CN108430004B - Loudspeaker amplitude adjusting device, adjusting method and mobile terminal - Google Patents
Loudspeaker amplitude adjusting device, adjusting method and mobile terminal Download PDFInfo
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- CN108430004B CN108430004B CN201810337784.5A CN201810337784A CN108430004B CN 108430004 B CN108430004 B CN 108430004B CN 201810337784 A CN201810337784 A CN 201810337784A CN 108430004 B CN108430004 B CN 108430004B
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- loudspeaker
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
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Abstract
The invention provides a loudspeaker amplitude adjusting device, a loudspeaker amplitude adjusting method and a mobile terminal, wherein the device comprises: the loudspeaker comprises a voice coil and an induction coil, the voice coil is electrically connected with the power amplifier, the induction coil is electrically connected with the control module, the inner wall of the voice coil is enclosed to form a first cavity, the inner wall of the induction coil is enclosed to form a second cavity, and the induction coil is arranged in the first cavity or the voice coil is arranged in the second cavity; the control module is used for acquiring voice coil current of the voice coil and induction current of the induction coil; and determining the amplitude of the loudspeaker according to the voice coil current and the induced current, and adjusting the current output to the power amplifier when the absolute value of the difference between the determined amplitude of the loudspeaker and the pre-stored design amplitude is greater than or equal to a preset threshold value. The invention can make the tone quality of the loudspeaker better.
Description
Technical Field
The invention relates to the technical field of loudspeakers, in particular to a loudspeaker amplitude adjusting device, a loudspeaker amplitude adjusting method and a mobile terminal.
Background
Along with the popularization of the mobile terminal and the development of the entertainment industry, people have higher and higher requirements on the tone quality experience of the mobile terminal, and the loudspeaker is used as the commonly used playing equipment of the mobile terminal, so that the tone quality of a sound file played by the loudspeaker directly influences the tone quality experience of a user.
The sound quality of a loudspeaker is influenced by the amplitude of the loudspeaker, i.e. the loudspeaker has a design amplitude, the better the sound quality of the loudspeaker is if the amplitude of the loudspeaker when playing a sound file is closer to the design amplitude. However, the amplitude of the current speaker usually deviates from the designed amplitude when playing the sound file, resulting in poor sound quality of the speaker.
Disclosure of Invention
The embodiment of the invention provides a loudspeaker amplitude adjusting device, a loudspeaker amplitude adjusting method and a mobile terminal, and aims to solve the problem that the amplitude of a conventional loudspeaker is usually deviated from the designed amplitude to a large extent when the loudspeaker plays a sound file, so that the tone quality of the loudspeaker is poor.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a loudspeaker amplitude adjustment apparatus, including:
the loudspeaker comprises a voice coil and an induction coil, wherein the voice coil is electrically connected with the power amplifier, the induction coil is electrically connected with the control module, the inner wall of the voice coil is enclosed to form a first cavity, the inner wall of the induction coil is enclosed to form a second cavity, and the induction coil is arranged in the first cavity or the voice coil is arranged in the second cavity;
the control module is used for acquiring a voice coil current of the voice coil and an induced current of the induction coil, wherein the induced current is a current generated by the change of a magnetic flux in the induction coil when the induction coil induces the voice coil to vibrate; and determining the amplitude of the loudspeaker according to the voice coil current and the induced current, and regulating the current output to the power amplifier when the absolute value of the difference between the determined amplitude of the loudspeaker and the pre-stored design amplitude is greater than or equal to a preset threshold value.
In a second aspect, an embodiment of the present invention further provides a speaker amplitude adjusting method, which is applied to the speaker amplitude adjusting apparatus, and includes:
acquiring a voice coil current of a voice coil of a loudspeaker and an induced current of an induction coil of the loudspeaker, wherein the induced current is a current generated by a change of a magnetic flux in the induction coil when the induction coil induces the voice coil to vibrate;
determining the amplitude of the loudspeaker according to the voice coil current and the induced current;
adjusting a current output to the power amplifier when an absolute value of a difference between the determined amplitude of the speaker and a pre-stored design amplitude is greater than or equal to a preset threshold.
In a third aspect, an embodiment of the present invention further provides a mobile terminal, including the speaker amplitude adjusting apparatus.
In a fourth aspect, an embodiment of the present invention further provides a mobile terminal, including a processor, a memory, and a computer program stored on the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the speaker amplitude adjusting method described above.
