Backlight module and display device

Abstract

The application discloses a backlight module and a display device, and belongs to the technical field of display. The backlight module comprises a shell, a light source and a plurality of optical films. The shell comprises a back plate and a side plate which are connected. The side plate comprises at least a first side plate. In the direction perpendicular to the light-out surface of the backlight module, the side of the first side plate away from the back plate comprises a step structure. A first edge cover plate is fixedly arranged on the step structure. In the direction perpendicular to the light-out surface of the backlight module, the side of the first edge cover plate away from the back plate further comprises a plurality of first buckles. The side of the first side plate away from the back plate is provided with a plurality of first clamping grooves corresponding to the first buckles. The first edge cover plate is fixed with the first side plate by being clamped in the first clamping grooves through the first buckles. The display device comprises a display panel and the backlight module described above which are oppositely arranged. The application can realize a narrow frame, improve the firmness of the whole backlight module, avoid the optical films from being damaged, and ensure the display effect.

Description

Backlight module and display device

[0001] This application is a divisional application filed on September 30, 2021, with application number 202111165349.7, entitled "Backlight Module and Display Device". Technical Field

[0002] This invention relates to the field of display technology, and more specifically, to a backlight module and a display device. Background Technology

[0003] Liquid Crystal Displays (LCDs) have numerous advantages, including thinness, energy efficiency, and no radiation, leading to their widespread application. They are used in LCD TVs, mobile phones, personal digital assistants (PDAs), digital cameras, computer screens, and laptop screens, dominating the flat panel display field. LCDs are the display components used in the vast majority of mobile phone products. Traditional LCDs consist of a liquid crystal display (LCD), a backlight module, and driving circuitry. The LCD is a passively emitting component, and the backlight module provides a uniform surface light source for it. With the emergence of narrow-bezel mobile terminals, mobile terminals using LCD displays are showing an increasingly narrow bezel trend. Correspondingly, the bezel of the backlight module, which provides the light source for the LCD, also needs to be further narrowed to meet the narrow-bezel requirements of mobile terminals.

[0004] In existing backlight modules, the housing is typically made of sheet metal. The main function of the sheet metal is to support the glass substrate in the display panel, and its strength is much higher than that of a typical plastic frame. With the development of cast aluminum modules and large-size modules, more and more backlights are using cast aluminum housings. However, there is often insufficient width in the cast aluminum housing to design a step to support the sheet metal, making it difficult for cast aluminum modules to further develop into narrow bezels. Moreover, the pressure after assembling or bonding the glass substrate of the display panel often causes the sheet metal to collapse and damage the optical films in the backlight module, causing film waving (referring to film warping, resulting in an uneven surface and a wavy appearance), which can easily affect the picture quality of the LCD display device.

[0005] Therefore, how to provide a backlight module and display device that can achieve a narrow bezel while improving the load-bearing strength of the backlight housing and preventing display defects is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the present invention provides a backlight module and a display device to solve the problem in the prior art that, in order to achieve a narrow bezel, the glass substrate in the assembled display panel is easily damaged by the optical film in the backlight module, causing display defects.

[0007] This invention discloses a backlight module, including a housing, a light source, and multiple optical films. The housing forms a space to accommodate the light source and the multiple optical films. The housing includes a connected back plate and a side plate. The extension direction of the back plate is parallel to the light-emitting surface of the backlight module, and the extension direction of the side plate intersects the light-emitting surface of the backlight module. The side plate includes at least a first side plate. In a direction perpendicular to the light-emitting surface of the backlight module, the side of the first side plate away from the back plate includes a stepped structure, on which a first edge plate is fixedly disposed. In a direction perpendicular to the light-emitting surface of the backlight module, the side of the first edge plate away from the back plate also includes multiple first buckles. The extension direction of the first buckles is parallel to the light-emitting surface of the backlight module, and the first buckles extend towards the direction close to the first side plate. The side of the first side plate away from the back plate has multiple first slots corresponding to the first buckles. The first edge plate is fixed to the first side plate by being snapped into the first slots by the first buckles.

[0008] Based on the same inventive concept, the present invention also discloses a display device, which includes a display panel and the aforementioned backlight module disposed opposite to each other, the display panel being located on one side of the light-emitting surface of the backlight module; the display panel being disposed on a first edge plate.

[0009] Compared with the prior art, the backlight module and display device provided by the present invention achieve at least the following beneficial effects:

[0010] The backlight module housing provided by this invention includes a connected back plate and side plates. The extension direction of the back plate is parallel to the light-emitting surface of the backlight module. The back plate serves as a support for various structures of the backlight module, allowing structures such as light sources and optical films to be placed on it. The extension direction of the side plates intersects with the light-emitting surface of the backlight module. The side plates enclose the light sources, optical films, and other structures within the area of ​​the back plate, and also serve as a support for the display panel, ensuring good support performance of the housing for the display panel. The side plates include at least a first side plate. In the direction perpendicular to the light-emitting surface of the backlight module, the side of the first side plate away from the back plate includes a stepped structure. The stepped structure is used to fix a first edge plate. By having the stepped structure and the first edge plate jointly support the weight of the display panel, the backlight module's bezel can be designed to be narrower by limiting the width of the stepped structure in the direction parallel to the light-emitting surface of the backlight module, while ensuring the support effect of the stepped structure. This facilitates the further development of narrow bezels in display devices using this backlight module. Furthermore, the present invention also provides a first buckle of the first edge plate that is embedded in the first slot of the first side plate to fix the first edge plate to the first side plate. The first buckle being embedded in the first slot can improve the load-bearing capacity and strength of the first edge plate. In the direction perpendicular to the light-emitting surface of the backlight module, it prevents the first edge plate from collapsing under the pressure of the weight of the display panel after the display panel is assembled, thus preventing damage to the optical film. This helps to improve the firmness of the entire backlight module and ensure the display effect.

[0011] Of course, any product implementing this invention need not necessarily achieve all of the technical effects described above at the same time.

