Display screen and projection device

Abstract

The present application discloses a display screen and a projection device, belonging to the technical field of screen display. The display screen includes: a backplane, an optical film, and a frame; the frame wraps the side surface of the backplane and the edge of the optical film, and the optical film is fixed on the backplane; the surface of the optical film away from the backplane protrudes from the frame or is flush with the frame, and the surface of the backplane away from the optical film protrudes from the frame or is flush with the frame. For the display screen provided in the present application, the thickness of the display screen is determined by the thickness of the backplane and the optical film, and the frame does not affect the thickness of the display screen. Therefore, by separately reducing the thicknesses of the backplane and the optical film, the ultra-thinning of the display screen can be well achieved.

Description

Technical Field

[0001] This application relates to the technical field of screen display, and particularly relates to a display screen and a projection device. Background Art

[0002] In recent years, in order to improve the aesthetics of display screens, display screens are developing towards the trend of being ultrathin. Since display screens mainly include a backplane and optical films, currently, the ultrathinness of display screens is usually achieved by reducing the thickness of the backplane.

[0003] As Figure 1 shown, in addition to including a backplane 100 and optical films 101, the display screen further includes an adhesive layer 102 and a frame 103. The optical films 101 are adhered to the backplane 100 through the adhesive layer 102. The frame 103 surrounds the edges of the backplane 100, the adhesive layer 102, and the optical films 101, and wraps the optical films 101, the adhesive layer 102, and the backplane 100. Thus, as can be seen from the attached Figure 1 figure, the thicknesses of the backplane 100, the optical films 101, and the frame 103 are all the main factors affecting the thickness of the display screen. Therefore, simply reducing the thicknesses of the backplane 100 and the optical films 101 cannot well achieve the ultrathinness of the display screen. Summary of the Invention

[0004] This application provides a display screen and a projection device, which can solve the problem that the ultrathinness of the display screen cannot be well achieved by simply reducing the thicknesses of the backplane and the optical films. The technical solutions are as follows:

[0005] On the one hand, a display screen is provided. The display screen includes: a backplane, optical films, and a frame;

[0006] The frame wraps the side surface of the backplane and the edges of the optical films, and the optical films are fixed on the backplane;

[0007] The surface of the optical films away from the backplane protrudes from the frame or is flush with the frame, and the surface of the backplane away from the optical films protrudes from the frame or is flush with the frame.

[0008] Optionally, the inner wall of the frame has a stepped structure in the thickness direction to form two inner ring surfaces;

[0009] The first inner ring surface is fixedly connected to the side surface of the backplane. The first inner ring surface refers to one of the two inner ring surfaces that is away from the outer wall of the frame;

[0010] The second inner ring surface is fixedly connected to the edges of the optical films. The second inner ring surface refers to one of the two inner ring surfaces that is close to the outer wall of the frame.

[0011] Optionally, the inner wall of the frame is in a stepped structure in the thickness direction to form two inner ring surfaces, and the edge of the back plate is in a stepped structure in the thickness direction to form two outer ring surfaces;

[0012] The first inner ring surface is fixedly connected to the first outer ring surface. The first inner ring surface refers to one of the two inner ring surfaces that is away from the outer wall of the frame, and the first outer ring surface refers to one of the two outer ring surfaces that is close to the center of the back plate;

[0013] The second inner ring surface is fixedly connected to the second outer ring surface and the edge of the optical film respectively. The second inner ring surface refers to one of the two inner ring surfaces that is close to the outer wall of the frame, and the second outer ring surface refers to one of the two outer ring surfaces that is away from the center of the back plate.

[0014] Optionally, the frame border includes an insertion part;

[0015] The insertion part is vertically fixed on the second inner ring surface. The insertion part is clamped between the optical film and the back plate and can seal the gap between the optical film and the back plate.

[0016] Optionally, the frame includes two opposite surfaces. The first surface of the two surfaces is in a conical structure. The first surface refers to the surface on the same side as the surface of the optical film that is away from the back plate.

[0017] Optionally, the frame border is a hollow structure.

[0018] Optionally, the cross-section of the inner cavity of the border is circular or rectangular.

[0019] Optionally, a first groove ring is provided on the stepped surface of the frame, and a boss ring matching the first groove ring is provided on the stepped surface of the back plate. The boss ring is clamped in the first groove ring.

[0020] Optionally, a first serrated structure is provided on the first inner ring surface in the thickness direction, and a second serrated structure is provided on the first outer ring surface of the back plate in the thickness direction. The first serrated structure and the second serrated structure match each other.

[0021] On the other hand, a display screen is provided. The display screen includes: a back plate, an optical film and a frame;

[0022] The frame wraps the edge of the back plate, and the optical film is fixed on the back plate;

[0023] The surface of the backplane near the optical film protrudes from the frame or is flush with the frame; the surface of the backplane away from the optical film protrudes from the frame or is flush with the frame.

[0024] Optionally, the inner wall of the frame has a stepped structure in the thickness direction, and the edge of the backplane has a stepped structure in the thickness direction. The stepped surface of the backplane is fixedly connected to the stepped surface of the frame.

[0025] In another aspect, a projection device is provided. The projection device includes a projection host and the display screen described in the above-mentioned one aspect, or the display screen described in the above-mentioned other aspect.

[0026] The projection host is located on the side of the display screen close to the optical film, and the light outlet of the projection host faces the display screen.

[0027] The projection host is configured to emit a light beam to the display screen, and the display screen is configured to receive the light beam emitted by the projection host and perform screen display.

