Double-sided LED display device

Abstract

The invention discloses a double-sided LED display device which comprises a first layer of LED carrier plate and a second layer of LED carrier plate, LED luminous bodies are evenly arranged on the front faces of the first layer of LED carrier plate and the second layer of LED carrier plate, and the back faces of the first layer of LED carrier plate and the second layer of LED carrier plate are arranged together in an attached mode. The finished double-sided LED display device is a thin LED display screen, and on the basis, the through holes are regularly formed in the LED carrier plate, so that the double-sided LED display device can achieve a transparent or semitransparent visual effect.

Description

Technical Field

[0001] The present invention relates to the technical field of LED display, and in particular to a double-sided LED display device. Background Art

[0002] This invention relates to large-screen LED displays (not OLED displays like those used on mobile phones or tablets), such as advertising screens in public places like shopping malls and airports. Conventional LED display technology is highly mature within the industry, and the current trend is to make LED displays as thin as possible, even achieving transparent or translucent visual effects.

[0003] Patent CN114863868A discloses an LED display carrier board. This LED display carrier board has a regular pattern of through-holes on the PCB. In the non-through-hole areas, LED illuminators are arrayed to form a transparent display device. The product is very thin and transparent, achieving a transparent display effect. However, patent CN114863868A only enables single-sided display.

[0004] Many occasions require double-sided displays, such as the huge display equipment hung in the airport lobby. Passengers facing the display side can see flight information, but passengers on the other side need to move to the display side to read the flight information, which causes congestion. If passengers on the other side can also see the flight information without moving, it will be very beneficial to passenger travel and airport management. Summary of the Invention

[0005] In view of the above shortcomings of the prior art, the present invention discloses a double-sided LED display device. The technical solution of the present invention is as follows: A double-sided LED display device includes a first layer of LED carrier board and a second layer of LED carrier board, wherein LED illuminants are evenly arranged on the front sides of the first layer of LED carrier board and the second layer of LED carrier board, and the back sides of the first layer of LED carrier board and the second layer of LED carrier board are laminated together.

[0006] Furthermore, the first layer of LED carriers is provided with regularly distributed first through-holes, and the second layer of LED carriers is provided with second through-holes having the same regular distribution as the first through-holes. When the first and second layers of LED carriers are bonded together, the first through-holes and the second through-holes at corresponding positions overlap.

[0007] In this technical solution, at least one side of the first layer LED carrier board and the second layer LED carrier board is a toothed edge structure composed of half holes, and at least one side of the double-sided LED display device formed by the first layer LED carrier board and the second layer LED carrier board is also a toothed edge structure composed of half holes.

[0008] In this technical solution, the double-sided LED display device further includes a support layer, and the support layer is arranged between the first layer of LED carrier board and the second layer of LED carrier board.

[0009] Furthermore, the double-sided LED display device further comprises a support layer, and the support layer is arranged between the first layer of LED carrier board and the second layer of LED carrier board.

[0010] Furthermore, the support layer is provided with regularly distributed third through holes. When the support layer is provided between the first layer of LED carrier board and the second layer of LED carrier board, the third through holes at corresponding positions coincide with the first through holes and the second through holes.

[0011] In the technical solution, at least one side of the support layer has a toothed edge structure consisting of half holes.

[0012] In a further technical solution, the first layer of LED carrier board is composed of multiple sub-first layer LED carrier boards, and a first splicing seam is formed between adjacent sub-first layer LED carrier boards; the second layer of LED carrier board is composed of multiple sub-second layer LED carrier boards, and a second splicing seam is formed between adjacent sub-second layer LED carrier boards, and the first splicing seam is aligned with the second splicing seam.

[0013] Furthermore, the support layer is composed of at least one sub-support layer spliced ​​together.

[0014] When the support layer includes a sub-support layer, the sub-support layer is directly arranged between a first layer of LED carrier boards formed by splicing a plurality of sub-first layer LED carrier boards and a second layer of LED carrier boards formed by splicing a plurality of sub-second layer LED carrier boards.

