An anti-glare optical film, a display module and a manufacturing method thereof

Abstract

The present application relates to an anti-glare optical film, a display module and a manufacturing method thereof, belonging to the technical field of anti-glare. It includes a transparent substrate, a plurality of first light-reducing layers and a second light-reducing layer. The transparent substrate has a bearing surface; the plurality of first light-reducing layers are spaced apart on the bearing surface of the transparent substrate, and a light guide film is provided on the side wall surface of each first light-reducing layer; the second light-reducing layer is arranged on the bearing surface of the transparent substrate and wraps each light guide film; wherein, a light passage is defined between every two relatively arranged light guide films, the refractive index of the light guide film is less than that of the second light-reducing layer, and the refractive index of the second light-reducing layer is less than that of the first light-reducing layer. The present application can avoid the refraction of the light into the second light-reducing layer, resulting in light intensity loss, thereby improving the light extraction rate and the contrast of the display screen; the refractive index of the second light-reducing layer is less than that of the first light-reducing layer, and macroscopically, an equivalent gradient refractive index effect can be shown, thereby effectively reducing the total reflection of ambient light on the optical film and effectively improving the anti-glare effect.

Description

Technical Field

[0001] The present application relates to the technical field of anti-glare, and in particular to an anti-glare optical film, a display module and a manufacturing method thereof. Background Art

[0002] With the rapid development of the electronic information industry, various portable electronic terminals and electronic products, such as mobile phones, computers, and conference electronic tablets, have become extremely popular, bringing great convenience to people's work and life. However, in the actual process of using electronic products, people are often affected by "glare". "Glare" refers to the visual condition in which the field of view has an inappropriate brightness distribution, or there is an extreme brightness contrast in space or time, resulting in visual discomfort and reduced visibility of objects. "Anti-glare" means that when light passes through the screen or the surface of an object, a certain degree of diffuse reflection occurs, weakening the specular reflection, thereby reducing the light intensity entering the human eye and thus reducing or eliminating discomfort.

[0003] In related technologies, optical particles are provided in the optical film of the display module. The main function of the optical particles is to generate haze to increase diffuse reflection, and the haze size is adjusted by controlling the particle size and density, etc. However, the uneven particle distribution and excessive particle size of the optical particles make the display module prone to the phenomena of uneven haze and flash points. In fact, the effect on anti-glare is limited and cannot significantly improve the display effect. Summary of the Invention

[0004] The present application aims to at least solve the problem in the prior art that optical particles are provided in the optical film of the display module, but the uneven particle distribution and excessive particle size of the optical particles make the display module prone to the phenomena of uneven haze and flash points. In fact, the effect on anti-glare is limited and cannot significantly improve the display effect. For this reason, the present application provides an anti-glare optical film, a display module and a manufacturing method thereof.

[0005] In a first aspect, the present application provides an anti-glare optical film, comprising:

[0006] A transparent substrate having a bearing surface;

[0007] A plurality of first light-reducing layers are spacedly arranged on the bearing surface of the transparent substrate, and a light guide film is provided on the side wall surface of each first light-reducing layer;

[0008] A second light-reducing layer is provided on the bearing surface of the transparent substrate and wraps each light guide film; wherein, a light channel is defined between every two oppositely arranged light guide films, the refractive index of the light guide film is less than that of the second light-reducing layer, and the refractive index of the second light-reducing layer is less than that of the first light-reducing layer.

[0009] By adopting the above technical solution, on the one hand, a light channel is defined between the two light guide films, and the refractive index of the light guide film is less than that of the first light reduction layer, which can avoid the refraction of the light into the first light reduction layer and cause light intensity loss, thereby improving the light extraction rate and the contrast of the display screen; on the other hand, the refractive index of the second light reduction layer is less than that of the first light reduction layer, and macroscopically, an equivalent gradient refractive index effect can be shown, thereby effectively reducing the total reflection of ambient light on the optical film and effectively improving the anti-glare effect.

[0010] According to an embodiment of the present application, an absorbing layer is provided in the first light reduction layer, the height of the absorbing layer is higher than that of the first light reduction layer, and the part of the absorbing layer higher than the height of the first light reduction layer abuts against the upper surface of the second light reduction layer;

[0011] Wherein, every two oppositely arranged light guide films and the part of the absorbing layer higher than the height of the first light reduction layer jointly define the light channel.

