JP2007053609

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DESCRIPTION JP2007053609
An object of the present invention is to easily control the directivity of an audio output.
SOLUTION: When the control unit vibrates the vibrating element 3B with a signal of a specific
frequency without vibrating the vibrating element 3A, the panel 2 is vibrated with the left side as
an axis, and the outputted voice is As shown by arrow 11, it has directivity in the left direction.
Conversely, when the control unit causes the vibrating element 3A to vibrate by the signal of the
specific frequency and does not vibrate the vibrating element 3B, the panel 2 is vibrated with the
right side as an axis, and the output voice is an arrow As shown in 12, it becomes directional in
the right direction. The present invention is applicable to flat panel speakers. [Selected figure]
Figure 2
フラットパネルスピーカ
[0001]
The present invention relates to a flat panel speaker, and more particularly to a flat panel
speaker that enables easy control of the directivity of audio output.
[0002]
BACKGROUND Conventionally, there are flat panel speakers that vibrate a flat panel by a
vibrating element.
This flat panel speaker is applied to, for example, a monitor of a television receiver or a personal
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computer, a speaker of a liquid crystal display or a plasma display (a speaker for outputting an
audio corresponding to an image displayed on the monitor) .
[0003]
There are various specific structures of the flat panel speaker, for example, by arranging a
plurality of flat panel speakers in an array and connecting them to each other, the entire
connected shape can be deformed, and the change of the shape There are some which control
the directivity of the voice output by the (see, for example, Patent Document 1).
[0004]
Further, for example, there is a type that can output voices of a plurality of channels with a panel
of apparently one sheet by using a honeycomb core panel and connecting with an overstretch
core with low bending rigidity (see, for example, Patent Document 2).
[0005]
Furthermore, there is also a system in which a plurality of independent vibration elements are
attached to the entire large panel, and signal processing is performed using a filter or the like to
improve frequency characteristics at a user's listening point (see, for example, Patent Document
3).
[0006]
Japanese Patent Application Laid-Open No. 2002-508897 Patent No. 3599699 Japanese Patent
Laid-Open No. 2000-92578
[0007]
However, in the case of Patent Document 2, for example, in order to control directivity, it is
necessary to physically deform the entire connected shape, and a mechanism therefor is
required, so the manufacturing cost and the scale of the device increase. Not only that, it may be
difficult to realize a mechanism that controls appropriately in accordance with, for example, a
user instruction or the like.
[0008]
Further, in the case of Patent Document 2, for example, the change in the directivity of the sound
output (the directivity of the sound to be emitted) is not taken into consideration, and it may be
difficult to control the directivity.
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[0009]
Furthermore, in the case of Patent Document 3, since complicated signal processing such as
controlling frequency characteristics is required, there is a possibility that it is difficult to control
directivity in real time with respect to a user instruction or the like.
[0010]
The present invention has been made in view of such a situation, and makes it possible to easily
control the directivity of audio output.
[0011]
The flat panel speaker according to one aspect of the present invention is a flat panel speaker
that outputs sound by vibrating a panel with a vibrating element, and is provided near both ends
of the panel facing each other to vibrate the panel. It has a vibration element pair which consists
of a vibration element, and the control means which controls the vibration of the said vibration
element pair so that the directivity of the output sound from the said panel may be controlled is
provided.
[0012]
The control means controls one of the vibration element pairs to vibrate, and controls the other
vibration so as not to vibrate the other vibration element, whereby the output sound from the
panel is converted to the other vibration element. It can be made to point to the side.
[0013]
A plurality of the panels provided with the pair of vibration elements near both ends, and the
control means controls the vibration of the pair of vibration elements for each of the panels so as
to control the directivity of the output sound of each panel Can be
[0014]
The plurality of panels may be different in shape or material.
[0015]
The control means may be a user instruction accepting means for accepting designation of a
mode by a user, and directivity of an output voice corresponding to the mode designated by the
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designation of the mode accepted by the user instruction accepting means. And selection means
for selecting a vibrating element to be vibrated.
[0016]
The control means further includes holding means for holding table information defining a
vibrating element to be vibrated for each mode, and the selection means vibrates with reference
to the table information held by the holding means. A vibrating element can be selected.
[0017]
In one aspect of the present invention, a pair of vibrating elements, which are provided near
opposite ends of the panel and consist of a plurality of vibrating elements for vibrating the panel,
are provided to control the directivity of the output sound from the panel, The vibration of the
vibrating element pair is controlled.
[0018]
According to one aspect of the present invention, voice can be output.
In particular, the directivity of the audio output can be easily controlled.
[0019]
The embodiments of the present invention will be described below. The correspondence between
the invention described in the present specification and the embodiments of the invention is as
follows.
This description is to confirm that the embodiments supporting the invention described in the
claims are described in the present specification.
Therefore, although described in the embodiments of the invention, even if there is an
embodiment which is not described here as corresponding to the invention, it means that the
embodiment is It does not mean that it does not correspond to the invention.
