Light guide decorative film

Abstract

This invention relates to a light-guiding decorative film. The light-guiding decorative film includes a substrate layer and light-guiding layers and optical decorative layers located on both sides of the substrate layer. When no light rays emerge from the light-guiding layers and reach the optical decorative layers, the light-guiding decorative film displays the effect of the optical decorative layers. When light rays emerge from the light-guiding layers and reach the optical decorative layers, the light-guiding decorative film displays the effect of the light-guiding layers while also possessing the effect of the optical decorative layers. Because the light-guiding decorative film of this invention can simultaneously achieve both light-guiding pattern functionality and decorative performance, it has broad application prospects in fields such as optoelectronic materials, optical engineering, and thin-film technology.

Description

Technical Field

[0001] This invention relates to the field of display decoration technology, and in particular to a light guide decorative film. Background Technology

[0002] Optoelectronic materials, optical engineering, and thin film technology are important research areas in modern science and technology, involving the transmission, control, and utilization of light. Among these, light guide films and optical decorative films are two important thin film materials with wide applications in optoelectronic devices, displays, and lighting equipment. The main function of light guide films is to uniformly distribute light, while decorative films are primarily used for aesthetics and decoration. However, the combination of these two is currently lacking in the field of display decoration. Summary of the Invention

[0003] Therefore, it is necessary to provide a light guide decorative film that can take into account both the light guide pattern function and the decorative performance.

[0004] A light-guiding decorative film, the light-guiding decorative film comprising a substrate layer and a light-guiding layer and an optical decorative layer located on both sides of the substrate layer;

[0005] When no light is emitted from the light guide layer to the optical decorative layer, the light guide decorative film displays the effect of the optical decorative layer; when light is emitted from the light guide layer to the optical decorative layer, the light guide decorative film displays the effect of the light guide layer and also has the effect of the optical decorative layer.

[0006] In one feasible implementation, the optical decorative layer includes a micro / nano structure layer and a decorative coating, the decorative coating being located on the side of the micro / nano structure layer away from the substrate layer; the micro / nano structure layer includes a plurality of spaced-apart protrusions, with ink filling the spaces between adjacent protrusions.

[0007] In one feasible implementation, the protrusion structure is constructed as a cylinder and / or a polygonal prism, the protrusion structure having a dimension of 5 μm to 80 μm along the direction parallel to the surface of the substrate layer, and a dimension of 2 μm to 5 μm along the thickness direction of the substrate layer;

[0008] The thickness of the micro / nano structure layer is 3 μm to 10 μm, and the thickness of the decorative coating is 3 μm to 4 μm;

[0009] The decorative coating is a decorative wood grain coating, a technological textured graphic coating, or a semi-transparent colored paint coating.

[0010] In one feasible implementation, the optical decorative layer includes a micro / nano structure layer and a coating layer. The micro / nano structure layer includes a plurality of micro / nano structures capable of achieving texture effects, and the coating layer is disposed in a contoured manner on the side of the micro / nano structure layer away from the substrate layer.

[0011] In one feasible implementation, the thickness of the micro / nanostructure layer is 3μm to 10μm, the period of the micro / nanostructure is 300nm to 200μm, the depth of the micro / nanostructure is 50nm to 10μm, and the spacing between two adjacent micro / nanostructures is 0 to 198μm.

[0012] Along the thickness direction of the substrate layer, the cross-sectional shape of the micro / nano structure includes one or more of the following: rectangular, triangular, wavy, semi-circular, and stepped.

[0013] In one feasible implementation, the material of the coating layer includes one or more of silicon dioxide and indium, and the thickness of the coating layer is 80 nm to 260 nm.

[0014] In one feasible implementation, the optical decorative layer further includes a decorative coating layer located on the coating layer away from the substrate layer.

[0015] The thickness of the decorative coating is 3μm to 4μm;

[0016] The decorative coating is a decorative wood grain coating, a technological textured graphic coating, or a semi-transparent colored paint coating.

[0017] In one feasible implementation, the light guide layer includes a micro-nano light guide layer and a barrier layer. The surface of the micro-nano light guide layer away from the substrate layer is provided with a plurality of light guide microstructures, and the barrier layer is located on the side of the micro-nano light guide layer away from the substrate layer.

[0018] The barrier layer is made of one or more of silver paste and titanium dioxide;

[0019] The thickness of the barrier layer is 20% to 50% of the depth of the light-guiding microstructure;

[0020] The thickness of the barrier layer is 4μm to 5μm;

[0021] The thickness of the micro / nano light guide layer is 3μm to 10μm.

