CN108882129B - Circuit board, loudspeaker, electronic equipment and polarization compensation method - Google Patents
Circuit board, loudspeaker, electronic equipment and polarization compensation method Download PDFInfo
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- CN108882129B CN108882129B CN201811107503.3A CN201811107503A CN108882129B CN 108882129 B CN108882129 B CN 108882129B CN 201811107503 A CN201811107503 A CN 201811107503A CN 108882129 B CN108882129 B CN 108882129B
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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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
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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
- H04R2400/00—Loudspeakers
- H04R2400/11—Aspects regarding the frame of loudspeaker transducers
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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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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The invention discloses a circuit board, a loudspeaker, electronic equipment and a polarization compensation method for the loudspeaker, wherein the loudspeaker comprises a voice coil which is fixed relative to the circuit board, and the circuit board comprises a circuit board body and a wiring area arranged on the circuit board body; the wiring area comprises at least two polarization compensation areas corresponding to the voice coils, and each polarization compensation area comprises a vibration detection line and a vibration compensation line; each vibration detection line outputs detection current to an external processor electrically connected with the circuit board when vibrating along with the voice coil, so that the external processor obtains polarization information according to the detection current of all the vibration detection lines and inputs compensation current into each vibration compensation line according to the polarization information.
Description
Technical Field
The invention relates to the technical field of electroacoustic conversion. And more particularly, to a circuit board, a speaker, an electronic apparatus, and a polarization compensation method.
Background
A speaker is a basic sound-emitting unit that converts an electrical signal into an acoustic signal. With the development of the mobile communication equipment industry, the micro speaker industry is rapidly developed, and the requirements on the performance of the micro speaker are higher and higher.
Be equipped with vibration system and magnetic circuit in the speaker, wherein, vibration system includes voice coil loudspeaker voice coil and vibrating diaphragm, and after letting in current on the voice coil loudspeaker voice coil, the voice coil loudspeaker voice coil atress vibration under magnetic field's of magnetic circuit, the voice coil loudspeaker voice coil vibration drives the vibrating diaphragm vibration sound production. The diaphragm is susceptible to polarization from air currents in the micro-speaker during vibration. Especially under the frivolous trend of electronic equipment such as cell-phone, the speaker that the side sounded obtains more and more extensive application, and the sound outlet of the speaker that the side sounded is located one side of speaker, and when the vibrating diaphragm vibration was sounded, the air current in vibrating diaphragm the place ahead was asymmetric, leads to the speaker to have the polarization, and then makes the tone quality of speaker reduce, and customer experience is poor.
Disclosure of Invention
An object of the present invention is to provide a circuit board for a speaker to prevent a polarization phenomenon of a vibration system and improve acoustic performance of the speaker. It is another object of the present invention to provide a speaker, it is another object of the present invention to provide an electronic device, and it is another object of the present invention to provide a speaker polarization compensation method.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses a circuit board for a loudspeaker, wherein the loudspeaker comprises a voice coil which is fixed relative to the circuit board, and the circuit board comprises a circuit board body and a wiring area arranged on the circuit board body;
the wiring area comprises at least two polarization compensation areas corresponding to the voice coils, and each polarization compensation area comprises a vibration detection line and a vibration compensation line;
and each vibration detection line outputs detection current to an external processor electrically connected with the circuit board when vibrating along with the voice coil, so that the external processor obtains polarization information according to the detection current of all the vibration detection lines and inputs compensation current into each vibration compensation line according to the polarization information.
Preferably, the voice coil comprises two opposing first sides and two opposing second sides;
the wiring area comprises two polarization compensation areas which are respectively arranged corresponding to the two first edges or the two second edges; alternatively, the first and second electrodes may be,
the wiring area comprises two polarization compensation areas which are respectively arranged corresponding to one first edge and one second edge; alternatively, the first and second electrodes may be,
the wiring area comprises four polarization compensation areas which are respectively arranged corresponding to the two first edges and the two second edges.
Preferably, the speaker includes a side sound outlet, the voice coil includes a first edge near the side sound outlet, and the routing area includes two polarization compensation areas respectively disposed on opposite edges of the first edge and the first edge.
