JP2007043452

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DESCRIPTION JP2007043452
PROBLEM TO BE SOLVED: To provide a speaker integrated display device capable of securing the
visibility of an image and solving the heat generation problem of a display module. SOLUTION:
An opening 51 having substantially the same size as a display unit of a display module 6 is
provided in a front exterior cover 5, and the display module 6 is fixed on the back surface
thereof. The hollow panel plate 1 is provided with an opening 10 of substantially the same size as
the opening 51, and the hollow panel plate 1 is fixed to the front exterior cover 5 via a foam
cushion 3. Accordingly, since the display unit of the display module 6 is exposed to the outside,
high visibility can be ensured, and the heat generation problem of the display module 6 can be
resolved. Further, one surface of the exciter 2 is fixed to the back surface of the hollow panel
plate 1, the other surface of the exciter 2 is fixed to the front exterior cover 5, and the exciter 2
vibrates according to the audio signal. A deflection occurs at 1 and a sound is generated.
[Selected figure] Figure 1
Flat speaker and speaker integrated display device
[0001]
The present invention relates to a flat loudspeaker operating in a divided vibration mode, and
more particularly to a flat loudspeaker suitable for use in constructing a speaker integrated
display device.
[0002]
Conventionally, it has been practiced to arrange a transparent panel board on the front surface of
the display unit of a display device, and use this transparent panel board to construct a flat
speaker operating in a divided vibration mode (for example, Patent Documents 1, 2, 3).
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[0003]
21 and 22 are an exploded perspective view and a cross-sectional view of a conventional speaker
integrated display device in which a transparent panel plate is made to function as a flat speaker.
[0004]
Referring to FIGS. 21 and 22, in the vicinity of the left edge and the right edge of the flat
transparent panel 1a disposed on the front of the display unit of the speaker integrated type
display, an exciter 2 composed of a magnet and a voice coil is provided. Each one is attached.
The transparent panel plate 1a is attached to the surface side of the front exterior cover 5 via a
frame-like foam cushion 3, and the exciter 2 is attached to the surface side of the front exterior
cover 5 via the foam cushion 4 There is.
The front exterior cover 5 is provided with an opening corresponding to the display 8 of the
display module 6, and the display module 6 is a dustproof gasket in a form in which the opening
and the display 8 of the display module 6 coincide. It is attached to the back of the front exterior
cover 5 through 9.
In addition, in the holes opened in the left and right sides of the front exterior cover 5, a
dustproof net 7 which is a component for preventing the entry of foreign matter such as dust is
attached.
[0005]
In such a speaker-integrated display device, the exciter 2 vibrates in accordance with the input
audio signal, and the transparent panel plate 1 a bends in accordance with the vibration of the
exciter 2 to output a sound. Therefore, since the sound is output from the entire surface of the
transparent panel 1a, it is possible to spatially match the sound source and the image to obtain a
high presence. Further, the frequency characteristic of the above-described conventional speaker
integrated display device is as shown in FIG. As shown in the figure, since the variation in sound
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pressure at each frequency is small, good sound quality can be obtained. In FIG. 23, the
horizontal axis represents frequency, and the vertical axis represents sound pressure (SPL). JP-A2002-281597 JP-A-2003-179988 JP-A-10-191496
[0006]
However, the above-described conventional techniques have the following problems.
[0007]
The first problem is that the transparent panel board 1a adversely affects the image visibility.
Although acrylic is generally used as a material of the transparent panel plate 1a, a background
such as indoor lighting is reflected on the surface of the acrylic plate, and there are cases with
eye fatigue in long-term use. As a method of preventing reflection, there is a method of applying
AR (Anti Rerection) treatment to the surface of acrylic plate, but it is an expensive method, for
example, when the product is a display for personal computer for consumer use, cost impact is
great. There is a possibility of impairing the marketability.
[0008]
The second issue is the issue of manufacturability and quality. If foreign matter such as dust gets
into the inside of the transparent panel plate 1a, the user can not remove it because of the
structure, so that sufficient consideration is required in assembling and processing the product.
Since the assembly processing is performed after dust removal of each part is completed in a
dustproof booth, not only a huge amount of equipment cost and processing man-hours are
involved, but also a corresponding inspection process is required.
[0009]
The third issue is the issue of parts cost. In order to ensure excellent acoustic characteristics, it is
necessary to partially open the space constituted by the transparent panel plate 1a, the front
exterior cover 5 and the display module 6, and the dustproof net 7 is necessary to avoid foreign
matter contamination from here. It becomes. Further, at the mating portion of the periphery of
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the display unit 8 of the display module 6 and the front exterior cover 5, a dustproof gasket 9 for
the purpose of ensuring the air tightness is also required, and the cost of the dustproof
component increases. Furthermore, in the prior art, the transparent panel plate 1a is required to
have excellent optical properties and high manufacturing quality (such as scratches and foreign
matter contamination) of the material itself, and as a result, expensive material selection is
forced.