[0012] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0013] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0014] Figure 1 is a schematic diagram of a planar structure of a backlight module provided in an embodiment of the present invention;

[0015] Figure 2 is a schematic diagram of the cross-sectional structure along line A-A' in Figure 1;

[0016] Figure 3 is a schematic diagram of the cross-sectional structure along the B-B' direction in Figure 1;

[0017] Figure 4 is a partially enlarged structural diagram of the first side panel position after the backlight module and display panel are assembled in this embodiment;

[0018] Figure 5 is a schematic diagram of another cross-sectional structure along the A-A' direction in Figure 1;

[0019] Figure 6 is a schematic diagram of another cross-sectional structure along the A-A' direction in Figure 1;

[0020] Figure 7 is an enlarged view of a structure in region C of Figure 1;

[0021] Figure 8 is an enlarged view of another structure of region C in Figure 1;

[0022] Figure 9 is an enlarged view of another structure of region C in Figure 1;

[0023] Figure 10 is a schematic diagram of another cross-sectional structure along the A-A' direction in Figure 1;

[0024] Figure 11 is a schematic diagram of another planar structure of the backlight module provided in an embodiment of the present invention;

[0025] Figure 12 is a schematic diagram of the cross-sectional structure along the D-D' direction in Figure 11;

[0026] Figure 13 is a partially enlarged structural diagram of the second side panel position after the backlight module and display panel are assembled in this embodiment;

[0027] Figure 14 is a schematic diagram of the cross-sectional structure along D-D' in Figure 11;

[0028] Figure 15 is a schematic diagram of the cross-sectional structure along D-D' in Figure 11;

[0029] Figure 16 is a schematic diagram of another planar structure of the backlight module provided in an embodiment of the present invention;

[0030] Figure 17 is a schematic diagram of the cross-sectional structure along the F-F' direction in Figure 16;

[0031] Figure 18 is a schematic diagram of the cross-sectional structure along the G-G' direction in Figure 16;

[0032] Figure 19 is an enlarged view of a structure in region I of Figure 16;

[0033] Figure 20 is an enlarged view of another structure of region I in Figure 16;

[0034] Figure 21 is a schematic diagram of another cross-sectional structure along the F-F' direction in Figure 16;

[0035] Figure 22 is a schematic diagram of a planar structure of a display device provided in an embodiment of the present invention;

[0036] Figure 23 is a schematic diagram of the cross-sectional structure along the J-J' direction in Figure 22;

[0037] Figure 24 is a schematic diagram of another cross-sectional structure along the J-J' direction in Figure 22. Detailed Implementation

[0038] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0039] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0040] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0041] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0043] Please refer to Figures 1-4. Figure 1 is a schematic diagram of a planar structure of a backlight module provided in an embodiment of the present invention (it can be understood that, in order to clearly illustrate the structure of the housing in the backlight module of this embodiment, Figure 1 is filled with transparency). Figure 2 is a schematic diagram of the cross-sectional structure along A-A' in Figure 1. Figure 3 is a schematic diagram of the cross-sectional structure along B-B' in Figure 1. Figure 4 is a partially enlarged schematic diagram of the position of the first side panel after the backlight module and the display panel are assembled in this embodiment. The backlight module 000 provided in this embodiment includes a housing 10, a light source 20 and a plurality of optical films 30 (not shown in Figure 1, and not filled in Figures 2 and 3). The housing 10 forms a space to accommodate the light source 20 and the plurality of optical films 30.

[0044] The housing 10 includes a connected back plate 101 and a side plate 102. The extension direction of the back plate 101 is parallel to the light-emitting surface E of the backlight module 000, and the extension direction of the side plate 102 intersects the light-emitting surface E of the backlight module 000.

[0045] The side panel 102 includes at least a first side panel 102A. In the direction Z perpendicular to the light-emitting surface E of the backlight module 000, the side of the first side panel 102A away from the back panel 101 includes a stepped structure 102A1. A first edge-binding plate 40 is fixedly provided on the stepped structure 102A1.

[0046] In the direction Z perpendicular to the light-emitting surface E of the backlight module 000, the side of the first edge plate 40 away from the back plate 101 also includes a plurality of first buckles 401. The extension direction of the first buckles 401 is parallel to the light-emitting surface E of the backlight module 000, and the first buckles 401 extend toward the direction close to the first side plate 102A.

[0047] The first side plate 102A has a plurality of first slots 102A2 corresponding to the first buckle 401 on the side away from the back plate 101. The first edge plate 40 is fixed to the first side plate 102A by being snapped into the first slots 102A2 by the first buckle 401.

[0048] Specifically, the backlight module 000 provided in this embodiment includes a housing 10, a light source 20, and multiple optical films 30. The housing 10 is used to form a space to accommodate the light source 20 and multiple optical films 30. Optionally, the light source 20 can be either a direct-lit light source or a side-lit light source, that is, the backlight module 000 provided in this embodiment can be a direct-lit backlight module. The multiple optical films 30 can include diffusers, reflectors, brightness enhancers, etc., and the multiple light sources 20 are arranged in an array to form a surface light source through the cooperation of the optical films 30. The backlight module 000 can also be a side-lit backlight module. The multiple optical films 30 can include a light guide plate 302, a diffuser 303, a reflector 301, a brightness enhancer 304, etc., and the multiple light sources 20 are arranged along a long strip direction, so that the light-emitting surface of the light source 20 faces the side of the light guide plate, and a surface light source is formed through the light guiding effect of the light guide plate. It is understood that this embodiment only takes the backlight module 000 as an example of a side-lit backlight (as shown in Figure 1). This embodiment does not elaborate on the specific arrangement structure of the light source 20 and the optical film 30. In specific implementation, the structure of direct-lit backlight and side-lit backlight in related technologies can be referred to for arrangement.

