Projection screen and projection system

Abstract

The invention provides a projection screen and a projection system, and the projection screen comprises a display diaphragm which is provided with a projection light-receiving surface; the support unit comprises a support body and a roller, the roller is rotationally arranged on the support body, and at least part of the display film is arranged on the periphery of the roller in a rolled mode; the guide unit is movably arranged on the support body, the guide unit comprises a guide piece, and the guide piece is configured to move relative to the roller when the display membrane moves so as to abut against the wall face of the display membrane. The display film can be prevented from shaking in the moving process, and the watching effect of a user is improved.

Description

Technical Field

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

[0002] With the continuous development of society, people's pursuits are also changing. Projection display systems are increasingly used in people's work and life. The laser projection device emits a beam of light to the projection screen, and the projection screen receives the beam to realize the display of the picture.

[0003] Currently, projection screens typically consist of a display film, a reel, and a lifting unit. One side of the display film is connected to the reel, and the other side is connected to the lifting unit. The reel controls the display film, which can be retracted and extended by the lifting unit. The display film has a light-receiving surface for projection.

[0004] However, when the display diaphragm in the projection screen is raised and lowered, after the display diaphragm is raised and lowered to a certain position, the display diaphragm begins to shake, thereby affecting the middle area, seriously affecting the user's viewing experience. Summary of the Invention

[0005] The main purpose of the present invention is to provide a projection screen and a projection system to prevent the display film from shaking during movement, thereby improving the viewing experience of users.

[0006] To achieve the above-mentioned object, in a first aspect, the present invention provides a projection screen comprising: a display film having a projection light-receiving surface;

[0007] The bracket unit includes a bracket body and a roller, the roller is rotatably arranged on the bracket body, and at least a portion of the display film is wound around the outer periphery of the roller;

[0008] The guide unit is movably arranged on the bracket body and includes a guide member. The guide member is configured to move relative to the roller when the display film moves so as to abut against the wall surface of the display film.

[0009] The beneficial effect of the present invention is that: through the setting of the guide member, the guide member can move relative to the roller during the rising or falling process of the display film, thereby matching the variable distance between the display film and the roller during the movement process. The variable distance is also the distance moved by the guide member, which means that the guide member is always in contact with the display film during the movement of the display film, thereby ensuring that the display film is prevented from shaking left and right during the movement, thereby improving the user's viewing effect.

[0010] On the basis of the above technical solution, the present invention can also be improved as follows.

[0011] In some optional embodiments, the guide member is rotatably arranged around its own axis, and the axis of the guide member is consistent with the axis of the roller.

[0012] In some optional embodiments, the guide member is movable relative to the roller in a second direction, wherein the second direction forms an angle with the moving direction of the display film, and forms an angle with the projection light receiving surface.

[0013] In some optional embodiments, the guide unit further includes an elastic member, a fixed end of the elastic member is connected to the bracket body, and a free end of the elastic member is connected to the guide member.

[0014] In some optional embodiments, the bracket body has a slide rail, and the guide member is configured to move within the slide rail;

[0015] The slide rail is arranged along the length direction of the bracket body, and an angle is formed between the length direction of the guide member and the length direction of the slide rail.

[0016] In some optional embodiments, there are two slide rails, which are spaced apart along the height direction of the bracket body to form a sliding space, and the guide member is configured to move in the sliding space;

[0017] An isolation block is provided on the bracket body, and the isolation block has a sliding surface for the guide member to slide. The isolation block is extended along the length direction of the slide rail, and the guide member has a first abutting portion and a second abutting portion. The first abutting portion and the second abutting portion both protrude from the outer periphery of the guide member, and the first abutting portion and the second abutting portion are spaced apart. The first abutting portion abuts against the first side wall of the isolation block, and the second abutting portion abuts against the second side wall of the isolation block.

[0018] In some optional embodiments, there is at least one isolation block, and the at least one isolation block includes a first isolation block and a second isolation block, and the first isolation block and the second isolation block are spaced apart.

[0019] The first abutting portion abuts against the side wall of the first isolation block, and the second abutting portion abuts against the side wall of the second isolation block.

[0020] In some optional embodiments, the guide unit further includes a moving member, a bearing, and a sleeve, wherein the moving member is a support shaft; the elastic member is connected between the moving member and the bracket body;

[0021] The first end of the moving part is connected to the inner ring of the bearing, and the guide part is connected to the outer ring of the bearing so that the guide part rotates relative to the moving part. The shaft sleeve is sleeved on the second end of the moving part and connected to the bracket body.

[0022] In some optional embodiments, the guide member extends along the length direction of the roller, and the length of the guide member matches the length of the roller; or,

[0023] There are two guide members, which are respectively located at two opposite ends of the drum.

