Backlight module, assembling method and display

Abstract

The invention provides a backlight module, an assembling method and a display. The backlight module at least comprises a light guide plate, a first optical module and a second optical module, a protruding part is arranged on one side of the light guide plate, the second optical module comprises multiple layers of optical films, one side of the first optical module is movably connected with the protruding part, and the other side of the first optical module is connected to the other side, opposite to the protruding part, of the light guide plate through fixing glue. The same sides of all the layers of optical films are mutually bonded through fixing glue to form a first integral structure, and the bonding sides are close to the protruding parts; the first side and the second side of the first integral structure are fixed to the light guide plate and the first optical module respectively through fixing glue, and the fixing side and the bonding side are located on the same side. According to the backlight module, the first optical module and the second optical module are not arched, so that the problem of friction between the backlight module and other parts is solved; moreover, fixing and assembling can be completed only through fixing glue, extra hardware materials are not needed, assembling is easy, cost is low, sealing performance is good, and meanwhile adaptability is wide.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a backlight module, an assembly method and a display. Background Art

[0002] An existing backlight module solution is to position the optical film through a hole-shaft matching method and add parts to press the film. This method cannot fundamentally solve the problem of film arching, and at the same time increases materials, makes assembly complex and has poor sealing.

[0003] Another backlight module solution is to design a stud-like structure on the backlight bottom shell, with the optical diaphragm extending out to cooperate with the structure, and then adding parts to fix it, playing a role similar to a nut; this can only be used on a die-cast backlight shell, and its scope of application is limited. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a backlight module, an assembly method and a display which are easy to assemble and do not cause the optical film to bulge.

[0005] Specifically, the present application provides a backlight module, which at least includes a light guide plate, a first optical module and a second optical module, wherein a protrusion is disposed 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 other side of the light guide plate opposite to the protrusion through fixing glue.

[0007] The second optical module includes multiple layers of optical films, and the same side of each layer of optical films is bonded to each other by the fixing glue to form a first integral structure, 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 glue, and the fixing side and the bonding side are located on the same side.

[0009] In the above technical solution, the upper and lower surfaces of the fixing glue that fixes the first optical module to the other side of the protrusion will not have obvious relative movement, the first optical module will not arch, and at the same time, since the optical film layers of the second optical module are only fixed on one side and the other side is in a free state, they will naturally not arch either. In this way, the overall backlight module will not have friction problems with other parts; and the present application only needs to use fixing glue to complete the fixed assembly, and does not require additional hardware materials. The assembly is simple, the cost is low, and the sealing is good. At the same time, it can be applied to any backlight shell and has a wide adaptability.

[0010] Furthermore, each layer of optical film 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, each layer of optical film is aligned or stepped with the light guide plate, which significantly improves the overall quality and performance of the backlight module by improving the optical performance, assembly accuracy, structural stability, optical effect and application flexibility of the optical film, so that the backlight module can provide better display effects, more reliable performance and higher assembly accuracy in actual applications.

[0012] Furthermore, it also includes a third optical module and a frame; the third optical module and the frame are sequentially arranged on a 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 integral structure, and the second integral structure is arranged inside the frame.

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

[0015] Furthermore, two sides of the third optical module are connected between the side of the light guide plate away from the second optical module and the frame through fixing glue.

[0016] In the above technical solution, the two sides of the third optical module are connected between the light guide plate and the frame by fixing glue, which can ensure that the position of the third optical module is stable and not easy to move or tilt, which 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 a first preset threshold of the second thermal expansion coefficient, or the first thermal expansion coefficient is less than a second preset threshold of the second thermal expansion coefficient.

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

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

[0020] In the above technical solution, the light source is arranged on the side of the protrusion away from the second optical module, which can effectively utilize the space inside 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, thereby improving the convenience of maintenance.

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

[0022] S1: Provide a light guide plate, a first optical module and a second optical module, wherein a protrusion is disposed on one side of the light guide plate, and the second optical module includes a multi-layer optical film.

[0023] S2: stacking and bonding the multi-layer optical film sheets to the light guide plate in sequence by means of a fixing glue, wherein the bonding side is close to the protrusion.

