CN113238451A

CN113238451A - Projection screen and projection system can curl

Info

Publication number: CN113238451A
Application number: CN202110567723.XA
Authority: CN
Inventors: 侯蕊; 王超; 肖伟
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2021-05-24
Filing date: 2021-05-24
Publication date: 2021-08-10
Anticipated expiration: 2041-05-24
Also published as: CN113238451B

Abstract

The application discloses projection screen and projection system can curl relates to projection screen technical field for solve the unable problem of curling of projection screen among the prior art. The projection screen capable of being curled comprises a flexible surface layer, a flexible base material layer, a Fresnel lens layer and a reflecting layer which are sequentially stacked. The flexible substrate layer is provided with a plurality of layers, and in the curling direction of the curlable projection screen, the thickness of the flexible substrate layer close to the front is smaller than that of the flexible substrate layer close to the back. The projection screen capable of being curled can be curled, and is very convenient to transport, install and use.

Description

Projection screen and projection system can curl

Technical Field

The application relates to the technical field of projection screens, in particular to a projection screen capable of being curled and a projection system.

Background

In the field of projection display, especially in the field of ultra-short-focus laser projection display, in order to achieve better brightness and display effect, a projector is generally used in combination with a projection screen having a fresnel microstructure.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a projection screen in the prior art. The above projection screen includes a surface layer 101, a colored layer 102, a diffusion layer 103, a fresnel lens layer 104, and a reflection layer 105, which are sequentially stacked. The surface layer 101 serves to protect the projection screen. The colored layer 102 includes a colored base layer and a dark dye disposed in the colored base layer for enhancing the contrast of the projection screen. The diffusion layer 103 includes a diffusion base layer and diffusion particles 106 disposed in the diffusion base layer, the diffusion particles 106 may be PMMA (Polymethyl Methacrylate), and the diffusion layer 103 is used for diffusing light entering the projection screen along different directions. The side of the fresnel lens layer 104 remote from the diffusing layer 103 is provided with a reflective surface 107, and a reflective layer 105 is coated on the reflective surface 107, the reflective layer 105 typically being a thin metal layer coated on the fresnel lens layer 104.

In the existing projection screen, most of the coloring substrate layer and the diffusion substrate layer are made of MS (methyl methacrylate-styrene copolymer), and the MS has high hardness, so that the projection screen is not curled, and the projection screen which is not curled has high limitation in the transportation and use processes.

Disclosure of Invention

The application aims to provide a projection screen and a projection system which can be curled, and is used for solving the problem that the projection screen in the prior art cannot be curled.

In order to achieve the purpose, the technical scheme is as follows:

in a first aspect, some embodiments of the present application provide a rollable projection screen, which includes a flexible surface layer, a flexible substrate layer, a fresnel lens layer, and a reflective layer, which are sequentially stacked. The flexible substrate layer is provided with a plurality of layers, and in the curling direction of the curlable projection screen, the thickness of the flexible substrate layer close to the front is smaller than that of the flexible substrate layer close to the back.

In the rollable projection screen, the flexible base material layer can be used as a supporting base of the whole rollable projection screen, and the flexible base material layer is made of flexible materials and has flexibility; the flexible surface layer and the Fresnel lens layer are generally made of flexible materials such as UV glue and have flexibility; the reflecting layer is a very thin metal layer coated on the Fresnel lens layer, so that the Fresnel lens layer can be bent, and after the bendable reflecting layer is coated on the Fresnel lens layer, the Fresnel lens layer and the reflecting layer are still flexible as a whole; therefore, the whole rollable projection screen has flexibility and can be rolled, and the rollable projection screen is very convenient in the transportation, installation and use processes. In addition, the flexible substrate layer sets up the multilayer, and in the direction of curling of the projection screen that can curl, the thickness of the flexible substrate layer that leans on in front is less than the thickness of the flexible substrate layer that leans on behind, and therefore, in the direction of curling of the projection screen that can curl, the flexible substrate layer that leans on in front is difficult for receiving the damage at the in-process that curls, and makes this projection screen that can curl more easily curl.

In a possible implementation manner of the first aspect, a thickness difference between two adjacent flexible substrate layers ranges from 30 μm to 50 μm. The thickness of two adjacent flexible substrate layers is set in such a way, so that the rollable projection screen can be curled more easily.

In one possible implementation manner of the first aspect, the flexible substrate layer is a PU flexible substrate layer or a TPU flexible substrate layer. PU (Polyurethane) has flexibility, can curl wantonly and do not warp, has advantages such as wear-resisting, high temperature resistant, toughness is high, resistant oil, mechanical properties are strong simultaneously, uses PU to make flexible substrate layer, can realize this projection screen that can curl not warp. TPU (Thermoplastic polyurethanes, Thermoplastic polyurethane elastomer rubber) has elasticity and can realize curling, and the flexible substrate layer made of TPU can realize the curling of the curlable projection screen without deformation.

In one possible implementation manner of the first aspect, the thickness of the flexible substrate layer ranges from 75 μm to 300 μm.

In one possible implementation of the first aspect, the surface of the flexible surface layer remote from the fresnel lens layer is coated with diffusing particles. Like this, can improve the haze value on the surface that the fresnel lens layer was kept away from to flexible surface layer to can prevent that light from producing specular reflection on the surface that the fresnel lens layer was kept away from to flexible surface layer, avoid formation of image on the ceiling.

In a possible implementation manner of the first aspect, a haze value of a surface of the flexible surface layer away from the fresnel lens layer ranges from 12% to 20%. By the arrangement, the light rays can be prevented from generating mirror reflection on the surface of the flexible surface layer far away from the Fresnel lens layer, and imaging on a ceiling is avoided.

In a possible implementation manner of the first aspect, a surface of the flexible surface layer away from the fresnel lens layer is provided with a plurality of light-transmitting protrusions, and the surface of the light-transmitting protrusions has a tapered portion and/or a divergent portion in a direction away from the fresnel lens layer. With the arrangement, when light enters the curled projection screen and is reflected, the reflected light cannot be gathered on the ceiling, so that a clear image is prevented from being formed on the ceiling. In addition, when light is emitted from the rollable projection screen, the light can be emitted into the air through the surface of the light-transmitting protrusion, and the refractive index of the light-transmitting protrusion is necessarily greater than that of the air, so that the light can be diffused when entering the air through the surface of the light-transmitting protrusion. Specifically, if the tapered portion and/or the tapered portion of the surface of one light-transmitting protrusion extends along the direction a and the outgoing direction of the light is the direction B, the light will tend to diffuse in the direction C when entering the air through the light-transmitting protrusion, and the direction C is perpendicular to both the direction a and the direction B; therefore, the extension direction of the tapered part and/or the tapered part on the surface of the light-transmitting protrusion is reasonably arranged, so that the diffusion direction of light can be controlled, and the viewing angle of the curled projection screen can be directionally controlled.

In one possible implementation manner of the first aspect, the haze value of the surface of the light-transmitting protrusion ranges from 12% to 20%. By this arrangement, the light can be prevented from being specularly reflected on the convex surface of the lens, and further, the clear image on the ceiling can be avoided.

In a possible implementation manner of the first aspect, the rollable projection screen further includes a coloring layer, and the coloring layer is disposed between two adjacent flexible substrate layers; the colored layer includes a flexible colored base layer and a dark dye disposed in the flexible colored base layer. The provision of the coloured layer can improve the contrast of the rollable projection screen. Simultaneously, the dyed layer is located between two adjacent flexible substrate layers, if the material on flexible painted stratum basale has the adhesion nature, then can be in the same place two adjacent flexible substrate layers are fixed through the dyed layer, need not make the dyed layer specially earlier, then it is fixed with two adjacent flexible substrate layers through glue respectively to have reduced the complexity when this can curl the projection screen preparation.