[0012] By adopting the above technical solution, when the ambient light enters the second light reduction layer from the lower left, it will be blocked and absorbed by the spaced absorbing layers, thereby further reducing the total reflection of the ambient light on the optical film and improving the anti-glare effect.

[0013] In addition, the absorbing layer also separates two adjacent light channels to avoid the problem of light crosstalk between two adjacent light channels, which can improve the contrast of the optical film in the display screen.

[0014] According to an embodiment of the present application, the upper surface of the second light reduction layer includes: a second convex surface and a second concave surface integrally formed;

[0015] The second convex surface and the second concave surface are arranged alternately, the second convex surface protrudes in a direction perpendicular to the transparent substrate, the second concave surface recesses in a direction perpendicular to the transparent substrate, and the second concave surface is directly above the corresponding light channel.

[0016] By adopting the above technical solution, by protruding the second convex surface in a direction perpendicular to the transparent substrate, the height of the part of the absorbing layer higher than the first light reduction layer can be increased, thereby maximizing the light absorption area of the absorbing layer and improving the anti-ambient light performance.

[0017] And the second concave surface recesses in a direction perpendicular to the transparent substrate and is integrally formed with the second convex surface, which can increase the diffuse reflection of the ambient light on the second convex surface and the second concave surface and improve the anti-glare effect.

[0018] According to an embodiment of the present application, the upper surface of the first light reduction layer includes: a first convex surface;

[0019] The first convex surface protrudes in a direction perpendicular to the transparent substrate, and the first convex surface corresponds to the second convex surface.

[0020] According to an embodiment of the present application, a plurality of first accommodating grooves are formed on the transparent substrate. The first accommodating grooves are used to accommodate light sources and are spaced apart from each other.

[0021] Wherein, each of the first accommodating grooves faces the optical channel; and / or, a second accommodating groove is formed at one end of the second light reduction layer close to the transparent substrate. The second accommodating groove faces the first accommodating groove, and the second accommodating groove and the first accommodating groove are used to jointly accommodate the light source.

[0022] By adopting the above technical solution, each first accommodating groove is directly aligned with the optical channel, which can achieve a more direct lighting effect, improve the light utilization rate, and ensure that the light is evenly distributed in the display area.

[0023] By installing the light source in the accommodating groove corresponding to the optical channel, the propagation path and distribution of light can be more effectively controlled, thereby improving the display quality and facilitating the maintenance and replacement work at the same time.

[0024] According to an embodiment of the present application, a filter is installed on the top of the second accommodating groove. The filter is used to filter out ambient light different from the light emitted by the light source.

[0025] By adopting the above technical solution, the filter can effectively filter out ambient light with a wavelength different from that of the light emitted by the light source, reduce the interference of ambient light with a wavelength different from that of the light emitted by the light source, thereby further improving the contrast and improving the visual experience.

[0026] In a second aspect, the present application provides a display module, including: the optical film sheet as described in any of the above embodiments and a plurality of light sources; each of the light sources faces the optical channel of the optical film sheet.

[0027] In a third aspect, the present application provides a method for manufacturing an optical film sheet, including:

[0028] Forming a light guide film on the side wall surface of each first light reduction layer;

[0029] Correspondingly bonding each first light reduction layer to the bearing surface of the transparent substrate, and a plurality of the first light reduction layers are distributed at intervals; forming a second light reduction layer on the bearing surface of the transparent substrate. The second light reduction layer wraps each of the light guide films and defines an optical channel between every two relatively arranged light guide films.

[0030] According to an embodiment of the present application, before forming the light guide film on the side wall surface of each first light reduction layer, the manufacturing method further includes:

[0031] Form a through hole at the center of the first light reduction layer;

[0032] Fabricate a light absorbing layer in the through hole, and the height of the light absorbing layer is higher than that of the first light reduction layer.

[0033] In summary, the present application includes at least one of the following beneficial technical effects: on the one hand, a light guiding channel is defined between two light guiding films, and the refractive index of the light guiding film is less than that of the first light reduction layer, which can prevent the light from refracting into the first light reduction layer and causing light intensity loss, thereby improving the light extraction rate and the contrast of the display screen; on the other hand, the refractive index of the second light reduction layer is less than that of the first light reduction layer, and macroscopically, an equivalent gradient refractive index effect can be shown, thereby effectively reducing the total reflection of ambient light on the optical film, effectively enhancing the anti-glare effect, and improving the display effect. Description of the Drawings

[0034] Figure 1 is one of the structural schematic diagrams of an anti-glare optical film provided by an embodiment of the present application;

[0035] Figure 2 is another structural schematic diagram of an anti-glare optical film provided by an embodiment of the present application;

[0036] Figure 3 is still another structural schematic diagram of an anti-glare optical film provided by an embodiment of the present application;

[0037] Figure 4 is yet another structural schematic diagram of an anti-glare optical film provided by an embodiment of the present application;

[0038] Figure 5 is the structural schematic diagram of a display module provided by an embodiment of the present application;

[0039] Figure 6 is the step flow schematic diagram of a method for manufacturing an anti-glare optical film provided by an embodiment of the present application.

