Backlight module and display device

Abstract

The utility model relates to the technical field of display, and discloses a backlight module and a display device. The backlight module comprises a back plate, a light guide plate and a light bar assembly, wherein an accommodating space is formed on the back plate; the light guide plate is arranged in the accommodating space and is provided with a light incident surface which is inclined relative to the horizontal plane; the light bar assembly comprises an installation part and a light bar arranged on the installation part, a light-emitting face is arranged on the light bar, the light-emitting face and the light-in face are oppositely and parallelly arranged, and the installation part and the back plate are arranged in a split mode. According to the backlight module, the thin design of a machine model can be realized, the reduction of the light energy utilization rate of the light bar is avoided, and the reliability of the whole display device can be ensured.

Description

Technical Field

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

[0002] Liquid crystal display (LCD) has many advantages such as being thin, light, energy-saving, and radiation-free. It is widely used in electronic devices such as high-definition digital televisions, desktop computers, personal digital assistants (PDAs), laptop computers, mobile phones, digital cameras, etc. Most of the liquid crystal display devices in the related art are backlight liquid crystal display devices, which include a liquid crystal panel and a backlight module. The working principle of the liquid crystal panel is to place liquid crystal molecules between two parallel glass substrates. There are many vertical and horizontal thin wires between the two glass substrates. The liquid crystal molecules are controlled to change direction by turning on or off the power, and the light from the backlight module is refracted to produce a picture. Since the liquid crystal panel itself does not emit light, it needs the light source provided by the backlight module to display the image normally. Therefore, the backlight module is one of the key structures of the liquid crystal display device.

[0003] like Figure 1 As shown, the backlight module in the related art generally includes a back panel 100', a light guide plate 200' and a light bar assembly 300', the back panel 100' includes a bottom panel 110' and a side panel 120' erected on the bottom panel 110', a receiving space 101' is formed between the bottom panel 110' and the side panel 120', the light guide plate 200' is arranged in the receiving space 101', the light bar assembly 300' includes a PCB board 310' and an LED lamp 320' arranged on the PCB board 310', the PCB board 310' is arranged on the side panel 120', the LED lamp 320' is opposite to the side of the light guide plate 200', and the LED lamp 320' is located in the middle of the light guide plate 200' in the height direction. To achieve thinner devices, the following two methods are commonly used in the prior art: 1) reducing the thickness of the light guide plate 200'. This design will increase the proportion of light emitted by the LED lamp 320' that cannot reach the light guide plate 200', thereby reducing the light energy utilization rate of the LED lamp 320'; 2) reducing the thickness of the diaphragm. This design will affect the reliability of the entire display device.

[0004] Therefore, there is an urgent need to provide a backlight module to solve the above problems. Utility Model Content

[0005] The purpose of the present invention is to provide a backlight module and a display device, which can realize a thin design of the machine model, avoid the reduction of the light energy utilization rate of the LED lamp, and ensure the reliability of the entire display device.

[0006] As conceived above, the technical solution adopted by the utility model is:

[0007] A backlight module, comprising:

[0008] a back plate, wherein an accommodating space is formed on the back plate;

[0009] A light guide plate is disposed in the accommodating space, wherein the light guide plate is provided with a light incident surface inclined relative to a horizontal plane;

[0010] The light bar assembly includes a mounting member and a light bar arranged on the mounting member. The light bar is provided with a light emitting surface, which is opposite to and parallel to the light incident surface. The mounting member is separately arranged from the back plate.

[0011] As a preferred solution of the backlight module provided by the present invention, the mounting member includes a mounting portion and a plug-in portion connected to each other, the mounting portion is used to install the light strip, a plug-in slot is provided on the back panel, and the plug-in portion is plugged into the plug-in slot.

[0012] As a preferred solution of the backlight module provided by the present invention, the plug-in portion includes at least two plug-in protrusions spaced apart along the length direction of the mounting portion, and each of the plug-in protrusions corresponds to one of the plug-in slots; or

[0013] The plug-in slot is a strip-shaped slot, and the plug-in portion is plugged into the plug-in slot at a side away from the mounting portion.

[0014] As a preferred solution of the backlight module provided by the present invention, a limiting portion capable of abutting against the back plate is provided between the mounting portion and the plug-in portion.

