Processing method of reflective film, reflective film and backlight module

Abstract

This invention relates to the field of optical display technology, specifically to a method for processing a reflective film, the reflective film itself, and a backlight module. The method for processing the reflective film includes the following steps: bonding and fixing a substrate layer to a reflective layer; applying UV structural adhesive to the side of the substrate layer away from the reflective layer, and then rolling the UV structural adhesive using a rolling die; and performing UV curing on the rolled substrate layer to form a connecting layer on the substrate layer. The connecting layer includes multiple reflective structures, and external light transmitted from the reflective layer is transmitted towards the substrate layer after passing through at least two reflective positions. When preparing the reflective film using the processing method of this embodiment, by setting the connecting layer on the side of the substrate layer away from the reflective layer, light transmitted from the reflective layer can be reflected towards the substrate layer through the reflective positions of the reflective structures, thereby improving the overall display brightness of the backlight module. Compared to existing reflective films in backlight modules, this method can effectively improve the brightness of the backlight module.

Description

Technical Field

[0001] The present invention relates to the field of optical display technology, and in particular to a processing method of a reflective film, a reflective film and a backlight module. Background Art

[0002] Reflective film is an optical film used in TFT-LCD backlight modules to improve the luminous efficiency of the entire backlight system. By applying reflective film to the backlight modules of small-sized electronic devices such as mobile phones, digital cameras, and tablets, and utilizing optical principles such as reflection and total reflection, and by cooperating with the light guide plate, the light passing through the light guide plate and the light reflected back by the light enhancement film can be emitted toward the front of the LCD screen again, thereby improving the brightness of the backlight module. On the premise of ensuring the compact structure of the backlight module of the electronic device, the display effect of the backlight module is effectively improved, and the backlight module is fixed to the back of the reflective film through an iron frame.

[0003] During the use of the existing backlight module, part of the light continues to be transmitted toward the back side of the backlight module after passing through the reflective film, and is lost in the transmission process by, for example, absorption, etc., which affects the display brightness of the backlight module. At the same time, since the back side of the reflective film is in close contact with the iron frame, the defect of uneven brightness is also prone to occur.

[0004] Therefore, it is necessary to make improvements to the above problems in order to change the current situation. Summary of the invention

[0005] The invention provides a processing method of a reflective film, a reflective film and a backlight module, which are used to solve the problem of uneven brightness caused by the loss of part of the light in the existing backlight module after passing through the reflective film.

[0006] The present invention provides a method for processing a reflective film, comprising the following steps:

[0007] Providing a substrate layer, a reflective layer and a rolling mold, and bonding and fixing the substrate layer and the reflective layer;

[0008] Performing molding processing on the substrate layer, coating a UV structural adhesive on a side of the substrate layer away from the reflective layer, and rolling-molding the UV structural adhesive using the rolling mold;

[0009] The UV structural adhesive is UV cured, and the rolled substrate layer is UV cured to form a connecting layer on the substrate layer; wherein the connecting layer includes a plurality of reflective structures, and the reflective structure has at least two reflective positions on a side facing the substrate layer, and external light transmitted from the substrate layer is transmitted toward the substrate layer after passing through at least two of the reflective positions.

[0010] According to one embodiment of the present invention, the step of UV curing the UV structural adhesive further comprises the following steps:

[0011] Providing a rear pressure roller and being arranged on one side of the rolling mold, driving the substrate layer coated with the UV structural adhesive to pass between the rolling mold and the rear pressure roller, and the rear pressure roller abuts the substrate layer against the rolling mold;

[0012] The roll-formed substrate layer is irradiated with a UV lamp to cure the UV structural adhesive to form a connecting layer.

[0013] According to one embodiment of the present invention, the step of providing a substrate layer, a reflective layer and a rolling mold further comprises the following steps:

[0014] A reflective layer and a substrate layer are provided, and the reflective layer and the substrate layer are bonded and fixed by an adhesive.

[0015] According to an embodiment of the present invention, the step of forming the reflective layer further comprises the following steps:

[0016] Providing a front pressing roller and being arranged upstream of the rolling die;

[0017] The substrate layer is subjected to molding processing, UV structural adhesive is coated on the side of the substrate layer away from the reflective layer, and the substrate layer is driven to pass between the rolling mold and the front pressure roller, and the front pressure roller abuts the substrate layer against the rolling mold.

