CN218499265U - Loudspeaker drive module and on-vehicle multimedia system - Google Patents

Abstract

The application discloses drive module and on-vehicle hypersystem of raising one's voice, wherein, the drive module of raising one's voice includes: the signal input ends are respectively used for accessing audio signals in different directions on the car machine module, and the different directions comprise front left, front right, back left and back right; the frequency dividing elements are connected with the signal input ends in a one-to-one correspondence manner, each frequency dividing element comprises a first output end and a first input end connected with the signal input end, and the first output end is used for being connected with at least one of a woofer, a middle-pitch loudspeaker and a high-pitch loudspeaker; the equalizer comprises second input ends which are connected with the signal input ends in a one-to-one correspondence mode and second output ends which are connected with different directions in a one-to-one correspondence mode, and the second output ends corresponding to the rear left side and the rear right side are all used for being connected with the subwoofer; a plurality of signal output terminals. Above-mentioned scheme is favorable to improving the tone quality effect of whole car, and has promoted the convenience of replacement speaker.

Description

Loudspeaker drive module and on-vehicle multimedia system

Technical Field

The application relates to the technical field of audio electronics, in particular to a loud-speaking driving module and a vehicle-mounted multimedia system.

Background

In daily life, especially in car audio scenes, the application of speaker drivers is becoming more widespread. Taking a car audio as an example, a part of speaker units are usually arranged in the area of a door panel of an automobile to provide a user with a hearing enjoying service.

The tone quality effect of the existing vehicle-mounted sound equipment can not meet the user requirement, the tone quality effect of the whole vehicle is poor, and if the requirement for replacing the loudspeaker exists, a specific loudspeaker with a corresponding frequency division element (such as a frequency division capacitor) needs to be searched, so that the convenience degree of replacement is reduced. Therefore, how to improve the existing speaker driving module to improve the sound quality effect of the car audio and the convenience of replacing the speaker becomes a problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The application provides a drive module and on-vehicle hypersystem of raising one's voice at least, can promote the tone quality effect of on-vehicle stereo set and the degree of convenience of replacement speaker.

The application provides a loudspeaker drive module in a first aspect, includes: the system comprises a plurality of signal input ends, a plurality of frequency dividing elements, an equalizer and a plurality of signal output ends, wherein the signal input ends are respectively used for accessing audio signals in different directions on the car machine module, and the different directions comprise front left, front right, back left and back right; the frequency dividing elements are connected with the signal input ends in a one-to-one correspondence mode, each frequency dividing element comprises a first output end and a first input end connected with the signal input ends, and the first output end is used for being connected with at least one of a woofer, a middle-range loudspeaker and a high-range loudspeaker; the equalizer comprises second input ends which are connected with the signal input ends in a one-to-one correspondence mode and second output ends which are connected with different directions in a one-to-one correspondence mode, and the second output ends corresponding to the rear left side and the rear right side are all used for being connected with the subwoofer; and a plurality of signal output terminals including first output terminals of the plurality of frequency dividing elements and second output terminals of the equalizer.

Consequently, through signal input part through a plurality of frequency division component transmission different position audio signal, a plurality of speakers are connected to the first output of rethread frequency division component, and the signal output part of the drive module that raises one's voice can increase more woofers and connect, realizes low-cost speaker extension to realize promoting vehicle audio's tone quality effect.

In some embodiments, the equalizer includes a filter circuit and an operational amplifier circuit connected to each other.

Therefore, sound effect adjustment is carried out in the audio signal input equalizer, a filter circuit and an operational amplifier circuit exist between a first-order filter and an AMP chip in the equalizer, corresponding parameters are adjusted through the equalizer, so that more flexible sound effect adjustment is realized, and the sound quality effect of the vehicle-mounted sound is further improved.

In some embodiments, the frequency dividing element is a frequency dividing capacitor.

Therefore, the crossover element is integrated in the loudspeaker driving module, and a specific loudspeaker with a corresponding crossover element (such as a crossover capacitor) does not need to be found when the loudspeaker is replaced, so that a common loudspeaker can be used, and the convenience degree of replacing the loudspeaker is improved.

