CN115460487A

CN115460487A - Sound system of LED display screen

Info

Publication number: CN115460487A
Application number: CN202211041930.2A
Authority: CN
Inventors: 傅若清; 张雨; 顾炜; 郭克威
Original assignee: Cfg Barco Beijing Electronics Co ltd
Current assignee: Cfg Barco Beijing Electronics Co ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-12-09
Also published as: WO2024045560A1

Abstract

The embodiment of the invention provides a sound system of an LED display screen, which comprises a first polar plate and a second polar plate which are arranged between adjacent box body frames of the LED spliced screen, wherein a vibration film is arranged in parallel and is arranged between the first polar plate and the second polar plate at an interval, the two polar plates and the vibration film form a double-capacitor structure, an audio signal input system driving circuit and a high-voltage loading device cooperatively drive the vibration film to generate sound to transmit audio and position information (2D or 3D audio) to a watching position in front of the LED display screen, a large number of frame vibration film audio systems in the LED box body can enable sound to be accurately positioned on a picture, and simultaneously, the frame vibration film audio systems and the traditional audio system outside the LED screen form three-dimensional audio together, so that the problems that the LED display screen cannot be punched and sound transmission is influenced are solved.

Description

Sound system of LED display screen

Technical Field

The invention relates to the field of sound systems, in particular to a sound system of an LED display screen.

Background

In the high-end professional display field, in order to pursue the position matching of accurate picture content and sound, the audio amplifier is required to be installed at the rear of the display screen, and the sound is conducted to audiences in front of the screen through the display screen. The traditional method of conducting sound to viewers in front of the screen is to regularly spread sound-transparent holes of uniform size over the screen, so that the actual sound position can be restored to the maximum extent.

In implementing the present invention, the applicant has found the following problems in the prior art: when the LED display screen is applied to the display field, due to the product characteristics of the LED display screen, the LED display screen cannot be perforated or the real sound position cannot be restored, so that the sound positioning and the sound effect are influenced.

Disclosure of Invention

The invention provides a sound system of an LED display screen, which aims to solve the problems that the LED display screen cannot transmit sound, cannot restore the real sound position and influences the sound effect.

The LED display screen includes: the concatenation screen that a plurality of boxes 6 combinations formed, every box 6 includes: frame and be located the display screen unit 7 of frame, the sound system setting of LED display screen is between two adjacent boxes, the sound system of LED display screen includes:

two pole plates 2;

two of the plates 2 comprise: the vibration isolation box comprises a first polar plate 21, a second polar plate 22 and a vibration film 1, wherein the first polar plate 21 is arranged on a frame of the first box body, the second polar plate 22 is arranged on a frame of the second box body, the vibration film 1 is arranged between the first polar plate 21 and the second polar plate 22, and the first polar plate 21, the second polar plate 22 and the vibration film 1 are arranged in parallel at intervals;

the first end of the audio boosting transformer 3 is connected to the first polar plate 21, and the second end of the audio boosting transformer 3 is connected to the second polar plate 22;

the output positive end of the high-voltage loading device is connected to the vibrating membrane 1, and the negative end of the high-voltage loading device 4 is connected to the third end of the audio boosting transformer 3; and an audio signal input system 5 connected to the fourth end of the audio step-up transformer 3.

Each box 6 is a rectangular parallelepiped shape, and each box 6 includes: two transversely arranged frames and two vertically arranged frames.

The diaphragm 1 has a flat rectangular plate shape.

And the sound system of the LED display screen is vertically arranged between the adjacent box bodies.

And the sound system of the LED display screen is transversely arranged between the adjacent box bodies.

And a sound absorption layer is arranged on the wall surface behind the LED screen.

And a sound shielding layer is pasted on the surface of the frame of the LED box body.

The audio booster transformer realizes boosting through an equivalent circuit or electromagnetic control.

The high-voltage loading device is a high-voltage polarization power supply.

The LED display screen comprises a plurality of sound systems, one sound system is arranged between any two adjacent box bodies 6, and each vibrating membrane 1 is independently arranged and is not connected with other vibrating membranes.

