Projection screen and projection device

Abstract

The application discloses a projection screen and a projection device, and belongs to the technical field of projection. The projection screen comprises a projection curtain, a roller blind assembly and a roller assembly. The roller blind assembly comprises a plurality of roller blind pieces which are sequentially and movably connected in a direction away from the roller assembly. At least one of the plurality of roller blind pieces is a flexible roller blind piece. The roller blind assembly can support the projection curtain, so as to reduce the possibility of edge curling of the projection curtain. The flexible roller blind piece comprises a flexible structure. Therefore, part of the roller blind pieces in the roller blind assembly has flexibility. When the projection curtain is curled, the wear and extrusion force of the roller blind pieces on the projection curtain are reduced. The problem that the projection screen is easily damaged in the prior art is solved, and the protection effect of the projection screen is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of projection technology, in particular to a projection screen and a projection device. BACKGROUND

[0002] The projection screen is a device for receiving the image screen projected by the projector.

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

[0004] However, the above-mentioned projection screen is easy to squeeze the curtain when it is rolled up, which can cause damage to the projection screen. SUMMARY

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

[0006] According to an aspect of the present application, a projection screen is provided, which includes a projection curtain, a roller blind assembly and a winding drum assembly.

[0007] One end of the projection curtain and one end of the roller blind assembly are connected to the winding drum assembly, and the roller blind assembly is located on the back of the projection curtain.

[0008] The roller blind assembly includes a plurality of roller blind pieces connected in sequence in a direction away from the winding drum assembly, at least one of the plurality of roller blind pieces is a flexible roller blind piece, and at least a part of the flexible roller blind piece is a flexible structure.

[0009] Optionally, the flexible roller blind piece includes a roller blind piece main body structure and two connection structures respectively located at both ends of the roller blind piece main body structure, at least one of the roller blind piece main body structure and the two connection structures is a flexible structure including a flexible material, and at least one structure is a hard structure including a hard material.

[0010] Optionally, the roller blind piece main body structure of the flexible roller blind piece is a hard structure, and the two connection structures of the flexible roller blind piece are flexible structures.

[0011] Alternatively, the roller blind piece main body structure of the flexible roller blind piece is a flexible structure, and the two connection structures of the flexible roller blind piece are hard structures.

[0012] Optionally, the flexible roller blind sheet has a hard structure, and one of the two connecting structures has a hard structure, and the other has a flexible structure.

[0013] Optionally, the plurality of roller blind sheets comprises a plurality of roller blind sheet groups, each roller blind sheet group comprises at least two roller blind sheets connected together, and each roller blind sheet group comprises at least one flexible roller blind sheet and at least one hard roller blind sheet, the flexible roller blind sheet is made of a flexible material, and the hard roller blind sheet is made of a hard material.

[0014] Optionally, each roller blind sheet group comprises two roller blind sheets connected together, and each roller blind sheet group comprises one flexible roller blind sheet and one hard roller blind sheet.

[0015] Optionally, the flexible material comprises at least one of silica gel, thermoplastic elastomer, thermoplastic polyurethane rubber, polyvinyl chloride modified soft rubber, and polyvinyl chloride modified rubber.

[0016] The hard material comprises at least one of acrylonitrile-butadiene-styrene copolymer, carbon fiber, aluminum alloy, polycarbonate, and polyvinyl chloride.

[0017] Optionally, the projection screen further comprises at least one limiting component, the limiting component comprises a limiting rope and limiting holes on the plurality of roller blind sheets, the limiting holes on the plurality of roller blind sheets are oppositely arranged, and the limiting rope passes through the limiting holes on the plurality of roller blind sheets.

[0018] Optionally, the projection screen further comprises a first magnetic structure and a second magnetic structure, the first magnetic structure is located on the roller blind assembly, the second magnetic structure is located on a side of the projection curtain facing the roller blind assembly, and the first magnetic structure and the second magnetic structure are mutually adsorbed.

[0019] According to another aspect of the embodiments of the present application, a projection device is provided, which comprises a projector and the projection screen.

[0020] The technical scheme provided by the embodiments of the present application has at least the following beneficial effects:

[0021] Provided is a projection screen comprising a projection curtain, a roller blind assembly and a roller assembly, wherein the roller blind assembly comprises a plurality of roller blind pieces sequentially and movably connected in a direction away from the roller assembly, and at least one of the plurality of roller blind pieces is a flexible roller blind piece, the roller blind assembly can support the projection curtain to reduce the possibility of edge curling of the projection curtain, and at least part of the flexible roller blind piece is a flexible structure, so that part of the roller blind pieces of the roller blind assembly has a certain flexibility, thereby reducing the wear and extrusion force of the roller blind pieces on the projection curtain when the projection curtain is curled, solving the problem of easy damage of the projection screen in the related art, and improving the protection effect of the projection screen.

