Projection screen and projection system

Abstract

The invention provides a projection screen and a projection system, and the projection screen comprises a display diaphragm which is provided with a projection light-receiving surface; the screen frame is arranged on the periphery of the display membrane in a surrounding mode, and the screen frame is provided with a stopping part; the tensioning module comprises a tensioning part and a force applying part, the tensioning part is provided with a connecting part and a tensioning part which are connected with each other, the connecting part is connected to the end of the display membrane, the tensioning part abuts against the side, away from the edge of the screen frame, of the stopping part under the pulling force of the display membrane, and the tensioning part and the screen frame are connected through the force applying part. The device is easy to assemble, time-saving and labor-saving, and good in user experience.

Description

Technical Field

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

[0002] With the continuous development of society, people's pursuits are also constantly changing, and projection display systems are increasingly used in people's work and life.

[0003] At present, large-sized laser TV screens cannot enter elevators due to their large size and need to be disassembled into parts for home use. Laser TV screens are mainly assembled from screen frames and display membranes, and have high requirements for the flatness of the display membranes. To ensure the flatness of the display membrane, the display membrane is generally tightened by screws or springs to flatten the display membrane and ensure the final display effect.

[0004] However, the existing solutions for flattening the display diaphragm have a large number of springs (screws), and the installation is time-consuming and labor-intensive; since the installation structures are all on the side, it is not easy to observe the position; the screws are tightened in the horizontal direction, because the screws are only a few millimeters to a dozen millimeters from the ground, and the screwdrivers (especially electric screwdrivers) are usually relatively thick, so when tightening, the screwdriver usually needs to be placed obliquely for tightening, which often damages the screw holes during the tightening process, or the screws cannot be tightened to the bottom, resulting in insufficient tension, and ultimately causing the flatness of the diaphragm to fail to meet the standard. Summary of the invention

[0005] The main purpose of the present invention is to provide a projection screen and a projection system, which are easy to assemble, save time and effort, and provide a good user experience.

[0006] To achieve the above objectives, in a first aspect, the present invention provides a projection screen, comprising:

[0007] A display film, wherein the display film has a projection light receiving surface;

[0008] A screen frame, which is arranged around the outer periphery of the display film and has a stopper;

[0009] The tensioning module includes a tensioning member and a force-applying member. The tensioning member has a connecting portion and a tensioning portion that are interconnected. The connecting portion is connected to the end of the display film. Under the pulling force of the display film, the tensioning portion is pressed against the side of the stop portion that is away from the edge of the screen frame. The force-applying member connects the tensioning portion and the screen frame.

[0010] The beneficial effects of the present invention are as follows: Through the setting of the tensioning module, the display diaphragm can be driven to stretch under the action of the tensioning member. Then, the tensioning member and the screen frame are fixed by the force-applying member to stably keep the display diaphragm in a tensioned state, making the display diaphragm flat. Further, when the projection image is displayed, it is clear and has uniform brightness, which is convenient for users to view and has good effects. In addition, since the force application direction of the tensioning member is tightened from top to bottom, and at the same time, both the tensioning member and the force-applying member are outside the screen frame, that is, both the tensioning member and the force-applying member are exposed, the installation operation of the display diaphragm is more convenient, thereby shortening the installation time, saving time and effort, and improving the user experience.

[0011] Based on the above technical solutions, the present invention can be further improved as follows.

[0012] In some alternative embodiments, the stop portion is connected to the edge of the screen frame, and the free end of the stop portion protrudes toward the side of the screen frame facing away from the display diaphragm.

[0013] In some alternative embodiments, the tensioning portion passes over the free end of the stop portion from the side of the stop portion facing the edge of the screen frame and abuts against the stop portion to tension the display diaphragm.

[0014] In some alternative embodiments, the screen frame includes an inner frame, the stop portion is connected to the end edge of the inner frame, and a limiting groove is formed between the stop portion and the side wall of the inner frame, and the tensioning portion abuts in the limiting groove.

[0015] In some alternative embodiments, the free end of the stop portion is inclined toward the middle of the inner frame relative to the stop portion to block at least part of the tensioning portion on the side facing away from the inner frame, and the shape of the tensioning portion matches the shape of the limiting groove.

[0016] In some alternative embodiments, the tensioning portion has an extension section extending toward the middle of the inner frame, the extension section is attached to the side wall of the inner frame, and the force-applying member fixes the extension section and the side wall of the inner frame.

