Projection screen

Abstract

The utility model discloses a projection screen, and belongs to the technical field of display. The projection screen comprises a frame, a flexible optical screen and a sliding part. And the frame in the projection screen and the flexible optical screen are designed into an integral structure. The frame is composed of two sets of oppositely-arranged folding frames and two sets of oppositely-arranged first supporting frames and second supporting frames, and a first sub-frame and a second sub-frame in each folding frame can be connected through a rotating mechanism. When the projection screen needs to be assembled, a user can rotate the first sub-frame in each folding frame relative to the second sub-frame through the rotating mechanism, so that the whole frame is unfolded. And then, the flexible optical screen can be stretched by simply pulling the sliding part, so that the installation of the projection screen can be completed. Therefore, the assembly difficulty of the projection screen can be reduced, the assembly process of the projection screen is effectively simplified, and the assembly efficiency of the projection screen can be ensured to be relatively high.

Description

Technical Field

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

[0002] With the continuous development of technology, projection equipment is increasingly being used in consumers' work and daily lives. Currently, projection equipment mainly consists of a projection host and a projection screen. The light outlet of the projection host faces the projection screen, emitting a light beam to the projection screen, which receives the light beam to display the image.

[0003] In the related art, the size of projection screens is getting larger and larger, and the space occupied by the projection screens is also getting larger, which makes it more difficult to transport the projection screens. In order to reduce the difficulty of transportation, the projection screens are usually prepared as detachable projection screens.

[0004] However, the current assembly process of such a detachable projection screen is relatively complicated, resulting in low assembly efficiency of the projection screen. Utility Model Content

[0005] The present invention provides a projection screen that can solve the problem of low assembly efficiency of existing projection screens. The technical solution is as follows:

[0006] In one aspect, a projection screen is provided, comprising:

[0007] Frame, flexible optical screen and sliding part;

[0008] The frame has a bearing surface, and includes: two folding frames arranged opposite to each other and a first supporting frame and a second supporting frame arranged opposite to each other; each of the folding frames includes: a first sub-frame and a second sub-frame, and a rotating mechanism located between the first sub-frame and the second sub-frame; an end of the first sub-frame facing away from the second sub-frame is connected to an end of the first supporting frame, and an end of the second sub-frame facing away from the first sub-frame is connected to an end of the second supporting frame; the rotating mechanism is used to drive the first sub-frame to fold or unfold relative to the second sub-frame around an axis parallel to the bearing surface;

[0009] The sliding portion is located between the two folding frames and is slidably connected to the two folding frames;

[0010] The flexible optical screen is attached to the supporting surface, and the flexible optical screen has two first side edges and two second side edges that are oppositely arranged. The two first side edges are respectively slidably connected to the two folding frames, one of the two second side edges is connected to the first supporting frame, and the other of the two second side edges is connected to the sliding portion.

[0011] In which, the sliding part is configured to: move relative to the two folding frames to expand or contract the flexible optical screen; after the flexible optical screen is in the expanded state, the sliding part is connected to the second supporting frame; after the flexible optical screen is in the contracted state, the flexible optical screen and the sliding part are both located between the two first sub-frames.

[0012] Optionally, the flexible optical screen includes: a flexible curtain, an optical film and a plurality of support bars;

[0013] The flexible screen has two first side edges and two second side edges; the optical film is connected to a side of the flexible screen facing away from the supporting surface; the plurality of support bars are connected to a side of the flexible screen facing away from the optical film, and the plurality of support bars are arranged at intervals in the extension direction of the folding frame;

[0014] Wherein, after the flexible optical screen is in a contracted state, a portion of the optical film distributed between two adjacent support bars can be bent.

[0015] Optionally, the flexible screen has a first hollow area located in the central area, and both ends of each of the support bars are respectively connected to positions of the flexible screen near the two first side edges, and a portion of each of the support bars located in the first hollow area is in contact with the optical film;

[0016] Alternatively, the flexible curtain has a second hollow area distributed between two adjacent support bars.

