Loudspeaker module

Abstract

A loudspeaker module includes a base, a first sound assembly, a first filter, a second sound assembly, and a second filter. The first sound assembly is disposed on the base and configured to emit a first sound. The first filter is connected to the first sound component and is configured to adjust the frequency range of the first sound. The second sound assembly is disposed on the base and configured to emit a second sound. The second filter is connected to the second sound component and is configured to adjust a phase difference between the second sound and the first sound. The first sound assembly and the second sound assembly are connected in parallel.

Description

Technical Field

[0001] This disclosure relates to a loudspeaker module, and more particularly to a loudspeaker module capable of compensating for the phase difference between low-frequency and high-frequency sounds. Background Technology

[0002] With the development of technology, many electronic devices (such as laptops) are now quite common and popular products. Among them, laptops are the most popular and widespread consumer products. Users can run various applications on laptops to achieve various purposes, such as watching videos, playing games, browsing the web, or reading e-books.

[0003] Generally, electronic devices such as laptops are equipped with speakers to produce music and other sounds. These speakers can have two or more drivers, each capable of emitting low-frequency and high-frequency sounds separately. However, due to the limited space within the laptop casing, the speaker cavity size is relatively small, which affects the quality of the low-frequency sounds produced. Furthermore, there may be a phase difference between low-frequency and high-frequency sounds when they reach the human ear, further reducing the sound output quality.

[0004] Therefore, how to design a speaker that can enhance low-frequency sound effects and overall output performance is a topic worthy of discussion and resolution. Summary of the Invention

[0005] In view of this, the purpose of this disclosure is to provide a speaker module to solve the above-mentioned problems.

[0006] This disclosure provides a speaker module including a base, a first sound component, a first filter, a second sound component, and a second filter. The first sound component is disposed on the base and configured to emit a first sound. The first filter is connected to the first sound component and configured to adjust the frequency range of the first sound. The second sound component is disposed on the base and configured to emit a second sound. The second filter is connected to the second sound component and configured to adjust a phase difference between the second sound and the first sound. The first sound component and the second sound component are connected in parallel.

[0007] According to some embodiments of this disclosure, the first sound component includes a first speaker component and a second speaker component, with the second speaker component being symmetrical to the first speaker component. The second sound component includes a third speaker component and a fourth speaker component, with the fourth speaker component being symmetrical to the third speaker component. The first speaker component and the second speaker component are arranged along a first axis, and the third speaker component and the fourth speaker component are arranged along a second axis, with the first axis perpendicular to the second axis.

[0008] According to some embodiments of this disclosure, a first filter, a first speaker assembly, and a second speaker assembly are electrically connected between a signal input node and a ground node. The first filter includes a first capacitor and a first inductor. The first inductor has a first terminal and a second terminal, the first terminal of the first inductor being coupled to the signal input node, and the second terminal of the first inductor being coupled to the first node. The first speaker assembly has a first terminal and a second terminal, the first terminal of the first speaker assembly being coupled to the first node, and the second terminal of the first speaker assembly being coupled to a second node. The second speaker assembly has a first terminal and a second terminal, the first terminal of the second speaker assembly being coupled to the second node, and the second terminal of the second speaker assembly being coupled to the ground node. The first capacitor has a first terminal and a second terminal, the first terminal of the first capacitor being coupled to the first node, and the second terminal of the first capacitor being coupled to the ground node.

[0009] According to some embodiments of this disclosure, the first filter is a low-pass filter, and a cutoff frequency of the first filter is less than or equal to 1 kHz.

[0010] According to some embodiments of this disclosure, a second filter includes a first impedance component to a fourth impedance component. The first impedance component has a first terminal and a second terminal, the first terminal of the first impedance component being coupled to a signal input node, and the second terminal of the first impedance component being coupled to a third node. A third speaker assembly has a first terminal and a second terminal, the first terminal of the third speaker assembly being coupled to a third node, and the second terminal of the third speaker assembly being coupled to a fourth node. A fourth speaker assembly has a first terminal and a second terminal, the first terminal of the fourth speaker assembly being coupled to a fourth node, and the second terminal of the fourth speaker assembly being coupled to a fifth node. A second impedance component has a first terminal and a second terminal, the first terminal of the second impedance component being coupled to a fifth node, and the second terminal of the second impedance component being coupled to a ground node. A third impedance component has a first terminal and a second terminal, the first terminal of the third impedance component being coupled to a signal input node, and the second terminal of the third impedance component being coupled to a fifth node. A fourth impedance component has a first terminal and a second terminal, the first terminal of the fourth impedance component being coupled to a third node, and the second terminal of the fourth impedance component being coupled to a ground node.

