Backlight module and display device

Abstract

The utility model relates to display device technical field discloses a backlight module and display device. Display device includes the backlight module, and the backlight module includes backplate, light guide plate and lamp strip subassembly, wherein backplate includes the bottom plate and side plate of vertical setting, and lamp strip subassembly includes flexible circuit board and a plurality of lamp pearl, and flexible circuit board extends along the first direction and is bonded on the side plate, and a plurality of lamp pearls are all installed on the flexible circuit board and set up opposite with the light -entry side of light guide plate, wherein one of backplate and flexible circuit board two, one sets up the insertion projection, the other sets up the slot, and the insertion projection is inserted with the slot and is along the first direction and limits lamp strip subassembly. The utility model discloses the backlight module, and the reliable fixation between lamp strip subassembly and backplate can avoid lamp strip subassembly to be damaged by light guide plate in the process of environmental test and offset.

Description

Technical Field

[0001] This utility model relates to the field of display equipment technology, and in particular to a backlight module and display device. Background Technology

[0002] Liquid crystal displays (LCDs) have advantages such as low operating voltage, light weight, and small size, and are widely used in home appliances, automobiles, and other fields. An LCD device includes a backlight module and a liquid crystal display panel. The backlight module provides a light source for the liquid crystal display panel, while the liquid crystal display panel uses changes in the electric field intensity applied to the liquid crystal molecules to change the orientation of the liquid crystal molecules, controlling the intensity of light transmission, thereby achieving image display.

[0003] Figure 1 A partial top view of the backlight module 10′ provided for the prior art, such as Figure 1 As shown, the backlight module 10' includes a back plate 11', a light strip assembly 13', and a light guide plate 12'. The back plate 11' includes a bottom plate 111' and a side plate 112'. The light strip assembly 13' extends along a first direction and includes a flexible circuit board 131' and a plurality of spaced-apart LED beads 132'. The flexible circuit board 131' is attached to the side plate 112' with double-sided adhesive. The light guide plate 12' is mounted on the bottom plate 111', and the light-incident side of the light guide plate 12' is opposite to the LED beads 132'. The end of the light guide plate 12' along the first direction is provided with a boss portion 121', which abuts against the flexible circuit board 131' to limit the position of the light guide plate 12' and ensure that there is a suitable gap between the light guide plate 12' and the LED beads 132'. However, during environmental testing of the backlight module 10′, the flexible circuit board 131′ will misalign along the first direction due to thermal expansion and contraction under changes in ambient temperature. The LED bead 132′ at the end will collide with the boss portion 121′, causing the LED bead 132′ to desolder from the flexible circuit board 131′, ultimately resulting in the LED strip assembly 13′ failing to light up.

[0004] Therefore, there is an urgent need for a backlight module and display device to solve the above-mentioned technical problems. Utility Model Content

[0005] One objective of this invention is to provide a backlight module in which the LED strip assembly is reliably fixed to the backplate, thereby preventing the LED strip assembly from shifting and being damaged by the light guide plate during environmental testing.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Backlight module, including:

[0008] A back panel, the back panel comprising a vertically arranged bottom plate and side plates;

[0009] A light guide plate, which is supported on the base plate;

[0010] A light strip assembly, the light strip assembly including a flexible circuit board and a plurality of lamp beads, the flexible circuit board extending along a first direction and adhered to the side plate, the plurality of lamp beads being mounted on the flexible circuit board and disposed opposite to the light-incident side of the light guide plate;

[0011] Of the backplate and the flexible circuit board, one is provided with a plug-in protrusion and the other is provided with a slot. The plug-in protrusion and the slot are plugged in and cooperate to limit the light strip assembly along the first direction.

[0012] As an optional solution, the mating gap between the insertion protrusion and the slot in the first direction is no greater than 0.2 mm.

[0013] As an alternative, the slot is located at one end of the flexible circuit board away from the base plate, and the side plate is provided with a recessed groove corresponding to the position of the slot. One end of the insertion protrusion is connected to the inner wall of the recessed groove, and the other end extends toward the light strip assembly to be inserted into the slot.

