Manufacturing method of sound-absorbing LED display screen device

Abstract

This invention provides a method for manufacturing a sound-absorbing LED display screen. The method includes: opening a plurality of first through holes on a PCB circuit board; opening a plurality of second through holes corresponding to the first through holes on a sound-absorbing mask; opening a plurality of cavities on the sound-absorbing mask, the cavities corresponding to the positions of the LED light-emitting elements; covering the front side of the LED display screen with the sound-absorbing mask having the second through holes; preparing a plastic back shell including a plurality of partitions, and spacing the plurality of partitions apart; opening a plurality of third through holes on the partitions; wrapping the back side of the LED display screen with the plastic back shell having the third through holes, such that the partitions divide the plastic back shell into a plurality of sound-absorbing cavities distributed front and back. This invention solves the problem that sound waves are reflected back and forth when they encounter the LED display screen, thus interfering with the sound reproduction effect.

Description

[0001] This invention is a divisional application, with parent application number 202410202664X, invention title: A sound-absorbing LED display device and its manufacturing method, application date: February 23, 2024. Technical Field

[0002] This invention relates to the field of electronic imaging technology, and specifically to a method for manufacturing a sound-absorbing LED display device. Background Technology

[0003] Compared to traditional cinema projection equipment, LED displays have rapidly developed in the cinema screen market due to their superior image display effects. However, because the structure of LED displays differs greatly from that of projection screens, their accompanying sound systems generate excessive reflected sound, leading to reverberation levels in the auditorium failing to meet acoustic standards. In the sound system, sound waves emitted by speakers reflect back and forth when encountering the LED display, resulting in excessively long reverberation times and interfering with the sound reproduction. Therefore, sound absorption treatment is needed for the sound waves incident on the LED screen. Currently, there is no technology in cinema LED display systems to address this issue.

[0004] In summary, the existing technology has the following problems: how to absorb the sound waves incident on the LED screen to avoid the sound waves reflecting back and forth when they encounter the LED display screen, thus interfering with the sound reproduction effect. Summary of the Invention

[0005] This invention provides a sound-absorbing LED display device and its manufacturing method to solve the problem in the prior art of how to absorb sound waves incident on an LED screen in order to avoid sound waves reflecting back and forth when they encounter the LED display screen and affecting the sound reproduction effect.

[0006] Therefore, the present invention proposes a sound-absorbing LED display device and its manufacturing method, wherein the sound-absorbing LED display device adopts the following technical solution:

[0007] This invention provides a sound-absorbing LED display device, comprising an LED display, a sound-absorbing mask, and a plastic back cover;

[0008] The LED display screen includes a PCB circuit board and an LED light source. The LED light source is disposed on the PCB circuit board, and a plurality of first through holes are formed on the PCB circuit board. The opening positions of the first through holes do not contact the LED light source or the circuit on the PCB circuit board.

[0009] The sound-absorbing mask is attached to the front side of the LED display screen. The sound-absorbing mask is also provided with several cavities, and the positions of the cavities correspond to those of the LED light-emitting elements.

[0010] The plastic back cover wraps around the back of the LED display screen. The plastic back cover includes multiple spaced partitions. The partitions are located away from the LED display screen. The partitions are uniformly provided with third through holes. The partitions divide the plastic back cover into multiple sound-absorbing cavities distributed front and back.

[0011] Furthermore, the sound-absorbing mask is provided with a plurality of second through holes corresponding to the first through hole;

[0012] Furthermore, the partition and the LED display screen are arranged in parallel.

[0013] Furthermore, the second through hole has a hollow frustum-shaped structure.

[0014] Furthermore, the first through hole is cylindrical, and the diameter of the first through hole is the same as the diameter of the second through hole.

[0015] Furthermore, at least one of the sound-absorbing cavities is provided with sound-absorbing material.

[0016] Furthermore, the PCB circuit board is provided with multiple LED light emitters, and the multiple LED light emitters form an array structure on the PCB circuit board.

[0017] Furthermore, the sound-absorbing mask material includes polyurethane or aluminum foam.