[0011] According to some embodiments of this disclosure, when the phase difference is less than 0, the first impedance component and the second impedance component are each a second inductor, and the third impedance component and the fourth impedance component are each a second capacitor. The values ​​of the second inductor and the second capacitor are obtained according to the following formulas:

[0012]

[0013] in, For the phase difference, FR ω is a reference frequency for the speaker module. m C2 is the angular frequency of the second filter, C2 is the capacitance of the second capacitor, and L2 is the inductance of the second inductor.

[0014] According to some embodiments of this disclosure, when the phase difference is greater than 0, the first impedance component and the second impedance component are each a second capacitor, and the third impedance component and the fourth impedance component are each a second inductor. The values ​​of the second inductor and the second capacitor are obtained according to the following formulas:

[0015]

[0016] in, For the phase difference, F R ω is a reference frequency for the speaker module. m C2 is the angular frequency of the second filter, C2 is the capacitance of the second capacitor, and L2 is the inductance of the second inductor.

[0017] According to some embodiments of this disclosure, the reference frequency is obtained according to the following formula:

[0018] F R =α×F LH +(1-α)×F LPF

[0019] Among them, F R For reference frequency, F LH F is a transition frequency of the speaker module. LPF Let α be the cutoff frequency of the first filter, and α be an adjustment coefficient that is greater than 0 and less than 1.

[0020] According to some embodiments of this disclosure, the excessive frequency is obtained according to the following formula:

[0021]

[0022] Among them, F L F is a first resonant frequency of the first speaker assembly and the second speaker assembly. H P is a second resonant frequency of the third and fourth speaker components. L The total power of the first speaker assembly and the second speaker assembly between the first resonant frequency and the second resonant frequency, and P H The total power of the third and fourth speaker assemblies between the first and second resonant frequencies.

[0023] According to some embodiments of this disclosure, the reference frequency is between the first resonant frequency and the cutoff frequency.

[0024] This disclosure provides a speaker module including a first sound component (a first speaker component and a second speaker component) and a second sound component (a third speaker component and a fourth speaker component). The first sound component is configured to emit a first sound, and the second sound component is configured to emit a second sound. Since the design of the casing of a portable electronic device may vary depending on user needs, the first sound emitted by the first sound component and the second sound emitted by the second sound component may have a phase difference when they reach the human ear. To improve this situation, the speaker module may further include a second filter to compensate for the aforementioned phase difference.

[0025] The second filter may include a first impedance component to a fourth impedance component. When the phase difference between the first sound and the second sound is less than 0, the first and second impedance components may each be configured as a second inductor, and the third and fourth impedance components may each be configured as a second capacitor. Conversely, when the phase difference is greater than 0, the first and second impedance components may each be configured as a second capacitor, and the third and fourth impedance components may each be configured as a second inductor.

[0026] Based on the configuration of the second filter disclosed herein, regardless of whether the phase difference between the first and second sounds is less than 0 or greater than 0, the second filter can effectively compensate for and eliminate this phase difference. Therefore, the second sound can be effectively superimposed on the first sound in the low-frequency range, thereby enhancing the low-frequency output effect and maximizing the sound heard by the user. Attached Figure Description

[0027] This disclosure will become clear from the following detailed description and accompanying illustrations. It should be emphasized that, in accordance with industry standard practice, the features are not drawn to scale and are for illustrative purposes only. In fact, the dimensions of the features may be arbitrarily enlarged or reduced for clarity.

[0028] Figure 1 This is a perspective view of a portable electronic device according to an embodiment of the present disclosure.

[0029] Figure 2 This is a perspective view of a portable electronic device according to an embodiment of the present disclosure from another angle.

[0030] Figure 3 This is a perspective view of a speaker module according to an embodiment of the present disclosure.

[0031] Figure 4 This is a perspective view of a portion of the structure of a speaker module according to an embodiment of the present disclosure.

[0032] Figure 5For a portable electronic device according to an embodiment of the present disclosure along Figure 1 A three-dimensional cross-sectional view of the midline segment AA.

[0033] Figure 6 This is a circuit diagram of a speaker module according to an embodiment of the present disclosure.

