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 functional layer for reflecting the light beam emitted by the projection host to display an image; an adhesive layer adhered to the functional layer; a support layer adhered to the side of the adhesive layer away from the functional layer, and the support layer is used to support the functional layer; the total thickness of the functional layer, the adhesive layer and the support layer is less than or equal to 5 millimeters, and the ratio of the shear modulus to the weight of the support layer is greater than or equal to the support threshold. Through the support of the support layer for the functional layer, the flatness of the functional layer is ensured, and the display effect of the image is improved. In addition, since the total thickness of the functional layer, the adhesive layer and the support layer is less than or equal to 5 millimeters, and the ratio of the shear modulus to the weight of the support layer is greater than or equal to the support threshold, the ultra-thinness of the display screen is ensured, and the situation that the functional layer is deformed due to the deformation of the support layer under external environmental factors is avoided.

Description

Technical Field

[0001] This application relates to the technical field of screen display, and particularly 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 a thinner trend. Since a display screen mainly includes a backplane and optical film sheets adhered to the backplane, currently, the thinning of the display screen is usually achieved by reducing the thickness of the backplane.

[0003] In related technologies, an aluminum honeycomb core board is usually used as the backplane. Since the aluminum honeycomb core board includes two layers of splints and a honeycomb board disposed between the two layers of splints, the thickness of the aluminum honeycomb core board is usually reduced by reducing the thickness of the honeycomb board. However, when the thickness of the honeycomb board is reduced, the reduction amount of the shear modulus of the aluminum honeycomb core board is much larger than the reduction amount of the weight, so that the ratio of the shear modulus to the weight of the aluminum honeycomb core board after the thickness reduction is also relatively reduced, reducing the anti-deformation performance of the aluminum honeycomb core board. In this way, under the influence of external humidity or high temperature, the aluminum honeycomb core board is easily deformed, thus affecting the flatness of the optical film sheet and reducing the display effect of the display screen. Summary of the Invention

[0004] This application provides a display screen and a projection device, which can solve the problem of poor display effect when the display screen tends to be ultra-thin. The technical solutions are as follows:

[0005] On the one hand, a display screen is provided, and the display screen includes:

[0006] A functional layer for reflecting the light beam emitted by the projection host to display an image;

[0007] An adhesive layer adhered to the functional layer;

[0008] A support layer adhered to the side of the adhesive layer away from the functional layer, and the support layer is used to support the functional layer;

[0009] The total thickness of the functional layer, the adhesive layer, and the support layer is less than or equal to 5 millimeters, and the ratio of the shear modulus to the weight of the support layer is greater than or equal to a support threshold, where the support threshold refers to the minimum ratio of the shear modulus to the weight when the support layer does not deform.

[0010] Optionally, the support threshold is 4, 4.2, or 4.4.

[0011] Optionally, the material of the support layer is a fiberglass board, a PMMA (Polymethyl Methacrylate) board, a PET (Polyethylene Terephthalate) board, or a carbon fiber composite board.

[0012] Optionally, the thickness of the support layer ranges from 0.1 mm to 2 mm.

[0013] Optionally, the functional layer is an optical film, and the optical gain of the functional layer ranges from 0.3 to 1.3.

[0014] Optionally, the thickness of the functional layer ranges from 0.1 mm to 1.6 mm.

[0015] Optionally, the optical film is a Fresnel optical film or a white fiberglass curtain.

[0016] Optionally, the adhesive layer is a film adhesive or double-sided tape, and the thickness of the adhesive layer ranges from 0.05 mm to 0.3 mm.

[0017] Optionally, the peel strength of the adhesive layer is greater than or equal to 1 N / cm.

[0018] Optionally, the display screen further includes a surrounding portion that wraps the support layer, or wraps the support layer, the adhesive layer, and the functional layer.

[0019] On the other hand, a projection device is provided, which includes a projection host and the display screen described in the above aspects;

[0020] The projection host is located on one side of the display screen close to the functional layer, and the light exit port of the projection host faces the display screen;

[0021] 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.

