JP2002281586A - Acoustic reproduction device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an acoustic reproduction device to which a speaker can be connected without confirming the polarity of a speaker terminal and the polarity of a code connected to the speaker. SOLUTION: The acoustic reproduction device for connecting the speaker terminal 9 provided on the main body of the acoustic reproduction device with the speaker through the code is provided with a microphone for converting sound emitted from the speaker to an electric signal, a phase detection circuit for detecting the phase of the output signal of the microphone, a phase switching circuit 8 for switching the phase of a signal to be outputted to the speaker terminal and a control part 6 to which a signal from the phase detection circuit is inputted for controlling the phase switching circuit. When the speaker is connected to a reversed pole, the circuit 8 switches the phase of the signal to be outputted to the speaker terminal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound reproducing apparatus, and more particularly, to a sound reproducing apparatus in which a speaker terminal provided on a main body of the sound reproducing apparatus and a speaker are connected by a cord, without having to worry about the polarity of the speaker connection. The present invention relates to a sound reproducing device.

[0002]

2. Description of the Related Art Conventionally, in an audio reproducing apparatus, when an amplifier and a speaker are connected to each other via a speaker terminal and a cord, the polarity of the speaker terminal and the polarity of the cord connected to the speaker have to be confirmed before connection.

[0003]

In the above-described conventional sound reproducing apparatus, when connecting an amplifier and a speaker or when replacing a speaker or a cord, the polarity of the speaker terminal or the polarity of the cord connected to the speaker must be confirmed. Connection work and change work were troublesome.

[0004] The present invention has been made in view of the above points, and an object of the present invention is to provide a sound reproducing apparatus capable of connecting a speaker without confirming the polarity of a speaker terminal and the polarity of a cord connected to the speaker. It is to provide a device.

[0005]

A sound reproducing apparatus according to the present invention is a sound reproducing apparatus for connecting a speaker terminal provided on a main body of the sound reproducing apparatus and a speaker by a cord, wherein sound radiated from the speaker is converted into an electric signal. A microphone for conversion, a phase detection circuit for detecting a phase of an output signal of the microphone, and a control unit for receiving a signal from the phase detection circuit and outputting a display signal to a display unit, wherein the speaker is connected to the opposite pole The display unit displays on the display unit that the speaker is connected to the opposite polarity.

A sound reproducing apparatus according to the present invention is a sound reproducing apparatus for connecting a speaker terminal provided on a main body of the sound reproducing apparatus and a speaker by a cord, wherein a microphone for converting sound radiated from the speaker to an electric signal is provided. ,
A phase detection circuit that detects a phase of an output signal of the microphone, a phase switching circuit that switches a phase of a signal output to the speaker terminal, and a control unit that receives the signal from the phase detection circuit and controls the phase switching circuit And the phase switching circuit switches the phase of the signal output to the speaker terminal when the speaker is connected to the opposite polarity.

Further, the sound reproducing apparatus includes a plurality of speaker terminals and speakers connected to the respective terminals, and the phase of each speaker is sequentially switched.

In each of the sound reproducing devices, the phase detection circuit is provided in a remote controller for controlling the main body of the sound reproducing device.

In the above-mentioned sound reproducing apparatus, the display unit provided in the remote controller is configured to display whether the phase of the radiated sound of the speaker currently being detected is positive or negative. is there.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sound reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a remote controller of a sound reproducing apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a main part of the main body of the sound reproducing apparatus.

A remote controller 1 shown in FIG. 1 includes a key 2 and a display unit 3, and a microphone 4 is connected. The remote controller 1 receives an infrared light emitting unit (not shown), a signal phase detection circuit from the microphone 4, and signals from the key 2 and the infrared light receiving unit, and sends control signals to the infrared light emitting unit and the display unit 3. It has a control circuit.

An infrared signal transmitted from the remote controller 1 is received by the light receiving section 5 and the control section 6 of the main body shown in FIG. 2 performs a control operation in accordance with a command obtained by decoding the signal. That is, the control unit 6 outputs a control signal to the DSP 7 and the phase switching circuit 8 to control the volume, polarity, and the like of the speaker connected to the speaker terminal 9.

Although one DSP 7, one phase switching circuit 8 and one speaker terminal 9 are shown, the number of speakers is actually equal to the number of speakers. An amplifier for outputting an audio signal to the DSP 7 is not shown. The control unit 6 sends out a light emission signal to an infrared light emitting unit (not shown).

Next, the polarity switching operation for connecting the speaker to the positive electrode will be described with reference to FIGS.
The remote controller 1 waits for a phase detection start command by a key operation in step S1, sets the number N of speakers, and proceeds to step S2.

