Projection screen

Abstract

The application discloses a projection screen and belongs to the field of projection equipment. The projection screen comprises a projection curtain, a support structure layer and a reel assembly. One end of the projection curtain and the support structure layer is connected with the reel assembly, and the support structure layer is located at the back of the projection curtain. The support structure layer comprises a flexible base layer and a plurality of hard support strips located on the flexible base layer. The support strips extend along a first direction, and at least a part of the orthographic projection of the support strips on the projection curtain is located in a light receiving area. The first direction is parallel to the axis of the reel assembly. With this structure, the projection curtain can be supported by the plurality of support strips, reducing the possibility of edge curling of the projection curtain. The support structure layer and the flexible base layer realize a soft and hard combined support structure layer, which does not exert a large pressure on the projection curtain during curling. The problem that the projection screen is easily damaged in the related art is solved, and the protection effect of the projection screen is improved.

Description

Technical Field

[0001] This application relates to the field of projection equipment, and in particular to a projection screen. Background Technology

[0002] A projection screen is a device used to receive images projected by a projector.

[0003] A projection screen includes a screen, a roller blind, and a roller. The back of the screen is attached to the roller blind, and one end of the screen and the roller blind are connected to the roller for easy storage on the roller. The roller blind includes multiple metal slats connected end to end, which can be used to support the screen to prevent the edges of the screen from curling.

[0004] However, when the aforementioned projection screen is rolled up, the roller shutter can easily squeeze the screen, causing the projection screen to be easily damaged. Summary of the Invention

[0005] This application provides a projection screen. The technical solution is as follows:

[0006] According to one aspect of the embodiments of this application, a projection screen is provided, the projection screen including: a projection screen, a support structure layer, and a roll assembly;

[0007] The projection screen and one end of the supporting structure layer are connected to the roll assembly, and the supporting structure layer is located on the back of the projection screen, while the front of the projection screen has a light-receiving area.

[0008] The support structure layer includes a flexible base layer and a plurality of rigid support strips located on the side of the flexible base layer away from the projection screen. The support strips extend along a first direction, and at least a portion of the orthogonal projection of the support strips onto the projection screen is located within the light-receiving area. The first direction is a direction parallel to the axis of the roll assembly.

[0009] Optionally, the support structure layer further includes a first magnetic structure located on the flexible substrate layer, and the projection screen includes a projection screen layer and a second magnetic structure located on the side of the projection screen layer facing the support structure layer, wherein the first magnetic structure and the second magnetic structure are attracted to each other.

[0010] Optionally, the first magnetic structure includes a plurality of magnetic strips;

[0011] The plurality of magnetic strips and the plurality of support strips are arranged in multiple strip groups on the flexible substrate, and each strip group includes at least one magnetic strip and at least one support strip.

[0012] Optionally, each of the strip groups includes one of the magnetic strips and one of the support strips.

[0013] Optionally, the material of the support strip includes a magnetic material, and the plurality of support strips are reused as the first magnetic structure;

[0014] Alternatively, the first magnetic structure may be a magnetic layer located on the flexible substrate.

[0015] Optionally, the support strip is bonded to the flexible substrate layer;

[0016] Alternatively, the support structure layer may further include a plurality of fixed structures located on the flexible substrate layer, with the support strip located on the fixed structures;

[0017] Alternatively, the support structure layer may further include a cover layer, with the plurality of support strips located between the cover layer and the flexible base layer.

[0018] Optionally, the support structure layer further includes a mesh-like filament structure;

[0019] The flexible substrate has mesh-like grooves, and the mesh-like filament structure is located in the mesh-like grooves on the flexible substrate.

[0020] Optionally, the flexible substrate layer includes a substrate layer, a reinforcing layer, and an elastic layer, wherein the reinforcing layer covers the substrate layer and the elastic layer covers the reinforcing layer.

[0021] Optionally, the material of the support strip includes at least one of carbon fiber, glass fiber, aluminum alloy, polycarbonate, and polyethylene terephthalate.