[0022] The beneficial effects of the technical solution provided by this application can at least include:

[0023] Through the support of the support layer for the functional layer, the flatness of the functional layer is ensured, and the display effect of the screen is improved. In addition, since the total thickness of the functional layer, the adhesive layer, and the support layer is less than or equal to 5 mm, and the ratio of the shear modulus to the weight of the support layer is greater than or equal to the support threshold, while ensuring the ultra-thinness of the display screen, the situation where the functional layer is deformed due to the deformation of the support layer in the external environment is avoided, thereby ensuring the screen display effect of the display screen. Description of the Drawings

[0024] 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 drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 is a schematic structural diagram of a display screen provided by an embodiment of the present application;

[0026] Figure 2 is an exploded view of a display screen provided by an embodiment of the present application;

[0027] Figure 3 is a schematic installation structure diagram of a display screen provided by an embodiment of the present application;

[0028] Figure 4 is a partial enlarged view of a display screen provided by an embodiment of the present application;

[0029] Figure 5 is another partial enlarged view of a display screen provided by an embodiment of the present application;

[0030] Figure 6 is another partial enlarged view of a display screen provided by an embodiment of the present application;

[0031] Figure 7 is another partial enlarged view of a display screen provided by an embodiment of the present application;

[0032] Figure 8 is yet another partial enlarged view of a display screen provided by an embodiment of the present application;

[0033] Figure 9 is a schematic structural diagram of a projection device provided by an embodiment of the present application.

[0034] Reference numerals:

[0035] 1: functional layer; 2: bonding layer; 3: support layer; 4: installation surface; 5: surrounding part;

[0036] 31: first connection part; 41: second connection part;

[0037] 51: frame; 511: insertion part;

[0038] 10: projection device; 20: projection host. Detailed implementation manners

[0039] To make the objectives, technical solutions, and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the drawings.

[0040] In the related art, for a backplate display screen, in order to achieve ultra-thinness, it is mainly achieved by reducing the thickness of the backplate. In the actual process, an aluminum honeycomb core plate is usually used as the backplate. The aluminum honeycomb core plate includes two layers of splints and a honeycomb plate disposed between the two layers of splints. Usually, the thickness of the aluminum honeycomb core plate is reduced by reducing the thickness of the honeycomb plate.

[0041] For example, assuming that the support threshold is 4, taking an 80-inch display screen as an example, the thickness of the aluminum honeycomb core plate can be 10 mm, the weight of the aluminum honeycomb core plate is 16 kg, and the shear modulus is 70 GPa. In this way, the ratio of the shear modulus to the weight of the aluminum honeycomb core plate is 4.375, which is greater than the support threshold, so as to ensure that the aluminum honeycomb core plate will not drive the optical film to deform synchronously due to environmental factors. In order to achieve the ultra-thinness of the display screen, the thickness of the honeycomb plate included in the aluminum honeycomb core plate can be halved. In this way, the shear modulus of the aluminum honeycomb core plate after halving is reduced to 35 GPa, and the weight is reduced to 14 kg. At this time, the ratio of the shear modulus to the mass is reduced to 2.5, which is much less than 4. In this way, the aluminum honeycomb core plate with halved thickness is easily deformed due to environmental factors, and then drives the optical film to deform, reducing the display effect of the display screen.

[0042] Figure 1 Schematically shows a structural diagram of a display screen according to an embodiment of the present application. Figure 2 Schematically shows an exploded view of a display screen according to an embodiment of the present application. As Figure 1 or Figure 2 shown, the display screen includes: a functional layer 1, an adhesive layer 2, and a support layer 3. The functional layer 1 is used to reflect the light beam emitted by the projection host to display a picture; the adhesive layer 2 is bonded to the functional layer 1; the support layer 3 is bonded to the side of the adhesive layer 2 away from the functional layer 1, and the support layer 3 is used to support the functional layer 1; the total thickness of the functional layer 1, the adhesive layer 2, and the support layer 3 is less than or equal to 5 mm, and the ratio of the shear modulus to the weight of the support layer 3 is greater than or equal to the support threshold. The support threshold refers to the minimum ratio of the shear modulus to the weight when the support layer 3 does not deform.

[0043] In the embodiment of the present application, by the support of the support layer 3 for the functional layer 1, the flatness of the functional layer 1 is ensured, and the display effect of the picture is improved. In addition, since the total thickness of the functional layer 1, the adhesive layer 2, and the support layer 3 is less than or equal to 5 mm, and the ratio of the shear modulus to the weight of the support layer 3 is greater than or equal to the support threshold, while ensuring the ultra-thinness of the display screen, the situation that the functional layer 1 is deformed due to the deformation of the support layer 3 under the external environment is avoided, thus ensuring the picture display effect of the display screen.

[0044] Among them, the support threshold can be determined according to the environmental limit value of the current environment. Exemplarily, it can be determined according to the highest temperature, the lowest temperature, the maximum humidity, etc. of the current environment. Exemplarily, the support threshold can be 4, 4.2 or 4.4. Of course, the support threshold can also be 3.6 or 3.8, etc. The embodiments of the present application do not limit this.

