LED lamp set template and acousto-optic display device

Abstract

This invention discloses an LED lamp assembly template and an audio-visual display device, relating to the field of LED display and audio-visual linkage control technology. The invention includes a substrate, an LED bead array disposed on the front side of the substrate, and a drive control unit. The invention adopts a standardized and modular LED lamp assembly template design. Through interlocking splicing components on the sides, it achieves rapid physical splicing of multiple templates. Combined with an asymmetrical foolproof structure and elastic self-locking buckles, it effectively avoids incorrect installation and ensures the stability of the splicing structure. Damaged individual templates can be disassembled and replaced individually without disassembling the entire screen, significantly reducing maintenance costs and difficulty. During splicing, power and control signals are cascaded through conductive contacts within the connectors, eliminating the need for additional wiring and greatly improving installation efficiency. The standardized templates are universally reusable, eliminating the need for separate molds for different scenarios, reducing R&D and manufacturing costs, and enabling large-scale mass production and rapid deployment.

Description

Technical Field

[0001] This invention belongs to the field of LED display and sound and light linkage control technology, and in particular relates to an LED lamp assembly template and a sound and light display device. Background Technology

[0002] Currently, LED sound and light display devices have been widely used in various scenarios such as stage performances, advertising media, landscape lighting, and immersive space experiences. With the development of the industry, the market has put forward higher requirements for the installation efficiency, synchronization effect, ease of maintenance, and service life of the devices.

[0003] Existing LED sound and light display devices suffer from the following significant technical defects:

[0004] First, most LED light sets adopt an integrated screen design. When a single LED or a part of the circuit is damaged, the entire screen needs to be disassembled and repaired, resulting in high maintenance costs and low efficiency. A few splicing light sets can only achieve simple physical splicing. The splicing structure is complex and there is no foolproof design. On-site installation is prone to incorrect or reverse connection. In addition, it can only achieve power transmission and cannot achieve synchronous cascading of control signals. When splicing multiple screens, it is very easy to have problems such as screen asynchrony and color deviation.

[0005] Secondly, the sound and light synchronization control is achieved by external independent controllers. The lighting drive unit and the audio control unit are set up separately, resulting in complex on-site wiring, long signal transmission links, and sound and light synchronization delays generally exceeding 100ms. This makes it impossible to achieve millisecond-level precise synchronization, which seriously affects the immersiveness and consistency of the sound and light display and cannot meet the needs of high-precision performance and immersive experience scenarios.

[0006] Third, the heat dissipation structure of existing LED lamp groups is a separate design from the lamp board, resulting in a long heat dissipation path, low heat dissipation efficiency, excessively high temperature of LED lamp beads when working under high load for a long time, severe light decay, significantly shortened lifespan, and inability to adapt to commercial scenarios with long-term continuous operation.

[0007] Fourth, the standardization is extremely low. Display devices of different sizes and for different scenarios require separate mold design, which cannot be universally reused. The research and development and manufacturing costs are high, and it is impossible to achieve mass production and rapid deployment.

[0008] To address these issues, we provide an LED light assembly template and an audio-visual display device. Summary of the Invention

[0009] The purpose of this invention is to provide an LED light assembly template and an audio-visual display device. By cooperating with the LED light assembly template, the main control unit, the audio output unit, and the power supply unit, the problem of the inconvenience of using existing light assembly templates and audio-visual display devices is solved.

[0010] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution.

[0011] This invention relates to an LED lamp assembly template, comprising a substrate, an LED bead array disposed on the front side of the substrate, and a drive control unit. At least two opposite sides of the substrate are provided with interlocking splicing and locking components. Each splicing and locking component includes a male connector on a first side and a female connector on a second side. The male and female connectors can be plugged into and locked with the female and male connectors of adjacent LED lamp assembly templates of the same specification. The drive control unit is integrated on the back side of the substrate and includes an LED bead driving module, an audio-visual synchronization interface module, and a cascaded communication module. The audio-visual synchronization interface module is electrically connected to the cascaded communication module. Both the male and female connectors have conductive contacts electrically connected to the cascaded communication module and power supply lines. When adjacent LED lamp assembly templates are spliced, the corresponding conductive contacts are connected to achieve cascaded transmission of power and control signals. The back side of the substrate also has an integrated heat dissipation component, which is thermally connected to the pads of the LED bead array.

