CN113671786A

CN113671786A - Wide-viewing-angle projection screen and projection system

Info

Publication number: CN113671786A
Application number: CN202110943217.6A
Authority: CN
Inventors: 肖伟; 张海鹏
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2021-11-19
Also published as: CN117751323A

Abstract

The application discloses wide visual angle projection screen and projection system relates to projection screen technical field for solve the less problem of viewing angle of projection screen among the prior art. The wide-viewing angle projection screen comprises a surface layer, a supporting layer, a Fresnel lens layer and a reflecting layer which are sequentially stacked. The surface that fresnel lens layer was kept away from to the superficial layer is equipped with a plurality of printing opacity archs, and the bellied surface of printing opacity has first curve section with a plurality of intersecting lines of setting for vertical plane, sets for vertical plane perpendicular to wide visual angle projection screen. The wide-angle projection screen is used for allowing audiences to project and play pictures, images and the like.

Description

Wide-viewing-angle projection screen and projection system

Technical Field

The application relates to the technical field of projection screens, in particular to a wide-viewing-angle projection screen 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 projection screen in the prior art, due to the characteristics of the microstructures in the fresnel lens layer 104, light rays emitted by the projector are reflected by the reflecting layer 105 and then drawn close to the middle, so that the gain of the projection screen is increased, the viewing angle of the projection screen is inevitably reduced, and the viewing experience of audiences is further influenced.

Disclosure of Invention

An object of the present application is to provide a wide viewing angle projection screen and a projection system, which are used to solve the problem of small viewing angle of the projection screen in the prior art.

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

in a first aspect, some embodiments of the present application provide a wide viewing angle projection screen, which includes a surface layer, a support layer, a fresnel lens layer, and a reflection layer, which are sequentially stacked. The surface that fresnel lens layer was kept away from to the superficial layer is equipped with a plurality of printing opacity archs, and the bellied surface of printing opacity has first curve section with a plurality of intersecting lines of setting for vertical plane, sets for vertical plane perpendicular to wide visual angle projection screen.

In the description of the features of the wide view projection screen, the wide view projection screen is described in a state in which the wide view projection screen is expanded in a certain vertical plane, but the wide view projection screen is not limited to being expanded only in the vertical plane.

In the wide-viewing-angle projection screen, the supporting layer serves as an assembly foundation and a supporting foundation of the whole wide-viewing-angle projection screen, and the surface layer and the Fresnel lens layer are respectively attached to two opposite sides of the supporting layer. The surface layer is provided with the light-transmitting bulges, light rays enter air after passing through the surfaces of the light-transmitting bulges in the emergent process and are refracted, and the refraction index of the light-transmitting bulges is inevitably larger than that of the air, so that the light rays can be diffused in the emergent process. And in this wide visual angle projection screen, the bellied surface of printing opacity has first curve section with a plurality of intersecting lines of setting for vertical plane, this is comparatively complicated (compare in the straight line) at the line type that tends to the bellied surface of printing opacity to extend from top to bottom, and then makes the big or small kind of incident angle of light when the bellied surface of printing opacity that first curve section corresponds more, then the direction of light after the outgoing is just also more, the scope of covering is wider on the upper and lower direction after the light outgoing, thereby realize the bigger diffusion to light on the upper and lower direction, then this wide visual angle projection screen is also bigger on the viewing angle of upper and lower side.

In one possible implementation manner of the first aspect, the first curved section includes a first gradually-approaching section extending from top to bottom close to the fresnel lens layer and a first gradually-distant section extending from top to bottom far from the fresnel lens layer; the first approaching section is provided with a plurality of first approaching sections, and/or the first gradually-distant section is provided with a plurality of first gradually-distant sections. Set up like this for the bellied surface of printing opacity is more complicated at the line type that tends to the vertical direction extension, has further increased the direction behind the light emergence, and the scope of covering is wider in the vertical direction after the light emergence, has further improved this wide visual angle projection screen and has watched the visual angle in vertical direction.

In a possible implementation manner of the first aspect, an intersection line of the surface of the light-transmitting protrusion and a plurality of set horizontal planes has a second curve segment, and the set horizontal planes are perpendicular to the wide-viewing-angle projection screen. Thus, the line type of the surface of the light-transmitting protrusion extending in the direction of the first horizontal direction (the first horizontal direction is defined to be perpendicular to the horizontal direction of the set vertical plane) is complex (compared with a straight line), so that the sizes and types of the incident angles of the light rays passing through the surface of the light-transmitting protrusion corresponding to the second curve segment are more, the directions of the light rays after being emitted are more, the range covered by the light rays after being emitted in the first horizontal direction is wider, the light rays are more diffused in the first horizontal direction, and the viewing angle of the wide-viewing-angle projection screen in the first horizontal direction is larger.

In one possible implementation manner of the first aspect, the wide view projection screen includes a first end and a second end in a first horizontal direction, and the first horizontal direction is perpendicular to a thickness direction of the wide view projection screen. The second curve section comprises a second asymptotic section and a second distancing section, wherein the second asymptotic section extends from the first end to the second end and extends close to the Fresnel lens layer, and the second distancing section extends from the first end to the second end and extends away from the Fresnel lens layer; the second asymptotic section is provided with a plurality of sections, and/or the second distancing section is provided with a plurality of sections. Set up like this for the bellied surface of printing opacity is more complicated at the line type that tends to first horizontal direction extension, has further increased the direction behind the light emergence, and the scope that covers in first horizontal direction after the light emergence is wider, has further improved the viewing angle of this wide visual angle projection screen on first horizontal direction.

