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 supporting seat, a roller and a lifting support, the roller is rotationally arranged on the supporting seat, at least part of the display membrane is wound on the periphery of the roller, the lifting support is movably arranged between the top end of the display membrane and the supporting seat, when the lifting support ascends, the display membrane is in an unfolded state, and when the lifting support descends, the display membrane is in an unfolded state. The display diaphragm is in a storage state; the first buffering unit comprises a first buffering piece, at least part of the first buffering piece is of a deformation structure, the deformation quantity of the first buffering piece is larger than that of the display membrane, and the first buffering piece is located on at least one of the position between the display membrane and the roller and the position between the roller and the supporting base. The problem of shaking of the display diaphragm is solved, the stability of the display diaphragm is improved, the service life of the display diaphragm is prolonged, and meanwhile the use experience of a user is improved.

Description

Technical Field

[0001] This application relates to the field of projection technology, and in particular to a projection screen and projection system. Background Technology

[0002] As society continues to develop, people's pursuits are also constantly changing. For laser TVs, the portability and simplicity of the screen have become key considerations. Rollable projection screens, with their advantages of small size, easy transportation and installation, and good integration with home environments, represent a major direction for differentiating projection displays from traditional flat-panel displays.

[0003] Currently, to facilitate lifting and winding, the top of the display film is usually fixed to the crossbeam and the bottom is fixed to the roller. In this way, the top and bottom of the display film are completely fixed, and the display film is wound up and unwound by rotating the bottom roller.

[0004] However, this causes the display film to be directly affected by external forces and vibrations (such as walking, wind, and equipment operation) during the lifting and unfolding process. This results in noticeable shaking of the display film, and the thin film material spreads outward from the starting point of the shaking, similar to a ripple effect on water. That is, the shaking stops at the initial position, but shaking has just begun at other positions, making it difficult to completely stop the shaking of the entire display film. This shaking of the display film is very detrimental to projection display, causing image distortion and affecting the user's viewing experience, thus reducing user satisfaction.

[0005] Application content

[0006] The main objective of this application is to provide a projection screen and projection system that improves the wobbling problem of the display film, enhances the stability and lifespan of the display film, and improves the user experience.

[0007] To achieve the above objectives, in a first aspect, this application provides a projection screen, comprising:

[0008] The display film has a projection light-receiving surface;

[0009] The support unit includes a support base, a roller, and a lifting bracket. The roller is rotatably mounted on the support base, and at least part of the display film is rolled around the outer periphery of the roller. The lifting bracket is movably mounted between the top of the display film and the support base. When the lifting bracket rises, the display film is in an unfolded state, and when the lifting bracket falls, the display film is in a retracted state.

[0010] The first buffer unit includes a first buffer element, at least a portion of which is a deformable structure. The deformation of the first buffer element is greater than that of the display film. The first buffer element is located on at least one of the display film and the roller, or between the roller and the support base.

[0011] The beneficial effects of this application are as follows: By setting the first buffer unit and utilizing the material properties of the first buffer component, the shaking of the display film caused by external environmental factors (such as wind, mechanical vibration, etc.) can be effectively reduced. It can absorb and disperse external forces and vibrations, reducing the direct transmission of these forces to the display film, thus significantly reducing the amplitude and frequency of the display film's shaking. This improves the stability of the display film, reduces image jitter and blurring, provides better image quality and viewing experience, and increases customer satisfaction. Furthermore, it reduces the direct impact of external forces on the display film material, thereby extending the lifespan of the display film. In other words, by adding the first buffer component to form a buffer and vibration-absorbing structure, external forces and vibrations can be effectively absorbed, significantly improving the shaking problem of the display film, increasing the stability and lifespan of the display film, and enhancing the user experience.

[0012] Based on the above technical solution, the following improvements can be made to this application.

[0013] In some alternative embodiments, the roller is provided with an insert groove that is positioned along the length of the roller;

[0014] The end of the display film extends into the embedding groove through the groove opening, and the first buffer is connected between the groove wall of the embedding groove and the display film.

[0015] In some alternative embodiments, the first buffer unit further includes a fixing member and a first reinforcing member, at least one of which is a plate-like structure;

[0016] The fixing member is set in the embedding groove, the first end of the first buffer member is set on the fixing member, the bottom ends of the first reinforcing member and the display film are both opened with first mounting holes, and the second end of the first buffer member passes through the first mounting hole of the first reinforcing member and the first mounting hole of the display film in sequence, so that the second end of the first buffer member is fixed on the first reinforcing member and the display film.

[0017] In some alternative embodiments, the roller has two abutting portions, which are spaced apart on the periphery of the roller and extend from the periphery of the roller into the embedding groove, and have a gap between them and the bottom of the embedding groove, and the two abutting portions form the opening of the embedding groove.

[0018] The fastener is located within the gap and abuts against the end walls of the two abutment portions.

[0019] In some alternative implementations, the first buffer unit further includes a floating element and a limiting element, with the end of the roller connected to the floating element, which is movably mounted on the support.

[0020] The limiting member is set on the support base and located on the floating member. One end of the first buffer member is connected to the floating member, and the other end of the first buffer member is connected to the limiting member, so that the first buffer member is located between the roller and the support base.

[0021] In some alternative embodiments, the support base is provided with a sliding groove, the opening of the sliding groove facing the top of the support base, and the sliding groove extends along the moving direction of the display film.

[0022] At least one of the floating component and the limiting component is a block structure. The floating component moves within the sliding groove so that the distance between the limiting component and the floating component is variable.

[0023] In some alternative implementations, the support unit further includes a crossbeam located at the end of the display film opposite to the roller to support the end of the display film.

[0024] The projection screen also includes a second buffer unit, which includes a second buffer member and a second reinforcing member. At least part of the second buffer member is a deformable structure. The first end of the second buffer member is disposed on the crossbeam. The top ends of the second reinforcing member and the display film are both provided with second mounting holes. The second end of the second buffer member passes through the second mounting hole of the second reinforcing member and the second mounting hole of the display film in sequence, so that the second end of the second buffer member is disposed on the second reinforcing member and the display film.

[0025] In some alternative embodiments, the second buffer includes a buffer portion and a stop portion, and a mounting groove is provided on the crossbeam, with the opening of the mounting groove facing the end of the display film;

[0026] The bottom of the mounting groove has a mounting opening that extends through the opposite sides of the bottom of the mounting groove. The stop part abuts against the side of the bottom of the mounting groove away from the opening of the mounting groove. The first end of the buffer part is connected to the second reinforcing member, and the second end of the buffer part extends into the mounting opening and is connected to the stop part.

[0027] In some alternative implementations, the support unit also includes an adapter frame, the lifting support is a linkage structure, the lifting support is located between the crossbeam and the support base, and the lifting support is configured to drive the display film to unfold or retract.

[0028] The crossbeam has a receiving cavity, the adapter is located in the receiving cavity, the lifting bracket is rotatably mounted on the adapter, and the second buffer unit includes a third buffer member located between the adapter and the crossbeam so that the distance between the adapter and the crossbeam along the moving direction of the display film is variable.

