Projection screen and projection system

Abstract

The utility model provides a projection screen and a projection system, and the projection screen comprises a display diaphragm which is provided with a projection light-receiving surface; the winding drum unit comprises a winding drum, an embedded groove is formed in the winding drum, a notch of the embedded groove faces the outer side of the winding drum, the notch of the embedded groove is provided with two groove edges in the winding direction of the display diaphragm, the two groove edges have height difference in the radial direction of the winding drum, and the end of the display diaphragm extends into the embedded groove through the notch of the embedded groove. The display diaphragm is attached to the groove wall of the embedded groove close to one side of the center of the winding drum so as to be wound around the periphery of the winding drum. The installation stability of the display diaphragm is improved, the display diaphragm is convenient to curl, and the problem of curl marks of the display diaphragm is solved.

Description

Technical Field

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

[0002] With the continuous development of society, people's pursuits are also constantly changing. For laser TVs, the lightness and simplicity of the screen have become a pursuit indicator for people. The lifting and curling projection screen is a major direction for the differentiation of projection display from traditional flat-panel display due to its small size, convenient transportation and installation, and good integration with home places.

[0003] At present, the display film and structural parts are packaged together. However, the packaging volume is large when the display film is not curled. When delivering the product to the user's home, the packaging needs to be unpacked downstairs of the user. The display film is curled into a tube with a fixed diameter by a curling tool for delivery. Therefore, the display film may be scratched and creased during curling.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Utility Model Content

[0005] The main purpose of the present application is to provide a projection screen and a projection system, which not only improves the installation stability of the display film and facilitates curling, but also solves the problem of curling marks on the display film.

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

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

[0008] The reel unit includes a reel having an embedding groove on the reel, the notch of the embedding groove facing the outside of the reel, and along the winding direction of the display film, the notch of the embedding groove has two groove edges, and the two groove edges have a height difference in the radial direction of the reel, the end of the display film extends into the embedding groove through the notch of the embedding groove, and the display film is attached to the groove wall of the embedding groove close to the center of the reel so as to be wound on the outer periphery of the reel.

[0009] The beneficial effects of the present application are as follows: through the design of the embedded groove, on the one hand, the height difference between the display film and the outer side of the roll in the radial direction of the roll can be compensated, so that the second layer of display film can smoothly transition at the position of the side close to the edge of the first layer of display film, and the projection screen after winding can be prevented from having creases or wrinkles on other layers of display film due to the thickness of the first layer of display film when winding, and the flatness of the projection screen can be improved, which solves the problem of poor display effect of the curling and lifting projection screen in the related art, improves the display effect of the display film, and further reduces the risk of damage to the display film, thereby increasing the life of the projection screen; on the other hand, when curling, the display film is inserted into the embedded groove for curling, which fixes the display film and prevents the display film from falling during transportation. The present application not only improves the installation stability of the display film and facilitates curling, but also solves the problem of curling marks on the display film.

[0010] Based on the above technical solution, the present application can also be improved as follows.

[0011] In some optional embodiments, the embedded groove is an arc-shaped groove;

[0012] There is an included angle between the extending direction of the embedded groove and the radial direction of the winding drum.

[0013] It should be noted that such an arrangement, in addition to ensuring that the display film is inserted into and fixedly installed in the embedding groove, can also be rolled in the embedding groove according to the shape of the embedding groove to avoid squeezing the display film.

[0014] In some optional embodiments, the groove wall of the embedded groove has a smooth section, and there is an arc section between the groove opening of the embedded groove and the outer wall of the reel, the smooth section is connected to the arc section, and the display film is sequentially attached to the smooth section and the arc section.

[0015] It should be noted that it can be ensured that the display film can be smoothly extended into the embedding groove and between the outer side walls of the winding roll to avoid problems such as extrusion.

[0016] In some optional embodiments, the roll unit further includes a compensation portion, which is located outside the roll and has an embedding groove thereon, and is used to compensate for a height difference between the end of the display film and the roll in the radial direction of the roll.

[0017] It should be noted that the compensation portion is connected to the outer wall of the roll and is higher than the outer wall of the roll, so that the two groove edges have a height difference in the radial direction of the roll. The height difference can also be the height difference formed between the end of the display film and the roll in the radial direction of the roll. The purpose is to match the thickness of the display film so that the second layer of display film can smoothly transition to the position close to the edge of the first layer of display film. This can avoid creases or wrinkles on other layers of the display film after winding due to the thickness of the first layer of display film, and can improve the flatness of the projection screen.