[0010]
The fourth problem is the heat generated by the display module 6. In recent years, the display
module tends to be large-sized, and the calorific value is increasing while the demand for the TV
display and the increase in the luminance also progress. For example, in a large-size TFT liquid
crystal, since a direct type light emission system is adopted and a large number of fluorescent
tubes are built in the module, the amount of heat generation is remarkably large as compared
with a medium-sized or smaller TFT liquid crystal. Further, in a PDP (plasma type) widely
adopted for a large display, the heat source is more serious because the phosphors serving as a
heat source are present innumerably on the display surface. In the prior art, since the display
section 8 of the display module 6 is covered with the transparent panel plate 1a, it becomes
difficult to satisfy the operating environment temperature guaranteed by the display module
manufacturer, and the screen size compatible with the prior art is limited. Will visit.
[0011]
Therefore, an object of the present invention is to ensure the visibility of an image at low cost
and to solve the problem of heat generation of the display module.
[0012]
A first flat loudspeaker according to the present invention is characterized by comprising: a
hollow panel board having an opening; and an exciter for vibrating the hollow panel board.
[0013]
A second flat speaker according to the present invention is the first flat speaker, wherein one
surface of the exciter is fixed to a fixed piece via a cushion for exciter, and the other surface of
the exciter is the hollow panel It is characterized in that it is fixed to a plate, and the fixing piece
is fixed to the hollow panel plate via a fixing piece cushion.
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[0014]
A third flat speaker according to the present invention is the first or second flat speaker, wherein
the first exciter fixed to one side of the hollow panel plate, and a side facing the one side of the
hollow panel plate. And a second exciter fixed to the
[0015]
The fourth flat loudspeaker according to the present invention is characterized in that, in the
first, second or third flat loudspeaker, the hollow panel plate is provided with a slit crossing the
side thereof.
[0016]
A fifth flat loudspeaker according to the present invention is characterized in that, in the first to
fourth flat loudspeakers, the exciter is a piezoelectric element.
[0017]
In a first speaker integrated display device according to the present invention, a display module
for displaying an image, and a front exterior cover having an opening portion in a portion
corresponding to the display portion of the display module with the display module fixed on the
back side. And a hollow panel plate having an opening at a portion corresponding to the opening
of the front exterior cover, and fixed to the front exterior panel via the hollow panel cushion, and
vibrating the hollow panel plate. And an exciter.
[0018]
In the second speaker integrated display device according to the present invention, in the first
speaker integrated display device, one surface of the exciter is fixed to the back surface side of
the hollow panel and the other surface is a cushion for exciter It is fixed to the surface side of the
front exterior cover via the.
[0019]
A third speaker integrated type display device according to the present invention is the first
speaker integrated type display device, wherein one surface of the exciter is fixed to a fixed piece
via an exciter cushion, and the other surface of the exciter Is fixed to the back surface of the
hollow panel plate, and the fixing piece is fixed to the rear surface of the hollow panel plate via a
cushion for fixing pieces.
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[0020]
A fourth speaker integrated type display device according to the present invention is the third
speaker integrated type display device, wherein a cylindrical grommet is inserted into the hole
provided in the hollow panel, and a screw is inserted into the hollow portion of the grommet. The
hollow panel is fixed to the front exterior cover by screwing the screw into a screw hole provided
in the front exterior cover.
[0021]
According to a fifth speaker integrated display device of the present invention, in the first to
fourth speaker integrated display devices, a damping plate is fixed around the contact portion
with the exciter on the back surface of the hollow panel plate. Fixing one surface of a shield
gasket to the edge of the back surface of the side of the hollow panel plate in contact with the
exciter, and fixing the other surface of the shield gasket to the surface side of the front exterior
cover A sound absorbing material is disposed in a space formed by the shield gasket, the back
surface of the hollow panel plate, and the front surface of the front exterior cover.
[0022]
A sixth speaker integrated display device according to the present invention includes: a display
module for displaying an image; a front exterior cover to which the display module is fixed and
an opening is provided in a portion corresponding to the display unit of the display module An
exciter having one surface fixed to the fixed piece through the exciter cushion and the other
surface fixed to the front exterior cover, the fixed piece being the front exterior cover through
the fixed piece cushion It is characterized in that it is fixed to
[0023]
A seventh speaker integrated display device according to the present invention is any one of the
first to fifth speaker integrated display devices, comprising: a first exciter fixed to one side of the
hollow panel; and the hollow panel panel. And a second exciter fixed to a side opposite to the one
side.