[0024] In a second aspect, the present invention further provides a projection screen, comprising:

[0025] A display film, the display film having a projection light receiving surface;

[0026] a drum, wherein at least a portion of the display film is wound around the outer periphery of the drum;

[0027] The guide unit is configured to move relative to the roller when the display film moves, so as to abut against the wall surface of the display film.

[0028] In a third aspect, the present invention further provides a projection system, comprising a projection device and the above-mentioned projection screen, wherein the projection device is used to project a projection image onto the projection screen.

[0029] The present invention provides a projection screen and a projection system, wherein the projection system includes a projection device and a projection screen, wherein the projection device is used to project a projection image onto the projection screen; wherein the projection screen includes: a display film having a projection light-receiving surface; a bracket unit, wherein the bracket unit includes a bracket body and a roller, wherein the roller is rotatably disposed on the bracket body, and at least a portion of the display film is rolled up on the outer circumference of the roller; and a guide unit, wherein the guide unit is movably disposed on the bracket body, wherein the guide unit includes a guide member, wherein the guide member is configured to move relative to the roller when the display film moves, so as to abut against the wall surface of the display film.

[0030] Through the setting of the guide member, the guide member can move relative to the roller during the rising or falling process of the display film, thereby matching the variable distance between the display film and the roller during the movement process. The variable distance is also the distance moved by the guide member, which means that the guide member is always in contact with the display film during the movement of the display film, thereby ensuring that the display film is prevented from shaking left and right during the movement, thereby improving the user's viewing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0032] Figure 1 A schematic structural diagram of a first viewing angle of a projection screen provided in an embodiment of the present application;

[0033] Figure 2 A schematic structural diagram of a second viewing angle of a projection screen provided in an embodiment of the present application;

[0034] Figure 3 for Figure 2 A partial enlarged view of point I in the middle;

[0035] Figure 4 A schematic structural diagram of a guide unit in a projection screen provided in an embodiment of the present application;

[0036] Figure 5 A schematic diagram of a partial structure of a guide unit in a projection screen provided in an embodiment of the present application;

[0037] Figure 6 A schematic structural diagram of a third viewing angle of a projection screen provided in an embodiment of the present application;

[0038] Figure 7 A schematic diagram showing a rising diaphragm in a projection screen provided in an embodiment of the present application;

[0039] Figure 8 A schematic diagram showing a diaphragm descending in a projection screen provided in an embodiment of the present application;

[0040] Figure 9 A schematic structural diagram of a first viewing angle of another projection screen provided in an embodiment of the present application;

[0041] Figure 10 An exploded view of another central guide unit of a projection screen provided in an embodiment of the present application;

[0042] Figure 11 A schematic diagram of a portion of the structure of a central guide unit of another projection screen provided in an embodiment of the present application;

[0043] Figure 12 A schematic structural diagram of a central guide unit of another projection screen provided in an embodiment of the present application;

[0044] Figure 13 for Figure 12 Sectional view along line B-B';

[0045] Figure 14 A schematic structural diagram of a first viewing angle of another projection screen provided in an embodiment of the present application;

[0046] Figure 15 A schematic structural diagram of a second viewing angle of another projection screen provided in an embodiment of the present application;

[0047] Figure 16 This is an exploded view of a guide unit in another projection screen provided in an embodiment of the present application.

[0048] Description of reference numerals:

[0049] 100-projection screen;

[0050] 110-display diaphragm;

[0051] 120-bracket unit;

[0052] 121- bracket body;

[0053] 1211-first bracket;

[0054] 12111-first connecting hole;

[0055] 1212-Second bracket;

[0056] 12121-second connecting hole;

[0057] 1213- slide rail;

[0058] 1214-isolation block;

[0059] 12141-first isolation block;

[0060] 12142-second isolation block;

[0061] 122- roller;

[0062] 123-Mounting bracket;

[0063] 1231-adjustment hole;

[0064] 130-guide unit;

[0065] 131- guide member;

[0066] 1311-first abutting portion;

[0067] 1312- second abutting portion;

[0068] 132- elastic member;

[0069] 133-moving parts;

[0070] 1331-groove;

[0071] 134-bearing;

[0072] 135-sleeve;

[0073] 1351-opening;

[0074] 136-nut;

[0075] 140-Connector. DETAILED DESCRIPTION

[0076] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention. All other embodiments obtained are within the scope of protection of the present invention. The following embodiments and features in the embodiments may be combined with each other unless there is a conflict.

[0077] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0078] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0079] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0080] Currently, projection screens typically consist of a display film, a reel, and a lifting unit. One side of the display film is connected to the reel, and the other side is connected to the lifting unit. The reel controls the display film to retract, and the lifting unit controls the display film to unfold. The display film has a light-receiving surface for projection. However, during the lifting process of the display film in a projection screen, after reaching a certain position, the display film begins to wobble, affecting the central area and seriously affecting the user's viewing experience.

