Backlight module and display device

Abstract

The utility model provides a backlight module and a display device, and the backlight module comprises a light guide plate and a rubber frame which surrounds the periphery of a light emitting surface of the light guide plate; the light guide plate comprises a main body part and a protruding part, a first through hole is formed in the main body part, and the main body part comprises a first side edge and a second side edge which are opposite in the first direction; the protruding part is formed by extending the first side edge in the direction away from the first through hole in the first direction, orthographic projections of the first through hole and the protruding part on a first projection plane are at least partially overlapped, and the first projection plane is perpendicular to the light emitting surface and the first direction; the rubber frame comprises a first side frame corresponding to the first side edge, a notch part is arranged at the position, corresponding to the protruding part, of the first side frame, and at least part of the protruding part extends into the notch part. According to the backlight module and the display device, the product quality can be improved.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a backlight module and a display device. Background Art

[0002] With the development of science and technology, for full-screen, ultra-high screen-to-body ratio is the key technical direction of display device development. In related technologies, in order to achieve full-screen display, display devices such as mobile phones set devices such as cameras and receivers in specific areas of the display panel, and dig blind holes in the corresponding areas when designing the backlight module. The design of blind holes has a crucial impact on full-screen. Utility Model Content

[0003] The embodiments of the present disclosure provide a backlight module and a display device, which can improve product quality.

[0004] The technical solutions provided by the embodiments of the present disclosure are as follows:

[0005] In a first aspect, an embodiment of the present disclosure provides a backlight module, comprising:

[0006] A light guide plate having a light emitting surface and a bottom surface disposed opposite to each other; and

[0007] A plastic frame surrounds the outer periphery of the light emitting surface of the light guide plate; wherein,

[0008] The light guide plate comprises a main body portion and a protruding portion, the main body portion is provided with a first through hole penetrating the light emitting surface and the bottom surface, the main body portion comprises a first side edge and a second side edge opposite to each other along 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 a center point of the first through hole and the second side edge;

[0009] The protruding portion is formed by the first side edge extending in the first direction in a direction away from the first through hole, and the first through hole at least partially overlaps with the orthographic projection of the protruding portion on a first projection plane, and the first projection plane is perpendicular to the light emitting surface and the first direction; the rubber frame includes a first side frame corresponding to the first side edge, and the first side frame is provided with a notch portion at a position corresponding to the protruding portion, and the protruding portion at least partially extends into the notch portion.

[0010] Exemplarily, the notch portion penetrates the first side frame along the first direction.

[0011] Exemplarily, the backlight module further includes a back plate, the back plate includes a side plate portion, and the side plate portion is located at the periphery of the plastic frame;

[0012] Among them, in the first direction, there is a first gap d1 between the area of ​​the first side except the protruding part and the rubber frame, and there is a second gap d2 between the protruding part and the side panel part; the difference between d1 and d2 is less than or equal to the first threshold.

[0013] Exemplarily, along the second direction, the protruding portion has a first edge and a second edge opposite to each other, the recessed portion has a first side wall and a second side wall opposite to each other, the second direction intersects with the first direction; the first edge and the first side wall are located on the same side of the protruding portion, and the second edge and the second side wall are located on the same side of the protruding portion; wherein,

[0014] There is a third gap d3 between the first edge and the first side wall;

[0015] A fourth gap d4 is defined between the second edge and the second side wall;

[0016] A difference between any two of d1, d2, d3 and d4 is less than or equal to the second threshold.

[0017] 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.

[0018] Exemplarily, the protruding portion has a first width along the extension direction of the first side edge, and the first through hole has a second width along the extension direction of the first side edge; wherein the center point of the protruding portion in the extension direction of the first side edge and the center point of the first through hole have coincident direct projections on the first projection plane, and the first width is greater than or equal to the second width.

[0019] Exemplarily, along a second direction, the recess portion has a first side wall and a second side wall relative to each other, and the second direction intersects with the first direction; the first side wall and the second side wall are both inclined surfaces or curved surfaces, and the inclined surfaces or curved surfaces are configured so that the opening size of the recess portion in the first direction close to the light guide plate is larger than the opening size away from the light guide plate.

[0020] Exemplarily, along the second direction, the protruding portion has a first edge and a second edge relative to each other, the first edge and the first side wall are located on the same side of the protruding portion, the first edge is a slope or a curved surface adapted to the shape of the first side wall, and the second edge and the second side wall are located on the same side of the protruding portion, the second edge is a slope or a curved surface adapted to the shape of the second side wall.

[0021] Exemplarily, when the first side wall and the second side wall are inclined surfaces, the value range of the angle α of either the first side wall or the second side wall relative to the second direction is 135±10°.

[0022] Exemplarily, the backlight module further includes:

[0023] A back plate, comprising a bottom plate portion and a side plate portion, wherein the bottom plate portion is located on one side of the bottom surface of the light guide plate, and the side plate portion is located on the periphery of the plastic frame; and

[0024] The light-shielding tape comprises a tape main body and an extension portion; wherein:

[0025] The plastic frame comprises a top and a bottom which are opposite to each other along a third direction, and the top faces the light emitting direction of the light guide plate, and the third direction is perpendicular to the light emitting surface;

[0026] The tape body surrounds the periphery of the light guide plate and is attached to the surface of the top. The extension portion is arranged at a position corresponding to the protruding portion, extends from the tape body, folds toward the side where the bottom plate portion is located, and is attached to the side plate portion.

[0027] Exemplarily, the extension portion has a third width along the extension direction of the first side edge, 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.

[0028] Exemplarily, the backlight module further includes:

[0029] A back plate, comprising a side plate portion, the side plate portion is located at the periphery of the plastic frame, the side plate portion has a top edge facing the light emitting direction of the light guide plate, and the top edge of the side plate portion is provided with a folded edge extending along the first direction toward the direction close to the light guide plate at a position corresponding to the notch portion; and

[0030] The light-shielding tape, the tape frame 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.

[0031] Exemplarily, a side of the folded edge for attaching the light-shielding tape is in the same plane as the surface of the top.

[0032] Exemplarily, the rubber frame includes a first side frame corresponding to the first side edge, the first side frame has a sixth width along the first direction, and the folded 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.

