Backlight module of display control panel

Abstract

The invention relates to a display control panel backlight module, and relates to the technical field of control panels, the display control panel backlight module comprises a front shell, a rear shell is arranged on the lower side of the front shell, a placement groove is formed in the middle of the front shell, a diffusion plate is arranged on the inner wall of the placement groove, and a circuit board is arranged on the lower side of the diffusion plate; backlight lamp panels are arranged on the four sides of the upper end of the circuit board, and a back plate is arranged at the lower end of the circuit board. Inserting blocks are fixed to the two sides of the front shell correspondingly, clamping grooves are formed in the middles of the two inserting blocks correspondingly, and penetrating grooves are formed in the two sides of the rear shell correspondingly. Power is supplied to the backlight lamp panel through circuit conduction of the circuit board, the effect of sufficient irradiation is achieved, the effect of improving the using effect of the backlight module is achieved, the sliding disc is manually pressed to move upwards, the effect of convenient mounting or dismounting is achieved, the effect of improving the using convenience of the backlight module is achieved, and the service life of the backlight module is prolonged. And the effect of flexible adsorption separation is achieved, and the effect of improving the use protection performance of the backlight module is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of control panel, in particular to a display control panel back light module. BACKGROUND

[0002] Back light is a form of illumination, often used in LCD display. Back light is illuminated from the side or the back, in order to display the content more clearly. In industrial applications, display control panel needs to operate in dark light conditions. In order to enable the staff to accurately identify the various operating information on the display control panel in dark light conditions, the panel needs to have certain back light performance. There are various buttons, switches on the industrial display control panel, which leads to the traditional back and side illumination of the back light mode cannot display the operating information of the panel uniformly and completely in dark light, which affects the work efficiency of the operator.

[0003] In order to solve this problem, more and more display control panels use light diffusion technology, which expands the illumination range of the back light source through the light diffusion performance of the diffusion plate to illuminate the area blocked by the buttons and switches. Thus the operating information on the display control panel is displayed more uniformly and clearly. When there are too many buttons, switches and other components installed on the display control panel, that is, there are more operating information to be displayed, and the blocked area also increases. This leads to the back light panel of the display control panel module needs more light sources, which in turn leads to increased energy consumption, and thus the use effect of the back light module is not good enough.

[0004] Therefore, it is necessary to invent a display control panel back light module to solve the above problems. SUMMARY

[0005] The present application aims to provide a display control panel back light module to solve the problems raised in the background.

[0006] To solve the above technical problems, the present application provides the following technical scheme: a display control panel back light module, comprising a front shell, a rear shell is arranged on the lower side of the front shell, a placing groove is arranged in the middle of the front shell, a diffusion plate is arranged on the inner wall of the placing groove, a circuit board is arranged on the lower side of the diffusion plate, a back light panel is arranged on the upper end of the four sides of the circuit board, and a back plate is arranged on the lower end of the circuit board. The front shell is fixed with plug blocks on both sides, the middle part of the two plug blocks is provided with a clamping groove, the two sides of the rear shell are provided with a through groove, the middle part of the rear shell is provided with a sliding groove, the lower end of the sliding groove is provided with a through groove, the two sides of the sliding groove are provided with a receiving groove, the upper end of the two receiving grooves is provided with a recess, the inner wall of the sliding groove is provided with a connecting structure, and the connecting structure is provided with two clamping blocks.

[0007] Preferably, the connecting structure comprises a sliding disc, the upper side of the sliding disc is fixed with a spring, the two sides of the sliding disc are fixed with fixed blocks, the distal ends of the two fixed blocks are rotatably connected with connecting frames, and the distal ends of the two connecting frames are rotatably connected with clamping blocks.

[0008] Preferably, the outer surface of the sliding disc is slidably connected to the inner wall of the sliding groove, the transverse section of the sliding disc is circular, the upper end of the spring is fixed to the inner wall of the upper end of the sliding groove, and the lower end of the spring is fixed to the upper end of the sliding disc.

