Projection screen

Abstract

The application 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. 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 oppositely arranged folding frames and two groups of oppositely arranged first supporting frames and second supporting frames. The first sub-frame and the 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 relative to the second sub-frame in each folding frame through the rotating mechanism, so that the whole frame is unfolded. Then, the installation of the projection screen can be completed by simply pulling the sliding part to stretch the flexible optical screen. In this way, 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 high.

Description

Technical Field

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

[0002] With the continuous development of technology, projection devices are increasingly being used in consumers' work and daily lives. Currently, projection devices mainly consist of a projector and a projection screen. The projector's light output port faces the projection screen to emit a light beam, which the projection screen then receives to display the image.

[0003] In related technologies, projection screens are becoming increasingly larger, occupying more space and making transportation more difficult. To reduce transportation difficulties, projection screens are typically manufactured as detachable devices.

[0004] However, the current assembly process for detachable projection screens is quite complex, resulting in low assembly efficiency. Summary of the Invention

[0005] This application provides a projection screen. It can solve the problem of low assembly efficiency in existing projection screens. The technical solution is as follows:

[0006] On the one hand, a projection screen is provided, including:

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

[0008] The frame has a load-bearing surface and includes: two folded side frames disposed opposite to each other and a first support side frame and a second support side frame disposed opposite to each other; each folded side frame includes: a first sub-side frame and a second sub-side frame, and a rotation mechanism located between the first sub-side frame and the second sub-side frame; the end of the first sub-side frame facing away from the second sub-side frame is connected to the end of the first support side frame, and the end of the second sub-side frame facing away from the first sub-side frame is connected to the end of the second support side frame; the rotation mechanism is used to drive the first sub-side frame to fold or unfold relative to the second sub-side frame about an axis parallel to the load-bearing surface;

[0009] The sliding part is located between the two folded edges and is slidably connected to the two folded edges;

[0010] The flexible optical screen is attached to the bearing surface. The flexible optical screen has two first side edges and two second side edges that are arranged opposite to each other. The two first side edges are slidably connected to the two folded frame edges respectively. One of the two second side edges is connected to the first support frame edge, and the other of the two second side edges is connected to the sliding part.

[0011] The sliding part is configured to: move relative to the two folded frame edges to unfold or retract the flexible optical screen; when the flexible optical screen is in the unfolded state, the sliding part is connected to the second support frame edge; when the flexible optical screen is in the retracted state, both the flexible optical screen and the sliding part are located between the two first sub-frame edges.

[0012] Optionally, the flexible optical screen includes: a flexible screen, an optical film, and multiple support strips;

[0013] The flexible screen has the two first side edges and the two second side edges; the optical film is connected to the side of the flexible screen opposite to the bearing surface; the plurality of support strips are connected to the side of the flexible screen opposite to the optical film, and the plurality of support strips are spaced apart in the extension direction of the folded frame;

[0014] When the flexible optical screen is in a retracted state, the portion of the optical film distributed between two adjacent support strips can be bent.

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

[0016] Alternatively, the flexible curtain may have a second perforated area distributed between two adjacent support strips.

[0017] Optionally, the sliding part includes: a sliding frame and a first support rod mounted on the sliding frame; the sliding frame is located between the two folded frame edges and is slidably connected to the two folded frame edges; the first support rod is connected to the second side edge of the flexible optical screen that is opposite to the first support frame edge.

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

[0019] Optionally, the sliding part further includes: a plurality of elastic elements, the plurality of elastic elements being arranged sequentially along the extension direction of the first support rod, one end of each elastic element being connected to the sliding frame, and the other end of each elastic element being connected to the first support rod.

