CN115942195A - Terminal device and speaker driving method - Google Patents

Abstract

The present disclosure provides a terminal device and a speaker driving method, the terminal device including: main chip and at least one audio output circuit, this audio output circuit includes: the intelligent power amplifier comprises an intelligent power amplifier chip, a first loudspeaker and a second loudspeaker, wherein the first loudspeaker and the second loudspeaker are connected in parallel and are connected with the same audio output interface of the intelligent power amplifier chip. The master chip is configured to: the method comprises the steps of obtaining a first current signal of a first loudspeaker and a second current signal of a second loudspeaker, selecting a target loudspeaker from the first loudspeaker and the second loudspeaker by comparing the first current signal with the second current signal, obtaining algorithm parameters corresponding to the target loudspeaker from a preset parameter information base, and sending the algorithm parameters corresponding to the target loudspeaker to an intelligent power amplifier chip, so that the intelligent power amplifier chip drives the first loudspeaker and the second loudspeaker based on the algorithm parameters corresponding to the target loudspeaker.

Description

Terminal device and speaker driving method

Technical Field

The embodiment of the disclosure relates to the technical field of electronics, in particular to a terminal device and a loudspeaker driving method.

Background

With the development of electronic technology, users have higher and higher requirements on sound effect configuration of terminal equipment. In order to obtain better sound effect, a plurality of speakers are required to be arranged in the terminal equipment. However, each speaker needs to be matched with one smart power amplifier chip for driving, for example, 4 speakers need to be matched with 4 smart power amplifiers, and 8 speakers need to be matched with 8 smart power amplifiers. However, with the increase of the number of speakers, the limited battery output capability of the terminal device has been difficult to satisfy the current requirement of the smart power amplifier chip.

Disclosure of Invention

The embodiment of the disclosure provides a terminal device and a loudspeaker driving method.

In a first aspect, an embodiment of the present disclosure provides a terminal device, including: the main chip and at least one audio output circuit, audio output circuit includes: the audio output circuit is characterized by comprising an intelligent power amplifier chip, a first loudspeaker and a second loudspeaker, wherein the first loudspeaker and the second loudspeaker are connected to an audio output interface of the intelligent power amplifier chip in parallel;

the main chip is connected with the intelligent power amplifier chip and is configured as follows: the method comprises the steps of obtaining a first current signal of a first loudspeaker and a second current signal of a second loudspeaker, selecting a target loudspeaker from the first loudspeaker and the second loudspeaker by comparing the first current signal with the second current signal, obtaining an algorithm parameter corresponding to the target loudspeaker from a preset parameter information base, and sending the algorithm parameter corresponding to the target loudspeaker to an intelligent power amplification chip, so that the intelligent power amplification chip drives the first loudspeaker and the second loudspeaker based on the algorithm parameter corresponding to the target loudspeaker, wherein the algorithm parameter corresponding to the first loudspeaker and the algorithm parameter corresponding to the second loudspeaker in the audio output circuit are stored in the parameter information base.

Further, the master chip is configured to: if the current value corresponding to the first current signal is larger than or equal to the current value corresponding to the second current signal, determining the first loudspeaker as the target loudspeaker; and if the current value corresponding to the first current signal is smaller than the current value corresponding to the second current signal, determining the second loudspeaker as the target loudspeaker.

Further, the smart power amplifier chip is configured to: respectively collecting a first current signal of the first loudspeaker and a second current signal of the second loudspeaker, and transmitting the collected first current signal and the collected second current signal to the main chip.

Furthermore, a first detection sub-circuit and a second detection sub-circuit are arranged in the smart power amplifier chip, the first detection sub-circuit is connected with the first loudspeaker and configured to collect a first current signal of the first loudspeaker, and the second detection sub-circuit is connected with the second loudspeaker and configured to collect a second current signal of the second loudspeaker.

Further, the smart power amplifier chip includes: the loudspeaker comprises a first pin, a second pin, a third pin and a fourth pin, wherein the anode of the first loudspeaker is connected with the first pin and the third pin respectively, the anode of the second loudspeaker is connected with the first pin and the fourth pin respectively, and the cathode of the first loudspeaker and the cathode of the second loudspeaker are connected with the second pin;

the third pin is connected with the input end of the first detection sub-circuit, and the fourth pin is connected with the input end of the second detection sub-circuit.

Furthermore, in the same audio output circuit, the first speaker and the second speaker have the same model, and the cavity structures are the same or symmetrical.

