Backlight module and display device

Abstract

A backlight module and a display device. The backlight module comprises: a light guide plate (100) and a plastic frame (200) surrounding the periphery of a light exit surface (100A) of the light guide plate (100); the light guide plate (100) comprises a main body portion (110) and a protruding portion (120), the main body portion (110) is provided with a first through hole (111) penetrating therethrough, and the main body portion (110) comprises a first side edge (112) and a second side edge (113) opposite to each other in a first direction (Y); the protruding portion (120) is formed by the first side edge (112) extending in the first direction (Y) in a direction away from the first through hole (111), the orthographic projection of the first through hole (111) on a first projection surface (W) at least partially overlaps the orthographic projection of the protruding portion (120) on the first projection surface (W), and the first projection surface (W) is perpendicular to the light exit surface (100A) and the first direction (Y); the plastic frame (200) comprises a first side frame (210) corresponding to the first side edge (112), the first side frame (210) is provided with a notch portion (211) at a position corresponding to the protruding portion (120), and the protruding portion (120) at least partially extends into the notch portion (211). In the backlight module and the display device, the structural strength of a local area near the first through hole (111) on the light guide plate (100) is increased, the risk of breakage of the light guide plate (100) in the local area near a blind hole is reduced, and the quality of a display product is improved.

Description

Backlight module and display device

[0001] Cross Reference to Related Applications

[0002] This application claims priority to Chinese Patent Application No. 202410822685.1, filed on June 24, 2024, the contents of which are incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of display, and in particular, to a backlight module and display device. BACKGROUND

[0004] With the development of technology, for a full screen, an ultra-high screen ratio is a key technical direction of display device development. In related technologies, a display device such as a mobile phone, in order to realize full screen display, devices such as a camera and a receiver are arranged in a specific area of a display panel, and a blind hole is designed in a corresponding area in the design of a backlight module. The design of the blind hole has a crucial influence on the full screen. SUMMARY

[0005] Embodiments of the present disclosure provide a backlight module and display device, which can improve product quality.

[0006] The technical solutions provided by the embodiments of the present disclosure are as follows:

[0007] In a first aspect, the embodiments of the present disclosure provide a backlight module, comprising:

[0008] a light guide plate having an outlight surface and a bottom surface arranged oppositely; and

[0009] a glue frame surrounding a periphery of the outlight surface of the light guide plate; wherein

[0010] the light guide plate comprises a main body part and a protruding part, the main body part is provided with a first through hole penetrating through the outlight surface and the bottom surface, the main body part comprises a first side edge and a second side edge opposite in a first direction, and in the first direction, a distance between a center point of the first through hole and the first side edge is smaller than a distance between the center point of the first through hole and the second side edge;

[0011] the protruding part is formed by extending the first side edge in the first direction away from the first through hole, and a normal projection of the first through hole and the protruding part on a first projection surface at least partially overlaps, the first projection surface being perpendicular to the outlight surface and the first direction; the glue frame comprises a first side frame corresponding to the first side edge, the first side frame is provided with a notched part at a position corresponding to the protruding part, and the protruding part at least partially extends into the notched part.

[0012] Exemplarily, the notch portion extends through the first side frame along the first direction.

[0013] Exemplarily, the backlight module further comprises a back plate, the back plate comprises a side plate portion, the side plate portion is located at the periphery of the glue frame.

[0014] Wherein, in the first direction, the area of the first side edge other than the protruding portion has a first gap d1 with the glue frame, the protruding portion has a second gap d2 with the side plate portion; the difference between d1 and d2 is less than or equal to a first threshold value.

[0015] Exemplarily, along a second direction, the protruding portion has opposite first and second edges, the notch portion has opposite first and second side walls, the second direction intersects the first direction; the first edge and the first side wall are located on the same side of the protruding portion, the second edge and the second side wall are located on the same side of the protruding portion; wherein,

[0016] The first edge and the first side wall have a third gap d3 therebetween;

[0017] The second edge and the second side wall have a fourth gap d4 therebetween;

[0018] The difference between any two of d1, d2, d3 and d4 is less than or equal to a second threshold value.

[0019] Exemplarily, the orthographic projection of the protruding portion on the first projection plane completely covers the orthographic projection of the first through hole on the first projection plane.

[0020] Exemplarily, the protruding portion has a first width along the extension direction of the first side edge, the first through hole has a second width along the extension direction of the first side edge; wherein the orthographic projection of the center point of the protruding portion and the center point of the first through hole on the first projection plane coincide, and the first width is greater than or equal to the second width.

[0021] Exemplarily, along a second direction, the notch portion has opposite first and second side walls, the second direction intersects the first direction; the first and second side walls are both inclined surfaces or curved surfaces, and the inclined surfaces or curved surfaces are configured such that the opening size of the notch portion on the side close to the light guide plate is greater than the opening size on the side away from the light guide plate in the first direction.

[0022] Exemplarily, along the second direction, the protruding portion has opposite first and second edges, the first edge is on the same side of the protruding portion as the first sidewall, the first edge is a bevel or an arc surface that is shaped to fit the first sidewall, the second edge is on the same side of the protruding portion as the second sidewall, and the second edge is a bevel or an arc surface that is shaped to fit the second sidewall.

[0023] Exemplarily, when the first and second sidewalls are bevels, an included angle a of either of the first and second sidewalls with respect to the second direction is in a range of 135±10°.

[0024] Exemplarily, the backlight module further comprises:

[0025] a back plate comprising a bottom plate portion and a side plate portion, the bottom plate portion is located on a side of a bottom surface of the light guide plate, and the side plate portion is located on a periphery of the frame; and

[0026] a light-shielding adhesive tape comprising a tape main body portion and an extension portion; wherein

[0027] the frame comprises opposite top and bottom portions along a third direction, and the top portion is toward a light-out direction of the light guide plate, and the third direction is perpendicular to the light-out surface;

[0028] the tape main body portion is wrapped around a periphery of the light guide plate and attached to a surface of the top portion, and the extension portion is arranged at a position corresponding to the protruding portion, and extends from the tape main body portion and is folded toward a side where the bottom plate portion is located and attached to the side plate portion.

[0029] Exemplarily, the extension portion has a third width along an extension direction of the first side edge, and the notch portion has a fourth width along the extension direction of the first side edge, and the third width is greater than or equal to the fourth width.

[0030] Exemplarily, the backlight module further comprises:

[0031] a back plate comprising a side plate portion, the side plate portion is located on a periphery of the frame, the side plate portion has a top edge that is toward a light-out direction of the light guide plate, and the top edge of the side plate portion is provided with a folding edge that extends along the first direction toward the light guide plate at a position corresponding to the notch portion; and

[0032] a light-shielding adhesive tape, the frame comprises a top surface that is toward the light-out direction of the light guide plate, and the light-shielding adhesive tape is wrapped around a periphery of the light guide plate and attached to the surface of the top portion and the folding edge.

[0033] Exemplarily, the one side of the folding edge for attaching the light shielding tape is in the same plane as the surface of the top portion.

[0034] Exemplarily, the adhesive frame comprises a first side frame corresponding to the first side edge, the first side frame has a sixth width along the first direction, and the folding edge has a seventh width along the first direction, wherein the difference between the sixth width and the seventh width is less than or equal to a third threshold value.

