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JP2010057092

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DESCRIPTION JP2010057092
PROBLEM TO BE SOLVED: To provide a speaker provided with a speaker diaphragm including a
transparent substrate and ultraviolet light emitting means for irradiating the same with
ultraviolet light, and the light emitting layer is clearly when ultraviolet light is not irradiated from
the ultraviolet light emitting means. A speaker excellent in designability is provided by making
the on / off difference of the light emission design by ultraviolet light stand out without being
recognized. A light emitting layer including a fluorescent pigment having an average particle
diameter of 1 μm or less is formed on at least one of a front surface and a rear surface of a
transparent substrate of a speaker diaphragm, and the light emitting layer is irradiated with
ultraviolet light. Ultraviolet light emitting means are provided. When the ultraviolet light emitting
means irradiates ultraviolet light to the light emitting layer, the light emitting layer emits visible
light, the visible light is viewed from the front side to the front side of the speaker diaphragm,
and the ultraviolet light emitting means emits ultraviolet light When not irradiated, the light
emitting layer is seen through. [Selected figure] Figure 5
スピーカー
[0001]
The present invention relates to a speaker including a speaker diaphragm including a transparent
substrate and ultraviolet light emitting means for irradiating the speaker diaphragm with
ultraviolet light.
[0002]
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1
In a speaker system in which a speaker is connected to an amplifier circuit for power
amplification of an audio signal, by providing a lighting device in which the light emission
amount changes according to the amplitude of the audio signal, visual stimulation is added in
addition to auditory stimulation There are some that try to give the listener a greater effect.
For example, in order to change the amount of light emission according to the output signal
voltage (or current) of the amplifier circuit applied to the voice coil of the speaker, it is directly
connected to the output of the amplifier circuit. There is a speaker illumination device connected
directly, and in addition to the one that emits light so that visible light can be viewed directly to
the listener, the speaker diaphragm is irradiated with ultraviolet light such as visible light or
black light, and reflected light or transmitted light There is something to give to the listener.
[0003]
Conventionally, in an illuminated speaker in which a light emitting element is provided in the
vicinity of the speaker, the light emitting element provided on the back of the transparent
material center cap of the speaker, a second coil formed on a voice coil bobbin of the speaker,
and the second There is a lighted speaker including a second magnet provided opposite to a coil
and configured to emit light by the power for driving the speaker (Patent Document 1). The light
emitting element may be provided on the back surface of the transparent material cone paper of
the speaker, or alternatively, the center cap of the speaker may be formed of an EL element. In
addition, conventionally, a fluorescent substance layer is formed on the surface of the diaphragm
and / or center cap forming the speaker, a semi-transparent film is laminated on the surface, and
a BL lamp is disposed around the speaker. There is a speaker that is characterized (Patent
Document 2). In this case, a speaker is further formed of a translucent resin material, a
fluorescent light emitting body layer and a semitransparent film are laminated on the back side
surface, and a black light lamp is disposed behind the speaker. It is also possible to make the
light emission state of the fluorescent substance visible from the front side through the speaker
by irradiating ultraviolet light from the rear of the speaker.
[0004]
Also conventionally, a speaker diaphragm having a base, a surface material disposed on the
radiation side of the base, and a light emitting layer provided on the radiation surface of the
surface material and containing a fluorescent pigment having an average particle diameter of 1
μm or less Patent Document 3) or a first outer layer, an intermediate layer having a punched
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2
portion having a predetermined shape, and a second outer layer, wherein the first outer layer, the
intermediate layer and the second outer layer are thermosetting. There is a speaker which is
impregnated with a resin, and at least one of the first outer layer and the second outer layer is
provided with a speaker member (Patent Document 4) including a fluorescent pigment. When the
average particle size of the fluorescent pigment is in such a range, the fluorescence is not clearly
recognized clearly when the light is not irradiated from the light source, and as a result, the on /
off difference is enhanced and the light emitting property and The speaker member and the
speaker excellent in design can be obtained.