[0024]
The eighth speaker integrated display device according to the present invention is characterized
in that, in the first to seventh speaker integrated display devices, the exciter is a piezoelectric
element.
[0025]
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[Function] An opening is provided in the hollow panel board which becomes the diaphragm of
the flat speaker.
The size of the opening is approximately equal to the size of the display of the display module.
In addition, an opening having a size substantially equal to the size of the display unit of the
display module is also provided in the front exterior cover in which the display module is fixed to
the back surface.
The hollow panel plate is fixed to the surface side of the front exterior cover via the hollow panel
plate cushion.
Further, an exciter is fixed to the hollow panel plate, and when the exciter vibrates in accordance
with the audio signal, the hollow panel plate is bent and a sound is output by the bending.
In addition, since the center panel panel and the front exterior cover are provided with the
opening, the display surface of the display module is exposed to the outside.
[0026]
According to the present invention, the following effects can be obtained.
[0027]
The first effect is that the visibility is improved.
The reason is that the hollow panel plate having the opening is used as a diaphragm of a flat
speaker.
That is, in the prior art, since the image is viewed through the transparent panel plate serving as
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the diaphragm, the background is reflected on the transparent panel plate and the visibility is
poor.
On the other hand, in the present invention, since the hollow panel plate having the opening is
used as the diaphragm and the image displayed on the display module can be directly viewed
through the opening, the reflection does not occur. , Improve the visibility.
[0028]
The second effect is that manufacturability is improved.
The reason is that the hollow panel plate having the opening is used as a diaphragm of a flat
speaker.
That is, in the prior art, in order to prevent foreign matter mixing into the inside of the
transparent panel plate, the assembly operation in the dustproof booth is obliged, and the dust
removal operation to each part also takes a corresponding time. Since the inspection of foreign
matter contamination after assembly is also required, the productivity is greatly affected.
On the other hand, in the present invention, the hollow panel plate having the opening is used as
the diaphragm, and the display unit of the display module is exposed to the outside, so that the
contamination of the display unit can be easily removed.
Therefore, it is possible to eliminate the need for all the production facilities, manufacturing
processes, and inspection processes required for the prevention of contamination, and to achieve
a significant improvement in productivity as compared with the prior art, and at the same time
secure stable quality. It becomes easy.
[0029]
The third effect is that the cost of parts is reduced.
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The reason is that the hollow panel plate having the opening is used as a diaphragm of a flat
speaker.
That is, in the prior art, it is necessary to provide a dustproof gasket and a dustproof net in order
to prevent the display module from being contaminated.
On the other hand, in the present invention, the display unit of the display module is exposed to
the outside, and the display unit can be easily removed even if it gets dirty, so that the dustproof
gasket and the dustproof net become unnecessary. Parts cost is reduced. Furthermore, in the
prior art, as a result of finding an optical performance excellent for securing visibility and a high
quality material free from contamination etc. for the transparent panel plate, an expensive
material is used, but the present invention ranks it There is no problem in terms of function and
appearance even when using low-cost materials of low cost, and significant cost reduction is
possible.
[0030]
The fourth effect is that the heat generation problem of the display panel can be eliminated. The
reason is that the hollow panel plate having the opening is used as a diaphragm of a flat speaker.
That is, in the prior art, it is difficult to cope with the increase in the size of the display module,
that is, the amount of heat generation, because the heat generated in the display module is stored
inside the transparent panel plate. On the other hand, in the present invention, since the display
unit of the display module is open to the outside, sufficient heat dissipation can be ensured, and
it becomes possible to cope with a large display.
[0031]
Next, embodiments of the present invention will be described in detail with reference to the
drawings.
[0032]
First Embodiment First, a first embodiment of the present invention will be described.
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In the present embodiment, instead of the transparent panel plate 1a covering the entire surface
of the display unit 8 of the display module 6 in the conventional example, a hollow panel plate
having an opening at a portion corresponding to the display unit 8 is used as a diaphragm. It is
characterized by
[0033]
DESCRIPTION OF A STRUCTURE OF 1ST EMBODIMENT FIG. 1: is a disassembled perspective
view of 1st Embodiment of the speaker integrated type display apparatus concerning this
invention, FIG. 2 is a cross section of the speaker integrated type display apparatus after an
assembly. FIG. 3 is a longitudinal sectional view of the speaker integrated display device after
assembly. 2 shows a cross section of a substantially central portion, and FIG. 3 shows a vertical
cross section of the arrangement position of the exciter 2.
