Patent Description:
Light-emitting diode (LED) display devices are electronic display screens composed of LED dot matrices. The forms of display contents on the screen, for example, texts, animations, pictures and videos are timely switched by turning on and off red and green lamp beads, and the display control of assemblies is implemented by means of modular structures. The LED display device includes an LED display screen, a control system and a power source system. The LED display screens are composed of LED dot matrices to emit light. The control system switches the display contents on the screens by adjusting and controlling the on/off state of areas. The power source system is used to convert input voltages and currents to satisfy the requirements of the display screen. The LED display screen can switch different forms of various information presentation modes, and can be used indoors and outdoors, with incomparable advantages over other display screens. Featuring high brightness intensity, low power consumption, low voltage requirement, small size, convenient use, long service life, stable impact resistance, and strong resistance to external interference, the LED display screen develops rapidly and has been widely applied in various fields.

The LED display devices in the related art are all formed by splicing LED display screens. Since stress deformation will be resulted from the gravity and long-term use, the gravity of the upper-layer LED display screens acts on the lower-layer LED display screens to press the lower-layer LED display screens. In this case, when the lower-layer LED display screens are required to be repaired and replaced, it will be difficult to take out the lower-layer LED display screens under pressure from the gravity.

In the prior art, when the LED display screens are in the front-maintained mode, if a certain lower-layer LED display screen is required to be repaired and replaced, all the upper-layer LED display screens above the LED display screen are required to be detached, resulting in difficult repair.

Examples of a stand apparatus according to the prior art are known from <CIT>. And examples of a Rapid splicing display method for LED screens with different dot spacings and different dot matrixes according to the prior art are known from <CIT>. And a Knockdown screen according to the prior art is known from <CIT>.

The main objective of the disclosure is to provide a light-emitting diode (LED) display device, so as to solve the problem that in the prior art, when a certain LED display screen at a lower layer is required to be repaired and replaced, all upper-layer LED display screens above the LED display screen are required to be detached, resulting in difficult repair.

In order to realize the above objective, the disclosure provides an LED display device. The LED display device includes: a support; a plurality of display assemblies mounted on a front side of the support, wherein the plurality of display assemblies are arranged in an array on the support, each display assembly is slidably arranged in an upper-lower direction, and each display assembly includes a frame and an LED display screen detachably arranged on a front side of the frame; and a plurality of gas bags, wherein each gas bag is arranged between the frames of two display assemblies adjacent to each other in the upper-lower direction, each gas bag has an expanded state and a flat state, when the gas bag is in the flat state, two adjacent display assemblies located above and below the gas bag cooperate with each other in a contact manner, and when the gas bag is switched from the flat state to the expanded state, the frame above the gas bag may be driven to slide upwards, such that a detachment gap is formed between the two adjacent display assemblies located above and below the gas bag.

In some embodiments, each gas bag includes a flat gas bag body and a gas nozzle arranged on the gas bag body, first accommodation recesses for accommodating the gas bag body are provided on the frames of the two adjacent display assemblies located above and below, and the gas nozzle passes through the frames.

In some embodiments, the LED display device further includes a gas source device for supplying gas to the plurality of gas bags, the gas source device includes a gas pump and/or an inflator, the gas source device further includes a plurality of first gas channels in communication with the gas pump and/or the inflator, the plurality of first gas channels are connected in parallel, the plurality of first gas channels are in communication with the plurality of gas bags in a one-to-one correspondence manner, and a first gate valve is arranged on each of the first gas channels.

In some embodiments, the gas source device further includes an overflow gas channel in communication with any one of the first gas channels, and an overflow valve is arranged on the overflow gas channel.

In some embodiments, the gas source device includes the gas pump and the inflator, the gas pump and the inflator are connected in parallel, the plurality of first gas channels converge at a junction, the junction is in communication with the gas pump by a second gas channel, a first one-way valve is arranged on the second gas channel, a third gas channel is arranged between an inlet of the first one-way valve and the inflator, a second one-way valve is arranged on the third gas channel, a fourth gas channel is arranged between the junction and an outlet of the first one-way valve, and a second gate valve is arranged on the fourth gas channel.

