An audio system, an audio control method and a display device

Abstract

This application discloses an audio system, an audio control method, and a display device. The audio system includes an audio processor, a driver module, and multiple speakers, which are spaced apart in the display device. Each speaker includes a first horn and a second horn. The audio processor outputs low-to-mid-frequency audio signals and mid-to-high-frequency audio signals based on the original audio signal. The first horn outputs the low-to-mid-frequency audio signals, and the second horn outputs the mid-to-high-frequency audio signals. The driver module drives the first and second horns to output corresponding audio signals. This application can optimize the uniformity of the sound field, which is beneficial to achieving a significant improvement in the overall audio effect.

Description

Technical Field

[0001] This application relates to the field of acoustic technology, specifically to a sound system, an audio control method, and a display device. Background Technology

[0002] As the demands for audiovisual experience continue to upgrade in the consumer electronics field, television equipment has gradually evolved from a single visual display terminal to a comprehensive home audio-visual center. Users' needs for television audio performance have also shifted from basic audibility to high-fidelity, immersive sound effects. Multi-channel audio systems, due to their ability to build rich sound field layers and reproduce more audio details, have gradually become one of the core configurations of mid-to-high-end television equipment.

[0003] Current TV sound systems generally adopt a single speaker unit design. Due to the trend of ultra-thin TV body design, the single speaker unit not only has the problems of small diameter and limited vibration stroke, but also has a limited volume of air that it can push, making it difficult to generate sufficient sound pressure. This results in insufficient low-frequency extension and weak high-frequency resolution, making it unable to reproduce the dynamic sound effects and details in the audio-visual content, and failing to meet users' needs for high-quality sound effects.

[0004] Therefore, the technology still needs to be improved and enhanced. Summary of the Invention

[0005] This application provides a sound system, an audio control method, and a display device, which can alleviate the problem of low sound quality in current single speaker units.

[0006] This application provides an audio system applied to a display device. The audio system includes: An audio processor is used to output low-to-mid frequency audio signals and mid-to-high frequency audio signals based on the original audio signal. Multiple speakers are spaced apart in the display device. Each speaker includes a first speaker and a second speaker. The first speaker is used to output low-to-mid frequency audio signals, and the second speaker is used to output mid-to-high frequency audio signals. The driver module is electrically connected to the audio processor, the first speaker, and the second speaker, and is used to drive the first speaker and the second speaker to output corresponding audio signals.

[0007] In some embodiments of the audio system, a plurality of speakers include a first speaker, a second speaker, and a third speaker; the first speaker, the second speaker, and the third speaker are arranged sequentially at intervals along the horizontal direction near the bottom edge of the display device.

[0008] In some embodiments of the audio system, the acoustic centers of the first speaker, the second speaker, and the third speaker are located approximately on the same horizontal line in the horizontal direction.

[0009] In some embodiments of the audio system, the driving module includes a first driving unit, a second driving unit, and a third driving unit; the first driving unit, the second driving unit, and the third driving unit are all electrically connected to the audio processor. The first driving unit is used to drive the first speaker in the first speaker box and the first speaker in the third speaker box to output corresponding audio signals respectively; the second driving unit is used to drive the first speaker in the second speaker box and the second speaker in the second speaker box to output corresponding audio signals respectively; the third driving unit is used to drive the second speaker in the first speaker box and the second speaker in the third speaker box to output corresponding audio signals respectively.

[0010] In some embodiments of the audio system, the audio system further includes a first subwoofer and a second subwoofer; the first subwoofer and the second subwoofer are disposed near the top edge of the display device; The first subwoofer enclosure contains two first subwoofers, and the second subwoofer enclosure contains two second subwoofers.

[0011] In some embodiments of the audio system, the drive module further includes a fourth drive unit and a fifth drive unit, which are electrically connected to the audio processor. The fifth drive unit is used to drive the two first woofers respectively; the fifth drive unit is used to drive the two second woofers respectively.