In some embodiments, the first output of the front-left corresponding frequency dividing element is for connecting: at least one of a midrange speaker located at the left front door, a tweeter located at the left front door; and/or the first output end of the frequency dividing element corresponding to the front right is used for connecting: at least one of a midrange speaker located at the right front door, a tweeter located at the right front door; and/or the first output end of the frequency dividing element corresponding to the rear left is used for connecting: a woofer located at the left rear door; and/or the first output end of the frequency dividing element corresponding to the back and the right is used for connecting: a woofer located at the right rear door.

Consequently, signal output part and frequency division component one-to-one connect the speaker through the first output of frequency division component, connect left back door woofer, right back door woofer, help adjusting the regional bass audio of car back door to the realization promotes on-vehicle stereo set's tone quality effect.

In some embodiments, the equalizer is coupled to the second output corresponding to the front left: a woofer located at the left front door; and/or the equalizer and the second output end corresponding to the front right are used for being connected with: a woofer located at the front right door.

Consequently, audio signal passes through the woofer of audio signal conveying back to left front door, the woofer of right front door, realizes qianmen woofer's extension, improves and adjusts the regional bass audio of plantago door, and the cooperation is preceding, the tweeter uses, further realizes promoting the tone quality effect of whole car vehicle-mounted sound.

In some embodiments, the speaker driving module further includes a power input end for plugging a power supply module, and the power input end is connected to both the frequency dividing element and the equalizer.

A second aspect of the present application provides a vehicle-mounted multimedia system, comprising: a plurality of speakers, car machine module and the drive module of raising one's voice, the audio signal in different position on the car machine module inserts respectively to the different signal input part of the drive module of raising one's voice, and the signal output part of the drive module of raising one's voice is connected with different speakers respectively to drive the speaker broadcast.

Consequently, realize whole car audio through on-vehicle multimedia system and adjust, the audio signal access on the car machine module drive module of raising one's voice, through the output after the frequency division is adjusted, the speaker broadcast of different regions in the drive car to promote whole car tone quality effect.

In some embodiments, the multimedia system further comprises a housing, the plurality of speakers comprise subwoofer speakers, the speaker driving module is integrated in the PCBA, and the subwoofer speakers and the PCBA are both disposed in the housing.

Therefore, the loudspeaker driving module is integrated on the PCBA, and the frequency division element originally positioned on the specific loudspeaker is integrated on the printed circuit board, so that when the loudspeaker is replaced, a common loudspeaker is selected, and the convenience degree of replacing the loudspeaker is improved.

In some embodiments, the multimedia system further comprises a heat sink for dissipating heat from the PCBA, the heat sink being disposed on the housing.

Therefore, the radiating fins can quickly radiate the electronic elements integrated on the PCBA through heat transfer, and normal use of the vehicle-mounted multimedia system is guaranteed.

In some embodiments, the number of speakers includes at least one of: the low-pitch loudspeaker, the middle-pitch loudspeaker and the high-pitch loudspeaker are positioned on the left front door, the low-pitch loudspeaker, the middle-pitch loudspeaker and the high-pitch loudspeaker are positioned on the right front door, the low-pitch loudspeaker is positioned on the left rear door, the low-pitch loudspeaker is positioned on the right rear door, and the subwoofer is positioned on the rear seat.

Therefore, the signal output end of the loudspeaking driving module is connected with the loudspeakers of the left and right doors, and the loudspeaker covers the sound field area on the left half side and the sound field area on the right half side of the whole car respectively, so that the uniformity of the transmission distribution of the audio signals of the whole car is increased, and the tone quality effect of the vehicle-mounted sound is improved.

The beneficial effect of this application technical scheme lies in, can promote the tone quality effect of on-vehicle stereo set and the degree of convenience of replacement speaker.