In one possible implementation manner of the first aspect, a maximum dimension of the light-transmitting protrusion in the up-down direction is larger than a maximum dimension of the light-transmitting protrusion in the first horizontal direction. The wide viewing angle projection screen requires a larger expansion of the viewing angle in the first horizontal direction than in the vertical direction during use. Above-mentioned setting can be so that this wide visual angle projection screen sets up more printing opacity archs along first horizontal direction, and then makes the more complicated of the line type of wide visual angle projection screen's surface on first horizontal direction to it is more obvious to make this wide visual angle projection screen to watch the visual angle expansion on first horizontal direction.

In a possible implementation manner of the first aspect, the light-transmitting protrusions are arranged in a plurality of rows and a plurality of columns, each row is provided with a plurality of light-transmitting protrusions, and each column is provided with a plurality of light-transmitting protrusions. Set up like this for the bellied quantity of printing opacity on the wide visual angle projection screen is more, has improved the complexity of the line type on this wide visual angle projection screen surface, and then makes this wide visual angle projection screen's the visual angle that watches enlarge more obvious.

In a possible implementation manner of the first aspect, the light-transmitting protrusions are arranged in a rectangular array. The printing opacity is protruding generally to be made through special mould impression in superficial layer forming process, sets up the printing opacity arch and is rectangular array and arranges for the bellied regularity of printing opacity on the superficial layer is higher, and then can reduce special mould's structural complexity, thereby reduces special mould's design cost and cost of manufacture.

In one possible implementation of the first aspect, the diffusing particles are distributed in at least one of the surface layer, the support layer, and the fresnel lens layer. By the arrangement, the diffusion degree of the wide-viewing-angle projection screen to light can be further improved, so that the viewing angle of the wide-viewing-angle projection screen is further improved.

In one possible implementation of the first aspect, a dark dye is distributed in one of the surface layer, the support layer, the fresnel lens layer, and the reflective layer. By the arrangement, the contrast of the wide-viewing-angle projection screen can be improved, and meanwhile, a coloring layer does not need to be specially arranged, so that the number of layers of the wide-viewing-angle projection screen can be reduced, the thickness of the wide-viewing-angle projection screen is reduced, and the cost is reduced; moreover, if the wide-angle projection screen can be curled, the thickness of the wide-angle projection screen is reduced, and the curling performance of the wide-angle projection screen can be improved. 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 wide-angle 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 wide-angle projection screen is high. When the reflecting layer is manufactured, a reflecting material (such as aluminum and the like) is generally dissolved in a solvent and then sprayed on the Fresnel lens layer, dark dyes are generally organic dyes, the reflecting material can be slightly agglomerated in the solvent, so that the flatness of the reflecting layer is slightly reduced, light can be scattered to a greater degree when the light irradiates on the reflecting layer, the light diffusion degree is greater, and the viewing angle of the wide-viewing-angle projection screen can be 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 one possible implementation manner of the first aspect, the reflective layer is a powdered aluminum reflective layer, and the diameter of aluminum particles in the powdered aluminum reflective layer ranges from 5 μm to 20 μm. The diameter range of aluminum particles in the powder aluminum reflecting layer is 5-20 mu m, the diameter of the aluminum particles in the range is small, the particles are uniform, the directivity is not obvious, and a compact reflecting plane can be formed after the powder aluminum reflecting layer is formed; when light irradiates on the powder aluminum reflecting layer, the reflecting path of the light is mainly determined by the inclination angle of the reflecting surface of the Fresnel lens layer, and the phenomenon that the light is randomly reflected by aluminum particles because the aluminum particles are large can not occur; therefore, the light can be irradiated to the audience according to the set direction, the waste of light energy is reduced, and the gain of the wide-viewing-angle projection screen is higher. In addition, the powder aluminum reflecting layer needs to fully cover the reflecting surface of the Fresnel lens layer, and the smaller the diameter of the aluminum particles is, the thinner the thickness of the powder aluminum reflecting layer can be made under the condition of meeting the requirement of fully covering the reflecting surface of the Fresnel lens layer; the thinner the powder aluminum reflecting layer is made, the less the number of aluminum particles is needed, so that the manufacturing cost of the powder aluminum reflecting layer can be saved.

In one possible implementation manner of the first aspect, the reflective layer is an aluminum reflective layer, and the aluminum particles in the aluminum reflective layer are scale-shaped aluminum powder. The ratio of the diameter to the thickness of the scaly aluminum powder was in the range of (40:1) to (100:1), and it was found that the ratio of the diameter to the thickness of the scaly aluminum powder was large. The aluminum particles in the aluminum reflecting layer of the wide-viewing-angle projection screen are made of scale-shaped aluminum powder, and the scale-shaped aluminum powder has a large diameter-thickness ratio, so that the scale-shaped aluminum powder has strong binding capacity with a binding agent (such as a solvent in an aluminum powder solution) in the aluminum reflecting layer, and the probability of falling off of the aluminum particles in the aluminum reflecting layer can be reduced.

In a second aspect, some embodiments of the present application provide a projection system, which includes a projector and a wide viewing angle projection screen as described in any of the above solutions.