[0020] Optionally, the frame further includes: at least two connectors;

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

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

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

[0024] The first side edge of the flexible optical screen is slidably connected to the second support rod and also to the third support rod; the second side edge of the two second side edges of the flexible optical screen that is away from the sliding part 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 includes: 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] 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 this application include at least the following:

[0029] The projection screen's frame and flexible optical screen are designed as a single integrated structure. The frame consists of two sets of opposing folding frames and two sets of opposing first and second support frames. The first and second sub-frames within each folding frame are connected by a rotating mechanism. When assembling the projection screen, the user can rotate the first sub-frame relative to the second sub-frame using the rotating mechanism, thus unfolding the entire frame. Then, simply pulling the sliding part to extend the flexible optical screen completes the installation. This reduces the difficulty of assembling the projection screen, effectively simplifying the assembly process and ensuring high assembly efficiency. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of a projection screen provided in an embodiment of this application;

[0032] Figure 2 This is an illustration of the effect of shrinking a flexible optical screen in a projection screen, as provided in an embodiment of this application.

[0033] Figure 3 This is a schematic diagram of the structure of a flexible optical screen provided in this application;

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

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

[0036] Figure 6 This is a cross-sectional view of a projection screen in a retracted state, provided in an embodiment of this application;

[0037] Figure 7 This is a cross-sectional view of a projection screen in an unfolded state, as provided in an embodiment of this application;

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

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

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

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

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

[0043] Figure 13 This is a schematic diagram of the structure of a laser projection system provided in an embodiment of this application. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[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 this application. Figure 2 This is an illustration of the effect of a flexible optical screen in a projection screen after it has been shrunk, according to an embodiment of this application. Figure 3 This is a schematic diagram of the structure of a flexible optical screen provided in this application. The projection screen 000 may include: a frame 100, a flexible optical screen 200, and a sliding part 300.

[0046] The frame 100 in the projection screen 000 has a support surface. When the frame 100 is flattened, the support surface of the frame 100 can be the side used to support the flexible optical screen 200 in the projection screen 000. Figure 1 The diagram shows a rear view of the projection screen 000, with frame 100 having a side K opposite to the support surface. Frame 100 in the projection screen 000 may include two opposing folding frames A and a first support frame B and a second support frame C. 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 support 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 support frame C. The rotation mechanism A3 can be used to fold or unfold the first sub-frame A1 relative to the second sub-frame A2 about an axis L1 parallel to the support surface.

[0047] The sliding part 300 in the projection screen 000 can be located between the two folded frame A and slidably connected to the two folded frame A.

[0048] The flexible optical screen 200 in the projection screen 000 can be attached to the support surface. The flexible optical screen 200 can have two first side edges E1 and two second side edges E2 that are arranged opposite to each other. The two first side edges E1 are slidably connected to two folded frame A respectively. One of the two second side edges E2 is connected to the first support frame B. The other of the two second side edges E2 is connected to the sliding part 300.

[0049] In this application, the sliding part 300 in the projection screen 000 can be configured to move relative to the two folded frame edges A to unfold or retract the flexible optical screen 200. Specifically, when the flexible optical screen 200 is in the unfolded state, the sliding part 300 is connected to the second support frame edge C; when the flexible optical screen 200 is in the retracted state, both the flexible optical screen 200 and the sliding part 300 are located between the two first sub-frame edges A1.

[0050] In this embodiment, the frame 100 and flexible optical screen 200 of the projection screen 000 are designed as an integral structure. The frame 100 consists of two sets of opposing folding frame edges A and two sets of opposing first support frame edges B and second support frame edges C. The first sub-frame edge A1 and the second sub-frame edge A2 in each folding frame edge A can be connected by a rotation mechanism A3. When the projection screen 000 needs to be assembled, the user can rotate the first sub-frame edge A1 of each folding frame edge A relative to the second sub-frame edge A2 using the rotation mechanism A3, thereby unfolding the entire frame 100. Subsequently, simply pulling the sliding part 300 to extend the flexible optical screen 200 completes the installation of the projection screen 000. In this way, the assembly difficulty of the projection screen 000 can be reduced, the assembly process of the projection screen 000 can be effectively simplified, and thus the assembly efficiency of the projection screen 000 can be guaranteed to be high.