[0034] Figure 7 This is a circuit diagram of a speaker module when the phase difference between the first sound and the second sound is less than 0, according to an embodiment of the present disclosure.

[0035] Figure 8 This is a phase transition curve of a second filter according to an embodiment of the present disclosure.

[0036] Figure 9 This is a graph showing the relationship between the frequency and sound pressure level of a speaker module under different configurations according to an embodiment of the present disclosure.

[0037] Figure 10 This is a circuit diagram of a speaker module when the phase difference between the first sound and the second sound is greater than 0 according to another embodiment of the present disclosure.

[0038] Figure 11 This is a phase transition curve diagram of a second filter according to another embodiment of the present disclosure.

[0039] The attached figures are labeled as follows:

[0040] 1: Portable electronic devices

[0041] 10: Speaker Module

[0042] 11: Chassis

[0043] 12: Outer shell

[0044] 40: First Filter

[0045] 50: Base

[0046] 60: Second filter

[0047] 100: First speaker assembly

[0048] 200: Second speaker assembly

[0049] 300: Third speaker assembly

[0050] 400: Fourth speaker assembly

[0051] AX1: First axial direction

[0052] AX2: Second Axis

[0053] CP1: First capacitor

[0054] CP2: Second capacitor

[0055] CV1: Curve

[0056] CV2: Curve

[0057] CV3: Curve

[0058] CV4: Curve

[0059] CV5: Curve

[0060] D1: First Direction

[0061] D2: Second Direction

[0062] D3: Third direction

[0063] D4: Fourth Direction

[0064] LP1: First Inductor

[0065] LP2: Second Inductor

[0066] N1: First node

[0067] N2: Second node

[0068] N3: Third node

[0069] N4: Fourth Node

[0070] N5: Fifth Node

[0071] NG: Grounding node

[0072] NS: Signal Input Node

[0073] SH1: First sound outlet

[0074] SH2: Second sound outlet

[0075] SH3: Third sound output port

[0076] Z1: First impedance component

[0077] Z2: Second impedance component

[0078] Z3: Third Impedance Component

[0079] Z4: Fourth Impedance Component

[0080] X: X-axis

[0081] Y: Y-axis

[0082] Z: Z-axis Detailed Implementation

[0083] The following discloses many different implementations or examples to achieve different features of the provided objective. Specific embodiments of components and their arrangements are described below to illustrate this disclosure. Of course, these embodiments are merely illustrative and should not be construed as limiting the scope of this disclosure. For example, the specification mentions that a first feature is formed on a second feature. This may include embodiments where the first and second feature are in direct contact, or embodiments where there are other features between the first and second feature; in other words, the first and second feature are not in direct contact.

[0084] Furthermore, repeated reference numerals or designations may be used in different embodiments. These repetitions are merely for the purpose of clearly and simply describing this disclosure and do not represent a specific relationship between the different embodiments and / or structures discussed. Additionally, the formation, connection, and / or coupling to another feature component in this disclosure may include embodiments in which the feature components are formed in direct contact, and may also include embodiments in which additional feature components may be formed to insert into the aforementioned feature component, such that the aforementioned feature components may not be in direct contact. Furthermore, spatially related terms such as “vertical,” “above,” “up,” “below,” “bottom,” and similar terms (e.g., “downward,” “upward,” etc.) may be used to facilitate the description of the relationship between one component(s) or feature(s) and another component(s) or feature(s) in the illustrations. These spatially related terms are intended to cover different orientations of the device including the feature.

[0085] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which this disclosure pertains. It is understood that these terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the relevant art and the background or context of this disclosure, and should not be interpreted in an idealized or overly formal manner, unless specifically defined herein.

[0086] Furthermore, the use of ordinal numbers such as "first" and "second" in the specification and claims to modify the components of the claims does not imply or represent any prior ordinal number of the claimed component, nor does it represent the order of one claimed component with another, or the order of manufacturing methods. The use of multiple ordinal numbers is only to enable a claimed component with a certain name to be clearly distinguished from another claimed component with the same name.

[0087] Furthermore, in some embodiments of this disclosure, terms such as "connection" and "interconnection," unless specifically defined, may refer to two structures in direct contact, or they may refer to two structures that are not in direct contact, with other structures disposed between them. Moreover, these terms regarding joining and connection may also include cases where both structures are movable or both structures are fixed.

