A dustproof and sealed backlight with a light guide plate

Abstract

This utility model relates to the field of electro-optics technology, and in particular to a dustproof and sealed backlight with a light guide plate. It includes a mounting shell, a reflector plate mounted on the innermost side of the inner wall of the mounting shell, a light guide plate in front of the reflector plate, a ring of LED strips between the reflector plate and the light guide plate, a diffuser plate in front of the light guide plate, and a prism plate in front of the diffuser plate. It also includes a sealing strip, a mounting frame, a connecting frame, and a connecting rod. A sealing strip is provided between the light guide plate and the diffuser plate, and the sealing strip adheres to the edges of the light guide plate and the diffuser plate. The mounting frame is mated to the front of the mounting shell. This utility model, through the sealing strip between the light guide plate and the diffuser plate, and the action of a spring, presses the mounting frame towards the mounting shell, ensuring that the sealing strip can tightly adhere to the edges of each layer of optical materials, thereby effectively improving the sealing performance of the light guide plate and reducing the risk of dust ingress.

Description

Technical Field

[0001] This utility model relates to the field of electronic optics technology, and in particular to a backlight source with a dustproof and sealed light guide plate. Background Technology

[0002] With the development of display technology, the requirements for display devices are becoming increasingly stringent, especially for displays used outdoors, in industrial environments, or in any dusty place. Traditional display backlight designs may not be able to effectively prevent external dust from entering the display module. Over time, dust can easily enter the backlight structure. As a key component of the backlight, dust accumulation on the surface of the light guide plate can lead to uneven screen brightness and dark spots. This not only affects display quality but may also shorten the lifespan of the device.

[0003] Traditional backlight designs have large gaps in the frame, which makes it easy for dust to enter and deposit on the dots of the light guide plate, affecting optical performance. On the other hand, although a fully sealed structure can effectively prevent dust from entering, this design hinders the effective dissipation of internal heat, causing the backlight temperature to rise during operation, which may affect electronics. In view of the above-mentioned defects, we propose a backlight with a dustproof and sealed light guide plate to improve the defects of the existing technology. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a backlight with a dustproof and sealed light guide plate.

[0005] The technical implementation scheme of this utility model is as follows: A dustproof and sealed backlight with a light guide plate includes a mounting shell, a reflector, a light strip, a light guide plate, a diffuser plate, and a prism plate. The mounting shell is the assembly backplate frame of this backlight. A reflector is installed on the innermost side of the inner wall of the mounting shell. The front side of the reflector is the light guide plate. A ring of light strip is installed between the reflector and the light guide plate. The front side of the light guide plate is the diffuser plate, and the front side of the diffuser plate is the prism plate. It also includes a sealing strip, a mounting frame, a connecting frame, and a connecting rod. A sealing strip is provided between the light guide plate and the diffuser plate. The sealing strip is attached to the edge of the light guide plate and the diffuser plate. The front side of the mounting shell is mated with the mounting frame. The mounting shell and the mounting frame constitute the main frame of this backlight. The prism plate is fixedly built into the inside of the mounting frame. The four corners of the mounting frame near the mounting shell are fixedly connected with connecting rods. The mounting frame is slidably connected to a connecting frame through the connecting rods. The connecting frame is located between the mounting frame and the mounting shell. The connecting frame and the mounting shell are fixedly snapped together. A spring is provided at the connecting rod between the mounting frame and the connecting frame. The spring is in a stretched state.

[0006] More preferably, the connecting frame has symmetrically fixedly connected card plates on both sides of its frame edge, and the card plates have card slots inside. The mounting shell has locking fasteners on both sides of its shell edge that can securely fasten the mounting frame and the connecting frame to the mounting shell.

[0007] More preferably, the locking component includes a guide rod, a wedge block, and a second spring. The guide rod is fixedly connected to both sides of the back shell of the mounting housing away from each layer of optical plates. A wedge block is slidably mounted on the guide rod, with the inclined surface of the wedge block facing the mounting frame. A second spring is provided on the guide rod between the wedge block and the mounting housing. The mounting frame is slidably engaged with the wedge block on the mounting housing by a locking plate on the connecting frame.

[0008] More preferably, an electric push rod is fixedly installed on the back shell of the mounting shell, and a contact block is fixedly connected to the piston rod of the electric push rod. The contact block and the corresponding wedge block on the same side are in contact with each other. By extending and retracting the piston rod of the electric push rod, the contact block presses or releases the wedge block, so that the wedge block can automatically unlock or lock the card plate.

