Projection screen and projection system

Abstract

The present application discloses a projection screen and a projection system, relating to the technical field of projection display. The projection screen includes: a support assembly, a rigid screen panel, a flexible connection cloth, and a plurality of elastic connection members. The support assembly includes: a rectangular frame and at least one first support rod with adjustable length fixedly connected to the rectangular frame. When the connection cloth is adhered to the screen panel and the connection cloth is connected to the rectangular frame through a plurality of elastic connection members, the positional relationship between the corner of the rectangular frame and the connection cloth can be adjusted by adjusting the length of the first support rod connected to the rectangular frame, so that the rectangular frame can effectively support the screen panel, and the screen panel can maintain a flat state, thereby ensuring the display effect of the projection screen.

Description

Technical Field

[0001] This application relates to the field of projection display technology, and particularly relates to a projection screen and a projection system. Background Art

[0002] Projection screens usually include soft screens or hard screens. Hard screens are widely used in the field of projection display technology because of their good optical gain uniformity, color reducibility, flatness, and good display effect.

[0003] In related technologies, an adhesive is usually used to bond a hard screen to a connecting cloth, and the connecting cloth can be connected to a rectangular frame. The rectangular frame can support the hard screen through the connecting cloth to prevent the hard screen from deforming.

[0004] However, when the rectangular frame supports the hard screen through the connecting cloth, since the connecting cloth bonded to the hard screen is a soft structure, the corners of the hard screen are prone to deformation, resulting in image distortion in the images displayed at the corners of the hard screen, affecting the display effect of the finally formed projection screen. Summary of the Invention

[0005] This application provides a projection screen and a projection system, which can solve the problems that the transportation of the hard screen is difficult and it is easy to cause damage during bonding in related technologies. The technical solutions are as follows:

[0006] On the one hand, a projection screen is provided. The projection screen includes: a support assembly, a rigid screen board, a soft connecting cloth, and a plurality of elastic connectors;

[0007] The non-light-receiving area of the screen board is bonded to the connecting cloth;

[0008] The support assembly includes: a rectangular frame composed of bar structures and a first support rod group. The first support rod group includes at least one first support rod with adjustable length. One end of the first support rod is fixedly connected to the corner of the rectangular frame, and the other end of the first support rod is fixedly connected to the other corner of the rectangular frame, or the other end of the first support rod is fixedly connected to the frame edge of the rectangular frame. The rectangular frame and the connecting cloth are connected through the plurality of elastic connectors, and the rectangular frame is used to support the connecting cloth.

[0009] Optionally, one end of the first support rod is fixedly connected to the first corner of the rectangular frame, and the other end of the first support rod is fixedly connected to the second corner of the rectangular frame, and the first corner and the second corner are opposite corners of the rectangular frame.

[0010] Optionally, the support assembly further includes: an adapter;

[0011] The middle part of each first support rod is connected to the adapter.

[0012] Optionally, each of the first support rods includes: a first sub-support rod and a second sub-support rod that are coaxial;

[0013] One end of the first sub-support rod is fixedly connected to the first corner of the rectangular frame, and the other end of the first sub-support rod is fixedly connected to the adapter;

[0014] One end of the second sub-support rod is fixedly connected to the adapter, and the other end of the second sub-support rod is fixedly connected to the second corner of the rectangular frame.

[0015] Optionally, both the first sub-support rod and the second sub-support rod are telescopic support rods.

[0016] Optionally, any one of the first sub-support rod and the first sub-support rod includes: a first sub-rod body, a second sub-rod body, and a third sub-rod body;

[0017] One end of the first sub-rod body is fixedly connected to the first corner of the rectangular frame, the other end of the first sub-rod body is threadedly connected to one end of the second sub-rod body, the other end of the second sub-rod body is threadedly connected to one end of the third sub-rod body, and the other end of the third sub-rod body is fixedly connected to the adapter.

[0018] Optionally, the support assembly further includes: a second support rod group, and the second support rod group includes at least one second support rod;

[0019] One end of each second support rod is fixedly connected to the first frame side of the rectangular frame, and the other end of each second support rod is fixedly connected to the second frame side of the rectangular frame, and the first frame side and the second frame side are opposite sides of the rectangular frame.

[0020] Optionally, the second support rod includes: a third sub-support rod and a fourth sub-support rod;

[0021] One end of the third sub-support rod is fixedly connected to the first frame side of the rectangular frame, and the other end of the third sub-support rod is fixedly connected to the adapter;

[0022] One end of the fourth sub-support rod is fixedly connected to the adapter, and the other end of the fourth sub-support rod is fixedly connected to the second frame side of the rectangular frame.

[0023] Optionally, the cross-section of the third sub-support rod and the cross-section of the fourth sub-support rod are both T-shaped, and the cross-section of the third sub-support rod and the cross-section of the fourth sub-support rod are both perpendicular to the extending direction of the second support rod.

[0024] On the other hand, a projection system is provided, which includes: an ultra-short throw laser projection device and the projection screen described in the above aspects.