[0012] In some embodiments of the audio system, the audio system further includes a first surround speaker and a second surround speaker, the first surround speaker being disposed on the left side near the display device, and the second surround speaker being disposed on the right side of the display device opposite to the left side.

[0013] In some embodiments of the audio system, the driving module further includes a sixth driving unit, which is connected to the audio processor and is used to drive the first surround speaker and the second surround speaker to output corresponding audio signals.

[0014] This application also provides an audio control method, which is applied to the above-mentioned audio system. The audio control method includes the following steps: Output low-to-mid frequency audio signals and mid-to-high frequency audio signals based on the original audio signal; The first and second speakers are driven to output corresponding audio signals based on the low-to-mid frequency audio signals and the high-to-mid frequency audio signals.

[0015] This application also provides a display device, which includes the aforementioned audio system.

[0016] This application provides an audio system, audio control method, and display device. The audio system, by configuring a dual-speaker structure with crossover adaptation for each speaker and combining the professional crossover of the audio processor with the independent driving of the driver module, enables each speaker to operate only in its own optimal acoustic frequency band. This alleviates the problems of insufficient mid-high frequency resolution and limited low-frequency extension that easily occur when a single speaker emits sound across the entire frequency range. It also enables accurate reproduction and seamless connection of mid-low frequency audio signals and mid-high frequency audio signals, effectively improving the fidelity, layering, and clarity of audio signals. At the same time, the spatial layout design of multiple speakers further optimizes the uniformity of the sound field, ultimately contributing to a significant improvement in the overall audio effect. Attached Figure Description

[0017] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0018] Figure 1 This is a first structural block diagram of an audio system provided in an embodiment of this application.

[0019] Figure 2 This is a schematic diagram of the structure of a speaker in an audio system provided in an embodiment of this application.

[0020] Figure 3 This is a schematic diagram showing the layout of the first speaker, the second speaker, and the third speaker in the audio system provided in the embodiments of this application.

[0021] Figure 4 This is a second structural block diagram of an audio system provided in an embodiment of this application.

[0022] Figure 5 This is a schematic diagram showing the layout of the first subwoofer and the second subwoofer in an audio system provided in an embodiment of this application.

[0023] Figure 6 This is a third structural block diagram of the audio system provided in the embodiments of this application.

[0024] Figure 7 This is a schematic diagram showing the layout of the first surround speaker and the second surround speaker in an audio system provided in an embodiment of this application.

[0025] Figure 8 This is a fourth structural block diagram of the audio system provided in the embodiments of this application.

[0026] Figure 9 This is a flowchart illustrating an audio control method provided in an embodiment of this application. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Features thus defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0029] Please refer to the following: Figure 1 , Figure 2 and Figure 3 This application provides an audio system applied in a display device 10. The audio system includes an audio processor 21, a driver module 22, and multiple speakers 23. The multiple speakers are spaced apart in the display device 10, and each speaker includes a first speaker 231 and a second speaker 232. The driver module 22 is electrically connected to the audio processor 21, each first speaker 231, and each second speaker 232.

[0030] The audio processor 21 is used to output low-frequency audio signals and mid-high-frequency audio signals based on the original audio signal; the first speaker 231 is used to output low-frequency audio signals, and the second speaker 232 is used to output mid-high-frequency audio signals; the driving module 22 is used to drive the first speaker 231 and the second speaker 232 to output corresponding audio signals.

[0031] Specifically, the audio processor 21 performs frequency division processing on the input raw audio signal to separate the appropriate low-frequency audio signal and mid-high frequency audio signal; the driver module 22 receives the two audio signals after frequency division and independently drives the first speaker 231 and the second speaker 232 in a single speaker to synchronously output the corresponding low-frequency and mid-high frequency audio signals. Compared with the traditional single-speaker sound generation structure, this application configures a dual-speaker structure with frequency division adaptation for a single speaker. Combined with the professional frequency division of the audio processor 21 and the independent drive of the driver module 22, different speakers operate only in their own optimal acoustic frequency band. This not only alleviates the problems of insufficient mid-high frequency resolution and limited low-frequency extension that are prone to occur when a single speaker emits sound across the entire frequency range, but also achieves accurate reproduction and seamless connection of low-frequency and mid-high frequency audio signals, effectively improving the fidelity, layering and clarity of the audio signal. At the same time, with the spatial layout design of multiple speakers, the uniformity of the sound field is further optimized, which is conducive to achieving a significant improvement in the overall audio effect.

