JP2010057092A - Speaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker with excellent design by preventing a light emitting layer from being clearly viewed when the layer is not irradiated with ultraviolet light from an ultraviolet light emitting means and exaggerating an ON/OFF difference in light emitting design using ultraviolet light as to the speaker including a speaker diaphragm having a transparent substrate and the ultraviolet light emitting means for irradiating the speaker diaphragm with ultraviolet light. <P>SOLUTION: The light emitting layer containing a fluorescent pigment whose average particle size is &le;1 &mu;m is formed on at least either one of a front surface and a rear surface of the transparent substrate of the speaker diaphragm and the ultraviolet light emitting means for irradiating the light emitting layer with ultraviolet light is arranged. 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 is viewed on the front surface side of the speaker diaphragm from the front surface side, and when the ultraviolet light emitting means does not perform irradiation with ultraviolet light, the light emitting layer is seen through. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a speaker including a speaker diaphragm including a transparent substrate and ultraviolet light emitting means for irradiating the diaphragm with ultraviolet light.

  In a speaker system in which a speaker is connected to an amplifier circuit that amplifies the power of an audio signal, a visual stimulus is provided in addition to an auditory stimulus at the time of sound reproduction by providing an illuminating device that changes the amount of light emission according to the amplitude of the audio signal. Is intended 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, that is, to the voice coil of the speaker There is a speaker lighting device that is directly connected, and in addition to what emits light so that visible light can be seen directly by the listener, the speaker diaphragm is irradiated with ultraviolet light such as visible light or black light, and reflected or transmitted light. There is something to give the listener.

  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 portion of the transparent material center cap of the speaker, the second coil formed on the voice coil bobbin of the speaker, and the second There is an illuminated speaker including a second magnet provided to face a coil so that the light emitting element emits light with power for driving the speaker (Patent Document 1). The light-emitting element may be provided on the rear surface of the transparent material cone paper of the speaker. Alternatively, the center cap of the speaker may be composed of an EL element. Further, conventionally, a fluorescent light emitting 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 characteristic speaker (Patent Document 2). In this case, the speaker is further formed of a translucent resin material, a fluorescent light emitter layer and a semi-transparent film are laminated on the back surface, and a black light lamp is disposed behind the speaker. By irradiating ultraviolet rays from the back of the speaker, the light emission state of the fluorescent light emitter can be seen from the front side through the speaker.

  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 portion of a predetermined shape, and a second outer layer, and the first outer layer, the intermediate layer, and the second outer layer are thermosetting. There is a speaker that is impregnated with a resin, and at least one of a first outer layer and a second outer layer includes a speaker member (Patent Document 4) containing a fluorescent pigment. When the average particle diameter of the fluorescent pigment is in such a range, it is difficult to clearly see the fluorescence when light is not irradiated from the light source. As a result, the on / off difference is conspicuous, and the luminescent property is improved. A speaker member and a speaker excellent in design can be obtained.

  The conventional speaker illumination device includes a DC input terminal connected to the DC power supply terminal of the amplifier circuit, a constant current limiting means and a switch means connected in series between the positive and negative audio input terminals, and a DC input terminal. A light emitting means connected in series between the switch means and the switch means, wherein the switch means is electrically insulated from the primary side connected to the constant current limiting means and the secondary side connected to the light emitting means Some devices include an element (Patent Document 5). This speaker lighting device can appropriately set the light emission amount of LED in a wide range from small input to large input without impairing the fidelity of reproduced sound, and the LED or resistor may be destroyed even at large input. In addition, a large effect can be given to the listener corresponding to the audio signal.

Japanese Utility Model Publication No. 3-53100 (FIGS. 1 to 3) Japanese Patent Laid-Open No. 10-285679 (FIGS. 1 to 3) JP 2007-318610 A (FIGS. 1 to 7) JP 2007-318611 A (FIGS. 1 to 3) JP 2007-318243 A (FIGS. 1 to 3)

  However, in a speaker equipped with a conventional illumination device, even if the speaker diaphragm is formed of a transparent material, for example, in the case of Patent Document 2, a semi-transparent film is required. When the light is not irradiated, the design of the part through which light is transmitted, or the design of the part from which the fluorescent pigment emits light may be visually recognized, and it is difficult to make the on / off difference stand out when irradiating light from the light source. There is a problem.

