close

Вход

Забыли?

вход по аккаунту

?

JPH0286396

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPH0286396
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
screen speaker for enlarging sound and displaying an enlarged image by a video projector or the
like. 2. Description of the Related Art In recent years, with the advent of the AV era, video
projectors such as a so-called video projector which expands a TV and video image to a large
screen and enjoys video with great power are becoming widespread. There are two types of
methods of this video projector as a method of projecting on a screen: a transmissive screen
method and a reflective screen method, and the present invention relates to the latter method. If
it is possible to play acoustically with the large screen and realistically play the bass, it is possible
to have an atmosphere like a cinema while staying at home. Conventionally, an image projected
by a video projector is reflected and projected on a screen on the front, but at this time, the
sound is generally reproduced by a speaker placed behind the screen in the case of a movie
theater or the like. Hereinafter, an example of the conventional screen speaker described above
will be described with reference to the drawings. FIG. 3 shows a schematic t--of a conventional
screen speaker. In FIG. 3, 1 is a speaker, 2 is a screen, 3 is a sound wave, 4 is a video projector
16 is an image light and the sound wave generated from the speaker 1 is transmitted to the
viewer via air and the screen 2. The video light 6 is projected from the video projector 4 and the
video is displayed on the screen 2. As the screen 2, generally used is a sheet provided with a light
reflecting layer provided on the surface of a vinyl chloride substrate by aluminum deposition and
further serving as surface protection. SUMMARY OF THE INVENTION However, in the
configuration as described above, when the speaker is too close to the screen or generates a
large volume, the sound pressure from the speaker causes the screen to partially resonate and an
image appears There is a drawback, there is a problem that if you take the speaker back to avoid
it, it can not be used in a place where there is a wide space restriction (general home). SUMMARY
OF THE INVENTION In view of the above problems, the present invention provides a screen
11-05-2019
1
speaker provided with a speaker at the rear of the screen and capable of obtaining a large
powerful video and audio in a small space and performing acoustic processing without any
influence on the video. It is a thing. Means for Solving the Problems In order to solve the above
problems, the screen speaker according to the present invention is provided in front of the
diaphragm of the speaker system from at least one or more polymer foams etc. The braking
screen is formed by laminating the braking material.
Operation In the present invention, according to the above-described configuration, the screen is
formed by forming a control material comprising a polymer foam layer or the like on the back of
the screen so that the screen does not partially vibrate due to sound waves from the speakers at
the back of the screen. The rigidity of the As a result, partial vibration of the screen can be
suppressed even when large-forced sound is output, and defects such as image fluctuations do
not occur, and the screen and the speaker diaphragm can be brought close to each other, and
space can be saved. EXAMPLE A screen speaker according to a first example of the present
invention will be described with reference to the drawings. FIG. 1 is a schematic view of a screen
speaker according to a first embodiment of the present invention. In FIG. 1, 6 is a screen, 7 is a
pressure-sensitive adhesive layer, 8 is a polymer foam laminated on the back side of the screen 6
via a pressure-sensitive adhesive 7. The other case numbers are the same as in the conventional
example. The operation of the screen speaker configured as described above will be described
below. The sound wave 3 generated from the speaker 1 is radiated through the air, the damping
material 8, the adhesive layer 7 and the screen 6. At this time, the screen 6 vibrates due to the
sound wave, but since the screen is reinforced by the three-layer laminate structure of the
adhesive layer 7 and the damping material 8, the screen partially resonates and the whole
surface is not generated. Vibrate together. Moreover, since the screen is a large area, the
amplitude is small and the required sound pressure level can be obtained. Therefore, a clear
image and great powerful sound can be obtained without the generation of light interference
fringes on the screen surface. As described above, according to the present embodiment, by
laminating and reinforcing the damping material 8 on the back surface of the screen 6, partial
