CN113741133A

CN113741133A - Projection screen and projection arrangement can curl

Info

Publication number: CN113741133A
Application number: CN202111136835.6A
Authority: CN
Inventors: 张海鹏; 侯蕊; 王超
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2021-12-03
Anticipated expiration: 2041-09-27
Also published as: CN113741133B

Abstract

The application discloses projection screen and projection arrangement can curl relates to projection display technical field for solve projection screen among the prior art curl and expand the back again, appear the problem of roll warpage easily. The rollable projection screen comprises a functional layer, a Fresnel lens layer and a reflecting layer which are sequentially stacked, and elastic anti-bending strips arranged in the functional layer. The extending direction of the elastic bending-resistant strips and the curling axis of the curlable projection screen form an included angle, and the elastic recovery capability of the elastic bending-resistant strips is higher than that of the functional layer. The rollable projection screen is used for displaying images projected by the projector.

Description

Projection screen and projection arrangement can curl

Technical Field

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

Background

In the field of projection display technology, especially in the field of ultrashort-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.

In the prior art, projection screens are made of flexible materials that can be rolled along a roll axis. The axis of the curl is generally located on one side of the projection screen, that is, the projection screen can be curled along one side of the projection screen as an axis. Therefore, in the transportation process, the occupied space of the projection screen is reduced, and the whole transportation process is more convenient. However, after the projection screen is rolled for a long time and then unfolded, the projection screen is easily curled and warped and is not easy to restore to be flat, which brings poor experience to subsequent installation and watching.

Disclosure of Invention

The application provides a projection screen and projection arrangement that can curl for solve projection screen among the prior art and curl the problem that the warpage appears easily after expanding again.

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

in a first aspect, an embodiment of the present application provides a rollable projection screen, which includes a functional layer, a fresnel lens layer, and a reflective layer, which are sequentially stacked, and an elastic anti-bending strip disposed in the functional layer. The extending direction of the elastic bending-resistant strips and the curling axis of the curlable projection screen form an included angle, and the elastic recovery capability of the elastic bending-resistant strips is higher than that of the functional layer.

The utility model provides a projection screen can curl that this application embodiment provided is provided with elasticity anti-bending strip in the functional layer to the extending direction of elasticity anti-bending strip has the contained angle with the axis of curling of projection screen can curl. Thus, when the rollable projection screen is rolled along the roll axis, the resilient flex bars will also roll with the rollable projection screen. After the curlable projection screen is re-unfolded, because the elastic restoring capacity of the elastic anti-bending strips is higher than that of the functional layer, and the elastic anti-bending strips are positioned in the functional layer, the elastic anti-bending strips can apply elastic restoring force to the functional layer, and further can apply elastic restoring force to the curlable projection screen, the curlable projection screen can tend to be flat under the action of the elastic restoring force, the risk of curling and warping of the curlable projection screen is reduced, and the flatness of the curlable projection screen after being curled and re-unfolded is improved.

In some embodiments, the functional layer comprises a first substrate layer, a second substrate layer, and a tinting diffusion layer between the first substrate layer and the second substrate layer. The elastic bending-resistant strip is positioned in the coloring diffusion layer.

In some embodiments, the elastic bending resistant strip has a dimension less than or equal to the spacing between the first and second substrate layers in a direction perpendicular to the first substrate layer.

In some embodiments, the elastic bend-resistant bars extend at right angles to the axis of the curling of the rollable projection screen.

In some embodiments, the length of the resilient flex bars is equal to the length of the sides of the rollable projection screen perpendicular to the axis of rolling.

In some embodiments, the number of the elastic bending-resistant strips is two, and the two elastic bending-resistant strips are respectively positioned on both sides of the coloring diffusion layer along the extending direction of the curling axis.

In some embodiments, the cross-section of the resilient flex-resistant strip is circular in shape.

In some embodiments, the material of the resilient flex-resistant strip comprises one of a polymer copolymer, a polymer blend, and a shape memory alloy.

In some embodiments, the resilient flex-resistant strip is made of a polymer blend, and the material of the polymer blend includes polyurethane and polyamide.

In some embodiments, the resilient flex-resistant strip is formed by one of injection molding, extrusion molding, injection molding, and compression molding.

