A backlight module, assembly method and display

Abstract

This application provides a backlight module, an assembly method, and a display. The backlight module includes at least a light guide plate with a protrusion on one side, a first optical module, and a second optical module including multiple optical films. One side of the first optical module is movably connected to the protrusion, and the other side is connected to the light guide plate on the opposite side of the protrusion via adhesive. The optical films on the same side are bonded together with adhesive to form a first integral structure, with the bonded side close to the protrusion. The first and second sides of the first integral structure are respectively fixed to the light guide plate and the first optical module with adhesive, and the fixed side and the bonded side are located on the same side. This application prevents the first and second optical modules from arching, thus avoiding friction between the backlight module and other parts. Furthermore, only adhesive is needed for assembly, eliminating the need for additional hardware materials. Assembly is simple, low-cost, and provides good sealing, while also offering wide applicability.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a backlight module, assembly method and display. Background Technology

[0002] One existing backlight module solution positions the optical film using a hole-shaft mating method and adds components to press the film. This method cannot fundamentally solve the problem of film arching, and it also increases the amount of material, making assembly complex and resulting in poor sealing.

[0003] Another backlight module solution involves designing a stud-like structure on the backlight housing, with an optical film extending out to fit into this structure, and additional components for fixation, acting like a nut. This solution can only be used on die-cast backlight housings, limiting its applicability. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a backlight module, assembly method, and display that is easy to assemble and whose optical films do not warp.

[0005] Specifically, this application provides a backlight module, which includes at least a light guide plate, a first optical module and a second optical module, wherein a protrusion is provided on one side of the light guide plate.

[0006] One side of the first optical module is movably connected to the protrusion, and the other side is connected to the light guide plate on the other side of the protrusion via adhesive.

[0007] The second optical module includes multiple optical films, and the same side of each optical film is bonded together to form a first integral structure by the fixing adhesive, and the bonding side is close to the protrusion.

[0008] The first side and the second side of the first integral structure are respectively fixed to the light guide plate and the first optical module by the fixing adhesive, and the fixing side and the bonding side are located on the same side.

[0009] In the above technical solution, there is no significant relative movement between the upper and lower surfaces of the fixing adhesive that fixes the first optical module to the other side of the protrusion. The first optical module will not bulge. At the same time, since each layer of optical film of the second optical module is only fixed on one side, the other side is in a free state and will not bulge. This ensures that the overall backlight module will not have friction problems with other parts. Furthermore, this application only requires fixing adhesive to complete the fixing and assembly, without the need for additional hardware materials. The assembly is simple, the cost is low, and the sealing performance is good. It can also be applied to any backlight shell and has a wide range of adaptability.

[0010] Furthermore, each optical film layer is aligned and bonded to the light guide plate at a preset position, or bonded in a stepped manner.

[0011] In the above technical solution, the optical films and light guide plates are aligned or stepped, which significantly improves the overall quality and performance of the backlight module by enhancing optical performance, assembly accuracy, structural stability, optical effect, and application flexibility of the optical films. This enables the backlight module to provide better display effects, more reliable performance, and higher assembly accuracy in practical applications.

[0012] Furthermore, it also includes a third optical module and a frame; the third optical module and the frame are sequentially disposed on the side of the light guide plate away from the second optical module.

[0013] Furthermore, the first optical module, the second optical module, the light guide plate, and the third optical module form a second integrated structure, which is located inside the frame.

[0014] In the above technical solution, the various modules are combined and connected and placed inside the frame, which can effectively protect the optical components from external physical impacts and environmental factors such as dust and moisture, thus extending the service life of the equipment.

[0015] Furthermore, the two sides of the third optical module are connected to the side of the light guide plate away from the second optical module and the frame by adhesive.

[0016] In the above technical solution, the third optical module is connected to the light guide plate and the frame by fixing adhesive, which can ensure the stability of the position of the third optical module, making it difficult to move or tilt, and helps to maintain the accuracy and consistency of the optical system.

[0017] Furthermore, the first thermal expansion coefficient of the first optical module is the same as the second thermal expansion coefficient of the light guide plate, or the first thermal expansion coefficient is greater than the first preset threshold of the second thermal expansion coefficient, or the first thermal expansion coefficient is less than the second preset threshold of the second thermal expansion coefficient.

