CN117354405A - Electronic equipment - Google Patents

Abstract

This application discloses an electronic device and relates to the technical field of electronic devices. Electronic equipment, including: a power amplifier; a first speaker, the positive electrode of the first speaker is electrically connected to the positive electrode of the output terminal of the power amplifier, the negative electrode of the first speaker is electrically connected to the negative electrode of the output terminal of the power amplifier; the second speaker is electrically connected to the output terminal of the power amplifier. Connection, wherein when the electronic device is in the first working state, the positive electrode of the second speaker is electrically connected to the negative electrode of the output terminal of the power amplifier, and the negative electrode of the second speaker is electrically connected to the positive output terminal of the power amplifier.

Description

Electronic equipment

Technical field

The present application relates to the technical field of electronic equipment, and specifically relates to an electronic equipment.

Background technique

Mobile electronic devices such as mobile phones and tablets usually use dual speakers to prevent sound leakage when making and receiving calls. The two speakers output sound waves with opposite amplitudes to prevent sound leakage.

In related technologies, two independent audio PAs (Power Amplifiers) are used to drive dual speakers respectively, which causes signal processing and transmission delays, resulting in poor sound leakage prevention effects.

Contents of the invention

The purpose of the embodiments of the present application is to provide an electronic device that can improve signal processing and transmission delays, ensure signal consistency, and solve the problem of poor sound leakage prevention effect.

In a first aspect, embodiments of the present application provide an electronic device, including: a power amplifier; a first speaker, the positive electrode of the first speaker is electrically connected to the positive electrode of the output terminal of the power amplifier, and the negative electrode of the first speaker is connected to the output terminal of the power amplifier. The negative electrode is electrically connected; the second speaker is electrically connected to the power amplifier. When the electronic device is in the first working state, the positive electrode of the second speaker is electrically connected to the negative electrode of the output end of the power amplifier, and the negative electrode of the second speaker is electrically connected to the negative electrode of the power amplifier. Output positive electrical connection.

In the embodiment of the present application, a power amplifier is used to drive the first speaker and the second speaker synchronously. The first speaker is connected to the output end of the power amplifier. When the electronic device is in the first working state, the second speaker is connected to the output end of the power amplifier. At the output end, at this time, the sound wave output by the second speaker is the inverse sound wave of the sound wave output by the first speaker, achieving the effect of preventing sound leakage. Since both the first speaker and the second speaker are driven synchronously by a power amplifier, signal processing and transmission delays can be reduced, signal consistency is ensured, and the problem of poor sound leakage prevention effect is solved.

Description of drawings

Figure 1 shows one of the circuit diagrams of an electronic device provided by some embodiments of the present application;

Figure 2 shows a schematic structural diagram of an electronic device provided in some embodiments of the present application;

Figure 3 shows the second circuit diagram of the electronic device provided by some embodiments of the present application;

Figure 4 shows the third circuit diagram of the electronic device provided by some embodiments of the present application;

Figure 5 shows the fourth circuit diagram of the electronic device provided by some embodiments of the present application;

Figure 6 shows a flow chart of a control method for an electronic device provided by some embodiments of the present application;

Figure 7 shows the fifth circuit diagram of the electronic device provided by some embodiments of the present application;

Figure 8 shows the sixth circuit diagram of the electronic device provided by some embodiments of the present application;

Figure 9 shows the seventh circuit diagram of the electronic device provided by some embodiments of the present application.

The reference numbers in Figures 1 to 9 are as follows:

100 Electronic equipment, 102 power amplifier, 104 first speaker, 106 switch parts, A1 first static contact, A2 second static contact, B1 first movable contact, B2 second movable contact, B3 third movable contact Point, B4 fourth moving contact, 108 second speaker, 110 controller, 112 first sampling terminal, 1122 first detection channel, 1124 second detection channel, 114 second sampling terminal, 1142 third detection channel, 1144 Four detection channels, 120 sampling circuit, R1 first resistor, R2 second resistor, R3 third resistor, 132 panel, 134 middle frame, 136 first sound hole, 138 second sound hole.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art fall within the scope of protection of this application.

The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances so that the embodiments of the application can be practiced in sequences other than those illustrated or described herein, and that "first," "second," etc. are distinguished Objects are usually of one type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the related objects are in an "or" relationship.

The electronic device provided by the embodiments of the present application will be described in detail below with reference to Figures 1 to 9 through specific embodiments and application scenarios.

An embodiment of the present application provides an electronic device. Figure 1 shows one of the circuit diagrams of the electronic device provided by some embodiments of the present application. As shown in Figure 1, the electronic device 100 includes: a power amplifier 102, a first speaker 104 and a second speaker 108.

The positive electrode of the first speaker 104 is electrically connected to the positive electrode of the output terminal of the power amplifier 102, the negative electrode of the first speaker 104 is electrically connected to the negative electrode of the output terminal of the power amplifier 102; the second speaker 108 is electrically connected to the power amplifier 102, wherein, in the electronic device 100 is in the first working state, the positive electrode of the second speaker 108 is electrically connected to the negative electrode of the output terminal of the power amplifier 102, and the negative electrode of the second speaker 108 is electrically connected to the positive output terminal of the power amplifier 102.

In the embodiment of the present application, the power amplifier 102 is electrically connected to the first speaker 104 and the second speaker 108. When the electronic device 100 is in the first working state, the positive terminal of the output terminal of the power amplifier 102 is electrically connected to the positive terminal of the first speaker 104. The negative electrode of the output terminal of the power amplifier 102 is electrically connected to the negative electrode of the first speaker 104 and the positive electrode of the second speaker 108 . The power amplifier 102 is used to output drive signals. The first speaker 104 receives the positive-phase drive signal and outputs the positive-phase sound wave. Since the positive and negative poles of the second speaker 108 are reversely connected to the output end of the power amplifier 102, the second speaker 108 receives The reverse-phase driving signal is received and the reverse-phase sound wave is output. The sound leakage of the electronic device 100 can be reduced through the cancellation of the reverse-phase sound wave.

