CN112399305B - Speaker circuit and mobile terminal - Google Patents

Abstract

The disclosure relates to a loudspeaker circuit and a mobile terminal, and relates to the technical field of terminals. The speaker circuit includes a first output path and a second output path; the first output path includes a first speaker and the second output path includes a second speaker; the positive pole and the negative pole of the first loudspeaker are respectively coupled with the first contact and the second contact on the circuit board; the positive pole and the negative pole of the second loudspeaker are respectively coupled with the third contact and the fourth contact on the circuit board; the polarity of the first contact is opposite to that of the third contact, and the polarity of the second contact is opposite to that of the fourth contact. According to the loudspeaker, the two loudspeakers with opposite assembling polarities are arranged, and the phases of common-mode noise signals emitted by the two loudspeakers are opposite, so that the reduction of the common-mode noise signals is realized, and the common-mode noise signals are reduced to a certain extent.

Description

Speaker circuit and mobile terminal

technical field

The embodiments of the present disclosure relate to the technical field of terminals, and in particular, to a speaker circuit and a mobile terminal.

Background technique

A speaker is a functional device that converts electrical energy into sound energy. When the speaker is in use, in addition to outputting the audio signal to be played, it may also output a noise signal.

In the related art, the noise signal output by the speaker can be reduced in the following manner: because the louder the volume, the more obvious the noise signal output by the speaker, so the noise signal can be reduced by reducing the output volume of the terminal.

However, in the above manner of reducing the noise signal by reducing the output volume of the terminal, the volume of the audio signal to be played is too low, which reduces the audio playback quality.

SUMMARY OF THE INVENTION

Embodiments of the present disclosure provide a speaker circuit and a mobile terminal. The technical solution is as follows:

According to a first aspect of the embodiments of the present disclosure, a speaker circuit is provided, the speaker circuit includes a first output path and a second output path;

the first output path includes a first speaker, and the second output path includes a second speaker;

The positive pole and the negative pole of the first speaker are respectively coupled with the first contact and the second contact on the circuit board; the positive pole and the negative pole of the second speaker are respectively connected with the third contact and the fourth contact on the circuit board coupling;

Wherein, the polarities of the first contact and the third contact are opposite, and the polarities of the second contact and the fourth contact are opposite.

Optionally, the phases of the first common mode noise signal shown by the first speaker and the second common mode noise signal output by the second speaker are opposite.

Optionally, the first output path further includes a first audio decoder, and the second output path further includes a second audio decoder;

The output end of the first audio decoder is coupled with the input end of the first speaker;

The output end of the second audio decoder is coupled with the input end of the second speaker;

The first audio decoder is configured to send an audio decoding signal to the first speaker, and the second audio decoder is configured to send an inverted signal of the audio decoding signal to the second speaker;

The first speaker is used for outputting the audio decoding signal, and the second speaker is used for inverting the inverted signal of the audio decoding signal, and outputting the audio decoding signal.

Optionally, the first output path further includes a first power amplifier, and the second output path further includes a second power amplifier;

The output end of the first audio decoder is coupled with the input end of the first power amplifier, and the output end of the first power amplifier is coupled with the input end of the first speaker;

The output end of the second audio decoder is coupled with the input end of the second power amplifier, and the output end of the second power amplifier is coupled with the input end of the second speaker;

The first power amplifier is used for power amplifying the audio decoding signal with a first amplification factor to obtain an amplified audio decoding signal, and sending the amplified audio decoding signal to the first speaker;

The second power amplifier is used for power amplifying the inversion signal with a second amplification factor to obtain an amplified inversion signal, and sending the amplified inversion signal to the second speaker;

Wherein, the amplified audio decoding signal and the amplified inverted signal have the same amplitude.

Optionally, the first output channel and the second output channel are arranged symmetrically.

According to a second aspect of the embodiments of the present disclosure, there is provided a mobile terminal including the speaker circuit of the first aspect.

Optionally, the mobile terminal further includes a processor;

the processor is used for acquiring audio data; performing first processing and second processing on the audio data respectively to obtain an audio signal and an inversion signal of the audio signal; outputting the audio signal through the first output The channel is processed and output by the first speaker, and the inversion signal of the audio signal is processed by the second output channel and then output by the second speaker.

