Projection screen and laser projection system

Abstract

The present application belongs to the field of projection display. Disclosed are a projection screen and a laser projection system. The projection screen comprises a frame, an optical screen and a rotating portion. When assembling the projection screen, an operator only needs to connect the rotating portion to an edge of the optical screen and apply a certain acting force to the rotating portion such that the rotating portion can rotate relative to the frame. During rotation relative to the frame, the rotating portion can tension the optical screen by means of the acting force applied to the edge of the optical screen, the rotating portion rotates to a target position and is then fixedly connected to the frame, so as to maintain a constant tensioning force, and a tensioning acting force can be applied to the optical screen, thus completing the assembly of the projection screen.

Description

Projection screens and laser projection systems

[0001] This application claims priority to Chinese patent applications with application number 202310721820.9 filed on June 16, 2023, and application name “Projection Screen” and with application number 202310723298.8 filed on June 16, 2023, and application name “Projection Screen”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of projection display, and in particular to a projection screen and a laser projection system. Background Art

[0003] With the continuous advancement of technology, projection equipment is increasingly being used in consumers' work and daily lives. Currently, projection equipment primarily consists of a projection host and a projection screen. The projection host's light outlet faces the projection screen, emitting a beam of light onto it. The projection screen receives this light to display the image.

[0004] Summary of the Invention

[0005] The embodiments of the present application provide a projection screen and a laser projection system. The technical solution is as follows:

[0006] According to one aspect of the present application, a projection screen is provided, comprising: a frame, an optical screen, and a rotating portion;

[0007] The frame has opposite front and back faces, and at least a portion of the optical screen is located on the front face of the frame;

[0008] The rotating part is assembled on the frame and connected to the edge of the optical screen. The rotating part can rotate relative to the frame, and is fixedly connected to the frame after rotating to a target position.

[0009] Wherein, the rotating portion is configured to apply a tensioning force to the optical screen during a process of rotating relative to the frame.

[0010] According to another aspect of the present application, a laser projection system is provided, comprising: a projection screen and a laser projection device, wherein the laser projection device is used to project an image onto the projection screen, and the projection screen comprises the above-mentioned projection screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0012] FIG1 is a schematic structural diagram of a detachable projection screen provided by the related art;

[0013] FIG2 is a schematic structural diagram of a projection screen provided in an embodiment of the present application;

[0014] FIG3 is an exploded schematic diagram of the projection screen shown in FIG2 ;

[0015] FIG4 is a schematic diagram of the tensioning effect of the projection screen shown in FIG2 ;

[0016] FIG5 is a schematic structural diagram of another projection screen provided in an embodiment of the present application;

[0017] FIG6 is an exploded schematic diagram of the projection screen shown in FIG5 ;

[0018] FIG7 is a schematic diagram of the tensioning effect of the projection screen shown in FIG5 ;

[0019] FIG8 is a schematic structural diagram of another projection screen provided in an embodiment of the present application;

[0020] FIG9 is a schematic structural diagram of another projection screen provided in an embodiment of the present application;

[0021] FIG10 is a schematic diagram of a partial structure of a projection screen provided in an embodiment of the present application;

[0022] FIG11 is a schematic diagram of an optical screen provided by an embodiment of the present application before and after tensioning;

[0023] FIG12 is a schematic diagram of the connection between a support rod, an optical screen, and the support rod provided in an embodiment of the present application;

[0024] FIG13 is a schematic diagram of a partial structure of another projection screen provided in an embodiment of the present application;

[0025] FIG14 is a schematic diagram of another projection screen assembly provided in an embodiment of the present application;

[0026] FIG15 is a schematic diagram of a partial structure of another projection screen provided in an embodiment of the present application;

[0027] FIG16 is a schematic diagram of a motion trajectory of a rotating portion and an optical screen provided in an embodiment of the present application;

[0028] FIG17 is a schematic diagram of a partial structure of another projection screen provided in an embodiment of the present application;

[0029] FIG18 is a schematic diagram of another projection screen tensioning effect provided by an embodiment of the present application;

[0030] FIG19 is a schematic structural diagram of a framework provided in an embodiment of the present application;

[0031] FIG20 is a schematic structural diagram of a rotating portion provided in an embodiment of the present application;

[0032] FIG21 is a schematic diagram of a first position-limiting member and a second position-limiting member provided in an embodiment of the present application;

[0033] FIG22 is a schematic diagram of another embodiment of the present application providing a first limit member and a second limit member provided by the clamping connection;

[0034] FIG23 is a schematic diagram of another embodiment of the present application providing a first limit member and a second limit member provided by the clamping connection;

[0035] FIG24 is a schematic diagram of a film structure of an optical screen provided in an embodiment of the present application;

[0036] FIG25 is a schematic structural diagram of another projection screen provided in an embodiment of the present application;

[0037] FIG26 is a schematic diagram of a partial structure of another projection screen provided in an embodiment of the present application;

[0038] FIG27 is a schematic diagram of a partial structure of another projection screen provided in an embodiment of the present application;

[0039] FIG28 is a schematic diagram of a partial structure of another projection screen provided in an embodiment of the present application;

[0040] FIG29 is a schematic structural diagram of a laser projection system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0042] In the related art, to address the problem of large overall size of projection screens, which makes them difficult to transport, projection screens can be made detachable. For example, referring to Figure 1 , projection screen 00 generally includes: a frame 01 , an optical screen 02 , support rods (not labeled in the figure), and springs 03 .

[0043] The optical screen 02 in the projection screen 00 is attached to the front surface of the frame 01 , and the edges of the optical screen 02 are folded over so that the optical screen 02 wraps around the edges of the frame 01 .

[0044] The support rods in the projection screen 00 may be located at the back of the frame 01 , and after the edges of the optical screen 02 are folded over to wrap around the edges of the frame 01 , the support rods may be connected to the edges of the optical screen 02 .

[0045] Spring 03 in projection screen 00 can be located on the back of frame 01, with one end of spring 03 connected to frame 01 and the other end connected to the support rod. Here, spring 03 can be a tension spring, which can apply tension to the support rod, allowing the support rod to apply tension to optical screen 02. This in turn makes the front of optical screen 02 (i.e., the side where the projection image is to be displayed) more flat, thereby improving the display effect of the projection image displayed on optical screen 02.

[0046] Typically, the frame 01 of projection screen 00 is rectangular, and there are four support rods in projection screen 00. Each of the four support rods corresponds to one of the four frames of frame 01, and each support rod can be located at the location of a corresponding frame. Multiple springs 03 are connected to each support rod in projection screen 00. Multiple springs 03 connected to the same support rod can apply uniform tension to the support rod, allowing the support rod to pull optical screen 02 against the corresponding frame of frame 01.

[0047] Because each support rod in projection screen 00 requires connection to multiple springs 03, the number of springs 03 in projection screen 00 is relatively large. During assembly, the operator must apply a tensile force to each spring 03, ensuring that one end of each spring 03 is connected to frame 01 and the other end is connected to the corresponding support rod. This process of applying the tensile force to the springs 03 is complex, making assembly of projection screen 00 more difficult and inefficient. Furthermore, after long-term use, the springs 03 can easily fatigue, reducing the tension on the screen and resulting in poor screen flatness.

[0048] The projection screen provided in the embodiment of the present application can be applied to a laser projection system, which can include a laser projection device and a projection screen, wherein the laser projection device can project a projection image onto the projection screen. The projection screen carries the projection image.