In some embodiments, the LED display device further includes a plurality of vertical rods arranged at intervals and a plurality of horizontal rods arranged at intervals, the vertical rods and the horizontal rods are arranged in a staggered manner, every two adjacent vertical rods pass through one frame, every two adjacent horizontal rods pass through one frame, and a movement gap in the upper-lower direction is formed between a through hole of each frame allowing the horizontal rods to pass through and a corresponding horizontal rods.

In some embodiments, a chute is provided on one frame of two adjacent frames located left and right, and a slide block matching the chute in an inserted manner is arranged on the other frame.

In some embodiments, a second accommodation recess for accommodating a ball is provided on a back side of each frame, and a portion of the ball protruding out of an opening of the second accommodation recess cooperates with a surface of the support in a contact manner.

In some embodiments, a pair of limiting members located on an upper side and a lower side of the ball is arranged on the frame, and the limiting members are detachably located in the second accommodation recess.

In some embodiments, the LED display device further includes a plurality of fasteners penetrating through the support, one corresponding frame is adjustably mounted on the support by each fastener, an avoiding hole allowing the fasteners to pass through are provided on the support, an aperture of the avoiding hole is greater than an outer diameter of each fastener, connecting holes tightly connected to the fasteners are provided on the frames, the LED display device further includes a plurality of damping members, the plurality of damping members and the plurality of fasteners are arranged in a one-to-one correspondence manner, and the damping members are located between the avoiding holes and heads of the fasteners, such that the fasteners may swing up and down in the avoiding holes when the frames slide up and down.

In some embodiments, the fasteners include screw heads and screw rods connected with the screw heads, the connecting holes are screw holes connected with the screw rods, the avoiding holes include elongated hole sections for avoiding the screw rods, and reamed hole sections for accommodating the screw heads, each reamed hole section has an aperture greater than a maximum value of apertures of the elongated hole sections, step surfaces are formed between the reamed hole sections and the elongated hole sections, the damping members include springs sleeving the screw rods, and the springs are located between the screw heads and the step surfaces.

By employing the technical solution of the disclosure, the LED display device includes: a support, a plurality of display assemblies and a plurality of gas bags. The plurality of display assemblies are mounted on a front side of the support. The plurality of display assemblies are arranged in an array on the support. Each display assembly is slidably arranged in an upper-lower direction. Each display assembly includes a frame and an LED display screen detachably arranged on a front side of the frame. Each gas bag is arranged between the frames of two display assemblies adjacent to each other in the upper-lower direction, and each gas bag has an expanded state and a flat state. In the disclosure, when the gas bag is in the flat state, two adjacent display assemblies located above and below the gas bag cooperate with each other in a contact manner. When a lower LED display screen is required to be replaced, the gas bag above the LED display screen required to be repaired is switched from the flat state to the expanded state, and the frame above the gas bag may be driven to slide upwards, such that a detachment gap is formed between the two adjacent display assemblies located above and below the gas bag. In this way, the LED display screen above the lower LED display screen required to be repaired is slightly lifted, such that the LED display screen required to be maintained is not pressed by the upper LED display screen, the lower LED display screen required to be maintained may be easily taken down from the corresponding frame and taken out from the plurality of display assemblies. Therefore, the LED display screen required to be maintained is easy to repair. Furthermore, in the situation that a plurality of LED display screens are arranged above an LED display screen required to be maintained, the lower LED display screen to be maintained may be easily replaced and repaired, and front maintenance is convenient. Therefore, the technical solution of the disclosure may solve the problem that in the prior art, when a certain LED display screen at a lower layer is required to be repaired and replaced, all upper-layer LED display screens above the LED display screen are required to be detached, resulting in difficult repair.

The accompanying drawings of the description, which constitutes a part of the disclosure, are used to provide further understanding of the disclosure, and illustrative embodiments of the disclosure and the description thereof are used to explain the disclosure, which are not intended to unduly limit the disclosure. In the accompanying drawings:.

