Backlight module, display equipment and touch display equipment

Abstract

The utility model discloses a backlight module, a display device and a touch display device.The backlight module is used for the display device and comprises a back plate, a light-emitting part, a connecting support, a composite membrane and supporting foam, and the light-emitting part is installed on the back plate and used for emitting light; the composite membrane is arranged on the light-emitting side of the light-emitting part, is separated from the back plate and is used for receiving light rays emitted by the light-emitting part and atomizing and brightening the light rays emitted by the light-emitting part to form an area light source; the connecting support is arranged on the peripheral side of the composite membrane and connected with the back plate, the connecting support is connected with the edge portion of the composite membrane so as to tension the composite membrane outwards, the supporting foam is arranged between the back plate and the composite membrane, one end of the supporting foam abuts against the composite membrane, and the other end of the supporting foam abuts against the back plate. According to the technical scheme, the problem of uneven light distribution of the light-emitting part is solved through the composite membrane, the total weight of the display equipment is reduced, and the original assembly process is simplified.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and in particular to a backlight module, a display device, and a touch display device. Background Art

[0002] A display device usually includes a display module, a backlight module, and a control module. Among them, the backlight module is composed of a back panel, a lamp support frame, a reflector, a light-emitting component, a diffuser plate, and an optical film. The display module includes a display screen (liquid crystal display screen); the light emitted by the light-emitting component passes through the diffuser plate and the optical film in turn and is projected onto the display screen (liquid crystal display screen) of the display device. The diffuser plate atomizes the light, and the optical film can converge and focus the light atomized by the diffuser plate to achieve the purpose of brightening.

[0003] In related technologies, the backlight module of a display device includes a diffuser plate and an optical film. The manufacturing process of the diffuser plate and the optical film is complex and the material cost is high. The display device is heavy, and the assembly process and material costs are high. The backlight module uses a lamp support frame, which causes shadows on the display, resulting in poor and unstable display effects. Utility Model Content

[0004] The embodiments of the present application provide a backlight module, a display device, and a touch display device, which can solve the problem of inconvenient assembly of a diffusion plate and an optical film of a backlight module.

[0005] In the first aspect, an embodiment of the present application provides a backlight module, comprising a back panel, a light-emitting component, a connecting bracket, a composite diaphragm and a supporting foam, wherein the light-emitting component is mounted on the back panel and is used to emit light; the composite diaphragm is arranged on the light-emitting side of the light-emitting component and is spaced apart from the back panel, the composite diaphragm is used to receive the light emitted by the light-emitting component, and atomize and brighten the light emitted by the light-emitting component to form a surface light source; the connecting bracket is arranged on the outer peripheral side of the composite diaphragm and is connected to the back panel, the connecting bracket is configured to connect the edge portion of the composite diaphragm to tension the composite diaphragm outward and straighten it, the supporting foam is arranged between the back panel and the composite diaphragm, one end of the supporting foam abuts against the composite diaphragm, and the other end of the supporting foam abuts against the back panel.

[0006] Based on the backlight module provided in the embodiment of the present application, a thin composite film is used to achieve light atomization and brightening, and the composite film is installed only by connecting the bracket, thereby achieving lightweight backlight module and simplifying the installation process.

[0007] In some embodiments, the connecting bracket includes: a mounting seat connected to the back plate; a connecting seat including a first mounting portion and a second mounting portion, the second mounting portion and the mounting seat are located on the same side of the first mounting portion and are respectively connected to the first mounting portion, and the composite diaphragm is installed on the second mounting portion.

[0008] Based on the backlight module provided in the embodiment of the present application, the connecting bracket can simultaneously cooperate with the installation of the cover plate and the composite membrane. The structure of the connecting bracket is simple, and there is no need to add additional related structures to separately install the cover plate and the composite membrane. It can also simplify the installation process.

[0009] In some embodiments, the composite diaphragm has a connecting hole, the second mounting portion passes through the connecting hole, and the second mounting portion is in contact with at least a portion of the wall surface of the connecting hole to tighten and straighten the composite diaphragm.

[0010] The backlight module provided by the embodiment of the present application effectively reduces the possibility of the composite diaphragm becoming loose or falling off during installation, transportation, and use, thereby extending the service life of the composite diaphragm.

[0011] In some embodiments, the second mounting portion extends in a direction perpendicular to the plate surface of the composite membrane; and / or the first mounting portion extends in a direction parallel to the plate surface of the composite membrane.

[0012] Based on the backlight module provided in the embodiment of the present application, the structural stability of the connecting bracket is enhanced, and the installation between the composite diaphragm and the cover plate can be facilitated.

[0013] In some embodiments, the backlight module further includes a first adhesive layer, which is disposed between the composite film and the first mounting portion and is adhered to the composite film and the first mounting portion, respectively.

[0014] The backlight module provided in the embodiment of the present application effectively reduces the possibility of the composite film falling off, thereby ensuring its reliability during long-term use.

[0015] In some embodiments, the mounting seat includes a first plate and a second plate, the second plate is connected between the first mounting portion and the first plate, the first plate extends in a direction parallel to the surface of the composite diaphragm, and the surface of the first plate is in contact with the surface of the back plate.

[0016] Based on the backlight module provided in the embodiment of the present application, the spacing setting between the first plate and the first mounting portion can effectively reduce the interference between the first plate and the composite diaphragm and other structures, ensuring the convenience of installing other structures corresponding to the first mounting portion.

[0017] In some embodiments, the composite diaphragm is a rectangular diaphragm having long sides and wide sides, and the number of connecting brackets is multiple; some of the connecting brackets are arranged at intervals along the long sides of the composite diaphragm and connected to the edge portions of the composite diaphragm; and / or some of the connecting brackets are arranged at intervals along the wide sides of the composite diaphragm and connected to the edge portions of the composite diaphragm.

[0018] Based on the backlight module provided in the embodiment of the present application, multiple connecting brackets can provide multiple fixing points for the composite diaphragm to ensure a tighter connection between the composite diaphragm and the back panel, thereby achieving uniform fixation of the composite diaphragm in the entire backlight display module, reducing local stress concentration, and increasing the actual service life of the composite diaphragm.

[0019] In some embodiments, the composite film includes a first optical film, a light-enhancing layer and a diffusion film stacked in sequence; wherein the first optical film includes a first substrate, a first optical layer and a microstructure layer, the microstructure layer is connected to the first surface of the first substrate, and the first optical layer is connected to the second surface of the first substrate; the diffusion film includes a second substrate and a second optical layer, and the second optical layer is connected to the surface of the second substrate facing away from the first optical film; the light-enhancing layer includes a first light-enhancing film and a second light-enhancing film stacked together, the first light-enhancing film has a first prism, the second light-enhancing film has a second prism, and the angular difference between the first prism and the second prism is 90°.

[0020] Based on the backlight module provided in the embodiment of the present application, the composite film can not only atomize the light but also brighten it. It can replace the diffusion plate and optical film in the related technology and be applied to the backlight module, thereby simplifying the structure of the backlight module, simplifying the assembly process, saving material usage, and reducing the space occupied by the backlight module.

