Light leakage prevention backlight source module

Abstract

The utility model discloses a light leakage prevention backlight source module which comprises a bottom plate and a frame, a light emitting assembly is installed on the inner side of the frame, the light emitting assembly comprises a circuit board and an LED lamp, a light leakage prevention assembly is installed on the inner side of the frame and comprises a light guide plate and a reflective mirror, an air inlet assembly is installed on one side of the frame, and an air outlet assembly is installed on the other side of the frame. According to the light leakage prevention backlight source module, the periphery of the LED lamp and the periphery of the frame can be sealed through the reflective mirror, light leakage is avoided, meanwhile, light is reflected to the light guide plate, the light transmission rate is increased, the light leakage prevention effect is good, and the light leakage prevention backlight source module is suitable for being used for a large-scale production line. The brightness consistency of the backlight source is guaranteed through the reflective mirror and the light guide plate, the illumination efficiency is further improved, the illumination area can be adjusted according to the illumination range, the adaptability of the backlight source is improved, and the backlight source is suitable for illumination of advertising boards, product display and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of backlight module equipment, in particular to a light leakage-proof backlight module. Background Art

[0002] Backlight sources are commonly used surface lighting equipment that can improve high-quality lighting for billboards, product displays, etc. The utility model patent with patent application number CN202121393220.7 discloses a light leakage-proof backlight source, with light baffles added at both ends and anti-scattering plates added in front of the lamp beads. Light is not easy to leak out, light pollution is not easy to cause, the light output is more uniform, and the visual and use effects are better, effectively meeting the use requirements. According to the technical solution disclosed by it, when the existing backlight source module is in use, on the one hand, when the optical fiber is irradiated on the light guide plate, part of the light will be reflected onto the circuit board, base and other mechanisms, causing the light to be absorbed by the above-mentioned mechanisms, thereby reducing the light transmission rate, which is not conducive to improving the brightness of the backlight source. On the other hand, during operation, the lighting range cannot be adjusted as needed, thereby reducing the adaptability of the equipment.

[0003] Therefore, how to design a light leakage-proof backlight module has become a problem we need to solve at present. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a light leakage-proof backlight module to solve the problems raised in the above-mentioned background technology. The present invention has a reasonable design and is relatively convenient to use, and is suitable for lighting of billboards, product displays, etc.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-light leakage backlight source module, comprising a bottom plate and a frame, a light-emitting component is installed on the inner side of the frame, the light-emitting component includes a circuit board and an LED lamp, an anti-light leakage component is installed on the inner side of the frame, the anti-light leakage component includes a light guide plate and a reflector, an air intake component is installed on one side of the frame, the air intake component includes an inlet and a filter, a heat dissipation component is installed on the other side of the frame, the heat dissipation component includes an outlet and a fan, a partition component is installed on the inner side of the light guide plate, the partition component includes a bayonet and a guide plate, a movable component is installed on the guide plate, and the movable component includes an iron plate and an electromagnet.

[0006] Furthermore, the frame is welded to the top of the four sides of the base plate, the circuit board is installed on the top of the base plate by bolts, and the LED lamp is welded to the top of the circuit board.

[0007] Furthermore, the reflector is welded to the inner side of the frame, the four sides of the light guide plate are bonded to the inner wall of the top of the reflector, and the top of the LED lamp passes through the reflector and extends to the top of the reflector.

[0008] Furthermore, the inlet and the outlet are respectively provided on two sides of the frame, the filter is welded to the inner wall of the inlet, and the fan is installed on the inner side of the outlet by bolts.

[0009] Furthermore, the bayonet is opened on the inner side of the light guide plate, the top of the guide plate is clamped on the inner side of the bayonet, and the bottom of the guide plate passes through the reflector and extends to the bottom of the reflector.

[0010] Furthermore, the iron plate is welded to the bottom of the guide plate, the electromagnet is installed on the inner side of the circuit board through bolts, and the electromagnet is connected to the iron plate through a spring.

[0011] Furthermore, the circuit board is provided with through openings, the through openings are located on both sides of the electromagnet, the bottom of the circuit board is bonded to the baffle, and the bottom of the baffle is bonded to the top of the bottom plate.

[0012] Furthermore, the baffle is located on one side of the through opening, and both sides of the guide plate are coated with reflective film.

[0013] Beneficial effects: 1. When the anti-light leakage backlight module is in use, the circuit board is used to power the LED lamp. Light is emitted from the top of the LED lamp, which shines on the light guide plate and transmits outward through the light guide plate. A part of the light reflected by the light guide plate shines on the reflector, which is then reflected by the reflector onto the light guide plate, and then transmits outward through the light guide plate again. The reflector is used to seal the LED lamp and the frame around to avoid light leakage, and at the same time, the light is reflected onto the light guide plate to increase the light transmission rate, thereby increasing the lighting brightness of the backlight source.