In one possible implementation manner of the first aspect, a dark dye is distributed in one of the flexible substrate layer, the fresnel lens layer, and the reflective layer. Set up like this, can improve this projection screen's that can curl contrast, need not set up the dyed layer again specially simultaneously, can reduce this projection screen's that can curl number of piles and thickness, more do benefit to this projection screen's that can curl curling. In addition, if the dark dye is distributed in the reflecting layer, the reflecting layer can play both a role of reflecting light (reflecting materials are generally distributed in the reflecting layer) and a role of improving the contrast of the rollable projection screen, and the light is partially absorbed by the dark dye only when being reflected on the reflecting layer, so that the light energy loss is small, and further the brightness of the rollable projection screen is high. When the reflective layer is manufactured, a reflective material (such as aluminum and the like) is generally dissolved in a solvent and then sprayed on the Fresnel lens layer, the reflective material is agglomerated when being dissolved in the solvent, in order to prevent the reflective material from agglomerating, a polymerization inhibitor/dispersant is added into the solvent, and a dark dye is generally an organic dye, so that the effect of the polymerization inhibitor/dispersant can be slightly weakened, the reflective material is slightly agglomerated, the flatness of the reflective layer is slightly reduced, light can be scattered to a greater extent when being irradiated on the reflective layer, the diffusion degree of the light is larger, and the viewing angle of the rollable projection screen can be further improved. In addition, the dark dye is generally an organic dye, the organic dye can be dissolved in a high molecular polymer and an organic solvent, the Fresnel lens layer is generally made of UV glue, the UV glue is a high molecular polymer, and the dark dye and the Fresnel lens layer have strong bonding force, so that the reflecting layer is integrally attached to the Fresnel lens layer with high attachment fastness.

In a possible implementation manner of the first aspect, the rollable projection screen further includes a flexible diffusion layer disposed between two adjacent flexible substrate layers, and the rollable projection screen further includes a cavity for containing gas; the flexible diffusion layer comprises an astigmatism structure arranged on a flexible substrate layer, and the astigmatism structure is far away from an astigmatism surface corresponding to the flexible substrate layer and serves as a part of the side wall of the cavity. Set up cavity and the flexible diffusion layer that holds gas in this projection screen that can curl, flexible diffusion layer includes the astigmatism structure, the astigmatic face of astigmatism structure constitutes the partly of cavity lateral wall, then at least partial light can get into in the gas in the cavity and can take place the refraction after the astigmatism structure, and gaseous refracting index is very little, so light can take place the diffusion when getting into the cavity from the astigmatism structure, thereby realize the effect of diffusion light, and then can improve this projection screen's that can curl viewing angle.

In one possible implementation manner of the first aspect, the flexible substrate layer and/or the fresnel lens layer are provided with diffusing particles therein. With this arrangement, light rays are diffused by the diffusion particles while propagating in the rollable projection screen, so that the viewing angle of the rollable projection screen can be improved.

In a second aspect, some embodiments of the present application provide a projection system comprising a projector and a rollable projection screen according to any of the above-described aspects.

Since the projection system provided by the embodiment of the application comprises the rollable projection screen according to any one of the above technical solutions, the two can solve the same technical problem and achieve the same technical effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic diagram of a projection screen according to the prior art;

FIG. 2 is a schematic diagram of a state of use of a projection system according to some embodiments of the present disclosure;

FIG. 3 is a schematic diagram illustrating a usage status of a rollable projection screen according to some embodiments of the present application;

FIG. 4 is a schematic diagram of a rollable projection screen according to yet other embodiments of the present application;

FIG. 5 is a schematic diagram of a rollable projection screen according to yet other embodiments of the present application;

FIG. 6 is a schematic perspective view of the flexible surface layer of FIG. 5;

FIG. 7 is a schematic view of the path of light through the flexible surface layer of FIG. 5;

FIG. 8 is a schematic diagram of a flexible surface layer in a rollable projection screen according to further embodiments of the present application;

FIG. 9 is a schematic diagram of a flexible surface layer in a rollable projection screen according to further embodiments of the present application;

FIG. 10 is a schematic diagram of a flexible surface layer in a rollable projection screen according to further embodiments of the present application;

FIG. 11 is a schematic diagram of a rollable projection screen according to yet other embodiments of the present application;

FIG. 12 is a schematic view of a rollable projection screen according to still other embodiments of the present application;

fig. 13 is a schematic structural view of the flexible substrate layer and the light scattering structure away from the fresnel lens layer of the rollable projection screen in fig. 12;

FIG. 14 is a schematic view of the path of light rays through the flexible substrate layer and the light-diffusing structure of FIG. 12;

FIG. 15 is a schematic diagram illustrating a usage status of a rollable projection screen according to still other embodiments of the present application;

FIG. 16 is a schematic perspective view of the rollable projection screen of FIG. 15;

FIG. 17 is a schematic diagram of a flexible substrate layer and a flexible diffusion layer in a rollable projection screen provided in accordance with further embodiments of the present application;

fig. 18 is a schematic diagram of a flexible substrate layer and a flexible diffusion layer in a rollable projection screen according to further embodiments of the present application.

Reference numerals:

101-a surface layer; 102-a coloured layer; 103-a diffusion layer; 104-a fresnel lens layer; 105-a reflective layer; 106-diffusion particles; 107-reflecting surface; 100-a projection system; 1-a rollable projection screen; 11-a flexible substrate layer; 12-a fresnel lens layer; 121-a reflective surface; 13-a reflective layer; 14-glue layer; 15-a flexible surface layer; 151-light transmissive protrusions; 1511-profile divergent section; 1512-a contour taper section; 16-diffusing particles; 17-a coloured layer; 18-a flexible diffusion layer; 181-astigmatic structure; 182-a base layer; 1821-long groove; 18211-profile diverging section; 18212-profile tapered section; 183-first flexible diffusion layer; 184-a second flexible spreading layer; 2-a projector; 21-incident light; 22-outgoing rays; 3-audience.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

It should be noted that in practical applications, due to the limitation of the precision of the device or the installation error, the absolute parallel or perpendicular effect is difficult to achieve. In the present application, the vertical, parallel or equidirectional description is not an absolute limitation condition, but means that the vertical or parallel structural arrangement can be realized within a preset error range, and a corresponding preset effect is achieved, so that the technical effect of limiting the features can be realized to the maximum extent, and the corresponding technical scheme is convenient to implement and has high feasibility.

In the description of the present application, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. They may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the embodiments of the present application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The application provides a projection system, which is used for allowing audiences to project and play pictures, images and the like.

Referring to fig. 2, fig. 2 is a schematic view illustrating a usage state of the projection system 100 according to some embodiments of the present disclosure. The projection system 100 includes a rollable projection screen 1 and a projector 2. For the convenience of describing the projection system 100, the present application will be described by taking as an example a state in which the rollable projection screen 1 is unfolded in a certain vertical plane, and defining a direction in which the viewer 3 looks at the rollable projection screen 1 as a front view direction.

In use, projector 2 may be placed in front of and below rollable projection screen 1 with audience 3 positioned in front of and looking at rollable projection screen 1. Incident light 21 emitted by the projector 2 is irradiated to the rollable projection screen 1, and the incident light 21 is reflected by the rollable projection screen 1 to finally form emergent light 22 to be irradiated to the audience 3, and images are formed in the rollable projection screen 1.

In the related art, a relatively hard material such as MS is used for a part of the film layers in the projection screen to improve the flatness of the projection screen. However, this can result in a relatively stiff overall projection screen and thus failure to achieve a curl, while an unrolled projection screen is more limited in shipping, installation and use. Accordingly, there is a need for a new rollable projection screen that is more convenient to transport, install, and use.