Furthermore, the audio output circuit is provided with a plurality of audio output circuits, the audio output circuits are divided into a first audio output circuit and a second audio output circuit, a first loudspeaker and a second loudspeaker in the first audio output circuit are high-frequency loudspeakers, and a first loudspeaker and a second loudspeaker in the second audio output circuit are full-frequency loudspeakers or low-frequency loudspeakers.

Further, the number of the audio output circuits is four, and the audio output circuits include two first audio output circuits and two second audio output circuits.

Further, the first speaker and the second speaker in one of the first audio output circuits, and the first speaker and the second speaker in one of the second audio output circuits are disposed on a first side of the terminal device, the first speaker and the second speaker in the other of the first audio output circuits, and the first speaker and the second speaker in the other of the second audio output circuits are disposed on a second side of the terminal device, the second side being a side opposite to the first side.

Further, the first speaker and the second speaker in each of the first audio output circuit and the second audio output circuit are disposed in axial symmetry with respect to the same axis.

In a second aspect, an embodiment of the present disclosure provides a speaker driving method, which is applied to a terminal device, where the terminal device includes: at least one audio output circuit, the audio output circuit comprising: the audio output circuit comprises an intelligent power amplifier chip, a first loudspeaker and a second loudspeaker, wherein the first loudspeaker and the second loudspeaker are connected to an audio output interface of the intelligent power amplifier chip in parallel, and the method comprises the following steps:

acquiring a first current signal of the first loudspeaker and a second current signal of the second loudspeaker;

selecting a target speaker from the first speaker and the second speaker by comparing the first current signal and the second current signal;

acquiring algorithm parameters corresponding to the target loudspeaker from a preset parameter information base, wherein the algorithm parameters corresponding to the first loudspeaker and the algorithm parameters corresponding to the second loudspeaker are stored in the parameter information base;

and driving the first loudspeaker and the second loudspeaker based on the algorithm parameters corresponding to the target loudspeaker.

Further, selecting a target speaker from the first speaker and the second speaker by comparing the first current signal and the second current signal comprises:

if the current value corresponding to the first current signal is larger than or equal to the current value corresponding to the second current signal, determining the first loudspeaker as the target loudspeaker;

and if the current value corresponding to the first current signal is smaller than the current value corresponding to the second current signal, determining the second loudspeaker as the target loudspeaker.

The technical scheme provided by the embodiment of the disclosure at least has the following technical effects or advantages:

in the terminal device provided by the embodiment of the disclosure, two speakers are connected in parallel to an audio output interface of an intelligent power amplifier chip, current signals of the two speakers are respectively obtained, the current magnitude is compared, one of the two speakers is selected as a target speaker, an algorithm parameter corresponding to the target speaker is obtained from a preset parameter information base, and the algorithm parameter corresponding to the target speaker is sent to the intelligent power amplifier chip, so that the intelligent power amplifier chip drives the two connected speakers based on the algorithm parameter corresponding to the target speaker, thereby effectively realizing that one intelligent power amplifier chip drives the two speakers connected in parallel, reducing the number of the intelligent power amplifier chips needing to be configured in a multi-speaker scene, and effectively reducing the audio development cost of the multi-speaker terminal and the requirement on the power supply capability of the terminal.

The foregoing is a summary of the embodiments of the present disclosure, and the following is a detailed description of the embodiments of the present disclosure in order to provide a clear understanding of the technical solutions of the embodiments of the present disclosure.

Drawings

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the embodiments of the disclosure. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram three of a terminal device provided by an embodiment of the present disclosure

Fig. 4 is a schematic diagram of an exemplary speaker arrangement provided by an embodiment of the present disclosure;

fig. 5 is a flowchart of a speaker driving method according to an embodiment of the present disclosure.

Detailed Description

The combination of an intelligent Power Amplifier chip (Smart PA) and a loudspeaker can effectively improve a series of performances such as loudness and tone quality of the external audio of the terminal equipment. The characteristic change of the loudspeaker is related to the frequency/impedance curve, and the intelligent power amplifier chip can measure the voltage and the current output by the intelligent power amplifier chip in real time so as to calculate the frequency/impedance curve of the loudspeaker. The intelligent power amplifier chip, such as 88270 digital power amplifier, can calculate the current amplitude and conditions such as temperature of speaker according to preset algorithm parameter and drive algorithm (have IV temperature protection and amplitude protection), through the calculation to the input signal, can also predict the amplitude of speaker to effectively adjust the audio performance of speaker, for example increase the volume, improve tone quality and temperature control etc..