[0088] Please refer to Figures 1 to 5 . Figure 1 This is a perspective view of a portable electronic device 1 according to an embodiment of the present disclosure. Figure 2 This is a perspective view of a portable electronic device 1 according to an embodiment of the present disclosure from another angle. Figure 3 This is a perspective view of a speaker module 10 according to an embodiment of the present disclosure. Figure 4 This is a perspective view of a portion of the structure of a speaker module 10 according to an embodiment of the present disclosure, and Figure 5 For a portable electronic device 1 according to an embodiment of the present disclosure along Figure 1 A three-dimensional cross-sectional view of the midline segment AA.

[0089] In this embodiment, the portable electronic device 1 is a laptop computer with a casing 11, and two speaker modules 10 can be installed inside the casing 11, but it is not limited thereto. The two speaker modules 10 have the same structure, so the following paragraphs will only describe a single speaker module 10.

[0090] In this embodiment, as Figure 3 and Figure 4 As shown, the speaker module 10 may include a housing 12, a base 50, a first speaker assembly 100, a second speaker assembly 200, a third speaker assembly 300, and a fourth speaker assembly 400. The first speaker assembly 100 and the second speaker assembly 200 may be collectively referred to as the first sound assembly, and the third speaker assembly 300 and the fourth speaker assembly 400 may be collectively referred to as the second sound assembly.

[0091] like Figure 3 and Figure 4 As shown, the first speaker assembly 100, the second speaker assembly 200, the third speaker assembly 300, and the fourth speaker assembly 400 are mounted on the base 50, and the housing 12 is fitted over these speaker assemblies. Figure 3 As shown, the housing 12 has four openings, so that the first speaker assembly 100, the second speaker assembly 200, the third speaker assembly 300 and the fourth speaker assembly 400 emit sound in a first direction D1, a second direction D2, a third direction D3 and a fourth direction D4, respectively.

[0092] like Figure 4 As shown, the first speaker assembly 100 and the second speaker assembly 200 are arranged along a first axis AX1 (Z-axis), and the third speaker assembly 300 and the fourth speaker assembly 400 are arranged along a second axis AX2 (X-axis), and the first axis AX1 is perpendicular to the second axis AX2.

[0093] In this embodiment, the second speaker assembly 200 is symmetrical to the first speaker assembly 100, and the fourth speaker assembly 400 is symmetrical to the third speaker assembly 300. That is, the second speaker assembly 200 and the first speaker assembly 100 have the same component configuration, size, material, and parameters. Similarly, the fourth speaker assembly 400 and the third speaker assembly 300 also have the same component configuration, size, material, and parameters.

[0094] Furthermore, in this embodiment, the size of the first speaker assembly 100 is larger than the size of the third speaker assembly 300. For example, the first speaker assembly 100 has a length of 32mm and a width of 9mm, and the third speaker assembly 300 has a length of 32mm and a width of 7mm, but is not limited thereto. Based on this configuration, the speaker module 10 has a smaller height along the Z-axis, and therefore can be applied to ultra-thin laptops.

[0095] Based on the above design, when the first speaker assembly 100 and the second speaker assembly 200 receive current, since the electromagnetic driving forces driving the two diaphragms of the first speaker assembly 100 and the second speaker assembly 200 are of the same magnitude but opposite in direction, the base 50 will not be affected by the aforementioned electromagnetic driving forces. In other words, the base 50 will not move in the Z-axis when the speaker module 10 emits sound.

[0096] Similarly, when the third speaker assembly 300 and the fourth speaker assembly 400 receive current, since the electromagnetic driving forces driving the two diaphragms of the third speaker assembly 300 and the fourth speaker assembly 400 are of the same magnitude but opposite in direction, the base 50 will not be affected by the aforementioned electromagnetic driving forces. In other words, the base 50 will not move in the X-axis when the speaker module 10 emits sound.

[0097] For detailed structural design and configuration of speaker module 10 and first speaker assembly 100 to fourth speaker assembly 400, please refer to Taiwan Patent Application No. TW113125747, and therefore will not be repeated here.

[0098] Next, as Figure 1 , Figure 2 as well as Figure 5As shown, the housing 11 can have two first sound outlets SH1, two second sound outlets SH2, and two third sound outlets SH3. Sound generated by the first speaker assembly 100 can be output through the first sound outlets SH1, sound generated by the second speaker assembly 200 can be output through the second sound outlets SH2, sound generated by the fourth speaker assembly 400 can be output through the third sound outlets SH3, and sound generated by the third speaker assembly 300 can be output through both the first sound outlets SH1 and the second sound outlets SH2 (e.g.,...). Figure 5 (As indicated by the arrow in the image).