Based on this, the present application provides a rollable projection screen 1, and referring to fig. 3, fig. 3 is a schematic view illustrating a usage state of the rollable projection screen 1 according to some embodiments of the present application. The rollable projection screen 1 comprises a flexible surface layer 15, a flexible substrate layer 11, a Fresnel lens layer 12 and a reflecting layer 13 which are sequentially stacked; the flexible substrate layer 11 is provided with a plurality of layers (the rollable projection screen 1 illustrated in fig. 3 is provided with two flexible substrate layers 11). In the curling direction of the rollable projection screen 1, the thickness of the front flexible substrate layer 11 is smaller than the thickness of the rear flexible substrate layer 11.

The curling direction of the rollable projection screen 1 may be a counterclockwise direction as shown by a solid arrow in fig. 3, or may be a clockwise direction opposite to the counterclockwise direction as shown by the solid arrow in fig. 3.

When the curling direction of the rollable projection screen 1 is the counterclockwise direction indicated by the solid arrow in fig. 3, the flexible substrate layer 11 distant from the fresnel lens layer 12 is positioned on the front side of the flexible substrate layer 11 close to the fresnel lens layer 12, that is, the thickness of the flexible substrate layer 11 distant from the fresnel lens layer 12 is smaller than the thickness of the flexible substrate layer 11 close to the fresnel lens layer 12.

When the curling direction of the rollable projection screen 1 is clockwise direction opposite to the counterclockwise direction indicated by the solid arrow in fig. 3, the flexible substrate layer 11 close to the fresnel lens layer 12 is positioned on the front side of the flexible substrate layer 11 away from the fresnel lens layer 12, that is, the thickness of the flexible substrate layer 11 close to the fresnel lens layer 12 is smaller than the thickness of the flexible substrate layer 11 away from the fresnel lens layer 12.

Two adjacent flexible substrate layers 11 are bonded together through a glue layer 14, the glue layer 14 can be OCA glue, and certainly, other glue such as UV glue (UV is the abbreviation of Ultra-Violet ray, namely ultraviolet ray, UV glue is also called photosensitive glue, ultraviolet curing glue, shadowless glue, UV light curing glue, and the like) can be used as long as two adjacent flexible substrate layers 11 can be bonded together.

The rollable projection screen 1 illustrated in fig. 3 is provided with two flexible substrate layers 11, in other embodiments, the rollable projection screen 1 may also be provided with three, four, or more flexible substrate layers 11, and the design of the rollable projection screen 1 may be set according to actual conditions.

The flexible substrate layer 11 in the rollable projection screen 1 is made of a flexible material, for example, a PU flexible substrate layer made of a PU material. PU has flexibility, can curl wantonly and not warp, has advantages such as wear-resisting, high temperature resistant, toughness is high, resistant oil, mechanical properties are strong simultaneously, uses PU to make the flexible substrate layer of PU for flexible substrate layer 11 has flexibility and can realize curling.

Of course, in other embodiments, the flexible substrate layer 11 may also be made of other flexible materials, for example, the TPU flexible substrate layer may be made of TPU material, the TPU has elasticity and can realize curling, and the TPU flexible substrate layer may also be made of TPU, so that the flexible substrate layer 11 has flexibility and can realize curling. Alternatively, the flexible substrate layer 11 may be made of a flexible material such as PET (Polyethylene terephthalate), SBC (styrene Block Copolymers), and the flexible substrate layer 11 may be flexible and rollable.

The flexible substrate layer 11 serves as a support base in the entire rollable projection screen 1, so that the entire rollable projection screen 1 has a certain flatness when unfolded. And the more the number of layers of the flexible substrate layer 11, the greater the thickness of each layer of the flexible substrate layer 11, and the better the flatness of the rollable projection screen 1. Meanwhile, the flexible substrate layer 11 also serves as a base for manufacturing the fresnel lens layer 12 and the flexible surface layer 15.

The fresnel lens layer 12 may be made of UV glue curing, and the fresnel lens layer 12 may be curled because the UV glue has elasticity. One side of the fresnel lens layer 12, which is far away from the flexible substrate layer 11, is provided with a plurality of reflection surfaces 121 arranged in the up-down direction, each reflection surface 121 is a plane inclined from top to bottom along the front-view direction, an included angle theta between each reflection surface 121 and the horizontal plane is gradually increased from top to bottom, and the included angle theta is within a range of 5 degrees to 85 degrees.

When preparation fresnel lens layer 12, glue the coating with the UV on the flexible substrate layer 11 that is closest to fresnel lens layer 12, then carry out the impression to fresnel lens layer 12 with special mould for fresnel lens layer 12 shaping, reuse UV light source lamp is glued the UV and is solidified, then the preparation of fresnel lens layer 12 can be accomplished in the drawing of patterns. Of course, in other embodiments, the fresnel lens layer 12 may be made of a heat-curable glue, and the same may be used.

After the fresnel lens layer 12 is manufactured, a reflective layer 13 is coated on each reflective surface 121, and the reflective material in the reflective layer 13 may be aluminum; of course, in other embodiments, the reflective material in the reflective layer 13 may be silver, or a combination of silver and aluminum may be used.

Taking the example of aluminum as the reflective material, the diameter of the aluminum particles is in the range of 5 μm to 20 μm in order to increase the gain of the rollable projection screen 1. In this way, because the diameter of the aluminum particles is small, the directivity is not obvious, most of the light emitted by the projector 2 can be directionally reflected out of the rollable projection screen 1 according to the arrangement of the reflection surface 121 on the fresnel lens layer 12, and the light is not randomly reflected around, so that the gain of the rollable projection screen 1 is high. In addition, because the diameter of the aluminum particles is small, when the reflective surface 121 is covered, the mutual interference among the aluminum particles is small, and the thickness of the reflective layer 13 can be made thin under the condition that the requirement of covering the reflective surface 121 on the whole surface is met; the thinner the reflective layer 13 is, the less aluminum is consumed as a reflective material, which can save cost.

Of course, in some other embodiments, when aluminum is selected, the scale-shaped aluminum powder may be selected, and the range of the aspect ratio of the scale-shaped aluminum powder is (40:1) - (100:1), and since the aspect ratio of the scale-shaped aluminum powder is large, the aluminum has a strong binding ability and is not easily detached when sprayed on the reflecting surface 121.

After the reflective layer 13 is formed, it is generally a metal layer coated on the fresnel lens layer 12, and the thickness is very thin, so that the whole reflective layer 13 can be curled, and the fresnel lens layer 12 can also be curled, so that after the reflective layer 13 is coated on the fresnel lens layer 12, the whole of the fresnel lens layer 12 and the reflective layer 13 still has flexibility, and can be curled.

The provision of the flexible surface layer 15 prevents the surface of the rollable projection screen 1 from being scratched, thereby affecting the display effect of the rollable projection screen 1. The flexible surface layer 15 is made of a flexible material. As an example, the flexible surface layer 15 may be made of UV glue curing, which enables the flexible surface layer 15 to curl up because of the elasticity of the UV glue.

When the flexible surface layer 15 is manufactured, the UV glue is coated on the flexible substrate layer 11 farthest from the Fresnel lens layer 12, and then the UV glue is cured by using a UV light source lamp, so that the flexible surface layer 15 can be manufactured. Of course, in other embodiments, the flexible surface layer 15 may be heat cured on the flexible substrate layer 11 by heat curing glue, and the same may be used.

Based on this, because the flexible surface layer 15, the flexible substrate layer 11, the fresnel lens layer 12 and the reflective layer 13 can be curled, the rollable projection screen 1 can be curled, thereby making the rollable projection screen 1 very convenient in transportation, installation and use.