[0017] Optionally, the sliding part includes: a sliding frame, and a first support rod installed on the sliding frame; the sliding frame is located between the two folding frames and is slidingly connected to the two folding frames; the first support rod is connected to the second side edge of the two second side edges of the flexible optical screen that is away from the first support frame.

[0018] Optionally, a side of the folding frame facing the sliding frame has a sliding groove, and a portion of the sliding frame facing the folding frame is located in the sliding groove and is slidably connected to the sliding groove.

[0019] Optionally, the sliding part further includes: a plurality of elastic members, which are arranged in sequence along the extension direction of the first support rod, one end of each of the elastic members is connected to the sliding frame, and the other end of each of the elastic members is connected to the first support rod.

[0020] Optionally, the frame further comprises: at least two connecting members;

[0021] Wherein, after the flexible optical screen is in the unfolded state, the sliding frame is connected to the second supporting frame through the at least two connecting members, and the at least two connecting members are distributed on both sides of the first supporting rod in the extension direction of the first supporting rod.

[0022] Optionally, the first sub-frame has a first accommodating cavity, the second sub-frame has a second accommodating cavity, and the first supporting frame has a third accommodating cavity;

[0023] The frame further includes: a second support rod suspended and fixed in the first accommodating cavity, a third support rod suspended and fixed in the second accommodating cavity, and a fourth support rod suspended and fixed in the third accommodating cavity;

[0024] The first side edge of the flexible optical screen is slidably connected to the second support rod and to the third support rod; the second side edge of the two second side edges of the flexible optical screen that faces away from the sliding portion is connected to the fourth support rod.

[0025] Optionally, after the first sub-frame and the second sub-frame are unfolded, the axis of the second support rod coincides with the axis of the third support rod.

[0026] Optionally, the frame further comprises: a first corner fixing block fixed between the first supporting frame and the folding frame, and a second corner fixing block fixed between the second supporting frame and the folding frame;

[0027] Wherein, the first corner fixing block is fixedly connected to the second support rod and the fourth support rod, and the second corner fixing block is fixedly connected to the third support rod.

[0028] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0029] The frame and the flexible optical screen in the projection screen are designed as an integral structure. The frame consists of two sets of folding frames arranged opposite to each other and two sets of first supporting frames and second supporting frames arranged opposite to each other. The first sub-frame and the second sub-frame in each folding frame can be connected by a rotating mechanism. When the projection screen needs to be assembled, the user can rotate the first sub-frame in each folding frame relative to the second sub-frame through the rotating mechanism to unfold the entire frame. Afterwards, the installation of the projection screen can be completed by simply pulling the sliding part to extend the flexible optical screen. In this way, the difficulty of assembling the projection screen can be reduced, the assembly process of the projection screen can be effectively simplified, and the assembly efficiency of the projection screen can be ensured to be high. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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.

[0031] Figure 1 This is a schematic structural diagram of a projection screen provided by an embodiment of the present application;

[0032] Figure 2 This is a diagram showing the effect of a flexible optical screen in a projection screen provided by an embodiment of the present application after contraction;

[0033] Figure 3 This is a schematic structural diagram of a flexible optical screen provided by the present application;

[0034] Figure 4 This is a schematic structural diagram of another projection screen provided in an embodiment of the present application;

[0035] Figure 5 yes Figure 3 An exploded view of the flexible optical screen is shown;

[0036] Figure 6 is a cross-sectional view of a projection screen in a retracted state provided by an embodiment of the present application;

[0037] Figure 7 is a cross-sectional view of a projection screen in an unfolded state provided by an embodiment of the present application;

[0038] Figure 8 is a cross-sectional view of another projection screen provided by an embodiment of the present application in an unfolded state;

[0039] Figure 9 is a partial cross-sectional view of a projection screen provided in an embodiment of the present application;

[0040] Figure 10 is a partial cross-sectional view of another projection screen provided in an embodiment of the present application;

[0041] Figure 11 This is an exploded view of a frame provided in an embodiment of the present application;

[0042] Figure 12 is a partial cross-sectional view of another projection screen provided in an embodiment of the present application;

[0043] Figure 13 Schematic diagram of the structure of a laser projection system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] 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.

