LED module having through channels and conforming to DCI certification standards, and display screen

Abstract

An LED module having through channels and conforming to DCI certification standards, and a display screen. The LED module comprises: a printed board (100), multiple first through channels (103) being formed in the printed board (100), a first conductive layer (104) being provided on an inner circumferential sidewall of each first through channel (103), conductive edges (105) corresponding one-to-one to the first through channels (103) being provided on each of two sides of the printed board (100), each conductive edge (105) surrounding the periphery of the corresponding first through channel (103) and being connected to the first conductive layer (104), and the first conductive layer (104) being grounded; a support structure (200), disposed opposite the printed board (100) and tightly connected to the printed board (100), the support structure having multiple second through channels (201), the support structure (200) being provided with a second conductive layer (202), and the second conductive layer (202) being grounded and abutting against the conductive edges (105). The problems of sound being blocked by an LED screen and data leakage risks are solved.

Description

DCI-certified LED modules and displays with through-channels

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 26, 2023, with application number 2023118352201 and invention name “LED module and display screen with through channel that complies with DCI certification standards”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of LED display technology, and in particular to an LED module and display screen having a through channel and complying with DCI certification standards. Background Art

[0003] In the traditional commercial cinema industry, cinema playback equipment usually uses a combination of projection equipment and projection screens to achieve image playback. With the development of technology, LED screen technology has gradually entered the market due to its higher brightness, better clarity, and low requirements for ambient brightness. Equipment that plays commercial films needs to meet the strict reliability technical testing (CTP, Compliance Test Plan) requirements of the international Digital Cinema Initiatives (DCI) standard to protect digital film copyrights and ensure the cinema's audio-visual experience. In addition, the cinema's playback equipment needs to meet the corresponding provisions of the Federal Information Processing Standards (FIPS) in the DCI to prevent signal leakage and ensure data security.

[0004] Movie playback is accompanied by the restoration and reproduction of video and audio. In order to ensure the audio-visual experience, the audio in the movie needs to be restored through the center speaker behind the screen. This requires the screen to minimize the loss of volume and sound quality when the sound passes through. The existing technology usually uses holes in the LED screen to reduce the obstruction of sound, thereby reducing the loss of sound quality and volume.

[0005] The above-mentioned prior art solution of opening holes in the LED screen to reduce sound obstruction cannot meet the requirements of the corresponding clauses of FIPS and has the risk of data leakage.

[0006] Therefore, the applicant proposed a solution of opening a through channel on the LED circuit printed board and providing a metallized conductive layer on the inside of the through channel. At the same time, a corresponding conductive layer is provided on the support structure for mounting the LED circuit printed board. When the support structure and the LED circuit printed board are tightly mounted, the conductive layer of the support structure abuts against the metallized conductive layer on the inside of the through channel to form an electrical connection, so that the two form an equipotential body, thereby preventing the leakage of signal electrical signals and thus reducing the risk of data leakage. However, in practice, the applicant found that due to factors such as the specific installation situation, there may be poor contact between the conductive layer of some through channels and the conductive layer of the support structure, resulting in the possibility of signal detection in some through channels, which is still prone to the risk of data leakage.

[0007] Summary of the Invention

[0008] In view of this, the present application provides an LED module and display screen with a through channel that complies with the DCI certification standard to solve the problem of reducing the LED screen's blockage of sound and the risk of data leakage, while also avoiding the risk of data leakage caused by poor contact.

[0009] In the first aspect, the present application provides an LED module, comprising: a printed circuit board, a plurality of LED light-emitting tubes are arranged on one side of the printed circuit board, a plurality of first through channels are opened on the printed circuit board, a first conductive layer is provided on the inner side wall of the first through channel, conductive edges corresponding to the first through channels are respectively provided on both sides of the printed circuit board, the conductive edges are laid from the periphery toward the direction of the first through channel and extend to the first conductive layer and are electrically connected to the first conductive layer, and the first conductive layer is grounded; a support structure, suitable for supporting the printed circuit board, having a plurality of second through channels opposite to the first through channels one by one, the support structure having a second conductive layer, the second conductive layer is grounded and abuts the conductive edges.

[0010] Beneficial effects: By setting relative first and second through-channels on the LED module, sound can pass through the through-channels, reducing the loss of sound quality and volume. By setting a first conductive layer on the inner peripheral side wall of the first through-channel and connecting it to the second conductive layer of the support structure and grounding it, each first conductive layer and the second conductive layer form an equipotential body. When the signal probe is inserted into the first through-channel and the second through-channel, no matter how the probe position and depth are changed, the signal cannot be detected, thereby effectively avoiding the risk of data leakage and making the module meet the corresponding clause requirements of FIPS. At the same time, by setting a conductive edge connected to the first conductive layer at the opening of the first through-channel on both sides of the printed circuit board, the electrical connection between the first conductive layer and the second conductive layer is maintained when the support structure is tightly connected to the printed circuit board, which greatly reduces the situation where the equipotential body cannot be formed between the local first conductive layer and the second conductive layer on the printed circuit board due to poor contact, and also avoids the situation where the grounding of the first conductive layer fails, providing reliable protection for data security. In addition, since the LED module is respectively provided with a first through channel and a second through channel, the LED module has good heat dissipation and exhaust functions, solving the fire smoke exhaust problem when the LED module is installed on a large area of ​​the interior wall of a building.

[0011] In an optional embodiment, the support structure is made of a conductive material to form the second conductive layer, or the surface of the support structure is metallized to form the second conductive layer.

