Display apparatus and control method thereof

Abstract

The application relates to the technical field of display devices, and provides a display device and a control method thereof. The display device comprises a display, a first loudspeaker array comprising a first loudspeaker and a second loudspeaker, the first loudspeaker comprising a plurality of full-frequency units, and a processor. The processor is configured to: when the frequency of an audio signal is in a first preset frequency range, output a driving signal to the first loudspeaker and the second loudspeaker, the time delay of the plurality of full-frequency units in the first loudspeaker being the same; and when the frequency of the audio signal is in a second preset frequency range, output independent driving signals to the plurality of full-frequency units of the first loudspeaker, the time delay of the plurality of full-frequency units being different. Without changing the physical spacing of the loudspeakers, the requirements of low-frequency directivity and high-frequency directivity are considered, the problem that the sound field expansion effect is not ideal due to the limitation of high-frequency directivity in the related art is solved, the sound field expansion effect of the full-frequency band is realized, and the immersive experience of a user is improved.

Description

Technical Field

[0001] This application relates to the field of display device technology, and in particular to a display device and its control method. Background Technology

[0002] As people's demand for audiovisual entertainment continues to increase, the sound quality requirements for display devices such as televisions are also rising. The mainstream solution for the sound design of display devices is to adopt a multi-channel design, which widens the sound field by adding speakers to the side of the display device.

[0003] However, current TV designs are generally ineffective, resulting in limited sound field width and making it difficult to create an immersive audio experience for users. Summary of the Invention

[0004] This application provides a display device and its control method to solve the technical problem that the limited sound field width of the display device makes it difficult to create an immersive sound experience for users.

[0005] In a first aspect, some embodiments provide a display device, including: a display; a first speaker array, the first speaker array including a first speaker and a second speaker, the first speaker comprising a plurality of full-range units; The processor is communicatively connected to the first speaker array and configured to acquire an audio signal to be played; and when the frequency of the audio signal is within a first preset frequency range, output a drive signal to the first speaker and the second speaker to make the first speaker and the second speaker produce sound, wherein the delay of the multiple full-range units in the first speaker is the same; and when the frequency of the audio signal is within a second preset frequency range, output an independent drive signal to the multiple full-range units of the first speaker respectively to make the first speaker produce sound, wherein the delay of the multiple full-range units in the first speaker is different.

[0006] As can be seen from the above technical solution, the first speaker array includes a first speaker and a second speaker. The first speaker contains multiple full-range units, and the processor adopts a frequency-band control strategy based on this. Specifically, within a first preset frequency range, the first and second speakers emit sound together, and the multiple units in the first speaker have the same delay, thus forming low-frequency beam directivity. Within a second preset frequency range, only the first speaker emits sound, and the delays of the multiple full-range units in the first speaker are different, causing each unit to emit sound sequentially according to a preset delay difference, thus forming high-frequency beam directivity. Therefore, without changing the physical spacing of the speakers or increasing hardware costs, the requirements for both low-frequency and high-frequency directivity are met, solving the problem of unsatisfactory sound field expansion caused by limited high-frequency directivity in related technologies, achieving a full-frequency sound field expansion effect, thereby improving the user's immersive experience.

[0007] Secondly, these embodiments also provide a control method for a display device, applied to the display device provided in the first aspect, the display device comprising: The display; a first speaker array, the first speaker array including a first speaker and a second speaker, the first speaker including multiple full-range units; and a processor, the processor being communicatively connected to the first speaker array; The method includes: acquiring the audio signal to be played; When the frequency of the audio signal is within the first preset frequency range, a drive signal is output to the first speaker and the second speaker to make the first speaker and the second speaker produce sound, and the delay of multiple full-range units in the first speaker is the same; When the frequency of the audio signal is within the second preset frequency range, independent drive signals are output to the multiple full-range units of the first speaker to make the first speaker produce sound. The delays of the multiple full-range units in the first speaker are different.

[0008] As can be seen from the above method, by adopting a frequency band control strategy, within the first preset frequency range, the first and second speakers emit sound together, and the multiple units in the first speaker have the same delay, thus forming low-frequency beam directivity; within the second preset frequency range, only the first speaker emits sound, and the delays of the multiple full-range units in the first speaker are different, so that each unit emits sound sequentially according to the preset delay difference, thus forming high-frequency beam directivity. Therefore, without changing the physical spacing of the speakers or increasing hardware costs, the requirements for both low-frequency and high-frequency directivity are met, solving the problem of unsatisfactory sound field expansion caused by limited high-frequency directivity in related technologies, achieving a full-frequency sound field expansion effect, thereby improving the user's immersive experience. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram illustrating an operational scenario between a display device and a control device provided in some embodiments of this application; Figure 2 Provided for some embodiments of this application Figure 1 Hardware configuration block diagram of the display device; Figure 3 This is a schematic diagram of the software configuration of a display device provided in some embodiments of this application; Figure 4This is a schematic diagram illustrating an application scenario of the solution in an embodiment of this application; Figure 5 Schematic diagram of a display device provided in an embodiment of this application Figure 1 ; Figure 6 Schematic diagram of a display device provided in an embodiment of this application Figure 2 ; Figure 7 Schematic diagram of a display device provided in an embodiment of this application Figure 3 ; Figure 8 A flowchart illustrating a control method for a display device provided in an embodiment of this application. Figure 1 ; Figure 9 Schematic diagram of a display device provided in an embodiment of this application Figure 4 ; Figure 10 Schematic diagram of a display device provided in an embodiment of this application Figure 5 ; Figure 11 Schematic diagram of a display device provided in an embodiment of this application Figure 6 ; Figure 12 Schematic diagram of a display device provided in an embodiment of this application Figure 7 ; Figure 13 A flowchart illustrating a control method for a display device provided in an embodiment of this application. Figure 2 ; Figure 14 Schematic diagram of a display device provided in an embodiment of this application Figure 8 ; Figure 15 Schematic diagram of a display device provided in an embodiment of this application Figure 9 ; Figure 16 Schematic diagram of a display device provided in an embodiment of this application Figure 10 ; Figure 17 A flowchart illustrating a control method for a display device provided in an embodiment of this application. Figure 3 ; Figure 18 Schematic diagram of a display device provided in an embodiment of this application Figure 10 one; Figure 19 A flowchart illustrating a control method for a display device provided in an embodiment of this application. Figure 4 . Detailed Implementation

[0011] The embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples of systems and methods consistent with some aspects of this application as detailed in the claims.

[0012] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0013] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.

[0014] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0015] The term "module" refers to any known or subsequently developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and / or software code that is capable of performing the functions associated with that element.

[0016] Figure 1 This is a schematic diagram illustrating an operational scenario between a display device and a control device provided in some embodiments of this application. For example... Figure 1 As shown, users can operate the display device 200 via touch operation, mobile terminal 300, and control device 100. For example, control device 100 can be a remote control, stylus, gamepad, etc.

[0017] In some embodiments, display device 200 generally refers to a device with screen display and data processing capabilities. For example, display device 200 includes, but is not limited to, smart TVs, mobile terminals, computers, monitors, advertising screens, wearable devices, virtual reality devices, augmented reality devices, etc.

[0018] The mobile terminal 300 can function as a control device for human-computer interaction between the user and the display device 200. It can also function as a communication device for establishing a communication connection with the display device 200 and exchanging data. In some embodiments, the mobile terminal 300 can have software applications installed on it and communicate with the display device 200 via network communication protocols to achieve one-to-one control and data communication. Furthermore, it can transmit audio and video content displayed on the mobile terminal 300 to the display device 200 for synchronized display.

[0019] In some embodiments, the display device 200 can also be controlled in ways other than the control device 100 and the mobile terminal 300. For example, it can be controlled by directly receiving the user's voice commands through a module configured inside the display device 200 for acquiring voice commands, or it can be controlled by receiving the user's voice commands through a voice control device set outside the display device 200.

[0020] like Figure 1 The diagram also shows that the display device 200 communicates with the server 400 via various communication methods. The display device 200 can communicate via a local area network (LAN), a wireless local area network (WLAN), and other networks. The server 400 can provide various content and interactive features to the display device 200. The server 400 can be a cluster or multiple clusters, and may include one or more types of servers.

[0021] In some embodiments, the display device 200 may provide broadcast television reception functionality, and may also provide intelligent network television functionality with computer support, including but not limited to network television, smart television, Internet Protocol television (IPTV), etc.

[0022] Figure 2 Provided for some embodiments of this application Figure 1 Hardware configuration block diagram of display device 200.

[0023] In some embodiments, the display device 200 may include at least one of a tuner 210, a communication device 220, a detector 230, a device interface 240, a controller 250, a display 260, an audio output device 270, a memory, a power supply, and a user input interface.

[0024] In some embodiments, the controller includes a central processing unit, a video processor, an audio processor, a graphics processor, RAM, ROM, and a first to an nth interface for input / output.

[0025] In some embodiments, the tuner 210 receives broadcast television signals via wired or wireless reception and demodulates audio and video signals, such as EPG data signals, from a plurality of wireless or wired broadcast television signals.

[0026] In some embodiments, the communicator 220 is a component used to communicate with external devices or servers according to various communication protocol types. For example, the communicator may include at least one of a Wi-Fi module, a Bluetooth module, a wired Ethernet module, other network communication protocol chips or near-field communication protocol chips, and an infrared receiver. The display device 200 can establish the transmission and reception of control signals and data signals with the control device 100 or the server 400 through the communicator 220.

[0027] In some embodiments, detector 230 is used to acquire signals from the external environment or to interact with the outside world. For example, detector 230 includes a light receiver, a sensor for acquiring ambient light intensity; or, detector 230 includes an image acquisition device, such as a camera, which can be used to acquire external environmental scenes, user attributes, or user interaction gestures; or, detector 230 includes a sound acquisition device, such as a microphone, for receiving external sounds.

[0028] In some embodiments, the display 260 includes display function components for presenting images and driving components for driving image display. The display 260 is used to receive and display image signals output from the controller 250. For example, the display 260 can be used to display video content, image content, menu control interface components, and user control UI interfaces, etc.