[0005]
In the conventional speaker lighting device, a direct current input terminal connected to a direct
current power supply terminal of an amplifier circuit, a constant current limiting unit and a
switch unit serially connected between positive and negative audio input terminals, and a direct
current input terminal A light emitting means connected in series between the switch means and
the switch means, wherein the switch means is electrically isolated from the primary side
connected to the constant current limiting means and the secondary side connected to the light
emitting means There is one including an element (Patent Document 5). This speaker lighting
device can properly set the amount of light emission of the LED in a wide range from small input
to large input without losing the fidelity of reproduced sound, and the LED or resistor may be
destroyed even at large input. Instead, the listener can be given a greater rendering effect in
response to the audio signal.
[0006]
JP-A 3-53100 (FIGS. 1 to 3) JP-A 10-285679 (FIGS. 1 to 3) JP-A 2007-318610 (FIGS. 1 to 7) JPA 2007-318611 (FIGS. 1 to 3) JP 2007-318243 A (FIGS. 1 to 3)
[0007]
However, in the speaker provided with the conventional lighting device, even if the speaker
diaphragm is formed of a transparent material, the speaker diaphragm is lighted from the light
source, for example, by requiring a semi-transparent film in the case of Patent Document 2.
When the light is not irradiated, the design of the part through which light is transmitted or the
design of the part through which the fluorescent pigment emits light may be visually recognized,
and it is difficult to make the on-off difference noticeable when the light is irradiated from the
light source There is a problem of
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3
[0008]
The present invention has been made to solve the above-mentioned problems of the prior art,
and its object is to provide a speaker diaphragm including a transparent substrate and ultraviolet
light emitting means for irradiating the speaker diaphragm with ultraviolet light. It is an object of
the present invention to provide a speaker having excellent designability by making the on / off
difference of the light emission design by the ultraviolet light stand out without clearly
recognizing the light emitting layer when light is not irradiated from the light source.
[0009]
The speaker according to the present invention is a speaker provided with a speaker diaphragm
including a transparent base and ultraviolet light emitting means for irradiating the speaker
diaphragm with ultraviolet light, and the front or back of the transparent base of the speaker
diaphragm A light emitting layer including a fluorescent pigment having an average particle
diameter of 1 μm or less is formed on at least one of the surfaces.
When the ultraviolet light emitting means irradiates the light emitting layer with ultraviolet light,
the light emitting layer emits visible light, the visible light is viewed from the front side of the
speaker diaphragm, and the ultraviolet light is not irradiated from the ultraviolet light emitting
means The light emitting layer is seen through.
[0010]
Also preferably, in the speaker of the present invention, the light emitting layer is formed on the
back of the transparent substrate, and the ultraviolet light emitting means is disposed so as to
irradiate the light emitting layer with ultraviolet light from the back side of the speaker
diaphragm. When the ultraviolet light emitting means irradiates the light emitting layer with
ultraviolet light, the light emitting layer emits visible light, and the visible light passes through
the transparent substrate and is viewed from the front side of the speaker diaphragm.
[0011]
More preferably, in the speaker of the present invention, the transparent substrate of the speaker
diaphragm is formed of plain glass or heat-resistant glass.
[0012]
Preferably, the speaker according to the present invention comprises the above-mentioned
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4
speaker diaphragm, ultraviolet light emitting means, an edge fixed to the outer peripheral edge of
the speaker diaphragm, and a voice coil bobbin attached substantially at the center of the
speaker diaphragm. A coil wound on a voice coil bobbin, a magnetic circuit having a magnetic
gap for disposing the coil, a damper fixed to the voice coil bobbin, an edge, a damper, and a
frame coupled to the magnetic circuit; The light emitting means comprises a black light lamp or
an ultraviolet light emitting diode.
[0013]
Hereinafter, the operation of the present invention will be described.
[0014]
The speaker of the present invention is a speaker provided with a speaker diaphragm including a
transparent base material, and ultraviolet light emitting means for irradiating the speaker
diaphragm with ultraviolet light.
The loudspeaker diaphragm has a front surface on the listener side and a back surface on the
opposite side.
The transparent substrate is preferably plain glass or heat-resistant glass.
In the speaker diaphragm of the present invention, a light emitting layer including a fluorescent
pigment having an average particle diameter of 1 μm or less is formed on at least one of the
front surface and the back surface of the transparent substrate.
[0015]
The speaker according to the present invention may be an electrodynamic speaker including a
voice coil and a magnetic circuit, and the ultraviolet light emitting means may be a black light
lamp that emits ultraviolet light or an ultraviolet light emitting diode. Good.
