Backlight module and display device

Abstract

The utility model provides a backlight module and a display device, the backlight module comprises a back plate, a light guide plate, a buffer piece and a light source, at least two positioning parts are arranged on a bottom plate of the back plate, notches are formed in the positions, corresponding to the positioning parts, of the light guide plate, the light source is arranged on one side of the light guide plate, and the buffer piece is arranged on the positioning parts in a sleeving mode and located in the notches. The at least two positioning parts comprise a first positioning part and a second positioning part which are located on the two opposite sides of the light guide plate, and the buffer parts corresponding to the first positioning part and the second positioning part abut against the edge, away from the light source, of the light guide plate; therefore, by arranging the at least two positioning parts, the light guide plate can be positioned, meanwhile, the light guide plate can be prevented from extruding the light source, materials needed for positioning the light guide plate are reduced, the cost of the backlight module is reduced, and therefore the problem that the material cost is high due to the fact that a large number of positioning blocks and stopping blocks are arranged on the backlight module is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of display, in particular to a backlight module and a display device. Background Art

[0002] Since a liquid crystal display is a non-self-luminous display device, in order to achieve a display effect, a light source device needs to be provided for the liquid crystal display to realize the display function, such as a backlight module, whose function is to provide a backlight source with sufficient brightness and uniform distribution for the liquid crystal display. As Figure 1 shown, the backlight module includes a back plate, a light guide plate, and a light source. The light guide plate is disposed within the back plate, and the light source is disposed on one side of the light guide plate. In order to ensure the reliability of the light guide plate during transportation, a light guide plate positioning structure needs to be designed. The light guide plate positioning structure includes six positioning blocks pasted on the side plates of the back plate. Moreover, in order to protect the light source, three blocking blocks are further provided between the light guide plate and the light source to prevent the light guide plate from colliding with the light source. However, setting so many positioning blocks and blocking blocks on the backlight module requires more materials, resulting in a higher cost of the backlight module. Summary of the Utility Model

[0003] The utility model provides a backlight module and a display device to improve the technical problem of the relatively high cost of the backlight module.

[0004] To solve the above problems, the technical solutions provided by the utility model are as follows:

[0005] An embodiment of the utility model provides a backlight module, which includes:

[0006] A back plate, the back plate includes a bottom plate, at least two positioning portions are provided on the bottom plate, the positioning portions are formed on the bottom plate and are integrally provided with the bottom plate;

[0007] A light guide plate, the light guide plate is located on the bottom plate, and the light guide plate is provided with notches at positions corresponding to the positioning portions;

[0008] A light source, the light source is disposed on one side of the light guide plate;

[0009] A buffer member, the buffer member is sleeved on the positioning portion and is located within the notch;

[0010] Wherein, among the at least two positioning portions, there are a first positioning portion and a second positioning portion located on two opposite sides of the light guide plate, and the buffer members corresponding to the first positioning portion and the second positioning portion are both in contact with the edge of the light guide plate away from the light source.

[0011] In the backlight module provided by the embodiment of the present utility model, an opening is provided at the position of the bottom plate corresponding to the positioning portion. The positioning portion is located on one side of the opening, and the area of the opening is larger than the area of the positioning portion.

[0012] In the backlight module provided by the embodiment of the present utility model, the back plate further includes a side plate surrounding the bottom plate. The side plate and the bottom plate form a receiving cavity. The light guide plate is located in the receiving cavity, and the positioning portion is located on the side of the light guide plate close to the side plate; in the direction perpendicular to the plane where the bottom plate is located, the height of the positioning portion is less than the height of the side plate.

[0013] In the backlight module provided by the embodiment of the present utility model, the light source includes a plurality of light emitting devices arranged at intervals in a first direction. The light guide plate and the light source are arranged at intervals in a second direction. Both the first positioning portion and the second positioning portion are located on the side of the light guide plate close to the light source.

[0014] In the backlight module provided by the embodiment of the present utility model, the length of the first positioning portion in the second direction is greater than the width of the first positioning portion in the first direction; the length of the second positioning portion in the second direction is greater than the width of the second positioning portion in the first direction.