[0014] As an alternative, the flexible circuit board is embedded with a metal reinforcement arranged around the slot.

[0015] As an optional feature, the insertion protrusion includes:

[0016] A first insertion part is connected to the side plate and inserted into the slot;

[0017] A first support portion is connected to the end of the first insertion portion away from the side plate and extends in a direction away from the bottom plate. The first support portion is used to support the middle frame of the display device.

[0018] As an optional solution, the plug-in protrusion further includes a second support portion, which is connected to the first plug-in portion and / or the first support portion. The second support portion passes through the middle frame and is used to limit the display panel of the display device and / or support the front frame of the display device.

[0019] As an alternative, the slot is disposed on the base plate, the flexible circuit board includes a circuit board body and a plug-in protrusion, the circuit board body is bonded to the side plate, and the plug-in protrusion is disposed at one end of the flexible circuit board near the base plate.

[0020] As an optional solution, the backlight module also includes a reinforcing member, which is fitted onto one side of the insertion protrusion and configured to support and reinforce the insertion protrusion.

[0021] As an alternative, the insertion protrusion includes a second insertion portion and a bent portion. The second insertion portion is connected to the circuit board body and inserted into the slot. The bent portion is connected to the end of the second insertion portion away from the circuit board body and is bonded to the side of the back plate away from the light guide plate.

[0022] Another objective of this invention is to provide a display device that, by employing the aforementioned backlight module, can prevent the LED strip assembly from becoming misaligned or damaged during environmental testing.

[0023] To achieve this objective, the present invention adopts the following technical solution:

[0024] The display device includes a display panel and the backlight module, wherein the display panel is disposed on the side of the light guide plate opposite to the base plate.

[0025] The beneficial effects of this utility model are:

[0026] In this utility model, the flexible circuit board of the LED strip assembly is fixed to the side plate of the back panel by adhesive bonding, which makes assembly more convenient. At the same time, the back panel and the flexible circuit board are connected by the insertion protrusion and slot, which reliably mechanically limits the position of the LED strip assembly relative to the back panel in the first direction. Thus, when the back light module is subjected to environmental testing, it can avoid large positional movement in the first direction caused by repeated expansion and contraction of the flexible circuit board due to temperature changes. This also avoids interference between the LEDs at the ends and the light guide plate, ensuring the integrity of the LED strip assembly after environmental testing.

[0027] The display device of this invention, by employing the aforementioned backlight module, can prevent the LED strip assembly from becoming misaligned or damaged during environmental testing. Attached Figure Description

[0028] Figure 1 This is a top view of a backlight module provided by existing technology;

[0029] Figure 2 This is a schematic diagram of the structure of the backlight module and the middle frame provided in Embodiment 1 of this utility model;

[0030] Figure 3 yes Figure 2 Enlarged view of point A in the image;

[0031] Figure 4 This is a partial cross-sectional view of the backlight module and the middle frame when they are assembled, according to Embodiment 1 of this utility model;

[0032] Figure 5 This is a partial structural schematic diagram of the backlight module provided in Embodiment 1 of this utility model;

[0033] Figure 6 This is a schematic diagram of the backlight module provided in Embodiment 1 of this utility model at the lead-out portion of the flexible circuit board;

[0034] Figure 7 This is a partial structural schematic diagram of the backlight module provided in Embodiment 2 of this utility model;

[0035] Figure 8 yes Figure 7 Enlarged view of point B in the image;

[0036] Figure 9 This is a schematic diagram of the structure of the first type of insertion protrusion and back plate mating part provided in Embodiment 2 of this utility model;

[0037] Figure 10 This is a cross-sectional view of the first type of insertion protrusion and back plate mating part provided in Embodiment 2 of this utility model;

[0038] Figure 11 This is a schematic diagram of the structure of the second type of insertion protrusion and back plate mating part provided in Embodiment 2 of this utility model;

[0039] Figure 12 This is a cross-sectional view of the second type of insertion protrusion and back plate mating part provided in Embodiment 2 of this utility model.