[0081] In order to overcome the defects in the prior art, the projection screen and projection system provided by the present invention have a guide member. During the process of the display film rising or falling, the guide member can move relative to the roller, thereby matching the variable distance between the display film and the roller during the movement. The variable distance is also the distance moved by the guide member, which means that the guide member is always in contact with the display film during the movement of the display film, thereby ensuring that the display film is prevented from shaking left and right during the movement, thereby improving the user's viewing experience.

[0082] The content of the present invention 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 present invention more clearly and in detail.

[0083] Figure 1 This is a schematic structural diagram of a first viewing angle of a projection screen provided in an embodiment of the present application. Figure 2 This is a schematic diagram of the structure of a second viewing angle of a projection screen provided in an embodiment of the present application. Figure 3 for Figure 2 The local enlarged view of point I in the middle, Figure 4 This is a structural diagram of a guide unit in a projection screen provided in an embodiment of the present application. Figure 5 This is a partial structural diagram of a guide unit in a projection screen provided by an embodiment of the present application. Figure 6 A schematic structural diagram of a third viewing angle of a projection screen provided in an embodiment of the present application.

[0084] like Figures 1 to 6 As shown, the embodiment of the present application provides a projection screen 100, comprising:

[0085] Display film 110, display film 110 has a projection light receiving surface;

[0086] It should be noted that the front surface of the display film 110 can be used to display a projection image.

[0087] The support unit 120 includes a support body 121 and a roller 122. The roller 122 is rotatably mounted on the support body 121. At least a portion of the display film 110 is wound around the outer periphery of the roller 122.

[0088] It should be noted that the display film 110 provided in the embodiment of the present application can include an unfolded state and a retracted state, wherein the unfolded state refers to a state in which the display film 110 is not rolled up and wound around the roller 122 and is unfolded outside the roller 122, and the retracted state refers to a state in which the display film 110 is rolled up and wound around the roller 122. Of course, the display film 110 can also be partially rolled up and wound around the roller 122, and the embodiment of the present application is not limited to this.

[0089] It should be noted that when the display film 110 is retracted, the display film 110 can be wound around the roller 122 .

[0090] The material of the display film 110 may include polyethylene terephthalate (PET). When the display film 110 is rolled onto the roller 122 , the display film 110 is wound into multiple layers on the roller 122 .

[0091] In addition, it should be noted that the bracket body 121 is mainly used to support the roller 122, which is rolled on the bracket body 121. The bracket body 121 reserves a certain rotation space for the roller 122. In addition, the rotation space is larger than the size of the roller 122, so that the display film 110 can be rolled on the outer periphery of the roller 122.

[0092] In some examples, the bracket body 121 may be a metal member, and its material may include one or more of copper, iron, aluminum, tin, and lead.

[0093] In other examples, the bracket body 121 may be made of plastic.

[0094] It should be noted that the embodiment of the present application does not impose any additional restrictions on the specific material of the bracket body 121 .

[0095] Of course, during manufacturing, the bracket body 121 can also be made of steel plates, plastics or synthetic materials while ensuring strength.

[0096] In some embodiments, the roller 122 and the bracket body 121 can be connected in a detachable connection manner or a fixed connection manner.

[0097] For example, bolts, buckles or hanging connections are used. Specifically, the embodiments of the present application are not too restrictive here.

[0098] In some embodiments, the bracket unit 120 may further include a mounting bracket 123 , wherein the bracket body 121 may be mounted on the mounting bracket 123 . The mounting bracket 123 is a structure for supporting the guide unit 130 and is used to mount the roller 122 .

[0099] It should be noted that the projection screen 100 provided in the embodiment of the present application is a screen that can be rolled up and down.

[0100] In addition, it should be noted that the projection screen 100 provided in the embodiment of the present application can be a pull-down projection screen 100, or a pull-up projection screen 100. When the projection screen 100 is a pull-down projection screen 100, after the projection screen 100 is set at a preset position, the user can pull the projection screen 100 out of the roller 122 from top to bottom. When the projection screen 100 is a pull-up projection screen 100, after the curling and lifting projection screen 100 is set at a preset position, the user can pull the projection screen 100 out of the roller 122 from bottom to top. In this case, the pulled-out projection screen 100 can be fixed to a preset position (such as a hook on a wall, or the projection screen 100 and the supporting structure layer are fixed by a bracket).

[0101] In an exemplary embodiment, the projection screen 100 provided in the embodiment of the present application may further include a crossbeam, which may be located at the other end of the projection screen 100 opposite to the roller 122 and may be used to support this end of the projection screen 100 .