[0015] In the backlight module provided by the embodiment of the present utility model, in the second direction, there is a first distance between the first positioning portion and the light guide plate, and a second distance between the second positioning portion and the light guide plate. Both the first distance and the second distance are less than or equal to the distance between the light guide plate and the light source. The thickness of the buffer member corresponding to the first positioning portion in the second direction is equal to the first distance; the thickness of the buffer member corresponding to the second positioning portion in the second direction is equal to the second distance.

[0016] In the backlight module provided by the embodiment of the present utility model, the third positioning portion among the at least two positioning portions is located on the side of the light guide plate away from the light source, and the third positioning portion is arranged in alignment with one of the first positioning portion and the second positioning portion.

[0017] In the backlight module provided by the embodiment of the present utility model, the fourth positioning portion among the at least two positioning portions is located on the side of the light guide plate away from the light source, and the fourth positioning portion is arranged in alignment with the other one of the first positioning portion and the second positioning portion.

[0018] In the backlight module provided by the embodiment of the present utility model, the length of the third positioning portion in the first direction is greater than the width of the third positioning portion in the second direction; the length of the fourth positioning portion in the first direction is greater than the width of the fourth positioning portion in the second direction.

[0019] The embodiment of the present utility model also provides a display device, which includes:

[0020] A display panel;

[0021] The backlight module as described in any one of the foregoing embodiments, wherein the display panel is disposed opposite to the backlight module.

[0022] The beneficial effects of the present utility model are as follows: In the backlight module and the display device provided by the present utility model, the backlight module includes a back plate, a light guide plate, a buffer member, and a light source. At least two positioning portions are provided on the bottom plate of the back plate. The light guide plate is provided with notches at positions corresponding to the positioning portions. The light source is disposed on one side of the light guide plate. The buffer member is sleeved on the positioning portion and is located in the notch. At least two positioning portions include a first positioning portion and a second positioning portion located on two opposite sides of the light guide plate. The buffer members corresponding to the first positioning portion and the second positioning portion are both in contact with the edge of the light guide plate away from the light source. In this way, by providing at least two positioning portions, the positioning of the light guide plate can be achieved while avoiding the light guide plate from squeezing the light source, reducing the materials required for positioning the light guide plate, reducing the cost of the backlight module, and thus improving the problem of high material cost caused by setting more positioning blocks and blocking blocks on the backlight module. Moreover, the buffer member sleeved on the positioning portion can not only protect the light guide plate but also buffer the deformation amount generated by the expansion of the light guide plate. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 A partial plan structure diagram of a backlight module is schematically shown, which serves as the basis for the improvement of the present utility model.

[0025] Figure 2 A plan structure diagram of a backlight module provided by an embodiment of the present utility model.

[0026] Figure 3 For Figure 2 An enlarged schematic diagram of part A in

[0027] Figure 4It is Figure 3 a schematic diagram after removing the light guide plate and the light source in

[0028] Figure 5 It is Figure 4 a schematic diagram of the sectional structure in along the M-M’ direction.

[0029] Figure 6 It is Figure 2 an enlarged schematic diagram at position B in

[0030] Figure 7 Another schematic diagram of the planar structure of the backlight module provided by an embodiment of the present invention.

[0031] Figure 8 It is Figure 7 an enlarged schematic diagram at position C in

[0032] Figure 9 It is Figure 7 an enlarged schematic diagram at position D in Detailed implementation manners

[0033] The descriptions of the following embodiments refer to the attached drawings, which are used to illustrate specific embodiments in which the present invention can be implemented. The directional terms mentioned in the present invention, such as [up], [down], [front], [back], [left], [right], [inside], [outside], [side], etc., only refer to the directions in the attached drawings. Therefore, the directional terms used are for explaining and understanding the present invention, rather than for limiting the present invention. In the figures, similar structures are denoted by the same reference numerals. In the drawings, for the sake of clear understanding and easy description, the thicknesses of some layers and regions are exaggerated. That is, the sizes and thicknesses of each component shown in the drawings are arbitrarily shown, but the present invention is not limited thereto.