[0015] As a preferred solution of the backlight module provided by the present invention, an elastic member is provided between the plug slot and the plug portion.

[0016] As a preferred solution of the backlight module provided by the present invention, the mounting member is adhered to the back plate.

[0017] As a preferred solution of the backlight module provided by the present invention, the light incident surface on the light guide plate gradually tilts downward in a direction close to the light bar assembly; or

[0018] The light incident surface on the light guide plate gradually tilts upward in a direction approaching the light bar assembly.

[0019] As a preferred solution of the backlight module provided by the present invention, a supporting protrusion is provided on the light incident surface and is supported by the light emitting surface.

[0020] As a preferred solution of the backlight module provided by the present invention, the angle between the light incident surface and the horizontal plane is 30° to 90°.

[0021] The present invention also provides a display device, comprising a liquid crystal panel and the backlight module as described above, wherein the backlight module is used to carry the liquid crystal panel and to provide a backlight source for the liquid crystal panel.

[0022] The beneficial effects of the utility model are:

[0023] The present utility model provides a backlight module, which enables the light incident surface of a light guide plate to be tilted relative to a horizontal plane, and the light emitting surface of a light strip to be parallel to the light incident surface, so that the light emitted by the light strip can be vertically incident into the light guide plate, thereby reducing light loss; in addition, according to the principle that the hypotenuse of a right triangle is the longest, under the premise of having light guide plates of the same thickness, the light incident surface area of ​​the light guide plate in this embodiment is larger, thereby improving the light energy utilization rate of the light strip; when realizing a lightweight design of the machine model, only the thickness of the light guide plate can be thinned, and there is no need to adjust the size of the diaphragm, thereby ensuring the reliability of the backlight module; by arranging the mounting member and the back plate as a split structure, interference between the light guide plate and the light strip assembly can be avoided when assembling the backlight module, thereby improving the yield rate of the backlight module.

[0024] The utility model also provides a display device. By applying the above-mentioned backlight module, a thin design of the device can be achieved, the reduction of the light energy utilization rate of the light bar can be avoided, and the reliability of the entire display device can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of a backlight module provided by the prior art;

[0026] Figure 2 This is a schematic cross-sectional view of the backlight module provided in the first embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the light bar provided in the first embodiment of the present invention;

[0028] Figure 4 This is a schematic top view of the back plate and light guide plate provided in the first embodiment of the present utility model;

[0029] Figure 5 This is a schematic structural diagram of the light bar assembly provided in the first embodiment of the present invention;

[0030] Figure 6 This is a schematic cross-sectional view of the backlight module provided in the second embodiment of the present invention;

[0031] Figure 7This is a schematic top view of the back plate and light guide plate provided in the second embodiment of the present utility model;

[0032] Figure 8 This is a structural diagram of the light bar assembly provided in the second embodiment of the present utility model;

[0033] Figure 9 This is a side structural diagram of the light bar assembly provided in the second embodiment of the present utility model;

[0034] Figure 10 This is a schematic cross-sectional view of the backlight module provided in the third embodiment of the present invention;

[0035] Figure 11 This is a schematic cross-sectional view of the backlight module provided in the fourth embodiment of the present invention;

[0036] Figure 12 This is a schematic cross-sectional view of the backlight module provided in the fifth embodiment of the present invention;

[0037] Figure 13 This is a schematic cross-sectional view of the backlight module provided in the sixth embodiment of the present invention;

[0038] Figure 14 This is a schematic cross-sectional structural diagram of the backlight module provided in the seventh embodiment of the present utility model.

[0039] In the picture:

[0040] 100', back panel; 101', storage space; 110', bottom panel; 120', side panel; 200', light guide plate; 300', light bar assembly; 310', PCB board; 320', LED light;

[0041] 100, back panel; 101, storage space; 102, plug-in slot; 110, bottom panel; 120, side panel;

[0042] 200, light guide plate; 201, light incident surface; 202, supporting protrusion;

[0043] 300, light bar assembly; 310, mounting member; 311, mounting portion; 3111, third mounting surface; 312, plug-in portion; 3121, plug-in protrusion; 3122, first portion; 3123, second portion; 313, stopper; 314, intermediate connecting portion; 320, light bar; 321, circuit board; 3211, first mounting surface; 3212, second mounting surface; 322, LED lamp; 3221, light-emitting surface;

