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JP2011138020

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DESCRIPTION JP2011138020
The present invention provides a flat speaker type LED display device improved such that a loud
sound can be generated while being a thin LED display device, and various information can be
transmitted more reliably. A flat speaker type LED display device according to the present
invention has a structure in which a substrate body itself generates a sound by directly vibrating
a substrate body of an LED substrate. Furthermore, since the peripheral portion of the substrate
body is supported by the frame-shaped support, the amplitude of the central portion of the
substrate body can be increased, and a loud sound can be generated. Furthermore, by arranging
the component parts of the LED drive circuit in the peripheral portion of small amplitude in the
substrate body and arranging the plurality of LEDs in the central portion of the substrate body
with large amplitude, damage due to vibration can be prevented. . [Selected figure] Figure 3
Flat speaker type LED display device
[0001]
The present invention relates to a flat speaker type LED display device, and more particularly, to
a technique for improving a flat speaker such that a loud sound can be generated as a flat LED
display device.
[0002]
In the past, for buildings used by an unspecified number of people, medium-sized and large-scale
buildings, underground buildings, etc., installation of guidance lights is obligated by the Fire
Service Law, and people are It is designed to show and guide the direction to evacuate.
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However, a general guide light only displays a predetermined pattern brightly using lighting such
as a fluorescent lamp or a light bulb, and if the view is blocked due to the generation of smoke
accompanying a fire, it becomes impossible to visually recognize, and the direction to evacuate
There is a risk of losing sight of
[0003]
Therefore, “a light emitting display device having a speaker function” disclosed in Patent
Document 1 below has both a function as a guide light and a function as a speaker, and can
provide information by sight and hearing. When the structure is outlined with reference to FIG.
10, an LED panel, an organic or inorganic EL panel, or a light emitter 3 which is a liquid crystal
panel is attached to the front side of the diaphragm 2 vibrated by the vibrator 1 with an adhesive
or the like. In addition, it has a structure protected by the surface layer material 4. As a result,
since a sound can be generated from the diaphragm 2 while displaying a design on the light
emitter 3, it is possible to notify evacuation information etc. not only from sight but also from
hearing in an emergency such as fire occurrence. it can.
[0004]
JP, 2005-189464, A
[0005]
However, the diaphragm 2 of the "light emitting display device having a speaker function"
disclosed in the above-mentioned Patent Document 1 is made by laminating aluminum thin
plates 2a and 2b on the front and back of the aluminum honeycomb panel. It has a structure that
enhances its rigidity.
The vibrator 1 has a structure in which it is integrally fixed to the back surface of the diaphragm
2 by fixing means such as screws. As a result, even if the vibrating plate 2 is vibrated by the
vibrator 1, it is not possible to generate a loud sound.
[0006]
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Further, since the honeycomb panel is used as the diaphragm 2, the dimension in the thickness
direction can not be reduced. Thus, the light emitting display device may not be able to be
mounted in the space where the existing guide light is installed.
[0007]
Therefore, it is an object of the present invention to solve the problems of the above-mentioned
prior art and to generate a loud sound while using a thin LED display device so that various
information can be transmitted more reliably. It is an object of the present invention to provide
an improved flat speaker type LED display device.
[0008]
A first invention for solving the above-mentioned problems comprises: an LED substrate having
an LED mounted on the surface thereof, a frame-like support for supporting the peripheral
portion of the substrate body among the LED substrates, and the substrate body A flat speaker
type LED display device comprising: vibration means for vibrating to generate sound.
In addition, it is preferable to use a thin metal plate like an aluminum substrate as a board |
substrate body of LED board.
[0009]
That is, the flat speaker type LED display device of the first invention is obtained by simply
superposing the diaphragm 2 and the light emitter 3 as in the “light emitting display device
having a speaker function” disclosed in the above-mentioned Patent Document 1 Instead, the
substrate body itself generates a sound by vibrating the substrate body of the LED substrate
directly. Furthermore, since the peripheral portion of the substrate main body of the LED
substrate is supported by the frame-like support, the amplitude of the central portion of the
substrate main body can be increased, whereby the substrate main body generates a loud sound.
be able to.
[0010]
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At this time, since a large number of LEDs and IC chips of drive circuits are surface mounted on
the surface of the substrate body of the LED substrate, the LEDs and the IC chip may be damaged
or dropped when the substrate body is vibrated. Conceivable. However, by improving the surface
mounting technology, it has become possible to continue generating loud sound for a long time.