[0049] In some specific embodiments, referring to FIG. 2 , FIG. 3 and FIG. 4 , the projection screen 000 may include: a frame 100 , an optical screen 200 and a rotating part 300 .

[0050] The frame 100 has opposite front and back surfaces a1 and a2 , and at least a portion of the optical screen 200 may be located on the front surface a1 of the frame 100 .

[0051] The rotating part 300 can be assembled on the frame 100. In some specific embodiments, the rotating part 300 can be located on one of the front side a1 and the back side a2 of the frame 100 and connected to the edge of the optical screen 200. The rotating part 300 can rotate relative to the frame 100 and is fixedly connected to the frame 100 after the rotating part 300 rotates to the target position.

[0052] It can be understood that in some specific embodiments, the fixed connection between the rotating part 300 and the frame 100 refers to connecting the frame 100 and the rotating part 300 so that there is no relative movement (e.g., relative rotation) between the frame 100 and the rotating part 300, and the fixed connection can be a detachable connection.

[0053] The rotating portion 300 in the projection screen 000 may be configured to apply a tensioning force to the optical screen 200 during the process of rotating relative to the frame 100 .

[0054] In some specific embodiments, when an operator needs to assemble the projection screen 000, they can first place both the rotating portion 300 and the optical screen 200 on the frame 100; then, connect the rotating portion 300 to the edge of the optical screen 200; then, drive the rotating portion 300 to rotate relative to the frame 100. During the rotation of the end of the rotating portion 300 connected to the optical screen 200 relative to the frame 100, a tensioning force can be applied to the edge of the optical screen 200 to adjust the tension of the optical screen 200; finally, after the rotating portion 300 rotates to a target position relative to the frame 100, it is fixedly connected to the frame 100 to secure the rotating portion 300 to the frame 100, thereby achieving tension on the optical screen 200 in the projection screen 000 and ensuring normal use of the optical screen 200. It should be noted that in some specific embodiments, the target position of the rotating portion 300 after rotation can be set according to the actual tensioning requirements of the optical screen 200, and different target positions can be used to represent different rotation angles of the rotating portion 300 relative to the frame 100.

[0055] In summary, embodiments of the present application provide a projection screen that may include a frame, an optical screen, and a rotating portion. When assembling the projection screen, an operator simply connects the rotating portion to the edge of the optical screen and applies a certain force to the rotating portion to enable it to rotate relative to the frame. During rotation relative to the frame, the rotating portion applies force to the edge of the optical screen, tightening the optical screen. After the rotating portion rotates to a target position, it is fixedly connected to the frame to maintain a constant tension. By applying a tensioning force to the optical screen, the projection screen is assembled. This reduces the difficulty of assembling the projection screen, effectively simplifying the assembly process and ensuring high assembly efficiency.

[0056] Furthermore, this improves the flatness of the front surface of the optical screen, ensuring a better display quality for the projected image displayed on the optical screen. Furthermore, by utilizing the rotational displacement of the rotating portion relative to the frame to achieve tensioning of the optical screen, the rotating portion does not fatigue after prolonged use, maintaining a good force exerted by the rotating portion on the optical screen, thereby achieving a better tensioning effect on the optical screen.

[0057] In some specific embodiments, as shown in Figures 2, 3, and 4, the projection screen 000 may include a frame 100, an optical screen 200, and a rotating portion 300. The rotating portion 300 and the optical screen 200 may both be assembled on the frame 100. The optical screen 200 and the rotating portion 300 may both be located on the front side a1 of the frame 100. After the rotating portion 300 rotates to a target position, it may be connected to the front side a1 of the frame 100.

[0058] The rotating portion 300 in the projection screen 000 can be configured to apply a force toward the edge of the frame 100 to the optical screen 200 during the rotation relative to the frame 100. That is, the rotating portion 300 can apply a force toward the edge of the frame 100 to the optical screen 200 during the rotation relative to the frame 100, so that the edge of the optical screen 200 moves toward the edge of the frame 100.

[0059] It can be understood that, in some specific embodiments, the edge of the optical screen 200 and the edge of the frame 100 do not refer to just one edge. The edge of the optical screen 200 may refer to at least a portion of the edge area located on the optical screen 200 and connected to the edge, and the edge of the frame 100 may refer to at least a portion of the edge area located on the frame 100 and connected to the edge.

[0060] In some specific embodiments, when the operator needs to assemble the projection screen 000, first, the rotating part 300 and the optical screen 200 can be placed on the front side a1 of the frame 100; then, the rotating part 300 is connected to the edge of the optical screen 200; thereafter, the rotating part 300 is driven to rotate relative to the frame 100. During the process of the end portion of the rotating part 300 connected to the optical screen 200 rotating relative to the frame 100, a force close to the edge of the frame 100 can be applied to the edge of the optical screen 200 to adjust the tension of the optical screen 200; finally, after the rotating part 300 is rotated to the target position relative to the frame 100, it is connected to the front side a1 of the frame 100 to fix the rotating part 300 on the frame 100, thereby achieving the tensioning of the optical screen 200 in the projection screen 000 and ensuring the normal use of the optical screen 200. It should be noted that in some specific embodiments, the target position of the rotating part 300 after rotation can be set according to the actual tensioning requirements of the optical screen 200, and different target positions can be used to represent different rotation angles of the rotating part 300 relative to the frame 100.

[0061] In some specific embodiments, an operator only needs to connect the rotating portion 300 located on the front surface a1 of the frame 100 to the edge of the optical screen 200 located on the front surface a1 of the frame 100 and apply a certain force to the rotating portion 300 to enable it to rotate relative to the frame 100. Furthermore, during the rotation of the rotating portion 300, a force can be applied to the optical screen 200 to tighten the optical screen 200. After the rotating portion 300 rotates to the target position, it is connected to the front surface a1 of the frame 100 to maintain a constant tension, thereby completing the assembly of the projection screen 000. This reduces the difficulty of assembling the projection screen 000, effectively simplifies the assembly process of the projection screen 000, and ensures a high assembly efficiency of the projection screen 000. Furthermore, in some specific embodiments, the optical screen 200 is tightened by rotating the rotating portion 300 relative to the frame 100. This prevents fatigue of the rotating portion 300 even after extended use, maintaining a strong force on the optical screen 200 and thereby improving the tensioning effect on the optical screen 200. Furthermore, the edge of the optical screen 200 does not need to be folded over the back surface a2 of the frame 100 for connection, eliminating direct contact between the edge of the optical screen 200 and the frame 100, thus preventing damage to the optical screen 200 by the frame 100.

[0062] Please refer to Figures 5, 6, and 7. In some embodiments, the projection screen 000 may include a frame 100, an optical screen 200, and a rotating portion 300. Both the rotating portion 300 and the optical screen 200 may be assembled on the frame 100. The optical screen 200 is attached to the front side a1 of the frame 100, with the edges of the optical screen 200 folded over so that the optical screen 200 wraps around the edges of the frame 100. The rotating portion 300 is located on the back side a2 of the frame 100. In some embodiments, after rotating to a target position, the rotating portion 300 may be directly connected to the back side a2 of the frame 100.

[0063] The rotating portion 300 in the projection screen 000 is configured to apply a force to the optical screen 200 that is directed away from the edge of the frame 100 during the rotation relative to the frame 100. In other words, the rotating portion 300 applies a force to the optical screen 200 that is directed away from the edge of the frame 100 during the rotation relative to the frame 100, so that the edge of the optical screen 200 moves in a direction away from the edge of the frame 100.

