Projection screen, projection screen manufacturing method and projection device

Abstract

The invention discloses a projection screen, a manufacturing method of the projection screen and a projection device, relates to the technical field of projection display, and is used for solving the problem that a reflecting layer of an existing projection screen is easy to fall off. The projection screen comprises a functional layer and a reflecting layer. The reflective layer is stacked on the surface of one side of the functional layer. The reflecting layer comprises a base material, a reflecting material and an adhesion promoter. The reflective material is mixed with the base material and is used for reflecting light. The adhesion promoter is mixed with the base material, and the adhesion promoter is at least fused or chemically bonded with the material of the functional layer so as to improve the adhesion of the reflecting layer. The projection screen is used for displaying a projection picture.

Description

Technical Field

[0001] The present application relates to the technical field of projection display, and in particular, to a projection screen, a manufacturing method of the projection screen, and a projection device. Background Art

[0002] In the technical field of projection display, a projector is generally used in combination with a projection screen. The light emitted by the projector is projected onto the projection screen, and after being reflected by the projection screen, it reaches the eyes of the audience, and the audience can view the image formed by the light on the surface of the projection screen.

[0003] In order to reflect the light emitted by the projector, the projection screen usually has a reflective layer, and the reflective layer can reflect the light emitted by the projector, so that the light emitted by the projector can reach the eyes of the audience.

[0004] In the existing projection screen, the reflective layer is usually directly exposed to the use environment, and the reflective layer of the projection screen is easily scratched. After the reflective layer of the projection screen is scratched, it is easy to fall off, thereby affecting the display effect of the projection screen. Summary of the Invention

[0005] The present application provides a projection screen, a manufacturing method of the projection screen, and a projection device, which are used to solve the problem that the reflective layer of the existing projection screen is easily peeled off.

[0006] To achieve the above object, the present application adopts the following technical solutions:

[0007] On the one hand, an embodiment of the present application provides a projection screen, including a functional layer and a reflective layer. The reflective layer is stacked on the surface of one side of the functional layer. The reflective layer includes a matrix material, a reflective material, and an adhesion promoter. The reflective material is mixed in the matrix material for reflecting light. The adhesion promoter is mixed in the matrix material, and the adhesion promoter is at least mutually fused or chemically bonded with the material of the functional layer to enhance the adhesion of the reflective layer.

[0008] In the projection screen provided by the embodiment of the present application, since the reflective layer includes a reflective material, the reflective layer can reflect light. Since the reflective layer includes an adhesion promoter, and the adhesion promoter is at least mutually fused or chemically bonded with the material of the functional layer, the adhesion between the reflective layer and the functional layer can be improved. As the adhesion of the reflective layer increases, the reflective layer can be firmly attached to the functional layer. When the reflective layer is scratched, the reflective layer is not easily peeled off. In this way, the effect of the projection screen reflecting light can be ensured.

[0009] In some embodiments, the adhesion promoter includes at least one of hydroxybenzylamine and vinyl chloride-vinyl isobutyl ether copolymer.

[0010] In some embodiments, the adhesion promoter includes at least one of 3-chloropropyltrimethoxysilane and vinyltriethoxysilane.

[0011] In some embodiments, the reflective layer further includes an adjusting aid. The adjusting aid includes at least one of an antifoaming agent, a wetting agent, an antistatic agent, and a leveling agent.

[0012] In some embodiments, the substrate material includes a resin substrate material, a solvent, and a curing agent. The weight parts of the reflective material are 5 to 15 parts, the weight parts of the resin substrate material are 20 to 50 parts, the weight parts of the solvent are 30 to 50 parts, the weight parts of the curing agent are 1 to 10 parts, the weight parts of the adjusting aid are 1 to 10 parts, and the weight parts of the adhesion promoter are 1 to 5 parts.

[0013] In some embodiments, the weight parts of the reflective material are 10 parts, the weight parts of the resin substrate material are 40 parts, the weight parts of the solvent are 35 parts, the weight parts of the curing agent are 8 parts, the weight parts of the adjusting aid are 5 parts, and the weight parts of the adhesion promoter are 2 parts. Alternatively, the weight parts of the reflective material are 10 parts, the weight parts of the resin substrate material are 40 parts, the weight parts of the solvent are 33 parts, the weight parts of the curing agent are 8 parts, the weight parts of the adjusting aid are 5 parts, and the weight parts of the adhesion promoter are 4 parts.

[0014] In some embodiments, along the lamination direction of the functional layer and the reflective layer, the thickness of the reflective layer is 15um to 50um.

[0015] In some embodiments, the reflective material includes aluminum powder, and the particle size of the aluminum powder is 5um to 50um.

[0016] On the other hand, the embodiments of the present application also provide a method for manufacturing any one of the above projection screens. The method includes manufacturing a functional layer and manufacturing a reflective layer on the surface of one side of the functional layer. Among them, the reflective layer includes a substrate material, a reflective material, and an adhesion promoter. The reflective material is mixed in the substrate material for reflecting light. The adhesion promoter is mixed in the substrate material, and the adhesion promoter at least mutually fuses or chemically bonds with the material of the functional layer to enhance the adhesion of the reflective layer.

[0017] In some embodiments, manufacturing the reflective layer on the surface of one side of the functional layer includes mixing the substrate material, the reflective material, and the adhesion promoter to form a mixed solution, coating the mixed solution on the surface of one side of the functional layer, and drying the mixed solution for 20min to 50min under the condition of 50°C to 60°C to cure the mixed solution to form the reflective layer.

[0018] The technical effects of using the above method for manufacturing a projection screen are the same as those of the above projection screen, and will not be elaborated here.

[0019] On the other hand, an embodiment of the present application further provides a projection device, including a projector and any one of the above projection screens. The projector is configured to emit projection light toward the projection screen, and the projection screen is configured to reflect the projection light projected by the projector. Wherein, along the stacking direction of the functional layer and the reflection layer, the projector is located on the side of the functional layer away from the reflection layer.