[0049] The housing 10 of this embodiment includes a connected back plate 101 and a side plate 102. Optionally, the back plate 101 and the side plate 102 can be integrally formed from the same material in the same process to form the housing 10. The extension direction of the back plate 101 is parallel to the light-emitting surface E of the backlight module 000. The back plate 101 serves as a support for various structures of the backlight module 000, allowing structures such as the light source 20 and the optical film 30 to be placed on the back plate 101. The extension direction of the side plate 102 intersects with the light-emitting surface E of the backlight module 000. Optionally, as shown in Figures 2 and 3, this embodiment uses the example of the extension direction of the side plate 102 being perpendicular to the light-emitting surface E of the backlight module 000 for illustration. While the side plate 102 serves to enclose structures such as the light source 20 and the optical film 30 within the range of the back plate 101, the side plate 102 can also be used as a support for the display panel, ensuring good support performance of the housing 10 for the display panel.

[0050] In this embodiment, the side panel 102 includes at least a first side panel 102A. Optionally, as shown in FIG1, when the back panel 101 is square, the number of first side panels 102A can be four, each surrounding the square back panel 101 and integrally formed with the back panel 101 to form the shell 10. Alternatively, the number of first side panels 102A can be less than four, such as three (not shown in the figure). That is, in this embodiment, the side panels 102 surrounding the back panel 101 on all four sides may not all be of the first side panel 102A structure, or they may all be of the first side panel 102A structure. This embodiment does not specifically limit this, and in specific implementation, the configuration can be selected according to the actual design requirements of the shell 10. It should be noted that the back panel 101 in this embodiment can also be of other shapes, and the side panels 102 only need to satisfy the requirement of forming an accommodating space around the back panel 101.

[0051] As shown in Figures 2 and 3, in the direction Z perpendicular to the light-emitting surface E of the backlight module 000, the side of the first side plate 102A away from the back plate 101 includes a stepped structure 102A1. The stepped structure 102A1 is used to fix the first edge plate 40. Optionally, the first edge plate 40 can be an L-shaped plate as shown in Figures 2 and 3, so that the shape of the first edge plate 40 matches the shape of the stepped structure 102A1 of the first side plate 102A, and the first edge plate 40 can be placed more stably on the stepped structure 102A1.

[0052] As shown in Figures 2 and 4, the L-shaped structure of the first edge plate 40 can be used to place the edge portion of the display panel 001. That is, the stepped structure 102A1 of the first side plate 102A is combined with the first edge plate 40 to jointly support the weight of the display panel 001. The edge portion of the display panel 001 can be matched with the shape of the first edge plate 40 and is firmly placed on the first edge plate 40 by cushioning and fixing materials such as foam double-sided tape. In the direction Z perpendicular to the light-emitting surface E of the backlight module 000, the side of the first edge plate 40 away from the back plate 101 also includes a plurality of first buckles 401. Optionally, the first buckles 401 can be integrally formed with the first edge plate 40 of the same material, which is beneficial to improving process efficiency. The extension direction of the first buckles 401 is parallel to the light-emitting surface E of the backlight module 000, and the first buckles 401 extend toward the direction close to the first side plate 102A. The side of the first side plate 102A away from the back plate 101 is provided with a plurality of first slots 102A2 corresponding to the first buckles 401. The surface of the side of the first side plate 102A away from the back plate 101 is recessed toward the direction close to the back plate 101 to form the first slots 102A2. The first edge plate 40 is fixed to the first side plate 102A by the first buckles 401 being snapped into the first slots 102A2.

[0053] It should be noted that Figure 1 in this embodiment is only an example of the number of first buckles 401 and their corresponding first slots 102A2, but does not represent the actual number. In specific implementation, the number of first buckles 401 can be designed according to the actual size of the backlight module 000. Optionally, multiple first buckles 401 can be evenly arranged around the back plate 101. That is, among the multiple first buckles 401 around the back plate 101, the distance between any two adjacent first buckles 401 can be set to be equal, which is beneficial to balancing the fixing effect of the first edge plate 40 and the first side plate 102A.

[0054] In this embodiment, the first edge-covering plate 40 is placed on the stepped structure 102A1 of the first side plate 102A of the housing 10. The stepped structure 102A1 and the first edge-covering plate 40 jointly support the weight of the display panel 001. While ensuring the supporting effect of the stepped structure 102A1, the bezel of the backlight module 000 is designed to be narrower by limiting the width of the stepped structure 102A1 in the direction parallel to the light-emitting surface E of the backlight module 000. This is conducive to promoting the further development of narrow bezels in display devices using this backlight module 000. In addition, this embodiment also provides the first edge-covering plate 40. The first buckle 401 is engaged in the first slot 102A2 of the first side plate 102A to fix the first edge plate 40 to the first side plate 102A. The engagement of the first buckle 401 in the first slot 102A2 can improve the load-bearing capacity and strength of the first edge plate 40. In the direction Z perpendicular to the light-emitting surface E of the backlight module 000, it prevents the first edge plate 40 from collapsing under the pressure of the weight of the display panel 001 after the display panel 001 is assembled, thus preventing damage to the optical film 30. This helps to improve the overall stability of the backlight module 000 and ensure the display effect.

[0055] It is understood that the backlight module 000 of this embodiment includes, but is not limited to, the structure described above. It may also include other structures that enable the backlight module 000 to provide backlight to the display panel 001, such as light-shielding adhesive. These will not be described in detail here. For specific understanding, please refer to the structure of the backlight module in the related art.

[0056] Optionally, in this embodiment, the housing 10 is made of cast aluminum, which can be formed from aluminum alloy. The first edge plate 40 is made of sheet metal, which helps to improve the flatness of the first edge plate 40. In this embodiment, the housing 10 of the backlight module 000 is made of cast aluminum, which can be formed from aluminum alloy. The first edge plate 40 is made of sheet metal, which ensures high support strength while also facilitating heat dissipation and molding.

[0057] In some alternative embodiments, please refer to Figures 1, 4, and 5. Figure 5 is a schematic diagram of another cross-sectional structure along A-A' in Figure 1. In this embodiment, the stepped structure 102A1 of the first side plate 102A includes a first platform 102A11 and a second side wall 102A12. The first platform 102A11 is parallel to the light-emitting surface E of the backlight module 000, and the second side wall 102A12 intersects with the light-emitting surface E of the backlight module 000. Optionally, this embodiment is illustrated by taking the example that the second side wall 102A12 is perpendicular to the light-emitting surface E of the backlight module 000.