[0021] In a second aspect, an embodiment of the present application provides a display device, including a display module and the above-mentioned backlight module; the display module includes a liquid crystal display screen, which is stacked on a side of the composite film away from the light-emitting element.

[0022] The display device provided in the embodiment of the present application can ensure the atomization effect while reducing the asynchronous movement between the composite diaphragm and the liquid crystal display screen, thereby reducing the probability of wear defects.

[0023] On the third aspect, an embodiment of the present application also provides a display device, including a display module and the above-mentioned backlight module, the display module including a liquid crystal display screen, the liquid crystal display screen is stacked on the side of the composite film away from the light-emitting element, the display device also includes a cover plate and a frame, the connecting bracket is connected to the frame, and the frame is connected to the back plate so that the connecting bracket can be installed on the back plate through the frame; wherein, the frame includes a main body and an extension part, the main body part is arranged on the outer periphery of the cover plate, the extension part extends along the edge part of the top surface of the cover plate, the connecting bracket is connected to the main body part, the edge part of the cover plate is arranged between the extension part and the connecting bracket, and the extension part and the connecting bracket jointly fix the cover plate.

[0024] The display device provided in the embodiment of the present application can provide a stable connection effect, improve the installation stability between the mounting base and the frame, reduce the displacement of the mounting base during use, and further optimize the display effect.

[0025] In some embodiments, the mounting base is connected to the frame; an edge portion of the cover plate is disposed between the extension portion and the first mounting portion, and the extension portion and the first mounting portion jointly fix the cover plate.

[0026] Based on the display device provided in the embodiment of the present application, the connecting bracket can simultaneously cooperate with the installation of the cover plate and the composite diaphragm. The structure of the connecting bracket is simple, and there is no need to add additional related structures to separately install the cover plate and the composite diaphragm, which can also simplify the installation process.

[0027] In a fourth aspect, an embodiment of the present application provides a touch display device, including a touch component; the touch component includes the above-mentioned backlight module; or, the touch component includes the above-mentioned display device.

[0028] The touch display device provided in the embodiment of the present application can realize the human-computer interaction function more intuitively. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 This is a schematic cross-sectional view of a backlight module in one embodiment of the present application;

[0031] Figure 2 for Figure 1 A magnified schematic diagram of point A in the middle;

[0032] Figure 3 This is a schematic diagram of the three-dimensional structure of a connecting bracket in one embodiment of the present application;

[0033] Figure 4 This is a schematic diagram of the three-dimensional structure of the connection bracket and the composite diaphragm in one embodiment of the present application;

[0034] Figure 5 This is a schematic cross-sectional view of a composite membrane in one embodiment of the present application;

[0035] Figure 6 is a schematic cross-sectional structural diagram of a composite membrane in another embodiment of the present application;

[0036] Figure 7 Schematic diagram of the cross-sectional structure of a composite membrane in another embodiment of the present application;

[0037] Figure 8This is a schematic cross-sectional structural diagram of a display device in one embodiment of the present application;

[0038] Figure 9 for Figure 8 A magnified schematic diagram of point B in the middle;

[0039] Figure 10 Schematic diagram of the cross-sectional structure of a touch display device in one embodiment of the present application.

[0040] Figure Number:

[0041] 1000. Display device;

[0042] 1. Backlight module;

[0043] 11. back plate; 111. back plate body; 112. transition portion; 113. support portion;

[0044] 12. Luminous parts;

[0045] 13. Connecting bracket; 131. Mounting seat; 1311. First plate; 1311a. Mounting hole; 1312. Second plate; 132. Connecting seat; 1321. First mounting portion; 1322. Second mounting portion; 1323. First adhesive layer;

[0046] 14. Composite diaphragm; 141. Connection hole;

[0047] 100, first optical film; 110, first substrate; 120, first optical layer; 130, microstructure layer; 121, first optical adhesive; 122, diffusion particles; 200, diffusion film; 210, second substrate; 220, second optical layer; 221, second optical adhesive; 222, second refractive material; 300, brightness enhancement layer; 310, first brightness enhancement film; 320, second brightness enhancement film; 400, adhesive material;

[0048] 15. Support foam;

[0049] 16. Reflecting sheet; 161. Reflecting portion; 162. Bending portion;

[0050] 2. Display module; 21. LCD screen;

[0051] 3. Cover plate;

[0052] 4. Frame; 41. Main body; 411. Matching groove; 42. Extension; 43. Accommodating cavity; 44. Light hole;

[0053] 5. Locking parts;

[0054] 6. Capacitive touch film;

[0055] 7. Infrared touch module;

[0056] 8. Optical filter;

[0057] X, long side; Y, wide side. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0059] Display devices typically include a display module, a backlight module, and a control module. The backlight module is composed of a backplane, a lamp support frame, a reflector, a light-emitting element, a diffuser, and an optical film. The display module includes a display screen (liquid crystal display). Light emitted by the light-emitting element passes through the diffuser and optical film in sequence and is projected onto the display screen (liquid crystal display) of the display device. The diffuser atomizes the light, and the optical film can converge and focus the light atomized by the diffuser to achieve the purpose of brightening. The optical film is a multilayer film, and the multilayer film of the optical film can be combined in the following ways: upper diffuser film + 0° brightening film, upper diffuser film + 0° brightening film + 90° brightening film, upper diffuser film + 90° brightening film + 0° brightening film, etc.

[0060] In the related art, the backlight module includes a diffuser plate and an optical film. The preparation process of the diffuser plate and the optical film is complicated and the material cost is high. During assembly, the light-emitting components, lamp support frame, diffuser plate, optical film and LCD screen of the backlight module need to be aligned and the relative positions of each structure need to be fixed before the assembly can be completed. The assembly process is complicated and the cost is high.

[0061] Furthermore, traditional diffuser panels are typically approximately 2.0mm thick and weigh over 4kg. This not only increases the weight of the entire display but also requires support from a lamp support frame, which can easily cause light shadows that affect the display. When the diffuser panel collides with the curved edge of the back panel, it can also crack, leading to unstable display and a poor user experience.

[0062] Based on this, the embodiments of the present application provide a backlight module, a display device, and a touch display device to solve technical problems in existing designs, such as heavy display device weight, high assembly process and material costs, dark shadows when using a lamp support frame for the backlight module, and poor and unstable display effects.

[0063] Please refer to Figure 1 , which is a partial cross-sectional structural schematic diagram of a backlight module 1 provided in an embodiment of the present application. The backlight module 1 is used for a display device. The backlight module 1 in the embodiment of the present application adopts a composite film, which has good optical properties and can replace the diffuser plate and optical film of the existing backlight module design.