Since the projection system provided by the embodiment of the application comprises the wide-viewing-angle projection screen according to any one of the above technical schemes, 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 cross-sectional view of a wide-angle projection screen of a projection system according to some embodiments of the present disclosure, taken along a vertical plane;

FIG. 4 is a schematic diagram illustrating a use state of a part of the structure in FIG. 3;

FIG. 5 is a schematic view of the surface layer of FIG. 4 with the light-transmissive protrusions removed;

fig. 6 is a schematic diagram illustrating a partial structure of a wide viewing angle projection screen in a projection system according to some embodiments of the present application;

FIG. 7 is a schematic view of the structure of FIG. 6 in use;

FIG. 8 is a cross-sectional view of a wide viewing angle projection screen of a projection system according to some embodiments of the present disclosure taken at a predetermined horizontal plane;

FIG. 9 is a schematic view of a portion of the structure of FIG. 8 in use;

FIG. 10 is a schematic view of the surface layer of FIG. 9 with the light-transmissive protrusions removed;

FIG. 11 is a schematic diagram illustrating a partial structure of a wide-angle projection screen in a projection system according to another embodiment of the present application;

FIG. 12 is a schematic view of the structure of FIG. 11 in use;

fig. 13 is a schematic structural diagram of a fresnel lens layer and a reflective layer in a wide-angle projection screen in a projection system according to some embodiments of the present disclosure;

fig. 14 is a schematic structural diagram of a fresnel lens layer and a reflective layer in a wide-angle projection screen in a projection system according to another embodiment of the present disclosure;

FIG. 15 is an expanded view of a wide-angle projection screen in a projection system according to some embodiments of the present disclosure;

fig. 16 is an expanded view of a wide-angle projection screen in a projection system according to still other embodiments of the present application;

fig. 17 is a schematic structural diagram of a wide-angle projection screen in a projection system according to still other 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 wide viewing angle projection screen; 11-a surface layer; 111-light transmissive protrusions; 1111-a first curve segment; 11111-first progressive segment; 11112-first, progressively distant segment; 1112-a second curve segment; 11121-second, progressive segment; 11122-second, distal section; 12-a support layer; 121-a support substrate; 13-a fresnel lens layer; 131-a reflective surface; 14-a reflective layer; 15-diffusing particles; 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. The vertical, parallel or same-directional descriptions in this application are not an absolute limiting condition, but rather indicate that the vertical or parallel structural arrangement can be realized within a preset error range and achieve a corresponding preset effect, so that the technical effect of limiting features can be realized maximally, the corresponding technical scheme is convenient to implement, and the feasibility is high.

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 wide viewing angle projection screen 1 and a projector 2.

For convenience of describing the projection system 100, the present application will be described by taking a state of the wide-angle projection screen 1 when it is unfolded in a vertical plane as an example, and a direction of the audience 3 looking at the wide-angle projection screen 1 is a front view direction of the wide-angle projection screen 1, that is, a thickness direction of the wide-angle projection screen 1.

In use, the projector 2 may be placed in front of and below the wide view projection screen 1, and the viewer 3 may be positioned in front of the projection screen 1 and look at the wide view projection screen 1. The incident light 21 emitted from the projector 2 is irradiated to the wide-angle projection screen 1, and the incident light 21 is reflected by the wide-angle projection screen 1 to finally form an emergent light 22 to be irradiated to the audience 3, and simultaneously, images are formed in the wide-angle projection screen 1.

In the related art, due to the characteristics of the microstructures in the fresnel lens layer, the light emitted by the projector 2 is reflected by the reflecting layer and then approaches to the middle, so that the viewing angle of the projection screen is inevitably reduced while the gain of the projection screen is improved, and the viewing experience of the audience 3 is further influenced.

Based on this, referring to fig. 3, fig. 3 is a schematic cross-sectional view of a wide-angle projection screen 1 in a projection system 100 provided in some embodiments of the present application, where the wide-angle projection screen 1 includes a surface layer 11, a support layer 12, a fresnel lens layer 13, and a reflection layer 14, which are sequentially stacked.

Referring to fig. 3, the surface of the surface layer 11 away from the fresnel lens layer 13 is provided with a plurality of light-transmitting protrusions 111, and an intersection line of the surface of the light-transmitting protrusions 111 and a plurality of set vertical planes (not shown in the figure) has a first curve section 1111, and the set vertical planes are perpendicular to the wide-viewing angle projection screen 1.

It should be noted that the vertical plane is set as an assumed reference plane, and is not present in the wide-angle projection screen 1, and the vertical plane is configured to: when the wide view angle projection screen 1 is unfolded along a certain vertical plane, the set vertical plane is perpendicular to the wide view angle projection screen 1.

It should be noted that, the present application is not limited to how many intersecting lines of the light-transmitting protrusion 111 and the set vertical plane have the first curved section 1111, and in fact, since the surface of the light-transmitting protrusion 111 is a continuous surface, there should be an infinite number of intersecting lines of the set vertical plane and the light-transmitting protrusion 111 having the first curved section 1111.

It should be further noted that the first curved section 1111 is not limited to a portion of an intersection line of a specific set vertical plane and the surface of the light-transmitting protrusion 111, and each set vertical plane may intersect with the surface of the light-transmitting protrusion 111 to form the first curved section 1111.

Based on this, because the surface of the light-transmitting protrusion 111 and the intersection line of a plurality of set vertical planes have the first curve section 1111, the line type that the surface of the light-transmitting protrusion 111 extends in the vertical direction tends to be more complicated (compared with a straight line), and then the size of the incident angle of the light passing through the surface of the light-transmitting protrusion 111 corresponding to the first curve section 1111 is more, and then the direction of the light after being emitted is also more, the range of the light covered in the vertical direction after being emitted is wider, thereby realizing the greater diffusion of the light in the vertical direction, and then the viewing angle of the wide-viewing angle projection screen 1 in the vertical direction is also larger. In addition, the light-transmitting protrusions 111 are arranged, so that the surface of the surface layer 11, which is far away from the Fresnel lens layer 13, has higher roughness, and a certain effect of reducing the ceiling reflection phenomenon is achieved.

