Backlight module and display device

Abstract

A backlight module comprises a back frame, an optical plate, a light source and a buffer piece. The back frame comprises a bottom plate and a side wall connected with the bottom plate. The optical plate is arranged in the back frame and is provided with a light incident side, a first side connected with the light incident side and a bottom surface facing the bottom plate; the light source is arranged in the back frame and located on the light incident side. The buffer piece is arranged between the back frame and the optical plate and comprises a bottom, a first wall and a second wall. The bottom is located between the bottom plate and the bottom face. The first wall is connected with the bottom and located between the side wall and the light incident side. The second wall is connected with the bottom and the first wall and located between the side wall and the first side. The light incident side and the first side are respectively provided with a recess, the first wall and the second wall respectively comprise protruding parts corresponding to the recesses of the light incident side and the first side, and the surfaces, facing the recesses, of the protruding parts are cambered surfaces.

Description

Technical Field

[0001] The invention relates to a backlight module and a display device, and in particular to a backlight module and a display device comprising a buffer. Background Art

[0002] In some display devices, since the display panel itself does not emit light, a backlight module is required to provide a surface light source. In order to reduce the thickness of the backlight module and reduce the number of light-emitting elements used, an edge-entry backlight module has been developed. However, in a general edge-entry backlight module, the light source is set on the side of the light guide plate. When the backlight module is subjected to a vibration or drop test for reliability, the friction between the light guide plate and the light source generates powder, resulting in a bright spot when lit, making the backlight module fail to meet the specifications. Summary of the invention

[0003] The invention provides a backlight module and a display device, comprising a buffer member with a convex portion having an arc surface, which can reduce the friction between an optical plate and a light source, thereby improving reliability.

[0004] The backlight module proposed in at least one embodiment of the present invention includes a back frame, an optical plate, a light source and a first buffer. The back frame includes a bottom plate and a side wall connected to the bottom plate. The optical plate is arranged in the back frame and has a light incident side, a first side connected to the light incident side and a bottom surface facing the bottom plate. The light source is arranged in the back frame and is located on the light incident side. The first buffer is arranged between the back frame and the optical plate and includes a first bottom, a first wall and a second wall. The first bottom is located between the bottom plate and the bottom surface. The first wall is connected to the first bottom and is located between the side wall and the light incident side. The second wall is connected to the first bottom and the first wall and is located between the side wall and the first side. The light incident side has a first recess, the first side has a second recess, the first wall includes a first protrusion corresponding to the first recess, the second wall includes a second protrusion corresponding to the second recess, and the surface of the first protrusion facing the first recess and the surface of the second protrusion facing the second recess are arc surfaces, respectively.

[0005] In at least one embodiment of the present invention, the curvature of each of the curved surfaces is 5 degrees to 150 degrees.

[0006] In at least one embodiment of the present invention, the curvature of the curved surface of the first protruding portion is different from the curvature of the curved surface of the second protruding portion.

[0007] In at least one embodiment of the present invention, the distance between the light source and the light incident side is greater than the distance between the first protrusion and the light incident side.

[0008] In at least one embodiment of the present invention, the optical plate has a second side connected to the light incident side and opposite to the first side, and the backlight module further includes a second buffer, which is arranged between the back frame and the optical plate and includes a second bottom, a third wall and a fourth wall. The second bottom is located between the bottom plate and the bottom surface. The third wall is connected to the second bottom and is located between the side wall and the light incident side. The fourth wall is connected to the second bottom and the third wall and is located between the side wall and the second side. The light incident side has a third recess, the second side has a fourth recess, the third wall includes a third protrusion corresponding to the third recess, the fourth wall includes a fourth protrusion corresponding to the fourth recess, and the surface of the third protrusion facing the third recess and the surface of the fourth protrusion facing the fourth recess are arc surfaces, respectively.

