CN215264365U - Projection diaphragm, projection screen and projection system - Google Patents

Abstract

The application discloses projection diaphragm, projection screen and projection system relates to projection screen technical field for solve the comparatively complicated problem of projection screen's among the prior art structure. The projection membrane comprises a plurality of membrane layers, wherein the membrane layers comprise a surface layer, a supporting layer, a Fresnel lens layer and a reflecting layer which are sequentially stacked. The projection film has a display area for displaying images and a fixing area for fixedly connecting with the frame. The fixed area is located at the edge of the projection film, and the fixed area is formed by extending at least one support layer in the plurality of film layers. The projection film is applied to a projection screen and used for displaying pictures, images and the like.

Description

Projection diaphragm, projection screen and projection system

Technical Field

The application relates to the technical field of projection screens, in particular to a projection film, a 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. The projection screen may include a projection membrane, a synthetic cloth, and a bezel.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a projection film in a projection screen with a fresnel microstructure in the prior art. The projection film shown in fig. 1 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 membrane. 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 film. 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 film in 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 prior art, the whole breadth of the projection film can display images, so the projection film is generally bonded and fixed on a synthetic cloth (not shown in the figure) firstly, the synthetic cloth has a film area and a mounting area arranged on the peripheral side of the film area, the projection film is fixed in the film area of the synthetic cloth, the synthetic cloth is fixed on a frame (not shown in the figure) through the mounting area, and the frame is used for fixing the projection screen on a wall.

In the projection screen, the projection film needs to be fixed on the frame through the synthetic cloth, so that the structure of the projection screen is complex.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a projection diaphragm, a projection screen and a projection system, which are used for solving the problem that the structure of the projection screen in the prior art is complex.

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

in a first aspect, some embodiments of the present disclosure provide a projection film, which includes a plurality of film layers, including a surface layer, a support layer, a fresnel lens layer, and a reflective layer, which are sequentially stacked. The projection film has a display area for displaying images and a fixing area for fixedly connecting with the frame. The fixed area is located at the edge of the projection film, and the fixed area is formed by extending at least one support layer in the plurality of film layers.

The projection membrane comprises a fixing area which can be fixedly connected with the frame, so that the projection membrane can be directly fixed on the frame without being fixed on the frame through synthetic cloth, and the structural complexity of a projection screen comprising the projection membrane is reduced. The supporting layer is used as a supporting base and a base of the whole projection membrane and has certain supporting strength, so that the fixing area is arranged on the supporting layer, and the fixing stability of the projection membrane and the frame can be ensured.

In a possible implementation manner of the first aspect, the fixing region is formed by a film layer located on a side of the fresnel lens layer away from the reflection layer, and the fresnel lens layer is located in the display region. Therefore, the Fresnel lens layer only needs to cover the display area, and the size of the die for manufacturing the Fresnel lens layer can be reduced, so that the manufacturing cost of the die for manufacturing the Fresnel lens layer is reduced.

In one possible implementation manner of the first aspect, the fixed areas are arranged on two opposite sides of the projection membrane; the surface layer, the support layer and the fresnel lens layer are made of flexible material so that the projection membrane can be rolled. The reflective layer is typically a thin metal layer applied over the fresnel lens layer and is therefore flexible, so that the entire projection membrane can be rolled in the case of a surface layer, support layer and fresnel lens layer made of flexible material. The fixed areas are arranged on two opposite sides of the projection membrane, and the frame can be of two independent structures and is fixedly connected with the two fixed areas of the projection membrane respectively, so that the curling of the whole projection screen is not affected. The rollable projection screen is convenient to transport, install and use.

In a possible implementation manner of the first aspect, the fixing area is provided with a mounting hole, the mounting hole is used for penetrating through a connecting piece, and the connecting piece is used for being fixedly connected with the projection membrane and the frame.

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 projection membrane can be improved, a coloring layer does not need to be specially arranged, the number of layers of the projection membrane can be reduced, the thickness of the projection membrane is reduced, and the cost is reduced; moreover, if the projection film can be curled, the thickness of the projection film is reduced, and the curling performance of the projection film 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 projection membrane, and the light can be 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 projection membrane 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 color dye is generally organic dye, 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 projection film 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 plurality of film layers further include a substrate layer; the substrate layer is arranged between the surface layer and the support layer, or the substrate layer is arranged between the support layer and the Fresnel lens layer. The substrate layer also can regard as the support basis of whole projection diaphragm, and the projection diaphragm includes two support retes of supporting layer and substrate layer, can improve the roughness when this projection diaphragm uses.