The adjustment of the intelligent power amplifier chip to the loudspeaker, including the IV temperature protection and the amplitude protection, depends on the preconfigured algorithm parameters, and in order to enable the intelligent power amplifier chip to more accurately control the real-time output of the loudspeaker so as to achieve the best effect, the algorithm parameters to be preconfigured in the corresponding intelligent power amplifier chip can be determined only by repeatedly debugging the performance parameters of the loudspeaker to be driven in advance. The intelligent power amplifier chip drives the corresponding loudspeaker by using the algorithm parameters, so that the loudspeaker can exert the maximum sound effect performance.

The performance parameters of different speakers are different to a greater or lesser extent, and even if the speakers are provided by the same supplier and of the same model, the impedance may be slightly different due to the winding accuracy during manufacturing of the speakers. Therefore, the algorithm parameters corresponding to different speakers are different, and the algorithm parameters configured in the intelligent power amplifier chip are only matched with one speaker, so that the intelligent power amplifier chip cannot take effect on other speakers.

Therefore, one intelligent power amplifier chip can only drive one loudspeaker, I/V feedback is added into a frequency spectrum signal output interface, the loudspeaker matched with the frequency spectrum signal output interface is used as a modeling protection object, the loudspeaker is detected in real time, temperature protection and amplitude protection are carried out on the loudspeaker, and the sound effect performance of the loudspeaker is exerted to the maximum extent.

However, as the requirement of the user for the sound effect configuration of the terminal equipment increases, the number of the speakers configured in the terminal equipment increases, for example, from 2 to 4, and further to 8. The output capacity of the battery of the terminal equipment is limited, and the current requirement of the intelligent power amplifier chip is difficult to meet.

Taking a mobile terminal as an example, the battery output capacity of the mobile terminal is generally regulated normally at 10A/2m, and the current (peak) peak value of each intelligent power amplifier chip is output according to 2.5A, so that 10A output capacity is required for 4 intelligent power amplifier chips, and more than 4 intelligent power amplifier chips need to be properly limited in current, so as to meet the requirement that the whole system does not crash and ensure the normal operation of the system.

Therefore, the technical scheme is provided in the embodiment of the disclosure, one intelligent power amplifier chip can drive two loudspeakers, the protection algorithm in the intelligent power amplifier chip can be guaranteed to take effect such as temperature protection and amplitude protection, and the function of intelligent power amplifier is realized, so that the number of the intelligent power amplifier chips needing to be configured in a multi-loudspeaker scene is reduced, and the audio development cost of a multi-loudspeaker terminal and the requirement on the power supply capacity of the terminal are reduced.

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

As shown in fig. 1, a terminal device 10 provided in the embodiment of the present disclosure includes: a main chip 100 and at least one audio output circuit 110. The audio output circuit 110 includes: the intelligent power amplifier comprises an intelligent power amplifier chip 111, a first loudspeaker 112 and a second loudspeaker 113. It should be noted that only one audio output circuit 110 is shown in fig. 1 as an example, and the number of audio output circuits 110 included in the terminal device 10 is not limited, and the specific number is determined according to the number of speakers required by the terminal device 10.

In the embodiment of the present disclosure, the audio output circuit 110 refers to a circuit including at least two speakers. For example, the audio output circuit 110 may include a dual speaker circuit, i.e., two speakers are driven by a smart power amplifier chip 111. Or, in other examples, the audio output circuit 110 may also include more than two speakers, that is, three or more than three speakers connected in parallel are driven by one smart power amplifier chip 111, which is not limited in this embodiment. The disclosed embodiment mainly takes the audio output circuit 110 as a dual speaker circuit as an example for explanation.

It should be noted that in some examples, the terminal device 10 may include a single speaker circuit in addition to the audio output circuit 110 described above. The single speaker circuit refers to a circuit in which a power amplifier chip drives a speaker, and algorithm parameters of the speaker are configured in the power amplifier chip in a targeted manner in advance, for example, 88270 digital power amplifier may be adopted. The specific circuit structure and driving principle of the single speaker circuit can be found in the related art, and will not be described in detail here.

For example, when the terminal device 10 needs to set an even number (greater than zero) of speakers, the terminal device may employ only the audio output circuit 110 described above; when the terminal device 10 needs to be provided with an odd number (greater than 1) of speakers, the terminal device may include both the above-described audio output circuit 110 and a single speaker circuit (not shown in fig. 1).