Specifically, referring to fig. 4, fig. 4 is a schematic diagram illustrating a use state of a part of the structure in fig. 3. Light emitted by the projector 2 extends along the directions indicated by the dotted lines and arrows in fig. 4 (ignoring refraction of the light between the film layers in the wide-angle projection screen 1), the light is reflected by the reflective layer 14 and then emitted along the thickness direction of the wide-angle projection screen 1, and when the light passes through the surface of the light-transmitting protrusion 111 on the surface layer 11, because the surface of the light-transmitting protrusion 111 tends to have a relatively complex linear shape extending in the up-down direction, the light is refracted when passing through the surface of the light-transmitting protrusion 111 (it should be noted that the direction of the light after being emitted in fig. 4 is only illustrated, and it is not necessarily limited that the light is emitted according to the direction illustrated in fig. 4), so that the light can be spread in the up-down direction, and the viewing angle of the wide-angle projection screen 1 in the up-down direction is relatively large.

On the contrary, referring to fig. 5, fig. 5 is a schematic view illustrating that the light-transmitting protrusions 111 on the surface layer 11 in fig. 4 are removed. Light that projector 2 sent extends along dotted line and the direction that the arrow shows in fig. 5 (neglecting the refraction of light between each rete in wide visual angle projection screen 1), and light can follow the thickness direction outgoing of wide visual angle projection screen 1 after 14 reflections of reflection stratum, and perpendicular to superficial layer 11 keeps away from the surface of fresnel lens layer 13 when the outgoing, so can not take place the refraction, and then can't realize following upper and lower direction diffusion light, then it is less at the ascending visual angle of watching of up and down side.

It should be noted that the expression "tends to extend in the up-down direction" is used for the sake of explanation and is not limited to the case where the surface of the light-transmitting protrusion 111 extends only in the up-down direction, and the surface of the light-transmitting protrusion 111 extends in the up-down direction and also extends closer to and/or farther from the fresnel lens layer 13.

To further improve the viewing angle of the wide-angle projection screen 1 in the up-down direction, referring to fig. 4, in some embodiments, the first curved section 1111 includes a first gradually-approaching section 11111 extending from top to bottom near the fresnel lens layer 13 and a first gradually-distant section 11112 extending from top to bottom far from the fresnel lens layer 13.

Therefore, the line type of the surface of the light-transmitting protrusion 111 extending in the vertical direction is more complex, the direction of the emitted light is further increased, the range of the emitted light in the vertical direction is wider, and the viewing angle of the wide-viewing-angle projection screen 1 in the vertical direction is further improved.

It should be noted that the number of the first gradually-approaching segment 11111 and the first gradually-departing segment 11112 included in the first curve segment 1111 is not limited in the present application. Referring to fig. 4, in some embodiments, there is one for each of the first asymptotic segment 11111 and the first asymptotic segment 11112. Referring to fig. 6, fig. 6 is a schematic view of a partial structure of the wide-angle projection screen 1 in the projection system 100 according to some embodiments of the present disclosure, and in some other embodiments, two first gradually-approaching segments 11111 and two first gradually-departing segments 11112 may be provided, and the same can be used. Of course, two first gradually-decreasing segments 11111 and one first gradually-decreasing segment 11112 may be provided, or two first gradually-decreasing segments 11111 and two first gradually-decreasing segments 11112 may be provided, or more than three first gradually-decreasing segments 11111 or more than three first gradually-decreasing segments 11112 may be provided. And the more the first gradually-approaching segment 11111 and the first gradually-distant segment 11112 are provided, the more complicated the line shape of the surface of the light-transmitting protrusion 111 extending in the upward and downward direction tends to be, and the larger the viewing angle of the wide-angle projection screen 1 in the upward and downward direction becomes.

Referring to fig. 7, fig. 7 is a schematic diagram illustrating a use state of the structure of fig. 6. Taking the example that the first asymptotic segment 11111 and the first gradually distancing segment 11112 are respectively provided with two segments, the light emitted by the projector 2 extends along the directions indicated by the dotted lines and the arrows in fig. 7 (ignoring the refraction of the light between the film layers in the wide-viewing-angle projection screen 1), and since the line type of the surface of the light-transmitting protrusion 111 extending in the up-down direction is more complex (compared with the light-transmitting protrusion 111 shown in fig. 4), the range in which the light can be diffused in the up-down direction after being emitted is wider (it should be noted that the direction of the light after being emitted in fig. 7 is only illustrated, and it is not limited that the light is emitted in the direction shown in fig. 7), so that the viewing angle of the wide-viewing-angle projection screen 1 in the up-down direction is larger.

It should be noted that, the first gradually-approaching segment 11111 and the first gradually-departing segment 11112 are not provided for a specific light-transmitting protrusion 111 in the first curve segment 1111, and in the whole wide-angle projection screen 1, the first gradually-approaching segment 11111 and the first gradually-departing segment 11112 may be provided for all the first curve segments 1111 corresponding to the light-transmitting protrusions 111 according to the above rule, or the first gradually-approaching segment 11111 and the first gradually-departing segment 11112 may be provided for some of the first curve segments 1111 corresponding to the light-transmitting protrusions 111 according to the above rule.

Of course, in some embodiments, the first curved section 1111 may be provided with only the first asymptotic section 11111, or only the first asymptotic section 11112, and the same may be used.

In order to improve the viewing angle of the wide viewing angle projection screen 1 in the horizontal direction. Referring to fig. 8, fig. 8 is a schematic cross-sectional view of a wide-viewing angle projection screen 1 in a projection system 100 according to some embodiments of the present disclosure, which is taken along a horizontal plane. In some embodiments, the intersection line of the surface of the light-transmissive protrusion 111 and a plurality of set horizontal planes has a second curve segment 1112, and the set horizontal planes are perpendicular to the wide-viewing angle projection screen 1.

It should be noted that the set horizontal plane is an assumed reference plane, and does not exist in the wide-angle projection screen 1, and the set horizontal plane is configured to: when the wide-angle projection screen 1 is unfolded along a vertical plane, the set horizontal plane is perpendicular to the wide-angle projection screen 1.