[0029] In some embodiments, the display 260 may be at least one of a liquid crystal display, an OLED display, and a projection display, and may also be a projection device and a projection screen.

[0030] In some embodiments, the communication device 220 is a component used to communicate with external devices or the server 400 according to various communication protocol types. The display device 200 may have multiple communication devices 220 depending on the supported communication methods. For example, when the display device 200 supports wireless network communication, it may have a communication device 220 with WiFi functionality. When the display device 200 supports Bluetooth connectivity, it needs to have a communication device 220 with Bluetooth functionality.

[0031] The communication device 220 enables the display device 200 to communicate with external devices or the server 400 via wireless or wired connections. Wired connections utilize data cables, interfaces, or other components to connect the display device 200 to external devices. Wireless connections utilize wireless signals or wireless networks. The display device 200 can directly establish a connection with external devices or indirectly through gateways, routers, or other connection devices.

[0032] In some embodiments, the controller 250 may include at least one of a central processing unit, a video processor, an audio processor, a graphics processor, and a power processor, and a first to an nth interface for input / output. The controller 250 controls the operation of the display device and responds to user operations through various software control programs stored in memory. The controller 250 controls the overall operation of the display device 200.

[0033] In some embodiments, the controller 250 and the tuner 210 may be located in different separate devices, that is, the tuner 210 may also be located in an external device of the main device where the controller 250 is located, such as an external set-top box.

[0034] In some embodiments, a user can input user commands through a graphical user interface (GUI) displayed on a display 260, and the user input interface receives user input commands through the graphical user interface (GUI).

[0035] In some embodiments, the user input interface 280 can be used to receive instructions from user input.

[0036] In some embodiments, the display device 200 may run an operating system to enable user interaction. An operating system is a computer program that manages and controls the hardware and software resources of the display device 200. The operating system can (control the display device) provide a user interface, allowing users to interact with the display device 200 and supporting the running of various applications.

[0037] It should be noted that the operating system can be a native operating system based on a specific operating platform, a third-party operating system that is deeply customized based on a specific operating platform, or an independent operating system specifically developed for display devices.

[0038] An operating system can be divided into different modules or levels based on the functions it implements, for example... Figure 3As shown, in some embodiments, the system is divided into four layers, from top to bottom: the Applications layer (referred to as the "Application Layer"), the Application Framework layer (referred to as the "Framework Layer"), the System Library layer, and the Kernel layer.

[0039] In some embodiments, the application layer provides services and interfaces for applications, enabling the display device 200 to run applications and interact with the user based on the applications. The application layer may contain at least one application, which may be a built-in Windows program, system settings program, or clock program of the operating system; or it may be an application developed by a third-party developer. In specific implementations, the application packages in the application layer are not limited to the examples above.

[0040] The framework layer provides application programming interfaces (APIs) and a programming framework for applications. The application framework layer includes predefined functions. It acts as a central processing unit, determining the actions taken by applications within the application layer. Through the API, applications can access system resources and obtain system services during execution.

[0041] Figure 3 This is a schematic diagram illustrating the software configuration of a display device provided in some embodiments of this application. For example... Figure 3 As shown, in some embodiments, the application framework layer includes a view system, managers, and content providers. The view system designs and implements the application's interface and interactions, and includes lists, grids, text boxes, buttons, etc. Managers include at least one of the following modules: an Activity Manager for interacting with all running activities in the system; a Location Manager for providing system services or applications with access to system location services; a Package Manager for retrieving various information related to application packages currently installed on the device; a Notification Manager for controlling the display and clearing of notification messages; and a Window Manager for managing icons, windows, toolbars, wallpapers, and desktop widgets on the user interface.

[0042] In some embodiments, the Activity Manager manages the lifecycle of individual applications and common navigation and back functions, such as controlling application exit, opening, and back actions. The Window Manager manages all window programs, such as obtaining the screen size, determining if a status bar is present, locking the screen, capturing the screen, and controlling changes to the display window, such as shrinking the display window, shaking the display, or distorting the display.

[0043] In some embodiments, the system runtime library layer can provide support for the framework layer. When the framework layer is used, the operating system runs the instruction library contained in the system runtime library layer, such as the C / C++ instruction library, to implement the functions to be performed by the framework layer.

[0044] In some embodiments, the kernel layer is a functional layer situated between the hardware and software of the display device 200. The kernel layer can implement functions such as hardware abstraction, multitasking, and memory management. For example, ... Figure 3 As shown, hardware drivers can be configured in the kernel layer. The kernel layer can contain at least one of the following drivers: audio driver, display driver, Bluetooth driver, camera driver, WIFI driver, USB driver, HDMI driver, sensor driver (such as fingerprint sensor, temperature sensor, pressure sensor, etc.), and power driver, etc.

[0045] It should be noted that the above examples are merely a simple division of operating system functions and do not limit the specific form of the operating system of the display device 200 in some embodiments. Depending on the functions of the display device, the type of operating system, and other factors, the number of layers and the specific type of layers contained in the operating system can be expressed in other forms.

[0046] Loudspeaker arrays are widely used in stadiums, large exhibition halls, and other similar settings. By arranging multiple loudspeaker units in an array, they utilize the principle of sound wave interference to form directional beams, effectively controlling the coverage area of ​​the sound field. This technology has achieved good results in large-space, long-distance sound reinforcement scenarios.

[0047] However, current speaker arrays are used in large venues for sound reinforcement. Their large unit spacing limits high-frequency directivity, and the audience's location is relatively wide; only uniform loudness within the coverage area is needed, without requiring sound field adaptation for specific listening positions. Therefore, current speaker arrays are difficult to apply to the sound field expansion problems in television scenarios, specifically as follows: First, the effective frequency limit of a speaker array is limited by the spacing between the speaker units; the higher the upper frequency limit, the smaller the required speaker spacing. However, the physical size of a television set is limited, making it impossible to reduce the spacing between units or increase the number of units indefinitely. Therefore, under the limited space constraints of a television, overcoming the physical bottleneck of its limited high-frequency directivity is the primary challenge faced by the inventors.

[0048] Secondly, the total length of the speaker array determines the lower limit frequency of low-frequency directivity, while the spacing between the speakers determines the upper limit frequency of high-frequency directivity. However, the total length of the speaker array is limited by the physical size of the television and cannot be arbitrarily increased; the speaker spacing is limited by the total length of the speaker array and the number of units, and cannot be optimized independently. Therefore, how to balance the requirements of the total length of the speaker array for low-frequency directivity and the requirements of the speaker spacing for high-frequency directivity is another challenge faced by the inventors.

[0049] Third, referring to point two, if the upper limit of high-frequency directivity is increased by reducing the speaker spacing, the number of speakers needs to be increased within a fixed array length, which leads to an increase in the number of amplifier channels and system complexity, resulting in a sharp increase in hardware costs. Therefore, how to overcome the physical limitation of speaker spacing on the upper limit of high-frequency directivity without increasing costs is another challenge faced by the inventors.

[0050] In view of this, a display device and its control method are provided. The first speaker array of the display device includes a first speaker and a second speaker, and the first speaker contains multiple full-range units. This structure allows the first speaker itself to constitute a sub-array, where multiple units can either synchronously emit sound equivalent to a large speaker or emit sound independently to form independent beams. The effective upper frequency limit of this sub-array is determined by the spacing between the full-range units in the first speaker, while the effective lower frequency limit is still determined by the total length of the entire first speaker array. Thus, the large array ensures a sufficiently low lower frequency limit in the low-frequency range, while the sub-array ensures a sufficiently high upper frequency limit in the high-frequency range. This eliminates the need to indefinitely increase the total array length to lower the low-frequency lower limit (constrained by television size) or to indefinitely reduce the unit spacing, increase the number of units and power amplifier channels to raise the high-frequency upper limit (constrained by cost and power consumption). Within relevant size and cost constraints, the frequency range is expanded, enabling the speaker array solution to be applied to widen the sound field of a television and improve the user experience.

[0051] Based on the aforementioned hardware architecture, the processor is configured to perform frequency-band differentiated processing on the audio signal. Specifically, when the frequency of the audio signal is within a first preset frequency range, the processor outputs drive signals to both the first and second speakers, causing both speakers to emit sound simultaneously. Furthermore, the processor controls the delay of multiple full-range units within the first speaker to be identical. At this point, the multiple full-range units inside the first speaker vibrate synchronously with the same phase and amplitude, effectively functioning as a single large-diameter speaker, forming a complete linear array of low-frequency beam directivity together with the second speaker. This process fully utilizes the total array length, ensuring a sufficiently low lower limit for low-frequency directivity. The synchronous vibration of all full-range units is equivalent to a single speaker, eliminating the need to increase the total array length to lower the low-frequency directivity lower limit and reducing hardware costs. Stable low-frequency beam directivity is achieved through the collaborative work of multiple full-range units within the first speaker, enhancing the immersive experience in low-frequency scenes.

[0052] When the frequency of the audio signal is within the second preset frequency range, the processor outputs drive signals only to the multiple full-range units of the first speaker and stops outputting drive signals to the second speaker. Based on this, the processor controls the delay of the multiple full-range units in the first speaker to be different. At this time, each unit emits sound sequentially according to the preset delay difference, and the sound waves emitted by each unit superimpose in space to form a directional beam. Since only the first speaker emits sound at this time, and the sound is emitted by multiple full-range units within a single speaker, the effective aperture is reduced, avoiding the problem of a reduced upper frequency limit in the high-frequency range caused by large spacing in a full array. Simultaneously, the physical spacing between the units within the first speaker is smaller than the spacing between speakers. This method does not change the physical spacing of the speakers, nor does it require increasing the number of speakers or amplifier channels. Instead, the sub-array formed through delay control has an effective upper frequency limit far greater than the upper frequency limit in related technologies, further enhancing the user's immersive experience.

