Backlight module, display module and display device thereof

Abstract

The embodiment of the utility model provides a backlight module, a display module and a display device thereof, relates to the technical field of display, and is used for reducing a frame of the display device. The backlight module comprises a back plate, a light guide plate, a light bar and an elastic piece. The back plate comprises a bottom plate and side plates, and the side plates surround the bottom plate to form an assembly space. The side plate is provided with an opening. The light guide plate is arranged in the assembly space. The light guide plate comprises a side face opposite to the side plate. The light bar is arranged between the light guide plate and the side plate. The elastic piece comprises a supporting part and a first positioning part, and the supporting part is arranged between the light guide plate and the bottom plate. The first positioning part is arranged on the side, away from the bottom plate, of the supporting part. The first positioning part is located at the opening, and the orthographic projection of the first positioning part on the reference surface is located in the range of the orthographic projection of the opening on the reference surface. The reference surface is a side surface of the light guide plate opposite to the first positioning part. The first positioning part and the light bar are located on different sides of the light guide plate and abut against the light guide plate. The backlight module is used for displaying images.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, and in particular, to a backlight module, a display module and a display device thereof. BACKGROUND

[0002] With the rapid development of display technology, display devices have gradually spread in people's lives. Among them, liquid crystal display devices (LCD) are widely used in display devices such as mobile phones, televisions, notebook computers, medical displays, etc. due to their low cost, high reliability, high brightness, and long service life.

[0003] At present, the market requires narrower and narrower frame of display devices, and higher and higher reliability of display devices. However, as the market improves the product reliability standards, it is more difficult to reduce the frame of display devices. Therefore, how to reduce the frame of display devices is a problem to be solved at present. CONTENT OF THE INVENTION

[0004] Embodiments of the present disclosure aim to provide a backlight module, a display module and a display device thereof for reducing the frame of display devices.

[0005] To achieve the above-mentioned purpose, embodiments of the present disclosure provide the following technical solutions:

[0006] In one aspect, a backlight module is provided. The backlight module includes a back plate, a light guide plate, a light bar and an elastic piece. The back plate includes a bottom plate and a side plate, the side plate is arranged on one side of the bottom plate and is arranged around the circumference of the bottom plate to form an assembly space. The side plate is provided with an opening. The light guide plate is arranged in the assembly space. The light guide plate includes a side surface arranged opposite to the side plate. The light bar is arranged between the light guide plate and the side plate, and the light emitting side of the light bar is opposite to the side surface of the light guide plate. The elastic piece includes a supporting part and a first positioning part, the supporting part is arranged between the light guide plate and the bottom plate. The first positioning part is arranged on the side of the supporting part away from the bottom plate. The first positioning part is located at the opening, and the orthogonal projection of the first positioning part on a reference surface is located within the orthogonal projection range of the opening on the reference surface. The reference surface is the side surface of the light guide plate opposite to the first positioning part. The first positioning part and the light bar are located on different sides of the light guide plate, and abut against the light guide plate.

[0007] In the above backlight module, since the first positioning part is not located between the side plate and the side surface of the light guide plate, the frame width of the display device can save the thickness of the side plate. The frame width of the display device satisfies the following formula:

[0008] W LCM≥ T0 + D LGP～AA + T MF + T b + Gap Total .

[0009] wherein, W LCM is the frame width of the display device, T0 is the thickness of the first positioning part in the fourth direction, D LGP～AA is the distance between the boundary of the light guide plate and the boundary of the display area, T MF is the thickness of the middle frame in the fourth direction, T b is the thickness of the front frame, and Gap Total is the sum of the gaps between the components in the fourth direction.

[0010] According to the above formula, the frame width of the display device does not need to consider the thickness of the side plate, therefore, the first positioning part is not located between the side plate and the side surface of the light guide plate, which can reduce the frame width of the display device. For example, taking the display device as a rectangle, i.e., the orthographic projection of the light guide plate on the bottom plate is a rectangle, and the lamp strip is arranged on one side of the light guide plate along the second direction, in the first direction, T0 is 1.4 mm, D LGP～AA is 2 mm, T MF is 0.7 mm, Gap Total is 0.2 mm, and W LCM can reach 516.64 mm.

[0011] In some embodiments, in the orthographic projection on the bottom plate, the length of the opening is greater than or equal to the length of the first positioning part; and / or, the length of the opening is less than the length of the support part.

[0012] In some embodiments, the side surface includes a first side surface and a second side surface, the side plate includes a first side plate and a second side plate, the lamp strip is located between the first side plate and the first side surface, each second side plate is arranged opposite to one second side surface, and each second side plate is provided with the opening.

[0013] In some embodiments, the opening comprises a first opening, and the elastic member comprises a first elastic member located at the first opening. The first opening penetrates the second side plate in a third direction, which is perpendicular to the bottom plate. The second side plate comprises a plurality of first sub-plates, and the first sub-plates are arranged at intervals. The first opening is formed between two adjacent first sub-plates. The first positioning portion of the first elastic member abuts against one of the second side surfaces. Alternatively, the first opening penetrates part of the second side plate in a third direction, which is perpendicular to the bottom plate. The second side plate comprises a plurality of first sub-plates and second sub-plates. The first sub-plates are arranged at intervals, and one second sub-plate is arranged between two adjacent first sub-plates. The first opening is formed between two adjacent first sub-plates and the second sub-plate. The first positioning portion of the first elastic member abuts against one of the second side surfaces.

[0014] In some embodiments, the opening comprises a second opening, and the elastic member comprises a second elastic member located at the second opening. At the corner of two adjacent second side plates, the second opening is formed by recessing the two adjacent second side plates in a third direction, which is perpendicular to the bottom plate. The first positioning portion of the second elastic member abuts against both of the second side surfaces.

[0015] In some embodiments, the opening comprises a third opening, and the elastic member comprises a third elastic member located at the third opening. At the corner of the first side plate and the second side plate, the third opening is formed by recessing the first side plate and the second side plate in the third direction. The first positioning portion of the third elastic member abuts against one of the second side surfaces.

[0016] In some embodiments, the light bar comprises a substrate and a light source, and the light source is arranged between the substrate and the first side surface. The third elastic member further comprises a second positioning portion, which is arranged on the side of the support portion away from the bottom plate. The second positioning portion abuts against the substrate and the first side surface.

[0017] In some embodiments, the orthographic projection of the light guide plate on the bottom plate is a rectangle. The first positioning portion of the second elastic member comprises a first sub-portion and a second sub-portion connected to each other. In a first direction, the second sub-portion is located on one side of the light guide plate. In a second direction, the first sub-portion is located on one side of the light guide plate. The second direction is perpendicular to the first side surface, the first direction is perpendicular to the second direction, and parallel to the bottom plate.