[0022] In addition, since the extrusion force of the roller blind pieces on the projection curtain is reduced, the appearance of indentation on the projection curtain can be avoided, thereby improving the display effect of the projection screen.

[0023] In addition, part of the roller blind pieces of the roller blind assembly has a certain flexibility, thereby improving the curling ability of the roller blind assembly, reducing the curling radius of the projection screen, and reducing the volume of the roller assembly, which is conducive to the miniaturization of the projection screen. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 is a structural schematic diagram of a projection screen;

[0026] Figure 2 is a structural schematic diagram of another projection curtain;

[0027] Figure 3 is a structural schematic diagram of a projection screen provided by an embodiment of the present application;

[0028] Figure 4 is Figure 3 is a right view of the projection curtain shown in FIG. 8;

[0029] Figure 5 is a structural schematic diagram of a projection screen provided by an embodiment of the present application;

[0030] Figure 6 is Figure 5 is an enlarged structural schematic diagram of part of the projection screen shown in FIG. 9;

[0031] Figure 7is a structural schematic diagram of a flexible roller blind sheet in a projection screen provided by an embodiment of the present application.

[0032] Figure 8 is a structural schematic diagram of a flexible roller blind sheet in a projection screen provided by an embodiment of the present application.

[0033] Figure 9 is a structural schematic diagram of another projection screen provided by an embodiment of the present application.

[0034] Figure 10 is Figure 9 is an enlarged structural schematic diagram of a partial area of the projection screen.

[0035] Figure 11 is a structural schematic diagram of another projection screen provided by an embodiment of the present application.

[0036] Figure 12 is a structural schematic diagram of another projection screen provided by an embodiment of the present application.

[0037] Figure 13 is a structural schematic diagram of another projection screen provided by an embodiment of the present application.

[0038] Figure 14 is Figure 13 is a left view structural schematic diagram of a roller blind sheet in the projection screen.

[0039] Figure 15 is a structural schematic diagram of another projection screen provided by an embodiment of the present application.

[0040] Figure 16 is a structural schematic diagram of another projection screen provided by an embodiment of the present application.

[0041] Figure 17 is a structural schematic diagram of a projection device provided by an embodiment of the present application.

[0042] The specific embodiments of the present application have been shown in the above-described drawings, and will be described in more detail hereinafter. The drawings and the written description are not intended to limit the scope of the present application in any way, but to explain the present application to those skilled in the art by reference to a particular embodiment. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the present application more clear, the embodiments of the present application will be described in more detail below with reference to the drawings.

[0044] A projection screen is a device for receiving an image screen projected by a projector. In order to improve the ease of use of the projection screen, a projection screen that can be accommodated in a roller is currently used. As shown in Figure 1 ​Figure 1 is a structural schematic diagram of a projection screen, the projection screen comprises a beam 11, a winding drum 12 and a flexible curtain 13, the beam 11 is arranged at an upper edge of the curtain 13, the winding drum 12 is located at a lower edge of the curtain 13, the winding drum 12 and the beam 11 can tension the curtain 13, the tension of the central area 131 of the curtain 13 in each direction is basically equal, so that the central area 131 has high flatness, but the areas deviating from the center of the curtain 131 are not equal in stress in different directions, especially in the left and right edge areas 132 without external force, which leads to unbalanced stress of the left and right edge areas 132, and such unbalance will cause the curtain to shrink inward, curl and wrinkle and other problems, which affects the display effect of the projection curtain.

[0045] In order to solve the problem of uneven edges of the curtain, a projection screen can be as shown in Figure 2 Figure 2 is a structural schematic diagram of another projection screen Figure 2 may be a side view of the projection screen, the viewing angle can be parallel to the surface of the curtain, the projection screen comprises a curtain 21, a winding curtain 22 and a winding drum 23, the back of the curtain 21 (the curtain can comprise opposite front and back, and the front is the side bearing the image picture) is attached to the winding curtain 22, and one end of the curtain 21 and the winding curtain 22 is connected to the winding drum 23, so as to be stored on the winding drum 23, the winding curtain 22 comprises a plurality of metal winding curtain pieces 221, the plurality of metal winding curtain pieces 221 are connected end to end, which can be used to support the curtain 21 to avoid curling of the edges of the curtain 21.

[0046] However, when the above-mentioned projection screen is curled (such as when it is curled and stored in the winding drum 23), due to the high hardness of the metal winding curtain pieces 221, the metal winding curtain pieces can wear the curtain, causing indentation of the curtain, which leads to poor display effect of the curtain when bearing the image picture, and even can cause damage to the curtain and cannot be used normally. In order to avoid the occurrence of the problem, one solution is to provide corresponding components at the winding drum when the projection screen is curled, so that there is a certain spacing between the metal winding curtain pieces of different layers, but under such structure, the size of the winding drum is larger, which increases the space occupied by the projection screen, which is not conducive to the miniaturization of the projection screen.