[0040] Reference Numerals:

[0041] 10. Optical film; 100. Transparent substrate; 110. Carrying surface; 120. Second accommodation groove; 210. First light reduction layer; 211. First convex surface; 220. Second light reduction layer; 221. Second convex surface; 222. Second concave surface; 300. Light guiding film; 400. Light absorbing layer; 500. Filter; 20. Light source; a. Light guiding channel. Detailed Embodiments

[0042] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0043] Reference will be made below Figures 1-6 to describe an anti-glare optical film, a display module and a manufacturing method thereof according to an embodiment of the present application.

[0044] As Figure 1 shown, an anti-glare optical film 10 includes: a transparent substrate 100, a plurality of first light reduction layers 210 and a second light reduction layer 220.

[0045] The transparent substrate 100 has a bearing surface 110. As the support of the entire structure, the transparent substrate 100 should have good light transmittance and certain mechanical strength.

[0046] In actual implementation, the transparent substrate 100 includes PET (polyethylene terephthalate), PC (polycarbonate) or glass.

[0047] A plurality of first light reduction layers 210 are arranged at intervals on the bearing surface 110 of the transparent substrate 100, and a light guide film 300 is provided on the side wall surface of each first light reduction layer 210.

[0048] The second light reduction layer 220 is arranged on the bearing surface 110 of the transparent substrate 100 and wraps each light guide film 300 and the first light reduction layer 210.

[0049] Wherein, a light channel a is defined between every two relatively arranged light guide films 300. The refractive index of the light guide film 300 is less than that of the first light reduction layer 210, and the refractive index of the second light reduction layer 220 is less than that of the first light reduction layer 210.

[0050] In actual use, a light source 20 is arranged on the side of the transparent substrate 100 away from the second light reduction layer 220, and the external ambient light is incident on the surface of the second light reduction layer 220.

[0051] In the above embodiment of the present application, the refractive index of the light guide film 300 is less than that of the first light reduction layer 210, which provides conditions for the light of the light source 20 to be totally reflected and emitted in the light channel a.

[0052] In other words, the design that a light channel a is defined between two light guide films 300 and the refractive index of the light guide film 300 is less than that of the first light reduction layer 210 can avoid the light being refracted into the first light reduction layer 210 and causing light intensity loss, and improve the light extraction rate.

[0053] The refractive index of the second light-dimming layer 220 is less than that of the first light-dimming layer 210, and macroscopically, an equivalent gradient refractive index effect can be exhibited, thereby effectively reducing the total reflection of ambient light on the optical film 10 and effectively improving the anti-glare effect.

[0054] In summary, on the one hand, a light channel a is defined between the two light guide films 300, and the design that the refractive index of the light guide film 300 is less than that of the first light-dimming layer 210 can prevent the light from refracting into the first light-dimming layer 210 and causing light intensity loss, thereby improving the light extraction rate and the contrast of the display screen; on the other hand, the refractive index of the second light-dimming layer 220 is less than that of the first light-dimming layer 210, and macroscopically, an equivalent gradient refractive index effect can be exhibited, thereby effectively reducing the total reflection of ambient light on the optical film 10 and effectively improving the anti-glare effect and improving the display effect.

[0055] In actual implementation, first diffusion particles can be uniformly arranged in each first light-dimming layer 210, and second diffusion particles can be uniformly arranged in the area of the second light-dimming layer 220 opposite to the first light-dimming layer 210. The average refractive index of several first diffusion particles in the first light-dimming layer 210 is greater than the average refractive index of several second diffusion particles in the second light-dimming layer 220 (not shown).

[0056] Based on the interference principle of reflected light, when light is incident on the surfaces of the second diffusion particles and the first diffusion particles with different refractive indices, interference cancellation will occur, which can further reduce the reflectivity of ambient light, thereby improving the anti-reflection effect of the optical film 10 and further improving the display screen quality.

