Double-sided projection screen and manufacturing method thereof

Abstract

The invention discloses a double-sided projection screen, and belongs to the field of projection display, the double-sided projection screen comprises a first microstructure layer and a second microstructure layer, the side, away from the second microstructure layer, of the first microstructure layer is a first non-smooth surface, and the side, away from the first microstructure layer, of the second microstructure layer is a second non-smooth surface. The first non-smooth surface and the second non-smooth surface are different in structure; the reflection capacity of the first microstructure layer is higher than that of the second microstructure layer, and the transmission capacity of the first microstructure layer is lower than that of the second microstructure layer; the first microstructure layer is formed by surface glue and a refraction material, and the reflectivity of the first microstructure layer to light is greater than or equal to 40%; the second microstructure layer is formed by surface glue and diffusion particles, and the light transmittance of the second microstructure layer is larger than or equal to 40%; the invention further discloses a corresponding manufacturing method. The double-sided projection screen prepared by the invention can be rolled up, and has the advantages of aging resistance, strong ultraviolet resistance and good stability.

Description

[0001] The present application relates to the field of projection display, in particular to a double-sided projection screen and a manufacturing method thereof. BACKGROUND

[0002] In daily use, the existing double-sided projection screen is not easy to roll up, and it is difficult to roll up. Even if forced to roll up, the flatness of the screen after unrolling is poor, which seriously affects the imaging display effect. In addition, the material of the existing double-sided projection screen is prone to aging. Usually after 3-5 years, the edges of the screen will be obviously yellow due to material oxidation and additive volatilization, resulting in color distortion and decline of picture uniformity. After 5-8 years of continuous use, the surface coating will be pulverized under the long-term action of ultraviolet light and heat, causing image blurring and sharpness decline. This physical damage is irreversible and the screen can only be replaced.

[0003] The above problems not only greatly reduce the visual quality and applicability of the image of the double-sided projection screen, but also significantly increase the long-term maintenance cost and equipment update frequency of the user.

[0004] In view of this situation, the industry urgently needs to develop a double-sided projection screen that can be rolled up, so as to be more resistant to aging and ultraviolet light, improve reliability and use economy. SUMMARY

[0005] The present application discloses a double-sided projection screen that can be rolled up, has strong anti-aging and ultraviolet light resistance, good stability, and effectively improves the reliability and use economy of the double-sided projection screen.

[0006] The technical scheme provided by the present application is as follows:

[0007] A double-sided projection screen includes a first microstructure layer and a second microstructure layer. The side of the first microstructure layer away from the second microstructure layer is a first non-smooth surface, and the side of the second microstructure layer away from the first microstructure layer is a second non-smooth surface. The structures of the first non-smooth surface and the second non-smooth surface are different. The reflection ability of the first microstructure layer is stronger than that of the second microstructure layer, and the transmission ability of the first microstructure layer is lower than that of the second microstructure layer. The first microstructure layer is formed of a surface adhesive and a refractive material, and the reflectivity of the first microstructure layer to light is greater than or equal to 40%. The second microstructure layer is formed of a surface adhesive and diffusion particles, and the transmittance of the second microstructure layer to light is greater than or equal to 40%.

[0008] In the application, the first non-smooth surface and the second non-smooth surface of the outer side of the first microstructure layer and the second microstructure layer are different in structure, the material composition, the reflection ability and the transmission ability of the first microstructure layer and the second microstructure layer are different, the reflectivity of the first microstructure layer to light is greater than or equal to 40%, the transmittance of the second microstructure layer to light is greater than or equal to 40%, the double-sided projection screen can be rolled up while ensuring the double-sided imaging function of the double-sided projection screen, the double-sided projection screen has strong anti-aging and ultraviolet resistance ability and good stability, and the reliability and use economy of the double-sided projection screen are improved.

[0009] As an optional mode, the thickness of the first microstructure layer is 10 microns to 500 microns, and / or the thickness of the second microstructure layer is 10 microns to 500 microns.

[0010] In the application, the thickness of the first microstructure layer and / or the second microstructure layer is limited, so that the reflection ability / transmission ability of the first microstructure layer and / or the second microstructure layer is not affected by the thickness of the first microstructure layer and / or the second microstructure layer being too thick, and the first microstructure layer and / or the second microstructure layer is not damaged in the process of being combined with other structures and / or demolding due to the thickness of the first microstructure layer and / or the second microstructure layer being too thin.

[0011] As an optional mode, the refractive material is at least one of titanium dioxide, zirconium oxide, barium sulfate and zinc oxide.