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Conversely, even if the embodiments are described herein as corresponding to an invention, that
means that the embodiments do not correspond to inventions other than the invention. Absent.
[0020]
Moreover, this description does not mean all of the inventions described herein.
In other words, this description is the existence of the invention described herein and not claimed
in the present application, that is, the existence of the invention to be filed in division or added by
correction in the future. It is not something to deny.
[0021]
The flat panel speaker according to one aspect of the present invention is a flat panel speaker
(for example, FIG. 1) that outputs sound by vibrating a panel (for example, the panel in FIG. 1)
with a vibrating element (for example, the vibrating element in FIG. 1). Flat panel speaker) having
a pair of vibrating elements provided in the vicinity of opposite ends of the panel and including a
plurality of vibrating elements for vibrating the panel, and controlling directivity of output sound
from the panel Thus, control means (for example, the control unit of FIG. 1) for controlling the
vibration of the vibration element pair is provided.
[0022]
The control means controls one of the vibration element pairs to vibrate, and controls the other
vibration so as not to vibrate (for example, FIG. 2A or 2B). The output sound can be directed to
the other vibrating element side (for example, the arrows in FIGS. 2A and 2B).
[0023]
There are a plurality of the panels provided with the vibrating element pair near both ends (for
example, the panel 61 and the panel 62 in FIG. 9), and the control means controls the vibration
of the vibrating element pair for each panel to It is possible to control the directivity of the
output sound of the panel.
[0024]
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The plurality of panels can be different in shape or material (eg, the panel of FIG. 14).
[0025]
The control means receives a user instruction accepting means (for example, the receiving unit in
FIG. 15) for accepting designation of a mode by a user, and an output voice corresponding to a
mode designated by the designation of the mode accepted by the user instruction accepting
means And a selection unit (for example, a signal selection unit shown in FIG. 15) for selecting a
vibrating element to be vibrated so as to obtain the directivity.
[0026]
The control means further includes holding means (for example, a parameter map of FIG. 15) for
holding table information defining a vibrating element to be vibrated for each mode, and the
selection means is held by the holding means. The vibration element can be selected to be
vibrated by referring to the table information.
[0027]
Hereinafter, embodiments of the present invention will be described with reference to the
drawings.
[0028]
FIG. 1 is a view showing a configuration example according to an embodiment of a flat panel
speaker to which the present invention is applied.
[0029]
In FIG. 1, the flat panel speaker 1 is a speaker that outputs sound by vibrating a panel with a
vibrating element.
In the standing position, the user 10 listens to the sound output from the flat panel speaker 1 by
acquiring the wave of the sound propagated through the air as the panel 2 of the flat panel
speaker 1 vibrates.
[0030]
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The flat panel speaker 1 includes a flat plate-like panel 2 to be vibrated, a vibrating element 3A
and a vibrating element 3B to vibrate the panel 2, wiring 4A for the vibrating element 3A, wiring
4B for the vibrating element 3B, wiring 4A and wiring The control unit 5 controls the directivity
of the sound output and the sound output by controlling the operation of the vibration element
3A and the vibration element 3B electrically connected by 4B.
[0031]
The panel 2 is, for example, a diaphragm formed of various materials represented by acrylic,
glass, paper, metal, stone, or wood, or a synthetic material thereof.
Although the shape of the panel 2 is arbitrary, generally a flat plate is used.
The panel 2 is vibrated by the vibrating element 3A and the vibrating element 3B.
[0032]
The vibrating element 3A and the vibrating element 3B have, for example, a coil circuit and the
like, and are provided near the left and right ends on the back side of the panel 2 in the drawing.
The vibrating element 3A and the vibrating element 3B convert the electric signal supplied from
the control unit 5 through the wiring 4A and the wiring 4B into vibration, and transmit the
vibration to the panel 2.
In the following, the vibrating element 3A and the vibrating element 3B are simply referred to as
the vibrating element 3 when it is not necessary to distinguish them from each other.
The wiring 4A and the wiring 4B are simply referred to as the wiring 4 when it is not necessary
to distinguish them from each other.
[0033]
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The control unit 5 controls and vibrates the vibrating element 3A and the vibrating element 3B
based on an audio signal input supplied from the outside of the flat panel speaker 1.
That is, the control unit 5 appropriately supplies the input audio signal to the vibrating element
3A or the vibrating element 3B.
At this time, the control unit 5 receives a user instruction and the like, and determines a control
method of the vibration element 3A and the vibration element 3B based on the instruction.
[0034]
In addition, the number of the vibration elements 3 installed in the panel 2 may be any number.
Also, the control unit 5 may of course be provided on the panel 2.
[0035]
That is, the control unit 5 can control the output direction (directivity) of the sound by
controlling the vibrating element 3A and the vibrating element 3B.
FIG. 2 is a diagram for explaining the principle of the directivity control method.
[0036]
For example, as shown in FIG. 2A, when the control unit 5 vibrates the vibrating element 3B
(black circle) without vibrating the vibrating element 3A (white circle), the panel 2 is fixed at the
left side in the figure, Only will vibrate.