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

[0026] This application provides a projection screen and a projection system. The projection screen may include: a support assembly, a rigid screen board, a flexible connection cloth, and a plurality of elastic connectors. The support assembly includes: a rectangular frame composed of strip structures and at least one first support rod with adjustable length fixedly connected to the rectangular frame. When the connection cloth is bonded to the screen board and the connection cloth is connected to the rectangular frame through a plurality of elastic connectors, the positional relationship between the corner of the rectangular frame and the connection cloth can be adjusted by adjusting the length of the first support rod connected to the rectangular frame, so that the rectangular frame can effectively support the screen board, and the screen board can maintain a flat state, thereby ensuring the display effect of the projection screen. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 It is a schematic structural diagram of a projection screen provided by an embodiment of the present invention;

[0029] Figure 2 It is a schematic structural diagram of another projection screen provided by an embodiment of the present invention;

[0030] Figure 3 It is a schematic partial structural diagram of a projection screen provided by an embodiment of the present invention;

[0031] Figure 4 It is a schematic structural diagram of a support assembly provided by an embodiment of the present invention;

[0032] Figure 5 It is a schematic structural diagram of a first sub-support rod provided by an embodiment of the present invention;

[0033] Figure 6 It is a schematic structural diagram of another support assembly provided by an embodiment of the present invention;

[0034] Figure 7 It is a schematic structural diagram of a third sub-support rod provided by an embodiment of the present invention;

[0035] Figure 8It is a schematic diagram of a partial structure of a rectangular frame provided by an embodiment of the present invention;

[0036] Figure 9 It is a schematic diagram of the structure of a rectangular frame provided by an embodiment of the present invention. Detailed implementation manners

[0037] To make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0038] Figure 1 It is a schematic diagram of the structure of a projection screen provided by an embodiment of the present invention. Figure 2 It is a schematic diagram of the structure of another projection screen provided by an embodiment of the present invention. Combining Figure 1 and Figure 2 it can be seen that the projection screen 00 may include: a support assembly 01, a rigid screen board 02, a flexible connection cloth 03, and a plurality of elastic connectors 04.

[0039] The non-light-receiving area of the screen board 02 may be bonded to the connection cloth 03. The non-light-receiving area of the screen board 02 may include: the non-projection light-receiving surface of the screen board 02, and the edge area of the projection light-receiving surface of the screen board 02, and this edge area surrounds the light-receiving area of the screen board 02. Among them, the connection cloth 03 may be located on the non-projection light-receiving surface of the screen board 02 to be bonded to the non-projection light-receiving surface of the screen board 02. In addition, the connection cloth 03 may also wrap around from the edge of the screen board 02 to the projection light-receiving surface of the screen board 02 and then be bonded to the edge area of the projection light-receiving surface of the screen board 02.

[0040] Referring to Figure 1 , the support assembly 01 may include: a rectangular frame 011 composed of a bar-shaped structure and a first support rod group 012. The first support rod group 012 includes at least one first support rod 0121 with adjustable length. One end of the first support rod 0121 may be fixedly connected to the corner of the rectangular frame 011, and the other end of the first support rod 0121 may be fixedly connected to the other corner of the rectangular frame 011. Or, the other end of the first support rod 0121 may be fixedly connected to the frame edge of the rectangular frame 011. The rectangular frame 011 may be connected to the connection cloth 03 through a plurality of elastic connectors 04, and the rectangular frame 011 may be used to support the connection cloth 03.

[0041] That is to say, the rectangular frame 011 may be connected to the screen board 02 through the connection cloth 03, and the rectangular frame 011 may support the screen board 02 by supporting the connection cloth 03.

[0042] In the embodiment of the present invention, by fixedly connecting the first support rod 0121 with the rectangular frame 011, the rigidity of the support assembly 01 can be improved, and the reliability of the support assembly 01 supporting the screen panel 02 can be ensured. In addition, the support assembly 01 has a support surface, which can be parallel to the plate surface of the screen panel 02, ensuring that the support assembly 01 can effectively support the screen panel 02. The support surface can be a hollow surface formed by the rectangular frame 011 and the first support rod group 012.

[0043] refer to Figure 2 It can be seen that the multiple elastic connecting members 04 can be evenly arranged on one side of the screen panel 02 . Figure 3 Schematic diagram of a partial structure of a projection screen provided by an embodiment of the present invention. Figure 3 After the connecting cloth 03 is bonded to the non-projection light-receiving surface of the screen panel 02 , it can protrude from the edge of the screen panel 02 . The portion of the connecting cloth 03 protruding from the edge of the screen panel 02 can bypass the rectangular frame 011 and bend toward a side away from the screen panel 02 .

[0044] Alternatively, after the connecting cloth 03 is bonded to the non-projection light-receiving surface of the screen panel 02, the portion of the connecting cloth 03 protruding from the edge of the screen panel 02 can be wrapped around to the projection light-receiving surface of the screen panel 02, and after being bonded to the edge area of ​​the projection light-receiving surface of the screen panel 02, it can then wrap around the rectangular frame 011 and bend toward the side away from the screen panel 02.

[0045] refer to Figure 3 The bent portion of the connecting cloth 03 may be provided with an opening, and the elastic connecting member 04 may pass through the opening to connect with the connecting cloth 03. In addition, a connecting portion 011a may be provided on the rectangular frame 011, and the elastic connecting member 04 may be connected with the rectangular frame 011 through the connecting portion 011a. That is, one end of the elastic connecting member 04 may be connected with the opening on the connecting cloth 03, and the other end may be connected with the connecting portion 011a of the rectangular frame 011.

[0046] Since the elastic connector 04 is elastic, when one end of the elastic connector 04 is connected to the connecting cloth 03 and the other end is connected to the rectangular frame 011, the connecting cloth 03 can be stretched open by its own elasticity, so that the connecting cloth 03 is opened to a stretched state. Optionally, the elastic connector 04 can be a spring.

