Spliced lamp panel and display equipment

Abstract

The utility model provides a spliced lamp panel. The spliced lamp panel comprises a plurality of lamp panel units. According to the spliced lamp panel, due to the fact that the second surfaces of the adjacent PCBs are welded and / or bonded, the multiple lamp panel units are connected into an integrated structure, the situation that the lamp panel units need to be installed on a box one by one when the display equipment is assembled is avoided, and the installation efficiency of the display equipment is improved. Besides, the multiple lamp panel units are connected into an integrated structure before the display equipment is assembled, splicing gaps between the lamp panel units can be obviously improved or eliminated by controlling the machining precision of the lamp panel, compared with the prior art, the requirement for the machining precision of the box body is lowered, the production cost is lowered, and the production efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and particularly relates to a splicing light board and a display device having the same. Background Art

[0002] With the development of display technology, the demand for various extra-large display devices is increasing day by day, and their applications in various scenarios are also becoming more and more extensive. At present, most large LED display screens are composed of multiple display devices spliced together. The display device includes a box body and a plurality of LED light boards. The LED light board is mainly composed of a PCB board and a large number of lamp beads welded to the PCB board, and the lamp beads are used for display.

[0003] Limited by the production process, the size of the LED light board is much smaller than that of the box body. For example, 16 light boards are provided on each box body, and the 16 light boards are arranged in a 4-row and 4-column array on the box body. In the related art, in order to fix the light board on the box body, generally a plurality of positioning posts are arranged in the box body, and the plurality of positioning posts divide the installation surface on the box body into a plurality of light board installation areas (the number of light board installation areas is the same as the number of light boards). When assembling the display device, it is necessary to align each light board with the positioning posts on the corresponding light board installation area to realize the positioning and fixing of the light board (for example, each light board is magnetically fixed to the positioning posts on the corresponding light board installation area), resulting in a cumbersome assembly process. In addition, in the related art, it is necessary to strictly control the processing accuracy of the positioning posts and the light board units in order to make the splicing gap between two adjacent light boards fixed in the box body smaller, resulting in high processing costs, great leveling difficulty, and it is difficult to completely eliminate the splicing gap. Summary of the Utility Model

[0004] The present application provides a splicing screen and a display device having the same, which can improve at least one of the above technical problems.

[0005] On the one hand, the present application provides a splicing light board, and the splicing light board includes a plurality of light board units;

[0006] Each light board unit includes a PCB board, a plurality of LEDs, and a packaging structure; the PCB board includes a first surface and a second surface arranged opposite to each other, the plurality of LEDs are arranged in an array on the first surface, each LED is electrically connected to the PCB board respectively, and the packaging structure is arranged on the first surface and wraps the LED;

[0007] The second surfaces of each PCB board are arranged on the same side, and the second surfaces of adjacent PCB boards are welded and / or bonded.

[0008] In a possible implementation manner of the present application, the splicing light board further includes welding blocks, and the welding blocks are respectively welded to the second surfaces of adjacent PCB boards.

[0009] In a possible implementation manner of the present application, a welding area is provided at the edge of the second surface, and each of the welding blocks is welded to the welding area of the adjacent PCB board respectively.

[0010] In a possible implementation manner of the present application, a copper layer is provided in the welding area, and the welding block is formed after the hardening of liquid tin.

[0011] In a possible implementation manner of the present application, a plurality of welding areas are provided at the edge of the second surface, and the plurality of welding areas are arranged at intervals along the edge of the second surface.

[0012] In a possible implementation manner of the present application, the spliced light board further includes an adhesive layer, the adhesive layer is arranged at the splicing position of two adjacent PCB boards, and the adhesive layer is adhered to the second surface of the adjacent PCB boards respectively.

[0013] In a possible implementation manner of the present application, the orthographic projection of the light board unit is square, and the orthographic projection of the spliced light board is square.

[0014] In a possible implementation manner of the present application, the LED includes at least one of MINI-LED and Micro-LED.

[0015] In a possible implementation manner of the present application, the encapsulation structure is a film, the film wraps the LED, and a plurality of the films are located on the same plane.

[0016] The second aspect of the present application provides a display device, the display device includes a box body and the spliced light board as described above, and the spliced light board is fixed on the box body.

