Anti-glare film and preparation method therefor
By adding a lens layer to the AG film substrate, which consists of multiple lenses of different diameters arranged without gaps, the problem of snowflakes appearing on the AG film in the module display is solved, achieving a high transmittance and high haze anti-glare effect.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- SUZHOU WEIYEDA TOUCH TECH
- Filing Date
- 2025-08-06
- Publication Date
- 2026-07-02
AI Technical Summary
The existing AG film produces snowflake-like spots when lit up on the module display, affecting the display effect, causing visual fatigue and dizziness, and harming vision health.
A lens layer is added to the substrate. The lens layer consists of multiple lenses of different diameters arranged without gaps. The sagitta and curvature of the lenses are random or uniform, forming an undulating reflective surface to improve the light scattering rate.
It eliminates the snowflake effect, improves transmittance and haze, and achieves a highly efficient anti-glare effect with a transmittance of 85% to 95% and a haze of 5% to 45%.
Smart Images
Figure CN2025112863_02072026_PF_FP_ABST
Abstract
Description
An anti-glare film and its preparation method Technical Field
[0001] This invention relates to the field of anti-glare technology, and in particular to an anti-glare film and its preparation method. Background Technology
[0002] Anti-glare film, also known as AG film, is a functional film with a coating process applied to the surface of PET film. It is widely used in displays, optical lenses, automotive glass, and other fields. Currently, the surface coating of AG film on the market involves adding particles of different sizes and densities to the optical material, which scatters light and causes irregular reflections of incident light on the uneven surface.
[0003] Due to factors such as production materials, environment, and spraying equipment, existing AG films sometimes exhibit varying degrees of "snow" or "snow" when applied to a module display and the module is turned on, affecting the visual quality of the displayed image. Prolonged viewing can cause eye strain, dizziness, and harm to vision. Technical issues
[0004] Due to factors such as production materials, environment, and spraying equipment, existing AG films sometimes exhibit varying degrees of "snow" or "snow" when applied to a module display and the module is turned on, affecting the visual quality of the displayed image. Prolonged viewing can cause eye strain, dizziness, and harm to vision. Technical solutions
[0005] The purpose of this invention is to provide an anti-glare film by adding a lens layer with an undulating reflective surface to the substrate, thereby improving the light scattering rate of the lens layer and achieving the effect of anti-glare. This eliminates the snowflake problem of traditional AG films and has the advantages of high transmittance and high haze.
[0006] The present invention provides an anti-glare film, comprising a substrate and a lens layer, wherein the lens layer comprises a plurality of lenses of different apertures arranged without gaps, the lenses having the same or different sagitta, and the plurality of lenses forming an undulating reflective surface.
[0007] Specifically, the aperture of the lens ranges from 2μm to 60μm, and the sagittal height of the lens ranges from 1μm to 30μm.
[0008] Specifically, the height difference of the lenses varies, ranging from 0.05μm to 20μm.
[0009] Specifically, each of the lenses has the same curvature and the same sagitta, or the curvature and sagitta of the lenses are random.
[0010] Specifically, when each lens has the same curvature and the same sagitta, the lenses have the same shape before overlapping; when the values of the curvature and sagitta of the lenses are random, at least some of the lenses have different shapes before overlapping.
[0011] Specifically, the lenses are arranged according to a first initial pattern, which is a regular mesh pattern composed of multiple regular polygons of equal size with interconnected sides. The center of each regular polygon in the first initial pattern is the center of each lens.
[0012] Specifically, the edges of any adjacent regular polygons coincide, and the first initial pattern is a honeycomb-shaped pattern, where the regular polygons are the shape of a cell in the honeycomb.
[0013] Specifically, the lenses are arranged according to a second initial pattern, which is a random mesh pattern composed of multiple polygons of unequal size with interconnected sides. The centroid of each polygon in the second initial pattern is the center of each lens, and the area of each lens is greater than the area of each polygon in the second initial pattern.
[0014] The present invention also provides a method for preparing an anti-glare film, wherein the method is used to manufacture the anti-glare film described in any one of the above-mentioned methods, and the method includes:
[0015] Provide base materials;
[0016] Using the surface of the substrate as the bearing surface, an adhesive layer is formed on the bearing surface;
[0017] A lens is formed by pressing a lens onto the surface of the adhesive layer away from the substrate using a lens mold.