[0064] For details, please refer to Figure 1 The backlight module 1 in this application includes a back panel 11, a light-emitting element 12, a connecting bracket 13, a composite film 14, and a supporting foam 15. The light-emitting element 12 is capable of emitting light and is mounted on the back panel 11; the connecting bracket 13 is connected to the back panel 11; the composite film 14 is mounted on the connecting bracket 13 and is arranged on the light-emitting side of the light-emitting element 12 (the light-emitting side of the light-emitting element 12 is the side of the light-emitting element 12 away from the back panel body 111) and is spaced apart from the light-emitting element 12. The composite film 14 receives the light emitted by the light-emitting element 12, and atomizes and brightens the light emitted by the light-emitting element 12 to form a surface light source, thereby providing a light source with sufficient brightness and uniform distribution for the display device. The connecting bracket 13 is arranged on the outer peripheral side of the composite diaphragm 14 (the outer peripheral side of the composite diaphragm 14 is the outer side of the edge away from the center part of the composite diaphragm 14, for example, the composite diaphragm 14 is rectangular, and the outer peripheral side of the four outer sides of the composite diaphragm 14) and is connected to the back plate 11. The connecting bracket 13 is configured to connect the edge part of the composite diaphragm 14 to stretch the composite diaphragm 14 outward and make the composite diaphragm 14 straight. The supporting foam 15 is arranged between the back plate 11 and the composite diaphragm 14. One end of the supporting foam 15 abuts against the composite diaphragm 14 to support the composite diaphragm 14, and the other end of the supporting foam 15 abuts against the back plate 11.

[0065] In an embodiment of the present application, the back panel 11 is used to carry related functional components such as the light-emitting element 12 and the connecting bracket 13, and plays the role of supporting and facilitating the assembly of other components. The light-emitting element 12 is used to provide backlight and emit light to the side where the display module 2 is located. It can be understood that the light-emitting element 12 generally includes a plurality of lamp beads. When a plurality of lamp beads emit light at the same time, there will be a situation where the light corresponding to the position of the lamp bead is bright and the light between two adjacent lamp beads is dark, that is, lamp shadows will appear. In an embodiment of the present application, by setting the backlight module 1 to include a composite diaphragm 14, the use of a lamp support frame is avoided. The composite diaphragm 14 can atomize the light emitted by the plurality of lamp beads to form a surface light source, thereby preventing the appearance of lamp shadows. When the backlight module 1 is applied to a display device, the display device can have a more uniform display effect. At the same time, the composite diaphragm 14 also has a brightening effect on the light, so that the light emitted by the light-emitting element 12 can be more fully utilized, and the display device can have a better display effect.

[0066] The backlight module 1 in the present application adopts a composite film 14, eliminating the diffuser plate, optical film, lamp support frame and the corresponding installation structure in the related technology, and adopts a thin composite film 14 to achieve light atomization and brightening, saving material usage. There is no need to assemble the diffuser plate and the optical film separately, and the alignment process of the diffuser plate and the optical film is also saved. The composite film 14 is installed only by connecting the bracket 13, thereby achieving the lightweight backlight module 1 and simplifying the installation process.

[0067] It is understood that the end of the support foam 15 that abuts the composite diaphragm 14 can be connected to the composite diaphragm 14 by gluing, and the end of the support foam 15 that abuts the back plate 11 can be connected to the back plate 11 by gluing. The support foam 15 is arranged adjacent to the edge of the composite diaphragm 14, and the support foam 15 connects the composite diaphragm 14 and the back plate 11. The support foam 15 is arranged along the edge of the composite diaphragm 14. It is understood that the edge of the composite diaphragm 14 is the outer portion away from the center of the composite diaphragm 14. The support foam 15 is arranged along the outer edge of the composite diaphragm 14 and is bonded between the back plate 11 and the composite diaphragm 14. This can better tension and flatten the composite diaphragm 14. After the light emitted by the light-emitting element 12 is atomized by the composite diaphragm 14, the light emission position and angle are more uniform. The support foam 15 can also effectively block the propagation of light, thereby preventing light leakage from the backlight module 1.

[0068] In addition, the supporting foam 15 has good elasticity and buffering effect. On the one hand, it can evenly release the connection pressure between the composite diaphragm 14 and the back panel 11, thereby reducing the deformation of the composite diaphragm 14 due to excessive pressure in certain parts, maintaining the flatness of the composite diaphragm 14, and better connecting the composite diaphragm 14 and the back panel 11. On the other hand, the supporting foam 15 can absorb external vibrations or impacts, thereby reducing the impact of external vibrations or impacts on the composite diaphragm 14, improving the vibration resistance of the backlight module 1, and improving the stability of the installation of the composite diaphragm 14.

[0069] In some embodiments, the back panel 11 includes a back panel body 111, a transition portion 112 and a support portion 113, the first end of the transition portion 112 is connected to the edge portion of the back panel body 111, the second end of the transition portion 112 extends obliquely in a direction away from the back panel body 111 and close to the composite membrane 14, and the support portion 113 is connected to the second end of the transition portion 112; wherein, the light-emitting component 12 is installed on the back panel body 111, the edge portion of the composite membrane 14 is arranged opposite to the support portion 113 (that is, the edge portion of the composite membrane 14 is the portion of the composite membrane 14 that is arranged opposite to the support portion 113), and the support foam 15 is arranged between the support portion 113 and the edge portion of the composite membrane 14, and the other end of the support foam 15 abuts against the support portion 113. It can be understood that the transition portion 112 expands outward relative to the back panel body 111, and the transition portion 112 can connect the support portion 113 with the back panel body 111, and can play a transition role, so that the support portion 113 can be arranged parallel to the composite diaphragm 14 to provide better support for the composite diaphragm 14.

[0070] In some embodiments, the backlight module 1 further includes a reflective sheet 16 , which is disposed on the backplate 11 and is located on the same side of the backplate 11 as the light-emitting element 12 . The reflective sheet 16 is configured to reflect light emitted by the light-emitting element 12 so that the light is concentrated and emitted from the light-emitting side, thereby improving light utilization. Specifically, the reflective sheet 16 includes a reflective portion 161 and a bent portion 162 . The reflective portion 161 is connected to the bent portion 162 , and the bent portion 162 is located on the support portion 113 . The support foam 15 is disposed between the bent portion 162 and an edge portion of the composite film 14 , with the other end of the support foam 15 abutting against the bent portion 162 .

[0071] In some embodiments, please refer to Figure 2 and Figure 3 The connecting bracket 13 includes a mounting seat 131 and a connecting seat 132. The mounting seat 131 is installed on the back plate 11. The connecting seat 132 includes a first mounting portion 1321 and a second mounting portion 1322. The second mounting portion 1322 and the mounting seat 131 are located on the same side of the first mounting portion 1321 and are respectively connected to the first mounting portion 1321. The composite diaphragm 14 is installed on the second mounting portion 1322.

[0072] It is understood that the mounting base 131 is mounted on the back plate 11 to fix the connecting base 132 and provide stable support for it. The second mounting portion 1322 and the mounting base 131 are located on the same side of the first mounting portion 1321 and extend in a direction away from the cover plate 3. The first mounting portion 1321 does not interfere with the cooperation between the second mounting portion 1322 and the composite diaphragm 14, facilitating the installation of the second mounting portion 1322 and the composite diaphragm 14. This layout allows the connecting bracket 13 to cooperate with the installation of the composite diaphragm 14. The structure of the connecting bracket 13 is simple, and there is no need to add additional related structures to separately install the composite diaphragm 14, which also simplifies the installation process.

