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 diaphragm in a surrounding manner; the tensioning module is movably arranged on the screen frame and faces the display membrane, the tensioning module comprises a tensioning piece, the tensioning piece is provided with a telescopic part, the telescopic part faces the display membrane and is connected with the end of the display membrane, and the telescopic part is constructed to move relative to the screen frame so that the display membrane can be in a stretched state. The display diaphragm is flat, so that the projection picture is clear and uniform in brightness when being displayed, a user can conveniently watch the projection picture, the effect is good, and the mounting efficiency is relatively high.

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 science and technology, projection display systems are increasingly used in people's work and life. Among them, laser projection gradually occupies the market due to its advantages such as wide color gamut, high brightness and long life.

[0003] At present, laser TV is an ultra-short-throw projector with a short focal length and a small projection, which requires a high degree of screen flatness. In order to ensure a high degree of flatness, laser TV screens often use multiple spring tensioning methods to meet the high flatness requirements.

[0004] However, the existing installation method has a large number of springs, and the assembly and installation are complicated. The larger the size, the more springs there are, and the assembly is time-consuming and laborious. Summary of the invention

[0005] The main purpose of the present invention is to provide a projection screen and a projection system, which can realize flatness of the display film, further make the projection picture clear and uniform in brightness, facilitate users to watch, have good effect and high installation efficiency.

[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 membrane;

[0009] The tensioning module is movably arranged on the screen frame and faces the display membrane. The tensioning module includes a tensioning member. The tensioning member has a telescopic portion. The telescopic portion faces the display membrane and is connected to the end of the display membrane. The telescopic portion is constructed to move relative to the screen frame to put the display membrane in a stretched state.

[0010] The beneficial effects of the present invention are as follows: through the setting of the tensioning module, the display film can be stretched when the telescopic part of the tensioning member is in the telescopic state, so that the display film is flattened, and further the projection image is displayed clearly with uniform brightness, which is convenient for users to watch and has a good effect. In addition, the assembly is simple, and workers are easier to operate, which saves processing costs and improves efficiency.

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

[0012] In some optional embodiments, the tensioning member is configured to drive the display film to stretch toward the outer edge of the screen frame by its own movement; or,

[0013] The tensioning member is configured to drive the display film to bypass the outer edge of the screen frame through its own movement and stretch toward the back side of the screen frame.

[0014] In some optional implementations, the moving direction of the telescopic portion matches the stretching direction of the display film.

[0015] In some optional embodiments, the projection screen further comprises a fixing member, one side of which is connected to the end of the display film, and the other side of which is connected to the telescopic portion;

[0016] The screen frame has a sliding groove, an installation groove and a through hole. The sliding groove is used to accommodate a fixing part, the installation groove is used to install a tensioning module, and the through hole is used to connect the sliding groove and the installation groove so that the telescopic part extends into the sliding groove through the through hole to drive the fixing part to move in the sliding groove.

[0017] In some optional embodiments, the tensioning module further includes a mounting seat and a spring pin module, the mounting seat having a plurality of grooves, and the plurality of grooves are spaced apart and arranged on the mounting seat;

[0018] There are multiple spring pin modules, which are configured to be inserted into the grooves so as to be installed on the mounting seat.

[0019] In some optional embodiments, the elastic pin module includes a housing and a pressing member, and the tensioning member and the pressing member are both movably arranged relative to the housing;

[0020] The pressing member has a clamping portion, the tensioning member has a clamping slot, and the pressing member is configured to press itself to make the clamping portion and the clamping slot clamped or disengaged from the clamping slot;

[0021] When the clamping portion is disengaged from the clamping slot, the telescopic portion of the tensioning member moves relative to the pressing member to drive the display film to move to a stretched state.

[0022] In some optional embodiments, the cross section of the clamping portion is stepped, the clamping portion includes a connecting column and a clamping block connected to an end of the connecting column, and the radial dimension of the connecting column is smaller than the radial dimension of the clamping block;

[0023] The card slot includes an avoidance area and a guide area connected to one side of the avoidance area, the guide area extends along the moving direction of the tensioning member, and the radial dimension of the avoidance area is greater than the width of the guide area;

[0024] When the radial dimension of the connecting column matches the width of the guide area, the connecting column moves along the extension direction of the guide area; when the radial dimension of the avoidance area matches the radial dimension of the clamping block, the clamping block is clamped in the avoidance area.