[0009] More preferably, the mounting shell has ventilation openings at both the top and bottom, and a magnetic base is fixedly connected to the ventilation opening. The magnetic base has an opening adapted to the ventilation opening, and a magnetic frame is magnetically attached to the magnetic base. The magnetic frame has an opening on which a dustproof filter is installed, and anti-slip textures are fixed on both sides of the frame.

[0010] More preferably, the mating surface of the magnetic base has a ring of insertion holes around its circumference, and the mating surface of the magnetic frame is circumferentially fixed with a protruding rod that fits the insertion hole. The protruding rod of the magnetic frame can be inserted into the insertion hole of the magnetic base, thereby improving the stability of the magnetic base magnetically engaging with the magnetic frame.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] 1. This utility model uses a sealing strip between the light guide plate and the diffuser plate, combined with the action of a spring, to press the mounting frame toward the mounting shell side, ensuring that the sealing strip can fit tightly against the edges of each layer of optical material, thereby effectively improving the sealing performance of the light guide plate and reducing the risk of dust entering.

[0013] 2. This utility model, through the design of the locking component, combined with the electric push rod automatic unlocking or locking mechanism, allows the overall frame plate of the mounting frame and connecting frame to be securely snapped onto the mounting shell, while also facilitating quick disassembly, maintenance, and cleaning.

[0014] 3. This utility model is equipped with a ventilation opening and a magnetic frame with a dust filter, which not only helps with heat dissipation but also effectively prevents dust from entering. In addition, the protruding rod and the socket design further enhance the stability of the connection. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is an exploded view of the internal structure of the backlight of this utility model.

[0017] Figure 3 This is a schematic diagram of the connecting frame, connecting rod, spring, and locking plate of this utility model.

[0018] Figure 4 This is a schematic diagram of the magnetic base and magnetic frame after separation.

[0019] Figure 5 This is a schematic diagram showing the mating relationship between the mounting shell, wedge block, electric push rod, and contact block of this utility model.

[0020] The components in the attached diagram are labeled as follows: 1. Mounting housing, 2. Reflector, 3. Lamp strip, 4. Light guide plate, 5. Sealing strip, 6. Diffuser plate, 7. Prism plate, 8. Mounting frame, 9. Connecting frame, 10. Connecting rod, 11. Spring 1, 12. Clamping plate, 13. Guide rod, 14. Wedge block, 15. Spring 2, 16. Electric push rod, 161. Contact block, 17. Magnetic base, 171. Insertion hole, 18. Magnetic frame, 19. Filter screen, 191. Protruding rod, 20. Anti-slip texture. Detailed Implementation

[0021] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] A backlight with a dustproof and sealed light guide plate, such as Figures 1-5As shown, the backlight includes a mounting shell 1, a reflector 2, a light strip 3, a light guide plate 4, a diffuser plate 6, and a prism plate 7. The mounting shell 1 is the assembly backplate frame of this backlight. The reflector 2 is installed on the innermost side of the inner wall of the mounting shell 1. The light guide plate 4 is located in front of the reflector 2. A light strip 3 is installed between the reflector 2 and the light guide plate 4. The diffuser plate 6 is located in front of the light guide plate 4, and the prism plate 7 is located in front of the diffuser plate 6. The backlight also includes a sealing strip 5, a mounting frame 8, a connecting frame 9, and a connecting rod 10. A sealing strip 5 is provided between the light guide plate 4 and the diffuser plate 6. The sealing strip 5 is attached to the edge of the light guide plate 4 and the diffuser plate 6. The mounting frame 8 is mated to the front of the mounting shell 1. The mounting shell 1 and the mounting frame 8 constitute the main body of this backlight. The frame and prism plate 7 are fixedly built into the mounting frame 8. The four corners of the mounting frame 8 near the mounting shell 1 are fixedly connected to the connecting rods 10. The mounting frame 8 is slidably connected to the connecting frame 9 through the connecting rods 10. The connecting frame 9 is located between the mounting frame 8 and the mounting shell 1. The connecting frame 9 and the mounting shell 1 are fixedly snapped together. The connecting rods 10 between the mounting frame 8 and the connecting frame 9 are provided with springs 11. The springs 11 are in a stretched state. The springs act on the mounting frame 8, so that the mounting frame 8 presses the optical plates inside the backlight towards the mounting shell 1, so that the sealing strip 5 can be tightly attached to the edge of the light guide plate 4 and the prism plate 7, improving the sealing performance of the light guide plate 4 and reducing the risk of dust entering the light guide plate 4.

