Backlight module and display device

Abstract

The invention relates to a backlight module and a display device. The backlight module comprises a back plate and a light bar. The back plate comprises a bottom plate, and the light bar comprises a circuit board and a plurality of light-emitting devices; the circuit board comprises a main body part, and the light-emitting device is electrically connected with the main body part; the main body part is fixedly connected with the bottom plate in the thickness direction of the bottom plate. The backlight module with a narrow frame or an ultra-narrow frame can be obtained, and the narrow-frame or ultra-narrow-frame design can be achieved for the display device applying the backlight module.

Description

Technical Field

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

[0002] With the development of technology and the improvement of consumers' appearance requirements, ultra-narrow bezel and ultra-thin LCD display modules have become a development trend. Figure 1 As shown, the backlight module 1' of a conventional liquid crystal display includes a back panel 2', an LED light bar 3', a light bar connector 14', a reflective sheet 40', a light guide plate 4', an optical film group 41' and a front frame 36'. An LED light bar 3' is placed on an inner side of the back panel 2' as a light source, and the LED light bar 3' is fixed on the side wall of the back panel 2'. An opening is provided at the bottom of the back panel 2', and the light bar connector 14' is connected to the external terminal of the LED light bar 3' through the opening at the bottom of the back panel 2'. The front frame 36' is fixedly connected to the side wall of the back panel 2' by a snap. Due to the limitations of the thickness of the back panel 2', the front frame 36' and other components, the border of the liquid crystal display cannot be further reduced, and thus an ultra-narrow border liquid crystal display cannot be achieved.

[0003] Therefore, there is an urgent need to improve the structure of the backlight module of the liquid crystal display device to achieve an ultra-narrow frame design. Summary of the Invention

[0004] The embodiments of the present application provide a backlight module and a display device, which are conducive to obtaining a backlight module with a narrow frame or an ultra-narrow frame, so that the display device using the backlight module of the present application can achieve a narrow frame or an ultra-narrow frame design.

[0005] In order to achieve the above-mentioned object, according to a first aspect of the present application, a backlight module is provided, comprising:

[0006] Back plate, including bottom plate;

[0007] A light bar comprising a circuit board and a plurality of light emitting devices; the circuit board comprises a main body, and the light emitting devices are electrically connected to the main body;

[0008] Wherein, the main body is fixedly connected to the bottom plate along the thickness direction of the bottom plate.

[0009] Optionally, at least one first snap-fit structure is provided on the main body, and at least one first snap-fit groove is provided on the bottom plate, and the first snap-fit structure is snap-connected with the first snap-fit groove.

[0010] Optionally, at least one second snap-fit structure is provided on the main body, and at least one second snap-fit groove is provided on the base plate, and the second snap-fit structure is snap-connected with the second snap-fit groove; the light strip also includes a connector arranged on the side of the base plate away from the light-emitting device; wherein, the connector is electrically connected to the main body through the second snap-fit structure.

[0011] Optionally, the second snap-fit structure includes a second connecting portion and a second fixing portion, and the main body is snap-connected to the second card slot through the second connecting portion and the second fixing portion in sequence, and the second connecting portion is located in the second card slot; wherein, the second fixing portion is located on the side of the second card slot away from the main body, and the connector is electrically connected to the main body through the second fixing portion.

[0012] Optionally, the connector includes a third snap-fit structure and a connecting contact electrode, and the second fixed portion is provided with a third snap-fit slot and a fixed contact electrode; wherein the third snap-fit structure and the third snap-fit slot are snap-connected, and the connecting contact electrode and the fixed contact electrode are electrically connected.

[0013] Optionally, an extension direction of the third buckle structure and an extension direction of the second buckle structure intersect with each other.

[0014] Optionally, the connector further includes a shell, and the third snap-fit structure and the connection contact electrode are mounted on the shell; wherein the third snap-fit structure protrudes beyond the connection contact electrode in an extension direction of the third snap-fit structure.

[0015] Optionally, a first recess is provided on the shell, and a boss is provided at the bottom of the first recess; wherein the connection contact electrode is located in the first recess, and the third snap-fit structure is connected to the boss.

[0016] Optionally, the circuit board further includes a bending portion connected to the main body portion in a bending manner, and the bending portion is fixedly connected to the bottom plate along a thickness direction of the bottom plate.

[0017] Optionally, at least one fourth snap-fit structure is provided on the bending portion, and at least one fourth snap-fit slot is provided on the bottom plate; the fourth snap-fit structure is snap-connected with the fourth snap-fit slot.

[0018] Optionally, in the extension direction of the bending portion, the length of the bending portion is less than the length of the base plate; the back plate also includes a side plate bently connected to the base plate; wherein the side plate is arranged adjacent to the bending portion and is configured to jointly support the display panel.

[0019] Optionally, in the extension direction of the main body, the length of the main body is equal to the length of the bottom plate; wherein the main body is configured to support the display panel.

[0020] Optionally, the backlight module further includes a front frame; wherein the front frame is fixedly connected to the circuit board, so that the circuit board is configured to support the display panel through the front frame.

[0021] Optionally, the front frame is arranged opposite to the base plate and extends to the side of the circuit board facing away from the light-emitting device; wherein, the material of the front frame is selected from metal material, and the side of the circuit board facing away from the light-emitting device is fixedly connected to the front frame by a thermal conductive tape.

[0022] According to a second aspect of the present application, a display device is provided, comprising a display panel and the backlight module described above; the display panel is arranged on the light-emitting side of the backlight module.

[0023] In the backlight module and display device of the embodiment of the present application, when assembling the backlight module, the main body of the circuit board of the light bar can be directly fixedly connected to the bottom plate of the back plate along the thickness direction of the bottom plate, so that the main body of the light bar is vertically fixed to the bottom plate of the back plate. On the one hand, it is possible to avoid providing a snap-on structure or adhesive layer on the inner or outer side of the circuit board of the light bar to achieve a fixed connection with the side plate or front frame of the back plate, which is beneficial to reducing the border width on the side where the light source of the backlight module is located, thereby facilitating the realization of a narrow border design; on the other hand, the circuit board of the light bar can directly replace the side plate of the back plate to support the display panel, thereby eliminating the side plate on the side where the light source of the back plate is located, which is beneficial to further reducing the border width on the side where the light source of the backlight module is located, thereby facilitating the realization of an ultra-narrow border display. Therefore, the embodiment of the present application is conducive to obtaining a backlight module with a narrow border or an ultra-narrow border, so that the display device using the backlight module of the present application can achieve a narrow border or an ultra-narrow border design.