[0018] In some optional embodiments, an embedding groove is formed between the inner side wall of the compensation portion and the outer side wall of the reel.

[0019] It should be noted that the distance between the compensation portion and the center of the roll is greater than the distance between the outer wall of the roll and the center of the roll to compensate for the thickness of a layer of display film, wherein the display film extends into the embedding groove for the convenience of accommodating and connecting the display film.

[0020] In some optional embodiments, along the radial direction of the roll, the distance between the outer wall of the compensation part located at the slot opening of the embedded groove and the center of the roll is smaller than the distance between the outer wall of the compensation part located at the slot bottom of the embedded groove and the center of the roll.

[0021] It should be noted that such a configuration enables the display film to be smoothly wound around the reel 121 and the outer wall of the compensation portion in sequence, thereby reducing the risk of damage to the display film.

[0022] In some optional embodiments, the projection screen further comprises a shell having a receiving cavity, and the display film is wound around the outer circumference of the roll to be received in the receiving cavity.

[0023] It should be noted that the long-term curling of the display film is achieved, and the display film and the roll are integrated into one package, which reduces the packaging volume, improves the user experience, and reduces the packaging cost and logistics cost.

[0024] In some optional embodiments, the compensation portion and the reel are an integrally formed structure.

[0025] In a second aspect, the present application also provides a projection screen, comprising:

[0026] Display diaphragm;

[0027] The reel has an embedding groove, and the display film extends into the embedding groove to be wound around the outer circumference of the reel.

[0028] In a third aspect, the present application also provides a projection system, including a projection device and the above-mentioned projection screen, wherein the projection device is used to project a projection picture onto the projection screen.

[0029] The present application provides a projection screen and a projection system, wherein the projection system includes a projection device and a projection screen, wherein the projection device is used to project a projection picture onto the projection screen; wherein the projection screen includes: a display film, wherein the display film has a projection light-receiving surface; and a roll unit, wherein the roll unit includes a roll, wherein an embedding groove is provided on the roll, wherein the groove opening of the embedding groove faces the outside of the roll, and along the winding direction of the display film, the groove opening of the embedding groove has two groove edges, and the two groove edges have a height difference in the radial direction of the roll, wherein the end of the display film extends into the embedding groove through the groove opening of the embedding groove, and the display film is attached to the groove wall of the embedding groove close to the center of the roll so as to be wound around the outer periphery of the roll.

[0030] Through the design of the embedded groove, on the one hand, the height difference between the display film and the outer side of the roll in the radial direction of the roll can be compensated, so that the second layer of display film can smoothly transition at the position of the side close to the edge of the first layer of display film, and the projection screen after winding can be prevented from having creases or wrinkles on other layers of display film due to the thickness of the first layer of display film. The flatness of the projection screen can be improved, and the problem of poor display effect of the rolled and lifted projection screen in the related art is solved, and the display effect of the display film is improved, thereby reducing the risk of damage to the display film and increasing the life of the projection screen; on the other hand, when curling, the display film is inserted into the embedded groove for curling, which fixes the display film and prevents the display film from falling during transportation. The present application not only improves the installation stability of the display film and facilitates curling, but also solves the problem of curling marks on the display film. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0032] Figure 1 A schematic diagram of the structure of a projection screen in a first state provided by the prior art;

[0033] Figure 2 A schematic diagram of the structure of the second state of the projection screen provided by the prior art;

[0034] Figure 3 A schematic diagram of the structure of the projection screen in the third state provided by the prior art;

[0035] Figure 4 A schematic diagram of the structure of the fourth state of the projection screen provided by the prior art;

[0036] Figure 5A schematic diagram of the structure of the first viewing angle of the projection screen in the fifth state provided by the prior art;

[0037] Figure 6 A schematic diagram of the structure of the second viewing angle of the projection screen in the fifth state provided by the prior art;

[0038] Figure 7 A schematic diagram of the structure of a packaging box in a projection screen provided by the prior art;

[0039] Figure 8 A schematic diagram of the structure of a display film in a projection screen provided in an embodiment of the present application;

[0040] Fig. 9 A schematic diagram of the structure of a roller unit in a projection screen provided in an embodiment of the present application;

[0041] Fig.10 A schematic diagram of the assembly of a roller unit and a display film in a projection screen provided by an embodiment of the present application at a first viewing angle;

[0042] Fig.11 A schematic diagram of the assembly of a roller unit and a display film in a projection screen provided by an embodiment of the present application at a second viewing angle;

[0043] Fig.12 A schematic diagram of the structure of a housing in a projection screen provided in an embodiment of the present application;

[0044] Fig.13 A schematic diagram of the structure of a projection system provided in an embodiment of the present application.