[0028] The beneficial effects brought by the technical solution provided by the embodiments of the present application may at least include:

[0029] In the embodiments of the present application, the surface of the optical film away from the backplane protrudes from the frame, and the surface of the backplane away from the optical film protrudes from the frame or is flush with the frame. That is to say, the thickness of the frame is less than the sum of the thicknesses of the optical film and the backplane, and the frame does not protrude from the surfaces of the optical film and the backplane. In other words, the thickness of the display screen is determined by the thicknesses of the optical film and the backplane. Therefore, the thinning of the display screen can be achieved by separately reducing the thicknesses of the optical film and the backplane. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 is a schematic structural diagram of a display screen provided in the related art;

[0032] Figure 2 is an exploded view of a display screen provided in the embodiments of the present application;

[0033] Figure 3 is a partially enlarged view of a display screen provided in the embodiments of the present application;

[0034] Figure 4 It is a partial enlarged view of another display screen provided by an embodiment of the present application;

[0035] Figure 5 It is an exploded view of another display screen provided by an embodiment of the present application;

[0036] Figure 6 It is a cross-sectional view of a frame provided by an embodiment of the present application;

[0037] Figure 7 It is a cross-sectional view of another frame provided by an embodiment of the present application;

[0038] Figure 8 It is a cross-sectional view of yet another frame provided by an embodiment of the present application;

[0039] Figure 9 It is a cross-sectional view of still another frame provided by an embodiment of the present application;

[0040] Figure 10 It is a partial enlarged view of another display screen provided by an embodiment of the present application;

[0041] Figure 11 It is a cross-sectional view of a frame and a seal provided by an embodiment of the present application;

[0042] Figure 12 It is a cross-sectional view of another frame and a seal provided by an embodiment of the present application;

[0043] Figure 13 It is a cross-sectional view of yet another frame and a seal provided by an embodiment of the present application;

[0044] Figure 14 It is an installation schematic diagram of another display screen provided by an embodiment of the present application;

[0045] Figure 15 It is a partial enlarged view of another display screen provided by an embodiment of the present application;

[0046] Figure 16 It is a partial enlarged view of another display screen provided by an embodiment of the present application;

[0047] Figure 17 It is a partial enlarged view of another display screen provided by an embodiment of the present application;

[0048] Figure 18 It is a partial enlarged view of still another display screen provided by an embodiment of the present application;

[0049] Figure 19 It is a structural schematic diagram of a projection device provided by an embodiment of the present application.

[0050] Related technical reference numerals:

[0051] 100: Backplane; 101: Optical film; 102: Adhesive layer; 103: Frame.

[0052] Reference numerals in this application:

[0053] 1: Backplane; 2: Optical film; 3: Frame; 4: Mounting surface;

[0054] 11: First outer ring surface; 12: Second outer ring surface; 13: First step; 14: Second step; 15: First connecting portion; 41: Second connecting portion;

[0055] 30: Bounding frame; 31: First inner ring surface; 32: Second inner ring surface; 33: First surface; 34: First groove ring; 35: Second groove ring;

[0056] 301: Inner cavity; 302: Insertion portion;

[0057] 311: First serrated structure;

[0058] 3021: First elastic member; 3022: Second elastic member;

[0059] 30211: First substrate; 30212: First strip-shaped protrusion;

[0060] 30221: Second substrate; 30222: Second strip-shaped protrusion;

[0061] 1000: Projection host; 2000: Display screen. Detailed implementation manners

[0062] To make the objectives, technical solutions, and advantages of this application clearer, the following will further describe the implementation manners of this application in detail with reference to the accompanying drawings.

[0063] Figure 2 is an exploded view of a display screen provided by an embodiment of this application, Figure 3 is a partially enlarged view of a display screen provided by an embodiment of this application. Refer to Figure 2 and Figure 3 , the display screen may include: a backplane 1, an optical film 2, and a frame 3. The frame 3 wraps the side surface of the backplane 1 and the edge of the optical film 2, and the optical film 2 is fixed on the backplane 1. The surface of the optical film 2 away from the backplane 1 protrudes from the frame 3 or is flush with the frame 3, and the surface of the backplane 1 away from the optical film 2 protrudes from the frame 3 or is flush with the frame 3.

[0064] In the embodiments of the present application, the surface of the optical film 2 away from the backplane 1 protrudes from the frame 3, the surface of the backplane 1 away from the optical film 2 protrudes from the frame 3, or is flush with the frame 3. That is to say, the thickness of the frame 3 is less than the sum of the thicknesses of the optical film 2 and the backplane 1 and the frame 3 does not protrude from the surfaces of the optical film 2 and the backplane 1. In other words, the thickness of the display screen is determined by the thicknesses of the optical film 2 and the backplane 1. Therefore, the thinness and lightness of the display screen can be achieved by separately reducing the thicknesses of the optical film 2 and the backplane 1.

[0065] Among them, the optical film 2 can be fixed to the backplane 1 by double-sided tape. Of course, the optical film 2 can also be fixed to the backplane 1 by other means, and the embodiments of the present application do not make specific limitations in this regard.

[0066] Among them, double-sided tape can be provided between the frame 3 and the backplane 1. In this way, when the frame 3 wraps the side surface of the backplane 1, the fixed connection between the frame 3 and the backplane 1 can be realized. Of course, the frame 3 can also be fixedly connected to the backplane 1 by other means. For example, the frame 3 can be fixedly connected to the backplane 1 by screws, and the embodiments of the present application do not make specific limitations in this regard.

[0067] When the frame 3 is fixedly connected to the backplane 1 by screws, in some embodiments, threaded holes can be provided on the side surface of the backplane 1, and countersunk holes can be provided on the frame 3. In this way, the screws can pass through the frame 3 and be fixed in the threaded holes of the backplane 1, and the heads of the screws can sink into the countersunk holes.

[0068] In some embodiments, the optical film 2 is fixed to the backplane 1, the first projection covers the second projection, and the distance between the edge of the first projection and the edge of the second projection is less than 1 mm. Among them, the first projection refers to the projection of the backplane 1 and the frame 3 in the thickness direction of the backplane 1, and the second projection refers to the projection of the optical film 2 in the thickness direction of the backplane 1. The surface of the optical film 2 away from the backplane 1 protrudes from the frame 3, the surface of the backplane 1 away from the optical film 2 protrudes from the frame 3, or is flush with the frame 3.