[0024] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0026] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0027] Figure 1 is a schematic diagram of a partial cross-sectional structure of an exemplary backlight module provided in this application;

[0028] Figure 2 is a schematic diagram of a partial cross-sectional structure of another exemplary backlight module provided in the present application;

[0029] Figure 3 This is a schematic diagram of a partial cross-sectional structure of a backlight module provided in an embodiment of the present application;

[0030] Figure 4 is a front view of a light bar provided in an embodiment of the present application;

[0031] Figure 5 1 is a schematic diagram of a process of engaging and connecting the first snap structure provided in an embodiment of the present application with the first slot on the back panel;

[0032] Figure 6 2 is a schematic diagram of the structure after the second snap-fit structure provided in an embodiment of the present application is engaged with the second slot on the back panel;

[0033] Figure 7 is a top view of a connector for a light bar provided in an embodiment of the present application;

[0034] Figure 8 yes Figure 7 Schematic diagram of the cross-sectional structure at the A-A' position;

[0035] Figure 9 yes Figure 7 A side view of the connector is shown;

[0036] Figure 10 This is a schematic diagram of the assembly of the light bar and back panel provided in an embodiment of the present application;

[0037] Figure 11 is a top view of another light bar provided in an embodiment of the present application;

[0038] Figure 12 yes Figure 11 Schematic diagram of the cross-sectional structure at the B-B' position;

[0039] Figure 13 yes Figure 11 A top view of the light bar and back panel after assembly is shown;

[0040] Figure 14 yes Figure 13 Schematic diagram of the cross-sectional structure at the C-C' position;

[0041] Figure 15 yes Figure 13 Schematic diagram of the cross-sectional structure at the D-D' position;

[0042] Figure 16 is a top view of a backplane provided in an embodiment of the present application;

[0043] Figure 17 is a top view of another backplane provided in an embodiment of the present application;

[0044] Figure 18 It is a schematic diagram of the cross-sectional structure of a display device provided in an embodiment of the present application.

[0045] Description of reference numerals:

[0046] 1. Backlight module; 2. Backplane; 3. Light bar; 4. Light guide plate; 5. Bottom plate; 5a. First supporting portion; 5b. Second supporting portion; 6. Circuit board; 6a. Main body; 6b. Bend portion; 7. Light-emitting device; 8. First side; 9. First snap-fit structure; 9a. First connecting portion; 91a. First sub-connecting portion; 92a. Second sub-connecting portion; 9b. First fixing portion; 91b. First sub-fixing portion; 92b. Second sub-fixing portion;

[0047] 10. First latching slot; 10a. First side wall; 10b. Second side wall; 11. First hollow structure; 12. Second snap structure; 12a. Second connecting portion; 121a. Third sub-connecting portion; 122a. Fourth sub-connecting portion; 12b. Second fixing portion; 121b. Third sub-fixing portion; 122b. Fourth sub-fixing portion; 13. Second latching slot; 13a. Third side wall; 13b. Fourth side wall; 14. Connector; 15. Housing; 16. Third snap structure; 16a. Third connecting portion; 161a. Fifth sub-connecting portion; 162a. Sixth sub-connecting portion; 16b. Third fixing portion; 161b. Fifth sub-fixing portion; 162b. Sixth sub-fixing portion; 17. Third latching slot; 17a. First sub-trough body; 17b. Second sub-trough body; 18. Second hollow structure; 19. First contact electrode;

[0048] 20. Second contact electrode; 21. Third contact electrode; 22. Fourth contact electrode; 23. First recess; 24. Boss; 25. Connecting contact electrode; 26. Fixed contact electrode; 27. Third hollow structure; 28. First trace; 29. Second trace;

[0049] 30. Second side; 31. Fourth snap-fit structure; 32. Fourth slot; 33. Third side; 34. Fourth side; 35. Side panel; 36. Front frame; 37. Thermal adhesive; 38. First adhesive layer; 39. Second adhesive layer;

[0050] 40. Reflective sheet; 41. Optical film assembly; 42. Display device; 43. Display panel;

[0051] X, first direction; Y, second direction; Z, third direction; L1, first axis of symmetry; L2, second axis of symmetry; L3, third axis of symmetry. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0053] Figure 1 The backlight module 1 ′ of the liquid crystal display shown is limited by the thickness of the back plate 2 ′, the front frame 36 ′ and other components, so the frame of the liquid crystal display cannot be further reduced, thereby failing to achieve an ultra-narrow frame liquid crystal display.

[0054] An exemplary structure of a backlight module 1" of a four-sided borderless liquid crystal display is as follows: Figure 2 As shown, the backlight module 1" includes a back panel 2", an LED light strip 3", a diffuser, a light guide plate 4", an optical film group 41" and a front frame 36". The LED light strip 3" is adhered to the outer wall of the side panel 35" of the back panel 2" by a thermal adhesive 37", and the LED light strip 3" is located between the front frame 36" and the side panel 35" of the back panel 2". The side panel 35" of the back panel 2" is vertically arranged to the bottom panel 5", and is used for snapping and limiting with the front frame 36". The side panel 35" of the back panel 2" and the part of the bottom panel 5" connected to the side panel 35" are sunken, so that the other part of the bottom panel 5" of the back panel 2" is used together with the side panel 35" to carry the diffuser, the light guide plate 4" and the optical film group 41". The light source area of the LED light strip 3" is located above the upper end surface of the bottom panel 5", and is arranged corresponding to the light incident side of the light guide plate 4".

[0055] However, Figure 2The backlight module 1" shown has the following defects: on the one hand, the LED light strip 3" is pasted on the outer side of the side panel 35" of the back panel 2" by the thermal conductive adhesive 37", and the pasting area is limited, which makes it difficult to ensure that the LED light strip 3" is fully fixed; if the side panel 35" of the back panel 2" reserves enough pasting area, the thickness of the backlight module 1" will increase, making it difficult to achieve ultra-thin display; on the other hand, the wall thickness of the side panel 35" of the back panel 2" is limited, usually in the range of 0.6mm-0.8mm, while the thickness of the LED is usually around 0.6mm. On the right, the LED is arranged on the upper end surface of the side panel 35", so that the width of the light guide plate 4" on the side panel 35" is only about 0.2mm, which easily causes the light guide plate 4" to sink and cause abnormal picture quality; on the other hand, the side panel 35" of the back panel 2" and the front frame 36" are snapped and limited, resulting in the circuit board 6" of the LED light bar 3" needing to be grooved at the position of the snap, so that the circuit board 6" of the LED light bar 3" needs to reserve sufficient board width for routing, resulting in an increase in the thickness of the backlight module 1", making it difficult to achieve ultra-thin display.

[0056] In order to solve the above problems, the present application improves the structure of the light bar, so that during the assembly process of the backlight module, the light bar and the back plate of the backlight module are directly connected in the thickness direction of the back plate through a snap-fit structure, and the connector of the light bar is also connected to the light bar through a snap-fit structure, while achieving electrical connection between the connector and the light-emitting device of the light bar. This design can reduce the overall thickness and frame width of the backlight module while ensuring the stability of the connection between the light bar and the back plate, so as to achieve an ultra-narrow frame design and an ultra-thin display. Figure 1 Compared with the backlight module shown in FIG, the present application can at least reduce the frame width of the backlight module; Figure 2 Compared to the backlight module shown in FIG, the present application can reduce the width of the backlight module frame, avoid the sinking problem caused by the overlap between the light guide plate and the side wall of the back plate, and avoid the need for slots in the circuit board of the light bar. Therefore, the present application can achieve both an ultra-thin display and an ultra-narrow frame display while ensuring the quality of the displayed image. For details, please refer to the description of the following embodiments.