[0029] In some alternative embodiments, at least one of the first, second, and third buffers is a flexible element; or,

[0030] At least one of the first, second, and third buffer components is an elastic component.

[0031] In some alternative embodiments, at least one of the upper and lower ends of the display film has an elastic thin film portion, the deformation of which is greater than that of the display film.

[0032] Secondly, this application also provides a projection screen, comprising: a display film; a support and a roller, the roller being rotatably disposed on the support, at least a portion of the display film being rolled around the outer periphery of the roller; and a buffer, at least a portion of the buffer being a deformable structure, the buffer being configured to absorb the sway of the display film, the buffer being located on at least one of the display film and the roller, and the roller and the support.

[0033] Thirdly, this application also provides a projection system, including a projection device and the aforementioned projection screen, wherein the projection device is used to project a projected image onto the projection screen.

[0034] The projection screen and projection system provided in this application include a projection device and a projection screen. The projection device is used to project a projected image onto the projection screen. The projection screen includes: a display film having a projection light-receiving surface; a support unit including a support base, a roller, and a lifting bracket. The roller is rotatably mounted on the support base, and at least a portion of the display film is rolled up around the outer periphery of the roller. The lifting bracket is movably mounted between the top of the display film and the support base, so that the display film is in an unfolded state when the lifting bracket rises and in a retracted state when the lifting bracket falls; and a first buffer unit including a first buffer element, at least a portion of which is a deformable structure. The deformation of the first buffer element is greater than the deformation of the display film, and the first buffer element is located on at least one of the spaces between the display film and the roller, and between the roller and the support base.

[0035] By incorporating the first buffer unit and utilizing its material properties, the vibration of the display film caused by external environmental factors (such as wind and mechanical vibration) can be effectively reduced. It absorbs and disperses external forces and vibrations, reducing the direct transmission of these forces to the display film. This significantly reduces the amplitude and frequency of the display film's vibration, thereby improving its stability, reducing image jitter and blurring, providing better image quality and viewing experience, and increasing customer satisfaction. Furthermore, it reduces the direct impact of external forces on the display film material, thus extending its lifespan. In short, by adding the first buffer to form a shock-absorbing structure, external forces and vibrations can be effectively absorbed, significantly improving the vibration problem of the display film, increasing its stability and lifespan, and enhancing the user experience. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the structure of the projection screen provided in an embodiment of this application;

[0038] Figure 2 This is a schematic diagram illustrating the assembly of the display film and the roller in a projection screen provided in an embodiment of this application.

[0039] Figure 3 An assembly diagram of a first buffer unit installed between a roller and a display film in a projection screen provided in an embodiment of this application, showing a first viewpoint.

[0040] Figure 4 A schematic diagram of the assembly of a first buffer unit installed between a roller and a display film in a projection screen provided in an embodiment of this application, from a second perspective;

[0041] Figure 5 An assembly diagram of a first viewing angle showing another first buffer unit installed between a roller and a display film in a projection screen provided in an embodiment of this application;

[0042] Figure 6 A schematic diagram of an assembly from a second perspective showing another first buffer unit installed between a roller and a display film in a projection screen provided in an embodiment of this application;

[0043] Figure 7 An assembly diagram of the first buffer unit in the projection screen installed between the roller and the support base, provided in an embodiment of this application;

[0044] Figure 8 A schematic diagram of an assembly from a first perspective showing a second buffer unit installed between a display film and a crossbeam in a projection screen provided in an embodiment of this application.

[0045] Figure 9 A schematic diagram of an assembly of a second buffer unit installed between a display film and a crossbeam in a projection screen provided in an embodiment of this application;

[0046] Figure 10 A schematic diagram of an assembly from a first perspective showing another second buffer unit in a projection screen provided in an embodiment of this application installed between a display film and a crossbeam;

[0047] Figure 11 A schematic diagram of an assembly of a second perspective view of another second buffer unit in a projection screen provided in an embodiment of this application, installed between a display film and a crossbeam;

[0048] Figure 12 A first-view assembly diagram showing the installation of a second buffer unit between a display film and a crossbeam in a projection screen provided in an embodiment of this application.

[0049] Figure 13 A schematic diagram of an assembly of a second buffer unit installed between a display film and a crossbeam in a projection screen according to an embodiment of this application;

[0050] Figure 14 An assembly diagram of the second buffer unit in the projection screen provided in this application embodiment, installed between the lifting bracket and the crossbeam;

[0051] Figure 15 This is a schematic diagram of the structure of a projection system provided in an embodiment of this application.

[0052] Explanation of reference numerals in the attached figures:

[0053] 100 - Projection screen; 110 - Display film;

[0054] 120-Bracket unit; 121-Support base; 1211-Sliding groove; 122-Roller; 1221-Embedding groove; 1222-Abutting part; 123-Crossbeam; 1231-Mounting groove; 1232-Receiving cavity; 124-Lifting bracket; 125-Adapter frame;

[0055] 130 - First buffer unit; 131 - First buffer component; 132 - Fixing component; 133 - First reinforcing component; 134 - Floating component; 135 - Limiting component;

[0056] 140 - Second buffer unit; 141 - Second buffer component; 1411 - Buffer section; 1412 - Stop section; 142 - Second reinforcing component; 143 - Third buffer component;

[0057] 200 - Projection system; 210 - Projection device; 211 - Storage section; 2111 - Light-transmitting area; 2112 - Opening. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. All other obtained embodiments are within the scope of protection of this application. In the absence of conflict, the following embodiments and features can be combined with each other.

[0059] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0060] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] Currently, to facilitate lifting and rolling, the top of the display film is usually fixed to a crossbeam, and the bottom is fixed to a roller. This ensures the film is completely fixed from top to bottom, and the film is rolled up and unrolled by rotating the lower roller. However, to achieve better optical performance and gain for ultra-short throw projection, polyethylene terephthalate (PET) films are preferred over black grid screens. However, PET films are rigid and have poorer elasticity and extensibility compared to black grid screens. When placed on a lifting projection screen, the stability issues of the PET film during lifting are more severe. This means that during lifting and unfolding, external forces and vibrations (such as walking, wind, and equipment operation) are directly transmitted to the display film, causing noticeable shaking. The thin film material spreads outward from the starting point of the shaking, similar to a ripple effect on water. That is, the shaking stops at the initial position, but shaking begins at other positions, making it difficult to completely stop the shaking of the entire display film. The shaking of the display film is very detrimental to the projection display, causing image distortion and affecting the user's viewing experience, thus reducing user satisfaction.

[0063] In addition, to achieve large-size displays, the size of the membrane will be increased, and the lifting time can be shortened to improve the user experience. However, such improvements will further amplify membrane stability issues, such as making it more difficult to control the uniformity of force on large sizes and causing severe water ripples in the middle area.

