JPS59230396A - Signal convertor - Google Patents

Abstract

PURPOSE:To obtain the device not requiring a power supply other than an input signal while keeping a high light emitting sensitivity by providing an electroacoustic transducing means and an electrooptic converting means, voltage-converting the input signal and applying the converted result to the electrooptic converting means. CONSTITUTION:An input signal from an amplifier 5 is inputted to a speaker device 11 from terminals 6, 7 and applied to a speaker main body 2 as the electroacoustic transducing means, where the signal is transduced acoustically by the conventional speaker operation. On the other hand, a current from the terminal 6 is shunted to the terminal 7 via the primary side of a transformer 11 and a resistor 14, resulting that a voltage in response to an AC voltage applied to the primary winding is induced to the secondary winding of the transformer 11, and the voltage is applied to the resister 14 and an LED3. Further, a series circuit comprising a Zener diode 12 and resistances 13, 14 is connected in parallel with the LED3 and the resistor 4, and even if an input voltage exceeds a prescribed value and the LED3 starts lighting, no excess voltage is applied to the LED3 by the operation of the Zener diode 12 and the device is protected from destruction.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a signal conversion device, and more particularly to a signal conversion device that converts an electrical input signal into an acoustic output and an optical output.

In a device that converts an electrical input signal into an acoustic output and at the same time converts a part of the input signal into a change in light corresponding to the acoustic output level, the input levels of the acoustic output and the optical output must be adjusted. How to make adjustments becomes an important issue. This problem will be explained in detail with respect to a speaker device configured to produce a light output in accordance with an acoustic output.

FIGS. 1 and 2 are diagrams schematically showing the configuration of this type of conventional speaker device. Referring to FIG. 1, the speaker body 2 is incorporated inside the speaker mount +ti,
Both terminals of this speaker device 2 are speaker input terminals 6.7
are connected to each. Further, a resistor 4 and a light emitting diode (LED) 3 are connected in series, and a speaker input terminal 6.
7 is connected in parallel with the speaker body 2.

The speaker input terminal 6.7 is connected to the output terminal of the amplifier 5 which supplies the input signal to this speaker device 1.

In such a device, an input signal applied to the speaker input terminal 6°7 is converted into an acoustic output in the speaker body 2, and the voltage is also applied to the LED 3 via the resistor 4, so that the LED 3 It emits light in a manner that corresponds to changes in the sound output level.

Therefore, by using this device, it is possible to capture sounds not only auditory but also visually, and to achieve a dramatic effect. However, the LED 3 does not emit light for all input voltages, and has the drawback that the forward voltage drop of the LED 3 "does not light for input voltages below 2", and the lighting sensitivity is low. In order to compensate for L
A device equipped with a separate power supply for ED3 is shown in FIG. In FIG. 2, the speaker main body 2 is connected to the inside of the speaker device 1 via the speaker input terminal 6.7, as in FIG. 1. Similarly, the light emission is performed by the LED 3 connected in series with the resistor 4, but in this case, the driving power for the LED 3 is inputted from the terminal 8.9 and supplied via the driving circuit 10. This drive circuit 1
0 is also connected to terminal 6, and its output changes in response to the strength of the input signal that will be input. Therefore, according to this configuration, by appropriately designing the drive circuit 10, the lighting sensitivity of the LED 3 can be set arbitrarily, and the low lighting sensitivity can be resolved. However, in addition to the amplifier circuit 5 for driving the speaker body 2, the drive circuit 10
A separate li! The disadvantage remains that lII must be connected using separate terminals.

The present invention has been made to eliminate the drawbacks of the conventional devices as described above, and it is possible to perform electro-acoustic conversion and electric-acoustic conversion with high conversion sensitivity without supplying a separate power source to the electro-optical conversion element. An object of the present invention is to provide a signal conversion device that can perform optical conversion.

In summary, the present invention has an electro-acoustic converting means and an electro-optical converting means, the latter having a configuration for converting the voltage of an input signal by the voltage converting means and supplying the input signal. A conversion device is provided.