It should be noted that, the second curve segment 1112 is not limited to how many intersecting lines of the light-transmitting protrusion 111 and the set horizontal planes are, in fact, because the surface of the light-transmitting protrusion 111 is a continuous surface, there should be an infinite number of intersecting lines of the set horizontal planes and the light-transmitting protrusion 111 having the second curve segment 1112.

It should be further noted that the second curve segment 1112 is not limited to a part of an intersection line of a specific set horizontal plane and the surface of the light-transmitting protrusion 111, and each set horizontal plane may intersect with the surface of the light-transmitting protrusion 111 to form the second curve segment 1112.

Based on this, since the intersection line of the surface of the light-transmitting protrusion 111 and the plurality of set horizontal planes has the second curve segment 1112, this makes the line type of the surface of the light-transmitting projection 111 extending in the direction toward the first horizontal direction (the first horizontal direction is defined as the horizontal direction perpendicular to the aforementioned set vertical plane, i.e., the left-right direction in fig. 8, and at the same time, the first horizontal direction is also perpendicular to the thickness direction of the wide-angle projection screen 1) more complicated (compared to a straight line), thereby increasing the magnitude of the incident angle of the light passing through the surface of the light-transmitting protrusion 111 corresponding to the second curve segment 1112, the direction of the light after exiting is more, the range covered by the light after exiting in the first horizontal direction is wider, thereby achieving greater diffusion of light in the first horizontal direction, the viewing angle of the wide-viewing-angle projection screen 1 in the first horizontal direction is also greater.

Specifically, referring to fig. 9, fig. 9 is a schematic view of a use state of a part of the structure in fig. 8. Light emitted by the projector 2 extends along the directions indicated by the dotted lines and arrows in fig. 9 (ignoring refraction of light between film layers in the wide-angle projection screen 1), the light is reflected by the reflective layer 14 and then emitted along the thickness direction of the wide-angle projection screen 1, and when passing through the surface of the light-transmitting protrusion 111 on the surface layer 11, because the surface of the light-transmitting protrusion 111 tends to have a relatively complex linear shape extending in the left-right direction, the light is refracted when passing through the surface of the light-transmitting protrusion 111 (it should be noted that the direction of the light after being emitted in fig. 9 is only illustrated, and it is not limited that the light is emitted in the direction shown in fig. 9), so that the light can be spread in the left-right direction, and further the viewing angle of the wide-angle projection screen 1 in the left-right direction is relatively large.

On the contrary, referring to fig. 10, fig. 10 is a schematic view illustrating the light-transmitting protrusions 111 on the surface layer 11 in fig. 9 are removed. Light that projector 2 sent extends along dotted line and the arrow in fig. 10 shows the direction (neglecting the refraction of light between each rete in wide visual angle projection screen 1), and light can follow the thickness direction outgoing of wide visual angle projection screen 1 after 14 reflection on reflection stratum, and perpendicular to superficial layer 11 keeps away from the surface of fresnel lens layer 13 when the outgoing, so can not take place the refraction, and then can't realize following left right direction diffusion light, then it is less to watch the visual angle in left right direction.

It should be noted that the expression "extends in the first horizontal direction (left-right direction)" is used for the sake of explanation and is not limited to the case where the surface of the light-transmitting protrusion 111 extends only in the first horizontal direction (left-right direction), and the surface of the light-transmitting protrusion 111 extends in the first horizontal direction (left-right direction) and also extends closer to and/or farther from the fresnel lens layer 13.

To further improve the viewing angle of the wide-angle projection screen 1 in the first horizontal direction, referring to fig. 9, in some embodiments, the wide-angle projection screen 1 includes a first end and a second end in the first horizontal direction, for example, a right end of the wide-angle projection screen 1 when expanded in the vertical plane is the first end, and a left end of the wide-angle projection screen 1 when expanded in the vertical plane is the second end. The second curved section 1112 includes a second gradually-close section 11121 extending from the first end to the second end and extending close to the fresnel lens layer 13, and a second gradually-far section 11122 extending from the first end to the second end and extending away from the fresnel lens layer 13.

Based on this, the line extending towards the first horizontal direction on the surface of the light-transmitting protrusion 111 is more complex, the direction of the emitted light is further increased, the range covered in the first horizontal direction after the light is emitted is wider, and the viewing angle of the wide-viewing-angle projection screen 1 in the first horizontal direction is further improved.

It should be noted that the number of the second gradually-approaching segments 11121 and the second gradually-departing segments 11122 included in the second curve segment 1112 is not limited in the present application. Referring to fig. 9, in some embodiments, there is one of each of the second asymptotic segment 11121 and the second asymptotic segment 11122. Referring to fig. 11 and fig. 11 are schematic views illustrating a partial structure of a wide-angle projection screen 1 in a projection system 100 according to other embodiments of the present disclosure, in other embodiments, two second gradually-approaching segments 11121 and two second gradually-departing segments 11122 may be provided, and the same can be used. Of course, two second gradually-decreasing segments 11121 and one second gradually-decreasing segment 11122 may be provided, or two second gradually-decreasing segments 11121 and two second gradually-decreasing segments 11122 may be provided, or more than three second gradually-decreasing segments 11121 or more than three second gradually-decreasing segments 11122 may be provided. And the more the second gradually-approaching segment 11121 and the second gradually-distant segment 11122 are provided, the more complicated the line shape of the surface of the light-transmitting protrusion 111 extending in the direction toward the first horizontal direction, and the larger the viewing angle of the wide-angle projection screen 1 in the first horizontal direction.

