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JP2008042619

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2008042619
An object of the present invention is to provide a highly suitable image display apparatus capable
of obtaining high sound pressure with a small space and free from image distortion. SOLUTION:
A first diaphragm 21b, a second diaphragm 21c, a third diaphragm 21d and a vibration means
23 for oscillating the diaphragms 21 are provided on both sides of the substantially cylindrical
speaker frame 1. The speaker unit 2 is provided so that the left and right diaphragms 21 are
alternately disposed opposite to each other, and the speaker frame 1 is provided with an audio
output hole 11 for outputting sound from between the diaphragms 21 to the speaker frame 1.
Configure. Then, by incorporating the speaker device A configured in this way into the image
display device body consisting of a liquid crystal television, the vibrations generated from each of
the speaker units 2 are offset and the vibrations causing the image disturbance are greatly
reduced. However, high sound pressure can be obtained with space saving. [Selected figure]
Figure 3
Image display device
[0001]
The present invention relates to an image display device provided with a speaker device.
[0002]
A speaker device used for an image display device such as a liquid crystal television or a liquid
crystal panel provided with a speaker device is extremely difficult to incorporate a speaker device
which can obtain high-quality sound because the image display device itself is thin.
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[0003]
Here, even if it is a small aperture, the speaker device is made to enable bass reproduction by
obtaining a sufficient drive range and input resistance, and the speaker device has a top plate
and a bottom plate on the upper and lower portions of the magnet. The upper and lower
magnetic gaps are formed by placing the yoke on the outer periphery, the upper and lower voice
coils are arranged half offset to these magnetic gaps, and the diaphragm is placed on the upper
side of the dual gap voice coil. Some of them are supported by upper and lower dampers (see, for
example, Patent Document 1).
JP-A-9-182188 (page 1, FIG. 1)
[0004]
If the above-described preceding speaker device is incorporated into the above-described image
display device, there is a limit to the improvement of the performance because there is one
diaphragm, which is a member to be made to sound, unlike in the past.
In addition, in the image display device using liquid crystal, the image is easily disturbed when
the device is vibrated. This is because, in the liquid crystal display, electrodes and liquid crystals
are arranged vertically and horizontally in two sheets of glass, and by controlling the signals
input to the respective electrodes, the passage of light is controlled by changing the direction of
liquid crystal molecules. ing. If vibration due to an external force or the like is transmitted to the
glass, the glass itself vibrates, and the distance between the two sheets of glass changes
temporally depending on the part. When this happens, the orientation of the liquid crystal
molecules filled in the glass changes, and as a result, the image is disturbed.
[0005]
Therefore, when a speaker device is incorporated into an image display device using liquid
crystal, by incorporating a high-performance (high sound pressure) speaker device, a large
vibration is given to the liquid crystal display, and the above-mentioned space In addition to the
above problems, it was extremely difficult to incorporate a speaker device capable of obtaining
high-quality sound.
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[0006]
Therefore, the present invention has been made in view of such a situation, and it is an object of
the present invention to provide an image display apparatus capable of solving the abovementioned problems.
[0007]
In order to achieve the above technical problems, the image display apparatus according to the
present invention adopts the following technical means.
That is, the image display device according to the present invention is an image display device
provided with a speaker device, and the speaker device comprises: a diaphragm; and vibration
means engaged with the diaphragm to oscillate the diaphragm. A speaker unit provided is
disposed opposite to both sides of a substantially cylindrical speaker frame, and the speaker
frame is provided with an audio output hole for outputting audio from between the diaphragms
to the outside. It is characterized by becoming.
Further, in the image display device according to the present invention, a plurality of diaphragms
arranged side by side at predetermined intervals in a substantially cylindrical speaker frame are
connected via a vibrating rod, and the plurality of diaphragms Among the above, a speaker unit is
supported by the speaker frame by vibration means engaged with a diaphragm disposed at one
end to excite the diaphragm, and a speaker unit configured such that each diaphragm is tunable
It is an image display apparatus provided with the speaker apparatus opposingly arranged by the
both sides of the speaker flame | frame, Comprising: The said speaker part is opposingly
arranged by the said diaphragm except the said diaphragm with which the said vibration means
was engaged. A communication hole through which the vibration rod is inserted is provided, and
the plurality of diaphragms constituting each of the speaker units are alternately disposed, and
the speakers are provided on both sides of the speaker frame. Parts are opposed, the speaker
frame, characterized in that the sound output holes for outputting sound to the outside from
between the plurality of vibrating plates are arranged alternately is provided.