Further, in the curling direction of the rollable projection screen 1, the degree of curling of the front flexible substrate layer 11 is greater than the degree of curling of the rear flexible substrate layer 11, and therefore the front flexible substrate layer 11 is more likely to be damaged, and in the present application, the thickness of the front flexible substrate layer 11 is set to be smaller than the thickness of the rear flexible substrate layer 11, so that the degree of curling of the front flexible substrate layer 11 is greater, but the thickness is thinner, so that the degree of crush deformation at the curled position is relaxed, and further, the front flexible substrate layer 11 is prevented from being damaged. At the same time, the whole rollable projection screen 1 is made easier to roll up and less resilient after rolling up.

In addition, the thickness difference between two adjacent flexible substrate layers 11 is set to be in the range of 30 μm to 50 μm, for example, 30 μm, 40 μm, or 50 μm may be selected. The difference between the thicknesses of the two adjacent flexible substrate layers 11 is set to be in a range of 30-50 μm, so that the rollable projection screen 1 can be curled more easily, and the flexible substrate layer 11 which is in front in the curling direction is not easy to damage.

Of course, in other embodiments, even if the thickness difference between two adjacent flexible substrate layers 11 is set to be outside the above value range of 30 μm to 50 μm, the thickness difference may be used, for example, 25 μm, 55 μm, or the like may be selected.

In order to make the rollable projection screen 1 more flat when unrolled without affecting the normal rolling of the rollable projection screen 1. In some embodiments, the thickness of each flexible substrate layer 11 is set to be in a range of 75 μm to 300 μm, for example, 75 μm, 100 μm, 150 μm, 200 μm, 250 μm, or 300 μm may be selected and used, and the design may be selected according to actual situations.

Of course, in other embodiments, the thickness of each flexible substrate layer 11 may be set to be out of the above range of 75 μm to 300 μm, for example, 50 μm, 350 μm, or the like may be selected.

Referring to fig. 3, when the rollable projection screen 1 is in use, the incident light 21 emitted from the projector 2 is irradiated to the rollable projection screen 1, the incident light 21 enters the rollable projection screen 1 and is reflected by the reflective layer 13 at the fresnel lens layer 12, and finally exits the rollable projection screen 1 to form the exiting light 22 and irradiate to the audience 3. The path of the light rays in fig. 3 is only illustrated, and the refraction of the light rays is ignored.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a rollable projection screen 1 according to still other embodiments of the present application. In still other embodiments, to achieve ceiling reflection resistance, the surface of flexible surface layer 15 remote from fresnel lens layer 12 is coated with diffusing particles 16. The diffusion particles 16 are coated, so that the haze value of the surface of the flexible surface layer 15 far away from the Fresnel lens layer 12 is large, and the phenomenon that light rays are subjected to mirror reflection when the light rays irradiate the surface of the flexible surface layer 15 far away from the Fresnel lens layer 12 is avoided, and further, clear images are prevented from being formed on a ceiling. In addition, when light is irradiated on the surface of the flexible surface layer 15 away from the fresnel lens layer 12, the light is diffused by the diffusion particles 16, so that the light is more dispersed, and the viewing angle of the rollable projection screen 1 can be improved. The diffusion particles 16 may be made of PMMA.

In order to achieve ceiling reflection resistance, in some embodiments, the haze value of the surface of the flexible surface layer 15 directly away from the fresnel lens layer 12 may be set to a value in a range of 12% to 20%. For example, the haze value may be set to 12%, 15%, 18%, 20%, or the like, and may be used. When the haze value of the surface of the flexible surface layer 15 away from the fresnel lens layer 12 is within the range, the light rays irradiate the surface of the flexible surface layer 15 away from the fresnel lens layer 12 without mirror reflection, and thus the ceiling reflection resistance can be realized.

The haze value of the surface of the flexible surface layer 15 away from the fresnel lens layer 12 is set to be a value in a range of 12% -20%, and can be realized in at least two ways: 1) AG treatment (i.e., anti-glare treatment) is performed on the surface of the flexible surface layer 15 away from the fresnel lens layer 12; 2) the surface of the flexible surface layer 15 away from the fresnel lens layer 12 is embossed with a pattern-engaging pattern by a mold.

Based on this, when manufacturing flexible surface layer 15, with UV glue coating on flexible substrate layer 11 keep away from fresnel lens layer 12's side, then carry out the impression to flexible surface layer 15 with special mould for flexible surface layer 15 shaping, use UV light source lamp to solidify UV glue again, then the preparation of flexible surface layer 15 can be accomplished in the drawing of patterns.

Certainly, in some embodiments, the haze value of the surface of the flexible surface layer 15 away from the fresnel lens layer 12 is greater than 20%, so that the ceiling reflection resistance can be realized, and when the haze value is within the range of 12% -20%, the ceiling reflection resistance effect is good, and the definition of the rollable projection screen 1 is good.

In addition, if the ceiling reflection resistance is not considered, in order to obtain higher definition, the surface of the flexible surface layer 15 far from the fresnel lens layer 12 may be set to be a smooth surface, so that the diffusion of light at the surface of the flexible surface layer 15 far from the fresnel lens layer 12 may be reduced, and the definition of the rollable projection screen 1 may be further improved.

Referring to fig. 5 and 6, fig. 5 is a schematic structural diagram of a rollable projection screen 1 according to still other embodiments of the present application, and fig. 6 is a schematic perspective structural diagram of the flexible surface layer 15 in fig. 5. In still other embodiments, the surface of the flexible surface layer 15 away from the fresnel lens layer 12 is provided with a plurality of light-transmitting protrusions 151, and the surface of the light-transmitting protrusions 151 has a tapered portion and/or a tapered portion in a direction away from the fresnel lens layer 12.

Illustratively, the light-transmitting protrusions 151 provided on the flexible surface layer 15 have a linear semi-cylindrical structure, i.e., the light-transmitting protrusions 151 have a semicircular cross section taken along a plane perpendicular to the longitudinal extension direction thereof. The light-transmitting protrusions 151 on the flexible surface layer 15 are press-molded by a mold when the flexible surface layer 15 is manufactured.

In order to simplify the shape of the die, thereby facilitating the manufacture of the die and reducing the manufacturing cost of the die. The sizes of the semicircular cross sections of the light-transmitting protrusions 151 at each position in the length extending direction are the same, and the shapes and the sizes of the light-transmitting protrusions 151 on the flexible surface layer 15 are the same.

Illustratively, each of the light-transmitting protrusions 151 shown in fig. 5 extends in a vertical direction and is arranged in parallel in a horizontal direction, the horizontal direction is a direction perpendicular to both the front view direction and the vertical direction, and the length extending direction of each of the light-transmitting protrusions 151 is parallel to the flexible substrate layer 11. The light-transmitting protrusions 151 of the flexible surface layer 15 are arranged in series in the horizontal direction, that is, adjacent light-transmitting protrusions 151 are connected in series.

In order to prevent the rollability of the flexible surface layer 15 from being reduced due to the excessively large cross-sectional size of the light-transmitting protrusions 151, the diameter of the semicircular cross-section of the light-transmitting protrusions 151, taken perpendicular to the plane in which the length thereof extends, is set to a value in the range of 20 μm to 300 μm.

The arc surface of each light-transmitting protrusion 151 faces away from the fresnel lens layer 12, and the plane of each light-transmitting protrusion 151 opposite to the arc surface faces the fresnel lens layer 12, which is equivalent to that a straight line of a semicircular cross section of each light-transmitting protrusion 151, which is cut by a surface perpendicular to the length extension direction thereof, is located on one side of the arc line close to the fresnel lens layer 12, so that the profile of the semicircular cross section is tapered in the direction away from the fresnel lens layer 12, and correspondingly, the arc surface of each light-transmitting protrusion 151 is tapered in the direction away from the fresnel lens layer 12.

