Optical film, composite optical film, and method for forming same

Abstract

The invention discloses an optical film, a composite optical film and a forming method thereof. The optical film comprises a first substrate; the plurality of first prisms are arranged on the first substrate, the plurality of first prisms comprise first prisms and second prisms adjacent to the first prisms, and first highest points of the first prisms are higher than second highest points of the second prisms.

Description

Technical Field

[0001] The present invention relates to an optical film, and more particularly, to an optical film with a prism structure. Background Art

[0002] With the rapid advancement of science and technology, electronic digital products are developing in the direction of being thin, light, bright, and energy-saving. Therefore, in the development of display panels, under the environmental protection needs of energy saving and carbon reduction, various technologies have emerged to improve the brightness of the optical film in the backlight module, thereby improving the overall brightness of the panel. Among them, the prism optical film in the backlight module is a key component for enhancing brightness. It mainly uses the principle of refraction and reflection of light, and uses the structure of the prism to correct the direction of the light, concentrate the light in one direction, and recycle the scattered light, thereby greatly improving the overall brightness of the backlight module and achieving a brightening effect. However, as the brightness of the prism increases, the scratch resistance of the top of the prism decreases, affecting the assembly yield of the entire module. Moreover, the automotive module has higher requirements for the brightness and weather resistance of the prism, especially under harsh conditions after thermal shock and vibration tests. The top structure of the prism lens is easily damaged, resulting in abnormalities. Therefore, while maintaining high brightness, improving the durability and performance of the top structure of the prism lens after thermal shock and vibration tests is a key factor in the design of the prism lens of the automotive module.

[0003] Therefore, the present invention proposes a new solution to overcome the above disadvantages. Summary of the invention

[0004] The object of the present invention is to provide an optical film with a prism structure, which has designs of different heights. The top of the prism adopts a rounded corner design, which enhances the overall scratch resistance of the optical film while maintaining high brightness, and improves the scratch resistance of the top of the prism itself.

[0005] The present invention combines high and low prism heights with rounded corner designs. In addition to being used as a standalone optical film, the present invention can also be laminated in pairs or in groups of three or more. This configuration maintains the original brightness performance and provides a scratch-resistant prism structure design.

[0006] At present, in order to overcome the wear of the top structure of the prism sheet after thermal shock and vibration testing, the present invention introduces a rounded corner design at the top of the prism sheet, and its radius (r) is 1-20μm. However, this rounded corner design will cause a significant reduction in brightness by 5-10%. As the radius of the rounded corner increases, the damage resistance of the top structure increases, but the brightness also decreases accordingly. This reduction in brightness will cause the automotive module to fail to meet its original design requirements, and may result in higher power consumption or increase the number of LEDs to meet brightness requirements, thereby significantly increasing energy consumption and module costs, which is inconsistent with the concept of energy saving and environmental protection.

[0007] In order to meet the end-customer demand for high brightness and high scratch resistance of liquid crystal panel products, the present invention adopts a combination of a high rounded prism structure and a low triangular prism structure. This design of incorporating rounded corners at the top of the high triangular prism structure significantly enhances the overall scratch resistance while maintaining the original high brightness of the prism. Therefore, it effectively achieves (1) reducing the number of LEDs used and (2) improving the overall power consumption of the backlight module, thereby achieving the ESG goal of energy saving and carbon reduction.

[0008] Another object of the present invention is to provide a prism structure combining high and low prism elements. This design particularly applies rounded corners to the top of the high triangular prism structure, thereby significantly enhancing the anti-scratch ability of the entire prism while maintaining the high brightness of the original triangular prism structure.

[0009] The present invention combines the high and low arrangement of triangular prisms with a rounded corner design. It can be used not only for a single prism lens, but also for an optical film formed by laminating two or more prism lenses. Such a design retains the original brightness performance while enhancing the scratch resistance of the high prism structure. The present invention can be applied to backlight modules of all LCD devices, making it suitable for smartphones, tablet computers, laptops, automotive displays, monitors and televisions.

[0010] To achieve the above-mentioned purpose, the present invention provides an optical film, comprising: a first substrate; and a first plurality of prisms, arranged on the first substrate, wherein the first plurality of prisms includes a first prism and a second prism adjacent to the first prism, wherein a first highest point of the first prism is higher than a second highest point of the second prism, wherein the top of the outer surface of the first prism includes an arc shape, and the arc shape includes a highest point of the first prism.

[0011] In one embodiment, the arc is a circular arc.