[0022] Optionally, the roll assembly includes a first roll, and one end of the projection screen and one end of the support structure layer are both connected to the first roll;

[0023] Alternatively, the roll assembly includes a second roll and a third roll, with one end of the projection screen connected to the second roll and one end of the support structure layer connected to the third roll.

[0024] According to another aspect of the embodiments of this application, a projection device is provided, which includes a projector and any of the above-described projection screens.

[0025] The beneficial effects of the technical solutions provided in this application include at least the following:

[0026] A projection screen is provided, comprising a projection screen, a support structure layer, and a roll assembly. The support structure layer includes a flexible base layer and multiple rigid support strips located on the flexible base layer. The orthogonal projection of the support strips onto the projection screen is connected to two opposite edges of the projection screen in a first direction. In this way, the projection screen can be supported by these multiple support strips, reducing the possibility of the projection screen edges curling. Furthermore, this support structure layer and the flexible base layer achieve a soft-rigid combination support structure layer, which will not exert excessive pressure on the projection screen when it is rolled up. This solves the problem of easy damage to projection screens in related technologies and improves the protection effect of the projection screen.

[0027] In addition, the projection screen substrate is a flexible substrate layer, and the length direction of the rigid support strip is parallel to the axis of the roll and located on the side of the flexible substrate layer away from the projection screen. Therefore, when the projection screen is rolled up, the rigid support strip will not affect the rolling of the projection screen, thereby improving the rolling performance of the projection screen, reducing the rolling radius of the projection screen, and facilitating the miniaturization of the projection screen. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of a projection screen;

[0030] Figure 2 This is a schematic diagram of another type of projection screen;

[0031] Figure 3 This is a schematic diagram of the structure of a projection screen provided in an embodiment of this application;

[0032] Figure 4 yes Figure 3 The right view of the projection screen shown;

[0033] Figure 5 This is a schematic diagram of another projection screen structure provided in an embodiment of this application;

[0034] Figure 6 This is a schematic diagram of another projection screen structure provided in an embodiment of this application;

[0035] Figure 7 This is a schematic diagram of another projection screen structure provided in an embodiment of this application;

[0036] Figure 8This is a schematic diagram of another projection screen structure provided in an embodiment of this application;

[0037] Figure 9 This is a schematic diagram of another projection screen structure provided in an embodiment of this application;

[0038] Figure 10 This is a schematic diagram of another projection screen structure provided in an embodiment of this application;

[0039] Figure 11 This is a schematic diagram of another projection screen structure provided in an embodiment of this application;

[0040] Figure 12 This is a schematic diagram of another projection screen structure provided in an embodiment of this application;

[0041] Figure 13 This is a schematic diagram of the structure of a support structure layer in a projection screen provided in an embodiment of this application;

[0042] Figure 14 This is a schematic diagram of another projection screen structure provided in an embodiment of this application;

[0043] Figure 15 This is a schematic diagram of the structure of a projection device provided in an embodiment of this application.

[0044] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0046] A projection screen is a device used to receive images projected by a projector. To improve ease of use, some projection screens are now designed to be rolled up and stored in a reel. For example... Figure 1 As shown, Figure 1This is a schematic diagram of a projection screen, which includes a beam 11, a roller 12, and a flexible screen 13. The beam 11 is located at the upper edge of the screen 13, and the roller 12 is located at the lower edge of the screen 13. The roller 12 and the beam 11 can tighten the screen 13. The tension in all directions of the central area 131 of the screen 13 is basically equal, resulting in a high degree of flatness in the central area 131. However, the forces on the off-center areas of the screen 131 are not equal in different directions. In particular, there is no external force in the left and right edge areas 132, which causes an imbalance between the left and right sides of the edge areas 132. This imbalance can cause the screen to shrink inward, curl, and wrinkle, affecting the display effect of the projection screen.