[0057] As Figure 2 shown, in some embodiments, an absorbing layer 400 is provided in the first light-dimming layer 210. The height of the absorbing layer 400 is higher than that of the first light-dimming layer 210, and the part of the absorbing layer 400 higher than the height of the first light-dimming layer 210 abuts against the upper surface of the second light-dimming layer 220.

[0058] Among them, the part of each pair of oppositely arranged light guide films 300 and the absorbing layer 400 higher than the height of the first light-dimming layer 210 jointly define the light channel a.

[0059] It should be noted that since the structure of the absorbing layer 400 is fine and cannot be detected by the human naked eye, therefore, it will not affect the visual experience and there will be no fine lines in front of the vision. In actual implementation, the absorbing layer 400 can be made of black TPU material.

[0060] In this embodiment, when the ambient light enters the second light-dimming layer 220 from the lower left, it will be blocked and absorbed by the spaced absorbing layers 400, thereby further reducing the total reflection of the ambient light on the optical film 10 and improving the anti-glare effect.

[0061] In addition, the light-absorbing layer 400 also separates two adjacent optical channels a from each other, avoiding the problem of light crosstalk between two adjacent optical channels a, which can improve the contrast of the display screen of the optical film 10.

[0062] As Figure 3 shown, in actual implementation, the part of the light-absorbing layer 400 that is higher than the height of the first light-reducing layer 210 is located at the center of the first light-reducing layer 210.

[0063] As Figure 3 shown, in some embodiments, the upper surface of the second light-reducing layer 220 includes: an integrally formed second convex surface 221 and a second concave surface 222.

[0064] The second convex surface 221 and the second concave surface 222 are arranged alternately. The second convex surface 221 protrudes in a direction perpendicular to the transparent substrate 100, and the second concave surface 222 is recessed in a direction perpendicular to the transparent substrate 100. The second concave surface 222 is directly above the corresponding optical channel a.

[0065] In this embodiment, by protruding the second convex surface 221 in a direction perpendicular to the transparent substrate 100, the height of the part of the light-absorbing layer 400 that is higher than the first light-reducing layer 210 can be increased, thereby maximizing the light-absorbing area of the light-absorbing layer 400 and improving the anti-ambient light performance.

[0066] The second concave surface 222 is recessed in a direction perpendicular to the transparent substrate 100 and is integrally formed with the second convex surface 221, which can increase the diffuse reflection of ambient light on the second convex surface 221 and the second concave surface 222 and enhance the anti-glare effect.

[0067] As Figure 3 shown, in some embodiments, the upper surface of the first light-reducing layer 210 includes: a first convex surface 211.

[0068] The first convex surface 211 protrudes in a direction perpendicular to the transparent substrate 100, and the first convex surface 211 corresponds to the second convex surface 221.

[0069] In this embodiment, the first convex surface 211 helps to reduce reflection and glare caused by ambient light.

[0070] As Figure 4 shown, the optical film 10 is used in cooperation with the light-emitting source 20. In order to achieve better installation of the light-emitting source 20, the optical film 10 can be at least one of the following structural forms:

[0071] One: A plurality of first accommodation grooves are formed in the transparent substrate 100. The first accommodation grooves are used to accommodate the light-emitting source 20 and are spaced apart from each other. Each first accommodation groove is directly opposite to the optical channel a.

[0072] Second: A plurality of first accommodation grooves are formed in the transparent substrate 100. The first accommodation grooves are used to accommodate the light-emitting sources 20 and are spaced apart from each other. One end of the second light-dimming layer 220 close to the transparent substrate 100 is provided with a second accommodation groove 120. The second accommodation groove 120 is aligned with the first accommodation groove, and the second accommodation groove 120 and the first accommodation groove are used to jointly accommodate the light-emitting source 20.

[0073] In the above embodiment, each first accommodation groove is directly aligned with the light channel a, which can achieve a more direct lighting effect, improve the light utilization rate, and ensure that the light is evenly distributed in the display area.

[0074] By installing the light-emitting source 20 in the first accommodation groove and the second accommodation groove corresponding to the light channel a, the propagation path and distribution of light can be more effectively controlled, thereby improving the display quality, and at the same time facilitating the maintenance and replacement work.

[0075] Of course, the light-emitting source 20 is not installed in the accommodation groove corresponding to the light channel a, but the setting method corresponding only to the first accommodation groove and the second accommodation groove should also be allowed.

