KR19990028818U - TV volume control circuit - Google Patents

Abstract

The present invention relates to a volume control circuit of a television, the VR controller 610 for controlling the volume of the audio output of the speaker by controlling the audio amplifier 430, and outputs a predetermined voltage when the TV is powered on the VR Comparing means 620 for adjusting the controller 610, and the memory 630 for outputting the volume signal value stored at the power-off to the comparison means 620, to increase the volume of the volume and to watch Even when the power is turned off, when the power is turned on at night or in a quiet situation, the comparison means receiving the volume size information of the last data stored in the memory is limited to a value smaller than the set value and outputted to the VR controller. Even if you do not operate a separate volume key, there is an effect that does not output a large volume.

Description

A circuit for controling volume in a television

The present invention relates to an audio receiving circuit of a television, and more particularly, to a volume control circuit of a television which prevents the volume information from being output at a predetermined level by comparing the volume information stored in the last data with a predetermined value when the television is powered on. will be.

The configuration of a general television is as shown in the schematic block diagram shown in FIG. 1, the image receiving circuit 100, the synchronous deflection circuit 200, the water pipe 300, the audio receiving circuit 400 and the speaker 500. It consists of.

That is, the image receiving circuit 100 selects and amplifies the channel radio wave received from the antenna 110 to convert the signal frequency into an intermediate frequency and outputs the tuner 120 and the intermediate frequency signal output from the tuner 120. An intermediate frequency amplifier circuit 130 for amplifying an image output to increase an image output, an image detector circuit 140 for obtaining a composite image signal from an image intermediate frequency signal of an amplitude modulated signal from the intermediate frequency amplifier circuit 130, and the image detector An image amplification circuit 150 for amplifying the luminance signal from the composite image signal obtained by the circuit and then outputting the amplified luminance signal, the carrier color signal, the synchronization signal, and the color buster to the next stage, and the transfer signal transmitted from the image amplification circuit. The luminance signal amplified by the color reproduction circuit 160 and the image amplification circuit 150 and the color difference signal obtained by the color reproduction circuit 160 are converted into R, G, and B signals. Comprises a matrix 170 for outputting to said kinescope (300).

In this case, the synchronous deflection circuit 200 includes a synchronous separation circuit 210 for obtaining horizontal and vertical synchronous signals from a luminance signal, and a vertical deflection circuit for applying saw blades of 60 Hz to the vertical deflection coils of the water pipe 300 ( 220) and a horizontal deflection circuit 230 for applying a saw blade wave of 15750 Hz to the horizontal deflection coil of the water pipe 300.

In addition, the voice receiver circuit 400 includes a voice intermediate amplifier circuit 410 for amplifying a voice intermediate frequency signal, an FM detector 420 for obtaining a low frequency signal from the voice intermediate frequency, and a weak signal from the FM detector 420. The audio amplifier 430 is configured to output a low frequency signal by amplifying power and outputting the volume to the speaker 500.

On the other hand, the voice circuit 400 may be adjusted by the volume control signal input to the volume control terminal (not shown) or the remote control installed in the front of the TV 500 the volume of the audio signal.

However, in the conventional television configuration described above, when the power of the television is turned off, the microcomputer (not shown) built in the television stores the volume information when the power is turned off. The output of the audio signal is controlled.

Therefore, if you watch too loud and then turn off the power, the last information is stored to increase the volume, which requires quieting so as not to disturb other people's faces at night. In addition, when the infant and the elderly are around when the power is turned on, the speaker suddenly outputs a loud sound, there is a problem that disturbs when the infant and the elderly, such as surprise or require quiet.

Therefore, the present invention is to solve the above problems, and compares the volume information output from the last information stored at the time of power-on of the television with a predetermined value to control the output of the speaker to a predetermined size or more to prevent the TV The purpose is to provide a volume control device of the.

The television volume control device of the present invention for achieving the above object,

The memory which stores various last data such as channel information and volume level information at the time of power-off of the television, and the volume information outputted from the memory at power-on are compared with the set value and bypassed when the size is small. Comparing means for outputting a value, and a VR controller to adjust the volume level output to the speaker by controlling the audio amplifier according to the output value of the comparison means.

According to the present invention having the above-described configuration, when the power is turned on in a situation where a loudness is required and the power is turned off during the day and the power is turned off at night or in a quiet situation, the comparing means outputs the last data output from the memory. Compared to a predetermined value, the volume signal value is controlled to be output below a certain value, thereby preventing sudden output of a large volume even without a separate volume key operation.