In a second aspect, embodiments of the present application provide a projection device comprising a projector and a rollable projection screen according to any of the first aspect.

Since the projection apparatus provided in the embodiment of the present application includes the rollable projection screen in any one of the embodiments, the same technical problem as that of the rollable projection screen can be solved, and the same technical effect can be achieved, which is not described herein again.

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 illustrating a positional relationship between a projector and a rollable projection screen when a projection apparatus provided in an embodiment of the present application is in use;

fig. 2 is a schematic structural diagram of a rollable projection screen according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of an embodiment of the present application showing an elastic bending resistant strip in a color diffusion layer of a functional layer;

FIG. 4 is a schematic plan view of an elastic bending resistant strip provided in the embodiments of the present application, positioned within a functional layer;

FIG. 5 is a schematic structural diagram of a surface layer provided in an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of another surface layer provided in an embodiment of the present application;

FIG. 7 is a schematic structural diagram of yet another surface layer provided in an embodiment of the present application;

FIG. 8 is a perspective view of the surface layer of FIG. 7;

FIG. 9 is a schematic view of the path of light through the surface layer of FIG. 7;

FIG. 10 is a schematic structural diagram of yet another surface layer provided in an embodiment of the present application;

fig. 11 is a schematic structural diagram of a reflective layer according to an embodiment of the present disclosure;

fig. 12 is a schematic structural diagram of another reflective layer provided in this embodiment of the present application.

Reference numerals:

100-a projection device; 1-a rollable projection screen; 11-a surface layer; 111-light transmissive protrusions; 12-a functional layer; 121-a first substrate layer; 122-a second substrate layer; 123-a coloring diffusion layer; 13-a fresnel lens layer; 131-a reflective surface; 14-a reflective layer; 15-elastic bending resistant strips; 16-diffusing 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, "upper", "lower", "front", "vertical", "horizontal", "inner", etc., 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 device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application.

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

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

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be understood in a broad sense, e.g. fixedly connected, detachably connected, or integrally connected. 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 embodiment of the application provides a projection device, which is used for projecting and playing pictures, images and the like.

Referring to fig. 1, the projection device 100 includes a rollable projection screen 1 and a projector 2. For convenience of describing the projection apparatus 100, in the embodiment of the present application, a state when the rollable projection screen 1 is unfolded in the up-down direction is described as an example, and a direction in which the viewer 3 looks at the rollable projection screen 1 is defined as a front view direction.

With continued reference to fig. 1, in use of projection device 100, projector 2 may be positioned in front of and below rollable projection screen 1, with audience member 3 positioned in front of rollable projection screen 1 and looking at rollable projection screen 1. Incident light 21 emitted by the projector 2 is irradiated to the rollable projection screen 1, and the incident light 21 is reflected by the rollable projection screen 1 to finally form emergent light 22 to be irradiated to the audience 3, and images are formed in the rollable projection screen 1.

Therein, the projector 2 comprises a laser, which may be one of a monochromatic laser, a dichroic laser, or a tricolor laser. In general, the wavelength range of the blue laser emitted by the laser is between 430-460nm, the wavelength range of the green laser emitted by the laser is between 500-540nm, and the wavelength range of the red laser emitted by the laser is between 610-650 nm.

The rollable projection screen 1 in the projection device 100 will be further described below.

Referring to fig. 2 and 3, a rollable projection screen 1 provided in an embodiment of the present application includes a surface layer 11, a functional layer 12, a fresnel lens layer 13, and a reflective layer 14, which are sequentially stacked, and an elastic bending resistant strip 15 disposed in the functional layer 12. Wherein, the extending direction of the elastic bending-resistant strip 15 and the curling axis of the curlable projection screen 1 form an included angle, and the elastic recovery capability of the elastic bending-resistant strip 15 is higher than that of the functional layer 12.