[0012] Beneficial effect: The second conductive layer of the support structure can be formed by the support structure itself being made of conductive material and thus having conductive properties, or it can be formed by a conductive film made on the surface of the support structure made of non-conductive material through electroplating, deposition, lamination, etc., so that the components of the module have more optional options, which is convenient for adapting to different working environments and meeting different equipment requirements.

[0013] In an optional embodiment, the LED module further includes a mask layer, which is integrally provided with the printed circuit board and is located on a side of the printed circuit board away from the support structure. The first through-channel extends and passes through the mask layer. The mask layer is made of a conductive material and is electrically connected to the first conductive layer. The LED light-emitting tube passes through the mask layer.

[0014] Beneficial effect: By setting a mask layer, the surface of the printed circuit board with the LED light-emitting tube is shielded and protected. Since the mask layer and the printed circuit board are set as one piece, the LED module can have a smaller thickness, thereby further reducing the obstruction to sound and improving the sound quality passing through the LED module.

[0015] In an optional embodiment, the LED module further includes a mask layer, which is located on a side of the printed circuit board away from the support structure and is tightly connected to the printed circuit board, the mask layer having a plurality of third through channels that are opposite to the first through channels one by one, the mask layer having a third conductive layer, the third conductive layer being grounded and abutting against the conductive edge, and the mask layer having a clearance groove for the LED light-emitting tube to pass through.

[0016] Beneficial Effects: By providing a mask layer to shield and protect the surface of the printed circuit board with the LED light-emitting tubes, the separate design of the mask layer and the printed circuit board allows greater flexibility in component selection for the LED module and facilitates maintenance of the printed circuit board. The third through-channel is aligned with the first and second through-channels, ensuring the quality of sound transmission. At the same time, by providing a third conductive layer, electrically connecting the third conductive layer to the first conductive layer and grounding it, the first, second, and third conductive layers form a complete equipotential body, giving the entire LED module excellent signal shielding capabilities and further ensuring data security. The provision of a conductive edge also promotes good contact between the third conductive layer and the first conductive layer, further ensuring the grounding stability of the first conductive layer.

[0017] In an optional embodiment, the mask layer is made of a metal material to form the third conductive layer, or the mask layer is surface-metallized to form the third conductive layer.

[0018] Beneficial effect: The third conductive layer of the mask layer can be formed by the mask layer itself being made of conductive material and thus having conductive properties, or it can be formed by a conductive film made on the surface of the mask layer by electroplating, deposition, lamination, etc., so that the components of the module have more optional options, which is convenient for adapting to different working environments and meeting different equipment requirements.

[0019] In an optional embodiment, a plurality of connecting contacts are provided on the printed circuit board, and the plurality of connecting contacts are distributed on one side surface of the printed circuit board, or the plurality of connecting contacts are distributed on both side surfaces of the printed circuit board, and the connecting contacts are suitable for abutting against the second conductive layer or the third conductive layer.

[0020] Beneficial effect: By arranging connecting contacts on the surface of the printed circuit board and contacting the adjacent second conductive layer or third conductive layer, an electrical connection is formed between the printed circuit board and the mask layer or the supporting structure, or between the printed circuit board, the mask layer and the supporting structure. According to the specific structure and distribution position of the connecting contacts, the electrical connection is divided into single-point, multi-point or local electrical connection, thereby forming an equipotential body between the printed circuit board and the mask layer or the supporting structure, thereby making the equipotential body structure in the LED module that can shield the electrical signal more three-dimensional, greatly improving the signal shielding capability and improving data security.

[0021] In an optional embodiment, the cross-sectional shape of the first through-channel is a combination of one or more shapes selected from the group consisting of circular, polygonal, elliptical and kidney-shaped.

[0022] Beneficial effect: By adopting one or a combination of multiple shapes selected from the group consisting of circular, polygonal, elliptical and waist-shaped cross-sectional shapes of the first through-channel, the arrangement of the first through-channel on the printed circuit board is made more flexible, and the position and shape of the first through-channel can be flexibly arranged according to the differences in LED light-emitting tubes, driving components and circuits on different printed circuit boards, thereby maximizing the total area ratio of the first through-channel on the printed circuit board, thereby ensuring the sound transmission rate and sound quality.

[0023] In an optional embodiment, the ratio of the total area of ​​the plurality of first through channels to the area of ​​the printed circuit board is 1%-30%.

[0024] Beneficial effect: By ensuring that the total area of ​​the first through-channel on the printed circuit board is between 1% and 30%, excessive blocking of the center speaker sound is avoided, thereby ensuring the total amount and quality of sound passing through while ensuring the overall image quality.

[0025] In an optional embodiment, a driving element of the LED light-emitting tube is provided on the side of the printed circuit board facing away from the LED light-emitting tube, and an accommodating groove is provided at a position of the support structure opposite to the driving element, and the accommodating groove and the printed circuit board form an isolation space surrounding the driving element.

[0026] Beneficial effect: By providing an accommodating groove for accommodating the driving element on the support structure, a covering structure surrounding the driving element is formed between the printed circuit board and the support structure, thereby avoiding the possibility of signal leakage caused by leakage of the driving element, and also avoiding the possibility of the signal probe contacting the driving element from the support structure side and directly stealing the signal.

[0027] In an optional embodiment, a first trigger switch is provided between the support structure and the printed circuit board.

[0028] Beneficial effect: By setting a first trigger switch between the printed circuit board and the supporting structure, when the LED module is assembled, the first trigger switch is in a state of being triggered and pressed by the printed circuit board and the supporting structure. When the printed circuit board is illegally dismantled, the first trigger switch is triggered due to the loss of the pressing state, thereby adopting methods such as forcing the control system to forcibly interrupt signal transmission or issue an alarm to avoid data leakage caused by structural damage.

