Backlight module

Abstract

The application discloses a backlight module, which comprises a back plate and a middle frame. The middle frame is arranged on the back plate. The back plate comprises a bottom plate and a side plate. The side plate is connected with the bottom plate to form an accommodating cavity. The connecting part of the side plate and the bottom plate forms a bending part. Part of the bending part protrudes towards the inner side of the accommodating cavity to form a first protruding part. A plurality of first protruding parts are arranged on the side plate. A plurality of glue injection holes are arranged on the side away from the bottom plate of the side plate. The glue injection holes are arranged above at least one first protruding part. The backlight module can improve the problem of edge light leakage.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a backlight module. Background Technology

[0002] To achieve narrow bezels, ultra-thin designs, and high strength in displays such as smartphones, tablets, and laptops, the backlight module of these devices utilizes a unibody injection-molded structure. A typical backlight module consists of a backplate and a mid-frame. The backplate comprises a base plate and side plates, with the side plates formed by bending a portion of the base plate. Injection holes are located at the bends between the side and base plates. During backlight module manufacturing, adhesive is injected through these holes towards the inside of the backplate, ensuring a unibody injection-molded structure between the mid-frame and backplate. However, the injection holes at the bends reduce the strength of the backplate, causing deformation and resulting in light leakage at the edges of the backlight module. Utility Model Content

[0003] Embodiments of this application provide a backlight module to improve the problem of edge light leakage in a backlight module.

[0004] An embodiment of this application provides a backlight module, including a back panel and a mid-frame, wherein the mid-frame is disposed on the back panel, and the back panel includes: Base plate; A side plate is connected to the bottom plate to form a receiving cavity, and a bend is formed at the connection between the side plate and the bottom plate. A portion of the bend protrudes toward the inside of the receiving cavity to form a plurality of first protrusions on the inside of the receiving cavity. A plurality of glue injection holes are provided on the side of the side plate away from the bottom plate, and the glue injection holes are located above at least one of the first protrusions.

[0005] Furthermore, each of the injection holes is located above one of the first protrusions.

[0006] Furthermore, each of the injection holes is located above at least two of the first protrusions, and adjacent first protrusions are spaced apart along the length of the side plate.

[0007] Furthermore, the distance from the first protrusion to the edge of the injection hole is not less than 30mm.

[0008] Furthermore, the first protrusion includes a first sub-part and a second sub-part, the first sub-part being located on the side plate, the second sub-part being located on the bottom plate, and the second sub-part being connected to the first sub-part.

[0009] Furthermore, the distance from the edge of the first sub-part away from the base plate to the base plate is equal to the distance from the edge of the second sub-part away from the side plate to the side plate.

[0010] Furthermore, the distance from the edge of the first sub-part away from the base plate to the base plate is less than the distance from the edge of the second sub-part away from the side plate to the side plate.

[0011] Furthermore, the distance from the edge of the first sub-part near the injection hole to the base plate is no greater than 0.5 mm.

[0012] Furthermore, a portion of the bent portion protrudes toward the inside of the receiving cavity to form a plurality of second protrusions on the inside of the receiving cavity. The plurality of second protrusions are located between two adjacent injection holes and are spaced apart.

[0013] Furthermore, the second protrusion has the same shape and the same area as the first protrusion.

[0014] The beneficial effects of this application are: This application provides a backlight module in which a portion of the bent portion protrudes towards the inside of the receiving cavity to form a plurality of first protrusions on the inside of the receiving cavity. A plurality of injection holes are provided on the side plate away from the bottom plate, and the injection holes are located above at least one of the first protrusions. Compared to conventional backlight modules where the injection holes are located at the bent portion of the back plate, this design ensures the integrity of the material at the bent portion of the backlight module's back plate, as the injection holes are located on the side plate away from the bottom plate. Furthermore, the first protrusions located at the bent portion increase the moment of inertia of the back plate's cross-section, thereby increasing the back plate's strength, reducing the risk of deformation, and improving the edge light leakage problem of the backlight module. Attached Figure Description