[0057] like Figures 3 to 5 As shown, an embodiment of the present application provides a backlight module 1, which includes a backplate 2 and a light bar 3. The backplate 2 includes a base plate 5, and the light bar 3 includes a circuit board 6 and a plurality of light-emitting devices 7. The circuit board 6 includes a main body 6a, and the light-emitting devices 7 are electrically connected to the main body 6a. The main body 6a is fixedly connected to the base plate 5 along the thickness direction of the base plate 5.

[0058] In some embodiments, the backlight module 1 further includes a light guide plate 4 , which is disposed on one side of the bottom plate 5 and close to the main body 6 a ; the light emitting device 7 is disposed on the side of the main body 6 a facing the light guide plate 4 .

[0059] In some embodiments, at least one first snap-fit structure 9 is provided on the main body 6 a , and at least one first snap-fit groove 10 is provided on the bottom plate 5 . The first snap-fit structure 9 is snap-fitted and connected with the first snap-fit groove 10 .

[0060] In one embodiment, Figure 4 and Figure 5 As shown, the first buckle structure 9 is arranged on a side away from the light emitting direction of the backlight module 1 , and the first slot 10 is arranged close to the first side 8 of the bottom plate 5 .

[0061] It can be understood that the main body 6 a extends along the first side 8 of the bottom plate 5 and is detachably connected to an edge region of the bottom plate 5 close to the first side 8 .

[0062] For ease of explanation, in this embodiment of the present application, the extending direction of the first side 8 is referred to as the first direction X, and the light emitting direction of the backlight module 1 is referred to as the second direction Y. It is understood that the long side of the main body 6 a of the circuit board 6 extends along the first direction X, and the short side of the main body 6 a of the circuit board 6 extends along the second direction Y, and the second direction Y is perpendicular to the bottom plate 5 of the backplane 2.

[0063] In the embodiment of the present application, when assembling the backlight module 1, the first snap-fit structure 9 of the light bar 3 can be directly inserted into the corresponding first snap-fit groove 10 along the thickness direction of the bottom plate 5, so that the first snap-fit structure 9 is engaged with the corresponding first snap-fit groove 10, thereby achieving a fixed connection between the light bar 3 and the edge of the bottom plate 5 of the back plate 2. In addition, since the first snap-fit structure 9 is arranged on the side of the main body 6a away from the light emitting direction of the backlight module 1, and the light emitting direction of the backlight module 1 is arranged perpendicular to the bottom plate 5 of the back plate 2, the main body 6a of the light bar 3 is vertically fixed to the bottom plate 5 of the back plate 2 through the engagement of the first snap-fit structure 9 and the corresponding first snap-fit groove 10, thereby avoiding the need to set a snap-fit structure or adhesive layer on the inner or outer side of the light bar 3 to achieve connection with the back plate 2 or the front frame, which is beneficial to reducing the border width on the side where the light source of the backlight module 1 is located, thereby facilitating a narrow border design. At the same time, since the main body portion 6a is disposed at the edge of the back panel 2, the main body portion 6a can function as a support for the display panel, similar to the side panels 35 of the back panel 2. Therefore, the engaged main body portion 6a can replace part of the side panels of the back panel 2, avoiding the need for side panels on the first side 8 of the back panel 2. This helps further reduce the width of the border on the light source side of the backlight module 1, thereby facilitating the realization of an ultra-narrow border display. Therefore, the embodiments of the present application facilitate obtaining a backlight module 1 with a narrow or ultra-narrow border, enabling a display device employing the backlight module 1 of the present application to achieve a narrow or ultra-narrow border design.

[0064] In some embodiments, as Figure 3As shown, the bottom plate 5 of the back panel 2 includes a first support portion 5a and a second support portion 5b located to one side of the first support portion 5a. The second support portion 5b is arranged downward relative to the first support portion 5a, and the side of the second support portion 5b away from the first support portion 5a is the first side 8. Specifically, the light guide plate 4 is arranged on the first support portion 5a, and the first retaining groove 10 is arranged on the side of the second support portion 5b away from the first support portion 5a. This arrangement helps ensure that the light incident surface of the light guide plate 4 is aligned with the light emitting surface of the light emitting device 7 on the main body 6a.

[0065] It can be understood that the light incident surface of the light guide plate 4 is the side of the light guide plate 4 close to the main body 6a, and the light emitting surface of the light emitting device 7 is the side of the light emitting device 7 away from the main body 6a.

[0066] In some embodiments, the light emitting device 7 includes a light emitting diode (LED) or a micro-light emitting diode (Micro-LED), but is not limited thereto.

[0067] In some embodiments, circuit board 6 is a metal-based circuit board. For example, circuit board 6 is an aluminum substrate, which is composed of a metal aluminum base layer, an insulating layer, and a copper foil circuit layer. The metal aluminum base layer provides mechanical strength and heat dissipation, the copper foil circuit layer is used to carry current, and the insulating layer is used to isolate the circuit from the metal layer. When the light-emitting device 7 is an LED, the copper foil circuit layer of the aluminum substrate is pre-designed with a conductive circuit, which is connected to the positive and negative pins (or pads) of the LED through solder joints to form a complete current path. Of course, the structure of circuit board 6 is not limited to this.

[0068] In some embodiments, the plurality of light emitting devices 7 are sequentially arranged along the extension direction of the first side 8 of the bottom plate 5. The plurality of light emitting devices 7 may be arranged in a single row or in multiple rows, which is not limited in this application.

[0069] In some embodiments, as Figure 4 and Figure 5As shown, the first snap-fit structure 9 includes a first connecting portion 9a and a first fixing portion 9b. The first connecting portion 9a is located in the first slot 10, and the first connecting portion 9a is fixedly connected to the main body 6a and the first fixing portion 9b at both ends in the thickness direction of the base plate 5 (i.e., the second direction Y). The first connecting portion 9a includes a first sub-connecting portion 91a and a second sub-connecting portion 92a spaced apart along the extension direction of the first side 8 (i.e., the first direction X). The first slot 10 includes a first side wall 10a and a second side wall 10b oppositely disposed along the extension direction of the first side 8. The first sub-connecting portion 91a is disposed adjacent to the first side wall 10a, and the second sub-connecting portion 92a is disposed adjacent to the second side wall 10b. The first fixing portion 9b includes a first sub-fixing portion 91b and a second sub-fixing portion 92b disposed in a one-to-one correspondence with the first sub-connecting portion 91a and the second sub-connecting portion 92a. The first sub-fixing portion 91 b extends in a direction away from the second side wall 10 b until it overlaps with the bottom plate 5 , and the second sub-fixing portion 92 b extends in a direction away from the first side wall 10 a until it overlaps with the bottom plate 5 .

[0070] It should be noted that, the overlapping arrangement with the bottom plate 5 described in the embodiment of the present application refers to overlapping arrangement with the bottom plate 5 in the thickness direction (Y direction) of the bottom plate 5 .