[0047] To solve the problem of uneven edges on the screen, a projection screen can be like... Figure 2 As shown, Figure 2 This is a schematic diagram of another type of projection screen. Figure 2 This can be a side view of the projection screen (the viewing angle can be parallel to the screen surface). The projection screen includes a screen 21, a roller blind 22, and a roller 23. The back of the screen 21 (the screen can include a front and a back, with the front being the side that carries the image) is attached to the roller blind 22, and one end of the screen 21 and the roller blind 22 are connected to the roller 23 for easy storage on the roller 23. The roller blind 22 includes multiple metal roller blinds 221 connected end to end, which can be used to support the screen 21 to prevent the edges of the screen 21 from curling.

[0048] However, when the projection screen is rolled up (such as when it is rolled up and stored in the roller 23), the metal roller shutter 221 has high hardness, which will put great pressure on the screen 21, which may damage the screen. In addition, the roller shutter 22 composed of multiple metal roller shutters 221 has poor bending performance and a large bending radius, which makes the size of the roller 23 large, which is not conducive to the miniaturization of the projection screen.

[0049] This application provides a projection screen that can solve some of the problems existing in the related technologies.

[0050] Figure 3 This is a schematic diagram of the structure of a projection screen provided in an embodiment of this application. Figure 4 yes Figure 3 Please refer to the right view of the projection screen shown. Figure 3 and Figure 4 The projection screen 30 includes: a projection screen 31, a support structure layer 32, and a roll assembly 33.

[0051] One end of the projection screen 31 and the support structure layer 32 is connected to the roll assembly 33, and the support structure layer 32 is located on the back of the projection screen 31, and the front of the projection screen 31 has a light-receiving area q1.

[0052] The support structure layer 32 includes a flexible base layer 321 and a plurality of rigid support strips 322 located on the side of the flexible base layer 321 away from the projection screen 31. The support strips 322 extend along a first direction f1, and at least a portion of the orthogonal projection of the support strips 322 onto the projection screen 31 is located within the light-receiving area q1. Figure 3 The diagram shows a case where part of the orthogonal projection of the support bar 322 on the projection screen 31 is located within the light-receiving area q1 and another part is located outside the light-receiving area q1 (but this is not a limitation), and the first direction f1 is a direction parallel to the axis z1 of the roll assembly 33.

[0053] The projection screen 31 may include an optical film, and the light-receiving area q1 may be the area where the optical film is located.

[0054] In summary, the embodiments of this application provide a projection screen including a projection screen, a support structure layer, and a roll assembly. The support structure layer includes a flexible base layer and multiple rigid support strips located on the flexible base layer. The orthographic projection of the support strips on the projection screen is connected to two opposite edges of the projection screen in a first direction. In this way, the projection screen can be supported by these multiple support strips, reducing the possibility of the projection screen edges curling. Furthermore, the support structure layer and the flexible base layer achieve a support structure layer that combines softness and rigidity, and will not exert excessive pressure on the projection screen when it is rolled up. This solves the problem of easy damage to the projection screen in related technologies and improves the protection effect of the projection screen.

[0055] In addition, the projection screen substrate is a flexible substrate layer, and the length direction of the rigid support strip is parallel to the axis of the roll and located on the side of the flexible substrate layer away from the projection screen. Therefore, when the projection screen is rolled up, the rigid support strip will not affect the rolling of the projection screen, thereby improving the rolling performance of the projection screen, reducing the rolling radius of the projection screen, and facilitating the miniaturization of the projection screen.

[0056] It should be noted that there may be a gap between adjacent support bars. This gap can be determined through experimentation to ensure the flatness of the projection screen using as few support bars as possible.

[0057] Figure 5 This is a schematic diagram of another projection screen provided in an embodiment of this application. The projection screen... Figure 3The projection screen shown has undergone some adjustments. Specifically, the support structure layer 32 further includes a first magnetic structure 323 located on the flexible substrate layer 321. The projection screen 31 includes a projection screen layer 311 and a second magnetic structure 312 located on the side of the projection screen layer 311 facing the support structure layer 32. The first magnetic structure 323 and the second magnetic structure 312 are mutually attracted. The first magnetic structure 323 and the second magnetic structure 312 can attract each other to achieve a close fit between the projection screen 31 and the support structure layer 32. The first magnetic structure 323 can be located on the side of the flexible substrate layer 321 away from the projection screen 31 to reduce the possibility of the first magnetic structure 323 damaging the projection screen 31, thus improving the protection of the projection screen 31.