[0033] Exemplarily, the backlight module further includes:

[0034] A back plate, comprising a bottom plate portion and a side plate portion, wherein the bottom plate portion is located on one side of the bottom surface of the light guide plate, and the side plate portion is located on the periphery of the plastic frame; and

[0035] A side light shielding layer, wherein a surface of the side plate portion located away from the first through hole along the first direction is an outer side surface;

[0036] Wherein, the side shading layer is located at a position corresponding to the protruding portion and at least covers a portion of the outer side surface of the side plate portion.

[0037] Exemplarily, the film thickness of the side light-shielding layer in a direction perpendicular to the outer side surface is less than or equal to 0.2 mm.

[0038] Exemplarily, 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, a spacing between the side light shielding layer and the bottom edge is greater than or equal to 0.

[0039] 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.

[0040] Exemplarily, the backlight module further includes:

[0041] A back plate, comprising a bottom plate portion located on one side of the bottom surface of the light guide plate, wherein a second through hole is provided on the bottom plate portion, wherein the second through hole at least partially overlaps with an orthographic projection of the first through hole on the bottom surface, and a sinking area is provided in an area of ​​the bottom plate portion adjacent to the second through hole;

[0042] A reflective sheet is located between the bottom plate portion and the light guide plate, and a third through hole is provided on the reflective sheet. 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 area of ​​the reflective sheet adjacent to the third through hole is not covered by the light guide plate to form a first reflective area, and the first reflective area is fixed to the sinking area by adhesive.

[0043] Exemplarily, the sinking height of the sinking area along the third direction is 0.03±0.01mm; the radial width of the sinking area along the second through hole is 0.55±0.15mm; the thickness of the adhesive along the third direction is 0.03±0.01mm; the radial width of the adhesive along the third through hole is 0.2±0.1mm; the spacing between the edge of the adhesive and the edge of the sinking area is 0.2±0.1mm; the radial width of the first reflection area along the third through hole is 0.3~0.5mm; the radial outward width of the edge of the third through hole compared to the edge of the second through hole is 0.3mm~0.15mm.

[0044] Exemplarily, the bottom plate portion has a first surface facing the reflective sheet, and a difference between a sinking height of the sinking area relative to the first surface along a third direction and a thickness of the adhesive is less than or equal to a fourth threshold.

[0045] In a second aspect, an embodiment of the present disclosure further provides a display device, comprising:

[0046] display panel; and

[0047] The backlight module as described above.

[0048] Exemplarily, the display panel includes a display area, the display area includes a first area and a second area surrounding the first area, the first area at least partially overlaps with the orthographic projection of the first through hole on the light-emitting surface, and the display panel includes a first side corresponding to the first side edge, wherein in the first direction, the spacing between the first side and the first area is less than or equal to 1.88 mm.

[0049] The beneficial effects brought by the embodiments of the present disclosure are as follows:

[0050] In the above scheme, a protruding portion is partially extended outward on the first side edge close to the first through hole in the main part of the light guide plate along the first direction, and a notch is provided on the rubber frame at a position corresponding to the protruding portion to avoid the protruding portion. In this way, part of the space at the position of the blind hole on the rubber frame is avoided to the light guide plate, and the distance from the first through hole to the edge of the light guide plate in the first direction is increased, thereby increasing the structural strength of the local area near the first through hole on the light guide plate, reducing the risk of breakage of the light guide plate in the local area near the blind hole, and improving the quality of the display product. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A front view of a backlight module provided in some embodiments of the present disclosure is shown;

[0052] Figure 2 express Figure 1 One of the enlarged views of the local structure at the position of the middle dotted frame B;

[0053] Figure 3 express Figure 1 The second enlarged view of the local structure at the position of the middle dotted frame B;

[0054] Figure 4 express Figure 1 The third enlarged view of the local structure at the position of the middle dotted frame B;

[0055] Figure 5 express Figure 4 Schematic diagram of the cross-sectional structure at position a;

[0056] Figure 6 express Figure 4 Schematic diagram of the cross-sectional structure at position b in the middle;

[0057] Figure 7 express Figure 1 The fourth enlarged view of the local structure at the position of the middle dotted frame B;

[0058] Figure 8 express Figure 7 Schematic diagram of the cross-sectional structure at position a;

[0059] Fig. 9 express Figure 7 Schematic diagram of the cross-sectional structure at position b in the middle;

[0060] Fig.10 express Figure 1 The fifth enlarged view of the local structure at the position of the middle dotted frame B;

[0061] Fig.11 express Fig.10 Schematic diagram of the cross-sectional structure at position b in the middle;

[0062] Fig.12 express Figure 1 Schematic diagram of the local structure light path at the position of the dotted box B;

[0063] Fig.13 Schematic diagram showing the light effect when the reflector in the backlight module is offset, wherein (a) shows the light effect when the reflector is at the target position, and (b) shows the light effect when the reflector is offset;

[0064] Fig.14 A schematic diagram showing a cross-sectional structure of a backlight module in some embodiments of the present disclosure;

[0065] Fig.15 express Fig.14 A magnified view of the local structure at the position of the middle dotted box C;

[0066] Fig.16 A schematic diagram showing the distribution of light efficiency test points;

[0067] Fig.17 One of the partial structural diagrams of the injection mold showing the rubber frame;

[0068] Fig.18 The second schematic diagram showing the local structure of the injection mold of the rubber frame;

[0069] Fig.19 Schematic diagrams showing the structures of a light-shielding tape and a protective film, wherein (a) shows a schematic diagram of the light-shielding tape, (b) shows a schematic diagram of the protective film, and (c) shows a schematic diagram of the light-shielding tape and the protective film combined together;

[0070] Fig. 20 A schematic diagram showing the process of shading tape hemming;

[0071] Fig.21 A schematic diagram showing the stamping process of hemming;

[0072] Fig. 22 A schematic diagram showing the process of oblique insertion of a light guide plate;

[0073] Fig.23 Schematic diagram showing the formation of a sinking area by rib treatment;

[0074] Fig.24 Schematic diagram showing the punching process of the reflective sheet and the adhesive. DETAILED DESCRIPTION

[0075] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0076] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one", "one" or "the" do not indicate quantity restrictions, but indicate that there is at least one. Similar words such as "include" or "comprise" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Similar words such as "connect" or "connected" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0077] Before describing in detail the backlight module and the display device provided by the embodiments of the present disclosure, the following description is given of the related technologies:

[0078] With the development of science and technology, for full-screen displays, ultra-high screen-to-body ratio is the key technical direction for the development of display devices. In related technologies, in order to achieve full-screen display, display devices such as mobile phones place devices such as cameras and receivers in specific areas of the display panel, and dig blind holes in the corresponding specific areas when designing the backlight module.

