WO2024045560A1 - 一种led显示屏的声音系统 - Google Patents

一种led显示屏的声音系统 Download PDF

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Publication number
WO2024045560A1
WO2024045560A1 PCT/CN2023/081922 CN2023081922W WO2024045560A1 WO 2024045560 A1 WO2024045560 A1 WO 2024045560A1 CN 2023081922 W CN2023081922 W CN 2023081922W WO 2024045560 A1 WO2024045560 A1 WO 2024045560A1
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Prior art keywords
display screen
led display
sound
audio
sound system
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PCT/CN2023/081922
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English (en)
French (fr)
Inventor
傅若清
张雨
顾炜
郭克威
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中影巴可（北京）电子有限公司
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Publication of WO2024045560A1 publication Critical patent/WO2024045560A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein

Definitions

  • the invention relates to the field of sound systems, and in particular to a sound system for an LED display screen.
  • the present invention provides a sound system for the LED display screen.
  • the LED display screen includes: a splicing screen formed by a combination of multiple cabinets 6.
  • Each cabinet 6 includes a frame and a display screen unit 7 located in the frame.
  • the sound system of the LED display screen is arranged in two adjacent cabinets. Between the bodies, the sound system of the LED display screen includes:
  • the two pole plates 2 include: a first pole plate 21, which is arranged on the frame of the first box; a second pole plate 22, which is arranged on the frame of the second box; and a vibrating membrane 1, which is arranged on the first pole. Between the plate 21 and the second plate 22, the first plate 21, the second plate 22 and the vibrating membrane 1 are parallel and interval setting;
  • Audio step-up transformer 3 the first end of the audio step-up transformer 3 is connected to the first plate 21, and the second end of the audio step-up transformer 3 is connected to the second plate 22;
  • the positive terminal of the output of the high-voltage loading device is connected to the diaphragm 1
  • the negative terminal of the high-voltage loading device 4 is connected to the third end of the audio boost transformer 3
  • the audio signal input system 5 is connected to the audio boost transformer The fourth end of 3.
  • Each box 6 is in the shape of a rectangular parallelepiped, and each box 6 includes: two horizontally arranged borders and two vertically arranged borders.
  • the shape of the diaphragm 1 is a straight rectangular flat plate.
  • the sound system of the LED display screen is arranged vertically between adjacent boxes.
  • the sound system of the LED display screen is arranged horizontally between adjacent boxes.
  • a sound-absorbing layer is installed on the wall behind the LED screen.
  • the surface of the LED box frame is covered with a sound shielding layer.
  • the audio step-up transformer achieves voltage boost through equivalent circuit or electromagnetic control.
  • the high-voltage loading device is a high-voltage polarized power supply.
  • Each vibrating membrane 1 is set independently and is not connected to other vibrating membranes. .
  • the technical solution of the present invention to solve the problem is: in an LED splicing screen composed of multiple boxes, the plates of the two frames of adjacent boxes serve as the two plates of the capacitor, and vibration is added to the gap between the two plates.
  • the membrane, the plates on both sides of the vibrating membrane and the voltage on the vibrating membrane form a sound system that uses the changing voltage applied to the capacitor plates to drive the vibrating membrane to operate the LED display screen.
  • the sound system of the LED display screen is installed in all gaps between each cabinet frame.
  • the corresponding audio signal input system in the system drives the sound system of the LED display screen corresponding to the position of the cabinet frame according to the spatial position of the audio.
  • the sound waves are transmitted to the audience through the gaps between the boxes.
  • the matrix achieves the effect of transmitting audio and its position information (2D or 3D audio) to the viewing position in front of the LED display in the high-end professional LED field to improve the quality of sound effects.
  • Figure 1 is a schematic diagram of the working principle of the plate and vibrating membrane of the sound system of an LED display screen provided by an embodiment of the present invention
  • Figure 2 is a schematic structural diagram of a sound system of an LED display screen provided by an embodiment of the present invention.
  • FIG. 3 is a schematic front structural view of an LED display screen including a sound system of an LED display screen provided by an embodiment of the present invention.
  • the reference symbols are expressed as: 1. Vibrating membrane; 2. Plate; 21. First plate; 22. Second plate; 3. Audio boost transformer; 4. High voltage loading device; 5. Audio signal input system; 6. Box; 7 , display unit.