[0017] Beneficial effects:

[0018] The spliced light board in the present application includes a plurality of light board units. Due to the welding and / or adhesion of the second surfaces of the adjacent PCB boards, the plurality of light board units in the present application are connected into an integral structure, thereby avoiding the need to individually install the light board units on the box body when assembling the display device, which is beneficial to improving the installation efficiency of the display device. In addition, the plurality of light board units in the present application have been connected into an integral structure before assembling the display device. By controlling the processing precision of the light board, the splicing gaps between the light board units can be significantly improved or eliminated, which reduces the requirement for the processing precision of the box body compared with the prior art, is beneficial to reducing the production cost, and improving the production efficiency. Description of the drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0020] Figure 1 Schematic structural diagram of an embodiment of the display device provided by the present application;

[0021] Figure 2 Schematic structural diagram of an embodiment of the box body provided by the present application;

[0022] Figure 3 Schematic structural diagram of an embodiment of the lamp board unit provided by the present application;

[0023] Figure 4 Schematic structural diagram of an embodiment of the spliced lamp board provided by the present application.

[0024] Reference numerals in the drawings:

[0025] 100, display device; 110, light box; 111, positioning post; 120, spliced lamp board; 121, lamp board unit; 1211, display surface; 1212, non-display surface; 1212a, welding area. Detailed implementation manners

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0029] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or instance". Any embodiment described as "exemplary" in this application is not necessarily to be construed as more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the present invention. In the following description, details are set forth for the purpose of explanation. It should be understood that those of ordinary skill in the art can recognize that the present invention can be practiced without these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of the present invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed in this application.

[0030] With the development of display technology, the demand for various extra-large display devices is increasing day by day, and their applications in various scenarios are becoming more and more extensive. Currently, most large LED display screens are composed of multiple display devices spliced together. The display device includes a box body and a plurality of LED lamp boards. The LED lamp board is mainly composed of a PCB board and a large number of lamp beads soldered on the PCB board, and the display is performed through the lamp beads.

[0031] Limited by the production process, the size of the LED lamp board is much smaller than that of the box body. For example, 8 lamp boards are provided on each box body, and the 8 lamp boards are arranged in a 2-row and 4-column array on the box body; another example is that 16 lamp boards are provided on each box body, and the 16 lamp boards are arranged in a 4-row and 4-column array on the box body (). In the related art, in order to fix the lamp board on the box body, generally a plurality of positioning posts are arranged in the box body, and the plurality of positioning posts divide the installation surface on the box body into a plurality of lamp board installation areas (the number of lamp board installation areas is the same as the number of lamp boards). When assembling the display device, it is necessary to align each lamp board with the positioning posts on the corresponding lamp board installation area to achieve the positioning and fixing of the lamp board (for example, each lamp board is magnetically fixed to the positioning posts on the corresponding lamp board installation area), resulting in a cumbersome assembly process. In addition, in the related art, it is necessary to strictly control the processing accuracy of the positioning posts and the lamp board units in order to make the splicing gap between two adjacent lamp boards fixed in the box body smaller, resulting in high processing costs, great leveling difficulty, and it is difficult to completely eliminate the splicing gap problem.

[0032] It should be emphasized that in order to improve the impact resistance and load-bearing performance of a display device, the existing box body is generally a metal part. Multiple positioning posts are provided inside the box body to support and fix the lamp board unit. The number of positioning posts inside the box body varies depending on the sizes of the box body and the lamp board unit. Generally, there are 50 to 200 positioning posts inside the box body. In order to reduce the splicing gap between two adjacent lamp board units, it is necessary to strictly control the machining accuracy of the multiple positioning posts so that the bearing surfaces of the multiple positioning posts are on the same plane, resulting in high machining accuracy of the box body, low production efficiency, and high costs.

[0033] Taking the Micro-LED splicing screen as an example, at present, a large part of the display effect of the Micro-LED splicing screen depends on the flatness of the splicing of the display surface of the lamp board (that is, the side of the lamp board where the LED array is provided) and the splicing gap. The flatter the display surfaces of adjacent lamp boards and the more aligned their edges are, the smaller the splicing gap will be, and the better the picture display effect will be. The flatness of the display surface of the lamp board depends on the height consistency of the lamp board support points (that is, the positioning posts inside the box body) on the box body, and is fixed and maintained in a flat state by magnetic adsorption on the box body. The height consistency of the lamp board support points on the box body, that is, the flatness, is the biggest difficulty in the machining of the box body. At present, the flatness tolerance of CNC machining is controlled within 80 microns. The smaller this tolerance range is, the lower the yield rate of the box body will be, and the cost will increase significantly. In addition to the machining tolerance of the lamp board itself, the size of the splicing gap between the lamp boards also depends on the operation level of the lamp board assembly workers. At present, the size tolerance of a single lamp board is controlled between +2 microns and -3 microns, and the lamp board splicing gap caused by the tolerance has been controlled to be very small. However, the lamp boards on the display screen are all spliced piece by piece by the operators. The larger the display area, the more lamp boards need to be spliced. Coupled with the differences in operation levels, the gaps caused by the misalignment of adjacent lamp boards will be larger.

