An ultra-fine pitch outdoor COB module

Abstract

The utility model relates to an ultra-small pitch outdoor COB module, comprising a shell and an array drive board, wherein one side of the shell is provided with a plurality of placement surfaces, a plurality of array drive boards are arranged on the placement surfaces, a glue storage groove is arranged in the placement surface, and an adhesive is arranged in the glue storage groove; an observation window is arranged in the placement surface; the utility model can open the back cover without disassembling the array drive board and the shell, and carry out maintenance and replacement of main components, and the sealing is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of display screens, in particular to an ultra-small pitch outdoor COB module. Background Art

[0002] 1. At present, most outdoor LED display modules use outdoor waterproof light-emitting tubes, and the front light-emitting tube pins and the back IC surface are all potted with silicone. Although the silicone potting method can achieve the IP65 protection level, this process also has two problems:

[0003] 1. The display light board of the traditional module uses the SMD process to mount the light-emitting tube on the surface of the PCB board. As the dot pitch becomes smaller and smaller, smaller light-emitting tubes and more precise patch processes are required. Affected by the current level of light-emitting tube manufacturing technology, the size of the light-emitting tube has reached a bottleneck.

[0004] 2. All components on the back are sealed with sealant, which is costly and difficult to repair.

[0005] Second, the light board using GOB technology, this solution is also the same as the traditional module display light board, which uses SMD technology to mount the light-emitting tube on the surface of the PCB board, and then the light-emitting surface of the light board is coated with glue and trimmed. As the dot pitch becomes smaller and smaller, smaller light-emitting tubes and more precise patch technology are required. Due to the current level of light-emitting tube manufacturing technology, it is impossible to manufacture ultra-small pitch GOB modules. Utility Model Content

[0006] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0007] In view of the following technical problems in the prior art: all components on the back of the array driver board in the prior art are sealed with sealant, which is costly and difficult to repair.

[0008] In order to solve the above technical problems, the utility model provides the following technical solutions: an ultra-fine pitch outdoor COB module, comprising:

[0009] A shell and an array drive plate, wherein one side of the shell is provided with a plurality of placement surfaces, a plurality of the array drive plates are arranged on the placement surfaces, a glue storage groove is arranged in the placement surface, and an adhesive is arranged in the glue storage groove; an observation window is arranged in the placement surface.

[0010] As an optimal technical solution for an ultra-fine pitch outdoor COB module, an avoidance groove is provided in the placement surface.

[0011] As a preferred technical solution for an ultra-fine pitch outdoor COB module, a first protruding rib is provided on the other side of the shell.

[0012] As an optimal technical solution for an ultra-fine pitch outdoor COB module, an adapter board is fixed on the back of the shell and connected to the area array driver board.

[0013] As an optimal technical solution for an ultra-fine pitch outdoor COB module, it also includes a back cover, a sealing ring is provided on one side of the back cover, and the back cover is fixedly connected to the other side of the shell.

[0014] As a preferred technical solution for an ultra-fine pitch outdoor COB module, a second protruding rib is provided on one side of the back cover, and the second protruding rib is in contact with the first protruding rib.

[0015] As a preferred technical solution for an ultra-fine pitch outdoor COB module, heat dissipation ribs are provided on the other side of the back cover corresponding to the second protruding rib position.

[0016] The beneficial effects of the utility model are as follows: the utility model can open the rear cover to repair and replace the main components without disassembling the array drive board and the shell, and the sealing is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0018] Figure 1 It is a schematic diagram of the overall explosion structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall assembly structure of the utility model;

[0020] Figure 3 It is a front structural schematic diagram of the housing in the utility model;

[0021] Figure 4 This is a schematic diagram of the back structure of the housing in the utility model;

[0022] Figure 5 This is a schematic diagram of the front structure of the rear cover of the utility model;

[0023] Figure 6It is a schematic diagram of the back structure of the rear cover in the utility model.