[0045] Description of reference numerals:

[0046] 100-projection screen; 101-rolled piece; 102-packing box; 110-display film;

[0047] 120-reel unit; 121-reel; 122-embedded groove; 1221-smooth section; 1222-arc section; 123-compensation section;

[0048] 130-housing;

[0049] 200 - projection system; 210 - projection device; 211 - storage portion; 2111 - light-transmitting area; 2112 - opening. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application. All other embodiments obtained are within the scope of protection of the present application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0051] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0054] at present, Figure 1 A schematic diagram of the structure of the projection screen in the first state provided by the prior art, Figure 2A schematic diagram of the structure of the second state of the projection screen provided by the prior art, Figure 3 A schematic diagram of the structure of the projection screen in the third state provided by the prior art, Figure 4 A schematic diagram of the structure of the fourth state of the projection screen provided by the prior art, Figure 5 A schematic diagram of the structure of the first viewing angle of the projection screen in the fifth state provided by the prior art, Figure 6 A schematic diagram of the structure of the second viewing angle of the projection screen in the fifth state provided by the prior art, Figure 7 A schematic diagram of the structure of a packaging box in a projection screen provided in the prior art.

[0055] like Figures 1 to 7 As shown, when the product arrives downstairs at the user's home, Figure 7 The packaging box 102 in the display film 110 is unpacked, and the curling piece 101 on the packaging box is removed. Each two circular paper shells are glued together and then placed on both sides of one end of the display film 110, such as Figure 2 Then the display film 110 is rolled from one end to the other side, as shown. Figure 3 , Figure 4 After the display film 110 is rolled up, one end of the display film 110 is fixed with tape to prevent the display film 110 from spreading out. At this time, the display film 110 is rolled up into a cylindrical shape. The film is placed vertically and then taken into the elevator. Figure 5 and Figure 6 However, the display film 110 and the curling member 101 are packaged as a whole, but the packaging box 102 is relatively large when the display film 110 is not curled. When entering the house, the packaging box 102 needs to be disassembled downstairs of the user, and the display film 110 is curled into a cylindrical shape with a fixed diameter by the curling member 101 for entering the house. Therefore, when curling, the display film 110 may be scratched or creased.

[0056] In order to overcome the defects in the prior art, the projection screen and projection system provided by the present application can, through the design of the embedded groove, on the one hand, compensate for the height difference formed between the display film and the outer side of the roll in the radial direction of the roll, so that the second layer of display film can smoothly transition at the position of the side close to the edge of the first layer of display film, and can avoid the projection screen after winding up from causing creases or wrinkles on other layers of display film due to the thickness of the first layer of display film when winding up, and can improve the flatness of the projection screen, solve the problem of poor display effect of the curling and lifting projection screen in the related art, improve the display effect of the display film, and further reduce the risk of damage to the display film, thereby increasing the life of the projection screen; on the other hand, when curling, the display film is inserted into the embedded groove for curling, which fixes the display film and prevents the display film from falling during transportation. The present application not only improves the installation stability of the display film 110 and facilitates curling, but also solves the problem of curling marks of the display film 110.

[0057] The contents of the present application will be described in detail below in conjunction with the accompanying drawings so that those skilled in the art can understand the contents of the present application more clearly and in detail.

[0058] Figure 8 A schematic diagram of the structure of a display film in a projection screen provided in an embodiment of the present application, Fig. 9 This is a schematic diagram of the structure of a roller unit in a projection screen provided in an embodiment of the present application. Fig.10 This is a schematic diagram of the assembly of the roller unit and the display film in the projection screen provided by the embodiment of the present application at a first viewing angle, Fig.11 This is a schematic diagram of the assembly of the roller unit and the display film in the projection screen provided by the embodiment of the present application at a second viewing angle, Fig.12 A schematic diagram of the structure of the outer shell of the projection screen provided in an embodiment of the present application.

