Rollable projection screen and manufacturing method thereof

Abstract

A rollable projection screen belongs to the field of projection display and comprises a rollable screen sheet and a supporting structure, the screen sheet comprises an imaging display surface for imaging emergent light of a projector, and the supporting structure is arranged on one surface, far away from the imaging display surface, of the screen sheet; the supporting structure comprises a base layer and a reinforcing layer, the reinforcing layer is arranged on the base layer, and the supporting structure is formed by bending the base layer and the reinforcing layer; the volume change ratio of the base layer material is alpha base, the volume change ratio of the enhancement layer material is alpha increase, and the alpha base and the alpha increase are the same or similar. The problem that after the projection screen is repeatedly curled, the internal deformation of the supporting structure is inconsistent, and consequently the screen surface is uneven is solved, the internal deformation of the supporting structure of the projection screen is relatively consistent, and the flatness of the screen surface after being repeatedly curled is guaranteed. In addition, the invention further discloses a corresponding manufacturing method, and the use stability of the projection screen is improved.

Description

Technical Field

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

[0002] Rollable projection screens, due to their retractable nature, can significantly reduce their size, making them easier to pack, transport, install, and store. However, these projection screens are prone to curling and warping after repeated rolling and unfolding, resulting in distortion of the projected image and affecting viewing quality.

[0003] To address this issue, existing technologies typically incorporate support structures on the non-imaging display surface of the screen to enhance its flatness. However, in actual use, even with this support structure, projection screens can still exhibit uneven surface deformation after prolonged use. The root cause is the inconsistent deformation properties of different materials within the support structure. This results in uneven stress release across various parts after repeated curling, ultimately causing localized deformation of the screen surface.

[0004] The key issue that needs to be solved urgently is: how to optimize the design of the support structure to ensure that it maintains deformation consistency during long-term use, thereby avoiding unevenness on the curtain surface due to uneven stress distribution. Summary of the Invention

[0005] The purpose of this application is to overcome the shortcomings of the existing technology and provide a rollable projection screen, which effectively solves the problem that after the projection screen is repeatedly rolled up, the internal deformation of the supporting structure is inconsistent, resulting in uneven screen surface.

[0006] This application is implemented through the following technical solutions:

[0007] A rollable projection screen includes a rollable screen and a support structure. The screen includes an imaging display surface for imaging light emitted by a projector. The support structure is arranged on a side of the screen away from the imaging display surface. The support structure includes a base layer and a reinforcement layer. The reinforcement layer is arranged on the base layer. The support structure is formed by bending the base layer and the reinforcement layer. The volume change ratio of the base layer material is α. 基 , with the volume change ratio of the reinforcement layer material as α 增 ,α 基 With α 增 The same or similar, the α 基 , α 增 Satisfy the following formula:

[0008] α 基 =ΔV 基 / (V 基 ×ΔT)

[0009] α 增 =ΔV 增 / (V 增 ×ΔT)

[0010] ΔV 基 is the volume change of the base material;

[0011] V 基 is the original volume of the base material;

[0012] ΔV 增 is the volume change of the reinforcement layer material;

[0013] V 增 is the original volume of the reinforcement material;

[0014] ΔT is the temperature change.

[0015] The present application sets the support structure as a multi-layer structure including a base layer and a reinforcement layer, thereby improving the anti-deformation strength of the support structure; by bending the base layer and the reinforcement layer, the anti-deformation strength of the base layer material and the reinforcement layer material is enhanced, thereby obtaining a support structure that can effectively flatten the rollable curtain surface; the volume change ratio α of the base layer material is set to 基 , the volume change ratio α of the reinforcement layer material 增 Setting them to be the same or similar effectively solves the problem of inconsistent deformation of the supporting structure after repeated curling of the projection screen, which causes the screen surface to appear uneven. This makes the internal deformation of the supporting structure of the projection screen relatively consistent, ensuring the flatness of the screen surface after repeated curling.

[0016] Furthermore, α 基 With α 增 The following relationship is satisfied: |α 基 -α 增 | / α 基 ≤0.05.

[0017] Furthermore, the cross-sectional shape of the support structure is sawtooth or wavy.

[0018] Furthermore, the top edge of the support structure is adhered to the screen piece.