[0020] The technical effects produced by the projection device including any one of the above projection screens are the same as those of the above projection screen, and will not be elaborated here. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of a Fresnel lens layer and a reflection layer in a related art;

[0022] Figure 2 It is a schematic diagram of the usage state of the projection device provided by an embodiment of the present application;

[0023] Figure 3 It is a schematic structural diagram of a projection screen provided by an embodiment of the present application;

[0024] Figure 4 It is a schematic structural diagram of another projection screen provided by an embodiment of the present application;

[0025] Figure 5 It is a schematic structural diagram of yet another projection screen provided by an embodiment of the present application;

[0026] Figure 6 It is a schematic structural diagram of a surface layer provided by an embodiment of the present application;

[0027] Figure 7 It is a schematic structural diagram of another surface layer provided by an embodiment of the present application;

[0028] Figure 8 For Figure 7 It is a schematic structural diagram of the microlenses of the surface layer shown in after being atomized;

[0029] Figure 9 It is a schematic structural diagram of a Fresnel lens layer provided by an embodiment of the present application;

[0030] Figure 10 It is a schematic structural diagram of another Fresnel lens layer provided by an embodiment of the present application;

[0031] Figure 11 It is a schematic structural diagram of another projection screen provided by an embodiment of the present application;

[0032] Figure 12 It is a schematic structural diagram of another projection screen provided by an embodiment of the present application;

[0033] Figure 13 Another structural schematic diagram of a projection screen provided by an embodiment of the present application;

[0034] Figure 14 Another structural schematic diagram of a projection screen provided by an embodiment of the present application;

[0035] Figure 15 Another structural schematic diagram of a projection screen provided by an embodiment of the present application;

[0036] Figure 16 It is a broken line graph of the refractive index before and after scratching of the reflective layer with and without an adhesion promoter added;

[0037] Figure 17 A structural schematic diagram of a reflective layer provided by an embodiment of the present application;

[0038] Figure 18 Another structural schematic diagram of a reflective layer provided by an embodiment of the present application;

[0039] Figure 19 A flowchart of the manufacturing method of the projection screen provided by an embodiment of the present application Figure 1 ;

[0040] Figure 20 A flowchart of the manufacturing method of the projection screen provided by an embodiment of the present application Figure 2 。

[0041] Reference numerals:

[0042] 012 - Reflective layer; 013 - Fresnel lens layer; 100 - Projection device; 1 - Projection screen; 11 - Functional layer; 12 - Reflective layer; 13 - Fresnel lens layer; 131 - Fresnel microstructure; 132 - Third diffusion particle; 14 - Diffusion layer; 141 - First diffusion particle; 142 - Translucent protrusion; 15 - Surface layer; 151 - Second diffusion particle; 16 - Coloring layer; 17 - Adhesive layer; 2 - Projector; 21 - Incident light; 22 - Emergent light; 3 - Audience; 50 - Microlens. Detailed implementation manners

[0043] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0044] In the description of this application, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "inner", "outer", "center", etc. is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0045] Hereinafter, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0046] In the description of this application, unless otherwise specified, " / " means "or". For example, A / B may represent A or B. The "and / or" herein is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, "at least one" means one or more, and "a plurality" means two or more.

[0047] In the embodiments of this application, the term "comprise", "include" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or device comprising such element.

[0048] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or having more advantages than other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0049] In the field of projection display technology, especially in the field of ultra-short throw projection display technology, in order to achieve a better projection effect, projectors generally use a projection screen with a Fresnel microstructure. The projection screen with a Fresnel microstructure has the characteristics of high gain, small viewing angle and the ability to resist ambient light.

[0050] In order to reflect the light emitted by the projector into the eyes of the audience, the projection screen usually includes a reflective layer. The reflective layer usually has a reflective material. After the light emitted by the projector irradiates on the reflective layer, the reflective layer can reflect the light emitted by the projector into the eyes of the audience.

[0051] The layer of the projection screen with a Fresnel microstructure is usually called the Fresnel lens layer. The light emitted by the ultra-short throw projector is reflected by the Fresnel lens layer and the reflective layer and then exits from the screen and finally enters the human eye. For the ambient light from the ceiling and around, the Fresnel lens layer and the reflective layer can reflect it to places where it is not viewed by the human eye, thus avoiding the influence of the ambient light on the viewing effect of the human eye.

[0052] The Fresnel microstructure is formed on the side of the Fresnel lens layer away from the viewer, as Figure 1 shown, Figure 1 FIG. 013 is a schematic structural diagram of a Fresnel lens layer 013 and a reflective layer 012 in a related art. The reflective layer 012 is disposed on the surface of the side of the Fresnel lens layer 013 where the microstructure is formed.

[0053] The reflective layer of the existing projection screen is usually directly exposed to the use environment. In this way, during the use of the projection screen, the reflective layer is easily scratched by things in the surrounding environment. After the reflective layer is scratched by things in the surrounding environment, it is easily peeled off from the Fresnel lens layer. The peeling off of the reflective layer will affect the reflection effect of the projection screen and cause the display effect of the projection screen to deteriorate.

[0054] When the reflective layer 012 is disposed on the surface of the side of the Fresnel lens layer 013 with a microstructure, since the cross-section of the surface of the Fresnel lens layer 013 with a Fresnel microstructure is a serrated structure, the film-forming thickness of the reflective layer 012 on the Fresnel lens layer 013 is uneven, and the thickness of part of the reflective layer 012 is relatively thin, and it is more likely to peel off after being scratched.

[0055] In the related art, in order to reduce the scratching and peeling off of the reflective layer, a protective layer is usually provided on the projection screen. The protective layer is located on the side of the reflective layer away from the Fresnel lens layer. The protective layer is usually adhered to the reflective layer to form a protection for the reflective layer. Since the protective layer is adhered to the reflective layer, an adhesive layer will also be formed between the protective layer and the reflective layer.

