Backlight module and display terminal

Abstract

The utility model relates to a backlight module and a display terminal. The backlight module comprises a backlight main body and an opening adhesive; the opening glue is adhered to the edge of the backlight main body, the opening glue comprises a plurality of adhering sections, the ends, close to each other, of every two adjacent adhering sections are overlapped to form an overlapping part, at least one of the adhering sections and the backlight main body is provided with a thinned opening in the area corresponding to the overlapping part, and the area of the thinned opening is larger than or equal to that of the overlapping part. According to the backlight module, the ends, close to each other, of the two adjacent bonding sections are overlapped to form the overlapping part, so that light leakage between the two adjacent bonding sections is avoided; the thinning opening is formed in the area, corresponding to the overlapping part, of at least one of the bonding section and the backlight body, and the area of the thinning opening is larger than that of the overlapping part, so that the total thickness of the backlight module in the area corresponding to the overlapping part is reduced, and the upper surface of the opening glue is as flat as possible.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a backlight module and display terminal. Background Technology

[0002] Backlight modules provide a backlight source for LCD panels and other components. Adhesive tape is applied to the edges of the backlight module; this tape serves two purposes: shielding the edge light from the backlight module and bonding it to the LCD panel. To reduce the material cost of the adhesive tape, related technologies often use multi-segment adhesive tape. However, due to assembly precision limitations, gaps must be left at the joints to prevent overlap and unevenness. However, leaving these gaps introduces a risk of light leakage.

[0003] Therefore, it is urgent to solve the above-mentioned technical problems. Utility Model Content

[0004] This application provides a backlight module and display terminal to solve the technical problem that gaps need to be reserved at the splicing points to prevent the adhesive from overlapping and causing unevenness on the adhesive surface, but there is a risk of light leakage at the gaps after the gaps are reserved.

[0005] To achieve the above objectives, according to a first aspect of this application, a backlight module is provided, comprising:

[0006] Backlit main body;

[0007] Adhesive is used to bond the edge of the backlight body. The adhesive includes multiple adhesive segments. The ends of two adjacent adhesive segments overlap to form an overlapping portion. At least one of the adhesive segments and the backlight body has a thinning opening in the area corresponding to the overlapping portion. The area of ​​the thinning opening is greater than or equal to the area of ​​the overlapping portion.

[0008] Optionally, the plurality of adhesive segments include a first tape extending in a first direction and a second tape extending in a second direction, the first direction intersecting the second direction, the ends of the first tape and the second tape overlapping each other to form the overlapping portion, and at least one of the first tape and the second tape having the thinning opening in the region corresponding to the overlapping portion.

[0009] Optionally, the first tape has the thinning opening on the side near the second tape, and the second tape has the thinning opening on the side near the first tape.

[0010] Optionally, the plurality of adhesive segments further include a third tape extending along the second direction, the third tape overlapping the second tape at one end close to each other to form another overlapping portion, the two overlapping portions being spaced apart in the second direction, and at least one of the second tape and the third tape having the thinning opening in the region corresponding to the other overlapping portion.

[0011] Optionally, both the first tape and the third tape are disposed on the side of the second tape away from the backlight body, the first tape has the thinning opening on the side near the second tape, and the third tape has the thinning opening on the side near the second tape.

[0012] Optionally, the second tape may not have the thinning opening.

[0013] Optionally, in the second direction, the distance between the two overlapping portions is less than the width of the third tape.

[0014] Optionally, the plurality of adhesive segments include a first tape extending in a first direction and a second tape extending in a second direction, wherein the first tape and the second tape overlap at their close ends to form the overlapping portion, and the backlight body has the thinning opening in the region corresponding to the overlapping portion, and the overlapping portion is received within the thinning opening.

[0015] Optionally, the adhesive segment includes a substrate layer and adhesive layers located on opposite sides of the substrate layer, wherein the depth of the thinning opening of the adhesive segment is less than the thickness of the adhesive layer.

[0016] According to a second aspect of this application, a display terminal is provided, including the backlight module described above.

