CN210835522U - Backlight modules and display equipment - Google Patents

Abstract

The present disclosure relates to a backlight module and a display device. The backlight module includes: a plurality of optical function film layers; a fixing part, located on the back side of the plurality of optical function film layers; a plug-in card part, including an installation part and a clamping part, the installation part is fixedly connected with the fixing part, and the clamping part It is used for snap connection with the circuit board between the inserting fixture and the inserting card.

Description

Backlight modules and display equipment

technical field

The present disclosure relates to the field of display technology, and in particular, to a backlight module and a display device.

Background technique

In the assembling process of the related art liquid crystal display device, after the assembly process of the front liquid crystal panel body is completed, the module needs to be turned over to fix the screen driving board of the liquid crystal panel on the back of the module. The inversion operation is not only cumbersome and laborious, but also easily leads to damage to the liquid crystal panel during the inversion process. Such problems are particularly prominent in the assembly and production of large-sized products such as televisions.

Utility model content

According to an aspect of the embodiments of the present disclosure, a backlight module is provided, including:

Multiple optical functional film layers;

a fixing member, located on the back side of the plurality of optical functional film layers;

An insertion card includes an installation part and a clamping part, the installation part is fixedly connected with the fixing part, and the clamping part is used for connecting with a circuit board inserted between the fixing part and the insertion card Card access.

In some embodiments, the fixing member includes a first plate portion and a second plate portion on the backside of the first plate portion.

In some embodiments, at least one of the plug-in cards is a first plug-in card, and the first plug-in card is used to fix the screen driver board of the liquid crystal panel to the back of the first board portion; The engaging portion of the first inserting card has a card slot for engaging with the screen driving board.

In some embodiments, the first insertion card further includes an insertion guide portion located on a side of the engaging portion away from the mounting portion and having a guiding slope.

In some embodiments, there are at least two plug-in cards, and at least one of the plug-in cards is a second plug-in card substantially flush with the second plate portion, and the second plug-in card The clip is used to fix the main board of the display device at a position substantially parallel to the second board part; the clip part of the second plug-in clip includes a pair of hooks arranged oppositely and in opposite clip directions , and a pair of the hooks is used to be connected with the motherboard.

In some embodiments, the fixing member further includes a connecting portion connecting the first plate portion and the second plate portion, and the first plate portion, the connecting portion and the second plate portion constitute a a guide rail groove; the installation part of the plug-in clip is assembled in the guide rail groove with a gap and is fixedly connected with the second plate part by a fastener.

In some embodiments, the second plate portion is parallel to the light-emitting surface of the backlight module, the plane where the first plate portion is located intersects with the plane where the second plate portion is located, and the rail groove has a cross-section of wedge.

In some embodiments, the backlight module further includes: a back plate located on the back side of the plurality of optical function film layers; the plurality of optical function film layers includes a reflective sheet, the fixing member and the plug-in card located between the reflection sheet and the back plate.

In some embodiments, the reflective sheet includes a flat portion and a folded portion located around the flat portion and folded toward the light-emitting surface of the backlight module; the fixing member and the plug-in card are located at the between the folded portion of the reflective sheet and the back plate.

In some embodiments, the backlight module further includes: a plurality of light bars located between the reflective sheet and the back plate, and the light-emitting chips of the light bars penetrate through the holes opened on the reflective sheet;

The second plate portion is connected to the connecting portion in a T-shape, and the second plate portion has a first notch with an opening facing away from the inserting clip for positioning the light bar.

In some embodiments, the backplane is a planar backplane.

In some embodiments, the backlight module further includes a bracket, the bracket includes a left side portion and a right side portion, the fixing member is disposed on the ground side and is connected with the left side portion and the right side portion The connection is fixed by means of fasteners.

In some embodiments, the fixing member further includes a bending portion connected to the first plate portion and folded toward the end side of the backlight module, the bending portion having a flexible circuit connection for avoiding the liquid crystal panel the second notch of the board.

In some embodiments, the backlight module further includes: a backplane located on the backside of the plurality of optical function film layers, and the fixing member is located on the backside of the backplane.

According to another aspect of the embodiments of the present disclosure, there is provided a display device including the backlight module according to any of the foregoing technical solutions.

By adopting the technical solutions of the foregoing embodiments of the present disclosure, the assembly efficiency and assembly yield in the production process of the display device can be improved.

Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of embodiments of the present disclosure with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, which form a part of the specification, illustrate embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure.