[0011]
Therefore, according to the first aspect of the invention, it is possible to guide the direction to be
evacuated by the loud sound while clearly indicating the direction to be evacuated by the LED
substrate in an emergency such as a fire or the like. People can be reliably guided even when the
view is blocked due to the occurrence of In addition, since the thin substrate itself of the LED
substrate is a structure that generates sound, the dimension in the thickness direction can be
reduced, and the device of the present invention can be used in a narrow space where existing
guide lights are installed. It can be easily installed.
[0012]
Further, according to a second invention for solving the above-mentioned problems, there is
provided a diaphragm having a rim supported by a frame-like support, a vibrating means for
vibrating the diaphragm to generate sound, and the diaphragm A flat speaker type LED display
device comprising: an LED substrate attached to the front side of the LED substrate, wherein the
LED is mounted on the front surface of the LED substrate.
[0013]
That is, the flat speaker type LED display device according to the second invention is a
diaphragm 2 of a honeycomb structure having a high rigidity but a large thickness, like the
“light emitting display device having a speaker function” disclosed in Patent Document 1
above. It is a structure which vibrates the thin diaphragm which supported the peripheral part by
the frame-like support body rather than making it vibrate and generate a sound.
As a result, the amplitude of the central portion of the diaphragm can be increased, and this
diaphragm can generate a loud sound. At this time, the substrate body of the LED substrate to be
attached to the front side of the diaphragm is preferably made of a flexible material such as a
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thin plate of synthetic resin such as phenol, epoxy or polyimide, or a glass composite material.
[0014]
In the flat speaker type LED display device of the second invention, it is preferable to interpose a
layer of a soft polymer material between the surface of the diaphragm and the back surface of
the LED substrate. Thereby, the resonance peak value generated between the diaphragm and the
LED substrate can be buffered to prevent the LED substrate from being damaged. As the layer of
the soft polymer material, an adhesive or adhesive having a property of not completely
solidifying, or a double-sided pressure-sensitive adhesive tape having elasticity using a foam as a
base material can be used. Some double-sided pressure-sensitive adhesive tapes have
irregularities on the surface of the pressure-sensitive adhesive layer when the release paper is
removed, thereby improving air leakage at the time of application, and as described later, Since
the generation can be suppressed, it is effective for preventing the volume reduction of the sound
generated by the diaphragm.
[0015]
In the flat speaker type LED display device according to the second aspect of the present
invention, the substrate of the LED substrate is provided to discharge air contained between the
polymer material layer and the diaphragm when the layer is brought into close contact with the
surface of the diaphragm. Preferably, a plurality of through holes are provided through the main
body. Thus, the air (air entrapment) enclosed between the layer of the polymer material and the
surface of the diaphragm can be discharged to the outside through the through hole provided in
the substrate main body. It is possible to prevent the volume reduction of the sound generated by
the board.
[0016]
On the other hand, in the first and second inventions, preferably, the vibration means is
supported by the frame-like support. That is, the “light emitting display device having a speaker
function” disclosed in Patent Document 1 has a structure in which the vibrator 1 is fixed to the
back surface of the diaphragm 2 having a honeycomb structure by a fixing means such as a
screw. As a result, in addition to the inability to vibrate the diaphragm 2 efficiently by the
vibrator 1, the vibrator 1 itself becomes a mass, and the volume of the sound generated by the
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diaphragm 2 is reduced. On the other hand, in the first and second inventions, since the vibration
means is supported by the frame-like support, not only the substrate body or the diaphragm of
the LED substrate can be efficiently vibrated, but also the substrate Without increasing the
weight of the main body or the diaphragm, a loud sound can be generated by the substrate main
body or the diaphragm.
[0017]
Furthermore, in the first and second inventions, the LED substrate is arranged with the
components of the LED drive circuit in the peripheral portion of the substrate body, and a
plurality of LEDs are arranged in the central portion of the substrate body. Is preferred. That is,
in the first aspect of the invention, since the peripheral portion of the LED substrate is supported
by the frame-like support, the amplitude of the peripheral portion of the substrate main body can
be reduced. In the second aspect of the invention, since the peripheral portion of the diaphragm
is supported by the frame-like support, the amplitude of the peripheral portion of the diaphragm
and hence the peripheral portion of the LED substrate attached to the front side of the
diaphragm is reduced. can do. At this time, by arranging components of the LED drive circuit
such as an IC chip at the peripheral portion of the LED substrate, it is possible to reliably prevent
damage of these components due to vibration.