[0058] Figure 5 The diagram shows a structure where the first magnetic structure 323 is a magnetic layer located on a flexible substrate layer 321. This magnetic layer can attract the second magnetic structure 312 in the projection screen 31, causing the projection screen 31 to adhere to the supporting structure layer 32. The magnetic layer of the first magnetic structure 323 can be located on the side of the flexible substrate layer 321 away from the projection screen 31. In this structure, the flexible substrate layer 321 can act as a buffer layer to prevent the first magnetic structure 323 from directly contacting the projection screen 31, reducing the possibility of damage to the projection screen 31 during the rolling process and improving the protection of the projection screen 31.

[0059] In one exemplary embodiment, a magnetic layer can be formed on the flexible substrate 321 by means of spraying, pasting, printing, doping, etc. Alternatively, a magnetic material can be added to the flexible substrate 321 to mix the magnetic layer with the flexible substrate 321 into one layer. This application embodiment does not limit this.

[0060] The above Figure 5 This application provides a method for setting the first magnetic structure, but embodiments of this application can also set the first magnetic structure in other ways. For example... Figure 6 As shown, Figure 6 This is a schematic diagram of another projection screen structure provided in an embodiment of this application. The first magnetic structure 323 includes multiple magnetic strips t, which, along with multiple support strips 322, are arranged in multiple strip groups g on a flexible substrate. Each strip group g includes at least one magnetic strip t and at least one support strip 322. In this structure, the magnetic strips t can also be made of a rigid material. Therefore, the magnetic strips t can not only attract each other to the second magnetic structure in the projection screen, but also work with the support strips 322 to support the edges of the projection screen, thereby improving the flatness of the projection screen edges.

[0061] Figure 6 The diagram illustrates a structure of a strip group g including a magnetic strip t and a support strip 322. However, a strip group g may also include other numbers of magnetic strips t and support strips 322. The number of magnetic strips t and support strips 322 in the strip group g may be the same or different, and the number of magnetic strips t and support strips 322 in different strip groups g may be the same or different. For example, ... Figure 7 As shown, Figure 7 This is a schematic diagram of another projection screen structure provided in an embodiment of this application, wherein a strip group g may include two magnetic strips t and two support strips 322, or, as Figure 8 As shown, Figure 8 This is a schematic diagram of another projection screen structure provided in an embodiment of this application, wherein a strip group g may include two magnetic strips t and a support strip 322, or, as Figure 9 As shown, Figure 9 This is a schematic diagram of another projection screen structure provided in the embodiments of this application. In this embodiment, among the multiple strip groups g, one strip group g may include two magnetic strips t and one support strip 322, while another strip group g may include two magnetic strips t and two support strips 322. The embodiments of this application do not impose any limitations on this.

[0062] Figure 10 This is a schematic diagram of another projection screen structure provided in an embodiment of this application. The support strip 322 is made of magnetic material, and multiple support strips 322 are reused to form a first magnetic structure 323. In this structure, the support strips 322 are reused to form the first magnetic structure 323, which, together with the support strips 322, can be distributed across the flexible substrate layer 321. This improves the stability of the adhesion between the support structure layer 32 and the projection screen 31. On the one hand, it prevents the projection screen 31 from detaching from the support structure layer 32 when the projection screen is rolled or unfolded; on the other hand, it improves the support effect of the support structure layer 32 on the projection screen 31, enhances the flatness of the edges of the projection screen 31, and improves the display effect of the projection screen.

[0063] Furthermore, the first magnetic structure can also be incorporated into a flexible substrate. For example, magnetic powder can be added to the flexible substrate using methods such as spraying, printing, doping, or bonding. Adding ferromagnetism is not limited to the front, back, or middle of the synthetic fabric; as long as magnetism is added, it can be attracted to a magnet.

