High-sealing-performance light-leakage-preventing Mini-LED backlight source

Abstract

The utility model discloses a Mini-LED backlight source with high sealing performance and light leakage prevention, and relates to the technical field of backlight sources. A power connection assembly is arranged at the bottom of the shell, an installation chamber is arranged in the shell, an insertion groove is formed in the top of the shell, a lamp panel is installed between the installation chamber and the insertion groove, a shading chamber is arranged at the top end of the insertion groove, sealing gaskets are arranged on the two sides of the bottom of the shading chamber, and a shading plate is arranged between the top ends of the two sealing gaskets. Bottom pressing holes are uniformly formed in the bottom surface of the main pressing block, springs are fixedly connected into the bottom pressing holes, the bottom ends of the springs abut against the top end of the shading plate, side pressing blocks are installed on the two sides of the top end of the shell, and rubber pressing rods are installed between the adjacent sides of the main pressing block and the side pressing blocks. According to the utility model, the shading chamber is arranged at the top end of the shell and is sealed, so that the integrated packaging and light leakage prevention functions of the backlight source are realized.

Description

Technical Field

[0001] This utility model belongs to the field of backlight technology, and specifically relates to a Mini-LED backlight with high sealing performance and light leakage prevention. Background Technology

[0002] Backlighting is a form of illumination commonly used in LCD displays. Since LCD displays do not emit light themselves, they require backlighting to assist their display. The common light-emitting component of backlighting is an LED light board. Among them, Mini LED is an LED light source with a crystal size between 50 and 200 μm. It has significant improvements over traditional LEDs in terms of brightness, contrast, color performance, and energy saving. When this LED light source is packaged into a backlight, it needs to be sealed to prevent light leakage.

[0003] The patent specification with publication number CN215642163U discloses an ultra-thin LED backlight, including L-rod one, L-rod two, a light guide plate and a PCB board. L-rod one and L-rod two are assembled to form a frame for mounting the light guide plate. A diffusion film is attached to the upper surface of the light guide plate and a reflective film is attached to the lower surface of the light guide plate. Mounting grooves for mounting the light guide plate are opened on the side walls of L-rod one and L-rod two.

[0004] This backlight source mounts the lamp panel between two L-shaped rods, with mounting grooves on the inner side of the L-shaped rods to seal the sides of the lamp panel. After the lamp panel is secured by clips covering all sides, clips are installed at the joints of the two L-shaped rods to fix the lamp panel. The shortcomings of this technical solution are twofold: First, the backlight source uses a two-end encapsulation method, meaning it has multiple encapsulation points, and is only fixed with screws. This simple encapsulation at multiple points results in insufficient overall sealing performance of the backlight source. Second, as a fully luminous LED panel, its edges are typically lined with LEDs. While this backlight source seals the sides of the lamp panel by setting mounting grooves on the inner side of the L-shaped rods, the outer edge of the mounting grooves lacks a light-shielding structure. This causes light to leak out along the mounting grooves after installation, resulting in light leakage.

[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0006] The purpose of this utility model is to provide a Mini-LED backlight with high sealing performance and light leakage prevention. The technical problem to be solved is as follows: Existing backlights have insufficient sealing performance and light leakage problems during use.

[0007] The objective of this utility model can be achieved through the following technical solutions:

[0008] A highly sealed, light-leakage-proof Mini-LED backlight includes a housing. A power connection assembly is located at the bottom of the housing, and an installation chamber is located inside. An insertion slot is located at the top of the housing. A lamp plate is installed between the installation chamber and the insertion slot. A light-shielding chamber is located at the top of the insertion slot. Sealing gaskets are placed on both sides of the bottom of the light-shielding chamber. A light-shielding plate is placed between the tops of the two sealing gaskets. A main pressure block is inserted into the top of the light-shielding plate. Bottom pressure holes are evenly distributed on the bottom surface of the main pressure block. A spring is fixedly connected inside each bottom pressure hole, and the bottom end of the spring abuts against the top of the light-shielding plate. Side pressure blocks are installed on both sides of the top of the housing. Adhesive pressure rods are installed between the main pressure block and the adjacent sides of the side pressure blocks.

[0009] As a further embodiment of this utility model: the power connection component includes a bottom connector disposed at the bottom of the installation chamber, and a power connection wire is disposed on one side of the bottom connector.

[0010] As a further aspect of this invention, the width of the light-shielding plate is smaller than the width of the light-shielding chamber.

[0011] As a further embodiment of this utility model: the top end of the main pressure block is flush with the top end of the side pressure block, the bottom end of the spring is lower than the bottom end of the main pressure block, and the top two sides of the main pressure block are provided with side grooves that are adapted to the shape of the rubber pressure rod.

[0012] As a further embodiment of this utility model: threaded holes are evenly provided on both sides of the top of the housing below the side pressure block, and a locking bolt is installed on the top of the side pressure block to fit the threaded holes. A side pressure groove is provided on the side of the side pressure block near the main pressure block, and the shape of the side pressure groove is adapted to the shape of the adhesive rod.