[0073] In some embodiments, in order to achieve the coordinated installation of the composite diaphragm 14 and the second mounting portion 1322, the composite diaphragm 14 has a connecting hole 141, and the connecting hole 141 is perpendicular to the plate surface of the composite diaphragm 14 (the plate surface of the composite diaphragm 14 is the inner and outer surfaces of the composite diaphragm 14, with the inner and outer surfaces of the composite diaphragm 14). Figure 1Taking the perspective shown as an example, the composite diaphragm 14 is penetrated in the direction of the plate surface (the upper and lower surfaces of the composite diaphragm 14), and the second mounting portion 1322 penetrates the connection hole 141. The second mounting portion 1322 is aligned with at least a portion of the wall surface of the composite diaphragm 14 defining the connection hole 141 to position the composite diaphragm 14 relative to the light-emitting element 12. Optionally, the second mounting portion 1322 can be inserted into the connection hole 141 to prevent the composite diaphragm 14 from easily being removed from the second mounting portion 1322; alternatively, the second mounting portion 1322 can be aligned with a portion of the wall surface of the connection hole 141, while the other portion of the wall surface is spaced apart, so that the second mounting portion 1322 can smoothly penetrate the connection hole 141 and limit the position of the composite diaphragm 14.

[0074] It can be understood that due to the large size of the composite diaphragm 14, by providing a second mounting portion 1322 through a connecting hole 141, the second mounting portion 1322 can be used to tension and stretch the composite diaphragm 14 outward, so that the composite diaphragm 14 can have good flatness and prevent the composite diaphragm 14 from wrinkling, thereby ensuring that the composite diaphragm 14 has good atomization and brightening effects.

[0075] In some embodiments, the second mounting portion 1322 extends in a direction perpendicular to the surface of the composite diaphragm 14, so that the second mounting portion 1322 can directly enter the connecting hole 141 in a direction perpendicular to the surface of the composite diaphragm 14, facilitating the coordinated installation of the composite diaphragm 14 and the second mounting portion 1322. The second mounting portion 1322 can also meet the requirement of flattening the composite diaphragm 14, thereby effectively improving assembly efficiency.

[0076] In some embodiments, reference Figure 2 The first mounting portion 1321 extends in a direction parallel to the surface of the composite diaphragm 14. During installation, the first mounting portion 1321 is parallel to the composite diaphragm 14, preventing the first mounting portion 1321 from interfering with the composite diaphragm 14, so that the composite diaphragm 14 can better maintain its flatness.

[0077] In some embodiments, since the first mounting portion 1321 is parallel to the composite diaphragm 14 and the second mounting portion 1322 is perpendicular to the composite diaphragm 14, the second mounting portion 1322 is perpendicular to the first mounting portion 1321, so that the structural stability of the connecting bracket 13 is stronger and it is easier to cooperate with the installation of the composite diaphragm 14. Figure 2 As shown, the mounting seat 131 and the composite diaphragm 14 are spaced apart, thereby reducing interference between the mounting seat 131 and the composite diaphragm 14 . The installation process of the composite diaphragm 14 is also more flexible, and it is easy to adjust and calibrate the position between the composite diaphragm 14 and the second mounting portion 1322 .

[0078] Please continue to refer to Figure 2 and Figure 3The backlight module 1 further includes a first adhesive layer 1323, which is located on the side of the second mounting portion 1322 facing the connection seat 132. The first adhesive layer 1323 is provided between the composite film 14 and the first mounting portion 1321, and is adhered to the composite film 14 and the first mounting portion 1321, respectively. In order to further stabilize the installation effect of the composite film 14, the first adhesive layer 1323 is used to bond the composite film 14 and the first mounting portion 1321, and is used to reduce the displacement of the composite film 14 during installation, transportation, and use, thereby effectively reducing the possibility of the composite film 14 falling off and ensuring its reliability during long-term use. At the same time, the first adhesive layer 1323 can also ensure the fixing effect of the composite film 14, so that the composite film 14 can maintain the stability of the installation even when it is affected by external vibration or impact.

[0079] Please refer to Figure 2 and Figure 3 In some embodiments, the mounting base 131 includes a first plate 1311 and a second plate 1312. The second plate 1312 is connected between the first mounting portion 1321 and the first plate 1311. The first plate 1311 extends in a direction parallel to the surface of the composite diaphragm 14, and the surface of the first plate 1311 is in contact with the surface of the back plate 11. This effectively improves the installation stability of the first plate 1311 on the back plate 11, thereby providing a stable support base for the second plate 1312 and the connecting base 132. The second plate 1312 connects the first plate 1311 and the first mounting portion 1321. The size of the second plate 1312 in a direction perpendicular to the surface of the composite diaphragm 14 can be selected. The second plate 1312 extends in a direction perpendicular to the surface of the composite diaphragm 14 to reduce interference between the second plate 1312 and other structures.

[0080] Please refer to Figure 4 The composite film 14 has a long side X and a wide side Y, and the number of connecting brackets 13 is set to be multiple; some of the connecting brackets 13 are arranged at intervals along the long side X of the composite film 14 and connected to the edge of the composite film 14; and / or some of the connecting brackets 13 are arranged at intervals along the wide side Y of the composite film 14 and connected to the edge of the composite film 14. In some embodiments, the composite film 14 is rectangular and can be adapted to most display screens, achieving the versatility of the backlight module 1.

[0081] It can be understood that by supporting multiple connecting brackets 13, a multi-point support effect is formed, which can effectively reduce the deformation of the composite diaphragm 14 during use, thereby maintaining the flatness of the composite diaphragm 14 and reducing the problem of uneven display or image distortion caused by the deformation of the composite diaphragm 14. In addition, multiple connecting brackets 13 can provide multiple fixing points for the composite diaphragm 14 to ensure a tighter connection between the composite diaphragm 14 and the back plate 11, thereby achieving uniform fixation of the composite diaphragm 14 in the entire backlight display module, reducing local stress concentration, and increasing the actual service life of the composite diaphragm 14. For example, when the composite diaphragm 14 is rectangular, multiple connecting brackets 13 are respectively arranged at intervals on the two edges of the long side X of the composite diaphragm 14, and multiple connecting brackets 13 are respectively arranged at intervals on the two edges of the wide side Y of the composite diaphragm 14. The four edge areas of the composite diaphragm 14 are supported by multiple connecting brackets 13 to flatten the composite diaphragm 14, thereby achieving a good limiting effect.

[0082] like Figure 5-7 1 is a schematic structural diagram of a composite film 14 according to an embodiment of the present application. The composite film 14 includes a first optical film 100. The first optical film 100 includes a first substrate 110, a first optical layer 120 and a microstructure layer 130. The microstructure layer 130 is connected to the first surface of the first substrate 110 (the surface facing away from the light-emitting element 12), and the first optical layer 120 is connected to the second surface of the first substrate 110 (the surface facing the light-emitting element 12).