In the speaker, when the ultraviolet light emitting means irradiates the light emitting layer with
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5
ultraviolet light, the light emitting layer emits visible light, and the visible light passes through
the transparent speaker diaphragm and is viewed from the front side of the speaker diaphragm
As a result, the design (characters, figures, patterns, or logos, etc.) designed by the light emitting
layer containing the fluorescent pigment is included.
) Is visualized on a transparent speaker diaphragm.
Therefore, for example, if the ultraviolet light emitting means changes the amount of light
emission corresponding to the magnitude of the amplitude of the audio signal, the speaker of the
present invention provides the listener with visual stimulation in addition to auditory stimulation
at the time of audio reproduction. You can give it a bigger stage effect.
[0016]
On the other hand, for example, when the speaker diaphragm is made of heat-resistant glass, the
speaker diaphragm of heat-resistant glass is a fluorescent pigment having an average particle
diameter of 1 μm or less when the ultraviolet light emitting means does not irradiate ultraviolet
light. The light emitting layer containing the see through, the back side of the speaker diaphragm
(that is, the voice coil, magnetic circuit, etc. of the speaker components. ) Is viewed from the front
side. The speaker diaphragm made of heat-resistant glass has sufficient visual impact in that the
back side can be seen through, but in addition, when the ultraviolet light is irradiated by the
ultraviolet light emitting means, the transparent speaker diaphragm The light emitting design
appears on the front side of the light emitting diode, and the on / off difference of the light
emitting design can be emphasized.
[0017]
In particular, when the speaker diaphragm is formed of plain glass or heat-resistant glass and the
light emitting layer is formed on the back of the transparent substrate, the ultraviolet light
emitting means emits ultraviolet light to the listener on the front side If not, the light emitting
layer is almost transparent. In addition to the fact that the average particle size of the fluorescent
pigment contained in the light emitting layer is 1 μm or less, this is because the light emitting
layer is not exposed on the front of the transparent substrate and the transparent glass blocks
the listener. It is. Therefore, in the speaker of the present invention in which the ultraviolet light
emitting means is arranged to irradiate the ultraviolet light from the back side of the speaker
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6
diaphragm, when the ultraviolet light is irradiated to the light emitting layer, the light emitting
layer emits visible light. The light passes through the transparent substrate and is viewed from
the front side of the speaker diaphragm, and the light emitting design by the light emitting layer
appears on the transparent glass diaphragm, and if the irradiation of the ultraviolet light is
stopped, the back side is viewed again Is recognized from the front side as a transparent speaker
diaphragm. As described above, since the on / off difference of the light emission design becomes
significantly larger than that of the conventional case, it is possible to realize a speaker having an
excellent rendering effect.
[0018]
In addition, the ultraviolet light emission means used for the speaker of this invention is a
speaker illuminating device of the said patent document 5, Comprising: You may use what
contains the black light lamp which irradiates an ultraviolet light, or an ultraviolet light emitting
diode. . When the light emitting means is made to emit light corresponding to the audio signal
outputted from the amplifier circuit to the voice coil of the speaker, the light emitting design by
the light emitting layer appears on the transparent glass diaphragm, and the operation before
and after the speaker diaphragm Since the light emitting means emits light in conjunction with
this, it is possible to give the listener a visual stimulus and to give a greater stage effect. In
addition, with respect to the audio signal voltage applied to both ends of the voice coil of the
speaker, it is possible to obtain a lighting effect that follows the magnitude of the audio signal
from a low voltage to a certain extent, and set a certain limiter to the light quantity of the
illumination. Therefore, even if a protection diode is provided to protect the switch element
against the positive and negative audio signal voltages applied across the voice coil of the
speaker, the amplitude of the audio signal is maintained regardless of the polarity of the audio
signal. It is possible to obtain a lighting effect that follows the magnitude.
[0019]
In the speaker of the present invention, it is difficult for the light emitting layer to be clearly
recognized when light is not irradiated from the light source, and the on / off difference of the
light emission design by the ultraviolet light is enhanced, the designability is excellent, Can be
given.
[0020]
The speaker of the present invention is a speaker provided with a speaker diaphragm including a
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7
transparent base material, and ultraviolet light emitting means for irradiating the speaker
diaphragm with ultraviolet light.