  • the present invention provides a sound system for the LED display screen.
  • the LED display screen includes: multiple boxes 6 combined to form a splicing screen.
  • Each box 6 includes: a frame, and a display unit 7 located within the frame.
  • the display unit can independently become a small display screen. , or multiple display units can be spliced to form an LED splicing screen. Users can The size of the splicing screen needs to be set to meet user needs;
  • the sound system of the LED display screen is set between two adjacent boxes. There is a gap between the adjacent boxes.
  • the sound system of the LED display screen is set in the gap to make full use of the existing sound system. With space, the sound transmission effect is better, and at the same time, it saves costs, and the display screen can make self-sound without damaging the display function of the display screen;
  • the sound system of the LED display screen includes:
  • Only two polar plates 2 can form a capacitor, thereby achieving the purpose of driving the sound system of the LED display screen;
  • the pole plate 2 includes: a first pole plate 21, which is arranged on the frame of the first box, a second pole plate 2, which is arranged on the frame of the second box, and a vibrating membrane 1, which is arranged on the frame of the first box. Between the first pole plate 21 and the second pole plate 22; the first pole plate 21, the second pole plate 22 and the vibrating membrane 1 are arranged in parallel and spaced apart; the two pole plates are arranged in parallel with the vibrating membrane, and the pole plates It is energized to form a capacitive plate, and the vibrating membrane 1 is driven to work and produce sound through voltage changes. When used for medium and high frequency sound, the distance between the vibrating membrane 1 and the plate 2 is 1 to 2 mm.
  • the diaphragm 1 is made of various materials, such as paper, plastic, metal, synthetic fiber, etc.
  • the shape of the electrode plate can be square, rectangular, etc., and the material of the electrode plate can be metal conductors such as iron, magnesium alloy, die-cast aluminum, etc., through the electrode Plate voltage changes control the operation of the vibrating membrane;
  • the pole plate can also use electromagnetic materials, such as hard magnetic materials (such as barium ferrite), soft magnetic materials (such as electromagnetic pure iron, electrolytic iron and carbonyl iron), etc., controlled through the audio input system
  • the strength of the output current controls the strength of the magnetic field between the electromagnetic materials, thereby controlling the amplitude of the vibrating membrane, and ultimately the size of the sound.
  • the first end of the audio step-up transformer 3 is connected to the first plate 21, and the second end of the audio step-up transformer 3 is connected to the second plate 22;
  • the positive end of the high-voltage loading device 4 is connected to the diaphragm 1, and the negative end of the high-voltage loading device 4 is connected to the third end of the audio boost transformer 3; audio signal input system 5 ( (including power amplifier system and audio drive control), connected to the fourth terminal of the audio step-up transformer 3.
  • audio signal input system 5 (including power amplifier system and audio drive control), connected to the fourth terminal of the audio step-up transformer 3.
  • the audio input by the audio signal input system 5 uses the synergistic effect of the audio boost transformer 3 and the high-voltage loading device 4 to promote the accumulation of a certain density of charges on the surface of the vibrating membrane 1 (movable electrode).
  • the two conductive electrode plates 2 and the vibrating membrane 1 Forming a dual-capacitor structure: the audio alternating signal output by the audio signal input system is boosted 100 to 200 times by the audio boost transformer, and is input to the two plates 2, and is injected with 3KV to 5KV high-voltage static electricity by the high-voltage loading device 4
  • the diaphragm 1 will vibrate between the plates and produce sound.
  • the signal connection between the vibrating membrane, the plate, the audio boost transformer 3, the high-voltage loading device 4 and the audio signal input system 5 is realized through wires, which are routed in the gaps between the boxes and connected to the box or display unit The back.
  • each box 6 is in the shape of a rectangular parallelepiped, and each box 6 includes: two horizontally arranged borders and two vertically arranged borders.
  • the frame of the box becomes an electrode plate, so that the present invention can use existing materials to form a capacitor, and drive the vibrating membrane to work through the voltage on the capacitor plate.
  • the electrode plate can also use electromagnetic materials to control the operation of the vibrating membrane.
  • the shape of the vibrating membrane 1 is a straight rectangular plate, and the thickness of the vibrating membrane 1 is 2 to 12 ⁇ m, which is convenient for production and installation.