[0024] And S3: connect one side of the first optical module to the other side of the light guide plate relative to the protrusion through fixing glue, connect the first optical module to the second side of the first overall structure through the fixing glue, and movably connect the other side of the first optical module to the protrusion.

[0025] In the above technical solution, the use of fixing glue 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 does not require additional hardware to complete the fixation, which can also reduce costs to a certain extent; at the same time, the above assembly design does not require a middle frame, silicone blocks and shading tape. The first optical module presses the second optical module onto the light guide plate, and additional auxiliary materials can be saved to achieve self-fixation.

[0026] In addition, since the fixing glue fixing the first optical module will not move significantly, the first optical module will not arch. At the same time, since each layer of optical film is only fixed on one side and the other side is free, it will naturally not arch. This ensures that the overall backlight module will not have friction problems with other parts.

[0027] Furthermore, before executing step S1, the method further includes:

[0028] A third optical module and a frame are provided.

[0029] And the two sides of the third optical module are connected between the side of the light guide plate away from the second optical module and the frame by fixing glue; 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 glue, which simplifies the assembly process. This design reduces the need for complex mechanical connections and improves assembly efficiency.

[0031] Based on the same concept, the present application also provides a display, which includes a display panel and the backlight module, and the display panel is arranged on the backlight module.

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

[0033] The present application provides a backlight module, which at least includes a light guide plate, a first optical module and a second optical module, wherein a protrusion is arranged 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 relative to the protrusion by a fixing glue; the second optical module includes a plurality of layers of optical films, and the same side of each layer of optical films is bonded to each other by the fixing glue to form a first integral structure, and the bonding side is 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 by the fixing glue, and the fixing side and the bonding side are located on the same side.

[0034] The design of the present application ensures that neither the first optical module nor the second optical module will be arched, so that the overall backlight module will not have friction problems with other parts; and the present application only needs to use fixing glue to complete the fixed assembly, and does not require additional hardware materials. The assembly is simple, the cost is low, and the sealing is good. At the same time, it can be applied to any backlight shell and has a wide adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0036] Figure 2 Schematic diagram of high temperature simulation test results described in Example 1.

[0037] Figure 3 This is a flow chart of the assembly method of the backlight module described in the second embodiment.

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

[0039] Figure 5 This is a schematic diagram of the solution with a middle frame described in Example 2.

[0040] Figure 6 This is a schematic diagram of the solution without a middle frame described in Example 2.

[0041] Description of reference numerals:

[0042] 1-light guide plate, 2-first optical module, 3-second optical module, 4-protrusion, 5-fixing glue, 6-third optical module, 7-frame, 8-light source. DETAILED DESCRIPTION

[0043] A backlight module, an assembly method and a display of the present application are further described in detail below in conjunction with specific embodiments and drawings.

[0044] Embodiment 1:

[0045] See also Figure 1 The present application provides a backlight module, which at least includes 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 on the light guide plate 1, which can serve as a fixing point for other optical modules, light source 8 and other components, ensuring the structural stability of the entire backlight module, thereby reducing component displacement caused by vibration or impact, thereby 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 other side of the light guide plate 1 opposite to the protrusion 4 through a fixing glue 5 .

[0048] In this embodiment, the fixing glue 5 can be glue or tape; the glue can be, for example, 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, which is easy to use and quick to install, and is suitable for applications requiring transparent bonding, while high-temperature tape can withstand higher temperature changes and is suitable for applications requiring high-temperature resistant backlight modules.

[0049] Here, there is no limitation on the specific type of glue or tape, and those skilled in the art can select one according to actual application requirements.

[0050] When selecting glue or tape, technical personnel in this field need to fully ensure the transparency of the glue or tape to avoid interference with light propagation, and need to choose high-temperature resistant glue or tape as much as possible to cope with possible temperature changes. At the same time, it is necessary to select products with sufficient bonding strength according to actual needs to ensure the stability of the light guide plate 1; in addition, it is also necessary to select a suitable curing time type according to production requirements to improve production efficiency.