The loudspeaker diaphragm has a front surface on the listener side and a back surface on the
opposite side. A light emitting layer including a fluorescent pigment having an average particle
diameter of 1 μm or less is formed on at least one of the front surface and the back surface of
the transparent substrate of the speaker diaphragm. When the ultraviolet light emitting means
irradiates ultraviolet light to the light emitting layer, the light emitting layer emits visible light,
the visible light is viewed from the front side of the speaker diaphragm, and the ultraviolet light
emitting means does not irradiate ultraviolet light In some cases, the light emitting layer is seen
through and the back side of the speaker diaphragm is viewed from the front side.
[0021]
Hereinafter, although the speaker by the preferred embodiment of the present invention is
explained, the present invention is not limited to these embodiments.
[0022]
FIG. 1 is a schematic cross-sectional view of a speaker 1 according to a preferred embodiment of
the present invention.
The speaker 1 has a speaker diaphragm 5, a voice coil bobbin 2 bonded to the speaker
diaphragm 5, and a voice coil 3 wound around the lower end of the voice coil bobbin 2. The voice
coil 3 is disposed in the magnetic gap of the magnetic circuit 4, vibrates with a driving force
generated according to the input audio signal, and drives the speaker diaphragm 5 by displacing
the inside of the magnetic gap. The vibration system formed by the speaker diaphragm 5 and the
voice coil bobbin 2 is vibratably supported in the illustrated Z direction by the edge 6 and the
damper 7. The edge 6 and the outer peripheral side of the damper 7 are fixed to a frame 8
connected to the magnetic circuit 4. When the speaker diaphragm 5 vibrates, sound waves as
compression waves are generated in the air, and as a result, the sound is reproduced from the
speaker 1.
[0023]
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8
The magnetic circuit 4 of the present embodiment is an external magnet type magnetic circuit
provided with a pole, a plate and a magnet, and is provided with a cancel magnet and a cover 9
covering the magnetic circuit. Further, an audio signal is supplied to the voice coil 3 through a
terminal (not shown) and a tinsel wire K (not shown). The speaker diaphragm 5 has a
substantially spherical shell shape, the concave surface 5a side is the front surface, and the
convex surface 5b side is the rear surface. The voice coil bobbin 2, the voice coil 3, the magnetic
circuit 4, the damper 7, and the tinsel wire K are disposed on the back side. The magnetic circuit
4 may be another internal magnet type magnetic circuit, a repulsive magnetic circuit, or the like.
[0024]
A speaker lighting device 10 including an LED 12 for emitting ultraviolet light is attached to the
speaker 1 of the present embodiment. Specifically, the speaker lighting device 10 includes an
attachment member 11 fitted to a through hole of a pole constituting the magnetic circuit 4, an
LED 12 attached to the attachment member 11, and a signal line 13 for supplying power to the
LED 12; including. Therefore, the speaker lighting device 10 is arranged to emit ultraviolet light
from the back side of the speaker diaphragm 5.
[0025]
FIG. 2 is a perspective view of the speaker 1 of the present embodiment as viewed obliquely from
the front. As will be described later, the speaker diaphragm 5 is a speaker diaphragm using a
transparent heat-resistant glass as a base material. Therefore, in the speaker 1, as shown in FIG.
2, the voice coil bobbin 2 located on the back side of the speaker diaphragm 5, the voice coil 3,
the center pole of the magnetic circuit 4, the damper 7, and the tinsel wire K The speaker
diaphragm 5 is seen through from the front side. The speaker 1 of the present embodiment is an
electrodynamic speaker having a diameter of about 10 cm.
[0026]
In the speaker 1 of the present embodiment, a speaker diaphragm of a comparative example (not
shown) having a substantially spherical shell shaped speaker diaphragm of the same shape (not
shown) is used as a speaker vibration of transparent heat resistant glass. It is a speaker replaced
with board 5. For example, in the speaker diaphragm of the comparative example, a
thermosetting resin is impregnated in the base material, the base material is a laminate including
10-05-2019
9
a natural fiber woven layer and a natural fiber non-woven layer, and the thermosetting resin is
Any suitable thermosetting resin such as unsaturated polyester may be employed. That is, in the
speaker 1 of this embodiment, the components other than the transparent heat-resistant glass
speaker diaphragm 5 can commonly use the components of the conventional electrodynamic
speaker.