[0009] In at least one embodiment of the present invention, the optical plate has a third side opposite to the light incident side and connected to the first side and the second side, and the backlight module further includes a third buffer, which is disposed between the back frame and the optical plate and includes a third bottom, a fifth wall, and a sixth wall. The third bottom is located between the bottom plate and the bottom surface. The fifth wall is connected to the third bottom and is located between the side wall and the third side. The sixth wall is connected to the third bottom and the fifth wall and is located between the side wall and the first side. The third side has a fifth recess, the first side has a sixth recess, the fifth wall includes a fifth protrusion corresponding to the fifth recess, the sixth wall includes a sixth protrusion corresponding to the sixth recess, and the surface of the fifth protrusion facing the fifth recess and the surface of the sixth protrusion facing the sixth recess are arc surfaces, respectively.

[0010] In at least one embodiment of the present invention, the backlight module further includes a fourth buffer member, which is disposed between the back frame and the optical plate and includes a fourth bottom, a seventh wall, and an eighth wall. The fourth bottom is located between the bottom plate and the bottom surface. The seventh wall is connected to the fourth bottom and is located between the side wall and the third side. The eighth wall is connected to the fourth bottom and the seventh wall and is located between the side wall and the second side. The third side has a seventh recess, the second side has an eighth recess, the seventh wall includes a seventh protrusion corresponding to the seventh recess, the eighth wall includes an eighth protrusion corresponding to the eighth recess, and the surface of the seventh protrusion facing the seventh recess and the surface of the eighth protrusion facing the eighth recess are arc surfaces, respectively.

[0011] In at least one embodiment of the present invention, the back frame has four corners, and the first buffer component, the second buffer component, the third buffer component, and the fourth buffer component are respectively disposed at the corners.

[0012] In at least one embodiment of the present invention, the light source includes a light emitting element and a block adjacent to the light emitting element, and the distance between the light emitting element and the light incident side is greater than the distance between the block and the light incident side.

[0013] A display device provided in at least another embodiment of the present invention includes the backlight module and a display panel disposed on the backlight module. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic top view of a backlight module according to at least one embodiment of the present invention.

[0015] Figure 2 It is a partial cross-sectional schematic diagram of a backlight module according to at least one embodiment of the present invention.

[0016] Figure 3A yes Figure 1 A partial enlarged schematic diagram of the middle corner C1.

[0017] Figure 3B yes Figure 1 A partial enlarged schematic diagram of the middle corner C2.

[0018] Figure 3C yes Figure 1 A partial enlarged schematic diagram of the middle corner C3.

[0019] Figure 3D yes Figure 1 A partial enlarged schematic diagram of the middle corner C4.

[0020] Figure 4 FIG. 4 is a partial enlarged schematic diagram of a corner of a backlight module according to at least another embodiment of the present invention.

[0021] Figure 5 is a cross-sectional schematic diagram of a display device according to at least one embodiment of the present invention.

[0022] Wherein, the accompanying drawings are marked as follows:

[0023] 10: Display device 100: Backlight module

[0024] 102: back frame 102b: bottom plate

[0025] 102w: side wall 104: optical plate

[0026] 106A, 106A': first buffer member 106B: second buffer member

[0027] 106C: third buffer member 106D: fourth buffer member

[0028] 108, 110: light source 108e, 110e: light emitting element

[0029] 108b, 110b: stopper 200: display panel

[0030] B1: First bottom B2: Second bottom

[0031] B3: The third bottom B4: The fourth bottom

[0032] BS: Bottom C1, C2, C3, C4: Corner

[0033] ES: light incident side P1: first protrusion

[0034] P2: second protrusion P3: third protrusion

[0035] P4: fourth protrusion P5: fifth protrusion

[0036] P6: sixth protrusion P7: seventh protrusion

[0037] P8: eighth protrusion R1: first depression

[0038] R2: second depression R3: third depression

[0039] R4: the fourth depression R5: the fifth depression

[0040] R6: the sixth depression R7: the seventh depression

[0041] R8: eighth depression S1: first side

[0042] S2: Second side S3: Third side

[0043] W1: First wall W2: Second wall

[0044] W3: The third wall W4: The fourth wall

[0045] W5: fifth wall W6: sixth wall

[0046] W7: The seventh wall W8: The eighth wall DETAILED DESCRIPTION

[0047] In the following text, in order to clearly present the technical features of the present invention, the dimensions (such as length, width, thickness and depth) of the elements (such as layers, films, substrates and regions, etc.) in the drawings will be enlarged in a non-proportional manner, and the number of some elements will be reduced. Therefore, the description and explanation of the embodiments below are not limited to the number of elements in the drawings and the dimensions and shapes presented by the elements, but should cover the dimensions, shapes and deviations of the two caused by the actual process and / or tolerances. For example, the flat surface shown in the drawings may have rough and / or nonlinear characteristics, and the acute angles shown in the drawings may be rounded. Therefore, the elements presented in the drawings of the present invention are mainly for illustration, and are not intended to accurately depict the actual shape of the elements, nor are they intended to limit the scope of the patent application of the present invention.

[0048] Secondly, the words "about", "approximately" or "substantially" used in the present invention not only cover the numerical values ​​and numerical ranges clearly recorded, but also cover the permissible deviation range that can be understood by a person with ordinary knowledge in the technical field to which the invention belongs, wherein the deviation range can be determined by the error generated during measurement, and the error is caused by the limitation of the measurement system or process conditions, for example. For example, two objects (such as the planes or traces of the substrate) are "substantially parallel" or "substantially perpendicular", wherein "substantially parallel" and "substantially perpendicular" respectively represent that the parallelism and perpendicularity between the two objects may include the non-parallelism and non-perpendicularity caused by the permissible deviation range.

[0049] In addition, "approximately" may mean within one or more standard deviations of the above values, such as ±30%, ±20%, ±10% or ±5%. The words "approximately", "approximately" or "substantially" used in the present invention may be selected based on the optical properties, etching properties, mechanical properties or other properties to select an acceptable deviation range or standard deviation, rather than applying a single standard deviation to all properties such as the above optical properties, etching properties, mechanical properties and other properties.

[0050] The spatially relative terms used in the present invention, such as "below", "under", "above", "on", etc., are for the purpose of facilitating the description of the relative relationship between one element or feature and another element or feature, as shown in the figure. The true meaning of these spatially relative terms includes other orientations. For example, when the figure is flipped up and down 180 degrees, the relationship between one element and another element may change from "below" or "under" to "above" or "on". In addition, the spatially relative descriptions used in the present invention should also be interpreted in the same way.

[0051] It should be understood that, although the present invention may use the terms "first", "second", "third" and the like to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are mainly used to distinguish one element from another element, or one signal from another signal. In addition, the term "or" used in the present invention may include any one or more combinations of the associated listed items depending on the actual situation.

[0052] In addition, the present invention may be implemented or applied through other different specific embodiments, and the details of the present invention may also be combined, modified and changed in various embodiments based on different viewpoints and applications without departing from the concept of the present invention.

[0053] Figure 1 FIG. 1 is a schematic top view of a backlight module 100 according to at least one embodiment of the present invention. Figure 2 FIG. 1 is a partial cross-sectional schematic diagram of a backlight module 100 according to at least one embodiment of the present invention. Figure 3A yes Figure 1 A partial enlarged schematic diagram of the middle corner C1. Figure 1 , Figure 2 and Figure 3A The backlight module 100 includes a back frame 102, an optical plate 104, a light source 108, and a first buffer 106A. The back frame 102 includes a bottom plate 102b and a side wall 102w connected to the bottom plate 102b. The optical plate 104 is disposed in the back frame 102 and has a light incident side ES, a first side S1 connected to the light incident side ES, and a bottom surface BS facing the bottom plate 102b. The light source 108 is disposed in the back frame 102 and is located at the light incident side ES.