[0044] 400. Elastic parts. DETAILED DESCRIPTION

[0045] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

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

[0047] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0048] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0049] Example 1

[0050] Figure 2 FIG. 1 shows a cross-sectional structural diagram of the backlight module provided in this embodiment. Figure 2As shown, this embodiment provides a backlight module, which includes a back panel 100, a light guide plate 200 and a light bar assembly 300, wherein a accommodating space 101 is formed on the back panel 100; the light guide plate 200 is arranged in the accommodating space 101, and a light incident surface 201 inclined relative to a horizontal plane is provided on the light guide plate 200; the light bar assembly 300 includes a mounting member 310 and a light bar 320 arranged on the mounting member 310, and a light emitting surface 3221 is provided on the light bar 320, and the light emitting surface 3221 is arranged opposite to and parallel to the light incident surface 201, and the mounting member 310 and the back panel 100 are separately arranged.

[0051] The backlight module provided in this embodiment, by tilting the light incident surface 201 of the light guide plate 200 relative to the horizontal plane, and setting the light emitting surface 3221 of the light bar 320 to be parallel to the light incident surface 201, the light emitted by the light bar 320 can be vertically incident on the light guide plate 200, which can reduce light loss; in addition, according to the principle that the hypotenuse of a right triangle is the longest, under the premise of having the same thickness of the light guide plate 200, the area of ​​the light incident surface 201 of the light guide plate 200 in this embodiment is larger, which can improve the light energy utilization rate of the light bar 320; when realizing the lightweight design of the machine model, only the thickness of the light guide plate 200 can be thinned without adjusting the size of the diaphragm, so the reliability of the backlight module can be guaranteed; by setting the mounting member 310 and the back plate 100 as a split structure, interference between the light guide plate 200 and the light bar assembly 300 can be avoided when assembling the backlight module, thereby improving the yield rate of the backlight module.

[0052] Figure 3 FIG. 3 shows a schematic structural diagram of the light bar 320 provided in this embodiment. Figure 3 Combined with Figure 2 As shown, the light bar 320 is an LED light bar. The LED light bar includes a circuit board 321 and a plurality of LED lamps 322 spaced along the length of the circuit board 321. Each LED lamp 322 is provided with a light emitting surface 3221. Optionally, the circuit board 321 may be an FPC board or a PCB board. It should be noted that the FPC board, PCB board, and LED lamps 322 are all prior art, and the specific structures and operating principles of the FPC board, PCB board, and LED lamps 322 are not further described in this embodiment.

[0053] Optionally, the circuit board 321 includes a first mounting surface 3211 and a second mounting surface 3212 that are opposed to each other. The first mounting surface 3211 is used to mount the LED lamp 322. The mounting member 310 is provided with a third mounting surface 3111, and the second mounting surface 3212 is connected to the third mounting surface 3111. Furthermore, optionally, the third mounting surface 3111 is parallel to the second mounting surface 3212 to increase the contact area between them and improve the stability of the connection. In this embodiment, the LED lamp 322 has a cubic structure with a rectangular cross-section. The surface of the LED lamp 322 facing away from the circuit board 321 forms the aforementioned light-emitting surface 3221.

[0054] In this embodiment, the angle between the light incident surface 201 and the horizontal plane is 30° to 90°. For example, the angle between the light incident surface 201 and the horizontal plane can be 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, etc. Designers can adjust the inclination angle of the light incident surface 201 relative to the horizontal plane based on the thickness of the light guide plate 200 and the size of the LED lamp 322, and this embodiment does not limit this.

[0055] Optionally, the mounting member 310 and the back plate 100 are detachably connected to facilitate assembly, and when a failure occurs in the backlight module, the mounting member 310 and the back plate 100 can be easily disassembled.

