Projection screen and projection system

Abstract

A projection screen (100) and a projection system (200). The projection screen (100) comprises: a display film (110), a support unit (120) and at least one buffer unit (130, 140, 150, 160). The display film (110) has a projection light-receiving surface. The support unit (120) comprises a support base (121), a roller (122), a cross beam (123) and a lifting support (124), wherein the roller (122) is rotatably connected to the support base (121), and the roller (122) is connected to one end of the display film (110); the cross beam (123) is connected to the other end of the display film (110); and the lifting support (124) is connected to both the cross beam (123) and the support base (121). One buffer unit (130, 140, 150, 160) is located between a first component and a second component which are connected to each other; the first component and the second component are two of the display film (110), the support base (121), the roller (122), the cross beam (123) and the lifting support (124). The modulus of elasticity of at least part of each buffer unit (130, 140, 150, 160) is less than the modulus of elasticity of the display film (110). The projection screen (100) can effectively absorb external forces and vibrations, alleviating the problem of wobbling in the display film (110), improving the stability and prolonging the service life of the display film (110), and also improving the user experience.

Description

Projection screen and projection system

[0001] The present application claims priority to the Chinese patent application No. 202410832666.7, filed on June 25, 2024, and entitled "Projection screen and projection system", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of projection technology, in particular to a projection screen and a projection system. BACKGROUND

[0003] The lifting and curling type projection screen is a main direction of differentiation between projection display and traditional flat display due to its small size, convenient transportation and installation, and good fusion with home environment.

[0004] At present, the display film of the lifting display film will shake when subjected to external force and vibration of the external environment during lifting and unrolling for viewing, resulting in distortion of the projection display picture and affecting the viewing effect of the user.

[0005] DISCLOSURE

[0006] In one aspect, the present application provides a projection screen, comprising: a display film, a support unit and at least one buffer unit; the display film has a projection light receiving surface; the support unit comprises a support seat, a roller and a lifting support; the roller is rotationally connected with the support seat, and the roller is connected with one end of the display film; the cross beam is connected with the other end of the display film; the lifting support is connected with the cross beam and the support seat respectively; one of the buffer units is located between the first component and the second component connected with each other, and the first component and the second component are two of the display film, the support seat, the roller, the cross beam and the lifting support; wherein the elastic modulus of at least part of each buffer unit is less than the elastic modulus of the display film.

[0007] In another aspect, the present application provides a projection system, comprising a projection device and the projection screen described in the present application, wherein the projection device is used to project a projection picture to the projection screen. BRIEF DESCRIPTION OF DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present application or the implementation manners in the related art, the drawings needed to be used in the embodiment or related art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0009] Fig. 1 is a structural schematic view of the projection screen provided by the embodiment of the present application;

[0010] Fig. 2 is an assembly diagram of a display film and a roller in a projection screen according to an embodiment of the present application;

[0011] Fig. 3 is an assembly diagram of a first buffer unit installed between a roller and a display film in a projection screen according to an embodiment of the present application from a first perspective;

[0012] Fig. 4 is an enlarged view of a partial structure at A in Fig. 3;

[0013] Fig. 5 is an assembly diagram of the first buffer unit installed between the roller and the display film in the projection screen according to an embodiment of the present application from a second perspective;

[0014] Fig. 6 is an assembly diagram of another first buffer unit installed between the roller and the display film in the projection screen according to an embodiment of the present application from the first perspective;

[0015] Fig. 7 is an assembly diagram of the another first buffer unit installed between the roller and the display film in the projection screen according to an embodiment of the present application from the second perspective;

[0016] Fig. 8 is an assembly diagram of the first buffer unit installed between the roller and a support seat in the projection screen according to an embodiment of the present application;

[0017] Fig. 9 is an assembly diagram of a second buffer unit installed between a display film and a cross beam in the projection screen according to an embodiment of the present application from the first perspective;

[0018] Fig. 10 is an assembly diagram of the second buffer unit installed between the display film and the cross beam in the projection screen according to an embodiment of the present application from the second perspective;

[0019] Fig. 11 is an assembly diagram of another second buffer unit installed between the display film and the cross beam in the projection screen according to an embodiment of the present application from the first perspective;

[0020] Fig. 12 is an assembly diagram of the another second buffer unit installed between the display film and the cross beam in the projection screen according to an embodiment of the present application from the second perspective;

[0021] Fig. 13 is an assembly diagram of still another second buffer unit installed between the display film and the cross beam in the projection screen according to an embodiment of the present application from the first perspective;

[0022] Fig. 14 is an assembly diagram of the still another second buffer unit installed between the display film and the cross beam in the projection screen according to an embodiment of the present application from the second perspective;

[0023] Fig. 15 is an assembly diagram of the second buffer unit installed between a lifting support and the cross beam in the projection screen according to an embodiment of the present application;

[0024] FIG. 16 is a structural schematic diagram of a projection system provided by an embodiment of the present application. DETAILED DESCRIPTION

[0025] To make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application.

[0026] In the related art, when the lifting display film is lifted and unfolded for viewing, external forces and vibrations (such as walking, wind, equipment operation, etc.) from the external environment are directly transmitted to the display film, causing the display film to have obvious shaking. The shaking of the display film is very unfavorable for projection display, which can cause the picture to be distorted, affect the viewing effect of the user, and reduce the user satisfaction.

[0027] In addition, in order to realize large-size display, the size of the display film needs to be increased, and in order to reduce the waiting time, the lifting speed of the display film needs to be increased, so as to realize the rapid unfolding or storage of the display film. These improvements will exacerbate the shaking problem of the display film.

[0028] In order to overcome the defects in the prior art, the projection screen and the projection system provided by the present application can effectively reduce the shaking of the display film caused by the external environment (such as wind, mechanical vibration, etc.), can absorb and disperse external forces and vibrations, reduce the direct transmission of these forces to the display film, significantly reduce the shaking amplitude and frequency of the display film, thereby improving the stability of the display film, reducing picture jitter and blur, providing better picture quality and viewing experience, and improving customer satisfaction. In addition, the direct impact of external forces on the material of the display film can be reduced, thereby prolonging the service life of the display film.

[0029] The content of the present application will be described in detail below with reference to the drawings, so that those skilled in the art can more clearly and specifically understand the content of the present application.

[0030] FIG. 1 is a structural schematic diagram of a projection screen provided by an embodiment of the present application, FIG. 2 is an assembly schematic diagram of a display film and a roller in the projection screen provided by an embodiment of the present application, FIG. 3 is an assembly schematic diagram of a first viewing angle of a first buffer unit installed between the roller and the display film in the projection screen provided by an embodiment of the present application, FIG. 4 is an enlarged view of a partial structure at A in FIG. 3, and FIG. 5 is an assembly schematic diagram of a second viewing angle of the first buffer unit installed between the roller and the display film in the projection screen provided by an embodiment of the present application.

[0031] In one aspect, the embodiment of the present application provides a projection screen 100. As shown in FIG. 1, in some embodiments, the projection screen 100 comprises a display film 110, a support unit 120 and at least one buffer unit; the display film 110 has a projection light receiving surface; the support unit 120 comprises a support base 121, a roller 122, a cross beam 123 and a lifting support 124; the roller 122 is rotationally connected with the support base 121, and the roller 122 is connected with one end of the display film 110; the cross beam 123 is connected with the other end of the display film 110; and the lifting support 124 is connected with the cross beam 123 and the support base 121 respectively. As shown in FIG. 3, the projection screen 100 further comprises at least one buffer unit, one buffer unit is located between the first component and the second component connected with each other, and the first component and the second component are two of the display film 110, the support base 121, the roller 122, the cross beam 123 and the lifting support 124; alternatively, the at least one buffer unit is located between any two of the display film 110, the roller 122, the lifting support 124 and the support base 121 connected with each other. In each buffer unit, at least part of the elastic modulus is less than the elastic modulus of the display film 110.