[0083] The microstructure layer 130 includes a plurality of microprisms for brightening light, such as Figure 2 As shown, the microprism has an edge angle α, that is, the microprism has at least two optical surfaces facing away from the first substrate 110, and the two adjacent optical surfaces are connected at an angle. The angle between the two adjacent surfaces is the edge angle α of the microprism. The edge angle of the microprism is α, 85°≤α≤105°. For example, α can be 85°, 90°, 95°, 100°, 105°, or any range thereof. For example, when the microprism is a strip prism with two optical surfaces, the edge angle of the microprism is the angle between the two optical surfaces. When the microprism is a cone prism with three optical surfaces, the minimum angle between two adjacent optical surfaces is the edge angle of the microprism.

[0084] Among them, the structure of the microprism includes a right-angle prism structure, a trapezoidal prism structure, a triangular prism structure, a hemispherical prism structure, a conical prism structure and a composite prism structure, etc. In this application, different microprism structures can be selected according to actual needs, and there is no restriction here.

[0085] The first optical layer 120 includes a uniformly mixed first optical adhesive 121 and diffusion particles 122, the diffusion particles 122 include a first refractive material and a reflective material. Based on the total weight of the first optical adhesive 121, the weight percentage of the diffusion particles 122 is A, the weight percentage of the first refractive material is a1, and the weight percentage of the reflective material is a2, wherein 10.5wt.%≤A≤22.0wt.%, 0.4≤a1 / a2≤2.0, for example, A can be 10.5wt.%, 13.4wt.%, 15.5wt.%, 18.0wt.%, 22.0wt.% or any range thereof, and a1 / a2 can be 0.6, 0.7, 0.9, 1.2, 1.4 or any range thereof.

[0086] In the embodiment of the present application, the first optical film 100 of the composite film 14 includes a first optical layer 120 and a microstructure layer 130. The first optical adhesive 121 of the first optical layer 120 can allow light to pass through. The first refractive material of the first optical layer 120 can scatter light. The reflective material of the first optical layer 120 can reflect light. By selecting the weight percentage a1 of the first refractive material and the weight percentage a2 of the reflective material to satisfy 0.4≤a1 / a2≤2.0, the first refractive material and the reflective material can be combined to achieve the effect of atomizing light in the first optical adhesive 121. The weight percentage A satisfies 10.5wt.%≤A≤22.0wt.%, and the amount of the diffusion particles 122 is appropriate, so that the angle of the light after the direction is changed by the diffusion particles 122 is greater, and the uniform light atomization effect is better. In addition, the microstructure layer 130 is selected to have multiple microprisms, and the edge angle α of the microprism satisfies 85°≤α≤105°. The microstructure layer 130 can cooperate to receive the light passing through the first optical layer 120, maintain the atomization effect of the first optical layer 120 on the light, and can also fully reflect the light greater than the total reflection angle. Only the light with a small angle can be refracted and transmitted, thereby achieving a brightening effect. Therefore, the composite film 14 of the embodiment of the present application can play both an atomization role and a brightening role on the light, and can replace the diffusion plate and optical film in the related art and be applied to the backlight module, simplifying the structure of the backlight module, simplifying the assembly process, saving material consumption, and reducing the space occupied by the backlight module. When A exceeds the upper limit of 22.0wt.%, the amount of diffusion particles 122 used is too much, the particle distribution density is large and a multi-layer diffusion arrangement structure has been formed. The light has been refracted or totally reflected many times, and the atomization effect is not further improved. When A is lower than the lower limit of 10.5wt.%, the amount of diffusion particles 122 used is too little, the density of diffusion particles is small, and it is difficult to meet the atomization and brightening requirements. When a1 / a2 exceeds the upper limit of 1.4, the content of the first refractive material is too much, the atomization effect is better, but it is easy to cause insufficient brightness of the light passing through the composite film 14. When a1 / a2 is lower than the lower limit of 0.6, the content of the reflective material is too much, the atomization effect of the light is poor, and light and shadow are easy to appear.

[0087] In some embodiments, 4.0 wt.% ≤ a1 ≤ 10.0 wt.%. For example, a1 can be 4.0 wt.%, 5.3 wt.%, 6.5 wt.%, 8.5 wt.%, 10.0 wt.%, or any range thereof. Within the above range, the first refractive material is used in an appropriate amount and has a good light scattering effect, thereby cooperating with the reflective material to enhance the atomization effect of light.

[0088] In some embodiments, the first refractive material includes at least one of polymethyl methacrylate (PMMA), 2-methyl-2-butyl acrylate monomer (PBMA), polycarbonate (PC), polystyrene (PS), and polypropylene (PP). The above materials are usually present in the form of spherical particles, and the particles are uniform. The above materials also have a good refractive effect on light, so that the first refractive material can effectively scatter light and appear transparent or translucent without affecting the color of the underlying material. At the same time, it also has good heat resistance and can remain stable in high temperature environments.

[0089] In some embodiments, 4.0 wt.% ≤ a2 ≤ 13.0 wt.%. For example, a2 can be 4.0 wt.%, 6.5 wt.%, 8.8 wt.%, 10.0 wt.%, 13.0 wt.%, or any range thereof. Within the above range, the amount of the reflective material is appropriate, and it has a good reflective effect on light, so that the amount and angle of light emitted from the first optical layer 120 are appropriate, thereby improving the atomization effect.

[0090] In some embodiments, the reflective material includes at least one of TiO2 and SiO2. TiO2 has a relatively high refractive index and typically exists in the form of spherical or nearly spherical particles. The concave-convex structure on the surface of TiO2 particles can also scatter light, effectively scattering light and producing a uniform light scattering effect. Furthermore, TiO2 is white, possessing excellent hiding power and whiteness. TiO2 also has good light resistance and is not easily discolored by long-term exposure to sunlight. SiO2 has a relatively low refractive index and typically exists in the form of spherical or nearly spherical particles. SiO2 particles have a uniform size and shape, enabling them to effectively scatter light. SiO2 is transparent or translucent, and does not affect the color of the underlying material. SiO2 also has good heat resistance and can remain stable in high-temperature environments.

[0091] In some embodiments, the particle size of the first refractive material is r1, where 1 μm ≤ r1 ≤ 50 μm. For example, r1 can be 1 μm, 4 μm, 8 μm, 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, or any range thereof. Within the above range, the first refractive material can effectively scatter light, optimize the atomization effect, and uniformly mix the first refractive material into the first optical adhesive 121.

[0092] In some embodiments, the particle size of the reflective material is r2, 0.1 μm ≤ r2 ≤ 20 μm. For example, r2 can be 0.1 μm, 0.6 μm, 1 μm, 2 μm, 6 μm, 10 μm, 14 μm, 20 μm, or any range thereof. Within the above range, the reflective material can effectively reflect light, optimize the atomization effect, and minimize light loss, thereby improving the incremental effect and allowing the reflective material to be evenly mixed in the first optical adhesive 121.

[0093] In some embodiments, the thickness of the first optical layer 120 is m1, where 5 μm ≤ m1 ≤ 15 μm. For example, m1 can be 5 μm, 6 μm, 7 μm, 8 μm, 10 μm, 12 μm, 15 μm, or any range thereof. Within the above range, the first refractive material and the reflective material can be evenly dispersed in the first optical adhesive 121, ensuring that the optical path length of light entering the first optical layer 120 is appropriate, thereby improving the hazing effect and achieving a good brightening effect.