[0079] In order to realize the blind hole design, it is necessary to dig holes on the backlight module, for example, dig holes on components such as the light guide plate, back plate and optical film material of the backlight module.

[0080] The design of blind holes has a crucial impact on full screens. There are two important parameters in blind hole design: blind hole dimensions and blind hole positioning dimensions. The blind hole positioning dimensions refer to the distance between the edge of the display panel closest to the blind hole and the blind hole.

[0081] The area between the edge of the display panel closest to the blind hole and the blind hole is small, and complex images cannot be displayed, resulting in a waste of resources. Therefore, compressing the blind hole positioning size can greatly increase the screen-to-body ratio and bring a better visual experience. However, if the blind hole positioning size is to be further compressed to increase the screen-to-body ratio, there will be the following problems: the light guide plate will shrink due to temperature during application, causing the side of the light guide plate close to the blind hole to interfere with the plastic frame. If the local area of ​​the light guide plate near the blind hole is not strong enough, cracks will occur.

[0082] The strength of the local area of ​​the light guide plate near the blind hole can be determined by the hole pull-out force. The general specification of the light guide plate hole pull-out force is ≥50N. Through crack (split) verification on the actual object, the verification results show that if the blind hole positioning size is directly reduced, there is a risk that the hole pull-out force in the local area of ​​the light guide plate near the blind hole will not meet the specifications.

[0083] In order to solve the above problems, the embodiments of the present disclosure provide a backlight module and a display device, which can improve the screen-to-body ratio and avoid the problem of insufficient strength of the local area of ​​the light guide plate near the blind hole, thereby improving product quality.

[0084] like Figure 1 and Figure 6 As shown, the backlight module provided in the embodiment of the present disclosure includes a light guide plate 100 and a plastic frame 200, wherein the light guide plate 100 has a light emitting surface 100A and a bottom surface 100B which are arranged opposite to each other; the plastic frame 200 surrounds the four sides of the light emitting surface 100A of the light guide plate 100, that is, the plastic frame 200 is arranged around the periphery of the light guide plate 100;

[0085] The light guide plate 100 includes a main body 110 and a protruding part 120. The main body 110 is provided with a first through hole 111 penetrating the light emitting surface 100A and the bottom surface 100B. The first through hole 111 is a blind hole A corresponding to the hole on the light guide plate 100.

[0086] The main body 110 includes a first side edge 112 and a second side edge 113 that are opposite to each other along a first direction Y, wherein the first direction Y is a direction parallel to the light emitting surface 100A;

[0087] In the first direction Y, the distance between the center point O of the first through hole 111 and the first side 112 is smaller than the distance between the center point O of the first through hole 111 and the second side 113, that is, the first side 112 is closer to the first through hole 111 than the second side 113;

[0088] The protruding portion 120 is formed by the first side 112 extending in the first direction Y in a direction away from the first through hole 111, and the protruding portion 120 corresponds to the position of the first through hole 111, and the first through hole 111 and the orthographic projection of the protruding portion 120 on the first projection plane W at least partially overlap, and the first projection plane W is perpendicular to the light emitting surface 100A and the first direction Y;

[0089] The plastic frame 200 includes a first side frame 210 corresponding to the first side edge 112 . The first side frame 210 is provided with a notch 211 at a position corresponding to the protruding portion 120 , and the protruding portion 120 at least partially extends into the notch 211 .

[0090] In the above scheme, the protruding portion 120 is formed by partially extending outward on the first side 112 closest to the first through hole 111 in the main body 110 along the first direction Y, and the notch 211 is provided on the plastic frame 200 to avoid the protruding portion 120. In this way, part of the space on the plastic frame 200 corresponding to the position of the blind hole A is avoided to the light guide plate 100, so as to increase 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 the light guide plate 100 breaking in the local area near the blind hole A, and improving the quality of the display product.

[0091] When the backlight module is applied to a display device, the position design of the first through hole 111 (ie, blind hole A) can be more flexible due to the presence of the protruding portion 120. The blind hole positioning size can remain unchanged or be further reduced compared to the related art.

[0092] For example, in the related art, the blind hole positioning size can be 1.88 mm. By using the backlight module provided by the embodiment of the present disclosure, the blind hole positioning size can be further compressed to a size less than 1.88 mm. For example, considering factors such as the size of the avoidance space of the plastic frame 200, the blind hole positioning size can be compressed to about 1.48 mm.

[0093] It should be noted that, unless otherwise specified, the values ​​in this application are not absolute definitions, but express a range of variation within a certain range of the reference value. For example, each value may 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.

[0094] Exemplarily, the second side 113 may be located at the light incident side 100C of the light guide plate 100, and the first side 112 may be located at the opposite side 100D of the light incident side 100C. In other words, the first through hole 111 may be arranged close to the opposite side 100D along the first direction Y. However, in practical applications, the first side 112 may be other side of the light guide plate 100, and is not limited thereto.

[0095] In addition, if the blind hole positioning size is desired to be compressed as much as possible, the extension length of the protruding portion along the first direction Y may be increased as much as possible. Figures 1 to 6 As shown, the notch 211 penetrates the first side frame 210 along the first direction Y. In this way, the spatial dimensions of the first side frame 210 along the first direction Y are all used 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.

[0096] In some exemplary embodiments, the dimension of the first side frame 210 along the first direction Y is 0.4 mm, and the extension length of the protruding portion 120 relative to the first side edge 112 along the first direction Y can be 0.4 mm. It should be noted that, unless otherwise specified, the values ​​in this application are not absolute definitions, but express a range of variation within a certain range of the reference value. For example, each 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.

[0097] It should also be noted that the above is only an example, and in other embodiments not shown, the notch portion 211 may not penetrate the first side frame 210 along the first direction Y.

[0098] In some exemplary embodiments, Figure 5 and Figure 6 As shown, the backlight module may further include a back plate 300, the back plate 300 includes a bottom plate portion 310 and a side plate portion 320, the bottom plate portion 310 is located on one side of the bottom surface 100B, and the side plate portion 320 is located on the periphery of the plastic frame 200. The back plate 300 may be made of a hard material such as metal, and plays a role in supporting and fixing the plastic frame 200 and the light guide plate 100 and other module components.