[0029] In the second aspect, the present application also provides an LED display screen, comprising: a plurality of frame-type boxes, the frame-type boxes are metal frames and are grounded, the plurality of frame-type boxes are spliced ​​in an array to form a display screen frame, and the long side length of the display screen frame is greater than or equal to 3 meters; a system electrical control box, installed on the inside of the frame-type box; the above-mentioned LED modules are provided in plurality and are respectively connected to the frame-type boxes, the support structure has a compressible conductive medium electrically connected to the second conductive layer, and the compressible conductive medium abuts against the frame-type box.

[0030] Beneficial Effects: The frame-type cabinet provides an installation base for the LED module. Because the frame-type cabinet utilizes a metal frame, when the first, second, and third conductive layers of the LED module are electrically connected to the frame-type cabinet, the LED module and the frame-type cabinet form an integral equipotential structure, thereby providing a comprehensive function of preventing signal leakage. Due to its compressibility, the compressible conductive medium can significantly reduce the requirements for installation precision of the LED module and improve the compatibility between the LED module and the frame-type cabinet. Furthermore, by providing a first through-channel on the printed circuit board, the sound blocking effect is reduced, allowing the sound from the center speaker behind the screen to be transmitted through the LED display screen for audio playback. Compared to methods that use sound reflection panels and channel synthesis to simulate a center speaker, this technology is less expensive and more adaptable because engineers do not need to individually design the speaker and channel layout based on the venue. This is especially true for larger venues, where channel synthesis cannot be used to simulate a center speaker. However, this technology is applicable to venues of all sizes.

[0031] In an optional embodiment, the system electric control box includes a box cover and a box body that are hinged to each other, and a safety anti-pry lock is provided between the box cover and the box body and a second trigger switch is provided.

[0032] Beneficial effects: The hinged design of the box cover and the box body facilitates the later maintenance and inspection of the system's electrical control box. The security anti-pry lock can reduce the possibility of the system's electrical control box being illegally opened. The second trigger switch causes the control system to issue an alarm or interrupt signal transmission when the system's electrical control box is illegally opened, thereby further improving the data security performance of the LED screen.

[0033] In an optional embodiment, the inner peripheral walls of the frame-type box and the peripheral side walls of the system electric control box are both paved with sound-absorbing materials.

[0034] Beneficial effect: By laying sound-absorbing materials in the frame box, the reflection of sound in the frame box can be effectively reduced, thereby reducing the distortion effect of the reflection on the sound and improving the sound quality.

[0035] In an optional embodiment, a joint kit is provided between adjacent frame-type boxes, the joint kit passes through the side walls of the two adjacent frame-type boxes, and a through hole is provided inside the joint kit that passes through the two adjacent frame-type boxes. The joint kit is made of conductive material and is electrically connected to the frame box.

[0036] Beneficial effect: By setting up a connector kit, the lines between adjacent frame boxes are wrapped and protected. The connector kit passes from one frame box into another frame box and forms an electrical connection structure with the frame box, thereby forming an equipotential body with the frame box, further preventing signal leakage at the cable connection and further providing protection for data security.

[0037] On the third aspect, the present application also provides an LED dome, comprising a plurality of frame-type boxes, the frame planes of the frame-type boxes being in a hyperbolic shape, the plurality of frame-type boxes being spliced ​​in an array to form a spherical display screen frame, and the diameter of the LED dome being greater than or equal to 3 meters; the above-mentioned LED modules are provided in plurality and are respectively connected to the frame-type boxes, the support structure having a compressible conductive medium electrically connected to the second conductive layer, and the compressible conductive medium abuts against the frame-type boxes.

[0038] Beneficial effects: The dome, also known as the ball screen, is a large curved display screen. The audio playback of the dome cannot use channel synthesis to simulate the center speaker behind or inside the screen. The LED dome of this technology uses a first through-channel to ensure the audio quality of the center speaker playback, thereby meeting the audio restoration requirements of the dome usage scenario and improving the adaptability of the dome playback equipment to the venue.

[0039] In a fourth aspect, the present application also provides an LED curved screen, comprising a mounting frame; a plurality of the above-mentioned LED modules, wherein the plurality of the LED modules are all mounted on the mounting frame and arranged in an arc shape.

[0040] Beneficial effect: The curved screen is formed by the curved arrangement of LED modules, which further enhances the diversity of screen usage scenarios and applicable sites and improves the practicality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0042] FIG1 is a cross-sectional view of a partial structure of an LED module according to an embodiment of the present application;

[0043] FIG2 is a schematic diagram of a partial structure of an LED module according to an embodiment of the present application, illustrating the positional relationship and structure between a printed circuit board, a mask layer, and a support structure;

[0044] FIG3 is a schematic diagram of a partial structure of an LED module according to another embodiment of the present application, illustrating the positional relationship and structure between a printed circuit board, a mask layer, and a support structure;

[0045] FIG4 is a schematic diagram of a cross-sectional structure of an LED module according to an embodiment of the present application;

[0046] FIG5 is a schematic diagram of detecting a signal in a through-channel of an LED module using a probe according to an embodiment of the present application;

[0047] FIG6 is a schematic diagram of the overall structure of an LED screen according to an embodiment of the present application;

[0048] FIG7 is a schematic structural diagram of a system electrical control box of an LED screen according to an embodiment of the present application.