[0012] In the application, the refractive material is further limited to ensure the reflection ability and the transmission ability of the first microstructure layer, and to further ensure the control of the reflectivity of the first microstructure layer to light.

[0013] As an optional mode, the weight proportion of the refractive material in the first microstructure layer is not more than 20%.

[0014] In the application, the mass proportion of the refractive material in the first microstructure layer is set to ensure the control of the reflection ability and the transmission ability of the first microstructure layer, and to further ensure the control of the reflectivity of the first microstructure layer to light.

[0015] As an optional mode, the face adhesive includes an organic silicon polymer, and the weight proportion of the organic silicon polymer in the face adhesive is not less than 70%.

[0016] As an optional mode, the face adhesive further includes a face adhesive filler, and the weight proportion of the face adhesive filler in the face adhesive is not more than 30%.

[0017] In the application, the surface adhesive includes a silicone polymer and a surface adhesive filler, ensuring that the adhesion of the formed first microstructure layer is slightly easy to demold and peel off; the first microstructure layer formed by these materials is relatively stable, has strong anti-aging and ultraviolet resistance, and is beneficial to improve the reliability and use economy of the entire double-sided projection screen. In addition, the weight ratio range of the silicone polymer and the surface adhesive filler is limited, so that the stability of the first microstructure layer is effectively controlled; through the control of the silicone polymer material, the rollability of the first microstructure layer is enhanced, and the rollability of the double-sided projection screen is further improved; in addition, the silicone polymer has the effect of fire retardation and fire prevention, which can further improve the safety performance of the double-sided projection screen.

[0018] As an optional mode, the diffusion particles include organic particles and / or inorganic particles.

[0019] In the application, the diffusion particles include organic particles and / or inorganic particles, so that the transmission ability of the second microstructure layer to light can be further controlled, and the transmittance of the second microstructure layer to light is controlled within the required range.

[0020] As an optional mode, the weight ratio of the diffusion particles in the second microstructure layer is not more than 30%.

[0021] In the application, the mass ratio of the diffusion particles in the second microstructure layer is limited, which ensures the control of the transmission ability of the second microstructure layer, and further guarantees the control of the transmittance of the second microstructure layer to light.

[0022] As an optional mode, a first adhesive layer, a support layer and a second adhesive layer are sequentially arranged between the first microstructure layer and the second microstructure layer.

[0023] In the application, the first adhesive layer, the support layer and the second adhesive layer are sequentially arranged between the first microstructure layer and the second microstructure layer, which enhances the support force of the double-sided projection screen after being rolled and expanded, reduces the possibility of leaving marks, and guarantees the flatness of the double-sided projection screen after being rolled and expanded.

[0024] The application also provides a manufacturing method of the above-mentioned double-sided projection screen, and the entire manufacturing process is relatively simple.

[0025] The manufacturing method of the double-sided projection screen disclosed in the application includes the following steps:

[0026] The first optical microstructure and the second optical microstructure are designed through optical simulation and emulation, the first mold with the first optical microstructure and the second mold with the second optical microstructure are manufactured, the surface of the first mold has a first non-smooth surface, the surface of the second mold has a second non-smooth surface, and the structures of the first non-smooth surface and the second non-smooth surface are different;

[0027] Based on the first mold, a first intermediate surface film containing the first optical microstructure is made, and a mixture of adhesive and refractive material is applied to the first intermediate surface film, smoothed, and cured to form a first microstructure layer with a light reflectivity greater than or equal to 40%.

[0028] Based on the second mold, a second intermediate surface film containing the second optical microstructure is made. A mixture of adhesive and diffusion particles is applied to the second intermediate surface film, smoothed, and cured to form a second microstructure layer with a light transmittance of greater than or equal to 40%.

[0029] The first microstructure layer and the second microstructure layer are combined to form a double-sided projection screen.

[0030] In this application, by controlling the materials and manufacturing process of the first and second microstructure layers, namely the light reflectivity and light transmittance, the resulting double-sided projection screen is ensured to have double-sided imaging function, while also being rollable, having strong aging resistance and UV resistance, and good stability.

[0031] This application also discloses a method for manufacturing a double-sided projection screen, including the following steps:

[0032] The first optical microstructure and the second optical microstructure are designed by optical simulation, and a first mold with the first optical microstructure and a second mold with the second optical microstructure are manufactured. The surface of the first mold has a first non-smooth surface, and the surface of the second mold has a second non-smooth surface. The first non-smooth surface and the second non-smooth surface have different structures.