[0064] To overcome the shortcomings of existing technologies, the projection screen and projection system provided in this application, through the setting of a first buffer unit, utilizes the material properties of the first buffer component to effectively reduce the shaking of the display film caused by external environmental factors (such as wind, mechanical vibration, etc.). It can absorb and disperse external forces and vibrations, reducing the direct transmission of these forces to the display film, thus significantly reducing the amplitude and frequency of the display film's shaking. This improves the stability of the display film, reduces image jitter and blurring, provides better image quality and viewing experience, and increases customer satisfaction. Furthermore, it reduces the direct impact of external forces on the display film material, thereby extending the lifespan of the display film. In other words, by adding a first buffer component to form a buffer and vibration-absorbing structure, external forces and vibrations can be effectively absorbed, significantly improving the shaking problem of the display film, increasing the stability and lifespan of the display film, and simultaneously enhancing the user experience.

[0065] The contents of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can have a clearer and more detailed understanding of the contents of this application.

[0066] Figure 1 This is a schematic diagram of the projection screen provided in an embodiment of this application. Figure 2 This is a schematic diagram illustrating the assembly of the display film and the roller in the projection screen provided in an embodiment of this application. Figure 3 This is an assembly diagram from a first perspective showing a first buffer unit installed between a roller and a display film in a projection screen provided in an embodiment of this application. Figure 4 This is a schematic diagram of the assembly of a first buffer unit installed between a roller and a display film in a projection screen provided in an embodiment of this application, from a second perspective.

[0067] like Figures 1 to 4 As shown, this application embodiment provides a projection screen 100, including:

[0068] Display diaphragm 110, display diaphragm 110 has a projection light-receiving surface;

[0069] The support unit 120 includes a support base 121, a roller 122, and a lifting bracket. The roller 122 is rotatably mounted on the support base 121. At least a portion of the display film 110 is rolled around the outer periphery of the roller 122. The lifting bracket is movably mounted between the top of the display film 110 and the support base 121. When the lifting bracket rises, the display film 110 is in an unfolded state. When the lifting bracket falls, the display film 110 is in a retracted state.

[0070] The first buffer unit 130 includes a first buffer member 131. At least a portion of the first buffer member 131 is a deformable structure. The deformation of the first buffer member 131 is greater than the deformation of the display film 110. The first buffer member 131 is located on at least one of the display film 110 and the roller 122, and the roller 122 and the support base 121.

[0071] Through the above-described configuration, specifically the first buffer unit 130, and utilizing the material properties of the first buffer element 131, the shaking of the display film 110 caused by external environmental factors (such as wind and mechanical vibration) can be effectively reduced. It absorbs and disperses external forces and vibrations, reducing the direct transmission of these forces to the display film 110. This significantly reduces the amplitude and frequency of the display film 110's shaking, thereby improving its stability, reducing image jitter and blur, providing better image quality and viewing experience, and increasing customer satisfaction. Furthermore, it reduces the direct impact of external forces on the material of the display film 110, thus extending its lifespan. In other words, by adding the first buffer element 131 to form a buffer and vibration-absorbing structure, external forces and vibrations can be effectively absorbed, significantly improving the shaking problem of the display film 110, increasing its stability and lifespan, and enhancing the user experience.

[0072] Specifically, since the faster the display diaphragm 110 rises and falls, the more noticeable its vibration, the addition of the first buffer unit 130 can absorb the buffering force. Specifically, the vibration level of the display diaphragm 110 when it rises in the first time after adding the first buffer unit 130 is about the same as the vibration level of the display diaphragm 110 when it rises in the second time without adding the first buffer unit 130. The length of the first time is shorter than the length of the second time. For example, the first time can be 30 seconds or 20 seconds; the second time can be 50 seconds or 40 seconds, etc. In other words, the vibration level of the display diaphragm 110 when it rises in 30 seconds after adding the first buffer unit 130 is about the same as the vibration level of the display diaphragm 110 when it rises in 50 seconds without adding the first buffer unit 130.

[0073] It should be noted that the projection screen 100 provided in this application embodiment is a rollable and height-adjustable screen.

[0074] Additionally, it should be noted that the projection screen 100 provided in this application embodiment can be a pull-down projection screen 100 or an upward projection screen 100. When the projection screen 100 is a pull-down projection screen 100, after it is set in a preset position, the user can pull the projection screen 100 out from the roller 122 from top to bottom. When the projection screen 100 is an upward projection screen 100, after it is set in a preset position, the user can pull the projection screen 100 out from the roller 122 from bottom to top. In this case, the pulled-out projection screen 100 can be fixed in a preset position (such as a hook on the wall, or the projection screen 100 and the supporting structure layer can be fixed by the lifting bracket 124).

[0075] It should be noted that the following sections will provide a detailed explanation of each structure.

[0076] [Display diaphragm 110]

[0077] It should be noted that the front of the display diaphragm 110 can be used to display projected images.

[0078] It should be noted that the display film 110 provided in this application embodiment may include an unfolded state and a retracted state. The unfolded state refers to the state in which the display film 110 is not rolled and wound around the roller 122 and is unfolded outside the roller 122. The retracted state refers to the state in which the display film 110 is rolled and wound around the roller 122. Of course, the display film 110 may also be partially rolled and wound around the roller 122, and this application embodiment does not limit this.

[0079] It should be noted that when the display diaphragm 110 is retracted, the display diaphragm 110 can be wound onto the roller 122.

[0080] The material of the display diaphragm 110 may include polyethylene terephthalate (PET). When the display diaphragm 110 is rolled onto the roller 122, the display diaphragm 110 is wound into multiple layers on the roller 122.

[0081] It should be noted that in the height-adjustable projection screen 100, the display film 110 is directly fixed to the relatively rigid crossbeam 123 and roller 122. The display film 110 is relatively weak, and external vibrations and energy are easily transmitted to the display film 110, which is absorbed and digested by the shaking of the display film 110. In order to reduce the shaking of the display film 110 and improve the user's viewing experience.

[0082] In some alternative embodiments, at least one of the upper and lower ends of the display diaphragm 110 has an elastic film portion, the deformation of which is greater than the deformation of the display diaphragm 110.

[0083] In some embodiments, elastic thin film materials are provided at the upper and lower ends of the display diaphragm 110, such as thin rubber glued on to form elastic film portions. The elastic material can play a role in buffering and absorbing vibration. In addition to adhesive bonding, the fixing method can also be hot-melt welding, ultrasonic welding, etc. Besides rubber, the elastic material can also be Oxford cloth, elastomeric plastics, etc.

[0084] Specifically, the elastic film portion can be located on the roller 122 or on the display film 110, and its size does not necessarily cover the entire circle of the roller 122. As long as it covers a section of the arc-shaped area, it can have a shock-absorbing effect. In addition, the shock-absorbing effect is better at the end of the display film 110 rising, at the beginning of the descent, and when the display film 110 unfolds.

[0085] It should be noted that the selection of the flexible material used in the elastic film section is mainly based on considerations of elasticity and extensibility. The flexible material is softer and deforms faster than the display diaphragm 110, and its good extensibility makes it easier to deform and absorb vibration and energy. Assume: the elastic film section is subjected to force F1, and its extensibility deformation is S1; the display diaphragm 110 is subjected to force F2, and its extensibility deformation is S2.