[0017] In the backlight module of this application embodiment, two adjacent adhesive segments overlap at their closest ends to form an overlapping portion, thereby avoiding light leakage between the two adjacent adhesive segments; by providing a thinning opening in the area of ​​the corresponding overlapping portion in at least one of the adhesive segments and the backlight body, and the area of ​​the thinning opening is larger than the area of ​​the overlapping portion, the total thickness of the backlight module in the area of ​​the corresponding overlapping portion is reduced, and the upper surface of the adhesive is made as flat as possible.

[0018] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0021] Figure 1 This is a top view of a backlight module provided in an exemplary embodiment of this disclosure;

[0022] Figure 2A yes Figure 1 A magnified structural diagram at point B in the middle;

[0023] Figure 2B yes Figure 2A An exploded view of part of the structure;

[0024] Figure 2C yes Figure 2A A schematic diagram of the cross-sectional structure of the overlapping part in the middle;

[0025] Figure 3A yes Figure 1 Another enlarged structural diagram at point B;

[0026] Figure 3B yes Figure 3A An exploded view of part of the structure;

[0027] Figure 3C yes Figure 3A A schematic diagram of the cross-sectional structure of the overlapping part in the middle;

[0028] Figure 4A yes Figure 1 Another enlarged structural diagram at point B;

[0029] Figure 4B yes Figure 4A An exploded view of part of the structure;

[0030] Figure 4C yes Figure 4A A schematic diagram of the cross-sectional structure at point CC;

[0031] Figure 5 This is a schematic diagram of the structure of a display terminal provided in an exemplary embodiment of this disclosure.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1-Backlight module; VA-Light emission area; NA-Border area; 1a-Thinning opening;

[0034] 10-Backlight main body; 11-Light guide plate; 12-Optical film; 13-Back plate; 131-Bottom plate; 132-Side plate; 14-Middle frame; 141-Connecting part; 142-Bearing part; 15-Reflective sheet; 16-Reflective strip;

[0035] 20 - Adhesive tape; 21 - Bonding section; 211 - First tape; 212 - Second tape; 213 - Third tape; 210 - Substrate layer; 220 - Adhesive layer; 201 - Overlapping portion;

[0036] h1 - Depth of the thinning opening 1a of the adhesive segment 21;

[0037] h2 - Depth of the thinning opening 1a of the backlight body 10;

[0038] w1 - Width of the 20mm glue strip; w2 - Width of the border area NA;

[0039] s1 - the distance between the two overlapping parts 201;

[0040] D1 - First direction; D2 - Second direction;

[0041] 2-Display terminal; 3-Display panel. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0043] To achieve the above objectives, according to the first aspect of this application, such as Figures 1 to 4C As shown, a backlight module 1 is provided, including a backlight body 10 and adhesive 20; the adhesive 20 is bonded to the edge of the backlight body 10, and the adhesive 20 includes a plurality of adhesive segments 21, with the ends of two adjacent adhesive segments 21 overlapping to form an overlapping portion 201, and at least one of the adhesive segments 21 and the backlight body 10 having a thinning opening 1a in the area corresponding to the overlapping portion 201, the area of ​​the thinning opening 1a being greater than or equal to the area of ​​the overlapping portion 201.

[0044] like Figure 1As shown, the backlight module 1 is used to provide a backlight source for LCD panels, etc. The backlight module 1 includes a backlight body 10 and adhesive 20. One side surface of the backlight body 10 is a light-emitting surface, from which light is emitted, and the adhesive 20 is bonded to the edge of the light-emitting surface of the backlight body 10.

[0045] like Figure 1 As shown, the backlight module 1 includes a light-emitting area VA and a bezel area NA disposed around the light-emitting area VA. The light-emitting area VA can emit light, while the bezel area NA cannot emit light. The light-emitting area VA can correspond to the display area of ​​the LCD panel, thereby illuminating the entire display area of ​​the LCD panel. Adhesive 20 is located within the bezel area NA, and the adhesive 20 is disposed around the perimeter of the light-emitting area VA, thereby preventing light leakage from the bezel area NA.

[0046] In some embodiments, such as Figure 2A As shown, the width w1 of the adhesive tape 20 can be less than or equal to the width w2 of the border area NA. The sidewall of the adhesive tape 20 closest to the light-emitting area VA coincides with the outline of the light-emitting area VA, while the sidewall of the adhesive tape 20 furthest from the light-emitting area VA coincides with or is spaced from the outline of the backlight body 10. This means that the adhesive tape 20 can be attached to the border area NA and enclose the area of ​​the light-emitting area VA.