[0047] Optionally, the elastic force direction of the elastic connecting member 04 can be the pulling force direction. That is, when the elastic connecting member 04 is connected to the connecting cloth 03 and the rectangular frame 011, the elastic connecting member 04 can stretch the connecting cloth 03 towards the connecting portion 011a of the rectangular frame 011 until the connecting cloth 03 is opened to the stretched state. At this time, since the connecting cloth 03 and the screen panel 02 are adhesively bonded to each other, when the connecting cloth 03 is opened to the stretched state, a force in the same direction is also applied to the screen panel 02, thereby ensuring that the screen panel 02 maintains good flatness and ensuring the display effect of the projection screen 00.

[0048] In the embodiment of the present invention, since the connecting cloth 03 adhesively bonded to the screen panel 02 has a soft structure, it will not cause damage to the screen panel 02 during adhesion. However, the corners of the screen panel 02 are prone to deformation, resulting in image distortion of the image displayed at the corners of the screen panel 02. Therefore, one end of the first support rod 0121 with adjustable length is fixedly connected to the corner of the rectangular frame 011, and the other end is fixedly connected to another corner or the frame edge of the rectangular frame 011, which can facilitate adjusting the positional relationship between the corner of the rectangular frame 011 connected to the first support rod 0121 and the connecting cloth 03, and ensuring that the rectangular frame 011 can effectively support the screen panel 02.

[0049] Exemplarily, when one end of the first support rod 0121 is fixedly connected to the corner of the rectangular frame 011 and the other end is fixedly connected to another corner of the rectangular frame 011, the positional relationship between the two corners respectively connected to one end and the other end of the first support rod 0121 and the connecting cloth 03 can be adjusted by adjusting the length of the first support rod 0121. When one end of the first support rod 0121 is fixedly connected to the corner of the rectangular frame 011 and the other end is fixedly connected to the frame edge of the rectangular frame 011, the positional relationship between the corner of the rectangular frame 011 connected to one end of the first support rod 0121 and the connecting cloth 03 can be adjusted by adjusting the length of the first support rod 0121.

[0050] Since the rectangular frame 011 is made of a hard material and is not easily deformed, the distance between any two corners in the rectangular frame 011 is a fixed distance. When the first support rod 0121 elongates, the end of the first support rod 0121 connected to the rectangular frame 011 receives a first force from the rectangular frame 011, causing the middle part of the first support rod 0121 to bulge towards the side away from the screen panel 02. Correspondingly, the corner of the rectangular frame 011 connected to the first support rod 0121 receives a second force from the first support rod 0121, causing the corner of the rectangular frame 011 to move towards the side close to the connecting cloth 03. Among them, the first force and the second force are reaction forces to each other. For example, refer to Figure 1, it can cause the corner of the rectangular frame 011 to move along the A direction, avoiding the generation of a gap between the corner of the rectangular frame 011 and the connecting cloth 03, and reducing the influence of the rectangular frame 011 on the supporting effect of the screen panel 02. When the first support rod 0121 shortens, the end of the first support rod 0121 connected to the rectangular frame 011 receives a third force from the rectangular frame 011, causing the middle part of the first support rod 0121 to bulge towards the side close to the screen panel 02. Correspondingly, the corner of the rectangular frame 011 connected to the first support rod 0121 receives a fourth force from the first support rod 0121, enabling the corner of the rectangular frame 011 to move towards the side away from the connecting cloth 03. Among them, the third force and the fourth force are reaction forces to each other. For example, refer to Figure 1 , it can cause the corner of the rectangular frame 011 to move along the B direction, avoiding the screen panel 02 being damaged due to the large force exerted by the corner of the rectangular frame 011 on the screen panel 02.

[0051] In the embodiment of the present invention, when the screen panel 02 is bonded to the connecting cloth 03, the operator can flatten the connecting cloth 03 and then bond one side of the screen panel 02 to one side of the connecting cloth 03. After the screen panel 02 is bonded to the connecting cloth 03 and the connecting cloth 03 is connected to the rectangular frame 011 through a plurality of elastic connectors 04, the length of the first support rod 0121 connected to the corner of the rectangular frame 011 can be adjusted to keep the screen panel 02 in a flat state, ensuring the display effect of the projection screen.

[0052] In summary, the embodiment of the present invention provides a projection screen, which may include: a support assembly, a rigid screen panel, a flexible connecting cloth, and a plurality of elastic connectors. The support assembly includes: a rectangular frame composed of a bar-shaped structure and at least one length-adjustable first support rod fixedly connected to the rectangular frame. When the connecting cloth is bonded to the screen panel and the connecting cloth is connected to the rectangular frame through a plurality of elastic connectors, the position relationship between the corner of the rectangular frame and the connecting cloth can be adjusted by adjusting the length of the first support rod connected to the rectangular frame, so that the rectangular frame can effectively support the screen panel, and the screen panel can be kept in a flat state, thus ensuring the display effect of the projection screen.

[0053] Optionally, the diameter of the first support rod 0121 can be 8 mm (millimeters) to 12 mm. The length adjustment range of the first support rod 0121 can be 0 mm to 30 mm.