[0022] In one feasible implementation, the light guide layer further includes a low-refractive-index material layer located on the side of the barrier layer away from the substrate layer, and the refractive index of the low-refractive-index material layer is less than that of the micro / nano light guide layer.

[0023] In one feasible implementation, the light-guiding decorative film further includes a hardening layer located on the side of the optical decorative layer away from the substrate layer;

[0024] The thickness of the hardened layer is 3μm to 4μm.

[0025] The light-guiding decorative film of the present invention includes a light-guiding layer and an optical decorative layer, thus taking into account both the light-guiding pattern function and decorative performance, and has broad application prospects in fields such as optoelectronic materials, optical engineering and thin film technology. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the light-guiding decorative film according to the first embodiment of the present invention;

[0027] Figure 2 This is a diagram showing the non-light-guiding effect of the light-guiding decorative film according to the first embodiment of the present invention;

[0028] Figure 3 This is a diagram illustrating the light-guiding effect of the light-guiding decorative film according to the first embodiment of the present invention.

[0029] Figure 4 The light guide microstructures of different groove types according to one embodiment of the present invention include: (a) rectangular groove, (b) elliptical groove, (c) triangular groove, (d) trapezoidal groove, and (e) rhomboid groove.

[0030] Figure 5 This is a schematic diagram of the light-guiding decorative film according to the second embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the cross-sectional shape of the micro / nano structure in the light-guiding decorative film according to the second embodiment of the present invention.

[0032] Figure 7 This is a diagram illustrating the non-light-guiding effect of the light-guiding decorative film according to the second embodiment of the present invention.

[0033] Figure 8 This is a light-guiding effect diagram of the light-guiding decorative film according to the second embodiment of the present invention;

[0034] Figure 9 This is a schematic diagram of the light-guiding decorative film according to the third embodiment of the present invention. Detailed Implementation

[0035] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] Please see Figure 1 The light-guiding decorative film 100 of the first embodiment of the present invention includes a substrate layer 110 and a light-guiding layer 120 and an optical decorative layer 130 located on both sides of the substrate layer 110.

[0039] Among them, the substrate layer 110 is a transparent substrate, which can be a transparent film with high light transmittance, requiring a transmittance of over 90%, such as PC (polycarbonate) or PET (polyethylene terephthalate).

[0040] The light guide layer 120 is used to change the direction of light emission and to emit light onto the front optical decorative layer 130.

[0041] In the light-guiding decorative film 100 of this embodiment, the optical decorative layer 130 includes a micro / nano structure layer 131 and a decorative coating 132. The decorative coating 132 is located on the side of the micro / nano structure layer 131 away from the substrate layer 110. The micro / nano structure layer 131 includes a plurality of spaced-apart protrusions 1311, and ink 1312 is filled between adjacent protrusions 1311. The ink 1312 serves to block light, preventing the pattern behind from being seen when no light is applied. When light is applied, the light mainly exits from the protrusions 1311.

[0042] in, Figure 1 The direction of the middle arrow indicates the direction of the light beam, which exits from the light guide layer 120 and reaches the optical decorative layer 130. Specifically, in the light guide decorative film 100 of this embodiment, as shown... Figure 1 The light emission direction is changed by the side light guiding microstructure 1211, and the light is incident on the front optical decorative layer 130, resulting in different effects for non-light guiding and light guiding. When no light rays emerge from the light guide layer 120 to the optical decorative layer 130, the light guide decorative film 100 displays the effect of the optical decorative layer 130, and the non-light guiding effect is as follows: Figure 2This example shows decorative coating 132 as a decorative wood grain coating, presenting a wood grain effect. In other embodiments, the transmittance and coating material of decorative coating 132 can be changed according to requirements. When light is emitted from light guide layer 120 to optical decorative layer 130, light guide decorative film 100 displays the effect of light guide layer 120, while also having the effect of optical decorative layer 130. At this time, the light guiding effect is as follows: Figure 3 This section shows a partial, unilateral light guide, creating a star-like light guide effect while also resembling wood grain. The light guide microstructures 1211 in the light guide layer 120 are arranged in a "star-like" pattern. It should be noted that in other embodiments, different light guide patterns can be achieved by changing the direction of the incident light.

