Projection screen and projection system

Abstract

The utility model 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 mode, the screen frame is provided with a moving groove and a clamping part, and the clamping part is located in a groove opening of the moving groove; the tensioning unit is movably arranged on the screen frame, the tensioning unit comprises a first tensioning piece, the first tensioning piece is connected with the end of the display membrane, the first tensioning piece is configured to be screwed into the moving groove and move relative to the screen frame so that the display membrane can be in a stretched state, and when the first tensioning piece is located in the moving groove, the first tensioning piece can move relative to the screen frame. And the first tensioning piece is clamped on the clamping part. According to the invention, the display diaphragm is flat, the projection screen is ultrathin, and the purpose of fast assembly of the projection screen can be achieved.

Description

Technical Field

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

[0002] With the continuous development of society, people's pursuits are also constantly changing. For laser TVs, the portability and simplicity of the screen have become one of the pursuit indicators. Therefore, the laser screen needs to be more portable, simpler, and faster to achieve stable coordinated development with the market.

[0003] Currently, there are high requirements for the flatness of the display film. To ensure high flatness, most projection screens use a method of being tightened by multiple springs to meet the requirement of high flatness.

[0004] However, for existing projection screens, there are many types of materials and vertical beams, and the assembly and installation are complex. The larger the size, the more springs are required, and the assembly is time-consuming and laborious. Considering the installation space of the springs, the overall thickness is relatively large. Summary of the Utility Model

[0005] The main purpose of this application is to provide a projection screen and a projection system, which can make the display film flat, achieve an ultra-thin projection screen, and at the same time achieve the purpose of rapid assembly of the projection screen.

[0006] To achieve the above object, in a first aspect, this application provides a projection screen, including:

[0007] A display film, the display film having a projection light-receiving surface;

[0008] A screen frame, the screen frame surrounding the outer periphery of the display film, the screen frame having a moving groove and a clamping portion, the clamping portion being located at the notch of the moving groove;

[0009] A tensioning unit, the tensioning unit being movably arranged on the screen frame, the tensioning unit including a first tensioning member, the first tensioning member connecting to the end of the display film, the first tensioning member being configured to be screwed into the moving groove and move relative to the screen frame so that the display film is in a stretched state. Wherein, when the first tensioning member is located in the moving groove, the first tensioning member is clamped to the clamping portion.

[0010] The beneficial effect of this application is that through the design of the first tensioning member, the moving groove and the clamping portion, during the process of screwing the first tensioning member into the moving groove, the display film can be flattened, so that the display film is flat, and further the projection image is clear and has uniform brightness when displayed, which is convenient for users to watch, and the effect is good; in addition, the installation space of the tensioning unit is reduced, thereby reducing the overall thickness of the projection screen. While achieving an ultra-thin projection screen, the purpose of rapid assembly of the projection screen can be achieved.

[0011] On the basis of the above technical solutions, the present application can also be improved as follows.

[0012] In some alternative embodiments, the moving groove extends along the length direction of the screen frame, and the first tensioning member is screwed into the moving groove along the first direction and is fixed in the moving groove through the clamping portion.

[0013] In some alternative embodiments, the first tensioning member is an arc-shaped support rod;

[0014] The moving groove is an arc-shaped groove, and the shape of the first tensioning member matches the shape of the moving groove.

[0015] In some alternative embodiments, the first tensioning member has a first arc surface and a second arc surface, the first arc surface and the second arc surface are concentrically arranged, and the first arc surface faces the clamping portion;

[0016] The clamping portion extends towards the center of the moving groove, the clamping portion has an arc-shaped clamping surface, and the first tensioning member rotates around the clamping portion so that the first arc surface is clamped on the arc-shaped clamping surface.

[0017] In some alternative embodiments, the tensioning unit further includes a second tensioning member, and the second tensioning member is located at the end of the screen frame;

[0018] The second tensioning member has a deformation portion, and the deformation portion is configured to abut against the second arc surface so that the first tensioning member moves relative to the moving groove.

[0019] In some alternative embodiments, the second tensioning member includes an elastic member and an abutting block, and the deformation portion is arranged on the elastic member;

[0020] One end of the elastic member is arranged in the moving groove, the other end of the elastic member is connected to the abutting block, and the abutting block pushes the second arc surface to rotate along the first direction under the elastic force of the elastic member.

[0021] In some alternative embodiments, an arc-shaped limiting groove is formed on the first tensioning member, the arc-shaped limiting groove is located on the second arc surface, and the notch of the arc-shaped limiting groove faces the abutting block;

[0022] The abutting block has an arc-shaped abutting surface. Along the first direction, the extending length of the arc-shaped limiting groove is greater than the extending length of the arc-shaped abutting surface, so that the arc-shaped abutting surface can abut against different positions of the bottom of the arc-shaped limiting groove to adjust the position of the first tensioning member relative to the screen frame.

