CN215300846U

CN215300846U - Loudspeaker module and mobile terminal of digital interface

Info

Publication number: CN215300846U
Application number: CN202121419071.7U
Authority: CN
Inventors: 文斌
Original assignee: Xi'an Kusai Technology Co ltd
Current assignee: Sichuan Kubi Communication Equipment Co.,Ltd.
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2021-12-24
Anticipated expiration: 2031-06-25

Abstract

The utility model discloses a loudspeaker module and a mobile terminal of a digital interface, the loudspeaker module is connected with a loudspeaker body and a circuit board, the circuit board is fixed on the lower cover of the shell, and the circuit board is provided with a first digital interface, a spring plate and a control circuit, wherein the spring plate is matched with the number of pins of the loudspeaker body; the first digital interface is connected with the control circuit, the pins of the loudspeaker body are abutted against the elastic sheets in a one-to-one manner, and the control circuit is electrically connected with the loudspeaker body through the elastic sheets; the first digital interface transmits the input digital audio signal to the control circuit; the control circuit carries out sound effect processing, digital-to-analog conversion and power amplification on the digital audio signal according to the preset sound effect parameters, then outputs the simulated audio signal, and transmits the simulated audio signal to the loudspeaker body through the elastic sheet for playing. The digital interface has small interference on audio signal transmission, ensures the quality of audio, and solves the problem that the sound quality is influenced by the interference of the analog interface of the existing loudspeaker.

Description

Loudspeaker module and mobile terminal of digital interface

Technical Field

The utility model relates to a loudspeaker technical field especially relates to a digital interface's loudspeaker module and mobile terminal.

Background

In the conventional mobile terminal, as shown in fig. 1 (only the structure related to the speaker is shown here, and other structures are prior art, and will not be described in detail here), the speaker unit 1 of the speaker is usually placed on the lower cover 2, a large blank area of the lower cover 2 is used as a cavity rear cover 3 of the speaker, and the speaker unit 1 of the speaker is connected to a main board of the mobile terminal through an FPC (flexible circuit board) 4. Referring to fig. 2 (only the structure related to audio signal transmission is shown here), the Power Amplifier (PA) of the speaker is disposed on the main board, and the main board performs sound effect processing and power amplification on the audio signal, and then outputs an analog audio signal to the speaker unit 1 for playing. Because the interface of the horn unit 1 is an analog interface and is provided with a positive electrode and a negative electrode, the analog interface is greatly interfered, and the quality of audio frequency can be influenced. Simultaneously, because mobile terminal's type is different, the structure of lower cover 2 also can correspond the adjustment, and every type all need the mould sinking again and reserve the position of lid 3 behind the cavity for loudspeaker, and the shape of lid 3 can influence the broadcast effect of audio frequency behind the cavity, consequently need debug the audio of loudspeaker again, leads to the development cycle to lengthen.

Thus, the prior art has yet to be improved and enhanced.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned prior art's weak point, the utility model aims to provide a digital interface's loudspeaker module and mobile terminal to the simulation interface of solving current loudspeaker is disturbed the problem that can influence tone quality.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a horn module with a digital interface is installed in a shell of a mobile terminal, wherein the horn module is connected with the shell and comprises a horn body and a circuit board, the circuit board is fixed on a lower cover of the shell, and the circuit board is provided with a first digital interface, elastic sheets and a control circuit, wherein the number of the elastic sheets is matched with that of pins of the horn body;

the first digital interface is connected with the control circuit, the pins of the loudspeaker body are abutted against the elastic sheets in a one-to-one manner, and the control circuit is electrically connected with the loudspeaker body through the elastic sheets;

the first digital interface transmits the input digital audio signal to the control circuit; the control circuit carries out sound effect processing, digital-to-analog conversion and power amplification on the digital audio signal according to the preset sound effect parameters, then outputs the simulated audio signal, and transmits the simulated audio signal to the loudspeaker body through the elastic sheet for playing.

In the loudspeaker module of the digital interface, 2 elastic sheets are arranged on the left and right vertex angles of the circuit board.

In the loudspeaker module of the digital interface, the circuit board is arranged as a cavity rear cover of the loudspeaker module.

In the horn module of the digital interface, the control circuit comprises a DSP chip, a power amplifier and a digital-to-analog converter; the DSP chip is connected with the first digital interface and the power amplifier, and the digital-to-analog converter is connected with the power amplifier and the elastic sheet;

the DSP chip stores pre-debugged sound effect parameters and performs sound effect processing on digital audio signals according to the sound effect parameters;

the digital-to-analog converter performs digital-to-analog conversion on the audio signal subjected to the sound effect processing and outputs an analog audio signal;

the power amplifier amplifies the power of the analog audio signal and transmits the amplified signal to the elastic sheet.