[0102] like Figures 1 to 6 As shown, in some embodiments, the guide unit 130 may include a guide member 131, wherein the guide member 131 may be fixed on the mounting bracket 123, and an adjustment hole 1231 may be provided on the mounting bracket 123. The installation position of the guide member 131 can be adjusted according to the actual shaking situation. The guide member 131 is configured to move relative to the roller 122 when the display film 110 moves, so as to abut against the wall surface of the display film 110.

[0103] In some embodiments, the second end of the moving member 133 may also be fixed by a nut 136 to ensure the stability of the installation.

[0104] like Figure 6 As shown, the guide member 131 can prevent the display film 110 from shaking along the A direction during the movement.

[0105] By setting the guide member 131, the guide member 131 can move relative to the roller 122 during the rising or falling process of the display film 110, thereby matching the variable distance between the display film 110 and the roller 122 during the movement. The variable distance is also the distance moved by the guide member 131, which means that the guide member 131 is always in contact with the display film 110 during the movement of the display film 110, thereby ensuring that the display film 110 is prevented from shaking left and right during the movement, thereby improving the user's viewing experience.

[0106] Figure 7This is a schematic diagram showing the rise of a diaphragm in a projection screen provided in an embodiment of the present application. Figure 8 A schematic diagram showing a diaphragm descending in a projection screen provided in an embodiment of the present application.

[0107] like Figure 7 and Figure 8 As shown in FIG, as the diameter of the roller changes during the lifting of the display film 110, the guide member 131 may be out of contact with the display film 110. Figure 8 As shown, as the display film 110 descends, the diameter of the roll gradually increases, and the position of the display film 110 gradually moves away from the guide member 131.

[0108] Figure 9 This is a schematic diagram of the structure of another projection screen from a first perspective provided in an embodiment of the present application. Figure 10 This is an exploded view of another central guide unit of a projection screen provided in an embodiment of the present application. Figure 11 This is a partial structural diagram of another central guide unit of a projection screen provided in an embodiment of the present application. Figure 12 This is a structural diagram of another central guide unit of a projection screen provided in an embodiment of the present application. Figure 13 for Figure 12 Cross-sectional view along line BB'.

[0109] like Figures 9 to 13 As shown, in other embodiments, the guide unit 130 is movably provided on the bracket body 121, and the guide unit 130 includes a guide member 131 and an elastic member 132, the fixed end of the elastic member 132 is connected to the bracket body 121, and the free end of the elastic member 132 is connected to the guide member 131, and the guide member 131 is configured to move relative to the roller 122 when the display film 110 moves, so as to abut against the wall surface of the display film 110.

[0110] Therefore, the guide member 131 is moved relative to the roller 122 by the elastic member 132 , and thus remains in close contact with the display film 110 when the display film 110 moves, thereby preventing the display film 110 from shaking during the movement.

[0111] Through the above arrangement, that is, through the matching arrangement of the guide member 131 and the elastic member 132, during the process of the display film 110 rising or falling, the elastic member 132 can always push the guide member 131 by using its own elastic force, so that the guide member 131 can move relative to the roller 122 under the action of the elastic member 132, thereby matching the display film 110 with a variable distance from the roller 122 during the movement. The variable distance is also the distance moved by the guide member 131, which means that the guide member 131 is always in contact with the display film 110 during the movement of the display film 110, thereby ensuring that the display film 110 is prevented from shaking left and right during the movement, thereby improving the user's viewing experience.

[0112] It should be noted that the guide member 131 is always in contact with the display film 110 during the movement of the display film 110 , and has a certain abutting force on the display film 110 .

[0113] In the embodiment of the present application, when the projection device is not in use, the display film 110 is rolled up by a controller to reduce the space occupied by the display film 110. When the projection device is in use, the display film 110 is stretched out by a controller so that the display film 110 reflects the light beam emitted by the optical engine and displays the image.

[0114] When the display film 110 is in the expanded or retracted state, the guide member 131 is constantly pressed against the display film 110 under the push of the elastic member 132, so that the guide member 131 is always in contact with the display film 110 during the movement of the display film 110, thereby preventing the display film 110 from shaking left and right.

[0115] In some embodiments, the elastic member 132 and the bracket body 121 can be connected in a detachable connection manner or a fixed connection manner.

[0116] For example, bolts, buckles or hanging connections are used. Specifically, the embodiments of the present application are not too restrictive here.

[0117] like Figures 1 to 13 As shown, in some optional embodiments, the guide member 131 is a rotating shaft, and the guide member 131 is arranged to rotate around its own axis, and the axis of the guide member 131 is consistent with the axis of the roller 122.

[0118] In some embodiments, the projection screen 100 further includes a controller for controlling the rotation of the roller 122 to control the display film 110 to be rolled up around the outer periphery of the roller 122 to be in a retracted state, or to unfold the display film 110 .