[0017] In some alternative embodiments, an installation notch is provided on the extension section, an installation hole is provided on the inner frame, and the force-applying member sequentially passes through the installation notch and the installation hole to relatively fix the tensioning portion and the inner frame.

[0018] In some alternative embodiments, the tensioning member is a bent member formed by bending a plate, and the extending direction of the tensioning member is along the side of the screen frame.

[0019] In a second aspect, the present invention further provides a projection screen, including:

[0020] A display diaphragm, which is configured to display a projection image;

[0021] A screen frame, the screen frame being configured to accommodate a display film;

[0022] The tensioning module includes a tensioning member, which is connected to the display film and flips and moves relative to the screen frame so that the display film is tensioned by the movement of the tensioning member.

[0023] In a third aspect, the present invention further provides a projection system, comprising a projection device and the above-mentioned projection screen, wherein the projection device is used to project a projection picture onto the projection screen.

[0024] The present invention provides a projection screen and a projection system, wherein the projection system comprises a projection device and a projection screen, wherein the projection device is used to project a projection picture onto the projection screen; wherein the projection screen comprises: a display film, wherein the display film has a projection light-receiving surface; a screen frame, wherein the screen frame is arranged around the periphery of the display film, and wherein the screen frame has a stopper; and a tensioning module, wherein the tensioning module comprises a tensioning member and a force-applying member, wherein the tensioning member has a connecting portion and a tensioning portion that are interconnected, wherein the connecting portion is connected to an end portion of the display film, wherein the tensioning portion is pressed against a side of the stopper that is away from an edge of the screen frame under the pulling force of the display film, and wherein the force-applying member connects the tensioning member and the screen frame.

[0025] By setting the tensioning module, the display diaphragm can be stretched under the action of the tensioning member, and the tensioning member and the screen frame are fixed by the force member to stabilize the display diaphragm in a tensioned state, so that the display diaphragm is flat, and further the projection image is displayed clear and uniformly bright, which is convenient for users to watch and has a good effect; in addition, since the force direction of the tensioning member is tightened from top to bottom, at the same time, the tensioning member and the force member are both on the outside of the screen frame, that is, the tensioning member and the force member are exposed, which makes the installation operation of the display diaphragm more convenient, thereby shortening the installation time, saving time and effort, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] Figure 1 It is a schematic diagram of the installation of a projection screen from a first viewing angle in the prior art;

[0028] Figure 2 It is a schematic diagram of the installation of the second viewing angle of the projection screen in the prior art;

[0029] Figure 3 A schematic diagram of the structure of a projection screen provided in an embodiment of the present application;

[0030] Figure 4 It is a schematic structural diagram of the first perspective of the inner frame in the projection screen provided by the embodiment of the present application;

[0031] Figure 5 It is Figure 4 the partial enlarged view at I in

[0032] Figure 6 It is a schematic structural diagram of the second perspective of the inner frame in the projection screen provided by the embodiment of the present application;

[0033] Figure 7 It is Figure 6 the partial enlarged view at II in

[0034] Figure 8 It is a schematic structural diagram of the third perspective of the inner frame in the projection screen provided by the embodiment of the present application;

[0035] Figure 9 It is a schematic diagram of the first state of the tensioning module in the projection screen provided by the embodiment of the present application;

[0036] Figure 10 It is a schematic diagram of the second state of the tensioning module in the projection screen provided by the embodiment of the present application;

[0037] Figure 11 It is a schematic structural diagram of the tensioning module in the projection screen provided by the embodiment of the present application;

[0038] Figure 12 It is a side view of the tensioning module in the projection screen provided by the embodiment of the present application.

[0039] Explanation of reference numerals:

[0040] 100 - Projection screen;

[0041] 100 - Projection screen;

[0042] 110 - Display film;

[0043] 111 - Film body;

[0044] 112 - Connecting cloth;

[0045] 120 - Screen frame;

[0046] 121 - Inner frame;

[0047] 1211 - Stopping portion;

[0048] 1212 - Limiting groove;

[0049] 130 - Tensioning module;

[0050] 131 - Tension member;

[0051] 1311 - Connecting part;

[0052] 1312 - Tension part;

[0053] 13121 - Extension section;

[0054] 132 - Force - applying member;

[0055] 140 - Installation notch;

[0056] 150 - Connecting member;

[0057] 200 - Screwdriver. Detailed implementation manner

[0058] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. All other embodiments obtained shall fall within the protection scope of the present invention. Without conflict, the following embodiments and the features in the embodiments may be combined with each other.