[0032] Through the above arrangement, by arranging the at least one buffer unit, the shaking of the display film 110 caused by external environment (such as wind, mechanical vibration, etc.) can be effectively reduced, the external force and vibration can be absorbed and dispersed, the force is directly transmitted to the display film 110, the shaking amplitude and frequency of the display film 110 are significantly reduced, thereby improving the stability of the display film 110, reducing the picture shaking and blurring, providing better picture quality and viewing experience, and improving customer satisfaction; in addition, the direct impact of external force on the material of the display film 110 can be reduced, thereby prolonging the service life of the display film 110.

[0033] In the projection screen 100 of the embodiment, the reasons that can cause the display film 110 to shake and affect the picture quality mainly include two aspects. The first aspect is that when the ground or the desktop where the support base 121 is located vibrates, the vibration is transmitted to the display film 110 through the roller 122 or the lifting support 124, causing the display film 110 to shake. The second aspect is that the display film 110 is shaken by wind force or accidental touch.

[0034] In the embodiment, the buffer unit is arranged between any two of the display film 110, the roller 122, the lifting support 124 and the support base 121 connected with each other, which can block multiple different transmission paths of vibration transmission to the display film 110, and can absorb and offset the vibration energy when the display film 110 shakes itself, thereby reducing the shaking amplitude and frequency of the display film 110.

[0035] In some embodiments, the number of buffer units can be one, two, three, etc. The number of buffer units arranged between any two of the mutually connected ones can also be one, two, three, etc. Moreover, after buffer units are arranged between any two of the mutually connected ones, buffer units can still be arranged between other two of the mutually connected ones. For example, buffer units are arranged between the display film 110 and the roller 122, and buffer units are also arranged between the roller 122 and the support seat 121.

[0036] In some embodiments, at least one buffer unit is arranged between the display film 110 and the roller 122. The buffer unit can be a flexible material or an elastic material. The buffer unit can offset and absorb the vibration energy transmitted from the roller 122 to the display film 110 by its elastic deformation characteristics, or offset and absorb the vibration energy of the display film 110 itself.

[0037] In some embodiments, at least one buffer unit is arranged between the roller 122 and the support seat 121. The buffer unit can be a flexible material or an elastic material. The buffer unit can offset and absorb the vibration energy transmitted from the support seat 121 to the roller 122, thereby reducing the vibration energy transmitted from the roller 122 to the display film 110, or offset and absorb the vibration energy transmitted from the display film 110 to the roller 122.

[0038] In some embodiments, at least one buffer unit is arranged between the display film 110 and the lifting bracket 124. The buffer unit can be a flexible material or an elastic material. The buffer unit can offset and absorb the vibration energy transmitted from the lifting bracket 124 to the display film 110 by its elastic deformation characteristics, or offset and absorb the vibration energy of the display film 110 itself.

[0039] In some embodiments, at least one buffer unit is arranged between the lifting bracket 124 and the support seat 121. The buffer unit can be a flexible material or an elastic material. The buffer unit can offset and absorb the vibration energy transmitted from the support seat 121 to the lifting bracket 124 by its elastic deformation characteristics, thereby reducing the vibration energy transmitted from the lifting bracket 124 to the display film 110, or offset and absorb the vibration energy transmitted from the display film 110 to the lifting bracket 124.

[0040] The elastic modulus is the ability of a material to resist elastic deformation. The greater the modulus, the more difficult it is to stretch or compress. In this embodiment, the elastic modulus of the buffer unit is small. Compared with the display film 110, the buffer unit is more easily stretched or compressed and elastically deformed, thereby effectively offsetting and absorbing the vibration energy.

[0041] In some embodiments, the display film 110 is made of polyethylene terephthalate (PET). PET is made of terephthalic acid (TPA) and ethylene glycol (EG) through polycondensation reaction, and is a thermoplastic polyester engineering plastic with high transparency, high surface hardness, good wear resistance, and high tensile strength. The display film 110 made of PET has strong surface designability, can design micro-optical structures on the surface, improve the uniform scattering effect of projected light, expand the viewing angle, improve the screen brightness gain, and reduce the reflection of ambient light, and improve the contrast. However, compared with other materials, the rigidity of PET is relatively large, and the elasticity and ductility are limited, and the damping effect is limited. The damping unit provided by the present application is used to buffer and absorb energy of the display film 110, which is beneficial to improve the damping effect of the display film 110, so that the display film 110 can play the advantages of PET material and will not be affected by large vibration.

[0042] As shown in FIG. 2 or FIG. 3, in some embodiments, the display film 110 includes an unfolded state and a storage state. In the unfolded state, the two ends of the display film 110 are supported by the lifting bracket 124 to be far away from each other. In the storage state, the display film 110 is wound on the roller 122. Through the above arrangement, the display film 110 can be wound and stored and unfolded by using the roller 122 and the lifting bracket 124.

[0043] As shown in FIG. 1, in some embodiments, the projection screen 100 includes a display film 110, the display film 110 has a projection light receiving surface; a bracket unit 120, the bracket unit 120 includes a support seat 121, a roller 122, and a lifting bracket, the roller 122 is rotationally arranged on the support seat 121, at least part of the display film 110 is wound on the outer periphery of the roller 122, the lifting bracket is movably arranged between the top end of the display film 110 and the support seat 121, when the lifting bracket is raised, the display film 110 is in an unfolded state, and when the lifting bracket is lowered, the display film 110 is in a storage state.

[0044] Further comprising a first damping unit 130, the first damping unit 130 includes a first damping member 131, at least part of the first damping member 131 is a deformation structure, the deformation amount of the first damping member 131 is greater than the deformation amount of the display film 110, and the first damping member 131 is located on at least one of the display film 110 and the roller 122, the roller 122 and the support seat 121. It can also be described that the first damping member 131 is located between the display film 110 and the roller 122, and / or the first damping member 131 is located between the roller 122 and the support seat 121.

[0045] Through the above arrangement, through the arrangement of the first buffering unit 130, by using the material characteristics of the first buffering piece 131, the shaking of the display film 110 caused by external environment (such as wind, mechanical vibration, etc.) can be effectively reduced, the external force and vibration can be absorbed and dispersed, the force is directly transmitted to the display film 110, the shaking amplitude and frequency of the display film 110 can be significantly reduced, thereby improving the stability of the display film 110, reducing the picture shaking and blurring, providing better picture quality and viewing experience, and improving customer satisfaction; in addition, the direct impact of external force on the material of the display film 110 can be reduced, thereby prolonging the service life of the display film 110. That is, by increasing the first buffering piece 131 to form a buffering vibration absorption structure, the external force and vibration can be effectively absorbed, the shaking problem of the display film 110 can be significantly improved, the stability and service life of the display film 110 can be improved, and the user's use experience can be improved.

[0046] As shown in FIG. 3, in some embodiments, the at least one buffering unit includes a first buffering unit 130, which is located between the display film 110 and the roller 122 and is connected with the display film 110 and the roller 122 respectively.

[0047] Through the arrangement of the first buffering unit 130 between the display film 110 and the roller 122, the vibration transmission between the roller 122 and the display film 110 can be effectively reduced.

[0048] Since the faster the display film 110 rises, the more obvious the shaking is, by increasing the first buffering unit 130, the buffering force can be absorbed, which can be specifically manifested as: the shaking degree of the display film 110 after increasing the first buffering unit 130 and realizing rising in a first time is similar to the shaking degree of the display film 110 without increasing the first buffering unit 130 and completing rising in a second time, wherein the length of the first time is less 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., that is, the shaking degree of the display film 110 after increasing the first buffering unit 130 and realizing rising in 30 seconds is similar to the shaking degree of the display film 110 without increasing the first buffering unit 130 and completing rising in 50 seconds.

[0049] In some embodiments, the projection screen 100 provided by the application is a screen that can be rolled up and lifted.

[0050] In addition, the projection screen 100 provided by the embodiments of the present application can be a pull-down projection screen 100, or can be a pull-up projection screen 100. When the projection screen 100 is a pull-down projection screen 100, the user can pull the projection screen 100 out of the roller 122 from top to bottom after the projection screen 100 is set at a preset position. When the projection screen 100 is a pull-up projection screen 100, the user can pull the projection screen 100 out of the roller 122 from bottom to top after the projection screen 100 is set at a preset position. In this case, the pulled projection screen 100 can be fixed at the preset position (for example, a hook on a wall, or the projection screen 100 and the support structure layer are fixed by the lifting support 124).

