Sound transmission LED box body with anti-piracy function, screen and movie hall

Abstract

The utility model is suitable for the technical field of LEDs, and provides a sound transmission LED box body with an anti-piracy function, a screen and a movie hall. The sound transmission LED box body comprises a box frame, and a plurality of LED modules which are arranged in sequence are fixed in the box frame. Each LED module comprises a first PCB and a second PCB which are perpendicular to each other, a driving chip is arranged on the back face of each first PCB, LED lamp beads are arranged on the front faces of the second PCBs, sound transmission areas without wiring are arranged between the second PCBs, sound emitted by a loudspeaker box placed on the back of the screen can reach an auditorium through the sound transmission areas, and the sound transmission effect is good. The size specification of the sound transmission area can be designed according to the expected sound effect, so that the whole screen structure achieves the ideal sound transmission effect. Moreover, the HUB board on the back of the box body is covered with the rear cover with the lock, whether the HUB board receives the video signals or not is determined by detecting the state of the locking piece through the sensor, the safety of video resources is improved, and the video resources are prevented from being leaked from the LED box body.

Description

Technical Field

[0001] The utility model belongs to the technical field of LEDs, and in particular relates to a sound-transmitting LED box, a screen and a cinema with an anti-piracy function. Background Art

[0002] 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.

[0003] Movie screens include projection-type metal screens and self-luminous display screens. Self-luminous display screens include LED display screens, OLED display screens, etc. Among them, projection-type metal screens have sound-transmitting holes. When the movie is playing, the central sound is emitted from the high-power speakers installed behind the screen and transmitted to the audience seats through the sound-transmitting holes of the screen. In this way, the audience can feel that the voices of the characters in the movie are coming from the middle of the screen, which is consistent with the position of the characters' images, achieving the most realistic viewing experience.

[0004] However, it is different for LED screens, which are generally made up of LED cabinets with LED modules inside, forming a soundproof wall. Therefore, if used in a cinema, the sound from the speakers installed behind the LED screen cannot reach the audience seats. This problem is particularly prominent in cinemas with large-sized LED screens, where the sound cannot be emitted from the middle of the screen, and the audience will lose the real movie feeling of hearing the characters speaking from the middle of the image.

[0005] In theory, it is also possible to make sound-transmitting holes on the LED display screen similar to those on the metal screen, but in practice, it is found that the sound-transmitting effect is not ideal. The reasons are as follows: the traditional LED display screen structure is that the LED lamp beads of SMD (strip packaging) are on the side of the PCB facing the audience, and the IC (driver chip integrated circuit) of the driving circuit is on the back of the PCB. Because the pins of the red, green, and blue light-emitting chips in each LED lamp bead need to be connected to the output pins of the driver chip on the back of the PCB, the PCB often needs to use a 4-layer board structure to meet all the wiring requirements. If you want to make sound-transmitting holes on this 4-layer PCB with complex circuits to allow the sound from the speakers behind the LED display screen to penetrate to the front of the screen, it is very difficult. The sound-transmitting holes need to avoid the wiring on each layer of the board, resulting in the fact that the diameter of the sound-transmitting holes can only be very small. Generally, the opening ratio can only be 10% or less, and the sound-transmitting effect does not meet the requirements of watching movies at all.

[0006] In addition, the problem of piracy of film copyrights is becoming increasingly diverse. How to reduce piracy, maintain the normal order of the film market, and promote the healthy development of the film industry are issues that film practitioners need to continue to pay attention to and improve. Utility Model Content

[0007] The technical problem to be solved by the utility model is how to improve the sound transmission effect of the LED display screen and how to prevent piracy during movie screening.

[0008] To solve the above technical problems, in a first aspect, the utility model provides a sound-transmitting LED box with an anti-piracy function, comprising a box frame, in which a plurality of LED modules arranged in sequence are fixed; each of the LED modules comprises a PCB board, the PCB board comprises at least two first PCB boards arranged in parallel along a first direction, and two adjacent first PCB boards are connected by a plurality of second PCB boards arranged in parallel along a second direction, wherein the first direction is perpendicular to the second direction; a driver chip is arranged on the back of the first PCB board, and an LED lamp bead is arranged on the front of the second PCB board, and the driver chip and the LED lamp bead are electrically connected through wiring arranged on the second PCB board; between each of the second PCB boards is a sound-transmitting area without wiring; a portion of the back of the LED module is provided with a driver chip, and a portion of the back of the LED module is provided with a LED lamp bead; A connector is arranged on the side, and the connector is electrically connected to the driving chip; the connectors of each LED module are located on the same side of the box; a HUB board is also fixed at the back of the box facing the connector, and the HUB board is used to connect the connectors of each LED module and distribute the video driving signal to each connector; the sound-transmitting LED box also includes a back cover movably connected to the box frame, and the back cover only covers the position where the HUB board is located; the back cover has at least one first locking piece, and the box frame is equipped with a second locking piece that matches the first locking piece; a sensor connected to the HUB board is arranged at the first locking piece or the second locking piece, and the sensor is used to detect the switch state of the first locking piece or the second locking piece, and send the detection signal to the HUB board for forwarding.