[0034] In view of the above technical problems in the prior art, the embodiments of the present application provide a spliced lamp board, thereby reducing the installation efficiency of a display device having the spliced lamp board, improving or eliminating the splicing gap between lamp board units, reducing the requirements for the machining accuracy of the box body, reducing production costs, and improving production efficiency. The spliced lamp board and display device in the present application will be further described below with specific embodiments.

[0035] Please refer to Figures 1 to 4 , the embodiments of the present application provide a display device 100, and the display device 100 includes a box body and a spliced lamp board 120. Among them, the spliced lamp board 120 is used to display information, and the lamp box 110 is used to install and fix the spliced lamp board 120.

[0036] Specifically, please refer to Figure 1 and Figure 2, the light box 110 is generally an open square structure. A plurality of positioning posts 111 are provided inside the light box 110, and the plurality of positioning posts 111 are generally distributed in a grid pattern inside the light box 110. The plurality of positioning posts 111 are generally arranged in N rows and M columns inside the light box 110, where N and M are integers greater than 2. The positioning posts 111 are used to support and fix the spliced light board 120.

[0037] Exemplarily, a first magnetic member is provided on each positioning post 111, and a second magnetic member is provided at a position on the spliced light board 120 opposite to the first magnetic member. The spliced light board 120 is fixed on the plurality of positioning posts 111 through the magnetic attraction cooperation of the first magnetic member and the second magnetic member. It should be noted that the specific structure of the light box 110 and the fixing manner of the spliced light board 120 on the light box 110 do not belong to the main improvement points of this application and will not be further elaborated here.

[0038] In some embodiments of this application, please refer to Figure 1 , Figure 3 and Figure 4 , the spliced light board 120 includes a plurality of light board units 121. Each of the light board units 121 includes a PCB board, a plurality of LEDs, and a packaging structure. The PCB board includes a first surface and a second surface which are oppositely arranged. The plurality of LEDs are arranged in an array on the first surface, and each LED is electrically connected to the PCB board. The packaging structure is arranged on the first surface and wraps the LEDs. The second surfaces of each PCB board are arranged on the same side, and the second surfaces of adjacent PCB boards are welded and / or bonded. That is, the plurality of light board units 121 form an integral structure through welding and / or bonding of the second surfaces.

[0039] It should be noted that the PCB board is generally in a thin plate-like structure. The first surface and the second surface are two large-sized surfaces oppositely arranged on the PCB board. The plurality of LEDs are arranged in an array on the first surface. That is, the first surface can also be called the display surface 1211 of the light board unit 121. The second surface is oppositely arranged to the first surface, and the second surface can also be called the non-display surface 1212 of the light board unit 121.

[0040] It can be understood that the spliced light board 120 in the present application includes multiple light board units 121. Due to welding and / or bonding on the second surface of the adjacent PCB boards, multiple light board units 121 in the present application are connected into an integral structure, thus avoiding the need to individually install and fix the light board units 121 on the box body when assembling the display device 100, which is beneficial to improving the installation efficiency of the display device 100. When using a larger integral (spliced) light board for installation operations, the assembly efficiency will also be greatly improved, and the splicing seams will be significantly reduced, resulting in a better display effect. In addition, multiple light board units 121 in the present application have been connected into an integral structure before assembling the display device 100. By controlling the processing accuracy of the light board, the splicing gaps between the light board units 121 can be significantly improved or eliminated. Compared with the prior art where it is necessary to strictly control the processing accuracy of the positioning posts 111 and the light board units 121 to reduce the splicing gaps between two adjacent light boards, the embodiment of the present application reduces the requirements for the processing accuracy of the box body, which is beneficial to reducing production costs and improving production efficiency. Specifically, the size of each light board unit 121 is the same or similar, and is generally square. In this way, it is convenient for the preparation and splicing of the light board units 121.