[0018] The thickness of the first sub-portion and the thickness of the second positioning portion of the third elastic member satisfy the following formula:

[0019] TD ×H D ≤Gap LGP～LED ;

[0020] T U ×H U +T D ×H D ≥k1W+b1;

[0021] T U for the thickness of the first sub-portion, T D for the thickness of the second positioning portion of the third elastic member, H U for the hardness of the first sub-portion, H D for the hardness of the second positioning portion of the third elastic member, Gap LGP～LED for the distance between the light guide plate and the light source, W for the width of the light guide plate in the second direction; k1 is 0.002-0.004; b1 is 0.16-1.32.

[0022] In some embodiments, the orthographic projection of the light guide plate on the bottom plate is a rectangle, the first positioning portion of the second elastic member comprises a first sub-portion and a second sub-portion connected with each other, along a first direction, the second sub-portion is located at one side of the light guide plate. Along a second direction, the first sub-portion is located at one side of the light guide plate. The second direction is perpendicular to the first side surface, the first direction is perpendicular to the second direction and parallel to the bottom plate.

[0023] The thickness of the second sub-portion and the thickness of the first positioning portion of the third elastic member satisfy the following formula:

[0024] T R =k2L+b2;

[0025] wherein, T R for the thickness of the second sub-portion or the thickness of the first positioning portion of the third elastic member, L for the length of the light guide plate in the first direction, k2 is 0.001-0.01; b2 is -1.2-0.7.

[0026] In some embodiments, the thickness of the first positioning portion is greater than the thickness of the side plate.

[0027] In some embodiments, at least part of the support portion is staggered with the opening, and the part of the support portion staggered with the opening abuts against the side plate.

[0028] In some embodiments, the backlight module further comprises a middle frame, the middle frame is arranged around the periphery of the light guide plate. The middle frame is provided with a groove near one side of the bottom plate, and the side plate is connected with the groove at one end away from the bottom plate. The elastic member further comprises a clamping portion, the clamping portion is arranged on the side away from the supporting portion of the first positioning portion, and the clamping portion is connected with the groove.

[0029] In some embodiments, the thickness of the clamping portion is equal to the thickness of the side plate.

[0030] In some embodiments, the opening comprises a second opening, and the elastic member comprises a second elastic member arranged in the second opening. Adjacent to the corners of two second side plates, the two second side plates are recessed to form the second opening in a third direction perpendicular to the bottom plate. The first positioning portion of the second elastic member abuts against both of the second side plates. The second elastic member comprises two clamping portions, the two clamping portions are arranged at intervals, and the two clamping portions are respectively opposite to the two second side plates.

[0031] In another aspect, a display module is provided. The display module comprises the backlight module according to any one of the above embodiments and a display panel, the display panel is arranged on the side of the light guide plate away from the bottom plate.

[0032] In some embodiments, the backlight module comprises a middle frame, the middle frame is arranged around the periphery of the light guide plate. The display module further comprises a first elastic supporting member, a touch layer and an optical adhesive, the first elastic supporting member is arranged between the middle frame and the display panel, the touch layer is arranged on the side of the display panel away from the backlight module, and the optical adhesive is arranged between the touch layer and the display panel.

[0033] In some embodiments, the light guide plate comprises a first side and a second side, the side plate comprises a first side plate and a second side plate, the light bar is located between the first side plate and the first side, and each second side plate is arranged opposite to one second side.

[0034] The middle frame comprises a first side frame and a second side frame. The first side frame is in abutment with the first side plate. In a direction of the first side plate pointing to the first side, the first side frame is away from one side of the bottom plate, and the distance between the first side frame and the touch layer decreases in turn, forming a plurality of steps. The step with the largest distance between the first side frame and the touch layer in the plurality of steps is a first step, and the first elastic support is arranged on a side of the first step away from the bottom plate. The step with the smallest distance between the first side frame and the touch layer in the plurality of steps is a second step, and the second step is arranged staggered with the display panel and at least partially opposite to the touch layer. The second side frame is in abutment with the second side plate. In a direction of the second side plate pointing to the second side opposite to the first side, the second side frame is away from one side of the bottom plate, and the distance between the second side frame and the touch layer is equal.

[0035] In some embodiments, the distance between the surface of the second step away from the bottom plate and the surface of the display panel away from the bottom plate satisfies the following formula:

[0036] H + T O ≥ T S × ρ P ;

[0037] wherein H is the distance between the surface of the second step away from the bottom plate and the surface of the display panel away from the bottom plate, T O is the thickness of the optical adhesive, T S is the thickness of the first elastic support, P1 is a preset pressure, ρ P is the compression ratio of the first elastic support under the preset pressure, M is the weight of the component borne by the first elastic support, S is the area of the first elastic support in contact with the display panel, and P2 is the pressure applied in the process of bonding the display panel and the first elastic support.

[0038] In another aspect, a display device is provided. The display device comprises the display module as described in any of the above embodiments.

[0039] The display device and the display module described above have the same structure and beneficial technical effects as the backlight module provided in some of the above embodiments, and will not be described here again. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the present disclosure, the drawings needed to be used in the embodiments of the present disclosure will be briefly introduced. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art based on these drawings. In addition, the drawings in the following description can be regarded as schematic diagrams, and are not limited to the actual size, actual process, actual timing of signals, etc. of the products involved in the embodiments of the present disclosure.

[0041] Figure 1 A structural diagram of a display device according to some embodiments;

[0042] Figure 2 A structural diagram of a display module according to some embodiments; Figure 1 A sectional view along the sectional line A-A' in FIG. 1;

[0043] Figure 3 A top view of a display module according to some embodiments;

[0044] Figure 4 A sectional view along the sectional line B-B' in FIG. 2; Figure 3

[0045] A sectional view along the sectional line C-C' in FIG. 3; Figure 5 Figure 3 A structural diagram of a light guide plate according to some embodiments;

[0046] Figure 6 A partial enlarged view of an assembly of a back plate and a first elastic member of a backlight module according to some embodiments;

[0047] Figure 7A A partial enlarged view of an opening of a back plate of a backlight module according to some embodiments;

[0048] Figure 7B A partial enlarged view of an opening of another back plate of a backlight module according to some embodiments;

[0049] Figure 7C A partial enlarged view of an assembly of a back plate, a first elastic member and a light guide plate of a backlight module according to some embodiments;

[0050] Figure 8 A partial enlarged view of an assembly of a back plate and a second elastic member of a backlight module according to some embodiments;

[0051] Figure 9 A partial enlarged view of an assembly of a back plate, a second elastic member and a light guide plate of a backlight module according to some embodiments;

[0052] Figure 10

[0053] ​​Figure 11 FIG. 2 shows a top view of a backlight module according to some embodiments; Figure 10

[0054] Figure 12 FIG. 4 shows a partial enlarged view of an assembly of a back plate, a third elastic member and a light guide plate of a backlight module according to some embodiments;

[0055] Figure 13 FIG. 5 shows another partial enlarged view of an assembly of a back plate, a third elastic member and a light guide plate of a backlight module according to some embodiments;

[0056] Figure 14 FIG. 6 shows a top view of a backlight module according to some embodiments. Figure 12 DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present disclosure but not all the embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present disclosure.