[0034] Please refer to Figures 2 to 6 , Figure 2 which is a schematic diagram of the planar structure of the backlight module provided by an embodiment of the present invention, Figure 3 It is Figure 2 an enlarged schematic diagram at position A in Figure 4 It is Figure 3 a schematic diagram after removing the light guide plate and the light source in Figure 5 It is Figure 4 a schematic diagram of the sectional structure in along the M-M’ direction, Figure 6 It is Figure 2An enlarged schematic view of position B. The backlight module 100 includes a backplane 10, a light guide plate 20, a light source 30, and a buffer member 40. The backplane 10 includes a bottom plate 11, and at least two positioning portions 111 are provided on the bottom plate 11. The two positioning portions 111 are located in the edge area of the bottom plate 11. The light guide plate 20 is located on the bottom plate 11 and is arranged in alignment with the bottom plate 11. The light guide plate 20 is provided with notches 201 at positions corresponding to the positioning portions 111. The light source 30 is arranged on one side of the light guide plate 20. The buffer member 40 is sleeved on the positioning portions 111 and is located within the notches 201.

[0035] Among the at least two positioning portions 111, there are a first positioning portion 111-1 and a second positioning portion 111-2 located on two opposite sides of the light guide plate 20. The buffer members 40 corresponding to the first positioning portion 111-1 and the second positioning portion 111-2 are both in contact with the edge of the light guide plate 20 away from the light source 30. Specifically, the first positioning portion 111-1 and the second positioning portion 111-2 among the at least two positioning portions 111 cooperate to prevent the light guide plate 20 from squeezing the light source 30, and the notches 201 corresponding to the first positioning portion 111-1 and the notches 201 corresponding to the second positioning portion 111-2 are arranged at intervals. Among them, it is defined that Figure 2 the positioning portion 111 at position A is the first positioning portion 111-1, as Figure 3 shown; Figure 2 the positioning portion 111 at position B is the second positioning portion 111-2, as Figure 6 shown; Of course, the positions of the first positioning portion 111-1 and the second positioning portion 111-2 can also be interchanged.

[0036] In the embodiment of the present invention, by providing at least two positioning portions 111, the positioning of the light guide plate 20 can be realized while preventing the light guide plate 20 from squeezing the light source 30, reducing the materials required for positioning the light guide plate 20, reducing the cost of the backlight module 100, and thus improving the problem of high material cost caused by setting more positioning blocks and blocking blocks on the backlight module 100. Moreover, the buffer member 40 sleeved on the positioning portion 111 can not only protect the light guide plate 20, but also buffer the deformation amount generated by the expansion of the light guide plate 20.

[0037] Specifically, referring to Figure 2 , the backplane 10 includes a bottom plate 11 and side plates 12 surrounding the bottom plate 11. The side plates 12 extend in a direction away from the bottom plate 11 along the end of the bottom plate 11, and the side plates 12 are integrally formed with the bottom plate 11. The extending direction of the side plates 12 is set at a preset angle with the plane where the bottom plate 11 is located. For example, the preset angle is 90 degrees, so that the side plates 12 are perpendicular to the bottom plate 11.

[0038] The side plate 12 cooperates with the bottom plate 11 to form a receiving cavity for receiving the light guide plate 20 and the light source 30. The light source 30 includes a circuit board 31 and a plurality of light emitting devices 32 disposed on the circuit board 31, and the plurality of light emitting devices 32 are spaced apart in the first direction X. The light source 30 is located on one side of the light guide plate 20, and there is a gap between the light source 30 and the light guide plate 20 to prevent the light guide plate 20 from squeezing and colliding with the light source 30. For example, the light source 30 and the light guide plate 20 are spaced apart in the second direction Y. Wherein, the second direction Y is different from the first direction X. For example, the first direction X is the horizontal direction, the second direction Y is the vertical direction, and the first direction X and the second direction Y are perpendicular.