[0047] like Figure 4C As shown, the backlight body 10 includes a back plate 13. The back plate 13 includes a base plate 131 and a side plate 132 disposed around the base plate 131, the side plate 132 and the base plate 131 enclosing a receiving space. The backlight body 10 also includes a light source assembly disposed within the receiving space.

[0048] In some embodiments, the material of the back plate 13 may be stainless steel, iron, aluminum or other metal materials.

[0049] The light source assembly may include a reflective sheet 15, a light guide plate 11, and an optical film 12 stacked sequentially. A light strip (not shown) is also disposed within the accommodating space, corresponding to one side wall of the light guide plate 11. The light strip includes multiple LEDs, which may be LEDs or the like. Light emitted from the LEDs is incident on the side wall of the light guide plate 11, and conducted through the light guide plate 11 to the entire plane of the light guide plate 11, thereby forming a planar light source.

[0050] In some embodiments, the light guide plate 11 may be made of a transparent polymer material, such as polymethyl methacrylate (PMMA) or polycarbonate (PC).

[0051] like Figure 4CAs shown, the reflector 15 is disposed on the side of the light guide plate 11 near the base plate 131. The reflector 15 is mainly used to reflect the light emitted from the bottom of the light guide plate 11 back into the light guide plate 11, so that it can be concentrated and emitted from the front of the light guide plate 11, reducing light loss and increasing the light source efficiency of the backlight module 1.

[0052] In some embodiments, such as Figure 4C As shown, reflective strips 16 are provided on the other sidewalls of the light guide plate 11 that are not provided with light strips. The reflective strips 16 are used to reflect the light emitted from the side of the light guide plate 11, so that it can be concentrated and projected from the front, further reducing light loss and increasing the light source efficiency of the backlight module 1.

[0053] like Figure 4C As shown, the optical film 12 is disposed on the side of the light guide plate 11 away from the base plate 131. The optical film 12 may include diffuser sheets, prism sheets, etc., stacked sequentially. The diffuser sheet is used to diffusely reflect the light emitted from the light guide plate 11, so that the light is evenly distributed on the light-emitting surface, effectively homogenizing the light. The prism sheet is disposed on the side of the diffuser sheet away from the light guide plate 11. The prism sheet corrects the direction of the light through the principle of light refraction and reflection, concentrating the scattered light towards the front, thereby improving the brightness of the backlight module 1.

[0054] The light-emitting surface of the backlight module 1 refers to the side surface of the optical film 12 that faces away from the base plate 131. The light-emitting surface of the backlight module 1 is arranged corresponding to the display area of ​​the liquid crystal panel, which means that the backlight module 1 can provide a planar light source for at least the entire display area of ​​the liquid crystal panel.

[0055] In some embodiments, such as Figure 4C As shown, the backlight body 10 also includes a middle frame 14, which is disposed in the receiving cavity and is disposed corresponding to the edge of the back plate 13. The middle frame 14 is used to fix the light source assembly, ensure the structural stability of the backlight body 10, and also play a certain role in light shielding and protection.

[0056] In some embodiments, the material of the middle frame 14 can be plastic or the like. The middle frame 14 can be integrally formed by injection molding. Specifically, after heating and melting the plastic raw material, it is injected into a specific mold cavity, cooled and solidified inside the mold, and the middle frame 14 is formed in one step.

[0057] like Figure 4C As shown, the middle frame 14 may include a connecting portion 141 and a support portion 142 connected to the connecting portion 141. The connecting portion 141 may engage with the side plate 132 of the back plate 13, but is not limited thereto. The support portion 142 may extend into the receiving space of the back plate 13, and a limiting structure may be provided on the support portion 142 to achieve positioning of the optical film 12 and prevent the optical film 12 from moving within the receiving space of the back plate 13.

[0058] The adhesive 20 is a double-sided adhesive with light-shielding capability. The side of the adhesive 20 closest to the backlight body 10 is used to bond with the backlight body 10, and the side of the adhesive 20 away from the backlight body 10 can be used to bond with external structures such as LCD panels.