[0035] Exemplarily, the backlight module further comprises:

[0036] a back plate comprising a bottom plate portion located at one side of the bottom surface of the light guide plate and a side plate portion located at the periphery of the adhesive frame; and

[0037] a side light shielding layer, the surface of the side plate portion located away from the first through hole along the first direction is an outer side surface;

[0038] wherein the side light shielding layer is located at the position corresponding to the convex portion and covers at least part of the outer side surface of the side plate portion.

[0039] Exemplarily, the film layer thickness of the side light shielding layer in the direction perpendicular to the outer side surface is less than or equal to 0.2 mm.

[0040] Exemplarily, the side plate portion has a bottom edge connected to the bottom plate portion, and in the third direction perpendicular to the light emitting surface, the distance between the side light shielding layer and the bottom edge is greater than or equal to 0.

[0041] Exemplarily, in the third direction perpendicular to the light emitting surface, the width of the side light shielding layer covering the side plate portion is greater than or equal to 0.2 mm.

[0042] Exemplarily, the backlight module further comprises:

[0043] a back plate comprising a bottom plate portion located at one side of the bottom surface of the light guide plate, the bottom plate portion is provided with a second through hole, the orthographic projection of the second through hole on the bottom surface at least partially overlaps the orthographic projection of the first through hole on the bottom surface, and the area of the bottom plate portion adjacent to the second through hole is provided with a sunken area;

[0044] a reflective sheet located between the bottom plate portion and the light guide plate, the reflective sheet is provided with a third through hole, the area of the orthographic projection of the third through hole on the bottom surface is less than the area of the orthographic projection of the first through hole on the bottom surface, so that at least part of the area of the reflective sheet adjacent to the third through hole is not covered by the light guide plate, to form a first reflection area, and the first reflection area and the sunken area are fixed by adhesive.

[0045] Exemplarily, the sinking region has a sinking height along the third direction of 0.03±0.01mm; the sinking region has a width along the radial direction of the second through hole of 0.55±0.15mm; the adhesive has a thickness along the third direction of 0.03±0.01mm; the adhesive has a width along the radial direction of the third through hole of 0.2±0.1mm; the distance between the edge of the adhesive and the edge of the sinking region is 0.2±0.1mm; the first reflecting region has a width along the radial direction of the third through hole of 0.3-0.5mm; the edge of the third through hole is radially outwardly widened by 0.3mm-0.15mm compared with the edge of the second through hole.

[0046] Exemplarily, the bottom plate portion has a first surface facing the reflecting sheet, and a difference between the sinking height of the sinking region along the third direction relative to the first surface and the thickness of the adhesive is less than or equal to a fourth threshold value.

[0047] In a second aspect, the embodiments of the present disclosure further provide a display device, comprising:

[0048] a display panel; and

[0049] a backlight module as described above.

[0050] Exemplarily, the display panel comprises a display region, the display region comprises a first area and a second area surrounding the first area, the first area at least partially coincides with the orthographic projection of the first through hole on the light emitting surface, and the display panel comprises a first side corresponding to the first side edge, wherein in the first direction, the distance between the first side and the first area is less than or equal to 1.88mm.

[0051] The embodiments of the present disclosure bring the following beneficial effects:

[0052] In the above scheme, the convex portion is locally outwardly extended along the first direction on the first side edge close to the first through hole in the main body portion of the light guide plate, and the notch portion is arranged on the glue frame at a position corresponding to the convex portion to avoid the convex portion, so that the space of the corresponding blind hole position on the glue frame is avoided for the light guide plate, the distance from the first through hole to the edge of the light guide plate in the first direction is increased, and thus the structural strength of the local area near the first through hole on the light guide plate is increased, the risk of fracture of the local area near the blind hole of the light guide plate is reduced, and the quality of the display product is improved. BRIEF DESCRIPTION OF DRAWINGS

[0053] FIG. 1 shows a front view of a backlight module provided in some embodiments of the present disclosure;

[0054] Figure 2 shows one of the partial structure enlarged views of the position of the dashed box B in Figure 1;

[0055] Figure 3 shows another of the partial structure enlarged views of the position of the dashed box B in Figure 1;

[0056] Figure 4 shows a third of the partial structure enlarged views of the position of the dashed box B in Figure 1;

[0057] Figure 5 shows a cross-sectional structure schematic view of the position a in Figure 4;

[0058] Figure 6 shows a cross-sectional structure schematic view of the position b in Figure 4;

[0059] Figure 7 shows a fourth of the partial structure enlarged views of the position of the dashed box B in Figure 1;

[0060] Figure 8 shows a cross-sectional structure schematic view of the position a in Figure 7;

[0061] Figure 9 shows a cross-sectional structure schematic view of the position b in Figure 7;

[0062] Figure 10 shows a fifth of the partial structure enlarged views of the position of the dashed box B in Figure 1;

[0063] Figure 11 shows a cross-sectional structure schematic view of the position b in Figure 10;

[0064] Figure 12 shows a light path schematic view of the partial structure of the position of the dashed box B in Figure 1;

[0065] Figure 13 shows light efficiency schematic views of the reflective sheet in the backlight module being offset, wherein (a) shows a light efficiency schematic view of the reflective sheet being in a target position, and (b) shows a light efficiency schematic view of the reflective sheet being positionally offset;

[0066] Figure 14 shows a cross-sectional structure schematic view of the backlight module in some embodiments of the present disclosure;

[0067] Figure 15 shows a partial structure enlarged view of the position of the dashed box C in Figure 14;

[0068] Figure 16 shows a light efficiency test point distribution position schematic view;

[0069] Figure 17 shows one of the partial structure schematic views of the injection mold of the glue frame;

[0070] Figure 18 shows another of the partial structure schematic views of the injection mold of the glue frame;

[0071] Figure 19 shows structure schematic views of the light shielding adhesive tape and the protective film, wherein (a) shows a schematic view of the light shielding adhesive tape, (b) shows a schematic view of the protective film, and (c) shows a schematic view of the light shielding adhesive tape and the protective film being combined together;

[0072] FIG. 20 shows a schematic diagram of a process of edge covering of the light shielding tape;

[0073] FIG. 21 shows a schematic diagram of a process of edge folding;

[0074] FIG. 22 shows a schematic diagram of a process of oblique insertion of the light guide plate;

[0075] FIG. 23 shows a schematic diagram of a process of forming a sunken area by ribbing;

[0076] FIG. 24 shows a schematic diagram of a process of die cutting of the reflective sheet and the adhesive; DETAILED DESCRIPTION

[0077] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of, rather than all of, the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without any inventive effort belong to the scope of protection of the present disclosure.

[0078] Unless otherwise defined, technical terms or scientific terms used in the present disclosure should be understood as having the same meaning as commonly understood by a person of ordinary skill in the art to which the present disclosure belongs. The terms "first", "second" and similar terms used in the present disclosure do not denote any order, quantity or importance, but are used to distinguish different components. Similarly, the terms "one", "a" or "the" and similar terms do not denote quantity limitation, but mean that there is at least one. The terms "include", "contain" and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, without excluding other elements or objects. The terms "connect" or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right" and the like are only used to represent relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships can also be changed accordingly.

[0079] Before the backlight module and display device provided by the embodiments of the present disclosure are described in detail, the related art is described as follows:

[0080] With the development of science and technology, for a full-screen display device, an ultra-high screen ratio is a key technical direction of the development of display devices. In the related art, in order to realize full-screen display, display devices such as mobile phones set devices such as cameras and receivers in a specific area of a display panel, and blind holes are dug in the corresponding specific area when designing a backlight module.