[0049] FIG8 is a schematic diagram of an LED screen according to an embodiment of the present application, which is used to embody a splicing structure of multiple frame-type boxes;

[0050] FIG9 is a schematic cross-sectional view of a connector assembly structure for an LED screen at the end of a system electric control box according to an embodiment of the present application;

[0051] FIG10 is a schematic diagram of an LED screen according to an embodiment of the present application for embodying the structure of a conduit end connector kit;

[0052] FIG11 is a schematic diagram of a signal leakage prevention structure of an LED module according to an embodiment of the present application.

[0053] Explanation of the reference numerals: 100, printed circuit board; 101, LED light-emitting tube; 102, driving element; 103, first through-channel; 104, first conductive layer; 105, conductive edge; 106, connecting contact; 200, supporting structure; 201, second through-channel; 202, second conductive layer; 203, accommodating groove; 300, mask layer; 301, third through-channel; 302, third conductive layer; 303, make way groove; 400, frame-type box; 500, system electrical control box; 501, security anti-theft lock; 502, box body; 503, box cover; 600, sound-absorbing material; 700, probe; 800, second trigger switch; 900, wire conduit; 901, connector kit. DETAILED DESCRIPTION

[0054] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0055] With the development of technology, LED screens have gradually replaced projectors and projection screens as video playback equipment in commercial cinemas. Since the playback of movie videos is usually accompanied by audio playback, the audio playback process requires the cooperation of center speakers and other speakers to achieve high sound restoration and meet the audio-visual effects.

[0056] However, unlike projection screens, LED screens can significantly block sound, often impacting the center speaker's playback quality. Some commercial cinemas employ multi-channel synthesis to simulate the center speaker's main sound channel. For example, this involves synthesizing the main sound channel by reflecting the surrounding sound channels from the screen. However, this method suffers from significant sound loss due to screen reflection, resulting in poor performance. Furthermore, this method requires engineers to customize the sound synthesis process based on the theater and screen size, which is costly. Furthermore, this method fails to meet DCI requirements for a guaranteed cinematic audiovisual experience when used on large screens over 16 meters.

[0057] Another part of commercial cinemas uses perforated LED screens as playback devices, allowing the sound from the center speaker to pass through the perforations of the LED screen. However, this method will cause signal leakage from the LED screen, seriously affecting data security, and thus failing to meet the signal leakage requirements of FIPS in DCI.

[0058] Based on the above situation, this application proposes an LED module and LED display screen with a wide range of applications, few restrictions, and the ability to meet DCI requirements.

[0059] The following describes an embodiment of the present application with reference to FIG. 1 to FIG. 10 .

[0060] According to an embodiment of the present application, on the one hand, an LED module is provided, as shown in Figures 1 to 3, including: a printed circuit board 100 and a support structure 200, wherein a plurality of LED light-emitting tubes 101 are provided on one side of the printed circuit board 100, a plurality of first through-channels 103 are opened on the printed circuit board 100, a first conductive layer 104 is provided on the inner peripheral side wall of the first through-channel 103, and conductive edges 105 corresponding to the first through-channel 103 are provided on both sides of the printed circuit board 100, respectively. The conductive edges 105 are laid from the periphery toward the first through-channel 103 to the first conductive layer 104 and are electrically connected to the first conductive layer 104, and the first conductive layer 104 is grounded; the support structure 200 is suitable for supporting the printed circuit board 100, and has a plurality of second through-channels 201 corresponding to the first through-channels 103 one by one, and the support structure 200 has a second conductive layer 202, which is grounded and abuts against the conductive edges 105.

[0061] Specifically, LED light-emitting diodes 101 are arranged in an array and mounted on the surface of a printed circuit board 100. A conductive edge 105 surrounds and completely encloses the opening of the first through-channel 103. The conductive edge 105 at the same first through-channel 103 extends along the circumference of the first through-channel 103 and connects to the first conductive layer 104 to form a conductive whole. The support structure 200 has the same shape and structure as the printed circuit board 100. The second through-channel 201 has the same shape and size as the first through-channel 103 and is positioned directly opposite the first through-channel 103.

[0062] It should be noted that this embodiment does not limit the shape and size of the first through-channel 103. The cross-section of the first through-channel 103 can be slit-shaped. In some embodiments not shown, the shape of the first through-channel 103 can also be one or a combination of circular, polygonal, elliptical, and kidney-shaped, or other irregular shapes. As many first through-channels 103 as possible are provided while ensuring the strength of the printed circuit board 100 and the arrangement of the circuits, LED light-emitting diodes 101, and driver components 102. This maximizes the proportion of the total area of ​​the first through-channels 103 to the total area of ​​the printed circuit board 100, thereby improving the volume and quality of sound passing through the LED module.

[0063] It should be further explained that the shapes of different first through channels 103 may be different or the same.

[0064] In this embodiment, by providing opposing first and second through-channels 103 and 201 on the LED module, sound can pass through the through-channels, reducing sound quality and volume loss. By providing a first conductive layer 104 on the inner sidewall of the first through-channel 103 and connecting it to and grounding the second conductive layer 202 of the support structure 200, each first conductive layer 104 and second conductive layer 202 form an equipotential body. When a signal probe 700 is inserted into the first and second through-channels 103 and 201, no signal can be detected regardless of the position and depth of the probe 700. This effectively avoids the risk of data leakage and ensures that the module meets the relevant FIPS requirements. At the same time, by providing conductive edges 105 connected to the first conductive layer 104 at the openings of the first through-channel 103 on both sides of the printed circuit board 100, the electrical connection between the first conductive layer 104 and the second conductive layer 202 is maintained when the support structure 200 is tightly connected to the printed circuit board 100. This greatly reduces the possibility of poor contact resulting in the failure to form an equipotential body between the first conductive layer 104 and the second conductive layer 202 on the printed circuit board 100, and also avoids the failure of the first conductive layer 104 to be grounded, providing a reliable guarantee for data security. Furthermore, the provision of the first through-channel 103 and the second through-channel 201 on the LED module provides excellent heat dissipation and ventilation functions, solving the fire and smoke exhaust problem when the LED module is installed on a large area of ​​the interior wall of a building.