[0069] Next, the embodiments of the present application will make a detailed description of the possible positional relationships among the backplane 1, the optical film 2, and the frame 3.

[0070] In some embodiments, see Figure 2 and 3 , the inner wall of the frame 3 is in a stepped structure along the thickness direction to form two inner ring surfaces. The first inner ring surface 31 is fixedly connected to the side surface of the backplane 1. The first inner ring surface 31 refers to one of the two inner ring surfaces that is away from the outer wall of the frame 3. The second inner ring surface 32 is fixedly connected to the edge of the optical film 2. The second inner ring surface 32 refers to one of the two inner ring surfaces that is close to the outer wall of the frame.

[0071] Among them, the first inner ring surface 31 can be fixedly connected to the side surface of the back plate 1 through double-sided adhesive. Of course, the first inner ring surface 31 can also be fixedly connected to the side surface of the back plate 1 in other ways. For example, the side surface of the back plate 1 can be fixedly connected to the first inner ring surface 31 through screws. The embodiments of the present application do not make specific limitations on this.

[0072] When the side surface of the back plate 1 is fixedly connected to the first inner ring surface 31 through screws, in some embodiments, threaded holes can be provided on the side surface of the back plate 1, and counterbore holes can be provided on the surface of the first inner ring surface 31 of the frame 3 opposite to each other. In this way, the screw can pass through the threaded hole fixed to the back plate 1 with the frame 3, and the head of the screw can sink into the counterbore hole.

[0073] In addition, the second inner ring surface 32 can be fixedly connected to the edge of the optical film 2 through double-sided adhesive. Of course, the second inner ring surface 32 can also be fixedly connected to the edge of the optical film 2 in other ways. The embodiments of the present application do not make specific limitations on this.

[0074] In some other embodiments, refer to Figure 4 and Figure 5 , the inner wall of the frame 3 is in a stepped structure along the thickness direction to form two inner ring surfaces, and the edge of the back plate 1 is in a stepped structure along the thickness direction to form two outer ring surfaces. The first inner ring surface 31 is fixedly connected to the first outer ring surface 11. The first inner ring surface 31 refers to one of the two inner ring surfaces that is far from the outer wall of the frame 3, and the first outer ring surface 11 refers to one of the two outer ring surfaces that is close to the center of the back plate 1. The second inner ring surface 32 is fixedly connected to the second outer ring surface 12 and the edge of the optical film 2 respectively. The second inner ring surface 32 refers to one of the two inner ring surfaces that is close to the outer wall of the frame 3, and the second outer ring surface 12 refers to one of the two outer ring surfaces that is far from the center of the back plate 1.

[0075] Among them, the first inner ring surface 31 and the first outer ring surface 11 can be fixedly connected through double-sided adhesive. Of course, the first inner ring surface 31 and the first outer ring surface 11 can also be fixedly connected in other ways. The embodiments of the present application do not make specific limitations on this. In addition, the second inner ring surface 32 can be fixedly connected to the second outer ring surface 12 and the edge of the optical film 2 respectively through double-sided adhesive. Of course, the second inner ring surface 32 can also be fixedly connected to the second outer ring surface 12 and the edge of the optical film 2 respectively in other ways. The embodiments of the present application do not make specific limitations on this either.

[0076] In addition, the area of the above-mentioned optical film 2 can be equal to the area of the region enclosed by the second inner ring surface 32 of the frame 3. In other words, the edge of the optical film 2 can just abut against the second inner ring surface 32, so that gaps between the side surface of the optical film 2 and the second inner ring surface 32 can be avoided, preventing foreign matters such as dust from entering the gap between the optical film 2 and the back plate 1 through this gap, and thus affecting the display effect of the display screen.

[0077] Furthermore, the side surface of the optical film 2 and the second inner ring surface 32 can be fixedly connected by double-sided tape, which can further avoid the appearance of gaps between the side surface of the optical film 2 and the second inner ring surface 32, and thus better prevent foreign matters such as dust from entering the display screen.

[0078] In some embodiments, referring to Figure 3 , the frame may include two relatively arranged surfaces, and the first surface 33 of the two surfaces is in a conical structure. The first surface 33 refers to the surface on the same side as the surface of the optical film 2 away from the back plate 1. In this way, when the viewer views the display screen straight on from the side of the display screen where the optical film is located, it can be seen that the first surface 33 gradually shrinks in a conical shape to the side surface of the optical film 2, weakening the presence of the first surface 33, thereby forming a "borderless" visual experience and improving the viewing effect of the display screen.

[0079] Among them, in some embodiments, the vertical distance between the surface of the optical film 2 away from the back plate 1 and the first intersection line is in the range of 0.1 mm - 0.6 mm. The first intersection line refers to the intersection line between the first surface 33 and the outer wall of the frame 3. Of course, the vertical distance between the surface of the optical film 2 away from the back plate 1 and the first intersection line can also be in other distance ranges, and the embodiments of the present application do not make specific limitations in this regard.

[0080] In addition to the first intersection line formed between the first surface 33 and the outer wall of the frame 3, a second intersection line is also formed between the first surface 33 and the optical film 2. In some embodiments, the second intersection line formed between the first surface 33 and the optical film 2 can be flush with the surface of the optical film 2 away from the back plate 1, so that the entire display screen will look more regular. Of course, the second intersection line formed between the first surface 33 and the optical film 2 may not be flush with the surface of the optical film 2 away from the back plate 1, and the embodiments of the present application do not make specific limitations in this regard.