[0018] Specifically, the method for preparing the lens mold includes:
[0019] Provide substrate;
[0020] Photoresist is coated on the substrate, and the lens mold is formed by photolithography, development, and metal growth on the side of the photoresist away from the substrate, according to the designed lens image.
[0021] Specifically, the design of the lens image includes:
[0022] The lens image is a first initial pattern, which is a mesh pattern composed of regular polygons of equal size with interconnected sides.
[0023] Specifically, the design of the lens image includes:
[0024] The lens image is a second initial pattern, which is a random mesh pattern composed of multiple polygons of unequal size with interconnected sides; the second initial pattern is obtained by means of:
[0025] A mesh pattern composed of regular polygons of equal size and interconnected sides is used as the first initial pattern. The vertices of each regular polygon in the first initial pattern are used as the vertices of the first initial pattern. The vertices of the first initial pattern are displaced in random directions on their respective surfaces to form the vertices of the second initial pattern, with the displacement amplitude ≤ the side length of the regular polygon / 2. Adjacent vertices of the second initial pattern are connected to form the second initial pattern.
[0026] Specifically, the sagittal height of the lens within the lens layer ranges from 1μm to 30μm, the aperture of the lens ranges from 2μm to 60μm, and the height difference of the lens ranges from 0.05μm to 20μm. Beneficial effects
[0027] The anti-glare film of this invention improves the light scattering rate of the lens layer by adding a lens layer with an undulating reflective surface to the substrate, thereby achieving the effect of anti-glare. It eliminates the snowflake problem of traditional AG films and has the advantages of high transmittance and high haze. Attached Figure Description
[0028] Figure 1 is a schematic diagram of the structure of the anti-glare film in the first embodiment of the present invention.
[0029] Figure 2 is a side cross-sectional view of the anti-glare film in the first embodiment of the present invention.
[0030] Figure 3 is a schematic diagram of the structure of the first initial pattern in the first embodiment of the present invention.
[0031] Figure 4 is a schematic diagram of the structure of the second initial pattern in the first embodiment of the present invention.
[0032] Figure 5 is a schematic diagram of the lens layer structure in the first embodiment of the present invention.
[0033] Figure 6 is a magnified microscope image of the anti-glare film in the first embodiment of the present invention.
[0034] Figure 7 is a scanning image of the anti-glare film in the first embodiment of the present invention.
[0035] Figure 8 is a schematic diagram of the structure of the anti-glare film in the second embodiment of the present invention.
[0036] Figure 9 is a schematic diagram of the lens layer in the second embodiment of the present invention.
[0037] Figure 10 is a schematic diagram of the structure of the first initial pattern and the lens layer in the fifth embodiment of the present invention.
[0038] Figure 11 is a magnified microscopic view of the anti-glare film in the sixth embodiment of the present invention.
[0039] Figure 12 is a scanning image of the anti-glare film in the sixth embodiment of the present invention.
[0040] In the above figures, the reference numerals for the embodiments of the present invention are as follows:
[0041] 100. Substrate.
[0042] 200. Lens; 210. Center point of the lens.
[0043] 300. Reflective surface.
[0044] 400, First initial pattern; 410, Vertex of the first initial pattern.
[0045] 500, Second initial pattern; 510, Vertex of the second initial pattern. Embodiments of the present invention
[0046] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. Based on the description of the present invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.
[0047] In the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.
[0048] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.
[0049] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.
[0050] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.
[0051] The following detailed description uses specific examples.
[0052] First Embodiment
[0053] As shown in Figures 1 to 7, the first embodiment of the present invention provides an anti-glare film, including a substrate 100 and a lens layer. The lens layer includes a plurality of lenses 200 with different apertures and arranged without gaps. The lenses 200 have the same or different sagitta, and the plurality of lenses 200 form an undulating reflective surface 300.
[0054] Specifically, in the first embodiment, the lenses 200 have the same sagittal height, and there are at least two lenses 200 with different aperture sizes. Multiple adjacent lenses 200 intersect to form an undulating reflective surface 300.
[0055] In this embodiment, the aperture of the lens 200 ranges from 2μm to 60μm, and the sagittal range of the lens 200 ranges from 1μm to 30μm.
[0056] In this embodiment, the height difference of the lens 200 is different, ranging from 0.05μm to 20μm.