The above accompanying drawings include the following reference numerals:
<NUM>: support; <NUM>: avoiding hole; <NUM>: elongated hole section; <NUM>: reamed hole section; <NUM>: display assembly; <NUM>: frame; <NUM>: first accommodation recess; <NUM>: second accommodation recess; <NUM>: connecting hole; <NUM>: LED display screen; <NUM>: gas bag; <NUM>: gas bag body; <NUM>: gas nozzle; <NUM>: gas source device; <NUM>: gas pump; <NUM>: inflator; <NUM>: first gas channel; <NUM>: second gas channel; <NUM>: third gas channel; <NUM>: fourth gas channel; <NUM>: first gate valve; <NUM>: overflow valve; <NUM>: first one-way valve; <NUM>: second one-way valve; <NUM>: second gate valve; <NUM>: vertical rod; <NUM>: horizontal rod; <NUM>: chute; <NUM>: slide block; <NUM>: ball; <NUM>: limiting member; <NUM>: fastener; <NUM>: screw head; <NUM>: screw rod; <NUM>: damping member; <NUM>: washer; <NUM>: mounting box; <NUM>: gas inlet; <NUM>: gas outlet; <NUM>: inflating port; and <NUM>: gas pump switch.

The technical solutions of the embodiments of the disclosure will be clearly and completely described below in combination with the accompanying drawings in the embodiments of the disclosure. Apparently, the described embodiments are merely part rather than all of the embodiments of the disclosure. The following description of at least one illustrative embodiment is merely illustrative in nature and in no way serves as any limitation of the disclosure and application or uses thereof. On the basis of the embodiments of the disclosure, all other embodiments obtained by those of ordinary skill in the art without making inventive efforts all fall within the protection scope of the disclosure.

It should be noted that the terms used herein are merely for describing the specific implementations and are not intended to limit the illustrative implementations according to the disclosure. As used herein, a singular form is intended to include a plural form as well, unless the context clearly dictates otherwise, and in addition, it should be understood that the terms "contain" and/or "include", when used in the description, specify the presence of features, steps, operations, devices, assemblies, and/or combinations thereof.

Unless specifically stated otherwise, relative arrangements, numerical expressions and values of the assemblies and steps stated in these embodiments do not limit the scope of the disclosure. Moreover, it should be understood that the sizes of the various parts shown in the accompanying drawings are not drawn according to an actual scale for ease of description. Technique, methods and devices known to those of ordinary skill in the related art may not be discussed in detail, but should be considered as a part of the authorized description where appropriate. In all examples shown and discussed herein, any specific value should be interpreted as merely illustrative and not as limiting. Thus, other examples of the illustrative embodiments can have different values. It should be noted that similar numerals and letters denote similar items in the following accompanying drawings, and therefore, once a certain item is defined in one figure, it is not required to be further discussed in the subsequent figures.

As shown in <FIG>, a light-emitting diode (LED) display device in the embodiment includes: a support <NUM>, a plurality of display assemblies <NUM> and a plurality of gas bags <NUM>. The plurality of display assemblies <NUM> are mounted on a front side of the support <NUM>. The plurality of display assemblies <NUM> are arranged in an array on the support <NUM>. Each display assembly <NUM> is slidably arranged in an upper-lower direction. Each display assembly <NUM> includes a frame <NUM> and an LED display screen <NUM> detachably arranged on a front side of the frame <NUM>. Each gas bag <NUM> is arranged between the frames <NUM> of two display assemblies <NUM> adjacent to each other in the upper-lower direction, and each gas <NUM> bag has an expanded state and a flat state. In the embodiment, when the gas bag <NUM> is in the flat state, two adjacent display assemblies <NUM> located above and below the gas bag <NUM> cooperate with each other in a contact manner, and when the gas bag <NUM> is switched from the flat state to the expanded state, the frame <NUM> above the gas bag <NUM> may be driven to slide upwards, such that a detachment gap is formed between the two adjacent display assemblies <NUM> located above and below the gas bag <NUM>.