  • the sound system of the LED display screen is arranged vertically between adjacent boxes. In this way, the gap between the two adjacent boxes on the left and right can be fully utilized, increasing the sound propagation range and enhancing the sound localization effect.
  • the sound system of the LED display screen is arranged horizontally between adjacent boxes. In this way, the gap between the upper and lower adjacent cabinets can be fully utilized, increasing the sound propagation range and enhancing the sound localization effect.
  • the sound system of the LED display screen is installed in the horizontal and vertical gaps between adjacent boxes, which can more fully conduct the sound to the audience in front of the screen.
  • a sound-absorbing layer is installed on the wall behind the LED screen, and the sound-absorbing layer is covered with sound-absorbing materials. Eliminate noise and improve sound quality.
  • the first plate 21 is embedded in the frame of the first box, and the second plate 22 is embedded in the frame of the second box.
  • the surface of the frame of each LED box is covered with a sound shielding layer.
  • the sound shielding layer Bit The rest of the frame surface outside the first plate 21 or the second plate 22 is a shielding device that prevents sound resonance and crosstalk without affecting the conductive functions of the two plates.
  • the sound shielding layer can be 3mm thick and has a hardness of Made of 30D soft rubber.
  • the audio boost transformer realizes voltage boosting through equivalent circuit or electromagnetic control, boosting the voltage by 100-200 times to 100V ⁇ 1000V.
  • the high-voltage loading device 4 is a high-voltage polarized power supply.
  • the internal power supply can be implemented using PWM control technology and modular circuit design to generate 3KV ⁇ 5KV DC high voltage.
  • the number of the sound systems of the LED display screen is multiple. There is one sound system of the LED display screen between any two adjacent boxes. Each vibrating membrane 1 is set independently. Connect with other vibrating membranes, so that when the vibrating membrane is damaged, you only need to replace the damaged vibrating membrane, and other vibrating membranes will not be affected, which facilitates later maintenance.
  • An LED display screen is set between any two adjacent boxes. The sound system increases the sound transmission carrier, expands the sound transmission range, and improves the sound transmission quality.
  • the LED installation support such as a load-bearing wall
  • 4 horizontal boxes and 3 vertical boxes Each box is a square box, for example.
  • the sound system of the LED display screen is set between two adjacent boxes, three columns are set vertically, 3 in each column, a total of 9 sound systems of the LED display; two rows are set horizontally, 4 in each row , a total of 8 sound systems of the LED display screens, the sound systems of the LED display screens arranged horizontally and vertically, the structural size can be the same for easy installation and replacement, and the sound effects are the same.
  • the audio signal input system 5 drives the plate and diaphragm corresponding to the position of the box frame according to the spatial position of the audio: the audio signal is boosted 100 to 200 times by the audio boost transformer 3, and is input to the two poles.
  • the vibrating membrane 1 injected with 3KV to 5KV high-voltage static electricity by the high-voltage loading device 4 vibrates between the plates and emits sound. The sound waves are transmitted to the audience through the gaps between the boxes.
  • an audio step-up transformer 3 and a high-voltage loading device 4 can be used to control the operation of all vibrating membranes.
  • an audio step-up transformer 3 and a high-voltage loading device 4 can be used to control the operation of all vibrating membranes.
  • Each audio step-up transformer 3 and high-voltage loading device 4 respectively control the work of a corresponding vibrating membrane. If there are multiple vibrating membranes in the entire LED display screen, there will be the same number of vibrating membranes.
  • each LED display screen exists independently and is not affected by other surrounding sound systems.
  • the entire LED display screen can also be grouped, for example, every 6 LED displays
  • the units are in one group, and each group of LED display screens is assigned an audio boost transformer and a high-voltage loading device.
  • the audio boost transformer and high-voltage loading device in each group control the operation of the vibrating membrane in the group, so that multiple devices can be realized in one area, which is convenient. Production and installation can reduce space occupation and save costs. When a fault occurs, it can partially check and eliminate the fault, reducing the scope of the investigation.
  • the audio input system 5 in the figure includes a power amplifier system and an audio drive controller.
  • the power amplifier system drives the speaker to work.