[0025] In some optional embodiments, the elastic pin module further includes a first elastic member and a second elastic member, the first elastic member is located between the inner wall of the housing and the pressing member, and the second elastic member is located between the inner wall of the housing and the tensioning member, and when the card block is inserted into the card slot, the first elastic member and the second elastic member are both in a compressed state;

[0026] The moving direction of the tensioning member matches the moving direction of the first elastic member, and the moving direction of the pressing member matches the moving direction of the second elastic member.

[0027] In a second aspect, the present invention further provides a projection screen, comprising:

[0028] A display film, the display film is configured to display a projection image;

[0029] A screen frame, the screen frame being configured to accommodate a display film;

[0030] The tensioning module is arranged on the screen frame, the tensioning module is connected to the display film, and the tensioning module is constructed to drive the display film to stretch by its own movement.

[0031] 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.

[0032] The present invention provides a projection screen and a projection system, wherein the projection system comprises a projection device and the above-mentioned 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; a tensioning module, wherein the tensioning module is movably arranged on the screen frame and faces the display film, wherein the tensioning module comprises a tensioning member, wherein the tensioning member has a telescopic portion, wherein the telescopic portion faces the display film and is connected to the end of the display film, wherein the telescopic portion is constructed to move relative to the screen frame so as to put the display film in a stretched state.

[0033] By setting the tensioning module, the display membrane can be stretched when the telescopic part of the tensioning member is in the telescopic state, so that the display membrane is flat, and further the projection image is displayed clear and uniform in brightness, which is convenient for users to watch and has a good effect. In addition, the assembly is simple and easier for workers to operate, which saves processing costs and improves efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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.

[0035] Figure 1 An exploded view of a projection screen provided in an embodiment of the present application;

[0036] Figure 2 A schematic diagram of the structure of a display film in a projection screen provided in an embodiment of the present application;

[0037] Figure 3 for Figure 2 A partial enlarged view of point I in the middle;

[0038] Figure 4 A schematic diagram of the structure of a first viewing angle of a screen frame in a projection screen provided in an embodiment of the present application;

[0039] Figure 5 A schematic diagram of the structure of a second viewing angle of a screen frame in a projection screen provided in an embodiment of the present application;

[0040] Figure 6 A schematic diagram of the structure of a third viewing angle of a screen frame in a projection screen provided in an embodiment of the present application;

[0041] Figure 7 A cross-sectional view of a projection screen provided in an embodiment of the present application;

[0042] Figure 8 A schematic structural diagram of a first viewing angle of a spring pin module in a projection screen provided in an embodiment of the present application;

[0043] Fig. 9 A schematic structural diagram of a first viewing angle of a spring pin module in a projection screen provided in an embodiment of the present application;

[0044] Fig.10 A schematic diagram of the structure of a mounting base of a tensioning module in a projection screen provided in an embodiment of the present application;

[0045] Fig.11 A cross-sectional view of a spring pin module in a first state of a projection screen provided by an embodiment of the present application at a first viewing angle;

[0046] Fig.12 A cross-sectional view of a spring pin module in a first state of a projection screen provided by an embodiment of the present application at a second viewing angle;

[0047] Fig.13A cross-sectional view of a pin module in a second state of a projection screen provided by an embodiment of the present application at a first viewing angle;

[0048] Fig.14 A cross-sectional view of a pin module in a second state at a second viewing angle in a projection screen provided by an embodiment of the present application;

[0049] Fig.15 A schematic diagram of a structure in which a display film is installed upright in a projection screen provided in an embodiment of the present application;

[0050] Fig.16 A schematic diagram of another structure of a projection screen provided by an embodiment of the present application showing a film in a normal state;

[0051] Fig.17 A schematic diagram of a structure in which a display film is reversely installed in a projection screen provided in an embodiment of the present application;

[0052] Fig.18 A schematic diagram of another structure in which a display film is reversely installed in a projection screen provided in an embodiment of the present application.