In a possible implementation manner of the first aspect, the plurality of film layers further include a coloring layer, and the coloring layer is disposed between the substrate layer and the support layer; the colored layer includes a colored base layer and a dark dye disposed in the colored base layer. The contrast of the projection film can be improved by providing the coloring layer. Simultaneously, the dyed layer is located between substrate layer and the supporting layer, if the dyed layer is glued by the UV that has the dark colour dyestuff to form after the solidification (promptly the coloured substrate layer is glued for the UV), then the UV glues and can be in the same place substrate layer and supporting layer bonding in the curing process, need not make the dyed layer specially earlier, then it is fixed with dyed layer and substrate layer and supporting layer bonding through glue respectively to divide, complexity when having reduced this projection diaphragm preparation.

In one possible implementation of the first aspect, the surface layer is provided with diffusing particles therein. By the arrangement, the diffusion effect of light rays in the projection film can be improved, and the viewing angle of the projection film is further improved.

In a second aspect, some embodiments of the present application provide a projection screen, where the projection screen includes a frame and a projection film according to any of the above technical solutions, and the projection film is fixedly connected to the frame through a fixing area.

Because the projection screen provided by the embodiment of the application comprises the projection membrane in any technical scheme, the two can solve the same technical problem and achieve the same technical effect.

In a third aspect, some embodiments of the present application provide a projection system, which includes a projector and a projection screen according to any of the above-mentioned technical solutions.

Because the projection system provided by the embodiment of the application comprises the projection screen in any technical scheme, the two projection screens 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 film in a projection screen with Fresnel microstructure in 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 of a projection screen in a projection system according to some embodiments of the present disclosure;

FIG. 4 is a schematic diagram of a projection film of a projection screen in a projection system according to some embodiments of the present disclosure;

FIG. 5 is an expanded schematic view of a projection membrane in a projection screen in a projection system provided in some embodiments of the present application;

FIG. 6 is an expanded schematic view of a projection membrane in a projection screen in a projection system according to further embodiments of the present application;

FIG. 7 is a schematic diagram of a projection film in a projection screen of a projection system according to still other embodiments of the present application;

fig. 8 is a schematic structural diagram of a projection film in a projection screen of 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 projection screen; 11-a frame; 12-a projection membrane; 121-a surface layer; 122-a support layer; 123-a Fresnel lens layer; 1231-a reflective surface; 124-a reflective layer; 125-display area; 126-a fixation zone; 1261-mounting holes; 127-a substrate layer; 128-glue layer; 129-a coloured layer; 130-diffusion particles; 2-a projector; 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 projection screen 1 and a projector 2. For the convenience of describing the projection system 100, the present application describes a state in which the projection screen 1 is unfolded in a vertical plane as an example, and defines a direction in which the viewer 3 looks at the projection screen 1 as a front view direction.

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

In the related art, a projection screen generally includes a projection film, a synthetic fabric, and a frame. The whole breadth of the projection film can display images, so the projection film is generally bonded and fixed on the synthetic cloth, the synthetic cloth is provided with a film area and an installation area arranged on the peripheral side of the film area, the projection film is fixed in the film area of the synthetic cloth, the synthetic cloth is fixed on a frame through the installation area, and the frame is used for fixing the projection screen on a wall. In the projection screen in the related art, the projection film needs to be fixed on the frame through the synthetic cloth, which makes the structure of the projection screen more complex.

Based on this, referring to fig. 3, fig. 3 is a schematic structural diagram of a projection screen 1 in a projection system 100 according to some embodiments of the present application, where the projection screen 1 includes a frame 11 and a projection film 12. Referring to fig. 4, fig. 4 is a schematic structural diagram of a projection film 12 of a projection screen 1 in a projection system 100 according to some embodiments of the present disclosure. The projection film 12 includes a plurality of film layers including a surface layer 121, a support layer 122, a fresnel lens layer 123, and a reflective layer 124, which are sequentially stacked. The support layer 122 has a certain support strength and can serve as a support base for the whole projection film 12.

Referring to fig. 3, the projection film 12 has a display area 125 for displaying an image and a fixing area 126 for fixing connection with the bezel 11. That is, the projection film 12 is fixedly connected to the frame 11 through the fixing area 126, and displays an image through the display area 125.