Referring to fig. 7, fig. 7 is a schematic diagram of a path of light passing through the flexible surface layer 15 in fig. 5, and dotted lines and arrows in fig. 7 are schematic diagrams of a path of light entering air after passing through the flexible surface layer 15. In the process of emitting light, the light passes through the light-transmitting protrusions 151 and then enters the air, so that refraction occurs, and the light is diffused because the refractive index of the UV glue (i.e., the material for manufacturing the flexible surface layer 15) is necessarily greater than that of the air. Furthermore, each of the light-transmitting protrusions 151 has an arc surface which is tapered in a direction away from the fresnel lens layer 12 and extends in the vertical direction, so that light tends to spread in the horizontal direction, and the viewing angle of the rollable projection screen 1 in the horizontal direction can be improved by the light-transmitting protrusions 151.

In other embodiments, the length of the light-transmitting protrusions 151 may also extend along other directions, and correspondingly, light may be diffused along another certain set direction after passing through each light-transmitting protrusion 151 in the emitting process, and the set direction is perpendicular to the front view direction and the length extending direction of each light-transmitting protrusion 151, so as to improve the viewing angle of the rollable projection screen 1 in the set direction.

It should be noted that, the light-transmitting protrusion 151 is a semi-cylindrical structure, and the shape of the light-transmitting protrusion 151 is not limited to be half of a certain cylindrical structure, and in some cases, the area of the cross section of the light-transmitting protrusion 151, which is taken by a plane perpendicular to the length extension direction thereof, may be larger than the area of a corresponding semi-circle or smaller than the area of the corresponding semi-circle, where the corresponding semi-circle is a semi-circle corresponding to a circle having the same curvature as that of the light-transmitting protrusion 151.

The above description has been given taking as an example that each of the light-transmitting protrusions 151 is a long protrusion having a longitudinal extending direction parallel to the flexible base material layer 11. In other embodiments, the light-transmitting protrusion 151 may also be a protrusion with other shapes, for example, it may be a cylindrical structure, the axis of the cylindrical structure is perpendicular to the fresnel lens layer 12, one end of the cylindrical structure away from the fresnel lens layer 12 has an arc surface, the arc surface is tapered or gradually expanded in the front view direction, the arc surface is a long-strip arc surface, and the length of the long-strip arc surface extends in the direction parallel to the flexible substrate layer 11, so that the light can also be diffused.

The above description has been made by taking as an example that each of the light-transmitting protrusions 151 has a semi-cylindrical structure, and the cross section of each of the light-transmitting protrusions 151 taken along a plane perpendicular to the longitudinal extension direction thereof is semi-circular. In some other embodiments, each light-transmitting protrusion 151 may also have a structure with another shape, referring to fig. 8, fig. 8 is a schematic structural view of the flexible surface layer 15 in the rollable projection screen 1 provided in some further embodiments of the present disclosure, a cross section of each light-transmitting protrusion 151 taken by a plane perpendicular to a length extending direction thereof may also be triangular, the corresponding light-transmitting protrusion 151 is a triangular prism-shaped structure, one side surface of the light-transmitting protrusion 151 faces the fresnel lens layer 12 (not shown in the drawings), and an edge opposite to the side surface faces away from the fresnel lens layer 12, so that the light-transmitting protrusion 151 is integrally tapered in a direction away from the fresnel lens layer 12.

Or, referring to fig. 9, fig. 9 is a schematic structural view of the flexible surface layer 15 in the rollable projection screen 1 according to still another embodiment of the present disclosure, a cross section of each light-transmitting protrusion 151, which is cut by a plane perpendicular to a length extending direction thereof, is trapezoidal, a plane where two mutually parallel straight lines in the trapezoidal cross section are defined is a first side surface and a second side surface, respectively, an area of the first side surface is larger than an area of the second side surface, the first side surface faces the fresnel lens layer 12 (not shown in the figure), and the second side surface is far away from the fresnel lens layer 12, so that the light-transmitting protrusion 151 is tapered in a direction far away from the fresnel lens layer 12 as a whole.

Of course, in some other embodiments, the shape of the cross section of each light-transmitting protrusion 151 taken by the plane perpendicular to the length extending direction thereof is not limited to the above three shapes, and may be other shapes as long as the cross section has a contour tapered section and/or a contour diverging section along the direction away from the fresnel lens layer 12, referring to fig. 10, fig. 10 is a schematic structural diagram of the flexible surface layer 15 in the rollable projection screen 1 provided in some other embodiments of the present application, and the cross section of the light-transmitting protrusion 151 on the flexible surface layer 15 taken by the plane perpendicular to the length extending direction thereof has both the contour diverging section 1511 and the contour tapered section 1512 along the direction away from the fresnel lens layer 12 (not shown in the figure).

The above description is made by taking an example in which each of the light-transmitting protrusions 151 has a semi-cylindrical structure parallel to each other, and the semi-cylindrical structure is linear. In other embodiments, the light-transmitting protrusions 151 may not be linear structures, for example, the light-transmitting protrusions 151 may be bent structures or curved structures, and the same may be used; the light-transmitting protrusions 151 may not be parallel to each other, and the same may be used.

The above description is made by taking an example in which the light-transmitting protrusions 151 are arranged continuously in the arrangement direction thereof. In other embodiments, the light-transmitting protrusions 151 may be spaced along the arrangement direction, and the same may be used.

In the above description, each of the light-transmitting protrusions 151 has a semi-cylindrical structure, and the cross sections of the light-transmitting protrusions 151 in the longitudinal extending direction thereof, which are taken along a plane perpendicular to the longitudinal extending direction thereof, are the same. In other embodiments, each of the light-transmitting protrusions 151 may not be a regular structure, and the light-transmitting protrusions 151 may have different cross-sections taken along a plane perpendicular to the longitudinal direction of the light-transmitting protrusions, and may be used.

In order to resist the ceiling reflection, on the basis of the light-transmitting protrusions 151 arranged on the flexible surface layer 15, the haze value of the surface of the light-transmitting protrusions 151 is set to be in a range of 12% -20%. For example, the haze value may be set to 12%, 15%, 18%, 20%, or the like, and may be used. When the haze value of the surface of the light-transmitting protrusion 151 is within this range, specular reflection does not occur when light is irradiated on the surface of the light-transmitting protrusion 151, and thus, reflection from a ceiling can be achieved.

The haze value of the surface of the light-transmitting protrusion 151 is set to be a value within a range of 12% -20%, and can be realized in at least the following two ways: 1) AG treatment (i.e., anti-glare treatment) is performed on the surface of the light-transmitting protrusions 151; 2) the surface of the light-transmitting protrusion 151 is embossed with a pattern-biting pattern by a mold.

Referring to fig. 11, fig. 11 is a schematic structural diagram of a rollable projection screen 1 according to still other embodiments of the present application. In order to improve the contrast of the rollable projection screen 1, the rollable projection screen 1 further comprises a colored layer 17, and the colored layer 17 is disposed between two adjacent flexible substrate layers 11. The colored layer 17 includes a flexible colored base layer and a dark dye disposed in the flexible colored base layer.

The dark color dye is generally an organic dye, and azo dyes, phthalocyanine dyes and the like can be selected. The flexible pigmented base layer is made of a flexible material so that the pigmented layer 17 as a whole is flexible to enable curling, thereby not affecting the curling properties of the whole rollable projection screen 1. For example, the material of the flexible colored base layer may be PET, PU, TPU, SBC, etc., in this case, the colored layer 17 is bonded and fixed to the two adjacent flexible base layers 11 through the adhesive layer 14 after being manufactured. Of course, the material of the flexible coloring base layer may also be UV glue, OCA glue or thermosetting glue, in this case, the coloring layer 17 may be directly formed on one flexible base layer 11, and then bonded with another flexible base layer 11 through its own adhesion property in the curing process, without being bonded and fixed with the flexible base layer 11 through a special glue layer 14.