[0009] Preferably, the two fixed blocks are fixed to the two sides of the sliding disc, the distal ends of the two fixed blocks are rotatably connected to the proximal ends of the two connecting frames, the distal ends of the two connecting frames are rotatably connected to the distal ends of the two clamping blocks, the outer surfaces of the two clamping blocks are slidably connected to the inner walls of the two receiving grooves, and the distal sides of the two receiving grooves are in communication with the proximal sides of the two through grooves.

[0010] Preferably, the upper ends of the two plug blocks are fixed to the two sides of the front shell, the outer surfaces of the two plug blocks are in contact with the inner walls of the two through grooves, the two through grooves penetrate the two sides of the rear shell, the outer surfaces of the two clamping blocks are in contact with the inner walls of the two clamping grooves, and the upper surface of the rear shell is in contact with the lower surface of the back plate.

[0011] Preferably, the diffusion plate comprises a light-transmitting plate made of optical-grade polymethyl methacrylate, a diffusion film is attached to the upper surface of the light-transmitting plate, a light-transmitting film is attached to the upper surface of the diffusion film, a reflecting film is attached to the lower surface of the light-transmitting plate, and a plurality of diffusion points are arranged uniformly in the middle part of the light-transmitting plate.

[0012] Preferably, the outer surface of the diffusion plate is in contact with the inner wall of the placing groove, the four backlight panels are electrically connected with the circuit board, the four backlight panels are arranged in the middle part of the four sides of the diffusion plate, the outer surfaces of the four backlight panels are in contact with the inner wall of the placing groove, and the outer surfaces of the circuit board and the back plate are in contact with the inner wall of the placing groove.

[0013] Preferably, two said clamping blocks are fixed with driving blocks on their adjacent sides, two said driving blocks are fixed with connecting rods on their adjacent ends, two said connecting rods are slidably connected with driving rods on their outer surfaces, two said driving rods are provided with inclined grooves in their middle parts, two said driving rods are fixed with sliding blocks on their upper ends, and the inner walls of two said grooves are fixed with suction cups.

[0014] Preferably, two said driving blocks are fixed on the opposite sides of two said clamping blocks, two said driving blocks are fixed on the ends of two said connecting rods, two said connecting rods are slidably connected with two said inclined grooves, two said driving blocks are symmetrically arranged, and the vertical sections of two said driving blocks are L-shaped.

[0015] Preferably, two said inclined grooves are symmetrically arranged in the middle parts of two said driving rods, two said driving rods are fixed with two said sliding blocks on their lower sides, two said sliding blocks are slidably connected with two said grooves, two said suction cups are fixed in the middle parts of two said grooves, the inner walls of two said suction cups are in contact with the lower surface of the back plate, and the upper sides of two said suction cups are in gap cooperation with the inner walls of two said grooves.

[0016] Compared with the prior art, the present application has the following advantages: (1) The circuit of the circuit board is used to supply power to the backlight plate, so that the diffusion plate, the circuit board, the backlight plate, the back plate, the light-transmitting plate, the diffusion film, the light-transmitting film, the reflecting film, and the diffusion points cooperate with each other to achieve the effect of full irradiation, effectively improve the backlight uniformity of the panel, solve the problem of blurred information display and uneven backlight on the light-transmitting film caused by the shielding of buttons, switches, and the like, and thus improve the use effect of the backlight module; (2) The sliding disc is moved upward by manual pressing, so that the sliding groove, the through groove, the storage groove, the sliding disc, the spring, the fixed block, the connecting frame, the clamping block, the plug-in block, the clamping groove, and the through slot cooperate with each other to achieve the effect of convenient installation or disassembly, effectively reduce the operation steps of the workers, reduce the labor intensity, provide convenience for the assembly of the backlight module, and thus improve the use convenience of the backlight module; (3) The recess, the driving block, the connecting rod, the driving rod, the inclined groove, the sliding block, and the suction cup cooperate with each other to achieve the effect of flexible adsorption and separation, which not only separates the backlight module shell from the core components, but also effectively protects the core components, and thus improves the use protection of the backlight module. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the overall structural diagram of the present application; Figure 2 It is the front shell cross-sectional view of the present application; Figure 3A schematic view of the diffusion plate structure of the present application; Figure 4 A schematic view of the light transmission plate structure of the present application; Figure 5 A sectional view of the rear shell of the present application; Figure 6 A schematic view of the rear shell of the present application Figure 5 A magnified view of the structure of A part of the present application; Figure 7 A sectional view of the partial structure of the present application; Figure 8 A schematic view of the partial structure of the present application Figure 7 A magnified view of the structure of B part of the present application; Figure 9 A schematic view of the partial structure of the present application; Figure 10 A sectional view of the driving rod of the present application.