[0086] In the normal viewing position, F1 = F2, S1 > S2. When the display diaphragm 110 is subjected to an external force, F2 > F1, the elastic film is stretched, and S1 is greater than S2. The large deformation of the elastic film absorbs the external force, protecting the display diaphragm 110 from deformation and vibration. During the raising and lowering process of the display diaphragm 110, for example, when it rises, F1 > F2, S1 > S2. The large deformation of the elastic film absorbs the external force, protecting the display diaphragm 110 from deformation and vibration.

[0087] [Support Unit 120]

[0088] The support unit 120 includes a support base 121 and a roller 122. The support base 121 is mainly used to support the roller 122. The roller 122 is rolled on the support base 121. The support base 121 provides 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.

[0089] In some examples, the support 121 may be a metal component, and its material may include one or more of copper, iron, aluminum, tin, and lead.

[0090] In other examples, the support 121 may be made of plastic.

[0091] It should be noted that the specific material of the support base 121 is not limited in this embodiment.

[0092] In some embodiments, the roller 122 and the support base 121 can be connected by a detachable connection or a fixed connection.

[0093] Connections can be made using bolts, clips, or hanging devices. Specific embodiments described in this application will not be limited in detail here.

[0094] In addition, the support unit 120 also includes a crossbeam 123 and a lifting bracket 124. The crossbeam 123 is located at the end of the display film 110 away from the roller 122 to support the end of the display film 110.

[0095] The lifting bracket 124 is a linkage structure. The lifting bracket 124 is located between the crossbeam 123 and the support base 121. The lifting bracket 124 is configured to drive the display film 110 to unfold or retract.

[0096] It should be noted that the specific structure of the crossbeam 123 and the lifting bracket 124 in this application can be described in conjunction with the buffer unit below.

[0097] [Buffer Unit]

[0098] The buffer unit of this application includes a first buffer unit 130 and a second buffer unit 140. The first buffer unit 130 is installed at the lower end of the display film 110 and can effectively improve the shaking caused by vibration at the bottom of the screen. The second buffer unit 140 is installed at the upper end of the display film 110 and can effectively improve the shaking caused by vibration at the top of the display film 110.

[0099] [First Buffer Unit 130]

[0100] It should be noted that both the roller 122 and the support base 121 are located at the bottom of the projection screen 100. Since the bottom of the projection screen 100 is in contact with the ground, the ground vibration caused by people walking around can easily lead to resonance of the projection screen 100. Therefore, the first buffer 131 is located at the bottom, which can play a better buffering role, reduce the shaking of the display film 110, and improve the viewing effect.

[0101] Specifically, in some embodiments, the first buffer 131 can be disposed between the display film 110 and the roller 122. The deformation characteristics of the first buffer 131 can be used to absorb the shaking between the display film 110 and the roller 122 caused by external vibration and energy, thereby reducing the shaking of the display film 110.

[0102] Accordingly, the first buffer 131 can be disposed between the roller 122 and the support 121. The deformation characteristics of the first buffer 131 can be used to absorb the shaking between the roller 122 and the support 121 caused by external vibration and energy, thereby reducing the shaking of the display diaphragm 110.

[0103] Of course, a first buffer 131 is provided between the display diaphragm 110 and the roller 122, and between the roller 122 and the support base 121. This installation method makes the effect of reducing shaking better.

[0104] like Figure 3 and Figure 4 As shown, in some optional embodiments, the roller 122 is provided with an embedding groove 1221, which is provided along the length direction of the roller 122.

[0105] The end of the display diaphragm 110 extends into the embedding groove 1221 through the opening of the embedding groove 1221, and the first buffer 131 is connected between the groove wall of the embedding groove 1221 and the display diaphragm 110.

[0106] It should be noted that the setting of the embedding groove 1221 facilitates the installation of the end of the display film 110, so that the display film 110 is installed in the embedding groove 1221 and rolled around the outer periphery of the roller 122; on the other hand, it facilitates the installation of the first buffer 131. While ensuring the installation strength of the display film 110 and the first buffer 131, the structure is compact and the required cost is low.

[0107] In some embodiments, the opening of the embedding groove 1221 communicates with the outside of the roller 122, and the bottom of the embedding groove 1221 extends toward the center of the roller 122. The length and width of the extension are not limited here.

[0108] Specifically, the width of the groove opening of the embedding groove 1221 is greater than the width of the groove bottom of the embedding groove 1221, and the entire embedding groove 1221 is trumpet-shaped, which has a high aesthetic appeal and good stability.

[0109] It should be noted that the first buffer 131 is always in a stretched state and always has a preload. Whether it is descending, rising, or in the process of lifting or lowering, the diaphragm 110 is always stretched. The initial extension deformation S3 of the first buffer 131, the tension F3 that the first buffer 131 can provide, the tension F1 of the diaphragm 110, and the friction F between the diaphragm 110 and the roller 122 are all shown.

[0110] When the display diaphragm is raised for normal viewing, F1 = F3 + F friction, and the first buffer 131 initially deforms by S3. When the display diaphragm 110 is subjected to an external force, F1 > F3 + F friction, and the first buffer 131 is stretched. At this time, the deformation of the first buffer 131 is greater than the initial deformation S3. The deformation of the first buffer 131 absorbs the external force and protects the display diaphragm 110 from deformation and vibration.

[0111] Continue to refer to Figure 3 and Figure 4 In some optional embodiments, the first buffer unit 130 further includes a fastener 132 and a first reinforcing member 133, at least one of the fastener 132 and the first reinforcing member 133 being a plate-like structure;

[0112] The fixing member 132 is disposed in the embedding groove 1221, the first end of the first buffer member 131 is disposed on the fixing member 132, the bottom ends of the first reinforcing member 133 and the display film 110 are both provided with first mounting holes, and the second end of the first buffer member 131 passes through the first mounting hole of the first reinforcing member 133 and the first mounting hole of the display film 110 in sequence, so that the second end of the first buffer member 131 is fixed on the first reinforcing member 133 and the display film 110.

[0113] It should be noted that the fastener 132 and the first reinforcing member 133 are provided to increase the strength and stability of the first buffer member 131 connected between the embedded groove 1221 and the display diaphragm 110.

[0114] In addition, it should be noted that, considering that the material of the display film 110 is relatively soft, if the first mounting hole is directly opened in the display film 110, the first buffer 131 may easily pull and damage the display film 110 during the tightening process. Therefore, a first reinforcing member 133 is added to the end of the display film 110 so that the first buffer 131 acts on the first reinforcing member 133 during the tightening process, thereby reducing the damage to the display film 110.

[0115] In some embodiments, the first end of the first buffer 131 can be connected to the fixing member 132 in a fixed or detachable manner. The specific installation method is not limited here. Considering the cost, it is generally advisable to make a hole in the fixing member 132 and pass the end of the first buffer 131 through the hole to fix it to the fixing member 132.