Referring to fig. 4, a fixed area 126 is located at the edge of the projection membrane 12, and the fixed area 126 is formed by extending at least the support layer 122 of the plurality of film layers. Specifically, at least a portion of the edges of at least the support layer 122 of the plurality of film layers form the anchor region 126, and the remainder of the film layers form a portion of the display region 125. The fixing area 126 in the projection membrane 12 shown in fig. 4 is formed by extending the surface layer 121 and the support layer 122.

Based on this, the projection film 12 can be fixedly connected to the frame 11 through the fixing area 126, so that the projection film 12 can be directly fixed on the frame 11 without being fixed on the frame 11 through a synthetic cloth, thereby reducing the structural complexity of the projection screen 1.

The fixing area 126 in the projection membrane 12 shown in fig. 4 is formed by extending the surface layer 121 and the support layer 122. In other embodiments, the fixing area 126 in the projection membrane 12 may also be formed by extending only the support layer 122, or by extending the surface layer 121, the support layer 122, and the fresnel lens layer 123, or by extending the surface layer 121, the support layer 122, the fresnel lens layer 123, and the reflection layer 124, or by extending the support layer 122 and the fresnel lens layer 123, or by extending the support layer 122, the fresnel lens layer 123, and the reflection layer 124, which is not limited in this application.

How each film layer is formed will be described below. The support layer 122 serves as a support base for the projection membrane 12 and also as a base for the fresnel lens layer 123 and the surface layer 121 during fabrication.

The fresnel lens layer 123 may be made of UV glue curing, and since the UV glue has elasticity, the fresnel lens layer 123 may be curled. Referring to fig. 4, a side of the fresnel lens layer 123 far from the support layer 122 has a plurality of reflection surfaces 1231 arranged in an up-down direction, each reflection surface 1231 is a plane inclined from top to bottom along the front view direction, an included angle θ between each reflection surface 1231 and the horizontal plane gradually increases from top to bottom, and the included angle θ is set within a range of 5 ° to 85 °.

When preparation fresnel lens layer 123, with the coating of UV glue on the surface that superficial layer 121 was kept away from to supporting layer 122, then carry out the impression to fresnel lens layer 123 with special mould for fresnel lens layer 123 shaping, reuse UV light source lamp solidifies UV glue, then the preparation of fresnel lens layer 123 can be accomplished in the drawing of patterns. Of course, in other embodiments, the fresnel lens layer 123 may be made of heat-curable glue, and the same may be used.

After the fresnel lens layer 123 is manufactured, a reflective layer 124 is coated on each reflective surface 1231, and the reflective material in the reflective layer 124 may be aluminum; of course, in other embodiments, the reflective material in the reflective layer 124 may also be silver, or a combination of silver and aluminum may also be used.

Taking the example of selecting 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 projection film 12. In this way, since the diameter of the aluminum particles is small, the directivity is not obvious, and most of the light emitted by the projector 2 can be reflected out of the projection membrane 12 in a directional manner according to the arrangement of the reflection surface 1231 on the fresnel lens layer 123 without causing the light to be reflected around randomly, so that the gain of the projection membrane 12 is high. In addition, because the diameter of the aluminum particles is small, when the reflective surface 1231 is covered, the mutual interference between the aluminum particles is small, and the thickness of the reflective layer 124 can be made thin under the condition that the requirement of covering the reflective surface 1231 completely is met; the thinner the reflective layer 124 is, the less aluminum is consumed, which can save the 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 bonding ability and is not easily detached when sprayed on the reflection surface 1231.

After the reflective layer 124 is formed, it is generally a metal layer coated on the fresnel lens layer 123, and the thickness is very thin, so that the entire reflective layer 124 can be curled, and the fresnel lens layer 123 can also be curled, so that after the reflective layer 124 is coated on the fresnel lens layer 123, the fresnel lens layer 123 and the reflective layer 124 are still flexible, and can be curled.

The surface layer 121 is provided to prevent the surface of the projection film 12 from being scratched, thereby affecting the display effect of the projection film 12. The surface layer 121 is made of a flexible material. As an example, the surface layer 121 may be made of UV glue cured, so that the surface layer 121 can be curled because the UV glue has elasticity.

