JPH06164245A - Sound volume controller - Google Patents

Abstract

PURPOSE:To provide a sound volume controller which reduces the output sound volume to a low level in the case that the sound volume is set at a high level when a power supply is applied. CONSTITUTION:When a power supply is applied, a detector 2 detects a fact that a control volume 1 is set at a level higher than a prescribed level. Thus a timer circuit 5 counts the time and a control circuit 6 actuates an attenuator circuit 7 to reduce the output sound volume and also to show a warning at a display part 9. When the circuit 5 counts a prescribed time and transmits an output signal, the circuit 6 gradually cancels the attenuation of the circuit 7 and also gradually increases the output sound volume up to the level corresponding to the set value of the volume 1. At the same time, the display of the warning is canceled at the part 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a volume control device for audio equipment and the like.

[0002]

2. Description of the Related Art Conventionally, in audio equipment and the like, when the volume volume is set to a large value when the power is turned on, the audio signal is temporarily attenuated by the attenuator circuit and the attenuation is gradually released to make the volume The volume setting value is output suddenly, for example, to prevent the ear from being injured when wearing headphones and the speaker from being damaged by a large vibration, and to inform the user that the volume volume setting value is increasing. Was there.

[0003]

However, some music sources have a long interval between songs, that is, until an audio signal is transmitted, and when the power is turned on during that period, an attenuation effect can be expected. Instead, there was a problem that it was output suddenly at the set value of the volume control. Also, until the audio signal is sent out, even if the audio signal is attenuated by the attenuator circuit, the audio signal is not sent out, so no change appears in the output audio signal, and the user increases the volume control. There was a problem that I did not notice that I was there.

[0004]

SUMMARY OF THE INVENTION The present invention has been made for the purpose of solving the above-mentioned problems, and a volume adjusting device according to claim 1 adjusts the output volume when the power is turned on regardless of the set value of the volume control. When the power is turned on, a means for detecting that the volume control is at a predetermined level or higher, and a detection signal from the detection means for counting the time and outputting after counting the predetermined time Counting means for sending a signal, and in response to the detection signal from the detecting means, the sound volume is lowered to a predetermined level, and the sound volume corresponds to the set value of the sound volume by detecting the output signal from the counting means. A control means for gradually increasing the level is provided.

Further, in the volume adjusting device according to claim 2, the control means displays a warning in response to the detection signal from the detecting means, and the counting is performed in accordance with the detection of the output signal from the detecting means. The warning signal is stopped by detecting the output signal from the means.

[0006]

Therefore, when the detecting means detects that the set value of the volume control is equal to or higher than a predetermined level when the power is turned on, the counting means starts counting time in response to the detection.
The control means reduces the volume and displays a warning.
Then, the counting means outputs an output signal after counting for a predetermined time, and the control means gradually raises the sound volume to a level corresponding to the set value of the sound volume and, at the same time, cancels the warning display. As a result, the volume can be surely suppressed, and the user can be surely recognized that the set value of the volume is high.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an electrical configuration of a volume adjusting device according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing a result of output volume.

In FIG. 1, reference numeral 1 is an adjusting volume for adjusting the audio signals input to the L and R channels in conjunction with the volume control, and 2 is provided with a slider 3 which is associated with the adjusting volume 1 and is interlocked. This is a detector for detecting that the volume 1 is below a preset level, the point a corresponds to the maximum value of the adjusting volume 1, the point b corresponds to the preset level, and the point c is adjusted. This is the point corresponding to the minimum value of volume 1. In addition, a
A conductor is covered between −b and an insulator is covered between bc.

A detection circuit 4 sends a detection signal to the timer circuit 5 and the control circuit 6 based on the detection result from the detector 2, and 5 counts a time in response to the detection signal from the detection circuit 4 for a predetermined time. A timer circuit, which is a counting means for transmitting an output signal to the control circuit 6 after counting, 6 operates the attenuating circuit 7 in response to the detection signal from the detecting circuit 4 to attenuate the audio signal from the adjusting volume 1 and displays it. A warning is displayed on the display unit 9 via the circuit 8 and the attenuation of the attenuation circuit 7 is gradually released over a predetermined time in accordance with the detection of the output signal from the timer circuit 5 and the display unit A control circuit for canceling the warning display displayed at 9 is an amplification circuit for amplifying the audio signal from the attenuation circuit 7.