[0059] like Figures 8 to 12 As shown, the embodiment of the present application provides a projection screen 100, including:

[0060] Display film 110, display film 110 has a projection light receiving surface;

[0061] The reel unit 120 includes a reel 121, and an embedding groove 122 is opened on the reel 121. The notch of the embedding groove 122 faces the outside of the reel 121. Along the winding direction of the display film 110, the notch of the embedding groove 122 has two groove edges, and the two groove edges have a height difference in the radial direction of the reel 121. The end of the display film 110 extends into the embedding groove 122 through the notch of the embedding groove 122, and the display film 110 is attached to the groove wall of the embedding groove 122 close to the center side of the reel 121 so as to be wound on the outer periphery of the reel 121.

[0062] Through the above arrangement, that is, through the design of the embedded groove 122, on the one hand, the height difference between the display film 110 and the outer side of the reel 121 in the radial direction of the reel 121 can be compensated, so that the second layer of the display film 110 can smoothly transition at the position of the side close to the edge of the first layer of the display film 110, and it can be avoided that the projection screen 100 after winding will be creased or wrinkled due to the thickness of the first layer of the display film 110 when winding the other layers of the display film 110, and the flatness of the projection screen 100 can be improved, solving the problem of relative The problem of poor display effect of the curling and lifting projection screen 100 in the related art is solved, the display effect of the display film 110 is improved, and the risk of damage to the display film 110 can be reduced, and the life of the projection screen 100 is increased; on the other hand, when curling, the display film 110 is inserted into the embedding groove 122 for curling, which fixes the display film 110 and prevents the display film 110 from falling during transportation. The present application not only improves the installation stability of the display film 110 and facilitates curling, but also solves the problem of curling marks on the display film 110.

[0063] It should be noted that the projection screen 100 provided in the embodiment of the present application is a screen that can be rolled up and down.

[0064] In addition, it should be noted that the projection screen 100 provided in the embodiment of the present application can be a pull-down projection screen 100, or can be a pull-up projection screen 100. When the projection screen 100 is a pull-down projection screen 100, after the projection screen 100 is set at a preset position, the user can pull the projection screen 100 out of the roll 121 from top to bottom. When the projection screen 100 is a pull-up projection screen 100, after the curling and lifting projection screen 100 is set at a preset position, the user can pull the projection screen 100 out of the roll 121 from bottom to top. In this case, the pulled-out projection screen 100 can be fixed at a preset position (such as a hook on a wall, or the projection screen 100 and the supporting structure layer are fixed by a bracket).

[0065] It should be noted that each structure is described in detail below.

[0066] [Display film 110]

[0067] It should be noted that the front side of the display film 110 can be used to display a projection image.

[0068] The material of the display film 110 may include polyethylene terephthalate (PET).

[0069] In some embodiments, the display film 110 includes an optical film and a flexible carrier, and a surface (eg, a back surface) of the optical film away from the display area is fixed on the flexible carrier.

[0070] [Reel unit 120]

[0071] It should be noted that the display film 110 provided in the embodiment of the present application may include an unfolded state and a stored state, wherein the unfolded state refers to a state in which the display film 110 is not rolled up and wound on the roll 121 and is unfolded outside the roll 121, and the stored state refers to a state in which the display film 110 is rolled up and wound on the roll 121. Of course, the display film 110 may also be partially rolled up and wound on the roll 121, and the embodiment of the present application is not limited to this.

[0072] In some embodiments, the first side and the second side opposite to each other on the flexible carrier are fixedly connected to the roller 121 and the lifting rod, respectively. In this way, the display film 110 can be connected to the roller 121 and the lifting rod through the flexible carrier, and the optical film can also be supported.

[0073] It should be noted that when using an optical film, only the irradiation area corresponding to the projection beam displays the image, so an optical film having an area equal to the irradiation area corresponding to the projection beam can be used, which can reduce the cost of the display film 110. For example, the size of the optical film is 66 mm*9 mm.

[0074] The flexible carrier is a material that is not easily deformed and has a high tensile strength to ensure the curling of the flexible carrier and avoid deformation of the flexible carrier under external force. For example, the flexible carrier is a synthetic fabric made of polyester yarn that is not easily deformed and has a high tensile strength.

[0075] The dimension of the optical film along the length direction of the roll 121 is smaller than the dimension of the flexible carrier along the length direction of the roll 121. In this way, when the flexible carrier and the optical film are fixed (e.g., bonded), the edge of the optical film can be prevented from extending out of the flexible carrier, thereby achieving effective fixation of various parts of the optical film.