[0015] When the support layer includes multiple sub-support layers, the support layer is composed of multiple sub-support layers spliced ​​together, and a third splicing seam is formed between adjacent sub-support layers; when the sub-support layer is arranged between the first layer of LED carrier board and the second layer of LED carrier board, the third splicing seam is staggered with the first splicing seam and the second splicing seam.

[0016] In this technical solution, an insulating layer is provided between the support layer and the first layer of LED carrier board and the second layer of LED carrier board.

[0017] In one technical solution, the support layer is made of a transparent material.

[0018] In another alternative technical solution, the support layer is made of one of stainless steel, copper, alloy, carbon fiber or polyurethane fiber.

[0019] The present invention discloses a double-sided LED display device comprising a double-layer LED carrier board. In this technical solution, each layer of the LED carrier board is very thin, resulting in a thin, relatively large LED display screen. Furthermore, the LED carrier board is also regularly provided with through-holes, enabling the double-sided LED display device to achieve a transparent or translucent visual effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of the first layer of LED carrier board in a double-sided LED display device of the present invention; Figure 2 This is a schematic structural diagram of the second layer of LED carrier board in a double-sided LED display device of the present invention; Figure 3 This is a schematic structural diagram of an embodiment of a support layer in a double-sided LED display device of the present invention; Figure 4 This is a schematic structural diagram of another embodiment of a support layer in a double-sided LED display device of the present invention; Figure 5 This is a side view of an embodiment of a double-sided LED display device of the present invention; Figure 6 yes Figure 5 A side view of a first layer LED carrier board, a second layer LED carrier board and a support layer in an embodiment of a double-sided LED display device; Figure 7 This is a side view of another embodiment of a double-sided LED display device of the present invention; Figure 8 yes Figure 7 A side view of a first layer LED carrier board, a second layer LED carrier board and a support layer in an embodiment of a double-sided LED display device; Figure 9 This is a side view of an embodiment of the structure of a sub-first layer LED carrier board, a sub-second layer LED carrier board, and a sub-support layer in a double-sided LED display device of the present invention; Figure 10 This is a side view of another embodiment of the structure of a sub-first layer LED carrier board, a sub-second layer LED carrier board and a sub-support layer in a double-sided LED display device of the present invention. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below with reference to the accompanying drawings.

[0022] To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. Those skilled in the art will understand that some well-known structures and their descriptions are omitted in the drawings. The same or similar reference numerals correspond to the same or similar components.

[0023] This invention solves the technical problem of achieving double-sided display in thin LED display devices. Patent CN114863868A discloses an LED carrier board approximately 0.5 mm thick. One side of the LED carrier board is equipped with surface-mount LED light-emitting chips, while the other side is free of any components. LED display devices formed using the LED carrier board disclosed in CN114863868A are extremely thin, and achieving double-sided display in such thin products is a technical problem that those skilled in the art need to solve.

[0024] The embodiments of the present invention are as follows: This embodiment Figure 1 and Figure 2 As shown, a double-sided LED display device includes a first layer LED carrier board 10 and a second layer LED carrier board 20, wherein the front surfaces of the first layer LED carrier board 10 and the second layer LED carrier board 20 are evenly provided with LED light-emitting bodies 40, and the back surfaces of the first layer LED carrier board 10 and the second layer LED carrier board 20 are bonded together.

[0025] The LED light emitting body 40 in this embodiment is preferably a surface-mount LED light emitting chip, which includes an R light emitting chip (red light emitting chip), a G light emitting chip (green light emitting chip) and a B light emitting chip (blue light emitting chip).

[0026] In this embodiment, the first layer of LED substrate 10 is provided with regularly distributed first through-holes 12, and the second layer of LED substrate 20 is provided with second through-holes 22 that are arranged in the same regular pattern as the first through-holes 12. When the first layer of LED substrate 10 and the second layer of LED substrate 20 are placed together, the first through-holes 12 and the second through-holes 22 at corresponding positions overlap.