[0076] Such as Figure 4 and Figure 5 As shown, in some embodiments, a filter 500 is installed on the top of the second accommodation groove 120. The filter 500 is used to filter out the ambient light different from the light emitted by the light-emitting source 20.

[0077] In this embodiment, the filter 500 can effectively filter out the ambient light with a wavelength different from that of the light emitted by the light-emitting source 20, reduce the interference of the ambient light with a wavelength different from that of the light emitted by the light-emitting source 20, thereby further improving the contrast and improving the visual experience.

[0078] The present application also provides a display module, including the optical film 10 and a plurality of light-emitting sources 20 in any of the above embodiments. Each light-emitting source 20 is aligned with the light channel a of the optical film 10.

[0079] Such as Figure 6 As shown, the present application also provides a manufacturing method of the optical film 10, including: step 610, step 620, and step 630.

[0080] Step 610: Form a light guide film 300 on the side wall surface of each first light-dimming layer 210.

[0081] In this step, the light guide film 300 can be formed on the side wall surface of the first light-dimming layer 210 by coating, spraying, or precision printing technology.

[0082] The light guide film 300 should have excellent optical properties, such as high transparency and moderate refractive index, to ensure effective light guiding.

[0083] Step 620: Bond each first light reduction layer 210 to the bearing surface 110 of the transparent substrate 100, and the multiple first light reduction layers 210 are distributed at intervals.

[0084] In this step, bonding can be performed using optical glue or other transparent adhesives to ensure bonding strength and long-term stability.

[0085] Ensure the accurate position of each first light reduction layer 210, align it with the bearing surface 110 of the transparent substrate 100. The first light reduction layer 210 includes, but is not limited to, PMMA (polymethyl methacrylate) or PC (polycarbonate).

[0086] Step 630: Form a second light reduction layer 220 on the bearing surface 110 of the transparent substrate 100. The second light reduction layer 220 wraps each light guide film 300, and a light channel a is defined between every two relatively arranged light guide films 300.

[0087] In this step, the second light reduction layer 220 can be formed by coating, molding or other suitable manufacturing techniques.

[0088] The second light reduction layer 220 should be selected from materials that can effectively wrap the light guide film 300 and have good optical properties. The second light reduction layer 220 includes, but is not limited to, PMMA (polymethyl methacrylate) or PC (polycarbonate).

[0089] In the above embodiments of the present application, the refractive index of the light guide film 300 is less than that of the first light reduction layer 210, which provides conditions for total internal reflection of the light of the light source 20 in the light channel a for outgoing.

[0090] In other words, the design that the light channel a is defined between two light guide films 300 and the refractive index of the light guide film 300 is less than that of the first light reduction layer 210 can avoid the light refracting into the first light reduction layer 210 and causing light intensity loss, thereby improving the light extraction rate.

[0091] The refractive index of the second light reduction layer 220 is less than that of the first light reduction layer 210, which can macroscopically exhibit an equivalent graded refractive index effect, thereby effectively reducing the total reflection amount of ambient light on the optical film 10 and effectively improving the anti-glare effect.

[0092] In summary, on the one hand, the design that the light channel a is defined between two light guide films 300 and the refractive index of the light guide film 300 is less than that of the first light reduction layer 210 can avoid the light refracting into the first light reduction layer 210 and causing light intensity loss, thereby improving the light extraction rate and the contrast of the display screen; on the other hand, the refractive index of the second light reduction layer 220 is less than that of the first light reduction layer 210, which can macroscopically exhibit an equivalent graded refractive index effect, thereby effectively reducing the total reflection amount of ambient light on the optical film 10 and effectively improving the anti-glare effect.

[0093] In some embodiments, before forming the light guide film 300 on the side wall surfaces of each first light reduction layer 210, the manufacturing method further includes:

[0094] Forming a through hole in the center of the first light reduction layer 210.

[0095] Manufacturing a light absorption layer 400 in the through hole, and the height of the light absorption layer 400 is higher than the height of the first light reduction layer 210.

[0096] In this embodiment, when ambient light enters the second light reduction layer 220 from the lower oblique direction, it will be blocked and absorbed by the spaced light absorption layers 400, thereby further reducing the total reflection of ambient light on the optical film 10 and enhancing the anti-glare effect.

[0097] In addition, the light absorption layer 400 also separates two adjacent light channels a from each other, avoiding the problem of light crosstalk between two adjacent light channels a, which can improve the contrast of the display picture of the optical film 10.