[0071] Understandably, Figure 5 As shown, the middle portion of the first snap-fit structure 9 is provided with a first hollow structure 11, dividing the first snap-fit structure 9 into two parts along the first direction X. One part consists of the first sub-connecting portion 91a and the first sub-fixing portion 91b, and the other part consists of the second sub-connecting portion 92a and the second sub-connecting portion 92a. When the first snap-fit structure 9 is inserted into the corresponding first slot 10, the two parts separated by the first hollow structure 11 can be squeezed, and the hollow area is compressed and reduced, thereby allowing the first snap-fit structure 9 to slide into the first slot 10. Moreover, when the first sub-fixing portion 91b and the second sub-fixing portion 92b move to the side of the first slot 10 away from the main body 6a, the two separated parts of the first snap structure 9 are no longer squeezed and restore their shape and size. At this time, the hook formed by the first sub-fixing portion 91b and the first sub-connecting portion 91a and the snap formed by the second sub-fixing portion 92b and the second sub-connecting portion 92a respectively clamp the two oppositely arranged edges of the first slot 10 (that is, the side of the first side wall 10a and the second side wall 10b away from the main body 6a), so that the main body 6a of the light strip 3 cannot move in the second direction Y.

[0072] In some embodiments, as Figure 5 As shown, when the first snap structure 9 is engaged with the first slot 10 , the length of the first connection portion 9a in the second direction Y is equal to the thickness of the base plate 5 , that is, the length of the first connection portion 9a in the second direction Y is equal to the depth of the first slot 10 .

[0073] In some embodiments, the thickness of the first connecting portion 9a in the third direction Z is equal to the thickness of the main body 6a in the third direction Z, and the width of the first latching slot 10 in the third direction Z is equal to the thickness of the main body 6a in the third direction Z. The third direction Z is perpendicular to the surface of the main body 6a on which the light-emitting device 7 is provided, that is, the third direction Z is perpendicular to both the first direction X and the second direction Y.

[0074] It can be understood that the thickness of the first connecting part 9a and the main body 6a in the third direction Z are kept consistent, which can ensure the structural stability of the first connecting part 9a to the greatest extent without increasing the border width of the backlight module 1, and ensure the connection stability between the main body 6a and the base plate 5, thereby avoiding relative displacement after the main body 6a is connected to the base plate 5 and affecting the stability of the light emitting position of the light emitting device 7, thereby helping to improve the light emitting effect and further improve the display effect of the display product.

[0075] For the sake of convenience, the thickness of the first connecting portion 9a in the third direction Z is referred to as the thickness of the first connecting portion 9a, the thickness of the main body 6a in the third direction Z is referred to as the thickness of the main body 6a, and the width of the first card slot 10 in the third direction Z is referred to as the width of the first card slot 10.

[0076] In some embodiments, as Figure 5 As shown, the length of the first card slot 10 in the first direction X is equal to the width of the first connecting portion 9a in the first direction X. It should be noted that, in the embodiment of the present application, the width of the first connecting portion 9a in the first direction X refers to the distance between the side of the first sub-connecting portion 91a facing away from the second sub-connecting portion 92a and the side of the second sub-connecting portion 92a facing away from the first sub-connecting portion 91a.

[0077] It can be understood that the length (in the first direction X), width (in the third direction Z) and depth (in the second direction Y) of the first slot 10 respectively match the width (in the first direction X), thickness (in the third direction Z) and length (in the second direction Y) of the first connecting portion 9a, so that after the first snap structure 9 is engaged with the first slot 10, the first connecting portion 9a is prevented from moving in the first slot 10, thereby ensuring the stability of the connection between the main body 6a and the bottom plate 5 of the back panel 2.

[0078] In some embodiments, as Figure 5As shown, the first latching slot 10 is centrally symmetrical about a first symmetric axis L1 extending along the thickness direction of the base plate 5 (i.e., the second direction Y). The first sub-connecting portion 91a and the second sub-connecting portion 92a are symmetrically arranged about the first symmetric axis L1, and the first sub-fixing portion 91b and the second sub-fixing portion 92b are symmetrically arranged about the first symmetric axis L1. The length of the first fixing portion 9b on the side closer to the main portion 6a in the direction extending from the first side 8 is greater than the length of the first fixing portion 9b on the side facing away from the main portion 6a in the direction extending from the first side 8.

[0079] It can be understood that the first snap-fit structure 9 is divided into two parts symmetrically arranged about the first symmetry axis L1 by the first hollow structure 11, and the first sub-fixing portion 91b and the second sub-fixing portion 92b are both wedge-shaped. For example, the cross-sections of the first sub-fixing portion 91b and the second sub-fixing portion 92b on the planes in which the first direction X and the second direction Y are located are both inverted right-angled trapezoids. Of course, the cross-sections of the first sub-fixing portion 91b and the second sub-fixing portion 92b on the planes in which the first direction X and the second direction Y are located can also be right-angled triangles. In other words, the side of the first sub-fixing portion 91b facing away from the second sub-fixing portion 92b is an inclined surface, and the side of the second sub-fixing portion 92b facing away from the first sub-fixing portion 91b is an inclined surface.

[0080] like Figure 5 As shown, when the first snap structure 9 is engaged with the corresponding first slot 10, due to the wedge-shaped structures of the first sub-fixing portion 91b and the second sub-fixing portion 92b, the narrower top portions of the first sub-fixing portion 91b and the second sub-fixing portion 92b first enter the first slot 10. Under the action of external thrust, the inclined surfaces on the outside of the first sub-fixing portion 91b and the second sub-fixing portion 92b slide more easily into the first slot 10. During this process, the first sub-fixing portion 91b and the second sub-fixing portion 92b are squeezed by the first side wall 10a and the second side wall 10b, respectively, which reduces the distance between the first sub-connecting portion 91a and the second sub-connecting portion 92a, thereby allowing the entire first connecting portion 9a to move into the first slot 10. At the same time, the first sub-fixing portion 91b and the second sub-fixing portion 92b move to the outside of the first slot 10 and are placed in contact with the bottom plate 5, thereby achieving a snap connection.

[0081] In some embodiments, the main body 6a is further provided with at least one second snap-fit structure 12, and the base plate 5 is further provided with at least one second snap-fit groove 13. The second snap-fit structure 12 and the second snap-fit groove 13 are snap-fitted together. The light bar 3 also includes a connector 14 disposed on the side of the base plate 5 facing away from the light-emitting device 7. The connector 14 is electrically connected to the main body 6a via the second snap-fit structure 12.

[0082] In one embodiment, Figure 4 and Figure 6As shown, the second snap-fit structure 12 is arranged on the side of the main body 6a facing away from the light-emitting direction of the backlight module 1. The second snap-fit structure 12 includes a second connecting portion 12a and a second fixing portion 12b. The main body 6a is sequentially engaged with the second slot 13 via the second connecting portion 12a and the second fixing portion 12b. The second connecting portion 12a is located in the second slot 13, and the two ends of the second connecting portion 12a in the thickness direction of the bottom plate 5 are fixedly connected to the main body 6a and the second fixing portion 12b respectively. The second fixing portion 12b is located on the side of the second slot 13 facing away from the main body 6a, and the connector 14 is electrically connected to the main body 6a via the second fixing portion 12b.