[0119] It should be noted that when the guide member 131 is able to rotate, when the controller is curled to retract the display film 110, or tightened to unfold the display film 110, the guide member 131 rotates, thereby reducing the friction between the guide member 131 and the display film 110, preventing friction between the guide member 131 and the display film 110 from causing damage to the display film 110.

[0120] In some embodiments, the guide member 131 is in the form of an elongated strip, so as to be pressed against the display film 110 along its length, thereby providing a wide range of positional limits for the display film 110. Of course, the guide member 131 may also be in other shapes, as long as it can press against the display film 110 and limit its movement.

[0121] The cross-sectional shape of the guide member 131 may be circular or polygonal, which is not limited in the present embodiment. A guide member 131 with a circular cross-sectional shape is easier to process, and the surface of the guide member 131 is relatively smooth, making it less likely to damage the display film 110. A guide member 131 with a polygonal cross-sectional shape is more stable and less likely to wobble. When the cross-sectional shape of the guide member 131 is polygonal, for example, the cross-sectional shape is square or hexagonal.

[0122] like Figures 1 to 13 As shown, in some optional embodiments, the guide member 131 is movable relative to the roller 122 in the second direction, wherein the second direction has an angle with the moving direction of the display film 110 and an angle with the projection light receiving surface.

[0123] It should be noted that, for the sake of convenience, Figure 8 as well as Figure 10 As shown, C represents the second direction.

[0124] The guide member 131 moves back and forth in the second direction, mainly to always abut against the display film 110 to guide it and prevent it from shaking in the second direction.

[0125] In some embodiments, the second direction is perpendicular to the moving direction of the display film 110 .

[0126] like Figures 9 to 13 As shown, in some optional embodiments, the bracket body 121 has a slide rail 1213, and the guide member 131 is configured to move within the slide rail 1213;

[0127] The slide rail 1213 is disposed along the length direction of the bracket body 121 , and an angle is formed between the length direction of the guide member 131 and the length direction of the slide rail 1213 .

[0128] It should be noted that the setting of the slide rail 1213 provides a movable space for the guide member 131 to move in the second direction, and can guide the movement of the guide member 131 so that it can maintain movement in the second direction during the movement, avoiding tilting during the movement, and making its movement more stable.

[0129] In some embodiments, the slide rail 1213 is disposed at the bottom wall of the bracket body 121 to improve the utilization of the internal space.

[0130] Specifically, the length direction of the bracket body 121 may also be the moving direction of the guide member 131 .

[0131] like Figures 9 to 13 As shown, in some optional embodiments, there are two slide rails 1213, and the two slide rails 1213 are spaced apart along the height direction of the bracket body 121 to form a sliding space, and the guide member 131 is configured to move in the sliding space.

[0132] In some optional embodiments, the bracket body 121 is provided with an isolation block 1214 , the isolation block 1214 having a sliding surface for the guide member 131 to slide, and the isolation block 1214 is extended along the length direction of the slide rail 1213 ;

[0133] The guide member 131 has a first abutting portion 1311 and a second abutting portion 1312. The first abutting portion 1311 and the second abutting portion 1312 both protrude from the outer periphery of the guide member 131. The first abutting portion 1311 and the second abutting portion 1312 are arranged at intervals. The first abutting portion 1311 abuts against the first side wall of the isolation block 1214, and the second abutting portion 1312 abuts against the second side wall of the isolation block 1214.

[0134] It should be noted that the setting of the isolation block 1214 and the first abutment portion 1311 and the second abutment portion 1312 enables the first abutment portion 1311 to abut against the first side wall of the isolation block 1214 during the sliding process of the guide member 131, and move along the length direction of the first side wall of the isolation block 1214 to limit it and avoid deviation in its moving trajectory during the movement process.

[0135] Accordingly, the second abutting portion 1312 can abut against the second side wall of the isolation block 1214 and move along the length direction of the second side wall of the isolation block 1214 to limit it and avoid deviation of its movement trajectory during the movement process.

[0136] In some embodiments, the first abutting portion 1311 contacts the bottom wall of the slide rail. In other embodiments, there is a gap between the first abutting portion 1311 and the bottom wall of the slide rail, which means that the first abutting portion 1311 is suspended on the bottom wall of the slide rail.

[0137] In some embodiments, the second abutting portion 1312 contacts the bottom wall of the slide rail. In other embodiments, a gap exists between the second abutting portion 1312 and the bottom wall of the slide rail, meaning that the second abutting portion 1312 is suspended from the bottom wall of the slide rail, thereby reducing the contact area between the two and further reducing friction during movement, thereby making movement smoother.