[0015] Figure 1 This is a perspective view of the first structure of the backlight module of this application; Figure 2 yes Figure 1 An enlarged view of position A of the backlight module shown; Figure 3 yes Figure 1 A schematic diagram of the structure of the backplate of the backlight module shown; Figure 4 yes Figure 3 An enlarged view of position B of the backlight module shown; Figure 5 This is a side view of the first structure of the backlight module of this application; Figure 6 yes Figure 5 A cross-sectional view of the backlight module at EE' shown; Figure 7 yes Figure 5A cross-sectional view of the backlight module at FF' shown; Figure 8 This is a side view of a second structure of the backlight module in this application; Figure 9 This is a schematic diagram of the structure of the backplate of the backlight module of this application; Figure 10 This is a perspective view of the third structure of the backlight module of this application; Figure 11 yes Figure 10 An enlarged view of position C of the backlight module shown; Figure 12 yes Figure 10 A schematic diagram of the structure of the backplate of the backlight module shown; Figure 13 yes Figure 12 An enlarged view of position D of the backlight module shown.

[0016] Explanation of reference numerals in the attached figures: 100 - Back panel; 110 - Bottom panel; 120 - Side panel; 130 - Receiving cavity; 140 - Bending part; 141 - First protrusion; 1411 - First sub-part; 1412 - Second sub-part; 142 - Second protrusion; 1421 - Third sub-part; 1422 - Fourth sub-part; 143 - First groove; 1431 - First sub-groove; 1432 - Second sub-groove; 144 - Second groove; 1441 - Third sub-groove; 1442 - Fourth sub-groove; 150 - Injection hole; 200 - Middle frame. Detailed Implementation

[0017] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings. The technical solutions described below are for illustrative purposes only and should not be construed as limiting the scope of protection of this application.

[0018] Furthermore, the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different technical features. The terms "multiple" and similar words indicate two or more unless otherwise expressly specified.

[0019] The first embodiment of this application provides a first type of backlight module, see reference. Figure 3 , Figure 4 , Figure 6 , Figure 7 , Figure 9The backlight module includes a back plate 100 and a middle frame 200. The middle frame 200 is disposed on the back plate 100. The back plate 100 includes a bottom plate 110 and a side plate 120. The side plate 120 and the bottom plate 110 are connected to form a receiving cavity 130. A bending portion 140 is formed at the connection between the side plate 120 and the bottom plate 110. A portion of the bending portion 140 protrudes toward the inside of the receiving cavity 130 to form a plurality of first protrusions 141 on the inside of the receiving cavity 130. A plurality of glue injection holes 150 are provided on the side of the side plate 120 away from the bottom plate 110. The glue injection holes are located above one of the first protrusions.

[0020] A typical backlight module for a display device includes a back panel and a mid-frame. The back panel includes a bottom plate and side plates. The side plates are formed by bending a portion of the back panel. Injection holes are provided at the bending points of the side plates and the bottom plate. During the manufacturing of the backlight module, glue is injected from the injection holes toward the inside of the back panel, ensuring that the mid-frame and the back panel form a one-piece injection-molded structure. However, the injection holes located at the bending points reduce the strength of the back panel, causing the back panel to deform and resulting in light leakage at the edges of the backlight module. Therefore, the technical solution of this application provides a backlight module, which forms a plurality of first protrusions 141 on the inner side of the cavity 130 by protruding a portion of the bent portion 140 toward the inner side of the cavity 130. A plurality of injection holes 150 are provided on the side plate 120 away from the bottom plate 110, and each injection hole is located above a first protrusion. Compared with the conventional backlight module where the injection holes 150 are located at the bent portion 140 of the back plate 100, on the one hand, since the injection holes 150 are located on the side plate 120 away from the bottom plate 110, the integrity of the material at the bent portion 140 of the backlight module can be guaranteed. On the other hand, the first protrusions 141 located at the bent portion 140 can increase the moment of inertia of the back plate 100, thereby increasing the strength of the back plate 100, reducing the risk of deformation of the back plate 100, and improving the problem of edge light leakage of the backlight module.