[0018] In the figure: 1, front shell; 2, rear shell; 3, placing groove; 4, diffusion plate; 5, circuit board; 6, back light plate; 7, back plate; 8, light transmission plate; 9, diffusion film; 10, light transmission film; 11, reflecting film; 12, diffusion point; 13, sliding groove; 14, through groove; 15, receiving groove; 16, recess; 17, sliding disc; 18, spring; 19, fixed block; 20, connecting frame; 21, clamping block; 22, plug-in block; 23, clamping groove; 24, through groove; 25, driving block; 26, connecting rod; 27, driving rod; 28, inclined groove; 29, sliding block; 30, suction disc. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0020] Embodiment one The present embodiment provides a display control panel back light module; Please refer to Figures 1-10As shown, including the front shell 1, the lower side of the front shell 1 is provided with the rear shell 2, the middle part of the front shell 1 is provided with the placing groove 3, the inner wall of the placing groove 3 is provided with the diffusion plate 4, the lower side of the diffusion plate 4 is provided with the circuit board 5, the upper end of the circuit board 5 is provided with the backlight lamp plate 6, the lower end of the circuit board 5 is provided with the back plate 7, the diffusion plate 4 includes the light transmission plate 8 made of optical grade polymethyl methacrylate, the upper surface of the light transmission plate 8 is provided with the diffusion film 9, the upper surface of the diffusion film 9 is provided with the light transmission film 10, the lower surface of the light transmission plate 8 is provided with the reflection film 11, the middle part of the light transmission plate 8 is provided with a plurality of evenly arranged diffusion points 12, the outer surface of the diffusion plate 4 is in contact with the inner wall of the placing groove 3, the four backlight lamp plates 6 are electrically connected with the circuit board 5, the four backlight lamp plates 6 are arranged in the middle part of the four sides of the diffusion plate 4, the outer surface of the four backlight lamp plates 6 is in contact with the inner wall of the placing groove 3, the outer surface of the circuit board 5 and the back plate 7 is in contact with the inner wall of the placing groove 3, the diffusion plate 4, the circuit board 5, the backlight lamp plate 6 and the back plate 7 are connected into a whole through screws, when the backlight lamp plate 6 is lighted, the light emitted from the four sides of the diffusion plate 4 enters the light transmission plate 8, the light transmission plate 8 adopts a material with extremely strong light transmission rate to conduct the light inside, at the same time, the circular diffusion points 12 evenly arranged on the surface of the light transmission plate 8 scatter the light, so that the light changes the propagation direction and is evenly distributed, then the light is projected to the diffusion film 9 adhered to the upper surface of the light transmission plate 8, the diffusion film 9 further diffuses the light to make the light more uniform and soft, then the light reaches the light transmission film 10 adhered to the upper surface of the diffusion film 9, the light transmission film 10 diffuses the light to the surface of the diffusion plate 4, so as to realize the backlight illumination of the display control panel. In this process, the light downward propagated by the light transmission plate 8 is reflected back to the inside of the light transmission plate 8 by the reflection film 11 adhered to the lower surface of the light transmission plate 8, so that the light can be used again, the light energy utilization rate is improved, so as to effectively increase the panel backlight uniformity, solve the problem that the information display on the light transmission film 10 is not clear and the backlight is not uniform due to the shielding of buttons, switches and the like.