[0064] It should be noted that, in one scenario, of the first magnetic structure located in the support structure layer and the second magnetic structure located in the projection screen, one magnetic structure can be a magnetic material, such as a magnet, magnetic ore, or other magnetized metals, while the other magnetic structure can be a material that can be attracted by magnetic materials, such as iron, nickel, or cobalt. In this structure, the first magnetic structure in the support structure layer and the second magnetic structure in the projection screen can attract each other. Alternatively, in another scenario, both the first magnetic structure in the support structure layer and the second magnetic structure in the projection screen can be magnetic materials, but their magnetic properties are opposite. In this structure, the first magnetic structure in the support structure layer and the second magnetic structure in the projection screen can also attract each other.

[0065] When the first magnetic structure in the support structure layer and the second magnetic structure in the projection screen attract each other, the support structure layer can attract the projection screen after the projection screen is unfolded, so that the inside and edges of the projection screen can achieve a flat effect.

[0066] Furthermore, the first magnetic structure can be distributed throughout the entire support structure layer, or it can be located only in a portion of the support structure layer. For example, the first magnetic structure can be located only at the two horizontal edges of the support structure layer to ensure effective support at the edges of the projection screen. Alternatively, the magnetism of the first magnetic structure can vary in different areas. For example, the magnetism of the first magnetic structure at the two horizontal edges of the support structure layer can be stronger than that in other areas to further enhance the support effect at the edges of the projection screen.

[0067] In the projection screen provided in the embodiments of this application, the support strip can be set on the flexible substrate in a variety of ways. In one way, the support strip is bonded to the flexible substrate.

[0068] The material of the flexible base layer may include a synthetic fabric made of Oxford cloth. Since the surface of Oxford cloth is difficult to directly adhere, the synthetic fabric may include Oxford cloth and a coating on the Oxford cloth. The coating may be applied to the Oxford cloth by coating or spraying, and then the support strip may be bonded to the flexible base layer by an adhesive.

[0069] In another way, please refer to Figure 11 , Figure 11This is a schematic diagram of another projection screen structure provided in an embodiment of this application. The support structure layer 32 further includes multiple fixing structures d located on the flexible base layer 321, with support strips 322 located on the fixing structures d. The fixing structure d can be a net, a storage bag, or other structures; this embodiment of the application does not impose any limitations on this.

[0070] In another way, please refer to Figure 12 , Figure 12 This is a schematic diagram of another projection screen structure provided in an embodiment of this application. The supporting structure layer 32 further includes a cover layer 324, with multiple support strips 322 located between the cover layer 324 and the flexible base layer 321. The cover layer 324 can also be made of a flexible material, such as Oxford cloth, and this embodiment of the application does not impose any limitations on this.

[0071] In this embodiment, the material of the flexible substrate layer may include a synthetic fabric. The synthetic step may be to use polyester filament raw materials that are not easily deformed and have high tensile strength, and to weave them into an elastic densified Oxford cloth, which is a high-strength elastic Oxford cloth.

[0072] like Figure 13 As shown, Figure 13 This is a schematic diagram of the structure of a support structure layer in a projection screen provided in an embodiment of this application. Figure 13 The side shown is the side of the support structure layer without support strips. The support structure layer 32 also includes a mesh-like filament structure 325. The flexible substrate layer 321 has mesh-like grooves c, and the mesh-like filament structure 325 is located in the mesh-like grooves c on the flexible substrate layer 321.

[0073] In this structure, the mesh structure composed of the mesh grooves c and the mesh wire structure 325 can compensate for the lateral tensile force (which can refer to the direction parallel to the axis of the roll assembly) on the support structure layer, thereby improving the tensile strength of the support structure layer in the lateral direction and thus improving the strength and flatness of the support structure layer.