[0014] 2. When the light leakage prevention backlight module is working, the fan generates suction on the inner side of the frame, and the air enters the top of the bottom plate through the inlet after being filtered by the filter, and then flows out through the outlet after cooling the circuit board and LED lamp, so as to ensure the working safety of the circuit board and LED lamp. When only the lighting range needs to be adjusted, the LED lamp in a certain area is turned on, and the adjacent electromagnet is turned off. The spring pushes the iron plate upward, and the guide plate is inserted into the inner side of the bayonet, and the light generated by the LED lamp is reflected into the lighting area with the help of the reflective film on the guide plate. When the whole area is illuminated, the LED lamp and electromagnet used are turned on, and the electromagnet attracts the iron block downward through magnetic force, and the guide plate moves to be level with the top of the reflector. The reflection of the reflector and the light guiding work of the light guide plate are used to ensure the consistency of the brightness of the backlight source, thereby improving the lighting efficiency. The illumination area can be adjusted according to the lighting range, and the adaptability of the backlight source is improved.

[0015] 3. The anti-light leakage backlight module is reasonably designed, efficient and convenient to use, and is suitable for lighting of billboards, product displays, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a light leakage-proof backlight source module of the utility model;

[0017] Figure 2 This is a cross-sectional view of a light leakage-proof backlight source module of the utility model;

[0018] Figure 3 This is a cross-sectional view of a guide plate of a light leakage-proof backlight source module of the utility model;

[0019] In the figure: 1. bottom plate; 2. frame; 3. circuit board; 4. LED lamp; 5. light guide plate; 6. reflector; 7. inlet; 8. filter; 9. outlet; 10. fan; 11. bayonet; 12. guide plate; 13. iron plate; 14. electromagnet; 15. spring; 16. opening; 17. baffle. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figures 1 to 3The utility model provides a technical solution: an anti-light leakage backlight source module, comprising a bottom plate 1 and a frame 2, a light-emitting component is installed on the inner side of the frame 2, the light-emitting component comprises a circuit board 3 and an LED lamp 4, an anti-light leakage component is installed on the inner side of the frame 2, the anti-light leakage component comprises a light guide plate 5 and a reflector 6, an air intake component is installed on one side of the frame 2, the air intake component comprises an inlet 7 and a filter 8, a heat dissipation component is installed on the other side of the frame 2, the heat dissipation component comprises an outlet 9 and a fan 10, a partition component is installed on the inner side of the light guide plate 5, the partition component comprises a bayonet 11 and a guide plate 12, a movable component is installed on the guide plate 12, the movable component comprises an iron plate 13 and an electromagnet 14, the frame 2 is welded to the top of the four sides of the bottom plate 1, and the circuit board 3 is screwed in place by screws. The bolt is installed on the top of the base plate 1, the LED lamp 4 is welded on the top of the circuit board 3, the reflector 6 is welded on the inner side of the frame 2, the four sides of the light guide plate 5 are bonded to the inner wall of the top of the reflector 6, the top of the LED lamp 4 passes through the reflector 6 and extends to the top of the reflector 6. When in use, the LED lamp 4 is powered by the circuit board 3, and the top of the LED lamp 4 emits light, which is irradiated onto the light guide plate 5 and transmitted outwardly through the light guide plate 5. A part of the light reflected by the light guide plate 5 is irradiated onto the reflector 6, and then reflected by the reflector 6 onto the light guide plate 5, and then transmitted outwardly through the light guide plate 5 again. The reflector 6 is used to seal the four sides of the LED lamp 4 and the frame 2 to avoid light leakage, and at the same time, the light is reflected onto the light guide plate 5 to increase the light transmission rate, thereby increasing the lighting brightness of the backlight source.

[0022] In this embodiment, the inlet 7 and the outlet 9 are respectively provided on both sides of the frame 2, the filter 8 is welded on the inner wall of the inlet 7, the fan 10 is installed on the inner side of the outlet 9 by bolts, the bayonet 11 is provided on the inner side of the light guide plate 5, the top of the guide plate 12 is clamped on the inner side of the bayonet 11, the bottom of the guide plate 12 passes through the reflector 6 and extends to the bottom of the reflector 6, the iron plate 13 is welded to the bottom of the guide plate 12, the electromagnet 14 is installed on the inner side of the circuit board 3 by bolts, the electromagnet 14 is connected to the iron plate 13 by a spring 15, a through opening 16 is provided on the circuit board 3, the through opening 16 is located on both sides of the electromagnet 14, the bottom of the circuit board 3 is bonded to the baffle 17, the bottom of the baffle 17 is bonded to the top of the bottom plate 1, the baffle 17 is located on one side of the through opening 16, both sides of the guide plate 12 are coated with reflective film, and when working, the fan 10 generates a reflective film on the inner side of the frame 2 Suction, the air is filtered by the filter 8 and enters the top of the bottom plate 1 through the inlet 7, and then flows out through the outlet 9 after cooling the circuit board 3 and the LED lamp 4, ensuring the working safety of the circuit board 3 and the LED lamp 4. When only the lighting range needs to be adjusted, the LED lamp 4 in a certain area is turned on, and the adjacent electromagnet 14 is turned off. The spring 15 pushes the iron plate 13 upward, and the guide plate 12 is inserted into the inner side of the bayonet 11, and the light generated by the LED lamp 4 is reflected into the lighting area with the help of the reflective film on the guide plate 12. When the entire area is illuminated, the used LED lamp 4 and electromagnet 14 are turned on, and the electromagnet 14 attracts the iron block 13 downward through magnetic force, and the guide plate 12 moves to be level with the top of the reflector 6. The reflection of the reflector 6 and the light guiding work of the light guide plate 5 are used to ensure the consistency of the brightness of the backlight source, thereby improving the lighting efficiency, and the illumination area can be adjusted according to the lighting range to improve the adaptability of the backlight source.

