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JP2003330118

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DESCRIPTION JP2003330118
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
audiovisual board capable of writing characters and symbols with a writing instrument and
erasing with an eraser, and more particularly, to a transmissive or reflective screen and speaker.
For a multifunctional board to act as
[0002]
2. Description of the Related Art In the past, writing boards of this type have been essential for
learning, sales administration, meetings, or advertising, messages, postings, etc. especially by a
large number of people. There are many types of development, and for example, a blackboard
using black chalk as a writing instrument (black board), a white board using a general-purpose
writing instrument such as a felt pen (white board), etc. are well known. Although the basic
functions of writing letters and symbols by the character and erasing by the eraser are satisfied,
the color and shape are monotonous, so the decorativeness, designability, etc. are scarce. In order
to solve the problem, in recent years, a plate having an optically excellent effect has been
disclosed which is provided with the function of a blackboard or a white plate.
[0003]
SUMMARY OF THE INVENTION However, merely using them for writing symbols etc. is only a
substitute for blackboards, white boards, etc., and lacks in applicability.
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Therefore, according to the present invention, there is no need to share information display
devices such as a blackboard, an OHP screen, a television receiver, and a speaker used in a
classroom or a conference room, and it is troublesome to individually provide each device.
Reflection and transmission of a plate material that eliminates the inherent defects (such as
environmental deterioration due to white powder on the blackboard, inability to write on the
screen, bulky speakers, etc.) and enables writing and erasing of characters and figures It is
possible to use it as a projection screen and a speaker, and also to use it as a partition material
and a top plate of a table, and to provide an audio-visual function board having decorativeness
and practical functions. The purpose is to integrate many information display means into one
device.
[0004]
SUMMARY OF THE INVENTION In order to solve the above problems, an audiovisual board
according to the present invention forms an image forming surface on one side and performs
surface treatment on the other side to write on a writing tool. -It is characterized by being
comprised by the translucent board material which formed the writing side which enabled
erasure ¦ elimination, and the speaker attached to this board material.
[0005]
In particular, the speaker includes an exciter including a magnetic circuit and a voice coil
attached to a plate material, and the speaker is configured with the plate material as a
diaphragm.
[0006]
In addition, although the above-described audio-visual function board can be used as a
transmissive or reflective screen, a frame is provided as necessary, and the exciter and the
magnetic member are attached to the frame to obtain various effects. Can be provided in various
forms.
[0007]
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an explanatory view of a first embodiment of an audiovisual function board according to
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the present invention, FIG. 2 is an explanatory view of a second embodiment of an audiovisual
function board according to the present invention, and FIG. 3 is an audiovisual function board
according to the present invention FIG. 4 is an explanatory view of a third embodiment, FIG. 4 is
an explanatory view of a fourth embodiment of an audiovisual function board according to the
present invention, and FIG. 5 is an explanatory view of a fifth embodiment of an audiovisual
function board according to the present invention, FIG. 6 is an explanatory view in the case of
using the magnetic body of the audio-visual function board according to the present invention.
[0008]
The embodiment of FIG. 1 shows an embodiment in which it is used as a transmissive screen.
The audio-visual function board is configured to include a transparent and substantially
rectangular plate material 1 such as float glass, and the surface of the plate material 1 is etched
and sandblasted to form a writing surface 1a having an uneven surface. It is formed.
[0009]
In the case where a water-based pen or the like is used depending on the surface roughness and
the shape, the writing surface 1a provided on one surface of the plate 1 common to the following
embodiments, that is, the surface seen from the viewing direction of the audience At the same
time it is possible to write characters and symbols by giving an appropriate sense of pen touch,
and at the same time, it is possible to erase them by a solvent such as a glass cleaner or a
character eraser.
In addition, since the writing surface 1a scatters incident light on the uneven surface, the gloss is
reduced, and the written characters, patterns, and the like are easy to see.
[0010]
On the other side of the plate 1 is formed an imaging surface 1b composed of a coating layer
which has been appropriately colored. This coating layer may be an intermediate layer between
two plate members 1.1, and is formed of, for example, a pigment or the like in which a white to
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light pigment is dispersed in the layer.
[0011]
When the pigment is dispersed in the layer at a low density, a part of the light incident on the
plate member 1 forms an image on the imaging surface 1b, and thus functions as a transmission
type projection screen be able to. In this example, while making a presentation on the front side,
it is possible to check the contents of the projection on the back side, or to create a light
decoration effect on the back side.
[0012]
Further, a frame 2 is provided on the outer periphery of the plate 1, and a small speaker 3
connected to the amplifier 4 is attached to the frame 2.
[0013]
According to the present invention, according to the above configuration, an image is projected
from the projector 5 from the opposite direction of the writing surface 1a of the plate 1 and, at
the same time, an audio is outputted from the speaker 3. You can observe the sound and the
image.
[0014]
The embodiment of FIG. 2 shows another embodiment which is used as a transmission screen in
the same manner as described above, and in particular shows an embodiment in which the plate
1 is disposed on the top plate of the table 6.
In this embodiment, the image projected from the projector 5 is incident from the lower surface
of the plate 1 through the optical device 7, and the user of the table can observe the image on
the desk.
[0015]
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When the pigment which comprises the said imaging surface 1b is very high in light reflectivity,
it can be used as a reflection type screen.
FIG. 3 shows an embodiment used on a wall surface or the like, and FIG. 4 shows a structure
which can be fixed to the wall surface by the magnetic member 8.
[0016]
The speaker 3 according to the present invention adopts a mechanism in which the plate
material 1 is vibrated by the exciter 3a as shown in FIGS. 3 to 4. As a result, since the sound
comes from the plate itself, the direction of the image and the sound generation position become
the same, which brings about the effect of enhancing the realism and three-dimensionality of the
listener, and since it is a flat type speaker, the directivity of the sound is It is possible to exhibit
such effects that the sound can be very small and can be heard from all directions, and the
difference in volume due to the distance from the sound source can be small.
[0017]
The audio-visual function board of the present invention can be configured in various usage
forms. For example, when attached to a wall surface, the plate 1 itself vibrates by the exciter 3a,
so transmission of vibration as shown in FIG. It is preferable to attach a sponge 9 with a space
from the wall in order to improve the performance.
[0018]
Further, the audio-visual function board of the present invention is configured to be attached to
the metallic surface portion using the magnetic member 8.
In this case, as shown in each example of FIG. 6, the magnetic member 8 can be provided entirely
or partially or in a wire mesh type. As is apparent from the above description, the device
according to the present invention is provided with the function of transmitting all the
information by one device, and therefore, like the conventional display of audiovisual
information, In a meeting room or classroom that requires them by using separate and
independent display devices, a blackboard, an OHP screen, a screen of a movie or TV, a speaker,
etc. are placed respectively, resulting in space occupancy and cost increase, etc. There is no
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problem. Specifically, since the screen and the speaker are in the same plane, the entire device
can be made thin and miniaturized, and the maintenance property is excellent, which also
contributes to securing the appearance. In addition, as for the speaker function, since the sound
comes from the plate itself, the direction of the image and the sound generation position become
the same, which brings about an effect of enhancing the presence and the three-dimensional
feeling of the listener. This system has functional advantages such as a very small directivity and
can be heard from all directions, and a small difference in volume due to the distance from the
sound source. In general, the audio-visual function board of the present invention can write
characters and pictures on the projected image, can superimpose visual images, and can also
have complex effects such as functioning as a sound source. It is an excellent invention provided.
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