[0065] In one embodiment, the support structure 200 is made of a conductive material to form the second conductive layer 202 , or the surface of the support structure 200 is metallized to form the second conductive layer 202 .

[0066] In this embodiment, the second conductive layer 202 of the support structure 200 can be formed by the support structure 200 itself being made of a conductive material and thus having conductive properties, or it can be formed by a conductive film made on the surface of the support structure 200 by electroplating, deposition, lamination, etc., so that the components of the module have more optional options, which is convenient for adapting to different working environments and meeting different equipment requirements.

[0067] Please refer to Figure 2. In one embodiment, the LED module further includes a mask layer 300. The mask layer 300 is integrally provided with the printed circuit board 100 and is located on the side of the printed circuit board 100 away from the support structure 200. The first through channel 103 extends and passes through the mask layer 300. The mask layer 300 is made of a conductive material and is electrically connected to the first conductive layer 104. The LED light-emitting tube 101 passes through the mask layer 300.

[0068] Specifically, the mask layer 300 is made of a metal material and is integrally applied to the surface of the printed circuit board 100 through plating, coating, or other means, thereby tightly connecting with the conductive edge 105 and forming an equipotential body. For example, the mask layer 300 is copper-plated to form a copper film on the surface of the printed circuit board 100. Furthermore, the side of the mask layer 300 facing away from the printed circuit board 100 undergoes a conforming treatment to ensure that the surface color and light absorption of the mask layer 300 meet the requirements of LED screens.

[0069] In this embodiment, a mask layer 300 is provided to shield and protect the surface of the printed circuit board 100 having the LED light-emitting tube 101. Since the mask layer 300 and the printed circuit board 100 are integrally provided, the LED module can have a smaller thickness, thereby further reducing the obstruction to sound and improving the sound quality passing through the LED module.

[0070] Please refer to Figure 3. In one embodiment, the LED module further includes a mask layer 300. The mask layer 300 is located on a side of the printed circuit board 100 away from the support structure 200 and is tightly connected to the printed circuit board 100. The mask layer 300 has a plurality of third through-channels 301 that are opposite to the first through-channels 103 one by one. The mask layer 300 has a third conductive layer 302. The third conductive layer 302 is grounded and abuts against the conductive edge 105. The mask layer 300 is provided with a clearance groove 303 for the LED light-emitting tube 101 to pass through.

[0071] In this embodiment, a mask layer 300 is provided to shield and protect the surface of the printed circuit board 100 having the LED light-emitting tube 101. The separate design of the mask layer 300 and the printed circuit board 100 allows greater flexibility in component selection for the LED module and facilitates maintenance of the printed circuit board 100. The third through-channel 301 is aligned with the first through-channel 103 and the second through-channel 201, ensuring the quality of sound transmission. Furthermore, by providing a third conductive layer 302 and electrically connecting and grounding the third conductive layer 302 to the first conductive layer 104, a complete equipotential structure is formed, comprising the first conductive layer 104, the second conductive layer 202, and the third conductive layer 302. This provides the LED module with excellent signal shielding capabilities and further ensures data security. The provision of the conductive edge 105 also enhances contact between the third conductive layer 302 and the first conductive layer 104, further ensuring the grounding stability of the first conductive layer 104.

[0072] In some of the above embodiments, the mask layer 300 , the printed circuit board 100 and the support structure 200 are tightly combined, so that the overall thickness of the LED module is less than or equal to 5 mm, thereby making the LED module thinner and having good sound transmission performance.

[0073] In one embodiment, the mask layer 300 is made of a metal material to form the third conductive layer 302 , or the mask layer 300 is surface-metallized to form the third conductive layer 302 .

[0074] In this embodiment, the third conductive layer 302 of the mask layer 300 can be formed by the mask layer 300 itself being made of a conductive material and thus having conductive properties, or it can be formed by a conductive film made on the surface of the mask layer 300 by electroplating, pasting or coating, etc., so that the components of the module have more optional options, which is convenient for adapting to different working environments and meeting different equipment requirements.

[0075] In one embodiment, a plurality of connecting contacts 106 are provided on the printed circuit board 100 , and the plurality of connecting contacts 106 are distributed on one side of the printed circuit board 100 , or the plurality of connecting contacts 106 are distributed on both sides of the printed circuit board 100 , and the connecting contacts 106 are suitable for abutting against the second conductive layer 202 or the third conductive layer 302 .

[0076] Specifically, the connecting contacts 106 can be distributed on the side of the printed circuit board 100 facing the mask layer 300, or on the side of the printed circuit board 100 facing the support structure 200, or on both sides of the printed circuit board 100. Each connecting contact 106 is respectively in contact with the second conductive layer 202 or the third conductive layer 302 facing the surface of the printed circuit board 100.

[0077] It should be noted that this embodiment does not limit the specific shape of the connecting contacts 106. The cross-section of the connecting contacts 106 can be disc-shaped. In some embodiments not shown, it can also be polygonal, elliptical, irregular, etc. In addition, this embodiment does not limit the specific distribution of the connecting contacts 106. The connecting contacts 106 can be freely arranged according to the specific location of the LED light-emitting tube 101 and the specific location of the driving element 102.