The projection screen 1 that can curl that this application embodiment provided is provided with elasticity anti-bending strip 15 in functional layer 12 to the extending direction of elasticity anti-bending strip 15 has the contained angle with the axis of curling of projection screen 1 that can curl. Thus, when the rollable projection screen 1 is rolled along the roll axis, the resilient anti-roll bars 15 will also roll with the rollable projection screen 1. After the rollable projection screen 1 is re-unfolded, because the elastic recovery capability of the elastic anti-bending strip 15 is higher than that of the functional layer 12, and the elastic anti-bending strip 15 is located in the functional layer 12, the elastic anti-bending strip 15 can apply an elastic recovery force to the functional layer 12, and further can apply an elastic recovery force to the rollable projection screen 1, the rollable projection screen 1 can tend to be flat under the action of the elastic recovery force, the risk of the rollable projection screen 1 that is curled and warped is reduced, and the flatness of the rollable projection screen 1 after re-unfolding is improved.

It will be appreciated that the rollable projection screen 1 is generally rectangular. When the projection screen 1 is curled, the curling axis may be located on a long side or a short side of the projection screen 1, and the projection screen 1 may be curled along the long side or the short side of the projection screen as the curling axis. Referring to fig. 4, the rollable projection screen 1 is rolled along one of its short sides, which is parallel to the first direction X, as a rolling axis. In this way, after the rollable projection screen 1 is unrolled again, two sides of the rollable projection screen 1 in the second direction Y are easily curled and warped. Of course, the rollable projection screen 1 may also be rolled along one of its long sides, which is parallel to the second direction Y, as a rolling axis. In this way, after the rollable projection screen 1 is unrolled again, two sides of the rollable projection screen 1 along the first direction X are easily curled and warped.

For the different crimping modes described above, the elastic bending resistant strips 15 can be correspondingly arranged in different ways in the functional layer 12, so that the extension direction of the elastic bending resistant strips 15 always has an angle with the crimping axis. Like this, can curl projection screen when curling, elasticity anti-bending strip 15 also can correspond curls, and when can curl projection screen 1 and expand again, elasticity anti-bending strip 15 can provide the elastic restoring force, and projection screen 1 that can curl can keep better roughness under the effect of this elastic restoring force.

In some embodiments, referring to fig. 3, the functional layer 12 includes a first substrate layer 121, a second substrate layer 122, and a coloring diffusion layer 123 between the first substrate layer 121 and the second substrate layer 122. The elastic bending resistant strips 15 are located within the color diffusion layer 123.

Since the elastic bending-resistant strip 15 is located in the coloring diffusion layer 123, the coloring diffusion layer 123 is located between the first base material layer 121 and the second base material layer 122. Like this, elasticity anti-bending strip 15 can be better play limiting displacement to the first substrate layer 121 and the second substrate layer 122 of both sides, no matter can curl projection screen 1 and carry out clockwise curling or anticlockwise curling along curling the axis, elasticity anti-bending strip 15 is all the same to the holistic anti effect of curling projection screen 1, can curl projection screen 1 and can both keep better roughness after expandeing again. Meanwhile, the elastic bending-resistant strip 15 is located in the coloring diffusion layer 123, and the first base material layer 121 and the second base material layer 122 located on the two sides of the coloring diffusion layer can also play a certain protection role in the elastic bending-resistant strip 15. Of course, the elastic bending-resistant strip 15 may also be located in the first substrate layer 121 or the second substrate layer 122, and also can play a role in keeping a good flatness after the rollable projection screen 1 is unfolded again.

It will be appreciated that the first substrate layer 121 and the second substrate layer 122 in the rollable projection screen 1 are made of flexible materials. For example, the first substrate layer 121 and the second substrate layer 122 may be made of Polyethylene terephthalate (PET). Since PET has flexibility, the first and second base material layers 121 and 122 have flexibility, thereby achieving the curling of the rollable projection screen 1.

Of course, in some other embodiments, the first substrate layer 121 and the second substrate layer 122 may also be made of other flexible materials, for example, the first substrate layer 121 and the second substrate layer 122 may be made of Thermoplastic polyurethane elastomer (TPU) material, and the TPU has elasticity and can realize curling. Alternatively, the first substrate layer 121 and the second substrate layer 122 may also be made of Styrene Block Copolymers (SBC) flexible materials, and both the first substrate layer 121 and the second substrate layer 122 may be flexible and can be curled.

In addition, the first base material layer 121 and the second base material layer 122 are disposed in the rollable projection screen 1 shown in fig. 2, in some other embodiments, the rollable projection screen 1 may also be disposed with a third base material layer or even a fourth base material layer, which may be disposed according to the actual use condition of the rollable projection screen 1.