  • the audio input system 5 shares an audio input system with the traditional audio system outside the LED display screen. 5. Connect to the traditional audio system and the sound system of the LED display through different connections. There is a sound system of the LED display screen between any two adjacent cabinets. When the number of LED cabinets is large, there will be a large number of LED display screen sound systems, and a large number of frame diaphragms in the LED cabinets. The audio system and the traditional audio system outside the LED screen together form a three-dimensional stereo audio system to meet the sound pressure requirements of large venues.
  • the invention makes full use of the limited space between the boxes to install the vibrating membrane to achieve a good sound effect without affecting the wiring of the luminous pixels. It has good sound pressure and has no impact on the display function.
  • LED display screens can adapt to the needs of LED movie screens, LED audio and video displays and other applications. There is a certain gap between LED boxes. For LED screens with non-minimum physical spacing, additional gaps can be left between boxes as needed. With the development of Mini LED and Micro LED technology, the size of LED lamp beads is developing towards miniaturization. It is expected that there will be more gaps between the boxes of LED products, and more gaps will be more conducive to the use of the present invention. practical application.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

本发明实施例提供一种LED显示屏的声音系统，包括设置在LED拼接屏相邻箱体边框间的第一极板、第二极板，振动膜设置平行且间隔第一极板和第二极板中间，两个极板和振动膜形成双电容结构，音频信号输入输入系统驱动电路、高压加载装置协同作用驱动振动膜发声，将音频及其位置信息(2D或3D音频)传递到LED显示屏前的观看位置，大量LED箱体内的框架振膜音频系统可使声音在画面上实现精准的定位，同时与LED屏外的传统音频系统共同组成三维立体音频，解决了LED显示屏无法打孔透声，影响音效的问题。

Description

一种LED显示屏的声音系统
本申请要求于2022年08月29日提交中国专利局、申请号为2022110419302，发明名称为“一种LED显示屏的声音系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及声音系统领域，具体涉及一种LED显示屏的声音系统。