[0024] Figure numerals: glue storage slot 4, observation window 5, placement surface 3, avoidance groove 6, adapter plate 8, array drive plate 2, sealing ring 10, shell 1, second protruding rib position 11, first protruding rib position 7, back cover 9, heat dissipation rib 12. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0028] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0029] Example 1

[0030] Reference Figure 1 to Figure 6 The present embodiment provides an ultra-fine pitch outdoor COB module, including a shell 1 and an array driver board 2. A plurality of placement surfaces 3 are provided on one side of the shell 1, and a plurality of array driver boards 2 are arranged on the placement surface 3. A glue storage groove 4 is provided in the placement surface 3, and an adhesive is provided in the glue storage groove 4; an observation window 5 is provided in the placement surface 3.

[0031] Furthermore, the shell 1 is shaped like a square plate structure with regular gaps and projections and depressions. The regular gaps are specifically a hole groove structure in which a number of placement surfaces 3 and observation windows 5 are evenly distributed in an array form on the plate. In this embodiment, an arrangement of four rows and two columns is adopted, which is divided by three horizontal grooves and one vertical groove to form 8 placement surfaces 3, corresponding to which 8 area array driving boards 2 are placed. LED lights are arranged on one side of the area array driving board 2, and components are arranged on the other side.

[0032] The structure of the housing 1 is as follows Figure 3 and 4 As shown, the whole is made of high-strength aluminum alloy die-casting, and the shell is precision-machined by CNC four-axis secondary processing. Its dimensional tolerance can reach plus or minus 0.05mm, which truly meets the precision requirements of high-density and small-pitch products.

[0033] The housing 1 is divided into placement surfaces 3 by equally dividing transverse and longitudinal long groove structures, and the glue storage groove 4 is arranged near the edge of the placement surface 3. The housing 1 and the array drive board 2 are bonded and sealed by an adhesive; the adhesive can be a polymer resin glue.

[0034] An avoidance groove 6 is provided in the placement surface 3 .

[0035] The avoidance groove 6 is used to avoid components on the array driving board 2 .

[0036] A first protruding rib 7 is disposed on the other side of the housing 1 .

[0037] The first protruding rib 7 includes rib block plates at the four corners, a rib block plate at the center, and rib block plates on the upper and lower sides of the center, which are used to absorb and transfer the heat emitted by the array drive plate 2, transfer the heat to the second protruding rib 11, and dissipate the heat through the heat dissipation ribs 12.

[0038] An adapter plate 8 is fixed on the back of the housing 1 and connected to the array drive plate 2 .

[0039] The adapter board 8 is used to connect the array drive boards 2 of a single module and control it as a whole. The module of the present application can be fixed on the box as a whole by magnetic attraction, and together with other modules, it forms a display screen. The adapter board 8 is also connected to the main control of the box.

[0040] The array drive board 2 and the shell 1 are bonded and sealed by polymer resin glue. A glue storage groove 4 and a heat dissipation base surface (placing surface 3) are designed inside the shell 1. After the resin glue inside the glue storage groove 4 is cured, the purpose of front waterproofing can be effectively achieved. The heat dissipation base surface is in contact with the light board, and most of the heat generated by the light board can be exported to the shell, which not only ensures the flatness of the light board but also achieves a firm sealing effect.

[0041] The housing 1 further comprises a rear cover 9 , a sealing ring 10 is disposed on one side of the rear cover 9 , and the rear cover 9 is fixedly connected to the other side of the housing 1 .

[0042] A second protruding rib 11 is provided on one side of the rear cover 9 , and the second protruding rib 11 is in contact with the first protruding rib 7 .

[0043] The second protruding rib position 11 corresponds to the first protruding rib position 7 .

[0044] A heat dissipation rib 12 is provided on the other side of the rear cover 9 corresponding to the second protruding rib position 11 .

[0045] The back cover 9 has a second protruding rib 11 inside that contacts the first protruding rib 7 of the housing 1, which can effectively conduct heat from the housing 1; a plurality of heat dissipation ribs 12 are cleverly arranged on the back, which can quickly dissipate the heat of the back cover 9 into the air. Secondly, the heat dissipation ribs 12 can prevent the back cover from shrinking and breaking, eliminate deformation, and enhance the strength and rigidity of the back cover.