Optionally, the first processing includes positive 90° phase processing, and the second processing includes negative 90° phase processing.

Optionally, the mobile terminal is provided with a first speaker port and a second speaker port;

the first speaker is docked with the first speaker port, and the second speaker is docked with the second speaker port;

The first speaker port and the second speaker port are arranged symmetrically, and the axis of symmetry of the first speaker port and the second speaker port passes through the geometric center of the mobile terminal.

Optionally, the first speaker port is arranged at a first position of the middle frame of the mobile terminal, and the second speaker port is arranged at a second position of the middle frame of the mobile terminal;

or,

The first speaker port is disposed at a third position on the front panel of the mobile terminal, and the second speaker port is disposed at a fourth position on the front panel of the mobile terminal.

The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

By arranging two speakers with opposite polarities, the common mode noise signals emitted by the two speakers have opposite phases, so that the common mode noise signal is reduced, and the common mode noise signal is reduced to a certain extent. Moreover, the embodiment of the present disclosure reduces the common mode noise signal by setting two speakers. Compared with the related art, which needs to reduce the common mode noise signal by reducing the volume of the terminal, the volume of the audio signal will not be reduced, thereby ensuring the audio signal. playback quality.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure.

FIG. 1 is a schematic diagram of a speaker circuit according to an exemplary embodiment;

FIG. 2 is a schematic diagram of a speaker circuit according to another exemplary embodiment;

FIG. 3 is a schematic diagram of a speaker circuit according to another exemplary embodiment;

4 is a schematic diagram of a mobile terminal according to an exemplary embodiment;

Fig. 5 is a schematic diagram of a mobile terminal according to another exemplary embodiment.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as recited in the appended claims.

FIG. 1 is a schematic diagram of a speaker circuit according to an exemplary embodiment. The speaker circuit 100 includes a first output path 110 and a second output path 120 .

The first output path 110 includes a first speaker 111 , and the second output path 120 includes a second speaker 121 . The first output path 110 refers to a closed circuit for outputting audio signals, and the second output path 120 refers to a closed circuit for outputting audio signals.

The first speaker 111 may be referred to as a first speaker, and the second speaker 121 may be referred to as a second speaker. Exemplarily, the first speaker 111 and the second speaker 121 are of the same type, the same size, and the same internal structure. That is, the first speaker 111 and the second speaker 121 are two identical speakers.

The positive and negative electrodes of the first speaker 111 are respectively coupled to the first and second contacts on the circuit board 130 ; the positive and negative electrodes of the second speaker 121 are respectively coupled to the third and fourth contacts on the circuit board 130 . The speaker circuit 100 is disposed on the circuit board 130, the polarities of the first contact and the second contact are opposite, and the polarities of the third contact and the fourth contact are opposite.

In the embodiment of the present disclosure, the assembly polarities of the first speaker 111 and the second speaker 121 are opposite: the polarities of the first contact and the third contact are opposite, and the polarities of the second contact and the fourth contact are opposite. Exemplarily, the first contact and the fourth contact may be the same contact, and the second contact and the third contact may be the same contact. Optionally, the polarities of the first contact and the fourth contact are positive, and the polarities of the second contact and the third contact are negative.

Common-mode noise signals are also known as asymmetric noise signals or line-to-ground noise signals. This noise signal is present at the inputs (power and neutral) of electrical equipment using AC power, and the phase of the common-mode noise signal is kept in phase with respect to ground.

In the embodiment of the present disclosure, by setting the first speaker 111 and the second speaker 121 to have opposite assembly polarities, the first common mode noise signal output by the first speaker 111 and the second common mode noise output by the second speaker 121 are made The phases of the signals are opposite, so the common mode noise signal heard by the end user is smaller than the common mode noise signal output by a single speaker, which reduces the common mode noise signal and reduces the common mode noise signal.

For example, if the amplitude of the first common-mode noise signal is 10, the amplitude of the second common-mode noise signal is 8, and the phases of the two are opposite, the amplitude of the final common-mode noise signal is 2, which is smaller than the common mode shown by a single speaker The amplitude of the noise signal. Exemplarily, when the first speaker 111 and the second speaker 121 are two identical speakers, and the first output path 110 and the second output path 120 are symmetrically arranged, the first common mode noise signal and the second common mode noise signal The amplitude is the same and the phase is opposite, which realizes the complete elimination of the common mode noise signal, that is, the user will not hear the common mode noise signal.