[0058] The first edge-covering plate 40 includes a first support plate 40A and a first fixing plate 40B that are intersected. The first support plate 40A is parallel to the light-emitting surface E of the backlight module 000 and extends in a direction away from the first side plate 102A. The first fixing plate 40B intersects with the light-emitting surface E of the backlight module 000. Optionally, this embodiment takes the example of the first fixing plate 40B being perpendicular to the light-emitting surface E of the backlight module 000 for illustration.

[0059] In the direction Z perpendicular to the light-emitting surface E of the backlight module 000, the first buckle 401 is disposed on the side of the first fixing plate 40B away from the back plate 101;

[0060] The first fixing plate 40B is snapped into and fixed to the second side wall 102A12, and the first support plate 40A is attached to and fixed to the first tabletop 102A11.

[0061] This embodiment explains that the first edge plate 40 can be an L-shaped structure formed by the first support plate 40A and the first fixing plate 40B intersecting each other. In this case, in the direction Z perpendicular to the light-emitting surface E of the backlight module 000, the first buckle 401 is disposed on the side of the first fixing plate 40B away from the back plate 101, so that the first buckle 401 can be snapped and fixed with the first slot 102A2 of the first side plate 102A on the side of the first fixing plate 40B away from the back plate 101. Alternatively, by placing the first support plate 40A on the first platform 102A11 of the stepped structure 102A1, the first fixing plate 40B can be attached to the second side wall 102A12, so that the first edge plate 40 can be fixedly positioned on the stepped structure 102A1 of the first side plate 102.

[0062] Optionally, referring to Figures 1, 4, and 5, this embodiment further includes a first fixing plate 40B that is snapped into and fixed to the second side wall 102A12. The first fixing plate 40B has multiple protrusions 40B1 on the side facing the second side wall 102A12, and the second side wall 102A12 has multiple grooves 102A121 corresponding to the protrusions 40B1. The first fixing plate 40B is fixed to the first side plate 102A by snapping the protrusions 40B1 into the grooves 102A121. This allows the first edge plate 40 to be fixedly mounted on the stepped structure 102A1 while simultaneously being snapped into the grooves 102A121 by the protrusions 40B1, further enhancing the fixing effect between the first edge plate 40 and the first side plate 102A. This further improves the support strength of the first edge plate 40 after assembling the display panel 001.

[0063] Optionally, referring to Figures 1, 4, and 5, this embodiment further provides that the first support plate 40A is bonded and fixed to the first tabletop 102A11. A thin and adhesive structure such as double-sided tape AT1 can be provided between the first support plate 40A and the first tabletop 102A11 to achieve fixed bonding. This can ensure flatness and firmness of the bonding while avoiding increasing the thickness of the overall module.

[0064] Optionally, please refer to Figures 1, 4, and 6. Figure 6 is a schematic diagram of another cross-sectional structure along line A-A' in Figure 1. In this embodiment, the first fixing plate 40B is engaged and fixed to the second sidewall 102A12. Multiple protrusions 40B1 are provided on the side of the first fixing plate 40B facing the second sidewall 102A12. The second sidewall 102A12 is provided with multiple grooves 102A121 corresponding to the protrusions 40B1. The first fixing plate 40B is engaged in the grooves by the protrusions 40B1. The protrusion 40B1 is fixed to the first side plate 102A within 102A121. The protrusion 40B1 can extend obliquely, that is, the included angle α between the protrusion 40B1 and the first fixing plate 40B can be an acute angle. This allows the protrusion 40B1 to be embedded in the matching groove 102A121 in a similar inverted nail shape, which in turn helps to further enhance the embedding and fixing effect between the second side wall 102A12 and the first fixing plate 40B, thereby helping to ensure the stability of the first edge plate 40 and the first side plate 102A.

[0065] In some alternative embodiments, please continue to refer to Figures 1, 4 and 5. In this embodiment, in the direction parallel to the light-emitting surface E of the backlight module 000, the width W1 of the first platform 102A11 is greater than or equal to 1.3 mm, and in the direction Z perpendicular to the light-emitting surface E of the backlight module 000, the height H1 of the second sidewall 102A12 is greater than or equal to 3 mm.

[0066] This embodiment explains that in the stepped structure 102A1 of the first side plate 102A, in the direction parallel to the light-emitting surface E of the backlight module 000, the width W1 of the first platform 102A11 is greater than or equal to 1.3mm. This width can effectively support the first edge plate 40, avoiding the situation where the width W1 of the first platform 102A11 is too narrow, which would cause the first edge plate 40 to easily fall off the stepped structure 102A1, thereby improving the stability of the first edge plate 40. Furthermore, in this embodiment, the height H1 of the second sidewall 102A12 in the direction Z perpendicular to the light-emitting surface E of the backlight module 000 is greater than or equal to 3mm. This ensures that the second sidewall 102A12 has sufficient height in the direction Z perpendicular to the light-emitting surface E of the backlight module 000 to provide a groove 102A121 for engaging the protrusion 40B1. Optionally, the height H2 of the groove 102A121 in the direction Z perpendicular to the light-emitting surface E of the backlight module 000 is generally greater than or equal to 1.3mm. This ensures that the height of the protrusion 40B1 is sufficient to achieve the effect of engaging within the groove 102A121, while also preventing the second sidewall 102A12 from being too small, which could easily result in insufficient thickness space when the display panel 001 is assembled on the first edge plate 40. This achieves a better overall module assembly effect.

[0067] In some alternative embodiments, please refer to Figures 1, 7, 8 and 9. Figure 7 is an enlarged view of one structure of region C in Figure 1, Figure 8 is an enlarged view of another structure of region C in Figure 1, and Figure 9 is an enlarged view of another structure of region C in Figure 1. In this embodiment, the shape of the orthographic projection of the first buckle 401 onto the plane where the back plate 101 is located includes either a straight line or a T-shape.

