CN113900302B

CN113900302B - Backlight module and display device

Info

Publication number: CN113900302B
Application number: CN202111165349.7A
Authority: CN
Inventors: 寸敏敏; 曾东龙
Original assignee: Tianma Microelectronics Co Ltd
Current assignee: Tianma Microelectronics Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2023-10-24
Anticipated expiration: 2041-09-30
Also published as: CN117369183A; CN113900302A

Abstract

The invention discloses a backlight module and a display device, which belong to the technical field of display, wherein the backlight module comprises a shell, a light source and a plurality of optical diaphragms, the shell comprises a back plate and side plates which are connected, the side plates at least comprise a first side plate, one side of the first side plate, which is far away from the back plate, comprises a step structure in the direction perpendicular to the light emitting surface of the backlight module, and a first edge covering plate is fixedly arranged on the step structure; on the direction perpendicular to the light-emitting surface of the backlight module, one side, far away from the back plate, of the first edge-covering plate further comprises a plurality of first buckles, one side, far away from the back plate, of the first side plate is provided with a plurality of first clamping grooves corresponding to the first buckles, and the first edge-covering plate is clamped in the first clamping grooves through the first buckles and is fixed with the first side plate. The display device comprises a display panel and the backlight module which are oppositely arranged. The invention can realize narrow frame, improve the firmness of the whole backlight module, avoid the optical film from being crushed and ensure the display effect.

Description

Backlight module and display device

Technical Field

The invention relates to the technical field of display, in particular to a backlight module and a display device.

Background

The liquid crystal display device (Liquid Crystal Display, LCD) has many advantages such as thin body, power saving, no radiation, etc., and has been widely used. Such as liquid crystal televisions, mobile phones, personal digital assistants, digital cameras, computer screens, or notebook computer screens, etc., are dominant in the field of flat panel displays. The liquid crystal display device is a display component adopted by most mobile phone products at present, and the traditional liquid crystal display device is composed of a liquid crystal display screen, a backlight module, a driving circuit and other components. The liquid crystal display screen is a passive light-emitting component, and the backlight module is used for providing a uniform surface light source for the liquid crystal display screen. With the appearance of a narrow-frame mobile terminal, a mobile terminal applying an LCD display screen presents a trend that the frame is narrower and narrower, and accordingly, the frame of a backlight module providing a light source for the LCD display screen needs to be further narrowed to meet the narrow-frame requirement of the mobile terminal.

The shell in the backlight module in the prior art is generally made of middle metal plate materials, and the main function of the middle metal plate is to bear the glass substrate in the display panel, so that the bearing strength is much higher than that of a common rubber frame. With the development of cast aluminum modules and large-size modules, more and more backlight adopting cast aluminum shells is adopted, and a sufficient width space is often not available on the cast aluminum shells to design steps of metal plates in supporting, so that the cast aluminum modules are difficult to develop to a narrow frame, and the optical films in the backlight modules are often damaged by pressure action after the glass substrates of the display panels are assembled or attached, so that the metal plates collapse downwards to cause a film Waving phenomenon (namely film warping, surface unevenness, and ripple state phenomenon) and finally the picture effect of the liquid crystal display device is easily affected.

Therefore, how to provide a backlight module and a display device capable of realizing a narrow frame and improving the bearing strength of the backlight housing and preventing poor display is a technical problem to be solved by those skilled in the art.

Disclosure of Invention

In view of this, the present invention provides a backlight module and a display device, so as to solve the problem in the prior art that in order to achieve a narrow frame, a glass substrate in an assembled display panel is easy to crush an optical film in the backlight module, resulting in poor display.

The invention discloses a backlight module, which comprises a shell, a light source and a plurality of optical diaphragms, wherein the shell forms a space for accommodating the light source and the optical diaphragms; the shell comprises a back plate and a side plate which are connected, the extending direction of the back plate is parallel to the light-emitting surface of the backlight module, and the extending direction of the side plate is intersected with the light-emitting surface of the backlight module; the side plate at least comprises a first side plate, one side of the first side plate, which is far away from the back plate, comprises a step structure in the direction perpendicular to the light emitting surface of the backlight module, and a first edge covering plate is fixedly arranged on the step structure; in the direction perpendicular to the light-emitting surface of the backlight module, one side of the first edge-covering plate, which is far away from the back plate, also comprises a plurality of first buckles, the extending 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; one side of the first side plate, which is far away from the backboard, is provided with a plurality of first clamping grooves corresponding to the first buckles, and the first edge covering plate is clamped in the first clamping grooves through the first buckles and is fixed with the first side plate.

Based on the same inventive concept, the invention also discloses a display device, which comprises a display panel and the backlight module which are oppositely arranged, wherein the display panel is positioned at one side of the light emitting surface of the backlight module; the display panel is arranged on the first edge-covering plate.

Compared with the prior art, the backlight module and the display device provided by the invention have the advantages that at least the following effects are realized:

the shell of the backlight module provided by the invention comprises the connected backboard and the side plate, the extending direction of the backboard is parallel to the light emitting surface of the backlight module, and the backboard is used as a bearing piece of various structures of the backlight module, so that structures such as a light source, an optical diaphragm and the like can be placed on the backboard. The extending direction of the side plate is intersected with the light emitting surface of the backlight module, and the side plate is used for enclosing structures such as a light source, an optical membrane and the like in the range of the back plate and can be used as a bearing piece of the display panel, so that good supporting performance of the shell on the display panel is guaranteed. The side plate at least comprises a first side plate, one side of the first side plate, which is far away from the backboard, comprises a step structure in the direction perpendicular to the light emitting surface of the backlight module, the step structure is used for fixedly arranging a first edge covering plate, the weight of the display panel is borne by the step structure and the first edge covering plate together, the frame design of the backlight module can be narrower by limiting the width of the step structure in the direction parallel to the light emitting surface of the backlight module on the basis of ensuring the supporting effect of the step structure, and further the display device applying the backlight module is further promoted to develop to a narrow frame. The first buckle of the first edge-covering plate is clamped and embedded in the first clamping groove of the first side plate, so that the first edge-covering plate and the first side plate are fixed, the first buckle is clamped and embedded in the first clamping groove, the bearing capacity and strength of the first edge-covering plate can be improved, the phenomenon that the first edge-covering plate is easy to collapse and crush an optical film under the pressure generated by the weight of the display panel after the display panel is assembled in the direction perpendicular to the light-emitting surface of the backlight module is prevented, the firmness of the whole backlight module is further improved, and the display effect is guaranteed.