[0054] The first buffer member 106A is disposed between the back frame 102 and the optical plate 104, and includes a first bottom B1, a first wall W1, and a second wall W2. The first bottom B1 is located between the bottom plate 102b and the bottom surface BS. The first wall W1 is connected to the first bottom B1, and is located between the side wall 102w and the light incident side ES. The second wall W2 is connected to the first bottom B1 and the first wall W1, and is located between the side wall 102w and the first side S1. The light incident side ES has a first recess R1, the first side S1 has a second recess R2, the first wall W1 includes a first protrusion P1 corresponding to the first recess R1, the second wall W2 includes a second protrusion P2 corresponding to the second recess R2, and the surface of the first protrusion P1 facing the first recess R1 and the surface of the second protrusion P2 facing the second recess R2 are arc surfaces, respectively.

[0055] Since the first buffer 106A is provided with a first protrusion P1 having a curved surface in the first recess R1 corresponding to the light incident side ES of the optical plate 104, and the second protrusion P2 having a curved surface is provided in the second recess R2 corresponding to the first side S1 of the optical plate 104, the friction between the optical plate 104 and the light source 108 can be reduced, thereby improving reliability. In addition, through the above-mentioned design, the positioning effect between the optical plate 104 and the light source 108 can also be achieved, so that the optical microstructure on the optical plate 104, such as the dots on the light guide plate, can be exactly aligned with the light source 108 to avoid the generation of bright and dark lines, thereby improving the display quality.

[0056] like Figure 3A As shown, the distance between the light source 108 and the light incident side ES is greater than the distance between the first protrusion P1 and the light incident side ES. When the backlight module 100 is in a state of vibration or falling, the arc surface of the first protrusion P1 of the first buffer 106A will abut against the first recess R1 of the optical plate 104, thereby avoiding friction between the optical plate 104 and the light source 108, thereby improving reliability. In other words, the surface of the first protrusion P1 facing the first recess R1 and the surface of the second protrusion P2 facing the second recess R2 are used to abut against the first recess R1 and the second recess R2 of the optical plate 104, respectively.

[0057] In addition, the light source 108 includes a light emitting element 108e and a stopper 108b adjacent to the light emitting element 108e, and the distance between the light emitting element 108e and the light incident side ES is greater than the distance between the stopper 108b and the light incident side ES. Through the above design, when the optical plate 104 jumps out of the clamping of the first buffer 106A, the stopper 108b can resist the optical plate 104 to prevent the optical plate 104 from damaging the light emitting element 108e, thereby improving reliability.

[0058] Please continue reading Figure 1 The optical plate 104 further has a second side S2 and a third side S3. The second side S2 is connected to the light-entering side ES and is opposite to the first side S1. The third side S3 is opposite to the light-entering side ES and is connected to the first side S1 and the second side S2. The back frame 102 has four corners C1, C2, C3, and C4. The connection between the light-entering side ES and the first side S1 corresponds to the corner C1, the connection between the light-entering side ES and the second side S2 corresponds to the corner C2, the connection between the first side S1 and the third side S3 corresponds to the corner C3, and the connection between the second side S2 and the third side S3 corresponds to the corner C4.

[0059] Figure 3B yes Figure 1 A partial enlarged schematic diagram of the middle corner C2. Figure 3C yes Figure 1 A partial enlarged schematic diagram of the middle corner C3. Figure 3D yes Figure 1 A partial enlarged schematic diagram of the middle corner C4. Figure 1 , Figure 3A , Figure 3B , Figure 3C and Figure 3D The first buffer 106A is disposed at the corner C1, and the backlight module 100 further includes a second buffer 106B, a third buffer 106C and a fourth buffer 106D respectively disposed at the corners C2, C3 and C4.