[0059] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention may be understood according to specific circumstances.

[0060] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0061] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0062] Figure 1 It is a schematic installation diagram of the first perspective of a prior art projection screen. Figure 2 It is a schematic installation diagram of the second perspective of a prior art projection screen. As Figure 1 and Figure 2 shown, currently, for large-sized laser TV screens, due to their large size, they cannot enter the elevator and need to be disassembled into loose parts to enter the household. The laser TV screen is mainly assembled by an inner frame 121 and a display film 110, and there are relatively high requirements for the flatness of the display film 110. To ensure the flatness of the display film 110, generally, the display film 110 is tensioned by screws or springs, so as to flatten the display film 110 and ensure the final display effect. However, in the existing solutions for flattening the display film 110, the number of springs (screws) is large, and the installation is time-consuming and laborious; since the installation structures are all on the side, it is not easy to observe the position; the tightening direction of the screws is in the horizontal direction. Because the distance between the screws and the ground is only a few millimeters to about a dozen millimeters, and the screwdriver 200 (especially an electric screwdriver) is usually relatively thick, when tightening, the screwdriver 200 usually needs to be placed obliquely to tighten, which often damages the screw holes during the tightening process, or the screws cannot be tightened to the end, resulting in insufficient tension and ultimately the flatness of the display film 110 not meeting the standard.

[0063] In order to overcome the defects in the prior art, the projection screen and projection system provided by the present invention, through the setting of the tensioning module, enable the display film to be stretched under the action of the tensioning member, and then fix the tensioning member and the screen frame through the force-applying member to stably keep the display film in a tightened state, so that the display film is flattened, further making the projection picture clear and the brightness uniform when displayed, facilitating the user to watch, with good effects; in addition, since the force application direction of the tensioning member is tightened from top to bottom, and at the same time, both the tensioning member and the force-applying member are outside the screen frame, that is, both the tensioning member and the force-applying member are exposed, making the installation operation of the display film more convenient, thereby shortening the installation time, saving time and labor, and improving the user experience.

[0064] The content of the present invention will be described in detail below in conjunction with the accompanying drawings so that those skilled in the art can understand the content of the present invention more clearly and in detail.

[0065] Figure 3 A schematic diagram of the structure of a projection screen provided in an embodiment of the present application, Figure 4 This is a schematic diagram of the structure of the first viewing angle of the inner frame in the projection screen provided in an embodiment of the present application, Figure 5 for Figure 4 The local enlarged view of point I in the middle, Figure 6 A schematic diagram of the structure of a second viewing angle of an inner frame in a projection screen provided in an embodiment of the present application, Figure 7 for Figure 6 A partial enlarged view of II in the middle. Figure 8 A schematic structural diagram of a third viewing angle of an inner frame in a projection screen provided in an embodiment of the present application.

[0066] like Figures 3 to 8 As shown, the embodiment of the present application provides a projection screen 100, including:

[0067] Display film 110, display film 110 has a projection light receiving surface;

[0068] It can be understood that the front side of the display film 110 is the projection light receiving surface.

[0069] A screen frame 120, the screen frame 120 is disposed around the outer periphery of the display film 110, and the screen frame 120 has a stopper 1211;

[0070] The tensioning module 130 includes a tensioning member 131 and a force-applying member 132. The tensioning member 131 has a connecting portion 1311 and a tensioning portion 1312 that are connected to each other. The connecting portion 1311 is connected to the end of the display film 110. The tensioning portion 1312 is pressed against the side of the stop portion 1211 that is away from the edge of the screen frame 120 under the pulling force of the display film 110. The force-applying member 132 connects the tensioning portion 1312 and the screen frame 120.

[0071] Through the above settings, that is, through the settings of the tensioning module 130, the display diaphragm 110 can be driven to stretch under the action of the tensioning member 131. Then, by fixing the tensioning member 131 and the screen frame 120 with the force - applying member 132, the display diaphragm 110 is stably in a taut state, making the display diaphragm 110 flat. Further, when the projection screen is displayed, it is clear and has uniform brightness, which is convenient for users to watch and has a good effect. In addition, since the force - applying direction of the tensioning member 131 is tightened from top to bottom, and at the same time, both the tensioning member 131 and the force - applying member 132 are outside the screen frame 120, that is, both the tensioning member 131 and the force - applying member 132 are exposed, the installation operation of the display diaphragm 110 is more convenient, thereby shortening the installation time, saving time and effort, and improving the user experience.