Figure 2 shows a schematic structural diagram of an electronic device provided in some embodiments of the present application. As shown in Figure 2, the first speaker 104 and the second speaker 108 are disposed in the body of the electronic device 100, and the first speaker 104 corresponds to The first sound hole 136 is provided on the panel 132 , and the second sound hole 138 corresponding to the second speaker 108 is provided on the middle frame 134 . The second speaker 108 outputs a sound wave in the opposite phase to that of the first speaker 104 through the second sound hole 138, and counteracts the normal-phase sound wave output from the frame position, thereby preventing sound leakage.

In the embodiment of the present application, when the electronic device 100 is in the first working state, the second speaker 108 is reversely connected to the output end of the power amplifier 102 to output a sound wave with an opposite phase to the sound wave output by the first speaker 104, which can respond to the first sound wave. The sound waves output by the speaker 104 undergo phase inversion and cancellation, thereby reducing sound leakage from the electronic device 100 .

Illustratively, the first working state is the voice call state, video call state, etc. of the electronic device 100 . When the user makes a call through the electronic device 100, inverted sound waves are output through the second speaker 108, and the overflowing sound waves output by the first speaker 104 are inverted and canceled, thereby preventing sound leakage in the electronic device 100.

In the embodiment of the present application, the power amplifier 102 is used to convert the digital audio signal into an analog audio signal when receiving a digital audio signal, and drive the first speaker 104 and the second speaker 108 through the analog audio signal, where the analog The audio signal is the driving signal.

In the embodiment of the present application, in the first working state, the sound wave output by the second speaker is the opposite phase sound wave of the sound wave output by the first speaker, that is, the amplitude phase between the sound wave output by the first speaker and the sound wave output by the second speaker is matching and opposite in phase. When the first working state is a voice call, the sound hole of the first speaker 104 faces the human ear, and the sound hole of the second speaker 108 faces outward. The first speaker 104 outputs the sound wave output by the first speaker, and the second speaker 104 outputs the sound wave. When the speaker 108 outputs the sound wave output by the second speaker, the user can hear the sound wave output by the first speaker 104 and other people can hear the superposed sound wave output by the first speaker 104 and the second speaker 108 . , since the sound waves output by the first speaker and the sound waves output by the second speaker are superimposed and canceled with opposite phases, the effect of preventing sound leakage is achieved. When the user plays audio through the electronic device 100, the switch 106 is controlled to switch to the first switch 106 state, and both the first speaker 104 and the second speaker 108 output the sound wave output by the first speaker.

In the embodiment of the present application, the first speaker 104 and the second speaker 108 are driven synchronously through a power amplifier 102. The first speaker 104 is connected to the output end of the power amplifier 102. When the electronic device is in the first working state, the second speaker 108 When connected inversely to the output end of the power amplifier 102, at this time, the sound wave output by the second speaker 108 is the inverse sound wave of the sound wave output by the first speaker 104, thereby achieving the effect of preventing sound leakage. Since both the first speaker 104 and the second speaker 108 are driven synchronously by a power amplifier 102, signal processing and transmission delays can be reduced, signal consistency is ensured, and the problem of poor sound leakage prevention effect is solved.

In some embodiments of the present application, when the electronic device 100 is in the second working state, the positive electrode of the second speaker 108 is electrically connected to the positive output terminal of the power amplifier 102, and the negative electrode of the second speaker 108 is electrically connected to the output negative electrode of the power amplifier 102. Electrical connection.

In the embodiment of the present application, when the electronic device 100 is in the second working state, the second speaker 108 is connected to the output terminal of the power amplifier 102 . That is, in the second working state of the electronic device 100, the positive electrode of the second speaker 108 is electrically connected to the positive electrode of the output terminal of the power amplifier 102, and the negative electrode of the second speaker 108 is electrically connected to the negative electrode of the output terminal of the power amplifier 102. At this time, the second The sound waves output by the speaker 108 and the first speaker 104 are in-phase sound waves, so the sound waves output by the first speaker 104 can be enhanced.

For example, the second working state may be the external playback mode of the electronic device 100, such as: call playback mode, video playback mode, and audio playback mode.

In the embodiment of the present application, when the electronic device 100 switches between the first working mode and the second working mode, the second speaker 108 can switch between the positive connection and the reverse connection with the power amplifier 102. When the electronic device 100 is running in the first working mode, In one working mode, the second speaker 108 is connected to the output end of the power amplifier 102 in reverse, and the first speaker 104 is directly connected to the output end of the power amplifier 102, so that the sound waves output by the second speaker 108 have opposite phases to the sound waves output by the first speaker 104. , to prevent sound leakage. When the electronic device 100 is running in the second working mode, the second speaker 108 and the first speaker 104 are both connected to the output end of the power amplifier 102, so that the sound wave output by the second speaker 108 has the same phase as the sound wave output by the first speaker 104. , which has the effect of enhancing sound waves. By switching between the first working mode and the second working mode, the electronic device 100 can switch the forward connection and the reverse connection of the second speaker 108, thereby achieving switching between the sound leakage prevention effect and the sound wave enhancement effect.

Figure 3 shows the second circuit diagram of the electronic device provided by some embodiments of the present application. As shown in Figure 3, in some embodiments of the present application, the electronic device further includes a switch component, and the switch component includes: a first static contact Point A1, second stationary contact A2, first movable contact B1, second movable contact B2, third movable contact B3, and fourth movable contact B4.