[0060] like Figure 3BAs shown, the second buffer member 106B is disposed between the back frame 102 and the optical plate 104, and includes a second bottom B2, a third wall W3 and a fourth wall W4. The second bottom B2 is located between the bottom plate 102b and the bottom surface BS. The third wall W3 is connected to the second bottom B2, and is located between the side wall 102w and the light incident side ES. The fourth wall W4 is connected to the second bottom B2 and the third wall W3, and is located between the side wall 102w and the second side S2. The light incident side ES has a third recess R3, the second side S2 has a fourth recess R4, the third wall W3 includes a third protrusion P3 corresponding to the third recess R3, the fourth wall W4 includes a fourth protrusion P4 corresponding to the fourth recess R4, and the surface of the third protrusion P3 facing the third recess R3 and the surface of the fourth protrusion P4 facing the fourth recess R4 are arc surfaces, respectively. In addition, the surface of the third protrusion P3 facing the third recess R3 and the surface of the fourth protrusion P4 facing the fourth recess R4 are respectively used to abut against the third recess R3 and the fourth recess R4 of the optical plate 104 .

[0061] like Figure 3C As shown, the third buffer member 106C is disposed between the back frame 102 and the optical plate 104, and includes a third bottom B3, a fifth wall W5, and a sixth wall W6. The third bottom B3 is located between the bottom plate 102b and the bottom surface BS. The fifth wall W5 is connected to the third bottom B3, and is located between the side wall 102w and the third side S3. The sixth wall W6 is connected to the third bottom B3 and the fifth wall W5, and is located between the side wall 102w and the first side S1. The third side S3 has a fifth recess R5, the first side S1 has a sixth recess R6, the fifth wall W5 includes a fifth protrusion P5 corresponding to the fifth recess R5, the sixth wall W6 includes a sixth protrusion P6 corresponding to the sixth recess R6, and the surface of the fifth protrusion P5 facing the fifth recess R5 and the surface of the sixth protrusion P6 facing the sixth recess R6 are arc surfaces, respectively. In addition, the surface of the fifth protrusion P5 facing the fifth recess R5 and the surface of the sixth protrusion P6 facing the sixth recess R6 are respectively used to abut against the fifth recess R5 and the sixth recess R6 of the optical plate 104 .

[0062] like Figure 3DAs shown, the fourth buffer member 106D is disposed between the back frame 102 and the optical plate 104, and includes a fourth bottom B4, a seventh wall W7 and an eighth wall W8. The fourth bottom B4 is located between the bottom plate 102b and the bottom surface BS. The seventh wall W7 is connected to the fourth bottom B4, and is located between the side wall 102w and the third side S3. The eighth wall W8 is connected to the fourth bottom B4 and the seventh wall W7, and is located between the side wall 102w and the second side S2. The third side S3 has a seventh recess R7, the second side S2 has an eighth recess R8, the seventh wall W7 includes a seventh protrusion P7 corresponding to the seventh recess R7, the eighth wall W8 includes an eighth protrusion P8 corresponding to the eighth recess R8, and the surface of the seventh protrusion P7 facing the seventh recess R7 and the surface of the eighth protrusion P8 facing the eighth recess R8 are arc surfaces, respectively. In addition, the surface of the seventh protrusion P7 facing the seventh recess R7 and the surface of the eighth protrusion P8 facing the eighth recess R8 are respectively used to abut against the seventh recess R7 and the eighth recess R8 of the optical plate 104 .

[0063] Please continue reading Figure 3C and Figure 3D The backlight module 100 may further include a light source 110 disposed on the third side S3, and the light source 110 includes a light-emitting element 110e and a blocking block 110b adjacent to the light-emitting element 110e, and the distance between the light-emitting element 110e and the third side S3 is greater than the distance between the blocking block 108b and the third side S3.