[0018]
Furthermore, 3rd invention which solves said subject is a method of manufacturing the flat
speaker type LED display apparatus of 2nd invention mentioned above, and adheres the
periphery of the said diaphragm to the said frame-like support body. The LED substrate is
attached to the front side of the diaphragm through the layer of the polymer material, and a
needle-like member is inserted through the through hole formed in the substrate body of the LED
substrate to form the polymer material. By forming holes in the layer, the air contained between
the layer of the polymeric material and the surface of the diaphragm is discharged. Thus, the air
contained between the layer of the polymer material and the surface of the diaphragm can be
discharged to the outside through the through hole formed in the substrate main body, thereby
generating the diaphragm. The sound volume reduction can be reliably prevented.
[0019]
According to the present invention, it is possible to provide a flat speaker type LED display device
improved such that a loud sound can be generated while being a thin LED display device, and
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various information can be transmitted more reliably. Can.
[0020]
BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the flat speaker type
LED display apparatus of 1st Embodiment.
FIG. 2 is an exploded perspective view of the device shown in FIG. The front view which shows
the LED board shown in FIG. FIG. 2 is a cross-sectional view of an essential part of the device
shown in FIG. The perspective view which shows the action | operation of the flat speaker type
LED display apparatus of 1st Embodiment. The perspective view which shows the action |
operation of the flat speaker type LED display apparatus of 1st Embodiment. The disassembled
perspective view of the flat speaker type LED display apparatus of 2nd Embodiment. The
principal part sectional view of the device shown in FIG. Sectional drawing which shows the state
which discharges | emits air via the through-hole provided in the board | substrate body. The
figure which shows typically the structure of the apparatus currently disclosed by the said patent
document 1. FIG.
[0021]
Hereinafter, each embodiment of the flat speaker type LED display device of the present
invention will be described in detail with reference to FIGS. 1 to 9. In the following description,
the same parts will be denoted by the same reference numerals and redundant description will be
omitted.
[0022]
First Embodiment First, the flat speaker LED display device according to the first embodiment
will be described with reference to FIGS. 1 to 6.
[0023]
As shown in FIG. 1 and FIG. 2, the flat speaker type LED display device 100 of the first
embodiment includes the LED substrate 10 on which the LED is mounted, and the periphery of
the substrate body 11 of the LED substrate 10. It comprises a frame-shaped support 20 for
supporting the portion, and an excitation means 30 for directly exciting the substrate body 11 to
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generate a sound.
[0024]
In the LED substrate 10, the substrate body 11 is an aluminum substrate, the IC chip 12 or the
like which is a component of the LED drive circuit is disposed in the peripheral portion 11a, and
a large number of LEDs 13 are disposed in the central portion 11b. The structure is
[0025]
The frame-like support 20 is, for example, made of aluminum die cast, and has a structure in
which the strip-like substrate mounting portion 22 is disposed along the rim 21 of the peripheral
edge and the vibration means 30 is supported by four support arms 23. It has become.
[0026]
As a result, when the peripheral portion 11a of the LED substrate 10 is fixed to the substrate
mounting portion 22 of the frame-like support 20 using a mechanical fastening means such as a
bolt or an adhesive, as shown in FIG. 3 and FIG. Thus, while the component 12 of the LED drive
circuit faces the substrate mounting portion 22 at the peripheral edge of the support 20, a large
number of LEDs 13 face the central opening of the support 20.
[0027]
Therefore, when the substrate main body 11 is vibrated by the vibration means 30, the
amplitude of the peripheral portion 11a of the substrate main body 11 can be reduced, so that it
acts on the relatively large and heavy component 12 of the LED drive circuit. Vibration can be
reduced to surely prevent the damage due to the vibration of these components.
On the other hand, the large number of LEDs 13 disposed at the central portion of the substrate
body 11 are relatively small and lightweight, so even if the amplitude at the central portion of the
substrate body 11 is large, they are easily damaged by vibration. There is nothing to do.
As a result, the amplitude of the central portion of the substrate body 11 can be increased, so
that the substrate body 11 can generate a loud sound.