[0068] This embodiment explains that the first buckle 401 of the first edge plate 40 is engaged in the first slot 102A2 of the first side plate 102A, which can fix the first edge plate 40 to the first side plate 102A, improve the load-bearing capacity and strength of the first edge plate 40, and prevent the first edge plate 40 from collapsing due to the pressure generated by the weight of the display panel 001 after the display panel 001 is assembled, thus preventing damage to the optical film 30. Furthermore, the first buckle 401 is designed with a shape that covers the orthographic projection of its projection onto the plane of the back plate 101. The first buckle 401 can be either a straight line (as shown in Figure 7) or a T-shape (as shown in Figure 9). The orthographic projection of the first buckle 401 onto the plane of the back plate 101 is a straight line as shown in Figure 7, or it can also be a slanted straight line as shown in Figure 8. This simplifies the manufacturing process of the first buckle 401. The orthographic projection of the first buckle 401 onto the plane of the back plate 101 is a T-shape as shown in Figure 9. The two ear-like protrusions of the T-shape can better hook into the first slot 102A2, which helps to further improve the connection between the first edge plate 40 and the first side plate 102A.

[0069] In some alternative embodiments, please refer to Figures 1, 4 and 10. Figure 10 is a schematic diagram of another cross-sectional structure along A-A' in Figure 1, in which a first double-sided adhesive tape AT2 is provided between the first buckle 401 and the first slot 102A2.

[0070] This embodiment explains that the first buckle 401 of the first edge banding plate 40 is embedded in the first slot 102A2 of the first side plate 102A, which can fix the first edge banding plate 40 to the first side plate 102A, improve the load-bearing capacity and strength of the first edge banding plate 40, and at the same time, a first double-sided adhesive AT2 can be set between the first buckle 401 and the first slot 102A2. The first double-sided adhesive AT2, which is thin and sticky, is attached between the first buckle 401 and the first slot 102A2, which helps to further enhance the firmness between the first buckle 401 and the first side plate 102A.

[0071] In some alternative embodiments, please refer to Figures 4, 10, 11, 12, and 13. Figure 11 is a schematic diagram of another planar structure of the backlight module provided in this embodiment of the invention (it is understood that Figure 11 is filled with transparency in order to clearly illustrate the structure of the housing in the backlight module of this embodiment). Figure 12 is a schematic diagram of the cross-sectional structure along the D-D' direction in Figure 11. Figure 13 is a partially enlarged schematic diagram of the position of the second side plate after the backlight module and the display panel are assembled in this embodiment. The side plate 102 of the backlight module 000 provided in this embodiment also includes a second side plate 102B.

[0072] On the direction Z perpendicular to the light-emitting surface E of the backlight module 000, a second edge plate 50 is fixedly provided on the side of the second side plate 102B away from the back plate 101.

[0073] This embodiment explains that the side panel 102, which is integrally formed with the back panel 101, may include the first side panel 102A in the above embodiment, and may also include the second side panel 102B. Optionally, the backlight module 000 in this embodiment can be a side-lit backlight, as shown in FIG11. Multiple light sources 20 arranged in the same direction can be set at the position of the second side panel 102B, so that the remaining first side panels 102A of the housing 10 do not need to consider the bezel width occupied by the light sources 20. It is only necessary to ensure that the first edge plate 40 has sufficient support for the display panel, while minimizing the width of the stepped structure 102A1 of the first side panel 102A, so that at least the first side panel 102A of the housing 10 achieves a narrow bezel effect. The backlight module 000 of this embodiment includes a second side plate 102B. The first side plate 102A, the second side plate 102B, and the back plate 101 can be integrally formed from the same material (it is understood that the different patterns used in the figure are only to distinguish the first side plate 102A and the second side plate 102B; in actual design, the first side plate 102A, the second side plate 102B, and the back plate 101 are made of the same material). In the direction Z perpendicular to the light-emitting surface E of the backlight module 000, a second edge plate 50 is fixedly provided on the side of the second side plate 102B away from the back plate 101. Optionally, the second edge plate 50 can be a structure that covers the end of the second side plate 102B away from the back plate 101. Thus, the structure of the second edge plate 50 can support the display panel 001, avoid pressure damage to the optical film 30 after assembly, and provide sufficient space at the position of the second side plate 102B to place the light source 20 and the flexible circuit board (not shown in the figure) that drives the light source 20 to emit light.

[0074] Optionally, referring to Figures 4, 10, 11, 12, and 13, the backlight module 000 in this embodiment can be a side-lit backlight. The optical film 30 includes at least a light guide plate 302. In the direction parallel to the light-emitting surface E of the backlight module 000, the light source 20 is located on one side of the light guide plate 302, and the light-emitting surface 20E of the light source 20 faces the light guide plate 302. The second side plate 102B is opposite to the position of the light source 20. The optical film 30 may also include a diffuser 303, a reflector 301, a brightness enhancement film 304, etc. Multiple light sources 20 are arranged along a long strip direction, so that the light-emitting surface of the light source 20 faces the side of the light guide plate 302, and a surface light source is formed by the light guiding effect of the light guide plate 302.

[0075] The second side panel 102B in this embodiment includes a first sub-side panel 102B1 and a second sub-side panel 102B2. As shown in FIG12, in the direction parallel to the light-emitting surface E of the backlight module 000, the second sub-side panel 102B2 is located on the side of the first sub-side panel 102B1 away from the light source 20.

[0076] The second edge plate 50 includes a second support plate 50A and a second fixing plate 50B that are intersected. The second support plate 50A is parallel to the light-emitting surface E of the backlight module 000 and extends in a direction away from the second sub-side plate 102B2. The second fixing plate 50B intersects with the light-emitting surface E of the backlight module 000. Optionally, this embodiment takes the example of the second fixing plate 50B being perpendicular to the light-emitting surface E of the backlight module 000 for illustration.

[0077] The second fixing plate 50B is located between the first sub-side plate 102B1 and the second sub-side plate 102B2, and the second fixing plate 50B is snapped and fixed to the first sub-side plate 102B1.

[0078] The second support plate 50A is attached and fixed to the side of the first sub-side plate 102B1 away from the back plate 101.