[0051] In some embodiments, the front side of the display film 110 can be used to display a projection picture. The display film 110 can include an unfolded state and a storage state. The unfolded state refers to a state in which the display film 110 is unfolded outside the roller 122 without being wound on the roller 122, and the storage state refers to a state in which the display film 110 is wound on the roller 122. The display film 110 can also be partially wound on the roller 122.

[0052] In some embodiments, when the display film 110 is stored, the display film 110 can be wound on the roller 122.

[0053] The material of the display film 110 can include polyethylene terephthalate. When the display film 110 is wound on the roller 122, the display film 110 is wound on the roller 122 in multiple layers.

[0054] As shown in FIG. 2, in some embodiments, the first buffer unit 140 is a strip-shaped structure made of an elastic material, one side of the first buffer unit 140 is fixedly connected to the end of the display film 110, and the other side is fixedly connected to the side surface of the roller 122. In this embodiment, the first buffer unit 140 in the strip-shaped structure can also be described as an elastic film part.

[0055] Through the above arrangement, the first buffer unit 140 fixedly connected to the end of the display film 110 can reduce the vibration transmission between the roller 122, the cross beam 123 and the display film 110, and reduce the vibration degree of the display film 110.

[0056] In some embodiments, at least one of the upper and lower ends of the display film 110 has an elastic film part, and the elastic modulus of the elastic film part is less than the elastic modulus of the display film 110. Alternatively, the deformation amount of the elastic film part is greater than the deformation amount of the display film 110.

[0057] In some embodiments, a thin elastic film material is arranged on the upper and lower ends of the display film 110, such as a thin rubber adhered by glue, to form an elastic film part. The elastic material can serve as a shock-absorbing buffer. In addition to glue, the fixing method can also use hot melting, ultrasonic welding, etc. In addition to rubber, the elastic material can also use oxford cloth, elastomer plastic, etc.

[0058] In some embodiments, the elastic film part can be located on the roller 122 or on the display film 110. The size of the elastic film part does not necessarily cover the entire circumference of the roller 122, but only needs to cover an arc-shaped area to have a shock-absorbing effect. In addition, the shock-absorbing effect is better when the display film 110 is raised at the end, lowered at the beginning, or unfolded.

[0059] In this embodiment, the flexible material used in the elastic film part is mainly selected based on elasticity and ductility. The flexible material is softer than the display film 110 and deforms first, and has good ductility and is easier to deform to absorb vibration and energy. Suppose that the elastic film part is subjected to a force F1 and deforms by S1, and the display film 110 is subjected to a force F2 and deforms by S2.

[0060] In the normal raised viewing state, F1=F2 and S1>S2. When the display film 110 is subjected to an external force, F2>F1, the elastic film part is elongated, and S1 is greater than S2. The elastic film part deforms greatly to absorb the external force and protect the display film 110 from deforming and vibrating. During the lifting process of the display film 110, such as lifting, F1>F2 and S1>S2. The elastic film part deforms greatly to absorb the external force and protect the display film 110 from deforming and vibrating.

[0061] In some embodiments, the support unit 120 includes a support seat 121 and a roller 122. The support seat 121 is mainly used to support the roller 122. The roller 122 is rotatably installed on the support seat 121. The support seat 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 wound around the outer periphery of the roller 122.

[0062] In some embodiments, the support seat 121 can be a metal part. The material of the support seat 121 can include one or more of copper, iron, aluminum, tin, and lead.

[0063] In some embodiments, the support seat 121 can be made of plastic. The material of the support seat 121 can also be other materials, which are not limited in the present embodiment.

[0064] In some embodiments, the roller 122 and the support seat 121 can be connected in a detachable or fixed manner, such as by bolts, buckles, or hanging connections. In particular, the present embodiment is not limited in this regard.

[0065] In addition, the support unit 120 further comprises a crossbeam 123 and a lifting support 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. The lifting support 124 is a connecting rod structure, which is located between the crossbeam 123 and the support base 121 and is configured to drive the display film 110 to unfold or be stored.

[0066] As shown in FIG. 3 and FIG. 9, in some embodiments, the buffer unit comprises a first buffer unit 130 and a third buffer unit 150. The first buffer unit 130 is installed at the lower end of the display film 110, which can effectively improve the shaking caused by the vibration at the bottom of the screen. The third buffer unit 150 is installed at the upper end of the display film 110, which can effectively improve the shaking caused by the vibration at the top of the display film 110.

[0067] In some embodiments, the roller 122 and the support base 121 are both located at the bottom end of the projection screen 100. Because the bottom end of the projection screen 100 is in contact with the ground, the ground vibration caused by the movement of people is likely to cause resonance of the projection screen 100. Therefore, the first buffer 131 located at the bottom end can have a better buffering effect, reduce the shaking of the display film 110, and improve the viewing effect.

[0068] As shown in FIG. 3 or FIG. 6, in some embodiments, the first buffer 131 can be arranged between the display film 110 and the roller 122. The deformation characteristics of the first buffer 131 can be utilized to absorb the shaking between the display film 110 and the roller 122 caused by external vibration and energy, so that the shaking of the display film 110 is reduced.

[0069] As shown in FIG. 8, in some embodiments, the at least one buffer unit comprises a second buffer unit 140. The second buffer unit 140 is located between the roller 122 and the support base 121 and is connected with the roller 122 and the support base 121, respectively. The buffering characteristics of the second buffer unit 140 can be utilized to absorb the shaking between the roller 122 and the support base 121 caused by external vibration and energy, so that the shaking of the display film 110 is reduced.

[0070] The first buffer unit 130 is arranged between the display film 110 and the roller 122, and the second buffer unit 140 is arranged between the roller 122 and the support base 121. Such an arrangement can better reduce the shaking.

[0071] As shown in FIG. 3 or FIG. 5, in some embodiments, the roller 122 is provided with an embedded groove 1221 arranged along the length direction of the roller 122. The end of the display film 110 extends into the embedded groove 1221 through the slot of the embedded groove 1221.

[0072] The first buffering unit 130 comprises a plurality of first buffering pieces 131, a first end of each first buffering piece 131 is connected with the slot wall of the embedding slot 1221, and a second end of each first buffering piece 131 is connected with the end of the display film 110.

[0073] The embedding slot 1221 is arranged to facilitate the installation of the end of the display film 110, so that the display film 110 is installed in the embedding slot 1221 and wound around the outer periphery of the roller 122, and to facilitate the installation of the first buffering piece 131, so that the installation strength of the display film 110 and the first buffering piece 131 is ensured, the structure is compact, and the required cost is low.

[0074] As shown in FIG. 4, in some embodiments, the slot opening of the embedding slot 1221 communicates with the outside of the roller 122, and the slot bottom of the embedding slot 1221 extends towards the center of the roller 122, and the length and width of the extension are not limited herein.

[0075] As shown in FIG. 5 or 7, in some embodiments, the slot opening width of the embedding slot 1221 is greater than the slot bottom width of the embedding slot 1221, and the entire embedding slot 1221 is trumpet-shaped, which is higher in aesthetic degree and better in stability.

[0076] The first buffering piece 131 is always in a stretched state and always has a pre-tightening force, so that the display film 110 is always pulled tight by the first buffering piece 131, regardless of whether the display film 110 is in a wound storage state, an unfolded state, or a lifting switching process. As shown in FIG. 3, the first buffering piece 131 has an initial extension deformation, the first buffering piece 131 can provide a pulling force F3, the display film 110 has a pulling force F1, and the display film 110 and the roller 122 have a friction force F.

[0077] In a normal lifting viewing state, F1=F3+Ffriction, the first buffering piece 131 has an initial deformation; when the display film 110 is subjected to an external force, F1>F3+Ffriction, the first buffering piece 131 is elongated, and at this time, the deformation of the first buffering piece 131 is greater than the initial deformation, so that the external force is absorbed through the deformation of the first buffering piece 131, and the display film 110 is protected from deformation and vibration.