[0138] In some embodiments, the isolation block 1214 and the bracket body 121 are connected in an integrated manner. In other embodiments, the isolation block 1214 and the bracket body 121 can also be connected in other manners. As long as the connection method can fix the isolation block 1214 and the bracket body 121, the purpose of this embodiment can be achieved. Here, there is no restriction on the connection method between the isolation block 1214 and the bracket body 121.

[0139] like Figures 9 to 13 As shown, in some optional embodiments, there is at least one isolation block 1214, and the at least one isolation block 1214 includes a first isolation block 12141 and a second isolation block 12142, and the first isolation block 12141 and the second isolation block 12142 are spaced apart.

[0140] The first abutting portion 1311 abuts against a side wall of the first isolation block 12141 , and the second abutting portion 1312 abuts against a side wall of the second isolation block 12142 .

[0141] It should be noted that the purpose of setting the first isolation block 12141 and the second isolation block 12142 at intervals is to minimize the contact area between the sliding surface and the guide member 131, thereby reducing friction during the movement and making the sliding smoother.

[0142] like Figures 1 to 13 As shown, in some optional embodiments, the guide unit 130 further includes a moving member 133, a bearing 134 and a sleeve 135, the moving member 133 is a support shaft; the elastic member 132 is connected between the moving member 133 and the bracket body 121;

[0143] The first end of the moving member 133 is connected to the inner ring of the bearing 134 , and the guide member 131 is connected to the outer ring of the bearing 134 so that the guide member 131 rotates relative to the moving member 133 . The sleeve 135 is sleeved on the second end of the moving member 133 and connected to the bracket body 121 .

[0144] It should be noted that the arrangement of the moving member 133 , the bearing 134 and the sleeve 135 ensures the installation stability and movement stability of the entire guide member 131 , so as to achieve smooth transmission of the force between the moving member 133 and the guide member 131 .

[0145] It should be noted that the setting of the bearing 134, on the one hand, ensures the connection between the two axes of the moving part 133 and the guide part 131, and on the other hand, through the design of the mutual rotation of its own inner ring and outer ring, the moving part 133 is fixedly connected to the inner ring of the bearing 134, ensuring that it can move on the slide rail 1213, and the guide part 131 is connected to the outer ring of the bearing 134, ensuring that the guide part 131 can drive the guide part 131 to move in the second direction when the moving part 133 moves. In addition, it can also rotate around its own axial direction, thereby reducing the wear on the display film 110.

[0146] In some embodiments, an opening 1351 is provided on the sleeve 135, and a groove 1331 is provided on the movable member 133, wherein the opening 1351 and the groove 1331 are arranged relative to each other, so that the end of the elastic member 132 passes through the opening 1351 and the groove 1331 in sequence and is finally fixed on the movable member 133.

[0147] In some embodiments, the bracket body 121 includes a first bracket 1211 and a second bracket 1212 , wherein the slide rail 1213 is arranged on the second bracket 1212 , the fixed end of the elastic member 132 is connected to the first bracket 1211 , and the free end of the elastic member 132 is connected to the movable member 133 .

[0148] In some embodiments, the first bracket 1211 is a plate-shaped structure.

[0149] In some embodiments, in order to improve the installation stability between the first bracket 1211 and the second bracket 1212, a connecting member 140 is also included. A first connecting hole 12111 is opened on the first bracket 1211, and a second connecting hole 12121 is opened on the second bracket 1212. The connecting member 140 passes through the first connecting hole 12111 and the second connecting hole 12121 in sequence to connect the first bracket 1211 and the second bracket 1212.

[0150] It should be noted that, by combining pre-installation and screw installation, the first bracket 1211 and the second bracket 1212 are installed more stably and with higher installation strength.

[0151] It should be noted that in the embodiment of the present application, considering the cost of the connecting member 140, the connecting member 140 can be a threaded fastener. Correspondingly, a first connecting hole 12111 is opened on the first bracket 1211. The first connecting hole 12111 can be a threaded hole. The connecting member 140 can pass through the first connecting hole 12111 and can be tightened or loosened to adjust the fixed and disassembled states.

[0152] In addition, correspondingly, a second connecting hole 12121 is opened on the second bracket 1212, and the second connecting hole 12121 can also be a threaded hole. The connecting member 140 can pass through the second connecting hole 12121 and can be tightened or loosened to adjust the fixed and disassembled states.

[0153] Specifically, the connecting member 140 passes through the first connecting hole 12111 and the second connecting hole 12121 in turn and is tightened, so that the second bracket 1212 can be fixed to the first bracket 1211. Of course, when the second bracket 1212 needs to be removed, it is only necessary to loosen the connecting member 140, and then remove the connecting member 140 from the second connecting hole 12121 and the first connecting hole 12111 in turn.