Of course, in some embodiments, the special coloring layer 17 may not be provided, and the contrast of the rollable projection screen 1 may be improved in other ways. For example, a dark dye may be provided in one of the flexible substrate layer 11, the fresnel lens layer 12, or the reflective layer 13, which may likewise improve the contrast of the rollable projection screen 1. It should be noted that in order to prevent the rollable projection screen 1 from being less bright during use, it is desirable to provide a dark dye in only one of the film layers.

When a dark dye is disposed in the reflective layer 13, on the basis of improving the contrast of the rollable projection screen 1, the light is only partially absorbed by the dark dye when reflected at the reflective layer 13, so that the energy loss is small (if the colored layer 17 is disposed, the light is absorbed twice by the dark dye in the colored layer 17 before and after being reflected by the reflective layer 13, and the energy loss is large), thereby making the rollable projection screen 1 have high brightness when in use. Moreover, the rollable projection screen 1 is not provided with a special coloring layer 17, so that the overall thickness of the rollable projection screen 1 is small, which is more favorable for the rolling of the rollable projection screen 1. In addition, the dark dye enables the aluminum powder to slightly agglomerate in the solvent (when the reflective layer 13 is manufactured, the aluminum powder can be dissolved in the solvent and then sprayed on the reflective surface 121 of the fresnel lens layer 12), so that the flatness of the reflective layer 13 is slightly reduced, light can be scattered to a greater extent when the light irradiates on the reflective layer 13, and the diffusion degree of the light can be improved. The dark dye is an organic dye which can be dissolved in a high molecular polymer and an organic solvent, the Fresnel lens layer 12 is made of UV glue which is a high molecular polymer, so that the dark dye and the Fresnel lens layer 12 have strong bonding force, and the reflection layer 13 is integrally attached to the Fresnel lens layer 12 with high attachment fastness.

Referring to fig. 12 and 13, fig. 12 is a schematic view of a usage state of the rollable projection screen 1 according to still other embodiments of the present disclosure, and fig. 13 is a schematic view of a structure of the flexible substrate layer 11 and the light scattering structure 181, which are far away from the fresnel lens layer 12, of the rollable projection screen 1 in fig. 12. In order to improve the viewing angle of the rollable projection screen 1, the rollable projection screen 1 further comprises a flexible diffusion layer 18 disposed between two adjacent flexible substrate layers 11, and the rollable projection screen 1 further comprises a cavity for containing gas. The flexible diffusion layer 18 includes a light scattering structure 181 disposed on one flexible substrate layer 11, and the light scattering structure 181 is located away from the light scattering surface corresponding to the flexible substrate layer 11 as a part of the cavity sidewall.

In fig. 12, two flexible substrate layers 11 are provided as an example, one flexible substrate layer 11 is far from the fresnel lens layer 12, and the other flexible substrate layer 11 is close to the fresnel lens layer 12. The light scattering structures 181 are strip-shaped protrusions arranged on the flexible substrate layer 11 far away from the fresnel lens layer 12, the flexible diffusion layer 18 includes a plurality of light scattering structures 181, and the flexible substrate layer 11 far away from the fresnel lens layer 12 in fig. 12 is the flexible substrate layer 11 corresponding to the flexible diffusion layer 18. The light diffusion structure 181 has a linear semi-cylindrical structure, that is, the cross section of the light diffusion structure 181 taken along a plane perpendicular to the longitudinal direction thereof has a semi-circular shape, the size of the semi-circular cross section of the light diffusion structure 181 at each position in the longitudinal direction thereof is the same, and the shape and size of each light diffusion structure 181 in the flexible diffusion layer 18 are the same.

Each light scattering structure 181 extends along the vertical direction and is arranged in parallel along the horizontal direction, the length extending direction of each light scattering structure 181 is parallel to the fresnel lens layer 12, and each light scattering structure 181 is arranged continuously along the horizontal direction, that is, adjacent light scattering structures 181 are connected in sequence.

The light dispersion structure 181 is processed by UV paste, and the flexible diffusion layer 18 can be curled because the UV paste has elasticity; in order to prevent the reduction of the flexibility of the flexible diffusion layer 18 due to the excessively large sectional size of the light diffusion structure 181, the diameter of the semicircular section of the light diffusion structure 181 taken by a plane perpendicular to the lengthwise extension direction thereof ranges from 20 μm to 300 μm.

The cambered surface of each light scattering structure 181 faces the fresnel lens layer 12, and the plane of each light scattering structure 181 opposite to the cambered surface faces away from the fresnel lens layer 12, which is equivalent to the straight line of the semicircular cross section of the light scattering structure 181, which is taken by the plane perpendicular to the direction of the length extension thereof, is located on the side of the arc line away from the fresnel lens layer 12, so that the profile of the semicircular cross section is tapered in the front view direction, and correspondingly, the cambered surface of the whole light scattering structure 181 is tapered in the front view direction.

When flexible diffusion layer 18 is made, coating UV glue on the side of flexible substrate layer 11 towards Fresnel lens layer 12 far away from Fresnel lens layer 12 directly, then using the mould of shape and each astigmatism structure 181 adaptation to impress flexible diffusion layer 18, reuse UV light source lamp to solidify UV glue, then the preparation of flexible diffusion layer 18 can be accomplished in the drawing of patterns. After the flexible diffusion layer 18 is demolded, the flexible diffusion layer 18 and the flexible substrate layer 11 close to the fresnel lens layer 12 are bonded together by OCA glue.

After the flexible diffusion layer 18 is bonded and fixed with the flexible substrate layer 11 close to the fresnel lens layer 12, the arc surfaces of the light scattering structures 181 and the flexible substrate layer 11 close to the fresnel lens layer 12 enclose a plurality of cavities for accommodating air, and the arc surfaces of the light scattering structures 181 form a part of the side walls of the cavities. It should be noted that in other embodiments, the cavity may be used to contain other gases, such as nitrogen, argon, methane, etc. The cambered surface of the light scattering structure 181 is the light scattering surface of the light scattering structure 181.

Referring to fig. 14, fig. 14 is a schematic diagram of paths of light rays passing through the flexible substrate layer 11 and the light diffusion structure 181 far from the fresnel lens layer 12 in fig. 12. When light passes through the flexible diffusion layer 18 in the incident process, the light can enter the cavity at the corresponding position from each light scattering structure 181, so refraction occurs, the light can be diffused because the refractive index of the UV glue is inevitably greater than that of air, and moreover, the cambered surface of the light scattering structure 181 is gradually reduced in the front view direction and extends along the vertical direction, so the light can tend to be diffused in the horizontal direction. Each part of the light scattering surface of each light scattering structure 181 is tapered in the front view direction.

Of course, in some other embodiments, the light scattering structures 181 may be formed by coating UV glue on the side of the flexible substrate layer 11 close to the fresnel lens layer 12 and far from the fresnel lens layer 12, in this case, the cambered surface of the light scattering structure 181 faces away from the fresnel lens layer 12, the cambered surface of the light scattering structure 181 and the flexible substrate layer 11 far away from the fresnel lens layer 12 enclose a cavity for accommodating air, light can enter the flexible diffusion layer 18 again after being reflected by the reflection layer 13, when the light passes through the flexible diffusion layer 18 during the exit, the light also enters the cavities at the corresponding positions from the light scattering structures 181, thereby refraction occurs, and further diffusion of light is realized, and the light diffusion structure 181 has a cambered surface, the cambered surface is gradually expanded in the front view direction and extends along the vertical direction, so that the light rays tend to be diffused in the horizontal direction. In this case, each portion of the light diffusing surface of each light diffusing structure 181 is gradually enlarged in the front view direction.