[0034]
Referring to FIGS. 1 to 3, the front exterior cover 5 is provided with an opening 51 having
substantially the same size as the display 8 of the display module (liquid crystal module etc.) 6,
and the back is an opening The display module 6 is attached in a state where the display unit 51
and the display unit 8 coincide with each other. In the present embodiment, the front exterior
cover 5 is provided with a convex portion 11 in the forward direction in order to make the
mounting position of the display unit 8 as forward as possible, and the display module 6 is
mounted here. There is.
[0035]
An opening 10 slightly larger than the opening 51 is provided in the hollow panel plate 1 serving
as the diaphragm, and the exciter 2 is provided at approximately the central portion of the left
side and right side of the hollow panel plate 1. Each piece is fixed by an adhesive or the like.
Further, the center removal panel plate 1 is fixed to the front surface side of the front exterior
cover 5 with an adhesive or the like via the frame-shaped foam cushion 3 in a state where the
opening 10 and the opening 51 are aligned. The exciter 2 is fixed to the surface side of the front
exterior cover 5 with an adhesive or the like via the foam cushion 4.
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[0036]
In the present embodiment, instead of the transparent panel plate 1a covering the entire display
unit 8 of the display module 6, the hollow panel plate 1 having the opening 10 is used as a
diaphragm, so the display unit 8 of the display module 6 It will be exposed to the outside.
Therefore, even if dirt adheres to the display unit 8, the user can easily wipe the dirt, etc., so the
dustproof gasket 9 and the dustproof net 7 in the conventional example of FIG. 21 become
unnecessary. In the present embodiment, as shown in FIG. 2, the front exterior cover 5 is
provided with the convex portion 11 to the front, and the display module 6 is mounted there, but
as shown in FIG. The display module 6 may be mounted on the flat edge 17 of the front exterior
cover 5. In this case, the installation space of the hollow panel 1 is not reduced by the convex
portion 11. Therefore, the width of the hollow panel 1 serving as the diaphragm is enlarged as
compared with FIG. It is advantageous in securing sound performance.
[0037]
Description of Operation of Embodiment Next, the operation of this embodiment will be
described.
[0038]
The exciter 2 vibrates according to an audio signal input from an amplifier (not shown) and
causes the hollow panel plate 1 to bend.
As a result, a sound corresponding to the audio signal is output from the hollow panel 1. Here,
even if it is the conventional transparent panel board 1a or the hollow panel board 1 of the
present embodiment, the area mainly producing sound is the periphery of the exciter 2, so the
present embodiment Even if the hollow panel board 1 is used as in the above, practically
sufficient sound quality can be obtained. Further, in the present embodiment, since the sound is
mainly produced on the left side and the right side of the hollow panel 1 and no sound is
produced at the central portion, the conventional speaker integrated type in which the entire
surface of the transparent panel 1a is vibrated. It is possible to obtain a higher stereo effect than
the display device.
[0039]
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[Effects of the First Embodiment] According to the present embodiment, the following effects can
be obtained.
[0040]
The first effect is that the visibility is improved.
The reason is that the hollow panel plate 1 having the opening 10 is used as a diaphragm of a
flat speaker. That is, in the prior art, since the image is viewed through the transparent panel
plate 1a serving as the diaphragm, the background is reflected on the transparent panel plate 1a
and the visibility is poor. On the other hand, in the present embodiment, the hollow panel plate 1
having the opening 10 is used as a diaphragm, and an image displayed on the display module 6
can be directly viewed through the opening 10, There is no reflection and visibility is improved.
[0041]
The second effect is that manufacturability is improved. The reason is that the hollow panel plate
1 having the opening 10 is used as a diaphragm of a flat speaker. That is, in the prior art, in
order to prevent foreign matter mixing into the inside of the transparent panel plate 1a, the
assembly operation in the dustproof booth is compelled, and the dust removal operation to each
part also takes a corresponding time. Since this also requires inspection of foreign matter
contamination after assembly, it has a great impact on manufacturability. On the other hand, in
the present embodiment, the hollow panel plate 1 having the opening 10 is used as a diaphragm,
and the display unit 8 of the display module 6 is exposed to the outside, so dirt on the display
unit 8 is easily removed. be able to. Therefore, it is possible to eliminate the need for all the
production facilities, manufacturing processes, and inspection processes required for the
prevention of contamination, and to achieve a significant improvement in productivity as
compared with the prior art, and at the same time secure stable quality. It becomes easy.