[0057] Specifically, as shown in Figure 2, H1 in the attached figure represents the sagitta of lens 200, H2 represents the height difference after the lenses 200 are arranged, and I represents the effective aperture of lens 200. The dashed lines indicate the overlapping parts of adjacent lenses 200. The aperture of lens 200 is the effective aperture; the overlapping parts of the dashed lines are not included in the calculation. The smaller the overlapping parts of lenses 200, the larger the aperture. The maximum aperture is twice the maximum sagitta, and the minimum aperture is twice the minimum sagitta. The height difference of lenses 200 represents the degree of undulation of reflective surface 300. The greater the height difference, the greater the undulation of reflective surface 300, and the higher the light scattering rate of the lens layer. Reflective surface 300 faces away from substrate 100 and is used to reflect light incident on it back. The reflection of reflective surface 300 is diffuse reflection, which can achieve the effect of AG film.
[0058] Specifically, sagittal height refers to the vertical distance from the highest point on the surface of lens 200 to its bottom reference plane.
[0059] Specifically, the aperture (I) of lens 200 refers to the effective aperture of lens 200, that is, the diameter of the area where a single lens 200 actually participates in optical action (as shown by the solid line in Figure 2; the dashed line portion of the merged area of adjacent lenses 200 is not included). The larger the effective aperture, the larger the effective optical area of lens 200, and the stronger its light collection or scattering ability. The text mentions that "the smaller the intersecting part, the larger the aperture" because the merged area of adjacent lenses 200 (the part covered by the dashed line, also known as the overlapping area) occupies part of the aperture; the more they merge, the smaller the effective aperture.
[0060] Specifically, the height difference (H2) refers to the vertical height difference between the apex of lens 200 and the lowest point within the effective aperture area of lens 200, reflecting the degree of undulation of the lens 200 array.
[0061] The height difference directly affects the undulation of the reflective surface 300, which in turn affects the light scattering rate (the greater the undulation, the stronger the scattering).
[0062] Specifically, the curvature of lens 200 is a parameter that describes the degree of curvature of the surface of lens 200, and is usually expressed as radius of curvature (R) or curvature (1 / R).
[0063] The greater the curvature (the smaller the radius of curvature), the greater the sagitta, and the more "convex" the lens 200. Curvature affects the angle of refraction / scattering of light, which in turn relates to the anti-glare effect of the AG film.
[0064] Each lens 200 has the same curvature and the same sagitta, or the curvature and sagitta of each lens 200 are random. In this embodiment, each lens 200 has the same curvature and the same sagitta.
[0065] When each lens 200 has the same curvature and the same sagittal height, the shapes of the lenses 200 before overlapping are the same; when the values of curvature and sagittal height of the lenses 200 are random, at least some of the lenses 200 will have different shapes before overlapping. In this embodiment, when each lens 200 has the same curvature and the same sagittal height, the shapes of each lens 200 before overlapping are the same.
[0066] In this embodiment, the lenses 200 are arranged according to the second initial pattern 500, which is a random mesh pattern composed of multiple polygons of different sizes with their sides connected to each other. The centroid of each polygon in the second initial pattern 500 is the center of each lens 200, and the area of each lens 200 is greater than the area of each polygon in the second initial pattern 500.
[0067] Specifically, in the first embodiment, the positional distribution of the lens 200 is determined by the second initial pattern 500, and the process of determining the positional distribution of the lens 200 is as follows:
[0068] First, a first initial pattern 400 as shown in Figure 3 is drawn. The first initial pattern 400 is a regular mesh pattern composed of multiple regular polygons of equal size with interconnected sides. The regular polygons need to meet the conditions of being of equal size and having interconnected sides, such as regular hexagons or squares, preferably the regular hexagons used in this embodiment. The vertices 410 of the first initial pattern are the vertices of all polygons within the first initial pattern 400, and only one vertex is taken if some vertices overlap.
[0069] Then, each vertex 410 of the first initial pattern is displaced along a random direction on the surface where the first initial pattern 400 is located to form the vertex 510 of the second initial pattern, with the displacement amplitude ≤ the side length of the regular polygon / 2. This can be understood as drawing a circle with the side length of the regular polygon / 2 as the radius and the vertex 410 of the first initial pattern as the center, and the vertices 510 of the second initial pattern are randomly distributed inside this circle or on the side length of the circle.