  The present invention has been made in order to solve the above-described problems of the prior art, and an object of the present invention is to provide a speaker diaphragm including a transparent substrate and ultraviolet light emitting means for irradiating the speaker with ultraviolet light. An object of the present invention is to provide a speaker having excellent design characteristics by making a light emitting layer not clearly visible when light is not irradiated from a light source, and making an on / off difference of a light emitting design due to ultraviolet light stand out.

  The speaker of the present invention is a speaker comprising a speaker diaphragm including a transparent base material, and an ultraviolet light emitting means for irradiating the speaker diaphragm with ultraviolet light, on the front or rear surface of the transparent base material of the speaker diaphragm. A light emitting layer containing a fluorescent pigment having an average particle diameter of 1 μm or less is formed on at least one surface. 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 visible from the front side of the speaker diaphragm, and no ultraviolet light is irradiated from the ultraviolet light emitting means. The light emitting layer is seen through.

  Preferably, in the speaker of the present invention, the light emitting layer is formed on the back surface of the transparent substrate, and the ultraviolet light emitting means is arranged 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 this visible light passes through the transparent substrate and is visually recognized from the front side of the speaker diaphragm.

  More preferably, in the speaker of the present invention, the transparent base material of the speaker diaphragm is formed of ordinary glass or heat resistant glass.

  Preferably, the speaker of the present invention includes the above-described speaker diaphragm, ultraviolet light emitting means, an edge fixed to the outer peripheral edge of the speaker diaphragm, and a voice coil bobbin attached to the approximate center of the speaker diaphragm. A coil wound around the 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 connected to the magnetic circuit, and ultraviolet. The light emitting means includes a black light lamp or an ultraviolet light emitting diode.

  Hereinafter, the operation of the present invention will be described.

  The speaker of the present invention is a speaker including a speaker diaphragm including a transparent base material and ultraviolet light emitting means for irradiating the speaker diaphragm with ultraviolet light. The speaker 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 containing 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.

  The speaker of 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 irradiates ultraviolet light or an ultraviolet light emitting diode. Good. When the ultraviolet light emitting means irradiates the light emitting layer with ultraviolet light, the speaker emits visible light, and this visible light passes through the transparent speaker diaphragm and is seen from the front side of the speaker diaphragm. As a result, the design (including characters, figures, patterns, logos, etc.) designed by the light emitting layer containing the fluorescent pigment is visualized on the transparent speaker diaphragm. Therefore, for example, if the ultraviolet light emitting means changes the light emission amount in accordance with the amplitude of the audio signal, the speaker of the present invention can provide a visual stimulus to the listener in addition to the auditory stimulus during audio reproduction. Giving a greater effect.

  On the other hand, for example, when the speaker diaphragm is formed of heat resistant glass, the speaker diaphragm of the 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 back side of the speaker diaphragm (that is, a speaker component such as a voice coil or a magnetic circuit) is viewed from the front side. The speaker diaphragm made of heat-resistant glass has a sufficient visual impact in that the back side of the speaker diaphragm can be seen through, but in addition, when irradiated with ultraviolet light by ultraviolet light emitting means, a transparent speaker diaphragm The light emitting design appears on the front side of the light emitting device, and the on / off difference of the light emitting design can be emphasized.

  Especially when the speaker diaphragm is made 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 irradiates the front side listener with ultraviolet light. Otherwise, the light emitting layer is almost seen through. This is because the fluorescent pigment contained in the light-emitting layer has an average particle diameter of 1 μm or less, and the light-emitting layer is not exposed on the front surface of the transparent substrate, and transparent glass blocks the listener. It is. Therefore, in the speaker of the present invention in which the ultraviolet light emitting means is arranged so as to irradiate ultraviolet light from the back side of the speaker diaphragm, when the ultraviolet light is irradiated to the light emitting layer, the light emitting layer emits visible light. When light passes through the transparent substrate and is seen from the front side of the speaker diaphragm, a light emitting design with a light emitting layer appears on the transparent diaphragm of glass, and if the irradiation of ultraviolet light is stopped, the back side is again seen through. It is recognized from the front side as a transparent speaker diaphragm. As described above, since the ON / OFF difference of the light emitting design is remarkably larger than the conventional one, it is possible to realize a speaker excellent in effect.