[0064] In some specific embodiments, when the operator needs to assemble the projection screen 000, first, the operator can fold the edge of the optical screen 200 so that the optical screen 20 wraps the edge of the frame 100; then, the rotating part 300 is placed on the back side a2 of the frame 100 and connected to the edge of the optical screen 200; thereafter, the rotating part 300 is driven to rotate relative to the frame 100. During the process of the end of the rotating part 300 connected to the optical screen 200 rotating relative to the frame 100, a force away from the edge of the frame 100 can be applied to the optical screen 200 to adjust the tension of the optical screen 200; finally, after the rotating part 300 rotates to the target position relative to the frame 100, it is engaged with the back side a2 of the frame 100 to fix the rotating part 300 on the frame 100, thereby achieving the tensioning of the optical screen 200 in the projection screen 000 and ensuring the normal use of the optical screen 200. It should be noted that in some specific embodiments, the target position of the rotating part 300 after rotation can be set according to the actual tensioning requirements of the optical screen 200, and different target positions can be used to represent different rotation angles of the rotating part 300 relative to the frame 100.

[0065] In some specific embodiments, an operator simply folds the rotating portion 300 and the optical screen 200 to connect them at the edge of the rear surface a2 of the frame 100 and applies a certain force to the rotating portion 300 to enable it to rotate relative to the frame 100. During the rotation of the rotating portion 300, force is applied to the optical screen 200 to tighten the optical screen 200. After the rotating portion 300 rotates to the target position, it engages with the rear surface a2 of the frame 100 to maintain a constant tension, thus completing the assembly of the projection screen 000. This reduces the difficulty of assembling the projection screen 000, effectively simplifying the assembly process and ensuring high assembly efficiency. Furthermore, by utilizing the rotational displacement of the rotating portion 300 relative to the frame 100 to tighten the optical screen 200, the rotating portion 300 does not fatigue after extended use, maintaining a good force applied by the rotating portion 300 on the optical screen 200 and thus achieving a better tensioning effect on the optical screen 200.

[0066] Please refer to Figures 8 and 9. The frame 100 in the projection screen 000 may include: two long frames A arranged opposite to each other and two short frames B arranged opposite to each other. In the projection screen, the number of rotating parts 300 connected to the long frames A in the frame 100 may be at least one, that is, at least one rotating part 300 can rotate relative to the long frames A of the frame 100 after being connected to the edge of the optical screen 200; the number of rotating parts 300 connected to the short frames B in the frame 100 may be at least one, that is, at least one rotating part 300 can rotate relative to the short frames B of the frame 100 after being connected to the edge of the optical screen 200. In some specific embodiments, angle irons (not shown) can be used to fix each two adjacent long frames A and short frames B so that the two long frames A and the two short frames B can form a rectangular frame. In some specific embodiments, the frame 100 may also include: at least one auxiliary frame F, which can be located between the two oppositely arranged long frames A, and the two ends of the auxiliary frame F can be fixedly connected to the two long frames A respectively. In this way, the auxiliary frame F can stably support the two long frames A in the frame, preventing them from falling and deforming after long-term use.

[0067] In some specific embodiments, please refer to FIG. 10 . The rotating portion 300 in the projection screen 000 may include a supporting member 301 connected to the edge of the optical screen 200, and a rotating member 302 connected to the supporting member 301, capable of rotating relative to the frame 100. The end of the supporting member 301 connected to the edge of the optical screen 200 may be closer to the edge of the frame 100 than the end of the rotating member 302 that rotates relative to the frame 100. The supporting member 301 has a first end connected to the edge of the optical screen 200, and the rotating member 302 has a second end rotatably connected to the frame 100. The first end of the supporting member 301 may be located on the side of the second end of the rotating member 302 closer to the edge of the frame 100. In this case, the rotating portion 300 includes the supporting member 301 for connecting to the edge of the optical screen 200, and the rotating member 302 connected to the supporting member 301, and the rotating member 302 is capable of rotating relative to the frame 100. As the rotating member 302 rotates relative to the frame 100, it drives the supporting member 301 to rotate relative to the frame 100. Simultaneously, the supporting member 301 can apply a force to the optical screen 200 near the edge of the frame 100, thereby tensioning the optical screen 200. For further explanation, see Figure 11. As the supporting member 301 rotates relative to the frame 100, it drives the edge of the optical screen 200 to move horizontally (parallel to the front of the frame 100) and vertically (perpendicular to the front of the frame 100) toward the frame 200. After the rotating member 302 rotates to the target position relative to the frame 100, the length of the optical screen 200 is stretched from L1 to L2, with L2 being greater than L1, thereby tensioning the optical screen 200. In some specific embodiments, the rotating member 302 in the rotating portion 300 can be a rotating plate, the length extension direction of the rotating plate can be parallel to the length extension direction of the corresponding connected frame, and the supporting member 301 can be arranged on one side of the rotating member 302 close to the edge of the frame 100.

[0068] In some specific embodiments, as shown in FIG10 , the frame 100 of the projection screen may include: a bottom plate 100a and side plates 100b connected to each other; a rotating member 302 in the rotating portion 300 is rotatable relative to the bottom plate 100a; and after the rotating portion 300 rotates to a target position, the bottom plate 100a may be connected to the rotating member 302; and / or the supporting member 301 may be connected to the side plates 100b. That is, after the rotating portion 300 rotates to a target position, the connection between the frame 100 and the rotating portion 300 may include: the bottom plate 100a is connected to the rotating member 302, the supporting member 301 is connected to the side plates 100b, or the bottom plate 100a is connected to the rotating member 302, and the supporting member 301 is connected to the side plates 100b.

[0069] In some specific embodiments, after the rotating part 300 rotates to the target position, the bottom plate 100a in the frame 100 can be connected to the rotating member 302 in the rotating part 300 to connect and fix the rotating part 300 to the frame 100; or, after the rotating part 300 rotates to the target position, the side plate 100b in the frame 100 can be connected to the supporting member 301 in the rotating part 300 to connect and fix the rotating part 300 to the frame 100; or, after the rotating part 300 rotates to the target position, the bottom plate 100a in the frame 100 can be connected to the rotating member 302 in the rotating part 300, and the side plate 100b in the frame 100 can be connected to the supporting member 301 in the rotating part 300 to achieve a stable connection between the rotating part 300 and the frame 100.

[0070] In some specific embodiments, the base plate 100a in the frame 100 has a first mounting through hole, and the rotating member 302 in the rotating part 300 has a second mounting through hole opposite to the first mounting through hole. The projection screen may further include a fixing bolt, which may be located in the first mounting hole and the second mounting hole. The base plate 100a in the frame 100 may be connected to the rotating member 302 in the rotating part 300 through the fixing bolt.

[0071] In some embodiments, as shown in FIG10 , the side of the bottom plate 100a of the frame 100 facing the optical screen may have a first supporting groove 100d. At least a portion of the rotating member 302 may be located within the first supporting groove 100d, and the end of the rotating member 302 facing away from the supporting member 301 may be rotatable relative to the bottom plate 100a within the first supporting groove 100d. In other words, the end of the rotating member 302 facing away from the supporting member 301 may be rotatably connected to the first supporting groove 100d. In some embodiments, after the rotating member 300 rotates to a target position, the relative position between the frame 100 and the rotating member 300 includes at least one of: the supporting member 301 contacts the side of the side plate 100b of the frame 100 proximate to the optical screen 200, the rotating member 302 contacts the bottom surface of the first supporting groove 100d, and the supporting member 301 contacts the side of the side plate 100b proximate to the optical screen 200, and the rotating member 302 contacts the bottom surface of the first supporting groove 100d. In some specific embodiments, the side panels 100b and bottom panel 100a of the frame 100 may be perpendicular to each other, and the supporting member 301 and rotating member 302 of the rotating portion 300 may be perpendicular to each other. The first end of the supporting member 301 may be connected to the optical screen 200. The second end of the supporting member 301 may be fixedly connected to the first end of the rotating member 302, and the second end of the rotating member 302 may be rotatable relative to the frame 100.

