the ultrasonic wave output from each oscillation device 31, and the position of the sound image
is adjusted. As a result, the sound image is localized above the operation key 11 (for example, the
operation key 11a) operated by the user (step S12).
[0037]
Therefore, at the timing when the user operates the operation key 11, the user can hear the voice
(operation sound) from the position (direction) of the operation key 11 operated by the user.
11-04-2019
10
Therefore, a novel feeling of operation can be obtained, such as the feeling that the position of
the operation key 11 and the position where the operation sound can be heard are interlocked
can be obtained.
[0038]
In order to realize such an operation, for example, the voice control unit 41 previously outputs,
for each operation key 11, the value of the phase of the ultrasonic wave output from each
oscillation device 31 (or, the output from each oscillation device 31 The value of the relative shift
amount of the phase of the ultrasonic wave to be detected is stored as a table. Then, the voice
control unit 41 extracts a value corresponding to the operated operation key 11 from the table,
and controls the phase of each oscillation device 31 based on the value. The table includes, for
example, a first table for determining the formation position of the sound image in the X
coordinate (the first direction parallel to the display screen), and the Y coordinate (in parallel to
the display screen with respect to the first direction). And the second table for determining the
formation position of the sound image in the orthogonal direction).
[0039]
Further, the sound reproduced in step S12 is, for example, a simple sound (for example, a sound
of a beep) for recognizing that the operation key 11 has been operated, and a sound common to
each operation key 11 is used. There is a certain thing. Alternatively, the sound reproduced in
step S12 may be a sound different for each operation key 11. That is, the voice control unit 41
may control the parametric speaker 30 so that the voice corresponding to the operation key 11
operated by the user is output. Examples of the voice that differs for each operation key 11
include the same voice as the pronunciation of the character associated with the operation key
11. Specifically, for example, in the case of the operation key 11 corresponding to the character
"a", an audio such as "a" may be output.
[0040]
Further, the resolution of the position where the sound image is localized in step S12 can be
appropriately changed according to the resolution (depending on the number of oscillation
devices 31 etc.) that can be realized by the parametric speaker 30. When a fine resolution
capable of forming a sound image at a different position for each operation key 11 is obtained, a
11-04-2019
11
sound image can be formed at a different position for each operation key 11. Alternatively, when
the position of the sound image can not be controlled so finely, each zone (for example, three
zones Z1 and Z2 shown in FIG. The sound image may be localized at every Z3). That is, when any
operation key 11 included in zone Z1 is operated, the sound image is localized in zone Z1, and
when any operation key 11 included in zone Z2 is operated, the sound image is localized in zone
Z2 The sound image may be localized in the zone Z3 when one of the operation keys 11 included
in the zone Z3 is operated. In this case, at least two zones are set.
[0041]
In step S13 following step S12, other processing (processing other than the processing in step
S12) according to the operation is performed. Specifically, for example, the light emission control
unit 42 causes the LED 51 to emit light in a predetermined light emission mode (lighting,
blinking, etc.), and the display control unit 43 causes the display unit 60 to display
predetermined information, an image, etc. Do. When the operation is not performed (N in step
S11), neither the formation of the sound image (step S12) nor the other processing according to
the operation (step S13) is performed.
[0042]
According to the first embodiment as described above, the detection unit 20 detects which
operation key 11 of the plurality of operation keys 11 is operated by the user, and the position of
the operation key 11 operated by the user Since the parametric speaker 30 is controlled by the
voice control unit 41 so that a sound image is formed at the corresponding position, the position
of the operation key 11 operated by the user, the direction in which the user hears the voice, and
Can be linked. Therefore, confirmation of the operation position in the case where there are a
plurality of operation keys 11 can be performed not only by sight and touch but also by hearing.
[0043]
Second Embodiment FIG. 6 is a flowchart showing a flow of control operation performed by the
control unit 40 in the second embodiment. FIG. 6 shows an example of a specific process of step
S13 (FIG. 5) described in the first embodiment. In the case of the present embodiment, the
configuration of the mobile terminal device 100 is as shown in FIG. 1 and FIG.