The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, wherein:

1a is a schematic cross-sectional view of a backlight module of a display module according to an embodiment of the disclosure;

1b is a schematic cross-sectional view of a backlight module of a display module according to another embodiment of the disclosure;

2 is an exploded schematic diagram of a display module according to an embodiment of the present disclosure;

3 is a schematic diagram of the assembly of a fixing member, a plug-in card member and a circuit board according to an embodiment of the present disclosure;

Fig. 4a is the enlarged schematic diagram at A in Fig. 3;

Figure 4b is a schematic diagram of the first plug-in card in Figure 3;

Fig. 5a is the enlarged schematic diagram at B in Fig. 3;

FIG. 5b is a schematic diagram of the second insertion card in FIG. 3 .

FIG. 6 is a flowchart of an assembling method of a backlight module according to an embodiment of the disclosure.

It should be understood that the dimensions of the various parts shown in the drawings are not to actual scale. Furthermore, the same or similar reference numerals denote the same or similar components.

Detailed ways

Various embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The descriptions of the embodiments are illustrative only and in no way limit the disclosure, its application or use in any way. The present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that unless specifically stated otherwise, the relative arrangement of components and steps set forth in these embodiments are to be construed as illustrative only and not as limiting.

As used in this disclosure, "first," "second," and similar words do not denote any order, quantity, or importance, but are merely used to distinguish the different parts. Words like "including" mean that the elements preceding the word cover the elements listed after the word, and do not exclude the possibility that other elements are also covered. "Up", "Down", "Left", "Right", etc. are only used to represent the relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

In the present disclosure, when a particular element is described as being between a first element and a second element, intervening elements may or may not be present between the particular element and the first element or the second element.

All terms (including technical or scientific terms) used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in, for example, general-purpose dictionaries should be construed to have meanings consistent with their meanings in the context of the related art, and not to be construed in an idealized or highly formalized sense, unless explicitly stated herein. Defined like this.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification.

Embodiments of the present disclosure provide a backlight module, an assembling method thereof, and a display device, so as to improve assembly efficiency and assembly yield during the production process of the display device.

In the embodiment of the present disclosure, the "back side" of a component (or assembly) refers to the side of the component away from the viewer when the display device is in a normal use state, and correspondingly, the "front side" of the component refers to the component being viewed close to side of the person. For display devices with screens that are perpendicular to the horizontal plane or at a certain angle in use, such as televisions or picture screens, the "ground side" of a component (or component) refers to the side closer to the ground, and the "sky side" refers to the side that is closer to the ground. The ground side is the side farther from the ground, "left side" refers to the side closer to the viewer's left hand side, and "right side" refers to the side closer to the viewer's right hand side. It should be noted that the above-mentioned "ground side", "sky side", "left side" and "right side" are only the position information when the display device is kept in one use state. For a display device with dual screen and vertical screen, when the use state changes, for example, the horizontal screen state is converted into the vertical screen state, the position of each component will also change accordingly.

As shown in FIG. 1a, an embodiment of the present disclosure provides a backlight module 7, including:

a plurality of optical functional film layers 3;

The fixing member 1 is located on the back side of the plurality of optical functional film layers 3;

The plug-in card 2 includes an installation part 21 and a clamping part 22. The installation part 21 is fixedly connected with the fixing part 1, and the clamping part 22 is used to insert the circuit board (eg The screen driving board 83) of the liquid crystal panel 8 shown in the figure is snapped.

The liquid crystal panel 8 of the display device includes a body 81 , at least one screen driving board 83 , and a flexible circuit connecting board 82 connecting the body 81 and the screen driving board 83 . Wherein: the body 81 is a liquid crystal cell structure, which is used for screen display; the screen driving board 83 is also called a logic board, which is used to output driving signals to the body 81, such as data suitable for the body 81 and the data signals of the gate drive IC, control signal, clock signal, etc.; the flexible circuit connecting board 82 is flexible and bendable, and is used for transmitting signals between the screen driving board 83 and the main body 81 .

The specific type of the backlight module 7 is not limited, for example, it can be a direct-type backlight module as shown in FIG. 1a or an edge-type backlight module as shown in FIG. 1b.

As shown in FIG. 1 a , in some embodiments, the backlight module 7 is a direct type backlight module, and the light bar 4 serving as a light source is disposed on the backside of the plurality of optical functional film layers 3 . The plurality of optical functional film layers 3 are respectively a reflective sheet 31 , a diffuser plate 32 and at least one optical film 33 arranged in sequence from the back to the front. Wherein, the light-emitting chips 40 (such as light-emitting diodes) of the light bar 4 pass through the holes opened on the reflection sheet 31 . The reflection sheet 31 and the diffuser plate 32 are spaced apart from each other.