[0081] It can be understood that for the entire display screen, the frame generally plays a role in protecting the back plate 1 and the optical film 2, increasing the strength of the entire display screen, and preventing the display screen from breaking. That is, the strength of the frame 3 affects the strength of the entire display screen.

[0082] Therefore, the strength of the frame 3 is crucial to the strength of the display screen. It should be noted that the strength of the frame 3 is determined by the ratio of the shear modulus to the weight of the frame 3. The larger the ratio of the shear modulus to the weight, the higher the strength of the frame 3. It can be seen that appropriately reducing the weight of the frame 3 can increase the ratio of the shear modulus to the weight, and thus increase the strength of the frame 3. Based on this, in some embodiments, the frame 30 of the frame 3 can be a hollow structure. By setting the frame 30 included in the frame 3 as a hollow structure, the weight of the frame 3 can be reduced, and thus the ratio of the shear modulus to the weight can be increased and the strength of the frame 3 can be enhanced.

[0083] Among them, in some embodiments, referring to Figure 6 and Figure 7 , the cross-section of the inner cavity 301 of the frame 30 can be circular or rectangular. Of course, the cross-section of the inner cavity 301 can also be other shapes, and the embodiments of the present application do not make specific limitations thereto.

[0084] In other embodiments, referring to Figure 8 , the weight of the frame 3 can be reduced by setting a first groove ring 34 on the step surface of the frame 3. Specifically, a first groove ring 34 can be provided on the step surface of the frame 3. Correspondingly, a boss ring matching the first groove ring 34 can be provided on the step surface of the back plate 1, and the boss ring is clamped in the first groove ring 34. In this way, on the one hand, the weight of the frame 3 can be reduced by setting the first groove ring 34, and the strength of the frame 3 can be increased. On the other hand, since a boss ring matching the first groove ring 34 is provided on the step surface of the back plate 1, and the first groove ring 34 and the boss ring match each other, the contact area between the back plate 1 and the frame 3 can also be increased, so that the frame 3 can be more firmly fixed on the back plate 1.

[0085] Furthermore, referring to Figure 8 , a second groove ring 35 can also be provided on the surface of the frame 3 opposite to the step surface of the frame 3, which can further reduce the weight of the frame 3 and further increase the strength of the frame 3.

[0086] In still other embodiments, referring to Figure 9 , in order to reduce the weight of the frame 3, a first serrated structure 311 can be provided on the first inner ring surface 31 of the frame 3 along the thickness direction. Correspondingly, a second serrated structure is provided on the side surface of the back plate 1 along the thickness direction, and the first serrated structure 311 and the second serrated structure match each other. In this way, in addition to reducing the weight of the frame 3 and increasing the strength of the frame 3, the contact area between the back plate 1 and the frame 3 can also be increased, so that the frame 3 can be more firmly fixed on the back plate 1.

[0087] It should be noted that the above-mentioned ways to increase the strength of the frame 3 are only several possible ways shown in the embodiments of the present application to increase the strength of the frame 3. Of course, the strength of the frame 3 can also be increased by other means, that is, as long as the strength of the frame 3 can be increased, the embodiments of the present application do not specifically limit the ways to increase the strength of the frame 3.

[0088] In some embodiments, referring to Figure 10 , the border 30 of the frame 3 includes an insertion portion 302. The insertion portion 302 is vertically fixed on the second inner ring surface 32. The insertion portion 302 is clamped between the optical film 2 and the back plate 1 and can seal the gap between the optical film 2 and the back plate 1. In this way, when fine dust enters the tiny gaps between the frame 3 and the back plate 1 and between the frame 3 and the optical film 2, under the action of the insertion portion 302, it cannot continue to enter the gap between the optical film 2 and the back plate 1, so the situation where fine dust seriously affects the display effect of the display screen can be avoided.

[0089] In some embodiments, the thickness of the insertion portion 302 in the thickness direction of the frame 3 is not greater than 0.1 mm. Of course, in different application scenarios, the thickness of the insertion portion 302 in the thickness direction of the frame 3 can also be other values, as long as the gap between the optical film 2 and the back plate 1 can be sealed, and the embodiments of the present application do not specifically limit this.

[0090] In addition, the material of the insertion portion 302 can be elastic rubber, so that it can better play the role of sealing the gap between the optical film 2 and the back plate 1. Of course, the material of the insertion portion 302 can also be other materials, and the embodiments of the present application do not specifically limit this.

[0091] In some embodiments, referring to Figure 11 , the insertion portion 302 may include a first elastic member 3021 and a second elastic member 3022. The first side of the first elastic member 3021 and the first side of the second elastic member 3022 are fixedly connected to the border 30. The distance between the first side of the first elastic member 3021 and the first side of the second elastic member 3022 is less than or equal to the distance between the second side of the first elastic member 3021 and the second side of the second elastic member 3022. The distance between the second side of the first elastic member 3021 and the second side of the second elastic member 3022 can be reduced under the action of an external force. The first side and the second side of the first elastic member 3021 are opposite to each other, and the first side and the second side of the second elastic member 3022 are opposite to each other. The first elastic member 3021 abuts on the surface of the optical film 2 close to the back plate 1, and the second elastic member 3022 abuts on the surface of the back plate 1 close to the optical film 2.

[0092] In other words, when the distance between the first side of the first elastic member 3021 and the first side of the second elastic member 3022 is less than the distance between the second side of the first elastic member 3021 and the second side of the second elastic member 3022, the cross-section of the insertion portion 302 is in a "V" shape. When the distance between the first side of the first elastic member 3021 and the first side of the second elastic member 3022 is equal to the distance between the second side of the first elastic member 3021 and the second side of the second elastic member 3022, the cross-section of the insertion portion 302 is in a "U" shape.