[0070] Then, adjacent vertices 510 of the second initial pattern are connected to form the second initial pattern 500 as shown in Figure 4. The second initial pattern 500 is a random mesh pattern composed of multiple polygons (hexagons) of unequal size with interconnected sides. Since the vertices 510 of the second initial pattern are random, the second initial pattern 500 is also random, and the shape and size of each polygon are not necessarily the same.
[0071] Then, as shown in Figure 4, a lens 200 (i.e., the lens 200 in Figure 4) is arranged with the centroid of the largest polygon in the second initial pattern 500 as the lens center point 210. The area of this lens 200 is larger than the area of the largest polygon, that is, the area of the lens 200 is the area of the circumcircle of the largest polygon, which can completely cover the largest polygon.
[0072] Finally, as shown in Figure 5, the centroids of each polygon in the second initial pattern 500 are marked. Multiple lenses 200 of the size shown in Figure 4 are arranged with the centroids of each polygon in the second initial pattern 500 as lens center points 210, and the positions of the lenses 200 are randomly distributed. Since the area of each lens 200 is larger than the area of the largest polygon, it is certainly also larger than the areas of other smaller polygons, ensuring that each lens 200 can cover the polygon it belongs to.
[0073] In this embodiment, the sides of any adjacent regular polygons overlap, and the first initial pattern 400 is a honeycomb-shaped pattern, where the regular polygons are the shape of a cell in the honeycomb.
[0074] In this embodiment, each lens 200 has the same curvature, the same height, and the same size. Before overlapping, the lenses 200 have the same shape. Since each lens 200 in Figure 4 ensures coverage of the largest polygon, it also ensures coverage of the smaller polygons. The lenses 200 overlap without gaps. Adjacent lenses 200 intersect to form a lens layer, and each lens 200 has the same radius and height. Because the position of each lens 200 is random, the distance between lenses 200 is also random, and the overlapping portion of each lens 200 is different, the aperture of each lens 200 is different, and the height difference after arrangement is also different. This results in a higher light scattering rate on the reflecting surface 300 and better diffuse reflection.
[0075] Figure 6 shows a magnified microscopic image of the anti-glare film in the first embodiment of the present invention. It can be observed that the position of the lens 200 follows the random distribution of the second initial pattern 500, and the aperture of the lens 200 is random. Figure 7 shows a scanning image of the anti-glare film in the first embodiment of the present invention. It can be observed that the reflective surface 300 has a high degree of undulation and good diffuse reflection effect.
[0076] This invention also provides a method for preparing an anti-glare film. The method is used to manufacture the anti-glare film of the first embodiment described above. The preparation method includes:
[0077] Provide substrate 100;
[0078] Using the surface of the substrate 100 as the bearing surface, an adhesive layer is formed on the bearing surface;
[0079] Lens 200 is formed by pressing a lens onto the surface of the adhesive layer away from the substrate 100 using a lens mold.
[0080] Specifically, the substrate 100 can be made of materials such as PET, PI, or PC, and the adhesive layer is formed after UV curing and shaping, with a thickness between 5μm and 500μm.
[0081] Optionally, the positions of the lenses 200 can be regularly or randomly distributed, and the size and shape (curvature, sagitta, and overall shape) of the lenses 200 can be random or identical. When the curvature and sagitta of each lens 200 are the same, the shapes of the lenses 200 before overlapping are identical; when the values of the curvature and sagitta of the lenses 200 are random, at least some of the lenses 200 will have different shapes before overlapping. In this embodiment, the positions of the lenses 200 are randomly distributed, the size and shape (curvature, sagitta, and overall shape) of the lenses 200 are identical, and the shapes of the lenses 200 before overlapping are identical.
[0082] In this embodiment, the sagittal height of the lens 200 within the lens layer ranges from 1μm to 30μm, the aperture of the lens 200 ranges from 2μm to 60μm, and the height difference of the lens 200 ranges from 0.05μm to 20μm.
[0083] In this embodiment, the method for preparing the lens mold includes:
[0084] Provide substrate;
[0085] Photoresist is coated on a substrate. On the side of the photoresist away from the substrate, a lens mold is formed by photolithography, development, and metal growth according to the designed lens image.
[0086] In this embodiment, the design of the lens image includes:
[0087] The lens image is a second initial pattern 500, which is a random mesh pattern composed of multiple polygons of unequal size with their sides connected to each other.