[0027] The technical effect to be achieved by this embodiment is that when the first layer of LED carrier board 10 and the second layer of LED carrier board 20 are attached together, the first through hole 12 and the second through hole 22 at the corresponding position can be merged into one through hole. Figure 8 It is shown that the first through hole 12 , the second through hole 22 and the third through hole 32 (through holes on the support layer, which will be described below) overlap to form a through hole that penetrates the double-sided LED display device.

[0028] For the first through-hole 12 and the second through-hole 22 at corresponding positions to merge into one through-hole, the specifications of the first through-hole 12 and the second through-hole 22 must be consistent. Therefore, the preferred solution in this embodiment is that the first through-hole 12 and the second through-hole 22 have the same specifications, including shape and size. It should be noted that if the first through-hole 12 and the second through-hole 22 do not have the same specifications, but can still overlap to form a through-hole, and this through-hole can achieve a transparent or translucent visual effect, such a solution is also within the scope of protection of the present invention.

[0029] This embodiment Figure 1 and Figure 2 As shown, at least one side of the first layer LED carrier board 10 and the second layer LED carrier board 20 has a toothed edge structure 60 composed of half holes 50. In this embodiment, the double-sided LED display device formed by the first layer LED carrier board 10 and the second layer LED carrier board 20 also has at least one side having a toothed edge structure 60 composed of half holes 50.

[0030] The serrated edge structure 60 of the double-sided LED display device is formed by aligning and laminating the serrated edge structures 60 of the first layer LED carrier board 10 and the second layer LED carrier board 20 together.

[0031] When multiple double-sided LED display devices are joined together to form a larger double-sided LED display device, or when multiple first-layer LED carrier boards 10 and second-layer LED carrier boards 20 are joined together to form a larger LED carrier board, the splicing edges with the serrated edge structure are joined together, and adjacent half holes 50 form a complete through-hole, creating a seamless joint. It should be noted that the double-sided LED display device or the first-layer LED carrier board 10 and the second-layer LED carrier board 20 can be seamlessly joined not only in the width direction but also in the length direction.

[0032] This embodiment Figures 3 to 10 As shown, the double-sided LED display device further includes a support layer 30 , and the support layer 30 is disposed between the first LED carrier board 10 and the second LED carrier board 20 .

[0033] The first and second LED carrier boards 10, 20 are typically PCBs with a thickness of approximately 0.5 mm. Each of the first and second LED carrier boards 10, 20 is 1.5 m long and 25 cm wide. The width can be an integer multiple of 25 cm, and the presence of the serrated edge structure 60 allows for seamless splicing. It should be noted that the wiring direction is along the length of the LED carrier board. A single LED carrier board represents an independent power supply system, and no electrical connection is required between multiple LED carrier boards along the width.

[0034] If a longer double-sided LED display device is required, the first and second LED carrier boards 10 and 20 need to be spliced ​​lengthwise. The presence of the serrated edge structure 60 also allows for seamless splicing. However, it should be noted that the first and second LED carrier boards 10 and 20 are very thin and lack strength. As they grow longer, they are more likely to break under their own weight. Furthermore, if they are too flexible, they are susceptible to deformation by external forces. For these reasons, an additional support layer is necessary.

[0035] In one embodiment, the support layer 30 is made of a transparent material, such as glass, acrylic, etc. In this case, the support layer 30 does not need to be provided with a third through hole, and a transparent or translucent visual effect can be achieved. Figure 3 、 Figure 5 and Figure 6 As shown, Figure 5 and Figure 6 This is a side view of a double-sided LED display device. It can be seen from the figure that the support layer 30 of the middle layer is a whole plate without holes.

[0036] In another embodiment, the support layer 30 is made of one of opaque stainless steel, copper, alloy, carbon fiber or polyurethane fiber.

[0037] In this embodiment, in order to achieve a transparent or translucent visual effect, it is necessary to provide regularly distributed third through holes 32 on the support layer 30, such as Figure 4 、 Figure 7 and Figure 8 shown.