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Therefore, when the vibrating element 3B is vibrated by the signal of the specific frequency, the
panel 2 is vibrated about the left side in the figure, and the outputted sound is directed leftward
in the figure as shown by the arrow 11 ( It becomes directional (toward the center front of the
panel 2).
[0037]
Conversely, as shown in FIG. 2B, when the control unit 5 vibrates the vibrating element 3A (black
circle) and does not vibrate the vibrating element 3B (white circle), the panel 2 is fixed at the
right side in the figure. Only the left side will vibrate.
Therefore, when the vibrating element 3A is vibrated by the signal of the specific frequency, the
panel 2 is vibrated with the right side as the axis in the figure, and the outputted sound is
directed to the right in the figure as shown by the arrow 12 ( It becomes directional (toward the
center front of the panel 2).
[0038]
Note that this frequency depends on the material, shape, and the like of the panel 2.
Hereinafter, specific experimental examples of the relationship between directivity control and
frequency will be described.
[0039]
FIG. 3 is a view showing a configuration example of an apparatus used for the experiment.
In the case of FIG. 3, the panel 2 is an acrylic plate of 40 cm in the horizontal direction in the
figure × 30 cm in the vertical direction × 2 cm in depth.
Similar to FIG. 1, the vibrating element 3 </ b> A and the vibrating element 3 </ b> B are
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disposed in the vicinity of the back side left and right ends of the panel 2 in the drawing.
Seven microphones (microphones 21 to microphones 27) are disposed on a straight line parallel
to the front surface of the panel 2 at intervals of 30 cm at a position 100 cm away from the front
of the panel 2.
At this time, the fourth microphones 24 from the left and right ends are disposed on a vertical
line on the front surface passing through the center point of the front surface of the panel 2 so as
to be separated by 100 cm from the front surface.
[0040]
FIG. 4 shows the amplitudes of voices acquired in the microphones 21 to 27 when the vibration
element 3A on the left side in FIG. 3 is vibrated with signals of 4000 Hz, 2000 Hz, 1000 Hz, 500
Hz, 250 Hz and 125 Hz. It is a graph which shows a level.
In FIG. 4, as shown by the curve 31, in the case of the signal of 1000 Hz, the position of the
microphone 27 can detect the sound output by vibrating the vibrating element 3A the largest.
That is, when the flat panel speaker 1 outputs a signal with a frequency of 1000 Hz, the
directivity of the output sound can be most inclined in the right direction in the figure (output
toward the right front).
[0041]
FIG. 5 shows the amplitudes of voices acquired in the microphone 21 to the microphone 27
when the vibration element 3B on the left side in FIG. 3 is vibrated by signals of 4000 Hz, 2000
Hz, 1000 Hz, 500 Hz, 250 Hz and 125 Hz. It is a graph which shows a level. In FIG. 5, as shown
by the curve 32, in the case of the signal of 1000 Hz, the position of the microphone 21 can
detect the sound output by vibrating the vibrating element 3B the largest. That is, when the flat
panel speaker 1 outputs a signal with a frequency of 1000 Hz, the directivity of the output sound
can be most inclined in the left direction in the drawing (output toward the left front).
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[0042]
FIG. 6 is a graph showing the amplitude level of the sound acquired by the microphone 21 to the
microphone 27 when the signal of each frequency is output from the vibrating element 3A and
the vibrating element 3B. In FIG. 6, as shown by the curve 32, in the case of the signal of 1000
Hz, the position of the microphone 24 can detect the sound output by vibrating the vibrating
element 3A and the vibrating element 3B the largest. That is, the flat panel speaker 1 can be
controlled such that the sound radiated to the center front of the panel 2 becomes the largest by
vibrating both the vibrating element 3A and the vibrating element 3B.
[0043]
As described above, a pair of vibrating elements for vibrating the flat panel is provided in the
vicinity of opposite ends of one flat panel, such as top, bottom, left and right, and the control unit
controls the operation of each vibrating element of the vibrating element pair By doing this, the
flat panel speaker can control the directivity of the output sound from the flat panel. The
frequency component of the output voice for controlling the directivity depends on the shape
and material of the flat panel.
[0044]
Next, the configuration of the control unit 5 that performs such control will be described. FIG. 7
is a block diagram showing an example of the internal configuration of the control unit 5.
[0045]
In FIG. 7, the control unit 5 includes an instruction receiving unit 41 and an output selecting unit
42. The instruction receiving unit 41 includes, for example, a keyboard, a mouse, or a receiving
unit of an infrared signal transmitted from a remote controller, receives a user instruction or the
like from them, and supplies the instruction to the output selecting unit 42. The output selection
unit 41 receives an audio signal input from the outside of the flat panel speaker 1 and, based on
the instruction supplied from the instruction reception unit 41, selects the vibration element 3
that outputs the audio signal. Then, the output selection unit 41 outputs an audio signal to the
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selected vibration element 3. The number of the selection of the vibration element may be one or
more.