Of course, it is not necessary for any one product to practice the invention to achieve all of the technical effects described above at the same time.

Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic plan view of a backlight module according to an embodiment of the present invention;

FIG. 2 is a schematic view of the cross-sectional structure in the direction A-A' of FIG. 1;

FIG. 3 is a schematic view of the cross-sectional structure in the direction B-B' in FIG. 1;

fig. 4 is a schematic view of a partially enlarged structure of a first side plate position of the backlight module and the display panel after being assembled according to the present embodiment;

FIG. 5 is a schematic view of another cross-sectional structure in the direction A-A' of FIG. 1;

FIG. 6 is a schematic view of another cross-sectional structure in the direction A-A' of FIG. 1;

FIG. 7 is an enlarged view of the structure of region C of FIG. 1;

FIG. 8 is an enlarged view of another structure of region C of FIG. 1;

FIG. 9 is an enlarged view of another structure of region C of FIG. 1;

FIG. 10 is a schematic view of another cross-sectional structure in the direction A-A' of FIG. 1;

Fig. 11 is a schematic plan view of another backlight module according to an embodiment of the invention;

FIG. 12 is a schematic view of the sectional structure in the direction D-D' in FIG. 11;

fig. 13 is a schematic view of a partially enlarged structure of a second side plate of the backlight module and the display panel after assembly according to the present embodiment;

FIG. 14 is a schematic view showing a cross-sectional structure of the structure D-D' of FIG. 11 toward the other side;

FIG. 15 is a schematic view of the cross-sectional structure of FIG. 11 from D-D' to another;

fig. 16 is a schematic plan view of another backlight module according to an embodiment of the invention;

FIG. 17 is a schematic view of the cross-sectional structure in the F-F' direction of FIG. 16;

FIG. 18 is a schematic view showing a sectional structure in the direction G-G' in FIG. 16;

FIG. 19 is an enlarged view of the structure of region I of FIG. 16;

FIG. 20 is an enlarged view of another structure of region I in FIG. 16;

FIG. 21 is a schematic view of another cross-sectional structure in the direction F-F' in FIG. 16;

fig. 22 is a schematic plan view of a display device according to an embodiment of the present invention;

FIG. 23 is a schematic view of the cross-sectional structure in the J-J' direction of FIG. 22;

FIG. 24 is a schematic view of another cross-sectional structure in the J-J' direction of FIG. 22.

Detailed Description

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

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Referring to fig. 1-4 in combination, fig. 1 is a schematic plan view of a backlight module according to an embodiment of the present invention (it can be understood that, for clarity, the structure of the housing in the backlight module according to the embodiment is illustrated, and the transparent filling is performed in fig. 1), fig. 2 is a schematic sectional view of A-A 'in fig. 1, fig. 3 is a schematic sectional view of B-B' in fig. 1, and fig. 4 is a schematic sectional view of a first side plate position after the backlight module and the display panel are assembled, and fig. 4 is an enlarged partial schematic sectional view of a first side plate position, wherein the backlight module 000 includes a housing 10, a light source 20 and a plurality of optical films 30 (not illustrated in fig. 1, not illustrated in fig. 2 and 3), and the housing 10 forms a space for accommodating the light source 20 and the plurality of optical films 30;

The casing 10 includes a back plate 101 and a side plate 102 connected, the extending direction of the back plate 101 is parallel to the light emitting surface E of the backlight module 000, and the extending direction of the side plate 102 intersects with the light emitting surface E of the backlight module 000;

the side plate 102 comprises at least a first side plate 102A, and in the direction Z perpendicular to the light emitting surface E of the backlight module 000, one side of the first side plate 102A away from the back plate 101 comprises a step structure 102A1, and the step structure 102A1 is fixedly provided with a first edge covering plate 40;

in the direction Z perpendicular to the light-emitting surface E of the backlight module 000, the side of the first edge-covering plate 40 away from the back plate 101 further includes a plurality of first buckles 401, the extending 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 towards 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 clamping grooves 102A2 corresponding to the first clamping buckles 401, and the first edge-covering plate 40 is clamped in the first clamping grooves 102A2 through the first clamping buckles 401 and is fixed with the first side plate 102A.

Specifically, the backlight module 000 provided in this embodiment includes a housing 10, a light source 20, and a plurality of optical films 30, where the housing 10 is used to form a space for accommodating the light source 20 and the plurality of optical films 30, alternatively, the light source 20 may be any one of a direct type light source or a side-in type light source, that is, the backlight module 000 provided in this embodiment may be a direct type backlight module, the plurality of optical films 30 may include a diffusion sheet, a reflection sheet, a brightness enhancing sheet, and the like, and the plurality of light sources 20 are arranged in an array, and form a surface light source through cooperation of the optical films 30; the backlight module 000 may also be a side-in type backlight module, and the optical films 30 may include a light guide plate 302, a diffusion sheet 303, a reflection sheet 301, a brightness enhancement sheet 304, and the like, where the light sources 20 are arranged along a strip direction, so that the light emitting surface of the light source 20 faces the side surface of the light guide plate, and forms a surface light source through the light guiding effect of the light guide plate. It is to be understood that the present embodiment is only illustrated by taking the backlight module 000 as the side-in backlight (as shown in fig. 1), and the specific arrangement structure of the light source 20 and the optical film 30 is not described herein, and the arrangement can be performed with reference to the structures of the direct-type backlight and the side-in backlight in the related art.