Referring to fig. 12, fig. 12 is a schematic view showing a use state of the structure of fig. 11. Taking two second asymptotic segments 11121 and two second gradually distant segments 11122 as an example, the light emitted by the projector 2 extends in the directions indicated by the dotted lines and arrows in fig. 12 (ignoring the refraction of the light between the film layers in the wide viewing angle projection screen 1), and since the surface of the light-transmitting protrusion 111 is more complicated in the line form that tends to extend in the left-right direction (compared with the light-transmitting protrusion 111 shown in fig. 9), the range in which the light can be diffused in the left-right direction after being emitted is wider (it should be noted that the direction of the light after being emitted in fig. 12 is merely illustrated, and it is not limited that the light is emitted in the direction shown in fig. 12), so that the viewing angle of the wide viewing angle projection screen 1 in the left-right direction is larger.

It should be noted that, the second gradually-approaching segment 11121 and the second gradually-departing segment 11122 are not provided for a specific light-transmitting protrusion 111 in the case of the second curved segment 1112, and in the whole wide-angle projection screen 1, the second gradually-approaching segment 11121 and the second gradually-departing segment 11122 may be provided for the second curved segments 1112 corresponding to all light-transmitting protrusions 111 according to the above rule, or the second gradually-approaching segment 11121 and the second gradually-departing segment 11122 may be provided for the second curved segments 1112 corresponding to part of the light-transmitting protrusions 111 according to the above rule.

Of course, in some embodiments, it is also possible to provide the second curvilinear segment 1112 with only the second asymptotic segment 11121, or only the second asymptotic segment 11122, and the same may be used.

The wide viewing angle projection screen 1 requires a larger enlargement of the viewing angle in the first horizontal direction than in the up-down direction during use. Based on this, in some embodiments, the maximum dimension of the light-transmitting protrusion 111 in the up-down direction is set larger than the maximum dimension of the light-transmitting protrusion 111 in the first horizontal direction.

Therefore, more light-transmitting protrusions 111 can be arranged on the wide-viewing-angle projection screen 1 along the first horizontal direction, so that the line type of the surface of the wide-viewing-angle projection screen 1 in the first horizontal direction is more complex, and the viewing angle of the wide-viewing-angle projection screen 1 in the first horizontal direction is more obviously expanded.

For example, the size of the light-transmitting protrusion 111 in the first horizontal direction may range from 5 to 50 μm, and the size of the light-transmitting protrusion 111 in the up-down direction is set to be 2 to 10 times the size of the light-transmitting protrusion 111 in the first horizontal direction. In addition, the size of the light-transmitting protrusion 111 in the thickness direction of the wide-angle projection screen 1 may be set to be 10 μm or less.

How the various film layers of the wide viewing angle projection screen 1 are formed will be described below. The support layer 12 serves as a support base for the wide-angle projection screen 1, and also serves as a base for the fresnel lens layer 13 and the surface layer 11 during fabrication.

The fresnel lens layer 13 may be made of UV glue curing, and the fresnel lens layer 13 may be curled because the UV glue has elasticity. Referring to fig. 3, a side of the fresnel lens layer 13 away from the support layer 12 has a plurality of reflection surfaces 131 arranged in an up-down direction, each reflection surface 131 is a plane inclined from top to bottom along the front view direction, an included angle θ between each reflection surface 131 and a horizontal plane gradually increases from top to bottom, and the included angle θ is within a range of 5 ° to 85 °.

When preparation fresnel lens layer 13, keep away from superficial layer 11 with the UV coating on the surface at supporting layer 12, then carry out the impression to fresnel lens layer 13 with special mould for fresnel lens layer 13 shaping, reuse UV light source lamp solidifies UV to glue, then the preparation on fresnel lens layer 13 can be accomplished in the drawing of patterns. Of course, in other embodiments, the fresnel lens layer 13 may be made of a heat-curable glue, and the same may be used.

After the fresnel lens layer 13 is manufactured, a reflective layer 14 is coated on each reflective surface 131, and the reflective material in the reflective layer 14 can be aluminum; of course, in other embodiments, the reflective material in the reflective layer 14 may be silver, or a combination of silver and aluminum may be used.

Taking aluminum as an example of the reflective material, aluminum is dissolved in a solvent to form an aluminum powder solvent, and then sprayed on the reflective surface 131. Referring to fig. 13, fig. 13 is a schematic structural diagram of a fresnel lens layer 13 and a reflective layer 14 in a wide-viewing angle projection screen 1 in a projection system 100 according to some embodiments of the present disclosure. In some embodiments, to improve the gain of the wide viewing angle projection screen 1, the reflective layer 14 is a powdered aluminum reflective layer, and the diameter of the aluminum particles in the powdered aluminum reflective layer ranges from 5 μm to 20 μm. 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 wide-viewing-angle projection screen 1 according to the arrangement of the reflection surface 131 on the fresnel lens layer 13, and the light is not randomly reflected around, so that the gain of the wide-viewing-angle projection screen 1 is high. In addition, because the diameter of the aluminum particles is small, when the reflective surface 131 is covered, the mutual interference among the aluminum particles is small, and the thickness of the reflective layer 14 can be made thin under the condition that the requirement of covering the reflective surface 131 on the whole surface is met; the thinner the reflective layer 14 is, the less aluminum is consumed as a reflective material, which can save cost.

Of course, referring to fig. 14, fig. 14 is a schematic structural diagram of the fresnel lens layer 13 and the reflective layer 14 in the wide-viewing angle projection screen 1 in the projection system 100 according to other embodiments of the present disclosure. In other embodiments, the reflective layer 14 is an aluminum reflective layer, and the aluminum particles in the aluminum reflective layer are scaly aluminum powder. The ratio of the diameter to the thickness of the scaly aluminum powder was in the range of (40:1) to (100:1), and it was found that the ratio of the diameter to the thickness of the scaly aluminum powder was large. The aluminum particles in the aluminum reflective layer of the wide-viewing-angle projection screen 1 are made of scale-shaped aluminum powder, and the scale-shaped aluminum powder has a large diameter-thickness ratio, so that the scale-shaped aluminum powder has a strong binding capacity with a binding agent (such as a solvent in an aluminum powder solution) in the aluminum reflective layer, and the probability of falling off of the aluminum particles in the aluminum reflective layer can be reduced.