[0053] Description of reference numerals:

[0054] 100-projection screen;

[0055] 110-display diaphragm;

[0056] 111-diaphragm body;

[0057] 112-connecting cloth;

[0058] 120-screen frame;

[0059] 121-sliding groove;

[0060] 122-mounting slot;

[0061] 123-through hole;

[0062] 130- tensioning module;

[0063] 131-mounting seat;

[0064] 1311-groove;

[0065] 132-Pin module;

[0066] 1321-housing;

[0067] 1322-pressing member;

[0068] 13221-clip part;

[0069] 1323-Tensioning piece;

[0070] 13231- telescopic part;

[0071] 13232-Card slot;

[0072] 1324- first elastic member;

[0073] 1325- second elastic member;

[0074] 140-Fixers. DETAILED DESCRIPTION

[0075] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. All other embodiments obtained are within the scope of protection of the present invention. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0076] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean 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, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0078] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0079] At present, laser TV is an ultra-short-throw projection with a short focal length and a small projection. It has high requirements for screen flatness. To ensure high flatness, laser TV screens often use multiple springs to tighten to meet the high flatness requirements. However, the existing installation method has a large number of springs, which makes assembly and installation complicated. The larger the size, the more springs there are, and the assembly is time-consuming and labor-intensive.

[0080] 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, can drive the display film to stretch when the telescopic part of the tensioning member is in the telescopic state, so that the display film is flat, and further makes the projection picture clear and uniform in brightness, which is convenient for users to watch and has good effect. It is also simple to assemble and easier for workers to operate, saving processing costs and improving efficiency.

[0081] 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.

[0082] Figure 1 An exploded view of a projection screen provided in an embodiment of the present application, Figure 2 A schematic diagram of the structure of a display film in a projection screen provided in an embodiment of the present application, Figure 3 for Figure 2 The local enlarged view of point I in the middle, Figure 4 A schematic diagram of the structure of a first viewing angle of a screen frame in a projection screen provided in an embodiment of the present application, Figure 5 A schematic diagram of a second viewing angle of a screen frame in a projection screen provided in an embodiment of the present application, Figure 6 A schematic structural diagram of a third viewing angle of a screen frame in a projection screen provided in an embodiment of the present application.

[0083] like Figures 1 to 6 As shown, the embodiment of the present application provides a projection screen 100, including:

[0084] Display film 110, display film 110 has a projection light receiving surface;

[0085] It can be understood that the front side of the display film 110 is the projection light receiving surface.

[0086] A screen frame 120, which is disposed around the outer periphery of the display film 110;

[0087] It should be noted that the screen frame 120 is generally a frame-type structure, and the screen frame 120 encloses a rectangular or square hollow area, which can be used to place the display film 110, and the screen frame 120 can surround the edge of the display film 110 to provide protection for the display film 110, and the screen frame 120 and the display film 110 are connected and tensioned through a deformable or displaceable connector or connection structure, such as a tensioning module 130.

[0088] In some examples, the screen frame 120 may be a metal member, and its material may include one or more of copper, iron, aluminum, tin, and lead.

[0089] In other examples, the screen frame 120 may be made of plastic.

[0090] It should be noted that the specific material of the screen frame 120 is not excessively limited in the embodiment of the present application.

[0091] Of course, during manufacturing, the screen frame 120 can also be made of steel plates, plastics or synthetic materials while ensuring strength.

[0092] Figure 7 A cross-sectional view of a projection screen provided in an embodiment of the present application, Figure 8 This is a structural schematic diagram of a first viewing angle of a spring pin module in a projection screen provided in an embodiment of the present application. Fig. 9 A schematic structural diagram of a first-perspective view of a spring-pin module in a projection screen provided in an embodiment of the present application.

[0093] like Figures 1 to 9 As shown, the tensioning module 130 is movably arranged on the screen frame 120 and faces the display film 110. The tensioning module 130 includes a tensioning member 1323. The tensioning member 1323 has a telescopic portion 13231. The telescopic portion 13231 faces the display film 110 and is connected to the end of the display film 110. The telescopic portion 13231 is constructed to move relative to the screen frame 120 so that the display film 110 is in a stretched state.