[0072] In some specific embodiments, please refer to Figures 10 and 12. The projection screen 000 may further include: a support rod 400. The carrier 301 in the rotating part 300 may have a carrier cavity 301a, and an opening 301b communicating with the carrier cavity 301a, and the opening 301b may be located on a side of the carrier 301 close to the edge of the optical screen 200. The edge of the optical screen 200 may have a receiving pocket a1, and the receiving pocket a1 may have a port for the support rod 400 to enter. The edge of the optical screen 200 may be connected to the support rod 400, that is, the edge of the optical screen 200 may be connected to the support rod 400 after wrapping the edge of the frame 100, and the support rod 400 may be snapped into the carrier cavity 301a through the opening 301b in the carrier 301. In this case, after the support rod 400 is connected to the edge of the optical screen 200, it can be snapped into the bearing cavity 301a of the carrier 301. When the rotating portion 300 rotates relative to the frame 100 to flatten the optical screen 200, the bearing cavity 301a on the carrier 301 can limit the support rod 400, helping to tighten the optical screen 200. In addition, by providing a receiving pocket a1 on the edge of the optical screen 200, the support rod 400 can be installed into the receiving pocket a1 through the end of the receiving pocket a1. This simplifies the assembly process of the support rod 400 and the optical screen 200, and the receiving pocket a1 can also limit the support rod 400.

[0073] In some specific embodiments, as shown in Figures 10 and 11 , the edge of the frame 100 of the projection screen 000 may have a snap-fit ​​groove 101 (i.e., the side of the bottom plate 100a proximal to the optical screen 200 may have a snap-fit ​​groove 101). The second end of the rotating member 302 may be located within the snap-fit ​​groove 101. Specifically, the end of the rotating member 302 that rotates relative to the frame 100 may extend into the snap-fit ​​groove 101 on the edge of the frame 100 and abut against the inner wall of the snap-fit ​​groove 101. In this case, by providing the snap-fit ​​groove 101 on the edge of the frame 100, the end of the rotating member 302 that rotates relative to the frame 100 may extend into the snap-fit ​​groove 101 and abut against the inner wall of the snap-fit ​​groove 101. In this way, the end of the rotating member 302 that rotates relative to the frame 100 can slide relative to the inner wall of the snap-fit ​​groove 101 within the snap-fit ​​groove 101, thereby enabling relative rotation between the rotating member 300 and the frame 100.

[0074] In some specific embodiments, as shown in Figures 10 and 11 , the engaging groove 101 on the edge of the frame 100 may have a first plane c1 parallel to the front surface b1 of the optical screen 200, and a second plane c2 adjacent to the first plane c1. The second plane c2 is closer to the front surface b1 of the optical screen 200 than the first plane c1. The angle between the first plane c1 and the second plane c2 in the engaging groove 101 may be an acute angle. It should be noted that the front surface b1 of the optical screen 200 may be the side of the optical screen 200 that normally displays the projected image. In this case, by setting the angle between the first plane c1 and the second plane c2 of the engaging groove 101 to an acute angle, the end of the rotating member 302 that rotates relative to the frame 100 extends into the engaging groove 101. This allows the engaging groove 101 to limit the rotating member 302 in the rotating member 300 during rotation relative to the frame 100, preventing the rotating member 302 from disengaging from the engaging groove 101 in the frame 100. As shown in Figure 12, in some specific embodiments, the end of the rotating member 302 that rotates relative to the frame 100 may have an arc-shaped convex surface d1, and the end of the rotating member 302 that rotates relative to the frame 100 abuts against the inner wall of the clamping groove 101 of the frame 100 through the arc-shaped convex surface d1, ensuring that the rotating member 302 in the rotating part 300 can slide smoothly relative to the frame 100.

[0075] In some specific embodiments, please refer to Figures 13 and 14. The rotating portion 300 in the projection screen 000 may further include a connecting shaft 303 connected to the end of the rotating member 302 that rotates relative to the frame 100. In other words, the connecting shaft 303 is connected to the second end of the rotating member 302. The connecting shaft 303 can be rotatably connected to the edge of the frame 100. In this case, the rotating portion 300 can be rotatably connected to the edge of the frame 100 via the connecting shaft 303, further ensuring the stability of the connection between the rotating portion 300 and the edge of the frame 100 during relative rotation. Thus, the connecting shaft 303 can be provided at the end of the rotating member 302 that rotates relative to the frame 100, and a connecting hole (not shown) can be provided on the edge of the frame 100. At least a portion of the connecting shaft 303 can be located within the connecting hole. The mating of the connecting shaft and the connecting hole enables the rotating portion 300 to rotate relative to the frame 100. It should be noted that in other possible implementations, a connection hole may be provided at the end of the rotating member that rotates relative to the frame, and a connection shaft may be provided at the edge of the frame, with the connection shaft being rotatably connected to the connection hole. It should also be noted that other transmission members may also be used to achieve relative rotation between the rotating member and the edge of the frame, and this embodiment of the present application does not specifically limit this.

[0076] In some specific embodiments, as shown in Figures 13 and 14, the rotating portion 300 in the projection screen 000 may further include a first stopper 304 fixedly connected to the edge of the carrier 301 facing away from the optical screen 200. The frame 100 may also include a second stopper 102. The side panel 100b of the frame 100 facing away from the bottom panel 100a may have a first stopper groove 100c, and the second stopper 102 may be located within the first stopper groove 100c. After the rotating portion 300 rotates to a target position, the first stopper 304 in the rotating portion 300 may engage with the second stopper 102 in the first stopper groove 100c of the frame 100. In this case, the first stopper 304 is provided on the edge of the carrier 301 facing away from the optical screen 200, and the second stopper 102 is provided on the side panel 100b of the frame 100. In this way, after the rotating part 300 rotates to the target position relative to the frame 100, the rotating part 300 can be conveniently fixed by the clamping action of the first limit member 304 and the second limit member 102, and then a constant tensioning force can be applied to the optical screen 200 through the supporting member 301.

[0077] In some specific embodiments, please refer to FIG. 15 . The rotating portion 300 in the projection screen 000 may include a support member 301 connected to the edge of the optical screen 200, and a rotating member 302 connected to the support member 301, capable of rotating relative to the frame 100. The end of the rotating member 302 that rotates relative to the frame 100 may be closer to the edge of the frame 100 than the end of the support member 301 connected to the edge of the optical screen 200. In other words, the rotating member 302 has a second end that is rotatably connected to the frame 200, the support member 301 has a first end that is connected to the edge of the optical screen 200, and the second end of the rotating member 302 is located on the side of the first end of the support member 301 that is closer to the edge of the frame 100. In this case, by providing the support member 301 for connecting to the edge of the optical screen 200 and the rotating member 302 connected to the support member 301 in the rotating portion 300, the rotating member 302 can rotate relative to the frame 100. Thus, when the rotating member 302 rotates relative to the frame 100 , it can drive the supporting member 301 to rotate relative to the frame 100 . At the same time, the supporting member 301 can apply a force to the optical screen 200 away from the edge of the frame 100 to tighten the optical screen 200 .