The first static contact A1 is electrically connected to the positive terminal of the output terminal of the power amplifier 102; the second static contact A2 is electrically connected to the negative terminal of the output terminal of the power amplifier 102; the first movable contact B1 is electrically connected to the positive terminal of the second speaker 108; The second movable contact B2 is electrically connected to the negative electrode of the second speaker 108; the third movable contact B3 is electrically connected to the positive electrode of the second speaker 108; the fourth movable contact B4 is electrically connected to the negative electrode of the second speaker 108;

Wherein, when the electronic device 100 is in the first working state, the first static contact A1 is electrically connected to the second movable contact B2, and the second static contact A2 is electrically connected to the third movable contact B3; the electronic device is in the second working state. In the working state, the first static contact A1 is electrically connected to the first movable contact B1, and the second static contact A2 is electrically connected to the fourth movable contact B4.

In the embodiment of the present application, the switch component 106 is a 2-to-4 switch component. The switch component 106 includes two static contacts, a first static contact A1 and a second static contact A2, as well as a first movable contact B1, There are four movable contacts in total: the second movable contact B2, the third movable contact B3 and the fourth movable contact B4. Among them, the first static contact A1 and the second static contact A2 are electrically connected to the positive pole and the negative pole of the output terminal of the power amplifier 102 respectively, and the first movable contact B1 and the third movable contact B3 are both connected to the second speaker 108 The positive electrode of the second speaker 108 is electrically connected, and the second movable contact B2 and the fourth movable contact B4 are both electrically connected to the negative electrode of the second speaker 108 . The first stationary contact A1 can be switched between the first movable contact B1 and the third movable contact B3, and the second stationary contact A2 can be switched between the second movable contact B2 and the fourth movable contact B4. The control logic of the switch 106 is described in detail below:

When the electronic device 100 is in the first working state, when controlling the second speaker 108 to output a sound wave with an opposite phase to the sound wave output by the first speaker 104, the switch member 106 needs to be switched to the second switch state, that is, the first static contact. A1 is electrically connected to the second movable contact B2, and the second static contact A2 is electrically connected to the third movable contact B3, so that the positive terminal of the output terminal of the power amplifier 102 is connected to the negative terminal of the second speaker 108, and the output of the power amplifier 102 The negative terminal is connected to the positive terminal of the second speaker 108 .

When the electronic device is in the second working state, when controlling the first speaker 104 and the second speaker 108 to output sound waves in the same phase, it is necessary to electrically connect the first static contact A1 and the first movable contact B1 of the control switch member 106. The two stationary contacts A2 are electrically connected to the fourth movable contact B4, so that the positive terminal of the output terminal of the power amplifier 102 is connected to the positive terminal of the second speaker 108, and the negative terminal of the output terminal of the power amplifier 102 is connected to the negative terminal of the second speaker 108.

In the embodiment of the present application, the switch member 106 includes two static contacts and four movable contacts. By switching the connection relationship between the two static contacts and the four movable contacts of the switch member 106, the second speaker can be switched. The connection relationship between the positive and negative poles of 108 and the positive and negative poles of the power amplifier 102 enables the second speaker 108 to switch between outputting the first sound wave and the second sound wave, by providing a 2-to-4 switch 106 in the electronic device 100 , and controls the 2-to-4 switch member 106 to reverse the positive and negative poles of the second speaker 108, thereby realizing switching between the sound leakage prevention function and the external amplifier function.

Figure 4 shows the third circuit diagram of the electronic device provided by some embodiments of the present application. As shown in Figure 4, in some embodiments of the present application, the electronic device further includes: a switch member 106, and a first part of the switch member 106. The second end of the switch member 106 is electrically connected to the positive electrode of the second speaker 108 , and the third end of the switch member 106 is electrically connected to the positive electrode of the output end of the power amplifier 102 . The switch member 106 The fourth terminal is electrically connected to the negative electrode of the second speaker 108;

Wherein, when the electronic equipment is in the first working state, the first end and the second end of the switch member 106 are connected, the third end and the fourth end of the switch member 106 are connected, the electronic equipment is in the second working state, and the switch member 106 is connected. The first end and the second end of the switch member 106 are disconnected, and the third end and the fourth end of the switch member 106 are disconnected.

In the embodiment of the present application, the electronic device 100 further includes a switch 106, which is connected between the power amplifier 102 and the second speaker 108. By controlling the on-off state of the switch 106, it can be controlled whether the second speaker 108 communicates with the second speaker 108. Whether the power amplifiers 102 are connected to each other.

For example, when the electronic device 100 is in the first working state and the switch 106 is in the conductive state, the positive electrode of the second speaker 108 is electrically connected to the negative electrode of the output terminal of the power amplifier 102, and the negative electrode of the second speaker 108 is electrically connected to the power amplifier. The positive terminal of the output terminal 102 is electrically connected. At this time, the second speaker 108 can output a sound wave with an opposite phase to that of the first speaker 104, thereby preventing sound leakage in the electronic device 100. When the electronic device 100 is in the second working state and the switch 106 is in the off state, the second speaker 108 and the power amplifier 102 are disconnected.

In the embodiment of the present application, a switch 106 is provided between the power amplifier 102 and the second speaker 108. By controlling the on-off state of the switch 106, the on-off state between the power amplifier 102 and the second speaker 108 can be controlled, thereby By controlling whether the second speaker 108 outputs a sound wave with an opposite phase to that of the first speaker 104, the switch 106 can be used to control whether the electronic device 100 turns on the sound leakage prevention function.

Figure 5 shows the fourth circuit diagram of the electronic device provided by some embodiments of the present application. As shown in Figure 5, in some embodiments of the present application, the electronic device 100 also includes: a controller 110 and a sampling circuit 120. Control The controller 110 is electrically connected to the first speaker through the sampling circuit 120 to obtain the driving current or driving voltage of the first speaker; and/or the controller 110 is electrically connected to the second speaker through the sampling circuit 120 to obtain the driving current or driving voltage of the second speaker. Voltage.