[0018] In the above technical solution, the first optical module and the light guide plate have the same or similar coefficients of thermal expansion, and their dimensions in two directions are almost the same. When the temperature changes, their elongation or shortening can be considered to be consistent. Therefore, the transmission of thermal stress between the two components will be reduced, thereby reducing the structural stress caused by the difference in thermal expansion, and thus maintaining the structural integrity and functional stability of the optical system.

[0019] Furthermore, it also includes a light source, which is located on the side of the protrusion away from the second optical module.

[0020] In the above technical solution, the light source is set on the side of the protrusion away from the second optical module, which can effectively utilize the internal space of the equipment and make it easier for maintenance personnel to access and replace the light source. The position of the light source will not interfere with the disassembly and maintenance of the optical module, thus improving the convenience of maintenance.

[0021] Based on the same concept, this application also provides a method for assembling a backlight module, including the following steps:

[0022] S1: Provides a light guide plate, a first optical module and a second optical module, wherein the light guide plate has a protrusion on one side and the second optical module includes a multilayer optical film.

[0023] S2: Multilayer optical films are sequentially stacked and bonded to the light guide plate using adhesive; wherein the bonding side is close to the protrusion.

[0024] S3: Connect one side of the first optical module to the other side of the light guide plate relative to the protrusion using adhesive, and connect the first optical module to the second side of the first integral structure using adhesive, while movably connecting the other side of the first optical module to the protrusion.

[0025] In the above technical solution, the use of fixing adhesive can ensure that the multi-layer optical film forms a stable overall structure, which helps to improve the structural integrity and stability of the optical module, and no additional hardware is required to complete the fixing, which can also reduce costs to a certain extent; at the same time, the above assembly design does not require a middle frame, silicone block and light-shielding tape. The first optical module presses the second optical module onto the light guide plate, and additional auxiliary materials can be eliminated to achieve self-fixation.

[0026] Furthermore, since the adhesive that holds the first optical module in place will not move significantly, the first optical module will not bulge. Also, since each layer of optical film is only fixed on one side, leaving the other side free, it will not bulge either. This ensures that the overall backlight module will not experience friction with other components.

[0027] Furthermore, before performing step S1, the following steps are also included:

[0028] Provides a third optical module and housing.

[0029] The third optical module is connected to the light guide plate on the side away from the second optical module and the frame by means of adhesive; wherein the first optical module, the second optical module, the light guide plate and the third optical module form a second integral structure, and the second integral structure is located inside the frame.

[0030] In the above technical solution, the third optical module is connected to the light guide plate and the frame by fixing adhesive, which simplifies the assembly process. This design reduces the need for complex mechanical connections and improves assembly efficiency.

[0031] Based on the same concept, this application also provides a display, the display including a display panel and the backlight module, the display panel being disposed on the backlight module.

[0032] Compared with the prior art, the beneficial effects of this application are as follows:

[0033] This application provides a backlight module, including at least a light guide plate, a first optical module, and a second optical module. A protrusion is provided on one side of the light guide plate. One side of the first optical module is movably connected to the protrusion, and the other side is connected to the other side of the light guide plate opposite to the protrusion via adhesive. The second optical module includes multiple optical films, with each optical film layer bonded together on the same side via adhesive to form a first integral structure, and the bonded side being close to the protrusion. The first side and the second side of the first integral structure are respectively fixed to the light guide plate and the first optical module via adhesive, and the fixed side and the bonded side are located on the same side.

[0034] The design of this application ensures that neither the first nor the second optical module will bulge, thus preventing the overall backlight module from rubbing against other parts. Furthermore, this application only requires adhesive to complete the fixed assembly, without the need for additional hardware materials. The assembly is simple, low-cost, and has good sealing performance. It can also be applied to any backlight shell, making it highly adaptable. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the backlight module described in Embodiment 1.

[0036] Figure 2 This is a schematic diagram of the high-temperature simulation test results described in Example 1.

[0037] Figure 3 This is a flowchart of the assembly method for the backlight module described in Embodiment 2.