[0021] In this embodiment, reference Figure 5 The distance 'a' from the first protrusion 141 to the edge of the injection hole 150 is not less than 30 mm. By setting the distance 'a' from the first protrusion 141 to the edge of the injection hole 150 to be not less than 30 mm, interference between the first protrusion 141 and the injection hole can be avoided, reducing the difficulty of the backlight module manufacturing process. Preferably, the distance 'a' from the first protrusion 141 to the edge of the injection hole 150 is 30 mm, 31 mm, 32 mm, 33 mm, 34 mm, 35 mm, 36 mm, 37 mm, 38 mm, 39 mm, or 40 mm.

[0022] In this embodiment, reference Figure 4 The first protrusion 141 includes a first sub-part 1411 and a second sub-part 1412. The first sub-part 1411 is located on the side plate 120, and the second sub-part 1412 is located on the bottom plate 110, and the second sub-part 1412 is connected to the first sub-part 1411. By setting the first protrusion 141 to include a first sub-part 1411 and a second sub-part 1412, with the first sub-part 1411 located on the side plate 120 and the second sub-part 1412 located on the bottom plate 110, and the second sub-part 1412 connected to the first sub-part 1411, the combination of the first sub-part 1411 and the second sub-part 1412 can improve the strength of the bending portion 140, thereby reducing the risk of deformation of the back plate 100 and improving the edge light leakage problem of the backlight module.

[0023] In this embodiment, reference Figure 1 The bent portion 140 has a plurality of first grooves 143 formed therein, each first groove 143 corresponding to each first protrusion 141.

[0024] It is understood that when a portion of the bent portion 140 protrudes toward the inside of the receiving cavity 130 to form a first protrusion 141 on the inside of the receiving cavity 130, a first groove 143 is formed on the outer side wall of the back plate 100.

[0025] In this embodiment, reference Figure 2 The first groove 143 includes a first sub-groove 1431 and a second sub-groove 1432. The first sub-groove 1431 is located on the side plate 120, and the second sub-groove 1432 is located on the bottom plate 110, and the second sub-groove 1432 is connected to the first sub-groove 1431.

[0026] In this embodiment, reference Figure 4 The distance from the edge of the first sub-part 1411 on the side away from the base plate 110 to the base plate 110 is equal to the distance from the edge of the second sub-part 1412 on the side away from the side plate 120 to the side plate 120. By setting the distance from the edge of the first sub-part 1411 on the side plate 110 to the base plate 110 to the base plate 110 to the side plate 120, that is, the length of the first sub-part 1411 on the side plate 120 is the same as the length of the second sub-part 1412 on the base plate 110, the equal length of the first sub-part 1411 and the second sub-part 1412 is more conducive to improving the strength of the bending part 140 structure.

[0027] In this embodiment, the distance from the edge of the first sub-part 1411 away from the base plate 110 to the base plate 110 is less than the distance from the edge of the second sub-part 1412 away from the side plate 120 to the side plate 120. By setting the distance from the edge of the first sub-part 1411 away from the base plate 110 to ...

[0028] In this embodiment, reference Figure 5 The distance from the edge of the first sub-part 1411 near the glue injection hole 150 to the base plate 110 is no greater than 0.5 mm. Preferably, the distance from the edge of the first sub-part 1411 near the glue injection hole 150 to the base plate 110 is 0.31 mm, 0.32 mm, 0.33 mm, 0.34 mm, 0.35 mm, 0.36 mm, 0.37 mm, 0.38 mm, 0.39 mm, 0.40 mm, 0.41 mm, 0.42 mm, 0.43 mm, 0.44 mm, 0.45 mm, 0.46 mm, 0.47 mm, 0.48 mm, 0.49 mm, or 0.5 mm.

[0029] In this embodiment, the thickness of the first protrusion 141 is the same as the thickness of the side plate 120 and the bottom plate 110.

