Waterproof LED display device

Abstract

The waterproof LED display device comprises a waterproof cover and an LED carrier plate, the LED carrier plate comprises a plurality of regularly distributed through holes, and the waterproof cover is provided with protruding hole bodies consistent with the through holes in distribution rule, position and shape; the waterproof cover is arranged on the front face of the LED carrier plate, and the hole body is embedded into the through hole and protrudes out of the back face of the LED carrier plate. A sealing glue layer is arranged on at least one of the front surface and the back surface of the LED support plate; connecting parts are arranged among the hole bodies, and the regularly arranged hole bodies are connected together through the connecting parts; at least one edge of the waterproof cover is of a tooth-shaped edge structure, and the tooth-shaped edge structure is formed by arranging semi-hole bodies and connecting parts. Wherein the hole body on the waterproof cover is embedded into the through hole, so that the light transmission of the LED support plate is not influenced. Meanwhile, at least one of the front surface and the back surface of the LED support plate is provided with the sealing glue layer, so that moisture, dust and other external factors can be effectively prevented from invading the LED support plate.

Description

Technical Field

[0001] The present invention relates to the field of LED display, and more particularly to a waterproof LED display device. Background Art

[0002] The PCB carrier is provided with regular through holes, and the non-through hole area is provided with LED light emitters in an array to form a transparent display device, which is widely used for indoor advertising and display. This type of display device is characterized by being thin and transparent, and does not affect the line of sight when not playing, and can achieve the technical effect of transparent display.

[0003] However, when such display devices are used outdoors, they are subject to the influence of external environmental factors such as rain, moisture, and dust, which can easily lead to performance degradation or device damage. Therefore, in order to improve the applicability of such transparent display devices in outdoor environments, it is urgent to effectively waterproof and dustproof them.

[0004] Therefore, it is particularly important to develop a solution that can meet the transparent LED display effect and have good waterproof performance. Summary of the invention

[0005] In view of this, the present invention discloses a waterproof LED display device, which not only meets the transparent display effect, but also has waterproof and dustproof effects.

[0006] The details of this plan are as follows: A waterproof LED display device, comprising a waterproof cover and an LED carrier, wherein the LED carrier comprises a plurality of regularly distributed through holes, and the waterproof cover is provided with a protruding hole body having the same distribution pattern, position and shape as the through holes; The waterproof cover is arranged on the front side of the LED carrier board, and the hole body is embedded in the through hole and protrudes from the back side of the LED carrier board; A sealing layer is provided on at least one of the front and back sides of the LED carrier board; A connecting portion is provided between the holes, and the connecting portion connects the regularly arranged holes together; At least one side of the waterproof cover is a toothed edge structure, and the toothed edge structure is composed of a semi-hole body and a connecting part.

[0007] In a possible implementation, the hole body includes a first hole body and a second hole body, the first hole body includes a first hole body front end face and a first hole body rear end face, the second hole body includes a second hole body front end face and a second hole body rear end face, the second hole body front end face is arranged on the first hole body rear end face, and the second hole body is embedded in the through hole and protrudes from the back side of the LED carrier board.

[0008] In a possible implementation, the inner hole shapes and sizes of the first hole body and the second hole body are the same, and the inner hole shapes of the first hole body and the second hole body are overlapped and connected together.

[0009] In a possible implementation, an outer side wall of the first hole body is higher than an outer side wall of the second hole body.

[0010] In a possible implementation manner, the rear end surface of the first hole body is attached to the non-penetrating area around the through hole on the front side of the LED carrier board.

[0011] In a possible implementation, the connecting portion is integrally provided with the hole body, the connecting portion is provided on the outer side wall of the first hole body, includes a bottom surface and a top surface, and the bottom surface of the connecting portion is aligned with the rear end surface of the first hole body.

[0012] In a possible implementation, the top surface of the connecting portion is aligned with the front end surface of the first hole body.