As shown in FIG. 1b, in other embodiments, the backlight module 7 is an edge-lit backlight module, and the plurality of optical functional film layers 3 are respectively a reflective sheet 31, a light guide plate 34 and at least a An optical film 33 , the light bar 4 serving as a light source is disposed on the end side of the light guide plate 34 , and the light-emitting chip of the light bar 4 faces the end face of the light guide plate 34 .

In the embodiment shown in FIGS. 1 a and 1 b of the present disclosure, the backlight module 7 further includes a backplane (the backplane 6b in FIG. 1a and the backplane 6a in FIG. 1b ) and a frame 5 . The backplane and the frame 5 are fixedly connected to support and limit the optical components accommodated therein. After the liquid crystal panel 8 is assembled with the backlight module 7 , the frame 5 also plays a role of supporting and limiting the liquid crystal panel 8 . In these embodiments of the present disclosure, the frame 5 may be made of materials such as metal or plastic.

In some embodiments of the edge-lit backlight module or the direct-lit backlight module of the present disclosure, the fixing member and the plug-in card member are located on the back side of the backplane. For example, as shown in FIG. 1b, the fixing member 1 is fixed to the back plate 6a, in addition, the fixing member can also be fixed to the frame through the extended bending portion. A display device including such a backlight module 7 also needs to be provided with a rear case (not shown in FIG. 1 b ) to cover components such as a circuit board.

In some embodiments of the direct type backlight module of the present disclosure, as shown in FIG. 1a, the fixing member 1 and the plug-in card 2 are located between the reflective sheet 31 and the back plate 6b, and the fixing member 1 passes through the extended bending portion It is fixed on the frame 5, and at this time, the back plate 6b of the backlight module 7 can simultaneously serve as the rear shell of the display device. The backplane 6b may be a flat backplane, such as a transparent, opaque, or glass backplane with a certain decorative effect. A display device including such a backlight module 7 does not need to be provided with an additional back cover, which not only costs less, but also has a slimmer and more aesthetically pleasing appearance.

In the embodiment of the present disclosure, the circuit board may be the screen driving board 83 of the liquid crystal panel 8 as shown in FIG. 1a and FIG. 1b, in addition, the circuit board may also be the main board of the display device or the like. Taking the display device as a TV as an example, the functions of the TV mainboard can include: processing key signals, responding to remote control signals, directly or indirectly controlling the backlight, receiving various video signals, converting images into low-voltage differential signals and sending them to the LCD panel. The screen driver board, the sound signal is output to the speaker, etc.

In the embodiment of the present disclosure, the installation positions of the fixing member 1 and the plug-in card member 2 can be designed according to the required fixing position of the circuit board, so that the circuit board can be inserted into the fixing member 1 and the plug-in card member from the edge of the backlight module. between 2. Taking the display device as an LCD TV as an example, the fixing member 1 and the plug-in card 2 can be arranged at a position close to the edge of the ground side of the backlight module 7, so as to facilitate the insertion of the circuit board from the ground side.

In the assembling process of the liquid crystal display device of the related art, after the assembly process of the front liquid crystal panel body is completed, the module needs to be turned over to fix the screen driving board of the liquid crystal panel with screws on the back of the module. This turning operation is not only cumbersome and laborious, but also Moreover, it is easy to cause the liquid crystal panel to be damaged during the turning process. In addition, the motherboard of the liquid crystal display device in the related art is also fixed on the back of the module with screws, and there are similar technical problems.

By adopting the design of the embodiments of the present disclosure, in the process of assembling the display device, the assembler can fix the circuit board such as the screen driver board of the liquid crystal panel or the main board of the display device without turning the module over, and directly connect the circuit through the plug-in card. The board can be inserted and fixed, which not only saves time and effort, but also avoids damage to the module caused by the overturning operation, thereby improving the assembly efficiency and assembly yield.

For example, after assembling the body 81 of the liquid crystal panel 8 on the front side of the backlight module 7, without turning the module over, the screen driving board 83 of the liquid crystal panel 8 can be directly folded to the back side and inserted into the fixing member 1 and the plug-in card 2 In between, it can be fixed by inserting the card 2. Compared with the related art, it not only simplifies the assembly operation process, improves the assembly efficiency, but also avoids the damage of the liquid crystal panel caused by the module inversion operation, thereby improving the assembly yield.