[0013] As a further embodiment of this utility model: a buffer cavity is provided between the side pressure block and the main pressure block.

[0014] The beneficial effects of this utility model are:

[0015] By setting an installation chamber inside the housing and setting an insertion groove at the top of the installation chamber, a main pressure block is inserted into the top of the insertion groove, and side pressure blocks are installed on both sides of the main pressure block at the top of the housing with locking bolts. A glue pressure rod for squeezing the main pressure block is installed between the side pressure blocks and the main pressure block, thereby completing the sealing of the backlight. Its technical advantage is that by encapsulating the lamp board in the installation chamber inside the housing with only a single outlet, the number of points to be sealed is reduced, and the sealing accuracy is higher because the side pressure blocks are limited by the locking positions of the locking bolts on both sides when sealing the main pressure block.

[0016] Furthermore, as the main pressure block moves downward to encapsulate, the spring fixedly connected at the bottom simultaneously presses the light-shielding plate placed at the bottom of the light-shielding chamber, thus shielding the side of the lamp panel at the encapsulation position. In other words, the backlight is shielded while being sealed. The light shielding and sealing are carried out simultaneously, forming an integrated solution for preventing light leakage and sealing. The process is further softened by the cushioning of the sealing gasket and the pressure rod, thereby improving the protection of the lamp panel. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

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

[0019] Figure 2 This is a half-sectional view of the present invention;

[0020] Figure 3 This is a utility model Figure 2 Enlarged detail view of point A in the middle;

[0021] Figure 4 This is a utility model Figure 2 A magnified view of the details at point B in the middle.

[0022] In the diagram: 1. Housing; 2. Power connection assembly; 3. Mounting chamber; 4. Insertion slot; 5. Lamp panel; 6. Light shielding chamber; 7. Sealing gasket; 8. Light shielding plate; 9. Main pressure block; 10. Bottom pressure hole; 11. Spring; 12. Side pressure block; 13. Adhesive pressure rod; 14. Bottom connector; 15. Power connection wire; 16. Side recess; 17. Locking bolt; 18. Side pressure groove; 19. Buffer chamber; 20. Heat dissipation hole assembly. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0024] like Figures 1 to 4As shown, a Mini-LED backlight with high sealing performance and light leakage prevention includes a housing 1. A power connection component 2 is provided at the bottom of the housing 1, and an installation chamber 3 is provided inside. An insertion slot 4 is provided at the top of the housing 1. A lamp plate 5 is installed between the installation chamber 3 and the insertion slot 4. A light shielding chamber 6 is provided at the top of the insertion slot 4. Sealing gaskets 7 are placed on both sides of the insertion slot 4 at the bottom of the light shielding chamber 6. A light shielding plate 8 is placed between the tops of the two sealing gaskets 7. A main pressure block 9 is inserted into the top of the light shielding plate 8. Bottom pressure holes 10 are evenly provided on the bottom surface of the main pressure block 9. A spring 11 is fixedly connected in each bottom pressure hole 10. The bottom end of the spring 11 abuts against the top of the light shielding plate 8. Side pressure blocks 12 are installed on both sides of the top of the housing 1. Adhesive pressure rods 13 are installed between the sides of the main pressure block 9 and the adjacent sides of the side pressure blocks 12.

[0025] It should be noted that the housing 1 includes, but is not limited to, straight, curved, and ring-shaped shapes. Since Mini LEDs are produced using substrate growth technology, when the substrate is made of flexible material, the LED light board produced by growth is a flexible light board compared to the conventional light board made by mechanically arranging LED beads. That is, Mini LED chips can be made into backlights for curved scene displays and straight scene displays according to the application scenario. When the housing 1 is ring-shaped, the shapes of the various structures installed on its top are adapted to be ring-shaped, but the basic structure of the single-sided packaging of the backlight is not changed.

[0026] The power connection assembly 2 includes a bottom connector 14 located at the bottom of the mounting chamber 3. A power connection wire 15 is provided on one side of the bottom connector 14. The power connection assembly 2 is used to supply power to the lamp board 5 installed between the bottom connector 14 and the insertion slot 4 to realize the display function of the backlight.

[0027] The width of the light shield 8 is smaller than the width of the light shielding chamber 6, which makes it easier for it to be placed into the light shielding chamber 6. The light shield 8 is used to shield the sealed position at the top of the backlight to prevent light leakage at the seal.

[0028] The top of the main pressure block 9 is flush with the top of the side pressure blocks 12 on both sides, and the bottom of the spring 11 is lower than the bottom of the main pressure block 9. The top of the main pressure block 9 is provided with side grooves 16 that are compatible with the glue pressure bar 13.

[0029] The top of the main pressure block 9 is flush with the side pressure blocks 12 on both sides to improve the aesthetics of the top sealing area. When the natural length of the spring 11 fixedly connected in the bottom pressure hole 10 is greater than the depth of the bottom pressure hole 10, when the main pressure block 9 presses down on the light shield 8, it can ensure that the spring 11 exerts a gradual elastic pressure on the light shield 8. Together with the sealing gasket 7 placed at the bottom of the light shield 8, it can ensure that the light shield 8 effectively blocks light while avoiding damage to the lamp plate 5 caused by the rigid pressing of the main pressure block 9, thus improving the protection of the lamp plate 5 during sealing.

