Sound-transmitting LED box, sound-transmitting LED screen, and cinema hall

Abstract

A sound-transmitting LED box, a sound-transmitting LED screen (91), and a cinema hall. The sound-transmitting LED box comprises a box frame (1), and a plurality of LED modules (2) arranged in sequence are fixed in the box frame (1); each LED module (2) comprises a PCB (21) provided with a power line and a data line, the PCB (21) has a first region (A) and a second region (B), and the front surface of the first region (A) and the front surface of the second region (B) are each provided with a plurality of LED lamp beads (22); a plurality of sound transmission holes (23) passing through the PCB (21) are further formed in the first region (A), each LED lamp bead (22) comprises an LED light emitting chip (221) and a driving chip (222) which are integrally packaged, and the driving chip (222) is electrically connected to the LED light emitting chip (221); a connector (24) is provided on the back surface of the second region (B) and is electrically connected to the LED lamp beads (22) by means of the power line and the data line. The LED light emitting chips (221) and the driving chips (222) are integrally packaged in the LED lamp beads (22), so that the requirements of wire connection inside the PCB (21) in the LED module (2) are greatly reduced, and more area can be freed up on the PCB (21) to make sound transmission holes (23), so that the structure of the entire screen (91) achieves an ideal sound transmission effect.

Description

Sound-transparent LED cabinets, sound-transparent LED screens and theaters

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on March 13, 2024, with application number 2024204997600 and application name “Sound-transparent LED box, sound-transparent LED screen and theater”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the field of LED technology, and in particular relates to a sound-transmitting LED box, a sound-transmitting LED screen, and a theater. Background Art

[0003] Movies can present visual effects on the screen through optical technology. As a powerful form of entertainment and culture, movies have a wide audience and unlimited commercial prospects.

[0004] Movie screens include projection-type metal screens and self-luminous display screens, such as LED and OLED displays. Projection-type metal screens feature acoustic perforations. During a movie, central sound, emitted from high-power speakers installed behind the screen, travels through the perforations to the audience. This allows the audience to perceive the characters' voices as emanating from the center of the screen, aligning with the character's image, for a truly authentic viewing experience.

[0005] However, LED screens are different. They are typically composed of LED cabinets, each containing LED modules, forming a soundproof wall. Therefore, if speakers are installed behind the screen in a cinema, the sound won't reach the audience. This problem is particularly pronounced in theaters with large LED screens, where sound can't emanate from the center of the screen, and viewers lose the authentic cinematic experience of hearing characters speaking from within the image.

[0006] In theory, it's possible to create acoustic holes in LED displays, similar to those used in metal screens. However, in practice, the acoustic transparency is less than ideal. The reason is this: Traditional LED displays utilize SMD (Solid Metal Device) LEDs mounted on the viewer-facing side of a printed circuit board (PCB), while the driver ICs (integrated circuits) are located on the back. Because the pins of the red, green, and blue light-emitting diodes in each LED need to be connected to the output pins of the driver chip on the back of the PCB, the PCB often requires a four-layer structure to accommodate all wiring requirements. Creating acoustic holes on this complex four-layer PCB, allowing sound from speakers behind the LED display to pass through to the front of the screen, is extremely difficult. The holes need to avoid the wiring on each layer, resulting in a very small diameter, typically limited to 10% or less, making the acoustic transparency completely unsuitable for movie viewing.

[0007] Therefore, the sound transmission effect of LED display screens needs to be improved. Technical issues

[0008] The technical problem to be solved by this application is how to improve the sound transmission effect of LED display screens. Technical Solutions

[0009] In order to solve the above technical problems, in the first aspect, the present application provides a sound-transmitting LED box, including a box frame, in which several LED modules arranged in sequence are fixed; each of the LED modules includes a PCB board, and the PCB board is provided with a power line and a data line. The PCB board has a first area and a second area, and the front of the first area and the front of the second area are both provided with multiple LED lamp beads; the first area is also provided with several sound-transmitting holes passing through the PCB board, and each of the LED lamp beads includes an integrated packaged LED light-emitting chip and a driver chip, and the driver chip is electrically connected to the LED light-emitting chip; a connector is provided on the back of the second area, and the connector is electrically connected to each LED lamp bead through the power line and the data line; a HUB board is also fixed on the box frame, which is used to connect the connectors of each LED module and distribute the video drive signal to each of the connectors.

[0010] Furthermore, there is no sound-permeable hole in the second area.

[0011] Furthermore, the first area of ​​each LED module is fixed to the first frame of the box frame, and the second area is fixed to the second frame of the box frame, wherein the first frame is opposite to the second frame.

[0012] Furthermore, in the first area and the second area, the LED lamp beads are arranged in a matrix, and a row of the sound-transmitting holes is provided between two adjacent rows of LED lamp beads.