[0051] Furthermore, the height of the fixing glue 5 bonding the first optical module 2 and the light guide plate 1 can be adjusted in coordination with the injection molding of the light guide plate 1 .

[0052] In addition, since the fixing glue 5 has no obvious relative movement with respect to the first optical module 2 and the upper and lower surfaces of the light guide plate 1 , the first optical module 2 will not be arched at this time.

[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 source so that the display can still maintain a clear visual effect at a higher brightness, and can also improve the contrast of the display, making the black deeper and the white brighter, thereby improving the visual effect of the image.

[0054] Furthermore, the fixing glue 5 for bonding the first optical module 2 and the light guide plate 1 can be provided in whole sections or in sections.

[0055] Among them, the whole-section setting can ensure the uniform thickness of the glue layer, provide a stable bonding effect, and the coating process is relatively simple, with fewer operating steps, so as to reduce bubbles and gaps caused by local uneven 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 layers of optical films, and the same side of each layer of optical films is bonded to each other by the fixing glue 5 to form a first integral structure, and the bonding side is close to the protrusion 4 .

[0057] In this embodiment, the optical films close to the first optical module may be a first brightness enhancement film, a second brightness enhancement film (Brightness Enhancement Film, ie BEF) and a diffusion film (ie diffuser).

[0058] Among them, the role of the brightness enhancement film is to increase the light output of the display by changing the propagation direction and scattering of light, thereby improving the brightness and clarity of the display effect to improve the overall brightness and visibility of the display.

[0059] The working principle of the diffuser is to change the propagation direction of light in a variety of 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, and technicians in this field can choose according to actual application requirements.

[0060] Furthermore, the fixing glue 5 for bonding the layers of optical films is the same as described above and will not be described in detail here; the bonding side is arranged near the protrusion 4 in order to better fix the other end of the first optical module 2 .

[0061] Since each layer of optical film is only fixed at one end and the other end is completely free, the film can avoid arching or deformation due to internal stress or uneven adhesion. 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] In addition, such a design can also simplify the assembly process, reduce production costs, and reduce the complexity of maintenance work. Due to the asymmetric bonding at both ends of the diaphragm, the diaphragm can maintain a stable shape after being subjected to force and is not deformed by external influences. Therefore, the performance under dynamic or static conditions is better; this bonding and fixing method effectively solves the stability problem of the optical diaphragm, improves the overall processability 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 glue 5 , and the fixing side and the bonding side are located on the same side.

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

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

[0066] Furthermore, each layer of optical film 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 or stepped with the light guide plate 1, which significantly improves the overall quality and performance of the backlight module by improving the optical performance, assembly accuracy, structural stability, optical effect and application flexibility of the optical film, so that the backlight module can provide better display effects, more reliable performance and higher assembly accuracy in actual 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 arranged on a 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 light, which helps to reduce the weight of the overall structure and facilitates installation and transportation. Aluminum has high strength and rigidity, and can effectively support the optical module and other components to 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, and can achieve precise design requirements.

[0070] In addition, the aluminum frame not only supports the optical module, but also provides additional structural support and protection, making the entire system more solid and durable. The design of the aluminum frame takes into account the assembly and adjustment requirements 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 integral structure, and the second integral structure is disposed inside the frame 7 .

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

[0073] Furthermore, two sides of the third optical module 6 are connected between the side of the light guide plate 1 away from the second optical module 3 and the frame 7 through fixing glue 5 .

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

[0075] In the above technical solution, the two sides of the third optical module 6 are connected between the light guide plate 1 and the frame 7 by fixing glue 5, which 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 a first preset threshold of the second thermal expansion coefficient, or the first thermal expansion coefficient is less than a second preset threshold of the second thermal expansion coefficient.

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

[0078] In this embodiment, those skilled in the art may set the first coefficient of thermal expansion and the second coefficient of thermal expansion according to actual application requirements so that the two are relatively close, for example, within a deviation of 10%. However, different application requirements may have different requirements for specific difference values, which are not limited here.