It is understood that the first substrate layer 121 or the second substrate layer 122 may serve as a base for fabricating the coloring diffusion layer 123. For example, when the coloring diffusion layer 123 is manufactured, a shadowless adhesive (UV), also called a photosensitive adhesive or an Ultraviolet curing adhesive, is directly coated on the surface of the first substrate layer 121 away from the surface layer 11. After coating, the UV glue is cured by a UV light source lamp, and then the coloring diffusion layer 123 is manufactured after demolding. After the coloring diffusion layer 123 is released from the mold, the coloring diffusion layer 123 and the surface of the second base material layer 122 away from the fresnel lens layer 13 may be bonded together by OCA glue. The above-mentioned manufacturing process is similar to the manufacturing process of using the first base material layer 121 as a base to manufacture the coloring diffusion layer 123, and using the second base material layer 122 as a base to manufacture the coloring diffusion layer 123, and will not be further described here.

In the process of manufacturing the coloring diffusion layer 123, the elastic bending-resistant strip 15 may be placed in the coloring diffusion layer 123 when UV glue is coated, and then the UV glue is cured by using a UV light source, thereby achieving an effect of disposing the elastic bending-resistant strip 15 in the coloring diffusion layer 123.

Referring to fig. 2, diffusion particles 16 are further disposed in the color diffusion layer 123, and the diffusion particles 16 are used for diffusing light entering the color diffusion layer 123, so that the light is diffused in different directions. The material of the diffusion particles 16 may be methyl methacrylate (PMMA). The diffusing particles 16 may be added while coating the UV glue and then curing the UV glue using a UV light source.

Additionally, a dark dye is added within the colored diffusing layer 123, which can increase the contrast of the rollable projection screen 1. The dark color dye is generally an organic dye, and azo dyes, phthalocyanine dyes and the like can be selected. The dark dye may be added to other positions, for example, any one of the surface layer 11, the first base material layer 121, the second base material layer 122, and the fresnel lens layer 13, and the same effect can be achieved.

In some embodiments, referring to fig. 3, the dimension of the elastic bending resistant strip 15 in the direction perpendicular to the first substrate layer 121 is less than or equal to the spacing between the first substrate layer 121 and the second substrate layer 122. I.e., the thickness of the elastic bending resistant strips 15 is less than or equal to the thickness of the color diffusion layer 123.

Because the elastic bending-resistant strips 15 are located in the coloring diffusion layer 123, when the thickness of the elastic bending-resistant strips 15 is too large and exceeds the thickness of the coloring diffusion layer 123, a convex portion exists on the surface of the coloring diffusion layer 123, and the smoothness of the surface of the whole rollable projection screen 1 is affected, and the viewing effect of a user is affected. Keeping the thickness of the anti-bending strips 15 less than or equal to the thickness of the coloring diffusion layer 123 can ensure the flatness of the rollable projection screen 1 after being rolled and then unfolded, and can avoid the problem that the surface of the rollable projection screen 1 is raised due to the arrangement of the elastic anti-bending strips 15.

In some embodiments, the elastic bending resistant strips 15 extend at right angles to the axis of crimping. For example, referring to fig. 4, when the rollable projection screen 1 has one of its short sides as the axis of the rolling, the direction of extension of the elastic bending resistant bars 15 is parallel to one of the long sides of the rollable projection screen.

When the rollable projection screen 1 is rolled with a short side of the rollable projection screen as a rolling axis, the elastic bending-resistant strip 15 is also rolled along the extending direction of the elastic bending-resistant strip 15 because the extending direction of the elastic bending-resistant strip 15 is perpendicular to the rolling axis of the rollable projection screen 1. After the projection screen 1 which can be curled is re-unfolded, because the extending direction of the elastic bending-resistant strip 15 and the included angle between the curling axes are right angles, the elastic restoring force of the elastic bending-resistant strip 15 can enable the projection screen 1 which can be curled to tend to be flat better, and the projection screen 1 which can be curled keeps better flatness after being re-unfolded.

Of course, the included angle between the extending direction of the elastic bending-resistant strip 15 and the curling axis of the curlable projection screen 1 may also be an acute angle, which can also improve the flatness of the curlable projection screen 1 after being unfolded again.