[0038] In this embodiment, when the support layer 30 is disposed between the first layer LED carrier 10 and the second layer LED carrier 20, the third through hole 32 at the corresponding position coincides with the first through hole 12 and the second through hole 22. Figure 8 As shown, the first through hole 12, the second through hole 22 and the third through hole 32 overlap and stack together to form a through hole that penetrates the double-sided LED display device. It should be noted that in the preferred embodiment, the specifications of the first through hole 12, the second through hole 22 and the third through hole 32 are consistent.

[0039] In this embodiment, Figure 4 As shown, at least one side of the support layer 30 is a serrated edge structure 60 composed of half holes 50. The serrated edge structure on the support layer 30 and the serrated edge structures of the first layer LED carrier board 10 and the second layer LED carrier board 20 are aligned and stacked together to form the serrated edge structure of the double-sided LED display device.

[0040] In this embodiment, when the support layer 30 is a metal plate, an insulating layer needs to be provided between the support layer 30 and the first LED carrier board 10 and the second LED carrier board 20 .

[0041] In this embodiment, LED light-emitting bodies are set on the front of the first layer LED carrier board 10 and the second layer LED carrier board 20, and power supply lines (including VDD and GND) are set on the back along the length direction of the LED carrier board. An insulating layer is required for the power supply lines and the support layer 30.

[0042] In another possible embodiment, Figure 9 and Figure 10 As shown, the first layer LED carrier board 10 is composed of a plurality of sub-first layer LED carrier boards 11, and a first splicing seam 13 is formed between adjacent sub-first layer LED carrier boards 11; the second layer LED carrier board 20 is composed of a plurality of sub-second layer LED carrier boards 21, and a second splicing seam 23 is formed between adjacent sub-second layer LED carrier boards 21, and the first splicing seam 13 is aligned with the second splicing seam 23.

[0043] In actual applications, due to limitations in the PCB production process, the width of the first-layer LED substrate 10 and the second-layer LED substrate 20 is limited. If a larger width is required, the first-layer LED substrate 10 and the second-layer LED substrate 20 must be spliced ​​together in the width direction. This splicing creates a first splicing seam 13 and a second splicing seam 23. Therefore, the first-layer LED substrate 10 and the second-layer LED substrate 20 are composed of corresponding sub-LED substrates. It should be noted that the structure of the sub-first-layer LED substrate 11 and the sub-second-layer LED substrate 21 is identical to that of the corresponding first-layer LED substrate 10 and the second-layer LED substrate 20, and this point will not be further described in this embodiment.

[0044] In this embodiment, due to the provision of the serrated edge structure, the first splicing seam 13 and the second splicing seam 23 are splicing seams with a seamless splicing effect.

[0045] In this embodiment, the specifications of the first and second LED carrier boards 10 and 20 are preferably the same, and the specifications of the sub-first and second LED carrier boards 11 and 21 are also preferably the same. In this way, after alignment and splicing, the first and second splicing seams 13 and 23 are also aligned vertically.

[0046] In this embodiment, the support layer 30 is composed of at least one sub-support layer 31 spliced ​​together.

[0047] It should be noted that the support layer 30 is preferably a thin stainless steel sheet. While stainless steel sheet production processes can produce very large sheets, this also has its limits. Therefore, when stainless steel sheets exceed their limits or are produced under optimal cost and process conditions, splicing is necessary, particularly in the width direction. In this embodiment, the sub-support layer 31 has the same structure as the support layer 30.

[0048] In this embodiment, when the supporting layer 30 includes a sub-supporting layer 31, the sub-supporting layer 31 is directly arranged between the first-layer LED carrier 10 formed by splicing multiple sub-first-layer LED carriers 11 and the second-layer LED carrier 20 formed by splicing multiple sub-second-layer LED carriers 21.

[0049] In this embodiment, when the support layer 30 includes multiple sub-support layers 31, the support layer 30 is composed of multiple sub-support layers 31, and a third splicing seam 33 is formed between adjacent sub-support layers 31. When the sub-support layer 31 is arranged between the first layer of LED carrier board 10 and the second layer of LED carrier board 20, the third splicing seam 33 is staggered with the first splicing seam 13 and the second splicing seam 23 in the width direction, such as Figure 9 and Figure 10 shown.

