Backlight source capable of uniformly emitting light

Abstract

The utility model discloses a backlight source with uniform light emitting, which relates to the technical field of backlight sources and comprises a shell, a clamping groove is arranged in a cavity of the shell, a backlight source module is clamped in the clamping groove, the backlight source module comprises a shading mounting shell, and a first mounting groove and a second mounting groove are arranged in a cavity of the shading mounting shell. An LED lamp source is fixedly connected in the first mounting groove, and a reinforced light guide plate is fixedly connected in the second mounting groove; the bottom of the reinforced light guide plate is fixedly connected with a heat insulation type optical adhesive film, and the bottom of the heat insulation type optical adhesive film is fixedly connected with a reflector plate. According to the shell provided by the utility model, the heat dissipation effect is enhanced on the basis that the light emitting effect is enhanced and the light emitting is uniform, so that the problems that the light emitting is not uniform and the use is influenced due to the poor heat dissipation effect caused by non-uniform scattering when the light of the existing backlight source is propagated in the light guide plate are solved.

Description

Technical Field

[0001] This utility model relates to the field of backlight technology, specifically to a backlight with uniform light output. Background Technology

[0002] Backlights emit light through a light source, which is then processed by a series of optical components to distribute the light evenly behind the display area, providing uniform background light for the LCD screen. In this way, the LCD screen can display various images and text information by controlling the light transmittance of different pixels.

[0003] In existing backlights, the LED light sources are randomly distributed within the light-shielding mounting housing, with inconsistent spacing. This results in uneven light distribution as the light propagates within the light guide plate, easily creating localized bright spots or dark areas. It also makes it difficult to effectively guide the light out evenly. Furthermore, the surface microstructure has low reflection and refraction efficiency, failing to adequately alter the light propagation direction. Uneven scattering of light within the light guide plate leads to uneven light output and poor heat dissipation. The LED light sources and other components generate significant heat during operation, which cannot be dissipated promptly. Poor air circulation causes heat to accumulate inside the backlight, affecting the performance of optical components. For example, heat-induced deformation of the light guide plate alters the light propagation path, further exacerbating the uneven light output problem. Utility Model Content

[0004] In view of the problems existing in the current backlight source with uniform light output, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a backlight source with uniform light output, which solves the problem that the light from existing backlight sources is scattered unevenly when it propagates inside the light guide plate, resulting in uneven light output and poor heat dissipation, which affects the use.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A backlight source with uniform light output includes a housing. A snap-fit ​​groove is formed within the cavity of the housing, and a backlight module is snap-fitted therein. The backlight module includes a light-shielding mounting shell. A first mounting groove and a second mounting groove are formed within the cavity of the light-shielding mounting shell. An LED light source is fixedly connected to the first mounting groove, and a reinforcing light guide plate is fixedly connected to the second mounting groove. A heat-insulating optical film is fixedly connected to the bottom of the reinforcing light guide plate, and a reflective sheet is fixedly connected to the bottom of the heat-insulating optical film. A diffusion enhancement component is fixedly connected to the top of the reinforcing light guide plate. A light-shielding frame cover is snap-fitted to the top of the light-shielding mounting shell, and a protective film is fixedly connected to the top of the light-shielding frame cover through an opening. A light-transmitting protective cover plate is fixedly connected to the top of the housing through a snap-fit ​​limiting mechanism. Corresponding heat dissipation mechanisms are provided on the housing and the light-shielding mounting shell.

[0008] Preferably, the locking and limiting mechanism includes a positioning groove, a positioning plate, a limiting plate, a threaded limiting port, and a limiting bolt. Positioning grooves are provided at the top of both ends of the outer shell. Positioning plates are fixedly connected to the side walls of both ends of the light-transmitting protective cover. The positioning plates at both ends are inserted into the positioning grooves. Limiting plates are fixedly connected to the side walls of both ends of the outer shell. The positioning plates and limiting plates at both ends have corresponding threaded limiting ports, and the threaded ports are connected to limiting bolts.

[0009] Preferably, the heat dissipation mechanism includes a heat-conducting plate, a heat dissipation port, and heat dissipation fins. The bottom two ends of the light-shielding mounting shell are fixedly connected to the heat-conducting plate through openings. The bottom of the shell is provided with a heat dissipation port. The top of the heat-conducting plates at both ends are fixedly connected to the bottom of the LED light source. The bottom of the heat-conducting plates at both ends passes through the heat dissipation port and is fixedly connected to heat dissipation fins.