[0078] In some specific embodiments, the first end of the carrier 301 can be connected to the edge of the optical screen 200, the second end of the carrier 301 can be fixedly connected to the first end of the rotating member 302, and the second end of the rotating member 302 can rotate relative to the frame. For example, the carrier 301 and the rotating member 302 are perpendicular to each other to form a bent structure.

[0079] Please refer to Figure 16 . As the support member 301 rotates relative to the frame 100, it drives the edge of the optical screen 200 to rotate in the same direction relative to the frame 100. However, the rotation trajectory G1 of the support member 301 differs from the rotation trajectory G2 of the edge of the optical screen 200. After the rotating portion 300 rotates to the target position, the distance the rotating portion 300 drives the edge of the optical screen 200 to stretch is: L2 - L1.

[0080] In some specific embodiments, the rotating member 302 in the rotating portion 300 can be a rotating plate, the length extension direction of the rotating plate can be parallel to the length extension direction of the corresponding connected frame, and the supporting member 301 can be arranged on one side of the rotating member 302 close to the edge of the optical screen 200.

[0081] In some specific embodiments, as shown in Figures 15 and 16 , the edge of the frame 100 in the projection screen 000 may have a snap-fit ​​groove 101, with the second end of the rotating member 302 positioned within the snap-fit ​​groove 101. The end of the rotating member 302 that rotates relative to the frame 100 may extend into the snap-fit ​​groove 101 and abut against the inner wall of the snap-fit ​​groove 101. In this case, by providing the snap-fit ​​groove 101 on the edge of the frame 100, the end of the rotating member 302 that rotates relative to the frame 100 may extend into the snap-fit ​​groove 101 and abut against the inner wall of the snap-fit ​​groove 101. In this manner, the end of the rotating member 302 that rotates relative to the frame 100 can slide relative to the inner wall of the snap-fit ​​groove 101 within the snap-fit ​​groove 101, thereby enabling relative rotation between the rotating member 300 and the frame 100.

[0082] In some specific embodiments, as shown in FIG15 , the engaging groove 101 on the edge of the frame 100 may have a first plane c1 parallel to the front surface b1 of the optical screen 200, and a second plane c2 adjacent to the first plane c1. The first plane c1 is closer to the front surface b1 of the optical screen 200 than the second plane c2. Furthermore, the angle between the first plane c1 and the second plane c2 in the engaging groove 101 may be an acute angle. It should be noted that the front surface b1 of the optical screen 200 may be the side of the optical screen 200 that normally displays the projected image. In this case, by setting the angle between the first plane c1 and the second plane c2 of the engaging groove 101 to an acute angle, the end of the rotating member 302 that rotates relative to the frame 100 extends into the engaging groove 101. This allows the engaging groove 101 to limit the rotating member 302 in the rotating member 300 during rotation relative to the frame 100, preventing the rotating member 302 from disengaging from the engaging groove 101 in the frame 100. In some specific embodiments, as shown in Figure 12, the end of the rotating member 302 that rotates relative to the frame 100 may have an arc-shaped convex surface d1, and the end of the rotating member 302 that rotates relative to the frame 100 abuts against the inner wall of the clamping groove 101 of the frame 100 through the arc-shaped convex surface d1, ensuring that the rotating member 302 in the rotating part 300 can slide smoothly relative to the frame 100.

[0083] In some specific embodiments, please refer to Figures 17 and 18. The rotating portion 300 in the projection screen 000 may further include a connecting shaft 303 connected to the second end of the rotating member 302. Specifically, the connecting shaft 303 is connected to the end of the rotating member 302 that rotates relative to the frame 100. The connecting shaft 303 may be rotatably connected to the edge of the frame 100. In this case, the rotating portion 300 can be rotatably connected to the edge of the frame 100 via the connecting shaft 303, further ensuring the stability of the connection between the rotating portion 300 and the edge of the frame 100 during relative rotation. In some specific embodiments, the connecting shaft 303 may be provided at the end of the rotating member 302 that rotates relative to the frame 100, and a connecting hole (not shown) may be provided on the edge of the frame 100. At least a portion of the connecting shaft 303 may be located within the connecting hole. The mating of the connecting shaft and the connecting hole enables the rotating portion 300 to rotate relative to the frame 100. It should be noted that in other possible implementations, a connection hole may be provided at the end portion of the rotating member 302 that rotates relative to the frame 100, and a connection shaft may be provided at the edge of the frame, the connection shaft being rotatably connected to the connection hole. It should also be noted that other transmission members may also be used to achieve relative rotation between the rotating member and the edge of the frame, and this embodiment of the present application does not specifically limit this.

[0084] In some specific embodiments, as shown in Figures 17 and 18, the back side of the frame 100 may have a second supporting groove 100e. At least a portion of the rotating portion 300 may be located within the second supporting groove 100e, and the end of the rotating member 302 facing away from the supporting member 301 is rotatably connected to the second supporting groove 100e, allowing the rotating portion 300 to rotate relative to the frame 100 within the second supporting groove 100e. In this way, after the rotating portion 300 rotates to a target position, the rotating member 302 in the rotating portion 300 can contact the bottom surface of the second supporting groove 100e, providing support for the rotating portion 300. Furthermore, the second supporting groove 100e can accommodate the rotating portion 300, thereby reducing the overall thickness of the assembled projection screen.

[0085] In some specific embodiments, as shown in Figures 17 and 18 , the frame 100 of the projection screen may further include a guide member 100f and a connector 100g. The guide members 100f and connector 100g are located on either side of the second bearing slot 100e, with the guide member 100f located on the side of the connector 100g closer to the edge of the frame. The guide member 100f may be closer to the edge of the frame 100 than the connector 100g. The guide member 100f can be used to contact the optical screen 200 during the folding process, while the connector 100g can be connected to the rotating portion 302 when it is rotated to a target position. The provision of the guide member 100f thus supports the optical screen 200 during the folding process, preventing damage to the optical screen 200 from the frame 100. In some specific embodiments, as shown in FIG26 , at least a portion of the edge of the frame 100 that contacts the optical screen 200 may be a curved convex surface 103 that protrudes toward the optical screen 200. In this case, by providing at least a portion of the edge of the frame 100 that contacts the optical screen 200 with the curved convex surface 103, after the edge of the optical screen 200 is folded over to wrap around the edge of the frame 100, the edge of the frame 100 can provide good support for the edge of the optical screen 200, substantially preventing damage to the edge of the optical screen 200.

[0086] In some specific embodiments, as shown in Figures 17 and 18, the rotating portion 300 of the projection screen 000 may further include a first stopper 304, and the frame 100 may further include a second stopper 102. The connecting member 100g on the frame 100 may include a second stopper groove 100h, and the second stopper 102 may be located within the second stopper groove 100h. The first stopper 304 in the rotating portion 300 may engage with the second stopper 102 in the frame 100. In some specific embodiments, the first stopper 304 may be disposed on a side of the carrier 301 facing away from the edge of the optical screen 200. In this case, the first stopper 304 is provided in the rotating portion 300, and the second stopper groove 100h is provided on the connecting member 100g in the frame 100, with the second stopper 102 located within the second stopper groove 100h. In this way, after the rotating part 300 rotates to the target position relative to the frame 100, the rotating part 300 can be conveniently fixed by the first limiting member 304 and the second limiting member 102 in the second limiting groove 100h, and then a constant tensioning force is applied to the optical screen 200 through the supporting member 301.