When the power is turned on, a voltage is applied to the terminal V of the detector 2. At this time, if the adjusting volume 1 is above a preset level, the slider 3 of the detector 2 interlocking with it is a
The voltage applied to the terminal V of the detector 2 is applied to the detection circuit 4 via the slider 3 because it is located between −b and is covered with a conductor between a−b, and the detection circuit 4 is thereby activated by the timer. The detection signal is sent to the circuit 5 and the control circuit 6. In response to the detection signal, the timer circuit 5 starts counting time, the control circuit 6 instructs the display circuit 8 to operate the attenuating circuit 7 and display a warning, and in response, the display circuit 8 causes the display unit to display. A warning is displayed on item 9.

In this state, when an audio signal is input to the L channel input and the R channel input, the adjustment volume 1 is adjusted to an arbitrary volume, but since the adjustment volume 1 is above a preset level, a predetermined value is set by the attenuation circuit 7. After being attenuated in level, it is amplified by the amplifier circuit 10 and output from a speaker or the like (not shown).

When the timer circuit 5 counts for a predetermined time, an output signal is sent from the timer circuit 5 to the control circuit 6, and the control circuit 6 detects it and gradually releases the attenuation circuit 7 over a predetermined time. The display circuit 8 is instructed to cancel the warning display, and in response thereto, the display circuit 8
Then, the warning display on the display unit 9 is canceled. Therefore, the output volume corresponding to the set value of the volume volume is output from the speaker or the like.

The change in the output volume at this time will be described with reference to FIG. The set value of the volume control when the power is turned on is an M value, and the M value at this time is equal to or higher than a preset level. Therefore, the output volume is reduced to a predetermined level N value over t ₁ hours, and is output at the N value level until t ₂ hours. Then, after a predetermined time (t ₂ −t ₁ ) has elapsed, a predetermined time (t ₃
-T ₂ ) to increase the output volume to a level corresponding to the M value that is the preset volume volume setting value, and t
Complete in ₃ hours.

Further, when the output volume attenuated by the attenuating circuit 7 is being output from a speaker or the like (not shown), when the set value of the volume control is lowered and the adjustment volume 1 becomes below a preset level, it is interlocked with it. Since the slider 3 of the detector 2 is located between b and c and the space between b and c is covered with an insulator, the voltage applied to the terminal V of the detector 2 is not applied to the detection circuit 4, The detection signal is not transmitted from the detection circuit 4. Accordingly, the timer circuit 5 clears the time count, and the control circuit 6 instructs the display circuit 8 to cancel the attenuation of the attenuation circuit 7 and the warning display. In response to this, the display circuit 8 displays the display unit. The warning display of 9 is canceled. Therefore, the output volume corresponding to the set value of the volume volume is output from the speaker or the like.

When the power is turned on and the adjustment volume 1 is below the preset level, the voltage is not applied to the detection circuit 4 because the slider 3 of the detector 2 is located between bc and No signal is sent. Therefore, the timer circuit 5
Does not count time, and the control circuit 5 does not operate the attenuation circuit 9 or display a warning.

When an audio signal is input to the L channel input and the R channel input in this state, it is input to the attenuation circuit 7 after being adjusted to an arbitrary volume by the adjustment volume control 1, but the attenuation circuit 7 is not operating. Therefore, the audio signal is not attenuated but is amplified by the amplifier circuit 10 and then output from a speaker or the like (not shown).

Therefore, when the power is turned on, the output sound volume is attenuated only when the set value of the sound volume is large.

Next, another embodiment will be described with reference to FIG. In FIG. 3, the same parts as those in FIG. 1 are designated by the same reference numerals.

