COB packaged LED display screen

Abstract

The utility model belongs to the technical field of LED display screens, and particularly relates to a COB packaged LED display screen which comprises a face shell, a face cover is fixedly connected to the front side of the face shell, a circuit board is fixedly installed in the face cover, a plurality of air inlet holes are formed in the back face of the face shell, a plurality of air outlet holes are formed in the left end face and the right end face of the face shell, and the circuit board is fixedly installed in the face cover. A heat dissipation assembly is installed in the face shell, during heat dissipation, a motor is started, then air cooling is conducted, when the motor works, a driving swing mechanism drives a transmission plate to swing up and down in a reciprocating mode, and when the transmission plate swings, a shutter air plate swings up and down in a reciprocating mode under the cooperation of the driving swing mechanism; when the shutter wind plate swings up and down in a reciprocating mode, airflow generated by the fan blades can blow the circuit board up and down in a reciprocating mode, the trend of the airflow is continuously changed, heat can be prevented from being gathered at the local position of the LED display screen, and then the heat dissipation effect of the LED display screen can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to LED display screen technical field, concretely is a kind of COB encapsulated LED display screen. BACKGROUND

[0002] BOB encapsulated LED display screen is a kind of display screen using BOB encapsulation technology, it has higher integration and compact encapsulation structure, the existing BOB encapsulation technology is generally only used epoxy resin as encapsulation glue and is encapsulated, so it can appear the case that the thermal expansion coefficient of encapsulation glue and chip or substrate does not match, when temperature changes, when the expansion between encapsulation glue and chip / substrate produces difference, it can cause stress concentration, crack formation or failure, meanwhile, the hardness of epoxy resin after pouring is relatively large, it is difficult to open, when LED display screen fails, it is difficult to maintain.

[0003] Chinese patent (grant announcement number: CN 221125976 U, grant announcement date: 2024.06.11) proposes a new type of BOB encapsulated LED display screen, the patent effectively protects the lamp beads through the soft glue layer, the expansion coefficient of soft glue is good, can effectively protect the LED display screen, while the hardness of hard glue layer is high, and the insulation performance is good, and is used as the outer protection of LED display screen, when the LED display screen needs to be maintained on site, the external hard glue layer can be pried open, the internal soft glue layer is cleaned, and the LED display screen is maintained, after maintenance is completed, soft glue is injected between hard glue layer and LED display screen again encapsulation, can reduce the tediousness of LED display screen maintenance after encapsulation.

[0004] The above-mentioned patent is cooled through the corrugated heat sink and the heat dissipation port, and the single cooling effect leads to unsatisfactory cooling effect, which easily leads to rapid temperature rise in the box, affects the performance stability and service life of the components in the box, in order to improve the cooling intensity of COB encapsulated LED display screen, we propose a kind of COB encapsulated LED display screen. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a kind of COB encapsulated LED display screen, when cooling, motor is started, and then air cooling is carried out, when motor works, it will be driven to reciprocate up and down by driving swing mechanism and drive plate, when drive plate swings, it will make louvered wind board reciprocate up and down under the cooperation of driving swing mechanism, when louvered wind board reciprocate up and down, the airflow generated by fan blade can reciprocate up and down on circuit board, by constantly changing the direction of airflow, heat can be avoided to concentrate in the local part of LED display screen, and then the cooling effect of the present LED display screen can be improved, the background problem is solved.

[0006] To achieve the above purpose, the utility model is realized by the following technical scheme:

[0007] A COB packaged LED display screen, comprising a face shell, the front side of the face shell is fixedly connected with a face cover, the inside of the face cover is fixedly installed with a circuit board, the front side of the circuit board is installed with a plurality of LED lamp beads, the circuit board and the LED lamp beads are packaged with a packaging glue layer, the front side of the face cover is packaged with a glass protection layer, the back surface of the face shell is provided with a plurality of air inlet holes, the left and right end surfaces of the face shell are provided with a plurality of air outlet holes, and the inside of the face shell is installed with a heat dissipation assembly.

[0008] The heat dissipation assembly comprises a mounting frame, the mounting frame is fixedly connected with the inner wall of the face shell, the back surface of the mounting frame is provided with a motor, the output shaft of the motor is fixedly connected with a fan blade, and the output shaft end of the motor is rotatably installed with a mounting cover, a plurality of louvered wind plates are rotatably installed in the inside of the mounting frame through a rotating shaft, two groups of openings are formed in the back surface of the louvered wind plate, two groups of transmission bars are arranged on the back surface of the louvered wind plate, the transmission bar is rotatably connected with the inner wall of the opening on the louvered wind plate, the rotating shaft end of one group of louvered wind plates is fixedly connected with a transmission plate, and the transmission plate is connected with the motor through a driving swing mechanism.