The technical scheme for solving the problems is as follows: in the LED spliced screen composed of a plurality of box bodies, the polar plates of two frames of the adjacent box bodies are used as two polar plates of a capacitor, a vibrating membrane is added in the gap between the two polar plates, and the voltage on the polar plates on the two sides of the vibrating membrane and the vibrating membrane forms a sound system of the LED display screen which drives the vibrating membrane to work by utilizing the variable voltage added on the polar plates of the capacitor. All clearance position installations between every box frame the sound system of LED display screen, corresponding audio signal input system is according to the spatial position of audio frequency in the system, the sound system of the LED display screen of the corresponding box frame position of drive, see through the space transmission between the box with the sound wave and give the audience, the sound system of the LED display screen in a large amount of LED boxes and the outer traditional audio system of LED screen constitute three-dimensional audio matrix jointly, reached and transmitted audio frequency and positional information (2D or 3D audio frequency) the position of watching before the LED display screen in high-end professional LED field, improve the effect of audio quality.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram illustrating the working principle of a polar plate and a diaphragm of a sound system of an LED display screen according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a sound system of an LED display screen according to an embodiment of the present invention;

fig. 3 is a schematic front structural diagram of an LED display screen of a sound system including the LED display screen according to an embodiment of the present invention.

The reference numerals are represented as:

1. a vibrating membrane; 2. a polar plate; 21. a first electrode plate; 22. a second polar plate; 3. an audio boost transformer; 4. a high-pressure loading device; 5. an audio signal input system; 6. a box body; 7. and a display screen unit.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The above technical solutions of the embodiments of the present invention are described in detail below with reference to the accompanying drawings by referring to specific application examples, and reference may be made to the foregoing related descriptions for technical details that are not described in the implementation process.

As shown in fig. 3, the LED display screen includes: a plurality of boxes 6 make up and form the concatenation screen, and every box 6 includes: the LED spliced screen comprises a frame and display screen units 7 positioned in the frame, wherein the display units can independently become a small display screen, or a plurality of display screen units can be spliced to form the LED spliced screen, and a user can set the size of the spliced screen as required to meet the user requirement;

as shown in fig. 3, the sound system of the LED display screen is disposed between two adjacent box bodies, a gap exists between the two adjacent box bodies, and the sound system of the LED display screen is disposed in the gap, so that the existing space is fully utilized, the sound transmission effect is better, the cost is saved, and the display function of the display screen is not damaged while the display screen makes spontaneous sound;

as shown in fig. 1, the sound system of the LED display screen includes:

the two polar plates 2 can form a capacitor, so that the aim of driving a sound system of the LED display screen to work is fulfilled;

as shown in fig. 1, the plate 2 includes: the first polar plate 21 is arranged on the frame of the first box body, the second polar plate 2 is arranged on the frame of the second box body, and the vibrating membrane 1 is arranged between the first polar plate 21 and the second polar plate 22; the first polar plate 21, the second polar plate 22 and the vibrating membrane 1 are arranged in parallel and at intervals; the two polar plates are arranged in parallel with the vibrating membrane, the polar plates are electrified to form a capacitor plate, the vibrating membrane 1 is driven to work and sound through voltage change, when the capacitor plate is used for middle-high frequency sound production, the distance between the vibrating membrane 1 and the polar plate 2 is 1-2 mm, and when the capacitor plate is in full-frequency amplitude, the distance is larger, and the general distance is 3-5 mm; the vibrating membrane 1 is made of various materials, such as paper, plastic, metal, synthetic fiber and the like, the pole plate can be square, rectangular and the like, the pole plate can be made of metal conductors such as iron, magnesium alloy, die-cast aluminum and the like, and the working of the vibrating membrane is controlled through the voltage change of the pole plate; the polar plate can also use electromagnetic materials, such as hard magnetic materials (for example barium ferrite), soft magnetic materials (for example, electromagnetic pure iron, electrolytic iron and carbonyl iron), and the like, and the strength of output current is controlled through an audio input system, the strength of a magnetic field between the electromagnetic materials is controlled, the amplitude of the vibration film is further controlled, and finally the sound is controlled.