In a fifth aspect, the embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the steps of the speaker amplitude adjusting method described above.
In the embodiment of the invention, the control module acquires the current of the voice coil and the induced current, determines the amplitude of the loudspeaker according to the current, and adjusts the current output to the power amplifier when the absolute value of the difference between the determined amplitude of the loudspeaker and the pre-stored design amplitude is greater than or equal to the preset threshold, namely, the amplitude of the loudspeaker can be adjusted when the amplitude of the loudspeaker deviates from the design amplitude to a large extent, so that the real-time adjustment of the amplitude of the loudspeaker can be realized, and the tone quality of the loudspeaker can be better.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a structural diagram of a loudspeaker amplitude adjustment apparatus according to an embodiment of the present invention;
fig. 2 is a sectional view of a speaker in the speaker amplitude adjusting apparatus according to the embodiment of the present invention;
fig. 3 is a cross-sectional view of a top view of an induction coil and a voice coil when the induction coil is disposed in a first cavity of the voice coil in the loudspeaker amplitude adjustment apparatus according to an embodiment of the present invention;
fig. 4 is a cross-sectional view of a top view of a voice coil and an induction coil when the voice coil is disposed in a second cavity of the induction coil in the loudspeaker amplitude adjustment apparatus according to an embodiment of the present invention;
fig. 5 is a structural diagram of a flexible circuit board in a speaker in the speaker amplitude adjustment apparatus according to an embodiment of the present invention;
fig. 6 is a flowchart of a method for adjusting the amplitude of a speaker according to an embodiment of the present invention;
fig. 7 is a block diagram of a mobile terminal according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 4, a speaker amplitude adjusting apparatus includes:
the loudspeaker comprises a control module 1, a power amplifier 2 and a loudspeaker 3, wherein the control module 1 is electrically connected with the power amplifier 2, the loudspeaker 3 comprises a voice coil 301 and an induction coil 302, the voice coil 301 is electrically connected with the power amplifier 2, the induction coil 302 is electrically connected with the control module 1, the inner wall of the voice coil 301 is enclosed to form a first cavity, the inner wall of the induction coil 302 is enclosed to form a second cavity, and the induction coil 302 is arranged in the first cavity or the voice coil 301 is arranged in the second cavity;
the control module 1 is configured to obtain a voice coil current of the voice coil 301 and an induced current of the induction coil 302, where the induced current is a current generated by a change of a magnetic flux in the induction coil 302 when the induction coil 302 induces the voice coil 301 to vibrate; and determining the amplitude of the loudspeaker 3 according to the voice coil current and the induced current, and adjusting the current output to the power amplifier 2 when the absolute value of the difference between the determined amplitude of the loudspeaker 3 and the pre-stored design amplitude is greater than or equal to a preset threshold value.
The control module 1 may be an Integrated Circuit (IC), which may also be referred to as a chip. The power amplifier 2 may be a device for amplifying an electric signal (for example, current) output from the control module 1 and outputting the amplified electric signal to the voice coil 301 of the speaker 3. The voice coil current may be an alternating current output from the power amplifier 2 to the voice coil 301.
The axis of the voice coil 301 and the axis of the induction coil 302 may be parallel or coincident, or may form an acute angle.
Referring to fig. 3 and 4, when the induction coil 302 is disposed in the first cavity of the voice coil 301, a cross-sectional view of another view (top view) of the induction coil 302 and the voice coil 301 may be as shown in fig. 3, where the other view is the top view; when the voice coil 301 is disposed in the second cavity of the induction coil 302, the cross-sectional view of the induction coil 302 and the voice coil 301 from another perspective may be as shown in fig. 4, where the other perspective is a top view. In addition, as can be seen from fig. 4, when the voice coil 301 is disposed in the second cavity of the induction coil 302, the induction coil 302 may be disposed on the side magnet 304, for example, on the second magnetic conductive sheet 3042 of the side magnet 304, and the voice coil 301 may be disposed in the gap between the side magnet 304 and the central magnet 305.