[0009] Preferably, the driving swing mechanism comprises a transmission rod, the transmission rod is rotatably installed between the mounting cover and the mounting frame, one end of the transmission rod is fixedly connected with a driven bevel gear, the output shaft end of the motor is fixedly connected with a driving bevel gear, the driving bevel gear is meshed with the driven bevel gear, and the driving bevel gear and the driven bevel gear are arranged in the inside of the mounting cover; the mounting cover is fixedly connected with the inner wall of the mounting frame through a connecting frame; one end of the transmission rod, away from the mounting cover, is fixedly connected with a rotating disc; the rotating disc is rotatably connected with a connecting shaft at a position deviating from the center; a strip-shaped opening is formed in the transmission plate; and the connecting shaft is movably arranged in the strip-shaped opening.

[0010] Preferably, the back surface of the mounting frame is fixedly connected with a plurality of mounting supports, the back surface of the mounting frame is provided with an assembly frame, the assembly frame is fixedly connected with the mounting support through screws, and the motor is fixedly installed on the assembly frame.

[0011] Preferably, the back surface of the assembly frame is fixedly installed with a plurality of heat-conducting sheets, and the heat-conducting sheets are fixedly assembled with cooling pipes.

[0012] Preferably, the back surface of the circuit board is fixedly connected with a heat collecting plate through screws, and the back surface of the heat collecting plate is fixedly connected with a plurality of heat collecting fins.

[0013] Preferably, a plurality of heat dissipation notches are formed in the heat collecting fins.

[0014] The COB packaged LED display screen has the following beneficial effects compared with the prior art:

[0015] 1. The COB packaged LED display screen, when dissipating heat, starts the motor and then performs air cooling, in order to improve the heat dissipation intensity, the transmission plate is driven to reciprocate up and down by the driving swing mechanism when the motor is working, the louvered air baffle is driven to reciprocate up and down by the driving swing mechanism when the transmission plate swings, the airflow generated by the fan blades can reciprocate up and down on the circuit board when the louvered air baffle reciprocates up and down, the heat can be avoided to gather at the local part of the LED display screen by continuously changing the direction of the airflow, and the heat dissipation effect of the LED display screen can be improved.

[0016] 2. The COB packaged LED display screen, the heat generated by the circuit board can be collected by the heat conduction sheet, the air cooling effect can be improved, the contact area with the airflow can be improved by the heat collecting fin, and the air cooling effect is improved again. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic view of the front structure of the main body of the utility model;

[0018] Figure 2 It is a schematic view of the back structure of the main body of the utility model;

[0019] Figure 3 It is a schematic view of the split structure of the main body of the utility model;

[0020] Figure 4 It is another view of the split structure of the main body of the utility model;

[0021] Figure 5 It is a schematic view of the heat dissipation assembly structure of the utility model;

[0022] Figure 6 It is a schematic view of the split structure of the heat dissipation assembly of the utility model;

[0023] Figure 7 It is a schematic view of the split structure of the heat dissipation assembly of the utility model; Figure 5 It is an enlarged schematic view of structure A.

[0024] In the drawing: 1, face shell; 2, face cover; 3, circuit board; 4, LED lamp bead; 5, air inlet hole; 6, air outlet hole; 7, heat collecting plate; 8, packaging adhesive layer; 9, glass protection layer; 10, heat collecting fin; 11, mounting frame; 12, louvered air baffle; 13, transmission plate; 14, transmission rod; 15, transmission bar; 16, rotating disc; 17, mounting cover; 18, mounting bracket; 19, assembly frame; 20, cooling pipe; 21, heat conduction sheet; 22, motor; 23, fan blade; 24, connecting shaft. DETAILED DESCRIPTION

[0025] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0026] Please refer to Figures 1-7 The present application provides a technical scheme: a COB packaged LED display screen, comprising a face shell 1, the front side of the face shell 1 is fixedly connected with a face cover 2, the inside of the face cover 2 is fixedly installed with a circuit board 3, the front side of the circuit board 3 is installed with a plurality of LED lamp beads 4, the circuit board 3 and the LED lamp beads 4 are packaged with a packaging glue layer 8, the front side of the face cover 2 is packaged with a glass protective layer 9, the back surface of the face shell 1 is provided with a plurality of air inlet holes 5, the left and right end surfaces of the face shell 1 are both provided with a plurality of air outlet holes 6, and the inside of the face shell 1 is installed with a heat dissipation assembly;

[0027] The heat dissipation assembly comprises a mounting frame 11, the mounting frame 11 is fixedly connected with the inner wall of the face shell 1, the back surface of the mounting frame 11 is provided with a motor 22, the output shaft of the motor 22 is fixedly connected with a fan blade 23, the output shaft end of the motor 22 is rotatably installed with a mounting cover 17, a plurality of louvered wind plates 12 are rotatably installed in the inside of the mounting frame 11, two groups of openings are formed in the back surface of the louvered wind plates 12, two groups of transmission strips 15 are arranged on the back surface of the louvered wind plates 12, the transmission strips 15 are rotatably connected with the inner wall of the openings on the louvered wind plates 12, the end of the shaft of one group of louvered wind plates 12 is fixedly connected with a transmission plate 13, and the transmission plate 13 is connected with the motor 22 through a driving swing mechanism.