[0081] In order to realize the blind hole design, it is necessary to dig holes on the backlight module, such as digging holes on the light guide plate, back plate and optical film material of the backlight module and the like.

[0082] The design of the blind hole has a crucial influence on the full screen. When the blind hole is designed, there are two important parameter specifications: the blind hole shape size and the blind hole positioning size. The blind hole positioning size refers to the distance between the side edge of the display panel closest to the blind hole and the blind hole.

[0083] The area space between the side edge of the display panel closest to the blind hole and the blind hole is small, and complex pictures cannot be displayed, resulting in resource waste. Therefore, compressing the blind hole positioning size can greatly improve the screen ratio and bring better visual experience. However, if the blind hole positioning size is further compressed to improve the screen ratio, the following problems will exist: the light guide plate will shrink due to the influence of temperature in application, which may cause interference between the side of the light guide plate close to the blind hole and the rubber frame. If the local area strength of the light guide plate near the blind hole is insufficient, cracks will be generated.

[0084] The local area strength of the light guide plate near the blind hole can be determined by the hole pull-out force. The general specification of the hole pull-out force of the light guide plate is ≥50N. Through split verification on the physical object, it is found that if the blind hole positioning size is directly reduced, there is a risk that the hole pull-out force of the local area of the light guide plate near the blind hole does not meet the specification.

[0085] In order to solve the above problems, the backlight module and the display device provided by the embodiments of the present disclosure can improve the screen ratio and avoid the problem of insufficient local area strength of the light guide plate near the blind hole, thereby improving the product quality.

[0086] As shown in FIGS. 1 and 6, the backlight module provided by the embodiments of the present disclosure includes a light guide plate 100 and a rubber frame 200. The light guide plate 100 has an opposite light exit surface 100A and a bottom surface 100B. The rubber frame 200 surrounds the four sides of the light exit surface 100A of the light guide plate 100, that is, the rubber frame 200 is arranged around the periphery of the light guide plate 100.

[0087] The light guide plate 100 includes a main body part 110 and a protruding part 120. The main body part 110 is provided with a first through hole 111 penetrating through the light exit surface 100A and the bottom surface 100B. The first through hole 111 is a blind hole A corresponding to the hole dug on the light guide plate 100.

[0088] The main body part 110 includes a first side edge 112 and a second side edge 113 opposite in a first direction Y. The first direction Y is a direction parallel to the light exit surface 100A.

[0089] In the first direction Y, the distance between the center point O of the first through hole 111 and the first side edge 112 is smaller than the distance between the center point O of the first through hole 111 and the second side edge 113, that is, the first side edge 112 is closer to the first through hole 111 than the second side edge 113;

[0090] The protruding portion 120 is formed by the first side edge 112 extending away from the first through hole 111 in the first direction Y, and the protruding portion 120 corresponds to the position of the first through hole 111, and the orthographic projection of the first through hole 111 and the protruding portion 120 on a first projection plane W at least partially overlaps, the first projection plane W being perpendicular to the light emitting surface 100A and the first direction Y;

[0091] The glue frame 200 includes a first side frame 210 corresponding to the first side edge 112, and the first side frame 210 is provided with a notched portion 211 at a position corresponding to the protruding portion 120, and the protruding portion 120 at least partially extends into the notched portion 211.

[0092] In the above scheme, the protruding portion 120 is formed by locally extending outward along the first side edge 112 closest to the first through hole 111 in the first direction Y in the main body portion 110, and the notched portion 211 is provided on the glue frame 200 to avoid the protruding portion 120, so that the space on the glue frame 200 corresponding to the position of the blind hole A is avoided to the light guide plate 100, thereby increasing the distance from the first through hole 111 to the edge of the light guide plate 100 in the first direction Y, thereby increasing the structural strength of the local area near the first through hole 111 on the light guide plate 100, reducing the risk of fracture of the local area near the blind hole A on the light guide plate 100, and improving the quality of the display product.

[0093] When the backlight module is applied to a display device, due to the presence of the protruding portion 120, the position design of the first through hole 111 (i.e., the blind hole A) can be more flexible. The blind hole positioning size can remain unchanged or be further reduced compared to the related art.

[0094] For example, in the related art, the blind hole positioning size can be 1.88 mm. By applying the backlight module provided by the embodiment of the present disclosure, the blind hole positioning size can be further compressed to a size smaller than 1.88 mm. For example, considering the size of the avoiding space of the glue frame 200 and other factors, the blind hole positioning size can be compressed to about 1.48 mm.

[0095] It is to be understood that the numerical values stated in this application are not to be taken as absolute definitions, but rather as a range of values around the stated value. For example, each numerical value can include a range of variation of less than or equal to 10% of the value, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to 3%, less than or equal to 2%, less than or equal to 1%, less than or equal to 0.5%, less than or equal to 0.1%, less than or equal to 0.05%, etc.

[0096] For example, the second side edge 113 can be located at the light-in side 100C of the light guide plate 100, and the first side edge 112 is opposite to the light-in side 100C, that is, the first through hole 111 can be arranged near the opposite side 100D along the first direction Y. However, in actual applications, the first side edge 112 can be other side edges of the light guide plate 100, and is not limited thereto.

[0097] In addition, if it is desired to compress the positioning size of the blind hole as much as possible, the extension length of the protruding portion along the first direction Y can be increased as much as possible. For example, as shown in FIGS. 1 to 6, the notch portion 211 penetrates the first side frame 210 along the first direction Y. In this way, the space size of the first side frame 210 along the first direction Y is used entirely to avoid the protruding portion 120, which can increase the design space of the protruding portion 120, increase the extension length of the protruding portion 120 along the first direction Y, and increase the structural strength of the local area of the light guide plate 100 near the first through hole 111.

[0098] In some example embodiments, the size of the first side frame 210 along the first direction Y is 0.4 mm, and the extension length of the protruding portion 120 along the first direction Y relative to the first side edge 112 can be 0.4 mm. It is to be understood that the numerical values stated in this application are not to be taken as absolute definitions, but rather as a range of values around the stated value. For example, each numerical value can include a range of variation of less than or equal to 10% of the value, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to 3%, less than or equal to 2%, less than or equal to 1%, less than or equal to 0.5%, less than or equal to 0.1%, less than or equal to 0.05%, etc.

[0099] It is to be further understood that the above is only an example, and in other embodiments not shown, the notch portion 211 can also not penetrate the first side frame 210 along the first direction Y.

[0100] In some exemplary embodiments, as shown in FIGS. 5 and 6, the backlight module can further include a back plate 300, which includes a bottom plate portion 310 located at one side of the bottom surface 100B and a side plate portion 320 located at the periphery of the frame 200. The back plate 300 can be made of a hard material such as metal, which serves to support and fix the frame 200 and the light guide plate 100 and other components of the backlight module.

[0101] For example, as shown in FIG. 2, in the first direction Y, the region of the first side edge 112 other than the protruding portion 120 has a first gap d1 with the frame 200, i.e., the main body portion 110 has a first gap d1 with the frame 200, and the protruding portion 120 has a second gap d2 with the side plate portion 320; wherein the difference between d1 and d2 is less than or equal to a first threshold value.

