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 comprises at least two first borders and at least two second borders, the first borders and the second borders are alternately arranged and surround the periphery of the display membrane, and the length of the second borders is larger than that of the first borders; the adjusting unit comprises an adjusting piece and an adjusting hole, the adjusting hole is formed in one of the first frame and the second frame, the adjusting hole is formed in the second frame located at the bottom of the screen frame, the second frame located at the bottom of the screen frame is hung at the end of the display membrane, and the adjusting piece penetrates through the adjusting hole and is connected with the adjusting piece. The adjusting piece is connected with the other one of the first frame and the second frame, and a movable gap is formed between the adjusting piece and the adjusting hole. The tensioning device is good in tensioning effect, simple in structure and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of projection, in particular to a projection screen and a projection system. Background Art

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

[0003] At present, the laser screen includes a screen frame and a display membrane. The frame screen is mainly assembled by assembling a flat frame, which is assembled with the frame through structures such as springs and push-pull parts, and they cooperate with each other to flatten the display membrane.

[0004] However, the tensioning structure of the display diaphragm in the existing laser screen is relatively complicated. Utility Model Content

[0005] The main purpose of the utility model is to provide a projection screen and a projection system, which have good tensioning effect, simple structure and low cost.

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

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

[0008] A screen frame, the screen frame comprises at least two first frames and at least two second frames, the first frames and the second frames are alternately arranged and arranged around the periphery of the display film, wherein the length of the second frames is greater than the length of the first frames;

[0009] The adjusting unit includes an adjusting member and an adjusting hole. The adjusting hole is opened on one of the first frame and the second frame. The adjusting hole is opened on the second frame located at the bottom of the screen frame. The second frame located at the bottom of the screen frame is suspended at the end of the display film. The adjusting member passes through the adjusting hole and is connected to the other of the first frame and the second frame. There is a movable gap between the adjusting member and the adjusting hole.

[0010] The beneficial effects of the utility model are as follows: through the design of the adjusting member and the adjusting hole, the display diaphragm can drive the second frame to move in the length direction of the first frame under the action of the gravity of the second frame, and then stretch the display diaphragm in the length direction of the first frame, so that the display diaphragm is flat, and further the projection image is displayed clear and with uniform brightness, which is convenient for users to watch and has good effect; in addition, the display diaphragm is tensioned in real time by gravity, replacing the traditional mode of spring or screw tensioning. This solution has a simple structure, is easy to install, requires less materials, and has a low product cost.

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

[0012] In some optional embodiments, a radial dimension of the adjustment hole along the length direction of the first frame is greater than a radial dimension along the length direction of the second frame.

[0013] In some optional implementations, the second frame located at the bottom of the screen frame is movably connected to the first frame located at the bottom of the screen frame.

[0014] In some optional embodiments, at least two pressure strips are further included, and the pressure strips extend along the length direction of the second frame;

[0015] The pressure strip is arranged at the edge of the display film, at least two pressure strips are respectively clamped on two opposite sides of the display film, and the pressure strips are connected to the second frame.

[0016] In some optional embodiments, the second frame has a mounting groove, and the size of the groove opening of the mounting groove is smaller than the size of the groove bottom of the mounting groove;

[0017] The pressure strip extends into the installation groove and is clamped with the groove wall of the installation groove.

[0018] In some optional embodiments, a bonding member is provided on one side of the pressure strip facing the display film, and the pressure strip is bonded to two opposite sides of the display film through the bonding member; and / or,

[0019] The device also comprises fasteners, through which the pressure strip is fixed to two opposite sides of the display film.

[0020] In some optional embodiments, the end of the adjusting member has an external thread section, the first frame has a threaded hole, the threaded hole has an internal thread section, and the external thread section and the internal thread section cooperate with each other to thread the adjusting member into connection with the first frame.

[0021] In some optional embodiments, the screen frame further includes a vertical beam, which extends along the length direction of the first frame, and the upper and lower ends of the vertical beam are respectively connected to the two second frames.