[0047] The embodiments of the present application provide a projection screen, which can solve some problems in the related art.

[0048] Figure 3 is a structural schematic diagram of a projection screen provided by the embodiments of the present application, Figure 4 is Figure 3 is a right view of the projection curtain shown in Figure 3 and Figure 4 ​The projection screen 30 comprises a projection curtain 31, a roller assembly 32 and a roller drum assembly 33.

[0049] One end of the projection curtain 31 and one end of the roller assembly 32 are connected with the roller drum assembly 33, and the roller assembly 32 is located at the back of the projection curtain 31.

[0050] The roller assembly 32 comprises a plurality of roller pieces 321 which are sequentially and movably connected in a direction f1 away from the roller drum assembly 33, at least one of the plurality of roller pieces 321 is a flexible roller piece, and at least a part of the flexible roller piece is a flexible structure.

[0051] It should be noted that the projection screen provided by the embodiments of the present application can comprise an unfolded state and a storage state, wherein the unfolded state refers to a state that the projection curtain 31 and the roller assembly 32 are unfolded outside the roller drum assembly 33 without being curled and wound on the roller drum assembly 33, and the storage state refers to a state that the projection curtain 31 and the roller assembly 32 are curled and wound on the roller drum assembly 33, and the direction f1 of the plurality of roller pieces 321 which are sequentially and movably connected in a direction away from the roller drum assembly in the roller assembly 32 refers to a direction when the projection curtain 31 and the roller assembly 32 are in the unfolded state.

[0052] In summary, the embodiments of the present application provide a projection screen comprising a projection curtain, a roller assembly and a roller drum assembly, wherein the roller assembly comprises a plurality of roller pieces which are sequentially and movably connected in a direction away from the roller drum assembly, and at least one of the plurality of roller pieces is a flexible roller piece, the roller assembly can support the projection curtain to reduce the possibility of curling of the edge of the projection curtain, and at least a part of the flexible roller piece is a flexible structure, so that part of the roller pieces of the roller assembly has a certain flexibility, thereby reducing the wear and extrusion force of the projection curtain by the roller pieces when the projection curtain is curled, solving the problem that the projection screen is easily damaged in the related art, and improving the protection effect of the projection screen.

[0053] In addition, since the extrusion force of the projection curtain by the roller pieces is reduced, the appearance of indentation on the projection curtain can be avoided, thereby improving the display effect of the projection screen.

[0054] In addition, part of the roller pieces of the roller assembly has a certain flexibility, thereby improving the curling ability of the roller assembly, reducing the curling radius of the projection screen, and reducing the volume of the roller drum assembly, which is conducive to the miniaturization of the projection screen.

[0055] In the embodiments of the present application, the roller blind assembly included in the projection screen can be a soft and hard combined roller blind assembly, that is, the roller blind assembly includes a hard structure and a flexible structure. Such a soft and hard combined roller blind assembly can reduce damage to the projection screen and improve the bending performance of the roller blind assembly, so as to facilitate the miniaturization of the projection screen.

[0056] In the embodiments of the present application, the soft and hard combined roller blind assembly can have various structures, which will be described below.

[0057] In one scheme, part of the structure of the roller blind sheet in the roller blind assembly can be a flexible structure, and another part of the structure can be a hard structure. Please refer to Figure 5 , Figure 5 is a structural schematic view of a projection screen provided by the embodiments of the present application, Figure 6 is Figure 5 is an enlarged structural schematic view of a partial area of the projection screen shown in Figure 5 , please refer to Figure 5 and Figure 6 , the projection screen has been adjusted on the basis of the projection screen shown in Figure 4 , wherein the flexible roller blind sheet 321a includes a roller blind sheet main structure a1 and two connection structures a2 respectively located at both ends of the roller blind sheet main structure a1, at least one of the roller blind sheet main structure a1 and the two connection structures a2 is a flexible structure including a flexible material, and at least one of the roller blind sheet main structure a1 and the two connection structures a2 is a hard structure including a hard material. In this scheme, the flexible roller blind sheet 321a can be a soft and hard combined roller blind sheet. In this way, the support of the flexible roller blind sheet 321a to the projection screen 31 can be ensured on the basis of improving the flexibility of the flexible roller blind sheet 321a, so that the projection screen 31 can maintain a high flatness, especially the flatness of the edge area of the projection screen.

[0058] In an exemplary embodiment, the flexible material includes at least one of silicone, thermoplastic elastomer (TPE), thermoplastic polyurethane (TPU), polyvinyl chloride (PVC) modified soft rubber, and polyvinyl chloride modified rubber.

[0059] The hard material includes at least one of acrylonitrile-butadiene-styrene copolymer, carbon fiber, aluminum alloy, polycarbonate (PC), and polyvinyl chloride.

[0060] Of course, the aforementioned flexible and rigid materials may also include other materials in the art, and the embodiments of this application do not limit this.