[0099] For example, Figure 2 As shown, in the first direction Y, a first gap d1 is provided between the area of ​​the first side edge 112 except the protruding portion 120 and the rubber frame 200, that is, a first gap d1 is provided between the main body portion 110 and the rubber frame 200, and a second gap d2 is provided between the protruding portion 120 and the side panel portion 320; wherein the difference between d1 and d2 is less than or equal to a first threshold value.

[0100] In the above scheme, since the protruding portion 120 is provided on the light guide plate 100, the gap between the protruding portion 120 and the side panel portion 320 in the first direction Y may be greater than or equal to the gap between the portion where the protruding portion 120 is not provided and the rubber frame 200 in the first direction Y. In this way, it can be ensured that during the assembly process of the backlight module, the protruding portion 120 is prevented from contacting the side panel portion 320 first, thereby affecting the structural strength of the protruding portion 120.

[0101] In some exemplary embodiments, the first threshold may be a value equal to 0 or close to 0. For example, the first threshold may 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.

[0102] In the above scheme, the first gap d1 between the main body 110 and the rubber frame 200, and the second gap d2 between the protruding portion 120 and the side panel portion 320 are substantially the same, so that the protruding portion 120 does not contact the back panel 300 first during assembly, and at the same time, the amount of light passing through the first gap d1 and the second gap d2 at the first side edge 112 is more uniform.

[0103] Furthermore, in some exemplary embodiments, Figure 2 and Figure 3 As shown, along the second direction X, the protruding portion 120 has a first edge 121 and a second edge 122 opposite to each other, and the recessed portion 211 has a first side wall 2111 and a second side wall 2112 opposite to each other, and the second direction X intersects with the first direction Y, and the second direction X is parallel to the light emitting surface 100A. Exemplarily, the second direction X is the extending direction of the first side edge 110, which may be perpendicular to the second direction X.

[0104] Among them, the first edge 121 and the first side wall 2111 are located on the same side of the protruding portion 120, the second edge and the second side wall are located on the same side of the protruding portion 120, and there is a third gap d3 between the first edge 121 and the first side wall 2111, and there is a fourth gap d4 between the second edge 122 and the second side wall 2112; wherein the difference between any two of d1, d2, d3 and d4 is less than or equal to the second threshold.

[0105] By adopting the above solution, the gap between the first side edge 112 of the light guide plate 100 and the plastic frame 200, the gap between the protruding portion 120 and the plastic frame 200, and the gap between the protruding portion 120 and the side plate portion 320 are designed so that the difference between any two of them is within the second threshold value, which can further ensure the uniformity of the light amount at the first side edge 112. However, it should be understood that the present application is not limited thereto.

[0106] Exemplarily, the second threshold value can be a value equal to 0 or close to 0. Exemplarily, d1, d2, d3 and d4 can be 0.35 mm. The various values ​​in this application are not absolute definitions, but express the range of variation within a certain range of the benchmark value. For example, the range of variation of each value is less than or equal to 10%, 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.

[0107] In addition, in some exemplary embodiments of the present disclosure, Figure 1 As shown, 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. In this way, it can be further ensured that there is no weak area near the first through hole 111.

[0108] In some exemplary embodiments of the present disclosure, Figure 1 and Figure 2 As shown, the protruding portion 120 has a first width L1 along the extension direction of the first side 112, and the first through hole 111 has a second width L2 along the extension direction of the first side 112; wherein the center point O' of the protruding portion 120 in the extension direction of the first side 112 and the center point O of the first through hole 111 are coincident in their orthographic projections on the first projection plane W, and the first width L1 is greater than or equal to the second width L2.

[0109] By adopting 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 is aligned with the center point O of the first through hole 111 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, thereby further ensuring that the structural strength of the blind hole surrounding area on the side of the first through hole 111 away from the second side edge 113 is roughly uniform.

[0110] It should be noted that the shape of the orthographic projection of the protruding portion 120 on the plane where the light emitting surface 100A is located may include but is not limited to a rectangle, a sector or a trapezoid.

[0111] For example, Figure 2 As shown, along the second direction X, the notch portion 211 has a first side wall 2111 and a second side wall 2112 opposite to each other, the second direction X intersects with the first direction Y, and the second direction X is parallel to the light exit surface 100A. The first side wall 2111 and the second side wall 2112 are configured as inclined surfaces or curved surfaces, and the inclined surfaces 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 larger than the opening size on the side away from the light guide plate 100.

[0112] Since part of the light at the position of blind hole A is blocked by the structure at the position of blind hole A, the light on the side of blind hole A away from the light source is sparse and the brightness is low, resulting in a dark area around the side of blind hole A away from the light source. The side of the first through hole 111 away from the light source along the first direction Y is regarded as the rear-hole area. In the above scheme, the first side wall 2111 and the second side wall 2112 are constructed as inclined surfaces or curved surfaces, and the inclined surfaces or curved surfaces are configured so that the opening size of the recessed portion 211 on the side close to the light guide plate 100 in the first direction Y is larger 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 face the blind hole A. In this way, Fig.12 As shown, the light emitted from 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. In particular, at least part of the light is reflected back to the side of the blind hole A away from the light incident side 100C of the light guide plate 100 (i.e., the area behind the hole), thereby compensating for the dark defect of this area.

[0113] In some exemplary embodiments, the plastic frame 200 may be a white plastic frame, and the first side wall 2111 and the second side wall 2112 have better light reflectivity. However, the present invention is not limited thereto.

[0114] In some exemplary embodiments, Figure 2 As shown, the first edge 121 is a slope or a curved surface that matches the shape of the first side wall 2111; the second edge 122 and the second side wall 2112 are located on the same side of the protruding portion 120, and the second edge 122 is a slope or a curved surface that matches the shape of the second side wall 2112. In this way, the shapes of the protruding portion and the recessed portion 211 can be further matched to ensure uniform light at the gap between the light guide plate 100 and the plastic frame 200.

[0115] In addition, if Figure 3 As shown, when the first side wall 2111 and the second side wall 2112 are inclined surfaces, the protruding portion 120 is trapezoidal, and the angle α of any one 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, this is not limited to this, and in practical applications, the angle α can be selected in combination with the size of the notch 211, etc.

[0116] In some exemplary embodiments, Figure 2 As shown, the protruding portion 120 also includes a third edge 123, and the third edge 123 is a side edge of the protruding portion 120 located away from the first through hole 111 along the first direction Y, and the width of the third edge 123 along the extension direction of the first side 112 is greater than or equal to the width of the first through hole 111 along the extension direction of the first side 112 (i.e., the second width L2).