[0038] Figure 4 This is a schematic diagram of the light guide plate fixing method described in Embodiment 2.

[0039] Figure 5 This is a schematic diagram of the mid-frame scheme described in Embodiment 2.

[0040] Figure 6 This is a schematic diagram of the frameless solution described in Embodiment 2.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1-Light guide plate, 2-First optical module, 3-Second optical module, 4-Protrusion, 5-Fixing adhesive, 6-Third optical module, 7-Frame, 8-Light source. Detailed Implementation

[0043] The following detailed description, in conjunction with specific embodiments and accompanying drawings, describes a backlight module, assembly method, and display according to this application.

[0044] Example 1:

[0045] Please see Figure 1 This application provides a backlight module, which includes at least a light guide plate 1, a first optical module 2 and a second optical module 3, wherein a protrusion 4 is provided on one side of the light guide plate 1.

[0046] In this embodiment, a protrusion 4 is designed in the light guide plate 1, which can serve as a fixing point for other optical modules, light sources 8 and other components, ensuring the structural stability of the entire backlight module, thereby reducing component displacement caused by vibration or impact, and thus improving the reliability and durability of the backlight module.

[0047] One side of the first optical module 2 is movably connected to the protrusion 4, and the other side is connected to the light guide plate 1 on the other side of the protrusion 4 via adhesive 5.

[0048] In this embodiment, the fixing adhesive 5 can be glue or tape; the glue can be acrylic glue, which has high bonding strength and transparency, is suitable for applications requiring optical transparency, and usually dries quickly and has good UV resistance; the tape can be, for example, double-sided tape or high-temperature tape. Double-sided tape is easy to use and quick to install, and is suitable for applications requiring transparent bonding, while high-temperature tape can withstand high temperature changes and is suitable for applications requiring high temperature resistance in backlight modules.

[0049] There are no restrictions on the specific type of adhesive or tape used here, and those skilled in the art can choose according to the actual application requirements.

[0050] When selecting adhesives or tapes, those skilled in the art need to ensure the transparency of the adhesives or tapes to avoid interfering with light propagation. They also need to select adhesives or tapes that are resistant to high temperatures to cope with possible temperature changes. In addition, they need to select products with sufficient bonding strength according to actual needs to ensure the stability of the light guide plate 1. Furthermore, they need to select the appropriate curing time type according to the production requirements to improve production efficiency.

[0051] Furthermore, the height of the adhesive 5 that bonds the first optical module 2 and the light guide plate 1 can be adjusted in conjunction with the injection molding of the light guide plate 1.

[0052] In addition, since the fixing adhesive 5 does not have significant relative movement with respect to the upper and lower surfaces of the first optical module 2 and the light guide plate 1, the first optical module 2 will not bulge.

[0053] It should be noted that the first optical module 2 is an optical film, such as a dual brightness enhancement film (DBEF), which can effectively enhance the brightness of the backlight, so that the display can still maintain a clear visual effect under high brightness, and can also improve the contrast of the display, making blacks deeper and whites brighter, thereby improving the visual effect of the image.

[0054] Furthermore, the adhesive 5 used to bond the first optical module 2 and the light guide plate 1 can be a single piece or a segmented piece.

[0055] The whole-section setting can ensure a consistent adhesive layer thickness, provide a stable bonding effect, and make the coating process simpler with fewer operation steps, thereby reducing bubbles and voids caused by uneven local coating. The segmented setting can adjust the bonding strength and properties as needed, while better adapting to the slight deformation or tolerance of the components, and improving the docking accuracy of the first optical module 2 and the light guide plate 1.

[0056] The second optical module 3 includes multiple optical films, and the same side of each optical film is bonded together by the fixing adhesive 5 to form a first integral structure, and the bonding side is close to the protrusion 4.

[0057] In this embodiment, the optical films closest to the first optical module can be, in sequence, a first brightness enhancement film, a second brightness enhancement film (BEF, Brightness Enhancement Film), and a diffuser.

[0058] The brightness enhancement film increases the light output of the display by changing the direction of light propagation and scattering, thereby improving the brightness and clarity of the display effect and enhancing the overall brightness and visibility of the display.