[0013] In a possible implementation, the sealing layer includes a first sealing layer and a second sealing layer. The first sealing layer is located on the front side of the LED carrier board and is composed of a sealing layer unit, wherein the sealing layer unit is formed by sealing a closed or semi-closed area surrounded by the outer side wall of the first hole body, the side wall of the connecting portion, and the non-penetrating area on the front side of the LED carrier board; The second sealing layer is located on the back side of the LED carrier board and is formed by sealing the outer side walls of the second holes protruding from the back side of the LED carrier board and the non-penetrating area on the back side of the LED carrier board.

[0014] In a possible implementation, it further includes an LED light-emitting body, and the LED light-emitting body is arranged in a non-penetrating area of ​​the LED carrier board on the sealing layer unit area.

[0015] In a possible implementation, the light-emitting surface of the LED light-emitting body exposes the sealing layer unit.

[0016] The present invention provides a waterproof LED display device. By arranging a hole body protruding in accordance with the distribution pattern, position and shape of the through holes on the waterproof cover, it is ensured that when the waterproof cover is installed on the LED carrier, the through holes on the carrier are not blocked, thereby not affecting the transparent display effect of the LED display device. Moreover, the hole body is embedded in the through holes and protrudes from the back of the LED carrier, which not only enhances the bonding stability between the waterproof cover and the LED carrier, but also forms a sealing area on the back of the carrier. A sealing layer is provided on at least one side of the front or back of the LED carrier, which can effectively prevent the intrusion of moisture, dust and other external factors, and significantly prolong the service life of the display device. In addition, one side of the waterproof cover is designed as a toothed edge structure, so as to avoid the edge of the waterproof cover blocking the through holes. Moreover, through the toothed edge structure, multiple waterproof covers can be spliced ​​into a larger waterproof cover, and after splicing, the through holes on the LED carrier will still not be blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] in: Figure 1 It is a schematic diagram of a waterproof cover and an LED carrier board in a waterproof LED display device of the present application; Figure 2 It is a front perspective schematic diagram of a waterproof cover in a waterproof LED display device of the present application; Figure 3 It is a three-dimensional schematic diagram of the back side of a waterproof cover in a waterproof LED display device of the present application; Figure 4 It is a partially enlarged schematic diagram of the front side of a waterproof cover in a waterproof LED display device of the present application; Figure 5 It is a partially enlarged schematic diagram of the back side of a waterproof cover in a waterproof LED display device of the present application; Figure 6 It is a partial schematic diagram of the front side of a waterproof LED display device of the present application; Figure 7 It is a partial schematic diagram of the back side of a waterproof LED display device of the present application; Figure 8 This is a side view of a hole in a waterproof cover of a waterproof LED display device of the present application; Fig. 9 This is a side view of the hole body and the connection part of the waterproof cover in a waterproof LED display device of the present application. Fig.10 It is a partially enlarged schematic diagram of the second sealing layer on the back side of a waterproof cover for LED display in the present application. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the prior art, there is a perforated PCB carrier board, which is provided with regular through holes, and LED lamp beads are provided in the non-through area to form a transparent display device, which can achieve high-quality LED transparent display effects. However, when used outdoors, this type of display device is easily affected by external factors such as rain, moisture and dust, which can easily cause device damage or performance degradation. Therefore, the transparent display device has deficiencies in waterproof performance and cannot meet the use requirements of outdoor environments.

[0021] Based on this, the present application provides a waterproof LED display device, which is waterproof and dustproof.

[0022] like Figure 1 , Figure 6 as well as Figure 7 As shown, a waterproof LED display device includes a waterproof cover 1 and an LED carrier board 4. The LED carrier board 4 is provided with regularly distributed through holes 40, and the waterproof cover 1 is provided with protruding hole bodies 10 that are consistent with the distribution pattern, position and shape of these through holes 40. The waterproof cover 1 is arranged on the front side of the LED carrier board 4, and the hole bodies 10 are embedded in the through holes 40 and protrude from the back side of the LED carrier board 4. In addition, a sealing layer is arranged on at least one side of the front and back sides of the LED carrier board 4, which can provide waterproof and dustproof effects for the carrier board.