[0051] In summary, this application provides a projection screen, including a frame, a flexible optical screen, and a sliding part. The frame and flexible optical screen of the projection screen are designed as a single integrated structure. The frame consists of two sets of opposing folded frame borders and two sets of opposing first and second support frame borders. The first and second sub-frame borders in each folded frame border are connected by a rotating mechanism. When assembling the projection screen, the user can rotate the first sub-frame border of each folded frame relative to the second sub-frame border using the rotating mechanism, thereby unfolding the entire frame. Subsequently, simply pulling the sliding part to extend the flexible optical screen completes the installation of the projection screen. This reduces the assembly difficulty of the projection screen, effectively simplifies the assembly process, and ensures high assembly efficiency.

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

[0053] Optionally, each of the first sub-frames A1 and A2 in each folded frame A has a notch P at its first end, with the two notches P being a first notch P1 and a second notch P2, respectively. When the first sub-frames A1 and A2 are unfolded, the first notch P1 and the second notch P2 can be used to form a clearance groove (not shown), within which at least a portion of the adapter A31 can be located. Thus, when the frame 100 is unfolded, a portion of the structure in the adapter A31 can be hidden within the clearance groove, thereby improving the compactness of the projection screen 000 structure.

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

[0055] In the embodiments of this application, please refer to Figure 5 and Figure 6 , Figure 5 yes Figure 3 An exploded view of the flexible optical screen is shown. Figure 6 This is a cross-sectional view of a projection screen in a retracted state, as provided in an embodiment of this application. The flexible optical screen 200 in the projection screen 000 may include: a flexible screen 201, an optical film 202, and multiple support strips 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 opposite to the supporting surface. A plurality of support strips 203 in the flexible optical screen 200 may be connected to the side of the flexible screen 201 opposite to the optical film 202, and the plurality of support strips 203 are spaced apart in the extension direction of the folded frame A.

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

[0058] In this configuration, because the optical film 202 typically possesses unique optical properties, connecting it to the side of the flexible screen 201 facing away from the supporting surface results in better image quality and an enhanced viewing experience. Furthermore, the multiple support strips 203 positioned on the side of the flexible screen 201 facing away from the optical film 202 provide necessary rigid support for the flexible optical screen 200, preventing unnecessary deformation due to external forces.

[0059] Optionally, the flexible screen 201 in the flexible optical screen 200 can have various structures. For clarity, this application embodiment will illustrate the following two optional implementation methods as examples:

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

[0061] For the second optional implementation method, please refer to... Figure 8 , Figure 8 This is a cross-sectional view of another projection screen provided in this application embodiment in its unfolded state. The flexible screen 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 the first hollow area U1 or the second hollow area U2 is set on the flexible screen 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 be bent more smoothly and avoid wrinkles or unevenness caused by material accumulation.

[0063] In the embodiments of this application, such as 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 mounted on the sliding frame 301; the sliding frame 301 is located between two folded frame A and is slidably connected to the two folded frame 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 is opposite to the first support frame B.

[0064] In this configuration, the relative sliding between the sliding frame 301 and the two folding frame A causes the first support rod 302 to move. Since 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 is opposite to the first support frame B, the movement of the sliding frame 301 will cause the flexible optical screen 200 to move accordingly, thereby enabling the flexible optical screen 200 to unfold and retract.

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

[0066] In this case, by sliding the sliding frame 301 within the slide groove P, not only can the sliding frame 301 be provided with a reliable guiding function, but the sliding frame 301 can also be ensured to move smoothly during the sliding process, reducing frictional resistance and thus improving the smoothness of the operation of the projection screen 000.

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

[0068] Optional, please refer to Figure 10 , Figure 10 This is a partial cross-sectional view of another projection screen provided in an embodiment of this application. The frame 100 in the projection screen 000 may further include at least two connectors 101. For example, the connector 101 may be an adjusting screw.

[0069] In this case, after 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 connector 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. Furthermore, by continuously rotating the connector 101, the connection between the sliding frame 301 and the second support frame C can be made more secure, preventing loosening. In addition, the distance between the second support frame C and the sliding frame 301 can be adjusted by adjusting the screwing depth. A deeper screwing depth results in a smaller distance between the second support frame C and the sliding frame 301, thereby allowing a greater tension force to be applied to the flexible optical screen 200, ensuring a higher flatness of the flexible optical screen 200.