[0054] In an embodiment of the present invention, the connection cloth 03 and the screen plate 02 can be bonded through an adhesive. Among them, the coefficient of thermal expansion of the adhesive can be the same as or close to that of the screen plate 02. When the screen plate 02 expands and contracts due to temperature changes, the adhesive will play a certain buffering role, reducing the impact on the projection image caused by the deformation of the screen plate 02 due to thermal expansion and contraction, and ensuring the flatness of the screen plate 02.

[0055] Exemplarily, the adhesive can be polyurethane (PU), and the PU can be sprayed on one side of the connection cloth 03.

[0056] Optionally, the connection cloth 03 can be made of flexible cloth, or the connection cloth 03 can be made of multiple layers of flexible film materials. The embodiment of the present invention does not limit the material of the connection cloth 03.

[0057] The color of the connection cloth 03 can be black, and the connection cloth 03 covers the area of the non-projection light-receiving surface of the screen plate 02 that is opposite to the light-receiving area in the projection light-receiving surface, which can play a role in shading and protecting the screen plate 02.

[0058] In an embodiment of the present invention, after the connection cloth 03 is bonded to the screen plate 02, the flatness of the screen plate 02 can be adjusted by directly manually adjusting the connection cloth, such as pulling the edges or corners of the connection cloth 03; when the connection cloth 03 is bonded to the screen plate 02 and the connection cloth 03 is connected to the rectangular frame 011 through multiple elastic connectors 04, the flatness of the screen plate 02 can also be adjusted by manually adjusting the structure of the projection screen 00 itself (such as the first support rod 0121 connected to the corner of the rectangular frame 011), thereby improving the automation degree and flexibility of the adjustment of the screen plate 02 and improving the adjustment efficiency.

[0059] Generally, the screen plate 02 is rectangular. Therefore, setting the frame in the support component 01 for supporting the screen plate 02 as a rectangular frame can adapt to the shape of the screen plate 02. And a first support rod group 012 that matches the shape of the rectangular frame 011 and has an adjustable shape can be set, and the flatness of the screen plate 02 can be adjusted through the rectangular frame 011 and the first support rod group 012.

[0060] Reference Figure 1 , one end of the first support rod 0121 can be fixedly connected to the first corner of the rectangular frame 011, and the other end of the first support rod 0121 can be fixedly connected to the second corner of the rectangular frame 011. The first corner and the second corner can be opposite corners of the rectangular frame 011. That is, the first corner and the second corner are not adjacent, and one end and the other end of the first support rod 0121 can be respectively connected to two non-adjacent corners of the rectangular frame 011.

[0061] By connecting one end and the other end of the first support rod 0121 to two non-adjacent corners of the rectangular frame 011 respectively, on the one hand, it is easy to adjust the positional relationship between the two corners of the rectangular frame 011 connected to the first support rod 0121 and the connecting cloth 03 to ensure the flatness of the screen panel 02. On the other hand, it can improve the stability and reliability of the support assembly 01 to ensure that the support assembly 01 can effectively support the screen panel 02.

[0062] For example, Figure 1 Two first support rods 0121 are shown in the figure, one end of one first support rod 0121 is fixedly connected to the first corner located at the upper left corner of the rectangular frame 011, and the other end is fixedly connected to the second corner located at the lower right corner of the rectangular frame 011. One end of the other first support rod 0121 is fixedly connected to the first corner located at the lower left corner of the rectangular frame 011, and the other end is fixedly connected to the second corner located at the upper right corner of the rectangular frame 011.

[0063] Of course, the two corners respectively connected to one end and the other end of the first support rod 0121 may also be two adjacent corners in the rectangular frame 011, and the embodiment of the present invention does not limit this.

[0064] refer to Figure 1 The rod diameter in the middle of the two first support rods 0121 can be smaller than the rod diameter at the end, that is, the first support rod 0121 is a rod-shaped structure with thick ends and thin middle, to ensure that the two first support rods 0121 do not touch each other at the intersection, that is, there is a gap between the two first support rods 0121 at the intersection, so as to avoid mutual influence between the two first support rods 0121 and the corner when they are connected. Of course, the two first support rods 0121 can also be an integrated structure, which is not limited in the embodiment of the present invention.

[0065] Example, reference Figure 1 The middle parts of the two first support rods 0121 can be flat, and one first support rod 0121 connecting the first corner of the upper left corner and the second corner of the lower right corner of the rectangular frame 011 is away from the screen panel 02 relative to the other first support rod 0121 connecting the first corner of the lower left corner and the second corner of the upper right corner of the rectangular frame 011.

[0066] Alternatively, refer to Figure 4 In order to prevent the first support rods 0121 from interfering with each other at the intersection, the support assembly 01 may further include an adapter 013. The middle portion of each first support rod 0121 may be connected to the adapter 013.

[0067] refer to Figure 4It can be seen that the first support rod 0121 may include a first sub-support rod 01211 and a second sub-support rod 01212. One end of the first sub-support rod 01211 may be fixedly connected to the first corner of the rectangular frame 011, and the other end of the first sub-support rod 01211 may be fixedly connected to the adapter 013. One end of the second sub-support rod 01212 may be fixedly connected to the adapter 013, and the other end of the second sub-support rod 01212 may be fixedly connected to the second corner of the rectangular frame 011. By providing the adapter 013 and dividing the first support rod 0121 into two parts, it is possible to avoid the mutual influence of multiple first support rods 0121 at the intersection when multiple first support rods 0121 are provided.