In this embodiment of the present application, the controller 110 may be a CPU (Central Processing Unit) of the electronic device 100, and the sampling circuit 120 is used to collect the driving current or driving voltage of at least one of the first speaker 104 and the second speaker 108, The controller 110 is enabled to perform over-current protection or over-voltage protection on at least one of the first speaker 104 and the second speaker 108 based on the collected driving current or driving voltage.

In the embodiment of the present application, the sampling circuit 120 is connected between the first speaker 104 and the controller 110. Through the sampling circuit 120, the controller 110 can collect the driving current of the first speaker 104 and compare the driving current with the current threshold. The first speaker 104 detects whether there is an overcurrent problem, and when the first speaker 104 is in an overcurrent state, it stops outputting signals to the first speaker 104 to drive, thus achieving the effect of overcurrent protection for the first speaker 104 . The controller 110 can collect the driving voltage of the first speaker 104 through the sampling circuit 120, compare the driving voltage with the voltage threshold, detect whether there is an overvoltage problem in the first speaker 104, and detect when the first speaker 104 is in an overvoltage state. , the signal output to the first speaker 104 is stopped for driving, thereby achieving the effect of over-voltage protection for the first speaker 104 .

In the embodiment of the present application, the sampling circuit 120 is connected between the second speaker 108 and the controller 110. Through the sampling circuit 120, the controller 110 can collect the driving current of the second speaker 108 and compare the driving current with the current threshold. The second speaker 108 detects whether there is an over-current problem, and when the second speaker 108 is in an over-current state, it stops outputting signals to the second speaker 108 to drive, thus achieving the effect of over-current protection for the second speaker 108 . The controller 110 can collect the driving voltage of the second speaker 108 through the sampling circuit 120, and detect whether there is an overvoltage problem in the second speaker 108 by comparing the driving voltage with the voltage threshold, and detect when the second speaker 108 is in an overvoltage state. , the signal output to the second speaker 108 is stopped for driving, thereby achieving the effect of over-voltage protection for the second speaker 108 .

In the embodiment of the present application, the electronic device 100 can collect the driving current or driving voltage of the first speaker 104 through the sampling circuit 120, so as to provide over-current protection or over-voltage protection for the first speaker 104. The electronic device 100 can collect the driving current or driving voltage of the second speaker 108 through the sampling circuit 120 to provide over-current protection or over-voltage protection for the second speaker 108 .

In the embodiment of the present application, the controller 110 and the sampling circuit 120 collect the driving current or driving voltage of the first speaker 104 and the driving current or driving voltage of the second speaker 108, so that the power amplifier does not need to collect the first speaker 104 and the driving voltage of the second speaker 108. The driving current or driving voltage of either of the two speakers 108 reduces the computing power consumption of the power amplifier and also improves the operating stability of the first speaker 104 and the second speaker 108 .

In some embodiments of the present application, the controller 110 is electrically connected to the power amplifier and configured to output audio signals to the power amplifier.

In the embodiment of the present application, the controller 110 is electrically connected to the power amplifier, and the controller 110 can output an audio signal to the power amplifier, that is, the controller 110 outputs an audio signal to the power amplifier, thereby controlling the power amplifier to transmit audio signals to the first speaker 104 and the second speaker 104 . The speaker 108 outputs a driving signal to drive the first speaker 104 and the second speaker 108 .

In the embodiment of the present application, the controller 110 can output a digital audio signal to the power amplifier. When the power amplifier receives the digital audio signal, it converts the digital audio signal into an analog audio signal, and drives the first speaker 104 through the analog audio signal. and second speaker 108.

In the embodiment of the present application, the controller 110 outputs audio signals to the power amplifier, so that the power amplifier can synchronously drive the first speaker 104 and the second speaker 108 to output audio synchronously, further reducing the computing power requirements of the power amplifier.

In some embodiments of the present application, the controller 110 is electrically connected to the switch component 106 and controls the on-off state of the switch component 106 .

In the embodiment of the present application, the electronic device 100 includes a switch 106. The on-off state of the switch 106 can control the electronic device 100 to switch between the first working state and the second working state. The controller 110 is connected to the switch 106. On the control side, the controller 110 can adjust the on-off state of the switch member 106 through control signals.

For example, when the switch member 106 is a 2-to-4 switch, when the electronic device 100 is in the first working state, the first static contact A1 is electrically connected to the second movable contact B2, and the second static contact A2 is electrically connected to the second movable contact B2. The three movable contacts B3 are electrically connected; when the electronic device 100 is in the second working state, the first static contact A1 is electrically connected to the first movable contact B1, and the second static contact A2 is electrically connected to the fourth movable contact B4.

For example, if the switch 106 is a switch connected between the second speaker 108 and the power amplifier, when the electronic device 100 is in the first working state, the switch 106 is controlled to be turned on so that the second speaker 108 can output the The first speaker 104 generates sound waves with opposite phases. When the electronic device 100 is in the second working state, the switch member 106 is controlled to be turned off.

In the embodiment of the present application, the on-off state of the switch 106 is controlled by the controller 110, and the controller 110 can be used to output an audio signal to the power amplifier, so as to determine whether the second speaker 108 outputs a sound wave to reflect the sound wave output by the first speaker 104. Control by offsetting each other to improve control accuracy.

In some embodiments of the present application, after the controller 110 switches the electronic device 100 to the first working state or the second working state by controlling the on-off state of the switch 106, the controller 110 outputs an audio signal to the power amplifier, and the power The amplifier outputs drive signals to the first speaker 104 and the second speaker 108 based on the audio signal.