背景技术
高端专业显示领域里，为了追求精确的画面内容和声音的位置相匹配，要求音箱安装在显示屏后方，声音透过显示屏传导给屏前的观众。将声音传导给屏前观众的传统方法是在幕布上规则布满大小统一的透声孔，这样可以最大限度地还原真实的声音位置。
在实现本发明过程中，申请人发现现有技术中存在如下问题：LED显示屏应用于显示领域时，由于LED显示屏的产品特性，无法在LED显示屏上打孔透声，无法透声，无法还原真实的声音位置，从而影响声音定位，影响音效。
发明内容
为解决LED显示屏无法透声，无法还原真实的声音位置，影响音效的问题，本发明提供一种LED显示屏的声音系统。
LED显示屏包括：多个箱体6组合形成的拼接屏，每个箱体6包括：边框、以及位于边框内的显示屏单元7，所述LED显示屏的声音系统设置在相邻两个箱体之间，所述LED显示屏的声音系统包括：
两个极板2；
两个所述极板2包括：第一极板21，设置在第一箱体的边框上，第二极板22，设置在第二箱体的边框上，振动膜1，设置在第一极板21和第二极板22中间，所述第一极板21、所述第二极板22和所述振动膜1平行并 间隔设置；
音频升压变压器3，音频升压变压器3的第一端连接到所述第一极板21，音频升压变压器3的第二端连接到所述第二极板22；
高压加载装置，高压加载装置输出正极端连接到振动膜1，高压加载装置4负极端连接到所述音频升压变压器3的第三端；音频信号输入系统5，连接到所述音频升压变压器3的第四端。
每个箱体6为长方体形状，每个箱体6包括：两个横向设置的边框和两个竖向设置的边框。
振动膜1的形状为平直的矩形平板状。
所述LED显示屏的声音系统竖向设置在相邻箱体之间。
所述LED显示屏的声音系统横向设置在相邻箱体之间。
LED屏后的墙面上设置吸声层。
LED箱体边框表面贴覆声音屏蔽层。
音频升压变压器通过等效电路或电磁控制实现升压。
高压加载装置为高压极化电源。
所述LED显示屏的声音系统的数目为多个，任意相邻两个箱体6之间设有一个所述LED显示屏的声音系统，每个振动膜1独立设置，不与其它振动膜连接。
本发明解决其问题的技术方案是：在由多个箱体组成的LED拼接屏中，相邻箱体的两个边框的极板作为电容器的两个极板，两个极板间隙中添加振动膜，在振动膜两边极板和振动膜上电压，组成一个利用加在电容器极板上的变化电压驱动振动膜工作的LED显示屏的声音系统。在每个箱体边框之间的所有间隙位置安装所述LED显示屏的声音系统，系统中相应的音频信号输入系统根据音频的空间位置，驱动对应箱体边框位置的LED显示屏的声音系统，将声波透过箱体间的空隙传递给受众，大量LED箱体内的LED显示屏的声音系统与LED屏外的传统音频系统共同组成三维立体音频 矩阵，达到了在高端专业LED领域里将音频及其位置信息(2D或3D音频)传递到LED显示屏前的观看位置，提高音效质量的效果。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例提供的一种LED显示屏的声音系统的极板和振动膜工作原理示意图；
图2是本发明实施例提供的一种LED显示屏的声音系统的结构示意图；
图3是本发明实施例提供的一种包含LED显示屏的声音系统的LED显示屏的正面结构示意图。
附图标记表示为：
1、振动膜；2、极板；21、第一极板；22、第二极板；3、音频升压变
压器；4、高压加载装置；5、音频信号输入系统；6、箱体；7、显示屏单元。
具体实施方式
下面结合具体的应用实例对照附图对本发明实施例上述技术方案进行详细说明，实施过程中没有介绍到的技术细节，可以参考前文的相关描述。
为解决LED显示屏无法透声，无法还原真实的声音位置，影响音效的问题本发明提供一种LED显示屏的声音系统。
如图3所示，LED显示屏包括：多个箱体6组合形成拼接屏，每个箱体6包括：边框、以及位于边框内的显示屏单元7，显示单元可独立成为一个小的显示屏，也可以多个显示屏单元拼接组成LED拼接屏，用户可根据 需要设置拼接屏大小，满足用户需求；
如图3所示，所述LED显示屏的声音系统设置在相邻两个箱体之间，相邻箱体之间存在间隙，在间隙中设置所述LED显示屏的声音系统，充分利用现有空间，声音传递效果更佳，同时节约成本，实现显示屏自发声的同时又不会损坏显示屏的显示功能；
如图1所示，所述LED显示屏的声音系统包括：
两个极板2，两个极板才能形成电容器，从而实现驱动所述LED显示屏的声音系统工作的目的；