[0053] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0054] First, let's explain the application scenarios involved in this application: Figure 4 This is a schematic diagram illustrating an application scenario of the solution in an embodiment of this application. For example... Figure 4As shown, in some embodiments, a front speaker array is used to achieve this. This involves multiple speaker units forming a directional beam in the horizontal direction, creating a virtual sound image from outside the screen through sound wave interference and wall reflection, thus simulating a surround sound field and achieving a sound field extension effect without the need for surround speakers. It should be noted that... Figure 4 The example shown uses two speaker arrays, located on the left and right sides of the lower edge of the display device. However, in actual applications, there are no restrictions on the number or position of speaker arrays in the display device.

[0055] In some embodiments, a display device is provided, including one or more first speaker arrays. In one example, the display device has one first speaker array. The first speaker array may be located at the lower edge of the display device, or at the upper edge of the display device; the first speaker array may be located to the left of the edge (upper or lower edge) of the display device, to the right of the edge (upper or lower edge) of the display device, or at the middle of the edge (upper or lower edge) of the display device. Figure 5 Schematic diagram of a display device provided in an embodiment of this application Figure 1 .like Figure 5 As shown ( Figure 5 Taking the first speaker array located at the middle of the lower edge of the display device as an example, the speaker array includes multiple speakers arranged sequentially along the horizontal direction of the display device (L1~L5 are shown as examples in the figure).

[0056] In another example, the display device may also include two first speaker arrays. For instance, the two first speaker arrays in the display device may be a left channel speaker array and a right channel speaker array. The left channel speaker array is located in the left side region of the display device, and the right channel speaker array is located in the right side region of the display device. Optionally, the first speaker arrays may be located at the upper edge or the lower edge of the display. Figure 6 Schematic diagram of a display device provided in an embodiment of this application Figure 2 .like Figure 6 As shown, the speaker array of the display device includes a first speaker array consisting of a left channel speaker array and a right channel speaker array. Figure 6Taking an example where the left and right channel speaker arrays are located at the bottom edge of the display, the left and right channel speaker arrays are symmetrically arranged on the left and right sides of the display device. The left channel speaker array includes multiple speakers arranged sequentially along the horizontal direction of the display device, and the right channel speaker array also includes multiple speakers arranged sequentially along the horizontal direction of the display device. The number of speakers in the left and right channel speaker arrays can be the same or different. For example, the left channel speaker array may include L speakers arranged sequentially along the horizontal direction of the display device (L1~L5 are shown as examples in the figure), and the right channel speaker array may include R speakers arranged sequentially along the horizontal direction of the display device (R1~R5 are shown as examples in the figure).

[0057] In other examples, the display device may also include other numbers of first speaker arrays, such as 3 first speaker arrays (e.g., left channel speaker array, center channel speaker array, and right channel speaker array, respectively located in the left, central, and right areas of the display), 4 first speaker arrays (e.g., 2 first speaker arrays are provided at the top and bottom edges of the display, with the 2 first speaker arrays at each edge located on the left and right sides of the edge), or 5 speaker arrays (e.g., 2 first speaker arrays are provided at the top edge of the display, located on the left and right sides of the top edge, and 3 first speaker arrays are provided at the bottom edge, located on the left, middle, and right sides of the bottom edge).

[0058] Taking a display device that includes two first speaker arrays as an example (such as a left channel speaker array and a right channel speaker array respectively), each of the left channel speaker array and the right channel speaker array contains multiple speakers arranged in the horizontal direction. Each speaker can be independently controlled to produce sound, thereby forming a directional sound wave beam through beamforming technology, so that the sound forms a wider sound field in the horizontal direction than the screen, or the sound wave beam is directed to a specific listening area to enhance the user's immersion.

[0059] In some embodiments, the display device employs a 5.1.2-channel or 4.1.2-channel audio scheme, wherein only the surround channel signals are processed using an array beamforming algorithm to achieve sound field expansion while avoiding the problem of unfocused sound images from the first speaker array. Taking the left surround channel as an example, its signal processing method is as follows: After decoding the multi-channel signal, the TV's main chip outputs independent left surround channel and right surround channel signals. The processor (e.g., a digital signal processor (DSP)) acquires the left surround channel signal and divides it into P equal parts (where P is the number of speakers in the left channel speaker array, e.g., P=5). Each part of the signal is independently delayed and then sequentially input to the power amplifiers corresponding to L1~LP. After power amplification, the corresponding speakers are driven to produce sound. Based on the principle of sound wave interference, the sound beam formed by L1~LP will be deflected at a certain angle relative to the direction of the TV, depending on the delay applied by the DSP to each signal, thus achieving directional control of the left surround channel signal.

[0060] Similarly, for the right surround channel signal, the digital signal processor divides the signal into Q parts (Q is the number of speakers in the right channel speaker array, for example, Q=5). Each part of the signal is independently delayed and assigned a value, and then input to the power amplifiers corresponding to R1~RQ in sequence, so that the right channel speaker array forms a directional right surround sound beam.

[0061] Through the above methods, this embodiment utilizes independent beamforming control of the surround sound channel signals, enabling the surround sound to have clear directionality and effectively expanding the sound field width. Simultaneously, the left and right main channel signals are still played by their respective main channel speakers (e.g., dedicated main channel speakers located in the center or on both sides of the display device) in a traditional point-source manner, avoiding excessive separation of the main channel signals that could lead to unfocused sound images. This enhances the immersive experience of the surround sound while maintaining the stability and focus of the main channel sound images.

[0062] This application embodiment further provides a display device. Figure 7 Schematic diagram of a display device provided in an embodiment of this application Figure 3 .like Figure 7 As shown, the display device includes a display, a first speaker array, and a processor (not shown in the figure). The processor may be, for example, the controller described in the above embodiments, an audio processor within the controller, or a DSP.

[0063] In some embodiments, the first speaker array includes a first speaker and a second speaker, the first speaker comprising a plurality of full-range units; the second speaker comprising one or more full-range units.

[0064] refer to Figure 7 The first speaker array includes L speakers arranged sequentially along the horizontal direction of the display. Figure 7(Using loudspeakers L1 and L2 as examples), the L loudspeakers include first loudspeakers and second loudspeakers, where L is an integer greater than or equal to 2. There is no limitation on the number of first loudspeakers and second loudspeakers. In one example, the first loudspeaker array may include one or more first loudspeakers, for example, the first array loudspeakers may include 1, 2, or 3 first loudspeakers; or, the first loudspeaker array may include one or more second loudspeakers, for example, the first array loudspeakers may include 1, 2, or 3 second loudspeakers. It should be understood that... Figure 7 The example shown is a first loudspeaker array comprising a first loudspeaker L1 and a second loudspeaker L2, with each of the first loudspeaker L1 and the second loudspeaker L2 comprising four full-range units.

[0065] In some embodiments, the first speaker can be any one or more speakers in a speaker array that include multiple full-range units. For example, the first speaker can be a speaker in a first speaker array located near the edge of the display device, and the remaining speakers are second speakers (such as...). Figure 7 In this configuration, only speaker L1 is the first speaker, and the remaining speakers are second speakers. Alternatively, the first speaker could be the speaker located in the middle of the first speaker array, and the remaining speakers could be second speakers (e.g.,...). Figure 7 (Among them, only speaker L2 is the first speaker, and the other speakers are the second speakers).

[0066] As can be seen from the above technical solutions, by placing the first speaker in the first speaker array near the edge of the display device, the beams of multiple full-range units inside the edge speaker can radiate directly to the outside of the display device, effectively utilizing sidewall reflections to enhance the surround sound effect, while avoiding interference with the voice positioning of the center channel. This expands the sound field width while ensuring the clarity and stability of the sound image, thereby improving the user's immersive listening experience. In some embodiments, the number of speakers in the first speaker array (i.e., the value of L) is not limited. For example, taking the first speaker array as a left channel speaker array, the number of speakers in the left channel speaker array can be 4. In this case, the left channel speaker array includes speakers L1, L2, L3, and L4 arranged sequentially along the horizontal direction. Speaker L1 is located near the left edge of the display, and the rest are arranged sequentially along the horizontal direction of the display device at a preset distance. Taking the first speaker array as a right channel speaker array, speaker R1 is located near the right edge of the display, and the rest are arranged sequentially along the horizontal direction of the display device at a preset distance.

[0067] For example, the number of speakers in the first speaker array can be 5. In this case, the first speaker array includes 5 speakers arranged in sequence along the horizontal direction.

[0068] In some alternative embodiments, the spacing between adjacent speakers is equal. For example, the center-to-center spacing between adjacent speakers can be set to 60 mm.

[0069] In some alternative embodiments, the spacing between adjacent speakers is different. For example, the center-to-center spacing between adjacent speakers can be non-equal along the horizontal direction, satisfying d1 < d2 < ... < dN-1, where d1 is the spacing between two adjacent speakers on the side closer to the edge of the display device, and dN-1 is the spacing between two adjacent speakers on the side farther from the edge of the display device.

[0070] As can be seen from the above technical solutions, this application does not specifically limit the number L of speakers in the first speaker array, that is, the first speaker array can contain any reasonable number of full-range speakers, such as L=4 or L=5. Through flexible configuration of the number of speakers, adaptive adjustments can be made according to different display device sizes, cost budgets, and acoustic performance requirements. Specifically, the more speakers there are, the longer the total array length, the lower the lower limit frequency of the low-frequency beam directivity, and the wider the sound field coverage; the fewer speakers there are, the lower the system cost and power consumption. The lack of limitation on the value of L gives the technical solution of this application good scalability and applicability, enabling it to adapt to display devices of different sizes and product requirements of different positioning, further enhancing the flexibility and application value of the solution.

[0071] In some embodiments, the first loudspeaker includes two, three, or four full-range units; the second loudspeaker includes one, two, three, or four full-range units.

[0072] For example, taking the first loudspeaker as L1, the first loudspeaker L1 includes N full-range units arranged sequentially along the horizontal direction. The value of N is not limited; for example, N can be 2, 3, or 4. As another example, taking the second loudspeaker as L2, L3, L4, or L5, any one of the second loudspeakers L2, L3, L4, or L5 can include M full-range units arranged sequentially along the horizontal direction. The value of M is not limited; for example, M can be 1, 2, 3, or 4.