[0039] The light source 30 is fixed on the side plate 12, that is, the light source 30 is located between the light guide plate 20 and the side plate 12. Of course, in some embodiments, the side plate 12 may also be provided with an opening 112 on one side, and the light source 30 is disposed on the side of the opening 112. In addition, the back plate 10 is also used to support and fix the structure to be supported, such as a display panel. The material of the back plate 10 is a support material with a relatively high hardness such as metal, and the support strength of the metal is large, which can better support the structure to be supported.

[0040] Two positioning portions 111 are provided in the edge region of the bottom plate 11. Wherein, the edge region of the bottom plate 11 refers to the region of the bottom plate 11 close to the side plate 12. The light guide plate 20 is provided with notches 201 at positions corresponding to the positioning portions 111, the positioning portions 111 are located within the notches 201, and the positioning portions 111 are located on the side of the light guide plate 20 close to the side plate 12. The material of the light guide plate 20 is usually plastic, so that the light guide plate 20 is prone to expansion and deformation in a humid and hot environment.

[0041] The buffer member 40 is sleeved on the positioning portion 111, located within the notch 201, and abuts against the edge of the light guide plate 20 in the second direction Y. In this way, the buffer member 40 can protect the light guide plate 20 and prevent the light guide plate 20 from colliding with the positioning portion 111 and causing scratches on the side surface of the light guide plate 20. Moreover, the buffer member 40 will undergo elastic deformation when subjected to the extrusion force of the light guide plate 20 to buffer the deformation amount generated by the expansion of the light guide plate 20. The material of the buffer member 40 is rubber, silica gel or other elastic flexible materials. In addition, the buffer member 40 is designed as a ring shape, without the need for glue preparation or pasting, and can be directly sleeved on the positioning portion 111, which improves the assembly convenience and there will be no glue detachment problem.

[0042] Optionally, both of the two positioning portions 111 are located on the side of the light guide plate 20 close to the light source 30, and the two positioning portions 111 are respectively located at two corners of the light guide plate 20. The two positioning portions 111 are symmetrically arranged with respect to the light guide plate 20. Specifically, the light guide plate 20 includes two first side edges 21 oppositely arranged in the first direction X and two second side edges 22 oppositely arranged in the second direction Y. The two second side edges 22 are located between the two first side edges 21. The length of the first side edge 21 is less than the length of the second side edge 22. The light source 30 is correspondingly arranged with the second side edge 22.

[0043] The positioning portion 111 is located at the junction of the first side edge 21 and the second side edge 22, and the junction of the first side edge 21 and the second side edge 22 is the corner of the light guide plate 20. The notch 201 on the light guide plate 20 is correspondingly arranged with the positioning portion 111, so that the position where the positioning portion 111 is located is also the position where the notch 201 is located. That is, the notch 201 is located at the junction of the first side edge 21 and the second side edge 22. In other words, the notch 201 is located at the corner of the light guide plate 20.

[0044] Wherein, the notch 201 is an open notch, that is, the notch 201 is formed by the first side edge 21 and / or the second side edge 22 recessing towards the middle area of the light guide plate 20. The open notch 201 is beneficial to the assembly of the light guide plate 20. Of course, in some embodiments, the notch 201 can also be a closed notch, and the closed notch 201 is surrounded by the light guide plate 20. The closed notch 201 can be more beneficial to the positioning of the light guide plate 20 by the positioning portion 111.

[0045] For the light guide plate 20, the material of the light guide plate 20 is usually plastic, so that the light guide plate 20 is prone to expansion in a humid and hot environment, and the expansion amount in the middle area of the light guide plate 20 is larger than that in the corner area. By setting the position of the notch 201 at the corner of the light guide plate 20, a smaller gap can be reserved between the positioning portion 111 and the light guide plate 20 to buffer the deformation amount generated by the expansion of the light guide plate 20, thereby reducing the area of the border region and facilitating the realization of a narrow border.

