Backlight module and display device

Abstract

A backlight module (100) and a display device (1000). The backlight module (100) comprises a back frame (10), a light guide plate (20), and elastic members (30); the elastic members (30) are disposed in an accommodating groove (10a) of the back frame (10) and are located between a side wall (12) and the light guide plate (20); each elastic member (30) comprises an elastic body (31) and a first limiting portion (32); the first limiting portion (32) is connected to the side of the elastic body (31) close to a side connecting portion (2b) of the light guide plate (20); and in the thickness direction of the backlight module (100), the first limiting portion (32) is disposed on the side of the side connecting portion (2b) away from a bottom plate (11).

Description

Backlight module and display device

[0001] This application claims priority to Chinese Patent Application No. 202411112487.2, filed on August 13, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of display, in particular to a backlight module and a display device. BACKGROUND

[0003] In a high temperature test, the light guide plate in the backlight module expands due to high temperature, and then is displaced, causing the periphery of the light guide plate to be raised, affecting the light output effect. SUMMARY

[0004] The backlight module and the display device provided by the embodiments of the present application can reduce the risk of the light guide plate being raised.

[0005] In one aspect, the present application provides a backlight module, comprising:

[0006] A back frame comprising a bottom plate and a side wall, the side wall being arranged on the periphery of the bottom plate to form a receiving groove;

[0007] A light guide plate arranged on the bottom plate and located in the receiving groove, the light guide plate comprising a light output portion and a side connecting portion, the side connecting portion being connected to at least one side of the light output portion;

[0008] An elastic member arranged in the receiving groove and located between the side wall and the light guide plate, the elastic member comprising an elastic body and a first limiting portion, the first limiting portion being connected to one side of the elastic body close to the side connecting portion;

[0009] In the thickness direction of the backlight module, the first limiting portion is arranged on the side of the side connecting portion away from the bottom plate.

[0010] In another aspect, the present application also provides a display device comprising a display panel and a backlight module as described in any one of the above embodiments, the display panel being arranged on the backlight module. BRIEF DESCRIPTION OF DRAWINGS

[0011] FIG. 1 is a plan view of a backlight module according to an embodiment of the present application;

[0012] FIG. 2 is a cross-sectional view of a backlight module according to an embodiment of the present application;

[0013] FIG. 3 is an enlarged view of portion A in FIG. 2;

[0014] FIG. 4 is a force decomposition diagram of FIG. 3;

[0015] FIG. 5 is a structural schematic diagram of a display device provided by an embodiment of the present application. Embodiments of the present application

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the embodiments can be combined with each other but are not described one by one, and the positional words such as "upper" and "lower" are generally used to refer to the upper and lower of the device in the actual use or working state, and the specific is the direction of the drawing surface in the drawings; and "inner" and "outer" are used in relation to the outline of the device; the words "first", "second", "third" and the like are only used as labels, and do not impose a numerical requirement or establish an order.

[0017] The present application provides a backlight module and a display device, which are described in detail below. It should be noted that the description order of the following embodiments is not limited as the preferred order of the embodiments.

[0018] In one aspect, the present application provides a backlight module, comprising:

[0019] A back frame comprising a bottom plate and a side wall, the side wall being arranged on the periphery of the bottom plate to form a receiving groove;

[0020] A light guide plate arranged on the bottom plate and located in the receiving groove, the light guide plate comprising a light emitting portion and a side connecting portion, the side connecting portion being connected to at least one side of the light emitting portion;

[0021] An elastic member arranged in the receiving groove and located between the side wall and the light guide plate, the elastic member comprising an elastic body and a first limiting portion, the first limiting portion being connected to one side of the elastic body close to the side connecting portion;

[0022] In the thickness direction of the backlight module, the first limiting portion is arranged on the side of the side connecting portion away from the bottom plate.

[0023] In some embodiments of the present application, in the direction from the side wall to the light guide plate, the thickness of the first limiting portion decreases and the thickness of the side connecting portion increases.

[0024] In some embodiments of the present application, the first contact surface is one of a convex curved surface and a concave curved surface, and the limiting surface is the other of a convex curved surface and a concave curved surface, and the first contact surface and the limiting surface are complementarily arranged.

