Sound transmission assembly and sound transmission LED movie screen

Abstract

The invention relates to the technical field of LED screens, and discloses a sound transmission assembly and a sound transmission LED movie screen, and the sound transmission assembly comprises a sound transmission display unit, a medium-high frequency loudspeaker unit and a safety link protection unit. The medium-high frequency loudspeaker unit is arranged on the rear side of the sound transmission display unit; the safety link protection unit comprises a safety link protection shell and a safety link protection link; when the safety link protection shell is closed, the sound transmission display unit and the medium-high frequency loudspeaker unit are packaged into a whole. When the safety link protection shell is opened, the safety link protection link is triggered to transmit a protection signal to the LED projection system, so that the LED projection system stops projection; wherein the safety link protection link is connected with the LED projection system. The sound transmission assembly provided by the invention is protected by the safety link protection unit, and projection is stopped once the safety link protection shell is manually opened and damaged, so that the projection content of the LED screen is effectively prevented from being stolen and recorded through the sound transmission assembly.

Description

Technical Field

[0001] The present application relates to the technical field of LED screens, and in particular to a sound-transmitting component and a sound-transmitting LED movie screen. Background Art

[0002] LED movie screens for digital movie projection can be non-sound-transparent LED movie screens and sound-transparent LED movie screens. Since non-sound-transparent LED movie screens use non-sound-transparent components that do not have a sound-transparent effect, the main channel speaker system cannot be installed behind the screen according to the traditional screen mode, and can only be installed around the screen. Then, through virtual control technologies such as sound and image, delay, etc., a sound reproduction effect that is relatively consistent with the sound and image position of the traditional screen is processed. The sound-transparent LED movie screen uses sound-transparent components with a certain sound-transparent effect in the main channel sound reproduction area or the entire screen, so that the main channel speaker system is installed in the same position as the traditional screen, which can achieve a sound reproduction effect consistent with the sound and image of the traditional screen projection.

[0003] However, for sound-transparent LED movie screens, the existing main channel speaker system is usually placed directly behind the sound-transparent display unit. The sound-transparent display unit does not have any link security protection measures, which can easily lead to serious consequences such as digital movie theft. Summary of the invention

[0004] In order to solve the above problems, the present application provides a sound-transmitting component and a sound-transmitting LED movie screen to improve the protection level of digital movie projection.

[0005] This application adopts the following technical solutions:

[0006] In a first aspect, the present application provides a sound-transmitting assembly, the sound-transmitting assembly comprising: a sound-transmitting display unit, a mid-high frequency speaker unit, and a safety link protection unit;

[0007] The mid-high frequency speaker unit is arranged at the rear side of the sound-transmitting display unit;

[0008] The safety link protection unit comprises: a safety link protection shell and a safety link protection link;

[0009] When the safety link protective shell is closed, the sound-transparent display unit and the mid-high frequency speaker unit are encapsulated as one;

[0010] When the safety link protection shell is opened, the safety link protection link is triggered to transmit a protection signal to the LED projection system to stop the LED projection system; wherein, the safety link protection link is connected to the LED projection system.

[0011] Optionally, the sound-transmitting display unit comprises: a plurality of sound-transmitting display modules and a mounting frame;

[0012] A plurality of sound-transmitting display modules are spliced ​​into a sound-transmitting display unit through a mounting frame.

[0013] Optionally, each sound-transmitting display module includes: a printed circuit board, a plurality of lamp beads, a driving circuit, at least one driving chip and a plurality of sound-transmitting holes;

[0014] A plurality of lamp beads are evenly arrayed and embedded in the front side of the printed circuit board, each lamp bead is connected to a driver chip through a driver circuit, at least one driver chip is embedded in the back side of the printed circuit board, and a plurality of sound-permeable holes are provided at positions of the printed circuit board where lamp beads, driver chips, driver circuits, and mounting frames are not blocked;

[0015] The distance between adjacent lamp beads is not less than 4 mm, and the opening rate of the multiple sound-transmitting holes is not less than 6.43% and not more than 6.85%.

[0016] Optionally, the multiple sound-transmitting holes are composed of multiple circular sub-holes or at least one oblong sub-hole, the minimum circumscribed area of ​​each sound-transmitting hole is an oblong formed by smooth circumscribed semicircles at both ends of a rectangle, and the diameter of the semicircle of the minimum circumscribed area of ​​each sound-transmitting hole is not less than 1 mm.