[0059] The working principle of a diffuser is to change the direction of light propagation in various ways, so that the light becomes more uniform after passing through the diffuser. Common diffuser materials include frosted glass, plastic film or optical elements with microstructures, which can be selected by those skilled in the art according to the actual application requirements.

[0060] Furthermore, the adhesive 5 used to bond the optical films is the same as described above and will not be repeated here; the adhesive side is placed near the protrusion 4 so that the other end of the first optical module 2 can be better fixed.

[0061] Since each optical film is fixed at only one end, while the other end is completely free, the problem of the film arching or deforming due to internal stress or uneven adhesive force can be avoided. Naturally, it will not arch, which helps to maintain the flatness and stability of the backlight module. The entire backlight module will not have friction problems with other parts of the display assembly, thereby improving the reliability and service life of the backlight module.

[0062] Furthermore, this design simplifies the assembly process, reduces production costs, and minimizes the complexity of maintenance. Due to the asymmetrical bonding at both ends of the diaphragm, the diaphragm can maintain a stable shape under stress and is not affected by deformation caused by external factors, thus exhibiting better performance under dynamic or static conditions. This bonding and fixing method effectively solves the stability problem of optical diaphragms, improves the overall manufacturability and functionality of the backlight module, and reduces friction and potential damage risks.

[0063] The first side and the second side of the first integral structure are respectively fixed to the light guide plate 1 and the first optical module 2 by the fixing adhesive 5, and the fixing side and the bonding side are located on the same side.

[0064] In this embodiment, the fixing adhesive 5 for fixing the structure of the second integral is the same as described above, and will not be repeated here.

[0065] Both sides of the connection are on the same side to ensure that, like each layer of optical modules, only one end is fixed, avoiding diaphragm arching and simplifying the assembly process.

[0066] Furthermore, each optical film layer is aligned and bonded to the light guide plate 1 at a preset position, or bonded in a stepped manner.

[0067] In the above technical solution, each layer of optical film is aligned with or stepped with the light guide plate 1. By improving optical performance, assembly accuracy, structural stability, optical effect, and application flexibility of the optical film, the overall quality and performance of the backlight module are significantly improved, enabling the backlight module to provide better display effect, more reliable performance, and higher assembly accuracy in practical applications.

[0068] Furthermore, it also includes a third optical module 6 and a frame 7; the third optical module 6 and the frame 7 are sequentially disposed on the side of the light guide plate away from the second optical module.

[0069] In this embodiment, the frame 7 adopts an aluminum frame design. Aluminum is relatively lightweight, which helps to reduce the weight of the overall structure, making it easy to install and transport. In addition, aluminum has high strength and rigidity, which can effectively support the optical module and other components and ensure structural stability. At the same time, aluminum has good thermal conductivity, which helps to dissipate heat and prevent the optical module from overheating during operation. Furthermore, aluminum is easy to process and form, which can achieve precise design requirements.

[0070] In addition, the aluminum frame not only supports the optical module, but may also provide additional structural support and protection, making the entire system more robust and durable. The design of the aluminum frame takes into account the assembly and adjustment needs of the components, making it easy to operate during production and maintenance.

[0071] Furthermore, the first optical module 2, the second optical module 3, the light guide plate 1, and the third optical module 6 form a second integrated structure, which is located inside the frame 7.

[0072] In the above technical solution, the various modules are combined and connected and placed inside the frame 7, which can effectively protect the optical components from external physical impacts and environmental factors, such as dust and moisture, and extend the service life of the equipment.

[0073] Furthermore, the third optical module 6 is connected to the side of the light guide plate 1 away from the second optical module 3 and the frame 7 by adhesive 5.

[0074] In this embodiment, the third optical module 6 is a reflective film.

[0075] In the above technical solution, the third optical module 6 is connected to the light guide plate 1 and the frame 7 by fixing adhesive 5. This can ensure that the position of the third optical module 6 is stable and not easy to move or tilt, which helps to maintain the accuracy and consistency of the optical system. At the same time, fixing the two ends of the third optical module 6 further ensures the stability and balance of the light guide plate 1 and the components fixed on the light guide plate 1.