For example, when the audio output circuit 110 is a dual speaker circuit, and the terminal device 10 needs sound effects of two speakers, one audio output circuit 110 may be provided; if three speakers are required, an audio output circuit 110 and a single speaker circuit may be provided; if four speakers are required, two audio output circuits 110 may be provided; if five speakers are required, two audio output circuits 110 and a single speaker circuit may be provided; if 8 speakers are required, four audio output circuits 110 may be provided, which is not limited in this embodiment.

In the audio output circuit 110, the first speaker 112 and the second speaker 113 are connected in parallel to the same audio output interface of the smart power amplifier chip 111. For example, the smart power amplifier chip 111 includes: a first lead a and a second lead b. The first pin a and the second pin b are an audio output interface of the smart power amplifier chip 111. The first speaker 112 and the second speaker 113 are connected in parallel between the first pin a and the second pin b, i.e. the positive pole of the first speaker 112 and the positive pole of the second speaker 113 are connected to the first pin a, and the negative pole of the second speaker 113 are connected to the second pin b.

Considering that the first speaker 112 and the second speaker 113 in the same audio output circuit 110 are driven by the same smart power amplifier chip 111, in some examples, the models of the first speaker 112 and the second speaker 113 are the same, and the cavity structures (including shapes and sizes) of the sound cavities are the same or symmetrical. Therefore, the impedance difference of the two loudspeakers is small, and is usually the difference caused by the winding precision, so that the two loudspeakers exert the maximized sound effect performance as much as possible. It should be noted that although the difference between the impedances is small, the difference between the impedances still causes the difference of the algorithm parameters, and if the algorithm parameters of the speaker with the larger impedance are used, the speaker with the smaller impedance may be damaged due to the over-power. Therefore, in order to enable the algorithm parameters adopted by the smart power amplifier chip 111 to be effective for both speakers, appropriate algorithm parameters need to be selected. Furthermore, the specific model and size of the speaker are not limited by the embodiments of the present disclosure, for example, an 8 ohm micro speaker with 16 × 20 × 2.3mm or 12 × 17 × 2.05mm may be used.

The main chip 100 is connected with the intelligent power amplifier chip 111, and is configured as follows: for the audio output circuit 110, a first current signal of the first speaker 112 and a second current signal of the second speaker 113 are obtained, a target speaker is selected from the first speaker 112 and the second speaker 113 by comparing the first current signal with the second current signal, an algorithm parameter corresponding to the target speaker is obtained from a preset parameter information base, and the algorithm parameter corresponding to the target speaker is sent to the intelligent power amplifier chip 111, so that the intelligent power amplifier chip 111 drives the first speaker 112 and the second speaker 113 based on the algorithm parameter corresponding to the target speaker. The parameter information base stores algorithm parameters corresponding to the first speaker 112 and the second speaker 113 in the audio output circuit 110. For example, the main chip 100 may be an Application Processor (AP).

In some examples, a first current signal of the first speaker 112 and a second current signal of the second speaker 113 may be respectively collected by the smart power amplifier chip 111, and the collected first current signal and second current signal may be transmitted to the main chip 100. It should be noted that, in the related art, the intelligent power amplifier chip only adds I/V feedback to the audio output interface, and thus the acquired current is the total current of the two speakers connected in parallel, and the respective current acquisition of the two speakers cannot be realized, that is, the acquired impedance is not the true impedance of the speakers, which may cause the temperature protection and amplitude protection to fail, and cannot realize the function of the intelligent power amplifier. The embodiment of the present disclosure can obtain the real impedance of the two speakers by respectively collecting the respective currents of the first speaker 112 and the second speaker 113, and further determine the selected algorithm parameter by comparing the magnitudes of the two currents, i.e., the magnitudes of the impedances, so as to ensure that the temperature protection and the amplitude protection of the smart power amplifier chip 111 can also take effect under the condition of driving the two speakers connected in parallel, thereby implementing the function of the smart power amplifier.

For example, a first detection sub-circuit and a second detection sub-circuit are disposed in the smart power amplifier chip 111. The first detection sub-circuit is connected with the first loudspeaker 112 and configured to collect a first current signal of the first loudspeaker 112 and transmit the first current signal, and the second detection sub-circuit is connected with the second loudspeaker 113 and configured to collect a second current signal of the second loudspeaker 113 and realize current feedback of two parallel loudspeaker branches. It should be noted that, the specific circuit structures of the first and second detection sub-circuits may refer to the related current detection circuit structure, for example, a resistor with a smaller resistance value may be connected in series, and the current passing through the corresponding speaker may be obtained by detecting the voltage drop across the resistor.