[0116] The first mounting hole of the first reinforcing member 133 and the first mounting hole of the display film 110 correspond one-to-one, so that the second end of the first buffer member 131 can pass through in sequence, and then the second end of the first buffer member 131 can be fixed on the first reinforcing member 133 and the display film 110.

[0117] In some alternative embodiments, the roller 122 has two abutting portions 1222, which are spaced apart on the periphery of the roller 122. The abutting portions 1222 extend from the periphery of the roller 122 into the embedding groove 1221 and have a gap with the bottom of the embedding groove 1221. The two abutting portions 1222 form the opening of the embedding groove 1221.

[0118] The fastener 132 is located within the gap and abuts against the end walls of the two abutment portions 1222.

[0119] It should be noted that the abutment part 1222 is designed to interlock with the fixing member 132, thus eliminating the need to drill holes in the groove wall of the embedding groove 1221 to install the fixing member 132, and also providing good stability. On the other hand, it can provide guidance for the rolling of the end of the display film 110, and its arc shape avoids damage to the display film 110.

[0120] Figure 5 This is an assembly diagram from a first perspective showing another type of first buffer unit installed between the roller and the display film in a projection screen provided in an embodiment of this application. Figure 6 This is a schematic diagram of the assembly of another first buffer unit in the projection screen provided in this application embodiment, installed between the roller and the display film, from a second perspective.

[0121] like Figure 5 and Figure 6 As shown, in some embodiments, the first buffer 131 can be a bottom spring, and its bottom end can serve as a fixing member 132. Therefore, the fixing member 132 structure can be reduced, thereby reducing costs.

[0122] It should be noted that, considering the relatively small and complex internal structure of the roller 122 and the limited operating space, the first buffer 131 can be positioned between the support base 121 and the roller 122, as follows:

[0123] For the display diaphragm 110 rising from the ground, the upward and downward movement of the display diaphragm 110 is propelled by the force exerted on the top of the display diaphragm 110 by the lifting bracket 124 behind the display diaphragm 110, which can be raised and lowered. However, due to the shaking caused by the raising and lowering of the lifting bracket 124 (vibration of the slender lifting bracket 124, changes in the upward thrust speed of the lifting bracket 124 due to changes in motor speed, etc.), if the top and bottom are rigidly connected, then the vibration and energy can only be borne by the relatively soft display diaphragm 110. Therefore, this application adds an elastic connection (spring or rubber, etc.) between the roller 122 (including the display diaphragm 110) and the limiting member 135, such as the first buffer member 131, which absorbs the vibration and energy through its elasticity.

[0124] Figure 7 This is an assembly diagram of the first buffer unit in the projection screen provided in this application embodiment, installed between the roller and the support base. Figure 7 As shown, in some optional embodiments, the first buffer unit 130 further includes a floating element 134 and a limiting element 135, the end of the roller 122 is connected to the floating element 134, and the floating element 134 is movably disposed on the support base 121.

[0125] The limiting member 135 is disposed on the support base 121 and located on the floating member 134. One end of the first buffer member 131 is connected to the floating member 134, and the other end of the first buffer member 131 is connected to the limiting member 135, so that the first buffer member 131 is located between the roller 122 and the support base 121.

[0126] It should be noted that the limiting member 135 and the floating member 134 are designed to increase the strength and stability of the first buffer member 131 connected between the roller 122 and the support base 121. This ensures that the roller 122 and the support base 121 are elastically connected, providing a buffering and vibration-absorbing effect. The buffering and vibration-absorbing design at the lower end of the display film 110 effectively improves the shaking problem caused by vibrations at the bottom of the display film 110.

[0127] The force F1 acting on the top of the display film 110 via the lifting bracket 124, and the force F2 pressing down on the top of the display film 110 via the first buffer 131, cause the first buffer 131 to initially extend and deform to S1. In the normal viewing state, F1 = F2, and the first buffer 131 maintains its initial deformation S1. When the display film 110 is subjected to an external force, F2 > F1, and the first buffer 131 is stretched, resulting in an extension deformation of S2, which is greater than S1. This deformation of the first buffer 131 absorbs the external force, protecting the display film 110 from deformation and vibration. During the lifting and lowering process of the display film 110, for example, during upward movement, F1 > F2, and S2 > S1. The deformation of the first buffer 131 absorbs the external force, protecting the display film 110 from deformation and vibration.

[0128] In some embodiments, the limiting member 135 can be connected to the support base 121 in a fixed or detachable manner. The specific installation method is not limited here.

[0129] For example, threaded holes are provided on the limiting member 135 and the support base 121 respectively, and bolt fasteners pass through the threaded holes of the limiting member 135 and the support base 121 in sequence, so that the limiting member 135 is installed on the support base 121.

[0130] In some embodiments, the connection between the roller 122 and the floating member 134 may also be as described above, without further limitation.

[0131] Specifically, the shaft of the roller 122 passes through the floating member 134, which can slide up and down on the support 121. A first buffer member 131 is installed between the floating member 134 and the limiting member 135, which can effectively absorb external forces and vibrations, significantly improve the shaking problem of the display film 110, and improve the stability and service life of the display film 110.

[0132] In some alternative embodiments, the support base 121 is provided with a sliding groove 1211, the opening of the sliding groove 1211 faces the top of the support base 121, and the sliding groove 1211 extends along the moving direction of the display film 110.

[0133] At least one of the floating member 134 and the limiting member 135 is a block structure. The floating member 134 moves within the sliding groove 1211 so that the distance between the limiting member 135 and the floating member 134 is variable.

[0134] It should be noted that the sliding groove 1211 is provided to guide the floating part 134 to move up and down relative to the support base 121, thereby improving the stability of the floating part 134's movement.

[0135] like Figure 7 As shown, X represents the direction of movement of the display diaphragm 110.

[0136] To prevent the floating component 134 from deviating from the sliding groove 1211 during vertical movement, at least two protrusions can be provided within the sliding groove 1211. These protrusions are located on opposite sides of the inner wall of the sliding groove 1211 and extend along the moving direction of the display film 110.

[0137] Correspondingly, at least two grooves are provided on the floating member 134, and the protrusions can be inserted into the grooves to improve the stability of the floating member 134 moving up and down.

[0138] In other embodiments, considering that the space between the floating member 134 and the limiting member 135 is relatively small, in order to improve the buffering effect, there can be multiple first buffer members 131, and multiple first buffer members 131 can be arranged at intervals between the floating member 134 and the limiting member 135.

[0139] It should be noted that the following description mainly focuses on the buffer structure at the upper end of the display diaphragm 110.

[0140] [Second Buffer Unit 140]

[0141] Figure 8 This is a schematic diagram of an assembly from a first perspective showing a second buffer unit installed between a display diaphragm and a crossbeam in a projection screen provided in an embodiment of this application. Figure 9This is an assembly diagram of a second buffer unit installed between a display film and a crossbeam in a projection screen provided in an embodiment of this application, showing a second perspective.

[0142] like Figure 8 and Figure 9 As shown, the support unit 120 also includes a crossbeam 123, which is located at one end of the display film 110 away from the roller 122, to support the end of the display film 110.