[0073] As can be seen from the above technical solutions, by flexibly configuring the number of full-range units in each speaker, adaptive design can be carried out according to different product positioning, cost budget and acoustic performance requirements, so that the technical solution of this application can be adapted to the needs of different display devices, further enhancing the flexibility and application value of the solution.

[0074] In some other embodiments, for each loudspeaker, the first and last full-range units are located at the left and right ends of the loudspeaker, respectively. Taking a loudspeaker array length of approximately 250 mm as an example, the center-to-center distance between adjacent full-range units is d (e.g., d = 60 mm).

[0075] In some embodiments, the spacing between adjacent full-range units of adjacent speakers is also equal to d, meaning that all full-range units in the entire full-range subarray are arranged at equal intervals along the horizontal direction. For example, please refer to... Figure 7 The full-range unit 4 in speaker L1 and the full-range unit 1 in speaker L2 are adjacent full-range units between adjacent speakers, and the distance between the full-range unit 4 in speaker L1 and the full-range unit 1 in speaker L2 is also d.

[0076] It should be noted that, Figure 7 The example shown is based on the first speaker L1 and the second speaker L2 in the left channel speaker array, with each speaker L1 and the second speaker L2 including 4 full-range units. The right channel speaker array is mirrored with reference to the setting of the left channel speaker array (not shown in the figure), and there are no limitations for actual applications.

[0077] In some embodiments, a method for controlling a display device is provided, wherein a processor is configured to acquire an audio signal to be played. For ease of explanation, an example is given with L=4, N=4, and the first speaker being L1. Figure 8 A flowchart illustrating a control method for a display device provided in an embodiment of this application. Figure 1 .like Figure 8 As shown, the processor is configured to perform the following steps: S101, acquire the audio signal to be played.

[0078] Specifically, the processor can obtain the audio signal to be played from the audio source of the display device (such as an HDMI interface, network module, USB interface, or built-in memory). The audio signal can be a surround sound audio signal. That is, the technical solution provided in this application can be applied to sound field expansion in surround sound scenes.

[0079] Furthermore, the processor samples and digitizes the acquired audio signal to identify its frequency magnitude.

[0080] S102, when the frequency of the audio signal is within the first preset frequency range, output a drive signal to the first speaker and the second speaker so that the first speaker and the second speaker produce sound.

[0081] Specifically, the processor determines the frequency range of the audio signal. For ease of explanation, we will use L1 (containing 4 full-range units) as the first speaker and L2, L3, and L4 (each containing 4 full-range units) as the second speakers as an example. When the processor determines that the frequency of the audio signal is within a first preset frequency range, the processor outputs drive signals to all full-range units of all speakers in the first speaker array (i.e., the first speaker L1 and the second speakers L2, L3, and L4). The delay of each full-range unit in the first speaker is the same (and the delay of each full-range unit in each of the second speakers is also the same). Specifically, the drive signals output by the processor to the four full-range units of L1 have the same delay (e.g., all 0 μs), meaning that the four full-range units of L1 emit sound synchronously. Simultaneously, the drive signals output by the processor to the four full-range units of L2, L3, and L4 also have the same delay. Therefore, the four full-range units inside the first loudspeaker vibrate in unison with the same phase and amplitude, effectively functioning as a large-diameter loudspeaker, and together with the second loudspeaker, forming a mid-to-low frequency beam directivity. Furthermore, the time delay between each full-range unit is zero, ensuring that the sound waves are in phase in the far field, avoiding the sound pressure drop caused by phase cancellation.

[0082] S103, when the frequency of the audio signal is within the second preset frequency range, output independent driving signals to the multiple full-range units of the first full-range speaker in the first full-range sub-array, so as to make the first full-range speaker produce sound.

[0083] Specifically, when the processor determines that the frequency of the audio signal is within a second preset frequency range, the processor outputs independent drive signals to each of the multiple full-range units of the first speaker, causing the first speaker to produce sound. Simultaneously, the processor stops outputting drive signals to the second speaker. Furthermore, within the second preset frequency range, the delays of the multiple full-range units in the first speaker are different. Specifically, the processor applies different delay amounts to the drive signals of the multiple full-range units of the first speaker using a digital signal processor. For example, taking a first speaker comprising four full-range units: The delay of the first full-frequency unit is 0 μs; The delay of the second full-frequency unit is 10μs; The delay of the third full-frequency unit is 20μs; The delay of the fourth full-frequency unit is 30μs.

[0084] In this way, each full-frequency unit can emit sound sequentially with different delay amounts. According to the principle of sound wave interference, the sound waves emitted by multiple full-frequency units form a directional beam in space, and the direction of this beam is determined by the delay difference between each unit. By adjusting the magnitude of the delay difference, the deflection angle of the beam can be controlled, thereby achieving dynamic adjustment of the beam directivity in the mid-to-high frequency band.

[0085] In some embodiments, in the first speaker array, each full-range unit in the first speaker is individually controlled by a different power amplifier unit; each full-range unit in the second speaker is controlled by the same power amplifier unit. It should be noted that if the second speaker includes multiple full-range units, then the multiple full-range units in the second speaker are controlled by the same power amplifier unit; if the second speaker includes only one full-range unit (or the second speaker itself constitutes a full-range unit), then the second speaker is controlled by one power amplifier unit. The first speaker is the speaker in the first speaker array located near the edge of the display; for example, in the left channel speaker array, the first speaker is L1, and in the right channel speaker array, the first speaker is R1.

[0086] As can be seen from the above technical solutions, each full-range unit in the first loudspeaker is controlled by a different power amplifier unit, so that within the second preset frequency range, the driving signal of each full-range unit can be independently configured to have different delays and power coefficients, thereby achieving precise beam directivity control; each full-range unit in the second loudspeaker is controlled by the same power amplifier unit, and multiple full-range units inside receive the same driving signal and emit sound synchronously. While ensuring the low-frequency sound pressure level and array continuity, the number of power amplifier channels is greatly reduced, thereby reducing system cost and hardware complexity.

[0087] Figure 9 Schematic diagram of a display device provided in an embodiment of this application Figure 4 .like Figure 9 As shown, when the processor determines that the frequency of the audio signal is within the second preset frequency range, the processor outputs N independent drive signals to each of the N full-range units of the first speaker to make the first speaker produce sound. Taking N=4 as an example, the processor outputs four independent drive signals to each of the four full-range units of the first speaker. At the same time, the processor stops outputting drive signals to the other speakers (L2, L3, L4).

[0088] In some embodiments, the processor includes a DSP and multiple power amplifier units. Figure 10 Schematic diagram of a display device provided in an embodiment of this application Figure 5 , Figure 11 Schematic diagram of a display device provided in an embodiment of this application Figure 6 .like Figure 10 and Figure 11As shown, taking the first loudspeaker as L1, which includes four full-range units, as an example, the four full-range units in the first loudspeaker L1 are controlled by power amplifier units AMP1-1, AMP1-2, AMP2-1, and AMP2-2, respectively. Taking the second loudspeakers as L2 and L3, each including four full-range units, as an example, the four full-range units in L2 are all controlled by AMP3-1, and the four full-range units in L3 are all controlled by AMP3-21. It should be understood that the control methods for the remaining second loudspeakers in the first loudspeaker array are similar to those for L2 and L3, and will not be elaborated here.

[0089] In some embodiments, multiple power amplifier units within the same loudspeaker can share a single signal channel, while the power amplifier units of different loudspeakers are controlled by different signal channels. For example, the DSP is connected to AMP1-1, AMP1-2, AMP2-1, and AMP2-2 of L1 through a first signal channel to output a first drive signal; it is connected to AMP3-1 of L2 through a second signal channel to output a second drive signal; and it is connected to AMP3-2 of L3 through a third signal channel to output a third drive signal.

[0090] refer to Figure 10 The DSP is connected to each power amplifier unit via an independent signal channel, and each power amplifier unit is controlled by an independent drive signal. This method is suitable for scenarios where different delay parameters need to be applied to each full-range unit, such as when the frequency of the audio signal is within a second preset frequency range. In this case, the DSP needs to control the four full-range units of L1 to form a directional sub-array beam. Specifically, the DSP is connected to AMP1-1, AMP1-2, AMP2-1, and AMP2-2 via four independent signal channels, each transmitting an independent drive signal. That is, the DSP outputs a first drive signal to AMP1-1, a second drive signal to AMP1-2, a third drive signal to AMP2-1, and a fourth drive signal to AMP2-2. Each drive signal independently controls the corresponding power amplifier unit. The power amplifier unit amplifies the received drive signal and then drives the connected full-range unit to produce sound. Taking the second loudspeakers, L2 and L3, as an example, the full-range units of L2 are controlled by power amplifier unit AMP3-1, and the full-range units of L3 are controlled by power amplifier unit AMP3-2. The DSP is connected to AMP3-1 and AMP3-2 through independent signal channels, and outputs one drive signal to AMP3-1. After being amplified by AMP3-1, this signal simultaneously drives the full-range units of L2 to produce sound; and outputs another drive signal to AMP3-2. After being amplified by AMP3-2, this signal simultaneously drives the full-range units of L3 to produce sound.

[0091] As can be seen from the above technology, the DSP can output drive signals with different delays and power coefficients through each independent channel, which can achieve precise beam directivity control; at the same time, each signal channel is independent of each other and does not interfere with each other, ensuring the flexibility and reliability of system control, thereby further improving the sound field expansion effect.