For example, the smart power amplifier chip 111 further includes a third pin c and a fourth pin d. The positive electrode of the first speaker 112 is connected to the third pin c in addition to the first pin a. The positive electrode of the second speaker 113 is connected to the fourth pin d in addition to the first pin a. The third pin c is connected with the input terminal of the first detection sub-circuit, and the fourth pin d is connected with the input terminal of the second detection sub-circuit, so that the working current of the first speaker 112 and the working current of the second speaker 113 are fed back to the smart power amplifier chip 111 through the third pin c and the fourth pin d, respectively.

In specific implementation, for each audio output circuit 110, the performance parameters of the first speaker 112 and the second speaker 113 are extracted in advance, and the first speaker 112 is used as a modeling protection object to perform debugging, so as to obtain the algorithm parameter corresponding to the first speaker 112, and the second speaker 113 is used as a modeling protection object to perform debugging, so as to obtain the algorithm parameter corresponding to the second speaker 113. Thereafter, the algorithm parameters corresponding to the first speaker 112 and the algorithm parameters corresponding to the second speaker 113 of each audio output circuit 110 are stored in correspondence in the terminal device 10, and a parameter information base is obtained. For example, the terminal device 10 further includes a memory, and the algorithm parameters may be correspondingly stored in the memory to obtain a parameter information base.

One or more of the above-mentioned audio output circuits 110 may be provided in the terminal device 10, and are configured according to the requirements of actual products. For example, in an application scenario, if the terminal device 10 adopts a two-speaker scheme, 1 audio output circuit 110 may be configured to implement that 1 smart power amplifier chip drives 2 speakers, as shown in fig. 1. In another application scenario, if the terminal device 10 adopts a 4-speaker scheme, 2 audio output circuits 110 may be configured, so that 2 smart power amplifier chips drive 4 speakers. As shown in fig. 2, the smart power amplifier chip 111a drives the first speaker 112a and the second speaker 113a; the smart power amplifier chip 111b drives the first speaker 112b and the second speaker 113b.

In another application scenario, if the terminal device 10 adopts a scheme with 8 speakers, 4 audio output circuits 110 may be configured, so as to implement that 4 smart power amplifier chips drive 8 speakers. As shown in fig. 3, the audio output circuit A1 includes: the intelligent power amplifier chip 111a and a first loudspeaker 112a and a second loudspeaker 113a driven by the intelligent power amplifier chip; the audio output circuit A2 includes: the intelligent power amplifier chip 111b and the first loudspeaker 112b and the second loudspeaker 113b driven by the same, the audio output circuit A3 includes: the smart power amplifier chip 111c and the first speaker 112c and the second speaker 113c driven by the smart power amplifier chip. The audio output circuit A4 includes: the smart power amplifier chip 111d and the first speaker 112d and the second speaker 113d driven by the smart power amplifier chip.

It should be noted that, connections between each smart power amplifier chip and the corresponding first speaker and second speaker in fig. 2 and fig. 3 are only schematic, and specific connection manners may be as shown in fig. 1.

Taking the 8-speaker scheme as an example, the parameter information base stores algorithm parameters corresponding to the first speakers 112a to 112d and the second speakers 113a to 113d, respectively. Taking the audio driving of the audio output circuit A1 as an example, the main chip selects one of the first speaker 112a and the second speaker 113a as a target speaker corresponding to the smart power amplifier chip 111a by comparing the current magnitudes of the first speaker 112a and the second speaker 113a, that is, the smart power amplifier chip 111a performs modeling protection objects of IV temperature protection and amplitude protection, obtains algorithm parameters of the target speaker from a parameter information library, and calibrates the driving algorithm of the smart power amplifier chip 111a, thereby implementing driving of the first speaker 112a and the second speaker 113 a. The driving processes of the audio output circuits A2 to A4 are similar to those of the audio output circuit A1, and are not described herein again.

In some examples, the loudspeaker with relatively large current, i.e. relatively small impedance, of the two parallel loudspeakers driven by the single smart power amplifier chip is taken as the target loudspeaker. That is, for each audio output circuit, if the current value corresponding to the first current signal is greater than or equal to the current value corresponding to the second current signal, the first speaker is determined as the target speaker. And if the current value corresponding to the first current signal is smaller than the current value corresponding to the second current signal, determining the second loudspeaker as the target loudspeaker.