[0088] The methods for obtaining the second initial pattern 500 include:
[0089] A mesh pattern composed of regular polygons of equal size and interconnected sides is used as the first initial pattern 400. The vertices of each regular polygon in the first initial pattern 400 are used as the first initial pattern vertices 410. The first initial pattern vertices 410 are displaced along a random direction on their respective surfaces to form the second initial pattern vertices 510, with the displacement amplitude ≤ the side length of the regular polygon / 2. Adjacent second initial pattern vertices 510 are connected to form the second initial pattern 500.
[0090] Specifically, the second initial pattern 500 is a random mesh pattern composed of multiple polygons of unequal size with interconnected sides. Lenses 200 are arranged with the centroid of each polygon in the second initial pattern 500 as the lens center point 210. Each lens 200 has the same curvature and the same sagitta. The area of each lens 200 is larger than the area of each polygon in the second initial pattern 500.
[0091] Second Embodiment
[0092] As shown in Figures 8 and 9, the second embodiment of the present invention provides an anti-glare film, the structure of which is generally the same as that of the first embodiment, except for the size of the lens 200.
[0093] In the second embodiment, both the first initial pattern 400 and the second initial pattern 500 are consistent with those in the first embodiment. The centroid of each polygon in the second initial pattern 500 is the center of each lens 200. The difference is that when arranging the lenses 200, the size of each lens 200 is not necessarily the same and has randomness. The area of each lens 200 is greater than the area of the polygon in the second initial pattern 500 where the lens center point 210 is located. That is, the area of the lens 200 is the area of the circumcircle of the corresponding polygon, which can completely cover the polygon.
[0094] In this embodiment, the lenses 200 have different apertures, different heights, and different curvatures. The curvature and height of the lenses 200 are random, and the size of each lens 200 is not necessarily the same. At least some of the lenses 200 have different shapes before overlapping. The positions of the lenses 200 are randomly distributed, and the size and shape of the lenses 200 are also random. Therefore, the degree of undulation of the reflecting surface 300 in the second embodiment is greater than that in the first embodiment, the height difference of the lenses 200 is also greater, the light scattering rate of the reflecting surface 300 is higher, and the diffuse reflection effect is better.
[0095] Third Embodiment
[0096] The third embodiment of the present invention provides an anti-glare film, which has a structure that is generally the same as that of the second embodiment, except for the position distribution of the lens 200.
[0097] The first initial pattern 400 in the third embodiment is the same as that in the second embodiment, with regular hexagonal polygons. The difference is that the center of each regular polygon in the first initial pattern 400 is the center of each lens 200. When arranging the lenses 200, the size of each lens 200 is not necessarily the same and has randomness. Optionally, in this embodiment, the area of the lens 200 is determined using the method in the second embodiment, that is, the area of each lens 200 is larger than the area of the polygon in the second initial pattern 500 where the lens center point 210 is located. That is, the area of the lens 200 is the area of the circumcircle of the corresponding polygon, which can completely cover the polygon. However, compared to the second embodiment, the position of the lens center point 210 is changed from the centroid of each polygon in the second initial pattern 500 to the center of each regular polygon in the first initial pattern 400.
[0098] In this embodiment, the lenses 200 have different apertures, different heights, and different curvatures. The curvature and height of the lenses 200 are random, and the size of each lens 200 is not necessarily the same. At least some of the lenses 200 have different shapes before overlapping. Although the positions of the lenses 200 are regularly distributed, the size and shape of the lenses 200 are random. Therefore, in the third embodiment, the reflective surface 300 has a large degree of undulation, the height difference of the lenses 200 is also large, the light scattering rate of the reflective surface 300 is high, and the diffuse reflection effect is good.
[0099] The present invention also provides a method for preparing an anti-glare film. This method is used to manufacture the anti-glare film as described in the third embodiment above. The preparation method includes:
[0100] Provide substrate 100;
[0101] Using the surface of the substrate 100 as the bearing surface, an adhesive layer is formed on the bearing surface;
[0102] Lens 200 is formed by pressing a lens onto the surface of the adhesive layer away from the substrate 100 using a lens mold.
[0103] Specifically, the substrate 100 can be made of materials such as PET, PI, or PC, and the adhesive layer is formed after UV curing and shaping, with a thickness between 5μm and 500μm.