resonance is not caused by the sound wave from the speaker 1 at the rear of the screen, and a
clear without fluctuation. While providing an image, it is possible to bring the screen θ and the
speaker 1 behind the screen close to the screen, and also save space. Although urethane resin
foam (50 times foam, thickness ts ttni) is used as the control material 8 here, the same effect can
be obtained even if the material is changed or the expansion ratio and thickness are changed
according to the purpose. It is a thing. For example, any material such as rubber, polymer
elastomer, non-woven fabric and the like that can obtain a braking effect may be used. The
adhesive 7 is also acrylic, but any other adhesive or adhesive may be used as long as the foam
can be fixed to the screen. Furthermore, three layers of the damping material 8 are laminated
here, but any number of layers may be laminated if there are more than one layer, and an
optimum configuration can be selected according to the strength of the screen.
11-05-2019
2
Further, even if the laminate of the damping material 8 is not the entire surface of the screen 6
but is laminated to a part of the screen 6, the reinforcing effect is exhibited and the sb does not
necessarily have to be laminated on the entire surface. Hereinafter, a second embodiment of the
present invention will be described with reference to the drawings. FIG. 2 is a schematic view of a
screen speaker showing a second embodiment of the present invention. In FIG. 2, 9a is a polymer
foam, 9b is a polymer foam having a smaller expansion ratio than the polymer foam 9a, and 9C is
a polymer foam having a smaller expansion ratio than the polymer foam 9b. The other case
numbers are the same as in the first embodiment. The operation of the screen speaker
configured as described above will be described below. The sound wave 3 generated from the
speaker 1 is radiated through the air, the polymer foams 9c, 9b, 9C adhesive layer 7 and the
screen e. At this time, the screen 6 vibrates due to the sound wave, but the pressure-sensitive
adhesive layer 7 and the polymer foam ga, 9b, 9a. Because the screen is reinforced, partial
resonance does not occur and there is no defect such as the image being distorted. In particular,
by increasing the expansion ratio of the polymer foams 9a, 9b and 9a in order from the side
closer to the screen 6, there is an advantage that the strength can be increased with the same
thickness than when foams of all the same expansion ratio are used. It is a certain thing. As
described above, by laminating the polymer foams ga, gb, and 9c such that the expansion ratio
gradually decreases on the back surface of the screen e through the adhesive layer,
reinforcement of the screen 6 can be efficiently performed. Partial resonance of the screen 6 due
to the influence of the sound wave 3 from the speaker 1 can be prevented, and coexistence of a
large sound and a large screen becomes possible. Further, since the speaker 1 can be brought
close to the screen 6, the space can be saved. The material of the polymer foam may be urethane
or the like, and the material may be changed layer by layer if the expansion ratio is gradually
reduced, and the same effect can be obtained. Further, the area to be laminated is not limited to
the entire surface of the screen 6 as in the first embodiment, and may be a part. As described
above, according to the present invention, according to the present invention, the screen is
disposed in front of the speaker diaphragm, and one or more polymer foams are laminated on
the entire surface or a part of the back surface of the screen facing the speaker side. Since the
screen is partially resonated by the sound wave from the speaker placed at the rear, the screen is
not waved and a clear image can be obtained without the fluctuation of the image.
Furthermore, since resonance does not occur when the speaker is brought close to the screen, it
is possible to provide a screen speaker capable of saving space.
[0002]
Brief description of the drawings
11-05-2019
3
[0003]
FIG. 1 is a schematic sectional view of the screen speaker in the first embodiment of the present
invention, FIG. 2 is a schematic sectional view of the screen speaker in the second embodiment of
the present invention, and FIG. FIG.
6 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · polymer foam, 9a · · · · · · polymer foam, 9b · · ·
Polymer foam 9 & polymer foam having a small foaming ratio, 9 C: polymer foam having a
foaming ratio smaller than that of the polymer foam 9 b. Medicinal Figure 6-Screen F-Conspiracy
Conscious Stratum 8-High Te
11-05-2019
4
Документ
Категория
Без категории
Просмотров
0
Размер файла
12 Кб
Теги
jph0286396
1/--страниц
Пожаловаться на содержимое документа