[0074] In one exemplary embodiment, the flexible substrate layer may include a substrate layer, a reinforcing layer, and an elastic layer, with the reinforcing layer covering the substrate layer and the elastic layer covering the reinforcing layer. The substrate layer, reinforcing layer, and elastic layer may be Oxford cloth manufactured using different processes to give them different functions. For example, the reinforcing layer may be a high-strength Oxford cloth, and the elastic layer may be a highly elastic Oxford cloth. The reinforcing layer can compensate for longitudinal (which may refer to the direction perpendicular to the axis of the roll assembly) tension experienced by the flexible substrate layer, improving the longitudinal tensile strength of the flexible substrate layer, thereby enhancing the robustness and flatness of the supporting structure layer.

[0075] The flexible substrate layer provided in the above embodiments has high elasticity and strength in both the transverse and longitudinal directions, enabling the flexible substrate layer to withstand deformation forces in all directions.

[0076] It should be noted that, since the surface of Oxford cloth is difficult to directly adhere, coatings can be applied to the surfaces of the substrate, reinforcing layer, and elastic layer respectively, and then adhesives can be used to bond the substrate, reinforcing layer, and elastic layer together to prevent separation. In this structure, ferromagnetic materials can be added to the substrate, elastic layer, reinforcing layer, or the polyester raw material of the Oxford cloth to integrate the first magnetic structure into the flexible substrate.

[0077] In one exemplary embodiment, the material of the support strip includes at least one of various rigid materials, such as carbon fiber, glass fiber, aluminum alloy, polycarbonate (PC), and polyethylene terephthalate (PET).

[0078] In the projection screen provided in this embodiment, a rigid support strip is disposed on a flexible base layer, thus providing a rigid-flexible support structure layer. When the projection screen is unfolded, the rigid support strip supports the projection screen, improving its flatness, especially the flatness of the two horizontal edges, thereby enhancing the display effect of the image displayed on the screen. When the projection screen is folded up, the flexible base layer has good bending performance, and because the rigid support strip is parallel to the axis of the roll assembly, it can be rolled up along with the flexible base layer and the projection screen, and wound around the roll assembly without putting excessive pressure on the projection screen, protecting it and extending the lifespan of the projection screen.

[0079] In the projection screen provided in the above embodiment, the roll assembly 33 includes a first roll, with one end of the projection screen 31 and one end of the support structure layer 32 both connected to the first roll. In this structure, the projection screen 31 and the support structure layer 32 can both be rolled up and stored in the same first roll. This structure has advantages such as simple structure and small size.

[0080] like Figure 14 As shown, Figure 14This is a schematic diagram of another projection screen structure provided in an embodiment of this application. In this projection screen, the roll assembly 33 includes a second roll 332 and a third roll 333 (the axis of the second roll 332 can be parallel to the axis of the third roll 333; the roll assembly 33 involved in the above embodiment can refer to the axis of the second roll 332 or the axis of the third roll 333). One end of the projection screen 31 is connected to the second roll 332, and one end of the support structure layer 32 is connected to the third roll 333. In this structure, the projection screen 31 and the support structure layer 32 can be rolled up and stored in two different rolls. This structure can prevent the support structure layer 32 from damaging the projection screen 31 after rolling, thus improving the protection of the projection screen 31.

[0081] In one exemplary embodiment, the projection screen provided in this application may further include a crossbeam, which may be located at the other end of the projection screen opposite to the roll assembly and may be used to support that end of the projection screen.

[0082] Furthermore, the projection screen provided in this application embodiment can be a pull-down projection screen or an upward projection screen. When the projection screen is a pull-down projection screen, after it is set in a preset position, the user can pull the projection screen and supporting structure layer out from the roll assembly from top to bottom. When the projection screen is an upward projection screen, after it is set in a preset position, the user can pull the projection screen and supporting structure layer out from the roll assembly from bottom to top. In this case, the pulled-out projection screen and supporting structure layer can be fixed in a preset position (such as a hook on the wall, or by fixing the projection screen and supporting structure layer with a bracket).