[0021] The specific implementation process is as follows: the circuit of the circuit board 5 is conducted to supply power for the backlight lamp plate 6, then the backlight lamp plate 6 is lighted, the light emitted from the backlight lamp plate 6 irradiates the four side edges of the diffusion plate 4. The light enters from the four sides of the diffusion plate 4, the light transmission plate 8 in the diffusion plate 4 conducts the light, and the light is uniformly and clearly projected to the diffusion film 9 through the plurality of light diffusion points 12 arranged on the upper surface of the light transmission plate 8. Then, the light transmission film 10 adhered to the upper surface of the diffusion film 9 further diffuses the light to the surface of the diffusion plate 4. In this process, the light downward propagated by the light transmission plate 8 is reflected back to the inside of the light transmission plate 8 by the reflection film 11 adhered to the lower surface of the light transmission plate 8, so as to realize the effect of full irradiation, effectively improve the panel backlight uniformity, solve the problem that the information display on the light transmission film 10 is blurred and the backlight is not uniform due to the shielding of buttons, switches and the like, and then achieve the effect of improving the use effect of the backlight module.

[0022] Example two In the assembly process of the backlight module, the shell is usually fastened and installed by screws. However, during the installation and disassembly, the workers need to twist a plurality of screws, which undoubtedly increases the complexity of the work and brings many inconveniences to the actual use. In order to better serve the assembly work of the workers, a quick-release shell needs to be designed to provide practical convenience for the assembly work of the backlight module.

[0023] Please refer to Figures 1-10 As shown in the figure, the convenient installation or disassembly function is added on the basis of the first embodiment; Please refer to Figures 1-10 As shown in the figure, the front shell 1 is fixed with the plug-in block 22 on both sides, the middle part of the two plug-in blocks 22 is provided with the clamping groove 23, the two sides of the rear shell 2 are provided with the through groove 24, the middle part of the rear shell 2 is provided with the sliding groove 13, the lower end of the sliding groove 13 is provided with the through groove 14, the two sides of the sliding groove 13 are provided with the storage groove 15, the upper end of the two storage grooves 15 is provided with the recess 16, the inner wall of the sliding groove 13 is provided with the connecting structure, the connecting structure includes the sliding disc 17, the upper side of the sliding disc 17 is fixed with the spring 18, the two sides of the sliding disc 17 are fixed with the fixed block 19, the far end of the two fixed blocks 19 is rotatably connected with the connecting frame 20, and the far end of the two connecting frames 20 is rotatably connected with the clamping block 21.

[0024] Please refer to Figures 1-10 As shown in the figure, the outer surface of the sliding disc 17 is slidably connected to the inner wall of the sliding groove 13, the sliding disc 17 is circular in transverse section, the upper end of the spring 18 is fixed to the inner wall of the sliding groove 13, the lower end of the spring 18 is fixed to the upper end of the sliding disc 17, the two sides of the sliding disc 17 are fixed with the two fixed blocks 19, the far end of the two fixed blocks 19 is rotatably connected to the near end of the two connecting frames 20, the far end of the two connecting frames 20 is rotatably connected to the far end of the two clamping blocks 21, the outer surface of the two clamping blocks 21 is slidably connected to the inner wall of the two storage grooves 15, the far side of the two storage grooves 15 is in communication with the near side of the two through grooves 24, the upper end of the two plug-in blocks 22 is fixed to the two sides of the front shell 1, the outer surface of the two plug-in blocks 22 is in contact with the inner wall of the two through grooves 24, the two through grooves 24 pass through the two sides of the rear shell 2, the outer surface of the two clamping blocks 21 is in contact with the inner wall of the two clamping grooves 23, and the upper surface of the rear shell 2 is in contact with the lower surface of the back plate 7.