[0023] In some alternative embodiments, the screen frame includes a first frame and a second frame. There are two first frames and two second frames, and the two first frames and the second frames are alternately arranged to surround the outer periphery of the display diaphragm. Among them, the length of the second frame is greater than the length of the first frame, and the first frame is foldable;

[0024] The screen frame further includes a fixing rod. When the first border is converted from the folded state to the unfolded state, the fixing rod passes through the folding part of the first border to fix the first border.

[0025] In a second aspect, the present application further provides a projection screen, including:

[0026] A display diaphragm;

[0027] A screen frame that surrounds the outer periphery of the display diaphragm, and the screen frame has a moving groove;

[0028] A tensioning member that connects to the end of the display diaphragm. The tensioning member is configured to be screwed into the moving groove and move relative to the screen frame so that the display diaphragm is in a stretched state.

[0029] In a third aspect, the present application further provides a projection system, including a projection device and the above-mentioned projection screen. The projection device is used to project a projection image onto the projection screen.

[0030] The projection screen and the projection system provided by the present application. The projection system includes a projection device and a projection screen. The projection device is used to project a projection image onto the projection screen. Among them, the projection screen includes a display diaphragm that has a projection light-receiving surface; a screen frame that surrounds the outer periphery of the display diaphragm, and the screen frame has a moving groove and a clamping portion located at the notch of the moving groove; a tensioning unit that is movably arranged on the screen frame. The tensioning unit includes a first tensioning member that connects to the end of the display diaphragm. The first tensioning member is configured to be screwed into the moving groove and move relative to the screen frame so that the display diaphragm is in a stretched state. Among them, when the first tensioning member is located in the moving groove, the first tensioning member is clamped to the clamping portion.

[0031] Through the design of the first tensioning member, the moving groove, and the clamping portion, when the first tensioning member is screwed into the moving groove, the display diaphragm can be flattened, 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 watch and has a good effect. In addition, the installation space of the tensioning unit is reduced, thereby reducing the overall thickness of the projection screen. While achieving the ultra-thin projection screen, the purpose of rapid assembly of the projection screen can be achieved. Description of the Drawings

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1Exploded view of the projection screen provided by the embodiment of the present application;

[0034] Figure 2 Exploded view of the display diaphragm in the projection screen provided by the embodiment of the present application;

[0035] Figure 3 For Figure 2 Partial enlarged view at I in;

[0036] Figure 4 Exploded view of the screen frame in the projection screen provided by the embodiment of the present application;

[0037] Figure 5 Cross-sectional view of the projection screen provided by the embodiment of the present application;

[0038] Figure 6 Structural schematic diagram of the first state of the screen frame in the projection screen provided by the embodiment of the present application;

[0039] Figure 7 For Figure 6 Partial enlarged view at II in;

[0040] Figure 8 For Figure 6 Partial enlarged view at III in;

[0041] Figure 9 Structural schematic diagram of the second border in the projection screen provided by the embodiment of the present application;

[0042] Figure 10 For Figure 9 Cross-sectional view taken along A-A in;

[0043] Figure 11 For Figure 9 Cross-sectional view taken along B-B in;

[0044] Figure 12 Structural schematic diagram of the second state of the screen frame in the projection screen provided by the embodiment of the present application;

[0045] Figure 13 For Figure 12 Partial enlarged view at IV in;

[0046] Figure 14 Structural schematic diagram of the first border of the projection screen provided by the embodiment of the present application from the first perspective;

[0047] Figure 15 Structural schematic diagram of the first border of the projection screen provided by the embodiment of the present application from the second perspective;

[0048] Figure 16 Structural schematic diagram of the first tensioning member in the projection screen provided by the embodiment of the present application;

[0049] Figure 17 Cross-sectional view of the first tensioning member in the projection screen provided by the embodiment of the present application;

[0050] Figure 18 Schematic structural diagram of the first state of the tensioning unit in the projection screen provided by the embodiment of the present application;

[0051] Figure 19 Schematic structural diagram of the second state of the tensioning unit in the projection screen provided by the embodiment of the present application;

[0052] Figure 20 Schematic structural diagram of the third state of the tensioning unit in the projection screen provided by the embodiment of the present application.