[0078] As shown in FIG. 3 or 4, in some embodiments, the first buffering unit 130 further comprises a first fixing piece 132, the first fixing piece 132 is located in the embedding slot 1221, a first end of each first buffering piece 131 is arranged on the fixing piece 132, and a second end is connected with the end of the display film 110. Through the above arrangement, the first buffering piece 131 can be fixedly connected in the embedding slot 1221 through the first fixing piece 132, and the connection between the first buffering piece 131 and the roller 122 is realized.

[0079] As shown in FIG. 3, in some embodiments, the first buffering unit 130 further comprises a first reinforcing piece 133 connected with the end of the display film 110, and the second end of the first buffering piece 131 is connected with the first reinforcing piece 133. Through the connection of the first buffering piece 131 and the first reinforcing piece 133, the first buffering piece 131 can be connected with the end of the display film 110.

[0080] Considering that the material of the display film 110 is soft, if the first buffering piece 131 is directly connected with the display film 110, the first buffering piece 131 is easy to pull the display film 110 in the process of tensioning, and thus the display film 110 is damaged. Therefore, the first reinforcing piece 133 is added at the end of the display film 110, so that the first buffering piece 131 acts on the first reinforcing piece 133 in the process of tensioning, and the damage to the display film 110 is reduced.

[0081] As shown in FIG. 3, in some embodiments, the first reinforcing piece 133 and the end of the display film 110 are respectively provided with first mounting holes, and the second end of the first buffering piece 131 sequentially passes through the first mounting hole of the first reinforcing piece 133 and the first mounting hole of the display film 110, so that the second end of the first buffering piece 131 is fixed on the first reinforcing piece 133 and the display film 110.

[0082] Through the above arrangement, the first buffering piece 131 can be fitted in the first mounting holes (not shown in the figure) of the first reinforcing piece 133 and the display film 110, so as to realize the force connection of the first buffering piece 131 and the display film 110.

[0083] As shown in FIG. 3 or FIG. 5, in some embodiments, the first buffering unit 130 further comprises a first fixing piece 132 and a first reinforcing piece 133, and at least one of the first fixing piece 132 and the first reinforcing piece 133 is a plate structure.

[0084] The first fixing piece 132 is arranged in the embedding groove 1221, the first end of the first buffering piece 131 is arranged on the first fixing piece 132, the first reinforcing piece 133 and the bottom end of the display film 110 are respectively provided with first mounting holes, and the second end of the first buffering piece 131 sequentially passes through the first mounting hole of the first reinforcing piece 133 and the first mounting hole of the display film 110, so that the second end of the first buffering piece 131 is fixed on the first reinforcing piece 133 and the display film 110.

[0085] In this embodiment, the first fixing piece 132 and the first reinforcing piece 133 are arranged to increase the strength and stability of the connection of the first buffering piece 131 between the embedding groove 1221 and the display film 110.

[0086] In addition, considering that the material of the display film 110 is soft, if the first mounting hole is directly opened on the display film 110, the first buffer 131 is easy to pull the display film 110 during the tensioning process, and thus is damaged. Therefore, the first reinforcing piece 133 is added at the end of the display film 110, so that the first buffer 131 acts on the first reinforcing piece 133 during the tensioning process, and the damage to the display film 110 is reduced.

[0087] In some embodiments, the first end of the first buffer 131 can be connected to the first fixing piece 132 in a fixed or detachable manner. The specific mounting manner is not limited here too much. For example, a hole is opened on the first fixing piece 132, and the end of the first buffer 131 passes through the hole to be fixed on the first fixing piece 132.

[0088] In some embodiments, the first mounting hole of the first reinforcing piece 133 and the first mounting hole of the display film 110 one-to-one correspond, so that the second end of the first buffer 131 passes through in turn, and then the second end of the first buffer 131 can be fixed on the first reinforcing piece 133 and the display film 110.

[0089] As shown in FIG. 3 or 6, in some embodiments, the roller 122 includes a roller body 1223 and two abutting portions 1222, the two abutting portions 1222 are arranged at intervals on the circumferential side of the roller 122, and the roller body 1223 has an embedding groove 1221; the abutting portion 1222 extends from the circumferential side of the roller 122 into the embedding groove 1221, and has a gap between the abutting portion 1222 and the groove bottom of the embedding groove 1221, and the two abutting portions 1222 form a slot of the embedding groove 1221.

[0090] Through the arrangement of the abutting portion 1222, on the one hand, the abutting portion 1222 and the fixing piece 132 can form a mutual clamping state, and there is no need to punch holes on the groove wall of the embedding groove 1221 to install the fixing piece 132, and the stability is better; on the other hand, the end of the display film 110 can be provided with a guide for winding, and the arc-shaped arrangement can avoid damaging the display film 110.

[0091] In some embodiments, the first fixing piece 132 is located in the gap, and abuts against the end wall of at least one of the two abutting portions 1222 facing the axis of the roller 122. The two abutting portions 1222 can provide support for the first fixing piece 132 facing the axis of the roller 122, and thus realize the tensioning installation of the first buffer 131.

[0092] As shown in FIG. 3 and FIG. 4, in some embodiments, the first fixing member 132 is a plate structure extending parallel to the axis of the drum 122, and the cross-sectional shape of the first fixing member 132 is T-shaped, the first fixing member 132 including a transverse plate portion 1321 arranged perpendicular to the direction of the first buffer member 131, and a longitudinal plate portion 1322 arranged parallel to the direction of the first buffer member 131, the longitudinal plate portion 1322 being connected perpendicularly in the middle of the transverse plate portion 1321 to form a T-shaped plate member.

[0093] The transverse plate portion 1321 straddles the two abutting portions 1222 of the embedding groove 1221, and the longitudinal plate portion 1322 extends into the space between the two abutting portions 1222 and is connected to the first end of the first buffer member 131.

[0094] In some embodiments, the number of first buffer members 131 is multiple, and the multiple first buffer members 131 are arranged spaced apart along the axial direction of the drum 122, and the longitudinal plate portion 1322 of the fixing member 132 also extends along the axial direction of the drum 122, and the multiple first buffer members 131 can be connected to the entire longitudinal plate portion 1322 at the same time.

[0095] In some embodiments, the embedding groove 1221 penetrates to the axial end of the drum 122, and the fixing member 132 can be inserted into the embedding groove 1221 from one axial end of the drum 122. In order to reduce the difficulty of installation, the fixing member 132, the first buffer member 131 and the display film 110 are connected together first, and then the fixing member 132 is inserted into the embedding groove 1221 along the axial direction.

[0096] FIG. 6 is a first view assembly diagram of another first buffer unit provided by the embodiment of the present application installed between the drum and the display film of the projection screen, and FIG. 7 is a second view assembly diagram of another first buffer unit provided by the embodiment of the present application installed between the drum and the display film of the projection screen.

[0097] As shown in FIG. 6 or FIG. 7, in some embodiments, the first buffer unit 130 further includes multiple second fixing members 134, the multiple second fixing members 134 are located in the embedding groove 1221, and the multiple second fixing members 134 correspond one-to-one to the multiple first buffer members 131, and the first end of each first buffer member 131 is connected to the corresponding second fixing member 134; wherein each second fixing member 134 is integrally formed with the corresponding first buffer member 131. Wherein the first buffer member 131 can be a large base spring, and the bottom end thereof can serve as the second fixing member 134, playing the same supporting role as the first fixing member 132. Therefore, the structure of the first fixing member 132 can be omitted, reducing the cost.

[0098] For the display film 110 rising from the ground, the rising and falling of the display film 110 is pulled by the force acting on the top of the display film 110 through the rising and falling support 124 behind the display film 110. However, due to the shaking caused by the rising and falling of the rising and falling support 124 (the shaking of the slender rising and falling support 124, the change of the rising and falling speed of the rising and falling support 124 caused by the change of the motor speed, etc.), if the top and the bottom are rigidly connected, the vibration and energy can only be borne by the relatively soft display film 110, so the application can increase the elastic connection (spring or rubber, etc.) between the roller 122 (containing the display film 110) and the limiting piece 1212, such as the first buffer 131, and the vibration and energy are absorbed by the elastic body of the first buffer 131.