[0008]
According to the present invention, the speaker unit comprising the diaphragm and the vibration
means engaged with the diaphragm and generating the vibration is formed in a substantially
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cylindrical shape and provided on both sides of the speaker frame provided with the sound
output hole. Since the speaker device is disposed opposite to the speaker device and the speaker
device is incorporated into the image display device, the vibration generated from each of the
speaker portions can be offset to significantly reduce the vibration. Therefore, even if the speaker
device is incorporated into an image display device using liquid crystal, the image is not
disturbed.
[0009]
In addition, since the diaphragms constituting the speaker unit are formed of a plurality of
diaphragms and the diaphragms arranged opposite to each other are alternately arranged, higher
sound pressure can be obtained with space saving, and the speaker units respectively The
vibration generated from the vibration can be offset to greatly reduce the vibration. Therefore, it
is possible to provide an extremely suitable image display device without distortion of the image
while obtaining high sound pressure.
[0010]
Next, an embodiment of an image display apparatus according to the present invention will be
described with reference to the attached drawings. As shown in FIG. 1, the image display device
according to the present embodiment includes a speaker device A including a speaker frame 1
and a pair of speaker units 2 and an image display device main body B including a liquid crystal
television. It is configured to be equipped. In addition, since the image display apparatus main
body B is a thing of a well-known structure, detailed description is abbreviate | omitted and the
speaker apparatus A which is the principal part of this invention is explained in full detail,
referring FIG.2 and FIG.3.
[0011]
The speaker frame 1 is a thin plate member, and both end portions thereof are formed in a
substantially bowl shape, and an intermediate portion is formed in a substantially cylindrical
shape. The speaker frame 1 has a plurality of diaphragms 21 which will be described later
arranged in parallel. The speaker frame 1 has a length such that voices are outputted from the
respective diaphragms 21 to the outside at a required position between the diaphragms 21. A
plurality of sound output holes 11 in the form of holes are opened.
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[0012]
Further, on the inclined surfaces of both end portions formed in a substantially mortar shape,
holes for sound leakage 12 (air holes for venting) of each first diaphragm 21b described later are
provided, and one side formed in a substantially mortar shape On the end face of the end portion,
an opening 13 is provided in which a cylindrical portion 23c described later is loosely inserted.
[0013]
The speaker unit 2 is configured to include a diaphragm 21, a vibrating rod 22, and a vibrating
unit 23.
[0014]
The diaphragm 21 is disposed at a substantially bowl-shaped end of the speaker frame 1, and the
left and right first diaphragms 21b are connected to the substantially bowl-shaped top of the
speaker frame 1 via an edge 21a. The left and right second diaphragms 21c connected to the
inner wall of the speaker frame 1 via the edge 21a at a required distance from the first
diaphragm 21b and the edges at a required distance from the second diaphragm 21c The left
and right third diaphragms 21 d are connected to the inner wall of the speaker frame 1 through
21 a.
[0015]
The arrangement relationship between the left and right first diaphragms 21b, the left and right
second diaphragms 21c, and the left and right third diaphragms 21d is, as illustrated, the left
first diaphragm 21b and the left second diaphragm 21c. Between the second diaphragm 21c on
the left and the second diaphragm 21c on the right between the second diaphragm 21c on the
left and the third diaphragm 21d on the left, and the right A first diaphragm 21b is disposed, and
an insertion hole 21e through which a vibration rod 22 described later is inserted is provided in
each of the left and right second diaphragms 21c and the left and right third diaphragms 21d.
It is preferable that the insertion holes 21e be at one place as close as possible to the center of
the diaphragm 21 as much as possible, but in the case of two places or three places, it is
preferable to arrange them equally. (It is noted that the illustration is described exaggeratingly
and off-center from the case where there is one point near the center).
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The left and right first to third diaphragms 21d are formed flat.