[0079] This embodiment explains that the second side plate 102B located on one side of the side-lit light source may include a first sub-side plate 102B1 and a second sub-side plate 102B2. In a direction parallel to the light-emitting surface E of the backlight module 000, the first sub-side plate 102B1 and the second sub-side plate 102B2 are connected to each other to form the second side plate 102B, and the second sub-side plate 102B2 is located on the side of the first sub-side plate 102B2 away from the light source 20. The second edge-covering plate 50 can be an inverted L-shaped structure formed by intersecting second support plates 50A and second fixing plates 50B. The second support plate 50A is located on the side of the first sub-side plate 102B1 away from the back plate 101, and the second fixing plate 50B is located between the first sub-side plate 102B1 and the second sub-side plate 102B2. The second support plate 50A is attached and fixed to the side of the first sub-side plate 102B1 away from the back plate 101, and the second fixing plate 50B is snapped and fixed to the first sub-side plate 102B1, thereby realizing the fixed connection between the second edge-covering plate 50 and the second side plate 102B. The side of the second support plate 50A away from the back plate 101 can be used to support the display panel 001, so the stability of the second edge-covering plate 50 can be ensured by setting the width of the second support plate 50A.

[0080] In some alternative embodiments, please refer to Figures 11, 13, and 14. Figure 14 is a cross-sectional view of the structure along D-D' in Figure 11. In this embodiment, the second fixing plate 50B has multiple second slots 50B1, and the first sub-side plate 102B1 has multiple second buckles 102B11 corresponding to the second slots 50B1. The first sub-side plate 102B1 is fixed to the second fixing plate 50B by being snapped into the second slots 50B1 by the second buckles 102B11.

[0081] This embodiment explains the engagement and fixation of the second fixing plate 50B with the first sub-side plate 102B1. The second fixing plate 50B has multiple second slots 50B1, which can be holes penetrating the thickness of the second fixing plate 50B. The first sub-side plate 102B1 has multiple second buckles 102B11 corresponding to the second slots 50B1. The second buckles 102B11 can be protruding structures. The first sub-side plate 102B1 is engaged by the second buckles 102B11. The second fixing plate 50B is fixed in the second slot 50B1, so that the second fixing plate 50B of the second edge plate 50 can be fixedly set between the first sub-side plate 102B1 and the second sub-side plate 102B2. At the same time, the second buckle 102B11 can be snapped into the second slot 50B1, further enhancing the fixing effect between the second edge plate 50 and the second side plate 102B. This allows the support strength of the second edge plate 50 to be further improved after the display panel 001 is assembled.

[0082] Optionally, please refer to Figures 11, 13, and 15. Figure 15 is a cross-sectional view of the structure along D-D' in Figure 11. In this embodiment, the second support plate 50A is further fixed to the side of the first sub-side plate 102B1 away from the back plate 101. A thin and adhesive structure such as double-sided tape AT3 can be used between the ends of the second support plate 50A and the side of the first sub-side plate 102B1 away from the back plate 101 to achieve fixed bonding. This can ensure flatness and firmness of the bonding while avoiding increasing the thickness of the overall module.

[0083] In some alternative embodiments, please refer to Figures 16, 17 and 18. Figure 16 is a schematic diagram of another planar structure of the backlight module provided in this embodiment of the invention (it is understood that Figure 16 is filled with transparency in order to clearly illustrate the structure of the housing in the backlight module of this embodiment). Figure 17 is a schematic diagram of the cross-sectional structure along F-F' in Figure 16. Figure 18 is a schematic diagram of the cross-sectional structure along G-G' in Figure 16. In this embodiment, in the direction Z perpendicular to the light-emitting surface E of the backlight module 000, the side of the second fixing plate 50B away from the back plate 101 also includes a plurality of third buckles 501. The extension direction of the third buckles 501 is parallel to the light-emitting surface E of the backlight module 000, and the third buckles 501 extend in a direction away from the first sub-side plate 102B1.

[0084] The second sub-side plate 102B2 has multiple third slots 102B2 corresponding to the third buckle 501 on the side away from the back plate 101. The second fixing plate 50B is fixed to the second sub-side plate 102B2 by being snapped into the third slot 102B21 by the third buckle 501.

[0085] This embodiment explains that in the direction Z perpendicular to the light-emitting surface E of the backlight module 000, the side of the second fixing plate 50B away from the back plate 101 also includes multiple third buckles 501. Optionally, the third buckles 501 can be integrally formed with the second edge plate 50 of the same material, which is beneficial to improving process efficiency. The extension direction of the third buckles 501 is parallel to the light-emitting surface E of the backlight module 000, and the third buckles 501 extend in a direction away from the first sub-side plate 102B1. The side of the second sub-side plate 102B2 away from the back plate 101 is provided with multiple third slots 102B21 corresponding to the third buckles 501. The surface of the side of the second sub-side plate 102B2 away from the back plate 101 is recessed in a direction close to the back plate 101 to form the third slots 102B21. The second fixing plate 50B of the second edge plate 50 is fixed to the second sub-side plate 102B2 by being snapped into the third slots 102B21 by the third buckles 501.

[0086] It should be noted that Figure 16 in this embodiment is only an example of the number of third buckles 501 and their corresponding third slots 102B21, but does not represent the actual number. In specific implementation, the number of third buckles 501 can be designed according to the actual size of the backlight module 000. Optionally, multiple third buckles 501 can be evenly arranged at the position of the second side plate 102B, that is, the distance between any two adjacent third buckles 501 can be set to be equal, which is beneficial to balancing the fixing effect of the second edge plate 50 and the second side plate 102B.

[0087] In some alternative embodiments, please refer to Figures 16, 19 and 20. Figure 19 is an enlarged view of one structure of region I in Figure 16, and Figure 20 is an enlarged view of another structure of region I in Figure 16. In this embodiment, the shape of the orthographic projection of the third buckle 501 onto the plane where the back plate 101 is located includes either a straight line or a T-shape.