[0025] In some embodiments of the present application, the side connecting portion comprises a first contact surface, the first limiting portion comprises a limiting surface, the limiting surface and the first contact surface are in contact, and the first contact surface and the limiting surface are both inclined planes.

[0026] In some embodiments of the present application, the maximum height of the first contact surface is greater than the maximum height of the limiting surface, with reference to the side of the bottom plate close to the elastic member.

[0027] In some embodiments of the present application, the inclination angle of the first contact surface is between 30 degrees and 60 degrees, with reference to the side of the bottom plate close to the elastic member.

[0028] In some embodiments of the present application, the side connecting portion comprises a second contact surface connected to the first contact surface, and the second contact surface extends along the thickness direction of the backlight module.

[0029] The second contact surface and the elastic body are in contact.

[0030] In some embodiments of the present application, the light guide plate abuts against the elastic member, and the elastic member is in a compressed state.

[0031] In some embodiments of the present application, the backlight module further comprises a first adhesive layer connected to the side wall and the elastic body.

[0032] In some embodiments of the present application, the bottom plate further comprises a groove in communication with the accommodating groove, the groove is located in the edge region of the bottom plate, and part of the elastic member is arranged in the groove.

[0033] In the thickness direction of the backlight module, there is a buffer space between the light guide plate and the bottom of the groove.

[0034] In some embodiments of the present application, the back frame further comprises a second limiting portion connected to the side of the side wall close to the accommodating groove, and the second limiting portion is arranged above the elastic member.

[0035] In some embodiments of the present application, the width of the second limiting portion is greater than the width of the elastic body.

[0036] In some embodiments of the present application, in the thickness direction of the backlight module, the distance from the second limiting portion to the elastic member is less than or equal to 0.4 millimeters.

[0037] In some embodiments of the present application, the backlight module further comprises a reflective sheet, a second adhesive layer and a third adhesive layer, the reflective sheet is arranged on the side of the light guide plate close to the bottom plate, the second adhesive layer is connected between the light guide plate and the reflective sheet, and the third adhesive layer is connected between the reflective sheet and the bottom of the accommodating groove, and the third adhesive layer is located in the middle region of the accommodating groove.

[0038] In some embodiments of the present application, the back frame is an integrally formed structure.

[0039] In some embodiments of the present application, the side wall comprises a first side wall, a second side wall, a third side wall and a fourth side wall, the first side wall, the second side wall, the third side wall and the fourth side wall are connected end to end, the first side wall and the third side wall are oppositely arranged, the second side wall and the fourth side wall are oppositely arranged, the second side wall and the third side wall are connected to form a first corner, and the fourth side wall and the third side wall are connected to form a second corner.

[0040] The backlight module further comprises a light emitting source, the light emitting source is arranged in the accommodating groove and located between the light guide plate and the first side wall, the number of the elastic members comprises at least two, one of the elastic members is arranged at the first corner and extends along the extension direction of the first corner, and the other of the elastic members is arranged at the second corner and extends along the extension direction of the second corner.

[0041] In another aspect, the embodiments of the present application also provide a display device comprising a display panel and the backlight module according to any one of the above embodiments.

[0042] The backlight module of the embodiments of the present application adopts the elastic members arranged on one side of the light guide plate to buffer the deformation amount of the light guide plate due to high temperature expansion, thereby reducing the risk of the light guide plate being directly pressed against the side wall and causing damage to the light guide plate. In addition, in the thickness direction of the backlight module, the first limiting portion of the elastic member is located above the light guide plate, which can have the effect of pressing down the light guide plate, thereby reducing the risk of the light guide plate being warped due to high temperature expansion.

[0043] In FIGS. 1-3, the first direction F1 can be a direction parallel to one side of the backlight module 100 in a plan view, and for example, can be a transverse direction of the backlight module 100. The second direction F2 can be a direction parallel to the other side of the backlight module 100 in a plan view, and can be a longitudinal direction of the backlight module 100. The third direction F3 can be a thickness direction of the backlight module 100.