[0028] The LED lamp beads 4 are packaged to the circuit board 3 through the encapsulation adhesive layer 8, the LED lamp beads 4 on the circuit board 3 can be protected through the COB packaging, and the light color of the LED display screen can be improved through the COB packaging. The LED display screen can be protected from bumping through the face cover 2, the glass protection layer 9 and the face shell 1. When cooling, the motor 22 is started, the fan blades 23 are driven to rotate when the motor 22 is started, the external air enters the inside of the face shell 1 through the air inlet holes 5 when the fan blades 23 rotate, and the heat in the inside of the face shell 1 is discharged from the air outlet holes 6 after the heat is taken away. In order to improve the cooling intensity, the transmission plate 13 is driven to reciprocatingly swing up and down when the motor 22 works, the transmission plate 13 drives one group of louvered air baffle plates 12 to reciprocatingly swing up and down when the transmission plate 13 swings, the louvered air baffle plates 12 are driven to reciprocatingly swing up and down under the cooperation of the driving swing mechanism and the auxiliary swing of the transmission strips 15, and the airflow generated by the fan blades 17 can blow the circuit board 3 up and down when the louvered air baffle plates 12 reciprocatingly swing up and down. The airflow direction can be changed continuously, the heat can be prevented from gathering in the local part of the LED display screen, and the cooling effect of the LED display screen can be improved.

[0029] The driving swing mechanism comprises a transmission rod 14, the transmission rod 14 is rotatably installed between the mounting cover 17 and the mounting frame 11, one end of the transmission rod 14 is fixedly connected with a driven bevel gear, the output shaft end of the motor 22 is fixedly connected with a driving bevel gear, the driving bevel gear is engaged with the driven bevel gear, the driving bevel gear and the driven bevel gear are arranged in the inside of the mounting cover 17, the mounting cover 17 is fixedly connected with the inner wall of the mounting frame 11 through the connecting frame, one end of the transmission rod 14 away from the mounting cover 17 is fixedly connected with a rotating disc 16, the rotating disc 16 is rotatably connected with a connecting shaft 24 at the position deviated from the center of the rotating disc 16, and the transmission plate 13 is provided with a strip-shaped hole, and the connecting shaft 24 is movably arranged in the strip-shaped hole.

[0030] The motor 22 drives the driving bevel gear to rotate, the transmission rod 14 is driven to rotate due to the engagement between the driving bevel gear and the driven bevel gear, the rotating disc 16 is driven to rotate when the transmission rod 14 rotates, and the transmission plate 13 is driven to reciprocatingly swing up and down in cooperation with the connecting shaft 24 when the rotating disc 16 rotates.

[0031] The back of the mounting frame 11 is fixedly connected with a plurality of mounting supports 18, the back of the mounting frame 11 is provided with an assembly frame 19, the assembly frame 19 is fixedly connected with the mounting supports 18 through screws, and the motor 22 is fixedly installed on the assembly frame 19.

[0032] A plurality of heat-conducting sheets 21 are fixedly installed on the back of the assembly frame 19, and cooling pipes 20 are fixedly assembled on the heat-conducting sheets 21. The heat generated by the circuit board 3 can be collected through the heat-conducting sheets 21, and the air cooling effect can be improved.

[0033] The back of the circuit board 3 is fixedly connected with a heat collecting plate 7 through screws, and the back of the heat collecting plate 7 is fixedly connected with a plurality of heat collecting fins 10, so that the contact area with air flow is increased, and the air cooling effect is improved again.

[0034] A plurality of heat dissipation notches are formed in the heat collecting fins 10.