EMBODIMENT OF THE INVENTION Hereinafter, the structure and operation|movement of the Example of this invention are demonstrated based on drawing, and the details of this invention are clarified. FIG. 3 is a diagram schematically showing the configuration of the first embodiment of the present invention. In FIG. 3, the speaker device 11 receives an input signal from the amplifier 5 through an input means, such as a terminal 6.7, and supplies this input signal to the speaker body 2. A circuit in which the primary side of the transformer 11 and the resistor 14 are connected in series is connected in parallel to the speaker body 2 with respect to this terminal 6.7. transformer 1
A resistor 4 and an LED 3 are connected in series to the secondary side of 1, and among the secondary terminals, terminal a corresponding to the primary side terminal A to which the resistor 14 is connected is connected to the resistor 14. is connected to terminal 7.

The other terminal on the secondary side is Zener diode 1.
2 and the resistor 13 to the primary side terminal B of the transformer 11.
It is connected to the. Next, the operation of this device 6- will be explained. The output of the amplifier 5 is inputted to the speaker system [1] from the input terminal 6.degree.7, and is applied to the speaker body 2 as an electro-acoustic conversion means. Therefore, the speaker main body 2 converts the input signal into sound through a normal speaker function. On the other hand, the current from terminal 6 is shunted to terminal 7 via the primary side of transformer 11 and resistor 14. Therefore, a voltage corresponding to the AC voltage applied to the primary side is induced on the secondary side of the transformer 11, and is applied to the resistor 4 and the LED 3. The voltage conversion ratio of this transformer 11 should be determined by the input signal voltage on the primary side and the characteristics of the electrical-optical conversion means connected to the secondary side. Here, the LED 3 is used as the electrical-optical conversion means. In this case, the forward voltage drop VF of the LED 3 is a problem as described above, so the turns ratio of the transformer 11 is larger than 1. If this winding ratio and therefore the step-up ratio are n, then the input voltage of the speaker device 1 is Vr
When /n is reached, the LED 3 starts to light up, so the lighting sensitivity of the LED 3 becomes n times higher than that of the conventional device shown in FIG. By the way, trans.

11, the speaker system [
It is also important to protect the LED 3 when the input signal voltage of the LED 3 becomes high. In this embodiment, a Zener diode 12. A series circuit consisting of a resistor 13 and a resistor 14 is
Since the secondary side of the transformer 11 is connected to the LED 3 and the resistor 4 in parallel, the secondary side of the transformer 11
When the voltage on the secondary side exceeds the Zener voltage of the Zener diode 12, the secondary side current is shunted through this, and the
Since this current passes through resistor 13 and resistor 14, resistor 1
4 increases, and the voltage applied to the primary side of the transformer 11 decreases, creating a negative feedback effect. Therefore, L.E.
No overvoltage is applied to D3, and LED3 is protected from destruction.

FIG. 4 is a diagram schematically showing the configuration of a second embodiment of the present invention. In this second embodiment, two of the transformers 11
A plurality of taps are provided on the next side, and each tap is connected to a resistor 4 and a series circuit of a Zener diode 12 and a resistor 13, respectively. Changeover switch 1
5, one of the taps is selected, and the resistor 4 corresponding to the tap is connected to the LED 3, and the series circuit of the Zener diode 12 and the resistor 13 is connected to one end B of the primary side of the transformer 11. With such a configuration, since the transformation ratios of the respective switching taps are different from each other, the lighting sensitivity of the LED 3 can be selected by switching the changeover switch 15.

FIG. 5 is a diagram schematically showing the configuration of a third embodiment of the present invention. In FIG. 5, a plurality of series circuits (four sets in FIG. 5) of a Zener diode 16, a resistor 4, and an LED 3 are connected in parallel to the secondary side of the transformer 11. The Zener voltage of the Zener diode 16 in each series circuit is 21%, the resistance value of the resistor 4 is Rs, and the LED 3 is L.
s (871.2.3.4). Also, transformer 11
It is assumed that the secondary side voltage of is V2, the voltage across the resistor R5 is VR5, and that Z + < Z 2 < Z s < Z 4.

In this case, if the forward voltage drop of LED3 is Vr, then
The following lighting operation is performed.

9- ■Z 1+■, +VR+ <V2 <Z 2 +V
When R, L lights up.

■ Z 2 +Vr 10VR2<V2 <Z a +V
When r, L and L2 light up.