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

Drawings

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

Fig. 1 is a schematic diagram of a frame of an embodiment of a speaker driving module according to the present application;

fig. 2 is a schematic view of a speaker connection according to an embodiment of the present application;

FIG. 3 is a schematic power connection diagram of an embodiment of the present application;

fig. 4 is a schematic diagram of a framework of an embodiment of the vehicle multimedia system of the present application.

Detailed Description

The following describes in detail the embodiments of the present application with reference to the drawings attached hereto.

In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular system structures, interfaces, techniques, etc. in order to provide a thorough understanding of the present application.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship. Further, the term "plurality" herein means two or more than two. In addition, the term "at least one" herein means any one of a variety or any combination of at least two of a variety, for example, including at least one of A, B, C, and may mean including any one or more elements selected from the group consisting of A, B and C. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1, fig. 1 is a schematic frame diagram of a speaker driving module according to an embodiment of the present application. In the embodiment of the present disclosure, the speaker driving module 100 may include: the signal input terminals 101 (shown by black dots on the left side of the dashed line box in fig. 1) are respectively used for accessing audio signals in different directions on the car machine module (not shown), and the frequency dividing elements are connected with the signal input terminals 101 in a one-to-one correspondence manner. Different orientations may specifically include, but are not limited to, front left, front right, back left, back right. Illustratively, the frequency dividing element may include, but is not limited to, a frequency dividing capacitor. The frequency dividing elements are used for connecting the signal input terminal 101 and at least one of the woofer, the midrange speaker and the tweeter, taking the frequency dividing element as an example, the frequency dividing elements adopt frequency dividing capacitors, and the frequency dividing elements may include a first frequency dividing capacitor 102 corresponding to the front left, a second frequency dividing capacitor 103 corresponding to the front right, a third frequency dividing capacitor 104 corresponding to the rear left, and a fourth frequency dividing capacitor 105 corresponding to the rear right. In addition, in the embodiment of the present disclosure, the speaker driving module 100 may further include an equalizer 106 and a plurality of signal output terminals 107 (i.e., shown by black dots on the right side of the dashed box in fig. 1).

In one implementation scenario, the frequency dividing element is used to implement frequency division of high and low tones according to the principle of capacitive conduction and high frequency resistance and resistive conduction and low frequency resistance. The frequency dividing element includes a first input terminal (not shown) and a first output terminal (not shown), taking the frequency dividing element using a frequency dividing capacitor as an example, the first input terminal 1021 of the first frequency dividing capacitor is connected to the audio FL (left channel), the first input terminal 1031 of the second frequency dividing capacitor is connected to the audio FR (right channel), the first input terminal 1041 of the third frequency dividing capacitor is connected to the audio RR (right surround), and the first input terminal 1051 of the fourth frequency dividing capacitor is connected to the audio RL (left surround). By accessing different independent vocal tract signals, each user can enjoy different sound sources.

In one particular implementation scenario, active crossover is used to operate the various speakers 108 connected in the most appropriate wavelength band. The active frequency division adopts weak signal electronic circuit signals to carry out frequency division processing, so that the sound signal loss is small, the distortion is small, the reproduction tone quality is good, and the attenuation rate of the frequency division can be higher than that of the passive frequency division. For example, the frequency dividing element adopts a frequency dividing capacitor to divide the frequency of weak audio signals, and after the audio signals of different directions of the audio input end are subjected to weak frequency division, bass, middle and treble signals are sent to respective power amplifiers and then output to bass, middle and treble loudspeakers by the power amplifiers.

In one implementation scenario, the equalizer 106 in the speaker driving module 100 includes a second input 1061, and a filter circuit (not shown) and an operational amplifier circuit (not shown) connected to each other. In one specific implementation scenario, for example, the first order filter (not shown) and the AMP chip (not shown) may be passed. The first order filter may be a first order low pass filter that passes (without attenuation) the input signal when its frequency is within a cutoff frequency, and produces attenuation when its frequency is higher than this frequency.