A mobile terminal comprises a shell, wherein a main board, an FPC board and a loudspeaker module are arranged in the shell; the main board is electrically connected with one end of the FPC board, and a second digital interface at the other end of the FPC board is electrically connected with a first digital interface of the horn module;

the mainboard outputs digital audio signals and transmits the digital audio signals to the loudspeaker module through the FPC board, and the loudspeaker module carries out sound effect processing, digital-to-analog conversion and power amplifier back playing on the digital audio signals according to preset sound effect parameters.

In the mobile terminal, the mobile terminal is a mobile phone, a tablet computer, a notebook computer or a game machine.

Compared with the prior art, the utility model provides a digital interface's loudspeaker module and mobile terminal, loudspeaker module connects including loudspeaker body and circuit board, the circuit board is fixed on the lower cover of casing, be equipped with first digital interface, with the shell fragment and the control circuit of the pin number adaptation of loudspeaker body on the circuit board; the first digital interface is connected with the control circuit, the pins of the loudspeaker body are abutted against the elastic sheets in a one-to-one manner, and the control circuit is electrically connected with the loudspeaker body through the elastic sheets; the first digital interface transmits the input digital audio signal to the control circuit; the control circuit carries out sound effect processing, digital-to-analog conversion and power amplification on the digital audio signal according to the preset sound effect parameters, then outputs the simulated audio signal, and transmits the simulated audio signal to the loudspeaker body through the elastic sheet for playing. The audio signal is transmitted through the digital interface, the quality of audio is ensured because the digital interface is little interfered, and the problem that the tone quality is influenced by the interference of the analog interface of the existing loudspeaker is solved. With audio processing, power amplifier and digital-to-analog conversion function integration in loudspeaker module, make loudspeaker module independently be a whole, need not the rethread mainboard and carry out the audio processing, can satisfy different grade type mobile terminal's loudspeaker design demand, improved loudspeaker module's compatibility.

Drawings

Fig. 1 is a schematic diagram of a conventional mobile terminal.

Fig. 2 is a block diagram of a conventional mobile terminal.

Fig. 3 is a schematic diagram of a mobile terminal provided by the present invention.

Fig. 4 is a block diagram of a mobile terminal according to the present invention.

Detailed Description

The utility model provides a digital interface's loudspeaker module and mobile terminal. In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 3 and fig. 4, the mobile terminal provided by the present invention includes a housing, wherein a main board 10, an FPC board 20, and a speaker module 30 are disposed in the housing; the main board 10 is electrically connected to one end of the FPC board 20 (specifically, a fourth digital interface for outputting digital audio signals on the main board 10 is connected to a third digital interface 22 at one end of the FPC board 20), and a second digital interface 21 at the other end of the FPC board 20 is electrically connected to a first digital interface 33 of the speaker module 30. The mainboard 10 outputs digital audio signals and transmits the audio signals to the horn module 30 through the FPC board 20, and the horn module 30 calls preset sound effect parameters to perform sound effect processing, digital-to-analog conversion and power amplification on the digital audio signals and then plays the digital audio signals.

The mobile terminal can be an electronic product such as a mobile phone, a tablet computer, a notebook computer, a game machine and the like which is provided with a loudspeaker for playing audio. In the embodiment, the analog interface of the existing loudspeaker and the analog interface on the FPC board are replaced by the digital interface, and the digital interface is subjected to small interference, so that the interference during audio signal transmission is small, and the quality of audio is ensured; simultaneously, the function integration of handling power amplifier and audio is in loudspeaker module, independently is a whole with loudspeaker module, need not the rethread mainboard and carries out the audio and handle, debugs the audio parameter of loudspeaker module alone according to the demand in advance, can satisfy different grade type mobile terminal's loudspeaker design demand, has improved loudspeaker module's compatibility.

In this embodiment, the horn module 30 includes a horn body 31 and a circuit board 32 (i.e., a PCB), the circuit board 32 is configured as a cavity rear cover of the horn module 30 and is fixed on the lower cover 40 of the housing, and the circuit board 32 is provided with the first digital interface 33, the 2 elastic sheets 34 and the control circuit 35; the first digital interface 33 is connected with the control circuit 35 and the second digital interface 21 at the other end of the

FPC board

20, 2 pins of the horn body 31 are abutted with 2 elastic pieces one to one (the pins press the elastic pieces), and the control circuit 35 is electrically connected with the horn body 31 through the elastic pieces 34.

The FPC board 20 outputs digital audio signals from the second digital interface and transmits the digital audio signals to the control circuit 35 through the first digital interface 33; the control circuit 35 calls preset sound effect parameters to perform sound effect processing, digital-to-analog conversion and power amplification on digital audio signals and then outputs analog audio signals, the analog amplified audio signals are transmitted to the 2 elastic pieces 34 through wiring on the circuit board 32, and then the analog amplified audio signals are transmitted to the loudspeaker body 31 to be played.