如图1所示，所述极板2包括：第一极板21，设置在第一箱体的边框上，第二极板2，设置在第二箱体的边框上，振动膜1，设置在第一极板21和第二极板22中间；所述第一极板21、所述第二极板22和所述振动膜1平行并间隔设置；两极板与振动膜平行设置，极板通电形成电容板，通过电压变化驱动所述振动膜1工作发声，用做中高频发声时，振动膜1与极板2间距离1～2mm，全频振幅时，间距较大，一般间距3～5mm；振动膜1的材质多样，例如纸质、塑胶、金属、合成纤维等，极板形状可为正方形、长方形等，极板材质可为铁质、镁合金、压铸铝等金属导体，通过极板电压变化控制振动膜工作；极板还可使用电磁材料，如硬磁材料(例如钡铁氧体)、软磁材料(例如电磁纯铁、电解铁和羰基铁)等，通过音频输入系统控制输出电流的强弱，控制电磁材料间磁场强弱，进而控制振动膜的振幅大小，最终控制声音大小。
如图1所示，所述音频升压变压器3的第一端连接到所述第一极板21，所述音频升压变压器3的第二端连接到所述第二极板22；
如图1所示，所述高压加载装置4正极端连接到所述振动膜1，所述高压加载装置4负极端连接到所述音频升压变压器3的第三端；音频信号输入系统5(包含功放系统和音频驱动控制)，连接到所述音频升压变压器3的第四端。
音频信号输入系统5输入的音频，利用音频升压变压器3和高压加载装置4的协同作用，促使振动膜1(可动电极)表面积累一定密度的电荷，两个导电极板2和振动膜1形成双电容结构：由音频信号输入系统输出的音频交变信号经音频升压变压器升压100～200倍，输入到两个极板2上，被高压加载装置4注入了3KV～5KV高压静电的振动膜1在极板间就会产生振动，发出声音。振动膜、极板、音频升压变压器3、高压加载装置4和音频信号输入系统5之间的信号连接通过导线实现，导线在箱体之间的缝隙走线并连接到箱体或显示屏单元的背面。
如图3所示，每个箱体6为长方体形状，每个箱体6包括：两个横向设置的边框和两个竖向设置的边框。箱体的边框成为极板，使得本发明可利用现有材料形成电容，并通过电容板上的电压驱动振动膜工作，极板还可以采用电磁材料，控制振动膜工作。
振动膜1的形状为平直的矩形平板状，振动膜1的厚度为2～12μm，便于制作安装。
如图3所示，所述LED显示屏的声音系统竖向设置在相邻箱体之间。这样左右相邻两个箱体间的间隙可以得到充分利用，增加声音传播范围及增强声音定位效果。
如图3所示，所述LED显示屏的声音系统横向设置在相邻箱体之间。这样上下相邻两个箱体间的间隙可以得到充分利用，增加声音传播范围及增强声音定位效果。
相邻箱体的横向和竖向间隙都设置所述LED显示屏的声音系统，能够更充分的将声音传导到屏前的受众。
LED屏后的墙面上设置吸声层，吸声层布满吸声材料。排除杂音，提高音效质量。
第一极板21，镶嵌在第一箱体的边框上，第二极板22，镶嵌在第二箱体的边框上，每个LED箱体边框表面贴覆声音屏蔽层，所述声音屏蔽层位 于第一极板21或第二极板22之外的边框表面其余部分，防止声音共振、串扰的屏蔽器件，同时不影响两个极板的导电功能，声音屏蔽层可采用厚度3mm，硬度为30D的软橡胶制成。
音频升压变压器通过等效电路或电磁控制实现升压，升压100-200倍，升压到100V～1000V。
高压加载装置4即为高压极化电源，电源内部可采用PWM控制技术及模块化电路设计实现，产生3KV～5KV DC高压。
如图3所示，所述LED显示屏的声音系统的数目为多个，任意相邻两个箱体之间设有一个所述LED显示屏的声音系统，每个振动膜1独立设置，不与其它振动膜连接，这样出现振动膜破损时，只需将破损振动膜更换即可，其他振动膜不受影响，方便后期维护，任意相邻两个箱体之间设置一个所述LED显示屏的声音系统，增加声音传播载体，扩大声音传播范围，提高声音传播质量。
将如图3所示的4*3矩阵的LED显示拼接屏安装在LED安装支撑体，如承重墙上，横向4个箱体，竖向3个箱体，每个箱体例如为正方形箱体，LED显示屏的声音系统设置在相邻两个箱体之间，竖向设置三列，每列3个，一共9个所述LED显示屏的声音系统；横向设置两行，每行4个，共8个所述LED显示屏的声音系统，横向和竖向设置的LED显示屏的声音系统，结构大小可以相同，以便安装替换，并且声音效果相同。