[0017] Optionally, the mid-high frequency speaker unit includes: a mid-high frequency speaker module and a sound image adjustment device;

[0018] The mid-high frequency speaker module is arranged at the rear side of the sound-transmitting display unit, and the mid-high frequency speaker module is connected to the sound image adjustment device;

[0019] The sound image adjustment device is used to drive the mid-high frequency speaker module to achieve left-right and up-down rotation.

[0020] Optionally, the mid-high frequency speaker module includes: a plurality of mid-high frequency speaker sub-modules arranged in a uniform array; each mid-high frequency speaker sub-module includes: a high frequency speaker module and a mid-frequency speaker module; the high frequency speaker module is arranged above the mid-frequency speaker module.

[0021] Optionally, the diameter of the minimum circumscribed circle of each mid-high frequency speaker submodule is less than 8 inches.

[0022] In a second aspect, the present application provides a sound-transmitting LED movie screen, which includes: a box support, a plurality of the above-mentioned sound-transmitting components, a plurality of non-sound-transmitting components and a low-frequency speaker unit;

[0023] The box support includes a plurality of adjacent installation cavities, and a plurality of sound-transmitting components and a plurality of non-sound-transmitting components are arranged in the corresponding plurality of installation cavities and spliced ​​to form a screen;

[0024] The low-frequency speaker unit corresponds vertically to the mid- and high-frequency speaker units and is arranged below the screen.

[0025] Optionally, there are three sound-transmitting components, which are respectively arranged in the left channel mounting cavity, the center channel mounting cavity and the right channel mounting cavity of the box bracket; non-sound-transmitting components are arranged in other mounting cavities of the box bracket.

[0026] Optionally, there are five sound-transparent components, which are respectively arranged in the left channel mounting cavity, left center channel mounting cavity, center channel mounting cavity, right center channel mounting cavity and right channel mounting cavity of the box bracket; non-sound-transparent components are arranged in other mounting cavities of the box bracket.

[0027] The above technical solution adopted in this application can achieve the following beneficial effects:

[0028] The sound-transmitting assembly provided by the present application is protected by a safety link protection unit. Once the safety link protection shell is opened and damaged manually, the projection is stopped, thereby effectively preventing the projection content of the LED screen from being stolen through the sound-transmitting assembly. In the sound-transmitting assembly provided by the present application, multiple sound-transmitting display modules are fixed on the mounting frame in a block-type installation manner, and the support position of the mounting frame can avoid the key areas of each sound-transmitting display module (including the area where multiple lamp beads are inlaid and the area where sound-transmitting holes are opened, etc.), thereby avoiding the support position from blocking the sound waves. In the sound-transmitting assembly provided by the present application, multiple mid-high frequency speaker submodules are arranged in a uniform array, and the same sound pressure effect as the high-power and large-size mid-high frequency speaker unit used in the prior art can be obtained while reducing the size of each mid-high frequency speaker submodule. The sound-transmitting assembly provided by the present application can increase the effective sound-transmitting area of ​​the sound-transmitting display module, improve the sound-transmitting effect, and reduce the attenuation and harmonic distortion of the sound after passing through the sound-transmitting display module. The sound-transmitting assembly provided by the present application can adjust the sound field coverage of the mid-high frequency speaker module in the audience area according to demand, and effectively improve the sound field uniformity of each area of ​​the audience area. The sound-transmitting assembly provided by the present application is convenient and quick to install and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0030] Figure 1 A schematic diagram showing the three-dimensional structure of a sound-transmitting component according to an embodiment of the present application is shown;

[0031] Figure 2 An exploded view of the structure of a sound-transmitting component according to an embodiment of the present application is shown;

[0032] Figure 3 An exploded view of the structure of a sound-transmitting display unit according to an embodiment of the present application is shown;

[0033] Figure 4A schematic diagram of the front structure of a sound-transparent display module according to an embodiment of the present application is shown;

[0034] Figure 5 A schematic diagram of the rear structure of a sound-transmitting display module according to an embodiment of the present application is shown;

[0035] Figure 6 A schematic diagram showing the structure of a sound-permeable hole according to an embodiment of the present application is shown;

[0036] Figure 7 A schematic diagram showing the sound attenuation of each frequency band of a sound-transmitting component according to another embodiment of the present application;

[0037] Figure 8 A schematic diagram showing harmonic distortion coefficients of various frequency bands of a sound-transmitting component according to another embodiment of the present application is shown;