[0093] When inserting the above insertion portion 302 between the optical film 2 and the backplane 1, in one possible implementation, an external force can be applied to the second side of the first elastic member 3021 and the second side of the second elastic member 3022 first, so that the distance between the second side of the first elastic member 3021 and the second side of the second elastic member 3022 is reduced under the action of the external force. At this time, the second side of the first elastic member 3021 and the second side of the second elastic member 3022 can be integrally inserted between the optical film 2 and the backplane 1. Then, the first elastic member 3021 will abut against the surface of the optical film 2 close to the backplane 1, and the second elastic member 3022 abuts against the surface of the backplane 1 close to the optical film 2. That is, the gap between the optical film 2 and the backplane 1 is sealed.

[0094] It should be noted that the first side of the first elastic member 3021 and the first side of the second elastic member 3022 can both be fixedly connected to the frame 30 through double-sided tape. Of course, in some embodiments, the first side of the first elastic member 3021 and the first side of the second elastic member 3022 can also be integrally formed with the frame 30. The embodiments of the present application do not make specific limitations on this.

[0095] Furthermore, in some embodiments, refer to Figure 12 , the first elastic member 3021 may include a first substrate 30211 and one or more first strip-shaped protrusions 30212. One or more first strip-shaped protrusions 30212 are disposed on the surface of the first substrate away from the second elastic member 3022, and the length direction of each first strip-shaped protrusion 30212 is parallel to the length direction of the first substrate 30211. One or more first strip-shaped protrusions 30212 abut against the surface of the optical film 2 close to the backplane 1. In this way, by providing one or more first strip-shaped protrusions 30212 on the first substrate 30211, the first elastic member 3021 can better abut against the optical film 2, and further better seal the gap between the first elastic member 3021 and the optical film 2.

[0096] Even further, by the same token, in some embodiments, refer to Figure 12, the second elastic member 3022 may include a second substrate 30221 and one or more second strip-shaped protrusions 30222. The one or more second strip-shaped protrusions 30222 are disposed on a surface of the second substrate 30221 away from the first elastic member 3021, and the length direction of each second strip-shaped protrusion 30222 is parallel to the length direction of the second substrate 30221. The one or more second strip-shaped protrusions 30222 abut against a surface of the back plate 1 close to the optical diaphragm 2. In this way, by providing the one or more second strip-shaped protrusions 30222 on the second substrate 30221, the second elastic member 3022 can better abut against the back plate 1, and further better seal the gap between the second elastic member 3022 and the back plate 1.

[0097] It should be noted that the number of the first strip-shaped protrusions 30212 and the second strip-shaped protrusions 30222 may both be 1. Of course, the number of the first strip-shaped protrusions 30212 and the second strip-shaped protrusions 30222 may also be other numbers, and the embodiments of the present application do not make specific limitations thereto.

[0098] In addition, referring to Figure 12 and Figure 13 , the cross section of each first strip-shaped protrusion 30212 may be in an inverted hook shape. Of course, the cross section of each first strip-shaped protrusion 30212 may also be other shapes. For example, the cross section of each first strip-shaped protrusion 30212 may be in a semi-circular shape, and the embodiments of the present application do not make specific limitations thereto.

[0099] In some embodiments, as Figure 14 shown, one or more first connection portions 15 are provided on a side of the back plate 1 away from the optical diaphragm. The back plate 1 is used for embedded fixed connection with one or more second connection portions 41 correspondingly provided on the mounting surface 4 through the one or more first connection portions 15. After each first connection portion 15 is fixedly connected to the corresponding second connection portion 41, the distance between the side of the back plate 1 away from the optical diaphragm and the mounting surface 4 is less than 1 mm.

[0100] Wherein, the mounting surface 4 may be a plane composed of a fixing bracket or a wall surface of a wall, etc., as long as the fixing of the back plate 1 can be realized.

[0101] It should be noted that, in order to achieve the stability of the connection between the mounting surface 4 and the back plate 1, each first connection portion 15 may be seamlessly bonded to the corresponding second connection portion 41.

[0102] Among them, each first connecting portion 15 and a corresponding second connecting portion 41 can be bonded together by an adhesive. Exemplarily, a double-sided adhesive can be used to bond between the first connecting portion 15 and a corresponding second connecting portion 41. Of course, an adhesive with buffering and vibration damping capabilities can also be selected for bonding, so as to avoid the back plate 1 from vibrating and generating noise. Exemplarily, a foam adhesive can be used to bond between the first connecting portion 15 and a corresponding second connecting portion 41.

[0103] Of course, in addition to being fixed by bonding, each first connecting portion 15 and a corresponding second connecting portion 41 can also be fixedly connected by magnetic attraction, so as to facilitate the separation of the back plate 1 from the mounting surface 4.

[0104] In some embodiments, at least one groove exists in one or more first connecting portions 15. Correspondingly, at least one boss corresponding to the at least one groove exists in one or more second connecting portions 41, and each boss can extend into a corresponding groove.

[0105] Among them, the depth of each groove can be between 0.5 times and 0.75 times the thickness of the back plate 1. In this way, it is possible to avoid the problem that the groove depth is too shallow resulting in insecure fixation, and the problem that the groove depth is too deep resulting in insufficient strength of the back plate 1. Of course, the depth of each groove can also be slightly adjusted according to the actual situation, as long as the screen can be stably fixed and the strength of the back plate 1 is appropriate. The embodiments of the present application do not limit this.

[0106] Among them, the boss can be pre-fixed on the mounting surface 4 by a fixing member. Exemplarily, the fixing member can be a countersunk screw. Of course, the boss can also be integrally formed with the mounting surface 4, which can ensure that the boss has stronger stability and at the same time reduce the assembly steps.

[0107] Among them, the groove and the corresponding boss can be inclinedly arranged in the depth direction and the height direction respectively. That is, the bottom end of the groove can be higher than the opening end of the groove, and correspondingly, the top end of the boss can be higher than the bottom end of the boss. In this way, the boss can exert a supporting force perpendicular to the contact surface on the groove, and this supporting force has a component force pointing to the second connecting portion 41, and this component force can further enhance the fitting effect between the back plate 1 and the mounting surface 4, and further enable the back plate 1 to be more firmly fixed on the mounting surface 4.