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[0028]
That is, according to the flat speaker type LED display device 100 of the first embodiment, as
shown in FIG. 5 and FIG. 6, the direction in which the multiple LEDs 13 of the LED substrate 10
should evacuate Because the loud sound generated by the substrate body 11 can guide the user
in the direction to be evacuated while clearly displaying it by visual sense, people are assured
even when the view is obstructed by the generation of smoke You can be guided to
Further, since the thin substrate body 11 itself of the LED substrate 10 is structured to generate
a loud sound, the dimension in the thickness direction can be reduced, and even in a narrow
space where the existing guide light is installed It can be installed easily.
[0029]
Second Embodiment Next, a flat speaker type LED display device according to a second
embodiment will be described with reference to FIGS. 7 to 9.
[0030]
As shown in FIGS. 7 and 8, in the flat speaker type LED display device 200 of the second
embodiment, the diaphragm 40 whose peripheral portion is supported by the frame-like support
20 and the diaphragm 40 are added. The vibration means 30 for generating sound by shaking,
the LED substrate 50 attached to the front side of the diaphragm 40, on which the LED 13 is
mounted, the front surface of the diaphragm 40 and the back surface of the LED substrate 50
And a layer 60 of soft polymeric material interposed therebetween.
[0031]
The LED substrate 50 is a flexible substrate manufactured from a synthetic resin such as phenol,
epoxy, polyimide, etc., or a glass composite material, and the IC chip 12 as a component of the
LED drive circuit is formed on the peripheral portion 51a. It arrange | positions and it becomes a
structure which arrange | positioned several LED13 in the center part 51b.
[0032]
As a result, the peripheral portion of the diaphragm 40 is fixed to the substrate mounting portion
22 of the frame-like support 20 by using mechanical fastening means such as bolts or an
adhesive, etc., and both surfaces based on the foam material. When the LED substrate 50 is
attached to the surface of the diaphragm 40 by the layer 60 of the soft polymer material which is
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an adhesive tape, the component 12 of the LED drive circuit is the periphery of the support 20 as
in the first embodiment described above. A plurality of LEDs 13 face the central opening of the
support 20 while facing the substrate mounting part 22 of the part.
[0033]
At this time, as shown in FIG. 9 (a), when air stagnation A is generated between the surface of the
diaphragm 40 and the back surface of the layer 60 of the soft polymer material, as shown in FIG.
9 (b). As described above, by inserting a needle-like tool into a plurality of through holes 52
formed in appropriate positions of the substrate main body 51, holes are made in the layer 60 of
the soft polymer material, and the air of the air pool A is It can be discharged outside.
[0034]
That is, the flat speaker type LED display device 200 of the second embodiment is configured to
vibrate the thin diaphragm 40 whose peripheral edge portion is supported by the frame-like
support 20.
As a result, the amplitude of the central portion of the diaphragm 40 can be increased, so that a
large volume of sound can be generated by the diaphragm 40.
[0035]
Further, since the soft polymer material layer 60 is interposed between the front surface of the
diaphragm 40 and the back surface of the LED substrate 50, the peak of resonance generated
between the diaphragm 40 and the LED substrate 50 The values can be buffered to prevent
damage to the LED substrate 50.
[0036]
In addition, since the plurality of through holes 52 are provided through the substrate body 51
of the LED substrate 50, the air present between the surface of the diaphragm 40 and the layer
60 of the soft polymer material is discharged to the outside. The sound volume reduction of the
sound generated by the diaphragm 40 can be reliably prevented.
[0037]
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As mentioned above, although each embodiment of the flat speaker type LED display device of
this invention was described in detail, this invention is not limited by embodiment mentioned
above, It can not be overemphasized that various change is possible.
For example, in the embodiment described above, the guide light installed in a building has been
described as an example, but the image to be displayed is not limited to a still image, and a
moving image can also be displayed. It can also be done.
In addition, signals of images and sounds to be displayed can be transmitted from the outside
using USB, LAN, infrared rays, radio waves, and the like.
[0038]
Reference Signs List 1 vibrator 2 diaphragm 3 light emitter 4 surface layer material 10 LED
substrate 11 substrate main body 12 drive circuit component 13 LED 20 frame-shaped support
21 ridge portion 22 substrate mounting portion 23 support arm 30 vibration means 40
diaphragm 50 LED Substrate 51 Substrate Body 52 Through Hole 60 Layer of Polymer Material
100 Flat Speaker Type LED Display Device of First Embodiment 200 Flat Speaker Type LED
Display Device of Second Embodiment
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