  The ultraviolet light emitting means used for the speaker of the present invention may be, for example, the speaker illumination device disclosed in Patent Document 5, which includes a black light lamp that irradiates ultraviolet light or an ultraviolet light emitting diode. . When the light emitting means emits light in response to the audio signal output 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 a visual stimulus to the listener and to provide a greater effect. Also, with respect to the audio signal voltage applied to both ends of the voice coil of the speaker, it is possible to obtain an illumination effect that follows the magnitude of the audio signal from a certain low voltage, and to set a certain limiter for the amount of illumination light Therefore, even when a protective diode is provided to protect the switch element against the positive and negative audio signal voltages applied to both ends of the voice coil of the speaker, the amplitude of the audio signal can be reduced regardless of the polarity of the audio signal. A lighting effect that follows the size can be obtained.

  In the speaker of the present invention, the light-emitting layer is not clearly visible when light is not irradiated from the light source, the ON / OFF difference of the light-emitting design due to ultraviolet light is conspicuous, the design is excellent, and a large presentation effect is given to the listener. Can be given.

  The speaker of the present invention is a speaker including a speaker diaphragm including a transparent base material and ultraviolet light emitting means for irradiating the speaker diaphragm with ultraviolet light. The speaker diaphragm has a front surface on the listener side and a back surface on the opposite side. A light emitting layer containing a fluorescent pigment having an average particle diameter of 1 μm or less is formed on at least one of the front and back surfaces of the transparent substrate 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 this visible light is visible from the front side of the speaker diaphragm, and the ultraviolet light emitting means does not irradiate the ultraviolet light. In this case, the light emitting layer is seen through, and the back side of the speaker diaphragm is viewed from the front side.

  Hereinafter, although the speaker by preferable embodiment of this invention is demonstrated, this invention is not limited to these embodiment.

  FIG. 1 is a schematic cross-sectional view of a speaker 1 according to a preferred embodiment of the present invention. The speaker 1 includes 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 portion 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 an input audio signal, and drives the speaker diaphragm 5 by displacing the magnetic gap. The vibration system formed by the speaker diaphragm 5 and the voice coil bobbin 2 is supported by the edge 6 and the damper 7 so as to vibrate in the Z direction shown in the figure. The outer peripheral sides of the edge 6 and the damper 7 are fixed to a frame 8 connected to the magnetic circuit 4. When the speaker diaphragm 5 vibrates, sound waves as sparse and dense waves are generated in the air, and as a result, sound is reproduced from the speaker 1.

  The magnetic circuit 4 of the present embodiment is an external magnetic type magnetic circuit including a pole, a plate, and a magnet, and includes a cancel magnet and a cover 9 that covers the magnetic circuit. The voice signal is supplied to the voice coil 3 via a terminal (not shown) and a tinsel wire K (not shown). The speaker diaphragm 5 has a substantially spherical shell shape, and the concave surface 5a side is the front surface, and the convex surface 5b side is the back surface. On the back side, the voice coil bobbin 2, the voice coil 3, the magnetic circuit 4, the damper 7, and the tinsel wire K are disposed. The magnetic circuit 4 may be another internal magnet type magnetic circuit or a repulsive magnetic circuit.

  A speaker illumination device 10 including an LED 12 that irradiates ultraviolet light is attached to the speaker 1 of the present embodiment. Specifically, the speaker illumination device 10 includes an attachment member 11 that fits into a through hole of a pole that constitutes the magnetic circuit 4, an LED 12 that is attached to the attachment member 11, a signal line 13 that supplies power to the LED 12, including. Therefore, the speaker illumination device 10 is arranged so as to irradiate ultraviolet light from the back side of the speaker diaphragm 5.