[0023] Understandably, Figure 1 The outer wall shape of the through hole 40 and the hole body 10 is shown as a circle only as an example, not a limitation. The shape of the through hole 40 and the hole body 10 may depend on the actual situation. The present application does not limit the shape of the outer wall of the through hole 40 and the hole body 10, and allows it to be a variety of regular or irregular forms such as a rectangle, a diamond, a triangle, etc.

[0024] like Figure 2 , Figure 3 As shown, Figure 2 , Figure 3It is a three-dimensional schematic diagram of the waterproof cover 1. The waterproof cover 1 is provided with regularly arranged holes 10. Connecting parts 20 are provided between the holes 10. The connecting parts 20 and the holes 10 are integrally provided to connect the regularly arranged holes 10 together.

[0025] Further, such as Figure 4 , Figure 5 and 8 As shown, the hole body 10 also includes a first hole body 11 and a second hole body 12, and the inner holes of the first hole body 11 and the second hole body 12 ( Figure 8 The dotted line in the middle hole 10 indicates the inner hole) has the same shape and size, and the inner hole shapes of the first hole 11 and the second hole 12 overlap and are arranged together. The first hole 11 includes a first hole front end face 111 and a first hole rear end face 112, and the second hole includes a second hole front end face and a second hole rear end face 123, and the second hole front end face is arranged on the first hole rear end face 112. When the waterproof cover 1 is arranged on the LED carrier 4, the second hole 12 is embedded in the through hole 40 on the LED carrier 4 and protrudes from the back of the LED carrier 4.

[0026] like Fig. 9 As shown, the connecting portion 20 includes a bottom surface 22 and a top surface 21 , and the bottom surface 22 of the connecting portion is aligned with the rear end surface 112 of the first hole body.

[0027] like Figure 8 As shown, Figure 8 It is a side view of the hole body 10. The first hole body 11 and the second hole body 12 also include outer walls. The connecting portion 20 is arranged on the outer wall 113 of the first hole body, and the outer wall 113 of the first hole body 11 is higher than the outer wall 121 of the second hole body. The following is an example in which the outer walls of the first hole body 11 and the second hole body 12 are circular.

[0028] If the outer wall shapes of the first hole body 11 and the second hole body 12 are circular, the outer wall 113 of the first hole body is higher than the outer wall 121 of the second hole body, which means that the outer diameter of the first hole body 11 is larger than the outer diameter of the second hole body 12. When the waterproof cover 1 is set on the LED carrier 4, the second hole body 12 needs to be embedded in the through hole of the LED carrier 4. In order to ensure that the waterproof cover 1 is relatively fixed in the horizontal direction, the second hole body 12 should cooperate with the through hole 40 on the LED carrier 4, so that the second hole body 12 can be smoothly embedded, and at the same time, the waterproof cover 1 is prevented from being displaced too much in the horizontal direction, so as to avoid the waterproof cover 1 from being misplaced during the sealing process.

[0029] Moreover, the first hole body outer side wall 113 is higher than the second hole body outer side wall 121. When the second hole body 12 is inserted into the through hole 40, the first hole body rear end face 112 is attached to the non-penetrating area around the through hole 40 of the LED carrier board 4. At this time, the first hole body outer side wall 113, the side wall of the connecting portion 20 and the non-penetrating area on the front of the LED carrier board 4 can enclose the area where the glue sealing layer unit 41 is located, thereby preventing glue leakage from the glue sealing layer unit 41.

[0030] In addition, by setting the outer wall 113 of the first hole body 11 higher than the outer wall 121 of the second hole body 12, when sealing the back of the LED carrier board 4, it can also prevent the glue on the back of the LED carrier board 4 from flowing to the front. This is described in detail below and will not be repeated here.