[0076] Of course, in some embodiments, the size of the optical film along the length direction of the roll 121 may also be equal to the size of the flexible carrier along the length direction of the roll 121. In this way, when the optical film is fixed, it is convenient to align the edge of the optical film with the edge of the flexible carrier, which is conducive to reducing the size of the display film 110 when the size of the optical film is constant. In addition, when displaying a picture, the display film 110 does not leave a blank space along the length direction of the roll 121, which is conducive to improving the picture display effect of the display film 110.

[0077] It should be noted that when the display film 110 is rolled up, the display film 110 can be rolled up on the roll 121. When the display film 110 is rolled up on the roll 121, the display film 110 is rolled up into multiple layers on the roll 121. Since the PET material is relatively hard and has a certain thickness, the edge of the display film 110 has a thickness, that is, the end of the display film 110 has a thickness.

[0078] When the second layer of display film 110 is rolled up, a fulcrum is formed at the contact point between the second layer of display film 110 and the edge of the first layer of display film 110, resulting in a suspended area on the side of the second layer of display film 110 close to the edge of the first layer of display film 110. The shape and force of the second layer of display film 110 on both sides of the first layer of display film 110 are different. The edge of the first layer of display film 110 will squeeze the second layer of display film 110, causing the display film 110 and the display film 110 of other layers to be deformed.

[0079] Since the two groove edges have a height difference in the radial direction of the roll 121 in the winding direction of the display film 110, the end of the display film 110 extends into the embedding groove 122 and is then attached to the groove wall of the embedding groove 122 close to the center of the roll 121 to compensate for the height difference, so that the second layer of display film 110 can smoothly transition to the position where the edge of the first layer of display film 110 is located, which can prevent the display film 110 from being squeezed by the edge of the display film 110 after winding and causing folds or wrinkles, and can improve the flatness of the display film 110.

[0080] In some optional embodiments, the embedding groove 122 is an arc-shaped groove;

[0081] An angle is formed between the extending direction of the embedding groove 122 and the radial direction of the winding drum 121 .

[0082] It should be noted that such a configuration not only ensures that the display film 110 is inserted into and fixedly installed in the embedding groove 122 , but also can be rolled in the embedding groove 122 according to the shape of the embedding groove 122 to avoid squeezing the display film 110 .

[0083] Display films 110 of different sizes correspond to different process parameters, and the warping degree after production is different. Generally speaking, the larger the size, the greater the warping. The warping of the display film 110 of small size is small, so the depth of the embedded groove 122 is small.

[0084] In some embodiments, in order to avoid creases during the rolling process of the display film 110 , the embedding groove 122 is arranged to be inclined, so that the display film 110 can be attached more smoothly.

[0085] In some optional embodiments, the groove wall of the embedded groove 122 has a smooth section 1221, and an arc section 1222 is provided between the groove opening of the embedded groove 122 and the outer wall of the roller 121. The smooth section 1221 is connected to the arc section 1222, and the display film 110 is sequentially attached to the smooth section 1221 and the arc section 1222.

[0086] It should be noted that it can be ensured that the display film 110 can be smoothly extended into the embedding groove 122 and the outer wall of the winding roll 121 to avoid problems such as extrusion.

[0087] In some embodiments, an angle is formed between the extension direction of the smooth section 1221 and the radial direction of the roller 121 , so that the display film 110 is rolled into the embedding groove 122 according to the shape of the embedding groove 122 to avoid squeezing the display film 110 .

[0088] In some optional embodiments, the roller unit 120 further includes a compensation portion 123, which is located outside the roller 121 and has an embedding groove 122 thereon. The compensation portion 123 is used to compensate for the height difference between the end of the display film 110 and the roller 121 in the radial direction of the roller 121.

[0089] It should be noted that the compensation portion 123 is connected to the outer wall of the roll 121 and is higher than the outer wall of the roll 121, so that the two groove edges have a height difference in the radial direction of the roll 121. The height difference can also be the height difference formed between the end of the display film 110 and the roll 121 in the radial direction of the roll 121. The purpose is to match the thickness of the display film 110 so that the second layer of display film 110 can smoothly transition to the position of the side close to the edge of the first layer of display film 110, which can avoid the projection screen 100 after winding up from creases or wrinkles on other layers of the display film 110 due to the thickness of the first layer of display film 110, and can improve the flatness of the projection screen 100.

[0090] In some optional embodiments, an embedding groove 122 is formed between the inner wall of the compensation portion 123 and the outer wall of the reel 121 .