[0018] According to one embodiment of the present invention, the adhesive is UV glue, and the UV glue between the substrate layer and the reflective layer is cured and bonded by a UV lamp at the same time as the step of UV curing the UV structural adhesive.

[0019] According to an embodiment of the present invention, the substrate layer is any one of a PET film, a white film, a black film, an aluminum-plated film, and a silver-plated film.

[0020] According to one embodiment of the present invention, the projection shape of the reflective structure on the plane perpendicular to the substrate layer is a triangular structure, and the angle range of the side of the triangular structure away from the substrate layer is 45°-135°; the reflective structure is a polygonal structure or the reflective structure extends in a straight direction.

[0021] According to an embodiment of the present invention, the thickness of the connection layer is 6-50 μm, and the distance between the ends of two adjacent reflective structures away from the substrate layer is 12-100 μm.

[0022] The present invention also provides a reflective film, which is prepared by any one of the processing methods described above.

[0023] The present invention further provides a backlight module, comprising the reflective film as described in any one of the above items.

[0024] Implementing the embodiments of the present invention has the following beneficial effects:

[0025] In the reflective film of the present embodiment, a connecting layer is arranged on the side of the substrate layer away from the reflective layer, so that the light transmitted from the reflective layer can be reflected toward the substrate layer through the reflective position of the reflective structure, so as to improve the overall display brightness of the backlight module. Compared with the reflective film in the existing backlight module, the brightness of the backlight module can be effectively improved; in addition, the supporting frame on the rear side of the reflective film achieves point contact or line contact through the reflective structure, which can effectively improve the problem of uneven display brightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] in:

[0028] Figure 1 is a schematic flow chart of a method for processing a reflective film in an embodiment of the present invention;

[0029] Figure 2 is a schematic diagram of the processing flow of the reflective film in an embodiment of the present invention;

[0030] Figure 3 is a schematic structural diagram of a backlight module in an embodiment of the present invention;

[0031] Figure 4 is a schematic structural diagram of a reflective film in Embodiment 1 of the present invention;

[0032] Figure 5 is a schematic structural diagram of a reflective film in Embodiment 2 of the present invention;

[0033] Figure 6 is a schematic structural diagram of a reflective film in Embodiment 3 of the present invention;

[0034] Figure 7 is a schematic structural diagram of a reflective film in a fourth embodiment of the present invention;

[0035] Reference numerals:

[0036] 1. Backlight module 1;

[0037] 10. Reflective film;

[0038] 100, connecting layer; 110, reflecting structure;

[0039] 200, reflective layer;

[0040] 300, substrate layer;

[0041] 400, adhesive;

[0042] 500, support frame;

[0043] 2. Rolling mold; 3. Rear pressure roller; 4. Front pressure roller; 5. UV lamp; 6. Winding roller. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] See also Figure 1 and Figure 2 As shown, the present invention provides a method for processing a reflective film, comprising the following steps:

[0046] Step S100, providing a substrate layer 300, a reflective layer 200 and a rolling mold 2, and bonding and fixing the substrate layer 300 and the reflective layer 200;

[0047] Step S200, forming the substrate layer 300, coating a UV structural adhesive on a side of the substrate layer 300 away from the reflective layer 200, and rolling the UV structural adhesive through a rolling mold 2;

[0048] Step S300, UV structural adhesive is UV cured, and the rolled substrate layer 300 is UV cured to form a connecting layer 100 on the substrate layer 300; wherein the connecting layer 100 includes a plurality of reflective structures 110, and the reflective structure 110 has at least two reflective positions on a side facing the substrate layer 300, and the external light transmitted from the substrate layer 300 is transmitted toward the substrate layer 300 after passing through at least two reflective positions.