In the embodiments shown in FIGS. 1 a and 1 b of the present disclosure, the backlight module 7 includes a frame 5 . As shown in Fig. 1a, the fixing member 1 can be fixed to the frame 5 through the extended bending portion. As shown in FIG. 1b, in this embodiment, the fixing member 1 is fixed to the back of the back plate 6a.

As shown in FIG. 2 and FIG. 3 , it is another structure of a display device using a direct type backlight module. The backlight module includes a bracket 50. The bracket 50 includes a sky side edge 50a, a left edge part 50b and a right edge part 50c. The fixing member 1 is arranged on the ground side and is connected with the left edge part 50b and the right edge part 50c. 50c is fixedly connected by fasteners (not shown in the figure). The structure of the backlight module of this embodiment does not include a frame, but the frame-shaped structure formed after the bracket 50 is fixedly connected with the fixing member 1 can play the role of the aforementioned frame 5 . In addition, the exploded view of the display device shown in FIG. 2 also shows a front frame 6 fixedly connected with the bracket and the fixing member 1 for fixing the liquid crystal panel.

As shown in FIGS. 4 a , 4 b , 5 a and 5 b , in an embodiment of the present disclosure, the fixing member 1 includes a first plate portion 11 and a second plate portion 12 located on the back side of the first plate portion 11 . In addition, the fixing member 1 may further include a connecting portion 13 connecting the first plate portion 11 and the second plate portion 12 . In this embodiment, the first plate portion 11 , the connecting portion 13 and the second plate portion 12 form a guide rail groove 14 ; the mounting portion 21 of the plug-in card 2 is assembled in the guide rail groove 14 with a gap and is connected to the second plate through fasteners. The part 12 is fixedly connected, and the clamping part 22 is used to be clamped with a circuit board (such as the screen driving board 83 or the main board 9 ).

The plug-in card 2 is slidably assembled in the guide rail groove 14 , which facilitates the installation and positioning of the plug-in card 2 , thereby improving the precision of the circuit board and the plug-in card 2 in the snap-fit assembly. In addition, the mounting portion 21 of the plug-in clip 2 can also be directly fixed to the second plate portion 12 by a fastener.

The second board portion 12 can have a plurality of screw holes for fixing the plug-in card 2 along the length direction of the guide rail groove 14, so that some screw holes can be selected according to the size and setting position of the circuit board to install a certain number of plug-ins Card 2, so that the backlight module can be applied to display devices of various specifications and has a wide application range.

As shown in FIG. 4a and FIG. 4b, in one embodiment of the present disclosure, at least one plug-in card member 2 is a first plug-in card member 2a in elastic contact with the first board portion 11, and is used for connecting the screen of the liquid crystal panel The driving board 83 is fixed on the back of the first board portion 11 ; the engaging portion 22 of the first inserting card 2 a has a card slot 221 for engaging with the screen driving board 83 . In addition, the first inserting card 2a may further include an inserting guide portion 23 located on the side of the engaging portion 22 away from the mounting portion 21 and having a guiding slope, so as to facilitate the insertion of the panel driving board 83 .

In addition, as shown in FIG. 5a and FIG. 5b, in this embodiment, there is also at least one plug-in card part 2 which is a second plug-in card part 2b which is substantially flat with the second plate part 12, and is used for connecting the display device to the display device. The main board 9 is fixed at a position substantially parallel to the second board portion 12 ; the engaging portion 22 of the second inserting clip 2b includes a pair of engaging hooks 222 disposed opposite to each other and in opposite engaging directions. The pair of engaging hooks 222 are used for Connect with the motherboard 9. That is, the screen driving board 83 of the liquid crystal panel and the main board 9 of the display device are respectively fixed on different planes, and the screen driving board 83 and the main board are connected by a flexible circuit board.

It should be noted that in the present disclosure, the word "approximately" is relative to the situation of "absolutely ideal". Since processing, assembly errors and shape details need to be considered, "approximately" can be understood as within a certain error range Inside.

By adopting the solution design of this embodiment, the back space of the direct-type backlight module can be effectively utilized, making the product structure more compact.