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

[0080] In this embodiment, the light source 8 is an LED lamp, which has the advantages of high brightness, long life, low power consumption and high efficiency, and is suitable for the light source 8 in the optical system; the light source 8 LED lamp is arranged on a protrusion 4 of the optical system, which is designed to be away from the side of the second optical module 3. This configuration can effectively concentrate the light to the optical module, and through optical processing, the light is evenly transmitted to 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 through a lens or a reflector, and the second optical module 3 further adjusts and optimizes the light so that the light is evenly 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 arranged 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, thereby improving the convenience of maintenance.

[0082] It should be noted that all the bonding achieved by the fixing glue 5 in the first embodiment can be either whole-segment or segmented. The optical film is relatively light and will not affect the bonding effect.

[0083] like Figure 2 As shown, a high temperature simulation test was performed on the backlight module described in the first embodiment. It can be seen that the film arch is very slight and can be ignored.

[0084] Embodiment 2:

[0085] See also Figure 3 The present application also provides a method for assembling a backlight module, comprising 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 multi-layer optical film.

[0087] S2: stacking and bonding the multi-layer optical film sheets to the light guide plate 1 in sequence by means of a fixing glue 5 ; wherein the bonding side is close to the protrusion 4 .

[0088] And S3: connect one side of the first optical module 2 to the other side of the light guide plate 1 relative to the protrusion 4 through the fixing glue 5, and connect the first optical module 2 to the second side of the first overall structure through the fixing glue 5, and at the same time movably connect the other side of the first optical module 2 to the protrusion 4.

[0089] In the above technical solution, the use of fixing glue 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 does not require additional hardware to complete the fixation, 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 shading 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] In addition, since the fixing glue 5 that fixes the first optical module 2 will not move significantly, the first optical module 2 will not arch. At the same time, since each layer of optical film is only fixed on one side and the other side is in a free state, it will naturally not arch either. In this way, the overall backlight module will not have friction problems with other parts.

[0091] Furthermore, before executing step S1, the method further includes:

[0092] A third optical module 6 and a frame 7 are provided.

[0093] And the two sides of the third optical module 6 are connected between the side of the light guide plate 1 away from the second optical module 3 and the frame 7 by fixing glue 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 body 7 is made of aluminum.

[0095] In addition, the light guide plate 1 can be first fixed to the third optical module 6 and then fixed 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 glue 5, which simplifies the assembly process. This design reduces the need for complex mechanical connections and improves assembly efficiency.

[0097] In the existing backlight module solution, a silicone block is usually required to be bonded to the sky side of the aluminum frame. The silicone block is small and narrow, and needs to be attached to the side (such as Figure 4 There are two difficulties. First, the silicone block is difficult to grasp and is attached to the side. It is difficult to meet the space requirements of the equipment execution end. Second, the silicone block and the light guide plate 1 have an interference fit, so the silicone block must be deformed to work, that is, the light guide plate 1 is squeezed into the maximum shape of the silicone block. From the perspective of automation, the top-down assembly solution cannot be implemented because the silicone block blocks the movement trajectory of the light guide plate 1. If the light guide plate 1 is forced in from the side, it is easy for the light guide plate 1 to slip on the suction cup, or even deform.

[0098] The existing backlight module with middle frame solution (such as Figure 5 As shown in the figure, the middle frame is generally a thin part with a strip and frame shape. It is usually fixed to the aluminum frame by buckles, and the buckles need to deform to work. Both of the above points are not conducive to the use of automated solutions.

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

[0100] In addition, due to the forming principle of stamping parts, the hole for the diaphragm to be inserted in the stamping solution without a middle frame must be a perforation, and it is necessary to add blackout tape to seal the hole, otherwise the light effect will be lost; and the blackout 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 intersect, which is almost impossible to complete with an automated solution.

[0101] Regardless of whether there is a middle frame or no middle frame, the diaphragms cannot be sealed, and the so-called interlayer foreign matter defect often occurs. In addition, due to the large number of manual manufacturing links, the efficiency and quality cannot be controlled at a high level, and are all calculated into the cost.