Preferably, the circuit board comprises a first face close to the voice coil and a second face far away from the voice coil;
the polarization compensation area is arranged on the first surface or the second surface of the circuit board.
Preferably, the circuit board comprises a first face close to the voice coil and a second face far away from the voice coil;
the at least two polarization compensation regions comprise a first compensation region arranged on the first surface and a second compensation region arranged on the second surface.
Preferably, a plurality of electric connection terminals electrically connected with the external processor are arranged at the outer side end part of the circuit board far away from the loudspeaker; wherein the content of the first and second substances,
the vibration detection line and the vibration compensation line are connected with the electric connection terminal through the wiring of the wiring area.
Preferably, the circuit board is provided with two land portions for electrical connection with two voice coil leads of the voice coil, respectively.
In another aspect of the invention, a speaker is disclosed, which comprises the circuit board as described above.
The invention further discloses an electronic device, which comprises the loudspeaker and a processor electrically connected with the loudspeaker;
the processor is used for receiving the detection currents according to all the vibration detection lines, processing the detection currents to obtain polarization information, and inputting the compensation current into each vibration compensation line according to the polarization information.
The invention also discloses a loudspeaker polarization compensation method, which comprises the following steps:
receiving detection current output by a circuit board fixed with a voice coil of a loudspeaker when the voice coil vibrates;
obtaining polarization information according to the detection currents of all the vibration detection lines;
inputting a compensation current into each vibration compensation line according to the polarization information,
the circuit board comprises a circuit board body and a wiring area arranged on the circuit board body, the wiring area comprises at least two polarization compensation areas corresponding to the voice coil, and each polarization compensation area comprises a vibration detection line and a vibration compensation line.
The invention has the following beneficial effects:
the invention arranges at least two polarization compensation areas corresponding to the voice coil on the circuit board, wherein each polarization compensation area comprises a vibration detection line and a vibration compensation line. When the voice coil vibrates, the vibration detection line can follow the vibration of the voice coil, namely, the vibration detection line moves in a magnetic field formed by the magnetic circuit system, and detection current can be generated on the vibration detection line. Each polarization compensation area corresponds to one side of the voice coil, and the vibration condition of the voice coil can be obtained by analyzing the detection current generated on the vibration detection lines on different sides of the voice coil, so that whether the loudspeaker vibration system has polarization or not can be obtained. When polarization exists, compensation current corresponding to the polarization condition can be input into the vibration compensation line, and after the compensation current is input into the circuit board, the circuit board vibrates under the action of a magnetic field of the magnetic circuit system to drive the voice coil and the vibrating diaphragm to vibrate, so that the polarization of a vibration system is offset, and the tone quality of the loudspeaker is improved.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 shows a schematic side view of a circuit board for a loudspeaker according to an embodiment of the invention.
Figure 2 shows another schematic view of a circuit board for a speaker according to an embodiment of the present invention.
Figure 3 shows an exploded view of a loudspeaker according to an embodiment of the invention.
Fig. 4 is an exploded view of a speaker module according to an embodiment of the present invention.
Fig. 5 shows a flow chart of a method of speaker polarization compensation in one embodiment of the present invention.
Reference numerals:
11. module inferior valve, 12, module superior cover, 2, speaker, 31, leak hole, 32, screen cloth, 21, casing, 221, vibrating diaphragm body portion, 222, reinforcement central part, 23, voice coil, 24, circuit board, 25, magnetic yoke, 261, central magnet, 262, limit magnet, 27, magnetic conduction board, 241, vibration detection line, 242, vibration compensation line, 243, via hole, 244, pad, 245, electrical connection terminal, 246, routing.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
In the prior art, a loudspeaker includes a housing, and a vibration system and a magnetic circuit system provided in the housing. The vibration system comprises a diaphragm and a voice coil fixed below the diaphragm. The magnetic circuit system is provided with a magnetic gap, and one end of the voice coil, which is far away from the vibrating diaphragm, is suspended in the magnetic gap. When current is introduced into the voice coil, the voice coil is stressed to vibrate under the action of the magnetic gap magnetic field, and the voice coil vibrates to drive the vibrating diaphragm to vibrate and produce sound. When the voice coil and the vibrating diaphragm of the vibration system are influenced by air flow in the loudspeaker and are polarized, particularly when the loudspeaker is a side sound outlet loudspeaker, the polarization phenomenon is particularly obvious between two sides close to the side sound outlet and far away from the side sound outlet, the tone quality and the acoustic performance of the loudspeaker are influenced, and the user experience is reduced.