[0061] In a flexible roller blind slat, the main structure a1 is a rigid structure, one of the two connecting structures a2 is a rigid structure, and the other connecting structure a2 is a flexible structure. For example, as shown... Figure 6 In the flexible roller shutter slat 321a shown, one of the two connecting structures a2 is a circular structure. Figure 6 The lower connecting structure of the flexible roller blind slat is a circular structure, which can be either a ball-shaped structure or a cylindrical structure. The other connecting structure is a C-shaped opening structure. Figure 6 The connecting structure at the upper end of the flexible roller shutter slat is a circular structure, where the circular structure can be flexible, while the C-shaped opening structure and the main body structure a1 are rigid structures. This structure also means that one end of the flexible roller shutter slat is flexible, allowing it to bend along with the roller shutter assembly when it bends, improving the bending performance of the roller shutter assembly, reducing the bending radius of the roller shutter assembly, and facilitating the miniaturization of the projection screen.

[0062] Specifically, in a type of flexible roller blind slat, such as Figure 7 As shown, Figure 7 This is a schematic diagram of the structure of a flexible roller shutter slat in a projection screen provided in this application embodiment. The main structure a1 of the roller shutter slat is a rigid structure, while the two connecting structures a2 within the flexible roller shutter slat are flexible structures. That is, the main structure a1 of the flexible roller shutter slat in the middle is a rigid structure, while the connecting structures a2 at both ends, used for connecting with other roller shutter slats, are flexible structures. With this structure, the two ends of the flexible roller shutter slat are flexible, allowing it to bend along with the roller shutter assembly when it bends. This improves the bending performance of the roller shutter assembly, reduces the bending radius of the roller shutter assembly, and facilitates the miniaturization of the projection screen (this miniaturization can refer to the miniaturization of the projection screen in its retracted state). Furthermore, it reduces the pressure exerted by the roller shutter assembly on the projection screen in the retracted state, lowering the risk of damage to the projection screen and extending the lifespan of the projection screen.

[0063] In addition, due to the greater friction of the flexible structure, this structure increases the friction between the connecting structure of the flexible roller blind slat and the connecting structure of the connected roller blind slat (the roller blind slat connected to the flexible roller blind slat can be a flexible roller blind slat, or the roller blind slat connected to the flexible roller blind slat can be a rigid roller blind slat), reducing the possibility of the two roller blind slats shifting laterally (this lateral direction can refer to the direction parallel to the axis of the roller assembly).

[0064] It should be noted that the flexible structure involved in the embodiments of this application can refer to a structure whose manufacturing material includes the aforementioned flexible material; correspondingly, the rigid structure involved in the embodiments of this application can refer to a structure whose manufacturing material includes the aforementioned rigid material. Based on this, the flexibility of the flexible structure is greater than that of the rigid structure, and the hardness of the rigid structure is greater than that of the flexible structure.

[0065] In another type of flexible roller blind slat, such as Figure 8 As shown, Figure 8 This is a schematic diagram of the structure of a flexible roller shutter in a projection screen provided in this application embodiment. The main roller shutter structure a1 is a flexible structure, while the two connecting structures a2 are rigid structures. That is, the connecting structures a2 at both ends of the flexible roller shutter are rigid structures, while the main roller shutter structure a1 in the middle is a flexible structure. With this structure, the main roller shutter structure a1 in the middle can bend along with the roller shutter assembly, improving the bending performance of the roller shutter assembly, reducing the bending radius of the roller shutter assembly, which is beneficial for the miniaturization of the projection screen. Furthermore, it can reduce the pressure exerted by the roller shutter assembly on the projection screen when it is retracted, reducing the risk of damage to the projection screen and extending the service life of the projection screen.

[0066] In the above embodiments, various flexible roller blind structures are provided. When the roller blind assembly of the projection screen provided in this application embodiment includes multiple flexible roller blinds, these multiple flexible roller blinds may include at least one of the above-mentioned multiple flexible roller blinds. That is, the structures of the multiple flexible roller blinds in the roller blind assembly are the same, or the structures of the multiple flexible roller blinds in the roller blind assembly may not be completely the same.

[0067] In one exemplary embodiment, each slat of the roller blind assembly can be the aforementioned flexible slat, and each slat is a combination of soft and rigid slats, which can improve the overall bending performance of the roller blind assembly and reduce the possibility of each slat damaging the projection screen.

[0068] It should be noted that when not all roller blind slats in the roller blind assembly provided in this application embodiment are flexible roller blind slats, the other roller blind slats besides the flexible roller blind slats can be rigid roller blind slats made of rigid materials.