[0102] The assembly method described in Example 2 can realize automated assembly, and there is no interference problem when looking from top to bottom. They are all stacked structures, and the process of gluing or dispensing is mature in the automation industry. There is no small and thin sheet material to be glued, and all optical films and fixing methods can be realized automatically.

[0103] Furthermore, it should be noted that the present application can shorten the error accumulation path to the maximum extent, and is conducive to the real-time positioning of the product, avoiding the introduction of unnecessary errors in the bonding process; for manufacturers of assembled backlight modules, it is conducive to improving the overall product taste, and is more conducive to the realization of extremely narrow black borders and further optimization of the screen-to-body ratio; at the same time, for vehicle manufacturers, the aesthetics of the vehicle interior is significantly improved, and the optimization of the screen-to-body ratio can bring greater visual impact to consumers, enhance the technological sense of the vehicle, and promote the sales of the vehicle; further, structurally speaking, there is no impossible module in the hardware aspect, and it is highly applicable.

[0104] Embodiment three:

[0105] The present application also provides a display, which includes a display panel and the backlight module, wherein the display panel is arranged on the backlight module.

[0106] In summary, the present application provides a backlight module, an assembly method and a display; the backlight module at least includes a light guide plate 1, a first optical module 2 and a second optical module 3, and 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 relative to the protrusion 4 through a fixing glue 5; the second optical module 3 includes a multilayer optical film, and the same side of each layer of the optical film is bonded to each other through the fixing glue 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 through the fixing glue 5, and the fixed side and the bonding side are located on the same side. The design of the present application ensures that the first optical module 2 and the second optical module 3 will not be arched, so that the overall backlight module will not have friction problems with other parts; and the present application only needs to use a fixing glue 5 to complete the fixed assembly, and does not require additional hardware materials. The assembly is simple, the cost is low, and the sealing is good. At the same time, it can be applied to any backlight shell and has a wide adaptability.

[0107] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely exemplary and are not intended to limit the scope of the present application to this. Those of ordinary skill in the art may make various changes and modifications therein without departing from the scope and spirit of the present application. All these changes and modifications are intended to be included within the scope of the present application as required by the appended claims.

[0108] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0109] Although the description of the present application is carried out in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included in 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 other side of the light guide plate opposite to the protrusion through a fixing glue; The second optical module comprises a plurality of optical films, and the same side of each layer of optical films is bonded to each other by the fixing glue to form a first integral structure, and the bonding side is 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 by the fixing glue, and the fixing side and the bonding side are located on the same side.

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: It also includes a third optical module and a frame; the third optical module and the frame are sequentially arranged on a side of the light guide plate away from the second optical module.

4. The backlight module according to claim 3, characterized in that: 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 arranged inside the frame.

5. The backlight module according to claim 4, characterized in that: Two sides of the third optical module are connected between the side of the light guide plate away from the second optical module and the frame through fixing glue.

6. The backlight module according to claim 1, characterized in that: 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 a first preset threshold of the second thermal expansion coefficient, or the first thermal expansion coefficient is less than a second preset threshold of the second thermal expansion coefficient.

7. The backlight module according to claim 1, characterized in that: It also includes a light source, which is arranged on a side of the protruding portion away from the second optical module.

8. A method for assembling a backlight module according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: providing 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, and the second optical module includes a multilayer film; S2: stacking and bonding the multi-layer optical film sheets to the light guide plate in sequence by means of a fixing glue; wherein the bonding side is close to the protruding portion, the multi-layer optical film sheets form a first integral structure, and the light guide plate is bonded to a first side of the first integral structure; and S3: Connect one side of the first optical module to the other side of the light guide plate relative to the protrusion through fixing glue, connect the first optical module to the second side of the first overall structure through the fixing glue, and movably connect the other side of the first optical module to the protrusion.

9. The assembly method according to claim 8, characterized in that: Before executing step S1, the method further includes: Providing a third optical module and a frame; and The two sides of the third optical module are connected between the side of the light guide plate away from the second optical module and the frame by fixing glue; 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.

10. A display, characterized in that: The display comprises a display panel and a backlight module as claimed in any one of claims 1 to 7, wherein the display panel is arranged on the backlight module.

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