[0022] In a second aspect, the utility model further provides a projection screen, comprising:

[0023] A display film, wherein the display film has a projection light receiving surface;

[0024] A screen frame, the screen frame includes a first frame and a second frame, and the first frame and the second frame are arranged around the periphery of the display film;

[0025] The adjusting unit is configured to adjust the position of the second frame relative to the first frame so that the second frame moves along the length direction of the first frame.

[0026] In a third aspect, the utility model 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.

[0027] The utility model provides a projection screen and a projection system. The projection system comprises a projection device and a projection screen. The projection device is used for projecting a projection picture onto the projection screen. The projection screen comprises a display film, and the display film has a projection light-receiving surface. A screen frame comprises at least two first frames and at least two second frames. The first frames and the second frames are alternately arranged and surrounded by the outer periphery of the display film, wherein the length of the second frames is greater than that of the first frames. An adjustment unit comprises an adjustment member and an adjustment hole. The adjustment hole is arranged on one of the first frames and the second frames. The adjustment hole is arranged on the second frame located at the bottom of the screen frame. The second frame located at the bottom of the screen frame is suspended at the end of the display film. The adjustment member passes through the adjustment hole and is connected to the other of the first frame and the second frame. There is a movable gap between the adjustment member and the adjustment hole.

[0028] Through the design of the adjustment member and the adjustment hole, the display film can drive the second frame to move in the length direction of the first frame under the action of the gravity of the second frame, and then stretch the display film in the length direction of the first frame, so that the display film is flat, and further makes the projection image clear and uniform in brightness, which is convenient for users to watch and has a good effect; in addition, the display film is tensioned in real time by gravity, replacing the traditional mode of spring or screw tensioning. This solution has a simple structure, is easy to install, requires less materials, and has a low product cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 A schematic diagram of the structure of a projection screen provided in an embodiment of the present application;

[0031] Figure 2 An exploded view of a projection screen provided in an embodiment of the present application;

[0032] Figure 3 An exploded view of the assembly of a display film and a second frame of a projection screen provided in an embodiment of the present application;

[0033] Figure 4 for Figure 3 A partial enlarged view of point I in the middle;

[0034] Figure 5 An exploded view of another projection screen provided in an embodiment of the present application;

[0035] Figure 6 An exploded view of the assembly of a display film and a second frame of another projection screen provided in an embodiment of the present application;

[0036] Figure 7 for Figure 6 A partial enlarged view of position II in the middle;

[0037] Figure 8 A cross-sectional view of the first part of the first frame and the second frame of the projection screen provided in an embodiment of the present application;

[0038] Fig. 9 for Figure 8 A partial enlarged view of the part III in the middle;

[0039] Fig.10 A cross-sectional view of the second part of the first frame and the second frame of the projection screen provided in an embodiment of the present application;

[0040] Fig.11 for Fig.10 A partial enlarged view of the IV in the middle;

[0041] Fig.12 An assembly cross-sectional view of a pressure strip and a second frame in a projection screen provided in an embodiment of the present application;

[0042] Fig.13 A schematic diagram of the assembly structure of the pressure strip and the second frame in the projection screen provided in an embodiment of the present application;

[0043] Fig.14 A schematic diagram of the structure of another projection screen provided in an embodiment of the present application;

[0044] Fig.15 A cross-sectional view of the first part of the assembly of the vertical beam and the second frame of the projection screen provided in an embodiment of the present application;

[0045] Fig.16 A cross-sectional view of the second portion of the assembly of the vertical beam and the second frame in the projection screen provided in an embodiment of the present application.

[0046] Description of reference numerals:

[0047] 100-projection screen;

[0048] 110-display diaphragm;

[0049] 120-screen frame;

[0050] 121-first border;

[0051] 122-second border;

[0052] 1221-installation slot;

[0053] 123-vertical beam;

[0054] 130-regulating unit;

[0055] 131-adjusting member;

[0056] 1311-external thread section;

[0057] 132-adjustment hole;

[0058] 140-layering;

[0059] 150-fasteners;

[0060] 160-Connectors. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. All other embodiments obtained are within the scope of protection of the utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0062] 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.