[0012] An audio-visual display device includes at least one LED lamp group template as described in claim 1, and further includes a main control unit, an audio output unit, and a power supply unit. The main control unit is electrically connected to the power supply unit, the audio output unit, and the audio-visual synchronization interface module of the LED lamp group template. The main control unit has a built-in audio-visual synchronization algorithm module, which can generate corresponding LED lamp bead array drive control signals according to the frequency, amplitude, and beat characteristics of the audio signal to achieve real-time synchronization between audio output and light display. The power supply unit supplies power to all LED lamp group templates through cascaded conductive contacts.

[0013] The present invention is further configured such that the insertion end of the male connector has an asymmetrical structure, and the insertion groove of the female connector is a foolproof structure adapted to the asymmetrical structure, which can be locked only when the insertion direction is matched.

[0014] The present invention is further configured such that the integrated heat dissipation component is an aluminum alloy heat dissipation fin, and the aluminum alloy heat dissipation fin is integrally pressed with the substrate by thermally conductive solder, forming a direct heat dissipation path with each pad of the LED lamp bead array.

[0015] The present invention is further configured such that the cascaded communication module includes a wired communication unit and a wireless communication unit, the wired communication unit is electrically connected to a conductive contact, and the wireless communication unit is a Bluetooth, WiFi, and 5G communication module, which can realize multi-template wireless cascaded signal transmission.

[0016] The present invention is further configured such that the drive control unit also integrates a temperature detection module and an overheat protection module, the temperature detection module being thermally connected to the LED bead array, and the overheat protection module being able to cut off the drive power supply when the bead temperature exceeds a threshold.

[0017] The present invention is further configured such that the audio-visual synchronization algorithm module includes an audio preprocessing unit, a feature extraction unit, a light mapping unit, and a signal output unit connected in sequence.

[0018] The audio preprocessing unit is used to filter and reduce noise in the audio signal. The feature extraction unit is used to extract the frequency, amplitude, beat, and rhythm features of the audio. The light mapping unit is used to generate the RGB values, brightness values, and refresh rate parameters of the LED beads based on the extracted feature mapping. The signal output unit is used to transmit the drive control signal to the cascaded LED light group template in real time.

[0019] The present invention is further configured such that the audio output unit is configured in a one-to-one correspondence with the LED light group template, the audio output unit is integrated on the substrate of the corresponding LED light group template, and is electrically connected to the audio-visual synchronization interface module.

[0020] The present invention is further configured such that the male connector has an elastic self-locking buckle at the insertion end, and the inner wall of the female connector has a limiting groove adapted to the elastic self-locking buckle. After the insertion and locking are completed, the elastic self-locking buckle is locked into the limiting groove to achieve axial anti-disengagement self-locking, and the locking state is released only by pressing the elastic self-locking buckle.

[0021] The present invention is further configured such that the main control unit also has a built-in splicing calibration module, which can automatically identify the number, physical arrangement position and inherent equipment parameters of LED light group templates in the cascaded link, and automatically complete the brightness consistency calibration, color gamut calibration and synchronization clock calibration between multiple templates.

[0022] The present invention has the following beneficial effects.

[0023] 1. This invention adopts a standardized and modular LED light group template design. Through the interlocking splicing components on the sides, it can realize the rapid physical splicing of multiple templates. With the asymmetrical foolproof structure and elastic self-locking buckle, it can effectively avoid incorrect installation and ensure the stability of the splicing structure. When a single template is damaged, it can be disassembled and replaced individually without disassembling the entire screen, which greatly reduces maintenance costs and difficulty. During splicing, the conductive contacts in the connector realize the cascaded transmission of power and control signals, eliminating the need for additional wiring and greatly improving installation efficiency. The standardized template can be universally reused, eliminating the need for separate molds for different scenarios, reducing R&D and manufacturing costs, and enabling large-scale mass production and rapid deployment.