In the embodiment of the present application, the controller 110 can control the switch 106 to adjust the on-off state, thereby switching the electronic device 100 between the first working state and the second working state. After the controller 110 adjusts the working state of the electronic device 100 , the controller 110 outputs an audio signal to the power amplifier, so that the first speaker 104 and the second speaker 108 output sound waves according to the first working state or the second working state.

Exemplarily, the controller can be used to run the electronic device, and the control method of the electronic device is used for the controller. Figure 6 shows a flow chart of the control method of the electronic device provided by some embodiments of the present application, as shown in Figure 6 According to the instructions, the control methods of electronic equipment include:

Step 602: Determine whether the audio channel is opened to request a response. If the judgment result is yes, step 604 is executed. If the judgment result is otherwise, the process ends;

In this embodiment of the present application, the controller determines whether to control the request to operate the power amplifier. For example, if the controller receives a request to turn on the power amplifier and responds to the request, the power amplifier is controlled to run, and the controller executes step 604, otherwise the process ends.

Step 604: Determine whether the upward path is opened to request a response. If the judgment result is yes, step 606 is executed. If the judgment result is otherwise, the process ends;

In this embodiment of the present application, the controller determines whether a request to control the operation of the speaker is received. For example, the controller receives a request to control turning on the speaker, such as a call request, a video playback request, etc., and in response to the request, the controller executes step 606, otherwise the process ends.

Step 606, determine whether it is the anti-sound leakage mode. If the determination result is yes, execute step 608; if the determination result is no, execute step 610;

It should be noted that the sound leakage prevention mode is the second mode in any of the above embodiments, and the other modes are the first mode. For example, the other modes are the external amplifier mode.

Step 608, control the switch member to switch to the first switch state;

In the embodiment of the present application, the switch member is in the first switching state, and the electronic device runs in the first working state;

Step 610, control the switch member to switch to the second switch state;

In the embodiment of the present application, the switch member is in the second switching state, and the electronic device operates in the second working state;

Step 612, the controller sends audio data;

Step 614, determine whether the response is completed. If the determination result is yes, execute step 616. If the determination result is otherwise, the process ends;

Step 616, restore the initial switch state;

For example, the initial switch state may be the first switch state, the second switch state, or the off state.

Step 618, the controller detects current and/or voltage;

Step 620, determine whether there is overcurrent or overvoltage. If the determination result is yes, execute step 622. If the determination result is otherwise, return to step 618;

Step 622: Reduce the output voltage and/or output current.

In the embodiment of the present application, after it is determined that the audio path opening request response is received, and the uplink path opening request response is determined, it is determined that the electronic device 100 needs to output audio. Determine the audio output mode of the electronic device 100. When the electronic device 100 is in the sound leakage prevention mode, control the switch member 106 to switch to the second switch state, so that the second speaker 108 outputs the second sound wave, and the first speaker 104 outputs the first sound wave. The sound waves cancel each other out. When the electronic device 100 is not in the sound leakage prevention mode, the switch member 106 is controlled to switch to the first switch state, so that the second speaker 108 and the first speaker 104 output the first sound wave synchronously. After the response is completed, the control switch 106 returns to the initial switch state and waits for the next audio path opening request response and the uplink path opening request response.

In the embodiment of the present application, after the switch 106 is switched to the first switch state or the second switch state, the controller continuously detects the driving current and driving voltage of the first speaker 104 and the second speaker 108, and determines the first speaker accordingly. 104 and the second speaker 108 to determine whether overcurrent and/or overvoltage exist. When overcurrent and/or overvoltage are detected, the output current and/or output voltage are reduced.

In the embodiment of the present application, the electronic device 100 can automatically adjust the switching state of the switch 106 according to the audio output mode, and control the sound wave output by the second speaker 108 to superpose or cancel the sound wave output by the first speaker 104 in positive phase or in reverse phase, thereby achieving Switching between the sound leakage prevention mode and the external sound mode of the electronic device 100 . And when the first speaker 104 and the second speaker 108 output sound waves, the driving current and driving voltage of the first speaker 104 and the second speaker 108 can be detected, so as to provide overvoltage protection to the first speaker 104 and the second speaker 108 and overcurrent protection.

For example, the controller 110 transmits a switch control signal to the switch 106 to control the switch 106, and the controller 110 transmits an I2S (Inter-IC Sound, integrated circuit built-in audio bus) digital audio signal to the power amplifier 102, so that The power amplifier 102 outputs a drive signal.

In the embodiment of the present application, the controller 110 controls the switch 106 to switch to an on-off state matching the first working state or the second working state, and then outputs the audio signal to the power amplifier 102 so that the power amplifier 102 can drive the first working state. The loudspeaker 104 and the second loudspeaker 108 operate so that the electronic device runs in the first working state. The first loudspeaker 104 and the second loudspeaker 108 can output anti-phase sound waves and perform sound leakage prevention processing on the output sound waves.

In some embodiments of the present application, the first sampling terminal 112 of the controller 110 is electrically connected to the positive electrode of the first speaker 104 for obtaining the first driving current of the first speaker 104, and the controller 110 is used for obtaining the first driving current according to the first driving current. The current protects the first speaker 104 from overcurrent and overvoltage;

The sampling circuit includes a first resistor R1, a first end of the first resistor R1 is electrically connected to the power amplifier 102, and a second end of the first resistor R1 is electrically connected to the first speaker 104;

The first sampling terminal 112 of the controller 110 includes a first detection channel 1122 and a second detection channel 1124. The first detection channel 1122 is electrically connected to the first end of the first resistor R1, and the first detection channel 1122 is used to collect the first voltage. value, the second detection channel 1124 is electrically connected to the second end of the first resistor R1, and the second detection channel 1124 is used to collect the second voltage value;

The controller 110 is used to determine the first driving current of the first speaker 104 according to the first voltage value and the second voltage value.