[0058] Unless otherwise required by context, the term “comprise” and other forms thereof such as “comprises” and “comprising” are to be construed as open, inclusive, meaning that “comprising” means “including, but not limited to.” In the description of the specification, the terms “one embodiment,” “some embodiments,” “exemplary embodiments,” “example,” “specific example” or “some examples” are intended to indicate that a particular feature, structure, material, or characteristic included in at least one embodiment or example of the present disclosure. The illustrative representations of the above terms do not necessarily indicate the same embodiment or example. In addition, the specific features, structures, materials or characteristics described can be included in any one or more embodiments or examples in any appropriate manner.

[0059] Hereinafter, the terms “first” and “second” are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first” and “second” can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, the meaning of “a plurality of” is two or more. ​​

[0060] In describing some embodiments, the term "connection" and its derivative expressions may be used. The term "connection" should be interpreted broadly; for example, "connection" can be a mechanical connection or an electrical connection; it can be a fixed connection or a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art will understand the specific meaning of the above terms herein based on the specific circumstances.

[0061] "At least one of A, B and C" has the same meaning as "at least one of A, B or C", both including the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations of A, B and C.

[0062] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0063] The use of “applies to” or “configured to” in this article implies an open and inclusive language that does not preclude applicability to or configuration to devices that perform additional tasks or steps.

[0064] As used herein, “vertical” includes the described situation and situations that are similar to the described situation, within an acceptable range of deviation, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “vertical” includes absolute verticality and approximate verticality, where an acceptable range of deviation for approximate verticality could be, for example, within 5°.

[0065] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can mean that the layer or element is directly on the other layer or substrate, or that there is an intermediate layer between the layer or element and the other layer or substrate.

[0066] This document describes exemplary embodiments with reference to cross-sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as being limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. For example, etched areas shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the areas of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0067] likeFigure 1 As shown, some embodiments of this disclosure provide a display device 1000, which can be any device that displays text or images, whether in motion (e.g., video) or still (e.g., image).

[0068] For example, see Figure 1 The display device 1000 can be any product or component with a display function, such as a television, laptop, tablet, mobile phone, personal digital assistant (PDA), navigator, in-vehicle display, flight display, wearable device, virtual reality (VR) device, signboard, electronic billboard, shopping mall display, and medical display. For example, the display device 1000 can be... Figure 1 The medical monitor shown.

[0069] From the perspective of the shape of the display device 1000, the display device 1000 can be rectangular, circular, or elliptical, etc., and the embodiments disclosed herein do not specifically limit this. Here, "rectangle" includes not only standard rectangles but also rounded rectangles.

[0070] The following uses a rectangular display device 1000 as an example to illustrate some embodiments of the present disclosure. However, the implementation of the present disclosure is not limited to this, and any other display device 1000 can be considered as long as the same technical concept is applied.

[0071] In some embodiments, see Figure 2 The display device 1000 includes a display module 100 and a housing 200, with the display module 100 disposed within the housing 200. The housing 200 may include a frame 210, the longitudinal section of which may be U-shaped, for example, and the display module 100 may be disposed within the frame 210. Furthermore, the housing 200 may also include a front frame (…). Figure 2 (Not shown in the diagram), the front frame is connected to the frame 210, and the display module 100 is located within the space enclosed by the front frame and the frame 210.

[0072] For example, such as Figure 2 As shown, the housing 200 only includes the frame 210, that is, the display device 1000 does not include the front frame. The width of the bezel of the display device 1000 does not need to take into account the thickness of the front frame, which is beneficial to the narrow bezel design of the display device 1000. However, the embodiments disclosed herein are not limited to this.

[0073] Please continue reading. Figure 2The display module 100 includes a display panel 10 and a cover plate 20. The display panel 10 may include, for example, a display side 10A and a non-display side 10B disposed opposite to each other. The display side 10A refers to the side of the display panel 10 where the image is displayed, and the non-display side 10B refers to the other side opposite to the display side 10A. The display panel 10 is disposed within a frame 210, and the cover plate 20 is disposed on the display side 10A of the display panel 10 and located at the opening of the frame 210.

[0074] Please continue reading. Figure 2 The display module 100 may further include a backlight module 30 and a driving circuit board 40. The backlight module 30 is disposed on the non-display side 10B of the display panel 10 and is used to provide a light source for the display panel 10. The display panel 10 can adjust the amount of light passing through it to display different gray levels, thereby achieving the purpose of image display.

[0075] Furthermore, the driving circuit board 40 is disposed on the side of the backlight module 30 away from the display panel 10, and the driving circuit board 40 is connected to the display panel 10 for transmitting control signals to the display panel 10 to drive the display panel 10 to display images. For example, the driving circuit board 40 can be a flexible circuit board 41 (see...) Figure 4 It is connected to the display panel 10. The driver circuit board 40 may include, for example, a timing controller (TCON), a power management chip (DC / DC), and an adjustable resistor voltage divider circuit (generating Vcom), etc. Of course, the driver circuit board 40 may also include other circuit structures, which will not be listed here.

[0076] Please continue reading. Figure 2 The display panel 10 may include an array substrate 11 and a color filter substrate 12 disposed opposite to each other, and a liquid crystal layer 13 disposed between the array substrate 11 and the color filter substrate 12. The array substrate 11 and the color filter substrate 12 are bonded together by an adhesive sealant 14, thereby confining the liquid crystal layer 13 within the area enclosed by the adhesive sealant 14. The color filter substrate 12 may also be referred to as an opposing substrate or an encapsulation substrate. The color filter substrate 12 can filter the light incident on it to emit light of various colors (such as red, green, or blue) to achieve color display.

[0077] In addition, see Figure 3 The display panel 10 includes a display area AA and a peripheral area BB located on at least one side of the display area AA. Figure 3 The illustration uses the peripheral area BB surrounding the display area AA as an example. Display area AA is the area for displaying images and is configured with multiple sub-pixels P. Sub-pixels P can be understood as the smallest light-emitting unit in the display panel 10. The peripheral area B can house the circuit structure.

[0078] Please continue reading. Figure 3 The display area AA may include multiple sub-pixels P, which may be arranged in multiple rows and columns, for example. Each column includes at least two sub-pixels P arranged along a first direction X, and each row includes at least two sub-pixels P arranged along a second direction Y. The first direction X intersects the second direction Y, for example, the first direction X is perpendicular to the second direction Y.

[0079] In some embodiments, see Figure 4 The backlight module 30 includes a light strip 310 and a light guide plate 320. The light guide plate 320 is disposed on the non-display side 10B of the display panel 10 and is opposite to the display panel 10. The light guide plate 320 can be a flat plate or a wedge-shaped plate. Figure 4 The light guide plate 320 is illustrated as a flat plate, but the embodiments disclosed herein are not limited to this. The material of the light guide plate 320 may include, for example, styrene-methyl methacrylate, but the embodiments disclosed herein are not limited to this.