[0033] Based on the first mold, a first intermediate surface film containing the first optical microstructure is fabricated. A mixture of adhesive and refractive material is applied to the first intermediate surface film, smoothed, and cured to form a first microstructure layer with a light reflectivity greater than or equal to 40%. An adhesive is applied to the first microstructure layer to form a first adhesive layer.

[0034] Based on the second mold, a second intermediate surface film containing the second optical microstructure is fabricated. A mixture of adhesive and diffusion particles is applied to the second intermediate surface film, smoothed, and cured to form a second microstructure layer with a light transmittance greater than or equal to 40%. An adhesive is applied to the second microstructure to form a second adhesive layer. A support layer is then composited onto the second adhesive layer.

[0035] The first adhesive layer and the support layer are combined to form the first microstructure layer and the second microstructure layer, thus creating a double-sided projection screen.

[0036] In this application, by sequentially fabricating a first microstructure layer and a first adhesive layer on a first mold, and sequentially fabricating a second microstructure layer, a second adhesive layer, and a support layer on a second mold, and then combining them, the support force of the double-sided projection screen itself is enhanced, the possibility of leaving marks after the double-sided projection screen is rolled up and unfolded is reduced, thereby enhancing the flatness of the double-sided projection screen after it is rolled up and unfolded, and ensuring the effect of image display. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the dual-sided projection screen structure according to an embodiment of this application;

[0038] Figure 2 This is another structural schematic diagram of a dual-sided projection screen according to an embodiment of this application;

[0039] Figure 3 This is a schematic diagram of the first mold according to an embodiment of this application;

[0040] Figure 4 This is a schematic diagram of the second mold according to an embodiment of this application;

[0041] Figure 5 This is a schematic diagram illustrating the fabrication of the first microstructure layer according to an embodiment of this application;

[0042] Figure 6 This is a schematic diagram illustrating the fabrication of the second microstructure layer according to an embodiment of this application;

[0043] Figure 7 This is a schematic diagram illustrating the fabrication of the second adhesive layer according to an embodiment of this application;

[0044] Figure 8 This is a schematic diagram of the fabrication support layer according to an embodiment of this application;

[0045] Figure 9 This is a schematic diagram of the fabrication of the first adhesive layer according to an embodiment of this application;

[0046] Figure 10 This is a schematic diagram of the composite layers in the embodiments of this application;

[0047] Figure 11 This is a schematic diagram of the double-sided projection screen peeling off from the first intermediate surface film according to an embodiment of this application;

[0048] Figure 12 This is a schematic diagram of the double-sided projection screen peeling off from the second intermediate surface film according to an embodiment of this application;

[0049] The meanings of the reference numerals in the figure are as follows:

[0050] 1000 - First microstructure layer; 2000 - First adhesive layer; 3000 - Support layer; 4000 - Second adhesive layer; 5000 - Second microstructure layer; 6000 - First intermediate surface film; 7000 - Second intermediate surface film. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0052] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0053] See Figure 1 The dual-sided projection screen includes a first microstructure layer 1000 and a second microstructure layer 5000. The side of the first microstructure layer 1000 away from the second microstructure layer 5000 is the first non-smooth surface, and the side of the second microstructure layer 5000 away from the first microstructure layer 1000 is the second non-smooth surface. The first non-smooth surface and the second non-smooth surface have different structures.

[0054] In the embodiments of this application, the first microstructure layer 1000 has a stronger reflectivity than the second microstructure layer 5000, and the first microstructure layer 1000 has a lower transmittance than the second microstructure layer 5000; the reflectivity of the first microstructure layer 1000 to light is greater than or equal to 40%, and the transmittance of the second microstructure layer 5000 to light is greater than or equal to 40%. Thus, when projection light shines on the first microstructure layer 1000, the first microstructure layer 1000 reflects most of the light, presenting an image on the first smooth surface side of the first microstructure layer 1000 for the viewer on that side; some light penetrates to the second microstructure layer 5000, and utilizing the transmitted light and the high transmittance of the second microstructure layer 5000, an image is presented on the second microstructure layer 5000 for the viewer on the second smooth surface side of the second microstructure layer 5000.

[0055] In the embodiments of this application, the first microstructure layer 1000 and the second microstructure layer 5000 have different reflective and transmissive capabilities. In addition to the different structures of the first non-smooth surface and the second non-smooth surface, the material composition of the first microstructure layer 1000 and the second microstructure layer 5000 also has certain differences.