[0094] In some embodiments, the first refractive material and the reflective material may be added to the liquid first optical adhesive 121, mixed evenly, and then evenly coated on the surface of the first substrate 110. The first optical layer 120 may be formed after the first optical adhesive 121 is cured.

[0095] In some embodiments, the thickness of the first substrate 110 is m2, where 100 μm ≤ m2 ≤ 300 μm. For example, m2 can be 100 μm, 130 μm, 160 μm, 180 μm, 220 μm, 250 μm, 300 μm, or any range thereof. Within the above range, the first substrate 110 can provide good support for the first optical layer 120 and the microstructure layer 130, preventing the first optical layer 120 and the microstructure layer 130 from being deformed and broken due to bending of the first substrate 110. Furthermore, the first optical layer 120 and the microstructure layer 130 can be stably attached to the surface of the first substrate 110, facilitating processing.

[0096] In some embodiments, the material of the first substrate 110 includes at least one of polycarbonate, polyethylene terephthalate, polystyrene, polyethylene, and polymethyl methacrylate. By using the above materials, the first substrate 110 has good light transmittance and little light deflection.

[0097] In some embodiments, the microstructure layer 130 completely covers the first surface (the surface facing away from the light source) of the first substrate 110 , so that all light passing through the first substrate 110 can reach the microstructure layer 130 .

[0098] In some embodiments, the edge spacing between two adjacent microprisms of the microstructure layer 130 is L1, and 110 μm ≤ L1 ≤ 300 μm. For example, L1 can be 110 μm, 150 μm, 180 μm, 200 μm, 240 μm, 300 μm, or any range thereof. Within the above range, the optical path and angle of light propagating between the multiple microprisms can be appropriate, thereby optimizing the brightness enhancement effect.

[0099] In some embodiments, the thickness of the microstructure layer 130 is g, and 30 μm ≤ g ≤ 70 μm. For example, g can be 30 μm, 33 μm, 40 μm, 45 μm, 50 μm, 60 μm, 70 μm, or any range thereof. Within the above range, the optical path length of light entering the microstructure layer 130 is appropriate to improve the hazing and brightening effects, and the microstructure layer 130 has good structural strength and is not easily broken.

[0100] In some embodiments, the height of the microprism is h, 5μm≤h≤50μm, for example, h can be 5μm, 8μm, 10μm, 15μm, 20μm, 30μm, 50μm or any range thereof. The microstructure layer 130 of the embodiment of the present application can be formed by spraying 5μm to 50μm steel sand or quartz sand on the surface of the roller mold to form a structure with pits on the surface, coating a layer of optical glue on the surface of the first substrate 110, and then rolling the optical glue with the roller mold with pits on the surface, and after UV curing, forming a microstructure layer 130 with microprisms. By selecting the height of the microprisms within the above range, the microstructure layer 130 can improve the fogging and brightening effects while also making the microprisms sharp enough to bond with other structures and prevent the microprisms from easily breaking. In the embodiment of the present application, the shape of the steel sand or quartz sand sprayed on the surface of the roller mold can be used to prepare microprisms with the desired edge angle α.

[0101] In some embodiments, the material of the microstructure layer 130 includes UV glue.

[0102] In some embodiments, the composite film 14 further includes a diffusion film 200 , which is disposed on one side of the first surface of the first optical film 100 . The diffusion film 200 can further atomize the light passing through the microstructure layer 130 , thereby further improving the uniformity of the light passing through the composite film 14 .

[0103] like Figure 6As shown, the diffusion film 200 includes a second substrate 210 and a second optical layer 220. The second optical layer 220 is connected to the surface of the second substrate 210 facing away from the first optical film 100. The second optical layer 220 includes a second optical adhesive 221 and a second refractive material 222. Based on the total weight of the second optical adhesive 221, the weight percentage of the second refractive material 222 is a3, 3wt.%≤a3≤10wt.%. The second refractive material 222 further scatters light, so that the first optical film 100 and the diffusion film 200 cooperate to achieve better light atomization and brightness enhancement effects.

[0104] In some embodiments, the particle size of the second refractive material 222 is r3, 1 μm ≤ r3 ≤ 50 μm, so that the second refractive material 222 can be evenly dispersed in the second optical adhesive 221. The second refractive material 222 includes at least one of polymethyl methacrylate (PMMA), 2-methyl-2-butyl acrylate (PBMA), polycarbonate (PC), polystyrene (PS), and polypropylene (PP).

[0105] In some embodiments, the thickness of the second optical layer 220 is n1, 13 μm≤n1≤19 μm, so that the optical path of the light entering the second optical layer 220 is appropriate, and the atomization effect and the light enhancement effect are improved.

[0106] In some embodiments, the second refractive material 222 can be added to a liquid second optical adhesive 221, mixed evenly, and then evenly coated on the surface of the second substrate 210. After the second optical adhesive 221 is cured, the second optical layer 220 is formed. The first optical adhesive 121 and the second optical adhesive 221 can be made of optical adhesives with the same refractive index.

[0107] In some embodiments, the thickness of the second substrate 210 is n2, where 100 μm ≤ n2 ≤ 300 μm. The material of the second substrate 210 includes at least one of polycarbonate, polyethylene terephthalate, polystyrene, polyethylene, and polymethyl methacrylate. Using these materials, the first substrate 110 has good light transmittance and minimal light deflection.

[0108] In some embodiments, as Figure 5 As shown, the first optical film 100 and the diffusion film 200 are integrally provided. For example, an adhesive material 400 is provided between the first optical film 100 and the diffusion film 200 to bond the first optical film 100 and the diffusion film 200 together to form a composite film sheet 14. In some embodiments, as Figures 3 to 6As shown, the composite film 14 further includes a light-enhancing layer 300, which is connected between the first optical film 100 and the diffuser film 200. The first optical film 100, the light-enhancing layer 300, and the diffuser film 200 are integrally arranged. For example, an adhesive material 400 is provided between the first optical film 100, the light-enhancing layer 300, and the diffuser film 200, and the first optical film 100, the light-enhancing layer 300, and the diffuser film 200 are bonded together to form the composite film 14. The adhesive material 400 provided between any two adjacent layers of the first optical film 100, the light-enhancing layer 300, and the diffuser film 200 in the composite film 14 can be a liquid optical adhesive that fills the gap between the layers. After the liquid optical adhesive is cured, the various layers of the composite film 14 are solidified into a single structure to form the composite film 14, which can be assembled into the backlight module 1.

[0109] Alternatively, as Figure 6 As shown, the light-enhancing layer 300 includes a 0° light-enhancing film; or, the light-enhancing layer 300 includes a 90° light-enhancing film; or, as shown Figure 7 As shown, the light enhancement layer 300 includes a first light enhancement film 310 and a second light enhancement film 320 that are stacked. The first light enhancement film 310 has a first prism, and the second light enhancement film 320 has a second prism. The angle difference between the first prism and the second prism is 90°, and the one with the larger angle between the first light enhancement film 310 and the second light enhancement film 320 is placed on the side of the other facing the diffusion film 200 to achieve the purpose of brightness enhancement.