[0056] However, the protective layer is generally a rigid material. At this time, the whole projection screen cannot be curled, and the projection screen needs to be kept in an unfolded state, and the space occupied by the projection screen is relatively large, which is not convenient for transportation and protection.

[0057] In addition, the existing protective layer can also be a flexible material. When the protective layer is a flexible material, the protective layer and the adhesive layer between the protective layer and the reflective layer will cause an increase in the overall thickness of the projection screen. When the projection screen is curled up, slippage will occur between the layers of the projection screen, resulting in deformation of the projection screen.

[0058] Based on this, an embodiment of the present application provides a projection device, as Figure 2 shown, Figure 2 which is a schematic diagram of the usage state of the projection device 100 provided by an embodiment of the present application. The projection device 100 may include a projection screen 1 and a projector 2. The projector 2 is located on one side of the projection screen 1 and emits light towards the projection screen 1.

[0059] As Figure 2 shown, when the projection device 100 is in use, the projector 2 can be placed in the front lower part of the projection screen 1, and the audience 3 is located in front of the projection screen 1 and looks at the projection screen 1. The incident light 21 emitted by the projector 2 shines on the projection screen 1. After being reflected by the projection screen 1, the incident light 21 finally forms an outgoing light 22 that shines on the audience 3, and at the same time, an image is formed in the projection screen 1.

[0060] Exemplarily, Figure 2 the projector 2 shown may include a laser, and the laser can be one of a single-color laser, a two-color laser, and a three-color laser. Among them, the three-color laser can emit blue laser, red laser, and green laser.

[0061] The range of the wavelength of the blue laser emitted by the laser can be set to 430 nm - 460 nm, the range of the wavelength of the green laser emitted can be set to 500 nm - 540 nm, and the range of the wavelength of the red laser emitted can be set to 610 nm - 650 nm. Of course, the projector 2 can also be a projector 2 that emits ordinary light.

[0062] Next, the projection screen 1 provided by an embodiment of the present application will be introduced. As Figure 3 shown, Figure 3 which is a schematic structural diagram of a projection screen 1 provided by an embodiment of the present application. The projection screen may include a functional layer 11 and a reflective layer 12. The reflective layer 12 can be used to reflect light.

[0063] As Figure 3 shown, along the lamination direction of the functional layer 11 and the reflective layer 12, the projector 2 is located on the side of the functional layer 11 away from the reflective layer 12, and the audience 3 is located on the side of the functional layer 11 close to the projector 2.

[0064] In this way, after the light projected by the projector 2 reaches the reflective layer 12, it will be reflected by the reflective layer 12 to the side where the projector 2 is located and enter the eyes of the viewer 3, and the viewer 3 can then view the image on the projection screen 1.

[0065] In some embodiments, as Figure 3 shown, the functional layer 11 may include a Fresnel lens layer 13. The Fresnel lens layer 13 is stacked on one side of the reflective layer 12. As Figure 3 shown, the surface of the Fresnel lens layer 13 close to the reflective layer 12 has Fresnel microstructures 131. Among them, when the external ambient light passes through the Fresnel microstructures 131, it will be reflected to the area where it is not viewed by the human eye, so that the projection screen 1 has a certain ability to resist ambient light.

[0066] Exemplarily, the Fresnel microstructures 131 may be arc-shaped Fresnel microstructures 131, that is, the Fresnel microstructures 131 may be composed of a plurality of concentric arc-shaped grooves.

[0067] Continuing to refer to Figure 3 , in some embodiments, the functional layer 11 may further include a diffusion layer 14. The diffusion layer 14 is stacked on the side of the Fresnel lens layer 13 away from the reflective layer 12. Among them, first diffusion particles 141 are distributed in the diffusion layer 14. The first diffusion particles 141 are usually made of silicone materials, polymethyl methacrylate (PMMA) materials.

[0068] When the light emitted by the projector 2 passes through the diffusion layer 14, the first diffusion particles 141 in the diffusion layer 14 can diffuse the light emitted by the projector 2, thereby improving the viewing angle of the projection screen 1.

[0069] In order to ensure that the projection screen 1 can be curled, in some embodiments, the diffusion layer 14 may be a polyethylene terephthalate (PET) diffusion layer 14. Since the PET material has flexibility and can be curled, it can ensure that the projection screen 1 can be curled. At the same time, since the PET material has a good light transmittance, it can ensure that the light projected by the projector 2 can pass through smoothly, ensuring the light utilization rate.

[0070] It can be understood that the diffusion layer 14 can also be made of other materials. Exemplarily, the diffusion layer 14 can also be made of thermoplastic polyurethane elastomer rubber (TPU) materials. Or, the diffusion layer 14 can also be made of styrenic block copolymers (SBC) materials.

[0071] The diffusion layer 14 made of the above-mentioned TPU material or SBC material is also flexible, enabling the projection screen 1 to be curled. At the same time, the above-mentioned materials also have good light transmittance, which can also ensure the utilization rate of the light projected by the projector 2.

[0072] In some embodiments, as Figure 3 shown, the functional layer 11 may further include a surface layer 15. The surface layer 15 is stacked on the side of the diffusion layer 14 away from the Fresnel lens layer 13. The surface layer 15 can serve as a protective layer for the projection screen 1 and play a protective role for the projection screen 1.

[0073] In some embodiments, as Figure 4 shown, Figure 4 is a schematic structural diagram of another projection screen 1 provided by an embodiment of the present application. Second diffusion particles 151 may be distributed inside the surface layer 15. When the light projected by the projector 2 passes through the second diffusion particles 151 in the surface layer 15, diffusion will also occur, thereby increasing the viewing angle of the projection screen 1.