[0102] In the above scheme, the gap in the first direction Y between the protruding portion 120 and the side plate portion 320 of the light guide plate 100 can be greater than or equal to the gap in the first direction Y between the region other than the protruding portion 120 and the frame 200. In this way, it can be ensured that during assembly of the backlight module, the protruding portion 120 does not first contact the side plate portion 320, which would affect the structural strength of the protruding portion 120.

[0103] In some exemplary embodiments, the first threshold value can be equal to 0 or a value close to 0. For example, the first threshold value can include a variation range of less than or equal to 10% of 0, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to 3%, less than or equal to 2%, less than or equal to 1%, less than or equal to 0.5%, less than or equal to 0.1%, less than or equal to 0.05%, etc.

[0104] In the above scheme, the first gap d1 between the main body portion 110 and the frame 200 and the second gap d2 between the protruding portion 120 and the side plate portion 320 are substantially the same. In this way, it is ensured that the protruding portion 120 does not first contact the back plate 300 during assembly, and at the same time, it is ensured that the amount of light passing through the first gap d1 and the second gap d2 at the first side edge 112 is more uniform.

[0105] In some example embodiments, as shown in FIG. 2 and FIG. 3, the protruding portion 120 has opposite first and second edges 121 and 122 along a second direction X, the recessed portion 211 has opposite first and second side walls 2111 and 2112 along the second direction X, the second direction X is perpendicular to the first direction Y, and the second direction X is parallel to the light exit face 100A. For example, the second direction X is the extension direction of the first side edge 110.

[0106] In some example embodiments, as shown in FIG. 2 and FIG. 3, the protruding portion 120 has opposite first and second edges 121 and 122 along a second direction X, the recessed portion 211 has opposite first and second side walls 2111 and 2112 along the second direction X, the second direction X is perpendicular to the first direction Y, and the second direction X is parallel to the light exit face 100A. For example, the second direction X is the extension direction of the first side edge 110.

[0107] In some example embodiments, as shown in FIG. 2 and FIG. 3, the protruding portion 120 has opposite first and second edges 121 and 122 along a second direction X, the recessed portion 211 has opposite first and second side walls 2111 and 2112 along the second direction X, the second direction X is perpendicular to the first direction Y, and the second direction X is parallel to the light exit face 100A. For example, the second direction X is the extension direction of the first side edge 110.

[0108] In some example embodiments, as shown in FIG. 2 and FIG. 3, the protruding portion 120 has opposite first and second edges 121 and 122 along a second direction X, the recessed portion 211 has opposite first and second side walls 2111 and 2112 along the second direction X, the second direction X is perpendicular to the first direction Y, and the second direction X is parallel to the light exit face 100A. For example, the second direction X is the extension direction of the first side edge 110.

[0109] In some example embodiments, as shown in FIG. 2 and FIG. 3, the protruding portion 120 has opposite first and second edges 121 and 122 along a second direction X, the recessed portion 211 has opposite first and second side walls 2111 and 2112 along the second direction X, the second direction X is perpendicular to the first direction Y, and the second direction X is parallel to the light exit face 100A. For example, the second direction X is the extension direction of the first side edge 110.

[0110] In some exemplary embodiments of the present disclosure, as shown in FIGS. 1 and 2, the protruding portion 120 has a first width L1 along the extension direction of the first side edge 112, and the first through hole 111 has a second width L2 along the extension direction of the first side edge 112; wherein the center point O' of the protruding portion 120 along the extension direction of the first side edge 112 and the center point O of the first through hole 111 are coincident in the orthographic projection on the first projection plane W, and the first width L1 is greater than or equal to the second width L2.

[0111] With the above scheme, in order to ensure that the orthographic projection of the protruding portion 120 on the first projection plane W completely covers the orthographic projection of the first through hole 111 on the first projection plane W, the center point O' of the protruding portion 120 and the center point O of the first through hole 111 are aligned in the first direction Y, and the width of the protruding portion 120 along the extension direction of the first side edge 112 is greater than or equal to the size of the first through hole 111, so that the structural strength of the blind hole hole peripheral region on the side away from the second side edge 113 is substantially uniform.

[0112] It should be noted that the orthographic projection shape of the protruding portion 120 on the plane where the light emitting surface 100A is located can include but is not limited to a rectangle, a sector, or a trapezoid, etc.

[0113] For example, as shown in FIG. 2, along the second direction X, the notch portion 211 has opposite first and second side walls 2111 and 2112, the second direction X is perpendicular to the first direction Y, and the second direction X is parallel to the light emitting surface 100A. Wherein the first and second side walls 2111 and 2112 are configured as inclined or curved surfaces, and the inclined or curved surfaces are configured such that the opening size of the notch portion 211 on the side close to the light guide plate 100 in the first direction Y is greater than the opening size on the side away from the light guide plate 100.

[0114] As part of the light is blocked by the structure of the blind hole A position, the light is sparse and low in brightness on the side of the blind hole A away from the light source, resulting in the phenomenon that the surrounding area on the side of the blind hole A away from the light source is dark. The side of the first through hole 111 away from the light source in the first direction Y is regarded as the rear area of the hole. In the above scheme, by configuring the first side wall 2111 and the second side wall 2112 as inclined surfaces or curved surfaces, and configuring the inclined surfaces or curved surfaces such that the opening size of the recessed part 211 on the side close to the light guide plate 100 in the first direction Y is greater than the opening size on the side away from the light guide plate 100, in other words, at least part of the first side wall 2111 and the second side wall 2112 faces the blind hole A, so that the light emitted by the light guide plate 100 can be reflected back into the light guide plate 100 by the first side wall 2111 and the second side wall 2112, and at least part of the light is reflected back to the side of the blind hole A away from the light entrance side 100C of the light guide plate 100 (i.e. the rear area of the hole), thereby making up for the defect that the area is dark.

[0115] In some exemplary embodiments, the glue frame 200 can be white, and the first side wall 2111 and the second side wall 2112 have better light reflection. However, it is not limited thereto.

[0116] In some exemplary embodiments, as shown in FIG. 2, the first edge 121 is an inclined surface or a curved surface matched with the shape of the first side wall 2111; the second edge 122 is on the same side of the protruding part 120 as the second side wall 2112, and the second edge 122 is an inclined surface or a curved surface matched with the shape of the second side wall 2112. In this way, the shape of the protruding part and the recessed part 211 can be further matched to ensure the uniformity of the light in the gap between the light guide plate 100 and the glue frame 200.

[0117] In addition, as shown in FIG. 3, when the first side wall 2111 and the second side wall 2112 are inclined surfaces, the protruding part 120 is a trapezoid, and the included angle α of either of the first side wall 2111 and the second side wall 2112 relative to the second direction X is in the range of 135±10°. However, it is not limited thereto, and in actual application, the included angle α can be selected in combination with the size of the recessed part 211.

[0118] In some exemplary embodiments, as shown in FIG. 2, the protruding portion 120 further comprises a third edge 123, which is a side edge of the protruding portion 120 located away from the first through hole 111 in the first direction Y, and the width of the third edge 123 along the extension direction of the first side edge 112 is greater than or equal to the width (i.e., the second width L2) of the first through hole 111 along the extension direction of the first side edge 112.