[0045] Please refer to Figure 1 、 Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the structure of a projection screen provided in an embodiment of the present application. Figure 2 This is a diagram showing the effect of a flexible optical screen in a projection screen provided by an embodiment of the present application after contraction. Figure 3 Schematic diagram of a flexible optical screen provided by the present application. The projection screen 000 may include: a frame 100, a flexible optical screen 200 and a sliding portion 300.

[0046] The frame 100 in the projection screen 000 has a bearing surface. After the frame 100 is flattened, the bearing surface of the frame 100 can be a surface for bearing the flexible optical screen 200 in the projection screen 000 . Figure 1 The figure shows a rear view of the projection screen 000, in which the frame 100 has a side K disposed opposite the supporting surface. The frame 100 in the projection screen 000 may include: two folding frames A disposed opposite each other and a first supporting frame B and a second supporting frame C disposed opposite each other. Each folding frame A includes: a first sub-frame A1 and a second sub-frame A2, and a rotation mechanism A3 located between the first sub-frame A1 and the second sub-frame A2; the end of the first sub-frame A1 facing away from the second sub-frame A2 is connected to the end of the first supporting frame B, and the end of the second sub-frame A2 facing away from the first sub-frame A1 is connected to the end of the second supporting frame C. The rotation mechanism A3 can be used to drive the first sub-frame A1 to fold or unfold relative to the second sub-frame A2 around an axis L1 parallel to the supporting surface.

[0047] The sliding portion 300 in the projection screen 000 may be located between the two folding frames A and be connected to the two folding frames A in a sliding manner.

[0048] The flexible optical screen 200 in the projection screen 000 can be attached to the supporting surface. The flexible optical screen 200 can have two first side edges E1 and two second side edges E2 that are relatively set. The two first side edges E1 are respectively slidably connected to the two folding frames A, one of the two second side edges E2 is connected to the first supporting frame B, and the other second side edge E2 of the two second side edges E2 is connected to the sliding part 300.

[0049] In the present application, the sliding portion 300 in the projection screen 000 can be configured to move relative to the two folding frames A to expand or contract the flexible optical screen 200. When the flexible optical screen 200 is in the expanded state, the sliding portion 300 is connected to the second supporting frame C; when the flexible optical screen 200 is in the contracted state, the flexible optical screen 200 and the sliding portion 300 are both located between the two first sub-frames A1.

[0050] In an embodiment of the present application, the frame 100 and the flexible optical screen 200 in the projection screen 000 are designed as an integral structure. The frame 100 is composed of two groups of relatively arranged folding frames A and two groups of relatively arranged first supporting frames B and second supporting frames C. The first sub-frame A1 and the second sub-frame A2 in each folding frame A can be connected by a rotating mechanism A3. When the projection screen 000 needs to be assembled, the user can rotate the first sub-frame A1 in each folding frame A relative to the second sub-frame A2 through the rotating mechanism A3, thereby achieving the unfolding of the entire frame 100. Subsequently, the installation of the projection screen 000 can be completed by simply pulling the sliding part 300 to extend the flexible optical screen 200. In this way, the difficulty of assembling the projection screen 000 can be reduced, the assembly process of the projection screen 000 can be effectively simplified, and the assembly efficiency of the projection screen 000 can be ensured to be high.

[0051] In summary, an embodiment of the present application provides a projection screen, comprising: a frame, a flexible optical screen and a sliding portion. The frame and the flexible optical screen in the projection screen are designed as an integral structure. The frame is composed of two groups of relatively arranged folding frames and two groups of relatively arranged first supporting frames and second supporting frames, and the first sub-frame and the second sub-frame in each folding frame can be connected by a rotating mechanism. When the projection screen needs to be assembled, the user can rotate the first sub-frame in each folding frame relative to the second sub-frame through the rotating mechanism, thereby achieving the unfolding of the entire frame. Subsequently, the installation of the projection screen can be completed by simply pulling the sliding portion to extend the flexible optical screen. In this way, the difficulty of assembling the projection screen can be reduced, the assembly process of the projection screen can be effectively simplified, and the assembly efficiency of the projection screen can be ensured to be high.