[0038] Fig. 9 A schematic diagram showing the structure of a screen according to an embodiment of the present application;

[0039] Fig.10 A schematic diagram showing the structure of a screen according to another embodiment of the present application;

[0040] In the figure: 1. Sound-transmitting display unit, 2. Mid-high frequency speaker unit, 3. Safety link protection unit, 11. Sound-transmitting display module, 12. Mounting frame, 111. Printed circuit board, 112. Lamp beads, 113. Driving circuit, 114. Driving chip, 115. Sound-transmitting hole, 1151. Oblong sub-hole, 1152. Circular sub-hole, 31. Safety link protection shell, 32. Safety link protection link, A. Sound-transmitting component, B. Non-sound-transmitting component. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only 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 ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0042] Figures 1 to 6 The structure diagram of the sound-transmitting component (A) and its various units proposed in the present application is shown. Figures 7 and 8 A performance diagram of the sound-transmitting component (A) proposed in this application is shown. Figures 9 and 10 The structural diagram of the LED movie screen proposed in this application is shown.

[0043] In a first aspect, the present application provides a sound-transmitting component (A).

[0044] Figure 1 FIG. 1 shows a schematic diagram of the three-dimensional structure of a sound-transmitting component (A) proposed in one embodiment of the present application. Figure 1 In the diagram, the z-axis is used as the forward direction (i.e. the reverse direction of the z-axis is used as the backward direction), the y-axis is used as the upward direction (i.e. the reverse direction of the y-axis is used as the downward direction), and the x-axis is used as the rightward direction (i.e. the reverse direction of the x-axis is used as the leftward direction).

[0045] Reference Figure 1 As shown, the sound-transmitting assembly (A) proposed in this embodiment includes: a sound-transmitting display unit (1), a mid-high frequency speaker unit (2) and a safety link protection unit (3);

[0046] The mid-high frequency speaker unit (2) is arranged at the rear side of the sound-transmitting display unit (1);

[0047] The safety link protection unit (3) comprises: a safety link protection shell (31) and a safety link protection link (32);

[0048] When the safety link protection shell (31) is closed, the sound-transmitting display unit (1) and the mid-high frequency speaker unit (2) are encapsulated as one;

[0049] When the safety link protection shell (31) is opened, the safety link protection link (32) is triggered to transmit a protection signal to the LED projection system so that the LED projection system stops projection; wherein the safety link protection link (32) is connected to the LED projection system.

[0050] In the prior art, the sound-transmitting component (A) is usually composed of a sound-transmitting display unit (1) and a mid-high frequency speaker unit (2). The mid-high frequency speaker unit (2) is directly placed on the rear side of the sound-transmitting display unit (1), so that the sound-transmitting display unit (1) has no link security protection measures, which may easily lead to serious consequences of digital movie piracy. Therefore, the embodiment of the present application proposes a security link protection unit (3), which includes a security link protection shell (31) and a security link protection link (32).

[0051] The safety link protection shell (31) may be a concave shell. The safety link protection shell (31) may include a first lock buckle, and the rear side of the corresponding sound-transmitting display unit (1) may include a second lock buckle corresponding to the first lock buckle at a corresponding position. The safety link protection link (32) may be arranged on the first lock buckle and the second lock buckle.

[0052] When the first lock buckle and the second lock buckle are locked, the safety link protection shell (31) of the concave shell can be buckled on the rear side of the sound-transmitting display unit (1), and the mid-high frequency speaker unit (2) is accommodated in the concave. At this time, the safety link protection shell (31) is closed, and the sound-transmitting display unit (1) and the mid-high frequency speaker unit (2) are packaged as a whole due to the safety link protection shell (31). The safety link protection link (32) can be in a connected state at this time, indicating that the safety link protection shell (31) is closed and does not send any signal.

[0053] When the first lock buckle and the second lock buckle are released, the safety link protection shell (31) of the concave housing is separated from the rear side of the sound-transmitting display unit (1), and the safety link protection shell (31) is opened. The safety link protection link (32) can be in a disconnected state at this time, indicating that the safety link protection shell (31) is opened, and a protection signal is transmitted to the LED projection system.

[0054] The protection signal is used to instruct the LED projection system to stop projection. If the projection is in progress, the projection will be paused immediately; if it is not in progress, the projection will not be started. The LED projection system can also record relevant logs.

[0055] The connection between the safety link protection link (32) and the LED projection system can be a wireless connection.