[0043] Based on the foregoing embodiments, the protrusion structure 1311 is constructed as a cylinder and / or a polygonal prism. The dimension of the protrusion structure 1311 along the direction parallel to the surface of the substrate layer 110 is 5μm to 80μm, and the dimension of the protrusion structure 1311 along the thickness direction of the substrate layer 110 is 2μm to 5μm. Further, the dimension of the protrusion structure 1311 along the direction parallel to the surface of the substrate layer 110 may be, but is not limited to, 5μm, 10μm, 15μm, 20μm, 25μm, 30μm, 35μm, 40μm, 45μm, 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, or 80μm, and the dimension of the protrusion structure 1311 along the thickness direction of the substrate layer 110 may be, but is not limited to, 2μm, 3μm, 4μm, or 5μm.

[0044] Based on the aforementioned embodiments, the thickness of the micro / nano structure layer 131 is 3μm to 10μm, and the thickness of the decorative coating 132 is 3μm to 4μm; the decorative coating 132 is a decorative wood grain coating, a technological textured graphic coating, or a semi-transparent colored paint coating. Further, the thickness of the micro / nano structure layer 131 can be, but is not limited to, 3μm, 4μm, 5μm, 6μm, 7μm, 8μm, 9μm, or 10μm, and the thickness of the decorative coating 132 can be, but is not limited to, 3μm or 4μm.

[0045] Based on the aforementioned embodiments, the light guide layer 120 includes a micro / nano light guide layer 121 and a barrier layer 122. The surface of the micro / nano light guide layer 121 away from the substrate layer 110 is provided with a plurality of light guide microstructures 1211, and the barrier layer 122 is located on the side of the micro / nano light guide layer 121 away from the substrate layer 110. The light guide layer 120 uses UV transfer printing to transfer the light-guiding micro / nano structures onto a film. The structure formed after the transfer of the light-guiding micro / nano structures is the light guide microstructure 1211, which can achieve a light guiding effect. Simultaneously, when the light guide microstructures 1211 are arranged in a patterned manner, a patterned light guiding effect can be achieved. The barrier layer 122 can be obtained by filling the micro / nano light guide layer 121 with micro / nano paste, followed by heating and baking to stabilize it within the structure.

[0046] Based on the aforementioned embodiments, the density of the light guide microstructures 1211 gradually changes according to their distance from the light source; the closer the light guide microstructures 1211 are to the light source, the sparser their arrangement; the farther the light guide microstructures 1211 are from the light source, the denser their arrangement; the period of the light guide microstructures 1211 is 10μm to 200μm, and the depth of the light guide microstructures 1211 is 1μm to 10μm; such as Figure 4 As shown, the light guide microstructure 1211 may include one or more of the following patterns: rectangular groove, elliptical groove, triangular groove, trapezoidal groove, and rhomboid groove. This invention does not limit the groove shape of the light guide microstructure 1211.

[0047] Based on the aforementioned embodiments, the material of the barrier layer 122 includes one or more of silver paste and titanium dioxide, and the thickness of the barrier layer 122 is 20% to 50% of the depth of the light-guiding microstructure 1211. This avoids the light-guiding effect from being affected by overfilling or underfilling the grooves of the light-guiding microstructure 1211. Furthermore, the thickness of the barrier layer 122 can be, but is not limited to, 20%, 25%, 30%, 35%, 40%, 45%, or 50% of the depth of the light-guiding microstructure 1211.

[0048] Furthermore, the thickness of the barrier layer 122 is 4 μm to 5 μm. The thickness of the barrier layer 122 may be, but is not limited to, 4 μm, 4.5 μm or 5 μm.

[0049] Furthermore, the thickness of the micro / nano light guide layer 121 is 3 μm to 10 μm. The thickness of the micro / nano light guide layer 121 can be, but is not limited to, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm or 10 μm.

[0050] Based on the aforementioned embodiments, the light guide layer 120 of this embodiment further includes a low-refractive-index material layer 123. The low-refractive-index material layer 123 is located on the side of the barrier layer 122 away from the substrate layer 110, and the refractive index of the low-refractive-index material layer 123 is less than that of the micro / nano light guide layer 121. The low-refractive-index material layer 123 covers the surface of the barrier layer 122 to reduce light emission and protect the barrier layer 122. The specific material of the low-refractive-index material layer 123 is not limited in this invention. It should be noted that the low-refractive-index material layer may not be provided in the light guide decorative film of this invention.

[0051] Based on the aforementioned embodiments, the light-guiding decorative film 100 of this embodiment further includes a hardening layer 140, which is located on the side of the optical decorative layer 130 away from the substrate layer 110. The hardening layer 140 serves a protective function, improving scratch resistance. The hardening layer 140 can be a transparent ink, formed on one side of the optical decorative layer 130 by coating.