[0056] As further explained, the first microstructure layer 1000 is formed of a surface adhesive and a refractive material, and the second microstructure layer 5000 is formed of a surface adhesive and diffused particles. Both the first microstructure layer 1000 and the second microstructure layer 5000 contain surface adhesive, the composition of which can be the same or different. The inclusion of surface adhesive in the first microstructure layer 1000 and the second microstructure layer 5000 facilitates easy demolding and peeling. Furthermore, even after prolonged exposure to high temperatures, the surface adhesive maintains a relatively stable morphology, exhibiting strong rollability, aging resistance, and UV resistance. Consequently, the first microstructure layer 1000 and the second microstructure layer 5000 possess strong rollability, aging resistance, UV resistance, and good stability. Thus, while ensuring the dual-sided imaging function of the double-sided projection screen, rollability, aging resistance, and UV resistance are all guaranteed, resulting in good stability and improved reliability and cost-effectiveness of the double-sided projection screen.

[0057] In the embodiments of this application, the thickness of the first microstructure layer 1000 is 10 micrometers to 500 micrometers. Limiting the thickness of the first microstructure layer 1000 avoids both excessive thickness, which would affect its reflectivity and transmittance, and excessive thinness, which could lead to localized damage during bonding with other structures and / or demolding. This design facilitates control over the reflectivity and transmittance of the first microstructure layer 1000 and ensures its stability, thereby enhancing the stability of the formed double-sided projection screen.

[0058] In the embodiments of this application, the thickness of the second microstructure layer 5000 is 10 micrometers to 500 micrometers. Limiting the thickness of the second microstructure layer 5000 avoids both excessive thickness, which would affect its transmittance, and excessive thinness, which could lead to localized damage during lamination with other structures and / or demolding. This design facilitates control over the transmittance of the second microstructure layer 5000 and ensures its stability.

[0059] As a further explanation, limiting the thickness of the first microstructure layer 1000 and / or the second microstructure layer 5000 can control the rollability of the first microstructure layer 1000 and / or the second microstructure layer 5000, thereby controlling the rollability of the double-sided projection screen.

[0060] In the embodiments of this application, the refractive material may be titanium dioxide, zirconium oxide, barium sulfate, zinc oxide, or a combination of at least two of them. This limitation on the refractive material further ensures the reflectivity and transmittance of the first microstructure layer 1000, thereby guaranteeing the control of the reflectivity of the first microstructure layer 1000 to light.

[0061] In the embodiments of this application, the weight percentage of the refractive material in the first microstructure layer 1000 does not exceed 20%. By setting the weight percentage of the refractive material in the first microstructure layer 1000, the reflectivity and transmittance of the first microstructure layer 1000 are directly controlled, further ensuring the control of the light reflectivity of the first microstructure layer 1000.

[0062] As a further explanation, the higher the refractive index of the refractive material, the less refractive material is needed to achieve the same reflectivity. The particles of the refractive material are as small as possible and uniformly dispersed in the first microstructure layer 1000.

[0063] In the embodiments of this application, the adhesive used in the first microstructure layer 1000 and the second microstructure layer 5000 can be the same or different.

[0064] As a further explanation, the adhesive can be a silicone polymer. The main component of the silicone polymer can be polydimethylsiloxane, such as hydroxyl-terminated polydimethylsiloxane. Due to the specific properties of silicone polymers (such as elasticity, chemical inertness, and resistance to high and low temperatures), the adhesive has excellent flexibility, resilience, and stability over a wide temperature range (-40℃ to 200℃).

[0065] As a further explanation, the adhesive may include a silicone polymer and an adhesive filler, with the silicone polymer as the base and the adhesive filler as an auxiliary material. Additives, such as silicone oil, may also be added appropriately. Here, the adhesive filler can be used to control the diffusion angle of the first microstructure layer 1000. The adhesive filler can be made of alumina, aluminum nitride, boron nitride, beryllium oxide, zinc oxide, silicon carbide, etc. From a cost perspective, alumina or a mixture of alumina and others is preferred to balance cost and performance. There are no strict requirements for the particle size of the adhesive filler; different particle sizes (e.g., large, medium, and small) are blended according to the required diffusion angle of the first microstructure layer 1000.