[0010] Preferably, the diffusion increment component includes a reflective polarizer, with prism sheets fixedly connected to both ends of the reflective polarizer, and diffuser sheets fixedly connected to the surfaces of the prism sheets at both ends.

[0011] Furthermore, the inner wall of the protective film is provided with an anti-dizziness coating.

[0012] Preferably, the reinforced light guide plate is an arc-shaped light guide plate, and an optical waveguide fiber mesh layer is fixedly connected inside the cavity.

[0013] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0014] 1. This utility model utilizes a reinforced light guide plate and a diffusion increment component. The reinforced light guide plate has an arc-shaped structure and is equipped with a fiber optic mesh layer, which can change the light propagation path and guide the light to propagate efficiently. The diffusion increment component is composed of a reflective polarizer, a prism sheet, and a diffuser sheet, which polarizes, refracts, converges, and diffuses the light, effectively solving the problem of uneven scattering of light inside the light guide plate, making the light emitted more uniformly, significantly improving the uniformity of backlight output, and meeting the requirements of high-definition display.

[0015] 2. This utility model utilizes a heat dissipation mechanism to effectively enhance the heat dissipation of the internal LED light source. The heat-conducting plate is in direct contact with the bottom of the LED light source, quickly absorbing heat and transferring it to the heat dissipation fins through the heat dissipation vents. The heat dissipation fins increase the heat dissipation area, accelerate the heat exchange with the outside air, reduce the internal temperature of the backlight, ensure the stable operation of the internal components of the backlight, and extend its service life.

[0016] 3. This utility model utilizes a snap-fit ​​limiting mechanism to ensure a stable connection between the light-transmitting protective cover and the outer shell. The positioning plate is inserted into the positioning groove for initial positioning, and the limiting bolt passes through the threaded limiting port to fix the positioning plate and the limiting plate, facilitating installation and disassembly. This makes it convenient for the assembly, maintenance, and repair of the backlight. At the same time, the protective film and the light-transmitting protective cover can prevent dust, moisture, etc. from entering the backlight. The anti-glare coating on the inner side of the protective film can reduce external light reflection, reduce glare, improve user experience, and extend the service life of the backlight. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

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

[0020] Figure 3 This is a three-dimensional sectional view of the diffusion increment component of this utility model;

[0021] Figure 4 This is a three-dimensional sectional view of the reinforced light guide plate of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Outer shell; 2. Snap-fit ​​slot; 3. Backlight module; 4. Light-shielding mounting shell; 5. First mounting slot; 6. Second mounting slot; 7. LED light source; 8. Reinforced light guide plate; 9. Heat-insulating optical film; 10. Reflective sheet; 11. Diffuser enhancement component; 12. Light-shielding frame cover; 13. Protective film; 14. Light-transmitting protective cover plate; 15. Positioning slot; 16. Positioning plate; 17. Limiting plate; 18. Threaded limiting port; 19. Limiting bolt; 20. Heat-conducting plate; 21. Heat dissipation port; 22. Heat dissipation fins; 23. Reflective polarizer; 24. Prism sheet; 25. Diffuser; 26. Optical waveguide fiber mesh layer. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] This utility model discloses a backlight source with uniform light output.

[0026] This utility model provides, for example Figure 1-4The backlight source shown includes a housing 1. The housing 1 has a snap-fit ​​groove 2 inside its cavity, and a backlight module 3 is snap-fitted therein. The backlight module 3 includes a light-shielding mounting shell 4. The light-shielding mounting shell 4 has a first mounting groove 5 and a second mounting groove 6 inside its cavity. An LED light source 7 is fixedly connected in the first mounting groove 5, and a reinforcing light guide plate 8 is fixedly connected in the second mounting groove 6.