When the surface layer 121 is manufactured, the UV glue is coated on the surface of the support layer 122 far away from the fresnel lens layer 123, and then the UV glue is cured by using a UV light source lamp, so that the surface layer 121 can be manufactured. Of course, in other embodiments, the surface layer 121 may be heat cured on the support layer 122 by a heat curing glue, and the same may be used.

As can be seen from the above, the fresnel lens layer 123 needs to use a dedicated mold to form the microstructure on the fresnel lens layer 123, and the larger the size of the mold for manufacturing the fresnel lens layer 123 is, the more difficult the manufacturing becomes, the higher the manufacturing cost of the projection film 12 becomes.

Based on this, in order to reduce the manufacturing cost of the projection film 12, in some embodiments, the fixing region 126 in the projection film 12 is formed by a film layer located on the side of the fresnel lens layer 123 away from the reflective layer 124, and the fresnel lens layer 123 is disposed in the display region 125. That is, the fixing region 126 is formed only by at least one film layer located on a side of the fresnel lens layer 123 remote from the reflection layer 124, and the support layer 122 is further included in the at least one film layer. The fresnel lens layer 123 is only located in the display area 125, so that the area of the fresnel lens layer 123 is small, and further the size of the mold for manufacturing the fresnel lens layer 123 is small, and thus the difficulty in manufacturing the mold for manufacturing the fresnel lens layer 123 is low, and further the manufacturing cost of the projection film 12 is low. The fresnel lens layer 123 shown in fig. 3 is located only within the display area 125 of the projection membrane 12 and covers the entire display area 125.

In the case where the fresnel lens layer 123 is provided only in the display region 125, the number of film layers for forming the fixing region 126 is not limited, and the fixing region 126 may be formed only by the support layer 122, or the fixing region 126 may be formed by the support layer 122 and the surface layer 121 (see fig. 3).

In order to allow the projection membrane 12 to be rolled up, thereby facilitating transport and installation of the projection membrane 12. In some embodiments, the fixed areas 126 are disposed on opposite sides of the projection membrane 12; the surface layer 121, the support layer 122 and the fresnel lens layer 123 are made of flexible materials so that the projection membrane 12 can be rolled.

As can be seen from the foregoing, the surface layer 121 and the fresnel lens layer 123 may be made of flexible material such as UV glue or thermal curing glue, and the reflective layer 124 and the fresnel lens layer 123 may also be curled. While for the support layer 122, the support layer 122 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 122 has the flexibility and can realize curling.

Of course, in other embodiments, the support layer 122 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 curled, and TPU may be used to make the flexible support layer, which also makes the support layer 122 flexible and can be curled. Alternatively, the support layer 122 may be made of a flexible material such as PET (Polyethylene terephthalate), SBC (styrene Block Copolymers), etc., which can make the support layer 122 flexible and crimpable.

Based on this, the surface layer 121, the support layer 122, the fresnel lens layer 123 and the reflective layer 124 can be curled, so that the projection membrane 12 can be curled, and thus the projection membrane 12 is very convenient to transport, install and use.

In the projection membrane 12 shown in fig. 4, the thickness of the support layer 122 may be in the range of 100 μm and 400 μm.

For the above-mentioned fixing regions 126 disposed on two opposite sides of the projection film 12, for example, referring to fig. 5, fig. 5 is an expanded schematic view of the projection film 12 in the projection screen 1 of the projection system 100 according to some embodiments of the present application, and assuming that the projection film 12 is expanded in a plane extending up, down, left, and right, the fixing regions 126 may be disposed on the upper side and the lower side of the projection film 12, so that the frame 11 may be two long structures, and the two long structures are respectively fixedly connected with the two fixing regions 126 (the long structures extend along the left and right directions), and when the projection film 12 needs to be rolled up, the frame 11 does not affect the rolling of the projection film 12.

Of course, in some other embodiments, referring to fig. 6, fig. 6 is an expanded schematic view of the projection membrane 12 in the projection screen 1 of the projection system 100 according to other embodiments of the present application, and assuming that the projection membrane 12 is expanded in a plane extending up, down, left and right, the fixing areas 126 may also be disposed on the left and right sides of the projection membrane 12. In this way, the frame 11 can be two long-strip structures, and the two long-strip structures are respectively and fixedly connected to the two fixing regions 126 (the long-strip structures extend along the vertical direction), so that when the projection film 12 needs to be rolled up, the frame 11 will not affect the rolling of the projection film 12.