[0094] It should be noted that the display film 110 can usually be composed of a hard layer, a Fresnel structure layer and a projection layer, etc., and has a certain strength and rigidity, and can have a certain verticality in a vertical free hanging state so that the display film 110 looks flat, but because it still has a certain softness, if there is no support or is disturbed by external forces, the display film 110 still cannot meet the flatness requirements required for display. The screen is uneven, which will cause the laser projection image to be deformed, blurred, uneven in brightness, or other degradation problems.

[0095] In order to flatten the display film 110 , in some optional implementations, the display film 110 includes a film body 111 and a connecting fabric 112 that are attached to each other.

[0096] Generally, the diaphragm body 111 is made of a rigid material, and the connecting cloth 112 generally has the characteristics of being inelastic, ultra-thin, dense and high-strength. In this way, when the connecting cloth 112 and the diaphragm body 111 are bonded, an integrated 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.

[0097] Specifically, the connecting cloth 112 can generally be a soft cloth, so that the connecting cloth 112 can better transmit the force when stretched, and has a relatively stable property, and can adapt to a wider range of environments, for example, it can maintain good flatness and reliability in an ambient temperature between -10°C and 40°C.

[0098] In some embodiments, the telescopic portion 13231 and the end of the display film 110 may be connected in a detachable connection manner or a fixed connection manner.

[0099] For example, bolts, buckles or hanging connections are used. Specifically, the embodiments of the present application are not too restrictive here.

[0100] It can be understood that the telescopic portion 13231 can move relative to the screen frame 120. Therefore, when one end of the telescopic portion 13231 is fixed to the edge of the connecting cloth 112 and the other end is connected to the screen frame 120, the connecting cloth 112 can be stretched by movement, forcing the connecting cloth 112 to open to a flat stretched state, thereby displaying that the membrane 110 is in a stretched state, and the display membrane 110 is flat.

[0101] Through the above-mentioned arrangement, that is, through the arrangement of the tensioning module 130, the display film 110 can be stretched when the telescopic portion 13231 of the tensioning member 1323 is in the telescopic state, so that the display film 110 is flattened, and further the projection image is displayed clear and with uniform brightness, which is convenient for users to watch and has a good effect. In addition, the assembly is simpler and easier for workers to operate, which saves processing costs and improves efficiency.

[0102] like Figures 1 to 9 As shown, in some optional embodiments, the tensioning member 1323 is configured to stretch the display film 110 toward the outer edge of the screen frame 120 by its own movement; or,

[0103] The tensioning member 1323 is configured to drive the display film 110 to bypass the outer edge of the screen frame 120 through its own movement, and stretch toward the back side of the screen frame 120 .

[0104] It should be noted that the tensioning member 1323 drives the display film 110 in a stretched state, which can be divided into forward installation and reverse installation. Specifically, the tensioning member 1323 is located on the front side of the display film 110, and can be configured to drive the display film 110 to stretch toward the outer edge of the screen frame 120 at the front side.

[0105] Of course, the tensioning member 1323 is located on the back of the display film 110 and can be configured to drive the display film 110 to bypass the outer edge of the screen frame 120 through its own movement and stretch toward the back side of the screen frame 120 to achieve reverse installation.

[0106] In addition, it should be noted that, no matter it is installed upright or reversely, as long as the display film 110 can be stretched by the tensioning member 1323, the screen is flat. Specifically, the embodiments of the present application do not impose too many restrictions.

[0107] like Figures 1 to 9 As shown, in some optional implementations, the moving direction of the telescopic portion 13231 matches the stretching direction of the display film 110 .

[0108] It should be noted that the moving direction of the telescopic portion 13231 is parallel or nearly parallel to the stretching direction of the display film 110 .

[0109] This can bring two advantages: on the one hand, the overall volume and thickness of the projection screen 100 can be reduced. When the telescopic portion 13231 moves, the moving direction is within the plane where the display film 110 is located, or has a smaller angle with the plane. Therefore, the deformation in the thickness direction of the projection screen 100 is small, which can effectively reduce the thickness of the projection screen 100. On the other hand, when the moving direction of the telescopic portion 13231 is parallel to the stretching direction of the display film 110, it is also easy for the display film 110 to stretch and extend along the plane where it is located.