[0068] Optionally, both the first sub-support rod 01211 and the second sub-support rod 01212 may be fixedly connected to the adapter 013 and the rectangular frame 011 by screws.

[0069] In the embodiment of the present invention, since the image projected on the screen plate 02 is prone to distortion at the corners of the screen plate 02, the first sub-support rod 01211 connected to the first corner of the rectangular frame 011 and the second sub-support rod 01212 connected to the second corner of the rectangular frame 011 are both provided as telescopic support rods, so as to facilitate adjusting the positional relationship between the corners of the rectangular frame 011 connected to the first sub-support rod 01211 and the second sub-support rod 01212 and the connecting cloth 03, and ensuring that the support assembly 01 can effectively support the screen plate 02.

[0070] Since the first sub-support rod 01211 and the second sub-support rod 01212 are two independent parts, adjusting the length of one of the first sub-support rod 01211 and the second sub-support rod 01212 will not affect the length of the other sub-support rod. Therefore, by respectively adjusting the lengths of the individual sub-support rods, the positional relationship between each corner of the rectangular frame 011 and the connecting cloth 03 can be adjusted, ensuring that after each sub-support rod is adjusted, the rectangular frame 011 can apply an appropriate force to the screen plate 02 and ensuring the flatness of the screen plate 02.

[0071] For example, the first sub-support rod 01211 can be adjusted to increase the length of the first sub-support rod 01211, so that the first corner of the rectangular frame 011 connected to the first sub-support rod 01211 can move towards the side close to the connecting cloth 03; the second sub-support rod 01212 can be adjusted to shorten the length of the second sub-support rod 01212, so that the second corner of the rectangular frame connected to the second sub-support rod 01212 can move away from the side of the connecting cloth 03. Alternatively, the first sub-support rod 01211 can be adjusted to shorten the length of the first sub-support rod 01211, so that the first corner of the rectangular frame 011 connected to the first sub-support rod 01211 can move away from the side of the connecting cloth 03; the second sub-support rod 01212 can be adjusted to increase the length of the second sub-support rod 01212, so that the second corner of the rectangular frame 011 connected to the second sub-support rod 01212 can move towards the side close to the connecting cloth 03.

[0072] Reference Figure 4 , the adapter 013 can be disc-shaped, and the adapter 013 can also be called an adapter disc. Optionally, the thickness range of the adapter 013 can be 2 mm to 5 mm, and the diameter range of the adapter 013 can be 150 mm to 300 mm.

[0073] Optionally, the materials of the first support rod 0121 and the adapter 013 can include at least one of: aluminum (Al), cold-rolled steel (SPCC), cold-rolled galvanized steel (SGCC), and electrolytic lead dioxide galvanized steel (SECC).

[0074] In the embodiment of the present invention, any one of the first sub-support rod 01211 and the second sub-support rod 01212 can include: a first sub-rod body, a second sub-rod body, and a third sub-rod body. One end of the first sub-rod body can be fixedly connected to the first corner of the rectangular frame 011, the other end of the first sub-rod body can be threadedly connected to one end of the second sub-rod body, the other end of the second sub-rod body can be threadedly connected to one end of the third sub-rod body, and the other end of the third sub-rod body can be fixedly connected to the adapter 013.

[0075] Here, the first sub-support rod 01211 is taken as an example for illustration. Reference Figure 5 It can be seen that the first sub-support rod 01211 can include: a first sub-rod body 01211a, a second sub-rod body 01211b, and a third sub-rod body 01211c. Combining Figure 4 and Figure 5, one end of the first sub-rod 01211a can be fixedly connected to the first corner of the rectangular frame 011, the other end of the first sub-rod 01211a can be threadedly connected to one end of the second sub-rod 01211b, the other end of the second sub-rod 01211b can be threadedly connected to one end of the third sub-rod 01211c, and the other end of the third sub-rod 01211c can be fixedly connected to the adapter 013.

[0076] Since the second sub-rod 01211b is threadedly connected to both the first sub-rod 01211a and the third sub-rod 01211c, when it is necessary to adjust the length of the first sub-support rod 01211, the second sub-rod 01211b can be rotated so that the first sub-rod 01211a and the third sub-rod 01211c can move closer to or away from the second sub-rod 01211b. When both the first sub-rod 01211a and the third sub-rod 01211c move closer to the second sub-rod 01211b, the length of the first sub-support rod 01211 can be shortened. When both the first sub-rod 01211a and the third sub-rod 01211c move away from the second sub-rod 01211b, the length of the first sub-support rod 01211 can be elongated.

[0077] Optionally, referring to Figure 5 , external threads can be provided at both the other end of the first sub-rod 01211a and one end of the third sub-rod 01211c, and internal threads can be provided at both one end and the other end of the second sub-rod 01211b. The other end of the first sub-rod 01211a can be inserted into one end of the second sub-rod 01211b and threadedly connected to the second sub-rod 01211b. One end of the third sub-rod 01211c can be inserted into the other end of the second sub-rod 01211b and threadedly connected to the second sub-rod 01211b.

[0078] Alternatively, internal threads can be provided at both the other end of the first sub-rod 01211a and one end of the third sub-rod 01211c, and external threads can be provided at both one end and the other end of the second sub-rod 01211b. One end of the second sub-rod 01211b can be inserted into the other end of the first sub-rod 01211a and threadedly connected to the first sub-rod 01211a. The other end of the second sub-rod 01211b can be inserted into one end of the third sub-rod 01211c and threadedly connected to the third sub-rod 01211c.