The housing 10 of the present embodiment includes a back plate 101 and a side plate 102 connected, alternatively, the back plate 101 and the side plate 102 may be made of the same material and integrally formed into the housing 10 in the same process. The extending direction of the back plate 101 is parallel to the light emitting surface E of the backlight module 000, and the back plate 101 is used as a carrier of various structures of the backlight module 000, so that the structures such as the light source 20, the optical film 30, etc. can be placed on the back plate 101. Optionally, as shown in fig. 2 and 3, the embodiment is illustrated by taking the extending direction of the side plate 102 and the light emitting surface E of the backlight module 000 as an example where the extending direction of the side plate 102 is perpendicular to each other, and the side plate 102 is used to enclose the structures such as the light source 20 and the optical film 30 within the range of the back plate 101, and meanwhile, the side plate 102 can also be used as a carrier of the display panel, so as to ensure good supporting performance of the housing 10 on the display panel.

The side plates 102 of the present embodiment include at least a first side plate 102A, optionally, as shown in fig. 1, when the back plate 101 is square, the number of the first side plates 102A may be 4, and each of the first side plates surrounds the square back plate 101 and is integrally formed with the back plate 101 to form the housing 10. Alternatively, the number of the first side plates 102A may be less than 4, such as 3 (not shown), that is, the side plates 102 surrounding the back plate 101 at four sides in this embodiment may not be the structure of the first side plates 102A, but may also be the structure of the first side plates 102A, which is not particularly limited, and may be selected according to the actual design requirement of the housing 10 when the present embodiment is implemented. The back plate 101 of the present embodiment may have other shapes, and the side plate 102 may be formed around the back plate 101.

As shown in fig. 2 and fig. 3, in the direction Z perpendicular to the light emitting surface E of the backlight module 000, a side of the first side plate 102A away from the back plate 101 includes a step structure 102A1, where the step structure 102A1 is used for fixedly disposing the first edge-covering plate 40, alternatively, the first edge-covering plate 40 may be an L-shaped plate as shown in fig. 2 and fig. 3, so that the shape of the first edge-covering plate 40 is matched with the shape of the step structure 102A1 of the first side plate 102A, and the first edge-covering plate 40 may be relatively firmly disposed on the step structure 102A 1.

As shown in fig. 2 and 4, the L-shaped structure of the first edge-covering plate 40 may be used to place the edge portion of the display panel 001, that is, the step structure 102A1 of the first side plate 102A is combined with the first edge-covering plate 40 to jointly bear the weight of the display panel 001, and the edge portion of the display panel 001 may just match the shape of the first edge-covering plate 40 and be stably placed on the first edge-covering plate 40 by using a buffer fixing material such as a foam double-sided adhesive tape. In the direction Z perpendicular to the light emitting surface E of the backlight module 000, the side of the first edge-covering plate 40 away from the back plate 101 further includes a plurality of first fasteners 401, and optionally, the first fasteners 401 and the first edge-covering plate 40 may be integrally formed with each other, which is beneficial to improving the process efficiency; the extending direction of the first buckle 401 is parallel to the light emitting surface E of the backlight module 000, the first buckle 401 extends towards the direction close to the first side plate 102A, a plurality of first clamping grooves 102A2 corresponding to the first buckle 401 are formed in one side, far away from the back plate 101, of the first side plate 102A, the surface, far away from the back plate 101, of the first side plate 102A is recessed towards the direction close to the back plate 101 to form the first clamping grooves 102A2, and the first edge-covering plate 40 is clamped in the first clamping grooves 102A2 through the first buckle 401 to be fixed with the first side plate 102A.

It should be noted that, fig. 1 of the present embodiment only illustrates the number of the first buckles 401 and the corresponding first card slots 102A2, but does not represent the actual number, and in a specific implementation, the number of the first buckles 401 may be designed according to the actual size of the backlight module 000, alternatively, a plurality of first buckles 401 may be uniformly arranged around the back plate 101, that is, the distance between any two adjacent first buckles 401 may be set to be equal among a plurality of first buckles 401 around the back plate 101, so as to be beneficial to balancing the fixing effect of the first edge-covering plate 40 and the first side plate 102A.

The first edge-covering plate 40 is placed through the step structure 102A1 of the first side plate 102A of the housing 10, and the weight of the display panel 001 is borne by the step structure 102A1 and the first edge-covering plate 40 together, so that on the basis of ensuring the supporting effect of the step structure 102A1, the width of the step structure 102A1 in the direction parallel to the light-emitting surface E of the backlight module 000 is limited to narrow the frame design of the backlight module 000, which is beneficial to promoting the display device applying the backlight module 000 to develop further to the narrow frame, and the first buckle 401 of the first edge-covering plate 40 is also arranged in the first clamping groove 102A2 of the first side plate 102A, so that the first buckle 401 is clamped in the first clamping groove 102A2, the bearing capacity and the strength of the first edge-covering plate 40 can be improved, the first edge-covering plate 40 is prevented from being easily pressed down by the pressure generated by the weight of the display panel 001 after the display panel 001 is assembled in the direction Z perpendicular to the light-emitting surface E of the backlight module 000, the whole display panel is prevented from being easily collapsed, and the whole display panel is further beneficial to be firmly protected, and the display effect of the backlight module 30 is ensured.

It is to be understood that the backlight module 000 of the present embodiment includes, but is not limited to, the above structure, and may further include other structures, such as a light-shielding adhesive, capable of providing backlight for the display panel 001 by the backlight module 000, which is not described herein, and the present embodiment can be specifically understood with reference to the structure of the backlight module in the related art.