[0056] The above-mentioned sound-transmitting component (A) can improve the protection level of digital movie projection and prevent the projection content of the LED screen from being recorded illegally through the sound-transmitting component.

[0057] Figure 2 An exploded view of the structure of a sound-transmitting component (A) provided in one embodiment of the present application is shown; Figure 3 The structure explosion diagram of the sound-transmitting display unit (1) proposed in one embodiment of the present application is shown. Figure 2 and Figure 3 In the diagram, the z-axis is used as the forward direction (i.e. the reverse direction of the z-axis is used as the backward direction), the y-axis is used as the upward direction (i.e. the reverse direction of the y-axis is used as the downward direction), and the x-axis is used as the rightward direction (i.e. the reverse direction of the x-axis is used as the leftward direction).

[0058] Reference Figure 2 and Figure 3 As shown, in some optional embodiments, the sound-transmitting display unit (1) comprises: a plurality of sound-transmitting display modules (11) and a mounting frame (12);

[0059] A plurality of sound-transmitting display modules (11) are spliced ​​into a sound-transmitting display unit (1) via a mounting frame (12).

[0060] In the prior art, in order to obtain sufficient sound pressure in the audience area of ​​the theater, it is necessary to use a large-sized mid-high frequency speaker unit (2) that can withstand high power. The sound-transmitting display unit (1) in front of the mid-high frequency speaker unit (2) needs to have a large horizontal and / or vertical size. Therefore, the embodiment of the present application proposes a plurality of sound-transmitting display modules (11).

[0061] A plurality of sound-transmitting display modules (11) are fixed on a mounting frame (12) in a block-type mounting manner. The mounting frame (12) can fix the four sides of each sound-transmitting display module (11), so that the plurality of sound-transmitting display modules (11) are spliced ​​into a sound-transmitting display unit (1). The supporting position of the mounting frame (12) can avoid key areas of each sound-transmitting display module (11) (which may include areas where a plurality of lamp beads (112) are embedded and areas where sound-transmitting holes (115) are provided, etc.), so as to avoid the support position from blocking sound waves.

[0062] Figure 4 A schematic diagram of the front structure of a sound-transmitting display module (11) proposed in one embodiment of the present application is shown; Figure 5 A schematic diagram of the rear structure of a sound-transmitting display module (11) proposed in one embodiment of the present application is shown.

[0063] Reference Figure 4 and Figure 5 As shown, in some optional embodiments, each sound-transmitting display module (11) includes: a printed circuit board (111), a plurality of lamp beads (112), a driving circuit (113), at least one driving chip (114) and a plurality of sound-transmitting holes (115);

[0064] A plurality of lamp beads (112) are evenly arrayed and embedded on the front side of a printed circuit board (111); each lamp bead (112) is connected to a driving chip (114) via a driving circuit (113); at least one driving chip (114) is embedded on the rear side of the printed circuit board (111); and a plurality of sound-permeable holes (115) are provided at positions of the printed circuit board (111) where lamp beads (112) are not embedded, driving chips (114) are not embedded, driving circuits (113) are not provided, and where the mounting frame (12) is not blocked.

[0065] The main body of each sound-transmitting display module (11) is a PCB printed circuit board (111).

[0066] A plurality of lamp beads (112) are evenly arrayed on the front side of a PCB printed circuit board (111) to realize the display of digital movie images. The distance between adjacent lamp beads (112) is not less than 4 mm.

[0067] At least one driving chip (114) is embedded on the rear side of the PCB printed circuit board (111), and a driving circuit (113) is provided to connect the driving chip (114) and each lamp bead (112). The number of the driving chip (114) may be one, and each lamp bead (112) is connected to the driving chip (114) through the driving circuit (113); the number of the driving chips (114) may be multiple, and each lamp bead (112) is connected to one of the driving chips (114) through the driving circuit (113).

[0068] The sound-transmitting holes (115) are opened at a position of the PCB printed circuit board (111) where there are no lamp beads (112), no driving circuits (113), no driving chips (114), and no obstruction by the mounting frame (12). The opening rate of the plurality of sound-transmitting holes is not less than 6.43% and not more than 6.85%.

[0069] In the prior art, the driving chip (114) and the driving circuit (113) usually cause a certain degree of obstruction to the propagation path of the sound wave. Therefore, the driving chip (114) can be embedded on the left / right side of the PCB printed circuit board (111), thereby increasing the effective sound transmission area of ​​the sound-transmitting display module (11), improving the sound transmission effect, and reducing the attenuation of the sound after passing through the sound-transmitting display module (11).