[0110] like Figures 1 to 9 As shown, in some optional embodiments, the projection screen 100 further includes a fixing member 140, one side of the fixing member 140 is connected to the end of the display film 110, and the other side of the fixing member 140 is connected to the telescopic portion 13231;

[0111] The screen frame 120 has a sliding groove 121, an installation groove 122 and a through hole 123. The sliding groove 121 is used to accommodate the fixing member 140, the installation groove 122 is used to install the tensioning module 130, and the through hole 123 is used to connect the sliding groove 121 and the installation groove 122 so that the telescopic part 13231 extends into the sliding groove 121 through the through hole 123 to drive the fixing member 140 to move in the sliding groove 121.

[0112] It should be noted that the fixing member 140 is provided to improve the connection strength between the tensioning module 130 and the display film 110 .

[0113] It can be understood that the cross-sectional size of the telescopic portion 13231 matches the shape and size of the through hole 123 , and it is sufficient that the telescopic portion 13231 can extend into the through hole 123 .

[0114] Fig.10 A schematic diagram of the structure of a mounting base of a tensioning module in a projection screen provided in an embodiment of the present application, as shown in FIG. Figures 1 to 10 As shown, in some optional embodiments, the tensioning module 130 further includes a mounting seat 131 and a spring pin module 132, the mounting seat 131 has a plurality of grooves 1311, and the plurality of grooves 1311 are spaced apart on the mounting seat 131;

[0115] There are multiple elastic pin modules 132 , and they are configured to be inserted into the grooves 1311 so as to be installed on the mounting seat 131 .

[0116] It should be noted that, since the display film 110 has a large area, a plurality of elastic pin modules 132 are usually required to be stretched together to allow the display film 110 to be effectively unfolded into a flat state.

[0117] In some examples, the elastic pin modules 132 may be spaced apart and arranged at a suitable density, so that on the one hand, a plurality of elastic pin modules 132 can be used to provide sufficient indirect tensile force or driving force to the display film 110, and on the other hand, an appropriate number of elastic pin modules 132 can also avoid installation difficulties caused by too many elastic pin modules 132.

[0118] As an optional arrangement of the elastic pin modules 132, a plurality of elastic pin modules 132 can be arranged at intervals around the display film 110, for example, arranged at equal intervals in symmetrical directions. In this way, the elastic pin modules 132 are all subjected to the pulling force or pushing force of the elastic pin modules 132 in the four directions of up, down, left, and right, so that the display film 110 can be effectively stretched in all directions and kept flat.

[0119] It should be noted that the design of the groove 1311 facilitates the elastic pin module 132 to extend into the groove 1311 and be stuck in the groove 1311, so as to achieve the connection between the elastic pin module 132 and the mounting seat 131.

[0120] Correspondingly, the number of grooves 1311 is consistent with the number of spring pin modules 132. The specific number can be adjusted according to actual conditions, and the embodiments of the present application do not impose too many restrictions on this.

[0121] In some examples, the groove 1311 may be in any shape such as square, oval, trapezoid, etc., and this embodiment does not impose any specific limitation on this.

[0122] Fig.11 A cross-sectional view of a pin module in a first state at a first viewing angle in a projection screen provided by an embodiment of the present application, Fig.12 A cross-sectional view of a pin module in a first state of a projection screen provided by an embodiment of the present application at a second viewing angle, Fig.13 A cross-sectional view of the elastic pin module in the second state of the projection screen provided by an embodiment of the present application at a first viewing angle, Fig.14 A cross-sectional view of a pin module at a second viewing angle in a second state of a projection screen provided in an embodiment of the present application.

[0123] like Figures 1 to 14 As shown, in some optional embodiments, the elastic pin module 132 includes a housing 1321 and a pressing member 1322, and the tensioning member 1323 and the pressing member 1322 are both movably arranged relative to the housing 1321;

[0124] The pressing member 1322 has a clamping portion 13221, and the tensioning member 1323 has a clamping slot 13232. The pressing member 1322 is configured to clamp the clamping portion 13221 and the clamping slot 13232 or disengage from the clamping slot 13232 by pressing itself.

[0125] When the engaging portion 13221 is disengaged from the engaging slot 13232 , the telescopic portion 13231 of the tensioning member 1323 moves relative to the pressing member 1322 to drive the display film 110 to move to a stretched state.

