Backlight module capable of preventing light leakage

Abstract

The utility model is suitable for the technical field of backlight modules, and provides a light leakage prevention backlight module which comprises an injection molding bottom frame. The reflector plate is arranged in the injection molding bottom frame; the light guide plate is mounted at the top of the reflector plate; the lower diffusion sheet is arranged at the top of the light guide plate, and a lower prismatic lens and an upper prismatic lens are arranged at the top of the lower diffusion sheet; the upper diffusion sheet is mounted at the top of the upper prismatic lens; and the injection molding top frame is mounted at the top of the injection molding bottom frame. The light leakage prevention backlight module provided by the scheme is relatively good in protection and sealing effect, so that edge light leakage can be effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model belongs to backlight module technical field especially relates to a light leakage prevention backlight module. BACKGROUND

[0002] Backlight module is one of the key components of liquid crystal display panel, the function is in the supply sufficient brightness and the light source of distribution uniformity, so that it can display image normally, so-called backlight is located behind a kind of light source of liquid crystal display, its luminous effect will directly influence liquid crystal display module visual effect, liquid crystal itself does not emit light, and it shows figure or character is the result of its light modulation.

[0003] At present, backlight module is generally connected rigidly with liquid crystal display through bolt and the like mounting accessory, and there is a certain gap gap at its connecting portion, and the light emitted from light source can leak out from the gap, when looking from side, user is easy to see light leakage phenomenon, which affects user experience. UTILITY MODEL CONTENT

[0004] The utility model provides a light leakage prevention backlight module, to solve the problem of light leakage caused by the gap between the backlight module and the liquid crystal display rigid connection.

[0005] To solve the above problems, the utility model is realized in this way, a kind of light leakage prevention backlight module, it include: injection molded bottom frame;Reflective sheet, the reflective sheet is set in the injection molded bottom frame;Light guide plate, the light guide plate is installed at the top of the reflective sheet;Lower diffusion sheet, the lower diffusion sheet is set at the top of the light guide plate, and the top of the lower diffusion sheet is equipped with lower prism sheet and upper prism sheet;Upper diffusion sheet, the upper diffusion sheet is installed at the top of the upper prism sheet;Injection molded top frame, the injection molded top frame is installed at the top of the injection molded bottom frame, and the top inner wall of the injection molded top frame is in contact with the top of the upper diffusion sheet, and the top of the injection molded top frame is equipped with display port;Protective assembly, the protective assembly is set at the top of the injection molded top frame, and the protective assembly is used for protecting the structure between the injection molded bottom frame and the injection molded top frame.

[0006] Preferably, the protective assembly includes protective plate, limiting plate and sealing rubber ring, the protective plate is installed at the top of the injection molded top frame, the limiting plate is fixed at the bottom of the protective plate and can extend into the display port, the limiting plate is in contact with the inner wall of the display port and can be in contact with the top of the upper diffusion sheet, the sealing rubber ring is installed at the top of the injection molded top frame, the sealing rubber ring can be in contact with the bottom of the protective plate, and the sealing rubber ring can also be in contact with the liquid crystal display.

[0007] Preferably, the bottom of the protective plate is provided with a limiting groove, a double-sided adhesive tape is arranged in the limiting groove, and the sealing rubber ring can extend into the limiting groove and be adhered to the double-sided adhesive tape.

[0008] Preferably, the injection-molded bottom frame and the injection-molded top frame are both sleeved with the same clasp, the two sides of the injection-molded bottom frame are both provided with a plurality of light transmission ports, the light transmission ports are used for transmitting light sources, and the light transmission ports are also used for discharging waste gas.

[0009] Preferably, one side of the clasp is provided with a threaded port, the threaded port is located on the same horizontal line as any one of the light transmission ports, a lighting lamp is threadedly installed in the threaded port, and a threaded cylinder is fixed to the outer wall of the lighting lamp.

[0010] Preferably, the limiting plate is made of soft silica gel, and the two sides of the protective plate are both provided with pinch pieces, and the two pinch pieces are both provided with anti-skid lines.

[0011] Preferably, the inner wall of the clasp, the outer wall of the injection-molded bottom frame and the outer wall of the injection-molded top frame are all provided with glue grooves, and glue is injected between the clasp, the injection-molded bottom frame and the injection-molded top frame.