[0019] Furthermore, the reinforcement layer is formed by a plurality of strip-shaped sheets continuously or intermittently pasted on the base layer.

[0020] Furthermore, the cross-sectional shape of the strip sheet is trapezoidal or rectangular, and is pasted on one side or both sides of the base layer.

[0021] Furthermore, the screen is any one of a Fresnel structure screen, a line grating structure screen, a photon screen, a white plastic screen, a metal screen, a glass bead screen or a gray screen.

[0022] Furthermore, the base material is any one of polyethylene, polypropylene, polystyrene, polyvinyl chloride, cast polypropylene, biaxially oriented polypropylene film, polycarbonate, polyethylene terephthalate, polyamide, polyurethane, polymethyl methacrylate, polycarbonate or thermoplastic polyurethane elastomer rubber; the reinforcement layer material is any one of polyethylene, polypropylene, polystyrene, polyvinyl chloride, cast polypropylene, biaxially oriented polypropylene film, polycarbonate, polyethylene terephthalate, polyamide, polyurethane, polymethyl methacrylate, polycarbonate or thermoplastic polyurethane elastomer rubber.

[0023] The method for making the above-mentioned rollable projection screen is as follows: preparing a base material and a reinforcement layer material, wherein the volume change ratio of the base material and the volume change ratio of the reinforcement layer material are the same or similar; cutting the reinforcement layer material into a plurality of strip sheets, and affixing them continuously or intermittently to one or both sides of the base material; using the adjacent portions of the strip sheets on the base material as bending positions, and bending the base material alternately in positive and negative directions to form a support structure; applying adhesive to the top edge of any side of the support structure, and affixing it to the side of the rollable screen sheet away from the imaging display surface to produce a rollable projection screen.

[0024] Furthermore, the method for manufacturing a projection screen further includes: before applying adhesive to the top edge of any surface of the support structure, setting the curling direction of the screen piece, and arranging the top edge of the support structure in parallel with the curling direction of the screen piece.

[0025] The beneficial effects of the present invention are:

[0026] 1. The present application sets the support structure to include a base layer and a reinforcement layer, thereby improving the deformation resistance of the support structure. By bending the base layer and the reinforcement layer, the deformation resistance of the material is enhanced, thereby obtaining a support structure that can effectively flatten the rollable projection screen; by setting the volume change ratio of the base material and the volume change ratio of the reinforcement layer material to be the same or similar, the problem of inconsistent deformation of the support structure after a period of use due to inconsistent stress between the base material and the reinforcement layer material is avoided, resulting in uneven deformation of the projection screen after a period of use. The internal deformation of the support structure of the projection screen is relatively consistent, ensuring the flatness of the screen surface after repeated curling.

[0027] 2. The manufacturing method of the rollable projection screen of the present application effectively solves the problem of uneven deformation of the projection screen surface after use, thereby improving the stability of the projection screen during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of a rollable projection screen according to the first embodiment of the present application;

[0029] Figure 2 This is a schematic diagram of the support structure composition of Example 1 of the present application;

[0030] Figure 3 A schematic diagram of a support structure formed in accordance with an embodiment of the present application;

[0031] Figure 4 This is a schematic diagram of the cross-sectional shape of the support structure of Example 1 of the present application;

[0032] Figure 5 This is a schematic diagram of the support structure and the screen piece being attached in accordance with the first embodiment of the present application;

[0033] Figure 6 This is a schematic diagram of forming a reinforcement layer according to Example 1 of the present application;

[0034] Figure 7 This is a schematic diagram of a strip of sheet material according to an embodiment of the present application;

[0035] Figure 8 This is a schematic diagram of a strip of sheet material being arranged on a base layer in an embodiment of the present application;

[0036] Figure 9 This is a schematic diagram of the shape of the strip sheet constituting the reinforcement layer in Example 1 of the present application;

[0037] Figure 10 A schematic diagram of a projection screen is prepared for Example 2 of this application;

[0038] Figure 11 This is a schematic diagram of another method for manufacturing a projection screen according to the second embodiment of the present application.