[0119] As shown in FIG. 2, the bottom plate portion 310 is provided with a second through hole 311, the second through hole 311 at least partially overlaps the orthographic projection of the first through hole 111 on the bottom surface 100B, and the inner diameter of the second through hole 311 is smaller than the inner diameter of the first through hole 111. The center of the first through hole 111 coincides with the center of the second through hole 311, and the difference between the inner diameters of the first through hole 111 and the second through hole 311 is 0.5 mm, i.e., the distance between the hole edges of the first through hole 111 and the second through hole 311 is 0.25 mm. It should be noted that the numerical values in the present application are not absolute definitions, but express a certain range of variation within a reference numerical value. For example, a variation range of less than or equal to 10% of each numerical value, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to 3%, less than or equal to 2%, less than or equal to 1%, less than or equal to 0.5%, less than or equal to 0.1%, less than or equal to 0.05%, etc.

[0120] In the embodiments of the present disclosure, the notch portion 211 is arranged on the glue frame 200, and the notch portion 211 has a simple forming process and can be adjusted by the injection mold of the glue frame in the related art.

[0121] Specifically, as shown in FIG. 17, a corresponding concave cavity 21 can be designed at the position of the protruding portion 120 of the injection mold 20 of the glue frame. It should be noted that in order to ensure the quality of injection molding, there should be no glue pulling holes 22 in the concave cavity 21, otherwise it will cause sealing problems, and then the reliability of water vapor will penetrate into the mold cavity, and then affect the quality of the glue frame 200. In order to avoid the above sealing problem, as shown in FIG. 18, glue pulling holes 22 can be arranged on both sides of the concave cavity 21, and the closest distance D between the glue pulling holes 22 and the concave cavity is 2 mm. Unless otherwise stated, the numerical values in the present application are not absolute definitions, but express a certain range of variation within a reference numerical value. For example, a variation range of less than or equal to 10% of each numerical value, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to 3%, less than or equal to 2%, less than or equal to 1%, less than or equal to 0.5%, less than or equal to 0.1%, less than or equal to 0.05%, etc.

[0122] In addition, in some example embodiments of the present disclosure, as shown in FIG. 4, the backlight module further comprises a light shielding tape 400, which is used to be attached between the frame 200 and the display panel to prevent light leakage around the light guide plate 100. However, due to the design of the notch part 211, the frame 200 is missing at the local position corresponding to the notch part 211, which may cause the light shielding tape 400 to be unable to be fixed at the notch part 211.

[0123] To improve the above problems, in some example embodiments of the present disclosure, as shown in FIGS. 1-6, the backlight module further comprises a light shielding tape 400, which comprises a tape main part 410 and an extension part 420; wherein the frame 200 comprises a top part 200A and a bottom part 200B opposite along the third direction Z, and the top part 200A is towards the light emitting direction of the light guide plate 100, and the third direction Z is perpendicular to the light emitting surface 100A; the tape main part 410 is wrapped around the periphery of the light guide plate 100 and attached on the surface of the top part 200A; the extension part 420 is arranged at the position corresponding to the protruding part 120, and extends from the tape main part 410 and is folded towards the side where the back plate part 310 is located and attached on the side plate part 320 to edge cover the side plate part 320.

[0124] By using the above scheme, the light shielding tape 400 is designed to be partially extended at the position corresponding to the notch part 211 to form the extension part 420, and the extension part 420 is folded and attached on the outer side of the side plate part 320 of the back plate 300, which can effectively prevent light leakage.

[0125] In some example embodiments, as shown in FIG. 4, the extension part 420 has a third width L3 along the extension direction of the first side edge 112, and the notch part 211 has a fourth width L4 along the extension direction of the first side edge 112, and the third width L3 is greater than or equal to the fourth width L4.

[0126] In this way, the extension part 420 can completely cover the notch part 211 to further ensure the light leakage prevention effect.

[0127] It should be noted that the fourth width L4 is the maximum opening dimension of the notch part 211 along the second direction X.

[0128] As shown in FIG. 6, the extension part 420 extends from the tape main part 410 and is attached on the side plate part 320 after being folded, and the overlapping size Q of the extension part 420 along its extension direction with the side plate part 320 needs to be long enough to ensure the adhesion.

[0129] For example, Q is greater than or equal to 0.7 mm. However, it is not limited to this.

[0130] In this embodiment, the light-shielding tape 400 is provided with the extension portion 420, and the molding process of the extension portion 420 is simple. The light-shielding tape 400 can be obtained by cutting raw materials with a die-cutting knife during manufacturing. When forming the extension portion 420, the die-cutting knife in related technologies can be adjusted accordingly.

[0131] Specifically, as shown in Figure 19, the light-shielding tape 400 is covered with a protective film 40 during die-cutting. Considering that the extension 420 will be folded back and edge-wrapped after die-cutting, the protective film 40 can avoid the extension 420. The protective film 40 is not made to protrude, that is, the protective film 40 does not cover the extension 420.

[0132] The light-shielding tape 400 can be edge-wrapped using a tape wrapping process. For example, as shown in Figure 20, the edge wrapping is completed by pressing the extension 420 on the light-shielding tape 400 using a pressure head 50 on an edge-wrapping device. It should be noted that the light-shielding tape 400 is adhesive and easily bonds to the pressure head. This bonding problem can be solved by wrapping a layer of silicone release paper around the surface of the pressure head 50.

[0133] In some other exemplary embodiments, as shown in Figures 7 to 9, the side plate portion 320 has a top edge 321 and a bottom edge 322 opposite to each other in the third direction Z. The bottom edge 322 is connected to the bottom plate portion 310. The top edge 321 has a folded edge 323 extending in the first direction Y toward the light guide plate 100 at a position corresponding to the recess 211. The frame 200 includes a top surface 200A facing the light emission direction of the light guide plate 100. The light-shielding tape 400 surrounds the periphery of the light guide plate 100 and is attached to the top surface 200A and the folded edge 323.

[0134] By adopting the above solution, the side plate portion 320 is folded inward at the position corresponding to the notch portion 211 to compensate for the lack of the adhesive frame 200 of the notch portion 211, providing an attachment surface for the light-blocking tape 400, which can effectively prevent light leakage.

[0135] In some example embodiments, the side of the folded edge 323 for attaching the light shielding tape 400 is in the same plane as the surface of the top portion 200A, so as to ensure that the light shielding tape 400 is flat and not prone to wrinkles. It should be noted that the term "in the same plane" can mean that the two surfaces are arranged along the same plane within a range of microns, for example, within 40 μm, 30 μm, 20 μm, 10 μm or 1 μm along the same plane.

[0136] As shown in FIGS. 7 and 9, in some example embodiments, the folded edge 323 has a fifth width L5 along the extension direction of the first side edge 112, and the notch portion 211 has a fourth width L4 along the extension direction of the first side edge 112, and the fifth width L5 is greater than or equal to the fourth width L4, so that the folded edge 323 can completely cover the notch portion 211, further ensuring the light leakage prevention effect.

[0137] In some example embodiments, as shown in FIG. 7, the first side frame 210 has a sixth width L6 along the first direction Y, and the folded edge 323 has a seventh width L7 along the first direction Y, and the difference between the sixth width L6 and the seventh width L7 is less than or equal to a third threshold value.

[0138] For example, the third threshold value can be a value equal to 0 or close to 0. Specifically, the third threshold value can include a variation range of less than or equal to 10% of 0, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to 3%, less than or equal to 2%, less than or equal to 1%, less than or equal to 0.5%, less than or equal to 0.1%, less than or equal to 0.05%, etc. In this way, it can be further ensured that the light shielding effect of the light shielding tape 400 at the folded edge 323 and at the first side frame 210 is substantially the same.