Optionally, in this embodiment, the manufacturing material of the housing 10 includes a cast aluminum material, and the cast aluminum material may be formed of an aluminum alloy, and the manufacturing material of the first edge-covering plate 40 includes a metal plate, which helps to improve the flatness of the first edge-covering plate 40. The manufacturing material of the housing 10 of the backlight module 000 of this embodiment includes a cast aluminum material, which may be formed of an aluminum alloy, and the manufacturing material of the first edge-covering plate 40 includes a metal plate, which is beneficial to heat dissipation and molding while ensuring high supporting strength.

In some alternative embodiments, please refer to fig. 1, 4 and 5 in combination, fig. 5 is a schematic cross-sectional view of the direction A-A' in fig. 1, in which the step structure 102A1 of the first side plate 102A includes a first mesa 102A11 and a second side wall 102A12, the first mesa 102A11 is parallel to the light-emitting surface E of the backlight module 000, and the second side wall 102A12 intersects the light-emitting surface E of the backlight module 000; alternatively, in this embodiment, the second side wall 102a12 and the light emitting surface E of the backlight module 000 are perpendicular to each other for illustration;

The first edge-covering plate 40 comprises a first supporting plate 40A and a first fixing plate 40B which are arranged in an intersecting manner, the first supporting plate 40A is parallel to the light-emitting surface E of the backlight module 000, the first supporting plate 40A extends in a direction away from the first side plate 102A, and the first fixing plate 40B is intersected with the light-emitting surface E of the backlight module 000; alternatively, the embodiment is exemplified by the first fixing plate 40B being perpendicular to the light emitting surface E of the backlight module 000;

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

the first fixing plate 40B is clamped and fixed with the second side wall 102a12, and the first supporting plate 40A is attached and fixed with the first table top 102a 11.

The embodiment explains that the first edge-covering plate 40 may be an L-shaped structure formed by the first support plate 40A and the first fixing plate 40B which are disposed in an intersecting manner, at this time, in the direction Z perpendicular to the light-emitting surface E of the backlight module 000, the first buckle 401 is disposed on a side of the first fixing plate 40B away from the back plate 101, so that the first buckle 401 may be fastened and fixed with the first fastening groove 102A2 of the first side plate 102A on a side of the first fixing plate 40B away from the back plate 101, and may also be attached to the second side wall 102A12 by placing the first support plate 40A on the first table top 102A11 of the step structure 102A1, so that the first edge-covering plate 40 may be just fastened on the step structure 102A1 of the first side plate 102.

Optionally, please continue to combine with fig. 1, fig. 4 and fig. 5, the embodiment further provides that the first fixing plate 40B is embedded and fixed with the second side wall 102A12, one side of the first fixing plate 40B facing the second side wall 102A12 is provided with a plurality of protruding blocks 40B1, the second side wall 102A12 is provided with a plurality of grooves 102A121 corresponding to the protruding blocks 40B1, and the first fixing plate 40B is embedded in the grooves 102A121 through the protruding blocks 40B1 and fixed with the first side wall 102A, so that the first edge-covering plate 40 is fixedly arranged on the step structure 102A1 and simultaneously can be embedded in the grooves 102A121 through the protruding blocks 40B1, so that the fixing effect of the first edge-covering plate 40 and the first side wall 102A is further enhanced, and the supporting strength of the first edge-covering plate 40 can be further improved after the display panel 001 is assembled.

Optionally, please continue to combine with reference to fig. 1, fig. 4 and fig. 5, the embodiment further sets the first support plate 40A to be attached to the first table top 102a11, and a structure with thin thickness and adhesive properties such as a double faced adhesive tape AT1 can be set between the first support plate 40A and the first table top 102a11 to realize fixed attachment, so that the thickness of the whole module can be prevented from being increased while the attachment flatness and the firmness are ensured.

Alternatively, referring to fig. 1, fig. 4 and fig. 6 in combination, fig. 6 is a schematic diagram of another cross-sectional structure in the direction A-A' in fig. 1, in which the first fixing plate 40B and the second side wall 102A12 are clamped and fixed, the first fixing plate 40B is provided with a plurality of protrusions 40B1 disposed at one side of the first fixing plate 40B facing the second side wall 102A12, the second side wall 102A12 is provided with a plurality of grooves 102A121 corresponding to the protrusions 40B1, the first fixing plate 40B is clamped and fixed in the grooves 102A121 by the protrusions 40B1 and fixed to the first side wall 102A, and the protrusions 40B1 can extend obliquely, i.e. an included angle α between the protrusions 40B1 and the first fixing plate 40B can be an acute angle, so that the protrusions 40B1 are clamped and fixed in the grooves 102A121 in a similar shape, thereby being beneficial to further enhancing the clamping and fixing effect of the second side wall 102A12 and the first fixing plate 40B, and further guaranteeing the stability of the first wrapping plate 40 and the first side wall 102A.

In some alternative embodiments, please continue to refer to fig. 1, fig. 4 and fig. 5, in this embodiment, in a direction parallel to the light-emitting surface E of the backlight module 000, the width W1 of the first mesa 102a11 is greater than or equal to 1.3mm, and in a 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 3mm.

In the step structure 102A1 of the first side board 102A, in the direction parallel to the light emitting surface E of the backlight module 000, the width W1 of the first table board 102A11 is greater than or equal to 1.3mm, through which the first edge-covering board 40 can be effectively supported, which avoids the situation that the first edge-covering board 40 is easy to fall on the step structure 102A1 due to the too narrow width W1 of the first table board 102A11, and is further beneficial to improving the stability of the first edge-covering board 40. In addition, in the embodiment, in the direction Z perpendicular to the light emitting surface E of the backlight module 000, the height H1 of the second side wall 102a12 is greater than or equal to 3mm, so that the second side wall 102a12 has a sufficient height to set the groove 102a121 to block the bump 40B1 in the direction Z perpendicular to the light emitting surface E of the backlight module 000, and 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, so that the bump 40B1 is ensured to have a sufficient height to generate the effect of being blocked in the groove 102a121, and meanwhile, the situation that the second side wall 102a12 is too small in height, which easily causes that the display panel 001 does not have a sufficient thickness space when assembled on the first edge-covering plate 40 is avoided, thereby achieving a better overall module assembly effect.