[0052] Furthermore, the thickness of the hardened layer 140 is 3μm to 4μm. The thickness of the hardened layer 140 can be, but is not limited to, 3μm, 3.5μm, or 4μm. It should be noted that the hardened layer may not be provided in the light-guiding decorative film of the present invention.

[0053] The light-guiding decorative film 100 of this embodiment displays the effect of the optical decorative layer 130 when not guiding light; for example, when the decorative coating 132 is a decorative wood grain coating, it presents a wood grain effect. When guiding light, it displays the effect of the light-guiding layer 120; when the light-guiding microstructures 1211 are arranged according to a pattern, it presents a patterned light-guiding effect; for example, when the light-guiding microstructures 1211 are arranged according to a "dotted" pattern, they present a dotted effect, while also possessing the wood grain effect of the decorative coating 132. Because it can combine the light-guiding pattern function and decorative performance, it has broad application prospects in fields such as optoelectronic materials, optical engineering, and thin film technology.

[0054] Please see Figure 5 The light-guiding decorative film 200 of the second embodiment of the present invention includes a substrate layer 210, a light-guiding layer 220 and an optical decorative layer 230 located on both sides of the substrate layer 210, and a hardening layer 240. The hardening layer 240 is located on the side of the optical decorative layer 230 away from the substrate layer 210.

[0055] In the light-guiding decorative film 200 of this embodiment, the light-guiding layer 220 includes a micro / nano light-guiding layer 221, a barrier layer 222, and a low-refractive-index material layer 223. The surface of the micro / nano light-guiding layer 221 away from the substrate layer 210 is provided with a plurality of light-guiding microstructures 2211, which can be arranged in a patterned manner. The barrier layer 222 is disposed on the side of the micro / nano light-guiding layer 221 away from the substrate layer 210. The low-refractive-index material layer 223 is located on the side of the barrier layer 222 away from the substrate layer 210, and the refractive index of the low-refractive-index material layer 223 is lower than that of the micro / nano light-guiding layer 221, thereby reducing light emission.

[0056] In the light guide decorative film 200 of this embodiment, the optical decorative layer 230 includes a micro-nano structure layer 231 and a coating layer 232. The micro-nano structure layer 231 includes a plurality of micro-nano structures 2311 that can achieve texture effects. The coating layer 232 is disposed in a contoured manner on the side of the micro-nano structure layer 231 away from the substrate layer 210.

[0057] The micro-nano structure can be transferred onto the film using UV transfer printing to achieve a textured effect, forming a micro-nano structure layer 231. The coating layer 232 can achieve brightening and transparency enhancement functions and can be prepared using vapor deposition or vacuum sputtering processes.

[0058] in, Figure 5 The direction of the middle arrow indicates the direction of the light, which is emitted from the light guide layer 220 to the optical decorative layer 230 of this embodiment.

[0059] Based on the aforementioned embodiments, the thickness of the micro / nano structure layer 231 is 3μm to 10μm, the period of the micro / nano structure 2311 is 300nm to 200μm, the depth of the micro / nano structure 2311 is 50nm to 10μm, and the spacing between two adjacent micro / nano structures 2311 is 0 to 198μm. Further, the thickness of the micro / nano structure layer 231 can be, but is not limited to, 3μm, 4μm, 5μm, 6μm, 7μm, 8μm, 9μm, or 10μm; the period of the micro / nano structure 2311 can be, but is not limited to, 300nm, 500nm, 1μm, 10μm, 50μm, 100μm, 150μm, or 200μm; and the depth of the micro / nano structure 2311 can be, but is not limited to, 50nm, 100nm, 500nm, 100nm, 100nm, 150μm, or 200μm. The spacing between two adjacent micro / nano structures 2311 can be, but is not limited to, 0, 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm, 190 μm, or 198 μm.

[0060] Based on the aforementioned embodiments, along the thickness direction of the substrate layer 210, the cross-sectional shape of the micro / nano structure 2311 includes one or more of the following: rectangular, triangular, wavy, semi-circular, and stepped. The cross-sectional shape of the micro / nano structure 2311 of the present invention can be as follows: Figure 6 The micro / nano structure layer 231 can be any shape as shown. It exhibits effects such as patterned laser, platinum, 3D relief, or dynamic light and shadow.