[0018] Furthermore, the PCB circuit board is provided with power lines and signal lines, and the LED display screen is connected to the control system through the power lines and signal lines.

[0019] The present invention also provides a method for manufacturing a sound-absorbing LED display screen, wherein the method can produce the sound-absorbing LED display screen device described in any one of the above descriptions, the method comprising:

[0020] Several first through holes are formed on the PCB circuit board;

[0021] A plurality of second through holes corresponding to the first through holes are made on the sound-absorbing mask; a plurality of cavities are made on the sound-absorbing mask, the cavities being positioned corresponding to the LED light-emitting elements.

[0022] Cover the front side of the LED display screen with the sound-absorbing mask after the second through hole is opened;

[0023] Prepare a plastic back cover comprising a plurality of partitions, and space the plurality of partitions apart;

[0024] Several third through holes are made in the partition plate;

[0025] The plastic back cover with the third through hole is wrapped around the back of the LED display screen, so that the partition divides the plastic back cover into multiple sound-absorbing cavities distributed in the front and back.

[0026] The sound-absorbing LED display device provided by this invention is based on the structural and display characteristics of LED displays. It employs a design concept of a sound-absorbing mask + perforated sound absorber + rear sound-absorbing cavity. Specifically, the sound-absorbing mask is placed on the front side of the LED display. To improve sound absorption, several first through holes are formed on the PCB circuit board of the LED display to reduce sound wave reflection. Additionally, a plastic back shell covers the rear side of the LED display, and a partition is evenly provided with third through holes. The partition divides the plastic back shell into multiple sound-absorbing cavities distributed front and rear. The plastic back shell further increases the frequency range of sound absorption and improves the sound absorption coefficient. This invention solves the problem of sound waves reflecting back and forth when encountering an LED display, thus interfering with the sound reproduction effect. It can achieve specific absorption of sound waves, effectively reducing reverberation time and improving the sound reproduction effect of the cinema LED display system. Attached Figure Description

[0027] Figure 1 This is a side view of a sound-absorbing LED display device according to the present invention;

[0028] Figure 2 This is a front view of a sound-absorbing LED display device according to the present invention;

[0029] The following are the reference numerals: 1. LED display screen; 2. Sound-absorbing mask; 3. Plastic back cover; 11. PCB circuit board; 111. LED light source; 112. First through hole; 21. Second through hole; 31. Partition; 311. Third through hole; 4. Sound-absorbing cavity; 41. Sound-absorbing material; 42. Air layer. Detailed Implementation

[0030] To provide a clearer understanding of the technical features, objectives, and effects of this invention, the invention is now described.

[0031] Example 1

[0032] The sound-absorbing LED display device provided by this invention, such as Figure 1 and Figure 2 As shown, it includes an LED display screen 1, a sound-absorbing mask 2, and a plastic back cover 3;

[0033] The LED display screen 1 includes a PCB circuit board 11 and LED light emitters 111. The LED light emitters 111 are disposed on the PCB circuit board 11. The LED display screen 1 can be square or round, and can also be configured as a flat screen or curved screen. The LED light emitters are connected to the PCB circuit board, for example, by soldering, via connection, or other methods. The PCB circuit board 11 has multiple LED light emitters 111, each forming an LED pixel unit. The LED light emitters can be, for example, LED lamps, integrated LED tubes, packaged LED chips, unpackaged bare LED chips, non-integrated LED chips, or any other form of LED light emitter. The multiple LED light emitters 111 form an array structure on the PCB circuit board 11. Figure 2 This is an example of an LED light-emitting element arrangement. In practical applications, the arrangement of the pixel unit array of the LED screen can be selected according to the specific occasion.