[0053] Explanation of reference numerals:

[0054] 100 - Projection screen; 110 - Display film; 111 - Film body; 112 - Connecting cloth; 1121 - Cloth pocket;

[0055] 120 - Screen frame; 121 - First side frame; 1211 - Long slot; 122 - Second side frame; 1221 - Moving slot; 1222 - Clamping portion; 123 - Vertical beam; 124 - Mortise column; 125 - Fixed rod;

[0056] 130 - Tensioning unit; 131 - First tensioning member; 1311 - First arc surface; 1312 - Second arc surface; 1313 - Arc limiting groove; 132 - Second tensioning member; 1321 - Elastic member; 1322 - Abutting block. Detailed implementation manners

[0057] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without making creative efforts belong to the scope of protection of the present application. All other embodiments obtained belong to the scope of protection of the present application. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0058] In this application, unless otherwise clearly stipulated or defined, terms such as "installed", "connected", "joined", "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 communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0059] In this application, unless otherwise clearly stipulated or defined, 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 indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean 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", "beneath" and "underneath" 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.

[0060] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. 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 this application. 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 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.

[0061] Currently, there are relatively high requirements for the flatness of the display diaphragm. To ensure a high flatness, most projection screens adopt the method of being tightened by multiple springs to meet the requirements of higher flatness. However, for existing projection screens, there are many types of materials and vertical beams, and the assembly and installation are complex. The larger the size, the more springs are required, and the assembly is time-consuming and laborious. Considering the installation space of the springs, the overall thickness is relatively large.

[0062] To overcome the defects in the prior art, the projection screen and projection system provided in this application, through the design of the first tensioning member, the moving groove and the clamping portion, during the process of screwing the first tensioning member into the moving groove, the display film can be flattened, so that the display film becomes flat. Further, when the projection screen is displayed, the picture is clear and the brightness is uniform, which is convenient for users to watch and has a good effect. In addition, the installation space of the tensioning unit is reduced, thereby reducing the overall thickness of the projection screen. While achieving the ultra-thin projection screen, the purpose of rapid assembly of the projection screen can be achieved.

[0063] The content of this application will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can understand the content of this application more clearly and in detail.

[0064] Figure 1 It is an exploded view of the projection screen provided by an embodiment of this application. Figure 2 It is an exploded view of the display film in the projection screen provided by an embodiment of this application. Figure 3 is Figure 2 the partial enlarged view at I in Figure 4 It is an exploded view of the screen frame in the projection screen provided by an embodiment of this application. Figure 5 It is a sectional view of the projection screen provided by an embodiment of this application.

[0065] As Figures 1 to 5 shown, an embodiment of this application provides a projection screen 100, including:

[0066] A display film 110, the display film 110 has a projection light-receiving surface.

[0067] A screen frame 120, the screen frame 120 is arranged around the outer periphery of the display film 110, the screen frame 120 has a moving groove 1221 and a clamping portion 1222, and the clamping portion 1222 is located at the notch of the moving groove 1221.

[0068] A tensioning unit 130, the tensioning unit 130 is movably arranged on the screen frame 120, the tensioning unit 130 includes a first tensioning member 131, the first tensioning member 131 is connected to the end of the display film 110, and the first tensioning member 131 is configured to be screwed into the moving groove 1221 and move relative to the screen frame 120 so that the display film 110 is in a stretched state. Wherein, when the first tensioning member 131 is located in the moving groove 1221, the first tensioning member 131 is clamped to the clamping portion 1222.

[0069] Through the above settings, that is, through the design of the first tension member 131, the moving groove 1221, and the clamping portion 1222, when the first tension member 131 is screwed into the moving groove 1221, the display diaphragm 110 can be flattened, so that the display diaphragm 110 is flattened. 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, the installation space of the tensioning unit 130 is reduced, thereby reducing the overall thickness of the projection screen 100. While realizing the ultra-thinness of the projection screen 100, the rapid assembly of the projection screen 100 is achieved.

[0070] It should be noted that the following will specifically describe each structure.

[0071] [Display diaphragm 110]

[0072] It can be understood that the front surface of the display diaphragm 110 is the light-receiving surface for projection.

[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 image 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.

[0075] It should be noted that the diaphragm body 111 in the projection screen 100 is usually made of a hard material and includes multiple optical structure layers. Compared with a soft screen, it has a certain degree of brittleness and rigidity. Therefore, when the diaphragm body 111 is stretched, a relatively flat surface can be formed. In this way, at least a part of the front surface of the diaphragm body 111 can be used as the light-receiving area for the projected image, so that the picture and image can be projected on the front surface of the diaphragm body 111 for display.

[0076] Since the hard material forming the diaphragm body 111 usually has brittleness, if holes or grooves are directly drilled or cut on the hard diaphragm body 111 for fixation, it is easy to cause the diaphragm body 111 to crack.