[0046] Of course, in some other embodiments, the notch 201 can also be set at other positions on the first side edge 21 or the second side edge 22. For example, the two notches 201 corresponding to the two positioning portions 111 are respectively arranged in the middle areas of the two first side edges 21. At this time, the positioning of the light guide plate 20 by the positioning portion 111 can also be realized.

[0047] Reference Figure 3 and Figure 6 Figure 6 , the two positioning parts 111 are a first positioning part 111-1 and a second positioning part 111-2. In the second direction Y, there is a first distance D1 between the first positioning part 111-1 and the light guide plate 20, and there is a second distance D2 between the second positioning part 111-2 and the light guide plate 20. Both the first distance D1 and the second distance D2 are less than or equal to the distance L1 / L2 between the light guide plate 20 and the light source 30. Moreover, the thickness of the buffer member 40 corresponding to the first positioning part 111-1 in the second direction Y is equal to the first distance D1; the thickness of the buffer member 40 corresponding to the second positioning part 111-2 in the second direction Y is equal to the second distance D2.

[0048] That is, the buffer member 40 corresponding to the first positioning part 111-1 abuts against the light guide plate 20 in the second direction Y, and there is no gap between them; the buffer member 40 corresponding to the second positioning part 111-2 abuts against the light guide plate 20 in the second direction Y, and there is no gap between them; thus, even if the light guide plate 20 deforms in the second direction Y due to expansion and squeezes the buffer member 40, the light guide plate 20 will not squeeze and collide with the light source 30.

[0049] In the first direction X, there is a third distance D3 between the buffer member 40 corresponding to the first positioning part 111-1 and the light guide plate 20, and there is a fourth distance D4 between the buffer member 40 corresponding to the second positioning part 111-2 and the light guide plate 20. Both the third distance D3 and the fourth distance D4 are less than or equal to 0.5 mm. For example, both the third distance D3 and the fourth distance D4 are 0.5 mm, 0.45 mm, 0.42 mm, 0.4 mm, 0.38 mm, 0.36 mm, 0.34 mm, 0.32 mm, 0.3 mm, 0.25 mm, 0.2 mm, 0.1 mm, etc.

[0050] The third spacing D3 and the fourth spacing D4 cooperate with the corresponding buffer member 40 to provide a deformation space for the light guide plate 20 in the first direction X. Moreover, the light guide plate 20 is also located between the first positioning portion 111-1 and the second positioning portion 111-2, that is, the notches 201 corresponding to the first positioning portion 111-1 and the notches 201 corresponding to the second positioning portion 111-2 are arranged at intervals. The first positioning portion 111-1 and the second positioning portion 111-2 can define the moving range of the light guide plate 20 in the first direction X to position the light guide plate 20. Thus, in this embodiment, by providing two positioning portions 111, the positioning of the light guide plate 20 can be achieved while avoiding the light guide plate 20 from squeezing the light source 30, reducing the materials required for positioning the light guide plate 20, lowering the cost of the backlight module 100, and thus improving the problem of high material cost caused by setting more positioning blocks and blocking blocks on the backlight module 100.

[0051] Optionally, both the first positioning portion 111-1 and the second positioning portion 111-2 extend along the second direction Y. Correspondingly, the notches 201 corresponding to the first positioning portion 111-1 and the notches 201 corresponding to the second positioning portion 111-2 also extend along the second direction Y. Specifically, the length of the first positioning portion 111-1 in the second direction Y is greater than the width of the first positioning portion 111-1 in the first direction X; the length of the second positioning portion 111-2 in the second direction Y is greater than the width of the second positioning portion 111-2 in the first direction X.

[0052] That is, the anti-deformation strength of the first positioning portion 111-1 and the second positioning portion 111-2 in the second direction Y is greater than the anti-deformation strength of the first positioning portion 111-1 and the second positioning portion 111-2 in the first direction X, so that the first positioning portion 111-1 and the second positioning portion 111-2 can better limit the movement of the light guide plate 20 towards the light source 30 to ensure the gap between the light guide plate 20 and the light source 30 and avoid the light guide plate 20 from squeezing and colliding with the light source 30.