[0064] In some embodiments, the optical plate 104 may be a light guide plate and / or other optical films, such as a reflective film, a diffuser, a brightness enhancement film, etc. The material of the optical plate 104 may include polyethylene terephthalate (PET), poly (methyl methacrylate) (PMMA), polycarbonate (PC), cyclic olefin copolymer (COC), cyclic olefin polymer (COP), etc.

[0065] The light sources 108 and 110 may be light bars, and the light emitting elements 108e and 110e may be light emitting diodes (LEDs). The materials of the first buffer 106A, the second buffer 106B, the third buffer 106C, and the fourth buffer 106D may include elastic materials such as rubber and silicone to achieve the effect of proper buffering and resilience, but the present invention is not limited thereto. For example, if the backlight module 100 is applied to a display device of about 32 inches or less, the first buffer 106A, the second buffer 106B, the third buffer 106C, and the fourth buffer 106D may be made of materials with a Shorehardness type A of about 50 degrees or less; if the backlight module 100 is applied to a display device of about 32 inches or more, the first buffer 106A, the second buffer 106B, the third buffer 106C, and the fourth buffer 106D may be made of materials with a Shorehardness type A of about 60 degrees or more.

[0066] In some embodiments, the arc angles of the arc surfaces of the first protrusion P1, the second protrusion P2, the third protrusion P3, the fourth protrusion P4, the fifth protrusion P5, the sixth protrusion P6, the seventh protrusion P7 and the eighth protrusion P8 may be approximately 5 degrees to 150 degrees, respectively. The top view shapes of the first protrusion P1, the second protrusion P2, the third protrusion P3, the fourth protrusion P4, the fifth protrusion P5, the sixth protrusion P6, the seventh protrusion P7 and the eighth protrusion P8 may be substantially circular or elliptical, respectively.

[0067] Figure 4 FIG. 1 is a partially enlarged schematic diagram of a corner of a backlight module of at least another embodiment of the present invention. Figure 4 , Figure 4 Examples and Figure 3A Most of the component structures, materials and relative position relationships of the embodiments are the same, so they will not be repeated here. The differences between the two embodiments are: Figure 3A The top view shape of the first protrusion P1 and the second protrusion P2 of the first buffer member 106A is substantially circular. Figure 4 The top view shapes of the first protruding portion P1 and the second protruding portion P2 of the first buffer member 106A′ are substantially elliptical.

[0068] In detail, Figure 4 As shown, the curvature of the arc surface of the first protrusion P1 is different from the curvature of the arc surface of the second protrusion P2. For example, the curvature of the arc surface of the first protrusion P1 is greater than the curvature of the arc surface of the second protrusion P2. Through the above-mentioned design, when the backlight module 100 is placed upright, that is, the optical plate 104 will be pressed downward in the direction of the light source 108, and the first protrusion P1 with a larger curvature of the arc surface can disperse the pressure, but the present invention is not limited to this.

[0069] Figure 5 is a cross-sectional schematic diagram of a display device 10 according to at least one embodiment of the present invention. Figure 5 The display device 10 includes the backlight module 100 and a display panel 200 disposed on the backlight module 100. In some embodiments, the display panel 200 may be a liquid crystal display panel (LCD), but the present invention is not limited thereto.

[0070] In summary, in the backlight module and display device of at least one embodiment of the present invention, the friction between the optical plate and the light source can be reduced by providing a protrusion with a curved surface in the depression of the buffer member corresponding to the light incident side of the optical plate, thereby improving reliability. In addition, through the above-mentioned design, the positioning effect between the optical plate and the light source can also be achieved, so that the optical microstructure on the optical plate, such as the dots on the light guide plate, can be exactly aligned with the light source to avoid the generation of bright and dark lines, thereby improving the display quality.

[0071] Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. A person having ordinary knowledge in the technical field to which the present invention belongs may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the attached patent application.