In FIG. 3, reference numeral 11 is an automatic level control (hereinafter referred to as ALC) circuit for varying the gain of the amplifier circuit 10 in response to a control signal from the control circuit 6.

When the power is turned on and the adjustment volume 1 is above a preset level, the slider 3 of the detector 2 is a-
Since it is located between b, the voltage applied to the terminal V of the detector 2 is applied to the detection circuit 4 via the slider 3, and in response thereto, the detection circuit 4 sends a detection signal to the timer circuit 5 and the control circuit 6. To do. In response to the detection signal, the timer circuit 5 counts time, and the control circuit 6 causes the display section 9 to display a warning display via the display circuit 8 and controls the ALC circuit 11 to reduce the gain of the amplifier circuit 10. Let

In this state, when an audio signal is input to the L channel input and the R channel input, the volume is adjusted to an arbitrary volume by the adjusting volume 1, but since the adjusting volume 1 is above a preset level, the gain of the amplifier circuit 10 is increased. Is small, the output signal is suppressed to a low volume and is output from a speaker or the like (not shown).

When the timer circuit 5 counts for a predetermined time, an output signal is sent from the timer circuit 5 to the control circuit 6, and the control circuit 6 cancels the warning display displayed on the display unit 9 when the output signal is detected. ALC circuit 11
Is controlled to gradually return the gain of the amplifier circuit 10 to the original value over a predetermined time. As a result, an output signal corresponding to the set value of the volume control is output from the speaker or the like.

Further, when the set value of the volume control of the device is lowered while the output signal is suppressed to a low volume and the adjustment control 1 becomes below the preset level, the voltage is not applied to the detection circuit 4 and the detection is performed. No signal is sent. Along with this, the timer circuit 5 clears the count of time, the control circuit 6 cancels the warning display displayed on the display unit 9 and controls the ALC circuit 11 to restore the gain of the amplifier circuit 10 to the original value. Therefore, an output signal corresponding to the set value of the volume control is output from the speaker or the like.

It should be noted that when the power is turned on and the adjustment volume 1 is below a preset level, no voltage is applied to the detection circuit 4 and no detection signal is sent out. Therefore, the timer circuit 5 does not count time, and the control circuit 5 does not display a warning or operate the ALC circuit 11.

Therefore, when the power is turned on, the output signal is lowered only when the set value of the volume control is large.

[0026]

As described above, according to the present invention, the set value of the volume control when the power is turned on is detected by the detector, and when it is equal to or higher than the preset level, the control circuit lowers the audio signal to a predetermined level and the timer circuit. The output volume can be surely reduced by counting for a predetermined time or holding this state until the set value of the volume control is lowered.

The control circuit displays a warning on the display unit, and the timer circuit counts for a predetermined time or continues to display the warning until the set value of the volume control is lowered to inform the user of the set value of the volume control. Can be surely recognized to be large.

[Brief description of drawings]

FIG. 1 is a block diagram showing the electrical configuration of a volume control device that is an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a result of output volume.

FIG. 3 is a block diagram showing an electrical configuration of a volume adjusting device that is another embodiment of the present invention.

[Explanation of symbols]

 1 Adjustment Volume 2 Detector 3 Slider 4 Detection Circuit 5 Timer Circuit 6 Control Circuit 7 Attenuation Circuit 8 Display Circuit 9 Display Section 10 Amplification Circuit 11 ALC Circuit

Claims (2)

[Claims] 1. When the power is turned on, the output volume is suppressed to a low level irrespective of the volume volume set value, and when the power is turned on, a detection means for detecting that the set value of the volume is above a predetermined level. Counting means for receiving a detection signal from the detecting means, counting the time, and transmitting an output signal after counting a predetermined time; and reducing the sound volume to a predetermined level in response to the detection signal from the detecting means, A volume adjusting device comprising: a control means for gradually increasing the volume to a level corresponding to a set value of the volume volume in accordance with detection of an output signal from the counting means. 2. The control means displays a warning in response to a detection signal from the detecting means, and stops the warning display when the output signal from the counting means is detected. Item 1. The volume control device according to item 1.