[0099] FIG. 8 is an assembly diagram of the first buffer unit installed between the roller and the support seat in the projection screen provided by the application.

[0100] As shown in FIG. 8, in some embodiments, the at least one buffer unit includes a second buffer unit 140, which is located between the roller 122 and the support seat 121 and is connected with the roller 122 and the support seat 121 respectively. By arranging the second buffer unit 140 between the roller 122 and the support seat 121, the vibration transmission between the roller 122 and the support seat 121 can be reduced, the vibration energy on the support seat 121 is reduced to be transmitted to the roller 122, and then to the display film 110.

[0101] As shown in FIG. 8, in some embodiments, the second buffer unit 140 further includes a second buffer 141 and a floating piece 142, the axial end of the roller 122 is connected with the floating piece 142, the floating piece 142 is movably connected with the support seat 121, and the two ends of the second buffer 141 are respectively connected with the floating piece 142 and the support seat 121.

[0102] Considering that the internal structure of the roller 122 is relatively small and complex, and the operation space is small, the second buffer unit 140 can be arranged between the support seat 121 and the roller 122. The roller 122 is movably connected with the support seat 121 through the floating piece 142, and the second buffer 141 capable of buffering and absorbing energy is arranged between the floating piece 142 and the support seat 121. The second buffer 141 can absorb the vibration energy between the floating piece 142 and the support seat 121, and then reduce the vibration energy of the roller 122 and the display film 110 connected therewith.

[0103] The embodiment can effectively reduce the problem of vibration of the display film 110 caused by the vibration of the ground or the desktop, and effectively block the vibration transmission path from the support seat 121 to the display film 110.

[0104] As shown in FIG. 8, in some embodiments, the support base 121 is provided with a limiting piece 1212, which is located on the side of the floating piece 142 away from the support base 121, and the second buffer piece 141 is located between the floating piece 142 and the limiting piece 1212.

[0105] Through the above arrangement, the floating piece 142 can be limited by the limiting piece 1212, and by adjusting the position of the limiting piece 1212, the pre-tightening condition of the second buffer piece 141 can be adjusted, thereby realizing the buffering effect of the buffering structure between the roller 122 and the support base 121.

[0106] As shown in FIG. 8, in some embodiments, the limiting piece 1212 is installed above the floating piece 142 by a mounting screw, the top end of the second buffer piece 141 is connected to the bottom surface of the limiting piece 1212, and the bottom end of the second buffer piece 141 is connected to the top surface of the floating piece 142. The second buffer piece 141 elastically suspends the floating piece 142 below the limiting piece 1212.

[0107] Through the arrangement of the limiting piece 1212 and the floating piece 142, the strength and stability of the second buffer piece 141 connected between the roller 122 and the support base 121 can be increased, so that the whole roller 122 is elastically connected with the support base 121, playing a role in buffering and absorbing vibration. The buffering and absorbing vibration design at the lower end of the display diaphragm 110 can effectively improve the shaking problem caused by the vibration at the bottom of the display diaphragm 110.

[0108] In some embodiments, threaded holes are respectively formed in the limiting piece 1212 and the support base 121, and a bolt fastener passes through the threaded holes of the limiting piece 1212 and the support base 121 in sequence, so as to install the limiting piece 1212 on the support base 121.

[0109] In some embodiments, the connection between the roller 122 and the floating piece 142 can also be connected in other fixed or detachable ways, which is not limited here.

[0110] The shaft core of the roller 122 passes through the floating piece 142, the floating piece 142 can slide up and down on the support base 121, and the second buffer piece 141 is installed between the floating piece 142 and the limiting piece 1212, which can effectively absorb external force and vibration, significantly improve the shaking problem of the display diaphragm 110, and improve the stability and service life of the display diaphragm 110.

[0111] As shown in FIG. 8, in some embodiments, the support base 121 is provided with a sliding groove 1211, the groove of the sliding groove 1211 faces the top end of the support base 121, and the sliding groove 1211 extends along the moving direction of the display film 110; at least one of the floating piece 142 and the limiting piece 1212 is a block structure, and the floating piece 142 moves in the sliding groove 1211, so that the distance between the limiting piece 1212 and the floating piece 142 is variable.

[0112] Through the setting of the sliding groove 1211, the relative up-and-down movement of the floating piece 142 on the support base 121 is guided, and the stability of the movement of the floating piece 142 is improved.

[0113] As shown in FIG. 8, X represents the moving direction of the display film 110. In order to avoid the floating piece 142 from deviating from the sliding groove 1211 when moving along the X direction, at least two protrusions can be arranged in the sliding groove 1211, the at least two protrusions are located on the opposite sides of the inner wall of the sliding groove 1211, and the protrusions extend along the moving direction of the display film 110; at least two recesses are arranged on the floating piece 142, and the protrusions can be clamped into the recesses, so as to improve the stability of the up-and-down movement of the floating piece 142.

[0114] In some embodiments, considering that the space between the floating piece 142 and the limiting piece 1212 can be relatively limited, in order to improve the buffering effect, the second buffer piece 141 can be multiple, and the multiple second buffer pieces 141 can be arranged at intervals between the floating piece 142 and the limiting piece 1212. Alternatively, part of the second buffer pieces 141 are arranged between the floating piece 142 and the limiting piece 1212, and the other part of the second buffer pieces 141 are arranged between the floating piece 142 and the bottom wall of the sliding groove 1211.

[0115] FIG. 9 is a first view assembly diagram of a second buffer unit installed between a display film and a cross beam in a projection screen according to an embodiment of the present application, and FIG. 10 is a second view assembly diagram of a second buffer unit installed between a display film and a cross beam in a projection screen according to an embodiment of the present application.

[0116] As shown in FIG. 9, in some embodiments, the cross beam 123 is located at the end of the display film 110 away from the roller 122, and is used to support the end of the display film 110, and the cross beam 123 is connected with the lifting bracket 124; the at least one buffer unit includes a third buffer unit 150, and the third buffer unit 150 includes a third buffer piece 151, and the third buffer piece 151 is connected with the cross beam 123 and the display film 110 respectively.

[0117] In this embodiment, the end of the display film 110 is supported by the cross beam 123 to ensure that the display film 110 can be unfolded flat. The third buffer 151 arranged between the cross beam 123 and the display film 110 can prevent the vibration of the cross beam 123 from being transmitted to the display film 110, and can also absorb the vibration energy of the display film 110 itself.

[0118] As shown in FIG. 9, in some embodiments, the third buffer unit 150 further includes a second reinforcing member 152 located at the end of the display film 110, the first end of the third buffer 151 is arranged on the cross beam 123, and the second end of the third buffer 151 is connected to the second reinforcing member 142 and the display film 110 at the same time.

[0119] Considering that the material of the display film 110 is relatively soft, if the third buffer 151 is directly connected to the display film 110, the third buffer 151 is easy to pull the display film 110 during the tensioning process, thereby damaging the display film 110. Therefore, the second reinforcing member 142 is added at the end of the display film 110, so that the third buffer 151 acts on the second reinforcing member 142 during the tensioning process, thereby reducing the damage to the display film 110.

[0120] As shown in FIG. 9, in some embodiments, the second reinforcing member 142 is provided with a second mounting hole 1521, and the second end of the second buffer 141 passes through the second mounting hole 1521 of the second reinforcing member 142, so that the second end of the third buffer 151 is connected to the second reinforcing member 142 and the display film 110.

[0121] Through the above arrangement, the third buffer 151 can be fitted into the second mounting hole 1521 of the second reinforcing member 142, so as to realize the force connection between the first buffer 131 and the display film 110.