[0013] Furthermore, the position occupied by each LED lamp bead on the PCB board is a rectangle, and each side of the rectangle has a sound-transmitting hole in the vertical direction, forming a diagonal arrangement of the sound-transmitting hole and the LED lamp bead; or, each corner of the rectangle has a sound-transmitting hole on the outside.

[0014] Furthermore, the sound-transmitting holes are arranged in a matrix and are interlaced with the matrix of the LED lamp beads, forming a structure in which the sound-transmitting holes and the LED lamp beads are staggered in both the horizontal direction and the horizontal direction.

[0015] Furthermore, a black sound-transmitting cloth is fixed on the back side of the sound-transmitting LED box at a position facing the first area.

[0016] Furthermore, the areas of the plurality of sound-transmitting holes account for more than 25% of the area of ​​the first region; the number of layers of the PCB board is less than four; and the shape of the sound-transmitting holes is one or more of circular and polygonal.

[0017] In the second aspect, the present application also provides a sound-transmitting LED screen, comprising a plurality of sound-transmitting LED boxes as described in the first aspect, wherein the outer side surface of each sound-transmitting LED box has a detachable connection portion, and adjacent sound-transmitting LED boxes are spliced ​​and fixed through the detachable connection portion.

[0018] In a third aspect, the present application also provides a cinema, comprising: a sound-transmitting LED screen as described in the second aspect, which receives video drive signals through the HUB boards of each sound-transmitting LED box and distributes them to connectors of each LED module; an auditorium facing the sound-transmitting LED screen; and at least one speaker arranged on the back of the sound-transmitting LED screen. Beneficial effects

[0019] In the sound-transmitting LED box / screen provided by the present application, the LED lamp beads integrate the LED light-emitting chip and the driver chip into an integrated package, and simplify the image signal to a data line plus a positive and negative power line, which can drive the LED pixels belonging to the same link, greatly reducing the connection requirements in the LED module PCB board and extremely simplifying the circuit structure. This can avoid the use of multi-layer PCB boards, and more area on the PCB board can be freed up for sound-transmitting holes, which means that the same size LED module can add more sound-transmitting holes, so that the entire screen structure can achieve an ideal sound-transmitting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 1A and 1B are front and back structural diagrams of a sound-transmitting LED box provided in a first embodiment of the present application, respectively;

[0021] 2A and 2B are front and back structural diagrams of the LED module provided in the first embodiment of the present application, respectively;

[0022] FIG3 is a cross-sectional view obtained by cutting the first region in FIG2A along a 45-degree angle;

[0023] FIG4 is a structural diagram of an LED lamp bead provided in the first embodiment of the present application;

[0024] FIG5 is a circuit connection diagram of an LED lamp bead provided in the first embodiment of the present application;

[0025] 6A, 6B, and 6C are schematic diagrams showing arrangements of three types of LED lamp beads and sound-transmitting holes according to the first embodiment of the present application;

[0026] FIG7 is a schematic diagram of a black sound-transmitting cloth fixed to the back of a sound-transmitting LED box provided by the first embodiment of the present application;

[0027] 8A, 8B, and 8C are schematic diagrams showing the splicing method of the boxes in the sound-transparent LED screen provided in the second embodiment of the present application;

[0028] FIG9 is a structural diagram of a theater provided in the third embodiment of the present application. Best Mode for Carrying Out the Invention

[0029] Type here the best mode description paragraph of the invention. Modes for Carrying Out the Invention

[0030] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0031] Figures 1A and 1B respectively show the front structure and back structure of the sound-transmitting LED box provided in the first embodiment of the present application. Referring to Figures 1A and 1B, the sound-transmitting LED box includes a box frame 1, in which a plurality of LED modules 2 arranged in sequence are fixed. After splicing, the LED modules 2 can fill the entire area of ​​the box frame 1.

[0032] FIG2A and FIG2B respectively show the front structure and back structure of the LED module 2 provided in the first embodiment of the present application. Referring to FIG2A and FIG2B , each LED module 2 includes a PCB board 21 having a first area A and a second area B. A plurality of LED lamp beads 22 are provided on the front of the first area A and the front of the second area B. In addition, a plurality of sound-transmitting holes 23 are provided in the first area A and penetrate the PCB board 21. Cutting the first area A in FIG2A along a 45-degree angle can obtain the cross-sectional view shown in FIG3 . From this angle, it can be seen that the LED lamp beads 22 and the sound-transmitting holes 22 are arranged at intervals. It should be understood that this is only an exemplary structure and can be flexibly transformed into other arrangements. For example, one sound-transmitting hole 23 can be provided for every two LED lamp beads 22.