[0052] In the examples of this application, please refer to Figure 4 , Figure 4 Schematic diagram of another projection screen structure provided by an embodiment of the present application. The rotation mechanism A3 in each folding frame A may include: an adapter A31, a first rotation axis A32, and a second rotation axis A33. The first sub-frame A1 in each folding frame A can be rotatably connected to one side of the adapter A31 via the first rotation axis A32, and the second sub-frame A2 in each folding frame A can be rotatably connected to the other side of the adapter A31 via the second rotation axis A33. The axis centerline of the first rotation axis A32 is parallel to the axis centerline of the second rotation axis A33, and is also parallel to the bearing surface.

[0053] Optionally, each of the first sub-frame A1 and the second sub-frame A2 in the folding frame A has a notch P at the first end, and the two notches P are respectively a first notch P1 and a second notch P2. After the first sub-frame A1 and the second sub-frame A2 are unfolded, the first notch P1 and the second notch P2 can be used to form a clearance groove (not shown), and at least a portion of the adapter A31 can be located within the clearance groove. In this way, after the frame 100 is unfolded, part of the structure of the adapter A31 can be hidden within the clearance groove, thereby improving the compactness of the projection screen 000 structure.

[0054] During actual use of the projection screen 000, when it is necessary to fold the projection screen 000, first, the sliding portion 300 is pulled so that the flexible optical screen 200 and the sliding portion 300 are both located between the two first sub-frames A1. Then, the rotating mechanism A3 is used to rotate the first sub-frame A1 and the adjacent second sub-frame A2 around an axis L1 parallel to the support surface until the two are completely aligned. In this way, the projection screen 000 can be effectively folded into a smaller size, facilitating transportation and reducing transportation costs. When the projection screen 000 needs to be assembled, the first sub-frame A1 in each folding frame A can be rotated relative to the second sub-frame A2 using the rotating mechanism A3, thereby unfolding the entire frame 100. Subsequently, the installation of the projection screen 000 can be completed by simply pulling the sliding portion 300 to extend the flexible optical screen 200. This reduces the difficulty of assembling the projection screen 000, allowing users to quickly and easily complete assembly after receiving the product, thereby improving the user experience.

[0055] In the examples of this application, please refer to Figure 5 and Figure 6 , Figure 5 yes Figure 3 The exploded view of the flexible optical screen is shown. Figure 6 The flexible optical screen 200 in the projection screen 000 may include a flexible curtain 201 , an optical film 202 , and a plurality of support bars 203 .

[0056] The flexible screen 201 in the flexible optical screen 200 may have two first side edges E1 and two second side edges E2. The optical film 202 in the flexible optical screen 200 may be connected to the side of the flexible screen 201 facing away from the supporting surface. Multiple support bars 203 in the flexible optical screen 200 may be connected to the side of the flexible screen 201 facing away from the optical film 202, and the multiple support bars 203 are arranged in intervals along the extension direction of the folding frame A.

[0057] When the flexible optical screen 200 in the projection screen 000 is in the contracted state, the portion of the optical film 202 distributed between two adjacent support bars 203 can be bent.

[0058] In this case, because the optical film 202 typically has special optical properties, after the optical film 202 is connected to the side of the flexible screen 201 facing away from the supporting surface, the flexible optical screen 200 can display images of better quality, helping to enhance the viewing experience. Furthermore, the multiple support bars 203 provided on the side of the flexible screen 201 facing away from the optical film 202 can provide the necessary rigid support for the flexible optical screen 200, preventing it from being deformed due to other external forces.