In the present embodiment, the speaker module 30 is modularized, and the circuit board 32 is used as a rear cover of the cavity of the speaker module 30, so that the layout space of the whole device can be reduced. The circuit unit of putting the power amplifier of current setting on the mainboard and signal processing puts in loudspeaker module, and the mainboard only needs output digital audio signal, carries out by loudspeaker module to audio signal's various processings, and loudspeaker module can independently come out like this, can compatible different equipment.

In this embodiment, a DSP (digital signal processing) chip (or a corresponding peripheral circuit) is disposed in the control circuit 35, the DSP chip stores preset sound effect parameters, and the DSP chip calls the preset sound effect parameters to perform sound effect processing on digital audio signals; a Digital-to-analog converter (DAC) is arranged to carry out Digital-to-analog conversion on the audio signal after the sound effect processing and output an analog audio signal; a Power Amplifier (PA) is arranged to amplify the power of the analog audio signal and transmit the amplified signal to the elastic sheet. The specific circuit structures and connection relations of the DSP, the PA and the DAC are all the prior art, and these devices are only removed from the main board and integrated on the circuit board of the horn module.

During specific implementation, a horn manufacturer can design the shape of the adaptive cavity rear cover according to the shapes of the lower covers of different types of mobile terminals, the horn module corresponding to the cavity rear cover with each shape is independently debugged until the performance is adjusted to be optimal, and the current audio parameters are stored; the cavity rear cover with one shape corresponds to a group of audio parameters, and the numerical values of the audio parameters are matched with the shape of the cavity rear cover, so that the loudspeaker modules of the cavity rear covers with different shapes have the most suitable audio parameters; after debugging is completed, during subsequent use, corresponding audio parameters can be selected according to the shape of the rear cover of the cavity and stored in the DSP chip, the sound effect of the loudspeaker does not need to be debugged again, and the development period is shortened.

It should be understood that, since the horn body 31 has only one positive pin and one negative pin, the present embodiment is provided with 2 elastic pieces 34, as shown in fig. 3, which can be disposed on the left and right vertex angles of the circuit board 32, and the specific positions correspond to the pins of the horn body; if the number and the position of the pins of the loudspeaker body are changed, the number and the position of the elastic sheets are correspondingly changed. The Power Amplifier (PA) may be placed at the position a shown in fig. 3, or at other positions on the circuit board 32, where the position a is merely an example, and the specific position may be set according to the power amplifier requirement. The first digital interface 33 can be placed beside the power amplifier or beside the DSP chip to shorten the transmission path of the audio signal and further reduce the interference; preferably, the PA is arranged around the power amplifier, the PA is close to the horn, the path of the analog signal is short, and not only the interference is small, but also the path impedance of the horn is small. The position of the first digital interface 33 on the circuit board may also be set according to the shape of the FPC board 20 and the position of the second digital interface 21.

To sum up, the utility model discloses a digital interface's loudspeaker module and mobile terminal modularize current loudspeaker to integrated function circuits such as DSP (transfer the audio parameter and carry out audio processing), PA (power amplifier), DAC (digital-to-analog conversion) on the circuit board in this loudspeaker module, adopt digital interface to transmit audio signal, the external interference that receives is little, has ensured the quality of audio; the circuit board is used as a cavity rear cover of the loudspeaker module and has high integration level, so that the structural space is greatly reduced; the loudspeaker modules of the cavity rear covers with different shapes store the most adaptive audio parameters which are debugged in advance, and various types of mobile terminals can select the loudspeaker modules of the cavity rear covers with corresponding shapes according to the size of the area on the lower cover without debugging again, so that the die sinking cost is reduced, and the development period and the debugging period are shortened.

It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims

1. A horn module with a digital interface is installed in a shell of a mobile terminal and is characterized in that the horn module is connected with the shell and comprises a horn body and a circuit board, the circuit board is fixed on a lower cover of the shell, and the circuit board is provided with a first digital interface, elastic sheets and a control circuit, wherein the number of the elastic sheets is matched with that of pins of the horn body;

2. The speaker module of digital interface as claimed in claim 1, wherein the number of the elastic pieces is 2, and the elastic pieces are disposed on the left and right top corners of the circuit board.

3. The horn module of claim 1, wherein the circuit board is configured as a cavity back cover of the horn module.

4. The speaker module of digital interface of claim 1, wherein the control circuit comprises a DSP chip, a power amplifier and a digital-to-analog converter; the DSP chip is connected with the first digital interface and the power amplifier, and the digital-to-analog converter is connected with the power amplifier and the elastic sheet;

5. A mobile terminal comprising a housing, wherein the housing is provided with a main board, an FPC board and a speaker module as claimed in any one of claims 1 to 4; the main board is electrically connected with one end of the FPC board, and a second digital interface at the other end of the FPC board is electrically connected with a first digital interface of the horn module;

6. The mobile terminal of claim 5, wherein the mobile terminal is a mobile phone, a tablet computer, a notebook computer or a game console.