[0092] refer to Figure 11 The DSP outputs the same drive signal to multiple power amplifier units simultaneously through a single signal channel, with the multiple power amplifier units sharing this single drive signal. This method is suitable for scenarios requiring synchronized sound output from all full-range units, such as when the audio signal frequency is within a first preset frequency range. In this case, the delay and power coefficient of each full-range unit are the same, eliminating the need for independent control. Specifically, the DSP is connected to AMP1-1, AMP1-2, AMP2-1, and AMP2-2 through an independent signal channel, outputting the same drive signal through this channel. For example, taking the full-range units in the first full-range loudspeaker L1, controlled by power amplifier units AMP1-1, AMP1-2, AMP2-1, and AMP2-2 respectively, the DSP outputs a single drive signal through a single signal channel, which is simultaneously transmitted to all four power amplifier units (AMP1-1, AMP1-2, AMP2-1, and AMP2-2). Each power amplifier unit receives the same drive signal (i.e., with the same phase, amplitude, and delay), which, after being amplified by its respective power amplifier, drives the corresponding full-range unit to produce sound. Thus, the four full-range units of the first full-range loudspeaker L1 vibrate synchronously with the same phase and the same amplitude, which is equivalent to the operation of a large-diameter loudspeaker.

[0093] As can be seen from the above technical solutions, the DSP outputs the same driving signal to multiple power amplifier units simultaneously through a single signal channel. Multiple power amplifier units share one driving signal, enabling multiple full-frequency units to receive the same driving signal and emit sound synchronously with the same phase and amplitude. This satisfies the requirement that all full-frequency units have the same delay and work together within the first preset frequency range. At the same time, it reduces the number of DSP signal channels and the complexity of the circuit, thereby reducing system cost and hardware design difficulty.

[0094] In some embodiments, simultaneous configurations can be set on the same display device. Figure 10 and Figure 11The system offers two connection methods: both independent signal channel connections and shared signal channel connections between the DSP and the power amplifier units. The processor can select the appropriate connection method and drive mode based on the frequency range of the audio signal. Specifically, when the audio signal frequency is within a first preset frequency range, the DSP uses a shared signal channel, simultaneously outputting the same drive signal to multiple power amplifier units through a single signal channel. This ensures that all full-range units have the same delay and synchronized sound output, meeting the requirements for low-frequency collaborative operation. When the audio signal frequency is within a second preset frequency range, the DSP switches to an independent signal channel mode, outputting independent drive signals to each power amplifier unit through multiple independent signal channels. This gives each full-range unit different delay parameters, meeting the requirements for high-frequency beam directivity control. Through the flexible configuration and switching of these two connection methods, system resources and costs are optimized while ensuring the accuracy of low-frequency sound pressure level and high-frequency directivity control.

[0095] In some embodiments, the upper limit frequency of the second preset frequency range is greater than or equal to the lower limit frequency of the first preset frequency range. It should be noted that the specific values ​​of the first and second preset frequency ranges are not limited in this application embodiment; they may partially overlap or not overlap. For example, the lower limit frequency of the second preset frequency range may be greater than the lower limit frequency of the first preset frequency range and less than the upper limit frequency of the first preset frequency range, meaning the two frequency ranges have an overlapping area; or, the lower limit frequency of the second preset frequency range may be equal to the upper limit frequency of the first preset frequency range, meaning the two frequency ranges are continuous on the frequency axis without crossing. By flexibly configuring the coverage relationship of the two frequency ranges, frequency band allocation can be optimized under different product design requirements, balancing system complexity and sound field expansion performance. For example, the first preset frequency range is 170Hz to 680Hz, and the upper limit frequency of the second preset frequency range can be greater than 170Hz. For example, taking a distance of 60mm between each full-range unit as an example, the upper limit frequency of the second preset frequency range Fmax = c / 2 * 0.06 = 2.8KHz, where c is the speed of light. That is, in this example, the second preset frequency range can be any frequency range from 170Hz to 2.8KHz. For example, the second preset frequency range can be from 170Hz to 2.8KHz or it can be from 680Hz to 2.8KHz.

[0096] In some embodiments, when the frequency of the audio signal is within a first preset frequency range, S102 is executed; when the frequency of the audio signal is within a second preset frequency range, S103 is executed. Through the above scheme, the processor adopts a frequency-band control strategy based on the hardware architecture. Specifically, within the first preset frequency range, the first speaker and the second speaker emit sound together, and the multiple units in the first speaker have the same delay, thereby forming low-frequency beam directivity; within the second preset frequency range, only the first speaker emits sound, and the delays of the multiple full-range units in the first speaker are different, causing each unit to emit sound sequentially according to a preset delay difference, thereby forming high-frequency beam directivity. Thus, without changing the physical spacing of the speakers or increasing hardware costs, the requirements for both low-frequency and high-frequency directivity are considered, solving the problem of unsatisfactory sound field expansion caused by limited high-frequency directivity in related technologies, achieving a full-band sound field expansion effect, thereby improving the user's immersive experience.

[0097] Furthermore, the audio signal is a surround sound audio signal. By employing different delay control strategies for multiple full-range units in the first speaker at different frequency ranges, this application can form stable beam directivity in the low-to-mid frequency range and the high-frequency range, respectively. This allows the surround sound signal to break through the physical width limitation of the front speaker array and form a wider virtual sound field in the horizontal direction, enhancing the sense of immersion and surround sound, thereby improving the user's movie-watching experience.

[0098] In some embodiments, a display device is provided. The beam of a first speaker array is directed in a first direction, which faces outwards from the display device, and the angle between this first direction and the normal direction of the display device is a first preset angle, which is greater than 0 degrees and less than 90 degrees. It should be understood that the first speaker array can be located on the left or right side of the display device. When the first speaker array is located on the left side of the display device (i.e., the first speaker array is a left channel speaker), the first direction faces outwards from the left side of the display device; when the first speaker array is located on the right side of the display device (i.e., the first speaker array is a right channel speaker), the first direction faces outwards from the right side of the display device. That is, regardless of which side the first speaker array is located on, its beam is directed outwards from that side, so that sound waves radiate outwards from the display device. By setting the beam direction of the first speaker array to face outwards from the display device and deviate from the normal direction, sound waves radiate outwards from the display device at a certain angle, physically expanding the horizontal coverage of the sound field, allowing viewers to experience a sound field wider than the physical size of the screen, thus enhancing immersion.

[0099] Figure 12 Schematic diagram of a display device provided in an embodiment of this application Figure 7 .like Figure 12As shown, the first speaker array in this display device is illustrated using a left-channel speaker array and a right-channel speaker array as examples. The beam of the left-channel speaker array points in a first direction, which faces the left outer side of the display device, and the angle between this direction and the normal direction of the display device is a first preset angle 'a'. The beam of the right-channel speaker array points in the first direction, which faces the right outer side of the display, and the angle between this direction and the normal direction of the display is a first preset angle 'b'. The first preset angle is greater than 0° and less than 90°. For example, the first preset angle can be any angle between 0° and 90°, or it can be any angle between 15° and 75°, or it can be any angle between 30° and 60°. For example, the first preset angle can be 15°, 30°, 45°, 50°, 60°, 75°, 80°, or 90°, etc.

[0100] In some embodiments, the first preset angles corresponding to the first speaker arrays at different positions may be the same. For example, the beams of the left channel speaker array and the right channel speaker array are respectively directed towards the left and right sides of the display at a 45° deviation from the normal (i.e., the first preset angle a and the first preset angle b are the same, which is 45°).

[0101] In other embodiments, the first preset angle corresponding to the first speaker array at different positions can be different. For example, the left channel speaker array is oriented 30° off the normal, and the right channel speaker array is oriented 50° off the normal (i.e., the first preset angle a is 30° and the first preset angle b is 50°), to adapt to scenarios where the display device is placed asymmetrically in the room (e.g., when the display device is placed to one side of a corner). By using the asymmetrical left and right deflection angles, the center of the sound field is aligned with the center of the audience area.

[0102] As can be seen from the above technical solution, the beam of the first speaker array points to the first direction, which is towards the outside of the display device, and the angle between the first direction and the normal direction of the display device is a first preset angle (greater than 0° and less than 90°), so that the sound wave radiates to the side and front at a certain angle, which widens the horizontal coverage range of the first speaker sound field, forms a wider sound field coverage, and enhances the user's immersive listening experience.

[0103] It should be noted that, Figure 12 The deflection structure shown can be based on Figure 5 , Figure 6 , Figure 7 , Figure 9 , Figure 10 or Figure 11 The design is based on any of the structures shown in the above figures, specifically, the speaker array layout, with the beam of the first speaker array set to point at a predetermined angle away from the normal direction. In one example, using... Figure 6 For example, the first loudspeaker array includes a left channel loudspeaker array and a right channel loudspeaker array, each of which includes multiple loudspeakers arranged sequentially along a horizontal direction. Based on this, such as... Figure 12 As shown, the beam pointing of the left channel speaker array can be set to point in a direction deviating from the normal by a first preset angle 'a', and the beam pointing of the right channel speaker array can be set to point entirely in a direction deviating from the normal by a first preset angle 'b'. In this case, the beams of multiple speakers in the left channel speaker array point to the left side of the display device, and the beams of multiple speakers in the right channel speaker array point to the right side of the display device. Through the above settings, even with beam pointing deviation, the sound output of the first speaker array can be further controlled according to the frequency of the audio signal. This retains the wide sound field coverage advantage brought by beam pointing deviation while overcoming its high-frequency directivity deficiency, thereby improving the sound field coverage and enhancing the user experience. In some embodiments, a display device is provided, which further includes a detector. Figure 13 A flowchart illustrating a control method for a display device provided in an embodiment of this application. Figure 2 .like Figure 13 As shown, it includes the following steps: S201, The detector detects the audience area within a preset angle range in front of the display device.

[0104] The preset angle range is divided into at least two sound-producing zones.

[0105] Furthermore, the detector can send the detection results to the processor. These detection results include at least one of the following: the number of audience members, the position of each audience member relative to the display device, the center position of the audience area, and the sound-emitting area marker where the center position falls. The detection results may include parameters such as the azimuth angle, distance, or coordinates corresponding to the aforementioned positions.

[0106] S202, the processor determines the center position of the audience area.