[0063] In the present utility model, 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.

[0064] 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 utility model. 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.

[0065] At present, laser screens include screen frames and display membranes. The frame screen is mainly assembled by assembling a flat frame, and assembled with the frame through springs, push-pull parts and other structures, and cooperate with each other to flatten the display membrane. However, the tensioning structure of the display membrane in the existing laser screen is relatively complicated.

[0066] In order to overcome the defects in the prior art, the projection screen and projection system provided by the utility model, through the design of the adjusting member and the adjusting hole, enable the display film to drive the second frame to move in the length direction of the first frame under the action of the adjusting member, and then stretch the display film in the length direction of the first frame, so that the display film 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; in addition, the display film is tensioned in real time by gravity, instead of the traditional mode of spring or screw tensioning. This solution has a simple structure, is easy to install, requires less materials, and has a low product cost.

[0067] The content of the utility model will be described in detail below with reference to the accompanying drawings so that those skilled in the art can understand the content of the utility model more clearly and in detail.

[0068] Figure 1 A schematic diagram of the structure of a projection screen provided in an embodiment of the present application, Figure 2 An exploded view of a projection screen provided in an embodiment of the present application, Figure 3An exploded view of the assembly of a display film and a second frame of a projection screen provided in an embodiment of the present application, Figure 4 for Figure 3 The local enlarged view of point I in the middle, Figure 5 An exploded view of another projection screen provided in an embodiment of the present application, Figure 6 An exploded view of the assembly of a display film and a second frame of another projection screen provided in an embodiment of the present application, Figure 7 for Figure 6 A partial enlarged view of II in the middle. Figure 8 This is a cross-sectional view of the first part of the first frame and the second frame of the projection screen provided in an embodiment of the present application. Fig. 9 for Figure 8 A partial enlarged view of point III in the middle.

[0069] like Figures 1 to 9 As shown, the embodiment of the present application provides a projection screen 100, including:

[0070] Display film 110, display film 110 has a projection light receiving surface;

[0071] It can be understood that the front side of the display film 110 is the projection light receiving surface.

[0072] The screen frame 120 includes a first frame 121 and a second frame 122. There are at least two first frames 121 and second frames 122, and the two first frames 121 and second frames 122 are alternately arranged and arranged around the periphery of the display film 110. The length of the second frame 122 is greater than that of the first frame 121.

[0073] 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 by a deformable or displaceable tensioning module.

[0074] 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.

[0075] In other examples, the screen frame 120 may be made of plastic.

[0076] It should be noted that the specific material of the screen frame 120 is not excessively limited in the embodiment of the present application.

[0077] Of course, during manufacturing, the screen frame 120 can also be made of steel plates, plastics or synthetic materials while ensuring strength.

[0078] Among them, the screen frame 120 can be composed of multiple first frames 121 and second frames 122 assembled together. Generally, considering the convenience of installation, it can be composed of multiple first frames 121 and second frames 122 assembled together. However, in practice, it can be determined based on the size, and there are no excessive restrictions here.

[0079] It should be noted that the second frame 122 may be a long frame, the first frame 121 may be a short frame, and the first frame 121 , the second frame 122 , another first frame 121 and another second frame 122 are connected in sequence to form a screen frame 120 .

[0080] The adjustment unit 130 includes an adjustment member 131 and an adjustment hole 132. The adjustment hole 132 is opened on one of the first frame 121 and the second frame 122. The adjustment hole 132 is opened on the second frame 122 located at the bottom of the screen frame 120. The second frame 122 located at the bottom of the screen frame 120 is suspended at the end of the display film 110. The adjustment member 131 passes through the adjustment hole 132 and is connected to the other of the first frame 121 and the second frame 122. There is a movable gap between the adjustment member 131 and the adjustment hole 132.