[0070] Figure 6 A schematic structural diagram of a sound-permeable hole (115) proposed in one embodiment of the present application is shown.

[0071] Reference Figure 6 As shown, in some optional embodiments, each sound-transmitting hole (115) is composed of a plurality of circular sub-holes (1152) or at least one oblong sub-hole (1151), and the minimum circumscribed area of ​​each sound-transmitting hole is an oblong formed by smooth circumscribed semicircles at both ends of a rectangle, and the diameter of the semicircle of the minimum circumscribed area of ​​each sound-transmitting hole is not less than 1 mm.

[0072] Each sound-transmitting hole (115) may be composed of sub-holes of different shapes.

[0073] exist Figure 4 In the case shown, each sound-transmitting hole (115) is an oblong sub-hole (1151) of the same size, where the oblong here means a semicircle smoothly circumscribed at both ends of a rectangle. In this case, the minimum circumscribed area of ​​each sound-transmitting hole is the oblong sub-hole (1151) itself. The diameter of the circumscribed semicircle of the oblong is not less than 1 mm.

[0074] exist Figure 6In the case shown, a portion of the sound-transmitting holes (115) is composed of a plurality of circular sub-holes (1152), a portion of the sound-transmitting holes (115) is composed of a plurality of oblong sub-holes (1151), and a portion of the sound-transmitting holes (115) is composed of a single oblong sub-hole (1151). When a portion of the sound-transmitting holes (115) is composed of a plurality of circular sub-holes (1152) or a plurality of oblong sub-holes (1151), the minimum circumscribed area of ​​each sound-transmitting hole (115) is an oblong, and the diameter of the circumscribed semicircle of the oblong is not less than 1 mm.

[0075] In some optional embodiments, the mid-high frequency speaker unit (2) comprises: a mid-high frequency speaker module and a sound image adjustment device;

[0076] The mid-high frequency speaker module is arranged at the rear side of the sound-transmitting display unit (1), and the mid-high frequency speaker module is connected to the sound image adjustment device;

[0077] The sound image adjustment device is used to drive the mid-high frequency speaker module to achieve left-right and up-down rotation.

[0078] The sound image adjustment device is connected to the mid-high frequency speaker module, and can drive the mid-high frequency speaker module to rotate in the left-right direction and the up-down direction. For example: the mid-high frequency speaker module is facing the direction of the sound-transparent display unit (1) (i.e. Figure 1 The positive direction of the x-axis in the middle) is used as a reference, and the sound image adjustment device can adjust the mid-high frequency speaker module to rotate 0° to 30° in the left and right directions (that is, the total rotation angle in the left and right directions is 60°), and to rotate 0° to 30° in the up and down directions (that is, the total rotation angle in the up and down directions is 60°). Therefore, the sound image adjustment device can adjust the sound field coverage of the mid-high frequency speaker module in the audience area according to demand, effectively improve the sound field uniformity of each area in the audience area, so that the sound field uniformity of each area can be controlled within ±3dB.

[0079] In some optional embodiments, the mid-high frequency speaker module includes: a plurality of mid-high frequency speaker sub-modules arranged in a uniform array; each mid-high frequency speaker sub-module includes: a high frequency speaker module and a mid-frequency speaker module; the high frequency speaker module is arranged above the mid-frequency speaker module.

[0080] The mid-high frequency speaker module can be composed of a plurality of mid-high frequency speaker sub-modules arranged in a uniform array. Each mid-high frequency speaker sub-module consists of a high frequency speaker module and a corresponding mid-frequency speaker module. The high frequency speaker module is installed on the mid-frequency speaker module. For example, a mid-high frequency speaker module may include: 4 mid-high frequency speaker sub-modules, and the 4 mid-high frequency speaker sub-modules are arranged in a rectangular shape; each mid-high frequency speaker sub-module includes 1 mid-frequency speaker module and 1 high frequency speaker module (that is, the mid-high frequency speaker module includes 4 mid-frequency speaker modules and 4 high frequency speaker modules in total); each high frequency speaker module is installed on each mid-frequency speaker module respectively.

[0081] In the prior art, in order to obtain sufficient sound pressure in the audience area of ​​the theater, a large-sized mid-high frequency speaker unit (2) capable of withstanding high power is usually used. Therefore, the sound wave energy generated by the high-frequency driver of the mid-high frequency speaker unit (2) is relatively large, which can easily cause the excitation of surrounding components and cause damage to the components.