[0041] Specifically, as Figure 3 shown, the orthographic projection of the light board unit 121 is square. As Figure 4 shown, the spliced light board 120 is formed by splicing eight light board units 121. The eight light board units 121 are arranged in two rows and four columns, and the orthographic projection of the eight light board units 121 is square. The area of the orthographic projection of the spliced light board 120 is an integer multiple of the area of the orthographic projection of the light board unit 121. Taking Figure 3 and Figure 4 as an example, the area of the orthographic projection of the spliced light board 120 is eight times the area of the orthographic projection of the light board unit 121.

[0042] Specifically, the side of the light board unit 121 provided with the encapsulation structure is a plane, that is, the display surface 1211 of the light board unit 121 is a plane. For example, the encapsulation structure is a film, and the film wraps the LED, and multiple films are on the same plane.

[0043] Specifically, the LED includes at least one of MINI-LED and Micro-LED. MINI-LED and Micro-LED have a smaller size, and the number of LEDs that can be arrayed per unit area is relatively large, which is beneficial to improving the brightness and resolution of the display device 100.

[0044] Specifically, when assembling the spliced light board 120, a reference plane can be selected first, and the display surface 1211 of each light board unit 121 is oriented towards the reference plane and attached to the reference plane. The multiple light board units 121 are arranged in a preset array. For example, as Figure 4As shown, multiple lamp board units 121 are arranged in two rows and four columns. Then, glue and / or solder is applied at the joint of the second surfaces of two adjacent PCB boards. After the glue and / or solder hardens, the multiple lamp board units 121 can be connected into an integral structure.

[0045] In some embodiments of the present application, the spliced lamp board 120 further includes welding blocks (not shown in the figure), and the welding blocks are respectively welded to the second surfaces of the adjacent PCB boards. In this embodiment, by welding the welding blocks to the second surfaces of the adjacent PCB boards respectively, it is beneficial to improve the connection strength between two adjacent lamp boards.

[0046] Exemplarily, the welding blocks can be formed by the hardening of solder. Among them, the solder can be metal solder. Specifically, the metal solder includes but is not limited to stainless steel solder, tin solder, copper solder, gold solder, etc. The metal solder can be formed by melting the corresponding solid metal into liquid metal at high temperature.

[0047] Exemplarily, a welding area 1212a is provided at the edge of the second surface, and each welding block is respectively welded to the welding area 1212a of the adjacent PCB board (or lamp board unit 121). Specifically, as Figure 3 shown, before welding the adjacent PCB boards, the insulating layer of the welding area 1212a can be removed by laser, so that the copper substrate covered by the insulating layer of the welding area 1212a is exposed. Then, metal solder is applied to the adjacent welding areas 1212a of the adjacent PCB boards. After the applied metal solder hardens, the adjacent two PCB boards can be connected into an integral structure, and the metal solder forms the welding blocks described above after hardening.

[0048] Furthermore, a copper layer is provided in the welding area 1212a (for example, the copper substrate exposed after removing the insulating layer of the welding area 1212a forms a copper layer), and the welding blocks are formed after the hardening of liquid tin. It can be understood that since the hardened tin and copper have a strong interfacial bonding force, it is beneficial to further improve the connection force between two adjacent lamp board units 121.

[0049] In some embodiments of the present application, a plurality of welding areas 1212a are provided at the edge of the second surface, and the plurality of welding areas 1212a are arranged at intervals along the edge of the second surface. Exemplarily, the plurality of welding areas 1212a are arranged at intervals along the same splicing edge, which is beneficial to increasing the connection area between two adjacent PCB boards. Another exemplarily, the plurality of welding areas 1212a are respectively arranged at intervals along different splicing edges, which is beneficial to splicing the PCB boards in different directions and is beneficial to increasing the flexible selection of the splicing directions of the PCB boards.

[0050] In some embodiments of the present application, the spliced light board 120 further includes an adhesive layer, which is disposed at the splicing position of two adjacent PCB boards, and the adhesive layer is adhesively bonded to the second surfaces of the adjacent PCB boards respectively. In this way, by providing an adhesive layer at the splicing position of two adjacent PCB boards, and the adhesive layer is adhesively bonded to the second surfaces of the adjacent PCB boards respectively, the two adjacent PCB boards to be bonded are integrally structured by the adhesive layer simultaneously bonding to the adjacent PCB boards. Of course, in some other embodiments of the present application, an adhesive layer may also be covered on the second surface of each PCB board, so that multiple light board units 121 are connected into an integral structure through the same adhesive layer, which is not limited herein.