[0042]
The third effect is that the cost of parts is reduced. The reason is that the hollow panel plate 1
having the opening 10 is used as a diaphragm of a flat speaker. That is, in the prior art, it is
necessary to provide the dustproof gasket 9 and the dustproof net 7 in order to prevent the
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display module 6 from being contaminated. On the other hand, in the present embodiment, the
display unit 8 of the display module 6 is exposed to the outside, and even if the display unit 8 is
contaminated, it can be easily removed, so the dustproof gasket 9 and the dustproof net 9 are It
becomes unnecessary and as a result reduces the cost of parts. Furthermore, in the prior art, as
the transparent panel plate 1a, an expensive material is used as a result of finding a high quality
material free from contamination and the like with excellent optical performance for securing
visibility. In terms of form, there is no problem in terms of function and appearance even if using
an inexpensive material with low rank, and significant cost reduction is possible.
[0043]
The fourth effect is that the heat generation problem of the display panel can be eliminated. The
reason is that the hollow panel plate 1 having the opening 10 is used as a diaphragm of a flat
speaker. That is, in the prior art, it is difficult to cope with the increase in the size of the display
module, that is, the amount of heat generation, because the heat generated in the display module
6 is stored inside the transparent panel plate 1a. On the other hand, in the present embodiment,
since the display unit 8 of the display module 6 is open to the outside, sufficient heat dissipation
can be ensured, and it is possible to cope with a large display.
[0044]
The fifth effect is that high stereo effects can be obtained. The reason is that the inside-out panel
board 1 having the opening 10 is used as a diaphragm of a flat speaker, and the first and second
exciters 2 for vibrating the left side and the right side of the inside-out panel board 1 are
provided. It is. That is, since a sound is generated on the left side and the right side of the hollow
panel 1 and no sound is generated in the central portion, a high stereo effect can be obtained.
[0045]
Second Embodiment Next, a second embodiment of the speaker integrated display device
according to the present invention will be described. In this embodiment, it is difficult to generate
a buzzing noise (resonant noise of components of the apparatus or abnormal noise generated by
collision of components) by making it difficult for the vibration of the exciter to be transmitted to
the front exterior cover. It is characterized by
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[0046]
[Description of Configuration of Second Embodiment] FIG. 5 is an exploded perspective view of a
second embodiment of the speaker integrated display device according to the present invention,
and FIG. 6 is a longitudinal sectional view of the speaker integrated type display device after
assembly. FIG. 6 shows a longitudinal cross section of the portion where the exciter 2 is disposed.
Further, in FIG. 5 and FIG. 6, the same reference numerals as in FIG. 1 to FIG.
[0047]
5 and 6, one side of exciter 2 is fixed to fixing piece 12 with adhesive or the like through foam
cushion 3, and the other side of exciter 2 is a hollow panel with adhesive or the like. The fixed
piece 12 is fixed to the back surface of the plate 1, and the fixing piece 12 is fixed to the back
surface of the hollow panel plate 1 by an adhesive or the like via the foam cushion 13. In the
present embodiment, one fixed piece 12 is fixed to each of the left side and the right side of the
hollow panel 1.
[0048]
The hollow panel board 1 having the opening 10 is fixed to the surface side of the front exterior
cover 5 with an adhesive or the like via a frame-like foam cushion 3. An opening 52 slightly
larger than the fixed piece 12 is provided in a portion facing the fixed piece 12 on the left side
and the right side of the front outer cover 5 so that the fixed piece 12 does not contact the front
outer cover 5 It has become. Therefore, in the present embodiment, the path through which the
vibration of the exciter 2 is transmitted to the front exterior cover 5 is only the path via the foam
cushion 3.
[0049]
Further, the display module 6 is fixed to the back surface side of the front exterior cover 5 having
the opening 51 as in the first embodiment. In the present embodiment, the exciter 2 is fixed to
the left side and the right side of the hollow panel 1 but, as shown in FIG. good. That is, in
addition to the left and right channels, a center channel may be provided. Furthermore, the
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number of exciters 2 attached to the hollow panel 1 may be increased to achieve multichanneling, or a plurality of exciters 2 may be associated with the same channel to achieve high
output. Further, in the first embodiment, three or more exciters 2 may be attached to the hollow
panel plate 1.
[0050]
[Description of Operation of Second Embodiment] Also in this embodiment, as in the first
embodiment, the exciter 2 is vibrated by an electric signal output from an amplifier (not shown),
and the vibration is generated by the vibration. Sound is generated by causing the hollow panel
plate 1 to bend. FIG. 8 shows measurement data of frequency characteristics of the speaker
integrated display device according to the present embodiment. In FIG. 8, the horizontal axis
represents frequency, and the vertical axis represents sound pressure. As can be seen with
reference to FIG. 8, the speaker integrated display device according to the present embodiment
can obtain excellent sound quality with less variation in sound pressure at each frequency. The
same frequency characteristic can be obtained also in the speaker integrated display device
according to the first embodiment.