[0074] When the light projected by the projector 2 passes through the surface layer 15 and the diffusion layer 14, since the first diffusion particles 141 and the second diffusion particles 151 are respectively distributed inside the surface layer 15 and the diffusion layer 14, the light will be diffused by the first diffusion particles 141 and the second diffusion particles 151. Thus, through the combined action of the surface layer 15 and the diffusion layer 14, the viewing angle of the projection screen 1 can be effectively enlarged, ensuring the viewing angle of the projection screen 1.

[0075] Exemplarily, the surface layer 15 may also be made of PET material to ensure that the surface layer 15 can be curled while maintaining a high light transmittance. Alternatively, the surface layer 15 may also be made of flexible materials such as SBC or TPU.

[0076] In some embodiments, as Figure 4 shown, the surface of the surface layer 15 away from the Fresnel lens layer 13 may be a matte surface, and the light reflectivity of the matte surface is relatively low. Thus, when the light projected by the projector 2 reaches this surface, more light will pass through this surface and enter the projection screen 1, so that the light projected by the projector 2 is not likely to form a clear image in other places (such as the ceiling), ensuring the viewing experience of the audience 3.

[0077] As Figure 4As shown, at least a part of the second diffusion particles 151 inside the surface layer 15 are close to the surface of the surface layer 15 on the side away from the Fresnel lens layer 13. In this way, the second diffusion particles 151 can reduce the flatness of the surface of the surface layer 15 on the side away from the Fresnel lens layer 13, so that the surface of the surface layer 15 on the side away from the Fresnel lens layer 13 forms a fogged surface, and light is not easily reflected on this surface, and the transmittance is relatively high, so that the surface layer 15 has a better effect of resisting ceiling reflection.

[0078] Of course, in some embodiments, as Figure 5 shown, Figure 5 FIG. is a schematic structural diagram of another projection screen 1 provided by an embodiment of the present application. The surface of the surface layer 15 on the side away from the Fresnel lens layer 13 can also be a flat surface.

[0079] It can be understood that the surface of the surface layer 15 on the side away from the Fresnel lens layer 13 can also form a fogged surface by other means. Exemplarily, as Figure 6 shown, Figure 6 FIG. is a schematic structural diagram of a surface layer 15 provided by an embodiment of the present application. The surface of the surface layer 15 on the side away from the Fresnel lens layer 13 ( Figure 5 ) (the left side in Figure 6 ) can be processed by a sandblasting process to form a fogged surface, which is simple, convenient and easy to implement.

[0080] In some embodiments, as Figure 7 shown, Figure 7 FIG. is a schematic structural diagram of another surface layer 15 provided by an embodiment of the present application. The surface of the surface layer 15 on the side away from the Fresnel lens layer 13 ( Figure 3 ) (the left side in Figure 7 ) is distributed with microlenses (Lenti) 50. By arranging the microlenses 50, the viewing angle of the projection screen 1 ( Figure 2 ) can be increased, and at the same time, the reflectivity of the surface of the surface layer 15 can be reduced. Among them, the shape of the microlenses 50 can be hemispherical.

[0081] In some embodiments, as Figure 8 shown, Figure 8 is Figure 7 a schematic structural diagram of the microlenses 50 on the surface layer 15 shown in

[0082] after being fogged. The surface of the microlenses 50 can be a fogged surface. Furthermore, the reflectivity of light on this surface can be further reduced, so that the transmittance of light is higher, and then the utilization efficiency of the light projected by the projector 2 is improved, and the probability of forming a clear image elsewhere due to light reflection is reduced.It can be understood that the Fresnel lens layer 13 of the projection screen 1 provided in the embodiments of the present application may also have different structures. Below, in conjunction with the accompanying drawings, several different structures of the Fresnel lens layer 13 will be described by way of example.

[0083] In order to improve the viewing angle of the projection screen 1, in some embodiments, as Figure 9 shown, Figure 9 FIG. is a schematic structural diagram of a Fresnel lens layer 13 provided in an embodiment of the present application. Third diffusion particles 132 are distributed inside the Fresnel lens layer 13. When the light emitted by the projector 2 passes through the Fresnel lens layer 13, it can be diffused by the third diffusion particles 132, thereby expanding the viewing angle of the projection screen 1.

[0084] In some embodiments, as Figure 10 shown, Figure 10 FIG. is a schematic structural diagram of another Fresnel lens layer 13 provided in an embodiment of the present application. A microlens 50 is provided on the surface of the Fresnel lens layer 13 on the side where the Fresnel microstructure 131 is provided. By providing the microlens 50, the light can be diffused, so that the viewing angle of the projection screen becomes larger. At the same time, the coherence between the diffused light rays is reduced, and thus the severity of the speckles formed on the projection screen can be reduced.

[0085] In order to improve the contrast of the projection screen 1, in some embodiments, as Figure 3 shown, the projection screen 1 may further include a coloring layer 16. The coloring layer 16 is located between the surface layer 15 and the reflection layer 12. A dark dye is added to the coloring layer 16. The dark dye can absorb the external ambient light, thereby increasing the contrast of the projection screen 1. Among them, the dark dye is generally an organic dye, and dyes such as azo dyes and phthalocyanine dyes can be selected.

[0086] It can be understood that the position of the coloring layer 16 can be set according to the actual situation. As Figure 3 shown, the coloring layer 16 can be located on the side of the diffusion layer 14 close to the surface layer 15. At this time, after the projection light enters the interior of the projection screen 1, it first passes through the coloring layer 16 and then through the diffusion layer 14.

[0087] Of course, in some other embodiments, as Figure 11 shown, Figure 11 FIG. is a schematic structural diagram of another projection screen 1 provided in an embodiment of the present application. The coloring layer 16 can also be located on the side of the diffusion layer 14 away from the surface layer 15. At this time, after the projection light enters the interior of the projection screen 1, it first passes through the diffusion layer 14 and then through the coloring layer 16.