[0078] In this embodiment, by providing a connecting contact 106 on the surface of the printed circuit board 100 to abut against the adjacent second conductive layer 202 or third conductive layer 302, an electrical connection is formed between the printed circuit board 100 and the mask layer 300 or the support structure 200, or between the printed circuit board 100, the mask layer 300 and the support structure 200. Depending on the specific structure and distribution position of the connecting contact 106, the electrical connection is divided into a single-point, multi-point or local electrical connection, thereby forming an equipotential body between the printed circuit board 100 and the mask layer 300 or the support structure 200, thereby making the equipotential body structure capable of shielding electrical signals in the LED module more three-dimensional, greatly improving the signal shielding capability, and improving data security.

[0079] In one embodiment, the cross-sectional shape of the first through channel 103 is a combination of one or more shapes selected from the group consisting of a circle, a polygon, an ellipse, and a waist.

[0080] Specifically, the total area of ​​the first through-channels 103 on the printed circuit board 100 is between 1% and 60%. Furthermore, by adopting a cross-sectional shape of one or more of a circular, polygonal, elliptical, and waist-shaped shape, the placement of the first through-channels 103 on the printed circuit board 100 is more flexible, facilitating flexible arrangement of the position and shape of the first through-channels 103 based on the differences in the LED light-emitting tubes 101, driver components, and circuits on different printed circuit boards 100. This maximizes the total area of ​​the first through-channels 103 on the printed circuit board 100, thereby ensuring sound transmission and quality. Exemplarily, the total area of ​​the first through-channels 103 on the printed circuit board 100 is between 1% and 30%, avoiding excessive obstruction of the center speaker's sound, thereby ensuring overall image quality while also ensuring the total amount and quality of sound transmission.

[0081] Referring to Figures 4 and 5, in one embodiment, a driving element 102 of the LED light-emitting tube 101 is provided on the side of the printed circuit board 100 facing away from the LED light-emitting tube 101, and an accommodating groove 203 is provided at a position of the support structure 200 opposite to the driving element 102. The accommodating groove 203 and the printed circuit board 100 form an isolation space surrounding the driving element 102.

[0082] In this embodiment, a receiving groove 203 for accommodating the driving element 102 is provided on the support structure 200, so that a covering structure surrounding the driving element 102 is provided between the printed circuit board 100 and the support structure 200, thereby avoiding the possibility of leakage of the driving element 102 and causing leakage of the signal, and also avoiding the possibility of the signal probe 700 contacting the driving element 102 from the support structure 200 side and directly stealing the signal.

[0083] In one embodiment, a first trigger switch is provided between the support structure 200 and the printed circuit board 100 .

[0084] Specifically, the first trigger switch can be a micro switch or an electrical contact switch. The first trigger switch is electrically connected to the screen control system to send a signal to the screen control system. The first trigger switch can be mounted on the support structure 200 or on the printed circuit board 100. The specific mounting location of the first trigger switch on the support structure 200 or on the printed circuit board 100 is not limited.

[0085] In this embodiment, a first trigger switch is provided between the printed circuit board 100 and the supporting structure 200. When the LED module is assembled, the first trigger switch is in a state of being triggered and pressed by the printed circuit board 100 and the supporting structure 200. When the printed circuit board 100 is illegally dismantled, the first trigger switch is triggered due to the loss of the pressed state, thereby preventing data leakage caused by structural damage by forcibly interrupting signal transmission or issuing an alarm.

[0086] In some of the above embodiments, specifically, the conductive material may be copper, or other metal materials, or other non-metallic materials that can constitute an electrostatic shielding layer. Exemplarily, the non-metallic material may be a graphene material.

[0087] According to an embodiment of the present application, on the other hand, an LED display screen is also provided, please refer to Figures 6 and 7, including: a plurality of frame-type boxes 400, the frame-type boxes 400 are metal frames and are grounded, and the plurality of frame-type boxes 400 are spliced ​​in an array to form a display screen frame, and the long side length of the display screen frame is greater than or equal to 3 meters; a system electrical control box 500, which is installed on the inner side of the frame-type box 400; the above-mentioned LED modules are provided in plurality and are respectively connected to the frame-type boxes 400, and the support structure 200 has a compressible conductive medium electrically connected to the second conductive layer 202, and the compressible conductive medium is in contact with the frame-type box 400.

[0088] Specifically, the frame-type housing 400 is a metal housing, which can be a profile frame or a sheet metal frame. The frame-type housing 400 is grounded and has multiple grilles (not shown) inside for mounting LED modules. The grilles provide a mounting base for the LED modules and also facilitate grounding of the LED modules by electrically connecting them to the frame-type housing 400.

[0089] It should be noted that the compressible conductive medium may be an elastic conductive sheet or other elastic conductive parts.

[0090] In addition, specifically, the length of the LED display screen can be selected according to the actual site requirements. For example, the length of the LED display screen is 10 meters, 16 meters or 20 meters. The aspect ratio of the LED display screen can be set according to the site or industry specifications. For example, the aspect ratio is 1.85:1, or the aspect ratio is 2.35:1.