[0066] As a further supplementary explanation, the silicone polymer in the adhesive layer shall account for no less than 70% by weight. Based on this, adhesive filler may be included, but its weight percentage shall not exceed 30%. By limiting the weight percentage range of the silicone polymer and adhesive filler, the diffusion angle and stability of the formed first microstructure layer 1000 are effectively controlled. Controlling the weight percentage of the silicone polymer in the adhesive layer ensures that the first microstructure layer 1000 possesses a certain degree of flexibility, elastic tension, and ease of winding; it also imparts a certain degree of flame retardancy, enhancing the flame-retardant and fire-resistant performance of the double-sided projection screen and improving its safety performance.

[0067] In the embodiments of this application, the diffused particles can be organic particles, inorganic particles, or a mixture of both. Using organic and / or inorganic particles, the light transmittance of the second microstructure layer 5000 can be further controlled, keeping the light transmittance of the second microstructure layer 5000 within the desired range.

[0068] As a further explanation, the organic particles are made of polymers, such as acrylic resin microparticles or silica gel microparticles, thus maintaining the high permeability and stability of the second microstructure layer 5000. The inorganic particles can be silicon dioxide, barium sulfate, or titanium dioxide, maintaining high heat resistance and chemical resistance.

[0069] In the embodiments of this application, the weight percentage of diffused particles in the second microstructure layer 5000 does not exceed 30%. By limiting the weight percentage of diffused particles in the second microstructure layer 5000, the transmittance of the second microstructure layer 5000 is controlled, further ensuring the control of the transmittance of light by the second microstructure layer 5000.

[0070] Based on the foregoing description, see Figure 2 The double-sided projection screen may also include a first adhesive layer 2000, a support layer 3000, and a second adhesive layer 4000. The first adhesive layer 2000, the support layer 3000, and the second adhesive layer 4000 are sequentially disposed between the first microstructure layer 1000 and the second microstructure layer 5000. The support layer 3000 enhances the support of the double-sided projection screen, reduces the possibility of leaving marks after unrolling, and ensures the flatness of the double-sided projection screen after unrolling.

[0071] In the embodiments of this application, the support layer 3000 mainly serves a supporting function and is made of transparent or white fabric to reduce the impact on the transmission of incident light. The first adhesive layer 2000 mainly serves to composite the first microstructure layer 1000 and the support layer 3000, and the second adhesive layer 4000 mainly serves to composite the second microstructure layer 4000 and the support layer 3000. The composition of the first adhesive layer 2000 and the second adhesive layer 4000 can be the same.

[0072] As a further explanation, the first adhesive layer 2000 and the second adhesive layer 4000 can be formed by an adhesive. The adhesive can be based on a silicone polymer, the main component of which can be a polysiloxane, such as hydroxyl-terminated polydimethylsiloxane or vinyl polydimethylsiloxane. Based on the inherent properties of silicone polymers (such as elasticity, chemical inertness, and resistance to high and low temperatures), the first adhesive layer 2000 and the second adhesive layer 4000 also possess excellent flexibility, resilience, and stability over a wide temperature range (-40℃ to 200℃).

[0073] As a further supplement, silica can also be added to the first adhesive layer 2000 / second adhesive layer 4000 to improve the transmittance of the first adhesive layer 2000 / second adhesive layer 4000, enhance wear resistance, improve stability, and ensure the quality stability of the double-sided projection screen.

[0074] Before forming the first adhesive layer 2000 / second adhesive layer 4000, the silica and adhesive should be mixed evenly as much as possible before molding. This ensures that the silica is evenly distributed, which is beneficial for the uniform transmission of light from the first adhesive layer 2000 / second adhesive layer 4000, thereby ensuring the uniformity of the image display.

[0075] In the embodiments of this application, the thickness of the double-sided projection screen can be set to between 100 micrometers and 1000 micrometers. When the thickness of the double-sided projection screen is less than 100 micrometers, it is too flexible and difficult to flatten after being rolled up; when the thickness of the double-sided projection screen is greater than 1000 micrometers, rolling it up becomes quite difficult. Setting the thickness of the double-sided projection screen to between 100 micrometers and 1000 micrometers allows for the utilization of the elasticity of each layer structure to achieve the rollability of the double-sided projection screen; it also makes it relatively easy to flatten after being rolled up.

[0076] In the embodiments of this application, the first microstructure layer 1000, the first adhesive layer 2000, the support layer 3000, the second adhesive layer 4000, and the second microstructure layer 5000 can be formed as a single layer structure or as a multilayer composite structure.

[0077] The previous section described a double-sided projection screen; the following section details the corresponding manufacturing method. (See attached image for more information.) Figures 3-12 .