[0056] To achieve a detachable connection between the mounting member 310 and the back plate 100, as shown in FIG. Figure 2 As shown, the mounting member 310 includes a mounting portion 311 and an inserting portion 312 connected to each other. The third mounting surface 3111 is provided on the mounting portion 311. The back panel 100 is provided with an inserting slot 102, and the inserting portion 312 is plugged into the inserting slot 102. By providing the inserting slot 102 and the inserting portion 312 on the back panel 100 and the inserting portion 312, respectively, which can be plugged into and out of each other, the mounting member 310 and the back panel 100 can be easily assembled and disassembled. When assembling the backlight module, the light bar 320 can be first installed on the mounting portion 311, and then the inserting portion 312 of the mounting member 310 can be aligned with the inserting slot 102 on the back panel 100 and inserted, which is convenient and quick. This arrangement can also avoid the phenomenon of mutual interference and damage between the light guide plate 200 and the light bar 320 when the mounting member 310 and the back panel 100 are assembled after the mounting member 310 and the back panel 100 are assembled, thereby ensuring the yield rate of the backlight module.

[0057] Of course, in other embodiments, the plug-in slot 102 can also be set on the mounting member 310, and the plug-in portion 312 can be set on the back panel 100, which can also achieve the above-mentioned effect. However, considering that the thickness of the mounting member 310 is relatively small, if the plug-in slot 102 is opened on the mounting member 310, it will affect the structural strength of the mounting member 310, and thus affect the strength of the entire backlight module. Therefore, it is preferred to set the plug-in slot 102 on the back panel 100 and set the plug-in portion 312 on the mounting member 310.

[0058] Figure 4 FIG. 1 shows a schematic top view of the back plate 100 and the light guide plate 200 provided in this embodiment. Figure 5 FIG. 3 shows a schematic structural diagram of the light bar assembly 300 provided in this embodiment. Figure 4-Figure 5 Combined with Figure 2 As shown, the plug-in portion 312 includes at least two plug-in protrusions 3121 spaced apart along the length direction of the mounting portion 311, each plug-in protrusion 3121 corresponds to a plug-in slot 102, and multiple plug-in protrusions 3121 are plugged into multiple plug-in slots 102 one by one to further improve the stability of the connection between the mounting member 310 and the backplane 100; and this design can also save the material used for the mounting member 310 and reduce material costs.

[0059] Optionally, an elastic member 400 is provided between the insertion slot 102 and the insertion protrusion 3121. The provision of the elastic member 400 allows, on the one hand, the insertion protrusion 3121 and the insertion slot 102 to achieve an interference fit due to the elastic action of the elastic member 400, thereby ensuring a secure connection between the two. Furthermore, when the insertion protrusion 3121 is inserted into the insertion slot 102, the elastic action of the elastic member 400 can be used to fine-tune the insertion position, thereby ensuring that each insertion protrusion 3121 can be inserted into the corresponding insertion slot 102. In this embodiment, the elastic member 400 can be made of a rubber sleeve, which has a strong elastic force and is low in cost.

[0060] In this embodiment, the elastic member 400 is bonded to the insertion groove 102 to achieve a stable connection between the elastic member 400 and the back plate 100. Of course, in other embodiments, an elastic member 400 can be bonded to each insertion protrusion 3121 to achieve the above effect.

[0061] Continue as Figure 2As shown, the light incident surface 201 on the light guide plate 200 gradually slopes downward as it approaches the light bar assembly 300. That is, the top surface of the light guide plate 200 is shorter than the bottom surface of the light guide plate 200, the light incident surface 201 is positioned diagonally upward toward the back panel 100, and the light bar 320 is positioned diagonally above the light guide plate 200. In this embodiment, the mounting portion 311 and the plug-in portion 312 are positioned at an angle. The plug-in portion 312 extends along the thickness of the back panel 100 and is inserted into the plug-in slot 102 from the side of the back panel 100 toward the accommodating space 101. The mounting portion 311 is positioned diagonally above the light guide plate 200, and the mounting portion 311 is tilted at the same angle relative to the horizontal plane as the light incident surface 201.

[0062] To facilitate the processing of the mounting member 310, the mounting portion 311 and the plug-in portion 312 can be configured as an integrated structure, eliminating the need for assembly between the two. This can improve the assembly efficiency of the backlight module to a certain extent and prevent breakage at the connection between the two. Of course, this embodiment does not limit the connection method between the mounting portion 311 and the plug-in portion 312. The plug-in portion 312 can also be connected to the mounting portion 311 by bolts, clamping, plugging, bonding, etc., and the above-mentioned effects can also be achieved.

