KR0134726Y1 - Auto-power-off device of wireless microphone - Google Patents

Abstract

The disclosed design relates to an automatic power off of a wireless microphone. The device of the disclosed subject matter is configured to detect the presence or absence of an audio signal input from an input of a wireless microphone, count the time when there is no signal input, and turn off the battery power switch when a specific time is reached. Therefore, the disclosed design prevents unnecessary consumption of battery power while the microphone is not used, thereby providing an effect of using the battery for a long time.

Description

Auto Power Off of Wireless Microphone

1 is a block diagram showing an automatic power off of the wireless microphone according to a preferred embodiment of the present invention.

FIG. 2 (a) is a waveform diagram of each part of the apparatus of FIG. 1 when a microphone is used, and FIG. 1 (b) is a waveform diagram of the parts of the apparatus when a microphone is not used.

* Explanation of symbols for main parts of the drawings

11 input unit 12 signal processing unit

13: power switch 14: microphone use detection means

15: AMP 16: Smoother

17: comparator 18: time counter

The present invention relates to a wireless microphone, and more particularly, to an automatic power off device of a wireless microphone, which can be automatically turned off when the wireless microphone is not used in a power-on state, thereby reducing battery usage. It is about.

Generally, a wireless microphone (MIC) is attached to a VTR or other audio device and used as a karaoke system. To use a wireless microphone, the battery power switch must be turned ON to process audio signals input through the wireless microphone. However, if the user does not turn off the power switch after using the microphone by turning the power switch ON, the battery power of the wireless microphone continues to be consumed. Therefore, there is an inconvenience in that the battery must be frequently replaced due to unnecessary power consumption.

Accordingly, the present invention provides an automatic power off device for a wireless microphone that prevents unnecessary power consumption of the battery by automatically turning off the power switch of the wireless microphone even when the user does not use the microphone to solve the above problem. have.

Automatic power off device of the wireless microphone according to the present invention for achieving the above object is a wireless microphone system using a battery, the power switch for supplying and cutting off the battery power, and when the power is supplied through the power switch And a signal processor which receives an audio signal and processes the signal, and detects the presence or absence of an audio signal, counts the time when there is no input of the audio signal, and controls the power switch to be turned off when a specific time is reached. Microphone use detection means.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing an automatic power off apparatus for a wireless microphone according to the present invention. As shown, the apparatus of the present invention supplies the input unit 11, the signal processing unit 12 for processing the audio signal input through the input unit 11, and the battery power supply (V _BAT ) to the signal processing unit 12 In the general wireless microphone system consisting of a power switch 13 to detect the use of the microphone, if the microphone is not used for a certain time, the microphone use detection means 14 for controlling the power switch 13 to be turned off (OFF) It includes more. The microphone usage detecting means 14 includes an amplifier 15 for amplifying the audio signal input through the input unit 11 of the wireless microphone to a predetermined size, a smoother 16 for smoothing the amplified audio signal, and a smoothed audio signal. A comparator 17 for comparing with the reference signal Ref, and a time counter 18 for counting the time according to the comparison result signal and outputting the control signal CTL to the power switch 13.

Operation of the automatic power-off device of the wireless microphone according to the present invention configured as described above will be described in more detail with reference to FIG.

FIG. 2 (a) is a waveform diagram of each part of the apparatus of FIG. 1 when a microphone is used, and FIG. 2 (b) is a waveform diagram of each part of the apparatus of the first diagram when the microphone is not used.

First, when the user intends to use the wireless microphone, the power switch 13 is turned on to supply the battery power V _BAT to the signal processor 12. At this time, the battery power (V _BAT ) is also supplied to each configuration of the microphone use detecting means (14). The user inputs a desired audio signal through the input unit 11 of the wireless microphone. The input audio signal is input to the signal processor 12 and to the amplifier 15 of the microphone use detecting means 14. The signal processor 12 processes the input audio signal. On the other hand, in the microphone use detecting means 14, the amplifier 15, when the audio signal is input through the input unit 11 of the wireless microphone, amplifies it to a certain size and outputs the ① signal of the second (a). On the other hand, if the audio signal is not input through the input unit 11 of the wireless microphone, that is, the user does not use the wireless microphone, the amplifier 15 outputs the ① signal of FIG. 2 (b). The smoother 16 receives the signal ① of the second (a) or the second (b) from the amplifier 15 and smoothes the signal of the second (a) or second (b) of the second (a) or second (b) diagram having a direct current component. Outputs Here, looking at the signal ② in FIG. 2 (b), it can be seen that the zero level is almost maintained. The comparator 17 compares the signal (2) in FIG. 2 (a) or 2 (b) applied from the smoother 16 with the reference signal Ref. The comparator 17 is inputted with the ② signal of FIG. 2 (a), which is larger than the reference signal Ref, and thus the comparison is the same as the ③ of the second (a) diagram of the High (H) level represented by the binary signal 1. Output the result signal. On the other hand, when the ② signal of FIG. 2 (b) is input, it is smaller than the reference signal Ref, and thus the comparison result signal as shown in ③ of FIG. 2 (b) of the Low (L) level represented by the binary signal 0 is represented. Outputs The time counter 18 does not perform a counting operation when the ③ signal of FIG. 2 (a) is input from the comparator 17, while the time counter 18 counts time from that time when the ③ signal of FIG. 2 (b) is input. To perform. The time counter 18 turns off the power switch 13 by applying the control signal CTL to the power switch 13 when the count time reaches a specific time (for example, about 3 minutes). If the? Signal in FIG. 2 (b) is applied from the comparator 17 while the time counter 18 is operating, the time counter 18 resets the count time and stops the counting operation. The power switch 13 is turned off when the control signal CTL is applied from the time counter 18 to cut off the supply of the battery power V _BAT .

As described above, the present invention relates to an automatic power-off device for a wireless microphone. When the wireless microphone is not used in a power-on state, the battery power is consumed as long as the user does not turn off the power switch. Compared to the prior art by detecting the use of the microphone automatically turns off the power (OFF) by preventing the unnecessary power consumption of the battery has the effect that can be used for a longer time.

Claims (4)

A wireless microphone system using a battery, comprising: a power switch for supplying and cutting off the battery power; A signal processor which receives an audio signal and processes the signal when power is supplied through the power switch; And a microphone use detecting means for detecting an input of an audio signal and counting a time when there is no input of an audio signal and controlling the power switch to be turned off when a specific time is reached. Off device. 2. The apparatus of claim 1, wherein the microphone use detecting means comprises: an amplifier for amplifying the audio signal to a predetermined size; A smoother for smoothing the amplified audio signal; A comparator for comparing the smoothed audio signal with a reference signal to detect an input of an audio signal, and outputting a comparison result signal; And a time counter for counting a time according to the comparison result signal and outputting a control signal to the power switch when the count time reaches a specific time. The smoothed audio signal of claim 2, wherein the comparator determines that the audio signal is input by using the wireless microphone when the smoothed audio signal is larger than the reference signal, and outputs a first signal. If it is small, it is determined that the audio signal is not input because the wireless microphone is not used, and outputs a second signal. 4. The time counter of claim 3, wherein the time counter does not operate when the first signal is applied from the comparator, and counts time thereafter when the second signal is applied, and resets the time count when the first signal is applied. Automatic power off device of the wireless microphone, characterized in that it does not work after.