[0046] High-precision positioning pins are designed at the places where the shell and the back cover fit together, as well as where the back cover and the box fit together, so that they can be accurately assembled into finished modules to ensure the high precision of the module display effect. I will not go into details.

[0047] A sealing ring 10 is used between the back cover 9 and the shell 1 to prevent water leakage, and is efficient and durable. After removing the back cover 9, the vulnerable components on the IC surface of the lamp board can be repaired through the maintenance window observation window 5 reserved in the shell 1, eliminating the tedious process of removing the potting glue, thereby improving efficiency and reducing costs.

[0048] Specific implementation methods and steps of this application:

[0049] 1. The light-emitting surface of the array driver board 2 uses the COB packaging process, which not only ensures that the front light-emitting chip is not easily damaged, but also plays a waterproof role for the front light-emitting chip. It is bonded to the housing 1 through polymer resin glue, which effectively seals the internal components and effectively ensures the flatness of the driver board surface.

[0050] 2. The shell 1 has an inspection window at the main components of the array driver board 2, so that the main components on the IC surface of the array driver board can be repaired and replaced through the inspection window later.

[0051] 3. The housing 1 and the back cover 9 are fixed by screws and sealed by a sealing ring 10 to achieve effective waterproofing. To repair the IC components of the array driver board or to repair and replace the adapter board 8, you only need to remove the back cover 9.

[0052] 4. The back of the array driver board 2 is closely attached to the shell 1 over a large area. The shell 1 contacts the second protruding ribs 11 of the rear cover over a large area through its first protruding ribs 7, which effectively conducts away the heat of the array driver board 2 and prolongs the service life of the lamp board.

[0053] 5. The array drive board 2 and the housing 1, and the housing 1 and the back cover 9 are all limited by positioning pins, which effectively improves the assembly positioning accuracy.

[0054] 6. The module of this application is provided with a magnetic core that is attracted to the iron core on the box through magnetic force to form the outermost magnetic attraction structure. A new type of external threaded magnetic steel seat is used, which is connected to the threaded hole column on the back cover through external threads. The magnetic core is embedded in the slot on the magnetic steel seat. The magnetic force here is 300MT, which is moderate and easy to disassemble and assemble quickly. The NdFeB magnetic core can also be used as a whole, and the countersunk hole in the middle is fixed to the box through countersunk screws, which can also realize the magnetic attraction structure; no more details will be given.

[0055] 7. When the module needs to be repaired, the module that needs maintenance can be sucked out through the vacuum suction cup, and then the module can be installed through the suction cup or by hand, so that front maintenance can be carried out; maintenance is convenient.

[0056] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An ultra-fine pitch outdoor COB module, characterized by: include, A shell (1) and an array drive plate (2), wherein a plurality of placement surfaces (3) are provided on one side of the shell (1), a plurality of the array drive plates (2) are arranged on the placement surface (3), a glue storage groove (4) is provided in the placement surface (3), and an adhesive is provided in the glue storage groove (4); and an observation window (5) is provided in the placement surface (3).

2. The ultra-fine pitch outdoor COB module according to claim 1, characterized in that: An avoidance groove (6) is provided in the placement surface (3).

3. The ultra-fine pitch outdoor COB module according to claim 1 or 2, characterized in that: A first protruding rib (7) is provided on the other side of the shell (1).

4. The ultra-fine pitch outdoor COB module according to claim 3, characterized in that: An adapter plate (8) is fixed on the back of the housing (1) and is connected to the area array drive plate (2).

5. The ultra-fine pitch outdoor COB module according to claim 4, characterized in that: It also comprises a rear cover (9), one side of which is provided with a sealing ring (10), and the rear cover (9) is fixedly connected to the other side of the housing (1).

6. The ultra-fine pitch outdoor COB module according to claim 5, characterized in that: A second protruding rib (11) is provided on one side of the rear cover (9), and the second protruding rib (11) is in contact with the first protruding rib (7).

7. The ultra-fine pitch outdoor COB module according to claim 6, characterized in that: A heat dissipation rib (12) is provided on the other side of the rear cover (9) at a position corresponding to the second protruding rib position (11).

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