[0039] Explanation of reference numerals: 10 - projection screen; 100 - screen piece; 1001 - imaging display surface; 200 - supporting structure; 2001 - base layer; 2002 - reinforcement layer; 2003 - top edge; 300 - strip sheet; o - bending position; 400 - adhesive. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0042] Example 1

[0043] Figure 1 Schematic diagram of a rollable projection screen according to the first embodiment of the present application; Figure 2 This is a schematic diagram of the support structure composition of Example 1 of the present application; Figure 3 This is a schematic diagram of the support structure of Example 1 of the present application.

[0044] See also Figures 1 to 3 A rollable projection screen 10 includes a rollable screen 100 and a support structure 200. The screen 100 includes an imaging display surface 1001 for imaging light emitted by a projector. The support structure 200 is arranged on a side of the screen 100 away from the imaging display surface 1001 and is used to flatten the rollable screen 100. The support structure 200 includes a base layer 2001 and a reinforcement layer 2002. The reinforcement layer 2002 is arranged on the base layer 2001. The support structure 200 is formed by bending the base layer 2001 and the reinforcement layer 2002 to enhance the deformation resistance of the base layer material and the reinforcement layer material.

[0045] The volume change ratio of the base material is α 基 , with the volume change ratio of the reinforcement layer material as α 增 , set α 基 With α 增 The same or similar, in this way, can effectively solve the problem that after the projection screen is repeatedly curled, the internal deformation of the supporting structure is inconsistent, resulting in uneven screen surface, so that the internal deformation of the supporting structure of the projection screen is relatively consistent, ensuring the flatness of the screen surface after repeated curling.

[0046] Volume change ratio α of the base material 基 and the volume change ratio α of the reinforcement material 增 , satisfying the following formula:

[0047] α 基 =ΔV 基 / (V 基 ×ΔT)

[0048] α 增 =ΔV 增 / (V 增 ×ΔT)

[0049] ΔV 基is the volume change of the base material;

[0050] V 基 is the original volume of the base material;

[0051] ΔV 增 is the volume change of the reinforcement layer material;

[0052] V 增 is the original volume of the reinforcement material;

[0053] ΔT is the temperature change.

[0054] Furthermore, the volume change ratio α of the base material 基 Volume change ratio α of the reinforcement layer material 增 The absolute value of the difference and the volume change ratio α of the base material 基 The ratio is less than or equal to 0.05, that is, |α 基 -α 增 | / α 基 ≤0.05. In this way, the volume change ratio α of the base material is controlled 基 and the volume change ratio α of the reinforcement material 增 This difference ensures relative consistency in deformation within the support structure composed of the base material and the reinforcement layer material, further ensuring that the screen surface 100 remains flat after repeated curling. Further explaining, the support structure formed by bending the base layer 2001 and the reinforcement layer 2002 significantly enhances its deformation resistance along the structural extension direction, allowing it to flatten the projection screen after curling. However, it can be curled arbitrarily perpendicular to the structural extension direction. Therefore, by aligning the curling direction of the support structure with the curling direction of the curlable screen sheet and then affixing them together, the resulting projection screen is also curlable.

[0055] To further explain, bending the base layer 2001 and the reinforcement layer 2002 to form a support structure, and then bonding it to the screen sheet 100 to form a projection screen, can effectively solve the problem of curling and deformation of the projection screen. During use, due to heat, pressure, and other issues, the stress and deformation of the base material and the reinforcement layer material often become inconsistent, resulting in inconsistent deformation of the support structure itself, causing uneven deformation of the projection screen surface, affecting image quality and image viewing. The volume change ratio α of the base material of this application is 基 and the volume change ratio α of the reinforcement material 增 The same or similar arrangement allows the support structure to maintain consistent internal deformation under heat or pressure, ensuring the smoothness of the screen surface 100 after repeated curling.

[0056] Figure 4 This is a schematic diagram of the cross-sectional shape of the support structure of Example 1 of this application. Figure 4 As shown in Figure a, the cross-section of the support structure 200 is sawtooth-shaped; Figure 4 As shown in Figure b, the cross-section of the support structure 200 is wavy. The cross-section of the support structure 200 can also be a continuously connected semicircular arc or other shapes with enhanced strength, which will not be listed here one by one.

[0057] Figure 5 This is a schematic diagram of the support structure and screen piece bonding in Example 1 of this application. Figure 5 As shown, the support structure 200 is formed by bending, and the support structure 200 has top edges 2003 on two opposite sides. The screen piece 100 is attached to the top edge 2003 on any side to form the rollable projection screen of the present application.