[0040] In the picture:

[0041] 10′ Backlight module; 11′ Back plate; 111′ Bottom plate; 112′ Side plate; 12′ Light guide plate; 121′ Boss; 13′ LED strip assembly; 131′ Flexible circuit board; 132′ LED chip;

[0042] 10. Backlight module; 11. Back plate; 111. Base plate; 112. Side plate; 1121. Recessed groove; 113. Clearance hole; 12. Light guide plate; 121. Boss part; 13. LED strip assembly; 131. Flexible circuit board; 1311. Circuit board body; 1312. Lead-out part; 132. LED bead; 141. Insertion protrusion; 1411. Second insertion part; 1412. Bending part; 1413. First insertion part; 1414. First support part; 1415. Second support part; 142. Slot; 15. Reinforcing member; 16. Light-shielding tape; 17. Optical film;

[0043] 20. Middle frame; 21. Through hole;

[0044] 30. Panel fixing adhesive. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not the entire structure.

[0046] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0049] Example 1

[0050] This embodiment provides a backlight module and a display device. Figure 2 This is a schematic diagram of the structure of the backlight module and the middle frame provided in Embodiment 1 of this utility model. Figure 3 yes Figure 2 Enlarged view of point A in the image, as shown Figure 2 and Figure 3As shown, the display device includes a backlight module 10, a mid-frame 20, a front frame, and a display panel. The backlight module 10 provides a light source for the display panel. The mid-frame 20 is constructed as a ring frame and is supported on the backlight module 10. Optionally, the mid-frame 20 can be connected to the backlight module 10 by snap-fit. The display panel is adhered to the side of the mid-frame 20 away from the backlight module 10 by panel adhesive 30. The front frame is constructed as a ring frame and is supported on the mid-frame 20. The front frame covers the edge area of ​​the display panel. Optionally, the front frame can be connected to the mid-frame 20 by snap-fit. In this embodiment, the display panel can be a liquid crystal display panel.

[0051] Figure 4 This is a partial cross-sectional view of the backlight module and the mid-frame when they are assembled, according to Embodiment 1 of this utility model. Figure 5 This is a partial structural schematic diagram of the backlight module provided in Embodiment 1 of this utility model, as shown below. Figure 4 and Figure 5 As shown, the backlight module 10 includes a backplate 11, an LED strip assembly 13, a light guide plate 12, and an optical film 17. The backplate 11 includes a base plate 111 and a side plate 112, which are vertically arranged. The LED strip assembly 13 includes a flexible circuit board 131 and multiple LED beads 132. The flexible circuit board 131 extends along a first direction and is adhered to the side plate 112. The multiple LED beads 132 are spaced apart on the flexible circuit board 131 along the first direction. It is understood that each LED bead 132 is electrically connected to the circuitry within the flexible circuit board 131. Optionally, the flexible circuit board 131 can be adhered to the side plate 112 using double-sided adhesive, thereby improving the ease of connection between the LED strip assembly 13 and the backplate 11.

[0052] Figure 6 This is a schematic diagram of the backlight module provided in Embodiment 1 of this utility model at the lead-out portion of the flexible circuit board, as shown. Figure 5 and Figure 6As shown, the flexible circuit board 131 includes a circuit board body 1311 and a lead-out portion 1312, wherein the circuit board body 1311 is bonded to the side plate 112. The lead-out portion 1312 is connected to the circuit board body 1311 and is used for electrical connection with external circuitry. Specifically, a clearance hole 113 is provided at the intersection of the bottom plate 111 and the side plate 112. The lead-out portion 1312 passes through the clearance hole 113 to extend to the outside of the backlight module 10, thereby facilitating its electrical connection with external circuitry. In this embodiment, the cross-sectional area of ​​the clearance hole 113 is larger than the cross-sectional area of ​​the lead-out portion 1312, thereby avoiding contact wear between the lead-out portion 1312 and the back plate 11, ensuring the service life of the flexible circuit board 131. Optionally, the flexible circuit board 131 may be provided with two lead-out portions 1312, which are spaced apart along a first direction. It is understood that in this embodiment, two clearance holes 113 are also provided accordingly. Optionally, light-shielding tape 16 is adhered to the outside of the clearance hole 113 (see reference). Figure 2 This avoids light leakage from the backlight module 10 through the clearance hole 113. Optionally, the light-shielding tape 16 at the clearance hole 113 can be bonded to the middle frame 20 and the bottom plate 111 respectively.