[0061] Based on the aforementioned embodiments, the material of the coating layer 232 includes one or more of silicon dioxide and indium, and the thickness of the coating layer 232 is 80 nm to 260 nm. Further, the thickness of the coating layer 232 can be, but is not limited to, 80 nm, 90 nm, 100 nm, 110 nm, 120 nm, 130 nm, 140 nm, 150 nm, 160 nm, 170 nm, 180 nm, 190 nm, 200 nm, 210 nm, 220 nm, 230 nm, 240 nm, 250 nm, or 260 nm. Further, the thickness of the coating layer 232 is preferably 140 nm.

[0062] Figure 7 This is a diagram showing the effect of the light guide decorative film 200 in this embodiment when it is not guiding light. At this time, the light guide decorative film 200 presents the effect of the optical decorative layer 230, which is a brushed platinum effect. Figure 8 This is a diagram showing the effect of the light guiding decorative film 200 in this embodiment. At this time, the light guiding decorative film 200 presents the effect of the light guiding layer 220, and also has the effect of the optical decorative layer 230. Specifically, it presents a patterned light guiding effect of dotted ribbons, stars, and grids, and also has the brushed platinum effect of the optical decorative layer 230.

[0063] Please see Figure 9 The light-guiding decorative film 300 of the third embodiment of the present invention includes a substrate layer 310, a light-guiding layer 320 and an optical decorative layer 330 located on both sides of the substrate layer 310, and a hardening layer 340. The hardening layer 340 is located on the side of the optical decorative layer 330 away from the substrate layer 310.

[0064] In the light-guiding decorative film 300 of this embodiment, the light-guiding layer 320 includes a micro / nano light-guiding layer 321, a barrier layer 322, and a low-refractive-index material layer 323. The surface of the micro / nano light-guiding layer 321 away from the substrate layer 310 is provided with a plurality of light-guiding microstructures 3211, which can be arranged in a patterned manner. The barrier layer 322 is disposed on the side of the micro / nano light-guiding layer 321 away from the substrate layer 310. The low-refractive-index material layer 323 is located on the side of the barrier layer 322 away from the substrate layer 310. The refractive index of the low-refractive-index material layer 323 is lower than that of the micro / nano light-guiding layer 321, serving to reduce light emission and protect the barrier layer 322.

[0065] In the light-guiding decorative film 300 of this embodiment, the optical decorative layer 330 includes a micro / nano structure layer 331, a coating layer 332, and a decorative coating layer 333. The micro / nano structure layer 331 includes a plurality of micro / nano structures 3311 capable of achieving a textured effect. The coating layer 332 is disposed in a contoured manner on the side of the micro / nano structure layer 331 away from the substrate layer 310. The decorative coating layer 333 is located on the coating layer 332 away from the substrate layer 310.

[0066] Furthermore, the thickness of the decorative coating 333 is 3μm to 4μm; the decorative coating is a decorative wood grain coating, a technological textured graphic coating, or a semi-transparent colored paint coating. Furthermore, the thickness of the decorative coating 333 may be, but is not limited to, 3μm or 4μm.

[0067] in, Figure 9 The direction of the middle arrow indicates the direction of the light, which emerges from the light guide layer 320 and reaches the optical decorative layer 330.

[0068] In this embodiment, the light-guiding decorative film 300, when not guiding light, exhibits the effect of an optical decorative layer 330. For example, the micro / nano structure layer 331 creates a three-dimensional embossed effect; the decorative coating 333, being a semi-transparent red paint coating, also presents a semi-transparent red three-dimensional embossed effect when not guiding light. When guiding light, the light-guiding decorative film 300 exhibits the effect of a light-guiding layer 320. When the light-guiding microstructures are arranged according to a pattern, it can also display a patterned light-guiding effect, while simultaneously possessing the effect of the optical decorative layer 330, such as displaying a "speckled" light-guiding effect while also exhibiting a semi-transparent red three-dimensional embossed effect. Because it can combine the functions of light-guiding patterns and decorative properties, it has broad application prospects in fields such as optoelectronic materials, optical engineering, and thin-film technology.

[0069] When using the light guide decorative film of the present invention, it can be combined with the material surface to be installed on the light guide layer through various composite processes, not limited to OCA adhesive, textured adhesive or IML process.