[0143] The projection screen 100 also includes a second buffer unit 140, which includes a second buffer member 141 and a second reinforcing member 142. At least part of the second buffer member 141 is a deformable structure. The first end of the second buffer member 141 is disposed on the crossbeam 123. The top ends of the second reinforcing member 142 and the display film 110 are both provided with second mounting holes. The second end of the second buffer member 141 passes through the second mounting hole of the second reinforcing member 142 and the second mounting hole of the display film 110 in sequence, so that the second end of the second buffer member 141 is disposed on the second reinforcing member 142 and the display film 110.

[0144] It should be noted that the second reinforcing member 142 is provided to increase the strength and stability of the second buffer member 141 connected between the crossbeam 123 and the display diaphragm 110.

[0145] In addition, it should be noted that, considering that the material of the display film 110 is relatively soft, if the second mounting hole is directly opened in the display film 110, the second buffer 141 may easily pull and damage the display film 110 during the tightening process. Therefore, a second reinforcing member 142 is added to the end of the display film 110 so that the second buffer 141 acts on the second reinforcing member 142 during the tightening process, thereby reducing the damage to the display film 110.

[0146] like Figure 8 As shown, it should be noted that the actual force exerted by the second buffer 141 is inclined, and the force can be decomposed as follows: Figure 8 On the one hand, it overcomes the weight of the display film 110 by moving upward along the display film 110, and on the other hand, the horizontal pulling force pulls the display film 110 close to the crossbeam 123. At the same time, easy-pull adhesive is also attached between the crossbeam 123 and the display film 110 to prevent the display film 110 from separating horizontally from the crossbeam 123, while allowing a certain amount of sliding in the vertical direction.

[0147] Assuming the coefficient of friction between the display diaphragm 110 and the crossbeam 123 is μ, the initial deformation of the second buffer 141 is S1. When the second buffer 141 is in its normal raised viewing position, F4 = F5*μ + F6, and the second buffer 141 deforms to its initial deformation S1. When the display diaphragm 110 is subjected to an external force, F6 < F4 + F5*μ, and the second buffer 141 is stretched. At this time, the extension deformation S2 of the second buffer 141 is greater than S1. This deformation of the second buffer 141 absorbs the external force, protecting the display diaphragm 110 from deformation and vibration. During the lifting or lowering process of the display diaphragm 110, for example, during lifting, F6 > F5*μ + F4. At this time, the deformation S2 of the second buffer 141 is greater than S1. This deformation of the second buffer 141 absorbs the external force, protecting the display diaphragm 110 from deformation and vibration.

[0148] In some embodiments, the first end of the second buffer 141 can be connected to the crossbeam 123 in a fixed or detachable manner. The specific installation method is not limited here. Considering the cost, it is generally advisable to make a hole in the crossbeam 123 and pass the end of the second buffer 141 through the hole to fix it to the crossbeam 123.

[0149] The second mounting hole of the second reinforcing member 142 corresponds one-to-one with the second mounting hole of the display film 110, so that the second end of the second buffer member 141 can pass through in sequence, and then the second end of the second buffer member 141 can be fixed on the second reinforcing member 142 and the display film 110.

[0150] In some embodiments, the first reinforcing member 133 and the second reinforcing member 142 may have the same structure, for example, both may be reinforcing plates, which are easy to manufacture, have low cost, and are readily available.

[0151] Figure 10 This is a first-view assembly diagram showing another type of second buffer unit installed between the display film and the crossbeam in a projection screen provided in an embodiment of this application. Figure 11 This is an assembly diagram of a second perspective view of a projection screen provided in this application, in which another second buffer unit is installed between the display film and the crossbeam.

[0152] In other embodiments, such as Figure 10 and Figure 11 As shown, the second reinforcing member 142 can be a reinforcing rod. Specifically, a mesh structure is added to the top of the display diaphragm 110, through which the reinforcing rod passes and is connected to the crossbeam 123 via the second buffer member 141.

[0153] Figure 12 This is a first-view assembly diagram showing the installation of a second buffer unit between the display film and the crossbeam in a projection screen according to an embodiment of this application. Figure 13This is an assembly diagram of a second buffer unit installed between a display film and a crossbeam in a projection screen provided in an embodiment of this application, showing a second perspective.

[0154] In other implementations, such as Figure 12 and Figure 13 As shown, the second buffer 141 includes a buffer part 1411 and a stop part 1412. A mounting groove 1231 is provided on the crossbeam 123, and the groove opening of the mounting groove 1231 faces the end of the display diaphragm 110.

[0155] The bottom of the mounting groove 1231 has a mounting opening that extends through the opposite sides of the bottom of the mounting groove 1231. The stop part 1412 abuts against the side of the bottom of the mounting groove 1231 away from the opening of the mounting groove 1231. The first end of the buffer part 1411 is connected to the second reinforcing member 142, and the second end of the buffer part 1411 extends into the mounting opening and is connected to the stop part 1412.

[0156] Specifically, the second buffer 141 can be a base spring, so that the mounting groove 1231 on the crossbeam 123 for fixing the second buffer 141 can be directly molded without machining mounting holes. Its function is similar to that described above, and will not be elaborated further here.

[0157] It should be noted that the display diaphragm 110 is rigidly connected to the crossbeam 123 as a whole, and an elastic buffer structure can be designed between the crossbeam 123 and the lifting bracket 124. The specific structure is as follows:

[0158] Figure 14 This is an assembly diagram of the second buffer unit in the projection screen provided in this application embodiment, installed between the lifting bracket and the crossbeam. Figure 14 As shown, in some optional embodiments, the support unit 120 further includes a lifting support 124 and an adapter 125. The lifting support 124 is a linkage structure and is located between the crossbeam 123 and the support base 121. The lifting support 124 is configured to drive the display film 110 to unfold or retract.

[0159] The crossbeam 123 has a receiving cavity 1232, the adapter 125 is located in the receiving cavity 1232, the lifting bracket 124 is rotatably mounted on the adapter 125, and the second buffer unit 140 includes a third buffer 143, which is located between the adapter 125 and the crossbeam 123 so that the distance between the adapter 125 and the crossbeam 123 along the moving direction of the display diaphragm 110 is variable.

[0160] It should be noted that the second buffer 141 is connected between the crossbeam 123 and the display diaphragm 110.

[0161] The third buffer 143 is connected between the crossbeam 123 and the lifting bracket 124. The deformation characteristics of the third buffer 143 can be used to absorb the shaking between the crossbeam 123 and the lifting bracket 124 caused by external vibration and energy, thereby reducing the shaking of the display diaphragm 110.

[0162] Of course, the second buffer 141 and the third buffer 143 can be set separately or simultaneously. When set simultaneously, they have a better effect in reducing shaking.

[0163] It should be noted that a connector is designed between the third buffer 143 and the lifting bracket 124. The connector is connected to the lifting bracket 124 through a shaft pin, which allows the shaft pin of the lifting bracket 124 to rotate. The threaded fastener is used to adjust the preload of the third buffer 143 to ensure that the third buffer 143 has sufficient lifting force, while ensuring that there is sufficient buffering force between the crossbeam 123 and the connector.