[0045] Exemplarily, the total thickness of the functional layer 1, the adhesive layer 2 and the support layer 3 can also be 3.9 mm or 4.2 mm. Of course, it can also be other values, as long as it is less than or equal to 5 mm.

[0046] It should be noted that when the functional layer 1 is adhered to the support layer 3 through the adhesive layer 2, the surface of the support layer 3 in contact with the adhesive layer 2 can be designed to be a rough surface, that is, the surface of the support layer 3 for fixing with the adhesive layer 2 has a certain roughness, so as to increase the contact area between the support layer 3 and the adhesive layer 2, so as to ensure the stability of the adhesion between the functional layer 1 and the support layer 3.

[0047] It should also be noted that when the functional layer 1, the adhesive layer 2 and the support layer 3 are fixed, in order to avoid the display screen being too thick after fixing, the projections of the functional layer 1 and the adhesive layer 2 in the thickness direction are both located on the support layer 3, that is, the areas of the functional layer 1 and the adhesive layer 2 are both less than or equal to the area of the support layer 3.

[0048] In order to facilitate the adhesion and fixation of the functional layer 1 and ensure the flatness of the functional layer 1, the area of the functional layer 1 before fixation can be larger than the area of the support layer 3, that is, after the functional layer 1 is fixed on the support layer 3, the edge of the functional layer 1 can extend beyond the edge of the support layer 3. In this way, when fixing the functional layer 1, it is convenient to apply a force along the edge of the functional layer 1 to ensure the flatness of the functional layer 1. After the functional layer 1 is fixed on the support layer 3 through the adhesive layer 2, the extended part of the edge of the functional layer 1 can be trimmed. Of course, the extended part of the edge of the functional layer 1 can be bent to the side of the support layer 3 away from the adhesive layer and fixed on the side of the support layer 3 away from the adhesive layer.

[0049] Among them, the part of the functional layer 1 bent to the side of the support layer 3 away from the adhesive layer can be fixed by adhesion. Of course, it can also be fixed by other methods, as long as the total thickness of the functional layer 1, the adhesive layer 2 and the support layer 3 is less than or equal to 5 mm. The embodiments of the present application do not limit this.

[0050] In some embodiments, in order to ensure that the ratio of the shear modulus to the weight of the support layer 3 is greater than or equal to the support threshold, the material of the support layer 3 can be a glass fiber board, a PMMA board, a PET board or a carbon fiber composite board, etc. That is, the support layer 3 can be made of a glass fiber board, a PMMA board, a PET board or a carbon fiber composite board, etc.

[0051] Of course, other materials can also be used to make the support layer 3, as long as the ratio between the shear modulus and the weight of the support layer 3 is greater than or equal to the support threshold. The embodiments of the present application do not limit this. For example, the support layer 3 can also be made of a PC (Polycarbonate) plate.

[0052] Among them, the thickness of the support layer 3 can be in the range of 0.1 mm to 2 mm. Exemplarily, the thickness of the support layer 3 can be 0.8 mm, 1.5 mm, or 1.9 mm. Of course, the thickness of the support layer 3 can also be other values, as long as the total thickness of the functional layer 1, the adhesive layer 2, and the support layer 3 is less than or equal to 5 mm.

[0053] It should be noted that when the thickness of the support layer 3 is relatively thin, in order to ensure that the ratio between the shear modulus and the weight is greater than the support threshold, a reinforcing agent can also be added to the manufacturing material of the support layer 3. That is, the support layer 3 can be made of a glass fiber board, a PMMA board, a PET board, a carbon fiber composite board, etc. and a reinforcing agent.

[0054] In some embodiments, the functional layer 1 can be an optical film, and the optical gain of the functional layer 1 can be in the range of 0.3 to 1.3. That is, the optical gain of the optical film can be in the range of 0.3 to 1.3 to ensure the effect of the picture displayed by the optical film.

[0055] Of course, the functional layer 1 can also be other optical devices capable of realizing picture display, and the optical gain can also be other values, as long as when the projection beam is projected on the functional layer 1, the functional layer 1 can display the picture better. The embodiments of the present application do not limit this.