[0154] In some embodiments, the second end of the moving member 133 may also be fixed by a nut 136 to ensure the stability of the installation.

[0155] In some optional embodiments, the guide member 131 extends along the length direction of the roller 122, and the length of the guide member 131 matches the length of the roller 122; or,

[0156] There are two guide members 131 , and the two guide members 131 are respectively located at two opposite ends of the roller 122 .

[0157] It should be noted that the main problem with the integrated guide member 131 is its excessive length. To ensure installation space, the diameter cannot be too large, which poses a certain strength risk. The guide member 131 is prone to bending when the span of the fixed position on both sides exceeds 2 meters. Using a higher-strength titanium alloy roller would significantly increase the cost.

[0158] Figure 14 This is a schematic structural diagram of a first viewing angle of another projection screen provided in an embodiment of the present application. Figure 15 This is a structural diagram of a second viewing angle of another projection screen provided in an embodiment of the present application. Figure 16 This is an exploded view of a guide unit in another projection screen provided in an embodiment of the present application.

[0159] like Figures 9 to 16 As shown, in other embodiments, the guide member 131 can be split, which means that there can be two of them, and the specific number can be adjusted according to actual conditions.

[0160] Specifically, two guide members 131 are designed, one on each side of the roller 122 , and only the two sides of the display film 110 are tensioned, which can also effectively reduce the shaking effect and effectively reduce the risk of the guide member 131 being bent under stress.

[0161] The guide 131 functions only during the raising and lowering of the display film 110. Once fully raised, the guide 131 is positioned at the top or bottom of the display film 110. This position does not affect the viewing area and does not exacerbate wrinkles in the center. Considering the raw material of the display film 110, which is typically tight in the center and loose at the sides, the display film 110 itself is also required to be attached in a tight center and loose at the sides to ensure a smooth viewing area.

[0162] The projection screen provided by the embodiment of the present application includes: a display film having a projection light-receiving surface; a bracket unit, the bracket unit including a bracket body and a roller, the roller is rotatably set on the bracket body, and at least part of the display film is rolled up on the outer circumference of the roller; a guide unit, the guide unit is movably set on the bracket body, the guide unit includes a guide member, and the guide member is configured to move relative to the roller when the display film moves, so as to abut against the wall surface of the display film.

[0163] Through the setting of the guide member, the guide member can move relative to the roller during the rising or falling process of the display film, thereby matching the variable distance between the display film and the roller during the movement process. The variable distance is also the distance moved by the guide member, which means that the guide member is always in contact with the display film during the movement of the display film, thereby ensuring that the display film is prevented from shaking left and right during the movement, thereby improving the user's viewing experience.

[0164] In addition, if Figures 1 to 16 As shown, the embodiment of the present application also provides a projection screen 100, including:

[0165] Display film 110, display film 110 has a projection light receiving surface;

[0166] The roller 122 has at least a portion of the display film 110 wound around the outer periphery of the roller 122 ;

[0167] The guide unit 130 includes a guide member 131 . The guide member 131 is configured to move relative to the roller 122 when the display film 110 moves, so as to abut against the wall surface of the display film 110 .

[0168] The projection screen provided by the embodiment of the present application has a matching arrangement of a guide member and an elastic member. During the process of the display diaphragm rising or falling, the elastic member can always push the guide member by utilizing its own elastic force, so that the guide member can move relative to the roller under the action of the elastic member, thereby matching the display diaphragm with a variable distance from the roller during movement. The variable distance is also the distance moved by the guide member, which means that the guide member is always in contact with the display diaphragm during movement, thereby ensuring that the display diaphragm is prevented from shaking left and right during movement, thereby improving the user's viewing experience.

[0169] In addition, an embodiment of the present application further provides a projection system, including a projection device and the above-mentioned projection screen 100 , where the projection device is used to project a projection image onto the projection screen 100 .

[0170] It should be noted that a projection host is installed in the projection device. The projection host can be an ultra-short-throw projection host, which can be a DLP (Digital Light Processing) projection host. In this way, the distance between the projection host and the plane where the display film 110 is located is set to a relatively short distance to achieve a miniaturized design of the entire projection device. The projection host can include: a light source, an optical engine, and a lens (not shown in the figure). The light source is used to emit a light beam to the optical engine.

[0171] In some embodiments, the display film 110 includes an optical film and a rollable substrate. The optical film is bonded to the rollable substrate. The rollable substrate is fixedly connected to the controller. The controller can tighten to unfold the rollable substrate, or roll to fold the rollable substrate. When the rollable substrate is unfolded, it supports the optical film in a flat state. The optical film is used to reflect the light beam emitted by the optical engine to display the picture.