Each light dispersing structure 181 in the flexible diffusing layer 18 extends in the vertical direction, so that light rays tend to diffuse in the horizontal direction when passing through the flexible diffusing layer 18, and the viewing angle of the rollable projection screen 1 in the horizontal direction can be improved. In other embodiments, the length of the light scattering structures 181 may extend along any other direction, and accordingly, the light rays may tend to spread along another set direction when passing through the flexible diffusion layer 18, and the set direction is perpendicular to both the front viewing direction and the length extending direction of the light scattering structures 181, so that the viewing angle of the rollable projection screen 1 in the set direction can be improved.

When this projection screen 1 that can curl uses, light diffuses along setting for the direction, and can not indiscriminate along each direction diffusion, can reduce the diffusion degree of light, and then on improving this projection screen 1 that can curl's the basis of watching the visual angle, can improve this projection screen 1 that can curl's definition and luminance.

In other embodiments, other modifications may be made to the structural shape and arrangement of the light scattering structures 181 in fig. 12 and 13, specifically, the above-described modifications of the light-transmitting protrusions 151 in the flexible surface layer 15 may be referred to, and the modifications thereof are similar and will not be described herein again.

The above description has been given by way of example of one flexible diffusion layer 18 being provided between two adjacent flexible base material layers 11. Referring to fig. 15 and 16, fig. 15 is a schematic view illustrating a usage state of a rollable projection screen 1 according to still other embodiments of the present application, and fig. 16 is a schematic view illustrating a perspective structure of the rollable projection screen 1 in fig. 15. In fig. 15 and 16, two flexible substrate layers 11 are provided as an example, one flexible substrate layer 11 is far from the fresnel lens layer 12, and the other flexible substrate layer 11 is close to the fresnel lens layer 12. In other embodiments, two flexible diffusion layers 18, such as the first flexible diffusion layer 183 and the second flexible diffusion layer 184 in fig. 15, may be disposed between two adjacent flexible substrate layers 11. The first flexible diffusion layer 183 includes a first light scattering structure, and the first light scattering structure is a strip-shaped protrusion disposed on the flexible substrate layer 11 away from the fresnel lens layer 12. The second flexible diffusion layer 184 includes a second light diffusion structure, and the second light diffusion structure is a strip-shaped protrusion disposed on the flexible substrate layer 11 close to the fresnel lens layer 12. The first and second light dispersion structures are similar to the light dispersion structure 181 of fig. 12 and 13, described above, and thus will not be described again,

the first flexible diffusion layer 183 and the second flexible diffusion layer 184 are fixed by bonding with OCA glue, and after the first flexible diffusion layer 183 and the second flexible diffusion layer 184 are fixed by bonding, a plurality of cavities for accommodating air are enclosed between the strip-shaped protrusions of the first flexible diffusion layer 183 and the second flexible diffusion layer 184.

In addition, the length extending directions of the elongated projections of the first flexible diffusion layer 183 and the second flexible diffusion layer 184 are perpendicular to each other, and specifically, the length extending directions may be: the length of each elongated projection in the first flexible diffusion layer 183 extends in the vertical direction, and the length of each elongated projection in the second flexible diffusion layer 184 extends in the horizontal direction.

When light passes through first flexible diffusion layer 183 in the incident process, light can follow each rectangular form arch in first flexible diffusion layer 183 and get into the cavity of corresponding position department to take place the refraction, and then realize the diffusion of light, moreover, rectangular form arch in first flexible diffusion layer 183 has an cambered surface, and this cambered surface is the convergent in the direction of orthographic view, and extends along vertical direction, so light can tend to the horizontal direction diffusion.

When light passes through the second flexible diffusion layer 184 in the emergent process, the light can enter the cavity at the corresponding position from each strip-shaped protrusion in the second flexible diffusion layer 184, thereby refraction occurs, and further diffusion of the light is realized, moreover, the strip-shaped protrusion of the second flexible diffusion layer 184 has an arc surface, and the arc surface is gradually expanded in the front view direction, and extends along the horizontal direction, so the light can tend to be diffused in the vertical direction.

It should be noted that the OCA paste between the first flexible diffusion layer 183 and the second flexible diffusion layer 184 is only used for bonding between the two, and the OCA paste should not be too much filled in the cavity between the strip-shaped protrusions.

The first flexible diffusion layer 183 and the second flexible diffusion layer 184 are provided to realize the diffusion of light in different directions, and further to expand the viewing angle of the rollable projection screen 1 in different directions.

In other embodiments, other modifications may also be made to the structural shapes and arrangement of the elongated protrusions in the first flexible diffusion layer 183 and the second flexible diffusion layer 184 in fig. 15 and 16, specifically, the previously described modifications of the light-transmitting protrusions 151 in the flexible surface layer 15 may be referred to, and the modifications of the two are similar and will not be described again here.

The longitudinal extension direction of each elongated projection in the first flexible diffusion layer 183 and the longitudinal extension direction of each elongated projection in the second flexible diffusion layer 184 are perpendicular to each other. In other embodiments, the length extension direction of each elongated bump in the first flexible diffusion layer 183 and the length extension direction of each elongated bump in the second flexible diffusion layer 184 may not be perpendicular, for example: a projection of an axis of one elongated protrusion in the first flexible diffusion layer 183 on the fresnel lens layer 12 is defined as a first straight line, a projection of an axis of one elongated protrusion in the second flexible diffusion layer 184 on the fresnel lens layer 12 is defined as a second straight line, and an acute angle is included between an extending direction of the first straight line and an extending direction of the second straight line, and a value of the acute angle may be selected from a range of 30 ° or more and less than 90 °, and may also be used.

In other embodiments, the flexible diffusion layer 18 may have other configurations. Referring to fig. 17, fig. 17 is a schematic structural diagram of a flexible substrate layer 11 and a flexible diffusion layer 18 in a rollable projection screen 1 according to still other embodiments of the present application. The flexible diffusion layer 18 includes a base layer 182 disposed on the flexible substrate layer 11 away from the fresnel lens layer 12 (not shown in the figure), and the flexible substrate layer 11 away from the fresnel lens layer 12 constitutes the flexible substrate layer 11 corresponding to the flexible diffusion layer 18. The base layer 182 is made of UV glue, and since the UV glue has elasticity, the base layer 182 may be curled, thereby allowing the flexible diffusion layer 18 to be curled.

The base layer 182 is provided with a plurality of elongated slots 1821 on a side away from the corresponding flexible substrate layer 11, the elongated slots 1821 are linear slots, and the elongated slots 1821 are semicircular slots, that is, the shape of the simulated cross section of the elongated slots 1821 taken by a plane perpendicular to the length extension direction thereof is semicircular, and the simulated cross sections of the elongated slots 1821 are the same in size in the length extension direction thereof. A straight line of the semicircular simulated cross section of the elongated slot 1821, which is cut by a plane perpendicular to the length extension direction of the elongated slot, is located on one side of the arc line away from the corresponding flexible substrate layer 11, so that the outline of the semicircular simulated cross section is gradually expanded in the front view direction, and correspondingly, the wall surface of the elongated slot 1821 is gradually expanded in the front view direction. Each elongated slot 1821 extends in the vertical direction and is arranged in parallel in the horizontal direction, and the length extension direction of each elongated slot 1821 is parallel to the corresponding flexible substrate layer 11. The respective slots 1821 provided in the base layer 182 have the same configuration.