To sum up, in the technical solutions provided by the embodiments of the present disclosure, by arranging two speakers with opposite polarities, the common mode noise signals emitted by the two speakers have opposite phases, so that the common mode noise signal is reduced, and to a certain extent reduces common-mode noise signals. Moreover, the embodiment of the present disclosure reduces the common mode noise signal by setting two speakers. Compared with the related art, which needs to reduce the common mode noise signal by reducing the volume of the terminal, the volume of the audio signal will not be reduced, thereby ensuring the audio signal. playback quality.

In an exemplary embodiment, as shown in FIG. 2 , the first output path 110 further includes a first audio decoder 112 , and the second output path 120 further includes a second audio decoder 122 . The output end of the first audio decoder 112 is coupled with the input end of the first speaker 111 ; the output end of the second audio decoder 122 is coupled with the input end of the second speaker 121 .

An audio decoder is a device that converts digital audio signals to analog audio signals. The first audio decoder 112 and the second audio decoder 122 may be the same device, that is, the first output path 110 and the second output path 120 share the same audio decoder; or, the first audio decoder 112 and the second audio decoder The audio decoder 122 may also be two independent devices, that is, the first output path 110 and the second output path 120 have respective audio decoders. When the first audio decoder 112 and the second audio decoder 122 are the same device, the first audio decoder 112 and the second audio decoder 122 can be integrated in the same audio codec; when the first audio decoder 122 When 112 and the second audio decoder 122 are two independent devices, the first audio decoder 112 may be integrated in the first audio codec, and the second audio decoder 122 may be integrated in the second audio codec.

The first audio decoder 112 is used to send the audio decoding signal to the first speaker 111, the second audio decoder 122 is used to send the inverted signal of the audio decoding signal to the second speaker 121; the first speaker 111 is used to output the audio decoding signal , the second speaker 121 is used for performing inversion processing on the inverted signal of the audio decoding signal, and outputting the audio decoding signal. The audio decoded signal is an analog audio signal, and in the embodiment of the present disclosure, since the first speaker 111 and the second speaker 121 both output the audio decoded signal, the audio decoded signal is enhanced.

Optionally, as shown in FIG. 3 , the first output path 110 further includes a first power amplifier 113 , and the second output path 120 further includes a second power amplifier 123 . The output end of the first audio decoder 112 is coupled with the input end of the first power amplifier 113, the output end of the first power amplifier 113 is coupled with the input end of the first speaker 111; the output end of the second audio decoder 122 is coupled with the input end of the first speaker 111; The input terminal of the power amplifier 123 is coupled, and the output terminal of the second power amplifier 123 is coupled to the input terminal of the second speaker 121 .

The first power amplifier 113 is used for power amplifying the audio decoding signal with the first amplification factor to obtain the amplified audio decoding signal, and sending the amplified audio decoding signal to the first speaker 111; the second power amplifier 123 is used for The second amplification factor amplifies the power of the inverted signal to obtain an amplified inverted signal, and sends the amplified inverted signal to the second speaker 121; wherein, the difference between the amplified audio decoding signal and the amplified inverted signal is The amplitude is the same. By reasonably setting the first amplification factor and the second amplification factor, the amplified audio decoded signal and the amplified inverted signal have the same amplitude, thereby ensuring the playback quality of the audio signal.

Optionally, the above-mentioned first power amplifier 113 may be integrated in the first speaker 111 , and the above-mentioned second power amplifier 123 may be integrated in the second speaker 121 .

Optionally, the first output path 110 and the second output path 120 are arranged symmetrically. For example, the first output path 110 and the second output path 120 are center-symmetric, and the center of symmetry is the geometric center of the mobile terminal; or, the first output path 110 and the second output path 120 are axisymmetric, and the symmetry axis passes through the geometric center of the mobile terminal.