11-04-2019
12
[0044]
As described above, in step S13 of FIG. 5, processing (except for the processing in step S12) is
performed according to the operation. Specifically, for example, as shown in FIG. 6, a sound
image is formed at the light emission position while performing light emission control (step
S131) for causing the LED 51 to emit light in a predetermined light emission mode (lighting,
blinking, etc.) by the light emission control unit 42. The audio control unit 41 controls the
parametric speaker 30 so as to be controlled (step S132). The light emitting position is a position
corresponding to the LED 51 emitting light by the light emission control among the plurality of
LEDs 51, and is, for example, above the LED 51 emitting light. The method of adjusting the
position of the sound image is the same as in step S12. Further, in parallel with or subsequent to
the processes of steps S131 and S132, other processes according to the operation (for example,
display control unit 43 displays predetermined information, an image, etc. on display unit 60)
And the like (step S133).
[0045]
As described above, in the second embodiment, the portable terminal device 100 includes the
LED (light emitting member) 51 and the light emission control unit 42 that controls the LED 51,
and the sound control unit 41 performs the light emitting operation of the LED 51 The
parametric speaker 30 is controlled such that a sound image is formed at a position
corresponding to the position of the LED 51 in synchronization (synchronization). Therefore, the
user can hear the sound from the position (orientation) of the LED 51 that performs the light
emission operation at the timing when the LED 51 emits light. That is, it is possible to interlock
the position of the light emitting LED 51 with the direction in which the user can hear the sound.
Therefore, novel decoration by light emission and sound can be realized.
[0046]
Third Embodiment FIG. 7 is a front view of a portable terminal device 100 as a voice output
device according to a third embodiment in a folded state. Also in the third embodiment, the block
configuration of the mobile terminal device 100 is the same as that shown in FIG.
[0047]
11-04-2019
13
The structure of the mobile terminal device 100 according to the present embodiment is
different from the mobile terminal device 100 according to the second embodiment in the points
described below.
[0048]
First, in the second embodiment, the plurality of LEDs 51 are arranged in a line, whereas in the
second embodiment, the plurality of LEDs 51 are arranged in a matrix.
Specifically, for example, the LED group 50 has a total of 49 LEDs 51 in 7 columns and 7 rows.
[0049]
In the second embodiment, the LED group 50 and the parametric speaker 30 are disposed on the
inner side when the first and second casings 101 and 102 are folded, whereas the third
embodiment is different from the first embodiment. In the embodiment, when the first and
second casings 101 and 102 are folded, the LED group 50 and the parametrics are provided on
the outer surface (for example, the front surface when the second casing 102 is on the front
side). A speaker 30 is disposed. That is, in the case of the present embodiment, for example, the
LED group 50 and the parametric speaker 30 are provided in the second housing 102. However,
also in the present embodiment, in addition to the LED group 50, another LED group is also
provided on the inner side when the first and second casings 101 and 102 are folded (for
example, in the first embodiment) The same as the LED group 50) may be provided. Similarly,
also in the present embodiment, apart from the parametric speaker 30, another parametric
speaker 30 (for example, the first embodiment) is also used on the inner side when the first and
second housings 101 and 102 are folded. A form similar to the parametric speaker 30 may be
provided.
[0050]
In the second embodiment, the first and second casings 101 and 102 have a horizontally
elongated shape, that is, the first and second casings 101 and 102 are mutually opened and
closed via the hinge portion 103. An example in which the turning radius of the first and second
housings 101 and 102 is shorter than the length of the first and second housings 101 and 102
11-04-2019
14
in the axial direction (left and right direction in FIG. 1) of the hinge portion 103 Indicated. On the
other hand, in the third embodiment, for example, the first and second casings 101 and 102 have
a vertically elongated shape, that is, the turning radius of the first and second casings 101 and
102 is the axis of the hinge portion 103. The shape is longer than the length of the first and
second casings 101 and 102 in the direction (left and right direction in FIG. 7).
[0051]
In the case of the present embodiment, the sound control unit 41 controls the parametric
speaker 30 so that a sound image is formed at a position corresponding to the position of the
LED 51 performing the light emission operation among the plurality of LEDs 51 arranged in a
matrix. . As in the case of forming a sound image corresponding to the operation key 11 (step 12
in FIG. 5), a sound image may be formed at a position corresponding to the individual LED 51 or
for each zone including a plurality of LEDs 51. You may form a sound image.