In one implementation scenario, the number of signal outputs 107 includes a first output (not shown) of the number of crossover elements and a second output (not shown) of the equalizer 106, wherein the first output of the number of crossover elements is connected to at least one of a woofer, a midrange speaker, and a tweeter, and the equalizer 106 is connected to the subwoofer 1087 with the second outputs corresponding to the rear left and the rear right.

In one particular implementation scenario, the speakers 108 to which the number of signal outputs 107 are connected include at least one of tweeters, midrange speakers, woofers. Referring to fig. 1, the tweeter includes a front left tweeter 1082 and a front right tweeter 1084, the tweeters having a frequency band in the range of 2000Hz to 20000Hz, the midrange speakers include a front left midrange speaker 1081 and a front right midrange speaker 1083, the midrange speakers having a frequency band in the range of 200Hz to 2000Hz, and the woofers include a front left woofer 1085, a front right woofer 1086, a rear left woofer 1088, and a rear right woofer 1089, the woofer having a frequency band in the range of 20Hz to 200Hz. At ordinary sound pressure levels, most people can hear sounds in the audio frequency range of 20Hz to 20000 Hz. Illustratively, a tweeter has a frequency range of 2000-4309 Hz for high pitch, 4309-9283 Hz for ultra high pitch, and 9283-20000 Hz for ultra high pitch, and is characterized by rapid vibration to produce sound, but generally with a relatively small vibration amplitude. The high pitch loudspeaker generally uses a relatively light, thin and tough diaphragm, the area, namely the caliber of the loudspeaker is relatively small, and the high pitch loudspeaker requires a high upper limit of a playback frequency range and a large input capacity; the medium-pitch loudspeaker is used for realizing the frequency connection when the bass loudspeaker and the high-pitch loudspeaker reproduce music, and is characterized in that the vibration speed is moderate, but the vibration amplitude is relatively large, and the caliber of the loudspeaker is relatively large because of bearing the main sound content; woofers are typically used to cover the lowest octave of the speaker frequency range, being the largest power-sustaining speaker.

In another specific implementation scenario, referring to fig. 2, fig. 2 is a schematic diagram of speaker connection of an embodiment of the speaker driving module of the present application, and referring to fig. 1 and fig. 2 in combination, a first output end (not shown) of a crossover element corresponding to the front left is connected to a tweeter 201 located at the front left door, or a midrange speaker 202 located at the front left door, or both the tweeter 201 and the midrange speaker 202 located at the front left door; a first output (not shown) of the front right corresponding crossover is connected to tweeter 205 located at the front right door or midrange speaker 206 located at the front right door or to tweeter 205 or midrange speaker 206 located at the front right door; the first output end (not shown) of the left rear corresponding crossover element is connected with the woofer 204 positioned at the left rear door; the first output (not shown) of the rear right corresponding crossover element is connected to the woofer 208 located at the right rear door. A second output (not shown) of equalizer 106 is connected to left front door woofer 203, right front door woofer 207, and subwoofer 209.

According to the above scheme, the signal input end 101 transmits audio signals in different directions through the plurality of frequency dividing elements, and then the first output end (not shown) of the frequency dividing element is connected with the plurality of speakers 108, so that the signal output end 107 of the speaker driving module 100 can be connected with more woofers, and low-cost speaker extension is realized, thereby realizing the effect of improving the tone quality of the vehicle-mounted sound.

Referring to fig. 3, fig. 3 is a schematic power connection diagram according to an embodiment of the present disclosure. In the embodiment of the present disclosure, a power input end of the speaker driving module 303 is used for plugging the power supply module 301, and a two-pole connection end 302 of the power input end is connected to both the frequency dividing element 3031 and the equalizer 3032 of the speaker driving module 303. Note that, the speaker driving module 303 has the same meaning as that described in the speaker driving module 100 in the foregoing embodiment.