  FIG. 2 is a perspective view of the speaker 1 of the present embodiment as seen from the front side. As will be described later, the speaker diaphragm 5 is a speaker diaphragm having a transparent heat-resistant glass as a base material. Therefore, in the speaker 1, as shown in FIG. 2, the voice coil bobbin 2, the voice coil 3, the center pole of the magnetic circuit 4, the damper 7, and the tinsel wire K are located on the back side of the speaker diaphragm 5. Through the speaker diaphragm 5, it 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.

  Note that the speaker 1 of the present embodiment has a substantially spherical shell-shaped speaker diaphragm having the same shape (not shown), and the speaker diaphragm (not shown) is made of a transparent heat-resistant glass speaker vibration. The speaker is replaced with the plate 5. For example, the speaker diaphragm of the comparative example has a base material impregnated with a thermosetting resin, the base material is a laminate including a natural fiber woven fabric layer and a natural fiber non-woven fabric layer, and the thermosetting resin is Any suitable thermosetting resin such as unsaturated polyester can be employed. That is, in the speaker 1 of this embodiment, the components other than the transparent heat-resistant glass speaker diaphragm 5 can share the components of the conventional electrodynamic speaker.

  The speaker diaphragm 5 has a transparent diaphragm portion 5s having a substantially circular shape in front view defined as a part of a spherical shell having a large radius. The transparent diaphragm portion 5s includes a concave surface 5a on the front side and a concave surface 5a on the front side. It includes a corresponding back-side convex surface 5b and an outer peripheral edge 5c that defines the outer diameter thereof. 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. Since the transparent diaphragm portion 5s of the speaker diaphragm 5 is made of transparent heat-resistant glass, 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 this range, the thin film is formed almost uniformly. In addition, the weight of the speaker diaphragm 5 of a present Example is about 11.5g.

  The speaker diaphragm 5 is a speaker diaphragm made of heat-resistant glass as a base material, and is formed using at least silica sand, borax, boric acid, alumina, and salt as raw materials. Compared to soda-lime glass (normal glass), which is mainly made of silica sand, lime, soda ash, etc., heat-resistant glass is resistant to sudden temperature changes, soda lime glass and crystals. It has the characteristic that specific gravity is small compared with glass etc. The heat-resistant glass has a high viscosity at the time of molding, can be thinly processed into the shape of a substantially spherical shell-shaped speaker diaphragm by blow molding, and is advantageous in the process of cutting at the position of the outer peripheral edge 5c. Moreover, since the heat resistant glass can be made thinner, the overall weight of the speaker diaphragm 5 can be further reduced, and therefore, it is suitable for use as a speaker diaphragm as compared with conventional soda-lime glass.

  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. Since the light emitting layer 5x has a very small average particle diameter of the fluorescent pigment of 1 μm or less, it is seen through when the LED 12 does not irradiate ultraviolet light. On the other hand, when the LED 12 emits ultraviolet light, the light emitting layer 5x 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, when the LED 12 is not irradiated with ultraviolet light, that is, when the light emitting layer 5x is not emitting light, the presence of the light emitting layer 5x is not clearly visible. As a result, the on / off difference can be highlighted. Furthermore, since the ON / OFF difference can be emphasized 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.

  Examples of the organic fluorescent pigment include resin particles containing a fluorescent dye. Any appropriate fluorescent dye can be adopted as the fluorescent dye. Specific examples include basic dyes, acid dyes, disperse dyes, oil-soluble dyes, fluorescent whitening dyes, and the like. Arbitrary appropriate resin can be employ | adopted as resin which forms a resin particle. Specific examples include acrylic resins, melamine resins, urethane resins, and polyester resins. Further, any appropriate method is adopted as a method for forming the light emitting layer 5x. As a specific example, there is a method in which a dispersion containing a fluorescent pigment is applied to any diaphragm surface of the speaker diaphragm 5 so as to obtain desired characters and patterns. The dispersion contains any appropriate dispersion solvent depending on the fluorescent pigment to be used, and examples of the dispersion solvent include water and organic solvents such as alcohol. In order to form the light emitting layer 5x on the speaker diaphragm 5, any appropriate method can be adopted as a coating method for applying this dispersion. Specific examples include screen printing, silk screen printing, transfer printing, pad printing, and the like.