The magnetic flux in the induction coil 302 may be a magnetic flux in a second cavity through the induction coil 302. The induced current is a current generated by a change of a magnetic flux in the induction coil 302 when the induction coil 302 induces the voice coil 301 to vibrate, and it can be understood that the magnetic flux passing through the induction coil 302 changes when the voice coil 301 vibrates (on one hand, the magnetic flux passing through the induction coil 302 changes due to a change of a relative position of the voice coil 301 and the induction coil 302 when the voice coil 301 vibrates, and on the other hand, the magnetic flux passing through the induction coil also changes due to a change of the voice coil current when the voice coil 301 vibrates), so that the induction coil 302 generates a corresponding induced current.
The determining of the amplitude of the speaker 3 based on the voice coil current and the induced current may be performed by determining the speaker amplitude corresponding to the voice coil current and the induced current based on a correspondence relationship among the voice coil current, the induced current, and the speaker amplitude stored in the control module 1 in advance. The pre-stored design amplitude can be pre-stored by a designer according to needs, and can also be determined by the control module 1 through calculation; the preset threshold may be a value greater than 0.
As mentioned above, when the absolute value of the difference between the determined amplitude of the speaker 3 and the pre-stored design amplitude is greater than or equal to the preset threshold, the current output to the power amplifier 2 is adjusted, it can be understood that, firstly, it is determined whether the absolute value of the difference between the determined amplitude of the speaker 3 and the pre-stored design amplitude is greater than or equal to the preset difference, and when it is determined that the absolute value of the difference between the determined amplitude of the speaker 3 and the pre-stored design amplitude is greater than or equal to the preset difference, the current output to the power amplifier 2 is correspondingly increased or decreased according to the magnitude relationship between the determined amplitude of the speaker 3 and the pre-stored design amplitude and the difference therebetween, so as to achieve the purpose of adjusting the voice coil current, and further achieve the purpose of adjusting the amplitude of the speaker 3 in real time.
In the embodiment of the invention, the control module acquires the current of the voice coil and the induced current, determines the amplitude of the loudspeaker according to the current, and adjusts the current output to the power amplifier when the absolute value of the difference between the determined amplitude of the loudspeaker and the pre-stored design amplitude is greater than or equal to the preset threshold, namely, the amplitude of the loudspeaker can be adjusted when the amplitude of the loudspeaker deviates from the design amplitude to a large extent, so that the real-time adjustment of the amplitude of the loudspeaker can be realized, and the tone quality of the loudspeaker can be better.
The speaker amplitude adjusting apparatus in the embodiment of the present invention may be applied to Mobile terminals such as a Mobile phone, a tablet personal Computer (tablet personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), or a Wearable Device (Wearable Device).
Optionally, the speaker 3 further includes: the magnetic field component comprises a diaphragm 303 and a magnetic field component used for generating a fixed magnetic field, wherein the magnetic field component comprises a side magnet 304 and a central magnet 305, the side magnet 304 is arranged at the periphery of the central magnet 305, the voice coil 301 is arranged between the side magnet 304 and the central magnet 305, and the voice coil 301 is fixedly connected with the diaphragm 303.
Here, the diaphragm 303 may be a member that vibrates to generate sound following the vibration of the voice coil 301 when the voice coil 301 vibrates. The side magnets 304 are arranged around the center magnet 305 to form a magnetic loop between the center magnet 305 and the side magnets 304; the axes of the center magnet 305 and the side magnets 304 may be parallel or coincident.
The voice coil 301 is disposed between the side magnet 304 and the center magnet 305, which may mean that the voice coil 301 is disposed in a gap between the side magnet 304 and the center magnet 305. The voice coil 301 is disposed between the side magnet 304 and the central magnet 305, and may be configured to enable the voice coil 301 to be in a magnetic loop formed by the side magnet 304 and the central magnet 305, so that when an alternating signal current flows through the voice coil 301, the voice coil 301 is vibrated by an ampere force, and the diaphragm 303 is driven to vibrate, thereby pushing air to propagate sound waves.
Optionally, the magnetic field component further includes a magnetic steel 306, the central magnet 305 includes a central magnet 3051 and a first magnetic conductive sheet 3052, an end surface of one end of the central magnet 3051 is fixed to the middle of the magnetic steel 306, an end surface of the other end of the central magnet 3051 is provided with the first magnetic conductive sheet 3052, the edge magnet 304 includes an edge magnet 3041 and a second magnetic conductive sheet 3042, an end surface of one end of the edge magnet 3041 is fixed to an edge of the magnetic steel 306, and an end surface of the other end of the edge magnet 3041 is provided with the second magnetic conductive sheet 3042.