[0081] It should be noted that one end of the adjusting member 131 extends into the adjusting hole 132 and is then connected to the first frame 121, so that the first frame 121 is connected to the second frame 122. Since the adjusting member 131 moves in the adjusting hole 132, it means that the adjusting member 131 can be located at different positions in the adjusting hole 132, and then the second frame 122 can also be located at different positions of the first frame 121, that is, the second frame 122 can be adjusted in the length direction of the first frame 121, and then the display film 110 is tensioned in the length direction of the first frame 121.

[0082] Through the above-mentioned arrangement, that is, through the design of the adjusting member 131 and the adjusting hole 132, the display film 110 can drive the second frame 122 to move in the length direction of the first frame 121 under the action of the gravity of the second frame 122, and then stretch the display film 110 in the length direction of the first frame 121, so that the display film 110 is flat, and further makes the projection image clear and uniform in brightness, which is convenient for users to watch and has a good effect; in addition, the display film 110 is tensioned in real time by gravity, instead of the traditional mode of spring or screw tensioning. This solution has a simple structure, is easy to install, requires less materials, and has a low product cost.

[0083] like Figure 8 and Fig. 9 As shown, in some optional embodiments, the radial dimension of the adjustment hole 132 along the length direction of the first frame 121 is greater than the radial dimension along the length direction of the second frame 122 .

[0084] It should be noted that such a configuration satisfies that the second frame 122 can be adjusted in the length direction of the first frame 121 , thereby tensioning the display film 110 in the length direction of the first frame 121 .

[0085] Specifically, the length of the adjustment hole 132 can be adjusted according to actual conditions and is not restricted too much here.

[0086] like Figure 8 and Fig. 9 As shown, in some optional implementations, the second frame 122 located at the bottom of the screen frame 120 and the first frame 121 located at the bottom of the screen frame 120 are movably connected.

[0087] It should be noted that such a configuration not only satisfies the requirement that the second frame 122 can be adjusted in the length direction of the first frame 121 , but also enables the display film 110 to be tensioned in real time by gravity, resulting in a better tensioning effect.

[0088] Fig.10 A cross-sectional view of the second part of the first frame and the second frame of the projection screen provided in an embodiment of the present application, Fig.11 for Fig.10 A partial enlarged view of point IV in the middle.

[0089] like Fig.10 and Fig.11 As shown, in some embodiments, the second frame 122 located at the upper end of the screen frame 120 is connected and fixed to the first frame 121 through a connecting member 160 .

[0090] In some embodiments, the connector 160 is a screw.

[0091] Fig.12 This is an assembly cross-sectional view of a pressure strip and a second frame in a projection screen provided in an embodiment of the present application. Fig.13 A schematic diagram of the assembly structure of the pressure strip and the second frame in the projection screen provided in an embodiment of the present application.

[0092] like Figures 3 to 7 ,as well as Fig.12 and Fig.13 As shown, in some optional embodiments, at least two pressure strips 140 are further included, and the pressure strips 140 extend along the length direction of the second frame 122;

[0093] The pressure strip 140 is disposed at the edge of the display film 110 . At least two pressure strips 140 are respectively sandwiched between two opposite sides of the display film 110 , and the pressure strips 140 are connected to the second frame 122 .

[0094] It should be noted that the length direction of the pressure strip 140 is consistent with the length direction of the second frame 122 , so that the display film 110 is subjected to a more uniform force in the length direction of the second frame 122 .

[0095] Specifically, the pressure strip 140 is arranged at the upper end or the lower end of the display film 110 , at least two pressure strips 140 are arranged at the upper end of the display film 110 on the opposite front and back sides, and at least two more pressure strips 140 are arranged at the upper end of the display film 110 on the opposite front and back sides.

[0096] At least two pressure strips 140 are arranged on the display film 110, and the pressure strips 140 and the display film 110 are integrated. The whole is installed on the second frame 122. By adjusting the different positions of the adjustment member 131 in the adjustment hole 132, the position of the second frame 122 is adjusted, and the display film 110 is stretched in the length direction of the first frame 121, so that the display film 110 is flattened, and the projection picture is further displayed clear and the brightness is uniform.