In an embodiment of the present disclosure, the backlight module is a direct-type backlight module, the back plate is located on the back side of the reflective sheet, and the fixing member and the plug-in card are located between the reflective sheet and the back plate, so that the screen driver board can be connected Both the 83 and the main board are fixed between the reflective sheet and the backplane, so that the display device does not need to be provided with an additional backshell for protecting the circuit board, and the overall appearance is more beautiful. As shown in FIG. 3 and FIG. 4a, the reflective sheet 31 includes a flat portion 31a and a folded portion 31b located around the flat portion 31a and folded toward the light-emitting surface of the backlight module. The fixing member 1 and the plug-in card 2 are located on the reflective sheet. Between the folded portion 31b of 31 and the back plate (the back plate is not shown in the figure), the second plate portion 12 of the fixing member 1 is parallel to the light-emitting surface of the backlight module, the plane where the first plate portion 11 is located is parallel to the second plate portion 12 of the The planes where the plate portion 12 is located intersect, so the cross section of the guide groove 14 is wedge-shaped. In this embodiment, the fixing member 1 can play the role of supporting the reflective sheet 31 and can be in contact with the back plate, and the fixing member 1 and the plug-in card 2 are arranged between the folded portion 31b of the reflective sheet 31 and the back plate , the back space around the reflective sheet 31 can be effectively used, which is more conducive to the slim design of the display device.

As shown in FIG. 4 a , the second plate portion 12 of the fixing member 1 is connected to the connecting portion 13 in a T-shape, and the second plate portion 12 has a first notch facing away from the insertion card 2 for positioning the light bar 40 121. The light bar 4 is positioned by the first gap 121 of the second plate portion 12 of the fixing member 1 , which facilitates the assembly of the light bar 4 , and has a simple structure, which is beneficial to reduce production costs.

As shown in FIG. 4a , the fixing member 1 further includes a bending portion 15 connected to the first plate portion 11 and folded toward the end side of the backlight module. After the fixing member 1 is fixedly connected with the aforementioned bracket, the bending portion 15 can limit the structure of the optical function film layer and the like, and can also play a supporting role for the body of the liquid crystal panel. In addition, the bent portion 15 has a second notch 151 for avoiding the flexible circuit connection board 82 of the liquid crystal panel. Designing the second notch 151 in the bending portion 15 can prevent the flexible circuit connecting board 82 from protruding from the surface of the bending portion 15 , thereby effectively reducing the damage to the flexible circuit connecting board 82 during the assembly process.

In the embodiment of the present disclosure, the specific numbers of the first plug-in card parts 2a and the second plug-in card parts 2b are not limited, and can be determined according to the number and specifications of circuit boards. The fixing part can be made of metal material, and the plug-in card can be made of a plastic material with good elasticity such as polycarbonate.

Referring to FIG. 1a and FIG. 1b, an embodiment of the present disclosure further provides a display device including the backlight module 7 according to any of the foregoing embodiments. In addition, the display device also includes a liquid crystal panel 8 located on the front side of the backlight module 7 , and the screen driving board 83 of the liquid crystal panel 8 is folded to the back side and inserted between the fixing member 1 and the plug-in card member 2 , and is fixed by the plug-in card member 2 . In addition, the main board or other circuit boards of the display device can also be fixed by other similar plug-in cards.

When fixing some circuit boards of the display device, the assembler does not need to turn the module over, and can directly insert and fix the circuit board through the insertion card 2, which saves time and effort, and can avoid the module damage caused by the turning operation. Thus, the assembly efficiency and assembly yield are improved.

The specific product type of the display device is not limited, for example, it can be a television, a picture screen, a monitor, a tablet computer, a notebook computer, and the like. For large-screen display devices such as televisions, the aforementioned beneficial effects are more prominent.

As shown in FIG. 6 , an embodiment of the present disclosure also provides an assembling method of the aforementioned backlight module, including the following steps:

Step S11: Fix the fixing member to the bracket. Wherein, the bracket includes a sky side edge, a left edge part and a right edge part, and the fixing part is arranged on the ground side and is fixedly connected with the left edge part and the right edge part by a fastener.

Step S12: Fix the plug-in card to the fixing member, and the plug-in card is used for fixing the circuit board inserted between the fixing member and the plug-in card. For example, the plurality of first insertion clips and the plurality of second insertion clips in the foregoing embodiments are fixed to the second plate portion of the fixing member by screws.

Step S13: place the backplane on the backside of the fixing member and the plug-in card and fix the backing board with the bracket and the fixing member. For example, the glass backplane is bonded and fixed with the bracket and the fixing piece through the adhesive layer.

After step S13 is completed, each optical component can be assembled on the front side of the backplane in sequence. For example, a light bar, a reflection sheet, a diffuser plate, an optical film, etc. are sequentially assembled on the front side of the glass backplane.