[0083] And, as Figure 3 、 Figures 6 to 9 As shown, connector 14 is disposed on the side of base plate 5 facing away from main body 6a. Connector 14 is electrically connected to main body 6a, thereby achieving electrical connection with light-emitting device 7. Connector 14 includes a housing 15, a third snap-fit structure 16 mounted on housing 15, and a connecting contact electrode 25. The second fixing portion 12b is provided with a third snap-fit groove 17 and a fixed contact electrode 26. The third snap-fit structure 16 and the third snap-fit groove 17 engage and connect, and the connecting contact electrode 25 and the fixed contact electrode 26 are electrically connected.

[0084] In some embodiments, the third snap structure 16 protrudes beyond the connecting contact electrode 25 in the extension direction of the third snap structure 16. It is understandable that after the third snap structure 16 is engaged with the third slot 17, the connecting contact electrode 25 and the fixed contact electrode 26 are electrically connected.

[0085] In some embodiments, the extension direction of the third snap structure 16 (ie, the plugging direction of the third snap structure 16 ) and the extension direction of the second snap structure 12 (ie, the plugging direction of the second snap structure 12 ) intersect with each other.

[0086] In one embodiment, the extension direction of the third buckle structure 16 and the extension direction of the second buckle structure 12 are perpendicular to each other.

[0087] It should be noted that the plug-in direction refers to the moving direction in which the snap structure moves toward the slot under the action of an external force to achieve a snap connection.

[0088] It can be understood that the connector 14 of the light strip 3 in the embodiment of the present application can be directly snap-connected with the second fixing portion 12b in the second snap-fit structure 12 on the back side of the base plate 5 (the side away from the main body 6a). This connection method has a simple structure and is easy to assemble. It is also conducive to achieving a thinner thickness of the backlight module 1 and has high practicality.

[0089] In some embodiments, as Figure 6As shown, the second connecting portion 12a includes a third sub-connecting portion 121a and a fourth sub-connecting portion 122a spaced apart along the extension direction of the first side 8 (i.e., the first direction X). The second latching slot 13 includes a third side wall 13a and a fourth side wall 13b disposed opposite each other along the extension direction of the first side 8. The third sub-connecting portion 121a is disposed adjacent to the third side wall 13a, and the fourth sub-connecting portion 122a is disposed adjacent to the fourth side wall 13b. The second fixing portion 12b includes a third sub-fixing portion 121b and a fourth sub-fixing portion 122b corresponding to the third sub-connecting portion 121a and the fourth sub-connecting portion 122a. The third sub-fixing portion 121b extends away from the fourth side wall 13b until it overlaps with the bottom plate 5, and the fourth sub-fixing portion 122b extends away from the third side wall 13a until it overlaps with the bottom plate 5.

[0090] Among them, the third slot 17 includes a first sub-slot body 17a and a second sub-slot body 17b arranged relatively to each other in the extension direction of the first side 8, the first sub-slot body 17a is arranged on the side of the third sub-fixing portion 121b close to the fourth sub-fixing portion 122b, and the second sub-slot body 17b is arranged on the side of the fourth sub-fixing portion 122b close to the third sub-fixing portion 121b.

[0091] As will be appreciated, the middle portion of the second snap structure 12 is provided with a second hollow structure 18, dividing the second snap into two portions along the first direction X. Therefore, the second snap structure 12 can achieve a snap connection with the corresponding second snap slot 13 in the same manner as the first snap structure 9. The specific snap connection process will not be repeated here. Since the third snap slot 17 is provided on the second fixing portion 12b and the second hollow structure 18 extends through the second fixing portion 12b, the first sub-slot 17a and the second sub-slot 17b of the third snap slot 17 are both connected to the second hollow structure 18, thereby forming a cross-shaped hollow structure on the second snap structure 12.

[0092] In some embodiments, the second slot 13 and the first slot 10 have the same shape and size (including length, width, and depth), and the second connecting portion 12a and the first connecting portion 9a have the same shape and size (length, width, and thickness). This allows the first slot 10 and the second slot 13 to be formed in the same manufacturing process, and the first connecting portion 9a and the second connecting portion 12a to be formed in the same manufacturing process, which helps simplify the manufacturing process. At the same time, the thickness of the second connecting portion 12a is the same as the thickness of the main body 6a, ensuring the stability of the connection between the second snap structure 12 and the second slot 13, thereby further ensuring the stability of the connection between the main body 6a and the bottom plate 5.

[0093] Of course, in other embodiments, the shapes and sizes of the second card slot 13 and the first card slot 10 may also be different. Correspondingly, the shapes and sizes of the second connecting portion 12a and the first connecting portion 9a may also be different. This embodiment of the present application does not limit this.

[0094] In some embodiments, as Figure 6 As shown, the fixed contact electrode 26 includes a first contact electrode 19 provided on a side of the third sub-fixing portion 121b facing the interior of the backlight module 1 and a second contact electrode 20 provided on a side of the fourth sub-fixing portion 122b facing the interior of the backlight module 1. Both the first contact electrode 19 and the second contact electrode 20 are electrically connected to the light emitting device 7. Figure 7 and Figure 8 As shown, the connecting contact electrodes 25 include a third contact electrode 21 and a fourth contact electrode 22 that are disposed on the housing 15 and electrically connected to the first contact electrode 19 and the second contact electrode 20 in a one-to-one correspondence.

[0095] In some embodiments, the first contact electrode 19 and the second contact electrode 20 are electrically connected to the light emitting device 7 through the second connecting portion 12 a and the wiring or metal layer in the main body 6 a .

[0096] like Figures 7 to 9 As shown, the third snap-fit structure 16 includes a third connecting portion 16a and a third fixing portion 16b. The third connecting portion 16a is located in the third slot 17, and its opposite ends are connected to the housing 15 and the third fixing portion 16b, respectively. The second fixing portion 12b is located between the housing 15 and the third fixing portion 16b. The third contact electrode 21 and the fourth contact electrode 22 are located on the side of the third connecting portion 16a facing away from the third fixing portion 16b, and are arranged so as not to overlap with the third connecting portion 16a.

[0097] In one specific embodiment, the third contact electrode 21 and the fourth contact electrode 22 are respectively arranged in a one-to-one correspondence with the first contact electrode 19 and the second contact electrode 20. In other words, after the third snap structure 16 is engaged with the corresponding third snap slot 17, the third contact electrode 21 and the fourth contact electrode 22 on the connector 14 are respectively in direct contact with the first contact electrode 19 and the second contact electrode 20 on the second fixing portion 12b, thereby achieving electrical connection between the connector 14 and the main body 6a.

[0098] In some embodiments, as Figure 6 As shown, the second card slot 13 is symmetrical about the second symmetry axis L2 extending in the thickness direction of the base plate 5, the third sub-connecting portion 121a and the fourth sub-connecting portion 122a are symmetrically arranged about the second symmetry axis L2, and the third sub-fixing portion 121b and the fourth sub-fixing portion 122b are symmetrically arranged about the second symmetry axis L2.

[0099] The length of the second fixing portion 12b on the side closer to the main portion 6a in the extending direction of the first side 8 is greater than the length of the second fixing portion 12b on the side facing away from the main portion 6a in the extending direction of the first side 8. The first contact electrode 19 completely covers the side of the third sub-fixing portion 121b facing the interior of the backlight module 1, and the second contact electrode 20 completely covers the side of the fourth sub-fixing portion 122b facing the interior of the backlight module 1.