[0104] Optionally, the positions of the lenses 200 are either regularly distributed or randomly distributed, and the size and shape (curvature, sagitta, and overall shape) of the lenses 200 are either random or identical. When the curvature and sagitta of each lens 200 are the same, the shapes of the lenses 200 before overlapping are identical; when the values of the curvature and sagitta of the lenses 200 are random, at least some of the lenses 200 will have different shapes before overlapping. In this embodiment, the positions of the lenses 200 are regularly distributed, the size and shape (curvature, sagitta, and overall shape) of the lenses 200 are random, and at least some of the lenses 200 will have different shapes before overlapping.
[0105] In this embodiment, the sagittal height of the lens 200 within the lens layer ranges from 1μm to 30μm, the aperture of the lens 200 ranges from 2μm to 60μm, and the height difference of the lens 200 ranges from 0.05μm to 20μm.
[0106] In this embodiment, the method for preparing the lens mold includes:
[0107] Provide substrate;
[0108] Photoresist is coated on a substrate. On the side of the photoresist away from the substrate, a lens mold is formed by photolithography, development, and metal growth according to the designed lens image.
[0109] In this embodiment, the design of the lens image includes:
[0110] The lens image is a first initial pattern 400, which is a mesh pattern composed of regular polygons of equal size with interconnected sides.
[0111] Specifically, the lens 200 is filled with the center point 210 of each polygon in the first initial pattern 400 as the lens center point. The curvature and sag of each lens 200 are random. The area of each lens 200 is larger than the area of each regular polygon in the first initial pattern 500.
[0112] Fourth embodiment
[0113] The fourth embodiment of the present invention provides an anti-glare film, which has a structure that is generally the same as that of the first embodiment, except for the position distribution of the lens 200.
[0114] The first initial pattern 400 in the fourth embodiment is the same as that in the first embodiment, with regular polygons being regular hexagons. The difference is that the center of each regular polygon in the first initial pattern 400 is the center of each lens 200. When arranging the lenses 200, each lens 200 has the same area, the same curvature, and the same sagitta.
[0115] Optionally, in this embodiment, the area of the lens 200 is determined using the method in the first embodiment, that is, a lens 200 is arranged with the centroid of the largest polygon in the second initial pattern 500 as the lens center point 210. The area of this lens 200 is larger than the area of the largest polygon, that is, the area of the lens 200 is the area of the circumcircle of the largest polygon, which can completely cover the largest polygon. However, compared with the first embodiment, the position of the lens center point 210 is changed from the centroid of each polygon in the second initial pattern 500 to the center of each regular polygon in the first initial pattern 400. Although the positions of the lenses 200 are regularly distributed and the size of the lenses 200 is the same, due to the intersection and overlap between the lenses 200, the undulation of the reflecting surface 300 in the fourth embodiment is large, the height difference of the lenses 200 is also large, the light scattering rate of the reflecting surface 300 is high, and the diffuse reflection effect is good.
[0116] Fifth embodiment
[0117] As shown in Figure 10, the fifth embodiment of the present invention provides an anti-glare film, which has a structure that is generally the same as that of the third embodiment, except for the position distribution of the lens 200 and the size of the lens 200.
[0118] In this embodiment, the lenses 200 are arranged according to a first initial pattern 400. The first initial pattern 400 is a regular mesh pattern composed of multiple regular polygons of equal size with their sides connected to each other. The center of each regular polygon in the first initial pattern 400 is the center of each lens 200.
[0119] In this embodiment, the positional distribution of the lenses 200 is determined by the first initial pattern 400, and the process of determining the positional distribution of the lenses 200 is as follows:
[0120] First, a first initial pattern 400 as shown in Figure 10 is drawn. The first initial pattern 400 is a regular mesh pattern composed of multiple regular polygons of equal size with all sides connected to each other. The regular polygons need to meet the conditions of being of equal size and having all sides connected to each other, such as regular hexagons or squares. In this embodiment, a square is used.
[0121] Then, mark the center of each regular polygon in the first initial pattern 400.