[0122] As shown in FIGS. 9 and 10, in some embodiments, the support unit 120 further includes a cross beam 123 located at the end of the display film 110 away from the roller 122 to support the end of the display film 110; the projection screen 100 further includes a third buffer unit 150, the third buffer unit 150 includes a third buffer 151 and a second reinforcing member 152, at least part of the third buffer 151 is a deformation structure, the first end of the third buffer 151 is arranged on the cross beam 123, the second reinforcing member 152 and the top end of the display film 110 are both provided with a second mounting hole 1521, and the second end of the third buffer 151 passes through the second mounting hole 1521 of the second reinforcing member 142 and the second mounting hole 1521 of the display film 110 in sequence, so that the second end of the third buffer 151 is arranged on the second reinforcing member 142 and the display film 110.

[0123] The second reinforcing member 142 can increase the strength and stability of the third buffer member 151 connected between the cross beam 123 and the display film 110.

[0124] In addition, considering that the display film 110 is made of soft material, if the second mounting hole 1521 is directly opened in the display film 110, the third buffer member 151 is easy to pull the display film 110 during the tensioning process, thereby damaging the display film 110. Therefore, the second reinforcing member 142 is added to the end of the display film 110, so that the third buffer member 151 acts on the second reinforcing member 142 during the tensioning process, thereby reducing the damage to the display film 110.

[0125] As shown in FIG. 9 or FIG. 10, in some embodiments, the actual force of the second buffer member 141 is inclined. The force decomposition is shown in FIG. 9. On the one hand, the force overcomes the weight of the display film 110 upward along the display film 110. On the other hand, the horizontal tension pulls the display film 110 to be close to the cross beam 123, and at the same time, the easy-to-pull adhesive is assisted to be pasted between the cross beam 123 and the display film 110, thereby preventing the display film 110 from being horizontally separated from the cross beam 123, and at the same time, there is a certain sliding in the up-down direction.

[0126] In some embodiments, the friction coefficient between the display film 110 and the cross beam 123 is μ, and the initial deformation of the third buffer member 151 is S1. When the third buffer member 151 is normally raised to the viewing state, F4=F5xμ+F6, and the third buffer member 151 is in the initial deformation S1. When the display film 110 is subjected to external force, F6<F4+F5xμ, and the third buffer member 151 is elongated. At this time, the extension deformation S2 of the third buffer member 151 is greater than S1. The deformation of the third buffer member 151 absorbs the external force, thereby protecting the display film 110 from deformation and vibration. During the lifting process of the display film 110, for example, the F6>F5xμ+F4, at this time, the deformation S2 of the third buffer member 151 is greater than S1. The deformation of the third buffer member 151 absorbs the external force, thereby protecting the display film 110 from deformation and vibration.

[0127] In some embodiments, the first end of the third buffer member 151 can be connected to the cross beam 123 in a fixed or detachable manner. The specific mounting method is not limited here. Considering the cost, generally, a hole is opened in the cross beam 123, and the end of the third buffer member 151 passes through the hole to be fixed on the cross beam 123.

[0128] The second mounting hole 1521 of the second reinforcing member 142 and the mounting hole of the display film 110 correspond to each other, so that the second end of the third buffer member 151 passes through in sequence, and then the second end of the third buffer member 151 can be fixed on the second reinforcing member 142 and the display film 110.

[0129] In some embodiments, the first and second reinforcing members 133 and 142 can have the same structure, for example, can both be reinforcing plates, which are easy to manufacture, low in cost, and easy to obtain.

[0130] FIG. 11 is a first view of the assembly of a second buffer unit in a projection screen according to an embodiment of the present application, and FIG. 12 is a second view of the assembly of the second buffer unit in the projection screen according to the embodiment of the present application.

[0131] In some embodiments, as shown in FIGS. 11 and 12, the second reinforcing member 142 can be a reinforcing rod. A net structure is added to the top end of the display film 110, and the reinforcing rod is inserted into the net structure. The third buffer unit 150 is connected to the cross beam 123.

[0132] FIG. 13 is a first view of the assembly of a second buffer unit in a projection screen according to an embodiment of the present application, and FIG. 14 is a second view of the assembly of the second buffer unit in the projection screen according to the embodiment of the present application.

[0133] As shown in FIGS. 13 and 14, in some embodiments, the cross beam 123 is provided with a mounting groove 1231, and the groove opening of the mounting groove 1231 faces the end of the display film 110. The third buffer unit 150 includes a plurality of third buffer members 151. The first end of each third buffer member 151 is connected to the groove wall of the mounting groove 1231, and the second end of each third buffer member 151 is connected to the end of the display film 110.

[0134] Through the above arrangement, the plurality of third buffer members 151 in the third buffer unit 150 can be connected to the cross beam 123 by using the mounting groove 1231, which has a simple structure and high reliability.

[0135] In some embodiments, the third buffer unit 150 further includes a third fixing member (not shown in the figures), which is located in the mounting groove 1231, and the first end of each third buffer member 151 is connected to the third fixing member. Through the above arrangement, the plurality of third buffer members 151 can be fixedly installed in the mounting groove 1231 by using the third fixing member. The structure of the third fixing member can refer to the structure of the first fixing member 132.

[0136] As shown in FIGS. 13 and 14, in some embodiments, the third buffer 151 includes a buffer portion 1511 and a blocking portion 1512, the blocking portion 1512 is located in the mounting slot 1231, the first end of the buffer portion 1511 is connected with the second reinforcing member 152, the second end of the buffer portion 1511 is connected with the blocking portion 1512, and the buffer portion 1511 and the blocking portion 1512 are integrally formed. Through the above arrangement, the third buffer 151 can be connected to the cross beam 123 by the blocking portion 1512 and connected to the display film 110 by the buffer portion 1511. The third buffer 151 has a simple structure and does not need complex installation steps.

[0137] As shown in FIG. 14, in some embodiments, the bottom of the mounting slot 1231 has a mounting opening 12311 penetrating through the bottom of the mounting slot 1231, the blocking portion 1412 abuts against the bottom of the mounting slot 1231 away from the slot of the mounting slot 1231, and the second end of the buffer portion 1411 is connected to the second reinforcing member 142, and the second end of the buffer portion 1411 is connected to the blocking portion 1412 through the mounting opening 12311.

[0138] In this embodiment, the mounting opening 12311 at the bottom of the mounting slot 1231 is used to achieve the blocking and fixing of the blocking portion 1412, so that the third buffer 151 is easier to install and can provide stable and reliable abutting support.

[0139] In some embodiments, the third buffer 151 can be a large bottom spring, so that the mounting slot 1231 for fixing the third buffer 151 on the cross beam 123 can be directly molded without further processing of the mounting hole. Its function is similar to the above, which will not be described here.

[0140] In some embodiments, the display film 110 is rigidly connected with the cross beam 123 as a whole, and an elastic buffer structure can be designed between the cross beam 123 and the lifting support 124.

[0141] FIG. 15 is an assembly schematic diagram of a second buffer unit installed between a lifting support and a cross beam in a projection screen provided by an embodiment of the present application. As shown in FIG. 15, in some embodiments, the support unit 120 further includes a lifting support 124 and an adapter frame 125, the lifting support 124 is a connecting rod structure, the lifting support 124 is located between the cross beam 123 and the support base 121, and the lifting support 124 is configured to drive the display film 110 to unfold or be stored.

[0142] As shown in FIG. 15, in some embodiments, the at least one buffering unit includes a fourth buffering unit 160, which is located between the lifting support 124 and the cross beam 123 and connected with the lifting support 124 and the cross beam 123 respectively. By arranging the fourth buffering unit 160 between the lifting support 124 and the cross beam 123, the vibration energy of the lifting support 124 can be reduced from being transmitted to the cross beam 123, and then to the display film 110.

[0143] As shown in FIG. 15, in some embodiments, the bottom of the cross beam 123 is provided with a receiving cavity 1232, and at least part of the lifting support 124 is located in the receiving cavity 1232; the fourth buffering unit 160 includes a plurality of fourth buffering pieces 161, a first end of each fourth buffering piece 161 is connected with a slot wall of the receiving cavity 1232, and a second end of each fourth buffering piece 161 is connected with the lifting support 124.