[0052]
In addition, the light emission control unit 42 performs, for example, a series of light emission
control in which the plurality of LEDs 51 are caused to emit light in a predetermined order (light
emission pattern), whereby illumination by the light emission of the plurality of LEDs 51 can be
realized. Then, the sound control unit 41 controls (in synchronization with) such light emission
control to control the parametric speaker 30 so that a sound image is formed at a position
corresponding to the position of the LED 51 performing the light emission operation. Specifically,
for example, when light emission control of a light emission pattern is performed such that the
LED 51 that emits light moves, control such that the position of the sound image moves as the
movement is performed can be performed.
[0053]
Note that, for example, when the first and second housings 101 and 102 are folded, the control
of the parametric speaker 30 linked to the light emission control as described above can be
performed. Alternatively, the portable terminal device 100 may be, for example, a type having a
communication function such as a portable telephone, and in this case, the parametric speaker
30 linked to the light emission control at the time of an incoming call or an electronic mail.
Control can be performed.
11-04-2019
15
[0054]
According to the third embodiment as described above, it is possible to realize decoration by light
emission and sound more complicated and innovative than the second embodiment.
[0055]
Fourth Embodiment FIG. 8 is a front view showing a portable terminal device 100 as an audio
output device according to a fourth embodiment.
In each of the above-described embodiments, the example has been described on the premise
that the individual operation units (operation keys 11) are separately formed and individually
pressed. However, for example, the cross key 12 shown in FIG. As such, a plurality of operation
units (for example, four operation units 12a, 12b, 12c, 12d) may be integrally formed. Like the
common cross key 12, for example, the operation unit 12a instructs the upward movement, the
operation unit 12b instructs the downward movement, etc., and the operation unit 12c instructs
the left movement, etc. The operation unit 12 d can be used for an operation for instructing
movement to the right or the like. Moreover, the portable terminal device 100 may have the
other operation button 13 (FIG. 8) in addition to the operation key 11 of the keyboard 10 (FIG.
1).
[0056]
And in the case of this embodiment, when each operation part 12a-12d of the cross key 12 is
operated, a sound image can be formed in the position corresponding to the operated operation
parts 12a-12d. Alternatively, when any operation button 13 is operated, a sound image can be
formed at a position corresponding to the operated operation button 13.
[0057]
Fifth Embodiment The oscillation device 31 of the portable terminal device 100 according to the
present embodiment has a MEMS (Micro Electro Mechanical Systems) actuator 70 shown in FIG.
9 instead of the vibrator 33 (FIG. 3). ing. In other points, the portable terminal device 100
11-04-2019
16
according to the present embodiment is configured in the same manner as the portable terminal
device 100 according to the first to fourth embodiments.
[0058]
In the example shown in FIG. 9, the drive system of the MEMS actuator 70 is a piezoelectric
system, and the piezoelectric thin film layer 72 is sandwiched between the upper movable
electrode layer 74 and the lower movable electrode layer 76. The MEMS actuator 70 operates by
inputting signals from the signal generation unit 35 to the upper movable electrode layer 74 and
the lower movable electrode layer 76. For example, an aerosol deposition method is used to
manufacture the MEMS actuator 70, but is not limited to this method. However, it is preferable to
use the aerosol deposition method because the piezoelectric thin film layer 72, the upper
movable electrode layer 74, and the lower movable electrode layer 76 can be formed on curved
surfaces, respectively. The driving method of the MEMS actuator 70 may be an electrostatic
method, an electromagnetic method, or a heat conduction method.
[0059]
Sixth Embodiment FIG. 10 is a front view showing a portable terminal device 100 as an audio
output device according to a sixth embodiment, FIG. 11 is a block diagram of the portable
terminal device 100 of FIG. 10, and FIG. It is a schematic diagram for demonstrating the
operation | movement which changes the formation position of a sound image in form.
[0060]
In each of the above-described embodiments, an example has been described in which the
position at which the sound image is formed is controlled by controlling the phase of the
ultrasonic wave output from each oscillation device 31 of the parametric speaker 30.