[0126] It should be noted that when the engaging portion 13221 is disengaged from the engaging slot 13232 , it means that the telescopic portion 13231 of the tensioning member 1323 is released from restriction, and then the telescopic portion 13231 of the tensioning member 1323 moves, thereby driving the display film 110 to move to a stretched state.

[0127] In addition, the engaging portion 13221 can be separated from the engaging slot 13232 by pressing the pressing member 1322 , that is, the pressing member 1322 is pressed, and then the engaging portion 13221 on the pressing member 1322 can be separated from the engaging slot 13232 .

[0128] It should be noted that, through this method, the whole process is more convenient and efficiency is improved.

[0129] In addition, the setting of the pressing piece 1322 facilitates the user to operate and improves convenience.

[0130] like Figures 1 to 14 As shown, in some optional embodiments, the cross section of the clamping portion 13221 is stepped, and the clamping portion 13221 includes a connecting column and a clamping block connected to the end of the connecting column, and the radial dimension of the connecting column is smaller than the radial dimension of the clamping block;

[0131] The clamping slot 13232 includes an avoidance zone and a guide zone connected to one side of the avoidance zone, the guide zone extends along the moving direction of the tensioning member 1323, and the radial dimension of the avoidance zone is greater than the width of the guide zone;

[0132] When the radial dimension of the connecting column matches the width of the guide area, the connecting column moves along the extension direction of the guide area; when the radial dimension of the avoidance area matches the radial dimension of the clamping block, the clamping block is clamped in the avoidance area.

[0133] It should be noted that, in some embodiments, the connecting column and the card block are connected by an integral connection method, and in other embodiments, the connecting column and the card block can also be connected by other connection methods. As long as the connection method can fix the connecting column and the card block, the purpose of this embodiment can be achieved. Here, there is no restriction on the connection method between the connecting column and the card block.

[0134] It can be understood that the design that the radial dimension of the connecting column is smaller than the radial dimension of the block allows the block to be connected to the avoidance area. When the block leaves the avoidance area, the connecting column can move along the extension direction of the guide area, and then the telescopic part 13231 of the tensioning member 1323 moves relative to the pressing member 1322 to drive the display film 110 to move to a stretched state.

[0135] like Figures 1 to 14 As shown, in some optional embodiments, the elastic pin module 132 further includes a first elastic member 1324 and a second elastic member 1325, the first elastic member 1324 is located between the inner wall of the shell 1321 and the pressing member 1322, and the second elastic member 1325 is located between the inner wall of the shell 1321 and the tensioning member 1323, when the card block is inserted into the card slot 13232, the first elastic member 1324 and the second elastic member 1325 are both in a compressed state;

[0136] The moving direction of the tensioning member 1323 matches the moving direction of the first elastic member 1324 , and the moving direction of the pressing member 1322 matches the moving direction of the second elastic member 1325 .

[0137] It should be noted that the design of the first elastic member 1324 and the second elastic member 1325 provides elastic force to the pressing member 1322 and the tensioning member 1323 respectively, so that the entire pressing process and the moving process are smoother.

[0138] In some examples, the first elastic member 1324 and the second elastic member 1325 may be springs.

[0139] like Figures 1 to 14 As shown, in some optional embodiments, the display film 110 includes a film body 111 and a connecting cloth 112, the front side of the film body 111 is a projection light receiving surface, the back side of the film body 111 is bonded to the connecting cloth 112, the connecting cloth 112 covers the back side of the film body 111, and extends beyond at least one side edge of the back side of the film body 111.

[0140] It should be noted that the diaphragm body 111 in the projection screen 100 is usually made of hard materials, including multiple optical structure layers, and has a certain degree of hardness and rigidity compared to a soft screen. Therefore, when the diaphragm body 111 is stretched, a relatively flat surface can be formed. In this way, at least part of the front area of ​​the diaphragm body 111 can be used as a light receiving area for projecting images, so that the picture and image are projected on the front of the diaphragm body 111 for display.

[0141] Since the hard material constituting the diaphragm body 111 is usually hard and brittle, if a hole or a groove is directly punched on the hard diaphragm body 111 for fixing, the diaphragm body 111 is likely to crack.