[0049] When the processing method of this embodiment is used to prepare the reflective film 10, by setting the connecting layer 100 on the side of the substrate layer 300 away from the reflective layer 200, the light transmitted from the substrate layer 300 can be reflected toward the substrate layer 300 through the reflective position of the reflective structure 110, so as to improve the overall display brightness of the backlight module 1. Compared with the reflective film 10 in the existing backlight module 1, the brightness of the backlight module 1 can be effectively improved; in addition, the support frame 500 on the rear side of the reflective film 10 is in point contact or line contact through the reflective structure 110, which can effectively improve the problem of uneven display brightness. In a preferred embodiment, the reflective layer 200 is a silver-plated film to ensure that the light passing through the connecting layer 100 and / or entering the reflective layer 200 can be reflected by the reflective layer of the silver-plated film so that it is transmitted in a direction away from the substrate layer 300.

[0050] When testing the reflective film 10 manufactured by the processing method of this embodiment, the bonding state between the substrate layer 300 and the supporting frame 500 can be determined by lighting an external backlight source and evacuating the reflective film 10 .

[0051] Specifically, step S300 includes the following steps:

[0052] A rear pressure roller 3 is provided and arranged on one side of the rolling mold 2, driving the substrate layer 300 coated with UV structural adhesive to pass between the rolling mold 2 and the rear pressure roller 3, and the rear pressure roller 3 abuts the substrate layer 300 against the rolling mold 2; by cooperating with the rear pressure roller 3 and the rolling mold 2, the thickness of the reflective film 10 and the molding height of the connecting layer 100 can be controlled by adjusting the gap between the two; Figure 2 As shown, in this embodiment, along the processing flow of the reflective film 10, the rear pressure roller 3 is arranged downstream of the rolling mold 2. When the reflective film 10 is conveyed between the rolling mold 2 and the rear pressure roller 3, the rear pressure roller 3 can press the reflective film 10 so that the reflective layer 200 can be tightly attached to the rolling mold 2 to prepare a connecting layer 100 with multiple reflective structures 110 on the surface of the substrate layer 300.

[0053] Subsequently, the UV lamp 5 is used to irradiate the roll-formed substrate layer 300 to cure the UV structural adhesive to form the connection layer 100. After the rear pressure roller 3 extrude the reflective film 10, the UV lamp 5 is used to irradiate the reflective film 10 to cure the UV structural adhesive 120, thereby forming a complete structure of the reflective structure 110, and the processing efficiency is also improved.

[0054] In one embodiment, step S100 includes the following steps:

[0055] In this embodiment, the reflective layer 200 and the substrate layer 300 can be rolled up and transported by respective rollers. When the reflective layer 200 and the substrate layer 300 are transported to the rolling mold 2, the adhesive 400 can be applied between the two to bond and fix them.

[0056] A reflective layer 200 and a base layer 300 are provided, and the reflective layer 200 and the base layer 300 are bonded and fixed to each other by an adhesive 400 .

[0057] Further, step S200 includes the following steps:

[0058] A front pressure roller 4 is provided and arranged upstream of the rolling mold 2; with this arrangement, when the reflective film 10 is conveyed between the rolling mold 2 and the front pressure roller 4, the thickness of the composite reflective layer 200 and the substrate layer 300 can be controlled by setting the distance between the front pressure roller 4 and the rolling mold 2.

[0059] The substrate layer 300 is molded, UV structural adhesive is coated on the side of the substrate layer 300 away from the reflective layer 200 and the substrate layer 300 is driven through between the rolling mold 2 and the front pressure roller 4 , and the front pressure roller 4 abuts the substrate layer 300 against the rolling mold 2 .

[0060] When the processing method of this embodiment is used to process the reflective layer 200, the front pressure roller 4 cooperates with the rolling mold 2, and the front pressure roller 4 can not only provide pressure for the composite between the reflective layer 200 and the substrate layer 300, but also provide pressure for the UV structural adhesive 120 on the surface of the substrate layer 300 rolled by the rolling mold 2; Figure 2 As shown, when the front pressure roller 4 cooperates with the rear pressure roller 3 and the rolling mold 2, the rear pressure roller 3 and the front pressure roller 4 are arranged on the side of the reflective film 10 away from the rolling mold 2, and because the rear pressure roller 3 and the front pressure roller 4 are arranged at an interval, the reflective film 10 can be tightened on the rolling mold 2 to ensure the molding accuracy of the UV structural adhesive 120 into the reflective structure 110.