[0012] In one embodiment, a difference between a first height of the first prism and a second height of the second prism is 0.5-5 μm.

[0013] In one embodiment, a difference between a first height of the first prism and a second height of the second prism is 1-3 μm.

[0014] In one embodiment, the radius of the arc shape is 1-20 μm.

[0015] In one embodiment, the radius of the arc shape is 2-6 μm.

[0016] In one embodiment, the second prism has a triangular shape with a vertex angle ranging from 50 degrees to 100 degrees.

[0017] In one embodiment, the second prism has a triangular shape with a vertex angle ranging from 85 degrees to 95 degrees.

[0018] In one embodiment, the substrate is made of PET.

[0019] In one embodiment, a photocurable acrylic resin is coated on the PET, wherein the plurality of prisms are formed in the photocurable acrylic resin and has a refractive index between 1.48 and 1.80.

[0020] In one embodiment, the plurality of prisms include a plurality of first type prisms and a plurality of second type prisms, wherein a first highest point of the first type prisms is positioned higher than a second highest point, wherein the plurality of first type prisms and the plurality of second type prisms are arranged in an alternating manner, and wherein a top portion of an outer surface of the first type prisms includes an arc shape, and the arc shape includes the highest point of the first type prisms.

[0021] In one embodiment, the plurality of prisms include a plurality of first type prisms and a plurality of second type prisms, wherein a first highest point of the first type prisms is higher than a second highest point of the second type prisms, wherein for every two adjacent first type prisms, there are two second type prisms between the two adjacent first type prisms, and wherein a top of an outer surface of the first type prism includes an arc shape including the highest point of the first type prism.

[0022] In one embodiment, the lower surface of the substrate is coated with an anti-reflection film.

[0023] In one embodiment, the anti-reflection film is formed of a photocurable acrylic resin or a thermally curable acrylic resin, wherein a thickness of the anti-reflection film is in a range of 1 μm to 8 μm.

[0024] In one embodiment, the anti-reflection film is formed of a photocurable acrylic resin or a thermally curable acrylic resin, wherein a thickness of the anti-reflection film is in a range of 2 μm to 5 μm.

[0025] In one embodiment, a matte structure is coated on the bottom surface of the first substrate.

[0026] In one embodiment, the haze of the haze surface structure is 2-60%, preferably 10-50%.

[0027] In one embodiment, the present invention provides a composite optical film, comprising: an optical film, comprising: a first substrate; and a first plurality of prisms, arranged on the first substrate, wherein the first plurality of prisms include a first prism and a second prism adjacent to the first prism, wherein a first peak point of the first prism is higher than a second peak point of the second prism, wherein the top of the outer surface of the first prism includes an arc shape, and the arc shape includes a peak point of the first prism; and a brightness enhancement film, comprising a second plurality of prisms, wherein the brightness enhancement film is adhered to the optical film by an adhesive layer, and wherein the tops of the second plurality of prisms are immersed in the adhesive layer.

[0028] In one embodiment, the adhesive layer is formed of a photocurable acrylic resin or a thermally curable acrylic resin, wherein the haze of the adhesive layer is 1% to 60%.

[0029] In one embodiment, the adhesive layer is formed of a photocurable acrylic resin or a thermally curable acrylic resin, wherein the haze of the adhesive layer is 3% to 40%.

[0030] In order to enable those skilled in the art to better understand the features of the claimed invention, the detailed techniques implemented by the present invention and the above-mentioned preferred embodiments will be described in the following paragraphs in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1A A 3D schematic diagram of an optical film according to an embodiment of the present invention is shown;

[0032] Figure 1B shows a cross-sectional view of an optical film according to one embodiment of the present invention;

[0033] Figure 1C shows an enlarged cross-sectional view of an optical film according to one embodiment of the present invention;

[0034] Figure 2A A 3D schematic diagram of an optical film according to an embodiment of the present invention is shown;

[0035] Figure 2B shows a cross-sectional view of an optical film according to one embodiment of the present invention;

[0036] Figure 3A A 3D schematic diagram of an optical film according to an embodiment of the present invention is shown;

[0037] Figure 3B A cross-sectional schematic diagram of an optical film according to an embodiment of the present invention is shown;

[0038] Figure 3CA cross-sectional schematic diagram of an optical film according to an embodiment of the present invention is shown;

[0039] Figure 4A A 3D schematic diagram of a composite optical film according to an embodiment of the present invention is shown;

[0040] Figure 4B A cross-sectional schematic diagram of a composite optical film according to an embodiment of the present invention is shown;

[0041] Figure 4C A cross-sectional schematic diagram of a composite optical film according to an embodiment of the present invention is shown;

[0042] Figure 5 A real picture of an optical film according to an embodiment of the present invention is shown;

[0043] Figure 6 A method for manufacturing an optical film according to an embodiment of the present invention is shown;

[0044] Figure 7 A comparison chart of friction test results between the prior art and the present invention is shown.