[0080] In addition, the light strip 310 can be disposed on the periphery of the light guide plate 320, that is, the light-emitting side of the light strip 310 is opposite to the side 321 of the light guide plate 320. In this way, the light strip 310 does not need to be disposed in the thickness direction of the display device 1000, which is beneficial to reduce the thickness of the display device 1000. However, the embodiments disclosed herein are not limited to this.

[0081] For example, such as Figure 3 and Figure 4 As shown, along the second direction Y, the light strip 310 is disposed on one side of the light guide plate 320. Of course, along the second direction Y, the light strip 310 can also be disposed on opposite sides of the light guide plate 320, and / or, along the first direction X, the light strip 310 is disposed on at least one side of the light guide plate 320.

[0082] Below, along the second direction Y, the light strip 310 is disposed on one side of the light guide plate 320 ( Figure 3 Taking the lower side of the middle as an example, some embodiments of this disclosure are illustrated, but the implementation of this disclosure is not limited thereto.

[0083] Please continue reading. Figure 4 The light strip 310 may include, for example, a substrate 311 and a light source 312, with the light source 312 disposed on the side 321 of the substrate 311 and the light guide plate 320 (see...). Figure 6 Between the light guide plate 320 and the display panel 10. The light source 312 can be, for example, a light-emitting diode (LED). In addition, the backlight module 30 may also include a reflective sheet 330, which is disposed on the side of the light guide plate 320 away from the display panel 10, so as to reflect the light emitted from the surface of the light guide plate 320 away from the display panel 10, thereby increasing the light emission efficiency.

[0084] Please continue reading. Figure 4 The backlight module 30 also includes a backplate 340, which includes a base plate 341 and a side plate 342. The side plate 342 is disposed on one side of the base plate 341 and is arranged circumferentially around the base plate 341 to form an assembly space S. The light guide plate 320 and the lamp strip 310 are disposed within the assembly space S, and the side 321 of the light guide plate 320 (see...) Figure 6 The backlight module 30 is disposed opposite to the side panel 342. In addition, the backlight module 30 may also include an adhesive layer 313, through which the light strip 310 is connected to the side panel 342.

[0085] Combination Figure 4 and Figure 5 The backlight module 30 may further include a mid-frame 350 and an optical film 360. The optical film 360 is disposed between the light guide plate 320 and the display panel 10. The mid-frame 350 is arranged circumferentially around the light guide plate 320 and partially located between the optical film 360 and the display panel 10 to position and fix the light guide plate 320 and the optical film 360, and to ensure that the display panel 10 and the optical film 360 have a predetermined light mixing distance. The optical film 360 may, for example, include a diffuser and / or a brightness enhancement film. The brightness enhancement film may, for example, include a prism film (BEF) and a dual brightness enhancement film (DBEF), which can be used in combination.

[0086] For example, such as Figure 4 and Figure 5 As shown, the backlight module 30 may further include a first elastic support member 371, which is disposed between the middle frame 350 and the display panel 10 to support the display panel 10 and provide a light mixing distance. Figure 4 As shown, the backlight module 30 may further include a second elastic support 372. The second elastic support 372 is disposed between the middle frame 350 and the optical film 360, and is located on the side of the light guide plate 320 near the lamp strip 310, to position and fix the optical film 360 and the light guide plate 320, reducing the risk of lamp explosion caused by misalignment between the light source 312 and the light guide plate 320. In addition, both the first elastic support 371 and the second elastic support 372 may include black foam, which has a better cushioning and shock absorption effect and can reduce the risk of light leakage from the periphery of the display device 1000.

[0087] In some embodiments, see Figures 7A-14The backlight module 30 also includes an elastic element 380, which includes a support portion 381 and a first positioning portion 382. The first positioning portion 382 is disposed on the side of the support portion 381 away from the base plate 341, and the support portion 381 and the first positioning portion 382 are connected. For example, the first positioning portion 382 is integrally formed with the support portion 381.

[0088] Among them, combined Figure 7A , Figure 7B , Figure 7C and Figure 8 A support portion 381 is disposed between the light guide plate 320 and the base plate 341 to provide support for the light guide plate 320. The side plate 342 has an opening H, and the first positioning portion 382 is located at the opening H, facilitating the installation of the elastic member 380. Furthermore, the orthographic projection of the first positioning portion 382 onto the reference plane is within the range of the orthographic projection of the opening H onto the reference plane. The reference plane is the side surface 321 of the light guide plate 320 opposite to the first positioning portion 382. That is, the end face of the first positioning portion 382 does not exceed the end face of the opening H, meaning that the first positioning portion 382 is not located between the side plate 342 and the side surface 321 of the light guide plate 320.

[0089] Furthermore, at least a portion of the support 381 can be offset from the opening H, and the portion of the support 381 offset from the opening H abuts against the side plate 342. This allows the position of the elastic element 380 to be defined through the cooperation of the support 381, the side plate 342, and the light guide plate 320, resulting in better structural stability. For example, see... Figure 7A , Figure 7B and Figure 7C In the orthographic projection onto the base plate 341, the length of the opening H is less than the length of the support portion 381. This allows the portion of the support portion 381 extending beyond the opening H to abut against the side plate 342, resulting in a simple structure. Alternatively, the elastic element 380 and the back plate 340 can also be connected and fixed by adhesive bonding. It should be noted that in the orthographic projection onto the base plate 341, the length of the first positioning portion 382 refers to its length in the extending direction of the side plate 342, and the length of the opening H refers to its length in the extending direction of the side plate 342.

[0090] Based on this, such as Figure 7A , Figure 7B , Figure 7C and Figure 8As shown, the first positioning part 382 abuts against the light guide plate 320 to position the light guide plate 320. Specifically, in the fourth direction Z2, the thickness of the first positioning part 382 is greater than the thickness of the side plate 342, and the fourth direction Z2 is perpendicular to the surface of the light guide plate 320 against which the first positioning part 382 abuts. This design allows for a gap between the light guide plate 320 and the side plate 342, resulting in a simple structure. Furthermore, when the light guide plate 320 expands and deforms due to heat, the first positioning part 382 can elastically deform under the pressure of the light guide plate 320, providing expansion space for the light guide plate 320 and preventing the light guide plate 320 from arching or denting due to thermal expansion and pressure, which would lead to a decrease in light output efficiency.

[0091] In addition, the first positioning part 382 and the light strip 310 are located on different sides of the light guide plate 320 to avoid interference between the first positioning part 382 and the light strip 310.

[0092] In this case, since the first positioning part 382 is not located between the side plate 342 and the side surface 321 of the light guide plate 320, the bezel width of the display device 1000 can be reduced by eliminating the thickness of the side plate 342. The bezel width of the display device 1000 satisfies the following formula:

[0093] W LCM ≥T0+D LGP～AA +T MF +T b +Gap Total .

[0094] Among them, W LCM The bezel width of the display device 1000 is T0, the thickness of the first positioning part 382 in the fourth direction Z2 is D. LGP～AA T is the distance between the boundary of the light guide plate 320 and the boundary of the display area AA. MF T represents the thickness of the mid-frame 350 in the fourth direction Z2. b For the thickness of the front frame, Gap Total This is the sum of the gaps between all components in the fourth direction Z2. It should be noted that, excluding the front bezel, T... b That is, 0.