[0053] like Figure 4 As shown, the light guide plate 12 and the optical film 17 are stacked sequentially on the base plate 111, with the light-incident side of the light guide plate 12 (i.e., one end face of the light guide plate 12) positioned opposite to the light strip assembly 13. Figure 5 As shown, in this embodiment, a protrusion 121 is provided at the end of the light guide plate 12 facing the light strip assembly 13 and located in the first direction. The protrusion 121 abuts against the flexible circuit board 131 of the light strip assembly 13. The abutment between the protrusion 121 and the flexible circuit board 131 can limit the position of the light guide plate 12 along the second direction, thereby ensuring a suitable gap between the light-incident side of the light guide plate 12 and the lamp bead 132. This avoids the light guide plate 12 and the lamp bead 132 being too far apart, which would affect the display effect, and also avoids the light guide plate 12 and the lamp bead 132 being too close and being burned by the heat generated by the lamp bead 132. In this embodiment, the first direction and the second direction are perpendicular to each other and both are parallel to the base plate 111.

[0054] In existing technologies, such as Figure 1 As shown, during environmental testing of the backlight module 10′, the flexible circuit board 131′ will misalign along the first direction due to thermal expansion and contraction under changes in ambient temperature. The LED bead 132′ at the end will collide with the boss 121′, causing the LED bead 132′ to desolder from the flexible circuit board 131′, ultimately resulting in the LED strip assembly 13′ failing to light up.

[0055] In this regard, such as Figure 4 and Figure 5As shown, of the backplate 11 and the flexible circuit board 131, one is provided with a plug-in protrusion 141, and the other is provided with a slot 142. The plug-in protrusion 141 and the slot 142 are plugged in and engage to limit the position of the light strip assembly 13 along the first direction. In this embodiment, the plug-in engagement between the backplate 11 and the flexible circuit board 131 through the plug-in protrusion 141 and the slot 142 reliably mechanically limits the position of the light strip assembly 13 relative to the backplate 11 along the first direction. This prevents the flexible circuit board 131 from shifting significantly in the first direction due to repeated expansion and contraction caused by temperature changes during environmental testing of the backlight module 10. Consequently, it prevents interference between the LED beads 132 at the ends and the light guide plate 12, ensuring the integrity of the light strip assembly 13 after environmental testing.

[0056] In this embodiment, the mating gap between the insertion protrusion 141 and the slot 142 in the first direction is no greater than 0.2 mm. This configuration ensures smooth assembly of the insertion protrusion 141 and the slot 142 while limiting the positional movement of the flexible circuit board 131 in the first direction to a sufficiently small range, thereby preventing the end LED beads 132 from being damaged by the protrusion 121 of the light guide plate 12. Optionally, in this embodiment, the mating gap between the insertion protrusion 141 and the slot 142 in the first direction is 0.2 mm. In other embodiments, the mating gap between the insertion protrusion 141 and the slot 142 in the first direction can also be 0.05 mm, 0.1 mm, 0.15 mm, etc., and is not specifically limited here.

[0057] like Figure 4 and Figure 5 As shown, slot 142 is disposed at one end of flexible circuit board 131 away from base plate 111. Side plate 112 is provided with recess 1121 corresponding to the position of slot 142. One end of insertion protrusion 141 is connected to the inner wall of recess 1121, and the other end extends toward the light strip assembly 13 to be inserted into slot 142, thereby reliably mechanically limiting the light strip assembly 13 along the first direction. In this embodiment, at least two slots 142 are provided on flexible circuit board 131 along the first direction. Correspondingly, at least two insertion protrusions 141 are provided on side plate 112, and each insertion protrusion 141 is inserted into one slot 142. The cooperation of at least two sets of slots 142 and insertion protrusions 141 makes the position of light strip assembly 13 along the first direction more reliable. Optionally, insertion protrusion 141 is connected to the bottom wall of slot 142 (i.e., parallel to the inner wall of base plate 111). Optionally, the base plate 111, side plate 112 and plug-in protrusion 141 are formed by bending a single sheet metal piece, which not only facilitates forming but also ensures reliable positioning of the light strip assembly 13.