[0045] Explanation of the reference numerals: 100 - optical film; 101 - substrate; 102a, 102b, 102c - prisms; H1, H2, H3 - heights; 102aT - arc shape; 102aTP - highest point; HL - horizontal line; 101dp - diffusion particles; 101d - diffusion layer; TP - thickness of substrate; TT - total thickness of substrate and prisms; 200 - optical film; 150 - brightening film; 101 - substrate; 150a - prism; 160 - adhesive layer; 300 - composite optical film; 400 - composite optical film. DETAILED DESCRIPTION

[0046] Figure 1A A 3D schematic diagram of an optical film according to an embodiment of the present invention is shown; Figure 1B shows a cross-sectional view of an optical film according to one embodiment of the present invention; Figure 1CAn enlarged cross-sectional view of an optical film according to an embodiment of the present invention is shown, wherein the optical film 100 includes a substrate 101, wherein a plurality of prisms 102a, 102b are disposed on the substrate 101, wherein the plurality of prisms 102a, 102b include a first prism 102a and a second prism 102b adjacent to the first prism 102a, wherein a height H1 of the first prism 102a is greater than a height H2 of the second prism 102b, wherein the top of the outer surface of the first prism 102a includes an arc shape 102aT, and the arc shape 102aT includes a highest point 102aTP of the first prism 102a. The height H1 of the first prism 102a and the height H2 of the second prism 102b are relative to a horizontal line HL passing through a top surface of the substrate 101.

[0047] The difference between the first height H1 of the first prism 102 a and the second height H2 of the second prism 102 b is 0.5-5 μm.

[0048] The difference between the first height H1 of the first prism 102 a and the second height H2 of the second prism 102 b is 1-3 μm.

[0049] In one embodiment, the arc shape is a circular arc shape.

[0050] In one embodiment, the radius of the arc shape is 1-10 μm.

[0051] In one embodiment, the radius of the arc shape is 2-6 μm.

[0052] In one embodiment, Figure 1B As shown, the prism angle of the first prism 102a is 50-100 degrees.

[0053] In one embodiment, Figure 1B As shown, the first prism 102a has a prism angle in the range of 85-95 degrees.

[0054] In one embodiment, the second prism 102b has a triangular shape, and the prism angle is in the range of 50-100 degrees.

[0055] In one embodiment, the second prism 102b has a triangular shape, and the prism angle is in the range of 85-95 degrees.

[0056] In one embodiment, Figure 1B As shown, the pitch P between the first prism 102a and the second prism 102b is in the range of 45-55 μm.

[0057] In one embodiment, Figure 1B As shown, the total thickness TP of the substrate 101 is between 45 μm and 150 μm.

[0058] In one embodiment, Figure 1B As shown, the total thickness TT of the substrate 101 and the prisms 102 a is between 100 μm and 300 μm.

[0059] In one embodiment, Figure 1B As shown, the pitch P between the first prism 102a and the second prism 102b is in the range of 45-55 μm.

[0060] The lower surface of the substrate 101 is coated with an anti-reflection film.

[0061] The bottom surface of the substrate 101 is coated with a transparent resin.

[0062] The bottom surface of the substrate 101 is coated with a matte structure.

[0063] In one embodiment, a material including diffusion particles is coated on the bottom surface of the substrate 101 to form a matte structure on the bottom surface of the substrate 101 .

[0064] On the bottom surface of the substrate 101 , a matte structure is formed on the bottom surface of the substrate 101 .

[0065] In one embodiment, the haze of the haze surface structure is 2-60%, preferably 10-50%.

[0066] In one embodiment, Figure 1C As shown, a material including diffusion particles 101dp is coated on the bottom surface of the substrate 101 to form a diffusion layer 101d on the bottom surface of the substrate 101.

[0067] In one embodiment, the diffusion layer 101d includes a matte structure, wherein the haze of the matte structure is 2-60%, preferably 10-40%.