[0059] Specifically, such as Figure 4C As shown, the adhesive 20 can be bonded to the edge of the optical film 12 and the edge of the middle frame 14 on the side surface near the backlight body 10, thereby preventing light leakage at the gap between the optical film 12 and the middle frame 14 and avoiding the problem of bright lines at the edges.

[0060] In some embodiments, such as Figure 2C As shown, the adhesive segment 21 includes a substrate layer 210 and adhesive layers 220 located on opposite sides of the substrate layer 210.

[0061] In some embodiments, the substrate layer 210 may be made of polyethylene terephthalate (PET), polyimide (PI), or the like. The substrate layer 210 is doped with black pigment to achieve a light-shielding function.

[0062] In some embodiments, the adhesive layer 220 is an adhesive, such as an acrylic adhesive, and the adhesive layer 220 is tacky for bonding. The adhesive can be applied to the substrate layer 210 and cured to form the adhesive segment 21, but is not limited thereto.

[0063] In some embodiments, the thickness of the adhesive segment 21 may be from 0.05 mm to 0.06 mm, but is not limited thereto.

[0064] In some embodiments, the thickness of the substrate layer 210 may be 0.02 mm, and the thickness of a single adhesive layer 220 may be 0.015 mm.

[0065] In other embodiments, the thickness of the substrate layer 210 may be 0.03 mm, and the thickness of a single adhesive layer 220 may be 0.015 mm.

[0066] In other embodiments, the thickness of the substrate layer 210 may be 0.02 mm, and the thickness of the individual adhesive layer 220 may be 0.02 mm.

[0067] like Figure 1 and Figure 2A As shown, the shape of the adhesive strip 20 is set according to the shape of the light-emitting area VA of the backlight body 10. For example, when the shape of the light-emitting area VA of the backlight body 10 is circular, the shape of the adhesive strip 20 is annular. When the shape of the light-emitting area VA of the backlight body 10 is rectangular, the shape of the adhesive strip 20 is frame-shaped.

[0068] The tape 20 can be formed through a cutting process. For example, the required shape can be cut from the tape base material. However, when the tape 20 is a closed pattern such as a ring or frame, there is a lot of waste material after cutting, resulting in higher costs. Therefore, in related technologies, the tape 20 is usually divided into multiple segments, with adjacent segments spliced ​​together to reduce production costs. However, due to assembly precision limitations, gaps need to be reserved at the splicing points of the tape 20 to prevent excessive thickness caused by overlapping. However, reserving gaps poses a risk of light leakage at the gaps.

[0069] In response to the above problems, such as Figure 1 and Figure 2A As shown, in this application, the adhesive 20 is configured to include a plurality of adhesive segments 21, with the ends of two adjacent adhesive segments 21 overlapping to form an overlapping portion 201. At least one of the adhesive segments 21 and the backlight body 10 has a thinning opening 1a in the area corresponding to the overlapping portion 201, and the area of ​​the thinning opening 1a is greater than or equal to the area of ​​the overlapping portion 201.

[0070] Since the adhesive section 21 is a non-closed pattern, its arrangement on the base material can be more compact, thereby reducing waste during base material cutting and lowering production costs.

[0071] In some embodiments, the shape of the adhesive segment 21 can be rectangular, L-shaped, fan-shaped, etc., and the shape of the adhesive segment 21 can be set according to the shape of the light-emitting region VA, which is not limited in this application. It should be noted that an adhesive segment 21 can extend in one direction, for example, the adhesive segment 21 is rectangular. Alternatively, an adhesive segment 21 can extend in two directions, for example, the adhesive segment 21 is L-shaped. Or the adhesive segment 21 can extend in multiple directions, such as the adhesive segment 21 is fan-shaped.

[0072] In a backlight module 1, the adhesive 20 can be composed of adhesive segments 21 of the same shape, or the adhesive 20 can be composed of adhesive segments 21 of various different shapes. This application does not limit this.