  FIG. 3 is a diagram illustrating a speaker system 20 according to a preferred embodiment of the present invention. For example, the speaker system 20 configures an acoustic reproduction system by connecting the head unit 21, the amplifier 22, the battery 23, the illumination driving unit 24, and the speaker 1 attached to the cabinet 25. A DC voltage + Vcc is supplied from the battery 23 to the illumination driving unit 24. The direct-current voltage + Vcc of the battery 23 is a positive direct-current voltage, and the voltage + 12V or + 24V is frequently used when assuming on-vehicle use. In this embodiment, only one audio signal channel is shown, that is, a monaural signal is shown. However, in the case of a stereo signal including left and right signals, reproduction channels corresponding to the number of audio signal channels are selected. It may be provided. When the reproduction band is a low-frequency component and the speaker system 20 is an amplifier built-in subwoofer, a stereo signal may be mixed into a monaural signal.

  The audio signal output from the head unit 21 is input to the input terminal of the amplifier 22 and amplified, input from the positive and negative audio output terminals (+, −) to the input terminal of the speaker 1, and the illumination driving unit. 24 is also branched and input. The output of the illumination driving unit 24 is supplied to the speaker illumination device 10 of the speaker 1 through the terminal 14 to which the signal line 13 is connected. In other words, the speaker lighting 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 and reproduce the audio, Ultraviolet light is irradiated 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 low-frequency reproduction, and includes the amplifier 22, the battery 23, and the illumination driving unit 24. You may do it.

  FIG. 4 is a diagram illustrating an example of the illumination driving unit 24. As described above, the illumination driving unit 24 is connected in parallel to the speaker 1 when viewed from the output of the amplifier 22. That is, audio signals amplified and output from the positive and negative audio output terminals (+, −) of the amplifier 22 are input to the speaker 1, while being input to the positive and negative audio input terminals of the illumination driving unit 24. Is also entered. A constant current diode 15, a primary side LED 16 a of a photocoupler 16 that is electrically insulated from a secondary side connected to the LED 12, and a protection diode 17 are connected in series between audio input terminals of the illumination driving unit 24. Connect to. The secondary side transistor 16b of the photocoupler 16 is grounded at the emitter side and connected to the LED 12 at the collector side. The direct current voltage + Vcc of the battery 23 is supplied to the LED 12 through the resistor 19.

  In the illumination drive unit 24, when the voltage (A) of the audio signal is a sine wave, the current (B) flowing through the voice coil of the speaker 1 and the currents (C) and (D) in the speaker illumination device 10 will be described. . In the diode, when a positive voltage applied when a current flows from positive to negative is a forward voltage, and a negative voltage opposite to the positive voltage is a reverse voltage, the constant current diode 15 has a forward voltage of a certain value or more. Then, the current starts to flow in one direction, and when the voltage further increases, the current that flows above a certain value is limited to a constant current. In the illumination driving unit 24, since the constant current diode 15 and the primary side LED 16a of the photocoupler 16 are connected in series, the forward voltage of the audio signal (voltage (A)) input to the speaker 1 (that is, positive) 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, the current flows between the collector and emitter of the secondary side transistor 16b of the photocoupler 16. The flow begins (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 direct current flows through the LED 12 (current (D)), and as a result, the LED 12 emits ultraviolet light. When the photocoupler 16 is used, a switching operation is possible even with a DC signal, so that the lighting effect linked to the audio signal can be applied even to an audio signal with a very low frequency, which is a problem in a conventional circuit using a transformer or a coupling coil. Can be obtained.

  The illumination drive unit 24 and the speaker illumination device 10 of the present embodiment cause the LED 12 to emit light according to the amplitude of the audio signal input to the speaker 1, giving a visual stimulus to the listener, and a greater presentation effect. Can be given. By adjusting the resistor 19 that determines the direct current (D) flowing through the LED 12, the audio signal voltage input to the speaker 1 follows the audio signal voltage from a voltage that is somewhat low, and the dynamic range of the audio signal is taken into account. Lighting effect can be obtained.