[0122] Finally, as shown in Figure 10, multiple lenses 200 are arranged with the center of each regular polygon in the first initial pattern 400 as the lens center point 210. Adjacent lenses 200 intersect to form the shape of a lens layer. The size and shape of each lens 200 are not necessarily the same and have randomness. Optionally, in this embodiment, the area of the lens 200 is determined using the method in the second embodiment, that is, the area of each lens 200 is larger than the area of the polygon in the second initial pattern 500 where the lens center point 210 is located. That is, the area of the lens 200 is the area of the circumcircle of the corresponding polygon, which can completely cover the polygon. Optionally, the size and shape of the lens 200 can also be the same as in the fourth embodiment, with each lens 200 having the same area, curvature, and height. In this embodiment, the values of curvature and height of the lens 200 are random, and the shape of each lens 200 is different. Moreover, the radius of each lens 200 is also random, further increasing the undulation of the reflecting surface 300.
[0123] In this embodiment, although the positions of the lenses 200 are regularly distributed, the size and shape of the lenses 200 are random, so the tangent part of each lens 200 is different. Therefore, the aperture and height difference of each lens 200 are different, the light scattering rate of the reflecting surface 300 is high, and the diffuse reflection effect is good.
[0124] Sixth Embodiment
[0125] As shown in Figures 11 and 12, the sixth embodiment of the present invention provides an anti-glare film, which has a structure that is generally the same as that of the first embodiment, except for the position distribution of the lens 200 and the size of the lens 200.
[0126] The first initial pattern 400 in the sixth embodiment is the same as that in the fifth embodiment, and is a regular mesh pattern composed of multiple squares of equal size with interconnected sides. Then, according to the method in the first embodiment, a second initial pattern 500 is generated based on it, where the centroid of each polygon in the second initial pattern 500 is the center of each lens 200. The second initial pattern 500 is a random mesh pattern composed of multiple polygons (quadrilaterals) of unequal size with interconnected sides.
[0127] Then, a lens 200 is arranged with the centroid of the largest polygon in the second initial pattern 500 as the lens center point 210. The area of this lens 200 is larger than the area of the largest polygon, that is, the area of the lens 200 is the area of the circumcircle of the largest polygon, which can completely cover the largest polygon.
[0128] Finally, mark the centroid of each polygon in the second initial pattern 500. Arrange multiple lenses 200 of the same size with the centroid of each polygon in the second initial pattern 500 as the lens center point 210, and the positions of the lenses 200 are randomly distributed. Since the area of each lens 200 is larger than the area of the largest polygon, it is certainly also larger than the areas of other smaller polygons, ensuring that each lens 200 can cover the polygon it belongs to. Optionally, the size and shape of each lens 200 may not be the same, exhibiting randomness.
[0129] In this embodiment, each lens 200 has the same curvature, the same height, and the same size. Before overlapping, the lenses 200 have the same shape. Since the lenses 200 ensure coverage of the largest polygon, they also ensure coverage of the smaller polygons. The lenses 200 overlap without gaps. Adjacent lenses 200 intersect to form a lens layer, and each lens 200 has the same radius and height. Because the position of each lens 200 is random, the distance between lenses 200 is also random, and the overlapping portion of each lens 200 is different, the aperture of each lens 200 is different, and the height difference after arrangement is also different. This results in a higher light scattering rate on the reflecting surface 300 and better diffuse reflection.
[0130] Figure 11 shows a magnified microscopic image of the anti-glare film in the sixth embodiment of the present invention. It can be observed that the position of the lens 200 follows the random distribution of the second initial pattern 500, and the aperture of the lens 200 is random. Figure 12 shows a scanning image of the anti-glare film in the sixth embodiment of the present invention. It can be observed that the reflective surface 300 has a high degree of undulation and good diffuse reflection effect.
[0131] Experimental tests were conducted on the above six embodiments. When the position distribution of the lens 200 is randomized and the sagitta and aperture of the lens 200 are randomly generated, the measured data of the anti-glare film are as follows:
[0132]
[0133] As can be seen, the anti-glare film made by randomly distributing the positions of lenses 200 and randomly generating the sagitta and aperture of lenses 200 has the advantages of high transmittance and high haze.
[0134] In summary, the anti-glare film of the present invention improves the light scattering rate of the lens layer by adding a lens layer with an undulating reflective surface to the substrate, thereby achieving the effect of anti-glare. It eliminates the snowflake problem of traditional AG films and has the advantages of high transmittance and high haze, achieving a haze of 5%–45% and a light transmittance of 85%–95%.