After the reflective layer 14 is formed, it is generally a metal layer coated on the fresnel lens layer 13, and the thickness is very thin, so that the whole reflective layer 14 can be curled, and the fresnel lens layer 13 can also be curled, so that after the reflective layer 14 is coated on the fresnel lens layer 13, the whole of the fresnel lens layer 13 and the reflective layer 14 still has flexibility, and can be curled.

The surface layer 11 is disposed to prevent the surface of the wide viewing angle projection screen 1 from being scratched, thereby affecting the display effect of the wide viewing angle projection screen 1. The surface layer 11 is made of a flexible material. As an example, the surface layer 11 may be made of UV glue cured, which enables the surface layer 11 to be curled because the UV glue has elasticity.

When the surface layer 11 is manufactured, the UV glue is coated on the surface of the support layer 12 away from the fresnel lens layer 13, and then the UV glue is cured by using a UV light source lamp, so that the surface layer 11 can be manufactured. Of course, in other embodiments, the surface layer 11 may be heat-cured on the support layer 12 by a heat-curing glue, and the same may be used.

In order to form the light-transmitting protrusions 111 on the surface of the surface layer 11 away from the fresnel lens layer 13, in the process of molding the surface layer 11, a special mold is required to be used to imprint the surface layer 11, thereby forming the light-transmitting protrusions 111 on the surface layer 11.

As can be seen from the foregoing, the surface layer 11 and the fresnel lens layer 13 may be made of flexible material such as UV glue or thermal curing glue, and the reflective layer 14 and the fresnel lens layer 13 may also be curled. Whereas for the support layer 12, the support layer 12 may be a PU (Polyurethane) flexible support layer made of 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 supporting layer of PU for supporting layer 12 has the flexibility and can realize curling.

Of course, in other embodiments, the support layer 12 may be made of other flexible materials, for example, TPU (Thermoplastic polyurethane elastomers) materials may be used to make the flexible support layer, which has elasticity and can be crimped, and TPU may be used to make the flexible support layer, which also can make the support layer 12 flexible and can be crimped. Alternatively, the supporting layer 12 may be made of flexible materials such as PET (Polyethylene terephthalate), SBC (styrene Block Copolymers), PVC (Polyvinyl chloride), PE (Polyethylene), etc., and all of them can make the supporting layer 12 flexible and rollable.

Based on this, the surface layer 11, the support layer 12, the fresnel lens layer 13, and the reflection layer 14 can be curled, so the wide-viewing angle projection screen 1 can be curled, and further the wide-viewing angle projection screen 1 is very convenient in transportation, installation, and use.

Of course, in other embodiments, the supporting layer 12 may be made of a hard material such as PP (polypropylene), MS (methyl methacrylate-styrene copolymer), etc., and may also be used.

In order to make the viewing angle of the wide viewing angle projection screen 1 wider, referring to fig. 15, fig. 15 is an expanded view of the wide viewing angle projection screen 1 in the projection system 100 according to some embodiments of the present disclosure. In some embodiments, the light-transmissive protrusions 111 are arranged in a plurality of rows and a plurality of columns, each row having a plurality of light-transmissive protrusions 111, and each column having a plurality of light-transmissive protrusions 111.

Based on this, the number of the light-transmitting protrusions 111 on the wide-angle projection screen 1 is large, the complexity of the line type of the surface of the wide-angle projection screen 1 is improved, and the view angle of the wide-angle projection screen 1 is enlarged more obviously.

Of course, in other embodiments, the light-transmitting protrusions 111 may be arranged in only one row, and the row may be provided with a plurality of light-transmitting protrusions 111, that is, only one light-transmitting protrusion 111 per row, and the same may be used.

To simplify the special mold for making the surface layer 11, referring to fig. 15, in some embodiments, the light-transmissive protrusions 111 are arranged in a rectangular array. That is, the number of the light-transmitting protrusions 111 in each row is the same, and the number of the light-transmitting protrusions 111 in each column is also the same.

Therefore, the regularity of the transparent protrusions 111 on the surface layer 11 is high, and the structural complexity of the special mold can be reduced, so that the design cost and the manufacturing cost of the special mold are reduced.

In some embodiments, the shape and size of each light-transmitting protrusion 111 may be the same, which may further reduce the manufacturing cost and design cost of the dedicated mold. Of course, the shape and size of part of the light-transmitting protrusions 111 may be different, or the shape and size of all the light-transmitting protrusions 111 may be different, which is not limited in this application.

In the wide-angle projection screen 1 shown in fig. 15, in each row of the light-transmitting protrusions 111, there is a space between adjacent light-transmitting protrusions 111, and in each row of the light-transmitting protrusions 111, there is a space between adjacent light-transmitting protrusions 111. In other embodiments, referring to fig. 16, fig. 16 is an expanded schematic view of a wide-viewing angle projection screen 1 in a projection system 100 according to still other embodiments of the present disclosure. In still other embodiments, in each row of the light-transmitting protrusions 111, adjacent light-transmitting protrusions 111 may be directly connected to each other, i.e., the adjacent light-transmitting protrusions 111 are attached together; similarly, in each row of the light-transmitting protrusions 111, the adjacent light-transmitting protrusions 111 may be directly connected to each other, that is, the adjacent light-transmitting protrusions 111 are attached together, and the same may be used. Referring to fig. 3, the supporting layer 12 of the wide viewing angle projection screen 1 shown in fig. 3 is a single film layer. Referring to fig. 17, fig. 17 is a schematic structural diagram of a wide-viewing angle projection screen 1 in a projection system 100 according to still other embodiments of the present disclosure. In still other embodiments, the support layer 12 may also include two support base layers 121, and the two support base layers 121 are disposed adjacent to each other. In this case, the surface layer 11 is formed on the side of one of the support base layers 121, and the fresnel lens layer 13 is formed on the side of the other support base layer 121.