[0024] 2. This invention integrates a drive control unit with a main control unit containing a built-in audio-visual synchronization algorithm module, integrating light driving, audio-visual synchronization interface, and cascaded communication on the back of the template substrate. This significantly shortens the signal transmission link. The audio-visual synchronization algorithm can extract audio features in real time and map them to generate light driving signals, achieving millisecond-level precise synchronization between audio and light. This solves the problems of high audio-visual delay and poor synchronization effect in traditional devices. At the same time, it adopts an integrated heat dissipation component, forming a direct heat dissipation path with the LED chip pads, which greatly improves heat dissipation efficiency, effectively reduces the operating temperature of the LED chips, reduces light decay, and extends the service life of the device. Combined with an overheat protection module, it further improves the stability and safety of the device during long-term continuous operation. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0026] Figure 1 This is a perspective view of an LED light assembly template and an audio-visual display device.

[0027] Figure 2 This is a rear view schematic diagram of a substrate in an LED lamp assembly template and an audio-visual display device.

[0028] Figure 3 This is a three-dimensional schematic diagram of a male connector in an LED light assembly template and an audio-visual display device.

[0029] Figure 4 This is a cross-sectional schematic diagram of a female connector in an LED light assembly template and an audio-visual display device.

[0030] Figure 5 This is a schematic diagram of the main control unit system in an LED light group template and an audio-visual display device.

[0031] Figure 6 This is a schematic diagram of the cascaded communication module system in an LED light group template and sound and light display device.

[0032] Figure 7 This is a schematic diagram of the sound and light synchronization algorithm module system in an LED lamp group template and sound and light display device.

[0033] In the attached diagram: 1. Substrate; 2. LED bead array; 3. Drive control unit; 31. LED bead drive module; 32. Audio-visual synchronization interface module; 33. Cascaded communication module; 34. Temperature detection module; 35. Overheat protection module; 4. Splicing and locking assembly; 41. Male connector; 42. Female connector; 43. Elastic self-locking buckle; 44. Limiting slot; 5. Integrated heat dissipation assembly; 51. Aluminum alloy heat dissipation fins; 6. Main control unit; 7. Audio output unit; 8. Power supply unit. Detailed Implementation

[0034] The technical solutions of the present invention will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown; an LED lamp assembly template includes: a substrate 1, an LED lamp bead array 2 disposed on the front side of the substrate 1, and a drive control unit 3; at least two opposite sides of the substrate 1 are provided with interlocking splicing and locking components 4, the splicing and locking components 4 including a male connector 41 disposed on the first side and a female connector 42 disposed on the second side, the male connector 41 and the female connector 42 can be plugged and locked with the female connector 42 and the male connector 41 of an adjacent LED lamp assembly template of the same specification; the drive control unit 3 is integrated on the back side of the substrate 1, driving... The control unit 3 includes an LED bead driving module 31, an audio-visual synchronization interface module 32, and a cascaded communication module 33. The audio-visual synchronization interface module 32 is electrically connected to the cascaded communication module 33. Both the male connector 41 and the female connector 42 are provided with conductive contacts that are electrically connected to the cascaded communication module 33 and the power supply line. When adjacent LED lamp group templates are spliced, the corresponding conductive contacts are connected to realize the cascaded transmission of power and control signals. The back of the substrate 1 is also provided with an integrated heat dissipation component 5, which is thermally connected to the pads of the LED bead array 2.

[0036] Specifically, in implementation, substrate 1 is a standardized rigid circuit board, providing a mounting carrier for the LED lamp array 2 and the drive control unit 3; the LED lamp array 2 uses surface-mount RGB lamps arranged in a matrix and soldered to the front of substrate 1 to realize image display and lighting effect output; the splicing and locking assembly 4 realizes the rapid physical splicing of multiple templates of the same specification, and the interoperability design of male connector 41 and female connector 42 ensures the convenience of splicing and structural stability; the drive control unit 3 is integrated on the back of substrate 1, which greatly shortens the signal transmission link and the lamp drive module. 31 is used to directly drive the individual LED beads of the LED bead array 2. The sound and light synchronization interface module 32 is used to receive the sound and light synchronization control signal. The cascaded communication module 33 is used to realize the cascaded transmission of control signals between multiple modules. The conductive contacts in the male connector 41 and the female connector 42 realize the synchronous conduction of power and control signals at the same time as the physical splicing is completed, without the need for additional wiring, which greatly improves the installation efficiency. The integrated heat dissipation component 5 is directly connected to the pads of the LED bead array 2 for thermal conduction, which shortens the heat dissipation path, improves the heat dissipation efficiency, and ensures the long-term stable operation of the LED beads.

