A fully outdoor miniLED high-definition display screen

Abstract

An all-outdoor miniLED high-definition display screen includes a PCB board, a frame, and encapsulating adhesive. The frame has support portions on its four edges facing the PCB board, which abut against the surface of the PCB board. An axial groove is formed along the side of the support portion facing the PCB board, the bottom of which is arc-shaped. A long groove is formed on one side of the groove, one side of which communicates with the groove, and the other side communicates with the outer wall of the support portion. The encapsulating adhesive covers the side wall of the frame in a surrounding manner. While adhering to the side wall, a portion of the encapsulating adhesive also adheres to protrusions on the sealant. Therefore, even if cracks occur at the point where the encapsulating adhesive adheres to the side wall of the frame, moisture will be blocked at the point where the encapsulating adhesive adheres to the protrusions, thereby further improving the airtightness of the display screen and enabling it to meet all-outdoor protection requirements.

Description

Technical Field

[0001] This utility model relates to the field of sealing technology for outdoor displays, and in particular to a fully outdoor miniLED high-definition display. Background Technology

[0002] With the rapid development of MiniLED technology, its application fields are becoming wider and wider. Due to its unique advantages such as high contrast, high brightness and long life, it is favored by the market. However, at present, most of the products are used indoors, such as shopping malls, conference rooms, monitoring rooms and private cinemas. However, the demand for advertising in outdoor public places is also rapidly expanding the need for small-pitch products. Therefore, various peers are actively investing in research and development and testing for outdoor applications, presenting a situation of fierce competition.

[0003] However, existing traditional indoor MiniLED displays will face many challenges if used outdoors, such as high temperature, rain, dust, ultraviolet radiation and other complex environmental factors. These factors can easily cause the encapsulation glue to crack, resulting in a series of serious problems inside the module, such as LED solder joint oxidation, optical performance degradation, electrical corrosion and leakage safety, which cannot meet the protection requirements for outdoor use. Summary of the Invention

[0004] In view of this, the present invention provides an all-outdoor miniLED high-definition display screen to solve the above problems.

[0005] An all-outdoor miniLED high-definition display screen includes a PCB board, a frame disposed on the back of the PCB board, and an encapsulating adhesive covering the PCB board. The four edges of the frame have support portions facing the PCB board, which abut against the surface of the PCB board. An axial groove is formed along the side of the support portion facing the PCB board, the bottom of which is arc-shaped. An elongated groove is formed on one side of the groove, one side of which communicates with the groove, and the other side communicates with the outer wall of the support portion. Sealant is present in the groove, one side of which extends through the elongated groove and protrudes from the frame to form a protrusion, which is bonded to the encapsulating adhesive.

[0006] Furthermore, a number of LED beads are arranged at intervals on the side of the PCB board away from the frame.

[0007] Furthermore, the frame is mounted on the PCB board away from the side containing the LED by screws.

[0008] Furthermore, the PCB board is coated with potting compound at the locations where the components are located.

[0009] Furthermore, the encapsulating adhesive is applied to the side of the PCB board with the LED beads and covers the side wall of the frame in a surrounding manner.

[0010] Furthermore, the encapsulating adhesive covers the middle position of the frame sidewall and has a concave arc transition.

[0011] Furthermore, the PCB board is made of insulating material and has a conductive copper foil pattern laid on its surface.

[0012] Compared with existing technologies, the fully outdoor miniLED high-definition display screen provided by this utility model fills the inner groove with excess sealant and then mounts the frame on the PCB board, causing the sealant to be squeezed out of the long groove, thus forming a protrusion. The encapsulating adhesive covers the side wall of the frame in a surrounding manner. In this way, while the encapsulating adhesive adheres to the side wall of the frame, part of it also adheres to the protrusion on the sealant. Thus, even if cracks occur at the point where the encapsulating adhesive adheres to the side wall of the frame, moisture will be blocked at the point where the encapsulating adhesive adheres to the protrusion, thereby further improving the sealing performance of the display screen and enabling it to meet the requirements for full outdoor protection. Attached Figure Description

[0013] Figure 1 A schematic diagram of the structure of the all-outdoor miniLED high-definition display screen provided by this utility model.

[0014] Figure 2 for Figure 1 Enlarged diagram of point A in the middle. Detailed Implementation

[0015] The specific embodiments of this utility model are described in further detail below. It should be understood that the description of the embodiments of this utility model herein is not intended to limit the scope of protection of this utility model.

[0016] like Figure 1 The diagram shown is a structural schematic of the all-outdoor miniLED high-definition display screen provided by this utility model. The all-outdoor miniLED high-definition display screen includes a PCB board 10, a frame 20 disposed on the back of the PCB board 10, and an encapsulating adhesive 30 covering the PCB board 10. It is conceivable that the all-outdoor miniLED high-definition display screen also includes other functional modules, such as signal modules, power modules, etc., which are technologies known to those skilled in the art and will not be described in detail here.

[0017] The PCB board 10 is made of insulating material and has a conductive copper foil pattern laid on its surface to form electrical connections between electronic components. A plurality of LED beads 11 are arranged at intervals on the side of the PCB board 10 away from the frame 20 for dynamic color display and illumination of the device.