[0073] like Figures 1 to 2C As shown, two adjacent adhesive segments 21 overlap at their closest ends to form an overlapping portion 201. That is, two adjacent adhesive segments 21 are stacked at their ends and bonded to each other. Since the overlapping portion 201 is formed by two layers of adhesive segments 21, the thickness of the overlapping portion 201 is greater than the thickness of a single layer of adhesive segment 21. To avoid the overlapping portion 201 being too thick and causing the surface of the adhesive 20 to be uneven, at least one of the adhesive segments 21 and the backlight body 10 can be provided with a thinning opening 1a in the area corresponding to the overlapping portion 201, thereby reducing the height difference of the adhesive 20 surface and improving the surface flatness of the adhesive 20.

[0074] like Figures 2A to 3CAs shown, at least one of the adhesive segment 21 and the backlight body 10 has a thinning opening 1a in the region corresponding to the overlapping portion 201. The thinning opening 1a in the region corresponding to the overlapping portion 201 means that the thickness of the adhesive segment 21 in that region is less than the thickness of the adhesive segment 21 in other regions. In this application, the thickness direction refers to the direction perpendicular to the light-emitting surface of the backlight module 1. The thinning opening 1a thins the adhesive segment 21 in the thickness direction.

[0075] like Figures 4A to 4C As shown, the backlight body 10 has a thinning opening 1a in the area corresponding to the overlapping part 201, which means that the backlight body 10 has a thinning opening 1a in the area directly below the overlapping part 201. The thinning opening 1a causes the surface of the backlight body 10 to be recessed downward, forming a space to accommodate the overlapping part 201.

[0076] In some embodiments, a thinning opening 1a is provided on one adhesive segment 21 corresponding to the overlapping portion 201, a thinning opening 1a is not provided on another adhesive segment 21, and a thinning opening 1a is not provided on the backlight body 10.

[0077] In other embodiments, thinning openings 1a are provided on both adhesive segments 21 corresponding to the overlapping portion 201, while thinning openings 1a are not provided on the backlight body 10.

[0078] In some other embodiments, the thinning opening 1a is not provided on the overlapping portion 201, but the thinning opening 1a is provided in the area of ​​the backlight body 10 corresponding to the overlapping portion 201.

[0079] The area of ​​the thinning opening 1a refers to the area of ​​the orthographic projection of the thinning opening 1a onto the light-emitting surface of the backlight module 1, and the area of ​​the overlapping portion 201 refers to the area of ​​the orthographic projection of the overlapping portion 201 onto the light-emitting surface of the backlight module 1. The area of ​​the thinning opening 1a is greater than or equal to the area of ​​the overlapping portion 201, which means that the thinning opening 1a of the overlapping portion 201 can at least accommodate another adhesive segment 21 in the overlapping portion 201, or the thinning opening 1a of the backlight body 10 can at least accommodate the overlapping portion 201.

[0080] Optionally, such as Figures 2A to 3C As shown, the plurality of adhesive segments 21 include a first adhesive tape 211 extending along a first direction D1 and a second adhesive tape 212 extending along a second direction D2. The first direction D1 intersects the second direction D2. The first adhesive tape 211 and the second adhesive tape 212 overlap at their close ends to form an overlap portion 201. At least one of the first adhesive tape 211 and the second adhesive tape 212 has a thinning opening 1a corresponding to the region of the overlap portion 201.

[0081] In some embodiments, the included angle between the first direction D1 and the second direction D2 can be an acute angle, a right angle, or an obtuse angle. The accompanying drawings of this application use a right angle as an example for illustration, but this should not be construed as a limitation of this application.

[0082] like Figure 2A and Figure 3A As shown, the first tape 211 extending along the first direction D1 means that the length of the first tape 211 in the first direction D1 is greater than its length in other directions. The second tape 212 extending along the second direction D2 means that the length of the second tape 212 in the second direction D2 is greater than its length in other directions. The first tape 211 and the second tape 212 can overlap at the corners of the backlight body 10, thereby avoiding light leakage at the corners.

[0083] In some embodiments, such as Figure 3B As shown, the first tape 211 has a thinning opening 1a in the region corresponding to the overlapping portion 201, while the second tape 212 does not have a thinning opening 1a in the region corresponding to the overlapping portion 201.

[0084] In some embodiments, such as Figure 2B As shown, the first tape 211 has a thinning opening 1a in the region corresponding to the overlapping portion 201, and the second tape 212 also has a thinning opening 1a in the region corresponding to the overlapping portion 201.