[0100] As can be understood, the second fixing portion 12b and the first fixing portion 9b both have a wedge-shaped shape. Unlike the first fixing portion 9b, the second fixing portion 12b has a contact electrode on its surface and a third latching groove 17 in its center. Therefore, the second latching structure 12 can be used to secure the main body 6a of the light bar 3 to the bottom plate 5 of the back panel 2 and also achieve an electrical connection between the connector 14 of the light bar 3 and the main body 6a.

[0101] In some embodiments, the length of the side of the second fixing portion 12b close to the main portion 6a in the first direction X is equal to the length of the side of the first fixing portion 9b close to the main portion 6a in the first direction X, the length of the side of the second fixing portion 12b facing away from the main portion 6a in the first direction X is equal to the length of the side of the first fixing portion 9b facing away from the main portion 6a in the first direction X, and the height of the second fixing portion 12b in the second direction Y is equal to the height of the first fixing portion 9b in the second direction Y. In other words, the dimensions of the first hollow structure 11 and the second hollow structure 18 are exactly the same.

[0102] In some embodiments, the thickness of the second fixing portion 12 b in the third direction Z is equal to the thickness of the second fixing portion 12 b in the third direction Z, and is equal to the thickness of the main body portion 6 a in the third direction Z.

[0103] Of course, in other embodiments, the shape and size of the second fixing portion 12b may also be different from the shape and size of the first fixing portion 9b, and this embodiment of the present application does not limit this.

[0104] Usually, such as Figure 1 In the illustrated backlight module, the thickness of the light bar connector (typically, the thickness of the wire box connector is approximately 3.5 mm) prevents further reduction of the backlight module thickness, thus preventing the realization of an ultra-thin LCD display. To address this issue, the present embodiment not only provides a third snap-fit structure 16 on the connector 14 of the light bar 3, but also improves the internal structure of the connector 14, so that the third snap-fit structure 16, the third contact electrode 21, and the fourth contact electrode 22 are all disposed within the recessed groove via a recessed groove design. This helps reduce the overall size of the connector 14, thereby reducing the overall thickness of the backlight module 1. For details, please refer to the following description.

[0105] In some embodiments, as Figure 7 and Figure 8 As shown, a first recess 23 is provided on one side of the housing 15 of the connector 14 , a boss 24 is provided at the bottom of the first recess 23 , a connecting contact electrode 25 is located in the first recess 23 , and the third snap-fit structure 16 is connected to the boss 24 .

[0106] In a specific embodiment, the third contact electrode 21 and the fourth contact electrode 22 are spaced apart and arranged at the bottom of the first recess 23 in the extending direction of the first side 8 .

[0107] In the plugging direction of the third buckle structure 16, the height of the third connecting portion 16a is greater than or equal to the height of the first sink 23, and the height of the third contact electrode 21 and the fourth contact electrode 22 is greater than or equal to the height of the boss 24. Figure 10 As shown, when the connector 14 and the second fixing portion 12 b are assembled, the second fixing portion 12 b is at least partially located in the first recess 23 , and the third fixing portion 16 b is located on a side of the second fixing portion 12 b away from the boss 24 .

[0108] In some embodiments, the plugging direction of the third snap structure 16 is parallel to the third direction Z, and the difference between the height of the third connection portion 16a in the third direction Z and the height of the third contact electrode 21 and the fourth contact electrode 22 in the third direction Z is equal to the thickness of the main body 6a.

[0109] In one specific embodiment, the third contact electrode 21 and the fourth contact electrode 22 have the same height in the third direction Z, and the height of the third contact electrode 21 and the fourth contact electrode 22 in the third direction Z is equal to the height of the boss 24 in the third direction Z. In this case, the height of the third connecting portion 16 a in the third direction Z is equal to the thickness of the main body 6 a.

[0110] Of course, in other embodiments, the heights of the third contact electrode 21 and the fourth contact electrode 22 in the third direction Z are equal, and the heights of the third contact electrode 21 and the fourth contact electrode 22 in the third direction Z are greater than the height of the boss 24 in the third direction Z. In this case, the height of the third connecting portion 16 a in the third direction Z is greater than the thickness of the main body 6 a.

[0111] In some embodiments, combined Figures 6 to 8 as well as Figure 10 As shown, the third connecting portion 16a includes a fifth sub-connecting portion 161a and a sixth sub-connecting portion 162a spaced apart along the extending direction of the first side 8. The fifth sub-connecting portion 161a is at least partially located within the first sub-slot 17a, and the sixth sub-connecting portion 162a is at least partially located within the second sub-slot 17b. The second fixing portion 12b includes a fifth sub-fixing portion 161b and a sixth sub-fixing portion 162b, which are arranged in a one-to-one correspondence with the fifth sub-connecting portion 161a and the sixth sub-connecting portion 162a.

[0112] The fifth sub-connecting portion 161a and the sixth sub-connecting portion 162a are symmetrically arranged about a third symmetric axis L3 perpendicular to the boss 24. The fifth sub-fixing portion 161b and the sixth sub-fixing portion 162b are symmetrically arranged about the third symmetric axis L3. Furthermore, the first sub-trough 17a and the second sub-trough 17b are symmetrically arranged about the third symmetric axis L3. The length of the side of the third fixing portion 16b closer to the boss 24 in the direction extending from the first side 8 is greater than the length of the side of the third fixing portion 16b facing away from the boss 24 in the direction extending from the first side 8.

[0113] It can be understood that a third hollow structure 27 is provided in the middle part of the third snap-fit structure 16, which divides the third snap-fit structure 16 into two symmetrical parts. Therefore, the third snap-fit structure 16 can be snap-fitted with the corresponding third slot 17 in the same way as the first snap-fit structure 9. The specific snap-fitting process will not be repeated here.

[0114] In some embodiments, the shape of the third fixing portion 16b is the same as that of the first fixing portion 9b. For example, the cross-sectional shape of the fifth sub-fixing portion 161b and the sixth sub-fixing portion 162b is a right trapezoid or a right triangle.

[0115] In some embodiments, the shape and size of the third contact electrode 21 are the same as those of the first contact electrode 19, and the shape and size of the fourth contact electrode 22 are the same as those of the second contact electrode 20. This design can avoid excessive thickness of the connector 14 or the second fixing portion 12b while ensuring a large contact area between the contact electrodes on the connector 14 and the contact electrodes on the second fixing portion 12b. This ensures the stability of the electrical connection between the connector 14 and the light-emitting device 7 and helps reduce the overall thickness of the backlight module 1.

[0116] In some embodiments, the material of the first contact electrode 19, the second contact electrode 20, the third contact electrode 21 and the fourth contact electrode 22 includes copper. For example, the first contact electrode 19, the second contact electrode 20, the third contact electrode 21 and the fourth contact electrode 22 are all copper leakage areas. For example, the first contact electrode 19 and the third contact electrode 21 are positive copper leakage areas, and the second contact electrode 20 and the fourth contact electrode 22 are negative copper leakage areas.