In an implementation scenario, the equalizer 3032 adjusts the sound effect by dividing the frequency spectrum of the sound into N segments, adjusting corresponding parameter values by the equalizer 3032, enhancing or suppressing each segment of the frequency spectrum to achieve the effect of optimizing the sound, reducing the high-frequency noise amount of signals in the transmission process, and further filtering the signals mixed in the bass signals and above the low frequency to achieve the adjustment of the bass sound effect, and part of the vehicle-mounted sound devices have preset effects to adapt to different audio contents, thereby improving the sound quality effect of the vehicle-mounted sound devices of the whole vehicle. The specific circuit structure of each circuit can be realized by adopting the existing circuit structure, and the application is not limited herein.

Referring to fig. 4, fig. 4 is a schematic diagram of a framework of an embodiment of the vehicle multimedia system of the present application. In the disclosed embodiment, the in-vehicle multimedia system 400 includes: an in-vehicle module 401, a speaker driving module 402, and a plurality of speakers 403, wherein audio signals in different directions of the in-vehicle module 401 are respectively connected to different signal input terminals (not shown) of the speaker driving module 402; the signal output ends (not shown) of the speaker driving module 402 are respectively used for connecting with different speakers 403 to drive the speakers 403 to play; the several speakers 403 include a tweeter 4031, a midrange speaker 4032, a woofer 4033, and a subwoofer 4034. The speaker driving module 402 has the same meaning as that described in the speaker driving module 100 in the embodiment of fig. 1. In addition, the multimedia system 400 further includes a PCBA heat sink 404 and a housing 405, where the heat sink 404 and the subwoofer 4034 are both disposed on the housing 405. The system adopts the closed structure, and audio signal is more clear, is favorable to promoting the tone quality effect.

In one implementation scenario, the number of speakers 403 in the in-vehicle multimedia system 400 includes at least one of: tweeter 4031 may be located in the front left or right door; the midrange speaker 4032 may be located on the left front door or the right front door; the woofer 4033 may be located in the left and right front doors or the left and right rear doors; a subwoofer 4034 located in the rear seat.

In a specific implementation scenario, the installation positions of the speakers 403 often affect the sound effect of the car audio, and the tweeter 4031 should be installed at a position as flat as possible to the human ear, for example, at the front, rear door or above the instrument desk of the car, so that the sound field is substantially flat to the human ear, and the user can experience better sound quality effect. Compared with the high pitch, the low pitch has the advantages that the low pitch is weak in direction, the sound producing direction is difficult to distinguish by human ears, and a general subwoofer 4034 needs a box body, is large in size and is suitable for being installed on the position of a rear seat of a vehicle. In another specific implementation scenario, the vehicle multimedia system is connected to a plurality of speakers 403, including but not limited to coaxial, full range, split, and ultra-low unit, and the plurality of speakers 403 includes at least a tweeter 4031, a midrange speaker 4032, a woofer 4033, and a subwoofer 4034. The subwoofer 4034 functions to emphasize the bass band, that is, to boost the long-wave portion (below 100Hz, even including infrasonic waves) in the audio. It is difficult to cover the entire audio band with only one speaker due to the limitations of the capacity and structure of the speaker unit itself. On the basis of the left and right sound channels of the front door and the left and right sound channels of the rear door, one path of subwoofer output is added to achieve the purpose of improving the bass sound effect of the whole vehicle.

In one implementation scenario, the PCBA is intended to provide a central hub for integrating all of the electronic components in a vehicle multimedia system. In one particular implementation scenario, the PCBA may laminate conductive paths or traces onto a substrate material, illustratively by creating a board using multiple layers. The copper wire is used for conducting electricity, and is used as a circuit of all components welded on the board to be connected with the power supply module, so that the loudspeaker driving module 402 is powered, and insulation and safe current transmission are provided. The loudspeaker driving module 402 includes a frequency dividing element, when replacing the loudspeakers 403, the frequency dividing element is integrated on the PCBA, and it is not necessary to search for a specific loudspeaker with a corresponding frequency dividing element (such as a frequency dividing capacitor), and connect a general common loudspeaker, so that it is more convenient to replace the loudspeakers.