[0107] Specifically, the processor receives the detection results sent by the detector and determines the center position of the audience area based on the detection results. When a single audience member is detected, the processor uses that audience member's position as the center position of the audience area (single-person mode). When multiple audience members are detected, the processor uses the midpoint between two audience members at the edge as the center position of the audience area (multi-person mode). Optionally, the processor determines the positions of the audience member on the left and right based on the azimuth information of each audience member, and takes the midpoint of the line connecting the two as the center position of the audience area.

[0108] S203, the processor acquires the audio signal to be played.

[0109] S204, the processor determines the sound-emitting area where the center position is located as the target sound-emitting area, and determines the target beam combination corresponding to the target sound-emitting area from multiple beam directions corresponding to at least one speaker array, so as to control at least one speaker array to emit sound based on the target beam combination.

[0110] Next, combine Figure 14 The above steps will be explained in detail. Figure 14 Schematic diagram of a display device provided in an embodiment of this application Figure 8 .like Figure 14 As shown, the detector (not shown in the figure) is set on the display device (e.g., at the center of the upper bezel of the monitor), and its detection range is a preset angle range in front of the display device.

[0111] In some embodiments, the size of the preset angle range is not limited, and can be, for example, 60°, 90°, 100°, 120°, 150°, or 180°. The preset angle range can be determined based on the detector's field of view parameters or the actual application scenario of the display device. For example, in a living room scenario, viewers in front of the display device are typically distributed over a wider angle range, and the preset angle range can be set to 90° or 100° to cover scenarios where multiple people are seated separately. In a bedroom or study scenario, viewers are typically concentrated in a narrower area directly in front of the display device, and the preset angle range can be set to 60° to improve detection accuracy and avoid misidentifying non-viewer objects (such as walls, furniture, etc.) as viewers. As can be seen from the above solution, by configuring the preset angle range in a scenario-specific manner, different usage environments can be flexibly adapted while ensuring the accuracy of viewer position detection, further improving the scenario adaptability and user experience of the solution.

[0112] In some embodiments, the detector can perform detection within a preset distance range. The size of the preset distance range is not limited; for example, it can be 1.5 meters, 2 meters, 2.5 meters, or 3 meters. The preset distance range can be determined based on the detector's effective detection distance or the actual distance between the display device and the audience seating area. For example, in a living room scenario, the sofa is typically 2 to 3 meters away from the television; the preset distance range could be set to 2.5 meters to cover the sofa area. For viewers farther from the display device, the preset distance range can be extended to 3 meters. If the preset distance range is too small, viewers at a greater distance cannot be detected; if the preset distance range is too large, background interference may be introduced, affecting detection accuracy. Specific values ​​can be determined according to actual product design requirements; this application embodiment does not limit this.

[0113] In addition, the preset angle range and preset distance range together define the effective detection area of ​​the detector. The processor only identifies and determines the position of the audience within the effective detection area. Objects outside the effective detection area do not participate in the determination of the audience's center position to avoid interference.

[0114] In the above embodiments, the preset angle range is divided into multiple sound-emitting zones. The number of sound-emitting zones is not limited; for example, it can be two, three, four, or more. More sound-emitting zones result in higher beam directivity adjustment accuracy, allowing for more precise adaptation to changes in audience position, but also increase system complexity (including the number of preset beam directions and processor computational load). Conversely, fewer sound-emitting zones simplify system implementation and reduce cost, but result in relatively lower adjustment accuracy. The specific number can be determined based on actual products, performance requirements, and cost budgets; this application does not limit this. For example, in a living room scenario with a three-seater sofa, the audience is widely distributed in front of the display device, so a solution with three sound-emitting zones (C2, C1, C3) can be used, corresponding to the left, center, and right positions respectively; in a single-person study scenario, the audience's position changes within a smaller range, so a solution with two sound-emitting zones (left zone and right zone) or no zone division (i.e., a single zone, with the beam direction only slightly adjusted according to the center position) can be used; in a multi-person meeting scenario, with a large number of participants and a more dispersed seating arrangement, four or more sound-emitting zones can be used to achieve more refined sound field coverage.

[0115] In some embodiments, the boundary positions between sound-emitting areas can be adjusted according to the actual application scenario. For example, when the display device is offset to one side of the living room, most viewers are located in the area slightly to the right in front of the display device. In this case, the boundary of the sound-emitting area can be shifted to the right, allowing more sound-emitting areas to cover the angle range where the viewer distribution density is high, thereby improving the beam adjustment accuracy in that area. The specific division method can be determined by the designer according to actual needs, dynamically adjusted by the processor based on historical viewer position data, or set by the user according to different usage scenarios. This application embodiment does not limit this.

[0116] In some embodiments, the sizes of the sound-emitting areas can be unequal. For example, the central area directly in front of the display device has a dense audience distribution, so a smaller angle range (i.e., a finer area division) can be set; while the areas on both sides have a sparse audience distribution, so a larger angle range can be set. Non-uniform division allows for higher adjustment precision within a limited number of sound-emitting areas. Taking a preset angle range of 90° as an example, when three sound-emitting areas are used and uniformly divided, with the center normal of the sound field area as the boundary, area C2 is -45° to -15°, area C1 is -15° to +15°, and area C3 is +15° to +45°. When non-uniform division is used, area C2 is -45° to -20°, area C1 is -20° to +20°, and area C3 is +20° to +45°, meaning the central area C1 is larger, covering a more concentrated audience area, while the areas on the left and right sides are relatively smaller.

[0117] In some embodiments, the number and division of sound-emitting regions can correspond to the number of preset beam directions. For example, when there are four preset beam directions (directions 1, 2, 3, and 4), there can be three sound-emitting regions (C2, C1, and C3), with different beam combinations covering different sound-emitting regions. In other embodiments, if there are six preset beam directions, there can be four or five sound-emitting regions to achieve more precise beam direction selection. The correspondence between each sound-emitting region and beam combination can be pre-configured and stored in a memory as needed, and the processor determines the corresponding beam combination by looking up a table based on the detected audience center position.

[0118] In some embodiments, the detector includes a camera and / or millimeter-wave radar. The camera uses image recognition technology to detect the faces or body contours of spectators in front of the display device to determine the number and location of the spectators. The millimeter-wave radar detects the distance and orientation information of spectators in front of the display device by transmitting and receiving millimeter-wave signals. The camera and millimeter-wave radar can be used individually or in combination (i.e., both cameras and millimeter-wave radar are used simultaneously) to improve the accuracy and reliability of detection. For example, visual detection can be performed using a camera in well-lit conditions, while millimeter-wave radar assists in detection in low-light conditions, achieving accurate spectator location detection.

[0119] In some embodiments, the detector may be located on the top or bottom bezel of the display device, or on the left or right bezel of the display device, with its field of view covering a preset angle range in front of the display device. The detector is communicatively connected to the processor and transmits the detected audience information (including the number of audience members, the position, angle, coordinates, etc. of each audience member) to the processor for the processor to determine the center position of the audience.

[0120] In some embodiments, the detector continuously detects the audience area at a preset frequency (e.g., 10 times per second or 30 times per second). The processor updates the determination of the sound-emitting area and the switching of the beam combination in real time based on the detector's detection results, thereby achieving real-time adaptation of the beam to the audience's position. When the detector detects that the audience's center position has switched from one sound-emitting area to another, the processor controls the speaker array to switch the corresponding beam combination. The switching process is achieved by adjusting the delay parameters and power coefficient of each speaker unit through a digital signal processor. The response speed is fast and imperceptible to the user, thereby improving the user experience.

[0121] It should be noted that, Figure 14 Taking the detection range as an area of ​​90° in front of the display device (i.e., 45° to the left and right), the detection distance is 2.5 meters (i.e., the audience can be effectively detected within this distance range), and the 90° range is divided into three sound-emitting areas, namely C2 area (left area), C1 area (central area) and C3 area (right area), as an example.

[0122] For example, Figure 15 Schematic diagram of a display device provided in an embodiment of this application Figure 9 .like Figure 15 As shown, the speaker array of the display device includes a left channel speaker array and a right channel speaker array. The left channel speaker array includes multiple full-range speakers arranged sequentially along the horizontal direction (L1, L2, L3, and L4 are shown as examples in the figure), and the right channel speaker array includes multiple full-range speakers arranged sequentially along the horizontal direction (R1, R2, R3, and R4 are shown as examples in the figure). The left and right channel speaker arrays are configured to switch between multiple preset beam directions. For example, there are four preset beam directions, denoted as direction 1, direction 2, direction 3, and direction 4, each corresponding to the orientation of the directional beams formed by the left and right channel speaker arrays after beamforming.

[0123] In some embodiments, the detector is configured to capture images or position information of the audience within a preset angle range in front of the display device, and determine the center position of the audience area based on the detection results. Specifically, when a single audience member is detected, the position of that audience member is taken as the center position of the audience area (single-person mode). For example, if an audience member is located slightly to the left in front of the display device, the processor determines that the audience member's position is the center position of the audience area and determines that the center position falls within region C2. When multiple audience members are detected, the processor takes the midpoint of the distance between two audience members at the edges as the center position of the audience area (multi-person mode). For example, if three audience members are seated separately, with the audience member on the left slightly to the left and the audience member on the right slightly to the right, the midpoint of the distance between these two audience members at the edges is taken as the center position of the audience area and determines that the center position falls within region C1 (central region).

[0124] Furthermore, based on the determination result, the processor controls the first speaker array to switch to the corresponding preset beam direction combination. In some embodiments, the correspondence between the preset beam direction combination and the sound-emitting area is shown in the following table:

[0125] Specifically, when the processor determines that the audience's center position is in region C2, it controls the first speaker array to emit sound in a combination of directions 1 and 4. Direction 1 is, for example, a beam deflected to the left, and direction 3 is, for example, a beam deflected to the right. The combination of these two directions forms a sound field distribution covering region C2. At this time, the main beam direction of the speaker array is generally deflected to the left, covering the audience position on the left, so that the audience is in the optimal listening area. Similarly, when it is determined to be region C1, it controls the combination of directions 1 and 4 to emit sound. When it is determined to be region C3, it controls the combination of directions 2 and 3 to emit sound, so that the sound field forms a wider coverage area in the central region, ensuring that all audience members can obtain a good sound field experience.