[0032] Please continue reading. Figure 2 In one embodiment, the speaker includes a housing 301, which encloses a sound cavity 302. A first speaker 231 and a second speaker 232 are both disposed inside the sound cavity 302, sharing the same cavity. This embodiment utilizes a single housing 301 to enclose the same sound cavity 302 and integrate dual speakers. This simplifies the overall speaker structure, adapts to the ultra-thin body layout of the display device 10, and enables acoustic coupling of the sound waves emitted by the dual speakers within the same sound cavity 302, improving the frequency band coordination between low-frequency and mid-high-frequency signals.

[0033] Please continue reading. Figure 3 In some embodiments, the multiple speakers include a first speaker 23A, a second speaker 23B, and a third speaker 23C. The first speaker 23A, the second speaker 23B, and the third speaker 23C are arranged sequentially and spaced apart along the horizontal direction near the bottom edge of the display device 10. The second speaker 23B is located at the bottom edge of the display device 10 and near the center of the display device 10. The first speaker 23A and the third speaker 23C are located on the left and right sides of the second speaker 23B, respectively. The acoustic centers of the first speaker 23A, the second speaker 23B, and the third speaker 23C are approximately aligned on the same horizontal line. This ensures the spatial uniformity of the sound signals emitted by the multiple speakers, reduces sound wave interference, and optimizes the symmetry and consistency of the mid-to-high frequency sound field.

[0034] Please see Figure 4 In some embodiments, the driving module 22 includes a first driving unit 221, a second driving unit 222, and a third driving unit 223; the first driving unit 221, the second driving unit 222, and the third driving unit 223 are all electrically connected to the audio processor 21.

[0035] The first driving unit 221 is used to drive the first speaker 231 in the first speaker 23A and the first speaker 231 in the third speaker 23C to output corresponding audio signals respectively; the second driving unit 222 is used to drive the first speaker 231 in the second speaker 23B and the second speaker 232 in the second speaker 23B to output corresponding audio signals respectively; and the third driving unit 223 is used to drive the second speaker 232 in the first speaker 23A and the second speaker 232 in the third speaker 23C to output corresponding audio signals respectively.

[0036] Specifically, the first driving unit 221 synchronously drives the first speaker 231 of the first speaker 23A and the first speaker 231 of the third speaker 23C, enabling them to synchronously output corresponding low-to-mid frequency audio signals. The second driving unit 222 synchronously drives the second speaker 232 of the first speaker 23A and the second speaker 232 of the third speaker 23C, enabling them to synchronously output corresponding high-to-mid frequency audio signals. The third driving unit 223 independently drives the first speaker 231 and the second speaker 232 of the second speaker 23B, enabling them to output corresponding low-to-mid frequency audio signals and high-to-mid frequency audio signals, respectively. By using a differentiated driving design that uniformly drives the speakers of the same frequency band in different speakers and independently drives the dual speakers of the center speaker (i.e., the second speaker 23B), synchronous sounding of audio signals of the same frequency band and independent output of signals of different frequency bands are achieved. This effectively alleviates crosstalk between frequency bands and timing deviations when multiple speakers sound simultaneously, reduces mutual interference between audio signals, and thus effectively improves the consistency of the sound field and the clarity of audio reproduction.