[0037] Another implementation method:

[0038] like Figure 3 , Figure 4 As shown; in practice, the insertion end of the male connector 41 has an asymmetrical structure, and the insertion groove of the female connector 42 has a foolproof structure adapted to the asymmetrical structure, which can be locked only when the insertion direction is matched; the insertion end of the male connector 41 is provided with an elastic self-locking buckle 43, and the inner wall of the insertion groove of the female connector 42 is provided with a limiting groove 44 adapted to the elastic self-locking buckle 43. After the insertion is locked, the elastic self-locking buckle 43 is inserted into the limiting groove 44 to achieve axial anti-disengagement self-locking, and the locking state is released only by pressing the elastic self-locking buckle 43.

[0039] Specifically, the asymmetrical anti-misconnection structure can avoid reverse connection and incorrect connection problems during on-site installation, greatly reducing the installation error rate; the cooperation between the elastic self-locking buckle 43 and the limiting slot 44 realizes axial anti-detachment after splicing, ensuring the stability of the physical splicing structure. At the same time, it can be quickly unlocked by simply pressing the buckle, which is convenient for disassembling and maintaining a single template without disassembling the entire screen, greatly reducing maintenance costs and difficulties.

[0040] Another implementation method:

[0041] like Figure 2 As shown; in practice, the integrated heat dissipation component 5 is an aluminum alloy heat dissipation fin 51. The aluminum alloy heat dissipation fin 51 is integrally pressed with the substrate 1 by thermally conductive solder, forming a direct heat dissipation path with each pad of the LED lamp bead array 2.

[0042] Specifically, the aluminum alloy heat sink 51 has excellent thermal conductivity and structural strength. By integrally pressing the thermally conductive solder with the substrate 1, the contact thermal resistance of the heat dissipation interface is eliminated, and a direct heat dissipation path is formed with each lamp bead pad. Heat can be directly conducted from the pad to the heat sink fin and dissipated quickly, which greatly shortens the heat dissipation path, improves heat dissipation efficiency, effectively reduces the operating temperature of the lamp bead, reduces light decay, extends the service life of the device, and is suitable for commercial scenarios with long-term continuous operation.

[0043] Another implementation method:

[0044] like Figure 6 As shown; in implementation, the cascaded communication module 33 includes a wired communication unit and a wireless communication unit. The wired communication unit is electrically connected to the conductive contacts, and the wireless communication unit is a Bluetooth, WiFi, and G communication module, which can realize multi-template wireless cascaded signal transmission.

[0045] Specifically, the wired communication unit achieves wired cascading of signals through the interconnected conductive contacts, resulting in stable transmission and low latency, making it suitable for conventional splicing display scenarios. The wireless communication unit enables wireless cascading signal transmission for multiple templates, adapting to special installation scenarios with irregular layouts or where wired cascading is not possible, significantly expanding the applicable scenarios of the device and improving deployment flexibility.

[0046] Another implementation method:

[0047] like Figure 2 As shown; in practice, the drive control unit 3 also integrates a temperature detection module 34 and an overheat protection module 35. The temperature detection module 34 is thermally connected to the LED lamp bead array 2, and the overheat protection module 35 can cut off the drive power supply when the lamp bead temperature exceeds the threshold.

[0048] Specifically, the temperature detection module 34 collects the operating temperature of the LED bead array 2 in real time and transmits the temperature signal to the overheat protection module 35. When the operating temperature of the bead exceeds the preset safety threshold, the overheat protection module 35 can immediately cut off the driving power of the corresponding bead to prevent the bead from being damaged due to high temperature. At the same time, it can send an overheat alarm signal to the host computer, which improves the safety and reliability of the device operation and further extends the service life of the device.

[0049] Another implementation method:

[0050] like Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown; an audio-visual display device includes at least one of the aforementioned LED light group templates, and also includes a main control unit 6, an audio output unit 7, and a power supply unit 8; the main control unit 6 is electrically connected to the power supply unit 8, the audio output unit 7, and the audio-visual synchronization interface module 32 of the LED light group templates respectively; the main control unit 6 has a built-in audio-visual synchronization algorithm module, which can generate corresponding LED light bead array 2 driving control signals according to the frequency, amplitude, and beat characteristics of the audio signal, so as to realize real-time synchronization between audio output and light display; the power supply unit 8 supplies power to all LED light group templates through cascaded conductive contacts.