[0095] Based on the above formula, it can be seen that the bezel width of the display device 1000 does not need to take into account the thickness of the side plate 342. Therefore, the first positioning part 382 is not located between the side plate 342 and the side surface 321 of the light guide plate 320, which can reduce the bezel width of the display device 1000. For example, taking the display device 1000 as a rectangle, that is, the orthographic projection of the light guide plate 320 on the base plate 341 is a rectangle, and the lamp strip 310 is disposed on one side of the light guide plate 320 along the second direction Y, in the first direction X, T0 is 1.4mm, DLGP～AA It is 2mm, T MF It is 0.7mm, Gap Total It is 0.2mm, W LCM It can reach 516.64mm.

[0096] It should be noted that T0 is the thickness of the first positioning part 382 in the fourth direction Z2. The specific thickness can be designed according to the position and hardness of the first positioning part 382 and the expansion of the light guide plate 320. For details, please refer to the following text.

[0097] Furthermore, with the bezel width of the display device 1000 remaining unchanged, the thermal expansion of the light guide plate 320 can be increased, and the reliability test temperature can be designed to be higher. In this case, the highest temperature the light guide plate 320 can withstand can be, for example, a first preset temperature, which is, for example, the temperature for the reliability test. The lowest temperature the light guide plate 320 can withstand can be, for example, a second preset temperature, which can be, for example, a preset room temperature, such as the temperature of the production workshop. Taking the display device 1000 as a rectangle, i.e., the orthographic projection of the light guide plate 320 on the base plate 341 is a rectangle, and the lamp strip 310 is disposed on one side of the light guide plate 320 along the second direction Y, the temperature difference between the first preset temperature and the second preset temperature satisfies the following formula:

[0098]

[0099] Where ΔT is the temperature difference between the first preset temperature and the second preset temperature, T BC For a backplate thickness of 340, H L L represents the hardness of the portion of the elastic element 380 located on one side of the light guide plate 320 in the first direction X (such as the first positioning portion 382). LGP W is the length of the light guide plate 320 in the first direction X. LGP ε is the width of the light guide plate 320 in the second direction Y, ε is the coefficient of thermal expansion of the light guide plate 320, and T is the width of the light guide plate 320 in the second direction Y. D H is the thickness of the portion of the elastic element 380 located between the light guide plate 320 and the light strip 310 (as mentioned below, the second positioning portion 382 of the third elastic element 3830). U H represents the hardness of the portion of the elastic element 380 located on the side of the light guide plate 320 away from the light strip 310 in the second direction Y (as mentioned below, the first sub-part 3821). D The hardness of the portion of the elastic element 380 located between the light guide plate 320 and the light strip 310 (the second positioning portion 382 of the third elastic element 3830 mentioned below).

[0100] In some embodiments, see Figure 7A , Figure 7B and Figure 7CIn the orthographic projection onto the base plate 341, the length of the opening H is greater than or equal to the length of the first positioning part 382. For example, in the orthographic projection onto the base plate 341, the length of the opening H is equal to the length of the first positioning part 382, ​​that is, the boundary of the orthographic projection of the opening H onto the opposite side surface 321 (reference surface) coincides with the boundary of the orthographic projection of the corresponding first positioning part 382 (the first positioning part 382 located at the opening H) onto the opposite side surface 321. In this way, the end face of the first positioning part 382 fits against the end face of the side plate 342 at the opening H, which can reduce the risk of light leakage. Of course, there can also be a gap between the end face of the first positioning part 382 and the end face of the side plate 342 at the opening H. It should be noted that in the orthographic projection onto the base plate 341, the length of the first positioning part 382 refers to the length of the first positioning part 382 in the extending direction of the side plate 342, and the length of the opening H refers to the length of the opening H in the extending direction of the side plate 342.

[0101] In some embodiments, see Figure 4 and Figure 6 Side 321 includes a first side 321A and a second side 321B, side plate 342 includes a first side plate 342A and a second side plate 342B, light strip 310 is located between the first side plate 342A and the first side 321A, and each second side plate 342B is disposed opposite to one second side 321B. Figures 7A-14 Each second side plate 342B has an opening H, so that on any second side plate 321B of the light guide plate 320, there is an elastic element 380 abutting, so as to provide good support and positioning fixation for the light guide plate 320.

[0102] For example, when the orthographic projection of the light guide plate 320 onto the base plate 341 is rectangular, the side 321 of the light guide plate 320 may include a first side 321A and three second side 321B, and the side plate 342 may include a first side plate 342A and three second side plates 342B. Of course, the embodiments disclosed herein are not limited to this.

[0103] The following example illustrates some embodiments of the present disclosure, with the light guide plate 320 having a first side 321A and three second side 321B, and the side plate 342 having a first side plate 342A and three second side plates 342B. However, the implementation of the present disclosure is not limited thereto.

[0104] In some embodiments, such as Figure 7A , Figure 7B , Figure 7C and Figure 8As shown, the opening H includes a first opening H1, and the elastic member 380 includes a first elastic member 3810 located at the first opening H1. The second side plate 342B includes a plurality of first sub-plates 3421, which are spaced apart, and the first opening H1 is formed between two adjacent first sub-plates 3421. The first positioning portion 382 of the first elastic member 3810 abuts against a second side surface 321B. At this time, along the third direction Z1, the first opening H1 can be formed by a recess in the second side plate 342B, for example, where the third direction Z1 is a direction perpendicular to the bottom plate 341. The first opening H1 can completely penetrate the second side plate 342B, or it can penetrate a portion of the second side plate 342B.

[0105] For example, such as Figure 7A and Figure 7B As shown, along the third direction Z1, the first opening H1 penetrates the second side plate 342B, and the first opening H1 is formed between two adjacent first sub-plates 3421 and the bottom plate 341. Or, as Figure 7A and Figure 7C As shown, along the third direction Z1, the first opening H1 penetrates the second side plate 342B. The second side plate 342B also includes a second sub-plate 3422. A second sub-plate 3422 is provided between two adjacent first sub-plates 3421, and the first opening H1 is formed between two adjacent first sub-plates 3421 and second sub-plate 3422.

[0106] The orthographic projection of the first positioning part 382 of the first elastic member 3810 on the opposite side 321 is within the range of the orthographic projection of the opening H on the opposite side 321. That is, the orthographic projection of the first positioning part 382 of the first elastic member 3810 on the opposite second side 321B is within the range of the orthographic projection of the first opening H1 on the opposite second side 321B.

[0107] In this case, the first elastic member 3810 is disposed on one side of the second side 321B of the light guide plate 320. The first positioning part 382 of the first elastic member 3810 can only abut against one second side 321B of the light guide plate 320. In this way, the light guide plate 320 can expand in the direction close to the first elastic member 3810. Moreover, the structure of the first elastic member 3810 is relatively simple and easy to manufacture.

