KR19980027214U - Mono / Stereo Switchable Stereo Audio Output - Google Patents

Abstract

The present invention relates to a mono / stereo auto-switched stereo audio output device, in particular switch-coupled first and second audio input terminals interlocked by plug insertion to perform a switching operation; An L-channel audio processor connected directly to the first audio input terminal and connected to the second audio input terminal by a switching operation; An R-channel audio processor connected directly to the second audio input terminal and also connected to the first audio input terminal by a switching operation; And an output unit configured to output audio signals connected to the L channel audio processor and the R channel audio processor, respectively.

Therefore, the present invention is convenient because the audio output is output through both speakers regardless of the L and R positions of the audio connection terminals.

Description

Mono / Stereo Switchable Stereo Audio Output

The present invention relates to a voice output device for outputting to another system of stereo type when the audio source signal is mono, and in particular, mono / stereo audio output capable of outputting an audio signal selected as mono / stereo according to the audio operation mode. Relates to a device.

Recently, the audio signal of a disc player is connected to a video device such as a TV, a VCR, a projector, a liquid crystal, or an amplifier and output, so that the user is watching a video screen while listening to more three-dimensional and high-quality audio.

FIG. 1 is a circuit diagram illustrating a conventional audio output device, in which a switch driving signal is directly connected to first and second audio input terminals 10 and 12 interlocked by a plug insertion and the first audio input terminal 10. And an L channel audio processor 14 for outputting an L channel audio signal, an R channel audio processor 16 connected directly to the second audio input terminal 12 and outputting a switch driving signal and an L channel audio signal; A switch 18 switched in response to a switch driving signal output from the L-channel audio processor 14 and the R-channel audio processor 16, and the L-channel audio signal in response to driving of the switch 18; And an output unit 20 for outputting an R channel audio signal.

When the audio operation mode is monaural, when the L and R plugs are inserted into the first and second audio input terminals 10 and 12, respectively, the L-channel audio processing unit 14 disconnects the first audio input terminal 10. It transmits the L-channel audio signal input through, and generates a drive signal for driving the switch 18. The R channel audio processor 16 transmits an R channel audio signal input through the second audio input terminal 12 and generates a switch driving signal for driving the switch 18.

When the switch 18 is turned on by the switch driving signal output from the L and R channel audio processing units 14 and 16, the transmitted L and R channel audio signals are input to the output unit 20, respectively, so that the L and R channel signals are output. Output the same voice to the outside through the speaker.

In addition, when the audio operation mode is stereo, when the L plug and the R plug are inserted into the first and second audio input terminals 10 and 12, respectively, the L-channel audio processor 14 may perform the first audio input terminal 10. The L channel audio signal is input through the R channel audio processor 16, and the R channel audio processor 16 transmits the R channel audio signal input through the second audio input terminal 12.

In addition, the L-channel audio signal and the R-channel audio signals transmitted through the L and R channel audio processing units 14 and 16 are input to the output unit 20 in the same manner, and stereo sound is output to the outside through the L and R speakers. do.

FIG. 2 is a circuit diagram showing a conventional mono / stereo switchable audio output device, in which first and second audio input terminals 30 and 32 are interlocked by plug insertion, and directly to the first audio input terminal 30. An L-channel audio processing unit 34 connected to output an L-channel audio signal, an R-channel audio processing unit 36 directly connected to the second audio input terminal 32 to output an L-channel audio signal, and mounted in a set A first switch 38 which is switched in response to the mono / stereo switching key, a controller 40 which generates a control signal in response to driving of the first switch 38, and a control signal of the controller 40 And a second switch 42 which is switched in response to the second switch 42, and an output unit 44 which outputs the L channel audio signal and the R channel audio signal in response to the second switch 42.

When the L plug is inserted into the first audio input terminal 30, the L channel audio processing unit 34 transmits an L channel audio signal input to the first audio input terminal 30. In addition, when the R plug is inserted into the second audio input terminal 32, the R channel audio processor 36 transmits an R channel audio signal input to the second audio input terminal 32.

When the first switch 38 is turned on by selecting the audio operation mode through the mono / stereo switching switch mounted on the display set, the turned-on driving signal is input to the controller 40 to generate a control signal.

The second switch 42 is turned on by the control signal output through the controller 40 to output the L channel audio signal and the R channel audio signal transmitted to the output unit 44.

1 and 2, the audio output device configured as described above may output stereo audio by connecting a mono audio signal to a stereo video device, thereby enabling stereo sound of higher quality.

However, such a voice output device has a inconvenience in that the user must check and connect the L and R positions of the audio connection terminal and the user may select the mono / stereo switching switch so that stereo sound is output. .