[0051]
[Effects of the Second Embodiment] According to the present embodiment, the following effects
can be obtained in addition to the effects of the first embodiment. In the first embodiment, there
are two paths through which the vibration of the exciter 2 is transmitted to the front exterior
cover 5: a path through the foam cushion 3 and a path through the foam cushion 4; In this mode,
since only the path through the foam cushion 3 is provided, the vibration of the exciter 2 is less
likely to be transmitted to the front exterior cover 5, and as a result, it is possible to make it less
likely to generate rattling noise.
[0052]
Third Embodiment Next, a third embodiment of a speaker integrated display device according to
the present invention will be described. The present embodiment is characterized in that the
vibration of the exciter 2 is less likely to be transmitted to the front exterior cover by using a
screw, a grommet and a collar instead of using the frame-shaped foam cushion 3.
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[0053]
[Description of Configuration of Third Embodiment] FIG. 9 is an exploded perspective view of a
third embodiment of the speaker integrated display device according to the present invention,
and FIG. 10 is a hollow panel 1 and a front exterior cover 5 It is sectional drawing of the fixed
part of. 9 and 10, the same reference numerals as those in FIGS. 5 and 6 denote the same parts.
[0054]
9 and 10, holes 91 are formed at the four corners of the hollow panel 1 and screw holes 92 are
formed in the portion of the front exterior cover 5 facing the holes 91. As shown in FIG.
[0055]
The cylindrical grommet 15, which is a molded product of a soft resin, is inserted into the hole
91, and the screw 14 is inserted into the hollow portion of the grommet 15.
Further, a collar 16 which functions as a spacer for preventing the grommet 15 from being
crushed by screwing is inserted between the head portion of the screw 14 and the grommet 15.
The hollow panel plate 1 and the front exterior cover 5 are fixed by screwing the tip of the screw
14 in the above-mentioned state and the screw hole 92.
[0056]
Also in the present embodiment, the exciter 2 is fixed to the back surface side of the hollow panel
plate 1 by the fixed piece 12 as in the second embodiment, so the vibration of the exciter is
transmitted to the front exterior cover 5 The path is only the path through the screw 14.
[0057]
[Effect of Third Embodiment] According to the present embodiment, in addition to the effects of
the first embodiment, the following effects can be obtained.
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In the first embodiment, there are two paths through which the vibration of the exciter 2 is
transmitted to the front exterior cover 5: a path through the foam cushion 3 and a path through
the foam cushion 4; In this mode, since only the path through the screw 14 is provided, the
vibration of the exciter 2 is less likely to be transmitted to the front exterior cover 5, and as a
result, it is possible to make it less likely to generate a rattling noise.
[0058]
Fourth Embodiment Next, a fourth embodiment of the speaker integrated display device
according to the present invention will be described. The present embodiment is characterized in
that the frequency characteristics are improved by using a vibration damping plate, a sound
absorbing material, and the like.
[0059]
[Description of Configuration of Fourth Embodiment] FIG. 11 is a front view of the periphery of
the exciter 2 of the speaker integrated display device according to the present embodiment, FIG.
12 is a longitudinal sectional view thereof, and FIG. FIG. 14 is a cross-sectional view of a portion
of FIG.
[0060]
Referring to FIGS. 11 to 14, one side of the exciter 2 is fixed to the back side of the hollow panel
1, and the other side is fixed to the front side of the front exterior cover 5.
A damping plate 24 formed of a foam cushion or the like is fixed by an adhesive or the like
around the attachment portion of the exciter 2 on the back surface of the hollow panel plate 1. A
hole 25 is formed in a portion of the damping plate 24 corresponding to the exciter 2 so that the
exciter 2 is in direct contact with the hollow panel plate 1.
[0061]
One surface of a frame-like foam cushion 3 is fixed by an adhesive or the like to the outer
peripheral portion on the back surface side of the hollow panel panel 1 by an adhesive or the
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like. The other surface of the body cushion 3 is fixed by an adhesive or the like. In addition, a
part of the foam cushion 3 (a portion near the fixed position of the exciter 2) is replaced with the
auxiliary tamper 22. The auxiliary tamper 22 is realized by a (hard) foam cushion having a larger
elastic modulus than the foam cushion 3.
[0062]
In addition, on the inner peripheral portion of the side in contact with the exciter 2 in the inner
peripheral portion on the back surface side of the hollow panel plate 1, one surface of a shield
gasket 27 of the same material as the foam cushion 3 is adhered The other surface of the shield
gasket 27 is fixed to the surface of the front exterior cover 5 by an adhesive or the like. In
addition, a part of the shield gasket 27 (a part near the fixed position of the exciter 2) is replaced
with the auxiliary damper 23.