[0058] Figure 6 This is a schematic diagram of the formation of the reinforcement layer in Example 1 of the present application. Figure 6 As shown in Figure a, first, a number of strip sheets 300 are produced; secondly, as shown in Figure a Figure 6 As shown in Figure b, several strip sheets 300 are continuously pasted on the base layer 2001 to form a reinforcement layer 2002; or Figure 6 As shown in Figure c, several strip sheets 300 are glued to the base layer 2001 at intervals to form a reinforcement layer 2002. When the cross-section of the strip sheet is rectangular, in order to facilitate bending, several strip sheets 300 can be glued to the base layer 2001 at intervals to form a reinforcement layer 2002.

[0059] Figure 7 This is a schematic diagram of a strip of sheet material according to an embodiment of the present application; Figure 8 This is a schematic diagram of a strip of sheet material being arranged on a base layer in accordance with an embodiment of the present application. Figure 7 and Figure 8 ,like Figure 7 As shown in Figure a, the cross-sectional shape of the strip sheet 300 can be rectangular; Figure 7 As shown in Figure b, the cross-sectional shape of the strip sheet 300 can also be a trapezoid. Figure 8 As shown in Figure a, the strip sheet 300 can be pasted only on one side of the base layer 2001; Figure 8 As shown in Figures a and c, the strip sheets 300 can also be symmetrically / intervally pasted on both sides of the base layer 2001.

[0060] Figure 9 This is a schematic diagram of the shape of the strip sheet material constituting the reinforcement layer in Example 1 of the present application. Figure 9 As shown in Figure a, the shapes of the strip sheets 300 constituting the reinforcement layer can be completely the same; Figure 9 As shown in FIG. 2(b), the shapes of the strip sheets 300 constituting the reinforcement layer may be partially the same; Figure 9As shown in Figure c, the shape of the strip-shaped sheet 300 constituting the reinforcement layer can be completely different.

[0061] Furthermore, the rollable screen 100 can be a projection screen composed of a Fresnel structure, a projection screen composed of a line grating structure, a photonic projection screen composed of photonic crystals, a common white plastic screen, or any of a metal screen, a glass bead screen, or a gray screen. By providing the support structure of the present invention on the non-imaging display surface of these projection screens to form the rollable projection screen of the present invention, excellent flatness and stability can be achieved.

[0062] Furthermore, the base material can be any one of polyethylene, polypropylene, polystyrene, polyvinyl chloride, cast polypropylene, biaxially oriented polypropylene film, polycarbonate, polyethylene terephthalate, polyamide, polyurethane, polymethyl methacrylate, polycarbonate, thermoplastic polyurethane elastomer rubber, etc.

[0063] Furthermore, the reinforcing layer material can be any one of polyethylene, polypropylene, polystyrene, polyvinyl chloride, cast polypropylene, biaxially oriented polypropylene film, polycarbonate, polyethylene terephthalate, polyamide, polyurethane, polymethyl methacrylate, polycarbonate, thermoplastic polyurethane elastomer rubber, etc.

[0064] This embodiment improves the deformation resistance of the support structure by configuring the support structure to include a base layer and a reinforcement layer. The support structure is formed by bending the base layer and the reinforcement layer, thereby further enhancing the deformation resistance of the base material and the reinforcement layer material, thereby obtaining a support structure capable of effectively flattening the rollable projection screen. Furthermore, by configuring the volume change ratio of the base material and the volume change ratio of the reinforcement layer material to be the same or similar, the problem of inconsistent deformation of the support structure after a period of use due to inconsistent stress between the base material and the reinforcement layer material is avoided, thereby avoiding the problem of uneven deformation of the projection screen surface after a period of use. The internal deformation of the support structure of the projection screen is made relatively consistent, thereby ensuring the flatness of the screen surface after repeated curling.

[0065] Example 2

[0066] Figure 10 A schematic diagram of a projection screen is prepared for Example 2 of this application; Figure 11 This is a schematic diagram of another method for manufacturing a projection screen according to the second embodiment of the present application.