[0046]
An example of the flow of control processing executed by the control unit 5 of FIG. 7 will be
described with reference to the flowchart of FIG. 8.
[0047]
When the control process is started, the instruction receiving unit 41 performs a user instruction
receiving process in step S1, receives an input of a user instruction, and determines whether a
user instruction is received in step S2.
If it is determined that the user instruction has not been received, the instruction receiving unit
41 returns the process to step S1 and repeats the subsequent process.
[0048]
If it is determined in step S2 that the user instruction has been received, the instruction receiving
unit 41 supplies the instruction to the output selection unit 42, and the process proceeds to step
S3.
[0049]
In step S3, the output selection unit 42 selects the vibrating element 3 (the vibrating element 3
supplying the audio signal) to be vibrated based on the user's instruction, and supplies the audio
signal to the selected vibrating element 3 in step S4. Thus, the sound is output from the panel 2
near the selected vibration element 3.
When the process of step S4 ends, the control unit 5 ends the control process.
[0050]
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As described above, when the control unit 5 performs control processing to control the vibration
of each of the vibration elements 3 based on a user instruction, the user can easily select the
vibration element 3 to be vibrated. . Since the directivity of the output sound (sound radiated to
the front of the panel 2) is determined by the position of the vibration element 3 on the panel 2,
the user can easily control the directivity of the output sound.
[0051]
Of course, the number of panels 2 simultaneously controlled by the control unit 5 may be plural.
Further, the number of vibration elements 3 simultaneously controlled by the control unit 5 may
be any number.
[0052]
FIG. 9 is a view showing another configuration example of a flat panel speaker to which the
present invention is applied.
[0053]
The flat panel speaker 51 shown in FIG. 9 includes a panel 61 and a panel 62, a vibrating
element 61A and a vibrating element 61B, a vibrating element 62A and a vibrating element 62B,
and a control unit 5.
[0054]
The vibrating element 61A and the vibrating element 61B are installed on the panel 61 and
vibrate the panel 61. The vibrating element 62A and the vibrating element 62B are installed on
the panel 62 and vibrate the panel 62.
[0055]
The control unit 5 simultaneously controls the directivity of the audio output of the two panels
(four vibration elements).
In this case, the configuration of the control unit 5 is the same as that shown in FIG. 7 only by
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increasing the number of vibration elements to be controlled, and the control method is basically
the same.
[0056]
However, in this case, since two panels can be controlled, up to two voices can be directed and
output in two different directions.
For example, as shown in FIG. 9, the control unit 5 vibrates the vibrating element 61B on the
right side of the panel 61 and the vibrating element 62A on the left side of the panel 62, and the
vibrating element on the left side of the panel 61 By not vibrating the vibration element 62B on
the right side in the figure of 61 A and panel 62, the panel 61 is vibrated so that the output
sound from the panel 61 is directed in the left direction in the figure as shown by the arrow 63.
And the panel 62 can be vibrated so that the output sound from the panel 62 is directed to the
right in the figure as shown by the arrow 64.
[0057]
By performing control in this manner, the control unit 5 can cause voice output to be directed to
both the user 71 located on the left front of the flat panel speaker 51 in the drawing and the user
72 located on the right front in the drawing. it can.
That is, the control unit 5 can direct voice in a plurality of directions simultaneously.
[0058]
In addition, although the flat panel speaker to which the present invention is applied may be
used alone, it may be applied as a speaker for outputting the sound of an image displayed on a
monitor, for example.
[0059]
FIG. 10 is a view showing a use example of a flat panel speaker to which the present invention is
applied.
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[0060]
In FIG. 10, the flat panel speaker is used as an audio output unit of a scalable TV system capable
of operating a plurality of television receivers in cooperation.
[0061]
The scalable TV system 80 arranges nine television receivers (television receivers 81 to 89) in an
array of 3 rows × 3 columns, and operates them in cooperation as needed. It is a system.
For example, in the scalable TV system 80, the television receiver 81 to the television receiver 89
all use one display screen as one display screen to display one image or display different images.
To
[0062]
The number of television receivers constituting the scalable TV system 80 may be any number,
and the arrangement may be any number in the vertical direction and the horizontal direction.
Further, the sizes of the respective television receivers may not be the same.
[0063]
The scalable TV system 80 includes a control unit 90 that controls the operations of the
television receiver 81 to the television receiver 89, and the control of the control unit 90 can
perform the linked operation as described above.
[0064]
A flat panel speaker 91 to a flat panel speaker 99 are superimposed on front surfaces of display
surfaces of the television receiver 81 to the television receiver 89, respectively.
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The flat panel speaker 91 to the flat panel speaker 99 are each composed of a panel and a
vibrating element as described above, and although not shown, they are all electrically connected
to the control unit 90 and controlled by the control unit 90. .
[0065]
However, in this case, it is desirable that the panels of the flat panel speakers be made of a
transparent material such as acrylic or glass so as not to interfere with image display by the
television receiver 81 to the television receiver 89. .