[0030] In this embodiment, reference Figure 12 , Figure 13A portion of the bent portion 140 protrudes toward the inside of the receiving cavity 130 to form a plurality of second protrusions 142 on the inside of the receiving cavity 130. The plurality of second protrusions 142 are located between two adjacent glue injection holes 150 and are spaced apart. By setting a portion of the bent portion 140 to protrude toward the inner side of the receiving cavity 130, a second protrusion 142 is formed on the inner side of the receiving cavity 130. Multiple second protrusions 142 are provided, located between two adjacent injection holes 150, and spaced apart. The second protrusion can enhance the strength of the bent portion 140 in the area outside the injection hole. Since the first protrusion 141 can enhance the strength of the bent portion 140 in the area below the injection hole, the second protrusion 142 can cooperate with the first protrusion 141 to enhance the overall strength of the bent portion 140 of the backplate 100, thereby effectively reducing the risk of deformation of the backplate 100 and improving the edge light leakage problem of the backlight module.

[0031] In this embodiment, reference Figure 13 The second protrusion 142 includes a third sub-part 1421 and a fourth sub-part 1422. The third sub-part 1421 is located on the side plate 120, and the fourth sub-part 1422 is located on the bottom plate 110, with the third sub-part 1421 and the fourth sub-part 1422 connected. By providing the second protrusion 142 with the third sub-part 1421 and the fourth sub-part 1422, the combination of the third sub-part 1421 and the fourth sub-part 1422 enhances the strength of the bending portion 140, thereby reducing the risk of deformation of the back plate 100 and improving the edge light leakage problem of the backlight module.

[0032] In this embodiment, reference Figure 10 , Figure 11 A plurality of second grooves 144 are formed at the bending portion 140, and each second groove 144 corresponds to each second protrusion 142.

[0033] It is understood that when a portion of the bent portion 140 protrudes toward the inside of the receiving cavity 130 to form a second protrusion 142 inside the receiving cavity 130, a second groove 144 is formed on the outer side wall of the back plate 100.

[0034] In this embodiment, reference Figure 11The second groove 144 includes a third sub-groove 1441 and a fourth sub-groove 1442. The third sub-groove 1441 is located on the side plate 120, and the fourth sub-groove 1442 is located on the bottom plate 110. The third sub-groove 1441 and the fourth sub-groove 1442 are connected.

[0035] In this embodiment, the second protrusion 142 has the same shape and area as the first protrusion 141. By setting the second protrusion 142 and the first protrusion 141 to have the same shape and area, the same equipment can be used to manufacture both the second protrusion 142 and the first protrusion 141 simultaneously, thereby reducing the manufacturing difficulty of the backlight module.

[0036] In this embodiment, reference Figure 5 The length c of the injection hole is no greater than 10mm, and the depth d of the injection hole is no greater than 1mm. Preferably, the length c of the injection hole is 8.1mm, 8.2mm, 8.3mm, 8.4mm, 8.5mm, 8.6mm, 8.7mm, 8.8mm, 8.9mm, 9.0mm, 9.1mm, 9.2mm, 9.3mm, 9.4mm, 9.5mm, 9.6mm, 9.7mm, 9.8mm, 9.9mm, or 10mm, and the depth d of the injection hole is 0.8mm, 0.81mm, 0.82mm, 0.83mm, 0.84mm, 0.85mm, 0.86mm, 0.87mm, 0.88mm, 0.89mm, 0.90mm, 0.91mm, 0.92mm, 0.93mm, 0.94mm, 0.95mm, 0.96mm, 0.97mm, 0.98mm, or 1mm.

[0037] The second embodiment of this application provides a second backlight module. The second embodiment is similar to the first embodiment, but differs from the first embodiment in that, in reference to... Figure 8 Each of the glue injection holes 150 is provided above at least two of the first protrusions 141, and adjacent first protrusions 141 are spaced apart in the length direction of the side plate 120.