[0044] It should be understood that in FIG. 1, the first direction F1 and the second direction F2 are arranged perpendicularly, but are not limited thereto, for example, can intersect non-perpendicularly.

[0045] The backlight module 100 provided by the embodiments of the present application comprises a back frame 10, a light guide plate 20, an elastic member 30 and a light source 40.

[0046] The back frame 10 comprises a bottom plate 11 and a side wall 12, the side wall 12 is arranged on the circumferential side of the bottom plate 11 to form a receiving groove 10a. The light guide plate 20 is arranged on the bottom plate 11 and located in the receiving groove 10a. The elastic member 30 is arranged in the receiving groove 10a and located between the side wall 12 and the light guide plate 20. The light source 40 is arranged in the receiving groove 10a and located on one side of the light guide plate 20.

[0047] Please refer to FIG. 1, in some embodiments of the present application, the side wall 12 comprises a first side wall 121, a second side wall 122, a third side wall 123 and a fourth side wall 124. The first side wall 121, the second side wall 122, the third side wall 123 and the fourth side wall 124 are connected end to end, the first side wall 121 and the third side wall 123 are arranged oppositely, and the second side wall 122 and the fourth side wall 124 are arranged oppositely. The second side wall 122 and the third side wall 123 are connected to form a first corner g1, and the fourth side wall 124 and the third side wall 123 are connected to form a second corner g2.

[0048] Optionally, in some embodiments of the present application, the first side wall 121 and the third side wall 123 extend along the first direction F1, and the second side wall 122 and the fourth side wall 124 extend along the second direction.

[0049] The first corner g1 and the second corner g2 can be a rounded right-angle corner, but are not limited thereto, for example, can be a vertical right-angle corner or a rounded oblique right-angle corner.

[0050] The light source 40 is arranged in the receiving groove 10a and located between the light guide plate 20 and the first side wall 121. The number of the elastic member 30 comprises at least two, and the present application takes two elastic members 30 as an example for illustration, but is not limited thereto.

[0051] One elastic member 30 is arranged at the first corner g1 and extends along the extension direction of the first corner g1, and the other elastic member 30 is arranged at the second corner g2 and extends along the extension direction of the second corner g2.

[0052] It can be understood that the distance from the light guide plate 20 to the first side wall 121 is large, so that the thermal expansion amount of the light guide plate 20 to the first side wall 121 can be better buffered at high temperature, and the distance from the light guide plate 20 to the second side wall 122, the third side wall 123 and the fourth side wall 124 is small, so that the elastic member 30 needs to be arranged to buffer the thermal expansion amount of the light guide plate 20.

[0053] Secondly, the elastic member 30 is arranged at the first corner g1 and the second corner g2, which can buffer the thermal expansion amount of the light guide plate 20 to the second side wall 122, the third side wall 123 and the fourth side wall 124, and reduce the amount of the elastic member 30.

[0054] Please refer to FIG. 3, the light guide plate 20 includes a light emitting part 2a and a side connecting part 2b connected to at least one side of the light emitting part 2a. The elastic member 30 includes an elastic body 31 and a first limiting part 32 connected to one side of the elastic body 31 close to the side connecting part 2b.

[0055] In the thickness direction of the backlight module 100, the first limiting part 32 is arranged on the side of the side connecting part 2b away from the bottom plate 11.

[0056] The backlight module 100 of the embodiment of the application adopts the elastic member 30 arranged on one side of the light guide plate 20 to buffer the thermal expansion amount of the light guide plate 20 due to high temperature expansion, thereby reducing the risk of the light guide plate 20 directly pressing the side wall 12 and causing damage to the light guide plate 20. In addition, in the thickness direction F3 of the backlight module 100, the first limiting part 32 of the elastic member 30 is above the light guide plate 20, which can press down the light guide plate 20, thereby reducing the risk of the light guide plate 20 warping due to high temperature expansion.

[0057] In some embodiments of the application, the back frame 10 is an integrally formed structure. For example, the back frame 10 can be integrally formed by die casting. It can be understood that the integrally formed back frame 10 has better stability and reliability. However, it is not limited thereto, for example, the side wall 12 and the bottom plate 11 can form the back frame 10 by assembling.