[0091] In this embodiment, the frame-type box 400 provides an installation base for the LED module, and since the frame-type box 400 adopts a metal frame, when the first conductive layer 104, the second conductive layer 202 and the third conductive layer 302 of the LED module are electrically connected to the frame-type box 400, the LED module and the frame-type box 400 form an overall equipotential body structure, thereby having an overall function of preventing signal leakage. Due to its compressibility, the compressible conductive medium can greatly reduce the requirements of the LED module for installation accuracy and improve the adaptability between the LED module and the frame-type box 400. In addition, by opening a first through channel 103 on the printed circuit board 100, the sound blocking effect is reduced, so that the sound of the center speaker behind the screen can achieve an audio playback effect through the LED display. Compared with the method of using sound reflection panels and channel synthesis to simulate the center speaker, this technology does not require engineers to separately design the speakers and channel layout according to the situation of the viewing venue. Therefore, it is cheaper and more adaptable. In particular, when the viewing venue is large, channel synthesis cannot be used to simulate the center speaker, but this technology can be applied to viewing venues of various sizes.

[0092] In one embodiment, the system electric control box 500 includes a box cover 503 and a box body 502 that are hinged to each other. A security anti-theft lock 501 is provided between the box cover 503 and the box body 502 and a second trigger switch 800 is provided.

[0093] Specifically, the second trigger switch 800 can be a micro switch or an electrical contact switch, and is electrically connected to the screen control system. The second trigger switch 800 is disposed at the security anti-pry lock 501. When the security anti-pry lock 501 is disengaged from the lock on the cover, the second trigger switch begins to operate.

[0094] In this embodiment, the hinged design of the box cover 503 and the box body 502 facilitates the later maintenance and inspection of the system electrical control box 500. The security anti-theft lock 501 can reduce the possibility of the system electrical control box 500 being illegally opened. The second trigger switch 800 causes the control system to issue an alarm or interrupt signal transmission when the system electrical control box 500 is illegally opened, thereby further improving the data security performance of the LED screen.

[0095] In one embodiment, the inner peripheral wall of the frame-type box 400 and the peripheral side wall of the system electric control box 500 are both paved with sound-absorbing materials 600 .

[0096] Specifically, the sound-absorbing material 600 may be sound-absorbing cotton, or other materials with sound-absorbing effects.

[0097] In addition, it should be noted that when the LED display screen is used in a cinema, a movie server needs to be installed behind the LED display screen to realize the movie playback function.

[0098] In this embodiment, by laying the sound-absorbing material 600 in the frame-type box 400, the reflection of sound in the frame-type box 400 can be effectively reduced, thereby reducing the distortion effect of the reflection on the sound and improving the sound quality.

[0099] In one embodiment, referring to Figures 8 to 10, a connector kit 901 is provided between adjacent frame boxes 400. The connector kit 901 passes through the side walls of the two adjacent frame boxes 400, and a through hole is provided inside the connector kit 901 that passes through the two adjacent frame boxes 400. The connector kit 901 is made of conductive material and is electrically connected to the frame boxes 400.

[0100] Specifically, this embodiment does not limit the specific form of the connector kit 901. Any connector kit 901 that can surround the cables between adjacent frame-type boxes 400 and prevent signal leakage should be within the protection scope of this embodiment. For example, the connector kit 901 system electrical control box is arranged along the length direction or width direction of the LED screen, and the system electrical control box is connected to a number of threading tubes 900 arranged perpendicular to the system electrical control box. The connector kit 901 is arranged at the end of the system electrical control box and the end of the threading tube 900. The connector kit 901 arranged at the end of the system electrical control box is respectively passed into the system electrical control box in the adjacent frame-type box 400, thereby avoiding exposure of the cables. The connector kit 901 arranged at the end of the threading tube 900 is a part of the threading tube 900, extending from the end of the threading tube 900 and extending into the threading tube 900 of the adjacent frame-type box 400, achieving complete encirclement of the cables and thus preventing signal exposure.

[0101] In this embodiment, by providing a connector kit 901, the lines between adjacent frame boxes 400 are wrapped and protected. The connector kit 901 passes through one frame box 400 into another frame box 400 and forms an electrical connection structure with the frame box 400, thereby forming an equipotential body with the frame box 400, further preventing signal leakage at the cable connection and further providing protection for data security.

[0102] In one embodiment, see Figure 11 for a schematic diagram of the LED module signal leakage prevention structure. All visible fastener heads on the exterior of the LED module are protected against tampering, using methods such as adhesive dispensing and special-shaped fastener heads. The LED display is assembled from N × M (N and M are both positive rational numbers) LED modules. A connecting device is installed within adjacent LED modules on the left and right. This connecting device is mounted on the connector of the microswitch within the system's electrical control box. This connecting device is an externally insulated, high-strength, flexible connection device, such as a rubber-coated steel wire rope.

[0103] According to an embodiment of the present application, in another aspect, an LED dome is provided, comprising a plurality of frame-type boxes 400, wherein the frame planes of the frame-type boxes 400 are arc-shaped, and the plurality of frame-type boxes 400 are spliced ​​together in an array to form an arc-shaped display screen frame, wherein the long side length of the display screen frame is greater than or equal to 3 meters;

[0104] The above-mentioned LED modules are provided in plurality and are respectively connected to the frame-type box 400 . The support structure 200 has a compressible conductive medium electrically connected to the second conductive layer 202 , and the compressible conductive medium abuts against the frame-type box 400 .

[0105] According to an embodiment of the present application, on the other hand, an LED curved screen, a mounting frame and a plurality of the above-mentioned LED modules are also provided. The plurality of LED modules are all mounted on the mounting frame and arranged in an arc shape.

[0106] In this embodiment, a curved screen is formed by arranging the LED modules in a curved surface, which further increases the diversity of screen usage scenarios and applicable sites and improves the practicality of the product.