[0108] In some other embodiments, at least one boss exists in one or more first connecting portions 15. Correspondingly, at least one groove corresponding to the at least one boss exists in one or more second connecting portions 41, and each boss can extend into a corresponding groove.

[0109] Among them, the height of the boss along the thickness direction of the back plate 1 can be within a height threshold range, and this height threshold range can be a threshold range that can ensure that the boss has sufficient strength when supporting the back plate 1, and at the same time, the boss is not easily detached from the groove.

[0110] Exemplarily, this height threshold range can be between 0.5 times and 1.5 times the thickness of the back plate 1. Of course, the depth of the boss can be adjusted slightly according to the actual situation, as long as sufficient strength can be ensured. The embodiments of the present application do not limit this.

[0111] Among them, the boss can be fixed on the back plate 1 through a fixing member. Exemplarily, the fixing member can be a countersunk screw. Of course, the boss can also be integrally formed with the back plate 1, which can ensure that the boss has stronger stability and at the same time can reduce the assembly steps.

[0112] Among them, the groove and the corresponding boss can be inclinedly arranged in the depth direction and the height direction respectively. That is, the bottom end of the groove can be lower than the opening end of the groove, and correspondingly, the top end of the boss can be lower than the bottom end of the boss. In this way, the groove can exert a supporting force perpendicular to the contact surface on the boss, and there is a component force of this supporting force pointing to the second connecting portion 41. This component force can further enhance the fitting effect between the back plate 1 and the mounting surface 4, and further enable the back plate 1 to be more firmly fixed on the mounting surface 4.

[0113] It should be noted that one or more grooves or one or more bosses can be provided on the back plate 1. Of course, it can also be set as a combined arrangement of one or more grooves and one or more bosses, as long as the fixation of the back plate 1 can be achieved. The embodiments of the present application do not limit this.

[0114] In the above two embodiments, the height of each boss along the thickness direction of the back plate 1 can be slightly less than the depth of the corresponding groove along the thickness direction of the back plate 1. In this way, after each boss extends into the corresponding groove, the boss can be completely hidden in the groove, so as to ensure that the back plate 1 can fit on the mounting surface 4. In addition, the width of each boss corresponding to each groove can be slightly less than the width of the corresponding groove, which is convenient for installation.

[0115] Furthermore, the width of each groove along the horizontal direction can be within a certain width threshold range, and this width threshold range can be a threshold range that can ensure relatively high strength in the vertical direction when the boss and the groove fix the back plate 1. Exemplarily, this threshold range can be between 1 time and 2 times the depth of the groove. Of course, the widths of each boss and each groove can be adjusted according to the actual situation, as long as relatively high strength can be ensured when supporting the back plate 1. The embodiments of the present application do not limit this.

[0116] In some embodiments, each groove may be a columnar structure.

[0117] Among them, at least one groove may be located on the same straight line, and the straight line where at least one groove is located is parallel to the horizontal plane. Of course, at least one groove may also be distributed in the vertical direction, or be arrayed into a groove matrix of multiple rows and multiple columns.

[0118] Among them, when the number of at least one groove is multiple, the multiple grooves can disperse the stress on the backplane 1, and the more the number of grooves, the better the stress dispersion effect.

[0119] It should be noted that arc chamfers may be provided at the corners of the bottom surface and side walls of each columnar groove. In this way, the arc chamfers can disperse the stress at the corners in a small range, thereby avoiding the phenomenon of local stress concentration at the corners.

[0120] In some other embodiments, each groove may be a strip structure.

[0121] Among them, the strip-shaped first connecting portion 15 can increase the contact area between the backplane 1 and the mounting surface 4, and then evenly disperse the stress on the backplane 1. In this way, the phenomenon of stress concentration can be avoided.

[0122] Among them, in order to make the stress dispersion effect more significant, the length of the strip-shaped groove may be greater than or equal to 0.5 times the length of the backplane 1 in the horizontal direction. Of course, the length of the strip-shaped groove can also be adjusted according to the actual situation, as long as the effect of stress dispersion can be achieved. The embodiments of the present application do not limit this. Correspondingly, for the convenience of installation, the length of each boss may be slightly less than the length of the corresponding groove.

[0123] In addition, the length of the strip-shaped groove may also be less than 0.5 times the length of the backplane 1 in the horizontal direction. In this way, at least one groove may be located on the same straight line, and the length direction of each groove is parallel to the horizontal plane, so that the stress can be evenly dispersed in the horizontal plane direction of the backplane 1 as well.

[0124] In some embodiments, at least one groove may also be distributed in the height direction of the backplane 1, and the length direction of each groove is parallel to the horizontal plane. In this way, the stress can be evenly dispersed in both the horizontal plane direction and the height direction of the backplane 1. Of course, multiple grooves may be distributed in the horizontal plane direction while being distributed in the height direction of the backplane 1, that is, multiple grooves may be arrayed into a groove matrix of multiple rows and multiple columns.

[0125] Among them, the cross-sectional shape of each groove can be rectangular. Of course, the cross-sectional shape of each groove can also be L-shaped. When the cross-sectional shape of each groove is rectangular, the cross-sectional shape of the boss on the mounting surface 4 corresponding to the groove can also be rectangular. In this way, the structures of the groove and the boss are relatively simple, facilitating processing and installation. When the cross-sectional shape of each groove is L-shaped, the cross-sectional shape of the boss on the mounting surface 4 corresponding to the groove can also be L-shaped. For the convenience of installation, the vertical height of the open end of the groove can be greater than or equal to the overall height of the boss. In this way, the second connecting portion 41 can apply a vertically upward and horizontally inwardly directed supporting force to the first connecting portion 15 simultaneously. Thus, with the cooperation of the second connecting portion 41 and the first connecting portion 15, the back plate 1 can be supported more stably.