[0066]
In such a scalable TV system 80, the user can control the directivity of the output sound
outputted from each of the flat panel speaker 91 to the flat panel speaker 99 only by selecting
the mode with, for example, a remote controller.
[0067]
For example, modes such as one-person mode, two-person mode, and three-person mode may be
provided according to the number of users who view and listen to images and sounds.
[0068]
FIG. 11 is a diagram for explaining the directivity of the output voice in the case of the oneperson mode.
In the case of FIG. 11, one user 100 views and listens to images and sounds.
In this mode, the control unit 90 vibrates the vibration element on the left side of the flat panel
speaker 91 in the drawing, the vibration element on the left side of the flat panel speaker 94 in
the drawing, and the vibration element on the left side of the flat panel speaker 97 in the
drawing. Flat panel speaker 91 by preventing the vibration element on the right side of the flat
panel speaker 91, the vibration element on the right side of the flat panel speaker 94, and the
vibration element on the right side of the flat panel speaker 97 from vibrating. Sound is output
from the flat panel speaker 94 and the flat panel speaker 97 in the direction of the arrow 101
(with directivity in the direction of the arrow 101 directed to the user 100).
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[0069]
Further, the control unit 90 vibrates the vibration element on the right side of the flat panel
speaker 93 in the drawing, the vibration element on the right side of the flat panel speaker 96 in
the drawing, and the vibration element on the right side of the flat panel speaker 99 in the
drawing. Flat panel speaker 93, flat by preventing the vibration element on the left side of the
speaker 93, the vibration element on the left side of the flat panel speaker 96, and the vibration
element on the left side of the flat panel speaker 99 from vibrating. The sound is output from the
panel speaker 96 and the flat panel speaker 99 in the direction of the arrow 102 (with directivity
in the direction of the arrow 102 directed to the user 100).
また、
[0070]
At this time, the control unit 90 does not vibrate the vibration element on the left side of the flat
panel speaker 93 in the drawing, the vibration element on the left side of the flat panel speaker
96 in the drawing, and the vibration element on the left side of the flat panel speaker 99 in the
drawing. Let's do it.
[0071]
By controlling the audio output as described above, the control unit 90 can view the television
receiver 91 to the television receiver 39 configured in three rows and three columns from the
left and right of the entire scalable TV system 80. It can be controlled so that the voice is emitted
toward the center front) (from the left and right).
As a result, the user who listens to the output sound can obtain a more remarkable stereo effect,
and can listen to a highly realistic sound.
[0072]
FIG. 12 shows the case of the two-person mode.
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The two-person mode is a mode in which audio is output to two users 111 and 112 located on
the left and right of the scalable TV system 80.
[0073]
In this mode, the control unit 90 includes a vibration element on the right of the flat panel
speaker 91 in the drawing, a vibration element on the right of the flat panel speaker 94 in the
drawing, a vibration element on the right of the flat panel speaker 97 in the drawing, the flat
panel speaker 93 The vibrating element on the left side of the figure, the vibrating element on
the left side of the flat panel speaker 96 in the figure, and the vibrating element on the left side
of the flat panel speaker 99 in the figure are vibrated, and the other vibrating elements are not
vibrated.
[0074]
That is, the control unit 90 causes the sound to be output from the flat panel speaker 91, the flat
panel speaker 94, and the flat panel speaker 97 in the direction of the arrow 113 (with
directivity in the direction of the arrow 113 toward the user 111). The sound is output from the
flat panel speaker 93, the flat panel speaker 96, and the flat panel speaker 99 in the direction of
the arrow 114 (with directivity in the direction of the arrow 114 directed to the user 112).
[0075]
By controlling the audio output as described above, the control unit 90 can output audio so as to
be directed to two users located on the left and right sides of the scalable TV system 80.
That is, for example, the control unit 90 can control the user 111 and the user 112 to listen to
different sounds.
That is, the user 111 and the user 112 of the scalable TV system 80 can view different images
and sounds.
[0076]
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FIG. 13 shows the case of the three-person mode. In this case, the control unit 90 can output
audio so as to be directed not only to the two users in FIG. 12 but also to the user located in front
of the front of the scalable TV system 80. That is, this three-person mode is a mode in which
audio is output to the user 121 located on the left front of the scalable TV system 80, the user
122 located on the front front, and the user 123 located on the right front.
[0077]
In the case of this mode, the control unit 90 further includes the vibrating element of the flat
panel speaker 92, the vibrating element of the flat panel speaker 95, and the vibrating element of
the flat panel speaker 98 in addition to the vibrating element vibrated in the case of FIG. Vibrate.
[0078]
In other words, the control unit 90 causes the sound to be output from the flat panel speaker 91,
the flat panel speaker 94, and the flat panel speaker 97 in the direction of the arrow 124 (with
directivity in the direction of the arrow 124 toward the user 121). A flat panel speaker 93, a flat
panel is made to output sound from the flat panel speaker 92, the flat panel speaker 95, and the
flat panel speaker 98 in the direction of the arrow 125 (with directivity in the direction of the
arrow 125 toward the user 122). The sound is output from the speaker 96 and the flat panel
speaker 99 in the direction of the arrow 126 (with directivity in the direction of the arrow 126
directed to the user 123).