[0063] Optionally, the mounting member 310 is made of aluminum or stainless steel, which is the same material as the back plate 100 , and can serve as a part of the back plate 100 .

[0064] Example 2

[0065] This embodiment provides a backlight module. The specific structure of the backlight module is substantially the same as that of the backlight module in the first embodiment, except that the structure of the mounting member 310 is different.

[0066] Figure 6 FIG. 1 shows a schematic cross-sectional structural diagram of the backlight module provided in this embodiment. Figure 7 FIG. 1 shows a schematic top view of the back plate 100 and the light guide plate 200 provided in this embodiment. Figure 8 FIG. 3 shows a schematic structural diagram of a light bar assembly 300 provided in this embodiment. Figure 9 FIG. 3 shows a side view of the light bar assembly 300 provided in this embodiment. Figure 6-Figure 9 As shown, in this embodiment, the insertion slot 102 is a strip-shaped slot, and the side of the insertion portion 312 facing away from the mounting portion 311 is directly inserted into the insertion slot 102. This arrangement is simple in structure, easy to process, and can facilitate the insertion and assembly between the light bar assembly 300 and the back plate 100.

[0067] Alternatively, as Figure 6 and Figure 9As shown, a limiting portion 313 capable of abutting against the back panel 100 is provided between the mounting portion 311 and the plug-in portion 312. By providing the limiting portion 313, the depth of the plug-in portion 312 inserted into the plug-in slot 102 can be limited, thereby preventing the plug-in portion 312 from being inserted too deeply, resulting in an unstable connection between the mounting member 310 and the back panel 100, and preventing the plug-in portion 312 from being inserted too deeply, resulting in the light-emitting surface 3221 of the light bar 320 not being directly aligned with the light-incident surface 201 of the light guide plate 200.

[0068] Example 3

[0069] This embodiment provides a backlight module. The specific structure of the backlight module is substantially the same as that of the backlight module in the first embodiment, except that the connection method between the mounting member 310 and the back plate 100 is different.

[0070] Figure 10 FIG. 1 shows a cross-sectional structural diagram of the backlight module provided in this embodiment. Figure 10 As shown, in this embodiment, the back panel 100 includes a bottom panel 110 and side panels 120 surrounding the bottom panel 110. The bottom panel 110 and the side panels 120 enclose the aforementioned accommodation space 101. The mounting member 310 is disposed on the side of the side panel 120 facing the accommodation space 101. This design can be directly improved upon the prior art back panel 100 without requiring redesign or reprocessing of the back panel 100, thus simplifying the processing and reducing design and processing costs.

[0071] Optionally, the mounting member 310 is adhered to the side panel 120 , which provides a stable connection and facilitates operation.

[0072] In this embodiment, the mounting member 310 is a triangular prism, one of the side surfaces of the mounting member 310 forms a third mounting surface 3111, and the other side surface of the mounting member 310 is connected to the side panel 120. Of course, in other embodiments, the mounting member 310 can also be configured as other shapes, as long as the mounting member 310 includes two surfaces at an angle, one of which is connected to the side panel 120, and the other surface forms a third mounting surface 3111 parallel to the second mounting surface 3212.

[0073] Optionally, the mounting member 310 is a hollow structure, which can reduce the material used for the mounting member 310 and lower the material cost. On the other hand, it can also reduce the weight of the entire backlight module to a certain extent and achieve its lightweight design.

[0074] Example 4

[0075] This embodiment provides a backlight module. The specific structure of the backlight module is substantially the same as that of the backlight module in the third embodiment, except that the structure of the light guide plate 200 is different.

[0076] Figure 11 FIG. 1 shows a cross-sectional structural diagram of the backlight module provided in this embodiment. Figure 11 As shown, in this embodiment, the light-incident surface 201 of the light guide plate 200 is provided with a supporting protrusion 202, which abuts against the light-emitting surface 3221 of the light bar assembly 300. This design can limit the position of the light bar 320, preventing the light bar 320 from shifting relative to the mounting member 310 after prolonged use of the backlight module, thereby affecting the display effect of the display device.

[0077] It should be noted that the connection method between the mounting member 310 and the back plate 100 in this embodiment can adopt the connection method in the first embodiment, the second embodiment or the third embodiment, which is not limited here.