The purpose of the present invention is to solve the problems of the present invention as described above, even if the user connects to any terminal irrespective of the position of the audio connection terminal, the audio output can be output through both speakers mono / stereo auto The present invention provides a switchable stereo audio output device.

In order to achieve the above object, the device of the present invention comprises: switch-coupled first and second audio input terminals interlocked by plug insertion to perform a switching operation; An L-channel audio processor connected directly to the first audio input terminal and connected to the second audio input terminal by a switching operation; An R-channel audio processor connected directly to the second audio input terminal and also connected to the first audio input terminal by a switching operation; And an output unit configured to output audio signals connected to the L channel audio processor and the R channel audio processor, respectively.

The first and second audio input terminals are interlocked with each other by a plug inserted externally, so that the switches are turned on.

1 is a circuit diagram showing a conventional audio output device.

2 is a circuit diagram illustrating a conventional mono / stereo switchable audio output device.

3 is a circuit diagram showing a voice output device according to the present invention.

* Description of the symbols for the main parts of the drawings *

100: First audio input terminal. 110: second audio input terminal.

120: L channel audio processing unit. 130: R channel audio processing unit.

140: output unit.

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

FIG. 3 is a circuit diagram showing a mono / stereo auto-switched stereo audio output device according to the present invention, and includes a switching coupling type first audio input terminal connected to a first switch SW1 which is turned off by inserting an L plug. 100, a switching coupled second audio input terminal 102 connected to the second switch SW2 turned off by inserting an R plug, and directly connected to the first audio input terminal 100, wherein the first switch The L-channel audio processor 104 connected to the second audio input terminal 102 and the second audio input terminal 102 directly by the switching operation of SW1, and the second switch SW2. The L-channel audio processor 106 connected to the first audio input terminal 100 and the audio signals transmitted from the L-channel audio processor 104 and the R-channel audio processor 106, respectively, are connected to the first audio input terminal 100 by a switching operation of the L speaker. And R speakers It is composed of an output unit 108 that outputs through.

According to the present invention having the configuration as described above, when the L plug is inserted only in the first audio input terminal 100, the first switch SW1 is turned off and the second switch SW2 is turned on.

The audio signal inputted to the first audio input terminal 100 by the turned-off first switch SW1 is transmitted to the L-channel audio processing unit 104, and is turned on by the turned-on second switch SW2. The audio signal input to the first audio input terminal 100 is simultaneously transmitted to the R channel audio processing unit 106.

The audio signals transmitted to the L and R channel audio processing units 104 and 106 are signal processed, respectively, and stereo sound is output through the L and R speakers of the output unit 108.

In addition, when the R plug is inserted into the second audio input terminal 102 only, the first switch SW1 is turned on and the second switch SW2 is turned off.

The audio signal input to the second audio input terminal 102 by the turned-on first switch SW1 is transmitted to the L-channel audio processor 104, and is turned on by the turned-off second switch SW2. The audio signal input to the two audio input terminals 102 is simultaneously transmitted to the R channel audio processor 106.

The audio signals transmitted to the L and R channel audio processing units 104 and 106 are signal processed, respectively, and stereo sound is output through the L and R speakers of the output unit 108.

In addition, when a plug is inserted into the first and second audio input terminals 100 and 102, respectively, the first switch SW1 and the second switch SW2 are both turned off to be connected to the first and second audio input terminals 100 and 102. The input audio signal is transmitted to the L channel audio processor 104 and the R channel audio processor 106, respectively.

The audio signals signaled through the R and L channel audio processing units 104 and 106 are input to the L and R speakers of the output unit 108 to output stereo sound.

Therefore, the present invention obtains mono audio output by connecting only one of the audio connection terminals. In the conventional audio output device, if the L and R plugs to be inserted into the audio input terminal are incorrectly positioned, no sound is output from both speakers. No output

However, according to the present invention, even if the position of the L and R plugs is incorrectly inserted into the first and second audio input terminals 100 and 102, the user can separate a mono / stereo audio operation because high quality audio is output from the output unit 108. You can automatically hear good quality audio output without selecting a mode.

When the audio source having a mono output is connected to a stereo audio output device, the sound is output through both speakers regardless of the L and R positions of the audio connection terminals. have.

Claims (2)

Switch-coupled first and second audio input terminals interlocked with plug insertions to perform a switching operation; An L-channel audio processor connected directly to the first audio input terminal and connected to the second audio input terminal by a switching operation; An R-channel audio processor connected directly to the second audio input terminal and also connected to the first audio input terminal by a switching operation; And an output unit configured to output audio signals connected to the L channel audio processor and the R channel audio processor, respectively. 2. The mono / stereo auto-switched stereo audio output device according to claim 1, wherein the first and second audio input terminals are interlocked by externally inserted plugs so that the switches are turned on.