[0072] It should be noted that the following specifically describes each structure.

[0073] It should be noted that the display diaphragm 110 usually consists of a hard layer, a Fresnel structure layer, a projection layer, etc., has a certain strength and stiffness, and can have a certain verticality in the vertical free - hanging state, making the display diaphragm 110 look flat. However, due to still having a certain softness, without support or being interfered by external forces, the display diaphragm 110 still cannot meet the flatness requirements for display. If the screen is not flat, the laser projection screen will be deformed, blurred, have uneven brightness, or other deterioration problems when displayed.

[0074] In order to flatten the display diaphragm 110, in some alternative embodiments, the display diaphragm 110 includes a diaphragm body 111 and a connecting cloth 112 that are attached to each other.

[0075] Generally, the diaphragm body 111 is made of a hard and straight material, and the connecting cloth 112 generally has characteristics such as inelasticity, ultra - thinness, density, and high strength. When the connecting cloth 112 and the diaphragm body 111 are bonded, an integral structure can be formed between the two, thereby facilitating the transmission of force and enabling the diaphragm body 111 to stretch following the deformation of the connecting cloth 112.

[0076] Specifically, the connecting cloth 112 can generally be a soft cloth. In this way, the connecting cloth 112 can better transmit the acting force when being stretched, and its properties are relatively stable, and it can adapt to a relatively wide range of environments. For example, it can maintain good flatness and reliability between the environmental temperatures of - 10°C and 40°C.

[0077] In addition, it should be noted that the screen frame 120 is generally a frame structure, and the screen frame 120 encloses a rectangular or square hollow area, which can be used to place the display diaphragm 110. The screen frame 120 can surround the edge of the display diaphragm 110 to provide protection for the display diaphragm 110, and the screen frame 120 and the display diaphragm 110 are connected and tensioned through a deformable or displaceable tensioning module 130.

[0078] In some examples, the stop portion 1211 is located at the end of the screen frame 120.

[0079] In some examples, the screen frame 120 can be a metal part, and its material can include one or more of copper, iron, aluminum, tin, and lead.

[0080] In other examples, the screen frame 120 can be made of plastic.

[0081] It should be noted that the specific material of the screen frame 120 is not overly limited in the embodiments of the present application.

[0082] Of course, during production and manufacturing, on the premise of ensuring strength, the screen frame 120 can also be made of steel plates, plastics, or composite materials.

[0083] Among them, the screen frame 120 can be a single-piece or composed of multiple side frames assembled together. Generally, considering the convenience of installation, it can be composed of multiple side frames assembled together. However, in practice, it can be determined according to the size, and there is no excessive limitation here.

[0084] It can be understood that the connecting portion 1311 is connected to the end of the display diaphragm 110. By pulling the connecting portion 1311, the connecting cloth 112 of the display diaphragm 110 can be driven to move, so that the display diaphragm 110 is in a tensioned state.

[0085] Figure 9 This is a schematic diagram of the first state of the tensioning module in the projection screen provided by the embodiments of the present application. Figure 10 This is a schematic diagram of the second state of the tensioning module in the projection screen provided by the embodiments of the present application.

[0086] As Figures 3 to 10 shown, it should be noted that when the display diaphragm 110 is in a tensioned state, the tensioning portion 1312 is flipped and abuts against the side wall of the stop portion 1211 at this time, and the force-applying member 132 is used to fix the tensioning portion 1312 and the screen frame 120 to stabilize the tensioned state of the display diaphragm 110.

[0087] In some embodiments, the user presses the tensioning portion 1312 by hand, causing the tensioning portion 1312 to flip along the edge of the screen frame 120. During the flipping process, the tensioning portion 1312 tightens the display diaphragm 110 through the connecting portion 1311. When the tensioning portion 1312 completely abuts against the stop portion 1211, the tensioning force on the display diaphragm 110 reaches the maximum and is fixed through the force applying member 132.

[0088] It should be noted that, in some embodiments, the connecting portion 1311 and the tensioning portion 1312 are connected by an integral connection method. In other embodiments, the connecting portion 1311 and the tensioning portion 1312 can also be connected by other connection methods. As long as the connecting portion 1311 and the tensioning portion 1312 can be fixedly connected, the purpose of this embodiment can be achieved. Here, the connection method of the connecting portion 1311 and the tensioning portion 1312 is not limited.