[0068] In one embodiment, the diffusion particles include organic particles, such as PMMA, PS, melamine, etc., wherein the haze of the diffusion layer formed by the diffusion particles is 2-60%. In one embodiment, the haze of the diffusion layer formed by the diffusion particles is 2-60% or 10-40%.

[0069] In one embodiment, the diffusion particles include organic particles, such as PMMA, PS, melamine, etc., or inorganic particles, such as silicon, SiO2, TiO2, CaCO3, Al2O3, ZrO2, etc., or a mixture of organic particles. The haze of the diffusion layer formed by the diffusion particles can be 2-60%, preferably 10-40%.

[0070] In one embodiment, a mist structure is formed on the bottom surface of the substrate 101 by rolling, and the haze of the mist structure may be 2-60%, preferably 10-50%.

[0071] The bottom surface of 101 is coated with a high light transmittance hard coating, which has a low refractive index and can be formed by a light-curing or heat-curing acrylic resin. The thickness of the high light transmittance hard coating is between 1 and 8 um, preferably between 2 and 5 um.

[0072] In one embodiment, the first substrate comprises at least one of PET (polyethylene terephthalate), PEN (polyethylene naphthate), PAR (polyacrylate), PC (polycarbonate), or TAC (cellulose triacetate).

[0073] In one embodiment, the lower prism structure may be triangular or semicircular, and the tip structure may be a wavy structure with a height difference or swaying left and right.

[0074] In one embodiment, the lower prism structure is a triangle, and the angle thereof is 50 to 100 degrees, preferably 85 to 95 degrees.

[0075] In one embodiment, two optical films 100 or 200 may be bonded into a single piece. The bonding material may be a thermosetting resin or a UV reactive resin. The thickness of the adhesive layer is controlled to be 0.5 to 1.5 um. The bonding may be physical bonding or chemical bonding, and the bonding force may be above 50 g / 25 mm.

[0076] In one embodiment, the adhesive can be attached using an adhesive without added particles (beads). It is also possible to use glue with added particles (beads) for adhesion.

[0077] In one embodiment, if diffusion particles such as beads are used for coating, the diffusion particles can be organic particles, such as PMMA, PS, melamine, etc., or inorganic particles, such as Silicon, SiO2, TiO2, CaCO3, Al2O3, ZrO2, etc. The atomization degree of the adhesive layer can be controlled at 1% to 60%, and the optimal range is 3 to 40%.

[0078] Figure 2A A 3D schematic diagram of an optical film according to an embodiment of the present invention is shown; Figure 2BA cross-sectional view of an optical film according to an embodiment of the present invention is shown, wherein the optical film 100 includes a substrate 101 and a plurality of prisms 102a, 102b, and 102c disposed on the substrate 101, wherein the plurality of prisms 102a, 102b, and 102c include a first prism 102a, a second prism 102b adjacent to the first prism 102a, and a second prism 102c adjacent to the second prism 102b, wherein a height H1 of the first prism 102a is greater than a height H2 of the second prism 102b, and the first height H1 of the first prism 102a is greater than a height H3 of the third prism 102c, wherein the top of the outer surface of the first prism 102a includes an arc shape 102aT, and the arc shape 102aT includes a highest point 102aTP of the first prism 102a. The height H1 of the first prism 102a and the height H2 of the second prism 102b are relative to a horizontal line HL passing through a top surface of the substrate 101. In one embodiment, the height H2 of the second prism 102 b is equal to the height H3 of the third prism 102 c .

[0079] Figure 3A A three-dimensional view of a composite optical film 300 according to an embodiment of the present invention is shown; Figure 3B The cross-sectional view of the composite optical film 300 in the embodiment of the present invention is schematically shown, wherein the composite optical film 300 comprises Figure 1A-Figure 1C The optical film 100 is shown; and the brightness enhancing film 150 .

[0080] In one embodiment, the brightness enhancement film 150 includes a substrate 101b and a plurality of prisms 150a on the substrate 101b, wherein an adhesive layer is disposed on the bottom surface of the optical film 100 , and the tops of the plurality of prisms 150a of the brightness enhancement film 150 are disposed in the adhesive layer 160 .

[0081] Figure 4A 4 shows a schematic three-dimensional view of a composite optical film 400 in one embodiment of the present invention; Figure 4B A cross-sectional schematic diagram of a composite optical film 400 is shown, wherein the composite optical film 400 includes Figure 2A An optical film 200 is shown; and a brightness enhancement film 150 .