[0031] Furthermore, in this embodiment, the sealing layer includes a first sealing layer and a second sealing layer. The first sealing layer is disposed on the front of the LED carrier 4 and is composed of a sealing layer unit 41. The sealing layer unit 41 is formed by sealing a closed or semi-closed area surrounded by the outer side wall 113 of the first hole body, the side wall of the connecting portion 20, and the non-penetrating area on the front of the LED carrier 4. Specifically, Figure 4 , Figure 5 , Figure 6 As shown, the rear end face 112 of the first hole body 11 and the bottom face 22 of the connecting portion are attached to the non-penetrating area on the front side of the LED carrier board 4, and the outer side wall 113 of the first hole body, the side wall of the connecting portion 20 and the non-penetrating area on the front side of the LED carrier board 4 are surrounded to form a closed or semi-closed area, and the area is sealed with glue to form a glue sealing layer unit 41 ( Figure 4 , Figure 5 as well as Figure 6 A glue sealing layer unit 41 is marked with a dotted line), and the multiple glue sealing layer units 41 on the front side of the carrier board 4 constitute a first glue sealing layer.

[0032] In this embodiment, the LED display device also includes an LED light-emitting body 5 located on the front side of the LED carrier board 4. The LED light-emitting body 5 is arranged in a non-penetrating area of ​​the LED carrier board 4 in the area where the sealing layer unit 41 is located, that is, the non-penetrating area located on the outer side wall 113 of the first hole body, the side wall of the connecting portion 20 and the front side of the LED carrier board 4 surround a closed or semi-closed area. The sealing layer unit 41 seals the LED light-emitting body 5 in the area, which can effectively protect the LED light-emitting body 5 and its surrounding circuits from moisture and dust, and the sealing layer unit 41 can also fix the waterproof cover 1 and the LED carrier board 4 together.

[0033] It should be pointed out that in order not to affect the light-emitting effect of the LED light-emitting body 5 , the light-emitting surface of the LED light-emitting body 5 may expose the sealing layer unit 41 .

[0034] In some embodiments, Fig. 9 As shown, the bottom surface 22 of the connecting portion is aligned with the rear end surface 112 of the first hole body 11, and the top surface 21 of the connecting portion is aligned with the front end surface 111 of the first hole body 11, that is, the heights of the connecting portion 20 and the first hole body 11 are both h. At this time, the outer side wall 113 of the first hole body 11, the side wall of the connecting portion 20 and the non-penetrating area on the front side of the LED carrier board 4 are surrounded to form a closed area.

[0035] In other embodiments, the top surface 21 of the connecting portion may be lower than the front end surface 111 of the first hole body 11, that is, the height of the connecting portion 20 is less than the height of the first hole body 11. At this time, the outer wall 113 of the first hole body 11, the side wall of the connecting portion 20 and the non-penetrating area on the front side of the LED carrier board 4 surround and form a semi-enclosed area. When the area is sealed with glue, after the glue reaches a certain height, it will naturally flow out from the connecting portion 20 and flow to the adjacent glue sealing layer unit area, which can improve the efficiency of the sealing.

[0036] It is understandable that the thickness of the first sealing layer depends on the actual situation, that is, the thickness of the first sealing layer needs to be reached in order to achieve the waterproof and dustproof effect. Therefore, the present application does not limit the height of the first sealing layer, and it can be adjusted according to the actual situation.

[0037] In some large-sized LED carriers 4, in order to solve the problem of insufficient power supply at the far end of the LED light source, the power supply circuit will be thickened. Because the space inside the carrier is limited, a thickened power supply circuit will be set on the back of the LED carrier 4. The power supply circuit is exposed outside the carrier and is easily affected by rain and dust. Therefore, the back of the LED carrier 4 also needs to be waterproofed. If the glue is directly sealed on the back of the LED carrier 4, there are through holes on the LED carrier 4, and the glue is easy to leak from the through holes 40 and solidify at the through holes 40, affecting the display effect of the LED display device. Therefore, direct sealing is more difficult.

[0038] Based on this, in this embodiment, a second sealing layer is provided on the back of the LED carrier 4, and the second sealing layer is formed by sealing the outer side walls 121 of the second holes protruding from the back of the LED carrier 4 and the non-penetrating area on the back of the LED carrier 4. Figure 3 , Figure 5 , Figure 7 As shown, when the waterproof cover 1 is set on the front side of the LED carrier board 4, the second hole body 12 is embedded in the through hole 40 on the LED carrier board 4, and passes through the through hole 40 on the LED carrier board 4, and exceeds the plane where the back side of the LED carrier board 4 is located by a certain length. The exceeding part forms an area with the back side of the LED carrier board 4, and the area is sealed with glue to form a second glue sealing layer. The exceeding part of the second hole body 12 acts as a dam. When the waterproof glue layer is filled on the back side of the LED carrier board 4, it can prevent the glue from leaking from the through hole 40 when the back side of the LED carrier board 4 is sealed with glue.