In some alternative embodiments, please refer to fig. 1, fig. 7, fig. 8 and fig. 9 in combination, fig. 7 is an enlarged view of a structure of a region C in fig. 1, fig. 8 is an enlarged view of a structure of a region C in fig. 1, and fig. 9 is an enlarged view of a structure of a region C in fig. 1, in which the shape of the orthographic projection of the first buckle 401 to the plane of the back plate 101 includes one of a straight line shape or a T-shape.

The explanation of this embodiment illustrates that the first buckle 401 of the first edge-covering plate 40 is embedded in the first clamping groove 102A2 of the first side plate 102A, so that the fixing of the first edge-covering plate 40 and the first side plate 102A can be realized, the carrying capacity and strength of the first edge-covering plate 40 can be improved, in the direction Z perpendicular to the light-emitting surface E of the backlight module 000, after the display panel 001 is assembled, the first edge-covering plate 40 is prevented from collapsing easily due to the pressure generated by the weight of the display panel 001, the phenomenon of crush of the optical film 30 occurs, meanwhile, any one of a shape (shown in fig. 7) or a shape (shown in fig. 9) of the orthographic projection of the first buckle 401 to the plane of the back plate 101 is provided, the shape of the orthographic projection of the first buckle 401 to the plane of fig. 7 can be the shape of the orthographic projection of the first buckle 401 shown in fig. 8, the shape of the orthographic projection of the first buckle 401 to the plane of the T shown in fig. 9 can be further connected with the first side plate 102A through the shape of the T-shaped buckle, and the shape of the orthographic projection of the first buckle 401 can be better like the first side plate 102A hook the first edge-covering plate 102A.

In some alternative embodiments, please refer to fig. 1, 4 and 10 in combination, fig. 10 is a schematic cross-sectional view of fig. 1 in the direction A-A', and a first double-sided adhesive AT2 is disposed between the first buckle 401 and the first slot 102 A2.

The embodiment explains that the first buckle 401 of the first edge-covering plate 40 is embedded in the first clamping groove 102A2 of the first side plate 102A, so that the first edge-covering plate 40 and the first side plate 102A can be fixed, the bearing capacity and strength of the first edge-covering plate 40 are improved, meanwhile, the first double faced adhesive tape AT2 can be arranged between the first buckle 401 and the first clamping groove 102A2, and the first double faced adhesive tape AT2 with small thickness and viscosity is attached between the first buckle 401 and the first clamping groove 102A2, so that the firmness between the first buckle 401 and the first side plate 102A is further enhanced.

In some alternative embodiments, please refer to fig. 4, 10, 11, 12, and 13, fig. 11 is another schematic plan view of a backlight module according to an embodiment of the present invention (it can be understood that, for clarity of illustration of the structure of the housing in the backlight module according to the embodiment, the transparent filling is performed in fig. 11), fig. 12 is a schematic sectional view of the direction D-D' in fig. 11, fig. 13 is a schematic enlarged partial structure of the assembled second side plate of the backlight module according to the embodiment, and the side plate 102 of the backlight module 000 further includes a second side plate 102B;

In the direction Z perpendicular to the light emitting surface E of the backlight module 000, a second edge-covering plate 50 is fixedly disposed on a side of the second side plate 102B away from the back plate 101.

The present embodiment explains that, while the side plate 102 integrally formed with the back plate 101 may include the first side plate 102A and the second side plate 102B in the foregoing embodiment, optionally, the backlight module 000 of the present embodiment may be a side-in backlight, as shown in fig. 11, a plurality of light sources 20 arranged along the same direction may be disposed at the position of the second side plate 102B, so that the rest of the first side plates 102A of the housing 10 may not need to consider the frame width occupied by the light sources 20, and only needs to ensure that the first edge-covering plate 40 has enough support for the display panel, and simultaneously, the width of the step structure 102A1 of the first side plate 102A may be reduced to the greatest extent, so that at least the first side plate 102A of the housing 10 achieves a narrow frame effect. The side plate 102 of the backlight module 000 of the present embodiment includes a second side plate 102B, and the first side plate 102A, the second side plate 102B, and the back plate 101 may be integrally formed with the same material (it is to be understood that only for distinguishing the first side plate 102A and the second side plate 102B, filling different patterns is performed, and 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, the second edge-covering plate 50 is fixedly disposed on the side of the second side plate 102B away from the back plate 101, and the optional second edge-covering plate 50 may be a structure for covering the end of the second side plate 102B away from the back plate 101, so that the display panel 001 can be supported by the structure of the second edge-covering plate 50, so that the optical film 30 is prevented from being damaged by pressure after assembly, and a space for sufficiently placing the light source 20 and a flexible circuit board (not illustrated in the figure) for driving the light source 20 to emit light can be provided at the position of the second side plate 102B.

Optionally, referring to fig. 4, 10, 11, 12, and 13, the backlight module 000 in the present embodiment may be a side-in backlight, the optical film 30 at least includes a light guide plate 302, the light source 20 is located at one side of the light guide plate 302 in a direction parallel to the light emitting surface E of the backlight module 000, the light emitting surface 20E of the light source 20 faces the light guide plate 302, and the second side plate 102B is opposite to the light source 20; the optical film 30 may further include a diffusion sheet 303, a reflection sheet 301, a brightness enhancing sheet 304, and the like, and the plurality of light sources 20 are arranged in one elongated direction such that the light emitting surfaces of the light sources 20 face the side surfaces of the light guide plate 302 and form a surface light source by the light guiding action of the light guide plate 302.