By applying the technical solution of the embodiment, when the gas bag <NUM> is in the flat state, the two adjacent display assemblies <NUM> located above and below the gas bag <NUM> cooperate with each other in a contact manner. When a lower LED display screen <NUM> is required to be replaced, the gas bag <NUM> above the LED display screen <NUM> required to be repaired is switched from the flat state to the expanded state, and the frame <NUM> above the gas bag <NUM> may be driven to slide upwards, such that a detachment gap is formed between the two adjacent display assemblies <NUM> located above and below the gas bag <NUM>. In this way, the LED display screen <NUM> above the lower LED display screen <NUM> required to be repaired is slightly lifted, such that the LED display screen <NUM> required to be maintained is not pressed by the upper LED display screen, the lower LED display screen <NUM> required to be maintained may be easily taken down from the corresponding frame <NUM> and taken out from the plurality of display assemblies <NUM>. Therefore, the LED display screen <NUM> required to be maintained is easy to repair. Further, in the situation that a plurality of LED display screens <NUM> are arranged above an LED display screen <NUM> required to be maintained, the lower LED display screen <NUM> required to be maintained may be easily replaced and repaired, an enough repair space for operation of engineering personnel is not required to be reserved at a back portion of the LED display device, and front maintenance is convenient. Moreover, repair cost may be reduced, repair efficiency may be improved, and the purpose of independently repairing a broken LED display screen <NUM> may be realized. Therefore, the technical solution of the embodiment may solve the problem that in the prior art, when a certain LED display screen at a lower layer is required to be repaired and replaced, all upper-layer LED display screens above the LED display screen are required to be detached, resulting in difficult repair.

It should be noted that the above expanded state corresponds to a state of the gas bag <NUM> that is inflated, and the above flat state corresponds to a state of the gas bag <NUM> that is deflated or gasless.

As shown in <FIG>, <FIG> and <FIG>, each gas bag <NUM> includes a flat gas bag body <NUM> and a gas nozzle <NUM> arranged on the gas bag body <NUM>. When the gas bag <NUM> is in the expanded state, the flat gas bag body <NUM> is attached to an upper surface and a lower surface of corresponding adjacent frames <NUM> located above and below, such that the gas bag <NUM> may stably lift the upper frame <NUM> and prevent the frame <NUM> from falling. Moreover, compared with a spherical or elliptical gas bag, the flat gas bag body <NUM> is narrower and longer, and occupies less space. When the gas bag <NUM> is in the flat state, in order to prevent the frames <NUM> of the two adjacent display assemblies <NUM> located above and below from pressing the gas bag <NUM> to damage the gas bag <NUM>, first accommodation recesses <NUM> for accommodating the gas bag body <NUM> are provided on the frames <NUM> of the two adjacent display assemblies <NUM> located above and below, and the gas nozzle <NUM> passes through the frames <NUM>.

As shown in <FIG>, the LED display device further includes a gas source device <NUM> for supplying gas to the plurality of gas bags <NUM>. The gas source device <NUM> includes a gas pump <NUM> and an inflator <NUM>, the gas source device <NUM> further includes a plurality of first gas channels <NUM> in communication with the gas pump <NUM> and the inflator <NUM>, the plurality of first gas channels <NUM> are connected in parallel, the plurality of first gas channels <NUM> are in communication with the plurality of gas bags <NUM> in a one-to-one correspondence manner, and a first gate valve <NUM> is arranged on each of the first gas channels <NUM>. The gas pump <NUM> inflates the plurality of gas bags <NUM> by the plurality of first gas channels <NUM>, the plurality of gas bags and the plurality of first gas channels being arranged in a one-to-one correspondence manner. Each first gate valve <NUM> may connect or disconnect a corresponding first gas channel <NUM>. For a lower LED display screen <NUM> required to be maintained, the gas bag <NUM> above the frame <NUM> corresponding to the LED display screen <NUM> is required to be inflated, and at this time, all the other first gate valves <NUM> may be closed, and only the first gate valve <NUM> of the gas bag <NUM> corresponding to the LED display screen <NUM> required to be maintained is opened. If there is no power source for supplying power to the gas pump <NUM> due to environmental restrictions, inflation may be manually carried out by the inflator <NUM> without affecting repair. The first gate valve <NUM> may be a manual valve or an electric valve. The first gate valve <NUM> is preferably a ball valve. The gas source device <NUM> in the embodiment uses air as a conductive medium, which is environment-friendly and pollution-free. The LED display device in the embodiment uses pneumatic transmission, which effectively reduces the number of mechanisms and parts for mechanical transmission, and may reduce cost.

