close

Вход

Забыли?

вход по аккаунту

?

JP2000253487

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 JP2000253487
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
flat panel active speaker system provided in various AV devices, personal computers and the like.
[0002]
2. Description of the Related Art Conventionally, in a flat plate speaker of a system in which a flat
plate is driven by a piston, one end of the vibrating plate is supported and the other end is made
free (free end). It is known to lower the resonant frequency of and increase the low frequency
response. In the flat panel speaker, the low frequency reproduction limit is further lowered by
using a method of forcibly fixing a part of the free end of the diaphragm or a method of driving
the diaphragm by a plurality of actuators. It is known to extend to. And, with these technologies,
it is possible to realize a much thinner speaker compared to a normal speaker.
[0003]
However, in the active speaker, the power amplifier and the electric circuit around it are
indispensable, and the arrangement space for these members becomes a factor that hinders the
reduction in thickness of the flat active speaker. It was FIG. 4 is a view showing a configuration
example of a conventional flat plate type active speaker system, FIG. 4 (A) is a front view, and
11-05-2019
1
FIG. 4 (B) is a side view.
[0004]
This example shows a case where a dynamic type unit is used as a drive actuator for vibrating
the diaphragm 12 and the voice coil portion 16 of the actuator unit 14 is bonded to the center
position of the diaphragm 12. The driving actuator has a magnet (not shown) disposed opposite
to the voice coil portion 16 and generates an alternating magnetic field by supplying a frequency
signal to the voice coil portion 16 and causes an interaction with the magnetic field by the
magnet. The vibration plate 12 is to be vibrated. The same effect can be obtained by using a
piezoelectric type actuator or the like as the driving actuator. Further, in this example, the
peripheral portion 12A of the diaphragm 12 is basically free. The speaker unit 10 is configured
by such a diaphragm 12 and the actuator unit 14.
[0005]
On the other hand, in the lower part of the speaker unit 10, an amplifier unit case 22 in which an
electric circuit for driving the actuator unit 14 is housed is configured to also serve as a speaker
stand. The speaker unit 10 is a supporting member on the amplifier unit case 22. 24 is fixed and
constitutes an active speaker system. Thus, if it is going to comprise an active speaker in the state
which open | released the front and back surface of a flat diaphragm, thickness reduction as a
system will become difficult for peripheral parts, such as an electric circuit.
[0006]
In addition, by arranging peripheral parts such as the electric circuit described above to overlap
on the back of the diaphragm, the flat panel speaker has the effect (wide directivity etc.) when
the front and rear surfaces of the diaphragm ring in an open state. Such an arrangement is not
desirable because
[0007]
Therefore, an object of the present invention is to provide a flat-plate type active speaker system
capable of achieving thinning by effectively dispersing the arrangement space of each
component such as an electric circuit for controlling a drive actuator.
11-05-2019
2
[0008]
SUMMARY OF THE INVENTION In order to achieve the above object, the present invention
provides a flat plate type active speaker system having a flat plate type object as a diaphragm,
wherein one or more driving actuators are fixed to the diaphragm. An electric circuit for driving
and controlling the drive actuator, and a circuit component constituting the electric circuit is
mounted on the diaphragm.
[0009]
In the flat plate type active speaker system of the present invention, the drive actuator is driven
and controlled by the electric circuit, and the diaphragm is driven by the operation of the drive
actuator.
And each circuit component which comprises an electric circuit is mounted in the diaphragm.
The diaphragm has a sufficient mounting area, and can arrange the circuit components in a
distributed manner, so that the thinness can be maintained without the speaker system being
bulky due to the arrangement space of the electric circuit as in the prior art.
In addition, since the unit of the electric circuit is not disposed opposite to the diaphragm as in
the prior art, the electric circuit can be disposed without impairing the acoustic characteristics.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the flat panel active speaker
system according to the present invention will be described below. FIG. 1 is a view showing a
configuration example of a speaker system according to a first embodiment of the present
invention, FIG. 1 (A) is a front view, and FIG. 1 (B) is a side view. This example is an example of
the flat speaker unit 110 in which the peripheral portion 112A of the diaphragm 112 is basically
free, and each circuit component constituting an electric circuit or the like on the surface of the
diaphragm 112 on the side of the actuator unit 114. 130 is attached.
[0011]
11-05-2019
3
The diaphragm 112 in this example is made of a wiring board material, and a printed wiring
pattern of copper foil or the like is formed on the surface on the actuator unit 114 side. Each
circuit component 130 is mounted on the diaphragm 112 and connected to the printed wiring
pattern by soldering or the like. Each circuit component 130 includes a power amplifier for
driving and controlling the actuator unit 114 and a peripheral circuit thereof. Each of these
circuit components 130 is disposed in the vicinity of the upper and lower edges of the diaphragm
112 as shown in FIG. 1 (A).
[0012]
In this type of flat panel speaker system, it is known that the reproduction limit in the low band
can be further lowered by arranging a weight at the periphery of the diaphragm to adjust the
balance. Therefore, in the present embodiment, each circuit component 130 can be made to
function as a weight by distributing the circuit components 130 near the upper and lower edges
of the diaphragm 112, and a dedicated weight is provided. In the same manner, it is possible to
obtain the effect of lowering the reproduction limit of the low band. In addition, since the circuit
components 130 are dispersedly arranged on the diaphragm 112, a special space for arranging
and arranging similar circuit components is not necessary, and a thin flat active speaker system
can be obtained.
[0013]
As a driving actuator for vibrating the diaphragm 112, a dynamic type unit is used as in the