[0077] In order to connect and fix the hard diaphragm body 111, the display diaphragm 110 in this embodiment further includes a soft connecting cloth 112. The connecting cloth 112 can be bonded to the hard diaphragm body 111 and connected to other fixing structures, thereby completing the fixation of the diaphragm body 111.

[0078] Specifically, the connecting cloth 112 generally has characteristics such as inelasticity, ultra-thinness, density, and high strength. When the connecting cloth 112 is bonded to the diaphragm body 111, an integral structure can be formed between the two, facilitating the transmission of force, enabling the diaphragm body 111 to be stretched following the deformation of the connecting cloth 112. In this way, the connecting cloth 112 can transmit the acting force well when being stretched, and has relatively stable properties, being able to 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.

[0079] At this time, the connecting cloth 112 and the diaphragm body 111 are adhesively bonded to each other, so the degree of extension of the connecting cloth 112 will also affect the curling or unfolding of the diaphragm body 111.

[0080] 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 of the diaphragm body 111 that is opposite to the light-receiving area on the front. At this time, the back of the light-receiving area is adhesively bonded to the connecting cloth 112. In this way, when the connecting cloth 112 is in a flat and extended state, the light-receiving area on the diaphragm body 111 for projecting images will also be stretched, thus achieving better picture display quality.

[0081] At this time, since the connecting cloth 112 and the diaphragm body 111 are adhesively bonded and joined together, when the connecting cloth 112 extends outward, it will also form an outward stretch on the diaphragm body 111 until the diaphragm body 111 extends to a flat state. At this time, the diaphragm body 111 can ensure good flatness, enabling the pictures and images projected on the front of the diaphragm body 111 to have better display effects and avoiding skewness and deformation of the projected pictures.

[0082] [Screen frame 120]

[0083] It should be noted that the moving groove 1221 is provided at the end of the screen frame 120 and extends along the length direction, facilitating the screwing-in of the first tensioning member 131. The clamping portion 1222 is provided in a matching manner to fix the first tensioning member 131 and prevent the first tensioning member 131 from falling out of the moving groove 1221.

[0084] It should be noted that the screen frame 120 is generally of 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 connection and tensioning between the screen frame 120 and the display diaphragm 110 are achieved through the deformable or displaceable tensioning unit 130.

[0085] 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.

[0086] In other examples, the screen frame 120 can be made of plastic.

[0087] It should be noted that the specific material of the screen frame 120 is not limited too much in the embodiments of the present application.

[0088] Of course, during production and manufacturing, on the premise of ensuring strength, the screen frame 120 can also be made of steel plate, plastic or composite material.

[0089] In some examples, the screen frame 120 further includes a plurality of vertical beams 123, and the vertical beams 123 are located in the middle of the display diaphragm 110 to improve the support strength of the screen frame 120.

[0090] Figure 6 It is a schematic structural diagram of the first state of the screen frame in the projection screen provided by the embodiment of the present application. Figure 7 is Figure 6 the partial enlarged view at II in Figure 8 is Figure 6 the partial enlarged view at III in Figure 9 It is a schematic structural diagram of the second border in the projection screen provided by the embodiment of the present application. Figure 10 is Figure 9 the sectional view taken along A-A in Figure 11 is Figure 9 the sectional view taken along B-B in Figure 12 It is a schematic structural diagram of the second state of the screen frame in the projection screen provided by the embodiment of the present application. Figure 13 is Figure 12 the partial enlarged view at IV in Figure 14 It is a schematic structural diagram of the first border of the projection screen from the first perspective provided by the embodiment of the present application. Figure 15 It is a schematic structural diagram of the first border of the projection screen from the second perspective provided by the embodiment of the present application.

[0091] As Figures 1 to 15 shown, in some alternative embodiments, the screen frame 120 includes a first border 121 and a second border 122. There are two of each of the first border 121 and the second border 122, and the two first borders 121 and the second borders 122 are alternately arranged to surround the outer periphery of the display diaphragm 110. Among them, the length of the second border 122 is greater than the length of the first border 121, and the first border 121 can be foldably arranged;

[0092] The screen frame 120 further includes a fixing rod 125. When the first side frame 121 is converted from a folded state to an unfolded state, the fixing rod 125 passes through the folding part of the first side frame 121 to fix the first side frame 121.

[0093] To facilitate the entry of the projection screen 100 into the household and its rapid assembly, the screen frame 120 can be composed of multiple first side frames 121 and second side frames 122 assembled together. Generally, considering the convenience of installation, it can be composed of multiple first side frames 121 and second side frames 122. However, in practice, it can be determined according to the size, and there is no excessive limitation here.