[0058] The slot 142 on the flexible circuit board 131 can affect the structural strength of the flexible circuit board 131 at the corresponding location. Therefore, in this embodiment, a metal reinforcing member is embedded within the flexible circuit board 131, arranged around the slot 142. By embedding the metal reinforcing member within the flexible circuit board 131, the structural strength of the slot 142 area can be compensated, preventing tearing or damage to the flexible circuit board 131 near the slot 142. Optionally, the metal reinforcing member can be copper wire. In other embodiments, the specific material of the metal reinforcing member is not limited. Optionally, the slot 142 is U-shaped, and the corresponding metal reinforcing member is also U-shaped, or it can be arranged only at the corner of the U-shaped slot 142; no specific limitation is made here. It is understood that the metal reinforcing member can be integrally formed as an insert during the manufacturing process of the flexible circuit board 131.

[0059] In some cases, the dimensions of the middle frame 20 along the second direction are relatively large, making it prone to deformation. This, in turn, reduces the installation accuracy of the display panel supported by the middle frame 20. To address this, for example... Figure 4 and Figure 5 As shown, the insertion protrusion 141 includes a first insertion portion 1413 and a first support portion 1414. The first insertion portion 1413 is connected to the side plate 112 and inserted into the slot 142. The first support portion 1414 is connected to the end of the first insertion portion 1413 away from the side plate 112 and extends in a direction away from the bottom plate 111. The first support portion 1414 is used to support the middle frame 20, thereby preventing deformation of the middle frame 20, ensuring the installation accuracy of the display panel, and improving the structural strength of the entire display device. In this embodiment, as... Figure 5 As shown, the first support portion 1414 is flat and is arranged parallel to the side plate 112. In this embodiment, the first support portion 1414 supports the middle frame 20 on the end face parallel to the bottom plate 111. In some embodiments (not shown), the first support portion 1414 includes a vertical plate and a horizontal plate, wherein the vertical plate is arranged parallel to the side plate 112 and one end is connected to the side of the first insertion portion 1413 away from the side plate 112, and the horizontal plate is arranged parallel to the bottom plate 111 and is connected to the end of the vertical plate away from the bottom plate 111. In this embodiment, the horizontal plate supports the middle frame 20.

[0060] like Figure 4 and Figure 5As shown, the middle frame 20 is provided with a through hole 21, and the insertion protrusion 141 also includes a second support portion 1415. The second support portion 1415 is connected to the first insertion portion 1413 and / or the first support portion 1414, and the second support portion 1415 passes through the through hole 21 on the middle frame 20. On the one hand, the second support portion 1415 can limit the display panel along the second direction to prevent the display surface from shifting along the first direction; on the other hand, the second support portion 1415 is also used to support the front frame of the display device to prevent the front frame from deforming and collapsing, thereby improving the structural strength of the display device. In this embodiment, the second support portion 1415 is a plate parallel to the side plate 112, with one end connected to the first support portion 1414 and the other end extending in a direction away from the bottom plate 111 to pass through the through hole 21. In other embodiments, the second support portion 1415 may also be configured to be directly connected to the first insertion portion 1413, which is not limited here. The backlight module and display device disclosed in this embodiment are reliably fixed between the light strip assembly and the back plate, which can prevent the light strip assembly from shifting and being damaged by the light guide plate during environmental testing.