[0039] In some embodiments, Fig.10 As shown, the bottom surface 22 of the connection portion at the edge of the waterproof cover 1 ( Fig.10 The dotted line frame portion in the middle) can be aligned with the rear end face 112 of the first hole body. On the back of the LED carrier board 4, the outer side walls of the protruding multiple second holes 12 and the back of the LED carrier board 4 form an area of ​​the second sealing layer. Because the bottom surface of the connecting portion 20 at the edge of the waterproof cover 1 is aligned with the rear end face 112 of the first hole body, it is not aligned with the rear end face 123 of the second hole body. Fig.10 From a middle view (seen from the back of the waterproof cover 1 ), the height of the connecting portion 20 at the edge of the waterproof cover 1 is lower than the height of the second hole 12 , and the second sealing layer area formed at this time is a semi-enclosed area.

[0040] In other embodiments, the connection portion 20 ( Fig.10 The bottom surface of the dotted line frame portion) can be aligned with the rear end surface 123 of the second hole body. At this time, on the back of the waterproof cover 1, a second sealing layer area is formed between the outer side walls of the regularly arranged plurality of second hole bodies 12 and the connecting portion 20. Because the bottom surface of the connecting portion 20 at the edge of the waterproof cover 1 is aligned with the rear end surface 123 of the second hole body, Fig.10 From a middle perspective (seen from the back of the waterproof cover 1 ), the height of the connecting portion 20 at the edge of the waterproof cover 1 is equal to the height of the second hole 12 , and the second glue sealing layer formed at this time is a closed area.

[0041] It should be noted that, the through hole 40 and the hole body 10 are still circular for illustration. In order to enable the second hole body 12 to be embedded in the through hole 40, the second hole body 12 and the through hole 40 should be matched. Therefore, when the back of the LED carrier 4 is sealed with glue, part of the glue may flow along the gap between the second hole body 12 and the through hole 40 to the front of the carrier. Therefore, in this embodiment, the outer wall 113 of the first hole body is set higher than the outer wall 121 of the second hole body 12. When the waterproof cover 1 is installed on the LED carrier 4, the first hole body 11 is embedded in the through hole 40 and matched with the through hole 40. The rear end surface of the first hole body 11 is flatly attached to the non-penetrating area on the front of the LED carrier 4, which is equivalent to forming a tight annular structure around the through hole 40 on the front of the LED carrier 4. When the back of the LED carrier 4 is sealed with glue, the glue will not affect the front of the LED carrier 4. At the same time, part of the glue remains in the gap between the second hole body 12 and the through hole 40, which can also play a role in sealing and protecting the LED carrier 4.

[0042] In this embodiment, by setting a second sealing layer, the outer side walls of the second holes 12 protruding from the back of the carrier board and the closed semi-closed area formed by the back of the LED carrier board 4 are sealed, which can solve the problem of waterproofing the back of the LED carrier board 4.

[0043] It is understandable that the length of the second hole 12 extending beyond the LED carrier 4 depends on the thickness of the back sealant, that is, the thickness of the sealant layer needs to reach in order to achieve a waterproof effect. Therefore, this embodiment does not limit the length of the second hole 12 extending beyond the LED carrier 4.

[0044] In some display scenes that require a large size, it is usually necessary to splice multiple smaller LED carriers 4 to obtain a large LED carrier 4. In order to achieve seamless splicing, such as Figure 1 As shown, in this embodiment, the edge of the LED carrier 4 includes a carrier toothed edge 42 composed of half through holes 40 and non-through areas. When the LED carriers 4 are spliced ​​together, the two half through holes 40 are spliced ​​together to form a complete through hole 40, thereby achieving seamless splicing.