[0164] In some embodiments, considering that the space between the adapter frame 125 and the crossbeam 123 is relatively small, in order to improve the buffering effect, there can be multiple third buffer members 143, and multiple third buffer members 143 can be spaced apart between the adapter frame 125 and the crossbeam 123.

[0165] In some alternative embodiments, at least one of the first buffer 131, the second buffer 141, and the third buffer 143 is a flexible element; or,

[0166] At least one of the first buffer 131, the second buffer 141, and the third buffer 143 is an elastic element.

[0167] It should be noted that at least one of the first buffer 131, the second buffer 141, and the third buffer 143 is made of flexible material, which effectively reduces the shaking of the display film 110 caused by the external environment (such as wind, mechanical vibration, etc.). It can absorb and disperse external forces and vibrations, reduce the direct transmission of these forces to the display film 110, and significantly reduce the shaking amplitude and frequency of the display film 110, thereby improving the stability of the display film 110.

[0168] In some embodiments, at least one of the first buffer 131, the second buffer 141, and the third buffer 143 may be a soft rubber component, for example, made of materials with elastic deformation capabilities such as silicone, polypropylene (PP), or ethylene-vinyl acetate copolymer (EVA). In practical applications, other structures such as the lifting bracket 124, the crossbeam 123, and the roller 122 are typically made of metal to enhance the strength and rigidity of the projection screen 100. For example, these other structures may be made of lightweight and high-rigidity metal materials such as aluminum, magnesium, and titanium.

[0169] Of course, at least one of the first buffer 131, the second buffer 141 and the third buffer 143 is an elastic element. Specifically, it can be a structure made of elastic material, such as a compression spring.

[0170] The projection screen provided in this application embodiment includes a display film having a projection light-receiving surface; a support unit including a support base, a roller, and a lifting bracket, the roller being rotatably mounted on the support base, at least a portion of the display film being rolled up around the outer periphery of the roller, the lifting bracket being movably mounted between the top of the display film and the support base, wherein when the lifting bracket rises, the display film is in an unfolded state, and when the lifting bracket falls, the display film is in a retracted state; and a first buffer unit including a first buffer member, at least a portion of which is a deformable structure, the deformation of which is greater than that of the display film, and the first buffer member being located on at least one of the space between the display film and the roller, and between the roller and the support base.

[0171] By incorporating the first buffer unit and utilizing its material properties, the vibration of the display film caused by external environmental factors (such as wind and mechanical vibration) can be effectively reduced. It absorbs and disperses external forces and vibrations, reducing the direct transmission of these forces to the display film. This significantly reduces the amplitude and frequency of the display film's vibration, thereby improving its stability, reducing image jitter and blurring, providing better image quality and viewing experience, and increasing customer satisfaction. Furthermore, it reduces the direct impact of external forces on the display film material, thus extending its lifespan. In short, by adding the first buffer to form a shock-absorbing structure, external forces and vibrations can be effectively absorbed, significantly improving the vibration problem of the display film, increasing its stability and lifespan, and enhancing the user experience.

[0172] In addition, this application also provides a projection screen 100, including: a display film 110;

[0173] Support base 121 and roller 122, roller 122 is rotatably mounted on support base 121, at least partially showing diaphragm 110 rolled on the outer periphery of roller 122;

[0174] The buffer, at least part of which is a deformable structure, is configured to absorb the sway of the display diaphragm 110 and is located on at least one of the display diaphragm 110 and the roller 122, and between the roller 122 and the support 121.

[0175] By incorporating buffer components and utilizing their material properties, the vibration of the display film caused by external environmental factors (such as wind and mechanical vibration) can be effectively reduced. These buffers absorb and disperse external forces and vibrations, reducing the direct transmission of these forces to the display film. This significantly reduces the amplitude and frequency of the display film's vibration, thereby improving its stability, reducing image jitter and blurring, providing better picture quality and viewing experience, and increasing customer satisfaction. Furthermore, it reduces the direct impact of external forces on the display film material, thus extending its lifespan. In short, by adding buffer components to form a shock-absorbing structure, external forces and vibrations can be effectively absorbed, significantly improving the display film's vibration problem, increasing its stability and lifespan, and enhancing the user experience.

[0176] Figure 15 This is a schematic diagram of the structure of a projection system provided in an embodiment of this application, such as... Figure 15 As shown, this application embodiment also provides a projection system 200, including a projection device 210 and the above-mentioned projection screen 100, wherein the projection device 210 is used to project a projected image onto the projection screen 100.

[0177] The projection system 200 may include a rollable and liftable projection screen 100 and a projection device 210. The rollable and liftable projection screen 100 may be the rollable and liftable projection screen 100 in any of the above embodiments, and the front of the rollable and liftable projection screen 100 may be a Fresnel structure.

[0178] The projection device 210 may include a projection host for emitting a light beam.

[0179] When the projection device 210 is not in use, the display film 110 is rolled up by the control mechanism to reduce the space occupied by the projection screen 100. When the projection device 210 is in use, the display film 110 is stretched out by the control mechanism so that the display film 110 can reflect the light beam emitted by the projector and display the image. When the display film 110 is in the unfolded state, since the guide is pressed against the display film 110 and limits the pitch angle of the display film 110, the guide can guide the display film 110 to the correct position, thereby avoiding problems such as distortion and blurring of the image displayed on the display film 110, thus improving the display effect of the projection screen 100.

[0180] It should be noted that the projection device 210 is equipped with a projector, which can be an ultra-short-throw projector, specifically a DLP (Digital Light Processing) projector. This allows for a shorter distance between the projector and the plane containing the optical film 111, thus achieving a miniaturized design for the entire projection device 210.

[0181] The projector may include: a light source, an optical engine and lens (not shown in the figure), a DMD (Digital Micromirror Device) chip, a control circuit board, an audio processing system, a speaker, a heat dissipation system and a heat sink. The light source is used to emit a light beam to the optical engine. The light source and the lens are both fixedly connected to the optical engine. The DMD chip is located inside the optical engine. The DMD chip, the audio processing system and the heat dissipation system are electrically connected to the control circuit board. The audio processing system is also electrically connected to the speaker, and the heat dissipation system is also electrically connected to the heat sink.

[0182] In this way, the light beam emitted from the light source hits the DMD chip within the optomechanical system. The control circuit board modulates the light beam emitted from the DMD chip, and the modulated beam, carrying the image information output by the control circuit board, is emitted through the lens, and then emitted through the lens to the display film 110 included in the projection screen 100 for display. Additionally, the control circuit board controls the audio processing system to process the audio information output by the control circuit board and amplifies the processed audio information through speakers. During image display and audio amplification, the control circuit board can control the cooling system to drive the heat sink for heat dissipation to prevent high temperatures from affecting the functionality of the components.