[0108] It should be noted that one or more first elastic elements 3810 can be provided on one side of each second side 321B of the light guide plate 320, and the number of the first elastic elements 3810 can be set according to the actual situation.

[0109] In some embodiments, such as Figure 9 , Figure 10 and Figure 11As shown, opening H includes a second opening H2, and elastic member 380 includes a second elastic member 3820 located at the second opening H2. At the corners of two adjacent second side plates 342B, along the third direction Z1, the two adjacent second side plates 342B are recessed to form the second opening H2. The first positioning portion 382 of the second elastic member 3820 abuts against both adjacent second side plates 321B. At this time, along the third direction Z1, the second opening H2 can completely penetrate the second side plate 342B, or it can penetrate a portion of the second side plate 342B.

[0110] The second opening H2 includes a first sub-opening H21 and a second sub-opening H22 that are connected to each other. The first sub-opening H21 and the second sub-opening H22 are respectively disposed opposite to the two adjacent second side surfaces 321B. The second elastic member 3820 includes a first sub-elastic member 3820A and a second sub-elastic member 3820B that are connected to each other. The first positioning part 382 of the first sub-elastic member 3820A and the first positioning part 382 of the second elastic member 3820B abut against the two adjacent second side surfaces 321B respectively.

[0111] At this time, the orthographic projection of the first positioning part 382 of the second elastic member 3820 on the opposite second side 321B is located within the range of the orthographic projection of the first opening H1 on the opposite second side 321B. That is, the orthographic projection of the first positioning part 382 of the first sub-elastic member 3820A on the opposite second side 321B is located within the range of the orthographic projection of the first sub-opening H21 on the opposite second side 321B, and the orthographic projection of the first positioning part 382 of the second sub-elastic member 3820B on the opposite second side 321B is located within the range of the orthographic projection of the second sub-opening H22 on the opposite second side 321B.

[0112] In this configuration, the second elastic member 3820 is positioned at the corner of the light guide plate 320 away from the lamp strip 310. The first positioning portion 382 of the second elastic member 3820 can abut against the two second side surfaces 321B of the light guide plate 320. This allows the two second side surfaces 321B of the light guide plate 320 to expand towards the second elastic member 3820, and enables the abutment of all the second side surfaces 321B of the light guide plate 320 with fewer second elastic members 3820, providing better positioning and fixing. Furthermore, the second elastic member 3820 is located at the second opening H2, i.e., at the corner of two adjacent second side plates 342B. The limiting effect of the two second side plates 342B facilitates the installation and fixing of the second elastic member 3820.

[0113] In some embodiments, such as Figure 12 , Figure 13 and Figure 14As shown, the opening H includes a third opening H3, and the elastic member 380 includes a third elastic member 3830 located in the third opening H3. At the corner of adjacent first side plates 342A and second side plates 342B, along the third direction Z1, adjacent first side plates 342A and second side plates 342B are recessed to form the third opening H3, and the first positioning portion 382 of the third elastic member 3830 abuts against a second side surface 321B. At this time, along the third direction Z1, the third opening H3 can completely penetrate the second side plate 342B, or it can penetrate part of the second side plate 342B.

[0114] The orthographic projection of the first positioning part 382 of the third elastic member 3830 on the opposite side 321 is within the range of the orthographic projection of the opening H on the opposite side 321. That is, the orthographic projection of the first positioning part 382 of the third elastic member 3830 on the opposite second side 321B is within the range of the orthographic projection of the third opening H3 on the opposite second side 321B.

[0115] Based on this, the third elastic member 3830 also includes a second positioning part 383, which is disposed on the side of the support part 381 away from the base plate 341, and the support part 381 is also connected to the second positioning part 383. For example, the first positioning part 382, ​​the second positioning part 383 and the support part 381 are integrally formed. The second positioning part 383 abuts against the substrate 311 and the first side surface 321A.

[0116] In this configuration, the third elastic member 3830 is positioned at the corner of the light guide plate 320 near the lamp strip 310. The first positioning portion 382 of the third elastic member 3830 can abut against a second side surface 321B of the light guide plate 320, and the second positioning portion 383 can abut against the first side surface 321A of the light guide plate 320. This allows the light guide plate 320 to expand towards the lamp strip 310. By designing the maximum expansion and contraction amount of the second positioning portion 383, the amount of expansion of the light guide plate 320 towards the lamp strip 310 can be limited, preventing the risk of the light guide plate 320 exploding due to pressure between itself and the light source 312. Furthermore, the third elastic member 3830 is located at the third opening H3, and its installation and fixation are facilitated by the lamp strip 310 and the second side plate 342B.

[0117] Any two or three of the aforementioned first elastic element 3810, second elastic element 3820, and third elastic element 3830 can be combined in a suitable manner. For example, if the orthographic projection of the light guide plate 320 onto the base plate 341 is rectangular, and the backlight module 30 includes two second elastic elements 3820 and two third elastic elements 3830, then the thickness of one side plate 342 can be reduced for the display device 1000 corresponding to the frame without the light strip 310.

[0118] The following uses the example of a rectangular projection of the light guide plate 320 onto the base plate 341, and the backlight module 30 including two second elastic members 3820 and two third elastic members 3830, to illustrate the thickness of the second elastic member 3820 and the third elastic member 3830 in some embodiments of this disclosure. However, the embodiments of this disclosure are not limited thereto.

[0119] For example, see Figure 9 , Figure 10 and Figure 11 The first positioning portion 382 of the second elastic member 3820 includes a first sub-portion 3821 and a second sub-portion 3822 connected to each other. Along the first direction X, the second sub-portion 3822 is located on one side of the light guide plate 320. Along the second direction Y, the first sub-portion 3821 is located on one side of the light guide plate 320.

[0120] At this time, the thickness of the first sub-part 3821 and the thickness of the second positioning part 383 of the third elastic member 3830 satisfy the following formula:

[0121] T D ×H D ≤Gap LGP～LED .

[0122] T U ×H U +T D ×H D ≥k1W+b1;

[0123] The T U For the thickness of the first sub-section 3821, T D H is the thickness of the second positioning part 383 of the third elastic member 3830. U The hardness of the first sub-part is 3821, H D The hardness of the second positioning part 383 of the third elastic element 3830 is Gap LGP～LED W is the distance between the light guide plate 320 and the light source 312, and W is the width of the light guide plate 320 in the second direction Y.

[0124] Where, k1=ε×ΔT, b1=σ-ω, that is, T U ×H U +T D ×H D ≥W×ε×ΔT+σ-ω. k1 can be, for example, 0.002~0.004, and b1 can be, for example, 0.16mm~1.32mm.

[0125] ε is the coefficient of thermal expansion of the light guide plate 320, ΔT is the temperature difference between the first preset temperature and the second preset temperature, σ is the dimensional tolerance of the elastic element 380, and ω is the deformation of the back plate 340 after changing from the second preset temperature to the first preset temperature. For example, TD It is 0.85mm, H D 76HB, Gap LGP～LED It is 0.2mm. T U It is 1.8mm, H U The value is 45HB, W is 325.7mm, and ε is 7.67×10. - 5 mm / ℃, ΔT is 35℃, σ is 0.32mm, and ω is 0.168mm.