To sum up, in the technical solutions provided by the embodiments of the present disclosure, two speakers with opposite polarities are installed, and the first audio decoder outputs the audio decoding signal, and the second audio decoder outputs the reverse of the audio decoding signal. The phase signal finally makes both speakers output the audio decoding signal, which realizes the enhancement of the audio signal to be played while suppressing the common mode noise signal.

In addition, the first power amplifier power-amplifies the audio decoded signal with the first amplification factor, and the second power amplifier power-amplifies the inverted signal with the second amplification factor, so that the final amplified audio decoded signal and the amplified inverted signal are power-amplified. The amplitude of the signal is the same, and finally the amplitude of the audio signal emitted by the first speaker and the second speaker is the same. Since the amplitude of the audio signal affects the volume emitted by the speaker, it is precisely because the amplitude of the audio signal emitted by the two speakers is the same, so the two speakers The output volume is the same, which will not make one speaker volume loud and the other speaker low, resulting in an obvious sense of difference, thus ensuring the playback quality of the audio signal.

In addition, when the first loudspeaker and the second loudspeaker are two identical loudspeakers, and the first output channel and the second output channel are arranged symmetrically, the lines passed by the first common mode noise signal and the second common mode noise signal are consistent, resulting in The signal interference is consistent, so the amplitude of the first common mode noise signal and the second common mode noise signal are the same; when the first common mode noise signal and the second common mode noise signal pass through two speakers with opposite polarities, the first common mode noise signal and the second common mode noise signal The phase of the first common mode noise signal output by the speaker and the common mode noise signal output by the second speaker are opposite, and finally the common mode noise signal output by the two speakers has the same amplitude and opposite phase, which realizes the complete elimination of the common mode noise signal. That is, the user will not hear the common mode noise signal.

Fig. 4 is a schematic diagram of a mobile terminal according to an exemplary embodiment. The mobile terminal 200 includes the speaker circuit 100 of the above-described embodiment. The mobile terminal 200 may be a mobile phone, a tablet computer, an e-book reading device, a multimedia playing device, a wearable device or other electronic devices.

Optionally, the mobile terminal 200 further includes a processor 210 .

The processor 210 is used to obtain audio data; the audio data is subjected to the first processing and the second processing to obtain the audio signal and the inverted signal of the audio signal; the audio signal is processed by the first output path 110 and then the first speaker 111 output, and the inverted signal of the audio signal is processed by the second output path 120 and then output by the second speaker 121 .

Illustratively, the audio data is a digital signal. The first processing includes positive 90° phase processing, and the second processing includes negative 90° phase processing. By performing positive 90° phase processing and negative 90° phase processing on the audio data, there is no delay between the obtained audio signal and the inverted signal of the audio signal, and the synchronization of the audio signals finally output by the two speakers is improved.

Exemplarily, the mobile terminal 200 is provided with a first speaker port 201 and a second speaker port 202; the first speaker 111 is docked with the first speaker port 201, and the second speaker 121 is docked with the second speaker port 202; the first speaker The port 201 and the second speaker port 202 are symmetrically arranged, and the axis of symmetry of the first speaker port 201 and the second speaker port 202 passes through the geometric center of the mobile terminal 200 . By arranging the two speaker ports symmetrically and connecting the two speakers to the two speaker ports, the amplitudes of the common mode noises emitted by the two speakers can be made equal as much as possible.

In one example, as shown in FIG. 4 , the first speaker port 201 is set at a first position of the middle frame 220 of the mobile terminal 200 , and the second speaker port 202 is set at a second position of the middle frame 220 of the mobile terminal 200 , and the first speaker port 201 and the second speaker port 202 are symmetrical about the horizontal axis of symmetry of the mobile terminal.

In another example, as shown in FIG. 5 , the first speaker port 201 is disposed at the third position of the front panel 230 of the mobile terminal 200 , and the second speaker port 202 is disposed at the fourth position of the front panel 230 of the mobile terminal 200 , and the first speaker port 201 and the second speaker port 202 are symmetrical about the horizontal axis of symmetry of the mobile terminal.

To sum up, in the technical solutions provided by the embodiments of the present disclosure, the audio data and the audio signal are obtained by performing the first processing and the second processing on the audio data, respectively, so as to obtain the audio signal and the inverse signal of the audio signal, so that the audio output from the speaker can be decoded. The signals are in the same phase, enhancing the audio decoded signal to some extent.