[0076] Furthermore, the first thermal expansion coefficient of the first optical module 2 is the same as the second thermal expansion coefficient of the light guide plate 1, or the first thermal expansion coefficient is greater than the first preset threshold of the second thermal expansion coefficient, or the first thermal expansion coefficient is less than the second preset threshold of the second thermal expansion coefficient.

[0077] In the above technical solution, the first optical module 2 and the light guide plate 1 have the same or similar coefficients of thermal expansion, and their dimensions in two directions are almost the same. When the temperature changes, it can be assumed that their elongation or shortening is consistent. Therefore, the transmission of thermal stress between the two components will be reduced, thereby reducing the structural stress caused by the difference in thermal expansion, and thus maintaining the structural integrity and functional stability of the optical system.

[0078] In this embodiment, those skilled in the art can set the first and second coefficients of thermal expansion according to actual application requirements so that they are close to each other, for example, within a 10% deviation. However, the specific difference value requirements vary depending on different application requirements, and no restrictions are imposed here.

[0079] Furthermore, it also includes a light source 8, which is located on the side of the protrusion 4 away from the second optical module 3.

[0080] In this embodiment, the light source 8 is an LED lamp. LED lamps have advantages such as high brightness, long lifespan, low power consumption, and high efficiency, making them suitable for use as light sources in optical systems. The LED lamp is positioned on a protrusion 4 of the optical system, which is designed to be away from the second optical module 3. This configuration effectively concentrates light onto the optical module and, through optical processing, ensures that the light is uniformly transmitted onto the light guide plate 1. The first optical module 2 receives the light from the LED lamp and performs preliminary processing, such as focusing the light onto the light guide plate 1 using a lens or mirror. The second optical module 3 further adjusts and optimizes the light, ensuring that the light is uniformly distributed on the light guide plate 1, thereby improving the uniformity and quality of the display effect.

[0081] In the above technical solution, the light source 8 is located on the side of the protrusion 4 away from the second optical module 3, which can effectively utilize the space inside the equipment and make it easier for maintenance personnel to access and replace the light source 8. The position of the light source 8 will not interfere with the disassembly and maintenance of the optical module, thus improving the convenience of maintenance.

[0082] It should be noted that all the bonding achieved by the fixing adhesive 5 in Example 1 can be either set as a whole or set in segments. The optical film is relatively light and will not affect the bonding effect between them.

[0083] like Figure 2 As shown, a high-temperature simulation test was conducted on the backlight module described in Embodiment 1. It can be seen that the film arching is very slight and can be ignored.

[0084] Example 2:

[0085] Please see Figure 3 This application also provides a method for assembling a backlight module, including the following steps:

[0086] S1: Provide a light guide plate 1, a first optical module 2, and a second optical module 3, wherein a protrusion 4 is provided on one side of the light guide plate 1, and the second optical module 3 includes a multilayer optical film.

[0087] S2: The multilayer optical films are sequentially stacked and bonded to the light guide plate 1 using the fixing adhesive 5; wherein the bonding side is close to the protrusion 4.

[0088] S3: The first optical module 2 is connected to one side of the light guide plate 1 relative to the protrusion 4 by means of the fixing adhesive 5, and the first optical module 2 is connected to the second side of the first integral structure by means of the fixing adhesive 5, while the other side of the first optical module 2 is movably connected to the protrusion 4.

[0089] In the above technical solution, the use of fixing adhesive 5 can ensure that the multi-layer optical film forms a stable overall structure, which helps to improve the structural integrity and stability of the optical module, and no additional hardware is required to complete the fixing, which can also reduce costs to a certain extent; at the same time, the above assembly design does not require a middle frame, silicone block and light-shielding tape. The first optical module 2 presses the second optical module 3 onto the light guide plate 1, and additional auxiliary materials can be saved to achieve self-fixation.

[0090] Furthermore, since the adhesive 5 that fixes the first optical module 2 will not move significantly, the first optical module 2 will not bulge. Also, since each layer of optical film is only fixed on one side, while the other side is free, it will not bulge either. This ensures that the overall backlight module will not have friction issues with other parts.

[0091] Furthermore, before performing step S1, the following steps are also included:

[0092] Provides a third optical module 6 and a frame 7.