[0085] When the first tape 211 has a thinning opening 1a, the area of ​​the thinning opening 1a of the first tape 211 needs to be larger than the area of ​​the overlapping portion 201. When the second tape 212 has a thinning opening 1a, the area of ​​the thinning opening 1a of the second tape 212 needs to be larger than the area of ​​the overlapping portion 201.

[0086] It should be understood that the depth of the thinning opening 1a of the first adhesive tape 211 may be the same as or different from the depth of the thinning opening 1a of the second adhesive tape 212. After the thinning opening 1a is provided, the surfaces of the first adhesive tape 211 and the second adhesive tape 212 that are close to each other are bonded together.

[0087] Optionally, such as Figure 2B and Figure 2C As shown, the first adhesive tape 211 has a thinning opening 1a on the side near the second adhesive tape 212, and the second adhesive tape 212 has a thinning opening 1a on the side near the first adhesive tape 211. By thinning the upper surface of the first adhesive tape 211 and the lower surface of the second adhesive tape 212, the upper surface of the first adhesive tape 211 and the lower surface of the second adhesive tape 212 are bonded together.

[0088] It should be noted that, in this application, the upper surface of each adhesive segment 21 refers to the side surface of the adhesive segment 21 that is away from the backlight body 10, and the lower surface of each adhesive segment 21 refers to the side surface of the adhesive segment 21 that is close to the backlight body 10.

[0089] In some embodiments, such as Figure 2C As shown, the adhesive layer 220 on one side of the upper surface of the first tape 211 and the adhesive layer 220 on one side of the lower surface of the second tape 212 can be thinned. Through this arrangement, the adhesive layer 220 on the lower surface of the second tape 212 can be bonded to the adhesive layer 220 on the upper surface of the second tape 212, thereby placing the substrate layer 210 of the first tape 211 and the substrate layer 210 of the second tape 212 on a relatively flat plane, reducing the risk of wrinkles in the substrate layer 210 due to the height difference of the bonding surfaces.

[0090] It should be noted that when the adhesive section 21 is provided with a thinning opening 1a, the thinning opening 1a can be provided only on the adhesive layer 220 on one side of the substrate layer 210, or the thinning opening 1a can be provided on the adhesive layers 220 on both sides of the substrate layer 210.

[0091] Optionally, such as Figures 3A to 3C As shown, the plurality of adhesive segments 21 also include a third adhesive tape 213 extending along the second direction D2. The third adhesive tape 213 overlaps with the second adhesive tape 212 at one end close to each other to form another overlapping portion 201. The two overlapping portions 201 are spaced apart in the second direction D2. At least one of the second adhesive tape 212 and the third adhesive tape 213 has a thinning opening 1a in the region corresponding to the other overlapping portion 201.

[0092] Both the second tape 212 and the third tape 213 extend along the second direction D2, and the length of the third tape 213 in the second direction D2 is greater than its length in other directions.

[0093] like Figure 3A and Figure 3C As shown, the second tape 212 and the third tape 213 overlap at their closest points to form another overlapping portion 201, and the two overlapping portions 201 are spaced apart in the second direction D2. This means that the third tape 213 does not overlap with the first tape 211. The overlapping portions 201 formed by the first tape 211 and the second tape 212, and the overlapping portions 201 formed by the second tape 212 and the third tape 213, are spaced apart in the second direction D2.

[0094] In some embodiments, the second tape 212 is provided with a thinning opening 1a in the region corresponding to the overlapping portion 201, while the third tape 213 is not provided with a thinning opening 1a in the region corresponding to the overlapping portion 201.

[0095] In some embodiments, the second tape 212 is provided with a thinning opening 1a in the region corresponding to the overlapping portion 201, and the third tape 213 is also provided with a thinning opening 1a in the region corresponding to the overlapping portion 201.

[0096] In some embodiments, such as Figure 3B As shown, the second tape 212 does not have a thinning opening 1a in the area corresponding to the overlapping portion 201, while the third tape 213 has a thinning opening 1a in the area corresponding to the overlapping portion 201.

[0097] Optionally, such as Figures 3A to 3C As shown, the first tape 211 and the third tape 213 are both disposed on the side of the second tape 212 away from the backlight body 10. The first tape 211 has a thinning opening 1a on the side close to the second tape 212, and the third tape 213 has a thinning opening 1a on the side close to the second tape 212.