[0033] The wiring on PCB board 21 in Figure 3 primarily consists of two types: power lines and data lines. In terms of the number of lines, there are two power lines, positive and negative, so these three lines are sufficient. These lines can be placed on the surface or inner layers of PCB board 21 as needed. Correspondingly, as shown in Figure 4 , each LED lamp bead 22 includes an integrated packaged LED light-emitting chip 221 and a driver chip 222. The driver chip 222 is electrically connected to the LED light-emitting chip 221. The entire package is connected to power leads, ground leads, and data leads. The specific circuit structure is shown in Figure 5 .

[0034] Referring to Figure 2B again, a connector 24 is provided on the back of the second area B. The connector 24 is electrically connected to each LED lamp bead 22 through the power line and data line arranged in the PCB board 21 to form a cascade circuit. The specific cascade method can be a serial connection, and the data lines of each LED lamp bead 22 are connected sequentially, or it can be a parallel connection, and the data lines of each LED lamp bead 22 are connected together on the data line.

[0035] A HUB board 3 is also fixed in the box frame 1, which is used to connect the connectors 24 of each LED module 2, distribute the video drive signal to each connector 24, and the connector 24 then sends the video signal to each driver chip 222. Each driver chip 222 drives the LED light-emitting chip 221 to emit light according to the corresponding grayscale in the video signal.

[0036] It can be seen that in the sound-transmitting LED box provided by the first embodiment, the LED lamp bead 22 integrates the LED light-emitting chip 221 and the driver chip 222 into an integrated package, and simplifies the image signal to a data line plus a positive and negative power line, which can drive the LED pixels belonging to the same link, greatly reducing the connection requirements in the PCB board 21 and extremely simplifying the circuit structure. In this way, the use of multi-layer PCB boards can be avoided, and PCB boards with less than four layers can be selected. More area can also be freed up on the PCB board 21 to make sound-transmitting holes, which means that the same size of LED modules can add more sound-transmitting holes, so that the entire screen structure can achieve an ideal sound-transmitting effect.

[0037] In order to facilitate structural installation and have unlimited splicing capabilities, we set the connector 24 and related circuits of each LED module 2 behind the PCB board 21. Specifically, in the second area B, the connector 24 is set on the back of the PCB board 21. Due to the presence of the connector 24, part of the area of ​​the LED module 2 will be occupied. The second area B does not need to have a sound-transmitting hole, as long as the sound-transmitting hole 23 in the first area A can meet the overall sound-transmitting effect.

[0038] In addition, as shown in Figures 1A and 1B, the box frame 1 has four frames, namely, the upper, lower, left and right frames. The first area A of each LED module 2 is fixed to the first frame of the box frame 1, and the second area B is fixed to the second frame of the box frame 1, wherein the first frame and the second frame are relative but not adjacent (the first frame is shown as the right frame and the second frame is shown as the left frame as an example in the figure). In this way, the first area A with the sound-transmitting hole 23 is installed close to the same frame of the box frame 1, which can maximize the overall sound-transmitting area in the box frame 1 and fully realize the sound-transmitting effect.

[0039] Furthermore, as shown in FIG. 2A and FIG. 2B , in the first area A, the LED lamp beads 22 are arranged in a matrix, and a row of sound-permeable holes 23 is provided between two adjacent rows of LED lamp beads 22 .

[0040] On this basis, as shown in Figure 6A , each LED lamp bead 22 occupies a rectangular position on the PCB board 21, with a sound-transmitting hole 23 perpendicular to each side of the rectangle, forming a diagonal arrangement of the sound-transmitting holes 23 and the LED lamp bead 22. As a variation, the arrangement shown in Figure 6A can be rotated 45 degrees to obtain the arrangement shown in Figure 6B , in which a sound-transmitting hole 23 is provided on the outer side of each corner of the rectangle. The arrangement in Figure 6A maximizes the area of ​​the sound-transmitting holes 23.

[0041] Figure 6C shows another arrangement of the LED lamp beads 22 and the sound-transmitting holes 23. The LED lamp beads 22 and the sound-transmitting holes 23 are arranged in a matrix, and the matrix of the sound-transmitting holes 23 and the matrix of the LED lamp beads 22 are interspersed, forming a structure in which the sound-transmitting holes 23 and the LED lamp beads 22 are staggered in both the horizontal direction and the horizontal direction.

[0042] As a solution, in order to ensure the sound transmission effect, the total area of ​​the sound holes 23 in the first area A accounts for more than 25% of the area of ​​the first area A, and the shape of the sound holes 23 is not limited, such as one or more of a circle and a polygon, and the polygon can be a triangle, a rectangle or a multi-sided shape.

[0043] Considering the existence of the sound-transmitting hole 23 in the first area A, the audience may be able to see the situation on the back of the screen through the sound-transmitting hole 23 from the front of the screen. A black sound-transmitting cloth 25 can be fixed on the back of the sound-transmitting LED box facing the first area A, as shown in Figure 7.