Certainly, in embodiments not shown in the figures, the gas source device may only include a gas pump, and the gas source device further include a plurality of first gas channels in communication with the gas pump. The gas source device may only include an inflator, and the gas source device further include a plurality of first gas channels in communication with the inflator.

As shown in <FIG>, the gas source device <NUM> further includes an overflow gas channel in communication with any one of the first gas channels <NUM>, and an overflow valve <NUM> is arranged on the overflow gas channel. Through the arrangement of the overflow valve <NUM>, a preset constant gas pressure is provided to the gas source device <NUM>, so as to guarantee that the pressure is in a safe range, and guarantee safety of the gas pump, each first gas channel <NUM> and each gas bag <NUM>.

As shown in <FIG>, the gas source device <NUM> includes a gas pump <NUM> and an inflator <NUM>. The gas pump <NUM> and the inflator <NUM> are connected in parallel, the plurality of first gas channels <NUM> converge at a junction, the junction is in communication with the gas pump <NUM> by a second gas channel <NUM>, and a first one-way valve <NUM> is arranged on the second gas channel <NUM>. Through the arrangement of the first one-way valve <NUM>, gas in the second gas channel <NUM> is prevented from flowing back. A third gas channel <NUM> is arranged between an inlet of the first one-way valve <NUM> and the inflator <NUM>, and a second one-way valve <NUM> is arranged on the third gas channel <NUM>. Through the arrangement of the second one-way valve <NUM>, gas in the third gas channel <NUM> is prevented from flowing back. A fourth gas channel <NUM> is arranged between the junction and an outlet of the first one-way valve <NUM>, and a second gate valve <NUM> is arranged on the fourth gas channel <NUM>. Through the arrangement of the second gate valve <NUM>, gas in the second gas channel <NUM> and the first gas channel <NUM> may be conveniently discharged after the LED display device is front-maintained. The second gate valve <NUM> may be a manual valve or an electric valve. The second gate valve <NUM> is preferably a ball valve.

As shown in <FIG>, the gas source device <NUM> in the embodiment further includes a mounting box <NUM> located below the support <NUM>, the above overflow gas channel, overflow valve <NUM>, second gas channel <NUM>, first one-way valve <NUM>, fourth gas channel <NUM>, and second one-way valve <NUM> are all mounted in the mounting box <NUM>. A gas inlet <NUM>, a gas outlet <NUM>, an inflating port <NUM> and a gas pump switch <NUM> are provided on the mounting box <NUM> at intervals. The second gas channel <NUM> is in communication with the gas inlet <NUM>, the fourth gas channel <NUM> is in communication with the gas outlet <NUM>, and the third gas channel <NUM> is in communication with the inflating port <NUM>. The gas pump <NUM> is located outside the mounting box <NUM>, and the gas pump <NUM> is connected to the gas pump switch <NUM>. Through the arrangement of the mounting box <NUM>, the gas source device <NUM> is more compact in structure, and convenient to carry and operate. The second gate valve <NUM> and the plurality of first gate valves <NUM> are mounted on the mounting box <NUM> at intervals, the second gate valve <NUM> is normally in a closed state, and the plurality of first gate valves <NUM> are normally in a closed state.

It should be noted that three "▪" between two first gate valves <NUM> in <FIG> are ellipses, indicating that several first gate valves <NUM> are omitted. Three "▪" between two gas bags <NUM> in <FIG> are ellipses, indicating that several gas bags <NUM> are omitted.