[0089] In some embodiments, the connecting portion 1311 and the tensioning portion 1312 are integrally formed, which can ensure that the connecting portion 1311 and the tensioning portion 1312 are integrally formed and manufactured and are inseparable structures. On the one hand, the number of parts used can be reduced, the assembly difficulty and the requirements for assembly accuracy can be lowered, the process of welding the connecting portion 1311 and the tensioning portion 1312 can be omitted, and the assembly efficiency can be improved. On the other hand, the overall stiffness of the tensioning member 131 can be increased, the possibility of loosening between the connecting portion 1311 and the tensioning portion 1312 can be reduced, and the structural strength is relatively high.

[0090] It should be noted that by integrally forming the connecting portion 1311 and the tensioning portion 1312, not only can the connection strength between the connecting portion 1311 and the tensioning portion 1312 be improved, but also a seamless connection between the connecting portion 1311 and the tensioning portion 1312 can be achieved, thereby reducing the risk of cracking at the connection position between the connecting portion 1311 and the tensioning portion 1312.

[0091] As Figures 3 to 10 shown, in some alternative embodiments, the stop portion 1211 is connected to the edge of the screen frame 120, and the free end of the stop portion 1211 protrudes toward the side of the screen frame 120 away from the display diaphragm 110.

[0092] It should be noted that the stop portion 1211 is formed on the screen frame 120 along the side away from the display diaphragm 110 and extends toward the middle of the display diaphragm 110.

[0093] As Figures 3 to 10 shown, in some alternative embodiments, the tensioning portion 1312 passes over the free end of the stop portion 1211 from the side of the stop portion 1211 facing the edge of the screen frame 120 and abuts against the stop portion 1211 to tension the display diaphragm 110.

[0094] It should be noted that the tensioning portion 1312 is flipped from the side of the stopper portion 1211 facing the edge of the screen frame 120 until it crosses the free end of the stopper portion 1211 and is stuck in the stopper portion 1211 to ensure that the display diaphragm 110 is in a tensioned state.

[0095] As Figures 3 to 10 shown, in some alternative embodiments, the screen frame 120 includes an inner frame 121. The stopper portion 1211 is connected to the end edge of the inner frame 121, and a limiting groove 1212 is formed between the stopper portion 1211 and the side wall of the inner frame 121. The tensioning portion 1312 abuts against the inside of the limiting groove 1212.

[0096] It should be noted that when the display diaphragm 110 is tensioned, the tensioning portion 1312 is flipped until it abuts against the groove wall of the limiting groove 1212.

[0097] Exemplarily, as Figure 9 shown, the tensioning portion 1312 can be flipped clockwise until it abuts against the groove wall of the limiting groove 1212.

[0098] Exemplarily, the tensioning portion 1312 can be flipped counterclockwise until it abuts against the groove wall of the limiting groove 1212.

[0099] Of course, it should be noted that the clockwise or counterclockwise flipping direction of the tensioning portion 1312 can be determined according to the actual situation and the corresponding viewing angle.

[0100] In some examples, the screen frame 120 further includes an outer frame. The outer frame surrounds the inner frame 121 on all four sides, and the material used for the outer frame can be the same as that of the inner frame 121.

[0101] In some alternative embodiments, the free end of the stopper portion 1211 is inclined towards the middle of the inner frame 121 relative to the stopper portion 1211 to block at least part of the side of the tensioning portion 1312 facing away from the inner frame 121, and the shape of the tensioning portion 1312 matches the shape of the limiting groove 1212.

[0102] It can be understood that there is an included angle between the extending direction of the stopper portion 1211 and the extending direction of the inner frame 121. Specifically, the angle of the included angle can be adjusted according to the actual situation, and the embodiments of the present application do not limit it too much here.

[0103] It should be noted that the limiting groove 1212 is formed by the stopper portion 1211 and the side wall of the inner frame 121 and is triangular. Among them, the tensioning portion 1312 can also be triangular to be clamped in the limiting groove 1212.

[0104] In another embodiment, the tensioning portion 1312 may be a circular structure, an oval structure, or a special-shaped structure, as long as it can ensure that the tensioning portion 1312 flips along the edge of the inner frame 121, that is, after flipping around the stop portion 1211, it can be snapped into the limiting groove 1212, and there is no further limitation here.