Of course, in other embodiments, the entire edge of the projection membrane 12 may be provided as the fixed area 126, and the same may be used.

Referring to fig. 5 and 6, in some embodiments, the fixing portion 126 is provided with a mounting hole 1261, the mounting hole 1261 penetrates through the fixing portion 126, and the mounting hole 1261 is used for passing through a connecting member (not shown) which is used for fixedly connecting with the projection membrane 12 and the frame 11.

Illustratively, referring to fig. 3, the connecting members may be screws, and the frame 11 is two elongated plates. When the projection screen 1 is assembled, the strip plate is attached to the back of the projection membrane 12, then the fixing region 126 is turned over and part of the fixing region 126 is attached to the back of the strip plate, the mounting hole 1261 in the fixing region 126 is turned over to the back of the strip plate, a threaded hole is formed in the strip plate corresponding to the mounting hole 1261, then a screw penetrates through the mounting hole 1261 and is screwed into the threaded hole in the strip plate, the fixing region 126 is pressed on the strip plate, and therefore the fixing connection of the fixing region 126 and the frame 11 is achieved. The rear surface of the projection film 12 and the rear surface of the strip plate are both the sides facing away from the viewer 3 when the projection screen 1 is in use.

Of course, in other embodiments, the fixing portion 126 may be fixedly connected to the frame 11 by other means, such as by being fixedly connected to the frame 11 by adhesion, in which case the fixing portion 126 does not need to be provided with the mounting hole 1261. Alternatively, the frame 11 may have clamps, and when the projection screen 1 is assembled, the clamps are used to clamp the fixing region 126 of the projection membrane 12, so that the fixing region 126 and the frame 11 can be fixedly connected.

To improve the contrast of the projection membrane 12, in some embodiments, a dark dye is distributed in one of the surface layer 121, the support layer 122, the fresnel lens layer 123, and the reflective layer 124. In the projection membrane 12 shown in fig. 4, the dark dye is disposed in the support layer 122. The dark color dye is generally an organic dye, and azo dyes, phthalocyanine dyes and the like can be selected. The dark dye is provided in one of the surface layer 121, the support layer 122, the fresnel lens layer 123, and the reflective layer 124, so that a separate colored layer is not provided, the number of layers of the projection film 12 can be reduced, the thickness of the projection film 12 can be reduced, and the cost can be reduced. Further, in the case where the projection film 12 can be curled, the thickness of the projection film 12 is reduced, and the curling performance of the projection film 12 can be improved.

When a dark dye is disposed in the reflective layer 124, on the basis of improving the contrast of the projection film 12, the light is only partially absorbed by the dark dye when reflected at the reflective layer 124, so that the energy loss is small, and the brightness of the projection film 12 is high when in use. In addition, the dark dye enables the aluminum powder to slightly agglomerate in the solvent (when the reflective layer 124 is manufactured, the aluminum powder can be dissolved in the solvent and then sprayed on the reflective surface 1231 of the fresnel lens layer 123), so that the flatness of the reflective layer 124 is slightly reduced, and the light can be scattered to a greater extent when the light irradiates on the reflective layer 124, so that the diffusion degree of the light can be improved. The dark dye is an organic dye, the organic dye can be dissolved in a high molecular polymer and an organic solvent, the fresnel lens layer 123 is made of UV glue, and the UV glue is a high molecular polymer, so that the dark dye and the fresnel lens layer 123 have strong bonding force, and the reflective layer 124 is integrally attached to the fresnel lens layer 123 with high attachment strength.

In some embodiments, to improve the flatness of the projection membrane 12 in use. Referring to fig. 7, fig. 7 is a schematic structural diagram of a projection film 12 in a projection screen 1 of a projection system 100 according to further embodiments of the present application. In still other embodiments, the plurality of film layers further includes a substrate layer 127; the base material layer 127 is provided between the support layer 122 and the fresnel lens layer 123.

The material of the base material layer 127 may be the same as that of the support layer 122. The substrate layer 127 may also serve as a support base for the entire projection film 12, and the projection film 12 includes two support film layers, namely the support layer 122 and the substrate layer 127, so as to improve the flatness of the projection film 12 during use.

When the base material layer 127 is provided and the base material layer 127 is provided between the support layer 122 and the fresnel lens layer 123, the fresnel lens layer 123 is formed on a side surface of the base material layer 127 away from the support layer 122.