[0079] In the embodiment of the present invention, the structure of the second sub-support rod 01212 can be the same as that of the first sub-support rod 01211, and details are not described herein again.

[0080] It should be noted that referring to Figure 1, when the first support rod 0121 is an integral structure, that is, when the first sub-support rod 01211 and the second sub-support rod 01212 are of an integral structure, the first support rod 0121 can also be a telescopic support rod. At this time, the first support rod 0121 may include: a first rod body 0121a, a second rod body 0121b, and a third rod body 0121c. One end of the first rod body 0121a is fixedly connected to the first corner of the rectangular frame 011, the other end of the first rod body 0121a is threadedly connected to one end of the second rod body 0121b, the other end of the second rod body 0121b is threadedly connected to one end of the third rod body 0121c, and the other end of the third rod body 0121c is fixedly connected to the second corner of the rectangular frame 011. Among them, the length of the first support rod 0121 can be adjusted by rotating the second rod body 0121b.

[0081] In the embodiment of the present invention, in order to ensure the effectiveness of adjusting the length of the first support rod 0121, refer to Figure 6 , the first support rod 0121 may include: a first rod body 0121a, a second rod body 0121b, a third rod body 0121c, a fourth rod body 0121d, and a fifth rod body 0121e. Among them, one end of the first rod body 0121a is fixedly connected to the first corner of the rectangular frame 011, the other end of the first rod body 0121a is threadedly connected to one end of the second rod body 0121b, the other end of the second rod body 0121b is threadedly connected to one end of the third rod body 0121c, the other end of the third rod body 0121c is threadedly connected to one end of the fourth rod body 0121d, the other end of the fourth rod body 0121d is threadedly connected to one end of the fifth rod body 0121e, and the other end of the fifth rod body 0121e is fixedly connected to the second corner of the rectangular frame 011. Among them, the length of the first support rod 0121 can be adjusted by rotating the second rod body 0121b, the third rod body 0121c, or the fourth rod body 0121d.

[0082] Of course, the first support rod 0121 may include more rod bodies. The embodiment of the present invention does not limit the number of rod bodies included in the first support rod 0121, as long as the length of the first support rod 0121 can be adjusted.

[0083] Refer to Figure 6It can be seen that the support assembly 01 may further include: a second support rod group 014, and the second support rod group 014 may include at least one second support rod 0141. One end of the second support rod 0141 may be fixedly connected to the first frame side of the rectangular frame 011, and the other end of the second support rod 0141 may be fixedly connected to the second frame side of the rectangular frame 011, and the first frame side and the second frame side may be opposite sides of the rectangular frame 011. That is, the first frame side and the second frame side are not adjacent, and one end and the other end of the second support rod 0141 may be respectively connected to two non-adjacent frame sides of the rectangular frame 011. By providing the second support rod group 014, the stability and reliability of the support assembly 01 can be ensured, thereby ensuring the effectiveness of the support assembly 01 in supporting the screen panel 02 and ensuring the flatness of the screen panel 02.

[0084] Exemplarily, Figure 6 Two second support rods 0141 are shown. One end of one second support rod 0141 is fixedly connected to the upper first frame side of the rectangular frame 011, and the other end is fixedly connected to the lower second frame side of the rectangular frame 011. One end of the other second support rod 0141 is fixedly connected to the left first frame side of the rectangular frame 011, and the other end is fixedly connected to the right second frame side of the rectangular frame 011.

[0085] In Figure 6 In the support assembly 01 shown, since the adapter 013 is not provided, in order to prevent the first support rod 0121 and the second support rod 0141 from affecting each other at the intersection, the second support rod 0141 may be closer to the screen panel 02 relative to the first support rod 0121. Exemplarily, referring to Figure 6 two second support rods 0141 may both be located on the side of the two first support rods 0121 closer to the screen panel 02, that is, the two second support rods 0141 may be located between the two first support rods 0121 and the screen panel 02, and the two second support rods 0141 may be an integral structure.

[0086] In Figure 4 In the support assembly 01 shown, since the adapter 013 is provided, the second support rod 0141 may include: a third sub-support rod 01411 and a fourth sub-support rod 01412. One end of the third sub-support rod 01411 may be fixedly connected to the first frame side of the rectangular frame 011, and the other end of the third sub-support rod 01411 may be fixedly connected to the adapter 013. One end of the fourth sub-support rod 01412 is fixedly connected to the adapter 013, and the other end of the fourth sub-support rod 01412 is fixedly connected to the second frame side of the rectangular frame 011.

[0087] Optionally, the third sub-support rod 01411 and the fourth sub-support rod 01412 can both be fixedly connected to the adapter 013 and the rectangular frame 011 by screws.

[0088] Figure 7 It is a schematic structural diagram of a third sub-support rod provided by an embodiment of the present invention. Among them, the structure of the fourth sub-support rod 01412 can be the same as that of the third sub-support rod 01411. Refer to Figure 7 , the cross-sections of the third sub-support rod 01411 and the fourth sub-support rod 01412 can both be T-shaped. The cross-section of the third sub-support rod 01411 can be perpendicular to the extending direction of the third sub-support rod 01411, and the cross-section of the fourth sub-support rod 01412 can be perpendicular to the extending direction of the fourth sub-support rod 01412. Among them, the extending directions of the third sub-support rod 01411 and the fourth sub-support rod 01412 are collinear, that is, both are the extending direction X of the second support rod 0141. That is to say, the cross-sections of the third sub-support rod 01411 and the fourth support rod 01222 can both be perpendicular to the extending direction X of the second support rod 0141.