In the embodiment of the present application, the controller 110 includes a first sampling terminal 112 electrically connected to the positive electrode of the first speaker 104. The controller 110 can obtain the first driving current of the first speaker 104 through the first sampling terminal 112. The controller 110 The first driving current can also be used to protect the first speaker 104 from overcurrent and overvoltage.

Specifically, the sampling circuit includes a first resistor R1 connected between the power amplifier 102 and the first speaker 104. The controller 110 can collect the first detection channel 1122 and the second detection channel 1124 of the first sampling terminal 112. voltage value and the second voltage value, and calculate the first driving current of the first speaker 104 based on the first voltage value and the second voltage value, thereby performing overcurrent and overvoltage protection on the first speaker 104 through the first driving current. . In the embodiment of the present application, the first sampling terminal 112 of the controller 110 includes a first detection channel 1122 and a second detection channel 1124, and the first driving current of the first speaker 104 is calculated through the following formula (1):

I ₁ =(V ₂ -V ₁ )/R ₁ ; (1)

Among them, I ₁ is the first driving current, V ₁ is the voltage value collected by the first detection channel 1122, V ₂ is the voltage value collected by the second detection channel 1124, and R ₁ is the resistance value of the first resistor R1.

Illustratively, the first resistor R1 is disposed between the positive electrode of the power amplifier 102 and the positive electrode of the first speaker 104 .

In this embodiment of the present application, the first driving current can be used to protect the first speaker 104 from overcurrent. By comparing the detected first driving current with the first current threshold, it can be determined whether the first speaker 104 is in an overcurrent state. When the first driving current is greater than the first current threshold, the output power to the first speaker 104 is reduced. current value, thereby providing over-current protection to the first speaker 104.

In the embodiment of the present application, the first driving voltage of the first speaker 104 is calculated through the following formula (2):

V _{speaker 1} = I _1× R _{speaker 1} ; (2)

Among them, V _{speaker 1} is the first drive voltage, R _{speaker 1} is the impedance of the first speaker, and I ₁ is the first drive current.

In the embodiment of this application, the impedance of the first speaker is calculated through the following formula (3):

R _{speaker 1} =|V ₂ -V1|/I ₁ ; (3)

Among them, R _{speaker 1} is the impedance of the first speaker 104, V ₁ is the voltage value collected by the first detection channel 1122, V ₂ is the voltage value collected by the second detection channel 1124, and I ₁ is the first driving current.

In the embodiment of the present application, the second sampling terminal 114 of the controller 110 includes a third detection channel 1142 and a fourth detection channel 1144, and the first driving current of the second speaker 108 is calculated through the following formula (4):

I ₂ =(V ₃ -V ₄ )/R ₂ ; (4)

Among them, I ₂ is the second driving current, V ₃ is the voltage value collected by the third detection channel 1142, V ₄ is the voltage value collected by the fourth detection channel 1144, and R ₂ is the resistance value of the second resistor R2.

Illustratively, the second resistor R2 is disposed between the switch member 106 and the positive electrode of the second speaker 108 .

In this embodiment of the present application, the second driving current can provide over-current protection to the second speaker 108 . By comparing the detected second driving current with the second current threshold, it can be determined whether the second speaker 108 is in an overcurrent state. When the second driving current is greater than the second current threshold, the output power to the second speaker 108 is reduced. current value, thereby providing over-current protection to the second speaker 108 .

In the embodiment of the present application, the second driving voltage of the second speaker 108 is calculated through the following formula (5):

V _{speaker 2} = I _{2 ×} R _{speaker 2} ; (5)

Among them, V _{speaker 2} is the second drive voltage, R _{speaker 2} is the impedance of the second speaker, and I ₂ is the second drive current.

In the embodiment of this application, the impedance of the second speaker is calculated through the following formula (6):

R _{speaker 2} = |V ₃ -V ₄ |/I ₂ ; (6)

Among them, R _{speaker 2} is the impedance of the second speaker 108, V ₃ is the voltage value collected by the third detection channel 1142, V ₄ is the voltage value collected by the fourth detection channel 1144, and I ₂ is the second driving current.

In the embodiment of the present application, by comparing the detected second driving voltage with the second voltage threshold, it can be determined whether the second speaker 108 is in an overvoltage state. When the second driving voltage is greater than the second voltage threshold, the voltage is reduced to The voltage value output by the second speaker 108 is used to protect the second speaker 108 from overvoltage.

In the embodiment of the present application, the third detection channel 1142 and the fourth detection channel 1144 in the second sampling terminal 114 of the controller are connected to both ends of the second resistor R2, and then according to the collected third voltage value and the third The four voltage values determine the second driving current of the second speaker 108, thereby enabling the controller 110 to perform overcurrent and overvoltage protection on the second speaker 108 based on the second driving current.

As shown in FIG. 5 , the first sampling terminal 112 of the controller 110 includes a first detection channel 1122 and a second detection channel 1124 , and the second sampling terminal 114 of the controller 110 includes a third detection channel 1142 and a fourth detection channel 1144 . Among them, the first detection channel 1122, the second detection channel 1124, the third detection channel 1142 and the fourth detection channel 1144 are all connected to a third resistor R3.

In some embodiments of the present application, FIG. 7 shows the fifth circuit diagram of an electronic device provided by some embodiments of the present application. As shown in FIG. 7 , the number of power amplifiers 102 is at least two, and the first speaker 104 The number of second speakers 108 matches the number of power amplifiers 102; wherein each of the at least two power amplifiers 102 is electrically connected to one first speaker 104, and each power amplifier 102 passes through a switch. Element 106 is electrically connected to a second speaker 108 .