[0088] In some embodiments, as Figure 12 shown, Figure 12Another structural schematic diagram of the projection screen 1 provided by the embodiment of the present application. Dark dyes may not be added to each layer structure of the projection screen 1. It can be understood that when the influence of external environmental light on the projection image is small, the influence of ambient light on the projection image can be ignored. At this time, a good projection image can also be obtained without adding dark dyes inside the projection screen 1.

[0089] In some embodiments, as Figure 13 shown, Figure 13 Another structural schematic diagram of the projection screen 1 provided by the embodiment of the present application. The number of diffusion layers 14 can be multiple. In this way, light will pass through the first diffusion particles 141 in multiple diffusion layers 14, thereby further increasing the viewing angle.

[0090] Exemplarily, as Figure 13 shown, the projection screen 1 includes two diffusion layers 14. One of the diffusion layers 14 is located between the coloring layer 16 and the surface layer 15, and the other diffusion layer 14 is located between the coloring layer 16 and the Fresnel lens layer 13. At this time, the above two diffusion layers 14 can serve as the support basis of the projection screen 1.

[0091] Continuing to refer to Figure 13 , the projection screen 1 may further include an adhesive layer 17. The adhesive layer 17 is located between the diffusion layer 14 and the coloring layer 16. The coloring layer 16 and the diffusion layer 14 can be adhered through the adhesive layer 17. Exemplarily, the adhesive layer 17 can be an optically transparent adhesive. Of course, in some other embodiments, the projection screen 1 may not be provided with the adhesive layer 17. As mentioned above, the coloring layer 16 can be directly made with one of the diffusion layers 14 as the base. In this way, there is no need to provide an adhesive layer 17 for adhesion.

[0092] In some embodiments, as Figure 14 shown, Figure 14 Another structural schematic diagram of the projection screen 1 provided by the embodiment of the present application. A light-transmitting protrusion 142 is provided on the surface of the diffusion layer 14 on the side away from the surface layer 15. When light passes through the light-transmitting protrusion 142, the light will be diffused, thereby increasing the viewing angle of the projection screen 1.

[0093] Among them, the light-transmitting protrusion 142 can be a cylindrical lens. As Figure 14 shown, the cross-section of the light-transmitting protrusion 142 along the plane perpendicular to its extending direction can be semi-circular, that is, the light-transmitting protrusion 142 is semi-cylindrical.

[0094] In some embodiments, as Figure 15 shown, Figure 15 Another structural schematic diagram of the projection screen 1 provided by the embodiment of the present application. Figure 15The projection screen 1 shown is provided with two diffusion layers 14, and light-transmitting protrusions 142 are provided on both surfaces of the two diffusion layers 14 that are close to each other.

[0095] Similarly, the shape of the light-transmitting protrusion 142 can also be semi-cylindrical. Exemplarily, the extending directions of the light-transmitting protrusions 142 in the two diffusion layers 14 can be perpendicular to each other.

[0096] The projection screen 1 is generally rectangular. As Figure 15 shown, Figure 15 the up-down direction in Figure 15 shown is the width direction of the projection screen 1, and the width direction is the vertical direction for the viewer 3 to watch. The direction perpendicular to

[0097] the plane shown in

[0098] is the length direction of the projection screen 1, and the length direction is the horizontal direction for the viewer to watch.

[0099] Thus, the light-transmitting protrusions 142 of the left diffusion layer 14 extend along the length direction of the projection screen 1. In this way, when light passes through the light-transmitting protrusions 142, the light will be diffused along the width direction of the projection screen 1, thereby increasing the viewing angle of the projection screen 1 in the vertical direction.

[0100] Correspondingly, the light-transmitting protrusions 142 on the surface of the right diffusion layer 14 extend along the width direction of the projection screen 1. In this way, when light passes through the light-transmitting protrusions 142, it will be diffused along the length direction of the projection screen 1, thereby increasing the viewing angle of the projection screen 1 in the horizontal direction.

[0101] In order to improve the adhesion between the reflective layer 12 and the Fresnel lens layer 13, in some embodiments, the reflective layer 12 may include a matrix material, a reflective material, and an adhesion promoter. The reflective material is mixed in the matrix material and is used to reflect light.

[0102] The adhesion promoter is mixed in the matrix material. The adhesion promoter is at least mutually fused or chemically bonded with the material of the functional layer 11 to enhance the adhesion of the reflective layer 12.

[0101] With the improvement of the adhesion of the reflective layer 12, the reflective layer 12 can be firmly attached to the functional layer 11. When the reflective layer 12 is scratched, the reflective layer 12 is not easily detached. In this way, the effect of the projection screen 1 reflecting light can be ensured.

[0102] It can be understood that the reflective layer 12 provided in the embodiments of the present application can be applied to the above various different types of projection screens 1. Exemplarily, as Figure 3 shown, the reflective layer 12 is provided on the surface of the Fresnel lens layer 13 on the side having the Fresnel microstructures 131, and it can be mutually fused or chemically bonded with the material of the Fresnel lens layer 13.

[0103] As Figure 16 shown,Figure 16 The broken line graph of the refractive index change before and after scratching of the reflective layer 12 with and without the addition of an adhesion promoter Figure 3 ) Figure 16 In the figure, the abscissa represents the position from a certain point, and the ordinate represents the reflectivity.

[0104] Among them, Figure 16 The first solid line from top to bottom in the figure represents the reflectivity of different positions of the reflective layer 12 with the addition of an adhesion promoter Figure 3 ) when not scratched, and the first dotted line represents the reflectivity of different positions of the reflective layer 12 with the addition of an adhesion promoter after scratching.