[0027] A heat-insulating optical film 9 is fixedly connected to the bottom of the reinforced light guide plate 8, and a reflective sheet 10 is fixedly connected to the bottom of the heat-insulating optical film 9. A diffusion increment component 11 is fixedly connected to the top of the reinforced light guide plate 8. A light-shielding frame cover 12 is snapped onto the top of the light-shielding mounting shell 4, and a protective film 13 is fixedly connected to the top of the light-shielding frame cover 12 through an opening. A light-transmitting protective cover plate 14 is fixedly connected to the top of the outer shell 1 through a snap-fit ​​limiting mechanism. The outer shell 1 and the light-shielding mounting shell 4 are provided with corresponding heat dissipation mechanisms. By utilizing the reinforced light guide plate 8, light is distributed more evenly inside the light guide plate, reducing light loss during propagation and ensuring uniform light output. By utilizing the diffusion increment component 11, light is processed in all directions, effectively solving the problem of uneven light scattering inside the light guide plate, significantly improving the uniformity of backlight output, making the display brightness consistent, and providing a better visual effect to meet the requirements of high-definition display. The limiting mechanism ensures a secure connection between the light-transmitting protective cover 14 and the outer casing 1, while facilitating installation and disassembly. This also facilitates the assembly, maintenance, and repair of the backlight, reducing operating costs. The heat dissipation mechanism enhances the heat dissipation of the internal LED light source 7. The heat-insulating optical film 9 effectively isolates heat transfer, preventing heat conduction from affecting other components of the backlight and further ensuring the stable performance of the backlight. The reflective sheet 10 reflects light, improving light utilization, reducing light loss, and enhancing the luminous efficiency of the backlight. The protective film 13 and the light-transmitting protective cover 14 prevent dust and moisture from entering the backlight, protecting internal components and extending the lifespan of the backlight. This solves the problems of uneven light scattering during propagation within the light guide plate, resulting in uneven light output and poor heat dissipation that affect the use of existing backlights.

[0028] To facilitate quick installation and easy removal of the light-transmitting protective cover 14, such as Figure 1 and 2As shown, the locking and limiting mechanism includes a positioning groove 15, a positioning plate 16, a limiting plate 17, a threaded limiting port 18, and a limiting bolt 19. Positioning grooves 15 are provided at the top of both ends of the outer casing 1. Positioning plates 16 are fixedly connected to the side walls of both ends of the light-transmitting protective cover 14. The positioning plates 16 at both ends are inserted into the positioning grooves 15. Limiting plates 17 are fixedly connected to the side walls of both ends of the outer casing 1. The positioning plates 16 and the limiting plates 17 at both ends have corresponding threaded limiting ports 18, and are threadedly connected with limiting bolts 19. The locking and limiting mechanism utilizes the positioning grooves 15, positioning plates 16, limiting plates 17, threaded limiting ports 18, and limiting bolts 19. The snap-fit ​​limiting mechanism, consisting of plate 16, limiting plate 17, threaded limiting port 18, and limiting bolt 19, allows the positioning plate 16 to be inserted into the positioning groove 15 for initial positioning when installing the light-transmitting protective cover 14. Then, the positioning plate 16 and the limiting plate 17 are fixedly connected by the limiting bolt 19 passing through the threaded limiting port 18. This makes the connection between the light-transmitting protective cover 14 and the outer shell 1 more stable, facilitates installation and disassembly, and effectively prevents the light-transmitting protective cover 14 from shifting during use, ensuring the stability of the overall backlight structure.

[0029] To enhance the heat dissipation effect of LED light source 7, such as Figure 2 As shown, the heat dissipation mechanism includes a heat-conducting plate 20, a heat dissipation port 21, and heat dissipation fins 22. The bottom ends of the light-shielding mounting shell 4 are fixedly connected to the heat-conducting plate 20 through openings. The bottom of the shell 1 has a heat dissipation port 21. The tops of the heat-conducting plates 20 at both ends are fixedly connected to the bottom of the LED light source 7. The bottoms of the heat-conducting plates 20 at both ends pass through the heat dissipation port 21 and are fixedly connected to the heat dissipation fins 22. By using the heat dissipation mechanism composed of the heat-conducting plate 20, the heat dissipation port 21, and the heat dissipation fins 22, the heat generated by the LED light source 7 can be quickly transferred away. The heat-conducting plate 20 is in direct contact with the bottom of the LED light source 7, which can efficiently absorb heat. The heat is transferred to the heat dissipation fins 22 through the heat-conducting plate 20. The heat dissipation fins 22 increase the heat dissipation area, accelerate the heat exchange with the outside air, effectively reduce the internal temperature of the backlight, improve the heat dissipation effect of the backlight, and extend the service life of the internal components of the backlight.