[0087] In some specific embodiments, please refer to Figures 13, 17, and 19. One of the first limiting member 304 in the rotating portion 300 and the second limiting member 102 in the frame 100 may include an elastic protrusion 102a, which can be used to engage with the other of the first limiting member 304 and the second limiting member 102. In some specific embodiments, the first limiting member 304 in the rotating portion 300 may include an elastic protrusion 102a, which can be used to engage with the second limiting member 102 in the frame 100; or the second limiting member 102 in the frame 100 may include an elastic protrusion 102a, which can be used to engage with the first limiting member 304 in the rotating portion 300. It should be noted that in some specific embodiments, the second position-limiting member 102 in the frame 100 includes an elastic protrusion 102a, which is engaged with the first position-limiting member 304 in the rotating portion 300. Thus, by providing the elastic protrusion 102a on the back surface of the frame 100, after the rotating portion 300 rotates relative to the frame 100 to a target position, the first position-limiting member 304 in the rotating portion 300 can engage with the elastic protrusion 102a on the frame 100, thereby conveniently achieving the locking and fixing of the rotating portion 300.

[0088] In some specific embodiments, please refer to Figure 20. A threaded hole e1 may be provided on the carrier 301, and the first limiting member may be a pin or a screw, and the first limiting member may be fixedly connected to the carrier 301 through the threaded hole e1.

[0089] In some specific embodiments, referring to Figures 21 and 22, the first stopper 304 and the second stopper 102 shown in Figure 21 may be the schematic diagram of the first stopper 304 and the second stopper 102 in Figure 13, and the first stopper 304 and the second stopper 102 shown in Figure 22 may be the schematic diagram of the first stopper 304 and the second stopper 102 in Figure 17. The second stopper 102 in the frame 100 may have a guide groove 102b. The elastic protrusion 102a may include an elastic element C and a protrusion D. The elastic element C may be located within the guide groove 102b in the frame 100, and the protrusion D may be partially located within the guide groove 102b and partially located outside the guide groove 102b. Furthermore, the elastic element C can be located between the bottom of the guide groove 102b (the bottom of the guide groove can be the side of the guide groove opposite the protrusion located within the guide groove) and the protrusion D, and can be connected to the bottom of the guide groove 102b and the protrusion D, respectively. In this case, after the rotating portion 300 rotates to the target position, the first limiting member 304 in the rotating portion 300 can engage with the protrusion D in the elastic protrusion 102a, thereby limiting the position of the first limiting member 304. In addition, the guide groove 102b can provide a certain degree of guidance for the movement of the protrusion D, reducing the probability of misalignment when the protrusion D contacts the first limiting member 304, and ensuring that the protrusion D effectively limits the first limiting member 304.

[0090] In some specific embodiments, please refer to Figure 23. The first stopper 304 in the rotating portion 300 may have a third stopper groove e2 that engages with the protrusion D in the elastic protrusion 102a. Alternatively, as shown in Figure 22, after the rotating portion 300 rotates to the target position, the protrusion D may engage with the side of the first stopper 304 that is closer to the front surface b1 of the optical screen 200. In some specific embodiments, the second stopper 102 may include two oppositely disposed elastic protrusions 102a, and the number of corresponding guide grooves 102b may be two. The two oppositely disposed elastic protrusions 102a further ensure the effective engagement with the first stopper 304.

[0091] In some specific embodiments, when the first limiting member 304 in the rotating part 300 has a third limiting groove e2 that cooperates with the protrusion D in the elastic protrusion 102a, the rotating part 300 rotates to the target position relative to the frame 100, that is, the guide groove 102b in the second limiting member 102 and the third limiting groove e2 in the first limiting member 304 can be connected; the protrusion D can move in the direction away from the bottom of the guide groove 102b under the elastic force of the elastic element C, so that a part of the protrusion D can be located in the third limiting groove e2 in the first limiting member 304, that is, the first limiting member 304 and the second limiting member 102 can be snapped together.

[0092] In some specific embodiments, after the rotating portion 300 rotates to a target position relative to the frame 100, the protrusion D can engage with the side of the first limiting member 304 that is closer to the front surface b1 of the optical screen 200. Specifically, the protrusion D can now limit the first limiting member 304, preventing the first limiting member 304 from rotating toward the front surface b1 of the optical screen 200. For example, the protrusion D in the elastic protrusion 102a can be a limiting sphere that is partially located within the guide groove 102b and partially located outside the guide groove 102b. The elastic element C in the elastic protrusion 102a can be a compression spring positioned between the bottom of the guide groove 102b and the protrusion D.

[0093] In some specific embodiments, see Figure 24. The optical screen 200 in projection screen 000 may include a flexible supporting layer 201 and multiple optical layers 202. The edges of the flexible supporting layer 201 are folded over so that the flexible supporting layer 201 wraps around the edge of the frame 100, and at least some of the multiple optical layers 202 may be located on the side of the flexible supporting layer 201 closest to the frame 100. This allows the flexible supporting layer 201 in the optical screen 200 to be directly secured to the frame 100 without requiring a synthetic fabric. This reduces the structural complexity of projection screen 000 and eliminates wavy distortion in the projected image caused by differential expansion and contraction between the synthetic fabric and a film (not shown). Furthermore, the flexible supporting layer 201 can also serve as a substrate for the production of other optical layers. It should be noted that in some specific embodiments, the optical screen may also be formed by bonding a film to a synthetic fabric, with the edges of the synthetic fabric folded over so that the fabric wraps around the edge of the frame.

[0094] In some specific embodiments, please refer to FIG. 25 . The projection screen 000 may further include an auxiliary frame 500 connected to the frame 100. The auxiliary frame 500 may include a first sheet structure 501 and a second sheet structure 502. One side of the first sheet structure 501 may be fixedly connected to one side of the second sheet structure 502, that is, a portion of the edge of the first sheet structure 501 may be fixedly connected to one side of the second sheet structure 502. The first sheet structure 501 may be located on a side of the rotating portion 300 facing away from the frame 100 in a direction perpendicular to the front face of the optical screen 200 (e.g., the Y-axis direction in the figure). The second sheet structure 502 may be located on a side of the frame 100 facing away from the rotating portion 300 in a direction parallel to the front face of the optical screen 200 (e.g., the X-axis direction in the figure). In this case, the front of the frame 100 can be decorated by the first sheet structure 501 in the auxiliary frame 500, and the side of the frame 100 can be decorated by the second sheet structure 502, so that when the user views the frame 100 from the front, only the optical screen 200 and the auxiliary frame 500 in the projection screen 000 can be seen, so that the appearance of the front of the frame 100 is better.

[0095] In some specific embodiments, as shown in FIG26 , the auxiliary frame 500 in the projection screen 000 may further include: a third sheet structure 503 fixedly connected to the side of the second sheet structure 502 facing away from the first sheet structure 501, and the third sheet structure 503 may be located on the back of the frame 100. The third sheet structure 503 may be connected to the frame 100; or, after the rotating portion 300 rotates to the target position, the third sheet structure 503 may be connected to the frame 100 and the rotating portion 300 (e.g., a rotating member in the rotating portion) at the same time. In this case, in order to make the side of the projection screen 000 have a better appearance, the third sheet structure 503 may be provided in the auxiliary frame 500, and the third sheet structure 503 may be located on the back of the frame 100 to connect to the frame 100, so as to connect the auxiliary frame 500 to the frame 100.