[0117] See also Figure 2 As shown, the bottom plate portion 310 is provided with a second through hole 311, and the second through hole 311 and the first through hole 111 are at least partially overlapped in their orthographic projection 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 centers of the first through hole 111 and the second through hole 311 coincide, and the difference in inner diameter between the first through hole 111 and the second through hole 311 is 0.5 mm, that is, the distance between the edge of the first through hole 111 and the second through hole 311 is 0.25 mm. It should be noted that the values ​​in this application are not absolute definitions, but express the range of variation within a certain range of the reference value. For example, the range of variation of each value is less than or equal to 10%, 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.

[0118] In the embodiment of the present disclosure, the notch portion 211 is provided on the rubber frame 200 . The molding process of the notch portion 211 is simple and can be achieved by adjusting the injection mold of the rubber frame in the related art.

[0119] Specifically, Fig.17As shown, a corresponding concave cavity 21 is designed at the position of the convex portion 120 in the injection mold 20 of the plastic frame. It should be noted that in order to ensure the quality of injection molding, there should be no glue hole 22 in the concave cavity 21, otherwise it will cause sealing problems, and then water vapor will penetrate into the mold cavity, thereby affecting the quality of the plastic frame 200. In order to avoid the above-mentioned sealing problems, as Fig.18 As shown, glue holes 22 can be set on both sides of the concave cavity 21, and the closest distance D between the glue holes 22 and the concave cavity is 2 mm. Unless otherwise specified, the values ​​in this application are not absolute definitions, but express the range of variation within a certain range of the reference value. For example, the range of variation of each value is less than or equal to 10%, 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 addition, in some exemplary embodiments of the present disclosure, Figure 4 As shown, the backlight module further includes a light shielding tape 400, which is used to be attached between the plastic frame 200 and the display panel to prevent light leakage from the surrounding sides of the light guide plate 100. However, due to the design of the notch 211, the plastic frame 200 is missing at a local position corresponding to the notch 211, which may result in the light shielding tape 400 being unable to be attached and fixed to the notch 211.

[0121] In order to improve the above problems, in some exemplary embodiments of the present disclosure, Figures 1 to 6 As shown, the backlight module also includes a light-shielding tape 400, and the light-shielding tape 400 includes a tape main body 410 and an extension part 420; wherein, the tape frame 200 includes a top 200A and a bottom 200B that are opposite to each other along the third direction Z, and the top 200A faces 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 body 410 surrounds the periphery of the light guide plate 100 and is attached to the surface of the top 200A; the extension part 420 is arranged at a position corresponding to the protruding part 120, and extends from the tape main body 410 and is folded toward the side where the bottom plate part 310 is located and attached to the side plate part 320, so as to wrap the side plate part 320.

[0122] By adopting the above scheme, the shading tape 400 is partially extended at the position corresponding to the notch 211 to form the extension portion 420, and the extension portion 420 is wrapped and folded back to be attached to the outer surface of the side panel portion 320 of the back panel 300, which can effectively prevent light leakage.

[0123] In some exemplary embodiments, Figure 4 As shown, the extension portion 420 has a third width L3 along the extension direction of the first side edge 112 , the notch portion 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 .

[0124] In this way, it can be ensured that the extending portion 420 can completely cover the notch portion 211 to further ensure the light leakage prevention effect.

[0125] It should be noted that the fourth width L4 is the maximum opening dimension of the notch portion 211 along the second direction X.

[0126] like Figure 6 As shown, the extension portion 420 extends from the tape main body 410 and is folded back and attached to the side panel portion 320. The overlapping dimension Q of the extension portion 420 with the side panel portion 320 along its extension direction needs to be large enough to ensure adhesion.

[0127] Exemplarily, Q is greater than or equal to 0.7 mm, but is not limited thereto.

[0128] In the embodiment of the present disclosure, the light shielding tape 400 is provided with the extension part 420, and the molding process of the extension part 420 is simple. When the light shielding tape 400 is manufactured, it can be obtained by cutting the raw material with a die cutter, and when forming the extension part 420, the die cutter in the related art can be adjusted accordingly.

[0129] Specifically, Fig.19 As shown, the shading tape 400 is covered with a protective film 40 during die-cutting. Considering that the extension portion 420 needs to be folded and wrapped after die-cutting, the protective film 40 can avoid the extension portion 420 and does not protrude, that is, the protective film 40 does not cover the extension portion 420.

[0130] The light shielding tape 400 can be edged by using an adhesive tape edge wrapping process. Fig. 20 As shown, the edge wrapping can be completed by punching the extension 420 on the light shielding tape 400 through the pressure head 50 on the edge wrapping equipment. It should be noted that the light shielding tape 400 is sticky and easy to bond with the pressure head. The above bonding problem can be solved by wrapping a layer of silicone oil release paper on the surface of the pressure head 50.

[0131] In other exemplary embodiments, Figures 7 to 9As shown, the side panel portion 320 has a top edge 321 and a bottom edge 322 opposite to each other along a third direction Z, the bottom edge 322 is connected to the bottom plate portion 310, and the top edge 321 is provided with a folded edge 323 extending along the first direction Y toward the direction close to the light guide plate 100 at a position corresponding to the recessed portion 211; the rubber frame 200 includes a top 200A surface facing the light emitting direction of the light guide plate 100, and the shading tape 400 surrounds the periphery of the light guide plate 100 and is attached to the top 200A surface and the folded edge 323.

[0132] By adopting the above solution, the side panel part 320 is folded inward at the position corresponding to the notch 211 to make up for the missing plastic frame 200 of the notch 211, providing an attachment surface for the light-shielding tape 400, which can effectively prevent light leakage.

[0133] In some exemplary embodiments, the side of the folded edge 323 for attaching the light shielding tape 400 is in the same plane as the top 200A surface 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" may mean that two surfaces are arranged along the same plane within a micrometer range, for example, within 40μm, 30μm, 20μm, 10μm or 1μm.

[0134] like Figure 7 and Fig. 9 As shown, in some exemplary 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 to further ensure the anti-light leakage effect.

[0135] In some exemplary embodiments, Figure 7 As shown, 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, wherein the difference between the sixth width L6 and the seventh width L7 is less than or equal to a third threshold.