[0067] See also Figure 10 , a method for manufacturing a rollable projection screen, preparing a base material and a reinforcement layer material, wherein the volume change ratio of the base material and the volume change ratio of the reinforcement layer material are the same or similar; Figure 10As shown in Figure a, the reinforcement layer material is cut into several strip sheets 300; Figure 10 As shown in Figure b, the strip sheet 300 is continuously or intermittently pasted on one or both sides of the base material; Figure 10 As shown in Figures c and d, the adjacent parts of the strips on the base material are used as the bending positions o, and the base material is bent alternately by positive bending and reverse bending, and finally formed as shown in Figures c and d. Figure 10 The support structure 200 is shown in FIG. e; then, Figure 10 As shown in FIG. 5 , adhesive 400 is applied to the top edge of any side of the support structure 200; finally, as shown in FIG. Figure 10 As shown in Figure g, the rollable projection screen 10 is made by pasting it to the side of the rollable screen sheet 100 away from the imaging display surface 1001.

[0068] To further explain, the production method of the strip sheet 300 is not limited, and it is advantageous to select the material of the strip sheet 300, which facilitates the processing and production of the strip sheet 300, thereby realizing the control of the production process of the support structure. Generally, laser cutting can be used. The processing quality of the strip sheet produced by this method is very high, and the entire cutting process is very fast. Automatic typesetting can be achieved through design, saving materials, the entire cutting surface is smooth and clean, and processing costs are reduced. Cutting with a knife can also be used. The appropriate knife can be selected according to the material requirements to improve cutting efficiency and protect the cutting surface.

[0069] Furthermore, the adhesive may be a resin material such as acrylic adhesive, natural rubber, synthetic rubber, polyurethane adhesive, pressure-sensitive adhesive, or hot-melt adhesive.

[0070] Further explanation, such as Figure 10 As shown in Figure c, the adjacent parts of the sheets on the base material are taken as the bending position o, and the base material is bent; Figure 10 As shown in Figure d, the adjacent parts of the sheets on the base material are used as bending positions o, and the base material is reversed.

[0071] Specifically, the strength of the position where the strip sheet is bonded on the base layer can be simply understood as the sum of the strengths of the base material and the strip sheet material, while the strength at the adjacent position of the strip sheet is only the strength of the base material. Therefore, a relatively weak strength area is formed at the adjacent position of the strip sheet, which facilitates bending; in addition, the adjacent positions of each strip sheet on the base layer also play a role in positioning the bending position of the base material, so it is easy to produce the required support structure shape.

[0072] To further explain, when the base material is bent forward or backward, a bending machine can be used directly for production.

[0073] Furthermore, before the base layer is bent forward and backward, adhesive 400 may be applied adjacent to the forward-bending strip sheet 300 to shape the support structure after bending, facilitating subsequent bonding with the rollable curtain panel 100. Adhesive may also be applied at the forward and backward bends to shape the support structure after bending, facilitating subsequent bonding with the rollable curtain panel.

[0074] Furthermore, after the base layer is bent forwardly and backwardly, adhesive can be provided at the forward and backward bending locations to shape the supporting structure after bending, so as to facilitate subsequent bonding with the rollable curtain sheet.

[0075] Furthermore, before applying adhesive to the top edge of any side of the support structure, the method further includes: setting the curling direction of the screen. Figure 11 As shown in FIG. a, the curling direction X of the curlable curtain sheet 100 is set; then, Figure 11 As shown in Figure b, the top edges 2003 of the support structure 200 are arranged in a direction Y parallel to the curling direction X of the rollable screen 100. Adhesive 400 is then applied to several top edges 2003 on any side of the support structure 200, and the non-imaging display surface of the rollable screen 100 is bonded to the top edges 2003 of the support structure, thereby producing a rollable projection screen with a support structure.

[0076] The rollable projection screen manufactured by the method effectively solves the problem of uneven deformation of the projection screen surface after use, thereby improving the use stability of the projection screen.

[0077] Further explanation, such as Figure 11 As shown in Figure b, the top edge 2003 of the support structure is on both sides of the support structure, and the top edge 2003 on any side of the support structure can be bonded to the rollable curtain piece.

[0078] Specifically, the adhesive can be any resin material such as acrylic adhesive, natural rubber, synthetic rubber, polyurethane adhesive, pressure-sensitive adhesive, or hot-melt adhesive. The adhesive is used to adhere the support structure to the rollable screen piece.