[0096] In some specific embodiments, see FIG. 27 . The optical screen 200 in the projection screen 000 may include a flexible supporting layer 201 and multiple optical layers 202. The edges of the flexible supporting layer 201 may be connected to the rotating portion 300. In a direction perpendicular to the front surface of the optical screen 200, the first sheet structure 501 in the auxiliary frame 500 may cover at least the portion of the flexible supporting layer 201 connected to the rotating portion 300, and the first sheet structure 501 may be offset from at least some of the multiple optical layers 202. In this case, the first sheet structure 501 in the auxiliary frame 500 covers the portion of the flexible supporting layer 201 connected to the rotating portion 300, and the first sheet structure 501 may be offset from at least some of the multiple optical layers 202. In this way, the first sheet structure 501 not only decorates the front surface of the frame 100 but also maximizes the display area of ​​the optical layer 202 in the optical screen 200 used to display the projected image.

[0097] In some specific embodiments, referring to Figures 24 and 27 , at least some of the multiple optical layers 202 may be located on the side of the flexible supporting layer 201 close to the frame 100. In this way, at least some of the multiple optical layers can be protected by the flexible supporting layer 201. The multiple optical layers 202 in the optical screen 200 may include: a surface anti-light layer 202a located on the side of the flexible supporting layer 201 facing away from the frame 100; and a first adhesive layer 202b, a colored layer 202c, a second adhesive layer 202d, a base material layer 202e, a Fresnel lens layer 202f, and a reflective layer 202g stacked on the side of the flexible supporting layer 201 close to the frame 100. The colored layer 202c can be bonded to the side of the flexible supporting layer 201 closest to the frame 100 via a first adhesive layer 202b; the base layer 202e can be bonded to the side of the colored layer 202c closest to the frame 100 via a second adhesive layer 202d; and the Fresnel lens layer 202f and the reflective layer 202g can be formed on the side of the base layer 202e closest to the frame 100. Light can enter from the anti-glare surface layer 202a, pass through the other film layers, and ultimately be reflected by the reflective layer 202g before entering the user's eyes through the anti-glare surface layer 202a. In some embodiments, both the first adhesive layer 202b and the second adhesive layer 202d can be formed from optically clear adhesive. For example, the optically clear adhesive can be UV adhesive. The material of the base layer 202e can be the same as that of the flexible supporting layer 201, and will not be further described here.

[0098] In some specific embodiments, the flexible support layer 201 can be a PU flexible support layer made of polyurethane (English: Polyurethane; abbreviated: PU) material. PU is flexible and can be arbitrarily curled without deformation. It also has the advantages of wear resistance, high temperature resistance, high toughness, oil resistance, and strong mechanical properties. Using PU to make a PU flexible support layer makes the flexible support layer flexible and can be curled. In some other embodiments, the flexible support layer can also be made of other flexible materials. For example, a TPU flexible support layer can be made of thermoplastic polyurethane elastomer rubber (English: Thermoplastic polyurethanes; abbreviated: TPU) material. TPU has elasticity and can be curled. Using TPU to make a TPU flexible support layer can also make the flexible support layer flexible and can be curled. Alternatively, the flexible support layer 201 can be made of a flexible material such as polyethylene terephthalate (PET), styrene-based thermoplastic elastomers (SBCs), or other flexible materials, either of which can make the flexible support layer flexible and rollable. The material of the substrate layer 202e can be the same as that of the flexible support layer 201 and will not be further described here. In some specific embodiments, the first sheet structure 501 can cover the portion of the flexible support layer 201 connected to the rotating portion 300 and the portion of the anti-light surface layer 202a connected to the edge of the flexible support layer 201.

[0099] In some specific embodiments, in order to improve the light diffusion effect of the optical screen, the anti-light surface layer 202a is further provided with diffusion particles 202h, and the material of the diffusion particles 202h can be PMMA. In this way, the light can be diffused by the diffusion particles 202h during the process of entering and exiting the anti-light surface layer 202a, thereby improving the viewing angle of the optical screen 200. It should be noted that in other possible implementations, the anti-light surface layer 202a may not be provided with diffusion particles. The diffusion particles can be provided in the flexible support layer, the base material layer, the coloring layer, the adhesive layer and the Fresnel lens layer. Alternatively, a special diffusion layer (not shown in the figure) can also be provided in the optical screen, and the diffusion layer has a diffusion base layer, and the diffusion particles are distributed in the diffusion base layer.

[0100] The colored layer 202c in the optical screen 200 may include a colored base layer and a dark dye (not shown) disposed in the colored base layer. It should be noted that, when the colored layer is provided, it is not necessary to provide the dark dye in the anti-glare surface layer, the flexible support layer, the Fresnel lens layer, and the reflective layer to prevent excessive absorption of light energy and thus reduce the brightness of the optical screen.

[0101] It should be noted that for other possible implementations, please refer to Figure 28. The flexible support layer 201 in the optical screen 200 can be a synthetic fabric 201b, and the optical layer 202 can be a membrane attached to the side of the synthetic fabric 201b facing away from the frame. The rotating portion 300 can be connected to the edge of the synthetic fabric 201b, and the first sheet structure 501 can cover the portion of the synthetic fabric 201b connected to the rotating portion 300. The first sheet structure 501 can also be staggered with the membrane.

[0102] In some specific embodiments, as shown in Figures 27 and 28, a side e3 of the first sheet structure 501 in the auxiliary frame body 500, facing away from the second sheet structure 502, can be flush with a side e4 of at least some of the optical layers 202. In this case, by arranging the side e3 of the first sheet structure 501, facing away from the second sheet structure 502, to be flush with a side e4 of at least some of the optical layers 202, a narrow frame design is facilitated for the projection screen 000, while ensuring that the optical layer 202 has a maximum display area. In some specific embodiments, when the flexible supporting layer 201 is a synthetic cloth 201b, the side e3 of the first sheet structure 501 facing away from the second sheet structure 502 can be flush with the side of the diaphragm; when the flexible supporting layer 201 is a supporting layer made of materials such as PU or PET, the side e3 of the first sheet structure 501 facing away from the second sheet structure 502 can be flush with the side of the first adhesive layer 202b, the coloring layer 202c, the second adhesive layer 202d, the base material layer 202e, the Fresnel lens layer 202f and the reflective layer 202g.

[0103] In summary, embodiments of the present application provide a projection screen that may include a frame, an optical screen, and a rotating portion. When assembling the projection screen, an operator simply connects the rotating portion to the edge of the optical screen and applies a certain force to the rotating portion to enable it to rotate relative to the frame. During rotation relative to the frame, the rotating portion applies force to the edge of the optical screen, tightening the optical screen. After the rotating portion rotates to a target position, it is fixedly connected to the frame to maintain a constant tension. By applying a tensioning force to the optical screen, the projection screen is assembled. This reduces the difficulty of assembling the projection screen, effectively simplifying the assembly process and ensuring high assembly efficiency.

[0104] Furthermore, this improves the flatness of the front surface of the optical screen, ensuring a better display quality for the projected image displayed on the optical screen. Furthermore, by utilizing the rotational displacement of the rotating portion relative to the frame to achieve tensioning of the optical screen, the rotating portion does not fatigue after prolonged use, maintaining a good force exerted by the rotating portion on the optical screen, thereby achieving a better tensioning effect on the optical screen.