[0097] like Fig.12 As shown, in some optional embodiments, the second frame 122 has a mounting groove 1221, and the size of the groove opening of the mounting groove 1221 is smaller than the size of the groove bottom of the mounting groove 1221;

[0098] The pressure strip 140 extends into the installation groove 1221 and is engaged with the groove wall of the installation groove 1221 .

[0099] It should be noted that the design of the mounting groove 1221, on the one hand, facilitates the installation of the pressure strip 140 and satisfies the connection between the pressure strip 140 and the second frame 122; on the other hand, the pressure strip 140 is installed in the mounting groove 1221. Since the slot size of the mounting groove 1221 is smaller than the slot bottom size of the mounting groove 1221, the pressure strip 140 can be stuck in the mounting groove 1221, thereby ensuring the stability of the installation of the pressure strip 140. When the second frame 122 moves, the tension or gravity is transmitted to the pressure strip 140, and the pressure strip 140 transmits it to the display film 110, thereby finally realizing the flatness of the display film 110, which is convenient for users to watch and has a good effect.

[0100] Specifically, the mounting groove 1221 extends along the length direction of the second frame 122, and the pressure strip 140 is installed in the mounting groove 1221 along the length direction of the mounting groove 1221, and the pressure strip 140 is fixed in the connection direction between the groove bottom of the mounting groove 1221 and the groove opening of the mounting groove 1221, wherein the display film 110 connected to the pressure strip 140 extends out from the groove opening of the mounting groove 1221.

[0101] like Fig.12 and Fig.13 As shown, in some optional embodiments, a bonding member is provided on one side of the pressure strip 140 facing the display film 110, and at least two pressure strips 140 are bonded to two opposite sides of the display film 110 through the bonding member; and / or,

[0102] The display film 110 further includes a fastener 150 , through which at least two pressing strips 140 are fixed to two opposite sides of the display film 110 .

[0103] It should be noted that the pressure strip 140 and the display film 110 may be fixed by bonding with an adhesive, may be fixed by a fastener 150 , or may be fixed by both an adhesive and a fastener 150 .

[0104] The function of the adhesive is to make it easier for the top and bottom ends of the display film 110 to bear uniform force when subjected to force. The display film 110 is clamped between the two pressure strips 140 by screws, which can make the display film 110 have a better bonding effect and bear force more evenly.

[0105] Of course, if the strength of the bonding solution of the pressure strip 140 by the bonding member is insufficient, it can be fixed again by the fastener 150 on this basis to improve the strength of the connection between the pressure strip 140 and the display film 110.

[0106] It should be noted that, in the embodiment of the present application, considering the cost of the fastener 150 , the fastener 150 may be a screw.

[0107] Correspondingly, both the pressure strip 140 and the display film 110 are provided with notches, one of which may be a threaded hole. The fastener 150 may pass through the two threaded holes and may be tightened to fix the pressure strip 140 and the display film 110 .

[0108] Of course, when the holding strip 140 and the display film 110 need to be separated and folded, it is only necessary to loosen the fasteners 150 and then take out the fasteners 150 in sequence.

[0109] Of course, in another embodiment, threaded holes may be provided on both the pressure strip 140 and the display film 110 , and the threaded connector 160 may pass through the respective threaded holes in sequence to connect the pressure strip 140 and the display film 110 .

[0110] In some optional embodiments, the end of the adjusting member 131 has an external thread section 1311 , the first frame 121 has a threaded hole, the threaded hole has an internal thread section, and the external thread section 1311 cooperates with the internal thread section to threadably connect the adjusting member 131 to the first frame 121 .

[0111] It should be noted that the adjusting member 131 and the first frame 121 are fixed by threaded connection, which can ensure the connection strength and reduce the cost at the same time.

[0112] In addition, part of the adjusting member 131 has an external thread section 1311 , that is, the connection between the adjusting member 131 and the threaded hole on the first frame 121 has an external thread section 1311 .