[0009] Furthermore, an LED lamp bead is provided at the front position of the LED module directly facing the connector, and the sound-transmitting area is not provided.

[0010] Furthermore, the sound-transmitting area is a sound-transmitting groove, and the length direction of the sound-transmitting groove is along the second direction.

[0011] Furthermore, along the sound transmission direction of the sound transmission groove, the notch of the sound transmission groove changes gradually, and the narrow opening is located at the back side of the box body, and the wide opening is located at the front side of the box body.

[0012] Furthermore, the sound-transmitting area includes a third PCB board with a non-wiring design, and the third PCB board is provided with a plurality of sound-transmitting holes penetrating the third PCB board.

[0013] Furthermore, along the sound transmission direction of the sound transmission hole, the sound transmission hole is trumpet-shaped, with a narrow opening located at the back side of the box body and a wide opening located at the front side of the box body.

[0014] Furthermore, a black sound-transmitting cloth is fixed on the back side of the sound-transmitting LED box at a position facing the sound-transmitting area.

[0015] In the second aspect, the utility model 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 of the sound-transmitting LED boxes has a detachable connecting portion, and adjacent sound-transmitting LED boxes are spliced ​​and fixed via the detachable connecting portion.

[0016] In the third aspect, the utility model also provides a cinema, comprising: the sound-transmitting LED screen as described in the second aspect, which receives video signals through the HUB board of each sound-transmitting LED box and distributes them to the connectors of each LED module; a video player, which is used to receive the detection signal of the sensor forwarded by the HUB board, stop outputting the video signal to the HUB board when the detection signal indicates that the first locking piece or the second locking piece is in an unlocked state, and normally output the video signal to the HUB board when the detection signal indicates that the first locking piece or the second locking piece is in a locked state; an auditorium facing the sound-transmitting LED screen; and at least one speaker arranged on the back of the sound-transmitting LED screen.

[0017] Furthermore, the sound-transmitting LED screen is in a curved shape and is bent in a direction away from the auditorium; and a sound-absorbing layer is installed on the wall of the theater on the back side of the sound-transmitting LED screen.

[0018] The sound-transmitting LED box / screen provided by the utility model includes a first PCB plate and a second PCB plate arranged perpendicular to each other, wherein the second PCB plate is provided with LED lamp beads, and between each second PCB plate is a sound-transmitting area without wiring, and the sound emitted by the speaker placed behind the screen can reach the audience seats through the sound-transmitting area, and the size of the sound-transmitting area can be designed according to the desired sound effect, so that the entire screen structure can achieve an ideal sound-transmitting effect. In addition, a rear cover with a lock is provided on the HUB board on the back of the box, and the state of the locking piece is detected by a sensor to determine whether the HUB board receives the video signal, thereby increasing the security of the video resources and preventing the video resources from leaking from the LED box. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1A , Figure 1B They are respectively the front structure and the back structure diagram of the sound-transmitting LED box provided by the first embodiment of the utility model;

[0020] Figure 2A , Figure 2B They are respectively the front structure and the back structure diagram of the LED module provided by the first embodiment of the utility model;

[0021] Figure 3 This is a front structural diagram of another LED module provided by the first embodiment of the utility model;

[0022] Figure 4 Yes Figure 3 A cross-sectional view obtained by cutting the first region in the image along a 45-degree angle;

[0023] Figure 5 It is a schematic diagram of a black sound-transmitting cloth fixed on the back of a sound-transmitting LED box provided by the first embodiment of the utility model;

[0024] Fig. 6A , Figure 6B , Figure 6C This is a schematic diagram of the splicing method of each box in the sound-transmitting LED screen provided in the second embodiment of the utility model;

[0025] Figure 7 It is a structural diagram of a theater provided in the third embodiment of the utility model. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] Figure 1A and Figure 1B The front and back structures of the sound-transmitting LED box with anti-piracy function provided by the first embodiment of the utility model are shown respectively. Figure 1A , Figure 1B The sound-transmitting LED box includes a box frame 1, in which a plurality of LED modules 2 are fixed and arranged in sequence. After being spliced, the LED modules 2 can fill the entire area of ​​the box frame 1. The box frame 1 is not visible on the front of the LED box because it is blocked by the LED modules 2, and can only be seen on the back of the LED box. In this application, the "front" refers to the side where the LED lamp beads in the LED module 2 are located, and the other side is the back.