In this embodiment of the present application, at least two power amplifiers 102 are provided in the electronic device 100 , and each power amplifier 102 is connected to a first speaker 104 and connected to a second speaker 108 through a switch 106 . Wherein, the number of power amplifiers 102 is N, so the total number of first speakers 104 and second speakers 108 is 2N, and each power amplifier 102 is used to drive one first speaker 104 and one second speaker 108 .

As shown in FIG. 7 , for example, the number of power amplifiers 102 is two, the number of first speakers 104 is also two, the number of second speakers 108 is also two, and the number of switching elements 106 is also two. , each power amplifier 102 is connected to a first speaker 104 and a switch element 106, and each switch element 106 is connected to a second speaker 108.

In the embodiment of the present application, multiple power amplifiers 102 are provided in the electronic device 100, and each power amplifier 102 is used to drive a first speaker 104 and a second speaker 108, so that multiple second speakers in the electronic device 100 Each of the speakers 108 can switch the positive and negative electrodes through a switch to perform positive phase superposition or negative phase cancellation on the first sound wave output by the corresponding first speaker 104 .

In some embodiments of the present application, FIG. 8 shows the sixth circuit diagram of the electronic device provided by some embodiments of the present application. As shown in FIG. 8 , the number of the first speakers 104 is at least two, and at least two second speakers 104 are provided. Each speaker 104 is electrically connected to the power amplifier 102 .

In this embodiment of the present application, the electronic device 100 includes at least two first speakers 104 , and the at least two first speakers 104 are both electrically connected to the power amplifier 102 . It should be noted that at least two first speakers 104 and one second speaker 108 are driven synchronously through a power amplifier 102. When the sound leakage prevention function needs to be implemented, the second sound wave is output through the second speaker 108 to at least two first speakers. The first sound wave output by the speaker 104 is inverted and canceled.

As shown in FIG. 8 , for example, a power amplifier 102 , two first speakers 104 and a second speaker 108 are provided in the electronic device 100 . The power amplifier 102 is electrically connected to the first speaker 104 through a switch 106 , and the power amplifier 102 is electrically connected to at least two first speakers 104 .

In the embodiment of the present application, a power amplifier 102 is provided in the electronic device 100, and the power amplifiers 102 are used to drive at least two first speakers 104 and a second speaker 108, so that the second speaker 108 in the electronic device 100 can pass By switching the positive and negative poles, the first sound waves output by the at least two first speakers 104 are added in positive phase or canceled in reverse phase.

In some embodiments of the present application, FIG. 9 shows the seventh circuit diagram of the electronic device provided by some embodiments of the present application. As shown in FIG. 9 , the number of the second speakers 108 is at least two, and at least two second speakers 108 are used. The two speakers 108 are both electrically connected to the power amplifier 102 through the switch 106 .

In the embodiment of the present application, the electronic device 100 includes at least two second speakers 108 , and the at least two second speakers 108 are electrically connected to the power amplifier 102 through the switch 106 . It should be noted that the first speaker 104 and at least two second speakers 108 are driven synchronously through a power amplifier 102. When the sound leakage prevention function needs to be implemented, the second sound waves are outputted through the at least two second speakers 108 to the first speaker. The first sound wave output by 104 is inverted and canceled.

Exemplarily, at least two second speakers 108 respectively correspond to at least two second sound holes 138 , and the at least two second sound holes 138 are respectively disposed on different side walls of the electronic device 100 , so that the at least two second sound holes 138 The speaker 108 can perform positive phase superposition or anti-phase cancellation on the first sound wave output by the first speaker 104 in different directions.

For example, if the number of the second sound holes 138 is three, then the three second sound holes 138 are respectively disposed on different frames of the middle frame 134 .

For example, if there are two second sound holes 138 , one of the second sound holes 138 is disposed on the middle frame 134 , and the other second sound hole 138 is disposed on the back panel of the electronic device 100 .

For example, when the number of second speakers 108 is at least two, the number of switch members 106 is the same as the number of second speakers 108 , and at least two switch members 106 are connected to at least two second speakers 108 respectively. and power amplifier 102.

For example, the number of second speakers 108 is N, the number of switch components 106 is M, and the N second speakers 108 are electrically connected to the power amplifier 102 through M switch components 106, where N and M are both positive. Integer, and N≥M.

As shown in FIG. 9 , for example, a power amplifier 102 , a first speaker 104 and two second speakers 108 are provided in the electronic device 100 . The power amplifier 102 is electrically connected to the two second speakers 108 through two switches 106 . connected, and the power amplifier 102 is electrically connected to the first speaker 104 .

In the embodiment of the present application, a power amplifier 102 is provided in the electronic device 100, and the power amplifiers 102 are used to drive the first speaker 104 and at least two second speakers 108, so that the at least two second speakers in the electronic device 100 108 can perform positive phase superposition or negative phase cancellation on the first sound wave output by the first speaker 104 by switching the positive and negative poles.

In some embodiments of the present application, the electronic device 100 further includes: a panel 132 and a middle frame 134. The panel 132 is provided with a first sound hole 136. The first sound hole 136 is used to transmit the first sound output by the first speaker 104. Sound wave; the middle frame 134 is electrically connected to the panel 132. The middle frame 134 is provided with a second sound hole 138. The second sound hole 138 is used to transmit the first sound wave or the second sound wave output by the second speaker 108.

In the embodiment of the present application, the electronic device 100 includes a panel 132 and a middle frame 134. By arranging the first sound hole 136 corresponding to the first speaker 104 on the panel 132, the user can make a voice call through the electronic device 100. After listening to the first sound wave output by the first speaker 104, the first sound hole 136 corresponding to the first speaker 104 is provided on the middle frame 134, so that when the anti-sound leakage function needs to be turned on, the sound wave is output through the second speaker 108. The second sound wave inversely cancels the leaked first sound wave output by the first speaker 104 to prevent other people from hearing the user's call content.