[0058] Optionally, the material of the back frame 10 includes but is not limited to metal, metal alloy or plastic. For example, aluminum alloy, magnesium alloy, aluminum, etc.

[0059] In some embodiments of the application, the light guide plate 20 is a light-transmitting material with high light-transmitting property.

[0060] In some embodiments of the application, the elastic member 30 has elasticity, which can be formed of a flexible material or contain a flexible material, as long as it can achieve the elastic performance. Optionally, the material of the elastic member 30 includes but is not limited to rubber, silicone, foam or other organic resins, etc.

[0061] The elastic body 31 and the first limiting portion 32 are made of the same material and are integrally formed, but are not limited thereto. For example, the elastic body 31 and the first limiting portion 32 can also be assembled by physical connection. In this case, the elastic modulus of the first limiting portion 32 is greater than the elastic modulus of the elastic body 31, so that the first limiting portion 32 has relatively greater rigidity, which can better limit the upward expansion, warping or arching of the light guide plate 20, and the elastic body 31 is softer, which can better absorb the horizontal expansion amount of the light guide plate 20, thereby further reducing the risk of warping and arching of the light guide plate 20.

[0062] In some embodiments of the present application, the light emitting source 40 is a device having a light emitting function. For example, it can be an LED device or other lamp beads.

[0063] In some embodiments of the present application, the backlight module 100 can further include an optical film, which is arranged on the light emitting side of the light guide plate 20. The optical film includes at least one of a diffusion sheet and a brightening sheet.

[0064] In some embodiments of the present application, the thickness of the first limiting portion 32 decreases and the thickness of the side connecting portion 2b increases from the side wall 12 to the light guide plate 20.

[0065] That is, the side connecting portion 2b includes a first contact surface 2b1, and the first limiting portion 32 has a limiting surface 32a, and the limiting surface 32a and the first contact surface 2b1 are in contact.

[0066] With the side of the bottom plate 11 close to the elastic member 30 as a reference, the height of the first contact surface 2b1 and the height of the limiting surface 32a increase from the side wall 12 to the light guide plate 20.

[0067] It should be understood that the first contact surface 2b1 and the limiting surface 32a adopt a gradual contact, which can increase the contact area of the two on the basis of limiting the upward warping of the light guide plate 20, thereby improving the limiting performance of the first limiting portion 32. In addition, when the light guide plate 20 thermally expands, the light guide plate 20 exerts a pressing force on the elastic member 30, and the elastic member 30 also exerts a pressing force on the light guide plate 20. The gradual contact allows the pressing force to be decomposed to achieve a force unloading effect.

[0068] In some embodiments of the present application, with the side of the bottom plate 11 close to the elastic member 30 as a reference, the highest height of the first contact surface 2b1 is greater than the highest height of the limiting surface 32a. That is, the height of the light emitting portion 2a away from the surface of the substrate 11 is greater than the height of the first limiting portion 32 away from the surface of the substrate 11. Such a design can reduce the thickness of the first limiting portion 32, thereby saving space for arranging the elastic member 30.

[0069] In some embodiments of the present application, the first contact surface 2b1 and the limiting surface 32a are both inclined planes.

[0070] It should be noted that, as shown in FIG. 4, when the light guide plate 20 expands to the left and right, the light guide plate 20 exerts a pressing force on the elastic member 30, and due to the oblique plane contact between the two, the pressing force is decomposed into a first horizontal component H1 and a second vertical component V1, while the pressing force of the elastic member 30 on the light guide plate 20 can be decomposed into a third horizontal component H2 and a fourth vertical component V2, the first component H1 and the second component V1 are absorbed by the deformation of the elastic member 30 itself, and the fourth component V2 vertically presses the light guide plate 20, which can prevent the light guide plate 20 from being warped or arched.

[0071] In addition, in addition to the oblique plane contact between the first contact surface 2b1 and the limiting surface 32a, they can also be curved surface contact, such as the first contact surface 2b1 being one of a convex curved surface and a concave curved surface, the limiting surface 32a being the other one of a convex curved surface and a concave curved surface, and the first contact surface 2b1 and the limiting surface 32a being complementary.