Embodiments of the present disclosure also provide a method for assembling a display device, including the following steps:

Assembling a liquid crystal panel on the front side of the backlight module of the foregoing embodiment;

Under the premise that the backlight module is not turned over, the screen driver board of the liquid crystal panel is inserted between the fixing member of the backlight module and the plug-in card, and the screen driver board is fixed to the fixing member through the plug-in card.

The main board or other circuit boards of the display device can also be fixed by a plug-in card with a similar structure.

It can be seen that in the assembly process of the display device, the module does not need to be turned over, and the circuit board can be directly inserted and fixed on the back side through the insertion card, thereby improving the assembly efficiency and the assembly yield.

While some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art will appreciate that the above examples are provided for illustration only, and are not intended to limit the scope of the present disclosure. Those skilled in the art will appreciate that modifications may be made to the above embodiments without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims (15)

1. a backlight module, is characterized in that, comprises: Multiple optical functional film layers; a fixing member, located on the back side of the plurality of optical functional film layers; An insertion card includes an installation part and a clamping part, the installation part is fixedly connected with the fixing part, and the clamping part is used for connecting with a circuit board inserted between the fixing part and the insertion card Card access. 2 . The backlight module of claim 1 , wherein the fixing member comprises a first plate portion and a second plate portion located on the back side of the first plate portion. 3 . 3 . The backlight module according to claim 2 , wherein at least one of the plug-in cards is a first plug-in card, and the first plug-in card is used to connect the screen driving board of the liquid crystal panel. 4 . fixed on the back of the first plate portion; The engaging portion of the first inserting card has a card slot for engaging with the screen driving board. 4 . The backlight module of claim 3 , wherein the first inserting card further comprises an inserting guide portion located on a side of the engaging portion away from the mounting portion and having a guiding slope. 5 . 5 . The backlight module according to claim 3 , wherein there are at least two plug-in cards, and at least one of the plug-in cards is a second plate substantially flush with the second plate. 6 . An inserting card, the second inserting card is used to fix the main board of the display device at a position substantially parallel to the second board portion; the engaging portion of the second inserting card includes a For the hooks disposed oppositely and in opposite clamping directions, a pair of the hooks is used for being clamped with the motherboard. 6 . The backlight module of claim 2 , wherein the fixing member further comprises a connecting portion connecting the first plate portion and the second plate portion, the first plate portion, the The connecting part and the second plate part form a guide rail groove; The installation part of the plug-in card is gap-fitted in the guide rail groove and fixedly connected with the second plate part by a fastener. 7 . The backlight module according to claim 6 , wherein the second plate portion is parallel to the light-emitting surface of the backlight module, and the plane where the first plate portion is located is the same as the plane where the second plate portion is located. 8 . The planes intersect, and the cross section of the guide groove is wedge-shaped. 8 . The backlight module of claim 7 , further comprising: a backplane located on the backside of the plurality of optical function film layers; 8 . The plurality of optical functional film layers include reflective sheets, and the fixing member and the inserting card member are located between the reflective sheets and the backplane. 9 . The backlight module of claim 8 , wherein the reflection sheet comprises a flat portion and a folded portion located around the flat portion and folded toward the light-emitting surface of the backlight module; 9 . The fixing member and the inserting card member are located between the folded portion of the reflective sheet and the back plate. 10 . The backlight module according to claim 8 , further comprising: a plurality of light bars located between the reflection sheet and the back plate, the light-emitting chips of the light bars transmit through the reflections. 11 . holes opened in the sheet; The second plate portion is connected to the connecting portion in a T-shape, and the second plate portion has a first notch with an opening facing away from the inserting clip for positioning the light bar. 11. The backlight module of claim 8, wherein the backplane is a flat backplane. 12 . The backlight module according to claim 2 , further comprising a bracket, the bracket comprises a left side portion and a right side portion, the fixing member is arranged on the ground side and is connected with the left side side. 13 . The part and the right side part are fixedly connected by a fastener. 13 . The backlight module of claim 12 , wherein the fixing member further comprises a bending portion connected to the first plate portion and folded toward the end side of the backlight module, the bending portion 13 . The portion has a second notch for avoiding the flexible circuit connection board of the liquid crystal panel. 14. The backlight module according to any one of claims 1-7, 12, and 13, further comprising: a backplane located on the backside of the plurality of optical function film layers, wherein the fixing member is located on the the back side of the backplane. 15. A display device, comprising the backlight module according to any one of claims 1-14.

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