[0069] In another option, such as Figure 9 As shown, Figure 9 This is a schematic diagram of another projection screen structure provided in an embodiment of this application. Figure 10 yes Figure 9 The diagram shows an enlarged view of a portion of the projection screen. Figure 10 yes Figure 9 (See the enlarged structural diagram of region q2 in the middle region). Please refer to... Figure 9 and Figure 10Wherein, the plurality of curtain pieces comprises a plurality of curtain piece groups g, each curtain piece group g comprises at least two curtain pieces connected, and each curtain piece group g comprises at least one flexible curtain piece 321a and at least one hard curtain piece 321b, the flexible curtain piece 321a is composed of a flexible material, and the hard curtain piece 321b is composed of a hard material.

[0070] In this structure, among the plurality of curtain pieces in the curtain assembly, part of the curtain pieces are flexible curtain pieces 321a, and part of the curtain pieces are hard curtain pieces 321b, and the flexible curtain pieces 321a are distributed at a plurality of positions in the curtain assembly, so that each position of the curtain assembly can have flexibility, and the overall flexibility of the curtain assembly is improved.

[0071] In an exemplary embodiment, the curtain piece group g comprises two curtain pieces connected, and each curtain piece group g comprises one flexible curtain piece 321a and one hard curtain piece 321b. In this structure, the flexible curtain piece 321a and the hard curtain piece 321b are arranged at intervals in the curtain assembly, so that the uniformity of the distribution of the flexible curtain piece 321a in the curtain assembly can be improved, so that each position and each area of the curtain assembly can have a certain flexibility, further avoiding the possibility of the curtain assembly damaging the projection screen, and improving the protection effect of the curtain assembly on the projection screen.

[0072] Of course, each curtain piece group g can also include a larger number of curtain pieces, and correspondingly, the flexible curtain piece 321a and the hard curtain piece 321b in each curtain piece group g can also be other numbers, for example, Figure 11 As shown in Figure 11 is another structure diagram of a projection screen provided by the embodiment of the present application, wherein each curtain piece group g can include three curtain pieces, and each curtain piece group g includes two flexible curtain pieces 321a and one hard curtain piece 321b; as shown in Figure 12 As shown in Figure 12 is another structure diagram of a projection screen provided by the embodiment of the present application, wherein each curtain piece group g can include four curtain pieces, and each curtain piece group g includes two flexible curtain pieces 321a and two hard curtain pieces 321b.

[0073] It should be noted that the above embodiments provide two structures of the curtain assembly, wherein in the first curtain assembly, each curtain piece can be a flexible curtain piece, and in the other curtain assembly, a plurality of hard curtain pieces and a plurality of flexible curtain pieces can be included, and the hard curtain pieces and the flexible curtain pieces can be arranged at intervals.

[0074] Correspondingly, the above embodiments also provide two kinds of flexible curtain pieces. In the first kind of flexible curtain piece, the flexible curtain piece includes a curtain piece main structure and at least one of the two connecting structures is a flexible structure including a flexible material, that is, part of the structure of the flexible curtain piece is a flexible structure and part of the structure is a rigid structure. In the second kind of flexible curtain piece, the whole flexible curtain piece is a flexible structure made of a flexible material. It should be noted that the structure of the flexible curtain piece in the second kind of flexible curtain piece can also be the same as that of the flexible curtain piece in the first kind of flexible curtain piece, that is, the present application also provides a projection screen, in which the curtain assembly includes a plurality of curtain pieces, the plurality of curtain pieces include a plurality of curtain piece groups, the curtain piece group includes at least two connected curtain pieces, and each curtain piece group includes at least one flexible curtain piece and at least one rigid curtain piece. For example, each curtain piece group can include one flexible curtain piece and one rigid curtain piece.

[0075] In the flexible curtain piece, the curtain piece main structure is a rigid structure, and the two connecting structures of the flexible curtain piece are flexible structures. Because the friction of the flexible structure is large, the friction between the connecting structure of the flexible curtain piece and the connecting structure of the connected curtain piece is increased, and the possibility of lateral deviation of the two curtain pieces is reduced. In another flexible curtain piece, the curtain piece main structure of the flexible curtain piece is a flexible structure, and the two connecting structures of the flexible curtain piece are rigid structures.

[0076] Specifically, in one flexible curtain piece, the curtain piece main structure is a rigid structure, and the two connecting structures of the flexible curtain piece are flexible structures. Because the friction of the flexible structure is large, the friction between the connecting structure of the flexible curtain piece and the connecting structure of the connected curtain piece is increased, and the possibility of lateral deviation of the two curtain pieces is reduced. In another flexible curtain piece, the curtain piece main structure of the flexible curtain piece is a flexible structure, and the two connecting structures of the flexible curtain piece are rigid structures.