[0056] Among them, the thickness of the functional layer 1 can be in the range of 0.1 mm to 1.6 mm. Exemplarily, the thickness of the functional layer 1 can be 0.8 mm or 1.2 mm, etc. Of course, the thickness of the support layer 3 can also be other values, as long as the total thickness of the functional layer 1, the adhesive layer 2, and the support layer 3 is less than or equal to 5 mm.

[0057] Among them, the optical film can be a Fresnel optical film or a white glass fiber screen. The Fresnel optical film can be a linear Fresnel optical film or a circular Fresnel optical film. Of course, in addition to being a Fresnel optical film or a white glass fiber screen, the optical film can also be a white plastic screen, etc., as long as it can realize the display of the picture.

[0058] In some embodiments, the adhesive layer 2 may be a film adhesive or double-sided adhesive. That is, the functional layer 1 and the support layer 3 can be fixed by adhesion. Of course, in addition to being a film adhesive or double-sided adhesive, the adhesive layer 2 can also be a foam adhesive, etc., as long as it can achieve the adhesive fixation of the functional layer 1 and the support layer 3. The embodiments of the present application do not limit this.

[0059] Among them, the thickness of the adhesive layer can be in the range of 0.05 mm to 0.3 mm. For example, the thickness of the adhesive layer 2 can be 0.1 mm, 0.15 mm or 0.2 mm, etc. Of course, the thickness of the adhesive layer 2 can also be other values, as long as it can ensure that the total thickness of the functional layer 1, the adhesive layer 2 and the support layer 3 is less than or equal to 5 mm. The embodiments of the present application do not limit this.

[0060] Among them, the peel strength of the adhesive layer is greater than or equal to 1 N / cm. In this way, the peel strength of the adhesive layer 2 can be used to prevent the functional layer 1 from separating from the support layer 3. The peel strength refers to the maximum force required for unit-width peeling of the contact surface when the functional layer 1 is peeled from the support layer 3.

[0061] It should be noted that the adhesive layer 2 can be a glue with a certain elasticity. For example, the adhesive layer 2 can be a foam adhesive. In this way, in addition to being able to fix the functional layer 1 and the support layer 3, the adhesive layer 2 can also buffer the local deformation of the support layer 3 through its own elasticity, so as to prevent the local deformation of the functional layer 1 from being directly affected after the support layer 3 is deformed. In addition, due to the certain elasticity of the adhesive layer 2, after the local force applied to the support layer 3 or the functional layer 1 disappears, the adhesive layer 2 can cause the support layer 3 or the functional layer 1 to return to its original state under its own elastic action, thus ensuring that the bonding state between the support layer 3 and the functional layer 1 is not affected, and thus ensuring the flatness of the functional layer 1, and thus ensuring the display effect of the display screen.

[0062] It should also be noted that in addition to being fixed by gluing between the functional layer 1 and the support layer 3, they can also be fixed by other means. The embodiments of the present application do not limit this. For example, the edge of the functional layer 1 can be pressed against the support layer 3 by a pressing strip to achieve fixation.

[0063] In some embodiments, as Figure 3 shown, one or more first connection parts 31 are provided on the side of the support layer 3 away from the optical film. The support layer 3 is used to be fixedly connected to one or more corresponding second connection parts 41 provided on the mounting surface 4 in an embedded manner through one or more first connection parts 31. And after each first connection part 31 is fixedly connected to the corresponding second connection part 41, the distance between the side of the support layer 3 away from the optical film and the mounting surface 4 is less than 1 mm.

[0064] Among them, the installation surface 4 can be a plane composed of a fixing bracket or the wall surface of a wall, etc., as long as it can achieve the fixation of the support layer 3.

[0065] It should be noted that, in order to achieve the stability of the connection between the installation surface 4 and the support layer 3, each first connection portion 31 can be seamlessly bonded to a corresponding second connection portion 41.

[0066] Among them, each first connection portion 31 and a corresponding second connection portion 41 can be bonded together by an adhesive. Exemplarily, the first connection portion 31 and a corresponding second connection portion 41 can be bonded by double-sided tape. Of course, an adhesive with buffering and vibration absorption capabilities can also be selected for bonding, so as to avoid the display screen 1 vibrating and generating noise. Exemplarily, the first connection portion 31 and a corresponding second connection portion 41 can be bonded by foam adhesive.

[0067] Of course, in addition to being fixed by bonding, each first connection portion 31 and a corresponding second connection portion 41 can also be fixedly connected by magnetic attraction, so as to facilitate the separation of the support layer 3 from the installation surface 4.