To further improve the viewing angle of the wide viewing angle projection screen 1. Diffusion particles are distributed in at least one of the surface layer 11, the support layer 12, and the fresnel lens layer 13. For example, referring to fig. 17, the diffusion particles 15 are distributed in the support layer 12 and located in the support base layer 121 close to the fresnel lens layer 13, so that the support base layer 121 close to the fresnel lens layer 13 can also be regarded as a diffusion layer of the wide-viewing angle projection screen 1. The diffusion particles 15 may be made of PMMA.

Of course, in other embodiments, the diffusing particles 15 may be disposed in the supporting base layer 121 adjacent to the surface layer 11, or disposed in the fresnel lens layer 13. Of course, the diffusion particles 15 may be provided in a plurality of film layers, and the same may be used.

The diffusion particles 15 are disposed such that light is diffused by the diffusion particles 15 when passing through the wide viewing angle projection screen 1, thereby making it possible to improve the viewing angle of the wide viewing angle projection screen 1.

In some embodiments, to improve the contrast of the wide viewing angle projection screen 1, a dark dye is distributed in one of the surface layer 11, the support layer 12, the fresnel lens layer 13, and the reflective layer 14. The dark color dye is generally an organic dye, and azo dyes, phthalocyanine dyes and the like can be selected. Illustratively, the dark dye is distributed in the support layer 12 and distributed in the support base layer 121 near the surface layer 11, so that the support base layer 121 near the surface layer 11 also corresponds to a coloring layer forming the wide-angle projection screen 1.

Of course, in other embodiments, dark dyes may be distributed in the support base layer 121 adjacent to the fresnel lens layer 13, or disposed in the surface layer 11, or disposed in the fresnel lens layer 13, or disposed in the reflective layer 14.

When the dark dye is disposed in the reflective layer 14, on the basis of improving the contrast of the wide-viewing angle projection screen 1, the light is only partially absorbed by the dark dye when reflected at the reflective layer 14, so that the energy loss is small, and the brightness of the wide-viewing angle projection screen 1 is high when in use. In addition, the dark dye enables the aluminum powder to slightly agglomerate in the solvent (the aluminum powder can be dissolved in the solvent during the manufacturing of the reflective layer 14 and then sprayed on the reflective surface 131 of the fresnel lens layer 13), so that the flatness of the reflective layer 14 is slightly reduced, and the light can be scattered to a greater extent when the light irradiates on the reflective layer 14, so that 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 13 is made of UV glue, and the UV glue is a high molecular polymer, so that the dark dye and the Fresnel lens layer 13 have strong bonding force, and the reflective layer 14 is integrally attached to the Fresnel lens layer 13 with high attachment fastness.

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

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 wide-viewing angle projection screen is characterized by comprising a surface layer, a supporting layer, a Fresnel lens layer and a reflecting layer which are sequentially stacked; the surface of the surface layer, which is far away from the Fresnel lens layer, is provided with a plurality of light-transmitting bulges, the intersection lines of the surfaces of the light-transmitting bulges and a plurality of set vertical planes are provided with first curve sections, and the set vertical planes are perpendicular to the wide-view projection screen.

2. The wide-angle projection screen of claim 1, wherein the first curved segment comprises a first gradually-approaching segment extending from top to bottom closer to the fresnel lens layer and a first gradually-distant segment extending from top to bottom further from the fresnel lens layer; the first gradually-approaching section is provided with a plurality of first gradually-approaching sections, and/or the first gradually-distant section is provided with a plurality of first gradually-distant sections.

3. The wide-angle projection screen of claim 1 or 2, wherein the intersection of the surface of the light-transmissive protrusion and a plurality of set horizontal planes has a second curve segment, and the set horizontal planes are perpendicular to the wide-angle projection screen.

4. The wide-angle projection screen of claim 3, wherein the wide-angle projection screen comprises a first end and a second end in a first horizontal direction, the first horizontal direction being perpendicular to a thickness direction of the wide-angle projection screen; the second curved section comprises a second asymptotic section extending from the first end to the second end and extending close to the Fresnel lens layer and a second asymptotic section extending from the first end to the second end and extending away from the Fresnel lens layer; the second asymptotic section is provided with a plurality of sections, and/or the second distancing section is provided with a plurality of sections.

5. The wide-angle projection screen of claim 4, wherein a maximum dimension of the transparent protrusion in the up-down direction is larger than a maximum dimension of the transparent protrusion in the first horizontal direction.

6. The wide-angle projection screen of claim 1 or 2, wherein the light-transmissive protrusions are arranged in a plurality of rows and a plurality of columns, each row having a plurality of the light-transmissive protrusions, and each column having a plurality of the light-transmissive protrusions.

7. The wide-angle projection screen of claim 6, wherein the light-transmissive protrusions are arranged in a rectangular array.

8. The wide-angle projection screen of claim 1 or 2, wherein diffusing particles are distributed in at least one of the surface layer, the support layer, and the fresnel lens layer.

9. The wide-angle projection screen of claim 1 or 2, wherein a dark dye is distributed in one of the surface layer, the support layer, the fresnel lens layer, and the reflective layer.

10. A projection system comprising a projector and a wide view projection screen according to any of claims 1-9.