1 is a block diagram schematically showing an entire circuit of a conventional television;

2 is a block diagram of a television according to the present invention;

3 shows a circuit diagram of the comparison means of the present invention.

Explanation of symbols on main parts of drawing

100: video receiving circuit 110: antenna

120: tuner 130: intermediate frequency amplifier circuit

140: image detection circuit 150: image amplification circuit

160: color reproduction circuit 170: matrix

200: synchronous deflection circuit 210: synchronous separation circuit

220: vertical deflection circuit 230: horizontal deflection circuit

300: water pipe 400: voice receiving circuit

410: voice intermediate frequency amplifier circuit 420: FM detector

430: voice amplifier circuit 500: speaker

600: volume control circuit 610: VR controller

620: micom

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

2 is a view showing a television receiving circuit according to the present invention as a whole, the image receiving circuit 100, the synchronous deflection circuit 200, the water pipe 300, the voice receiving circuit 400, the speaker 500, and It consists of a volume control circuit 600.

Here, the voice receiving circuit 400 converts the channel radio wave received from the antenna 110 into an intermediate frequency signal at the tuner 120, and amplifies the intermediate frequency signal from the intermediate frequency amplifier circuit 130 and outputs the complex signal. It receives a signal and outputs a voice signal to the speaker 500.

Here, the voice receiver circuit 400 includes a voice intermediate amplifier circuit 410 for amplifying a voice intermediate frequency signal, an FM detector 420 for obtaining a low frequency signal from the voice intermediate frequency, and a weak low frequency signal from the FM detector 420. It is composed of an audio amplifier 430 that is output to the speaker 500 by amplifying the power to adjust the volume.

Meanwhile, the volume control circuit 600 controls the audio amplifier 430 to control the volume of the audio output of the speaker, and outputs a predetermined voltage when the TV is powered on. Comparing means 620 for adjusting 610, and a memory 630 for outputting the volume signal value stored at power off to the comparing means 620.

Here, the VR controller 610 normally controls the audio amplifier circuit 430 by the volume control signal input through the volume control button or the remote controller provided on the front of the TV to output the audio signal size from the speaker 500. Will be adjusted.

In addition, the comparison means 620 receives an output value corresponding to the voice size information output from the memory 630 and compares it with a setting value and bypasses it when it is small, and when it is large, outputs a value corresponding to the setting value. Therefore, the output value is controlled to output below a certain size.

3 is a circuit diagram showing an embodiment of a comparison means of the present invention, a comparator 622 for receiving a volume size information value output from a memory into an inverting terminal and a setting value for a non-inverting terminal, and the comparator ( The NAND gate 624 receives an output value of 622 and an output value of the memory 630, and an inverter 626 receives an output value of the NAND gate 624.

Comparing means having such a configuration can also be implemented using a microcomputer.

The memory 630 stores last information such as channel information such as channel information when the TV is turned off by a control operation of a microcomputer (not shown), and then controls various circuits when the power is turned on. To reproduce the situation at power off.

The television volume control circuit of the present invention configured as described above controls the output volume of the television by the VR controller 610 by manipulating the volume control button provided on the television or manipulating a remote control, if necessary. In the case of turning off, various situation information such as channel information and volume information is stored in the memory 630 as last data through the microcomputer 620. When the power is turned on, the microcomputer reproduces the viewing information of the television by controlling the corresponding circuit according to the last data stored in the channel information.

In this case, the memory 630 outputs voice size information to the comparing means 620 among the last data stored under the control of the microcomputer, and the output value of the memory is equal to or less than a predetermined size in comparison with the set value as it is. Output to 610 to reproduce the voice size.

However, when the voice size information input to the comparing means is larger than the set value, the set value input to the non-inverting terminal of the comparator is output to the VR controller 610 to adjust the volume output from the voice receiving circuit to a constant size. It is supposed to be.

On the other hand, the setting value of the comparison means 620, that is, the reference volume can be arbitrarily set by the television user.

According to the present invention having the above-described configuration, the viewer turns off the power while watching the TV aloud, and then turns on the power of the television when a quiet atmosphere is required, such as at night or by other infants and the elderly. Even in the case of power-off, the voice signal is outputted as it is, instead of being output as a voice signal according to the volume information stored at all times.

Claims (2)

The VR controller 610 which controls the volume of the audio output of the speaker by controlling the audio amplifier 430, and the comparison means 620 which adjusts the VR controller 610 by outputting a predetermined voltage when the TV is powered on. And a memory (630) for outputting a volume signal value stored at power-off to the comparing means (620). The volume control circuit of claim 1, wherein the comparing means (620) is implemented as a microcomputer.