[0037] Please see Figure 5 In some embodiments, the audio system further includes a first subwoofer 24A and a second subwoofer 24B; the first subwoofer 24A and the second subwoofer 24B are spaced apart horizontally; the first subwoofer 24A and the second subwoofer 24B are located near the top edge of the display device 10. The first subwoofer 24A contains two first woofers 241, and the second subwoofer 24B contains two second woofers 242. The two first woofers 241 and the two second woofers 242 are spaced apart horizontally. In this embodiment, by placing two subwoofers near the top of the display device 10, each containing two woofers, the low-frequency sound pressure level is increased while achieving spatially uniform radiation of low-frequency sound waves, which helps reduce low-frequency sound wave interference.

[0038] As one embodiment, the first subwoofer 24A and the second subwoofer 24B can be symmetrically arranged relative to the vertical central axis of the display device 10. In this embodiment, the symmetrical layout of the dual subwoofers, combined with the horizontal spacing design of the dual subwoofers inside the enclosures, not only enhances the low-frequency sound pressure output capability but also improves the uniform horizontal radiation of low-frequency sound waves. At the same time, it forms an upper and lower sound field echo with the symmetrically arranged speakers near the bottom of the display device 10, further reducing full-frequency sound wave interference and optimizing the spatial symmetry and uniformity of the sound field.

[0039] Please see Figure 6In some embodiments, the driving module 22 further includes a fourth driving unit 224 and a fifth driving unit 225, which are electrically connected to the audio processor 21. The fifth driving unit 225 is used to drive two first woofers 241 and two second woofers 242 respectively. In this embodiment, the independent driving unit drives the woofers in each subwoofer enclosure, which is beneficial to the power matching of the woofers and thus improves the output synchronization and stability of the bass signal.

[0040] Please see Figure 7 In some embodiments, the audio system further includes a first surround speaker 251 and a second surround speaker 252. The first surround speaker 251 is disposed on the left side near the display device 10, and the second surround speaker 252 is disposed on the right side of the display device 10 opposite to the left side. The first surround speaker 251 and the second surround speaker 252 are spaced apart along the horizontal direction, and they can be arranged approximately symmetrically with respect to the vertical central axis of the display device 10.

[0041] In this embodiment, by distributing the first surround speaker 251 and the second surround speaker 252 to the left and right sides of the display device 10, a nearly symmetrical surround sound point can be constructed on both sides of the display device 10. This allows the surround audio signal to radiate uniformly in the horizontal direction, effectively widening the lateral coverage of the sound field and significantly enhancing the listener's perception of sound space and immersion. Simultaneously, this symmetrical spacing, along with the symmetrical design of the subwoofer near the top and the three speakers near the bottom of the display device 10, forms a fully symmetrical acoustic layout for the entire audio system. This improves the uniformity of the full-frequency audio signal superposition in space and reduces sound wave interference when speakers are emitting sound from different positions. Furthermore, the horizontally spaced arrangement provides reasonable acoustic radiation space for the surround speakers, reducing the near-distance superposition distortion between the surround audio signal and the audio signal from the bottom speaker. This optimizes the sound field layering and fidelity of the entire audio system, achieving synergistic enhancement between the main channel audio and the surround channel audio, and significantly improving the overall immersive listening experience.

[0042] Please see Figure 8 In some embodiments, the driving module 22 further includes a sixth driving unit 226, which is connected to the audio processor 21. The sixth driving unit 226 is used to drive the first surround speaker 251 and the second surround speaker 252 to output corresponding audio signals. In this embodiment, the sixth driving unit 226 is used to drive the first surround speaker 251 and the second surround speaker 252 to synchronously output corresponding surround audio signals. By synchronously driving the two surround speakers with a single driving unit, the consistency and synchronicity of their audio signal outputs are improved, the problem of surround sound field offset and distortion is alleviated, and the spatial immersion of the surround sound is optimized.

[0043] As one embodiment, each driving unit in the driving module 22 includes a power amplifier, which amplifies the processed audio signal to a power signal suitable for the speaker load. Each power amplifier drives two speakers respectively to achieve audio output for the corresponding channel. Optional power amplifier models include the TAS5805, which features a wide power input range, high efficiency, low distortion, and low EMI. It integrates audio signal processing functions and a closed-loop feedback structure, enabling power amplification of the audio signal and optimization of audio output sound quality through built-in equalization and dynamic range control units, while suppressing signal distortion caused by power fluctuations and load changes, making it suitable for multi-channel audio driving scenarios. Of course, power amplifiers with the same functions can be selected in other embodiments, and this application does not limit this choice.