[0063]
Further, a sound absorbing material 26 is disposed in a space portion formed by the hollow panel
plate 1, the shield gasket 27, the front exterior cover 5 and the foam cushion 3. In the present
embodiment, the sound absorbing material 26 is fixed to the surface side of the front exterior
cover 5 by an adhesive or the like.
[0064]
The auxiliary tampers 22 and 23 and the vibration damping plate 24 control vibration damping,
and the sound absorbing material 26, the foam cushion 3 and the shield gasket 27 react between
the hollow panel plate 1 and the front exterior cover 5. Reduce the influence of sound. These
functions improve the frequency characteristics. The measurement result of the frequency
characteristic of the speaker integrated display apparatus concerning this Embodiment is shown
in FIG. As compared with the frequency characteristics of the speaker integrated type display
device according to the second embodiment shown in FIG. 8, the frequency characteristics of the
speaker integrated type display device according to the present embodiment show variation in
sound pressure at each frequency. And the frequency characteristics are improved. In the present
embodiment, the exciter 2 is fixed to the back surface of the hollow panel 1 and the surface of
the front exterior cover 5, but as shown in FIGS. 5 and 6, the fixed piece 12 is used. You may
make it fix only to the back surface of the hollow panel board 1.
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[0065]
[Effects of Fourth Embodiment] According to the present embodiment, it is possible to improve
the frequency characteristics in addition to the effects of the speaker integrated display device
according to the first embodiment. The effect can be obtained. The reason is that the auxiliary
dampers 22 and 23, the damper plate 24, the sound absorbing material 26, and the shield gasket
27 are provided.
[0066]
Fifth Embodiment Next, a fifth embodiment according to the present invention will be described.
The present embodiment is characterized in that the front exterior cover itself is used as a
diaphragm.
[0067]
[Description of Configuration of Fifth Embodiment] FIG. 16 is an exploded perspective view of a
fifth embodiment of the speaker integrated display device according to the present invention,
and FIG. 17 is a longitudinal sectional view thereof. FIG. 17 shows a longitudinal cross section of
the portion where the exciter 2 is disposed.
[0068]
Referring to FIGS. 16 and 17, in the speaker integrated display device of the present
embodiment, the hollow panel plate 1 used as the diaphragm in the first to fourth embodiments
is not provided. In the present embodiment, the front exterior cover 5 itself having a large
opening 51 substantially the same as the display unit of the display module 6 is used as a
diaphragm. Therefore, while fixing the fixed piece 12 to which the one surface of the exciter 2
was fixed by the adhesive etc. via the foam cushion 4 to the back surface of the front exterior
cover 5 via the foam cushion 13 with the adhesive etc. The other surface of the exciter 2 is fixed
to the back surface of the front exterior cover 5 with an adhesive or the like.
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[0069]
[Effects of Fifth Embodiment] According to the present embodiment, in addition to the effects of
the first embodiment, it is possible to obtain an effect that the speaker integrated display device
can be economically configured. it can. The reason is that the exciter 2 is fixed to the front
exterior cover 5 and the front exterior cover 5 is used as a diaphragm of a flat speaker.
[0070]
Sixth Embodiment Next, a sixth embodiment according to the present invention will be described.
The present embodiment is characterized in that a piezoelectric element is used as an exciter.
[0071]
[Description of Configuration of Sixth Embodiment] FIG. 18 is an exploded perspective view of a
sixth embodiment of the loudspeaker integrated display device according to the present
invention, and FIG. 19 is a longitudinal sectional view thereof.
[0072]
Referring to FIGS. 18 and 19, the speaker integrated display device of the present embodiment
includes a rear exterior cover 33, a control substrate 32, an internal frame 29, a display module
6 such as a liquid crystal module, and a dustproof gasket for a frame. 30, a dustproof gasket 31
for display module, an exciter 28 made of a piezoelectric element, a front exterior cover 5 having
an opening 51, a foam cushion 3, a hollow panel plate 1 having an opening 10, and a cover fixing
It is composed of a screw 34.
[0073]
Referring to FIGS. 18 and 19, the hollow panel plate 1 is fixed to the front side of the front
exterior cover 5 via a frame-shaped foam cushion 3.
The hollow panel plate 1 and the front exterior cover 5 are provided with openings 10 and 51
substantially the same size as the display unit of the display module 6.
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[0074]
An exciter 28 formed of a piezoelectric element is fixed to the back surface of the hollow panel
plate 1 by an adhesive or the like.