[0078] Example 5

[0079] This embodiment provides a backlight module. The specific structure of the backlight module is substantially the same as that of the backlight module in the first embodiment, except that the structure of the mounting member 310 is different.

[0080] Figure 12 FIG. 1 shows a cross-sectional structural diagram of the backlight module provided in this embodiment. Figure 12 As shown, the mounting member 310 includes a mounting portion 311 and a plug-in portion 312. The plug-in portion 312 includes a first portion 3122 and a second portion 3123 that are vertically connected. The first portion 3122 is plugged into the plug-in slot 102 of the back panel 100. The mounting portion 311 is in the shape of a triangular prism and is arranged at the angle formed by the first portion 3122 and the second portion 3123. Two side surfaces of the triangular prism-shaped mounting portion 311 are respectively connected to the first portion 3122 and the second portion 3123, and the other side surface forms a third mounting surface 3111.

[0081] Optionally, the plug portion 312 can be made of aluminum or stainless steel, the same material as the back panel 100, and can serve as a part of the back panel 100. The mounting portion 311 is made of polycarbonate (PC) or polymethyl methacrylate (PMMA), both of which have the advantages of high strength, ease of processing, and light weight. In this embodiment, the mounting portion 311 can be connected to the plug portion 312 by bonding or by insert injection molding.

[0082] It should be noted that the plug-in connection method between the first portion 3122 and the backplane 100 is the same as the connection method in the first or second embodiment, and will not be described in detail in this embodiment.

[0083] Example 6

[0084] This embodiment provides a backlight module. The specific structure of the backlight module is substantially the same as that of the backlight module in the first embodiment, except that the structures of the mounting member 310 and the LED lamp 322 are different.

[0085] Figure 13 FIG. 1 shows a cross-sectional structural diagram of the backlight module provided in this embodiment. Figure 13 As shown, in this embodiment, the cross-sectional shape of the LED lamp 322 is a trapezoid, one of the inclined surfaces of the LED lamp 322 forms a light-emitting surface 3221, and one of the two parallel surfaces on the trapezoid is connected to the first mounting surface 3211; the mounting portion 311 is vertically connected to the plug-in portion 312, and the mounting portion 311 forms a third mounting surface 3111 on the side facing the back panel 100, and the third mounting surface 3111 is parallel to the horizontal plane.

[0086] In this embodiment, the connection method between the plug-in portion 312 and the backplane 100 can adopt the connection method in the first embodiment or the connection method in the second embodiment, which will not be described in detail in this embodiment.

[0087] It should be noted that if Figure 13 Combined with Figure 2 As shown, in this embodiment, since the cross-section of the LED lamp 322 is trapezoidal, the structure and internal circuit of the LED lamp 322 need to be improved during manufacturing, which will increase the design and manufacturing costs of the light bar 320. However, this arrangement can simplify the structure of the mounting member 310 and reduce the manufacturing cost of the mounting member 310. In contrast, the cross-section of the LED lamp 322 in the first embodiment is rectangular, so it can directly adopt the LED lamp 322 of the prior art, which can reduce the manufacturing cost of the light bar 320 to a certain extent.

[0088] Example 7

[0089] This embodiment provides a backlight module. The specific structure of the backlight module is substantially the same as that of the backlight module in the sixth embodiment, except that the structure of the mounting member 310 is different.

[0090] Figure 14 FIG. 1 shows a cross-sectional structural diagram of the backlight module provided in this embodiment. Figure 14 As shown, in this embodiment, the light incident surface 201 of the light guide plate 200 gradually tilts upward as it approaches the light bar assembly 300. In other words, the top surface of the light guide plate 200 is longer than the bottom surface of the light guide plate 200, the light incident surface 201 is arranged obliquely downward of the back plate 100, and the light bar 320 is located obliquely downward of the light guide plate 200.

[0091] The specific structure of the LED lamp 322 in this embodiment is the same as the specific structure of the LED lamp 322 in the sixth embodiment, and the specific structure of the LED lamp 322 in this embodiment will not be repeated.

[0092] In this embodiment, the connection method between the plug-in portion 312 and the backplane 100 can adopt the connection method in the first embodiment or the connection method in the second embodiment, which will not be described in detail in this embodiment.