[0068] In some embodiments, there is at least one groove in one or more first connection portions 31. Correspondingly, there is at least one boss on one or more second connection portions 41 that corresponds one-to-one with at least one groove, and each boss can extend into a corresponding groove.

[0069] Among them, the depth of each groove can be between 0.5 times and 0.75 times the thickness of the support layer 3. 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 support layer 3. 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 support layer 3 is appropriate. The embodiments of the present application do not limit this.

[0070] Among them, the boss can be pre-fixed on the installation 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 installation surface 4, which can ensure that the boss has stronger stability and can also reduce the assembly steps.

[0071] 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 connection portion 41, and this component force can further enhance the fitting effect between the display screen 1 and the installation surface 4, and further can fix the display screen 1 more firmly on the installation surface 4.

[0072] In some other embodiments, at least one boss exists in one or more first connecting portions 31. 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.

[0073] Wherein, the height of the boss in the thickness direction of the support layer 3 can be within a height threshold range, and this height threshold range can be a threshold range to ensure that the boss has sufficient strength when supporting the display screen 1, and at the same time, the boss is not easily disengaged from the groove.

[0074] Exemplarily, this height threshold range can be between 0.5 times and 1.5 times the thickness of the support layer 3. Of course, the depth of the boss can be slightly adjusted according to the actual situation as long as sufficient strength can be ensured. The embodiments of the present application do not limit this.

[0075] Wherein, the boss can be fixed on the support layer 3 through a fixing member. Exemplarily, the fixing member can be a countersunk screw. Of course, the boss can also be integrally formed with the support layer 3, which can ensure that the boss has stronger stability and at the same time can reduce the assembly steps.

[0076] Wherein, 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 apply a supporting force perpendicular to the contact surface to the boss, and there is a component force of this supporting force pointing to the second connecting portion 41, and this component force can further enhance the fitting effect between the display screen 1 and the mounting surface 4, and thus the display screen 1 can be more firmly fixed on the mounting surface 4.

[0077] It should be noted that one or more grooves or one or more bosses can be provided on the support layer 3. 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 fixing of the support layer 3 can be realized. The embodiments of the present application do not limit this.

[0078] In the above two embodiments, the height of each boss in the thickness direction of the support layer 3 can be slightly smaller than the depth of a corresponding groove in the thickness direction of the support layer 3. In this way, after each boss extends into a corresponding groove, the boss can be completely hidden in the groove, so as to ensure that the support layer 3 can fit on the mounting surface 4. In addition, the width of each boss corresponding to each groove can be slightly smaller than the width of the corresponding groove, which is convenient for installation.

[0079] Further, the width of each groove in the horizontal direction can be within a certain width threshold range, and this width threshold range can be the threshold range that can ensure a relatively high strength in the vertical direction when the boss and the groove fix the display screen 1. Exemplarily, the 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 actual situations, as long as they can ensure a relatively high strength when supporting the display screen 1, and the embodiments of the present application do not limit this.

[0080] In some embodiments, each groove can be a columnar structure.

[0081] Among them, at least one groove can be 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 can also be distributed in the vertical direction, or be arrayed into a groove square matrix with multiple rows and multiple columns.

[0082] Among them, when the number of at least one groove is multiple, the multiple grooves can disperse the stress on the display screen 1, and the more the number of grooves, the better the stress dispersion effect.

[0083] It should be noted that arc chamfers can be provided at the corners of the bottom surface and the side wall 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.

[0084] In some other embodiments, each groove can be a strip structure.

[0085] Among them, the strip-shaped first connecting portion 31 can increase the contact area between the support layer 3 and the installation surface 4, and then evenly disperse the stress on the support layer 3. In this way, the phenomenon of stress concentration can be avoided.

[0086] Among them, in order to make the stress dispersion effect more significant, the length of the strip-shaped groove can be greater than or equal to 0.5 times the length of the support layer 3 in the horizontal direction. Of course, the length of the strip-shaped groove can also be adjusted according to actual situations, as long as the stress dispersion effect can be achieved, and the embodiments of the present application do not limit this. Correspondingly, for the convenience of installation, the length of each boss can be slightly less than the length of the corresponding groove.

[0087] In addition, the length of the strip-shaped groove can also be less than 0.5 times the length of the support layer 3 in the horizontal direction. In this way, at least one groove can be 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 support layer 3 as well.

[0088] In some embodiments, at least one groove may also be distributed along the height direction of the support layer 3, and the length direction of each groove is parallel to the horizontal plane. In this way, stress can be evenly dispersed in both the horizontal plane direction and the height direction of the support layer 3. Of course, multiple grooves can be distributed along the height direction of the support layer 3 while being distributed in the horizontal plane direction, that is, multiple grooves can be arranged in a matrix of multiple rows and multiple columns of groove arrays.