[0077] In an exemplary embodiment, as shown in Figure 13 , the projection screen includes a plurality of curtain pieces, the plurality of curtain pieces include a plurality of curtain piece groups, the curtain piece group includes at least two connected curtain pieces, and each curtain piece group includes at least one flexible curtain piece and at least one rigid curtain piece. For example, each curtain piece group can include one flexible curtain piece and one rigid curtain piece. Figure 13is another structural schematic view of a projection screen provided by the embodiment of the present application, and the projection screen further comprises at least one limiting assembly 34, the limiting assembly 34 comprises a limiting rope 341 and limiting holes 342 located on the plurality of roller blind pieces 321, the limiting holes 342 on the plurality of roller blind pieces 321 are oppositely arranged, and the limiting rope 341 passes through the limiting holes 342 on the plurality of roller blind pieces 321. The limiting rope 341 cooperates with the limiting holes 342, which can be used to limit the relative displacement of the plurality of roller blind pieces 321 in the transverse direction, and can make the plurality of roller blind pieces always keep in the aligned state during the use of the roller blind assembly. In addition, the limiting assembly 34 does not increase the width of the edge of the roller blind assembly, and has less influence on the roller blind assembly. The limiting rope 341 can be a strip structure, a wire structure or a rope structure, and the embodiment of the present application does not make any limitation.

[0078] Figure 14 is Figure 13 the left view structural schematic view of the roller blind piece in the projection screen shown in Figure 13 and Figure 14 , wherein the connecting structure of one end of the roller blind piece 321 comprises a c-shaped port c, and the connecting structure of the other end comprises a columnar structure j. Through this structure, the plurality of roller blind pieces can be connected end to end to form a roller blind assembly. However, in this connecting structure, the two adjacent roller blind pieces 321 are prone to shift and dislocate in the transverse direction (perpendicular to the paper surface in Figure 14 , the transverse direction is the horizontal direction in Figure 13 ), which may result in that the roller blind assembly cannot effectively support the projection screen, and further result in that the flatness of the projection screen is reduced, and the edge of the projection screen is curled. One solution is to increase the limiting structure such as limiting screw or limiting piece on the edge of the roller blind piece. However, the limiting structure may increase the width of the roller blind as a whole, affect the appearance, and affect the smoothness of the curling and unfolding of the roller blind. In addition, the limiting structure may also be abnormally noisy due to wear, and has the risk of loosening. In the embodiment of the present application, the limiting assembly comprising the limiting rope 341 and the limiting holes 342 located on the plurality of roller blind pieces 321 can limit the roller blind piece 321, avoid the dislocation of the roller blind piece, and has simple, stable and beautiful structure, and does not increase the width of the roller blind assembly, thereby improving the stability of the projection screen provided by the embodiment of the present application.

[0079] In an exemplary embodiment, as shown in Figure 15 , Figure 15is a structural schematic diagram of another projection screen provided by an embodiment of the present application, wherein the projection screen further comprises a first magnetic structure m1 and a second magnetic structure m2, the first magnetic structure m1 is located on the roller blind assembly 32, the second magnetic structure m2 is located on a side of the projection curtain 31 facing the roller blind assembly 32, and the first magnetic structure m1 and the second magnetic structure m2 are mutually adsorbed. The first magnetic structure m1 can have various structures and various positions, for example, in one projection screen, the first magnetic structure m1 can be a magnetic layer, which can be attached to the roller blind assembly 32, for example, can be attached to a side of the first magnetic structure m1 away from the projection curtain 31. In this structure, the first magnetic structure m1 can avoid direct contact with the second magnetic structure m2 on the projection curtain 31, reducing the possibility of the first magnetic structure m1 damaging the projection screen 31, and improving the protection effect on the projection curtain 31. In this structure, the roller blind assembly can be made of a material that does not affect the mutual adsorption of the first magnetic structure m1 and the second magnetic structure m2.

[0080] Of course, the first magnetic structure m1 can also be attached to a side of the roller blind assembly 32 facing the projection curtain 31, which is not limited by the embodiments of the present application.

[0081] In addition, the first magnetic structure m1 can include a plurality of magnetic strips, which can be arranged in sequence on the roller blind assembly 32 in a direction f2 away from the roller assembly 33.

[0082] In an exemplary embodiment, the first magnetic structure m1 can also be arranged in the roller blind assembly 32, that is, the magnetic material can be mixed in the roller blind sheet of the roller blind assembly 32, or part of the structure in the roller blind sheet can be made of magnetic material, for example, the roller blind sheet can include a roller blind sheet main structure and two connecting structures respectively located at both ends of the roller blind sheet main structure, at least one of the roller blind sheet main structure and the two connecting structures is a flexible structure including a flexible material, and at least one structure is a hard structure including a hard material, wherein the hard structure can be a structure composed of magnetic material, for example, the roller blind sheet main structure can be a hard structure with magnetism, and the two connecting structures can be flexible structures including flexible material.

[0083] In another exemplary embodiment, the plurality of roller blind sheets include a plurality of roller blind sheet groups, each roller blind sheet group includes at least two connected roller blind sheets, and each roller blind sheet group includes at least one flexible roller blind sheet and at least one hard roller blind sheet, the flexible roller blind sheet 321a is composed of a flexible material, and the hard roller blind sheet 321b is composed of a hard material with magnetism.