[0113] Fig.14 A schematic diagram of the structure of another projection screen provided in an embodiment of the present application, Fig.15 This is a cross-sectional view of the first part of the assembly of the vertical beam and the second frame of the projection screen provided in the embodiment of the present application, Fig.16 A cross-sectional view of the second portion of the assembly of the vertical beam and the second frame in the projection screen provided in an embodiment of the present application.

[0114] like Figures 14 to 16 As shown, in some optional embodiments, the screen frame 120 further includes a vertical beam 123 , which extends along the length direction of the first frame 121 , and the upper and lower ends of the vertical beam 123 are respectively connected to the two second frames 122 .

[0115] It should be noted that the vertical beams 123 are provided to improve the strength of the screen frame 120 .

[0116] In some embodiments, the vertical beam 123 is located in the middle of the screen frame 120 .

[0117] In addition, it should be noted that, in order to improve the strength of the entire screen frame 120 , there are multiple vertical beams 123 along the length direction of the second frame 122 , and the specific number can be adjusted according to actual conditions.

[0118] It should be noted that the first end of the vertical beam 123 is connected to the second frame 122 at the top of the screen frame 120 by means of a fastening member 160, such as a screw; the second end of the vertical beam 123 is connected to the second frame 122 at the bottom of the screen frame 120 by means of an adjustment member 131, and the specific connection method can be referred to above.

[0119] Such a configuration not only adjusts the relative position of the second frame 122 to the first frame 121 but also adjusts the position of the second frame 122 relative to the vertical beam 123 when the second frame 122 moves downward, so that the second frame 122 is more stable as a whole.

[0120] 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 includes at least two first frames and at least two second frames, the first frames and the second frames are alternately arranged and surrounded by the outer periphery of the display film, wherein the length of the second frames is greater than the length of the first frames; an adjustment unit, the adjustment unit includes an adjustment member and an adjustment hole, the adjustment hole is opened on one of the first frame and the second frame, the adjustment hole is opened on the second frame located at the bottom of the screen frame, the second frame located at the bottom of the screen frame is suspended at the end of the display film, the adjustment member passes through the adjustment hole, and is connected to the other of the first frame and the second frame, and there is a movable gap between the adjustment member and the adjustment hole.

[0121] Through the design of the adjustment member and the adjustment hole, the display film can drive the second frame to move in the length direction of the first frame under the action of the gravity of the second frame, and then stretch the display film in the length direction of the first frame, so that the display film is flat, and further makes the projection image clear and uniform in brightness, which is convenient for users to watch and has a good effect; in addition, the display film is tensioned in real time by gravity, replacing the traditional mode of spring or screw tensioning. This solution has a simple structure, is easy to install, requires less materials, and has a low product cost.

[0122] In addition, if Figures 1 to 16 As shown, the embodiment of the present application further provides a projection screen 100, comprising:

[0123] Display film 110, display film 110 has a projection light receiving surface;

[0124] A screen frame 120 , the screen frame 120 includes a first frame 121 and a second frame 122 , and the first frame 121 and the second frame 122 are arranged around the outer periphery of the display film 110 ;

[0125] The adjusting unit 130 is configured to adjust the position of the second frame 122 relative to the first frame 121 so that the second frame 122 moves along the length direction of the first frame 121 .

[0126] The projection screen provided in the embodiment of the present application, through the design of the adjustment member and the adjustment hole, allows the display film to drive the second frame to move in the length direction of the first frame under the action of the gravity of the second frame, and then stretch the display film in the length direction of the first frame, so that the display film 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; in addition, the display film is tensioned in real time by gravity, instead of the traditional mode of spring or screw tensioning. This solution has a simple structure, is easy to install, requires less materials, and has a low product cost.

[0127] In addition, an 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 .

[0128] 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.

[0129] In order to achieve flatness of the display film 110 , in some optional implementations, the display film 110 includes a film body and a synthetic cloth that are bonded to each other.