[0025] The specific implementation process is as follows: the sliding disc 17 is moved upward by pressing it manually, and the spring 18 fixed at the upper end is compressed, so that a compression space is obtained. At the same time, the fixed block 19 fixed on both sides of the sliding disc 17 is moved upward. The fixed block 19 moves upward and drives the clamping block 21 connected to the connecting frame 20 to move away from each other, and the two clamping blocks 21 move close to each other under the limiting action of the inner wall of the receiving groove 15. When the two clamping blocks 21 are completely inserted into the receiving groove 15, the two through grooves 24 are no longer blocked, and at this time, the two insertion blocks 22 fixed on both sides of the front shell body 1 are inserted into the through grooves 24; Then, the compressed spring 18 releases the elastic potential energy and drives the sliding disc 17 to move downward. The sliding disc 17 drives the two clamping blocks 21 to move away from each other through the fixed block 19 and the connecting frame 20 connected thereto. After the clamping blocks 21 slide out of the receiving groove 15, they are inserted into the clamping groove 23 in the middle of the insertion block 22 inserted into the through groove 24, thereby connecting the front shell body 1 and the rear shell body 2; When disassembly is required, the clamping blocks 21 can be pulled out of the clamping groove 23 by pressing the sliding disc 17. The entire process does not require screwing, and the simple operation of "pressing-inserting-releasing" achieves convenient installation or disassembly, effectively reduces the operation steps of the workers, reduces the labor intensity, provides convenience for the assembly of the backlight module, and further improves the convenience of the backlight module.

[0026] Example three During the long-term use of the backlight module, the core part is tightly attached to the inner wall of the shell body due to the tight connection of the shell body. When the shell body is separated, the back plate 7 of the core part is often adhered to the shell body, which causes the workers to have to press the diffusion plate 4 to disassemble. However, the diffusion plate 4 is fragile, and the pressing operation is easy to damage it. In order to solve this problem, a flexible adsorption disassembly structure needs to be designed to separate the core part from the shell body while providing effective protection.

[0027] Please refer to Figures 1-10 The flexible adsorption separation function is added on the basis of example two; Please refer to Figures 1-10As shown, two adjacent sides of the two clamping blocks 21 are fixed with driving blocks 25, the two driving blocks 25 are fixed with connecting rods 26 at the proximal ends, the outer surfaces of the two connecting rods 26 are slidingly connected with driving rods 27, the middle portions of the two driving rods 27 are provided with inclined grooves 28, the upper ends of the two driving rods 27 are fixed with sliding blocks 29, the middle portions of the inner walls of the grooves 16 are fixed with suction cups 30, the distal ends of the two driving blocks 25 are fixed on the distal sides of the two clamping blocks 21, the proximal ends of the two driving blocks 25 are fixed on the two ends of the two connecting rods 26, the outer surfaces of the two connecting rods 26 are slidingly connected with the inner walls of the two inclined grooves 28, the two driving blocks 25 are symmetrically arranged, the vertical cross sections of the two driving blocks 25 are L-shaped, the two inclined grooves 28 are symmetrically arranged in the middle portions of the two driving rods 27, the upper ends of the two driving rods 27 are fixed on the middle portions of the lower sides of the two sliding blocks 29, the outer surfaces of the two sliding blocks 29 are slidingly connected with the inner walls of the two grooves 16, the lower ends of the two suction cups 30 are fixed on the middle portions of the two grooves 16, the inner walls of the two suction cups 30 are in contact with the lower surface of the back plate 7, the upper sides of the two suction cups 30 are in gap cooperation with the inner walls of the two grooves 16, the connecting rods 26 drive the driving rods 27 to move in cooperation with the inclined grooves 28, mainly based on the inclined surface transmission and lever principle, when the two connecting rods 26 approach each other, the end portions will slide along the inclined grooves 28 symmetrically arranged in the middle portions of the driving rods 27, the inclined grooves 28 are at an inclined angle, the inclined structure forms an inclined surface, and the end portions of the connecting rods 26 can be regarded as sliding blocks moving on the inclined surface, from the perspective of mechanics, when the connecting rods 26 are forced to approach in the horizontal direction, the horizontal component force will be converted into a vertical component force by the inclined angle of the inclined grooves 28 in the process of sliding along the inclined grooves 28, the vertical component force acts on the driving rods 27, so as to drive the driving rods 27 to overcome the gravity and other possible resistances and move downward in the vertical direction; in this process, the driving rods 27 can be approximately regarded as a lever, taking the connection point between the driving rod 27 and other components as the fulcrum, the vertical component force exerted by the connecting rod 26 when sliding in the inclined groove 28 is the power, and the gravity of the driving rod 27 and the friction with the surrounding components are the resistance, when the power is greater than the resistance, the driving rod 27 will rotate downward around the fulcrum, that is, the downward movement is realized, and the sliding blocks 29 are fixed on the upper ends of the driving rods 27, as the driving rods 27 move downward, the sliding blocks 29 also move downward synchronously under the limiting of the inner walls of the grooves 16, thereby triggering a series of actions such as the adsorption of the subsequent suction cups 30.