[0070] Compared with existing technologies, the beneficial effects of this technical solution are as follows: Integrating two effects on a single-layer film, the ultrathin light-guiding decorative film of this invention can provide more advanced film manufacturing processes and technologies in the field of thin film technology. For example, the multilayer nanostructure manufacturing process of the ultrathin light-guiding film can improve the manufacturing precision and performance of the film, reduce costs, and increase production efficiency. Simultaneously, the ultrathin light-guiding decorative film of this invention can be combined and matched with other thin film materials to achieve more complex light transmission and control functions, meeting more application needs. In summary, the ultrathin light-guiding decorative film of this invention has broad application prospects in fields such as optoelectronic materials, optical engineering, and thin film technology. It is expected to solve the limitations and problems in existing technologies, combining light-guiding pattern functions with its own decorative properties, thus promoting technological progress and innovation in related fields. Furthermore, the characteristics of the thin film allow the product to bend axially, and the side-incident light method allows the product to be not limited to backlighting modes; therefore, the light-guiding decorative film of this invention can broaden more application scenarios.

[0071] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A light guide decorative film, characterized by, The light guide decorative film includes a substrate layer and a light guide layer and an optical decorative layer located on both sides of the substrate layer; When no light is emitted from the light guide layer to the optical decorative layer, the light guide decorative film displays the effect of the optical decorative layer; when light is emitted from the light guide layer to the optical decorative layer, the light guide decorative film displays the effect of the light guide layer and also has the effect of the optical decorative layer.

2. The light-guiding decorative film according to claim 1, characterized in that, The optical decorative layer includes a micro / nano structure layer and a decorative coating, wherein the decorative coating is located on the side of the micro / nano structure layer away from the substrate layer; the micro / nano structure layer includes a plurality of spaced-apart protrusions, and ink is filled between adjacent protrusions.

3. The light-guiding decorative film according to claim 2, characterized in that, The protrusion structure comprises a cylinder and / or a polygonal prism, the size of the protrusion structure along the direction parallel to the surface of the substrate layer is 5μm to 80μm, and the size of the protrusion structure along the thickness direction of the substrate layer is 2μm to 5μm; The thickness of the micro / nano structure layer is 3 μm to 10 μm, and the thickness of the decorative coating is 3 μm to 4 μm; The decorative coating is a decorative wood grain coating, a technological textured graphic coating, or a semi-transparent colored paint coating.

4. The light-guiding decorative film according to claim 1, characterized in that, The optical decorative layer includes a micro / nano structure layer and a coating layer. The micro / nano structure layer includes several micro / nano structures that can achieve texture effects. The coating layer is disposed in a contoured manner on the side of the micro / nano structure layer away from the substrate layer.

5. The light-guiding decorative film according to claim 4, characterized in that, The thickness of the micro / nano structure layer is 3μm to 10μm, the period of the micro / nano structure is 300nm to 200μm, the depth of the micro / nano structure is 50nm to 10μm, and the spacing between two adjacent micro / nano structures is 0 to 198μm. Along the thickness direction of the substrate layer, the cross-sectional shape of the micro / nano structure includes one or more of the following: rectangular, triangular, wavy, semi-circular, and stepped.

6. The light-guiding decorative film according to claim 4, characterized in that, The material of the coating layer includes one or more of silicon dioxide and indium, and the thickness of the coating layer is 80nm to 260nm.

7. The light-guiding decorative film according to claim 4, characterized in that, The optical decorative layer further includes a decorative coating layer, which is located in the coating layer away from the substrate layer; The thickness of the decorative coating is 3μm to 4μm; The decorative coating is a decorative wood grain coating, a technological textured graphic coating, or a semi-transparent colored paint coating.

8. The light-guiding decorative film according to claim 1, characterized in that, The light guide layer includes a micro-nano light guide layer and a barrier layer. The surface of the micro-nano light guide layer away from the substrate layer is provided with a plurality of light guide microstructures. The barrier layer is located on the side of the micro-nano light guide layer away from the substrate layer. The barrier layer is made of one or more of silver paste and titanium dioxide; The thickness of the barrier layer is 20% to 50% of the depth of the light-guiding microstructure; The thickness of the barrier layer is 4μm to 5μm; The thickness of the micro / nano light guide layer is 3μm to 10μm.

9. The light-guiding decorative film according to claim 8, characterized in that, The light guide layer further includes a low-refractive-index material layer, which is located on the side of the barrier layer away from the substrate layer, and the refractive index of the low-refractive-index material layer is less than that of the micro / nano light guide layer.

10. The light-guiding decorative film according to claim 1, characterized in that, The light-guiding decorative film further includes a hardening layer, which is located on the side of the optical decorative layer away from the substrate layer; The thickness of the hardened layer is 3μm to 4μm.

Images