[0105] In some alternative embodiments, the tensioning portion 1312 has an extension section 13121 extending towards the middle of the inner frame 121. The extension section 13121 is arranged in contact with the side wall of the inner frame 121, and the force applying member 132 fixes the extension section 13121 and the side wall of the inner frame 121.

[0106] It should be noted that considering cost issues and avoiding the problem that the space occupied by the tensioning portion 1312 is too large and thus affecting the size of the entire projection screen 100, the tensioning portion 1312 has an extension section 13121, and the extension section 13121 is a horizontal section. When the tensioning portion 1312 flips along the edge of the inner frame 121, that is, after flipping around the stop portion 1211 and can be snapped into the limiting groove 1212, the extension section 13121 is in contact with the side wall of the inner frame 121, which is convenient for the force applying member 132 to connect the extension section 13121 and the inner frame 121.

[0107] Among them, the extension section 13121 is in the shape of a thin sheet and has a certain rigidity to improve the overall stability. At the same time, it is also convenient for the fixation of the force applying member 132.

[0108] Figure 11 This is a schematic structural diagram of the tensioning module in the projection screen provided by the embodiment of the present application, as Figures 3 to 11 shown. In some alternative embodiments, an installation notch 140 is provided on the extension section 13121, and an installation hole is provided on the inner frame 121. The force applying member 132 sequentially passes through the installation notch 140 and the installation hole to relatively fix the tensioning portion 1312 and the inner frame 121.

[0109] It can be understood that the installation notches 140 and the installation holes correspond one by one, and among them, the sizes of the installation notches 140 and the installation holes match each other.

[0110] In some embodiments, it should be noted that in the embodiment of the present application, considering the cost of the force applying member 132, the force applying member 132 may be a screw. Correspondingly, the installation hole may be a threaded hole, and the installation notch 140 may be a through hole. The force applying member 132 can pass through the installation notch 140 and the installation hole, and through screwing, the tensioning portion 1312 and the inner frame 121 can be fixed, and then the display film 110 can be tensioned.

[0111] Specifically, the force - applying member 132 passes through the mounting hole and is tightened, thereby fixing the force - applying member 132 to the screen frame 120. Of course, when it is necessary to remove the force - applying member 132, only need to loosen the force - applying member 132, and then take out the force - applying member 132 from the mounting hole in sequence.

[0112] It should be noted that the mounting notch 140 can also be a threaded hole, and specific details are not limited too much here.

[0113] In addition, it should be noted that generally, the user presses the extension section 13121. After the extension section 13121 flips around the stop portion 1211, it gets closer and closer to the side wall of the inner frame 121. During this process, the extension section 13121 drives the connecting cloth 112 to move backward, achieving the effect of tensioning and flattening the display diaphragm 110. After pressing the extension section 13121 downward to a certain extent, then fasten the force - applying member 132 to the position of the mounting hole on the inner frame 121. Through the process of tightening the force - applying member 132 from top to bottom, the force - applying member 132 will abut against the extension section 13121 and finally flatten the extension section 13121. When the extension section 13121 changes from being warped to being flattened, it drives the connecting cloth 112 to be tensioned, thereby achieving the effect of flattening the diaphragm. At this time, the tensioning portion 1312 is completely clamped in the limiting groove 1212.

[0114] In addition, it should be noted that the size of the mounting notch 140 matches the shape and size of the force - applying member 132, facilitating the force - applying member 132 to pass through the mounting notch 140.

[0115] In some embodiments, the mounting notch 140 can be in any shape such as square, oval, trapezoid, etc. For this, this embodiment does not make specific limitations.

[0116] In some embodiments, considering the manufacturing tolerance of the structure, when the mounting notch 140 and the mounting hole

[0117] are not aligned, in order to facilitate the one - to - one correspondence and matching between the mounting notch 140 and the mounting hole, the mounting notch 140 can be designed as a long - strip hole, facilitating the fixation of the force - applying member 132, and further achieving the purpose of pressing the extension section 13121 downward.

[0118] In addition, in some other embodiments, in order to facilitate the installation or placement of the force - applying member 132, an edge opening is provided at the edge of the extension section 13121, and the edge opening is communicated with the mounting notch 140, so that the force - applying member 132 can directly extend into the mounting notch 140 from the edge opening.