[0051] Specifically, during implementation, the main control unit 6 serves as the control core of the device, the power supply unit 8 provides a stable power supply for the entire device, and the audio output unit 7 is used for audio signal playback output. The sound and light synchronization algorithm module can process the input audio signal in real time, extract audio features, and map them to generate corresponding light drive control signals. Through the sound and light synchronization interface module 32 and the cascaded communication module 33, the control signals are transmitted in real time to each cascaded LED light group template, achieving millisecond-level precise synchronization between audio output and light display, greatly improving the immersiveness and consistency of sound and light display, and adapting to high-end scenarios such as high-precision performances and immersive experiences. The power supply unit 8 achieves unified power supply for all cascaded templates through the spliced ​​conductive contacts, eliminating the need to lay power lines separately for each template, greatly simplifying on-site wiring and improving installation efficiency.

[0052] Another implementation method:

[0053] like Figure 7 As shown; in implementation, the audio-visual synchronization algorithm module includes an audio preprocessing unit, a feature extraction unit, a light mapping unit, and a signal output unit connected in sequence; the audio preprocessing unit is used to filter and reduce noise in the audio signal, the feature extraction unit is used to extract the frequency, amplitude, beat, and rhythm features of the audio, the light mapping unit is used to generate the RGB values, brightness values, and refresh frequency parameters of the LED beads based on the extracted feature mapping, and the signal output unit is used to transmit the drive control signal to the cascaded LED light group template in real time.

[0054] Specifically, the audio preprocessing unit filters and reduces noise in the original audio signal to remove interference signals and ensure the accuracy of audio feature extraction; the feature extraction unit analyzes the processed audio signal in real time to accurately extract core audio features such as frequency, amplitude, beat, and rhythm points; the light mapping unit converts the audio features into driving parameters such as RGB values, brightness, and refresh rate of LED beads in real time according to preset mapping rules; and the signal output unit transmits the generated driving control signal to all cascaded LED light group templates with low latency, achieving precise synchronization between light effects and audio. The synchronization delay can be controlled within 20ms, which is far better than the delay of more than 100ms in the existing technology, greatly improving the sound and light synchronization effect.

[0055] Another implementation method:

[0056] like Figure 2 As shown; in practice, the audio output unit 7 is set up one-to-one with the LED light group template. The audio output unit 7 is integrated on the substrate 1 of the corresponding LED light group template and is electrically connected to the sound and light synchronization interface module 32.

[0057] Specifically, the audio output unit 7 is integrated with the LED light module in a one-to-one correspondence, realizing a modular design that integrates sound and light. Each module can independently realize light display and audio output. The number of modules can be flexibly increased or decreased according to the needs of the scene. There is no need to lay out additional audio lines, which further simplifies the on-site installation process. At the same time, it can realize distributed audio output, improving the uniformity and immersion of the sound field.

[0058] Another implementation method:

[0059] like Figure 5 As shown; during implementation, the main control unit 6 also has a built-in splicing calibration module. The splicing calibration module can automatically identify the number of LED light group templates, physical arrangement positions and inherent equipment parameters in the cascaded link, and automatically complete the brightness consistency calibration, color gamut calibration and synchronization clock calibration between multiple templates.

[0060] Specifically, the splicing calibration module can automatically identify and calibrate cascaded templates after the device is powered on, eliminating the need for manual debugging of each module and significantly reducing the workload and technical threshold of on-site debugging. Through brightness consistency calibration and color gamut calibration, it can ensure that the display effect of all splicing templates is uniform and consistent, avoiding problems such as color difference and uneven brightness. Through synchronous clock calibration, it can ensure that the light refresh and audio output of all cascaded templates are completely synchronized, avoiding problems such as screen tearing and desynchronization, further improving the display effect and sound and light synchronization performance.