It should be noted that, because the two speakers are connected in parallel to the same audio output interface of the smart power amplifier chip, the voltages at the two ends of the two speakers are equal, and the relationship between the power P and the voltage U, the impedance R: p = U2/R, the smaller the impedance R, the greater the power P. Therefore, a speaker having a smaller impedance R is more easily damaged by overpower. And then according to the relationship among the current I, the voltage U and the impedance R: i = U/R, the smaller the impedance R of the loudspeaker, the larger the current I. Therefore, as long as the speaker with relatively large current is protected, the speaker with relatively small current is naturally protected and cannot overpower.

Under the condition that the models of the two loudspeakers are the same and the structural shapes and sizes of the cavities are the same, only the winding precision in the loudspeaker manufacturing process influences the impedance, so that the impedance of the two loudspeakers has a slight difference. On the basis, a loudspeaker with relatively large current is used as a modeling protection object, and the driving algorithm of the intelligent power amplifier chip is calibrated by using the algorithm parameters of the loudspeaker, so that the temperature protection and the amplitude protection of the two loudspeakers can be realized on one hand, and the two loudspeakers can also exert the maximum performance as far as possible on the other hand.

Considering that the speaker is disposed in the terminal device 10 generally at a side surface, there may be a high frequency loss, and in some examples, when there are a plurality of audio output circuits, the plurality of audio output circuits may be further divided into a first audio output circuit and a second audio output circuit. The first speaker and the second speaker in the first audio output circuit are tweeters. The first speaker and the second speaker in the second audio output circuit are full range speakers or low frequency speakers. Through the frequency division design, the high-low frequency driving enables the sound field of the terminal device 10 to be wider, and is beneficial to maximally guaranteeing the sound effect performance.

It should be noted that, in this document, the audio frequency ranges of the tweeters, the full-range speakers and the woofers may refer to the related art, for example, the audio frequency ranges of some tweeters are 2kHZ to 22kHZ, the audio frequency ranges of full-range speakers are 20HZ to 22kHZ, and the audio frequency ranges of the woofers are: 20Hz-200Hz, which is determined according to the actually adopted product.

For example, when the terminal device 10 employs a 4-speaker scheme, i.e., includes two audio output circuits, one of them may be the first audio output circuit and the other may be the second audio output circuit. That is, the first speaker and the second speaker in one of the audio output circuits are tweeters, and the first speaker and the second speaker in the other audio output circuit are full-band speakers or woofers.

For another example, when the terminal device 10 adopts an 8-speaker scheme, that is, includes four audio output circuits, two of the audio output circuits may be the first audio output circuit, and the other two audio output circuits may be the second audio output circuit. In some examples, the first and second speakers in one of the first audio output circuits and the first and second speakers in one of the second audio output circuits may be disposed on a first side of the terminal device 10, the first and second speakers in another of the first audio output circuits and the first and second speakers in another of the second audio output circuits may be disposed on a second side of the terminal device 10, the second side being a side opposite the first side. Thus, the method is favorable for balancing the space sound field and achieving better sound effect.

For example, in the above example, the audio output circuits A1 and A2 are first audio output circuits, the audio output circuits A3 and A4 are first audio output circuits, the first speakers 112a, 112b and the second speakers 113a, 113b are full-band speakers, and the first speakers 112c, 112d and the second speakers 113c, 113d are tweeters. Then, the first speaker 112a, the second speaker 113a, the first speaker 112c, and the second speaker 113c may be disposed on a first side of the terminal device 10, and the first speaker 112b, the second speaker 113b, the first speaker 112d, and the second speaker 113d may be disposed on a second side of the terminal device 10.

In some examples, as shown in fig. 4, to further optimize spatial audio distribution, the first and second speakers of the respective first and second audio output circuits are disposed axisymmetrically with respect to the same axis. For example, the first speaker 112a and the second speaker 113a, the first speaker 112b and the second speaker 113b, the first speaker 112c and the second speaker 113c, and the first speaker 112d and the second speaker 113d are disposed in axial symmetry with respect to the same axis 400.

In order to more clearly understand the technical solutions provided by the embodiments of the present disclosure, an exemplary workflow of the terminal device 10 is described below.

After the terminal device 10 is started, the smart power amplifier chip 111 in each audio output circuit reads the current signals of the corresponding first speaker 112 and the second speaker 123 through the third pin c and the fourth pin d, and transmits the read first current signal and the read second current signal to the main chip 100 through the interface between the smart power amplifier chip 111 and the main chip 100.