[0027]
The speaker diaphragm 5 has a transparent diaphragm portion 5s of a substantially circular
shape in a front view defined as a part of a large radius spherical shell, and the transparent
diaphragm portion 5s has a concave surface 5a on the front side, A corresponding back side
convex surface 5b and an outer peripheral edge 5c defining the outer diameter thereof are
included. In the speaker diaphragm 5 of the present embodiment, the radius rc from the center
point O to the outer peripheral edge 5c is about 39.5 mm, and the total height hc of the
transparent diaphragm 5s is about 21.6 mm. The transparent diaphragm portion 5s of the
speaker diaphragm 5 is made of transparent heat-resistant glass as a base material, so the
thickness of the transparent diaphragm portion 5s of this embodiment is about 0.45 mm to
about 0.60 mm over the whole. In the range of approximately uniformly thin. The weight of the
speaker diaphragm 5 of this embodiment is about 11.5 g.
[0028]
The speaker diaphragm 5 is a speaker diaphragm using a heat-resistant glass as a base material,
and is formed using at least silica sand, borax, boric acid, alumina, and sodium chloride as raw
materials. Heat resistant glass has less expansion due to heat compared to soda lime glass (same
glass) whose main raw material is silica sand, lime, soda ash, etc., so it is resistant to rapid
temperature changes, and soda lime glass or crystal It has the characteristic that its specific
gravity is smaller than that of glass and the like. The heat-resistant glass has high viscosity at the
time of molding, can be thinly processed into the shape of a substantially spherical shell-like
speaker diaphragm by blow molding, and is advantageous in the step of cutting at the position of
the outer peripheral edge 5c. In addition, since the heat resistant glass can be made thinner, the
overall weight of the speaker diaphragm 5 can be further reduced, so that the heat resistant glass
is more suitable for use as a speaker diaphragm than conventional soda lime glass.
[0029]
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10
Near the center of the convex surface 5b on the back side of the transparent speaker diaphragm
5, a light emitting layer 5x containing a fluorescent pigment having an average particle diameter
of 1 μm or less is formed on the surface. The light emitting layer 5x is so small that the average
particle diameter of the fluorescent pigment is as small as 1 μm or less, so it is seen through
when the LED 12 does not emit ultraviolet light. On the other hand, when the LED 12 emits
ultraviolet light, the light emitting layer 5 x emits visible light, which is visually recognized on the
front side of the transparent speaker diaphragm 5. The average particle diameter of the
fluorescent pigment forming the light emitting layer 5x is 1 μm or less, more preferably 0.01 to
0.8 μm, and particularly preferably 0.05 to 0.5 μm. When the average particle diameter is in
such a range, the presence of the light emitting layer 5 x is not clearly recognized when the LED
12 is not irradiating the ultraviolet light, that is, when the light emitting layer 5 x does not emit
light. As a result, it is possible to make the on / off difference stand out. Furthermore, since the
on / off difference can be enhanced even without providing a semi-transparent film on the
surface of the light emitting layer 5x, the light emitting degree of the light emitting layer 5x is
not weakened and the light emitting property is excellent.
[0030]
Examples of the organic fluorescent pigment include resin particles containing a fluorescent dye.
Any appropriate fluorescent dye can be employed as the fluorescent dye. Specific examples
include basic dyes, acid dyes, disperse dyes, oil-soluble dyes, fluorescent whitening dyes and the
like. Any appropriate resin can be adopted as the resin for forming the resin particles. As a
specific example, acrylic resin, melamine resin, urethane resin, polyester resin and the like can be
mentioned. In addition, any appropriate method is adopted as a method of forming the light
emitting layer 5x. As a specific example, there is a method of applying a dispersion containing a
fluorescent pigment on any diaphragm surface of the speaker diaphragm 5 so as to obtain
desired characters and patterns. The dispersion contains any suitable dispersing solvent
depending on the fluorescent pigment used, and the dispersing solvent may, for example, be
water, an organic solvent such as alcohol, or the like. In order to form the light emitting layer 5x
on the speaker diaphragm 5, any appropriate method may be adopted as a method of applying
the dispersion. Specific examples include screen printing, silk screen printing, transfer printing,
pad printing, and the like.