[0079]
When the user switches the mode as shown in FIGS. 11 to 13 by, for example, the remote
controller, the control unit 90 switches the vibrating element to be vibrated to change the mode
of the output according to the instruction. .
That is, the user can easily control the directivity of the output voice only by changing the mode.
[0080]
The sizes of the panels of the flat panel speakers mounted on the scalable TV system 80 may not
be the same.
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For example, as shown in FIG. 14, the sizes of the panels of the flat panel speaker may be
different from one another.
[0081]
In FIG. 14, the sizes of panels 131 to 135 which are panels of flat panel speakers mounted on the
scalable TV system 80 are different from each other. In such a case, the frequency bands of the
output sound directed by each panel are different from one another. That is, the control unit 90
selects a panel to be vibrated according to the frequency band of the output sound to be directed.
By doing this, output voices of a plurality of frequencies can be directed.
[0082]
FIG. 15 is a block diagram showing an example of the internal configuration of the control unit
90. As shown in FIG.
[0083]
As shown in FIG. 15, an input signal including a video signal, an audio signal, and the like, such
as a television signal, is input to the control unit 90 from the outside, for example.
Further, the control unit 90 is connected with the first monitor 143-1 to the Nth monitor 143-N
(for example, the television receiver 81 to the television receiver 89 of the scalable TV system
80) as output destinations of the video signal. ing. Furthermore, the first vibration element 147-1
to the Nth vibration element 147-N (for example, the vibration element 91 to the vibration
element 99) are connected to the control unit 90 as output destinations of the audio signal.
[0084]
The control unit 90 generates an output video signal and an audio signal from the input signal,
selects a monitor or a speaker that outputs them, and outputs each signal to the selected
destination. In order to perform such processing, the control unit 90 includes a first signal
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receiving unit 141-1 to an Nth signal receiving unit 141-N, a video output control unit 142, a
receiving unit 144, a central processing unit (CPU) 145, and The voice output control unit 146 is
provided.
[0085]
The first signal receiving unit 141-1 to the Nth signal receiving unit 141-N respectively extract
the video signal and the audio signal included in the input signal, and supply the video signal to
the video output control unit 142, and the audio signal is The audio output control unit 146 is
supplied. The first signal receiving unit 141-1 to the N-th signal receiving unit 141-N are
configured by, for example, tuners of the respective television receivers. That is, the first signal
receiving unit 141-1 to the Nth signal receiving unit 141-N extract the video signal and the audio
signal of the program of an arbitrary channel from the input signal which is, for example, a
television signal.
[0086]
The video output control unit 142 performs predetermined processing such as decoding
processing and image processing on the supplied video signal, and outputs the video signal based
on a user instruction input through the CPU 145 as described later. First, one or more of the first
monitor 143-1 to the N-th monitor 143-N are selected, and a video signal is output to the
selected destination to display an image.
[0087]
The receiving unit 144 receives, for example, a mode selection instruction from the user via the
remote controller or the like, and supplies it to the CPU 145.
The CPU 145 supplies the mode selection instruction to the video output control unit 142, the
audio output control unit 146, and the like.
[0088]
The audio output control unit 146 performs predetermined processing such as decoding
processing and audio processing on the input audio signal based on a mode selection instruction
supplied via the CPU 145, and as an output destination of the audio signal. One or more of the
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vibrating elements 147-1 to 147-N are selected, and an audio signal is output to the selected
destination.
[0089]
The audio output control unit 146 includes a signal selection unit 151, first signal processing
units 152-1 to N-th signal processing unit 152-N, and a parameter map 153.
[0090]
The signal selection unit 151 is supplied by the CPU 145 as to which sound element to which
sound signal of the sound signals input from the first signal reception unit 141-1 to the Nth
signal reception unit 141-N is output. Based on the mode selection instruction.
For example, the signal selection unit 151 selects a parameter or an output destination
corresponding to the mode selection instruction supplied from the CPU 145 by referring to the
parameter map 153, and performs signal processing corresponding to the selected output
destination (vibration element). The audio signal is supplied to the unit (any one or more of the
first signal processing unit 152-1 to the Nth signal processing unit 152 -N).
[0091]
The first signal processing unit 152-1 to the N-th signal processing unit 152 -N perform audio
processing such as noise removal and filtering on audio signals supplied to the vibrating element
147-1 to the vibrating element 147 -N, respectively. Apply.
For example, the first signal processing unit 152-1 to the Nth signal processing unit 152 -N
respectively extract frequency components suitable for the size and material of the panel to be
vibrated by the vibration element, and supply the frequency components to the vibration element
Do.