[0142] In order to connect and fix the hard film body 111 , the display film 110 in this embodiment further includes a soft connecting cloth 112 . The connecting cloth 112 can be bonded to the hard film body 111 and connected to other fixing structures, thereby fixing the film body 111 .

[0143] At this time, the connecting cloth 112 and the diaphragm body 111 are bonded to each other, so the stretching degree of the connecting cloth 112 will also affect the curling or unfolding of the diaphragm body 111 .

[0144] In some examples, in order to achieve connection with the diaphragm body 111, the connecting cloth 112 has a sufficient size to at least cover the area on the back side of the diaphragm body 111 opposite to the front light-receiving area. At this time, the back side of the light-receiving area is bonded to the connecting cloth 112. In this way, when the connecting cloth 112 is in a flat and stretched state, the light-receiving area on the diaphragm body 111 for projecting an image will also be stretched, thereby achieving better picture display quality.

[0145] At this time, since the connecting cloth 112 and the diaphragm body 111 are bonded and adhered to each other, when the connecting cloth 112 stretches outward, the diaphragm body 111 is also stretched outward until the diaphragm body 111 stretches to a flat state. At this time, the diaphragm body 111 can ensure good flatness, so that the picture and image projected on the front of the diaphragm body 111 have a better display effect, and avoid the projection picture from being skewed and deformed.

[0146] Fig.15 This is a schematic diagram of a structure in which a display film is installed upright in a projection screen provided in an embodiment of the present application. Fig.16 This is a schematic diagram of another structure of a projection screen provided by an embodiment of the present application, in which a display film is installed upright. Fig.17 A schematic diagram of a structure in which a display film is reversely installed in a projection screen provided in an embodiment of the present application, Fig.18 A schematic diagram of another structure in which a display film is reversely installed in a projection screen provided in an embodiment of the present application.

[0147] like Figures 1 to 18 As shown, it should be noted that the tensioning module 130 drives the display film 110 to be in a stretched state, which can be divided into a normal installation and a reverse installation. Specifically, when the display film 110 is in a normal installation, the tensioning module 130 at this time can act as a thrust, such as Fig.15 As shown, of course, the tensioning module 130 can act as a tensioning force, such as Fig.16 shown.

[0148] Specifically, when the display diaphragm 110 is in reverse installation, the tensioning module 130 can act as a thrust, such as Fig.17 As shown, of course, the tensioning module 130 can act as a tensioning force, such as Fig.18 shown.

[0149] The projection screen provided in 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; a tensioning module, the tensioning module is movably arranged on the screen frame and faces the display film, the tensioning module includes a tensioning member, the tensioning member has a telescopic part, the telescopic part faces the display film and is connected to the end of the display film, the telescopic part is constructed to move relative to the screen frame to put the display film in a stretched state.

[0150] By setting the tensioning module, the display membrane can be stretched when the telescopic part of the tensioning member is in the telescopic state, so that the display membrane is flat, and further the projection image is displayed clear and uniform in brightness, which is convenient for users to watch and has a good effect. In addition, the assembly is simple and easier for workers to operate, which saves processing costs and improves efficiency.

[0151] Embodiment 2

[0152] like Figures 1 to 18 As shown, the embodiment of the present application further provides a projection screen 100, comprising:

[0153] A display film 110, wherein the display film 110 is configured to display a projection image;

[0154] A screen frame 120 , wherein the screen frame 120 is configured to accommodate the display film 110 ;

[0155] The tensioning module 130 is disposed on the screen frame 120 . The tensioning module 130 is connected to the display film 110 , and the tensioning module 130 is configured to stretch the display film 110 by moving itself.

[0156] The projection screen provided by the embodiment of the present application, through the setting of the tensioning module, can drive the display membrane to stretch when the telescopic part of the tensioning member is in the telescopic state, so that the display membrane is flat, and further makes the projected image clear and uniform in brightness, which is convenient for users to watch and has a good effect. It is also simple to assemble and easier for workers to operate, saving processing costs and improving efficiency.

[0157] Embodiment 3

[0158] The embodiment of the present application further provides a projection system, including a projection device and the above-mentioned projection screen 100, wherein the projection device is used to project a projection picture onto the projection screen 100.