Illustratively, the length of the resilient flex bars 15 is equal to the length of the sides of the rollable projection screen 1 perpendicular to the axis of rolling. For example, referring to fig. 4, when the rollable projection screen 1 is rolled with one of its short sides as a rolling axis, the length of the elastic bending resistant bar 15 is equal to the length of the long side of the rollable projection screen 1. Of course, the length of the resilient anti-bending strips 15 may also be smaller than the length of the sides of the rollable projection screen 1 perpendicular to the axis of the rolling.

After the rollable projection screen 1 is rolled and unrolled, the position of the edge of the rollable projection screen 1 is rolled to a relatively large extent in a direction perpendicular to the axis of the rolling. Therefore, when the length of the elastic bending-resistant strip 15 is equal to the length of the side edge perpendicular to the curling axis in the rollable projection screen 1, the curling of the edge position in the rollable projection screen 1 can be better limited, and the rollable projection screen 1 can keep good flatness.

In some embodiments, referring to fig. 3 and 4, the number of resilient bending bars 15 may be two. Two elastic bending-resistant strips 15 are respectively located on both sides of the color diffusion layer 123 in the extending direction of the curling axis. As shown in fig. 4, when the curling is performed with one short side of the rollable projection screen 1 as a curling axis, two elastic bending resistant strips 15 are located on both sides of the color diffusion layer 12 in the first direction X. Based on the above, on the one hand, since the two elastic bending resistant stripes 15 are located on both sides of the colored diffusion layer 123, the influence of the elastic bending resistant stripes 15 on the light can be reduced. On the other hand, the two elastic bending-resistant strips 15 are respectively arranged on the two sides, after the rollable projection screen 1 is rolled and then unfolded, the two elastic bending-resistant strips 15 can provide good elastic restoring force for the rollable projection screen 1, the rollable projection screen 1 is not easy to roll and warp after being unfolded, and the flatness of the rollable projection screen 1 is improved. Of course, an elastic bending resistant strip 15 may be provided in the middle of the color diffusion layer 123 in the extending direction of the curling axis. However, the elastic bending resistant strips 15 are made of a suitable material in consideration of the influence of the elastic bending resistant strips 15 on the light propagation.

Illustratively, as shown in fig. 3, the cross-section of the resilient bending resistant strip 15 may be circular in shape. Of course, the cross section may have other shapes, such as a triangle or a quadrangle.

In practical applications, the elastic bending resistant strip 15 with a circular cross section is more convenient to manufacture and easier to manufacture and mold than other cross-sectional shapes because the elastic bending resistant strip 15 is generally smaller in size.

For example, the thickness of the coloring diffusion layer 123 may be 300um, and the thickness of each of the first and second base material layers 121 and 122 is 250 um. Thus, when the cross-sectional shape of the elastic bending resistant strip 15 is circular, the diameter of the elastic bending resistant strip 15 can be selected between 250um and 300 um. For example, the diameter may be 250um, 275um, or 300 um. The sizes of the color diffusion layer, the first base material layer 121, the second base material layer 122, and the elastic bending resistant strip 15 are merely examples, and may be adjusted according to actual circumstances.

The materials of the polymer copolymer and the polymer blend may include one or more of polyethylene, polypropylene, polyvinyl chloride, polystyrene, ABS, polyamide, polyurethane, cellulose acetate, polycarbonate, polyoxymethylene, polyphenylene oxide, thermoplastic polyester, polyimide, polyphenylene sulfide, and polysulfone.

The materials of the polymer copolymer and the polymer blend are not limited to the above-mentioned materials, and the elastic bending-resistant strips 15 can be made of any materials as long as the formed elastic bending-resistant strips 15 have certain elasticity, can be bent, have certain rigidity, and can limit the curling and warping after the rollable projection screen 1 is rolled and then unrolled.

The memory alloy material may include Au-Cd, Ag-Cd, Cu-Zn-Al, Cu-Zn-Sn, Cu-Zn-Si, Cu-Sn, Cu-Zn-Ga, In-Ti, Au-Cu-Zn, NiAl, Fe-Pt, Ti-Ni-Pd, Ti-Nb, U-Nb, Fe-Mn-Si, and the like. Since the shape memory alloy has good capability of restoring deformation, the shape memory alloy can also be used as a manufacturing material of the elastic bending-resistant strip 15.