[0053] In one embodiment, refer to Figure 4 and Figure 5, the positioning portion 111 is formed on the bottom plate 11. The positioning portion 111 is integrally formed with the bottom plate 11, that is, the positioning portion 111 is integrally provided with the bottom plate 11. The width of the positioning portion 111 is equal to the thickness of the bottom plate 11. An opening 112 is provided on the bottom plate 11 at a position corresponding to the positioning portion 111. The opening 112 is left after the positioning portion 111 is formed on the bottom plate 11. The positioning portion 111 is located on one side of the opening 112, and the area of the opening 112 is larger than the area of the positioning portion 111. In this way, the positioning portion 111 extends out from the bottom plate 11 and is integrally formed, so that there is no need to additionally assemble other limiting structures or rivets, reducing the assembly process of the backplane 10 assembly and lowering the material cost.

[0054] Optionally, in a direction perpendicular to the plane where the bottom plate 11 is located, the height of the positioning portion 111 is less than the height of the side plate 12 to prevent the positioning portion 111 from interfering with other structures provided on the backplane 10. For example, the backlight module 100 further includes other optical films disposed on a side of the light guide plate 20 away from the bottom plate 11. The optical films include a brightness enhancement film, etc., to improve the light output brightness of the backlight. And the height of the positioning portion 111 being less than the height of the side plate 12 can prevent the positioning portion 111 from interfering with the brightness enhancement film. At the same time, the height of the positioning portion 111 can be comparable to the thickness of the light guide plate 20. For example, the height of the positioning portion 111 is less than or equal to the thickness of the light guide plate 20, and the thickness of the light guide plate 20 is less than the height of the side plate 12.

[0055] In one embodiment, referring to Figures 2 to 9 , Figure 7 is another schematic plan view of the backlight module 100 provided by the embodiment of the present invention. Figure 8 is Figure 7 an enlarged view of the C position in Figure 9 is Figure 7 an enlarged view of the D position in Figure 7 The enlarged views of positions A and B in Figure 3 and Figure 6 can be referred to respectively. Referring to Figure 7 , the number of the at least two positioning portions 111 is 4, and the 4 positioning portions 111 are respectively located at the 4 corners of the light guide plate 20.

[0056] Specifically, the third positioning portion 111-3 among the at least two positioning portions 111 is located on the side of the light guide plate 20 away from the light source 30, and the third positioning portion 111-3 is arranged in alignment with one of the first positioning portion 111-1 and the second positioning portion 111-2. The fourth positioning portion 111-4 among the at least two positioning portions 111 is located on the side of the light guide plate 20 away from the light source 30, and the fourth positioning portion 111-4 is arranged in alignment with the other of the first positioning portion 111-1 and the second positioning portion 111-2. The third positioning portion 111-3 and the fourth positioning portion 111-4 are symmetrically arranged with respect to the light guide plate 20, the light guide plate 20 is located between the third positioning portion 111-3 and the fourth positioning portion 111-4, and at the same time, the light guide plate 20 is also located between the third positioning portion 111-3 and the first positioning portion 111-1 and between the fourth positioning portion 111-4 and the second positioning portion 111-2. The third positioning portion 111-3 and the fourth positioning portion 111-4 can define the moving range of the light guide plate 20 in the first direction X and the second direction Y to accurately position the light guide plate 20.

[0057] Referring to Figure 3 , Figure 6 and Figure 8 and Figure 9 , in the first direction X, there is a third distance D3 between the buffer member 40 corresponding to the first positioning portion 111-1 and the light guide plate 20, there is a fourth distance D4 between the buffer member 40 corresponding to the second positioning portion 111-2 and the light guide plate 20, there is a fifth distance D5 between the buffer member 40 corresponding to the third positioning portion 111-3 and the light guide plate 20, and there is a sixth distance D6 between the buffer member 40 corresponding to the fourth positioning portion 111-4 and the light guide plate 20; in the second direction Y, there is a seventh distance D7 between the buffer member 40 corresponding to the third positioning portion 111-3 and the light guide plate 20, and there is an eighth distance D8 between the buffer member 40 corresponding to the fourth positioning portion 111-4 and the light guide plate 20; the third distance D3, the fourth distance D4, the fifth distance D5, the sixth distance D6, the seventh distance D7, and the eighth distance D8 are all less than or equal to 0.5 mm, for example, both the third distance D3 and the fourth distance D4 are 0.5 mm, 0.45 mm, 0.42 mm, 0.4 mm, 0.38 mm, 0.36 mm, 0.34 mm, 0.32 mm, 0.3 mm, 0.25 mm, 0.2 mm, 0.1 mm, etc.