[0110] When the light enhancement layer 300 includes the first light enhancement film 310 and the second light enhancement film 320, optionally, as Figure 7 As shown, the edge angle of the first prism of the first bright enhancement film 310 is 0°, that is, the first bright enhancement film 310 is a 0° bright enhancement film, and the edge angle of the second prism of the second bright enhancement film 320 is 90°, that is, the second bright enhancement film 320 is a 90° bright enhancement film; or, the edge angle of the first prism of the first bright enhancement film 310 is 8°, and the edge angle of the second prism of the second bright enhancement film 320 is 98°; or, the edge angle of the first prism of the first bright enhancement film 310 is 45°, and the edge angle of the second prism of the second bright enhancement film 320 is 135°.

[0111] Second, please refer to Figure 8 and Figure 9 The present embodiment provides a display device 1000, comprising the aforementioned backlight module 1. The backlight module 1 comprises a backplane 11, a light-emitting element 12, a connecting bracket 13, a composite film 14, and a supporting foam 15. Furthermore, the display device 1000 further comprises a display module 2, which comprises a liquid crystal display 21. The liquid crystal display 21 is laminated on the side of the composite film 14 facing away from the light-emitting element 12. Light emitted by the light-emitting element 12 is atomized and brightened by the composite film 14 before being transmitted to the liquid crystal display 21, providing a good backlighting effect for the liquid crystal display 21.

[0112] The display device 1000 in the embodiment of the present application includes a backlight module 1. The specific structure of the backlight module 1 refers to the above embodiment. Since the display device 1000 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0113] In a third aspect, the embodiment of the present application further provides a display device 1000, comprising a display module 2 and the above-mentioned backlight module 1. In addition, please refer to Figures 8 and 9 The display device 1000 further includes a frame 4, a connecting bracket 13 connected to the frame 4, and the frame 4 connected to the back panel 11, so that the connecting bracket 13 is mounted on the back panel 11 through the frame 4. The frame 4 includes a main body 41 and an extension 42. The main body 41 is disposed on the periphery of the cover panel 3, and the extension 42 extends along the edge of the top surface of the cover panel 3. The connecting bracket 13 is connected to the main body 41, and the edge of the cover panel 3 is disposed between the extension 42 and the connecting bracket 13. The extension 42 and the connecting bracket 13 jointly secure the cover panel 3. The cover panel 3 is located on the side of the liquid crystal display 21 facing away from the composite film 14, and the surface of the cover panel 3 is in contact with the surface of the connecting bracket 13.

[0114] It is understood that in the related art, backlight module 1 uses a diffuser plate and optical film combination to process the light emitted by light-emitting element 12. The display device 1000 of the present application eliminates the original diffuser plate and its corresponding mounting structure. The light emitted by light-emitting element 12 is atomized and brightened by composite film 14 before being transmitted to liquid crystal display 21. Cover plate 3 is used to protect display module 2, and connecting bracket 13 provides support for cover plate 3.

[0115] Specifically, the top surface of the cover plate 3 is the side away from the liquid crystal display screen 21, the edge portion of the cover plate 3 is the peripheral side away from the center position, and the extension portion 42 extends to the edge of the cover plate 3 to play a role in fixing the cover plate 3. It can be understood that, referring to Figures 8 and 9 The extension portion 42 and the connecting bracket 13 clamp the cover plate 3 along the up and down directions.

[0116] The connecting bracket 13 is mounted on the frame 4, and the frame 4 is mounted on the back plate 11, so that the connecting bracket 13 is mounted on the back plate 11 through the frame 4. In the embodiment of the present application, the edges of the frame 4 and the back plate 11 are connected, a portion of the connecting bracket 13 is fixedly mounted on the frame 4, and the other portion is connected to the composite diaphragm 14. It can be understood that the edge of the back plate 11 is provided with a protrusion along the direction close to the frame 4, and the frame 4 is provided with a recess on the side close to the back plate 11, so that the frame 4 and the back plate 11 are correspondingly inserted, and screw holes and screw connectors are respectively provided between the frame 4 and the back plate 11 for matching fixation.

[0117] Specifically, the connecting bracket 13 includes a mounting base 131 and a connecting base 132. The mounting base 131 is connected to the frame 4. The connecting base 132 includes a first mounting portion 1321 and a second mounting portion 1322. The second mounting portion 1322 and the mounting base 131 are located on the same side of the first mounting portion 1321 and are respectively connected to the first mounting portion 1321. The composite diaphragm 14 is mounted on the second mounting portion 1322. The edge of the cover plate 3 is disposed between the extension portion 42 and the first mounting portion 1321. The extension portion 42 and the first mounting portion 1321 jointly secure the cover plate 3. This allows the connecting bracket 13 to simultaneously support the installation of the cover plate 3 and the composite diaphragm 14. The connecting bracket 13 has a simple structure and eliminates the need for additional structures to separately install the cover plate 3 and the composite diaphragm 14, thereby simplifying the installation process.

[0118] In addition, to ensure the fixing effect between the connecting bracket 13 and the frame 4, the mounting base 131 has a mounting hole 1311a, and the frame 4 is provided with a matching groove 41 corresponding to the mounting hole 1311a. The display device 1000 also includes a locking member 5 disposed in the mounting hole 1311a and the matching groove 41 to connect the mounting base 131 to the frame 4. The locking member 5 includes a threaded connection that can provide a stable connection effect, improve the installation stability between the mounting base 131 and the frame 4, reduce the phenomenon of displacement of the mounting base 131 during use, and further optimize the display effect. In some other embodiments, the mounting base 131 and the frame 4 can also be fixed by plug-in connection, snap-on connection, etc., which is not limited in this application.

[0119] Fourthly, an embodiment of the present application provides a touch display device, including the above-mentioned backlight module 1 or the above-mentioned display device 1000. The touch display device also includes a touch component, which is used to detect the state of an external object (such as a finger or a stylus) approaching the display module 2 to realize touch operation, thereby realizing human-computer interaction functions more intuitively.

[0120] The touch display device provided in the embodiment of the present application can be a smart interactive tablet, a conference tablet, a smart blackboard / whiteboard, etc.

[0121] When the touch display device includes the above-mentioned backlight module 1, the specific structure of the backlight module 1 refers to the above-mentioned embodiment. When the touch display device includes the above-mentioned display device 1000, the specific structure of the display device 1000 refers to the above-mentioned embodiment. Since the touch display device 1000 adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0122] In some embodiments, please refer to Figure 10The touch component can be an infrared touch component, which includes an infrared touch module 7. The part of the infrared touch module 7 used to receive and emit light extends out of the surface of the cover plate 3 facing away from the liquid crystal display screen 21. The infrared touch module 7 detects the position of external objects (such as fingers or styluses) by emitting and receiving infrared light to achieve touch operation. Since the infrared touch module 7 does not rely on physical contact with the screen surface, it reduces wear and scratches on the screen surface. Infrared sensors usually have a long service life and low maintenance costs, which can effectively control the cost of touch display devices. When the touch assembly includes an infrared touch module 7, the main body 41 and the extension 42 of the frame 4 enclose a housing cavity 43 and a light opening 44 communicating with the housing cavity. The light opening 44 is located on the side of the cover away from the light-emitting element. The infrared touch module 7 is disposed within the housing cavity and includes a transmitter and a receiver. The transmitter has a transmitting end for emitting infrared light, and the receiver has a receiving end for receiving infrared light. The transmitting end and the receiving end are respectively arranged toward the corresponding light opening 44, so that the infrared light emitted by the transmitter can pass through the light opening 44 and be received by the receiving end of the receiver, forming a touch network. A filter 8 is installed at the light opening 44 to filter out stray light other than infrared light.