[0038] A typical backlight module for a display device includes a back panel and a mid-frame. The back panel includes a bottom plate and side plates. The side plates are formed by bending a portion of the back panel. Injection holes are provided at the bending points of the side plates and the bottom plate. During the manufacturing of the backlight module, glue is injected from the injection holes toward the inside of the back panel, ensuring that the mid-frame and the back panel form a one-piece injection-molded structure. However, the injection holes located at the bending points reduce the strength of the back panel, causing the back panel to deform and resulting in light leakage at the edges of the backlight module. Therefore, the technical solution of this application provides a backlight module, which forms a plurality of first protrusions 141 on the inner side of the receiving cavity 130 by protruding a portion of the bent portion 140 toward the inner side of the receiving cavity 130. A plurality of injection holes 150 are provided on the side plate 120 away from the bottom plate 110. Each injection hole 150 is located above at least two of the first protrusions 141. Adjacent first protrusions 141 are spaced apart along the length of the side plate 120. Compared to the conventional backlight module solution where the injection holes 150 are located at the bent portion 140 of the back plate 100, this solution offers advantages in that the injection holes 150 are located on the side plate 120. The side away from the base plate 110 ensures the integrity of the material at the bending portion 140 of the backlight module's backplate 100. On the other hand, the first protrusion 141 located at the bending portion 140 can increase the moment of inertia of the backplate 100's cross section, thereby increasing the strength of the backplate 100, reducing the risk of deformation of the backplate 100, and improving the problem of edge light leakage of the backlight module. Furthermore, since the two adjacent first protrusions 141 are spaced apart, the spaced first protrusions 141 can effectively improve the overall strength of the bending portion 140 in each area below the injection hole 150, thereby further reducing the risk of deformation of the backplate 100 and effectively improving the problem of edge light leakage of the backlight module.

[0039] In this embodiment, the number of the first protrusions 141 provided below each of the glue injection holes 150 is 2, 3, 4 or 5.

[0040] It should be understood that, unless otherwise specified or there is a logical conflict, the terminology and / or descriptions between different embodiments are consistent and can be referenced by each other, and the technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0041] The specific embodiments of this application have been described in detail above. The embodiments disclosed above are merely preferred embodiments of this application. Those skilled in the art can make many modifications and improvements without departing from the concept of this application. All such modifications and improvements fall within the scope of protection defined by the claims of this application.

Claims

1. A backlight module, characterized in that, Includes a back panel and a middle frame, wherein the middle frame is disposed on the back panel, and the back panel includes: Base plate; A side plate is connected to the bottom plate to form a receiving cavity, and a bend is formed at the connection between the side plate and the bottom plate. A portion of the bend protrudes toward the inside of the receiving cavity to form a plurality of first protrusions on the inside of the receiving cavity. A plurality of glue injection holes are provided on the side of the side plate away from the bottom plate, and the glue injection holes are located above at least one of the first protrusions.

2. The backlight module according to claim 1, characterized in that, Each of the injection holes is located above one of the first protrusions.

3. The backlight module according to claim 1, characterized in that, Each of the injection holes is located above at least two of the first protrusions, and adjacent first protrusions are spaced apart along the length of the side plate.

4. The backlight module according to claim 1, characterized in that, The distance from the first protrusion to the edge of the injection hole is not less than 30mm.

5. The backlight module according to claim 1, characterized in that, The first protrusion includes a first sub-part and a second sub-part, the first sub-part being located on the side plate and the second sub-part being located on the bottom plate, and the second sub-part being connected to the first sub-part.

6. The backlight module according to claim 5, characterized in that, The distance from the edge of the first sub-part away from the base plate to the base plate is equal to the distance from the edge of the second sub-part away from the side plate to the side plate.

7. The backlight module according to claim 5, characterized in that, The distance from the edge of the first sub-part away from the base plate to the base plate is less than the distance from the edge of the second sub-part away from the side plate to the side plate.

8. The backlight module according to claim 5, characterized in that, The distance from the edge of the first sub-part near the injection hole to the base plate is no more than 0.5 mm.

9. The backlight module according to claim 1, characterized in that, A portion of the bent portion protrudes toward the inside of the receiving cavity to form a plurality of second protrusions on the inside of the receiving cavity. The plurality of second protrusions are located between two adjacent injection holes and are spaced apart.

10. The backlight module according to claim 9, characterized in that, The second protrusion has the same shape and area as the first protrusion.

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