As shown in <FIG>, the LED display device further includes a plurality of vertical rods <NUM> arranged at intervals and a plurality of horizontal rods <NUM> arranged at intervals. The vertical rods <NUM> and the horizontal rods <NUM> are arranged in a staggered manner, there is a distance between the vertical rods <NUM> and the horizontal rods <NUM> in a front-back direction of support <NUM>, every two adjacent vertical rods <NUM> pass through one frame <NUM>, and every two adjacent horizontal rods <NUM> pass through one frame <NUM>. In this way, a plurality of display assemblies <NUM> are assembled together by the plurality of vertical rods <NUM> and the plurality of horizontal rods <NUM> that are arranged in a staggered manner. A movement gap in the upper-lower direction is provided between through holes of each frame <NUM> allowing the horizontal rods <NUM> to pass through and the corresponding horizontal rods <NUM>. Each vertical rod <NUM> pass through a plurality of display assemblies <NUM> arranged in a row in an up-down direction of support <NUM>, and each horizontal rod <NUM> pass through a plurality of display assemblies <NUM> arranged in a row in a left-right direction of support <NUM>. Each through hole of each frame <NUM> allowing the horizontal rod <NUM> to pass through may be a round hole or an elliptical hole having an aperture greater than an outer diameter of the horizontal rod <NUM>, or may be an elongated hole having a minimum aperture greater than an outer diameter of the horizontal rod <NUM>. The above movement gap has a diameter of <NUM> - <NUM>.

As shown in <FIG>, first external threads are provided on portions of two ends of each vertical rod <NUM> protruding out of an upper surface and a lower surface of each of the plurality of LED display assemblies respectively, and the LED display device further includes first nuts connected to the first external threads. Second external threads are provided on portions of two ends of each horizontal rod <NUM> protruding out of a left surface and a right surface of each of the plurality of LED display assemblies respectively, and the LED display device further includes second nuts connected to the second external threads. When a lower LED display screen <NUM> is required to be repaired and replaced, the first nuts on the vertical rods <NUM> on two sides of a row where the LED display screen <NUM> required to be repaired is located is required to be unscrewed first, such that each frame <NUM> of the row where the LED display screen <NUM> required to be repaired is located may be loosened, and when the gas bag <NUM> above the LED display screen <NUM> required to be repaired is switched from the flat state to the expanded state, the frame <NUM> above the gas bag <NUM> may be driven to slide upwards.

As shown in <FIG>, <FIG>, <FIG> and <FIG>, a chute <NUM> is provided on one frame <NUM> of two adjacent frames <NUM> located left and right, and a slide block <NUM> matching the chute <NUM> in an inserted manner is arranged on the other frame <NUM> of two adjacent frames <NUM>. In this way, through matching between the chute <NUM> and the slide block <NUM>, one frame <NUM> of two adjacent frames <NUM> located left and right may slide upwards relative to the other frame <NUM>. Preferably, one chute <NUM> and one slide block <NUM> are arranged on a left side and a right side of one frame <NUM> for the convenience of processing and forming. In this way, the LED display device is simple in structure, and easy to mount and operate.

As shown in <FIG> and <FIG>, a second accommodation recess <NUM> for accommodating a ball <NUM> is provided on a back side of each frame <NUM>, and a portion of each ball <NUM> protruding out of an opening of the second accommodation recess <NUM> matches a surface of the support <NUM> in a contact manner. Since contact between the ball <NUM> and the surface of the support <NUM> is point-to-surface contact, a friction coefficient is small. When a gas bag <NUM> above a LED display screen <NUM> required to be repaired is switched from the flat state to the expanded state, only a small support force is required to be provided by the gas bag <NUM> to lift the frame <NUM> above the gas bag <NUM>, such that all the frames <NUM> above the gas bag <NUM> may slide upwards, which is easy and labor-saving. It should be noted that more than half of the ball <NUM> is located in the second accommodation recess <NUM>, so as to prevent the ball <NUM> from being separated from the second accommodation recess <NUM> from a back side of the corresponding frame <NUM>.