[0034] The PCB circuit board 11 has a plurality of first through holes 112, the first through holes 112 being, for example, cylindrical; the opening position of the first through holes 112 does not contact the LED light source 111 and the circuit on the PCB circuit board 11, so as to avoid affecting the normal use of the LED display screen;

[0035] The sound-absorbing mask 2 is attached to the front side of the LED display screen 1, positioned above and in direct contact with the PCB circuit board 11, while avoiding the LED light-emitting element 111. The sound-absorbing mask 2 is made of porous sound-absorbing materials such as polyurethane or aluminum foam, or silicone. The sound-absorbing mask 2 has several second through holes 21 corresponding to the first through hole 112. The positions of the first through hole 112 and the second through hole 21 are aligned to reduce sound wave reflection and improve the sound absorption effect of the LED display screen 1. Furthermore, the diameters of the first through hole 112 and the second through hole 21 are the same to further reduce sound wave reflection, resulting in better sound absorption. The second through hole 21 may be, for example, a hollow frustum-shaped structure to effectively increase the contact area with sound waves and reduce the thickness of the micro-perforations in the second through hole. The sound-absorbing mask 2 is also provided with several cavities, the positions of which correspond to the LED light-emitting elements 111 to avoid the sound-absorbing mask 2 blocking the light emission of the LED light-emitting elements 111; the plastic back shell 3 wraps around the rear side of the LED display screen 1, the left side of the plastic back shell 3 is open, and the right side, top and bottom of the plastic back shell 3 are provided with outer shells, the top and bottom outer shells are sealed to the LED display screen 1. The plastic back shell 3 includes a plurality of spaced partitions 31, the partitions 31 are arranged parallel to the LED display screen 1, and the height of the partitions is the same as the height of the LED display screen 1. The partitions 31 are located inside the plastic back shell and away from the LED display screen 1, so that the partitions divide the plastic back shell 3 into a plurality of sound-absorbing cavities 4 distributed front and back, thereby increasing the frequency range of sound absorption of the device and improving the sound absorption coefficient. The partitions 31 are uniformly provided with third through holes 311 to reduce sound wave reflection, and at least one of the sound-absorbing cavities 4 is provided with sound-absorbing material 41 to ensure the sound absorption effect. Figure 2 As shown, in this example, the plastic back cover 3 has two partitions, which separate the plastic back cover 3 and the LED display screen 1 into three sound-absorbing cavities 4. The first two layers are reserved as air layers 42, and the last layer is filled with sound-absorbing material 41.

[0036] Furthermore, the PCB circuit board 11 is provided with power lines and signal lines, and the LED display screen 1 is connected to the control system through the power lines and signal lines.

[0037] In addition, the present invention also provides a second embodiment, in which the sound-absorbing mask 2 located on the front side of the display screen 1 does not need to be opened or have a sound-absorbing microstructure (a lightweight structure to assist sound absorption) set, and the rest of the structural settings are the same as in the first embodiment.

[0038] Furthermore, the present invention also provides a method for manufacturing a sound-absorbing LED display screen, which can produce any of the aforementioned sound-absorbing LED display screen devices. The method includes:

[0039] A plurality of first through holes 112 are formed on the PCB circuit board 11;

[0040] Several cavities are formed on the sound-absorbing mask 2, and the positions of the cavities correspond to the positions of the LED light-emitting elements.

[0041] The sound-absorbing mask 2 is attached to the front side of the LED display screen;

[0042] Prepare a plastic back cover 3 including a plurality of partitions 31, and arrange the plurality of partitions 31 at intervals;

[0043] A plurality of third through holes 311 are formed on the partition plate 31;

[0044] The plastic back shell 3 with the third through hole is wrapped around the back of the LED display screen 1, so that the partition divides the plastic back shell 3 into multiple sound-absorbing cavities 4 distributed in the front and back.

[0045] Furthermore, before attaching the sound-absorbing mask 2 to the LED display screen, a plurality of second through holes 21 corresponding to the first through holes 112 are opened on the sound-absorbing mask 2.