[0092]
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The first signal processing unit 152-1 to the Nth signal processing unit 152 -N each perform
signal processing based on a mode selection instruction supplied from the CPU 145. For
example, the first signal processing unit 152-1 to the N-th signal processing unit 152 -N
determine parameters corresponding to mode information supplied from the CPU 145 by
referring to the parameter map 153, and use the determined parameters as the parameters.
Perform corresponding signal processing.
[0093]
The parameter map 153 is, for example, a storage medium such as a flash memory or a hard
disk, and has table information in which information on signal processing and signal input /
output is associated with an operation mode. That is, when the signal selection unit 151 and the
first signal processing unit 152-1 to the Nth signal processing unit 152 -N provide the parameter
map 153 with information on the mode designated by the user, the parameter map 153 holds
The information on the input / output destination of the parameter or signal corresponding to
the mode is provided based on the table information.
[0094]
Although FIG. 10 illustrates that the control unit 90 is provided inside the casing of the scalable
TV system 80 as a configuration different from the television receiver and the flat panel speaker,
the present invention is not limited to this. For example, the control unit 90 may be flat. It may
be built in the panel speaker 91 to the flat panel speaker 99. Further, the configuration shown in
FIG. 15 does not have to be formed as a single physical unit, and if electrically connected to each
other as shown in FIG. It may be incorporated in each of 91 to flat panel speakers 99, and the
other part may be incorporated in each television receiver. For example, the first signal receiving
unit 141-1 to the Nth signal receiving unit 141-N in FIG. 15 are incorporated in the respective
television receivers, and the video output control unit 142, the receiving unit 144, and the CPU
145 are television receivers. Alternatively, the audio output control unit 146 may be
incorporated in the flat panel speaker.
[0095]
Next, an example of a specific flow of control processing by the control unit 90 will be described
with reference to the flowchart in FIG.
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[0096]
When voice control processing is started, CPU 145 controls receiving unit 144 in step S21 to
perform user instruction acceptance processing for receiving a user instruction supplied from a
remote controller not shown, and in step S22, the user instruction It is determined whether the
mode information has been acquired by the reception process.
[0097]
When it is determined that the receiving unit 144 has not received the user instruction supplied
from the remote controller and does not acquire mode information which is information related
to the operation mode specified by the user, which is included in the user instruction, the CPU
145 The process returns to step S21 to repeat the subsequent processes.
[0098]
When it is determined in step S22 that the mode information has been acquired, the CPU 145
supplies the mode information to the signal selection unit 151 and the first signal processing
unit 152-1 to the Nth signal processing unit 152-N. The process proceeds to step S23.
[0099]
In step S23, the mode information is selected by the signal selection unit 151, and the first signal
processing unit 152-1 to the Nth signal processing unit 152-N refer to the parameter map 153
based on the supplied mode information.
In step S24, the signal selection unit 151 selects an input / output corresponding to the mode
designated by the user according to the table information of the parameter map 153 referred to,
and activates (connects) the selected input / output.
Also, in step S25, the first signal processing unit 152-1 to the N-th signal processing unit 152-N
set processing parameters corresponding to the mode designated by the user, according to the
table information of the parameter map 153 referred to, In step S26, the audio signal supplied
from the signal selection unit 151 is processed based on the set processing parameter.
In addition, the first signal processing unit 152-1 to the Nth signal processing unit 152 -N filter
the audio signal supplied from the signal selection unit 151 based on the set processing
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parameter in step S 27, and Extract frequency components suitable for the panel.
The first signal processing unit 152-1 to the Nth signal processing unit 152 -N that have
extracted the specific frequency component supply and output the audio signal to the vibrating
element 147-1 to the vibrating element 147 -N.
[0100]
The vibrating elements 53-1 to 53-N output the supplied audio signal by vibrating the
transparent panel 51 in step S28. When the voice is output while controlling the directivity, the
control unit 90 ends the control processing.
[0101]
By performing the control as described above, the user can easily control the directivity of voice
output only by specifying the mode.
[0102]
The number of transducer elements installed in one panel may be any number, and the direction
of directivity may be any direction such as vertical direction or oblique direction as well as left
and right.
[0103]
FIG. 17 is a view showing an example of a flat panel speaker to be superimposed on the front
surface of the television receiver.
[0104]
As shown in FIG. 17, the front surface of the television receiver 170 is configured by a display
surface 171 for displaying an image, and a frame 172 formed so as to surround the display
surface 171 and not displaying an image.
The panel 181 disposed on the front surface is a transparent panel formed of glass, acrylic, or
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the like so as not to interfere with image display by the display surface 171.
For example, twelve vibration elements 183-1 to 183-12 are arranged so as to surround the
panel 181 in a part of a predetermined range indicated by a double arrow 182 from the
periphery of the panel.
The length of the double arrow 182 corresponds to the thickness of the frame 172 of the
television receiver 170. That is, the vibrating elements 183-1 to 183-12 are arranged to be
positioned on the frame 172 when the panel 181 is superimposed on the front surface of the
television receiver 170.