[0117] In some embodiments, as Figure 8 and Figure 9 As shown, the connector 14 also includes a first trace 28 and a second trace 29 electrically connected to the third contact electrode 21 and the fourth contact electrode 22 respectively. After the connector 14 is electrically connected to the external power supply device through the first trace 28 and the second trace 29, power can be supplied to the light-emitting device 7, thereby lighting the light-emitting device 7.

[0118] In some embodiments, the projection of the first sink 23 in the third direction Z is in the shape of a regular trapezoid, but is not limited thereto.

[0119] In some embodiments, the thickness of the third connection portion 16a in the second direction Y is equal to the height of the third slot 17 in the second direction Y, and the width of the third connection portion 16a in the first direction X is equal to the length of the third slot 17 in the first direction X.

[0120] It should be noted that the width of the third connection portion 16a in the first direction X is equal to the distance between the side of the fifth sub-connection portion 161a away from the sixth sub-connection portion 162a and the side of the sixth sub-connection portion 162a away from the fifth sub-connection portion 161a.

[0121] In some embodiments, as Figures 11 to 15 As shown, the bottom plate 5 further includes a second side 30 adjacent to the first side 8. The circuit board 6 of the light bar 3 further includes a bent portion 6b connected to the main portion 6a. The bent portion 6b is fixedly connected to the bottom plate 5 along the thickness direction of the bottom plate 5. The bent portion 6b extends along the extension direction of the second side 30.

[0122] In some embodiments, at least one fourth snap-fit structure 31 is provided on the bent portion 6 b , and at least one fourth snap-fit groove 32 is provided on the bottom plate 5 ; the fourth snap-fit structure 31 is snap-fitted and connected to the fourth snap-fit groove 32 .

[0123] In a specific embodiment, the fourth locking structure 31 is disposed on a side of the bent portion 6 b away from the light emitting direction of the backlight module 1 .

[0124] It can be understood that the extension direction of the first side 8 and the extension direction of the second side 30 are perpendicular to each other, and the extension direction of the second side 30 is parallel to the third direction Z.

[0125] Because the main portion 6a and the bent portion 6b of the circuit board 6, facing away from the light-emitting direction of the backlight module 1, are both engaged with the slots on the bottom plate 5 of the back panel 2 via a snap-fit structure, and the main portion 6a and the bent portion 6b are arranged vertically, the circuit board 6 of the light bar 3 cannot move in the extension direction of the first side 8 (first direction X), the extension direction of the second side 30 (third direction Z), and the second direction Y. This allows the circuit board 6 of the light bar 3 to be fully fixed to the back panel 2, ensuring the stability of the connection between the two. Furthermore, the main portion 6a and the bent portion 6b of the circuit board 6 can replace part of the side panel 35 of the back panel 2, and together with the side panels 35 on the other sides of the back panel 2, support the display panel.

[0126] In some embodiments, as Figure 14 and Figure 15As shown, the fourth snap structure 31 has the same structure as the first snap structure 9 , and correspondingly, the fourth snap slot 32 has the same shape and size as the first snap slot 10 .

[0127] In some embodiments, as Figure 16 As shown, the first slot 10 and the second slot 13 both extend through the first side 8 of the bottom plate 5, and the fourth slot 32 extends through the second side 30 of the bottom plate 5. This design allows the side of the main body 6a facing away from the light-emitting device 7 to be flush with the first side 8 of the bottom plate 5, thereby further reducing the border width on the light source side of the backlight module 1.

[0128] In some embodiments, as Figure 13 and Figure 16 As shown, in the extension direction of the bent portion 6b, the length of the bent portion 6b is less than the length of the second side 30 of the bottom plate 5. The back plate 2 also includes a side plate 35 connected to the bottom plate 5 in a bent manner; wherein the side plate 35 is disposed adjacent to the bent portion 6b and is configured to jointly support the display panel.

[0129] In some embodiments, the length of the main body 6a in the extension direction is equal to the length of the bottom plate 5; wherein the main body 6a is configured to support the display panel. This design allows the main body 6a to replace the entire side panel of the first side 8 of the bottom plate 5.

[0130] In one embodiment, the bottom plate 5 further includes a third side 33 disposed opposite the first side 8 and a fourth side 34 disposed opposite the second side 30. The first side 8, second side 30, third side 33, and fourth side 34 are sequentially connected. Side plates 35 extend from the second side 30, third side 33, and fourth side 34 toward the light output direction of the backlight module 1. The light guide plate 4 is located in the space enclosed by the side plates 35, the main body 6a, and the bent portion 6b.

[0131] In other embodiments, the circuit board 6 includes two oppositely arranged bending portions 6b, wherein one bending portion 6b extends along the extension direction of the second side 30 and is snap-connected to the second side 30 of the bottom plate 5 via a snap-fit structure, and the other bending portion 6b extends along the extension direction of the fourth side 34 and is snap-connected to the fourth side 34 of the bottom plate 5 via a snap-fit structure. In this case, the snap-fit structures on the two bending portions 6b are the same, and the card slots on the second side 30 and the fourth side 34 are the same. The length of the bending portion 6b in the extension direction of the second side 30 is less than the length of the second side 30, and the length of the bending portion 6b in the extension direction of the fourth side 34 is less than the length of the fourth side 34. Figure 17 As shown, the back panel 2 further includes side panels 35 extending from the second side 30 , the third side 33 and the fourth side 34 toward the light emitting direction of the backlight module 1 ; the light guide plate 4 is located in the space enclosed by the side panels 35 , the main body 6 a and the bent portion 6 b.

[0132] It can be understood that the side panels 35 , the main body 6 a and the bent portion 6 b all play a role in supporting the display panel.

[0133] In some embodiments, the side plate 35 , the main body 6 a , and the bent portion 6 b have the same height in the second direction Y, but the present invention is not limited thereto.

[0134] In some embodiments, as Figure 3 As shown, the backlight module 1 further includes a front frame 36 arranged corresponding to the circuit board 6 . The front frame 36 is fixedly connected to the circuit board 6 so that the circuit board 6 is configured to support the display panel through the front frame 36 .

[0135] In some embodiments, the front frame 36 is arranged opposite to the base plate 5 and extends to the side of the circuit board 6 facing away from the light-emitting device 7. The material of the front frame 36 is selected from metal material, and the side of the circuit board 6 facing away from the light-emitting device 7 is fixedly connected to the front frame 36 by thermal conductive glue 37.

[0136] It is understandable that when the light-emitting device 7 of the light bar 3 emits light, both the light-emitting device 7 and the circuit board 6 will generate heat. Therefore, the material of the front frame 36 corresponding to the circuit board 6 is a material with good thermal conductivity to conduct the heat generated by the light bar 3.

[0137] In some embodiments, the material of the front frame 36 is selected from electrolytic galvanized steel sheet, but is not limited thereto.

[0138] In some embodiments, the front frame adopts a segmented design. For example, the front frame includes a first sub-front frame and a second sub-front frame. The first sub-front frame is arranged corresponding to the side panel, and the first sub-front frame is arranged opposite to the bottom panel and extends to the side of the side panel facing away from the light guide plate, and the first sub-front frame and the side panel are detachably connected. The embodiment of the present application does not limit the material of the first sub-front frame, nor does it limit the connection method between the first sub-front frame and the side panel. The second sub-front frame is arranged corresponding to the circuit board, and is arranged opposite to the bottom panel and extends to the side of the circuit board facing away from the light-emitting device. The portion of the second sub-front frame located on the side of the circuit board facing away from the light-emitting device is fixedly connected to the circuit board by thermally conductive adhesive; the material of the second sub-front frame is selected from metal materials.