[0046] This invention provides a sound-absorbing LED display device and its manufacturing method. The structure of the sound-absorbing LED display device is as follows: a sound-absorbing mask 2 is set in front of the LED display 1. To improve the sound absorption effect, several first through holes 112 are formed on the PCB circuit board of the LED display 1, and several second through holes 21 corresponding to the first through holes 112 are provided on the sound-absorbing mask 2 to reduce sound wave reflection and improve the sound absorption effect. In addition, a plastic back shell 3 is wrapped around the rear side of the LED display 1, and a partition divides the plastic back shell 3 into multiple sound-absorbing cavities 4 distributed front and rear. The setting of the plastic back shell 3 further increases the frequency range of sound absorption of the device and improves the sound absorption coefficient. The invention adopts a technical solution of sound-absorbing mask + perforated sound absorber + back-screen sound-absorbing cavity, which improves the sound absorption effect of the LED display and solves the problem of sound waves reflecting back and forth when encountering the LED display, thus interfering with the sound reproduction effect. This ensures that more sound details can be reproduced and displayed in the cinema, enhancing the audience's viewing experience.

[0047] The above description is merely an illustrative embodiment of the present invention and is not intended to limit the scope of the invention. The various components of the present invention can be combined with each other without conflict. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention should fall within the scope of protection of the present invention.

Claims

1. A method for making a sound-absorbing LED display screen, characterized in that, The method described above enables the production of sound-absorbing LED display devices, and the method includes: Several first through holes (112) are made on the PCB circuit board (11). Several cavities are opened on the sound-absorbing mask (2), and the positions of the cavities and the LED light-emitting body (111) correspond to each other; The sound-absorbing mask (2) with the second through hole opened is attached to the front side of the LED display screen (1); Prepare a plastic back shell (3) including multiple partitions (31) and arrange the multiple partitions (31) at intervals; Several third through holes (311) are made on the partition (31); The plastic back shell (3) with the third through hole is wrapped around the back of the LED display screen (1), so that the partition divides the plastic back shell (3) into multiple sound-absorbing cavities (4) distributed in the front and back.

2. The method for manufacturing a sound-absorbing LED display screen according to claim 1, characterized in that, The sound-absorbing LED display screen includes an LED display screen (1), a sound-absorbing mask (2), and a plastic back shell (3). The LED display screen (1) includes a PCB circuit board (11) and an LED light source (111). The LED light source (111) is disposed on the PCB circuit board (11) and is connected to the PCB circuit board (11) by soldering and through-hole connection.

3. The method for manufacturing a sound-absorbing LED display screen according to claim 1, characterized in that, Before attaching the sound-absorbing mask (2) to the LED display screen, a plurality of second through holes (21) corresponding to the first through hole (112) are provided on the sound-absorbing mask (2) to reduce the reflection of sound waves.

4. The method for manufacturing a sound-absorbing LED display screen according to claim 1, characterized in that, At least one of the sound-absorbing cavities (4) is provided with sound-absorbing material (41) to ensure sound absorption effect.

5. The method for manufacturing a sound-absorbing LED display screen according to claim 1, characterized in that, The plastic back shell (3) has two partitions that separate the plastic back shell (3) and the LED display screen (1) into three sound-absorbing cavities (4). The first two layers are reserved as air layers (42), and the last layer is filled with sound-absorbing material (41).

6. The method for manufacturing a sound-absorbing LED display screen according to claim 1, characterized in that, The partition (31) and the LED display screen (1) are arranged in parallel, and the height of the partition (31) is the same as the height of the LED display screen (1).

7. The method for manufacturing a sound-absorbing LED display screen according to claim 3, characterized in that, The first through hole (112) is cylindrical, and the diameter of the first through hole (112) is the same as the diameter of the second through hole (21).

8. The method for manufacturing a sound-absorbing LED display screen according to claim 1, characterized in that, The LED display screen (1) is square or round.

9. The method for manufacturing a sound-absorbing LED display screen according to claim 1, characterized in that, The LED display screen (1) is configured as a flat screen or a curved screen.

10. The method for manufacturing a sound-absorbing LED display screen according to claim 2, characterized in that, The LED light emitter (111) is an LED lamp, an integrated LED tube, a packaged LED chip, an unpackaged bare LED chip, or an unintegrated LED chip.

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