[0012] Compared with the related art, the backlight module with light leakage prevention provided by the utility model has the following beneficial effects:

[0013] Compared with the prior art, the backlight module with light leakage prevention provided by the utility model can protect the reflection sheet, the light guide plate, the lower diffusion sheet, the lower prism sheet, the upper prism sheet and the upper diffusion sheet located in the interior by means of the injection-molded bottom frame cooperating with the injection-molded top frame, prevent the light leakage phenomenon caused by the mutual separation of the components, increase the tightness of the connection of the components, protect the backlight module not in use by means of the protection assembly, prevent the pollution or damage of the module by foreign matters in the external environment, use the lighting lamp as a light source to make the backlight module emit light, prevent the light leakage caused by the gap between the backlight module and the display by means of the sealing rubber ring, and increase the sealing performance of the device. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a front view of the backlight module with light leakage prevention provided by the utility model;

[0015] Figure 2 is Figure 1 is an enlarged structure schematic view of part A shown in the figure;

[0016] Figure 3 is a front view of the backlight module with light leakage prevention provided by the utility model after assembly of the components;

[0017] Figure 4 is a three-dimensional sectional structure schematic view of the protective plate and the limiting plate in the utility model.

[0018] Figure numerals: 1. injection-molded bottom frame; 2. reflective sheet; 3. light guide plate; 4. lower diffuser; 5. lower prism sheet; 6. upper prism sheet; 7. upper diffuser; 8. injection-molded top frame; 9. display port; 10. protective plate; 11. limit plate; 12. sealing rubber ring; 13. light-transmitting port; 14. retaining ring; 15. threaded port; 16. lighting lamp; 17. limit groove. DETAILED DESCRIPTION

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein in the specification of the application are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the description of the above-mentioned drawings, as well as any variations thereof, are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order; the terms "inside", "outside", "left", and "right" indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention.

[0020] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] The present invention provides a backlight module that prevents light leakage. Figures 1-4 As shown, the light leakage prevention backlight module includes: an injection-molded bottom frame 1; a reflective sheet 2, which is arranged in the injection-molded bottom frame 1; a light guide plate 3, which is installed on the top of the reflective sheet 2; a lower diffuser 4, which is arranged on the top of the light guide plate 3, and the top of the lower diffuser 4 is provided with a lower prism sheet 5 and an upper prism sheet 6; an upper diffuser 7, which is installed on the top of the upper prism sheet 6; an injection-molded top frame 8, which is installed on the top of the injection-molded bottom frame 1, and the top inner wall of the injection-molded top frame 8 is in contact with the top of the upper diffuser 7, and the top of the injection-molded top frame 8 is provided with a display port 9; a protective component, which is arranged on the top of the injection-molded top frame 8, and the protective component is used to protect the structure located between the injection-molded bottom frame 1 and the injection-molded top frame 8.

[0022] In this embodiment, the injection molded bottom frame 1 serves as the bottom support structure of the backlight module, providing a stable foundation for the entire module. Its design allows for the orderly installation of other components such as the reflector sheet 2 and light guide plate 3, ensuring the stability of the overall structure. The main function of the reflector sheet 2 is to reflect light that leaks from the edges of the light guide plate 3, redirecting it back into the light guide plate 3, thereby reducing light loss and improving backlight uniformity. This helps to reduce the phenomenon of direct light leakage outside the module. The light guide plate 3 is one of the core components in the backlight module, responsible for evenly distributing the light emitted by the light source throughout the backlight area. It is crucial for achieving high-quality backlight effects. The lower diffusion sheet 4, lower prism sheet 5, and upper prism sheet 6 work together to further diffuse and align the light, improving the optical performance of the backlight module. The prism sheet guides the direction of light through its unique microstructure, enhancing brightness and viewing angle uniformity. The upper diffusion sheet 7 continues to diffuse the light, ensuring the softness and uniformity of the final output light, reducing glare and bright spot phenomena. The injection molded top frame 8 not only provides an upper closed structure for the backlight module but also effectively reduces light leakage caused by gaps through its top inner wall and the close contact with the upper diffusion sheet 7. The top display opening 9 allows light to pass through and illuminate the liquid crystal display panel. The main function of the protective assembly is to protect all optical components located between the injection molded bottom frame 1 and the injection molded top frame 8 when the backlight module is not in use, preventing external impact, dust, and other damage, thereby prolonging the service life of the backlight module and maintaining its optical performance.

[0023] In further preferred embodiments of the present utility model, the protective assembly includes a protective plate 10, a limiting plate 11, and a sealing rubber ring 12. The protective plate 10 is installed on the top of the injection molded top frame 8. The limiting plate 11 is fixed to the bottom of the protective plate 10 and can extend into the display opening 9. The limiting plate 11 is in contact with the inner wall of the display opening 9 and can be in contact with the top of the upper diffusion sheet 7. The sealing rubber ring 12 is installed on the top of the injection molded top frame 8. The sealing rubber ring 12 can be in contact with the bottom of the protective plate 10. The sealing rubber ring 12 can also be in contact with the liquid crystal display.