[0088] This embodiment explains that the third buckle 501 of the second edge plate 50 is engaged in the third slot 102B21 of the second sub-side plate 102B2, which can fix the second edge plate 50 to the second side plate 102B, improve the load-bearing capacity and strength of the second edge plate 50, and prevent the second edge plate 50 from collapsing due to the pressure generated by the weight of the display panel 001 after the display panel 001 is assembled, thus preventing damage to the optical film 30. Furthermore, the third buckle 501 is also provided with a projection of its orthographic projection onto the plane of the back plate 101. The shape can be either straight (as shown in Figure 19) or T-shaped (as shown in Figure 20). The shape of the third buckle 501 projected onto the plane of the back plate 101 is straight as shown in Figure 19, which can simplify the manufacturing process of the third buckle 501 and the second edge plate 50 being integrally formed. The shape of the third buckle 501 projected onto the plane of the back plate 101 is T-shaped as shown in Figure 20. The two ear-like protrusions of the T-shape can better hook into the third slot 102B21, which is conducive to further improving the connection between the second edge plate 50 and the second side plate 102B.

[0089] In some alternative embodiments, please refer to Figures 16 and 21. Figure 21 is a schematic diagram of another cross-sectional structure along the F-F' direction in Figure 16, in which a second double-sided adhesive AT4 is provided between the third buckle 501 and the third slot 102B21.

[0090] This embodiment explains that the third buckle 501 of the second edge banding plate 50 is embedded in the third slot 102B21 of the second sub-side plate 102B2, which can fix the second edge banding plate 50 to the second side plate 102B, improve the load-bearing capacity and strength of the second edge banding plate 50, and at the same time, a second double-sided adhesive AT4 can be set between the third buckle 501 and the third slot 102B21. The second double-sided adhesive AT4, which is thin and sticky, is attached between the third buckle 501 and the third slot 102B21, which helps to further enhance the firmness between the third buckle 501 and the second sub-side plate 102B2.

[0091] In some alternative embodiments, please continue to refer to Figures 11 and 12. In this embodiment, in the direction parallel to the light-emitting surface E of the backlight module 000, along the direction from the first sub-side plate 102B1 to the second sub-side plate 102B2, the width W2 of the first sub-side plate 102B1 is greater than or equal to 1.5mm.

[0092] This embodiment explains that in the second side plate 102B, the first sub-side plate 102B1, which serves to support the second edge plate 50, can be designed such that, in a direction parallel to the light-emitting surface E of the backlight module 000, the first sub-side plate 102B1 points towards the second sub-side plate 102B2. The width W2 of the first sub-side plate 102B1 is greater than or equal to 1.5mm, thereby allowing the first sub-side plate 102B1 supporting the second edge plate 50 to have a larger width. This width can effectively support the second edge plate 50, avoiding the first sub-side plate 102B1 being too narrow, which would cause damage to the first sub-side plate 102B1 when the second edge plate 40 is pressed down, thus affecting the stability of the module.

[0093] In some optional embodiments, please refer to Figures 1-4 and 22. Figure 22 is a schematic planar structure diagram of a display device provided in an embodiment of the present invention. The display device 111 provided in this embodiment includes the backlight module 000 provided in the above embodiments of the present invention. The embodiment in Figure 22 only uses a mobile phone as an example to illustrate the display device 111. It can be understood that the display device 111 provided in the embodiments of the present invention can be other display devices 111 with display functions, such as computers, televisions, and vehicle display devices. The present invention does not impose specific limitations on this. Optionally, as shown in Figures 22 and 23, Figure 23 is a schematic cross-sectional structure diagram along J-J' in Figure 22. The display device 000 in this embodiment includes a display panel 001 and the backlight module 000 in the above embodiments, which are arranged opposite to each other. The display panel 001 is located on one side of the light-emitting surface E of the backlight module 000; the display panel 001 is disposed on the first edge plate 40. Optionally, when the side panel 102 further includes a second side panel 102B, the first edge-mounting plate 40 and the second edge-mounting plate 50 are used to jointly support the display panel 001 (not shown in the accompanying drawings, but can be understood in conjunction with the embodiments shown in Figures 11-13). The display device 111 provided in this embodiment of the invention has the beneficial effects of the backlight module 000 provided in this embodiment of the invention. For details, please refer to the specific descriptions of the backlight module 000 in the above embodiments, which will not be repeated here.

[0094] In some alternative embodiments, please refer to Figures 22 and 24. Figure 24 is a schematic diagram of another cross-sectional structure along the J-J' direction in Figure 22, in which a first buffer pad 60 is provided between the display panel 001 and the first edge plate 40.

[0095] This embodiment explains that when the backlight module 000 and the display panel 001 are assembled, the display panel 001 is disposed on the first edge-mounting plate 40, and a first buffer pad 60 is disposed between the display panel 001 and the first edge-mounting plate 40. The first buffer pad 60 can be double-sided foam adhesive, which is not only relatively soft and serves to buffer the glass substrate of the display panel 001, preventing uneven display brightness (mura-type) caused by stress on the edge of the glass substrate of the display panel 001, but also serves to fix the display panel 001 and the first edge-mounting plate 40. Optionally, when the side plate 102 also includes a second side plate 102B, the first edge-mounting plate 40 and the second edge-mounting plate 50 are used to jointly support the display panel 001, and the buffer pad (not shown in the figure) can also be disposed between the display panel 001 and the second edge-mounting plate 50. For details, please refer to the embodiments shown in Figures 11-13 for understanding, which will not be elaborated here.