[0099] In this embodiment, the first sound component is configured to emit a first sound (i.e., the sum of the sounds emitted by the first speaker component 100 and the second speaker component 200). Specifically, the first sound component is configured to emit a low-frequency sound.

[0100] Furthermore, the second sound component is configured to emit a second sound (i.e., the sum of the sounds emitted by the third speaker component 300 and the fourth speaker component 400). Specifically, the second sound component is configured to emit a high-frequency sound.

[0101] It should be noted that since the speaker module 10 can be installed in portable electronic devices 1 of different models (e.g., different sizes or different shapes), that is, the design of the housing 11 will be different, the first sound emitted by the first sound component and the second sound emitted by the second sound component may have a phase difference when they reach the human ear.

[0102] Such a phase difference may cause the amplitudes of the first and second sounds to cancel each other out, resulting in a lower sound level for the user and failing to meet the user's needs. To improve this situation, the speaker module 10 can be further equipped with two filters to solve the above problem.

[0103] Please refer to Figure 6 , Figure 6 This is a circuit diagram of a speaker module 10 according to an embodiment of the present disclosure. In this embodiment, the first sound component and the second sound component are connected in parallel, and the speaker module 10 may further include a first filter 40 and a second filter 60.

[0104] The first filter 40 is connected to the first sound component and configured to adjust the frequency range of the first sound. For example, in this embodiment, the first filter 40 may be a low-pass filter, and a cutoff frequency of the first filter 40 may be less than or equal to 1 kHz, but is not limited thereto.

[0105] The second filter 60 is connected to the second sound component and configured to adjust a phase difference between the second sound and the first sound. For example, in this embodiment, the second filter 60 is, for instance, an all-pass filter that changes only the phase of the second sound without changing its amplitude.

[0106] like Figure 6 As shown, the first filter 40, the first speaker assembly 100 and the second speaker assembly 200 are electrically connected between a signal input node NS and a ground node NG, and the first filter 40 may include a first capacitor CP1 and a first inductor LP1.

[0107] The first inductor LP1 has a first terminal and a second terminal. The first terminal of the first inductor LP1 is coupled to the signal input node NS, and the second terminal of the first inductor LP1 is coupled to a first node N1.

[0108] The first speaker assembly 100 has a first end and a second end, the first end of the first speaker assembly 100 being coupled to a first node N1, and the second end of the first speaker assembly being coupled to a second node N2.

[0109] The second speaker assembly 200 has a first end and a second end, the first end of the second speaker assembly 200 being coupled to a second node N2, and the second end of the second speaker assembly 200 being coupled to a ground node NG.

[0110] The first capacitor CP1 has a first terminal and a second terminal. The first terminal of the first capacitor CP1 is coupled to the first node N1, and the second terminal of the first capacitor CP1 is coupled to the ground node NG.

[0111] Additionally, the second filter 60 may include a first impedance component Z1 to a fourth impedance component Z4. The first impedance component Z1 has a first terminal and a second terminal, the first terminal of the first impedance component Z1 being coupled to the signal input node NS, and the second terminal of the first impedance component Z1 being coupled to a third node N3.

[0112] The third speaker assembly 300 has a first end and a second end, the first end of the third speaker assembly 300 being coupled to a third node N3, and the second end of the third speaker assembly 300 being coupled to a fourth node N4.

[0113] The fourth speaker assembly 400 has a first end and a second end, the first end of the fourth speaker assembly 400 being coupled to a fourth node N4, and the second end of the fourth speaker assembly 400 being coupled to a fifth node N5.

[0114] The second impedance component Z2 has a first end and a second end. The first end of the second impedance component Z2 is coupled to the fifth node N5, and the second end of the second impedance component Z2 is coupled to the ground node NG.

[0115] The third impedance component Z3 has a first end and a second end. The first end of the third impedance component Z3 is coupled to the signal input node NS, and the second end of the third impedance component Z3 is coupled to the fifth node N5.

[0116] The fourth impedance component Z4 has a first end and a second end. The first end of the fourth impedance component Z4 is coupled to the third node N3, and the second end of the fourth impedance component Z4 is coupled to the ground node NG.