[0082] Therefore, in order to solve the above-mentioned problem, the embodiment of the present application proposes that a plurality of mid-high frequency speaker sub-modules are evenly arranged in an array on the rear side of the sound-transparent display unit (1).

[0083] The multiple mid-high frequency speaker submodules are evenly arranged in an array, and the same sound pressure effect as that of a high-power and large-size mid-high frequency speaker unit (2) in the prior art can be obtained while reducing the size of each mid-high frequency speaker submodule.

[0084] The uniform array structure of the mid-high frequency speaker submodules can correspond to the splicing structure of multiple sound-transmitting display modules (11). That is, the arrangement position of the mid-high frequency speaker submodules can avoid the installation frame (12) and the driver chip (114). In this way, the shielding of the sound wave propagation path by the installation frame (12) and the driver chip (114) can be effectively avoided, and the attenuation and harmonic distortion of the sound after passing through the sound-transmitting display unit (1) can be reduced.

[0085] In some optional embodiments, the diameter of the minimum circumscribed circle of each mid-high frequency speaker module is less than 8 inches.

[0086] In the prior art, the mid-frequency speaker module is usually larger than 7 inches; the high-frequency speaker module uses a high-frequency driver and a tweeter horn combination, and the size of the tweeter horn mouth is usually larger than 10 inches, and the size of the mid-high frequency speaker unit (2) is too large.

[0087] Therefore, the embodiment of the present application proposes that the diameter of the minimum circumscribed circle of each mid-high frequency speaker submodule is less than 8 inches, and then multiple small-sized mid-high frequency speaker submodules are evenly arrayed, thereby effectively avoiding obstruction from the driver chip (114) and the installation frame (12), and effectively improving the attenuation and harmonic distortion of the sound waves after passing through the sound-transparent display unit (1).

[0088] A sound-transmitting component (A) proposed in another embodiment of the present application includes: a sound-transmitting display unit (1), a mid-high frequency speaker unit (2) and a safety link protection unit (3).

[0089] The sound-transmitting display unit (1) comprises a plurality of sound-transmitting display modules (11), and the plurality of sound-transmitting display modules (11) are spliced ​​into the sound-transmitting display unit (1) via a mounting frame (12).

[0090] Each sound-transmitting display module (11) comprises: a printed circuit board (111), a plurality of lamp beads (112), a driving circuit (113), at least one driving chip (114) and a plurality of sound-transmitting holes (115); the plurality of lamp beads (112) are evenly arrayed and embedded on the front side of the printed circuit board (111), and the distance between adjacent lamp beads is not less than 4 mm; each lamp bead (112) is connected to a driving chip (114) via the driving circuit (113), and at least one driving chip (114) is embedded on the left / right side of the rear side of the printed circuit board (111); and the printed circuit board (111) is not embedded with a plurality of lamp beads (112). A plurality of sound-permeable holes (115) are provided at positions where lamp beads (112) are not embedded with a driving chip (114), where a driving circuit (113) is not provided, and where a mounting frame (12) is not blocked; each sound-permeable hole (115) is composed of a plurality of circular sub-holes (1152) or at least one oblong sub-hole (1151); the minimum circumscribed area of ​​each sound-permeable hole (115) is an oblong formed by two smoothly circumscribed semicircles at both ends of a rectangle; the diameter of the semicircle of the minimum circumscribed area of ​​each sound-permeable hole is not less than 1 mm; and the opening rate of the plurality of sound-permeable holes (115) is not less than 6.43% and not more than 6.85%.

[0091] The mid-high frequency loudspeaker unit (2) is arranged on the rear side of the sound-transmitting display unit (1).

[0092] The mid-high frequency speaker unit (2) comprises: a mid-high frequency speaker module and a sound image adjustment device. The mid-high frequency speaker module is arranged at the rear side of the sound-transmitting display unit (1), and the mid-high frequency speaker module is connected to the sound image adjustment device; the sound image adjustment device drives the mid-high frequency speaker module to achieve left-right rotation adjustment of 0° to 30° and up-down rotation adjustment of 0° to 30°.

[0093] The mid-high frequency speaker module includes: four mid-high frequency speaker submodules arranged in a uniform array; each mid-high frequency speaker submodule includes a mid-frequency speaker module and a high frequency speaker module arranged above the mid-frequency speaker module. The diameter of the minimum circumscribed circle of each mid-high frequency speaker submodule is less than 8 inches.