[0059] Optionally, the flexible curtain 201 in the flexible optical screen 200 may have a variety of structures. For clarity of explanation, the present application will use the following two optional implementations as examples for schematic illustration:

[0060] For the first optional implementation, please refer to Figure 7 , Figure 7 This is a cross-sectional view of a projection screen in its unfolded state provided by an embodiment of the present application. The flexible screen 201 in the flexible optical screen 200 may have a first hollowed-out area U1 located in the central region. The ends of each support bar 203 are connected to the flexible screen 201 near two first side edges E1, and the portion of each support bar 203 located within the first hollowed-out area U1 contacts the optical film 202.

[0061] For the second optional implementation, please refer to Figure 8 , Figure 8 The flexible curtain 201 in the flexible optical screen 200 may have a second hollow area U2 distributed between two adjacent support bars 203 .

[0062] In this case, whether a first hollow area U1 or a second hollow area U2 is set on the flexible curtain 201, the material thickness of the area can be reduced, thereby reducing the resistance when the flexible optical screen 200 is folded, so that the flexible optical screen 200 can bend more smoothly, avoiding wrinkles or unevenness caused by material accumulation.

[0063] In the embodiments of this application, Figure 8 As shown, the sliding part 300 in the projection screen 000 may include: a sliding frame 301, and a first support rod 302 installed on the sliding frame 301; the sliding frame 301 is located between the two folding frames A and is slidingly connected to the two folding frames A; the first support rod 302 is connected to the second side edge E2 of the two second side edges E2 of the flexible optical screen 200 that faces away from the first support frame B.

[0064] In this case, the relative sliding between the sliding frame 301 and the two folding frames A can drive the first support rod 302 to move. Because the first support rod 302 is connected to the second side edge E2 of the two second side edges E2 of the flexible optical screen 200 that faces away from the first support frame B, the movement of the sliding frame 301 drives the flexible optical screen 200 to move accordingly, thereby achieving the expansion and contraction of the flexible optical screen 200.

[0065] Optional, please refer to Figure 9 , Figure 9 This is a partial cross-sectional view of a projection screen provided by an embodiment of the present application. A side of the folding frame A in the frame 100 facing the sliding frame 301 may have a slide groove P, and the portion of the sliding frame 301 facing the folding frame A is located within the slide groove P and is slidably connected to the slide groove P.

[0066] In this case, by sliding the sliding frame 301 in the sliding groove P, it can not only provide a reliable guiding function for the sliding frame 301, but also ensure that the sliding frame 301 moves smoothly during the sliding process, reducing friction resistance, thereby improving the smoothness of the operation of the projection screen 000.

[0067] In the embodiments of this application, Figure 8 As shown, the sliding portion 300 in the projection screen 000 may further include: a plurality of elastic members 303, which may be arranged sequentially along the extension direction of the first support rod 302. One end of each elastic member 303 is connected to the sliding frame 301, and the other end of each elastic member 303 is connected to the first support rod 302. For example, the elastic members 303 may be springs. In this way, the elastic members 303 can absorb the impact and vibration generated by the sliding frame 301 during the sliding process, thereby protecting the flexible optical screen 200 and other components from damage.

[0068] Optional, please refer to Figure 10 , Figure 10 1 is a partial cross-sectional view of another projection screen provided by an embodiment of the present application. The frame 100 in the projection screen 000 may further include: at least two connecting members 101. For example, the connecting members 101 may be adjustment screws.

[0069] When the flexible optical screen 200 is in the unfolded state, the sliding frame 301 is connected to the second support frame C through at least two connectors 101 , and the at least two connectors 101 are distributed on both sides of the first support rod 302 in the extension direction of the first support rod 302 .

[0070] In this way, the connection between the second support frame C and the sliding frame 301 can be achieved by passing the connecting member 101 through the through hole (not shown) on the second support frame C and screwing it into the threaded hole (not shown) on the sliding frame 301. And by continuously rotating the connecting member 101, the connection between the sliding frame 301 and the second support frame C can be made more secure to prevent loosening. In addition, the distance between the second support frame C and the sliding frame 301 can be adjusted by adjusting the screw-in depth. Among them, the deeper the screw-in depth, the smaller the distance between the second support frame C and the sliding frame 301, so that a greater tension can be applied to the flexible optical screen 200 to ensure that the flexible optical screen 200 has a high degree of flatness.