[0016]
The vibrating rod 22 is connected to the first diaphragm 21b and the second diaphragm 21c, and
is connected to the second diaphragm 21c and the third diaphragm 21d. The first diaphragm
21b, the second diaphragm 21c, and the first diaphragm 21b, which are rod-shaped members
installed respectively through the insertion holes 21e formed in the 21c and the third diaphragm
21d, are excited by the vibration unit 23 described later. The three diaphragms 21d are in phase
with each other.
[0017]
The vibrating means 23 includes a tapered portion 23b whose one end on the enlarged diameter
side is connected to the edge 21a of the first diaphragm 21b and a cylindrical portion 23c
connected to the tapered portion 23b, and a taper A damper 23d is provided so as to project
from the intersection of the portion 23b and the cylindrical portion 23c and has an outer
peripheral portion connected to the speaker frame 1, and a voice coil 23e wound around the
outer periphery of the cylindrical portion 23c in a substantially bowl shape. The substantially
cylindrical magnet 23f attached to the end face of the speaker frame 1 is connected to the end
face of the magnet 23f, with the opening 13 provided on the end face of the speaker frame 1
formed on one side as a center A pole 23g having a substantially T-shaped cross section and
loosely inserted in the cylindrical portion 23c, and is disposed opposite to both sides of the
speaker frame 1 ing.
[0018]
The speaker device A configured as described above is installed in an image display device main
body B including a liquid crystal television.
Then, an electric signal (voice signal) is flowed to each of the voice coils 23 e disposed opposite
to cause the voice coil 23 e to move back and forth with respect to the fixed magnet, which
causes the vibration transfer unit 23 a and the first diaphragm 21 b. , The vibration plate 22, the
second diaphragm 21c, and the third diaphragm 21d.
In this manner, each of the first diaphragm 21b, the second diaphragm 21c, and the third
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diaphragm 21d vibrates back and forth to generate a sound, and the generated sound is
externally ringed through the sound output hole 11. Do.
At this time, the vibration generated from each of the speaker portions 2 is offset and the
vibration is significantly reduced.
[0019]
As described above, the speaker device A installed in the image display device according to the
present embodiment includes the first diaphragm 21b, the second diaphragm 21c, and the third
vibration on both sides of the speaker frame 1 formed in a substantially cylindrical shape. The
speaker portions 2 including the plates 21 d and the vibration means 23 for exciting the
diaphragms 21 are disposed to face each other such that the left and right diaphragms 21
alternate, and the speaker frame 1 is placed between the diaphragms 21. Since the sound output
hole 11 for outputting the sound to the outside is provided, high sound pressure can be obtained
in a small space, and the vibration generated from each of the speaker units 2 can be offset to
significantly reduce the vibration. . Therefore, it is possible to provide an extremely suitable
image display device without distortion of the image while obtaining high sound pressure.
[0020]
The specific embodiment has been described above, but the present invention is not limited to
the above embodiment, and it goes without saying that the present invention can be
implemented with appropriate modifications without departing from the scope of the invention.
[0021]
For example, in the present embodiment, the number of left and right diaphragms 21 is three,
but the number of left and right diaphragms 21 is one each, that is, the speaker frame 1 is shared
and the speaker unit 2 is opposed It may be arranged (therefore the insertion hole 21e which
passes the vibration rod 22 becomes unnecessary), and the number of the diaphragms 21 on
either side may be comprised by multiple other than three mentioned above.
Moreover, although the substantially cylindrical thing is illustrated as the speaker frame 1 in this
Embodiment, a rectangular thing may be used.
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[0022]
It is the front view which showed the outline of the image display apparatus concerning this
Embodiment. It is a front view of a speaker apparatus. It is a longitudinal side view the same.
Explanation of sign
[0023]
DESCRIPTION OF SYMBOLS A Speaker device B Image display device main body 1 Speaker frame
11 Audio output hole 12 Sound leakage hole 13 Opening 2 Speaker part 21 Diaphragm 21a
Edge 21b 1st diaphragm 21c 2nd diaphragm 21d 3rd diaphragm 21e insertion hole 22
Vibration rod 23 Vibration means 23a Vibration transmission part 23b Tapered part 23c Tube
part 23d Damper 23e Voice coil 23f Magnet 23g Pole
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