[0172] In some embodiments, the display film 110 includes an optical film and a flexible carrier; the optical film is bonded to the flexible carrier, and the two opposite sides of the flexible carrier are fixedly connected to the controller, and the controller can tighten the two sides of the flexible carrier to unfold the flexible carrier, or curl the flexible carrier to fold the flexible carrier. When the flexible carrier is unfolded, it supports the optical film in a flat state.

[0173] In this way, while the controller indirectly tightens the optical film through the flexible carrier, the flexible carrier bears a portion of the tightening force of the controller, making the optical film less likely to be damaged, thereby ensuring the flatness of the optical film.

[0174] The flexible carrier is a synthetic fabric, film, or other carrier that is easily curled and has sufficient load-bearing strength. When the flexible carrier is a synthetic fabric, the material of the flexible carrier is a synthetic material containing nylon. Because nylon has high mechanical strength, good toughness, and high tensile and compressive strength, the flexible carrier is not easily deformed when stretched by the controller, and its surface is smooth, thereby improving the flatness of the optical film. Of course, the flexible carrier can also be made of other materials.

[0175] The optical film and the flexible carrier are bonded together by double-sided tape or adhesive film, or by other methods, which is not limited in the embodiment of the present application.

[0176] 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 image onto the display film 110 of the projection screen 100 .

[0177] 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.

[0178] 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.

[0179] By matching the guide member and the elastic member, during the process of the display film rising or falling, the elastic member can always push the guide member by using its own elastic force, so that the guide member can move relative to the roller under the action of the elastic member, thereby matching the display film with a variable distance from the roller during movement. The variable distance is also the distance moved by the guide member, which means that the guide member is always in contact with the display film during the movement of the display film, thereby ensuring that the display film is prevented from shaking left and right during movement, thereby improving the user's viewing experience.

[0180] 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, indicating orientations or positional relationships, are 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 operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0181] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0182] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A projection screen, characterized in that: include: A display film having a projection light receiving surface; a bracket unit, the bracket unit comprising a bracket body and a roller, the roller being rotatably disposed on the bracket body, and at least a portion of the display film being wound around an outer circumference of the roller; A guide unit is movably provided on the bracket body, and the guide unit includes a guide member. The guide member is configured to move relative to the roller when the display film moves, so as to abut against the wall surface of the display film.

2. The projection screen according to claim 1, wherein The guide member is a rotating shaft, and the guide member is arranged to rotate around its own axial direction. The axial direction of the guide member is consistent with the axial direction of the roller.

3. The projection screen according to claim 1, wherein: The guide member is movable relative to the roller in a second direction, wherein the second direction forms an angle with the moving direction of the display film, and the second direction forms an angle with the projection light receiving surface.

4. The projection screen according to any one of claims 1 to 3, characterized in that: The guide unit further includes an elastic member, a fixed end of the elastic member is connected to the bracket body, and a free end of the elastic member is connected to the guide member.

5. The projection screen according to claim 4, characterized in that The bracket body has a slide rail, and the guide member is configured to move within the slide rail; The slide rail is arranged along the length direction of the bracket body, and an angle is formed between the length direction of the guide member and the length direction of the slide rail.

6. The projection screen according to claim 5, characterized in that There are two slide rails, which are spaced apart along the height direction of the bracket body to form a sliding space, and the guide member is configured to move in the sliding space; An isolation block is provided on the bracket body, and the isolation block has a sliding surface for the guide member to slide. The isolation block extends along the length direction of the slide rail, and the guide member has a first abutting portion and a second abutting portion. The first abutting portion and the second abutting portion both protrude from the outer periphery of the guide member, and the first abutting portion and the second abutting portion are spaced apart. The first abutting portion abuts against the first side wall of the isolation block, and the second abutting portion abuts against the second side wall of the isolation block.

7. The projection screen according to claim 6, characterized in that There is at least one isolation block, and the at least one isolation block includes a first isolation block and a second isolation block, and the first isolation block and the second isolation block are spaced apart. The first abutting portion abuts against a side wall of the first isolation block, and the second abutting portion abuts against a side wall of the second isolation block.

8. The projection screen according to claim 7, characterized in that The guide unit further includes a moving member, a bearing and a sleeve, wherein the moving member is a support shaft, and the elastic member is connected between the moving member and the bracket body; The first end of the moving member is connected to the inner ring of the bearing, and the guide member is connected to the outer ring of the bearing so that the guide member can rotate relative to the moving member. The sleeve is sleeved on the second end of the moving member and connected to the bracket body.

9. A projection screen, characterized in that: include: A display film having a projection light receiving surface; a roller, at least a portion of the display film being wound around the outer periphery of the roller; The guide unit includes a guide member, and the guide member is configured to move relative to the roller when the display film moves, so as to abut against the wall surface of the display film.

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

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