[0061] In one embodiment, the adhesive 400 is UV glue, and the UV glue between the reflective layer 200 and the substrate layer 300 is cured and bonded by a UV lamp 5 .

[0062] It should be noted that the reflective film in the existing backlight module is processed by coating the adhesive layer with a micro-concave roller, and then the substrate is compounded with PET. Since a structural layer needs to be formed on the back of the PET base film, a further process is required for the forming process. In addition, since the reflective film in the prior art is processed by heat curing, after the film is formed and rolled as a whole, it needs to be put into a drying room for curing so that the adhesive can be cured by heating.

[0063] Compared with the existing reflective film processing method, the processing method of this embodiment includes at least the following advantages: first, the reflective layer 200, the substrate layer 300, and the molded connecting layer 100 are all made of UV curing glue, which can be cured and formed by irradiation with a UV lamp 5. The overall processing flow is free of solvents and VOC emissions, and the environmental friendliness of the processing is improved. At the same time, by simultaneously molding the connecting layer 100, the composite reflective layer 200, and the substrate layer 300 in one process, the process can be saved to improve the overall processing efficiency of the reflective film 10. In addition, since the UV structural glue 120 and the adhesive 400 are both UV-cured, they can be quickly (instantly) cured after irradiation with a UV lamp 5, and the processing efficiency and processing quality are guaranteed. At the same time, when the prepared reflective film 10 is rolled up, there is no need to cure it again, and the overall processing efficiency is also improved, and the processing quality of the reflective film 10 is guaranteed.

[0064] Specifically, see Figure 2 As shown, the processing method also includes a winding process, which specifically includes the following steps:

[0065] A winding roller 6 is provided and arranged downstream of the rolling mold 2 , and the reflective film 10 formed with the connecting layer 100 is rolled up and collected by the winding roller 6 .

[0066] It can be understood that in this embodiment, after the reflective film 10 is wound on the winding roller 6, the reflective film 10 and the winding roller 6 can be packaged as a whole for transportation and storage. The molding strength of the reflective film 10 can be ensured without additional heating and curing, the processing difficulty is improved, and the product quality of the reflective film 10 is also improved.

[0067] See also Figures 3 to 7 As shown, the embodiment of the present invention further provides a reflective film 10, which can be prepared by the processing method in any of the above embodiments. Specifically, the reflective film 10 includes a connecting layer 100, a reflective layer 200 and a substrate layer 300. The substrate layer 300 is stacked on one side of the reflective layer 200 and is bonded and fixed to the reflective layer 200; the connecting layer 100 is formed on the side of the substrate layer 300 away from the reflective layer 200, and the connecting layer 100 is used to contact the external support frame 500; the light emitted by the external light source is transmitted from the reflective layer 200 toward the connecting layer 100, and the connecting layer 100 includes a plurality of reflective structures 110, and the reflective structure 110 has at least two reflective positions on one side of the reflective layer 200, and the light is transmitted toward the substrate layer 300 after passing through at least two reflective positions.

[0068] In the reflective film 10 of the present embodiment, by arranging the connection layer 100 on the side of the substrate layer 300 away from the reflective layer 200, the light transmitted from the reflective layer 200 can be reflected toward the substrate layer 300 through the reflective position of the reflective structure 110, so as to improve the overall display brightness of the backlight module 1. Compared with the reflective film 10 in the existing backlight module 1, the brightness of the backlight module 1 can be effectively improved; in addition, the support frame 500 on the rear side of the reflective film 10 realizes point contact or line contact through the reflective structure 110, which can effectively improve the problem of uneven display brightness. In a preferred embodiment, the reflective layer 200 is a silver-plated film to ensure that the light passing through the connection layer 100 and / or entering the reflective layer 200 can be reflected by the reflective layer of the silver-plated film so that it is transmitted in a direction away from the substrate layer 300.

[0069] It should be noted that in the existing backlight module, the reflective film and the supporting frame on its rear side are directly attached, that is, the two are in surface contact. This arrangement makes it easy for the two to adsorb each other, which will cause the backlight module to display pictures with uneven brightness. In addition, the light passing through the reflective layer will also be lost in the conduction process, causing the light intensity of the reflective film to decrease, thereby affecting the display brightness of the backlight module.