[0072] It should be understood that, compared with the oblique plane contact, the arc-shaped curved surface contact can better decompose the acting force and improve the unloading effect. When the limiting surface 32a is a convex curved surface and the first contact surface 2b1 is a concave curved surface, the first limiting portion 32 is embedded into the light guide plate 20, which can better limit the light guide plate 20. Moreover, when the first contact surface 2b1 adopts a circular arc-shaped curved surface, the first contact surface 2b1 is a smooth surface and has certain reflection performance, which can achieve diffuse reflection and improve the light extraction efficiency.

[0073] In some embodiments of the present application, the inclination angle a of the first contact surface 2b1 is between 30 degrees and 60 degrees, with reference to the side of the bottom plate 11 close to the elastic member 30.

[0074] It can be understood that, the larger the inclination angle a of the first contact surface 2b1, the smaller the area of the light guide plate 20 that can be limited by the first limiting portion 32, the weaker the limiting ability of the first limiting portion 32 to the light guide plate 20, the smaller the area of the light guide plate 20 that is blocked, and the higher the light extraction efficiency; the smaller the inclination angle a of the first contact surface 2b1, the larger the area of the light guide plate 20 that can be limited by the first limiting portion 32, the stronger the limiting ability of the first limiting portion 32 to the light guide plate 20, the larger the area of the light guide plate 20 that is blocked, and the lower the light extraction efficiency.

[0075] Therefore, considering the limiting effect of the first limiting portion 32 on the light guide plate 20 and the light extraction effect of the light guide plate 20, the inclination angle a of the first contact surface 2b1 can be selected to be between 30 degrees and 60 degrees, such as 30 degrees, 35 degrees, 40 degrees, 45 degrees, 50 degrees, 55 degrees or 60 degrees.

[0076] In some embodiments of the present application, the side connecting portion 2b comprises a second contact surface 2b2 connected to the first contact surface 2b1, the second contact surface 2b2 extending along the thickness direction of the backlight module 100. The second contact surface 2b2 is in contact with the elastic body 31.

[0077] The second contact surface 2b2 is in contact with the elastic body 31, so that when the light guide plate 20 is thermally expanded, the contact area between the light guide plate 20 and the elastic member 30 is increased, and the elastic member 30 can better absorb the extrusion force. The second contact surface 2b2 is a vertical plane, which can avoid the light guide plate 20 having a sharp end, reducing the risk of damage to the light guide plate 20, and also reducing the risk of the sharp end of the light guide plate 20 extruding the elastic member 30 and causing the elastic member 30 to break.

[0078] In some embodiments of the present application, the light guide plate 20 abuts against the elastic member 30, and the elastic member 30 is in a compressed state.

[0079] The light guide plate 20 abuts against the elastic member 30, and the elastic member 30 is compressed by the light guide plate 20. The light guide plate 20 abutting against the elastic member 30, i.e., the light guide plate 20 and the elastic member 30 are in interference fit, can improve the reliability of the fixation of the light guide plate 20 and reduce the risk of movement deviation of the light guide plate 20. In addition, it should be noted that the light guide plate 20 can also be in contact with the elastic member 30, and the elastic member 30 maintains the original state, and the light guide plate 20 abuts against the elastic member 30 only when the light guide plate 20 is thermally expanded.

[0080] In some embodiments of the present application, the backlight module 100 further comprises a first adhesive layer 51, and the first adhesive layer 51 is connected to the side wall 12 and the elastic body 31.

[0081] The elastic member 30 is fixedly connected to the side wall 12 by the first adhesive layer 51, and the side of the elastic member 30 facing the bottom plate 11 has the ability to freely deform. When the light guide plate 20 extrudes the elastic member 30, the elastic member 30 as a whole can freely contract towards the side wall 12, facilitating the elastic member 30 to better absorb the extrusion force of the light guide plate 20.

[0082] In some embodiments of the present application, the bottom plate 11 further comprises a recess 10b communicating with the accommodating groove 10a, the recess 10b is located at the edge region of the bottom plate 11, and part of the elastic member 30 is arranged in the recess 10b.