[0091] It should be noted that the distance between the compensation portion 123 and the center of the roll 121 is greater than the distance between the outer wall of the roll 121 and the center of the roll 121 to compensate for the thickness of a layer of display film 110, wherein, in order to facilitate the accommodation and connection of the display film 110, the display film 110 extends into the embedding groove 122.

[0092] Among them, the embedding groove 122 is formed between the inner wall of the compensation part 123 and the outer wall of the roller 121, so that the roller unit structure is simpler and can accommodate the display film 110, so that the second layer of display film 110 will not produce obvious steps or protrusions when contacting the edge of the first layer of display film 110, thereby achieving a smooth transition. By achieving a smooth transition at the position where the second layer of display film 110 is close to the edge of the first layer of display film 110, the above problems can be effectively avoided, thereby improving the flatness of the entire projection screen 100. The flat projection screen 100 can provide better display effects, reduce image distortion and visual interference, solve the problem of creases or wrinkles that may occur during the winding process of the display film 110, and significantly improve the flatness and display quality of the projection screen 100.

[0093] In some optional embodiments, along the radial direction of the roll 121, the distance between the outer wall of the compensation portion 123 located at the slot opening of the embedded slot 122 and the center of the roll 121 is smaller than the distance between the outer wall of the compensation portion 123 located at the bottom of the embedded slot 122 and the center of the roll 121.

[0094] It should be noted that such a configuration enables the display film 110 to be smoothly wound around the roller and the outer side wall of the compensation portion 123 in sequence, thereby reducing the risk of damage to the display film 110 .

[0095] Along the winding direction of the display film 110, the compensation portion 123 is a special-shaped structure, and the outer wall of the compensation portion 123 is arc-shaped, which matches the outer wall structure of the roller, so that the display film 110 is first wound around the outer periphery of the roller and then wound around the outer wall of the compensation portion 123, and the entire winding process is smooth.

[0096] In some optional embodiments, the projection screen 100 further includes a housing 130 , the housing 130 has a receiving cavity, and the display film 110 is wound around the outer circumference of the roller 121 to be received in the receiving cavity.

[0097] It should be noted that the long-term curling of the display film 110 is achieved, and the display film 110 and the roll 121 are packaged in an integrated manner, which reduces the packaging volume, improves the user experience, and reduces the packaging cost and logistics cost.

[0098] Specifically, the display film 110 is firstly wound around the outer periphery of the reel 121 to form an integrated structure, and then the integrated structure is placed in the housing 130, which can be directly placed in the user's home for installation. It is avoided that the display film 110 and the reel are packaged separately, which may cause the wrong shipment or missing shipment during terminal delivery, or in order to avoid creases on the display film 110, the display film 110 is installed integrally with the reel without being curled, which may cause the entire packaging box to be larger in volume and inconvenient to transport.

[0099] In some optional embodiments, the compensation portion 123 and the reel 121 are an integrally formed structure.

[0100] It should be noted that by arranging the compensation part 123 and the reel 121 to be integrally formed, not only can the connection strength between the compensation part 123 and the reel 121 be improved, but also a seamless connection between the compensation part 123 and the reel 121 can be achieved, thereby reducing the risk of cracking at the connection position between the compensation part 123 and the reel 121, and furthermore, the structure of the reel unit 120 can be simplified, making the manufacturing and processing more convenient and the cost lower.

[0101] It should be noted that, in some embodiments, the compensation part 123 and the reel 121 are connected in an integrated manner, and in other embodiments, the compensation part 123 and the reel 121 can also be connected in other manners. As long as the connection method can fix the compensation part 123 and the reel 121, the purpose of this embodiment can be achieved. Here, there is no restriction on the connection method between the compensation part 123 and the reel 121.

[0102] The projection screen provided by the embodiment of the present application includes a display film, which has a projection light-receiving surface; a drum unit, which includes a drum, on which an embedding groove is provided, and the groove opening of the embedding groove faces the outside of the drum. Along the winding direction of the display film, the groove opening of the embedding groove has two groove edges, and the two groove edges have a height difference in the radial direction of the drum. The end of the display film extends into the embedding groove through the groove opening of the embedding groove, and the display film is attached to the groove wall of the embedding groove close to the center of the drum so as to be wound around the outer periphery of the drum.