[0023] The anti-light leakage backlight source module provides power to all electrical devices through an external power supply. When in use, the circuit board 3 supplies power to the LED lamp 4. The top of the LED lamp 4 emits light, which shines on the light guide plate 5 and is transmitted outward through the light guide plate 5. A part of the light reflected by the light guide plate 5 shines on the reflector 6, which is then reflected by the reflector 6 to the light guide plate 5, and then is transmitted outward again through the light guide plate 5. The LED lamp 4 and the frame 2 are sealed around the reflector 6 to avoid light leakage. At the same time, the light is reflected on the light guide plate 5 to increase the light transmission rate, thereby increasing the lighting brightness of the backlight source. When working, the fan 10 generates suction on the inner side of the frame 2, and the air enters the top of the bottom plate 1 through the inlet 7 after being filtered by the filter 8, and then the circuit board 3 and the LED lamp 4 are filtered. After cooling, it flows out through the outlet 9 to ensure the working safety of the circuit board 3 and the LED lamp 4. When only the lighting range needs to be adjusted, the LED lamp 4 in a certain area is turned on, and the adjacent electromagnet 14 is turned off. The spring 15 pushes the iron plate 13 upward, and the guide plate 12 is inserted into the inner side of the bayonet 11. With the help of the reflective film on the guide plate 12, the light generated by the LED lamp 4 is reflected into the lighting area. When the entire area is illuminated, the LED lamp 4 and the electromagnet 14 used are turned on. The electromagnet 14 attracts the iron block 13 downward through magnetic force, and the guide plate 12 moves to be level with the top of the reflector 6. The reflection of the reflector 6 and the light guiding of the light guide plate 5 are used to ensure the consistency of the brightness of the backlight source, thereby improving the lighting efficiency. The illumination area can be adjusted according to the lighting range to improve the adaptability of the backlight source.

[0024] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A light leakage prevention backlight module, comprising a bottom plate (1) and a frame (2), wherein a light emitting component is installed on the inner side of the frame (2), and the light emitting component comprises a circuit board (3) and an LED lamp (4), characterized in that: A light leakage prevention component is installed on the inner side of the frame (2), and the light leakage prevention component includes a light guide plate (5) and a reflector (6); an air intake component is installed on one side of the frame (2), and the air intake component includes an inlet (7) and a filter (8); a heat dissipation component is installed on the other side of the frame (2), and the heat dissipation component includes an outlet (9) and a fan (10); a partition component is installed on the inner side of the light guide plate (5), and the partition component includes a bayonet (11) and a guide plate (12); a movable component is installed on the guide plate (12), and the movable component includes an iron plate (13) and an electromagnet (14).

2. The light leakage prevention backlight module according to claim 1, characterized in that: The frame (2) is welded to the top of the four sides of the base plate (1), the circuit board (3) is installed on the top of the base plate (1) by means of bolts, and the LED lamp (4) is welded to the top of the circuit board (3).

3. The light leakage-proof backlight module according to claim 2, characterized in that: The reflector (6) is welded to the inner side of the frame (2), the four sides of the light guide plate (5) are bonded to the inner wall of the top of the reflector (6), and the top of the LED lamp (4) passes through the reflector (6) and extends to the top of the reflector (6).

4. The light leakage-proof backlight module according to claim 3, characterized in that: The inlet (7) and the outlet (9) are respectively provided on both sides of the frame (2); the filter (8) is welded to the inner wall of the inlet (7); and the fan (10) is installed on the inner side of the outlet (9) by means of bolts.

5. The light leakage prevention backlight module according to claim 1, characterized in that: The bayonet (11) is opened on the inner side of the light guide plate (5), the top of the guide plate (12) is clamped on the inner side of the bayonet (11), and the bottom of the guide plate (12) passes through the reflector (6) and extends to the bottom of the reflector (6).

6. The light leakage-proof backlight module according to claim 5, characterized in that: The iron plate (13) is welded to the bottom of the guide plate (12), the electromagnet (14) is installed on the inner side of the circuit board (3) by means of bolts, and the electromagnet (14) is connected to the iron plate (13) by means of a spring (15).

7. The light leakage-proof backlight module according to claim 6, characterized in that: The circuit board (3) is provided with a through opening (16), the through opening (16) is located on both sides of the electromagnet (14), the bottom of the circuit board (3) is bonded to the baffle (17), and the bottom of the baffle (17) is bonded to the top of the bottom plate (1).

8. The light leakage prevention backlight module according to claim 7, characterized in that: The baffle (17) is located on one side of the through opening (16), and both sides of the guide plate (12) are coated with a reflective film.

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