[0045] Corresponding to the carrier toothed edge 42 of the LED carrier 4, as Figure 2 , Figure 3 As shown, in this embodiment, at least one side of the waterproof cover 1 is provided with a toothed edge structure 30 composed of a half hole body 10 and a connecting portion 20. When the waterproof cover 1 is set on the LED carrier 4, the toothed edge structure 30 of the waterproof cover 1 will not block the carrier toothed edge 42 of the LED carrier 4. Moreover, the waterproof cover 1 and the carrier can be seamlessly spliced. When the waterproof cover 1 is spliced, the two half hole bodies 10 are combined into a complete hole body 10, and the two connecting portions 20 are also spliced ​​to form a complete connecting portion 20, which does not block the through hole 40 on the LED carrier 4. In this embodiment, by providing a toothed edge structure on at least one side of the waterproof cover 1, the waterproof cover 1 can be spliced ​​into a larger waterproof cover 1 to meet the waterproof requirements of a large-sized LED carrier 4.

[0046] It should be pointed out that the present embodiment does not limit the waterproof cover 1 to have the toothed structure 30 on only one side. In fact, the toothed structure 30 may be provided on part or all sides of the waterproof cover 1. The specific design depends on the actual application scenario, and the present application does not impose any limitation on this.

[0047] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A waterproof LED display device, comprising a waterproof cover and an LED carrier board, characterized in that: The LED carrier board includes a plurality of regularly distributed through holes, and the waterproof cover is provided with protruding holes that are consistent with the distribution pattern, position and shape of the through holes; The waterproof cover is arranged on the front side of the LED carrier board, and the hole body is embedded in the through hole and protrudes from the back side of the LED carrier board; A sealing layer is provided on at least one of the front and back sides of the LED carrier board; A connecting portion is provided between the holes, and the connecting portion connects the regularly arranged holes together; At least one side of the waterproof cover is a toothed edge structure, and the toothed edge structure is composed of a semi-hole body and the connecting part.

2. The display device according to claim 1, wherein: The hole body includes a first hole body and a second hole body, the first hole body includes a first hole body front end face and a first hole body rear end face, the second hole body includes a second hole body front end face and a second hole body rear end face, the second hole body front end face is arranged on the first hole body rear end face, and the second hole body is embedded in the through hole and protrudes from the back side of the LED carrier board.

3. The display device according to claim 2, wherein: The inner hole shapes and sizes of the first hole body and the second hole body are the same, and the inner hole shapes of the first hole body and the second hole body are overlapped and connected together.

4. The display device according to claim 3, characterized in that The outer side wall of the first hole body is higher than the outer side wall of the second hole body.

5. The display device according to claim 4, characterized in that The rear end surface of the first hole body is attached to the non-penetrating area around the through hole on the front side of the LED carrier board.

6. The display device according to any one of claims 4 or 5, characterized in that: The connecting portion is integrally arranged with the hole body, and the connecting portion is arranged on the outer side wall of the first hole body, including a bottom surface and a top surface, and the bottom surface of the connecting portion is aligned with the rear end surface of the first hole body.

7. The display device according to claim 6, characterized in that The top surface of the connecting portion is aligned with the front end surface of the first hole body.

8. The display device according to claim 1, wherein: The sealing layer includes a first sealing layer and a second sealing layer. The first sealing layer is located on the front side of the LED carrier board and is composed of a sealing layer unit, wherein the sealing layer unit is formed by sealing a closed or semi-closed area surrounded by the outer side wall of the first hole body, the side wall of the connecting portion, and the non-penetrating area on the front side of the LED carrier board; The second sealing layer is located on the back side of the LED carrier board and is formed by sealing the outer side walls of the second holes protruding from the back side of the LED carrier board and the non-penetrating area on the back side of the LED carrier board.

9. The display device according to claim 8, wherein: It also includes an LED light-emitting body, and the LED light-emitting body is arranged in the non-penetrating area of ​​the LED carrier board on the sealing layer unit area.

10. The display device according to claim 9, characterized in that The light-emitting surface of the LED light-emitting body exposes the sealing layer unit.

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