  FIG. 5 illustrates a light emitting design that can be seen from the front through the transparent speaker diaphragm 5 when the LED 12 of the speaker illumination device 10 irradiates the speaker diaphragm 5 with ultraviolet light in the speaker 1 of this embodiment. It is a figure to do. 5 (a) and 5 (b) are perspective views of the speaker 1 as seen from the obliquely upper front side. FIG. 5 (a) shows the result of the LED 12 irradiating the speaker diaphragm 5 with ultraviolet light. FIG. 5B shows a case where the LED 12 does not irradiate the speaker diaphragm 5 with ultraviolet light and the light emitting layer 5x is seen through. .

For example, in the case of this example, fluorescent pigment dispersion A (manufactured by Sinloihi Co., Ltd., SF-5000, fluorescent pigment average particle size: 0.1 μm, fluorescent pigment excitation wavelength: 140 to 400 nm, fluorescent pigment The density is 0.5 to 3.5 g / cm ³ ), and the screen is printed, for example, “ONKYO” near the center of the convex surface 5b on the back side of the transparent speaker diaphragm 5 made of heat-resistant glass. A light emitting layer 5x having a desired shape such as a character string (logo) was formed. In the transparent speaker diaphragm 5 having the concave surface 5a on the front side, the logo cannot be visually recognized when the LED 12 does not irradiate the light emitting layer 5x with ultraviolet light as shown in FIG. 5B. On the other hand, as shown in FIG. 5A, when the LED 12 irradiates the light emitting layer 5x with ultraviolet light, a logo formed by the light emitting layer 5x can appear inside the cylindrical voice coil bobbin 2.

  That is, in the speaker 1 of the present embodiment, when the LED 12 of the speaker illumination device 10 irradiates the light emitting layer 5x with ultraviolet light, the light emitting layer 5x formed on the back side of the speaker diaphragm 5 emits visible light, and the visible light is emitted. Light passes through the speaker diaphragm 5 made of transparent heat-resistant glass as a base material and is viewed from the front side of the speaker diaphragm 5. As a result, a light emitting design with a logo formed by the light emitting layer 5x appears. Further, when the irradiation of the ultraviolet light from the LED 12 is stopped, the speaker 1 is recognized from the front side as the speaker 1 including the transparent speaker diaphragm 5 through which the back side is seen through. As described above, since the ON / OFF difference of the light emitting design is remarkably larger than the conventional one, it is possible to realize a speaker excellent in effect.

  In the speaker 1 of the present embodiment, the light emitting layer 5x is formed on the back side of the speaker diaphragm 5, so that 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 back side of the speaker diaphragm 5, the concave surface 5a on the front surface is undulated due to the thickness of the light emitting layer, or the reflection state on the concave surface 5a is changed. This 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 base material of the speaker diaphragm 5 but also on the front side of the concave surface 5a, and is formed at an arbitrary position on the concave surface 5a and / or the convex surface 5b. May be.

  In the speaker 1 of the present embodiment, the speaker diaphragm 5 made of transparent heat-resistant glass as a base material is formed to be almost uniformly thin in the range of 0.3 mm to 1.2 mm. Repeats reflection inside the speaker diaphragm 5. The reflected light scatters when it hits a portion where the adhesive is applied to a portion where the voice coil bobbin 2 is attached or a portion where regular reflection is hindered, such as the outer peripheral edge portion 5c of the speaker diaphragm 5. Emits visible light. Therefore, as shown in FIG. 5, not only the light emitting design by the logo formed of the light emitting layer 5x but also part of the components such as the speaker diaphragm 5 or the voice coil bobbin 2 emit light, so that the speaker with excellent production effect. Can be realized.

  Since the thickness of the transparent diaphragm portion 5s of heat resistant glass can be formed almost uniformly thin by making it a part of a spherical shell by blow molding, the speaker 1 including the speaker diaphragm 5 of the heat resistant glass of this embodiment is a conventional one. A high reproduction sound pressure level can be realized in the case of a flat glass or in the case of a common glass having a large thickness. However, the speaker diaphragm 5 is not limited to heat resistant glass, but may be soda lime glass (normal glass) mainly made of silica sand, lime, soda ash, or the like. The speaker diaphragm 5 may be a transparent acrylic resin diaphragm. Even in the case of the ordinary glass or acrylic resin speaker diaphragm 5, the back side is seen through, so that a 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) Thus, it is possible to realize a speaker that has an excellent rendering effect in which the ON / OFF difference of the light emitting design is significantly greater than that of the conventional art.