[0126] In some embodiments, the specific orientations of the preset beam directions 1, 2, 3, and 4 are as follows: direction 1 is deflected to the left by a first angle (e.g., 45°) relative to the normal of the display device, direction 2 is parallel to the normal, direction 3 is deflected to the right by a second angle (e.g., 45°) relative to the normal, and direction 4 is parallel to the normal.

[0127] In some embodiments, a detector continuously monitors the center position of the audience area and switches the corresponding preset beam direction combination based on the area the center position falls into, achieving dynamic center position adaptation. When the number or position of users changes, the detector updates the detection results in real time, and the processor switches the beam combination accordingly, ensuring that the sound field always covers the center position of the audience area. Therefore, whether watching a movie alone or in a group, and regardless of the seating arrangement, a stable wide sound field experience can be obtained, avoiding the problem of significant sound field degradation when deviating from the optimal listening area in traditional fixed center position solutions.

[0128] It should be noted that, Figure 14 , Figure 15 The solution for the display device shown can be based on Figure 5 , Figure 6 , Figure 7 , Figure 9 , Figure 10 , Figure 11 , Figure 12 Additional design on top of any of the structures, namely, adding a detector and corresponding beam combination switching control logic to the speaker array layout shown in any of the above display devices.

[0129] In one example, with Figure 8For example, the first speaker array shown includes a first speaker and a second speaker arranged sequentially in a horizontal direction, and the first speaker includes multiple full-range units. Based on this, such as... Figure 14 , Figure 15 As shown, the display device also includes a detector that detects the center position of the audience area in real time and selects the corresponding beam combination from multiple preset beam directions to emit sound based on the center position. This scheme allows the sound field coverage to change in real time with the audience's position. Simultaneously, by performing frequency-band delay control on the first speaker array according to the frequency range of the audio signal, the sound field coverage is improved, resulting in a better wide sound field experience in viewing scenarios with different numbers of people and different positions.

[0130] In yet another example, with Figure 12 For example, the beam of the first loudspeaker array is directed in a first direction that deviates from the normal by a first preset angle. Based on this, such as... Figure 14 , Figure 15 As shown, the display device also includes a detector, which detects the center position of the audience area in real time and selects the corresponding beam combination from multiple preset beam directions to emit sound based on the center position. In the above scheme, the directional bias setting of the beam can widen the coverage of the sound field. By setting the detector and real-time dynamic adaptation based on changes in the audience's position, the sound field expansion effect is not limited to a fixed position, thereby further improving the sound effect and enhancing the user experience.

[0131] In some embodiments, a display device is provided. Figure 16 Schematic diagram of a display device provided in an embodiment of this application Figure 10 .like Figure 16 As shown, the display device also includes a horn speaker, which faces outwards from the display device. In this embodiment, the processor is further configured to control the horn speaker to emit sound when the frequency of the audio signal is within a third preset frequency range.

[0132] In some embodiments, the number of horn speakers is one or more. Exemplarily, there are two horn speakers, respectively positioned on the left and right sides of the display device, radiating sound waves towards the left and right outer directions, respectively. In other embodiments, there is one horn speaker, positioned on the left or right side of the display device. In still other embodiments, there are multiple horn speakers distributed along the sides or bezels of the display device to achieve wider high-frequency sound field coverage. It should be understood that the specific number and placement of the horn speakers can be flexibly configured according to the size of the display device, product positioning, and acoustic design requirements; this application does not specifically limit this. The horn speakers' orientation towards the outer side of the display device allows high-frequency sound waves to radiate directly to the outside of the display device with a fixed directivity. This, combined with the beamforming of the speaker array, achieves a full-band sound field extension effect, while its fixed directivity ensures the stability of the high-frequency sound field.

[0133] The directivity of a loudspeaker array beam is affected by the spacing between the loudspeaker units. For example, a smaller spacing results in a higher high-frequency cutoff frequency, but with a fixed array length, a smaller spacing requires more loudspeaker units, increasing hardware costs. Similarly, the directivity of a horn loudspeaker is affected by the horn size; a larger horn size results in a lower low-frequency cutoff frequency, but larger horn sizes lead to increased costs and limited installation space. Therefore, horn loudspeakers also struggle to achieve full-range directivity control independently within a limited budget. The following discussion will combine... Figure 17 The above methods will be explained.

[0134] Figure 17 A flowchart illustrating a control method for a display device provided in an embodiment of this application. Figure 3 .like Figure 17 As shown, the processor is configured to perform the following steps: S301, acquire the audio signal to be played.

[0135] S302, when the frequency of the audio signal is within the first preset frequency range, the processor controls the left and right channel speaker arrays to form directional sound waves through beamforming, and the beam direction can be dynamically adjusted. S303, when the frequency of the audio signal is within the fifth preset frequency range, the processor does not perform beam directional control on the audio signal in this frequency band (i.e., the speaker array emits sound in the conventional way, without applying delay and power factor control).

[0136] S304, when the frequency of the audio signal is within the third preset frequency range, the processor controls the horn speaker to emit sound.

[0137] Among them, the upper limit frequency of the third preset frequency range is greater than or equal to the lower limit frequency of the first preset frequency range.

[0138] In some examples, the lower limit frequency of the first preset frequency range is less than or equal to the upper limit frequency of the third preset frequency range, and the lower limit frequency of the third preset frequency range is greater than or equal to the upper limit frequency of the first preset frequency range. For example, the first preset frequency range is, for instance, 170Hz to 680Hz. The fifth preset frequency range is, for example, 680Hz to 1.5kHz, where the directionality is achieved by the combined directivity of the lower frequency band (170Hz-680Hz) and the higher frequency band (above 1.5kHz), creating a psychoacoustic sound field broadening effect without the need for additional beamforming control, thus reducing system complexity. The third preset frequency range is, for example, above 1.5kHz, with the horn speaker oriented outwards towards the display device (e.g., towards the left and right sides of the television) to radiate high-frequency sound waves with a fixed directionality.

[0139] In this solution, the first, second, and third preset frequency ranges are sequentially connected on the frequency axis, collectively covering the complete sound field control frequency band from low to high frequencies. Full-band sound field control is achieved by combining array beamforming with the fixed directivity of horn speakers. Specifically, in the low-to-mid frequency range (first preset frequency range), array beamforming provides dynamically adjustable directivity to enhance the sense of atmosphere; in the mid-frequency transition range (third preset frequency range), no directivity control is applied, utilizing psychoacoustic effects for a natural transition; and in the high-frequency range (third preset frequency range), horn speakers provide fixed directivity amplification to expand the sound field width. This solution achieves continuous sound field expansion from low to high frequencies with low system complexity without significantly increasing the number of speaker units or horn size, overcoming the technical limitations of high-frequency directivity in array speakers and low-frequency directivity in horn speakers, thereby reducing costs while improving sound quality and user experience. It should be noted that... Figure 16 The horn loudspeaker scheme shown can be based on Figure 5 , Figure 6 , Figure 7 , Figure 9 , Figure 10 , Figure 11 or Figure 14 , Figure 15 Additional design on top of any of the structures. For example, with... Figure 16 based on Figure 8 Taking the structure as an example, the display device includes a first speaker array, which includes a first speaker and a second speaker. The first speaker includes multiple full-range units. Based on this, a horn speaker is set on the display device, with the horn speaker positioned to the outside of the display device (…). Figure 16(Taking two horn loudspeakers as an example). Through the above scheme, the mid-low frequency band is provided with dynamically adjustable directivity by array beamforming, while the high frequency band is provided with fixed directivity by horn loudspeakers. The first loudspeaker array compensates for the insufficient low-frequency directivity of the horn loudspeakers, and the horn loudspeakers compensate for the limited high-frequency directivity of the array loudspeakers. Thus, a continuous sound field extension effect from low to high frequencies is achieved with low system complexity. At the same time, the mid-frequency transition band is left uncontrolled to reduce the complexity of the scheme, achieving a good balance between cost and performance.

[0140] In yet another example, Figure 12 As shown, the beam of the first loudspeaker array is pointed in a first direction that deviates from the normal by a first preset angle. Based on this, as... Figure 16 As shown, a horn speaker is installed on the display device, and the horn speaker points outward from the display device. This scheme demonstrates that array beam deflection provides a wide sound field foundation in the mid-to-low frequency range, while the horn speaker compensates for the limited high-frequency directivity in the array deflection scheme. Thus, a continuous sound field extension effect from low to high frequencies is achieved with lower system complexity, while the unused mid-frequency transition section is left uncontrolled for directivity, reducing the complexity of the scheme.

[0141] In yet another example, Figure 14 As shown, a detector is installed on the display device. Based on this, as... Figure 16 As shown, a horn speaker is installed on the display device, facing outwards from the display. This scheme demonstrates that the display device uses a detector to dynamically adapt the beam directionality to changes in the viewer's position. Building upon this, the horn speaker further ensures a wide high-frequency sound field, thus achieving a stable sound field expansion effect and further enhancing the user's immersive listening experience.

[0142] In some embodiments, a display device is provided. Figure 18 Schematic diagram of a display device provided in an embodiment of this application Figure 10 1. For example Figure 18 As shown, the spacing between adjacent speakers in the first speaker array is not equal along the horizontal direction, and satisfies d1<d2<…<dL-1, where d1 is the spacing between adjacent speakers on the side closer to the edge of the display device, and dL-1 is the spacing between adjacent speakers on the side farther from the edge of the display device.

[0143] The inventors discovered that the directivity of the first speaker array beam is affected by the spacing between the units. The smaller the spacing, the higher the upper limit of the effective frequency of beamforming. However, if the entire array uses a small spacing, the number of units needs to be increased, which increases the cost and the number of power amplifier channels. Based on this, in some embodiments, the spacing between adjacent speakers is not uniformly distributed, but gradually increases from the edge of the display device towards the center (i.e., the spacing is small on the edge side and large on the center side), thereby saving costs while improving sound effects and enhancing the user experience.