For each audio output circuit, the main chip 100 compares the current values of the first current signal and the second current signal, selects a speaker with a relatively large current value as a target speaker of the audio output circuit, and calls an algorithm parameter corresponding to the target speaker from a parameter information base.

The main chip 100 sends the called algorithm parameter to the corresponding smart power amplifier chip 111, and the smart power amplifier chip 111 drives the connected first speaker 112 and the second speaker 113 according to the algorithm parameter and a preset driving algorithm.

The terminal device 10 provided by the embodiment of the present disclosure effectively implements that one intelligent power amplifier chip drives two speakers connected in parallel, reduces the number of intelligent power amplifier chips that need to be configured in a multi-speaker scene, and effectively reduces the audio development cost of a multi-speaker terminal and the requirement for the power supply capability of the terminal.

It should be noted that the terminal device 10 in each technical solution provided in the embodiment of the present disclosure may be various terminals having an audio/video playing function, for example, a mobile terminal having an audio/video playing function, such as a mobile phone, a wearable device, an intelligent sound device (e.g., an intelligent sound box), a tablet computer, and a laptop computer.

In addition, the embodiment of the disclosure also provides a loudspeaker driving method, which is applied to terminal equipment. The terminal device includes: at least one audio output circuit, each audio output circuit comprising: intelligent power amplifier chip, first speaker and second speaker. In each audio output circuit, a first loudspeaker and a second loudspeaker are connected in parallel to an audio output interface of the intelligent power amplifier chip. The specific circuit structure may refer to the relevant description hereinbefore. As shown in fig. 5, the method may include at least the following steps S501 to S504.

Step S501, acquiring a first current signal of a first loudspeaker and a second current signal of a second loudspeaker;

step S502, selecting a target loudspeaker from the first loudspeaker and the second loudspeaker by comparing the first current signal with the second current signal;

step S503, obtaining the algorithm parameters corresponding to the target loudspeaker from a preset parameter information base, wherein the algorithm parameters corresponding to the first loudspeaker and the algorithm parameters corresponding to the second loudspeaker are stored in the parameter information base;

and step S504, driving the first loudspeaker and the second loudspeaker based on the algorithm parameters corresponding to the target loudspeaker.

In some examples, the terminal device further includes a main chip, such as an application processor. The above speaker driving method may be performed in a main chip. At this time, the main chip needs to perform the above steps S501 to S504 for each audio output circuit, and the parameter information base stores the algorithm parameter corresponding to the first speaker and the algorithm parameter corresponding to the second speaker in each audio output circuit. Further, step S504 specifically includes: the main chip sends the algorithm parameters corresponding to the target loudspeaker to the corresponding intelligent power amplification chip, and the intelligent power amplification chip drives the first loudspeaker and the second loudspeaker according to the algorithm parameters and a preset driving method.

Certainly, in other examples, the speaker driving method may also be executed by an intelligent power amplifier chip, which is not limited in this embodiment.

In some examples, the selecting the target speaker from the first speaker and the second speaker by comparing the first current signal and the second current signal as described above may include: if the current value corresponding to the first current signal is larger than or equal to the current value corresponding to the second current signal, determining the first loudspeaker as a target loudspeaker; and if the current value corresponding to the first current signal is smaller than the current value corresponding to the second current signal, determining the second loudspeaker as the target loudspeaker.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the disclosure may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

The apparatus and method disclosed in the embodiments of the present disclosure may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. The shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The term "plurality" means two or more.

Method embodiments herein may be performed by one processing unit, or by two or more processing units. The above method embodiment may be implemented in a form of hardware, or may be implemented in a form of hardware plus software. Those of ordinary skill in the art will understand that: all or part of the steps of implementing the method embodiments may be implemented by hardware related to program instructions, where the program may be stored in a computer-readable storage medium, and when executed, the program executes steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Moreover, one of ordinary skill in the art would appreciate that combinations of features of the different embodiments herein are within the scope of the disclosure and form different embodiments. The above-described embodiments are intended to be illustrative of the present disclosure and not to be limiting thereof, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims.