[0105] Figure 16 The second solid line from top to bottom in the figure represents the reflectivity of different positions of the reflective layer 12 without the addition of an adhesion promoter Figure 3 ) when not scratched, and the second dotted line represents the reflectivity of different positions of the reflective layer 12 without the addition of an adhesion promoter after scratching.

[0106] It can be seen from Figure 16 that the reflective effect of the reflective layer 12 with the addition of an adhesion promoter Figure 3 ) is stronger than that of the reflective layer 12 without the addition of an adhesion promoter. At the same time, the decrease amplitude of the reflectivity of the reflective layer 12 with the addition of an adhesion promoter after scratching is smaller than that of the reflective layer 12 without the addition of an adhesion promoter after scratching.

[0107] In some embodiments, the adhesion promoter may include at least one of hydroxybenzylamine and vinyl chloride-vinyl isobutyl ether copolymer. The above materials are easily fused with other materials, so that the materials between the reflective layer 12 and the functional layer 11 are fused with each other, thereby improving the adhesion between the reflective layer 12 and the functional layer 11.

[0108] It can be understood that for different adhesion promoters, materials that are easily fused with the above adhesion promoter materials can be selected to make the corresponding functional layers. Exemplarily, when the material of the Fresnel lens layer 13 is unsaturated polyester or polyether acrylate, the adhesion promoter can be at least one of vinyl chloride-vinyl isobutyl ether or hydroxybenzylamine. The adhesion promoter can promote the fusion between the reflective layer 12 and the Fresnel lens layer 13, thereby improving the adhesion between the reflective layer 12 and the Fresnel lens layer 13.

[0109] In some other embodiments, the adhesion promoter may include at least one of 3-chloropropyltrimethoxysilane and vinyltriethoxysilane. There are bifunctional groups in the above materials, which are prone to form chemical bonds with other materials. The above materials can bond with the matrix material and the material of the functional layer, thereby improving the adhesion between the matrix material and the functional layer material, and ultimately improving the adhesion between the reflective layer 12 and the functional layer 11.

[0110] Meanwhile, the adhesion promoter has good compatibility with the matrix material. The adhesion promoter can promote the mutual combination of the matrix materials of the reflective layer 12 through effects such as mutual dissolution and entanglement, thereby improving the tightness of the connection between the matrix materials. In this way, both the strength and the density of the reflective layer 12 formed by mixing the matrix material and the reflective material increase, and the reflective layer 12 is not easily detached.

[0111] Exemplarily, when the material of the Fresnel lens layer 13 is unsaturated polyester, polyether acrylate or epoxy acrylate, the adhesion promoter can be at least one of 3-chloropropyltrimethoxysilane and vinyltriethoxysilane.

[0112] Meanwhile, the matrix material may include epoxy resin. 3-chloropropyltrimethoxysilane and vinyltriethoxysilane can improve the strength and density of the epoxy resin film through effects such as mutual dissolution and entanglement.

[0113] 3-chloropropyltrimethoxysilane and vinyltriethoxysilane can form chemical bonds with the matrix material and unsaturated polyester, polyether acrylate or epoxy acrylate, thereby improving the adhesion between the matrix material and unsaturated polyester, polyether acrylate or epoxy acrylate.

[0114] In some embodiments, the reflective layer 12 may further include an adjusting aid. The adjusting aid includes at least one of an antifoaming agent, a wetting agent, an antistatic agent and a leveling agent. The staff can improve the performance of the reflective layer 12 by adding the adjusting aid to the matrix material.

[0115] Exemplarily, the antifoaming agent can eliminate the bubbles generated during the mixing process of the matrix material, the reflective material and the adhesion promoter. In this way, bubbles are not easily formed inside the reflective layer 12 made by mixing the matrix material, the reflective material and the adhesion promoter, which can ensure the light reflection effect of the reflective layer 12. Meanwhile, the tightness of the formed reflective layer 12 can also be improved.

[0116] The wetting agent can reduce the surface tension of the liquid formed by mixing the substrate material, the reflective material, and the adhesion promoter. In this way, when the liquid formed by mixing the substrate material, the reflective material, and the adhesion promoter contacts the Fresnel lens layer 13, it can quickly spread on the surface of the Fresnel lens layer 13, thereby evenly covering the surface of the Fresnel lens layer 13.

[0117] The antistatic agent can reduce the risk of static electricity accumulation on the reflective layer 12, thereby avoiding damage to the reflective layer 12 and the functional layer 11 caused by static electricity.

[0118] After the leveling agent is added to the liquid formed by mixing the substrate material, the reflective material, and the adhesion promoter, it can reduce the tension of the liquid formed by mixing the substrate material, the reflective material, and the adhesion promoter. In this way, the liquid formed by mixing the substrate material, the reflective material, and the adhesion promoter can form a flat, smooth, and uniform coating film during the drying and film-forming process, thereby improving the forming effect of the reflective layer 12.

[0119] In some embodiments, the substrate material may include a resin substrate material, a solvent, and a curing agent. The resin matrix can play a connecting role and can connect the reflective material with the components in the curing agent, solvent, adhesion promoter, and regulating auxiliary agent.

[0120] As mentioned above, the adhesion promoter can be combined with the substrate material by chemical bonding. Among them, the adhesion promoter can be chemically bonded with the resin substrate material in the substrate material.

[0121] It can be understood that the material of the resin matrix can be selected accordingly according to the material of the functional layer and the material of the adhesion promoter. Exemplarily, when the material of the Fresnel lens layer 13 is unsaturated polyester or polyether acrylate, the corresponding resin matrix material can be alkyd resin, acrylic resin, or vinyl chloride copolymer. Correspondingly, the adhesion promoter can be at least one of vinyl chloride-vinyl isobutyl ether machine or hydroxybenzylamine.

[0122] When the material of the Fresnel lens layer 13 is unsaturated polyester, polyether acrylate, or epoxy acrylate, the corresponding resin matrix material can be epoxy resin or polyester resin. The adhesion promoter can be at least one of 3-chloropropyltrimethoxysilane and vinyltriethoxysilane.