[0096] As can be seen from the above embodiments, the backlight module and display device provided by the present invention achieve at least the following beneficial effects:

[0097] The backlight module housing provided by this invention includes a connected back plate and side plates. The extension direction of the back plate is parallel to the light-emitting surface of the backlight module. The back plate serves as a support for various structures of the backlight module, allowing structures such as light sources and optical films to be placed on it. The extension direction of the side plates intersects with the light-emitting surface of the backlight module. The side plates enclose the light sources, optical films, and other structures within the area of ​​the back plate, and also serve as a support for the display panel, ensuring good support performance of the housing for the display panel. The side plates include at least a first side plate. In the direction perpendicular to the light-emitting surface of the backlight module, the side of the first side plate away from the back plate includes a stepped structure. The stepped structure is used to fix a first edge plate. By having the stepped structure and the first edge plate jointly support the weight of the display panel, the backlight module's bezel can be designed to be narrower by limiting the width of the stepped structure in the direction parallel to the light-emitting surface of the backlight module, while ensuring the support effect of the stepped structure. This facilitates the further development of narrow bezels in display devices using this backlight module. Furthermore, the present invention also provides a first buckle of the first edge plate that is embedded in the first slot of the first side plate to fix the first edge plate to the first side plate. The first buckle being embedded in the first slot can improve the load-bearing capacity and strength of the first edge plate. In the direction perpendicular to the light-emitting surface of the backlight module, it prevents the first edge plate from collapsing under the pressure of the weight of the display panel after the display panel is assembled, thus preventing damage to the optical film. This helps to improve the firmness of the entire backlight module and ensure the display effect.

[0098] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A backlight module, characterized in that, The device includes a housing, a light source, and multiple optical films. The housing forms a space to accommodate the light source and the optical films. The housing includes a connected back plate and side plates. The extension direction of the back plate is parallel to the light-emitting surface of the backlight module, and the extension direction of the side plates intersects the light-emitting surface of the backlight module. The side plates include at least a first side plate. In a direction perpendicular to the light-emitting surface of the backlight module, the side of the first side plate away from the back plate includes a stepped structure, on which a first edge plate is fixedly disposed. In the direction perpendicular to the light-emitting surface of the backlight module, the side of the first edge plate away from the back plate also includes multiple first buckles. The extension direction of the first buckles is parallel to the light-emitting surface of the backlight module, and the first buckles extend towards the first side plate. In the direction perpendicular to the light-emitting surface of the backlight module, the orthographic projection of the first buckles lies within the orthographic projection of the first side plate. The side of the first side plate away from the back plate... The first edge banding plate is provided with multiple first slots corresponding to the first buckle. The first edge banding plate is fixed to the first side plate by being snapped into the first slots through the first buckle. The shape of the first buckle's orthogonal projection onto the plane of the back plate includes either a diagonal straight line or a T-shape. The stepped structure includes a first platform and a second side wall. The first platform is parallel to the light-emitting surface of the backlight module, and the second side wall intersects with the light-emitting surface of the backlight module. The first edge banding plate includes a first support plate and a first fixing plate that intersect. The first support plate is parallel to the light-emitting surface of the backlight module and extends away from the first side plate. The first fixing plate intersects with the light-emitting surface of the backlight module. The first fixing plate has multiple protrusions on the side facing the second side wall, and the second side wall has multiple grooves corresponding to the protrusions. The first fixing plate is fixed to the first side plate by being snapped into the grooves through the protrusions.

2. The backlight module according to claim 1, characterized in that, In the direction parallel to the light-emitting surface of the backlight module, the width of the first platform is greater than or equal to 1.3 mm.

3. The backlight module according to claim 1, characterized in that, A first double-sided adhesive is provided between the first buckle and the first slot, and / or a double-sided adhesive is provided between the first table surface and the first support plate.

4. The backlight module according to claim 1, characterized in that, At least one side of the protrusion is a bevel, and the angle between the bevel of the protrusion and the first fixing plate is an acute angle.

5. The backlight module according to claim 1, characterized in that, The side panel also includes a second side panel; in a direction perpendicular to the light-emitting surface of the backlight module, a second edge-covering plate is fixedly provided on the side of the second side panel away from the back panel.

6. The backlight module according to claim 5, characterized in that, The optical film includes at least a light guide plate. In a direction parallel to the light-emitting surface of the backlight module, the light source is located on one side of the light guide plate, with the light-emitting surface of the light source facing the light guide plate. The second side plate is positioned opposite the light source. The second side plate includes a first sub-side plate and a second sub-side plate. In a direction parallel to the light-emitting surface of the backlight module, the second sub-side plate is located on the side of the first sub-side plate away from the light source. The second edge plate includes a second support plate and a second fixing plate that intersect. The second support plate is parallel to the light-emitting surface of the backlight module and extends in a direction away from the second sub-side plate. The second fixing plate intersects with the light-emitting surface of the backlight module. The second fixing plate is located between the first sub-side plate and the second sub-side plate, and is snap-fitted to the first sub-side plate. The second support plate is adhered and fixed to the side of the first sub-side plate away from the back plate.

7. The backlight module according to claim 6, characterized in that, The second fixing plate has multiple second slots, and the first sub-side plate has multiple second buckles corresponding to the second slots. The first sub-side plate is fixed to the second fixing plate by being snapped into the second slots by the second buckles.

8. The backlight module according to claim 6, characterized in that, In a direction perpendicular to the light-emitting surface of the backlight module, the second fixing plate further includes a plurality of third buckles on the side away from the back plate. The extension direction of the third buckles is parallel to the light-emitting surface of the backlight module, and the third buckles extend in a direction away from the first sub-side plate. The second sub-side plate has a plurality of third slots corresponding to the third buckles on the side away from the back plate. The second fixing plate is fixed to the second sub-side plate by being snapped into the third slots by the third buckles.

9. The backlight module according to claim 8, characterized in that, The shape of the orthographic projection of the third buckle onto the plane of the back plate includes either a straight line or a T-shape.

10. The backlight module according to claim 8, characterized in that, A second double-sided adhesive is provided between the third buckle and the third slot, and / or a double-sided adhesive is provided between the second support plate and the first sub-side plate.

11. The backlight module according to claim 6, characterized in that, In a direction parallel to the light-emitting surface of the backlight module, along the direction from the first sub-side plate to the second sub-side plate, the width of the first sub-side plate is greater than or equal to 1.5 mm.

12. A display device, characterized in that, The device includes a display panel and a backlight module as described in any one of claims 1-11, wherein the display panel is located on one side of the light-emitting surface of the backlight module; the display panel is disposed on the first edge-mounting plate.

13. The display device according to claim 12, characterized in that, A first buffer pad is provided between the display panel and the first edge plate.

Images