Claims (12)

1. A terminal device, comprising: the main chip and at least one audio output circuit, audio output circuit includes: the audio output circuit is characterized by comprising an intelligent power amplifier chip, a first loudspeaker and a second loudspeaker, wherein the first loudspeaker and the second loudspeaker are connected to an audio output interface of the intelligent power amplifier chip in parallel;

the main chip is connected with the intelligent power amplifier chip and is configured as follows: the method comprises the steps of obtaining a first current signal of a first loudspeaker and a second current signal of a second loudspeaker, selecting a target loudspeaker from the first loudspeaker and the second loudspeaker by comparing the first current signal with the second current signal, obtaining an algorithm parameter corresponding to the target loudspeaker from a preset parameter information base, and sending the algorithm parameter corresponding to the target loudspeaker to an intelligent power amplification chip, so that the intelligent power amplification chip drives the first loudspeaker and the second loudspeaker based on the algorithm parameter corresponding to the target loudspeaker, wherein the algorithm parameter corresponding to the first loudspeaker and the algorithm parameter corresponding to the second loudspeaker in the audio output circuit are stored in the parameter information base.

2. The terminal device of claim 1, wherein the master chip is configured to: if the current value corresponding to the first current signal is larger than or equal to the current value corresponding to the second current signal, determining the first loudspeaker as the target loudspeaker; and if the current value corresponding to the first current signal is smaller than the current value corresponding to the second current signal, determining the second loudspeaker as the target loudspeaker.

3. The terminal device of claim 1, wherein the smart power amplifier chip is configured to: respectively collecting a first current signal of the first loudspeaker and a second current signal of the second loudspeaker, and transmitting the collected first current signal and the collected second current signal to the main chip.

4. The terminal device according to claim 3, wherein a first detection sub-circuit and a second detection sub-circuit are disposed in the smart power amplifier chip, the first detection sub-circuit is connected to the first speaker and configured to collect a first current signal of the first speaker, and the second detection sub-circuit is connected to the second speaker and configured to collect a second current signal of the second speaker.

5. The terminal device of claim 4, wherein the smart power amplifier chip comprises: the loudspeaker comprises a first pin, a second pin, a third pin and a fourth pin, wherein the anode of the first loudspeaker is respectively connected with the first pin and the third pin, the anode of the second loudspeaker is respectively connected with the first pin and the fourth pin, and the cathode of the first loudspeaker and the cathode of the second loudspeaker are connected with the second pin;

the third pin is connected with the input end of the first detection sub-circuit, and the fourth pin is connected with the input end of the second detection sub-circuit.

6. The terminal device according to claim 1, wherein in the same audio output circuit, the first speaker and the second speaker are the same in model, and the cavity structures are the same or symmetrical.

7. The terminal device according to claim 1, wherein the plurality of audio output circuits are divided into a first audio output circuit and a second audio output circuit, the first speaker and the second speaker in the first audio output circuit are tweeters, and the first speaker and the second speaker in the second audio output circuit are full-band speakers or woofers.

8. The terminal device according to claim 7, wherein the number of the audio output circuits is four, and the terminal device includes two of the first audio output circuits and two of the second audio output circuits.

9. The terminal device of claim 8, wherein the first speaker and the second speaker in one of the first audio output circuits and the first speaker and the second speaker in one of the second audio output circuits are disposed on a first side of the terminal device, the first speaker and the second speaker in the other of the first audio output circuits and the first speaker and the second speaker in the other of the second audio output circuits are disposed on a second side of the terminal device, the second side being a side opposite to the first side.

10. The terminal device according to claim 9, wherein the first speaker and the second speaker in each of the first audio output circuit and the second audio output circuit are disposed axisymmetrically with respect to the same axis.

11. A speaker driving method is applied to a terminal device, and the terminal device comprises: at least one audio output circuit, the audio output circuit comprising: the audio output circuit comprises an intelligent power amplifier chip, a first loudspeaker and a second loudspeaker, wherein the first loudspeaker and the second loudspeaker are connected to an audio output interface of the intelligent power amplifier chip in parallel, and the method comprises the following steps:

acquiring a first current signal of the first loudspeaker and a second current signal of the second loudspeaker;

selecting a target speaker from the first speaker and the second speaker by comparing the first current signal and the second current signal;

acquiring algorithm parameters corresponding to the target loudspeaker from a preset parameter information base, wherein the algorithm parameters corresponding to the first loudspeaker and the algorithm parameters corresponding to the second loudspeaker are stored in the parameter information base;

and driving the first loudspeaker and the second loudspeaker based on the algorithm parameters corresponding to the target loudspeaker.

12. The method of claim 11, wherein selecting a target speaker from the first speaker and the second speaker by comparing the first current signal and the second current signal comprises:

if the current value corresponding to the first current signal is larger than or equal to the current value corresponding to the second current signal, determining the first loudspeaker as the target loudspeaker;

and if the current value corresponding to the first current signal is smaller than the current value corresponding to the second current signal, determining the second loudspeaker as the target loudspeaker.

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