[0078] Figure 1 The manufacturing process of the double-sided projection screen is as follows:

[0079] First, an optical microstructure and a second optical microstructure are designed through optical simulation. A first mold with the first optical microstructure and a second mold with the second optical microstructure are manufactured. The surface of the first mold has a first non-smooth surface and the surface of the second mold has a second non-smooth surface. The structures of the first non-smooth surface and the second non-smooth surface are different.

[0080] Subsequently, a first intermediate surface film 6000 containing a first optical microstructure is fabricated based on the first mold. A mixture of adhesive and refractive material is applied to the surface of the first intermediate surface film 6000, smoothed, and cured to form a first microstructure layer 1000 with a light reflectivity greater than or equal to 40%.

[0081] Based on the second mold, a second intermediate surface film 7000 containing a second optical microstructure is made. A mixture of adhesive and diffusion particles is applied to the second intermediate surface film 7000, smoothed, and cured to form a second microstructure layer 5000 with a light transmittance greater than or equal to 40%.

[0082] Finally, the first microstructure layer 1000 and the second microstructure layer 5000 are combined and then demolded from the first intermediate surface film 6000 and the second intermediate surface film 7000 to form a double-sided projection screen.

[0083] In the embodiments of this application, to facilitate subsequent continuous production and processing, the first mold and the second mold can be cylindrical roller molds. Based on the desired optical effect, the surface shapes of the first mold and the second mold are simulated and designed. Corresponding first and second optical microstructures are then engraved on the first and second molds, forming a first non-smooth surface and a second non-smooth surface. This facilitates control over the structure of the subsequently fabricated first microstructure layer 1000 and second microstructure layer 5000, as well as their reflection and transmission angles.

[0084] In the embodiments of this application, the light reflectivity and light transmittance are controlled by the materials and manufacturing process of the first microstructure layer 1000 and the second microstructure layer 5000, ensuring that the manufactured double-sided projection screen has a double-sided imaging display function, can be rolled up, has strong aging resistance and UV resistance, and has good stability.

[0085] In the embodiments of this application, a double-sided projection screen is formed by fabricating and stacking the first microstructure layer 1000 and the second microstructure layer 5000. The entire fabrication process is relatively simple and easy to control.

[0086] In the embodiments of this application, during the fabrication of the first microstructure layer 1000, the curing temperature can be controlled between 60°C and 160°C. This avoids the curing temperature being too low, which would result in an excessively long curing time; and also avoids the curing temperature being too high, which would affect the structure of the first microstructure layer 1000. Similarly, during the fabrication of the second microstructure layer 5000, the curing temperature can also be controlled between 60°C and 160°C for the same reasons, which will not be repeated here.

[0087] As a further explanation, by controlling the curing temperature, the curing time can be controlled, thus limiting the time required to fabricate the first microstructure layer 1000 and the second microstructure layer 5000 to a certain range, thereby controlling the overall production process time. To better control the time, given that the thicknesses of the first microstructure layer 1000 and the second microstructure layer 5000 are determined, the following rule can be adopted: for every 10°C decrease in curing temperature, the curing time doubles.

[0088] In the embodiments of this application, the order in which the composite first microstructure layer 1000 and the second microstructure layer 5000 are demolded and peeled off from the first intermediate surface film 6000 and the second intermediate surface film 7000 is arbitrary. That is, it can be that the composite is first peeled off from the first intermediate surface film 6000, at which point the first microstructure layer 1000 and the second microstructure layer 5000 are attached to the second intermediate surface film 7000, and then peeled off from the second intermediate surface film 7000 to form a double-sided projection screen; or it can be that the composite is first peeled off from the second intermediate surface film 7000, at which point the first microstructure layer 1000 and the second microstructure layer 5000 are attached to the first intermediate surface film 6000, and then peeled off from the first intermediate surface film 6000 to form a double-sided projection screen.

[0089] In the embodiments of this application, the first microstructure layer 1000 can be a single-layer structure or a multi-layer structure; similarly, the second microstructure layer 5000 can also be a single-layer structure.

[0090] Figure 2 The manufacturing process of the double-sided projection screen is as follows:

[0091] First, an optical microstructure and a second optical microstructure are designed through optical simulation. A first mold with the first optical microstructure and a second mold with the second optical microstructure are manufactured. The surface of the first mold has a first non-smooth surface and the surface of the second mold has a second non-smooth surface. The structures of the first non-smooth surface and the second non-smooth surface are different.

[0092] Secondly, based on the first mold, a first intermediate surface film 6000 containing a first optical microstructure is made. A mixture of adhesive and refractive material is applied to the surface of the first intermediate surface film 6000, smoothed, and cured to form a first microstructure layer 1000 with a light reflectivity greater than or equal to 40%. After that, adhesive is applied to the first microstructure layer 1000 to form a first adhesive layer 2000.