[0094] It should be noted that the second side frame 122 can be a long side frame, and the first side frame 121 can be a short side frame. The first side frame 121, the second side frame 122, another first side frame 121, and another second side frame 122 are connected in sequence to form the inner frame of the screen frame 120.

[0095] In some examples, the screen frame 120 further includes an outer frame. The outer frame surrounds the four sides of the inner frame, and the material used for the outer frame can be the same as that of the inner frame.

[0096] In some embodiments, a moving groove 1221 and a clamping portion 1222 are provided on the second side frame 122. Generally, the second side frame 122 is located on the upper and lower sides, and the first side frame 121 is located on the left and right sides. That is to say, the tensioning unit 130 is movably arranged on the second side frame 122.

[0097] Among them, as Figures 6 to 8 shown, the first side frame 121 can be folded, and its middle part is connected by a hinge or a rotating shaft to achieve folding in half. After it is tightened, the fixing rod 125 is used to fix it into a straight frame, and it is assembled with the upper and lower second side frames 122 into a return frame, that is, the inner frame. When the strength is insufficient, the vertical beam 123 can be used to strengthen it. In addition, the folded first side frame 121 is provided with a long notch 1211, and this long notch 1211 provides a fixing position for the left and right arc-shaped support rods.

[0098] In some examples, the screen frame 120 further includes multiple mortise posts 124, as Figure 7 shown, 4 mortise posts 124 are fixed into a whole square frame by connecting the ends.

[0099] It should be noted that the assembly process is as follows: First, the first frame 121 is in a folded state, then the second frame 122 is assembled, and then the second tensioning member 132 is installed on the second frame 122; then, the two first frames 121 and the two second frames 122 are connected end to end through 4 dowel posts 124; then, the first tensioning member 131 is respectively passed through the cloth pockets 1121 around the connecting cloth 112, and the first frame 121 is folded inward by a certain angle, so that the distance L2 between the outer edges of the upper and lower second frames 122 is reduced to be less than the distance L1 between the upper and lower edges of the display film 110, so as to facilitate the first tensioning member 131 to slide into the slots of the upper and lower second frames 122 along the trajectory of the arc-shaped moving groove 1221 on the back of the upper and lower second frames 122; then, the left and right first frames 121 folded by a certain angle are unfolded, and the fixing rod 125 is assembled to increase the distance between the outer edges of the upper and lower first frames 121, so as to tension the upper and lower edges of the display film 110. If the strength is not enough, the middle support vertical beam 123 is installed. Finally, the left and right arc-shaped support rods are slid into the long slots 1211 along the notch positions on the back of the left and right first frames 121, and finally the outer frame is installed. The outer frame can be fixed by means of clamping, screw fastening, magnetic attraction, gluing, magic tape, snap fasteners, etc.

[0100] [Tensioning unit 130]

[0101] Figure 16 It is a schematic structural diagram of the first tensioning member in the projection screen provided by the embodiment of the present application. Figure 17 It is a sectional view of the first tensioning member in the projection screen provided by the embodiment of the present application. Figure 18 It is a schematic structural diagram of the first state of the tensioning unit in the projection screen provided by the embodiment of the present application. Figure 19 It is a schematic structural diagram of the second state of the tensioning unit in the projection screen provided by the embodiment of the present application. Figure 20 It is a schematic structural diagram of the third state of the tensioning unit in the projection screen provided by the embodiment of the present application.

[0102] As Figures 1 to 20 shown, it should be noted that since the area of the display film 110 is large, the first tensioning member 131 directly passes through the cloth pocket 1121, and the whole first tensioning member 131 moves, so that the display film 110 is effectively unfolded into a flat state.

[0103] In some alternative embodiments, the moving groove 1221 extends along the length direction of the screen frame 120, the first tensioning member 131 is screwed into the moving groove 1221 along the first direction, and is fixed in the moving groove 1221 through the clamping portion 1222.

[0104] It should be noted that the extended length of the moving groove 1221 matches the extended length of the first tensioning member 131. This means that after the first tensioning member 131 passes through the cloth pocket 1121, it is entirely accommodated within the moving groove 1221. Due to the structural design of the moving groove 1221, when the first tensioning member 131 is screwed into the moving groove 1221, it can drive the display diaphragm 110 to move, thereby flattening the display diaphragm 110.

[0105] As Figure 18 and Figure 19 shown, wherein the first direction can be the direction in which the first tensioning member 131 rotates counterclockwise.

[0106] The function of the clamping portion 1222 is to prevent the first tensioning member 131 from falling out of the moving groove 1221, so that the first tensioning member 131 always remains within the moving groove 1221.