[0071] In the examples of this application, please refer to Figure 11 , Figure 11 This is an exploded view of a frame provided by an embodiment of the present application. The first sub-frame A1 in the folding frame A may have a first accommodating cavity Q1, the second sub-frame A2 may have a second accommodating cavity Q2, and the first supporting frame B may have a third accommodating cavity Q3.

[0072] The frame 100 in the projection screen 000 may further include: a second support rod 102 suspended and fixed in the first accommodating cavity Q1, a third support rod 103 suspended and fixed in the second accommodating cavity Q2, and a fourth support rod 104 suspended and fixed in the third accommodating cavity Q3.

[0073] Among them, the first side edge E1 of the flexible optical screen 200 is slidingly connected to the second support rod 102 and the third support rod 103; the second side edge E2 of the two second side edges E2 of the flexible optical screen 200 away from the sliding part 300 is connected to the fourth support rod 104.

[0074] In the embodiment of the present application, since the first sub-frame A1, the second sub-frame A2, and the first supporting frame B in the frame 100 have the same form, the first supporting frame B in the frame 100 is taken as an example. Figure 12 , Figure 12This is a partial cross-sectional view of another projection screen provided in an embodiment of the present application. The frame 100 in the projection screen 000 may include: an inner frame 110 and an outer frame 120 that are fixedly connected. A third accommodating cavity Q3 and an entry channel Z connected to the third accommodating cavity Q3 may be formed between the inner frame 110 and the outer frame 120. The second side edge E2 of the two second side edges E2 of the flexible optical screen 200, which faces away from the second support frame C, can enter the third accommodating cavity Q3 through the entry channel Z and connect to the fourth support rod 104 in the third accommodating cavity Q3.

[0075] It should be noted that if Figure 10 As shown, the frame connected to the second side edge E2 of the two second side edges E2 of the flexible optical screen 200 that faces away from the first supporting frame B includes an inner frame and an outer frame that are separately provided. The inner frame can be the sliding frame 301 in the sliding part 300, and the outer frame can be the second supporting frame in the frame 100. The inner frame and the outer frame can be fixed together by at least two connecting members 101. The inner frame and the outer frame of the first sub-frame A1, the second sub-frame A2, and the first supporting frame B in the frame 100 are integrally formed.

[0076] In related art, the frame of a projection screen typically adopts a rectangular structure, consisting of four support rods, each corresponding to one of the four sides of the frame. Each support rod is located at a corresponding side of the frame and is connected to the flexible screen via multiple springs. These springs apply uniform tension to the support rods, ensuring that the flexible screen is taut and remains flat.

[0077] In this application, the inner frame 110 and the outer frame 120 are designed as an integrated structure, and a third receiving cavity Q3 is formed between the inner and outer frames 110, 120 to accommodate the fourth support rod 104. Thus, by securing the fourth support rod 104 within the third receiving cavity Q3, the flexible optical screen 200 is kept in a taut state, thereby improving the flatness of the flexible optical screen 200. This further reduces the difficulty of assembling the projection screen 000, effectively simplifying the assembly process and ensuring a high degree of assembly efficiency.

[0078] In the embodiment of the present application, a plurality of first accommodating pockets are provided on the first side edge E1, and the plurality of first accommodating pockets can be sleeved on the second support rod 102 and the third support rod 103, and the plurality of accommodating pockets are separately provided on the second support rod 102 and the third support rod 103. Exemplarily, the plurality of accommodating pockets correspond one-to-one to the support bar 203, so as to avoid interference between two adjacent accommodating pockets during the extension and contraction of the flexible optical screen 200. A second accommodating pocket is provided on the second side edge E2, and a second accommodating pocket provided on one second side edge E2 can be sleeved on the fourth support rod 104, and a second accommodating pocket provided on another second side edge E2 can be sleeved on the first support rod 302, and the number of accommodating pockets sleeved on the first support rod 302 is multiple, so that the elastic member 303 can be hung on the first support rod 302 between two adjacent accommodating pockets.