In order to solve the polarization problem of the speaker in the prior art, according to one aspect of the present invention, as shown in fig. 1-4, a circuit board 24 for a speaker is disclosed.
In this embodiment, the circuit board 24 includes a circuit board body and a wiring area disposed on the circuit board body. The wiring region includes at least two polarization compensation regions corresponding to the voice coil 23, and each polarization compensation region includes one vibration detection line 241 and one vibration compensation line 242.
When the speaker 2 normally operates, each of the vibration detection lines 241 vibrates along with the voice coil 23, a detection current is formed on the vibration detection line 241 and is output to an external processor electrically connected to the circuit board 24, so that the external processor obtains polarization information according to the detection currents of all the vibration detection lines 241 and inputs a compensation current into each of the vibration compensation lines 242 according to the polarization information.
The present invention detects the polarization of the vibration system of the speaker 2 by providing a vibration detection line 241 on the circuit board 24. When the voice coil 23 vibrates to drive the vibrating diaphragm to vibrate and sound, the vibration detection line 241 is vibrated along with the voice coil 23 and the vibrating diaphragm, namely, the vibration detection line 241 moves in a magnetic field formed by the magnetic circuit system, and a detection current can be formed on the vibration detection line 241. When the vibrations of different sides of the voice coil 23 are different, the detection currents formed on the vibration detection lines 241 are also different. Each polarization compensation region corresponds to one side of the voice coil 23, and the vibration conditions of different sides of the voice coil 23 can be obtained by analyzing the detection current generated on the vibration detection lines 241 of different sides of the voice coil 23, thereby obtaining whether the vibration system of the speaker 2 has polarization. When polarization is present, a compensation current corresponding to the polarization case may be input into the vibration compensation line 242. After the compensation current is input, the circuit board 24 vibrates under the action of the magnetic field of the magnetic circuit system to drive the voice coil 23 and the diaphragm to vibrate, so that the polarization of the vibration system is offset, the vibration balance is kept, and the tone quality of the loudspeaker 2 is improved.
In the loudspeaker 2, the voice coil 23 is generally rectangular, and the voice coil 23 includes two opposing first sides and two opposing second sides.
In a preferred embodiment, the routing region may include two polarization compensation regions disposed corresponding to the two first edges or the two second edges, respectively. The two polarization compensation regions may be disposed on two opposite first edges, respectively, or may also be disposed on two opposite second edges, respectively. Of course, in other embodiments, two polarization compensation regions may be disposed on one first side and one second side, respectively.
When the speaker 2 is a side sound outlet speaker 2, the speaker 2 includes a side sound outlet, a polarization compensation region may be disposed on one side of the voice coil 23 close to the side sound outlet, and a polarization compensation region may be disposed on the other side of the voice coil 23 far from the side sound outlet. So that the regions of the side sound-emitting speaker 2 where the polarization is severe, i.e., the regions close to and far from the side sound-emitting port, can be detected and compensated for.
In other optional embodiments, the routing region may further include four polarization compensation regions respectively disposed corresponding to the two first edges and the two second edges. Four polarization compensation regions are arranged on the circuit board 24 to detect and compensate the overall polarization condition of the voice coil 23 and the diaphragm, so as to further improve the acoustic performance of the loudspeaker 2.
The circuit board 24 may include a first side adjacent to the voice coil 23 and a second side facing away from the voice coil 23.