[0144] Through the above arrangement, the lifting support 124 can be flexibly connected with the cross beam 123 through the plurality of fourth buffering pieces 161, and the vibration energy of the lifting support 124 can be reduced from being transmitted to the cross beam 123.

[0145] As shown in FIG. 15, in some embodiments, the support unit 120 further includes an adapter 125, the adapter 125 is located in the receiving cavity 1232, the lifting support 124 is rotatably installed on the adapter 125, and the plurality of fourth buffering pieces 161 are located between the adapter 125 and the cross beam 123, so that the distance between the adapter 125 and the cross beam 123 along the movement direction of the display film 110 is variable.

[0146] In some embodiments, the first buffering piece 131 is connected between the display film 110 and the roller 122, the second buffering piece 141 is connected between the roller 122 and the support seat 121, the third buffering piece 151 is connected between the cross beam 123 and the display film 110, and the fourth buffering piece 161 is connected between the cross beam 123 and the lifting support 124. The deformation characteristics of the first buffering piece 131, the second buffering piece 141, the third buffering piece 151 and the fourth buffering piece 161 can be utilized to absorb the shaking of the display film 110 caused by external vibration and energy.

[0147] The first buffering piece 131, the second buffering piece 141, the third buffering piece 151 and the fourth buffering piece 161 described above can be arranged separately or simultaneously. When arranged simultaneously, the effect of reducing shaking is better.

[0148] As shown in FIG. 15, the adapter frame 125 is connected with the lifting support 124 through an axle pin. In some embodiments, the fourth buffer unit 160 further comprises a plurality of adjusting screws 162, which are coaxially connected with the plurality of fourth buffer members 161 respectively on the adapter frame 125. The pre-pressing force of the fourth buffer members 161 can be adjusted by rotating the adjusting screws 163, so as to ensure that the fourth buffer members 161 have sufficient elastic force and the beam 123 and the adapter frame 125 have sufficient buffer force.

[0149] In some embodiments, considering that the space between the adapter frame 125 and the beam 123 is relatively narrow, in order to improve the buffer effect, the fourth buffer members 161 can be multiple, which are arranged at intervals between the adapter frame 125 and the beam 123.

[0150] In some embodiments, the buffer unit comprises at least one of a flexible material and an elastic material. At least one of the first buffer member 131, the second buffer member 141 and the third buffer member 143 is a flexible member; or, at least one of the first buffer member 131, the second buffer member 141 and the third buffer member 143 is an elastic member.

[0151] In some embodiments, at least one of the first buffer member 131, the second buffer member 141, the third buffer member 151 and the fourth buffer member 161 is made of a flexible material, thereby effectively reducing the shaking of the display film 110 caused by external environment (such as wind, mechanical vibration, etc.), absorbing and dispersing external force and vibration, reducing the direct transmission of the force to the display film 110, and significantly reducing the shaking amplitude and frequency of the display film 110, thereby improving the stability of the display film 110.

[0152] In some embodiments, at least one of the first buffer member 131, the second buffer member 141, the third buffer member 151 and the fourth buffer member 161 can be a soft rubber member, which can be made of a material with elastic deformation ability, such as silicone, polypropylene (PP), ethylene-vinyl acetate copolymer (EVA), etc. In actual application, the lifting support 124, the beam 123, the roller 122 and other structures are usually made of metal materials to enhance the strength and rigidity of the projection screen 100. For example, the other structures can be made of light metal materials such as aluminum, magnesium and titanium.

[0153] Of course, at least one of the first buffer member 131, the second buffer member 141, the third buffer member 151 and the fourth buffer member 161 can also be an elastic member, which can be a structure made of an elastic material, such as a compression spring, etc.

[0154] In another aspect, the embodiments of the present application also provide a projection system 200.

[0155] FIG. 16 is a structural schematic diagram of a projection system according to an embodiment of the present application. As shown in FIG. 16, in some embodiments, the projection system 200 includes a projection device 210 and the projection screen 100 described above, and the projection device 210 is configured to project a projection picture to the projection screen 100.

[0156] The projection system 200 can include the projection screen 100 and the projection device 210, the projection screen 100 can be the projection screen 100 according to the embodiments of the present application, and the front surface of the projection screen 100 can be a Fresnel structure.

[0157] In some embodiments, the projection device 210 includes a projection host, and the projection host is configured to emit a light beam.

[0158] When the projection device 210 is not used, 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 used, the display film 110 is stretched by the lifting bracket 124 and the roller 122 to be unfolded, so that the display film 110 reflects the light beam emitted by the projection host and displays a picture. When the display film 110 is in the unfolded state, the display film 110 is limited to a target position at a target pitch angle, which ensures the display effect of the projection screen 100.

[0159] In some embodiments, the projection device 210 is provided with the projection host, and the projection host can be an ultra-short focus projection host, which can be a DLP (Digital Light Procession) projection host. In this way, the distance between the projection host and the plane on which the optical film 111 is arranged is set to be short, so as to realize the miniaturization design of the entire projection device 210.

[0160] The projection host can include a light source, an optical engine and a 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 configured to emit a light beam to the optical engine, the light source and the lens are fixedly connected to the optical engine, the DMD chip is arranged in 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 electrically connected to the speaker, and the heat dissipation system is electrically connected to the heat sink.

[0161] In this way, the light beam emitted by the light source reaches the DMD chip in the optical engine system, the control circuit board controls the DMD chip to modulate the light beam emitted on the DMD chip, and the modulated light beam carries the image information output by the control circuit board to the lens, and then the light beam emitted by the lens is displayed on the display film 110 included in the projection screen 100. In addition, the control circuit board controls the audio processing system to process the audio information output by the control circuit board, and the processed audio information is played through the sound. When displaying image information and playing audio information, the control circuit board can control the heat dissipation system to drive the heat sink to dissipate heat, so as to avoid high temperature affecting the function of each device.

[0162] As shown in FIG. 16, in some embodiments, the projection device 210 further includes a storage part 211 for storing the projection host and the coiled lifting type projection screen 100. The storage part 211 can have a light transmission area 2111 and an opening 2112, the light beam emitted by the projection host can pass through the light transmission area 2111, and the projection screen 100 passes through the opening 2112 and is unfolded. In this way, when the projection device 210 is not used, the projection host and the coiled lifting type projection screen 100 are stored in the storage part 211, which saves space. When the projection device 210 is in use, the projection screen 100 is unfolded, and at the same time the projection host projects the light beam onto the projection screen 100, so that the projection screen 100 displays the projection picture.

[0163] In some embodiments, the vertical distance from the center point of the light transmission area 2111 to the plane on which the display film 110 is located after being unfolded is equal to the product of the projection ratio of the projection host and the width of the display area on the display film 110, wherein the width of the display area refers to the size of the display area in the horizontal direction. In this way, it can be ensured that the light beam emitted by the projection host can be accurately projected onto the display area of the display film 110, so as to ensure the clarity of the display picture on the display film 110.

[0164] Through the setting of the buffer unit, the display film shaking caused by external environment (such as wind, mechanical vibration, etc.) can be effectively reduced, the external force and vibration can be absorbed and dispersed, the force directly transmitted to the display film is reduced, the shaking amplitude and frequency of the display film are significantly reduced, thereby improving the stability of the display film, reducing picture shaking and blurring, providing better picture quality and viewing experience, and improving customer satisfaction; in addition, the direct impact of external force on the material of the display film can be reduced, thereby prolonging the service life of the display film. That is, by increasing the buffer unit to form a buffer vibration absorption structure, the external force and vibration can be effectively absorbed, the shaking problem of the display film can be significantly improved, the stability and service life of the display film can be improved, and the user's experience can be improved.