[0058] The fifth spacing D5 and the sixth spacing D6 cooperate with the corresponding buffer member 40 to provide a deformation space for the light guide plate 20 in the first direction X; the seventh spacing D7 and the eighth spacing D8 cooperate with the corresponding buffer member 40 to provide a deformation space for the light guide plate 20 in the second direction Y.

[0059] Optionally, the length of the third positioning portion 111-3 in the first direction X is greater than the width of the third positioning portion 111-3 in the second direction Y; the length of the fourth positioning portion 111-4 in the first direction X is greater than the width of the fourth positioning portion 111-4 in the second direction Y. That is, the anti-deformation strength of the third positioning portion 111-3 and the fourth positioning portion 111-4 in the first direction X is greater than the anti-deformation strength of the third positioning portion 111-3 and the fourth positioning portion 111-4 in the second direction Y, so that the third positioning portion 111-3 and the fourth positioning portion 111-4 can better limit the movement of the light guide plate 20 in the first direction X.

[0060] Moreover, the widths of the first positioning portion 111-1, the second positioning portion 111-2, the third positioning portion 111-3, and the fourth positioning portion 111-4 are all equal to the thickness of the bottom plate 11. At this time, the anti-deformation strength of the third positioning portion 111-3 and the fourth positioning portion 111-4 in the second direction Y is less than the anti-deformation strength of the first positioning portion 111-1 and the second positioning portion 111-2 in the second direction Y. When the deformation amount generated by the light guide plate 20 due to expansion exceeds the gap reserved between the positioning portion 111 and the light guide plate 20, the third positioning portion 111-3 and the fourth positioning portion 111-4 are more likely to deform in the second direction Y compared to the first positioning portion 111-1 and the second positioning portion 111-2, so that the deformation amount of the light guide plate 20 extends in a direction away from the light source 30, thereby still ensuring the gap between the light guide plate 20 and the light source 30 and preventing the light guide plate 20 from squeezing and colliding with the light source 30.

[0061] In some other embodiments, the number of the at least two positioning portions 111 can also be 3, for example, the 3 positioning portions 111 are the first positioning portion 111-1, the second positioning portion 111-2, and the third positioning portion 111-3; or, the 3 positioning portions 111 are the first positioning portion 111-1, the second positioning portion 111-2, and the fourth positioning portion 111-4; and the positions of the third positioning portion 111-3 and the fourth positioning portion 111-4 are not limited to being arranged at the corners of the light guide plate 20. Additionally, the number of the at least two positioning portions 111 can also be more, such as 5, 6, etc.

[0062] Based on the same utility model concept, the present utility model further provides a display device, which includes a display panel and a backlight module 100 of one of the foregoing embodiments. The display panel is disposed opposite to the backlight module 100, and the display panel is fixed on the backlight module 100. The display panel includes a liquid crystal display panel, etc. The liquid crystal display panel may include a first substrate and a second substrate disposed opposite to each other and a liquid crystal layer disposed between the first substrate and the second substrate. Optionally, the display device includes electronic display devices such as mobile phones, televisions, and computers.