[0136] Exemplarily, the third threshold value may be a value equal to 0 or close to 0. Specifically, the third threshold value may 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 shading effect of the shading tape 400 at the folded edge 323 and the shading effect at the first side frame 210 are substantially the same.

[0137] In the embodiment of the present disclosure, when manufacturing the back plate 300, the folded edge 323 can be formed by two stamping processes. Fig.21 As shown in the figure, the stamping process is carried out from (a) to (d) in sequence. First, see Fig.21 As shown in (a) and (b), the first stamping die 61 can be used to stamp the back plate 300 prototype material for the first time, so that the side plate portion 320 is bent relative to the bottom plate portion 310; then, see Fig.21 As shown in (c) and (d), a second stamping die 62 is used to perform a second stamping on a local portion of the side plate portion 320 to obtain the folded edge 323.

[0138] It should be noted that, since the folded edge 323 is formed at a local position of the side plate portion 320, Fig. 22 As shown, when the light guide plate 100 and the back plate 300 are assembled, the light guide plate 100 can be inserted obliquely. Fig. 22 As shown in (a) and (b), the side of the light guide plate 100 provided with the protruding portion is first obliquely inserted into the space enclosed by the folded edge 323 and the bottom plate; after being obliquely inserted to the target position, see Fig. 22 As shown in (c), the light guide plate 100 is placed flat.

[0139] In addition, in some other exemplary embodiments, Fig.10 and Fig.11 As shown, the backlight module also includes:

[0140] The optical film material 700 is located on the light emitting surface 100A side of the light guide plate 100;

[0141] The side shading layer 800 , the surface of the side plate portion 320 along the first direction Y located away from the first through hole 111 is the outer side surface S1 , the side shading layer 800 is located at a position corresponding to the protruding portion 120 , and at least covers a portion of the outer side surface S1 .

[0142] By adopting the above solution, the side shading layer 800 can be formed by coating the shading material on the side of the backlight module (ie, the outer side S1 ), that is, by applying glue on the side at the position corresponding to the notch 211 , light leakage can be effectively blocked.

[0143] It should be noted that when the backlight module disclosed in the present invention is applied to a display device, an optical adhesive layer 11 and a polarizer 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-emitting side of the display panel 10. The side shading layer 800 extends along the third direction Z from the outer side surface S1 toward the display panel 10 and covers the optical adhesive layer 11, the polarizer 12, the display panel 10, etc., until it extends to the side of the protective cover plate close to the display panel 10 to ensure effective blocking of light leakage.

[0144] If the thickness of the side light shielding layer 800 is too thick and the height protruding from the outer side surface S1 is too high, it may interfere with the whole machine housing, etc. If the thickness is too small, it will affect the light shielding effect. Therefore, illustratively, the film thickness h3 of the side light shielding layer 800 in the direction perpendicular to the outer side surface S1 is less than or equal to 0.2 mm. In other words, the thickness h3 of the side glue coating 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 housing, etc. However, it is not limited to this.

[0145] In addition, in some exemplary embodiments, the side shading 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. In this way, it can be ensured that the side shading layer 800 can completely cover the notch portion 211 to further ensure the anti-light leakage effect.

[0146] Furthermore, in some exemplary embodiments, Fig.11 As shown, the side plate portion 320 has a bottom edge 322 connected to the bottom plate portion 310, wherein in a third direction Z perpendicular to the light emitting surface 100A, a spacing d5 between the side light shielding layer 800 and the bottom edge 322 is greater than or equal to 0. With the above solution, the side light shielding layer 800 can cover a portion of the side plate portion 320 along the third direction Z, but does not cover the bottom plate portion 310, that is, does not cover the backlight side of the back plate 300, so as to further ensure that interference with the entire machine housing and the like in the third direction Z is avoided.

[0147] If the size of the side shading layer 800 covering the side panel portion 320 along the third direction Z is too small, there may be problems such as insufficient adhesion. Therefore, illustratively, in the third direction Z perpendicular to the light emitting surface 100A, the width of the side shading layer 800 covering the side panel portion 320 is greater than or equal to 0.2 mm to ensure no light leakage. In some embodiments, the total thickness h4 of the side shading layer 800 along the third direction Z may be greater than or equal to 0.7 mm. However, this is not limited thereto.

[0148] In the backlight module provided in this embodiment, the side light shielding layer 800 can be realized by a glue dispensing process. Specifically, in the glue dispensing process, the glue barrel temperature, the feed port temperature, and the spray valve temperature have a great influence on the viscosity of the glue. The amount of glue discharged in advance and the amount of glue terminated in advance have a great influence on the thickness and width of the glue. During the glue dispensing process, it is necessary to sample several products every hour to confirm whether the glue thickness and width meet the requirements. After the glue is applied, the product needs to be left to solidify.

[0149] It should be noted that, in order to improve the problem of light leakage that may occur at the notch portion 211, only a few embodiments are listed above. In practical applications, the backlight module can also be any combination of the above embodiments, and the combinations of the above embodiments are no longer listed one by one.

[0150] Furthermore, in some exemplary embodiments, Fig.13 As shown, the backlight module further includes a reflective sheet 900, and the reflective sheet 900 is located between the bottom plate portion 310 and the light guide plate 100. After the light source in the backlight module emits light and enters the light guide plate 100, a portion of the light is incident on the light guide plate 100 for total reflection, and another portion is incident on the mesh points of the light guide plate 100 to destroy the total reflection, and the portion of light that destroys 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 portion of light back and emit it from the light exit surface 100A of the light guide plate 100.

[0151] In some exemplary embodiments of the present disclosure, Fig.13As shown in (a), the reflective sheet 900 is provided with a third through hole 910, and the orthographic projection area of ​​the third through hole 910 on the bottom surface 100B is smaller than the orthographic projection area of ​​the first through hole 111 on the bottom surface 100B, so that at least a partial area of ​​the reflective sheet 900 adjacent to the third through hole 910 is formed as 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 with the orthographic projection of the first through hole 111 on the bottom surface 100B, and the edge of the third through hole 910 radially expands outward compared to the edge of the second through hole 311, so that a sixth gap d6 is provided between the edge of the third through hole 910 and the edge of the second through hole 311.