The magnetic steel 306, the first magnetic conductive plate 3052, and the second magnetic conductive plate 3042 may be components for conducting and uniformly transmitting magnetic induction lines. The edge magnets 3041 may be ring magnets, or may include N (N is an integer greater than or equal to 2) magnets arranged around the center magnet 3051; the second magnetic conductive plate 3042 may be an annular magnetic conductive plate.
Like this, owing to be equipped with magnet steel and first magnetic conductive plate respectively at the both ends of center magnetite, and be equipped with magnet steel and second magnetic conductive plate respectively at the both ends of limit magnetite, therefore can conduct magnetism induction line better, make the magnetic circuit that center magnetite and limit magnetite formed more even, and then make the tone quality of speaker better.
Optionally, the induction coil 302 is disposed in the first cavity, and the induction coil 302 is fixed to the first magnetically permeable piece 3052.
The induction coil 302 is fixed on the first magnetic conductive sheet 3052, and the induction coil 302 may be glued and bonded on the first magnetic conductive sheet 3052.
Therefore, the induction coil is fixed on the first magnetic conduction sheet, the structure is simpler, the manufacture and the assembly of the loudspeaker are more convenient, and the cost is lower.
Optionally, the speaker 3 further includes a dome 307, and the dome 307 is disposed on the diaphragm 303.
The dome 307 may be a member for increasing the strength of the diaphragm 303.
Like this, because be provided with the dome on the diaphragm to can improve the intensity of diaphragm in order to increase the stability of speaker, and then can make the tone quality of speaker better.
Optionally, the speaker 3 further includes a Flexible Circuit board 308 (FPC for short), the voice coil 301 is electrically connected to the power amplifier 2 through the Flexible Circuit board 308, and the induction coil 302 is connected to the control module 1 through the Flexible Circuit board 308.
The structure of the flexible circuit board 308 may be as shown in fig. 5, that is, the flexible circuit board includes a voice coil bonding pad 3081 (two voice coil bonding pads 3081 in the figure correspond to positive and negative electrodes, respectively), a voice coil lead bonding pad 3082, an induction coil bonding pad 3083 (two induction coil bonding pads 3083 in the figure correspond to positive and negative electrodes, respectively), and an induction coil lead bonding pad 3084; the voice coil bonding pad 3081 and the voice coil lead bonding pad 3082 are mutually conducted, the voice coil bonding pad 3081 is used for being electrically connected with the power amplifier 2, the voice coil lead bonding pad 3082 is used for being electrically connected with the voice coil 301, the induction coil bonding pad 3083 is mutually conducted with the induction coil lead bonding pad 3084, the induction coil bonding pad 3083 is used for being electrically connected with the control module 1, and the induction coil lead bonding pad 3084 is used for being electrically connected with the induction coil 302. Thus, when the structure of the flexible circuit board 308 adopts the structure shown in fig. 3, the electrical signal output by the power amplifier 2 sequentially passes through the voice coil bonding pad 3081 and the voice coil lead bonding pad 3082, and finally enters the voice coil 301 for power supply; the electric signal fed back by the induction coil 302 passes through the induction coil lead bonding pad 3084 and the induction coil bonding pad 3083 in sequence, and is finally transmitted to the control module 1.
Therefore, the flexible circuit board has the characteristics of high wiring density, light weight, thin thickness, good bending property and the like, so that the flexible circuit board is adopted to realize the electric connection among all the parts, and the loudspeaker amplitude adjusting device in the embodiment of the invention has the advantages of higher wiring density, lighter weight, smaller volume and more convenient assembly.
Optionally, the flexible circuit board 308 is fixed to the side magnet 304, and the voice coil 301 is fixedly connected to the diaphragm 303 through the flexible circuit board 308.
As shown in fig. 2, the flexible circuit board 308 is fixed to the side magnet 304, or the flexible circuit board 308 is fixed to the second magnetic conductive sheet 3042 of the side magnet 304 through the bracket 309 fixed to the side magnet 304, specifically, one end of the bracket 309 is connected to the second magnetic conductive sheet 3042 of the side magnet 304, and the other end of the bracket 309 is connected to the flexible circuit board 308.