[0126] It should be noted that when the strip-shaped groove is fixed to the corresponding boss, the cross-sectional shapes of the strip-shaped groove and the boss can also be adjusted to increase the contact area between the boss and the back plate 1 in the plane where the back plate 1 is located, so that the phenomenon of force dispersion can be achieved through the boss.

[0127] It should also be noted that arc chamfers can be provided at the corners of each adjacent side wall of each strip-shaped groove and at the corners of each adjacent side wall of the corresponding boss. In this way, the arc chamfers can disperse the stress at the corners within a small range, thereby avoiding the phenomenon of local stress concentration at the corners.

[0128] In some other embodiments, each groove can be a ring structure.

[0129] Among them, the ring structure can be a circular ring structure. Of course, it can also be a square ring structure or a ring structure of other shapes.

[0130] When the groove is a circular ring structure, if the diameter of the groove is large, the number of grooves can be one, that is, a relatively large circular ring groove can be provided on the back plate 1.

[0131] Exemplarily, the diameter of the circular ring of the relatively large circular ring groove can be 0.75 times the length of the back plate 1 in the horizontal direction. In this way, a large range of stress dispersion can be achieved. Of course, the diameter of the circular ring of the circular ring groove can be adjusted according to the actual situation as long as stress dispersion can be achieved. The embodiments of the present application do not limit this.

[0132] If the diameter of the groove is small, the number of grooves can be multiple. At this time, the multiple grooves are arranged on the back plate 1 in an array, so that uniform stress dispersion on the back plate 1 can be achieved. In addition, the multiple grooves can also be arranged in a form of multiple concentric circles as long as uniform stress dispersion on the back plate 1 can be achieved. The embodiments of the present application do not limit this.

[0133] It should be noted that arc chamfers can be provided at the corners of each adjacent side wall of each annular groove and at the corners of each adjacent side wall of a corresponding boss. In this way, the arc chamfers can disperse the stress at the corners within a small range, thereby avoiding the phenomenon of local stress concentration at the corners.

[0134] Of course, in addition to being arranged in columnar, strip, and annular structures, at least one groove can also be arranged in other shapes, as long as the purpose of supporting the backplane 1 and stress dispersion can be achieved. The embodiments of the present application do not limit this.

[0135] It should be noted that when at least one of the one or more first connecting portions 15 is a boss, the shape of the boss can be similar to the structure and shape of the groove described above. Of course, the boss can also be arranged in other shapes. The embodiments of the present application do not limit this.

[0136] In the embodiments of the present application, the surface of the optical film away from the backplane protrudes from the frame, the surface of the backplane away from the optical film protrudes from the frame, or is flush with the frame. That is, the thickness of the frame is less than the sum of the thicknesses of the optical film and the backplane, and the frame does not protrude from the surfaces of the optical film and the backplane. In other words, the thickness of the display screen is determined by the thicknesses of the optical film and the backplane. Therefore, the thinness and lightness of the display screen can be achieved by separately reducing the thicknesses of the optical film and the backplane. In addition, by setting the border to a hollow structure, the strength of the frame is increased, and thus the strength of the display screen is increased. Moreover, under the action of the insert, the situation where fine dust seriously affects the display effect of the display screen can be avoided.

[0137] Figure 15 It is a partial enlarged view of a display screen provided by the embodiments of the present application. Refer to Figure 15 , the display screen may include: a backplane 1, an optical film 2, and a frame 3. The frame 3 wraps the edge of the backplane 1, and the optical film 2 is fixed on the backplane 1. The surface of the backplane 1 close to the optical film 2 protrudes from the frame 3, or is flush with the frame 3. The surface of the backplane 1 away from the optical film 2 protrudes from the frame 3, or is flush with the frame 3.

[0138] In the embodiments of the present application, the surface of the optical film 2 away from the backplane 1 protrudes from the frame 3, the surface of the backplane 1 away from the optical film 2 protrudes from the frame 3, or is flush with the frame 3. That is, the thickness of the frame 3 is less than the sum of the thicknesses of the optical film 2 and the backplane 1, and the frame 3 does not protrude from the surfaces of the optical film 2 and the backplane 1. In other words, the thickness of the display screen is determined by the thicknesses of the optical film 2 and the backplane 1. Therefore, the thinness and lightness of the display screen can be achieved by separately reducing the thicknesses of the optical film 2 and the backplane 1.

[0139] In some embodiments, the inner wall of the frame 3 has a stepped structure in the thickness direction, and the edge of the back plate 1 has a stepped structure in the thickness direction. The stepped surface of the back plate 1 is fixedly connected to the stepped surface of the frame 3.

[0140] When the inner wall of the frame 3 has a stepped structure in the thickness direction, in one possible implementation, referring to Figure 16 , the stepped surface of the frame 3 faces the direction of the optical film 2. Correspondingly, the stepped surface of the back plate 1 can face away from the optical film 2. Then, the stepped surface of the back plate 1 and the stepped surface of the frame 3 can be fixedly connected.

[0141] When the inner wall of the frame 3 has a stepped structure in the thickness direction, in another possible implementation, referring to Figure 17 , the stepped surface of the frame 3 faces away from the optical film 2. Correspondingly, the stepped surface of the back plate 1 can face the direction of the optical film 2. Then, the stepped surface of the back plate 1 and the stepped surface of the frame 3 can be fixedly connected.