[0070] Specifically in the present embodiment, a plurality of reflective structures 110 are formed on a side of the substrate layer 300 away from the reflective layer 200. Compared with the existing backlight module, the reflective structure 110 can be used to change the contact mode between the reflective film 10 and the support frame 500 from surface contact to point contact (or line contact). This is because the structure and arrangement position of the reflective structure 110 on the substrate layer 300 are randomly arranged, and the substrate layer 300 and the support frame 500 are connected by a plurality of reflective structures 110 with different heights and shapes. When external light is transmitted through the reflective layer 200 to the connecting layer 100, at least two reflective positions of the reflective structure 110 can reflect the light at least twice to redirect it toward the reflective layer 200, so that the light is re-projected onto the display surface of the backlight module 1, thereby improving the display brightness of the backlight module 1 and achieving good use effect.

[0071] See also Figures 4 to 7 As shown, in some embodiments, the height difference L between the two reflective structures 110 is 1-3 μm.

[0072] By setting a height difference between at least two of the reflective structures 110, multiple contact points can be provided between the connection layer 100 and the support frame 500, and the point contact method can be used to connect the reflective film 10 and the support frame 500 while ensuring the firmness of the connection between the two. The reflective structure 110 can also have at least two reflective positions, thereby realizing the reflective function of the connection layer 100. Figure 3 As shown, the thickness D of the connecting layer 100 is 5-50 μm.

[0073] Specifically, the base material layer 300 is any one of a PET film, a white film, a black film, an aluminum-plated film, and a silver-plated film.

[0074] It is understandable that when using the reflective film 10 of this embodiment, the substrate layer 300 of the corresponding material can be selected according to the actual design requirements of the reflective film 10, and no sole limitation is made here.

[0075] In a preferred embodiment, the connection layer 100 is a UV adhesive curing structure.

[0076] When preparing the connecting layer 100 in the reflective film 10 of this embodiment, UV structural adhesive 120 can be coated on the side of the substrate layer 300 away from the reflective layer 200, and then the UV structural adhesive 120 on the reflective layer 200 is rolled by a rolling mold 2 to form the connecting layer 100, and then the molded UV structural adhesive 120 is irradiated by a UV lamp 5 to form a reflective structure 110 on the connecting layer 100.

[0077] See also Figure 4 As shown, in the first embodiment, the projection shape of the reflective structure 110 on the plane perpendicular to the substrate layer 300 is a triangular structure, and the angle range R of the triangular structure away from the substrate layer 300 is 45°-135°, the thickness D of the connecting layer 100 is 6-50 μm, and the spacing W between the ends of two adjacent reflective structures 110 away from the substrate layer 300 is 12-100 μm. The performance parameters of the specific five examples are as follows:

[0078]

[0079] See also Figure 5 As shown, in the second embodiment, the reflective structure 110 is a four-sided structure or the reflective structure 110 extends in a straight line direction, the thickness D of the connecting layer 100 is 6-50 μm, and the spacing W between the ends of two adjacent reflective structures 110 away from the substrate layer 300 is 12-100 μm. The performance parameters of the specific five examples are as follows:

[0080]

[0081] In other embodiments, the reflective structure 110 may also be a triangular structure, a pentagonal structure, or a structure with more than five prisms. By arranging the multi-prism structures to cooperate with each other, multiple reflective positions can be formed to achieve the function of reflecting light.

[0082] See also Figure 6 As shown, in the third embodiment, the reflective structure 110 is a spherical structure, and the diameter of the spherical structure is 1-30 μm. The performance parameters of the five specific examples are as follows:

[0083]

[0084] See also Figure 7 As shown, in the fourth embodiment, one end of the reflective structure 110 is attached to the substrate layer 300, the other end of the reflective structure 110 is a spherical structure, and the spacing W between two adjacent reflective structures 110 is 5-50 μm. The performance parameters of the five specific examples are as follows:

[0085]

[0086] See also Figure 1 As shown, the present invention also provides a backlight module 1, which includes the reflective film 10 and the supporting frame 500 in any one of the above embodiments, the reflective film 10 is attached to the supporting frame 500, and the supporting frame 500 is arranged on the side of the reflective structure 110 away from the reflective layer 200, and the reflective film 10 is used to reflect the light incident from the side of the reflective layer 200 toward the reflective layer 200.