[0089] 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 inward support force to the first connecting portion 31 at the same time. Thus, with the cooperation of the second connecting portion 41 and the first connecting portion 31, the display screen 1 can be supported more stably.

[0090] 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 support layer 3 in the plane of the support layer 3, so that the phenomenon of force dispersion can be achieved through the boss.

[0091] 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 in a small range, thereby avoiding the phenomenon of local stress concentration at the corners.

[0092] In still other embodiments, each groove can be a ring structure.

[0093] 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.

[0094] 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 support layer 3.

[0095] Exemplarily, the diameter of the ring of the larger circular groove can be 0.75 times the length of the support layer 3 in the horizontal direction. In this way, a large range of stress dispersion can be achieved. Of course, the diameter of the ring of the circular 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 make any limitation in this regard.

[0096] When the diameter of the groove is small, the number of grooves can be multiple. At this time, the multiple grooves are arranged on the support layer 3 in an array manner. In this way, uniform dispersion of the stress on the support layer 3 can be achieved. In addition, the multiple grooves can also be arranged in a form of multiple concentric circles as long as uniform dispersion of the stress on the support layer 3 can be achieved. The embodiments of the present application do not make any limitation in this regard.

[0097] 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 in a small range, thereby avoiding the phenomenon of local stress concentration at the corners.

[0098] Of course, in addition to being arranged in columnar, strip-shaped, and annular structures, at least one groove can also be arranged in other shapes as long as the purposes of supporting the display screen 1 and stress dispersion can be achieved. The embodiments of the present application do not make any limitation in this regard.

[0099] It should be noted that when at least one of the one or more first connecting portions 31 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 make any limitation in this regard.

[0100] In some embodiments, the display screen further includes a surrounding portion 5. As Figure 4 shown, the surrounding portion 5 wraps the edge of the support layer 3, or as Figure 5 or Figure 6 shown, wraps the edges of the support layer 3, the bonding layer 2, and the functional layer 1.

[0101] In some embodiments, the surface of the functional layer 1 away from the support layer 3 protrudes from the surrounding portion 5, the surface of the support layer 3 away from the functional layer 1 protrudes from the surrounding portion 5, or is flush with the surrounding portion 5. That is to say, the thickness of the surrounding portion 5 is less than the sum of the thicknesses of the functional layer 1 and the support layer 3. In other words, the surrounding portion 5 does not affect the overall thickness of the display screen. Therefore, the thinness and lightness of the display screen can be achieved by separately reducing the thicknesses of the functional layer 1 and the support layer 3.

[0102] In some embodiments, the functional layer 1 is fixed on the support layer 3, 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. Herein, the first projection refers to the projection of the support layer 3 and the surrounding portion 5 in the thickness direction of the support layer 3, and the second projection refers to the projection of the functional layer 1 in the thickness direction of the support layer 3. The surface of the functional layer 1 away from the support layer 3 protrudes from the surrounding portion 5, the surface of the support layer 3 away from the functional layer 1 protrudes from the surrounding portion 5, or is flush with the surrounding portion 5.

[0103] When the surrounding portion wraps the edge of the support layer, in some embodiments, as Figure 4 shown, the cross-section of the border 51 of the surrounding portion 5 can be U-shaped. When the cross-section of the border 51 is U-shaped, in one possible implementation, both sides of the edge of the support layer 3 are stepped, and the border 51 is fixed to the edge of the support layer 3. That is, a first step is provided in the thickness direction on the surface of the support layer 3 close to the functional layer 1, and a second step is provided in the thickness direction on the surface of the support layer 3 away from the functional layer 1. The border 51 is fixed to the edge of the support layer 3 through the step surfaces of the first step and the second step. In other words, the border 51 with a U-shaped cross-section can be first buckled on the step surfaces of the first step and the second step, thereby fixing the border 51 to the edge of the support layer 3 through the step surfaces of the first step and the second step.

[0104] It should be noted that the border 51 can be fixed to the step surfaces of the first step and the second step respectively through double-sided adhesive, thereby fixing the border 51 to the edge of the support layer 3. Of course, the border 51 can also be fixed to the step surfaces of the first step and the second step respectively by other means, and the embodiments of the present application do not make specific limitations in this regard.