The second side plate 102B of the present embodiment includes a first sub-side plate 102B1 and a second sub-side plate 102B2, as shown in fig. 12, in a direction parallel to the light emitting surface E of the backlight module 000, the second sub-side plate 102B2 is located at a side of the first sub-side plate 102B2 away from the light source 20;

the second edge-covering plate 50 comprises a second supporting plate 50A and a second fixing plate 50B which are arranged in an intersecting manner, the second supporting plate 50A is parallel to the light-emitting surface E of the backlight module 000, the second supporting plate 50A extends towards a direction away from the second sub-side plate 102B2, and the second fixing plate 50B is intersected with the light-emitting surface E of the backlight module 000; alternatively, the embodiment is exemplified by the second fixing plate 50B being perpendicular to the light emitting surface E of the backlight module 000;

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 clamped and fixed with the first sub-side plate 102B 1;

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

The present embodiment illustrates that the second side plate 102B located at the side of the side-entrance light source may include a first sub-side plate 102B1 and a second sub-side plate 102B2, the first sub-side plate 102B1 and the second sub-side plate 102B2 are connected to each other in a direction parallel to the light-emitting surface E of the backlight module 000 to form the second side plate 102B, and the second sub-side plate 102B2 is located at a 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 a second supporting plate 50A and a second fixing plate 50B which are arranged in an intersecting manner, the second supporting plate 50A is located on one side, far away from the backboard 101, of the first sub-side plate 102B1, the second fixing plate 50B is located between the first sub-side plate 102B1 and the second sub-side plate 102B2, one side, far away from the backboard 101, of the second supporting plate 50A is attached and fixed with the first sub-side plate 102B1 through the second supporting plate 50A, the second fixing plate 50B is embedded and fixed with the first sub-side plate 102B1, the fixed connection between the second edge-covering plate 50 and the second side plate 102B is achieved, one side, far away from the backboard 101, of the second supporting plate 50A can be used for supporting the display panel 001, and therefore the stable supporting performance of the second edge-covering plate 50 can be guaranteed through setting the width of the second supporting plate 50A.

In some alternative embodiments, please refer to fig. 11, 13 and 14, fig. 14 is a schematic cross-sectional view of fig. 11D-D' to another, in which in the present embodiment, a plurality of second clamping grooves 50B1 are formed on the second fixing plate 50B, a plurality of second clamping buckles 102B11 corresponding to the second clamping grooves 50B1 are disposed on the first sub-side plate 102B1, and the first sub-side plate 102B1 is clamped in the second clamping grooves 50B1 by the second clamping buckles 102B11 and fixed with the second fixing plate 50B.

The embodiment explains that the second fixing plate 50B is fixedly clamped with the first sub-side plate 102B1, the second fixing plate 50B is provided with a plurality of second clamping grooves 50B1, the second clamping grooves 50B1 may be hole structures penetrating through the thickness of the second fixing plate 50B, the first sub-side plate 102B1 is provided with a plurality of second clamping buckles 102B11 corresponding to the second clamping grooves 50B1, the second clamping buckles 102B11 may be protruding structures, the first sub-side plate 102B1 is clamped in the second clamping grooves 50B1 through the second clamping buckles 102B11 and is fixed with the second fixing plate 50B, so that the second fixing plate 50B of the second cladding plate 50 may be fixedly arranged between the first sub-side plate 102B1 and the second sub-side plate 102B2, and meanwhile, the fixing effect of the second cladding plate 50 and the second side plate 102B may be further enhanced through the second clamping buckles 102B11, and the supporting strength of the second cladding plate 50 may be further enhanced after the display panel 001 is assembled.

Optionally, please continue to refer to fig. 11, fig. 13, and fig. 15 in combination, fig. 15 is a schematic view of a cross-sectional structure of D-D' in fig. 11 toward another, and in this embodiment, a second support plate 50A is further disposed to be attached to and fixed to a side of the first sub-side plate 102B1 away from the back plate 101, and a structure with a thin thickness and an adhesive property such as a double faced adhesive tape AT3 may be disposed between the second support plate 50A and an end of the first sub-side plate 102B1 away from the back plate 101 to achieve a fixed attachment, so that the attachment flatness and the firmness are ensured, and the thickness of the whole module is prevented from being increased.

In some alternative embodiments, please refer to fig. 16, 17 and 18, fig. 16 is another schematic plan view of the backlight module according to the embodiment of the present invention (it is to be understood that, for clarity of illustration of the structure of the housing in the backlight module according to the embodiment, fig. 16 is filled with transparency), fig. 17 is a schematic cross-sectional view of the direction F-F 'in fig. 16, and fig. 18 is a schematic cross-sectional view of the direction G-G' in fig. 16, in the embodiment, in the direction Z perpendicular to the light-emitting surface E of the backlight module 000, a side of the second fixing plate 50B away from the back plate 101 further includes a plurality of third buckles 501, the extending 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 102B 1;

The side of the second sub-side plate 102B2 away from the back plate 101 is provided with a plurality of third clamping grooves 102B2 corresponding to the third clamping buckles 501, and the second fixing plate 50B is clamped in the third clamping grooves 102B21 through the third clamping buckles 501 and is fixed with the second sub-side plate 102B 2.

The explanation of the embodiment shows 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 further includes a plurality of third buckles 501, and optionally, the third buckles 501 may be integrally formed with the second edge-covering plate 50, which is beneficial to improving the process efficiency; the extending direction of the third buckle 501 is parallel to the light emitting surface E of the backlight module 000, the third buckle 501 extends towards the direction away from the first sub-side plate 102B1, a plurality of third clamping grooves 102B21 corresponding to the third buckle 501 are formed on one side of the second sub-side plate 102B2 away from the back plate 101, the surface of one side of the second sub-side plate 102B2 away from the back plate 101 is recessed towards the direction close to the back plate 101 to form the third clamping groove 102B21, and the second fixing plate 50B of the second edge-covering plate 50 is embedded in the third clamping groove 102B21 through the third buckle 501 and is fixed with the second sub-side plate 102B 2.