In alternative embodiments, the polarization compensation region may be disposed on the first or second side of the circuit board 24. For example, in the present embodiment, two polarization compensation regions are provided on one side surface of the circuit board 24. Of course, each polarization compensation region can be disposed on the first side and also disposed on the second side, and the electrical connection between the polarization compensation region of the first side or the second side and the external processor can be realized through the traces 246 on the circuit board 24.
In other optional embodiments, the at least two polarization compensation regions include a first compensation region disposed on the first surface and a second compensation region disposed on the second surface. The polarization compensation region may be disposed on one side surface of the circuit board 24, or may be disposed on both side surfaces of the circuit board 24. When the polarization compensation regions are disposed on the two side surfaces of the circuit board 24, the polarization compensation regions include a first compensation region disposed on the first surface of the circuit board 24 on one side of the voice coil 23 and a second compensation region disposed on the second surface of the circuit board, the vibration detection lines and the vibration compensation lines of the first and second compensation regions are required to be respectively disposed in parallel, that is, the vibration detection line of the first compensation region is connected in parallel with the vibration detection line of the second compensation region, the vibration compensation line of the first compensation region is connected in parallel with the vibration compensation line of the second compensation region, and the polarization compensation regions are formed by disposing the compensation regions on the two side surfaces of the circuit board 24.
It should be noted that due to the space limitation of the traces 246 of the circuit board 24, a plurality of vias 243 need to be formed on the circuit board 24, so that the trace area can trace the traces 246 on both sides of the circuit board 24 through the vias 243, and the vibration detection line 241, the vibration compensation line 242, and the voice coil leads electrically connected to the pads communicate with the electrical connection terminals. . At the outer end of the circuit board 24 remote from the loudspeaker 2, a plurality of electrical connection terminals 245 are provided for electrical connection with the processor.
Further, the vibration detection line 241 and the vibration compensation line 242 in the present embodiment are located directly above the voice coil 23, that is, directly above the magnetic gap, corresponding to the region where the magnetic field strength is strong. The vibration detection line 241 and the vibration compensation line 242 are connected to the electrical connection terminal 245 through the wiring 246 of the wiring region. The region outside the magnetic gap where the magnetic field strength is weak has a small influence on the detection current formed on the vibration detection line 241, and the accuracy of the polarization detection of the vibration system of the speaker 2 can be ensured.
The circuit board 24 is provided with two land portions 244 for electrical connection with the two leads of the voice coil 23, respectively. Preferably, the two pads 244 are located in the hollow portion of the voice coil 23, and two leads of the voice coil 23 may be respectively soldered to the two pads 244, so that the voice coil 23 may be electrically connected to an external circuit through the circuit board 24.
As shown in fig. 3, according to another aspect of the present invention, the present embodiment further discloses a specific embodiment of a speaker. In this embodiment, the circuit board 24 according to this embodiment is applied to the speaker 2.
In the present embodiment, the speaker 2 includes a housing 21, and a vibration system and a magnetic circuit system provided in the housing 21.
Wherein the vibration system may comprise a diaphragm and a voice coil 23 fixed below the diaphragm. The circuit board 24 is disposed between the diaphragm and the voice coil 23, and the voice coil 23 is fixed to the circuit board 24.
The diaphragm may include a diaphragm center portion in the center of the diaphragm and a diaphragm edge portion connected to the edge of the diaphragm center portion, which together form the diaphragm body portion 221. In order to increase the vibration characteristics of the diaphragm, the diaphragm center portion generally includes a body center portion and a reinforcing center portion 222 bonded to a surface of the body center portion. In order to reduce the weight of the vibrating diaphragm and further improve the vibration performance of the vibrating diaphragm, the center of the center part of the body can be hollowed out. The hollow edge of the center of the body needs to be located at the inner side of the edge of the reinforcing center 222 combined and fixed with the hollow edge, so that the hollow area is smaller than the area of the reinforcing center 222 attached to the hollow edge, and the air tightness of the diaphragm is ensured. Preferably, a circuit board 24 may be fixed below the diaphragm, and the voice coil 23 may be fixed on the circuit board 24 so as to be fixed relative to the circuit board 24.