[0117] Please refer to the following: Figures 6 to 8 . Figure 7 This is a circuit diagram of a speaker module 10 when the phase difference between the first sound and the second sound is less than 0, according to an embodiment of the present disclosure. Figure 8 This is a phase transition curve of a second filter 60 according to an embodiment of the present disclosure. When the phase difference between the first sound and the second sound is less than 0, the first impedance component Z1 and the second impedance component Z2 can each be configured as a second inductor LP2, and the third impedance component Z3 and the fourth impedance component Z4 can each be configured as a second capacitor CP2.

[0118] Based on this configuration, the phase transition curve of the second filter 60 can be obtained, such as... Figure 8 As shown. Therefore, in order to compensate for the actual phase difference, the values ​​of the second inductor LP2 and the second capacitor CP2 in the second filter 60 can be obtained according to the following formulas (1) and (2):

[0119]

[0120] in, For the aforementioned phase difference, F R ω is a reference frequency for speaker module 10. m C2 is the angular frequency of the second filter 60, C2 is the capacitance of the second capacitor CP2, and L2 is the inductance of the second inductor LP2.

[0121] Next, the reference frequency can be further obtained according to the following formula (3):

[0122] F R =α×F LH +(1-α)×F LPF ...(3)

[0123] Where F R For the aforementioned reference frequency, F LHF is a transition frequency of speaker module 10. LPF Let α be the cutoff frequency of the first filter 40, and let α be an adjustment coefficient that is greater than 0 and less than 1. For example, in this embodiment, α may be 0.5, but is not limited thereto.

[0124] Next, the transition frequency can be obtained according to the following formula (4):

[0125]

[0126] Among them, F L F is a first resonant frequency of the first speaker assembly 100 and the second speaker assembly 200. H P is a second resonant frequency of the third speaker assembly 300 and the fourth speaker assembly 400. L The total power of the first speaker assembly 100 and the second speaker assembly 200 between the first resonant frequency and the second resonant frequency, and P H The total power of the third speaker assembly 300 and the fourth speaker assembly 400 between the first resonant frequency and the second resonant frequency.

[0127] It is worth noting that, in order to effectively superimpose the second sound onto the first sound in the low-frequency range (e.g., below 1 kHz), the reference frequency is designed between the first resonant frequency and the cutoff frequency. For example, in this embodiment, the first resonant frequency may be 400 kHz, the second resonant frequency may be 700 kHz, the cutoff frequency may be 1 kHz, and the reference frequency may be 800 Hz, but is not limited thereto.

[0128] Based on the above configuration and formulas (1) to (4), suitable and corresponding values ​​for the second capacitor CP2 and the second inductor LP2 can be obtained in the speaker module 10, which allows the second filter 60 to effectively reduce the phase difference between the first sound and the second sound. Therefore, the second sound can be effectively superimposed on the first sound in the low-frequency range, thereby improving the low-frequency output effect.

[0129] Specifically, please refer to Figure 9 . Figure 9 This is a graph showing the relationship between the frequency and sound pressure level of the speaker module 10 under different configurations according to an embodiment of this disclosure. Figure 9 In the diagram, curve CV1 represents the sound pressure level curves of the first sound output by the first speaker assembly 100 and the second speaker assembly 200 at different frequencies, and curve CV2 represents the sound pressure level curves of the first sound output by the first speaker assembly 100 and the second speaker assembly 200 after adding the first filter 40 at different frequencies.

[0130] Furthermore, curve CV3 represents the sound pressure level curves of the second sound output by the third speaker assembly 300 and the fourth speaker assembly 400 at different frequencies, curve CV4 represents the sound pressure level curves of the sound output by the speaker module 10 (including the first sound assembly and the second sound assembly) without the second filter 60 added at different frequencies, and curve CV5 represents the sound pressure level curves of the sound output by the speaker module 10 with the second filter 60 added at different frequencies.

[0131] Depend on Figure 9 As can be seen, compared to curves CV1 to CV4, curve CV5 shows a significant improvement in sound pressure level in the low-frequency range (e.g., 400Hz to 1kHz). For example, compared to curve CV4, curve CV5 can improve the sound pressure level in the low-frequency range by more than 3dB.

[0132] Therefore, based on the configuration of this disclosure, the speaker module 10 can significantly improve the sound pressure level at low frequencies, effectively improve the output effect of low-frequency sounds, and make the low-frequency output volume louder.