[0023] like Figure 3 and Figure 5 As shown, the frame of the connecting frame 9 is symmetrically fixedly connected to the two sides of the frame edge with a card plate 12. The card plate 12 has a card slot inside. The mounting shell 1 has locking fasteners for the locking card plate 12 on both sides of the shell edge. The locking fasteners can securely attach the mounting frame 8 and the connecting frame 9 to the mounting shell 1, and at the same time facilitate the removal of the mounting frame 8 from the mounting shell 1.

[0024] like Figure 5 As shown, the locking mechanism includes a guide rod 13, a wedge block 14, and a second spring 15. The guide rod 13 is fixedly connected to both sides of the back shell of the mounting shell 1, which is away from the back shell of each layer of optical plates. The wedge block 14 is slidably installed on the guide rod 13, with the inclined surface of the wedge block 14 facing the mounting frame 8. A second spring 15 is provided on the guide rod 13 between the wedge block 14 and the mounting shell 1. The mounting frame 8 is slidably engaged with the wedge block 14 on the mounting shell 1 via the locking plate 12 on the connecting frame 9, so that the mounting shell 1, the mounting frame 8, and the connecting frame 9 can be stably spliced ​​together to form the overall frame of the backlight.

[0025] like Figure 5As shown, an electric push rod 16 is fixedly installed on the back shell of the mounting shell 1. A contact block 161 is fixedly connected to the piston rod of the electric push rod 16. The contact block 161 and the corresponding wedge block 14 on the same side are in contact with each other. The contact block 161 presses or releases the wedge block 14 by extending and retracting the piston rod of the electric push rod 16, so that the wedge block 14 can automatically unlock or lock the card plate 12.

[0026] like Figure 2 and Figure 4 As shown, ventilation openings are provided at the top and bottom of the mounting shell 1. A magnetic base 17 is fixed to the ventilation opening of the mounting shell 1. The magnetic base 17 has an opening adapted to the ventilation opening. A magnetic frame 18 is magnetically attached to the magnetic base 17. A dustproof filter 19 is installed on the opening of the magnetic frame 18. Anti-slip textures 20 are fixed on both sides of the frame of the magnetic frame 18. The anti-slip textures 20 make it easy for the user to hold the magnetic frame 18 and remove it from the magnetic base 17.

[0027] like Figure 4 As shown, a ring of insertion holes 171 is formed around the mating surface of the magnetic base 17, and a protrusion 191 that fits the insertion hole 171 is fixedly connected to the mating surface of the magnetic frame 18. The protrusion 191 of the magnetic frame 18 can be inserted into the insertion hole 171 of the magnetic base 17, thereby improving the stability of the magnetic base 17 magnetically engaging the magnetic frame 18.

[0028] During assembly, optical components such as reflector 2, light guide plate 4, sealing strip 5, and diffuser 6 are first stacked and installed in the mounting housing 1. By pressing the mounting frame 8, the mounting frame 8 drives the connecting frame 9 to move towards the mounting housing 1. At this time, the spring 11 on the connecting rod 10 is stretched, and the spring 11 generates a reverse rebound force on the mounting frame 8. When the mounting frame 8 and the mounting housing 1 are close together, the retaining plates 12 on both sides of the connecting frame 9 will slide along the inclined surface of the wedge block 14, compressing the second spring 15 and causing the wedge block 14 to temporarily move backward. After the retaining plate 12 is fully embedded in the slot, the second spring 15 pushes the wedge block 14 to reset, locking the retaining plate 12 and achieving a stable connection between the mounting frame 8 and the mounting housing 1. During this process, the spring 11 continues to move. The tension causes the mounting frame 8 to exert a uniform pressure on the internal optical plate, forcing the sealing strip 5 to fit tightly against the edge of the light guide plate 4, forming a ring-shaped sealing barrier that effectively prevents dust from entering. When maintenance is required, the contact block 161 is pushed by the electric push rod 16 to press the wedge block 14 backward, releasing the lock on the card plate 12. The rebound force of the spring 11 automatically pops the mounting frame 8 away from the mounting shell 1, achieving tool-free quick disassembly. In terms of ventilation and heat dissipation, the magnetic frame 18 is magnetically fixed after precise alignment with the insertion hole 171 of the magnetic base 17 via the protrusion rod 191. The filter 19 covers the ventilation opening to achieve dust prevention and ventilation. Users can directly remove the magnetic frame 18 to clean or replace the filter 19 through the anti-slip texture 20, ensuring heat dissipation efficiency while maintaining dust prevention performance.