[0094] The safety link protection unit (3) comprises: a concave safety link protection shell (31) and a safety link protection link (32).

[0095] The safety link protection shell (31) includes a first lock buckle, and the corresponding position on the rear side of the mounting frame (12) includes a second lock buckle corresponding to the first lock buckle. The safety link protection link (32) is arranged on the first lock buckle and the second lock buckle.

[0096] When the first lock buckle and the second lock buckle are locked, the safety link protection shell (31) is buckled on the rear side of the sound-transmitting display unit (1), and the mid-high frequency speaker unit (2) is accommodated in the concave shape; when the safety link protection shell (31) is closed, the sound-transmitting display unit (1) and the mid-high frequency speaker unit (2) are packaged as a whole due to the safety link protection shell (31).

[0097] When the first lock buckle and the second lock buckle are released, the safety link protection shell (31) is separated from the rear side of the sound-transmitting display unit (1), and the safety link protection shell (31) is opened; the safety link protection link (32) transmits a protection signal to the LED projection system to stop the LED projection system from projecting.

[0098] The sound-transmitting assembly (A) proposed in the present application can make the effective opening rate of the sound-transmitting hole (115) reach 5%, has the advantages of low sound attenuation and low distortion, can adjust the uniformity of the sound field in each area of ​​the audience area, has the advantages of safe protection of the projection link, and is easy and quick to install and disassemble.

[0099] Figure 7 A schematic diagram of sound attenuation in various frequency bands of a sound-transmitting component (A) proposed in another embodiment of the present application is shown. Figure 8 A schematic diagram showing the harmonic distortion coefficients of various frequency bands of a sound-transmitting component (A) according to another embodiment of the present application is shown. Figures 7 and 8 The results shown are an example of structural dimension parameters of each unit of the sound-permeable component (A) selected within the scope specified in the present application, and the present application is not limited thereto.

[0100] In a second aspect, the present application proposes an LED movie screen.

[0101] The movie screen proposed in this embodiment includes: a box support, a plurality of sound-transparent components (A) proposed in the above-mentioned application, a plurality of non-sound-transparent components (B) and a low-frequency speaker unit.

[0102] The box support comprises a plurality of adjacent installation cavities, and a plurality of sound-transmitting components (A) and a plurality of non-sound-transmitting components (B) are arranged in the corresponding plurality of installation cavities and spliced ​​to form a screen;

[0103] The low-frequency speaker unit corresponds vertically to the mid-high frequency speaker unit (2) and is arranged below the screen.

[0104] A plurality of sound-transmitting components (A) and a plurality of non-sound-transmitting components (B) are arranged one by one in the installation cavity of the box support, so as to be spliced ​​into an integral screen. The non-sound-transmitting components (B) can reduce light pollution of the lamp beads (112).

[0105] The low-frequency speaker unit is placed below the screen, which greatly reduces the damage caused by low-frequency energy to components. In addition, the low-frequency speaker unit can also include multiple low-frequency speaker modules, and the number of the multiple low-frequency speaker modules is consistent with the number of the multiple mid-high frequency speaker modules. The multiple low-frequency speaker modules correspond to the vertical positions of the multiple mid-high frequency speaker units (2) and are arranged below the screen.

[0106] Figure 7 A schematic diagram of the structure of a screen proposed in one embodiment of the present application is shown.

[0107] Reference Figure 7 As shown, in some optional embodiments, there are three sound-transparent components (A), and the three sound-transparent components (A) are respectively arranged in the left channel mounting cavity, the center channel mounting cavity and the right channel mounting cavity of the box bracket; other mounting cavities of the box bracket are provided with non-sound-transparent components (B).

[0108] For general theaters, sound-transparent components (A) can be installed only in the left channel area, center channel area and right channel area to achieve the same sound reproduction effect as the traditional screen sound and image.

[0109] Figure 8 A schematic diagram of the structure of a screen proposed in another embodiment of the present application is shown.

[0110] Reference Figure 8 As shown, in some optional embodiments, there are five sound-transparent components (A), and the five sound-transparent components (A) are respectively arranged in the left channel mounting cavity, the left center channel mounting cavity, the center channel mounting cavity, the right center channel mounting cavity and the right channel mounting cavity of the box bracket; non-sound-transparent components (B) are arranged in other mounting cavities of the box bracket.