Exemplarily, the electronic device 100 further includes a backplane. When the number of the second sound holes 138 is multiple, the plurality of second sound holes 138 can be respectively disposed on the middle frame 134 and the backplane. The first sound wave output by the first speaker 104 is inverted and canceled in the direction.

It should be noted that during the voice call, since the first sound hole 136 is aligned with the human ear, the first sound wave transmitted through the first sound hole 136 can directly enter the human ear, and the second speaker 108 outputs an inverted sound wave. When the second sound wave is generated, it will not affect the human ear to listen to the first sound wave output by the first speaker 104.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" or the like is intended to be incorporated into the description of the implementation. An example or example describes a specific feature, structure, material, or characteristic that is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principles and purposes of the present application. The scope of the application is defined by the claims and their equivalents.

Claims (10)

1. An electronic device, comprising:

a power amplifier;

the positive electrode of the first loudspeaker is electrically connected with the positive electrode of the output end of the power amplifier, and the negative electrode of the first loudspeaker is electrically connected with the negative electrode of the output end of the power amplifier;

and the second loudspeaker is electrically connected with the power amplifier, wherein the anode of the second loudspeaker is electrically connected with the cathode of the output end of the power amplifier when the electronic equipment is in the first working state, and the cathode of the second loudspeaker is electrically connected with the output anode of the power amplifier.

2. The electronic device of claim 1, wherein in the second operational state of the electronic device, the anode of the second speaker is electrically connected to the anode of the output of the power amplifier, and the cathode of the second speaker is electrically connected to the cathode of the output of the power amplifier.

3. The electronic device of claim 2, further comprising: a switch member, the switch member comprising:

the first stationary contact is electrically connected with the positive electrode of the output end of the power amplifier;

the second stationary contact is electrically connected with the negative electrode of the output end of the power amplifier;

a first movable contact electrically connected to the positive electrode of the second speaker;

the second movable contact is electrically connected with the negative electrode of the second loudspeaker;

a third movable contact electrically connected with the positive electrode of the second loudspeaker;

a fourth movable contact electrically connected to the negative electrode of the second speaker;

the first fixed contact is electrically connected with the second movable contact, and the second fixed contact is electrically connected with the third movable contact when the electronic equipment is in the first working state;

and when the electronic equipment is in the second working state, the first fixed contact is electrically connected with the first movable contact, and the second fixed contact is electrically connected with the fourth movable contact.

4. The electronic device of claim 1, further comprising: the first end of the switch piece is electrically connected with the negative electrode of the output end of the power amplifier, the second end of the switch piece is electrically connected with the positive electrode of the second loudspeaker, the third end of the switch piece is electrically connected with the positive electrode of the output end of the power amplifier, and the fourth end of the switch piece is electrically connected with the negative electrode of the second loudspeaker;

The electronic equipment is in a first working state, the first end and the second end of the switch piece are conducted, the third end and the fourth end of the switch piece are conducted, the electronic equipment is in a second working state, the first end and the second end of the switch piece are disconnected, and the third end and the fourth end of the switch piece are disconnected.

5. The electronic device of claim 3 or 4, further comprising: the controller is electrically connected with the first loudspeaker through the sampling circuit to acquire the driving current or the driving voltage of the first loudspeaker; and/or

The controller is electrically connected with the second loudspeaker through the sampling circuit so as to acquire the driving current or the driving voltage of the second loudspeaker.

6. The electronic device of claim 5, wherein the controller is electrically connected to the power amplifier for outputting an audio signal to the power amplifier.

7. The electronic device of claim 6, wherein the controller is electrically connected to the switch for controlling an on-off state of the switch.

8. The electronic device according to claim 7, wherein after the controller switches the electronic device to the first operation state or the second operation state by controlling an on-off state of the switching element, the controller outputs an audio signal to the power amplifier, and the power amplifier outputs driving signals to the first speaker and the second speaker based on the audio signal.

9. The electronic device of claim 5, wherein the electronic device comprises a memory device,

the first sampling end of the controller is electrically connected with the anode of the first loudspeaker and is used for obtaining a first driving current of the first loudspeaker, and the controller is used for carrying out overcurrent and overvoltage protection on the first loudspeaker according to the first driving current;

the sampling circuit comprises a first resistor, a first end of the first resistor is electrically connected with the power amplifier, and a second end of the first resistor is electrically connected with the first loudspeaker;

the first sampling end of the controller comprises a first detection channel and a second detection channel, the first detection channel is electrically connected with the first end of the first resistor, the first detection channel is used for collecting a first voltage value, the second detection channel is electrically connected with the second end of the first resistor, and the second detection channel is used for collecting a second voltage value;

the controller is configured to determine a first drive current of the first speaker based on the first voltage value and the second voltage value.

10. The electronic device of claim 5, wherein the electronic device comprises a memory device,

the second sampling end of the controller is electrically connected with the anode of the second loudspeaker and is used for acquiring a second driving current of the second loudspeaker; the controller is used for carrying out overcurrent and overvoltage protection on the second loudspeaker according to the second driving current;

The sampling circuit comprises a second resistor, a first end of the second resistor is electrically connected with the switch piece, and a second end of the second resistor is electrically connected with the second loudspeaker;

the second sampling end of the controller comprises a third detection channel and a fourth detection channel, the third detection channel is electrically connected with the first end of the second resistor, the fourth detection channel is used for collecting a third voltage value, the fourth detection channel is electrically connected with the second end of the second resistor, and the fourth detection channel is used for collecting a fourth voltage value;

the controller is configured to determine a second drive current for the second speaker based on the third voltage value and the fourth voltage value.