As shown in fig. 6, a loudspeaker amplitude adjusting method applied to the loudspeaker amplitude adjusting apparatus according to each embodiment of the foregoing embodiments includes:
For the control module, the power amplifier, the magnetic flux in the induction coil, the induced current, the voice coil current, the preset threshold, and the specific structure of the speaker, when the absolute value of the difference between the determined amplitude of the speaker and the pre-stored design amplitude is greater than or equal to the preset threshold, the current output to the power amplifier and the specific structure of the speaker may be adjusted according to the corresponding descriptions in the embodiments of fig. 1 to 5, and thus the description is omitted here.
According to the loudspeaker amplitude adjusting method in the embodiment of the invention, the voice coil current and the induced current are obtained, the amplitude of the loudspeaker is determined according to the voice coil current and the induced current, and then the current output to the power amplifier is adjusted when the absolute value of the difference between the determined amplitude of the loudspeaker and the pre-stored design amplitude is greater than or equal to the preset threshold value, namely, the amplitude of the loudspeaker can be adjusted when the amplitude of the loudspeaker deviates from the design amplitude to a large extent, so that the real-time adjustment of the amplitude of the loudspeaker can be realized, and the tone quality of the loudspeaker can be better.
The method for adjusting the amplitude of the speaker in the embodiment of the present invention may be applied to Mobile terminals such as a Mobile phone, a tablet personal Computer (tablet personal Computer), a Laptop Computer (Laptop Computer), a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), or a Wearable Device (Wearable Device).
Optionally, before the step of determining the amplitude of the speaker according to the voice coil current and the induced current, the method further includes:
storing the corresponding relation among the current of the voice coil, the induced current and the amplitude of the loudspeaker;
determining an amplitude of the speaker based on the voice coil current and the induced current, comprising:
and determining the loudspeaker amplitude corresponding to the acquired voice coil current and the acquired induction current according to the corresponding relation among the pre-stored voice coil current, induction current and loudspeaker amplitude.
Therefore, the corresponding relation among the voice coil current, the induced current and the loudspeaker amplitude is stored in advance, so that the loudspeaker amplitude can be determined directly through the pre-stored corresponding relation after the voice coil current and the induced current are obtained, the loudspeaker amplitude can be determined more quickly, the adjusting speed of the loudspeaker amplitude can be further improved, and the adjusting real-time performance is better.
It should be noted that the main body of execution of each step of the speaker amplitude adjusting method in each embodiment of the present invention may be the control module in the speaker amplitude adjusting apparatus described in the above embodiment.
An embodiment of the present invention further provides a mobile terminal, including the speaker amplitude adjusting apparatus described in each implementation in the foregoing embodiments.
The mobile terminal in the embodiment of the invention comprises the loudspeaker amplitude adjusting device in each embodiment of the embodiment, so that the amplitude of the loudspeaker can be adjusted when the amplitude of the loudspeaker deviates from the designed amplitude to a large extent, the amplitude of the loudspeaker can be adjusted in real time, and the sound quality of the loudspeaker can be better.
Fig. 7 is a schematic diagram of a hardware structure of a mobile terminal for implementing various embodiments of the present invention, where the mobile terminal 700 includes but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, a processor 710, a power supply 711, and the like. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 7 is not intended to be limiting of mobile terminals, and that a mobile terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the mobile terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.
Wherein the processor 710 is configured to:
acquiring a voice coil current of a voice coil of a loudspeaker and an induced current of an induction coil of the loudspeaker, wherein the induced current is a current generated by a change of a magnetic flux in the induction coil when the induction coil induces the voice coil to vibrate;
determining the amplitude of the loudspeaker according to the voice coil current and the induced current;
adjusting a current output to the power amplifier when an absolute value of a difference between the determined amplitude of the speaker and a pre-stored design amplitude is greater than or equal to a preset threshold.
Optionally, the processor 710 is further configured to:
storing the corresponding relation among the current of the voice coil, the induced current and the amplitude of the loudspeaker;
the step of determining the amplitude of the speaker from the voice coil current and the induced current performed by processor 710 includes:
and determining the loudspeaker amplitude corresponding to the acquired voice coil current and the acquired induction current according to the corresponding relation among the pre-stored voice coil current, induction current and loudspeaker amplitude.
The mobile terminal 700 can implement the processes implemented by the speaker amplitude adjustment apparatus in the foregoing embodiments, and for avoiding repetition, the details are not described here.