[0050] In this embodiment, due to the provision of the serrated edge structure, the third joint seam 33 is a joint seam with a seamless joint effect.

[0051] In this embodiment, the third seam 33 is staggered from the first and second seams 13, 23. Because the first and second seams 13, 23 are aligned vertically, the sub-support layer 31 covers them. This arrangement provides the advantage that the support layer 31 also securely connects adjacent sub-first-layer LED carrier boards 11 and adjacent sub-second-layer LED carrier boards 21 in the width direction.

[0052] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A double-sided LED display device, comprising a first layer LED carrier board and a second layer LED carrier board, characterized in that: LED illuminants are evenly arranged on the front sides of the first layer of LED carrier boards and the second layer of LED carrier boards, and the back sides of the first layer of LED carrier boards and the second layer of LED carrier boards are laminated together.

2. The double-sided LED display device according to claim 1, characterized in that: The first layer of LED carrier is provided with regularly distributed first through holes, and the second layer of LED carrier is provided with regularly distributed second through holes consistent with the first through holes; When the first layer of LED carrier board and the second layer of LED carrier board are bonded together, the first through holes and the second through holes at corresponding positions are overlapped.

3. The double-sided LED display device according to claim 2, characterized in that: At least one side of the first layer LED carrier board and the second layer LED carrier board is a toothed side structure composed of half holes, and at least one side of the double-sided LED display device formed by the first layer LED carrier board and the second layer LED carrier board is also a toothed side structure composed of half holes.

4. The double-sided LED display device according to claim 1, characterized in that: The double-sided LED display device comprises a supporting layer, and the supporting layer is arranged between the first layer of LED carrier board and the second layer of LED carrier board.

5. The double-sided LED display device according to claim 3, characterized in that: The double-sided LED display device comprises a supporting layer, and the supporting layer is arranged between the first layer of LED carrier board and the second layer of LED carrier board.

6. The double-sided LED display device according to claim 5, characterized in that: The support layer is provided with regularly distributed third through holes. When the support layer is provided between the first layer of LED carrier board and the second layer of LED carrier board, the third through holes at corresponding positions overlap with the first through holes and the second through holes. At least one side of the support layer is a toothed side structure consisting of half holes.

7. The double-sided LED display device according to claim 4 or 6, characterized in that: The first layer of LED carrier board is composed of a plurality of first layer sub-LED carrier boards, and a first splicing seam is formed between adjacent first layer sub-LED carrier boards; The second layer of LED carrier board is composed of a plurality of second layer LED carrier boards, and a second joint seam is formed between adjacent second layer LED carrier boards. The first seam is aligned with the second seam.

8. The double-sided LED display device according to claim 7, characterized in that: The support layer is composed of at least one sub-support layer spliced ​​together; When the support layer includes a sub-support layer, the sub-support layer is directly arranged between a first layer of LED carrier boards formed by splicing a plurality of sub-first layer LED carrier boards and a second layer of LED carrier boards formed by splicing a plurality of sub-second layer LED carrier boards; When the support layer includes multiple sub-support layers, the support layer is composed of multiple sub-support layers spliced ​​together, and a third splicing seam is formed between adjacent sub-support layers; when the sub-support layer is arranged between the first layer of LED carrier board and the second layer of LED carrier board, the third splicing seam is staggered with the first splicing seam and the second splicing seam.

9. The double-sided LED display device according to claim 4 or 5, characterized in that: An insulating layer is arranged between the support layer and the first layer of LED carrier board and the second layer of LED carrier board.

10. The double-sided LED display device according to claim 4, characterized in that: The supporting layer is made of transparent material.

11. The double-sided LED display device according to claim 6, characterized in that: The supporting layer is made of one of stainless steel, copper, alloy, carbon fiber or polyurethane fiber.

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