[0098] In some embodiments, combined with Figure 3B and 3C The adhesive layer 220 on one side of the lower surface of the first tape 211 is thinned to form a thinning opening 1a, and the lower surface of the first tape 211 is bonded to the upper surface of the second tape 212. The adhesive layer 220 on one side of the lower surface of the third tape 213 is thinned to form a thinning opening 1a, and the lower surface of the third tape 213 is bonded to the upper surface of the second tape 212.

[0099] Optionally, such as Figures 3A to 3C As shown, the second tape 212 does not have a thinning opening 1a. This means that the second tape 212 is a tape of uniform thickness, and the adhesive layer 220 of the second tape 212 does not have a thinning opening 1a.

[0100] In some embodiments, the width of the second tape 212 is less than or equal to the width of the third tape 213.

[0101] In some embodiments, the length of the second tape 212 is greater than or equal to the sum of the distance between the two overlapping portions 201 in the second direction D2, the width of the first tape 211, and the width of the third tape 213.

[0102] Optionally, such as Figure 3A and Figure 3C As shown, in the second direction D2, the distance s1 between the two overlapping portions 201 is less than the width of the third tape 213. The distance s1 between the two overlapping portions 201 refers to the width of the gap between the edges of the overlapping portions 201 that are close to each other. The distance s1 between the two overlapping portions 201 is less than the width of the third tape 213, which means that the distance between the two overlapping portions 201 is small. By attaching a second tape 212 between the first tape 211 and the third tape 213, the gap at the joint between the first tape 211 and the third tape 213 can be covered by the second tape 212, preventing light leakage at the gap.

[0103] In some embodiments, the thickness of the second tape 212 is equal to the depth of the thinning opening 1a of the first tape 211, and the thickness of the second tape 212 is equal to the depth of the thinning opening 1a of the third tape 213, so that the second tape 212 just fills the thinning opening 1a, making the upper surface of the adhesive 20 flat.

[0104] In some embodiments, the thickness of the second tape 212 is less than the depth of the thinning opening 1a of the first tape 211, and the thickness of the second tape 212 is less than the depth of the thinning opening 1a of the third tape 213, so that the upper surface of the overlapping portion 201 is not higher than the upper surface of other areas of the adhesive section 21.

[0105] Optionally, such as Figures 4A to 4C As shown, the multiple adhesive segments 21 include a first adhesive tape 211 extending along a first direction D1 and a second adhesive tape 212 extending along a second direction D2. The ends of the first adhesive tape 211 and the second adhesive tape 212 that are close to each other overlap to form an overlap portion 201. The backlight body 10 is provided with a thinning opening 1a in the area corresponding to the overlap portion 201, and the overlap portion 201 is accommodated in the thinning opening 1a.

[0106] In some embodiments, such as Figure 4B As shown, the backlight body 10 includes a middle frame 14, with a thinning opening 1a disposed on the upper surface of the middle frame 14. The upper surface of the middle frame 14 is opposite to the lower surface of the adhesive section 21. By providing the thinning opening 1a on the upper surface of the middle frame 14, the overlapping portion 201 can be accommodated within the thinning opening 1a. Since the thickness of the overlapping portion 201 is greater than the thickness of a single layer of the adhesive section 21, if the thinning opening 1a is not provided on the backlight body 10, the upper surface of the overlapping portion 201 will be higher than the upper surface of other areas in the adhesive section 21, resulting in an uneven upper surface of the adhesive 20. However, by providing the thinning opening 1a on the backlight body 10, the overlapping portion 201 can be accommodated within the thinning opening 1a, thereby making the upper surface of the overlapping portion 201 as flush as possible with the upper surface of other areas in the adhesive section 21.

[0107] In some embodiments, such as Figure 4B and Figure 4C As shown, the thinning opening 1a can be provided on the side surface of the support portion 142 near the adhesive 20. A portion of the adhesive 20 near the backlight body 10 is bonded to the support portion 142, and a portion of the adhesive 20 is bonded to the optical film 12. The adhesive 20 blocks the gap between the support portion 142 and the optical film 12 to avoid the problem of bright lines at the edges.