[0083] In summary, the embodiments of this application provide a projection screen including a projection screen, a support structure layer, and a roll assembly. The support structure layer includes a flexible base layer and multiple rigid support strips located on the flexible base layer. The orthographic projection of the support strips on the projection screen is connected to two opposite edges of the projection screen in a first direction. In this way, the projection screen can be supported by these multiple support strips, reducing the possibility of the projection screen edges curling. Furthermore, the support structure layer and the flexible base layer achieve a support structure layer that combines softness and rigidity, and will not exert excessive pressure on the projection screen when it is rolled up. This solves the problem of easy damage to the projection screen in related technologies and improves the protection effect of the projection screen.

[0084] In addition, the projection screen substrate is a flexible substrate layer, and the length direction of the rigid support strip is parallel to the axis of the roll and located on the side of the flexible substrate layer away from the projection screen. Therefore, when the projection screen is rolled up, the rigid support strip will not affect the rolling of the projection screen, thereby improving the rolling performance of the projection screen, reducing the rolling radius of the projection screen, and facilitating the miniaturization of the projection screen.

[0085] like Figure 15 As shown, Figure 15 This is a schematic diagram of the structure of a projection device provided in an embodiment of this application. The projection device includes a projector 40 and any of the projection screens 30 provided in the above embodiments.

[0086] When using this projection device, the projection screen 31 and the support structure layer 32, which are rolled up and stored in the roll assembly 33, can be pulled out and fixed from the roll assembly 33. Then, the projector 41 can be turned on, and the projector 41 can project the image onto the projection screen 31. Since the support structure layer 32 can improve the flatness of the projection screen 31, especially the flatness of the edges of the projection screen 31, it reduces the possibility of problems such as inward shrinkage, curling, and wrinkles at the edges of the projection screen 31. As a result, the image can be presented on a projection screen with higher flatness, thus improving the display effect of the image.

[0087] In this projection device, the projection screen provided in the above embodiment is used, and a rigid support strip is set on a flexible base layer. This provides a rigid-flexible support structure layer. When the projection screen is unfolded, the rigid support strip supports the projection screen, improving its flatness, especially the flatness of the two horizontal edges, thereby enhancing the display effect of the image displayed on the screen. When the projection screen is folded up, the flexible base layer has good bending performance, and since the rigid support strip is parallel to the axis of the roll assembly, it can be rolled up along with the flexible base layer and the projection screen, and wrapped around the roll assembly without putting excessive pressure on the projection screen, thus protecting the screen and extending its lifespan. This reduces the operating cost of the projection device.

[0088] In one exemplary embodiment, the projector 40 can be an ultra-short-throw projector, which can shorten the distance between the projector 40 and the projection screen 30, making it easier to miniaturize the projection device.

[0089] In summary, this application provides a projection device whose projection screen includes a projection screen, a support structure layer, and a roll assembly. The support structure layer includes a flexible base layer and multiple rigid support strips located on the flexible base layer. The orthogonal projection of the support strips onto the projection screen is connected to two opposite edges of the projection screen in a first direction. In this way, the projection screen can be supported by these multiple support strips, reducing the possibility of the projection screen edges curling. Furthermore, the support structure layer and the flexible base layer form a support structure layer with both soft and rigid components, which will not exert excessive pressure on the projection screen when it is rolled up. This solves the problem of easy damage to the projection screen in related technologies and improves the protection effect of the projection screen.

[0090] In addition, the projection screen substrate is a flexible substrate layer, and the length direction of the rigid support strip is parallel to the axis of the roll and located on the side of the flexible substrate layer away from the projection screen. Therefore, when the projection screen is rolled up, the rigid support strip will not affect the rolling of the projection screen, thereby improving the rolling performance of the projection screen, reducing the rolling radius of the projection screen, and facilitating the miniaturization of the projection screen.