[0082] In one embodiment, the brightness enhancement film 150 includes a substrate 101 b and a plurality of prisms 150 a located on the substrate 101 b , wherein the tops of the plurality of prisms 150 a are disposed inside the optical film 200 .

[0083] In one embodiment, the brightness enhancement film 150 includes a substrate 101b and a plurality of prisms 150a on the substrate 101b, wherein an adhesive layer is disposed on the bottom surface of the optical film 200 , and wherein tops of the plurality of prisms 150a of the brightness enhancement film 150 are disposed in the adhesive layer 160 .

[0084] The adhesive layer 160 may be made of a single / homogeneous material. Optionally, the single / homogeneous material may include light diffusing particles or may not include light diffusing particles. The thickness of the adhesive layer 160 may be 0.1 to 10 μm or 0.1 to 5 μm, preferably 0.1 to 2 μm, and more preferably 0.5 to 1 μm.

[0085] Figure 5 A real picture of an optical film according to an embodiment of the present invention is shown;

[0086] Figure 6 A method for manufacturing an optical film according to an embodiment of the present invention is shown, and various examples are described below.

[0087] Embodiment 1:

[0088] Step 1: Make a prism structure roller, prism groove spacing = 50μm. The prism structure follows the order of one high and one low, and the height difference between the high and low parts is 3μm. Apply fillet on the top of the high prism, with radius R = 4μm on the roller structure.

[0089] Step 2: Prepare the UV acrylic glue for forming the prism.

[0090] Step 3: UV acrylic glue was applied on the PET surface, and a prism structure was embossed with a roller to produce an optical film with a pitch of 50 μm, named JJR507FAD_R4, as shown in Table 1.

[0091] Embodiment 2:

[0092] Step 1: Make a prism structure roller, prism groove spacing = 50μm. The prism structure follows the order of one high and two low, and the height difference between the high and low parts is 3μm. Apply a fillet on the top of the high prism, with a radius R = 4μm on the roller structure.

[0093] Step 2: Prepare the UV acrylic glue for forming the prism.

[0094] Step 3: UV acrylic glue was applied on the PET surface, and a prism structure was embossed with a roller to produce an optical film with a pitch of 50 μm, named JJR507CFAD_R4, as shown in Table 1.

[0095] Embodiment 3:

[0096] The brightness enhancement film was laminated with the optical film produced in Example 1. During this lamination process, the tip of the brightness enhancement film was inserted into the optical film produced in Example 1.

[0097] Embodiment 4:

[0098] The brightness enhancement film was laminated with the optical film produced in Example 2. During this lamination process, the tip of the brightness enhancement film was inserted into the optical film produced in Example 2.

[0099] The present invention provides an optical product with a prism design with high and low relief combined with a rounded corner design. When combined with DBEF, it presents a structure consisting of three optical film layers.

[0100] The brightness analysis shows that, compared with the conventional product H507FAD (brightness 100.00%) developed using known technology, the JR507CFAD of Example 1 enhances scratch resistance and improves brightness by 1.1%. If the one high and two low prism design of Example 2 is adopted, and a rounded corner design (JJR507CFAD_R4) is adopted at the top of the high prism (R=4um), the brightness can be improved by 2.0% compared with the conventional product H507FAD, as shown in Table 1 below.

[0101] The present invention is an optical product with a prism design that has high and low relief combined with a rounded corner design. Figure 6 The friction test of DBEF5 tribofilm was carried out by the method shown. As the load increased to 500g and 1000g, the damage to the prism became more obvious. Figure 7 The friction test results of the prior art and the technology of the present invention are compared.

[0102] like Figure 7 As shown, taking Example 1 (JR507CFAD_R4) as an example, under a load of 500g, after a back and forth rubbing cycle, no scratches appeared on the prism. When the load was increased to 1000g, the prism began to show slight damage, which was not as obvious as the product made by the prior art under a load of 200g. This shows that the structure of Example 1 (JR507CFAD_R4) can effectively and significantly improve the scratch resistance of the prism. In addition, its brightness is also 1.1% higher than that of the traditional product H507FAD. For example, the structure JJR507CFAD_R4 of Example 2, after rubbing back and forth once under a load of 200g, no scratches appeared on the prism. When the load was increased to 500g and 1000g, the prism began to show extremely slight scratches, which were also less than the scratches on the product made by the prior art under a load of 200g. This shows that the structure JJR507CFAD_R4 of Example 2 can effectively and significantly improve the scratch resistance of the prism. In addition, its brightness is 2.0% higher than that of the H507FAD product manufactured with conventional technology.