[0044] Please see Figure 9 This application provides an audio control method, which is applied to the aforementioned audio system. The audio control method includes the following steps: S100: Outputs low-frequency and mid-high-frequency audio signals based on the original audio signal; S200: Drive the first and second speakers to output corresponding audio signals based on the low-frequency and mid-high-frequency audio signals.

[0045] The audio control method in this embodiment divides the original audio signal into two frequency-matched signals: a low-to-mid frequency signal and a high-to-mid frequency signal. The output audio processor then divides the original audio signal to separate the low-to-mid frequency signal from the high-to-mid frequency signal. Based on these two frequency-matched signals, the first and second speakers in a single speaker enclosure are driven independently to synchronously output the corresponding low-to-mid frequency and high-to-mid frequency audio signals, thus achieving dual-speaker drive. Compared to traditional single-speaker drive, this application obtains audio signals suitable for two speakers through frequency division, allowing each speaker to operate only in its optimal acoustic frequency band. This alleviates problems such as insufficient mid-to-high frequency resolution and limited low-frequency extension that often occur with single-speaker full-frequency output. It also achieves accurate reproduction and seamless integration of the low-to-mid frequency and high-to-mid frequency audio signals, effectively improving the fidelity, layering, and clarity of the audio signal, ultimately leading to a significant improvement in overall audio quality.

[0046] In a dual-speaker structure within a single-speaker enclosure, even when sharing a single acoustic cavity, a physical distance still exists between the acoustic centers of the two speakers. When the operating frequency increases to a certain level, the sound waves emitted by the two speakers will experience a phase difference in space, triggering a comb filtering effect and causing peak-and-valley distortion in the frequency response curve. Therefore, this application calculates the crossover point by referencing the distance between the two speakers during the crossover process. Taking the first and second speakers in the first enclosure as an example, the distance d between the first and second speakers in the first enclosure is obtained; this distance d represents the acoustic center distance between the two speakers. Then, the crossover point is calculated based on this distance, such as using the formula Fmax = C / 2d (C = 343 m / s) to obtain the critical interference frequency of the two speakers, which is then used as the crossover point. Finally, the inductance value L = R / 2πFmax of the crossover is calculated based on Fmax (where R is the speaker impedance) to ensure that each speaker operates only within a safe frequency band.

[0047] If the center-to-center distance between the two speakers in the first speaker enclosure is d = 0.08m, and the speaker impedance is R = 4Ω; frequency calculation: Fmax = 343 / (2 × 0.08) ≈ 2144Hz, corresponding inductance value: L = 4 / (2π × 2144) ≈ 0.294mH. This means that the crossover point of the speaker enclosure should be set at approximately 2144Hz, and an inductor of approximately 0.294mH should be used to achieve frequency band separation, thereby alleviating the interference problem between the two speakers in the high-frequency range.

[0048] In the above embodiments, frequency division is achieved through inductive frequency division. Inductive frequency division refers to connecting passive components such as inductors in series in the speaker drive circuit. By utilizing the impedance difference of the inductor to signals of different frequencies, signals of a certain frequency band are blocked, allowing only signals of the target frequency band to pass through the speaker, thereby achieving passive frequency division. It has a simple structure and low cost.

[0049] Of course, in other embodiments, electronic crossover can also be used to achieve frequency division. Electronic crossover refers to separating signals of different frequency bands through digital signal processing or analog circuits before amplifying the audio signal, and then driving the corresponding speakers through the corresponding power amplifiers. Electronic crossover allows for precise setting of the crossover point, crossover slope, and phase compensation, resulting in higher crossover accuracy, more flexible control, and better adaptation to the acoustic interference characteristics caused by the spacing between the two speakers.