[0107] In some alternative embodiments, the first tensioning member 131 is an arc-shaped support rod;

[0108] The moving groove 1221 is an arc-shaped groove, and the shape of the first tensioning member 131 matches the shape of the moving groove 1221.

[0109] It should be noted that the matching shapes of the first tensioning member 131 and the moving groove 1221 enable the first tensioning member 131 to be screwed into the moving groove 1221 along the shape of the moving groove 1221, pulling the display diaphragm 110 to move; in addition, the compactness of the entire structure can be improved.

[0110] In some embodiments, the first tensioning member 131 can be a 1 / 4 hollow circular support rod, and the moving groove 1221 can be a 1 / 4 circular groove.

[0111] In some alternative embodiments, the first tensioning member 131 has a first arc surface 1311 and a second arc surface 1312. The first arc surface 1311 and the second arc surface 1312 are concentrically arranged, and the first arc surface 1311 faces the clamping portion 1222;

[0112] The clamping portion 1222 extends towards the center of the moving groove 1221. The clamping portion 1222 has an arc-shaped clamping surface, and the first tensioning member 131 rotates around the clamping portion 1222 so that the first arc surface 1311 is clamped to the arc-shaped clamping surface.

[0113] It should be noted that the first arc surface 1311 is an inner arc surface, and its radian matches the radian of the arc-shaped clamping surface. When the first tensioning member 131 rotates around the clamping portion 1222 along the first direction, the first arc surface 1311 closely adheres to the arc-shaped clamping surface, and as the first tensioning member 131 rotates, it rotates along the first direction relative to the arc-shaped clamping surface.

[0114] In some embodiments, the cross-section of the clamping portion 1222 can be a circular structure, and its radius dimension matches the dimension of the first arc surface 1311, so that the first tensioning member 131 can closely adhere to and rotate around the clamping portion 1222.

[0115] In some embodiments, the clamping portion 1222 and the screen frame 120 are connected by an integral connection method. In some other embodiments, the clamping portion 1222 and the screen frame 120 can also be connected by other connection methods. As long as the connection method can fixedly connect the clamping portion 1222 and the screen frame 120, the purpose of this embodiment can be achieved. Here, the connection method between the clamping portion 1222 and the screen frame 120 is not limited.

[0116] As Figures 18 to 20 shown, in some alternative embodiments, the tensioning unit 130 further includes a second tensioning member 132, and the second tensioning member 132 is located at the end of the screen frame 120;

[0117] The second tensioning member 132 has a deformation portion, and the deformation portion is configured to abut against the second arc surface 1312 so that the first tensioning member 131 moves relative to the moving groove 1221.

[0118] It should be noted that the setting of the second tensioning member 132 is to be able to adapt to the situation where the display film 110 expands and contracts under the influence of the environment. By using the deformation portion on the second tensioning member 132, the second arc surface 1312 can be pushed, that is, the first tensioning member 131 is pushed to move relative to the moving groove 1221, and the display film 110 can be further flattened, so that the display film 110 can be kept flat in real time.

[0119] In some embodiments, the second tensioning member 132 is arranged on the screen frame 120 and can be fixed in a detachable manner, which is convenient for disassembly and maintenance later.

[0120] Among them, the deformation portion extends into the moving groove 1221 and has a certain amount of deformation. Through this amount of deformation, it acts on the first tensioning member 131, and then the position of the first tensioning member 131 in the moving groove 1221 is adjusted. Further, when the display film 110 expands and contracts, the display film 110 can always be kept in a tensioned state, so that the projection picture is clear and the brightness is uniform when displayed, which is convenient for users to watch and has a good effect.

[0121] In some alternative embodiments, the second tensioning member 132 includes an elastic member 1321 and an abutting block 1322, and the deformation portion is arranged on the elastic member 1321;

[0122] One end of the elastic member 1321 is disposed in the moving groove 1221, and the other end of the elastic member 1321 is connected to the abutting block 1322. The abutting block 1322 pushes the second arc surface 1312 to rotate in the first direction under the elastic force of the elastic member 1321.

[0123] It should be noted that the elastic force of the elastic member 1321 can directly act on the abutting block 1322, and the abutting block 1322 can act on the first tensioning member 131 to push or pull the first tensioning member 131 to move, further adjusting the position of the first tensioning member 131 in the moving groove 1221.

[0124] In some embodiments, one end of the elastic member 1321 can be disposed in the moving groove 1221 in a detachable manner. In other embodiments, one end of the elastic member 1321 can be disposed on the screen frame 120 in a detachable manner. The detachable structure can be a snap structure, a threaded structure, etc., and is not limited here too much.