On the other hand, in the present embodiment, the directivity of the parametric speaker 30 is
controlled by changing the output direction of the sound wave from the oscillation device 31 by
the actuator 39, and the position where the sound image is formed, that is, the audible sound is
demodulated. Control the position of the
[0061]
11-04-2019
17
In the case of the present embodiment, the parametric speaker 30 includes, for example, a single
(one) oscillating device 31, a plurality of actuators 39 for changing the direction of the oscillating
device 31, and the actuators 39 fixed. And a support portion 39a.
[0062]
The support 39 a is fixed directly or indirectly to the housing (for example, the first housing 101)
of the mobile terminal device 100.
The support part 39a is formed in flat form, for example.
[0063]
The actuator 39 is, for example, a piezoelectric element, and expands and contracts by
controlling an applied voltage. One end of each of the actuators 39 is fixed to the support portion
39 a, and the other end is fixed to, for example, the support member 34 of the oscillation device
31. For example, as shown in FIG. 12, each actuator 39 is provided to stand vertically from one
surface of the support 39a.
[0064]
The number of actuators 39 can be two or three. In the case where three actuators 39 are
provided, the degree of freedom in adjusting the orientation of the oscillation device 31 is
increased. For this reason, in the present embodiment, as shown in FIG. 11, it is preferable to
have three actuators 39. The expansion and contraction operation of these actuators 39 is
performed by the actuator control unit 44 (FIG. 11) of the control unit 40.
[0065]
FIG. 12 shows the operation in the case of two actuators 39 in order to simplify the description.
[0066]
11-04-2019
18
When the lengths of the actuators 39 are equal, the output direction of the ultrasonic wave from
the oscillation device 31 is opposite to the support portion 39a (that is, the vibrating member 32
of the oscillation device 31 and the support portion 39a are parallel to each other).
Thus, the sound image 1 is formed in the front direction of the support portion 39a (FIG. 12A).
[0067]
Further, by contracting any one of the actuators 39 (or extending one of the actuators 39), the
angle of the oscillation device 31 with respect to the support portion 39a is changed, and the
output direction of the ultrasonic wave from the oscillation device 31 is changed. (That is, the
vibrating member 32 can be inclined with respect to the support 39a). Thus, the sound image 1
is formed at a position offset from the front of the support portion 39a (FIGS. 12 (b) and 12 (c)).
[0068]
Therefore, in the present embodiment, the sound image 1 can be formed above the desired
operation key 11 or above the desired LED 51 by appropriately expanding and contracting the
actuators 39.
[0069]
According to the sixth embodiment, the same effect as that of the first embodiment can be
obtained.
Further, in the case of the sixth embodiment, since the formation position of the sound image 1 is
changed by changing the output direction of the sound wave from the oscillation device 31 by
the actuator 39, the parametric speaker 30 has a plurality of oscillation devices 31 in an array. It
is not necessary to have, for example, only a single oscillation device 31 may be provided.
[0070]
In each of the above embodiments, an example in which the position of the operation unit
disposed at a position different from the display unit 60 and the direction in which the sound is
11-04-2019
19
heard is interlocked has been described. However, when the display unit 60 is a touch panel The
position of the operation unit formed on the display unit 60 may be interlocked with the
direction in which the sound is heard.
[0071]
DESCRIPTION OF SYMBOLS 1 Sound image 51 LED 10 Keyboard 11 Operation key 11a
Operation key 11b Operation key 12a Operation part 12b Operation part 12c Operation part
12c Operation part 12d Operation part 13 Operation button 20 Detection part 21 Detection
switch 30 Parametric speaker 31 Oscillator 32 Vibration member 33 Vibration Child 34 Support
member 35 Signal generation unit 36 Piezoelectric body 37 Upper surface electrode 38 Lower
surface electrode 39 Actuator 39a Support unit 40 Control unit 41 Audio control unit 42 Light
emission control unit 43 Display control unit 44 Actuator control unit 50 LED group 60 Display
unit 70 Actuator 72 Piezoelectric thin film layer 74 upper movable electrode layer 76 lower
movable electrode layer 100 portable terminal device 101 first case 102 second case 103 hinge
portion
11-04-2019
20
Документ
Категория
Без категории
Просмотров
0
Размер файла
32 Кб
Теги
jp2012160983, description
1/--страниц
Пожаловаться на содержимое документа