[0093] Simultaneously with or in any order of the aforementioned steps, the following operations are performed: A second intermediate surface film 7000 containing a second optical microstructure is fabricated based on the second mold; a mixture of adhesive and diffusing particles is applied to the surface of the second intermediate surface film 7000, smoothed, and cured to form a second microstructure layer 5000 with a light transmittance greater than or equal to 40%; adhesive is applied to the second microstructure 5000 to form a second adhesive layer 4000; and a support layer 3000 is composited onto the second adhesive layer 4000.

[0094] Finally, by combining the first adhesive layer 2000 and the support layer 3000, the first microstructure layer 1000 and the second microstructure layer 5000 are combined to form a double-sided projection screen.

[0095] In the embodiments of this application, by limiting the materials of the first adhesive layer 2000 and the second adhesive layer 4000, the first adhesive layer 2000 and the second adhesive layer 4000 are made to have a certain elasticity, which is beneficial to maintaining the elasticity of the double-sided projection screen and maintaining its rollability.

[0096] In the embodiments of this application, the thickness of the first adhesive layer 2000 and / or the second adhesive layer 4000 is limited to 50 micrometers to 100 micrometers to avoid insufficient adhesive force provided to the support layer 3000, effectively control the adhesive force of the first adhesive layer 2000 and / or the second adhesive layer, ensure the bonding stability between the support layer 3000 and the first adhesive layer 2000 and the second adhesive layer 4000, thereby enhancing the stability of the double-sided projection screen; and avoid the first adhesive layer 2000 and the second adhesive layer 4000 being too thick, resulting in excessive adhesive force and material waste.

[0097] As a further explanation, color / pigment can be added to the first adhesive layer 2000 and / or the second adhesive layer 4000 to improve transmission uniformity and thus enhance the imaging display effect of the dual-sided projection screen.

[0098] In the embodiments of this application, the support layer 3000 provides a certain supporting force for the first microstructure layer 1000 and the second microstructure layer 5000, limiting the elasticity of the first microstructure layer 1000 and the second microstructure layer 5000 within a certain range. This prevents severe local deformation of the double-sided projection screen during the rolling and unfolding process, thereby enhancing the stability of the double-sided projection screen. With the simultaneous arrangement of the support layer 3000, the first adhesive layer 2000, and the second adhesive layer 4000, the wrinkle resistance, stiffness, and surface flatness of the double-sided projection screen can also be enhanced.

[0099] In the embodiments of this application, the material of the support layer 3000 can be natural fiber, chemical fiber, or blended fiber. To maintain stable performance, high cost-effectiveness, and translucency, transparent chemical fiber is selected as the material of the support layer 3000.

[0100] In the embodiments of this application, the thickness of the support layer 3000 can be 30 micrometers to 1000 micrometers. By controlling the thickness of the first adhesive layer 2000, the second adhesive layer 4000, and the support layer 3000, the thickness of the double-sided projection screen can be controlled to a certain extent, avoiding the problem of the double-sided projection screen being too thick, heavy, and having high installation and transportation costs.

[0101] As a further option, the thickness of the support layer 3000 can be controlled between 30 micrometers and 800 micrometers. Even better, the thickness of the support layer 3000 can be controlled between 100 micrometers and 400 micrometers, which makes it easier to control the thickness of the entire double-sided projection screen.

[0102] In the embodiments of this application, the curing temperature of each process can be controlled between 60°C and 160°C. This unified control of curing temperature and curing time, in turn, controls the time of the entire manufacturing process, ensuring the orderly and stable progress of the entire process.

[0103] In the embodiments of this application, a double-sided projection screen is formed by combining a first microstructure layer 1000, a first adhesive layer 2000, a support layer 3000, a second adhesive layer 4000, and a second microstructure layer 5000. This screen needs to be peeled off from the first intermediate surface film 6000 and the second intermediate surface film 7000. The entire demolding and peeling sequence is arbitrary. That is, it can be peeled off from the first intermediate surface film 6000 first, in which case the double-sided projection screen is attached to the second intermediate surface film 7000, and then peeled off from the second intermediate surface film 7000 to form the product; or it can be peeled off from the second intermediate surface film 7000 first, in which case the double-sided projection screen is attached to the first intermediate surface film 6000, and then peeled off from the first intermediate surface film 6000 to form the product.