Illustratively, the elastic bending resistant strip 15 provided by the embodiment of the present application may be made of a polymer blend, and the material of the polymer blend includes polyurethane and polyamide.

Because the polyurethane has better elasticity, the elastic bending-resistant strips 15 can be ensured to be bent without influencing the curling of the rollable projection screen 1. Meanwhile, the polyamide has certain rigidity, so that the rigidity of the rollable projection screen 1 can be utilized after being rolled and then unfolded, the rollable projection screen is kept in a tensioned and tensed state, and better flatness is kept.

Wherein, the proportion of the polyurethane and the polyamide in the polymer blend can be set according to the actual situation, and the polymer blend is ensured to have certain elasticity and rigidity. Illustratively, the ratio between polyamide and polyurethane may be between (99.5:0.5) and (50:50), for example, the ratio between polyamide and polyurethane may be (99.5:0.5), (75:25), or (50: 50). In the proportion range, the proportion of the polyamide is higher than that of the polyurethane, and the rigidity of the formed polymer blend is higher, so that the curlable projection screen can be kept in a tensioned and tense state well, and the good flatness is kept.

The elastic bending resistant strips 15 may be formed by one of injection molding, extrusion molding, injection molding and compression molding.

In addition to the first base material layer 121 and the second base material layer 122 provided on the rollable projection screen 1, the first base material layer 121 may also serve as a base for producing the surface layer 11, and the second base material layer 122 may serve as a base for producing the fresnel lens layer 13. The surface layer 11 and the fresnel lens layer 13 are produced as follows.

The surface layer 11 may prevent the surface of the rollable projection screen 1 from being scratched. 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.

Referring to fig. 2, in the manufacturing of the surface layer 11, the UV glue is coated on the surface of the first base material layer 121 on the side away from the coloring diffusion layer 123, and then the UV glue is cured by using a UV light source lamp, so that the surface layer 11 is manufactured. Of course, in other embodiments, the surface layer 11 can also be made by heat curing the heat-curable glue on the first substrate layer 121.

Referring to fig. 2, the fresnel lens layer 13 may also be made of UV glue cured, and the fresnel lens layer 13 may be curled because the UV glue has elasticity. One side of the fresnel lens layer 13, which is far away from the second substrate layer 122, is provided with a plurality of reflection surfaces 131 arranged in the up-down direction, each reflection surface 131 is a plane inclined from top to bottom along the front view direction, an included angle theta between each reflection surface 131 and a horizontal plane is gradually increased from top to bottom, and the included angle theta is a value within a range of 5 degrees to 85 degrees, wherein the horizontal plane is a plane perpendicular to the up-down direction.

When preparation fresnel lens layer 13, glue the coating with the UV on the surface that second substrate layer 122 kept away from painted diffusion layer 123, 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 glues, then the preparation of 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 thermosetting glue.

In some embodiments, referring to FIG. 5, diffusion particles 16 may also be disposed in the surface layer 11. In this way, light rays may be diffused by the diffusing particles 16 during the course of entering the surface layer 11 and exiting the surface layer 11, thereby improving the viewing angle of the rollable projection screen 1. The material of the diffusion particles 16 may be PMMA.

Since the light emitted from the projector 2 is specularly reflected when it irradiates the surface of the surface layer 11 far away from the first substrate layer 121, some light is reflected to the ceiling, and an image is formed on the ceiling, which affects the viewing experience of the viewer.

In some embodiments, in order to reduce the proportion of the light rays that are specularly reflected on the surface of the surface layer 11 away from the first substrate layer 121, the haze value of the surface layer 11 on the side away from the first substrate layer 121 is 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. When the haze value of the surface layer 11 far from the first substrate layer 121 is in the range, the light rays irradiate on the surface of the surface layer 11 far from the first substrate layer 121, and the specular reflection cannot occur, so that the ceiling reflection resistance can be realized. Referring to fig. 6, the surface on the left side of the surface layer 11 shown in fig. 6 is the surface of the surface layer 11 away from the first base material layer 121, and the surface is provided with a haze value.