[0108] like Figure 4CAs shown, in order to allow the overlapping portion 201 to be completely contained within the thinning opening 1a, the area of ​​the thinning opening 1a of the backlight body 10 is greater than or equal to the area of ​​the overlapping portion 201, and the depth h2 of the thinning opening 1a of the backlight body 10 is greater than or equal to the thickness of the adhesive segment 21.

[0109] In some embodiments, such as Figure 4C As shown, the area of ​​the thinning opening 1a of the backlight body 10 is slightly larger than the area of ​​the overlapping portion 201, so that even if there is an assembly deviation in the overlapping portion 201, it can still be easily accommodated in the thinning opening 1a. For example, the distance between the edge of the thinning opening 1a and the edge of the overlapping portion 201 can be greater than or equal to 0.15 mm, thereby overcoming the influence of assembly deviation.

[0110] Optionally, such as Figure 2C and Figure 3C As shown, the depth h1 of the thinning opening 1a of the adhesive segment 21 is less than the thickness of the adhesive layer 220. In order for the adhesive segment 21 to remain a double-sided adhesive after thinning, a certain thickness of the adhesive layer 220 needs to be retained. That is to say, the depth of the thinning opening 1a on the substrate layer 210 side cannot be greater than or equal to the thickness of the adhesive layer 220.

[0111] In some embodiments, the depth of the thinned opening 1a is less than or equal to half the thickness of the adhesive layer 220 on one side.

[0112] According to the second aspect of this application, such as Figure 5 As shown, a display terminal 2 is provided, including the backlight module 1 described above.

[0113] In this embodiment, as Figure 5 As shown, the display terminal 2 includes a backlight module 1 and a display panel 3, which are combined into one unit.

[0114] In some embodiments, the display panel 3 may be a non-self-emissive panel such as a liquid crystal panel.

[0115] In this embodiment, the display terminal 2 can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0116] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0117] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0118] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0119] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A backlight module, characterized in that, include: Backlit main body; Adhesive is used to bond the edge of the backlight body. The adhesive includes multiple adhesive segments. The ends of two adjacent adhesive segments overlap to form an overlapping portion. At least one of the adhesive segments and the backlight body has a thinning opening in the area corresponding to the overlapping portion. The area of ​​the thinning opening is greater than or equal to the area of ​​the overlapping portion.

2. The backlight module of claim 1, wherein, The plurality of adhesive segments include a first tape extending in a first direction and a second tape extending in a second direction, the first direction intersecting the second direction, the first tape and the second tape overlapping at their close ends to form the overlap, and at least one of the first tape and the second tape having the thinning opening in the region corresponding to the overlap.

3. The backlight module of claim 2, wherein, The first tape has the thinning opening on the side near the second tape, and the second tape has the thinning opening on the side near the first tape.

4. The backlight module of claim 2, wherein, The plurality of adhesive segments further include a third tape extending along the second direction, the third tape overlapping one end of the second tape to form another overlapping portion, the two overlapping portions being spaced apart in the second direction, and at least one of the second tape and the third tape having the thinning opening in the region corresponding to the other overlapping portion.

5. The backlight module of claim 4, wherein, Both the first tape and the third tape are disposed on the side of the second tape away from the backlight body. The first tape has the thinning opening on the side close to the second tape, and the third tape has the thinning opening on the side close to the second tape.

6. The backlight module of claim 5, wherein, The second tape does not have the aforementioned thinning opening.

7. The backlight module of claim 5, wherein, In the second direction, the distance between the two overlapping portions is less than the width of the third tape.

8. The backlight module of claim 1, wherein, The plurality of adhesive segments include a first tape extending in a first direction and a second tape extending in a second direction, wherein the first tape and the second tape overlap at their close ends to form the overlapping portion, and the backlight body has the thinning opening in the region corresponding to the overlapping portion, and the overlapping portion is received within the thinning opening.

9. The backlight module according to any one of claims 1 to 8, wherein, The adhesive segment includes a substrate layer and adhesive layers located on opposite sides of the substrate layer, wherein the depth of the thinning opening of the adhesive segment is less than the thickness of the adhesive layer.

10. A display terminal, characterized by Includes the backlight module as described in any one of claims 1 to 9.

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