As shown in <FIG> and <FIG>, a pair of limiting members <NUM> located on an upper side and a lower side of the ball <NUM> is arranged on each frame <NUM>, and the limiting members <NUM> are detachably located in the second accommodation recess <NUM>. The pair of limiting members <NUM> limit the upper side and the lower side of the ball <NUM> respectively, and the ball <NUM> is only allowed to roll in the second accommodation recess <NUM>, such that when the frame <NUM> slides upwards or downwards, the ball <NUM> is prevented from moving upwards or downwards, and a working position of the ball <NUM> in the second accommodation recess <NUM> is prevented from changing. Specifically, there are two balls <NUM> arranged in the second accommodation recess <NUM> at an interval in the upper-lower direction on each frame <NUM>. In this way, the frame <NUM> may stably slide upwards conveniently. The limiting members <NUM> in the embodiment are preferably bolts, and heads of the bolts are located in the second accommodation recesses <NUM>, so as to prevent the situation that the heads of the bolts are in contact with the surface of the support <NUM>, so as to interfere with the surface of the support.

Specifically, as shown in <FIG> and <FIG>, each frame <NUM> includes a top beam and a bottom beam that may be oppositely spliced, and a first side beam and a second side beam that may be spliced between the top beam and the bottom beam, the top beam, the bottom beam, the first side beam and the second side beam defining a rectangular structure. The chutes <NUM> and the slide blocks <NUM> are arranged on the first side beams and the second side beams, and the chutes <NUM> on the first side beams are located outside the frames <NUM>, and the slide blocks <NUM> on the second side beams are located outside the frames <NUM>. Second accommodation recesses <NUM> are provided on the first side beams and the second side beams, and in order to conveniently mount the balls <NUM> in the second accommodation recesses <NUM>, two ends of the second accommodation recess <NUM> on each first side beam extend to an upper surface and a lower surface of the first side beam respectively, and two ends of the second accommodation recess <NUM> on each second side beam extend to an upper surface and a lower surface of the second side beam respectively.

As shown in <FIG>, the LED display device further includes a plurality of fasteners <NUM> penetrating the support <NUM>. One corresponding frame <NUM> is adjustably mounted on the support <NUM> by each fastener <NUM>. In order to create a movement space for the fastener <NUM> in an upper-lower direction, avoiding holes <NUM> allowing the fasteners <NUM> to pass through are provided on the support <NUM>, and each avoiding hole <NUM> has an aperture greater than an outer diameter of each fastener <NUM>. Through the provision of the avoiding holes <NUM>, the fasteners <NUM> may slide up and down with the frames <NUM> when the frames <NUM> slide up and down. Connecting holes <NUM> tightly connected to the fasteners <NUM> are provided on the frames <NUM>, and the LED display device further includes a plurality of damping members <NUM>, the damping members <NUM> and the fasteners <NUM> are arranged in a one-to-one correspondence manner, and the damping members <NUM> are located between the avoiding holes <NUM> and heads of the fasteners <NUM>, such that the fasteners <NUM> may swing up and down in the avoiding holes <NUM> when the frames <NUM> slide up and down. Through the arrangement of the damping members <NUM>, the heads of the fasteners <NUM> may be conveniently pressed on the support <NUM>, such that the fasteners <NUM> are tightly connected in the connecting holes <NUM>, and the frames <NUM> are adjustably fixed on the support <NUM>.