[0089] By setting both the third sub-support rod 01411 and the fourth sub-support rod 01412 as T-shaped, the rigidity of the third support rod 01221 and the fourth support rod 01222 can be ensured, thereby ensuring the reliability of the support assembly 01 for supporting the screen panel 02.

[0090] Refer to Figure 7 , the third sub-support rod 01411 can include: a first plate body 01411a and a second plate body 01411b, and the first plate body 01411a is perpendicularly arranged with the second plate body 01411b, so that the cross-section of the third sub-support rod 01411 can be T-shaped.

[0091] It should be noted that when the second support rod 0141 is an integral structure, that is, when the third sub-support rod 01411 and the fourth sub-support rod 01412 are an integral structure, the cross-section of the second support rod 0141 can also be T-shaped, and the cross-section of the second support rod 0141 is perpendicular to the extending direction X of the second support rod 0141.

[0092] Figure 8 It is a schematic partial structure diagram of a rectangular frame provided by an embodiment of the present invention. Refer to Figure 8It can be seen that a pit 011b can be provided at the connection between the rectangular frame 011 and the second support rod 0141, and a through groove 011b1 that mates with the T-shape of the second support rod 0141 can be provided in the pit 011b. Among them, the first plate body 01411a can be located in the pit 011b, and the second plate body 01411b can be located in the through groove 011b1. On the one hand, it can facilitate the second support rod 0141 to have space to connect with the rectangular frame 011, and on the other hand, it can ensure the reliability of the connection between the second support rod 0141 and the rectangular frame 011.

[0093] Optionally, both the first support rod 0121 and the second support rod 0141 can be fixedly connected to the rectangular frame 011 by screws.

[0094] Reference Figure 9 , the rectangular frame 011 composed of a bar-shaped structure can include: a plurality of frame rods 0111 and a plurality of connectors 0112 having the same number as the plurality of frame rods 0111. The plurality of frame rods 0111 and the plurality of connectors 0112 are arranged at intervals and are connected to each other to enclose the rectangular frame 011.

[0095] Figure 9 Four frame rods 0111 and four connectors 0112 are shown in . The two ends of the frame rod 0111 can be respectively fixedly connected to a connector 0112. For example, the two ends of the frame rod 0111 can be respectively welded to a connector 0112. By providing four frame rods 0111 and four connectors 0112, the rectangular frame 011 can be formed.

[0096] Among them, the lengths of two of the four frame rods 0111 are the same, forming a set of opposite sides of the rectangular frame 011, and the lengths of the other two frame rods 0111 are the same, forming the other set of opposite sides of the rectangular frame 011.

[0097] Of course, the frame rod 0111 and the connector 0112 provided in the embodiment of the present invention can also be an integral structure, and the embodiment of the present invention does not limit this.

[0098] Reference Figure 9 It can also be seen that the cross-section of the frame rod 0111 is L-shaped, and the cross-section of the frame rod 0111 is perpendicular to the extension direction of the frame rod 0111. By setting the cross-section of the frame rod 0111 to be L-shaped, the rigidity of the frame rod 0111 can be ensured, thereby ensuring the reliability of the rectangular frame 011 to support the screen plate 02.

[0099] Optionally, the material of the rectangular frame 011 can include: one of SPCC, SGCC, and SECC. The thickness range of the rectangular frame 011 can be 1.5 mm to 3 mm.

[0100] It should be noted that before the projection screen 00 provided in the embodiment of the present invention leaves the factory, the projection device can project an image on the screen board 02 of the projection screen 00. The inspector can judge whether the corners of the screen board 02 are flat according to the clarity of the projected image. If it is judged that the corners of the screen board 02 are not flat, the inspector can adjust the length of the first support rod 0121 so that the corners of the rectangular frame 011 can move closer to or away from the connecting cloth 03, so that the rectangular frame 011 can effectively support the screen board 02 and ensure the flatness of the screen board 02. Of course, after the projection screen 00 leaves the factory, the user can also adjust the length of the first support rod 0121 to improve the display effect of the projection screen 00.

[0101] In summary, the embodiment of the present invention provides a projection screen, which may include: a support assembly, a rigid screen board, a soft connecting cloth, and a plurality of elastic connectors. The support assembly includes: a rectangular frame composed of a bar-shaped structure and at least one length-adjustable first support rod fixedly connected to the rectangular frame. When the connecting cloth is bonded to the screen board and the connecting cloth is connected to the rectangular frame through a plurality of elastic connectors, the position relationship between the corners of the rectangular frame and the connecting cloth can be adjusted by adjusting the length of the first support rod connected to the rectangular frame, so that the rectangular frame can effectively support the screen board, and the screen board can maintain a flat state, thereby ensuring the display effect of the projection screen.

[0102] After the screen board is bonded to the connecting cloth, if the flatness of the screen board is adjusted by directly manually adjusting the connecting cloth, multiple workers are required to cooperate to pull the edges or corners of the connecting cloth. If the flatness of the screen board is adjusted by manually adjusting the structure of the projection screen itself, only one worker needs to adjust the length of the telescopic support rod in the support rod group. This adjustment method does not require multiple workers to cooperate, saves human resources, and improves the adjustment efficiency.