[0183] The projection device 210 also includes a storage section 211 for storing the projector and the rollable projection screen 100. The storage section 211 may have a light-transmitting area 2111 and an opening 2112. The light beam emitted from the projector can pass through the light-transmitting area 2111, and the projection screen 100 passes through the opening 2112 and unfolds. Thus, when the projection device 210 is not in use, the projector and the rollable projection screen 100 are stored in the storage section 211, saving space. When the projection device 210 is in use, the projection screen 100 unfolds, and the projector projects a light beam onto the projection screen 100 to display a projected image.

[0184] The vertical distance from the center point of the light-transmitting area 2111 to the plane where the unfolded display film 110 is located is equal to the product of the projection ratio of the projector and the width of the display area on the display film 110. The width of the display area refers to the dimension of the display area along the horizontal direction. This ensures that the light beam emitted by the projector can be accurately projected onto the display area of ​​the display film 110, thereby ensuring the clarity of the image displayed on the display film 110.

[0185] Since the throw ratio is a performance parameter of the projector itself, it is related to the selected projector. Different projectors result in different throw ratios, and consequently, different vertical distances from the center point of the light-transmitting area 2111 to the plane of the unfolded projection screen 100. Therefore, in actual setup, the vertical distance from the center point of the light-transmitting area 2111 to the plane of the unfolded projection screen 100 is calculated using the projector's throw ratio and the width of the display area. This ensures that the beam emitted by the projector can be completely projected onto the display area of ​​the projection screen 100.

[0186] By incorporating the first buffer unit and utilizing its material properties, the vibration of the display film caused by external environmental factors (such as wind and mechanical vibration) can be effectively reduced. It absorbs and disperses external forces and vibrations, reducing the direct transmission of these forces to the display film. This significantly reduces the amplitude and frequency of the display film's vibration, thereby improving its stability, reducing image jitter and blurring, providing better image quality and viewing experience, and increasing customer satisfaction. Furthermore, it reduces the direct impact of external forces on the display film material, thus extending its lifespan. In short, by adding the first buffer to form a shock-absorbing structure, external forces and vibrations can be effectively absorbed, significantly improving the vibration problem of the display film, increasing its stability and lifespan, and enhancing the user experience.

[0187] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0188] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0189] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A projection screen, characterized in that, include: The display film has a projection light-receiving surface; The support unit includes a support base, a roller, and a lifting bracket. The roller is rotatably mounted on the support base, and at least a portion of the display film is rolled around the outer periphery of the roller. The lifting bracket is movably mounted between the top of the display film and the support base. When the lifting bracket rises, the display film is in an unfolded state, and when the lifting bracket falls, the display film is in a retracted state. A first buffer unit, comprising a first buffer element, at least a portion of which is a deformable structure, wherein the deformation of the first buffer element is greater than the deformation of the display film, and the first buffer element is located on at least one of the display film and the roller, and the roller and the support base.

2. The projection screen according to claim 1, characterized in that, The roller is provided with an embedding groove, which is provided along the length direction of the roller; The end of the display film extends into the embedding groove through the opening of the embedding groove, and the first buffer is connected between the groove wall of the embedding groove and the display film.

3. The projection screen according to claim 2, characterized in that, The first buffer unit further includes a fixing member and a first reinforcing member, wherein at least one of the fixing member and the first reinforcing member is a plate-like structure; The fixing member is disposed in the embedding groove, the first end of the first buffer member is disposed on the fixing member, the bottom ends of the first reinforcing member and the display film are both provided with first mounting holes, and the second end of the first buffer member passes through the first mounting hole of the first reinforcing member and the first mounting hole of the display film in sequence, so that the second end of the first buffer member is fixed on the first reinforcing member and the display film.

4. The projection screen according to claim 3, characterized in that, The roller has two abutting portions, which are spaced apart on the periphery of the roller. The abutting portions extend from the periphery of the roller into the embedding groove and have a gap with the bottom of the embedding groove. The two abutting portions form the opening of the embedding groove. The fastener is located within the gap and abuts against the end walls of the two abutting portions.

5. The projection screen according to claim 1, characterized in that, The first buffer unit further includes a floating component and a limiting component. The end of the roller is connected to the floating component, and the floating component is movably disposed on the support base. The limiting member is disposed on the support base and located on the floating member. One end of the first buffer member is connected to the floating member, and the other end of the first buffer member is connected to the limiting member, so that the first buffer member is located between the roller and the support base.

6. The projection screen according to claim 5, characterized in that, The support base is provided with a sliding groove, the opening of the sliding groove faces the top of the support base, and the sliding groove extends along the moving direction of the display film; At least one of the floating component and the limiting component is a block structure, and the floating component moves within the sliding groove so that the distance between the limiting component and the floating component is variable.

7. The projection screen according to any one of claims 1-6, characterized in that, The support unit also includes a crossbeam located at the end of the display film opposite to the roller to support the end of the display film; The projection screen further includes a second buffer unit, which includes a second buffer member and a second reinforcing member. At least part of the second buffer member is a deformable structure. The first end of the second buffer member is disposed on the crossbeam. The top ends of the second reinforcing member and the display film are both provided with second mounting holes. The second end of the second buffer member passes through the second mounting hole of the second reinforcing member and the second mounting hole of the display film in sequence, so that the second end of the second buffer member is disposed on the second reinforcing member and the display film.

8. The projection screen according to claim 7, characterized in that, The second buffer includes a buffer part and a stop part. A mounting groove is formed on the crossbeam, and the opening of the mounting groove faces the end of the display film. The bottom of the mounting groove has a mounting opening that extends through the opposite sides of the bottom of the mounting groove. The stop part abuts against the side of the bottom of the mounting groove away from the opening of the mounting groove. The first end of the buffer part is connected to the second reinforcing member, and the second end of the buffer part extends into the mounting opening and is connected to the stop part.

9. The projection screen according to claim 7, characterized in that, The support unit also includes an adapter frame. The lifting support is a linkage structure. The lifting support is located between the crossbeam and the support base. The lifting support is configured to drive the display film to unfold or retract. The crossbeam has a receiving cavity, the adapter frame is located in the receiving cavity, the lifting bracket is rotatably mounted on the adapter frame, and the second buffer unit includes a third buffer member located between the adapter frame and the crossbeam, so that the distance between the adapter frame and the crossbeam along the moving direction of the display film is variable.

10. The projection screen according to claim 9, characterized in that, At least one of the first buffer, the second buffer, and the third buffer is a flexible element; or, At least one of the first buffer, the second buffer, and the third buffer is an elastic element.

11. The projection screen according to any one of claims 1-6, characterized in that, At least one of the upper and lower ends of the display film has an elastic thin film portion, and the deformation of the elastic thin film portion is greater than the deformation of the display film.

12. A projection screen, characterized in that, include: Display membrane; A support base and a roller, wherein the roller is rotatably mounted on the support base, and at least a portion of the display film is rolled onto the outer periphery of the roller; A buffer, at least a portion of which is a deformable structure, is configured to absorb the amount of sway of the display film, and is located on at least one of the display film and the roller, and the roller and the support.

13. A projection system, characterized in that, It includes a projection device and a projection screen as described in any one of claims 1-12, wherein the projection device is used to project a projected image onto the projection screen.

Images