[0105] In some embodiments, when the cross-section of the border 1 is U-shaped, in one possible implementation, the border 1 can include a first elastic member and a second elastic member arranged oppositely, and the border 1 is clamped to the edge of the support layer 3 through the first elastic member and the second elastic member. In other words, the border 1 can be clamped to the step surfaces of the first step and the second step through the first elastic member and the second elastic member. That is, the border 1 is clamped to the step surfaces of the first step and the second step through the first elastic member and the second elastic member, thereby fixing the border 1 to the edge of the support layer 3. In this way, when the support layer 3 is relatively thin, the problem of loosening of the border 1 caused by fixing the border 1 to the support layer 3 by means of screws and then loosening of the surrounding portion on the support layer 3 is avoided.

[0106] Further, in order to better fix the surrounding portion on the support layer 3, in some embodiments, an adhesive can be filled between the first elastic member and the functional layer 1, where the first elastic member refers to the elastic member located between the support layer 3 and the functional layer 1. In this way, in addition to clamping the frame 1 on the step surfaces of the first step and the second step through the first elastic member and the second elastic member to fix the frame 1 at the edge of the support layer 3, the first elastic member can also be bonded to the support layer 3 through the adhesive, so that the surrounding portion is more firmly fixed on the support layer 3.

[0107] When the cross-section of the frame 1 is U-shaped, in another possible implementation, the frame 1 can include a third elastic member and a first rigid member. The frame 1 is clamped at the edge of the support layer 3 through the first rigid member and the third elastic member, and the first rigid member is located between the support layer 3 and the functional layer 1. In other words, the first rigid member is located between the step surface of the first step and the functional layer 1, and the frame 1 can be clamped on the step surfaces of the first step and the second step through the first rigid member and the third elastic member.

[0108] In this implementation, in addition to being fixed between the step surface of the first step and the functional layer 1 through the first rigid member, the frame 1 is also clamped on the step surfaces of the first step and the second step through the first rigid member and the third elastic member under the elastic force of the third elastic member. That is to say, it also plays a dual role of fixing the frame 1 on the support layer 3, thereby avoiding the problem of loosening of the surrounding portion caused by the easy loosening of the frame 1.

[0109] Among them, the first rigid member can be fixed between the step surface of the first step and the functional layer 1 through double-sided tape. Of course, the first rigid member can also be fixed between the step surface of the first step and the functional layer 1 in other ways, and the embodiments of the present application do not make specific limitations on this.

[0110] When the cross-section of the frame 1 is U-shaped, in yet another possible implementation, the frame 1 can include a fourth elastic member and a fourth rigid member. The fourth elastic member is fixed between the step surface of the first step and the functional layer 1, and the frame 1 can be clamped on the step surfaces of the first step and the second step through the fourth rigid member and the fourth elastic member.

[0111] In this implementation, in addition to being fixed between the step surface of the first step and the functional layer 1 through the fourth elastic member, the frame 1 is also clamped on the step surfaces of the first step and the second step through the fourth rigid member and the fourth elastic member under the elastic force of the fourth elastic member. That is to say, it also plays a dual role of fixing the frame 1 on the support layer 3, thereby avoiding the problem of loosening of the surrounding portion caused by the easy loosening of the frame 1.

[0112] Among them, the fourth elastic member can be fixed between the stepped surface of the first step and the functional layer 1 by double-sided tape. Of course, the fourth elastic member can also be fixed between the stepped surface of the first step and the functional layer 1 by other means, and the embodiments of the present application do not make specific limitations in this regard.

[0113] When the cross-section of the frame 1 is U-shaped, in another possible implementation manner, the frame 1 may include a second rigid member and a third rigid member. The frame 1 is clamped on the edge of the support layer 3 by the second rigid member and the third rigid member, and the second rigid member is located between the support layer 3 and the functional layer 1. In other words, the second rigid member is fixed between the stepped surface of the first step and the functional layer 1, and the third rigid member is fixed on the stepped surface of the second step. Among them, the second rigid member can be fixed between the stepped surface of the first step and the functional layer 1 by double-sided tape. Of course, the second rigid member can also be fixed between the stepped surface of the first step and the functional layer 1 by other means, and the embodiments of the present application do not make specific limitations in this regard. In addition, the third rigid member can be fixed on the stepped surface of the second step by double-sided tape. Of course, the third rigid member can also be fixed on the stepped surface of the second step by other means, and the embodiments of the present application do not make specific limitations in this regard.