[0133] Please refer to the following: Figure 6 , Figure 10 and Figure 11 . Figure 10 This is a circuit diagram of a speaker module 10 when the phase difference between the first sound and the second sound is greater than 0 according to another embodiment of this disclosure. Figure 11 This is a phase transition curve of a second filter 60 according to another embodiment of the present disclosure. When the phase difference between the first sound and the second sound is greater than 0, the first impedance component Z1 and the second impedance component Z2 can each be configured as a second capacitor CP2, and the third impedance component Z3 and the fourth impedance component Z4 can each be configured as a second inductor LP2.

[0134] Based on this configuration, the phase transition curve of the second filter 60 can be obtained, such as... Figure 11 As shown. Therefore, in order to compensate for the actual phase difference, the values ​​of the second inductor LP2 and the second capacitor CP2 in the second filter 60 can be obtained according to the aforementioned formulas (1) to (4).

[0135] Similar to Figure 7 and Figure 8 In this embodiment, based on the above design and formulas (1) to (4), a suitable and corresponding second capacitor CP2 and second inductor LP2 can be obtained in the speaker module 10, which enables the second filter 60 to effectively reduce the phase difference between the first sound and the second sound. Therefore, the second sound can be effectively superimposed on the first sound in the low-frequency range, thereby improving the low-frequency output effect.

[0136] In summary, this disclosure provides a speaker module 10, including a first sound component (a first speaker component 100 and a second speaker component 200) and a second sound component (a third speaker component 300 and a fourth speaker component 400). The first sound component is configured to emit a first sound, and the second sound component is configured to emit a second sound. Since the design of the housing 11 of the portable electronic device 1 may vary depending on user needs, the first sound emitted by the first sound component and the second sound emitted by the second sound component may have a phase difference when they reach the human ear. To improve this situation, the speaker module 10 may further be provided with a second filter 60 to compensate for the aforementioned phase difference.

[0137] The second filter 60 may include a first impedance component Z1 to a fourth impedance component Z4. When the phase difference between the first sound and the second sound is less than 0, the first impedance component Z1 and the second impedance component Z2 may each be configured as a second inductor LP2, and the third impedance component Z3 and the fourth impedance component Z4 may each be configured as a second capacitor CP2. On the other hand, when the phase difference is greater than 0, the first impedance component Z1 and the second impedance component Z2 may each be configured as a second capacitor CP2, and the third impedance component Z3 and the fourth impedance component Z4 may each be configured as a second inductor LP2.

[0138] Based on the configuration of the second filter 60 disclosed herein, the second filter 60 can effectively compensate for and eliminate the phase difference between the first and second sounds, regardless of whether the phase difference is less than 0 or greater than 0. Therefore, the second sound can be effectively superimposed on the first sound in the low-frequency range, thereby enhancing the low-frequency output effect and maximizing the sound heard by the user.

[0139] In other embodiments, a control circuit may be further configured within the portable electronic device 1, and multiple second capacitors CP2 and second inductors LP2 may be provided within the speaker module 10. The control circuit can control the circuit configuration of the speaker module 10 based on user input signals or sensor sensing signals, for example, it can control the circuit of the speaker module 10 to... Figure 7 or Figure 10 The configuration is implemented to achieve the best sound output effect.

[0140] While the embodiments and advantages of this disclosure have been disclosed above, it should be understood that those skilled in the art can make modifications, substitutions, and refinements without departing from the spirit and scope of this disclosure. Furthermore, the scope of protection of this disclosure is not limited to the processes, machines, manufacturing methods, material compositions, apparatuses, methods, and steps described in the specific embodiments of the specification. Any processes, machines, manufacturing methods, material compositions, apparatuses, methods, and steps currently in development or to be developed in the future can be understood from the disclosure of this disclosure, and can be used according to this disclosure as long as they can perform substantially the same function or obtain substantially the same results in the embodiments described herein. Therefore, the scope of protection of this disclosure includes the aforementioned processes, machines, manufacturing methods, material compositions, apparatuses, methods, and steps. In addition, each claim constitutes an individual embodiment, and the scope of protection of this disclosure also includes combinations of the various claims and embodiments.

Claims

1. A speaker module, comprising: A base; and A first sound component is disposed on the base and configured to emit a first sound; A first filter, connected to the first sound component, configured to adjust the frequency range of the first sound; A second sound component, disposed on the base, configured to emit a second sound; and A second filter, connected to the second sound component, is configured to adjust a phase difference between the second sound and the first sound; in, The first sound component and the second sound component are connected in parallel.