[0103] Compared with the existing design, the present invention has the following characteristics: the top of the prism structure adopts a rounded corner design; the prisms are arranged in high and low positions; the brightness is not reduced; the scratch resistance is significantly enhanced; and the prisms remain intact after environmental tests such as thermal shock and vibration.

[0104] Table 1 Optical performance of height difference combined with lead angle design

[0105]

[0106] The above provision relates to its detailed technical content and inventive features. Those skilled in the art may make various modifications and substitutions according to the provision and suggestions of the present invention described without departing from the features of the present invention. However, although these modifications and substitutions are not fully provided in the above description, they are basically covered in the claims.

Claims

1. An optical film, It is characterized in that include: a first substrate; as well as A first plurality of prisms are disposed on a first substrate, wherein the first plurality of prisms include a first prism and a second prism adjacent to the first prism, wherein a first peak point of the first prism is higher than a second peak point of the second prism, wherein the top of the outer surface of the first prism includes an arc shape, and the arc shape includes a peak point of the first prism.

2. The optical film according to claim 1, It is characterized in that The arc shape is a circular arc shape.

3. The optical film according to claim 1, It is characterized in that A difference between a first height of the first prism and a second height of the second prism is 0.5 to 5 μm.

4. The optical film according to claim 4, It is characterized in that A difference between a first height of the first prism and a second height of the second prism is 1 to 3 μm.

5. The optical film according to claim 1, It is characterized in that The radius of the arc shape is 1 to 20 μm.

6. The optical film according to claim 4, It is characterized in that The radius of the arc shape is 2 to 6 μm.

7. The optical film according to claim 1, It is characterized in that The second prism has a triangular shape with a vertex angle ranging from 50 degrees to 100 degrees.

8. The optical film according to claim 1, It is characterized in that The second prism has a triangular shape with a vertex angle ranging from 85 degrees to 95 degrees.

9. The optical film according to claim 1, It is characterized in that The substrate is made of PET.

10. The optical film according to claim 1, It is characterized in that A photocurable acrylic resin is coated on the PET, wherein the plurality of prisms are formed in the photocurable acrylic resin and has a refractive index between 1.48 and 1.

80.

11. The optical film according to claim 1, It is characterized in that The multiple prisms include multiple first-type prisms and multiple second-type prisms, wherein the multiple first-type prisms and the multiple second-type prisms are arranged in an alternating manner, wherein the first highest point of the first-type prism is located higher than the second highest point, and wherein the top of the outer surface of the first-type prism includes an arc shape, which includes the highest point of the first-type prism.

12. The optical film according to claim 1, It is characterized in that The multiple prisms include multiple first-type prisms and multiple second-type prisms, wherein the first highest point of the first-type prisms is higher than the second highest point of the second-type prisms, wherein for every two adjacent first-type prisms, there are two second-type prisms between the two adjacent first-type prisms, and wherein the top of the outer surface of the first-type prism includes an arc shape, which includes the highest point of the first-type prism.

13. The optical film according to claim 1, It is characterized in that The lower surface of the substrate is coated with an anti-reflection film.

14. The optical film according to claim 1, It is characterized in that The anti-reflection film is formed of a photocurable acrylic resin or a thermally curable acrylic resin, wherein a thickness of the anti-reflection film is in a range of 1 μm to 8 μm.

15. The optical film according to claim 1, It is characterized in that The anti-reflection film is formed of a photocurable acrylic resin or a thermally curable acrylic resin, wherein a thickness of the anti-reflection film is in a range of 2 μm to 5 μm.

16. The optical film according to claim 1, It is characterized in that A matte structure is coated on the bottom surface of the first substrate.

17. The optical film according to claim 16, It is characterized in that The haze of the matte structure is 2-60%.

18. A composite optical film, It is characterized in that include: An optical film as claimed in claim 1; as well as A brightness enhancement film comprises a second plurality of prisms, wherein the brightness enhancement film is adhered to the optical film through an adhesive layer, wherein tops of the second plurality of prisms are immersed in the adhesive layer.

19. The composite optical film according to claim 18, It is characterized in that The adhesive layer is formed of a photocurable acrylic resin or a thermally curable acrylic resin, wherein the haze of the adhesive layer is 1% to 60%.

20. The composite optical film according to claim 18, It is characterized in that The adhesive layer is formed of a photocurable acrylic resin or a thermally curable acrylic resin, wherein the haze of the adhesive layer is 3 to 40%.

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