[0028] Figure 2A , Figure 2B The front structure and the back structure of the LED module 2 provided in the first embodiment of the present invention are shown respectively. Figure 2A , Figure 2BEach LED module 2 includes a PCB board, and the PCB board includes a first PCB board 21 and a second PCB board 22, wherein the first PCB boards 21 are at least two and are arranged in parallel along the first direction, and the number of the second PCB boards 22 is more, and the specific number is related to the size of the display area of ​​the LED module 2, and the second PCB boards 22 are arranged in parallel along the second direction, such as Figure 2A As shown in FIG. 1 , the first direction and the second direction are perpendicular to each other. Figure 2A The first direction is the vertical direction and the second direction is the horizontal direction, and the first direction can also be switched to the horizontal direction and the second direction to the vertical direction.

[0029] Two adjacent first PCB plates 21 are connected through a plurality of second PCB plates 22, a driver chip 211 is provided on the back of the first PCB plate 21, an LED lamp bead 221 is provided on the front of the second PCB plate 22, and the driver chip 211 and the LED lamp bead 221 are electrically connected through a wiring arranged on the second PCB plate 22. The wiring may include a power line, a data line, etc., and may be arranged on the upper surface layer, the middle layer, or the bottom surface layer of the second PCB plate 22.

[0030] The space 22 between each second PCB board is a sound-transmitting area 23. In this embodiment, the wiring of the entire PCB board is arranged in the first PCB board 21 and the second PCB board 22, and no wiring is arranged in the sound-transmitting area 23. In this way, when drilling sound holes in the sound-transmitting area 23, there is no need to avoid the wiring, and the entire sound-transmitting area 23 can even be connected to form a large sound-transmitting opening. In addition, the size and specifications of the sound-transmitting area 23 and the area ratio of the entire PCB board can be designed according to the required sound-transmitting effect.

[0031] like Figure 2B As shown, a connector 24 is disposed on one side of the back of the LED module 2, and the connector 24 is electrically connected to the driver chip 211. Figure 1B As shown, the connectors 24 of each LED module 2 are located on the same side of the box, and a HUB board 3 is fixed to the back of the box opposite the connector 24. The HUB board 3 is used to connect the connectors of each LED module and distribute the video drive signal to each connector 24. The connector 24 then sends the video signal to each driver chip 211. Each driver chip 211 drives the LED lamp bead 221 to emit light according to the corresponding gray scale in the video signal.

[0032] See also Figure 1B The sound-transmitting LED box also includes a back cover 4 movably connected to the box frame 1. It can be understood that if the back cover 4 covers the entire back of the box frame 1, the sound-transmitting area 23 will not be able to transmit sound normally. Therefore, in this embodiment, the back cover 4 only covers the position where the HUB board 3 is located.

[0033] One side of the rear cover 4 is movably connected to the box frame 1, and the other side has at least one first locking member, and the box frame 1 is equipped with a second locking member that matches the first locking member, for example, Figure 1B The upper side of the rear cover 4 is rotatably connected to the upper side frame of the box frame 1, and the first locking member is installed at the lower side of the rear cover 4, and then the second locking member is installed at the lower side frame of the box frame 1. As an example, one lock body and the other lock slot can be selected for both.

[0034] The switch state between the first locking member and the second locking member includes a locked state and an unlocked state, wherein in the locked state, the HUB board 3 is locked by the back cover 4. The first locking member and the second locking member can be physical locks, which can be opened by a key, a password, a fingerprint, etc.

[0035] A sensor connected to the HUB board 3 is provided at the first locking member or the second locking member, and the sensor is used to detect the switch state of the first locking member or the second locking member, and send the detection signal to the HUB board 3 for forwarding.

[0036] The anti-piracy principle of the rear cover 4 is as follows: the LED box receives the video signal from the external video player, and the sensor is connected to the video player through a line. When the sensor detects that the first locking member and the second locking member are in a locked state, the sensor generates a pass signal and forwards it to the video player through the HUB board 3. When the video player receives the pass signal, it transmits the video signal to the LED box through the HUB board 3. When the sensor detects that the first locking member and the second locking member are in an unlocked state, the sensor generates a disconnect signal and forwards it to the video player through the HUB board 3. When the video player receives the disconnect signal, it stops transmitting the video signal to the LED box through the HUB board 3.