[0079] Since the second support rod 102 is suspended and fixed in the first accommodating cavity Q1, the third support rod 103 is suspended and fixed in the second accommodating cavity Q2, and the fourth support rod 104 is suspended and fixed in the third accommodating cavity Q3, it can be ensured that the accommodating pockets sleeved on the second support rod 102, the third support rod 103 and the fourth support rod 104 will not interfere with the inner wall of the accommodating cavity.

[0080] Optional, such as Figure 11 As shown, after the first sub-frame A1 and the second sub-frame A2 in the folding frame A are unfolded, the axis center line of the second support rod 102 coincides with the axis center line of the third support rod 103 .

[0081] In this case, since the axis lines of the second support rod 102 and the third support rod 103 coincide, the flexible optical screen 200 can slide smoothly along a straight line when expanding or contracting, reducing the jamming or unevenness during the sliding process and improving the smoothness of the operation.

[0082] In the embodiments of this application, Figure 11 As shown, the frame 100 in the projection screen 000 may further include: a first corner fixing block 105 fixed between the first supporting frame B and the folding frame A, and a second corner fixing block 106 fixed between the second supporting frame C and the folding frame A. For example, the number of the first corner fixing block 105 and the number of the second corner fixing block 106 are both two.

[0083] The first corner fixing block 105 is fixedly connected to the second support rod 102 and the fourth support rod 104 , and the second corner fixing block 106 is fixedly connected to the third support rod 103 .

[0084] In this case, the first corner fixing block 105 and the second corner fixing block 106 can provide suspension points for the second support rod 102, the third support rod 103, and the fourth support rod 104, so that these support rods can be suspended in the accommodating cavity without contacting the inner wall of the frame 100. In this way, the friction between each support rod and the inner wall of the frame 100 can be reduced, thereby making the movement of the flexible optical screen 200 smoother when expanding and contracting.

[0085] In summary, an embodiment of the present application provides a projection screen, comprising: a frame, a flexible optical screen and a sliding portion. The frame and the flexible optical screen in the projection screen are designed as an integral structure. The frame is composed of two groups of relatively arranged folding frames and two groups of relatively arranged first supporting frames and second supporting frames, and the first sub-frame and the second sub-frame in each folding frame can be connected by a rotating mechanism. When the projection screen needs to be assembled, the user can rotate the first sub-frame in each folding frame relative to the second sub-frame through the rotating mechanism, thereby achieving the unfolding of the entire frame. Subsequently, the installation of the projection screen can be completed by simply pulling the sliding portion to extend the flexible optical screen. In this way, the difficulty of assembling the projection screen can be reduced, the assembly process of the projection screen can be effectively simplified, and the assembly efficiency of the projection screen can be ensured to be high.

[0086] The present application also provides a laser projection system, which can be an ultra-short-throw laser projection system. Figure 13 As shown, Figure 13 Schematic diagram of a laser projection system according to an embodiment of the present application. The laser projection system may include a projection screen 000 and a laser projection device 010. Projection screen 000 may be the projection screen described in the aforementioned embodiment. Laser projection device 010 may be electrically connected to an actuator (not shown) within projection screen 000.

[0087] In this way, when the laser projection device 010 is working, the laser projection device 010 can not only emit light obliquely upward, so that the laser projection device 010 can project an image onto the projection screen 000; the laser projection device 010 can also send a sound electrical signal to the exciter in the projection screen 000, so that the projection screen 000 can make a sound while displaying the projected image.

[0088] In this application, the terms "first" and "second" 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.