[0152] Please combine Fig.13 As shown in (b), if the reflector 900 is offset, the actual size of the sixth gap d6 cannot be guaranteed to be the designed size value, that is, the reflector 900 cannot be guaranteed to be in the target position. If the sixth gap d6 is too large, the light reflected by the reflector 900 will be reduced, resulting in a darkening phenomenon at the position of the blind hole A.

[0153] In order to improve the above problems, in some exemplary embodiments of the present disclosure, Fig.14 As shown, a sinking area 312 is provided in the area of ​​the bottom plate portion 310 adjacent to the second through hole 311 , and the first reflective area S2 is fixed to the sinking area 312 by bonding with adhesive 500 .

[0154] By adopting the above scheme, the bottom plate part 310 is sunken in the area surrounding the second through hole 311, and fixed between the sunken area 312 and the first reflection area S2 by adhesive 500, it can prevent the reflector 900 from shifting, so as to reduce the influence of the shift of the reflector 900 on the light effect. At the same time, since the bottom plate part 310 is sunken, the stacking thickness of the bottom plate part 310 in the third direction Z can be kept unchanged.

[0155] It should be noted that the sinking design of the bottom plate portion 310 can be achieved by performing rib processing on the bottom plate portion 310 so that the area of ​​the bottom plate portion 310 surrounding the second through hole 311 sinks along the third direction Z.

[0156] For example, Fig.15As shown, the sinking height q1 of the sinking area 312 along the third direction Z can be 0.03±0.01mm; the radial width p of the sinking area 312 along the second through hole 311 can be 0.55±0.15mm; the thickness q2 of the adhesive 500 along the third direction Z can be 0.03±0.01mm; the radial width m of the adhesive 500 along the third through hole 910 is 0.2±0.1mm; considering the assembly tolerance, the edge of the adhesive 500 is kept at a distance n from the edge of the sinking area 312, and the distance n can be 0.2±0.1mm , thus, the edge position of the adhesive 500 can be effectively prevented from exceeding the sinking area 312 and causing interference; in addition, the first reflection area S2 is arranged circumferentially around the third through hole 910, and the width d9 of the first reflection area S2 along the radial direction of the third through hole 910 is 0.3-0.5 mm; the radial outward width of the edge of the third through hole 910 compared with the edge of the second through hole 311, that is, the value of the sixth gap d6 is 0.3 mm-0.15 mm, thus, the darkening phenomenon of the area behind the hole can be effectively reduced, and the darkening deterioration phenomenon behind the hole caused by the offset of the reflector 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 to this.

[0157] In addition, in some exemplary 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 relative to the first surface 314 along 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. In this way, the risk of wrinkles or unevenness of the reflective sheet 900 can be reduced.

[0158] Exemplarily, the fourth threshold value may be a value equal to 0 or close to 0. Specifically, the fourth threshold value may 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 also be noted that the term "in the same plane" may mean that two surfaces are arranged along the same plane within a micrometer range, for example, arranged along the same plane within 40μm, 30μm, 20μm, 10μm or 1μm.

[0159] In the backlight module provided in this embodiment, the back plate 300 can form the sinking area 312 by a rib pressing process, such as Fig.23As shown, a rib pressing mold 70 in a rib pressing device is used to press ribs on the bottom plate portion 310 to form the sinking area 312 . The width of the sinking area 312 can be adjusted by a corresponding structure on the rib pressing mold 70 .

[0160] In addition, in the backlight module provided in this embodiment, the reflective sheet 900 and the adhesive 500 can be punched out as one piece. Fig.24 As shown in (a), the raw material 500' of the adhesive 500 is bonded to the reflective sheet 900; then, Fig.24 As shown in (b), the reflective sheet 900 and the raw material 500 ′ of the adhesive 500 are punched and discarded together to obtain the reflective sheet 900 bonded with the adhesive 500 .

[0161] In some exemplary embodiments, Fig.15 As shown, in order to increase the structural stability of the module, at the position where the blind hole A is arranged, the bottom plate portion 310 of the back plate 300 is provided with a second through hole 311 at a position corresponding to the first through hole 111, and the second through hole 311 at least partially overlaps with the orthographic projection of the first through hole 111 on the bottom surface 100B, and the bottom plate portion 310 is provided with a supporting edge 313 folded along a third direction Z toward the side where the light guide plate 100 is located, and the third direction Z is perpendicular to the light emitting surface 100A.

[0162] In the backlight module provided in the embodiment of the present disclosure, the light effect around the hole of the product can be improved by improving the side wall of the notch portion 211 and / or by anti-deviating design of the reflector 900.

[0163] Taking the backlight module in some embodiments of the present disclosure as a physical test example and the backlight module in the related art as a control example, 13 points around the hole are used to perform brightness uniformity test (testing the minimum brightness / maximum brightness of the 13 points) and optical software simulation. The distribution positions of the 13 test points relative to the blind hole A are as follows: Fig.16 As shown in the figures 1 to 13.

[0164] The test results are as follows: the brightness uniformity of the 13 points in the actual test example is 83%, the brightness uniformity of the 13 points in the optical software simulation result is 82%, and the brightness uniformity of the 13 points in the control example is 83%. It can be seen that the brightness uniformity of the 13 points in the backlight module provided by the embodiment of the present disclosure is improved compared with the brightness uniformity of the backlight module of the related art.

[0165] In addition, the embodiment of the present disclosure further provides a display device, including: a display panel 10 and a backlight module provided by the embodiment of the present disclosure.

[0166] 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 overlaps with the orthographic projection of the first through hole 111 on the light exit surface 100A, and the first area AA1 may be a position corresponding to the blind hole A; the display panel 10 includes a first side corresponding to the first side edge 112, wherein in the first direction Y, the spacing between the first side and the first area AA1 is less than or equal to 1.88 mm. That is, in the display device provided in the embodiment of the present disclosure, the blind hole positioning size may be less than or equal to 1.88 mm, for example, the blind hole positioning size may be 1.48 mm.

[0167] Obviously, the display device provided by the embodiment of the present disclosure also has the beneficial effects brought by the backlight module provided by the embodiment of the present disclosure, which will not be elaborated here.

[0168] There are a few points to note:

[0169] (1) The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure, and other structures may refer to the general design.

[0170] (2) For the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the thickness of layers or regions is exaggerated or reduced, that is, these drawings are not drawn according to the actual scale. It is understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "under" another element, the element may be "directly" "on" or "under" the other element or there may be intermediate elements.

[0171] (3) In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0172] The above are only specific implementations of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and the protection scope of the present disclosure shall be based on the protection scope of the claims.