[0031]
FIG. 3 is a diagram illustrating a speaker system 20 according to a preferred embodiment of the
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11
present invention. For example, the speaker system 20 configures a sound reproduction system
by connecting the head unit 21, the amplifier 22, the battery 23, the illumination drive unit 24,
and the speaker 1 attached to the cabinet 25. The lighting drive unit 24 is supplied with a DC
voltage + Vcc from the battery 23. The direct-current voltage + Vcc of the battery 23 is a positive
direct-current voltage, and in the case of on-vehicle use, the voltage +12 V or +24 V is often used.
In the present embodiment, only one audio signal channel is illustrated, ie, a monaural signal, but
in the case of a stereo signal including left and right signals, reproduction channels
corresponding to the number of audio signal channels are used. You may provide. In addition,
when the reproduction band is a bass component and the speaker system 20 is an amplifier
built-in subwoofer, stereo signals may be mixed to be a monaural signal.
[0032]
The audio signal output from the head unit 21 is input to the input terminal of the amplifier 22
and amplified, and is input to the input terminal of the speaker 1 from the positive and negative
audio output terminals (+, −) and the illumination drive unit It branches to 24 and is input. The
output of the illumination drive unit 24 is supplied to the speaker illumination device 10 of the
speaker 1 through the terminal 14 to which the above-mentioned signal line 13 is connected.
That is, the speaker illumination device 10 is connected in parallel to the speaker 1 to the audio
output terminal of the amplifier 22, and the speaker 1 performs electroacoustic conversion of the
audio signal to vibrate the speaker diaphragm 5 to reproduce the audio, The ultraviolet light is
emitted from the LED 12 attached to the speaker 1 based on the audio signal. The cabinet 25 to
which the speaker 1 is attached separates the space before and after the speaker diaphragm 5 to
define the acoustic capacity necessary for bass reproduction, and includes the amplifier 22, the
battery 23, and the illumination driving unit 24. You may.
[0033]
FIG. 4 is a view for explaining an embodiment of the illumination drive unit 24. As shown in FIG.
As described above, the illumination drive unit 24 is connected in parallel to the speaker 1 as
viewed from the output of the amplifier 22. That is, while the audio signal amplified and output
from the positive and negative audio output terminals (+,-) of the amplifier 22 is input to the
speaker 1, it is input to the positive and negative audio input terminals of the illumination drive
unit 24. Is also input. A constant current diode 15, a primary side LED 16a of a photocoupler 16
electrically isolated from the secondary side connected to the LED 12, and a protection diode 17
are connected in series between the audio input terminals of the illumination drive unit 24.
Connect to The emitter side of the secondary side transistor 16 b of the photocoupler 16 is
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12
grounded, and the collector side is connected to the LED 12. The DC voltage + Vcc of the battery
23 is supplied to the LED 12 through the resistor 19.
[0034]
In the illumination drive unit 24, when the voltage (A) of the audio signal is a sine wave, the
current (B) flowing in the voice coil of the speaker 1 and the currents (C) and (D) in the speaker
illumination device 10 will be described. . Assuming that a positive voltage applied when current
flows from positive to negative in the diode is a forward voltage and a negative voltage opposite
thereto is a reverse voltage, the constant current diode 15 has a forward voltage of a
predetermined value or more. The current starts to flow in one direction when it becomes, and
when the voltage is further increased, the current flowing is limited to a constant current above a
certain value. In the illumination drive unit 24, since the constant current diode 15 and the
primary side LED 16 a of the photocoupler 16 are connected in series, the forward voltage (that
is, the positive voltage) of the audio signal (voltage (A)) input to the speaker 1 is When the
voltage exceeds the sum of the operation start voltage of the constant current diode 15 and the
operation start voltage of the primary side LED 16a of the photocoupler 16, a current flows
between the collector and the emitter of the secondary side transistor 16b of the photocoupler
16. Flow starts (current (C)), that is, the photocoupler 16 is turned on. Since the DC voltage + Vcc
of the battery 23 is supplied to the LED 12 via the resistor 19, a DC current flows to the LED 12
(current (D)), and as a result, the LED 12 emits ultraviolet light. When the photocoupler 16 is
used, switch operation is possible even with a direct current signal. Therefore, even for an
extremely low frequency sound signal input, which is a problem in a conventional circuit using a
transformer or a coupling coil, a lighting effect interlocked with the sound signal You can get
[0035]
The illumination drive unit 24 and the speaker illumination device 10 according to the present
embodiment cause the LED 12 to emit light according to the magnitude of the amplitude of the
audio signal input to the speaker 1 to give a visual stimulus to the listener, resulting in a greater
effect. Can be given. By adjusting the resistance 19 that determines the direct current (D) flowing
to the LED 12, the voltage of the audio signal input to the speaker 1 follows the audio signal
voltage from a low voltage to some extent, and the dynamic range of the audio signal is
considered. A lighting effect can be obtained.