[0103] The embodiment of the present invention further provides a projection system, which may include an ultra-short-throw laser projection device and the projection screen 00 described in the above embodiment. Among them, the ultra-short-throw laser projection device can be used to project a projection image onto the screen board 02 of the projection screen, and the screen board 02 can display the projection image for the user to view.

[0104] Optionally, the ultra-short-throw laser projection device can be an ultra-short-throw laser projector.

[0105] It should be noted that the structure of the projection screen 00 in the projection system provided in the embodiment of the present invention can be the same as the structure of the projection screen 00 provided in the above embodiment, and the embodiment of the present invention will not be described in detail here.

[0106] The foregoing are only alternative embodiments of the present application and are 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 within the protection scope of the present application.

Claims

1. A projection screen, characterized in that, The projection screen (00) includes: a support assembly (01), a rigid screen panel (02), a flexible connecting cloth (03), and a plurality of elastic connecting members; The non-light-receiving area of the screen panel (02) is bonded to the connecting cloth (03); The support assembly (01) includes: a rectangular frame (011) composed of bar structures and a first support rod group (012). The first support rod group (012) includes at least two first support rods (0121) with adjustable lengths. One end of the first support rod (0121) is fixedly connected to the corner of the rectangular frame (011), and the other end of the first support rod (0121) is fixedly connected to the other corner of the rectangular frame (011), or the other end of the first support rod (0121) is fixedly connected to the frame edge of the rectangular frame (011). The rectangular frame (011) is connected to the connecting cloth (03) through the plurality of elastic connecting members (04), and the rectangular frame (011) is used to support the connecting cloth (03); the rod diameter of the middle part of the at least two first support rods (0121) is smaller than that of the end part, and the at least two first support rods (0121) do not contact at the intersecting part; the support assembly (01) has a support surface, the support surface is parallel to the plate surface of the screen panel (02), and the support surface is a hollow surface formed by the rectangular frame (011) and the first support rod group (012); When the first support rod (0121) extends, the middle part of the first support rod (0121) bulges towards the side away from the screen panel (02), so that the corner of the rectangular frame (011) moves towards the side close to the connecting cloth (03); when the first support rod (0121) shortens, the middle part of the first support rod (0121) bulges towards the side close to the screen panel (02), so that the corner of the rectangular frame (011) moves towards the side away from the connecting cloth (03).

2. The projection screen according to claim 1, wherein One end of the first support rod (0121) is fixedly connected to the first corner of the rectangular frame (011), and the other end of the first support rod (0121) is fixedly connected to the second corner of the rectangular frame (011), and the first corner and the second corner are opposite corners of the rectangular frame (011).

3. The projection screen according to claim 2, wherein The support assembly (01) further includes: an adapter (013); The middle part of each first support rod (0121) is connected to the adapter (013).

4. The projection screen according to claim 3, wherein Each first support rod (0121) includes: a first sub-support rod (01211) and a second sub-support rod (01212) that are coaxial; One end of the first sub-support rod (01211) is fixedly connected to the first corner of the rectangular frame (011), and the other end of the first sub-support rod (01211) is fixedly connected to the adapter (013); One end of the second sub-support rod (01212) is fixedly connected to the adapter (013), and the other end of the second sub-support rod (01212) is fixedly connected to the second corner of the rectangular frame (011).

5. The projection screen according to claim 4, characterized in that, Both the first sub-support rod (01211) and the second sub-support rod (01212) are telescopic support rods.

6. The projection screen according to claim 5, characterized in that, Any one of the first sub-support rod (01211) and the second sub-support rod (01212) includes: a first sub-rod body, a second sub-rod body, and a third sub-rod body; One end of the first sub-rod body is fixedly connected to the first corner of the rectangular frame (011), the other end of the first sub-rod body is threadedly connected to one end of the second sub-rod body, the other end of the second sub-rod body is threadedly connected to one end of the third sub-rod body, and the other end of the third sub-rod body is fixedly connected to the adapter (013).

7. The projection screen according to claim 3, wherein The support assembly (01) further includes: a second support rod group (014), and the second support rod group (014) includes at least one second support rod (0141); One end of each second support rod (0141) is fixedly connected to the first frame side of the rectangular frame (011), and the other end of each second support rod (0141) is fixedly connected to the second frame side of the rectangular frame (011), and the first frame side and the second frame side are opposite sides of the rectangular frame (011).

8. The projection screen according to claim 7, characterized in that, The second support rod (0141) includes: a third sub-support rod (01411) and a fourth sub-support rod (01412); One end of the third sub-support rod (01411) is fixedly connected to the first frame side of the rectangular frame (011), and the other end of the third sub-support rod (01411) is fixedly connected to the adapter (013); One end of the fourth sub-support rod (01412) is fixedly connected to the adapter (013), and the other end of the fourth sub-support rod (01412) is fixedly connected to the second frame side of the rectangular frame (011).

9. The projection screen according to claim 8, wherein The cross-sections of both the third sub-support rod (01411) and the fourth sub-support rod (01412) are T-shaped, and the cross-sections of both the third sub-support rod (01411) and the fourth sub-support rod (01412) are perpendicular to the extending direction of the second support rod (0141).

10. A projection system, characterized in that, The projection system includes: an ultra-short throw laser projection device and the projection screen (00) according to any one of claims 1 to 9.

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