[0107] Although the embodiments of the present application have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. An LED module, characterized in that, Including: A printed circuit board (100), on one side of which there are a plurality of LED light-emitting diodes (101). A plurality of first through-channels (103) are formed on the printed circuit board (100). The inner peripheral side wall of the first through-channel (103) has a first conductive layer (104). On both sides of the printed circuit board (100), there are conductive edges (105) corresponding to the first through-channels (103). The conductive edges (105) are laid and extended from the periphery towards the first through-channel (103) to the first conductive layer (104) and are electrically connected to the first conductive layer (104), and the first conductive layer (104) is grounded; A support structure (200), adapted to support the printed circuit board (100), having a plurality of second through-channels (201) corresponding one-to-one to the first through-channels (103). The support structure (200) has a second conductive layer (202), and the second conductive layer (202) is grounded and abuts against the conductive edge (105).

2. The LED module according to claim 1, characterized in that, The support structure (200) is made of a conductive material to form the second conductive layer (202), or the surface of the support structure (200) is metallized to form the second conductive layer (202).

3. The LED module according to claim 1, characterized in that, The LED module further includes a mask layer (300). The mask layer (300) is integrally provided with the printed circuit board (100) and is located on the side of the printed circuit board (100) away from the support structure (200). The first through-channel (103) extends and penetrates through the mask layer (300). The mask layer (300) is made of a conductive material and is electrically connected to the first conductive layer (104). The LED light-emitting diode (101) passes through the mask layer (300).

4. The LED module according to claim 1, wherein The LED module further includes a mask layer (300). The mask layer (300) is located on the side of the printed circuit board (100) away from the support structure (200) and is tightly connected to the printed circuit board (100). The mask layer (300) has a plurality of third through-channels (301) corresponding one-to-one to the first through-channels (103). The mask layer (300) has a third conductive layer (302). The third conductive layer (302) is grounded and abuts against the conductive edge (105). The mask layer (300) is provided with a relief groove (303) for the LED light-emitting diode (101) to pass through.

5. The LED module according to claim 4, characterized in that, The mask layer (300) is made of a metal material to form the third conductive layer (302), or the surface of the mask layer (300) is metallized to form the third conductive layer (302).

6. The LED module according to claim 5, wherein, A plurality of connecting contacts (106) are provided on the printed circuit board (100). The plurality of connecting contacts (106) are distributed on one side surface of the printed circuit board (100), or the plurality of connecting contacts (106) are distributed on both side surfaces of the printed circuit board (100). The connecting contacts (106) are adapted to abut against the second conductive layer (202) or the third conductive layer (302).

7. The LED module according to any one of claims 1 to 6, characterized in that, The cross-sectional shape of the first through-channel (103) is one or a combination of shapes including circular, polygonal, elliptical, and kidney-shaped.

8. The LED module according to claim 7, wherein, The ratio of the total area of the multiple first through-channels (103) to the area of the printed circuit board (100) is 1% - 30%.

9. The LED module according to claim 1, wherein On the side of the printed circuit board (100) facing away from the LED light-emitting tube (101), a driving element (102) of the LED light-emitting tube (101) is provided. At a position of the support structure (200) opposite to the driving element (102), a receiving groove (203) is provided, and the receiving groove (203) and the printed circuit board (100) form an isolation space surrounding the driving element (102).

10. The LED module according to claim 9, characterized in that, A first trigger switch is provided between the support structure (200) and the printed circuit board (100).

11. An LED display screen, characterized in that, Comprising: Multiple frame-type boxes (400), the frame-type boxes (400) are metal frames and are grounded, and the multiple frame-type boxes (400) Are spliced into a display screen frame in an array pattern, and the length of the long side of the display screen frame is greater than or equal to 3 meters; A system electronic control box (500), installed inside the frame-type box (400); The LED module according to any one of claims 1 to 10, provided with a plurality of them and respectively connected to the frame-type box (400), and a compressible conductive medium electrically connected to the second conductive layer (202) is provided on the support structure (200), and the compressible conductive medium abuts against the frame-type box (400).

12. The LED display screen according to claim 11, characterized in that, The system electronic control box (500) includes a box cover (503) and a box body (502) that are hinged to each other. A safety anti-pry lock (501) is provided between the box cover (503) and the box body (502) and has a second trigger switch (800).

13. The LED display screen according to claim 11, characterized in that, Sound-absorbing materials (600) are laid on the inner peripheral walls of the frame-type box (400) and the peripheral side walls of the system electronic control box (500).

14. The LED display according to claim 11, wherein, A joint kit (901) is provided between adjacent frame-type boxes (400). The joint kit (901) penetrates the side walls of two adjacent frame-type boxes (400), and a through-hole penetrating two adjacent frame-type boxes (400) is provided inside the joint kit (901). The joint kit (901) is made of a conductive material and is electrically connected to the frame-type box (400).

15. The LED display screen according to claim 11, wherein All visible fastener heads on the outside of the LED module are anti-pry treated.

16. An LED dome screen, characterized in that, Comprising: Multiple frame-type boxes (400), the frame plane of the frame-type box (400) is hyperbolic, and the multiple frame-type boxes (400) are spliced into a spherical display screen frame in an array pattern, and the diameter of the LED dome screen is greater than or equal to 3 meters; The LED module according to any one of claims 1 to 10, provided with a plurality of them and respectively connected to the frame-type box (400), and a compressible conductive medium electrically connected to the second conductive layer (202) is provided on the support structure (200), and the compressible conductive medium abuts against the frame-type box (400).

17. An LED arc screen, characterized in that, Comprising: A mounting bracket; Multiple LED modules according to any one of claims 1 to 10, wherein multiple said LED modules are all mounted on the mounting bracket and are arranged in an arc shape.

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