[0119] Figure 12 This is a side view of the tensioning module in the projection screen provided by the embodiment of the present application, as Figure 3 and Figure 12As shown, in some alternative embodiments, the tension member 131 is a bent member formed by bending a sheet, and the extending direction of the tension member 131 is along the side of the screen frame 120.

[0120] It can be understood that such a setting can reduce costs and weight while ensuring the rigidity requirements.

[0121] As Figures 3 to 10 shown, in some embodiments, it further includes a connecting member 150. Among them, one end of the connecting member 150 is connected to the end of the display diaphragm 110, and the other end of the connecting member 150 is connected to the connecting portion 1311.

[0122] Specifically, the connecting cloth 112 has a cloth bag, the connecting member 150 is passed through the cloth bag, and then the connecting member 150 is snapped into the groove on the tension member 131 to achieve the connection with the tension member 131. Thus, when the tension member 131 flips, it further drives the connecting member 150 to move, and further drives the display diaphragm 110 to be in a stretched state.

[0123] In some embodiments, the extending direction of the groove is consistent with the extending direction of the connecting member 150.

[0124] In order to better connect the display diaphragm 110, generally, the extending length of the connecting member 150 is greater than the extending length of the groove, that is to say, the connecting member 150 protrudes from the end of the groove.

[0125] In some embodiments, the connecting cloth 112 follows the shape of the inner frame 121, bypasses the end of the inner frame 121 to form a back pull, and the entire connecting cloth 112 is sleeved on the connecting member 150.

[0126] In some examples, the connecting member 150 can be a connecting rod. Snapping into the groove can prevent the connecting member 150 from disengaging from the groove along its moving direction.

[0127] Of course, the connecting member 150 can be of other structures. Specifically, the embodiments of the present application do not limit this too much here.

[0128] In some examples, the groove can be in any shape such as square, oval, arc-shaped, trapezoidal, etc. The present embodiment does not make specific limitations on this.

[0129] It should be noted that the cross-section of the groove can be 3 / 4 circle. The connecting member 150 therein can be a connecting rod. It extends into the groove through the end of the groove, and due to the opening design, it is snapped into the groove.

[0130] In addition, it should be noted that the radial dimension of the opening and the radial dimension of the connecting member 150 can be adjusted according to the actual situation. Specifically, the embodiments of the present application do not limit this too much here.

[0131] The projection screen provided by the embodiment of the present application includes: a display film, the display film has a projection light-receiving surface; a screen frame, the screen frame is arranged around the outer periphery of the display film, and the screen frame has a stopper; a tensioning module, the tensioning module includes a tensioning member and a force-applying member, the tensioning member has a connecting portion and a tensioning portion that are interconnected, the connecting portion is connected to the end of the display film, the tensioning portion is pressed against the side of the stopper away from the edge of the screen frame under the pulling force of the display film, and the force-applying member connects the tensioning portion and the screen frame.

[0132] By setting the tensioning module, the display diaphragm can be stretched under the action of the tensioning member, and the tensioning member and the screen frame are fixed by the force member to stabilize the display diaphragm in a tensioned state, so that the display diaphragm is flat, and further the projection image is displayed clear and uniformly bright, which is convenient for users to watch and has a good effect; in addition, since the force direction of the tensioning member is tightened from top to bottom, at the same time, the tensioning member and the force member are both on the outside of the screen frame, that is, the tensioning member and the force member are exposed, which makes the installation operation of the display diaphragm more convenient, thereby shortening the installation time, saving time and effort, and improving the user experience.

[0133] In addition, if Figures 3 to 12 As shown, the embodiment of the present application further provides a projection screen 100, comprising:

[0134] A display film 110, wherein the display film 110 is configured to display a projection image;

[0135] A screen frame 120 , wherein the screen frame 120 is configured to accommodate the display film 110 ;

[0136] The tensioning module 130 includes a tensioning member 131 . The tensioning member 131 is connected to the display film 110 and is flipped and moved relative to the screen frame 120 , so that the display film 110 is tensioned by the movement of the tensioning member 131 .

[0137] The projection screen provided in the embodiment of the present application, through the setting of the tensioning module, allows the display film to be stretched under the action of the tensioning member, and then the tensioning member and the screen frame are fixed by the force-applying member to stabilize the display film in a tensioned state, so that the display film is flat, and further the projection image is displayed clear and uniformly bright, which is convenient for users to watch and has a good effect; in addition, because the force-applying direction of the tensioning member is tightened from top to bottom, at the same time, the tensioning member and the force-applying member are both on the outside of the screen frame, that is, the tensioning member and the force-applying member are both exposed, which makes the installation operation of the display film more convenient, thereby shortening the installation time, saving time and effort, and improving the user experience.