According to the mobile terminal 700 of the embodiment of the present invention, since the voice coil current and the induced current are obtained, the amplitude of the speaker is determined according to the obtained current, and then the current output to the power amplifier is adjusted when the absolute value of the difference between the determined amplitude of the speaker and the pre-stored design amplitude is greater than or equal to the preset threshold, that is, since the amplitude of the speaker can be adjusted when the amplitude of the speaker deviates from the design amplitude to a large extent, the real-time adjustment of the amplitude of the speaker can be achieved, and the sound quality of the speaker can be better.
It should be understood that, in the embodiment of the present invention, the radio frequency unit 701 may be used for receiving and sending signals during a message transmission and reception process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 710; in addition, the uplink data is transmitted to the base station. In general, radio frequency unit 701 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 701 may also communicate with a network and other devices through a wireless communication system.
The mobile terminal provides the user with wireless broadband internet access via the network module 702, such as helping the user send and receive e-mails, browse web pages, and access streaming media.
The audio output unit 703 may convert audio data received by the radio frequency unit 701 or the network module 702 or stored in the memory 709 into an audio signal and output as sound. Also, the audio output unit 703 may also provide audio output related to a specific function performed by the mobile terminal 700 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 703 includes a speaker, a buzzer, a receiver, and the like.
The input unit 704 is used to receive audio or video signals. The input Unit 704 may include a Graphics Processing Unit (GPU) 7041 and a microphone 7042, and the Graphics processor 7041 processes image data of a still picture or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 706. The image frames processed by the graphic processor 7041 may be stored in the memory 709 (or other storage medium) or transmitted via the radio unit 701 or the network module 702. The microphone 7042 may receive sounds and may be capable of processing such sounds into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 701 in case of a phone call mode.
The mobile terminal 700 also includes at least one sensor 705, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 7061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 7061 and/or a backlight when the mobile terminal 700 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the posture of the mobile terminal (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), and vibration identification related functions (such as pedometer, tapping); the sensors 705 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.
The display unit 706 is used to display information input by the user or information provided to the user. The Display unit 706 may include a Display panel 7061, and the Display panel 7061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 707 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. Specifically, the user input unit 707 includes a touch panel 7071 and other input devices 7072. The touch panel 7071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 7071 (e.g., operations by a user on or near the touch panel 7071 using a finger, a stylus, or any other suitable object or attachment). The touch panel 7071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 710, receives a command from the processor 710, and executes the command. In addition, the touch panel 7071 can be implemented by various types such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 707 may include other input devices 7072 in addition to the touch panel 7071. In particular, the other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described herein again.
Further, the touch panel 7071 may be overlaid on the display panel 7061, and when the touch panel 7071 detects a touch operation on or near the touch panel 7071, the touch operation is transmitted to the processor 710 to determine the type of the touch event, and then the processor 710 provides a corresponding visual output on the display panel 7061 according to the type of the touch event. Although the touch panel 7071 and the display panel 7061 are shown in fig. 7 as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 7071 and the display panel 7061 may be integrated to implement the input and output functions of the mobile terminal, which is not limited herein.
The interface unit 708 is an interface through which an external device is connected to the mobile terminal 700. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 708 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the mobile terminal 700 or may be used to transmit data between the mobile terminal 700 and external devices.
The memory 709 may be used to store software programs as well as various data. The memory 709 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 709 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 710 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 709 and calling data stored in the memory 709, thereby integrally monitoring the mobile terminal. Processor 710 may include one or more processing units; preferably, the processor 710 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 710.
The mobile terminal 700 may also include a power supply 711 (e.g., a battery) for powering the various components, and the power supply 711 may be logically coupled to the processor 710 via a power management system that may enable managing charging, discharging, and power consumption by the power management system.
In addition, the mobile terminal 700 includes some functional modules that are not shown, and thus will not be described in detail herein.