[0125] In addition, the setting of the abutting block 1322 facilitates the more stable transmission of the elastic force on the elastic member 1321 to the first tensioning member 131.

[0126] In some embodiments, the elastic member 1321 is a compression spring.

[0127] The resultant force F1 of the inner and outer side supports received by the first tensioning member 131 acts on the center of gravity position, while the tension F3 of the connecting cloth 112 on the first tensioning member 131 is along the moving direction of the connecting cloth 112 and is an eccentric force, which will provide a counterclockwise eccentric torque to the first tensioning member 131, causing the first tensioning member 131 to rotate counterclockwise. However, the first tensioning member 131 is restricted by the engaging portion 1222, so the first tensioning member 131 is restricted from falling off. In addition, the elastic member 1321 will give the first tensioning member 131 an eccentric thrust F2, making it only able to twist counterclockwise. When the display film 110 contracts, the force received by the elastic member 1321 increases, the elastic member 1321 compresses, and the first tensioning member 131 flips clockwise, but will be restricted by the engaging portion 1222 to maintain a tensioned state, ensuring the flatness of the display film 110; when the display film 110 expands, the elastic member 1321 will apply a pressure to the first tensioning member 131, causing it to rotate counterclockwise, thereby tensioning the display film 110 and ensuring the flatness of the display film 110.

[0128] In some alternative embodiments, an arc-shaped limiting groove 1313 is formed on the first tensioning member 131. The arc-shaped limiting groove 1313 is located on the second arc surface 1312, and the notch of the arc-shaped limiting groove 1313 faces the abutting block 1322;

[0129] The abutting block 1322 has an arc-shaped abutting surface. Along the first direction, the extending length of the arc-shaped limiting groove 1313 is greater than that of the arc-shaped abutting surface, so that the arc-shaped abutting surface can abut against different positions on the bottom of the arc-shaped limiting groove 1313 to adjust the position of the first tensioning member 131 relative to the screen frame 120.

[0130] It should be noted that such a setting, on the one hand, facilitates adjusting the position of the first tensioning member 131 relative to the screen frame 120, so as to always keep the display diaphragm 110 in a flattened state; on the other hand, it is convenient for installation to match the tolerance problems that occur in actual production.

[0131] Specifically, the radian of the arc-shaped abutting surface matches the radian of the second arc surface 1312 and the bottom of the arc-shaped limiting groove 1313. Furthermore, the arc-shaped abutting surface can closely adhere to the bottom of the arc-shaped limiting groove 1313, and the compactness of the whole structure is relatively high.

[0132] The projection screen provided by the embodiment of the present application includes a display diaphragm, the display diaphragm has a projection light-receiving surface; a screen frame, the screen frame surrounds the outer periphery of the display diaphragm, the screen frame has a moving groove and a clamping portion, and the clamping portion is located at the notch of the moving groove; a tensioning unit, the tensioning unit is movably arranged on the screen frame, the tensioning unit includes a first tensioning member, the first tensioning member is connected to the end of the display diaphragm, and the first tensioning member is configured to be screwed into the moving groove and move relative to the screen frame so that the display diaphragm is in a stretched state, wherein when the first tensioning member is located in the moving groove, the first tensioning member is clamped to the clamping portion.

[0133] Through the design of the first tensioning member, the moving groove and the clamping portion, when the first tensioning member is screwed into the moving groove, the display diaphragm can be flattened, so that the display diaphragm is flattened, and further the projection picture is clear and the brightness is uniform when displayed, which is convenient for users to watch and has a good effect; in addition, the installation space of the tensioning unit is reduced, thereby reducing the overall thickness of the projection screen. While achieving the ultra-thin projection screen, the purpose of rapid assembly of the projection screen can be achieved.

[0134] In addition, as Figures 1 to 20 shown, the embodiment of the present application also provides a projection screen 100, including:

[0135] A display diaphragm 110;

[0136] A screen frame 120, the screen frame 120 surrounds the outer periphery of the display diaphragm 110, and the screen frame 120 has a moving groove 1221;

[0137] A tensioning member, the tensioning member is connected to the end of the display diaphragm 110, and the tensioning member is configured to be screwed into the moving groove 1221 and move relative to the screen frame 120 so that the display diaphragm 110 is in a stretched state.

[0138] The projection screen provided by the embodiment of the present application, through the design of the first tensioning member, the moving groove and the clamping portion, enables the first tensioning member to flatten the display film during the process of screwing into the moving groove, so that the display film is flattened, further making the projection picture clear and uniform in brightness when displayed, facilitating the user to watch, and having a good effect; in addition, the installation space of the tensioning unit is reduced, thereby reducing the overall thickness of the projection screen. While achieving the ultra-thin projection screen, the purpose of rapid assembly of the projection screen can be achieved.