  In the illumination drive unit 24 and the speaker illumination device 10 of the present embodiment, the light emission amount of the LED 12 having a higher effect can be set in consideration of the dynamic range of the audio signal. Of course, the illumination drive unit 24 is further simplified. A configuration may be adopted in which a direct current is applied to the LED 12 without using an audio signal, and light may be emitted constantly. Further, the LED 12 may be a black light LED that emits ultraviolet light or a UV-LED, and may be a black light lamp that emits ultraviolet light depending on circumstances.

  Of course, the application of the speaker 1 including the speaker illumination device 10 is not limited to the subwoofer with a built-in amplifier. The speaker 1 may be a full-range speaker that reproduces the entire band, or may be a tweeter that reproduces the high band in some cases. As long as the speaker illumination device 10 includes the LED 12, the speaker illumination device 10 may include an attachment member 11 adapted to the configuration of the other magnetic circuit 4.

  The speaker of the present invention can be suitably applied to a speaker used for various purposes (for home use and in-vehicle use). Furthermore, the present invention can be applied to any speaker such as a woofer that reproduces a low frequency region or a tweeter that reproduces a high frequency region. The speaker diaphragm of the present invention can be applied not only to a speaker but also to a headphone and a microphone including the diaphragm.

It is a schematic sectional drawing of the speaker 1 by preferable embodiment of this invention. (Example 1) It is the perspective view which looked at the speaker 1 of the Example by preferable embodiment of this invention from the front diagonal. (Example 1) It is a figure explaining the speaker system 20 by preferable embodiment of this invention. (Example 1) It is a figure explaining the Example of the illumination drive part. (Example 1) It is a figure explaining the light emission design seen from the front through the transparent speaker diaphragm 5 of the speaker of this invention. (Example 1)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Speaker 2 Voice coil bobbin 3 Voice coil 4 Magnetic circuit 5 Speaker diaphragm 5s Transparent diaphragm part 5a Concave surface (front surface)
5b Convex surface (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 Photocoupler 17 Protection diode 20 Speaker system 21 Head unit 22 Amplifier 23 Battery 24 Illumination drive unit 25 Cabinet

Claims (4)

A speaker diaphragm including a transparent substrate having a front surface on the listener's side and a back surface on the opposite side;
An ultraviolet light emitting means for irradiating the speaker diaphragm with ultraviolet light, and a speaker comprising:
A light emitting layer containing a fluorescent pigment having an average particle diameter of 1 μm or less is formed on at least one of the front and back surfaces of the transparent base material 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, the visible light is viewed from the front side of the speaker diaphragm, and the ultraviolet light emitting means is A speaker in which the light emitting layer is seen through when light is not irradiated. The light emitting layer is formed on the back surface of the transparent substrate;
The ultraviolet light emitting means is arranged to irradiate the light emitting layer with ultraviolet light from the back side of the speaker diaphragm,
The speaker according to claim 1, wherein visible light emitted from the light emitting layer is visible from the front side of the speaker diaphragm through the transparent substrate.   The speaker according to claim 1 or 2, wherein the transparent base material of the speaker diaphragm is formed of ordinary glass or heat-resistant glass. 4. The speaker diaphragm according to any one of claims 1 to 3, the ultraviolet light emitting means, an edge fixed to an outer peripheral edge of the speaker diaphragm, and a voice attached to substantially the center of the speaker diaphragm. A coil bobbin, a coil wound around the voice coil bobbin, a magnetic circuit having a magnetic gap for disposing the coil, a damper fixed to the voice coil bobbin, the edge, the damper, and the magnetic circuit And a frame to be
A speaker in which the ultraviolet light emitting means includes a black light lamp or an ultraviolet light emitting diode.