[0165] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A projection screen (100), wherein, include: Display diaphragm (110), support unit (120) and at least one buffer unit; The display film (110) has a projection light-receiving surface; The support unit (120) includes a support base (121), a roller (122), a crossbeam (123), and a lifting bracket (124); The roller (122) is rotatably connected to the support base (121), and the roller (122) is connected to one end of the display film (110); the crossbeam (123) is connected to the other end of the display film (110); The lifting bracket (124) is connected to the crossbeam (123) and the support base (121) respectively; One of the buffer units is located between the connected first component and the second component, which are two of the display film (110), the support base (121), the roller (122), the crossbeam (123), and the lifting bracket (124), respectively. In this embodiment, at least a portion of the elastic modulus of each of the buffer units is less than the elastic modulus of the display film (110).

2. The projection screen (100) according to claim 1, wherein, The at least one buffer unit includes a first buffer unit (130), which is located between the display film (110) and the roller (122) and is connected to the display film (110) and the roller (122) respectively.

3. The projection screen (100) according to claim 2, wherein, The roller (122) is provided with an embedding groove (1221), which is provided along the length direction of the roller (122); The end of the display film (110) extends into the embedding groove (1221) through the opening of the embedding groove (1221); The first buffer unit (130) includes a plurality of first buffer members (131), the first end of each first buffer member (131) is connected to the groove wall of the embedding groove (1221), and the second end of each first buffer member (131) is connected to the end of the display film (110).

4. The projection screen (100) according to claim 3, wherein, The first buffer unit (130) further includes a first fixing member (132), which is located in the embedding groove (1221), and the first end of each first buffer member (131) is disposed on the first fixing member (132).

5. The projection screen (100) according to claim 4, wherein, The first buffer unit (130) further includes a plurality of second fasteners (134), all of which are located in the embedding groove (1221), and the plurality of second fasteners (134) correspond one-to-one with the plurality of first buffers (131), with the first end of each first buffer (131) connected to the corresponding second fastener (134); Each of the second fixing members (134) is integrally formed with the corresponding first buffer member (131).

6. The projection screen (100) according to claim 5, wherein, The first buffer unit (130) further includes a first reinforcing member (133) connected to the end of the display film (110), and the second end of the first buffer member (131) is connected to the first reinforcing member (133).

7. The projection screen (100) according to claim 6, wherein, The first reinforcing member (133) is provided with a first mounting hole, and the second end of the first buffer member (131) passes through the first mounting hole so that the second end of the first buffer member (131) is connected to the first reinforcing member (133).

8. The projection screen (100) according to any one of claims 3 to 7, wherein, The roller (122) includes a roller body (1223) and two abutting portions (1222), the two abutting portions (1222) being spaced apart on the periphery of the roller body (1223); The roller body (1223) has the embedded groove (1221); Each of the abutting portions (1222) extends from the periphery of the roller body (1223) into the embedding groove (1221) and has a gap between it and the bottom of the embedding groove (1221), and the two abutting portions (1222) form the opening of the embedding groove (1221).

9. The projection screen (100) according to claim 2, wherein, The first buffer unit (130) is a strip structure made of elastic material. One side of the first buffer unit (130) is fixedly connected to the end of the display film (110), and the other side is fixedly connected to the side of the roller (122).

10. The projection screen (100) according to any one of claims 1 to 9, wherein, The at least one buffer unit includes a second buffer unit (140), which is located between the roller (122) and the support (121) and is connected to the roller (122) and the support (121) respectively.

11. The projection screen (100) according to claim 10, wherein, The second buffer unit (140) includes a second buffer member (141) and a floating member (142). The axial end of the roller (122) is connected to the floating member (142). The floating member (142) is movably connected to the support base (121). The two ends of the second buffer member (141) are respectively connected to the floating member (142) and the support base (121).

12. The projection screen (100) according to claim 11, wherein, The support base (121) is provided with a limiting member (1212), which is located on the side of the floating member (142) away from the support base (121). The second buffer member (141) is located between the floating member (142) and the limiting member (1212). One end of the second buffer member (141) is connected to the surface of the floating member (142) facing the limiting member (1212), and the other end is connected to the surface of the limiting member (1212) facing the floating member (142).

13. The projection screen (100) according to claim 12, wherein, The support base (121) is provided with a sliding groove (1211), which extends along the moving direction of the display film (110); The floating component (142) is slidably connected to the sliding groove (1211).

14. The projection screen (100) according to any one of claims 1 to 13, wherein, The at least one buffer unit includes a third buffer unit (150), the third buffer unit (150) includes a third buffer element (151), the third buffer element (151) is connected to the crossbeam (123) and the display film (110) respectively.

15. The projection screen (100) according to claim 14, wherein, The third buffer unit (150) further includes a second reinforcing member (152) located at the end of the display film (110); the first end of the third buffer member (151) is connected to the crossbeam (123), and the second end of the third buffer member (151) is connected to the second reinforcing member (152).

16. The projection screen (100) according to claim 15, wherein, The second reinforcing member (152) is provided with a second mounting hole (1521), and the second end of the third buffer member (151) passes through the second mounting hole (1521) so that the second end of the third buffer member (151) is connected to the second reinforcing member (152).

17. The projection screen (100) according to claim 15 or 16, wherein, An installation groove (1231) is provided on the crossbeam (123), and the opening of the installation groove (1231) faces the end of the display film (110); The third buffer unit (150) includes a plurality of third buffer elements (151), the first end of each third buffer element (151) is connected to the wall of the mounting groove (1231), and the second end of each third buffer element (151) is connected to the end of the display film (110).

18. The projection screen (100) according to claim 17, wherein, The third buffer unit (150) also includes a third fixing member, which is located in the mounting groove (1231), and the first end of each third buffer member (151) is connected to the third fixing member.

19. The projection screen (100) according to claim 17, wherein, Each of the third buffer members (151) includes a buffer portion (1511) and a stop portion (1512), the stop portion (1512) being located within the mounting groove (1231), the first end of the buffer portion (1511) being connected to the second reinforcing member (152), and the second end of the buffer portion (1511) being connected to the stop portion (1512); The buffer part (1511) and the stop part (1512) are integrally formed.

20. The projection screen (100) according to claim 19, wherein, The bottom of the mounting groove (1231) has a mounting opening (12311), which penetrates the bottom of the mounting groove (1231). The blocking part (1512) is located on the side of the bottom of the mounting groove (1231) away from the opening of the mounting groove (1231). The second end of the buffer part (1511) passes through the mounting opening (12311) and connects to the blocking part (1512).

21. The projection screen (100) according to any one of claims 1 to 20, wherein, The at least one buffer unit includes a fourth buffer unit (160), which is located between the lifting bracket (124) and the crossbeam (123) and is connected to the lifting bracket (124) and the crossbeam (123) respectively.

22. The projection screen (100) according to claim 21, wherein, The bottom of the crossbeam (123) is provided with a receiving cavity (1232), and at least a portion of the lifting bracket (124) is located in the receiving cavity (1232); The fourth buffer unit (160) includes a plurality of fourth buffer members (161), the first end of each fourth buffer member (161) is connected to the groove wall of the receiving cavity (1232), and the second end of each fourth buffer member (161) is connected to the lifting bracket (124).

23. The projection screen (100) according to claim 22, wherein, The fourth buffer unit (160) further includes a plurality of adjusting screws (162), which are threadedly connected to the lifting bracket (124) respectively. The plurality of adjusting screws (162) correspond one-to-one with the plurality of fourth buffer components (161). The second end of each fourth buffer component (161) is connected to the corresponding adjusting screw (162). The adjusting screw (162) is used to adjust the preload of the corresponding fourth buffer component (161).

24. The projection screen (100) according to any one of claims 1 to 23, wherein, The display film (110) includes an unfolded state and a retracted state. In the unfolded state, the two ends of the display film (110) are supported by the lifting bracket (124) and moved away from each other. In the retracted state, the display film (110) is rolled up and wrapped around the roller (122).

25. The projection screen (100) according to any one of claims 1 to 24, wherein, The buffer unit includes at least one of flexible and elastic materials; And / or, the display film (110) is made of polyethylene terephthalate.

26. A projection system (200), wherein, It includes a projection device (210) and a projection screen (100) according to any one of claims 1 to 25, wherein the projection device (210) is used to project a projected image onto the projection screen (100).

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