JPH0317351Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a volume control device that adjusts the output level of an amplifier, tape recorder, etc., and relates to a set volume display device that displays the volume set by the volume control device.

Conventionally, light emitting diodes and fluorescent display tubes have been used to display the volume set by a volume control device such as a volume control device that adjusts the output level in an amplifier, etc.
A set volume display device has been developed that sequentially lights up and displays the set volume according to the set volume.

Incidentally, in these amplifiers, volume attenuation and muting are used to temporarily attenuate the volume. Conventionally, the method of indicating that the above-mentioned attenuator or muting operation has been performed is as follows: If the switch is a mechanical switch (lock type), it is determined whether it is on or off based on the position of the switch, and if it is an electronic switch, an independent indicator is provided to display the attenuator on, and the blinking of the indicator determines whether the switch is on or off. It was determining whether it was on or off.
Therefore, it has the disadvantage that it is difficult to judge whether the attenuator or mutating is on or off in the former case, and although it is easy to judge whether the attenuator or mutating is on or off in the latter case. , a light-emitting element and a circuit are required to display the on/off status of the attenuator and mutating, which increases cost and requires two types of display: volume display and on/off display.
The drawback was that you had to look at the two.

On the other hand, the above-mentioned setting volume display device does not matter whether the attenuator or muting is on or off.
It is displayed in the same state.

Therefore, the present invention aims to display the on/off status of the attenuator and muting by using this setting volume display, and the purpose is to display only the display device for displaying the volume. Therefore, it is possible to provide a set volume display device that allows the user to know the on/off state and also allows the display of the on/off state of an attenuator or muting using a simple circuit without providing a new light-emitting element exclusively for display. be.

Next, embodiments of the present invention will be described with reference to the drawings.

In the figure, 1 is the volume up switch, 2 is the volume down switch, and 3 is the amount of time that the up switch 1 or the down switch 2 is turned on, or the number of times the switches 1 and 2 are turned on. 4 is an electronic volume that controls the signal output level in proportion to the output of the volume controller 3; 5 is a signal source; the signal from the signal source 5 is connected to the electronic volume; The level is adjusted by 4. 6 is an attenuator circuit for lowering the level of the output from the electronic volume 4; 7 is a set volume display circuit that sequentially sends output to the output terminals _Q1 to _Q8 according to the output voltage from the volume controller 3; 8 is a set volume display circuit; The light emitting diode is activated by the output from the set volume display circuit 7.
This is a drive circuit for sequentially lighting up _D1 to _D8 . S is an attenuator switch, with one end connected to ground and the other end connected to the power supply via a resistor R. A ₁ to A ₇ are AND circuits whose input ends are connected to the output terminals Q ₂ to _{Q 8} of the set volume display circuit 7, respectively.

9 is a display blinking oscillation circuit whose output terminal is connected to the other input terminal of all the AND circuits _A1 to _A8 , and whose input terminal is connected to the connection point between the attenuator switch S and the attenuator circuit 6. This display blinking oscillation circuit 9 outputs a high level when the attenuator switch S is off, and outputs a clock pulse when the attenuator switch S is on.

Next, to explain the operation based on the above circuit,
Now in normal state, that is, attenuator switch S
When the circuit is off, the AND circuit
One end of the inputs of A ₁ to _{A 7} is at high level.
Therefore, the light emitting diodes D ₁ to _{D 8} are sequentially turned on in accordance with the output from the set volume display circuit 7. For example, when the output from the set volume display circuit 7 is sent out up to _Q6 , the light emitting diodes _D1 to _D6 are turned on via the drive circuit 8 as shown in FIG. In other words, this light emitting diode
D ₁ to D ₈ are lit in a number corresponding to the gain adjustment of the signal system by operating the volume up and down switches 1 and 2.

Next, when the attenuator switch S is closed, the attenuator circuit 6 operates to lower the output of the signal system. Further, when the switch S is closed, the display blinking oscillation circuit 9 sends out a clock pulse, so that the output from the set volume display circuit 7, for example, the output
If up to _Q6 are at high level, the light emitting diodes _D1 to _D6 are blinked, and the state shown in FIG. 3a and the state shown in FIG. 3b are alternately repeated.

Therefore, by observing this blinking state, it is possible to know that the attenuator is working. In addition, even in the blinking state, the light emitting diode
Since D ₁ to _{D 6} are lit intermittently, you can know the set volume.

Note that the above embodiment is based on the attenuator on/off mode.
Although the case where the muting circuit is linked to the OFF state has been described, by configuring the muting circuit in the same manner as described above, it is possible to cause the display of the set volume to flash in the same manner when the muting is activated.

As described above, the present invention displays the on/off status of the attenuator and muting by blinking the set volume display of the set volume display device, so the user can check the lighting state of the set volume display device. At a glance, you can judge whether the attenuator or muting is on or off as well as the set volume, and there is no need to install a new dedicated display, so it can be manufactured at low cost. It is something that you have.

[Brief explanation of the drawing]

Figure 1 is a circuit diagram of the setting volume display device according to the embodiment of the present invention, Figure 2 is a diagram showing the normal display state of the display in the embodiment, and Figure 3 is the display when the attenuator is turned on in the embodiment. It is a figure showing a state. 7...Set volume display circuit, 9...Oscillation circuit for display blinking, _A1 to _A8 ...AND circuit, S...Attenuator switch, _D1 to _D8 ...Light emitting diode.

Claims (1)

[Claims for Utility Model Registration] A signal corresponding to a set volume set by a volume control device is supplied from the volume control device to a display means having a plurality of light emitting elements, and the plurality of light emitting elements of the display means are controlled in a stepwise manner. In the set volume display device, which is turned on to display the set volume, the device operates according to the on state of the volume attenuator circuit or the muting circuit, and converts all of the signals that cause the light emitting element to light up. A signal conversion means is provided upstream of the plurality of light emitting elements of the display means, and when the volume attenuator circuit or the muting circuit is in an on state, all the light emitting elements that are lit to display the set volume of the display means A set volume display device, characterized in that the display device is configured to blink by the signal converting means.