[0105]
That is, the vibrating elements 183-1 to 183-12 are arranged to surround the display surface
171 of the television receiver 170. The control unit 90 selects an element to be vibrated from the
vibration elements arranged in this manner (for example, one of the pair of vibration elements
located on the diagonal line is vibrated and the other is vibrated. By setting the output voice to
have no directivity, the output voice can have directivity in any direction, such as up, down, left,
right or diagonal direction. Note that the number of vibration elements installed on the panel 181
at this time may be any number.
[0106]
As described above, the flat panel speaker is controlled by the control unit controlling the
vibration of the pair of vibration elements for vibrating the flat panel, which are provided near
the both ends, such as top, bottom, left, and right, of one flat panel. The directivity of the output
sound from the flat panel can be controlled. The frequency component of the output voice for
controlling the directivity depends on the shape and material of the flat panel.
[0107]
The series of processes of the control unit 90 described above can be performed by hardware or
can be performed by software. In this case, for example, the control unit 90 may be configured as
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a personal computer as shown in FIG.
[0108]
In FIG. 18, a central processing unit (CPU) 201 of a personal computer 200 performs various
operations according to a program stored in a read only memory (ROM) 202 or a program
loaded from a storage unit 213 to a random access memory (RAM) 203. Execute the process of
The RAM 203 also stores data necessary for the CPU 201 to execute various processes.
[0109]
The CPU 201, the ROM 202 and the RAM 203 are mutually connected via a bus 204. An input /
output interface 210 is also connected to the bus 204.
[0110]
The input / output interface 210 includes an input unit 211 such as a keyboard and a mouse, a
display such as a CRT (Cathode Ray Tube) and an LCD (Liquid Crystal Display), an output unit
212 such as a speaker, and a hard disk. A communication unit 214 configured of a storage unit
213 and a modem is connected. The communication unit 214 performs communication
processing via a network including the Internet.
[0111]
A drive 215 is also connected to the input / output interface 210 as necessary, and removable
media 221 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor
memory are appropriately attached, and a computer program read from them is It is installed in
the storage unit 213 as necessary.
[0112]
When the above-described series of processes are executed by software, a program that
configures the software is installed from a network or a recording medium.
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[0113]
For example, as shown in FIG. 18, this recording medium is a magnetic disk (including a flexible
disk) on which a program is recorded, which is distributed for distributing the program to the
user separately from the apparatus main body, an optical disk ( By removable media 221
comprising a CD-ROM (Compact Disk-Read Only Memory), a DVD (Digital Versatile Disk), a
magneto-optical disk (MD (Mini-Disk) (including registered trademark)), a semiconductor
memory, etc. Not only the configuration but also the ROM 202 in which the program is recorded
and delivered to the user in a state of being incorporated in advance in the apparatus main body,
the hard disk included in the storage unit 213 or the like.
[0114]
In the present specification, in the step of describing the program recorded on the recording
medium, processing performed in time series according to the described order is, of course,
parallel or not necessarily processed in time series. It also includes processing to be executed
individually.
[0115]
Further, in the present specification, the system represents the entire apparatus configured by a
plurality of devices (apparatus).
[0116]
The embodiment of the present invention is not limited to the above-described embodiment, and
various modifications can be made without departing from the scope of the present invention.
[0117]
It is a figure showing an example of composition concerning an embodiment of a flat panel
speaker to which the present invention is applied.
It is a figure explaining the principle of the control method of the directivity of output speech.
It is a figure explaining the mode of the experiment of the directivity of an output speech.
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It is a graph explaining the appearance of the experimental result of the directivity of output
speech.
It is a graph explaining the appearance of the experimental result of the directivity of output
speech.
It is a graph explaining the appearance of the experimental result of the directivity of output
speech.
It is a block diagram which shows the example of a structure inside a control part. It is a
flowchart explaining the example of the flow of control processing. It is a figure which shows the
other structural example of the flat panel speaker to which this invention is applied. FIG. 7 is a
diagram showing an application example of a flat panel speaker to a scalable TV system. It is a
schematic diagram which shows the example of 1 person mode. It is a schematic diagram which
shows the example of 2 persons mode. It is a schematic diagram which shows the example of 3
persons mode. It is a figure which shows the other structural example of a flat panel speaker. It is
a block diagram which shows the other structural example inside a control part. It is a flowchart
explaining the example of the flow of control processing. It is a figure which shows the other
structural example of a flat panel speaker. It is a figure showing an example of composition of a
personal computer to which one embodiment of the present invention is applied.
Explanation of sign
[0118]
DESCRIPTION OF SYMBOLS 1 flat panel speaker, 2 panels, 3 vibrators, 4 wiring, 5 control parts,
41 instruction ¦ indication reception parts, 42 output selection parts, 51 flat panel speakers, 80
scalable TV systems, 81 to 89 television receivers, 90 control parts , 91 to 99 flat panel speaker,
146 voice output control unit, 151 signal selection unit, 152-1 first signal processing unit, 153
parameter map
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