[0079] The rollable projection screen manufactured by the present method avoids the problem of inconsistent deformation of the support structure after a period of use due to inconsistent stress between the base material and the reinforcement layer material by setting the volume change ratio of the base material and the volume change ratio of the reinforcement layer material to be the same or similar, which causes the projection screen to have uneven deformation after a period of use. The internal deformation of the support structure of the projection screen is relatively consistent, ensuring the flatness of the screen surface after repeated rolling, and further improving the stability of the projection screen.

[0080] Those skilled in the art will appreciate that the embodiments described herein are intended to help readers understand the principles of the present invention, and it should be understood that the scope of protection of the present invention is not limited to such specific descriptions and embodiments. Those skilled in the art can make various other specific variations and combinations based on the technical teachings disclosed in the present invention without departing from the essence of the present invention, and such variations and combinations are still within the scope of protection of the present invention.

Claims

1. A rollable projection screen, characterized in that: The invention comprises a rollable screen and a support structure, wherein the screen comprises an imaging display surface for imaging the light emitted by the projector, and the support structure is arranged on a side of the screen away from the imaging display surface; the support structure comprises a base layer and a reinforcement layer, the reinforcement layer is arranged on the base layer, and the support structure is formed by bending the base layer and the reinforcement layer; the volume change ratio of the base layer material is α 基 , with the volume change ratio of the reinforcement layer material as α 增 ,α 基 With α 增 The same or similar, the α 基 , α 增 Satisfy the following formula: a 基 =ΔV 基 / (V 基 ×ΔT) a 增 =ΔV 增 / (V 增 ×ΔT) ΔV 基 is the volume change of the base material; V 基 is the original volume of the base material; ΔV 增 is the volume change of the reinforcement layer material; V 增 is the original volume of the reinforcement material; ΔT is the temperature change.

2. The projection screen according to claim 1, wherein α 基 With α 增 The following relationship is satisfied: |α 基 -α 增 | / α 基 ≤0.

05.

3. The projection screen according to claim 1, wherein: The cross-section of the support structure is sawtooth or wavy.

4. The projection screen according to claim 3, characterized in that The top edge of the supporting structure is adhered to the curtain piece.

5. The projection screen according to claim 1, wherein The reinforcing layer is formed by continuously or intermittently pasting a plurality of strip-shaped sheets on the base layer.

6. The projection screen according to claim 5, characterized in that The strip sheet has a trapezoidal or rectangular cross-section and is adhered to one or both sides of the base layer.

7. The projection screen according to claim 1, wherein: The screen piece is any one of a Fresnel structure screen, a line grating structure screen, a photon screen, a white plastic screen, a metal screen, a glass bead screen or a gray screen.

8. The projection screen according to claim 1, wherein The base material is any one of polyethylene, polypropylene, polystyrene, polyvinyl chloride, cast polypropylene, biaxially oriented polypropylene film, polycarbonate, polyethylene terephthalate, polyamide, polyurethane, polymethyl methacrylate, polycarbonate, and thermoplastic polyurethane elastomer rubber; the reinforcement layer material is any one of polyethylene, polypropylene, polystyrene, polyvinyl chloride, cast polypropylene, biaxially oriented polypropylene film, polycarbonate, polyethylene terephthalate, polyamide, polyurethane, polymethyl methacrylate, polycarbonate, and thermoplastic polyurethane elastomer rubber.

9. A method for manufacturing a rollable projection screen, characterized in that: A base material and a reinforcement layer material are prepared, wherein the volume change ratio of the base material is the same as or similar to the volume change ratio of the reinforcement layer material; the reinforcement layer material is cut into a plurality of strip sheets, which are continuously or intermittently adhered to one or both sides of the base material; the base material is bent alternately in positive and negative directions, using the adjacent portions of the strip sheets on the base material as bending positions, to produce a support structure; an adhesive is applied to the top edge of any side of the support structure, and the structure is adhered to the side of the rollable screen piece away from the imaging display surface to produce a rollable projection screen.

10. The manufacturing method according to claim 9, characterized in that: Also includes: Before applying adhesive to the top edge of any surface of the support structure, the curling direction of the screen piece is set, and the arrangement direction of the top edge of the support structure is arranged parallel to the curling direction of the screen piece.

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