[0138] In addition, an embodiment of the present application further provides a projection system, including a projection device and the above-mentioned projection screen 100, and the projection device is used to project a projection image onto the projection screen 100.

[0139] The projection system provided in this embodiment specifically includes a projection device and the projection screen 100 in the foregoing embodiment, and the projection device is used to project a projection image onto the display film 110 of the projection screen 100.

[0140] Among them, the specific structure, working principle, and function of the projection screen 100 have been described in detail in the foregoing Embodiment 1, and will not be elaborated here.

[0141] Specifically, in the projection system of this embodiment, the projection device can be various existing projectors, such as a laser projector, etc. The projection device can project a projection image onto the display film 110 of the projection screen 100, so that the display film 110 can display the projection image for people to watch.

[0142] For the projection system provided in this embodiment, among them, the specific structure, working principle, and function of the projection screen 100 have been described in detail in the foregoing Embodiment 1, and will not be elaborated here.

[0143] Through the setting of the tensioning module, the display film can be driven to stretch under the action of the tensioning member. By fixing the tensioning member and the screen frame with the force-applying member, the display film is stably in a taut state, making the display film flat. Further, when the projection image is displayed, it is clear and has uniform brightness, which is convenient for users to watch and has a good effect. In addition, since the force application direction of the tensioning member is tightened from top to bottom, and at the same time, the tensioning member and the force-applying member are both outside the screen frame, that is, the tensioning member and the force-applying member are both exposed, the installation operation of the display film is more convenient, thereby shortening the installation time, saving time and effort, and improving the user experience.

[0144] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0145] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0146] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A projection screen, It is characterized in that include: A display film, wherein the display film has a projection light receiving surface; A screen frame, the screen frame is arranged around the periphery of the display film, and the screen frame has a stopper; A tensioning module, the tensioning module includes a tensioning member and a force-applying member, the tensioning member has a connecting portion and a tensioning portion that are interconnected, the connecting portion is connected to the end of the display film, the tensioning portion is pressed against the side of the stop portion that is away from the edge of the screen frame under the tension of the display film, and the force-applying member connects the tensioning portion and the screen frame.

2. The projection screen according to claim 1, It is characterized in that The stopper is connected to the edge of the screen frame, and the free end of the stopper protrudes toward the side of the screen frame away from the display film.

3. The projection screen according to claim 2, It is characterized in that The tensioning portion passes over the free end of the stopper portion from the side of the stopper portion facing the edge of the screen frame and then abuts against the stopper portion to tension the display film.

4. The projection screen according to any one of claims 1 to 3, It is characterized in that The screen frame comprises an inner frame, the stopper is connected to the end edge of the inner frame and forms a limiting groove with the side wall of the inner frame, and the tensioning part abuts against the limiting groove.

5. The projection screen according to claim 4, It is characterized in that The free end of the stopper is inclined relative to the stopper toward the middle of the inner frame to block at least part of the tensioning portion on a side away from the inner frame, and the shape of the tensioning portion matches the shape of the limiting groove.

6. The projection screen according to claim 4, It is characterized in that The tensioning portion has an extension section extending toward the middle of the inner frame, the extension section and the side wall of the inner frame are arranged in close contact, and the force applying member fixes the extension section and the side wall of the inner frame.

7. The projection screen according to claim 6, It is characterized in that The extension section is provided with a mounting notch, the inner frame is provided with a mounting hole, and the force applying member passes through the mounting notch and the mounting hole in sequence, so that the tensioning portion and the inner frame are relatively fixed.

8. The projection screen according to any one of claims 1 to 3, It is characterized in that The tensioning member is a bent member formed by bending a plate material, and an extending direction of the tensioning member is along the side edge of the screen frame.

9. A projection screen, It is characterized in that include: A display film, wherein the display film is configured to display a projection picture; A screen frame, the screen frame being configured to accommodate the display film; The tensioning module includes a tensioning member, which is connected to the display film and flips and moves relative to the screen frame, so that the display film is tensioned by the movement of the tensioning member.

10. A projection system, It is characterized in that It comprises a projection device and a projection screen as described in any one of claims 1 to 9, wherein the projection device is used to project a projection picture onto the projection screen.

Images