[0091] In this application, the term "at least one of A and B" merely describes the relationship between related objects, indicating that three relationships can exist. For example, "at least one of A and B" can represent: A existing alone, A and B existing simultaneously, and B existing alone. Similarly, "at least one of A, B, and C" indicates that seven relationships can exist, representing: A existing alone, B existing alone, C existing alone, A and B existing simultaneously, A and C existing simultaneously, C and B existing simultaneously, and A, B, and C existing simultaneously. Likewise, "at least one of A, B, C, and D" indicates that fifteen relationships can exist, representing: A existing alone, B existing alone, C existing alone, D existing alone, A and B existing simultaneously, A and C existing simultaneously, A and D existing simultaneously, C and B existing simultaneously, D and B existing simultaneously, C and D existing simultaneously, A, B, and C existing simultaneously, A, B, and D existing simultaneously, A, C, and D existing simultaneously, and A, B, C, and D existing simultaneously.

[0092] It should be noted that the dimensions of layers and regions may be exaggerated in the accompanying drawings for clarity. Furthermore, it is understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or there may be intermediate layers. Additionally, it is understood that when an element or layer is referred to as being "below" another element or layer, it can be directly below the other element, or there may be more than one intermediate layer or element. Furthermore, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or there may be more than one intermediate layer or element. Similar reference numerals throughout indicate similar elements.

[0093] In this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0094] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A projection screen, characterized in that, The projection screen includes: a projection screen, a supporting structure layer, and a roll assembly; The projection screen and one end of the supporting structure layer are connected to the roll assembly, and the supporting structure layer is located on the back of the projection screen, while the front of the projection screen has a light-receiving area. The support structure layer includes a flexible base layer and a plurality of rigid support strips located on the side of the flexible base layer away from the projection screen. The support strips extend along a first direction, and at least a portion of the orthogonal projection of the support strips on the projection screen is located within the light-receiving area. The first direction is a direction parallel to the axis of the roll assembly. The supporting structure layer further includes a first magnetic structure located on the flexible substrate layer, and the projection screen includes a projection screen layer and a second magnetic structure located on the side of the projection screen layer facing the supporting structure layer, wherein the first magnetic structure and the second magnetic structure are attracted to each other. The first magnetic structure is located on the side of the flexible substrate away from the projection screen; The supporting structure layer also includes a mesh-like filament structure; The flexible substrate has mesh-like grooves, and the mesh-like filament structure is located in the mesh-like grooves on the flexible substrate. The flexible substrate layer includes a substrate layer, a reinforcing layer, and an elastic layer, wherein the reinforcing layer covers the substrate layer and the elastic layer covers the reinforcing layer; At the two edges of the support structure layer in the lateral direction, the magnetism of the first magnetic structure is stronger than that of other areas, where the lateral direction refers to the direction parallel to the axis of the roll assembly.

2. The projection screen according to claim 1, characterized in that, The first magnetic structure includes multiple magnetic strips; The plurality of magnetic strips and the plurality of support strips are arranged in multiple strip groups on the flexible substrate, and each strip group includes at least one magnetic strip and at least one support strip.

3. The projection screen according to claim 2, characterized in that, Each of the said bar groups includes one of the magnetic bars and one of the support bars.

4. The projection screen according to claim 1, characterized in that, The support strip is made of magnetic material, and the plurality of support strips are reused as the first magnetic structure; Alternatively, the first magnetic structure may be a magnetic layer located on the flexible substrate.

5. The projection screen according to any one of claims 1 to 4, characterized in that, The support strip is bonded to the flexible base layer; Alternatively, the support structure layer may further include a plurality of fixed structures located on the flexible substrate layer, with the support strip located on the fixed structures; Alternatively, the support structure layer may further include a cover layer, with the plurality of support strips located between the cover layer and the flexible base layer.

6. The projection screen according to any one of claims 1 to 4, characterized in that, The material of the support strip includes at least one of carbon fiber, glass fiber, aluminum alloy, polycarbonate, and polyethylene terephthalate.

7. The projection screen according to any one of claims 1 to 4, characterized in that, The roll assembly includes a first roll, and one end of the projection screen and one end of the support structure layer are both connected to the first roll. Alternatively, the roll assembly includes a second roll and a third roll, with one end of the projection screen connected to the second roll and one end of the support structure layer connected to the third roll.

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