■ Z 3 +Vr 10 VRs <V2 <Z 4 +
When in VF, L+, L2 and L8 light up.

■Z 4+VF +VR4<V2 When , L+, l-2, L- and L4 light up.

Therefore, L+, L2. L- and L4 are level indicators. Also, Zener diode 1
By appropriately selecting the Zener voltage of LED3
The lighting sensitivity can be set individually.

In the above embodiments, the speaker 2 is used as the electro-acoustic conversion means, the LED 3 is used as the electro-optic conversion element, and the transformer 11 is used as the input signal voltage conversion means, but the present invention is not limited to these. isn't it. That is, the electro-acoustic converter may be any device such as an earphone, headphone, piezoelectric buzzer, or bell, and the electro-optical converter may generally be an electroluminescent (EL) element, liquid crystal, or the like.

The voltage conversion means is not limited to boosting, but can be adjusted to the desired voltage conversion ratio depending on the characteristics of the electro-optical conversion element used! J" is fine.The use can be arbitrary, such as home use or car use.

According to the present invention described above, in the device U for converting an electrical input signal into an acoustic output and an optical output, an electrical
Since the input signal is supplied to the optical conversion means via the voltage conversion means, high luminescence sensitivity can be maintained even if the luminescence characteristics of the electro-optical conversion means have a threshold value. It is possible to obtain a device that does not require any other power source.

Furthermore, according to the first embodiment of the present invention, an LED is used as the electro-optical conversion element, and a Zener diode is connected in parallel to the LED, so that destruction of the LED due to overvoltage can be prevented. I can do it. In the second embodiment of the present invention, by providing a plurality of taps on the secondary side of the transformer, the light emission sensitivity of the LED can be freely selected. Roughly speaking, in the third embodiment, a plurality of LEDs are connected in parallel to the secondary side of the transformer, and each has a different luminous sensitivity, so it can be used as a simple and high level indicator of the input signal. It is possible to obtain a signal conversion device with a simple configuration and high sensitivity.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are diagrams showing an example of the configuration of a conventional signal conversion device. 3, 4 and 5 illustrate the first embodiment, second embodiment, and third embodiment of the present invention, respectively.
FIG. 2 is a diagram schematically showing the configuration of an embodiment. In the figure, 1 is the speaker device, 2 is the speaker body, 3 is the LED, 4, 13.14 is the resistor, 5 is the amplifier, 6, 7, 8 and 9 are the input terminals, and 10 is the drive circuit. , 11 is a transformer, 12 and 16 are Zener diodes, and 15 is a changeover switch. Leopard 1 Z diagram

Claims (7)

[Claims] (1) A signal conversion bag for converting an electrical input signal into an acoustic output and an optical output, comprising: an input means for receiving the input signal; and an input means connected to the input means for converting the input signal into an acoustic output. an electro-acoustic conversion means for converting the input signal; a voltage conversion means connected to the input means in parallel with the electro-acoustic conversion means for converting the voltage of the input signal; and an input signal whose voltage has been converted by the voltage conversion means. A signal converting device comprising at least one electrical-to-optical converting means for converting the signal into an optical output. (2) The signal conversion device according to claim 1, wherein the electric-acoustic conversion means is a speaker, and the voltage conversion means is a transformer. (3) The signal conversion device according to claim 1 or 2, wherein the electrical-optical conversion means is a light emitting diode. (4) Claims 1 to 3 further include a constant voltage element connected in parallel to the electro-optical conversion means, wherein the voltage conversion means is means for boosting the voltage of the input signal. The signal conversion device according to any one of. (5) The constant voltage element is a Zener diode, and one of the terminals on the primary side of the voltage conversion means and the input means are connected via a first resistor,
A series circuit including the Zener diode, the first resistor, and the second resistor is connected in parallel to the electrical-to-optical converting means with respect to a secondary terminal of the voltage converting means. The signal conversion device according to scope 4. (6) the voltage conversion ratio of the voltage conversion means is variable;
A signal conversion device according to any one of claims 1 to 5. (7) The signal according to any one of claims 1 to 6, wherein when there is a plurality of electric-to-optical conversion means, the threshold values for the electric-to-optical conversion are different from each other. conversion device.