[0139] In addition, the 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 picture onto the projection screen 100.

[0140] The projection system provided by this embodiment specifically includes a projection device and the projection screen 100 in the first embodiment above, and the projection device is used to project a projection picture onto the display film 110 of the projection screen 100.

[0141] Among them, the specific structure, working principle and function of the projection screen 100 have been described in detail in the first embodiment above, and will not be elaborated here.

[0142] 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 picture onto the display film 110 of the projection screen 100, so that the display film 110 can display the projection picture for people to watch.

[0143] Through the design of the first tensioning member, the moving groove and the clamping portion, enables the first tensioning member to flatten the display film during the process of screwing into the moving groove, so that the display film is flattened, further making the projection picture clear and uniform in brightness when displayed, facilitating the user to watch, and having a good effect; in addition, the installation space of the tensioning unit is reduced, thereby reducing the overall thickness of the projection screen. While achieving the ultra-thin projection screen, the purpose of rapid assembly of the projection screen can be achieved.

[0144] In the description of the present application, 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 application 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 application.

[0145] In addition, 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 this application, "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 this application and are not intended to limit them; although this application 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; and 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 this application.

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 outer periphery of the display film, the screen frame has a moving groove and a clamping part, and the clamping part is located at the notch of the moving groove; A tensioning unit is movably arranged on the screen frame, and includes a first tensioning member, wherein the first tensioning member is connected to the end of the display film, and the first tensioning member is configured to be screwed into the movable groove and move relative to the screen frame to put the display film in a stretched state, wherein when the first tensioning member is located in the movable groove, the first tensioning member is clamped in the clamping portion.

2. The projection screen according to claim 1, characterized in that: The moving groove extends along the length direction of the screen frame, and the first tensioning member is screwed into the moving groove along a first direction and is fixed in the moving groove through the clamping portion.

3. The projection screen according to claim 1, characterized in that: The first tensioning member is an arc-shaped support rod; The movable groove is an arc-shaped groove, and the shape of the first tensioning member matches the shape of the movable groove.

4. The projection screen according to any one of claims 1 to 3, characterized in that: The first tensioning member has a first arcuate surface and a second arcuate surface, the first arcuate surface and the second arcuate surface are concentrically arranged, and the first arcuate surface faces the clamping portion; The clamping portion extends toward the center of the moving groove, and the clamping portion has an arc-shaped clamping surface. The first tensioning member rotates around the clamping portion so that the first arc-shaped surface is clamped to the arc-shaped clamping surface.

5. The projection screen according to claim 4, characterized in that: The tensioning unit further comprises a second tensioning member, wherein the second tensioning member is located at an end of the screen frame; The second tensioning member has a deformation portion, and the deformation portion is configured to abut against the second arc surface so that the first tensioning member moves relative to the moving groove.

6. The projection screen according to claim 5, characterized in that: The second tensioning member includes an elastic member and an abutment block, and the deformation portion is arranged on the elastic member; One end of the elastic member is disposed in the moving groove, and the other end of the elastic member is connected to the abutment block. The abutment block pushes the second arc surface to rotate along the first direction under the elastic force of the elastic member.

7. The projection screen according to claim 6, characterized in that An arc-shaped limiting groove is provided on the first tensioning member, the arc-shaped limiting groove is located on the second arc-shaped surface, and the notch of the arc-shaped limiting groove faces the abutment block; The abutment block has an arc-shaped abutment surface. Along the first direction, the extension length of the arc-shaped limiting groove is greater than the extension length of the arc-shaped abutment surface, so that the arc-shaped abutment surface can abut against different positions of the bottom of the arc-shaped limiting groove to adjust the position of the first tensioning member relative to the screen frame.

8. The projection screen according to any one of claims 1 to 3, characterized in that: The screen frame includes a first frame and a second frame, the first frame and the second frame are both two, and the two first frames and the two second frames are alternately arranged to surround the periphery of the display film, wherein the length of the second frame is greater than the length of the first frame, and the first frame can be folded; The screen frame further comprises a fixing rod, and when the first frame is transformed from a folded state to an unfolded state, the fixing rod passes through a folded portion of the first frame to fix the first frame.

9. A projection screen, characterized in that: include: Display diaphragm; A screen frame, the screen frame is arranged around the periphery of the display film, and the screen frame has a moving groove; A tensioning member is connected to the end of the display film, and the tensioning member is configured to be screwed into the moving groove and move relative to the screen frame to put the display film in a stretched state.

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