The substrate layer 127 and the support layer 122 are bonded and fixed together by a glue layer 128, the glue layer 128 is formed by an optically transparent glue, which may be a UV glue (UV is a shorthand for Ultra-Violet ray, i.e., ultraviolet, and is also called a photosensitive glue, an ultraviolet curing glue, a shadowless glue, a UV light curing glue, etc.), an OCA glue, etc., as long as the substrate layer 127 and the support layer 122 can be bonded together.

In addition, in some embodiments, the substrate layer 127 may also be disposed between the surface layer 121 and the support layer 122, and the same may be used. In this case, the surface layer 121 is formed on the side of the base material layer 127 away from the support layer 122.

In the case of providing the substrate layer 127, in some embodiments, the fixing region 126 may also be formed by the substrate layer 127 and the glue layer 128, that is: the same applies to the support layer 122 forming the fastening region 126, as well as the substrate layer 127 extending to form a portion of the fastening region 126.

In the case of providing the substrate layer 127, in order to improve the contrast of the projection film 12, referring to fig. 8, fig. 8 is a schematic structural diagram of the projection film 12 in the projection screen 1 in the projection system 100 according to some embodiments of the present application. In still other embodiments, the plurality of film layers further includes a coloring layer 129, and the coloring layer 129 is disposed between the substrate layer 127 and the support layer 122; the colored layer 129 includes a colored base layer and a dark dye provided in the colored base layer. Of course, in the case of providing the colored layer 129, it is not necessary to provide a dark color dye in the surface layer 121, the support layer 122, the fresnel lens layer 123, and the reflection layer 124, so that the light energy is not absorbed much and the luminance of the projection film 12 is not lowered.

Similarly, the dark dye in the colored layer 129 is generally an organic dye, and an azo dye, a phthalocyanine dye, or the like can be used. In the case where the projection film 12 needs to be curled, the colored base layer may be made of a flexible material so that the colored layer 129 as a whole has flexibility to enable curling, thereby not affecting the curling performance of the entire projection film 12. For example, the material of the colored base layer may be PET, PU, TPU, SBC, etc., in this case, the colored layer 129 is bonded and fixed to the support layer 122 and the base layer 127 by the adhesive layer 128 after being manufactured. Of course, the material of the colored base layer may also be UV glue, OCA glue or thermosetting glue, in this case, the colored layer 129 may be directly formed on the support layer 122 (or the base layer 127), and then bonded to the base layer 127 (or the support layer 122) through its own adhesive property in the curing process, and does not need to be bonded and fixed to the support layer 122 and the base layer 127 through a special adhesive layer 128.

Of course, in the case that the projection film 12 does not need to be rolled, the colored substrate layer may be supported by a hard material, such as an MS (methyl methacrylate-styrene copolymer) material, and the like.

In the case where the projection film 12 has the coloring layer 129, the coloring layer 129 may be extended together to form the fixing region 126 when the fixing region 126 is formed, and the same can be applied.

In the projection film 12 shown in fig. 8, the thickness of the surface layer 121 may range from 10 to 50 μm, the thickness of the support layer 122 may range from 100-.

In order to increase the light-diffusing effect of the projection membrane 12. Referring to fig. 4, 7 and 8, in some embodiments, diffusion particles 130 are also disposed in the surface layer 121. The diffusion particles 130 may be made of PMMA, so that light can be diffused by the diffusion particles 130 during the process of entering the surface layer 121 and exiting the surface layer 121, thereby improving the viewing angle of the projection film 12.

Of course, in some other embodiments, the diffusion particles 130 may not be disposed in the surface layer 121, and the diffusion particles 130 may be disposed in the support layer 122, the base material layer 127, the coloring layer 129, the adhesive layer 128, and the fresnel lens layer 123, and may be used as well.

Alternatively, the projection film 12 may be provided with a special diffusion layer having a diffusion base layer in which the diffusion particles 130 are distributed.

On the basis of the projection film 12 shown in fig. 4, a diffusion layer may be provided between the support layer 122 and the fresnel lens layer 123, in which case the diffusion layer serves as a base for the fresnel lens layer 123, i.e., the fresnel lens layer 123 is formed on the side of the diffusion layer remote from the support layer 122. A spreading layer may also be arranged between the support layer 122 and the surface layer 121, in which case the spreading layer serves as a base for the surface layer 121, i.e. the surface layer 121 is formed on the surface of the spreading layer remote from the support layer 122.