[0126] At this time, the thickness of the second sub-part 3822 and the thickness of the first positioning part 382 of the third elastic member 3830 satisfy the following formula:

[0127] T R =k2L+b2.

[0128] The T R L is the thickness of the second sub-part 3822 or the thickness of the first positioning part 382 of the third elastic member 3830, and L is the length of the light guide plate 320 in the first direction X.

[0129] in, Right now, For example, k2 can be 0.001 to 0.01, and b2 can be -1.2 mm to 0.7 mm.

[0130] The H R ε is the hardness of the second sub-part 3822 or the hardness of the first positioning part 382 of the third elastic element 3830; ε is the coefficient of thermal expansion of the light guide plate 320; ΔT is the temperature difference between the first preset temperature and the second preset temperature; σ is the dimensional tolerance of the elastic element 380; and ω is the amount of deformation of the back plate 340 after changing from the second preset temperature to the first preset temperature. For example, T R It is 1.4mm, H R The value is 50 HB, L is 516.64 mm, and ε is 7.67 × 10⁻⁶. -5 mm / ℃, ΔT is 35℃, σ is 0.32mm, and ω is 0.168mm.

[0131] In some embodiments, see Figure 4 and Figure 5 The middle frame 350 has a groove on the side near the base plate 341, and the side plate 342 away from the base plate 341 engages with the groove to fix the middle frame 350. In addition, the side plate 342 may also be provided with an elastic buckle 3420, which can be formed by cutting and bending the side plate 342. The middle frame 350 may be provided with a slot, and the elastic buckle 3420 engages with the slot to fix the middle frame 350.

[0132] Based on this, the elastic member 380 also includes a snap-fit ​​portion 384, which is disposed on the side of the first positioning portion 382 away from the support portion 381, and the snap-fit ​​portion 384 is connected to the first positioning portion 382. For example, the snap-fit ​​portion 384, the first positioning portion 382, ​​and the support portion 381 are integrally formed. The snap-fit ​​portion 384 engages with a groove, thus increasing the structural stability of the middle frame 350 through the two snap-fit ​​points of the back plate 340 and the elastic member 380. Here, the thickness of the snap-fit ​​portion 384 can, for example, be equal to the thickness of the side plate 342.

[0133] Furthermore, when the backlight module 30 includes a second elastic member 3820, the second elastic member 3820 includes two latching portions 384, which are spaced apart and face adjacent second side surfaces. This allows the middle frame 350 to be limited by the area between the two latching portions 384, further increasing the structural stability of the middle frame 350. The spaced-apart and opposite structure of the two latching portions 384 simplifies its fabrication. Alternatively, the two latching portions 384 can be directly connected.

[0134] In some embodiments, such as Figure 4 and Figure 5 As shown, the display module 100 may further include an optical adhesive 50 and a touch layer 60. The touch layer 60 is disposed on the side of the display panel 10 away from the backlight module 30, so that the display device 1000 can realize human-computer interaction through touch. The optical adhesive 50 is disposed between the touch layer 60 and the display panel 10, so that the touch layer 60 and the display panel 10 are connected and fixed by adhesive.

[0135] In some embodiments, see Figure 4 The middle frame 350 includes a first border 351, which abuts against the first side panel 342A. Along the direction from the first side panel 342A to the first side surface 321A, the distance between the first border 351 and the touch layer 60 decreases sequentially on the side away from the bottom plate 341, forming multiple steps ST.

[0136] Among the multiple steps ST, the step ST with the largest distance from the touch layer 60 is the first step ST1, and the first elastic support 371 is disposed on the side of the first step ST1 away from the base plate 341. Among the multiple steps ST, the step ST with the smallest distance from the touch layer 60 is the second step ST2, the second step ST2 is offset from the display panel 10, and is at least partially opposite to the touch layer 60.

[0137] In addition, see Figure 5The middle frame 350 may also include a second border 352, which abuts against the second side panel 342B. Along the direction from the second side panel 342B to the opposite second side panel 321B, the second border 352 is equidistant from the touch layer 60 on the side away from the bottom plate 341.

[0138] Based on this, the distance between the surface of the second step ST2 away from the base plate 341 and the surface of the display panel 10 away from the base plate 341 satisfies the following formula:

[0139] H+T O ≥T S ×ρ P .

[0140]

[0141] Where H is the distance between the surface of the second step ST2 away from the base plate 341 and the surface of the display panel 10 away from the base plate 341, and T is the distance between the surface of the second step ST2 away from the base plate 341 and the surface of the display panel 10 away from the base plate 341. O For an optical adhesive thickness of 50, T S The thickness of the first elastic support 371 is given by P1, where P1 is the preset pressure and ρ is the thickness of the first elastic support 371. P M is the compression ratio of the first elastic support 371 under a preset pressure, where M is the compression ratio of the first elastic support 371 (e.g., ...). Figure 4 The weight of the components supported by the first elastic support 371 (all components on the upper side of the first elastic support 371), S is the contact area between the first elastic support 371 and the display panel 10, and P2 is the pressure applied during the bonding process between the display panel 10 and the first elastic support 371. Here, the preset pressure P1 is the total pressure experienced by the first elastic support 371 during the bonding process.

[0142] At this time, during the process of the display panel 10 equipped with the touch layer 60 being attached to the first elastic support 371, the compression amount of the first elastic support 371 is less than the distance between the surface of the second step ST2 away from the base plate 341 and the touch layer 60, thereby avoiding the risk of damage to the touch layer 60 caused by the extrusion force generated between the second step ST2 and the touch layer 60.

[0143] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0144] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A backlight module, characterized in that, include: The back panel includes a bottom plate and a side plate, wherein the side plate is disposed on one side of the bottom plate and is arranged around the bottom plate in a circumferential manner to form an assembly space; The side panel has an opening; A light guide plate is disposed in the assembly space; the light guide plate includes a side surface disposed opposite to the side plate. A light strip is disposed between the light guide plate and the side plate, with the light-emitting side of the light strip facing the side of the light guide plate; Elastic elements, including: A support portion is disposed between the light guide plate and the base plate; A first positioning part is disposed on the side of the support part away from the base plate; the first positioning part is located at the opening, and the orthographic projection of the first positioning part on the reference surface is within the range of the orthographic projection of the opening on the reference surface; the reference surface is the side of the light guide plate opposite to the first positioning part; the first positioning part and the light strip are located on different sides of the light guide plate and abut against the light guide plate.

2. The backlight module according to claim 1, characterized in that, In the orthographic projection onto the base plate, the length of the opening is greater than or equal to the length of the first positioning part; and / or, the length of the opening is less than the length of the support part.