[0093] In this embodiment, the mounting member 310 includes a mounting portion 311, an intermediate connecting portion 314, and an inserting portion 312. A third mounting surface 3111 is provided on the mounting portion 311. The inserting portion 312 is inserted into the inserting slot 102 from the bottom of the back panel 100. The ends of the intermediate connecting portion 314 are connected to the mounting portion 311 and the inserting portion 312, respectively. The mounting portion 311, intermediate connecting portion 314, and inserting portion 312 are sequentially connected to form a generally U-shaped structure. This arrangement facilitates assembly of the light bar assembly 300 with the back panel 100. Ample space is provided between the light guide plate 200 and the mounting portion 311, preventing interference between the light guide plate 200 and the light bar 320 during assembly. That is, when assembling the backlight module, the light bar 320 can be first assembled on the mounting member 310 to form the light bar assembly 300, and then the entire light bar assembly 300 can be assembled on the back panel 100; or the mounting member 310 can be first plugged into the back panel 100, and then the light bar 320 can be assembled on the mounting member 310.

[0094] Example 8

[0095] This embodiment provides a display device, which may be, but is not limited to, a liquid crystal display (LCD), an LCD television, an advertising machine, or the like. Specifically, the display device includes a liquid crystal panel and a backlight module, wherein the backlight module is used to support the LCD panel and provide a backlight source for the LCD panel. The backlight module can adopt any of the backlight modules described in the above embodiments. By using such backlight modules, a thinner design of the device can be achieved, the light energy utilization rate of the light bar 320 can be reduced, and the reliability of the entire display device can be ensured.

[0096] The above embodiments merely illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may also undergo various changes and modifications, which fall within the scope of the present invention to be protected.

Claims

1. A backlight module, characterized in that: include: A back plate (100), wherein an accommodating space (101) is formed on the back plate (100); A light guide plate (200) is disposed in the accommodating space (101), and a light incident surface (201) inclined relative to a horizontal plane is provided on the light guide plate (200); A light bar assembly (300) comprises a mounting member (310) and a light bar (320) arranged on the mounting member (310); the light bar (320) is provided with a light emitting surface (3221); the light emitting surface (3221) is arranged opposite to and parallel to the light incident surface (201); the light incident surface (201) is provided with a supporting protrusion (202) that abuts against the light emitting surface (3221); and the mounting member (310) is provided separately from the back panel (100).

2. The backlight module according to claim 1, wherein: The mounting member (310) comprises a mounting portion (311) and a plug-in portion (312) connected to each other, the mounting portion (311) being used to mount the light bar (320), a plug-in slot (102) being provided on the back panel (100), and the plug-in portion (312) being plugged into the plug-in slot (102).

3. The backlight module according to claim 2, wherein: The plug-in portion (312) comprises at least two plug-in protrusions (3121) spaced apart along the length direction of the mounting portion (311), and each of the plug-in protrusions (3121) corresponds to one of the plug-in slots (102); or The plug-in slot (102) is a strip-shaped slot, and the plug-in portion (312) is plugged into the plug-in slot (102) at a side facing away from the mounting portion (311).

4. The backlight module according to claim 3, wherein: A limiting portion (313) capable of abutting against the back plate (100) is provided between the mounting portion (311) and the plug-in portion (312).

5. The backlight module according to claim 2, wherein: An elastic member (400) is provided between the plug-in slot (102) and the plug-in portion (312).

6. The backlight module according to claim 1, wherein: The mounting member (310) is adhered to the back plate (100).

7. The backlight module according to any one of claims 1 to 6, characterized in that: The light incident surface (201) on the light guide plate (200) gradually tilts downward in a direction approaching the light bar assembly (300); or The light incident surface (201) on the light guide plate (200) gradually tilts upward in a direction approaching the light bar assembly (300).

8. The backlight module according to any one of claims 1 to 6, wherein: The angle between the light incident surface (201) and the horizontal plane is 30° to 90°.

9. A display device, characterized in that: The invention comprises a liquid crystal panel and a backlight module according to any one of claims 1 to 8, wherein the backlight module is used for carrying the liquid crystal panel and providing a backlight source for the liquid crystal panel.

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