[0028] The specific implementation process is as follows: the sliding disc 17 is pressed by manpower to move upward, so that the fixed blocks 19 fixed on both sides of the sliding disc 17 are simultaneously lifted. The two connecting frames 20 rotatably connected at the distal ends of the fixed blocks 19 are driven to approach each other along the limiting direction of the receiving groove 15 under the driving of the fixed blocks 19. The clamping blocks 21 drive the driving blocks 25 fixed on the adjacent sides to approach synchronously, thereby causing the connecting rods 26 fixed at the proximal ends of the driving blocks 25 to approach each other. When the two connecting rods 26 are close, the oblique grooves 28 symmetrically opened in the middle of the driving rods 27 cooperate with each other to promote the downward movement of the two driving rods 27. The sliding blocks 29 fixed on the upper ends of the driving rods 27 are limited by the inner wall of the groove 16 and move downward synchronously with the driving rods 27. Since the suction cups 30 are closely attached to the back of the back plate 7 during installation, the downward movement of the sliding blocks 29 causes the formation of negative pressure in the area where the suction cups 30 are attached to the back plate 7, so that the suction cups 30 are firmly adsorbed on the back of the back plate 7; When the front shell 1 and the rear shell 2 are pressed to separate, the suction cups 30 continuously pull the back plate 7, so that the diffusion plate 4, the circuit board 5, the back light plate 6 and the back plate 7 connected by the screws are smoothly taken out from the placing groove 3 of the front shell 1 while the shells are separated, realizing the effect of flexible adsorption and separation. The separation of the back light module shell and the core components is realized, and the core components are effectively protected, thereby improving the protective effect of the back light module.

[0029] Although the embodiments of the present application have been shown and described, it is understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A display control panel back light module, comprising a front shell (1), characterized in that: The front shell (1) is provided with a rear shell (2) on the lower side, a placing groove (3) is formed in the middle of the front shell (1), a diffusion plate (4) is arranged on the inner wall of the placing groove (3), a circuit board (5) is arranged on the lower side of the diffusion plate (4), a backlight plate (6) is arranged on the upper end of the four sides of the circuit board (5), and a back plate (7) is arranged on the lower end of the circuit board (5). The front shell (1) is provided with a rear shell (2) on the lower side, a placing groove (3) is formed in the middle of the front shell (1), a diffusion plate (4) is arranged on the inner wall of the placing groove (3), a circuit board (5) is arranged on the lower side of the diffusion plate (4), a backlight plate (6) is arranged on the upper end of the four sides of the circuit board (5), and a back plate (7) is arranged on the lower end of the circuit board (5).

2. The display control panel back light module according to claim 1, characterized in that: The connecting structure comprises a sliding disc (17), a spring (18) is fixed on the upper side of the sliding disc (17), and a fixed block (19) is fixed on the two sides of the sliding disc (17). The two fixed blocks (19) are rotatably connected with a connecting frame (20) at the distal ends thereof, and the connecting frame (20) is rotatably connected with a clamping block (21) at the distal end thereof.

3. The display control panel back light module according to claim 2, characterized in that: The outer surface of the sliding disc (17) is slidably connected to the inner wall of the sliding groove (13), the sliding disc (17) is circular in transverse section, the upper end of the spring (18) is fixed to the inner wall of the upper end of the sliding groove (13), and the lower end of the spring (18) is fixed to the upper end of the sliding disc (17).