[0103] Through the design of the embedded groove, on the one hand, the height difference between the display film and the outer side of the roll in the radial direction of the roll can be compensated, so that the second layer of display film can smoothly transition at the position of the side close to the edge of the first layer of display film, and the projection screen after winding can be prevented from having creases or wrinkles on other layers of display film due to the thickness of the first layer of display film. The flatness of the projection screen can be improved, and the problem of poor display effect of the rolled-up and lifted projection screen in the related art is solved, and the display effect of the display film is improved, thereby reducing the risk of damage to the display film and increasing the life of the projection screen; on the other hand, when curling, the display film is inserted into the embedded groove for curling, which fixes the display film and prevents the display film from falling during transportation. The present application not only improves the installation stability of the display film 110 and facilitates curling, but also solves the problem of curling marks of the display film 110.

[0104] In addition, the embodiment of the present application further provides a projection screen 100, including:

[0105] Display film 110;

[0106] The reel 121 has an embedding groove 122 , and the display film 110 extends into the embedding groove 122 to be wound around the outer circumference of the reel 121 .

[0107] Through the design of the embedding groove 122, on the one hand, the height difference between the display film 110 and the outer side of the reel 121 in the radial direction of the reel 121 can be compensated, so that the second layer of the display film 110 can smoothly transition at the position of the side close to the edge of the first layer of the display film 110, and the projection screen 100 after winding can be prevented from generating creases or wrinkles on the display films 110 of other layers due to the thickness of the first layer of the display film 110 when winding, and the flatness of the projection screen 100 can be improved, which solves the problem of poor display effect of the curling and lifting projection screen 100 in the related art, improves the display effect of the display film 110, and further reduces the risk of damage to the display film 110, thereby improving the life of the projection screen 100; on the other hand, when curling, the display film 110 is inserted into the embedding groove 122 for curling, which fixes the display film 110 and prevents the display film 110 from falling during transportation. The present application not only improves the installation stability of the display film 110 and facilitates curling, but also solves the problem of curling marks of the display film 110.

[0108] Fig.13 A schematic diagram of the structure of a projection system provided in an embodiment of the present application is shown in FIG. Fig.13 As shown, an embodiment of the present application further provides a projection system 200 , which is characterized by comprising a projection device 210 and the above-mentioned projection screen 100 , and the projection device 210 is used to project a projection picture onto the projection screen 100 .

[0109] The projection system 200 may include a curling and lifting projection screen 100 and a projection device 210. The curling and lifting projection screen 100 may be the curling and lifting projection screen 100 in any of the above embodiments. The front of the curling and lifting projection screen 100 may be a Fresnel structure.

[0110] The projection device 210 may include a projection host, and the projection host is used to emit a light beam.

[0111] When the projection device 210 is not in use, the display film 110 is rolled up by the control mechanism, thereby reducing 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 reflects the light beam emitted by the projection host and displays the picture. When the display film 110 is in the unfolded state, since the guide member is pressed against the display film 110 and limits the pitch angle of the display film 110, the display film 110 can be limited to the correct position by the guide member, thereby avoiding the picture displayed on the display film 110 from being distorted, blurred, and distorted, thereby improving the display effect of the projection screen 100.

[0112] It should be noted that a projection host is installed in the projection device 210, and the projection host may be an ultra-short-throw projection host, and the ultra-short-throw projection host may be a DLP (Digital Light Procession) projection host. In this way, the distance between the projection host and the plane where the diaphragm body 111 is located is set to a shorter distance, so as to realize the miniaturization design of the entire projection device 210.

[0113] The projection host may include: a light source, an optical machine 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 radiator. The light source is used to emit a light beam to the optical machine. The light source and the lens are fixedly connected to the optical machine. The DMD chip is arranged in the optical machine. The DMD chip, the audio processing system and the heat dissipation system are electrically connected to the control circuit board respectively. The audio processing system is also electrically connected to the speaker, and the heat dissipation system is also electrically connected to the radiator.

[0114] In this way, the light beam emitted by the light source reaches the DMD chip in the optical machine system, and the control circuit board controls the DMD chip to modulate the light beam emitted to the DMD chip, and the modulated light beam carries the image information output by the control circuit board and emits it to the lens, and then the light beam is emitted through the lens to the display film 110 included in the projection screen 100 for display. In addition, the control circuit board controls the audio processing system to process the audio information output by the control circuit board, and plays the processed audio information out through the speakers. When displaying image information and playing audio information out, the control circuit board can control the heat dissipation system to drive the radiator to dissipate heat to avoid high temperature affecting the functions of various components.