[0084] In addition, the second magnetic structure m2 can be a magnetic layer, which can be attached to the back of the projection curtain 31. Of course, the second magnetic structure m2 can also be other structures and be arranged on the back of the projection curtain 31 by other manners, which are not limited in the embodiments of the present application.

[0085] In the projection screen provided by the above embodiments, the winding drum assembly 33 includes a first winding drum, and one end of the projection curtain 31 and one end of the roller blind assembly 32 are connected to the first winding drum. In this structure, the projection curtain 31 and the roller blind assembly 32 can be wound and stored in the same first winding drum. This structure has the advantages of simple structure and small size.

[0086] As shown in FIG. 1, Figure 16 Figure 16 is a structural schematic diagram of another projection screen provided by the embodiments of the present application. In this projection screen, the winding drum assembly 33 includes a second winding drum 332 and a third winding drum 333 (the axis of the second winding drum 332 can be parallel to the axis of the third winding drum 333), one end of the projection curtain 31 is connected to the second winding drum 332, and one end of the roller blind assembly 32 is connected to the third winding drum 333. In this structure, the projection curtain 31 and the roller blind assembly 32 can be wound and stored in two different winding drums respectively. This structure can avoid damage to the projection curtain 31 caused by the roller blind assembly 32 after winding, and improve the protection effect on the projection curtain 31.

[0087] In an exemplary embodiment, the projection screen provided by the embodiments of the present application can further include a cross beam, which can be located at the other end of the projection screen opposite to the winding drum assembly and can be used to support the end of the projection screen.

[0088] In summary, the embodiments of the present application provide a projection screen including a projection curtain, a roller blind assembly and a winding drum assembly. The roller blind assembly includes a plurality of roller blind pieces connected in sequence in the direction away from the winding drum assembly, and at least one of the plurality of roller blind pieces is a flexible roller blind piece. The roller blind assembly can support the projection curtain to reduce the possibility of edge winding of the projection curtain. At least a part of the flexible roller blind piece is a flexible structure, so that part of the roller blind pieces of the roller blind assembly has a certain flexibility. When the projection curtain is wound, the wear and extrusion force of the roller blind piece on the projection curtain can be reduced, the problem of easy damage of the projection screen in the related art is solved, and the protection effect on the projection screen is improved.

[0089] In addition, since the extrusion force of the roller blind piece on the projection curtain is reduced, the appearance of indentation on the projection curtain can be avoided, and the display effect of the projection screen is improved.

[0090] ​In addition, the flexible curtain pieces in the curtain assembly can improve the curling ability of the curtain assembly, reduce the curling radius of the projection screen, and reduce the size of the spool assembly, thereby facilitating the miniaturization of the projection screen.

[0091] As shown in Figure 17 , Figure 17 is a structural schematic diagram of a projection device provided by an embodiment of the present application. The projection device includes a projector 40 and any one of the projection screens 30 provided by the above embodiments.

[0092] In the application of the projection device, the projection screen 30 can be pulled out of the spool assembly 33 and fixed, and then the projector 41 can be started to project an image on the projection screen 31. Since the curtain assembly 32 can improve the flatness of the projection screen 31, especially the flatness of the edges of the projection screen 31, the possibility of inward contraction, edge curling and wrinkling of the edges of the projection screen 31 is reduced, and the image can be displayed on the projection screen with high flatness, thereby improving the display effect of the image.

[0093] In the application of the projection device, the projection screen 30 can be pulled out of the spool assembly 33 and fixed, and then the projector 41 can be started to project an image on the projection screen 31. Since the curtain assembly 32 can improve the flatness of the projection screen 31, especially the flatness of the edges of the projection screen 31, the possibility of inward contraction, edge curling and wrinkling of the edges of the projection screen 31 is reduced, and the image can be displayed on the projection screen with high flatness, thereby improving the display effect of the image.

[0094] In an exemplary embodiment, the projector 40 can be an ultra-short focus projector, which can shorten the distance between the projector 40 and the projection screen 30, thereby facilitating the miniaturization of the projection device.

[0095] In conclusion, the embodiment of the present application provides a projection device, comprising a projector and a projection screen, the projection screen comprises a projection curtain, a roller blind assembly and a roller assembly, the roller blind assembly comprises a plurality of roller blind pieces which are sequentially and movably connected in a direction away from the roller assembly, and at least one of the plurality of roller blind pieces is a flexible roller blind piece, the roller blind assembly can support the projection curtain to reduce the possibility of edge curling of the projection curtain, and at least part of the flexible roller blind piece is a flexible structure, so that part of the roller blind pieces in the roller blind assembly has a certain flexibility, thereby reducing the wear and extrusion force of the projection curtain on the projection curtain when the projection curtain is curled, solving the problem of easy damage of the projection screen in the related art, and improving the protection effect of the projection screen.