[0098] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An anti-glare optical film, characterized in that: include: A transparent substrate (100), wherein the transparent substrate (100) has a bearing surface (110); A plurality of first light reduction layers (210), wherein the plurality of first light reduction layers (210) are arranged at intervals on the bearing surface (110) of the transparent substrate (100), and a light guide film (300) is arranged on the opposite side wall surface of each first light reduction layer (210), and the orthographic projection of the light guide film (300) on the bearing surface (110) falls within the range of the orthographic projection of the first light reduction layer (210) on the bearing surface (110); a second light reduction layer (220), wherein the second light reduction layer (220) is arranged on the bearing surface (110) of the transparent substrate (100), between the two oppositely arranged light guide films (300) included in two adjacent first light reduction layers (210), and on the top of the first light reduction layer (210) so as to wrap each light guide film (300) and the first light reduction layer (210); wherein , a light channel is defined between the two light guide films (300) arranged on the side walls of each two adjacent first light reduction layers (210), the light channel is used to realize total reflection transmission of light, the refractive index of the light guide film (300) is smaller than that of the second light reduction layer (220), the refractive index of the second light reduction layer (220) is smaller than that of the first light reduction layer (210), the upper surface of the second light reduction layer (220) comprises a second convex surface (221) and a second concave surface (222); the second convex surface (221) and the second concave surface (222) are arranged alternately, the second convex surface (221) is convex in a direction perpendicular to the transparent substrate (100), the second concave surface (222) is concave in a direction perpendicular to the transparent substrate (100), and the second concave surface (222) is located directly above the corresponding light channel; A light absorbing layer (400) is arranged in each of the first light reduction layers (210), the height of the light absorbing layer (400) is higher than the height of the first light reduction layer (210), and the width of the light absorbing layer (400) is smaller than the width of the first light reduction layer (210).

2. The optical film according to claim 1, characterized in that: The portion of the light absorbing layer (400) that is higher than the height of the first light reduction layer (210) abuts against the upper surface of the second light reduction layer (220); wherein the two light guide films (300) that are arranged opposite to each other and the portion of the light absorbing layer (400) that is higher than the height of the first light reduction layer (210) jointly define the light channel.

3. The optical film according to claim 2, characterized in that: The portion of the light absorbing layer (400) that is higher than the height of the first light reduction layer (210) is located at the center of the first light reduction layer (210).

4. The optical film according to claim 1, characterized in that: The upper surface of the first light reduction layer (210) comprises: a first convex surface (211); the first convex surface (211) is convexly arranged in a direction perpendicular to the transparent substrate (100), and the first convex surface (211) corresponds to the second convex surface (221).

5. The optical film according to any one of claims 1 to 4, characterized in that: The transparent substrate (100) is provided with a plurality of first accommodating grooves, the plurality of first accommodating grooves are spaced apart, and each of the first accommodating grooves is directly opposite to the light channel; and / or the second light reduction layer (220) is provided with a second accommodating groove (120) at one end close to the transparent substrate (100), and the second accommodating groove (120) is directly opposite to the first accommodating groove.

6. The optical film according to claim 5, characterized in that: A filter (500) is installed on the top of the second containing groove (120), and the filter (500) is used to filter out ambient light that is different from the light emitted by the light source (20).

7. A display module, characterized in that: include: An optical film as claimed in any one of claims 1 to 6 and a plurality of light sources (20); each of the light sources (20) is directly opposite to a light channel of the optical film.

8. A method for manufacturing an optical film according to any one of claims 1 to 6, characterized in that: include: A light-guiding film (300) is formed on the side wall surface of each first light-reducing layer (210); each first light-reducing layer (210) is bonded to a corresponding supporting surface (110) of a transparent substrate (100), and a plurality of the first light-reducing layers (210) are distributed at intervals; a second light-reducing layer (220) is formed on the supporting surface (110) of the transparent substrate (100), the second light-reducing layer (220) wraps around each of the light-guiding films (300), and a light channel is defined between each two light-guiding films (300) that are arranged opposite to each other.

9. A method for manufacturing an optical film as claimed in claim 8, characterized in that: Before forming a light-guiding film (300) on the side wall surface of each first light-reduction layer (210), the manufacturing method further comprises: forming a through hole at the center of the first light-reduction layer (210); and manufacturing a light-absorbing layer (400) in the through hole, wherein the height of the light-absorbing layer (400) is higher than the height of the first light-reduction layer (210).

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