The magnetic circuit is formed with a magnetic gap in which the end of the voice coil 23 remote from the diaphragm is suspended. The magnetic circuit system may include a yoke 25, a magnet fixed at the center of the yoke 25, and a magnetic conductive plate 27 on the upper surface of the magnet. In this embodiment, in order to increase the magnetic field intensity formed by the magnetic circuit system, the magnetic circuit system forms a central magnetic circuit by arranging the magnet 261 and the magnetic conductive plate 27 at the center of the magnetic conductive yoke 25, forms a side magnetic circuit by arranging the plurality of side magnets 262 at the edge of the magnetic conductive yoke 25, and forms a side magnetic circuit by arranging the side magnetic conductive plate on the upper surface of the side magnet 262, thereby forming a magnetic gap for accommodating the voice coil 23 between the central magnetic circuit and the side magnetic circuit. The magnetic yoke 25 is generally rectangular, the side magnets 262 may be disposed on four sides of the magnetic yoke 25, or may be disposed only on two opposite long sides or short sides of the magnetic yoke 25, the edge of the magnetic yoke 25 where the side magnets 262 are not disposed extends perpendicularly with respect to the magnetic yoke 25 to form a side wall, and the side magnetic path and the side wall together form a magnetic gap with the central magnetic path. In other embodiments, the yoke 25 may further include a bottom wall having a flat plate shape and a side wall extending toward the vibration system along an edge of the bottom wall. The side wall of the yoke 25 forms a magnetic gap with the magnet and the magnetic conductive plate 27 to accommodate the lower end of the voice coil 23.
In an alternative embodiment, as shown in figure 4, the loudspeaker 2 may be provided in a sounder module which may comprise a module housing and a loudspeaker 2 according to the present embodiment provided in a cavity formed by the module housing. Wherein, the module housing may include a module upper case 12 and a module lower case 11 which are correspondingly disposed. The speaker 2 is divided into a front sound cavity and a rear sound cavity by a cavity formed by the module shell, and a sound absorbing material used for adjusting tone quality can be arranged in the rear sound cavity. Furthermore, a pressure-equalizing leakage hole 31 can be formed in the module shell of the rear acoustic cavity, and a mesh 32 is further arranged on the outer surface of the module shell corresponding to the leakage hole 31 to increase the damping of the leakage hole 31.
According to another aspect of the present invention, the present embodiment further discloses an electronic device. In this embodiment, the electronic device includes the speaker 2 according to this embodiment and a processor electrically connected to the speaker 2.
The processor may receive the detection currents from all the vibration detection lines 241, process the detection currents to obtain polarization information, and input a compensation current into each vibration compensation line 242 according to the polarization information.
According to still another aspect of the present invention, as shown in fig. 5, the present embodiment further discloses a method for polarization compensation of a speaker 2, the method comprising:
s100: and receives a detection current outputted from a circuit board 24 fixed to the voice coil 23 when the voice coil 23 of the speaker 2 vibrates. The circuit board 24 includes a circuit board body and a wiring area disposed on the circuit board body, the wiring area includes at least two polarization compensation areas corresponding to the voice coil 23, and each polarization compensation area includes a vibration detection line 241 and a vibration compensation line 242.
S200: obtaining polarization information according to the detection currents of all the vibration detection lines 241;
s300: a compensation current is input into each vibration compensation line 242 according to the polarization information.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (7)
1. A circuit board for a loudspeaker, the loudspeaker comprises a voice coil fixed relative to the circuit board, and the circuit board is characterized by comprising a circuit board body and a wiring area arranged on the circuit board body;
the wiring area comprises at least two polarization compensation areas corresponding to the voice coils, and each polarization compensation area comprises a vibration detection line and a vibration compensation line;
each vibration detection line outputs detection current to an external processor electrically connected with a circuit board when vibrating along with the voice coil, so that the external processor obtains polarization information according to the detection current of all the vibration detection lines and inputs compensation current into each vibration compensation line according to the polarization information, and the circuit board vibrates under the action of the magnetic force of a magnetic circuit system of the loudspeaker and drives the voice coil and the vibrating diaphragm to vibrate to offset the polarization of the vibration system;
the loudspeaker comprises a side sound outlet, the voice coil comprises a first edge close to the side sound outlet, and the wiring area comprises two polarization compensation areas which are respectively arranged on the first edge and the opposite edge of the first edge;
the circuit board comprises a first surface close to the voice coil and a second surface departing from the voice coil;
the polarization compensation area is arranged on the first surface and the second surface of the circuit board; wherein
The at least two polarization compensation regions comprise a first compensation region arranged on the first surface and a second compensation region arranged on the second surface.