[0144] In some embodiments, the speakers are arranged in a non-equidistant manner along the horizontal direction, including but not limited to any of the following: The speaker spacing can increase in a geometric progression (exponential arrangement), an arithmetic progression (linear gradient), or a predetermined spacing along the horizontal direction. These arrangements satisfy the trend of gradually increasing spacing from the edge to the center, with D1 being the minimum and DL-1 the maximum. For example, taking a speaker array length DL of 1m as an example, d1 can be 100mm and d2 can be 140mm. A full array operating mode is used when the audio signal frequency is below 500Hz, and a small-pitch subarray consisting of L1, L2, and L3 is used when the audio signal frequency is above 500Hz. The effective speaker spacing of the small-pitch subarray is 120mm, so its Fmax = c / 2 * 0.12 = 1416Hz. In this operating mode, the effective high-frequency cutoff frequency of the array speakers can be effectively improved.

[0145] Next, combined Figure 19 The control method for this display is explained. Figure 19 A flowchart illustrating a control method for a display device provided in an embodiment of this application. Figure 4 .like Figure 19 As shown, the processor is configured to perform the following steps: S401, the processor acquires the audio signal to be played.

[0146] S402, determine the fourth preset frequency range in which the frequency of the audio signal is located.

[0147] S403, Based on the preset correspondence between preset frequency range and virtual subarray, determine at least one virtual subarray corresponding to the fourth preset frequency range.

[0148] S404 controls at least one virtual subarray to emit sound.

[0149] Each virtual subarray comprises at least two adjacent speakers. Specifically, in the high-frequency range (e.g., the fourth preset frequency range is >2.43kHz), the processor constructs virtual subarrays with at least two adjacent speakers and synthesizes beams from multiple virtual subarrays. By virtualizing multiple adjacent physical speakers into a single subarray, the effective spacing and acoustic center position of the array are effectively altered, thereby expanding the effective preset frequency range of high-frequency beamforming without adding additional hardware units.

[0150] In some embodiments, taking L=5 as an example (i.e., the subarray includes 5 speakers from L1 to L5), the correspondence between the preset frequency range and the virtual subarray is as follows: When the frequency range is greater than 1.42kHz, the corresponding virtual subarray includes a first virtual subarray A composed of L1 and L2, and a second virtual subarray B composed of L1, L2 and L3. At this time, the acoustic center distance between virtual subarray A and virtual subarray B is D (for example, D=70mm). The beams of the two virtual subarrays interfere and combine in space, and the upper limit frequency of its equivalent beamforming is Fmax = c / (2D) = 340 / (2×0.07) ≈ 2.43kHz.

[0151] When the frequency range is greater than 2.43kHz, the corresponding virtual subarray includes a first virtual subarray A composed of L2 and L3, and a second virtual subarray B composed of L1 and L3. At this time, the acoustic center distance D1 (D1=50mm) between the two virtual subarrays A and B interferes and synthesizes the beams in space. The upper limit frequency of its equivalent beamforming is Fmax = c / (2D) = 340 / (2×0.05) ≈ 3.4kHz.

[0152] In some embodiments, the upper limit frequency of the fourth preset frequency range is greater than or equal to the lower limit frequency of the aforementioned second preset frequency range. When the fourth preset frequency range is a high-frequency band (e.g., greater than 1.42kHz), the processor activates the virtual subarray mode and controls the high-frequency beam directivity through the interferometric synthesis of the virtual subarray.

[0153] By employing the above method, since the center spacing D of the virtual subarray can be greater than the physical unit spacing, the gradual spacing arrangement of the speakers and the cross-shaped virtual subarrays can be combined, and the combination of the virtual subarrays can be appropriately designed to optimize the directivity of the high-frequency beam. This avoids the problems of increased unit quantity and cost caused by small physical spacing, thereby improving sound effects while ensuring cost, and thus enhancing the user experience.

[0154] It should be noted that, Figure 18 The gradient spacing and virtual subarray scheme shown can be based on Figure 5 , Figure 6 , Figure 7 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 14 , Figure 15 , Figure 16 Additional design on top of any of the structures.

[0155] For example, with Figure 6 For example, the left channel speaker array and the right channel speaker array each include multiple full-range speakers arranged sequentially along the horizontal direction. Based on this, such as... Figure 18 As shown, the spacing between the full-range speakers is set to be non-equidistant from the edge of the display device towards the center (D1 < D2 < ... < DL-1). When the frequency of the audio signal is within a fourth preset frequency range, the processor uses at least two adjacent full-range speakers to form a virtual subarray, and synthesizes a beam using multiple virtual subarrays. For example, using... Figure 18 based on Figure 6 Taking the structure as an example, the left channel speaker array includes five full-range speakers L1 to L5. The spacing between adjacent full-range speakers, from the L1 side (edge ​​side) to the L5 side (center side), is D1=50mm, D2=55mm, D3=60mm, and D4=65mm respectively, satisfying D1<D2<D3<D4. When playing an audio signal and the frequency is within the fourth preset frequency range, the processor constructs a first virtual subarray A from L1 and L2, and a second virtual subarray B from L1, L2, and L3. The acoustic center of virtual subarray A is located between L1 and L2, and the acoustic center of virtual subarray B is located at the weighted center of L1, L2, and L3, with a center distance of approximately 70mm. The equivalent upper limit frequency of the synthesized beam from the two virtual subarrays is Fmax = 340 / (2×0.07) ≈ 2.43kHz. In this way, the preset frequency range of high-frequency beamforming is effectively extended without adding additional hardware units.

[0156] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0157] It should be noted that the information interaction and execution process between the above-mentioned devices / units are based on the same concept as the method embodiments of this application. For details on their specific functions and technical effects, please refer to the method embodiments section, and they will not be repeated here.

[0158] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0159] This application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps described in the various method embodiments above.

[0160] This application provides a computer program product that, when run on a mobile terminal, enables the mobile terminal to implement the steps described in the above-described method embodiments.

[0161] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of this application can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. A computer-readable medium can include at least: any entity or device capable of carrying computer program code to a photographic device / electronic device, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium. Examples include USB flash drives, portable hard drives, magnetic disks, or optical disks. In some jurisdictions, according to legislation and patent practice, a computer-readable medium cannot be an electrical carrier signal or a telecommunication signal.

[0162] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0163] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0164] In the embodiments provided in this application, it should be understood that the disclosed apparatus / network devices and methods can be implemented in other ways. For example, the apparatus / network device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0165] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0166] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A display device, characterized in that, include: monitor; A first loudspeaker array, comprising a first loudspeaker and a second loudspeaker, wherein the first loudspeaker includes multiple full-range units; And a processor, which is communicatively connected to the first speaker array and configured to acquire the audio signal to be played; When the frequency of the audio signal is within a first preset frequency range, a drive signal is output to the first speaker and the second speaker to make the first speaker and the second speaker produce sound, and the delay of multiple full-range units in the first speaker is the same; In addition, when the frequency of the audio signal is within a second preset frequency range, independent drive signals are output to the multiple full-range units of the first speaker to make the first speaker produce sound, and the delays of the multiple full-range units in the first speaker are different.

2. The display device according to claim 1, characterized in that, The first speaker is a speaker in the first speaker array that is located near the edge of the display device.

3. The display device according to claim 1, characterized in that, Each full-range unit in the first loudspeaker is controlled by a different power amplifier unit; each full-range unit in the same second loudspeaker is controlled by a single power amplifier unit.

4. The display device according to claim 1, characterized in that, The first loudspeaker includes two, three, or four full-range units; the second loudspeaker includes one, two, three, or four full-range units.

5. The display device according to claim 1, characterized in that, The audio signal is a surround sound audio signal.

6. The display device according to claim 1, characterized in that, The beam of the first speaker array points in a first direction, which is directed toward the outside of the display device and forms an angle with the normal direction of the display device of a first preset angle, which is greater than 0 degrees and less than 90 degrees.

7. The display device according to any one of claims 1-6, characterized in that, Also includes: The detector is configured to detect an audience area within a preset angle range in front of the display device, the preset angle range being divided into at least two sound-emitting areas; The processor is further configured to: Based on the detection results of the detector, the center position of the audience area is determined; The sound-emitting area at the center position is determined as the target sound-emitting area, and the target beam combination corresponding to the target sound-emitting area is determined from multiple beam directions corresponding to the first speaker array, so as to control the speakers in the first speaker array to emit sound based on the target beam combination.

8. The display device according to any one of claims 1-6, characterized in that, Also includes: A horn speaker, wherein the horn speaker is positioned facing outwards from the display device; The processor is further configured to control the horn speaker to emit sound when the frequency of the audio signal is within a third preset frequency range.

9. The display device according to any one of claims 1-6, characterized in that, In the first speaker array, the spacing between adjacent speakers is not equidistant along the horizontal direction of the display device, and satisfies d1 < d2 < ... < dL-1, where d1 is the spacing between two adjacent speakers on the side closer to the edge of the display device, and dL-1 is the spacing between two adjacent speakers on the side farther from the edge of the display device. The processor is further configured to: Determine the fourth preset frequency range in which the frequency of the audio signal falls; Based on the preset correspondence between frequency ranges and virtual sub-arrays, at least one virtual sub-array corresponding to the fourth preset frequency range is determined from the first speaker array; Control the at least one virtual subarray to emit sound; Each of the at least one virtual subarray includes at least two adjacent speakers.

10. A control method for a display device, characterized in that, The display device includes: a display; a first speaker array, the first speaker array including a first speaker and a second speaker, the first speaker comprising a plurality of full-range units; and a processor, the processor being communicatively connected to the first speaker array. The method includes: Obtain the audio signal to be played; When the frequency of the audio signal is within a first preset frequency range, a drive signal is output to the first speaker and the second speaker to make the first speaker and the second speaker produce sound, and the delay of multiple full-range units in the first speaker is the same; When the frequency of the audio signal is within a second preset frequency range, independent drive signals are output to the multiple full-range units of the first speaker to make the first speaker produce sound, and the delays of the multiple full-range units in the first speaker are different.

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