[0083] In the thickness direction of the backlight module 100, there is a buffer space hc between the light guide plate 20 and the bottom of the recess 10b.

[0084] It should be understood that when the back frame 10 is formed by the die casting process, burrs or protrusions may exist around the edges of the accommodating groove 10a, which may affect the subsequent assembly. Therefore, the burrs or protrusions are removed by cleaning to form the groove 10b, thereby avoiding interference in the subsequent assembly.

[0085] In addition, the groove 10b is arranged such that there is a buffer space hc between the light guide plate 20 and the bottom of the groove 10b. When the light guide plate 20 thermally expands, it not only expands left and right, but also expands up and down. The buffer space hc can provide the light guide plate 20 with a downward thermal expansion amount, thereby reducing the upward expansion amount of the light guide plate 20. In addition, when the light guide plate 20 expands upward, it is limited by the first limiting portion 32, that is, the first limiting portion 32 presses the light guide plate 20 downward. Due to the limitation of the first limiting portion 32, the expansion amount of the light guide plate 20 that is not absorbed by the deformation of the first limiting portion 32 is transferred downward. At this time, the buffer space hc can effectively accommodate the downward expansion amount of the light guide plate 20, thereby further reducing the risk of warping or arching of the light guide plate 20.

[0086] In some embodiments of the present application, the back frame 10 further comprises a second limiting portion 13 connected to one side of the side wall 12 close to the accommodating groove 10a. The second limiting portion 13 is arranged above the elastic member 30.

[0087] The second limiting portion 13 is arranged above the elastic member 30, which can reduce the risk of the elastic member 30 jumping out.

[0088] In some embodiments of the present application, the width d1 of the second limiting portion 13 is greater than the width d2 of the elastic body 31.

[0089] Optionally, the width d2 of the elastic body 31 is greater than the width d3 of the first limiting portion 32. The width d1 of the second limiting portion 13 is greater than the width d2 of the elastic body 31, so that the second limiting portion 13 limits most of the elastic member 30, thereby further reducing the risk of the elastic member 30 jumping out.

[0090] In some embodiments of the present application, in the thickness direction of the backlight module 100, the distance gj from the second limiting portion 13 to the elastic member 30 is less than or equal to 0.4 mm.

[0091] It can be understood that after the elastic member 30 is subjected to the horizontal extrusion force of the light guide plate 20, the elastic member 30 will shrink in the direction of the side wall 12, and at the same time, the elastic member 30 will expand upward to release the extrusion force of the light guide plate 20. When the distance gj is too large, the downward force of the elastic member 30 will be greatly reduced due to the release of the extrusion force of the light guide plate 20, thereby reducing the effect of pressing the light guide plate 20 downward.

[0092] In order to improve the pressing effect of the elastic member 30 on the light guide plate 20, the distance gj is less than or equal to 0.4 mm, for example, 0 mm, 0.1 mm, 0.2 mm, 0.3 mm or 0.4 mm.

[0093] In some embodiments of the present application, an underfill adhesive can be further arranged between the elastic member 30 and the bottom plate 11 to connect the bottom plate 11 and the elastic body 31 of the elastic member 30, so as to further prevent the elastic member 30 from jumping off. Optionally, the underfill adhesive is arranged on the side of the elastic body 31 close to the side wall 12, and the part of the elastic member 30 corresponding to the outside of the underfill adhesive has a gap with the bottom plate 11, so as to ensure that the deformation of the elastic member 30 in the left-right direction is weakly affected or not affected by the underfill adhesive.

[0094] In some embodiments of the present application, the backlight module 100 further comprises a reflective sheet 60, a second adhesive layer 52 and a third adhesive layer 53. The reflective sheet 60 is arranged on the side of the light guide plate 20 close to the bottom plate 11. The second adhesive layer 52 is arranged between the light guide plate 20 and the reflective sheet 60. The third adhesive layer 53 is arranged between the reflective sheet 60 and the bottom of the accommodating groove 10a, and the third adhesive layer 53 is arranged in the middle region of the accommodating groove 10a.