In one implementation scenario, the PCBA heat sink 404 is used to dissipate heat for the PCBA, and the PCBA heat sink 404 is disposed within the housing 405. In one particular implementation, the PCBA heat sink 404 is coated with a layer of thermally conductive silicone grease on the surface of the electronic component that contacts the heat sink during use, so that heat generated by the component is more efficiently conducted to the heat sink and dissipated to the ambient air through the heat sink, and the PCBA heat sink 404 helps to ensure stable operation of the in-vehicle multimedia system 400.

The vehicle-mounted multimedia system 400 can realize the extension of the low-cost subwoofer and the woofer through the loudspeaking driving module 402, and can also improve the tone quality effect of the vehicle-mounted sound and the convenience degree of replacing the speaker.

Claims (10)

1. A loudspeaker drive module, comprising:

the system comprises a plurality of signal input ends, a plurality of signal output ends and a plurality of signal output ends, wherein the signal input ends are respectively used for accessing audio signals in different directions on a vehicle machine module, and the different directions comprise a front left direction, a front right direction, a rear left direction and a rear right direction;

the frequency dividing elements are connected with the signal input ends in a one-to-one correspondence manner, each frequency dividing element comprises a first output end and a first input end connected with the signal input end, and the first output end is used for being connected with at least one of a woofer, a middle-pitch loudspeaker and a high-pitch loudspeaker;

the equalizer comprises second input ends which are connected with the signal input ends in a one-to-one correspondence mode and second output ends which are in one-to-one correspondence with the different directions, and the second output ends which correspond to the rear left end and the rear right end are used for being connected with a subwoofer;

a plurality of signal outputs including a first output of the plurality of frequency dividing elements and a second output of the equalizer.

2. The loudspeaker drive module of claim 1 wherein the equalizer comprises a filter circuit and an operational amplifier circuit connected to each other.

3. The loudspeaker driving module of claim 1 wherein said frequency dividing element is a frequency dividing capacitor.

4. The loudspeaker drive module of claim 1 wherein the first output terminal of the frequency divider element corresponding to the front left is configured to connect to: at least one of a midrange speaker located at the left front door, a tweeter located at the left front door;

and/or the first output end of the frequency dividing element corresponding to the front right is used for connecting: at least one of a midrange speaker located at the right front door, a tweeter located at the right front door;

and/or the first output end of the frequency dividing element corresponding to the rear left is used for connecting: a woofer located at the left rear door;

and/or the first output end of the frequency dividing element corresponding to the back and the right is used for connecting: a woofer located at the right rear door.

5. The loudspeaker drive module of claim 1 wherein said equalizer is connected to said front-left corresponding second output: a woofer located at the left front door;

and/or the equalizer and the second output end corresponding to the front right are used for being connected with: a woofer located at the right front door.

6. The speaker driver module according to claim 1, wherein the speaker driver module further comprises a power input end for plugging a power supply module, and the power input end is connected to both the frequency divider and the equalizer.

7. A car multimedia system, comprising a plurality of speakers, a car machine module and the speaker driving module of any one of claims 1 to 6;

the audio signals in different directions on the car machine module are respectively connected to different signal input ends of the loud speaker driving module, and the signal output ends of the loud speaker driving module are respectively connected with different loudspeakers to drive the loudspeakers to play.

8. The vehicle multimedia system of claim 7, further comprising a housing, wherein the plurality of speakers comprises a subwoofer, wherein the speaker driver module is integrated into a PCBA, and wherein the subwoofer and the PCBA are disposed within the housing.

9. The vehicle multimedia system of claim 8, further comprising a heat sink for dissipating heat from the PCBA, the heat sink being disposed on the housing.

10. The vehicle multimedia system of claim 7, wherein said number of speakers comprises at least one of: the low-pitch loudspeaker, the middle-pitch loudspeaker and the high-pitch loudspeaker are positioned on the left front door, the low-pitch loudspeaker, the middle-pitch loudspeaker and the high-pitch loudspeaker are positioned on the right front door, the low-pitch loudspeaker is positioned on the left rear door, the low-pitch loudspeaker is positioned on the right rear door, and the subwoofer is positioned on the rear seat.

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