The display module 6 is fixed to the back surface of the front exterior cover 5 via the dustproof
gasket 31 for the display module in a state where the display unit thereof matches the opening
51. The other surface of the display module 6 is fixed to the inner frame 29. The inner frame 29
is fixed to the back surface of the front exterior cover 5 via a frame dustproof gasket 30. In
addition, a control board 32 is attached to the back surface of the inner frame 29. The front
exterior cover 5 is fixed to the rear exterior cover 33 by a cover fixing screw 34.
[0075]
[Effects of Sixth Embodiment] According to the present embodiment, in addition to the effects of
the first embodiment, it is possible to obtain the effect that the speaker integrated display device
can be miniaturized. Can. The reason is that the piezoelectric element is used as an exciter. As
described above, according to the present embodiment, since the speaker integrated display
device can be miniaturized, it is suitable to be applied to a portable information terminal such as
a portable telephone.
[0076]
[Other Embodiments] The present invention is not limited to the above-described embodiments,
and the respective embodiments can be combined or various modifications can be made. For
example, a transparent electrode may be disposed on the front surface of the display unit 8 of
the display module 6 to configure a touch panel. Further, a slit may be provided in a part of the
hollow panel plate 1. For example, as shown in FIG. 20 (a), a slit 101 is provided on the upper
side of the hollow panel 1, or as shown in FIG. 20 (b), the slits 101 and 102 are on the upper and
lower sides of the hollow panel 1, respectively. May be provided.
[0077]
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It can be used for mobile devices such as mobile phones.
[0078]
FIG. 1 is an exploded perspective view of a first embodiment of a speaker integrated display
device according to the present invention.
It is a cross-sectional view of 1st Embodiment of the speaker integrated display apparatus
concerning this invention. FIG. 1 is a longitudinal sectional view of a first embodiment of a
speaker integrated display device according to the present invention. FIG. 7 is a cross-sectional
view showing an example of mounting the display module 6 on the front exterior cover 5; It is a
disassembled perspective view of 2nd Embodiment of the speaker integrated display apparatus
concerning this invention. It is a longitudinal cross-sectional view of 2nd Embodiment of the
speaker integrated display apparatus concerning this invention. It is a figure which shows an
example of the attachment position of the exciter 2. FIG. It is a figure which shows the
measurement result of the frequency characteristic of 2nd Embodiment of the speaker integrated
display apparatus concerning this invention. It is a disassembled perspective view of 3rd
Embodiment of the speaker integrated display apparatus concerning this invention. It is sectional
drawing of 3rd Embodiment of the speaker integrated display apparatus concerning this
invention. It is a front view around the exciter 2 of 4th Embodiment of the speaker integrated
display apparatus concerning this invention. It is a longitudinal cross-sectional view of 4th
Embodiment of the speaker integrated display apparatus concerning this invention. FIG. 12 is a
cross-sectional view of a portion of FIG. FIG. 12 is a cross-sectional view of a portion of FIG. It is a
figure which shows the measurement result of the frequency characteristic of 4th Embodiment of
the speaker integrated display apparatus concerning this invention. It is a disassembled
perspective view of 5th Embodiment of the speaker integrated display apparatus concerning this
invention. It is a longitudinal cross-sectional view of 5th Embodiment of the speaker integrated
display apparatus concerning this invention. It is a disassembled perspective view of 6th
Embodiment of the speaker integrated display apparatus concerning this invention. It is a
longitudinal cross-sectional view of 6th Embodiment of the speaker integrated display apparatus
concerning this invention. It is not showing an example of the hollow panel board 1 which put
the slit. It is a disassembled perspective view of the conventional speaker integrated type display
apparatus. It is a cross-sectional view of the conventional speaker integrated display apparatus. It
is a figure which shows the measurement result of the frequency characteristic of the
conventional speaker integrated display apparatus.
Explanation of sign
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[0079]
DESCRIPTION OF SYMBOLS 1 ... Open panel panel 10 ... Opening part 1a ... Transparent panel
board 2 ... Exciter 3 ... Foam cushion 4 ... Foam cushion 5 ... Front exterior cover 51 ... Opening
part 52 ... Opening part 6 ... Display module 7 ... Dustproof net 8 ... display portion 9 ... dustproof
gasket 11 ... convex shape portion 12 ... fixed piece 13 ... foam cushion 14 ... screw 15 ... grommet
16 ... color 19 ... lower opening portion 91 ... hole 92 ... screw hole 22 ... auxiliary damper 23 ...
auxiliary damper 24 ... damping plate 25 ... hole 26 ... sound absorbing material 27 ... shield
gasket 29 ... internal frame 30 ... dustproof gasket for frame 31 ... dustproof gasket for display
module 32 ... control board 33 ... back exterior cover 34 ... cover fixing screw 101 ... slit 102 ...
slit
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