[0104] The above method for manufacturing double-sided projection screens has a relatively simple process, strong aging resistance and UV resistance, and good stability, effectively improving the reliability and economic efficiency of double-sided projection screens.

[0105] Those skilled in the art will recognize that the embodiments described herein are intended to help the reader understand the principles of the invention, and should be understood that the scope of protection of the invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on the technical teachings disclosed in this invention without departing from the spirit of the invention, and these modifications and combinations are still within the scope of protection of this invention.

Claims

1. A dual-sided projection screen, characterized by, The first microstructure layer and the second microstructure layer are included, the first non-smooth surface of the first microstructure layer is away from the second microstructure layer, the second non-smooth surface of the second microstructure layer is away from the first microstructure layer, and the first non-smooth surface and the second non-smooth surface are different in structure; the reflection ability of the first microstructure layer is stronger than that of the second microstructure layer, and the transmission ability of the first microstructure layer is lower than that of the second microstructure layer; the first microstructure layer is formed by surface glue and refractive material, the reflectivity of the first microstructure layer to light is greater than or equal to 40%, the second microstructure layer is formed by surface glue and diffusion particles, and the transmittance of the second microstructure layer to light is greater than or equal to 40%.

2. The dual-sided projection screen of claim 1, wherein, The thickness of the first microstructure layer is 10 microns to 500 microns, and / or the thickness of the second microstructure layer is 10 microns to 500 microns.

3. The dual-sided projection screen of claim 1, wherein, The refractive material is at least one of titanium dioxide, zirconium oxide, barium sulfate, and zinc oxide.

4. The dual-sided projection screen of claim 3, wherein, The weight proportion of the refractive material in the first microstructure layer is not more than 20%.

5. The dual-sided projection screen of claim 4, wherein, The surface glue includes an organic silicon polymer, and the weight proportion of the organic silicon polymer in the surface glue is not less than 70%.

6. The dual-sided projection screen of claim 5, wherein, The surface glue further includes a surface glue filler, and the weight proportion of the surface glue filler in the surface glue is not more than 30%.

7. The dual-sided projection screen of claim 1, wherein, The weight proportion of the diffusion particles in the second microstructure layer is not more than 30%.

8. The dual-sided projection screen of claim 1, wherein, A first adhesive layer, a support layer, and a second adhesive layer are sequentially arranged between the first microstructure layer and the second microstructure layer.

9. A method of making a dual-sided projection screen, the method comprising: The steps include: First optical microstructure and second optical microstructure are designed through optical simulation, a first mold with the first optical microstructure and a second mold with the second optical microstructure are manufactured, the first mold has a first non-smooth surface, the second mold has a second non-smooth surface, and the first non-smooth surface and the second non-smooth surface are different in structure; A first intermediate surface film containing the first optical microstructure is made based on the first mold, a mixed material formed by surface glue and refractive material is applied on the first intermediate surface film, is flattened, is solidified, and forms a first microstructure layer with a reflectivity to light greater than or equal to 40%; A second intermediate surface film containing the second optical microstructure is made based on the second mold, a mixed material formed by surface glue and diffusion particles is applied on the second intermediate surface film, is flattened, is solidified, and forms a second microstructure layer with a transmittance to light greater than or equal to 40%; The first microstructure layer and the second microstructure layer are combined to form a double-sided projection screen.

10. A method of making a dual-sided projection screen, the method comprising: The steps include: First optical microstructure and second optical microstructure are designed through optical simulation, a first mold with the first optical microstructure and a second mold with the second optical microstructure are manufactured, the first mold has a first non-smooth surface, the second mold has a second non-smooth surface, and the first non-smooth surface and the second non-smooth surface are different in structure; The first intermediate surface film containing the first optical microstructure is made based on the first mold, a mixed material formed by a surface adhesive and a refractive material is applied on the first intermediate surface film, is leveled, is solidified, and a first microstructure layer with a light reflectivity greater than or equal to 40% is formed; An adhesive is applied on the first microstructure layer to form a first adhesive layer; The second intermediate surface film containing the second optical microstructure is made based on the second mold, a mixed material formed by a surface adhesive and diffusion particles is applied on the second intermediate surface film, is leveled, is solidified, and a second microstructure layer with a light transmittance greater than or equal to 40% is formed; An adhesive is applied on the second microstructure to form a second adhesive layer; A support layer is compounded on the second adhesive layer; The first microstructure layer and the second microstructure layer are compounded by compounding the first adhesive layer and the support layer, and a double-sided projection screen is formed.

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