2. The circuit board of claim 1, wherein the voice coil comprises two opposing first sides and two opposing second sides;
the wiring area comprises two polarization compensation areas which are respectively arranged corresponding to the two first edges or the two second edges; alternatively, the first and second electrodes may be,
the wiring area comprises two polarization compensation areas which are respectively arranged corresponding to one first edge and one second edge; alternatively, the first and second electrodes may be,
the wiring area comprises four polarization compensation areas which are respectively arranged corresponding to the two first edges and the two second edges.
3. The circuit board of claim 1, wherein a plurality of electrical connection terminals electrically connected with the external processor are arranged at the outer side end of the circuit board away from the loudspeaker; wherein the content of the first and second substances,
the vibration detection line and the vibration compensation line are connected with the electric connection terminal through the wiring of the wiring area.
4. The circuit board according to claim 1, wherein the circuit board is provided with two land portions for electrical connection with two voice coil leads of a voice coil, respectively.
5. A loudspeaker, characterized by comprising a circuit board according to any one of claims 1-4.
6. An electronic device comprising the speaker of claim 5 and a processor electrically connected to the speaker;
the processor is used for receiving the detection currents of all the vibration detection lines, processing the detection currents to obtain polarization information, and inputting the compensation current into each vibration compensation line according to the polarization information.
7. A method of speaker polarization compensation using the speaker of claim 5, comprising:
receiving detection current output by a circuit board fixed with a voice coil of a loudspeaker when the voice coil vibrates;
obtaining polarization information according to the detection currents of all the vibration detection lines;
inputting a compensation current into each vibration compensation line according to the polarization information,
the circuit board comprises a circuit board body and a wiring area arranged on the circuit board body, the wiring area comprises at least two polarization compensation areas corresponding to the voice coil, and each polarization compensation area comprises a vibration detection line and a vibration compensation line.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811107503.3A CN108882129B (en) | 2018-09-21 | 2018-09-21 | Circuit board, loudspeaker, electronic equipment and polarization compensation method |
| PCT/CN2018/122703 WO2020056961A1 (en) | 2018-09-21 | 2018-12-21 | Circuit board, speaker, electronic device, and polarization compensating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811107503.3A CN108882129B (en) | 2018-09-21 | 2018-09-21 | Circuit board, loudspeaker, electronic equipment and polarization compensation method |
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| Publication Number | Publication Date |
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| CN108882129A CN108882129A (en) | 2018-11-23 |
| CN108882129B true CN108882129B (en) | 2021-04-02 |
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| CN108882129B (en) * | 2018-09-21 | 2021-04-02 | 歌尔股份有限公司 | Circuit board, loudspeaker, electronic equipment and polarization compensation method |
| CN110662139B (en) * | 2019-09-30 | 2022-03-11 | 歌尔股份有限公司 | Sound production device and auxiliary vibration method |
| CN113132868A (en) * | 2021-04-23 | 2021-07-16 | 维沃移动通信有限公司 | Speaker, amplitude adjusting method, amplitude adjusting device, and electronic apparatus |
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| CN103563397A (en) * | 2011-05-13 | 2014-02-05 | 易音特电子株式会社 | High output micro speaker |
| CN104796828A (en) * | 2015-05-04 | 2015-07-22 | 歌尔声学股份有限公司 | Speaker module |
| CN107959914A (en) * | 2017-12-12 | 2018-04-24 | 歌尔股份有限公司 | A kind of loudspeaker module |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020056961A1 (en) | 2020-03-26 |
| CN108882129A (en) | 2018-11-23 |
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