When the base layer 182 is manufactured, UV glue is coated on the side surface, facing the fresnel lens layer 12, of the flexible substrate layer 11 far away from the fresnel lens layer 12, then the base layer 182 is imprinted by using a mold with a shape matched with each elongated slot 1821, then the UV glue is cured by using a UV light source lamp, and then the base layer 182 is manufactured by demolding.

After the base layer 182 is manufactured, the base layer 182 is bonded and fixed to the flexible substrate layer 11 close to the fresnel lens layer 12 by using OCA glue, a cavity for containing air is defined by the groove wall surface of each elongated groove 1821 and the flexible substrate layer 11 close to the fresnel lens layer 12, and it should be noted that the OCA glue is only used for bonding the base layer 182 to the flexible substrate layer 11 close to the fresnel lens layer 12 and should not enter the elongated grooves 1821 too much.

When light passes through the base layer 182 in the incident process, the light enters the corresponding cavity from the wall surface of each slot 1821, and is refracted, so that the light is diffused, and the light tends to be diffused in the horizontal direction because the wall surface of each slot 1821 is divergent in the front view direction and extends in the vertical direction. Each of the long grooves 1821 forms an astigmatism structure provided on the base layer 182, the groove wall surfaces of each of the long grooves 1821 form an astigmatism surface of the astigmatism structure, and each part of the astigmatism surface in embodiment 2 is gradually enlarged in the front view direction.

The length of each slot 1821 in the base layer 182 extends in the vertical direction so that light rays tend to spread in the horizontal direction as they pass through the flexible diffuser layer 18, which improves the viewing angle of the rollable projection screen 1 in the horizontal direction. In other embodiments, the length of the elongated slot 1821 may extend in any other direction, and accordingly, light passing through the flexible diffusion layer 18 may tend to diffuse in a predetermined direction, which is perpendicular to both the front viewing direction and the length extending direction of the elongated slot 1821, so as to improve the viewing angle of the rollable projection screen 1 in the predetermined direction.

The above description has been given taking the elongated slot 1821 as an example in which the longitudinal direction thereof is parallel to the corresponding flexible base material layer 11. In other embodiments, the elongated slot 1821 may also be a groove of another shape, for example, it may be a cylindrical slot as a whole, the axis of the cylindrical slot is perpendicular to the corresponding flexible substrate layer 11, one end of the cylindrical slot close to the corresponding flexible substrate layer 11 has a special-shaped section, the wall surface of the special-shaped section is an arc surface, the arc surface is gradually expanded along the front view direction, the arc surface is a long strip-shaped arc surface, the length of the arc surface extends in a direction parallel to the corresponding flexible substrate layer 11, so that the light can be diffused, the portion corresponding to the special-shaped section forms a light diffusion structure, and the arc surface forms a light diffusion surface.

In the above description, the elongated slot 1821 is a semicircular slot, and the simulated cross section of each elongated slot 1821 taken along a plane perpendicular to the longitudinal direction thereof is semicircular. In other embodiments, each slot 1821 may also be a slot 1821 with other shapes, such as: a cross section of each long groove 1821 taken on a plane perpendicular to the longitudinal direction thereof may be triangular, or a cross section of each long groove 1821 taken on a plane perpendicular to the longitudinal direction thereof may be trapezoidal.

Of course, in other embodiments, the shape of the simulated cross section of each elongated slot 1821 taken along a plane perpendicular to the longitudinal extension direction thereof is not limited to the three shapes, and may be other shapes as long as the simulated cross section has a contour tapered section and/or a contour diverging section in the front view direction (in the case of the simulated cross sections being semicircular and triangular, the simulated cross sections each have only a contour diverging section in the front view direction; in the case of the simulated cross section being trapezoidal, the simulated cross section may have only a contour diverging section or only all contour tapered sections in the front view direction). Referring to fig. 18, fig. 18 is a schematic structural diagram of a flexible substrate layer 11 and a flexible diffusion layer 18 in a rollable projection screen 1 according to still further embodiments of the present disclosure. A simulated cross-section of the slot 1821 provided in the base layer 182 as shown in fig. 18, taken through a plane perpendicular to the direction of elongation thereof, has both a profile diverging section 18211 and a profile converging section 18212 in the front view direction, and may also be used.

The above description has been given by taking an example in which the respective long grooves 1821 are linear grooves parallel to each other. In other embodiments, slot 1821 may not be a linear slot, for example, slot 1821 may be an angled or curved slot, as may be used.

The above description has been given by way of example only, in which each of the long grooves 1821 is a semicircular groove, and the shapes of the simulated cross-sections of the long grooves 1821 at the respective positions in the longitudinal direction thereof, which are taken along a plane perpendicular to the longitudinal direction thereof, are the same. In other embodiments, each slot 1821 may not be a regular slot, and slots 1821 may have different shapes in the simulated cross-section taken perpendicular to the plane through which they extend, and may be used.

In other embodiments, in order to improve the viewing angle of the rollable projection screen 1, diffusion particles may be disposed in at least one of the flexible substrate layer 11 and the fresnel lens layer 12, and the material of the diffusion particles may be PMMA.

For example, two flexible substrate layers 11 are provided, and the diffusion particles may be optionally provided in one of the flexible substrate layers 11, or the diffusion particles may be provided in both of the flexible substrate layers 11.

The present application further provides a rollable projection screen, which has the same structure as the rollable projection screen 1 in the projection system 100, and the details are not repeated herein.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A curlable projection screen is characterized by comprising a flexible surface layer, a flexible base material layer, a Fresnel lens layer and a reflecting layer which are sequentially stacked; the flexible base material layer is provided with a plurality of layers, and in the curling direction of the curlable projection screen, the thickness of the flexible base material layer close to the front is smaller than that of the flexible base material layer close to the back.

2. The rollable projection screen of claim 1, wherein the difference in thickness between two adjacent flexible substrate layers ranges from 30 μ ι η to 50 μ ι η.

3. The rollable projection screen of claim 1 or 2, wherein the flexible substrate layer is a PU flexible substrate layer or a TPU flexible substrate layer.

4. A rollable projection screen according to claim 1 or 2, wherein the thickness of the flexible substrate layer ranges from 75 μ ι η to 300 μ ι η.

5. A rollable projection screen according to claim 1 or 2, wherein the surface of the flexible surface layer remote from the fresnel lens layer is coated with diffusing particles.

6. A rollable projection screen according to claim 1 or 2, wherein the haze value of the surface of the flexible surface layer facing away from the fresnel lens layer ranges from 12% to 20%.

7. A rollable projection screen according to claim 1 or 2, wherein the surface of the flexible surface layer facing away from the fresnel lens layer is provided with a plurality of light-transmitting protrusions, the surface of the light-transmitting protrusions having a tapering and/or a diverging portion in a direction facing away from the fresnel lens layer.

8. A rollable projection screen according to claim 7, wherein the haze value of the surface of the light-transmissive protrusions ranges from 12% to 20%.

9. The rollable projection screen of claim 1 or 2, further comprising a colored layer disposed between two adjacent flexible substrate layers; the colored layer includes a flexible colored base layer and a dark dye disposed in the flexible colored base layer.

10. The rollable projection screen of claim 1 or 2, wherein a dark dye is distributed in one of the flexible substrate layer, the fresnel lens layer, and the reflective layer.

11. The rollable projection screen of claim 1 or 2, further comprising a flexible diffusion layer disposed between two adjacent flexible substrate layers, the rollable projection screen further comprising a cavity for containing a gas; the flexible diffusion layer comprises an astigmatism structure arranged on the flexible substrate layer, and the astigmatism structure is far away from an astigmatism surface corresponding to the flexible substrate layer and serves as a part of the cavity side wall.

12. A projection system comprising a projector and a rollable projection screen according to any of claims 1-11.