[0037] Considering that LED boxes often form an array structure when working, and multiple LED boxes work at the same time, the present application is specially designed so that when the sensor installed on any LED box generates a circuit break signal, the video player will stop transmitting the video signal, and all LED boxes cannot receive the video signal. In this way, it can be ensured that the video player can transmit the video signal to the LED box only when the rear covers 4 of all LED boxes are in a locked state at the same time, thereby increasing the security of the video resources and preventing the video resources from leaking from the LED boxes.

[0038] In order to facilitate installation and unlimited splicing, we place the connector 24 and related circuits of each LED module 2 behind the PCB board. Figure 2A and Figure 2B, the front position of the LED module 2 facing the connector 24 is provided with an LED lamp bead 221, and the front position facing the connector 24 is not provided with the sound-transmitting area 23. Although the connector 24 occupies part of the area of ​​the LED module 2, and the front position facing the connector is not sound-transmitting, the sound-transmitting effect can be met by designing the area of ​​the HUB board 3 and the back cover 4 to the minimum, and maximizing the area of ​​the sound-transmitting area between the second PCB board 22 while meeting the display resolution.

[0039] exist Figure 2A and Figure 2B In the embodiment, the sound-transmitting area 23 is a long strip of sound-transmitting groove structure, and the direction of the sound-transmitting groove is along the second direction. Furthermore, in order to better transmit the sound from the back to the front, along the sound-transmitting direction of the sound-transmitting groove, the notch of the sound-transmitting groove changes incrementally, and the narrow opening is located at the back of the box body, and the wide opening is located at the front of the box body. This shape is similar to a flat and long trumpet, which can play a good auxiliary role in the process of transmitting the sound from the back to the front.

[0040] Figure 3 Another design method of punching holes on a PCB board in the sound-transmitting area 23 is shown. Specifically, the sound-transmitting area 23 includes a third PCB board with a no-wiring design. The third PCB board is provided with a plurality of sound-transmitting holes 231 that penetrate the third PCB board. The shape of the sound-transmitting holes 231 is not limited, such as one or more of a circle and a polygon. The polygon can be a triangle, a rectangle or a multi-sided shape.

[0041] Similarly, in order to further improve the sound transmission effect, such as Figure 4 As shown, along the sound transmission direction of the sound transmission hole 231 , the sound transmission hole 231 is in a trumpet shape, with the narrow opening R2 located at the back of the box body, and the wide opening R1 located at the front of the box body. Figure 4 In the figure, L1 represents the routing in the upper surface layer of the second PCB board 22 , L2 represents the routing in the middle layer of the second PCB board 22 , and L3 represents the routing in the bottom surface layer of the second PCB board 22 .

[0042] Considering that there is a sound-transmitting area 23 in the LED module 2, the audience may be able to see the back of the screen through the sound-transmitting area 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 at a position facing the sound-transmitting area 23. Figure 5 shown.

[0043] It should be noted that the first PCB board 21, the second PCB board 22, and the third PCB board may be an integrated board or a split board that is welded together, without any specific limitation.

[0044] The second embodiment of the utility model 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, adjacent sound-transmitting LED boxes are spliced ​​and fixed via the detachable connection portion, the detachable connection portion may be a snap-fit ​​connection, or alignment holes may be provided on the side walls of the boxes, and the alignment holes of two boxes to be spliced ​​are connected and fixed via screws, wherein the above-mentioned "outer side surface" may 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 boxes at the top, bottom, left, or right.

[0045] Fig. 6A , 6B Two types of cabinet splicing methods with vertical HUB panels are shown. Figure 6C The HUB board is shown as a horizontal box splicing method. Of course, during specific implementation, it can be flexibly changed into other splicing methods according to on-site wiring requirements.

[0046] The third embodiment of the utility model provides a theater, such as Figure 7 As shown, it includes: a sound-transmitting LED screen 71, a video player 72, an auditorium 73, and a speaker 74.

[0047] The structure of the sound-transmitting LED screen 71 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 video player 72 stores a video source and can provide a video signal to the HUB board 3 of the box. It is specifically used to receive the detection signal of the sensor forwarded by the HUB board 3, and stop outputting the video signal to the HUB board 3 when the detection signal indicates that the first locking member or the second locking member is in an unlocked state, and normally output the video signal to the HUB board 3 when the detection signal indicates that the first locking member or the second locking member is in a locked state.