As shown in fig. 1, a first end of the audio step-up transformer 3 is connected to the first pole plate 21, and a second end of the audio step-up transformer 3 is connected to the second pole plate 22;

as shown in fig. 1, the positive terminal of the high voltage loading device 4 is connected to the diaphragm 1, and the negative terminal of the high voltage loading device 4 is connected to the third terminal of the audio step-up transformer 3; and an audio signal input system 5 (comprising a power amplifier system and an audio drive control) connected to the fourth end of the audio step-up transformer 3.

The audio frequency input by the audio signal input system 5 utilizes the synergistic effect of the audio boosting transformer 3 and the high-voltage loading device 4 to promote the surface of the vibrating membrane 1 (movable electrode) to accumulate charges with a certain density, and the two conductive electrode plates 2 and the vibrating membrane 1 form a double-capacitor structure: the audio alternating signal output by the audio signal input system is boosted by 100-200 times through the audio booster transformer and input to the two polar plates 2, and the vibrating membrane 1 injected with 3 KV-5 KV high-voltage static electricity by the high-voltage loading device 4 can vibrate between the polar plates to make a sound. The signal connection among the vibrating membrane, the polar plate, the audio boosting transformer 3, the high-voltage loading device 4 and the audio signal input system 5 is realized through wires, and the gaps of the wires among the boxes are wired and connected to the back of the boxes or the display screen unit.

As shown in fig. 3, each case 6 has a rectangular parallelepiped shape, and each case 6 includes: two transversely arranged frames and two vertically arranged frames. The frame of the box body becomes the polar plate, so that the invention can utilize the existing materials to form a capacitor, and drive the vibrating membrane to work through the voltage on the capacitor plate, and the polar plate can also adopt electromagnetic materials to control the vibrating membrane to work.

The shape of the vibrating membrane 1 is a straight rectangular flat plate, and the thickness of the vibrating membrane 1 is 2-12 mu m, so that the vibrating membrane is convenient to manufacture and install.

As shown in FIG. 3, the sound system of the LED display screen is vertically arranged between the adjacent boxes. Therefore, the gap between the left and right adjacent box bodies can be fully utilized, the sound transmission range is enlarged, and the sound positioning effect is enhanced.

As shown in FIG. 3, the sound system of the LED display screen is transversely arranged between the adjacent boxes. Therefore, the gap between the two adjacent box bodies can be fully utilized, the sound transmission range is enlarged, and the sound positioning effect is enhanced.

Horizontal and vertical clearance of adjacent box all sets up the sound system of LED display screen can be more abundant conduct the audience before the screen with the sound.

The wall behind the LED screen is provided with a sound absorption layer, and the sound absorption layer is fully distributed with sound absorption materials. Eliminate noise and improve sound effect quality.

First polar plate 21 inlays on the frame of first box, and second polar plate 22 inlays on the frame of second box, and every LED box frame surface pastes and covers the sound shielding layer, the sound shielding layer is located the frame surface other parts outside first polar plate 21 or the second polar plate 22, prevents the shielding device of sound resonance, crosstalking, does not influence the electrically conductive function of two polar plates simultaneously, and the sound shielding layer can adopt thickness 3mm, and the hardness is made for 30D's soft rubber.

The audio booster transformer realizes boosting by an equivalent circuit or electromagnetic control, and the boosting is 100-200 times and 100-1000V.

The high-voltage loading device 4 is a high-voltage polarized power supply, and the inside of the power supply can be realized by adopting a PWM control technology and a modular circuit design to generate 3 KV-5 KV DC high voltage.

As shown in fig. 3, the number of the sound system of the LED display screen is a plurality of, and one is arranged between any two adjacent boxes the sound system of the LED display screen, each vibration film 1 is independently arranged and is not connected with other vibration films, so that when the vibration films are damaged, only the damaged vibration films need to be replaced, other vibration films are not affected, the later maintenance is facilitated, one is arranged between any two adjacent boxes the sound system of the LED display screen, the sound transmission carrier is added, the sound transmission range is expanded, and the sound transmission quality is improved.