[0123] The solvent can be used to dissolve the resin matrix material, the curing agent, the adhesion promoter, and the regulating auxiliary agent, so that the components constituting the reflective layer 12 can be uniformly mixed with the reflective material.

[0124] The curing agent can play a curing role, facilitating the curing of the solution formed by mixing the curing agent, reflective material, resin matrix material, solvent, adhesion promoter, and regulating additive to form the reflective layer 12.

[0125] The solvent can include at least one of dimethyl oxalate, xylene, mesitylene, methyl butyl ketone, and ethyl acetate. It can be understood that the type of solvent needs to be selected according to the type of resin matrix material.

[0126] Exemplarily, when the resin matrix material is alkyd resin, acrylic resin, or vinyl chloride copolymer, the solvent can be at least one of dimethyl oxalate and methyl butyl ketone. Or, when the resin matrix material is epoxy resin or polyester resin, the solvent can be at least one of xylene, mesitylene, or ethyl acetate.

[0127] In some embodiments, the weight parts of the reflective material are 5 - 15 parts, the weight parts of the resin matrix material are 20 - 50 parts, the weight parts of the solvent are 30 - 50 parts, the weight parts of the curing agent are 1 - 10 parts, the weight parts of the regulating additive are 1 - 10 parts, and the weight parts of the adhesion promoter are 1 - 5 parts.

[0128] In this way, after the reflective material, resin matrix, solvent, curing agent, regulating additive, and adhesion promoter are mixed, they can preferably form a reflective layer solution, which is convenient for forming the reflective layer 12 after the Fresnel lens layer 13 is cured and molded. At the same time, under the action of the adhesion promoter, the reflective layer 12 can adhere to the Fresnel lens layer 13 and is not easily detached.

[0129] In some embodiments, the weight parts of the reflective material can be 10 parts, the weight parts of the resin matrix material can be 40 parts, the weight parts of the solvent can be 35 parts, the weight parts of the curing agent can be 8 parts, the weight parts of the regulating additive can be 5 parts, and the weight parts of the adhesion promoter can be 2 parts. At this time, the adhesion between the reflective layer 12 and the Fresnel lens layer 13 increases, and the reflective layer 12 is not easily detached.

[0130] In some other embodiments, the weight parts of the reflective material can be 10 parts, the weight parts of the resin matrix material can be 40 parts, the weight parts of the solvent can be 33 parts, the weight parts of the curing agent can be 8 parts, the weight parts of the regulating additive can be 5 parts, and the weight parts of the adhesion promoter can be 4 parts. At this time, as the weight parts ratio of the adhesion promoter increases, the adhesion between the reflective layer 12 and the Fresnel lens layer 13 also increases, and the reflective layer 12 is more not easily detached.

[0131] In some embodiments, a solution formed by mixing a reflective material, a resin matrix, a solvent, a curing agent, a regulating aid, and an adhesion promoter can be coated on the Fresnel lens layer 13 by means of spray printing or evaporation coating. In this way, after curing, the reflective layer 12 can adhere to the surface of the Fresnel lens layer 13, facilitating the processing of the projection screen 1.

[0132] In some embodiments, along the stacking direction of the functional layer 11 and the reflective layer 12, the thickness of the reflective layer 12 is 15um to 50um. Exemplarily, the thickness of the reflective layer 12 can be 15um, 30um, or 50um. It can be specifically set according to the actual situation, and this is only an example here.

[0133] In some embodiments, the reflective material may include aluminum powder. As Figure 17 shown, Figure 17 is a schematic structural diagram of a reflective layer 12 provided by an embodiment of the present application. The aluminum powder can be granular, and the diameter range of the aluminum powder particles can be 5um to 50um. Aluminum powder particles within this range, due to their small diameter, will form a dense reflective surface after the formation of the reflective layer 12. When light irradiates on this reflective surface, the light can be reflected as much as possible, thereby avoiding the waste of light energy.

[0134] At the same time, when selecting aluminum powder particles as the reflective material, the thickness of the reflective layer 12 can be controlled within the range of 15um to 50um. The thickness of the reflective layer 12 is appropriate and not too thick, so that the consumption of aluminum materials can be saved and the manufacturing cost can be reduced.

[0135] In other embodiments, as Figure 18 shown, Figure 18 is another schematic structural diagram of a reflective layer 12 provided by an embodiment of the present application. When the reflective material is aluminum powder, flaky aluminum powder can also be selected. The flaky aluminum powder is sprayed on the Fresnel lens layer 13 by means of spray printing. Because the aspect ratio of the flaky aluminum powder is relatively large and the binding ability of aluminum is strong, it is not easy to fall off. Among them, the range of the aspect ratio of the flaky aluminum powder can be between (40:1) and (100:1).

[0136] It can be understood that the reflective material can also be other materials. Exemplarily, the reflective material can also be silver, or a composition of silver and aluminum. In this way, the reflective material can also reflect light.

[0137] On the other hand, an embodiment of the present application also provides a method for manufacturing any of the above-mentioned projection screens. As Figure 19 shown, Figure 19 is a schematic flow chart of the manufacturing method of the projection screen provided by an embodiment of the present application Figure 1 , and this manufacturing method can include steps S100 to S200.

[0138] S100: Fabricate the functional layer. It can be understood that as Figure 3 shown, the functional layer 11 may include a surface layer 15, a coloring layer 16, a diffusion layer 14, and a Fresnel lens layer 13. In this way, when fabricating the functional layer, it can be fabricated layer by layer to complete the fabrication of the functional layer.

[0139] S200: Fabricate a reflective layer on the surface of one side of the functional layer. After the functional layer is fabricated, a reflective layer can be fabricated on the surface of one side of the functional layer by means of spray printing or evaporation coating.