[0159] The projection system provided in this embodiment specifically includes a projection device and the projection screen 100 in the aforementioned embodiment. The projection device is used to project a projection picture onto the display film 110 of the projection screen 100 .

[0160] The specific structure, working principle and function of the projection screen 100 have been described in detail in the aforementioned embodiment 1, and will not be repeated here.

[0161] Specifically, in the projection system of this embodiment, the projection device can be any existing projector, 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.

[0162] By setting the tensioning module, the display membrane can be stretched when the telescopic part of the tensioning member is in the telescopic state, so that the display membrane is flat, and further the projection image is displayed clear and uniform in brightness, which is convenient for users to watch and has a good effect. In addition, the assembly is simple and easier for workers to operate, which saves processing costs and improves efficiency.

[0163] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 understood as limiting the present invention.

[0164] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0165] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, 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, 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; A tensioning module is movably arranged on the screen frame and faces the display film. The tensioning module includes a tensioning member, and the tensioning member has a telescopic portion. The telescopic portion faces the display film and is connected to the end of the display film. The telescopic portion is constructed to move relative to the screen frame so that the display film is in a stretched state.

2. The projection screen according to claim 1, characterized in that: The tensioning member is configured to drive the display film to stretch toward the outer edge of the screen frame by its own movement; or, The tensioning member is configured to drive the display film to bypass the outer edge of the screen frame and stretch toward the back side of the screen frame through its own movement.

3. The projection screen according to claim 2, characterized in that: The moving direction of the telescopic portion matches the stretching direction of the display film.

4. The projection screen according to any one of claims 1 to 3, characterized in that: The projection screen further comprises a fixing member, one side of which is connected to the end of the display film, and the other side of which is connected to the telescopic part; The screen frame has a sliding groove, a mounting groove and a through hole, the sliding groove is used to accommodate the fixing member, the mounting groove is used to install the tensioning module, and the through hole is used to connect the sliding groove and the mounting groove so that the telescopic part extends into the sliding groove through the through hole to drive the fixing member to move in the sliding groove.

5. The projection screen according to claim 4, characterized in that: The tensioning module further comprises a mounting seat and a spring pin module, wherein the mounting seat has a plurality of grooves, and the plurality of grooves are arranged on the mounting seat at intervals; There are multiple spring pin modules, which are configured to be inserted into the grooves so as to be installed on the mounting seat.

6. The projection screen according to claim 5, characterized in that: The elastic pin module comprises a shell and a pressing piece, and the tensioning piece and the pressing piece are both movably arranged relative to the shell; The pressing member has a clamping portion, the tensioning member has a clamping slot, and the pressing member is configured to press itself to make the clamping portion and the clamping slot clamped or disengaged from the clamping slot; When the engaging portion is disengaged from the engaging slot, the telescopic portion of the tensioning member moves relative to the pressing member to drive the display film to move to a stretched state.

7. The projection screen according to claim 6, characterized in that The cross section of the clamping portion is stepped, and the clamping portion comprises a connecting column and a clamping block connected to the end of the connecting column, and the radial dimension of the connecting column is smaller than the radial dimension of the clamping block; The clamping slot includes an avoidance zone and a guide zone connected to one side of the avoidance zone, the guide zone extends along the moving direction of the tensioning member, and the radial dimension of the avoidance zone is greater than the width of the guide zone; When the radial dimension of the connecting column matches the width of the guide area, the connecting column moves along the extension direction of the guide area; when the radial dimension of the avoidance area matches the radial dimension of the block, the block is engaged with the avoidance area.

8. The projection screen according to claim 7, characterized in that: The elastic pin module further comprises a first elastic member and a second elastic member, wherein the first elastic member is located between the inner wall of the housing and the pressing member, and the second elastic member is located between the inner wall of the housing and the tensioning member, and when the clamping block is clamped into the clamping slot, the first elastic member and the second elastic member are both in a compressed state; The moving direction of the tensioning member matches the moving direction of the first elastic member, and the moving direction of the pressing member matches the moving direction of the second elastic member.

9. A projection screen, 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; A tensioning module is provided on the screen frame, the tensioning module is connected to the display film, and the tensioning module is configured to drive the display film to be stretched by its own movement.

10. A projection system, 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