[0089] 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, characterized in that: include: Frame, flexible optical screen and sliding part; The frame has a bearing surface, and includes: two folding frames arranged opposite to each other and a first supporting frame and a second supporting frame arranged opposite to each other; each of the folding frames includes: a first sub-frame and a second sub-frame, and a rotating mechanism located between the first sub-frame and the second sub-frame; an end of the first sub-frame facing away from the second sub-frame is connected to an end of the first supporting frame, and an end of the second sub-frame facing away from the first sub-frame is connected to an end of the second supporting frame; the rotating mechanism is used to drive the first sub-frame to fold or unfold relative to the second sub-frame around an axis parallel to the bearing surface; The sliding portion is located between the two folding frames and is slidably connected to the two folding frames; The flexible optical screen is attached to the supporting surface, and the flexible optical screen has two first side edges and two second side edges that are oppositely arranged. The two first side edges are respectively slidably connected to the two folding frames, one of the two second side edges is connected to the first supporting frame, and the other of the two second side edges is connected to the sliding portion. In which, the sliding part is configured to: move relative to the two folding frames to expand or contract the flexible optical screen; after the flexible optical screen is in the expanded state, the sliding part is connected to the second supporting frame; after the flexible optical screen is in the contracted state, the flexible optical screen and the sliding part are both located between the two first sub-frames.

2. The projection screen according to claim 1, wherein The flexible optical screen includes: a flexible curtain, an optical film and a plurality of support bars; The flexible screen has two first side edges and two second side edges; the optical film is connected to a side of the flexible screen facing away from the supporting surface; the plurality of support bars are connected to a side of the flexible screen facing away from the optical film, and the plurality of support bars are arranged at intervals in the extension direction of the folding frame; Wherein, after the flexible optical screen is in a contracted state, a portion of the optical film distributed between two adjacent support bars can be bent.

3. The projection screen according to claim 2, characterized in that The flexible screen has a first hollow area located in the central area, and both ends of each of the support bars are respectively connected to positions of the flexible screen near the two first side edges, and a portion of each of the support bars located in the first hollow area is in contact with the optical film; Alternatively, the flexible curtain has a second hollow area distributed between two adjacent support bars.

4. The projection screen according to any one of claims 1 to 3, characterized in that: The sliding part includes: a sliding frame, and a first support rod installed on the sliding frame; the sliding frame is located between the two folding frames and is slidably connected to the two folding frames; the first support rod is connected to the second side edge of the two second side edges of the flexible optical screen that is away from the first support frame.

5. The projection screen according to claim 4, characterized in that A side of the folding frame facing the sliding frame is provided with a sliding groove, and a portion of the sliding frame facing the folding frame is located in the sliding groove and is slidably connected to the sliding groove.

6. The projection screen according to claim 4, characterized in that The sliding portion further includes: a plurality of elastic members, which are arranged in sequence along the extension direction of the first support rod, one end of each elastic member is connected to the sliding frame, and the other end of each elastic member is connected to the first support rod.

7. The projection screen according to claim 6, characterized in that The frame further comprises: at least two connecting members; Wherein, after the flexible optical screen is in the unfolded state, the sliding frame is connected to the second supporting frame through the at least two connecting members, and the at least two connecting members are distributed on both sides of the first supporting rod in the extension direction of the first supporting rod.

8. The projection screen according to any one of claims 1 to 3 and 5 to 7, characterized in that: The first sub-frame has a first accommodating cavity, the second sub-frame has a second accommodating cavity, and the first supporting frame has a third accommodating cavity; The frame further includes: a second support rod suspended and fixed in the first accommodating cavity, a third support rod suspended and fixed in the second accommodating cavity, and a fourth support rod suspended and fixed in the third accommodating cavity; The first side edge of the flexible optical screen is slidably connected to the second support rod and to the third support rod; the second side edge of the two second side edges of the flexible optical screen that faces away from the sliding portion is connected to the fourth support rod.

9. The projection screen according to claim 8, characterized in that After the first sub-frame and the second sub-frame are unfolded, the axis of the second support rod coincides with the axis of the third support rod.

10. The projection screen according to claim 8, characterized in that The frame further comprises: a first corner fixing block fixed between the first supporting frame and the folding frame, and a second corner fixing block fixed between the second supporting frame and the folding frame; Wherein, the first corner fixing block is fixedly connected to the second support rod and the fourth support rod, and the second corner fixing block is fixedly connected to the third support rod.

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