It should be noted that, fig. 16 of the present embodiment only illustrates the number of the third buckles 501 and the corresponding third clamping grooves 102B21, but does not represent the actual number, and in a specific implementation, the number of the third buckles 501 may be designed according to the actual size of the backlight module 000, and optionally, the plurality of third buckles 501 may be uniformly arranged on the second side plate 102B, that is, the distances between any two adjacent third buckles 501 may be set to be equal, so as to be beneficial to balancing the fixing effect of the second edge-covering plate 50 and the second side plate 102B.

In some alternative embodiments, please refer to fig. 16, 19 and 20 in combination, fig. 19 is an enlarged view of the area I in fig. 16, fig. 20 is an enlarged view of the area I in fig. 16, and in this embodiment, the shape of the orthographic projection of the third buckle 501 to the plane of the back plate 101 includes any one of a straight line shape and a T-shape.

The embodiment explains that the third buckle 501 of the second edge-covering plate 50 is embedded in the third clamping groove 102B21 embedded in the second sub-side plate 102B2, so as to realize the fixation of the second edge-covering plate 50 and the second side plate 102B, improve the bearing capacity and strength of the second edge-covering plate 50, prevent the pressure generated by the weight of the display panel 001 from easily collapsing the second edge-covering plate 50 after the display panel 001 is assembled in the direction Z perpendicular to the light-emitting surface E of the backlight module 000, and simultaneously, generate the phenomenon of crush the optical film 30, the shape of the orthographic projection of the third buckle 501 to the plane of the back plate 101 comprises any one of a straight line shape (shown in fig. 19) or a T-shape (shown in fig. 20), the orthographic projection of the third buckle 501 to the plane of the back plate 101 is a straight line shape shown in fig. 19, the process of integrally forming the third buckle 501 and the second edge-covering plate 50 can be simplified, the orthographic projection of the third buckle 501 to the plane of the back plate 101 is a T-shape shown in fig. 20, and the connection firmness of the second edge-covering plate 50 and the second side plate 102B can be further improved by better hooking two convex structures similar to ears of the T-shape in the third clamping groove 102B 21.

In some alternative embodiments, referring to fig. 16 and 21 in combination, fig. 21 is a schematic cross-sectional view of fig. 16 in the direction F-F', and a second double-sided tape AT4 is disposed between the third buckle 501 and the third slot 102B 21.

The embodiment explains that the third buckle 501 of the second edge-covering plate 50 is embedded in the third clamping groove 102B21 of the second sub-side plate 102B2, so that the second edge-covering plate 50 and the second side plate 102B can be fixed, the bearing capacity and strength of the second edge-covering plate 50 can be improved, meanwhile, the second double-sided adhesive AT4 can be arranged between the third buckle 501 and the third clamping groove 102B21, and the second double-sided adhesive AT4 with thin thickness and viscosity is attached between the third buckle 501 and the third clamping groove 102B21, so that the firmness between the third buckle 501 and the second sub-side plate 102B2 can be further enhanced.

In some alternative embodiments, please continue to refer to fig. 11 and fig. 12, in this embodiment, in a direction parallel to the light-emitting surface E of the backlight module 000, the width W2 of the first sub-side plate 102B1 is greater than or equal to 1.5mm along the direction in which the first sub-side plate 102B1 points to the second sub-side plate 102B 2.

The explanation of this embodiment illustrates that, in the second side plate 102B, the first sub-side plate 102B1 that functions to support the second edge-covering plate 50 may 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 to the second sub-side plate 102B2, and the width W2 of the first sub-side plate 102B1 is greater than or equal to 1.5mm, so that the width of the first sub-side plate 102B1 that supports the second edge-covering plate 50 is greater, and through this width, the second edge-covering plate 50 can be effectively supported, so that the first sub-side plate 102B1 is prevented from being damaged when the second edge-covering plate 40 is pressed down, and the stability of the module is affected.

In some alternative embodiments, please refer to fig. 1-4 and fig. 22 in combination, fig. 22 is a schematic plan view of a display device according to an embodiment of the present invention, and the display device 111 according to the embodiment of the present invention includes the backlight module 000 according to the above embodiment of the present invention. The embodiment of fig. 22 is only an example of a mobile phone, and the display device 111 is described, and it is to be understood that the display device 111 provided in the embodiment of the present invention may be other display devices 111 having a display function, such as a computer, a television, and a vehicle-mounted display device, which is not particularly limited in the present invention. Alternatively, as shown in fig. 22 and 23, fig. 23 is a schematic view of a cross-sectional structure in the direction J-J' in fig. 22, where the display device 000 of the present embodiment includes a display panel 001 and the backlight module 000 in the above embodiment, and the display panel 001 is located at one side of the light emitting surface E of the backlight module 000; the display panel 001 is disposed on the first hemming plate 40. Further alternatively, when the side panel 102 further includes the second side panel 102B, the first and second hemming panels 40 and 50 are used to jointly carry the display panel 001 (not illustrated in the drawings, and can be understood in particular in connection with the embodiments shown in fig. 11-13). The display device 111 provided in the embodiment of the present invention has the beneficial effects of the backlight module 000 provided in the embodiment of the present invention, and the specific description of the backlight module 000 in the above embodiments may be referred to in detail, which is not repeated herein.

In some alternative embodiments, referring to fig. 22 and 24 in combination, fig. 24 is a schematic view of another cross-section of fig. 22 in the direction J-J', and a first cushion 60 is disposed between the display panel 001 and the first edging plate 40.

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-covering plate 40, the first cushion pad 60 is disposed between the display panel 001 and the first edge-covering plate 40, and the first cushion pad 60 may be foam double faced adhesive tape, which is not only soft, but also has the effect of buffering the glass substrate of the display panel 001, and can prevent the display defects of uneven display brightness (mura) due to stress of the glass substrate edge of the display panel 001, and simultaneously has the effect of fixing the display panel 001 and the first edge-covering plate 40. Optionally, when the side plate 102 further includes the second side plate 102B, the first and second edge-covering plates 40 and 50 are used for jointly carrying the display panel 001, and the cushion pad (not illustrated in the drawings) may also be disposed between the display panel 001 and the second edge-covering plate 50, which is specifically understood in conjunction with the embodiment shown in fig. 11-13, and this embodiment is not described herein.