[0024] In this embodiment, the protective plate 10 serves as the outermost protective barrier of the backlight module, preventing external objects from directly contacting sensitive components inside the backlight module, such as optical films, thereby protecting them from physical damage, improving the overall durability and safety of the backlight module, and prolonging its service life. The limiting plate 11 restricts the displacement of the protective plate 10, enhancing the structural stability of the backlight module. The sealing rubber ring 12 provides additional sealing effect, ensuring the tight connection between the protective plate 10 and the injection molded top frame 8, preventing light and dust from entering through the gap. At the same time, the sealing rubber ring 12 can also be in contact with the liquid crystal display, forming a seal between the gap between the backlight module and the liquid crystal display panel, further reducing light leakage.

[0025] The further preferred embodiment of the utility model further provides a limiting groove 17 is equipped on the bottom of the protection board 10, double -sided adhesive tape is equipped in the limiting groove 17, the sealant ring 12 can extend to the limiting groove 17 with double -sided adhesive tape is adhered.

[0026] In the embodiment, through the design of limiting groove 17, can ensure that sealant ring 12 can be accurately placed in the predetermined position when installing, avoid the problem of sealing not strictly caused by misplacement or deviation, improve the accuracy and efficiency of assembly, simultaneously strengthen the overall sealing performance of backlight module, double -sided adhesive tape has strong adhesion, can firmly paste sealant ring 12 in limiting groove 17, form tight sealing connection, effectively prevent the problem of sealing failure caused by vibration or external force, improve the stability and durability of backlight module.

[0027] The further preferred embodiment of the utility model further provides a limiting groove 17 is equipped on the bottom of the protection board 10, double -sided adhesive tape is equipped in the limiting groove 17, the sealant ring 12 can extend to the limiting groove 17 with double -sided adhesive tape is adhered.

[0028] In the embodiment, through the design of limiting groove 17, can ensure that sealant ring 12 can be accurately placed in the predetermined position when installing, avoid the problem of sealing not strictly caused by misplacement or deviation, improve the accuracy and efficiency of assembly, simultaneously strengthen the overall sealing performance of backlight module, double -sided adhesive tape has strong adhesion, can firmly paste sealant ring 12 in limiting groove 17, form tight sealing connection, effectively prevent the problem of sealing failure caused by vibration or external force, improve the stability and durability of backlight module.

[0029] The further preferred embodiment of the utility model further provides a limiting groove 17 is equipped on the bottom of the protection board 10, double -sided adhesive tape is equipped in the limiting groove 17, the sealant ring 12 can extend to the limiting groove 17 with double -sided adhesive tape is adhered.

[0030] In the embodiment, the threaded port 15 provides a standard threaded interface for mounting and fixing the illuminating lamp 16, which makes the installation and replacement of the illuminating lamp 16 simple and fast, and guarantees the stability and reliability of the connection. By additionally providing the threaded port 15, the backlight module not only has the original backlight function, but also has an additional lighting function, thereby improving the use value and flexibility. The illuminating lamp 16, as an additional component of the backlight module, can provide additional lighting effect when needed, and can be switched according to actual needs to provide users with more diversified visual experience. The threaded cylinder simplifies the installation process of the illuminating lamp 16, improves the installation efficiency, and enhances the connection strength between the illuminating lamp 16 and the snap ring 14, thereby prolonging the service life.

[0031] In the further preferred embodiment of the utility model, the limiting plate 11 is made of soft silica gel material, and the two sides of the protective plate 10 are provided with pinch pieces, and the two pinch pieces are provided with anti-skid lines.

[0032] In the embodiment, the soft silica gel material has good flexibility and elasticity, can be closely attached to the inner wall of the display port 9 and the top of the upper diffusion sheet 7, effectively reduces the light leakage problem caused by the gap, and has good wear resistance and corrosion resistance, thereby prolonging the service life of the limiting plate 11. The limiting plate 11 made of soft silica gel material not only improves the light leakage prevention capability of the backlight module, but also enhances the structural stability and durability. In addition, due to the softness of the soft silica gel, the limiting plate 11 is easier to operate during installation and disassembly, thereby reducing the maintenance cost. The pinch piece provides a part for users to easily grasp and operate, so that the protective plate 10 can be easily disassembled or installed when needed. In addition, the anti-skid lines arranged on the pinch piece increase the friction between the hands and the pinch piece, thereby preventing operation errors or accidental injuries caused by hand slipping.