[0029] Although this disclosure has been shown and described with reference to specific exemplary embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made to this disclosure without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents. Therefore, the scope of this disclosure should not be limited to the above embodiments, but should be defined not only by the appended claims, but also by their equivalents.

Claims

1. A dustproof and sealed backlight with a light guide plate, comprising a mounting shell (1), a reflector (2), a light strip (3), a light guide plate (4), a diffuser plate (6), and a prism plate (7), wherein the reflector (2) is installed on the innermost side of the inner wall of the mounting shell (1), the light guide plate (4) is located in front of the reflector (2), a light strip (3) is installed between the reflector (2) and the light guide plate (4), the diffuser plate (6) is located in front of the light guide plate (4), and the prism plate (7) is located in front of the diffuser plate (6); Its characteristics are, It also includes a sealing strip (5), a mounting frame (8), a connecting frame (9), and a connecting rod (10). A sealing strip (5) is provided between the light guide plate (4) and the diffuser plate (6). The sealing strip (5) is attached to the edge of the light guide plate (4) and the diffuser plate (6). The mounting frame (8) is mated to the front side of the mounting shell (1). The mounting shell (1) and the mounting frame (8) constitute the main frame of this backlight. The prism plate (7) is fixedly built into the inside of the mounting frame (8). The mounting frame (8) is fixedly connected to the four corners of the frame near the mounting shell (1). The mounting frame (8) is slidably connected to the connecting frame (9) through the connecting frame (10). The connecting frame (9) is located between the mounting frame (8) and the mounting shell (1). The connecting frame (9) and the mounting shell (1) are fixedly snapped together. A spring (11) is provided at the connecting frame (10) between the mounting frame (8) and the connecting frame (9). The spring (11) is in a stretched state.

2. A backlight source with a dustproof and sealed light guide plate according to claim 1, characterized in that, The connecting frame (9) has a card plate (12) symmetrically fixedly connected to both sides of the frame edge. The card plate (12) has a card slot inside. The mounting shell (1) has a locking buckle for the card plate (12) on both sides of the shell edge.

3. A backlight source with a dustproof and sealed light guide plate according to claim 2, characterized in that, The locking mechanism includes a guide rod (13), a wedge block (14), and a second spring (15). The guide rod (13) is fixedly connected to both sides of the back shell of the mounting shell (1) away from each layer of optical plates. The wedge block (14) is slidably mounted on the guide rod (13). The inclined surface of the wedge block (14) faces the mounting frame (8). The second spring (15) is provided on the guide rod (13) between the wedge block (14) and the mounting shell (1).

4. A backlight source with a dustproof and sealed light guide plate according to claim 3, characterized in that, An electric push rod (16) is fixedly installed on the back shell of the mounting shell (1). A contact block (161) is fixedly connected to the piston rod of the electric push rod (16). The contact block (161) and the corresponding wedge block (14) on the same side are in contact with each other.

5. A backlight source with a dustproof and sealed light guide plate according to claim 4, characterized in that, Ventilation openings are provided at the top and bottom of the mounting shell (1). A magnetic base (17) is fixedly connected to the ventilation opening of the mounting shell (1). The magnetic base (17) is provided with an opening adapted to the ventilation opening. A magnetic frame (18) is magnetically attached to the magnetic base (17). A dustproof filter (19) is installed on the opening of the magnetic frame (18). Anti-slip textures (20) are fixed on both sides of the frame of the magnetic frame (18).

6. A backlight source with a dustproof and sealed light guide plate according to claim 5, characterized in that, The magnetic base (17) has a ring of insertion holes (171) circumferentially formed on its mating surface, and the magnetic frame (18) has a protrusion (191) that is adapted to the insertion holes (171) circumferentially fixed to its mating surface.

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