[0095] It can be understood that the third adhesive layer 53 is arranged in the middle region of the accommodating groove 10a, and the light guide plate 20 is fixed on the reflective sheet 60 through the second adhesive layer 52, so that the middle region of the light guide plate 20 is indirectly fixed on the bottom plate 11, and the middle region of the light guide plate 20 can be prevented from being arched.

[0096] Optionally, in some embodiments of the present application, the side of the second limiting portion 13 away from the bottom plate 11 is connected with the side wall 12 to form a placing groove 10c, and the placing groove 10c is used to arrange the display panel. That is, the second limiting portion 13 is multiplexed as a supporting portion to support the display panel.

[0097] Please refer to FIG. 5, the present application further provides a display device 1000, which comprises a display panel 200 and a backlight module 100 as described in any one of the above embodiments. The display panel 200 is arranged on the backlight module 100.

[0098] It should be noted that the structure of the backlight module 100 of the display device 1000 of the present application is similar or identical to that of the backlight module 100 of any one of the above embodiments, and thus will not be described here.

[0099] Optionally, in some embodiments of the present application, the display panel 200 is arranged in the placing groove 10c.

[0100] Optionally, the driving architecture of the display panel 200 can be a driving architecture based on a fringe field switching (FFS) technology, a driving architecture based on an in-plane switching (IPS) technology, a driving architecture based on a vertical alignment (VA) technology, or the like.

[0101] Optionally, the display apparatus 1000 can be applied to and used in various products including, for example, a television, a notebook computer, a monitor, a billboard, an Internet of Things (IoT) device, and a portable electronic device including a mobile phone, a smart phone, a tablet personal computer, a mobile communication terminal, an electronic organizer, an electronic book, a portable multimedia player (PMP), a navigation, and an ultra-mobile personal computer (UMPC).

[0102] In addition, the display apparatus 1000 according to some embodiments can be applied to and used in a wearable device including a smart watch, a watch phone, a glasses-type display, and a head-mounted display (HMD). In addition, according to some embodiments, the display apparatus 1000 can be applied to a meter panel for a car, a central instrument panel for a car or a display screen arranged in a central information display (CID) on an instrument panel, an interior mirror display instead of a car side mirror, and a display of an entertainment system arranged on the back of a front seat for a rear seat passenger in a car.

[0103] The backlight module in the display apparatus 1000 according to the embodiments of the present application adopts the elastic member arranged on one side of the light guide plate to buffer the deformation amount of the light guide plate due to high-temperature expansion, thereby reducing the risk of the light guide plate being directly pressed against the side wall and damaged. In addition, in the thickness direction of the backlight module, the first limiting portion of the elastic member is located above the light guide plate, which can have the effect of pressing down the light guide plate, thereby reducing the risk of the light guide plate being warped due to high-temperature expansion.

[0104] The above describes in detail the backlight module and the display apparatus provided by the embodiments of the present application. The principles and embodiments of the present application are described by applying specific examples in this document. The above description of the embodiments is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, the specific embodiments and application range of the present application will be changed according to the principles of the present application. In summary, the content of the present description should not be understood as a limitation of the present application.

Claims

1. A backlight module, comprising: a back frame comprising a bottom plate and a side wall, the side wall being arranged on a peripheral side of the bottom plate to form a receiving groove; a light guide plate arranged on the bottom plate and located in the receiving groove, the light guide plate comprising a light emitting portion and a side connecting portion connected to at least one side of the light emitting portion; a resilient member arranged in the receiving groove and located between the side wall and the light guide plate, the resilient member comprising a resilient body and a first limiting portion connected to one side of the resilient body close to the side connecting portion; in a thickness direction of the backlight module, the first limiting portion is arranged on a side of the side connecting portion away from the bottom plate.

2. The backlight module of claim 1, wherein, in a direction from the side wall to the light guide plate, the thickness of the first limiting portion decreases and the thickness of the side connecting portion increases.

3. The backlight module of claim 2, wherein, the side connecting portion comprises a first contact surface, and the first limiting portion comprises a limiting surface, the limiting surface and the first contact surface being in contact; the first contact surface and the limiting surface are both inclined planes.

4. The backlight module of claim 3, wherein, with respect to a surface of the bottom plate close to the resilient member as a reference, the maximum height of the first contact surface is greater than the maximum height of the limiting surface.