In the projection film 12 shown in fig. 7, a diffusion layer may be provided between the support layer 122 and the surface layer 121, between the support layer 122 and the base material layer 127, or between the base material layer 127 and the fresnel lens layer 123.

In addition to the projection film 12 shown in fig. 8, a diffusion layer may be provided between the support layer 122 and the surface layer 121, between the support layer 122 and the colored layer 129, between the colored layer 129 and the base layer 127, or between the base layer 127 and the fresnel lens layer 123.

In some embodiments, to achieve ceiling reflection resistance, the surface of surface layer 121 remote from fresnel lens layer 123 is coated with diffusing particles 130. The diffusion particles 130 are coated, so that the haze value of the surface layer 121 far away from the Fresnel lens layer 123 is large, and the phenomenon that light rays are subjected to mirror reflection when the light rays irradiate on the surface of the surface layer 121 far away from the Fresnel lens layer 123 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 surface layer 121 far from the fresnel lens layer 123, the light is diffused by the diffusion particles 130, so that the light is more dispersed, and the viewing angle of the projection film 12 can be further improved.

In order to achieve ceiling reflection resistance, in some embodiments, the haze value of the surface layer 121 directly away from the fresnel lens layer 123 may be set to be 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 layer 121 far from the fresnel lens layer 123 is within this range, the light rays irradiate on the surface of the surface layer 121 far from the fresnel lens layer 123 without mirror reflection, and thus the ceiling reflection resistance can be realized.

The haze value of the surface layer 121 far from the fresnel lens layer 123 is set to be a value in a range of 12% to 20%, and can be realized in at least the following two ways: 1) performing AG treatment (i.e., anti-glare treatment) on the surface of the surface layer 121 away from the fresnel lens layer 123; 2) the surface of the surface layer 121 far from the fresnel lens layer 123 is embossed with a pattern-biting pattern by a mold.

Certainly, in some embodiments, the haze value of the surface layer 121 far from the fresnel lens layer 123 is greater than 20%, so that the ceiling reflection resistance can be realized, and when the haze value is within a range of 12% to 20%, the ceiling reflection resistance effect is good, and the definition of the projection film 12 is good.

In addition, if the ceiling reflection resistance is not considered, in order to obtain higher definition, the surface of the surface layer 121 far from the fresnel lens layer 123 may be set to be a smooth surface, so that the diffusion of light at the surface of the surface layer 121 far from the fresnel lens layer 123 may be reduced, and the definition of the projection film 12 may be further improved.

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

The present application further provides a projection diaphragm, which has the same structure as the projection diaphragm 12 in the projection screen 1 of 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 (10)

1. The projection membrane is characterized by comprising a plurality of membrane layers, wherein the membrane layers comprise a surface layer, a supporting layer, a Fresnel lens layer and a reflecting layer which are sequentially stacked;

the projection film is provided with a display area for displaying images and a fixing area for fixedly connecting with the frame; the fixed area is located at the edge of the projection membrane, and the fixed area is formed by extending at least the support layer in the plurality of membrane layers.

2. The projection film of claim 1, wherein the fixed area is formed by the film layer on a side of the fresnel lens layer remote from the reflective layer, the fresnel lens layer being disposed within the display area.

3. The projection membrane of claim 1 or 2 wherein the fixed regions are disposed on opposite sides of the projection membrane; the surface layer, the support layer and the fresnel lens layer are made of a flexible material so that the projection membrane can be rolled.

4. The projection membrane of claim 1 or 2, wherein the fixing area is provided with a mounting hole for passing through a connecting member for fixedly connecting the projection membrane and the frame.

5. The projection film 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.

6. The projection film of claim 1 or 2, wherein the plurality of film layers further comprises a substrate layer; the substrate layer is arranged between the surface layer and the support layer, or the substrate layer is arranged between the support layer and the Fresnel lens layer.

7. The projection film of claim 6, wherein the plurality of film layers further comprises a colored layer disposed between the substrate layer and the support layer; the colored layer includes a colored base layer and a dark dye disposed in the colored base layer.

8. The projection film of claim 1 or 2, wherein the surface layer has diffusing particles disposed therein.

9. A projection screen comprising a frame and the projection membrane of any of claims 1-8, wherein the projection membrane is fixedly attached to the frame by the fastening region.

10. A projection system comprising a projector and a projection screen as claimed in claim 9.

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