[0030] To improve the uniformity of backlight output, such as Figure 2 and 3 As shown, the diffusion increment component 11 includes a reflective polarizer 23. Prism sheets 24 are fixedly connected to both ends of the reflective polarizer 23, and diffusers 25 are fixedly connected to the surfaces of the prism sheets 24. The reflective polarizer 23 can polarize the light and reduce the reflection loss of the light. The prism sheets 24 can refract and converge the light and adjust the direction of light propagation. The diffusers 25 can further diffuse the light evenly. Through the synergistic effect of the three, the light can be emitted more evenly after propagating inside the light guide plate, which effectively improves the light emission uniformity of the backlight and enhances the quality of the display image.

[0031] To reduce dizziness caused by reflected light, such as Figure 2 As shown, the inner wall of the protective film 13 is provided with an anti-glare coating. The anti-glare coating can effectively reduce the reflection of external light on the surface of the protective film 13, reduce the dizziness caused by reflected light, make the user more comfortable when viewing the display screen, and improve the user experience.

[0032] To achieve efficient propagation and reduce light loss, such as Figure 2 and 4 As shown, the reinforcing light guide plate 8 is an arc-shaped light guide plate, and an optical waveguide fiber mesh layer 26 is fixedly connected inside the cavity. By using the reinforcing light guide plate 8, which is set as an arc-shaped light guide plate, the propagation path of light can be changed, so that the light is more evenly distributed inside the light guide plate. The optical waveguide fiber mesh layer 26 can guide the light to propagate efficiently inside the light guide plate, reduce light loss, and further improve the light output uniformity and light transmission efficiency of the backlight.

[0033] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A backlight with uniform light output comprising a housing (1), characterized in that The cavity of the shell (1) is provided with a clamping groove (2), and a backlight module (3) is clamped therein, the backlight module (3) comprises a light-shielding mounting shell (4), the cavity of the light-shielding mounting shell (4) is provided with a first mounting groove (5) and a second mounting groove (6), the first mounting groove (5) is fixedly connected with an LED light source (7), and the second mounting groove (6) is fixedly connected with a reinforced light guide plate (8). The bottom of the reinforced light guide plate (8) is fixedly connected with a heat-insulating optical adhesive film (9), the bottom of the heat-insulating optical adhesive film (9) is fixedly connected with a reflective sheet (10), the top of the reinforced light guide plate (8) is fixedly connected with a diffusion increment assembly (11), the top of the light-shielding mounting shell (4) is clamped with a light-shielding frame cover (12), the top of the light-shielding frame cover (12) is fixedly connected with a protective film (13) through an opening, the top of the shell (1) is fixedly connected with a light-transmitting protective cover plate (14) through a clamping limiting mechanism, and the shell (1) and the light-shielding mounting shell (4) are provided with corresponding heat dissipation mechanisms.

2. The backlight of claim 1, wherein, The clamping limiting mechanism comprises positioning grooves (15), positioning plates (16), limiting plates (17), threaded limiting openings (18) and limiting bolts (19), the top of both ends of the shell (1) is provided with a positioning groove (15), the light-transmitting protective cover plate (14) is fixedly connected with a positioning plate (16) on both end side walls, the positioning plate (16) is inserted into the positioning groove (15), the limiting plate (17) is fixedly connected to the side wall of both ends of the shell (1), the positioning plate (16) and the limiting plate (17) are provided with corresponding threaded limiting openings (18), and the limiting bolts (19) are threadedly connected.

3. The backlight of claim 1, wherein, The heat dissipation mechanism comprises heat-conducting plates (20), heat dissipation openings (21) and heat dissipation fins (22), the bottom of both ends of the light-shielding mounting shell (4) is fixedly connected with a heat-conducting plate (20) through an opening, the bottom of the shell (1) is provided with a heat dissipation opening (21), the top of both ends of the heat-conducting plate (20) is fixedly connected with the bottom of the LED light source (7), the bottom of both ends of the heat-conducting plate (20) passes through the heat dissipation opening (21), and is fixedly connected with a heat dissipation fin (22).

4. The backlight of claim 1, wherein, The diffusion increment assembly (11) comprises a reflective polarizing sheet (23), the surfaces of both ends of the reflective polarizing sheet (23) are fixedly connected with prism sheets (24), and the surfaces of both ends of the prism sheets (24) are fixedly connected with diffusion sheets (25).

5. The backlight of claim 1, wherein, The inner side wall of the protective film (13) is provided with an anti-dazzle coating.

6. The backlight of claim 1, wherein, The reinforced light guide plate (8) is an arc-shaped light guide plate, and a light wave guide fiber net type line layer (26) is fixedly connected in the cavity.

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