Setting the haze value of the surface layer 11 away from the surface of the first substrate layer 121 can be achieved by at least the following two ways: 1. performing anti-glare treatment (i.e., AG treatment) on the surface of the surface layer 11 away from the first substrate layer 121; 2. the surface of the surface layer 11 far from the first base material layer 121 is embossed with a pattern engaging path by a mold.

Of course, in some embodiments, setting the haze value of the surface layer 11 away from the first substrate layer 121 to be greater than 20% can also reduce the proportion of specular reflection of light at the surface of the surface layer 11 away from the first substrate layer 121.

In addition, in order to obtain higher definition, the surface of the surface layer 11 away from the first base material layer 121 may be provided as a smooth surface. In this way, the diffusion of light at the surface of the surface layer 11 away from the first substrate layer 121 can be reduced, and the definition of the rollable projection screen 1 can be further improved.

In some embodiments, referring to fig. 7 and 8, the surface of the facing layer 11 remote from the first substrate layer 121 is provided with a plurality of light-transmissive protrusions 111.

As an example, the light-transmitting protrusions 111 provided on the surface layer 11 have a linear semi-cylindrical structure, that is, a cross section of the light-transmitting protrusions 111 taken perpendicular to a longitudinal extending direction thereof has a semi-circular shape. The light-transmitting protrusions 111 on the surface layer 11 may be press-molded by a mold when the surface layer 11 is manufactured.

In order to simplify the shape of the die, thereby facilitating the manufacture of the die and reducing the manufacturing cost of the die. The sizes of the semicircular cross sections of the light-transmitting protrusions 111 at the positions in the length extending direction are the same, and the shapes and the sizes of the light-transmitting protrusions 111 on the surface layer 11 are the same.

Illustratively, the light-transmitting protrusions 111 shown in fig. 8 extend in the width direction of the surface layer 11, and are uniformly arranged in the length direction of the surface layer 11. And the light-transmitting protrusions 111 on the surface layer 11 are continuously arranged along the length direction of the surface layer 11, i.e. adjacent light-transmitting protrusions 111 are connected in sequence.

In order to prevent the rollability of the surface layer 11 from being reduced due to the excessively large cross-sectional size of the light-transmitting protrusions 111, the diameter of the semicircular cross-section of the light-transmitting protrusions 111 taken perpendicular to the surface thereof in the longitudinal extension direction is set to a value in the range of 20 μm to 300 μm.

Referring to fig. 9, the dotted lines and arrows in fig. 9 indicate the paths of light rays incident into the air after passing through the surface layer 11. In the process of light outgoing, the light passes through each light-transmitting protrusion 111 and then enters the air, so that refraction occurs, and the light is diffused because the material for manufacturing the surface layer 11 is the UV glue, and the refractive index of the UV glue is inevitably larger than that of the air. And each of the light-transmitting protrusions 111 has a curved surface, so that light is diffused along the length direction of the surface layer 11, the viewing angle of the rollable projection screen 1 in the length direction thereof can be improved by the light-transmitting protrusions 111.

In other embodiments, the length of the light-transmitting protrusions 111 may also extend along other directions, and correspondingly, light may be diffused along another certain set direction after passing through each light-transmitting protrusion 111 in the emitting process, and the set direction is perpendicular to the front view direction and the length extending direction of each light-transmitting protrusion 111, so as to improve the viewing angle of the rollable projection screen 1 in the set direction.

It should be noted that the light-transmitting protrusions 111 are semi-cylindrical structures, and the shape of the light-transmitting protrusions 111 is not limited to be half of a certain cylindrical structure. In some cases, the area of the cross section of the light-transmitting protrusion 111 taken by a plane perpendicular to the lengthwise extension direction thereof may also be larger than the area of the corresponding semicircle or smaller than the area of the corresponding semicircle.

In other embodiments, the light-transmissive protrusions 111 may be protrusions with other shapes, such as a prism-shaped structure, which can also achieve light diffusion.

In some embodiments, referring to fig. 10, on the basis of providing the light-transmitting protrusions 111, the haze value of the surface of the light-transmitting protrusions 111 may be adjusted, and the surface of the light-transmitting protrusions 111 of fig. 10 is subjected to the adjustment of the haze value.

For example, the haze value of the surface of the light-transmitting protrusion 111 may be set to a range of 12% to 20%. For example, the haze value may be set to 12%, 15%, 18%, 20%, or the like. When the haze value of the surface of the light-transmitting projection 111 is within this range, specular reflection of light irradiated on the surface of the light-transmitting projection 111 is unlikely to occur.