conventional example shown in FIG. 4, and the voice coil portion 116 of the actuator unit 114 is
bonded to the center position of the diaphragm 112. is there. However, the same effect can be
obtained by using a piezoelectric type actuator or the like as the driving actuator. The actuator
unit 114 is supported by a support member (not shown) to vibrate the diaphragm 112.
[0014]
FIG. 2 is a view showing a configuration example of a speaker system according to a second
embodiment of the present invention, FIG. 2 (A) is a front view, and FIG. 2 (B) is a side view. In
this example, one end (lower end side) 212B of the diaphragm 212 is fixed by the support
11-05-2019
4
member 224, and the other end (upper end side) 212C is free (free end). is there. That is, in this
type of flat panel loudspeaker, by forcibly fixing a part of the free peripheral portion of the
diaphragm, the low frequency reproduction limit can be lowered. Therefore, as shown in FIG. 2,
the lower end 212B of the diaphragm 212 is fixed by the support member 224 so as to lower the
low range reproduction limit.
[0015]
Also in this example, circuit components 230 constituting an electric circuit and the like are
mounted on the surface of the diaphragm 212 on the side of the actuator unit 214. Further, the
diaphragm 212 is made of a wiring board material, and a printed wiring pattern of copper foil or
the like is formed on the surface on the actuator unit 214 side. Each circuit component 230 is
mounted on the diaphragm 212 and connected to the printed wiring pattern by soldering or the
like.
[0016]
Further, as shown in FIG. 2A, each circuit component 230 in this example is disposed in the
vicinity of the upper and lower edges of the diaphragm 212, and further, the fixing point of the
diaphragm 212 by the support member 224 (lower end More components 230 are disposed in
an intermediate region between the proximity position) and the drive point (approximately the
center position) of the diaphragm 212 by the actuator unit 214. Thus, by arranging the circuit
component 230 between the fixed point and the drive point of the diaphragm 212, the fixed
point by the support member 224 does not affect the vibration generated from the drive point of
the diaphragm 212 to the upper end side It is supposed to be.
[0017]
Also in this example, as in the example shown in FIG. 1, the circuit component 230 is provided in
the vicinity of the upper end portion of the diaphragm 212 to act as a weight, thereby enhancing
the bass range. As a drive actuator for vibrating the diaphragm 212, a dynamic type unit is used
as in the conventional example shown in FIG. 4, and the voice coil portion 216 of the actuator
unit 214 is bonded to the center position of the diaphragm 212. is there. However, the same
effect can be obtained by using a piezoelectric type actuator or the like as the driving actuator.
The actuator unit 214 is supported by a common support member 224 to which the diaphragm
11-05-2019
5
212 is fixed, and vibrates the diaphragm 212.
[0018]
FIG. 3 is a view showing a configuration example of a speaker system according to a third
embodiment of the present invention, FIG. 3 (A) is a front view, and FIG. 3 (B) is a side view. This
example is a further modification of the example shown in FIG. Similarly to the example shown in
FIG. 2, in this example, one end (lower end side) 312B of the diaphragm 312 is fixed by the
support member 324, and the other end (upper end side) 312C is free (free end). Although this is
an example of the flat speaker unit 310, in this example, an extension portion 312D for mounting
the circuit component 330 is provided below the lower end portion 312B of the diaphragm 312.
[0019]
As described above, by providing the fixing point near the lower end of the diaphragm 312, the
extension 312D on the lower end side from the fixing point becomes an area substantially free of
vibration. Therefore, by mounting the circuit component 330 in this area, it is possible to make a
structure that hardly affects the vibration by the diaphragm 312 while being the extension part
312D integral with the diaphragm 312. Also in this example, the diaphragm 312 is made of a
wiring board material, and a printed wiring pattern of copper foil or the like is formed on the
surface on the actuator unit 314 side. However, in the case of this example, the printed wiring
pattern is formed only on the extension portion 312D. Each circuit component 330 is mounted
on the extension 312D of the diaphragm 312 and connected to the printed wiring pattern by
soldering or the like.
[0020]
Further, as a drive actuator for vibrating the diaphragm 312, a dynamic type unit is used as in
the conventional example shown in FIG. 4, and the voice coil portion 316 of the actuator unit
314 is bonded to the center position of the diaphragm 312. is there. However, the same effect
can be obtained by using a piezoelectric type actuator or the like as the driving actuator. The
actuator unit 314 is supported by a common support member 324 to which the diaphragm 312
is fixed, and vibrates the diaphragm 312.
11-05-2019
6
[0021]
In each of the above examples, the diaphragm is made of the wiring board material, but in
addition to this, by using a so-called foam material, a highly sensitive speaker can be realized. For
example, if it is a lightweight and flexible material such as expanded styrene, it is possible to
realize a speaker that is efficient and has a low f0 (minimum resonance frequency). In each of the
above examples, each circuit component is mounted on the surface of the diaphragm on the side
of the actuator unit. However, the same effect can be expected even if mounted on any surface of
the diaphragm and can be selected appropriately. .
[0022]
As described above, in the flat-plate type active speaker system of the present invention, various
circuit components constituting the control electric circuit etc. of the actuator for driving the
diaphragm are mounted on the diaphragm. Therefore, the wiring board, which was
conventionally required separately from the diaphragm, can also be used as a diaphragm, so that
two functions can be realized by one plate, and a thinner flat-plate type active speaker system
can be configured. Further, by selecting the arrangement of the circuit components, the
diaphragm can be functioned as a weight or the like, and the low frequency characteristic and
the like of the speaker can be improved without using a special component.
11-05-2019
7
Документ
Категория
Без категории
Просмотров
0
Размер файла
16 Кб
Теги
jp2000253487
1/--страниц
Пожаловаться на содержимое документа