[0105] The present application also provides a laser projection system, which can be an ultra-short-throw laser projection system. In some specific embodiments, please refer to FIG. 29 . The laser projection system can include: a projection screen 000 and a laser projection device 001. Projection screen 000 can be any of the projection screens shown in the above embodiments.

[0106] In this way, when the laser projection device 001 is working, the laser projection device 001 can not only emit light obliquely upward, but also project an image onto the projection screen 000 .

[0107] In this application, the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless expressly limited otherwise.

[0108] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A projection screen, comprising: Frame, optical screen and rotating part; The frame has a front side and a back side opposite to each other, and at least a portion of the optical screen is located on the front side of the frame; The rotating part is assembled on the frame and connected to the edge of the optical screen. The rotating part can rotate relative to the frame, and the rotating part is fixedly connected to the frame after rotating to a target position. Wherein, the rotating part is configured to apply a tensioning force to the optical screen during the process of rotating relative to the frame.

2. The projection screen according to claim 1, wherein the optical screen and the rotating part are both located on the front side of the frame; The rotating portion is configured to apply a force toward an edge of the frame to the optical screen during rotation relative to the frame, so that the edge of the optical screen moves toward a direction close to the edge of the frame.

3. The projection screen according to claim 2, wherein the rotating part comprises: A carrier connected to the edge of the optical screen, and a rotating member connected to the carrier, the rotating member being rotatable relative to the frame; The supporting member has a first end connected to the edge of the optical screen, the rotating member has a second end rotatably connected to the frame, and the first end is located on a side of the second end close to the edge of the frame.

4. The projection screen according to claim 1, wherein the optical screen is attached to the front side of the frame, and the edge of the optical screen is folded over so that the optical screen wraps around the edge of the frame; The rotating part is located on the back side of the frame; The rotating portion is configured to apply a force to the optical screen away from an edge of the frame during rotation relative to the frame, so that the edge of the optical screen moves in a direction away from the edge of the frame.

5. The projection screen according to claim 4, wherein the rotating part comprises: A carrier connected to the edge of the optical screen, and a rotating member connected to the carrier, the rotating member being rotatable relative to the frame; The rotating member has a second end rotatably connected to the frame, the supporting member has a first end connected to the edge of the optical screen, and the second end is located on a side of the first end close to the edge of the frame.

6. The projection screen of claim 3, wherein the frame comprises: The bottom plate and the side plate are connected, the rotating member can rotate relative to the bottom plate, and after the rotating part rotates to the target position, the connection method between the frame and the rotating part includes: the bottom plate is connected to the rotating member, the supporting member is connected to the side plate, and the bottom plate is connected to the rotating member, and the supporting member is connected to the side plate.

7. The projection screen according to claim 6, wherein a side of the side plate facing away from the bottom plate has a first limiting groove; The rotating part also includes: A first limiting member, wherein the first limiting member is fixedly connected to a side of an edge of the supporting member away from the optical screen; The frame further comprises a second limiting member, wherein the second limiting member is located in the first limiting groove; Wherein, after the rotating portion rotates to the target position, the first limiting member is engaged with the second limiting member in the first limiting groove.

8. The projection screen according to claim 6, wherein the side of the bottom plate facing the optical screen has a first bearing groove, at least a portion of the rotating member is located in the first bearing groove, and an end of the rotating member facing away from the bearing member is rotatably connected to the first bearing groove.

9. The projection screen according to claim 8, wherein after the rotating part rotates to the target position, the relative position between the frame and the rotating part comprises: The supporting member is in contact with a side of the side panel close to the optical screen, the rotating member is in contact with a bottom surface of the first supporting groove, and the supporting member is in contact with a side of the side panel close to the optical screen, and the rotating member is in contact with at least one relative position of the bottom surface of the first supporting groove.

10. The projection screen according to any one of claims 2, 3 and 6-9, further comprising: An auxiliary frame body connected to the frame; The auxiliary frame comprises: a first sheet-like structure and a second sheet-like structure, wherein the first sheet-like structure is located on a side of the rotating part away from the frame in a direction perpendicular to the front surface of the optical screen; The second sheet-like structure is located on a side of the frame facing away from the rotating part in a direction parallel to the front side of the optical screen; Wherein, a portion of the edge of the first sheet-like structure is fixedly connected to one side of the second sheet-like structure.

11. The projection screen according to claim 10, wherein the auxiliary frame further comprises: a third sheet structure, the third sheet structure being located on the back of the frame, and the third sheet structure being fixedly connected to a side of the second sheet structure facing away from the first sheet structure; The third sheet-like structure is connected to the frame, or, after the rotating part rotates to the target position, the third sheet-like structure is connected to the frame and the rotating part at the same time.

12. The projection screen according to claim 10, wherein the optical screen comprises: a flexible supporting layer and a plurality of optical layers, at least part of the plurality of optical layers being located on a side of the flexible supporting layer close to the frame, and an edge of the flexible supporting layer being connected to the rotating portion; Wherein, in a direction perpendicular to the front surface of the optical screen, the first sheet-like structure at least covers a portion of the flexible supporting layer connected to the rotating part, and the first sheet-like structure is staggered with at least a portion of the multiple optical layers.

13. The projection screen according to claim 5, wherein the back of the frame has a second bearing groove, at least a portion of the rotating portion is located in the second bearing groove, and an end of the rotating member facing away from the bearing member is rotatably connected to the second bearing groove.

14. The projection screen according to claim 13, wherein the frame further comprises a guide member and a connecting member, wherein the guide member and the connecting member are respectively located on two sides of the second bearing groove, and the guide member is located on a side of the connecting member close to an edge of the frame; in, The guide member is used to contact the optical screen during the folding process of the edge of the optical screen, and the connecting member is used to connect with the rotating part rotated to the target position. 15 . The projection screen according to claim 14 , wherein at least a portion of a surface of the guide member in contact with the optical screen is an arc-shaped convex surface, and the arc-shaped convex surface protrudes toward the optical screen.

16. The projection screen according to claim 14, wherein the side of the connecting member facing away from the front side of the optical screen has a second limiting groove, The rotating part further includes a first limiting member, and the first limiting member is fixedly connected to a side of the edge of the supporting member away from the optical screen; The frame further comprises a second limiting member, wherein the second limiting member is located in the second limiting groove; in, After the rotating portion rotates to the target position, the first limiting member is engaged with the second limiting member in the second limiting groove.

17. The projection screen according to claim 3 or 5, wherein the edge of the frame has a snap-fit ​​groove, and the second end of the rotating member is located in the snap-fit ​​groove and abuts against an inner wall of the snap-fit ​​groove.

18. The projection screen according to claim 16, wherein the snap-in slot has a first plane and a second plane connected thereto, the first plane is parallel to the front surface of the optical screen, and the angle between the first plane and the second plane is an acute angle.

19. The projection screen according to claim 3 or 5, wherein the rotating part further comprises: A connecting shaft is connected to the second end of the rotating member, and the connecting shaft is rotatably connected to the edge of the frame.

20. The projection screen according to any one of claims 10 to 14, wherein the optical screen comprises: A flexible supporting layer and a plurality of optical layers, wherein the edge of the flexible supporting layer is folded so that the flexible supporting layer wraps around the edge of the frame; At least part of the plurality of optical layers is located on a side of the flexible supporting layer close to the frame.

21. A laser projection system, comprising: A projection screen and a laser projection device, wherein the laser projection device is used to project an image onto the projection screen, and the projection screen comprises the projection screen described in any one of claims 1-20.

Images