[0140] Among them, the materials of the reflective layer may include a matrix material, a reflective material, and an adhesion promoter. The reflective material is mixed in the matrix material for reflecting light. The adhesion promoter is mutually fused or chemically bonded with the materials of the functional layer to enhance the adhesion of the reflective layer.

[0141] In this way, taking Figure 3 the projection screen 1 described above as an example, a reflective layer 12 is fabricated on one side of the Fresnel lens layer 13. The adhesion promoter in the reflective layer 12 can make the reflective layer 12 better adhere to the Fresnel lens layer 13 by mutually fusing or bonding with the materials of the Fresnel lens layer 13. Among them, it can be understood that the type of the adhesion promoter needs to correspond to the materials of the Fresnel lens layer 13.

[0142] As can be seen from the above, to fabricate the projection screen 1 provided in this application, a reflective layer 12 needs to be fabricated on one side of the functional layer 11. As Figure 20 shown, Figure 20 is a schematic flow chart of the method for fabricating the projection screen provided in the embodiment of this application Figure 2 , fabricating a reflective layer on one side of the functional layer includes S110 - S130.

[0143] S110: Mix the matrix material, the reflective material, and the adhesion promoter to form a mixed solution. At this time, the reflective material and the adhesion promoter can be relatively evenly dispersed in the matrix material so that the subsequent formed reflective layer has good reflection effect and adhesion.

[0144] S120: Coat the above-mentioned mixed solution on the surface of one side of the functional layer. Exemplarily, it can be coated on the surface of one side of the functional layer by means of spray printing or evaporation coating.

[0145] S130: Under the condition of 50°C to 60°C, dry the above-mentioned mixed solution for 20 min to 50 min so that the mixed solution solidifies to form the reflection layer. At this time, the reflection layer can be formed after the mixed solution solidifies, and the reflection material in the reflection layer can reflect light. During the solidification process, the adhesion promoter and the material of the functional layer are fused or chemically bonded to each other, which can ensure sufficient adhesion between the reflection layer formed after the solidification of the mixed solution and the functional layer. At the same time, solidifying the mixed solution under the above conditions can ensure the solidification effect of the mixed solution, so that the subsequent formed reflection layer has good reflection effect and adhesion effect.

[0146] As described above, the above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A projection screen, characterized in that, Comprising: Functional layer; And, Reflection layer, the reflection layer being stacked on the surface of one side of the functional layer; Wherein, the reflection layer comprises: Matrix material; Reflection material, the reflection material being mixed in the matrix material for reflecting light; and, Adhesion promoter, the adhesion promoter being mixed in the matrix material, the adhesion promoter being at least mutually fused or chemically bonded with the material of the functional layer to enhance the adhesion of the reflection layer.

2. The projection screen according to claim 1, characterized in that, The adhesion promoter comprises at least one of hydroxybenzylamine and vinyl chloride-vinyl isobutyl ether copolymer.

3. The projection screen according to claim 1, characterized in that, The adhesion promoter comprises at least one of 3-chloropropyltrimethoxysilane and vinyltriethoxysilane.

4. The projection screen according to claim 1, characterized in that, The reflection layer further comprises an adjustment aid; the adjustment aid comprises at least one of an antifoaming agent, a wetting agent, an antistatic agent and a leveling agent.

5. The projection screen according to claim 4, characterized in that, The matrix material comprises a resin matrix material, a solvent and a curing agent; Wherein, the weight parts of the reflection material are 5-15 parts; the weight parts of the resin matrix material are 20-50 parts; the weight parts of the solvent are 30-50 parts; the weight parts of the curing agent are 1-10 parts; the weight parts of the adjustment aid are 1-10 parts; the weight parts of the adhesion promoter are 1-5 parts.

6. The projection screen according to claim 5, characterized in that, The weight parts of the reflection material are 10 parts; the weight parts of the resin matrix material are 40 parts; the weight parts of the solvent are 35 parts; the weight parts of the curing agent are 8 parts; the weight parts of the adjustment aid are 5 parts; the weight parts of the adhesion promoter are 2 parts; or, The weight parts of the reflection material are 10 parts; The weight parts of the resin matrix material are 40 parts; the weight parts of the solvent are 33 parts; the weight parts of the curing agent are 8 parts; the weight parts of the adjustment aid are 5 parts; the weight parts of the adhesion promoter are 4 parts.

7. The projection screen according to any one of claims 1 to 6, characterized in that, Along the lamination direction of the functional layer and the reflection layer, the thickness of the reflection layer is 15um-50um; and / or, The reflection material comprises aluminum powder, and the particle size of the aluminum powder is 5um-50um.

8. A method for manufacturing a projection screen, characterized in that, The manufacturing method comprises: Manufacturing a functional layer; and, Manufacturing a reflection layer on the surface of one side of the functional layer; Wherein, the material of the reflection layer comprises: Matrix material; Reflection material, the reflection material being mixed in the matrix material for reflecting light; and, Adhesion promoter, the adhesion promoter being mixed in the matrix material, the adhesion promoter being mutually fused or chemically bonded with the material of the functional layer to enhance the adhesion of the reflection layer.

9. The method for manufacturing a projection screen according to claim 8, characterized in that, Manufacturing the reflection layer on the surface of one side of the functional layer comprises: Mixing the matrix material, the reflection material and the adhesion promoter to form a mixed solution; Coating the mixed solution on the surface of one side of the functional layer; Drying the mixed solution for 20min-50min under the condition of 50°C-60°C to cure the mixed solution to form the reflection layer.

10. A projection device, characterized in that, It includes a projector and the projection screen described in any one of claims 1 to 7; the projector is used to emit projection light towards the projection screen, and the projection screen is used to reflect the projection light projected by the projector; wherein, along the stacking direction of the functional layer and the reflection layer, the projector is located on the side of the functional layer away from the reflection layer.

Images