[0093] The third optical module 6 is connected to the light guide plate 1 on the side away from the second optical module 3 and the frame 7 by means of adhesive 5; wherein the first optical module 2, the second optical module 3, the light guide plate 1 and the third optical module 6 form a second integral structure, and the second integral structure is located inside the frame 7.

[0094] The frame 7 is made of aluminum.

[0095] In addition, the light guide plate 1 can be fixed to the third optical module 6 first and then to the frame 7, or the third optical module 6 can be partially hollowed out and the light guide plate 1 can be directly fixed to the frame 7.

[0096] In the above technical solution, the third optical module 6 is connected to the light guide plate 1 and the frame 7 by fixing adhesive 5, which simplifies the assembly process. This design reduces the need for complex mechanical connections and improves assembly efficiency.

[0097] In existing backlight module solutions, silicone blocks are typically used to adhere to the top side of the aluminum frame. These silicone blocks are small and narrow, and need to be attached to the side (e.g., Figure 4 (As shown). There are two difficulties. First, the silicone block is difficult to grasp, and it is attached to the side, making it difficult to meet the space requirements of the device's execution end. Second, the silicone block and the light guide plate 1 are interference-fitted, so the silicone block must deform to function, which means the maximum shape of the light guide plate 1 squeezed into the silicone block. From an automation perspective, the top-to-bottom assembly scheme is not feasible because the silicone block blocks the movement trajectory of the light guide plate 1. Forcibly pressing it in from the side can cause the light guide plate 1 to slip on the suction cup, or even deform.

[0098] Existing backlight module solutions with a mid-frame (such as...) Figure 5 As shown, the middle frame is generally a thin part, and its shape is strip-shaped or frame-shaped. It is usually fixed to the aluminum frame using clips, but the clips need to deform to function. Both of these points are not conducive to the use of automation solutions.

[0099] Another solution without a mid-frame (such as) Figure 6 As shown, the diaphragm extends out and is inserted into the aluminum frame. Similar to the silicone block, it cannot be attached from top to bottom. If the diaphragm is inserted obliquely from the side, a six-axis robot arm is theoretically required, and the material requirements are extremely high. Furthermore, it would pose a significant risk of scratching the diaphragm. This solution is only theoretically possible and has no practical significance.

[0100] Furthermore, due to the forming principle of stamping parts, the hole for inserting the diaphragm in the frameless stamping solution must be a perforation, which inevitably requires the addition of light-blocking tape to seal the hole, otherwise the light effect will be lost; however, the light-blocking tape can only be a small and thin sheet, which is difficult to absorb. More importantly, the perforation is located at the corner where the side and bottom surfaces intersect, which is almost impossible to complete with an automated solution.

[0101] Regardless of whether the solution has a mid-frame or not, the membranes cannot be sealed together, and defects such as foreign matter in the interlayer frequently occur. Furthermore, due to the large number of manual manufacturing steps, efficiency and quality cannot be controlled at a high level, and these factors are all factored into the cost.

[0102] The assembly method described in Example 2 can achieve automated assembly, and there is no interference problem from a top-down perspective. It consists of a layered structure and uses adhesive or dispensing processes. The automation industry is mature, and there is no need for small and thin sheet bonding. All optical films and fixing methods can be automated.

[0103] Furthermore, it should be noted that this application can minimize the error accumulation path and facilitate real-time product alignment, avoiding unnecessary errors introduced during the bonding process. For manufacturers assembling backlight modules, it enhances the overall product's aesthetics and facilitates the achievement of extremely narrow bezels and further optimization of screen-to-body ratio. Simultaneously, for vehicle manufacturers, it significantly improves the aesthetics of the vehicle's interior, and the optimized screen-to-body ratio provides consumers with a greater visual impact, enhancing the vehicle's technological feel and boosting sales. Moreover, structurally, there are no impossible modules in the hardware, making it highly applicable.

[0104] Example 3:

[0105] This application also provides a display, the display including a display panel and the backlight module, the display panel being disposed on the backlight module.