Installing the 4-by-3 matrix LED display mosaic screen shown in fig. 3 on an LED installation support body, such as a bearing wall, 4 horizontal boxes, and 3 vertical boxes, wherein each box is, for example, a square box, the sound system of the LED display screen is arranged between two adjacent boxes, three columns are vertically arranged, each column is 3, and there are 9 sound systems of the LED display screen; the LED display screen sound system comprises a sound system, a sound system and a sound system, wherein the sound system is transversely arranged in two rows, 4 sound systems are arranged in each row, the number of the sound systems is totally 8, the sound systems of the LED display screens are transversely and vertically arranged, the structure size can be the same, so that the LED display screens can be conveniently installed and replaced, and the sound effect is the same.

Positive and negative voltages are respectively applied to the box body frames on the two sides of the vibrating membrane 1 and the vibrating membrane to form capacitors, and a sound system of the LED display screen driving the vibrating membrane to work by using the variable voltage applied to the capacitor electrode plates is formed. As shown in fig. 2, the audio signal input system 5 drives the polar plate and the diaphragm corresponding to the frame of the box according to the spatial position of the audio: the audio signal is boosted by 100-200 times through the audio booster transformer 3, and is input to the two polar plates 2, and the vibration membrane 1 which is injected with 3 KV-5 KV high-voltage static electricity by the high-voltage loading device 4 generates vibration between the polar plates to make sound. The sound waves are transmitted to the audience through the gaps between the boxes. As shown in fig. 3, the audio step-up transformer 3 and the high-voltage loading device 4 are arranged behind the box body, and one audio step-up transformer 3 and one high-voltage loading device 4 can be used for controlling all the vibration membranes to work, so that a plurality of vibration membranes are arranged, the manufacturing and installation are convenient, and the space occupation and the cost are reduced; the design can also be made such that one vibration film only corresponds to one audio boosting transformer 3 and one high-voltage loading device 4, each audio boosting transformer 3 and each high-voltage loading device 4 respectively control the corresponding vibration film to work, the whole LED display screen is provided, if a plurality of vibration films exist, the same number of audio boosting transformers 3 and high-voltage loading devices 4 are provided, in this way, the sound system of each LED display screen independently exists and is not influenced by other surrounding sound systems, the whole LED display screen can also be divided into groups, for example, each 6 LED display screen units form a group, each group of LED display screens is distributed with one audio boosting transformer and one high-voltage loading device, the audio boosting transformer and the high-voltage loading device in each group control the vibration film in the group to work, and therefore, the purposes of bringing more vibration films, facilitating manufacturing and installation, reducing space occupation and saving cost can be achieved, when faults occur, faults can be locally checked and eliminated, and the troubleshooting range is reduced. As shown in fig. 3, the audio input system 5 in the figure includes a power amplifier system and an audio driving controller, the power amplifier system drives the sound box to work, the audio input system 5 and the traditional audio system outside the LED display screen share one set of audio input system 5, and are connected to the traditional audio system and the sound system of the LED display screen through different connecting wires. The sound system of the LED display screen is arranged between any two adjacent boxes, when the LED box is large in size, a large number of sound systems of the LED display screen can be arranged, and the frame diaphragm audio systems in the LED boxes and the traditional audio system outside the LED screen jointly form three-dimensional audio, so that the requirement of a large venue on sound pressure is met. The large-scale LED display screen manufactured by the technology can meet the application requirements of an LED movie screen, an LED audio-video display screen and the like. Certain gaps exist among the LED box bodies, and for the LED screen with non-minimum limit physical distance, additional gaps can be reserved among the box bodies according to needs. With the development of Mini LED and Micro LED technologies, the size of the LED lamp bead is developed towards miniaturization, more gaps between the box bodies of LED products can be expected to be utilized, and more gaps are more beneficial to the practical application of the invention.

It should be understood that the specific order or sequence of steps in the processes disclosed is an example of an exemplary method. Based upon design preferences, it is understood that the specific order or sequence of steps in the processes may be rearranged without departing from the scope of the present disclosure. The accompanying method claims present elements of the various steps in a sample order, and are not intended to be limited to the specific order or acts described.

In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, invention lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. To those skilled in the art; various modifications to these embodiments will be readily apparent, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".