5. The backlight module of claim 3, wherein, with respect to a surface parallel to the surface of the bottom plate close to the resilient member as a reference, the inclination angle of the first contact surface is between 30 degrees and 60 degrees.

6. The backlight module of claim 3, wherein, the side connecting portion comprises a second contact surface connected to the first contact surface, the second contact surface extending along the thickness direction of the backlight module; the second contact surface is in contact with the resilient body.

7. The backlight module of any of claims 1-6, wherein, the light guide plate is in abutment with the resilient member, and the resilient member is in a compressed state.

8. The backlight module of any of claims 1-6, wherein, the backlight module further comprises a first adhesive layer connected to the side wall and the resilient body.

9. The backlight module of any of claims 1-6, wherein, the bottom plate further comprises a groove in communication with the receiving groove, the groove being located in an edge region of the bottom plate, and part of the resilient member is arranged in the groove; in the thickness direction of the backlight module, there is a buffer space between the light guide plate and the bottom of the groove.

10. The backlight module of any of claims 1-6, wherein, the back frame further comprises a second limiting portion connected to one side of the side wall close to the receiving groove, the second limiting portion being arranged above the resilient member.

11. The backlight module of claim 10, wherein, the width of the second limiting portion is greater than the width of the resilient body.

12. The backlight module of claim 10, wherein, in the thickness direction of the backlight module, the distance from the second limiting portion to the resilient member is less than or equal to 0.4 mm.

13. The backlight module of claim 1, wherein, the backlight module further comprises a reflective sheet, a second adhesive layer and a third adhesive layer, the reflective sheet being arranged on one side of the light guide plate close to the bottom plate, the second adhesive layer being connected between the light guide plate and the reflective sheet, and the third adhesive layer being connected between the reflective sheet and the bottom of the receiving groove, the third adhesive layer being located in a middle region of the receiving groove.

14. The backlight module of claim 1, wherein, the back frame is an integrally formed structure.

15. The backlight module of claim 14, wherein, the material of the back frame comprises one of metal, metal alloy and plastic.

16. The backlight module of claim 1, wherein, The side wall comprises a first side wall, a second side wall, a third side wall and a fourth side wall, the first side wall, the second side wall, the third side wall and the fourth side wall are connected end to end, the first side wall and the third side wall are oppositely arranged, the second side wall and the fourth side wall are oppositely arranged, the second side wall and the third side wall are connected to form a first corner, and the fourth side wall and the third side wall are connected to form a second corner. The backlight module further comprises a light emitting source, the light emitting source is arranged in the accommodating groove and located between the light guide plate and the first side wall, the number of the elastic members comprises at least two, one of the elastic members is arranged at the first corner and extends along the extension direction of the first corner, and the other of the elastic members is arranged at the second corner and extends along the extension direction of the second corner.

17. The backlight module of claim 10, wherein, The second limiting portion is connected to the side of the bottom plate away from the side wall to form a placing groove, and the placing groove is configured to arrange the display panel.

18. A display device comprising a display panel and a backlight module, the display panel being arranged on the backlight module; The backlight module comprises: A back frame comprising a bottom plate and a side wall, the side wall being arranged on the circumferential side of the bottom plate to form an accommodating groove; A light guide plate arranged on the bottom plate and located in the accommodating groove, the light guide plate comprising a light emitting portion and a side connecting portion connected to at least one side of the light emitting portion; An elastic member arranged in the accommodating groove and located between the side wall and the light guide plate, the elastic member comprising an elastic body and a first limiting portion connected to one side of the elastic body close to the side connecting portion; In the thickness direction of the backlight module, the first limiting portion is arranged on the side of the side connecting portion away from the bottom plate.

19. The display device of claim 18, wherein, In the direction from the side wall to the light guide plate, the thickness of the first limiting portion decreases and the thickness of the side connecting portion increases.

20. The display device of claim 19, wherein, The side connecting portion comprises a first contact surface, and the first limiting portion has a limiting surface, the limiting surface and the first contact surface are in contact; Both the first contact surface and the limiting surface are inclined planes.

Images