[0139] In the embodiments of the present disclosure, when the back plate 300 is manufactured, the folded edge 323 can be formed by two stamping processes. Specifically, referring to FIG. 21, the stamping process is sequentially performed from (a) to (d) in the figure. First, referring to FIGS. 21(a) and (b), the first stamping die 61 is used to perform first stamping on the back plate 300 prototype material, so that the side plate portion 320 is bent relative to the bottom plate portion 310; then, referring to FIGS. 21(c) and (d), the second stamping die 62 is used to perform second stamping on the local position of the side plate portion 320, so as to obtain the folded edge 323.

[0140] It should be noted that, due to the partial position of the side plate part 320 forming the folded edge 323, as shown in FIG. 22, the light guide plate 100 can be inserted obliquely when the light guide plate 100 and the back plate 300 are assembled. First, referring to (a) and (b) of FIG. 22, the side of the light guide plate 100 provided with the protruding part is first inserted obliquely into the space formed by the folded edge 323 and the bottom plate; after being inserted obliquely to the target position, referring to (c) of FIG. 22, the light guide plate 100 is then placed flat.

[0141] In addition, in some other exemplary embodiments, as shown in FIGS. 10 and 11, the backlight module further comprises:

[0142] An optical film material 700 is located on the light exit surface 100A side of the light guide plate 100;

[0143] A side light shielding layer 800, the surface of the side plate part 320 located away from the first through hole 111 along the first direction Y is an outer side S1, the side light shielding layer 800 is located at the position corresponding to the protruding part 120, and at least covers part of the outer side S1.

[0144] With the above scheme, the side light shielding layer 800 can be formed by coating a light shielding material on the side of the backlight module (i.e., the outer side S1), that is, by side coating glue at the position corresponding to the notch part 211, which can effectively shield light leakage.

[0145] It should be noted that when the backlight module of the present disclosure is applied to a display device, an optical adhesive layer 11 and a polarizing plate 12 are further provided between the display panel 10 and the backlight module, and a protective cover plate 13 is further provided on the light exit side of the display panel 10. The side light shielding layer 800 extends from the outer side S1 in the direction of the display panel 10 and covers the optical adhesive layer 11, the polarizing plate 12, the display panel 10, etc., and extends to the side of the protective cover plate close to the display panel 10, so as to effectively shield light leakage.

[0146] If the thickness of the side light shielding layer 800 is too thick, the height of the protruding outer side S1 is too high, which may interfere with the whole machine shell, etc. If the thickness is too small, it will affect the light shielding effect. Therefore, for example, the film layer thickness h3 of the side light shielding layer 800 in the direction perpendicular to the outer side S1 is less than or equal to 0.2 mm. In other words, the thickness h3 of the side coating glue can be less than or equal to 0.2 mm, which can meet the light shielding effect and reduce the risk of interference with the whole machine shell, etc. However, this is not limited.

[0147] In addition, in some exemplary embodiments, the side light shielding layer 800 has an eighth width L8 along the extension direction of the first side edge 112, and the notch portion 211 has a fourth width L4 along the extension direction of the first side edge 112, and the eighth width L8 is greater than or equal to the fourth width L4, so that the side light shielding layer 800 can completely cover the notch portion 211, thereby further ensuring the light leakage prevention effect.

[0148] In addition, in some exemplary embodiments, as shown in FIG. 11, the side plate portion 320 has a bottom edge 322 connected with the bottom plate portion 310, and the distance d5 between the side light shielding layer 800 and the bottom edge 322 in the third direction Z perpendicular to the light emitting surface 100A is greater than or equal to 0. With the above scheme, the side light shielding layer 800 can cover a part of the side plate portion 320 in the third direction Z, but does not cover the bottom plate portion 310, i.e., the back light side of the back plate 300, thereby further ensuring the avoidance of interference with the whole machine shell and the like in the third direction Z.

[0149] If the size of the side light shielding layer 800 covering the side plate portion 320 in the third direction Z is too small, there may be a problem of insufficient adhesion. Therefore, in some exemplary embodiments, the width of the side light shielding layer 800 covering the side plate portion 320 in the third direction Z perpendicular to the light emitting surface 100A is greater than or equal to 0.2 mm, so as to ensure no light leakage. In some embodiments, the total thickness h4 of the side light shielding layer 800 in the third direction Z can be greater than or equal to 0.7 mm. However, it is not limited thereto.

[0150] In the backlight module provided in the present embodiment, the side light shielding layer 800 can be realized by a dispensing process. Specifically, in the dispensing process, the glue tank temperature, the feeding port temperature, and the spray valve temperature have a great influence on the viscosity of the glue, and the pre-glue amount and the pre-glue end amount have a great influence on the thickness and width of the glue. During the dispensing process, a number of products need to be sampled every hour to confirm whether the glue thickness and glue width meet the requirements. After the glue coating is completed, the products need to be placed for curing.

[0151] It should be noted that in order to improve the problem of light leakage that may occur at the position of the notch portion 211, only a few embodiments are listed above, and in actual application, the backlight module can also be any combination of the above several embodiments, and the combination modes of the above several embodiments will not be listed one by one.

[0152] In addition, in some exemplary embodiments, as shown in FIG. 13, the backlight module further comprises a reflective sheet 900 located between the bottom plate portion 310 and the light guide plate 100. After the light source in the backlight module emits light into the light guide plate 100, part of the light is incident on the light guide plate 100 for total reflection, and part of the light incident on the dots of the light guide plate 100 will break the total reflection. The part of the light that breaks the total reflection will be emitted from the bottom surface 100B of the light guide plate 100 to the reflective sheet 900, and the reflective sheet 900 will reflect this part of the light back to the light guide plate 100 and emit it from the light emitting surface 100A of the light guide plate 100.

[0153] In some exemplary embodiments of the present disclosure, as shown in (a) of FIG. 13, the reflective sheet 900 is provided with a third through hole 910, and the area of the third through hole 910 on the bottom surface 100B is smaller than the area of the first through hole 111 on the bottom surface 100B, so that at least part of the area of the reflective sheet 900 adjacent to the third through hole 910 forms a first reflection area S2 not covered by the light guide plate 100; the bottom plate portion 310 of the back plate 300 is provided with a second through hole 311, and the second through hole 311 at least partially overlaps the first through hole 111 on the bottom surface 100B, and the edge of the third through hole 910 is radially outwardly expanded compared to the edge of the second through hole 311, so that there is a sixth gap d6 between the edge of the third through hole 910 and the edge of the second through hole 311.

[0154] As shown in (b) of FIG. 13, if the reflective sheet 900 is offset, the actual size of the sixth gap d6 cannot be guaranteed to be the design size value, i.e., the reflective sheet 900 cannot be guaranteed to be in the target position. If the sixth gap d6 is too large, it will cause the reflected light of the reflective sheet 900 to decrease, resulting in a dark phenomenon at the position of the blind hole A.

[0155] To improve the above problems, in some exemplary embodiments of the present disclosure, as shown in FIG. 14, the bottom plate portion 310 is provided with a sunken area 312 adjacent to the second through hole 311, and the first reflection area S2 and the sunken area 312 are fixed by adhesive 500.

[0156] By using the above scheme, the bottom plate portion 310 is sunken around the second through hole 311, and the sunken area 312 and the first reflection area S2 are fixed by adhesive 500, which can prevent the reflective sheet 900 from being offset, reduce the influence of the offset of the reflective sheet 900 on the light efficiency, and at the same time, the sunken design of the bottom plate portion 310 can not increase the stacking thickness of the bottom plate portion 310 in the third direction Z.