Those of skill in the art will also appreciate that the various illustrative logical blocks, elements, and steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate the interchangeability of hardware and software, various illustrative components, elements, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design requirements of the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present embodiments.

The various illustrative logical blocks, or elements, described in connection with the embodiments disclosed herein may be implemented or performed with a general purpose processor, a digital signal processor, an Application Specific Integrated Circuit (ASIC), a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. For example, a storage medium may be coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC, which may be disposed in a user terminal. In the alternative, the processor and the storage medium may reside in different components in a user terminal.

In one or more exemplary designs, the functions described above in connection with the embodiments of the invention may be implemented in hardware, software, firmware, or any combination of the three. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media that facilitate transfer of a computer program from one place to another. Storage media may be any available media that can be accessed by a general purpose or special purpose computer. For example, such computer-readable media can include, but is not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to carry or store program code in the form of instructions or data structures and which can be read by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Additionally, any connection is properly termed a computer-readable medium, and, thus, is included if the software is transmitted from a website, server, or other remote source via a coaxial cable, fiber optic cable, twisted pair, digital Subscriber Line (DSL), or wirelessly, e.g., infrared, radio, and microwave. Such discs (disk) and disks (disc) include compact disks, laser disks, optical disks, DVDs, floppy disks and blu-ray disks, where magnetic discs generally reproduce data magnetically, while disks generally reproduce data optically with lasers. Combinations of the above may also be included in the computer-readable medium.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A sound system for an LED display screen, the LED display screen comprising: the concatenation screen that a plurality of boxes (6) combination formed, every box (6) includes: frame and be located display screen unit (7) of frame, the sound system setting of LED display screen is between two adjacent boxes, the sound system of LED display screen includes:

two pole plates (2);

two of said plates (2) comprising: the vibrating diaphragm is characterized by comprising a first polar plate (21) arranged on the frame of the first box body, a second polar plate (22) arranged on the frame of the second box body, and a vibrating diaphragm (1) arranged between the first polar plate (21) and the second polar plate (22); the first polar plate (21), the second polar plate (22) and the vibrating membrane (1) are arranged in parallel at intervals;

an audio step-up transformer (3), a first end of the audio step-up transformer (3) being connected to the first pole plate (21), a second end of the audio step-up transformer (3) being connected to the second pole plate (22);

the positive end of the high-voltage loading device is connected to the vibrating membrane (1), and the negative end of the high-voltage loading device (4) is connected to the third end of the audio boosting transformer (3); and the audio signal input system (5) is connected to the fourth end of the audio boosting transformer (3).

2. The sound system for an LED display screen according to claim 1, wherein each box (6) has a rectangular parallelepiped shape, each box (6) comprising: two transversely arranged frames and two vertically arranged frames.

3. The sound system of an LED display screen as claimed in claim 1, characterized in that the diaphragm (1) is shaped as a flat rectangular plate.

4. The sound system of an LED display screen of claim 1, wherein the sound system of an LED display screen is vertically disposed between adjacent boxes.

5. The sound system of an LED display screen of claim 1, wherein the sound system of an LED display screen is laterally disposed between adjacent housings.

6. The sound system for an LED display screen of claim 1, wherein a sound absorbing layer is provided on the supporting wall behind the LED screen.

7. The sound system of the LED display screen as claimed in claim 1, wherein the first polar plate (21) is embedded on the frame of the first box body, the second polar plate (22) is embedded on the frame of the second box body, and a sound shielding layer is attached to the surface of the frame of each LED box body and is positioned outside the first polar plate (21) or the second polar plate (22).

8. The sound system of an LED display screen as claimed in claim 1, characterized in that the audio step-up transformer (3) achieves the step-up by means of an equivalent circuit or electromagnetic control.

9. The sound system for LED screens according to claim 1, characterized in that the high voltage loading means (4) is a high voltage polarized power supply.

10. The sound system of the LED display screen according to claim 1, wherein the number of the sound systems of the LED display screen is multiple, one sound system of the LED display screen is arranged between any two adjacent boxes (6), and each diaphragm (1) is independently arranged and is not connected with other diaphragms.