[0044] The second embodiment of the present application provides a sound-transmitting LED screen, comprising: a plurality of sound-transmitting LED boxes as described in the first embodiment above, the outer side surface of each of the sound-transmitting LED boxes having a detachable connection portion, and adjacent sound-transmitting LED boxes are spliced ​​and fixed through the detachable connection portion, and the detachable connection portion can be a snap-fit ​​connection form, or an alignment hole is set on the side wall of the box, and the alignment holes of the two boxes to be spliced ​​are connected and fixed by screws, wherein the above-mentioned "outer side surface" can be one or more of the upper side surface, lower side surface, left side surface, and right side surface of the box, so as to facilitate splicing of the box at the top, bottom, left or right.

[0045] 8A and 8B show two cabinet splicing methods with vertical HUB boards, and FIG. 8C shows a cabinet splicing method with horizontal HUB boards. Of course, other splicing methods can be flexibly changed according to on-site wiring requirements during specific implementation.

[0046] The third embodiment of the present application provides a theater, as shown in FIG9 , comprising: a sound-transmitting LED screen 91 , an auditorium 92 , and a speaker 93 .

[0047] The structure of the sound-transmitting LED screen 91 is as described in the second embodiment above. The video driving signal is received through the HUB board 3 of each sound-transmitting LED box and distributed to the connector 24 of each LED module 2.

[0048] The auditorium 92 faces the sound-transmitting LED screen 91 and can be a one-layer or multi-layer stepped structure.

[0049] The speaker 93 is set on the back of the sound-transmitting LED screen 91, and includes at least one speaker located in the middle of the back of the sound-transmitting LED screen 91, and two more speakers can also be set on both sides.

[0050] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application. Industrial Applicability

[0051] Type your industrial applicability description paragraph here. Sequence Listing Free Content

[0052] Type your sequence listing free description paragraph here.

Claims

1. A sound-transmitting LED box, characterized in that: The device comprises a box frame, wherein a plurality of LED modules arranged in sequence are fixed in the box frame; each of the LED modules comprises a PCB board, wherein a power line and a data line are arranged on the PCB board, and the PCB board has a first area and a second area, wherein a plurality of LED lamp beads are arranged on the front of the first area and the front of the second area; The first area is further provided with a plurality of sound-permeable holes penetrating the PCB board. Each of the LED lamp beads includes an integrated LED light-emitting chip and a driver chip, and the driver chip is electrically connected to the LED light-emitting chip. A connector is provided on the back of the second area, and the connector is electrically connected to each LED lamp bead through the power line and the data line; The box frame is also fixed with a HUB board for connecting the connectors of each LED module and distributing the video drive signal to each of the connectors.

2. The sound-transmitting LED box according to claim 1, wherein: There is no sound-permeable hole in the second area.

3. The sound-transmitting LED box according to claim 1, wherein: The first area of ​​each LED module is fixed to the first frame of the box frame, and the second area is fixed to the second frame of the box frame, wherein the first frame is opposite to the second frame.

4. The sound-transmitting LED box according to claim 1, wherein: In the first area and the second area, the LED lamp beads are arranged in a matrix, and a row of the sound-permeable holes is provided between two adjacent rows of LED lamp beads.

5. The sound-transmitting LED box according to claim 4, characterized in that: The position occupied by each LED lamp bead on the PCB board is rectangular; There is a sound-transmitting hole in the vertical direction of each side of the rectangle, forming a diagonal arrangement of the sound-transmitting holes and the LED lamp beads; or there is a sound-transmitting hole on the outside of each corner of the rectangle.

6. The sound-transmitting LED box according to claim 4, wherein: The sound-transmitting holes are arranged in a matrix and are interlaced with the matrix of the LED lamp beads, forming a structure in which the sound-transmitting holes and the LED lamp beads are staggered in both the horizontal direction and the horizontal direction.

7. The sound-transmitting LED box according to claim 1, wherein: A black sound-transmitting cloth is fixed on the back side of the sound-transmitting LED box facing the first area.

8. The sound-transmitting LED box according to claim 1, wherein: The areas of the plurality of sound-transmitting holes account for more than 25% of the area of ​​the first region; The number of layers of the PCB board is less than four; The shape of the sound-transmitting hole is one or more of a circle and a polygon.

9. A sound-transmitting LED screen, characterized in that: include: A plurality of sound-transmitting LED boxes according to any one of claims 1 to 8, wherein the outer side surface of each sound-transmitting LED box has a detachable connection portion, and adjacent sound-transmitting LED boxes are spliced ​​and fixed via the detachable connection portion.

10. A cinema hall, characterized in that: include: The sound-transmitting LED screen according to claim 9 receives the video drive signal through the HUB board of each sound-transmitting LED box and distributes it to the connectors of each LED module; an auditorium facing the sound-transparent LED screen; At least one speaker is arranged on the back of the sound-transmitting LED screen.

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