[0106] In summary, this application provides a backlight module, an assembly method, and a display. The backlight module includes at least a light guide plate 1, a first optical module 2, and a second optical module 3. A protrusion 4 is provided on one side of the light guide plate 1. One side of the first optical module 2 is movably connected to the protrusion 4, and the other side is connected to the other side of the light guide plate 1 opposite to the protrusion 4 by a fixing adhesive 5. The second optical module 3 includes multiple optical films, and the same side of each optical film is bonded together by the fixing adhesive 5 to form a first integral structure, and the bonding side is close to the protrusion 4. The first side and the second side of the first integral structure are respectively fixed to the light guide plate 1 and the first optical module 2 by the fixing adhesive 5, and the fixing side and the bonding side are located on the same side. The design of this application ensures that neither the first optical module 2 nor the second optical module 3 will bulge, thus preventing the overall backlight module from rubbing against other parts. Furthermore, this application only requires adhesive 5 to complete the fixed assembly, without the need for additional hardware materials. The assembly is simple, low-cost, and has good sealing performance. It can also be applied to any backlight shell, making it highly adaptable.

[0107] Although exemplary embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above exemplary embodiments are merely illustrative and are not intended to limit the scope of this application. Various changes and modifications can be made therein by those skilled in the art without departing from the scope and spirit of this application. All such changes and modifications are intended to be included within the scope of this application as claimed in the appended claims.

[0108] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0109] Although the description of this application has been made in conjunction with the specific embodiments described above, it will be apparent to those skilled in the art that many substitutions, modifications, and variations can be made based on the foregoing. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A backlight module, comprising at least a light guide plate, a first optical module, and a second optical module, characterized in that, A protrusion is provided on one side of the light guide plate; One side of the first optical module is movably connected to the protrusion, and the other side is connected to the light guide plate on the other side of the protrusion via adhesive; wherein, the first thermal expansion coefficient of the first optical module is the same as the second thermal expansion coefficient of the light guide plate. The second optical module includes multiple optical films. The same side of each optical film is bonded to each other to form a first integral structure, and the bonded side is close to the protrusion. The other side of each optical film relative to the bonded side is not fixed and is in a completely free state. The first side and the second side of the first integral structure are respectively fixed to the light guide plate and the first optical module by the fixing adhesive, and the fixing side and the bonding side are located on the same side; It also includes a third optical module, a frame, and a light source; the third optical module and the frame are sequentially disposed on the side of the light guide plate away from the second optical module; the light source is disposed on the side of the protrusion away from the second optical module.

2. The backlight module according to claim 1, characterized in that, Each layer of optical film is aligned and bonded to the light guide plate at a preset position, or bonded in a stepped manner.

3. The backlight module according to claim 1, characterized in that, The first optical module, the second optical module, the light guide plate, and the third optical module form a second integrated structure, which is located inside the frame.

4. The backlight module according to claim 3, characterized in that, The third optical module is connected to the light guide plate on the side away from the second optical module and the frame by adhesive.

5. A method for assembling a backlight module as described in any one of claims 1-4, characterized in that, Includes the following steps: S1: Provides a light guide plate, a first optical module, and a second optical module, wherein the light guide plate has a protrusion on one side, and the second optical module includes a multilayer film; S2: Multiple optical films are sequentially stacked and bonded together using a fixing adhesive to form a first integral structure; wherein, the bonding side is close to the protrusion, and each optical film layer is not fixed relative to the other side of the bonding side and is in a completely free state; the light guide plate is bonded to the first side of the first integral structure. S3: Connect one side of the first optical module to the other side of the light guide plate opposite to the protrusion using adhesive, and connect the first optical module to the second side of the first integral structure using adhesive, while movably connecting the other side of the first optical module to the protrusion.

6. The assembly method according to claim 5, characterized in that, Before performing step S1, the method further includes: providing a third optical module and a frame; and connecting the two sides of the third optical module to the side of the light guide plate away from the second optical module and the frame using adhesive; wherein the first optical module, the second optical module, the light guide plate and the third optical module form a second integral structure, and the second integral structure is located inside the frame.

7. A display, characterized in that, The display includes a display panel and a backlight module as described in any one of claims 1-4, wherein the display panel is disposed on the backlight module.

Images