[0135] Optionally, there are two scenarios for the lenses: one is that all lenses within the lens layer have the same curvature and sagitta, and each lens has the same shape before overlapping; the other is that the curvature and sagitta of all lenses within the lens layer are randomized, and all lenses have different curvatures and sagittas, with at least some lenses having different shapes before overlapping. This increases the undulation of the reflecting surface (i.e., increases the height difference between lenses), further improving light scattering and haze.
[0136] Optionally, the lens position distribution includes two types: a regular distribution with the center of the regular polygon of the first initial pattern as the lens center and a random distribution with the centroid of the polygon of the second initial pattern as the lens center. Combined with lenses of different aperture sizes, this increases the undulation of the reflecting surface (i.e., increases the height difference between lenses), further improving the light scattering rate and haze.
[0137] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.
Claims
1. An anti-glare film characterized by, It includes a substrate (100) and a lens layer, the lens layer including a plurality of lenses (200) of different apertures arranged without gaps, the lenses (200) having the same or different sagitta, and the plurality of lenses (200) forming an undulating reflective surface (300).
2. The anti-glare film according to claim 1, wherein The aperture of the lens (200) ranges from 2μm to 60μm, and the sagittal range of the lens (200) is from 1μm to 30μm.
3. The anti-glare film according to claim 1, wherein The lenses (200) have different height differences, ranging from 0.05μm to 20μm.
4. The anti-glare film according to claim 1, wherein Each of the lenses (200) has the same curvature and the same sagitta, or the curvature and sagitta of the lenses (200) are random.
5. The anti-glare film according to claim 4, wherein When each of the lenses (200) has the same curvature and the same sagitta, the lenses (200) have the same shape before they overlap; when the curvature and sagitta of the lenses (200) are random, at least some of the lenses (200) have different shapes before they overlap.
6. The anti-glare film according to claim 4, wherein The lenses (200) are arranged according to a first initial pattern (400), which is a regular mesh pattern composed of multiple regular polygons of equal size with their sides connected to each other. The center of each regular polygon in the first initial pattern (400) is the center of each lens (200).
7. The anti-glare film according to claim 6, wherein Any adjacent regular polygons have overlapping sides, and the first initial pattern (400) is a honeycomb-shaped pattern, where the regular polygon is the shape of a cell in the honeycomb.
8. The anti-glare film according to claim 4, wherein The lenses (200) are arranged according to a second initial pattern (500), which is a random mesh pattern composed of multiple polygons of unequal size with their sides connected to each other. The centroid of each polygon in the second initial pattern (500) is the center of each lens (200), and the area of each lens (200) is greater than the area of each polygon in the second initial pattern (500).
9. A method of producing an anti-glare film, characterized by, The method for preparing the anti-glare film is used to manufacture the anti-glare film according to any one of claims 1 to 8, and the method includes: Provide substrate (100); Using the surface of the substrate (100) as the bearing surface, an adhesive layer is formed on the bearing surface; A lens (200) is formed by pressing a lens onto the surface of the adhesive layer away from the substrate (100) using a lens mold.
10. The method for preparing the anti-glare film as described in claim 9, characterized in that, The method for preparing the lens mold includes: Provide substrate; Photoresist is coated on the substrate, and the lens mold is formed by photolithography, development, and metal growth on the side of the photoresist away from the substrate, according to the designed lens image.
11. The method for preparing the anti-glare film as described in claim 10, characterized in that, The design of the lens image includes: The lens image is a first initial pattern (400), which is a mesh pattern composed of regular polygons of equal size with interconnected sides.
12. The method for preparing the anti-glare film as described in claim 10, characterized in that, The design of the lens image includes: The lens image is a second initial pattern (500), which is a random mesh pattern composed of multiple polygons of unequal size with interconnected sides; the second initial pattern (500) is obtained by means of: A mesh pattern composed of regular polygons of equal size and interconnected sides is used as the first initial pattern (400). The vertices of each regular polygon in the first initial pattern (400) are used as the first initial pattern vertices (410). The first initial pattern vertices (410) are displaced along random directions on their respective surfaces to form the second initial pattern vertices (510). The displacement amplitude is ≤ the side length of the regular polygon / 2. Connect adjacent vertices (510) of the second initial pattern to form the second initial pattern (500).
13. The method for preparing the anti-glare film as described in claim 9, characterized in that, The sagittal range of the inner lens (200) of the lens layer is 1μm~30μm, the aperture range of the lens (200) is 2μm~60μm, and the height difference range of the lens (200) is 0.05μm~20μm.