[0050] This application also discloses a display device, which includes the aforementioned audio system. If this audio system is applied to a television set, the display device can be a television set. Accordingly, the display device includes a television set body, wherein the audio system is integrated with the television set body. Each speaker, horn, and driver module of the audio system is installed to fit the structural layout of the television set body, thereby achieving frequency division driving of audio signals and multi-channel sound output, improving the audio output effect of the display device.

[0051] The speaker system layout (top subwoofer, bottom speaker, and side surround speakers) is roughly aligned with the TV screen area, resulting in better spatial positioning of the sound and better matching of the picture content, thus enhancing the immersive audiovisual experience. The crossover design based on speaker spacing mitigates high-frequency interference caused by the small spacing between the built-in speakers in ultra-thin TVs. The speaker system in this embodiment improves sound quality within a limited space, meeting high-quality audiovisual needs without the need for additional external speakers. Since the speaker system has been described in detail above, it will not be repeated here.

[0052] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0053] The audio system provided in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A sound system, characterized in that, The audio system is used in the display device, and the audio system includes: An audio processor is configured to output low-to-mid frequency audio signals and mid-to-high frequency audio signals based on the original audio signal. Multiple speakers are spaced apart in the display device. Each speaker includes a first speaker and a second speaker. The first speaker is used to output the low-to-mid frequency audio signal, and the second speaker is used to output the mid-to-high frequency audio signal. The driving module is electrically connected to the audio processor, the first speaker, and the second speaker, respectively, and is used to drive the first speaker and the second speaker to output corresponding audio signals.

2. The audio system according to claim 1, characterized in that, The plurality of speakers include a first speaker, a second speaker, and a third speaker; the first speaker, the second speaker, and the third speaker are arranged sequentially at intervals along the horizontal direction near the bottom edge of the display device.

3. The audio system according to claim 2, characterized in that, The acoustic centers of the first speaker, the second speaker, and the third speaker are approximately located on the same horizontal line in the horizontal direction.

4. The audio system according to claim 2, characterized in that, The driving module includes a first driving unit, a second driving unit, and a third driving unit; the first driving unit, the second driving unit, and the third driving unit are all electrically connected to the audio processor. The first driving unit is used to drive the first speaker in the first speaker box and the first speaker in the third speaker box to output corresponding audio signals respectively; the second driving unit is used to drive the first speaker in the second speaker box and the second speaker in the second speaker box to output corresponding audio signals respectively; the third driving unit is used to drive the second speaker in the first speaker box and the second speaker in the third speaker box to output corresponding audio signals respectively.

5. The audio system according to claim 1, characterized in that, The audio system further includes a first subwoofer and a second subwoofer; the first subwoofer and the second subwoofer are disposed near the top edge of the display device; The first subwoofer enclosure has two first subwoofers, and the second subwoofer enclosure has two second subwoofers.

6. The audio system according to claim 5, characterized in that, The driving module further includes a fourth driving unit and a fifth driving unit, which are electrically connected to the audio processor respectively. The fifth driving unit is used to drive the two first woofers respectively; the fifth driving unit is used to drive the two second woofers respectively.

7. The audio system according to claim 1, characterized in that, The audio system also includes a first surround speaker and a second surround speaker, the first surround speaker being located on the left side near the display device, and the second surround speaker being located on the right side of the display device opposite to the left side.

8. The audio system according to claim 7, characterized in that, The driving module further includes a sixth driving unit, which is connected to the audio processor and is used to drive the first surround speaker and the second surround speaker to output corresponding audio signals respectively.

9. An audio control method, characterized in that, The audio control method is applied to the audio system as described in any one of claims 1-8, and the audio control method includes the following steps: Output low-to-mid frequency audio signals and mid-to-high frequency audio signals based on the original audio signal; The first speaker and the second speaker are driven to output corresponding audio signals based on the low-frequency audio signals and the high-frequency audio signals.

10. A display device, characterized in that, The display device includes the audio system as described in any one of claims 1-8.

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