[0071] In the embodiments of this application, please refer to Figure 11 , Figure 11 This is an exploded view of a frame provided in an embodiment of this application. The first sub-frame A1 in the folded frame A may have a first receiving cavity Q1, the second sub-frame A2 may have a second receiving cavity Q2, and the first supporting frame B may have a third receiving 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 receiving cavity Q1, a third support rod 103 suspended and fixed in the second receiving cavity Q2, and a fourth support rod 104 suspended and fixed in the third receiving cavity Q3.

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

[0074] In this embodiment, since the first sub-border A1, the second sub-border A2, and the first supporting border B in the frame 100 have the same shape, the first supporting border B in the frame 100 is taken as an example. Please refer to... Figure 12 , Figure 12This is a partial cross-sectional view of another projection screen provided in this application embodiment. The frame 100 in the projection screen 000 may include an inner frame 110 and an outer frame 120 fixedly connected. A third receiving cavity Q3 and an entry channel Z communicating with the third receiving 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 is opposite to the second support frame C, can enter into the third receiving cavity Q3 through the entry channel Z and connect with the fourth support rod 104 in the third receiving cavity Q3.

[0075] It should be noted that, as 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 are opposite to the first supporting frame B includes a separately configured inner frame and an outer frame. 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 connectors 101. The inner frame and 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 technologies, the projection screen frame typically employs a rectangular structure containing four support rods, each corresponding to one of the four edges of the frame. Each support rod is located at its corresponding edge position and is connected to the flexible screen via multiple springs. These springs apply a uniform tension force to the support rods, thereby ensuring the flexible screen is taut and remains flat.

[0077] In this application, the inner frame 110 and the outer frame 120 are designed as a single unit, and a third receiving cavity Q3 is formed between the inner frame 110 and the outer frame 120 to accommodate the fourth support rod 104. Thus, by fixing 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 assembly difficulty of the projection screen 000, effectively simplifying the assembly process and ensuring high assembly efficiency.

[0078] In this embodiment, the first side edge E1 has multiple first accommodating pockets, each of which can be fitted onto the second support rod 102 and the third support rod 103, and the multiple accommodating pockets are separately disposed on the second support rod 102 and the third support rod 103. For example, the multiple accommodating pockets and the support rod 203 correspond one-to-one, thus avoiding interference between adjacent accommodating pockets during the extension and retraction of the flexible optical screen 200. The second side edge E2 has second accommodating pockets, and one second accommodating pocket on the second side edge E2 can be fitted onto the fourth support rod 104, while another second accommodating pocket on the second side edge E2 can be fitted onto the first support rod 302. Multiple accommodating pockets are fitted onto the first support rod 302, allowing the elastic element 303 to be hooked onto the first support rod 302 between two adjacent accommodating pockets.

[0079] Since the second support rod 102 is suspended and fixed in the first receiving cavity Q1, the third support rod 103 is suspended and fixed in the second receiving cavity Q2, and the fourth support rod 104 is suspended and fixed in the third receiving cavity Q3, it can be ensured that the receiving 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 receiving cavity.

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

[0081] In this case, since the center 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 it is unfolded or retracted, reducing the phenomenon of jamming or unevenness during the sliding process and improving the smoothness of operation.

[0082] In the embodiments of this application, such as 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, there are two of each of the first corner fixing block 105 and the second corner fixing block 106.

[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 configuration, the first corner fixing block 105 and the second corner fixing block 106 provide suspension points for the second support rod 102, the third support rod 103, and the fourth support rod 104, allowing these support rods to suspend within the cavity without contacting the inner wall of the frame 100. This reduces friction between the support rods and the inner wall of the frame 100, resulting in smoother movement of the flexible optical screen 200 during expansion and contraction.