在振动膜1两边箱体边框和振动膜上分别施加正负电压形成电容，组成一个利用加在电容器极板上的变化电压驱动振动膜工作的LED显示屏的声音系统。如图2所示，音频信号输入系统5根据音频的空间位置，驱动对应箱体边框位置的极板和振动膜：音频信号经音频升压变压器3升压100～200倍，输入到两个极板2上，被高压加载装置4注入了3KV～5KV高压静电的振动膜1在极板间产生振动，发出声音。将声波透过箱体间的空隙传递给受众。如图3所示，图中的音频升压变压器3和高压加载装置4，设置在 箱体后面，可以用一个音频升压变压器3和高压加载装置4控制所有振动膜工作，这样，实现一个带多个，便于制作安装和减少空间占用和成本；也可设计成一个振动膜只对应一个音频升压变压器3和高压加载装置4，每个音频升压变压器3和高压加载装置4分别控制对应的一个振动膜工作，整个LED显示屏，如果有多个振动膜，则有同样数量的音频升压变压器3和高压加载装置4，这样，每个LED显示屏的声音系统独立存在，不受周围其他声音系统的影响，还可以采用将整个LED显示屏分组，例如每6个LED显示屏单元为一组，每组LED显示屏分配一个音频升压变压器和一个高压加载装置，每组中的音频升压变压器和高压加载装置控制所在组内的振动膜工作，这样可以实现一带多，便于制作安装、减少空间占用、节约成本，在出现故障时，又能局部检查排除故障，减小排查范围。如图3所示，图中的音频输入系统5包括功放系统和音频驱动控制器，由功放系统带动音箱工作，所述音频输入系统5和LED显示屏外的传统音频系统共用一套音频输入系统5，通过不同连线，连接到传统音频系统和LED显示屏的声音系统。任意相邻两个箱体之间都设有一个所述LED显示屏的声音系统，当LED箱体量大时，就会有大量的LED显示屏的声音系统，大量LED箱体内的框架振膜音频系统与LED屏外的传统音频系统共同组成三维立体音频，满足大型场馆对声压的要求。本发明充分利用箱体间有限的空间来设置振动膜，达到良好的发声效果，且不影响发光像素的布线，具有良好声压的同时，又对显示功能无影响，采用该发明技术制作的大型LED显示屏可适应LED电影屏，LED音视频显示屏等应用的需求。LED的箱体之间都存在一定的间隙，对于非最小极限物理间距的LED屏，在箱体之间还可以根据需要留出额外的间隙。随着Mini LED和Micro LED技术的发展，LED灯珠的尺寸向小型化发展，预计LED产品的箱体之间将会有更多的间隙可以利用，更多的间隙将更有利于本发明的实际应用。

Claims (10)

  1. 一种LED显示屏的声音系统，其特征在于，LED显示屏包括：多个箱体(6)组合形成的拼接屏，每个箱体(6)包括：边框、以及位于边框内的显示屏单元(7)，所述LED显示屏的声音系统设置在相邻两个箱体之间，所述LED显示屏的声音系统包括：
    两个极板(2)；
    两个所述极板(2)包括：第一极板(21)，设置在第一箱体的边框上，第二极板(22)，设置在第二箱体的边框上，振动膜(1)，设置在第一极板(21)和第二极板(22)中间；所述第一极板(21)、所述第二极板(22)和所述振动膜(1)平行并间隔设置；
    音频升压变压器(3)，所述音频升压变压器(3)的第一端连接到所述第一极板(21)，所述音频升压变压器(3)的第二端连接到所述第二极板(22)；
    高压加载装置，所述高压加载装置正极端连接到所述振动膜(1)，所述高压加载装置(4)负极端连接到所述音频升压变压器(3)的第三端；音频信号输入系统(5)，连接到所述音频升压变压器(3)的第四端。
  2. 如权利要求1所述的LED显示屏的声音系统，其特征在于，每个箱体(6)为长方体形状，每个箱体(6)包括：两个横向设置的边框和两个竖向设置的边框。
  3. 如权利要求1所述的LED显示屏的声音系统，其特征在于，振动膜(1)的形状为平直的矩形平板状。
  4. 如权利要求1所述的LED显示屏的声音系统，其特征在于，所述LED显示屏的声音系统竖向设置在相邻箱体之间。
  5. 如权利要求1所述的LED显示屏的声音系统，其特征在于，所述LED显示屏的声音系统横向设置在相邻箱体之间。
  6. 如权利要求1所述的LED显示屏的声音系统，其特征在于，LED屏 后的支撑墙面上设置吸声层。
  7. 如权利要求1所述的LED显示屏的声音系统，其特征在于，第一极板(21)，镶嵌在第一箱体的边框上，第二极板(22)，镶嵌在第二箱体的边框上，每个LED箱体边框表面贴覆声音屏蔽层，所述声音屏蔽层位于第一极板(21)或第二极板(22)之外。
  8. 如权利要求1所述的LED显示屏的声音系统，其特征在于，音频升压变压器(3)通过等效电路或电磁控制实现升压。
  9. 如权利要求1所述的LED显示屏的声音系统，其特征在于，高压加载装置(4)为高压极化电源。
  10. 如权利要求1所述的LED显示屏的声音系统，其特征在于，所述LED显示屏的声音系统的数目为多个，任意相邻两个箱体(6)之间设有一个所述LED显示屏的声音系统，每个所述振动膜(1)独立设置，不与其它振动膜连接。
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