[0142] In other embodiments, referring to Figure 18 , the cross-section of the frame 30 of the frame 3 can be U-shaped. When the cross-section of the frame 30 is U-shaped, in one possible implementation, both sides of the edge of the back plate 1 are stepped, and the frame 30 is fixed to the edge of the back plate 1. That is, a first step 13 is provided in the thickness direction on the surface of the back plate 1 close to the optical film 2, and a first step 14 is provided in the thickness direction on the surface of the back plate 1 away from the optical film 2. The frame 30 is fixed to the edge of the back plate 1 through the stepped surface of the first step 13 and the stepped surface of the first step 14. In other words, the frame 30 with a U-shaped cross-section can be first buckled on the stepped surface of the first step 13 and the stepped surface of the first step 14, thereby realizing the fixation of the frame 30 to the edge of the back plate 1 through the stepped surface of the first step 13 and the stepped surface of the first step 14.

[0143] It should be noted that the frame 30 can be respectively fixed to the stepped surfaces of the first step 13 and the first step 14 through double-sided tape, thereby realizing the fixation of the frame 30 to the edge of the back plate 1. Of course, the frame 30 can also be fixed to the stepped surfaces of the first step 13 and the first step 14 in other ways, and the embodiments of the present application do not make specific limitations in this regard.

[0144] The fixing method among the back plate 1, the optical film 2 and the frame 3 involved in the embodiments of the present application, as well as the structure of the frame 3, can be as described in the above embodiments, and the embodiments of the present application will not be elaborated herein.

[0145] In the embodiment of the present application, the surface of the optical film 2 away from the backplane 1 protrudes from the frame 3, the surface of the backplane 1 away from the optical film 2 protrudes from the frame 3, or is flush with the frame 3. That is to say, the thickness of the frame 3 is less than the sum of the thicknesses of the optical film 2 and the backplane 1 and the frame 3 does not protrude from the surfaces of the optical film 2 and the backplane 1. In other words, the thickness of the display screen is determined by the thicknesses of the optical film 2 and the backplane 1. Therefore, by separately reducing the thicknesses of the optical film 2 and the backplane 1, the thinness and lightness of the display screen can be achieved.

[0146] Figure 19 FIG. is a schematic structural diagram of a projection device provided by an embodiment of the present application. Refer to Figure 19 , the projection device includes a projection host 1000 and the display screen 2000 provided in the above embodiment. The projection host 1000 is located on the side of the display screen 2000 close to the optical film, and the light exit port of the projection host 1000 faces the display screen 2000. The projection host 1000 is configured to emit a light beam to the display screen 2000, and the display screen 2000 is configured to receive the light beam emitted by the projection host 1000 and perform screen display.

[0147] Among them, the display screen 2000 involved in the embodiment of the present application may be as described in the above first embodiment or second embodiment, and details are not described herein again in the embodiment of the present application.

[0148] In the embodiment of the present application, the surface of the optical film of the display screen away from the backplane protrudes from the frame, the surface of the backplane away from the optical film protrudes from the frame, or is flush with the frame. That is to say, the thickness of the frame is less than the sum of the thicknesses of the optical film and the backplane and the frame does not protrude from the surfaces of the optical film and the backplane. In other words, the thickness of the display screen is determined by the thicknesses of the optical film and the backplane. Therefore, by separately reducing the thicknesses of the optical film and the backplane, the thinness and lightness of the display screen can be achieved, and further the projection device is made more portable and beautiful.

[0149] The above are only optional embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A display screen, characterized in that, The display screen includes: a backplane, an optical film sheet, and a frame; The frame wraps the edge of the backplane, and the optical film sheet is fixed on the backplane; The surface of the backplane close to the optical film sheet protrudes from the frame or is flush with the frame; the surface of the backplane away from the optical film sheet protrudes from the frame or is flush with the frame; The first projection covers the second projection. The first projection refers to the projection of the backplane and the frame in the thickness direction of the backplane, and the second projection refers to the projection of the optical film sheet in the thickness direction of the backplane.

2. The display screen according to claim 1, wherein The inner wall of the frame is in a stepped structure along the thickness direction, and the edge of the backplane is in a stepped structure along the thickness direction. The stepped surface of the backplane is fixedly connected to the stepped surface of the frame.

3. The display screen according to claim 2, characterized in that, The stepped structure in the frame forms two inner ring surfaces, and the stepped structure in the backplane forms two outer ring surfaces; The first inner ring surface is fixedly connected to the first outer ring surface. The first inner ring surface refers to one of the two inner ring surfaces that is away from the outer wall of the frame, and the first outer ring surface refers to one of the two outer ring surfaces that is close to the center of the backplane; The second inner ring surface is fixedly connected to the second outer ring surface. The second inner ring surface refers to one of the two inner ring surfaces that is close to the outer wall of the frame, and the second outer ring surface refers to one of the two outer ring surfaces that is away from the center of the backplane.

4. The display screen according to any one of claims 1-3, characterized in that The frame includes two relatively arranged surfaces. The first surface of the two surfaces is in a conical structure. The first surface refers to the surface on the same side as the surface of the optical film sheet away from the backplane.

5. The display screen according to any one of claims 1 to 3, characterized in that The frame border is a hollow structure.

6. The display screen according to claim 5, characterized in that, The cross-section of the inner cavity of the border is circular or rectangular.

7. The display screen according to claim 3, wherein A first groove ring is provided on the stepped surface of the frame, and a boss ring matching the first groove ring is provided on the stepped surface of the backplane. The boss ring is clamped in the first groove ring.

8. The display screen according to claim 3 or 7, characterized in that, The first inner ring surface is provided with a first serrated structure along the thickness direction, and the first outer ring surface of the backplane is provided with a second serrated structure along the thickness direction. The first serrated structure and the second serrated structure match each other.

9. A projection device, characterized in that, The projection device includes a projection host and the display screen according to any one of claims 1-8 above; The projection host is located on the side of the display screen close to the optical film sheet, and the light outlet of the projection host faces the display screen; The projection host is used to emit a light beam to the display screen, and the display screen is used to receive the light beam emitted by the projection host for picture display.

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