[0085] In summary, this application provides a projection screen, including a frame, a flexible optical screen, and a sliding part. The frame and flexible optical screen of the projection screen are designed as a single integrated structure. The frame consists of two sets of opposing folded frame borders and two sets of opposing first and second support frame borders. The first and second sub-frame borders in each folded frame border are connected by a rotating mechanism. When assembling the projection screen, the user can rotate the first sub-frame border of each folded frame relative to the second sub-frame border using the rotating mechanism, thereby unfolding the entire frame. Subsequently, simply pulling the sliding part to extend the flexible optical screen completes the installation of the projection screen. This reduces the assembly difficulty of the projection screen, effectively simplifies the assembly process, and ensures high assembly efficiency.

[0086] This application also provides a laser projection system, which can be an ultra-short-throw laser projection system. For example, such as... Figure 13 As shown, Figure 13 This is a schematic diagram of a laser projection system provided in an embodiment of this application. The laser projection system may include a projection screen 000 and a laser projection device 010. The projection screen 000 may be the projection screen described in the above embodiment. The laser projection device 010 may be electrically connected to an exciter (not shown) in the projection screen 000.

[0087] Thus, when the laser projection device 010 is working, it can not only emit light rays obliquely upwards, allowing it to project images onto the projection screen 000, but it can also send sound electrical signals to the exciter in the projection screen 000, enabling the projection screen 000 to emit 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 construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0089] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A projection screen, characterized in that, include: Frame, flexible optical screen and sliding part; The frame has a load-bearing surface and includes: two folded side frames disposed opposite to each other and a first support side frame and a second support side frame disposed opposite to each other; each folded side frame includes: a first sub-side frame and a second sub-side frame, and a rotation mechanism located between the first sub-side frame and the second sub-side frame; the end of the first sub-side frame facing away from the second sub-side frame is connected to the end of the first support side frame, and the end of the second sub-side frame facing away from the first sub-side frame is connected to the end of the second support side frame; the rotation mechanism is used to drive the first sub-side frame to fold or unfold relative to the second sub-side frame about an axis parallel to the load-bearing surface; The sliding part is located between the two folded edges and is slidably connected to the two folded edges; The flexible optical screen is attached to the bearing surface. The flexible optical screen has two first side edges and two second side edges that are arranged opposite to each other. The two first side edges are slidably connected to the two folded frame edges respectively. One of the two second side edges is connected to the first support frame edge, and the other of the two second side edges is connected to the sliding part. The sliding part is configured to: move relative to the two folded frame edges to unfold or retract the flexible optical screen; when the flexible optical screen is in the unfolded state, the sliding part is connected to the second support frame edge; when the flexible optical screen is in the retracted state, both the flexible optical screen and the sliding part are located between the two first sub-frame edges.

2. The projection screen according to claim 1, characterized in that, The flexible optical screen includes: a flexible screen, an optical film, and multiple support strips; The flexible screen has the two first side edges and the two second side edges; the optical film is connected to the side of the flexible screen opposite to the bearing surface; the plurality of support strips are connected to the side of the flexible screen opposite to the optical film, and the plurality of support strips are spaced apart in the extension direction of the folded frame; When the flexible optical screen is in a retracted state, the portion of the optical film distributed between two adjacent support strips 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 region, and the two ends of each support strip are respectively connected to the flexible screen near the two first side edges, and the part of each support strip located in the first hollow area is in contact with the optical film. Alternatively, the flexible curtain may have a second perforated area distributed between two adjacent support strips.

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 mounted on the sliding frame; the sliding frame is located between the two folded frames and is slidably connected to the two folded frames; the first support rod is connected to the second side edge of the flexible optical screen that is opposite to the first support frame.

5. The projection screen according to claim 4, characterized in that, The folded frame has a groove on the side facing the sliding frame, and the portion of the sliding frame facing the folded frame is located within the groove and is slidably connected to the groove.

6. The projection screen according to claim 4, characterized in that, The sliding part further includes: a plurality of elastic elements, which are arranged sequentially along the extension direction of the first support rod, with one end of each elastic element connected to the sliding frame and the other end of each elastic element connected to the first support rod.

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

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

Images