[0036]
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13
FIG. 5 illustrates the light emission design viewed from the front through the transparent speaker
diaphragm 5 when the LED 12 of the speaker lighting device 10 irradiates the speaker
diaphragm 5 with ultraviolet light in the speaker 1 of the present embodiment. It is a figure to
do. FIGS. 5 (a) and 5 (b) are both perspective views of the speaker 1 viewed obliquely from the
upper front side, and FIG. 5 (a) is a result of the LED 12 irradiating the speaker diaphragm 5 with
ultraviolet light. The light emitting layer 5x emits visible light, and FIG. 5B shows the case where
the LED 12 does not irradiate the speaker diaphragm 5 with ultraviolet light and the light
emitting layer 5x is seen through. .
[0037]
For example, in the case of this example, a fluorescent pigment dispersion A (manufactured by
Shinroihi Co., Ltd., SF-5000, average particle diameter of fluorescent pigment: 0.1 μm, excitation
wavelength of fluorescent pigment: 140 to 400 nm, fluorescent pigment For example, by screen
printing in the vicinity of the center of the convex surface 5b on the back side of the transparent
speaker diaphragm 5 based on heat-resistant glass using a hanging density: 0.5 to 3.5 g / cm
<3>). A light emitting layer 5x having a desired shape such as a character string (logo) of
"ONKYO" was formed. In the transparent speaker diaphragm 5 having the concave surface 5a on
the front side, as shown in FIG. 5B, when the LED 12 does not irradiate the light emitting layer 5x
with ultraviolet light, the logo can not be visually recognized. On the other hand, when the LED
12 irradiates the light emitting layer 5x with ultraviolet light as shown in FIG. 5A, a logo formed
of the light emitting layer 5x can be made to appear inside the cylindrical voice coil bobbin 2.
[0038]
That is, in the speaker 1 of the present embodiment, when the LED 12 of the speaker lighting
device 10 irradiates the light emitting layer 5 x with ultraviolet light, the light emitting layer 5 x
formed on the back side of the speaker diaphragm 5 emits visible light Light is transmitted
through the speaker diaphragm 5 having a transparent heat-resistant glass as a base material,
and is viewed from the front side of the speaker diaphragm 5, and as a result, a light emission
design by the logo formed of the light emitting layer 5x appears. Moreover, if irradiation of the
ultraviolet light from LED12 is stopped, it will be recognized from the front side as the speaker 1
provided with the transparent speaker diaphragm 5 by which the back side is seen through
again. As described above, since the on / off difference of the light emission design becomes
significantly larger than that of the conventional case, it is possible to realize a speaker having an
10-05-2019
14
excellent rendering effect.
[0039]
In the speaker 1 of the present embodiment, since the light emitting layer 5x is formed on the
back side of the speaker diaphragm 5, when the ultraviolet light from the LED 12 is not
irradiated, the light emitting layer made of a fluorescent pigment having a small average particle
diameter The presence of 5x is hardly visible. Since the light emitting layer 5x is formed on the
convex surface 5b on the rear surface side of the speaker diaphragm 5, unevenness due to the
thickness of the light emitting layer occurs on the concave surface 5a on the front surface, or the
reflection on the concave surface 5a changes. It is because there is no such thing. Of course, the
light emitting layer 5x may be provided not only on the back side of the transparent substrate of
the speaker diaphragm 5, but also on the front side of the concave 5a, and may be formed on any
position of the concave 5a and / or the convex 5b. It may be done.