[0061] Example 2

[0062] This embodiment provides a backlight module 10 and a display device, the display device including the backlight module 10. In this embodiment, the general structure of the backlight module 10 is the same as in Embodiment 1, and the similarities will not be repeated here. The main difference lies in the arrangement of the insertion protrusion 141 and the slot 142, as detailed below:

[0063] Figure 7 This is a partial structural schematic diagram of the backlight module provided in Embodiment 2 of this utility model; Figure 8 yes Figure 7 Enlarged view of point B in the image; Figure 9 This is a schematic diagram of the structure of the first type of insertion protrusion and back plate mating part provided in Embodiment 2 of this utility model; Figure 10 This is a cross-sectional view of the first type of insertion protrusion and back plate mating part provided in Embodiment 2 of this utility model; as shown Figures 7-10 As shown, slot 142 is disposed on base plate 111 and located at the intersection of base plate 111 and side plate 112. Flexible circuit board 131 includes circuit board body 1311, lead-out portion 1312 and insertion protrusion 141. Circuit board body 1311 is bonded to side plate 112, lead-out portion 1312 is connected to circuit board body 1311 and extends from clearance hole 113 on back plate 11 to the outside of backlight module 10 for electrical connection with external circuitry. Insertion protrusion 141 is disposed at one end of flexible circuit board 131 near base plate 111 for insertion and engagement with slot 142, thereby reliably limiting the position of light strip assembly 13 along the first direction.

[0064] Optionally, in this embodiment, at least two slots 142 are provided on the base plate 111 along the first direction, and the flexible circuit board 131 includes at least two insertion protrusions 141, each insertion protrusion 141 corresponding to one slot 142. The cooperation between the two sets of slots 142 and the insertion protrusions 141 further improves the reliability of limiting the lamp strip assembly 13 along the first direction. Since the cooperation between the insertion protrusions 141 and the slots 142 is inevitably subject to wear, no circuit is provided on the insertion protrusions 141 in this embodiment.

[0065] like Figure 9 and Figure 10 As shown, the backlight module 10 also includes a reinforcing member 15, which is fitted to one side of the insertion protrusion 141. The reinforcing member 15 can support and strengthen the insertion protrusion 141, thereby preventing the insertion protrusion 141 from deforming when the flexible circuit board 131 has a tendency to move along the first direction, ensuring the reliability of the engagement between the insertion protrusion 141 and the slot 142, and thus ensuring the reliability of limiting the position of the light strip assembly 13 along the first direction.

[0066] Optionally, in this embodiment, the reinforcing member 15 is disposed on the side of the insertion protrusion 141 facing away from the light guide plate 12. This arrangement avoids the reinforcing member 15 from adversely affecting the propagation of light. Of course, in other embodiments, the reinforcing member 15 can also be disposed on the side of the insertion protrusion 141 facing the light guide plate 12. Optionally, the reinforcing member 15 can be connected to the insertion protrusion 141 by welding or bonding. Optionally, the material of the reinforcing member 15 can be metal, rigid plastic, etc., and is not limited thereto. Figure 10 As shown, the backlight module 10 has a light-shielding tape 16 at the slot 142. The light-shielding tape 16 at the slot 142 is L-shaped and is bonded to the bottom plate 111 and the side plate 112 respectively. The light-shielding tape 16 is used to seal the slot 142, thereby avoiding the problem of light leakage of the backlight module 10 at the slot 142.

[0067] Figure 11 This is a schematic diagram of the structure of the second type of insertion protrusion and back plate mating part provided in Embodiment 2 of this utility model; Figure 12 This is a cross-sectional view of the second type of insertion protrusion and back plate mating part provided in Embodiment 2 of this utility model; as shown Figure 11 and Figure 12As shown, the insertion protrusion 141 includes a second insertion portion 1411 and a bent portion 1412. The second insertion portion 1411 is connected to the circuit board body 1311 and inserted into the slot 142. The bent portion 1412 is connected to the end of the second insertion portion 1411 away from the circuit board body 1311 and is bonded to the side of the back plate 11 opposite to the light guide plate 12. By setting the bent portion 1412 to be bonded to the base plate 111, the reliability of the connection between the LED strip assembly 13 and the back plate 11 can be improved, and the risk of the LED strip assembly 13 shifting along the first direction can be reduced. It should be noted that in this embodiment, a light-shielding tape 16 is also provided at the slot 142, and the light-shielding tape 16 covers the bent portion 1412. The backlight module and display device disclosed in this embodiment have a reliable fixation between the LED strip assembly and the back plate, which can prevent the LED strip assembly from shifting and being damaged by the light guide plate during environmental testing.