Claims

1. An LED lamp assembly template, comprising a substrate (1), an LED lamp bead array (2) disposed on the front side of the substrate (1), and a drive control unit (3), characterized in that: The substrate (1) has at least two opposite sides provided with interlocking splicing and locking components (4). The splicing and locking components (4) include a male connector (41) on the first side and a female connector (42) on the second side. The male connector (41) and the female connector (42) can be plugged and locked with the female connector (42) and the male connector (41) of the adjacent LED lamp group template of the same specification. The drive control unit (3) is integrated on the back of the substrate (1). The drive control unit (3) includes a lamp bead drive module (31), an acoustic-optical synchronization interface module (32), and a cascaded communication module (33). The acoustic-optical synchronization interface module (32) and the cascaded communication module (33) are electrically connected. Both the male connector (41) and the female connector (42) are provided with conductive contacts that are electrically connected to the cascaded communication module (33) and the power supply line. When adjacent LED light group templates are spliced, the corresponding conductive contacts are connected to realize the cascaded transmission of power and control signals. The back of the substrate (1) is also provided with an integrated heat dissipation component (5), which is thermally connected to the pads of the LED lamp bead array (2).

2. The LED light assembly template according to claim 1, characterized in that: The male connector (41) has an asymmetrical structure at the insertion end, and the female connector (42) has a foolproof groove adapted to the asymmetrical structure, which can be locked only when the insertion direction is matched.

3. The LED light assembly template according to claim 1, characterized in that: The integrated heat dissipation component (5) is an aluminum alloy heat dissipation fin (51). The aluminum alloy heat dissipation fin (51) is integrated with the substrate (1) by thermally conductive solder and forms a direct heat dissipation path with each pad of the LED lamp bead array (2).

4. The LED light assembly template according to claim 1, characterized in that: The cascaded communication module (33) includes a wired communication unit and a wireless communication unit. The wired communication unit is electrically connected to a conductive contact. The wireless communication unit is a Bluetooth, WiFi, and 5G communication module, which can realize multi-template wireless cascaded signal transmission.

5. The LED light assembly template according to claim 1, characterized in that: The drive control unit (3) also integrates a temperature detection module (34) and an overheat protection module (35). The temperature detection module (34) is thermally connected to the LED bead array (2), and the overheat protection module (35) can cut off the drive power supply when the bead temperature exceeds the threshold.

6. The LED light assembly template according to claim 2, characterized in that: The male connector (41) has an elastic self-locking buckle (43) at the insertion end, and the female connector (42) has a limiting groove (44) on the inner wall of the insertion groove that is adapted to the elastic self-locking buckle (43). After the insertion is locked, the elastic self-locking buckle (43) is inserted into the limiting groove (44) to achieve axial anti-disengagement self-locking. The locking state can be released by pressing the elastic self-locking buckle (43).

7. An audio-visual display device, characterized in that, The device includes at least one LED light assembly template as described in claim 1, and also includes a main control unit (6), an audio output unit (7), and a power supply unit (8). The main control unit (6) is electrically connected to the power supply unit (8), the audio output unit (7), and the sound and light synchronization interface module (32) of the LED lamp group template. The main control unit (6) has a built-in sound and light synchronization algorithm module. The sound and light synchronization algorithm module can generate corresponding LED lamp array (2) drive control signals according to the frequency, amplitude, and beat characteristics of the audio signal to realize real-time synchronization between audio output and light display. The power supply unit (8) supplies power to all LED light modules through cascaded conductive contacts.

8. The audio-visual display device according to claim 7, characterized in that: The audio-visual synchronization algorithm module includes an audio preprocessing unit, a feature extraction unit, a light mapping unit, and a signal output unit that are connected in sequence. The audio preprocessing unit is used to filter and reduce noise in the audio signal. The feature extraction unit is used to extract the frequency, amplitude, beat, and rhythm features of the audio. The light mapping unit is used to generate the RGB values, brightness values, and refresh rate parameters of the LED beads based on the extracted feature mapping. The signal output unit is used to transmit the drive control signal to the cascaded LED light group template in real time.

9. The audio-visual display device according to claim 7, characterized in that: The audio output unit (7) is set one-to-one with the LED light group template. The audio output unit (7) is integrated on the substrate (1) of the corresponding LED light group template and is electrically connected to the sound and light synchronization interface module (32).

10. The audio-visual display device according to claim 7, characterized in that: The main control unit (6) also has a built-in splicing calibration module. The splicing calibration module can automatically identify the number of LED light group templates, physical arrangement position and inherent equipment parameters in the cascaded link, and automatically complete the brightness consistency calibration, color gamut calibration and synchronization clock calibration between multiple templates.

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