In some embodiments, referring to fig. 11 and 12, reflective layer 14 may be coated on reflective surface 131 of fresnel lens layer 13. After the fresnel lens layer 13 is formed, the reflective surfaces 131 are each coated with a reflective layer 14. Wherein, the reflective material of the reflective layer 14 may be aluminum; of course, in other embodiments, the reflective material in the reflective layer 14 may also be silver, or a combination of silver and aluminum.

Taking the example of aluminum as the reflective material, referring to fig. 11, in order to increase the gain of the rollable projection screen 1, powdered aluminum may be selected and coated on the reflective surface 131 by spray printing or vapor deposition. In this way, since the powdered aluminum powder is finer and has less obvious directivity, most of the light emitted by the projector 2 can be reflected out of the rollable projection screen 1 directionally according to the arrangement of the reflection surface 131 on the fresnel lens layer 13, and the light is not reflected around randomly, so that the gain of the rollable projection screen 1 is higher. In addition, when powdered aluminum powder is used as the reflective material, the thickness of the reflective layer 14 can be made thin. The thinner the reflective layer 14 is made, the less consumption of aluminum, which is a reflective material, and cost savings can be achieved.

Of course, referring to fig. 12, when the reflective material of the reflective layer 14 is aluminum, it is also possible to select a scale-like aluminum powder. The scale-shaped aluminum powder is sprayed on the reflecting surface 131 by a spray printing method. Since the radius-thickness ratio of the scaly aluminum powder is large, the aluminum has a strong bonding ability and is not easily detached when sprayed on the reflecting surface 131. Wherein the diameter-thickness ratio of the scale-like aluminum powder can range from (40:1) to (100: 1).

After the reflective layer 14 is formed, it is generally a metal layer coated on the reflective surface 131 of the fresnel lens layer 13, and the thickness is very thin, so that the entire reflective layer 14 can be curled. As described above, since the fresnel lens layer 13 is made of a flexible material and can be rolled, when the reflective layer 14 is coated on the reflective surface 131 of the fresnel lens layer 13, the fresnel lens layer 13 and the reflective layer 14 are flexible as a whole, and can be rolled.

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 rollable projection screen is characterized by comprising a functional layer, a Fresnel lens layer and a reflecting layer which are sequentially stacked, and elastic anti-bending strips arranged in the functional layer; the extending direction of the elastic bending-resistant strips and the curling axis of the curlable projection screen form an included angle, and the elastic recovery capacity of the elastic bending-resistant strips is higher than that of the functional layer.

2. The rollable projection screen of claim 1, wherein the functional layer comprises a first substrate layer, a second substrate layer, and a color diffusion layer between the first substrate layer and the second substrate layer; the elastic bending-resistant strip is positioned in the coloring diffusion layer.

3. The rollable projection screen of claim 2, wherein the elastic flex bars have a dimension less than or equal to a spacing between the first substrate layer and the second substrate layer in a direction perpendicular to the first substrate layer.

4. The rollable projection screen of claim 1, wherein the included angle is a right angle.

5. The rollable projection screen of claim 4, wherein the length of the resilient anti-flex bars is equal to the length of the sides of the rollable projection screen perpendicular to the axis of rolling.

6. The rollable projection screen of claim 4, wherein the number of resilient anti-flex bars is two; and along the extending direction of the curling axis, the two elastic bending-resistant strips are respectively positioned at two sides of the coloring diffusion layer.

7. A rollable projection screen according to any one of claims 1 to 6, wherein the resilient flex bars are circular in cross-section.

8. A rollable projection screen according to any one of claims 1 to 6, wherein the material of the resilient bending bars comprises one of a polymer copolymer, a polymer blend and a shape memory alloy.

9. The rollable projection screen of claim 8, wherein the resilient flex bars are made of the polymer blend, and the polymer blend material comprises polyurethane and polyamide.

10. The rollable projection screen of claim 8, wherein the resilient flex bars are formed by one of injection molding, extrusion molding, injection molding, and compression molding.

11. A projection device comprising a projector and a rollable projection screen according to any one of claims 1 to 10.