Claims

1. A backlight module, characterized in that: include: A light guide plate having a light emitting surface and a bottom surface disposed opposite to each other; and A plastic frame surrounds the outer periphery of the light emitting surface of the light guide plate; wherein, The light guide plate comprises a main body portion and a protruding portion, the main body portion is provided with a first through hole penetrating the light emitting surface and the bottom surface, the main body portion comprises a first side edge and a second side edge opposite to each other along 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 a center point of the first through hole and the second side edge; The protruding portion is formed by the first side edge extending in the first direction in a direction away from the first through hole, and the first through hole at least partially overlaps with the orthographic projection of the protruding portion on a first projection plane, and the first projection plane is perpendicular to the light emitting surface and the first direction; the rubber frame includes a first side frame corresponding to the first side edge, and the first side frame is provided with a notch portion at a position corresponding to the protruding portion, and the protruding portion at least partially extends into the notch portion.

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

3. The backlight module according to claim 2, characterized in that: The backlight module further includes a back plate, the back plate includes a side plate portion, and the side plate portion is located at the periphery of the plastic frame; Among them, in the first direction, there is a first gap d1 between the area of ​​the first side except the protruding part and the rubber frame, and there is a second gap d2 between the protruding part and the side panel part; the difference between d1 and d2 is less than or equal to the first threshold.

4. The backlight module according to claim 3, characterized in that: Along a second direction, the protruding portion has a first edge and a second edge opposite to each other, and the notch portion has a first side wall and a second side wall opposite to each other, and 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, and the second edge and the second side wall are located on the same side of the protruding portion; wherein, There is a third gap d3 between the first edge and the first side wall; A fourth gap d4 is defined between the second edge and the second side wall; A 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 plane completely covers the orthographic projection of the first through hole on the first projection plane.

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 edge, and the first through hole has a second width along the extension direction of the first side edge; wherein the center point of the protruding portion in the extension direction of the first side edge and the center point of the first through hole have the same orthographic projection on 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 recess portion has a first side wall and a second side wall relative to each other, and the second direction intersects with the first direction; the first side wall and the second side wall are both inclined surfaces or curved surfaces, and the inclined surfaces or curved surfaces are configured so that the opening size of the recess portion on the side close to the light guide plate in the first direction is larger than the opening size on the side away from the light guide plate.

8. The backlight module according to claim 7, characterized in that: Along the second direction, the protruding portion has a first edge and a second edge relative to each other, the first edge and the first side wall are located on the same side of the protruding portion, the first edge is a slope or a curved surface adapted to the shape of the first side wall, the second edge and the second side wall are located on the same side of the protruding portion, the second edge is a slope or a curved surface adapted to the shape of the second side wall.

9. The backlight module according to claim 7, characterized in that: When the first side wall and the second side wall are inclined surfaces, a value range of an angle α of either the first side wall or the second side wall relative to the second direction is 135±10°.

10. The backlight module according to claim 1, characterized in that: The backlight module also includes: A back plate, comprising a bottom plate portion and a side plate portion, wherein the bottom plate portion is located on one side of the bottom surface of the light guide plate, and the side plate portion is located on the periphery of the plastic frame; and The light-shielding tape comprises a tape main body and an extension portion; wherein: The plastic frame comprises a top and a bottom which are opposite to each other along a third direction, and the top faces the light emitting direction of the light guide plate, and the third direction is perpendicular to the light emitting surface; The tape body surrounds the periphery of the light guide plate and is attached to the surface of the top. The extension portion is arranged at a position corresponding to the protruding portion, extends from the tape body, folds toward 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 edge, 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.

12. The backlight module according to claim 1, characterized in that: The backlight module also includes: A back plate, comprising a side plate portion, the side plate portion is located at the periphery of the plastic frame, the side plate portion has a top edge facing the light emitting direction of the light guide plate, and the top edge of the side plate portion is provided with a folded edge extending along the first direction toward the direction close to the light guide plate at a position corresponding to the notch portion; and The light-shielding tape, the tape frame 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 for attaching 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 plastic frame includes a first side frame corresponding to the first side edge, the first side frame has a sixth width along the first direction, and the folded edge has a seventh width along the first direction, wherein a 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: A back plate, comprising a bottom plate portion and a side plate portion, wherein the bottom plate portion is located on one side of the bottom surface of the light guide plate, and the side plate portion is located on the periphery of the plastic frame; and A side light shielding layer, wherein a surface of the side plate portion located away from the first through hole along the first direction is an outer side surface; Wherein, the side shading layer is located at a position corresponding to the protruding portion and at least covers a portion of the outer side surface of the side plate portion.

16. The backlight module according to claim 15, characterized in that: The film thickness of the side light-shielding layer in a direction perpendicular to the outer side 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, a spacing 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 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.

19. The backlight module according to claim 1, characterized in that: The backlight module also includes: A back plate, comprising a bottom plate portion located on one side of the bottom surface of the light guide plate, wherein a second through hole is provided on the bottom plate portion, wherein the second through hole at least partially overlaps with an orthographic projection of the first through hole on the bottom surface, and a sinking area is provided in an area of ​​the bottom plate portion adjacent to the second through hole; A reflective sheet is located between the bottom plate portion and the light guide plate, and a third through hole is provided on the reflective sheet. 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 area of ​​the reflective sheet adjacent to the third through hole is not covered by the light guide plate to form a first reflective area, and the first reflective area is fixed to the sinking area 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 radial width of the sinking area along the second through hole is 0.55±0.15mm; the thickness of the adhesive along the third direction is 0.03±0.01mm; the radial width of the adhesive along the third through hole is 0.2±0.1mm; the spacing between the edge of the adhesive and the edge of the sinking area is 0.2±0.1mm; the radial width of the first reflection area along the third through hole is 0.3~0.5mm; the radial outward 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 bottom plate portion has a first surface facing the reflector, and a difference between a sinking height of the sinking area relative to the first surface along a third direction and a thickness of the adhesive is less than or equal to a fourth threshold.

22. A display device, characterized in that: include: Display panel; and A backlight module as claimed 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, the display area includes a first area and a second area surrounding the first area, the first area at least partially overlaps with the orthographic projection of the first through hole on the light-emitting surface, and the display panel includes a first side corresponding to the first side edge, wherein in the first direction, the spacing between the first side and the first area is less than or equal to 1.88 mm.

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