[0030] Threaded holes are evenly arranged on both sides of the top of the housing 1 below the side pressure block 12. Locking bolts 17 are installed on the top of the side pressure block 12 to fit the threaded holes. A side pressure groove 18 is provided on the side of the side pressure block 12 near the main pressure block 9. The shape of the side pressure groove 18 is adapted to the shape of the glue pressure rod 13. When the locking bolts 17 lock the main pressure block 9 and the side pressure block 12, the side pressure groove 18 at the bottom of the side pressure block 12 presses against the glue pressure rod 13, thereby realizing the downward installation of the main pressure block 9. After locking, the downward stroke distance of the main pressure block 9 is guaranteed, realizing the positioning and sealing function.

[0031] The pressure rod 13 is preferably made of rubber. A buffer cavity 19 is provided between the side pressure block 12 and the main pressure block 9. This provides space for the deformation of the pressure rod 13 during locking, avoiding the generation of extrusion stress during the sealing process. Since the sealing process of the main pressure block 9 and the light-shielding process of the light shield 8 are both accompanied by a flexible extrusion process, and the extrusion stroke is limited by the connection position of the main pressure block 9 and the side pressure block 12, the backlight is accurately sealed and the protection of the installed lamp plate 5 is maintained.

[0032] Specifically, firstly, the lamp plate 5 is inserted into the bottom bracket 14 inside the mounting chamber 3 through the insertion slot 4. Then, the lamp plate 5 is successfully installed by connecting the power cord 15. Next, sealing and light-shielding treatment is performed. The sealing gasket 7 and the light-shielding plate 8 are placed from the top of the light-shielding chamber 6 to the bottom of the light-shielding chamber 6. The side pressure blocks 12 are placed on the top of the housing 1 on both sides of the main pressure block 9 and locked with locking bolts 17. During the locking process, the side pressure blocks 12 installed on both sides move down and squeeze the rubber pressure rod 13 installed between the side pressure blocks 12 and the main pressure block 9, causing the clamped main pressure block 9 to move down. During the downward movement of the main pressure block 9, the light-shielding plate 8 is fixed, completing the sealing and light-shielding treatment of the backlight device. In addition, a heat dissipation hole group 20 is provided on the back of the lamp plate 5 at the bottom of the housing 1 to dissipate the heat generated by the lamp plate 5 in the backlight during use.

[0033] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A highly sealed, light-leakage-proof Mini-LED backlight, comprising a housing (1), characterized in that, The bottom of the housing (1) is provided with a power connection component (2) and an installation chamber (3) is provided inside. The top of the housing (1) is provided with an insertion slot (4). A lamp plate (5) is installed between the installation chamber (3) and the insertion slot (4). A light-shielding chamber (6) is provided at the top of the insertion slot (4). Sealing gaskets (7) are placed on both sides of the bottom of the light-shielding chamber (6). A light-shielding plate (8) is placed between the tops of the two sealing gaskets (7). A main pressure block (9) is inserted into the top of the light-shielding plate (8). Bottom pressure holes (10) are evenly provided on the bottom surface of the main pressure block (9). A spring (11) is fixedly connected inside the bottom pressure hole (10). The bottom end of the spring (11) abuts against the top of the light-shielding plate (8). Side pressure blocks (12) are installed on both sides of the top of the housing (1). A glue rod (13) is installed between the adjacent sides of the main pressure block (9) and the side pressure block (12).

2. The Mini-LED backlight with high sealing performance and light leakage prevention according to claim 1, characterized in that, The power connection assembly (2) includes a bottom connector (14) disposed at the bottom of the installation chamber (3), and a power connection wire (15) is disposed on one side of the bottom connector (14).

3. A Mini-LED backlight with high sealing performance and preventing light leakage according to claim 1, characterized in that, The width of the light-shielding plate (8) is smaller than the width of the light-shielding chamber (6).

4. A Mini-LED backlight with high sealing and light leakage prevention according to claim 1, characterized in that, The top of the main pressure block (9) is flush with the top of the side pressure block (12), the bottom of the spring (11) is lower than the bottom of the main pressure block (9), and the top sides of the main pressure block (9) are provided with side grooves (16) that are adapted to the shape of the adhesive rod (13).

5. A Mini-LED backlight with high sealing performance and preventing light leakage according to claim 1, characterized in that, The top of the housing (1) is provided with threaded holes on both sides below the side pressure block (12). The top of the side pressure block (12) is fitted with locking bolts (17) that are adapted to the threaded holes. The side pressure block (12) is provided with a side pressure groove (18) on the side near the main pressure block (9). The shape of the side pressure groove (18) is adapted to the shape of the adhesive rod (13).

6. A Mini-LED backlight with high sealing performance and preventing light leakage according to claim 1, characterized in that, A buffer cavity (19) is provided between the side pressure block (12) and the main pressure block (9).

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