[0096] In addition, since the extrusion force of the roller blind piece on the projection curtain is reduced, the appearance of indentation on the projection curtain can be avoided, thereby improving the display effect of the projection screen.

[0097] In addition, part of the roller blind pieces in the roller blind assembly has a certain flexibility, thereby improving the curling ability of the roller blind assembly, reducing the curling radius of the projection screen, and reducing the volume of the roller assembly, which is beneficial to the miniaturization of the projection screen.

[0098] In the present application, the term "at least one of A and B" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, at least one of A and B can mean that A exists alone, A and B exist together, and B exists alone. Similarly, "at least one of A, B and C" means that there can be seven relationships, which can mean that A exists alone, B exists alone, C exists alone, A and B exist together, A and C exist together, C and B exist together, and A, B and C exist together. Similarly, "at least one of A, B, C and D" means that there can be fifteen relationships, which can mean that A exists alone, B exists alone, C exists alone, D exists alone, A and B exist together, A and C exist together, A and D exist together, C and B exist together, D and B exist together, C and D exist together, A, B and C exist together, A, B and D exist together, A, C and D exist together, B, C and D exist together, and A, B, C and D exist together.

[0099] In the present application, the terms "first", "second", "third" are only for descriptive purposes, and cannot be understood or implied as indicating or implying relative importance. The term "a plurality of" means two or more, unless otherwise explicitly limited.

[0100] The above merely provides the optional embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A projection screen, characterized in that, The projection screen includes: a projection screen, a roller blind assembly, and a roller assembly; One end of the projection screen and one end of the roller blind assembly are both connected to the roller assembly, and the roller blind assembly is located on the back of the projection screen. The roller blind assembly includes a plurality of roller blind slats that are sequentially and movably connected in a direction away from the roller assembly, at least one of the plurality of roller blind slats being a flexible roller blind slat, and at least a portion of the flexible roller blind slat having a flexible structure. The flexible roller blind slat includes a main roller blind structure and two connecting structures located at both ends of the main roller blind structure. At least one of the main roller blind structure and the two connecting structures is a flexible structure comprising a flexible material, and at least one structure is a rigid structure comprising a rigid material. Alternatively, the plurality of roller blind slats includes a plurality of roller blind slat groups. Each roller blind slat group includes at least two roller blind slats connected together, and each roller blind slat group includes at least one flexible roller blind slat and at least one rigid roller blind slat. The flexible roller blind slat is made of a flexible material, and the rigid roller blind slat is made of a rigid material.

2. The projection screen according to claim 1, characterized in that, In the case where the flexible roller blind includes a main roller blind structure and two connecting structures located at both ends of the main roller blind structure, the main roller blind structure in the flexible roller blind is a rigid structure, and the two connecting structures in the flexible roller blind are flexible structures. Alternatively, the main structure of the flexible roller shutter slat is a flexible structure, while the two connecting structures in the flexible roller shutter slat are rigid structures.

3. The projection screen according to claim 1, characterized in that, In the case where the flexible roller blind includes a main roller blind structure and two connecting structures located at both ends of the main roller blind structure, the main roller blind structure of the flexible roller blind is a rigid structure, one of the two connecting structures is a rigid structure, and the other connecting structure is a flexible structure.

4. The projection screen according to claim 1, characterized in that, In the case where each of the roller blind slat groups includes at least one flexible roller blind slat and at least one rigid roller blind slat, the roller blind slat group includes two roller blind slats connected together, and each of the roller blind slat groups includes one flexible roller blind slat and one rigid roller blind slat.

5. The projection screen according to any one of claims 1 to 4, characterized in that, The flexible material includes at least one of silicone, thermoplastic elastomer, thermoplastic polyurethane rubber, polyvinyl chloride modified soft rubber, and polyvinyl chloride modified rubber. The rigid material includes at least one of acrylonitrile-butadiene-styrene copolymer, carbon fiber, aluminum alloy, polycarbonate, and polyvinyl chloride.

6. The projection screen according to any one of claims 1 to 4, characterized in that, The projection screen also includes at least one limiting component, which includes a limiting rope and limiting holes located on the plurality of roller shutter slats. The limiting holes on the plurality of roller shutter slats are arranged opposite to each other, and the limiting rope passes through the limiting holes on the plurality of roller shutter slats.

7. The projection screen according to any one of claims 1 to 4, characterized in that, The projection screen also includes a first magnetic structure and a second magnetic structure. The first magnetic structure is located on the roller blind assembly, and the second magnetic structure is located on the side of the projection screen facing the roller blind assembly. The first magnetic structure and the second magnetic structure attract each other.

8. A projection device, characterized in that, The projection device includes a projector and a projection screen as described in any one of claims 1 to 7.

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