[0063] As can be seen from the above embodiments:

[0064] In a backlight module and a display device provided by the present utility model, the backlight module includes a back plate, a light guide plate, a buffer member, and a light source. At least two positioning portions are provided on the bottom plate of the back plate. The light guide plate is provided with notches at positions corresponding to the positioning portions. The light source is disposed on one side of the light guide plate. The buffer member is sleeved on the positioning portion and is located in the notch. At least two positioning portions include a first positioning portion and a second positioning portion located on two opposite sides of the light guide plate. The buffer members corresponding to the first positioning portion and the second positioning portion are both in contact with the edge of the light guide plate away from the light source. Thus, by providing at least two positioning portions, the positioning of the light guide plate can be achieved while avoiding the light guide plate from squeezing the light source, reducing the materials required for positioning the light guide plate, reducing the cost of the backlight module, and thus improving the problem of high material costs caused by setting more positioning blocks and blocking blocks on the backlight module. Moreover, the buffer member sleeved on the positioning portion can not only protect the light guide plate but also buffer the deformation amount generated by the expansion of the light guide plate.

[0065] In the above embodiments, the descriptions of each embodiment have their own focuses. For the parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0066] The embodiments of the present utility model have been introduced in detail above. Specific examples are used herein to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present utility model. Those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A backlight module, characterized in that: include: A back plate, the back plate comprising a bottom plate, the bottom plate being provided with at least two positioning parts, the positioning parts being formed on the bottom plate and being provided integrally with the bottom plate; A light guide plate, the light guide plate is located on the bottom plate, and the light guide plate is provided with a notch at a position corresponding to the positioning portion; A light source, the light source being disposed on one side of the light guide plate; A buffer member, the buffer member is sleeved on the positioning portion and is located in the notch; The at least two positioning portions include a first positioning portion and a second positioning portion located at two opposite sides of the light guide plate, and the corresponding buffers on the first positioning portion and the second positioning portion are both in contact with the edge of the light guide plate away from the light source.

2. The backlight module according to claim 1, characterized in that: The bottom plate is provided with an opening at a position corresponding to the positioning portion, the positioning portion is located at one side of the opening, and the area of ​​the opening is larger than the area of ​​the positioning portion.

3. The backlight module according to claim 1, characterized in that: The back panel also includes a side panel surrounding the bottom panel, the side panel and the bottom panel form a receiving cavity, the light guide plate is located in the receiving cavity, and the positioning portion is located on a side of the light guide plate close to the side panel; in a direction perpendicular to the plane where the bottom panel is located, the height of the positioning portion is less than the height of the side panel.

4. The backlight module according to any one of claims 1 to 3, characterized in that: The light source includes a plurality of light emitting devices arranged at intervals in a first direction, the light guide plate and the light source are arranged at intervals in a second direction, and the first positioning portion and the second positioning portion are both located on a side of the light guide plate close to the light source.

5. The backlight module according to claim 4, characterized in that: The length of the first positioning portion in the second direction is greater than the width of the first positioning portion in the first direction; the length of the second positioning portion in the second direction is greater than the width of the second positioning portion in the first direction.

6. The backlight module according to claim 5, characterized in that: In the second direction, there is a first distance between the first positioning portion and the light guide plate, and there is a second distance between the second positioning portion and the light guide plate, the first distance and the second distance are both less than or equal to the distance between the light guide plate and the light source, and the thickness of the buffer corresponding to the first positioning portion in the second direction is equal to the first distance; The thickness of the buffer member corresponding to the second positioning portion in the second direction is equal to the second distance.

7. The backlight module according to claim 6, characterized in that: The third positioning portion of the at least two positioning portions is located at a side of the light guide plate away from the light source, and the third positioning portion is aligned with one of the first positioning portion and the second positioning portion.

8. The backlight module according to claim 7, characterized in that: The fourth positioning portion of the at least two positioning portions is located at a side of the light guide plate away from the light source, and the fourth positioning portion is aligned with the other of the first positioning portion and the second positioning portion.

9. The backlight module according to claim 8, characterized in that: The length of the third positioning portion in the first direction is greater than the width of the third positioning portion in the second direction; the length of the fourth positioning portion in the first direction is greater than the width of the fourth positioning portion in the second direction.

10. A display device, characterized in that: include: Display panel; According to the backlight module as described in any one of claims 1 to 9, the display panel is arranged opposite to the backlight module.

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