In step S2, N is decremented, and a command for detecting the phase of the Nth speaker is transmitted to the main body side light receiving section 5. In step S6, it is determined whether or not the speaker selection has been completed. If the process has been completed (N = 0), the process proceeds to step S21, and if not completed, the process proceeds to step S7 to transmit a command for detecting the phase of the Nth speaker to the main body side light receiving unit 5. Then, in step S10, the process waits until the reference signal is received by the microphone.

When the main body side control unit 6 receives the phase detection command in step S3, the process shifts to step S4 to determine whether or not the volume value has been changed to a level for phase detection. The process proceeds to step S5 if not changed. In step S5, the volume value is changed to a level for phase detection, and the process proceeds to step S8.

In step S8, the command of the selected speaker is received, and the process proceeds to step S9. Step S
Reference numeral 9 outputs a reference signal to the speaker that has received the command, and proceeds to step S14.

The control unit of the remote controller determines whether or not the reference signal has been received by the microphone in step S10 within a predetermined time. If the reference signal has been received, the process proceeds to step S11, and if not received, the process proceeds to step S20. .

In step S11, it is determined whether the received reference signal is in the normal phase or in the opposite phase. If the received reference signal is in the normal phase, the process proceeds to step S18.
Move to 2. In step S18, it is displayed on the display unit 3 that the Nth speaker is connected in the normal phase.
At step S19, the end of the phase detection is displayed, N is decremented, and the routine goes to step S6.

In step S12, it is displayed on the display unit 3 that the N-th speaker is connected in reverse phase. Further, in step S13, a phase switching command is transmitted to the main body side light receiving unit 5, and in step S17, the command is transmitted. Wait for reception.

When the controller 6 on the main body side receives the phase switching command in step S14, it switches the phase in step S15, and transmits a phase switching end command to the remote controller in step S16. When the controller on the remote controller side receives the phase switching end command in step S17, the process proceeds to step S2, and the routine after step S2 is repeated.

In step S20, the control section of the remote controller displays that the Nth speaker is not connected, decrements N, and proceeds to step S6.

In step S21, the control unit on the remote controller sends a phase end command to the main unit, and ends the operation of the control unit on the remote controller. When the control unit 6 on the main unit side receives the phase end command in step S22, the volume value is returned to the original value in step S23, and the operation of the control unit 6 on the main unit side ends. By the above operation, it is displayed that all the connected speakers are connected in the normal phase, and that the unconnected speakers are not connected.

[0024]

According to the sound reproducing apparatus of the present invention, when setting up the apparatus, the connection can be made without concern for the polarity of the speaker.

When the speaker is connected to the opposite polarity, the message is displayed, so that the user can recognize that the speaker is connected to the opposite polarity.

Further, even when a part of the system such as the speaker is changed, the connection can be made without worrying about the polarity of the speaker.

[Brief description of the drawings]

FIG. 1 is a front view showing a remote controller of an audio reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a main part of the sound reproducing device.

FIG. 3 is a flowchart showing an operation of the sound reproducing device.

FIG. 4 is a flowchart showing an operation of the sound reproducing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Remote controller 2 Key 3 Display part 4 Microphone 5 Light receiving part 6 Control part 7 DSP 8 Phase switching circuit 9 Speaker terminal

Claims (5)

[Claims] 1. A sound reproducing apparatus for connecting a speaker terminal provided in a sound reproducing apparatus main body and a speaker by a cord, wherein a microphone for converting sound radiated from the speaker into an electric signal, and a phase of an output signal of the microphone. And a control unit that receives a signal from the phase detection circuit and outputs a display signal to a display unit, and when the speaker is connected to the opposite pole, the speaker is inverted to the display unit. An audio playback device configured to display that it is connected to a pole. 2. A sound reproducing apparatus for connecting a speaker terminal provided on a main body of a sound reproducing apparatus and a speaker by a cord, wherein a microphone for converting sound radiated from the speaker into an electric signal, and a phase of an output signal of the microphone. A phase detection circuit for detecting the phase difference, a phase switching circuit for switching the phase of a signal output to the speaker terminal, and a control unit for receiving a signal from the phase detection circuit and controlling the phase switching circuit, wherein the speaker An audio reproducing apparatus configured to switch the phase of a signal output to a speaker terminal by the phase switching circuit when connected to a pole. 3. The sound reproducing apparatus according to claim 2, further comprising a plurality of speaker terminals and speakers connected to the respective terminals, wherein the phase of each speaker is sequentially switched. 4. The sound reproducing device according to claim 1, wherein the phase detection circuit is provided in a remote controller for controlling a sound reproducing device main body. 5. The display unit provided in the remote controller is configured to display whether the phase of the radiated sound of the speaker currently being detected is positive or negative.
Sound reproduction device.