[0115] The projection device 210 further includes a storage portion 211, which is used to store the projection host and the curling and lifting projection screen 100. The storage portion 211 may have a light-transmitting area 2111 and an opening 2112, and the light beam emitted by the projection host can pass through the light-transmitting area 2111, and the projection screen 100 passes through the opening 2112 and unfolds. In this way, when the projection device 210 is not in use, the projection host and the curling and lifting projection screen 100 are stored in the storage portion 211, which is convenient for saving space. When the projection device 210 is in use, the projection screen 100 is unfolded, and the projection host projects a light beam onto the projection screen 100, so that the projection screen 100 displays the projection picture.

[0116] 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 projection host and the width of the display area on the display film 110, and 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 to the display area of ​​the display film 110, so as to ensure the clarity of the display image on the display film 110.

[0117] Since the projection ratio is a performance parameter of the projection host itself, the projection ratio of the projection host is related to the selected projection host, that is, if different projection hosts are selected, the projection ratio will be different, and thus the vertical distance from the center point of the light-transmitting area 2111 to the plane where the unfolded projection screen 100 is located will also be different.

[0118] In this way, during the actual setting process, the vertical distance from the center point of the light-transmitting area 2111 to the plane where the unfolded projection screen 100 is located is calculated based on the projection ratio of the projection host and the width of the display area, thereby ensuring that the light beam emitted by the projection host can be completely projected onto the display area of ​​the projection screen 100.

[0119] Through the design of the embedded groove, on the one hand, the height difference between the display film and the outer side of the roll in the radial direction of the roll can be compensated, so that the second layer of display film can smoothly transition at the position of the side close to the edge of the first layer of display film, and the projection screen after winding can be prevented from having creases or wrinkles on other layers of display film due to the thickness of the first layer of display film. The flatness of the projection screen can be improved, and the problem of poor display effect of the rolled and lifted projection screen in the related art is solved, and the display effect of the display film is improved, thereby reducing the risk of damage to the display film and increasing the life of the projection screen; on the other hand, when curling, the display film is inserted into the embedded groove for curling, which fixes the display film and prevents the display film from falling during transportation. The present application not only improves the installation stability of the display film and facilitates curling, but also solves the problem of curling marks on the display film.

[0120] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0121] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A projection screen, characterized in that: include: A display film, wherein the display film has a projection light receiving surface; A reel unit, wherein the reel unit includes a reel, an embedding groove is provided on the reel, the notch of the embedding groove faces the outside of the reel, and along the winding direction of the display film, the notch of the embedding groove has two groove edges, and the two groove edges have a height difference in the radial direction of the reel, the end of the display film extends into the embedding groove through the notch of the embedding groove, and the display film is attached to the groove wall of the embedding groove close to the center of the reel so as to be wound around the outer periphery of the reel.

2. The projection screen according to claim 1, characterized in that: The embedding groove is an arc-shaped groove; An angle is formed between the extending direction of the embedding groove and the radial direction of the winding drum.

3. The projection screen according to claim 1, characterized in that: The groove wall of the embedding groove has a smooth section, and there is an arc section between the groove opening of the embedding groove and the outer side wall of the roller, the smooth section is connected to the arc section, and the display film is sequentially attached to the smooth section and the arc section.

4. The projection screen according to any one of claims 1 to 3, characterized in that: The roll unit further comprises a compensation part, which is located outside the roll and has the embedding groove formed thereon. The compensation part is used to compensate for the height difference between the end of the display film and the roll in the radial direction of the roll.

5. The projection screen according to claim 4, characterized in that: The embedding groove is formed between the inner side wall of the compensation portion and the outer side wall of the reel.

6. The projection screen according to claim 4, characterized in that: Along the radial direction of the drum, the distance between the outer side wall of the compensation portion located at the slot opening of the embedding slot and the center of the drum is smaller than the distance between the outer side wall of the compensation portion located at the slot bottom of the embedding slot and the center of the drum.

7. The projection screen according to any one of claims 1 to 3, characterized in that: The projection screen further comprises a shell having a containing cavity, and the display film is wound around the outer circumference of the roller to be contained in the containing cavity.

8. The projection screen according to claim 4, characterized in that: The compensation portion and the reel are an integrally formed structure.

9. A projection screen, characterized in that: include: Display diaphragm; A reel is provided with an embedding groove, and the display film extends into the embedding groove so as to be wound around the outer periphery of the reel.

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

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