3. The backlight module according to claim 1, characterized in that, The side includes a first side and a second side, the side plate includes a first side plate and a second side plate, the light strip is located between the first side plate and the first side, each second side plate is disposed opposite to a second side, and each second side plate is provided with the opening.

4. The backlight module according to claim 3, characterized in that, The opening includes a first opening, and the elastic element includes a first elastic element located in the first opening; Along a third direction, the first opening penetrates the second side plate, and the third direction is a direction perpendicular to the bottom plate; the second side plate includes a plurality of first sub-plates, the plurality of first sub-plates are spaced apart, and the first opening is formed between two adjacent first sub-plates; the first positioning part of the first elastic member abuts against a second side surface; Alternatively, along a third direction, the first opening penetrates the second side plate, the third direction being a direction perpendicular to the bottom plate; the third direction being a direction perpendicular to the bottom plate; the second side plate includes a plurality of first sub-plates and second sub-plates, the plurality of first sub-plates being spaced apart, and a second sub-plate being provided between two adjacent first sub-plates, and the first opening being formed between two adjacent first sub-plates and the second sub-plate; the first positioning part of the first elastic member abuts against a second side surface.

5. The backlight module according to claim 3, characterized in that, The opening includes a second opening, and the elastic element includes a second elastic element located in the second opening; At the corners of two adjacent second side plates, along a third direction, the two adjacent second side plates are recessed to form the second opening, and the third direction is a direction perpendicular to the bottom plate; the first positioning part of the second elastic member abuts against the two adjacent second side plates.

6. The backlight module according to claim 5, characterized in that, The opening includes a third opening, and the elastic element includes a third elastic element located in the third opening; At the corner of the adjacent first side plate and the second side plate, along the third direction, the adjacent first side plate and the second side plate are recessed to form the third opening; the first positioning part of the third elastic member abuts against one of the second side surfaces.

7. The backlight module according to claim 6, characterized in that, The light strip includes a substrate and a light source, wherein the light source is disposed between the substrate and the first side surface; The third elastic element also includes: The second positioning part is disposed on the side of the support part away from the base plate; the second positioning part abuts against the base plate and the first side surface.

8. The backlight module according to claim 7, characterized in that, The orthographic projection of the light guide plate onto the base plate is rectangular. The first positioning portion of the second elastic member includes a first sub-part and a second sub-part connected together. Along the first direction, the second sub-part is located on one side of the light guide plate; along the second direction, the first sub-part is located on one side of the light guide plate; the second direction is perpendicular to the first side, the first direction is perpendicular to the second direction, and parallel to the base plate. The thickness of the first sub-part and the thickness of the second positioning part of the third elastic member satisfy the following formula: ； ； The thickness of the first sub-part. The thickness of the second positioning portion of the third elastic member. The hardness of the first sub-part. The hardness of the second positioning portion of the third elastic element. The distance between the light guide plate and the light source. The width of the light guide plate in the second direction. The value is between 0.002 and 0.

004. The thickness ranges from 0.16mm to 1.32mm.

9. The backlight module according to claim 7, characterized in that, The orthographic projection of the light guide plate onto the base plate is rectangular. The first positioning portion of the second elastic member includes a first sub-part and a second sub-part connected to each other. Along a first direction, the second sub-part is located on one side of the light guide plate; along a second direction, the first sub-part is located on one side of the light guide plate; the second direction is perpendicular to the first side; the first direction is perpendicular to the second direction and parallel to the base plate. The thickness of the second sub-part and the thickness of the first positioning part of the third elastic member satisfy the following formula: ； in, The thickness is either the thickness of the second sub-part or the thickness of the first positioning part of the third elastic member. The length of the light guide plate in the first direction is... It is 0.001~0.01; The range is -1.2mm to 0.7mm.

10. The backlight module according to claim 1, characterized in that, The thickness of the first positioning part is greater than the thickness of the side plate.

11. The backlight module according to claim 1, characterized in that, At least a portion of the support is offset from the opening, and the portion of the support that is offset from the opening abuts against the side plate.

12. The backlight module according to any one of claims 1 to 11, characterized in that, Also includes: The middle frame is arranged circumferentially around the light guide plate; a groove is provided on the side of the middle frame near the bottom plate, and the end of the side plate away from the bottom plate is engaged with the groove; the elastic member also includes a snap-fit ​​part, which is disposed on the side of the first positioning part away from the support part, and the snap-fit ​​part is engaged with the groove.

13. The backlight module according to claim 12, characterized in that, The thickness of the snap-fit ​​portion is equal to the thickness of the side plate.

14. The backlight module according to claim 12, characterized in that, The opening includes a second opening, and the elastic element includes a second elastic element located at the second opening; the side includes a first side and a second side, the side plate includes a first side plate and a second side plate, the light strip is located between the first side plate and the first side, each second side plate is disposed opposite to one second side, and at the corner of two adjacent second side plates, along a third direction, the two adjacent second side plates are recessed to form a second opening, the third direction being a direction perpendicular to the bottom plate; the first positioning part of the second elastic element abuts against both adjacent second side plates; The second elastic member includes two locking portions, which are spaced apart and are respectively opposite to two adjacent second side surfaces.

15. A display module, characterized in that, include: The backlight module as described in any one of claims 1 to 14; The display panel is located on the side of the light guide plate away from the base plate.

16. The display module according to claim 15, characterized in that, The backlight module includes a mid-frame that surrounds the light guide plate circumferentially; the display module further includes: A first elastic support member is disposed between the middle frame and the display panel; A touch layer is disposed on the side of the display panel away from the backlight module; Optical adhesive is applied to the touch layer and the display panel.

17. The display module according to claim 16, characterized in that, The light guide plate includes a first side and a second side, the side plate includes a first side plate and a second side plate, the light strip is located between the first side plate and the first side, and each second side plate is disposed opposite to one of the second side plates; The middle frame includes: A first frame abuts against the first side panel; along the direction from the first side panel to the first side surface, the distance between the first frame and the touch layer decreases sequentially on the side away from the bottom plate, forming multiple steps; the step with the largest distance from the touch layer among the multiple steps is the first step, and the first elastic support member is disposed on the side of the first step away from the bottom plate; the step with the smallest distance from the touch layer among the multiple steps is the second step, and the second step is offset from the display panel and at least partially opposite to the touch layer; The second frame abuts against the second side panel; along the direction from the second side panel to the opposite second side, the side of the second frame away from the bottom plate is equidistant from the touch layer.

18. The display module according to claim 17, characterized in that, The distance between the surface of the second step away from the base plate and the surface of the display panel away from the base plate satisfies the following formula: ； ； in, The distance between the surface of the second step away from the base plate and the surface of the display panel away from the base plate. The thickness of the optical adhesive. The thickness of the first elastic support member, To preset the pressure, The compression ratio of the first elastic support member under the preset pressure. The weight of the component supported by the first elastic support member. The area of ​​contact between the first elastic support and the display panel. The pressure applied during the bonding process between the display panel and the first elastic support member.

19. A display device, characterized in that, include: The display module as described in any one of claims 15 to 18.

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