[0157] It should be noted that the sinking design of the bottom plate portion 310 can be achieved by ribbing the bottom plate portion 310 so that the area of the bottom plate portion 310 surrounding the second through hole 311 sinks in the third direction Z.

[0158] For example, as shown in FIG. 15, the sinking height q1 of the sinking area 312 in the third direction Z can be 0.03±0.01 mm, the width p of the sinking area 312 in the radial direction of the second through hole 311 can be 0.55±0.15 mm, the thickness q2 of the adhesive 500 in the third direction Z can be 0.03±0.01 mm, the width m of the adhesive 500 in the radial direction of the third through hole 910 can be 0.2±0.1 mm, and considering the assembly tolerance, the edge of the adhesive 500 and the edge of the sinking area 312 are kept apart by a distance n, which can be 0.2±0.1 mm, so that the edge of the adhesive 500 can effectively avoid interfering with the sinking area 312. In addition, the first reflective area S2 is arranged circumferentially around the third through hole 910, and the width d9 of the first reflective area S2 in the radial direction of the third through hole 910 is 0.3-0.5 mm. The radial outward expansion width of the edge of the third through hole 910 relative to the edge of the second through hole 311 is the value of the sixth gap d6, which is 0.3-0.15 mm, so that the phenomenon of darkening in the area behind the hole can be effectively reduced, and the phenomenon of darkening in the area behind the hole caused by the offset of the reflective sheet 900 can be avoided. It should be understood that the above is only an example, and the specific values of the above dimensions are not limited thereto.

[0159] In addition, in some example embodiments, the bottom plate portion 310 has a first surface 314 facing the reflective sheet 900, and the difference between the sinking height of the sinking area 312 in the third direction Z and the thickness of the adhesive 500 is less than a fourth threshold value, so that the adhesive 500 and the first surface 314 are in the same plane, so that the risk of wrinkles or unevenness of the reflective sheet 900 can be reduced.

[0160] For example, the fourth threshold value can be a value equal to 0 or close to 0. Specifically, the fourth threshold value can include a variation range of less than or equal to 10% of 0, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to 3%, less than or equal to 2%, less than or equal to 1%, less than or equal to 0.5%, less than or equal to 0.1%, less than or equal to 0.05%, etc. It should be noted that the term "in the same plane" can mean that two surfaces are arranged in the same plane within a micron range, for example, within 40 μm, 30 μm, 20 μm, 10 μm, or 1 μm.

[0161] In the backlight module provided in the embodiment, the back plate 300 can be formed by a pressing rib process. As shown in FIG. 23, the pressing rib mold 70 in the pressing rib equipment is used to press the bottom plate part 310 to form the sunken area 312. The width of the sunken area 312 can be adjusted by the corresponding structure on the pressing rib mold 70.

[0162] In addition, in the backlight module provided in the embodiment, the reflective sheet 900 and the adhesive 500 can be integrally punched. First, as shown in (a) of FIG. 24, the raw material 500' of the adhesive 500 is bonded to the reflective sheet 900. Then, as shown in (b) of FIG. 24, the reflective sheet 900 and the raw material 500' of the adhesive 500 are punched and rejected together to obtain the reflective sheet 900 with the adhesive 500 bonded thereto.

[0163] In some exemplary embodiments, as shown in FIG. 15, in order to increase the structural stability of the module, the bottom plate part 310 of the back plate 300 is provided with a second through hole 311 at a position corresponding to the first through hole 111. The second through hole 311 at least partially overlaps the orthographic projection of the first through hole 111 on the bottom surface 100B. The bottom plate part 310 is provided with a support edge 313 folded toward the side on which the light guide plate 100 is located along a third direction Z perpendicular to the light exit surface 100A around the edge of the second through hole 311.

[0164] In the backlight module provided in the embodiments of the present disclosure, the hole peripheral light efficiency can be improved by improving the side wall of the notch part 211 and / or by anti-offset design of the reflective sheet 900, so as to improve the hole peripheral light efficiency of the product.

[0165] The backlight module in some embodiments of the present disclosure is taken as a physical test example, and the backlight module in the related art is taken as a control example. The hole peripheral 13-point luminance uniformity test (test of the lowest luminance / highest luminance of 13 points) and optical software simulation are performed. The distribution positions of the 13 test points relative to the blind hole A are shown by the numbers 1 to 13 in FIG. 16.

[0166] The test results are as follows: the luminance uniformity of the 13 points in the physical test example is 83%, the optical software simulation result is that the luminance uniformity of the 13 points is 82%, and the luminance uniformity of the 13 points in the control example is 83%. It can be seen that the luminance uniformity of the 13 points in the backlight module provided in the embodiments of the present disclosure is improved compared with the luminance uniformity of the backlight module in the related art.

[0167] In addition, the display device provided by the display panel 10 and the backlight module provided by the display device are provided.

[0168] In some exemplary embodiments, the display panel 10 includes a display area AA, the display area AA includes a first area AA1 and a second area AA2 surrounding the first area AA1, the first area AA1 at least partially coincides with the orthographic projection of the first through hole 111 on the light emitting surface 100A, and the first area AA1 can be the position corresponding to the blind hole A; the display panel 10 includes a first side corresponding to the first side edge 112, and the distance between the first side and the first area AA1 in the first direction Y is less than or equal to 1.88 mm. That is, in the display device provided by the display panel 10, the positioning size of the blind hole can be less than or equal to 1.88 mm, for example, the positioning size of the blind hole can be 1.48 mm.

[0169] Obviously, the display device provided by the display panel 10 also has the beneficial effects brought by the backlight module provided by the display panel 10, which will not be repeated here.

[0170] The following points need to be explained:

[0171] (1) The drawings of the display panel 10 only involve the structures related to the display panel 10, and other structures can be referred to the general design.

[0172] (2) For the sake of clarity, the thickness of the layer or area is magnified or reduced in the drawings used to describe the embodiments of the display panel 10, that is, these drawings are not drawn according to the actual proportion. It can be understood that when an element such as a layer, a film, an area or a substrate is referred to as being located “on” or “under” another element, the element can be “directly” located on or under another element or there can be an intermediate element.

[0173] (3) In the case of no conflict, the embodiments of the display panel 10 and the features in the embodiments can be combined with each other to obtain new embodiments.

[0174] The above is only a specific embodiment of the display panel 10, but the protection scope of the display panel 10 is not limited thereto, and the protection scope of the display panel 10 should be subject to the protection scope of the claims.

Claims

1. A backlight module, characterized in that, include: The light guide plate has a light-emitting surface and a bottom surface arranged opposite to each other; and A frame surrounds the light-emitting surface of the light guide plate; wherein, The light guide plate includes a main body and a protruding part. The main body is provided with a first through hole that penetrates the light-emitting surface and the bottom surface. The main body includes a first side and a second side that are opposite to each other along a first direction. In the first direction, the distance between the center point of the first through hole and the first side is smaller than the distance between the center point of the first through hole and the second side. The protruding portion is formed by the first side extending away from the first through hole in the first direction, and the first through hole and the orthographic projection of the protruding portion on the first projection plane at least partially overlap, the first projection plane being perpendicular to the light-emitting surface and the first direction; the frame includes a first side frame corresponding to the first side, the first side frame having a notch at the position corresponding to the protruding portion, and the protruding portion extending at least partially into the notch.