[0123] In other embodiments, please refer to Figure 8 The touch component can be a capacitive touch component, including a capacitive touch film 6; the capacitive touch film 6 is disposed between the liquid crystal display 21 and the cover plate 3; or, the capacitive touch film 6 is disposed between the liquid crystal display 21 and the composite film 14. It is understood that the capacitive touch film 6 can provide higher touch sensitivity and response speed, support multi-touch, allow multiple fingers to operate simultaneously, and realize complex gestures such as zooming and rotating. In addition, the capacitive touch film 6 is located between the liquid crystal display 21 and the composite film 14, which can reduce the overall thickness of the device, making it lighter and thinner. It is suitable for touch display devices with strict thickness requirements.

[0124] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A backlight module (1) for a display device (1000), characterized in that: The backlight module (1) comprises a back plate (11), a light-emitting element (12), a connecting bracket (13), a composite membrane (14) and a supporting foam (15), wherein the light-emitting element (12) is mounted on the back plate (11) and is used to emit light; The composite film (14) is arranged on the light-emitting side of the light-emitting element (12) and is spaced apart from the back plate (11). The composite film (14) is used to receive the light emitted by the light-emitting element (12), and atomize and brighten the light emitted by the light-emitting element (12) to form a surface light source. The connecting bracket (13) is arranged on the outer peripheral side of the composite diaphragm (14) and is connected to the back plate (11). The connecting bracket (13) is configured to connect the edge portion of the composite diaphragm (14) to tension the composite diaphragm (14) outward and make the composite diaphragm (14) straight. The supporting foam (15) is arranged between the back plate (11) and the composite diaphragm (14). One end of the supporting foam (15) abuts against the composite diaphragm (14) to support the composite diaphragm (14), and the other end of the supporting foam (15) abuts against the back plate (11).

2. The backlight module (1) according to claim 1, characterized in that: The connecting bracket (13) comprises: A mounting seat (131) connected to the back plate (11); The connecting seat (132) comprises a first mounting portion (1321) and a second mounting portion (1322), wherein the second mounting portion (1322) and the mounting seat (131) are located on the same side of the first mounting portion (1321) and are respectively connected to the first mounting portion (1321), and the composite diaphragm (14) is mounted on the second mounting portion (1322).

3. The backlight module (1) according to claim 2, characterized in that: The edge portion of the composite diaphragm (14) has a connecting hole (141), the second mounting portion (1322) is passed through the connecting hole (141), and the second mounting portion (1322) is in contact with at least a portion of the wall surface of the connecting hole (141) to tighten the composite diaphragm (14) outward.

4. The backlight module (1) according to claim 2, characterized in that: The second mounting portion (1322) extends in a direction perpendicular to the plate surface of the composite diaphragm (14); and / or, The first mounting portion (1321) extends in a direction parallel to the plate surface of the composite diaphragm (14).

5. The backlight module (1) according to claim 2, characterized in that: The backlight module (1) further comprises a first adhesive layer (1323), wherein the first adhesive layer (1323) is provided between the composite film (14) and the first mounting portion (1321), and is respectively bonded to the composite film (14) and the first mounting portion (1321).

6. The backlight module (1) according to claim 2, characterized in that: The mounting seat (131) includes a first plate body (1311) and a second plate body (1312), wherein the second plate body (1312) is connected between the first mounting portion (1321) and the first plate body (1311), and the first plate body (1311) extends in a direction parallel to the surface of the composite membrane (14), and the surface of the first plate body (1311) is in contact with the surface of the back plate (11).

7. The backlight module (1) according to claim 2, characterized in that: The composite diaphragm (14) is a rectangular diaphragm having a long side (X) and a wide side (Y), and the number of the connecting brackets (13) is multiple; Part of the connecting brackets (13) are arranged at intervals along the long side (X) of the composite membrane (14) and connected to the edge portion of the composite membrane (14); and / or, Some of the connecting brackets (13) are arranged at intervals along the wide side (Y) of the composite diaphragm (14) and are connected to the edge portion of the composite diaphragm (14).

8. The backlight module (1) according to claim 2, characterized in that: The composite film (14) comprises a first optical film (100), a light-enhancing layer (300), and a diffusion film (200) stacked in sequence; The first optical film (100) comprises a first substrate (110), a first optical layer (120), and a microstructure layer (130), wherein the microstructure layer (130) is connected to a first surface of the first substrate (110), and the first optical layer (120) is connected to a second surface of the first substrate (110); The diffusion film (200) comprises a second substrate (210) and a second optical layer (220), wherein the second optical layer (220) is connected to a surface of the second substrate (210) facing away from the first optical film (100); The light-enhancing layer (300) comprises a first light-enhancing film (310) and a second light-enhancing film (320) stacked together, wherein the first light-enhancing film (310) has a first prism, and the second light-enhancing film (320) has a second prism, and the angle difference between the first prism and the second prism is 90°.

9. A display device (1000), characterized in that: comprising a display module (2) and a backlight module (1) according to any one of claims 1 to 8, The display module (2) comprises a liquid crystal display screen (21), and the liquid crystal display screen (21) is stacked on a side of the composite film (14) facing away from the light-emitting element (12).

10. A display device (1000), characterized in that: The display device (1000) comprises a display module (2) and a backlight module (1) according to any one of claims 2 to 8, wherein the display module (2) comprises a liquid crystal display screen (21), and the liquid crystal display screen (21) is stacked on a side of the composite film (14) facing away from the light-emitting element (12); the display device (1000) further comprises a cover plate (3) and a frame (4), the connecting bracket (13) is connected to the frame (4), and the frame (4) is connected to the back plate (11), so that the connecting bracket (13) is connected to the back plate (11) through the frame (4); The frame (4) comprises a main body (41) and an extension (42), wherein the main body (41) is arranged on the outer periphery of the cover plate, and the extension (42) extends along the top surface of the edge portion of the cover plate (3), the connecting bracket (13) is connected to the main body (41), and the edge portion of the cover plate (3) is arranged between the extension (42) and the connecting bracket (13), and the extension (42) and the connecting bracket (13) jointly fix the cover plate (3).

11. The display device (1000) according to claim 10, characterized in that The mounting seat (131) is connected to the frame (4); the edge portion of the cover plate (3) is arranged between the extension portion (42) and the first mounting portion (1321), and the extension portion (42) and the first mounting portion (1321) jointly fix the cover plate (3).

12. A touch display device, characterized in that: Including touch components; The touch display device further comprises a backlight module (1) according to any one of claims 1 to 8; or The touch display device further comprises the display device (1000) according to any one of claims 9 to 11.

Images