As shown in <FIG> and <FIG>, the fasteners <NUM> include screw heads <NUM> and screw rods <NUM> connected to the screw heads <NUM>. The connecting holes <NUM> are screw holes connected to the screw rods <NUM>, the avoiding holes <NUM> include elongated hole sections <NUM> for avoiding the screw rods <NUM> and reamed hole sections <NUM> for accommodating the screw heads <NUM>, and each reamed hole section <NUM> has an aperture greater than a maximum value of apertures of the elongated hole sections <NUM>. Through the arrangement of the elongated hole sections <NUM>, the avoiding holes <NUM> may conveniently avoid the screw rods <NUM>, such that the screw rods <NUM> may swing up and down in the avoiding holes <NUM> when the frames <NUM> slide up and down. Step surfaces are formed between the reamed hole sections <NUM> and the elongated hole sections <NUM>, the damping members <NUM> include springs sleeving the screw rods <NUM>, and the springs are located between the screw heads <NUM> and the step surfaces. The screw heads <NUM> and the step surfaces limit the springs, such that the springs may always apply elastic forces to the fasteners <NUM>. With the elastic forces of the springs, the gaps between the balls <NUM> and the support <NUM> may be eliminated, such that the balls <NUM> are tightly pressed on the surface of the support <NUM> in a front-back direction of the support <NUM>. In this way, in the situation that the frames <NUM> are fixed on the support <NUM> by the fasteners <NUM>, when the gas bag <NUM> above the LED display screen <NUM> required to be repaired is switched from the flat state to the expanded state, the gas bag <NUM> may also lift the frame <NUM> above the gas bag <NUM>, such that all the frames <NUM> above the gas bag <NUM> may slide upwards.

As shown in <FIG> and <FIG>, in the embodiment, the LED display device further includes washers <NUM> sleeving the fasteners <NUM>, and the washers <NUM> are located between the screw heads <NUM> and the springs. In this way, through the arrangement of the washers <NUM>, pressing forces applied to the springs by the fasteners <NUM> may be increased, such t-ZQShat adjustable fixation by the fasteners <NUM> is more reliable.

In the description of the disclosure, it should be understood that orientation or positional relations indicated by orientation words such as "front, back, upper, lower, left and right", "horizontal, vertical, perpendicular to and parallel with", and "top and bottom" are generally based on orientation or positional relations shown in the accompanying drawings, and are merely for the convenience of describing the disclosure and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that devices or elements indicated thereby must have specific orientations or be constructed and operated in specific orientations, and therefore cannot be construed as limiting the protection scope of the disclosure. Orientation words "inside and outside" refer to an inside and an outside relative to an outline of each component.

For ease of description, spatial relative terms such as "on", "above", "on an upper surface" and "upper" can be used herein to describe spatial positional relations of one device or feature with other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientations of the devices described in the figures. For example, if the device in the figures is inverted, the device described as "above" or "on" other devices or structures would then be positioned "below" or "under" the other devices or structures. Thus, the illustrative term "above" can include two orientations of "above" and "below. " The device can also be positioned in other different ways (being rotated by <NUM> degrees or being positioned at other orientations), and the spatial relative description used herein is interpreted accordingly.

Claim 1:
A light-emitting diode (LED) display device, comprising:
a support (<NUM>);
a plurality of display assemblies (<NUM>) mounted on a front side of the support (<NUM>), wherein the plurality of display assemblies (<NUM>) are arranged in an array on the support (<NUM>), each of the plurality of display assemblies (<NUM>) is slidably arranged in an upper-lower direction, and each of the plurality of display assemblies (<NUM>) comprises a frame (<NUM>) and an LED display screen (<NUM>) detachably arranged on a front side of the frame (<NUM>);
characterized in that, the LED display device further comprises a plurality of gas bags (<NUM>), wherein each of the plurality of gas bags (<NUM>) is arranged between the frames (<NUM>) of two display assemblies (<NUM>) adjacent to each other in the upper-lower direction, each of the plurality of gas bags (<NUM>) has an expanded state and a flat state,
when the gas bag (<NUM>) is in the flat state, two adjacent display assemblies (<NUM>) located above and below one of the plurality of gas bags (<NUM>) cooperate with each other in a contact manner, and when the one of the plurality of gas bags (<NUM>) is switched from the flat state to the expanded state, the frame (<NUM>) above the one of the plurality of gas bags (<NUM>) can be driven to slide upwards, such that a detachment gap is formed between the two adjacent display assemblies (<NUM>) located above and below the one of the plurality of gas bags (<NUM>).