[0087] It can be understood that in the backlight module 1 of the present embodiment, by setting the reflective film 10 in any one of the above embodiments in cooperation with the supporting frame 500, the connecting layer 100 can reflect the light transmitted through the reflective layer 200. Compared with the backlight module in the prior art, the display brightness of the backlight module 1 can be improved and the problem of uneven brightness of the backlight module 1 can be improved.

[0088] The present invention further provides an electronic device, which comprises the backlight module 1 in the above embodiment.

[0089] Specifically, electronic devices include but are not limited to mobile phones, digital cameras, and tablet computers. It can be understood that by applying the backlight module 1 in the above embodiment in the present electronic device, the miniaturization design requirements of the electronic device (small-size electronic device) can be achieved first. At the same time, by arranging a reflective film 10 with a connecting layer 100 inside the backlight module 1, the light passing through the reflective layer 200 can be reflected by the connecting layer 100, thereby preventing these lights from being lost in the process of being transmitted toward the supporting frame 500. On the premise of improving the display brightness of the backlight module 1 in the electronic device, the display effect of the electronic device can be effectively improved.

[0090] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0091] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0092] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0093] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for processing a reflective film, characterized in that: The steps include: Providing a substrate layer, a reflective layer and a rolling mold, rolling and conveying the reflective layer and the substrate layer respectively through respective rollers, and when the reflective layer and the substrate layer are conveyed to the rolling mold, applying an adhesive between the reflective layer and the substrate layer to bond and fix the reflective layer and the substrate layer; A front pressure roller is provided and arranged upstream of the rolling die, the substrate layer is subjected to molding processing, UV structural adhesive is applied to the side of the substrate layer away from the reflective layer, the substrate layer is driven to pass between the rolling die and the front pressure roller, and the front pressure roller abuts the substrate layer against the rolling die; Providing a rear pressure roller and being arranged downstream of the rolling die, driving the substrate layer coated with the UV structural adhesive to pass between the rolling die and the rear pressure roller, and the rear pressure roller abuts the substrate layer against the rolling die; The UV structural adhesive is roll-formed by the rolling mold, and the roll-formed substrate layer is irradiated by a UV lamp to cure the UV structural adhesive to form a connecting layer; The gap between the rear pressure roller and the rolling mold is adjustable. When the substrate layer coated with the UV structural adhesive is conveyed between the rear pressure roller and the rolling mold, the molding height of the connecting layer is controlled by adjusting the gap between the rear pressure roller and the rolling mold. The rear pressure roller presses the substrate layer coated with the UV structural adhesive so that the reflective layer can be tightly attached to the rolling mold to prepare the connecting layer with a plurality of reflective structures of different heights on the surface of the substrate layer; wherein the reflective structure has at least two reflective positions on the side facing the substrate layer, and the external light transmitted from the substrate layer is transmitted toward the substrate layer after passing through at least two of the reflective positions.

2. The method for processing a reflective film according to claim 1, characterized in that: The adhesive is UV glue, and the UV glue between the substrate layer and the reflective layer is cured and bonded by a UV lamp at the same time as the step of performing UV curing processing on the UV structural adhesive.

3. The method for processing a reflective film according to claim 2, characterized in that: The substrate layer is any one of a PET film, a white film, a black film, an aluminum-plated film, and a silver-plated film.

4. The method for processing a reflective film according to claim 1, characterized in that: The projection shape of the reflective structure on a plane perpendicular to the substrate layer is a triangular structure, and the angle range of the triangular structure away from the substrate layer is 45°-135°; the reflective structure is a polygonal structure or the reflective structure extends in a straight direction.

5. The method for processing a reflective film according to claim 1, characterized in that: The thickness of the connecting layer is 6-50 μm, and the distance between the ends of two adjacent reflective structures away from the substrate layer is 12-100 μm.

6. A reflective film, characterized in that: The invention is prepared by the processing method according to any one of claims 1 to 5.

7. A backlight module, characterized in that: Comprising the reflective film as claimed in claim 6.

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