[0068] Example 3

[0069] This embodiment provides a backlight module and a display device, the display device including the backlight module. In this embodiment, the bottom plate of the back panel is provided with a first slot, and the flexible circuit board includes a first insertion protrusion. The specific structure is described in the structural description of Embodiment 1, and the similarities will not be repeated here. In addition, the flexible circuit board is provided with a second slot at the end away from the bottom plate, and the side plate is provided with a recess and a second insertion protrusion corresponding to the position of the second slot. The specific structure is described in the structural description of Embodiment 2, and the similarities will not be repeated here.

[0070] The backlight module and display device disclosed in this embodiment are reliably fixed between the light strip assembly and the back plate, which can prevent the light strip assembly from shifting and being damaged by the light guide plate during environmental testing.

[0071] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. For those skilled in the art, based on the concept of this utility model, there will be changes in the specific implementation methods and application scope. The content of this specification should not be construed as a limitation of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A backlight module, characterized in that, include: The back plate (11) includes a bottom plate (111) and a side plate (112) arranged vertically. A light guide plate (12) is supported on the base plate (111); The light strip assembly (13) includes a flexible circuit board (131) and a plurality of lamp beads (132). The flexible circuit board (131) extends along a first direction and is bonded to the side plate (112). The plurality of lamp beads (132) are mounted on the flexible circuit board (131) and are disposed opposite to the light-incident side of the light guide plate (12). Of the back plate (11) and the flexible circuit board (131), one is provided with a plug-in protrusion (141) and the other is provided with a slot (142). The plug-in protrusion (141) and the slot (142) are plugged in and cooperate with each other and limit the light strip assembly (13) along the first direction.

2. The backlight module as described in claim 1, characterized in that, The mating gap between the insertion protrusion (141) and the slot (142) in the first direction is no greater than 0.2 mm.

3. The backlight module as described in claim 1 or 2, characterized in that, The slot (142) is located at one end of the flexible circuit board (131) away from the base plate (111). The side plate (112) is provided with a recess (1121) corresponding to the position of the slot (142). One end of the insertion protrusion (141) is connected to the inner wall of the recess (1121), and the other end extends toward the light strip assembly (13) to be inserted into the slot (142).

4. The backlight module as described in claim 3, characterized in that, The flexible circuit board (131) is embedded with a metal reinforcement, which is arranged around the slot (142).

5. The backlight module as described in claim 3, characterized in that, The insertion protrusion (141) includes: The first plug-in part (1413) is connected to the side plate (112) and plugged into the slot (142); The first support portion (1414) is connected to the end of the first plug portion (1413) away from the side plate (112) and extends in a direction away from the bottom plate (111). The first support portion (1414) is used to support the middle frame (20) of the display device.

6. The backlight module as described in claim 5, characterized in that, The insertion protrusion (141) further includes a second support portion (1415), which is connected to the first insertion portion (1413) and / or the first support portion (1414). The second support portion (1415) passes through the middle frame (20) and is used to limit the display panel of the display device and / or support the front frame of the display device.

7. The backlight module as described in claim 1 or 2, characterized in that, The slot (142) is disposed on the base plate (111). The flexible circuit board (131) includes a circuit board body (1311) and a plug-in protrusion (141). The circuit board body (1311) is bonded to the side plate (112). The plug-in protrusion (141) is disposed at one end of the flexible circuit board (131) near the base plate (111).

8. The backlight module as described in claim 7, characterized in that, The backlight module also includes a reinforcing member (15), which is fitted to one side of the insertion protrusion (141) and is configured to support and reinforce the insertion protrusion (141).

9. The backlight module as described in claim 7, characterized in that, The insertion protrusion (141) includes a second insertion portion (1411) and a bent portion (1412). The second insertion portion (1411) is connected to the circuit board body (1311) and inserted into the slot (142). The bent portion (1412) is connected to the end of the second insertion portion (1411) away from the circuit board body (1311) and is bonded to the side of the back plate (11) away from the light guide plate (12).

10. A display device, characterized in that, Includes a display panel and a backlight module as described in any one of claims 1-9, wherein the display panel is disposed on the side of the light guide plate (12) opposite to the base plate (111).

Images