[0018] Please see Figure 2 The frame 20 is screwed onto the side of the PCB board 10 away from the side containing the LED beads 11. Each of the four edges of the frame 20 has a support portion 21 facing the PCB board 10, which abuts against the surface of the PCB board 10. An inner groove 22 is formed on the end face of the support portion 21 facing the PCB board 10, and the bottom of the inner groove 22 is arc-shaped. A long groove 23 is formed on one side of the inner groove 22, one side of which communicates with the inner groove 22, and the other side communicates with the outer wall of the support portion 21. Thus, when the frame 20 is mounted on the PCB board 10, the presence of the inner groove 22 and the long groove 23 reduces the contact area between the frame 20 and the PCB board 10, thereby facilitating air expulsion between the support portion 21 and the PCB board 10, allowing the support portion 21 and the PCB board 10 to fit together as closely as possible.

[0019] During installation, when an excess of sealant 40 is poured into the inner groove 22 and the frame 20 is mounted on the PCB board 10, one side of the support portion 21 abuts against the surface of the PCB board 10. The sealant 40 in the inner groove 22 is squeezed into the elongated groove 23 under pressure and flows through the groove 23 to the outside of the frame 20. After the sealant 40 solidifies, one side of it protrudes from the frame 20, forming a protrusion 41. This protrusion 41 can cooperate with the encapsulating adhesive 30, thereby further improving the module's sealing performance. The specific cooperation will be explained below.

[0020] It is conceivable that if the frame 20 is not a fully enclosed structure, then the back of the PCB board 10 has the location of electronic components, that is, the side of the PCB board 10 away from the lamp bead 11 is coated with potting compound to ensure the sealing of the electronic components on the back of the PCB board 10.

[0021] The encapsulating adhesive 30 is an adhesive used for sealing and protecting electronic components. While protecting the electronic components, it also maintains their visibility. The encapsulating adhesive 30 is applied to the side of the PCB board 10 where the LED beads 11 are located, and it surrounds the side wall of the frame 20. While the encapsulating adhesive 30 adheres to the side wall of the frame 20, a portion of it also adheres to the protrusions 41 on the sealant 40. Thus, even if cracks occur at the point where the encapsulating adhesive 30 is bonded to the side wall of the frame 20, moisture will be blocked at the bonding point, further improving the sealing performance of the display screen and enabling it to meet all-outdoor protection requirements. Preferably, the encapsulating adhesive 30 covers the middle of the side wall of the frame 20 with a concave arc transition, thereby increasing the height of the encapsulating adhesive 30 covering the side wall of the frame 20, increasing the path for moisture penetration along the interface, making it less likely for moisture to penetrate the PCB board 10, and improving sealing performance.

[0022] Compared with the prior art, the fully outdoor miniLED high-definition display screen provided by this utility model fills the inner groove 22 with excess sealant 40, and then installs the frame 20 on the PCB board 10, so that the sealant is squeezed out of the long groove 23, thereby forming a protrusion 41. The encapsulating adhesive 30 covers the side wall of the frame 20 in a surrounding manner. In this way, while the encapsulating adhesive 30 is bonded to the side wall of the frame 20, part of it will also bond to the protrusion 41 on the sealant 40. Thus, even if the area where the encapsulating adhesive 30 is bonded to the side wall of the frame 20 cracks, moisture will be blocked at the bonding area between the encapsulating adhesive 30 and the protrusion 41, thereby further improving the sealing performance of the display screen and enabling it to meet the requirements of full outdoor protection.

[0023] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions or improvements within the spirit of the present utility model are covered within the scope of the claims of the present utility model.

Claims

1. A fully outdoor miniLED high-definition display screen, characterized in that: The all-outdoor miniLED high-definition display screen includes a PCB board, a frame disposed on the back of the PCB board, and an encapsulating adhesive covering the PCB board. The four edges of the frame have support portions facing the PCB board, which abut against the surface of the PCB board. An inner groove is formed along the axial direction of the support portion facing the PCB board. The bottom of the inner groove is arc-shaped. An elongated groove is formed on one side of the inner groove. One side of the elongated groove communicates with the inner groove, and the other side communicates with the outer wall of the support portion. The inner groove contains sealant. One side of the sealant passes through the elongated groove and protrudes from the frame to form a protrusion. The encapsulating adhesive is bonded to the protrusion.

2. The all-outdoor miniLED high-definition display screen according to claim 1, characterized in that: The PCB board has a number of LED beads arranged at intervals on the side away from the frame.

3. The all-outdoor miniLED high-definition display screen according to claim 2, characterized in that: The frame is mounted on the PCB board away from the side containing the LED by screws.

4. The all-outdoor miniLED high-definition display screen according to claim 1, characterized in that: The PCB board has potting compound applied to the locations of the components.

5. The all-outdoor miniLED high-definition display screen according to claim 2, characterized in that: The encapsulating adhesive is applied to the side of the PCB board containing the LED beads and covers the side wall of the frame in a surrounding manner.

6. The all-outdoor miniLED high-definition display screen according to claim 1, characterized in that: The encapsulating adhesive covers the middle of the frame sidewall and has a concave arc transition.

7. The all-outdoor miniLED high-definition display screen according to claim 1, characterized in that: The PCB board is made of insulating material and has a conductive copper foil pattern laid on its surface.

Images