[0033] In the further preferred embodiment of the utility model, the inner wall of the snap ring 14, the outer wall of the injection molded bottom frame 1 and the outer wall of the injection molded top frame 8 are all provided with glue grooves, and the snap ring 14, the injection molded bottom frame 1 and the injection molded top frame 8 are filled with glue.

[0034] In the embodiment, the glue groove provides a precise filling space for the glue, ensures that the glue can be uniformly distributed between the contact surfaces to form a tight bonding layer, and simplifies the glue filling process and improves the bonding firmness and sealing performance. The introduction of the glue groove makes the connection between the components of the module more compact and stable, effectively prevents loosening or separation caused by vibration or external force, and significantly improves the structural stability and sealing performance of the backlight module by filling the glue. This design not only prolongs the service life of the module, but also guarantees the normal operation of the module under various environmental conditions.

[0035] In conclusion, compared with the related art, the device can protect the reflective sheet 2, the light guide plate 3, the lower diffusion sheet 4, the lower prism sheet 5, the upper prism sheet 6 and the upper diffusion sheet 7 inside by setting the injection-molded bottom frame 1 cooperating with the injection-molded top frame 8, prevent the light leakage phenomenon caused by the mutual separation of the components, increase the tightness of the connection of the components, protect the backlight module not in use by setting the protection component, prevent the pollution or damage of the module by the foreign matters from the outside, make the backlight module emit light by setting the illuminating lamp 16 as the light source, prevent the light leakage caused by the gap between the backlight module and the display by setting the sealing rubber ring 12, and increase the sealing performance of the device.

[0036] In several embodiments provided in the application, it should be understood that the disclosed device can be implemented in other ways.

[0037] The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the protection scope of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add or delete the features in the embodiments of the present application according to the circumstances without creative labor, so as to obtain different, but essentially not deviating from the concept of the present application, other technical solutions. These technical solutions also belong to the scope of the present application.

Claims

1. A backlight module for preventing light leakage, characterized in that: include: Injection molded bottom frame; A reflective sheet, the reflective sheet being arranged in the injection-molded bottom frame; A light guide plate, the light guide plate being mounted on top of the reflective sheet; A lower diffuser sheet, the lower diffuser sheet being arranged on top of the light guide plate, and a lower prism sheet and an upper prism sheet being arranged on the top of the lower diffuser sheet; an upper diffusion sheet, the upper diffusion sheet being mounted on top of the upper prism sheet; An injection-molded top frame is mounted on the top of the injection-molded bottom frame, the top inner wall of the injection-molded top frame contacts the top of the upper diffuser, and a display port is provided on the top of the injection-molded top frame; A protective component is arranged on the top of the injection-molded top frame, and is used to protect the structure located between the injection-molded bottom frame and the injection-molded top frame.

2. The light leakage-proof backlight module according to claim 1, wherein: The protective assembly includes a protective plate, a limiting plate and a sealing ring. The protective plate is installed on the top of the injection-molded top frame. The limiting plate is fixed to the bottom of the protective plate and can extend into the display port. The limiting plate contacts the inner wall of the display port and can contact the top of the upper diffuser. The sealing ring is installed on the top of the injection-molded top frame. The sealing ring can contact the bottom of the protective plate and can also contact the liquid crystal display.

3. The light leakage-proof backlight module according to claim 2, wherein: A limiting groove is provided at the bottom of the protective plate, a double-sided adhesive tape is provided in the limiting groove, and the sealing rubber ring can extend into the limiting groove and adhere to the double-sided adhesive tape.

4. The light leakage-proof backlight module according to claim 1, wherein: The injection molded bottom frame and the injection molded top frame are both sleeved with a same clamping ring. Both sides of the injection molded bottom frame are provided with a plurality of light-transmitting openings, which are used to transmit light sources and discharge exhaust gas.

5. The light leakage-proof backlight module according to claim 4, wherein: A threaded opening is provided on one side of the clamping ring. The threaded opening and any one of the light-transmitting openings are located on the same horizontal line. A lighting lamp is installed on the inner thread of the threaded opening. A threaded barrel is fixed on the outer wall of the lighting lamp.

6. The light leakage-proof backlight module according to claim 2, wherein: The limiting plate is made of soft silicone material, and pinching pieces are provided on both sides of the protective plate, and anti-slip grooves are provided on the two pinching pieces.

7. The light leakage-proof backlight module according to claim 4, wherein: Glue grooves are provided on the inner wall of the clamping ring, the outer wall of the injection-molded bottom frame and the outer wall of the injection-molded top frame, and glue is poured between the clamping ring, the injection-molded bottom frame and the injection-molded top frame.

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