[0051] Specifically, the adhesive layer may be formed after the glue is hardened. The glue may be a glue with a relatively high hardness after hardening, such as epoxy resin glue, polypropylene glue, etc., which is not limited herein.

[0052] Exemplarily, when assembling the spliced light board 120 in the present application, the splicing methods designed for several light board units to be spliced can be laid on a flat equipment tabletop (for example, the equipment tabletop is a flat horizontal tabletop with vacuum adsorption holes arranged in an array), and the display surface of each light board unit faces downwards (that is, the first surface faces the equipment tabletop). The display surface of the light board is adsorbed through the vacuum adsorption holes on the equipment tabletop, so that the display surface of the light board is completely attached to the equipment tabletop. Then, the adjacent light board units are pushed to be seamless by the X-axis and Y-axis pneumatic sliders on the adsorption platform, and then soldered or fixed with glue, so that multiple light board units are combined into a larger integral light board (screen) after being soldered or fixed with glue.

[0053] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For the parts not detailed in a certain embodiment, reference may be made to the detailed descriptions of other embodiments above, which will not be elaborated herein.

[0054] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only an example and does not constitute a limitation to the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to the present application. Such modifications, improvements, and corrections are proposed in the present application, so such modifications, improvements, and corrections still fall within the spirit and scope of the exemplary embodiments of the present application.

[0055] Meanwhile, this application uses specific terms to describe the embodiments of this application. For example, "an embodiment", "one embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0056] Similarly, it should be noted that, in order to simplify the description of this application disclosure and thus help understand one or more embodiments of the invention, in the foregoing description of the embodiments of this application, sometimes multiple features are grouped into one embodiment, drawing, or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than those mentioned in the claims. In fact, the features of the embodiment are fewer than all the features of the single embodiment disclosed above.

[0057] In some embodiments, numbers are used to describe the components and the quantity of attributes. It should be understood that such numbers used for the description of embodiments are modified by the modifiers "about", "approximately", or "substantially" in some examples. Unless otherwise specified, "about", "approximately", or "substantially" indicate that the numbers allow a variation of ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, and this approximate value can change according to the characteristics required by individual embodiments. In some embodiments, the numerical parameters should consider the specified significant digits and adopt the method of retaining the general number of digits. Although the numerical ranges and parameters used to confirm the breadth of the scope in some embodiments of this application are approximate values, in specific embodiments, such numerical settings are as precise as possible within the feasible range.

[0058] The above has introduced the embodiments of this application in detail. Specific examples are used herein to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A spliced light board, characterized in that, The spliced light board includes a plurality of light board units; Each of the light board units includes a PCB board, a plurality of LEDs, and a packaging structure; the PCB board includes a first surface and a second surface arranged opposite to each other, the plurality of LEDs are arranged in an array on the first surface, each of the LEDs is electrically connected to the PCB board, and the packaging structure is arranged on the first surface and wraps the LEDs; The second surfaces of each of the PCB boards are arranged on the same side, and the second surfaces of adjacent PCB boards are welded and / or adhered.

2. The spliced light board according to claim 1, characterized in that, The spliced light board further includes welding blocks, and the welding blocks are respectively welded to the second surfaces of adjacent PCB boards.

3. The spliced light board according to claim 2, wherein Welding areas are provided at the edges of the second surface, and each of the welding blocks is respectively welded to the welding areas of the adjacent PCB boards.

4. The spliced light board according to claim 3, wherein Copper layers are provided in the welding areas, and the welding blocks are formed after the hardening of liquid tin.

5. The spliced light board according to claim 3, characterized in that, A plurality of welding areas are provided at the edges of the second surface, and the plurality of welding areas are arranged at intervals along the edges of the second surface.

6. The spliced light board according to claim 1, wherein The spliced light board further includes an adhesive layer, and the adhesive layer is arranged at the splicing position of two adjacent PCB boards, and the adhesive layer is respectively adhered to the second surfaces of the adjacent PCB boards.

7. The spliced light board according to claim 1, wherein The orthographic projection of the light board unit is square, and the orthographic projection of the spliced light board is square.

8. The spliced light board according to claim 1, wherein, The LED includes at least one of MINI-LED and Micro-LED.

9. The spliced light board according to claim 1, characterized in that, The packaging structure is a film, the film wraps the LEDs, and the plurality of films are on the same plane.

10. A display device, characterized in that, The display device includes a box body and the spliced light board according to any one of claims 1 to 9, and the spliced light board is fixed on the box body.

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