[0111] For larger theaters, in addition to the left channel area, center channel area and right channel area, sound-transparent components (A) can also be set in the left center channel area and the right center channel area to achieve a sound reproduction effect consistent with the traditional screen sound and image.

[0112] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A sound-transmitting component, characterized in that: The sound-transmitting assembly includes: a sound-transmitting display unit, a mid-high frequency speaker unit and a safety link protection unit; The mid-high frequency speaker unit is arranged at the rear side of the sound-transmitting display unit; The safety link protection unit comprises: a safety link protection shell and a safety link protection link; When the safety link protection shell is closed, the sound-transmitting display unit and the mid-high frequency speaker unit are encapsulated as one; When the safety link protection shell is opened, the safety link protection link is triggered to transmit a protection signal to the LED projection system to stop the LED projection system; wherein, the safety link protection link is connected to the LED projection system.

2. The sound-permeable assembly according to claim 1, characterized in that: The sound-transmitting display unit comprises: a plurality of sound-transmitting display modules and a mounting frame; A plurality of the sound-transmitting display modules are spliced ​​into the sound-transmitting display unit through the mounting frame.

3. The sound-permeable assembly according to claim 2, characterized in that: Each of the sound-transmitting display modules comprises: a printed circuit board, a plurality of lamp beads, a driving circuit, at least one driving chip and a plurality of sound-transmitting holes; A plurality of the lamp beads are uniformly arrayed and embedded in the front side of the printed circuit board, each of the lamp beads is connected to a driver chip through the driver circuit, at least one driver chip is embedded in the rear side of the printed circuit board, and a plurality of the sound-permeable holes are provided at positions on the printed circuit board where the lamp beads, the driver chips, the driver circuits, and the mounting frame are not blocked; The distance between adjacent lamp beads is not less than 4 mm, and the opening rate of the plurality of sound-transmitting holes is not less than 6.43% and not more than 6.85%.

4. The sound-permeable assembly according to claim 3, characterized in that: Each of the sound-transmitting holes is composed of a plurality of circular sub-holes or at least one oblong sub-hole, and the minimum circumscribed area of ​​each of the sound-transmitting holes is an oblong formed by smooth circumscribed semicircles at both ends of a rectangle, and the diameter of the semicircle of the minimum circumscribed area of ​​each of the sound-transmitting holes is not less than 1 mm.

5. The sound-permeable assembly according to claim 1, characterized in that: The mid-high frequency speaker unit comprises: a mid-high frequency speaker module and a sound image adjustment device; A mid-high frequency speaker module is arranged at the rear side of the sound-transmitting display unit, and the mid-high frequency speaker module is connected to the sound-image adjustment device; The sound and image adjustment device is used to drive the mid-high frequency speaker module to rotate in the left-right direction and the up-down direction.

6. The sound-permeable assembly according to claim 5, characterized in that: The mid-high frequency speaker module comprises: a plurality of mid-high frequency speaker sub-modules arranged in a uniform array; Each of the mid- and high-frequency speaker submodules includes: a high-frequency speaker module and a mid-frequency speaker module; the high-frequency speaker module is arranged above the mid-frequency speaker module.

7. The sound-permeable assembly according to claim 6, characterized in that: The diameter of the minimum circumscribed circle of each of the mid-high frequency speaker submodules is less than 8 inches.

8. An LED movie screen, characterized in that: The LED movie screen comprises: a box support, a plurality of sound-transmitting components as described in claims 1 to 7, a plurality of non-sound-transmitting components and a low-frequency speaker unit; The box support comprises a plurality of adjacent installation cavities, and a plurality of the sound-transmitting components and a plurality of the non-sound-transmitting components are arranged in the corresponding plurality of the installation cavities and spliced ​​to form a screen; The low-frequency speaker unit corresponds vertically to the mid- and high-frequency speaker units and is arranged below the screen.

9. The LED movie screen according to claim 8, characterized in that: There are three sound-transmitting components, which are respectively arranged in the left channel installation cavity, the center channel installation cavity and the right channel installation cavity of the box bracket; the non-sound-transmitting components are arranged in the other installation cavities of the box bracket.

10. The LED movie screen according to claim 8, characterized in that: There are five sound-transmitting components, which are respectively arranged in the left channel installation cavity, the left center channel installation cavity, the center channel installation cavity, the right center channel installation cavity and the right channel installation cavity of the box bracket; the non-sound-transmitting components are arranged in the other installation cavities of the box bracket.

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