[0035] Working principle: the LED lamp beads 4 are packaged on the circuit board 3 through the packaging adhesive layer 8, the LED lamp beads 4 on the circuit board 3 are protected through COB packaging, and the light color of the LED display screen is improved through COB packaging. The LED display screen is protected from bumping through the packaging mask 2, the glass protection layer 9 and the face shell 1. When cooling, the motor 22 is started, and the motor 22 drives the fan blades 23 to rotate when it is started. When the fan blades 23 rotate, the external air enters the inside of the face shell 1 through the air inlet hole 5, and the heat inside the face shell 1 is taken away and discharged from a plurality of air outlet holes 6. In order to improve the heat dissipation intensity, the motor 22 drives the driving bevel gear to rotate when it works. Since the driving bevel gear is engaged with the driven bevel gear, the transmission rod 14 is driven to rotate. When the transmission rod 14 rotates, the rotating disc 16 is driven to rotate. When the rotating disc 16 rotates, the transmission plate 13 is driven to reciprocatingly swing up and down through the connecting shaft 24. When the transmission plate 13 swings, one group of louvered air baffle plates 12 are driven to reciprocatingly swing up and down. Since two groups of transmission bars 15 are rotatably installed between the louvered air baffle plates 12, the louvered air baffle plates 12 are driven to reciprocatingly swing up and down under the swing driving mechanism. When the louvered air baffle plates 12 reciprocatingly swing up and down, the air flow generated by the fan blades 17 blows the circuit board 3 reciprocatingly up and down. By continuously changing the direction of the air flow, the heat can be prevented from gathering in the local part of the LED display screen, and the heat dissipation effect of the LED display screen is improved.

[0036] The heat generated by the circuit board 3 is collected through the heat conduction sheet 21, the contact area with the air flow is increased through the heat collecting fins 10, and the air cooling effect is improved again.

[0037] It should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0038] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A COB packaged LED display screen comprising a face cover (1), characterized in that: The front side of the face shell (1) is fixedly connected with a mask (2), the inside of the mask (2) is fixedly installed with a circuit board (3), the front side of the circuit board (3) is installed with a plurality of LED lamp beads (4), the circuit board (3) and the LED lamp beads (4) are encapsulated with an encapsulation adhesive layer (8), the front side of the mask (2) is encapsulated with a glass protection layer (9), the back of the face shell (1) is provided with a plurality of air inlet holes (5), the left and right end faces of the face shell (1) are provided with a plurality of air outlet holes (6), and the inside of the face shell (1) is installed with a heat dissipation assembly. The heat dissipation assembly comprises a mounting frame (11), the mounting frame (11) is fixedly connected with the inner wall of the face shell (1), the back of the mounting frame (11) is provided with a motor (22), the output shaft of the motor (22) is fixedly connected with a fan blade (23), and the output shaft end of the motor (22) is rotatably installed with a mounting cover (17), the inside of the mounting frame (11) is rotatably installed with a plurality of louvered wind plates (12) through rotating shafts, the back of the louvered wind plate (12) is provided with two groups of openings, the back of the louvered wind plate (12) is provided with two groups of transmission strips (15), the transmission strips (15) are rotatably connected with the inner wall of the opening on the louvered wind plate (12), and the end of the rotating shaft of one group of louvered wind plates (12) is fixedly connected with a transmission plate (13). 2.The COB packaged LED display screen of claim 1, wherein: The driving swing mechanism comprises a transmission rod (14), the transmission rod (14) is rotatably installed between the mounting cover (17) and the mounting frame (11), one end of the transmission rod (14) is fixedly connected with a driven bevel gear, the output shaft end of the motor (22) is fixedly connected with a driving bevel gear, the driving bevel gear is engaged with the driven bevel gear, and the driving bevel gear and the driven bevel gear are arranged in the inside of the mounting cover (17). The mounting cover (17) is fixedly connected with the inner wall of the mounting frame (11) through a connecting frame, one end of the transmission rod (14) away from the mounting cover (17) is fixedly connected with a rotating disc (16), the rotating disc (16) is rotatably connected with a connecting shaft (24) away from the center, a strip-shaped opening is formed in the transmission plate (13), and the connecting shaft (24) is movably arranged in the strip-shaped opening.

3. The COB packaged LED display screen of claim 2, wherein: The back of the mounting frame (11) is fixedly connected with a plurality of mounting supports (18), the back of the mounting frame (11) is provided with an assembly frame (19), the assembly frame (19) is fixedly connected with the mounting supports (18) through screws, and the motor (22) is fixedly installed on the assembly frame (19).

4. The COB packaged LED display screen of claim 3, wherein: The back of the assembly frame (19) is fixedly installed with a plurality of heat-conducting sheets (21), and the heat-conducting sheets (21) are fixedly assembled with cooling pipes (20).

5. The COB packaged LED display screen according to claim 4, characterized in that: The back of the circuit board (3) is fixedly connected with a heat collecting plate (7) through screws, and the back of the heat collecting plate (7) is fixedly connected with a plurality of heat collecting fins (10).

6. The COB packaged LED display screen according to claim 5, characterized in that: A plurality of heat dissipation notches are formed in the heat collecting fins (10).

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