[0130] Generally, the diaphragm body is made of a rigid material, and the synthetic cloth generally has the characteristics of being inelastic, ultra-thin, dense and high-strength. In this way, when the synthetic cloth and the diaphragm body are bonded, an integrated structure can be formed between the two, thereby facilitating the transmission of force and allowing the diaphragm body to stretch as the synthetic cloth deforms.

[0131] Specifically, the synthetic fabric can generally be a soft fabric, which can transmit the force better 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.

[0132] The projection system provided in this embodiment specifically includes a projection device and the projection screen 100 in the aforementioned first embodiment. The projection device is used to project a projection picture onto the display film 110 of the projection screen 100 .

[0133] 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.

[0134] 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.

[0135] Through the design of the adjustment member and the adjustment hole, the display film can drive the second frame to move in the length direction of the first frame under the action of the gravity of the second frame, and then stretch the display film in the length direction of the first frame, so that the display film is flat, and further makes the projection image clear and uniform in brightness, which is convenient for users to watch and has a good effect; in addition, the display film is tensioned in real time by gravity, replacing the traditional mode of spring or screw tensioning. This solution has a simple structure, is easy to install, requires less materials, and has a low product cost.

[0136] In the description of the present invention, it should 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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 a limitation on the present invention.

[0137] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot 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 utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0138] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A projection screen, It is characterized in that include: A display film, wherein the display film has a projection light receiving surface; A screen frame, the screen frame comprising at least two first frames and at least two second frames, the first frames and the second frames are alternately arranged and arranged around the periphery of the display film, wherein the length of the second frame is greater than the length of the first frame; An adjustment unit, the adjustment unit comprising an adjustment member and an adjustment hole, the adjustment hole being opened on one of the first frame and the second frame, the adjustment hole being opened on the second frame located at the bottom of the screen frame, the second frame located at the bottom of the screen frame being suspended at the end of the display film, the adjustment member passing through the adjustment hole and being connected to the other of the first frame and the second frame, and a movable gap being provided between the adjustment member and the adjustment hole.

2. The projection screen according to claim 1, It is characterized in that The radial dimension of the adjustment hole along the length direction of the first frame is greater than the radial dimension of the adjustment hole along the length direction of the second frame.

3. The projection screen according to claim 1, It is characterized in that The second frame located at the bottom of the screen frame is movably connected to the first frame located at the bottom of the screen frame.

4. The projection screen according to any one of claims 1 to 3, It is characterized in that It also includes at least two pressure strips, and the pressure strips extend along the length direction of the second frame; The pressure strip is arranged at the edge of the display film, at least two pressure strips are respectively clamped on two opposite sides of the display film, and the pressure strip is connected to the second frame.

5. The projection screen according to claim 4, It is characterized in that The second frame has a mounting groove, and the size of the groove opening of the mounting groove is smaller than the size of the groove bottom of the mounting groove; The pressure strip extends into the installation groove and is clamped with the groove wall of the installation groove.

6. The projection screen according to claim 4, It is characterized in that A bonding member is provided on one side of the pressure strip facing the display film, and the pressure strip is bonded to two opposite sides of the display film through the bonding member; and / or, It also includes fasteners, and the pressure strip is fixed to two opposite sides of the display film through the fasteners.

7. The projection screen according to any one of claims 1 to 3, It is characterized in that The end of the adjusting member has an external thread section, the first frame has a threaded hole, the threaded hole has an internal thread section, and the external thread section and the internal thread section cooperate with each other so that the adjusting member is threadedly connected to the first frame.

8. The projection screen according to any one of claims 1 to 3, It is characterized in that The screen frame further includes a vertical beam, which extends along the length direction of the first frame, and the upper and lower ends of the vertical beam are respectively connected to the two second frames.

9. A projection screen, It is characterized in that include: A display film, wherein the display film has a projection light receiving surface; A screen frame, the screen frame comprising a first frame and a second frame, the first frame and the second frame being arranged around the periphery of the display film; An adjusting unit, wherein the adjusting unit is configured to adjust a position of the second frame relative to the first frame so that the second frame moves along a length direction of the first frame.

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

Images