2. The speaker module of claim 1, wherein the first sound component includes a first speaker component and a second speaker component, and the second speaker component is symmetrical to the first speaker component; The second sound component includes a third speaker component and a fourth speaker component, and the fourth speaker component is symmetrical to the third speaker component; in, The first speaker assembly and the second speaker assembly are arranged along a first axis, the third speaker assembly and the fourth speaker assembly are arranged along a second axis, and the first axis is perpendicular to the second axis.

3. The loudspeaker module of claim 2, wherein the first filter, the first loudspeaker assembly, and the second loudspeaker assembly are electrically connected between a signal input node and a ground node, and the first filter includes a first capacitor and a first inductor; The first inductor has a first terminal and a second terminal, the first terminal of the first inductor being coupled to the signal input node, and the second terminal of the first inductor being coupled to a first node; The first speaker assembly has a first end and a second end, the first end of the first speaker assembly being coupled to the first node, and the second end of the first speaker assembly being coupled to a second node; The second speaker assembly has a first end and a second end, the first end of the second speaker assembly being coupled to the second node, and the second end of the second speaker assembly being coupled to the ground node; The first capacitor has a first terminal and a second terminal, the first terminal of the first capacitor being coupled to the first node, and the second terminal of the first capacitor being coupled to the ground node.

4. The speaker module of claim 3, wherein the first filter is a low-pass filter, and a cutoff frequency of the first filter is less than or equal to 1 kHz.

5. The loudspeaker module of claim 3, wherein the second filter includes a first impedance component to a fourth impedance component; The first impedance component has a first terminal and a second terminal, the first terminal of the first impedance component is coupled to the signal input node, and the second terminal of the first impedance component is coupled to a third node. The third speaker assembly has a first end and a second end, the first end of the third speaker assembly being coupled to the third node, and the second end of the third speaker assembly being coupled to a fourth node; The fourth speaker assembly has a first end and a second end, the first end of the fourth speaker assembly being coupled to the fourth node, and the second end of the fourth speaker assembly being coupled to a fifth node. The second impedance component has a first end and a second end, the first end of the second impedance component is coupled to the fifth node, and the second end of the second impedance component is coupled to the ground node. The third impedance component has a first terminal and a second terminal, the first terminal of the third impedance component is coupled to the signal input node, and the second terminal of the third impedance component is coupled to the fifth node. The fourth impedance component has a first end and a second end, the first end of the fourth impedance component being coupled to the third node, and the second end of the fourth impedance component being coupled to the ground node.

6. The loudspeaker module of claim 5, wherein when the phase difference is less than 0, the first impedance component and the second impedance component are each a second inductor, and the third impedance component and the fourth impedance component are each a second capacitor; The values ​​of the second inductor and the second capacitor are obtained according to the following formula: in, For this phase difference, F R ω is a reference frequency for the speaker module. m C2 is the angular frequency of the second filter, C2 is the capacitance of the second capacitor, and L2 is the inductance of the second inductor.

7. The loudspeaker module of claim 5, wherein when the phase difference is greater than 0, the first impedance component and the second impedance component are each a second capacitor, and the third impedance component and the fourth impedance component are each a second inductor; in, The values ​​of the second inductor and the second capacitor are obtained according to the following formula: in, For this phase difference, F R ω is a reference frequency for the speaker module. m C2 is the angular frequency of the second filter, C2 is the capacitance of the second capacitor, and L2 is the inductance of the second inductor.

8. The loudspeaker module of claim 6 or 7, wherein the reference frequency is obtained according to the following formula: F R =α×F LH +(1-a)×F LPF in, F R For this reference frequency, F LH F is a transition frequency of the speaker module. LPF Let α be the cutoff frequency of the first filter, and α be an adjustment coefficient that is greater than 0 and less than 1.

9. The loudspeaker module of claim 8, wherein the transition frequency is obtained according to the following formula: in, F L F is a first resonant frequency of the first speaker assembly and the second speaker assembly. H P is a second resonant frequency of the third speaker assembly and the fourth speaker assembly. L The total power of the first speaker assembly and the second speaker assembly between the first resonant frequency and the second resonant frequency, and P H The total power of the third speaker assembly and the fourth speaker assembly between the first resonant frequency and the second resonant frequency.

10. The loudspeaker module of claim 9, wherein the reference frequency is between the first resonant frequency and the cutoff frequency.

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