In addition, positive 90° phase processing and negative 90° phase processing are performed on the audio data respectively, and there is no delay between the obtained audio signal and the inverted signal of the audio signal, which improves the synchronization of the audio signals finally output by the two speakers. .

In addition, the two speaker ports are arranged symmetrically, and the axis of symmetry passes through the geometric center of the mobile terminal, so that the two speakers can produce a stereo effect.

Other embodiments of the present disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or techniques in the technical field not disclosed by the present disclosure . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise structures described above and illustrated in the accompanying drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (8)

1. A speaker circuit, comprising a processor, a first output path, and a second output path;

the first output path comprises a first audio decoder and a first loudspeaker, the second output path comprises a second audio decoder and a second loudspeaker, and the first loudspeaker and the second loudspeaker are two same loudspeakers;

the first audio decoder is used for performing first processing on audio data to obtain an audio decoding signal and sending the audio decoding signal to the first loudspeaker; the second audio decoder is configured to perform second processing on the audio data to obtain an inverse signal of the audio decoding signal, and send the inverse signal of the audio decoding signal to the second speaker;

the positive pole and the negative pole of the first loudspeaker are respectively coupled with the first contact and the second contact on the circuit board, and the first loudspeaker is used for outputting the audio decoding signal; the positive pole and the negative pole of the second loudspeaker are respectively coupled with the third connecting point and the fourth connecting point on the circuit board, and the second loudspeaker is used for carrying out reverse phase processing on a reverse phase signal of the audio decoding signal and outputting the audio decoding signal; wherein the first contact and the third contact have opposite polarities, and the second contact and the fourth contact have opposite polarities; a first common mode noise signal output by the first speaker and a second common mode noise signal output by the second speaker are opposite in phase;

an output of the first audio decoder is coupled to an input of the first speaker; an output of the second audio decoder is coupled to an input of the second speaker.

2. The speaker circuit of claim 1, wherein the first output path further comprises a first power amplifier, the second output path further comprises a second power amplifier;

an output of the first audio decoder is coupled to an input of the first power amplifier, and an output of the first power amplifier is coupled to an input of the first speaker;

an output of the second audio decoder is coupled to an input of the second power amplifier, and an output of the second power amplifier is coupled to an input of the second speaker;

the first power amplifier is used for performing power amplification on the audio decoding signal by using a first amplification factor to obtain an amplified audio decoding signal, and sending the amplified audio decoding signal to the first loudspeaker;

the second power amplifier is used for performing power amplification on the inverted signal by using a second amplification coefficient to obtain an amplified inverted signal, and sending the amplified inverted signal to the second loudspeaker;

wherein the amplified audio decoded signal and the amplified inverse signal have the same amplitude.

3. The speaker circuit of claim 1 or 2, wherein the first output path is disposed symmetrically to the second output path.

4. A mobile terminal, characterized in that the mobile terminal comprises a speaker circuit according to any of claims 1 to 3.

5. The mobile terminal of claim 4, wherein the mobile terminal further comprises a processor;

the processor is used for acquiring audio data; respectively carrying out first processing and second processing on the audio data to obtain an audio signal and an inverted signal of the audio signal; and the audio signal is output by the first loudspeaker after being processed by the first output path, and the inverted signal of the audio signal is output by the second loudspeaker after being processed by the second output path.

6. The mobile terminal of claim 5, wherein the first processing comprises positive 90 ° phase processing and the second processing comprises negative 90 ° phase processing.

7. The mobile terminal of claim 6, wherein the mobile terminal has a first speaker port and a second speaker port disposed thereon;

the first speaker is docked with the first speaker port and the second speaker is docked with the second speaker port;

the first speaker port and the second speaker port are symmetrically arranged, and a symmetry axis of the first speaker port and the second speaker port passes through a geometric center of the mobile terminal.

8. The mobile terminal of claim 7,

the first speaker port is arranged at a first position of a middle frame of the mobile terminal, and the second speaker port is arranged at a second position of the middle frame of the mobile terminal;

or,

the first speaker port is disposed at a third position of the front panel of the mobile terminal, and the second speaker port is disposed at a fourth position of the front panel of the mobile terminal.

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