[0049] The auditorium 73 faces the sound-transmitting LED screen 71 and may be a one-layer or multi-layer stepped structure.

[0050] The speaker 74 is arranged on the back of the sound-transmitting LED screen 71, 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 arranged on both sides.

[0051] As a preferred solution, the sound-transmitting LED screen is in a curved shape and is bent in a direction away from the auditorium 73. A sound-absorbing layer is installed on the wall of the theater on the back side of the sound-transmitting LED screen. The curved sound-transmitting LED screen can be formed by splicing flat LED boxes. Each LED box is bent at a small angle relative to the previous box, so that the whole can present a curved shape.

[0052] The curved LED screen can give the audience a better sense of picture wrapping, but the existing curved LED screen that does not have the sound-transmitting function can focus and reflect the ambient noise from the theater to the auditorium again, causing a bad viewing and listening experience for the audience. The curved LED screen in this application has a sound-transmitting function, and the ambient noise from the theater can also be transmitted back to the back of the screen and absorbed by the sound-absorbing layer on the wall on the back side of the screen, and will not reach the auditorium, which can improve the audience's viewing experience.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sound-transmitting LED box with anti-piracy function, characterized in that: It comprises a box frame, in which a plurality of LED modules arranged in sequence are fixed; Each of the LED modules comprises a PCB board, wherein the PCB board comprises at least two first PCB boards arranged in parallel along a first direction, and two adjacent first PCB boards are connected by a plurality of second PCB boards arranged in parallel along a second direction, wherein the first direction is perpendicular to the second direction; a driver chip is arranged on the back of the first PCB board, and an LED lamp bead is arranged on the front of the second PCB board, and the driver chip and the LED lamp bead are electrically connected through a wiring arranged on the second PCB board; a sound-transmitting area without wiring is provided between each of the second PCB boards; a connector is arranged on one side of the back of the LED module, and the connector is electrically connected to the driver chip; The connectors of each LED module are located on the same side of the box; a HUB board is also fixed at the back of the box facing the connector, and the HUB board is used to connect the connectors of each LED module and distribute the video drive signal to each connector; The sound-transmitting LED box also includes a back cover movably connected to the box frame, and the back cover only covers the position where the HUB board is located; the back cover has at least one first locking piece, and the box frame is equipped with a second locking piece that matches the first locking piece; a sensor connected to the HUB board is provided at the first locking piece or the second locking piece, and the sensor is used to detect the switch state of the first locking piece or the second locking piece, and send the detection signal to the HUB board for forwarding.

2. The sound-transmitting LED box according to claim 1, characterized in that: The front position of the LED module directly facing the connector is provided with LED lamp beads, and the sound-transmitting area is not provided.

3. The sound-transmitting LED box according to claim 1, characterized in that: The sound-transmitting area is a sound-transmitting groove, and the length direction of the sound-transmitting groove is along the second direction.

4. The sound-transmitting LED box according to claim 3, characterized in that: Along the sound transmission direction of the sound transmission groove, the notch of the sound transmission groove changes gradually, and the narrow opening is located at the back side of the box body, and the wide opening is located at the front side of the box body.

5. The sound-transmitting LED box according to claim 1, characterized in that: The sound-transmitting area includes a third PCB board with a non-wiring design, and the third PCB board is provided with a plurality of sound-transmitting holes penetrating the third PCB board.

6. The sound-transmitting LED box according to claim 5, characterized in that: In the sound transmission direction along the sound transmission hole, the sound transmission hole is in a trumpet shape, with a narrow opening located at the back side of the box body and a wide opening located at the front side of the box body.

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

8. A sound-transmitting LED screen, characterized in that: include: A plurality of sound-transmitting LED boxes according to any one of claims 1 to 7, 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.

9. A cinema hall, characterized in that: include: The sound-transmitting LED screen as claimed in claim 8 receives video signals through the HUB board of each sound-transmitting LED box and distributes them to the connectors of each LED module; a video player, configured to receive a detection signal of a sensor forwarded by the HUB board, stop outputting a video signal to the HUB board when the detection signal indicates that the first locking member or the second locking member is in an unlocked state, and normally output a video signal to the HUB board when the detection signal indicates that the first locking member or the second locking member is in a locked state; An auditorium facing the sound-transparent LED screen; At least one sound box is arranged on the back of the sound-transmitting LED screen.

10. The theater according to claim 9, characterized in that: The sound-transmitting LED screen is in a curved shape and is curved in a direction away from the auditorium; The theater has a sound-absorbing layer installed on the wall on the back side of the sound-transmitting LED screen.

Images