Preferably, an embodiment of the present invention further provides a mobile terminal, including a processor 710, a memory 709, and a computer program stored in the memory 709 and capable of running on the processor 710, where the computer program is executed by the processor 710 to implement each process of the above-mentioned speaker amplitude adjusting method embodiment, and can achieve the same technical effect, and in order to avoid repetition, the details are not described here again.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the above-mentioned loudspeaker amplitude adjustment method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A loudspeaker amplitude adjustment apparatus, comprising:
the loudspeaker comprises a voice coil and an induction coil, wherein the voice coil is electrically connected with the power amplifier, the induction coil is electrically connected with the control module, the inner wall of the voice coil is enclosed to form a first cavity, the inner wall of the induction coil is enclosed to form a second cavity, and the induction coil is arranged in the first cavity;
the control module is used for acquiring a voice coil current of the voice coil and an induced current of the induction coil, wherein the induced current is a current generated by the change of a magnetic flux in the induction coil when the induction coil induces the voice coil to vibrate; determining an amplitude of the speaker according to the voice coil current and the induced current, and adjusting a current output to the power amplifier when an absolute value of a difference between the determined amplitude of the speaker and a pre-stored design amplitude is greater than or equal to a preset threshold value,
the loudspeaker also comprises a magnetic field component used for generating a fixed magnetic field, the magnetic field component comprises a side magnet and a central magnet, the side magnet is arranged around the central magnet, the voice coil is arranged between the side magnet and the central magnet, the induction coil is arranged at the top end of the central magnet,
the loudspeaker further comprises a flexible circuit board, the voice coil is electrically connected with the power amplifier through the flexible circuit board, the induction coil is connected with the control module through the flexible circuit board, the flexible circuit board is fixed on the side magnet, and one part of the flexible circuit board extends into the first cavity to be connected with the induction coil.
2. The speaker amplitude modulation device according to claim 1, wherein the speaker further comprises: the diaphragm, just the voice coil loudspeaker voice coil with diaphragm fixed connection.
3. The amplitude adjusting device of claim 2, wherein the magnetic field component further comprises a magnetic steel, the central magnet comprises a central magnet and a first magnetic conductive sheet, an end face of one end of the central magnet is fixed to the middle of the magnetic steel, an end face of the other end of the central magnet is provided with the first magnetic conductive sheet, the edge magnet comprises an edge magnet and a second magnetic conductive sheet, an end face of one end of the edge magnet is fixed to an edge of the magnetic steel, and an end face of the other end of the edge magnet is provided with the second magnetic conductive sheet.
4. The amplitude modulation device of claim 3, wherein the induction coil is disposed in the first cavity, and the induction coil is fixed to the first magnetic conductive sheet.
5. The loudspeaker amplitude modulation device of claim 2, wherein the loudspeaker further comprises a dome disposed on the diaphragm.
6. The loudspeaker amplitude modulation device of claim 2, wherein the voice coil is fixedly connected to the diaphragm through the flexible circuit board.
7. A loudspeaker amplitude adjustment method applied to the loudspeaker amplitude adjustment apparatus according to any one of claims 1 to 6, characterized by comprising:
acquiring a voice coil current of a voice coil of a loudspeaker and an induced current of an induction coil of the loudspeaker, wherein the induced current is a current generated by a change of a magnetic flux in the induction coil when the induction coil induces the voice coil to vibrate;
determining the amplitude of the loudspeaker according to the voice coil current and the induced current;
adjusting a current output to the power amplifier when an absolute value of a difference between the determined amplitude of the speaker and a pre-stored design amplitude is greater than or equal to a preset threshold.
8. A mobile terminal characterized by comprising the speaker amplitude adjustment apparatus according to any one of claims 1 to 6.
9. A mobile terminal, characterized in that it comprises a processor, a memory and a computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the loudspeaker amplitude adjustment method according to claim 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810337784.5A CN108430004B (en) | 2018-04-16 | 2018-04-16 | Loudspeaker amplitude adjusting device, adjusting method and mobile terminal |
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| CN201810337784.5A CN108430004B (en) | 2018-04-16 | 2018-04-16 | Loudspeaker amplitude adjusting device, adjusting method and mobile terminal |
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| CN108430004A CN108430004A (en) | 2018-08-21 |
| CN108430004B true CN108430004B (en) | 2020-09-25 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270352B (en) * | 2018-08-23 | 2021-08-10 | 维沃移动通信有限公司 | Amplitude adjusting method and sound generating device |
| CN112752205B (en) * | 2019-10-31 | 2022-04-29 | 华为技术有限公司 | Loudspeaker and adjusting method thereof |
| CN112235700B (en) * | 2020-10-30 | 2022-05-17 | Oppo广东移动通信有限公司 | Amplitude adjustment method for electroacoustic device, terminal device and readable storage medium |
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