According to the embodiment, the backlight module and the display device provided by the invention have the following beneficial effects:

While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may 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. The backlight module is characterized by comprising a shell, a light source and a plurality of optical films, wherein the shell forms a space for accommodating the light source and the optical films;

the shell comprises a back plate and a side plate which are connected, the extending direction of the back plate is parallel to the light-emitting surface of the backlight module, and the extending direction of the side plate is intersected with the light-emitting surface of the backlight module;

the side plate at least comprises a first side plate, one side of the first side plate, which is far away from the back plate, comprises a step structure in the direction perpendicular to the light emitting surface of the backlight module, and a first edge covering plate is fixedly arranged on the step structure;

in the direction perpendicular to the light-emitting surface of the backlight module, one side of the first edge-covering plate, which is far away from the back plate, further comprises a plurality of first buckles, the extending 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;

A plurality of first clamping grooves corresponding to the first buckles are formed in one side, far away from the back plate, of the first side plate, and the first edge-covering plate is clamped in the first clamping grooves through the first buckles and is fixed with the first side plate;

the step structure comprises a first table surface and a second side wall, the width of the first table surface is larger than or equal to 1.3mm in the direction parallel to the light-emitting surface of the backlight module, and the height of the second side wall is larger than or equal to 3mm in the direction perpendicular to the light-emitting surface of the backlight module.

2. A backlight module according to claim 1, wherein,

the first table surface is parallel to the light-emitting surface of the backlight module, and the second side wall is intersected with the light-emitting surface of the backlight module;

the first edge-covering plate comprises a first supporting plate and a first fixing plate which are arranged in an intersecting manner, the first supporting plate is parallel to the light-emitting surface of the backlight module, the first supporting plate extends towards the direction away from the first side plate, and the first fixing plate is intersected with the light-emitting surface of the backlight module;

in the direction perpendicular to the light emitting surface of the backlight module, the first buckle is arranged on one side of the first fixing plate away from the back plate;

The first fixing plate is fixedly clamped with the second side wall, and the first supporting plate is fixedly attached to the first table top.

3. The backlight module according to claim 2, wherein a plurality of protruding blocks are arranged on one side of the first fixing plate facing the second side wall, a plurality of grooves corresponding to the protruding blocks are arranged on the second side wall, and the first fixing plate is clamped in the grooves through the protruding blocks and is fixed with the first side plate.

4. The backlight module according to claim 1, wherein the orthographic projection of the first buckle to the plane of the back plate comprises any one of a straight line shape and a T-shape.

5. The backlight module according to claim 1, wherein a first double-sided adhesive is disposed between the first buckle and the first clamping groove.

6. The backlight module according to claim 1, wherein the side plate further comprises a second side plate;

and a second edge-covering plate is fixedly arranged on one side of the second side plate, which is far away from the back plate, in the direction perpendicular to the light-emitting surface of the backlight module.

7. A backlight module according to claim 6, wherein,

the optical film at least comprises a light guide plate, the light source is positioned at one side of the light guide plate in the direction parallel to the light emitting surface of the backlight module, the light emitting surface of the light source faces the light guide plate, and the second side plate is opposite to the light source in position;

The second side plate comprises a first sub side plate and a second sub side plate, and the second sub side plate is positioned at one side of the first sub side plate far away from the light source in the direction parallel to the light emitting surface of the backlight module;

the second edge-covering plate comprises a second supporting plate and a second fixing plate which are arranged in an intersecting manner, the second supporting plate is parallel to the light-emitting surface of the backlight module, the second supporting plate extends towards the direction away from the second sub-side plate, and the second fixing plate is intersected with the light-emitting surface of the backlight module;

the second fixing plate is positioned between the first sub-side plate and the second sub-side plate, and is clamped and fixed with the first sub-side plate;

the second support plate is attached and fixed with one side, away from the backboard, of the first sub-side plate.

8. The backlight module according to claim 7, wherein a plurality of second clamping grooves are formed in the second fixing plate, a plurality of second buckles corresponding to the second clamping grooves are arranged on the first sub-side plate, and the first sub-side plate is clamped in the second clamping grooves through the second buckles and is fixed with the second fixing plate.

9. The backlight module according to claim 7, wherein in a direction perpendicular to the light-emitting surface of the backlight module, a side of the second fixing plate away from the back plate further comprises a plurality of third buckles, an extending 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 is far away from one side of the backboard, a plurality of third clamping grooves corresponding to the third clamping buckles are formed in the second sub-side plate, and the second fixing plate is clamped in the third clamping grooves through the third clamping buckles and is fixed with the second sub-side plate.

10. The backlight module according to claim 9, wherein the shape of the orthographic projection of the third buckle to the plane of the back plate comprises any one of a straight line shape or a T-shape.

11. The backlight module according to claim 9, wherein a second double-sided tape is disposed between the third buckle and the third slot.

12. A backlight module according to claim 7, wherein the width of the first sub-side plate is greater than or equal to 1.5mm along the direction in which the first sub-side plate points to the second sub-side plate in a direction parallel to the light-emitting surface of the backlight module.

13. A backlight module according to claim 1, wherein the housing comprises a cast aluminum material and the first edge-covering plate comprises sheet metal.

14. A display device, characterized by comprising a display panel and the backlight module set according to any one of claims 1-13, which are oppositely arranged, wherein the display panel is positioned at one side of the light emitting surface of the backlight module set; the display panel is arranged on the first edge-covering plate.

15. The display device of claim 14, wherein a first cushion pad is disposed between the display panel and the first hemming plate.