[0139] In some embodiments, a first adhesive layer 38 is provided on a side of the front frame 36 disposed opposite the bottom plate 5 and adjacent to the light guide plate 4. The first adhesive layer 38 is connected to a side of the light guide plate 4 adjacent to the circuit board 6. A second adhesive layer 39 is provided on a side of the front frame 36 disposed opposite the bottom plate 5 and facing away from the light guide plate 4 to secure the display panel.

[0140] Of course, in other embodiments, the display panel may also be fixedly connected to the front frame 36 in other ways, which is not limited in the embodiment of the present application.

[0141] In some embodiments, as Figure 3 As shown, the backlight module 1 further includes a reflective sheet 40 disposed between the bottom plate 5 and the light guide plate 4 and an optical film assembly 41 disposed on the side of the light guide plate 4 away from the reflective sheet 40. It can be understood that the reflective sheet 40 is disposed on the first support portion 5a.

[0142] In the embodiment of the present application, by removing part of the side panels 35 of the back panel 2, the circuit board 6 of the light bar 3 is bent and then engaged with the slots (first slot 10, second slot 13, and fourth slot 32) on the first side 8 and second side 30 of the back panel 2 via the first snap structure 9, the second snap structure 12, and the fourth snap structure 31, respectively. This allows the circuit board 6 of the light bar 3 to replace part of the side panels 35 of the back panel 2, thereby facilitating a reduction in the size of the bezel on the side where the light source of the backlight module 1 is located, thereby facilitating a narrow bezel design. Simultaneously, the connector 14 of the light bar 3 is configured as an external snap device, and the third snap structure 16 and contact electrode on the connector 14 are disposed in a recessed groove of the object. This allows the connector 14 of the light bar 3 to engage with the third slot 17 on the second snap structure 12 extending from the circuit board 6 via the third snap structure 16. This structure is simple and easy to assemble, while also facilitating a reduction in the size of the connector 14, thereby facilitating a thinner design of the backlight module 1. Therefore, the embodiment of the present application is conducive to achieving an ultra-narrow frame design and an ultra-thin display of a display device using the backlight module 1.

[0143] like Figure 18 As shown, an embodiment of the present application further provides a display device 42 , which includes a display panel 43 and the backlight module 1 described in the aforementioned embodiment; the display panel 43 is arranged on the light-emitting side of the backlight module 1 .

[0144] In some embodiments, the display panel 43 is disposed on a side of the front frame 36 facing away from the light guide plate 4 , and is fixedly connected to the front frame 36 via the second adhesive layer 39 .

[0145] Of course, in other embodiments, the display panel 43 may also be fixedly connected to the front frame 36 in other ways, which is not limited in the embodiment of the present application.

[0146] In some embodiments, the display panel 43 is a liquid crystal display panel, but is not limited thereto.

[0147] In the embodiment of the present application, by improving the structure of the light bar 3, the frame of the display module is narrowed and the thickness is reduced, which is conducive to realizing the ultra-narrow frame design and ultra-thin display of the display device 42.

[0148] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify 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, "plurality" means two or more, unless otherwise specifically defined.

[0149] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0150] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0151] The above are merely preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A backlight module, characterized in that: The backlight module includes: Back plate, including bottom plate; A light bar comprising a circuit board and a plurality of light emitting devices; the circuit board comprises a main body, and the light emitting devices are electrically connected to the main body; Wherein, the main body is fixedly connected to the bottom plate along the thickness direction of the bottom plate.

2. The backlight module according to claim 1, wherein: At least one first buckle structure is provided on the main body, and at least one first buckle slot is provided on the bottom plate. The first buckle structure is engaged and connected with the first buckle slot.

3. The backlight module according to claim 1, wherein: The main body is further provided with at least one second snap-fit structure, and the bottom plate is further provided with at least one second snap-fit groove, wherein the second snap-fit structure is snap-fitted and connected with the second snap-fit groove; The light bar further includes a connector disposed on a side of the bottom plate away from the light-emitting device; wherein the connector is electrically connected to the main body via the second snap-fit structure.

4. The backlight module according to claim 3, wherein: The second buckle structure includes a second connecting portion and a second fixing portion, the main body is engaged with the second slot via the second connecting portion and the second fixing portion in sequence, and the second connecting portion is located in the second slot; The second fixing portion is located on a side of the second slot facing away from the main body, and the connector is electrically connected to the main body via the second fixing portion.

5. The backlight module according to claim 4, wherein: The connector includes a third snap structure and a connecting contact electrode, and the second fixing portion is provided with a third snap groove and a fixed contact electrode; The third buckle structure and the third slot are engaged and connected, and the connecting contact electrode and the fixed contact electrode are electrically connected.

6. The backlight module according to claim 5, wherein: An extension direction of the third buckle structure intersects with an extension direction of the second buckle structure.

7. The backlight module according to claim 5, wherein: The connector further comprises a housing, and the third snap-fit structure and the connecting contact electrode are mounted on the housing; Wherein, the third buckle structure protrudes beyond the connecting contact electrode in an extension direction of the third buckle structure.

8. The backlight module according to claim 7, wherein: The housing is provided with a first recessed groove, and a boss is provided at the bottom of the first recessed groove; wherein the connection contact electrode is located in the first recessed groove, and the third snap-fit structure is connected to the boss.

9. The backlight module according to any one of claims 1 to 8, wherein: The circuit board further includes a bending portion connected to the main body portion in a bending manner, and the bending portion is fixedly connected to the bottom plate along a thickness direction of the bottom plate.

10. The backlight module according to claim 9, wherein: At least one fourth snap-fit structure is provided on the bending portion, and at least one fourth snap-fit slot is provided on the bottom plate; the fourth snap-fit structure is snap-connected with the fourth snap-fit slot.

11. The backlight module according to claim 9, wherein: In the extension direction of the bending portion, the length of the bending portion is smaller than the length of the base plate; the back plate also includes a side plate bently connected to the base plate; wherein the side plate is arranged adjacent to the bending portion and is configured to jointly support the display panel.

12. The backlight module according to any one of claims 1 to 8, characterized in that: In the extension direction of the main body, the length of the main body is equal to the length of the bottom plate; wherein the main body is configured to support the display panel.

13. The backlight module according to any one of claims 1 to 8, characterized in that: The backlight module further includes a front frame; wherein the front frame is fixedly connected to the circuit board, so that the circuit board is configured to support the display panel through the front frame.

14. The backlight module according to claim 13, wherein: The front frame is arranged opposite to the bottom plate and extends to a side of the circuit board away from the light emitting device; The material of the front frame is selected from metal materials, and the side of the circuit board facing away from the light-emitting device is fixedly connected to the front frame via a thermally conductive tape.

15. A display device, characterized in that: It comprises a display panel and a backlight module as claimed in any one of claims 1 to 14; the display panel is arranged on the light-emitting side of the backlight module.

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