4. The display control panel back light module according to claim 2, characterized in that: The two fixed blocks (19) are fixed to the two sides of the sliding disc (17) at the proximal ends thereof, the two fixed blocks (19) are rotatably connected to the two connecting frames (20) at the distal ends thereof, the two connecting frames (20) are rotatably connected to the two clamping blocks (21) at the distal ends thereof, the outer surfaces of the two clamping blocks (21) are slidably connected to the inner walls of the two receiving grooves (15), and the distal sides of the two receiving grooves (15) are in communication with the proximal sides of the two through grooves (24).

5. The display control panel back light module according to claim 2, characterized in that: The two fixed blocks (19) are fixed to the two sides of the sliding disc (17) at the proximal ends thereof, the two fixed blocks (19) are rotatably connected to the two connecting frames (20) at the distal ends thereof, the two connecting frames (20) are rotatably connected to the two clamping blocks (21) at the distal ends thereof, the outer surfaces of the two clamping blocks (21) are slidably connected to the inner walls of the two receiving grooves (15), and the distal sides of the two receiving grooves (15) are in communication with the proximal sides of the two through grooves (24). The two fixed blocks (19) are fixed to the two sides of the sliding disc (17) at the proximal ends thereof, the two fixed blocks (19) are rotatably connected to the two connecting frames (20) at the distal ends thereof, the two connecting frames (20) are rotatably connected to the two clamping blocks (21) at the distal ends thereof, the outer surfaces of the two clamping blocks (21) are slidably connected to the inner walls of the two receiving grooves (15), and the distal sides of the two receiving grooves (15) are in communication with the proximal sides of the two through grooves (24).

6. The display control panel back light module according to claim 1, characterized in that: The diffusion plate (4) comprises a light-transmitting plate (8) made of optical-grade polymethyl methacrylate, a diffusion film (9) is attached to the upper surface of the light-transmitting plate (8), a light-transmitting film (10) is attached to the upper surface of the diffusion film (9), a reflective film (11) is attached to the lower surface of the light-transmitting plate (8), and a plurality of diffusion dots (12) are arranged uniformly in the middle of the light-transmitting plate (8).

7. The display control panel back light module according to claim 1, characterized in that: The outer surface of the diffusion plate (4) is in contact with the inner wall of the placing groove (3), the four backlight lamp plates (6) are electrically connected with the circuit board (5), the four backlight lamp plates (6) are arranged in the middle of the four sides of the diffusion plate (4), the outer surfaces of the four backlight lamp plates (6) are in contact with the inner wall of the placing groove (3), the outer surfaces of the circuit board (5) and the back plate (7) are in contact with the inner wall of the placing groove (3), and the diffusion plate (4), the circuit board (5), the backlight lamp plate (6) and the back plate (7) are connected into an integral whole by screws.

8. The display control panel back light module according to claim 1, characterized in that: Two driving blocks (25) are fixed on the sides close to the two clamping blocks (21), two connecting rods (26) are fixed on the ends close to the two driving blocks (25), two driving rods (27) are slidably connected to the outer surfaces of the two connecting rods (26), two inclined grooves (28) are formed in the middle portions of the two driving rods (27), two sliding blocks (29) are fixed to the upper ends of the two driving rods (27), and the inner walls of the two grooves (16) are fixed with two suction cups (30).

9. The display control panel back light module according to claim 8, characterized in that: The two driving blocks (25) are fixed on the sides away from the two clamping blocks (21), the two driving blocks (25) are fixed on the ends close to the two connecting rods (26), the outer surfaces of the two connecting rods (26) are slidably connected to the inner walls of the two inclined grooves (28), the two driving blocks (25) are symmetrically arranged, and the vertical sections of the two driving blocks (25) are L-shaped.

10. The display control panel back light module according to claim 8, characterized in that: The two inclined grooves (28) are symmetrically formed in the middle portions of the two driving rods (27), the upper ends of the two driving rods (27) are fixed to the middle portions of the lower sides of the two sliding blocks (29), the outer surfaces of the two sliding blocks (29) are slidably connected to the inner walls of the two grooves (16), the lower ends of the two suction cups (30) are fixed to the middle portions of the two grooves (16), the inner walls of the two suction cups (30) are in contact with the lower surface of the back plate (7), and the upper sides of the two suction cups (30) are in gap cooperation with the inner walls of the two grooves (16).

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