Claims

1. A backlight module, characterized in that: include: A back frame, comprising a bottom plate and a side wall connected to the bottom plate; An optical plate is disposed in the back frame and has a light incident side, a first side connected to the light incident side, and a bottom surface facing the bottom plate; A light source is disposed in the back frame and located at the light incident side; as well as A first buffer member is disposed between the back frame and the optical plate and includes: a first bottom portion, located between the bottom plate and the bottom surface; a first wall connected to the first bottom and located between the side wall and the light incident side; and A second wall connects the first bottom and the first wall and is located between the side wall and the first side, wherein the light incident side has a first recess, the first side has a second recess, the first wall includes a first protrusion corresponding to the first recess, the second wall includes a second protrusion corresponding to the second recess, and the surface of the first protrusion facing the first recess and the surface of the second protrusion facing the second recess are respectively an arc surface.

2. The backlight module according to claim 1, wherein: The curvature of each of the curved surfaces is 5 degrees to 150 degrees.

3. The backlight module according to claim 2, wherein: The curvature of the curved surface of the first protruding portion is different from the curvature of the curved surface of the second protruding portion.

4. The backlight module according to claim 1, wherein: The distance between the light source and the light incident side is greater than the distance between the first protrusion and the light incident side.

5. The backlight module according to claim 1, wherein: The optical plate has a second side connected to the light incident side and opposite to the first side. The backlight module further includes a second buffer, which is disposed between the back frame and the optical plate and includes: a second bottom portion, located between the bottom plate and the bottom surface; a third wall connected to the second bottom and located between the side wall and the light incident side; and A fourth wall connects the second bottom and the third wall and is located between the side wall and the second side, wherein the light incident side has a third recess, the second side has a fourth recess, the third wall includes a third protrusion corresponding to the third recess, the fourth wall includes a fourth protrusion corresponding to the fourth recess, and the surface of the third protrusion facing the third recess and the surface of the fourth protrusion facing the fourth recess are respectively an arc surface.

6. The backlight module according to claim 5, characterized in that: The optical plate has a third side opposite to the light incident side and connected to the first side and the second side. The backlight module further includes a third buffer, which is disposed between the back frame and the optical plate and includes: a third bottom portion, located between the bottom plate and the bottom surface; a fifth wall connected to the third bottom and located between the side wall and the third side; and A sixth wall connects the third bottom and the fifth wall and is located between the side wall and the first side, wherein the third side has a fifth recess, the first side has a sixth recess, the fifth wall includes a fifth protrusion corresponding to the fifth recess, the sixth wall includes a sixth protrusion corresponding to the sixth recess, and the surface of the fifth protrusion facing the fifth recess and the surface of the sixth protrusion facing the sixth recess are both arc surfaces.

7. The backlight module according to claim 6, wherein: The backlight module further includes a fourth buffer member, which is disposed between the back frame and the optical plate and includes: a fourth bottom portion, located between the bottom plate and the bottom surface; a seventh wall connected to the fourth bottom and located between the side wall and the third side; and An eighth wall connects the fourth bottom and the seventh wall and is located between the side wall and the second side, wherein the third side has a seventh recess, the second side has an eighth recess, the seventh wall includes a seventh protrusion corresponding to the seventh recess, the eighth wall includes an eighth protrusion corresponding to the eighth recess, and the surface of the seventh protrusion facing the seventh recess and the surface of the eighth protrusion facing the eighth recess are respectively an arc surface.

8. The backlight module according to claim 7, wherein: The back frame has four corners, and the first buffer component, the second buffer component, the third buffer component and the fourth buffer component are respectively arranged at the corners.

9. The backlight module according to claim 1, wherein: The light source includes a light emitting element and a stopper adjacent to the light emitting element. The distance between the light emitting element and the light incident side is greater than the distance between the stopper and the light incident side.

10. A display device, characterized in that: include: The backlight module according to any one of claims 1 to 9; as well as A display panel is disposed on the backlight module.

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