[0040]
In the speaker 1 of the present embodiment, the speaker diaphragm 5 made of a transparent
heat-resistant glass as a base is thinly formed substantially uniformly in the range of 0.3 mm to
1.2 mm, so ultraviolet light from the LED 12 Are repeated reflections inside the speaker
diaphragm 5. This reflected light scatters when it strikes a part where the adhesive is applied to
the part where the voice coil bobbin 2 is attached, or a part where regular reflection is hindered
such as the outer peripheral edge 5 c of the speaker diaphragm 5, etc. , Emits visible light.
Therefore, as shown in FIG. 5, not only the light emission design by the logo formed of the light
emission layer 5x, but also part of parts such as the speaker diaphragm 5 or the voice coil bobbin
2 emits light, so a speaker excellent in rendering effect Can be realized.
[0041]
The thickness of the transparent diaphragm portion 5s of the heat resistant glass can be almost
uniformly thin by forming it as a part of a spherical shell by blow molding, so the speaker 1
including the speaker diaphragm 5 of the heat resistant glass of this embodiment In the case of a
flat glass, or in the case of a regular glass having a large thickness, a high reproduction sound
pressure level can be realized. However, the speaker diaphragm 5 is not limited to heat resistant
glass, but may be soda lime glass (flat glass) mainly made of silica sand, lime, soda ash or the like.
10-05-2019
15
The speaker diaphragm 5 may be a transparent acrylic resin diaphragm. Even if the speaker
diaphragm 5 of plain glass or acrylic resin is used, the light emitting layer 5 x containing a
fluorescent pigment having an average particle diameter of 1 μm or less is formed (preferably,
the back side of the diaphragm is preferred because the back side is viewed through). Thus, it is
possible to realize the speaker excellent in the rendering effect, in which the on / off difference of
the light emission design is significantly larger than that of the prior art.
[0042]
In the illumination drive unit 24 and the speaker illumination device 10 of the present
embodiment, the amount of light emission of the LED 12 having a higher rendering effect can be
set in consideration of the dynamic range of the audio signal, but of course the illumination drive
unit 24 is further simplified. A direct current may be applied to the LED 12 regardless of the
audio signal to emit light constantly. Further, the LED 12 may be a black light LED that emits
ultraviolet light or a UV-LED, and in some cases, may be a black light lamp that emits ultraviolet
light.
[0043]
Of course, the application of the speaker 1 including the speaker lighting device 10 is not limited
to the amplifier built-in subwoofer. The speaker 1 may be a full range speaker that reproduces
the entire band, and in some cases, may be a tweeter that reproduces a high frequency band. The
speaker lighting device 10 may be provided with a mounting member 11 adapted to the
configuration of the other magnetic circuit 4 as long as it includes the LED 12.
[0044]
The speaker of the present invention can be suitably applied to a speaker used for various
applications (home use, car use). Furthermore, it can be applied to any speaker, such as a woofer
playing particularly in the low frequency range or a tweeter playing in the high frequency range.
Moreover, the speaker diaphragm of this invention is applicable not only to a speaker but to
headphones and a microphone provided with a diaphragm.
[0045]
10-05-2019
16
1 is a schematic cross-sectional view of a speaker 1 according to a preferred embodiment of the
present invention. (Example 1) FIG. 1 is a perspective view of a speaker 1 of an example
according to a preferred embodiment of the present invention as viewed obliquely from the front.
(Example 1) It is a figure explaining the speaker system 20 by preferred embodiment of this
invention. (Example 1) FIG. 6 is a view for explaining an example of the illumination drive unit
24. FIG. (Example 1) It is a figure explaining the light emission design viewed from the front
through the transparent speaker diaphragm 5 of the speaker of this invention. Example 1
Explanation of sign
[0046]
Reference Signs List 1 speaker 2 voice coil bobbin 3 voice coil 4 magnetic circuit 5 speaker
diaphragm 5s transparent diaphragm 5a concave (front) 5b convex (back) 5c outer peripheral
edge 6 edge 7 damper 8 frame 9 cover 10 speaker lighting device 11 mounting member 12 LED
13 signal line 14 terminal 15 constant current diode 16 photo coupler 17 protection diode 20
speaker system 21 head unit 22 amplifier 23 battery 24 illumination drive unit 25 cabinet
10-05-2019
17
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