2. The backlight module according to claim 1, characterized in that, The notch extends through the first side frame along the first direction.

3. The backlight module according to claim 2, characterized in that, The backlight module also includes a back plate, which includes a side plate portion located around the periphery of the frame; In the first direction, the area of ​​the first side excluding the protruding portion has a first gap d1 with the frame, and the protruding portion has a second gap d2 with the side plate portion; the difference between d1 and d2 is less than or equal to a first threshold.

4. The backlight module according to claim 3, characterized in that, Along the second direction, the protruding portion has opposing first and second edges, and the recessed portion has opposing first and second sidewalls, the second direction intersecting the first direction; The first edge and the first sidewall are located on the same side of the protruding portion, and the second edge and the second sidewall are located on the same side of the protruding portion; wherein, There is a third gap d3 between the first edge and the first sidewall; A fourth gap d4 exists between the second edge and the second sidewall; The difference between any two of d1, d2, d3 and d4 is less than or equal to the second threshold.

5. The backlight module according to claim 1, characterized in that, The orthographic projection of the protruding portion on the first projection surface completely covers the orthographic projection of the first through hole on the first projection surface.

6. The backlight module according to claim 5, characterized in that, The protruding portion has a first width along the extension direction of the first side, and the first through hole has a second width along the extension direction of the first side; wherein the center point of the protruding portion in the extension direction of the first side and the center point of the first through hole coincide on the orthographic projection of the first projection plane, and the first width is greater than or equal to the second width.

7. The backlight module according to claim 1, characterized in that, Along the second direction, the notch has opposing first and second sidewalls, the second direction intersecting the first direction; both the first and second sidewalls are inclined or curved surfaces, and the inclined or curved surfaces are configured such that the opening size of the notch on the side closer to the light guide plate in the first direction is larger than the opening size on the side farther from the light guide plate.

8. The backlight module according to claim 7, characterized in that, Along the second direction, the protruding portion has opposing first and second edges, the first edge being located on the same side of the protruding portion as the first sidewall, the first edge being a slope or arc surface adapted to the shape of the first sidewall, and the second edge being located on the same side of the protruding portion as the second sidewall, the second edge being a slope or arc surface adapted to the shape of the second sidewall.

9. The backlight module according to claim 7, characterized in that, When the first sidewall and the second sidewall are inclined planes, the angle α between either the first sidewall and the second sidewall and the second direction is 135±10°.

10. The backlight module according to claim 1, characterized in that, The backlight module also includes: The backplate includes a bottom plate and side plates, wherein the bottom plate is located on one side of the bottom surface of the light guide plate, and the side plates are located around the periphery of the frame; and The light-blocking tape includes a main body and an extension; wherein, The frame includes a top and a bottom that are opposite each other along a third direction, with the top facing the light-emitting direction of the light guide plate and the third direction perpendicular to the light-emitting surface; The main body of the tape surrounds the periphery of the light guide plate and is attached to the top surface. The extension is located at the position corresponding to the protruding portion, extends from the main body of the tape, folds towards the side where the bottom plate portion is located, and is attached to the side plate portion.

11. The backlight module according to claim 10, characterized in that, The extension portion has a third width along the extension direction of the first side, and the notch portion has a fourth width along the extension direction of the first side, wherein the third width is greater than or equal to the fourth width.

12. The backlight module according to claim 1, characterized in that, The backlight module also includes: A backplate includes a side plate portion located around the periphery of the frame. The side plate portion has a top edge facing the light-emitting direction of the light guide plate. The top edge of the side plate portion has a folded edge extending in the first direction toward the light guide plate at a position corresponding to the recessed portion. The light-shielding tape includes a top surface facing the light-emitting direction of the light guide plate, the light-shielding tape surrounds the periphery of the light guide plate, and is attached to the top surface and the folded edge.

13. The backlight module according to claim 12, characterized in that, The side of the folded edge used to attach the light-shielding tape is in the same plane as the surface of the top.

14. The backlight module according to claim 12, characterized in that, The frame includes a first side frame corresponding to the first side, the first side frame having a sixth width along the first direction, and the folded edge having a seventh width along the first direction, wherein the difference between the sixth width and the seventh width is less than or equal to a third threshold.

15. The backlight module according to claim 1, characterized in that, The backlight module also includes: The backplate includes a bottom plate and side plates, wherein the bottom plate is located on one side of the bottom surface of the light guide plate, and the side plates are located around the periphery of the frame; and The side light-shielding layer has an outer surface portion, which is located on the side away from the first through hole along the first direction in the side plate portion. The side light-shielding layer is located at the position corresponding to the protruding portion and at least covers part of the outer surface of the side plate portion.

16. The backlight module according to claim 15, characterized in that, The thickness of the side shading layer in the direction perpendicular to the outer surface is less than or equal to 0.2 mm.

17. The backlight module according to claim 15, characterized in that, The side plate portion has a bottom edge connected to the bottom plate portion, wherein in a third direction perpendicular to the light-emitting surface, the distance between the side light-shielding layer and the bottom edge is greater than or equal to 0.

18. The backlight module according to claim 17, characterized in that, In a third direction perpendicular to the light-emitting surface, the width of the side light-shielding layer covering the side plate portion is greater than or equal to 0.2 mm.

19. The backlight module according to claim 1, characterized in that, The backlight module also includes: The back plate includes a bottom plate portion located on one side of the bottom surface of the light guide plate. The bottom plate portion is provided with a second through hole. The second through hole and the first through hole at least partially overlap in their orthographic projections on the bottom surface. The area of ​​the bottom plate portion adjacent to the second through hole is provided with a recessed area. A reflective sheet is located between the base plate and the light guide plate. The reflective sheet has a third through hole. The orthographic projection area of ​​the third through hole on the bottom surface is smaller than the orthographic projection area of ​​the first through hole on the bottom surface, so that at least a portion of the reflective sheet adjacent to the third through hole is not covered by the light guide plate, thereby forming a first reflective area. The first reflective area and the recessed area are bonded and fixed together by adhesive.

20. The backlight module according to claim 19, characterized in that, The sinking height of the sinking area along the third direction is 0.03±0.01mm; the width of the sinking area along the second through hole in the radial direction is 0.55±0.15mm; the thickness of the adhesive along the third direction is 0.03±0.01mm; the width of the adhesive along the third through hole in the radial direction is 0.2±0.1mm; the distance between the edge of the adhesive and the edge of the sinking area is 0.2±0.1mm; the width of the first reflective area along the third through hole in the radial direction is 0.3~0.5mm; the radial outward expansion width of the edge of the third through hole compared to the edge of the second through hole is 0.3mm~0.15mm.

21. The backlight module according to claim 19, characterized in that, The base plate portion has a first surface facing the reflector, and the difference between the sinking height of the sinking area relative to the first surface in a third direction and the thickness of the adhesive is less than or equal to a fourth threshold.

22. A display device, characterized in that, include: Display panel; and The backlight module as described in any one of claims 1 to 21.

23. The display device according to claim 22, characterized in that, The display panel includes a display area, which includes a first region and a second region surrounding the first region. The first region and the orthographic projection of the first through hole on the light-emitting surface at least partially overlap. The display panel also includes a first side corresponding to the first side, wherein in the first direction, the distance between the first side and the first region is less than or equal to 1.88 mm.

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