[0114] In some other embodiments, such as Figure 6 As shown, the inner wall of the surrounding portion 5 is a stepped structure in the thickness direction, and the edge of the support layer 3 is a stepped structure in the thickness direction. The stepped surface of the support layer 3 is fixedly connected to the stepped surface of the surrounding portion 5.

[0115] When the inner wall of the surrounding portion 5 is a stepped structure in the thickness direction, in a possible implementation manner, as Figure 6 As shown, the stepped surface of the surrounding portion 5 faces the direction of the functional layer 1. Correspondingly, the stepped surface of the support layer 3 can face away from the direction of the functional layer 1. Then, the stepped surface of the support layer 3 and the stepped surface of the surrounding portion 5 can be fixedly connected.

[0116] When the inner wall of the surrounding portion 5 is a stepped structure in the thickness direction, in another possible implementation manner, the stepped surface of the surrounding portion 5 faces away from the direction of the functional layer 1. Correspondingly, the stepped surface of the support layer 3 can face the direction of the functional layer 1. Then, the stepped surface of the support layer 3 and the stepped surface of the surrounding portion 5 can be fixedly connected.

[0117] When the surrounding portion 5 wraps the edges of the support layer 3, the bonding layer 2, and the functional layer 1, as Figure 5As shown, in some embodiments, the inner wall of the surrounding portion 5 has a stepped structure in the thickness direction to form two inner ring surfaces. The first inner ring surface is fixedly connected to the side surface of the support layer 3. The first inner ring surface refers to one of the two inner ring surfaces that is farther from the outer wall of the surrounding portion. The second inner ring surface is fixedly connected to the edge of the functional layer 1. The second inner ring surface refers to one of the two inner ring surfaces that is closer to the outer wall of the surrounding portion 5.

[0118] Among them, the first inner ring surface can be fixedly connected to the side surface of the support layer 3 through double-sided tape. Of course, the first inner ring surface can also be fixedly connected to the side surface of the support layer 3 in other ways. For example, the side surface of the support layer 3 can be fixedly connected to the first inner ring surface through screws. The embodiments of the present application do not make specific limitations on this.

[0119] When the side surface of the support layer 3 is fixedly connected to the first inner ring surface through screws, in some embodiments, threaded holes can be provided on the side surface of the support layer 3, and countersunk holes can be provided on the surface of the first inner ring surface of the surrounding portion opposite to the first inner ring surface. In this way, the screw can pass through the threaded hole fixed to the support layer 3 by the surrounding portion, and the head of the screw can sink into the countersunk hole.

[0120] In addition, the second inner ring surface can be fixedly connected to the edge of the functional layer 1 through double-sided tape. Of course, the second inner ring surface can also be fixedly connected to the edge of the functional layer 1 in other ways. The embodiments of the present application do not make specific limitations on this.

[0121] In some other embodiments, as Figure 7 shown, the inner wall of the surrounding portion has a stepped structure in the thickness direction to form two inner ring surfaces, and the edge of the support layer 3 has a stepped structure in the thickness direction to form 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 farther from the outer wall of the surrounding portion, and the first outer ring surface refers to one of the two outer ring surfaces that is closer to the center of the support layer 3. The second inner ring surface is fixedly connected to the second outer ring surface and the edge of the functional layer 1 respectively. The second inner ring surface refers to one of the two inner ring surfaces that is closer to the outer wall of the surrounding portion, and the second outer ring surface refers to one of the two outer ring surfaces that is farther from the center of the support layer 3.

[0122] Among them, the first inner ring surface and the first outer ring surface can be fixedly connected through double-sided tape. Of course, the first inner ring surface and the first outer ring surface 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 can be fixedly connected to the second outer ring surface and the edge of the functional layer 1 respectively through double-sided tape. Of course, the second inner ring surface can also be fixedly connected to the second outer ring surface and the edge of the functional layer 1 respectively in other ways. The embodiments of the present application also do not make specific limitations on this.

[0123] In addition, the area of the above-mentioned functional layer 1 can be equal to the area of the region enclosed by the second inner ring surface of the surrounding portion. In other words, the edge of the functional layer 1 can just abut against the second inner ring surface, so that gaps between the side surface of the functional layer 1 and the second inner ring surface can be avoided, preventing foreign matters such as dust from entering the gap between the functional layer 1 and the support layer 3 through this gap, and thus affecting the display effect of the display screen.

[0124] Furthermore, the side surface of the functional layer 1 and the second inner ring surface can be fixedly connected by double-sided tape, which can further avoid the appearance of gaps between the side surface of the functional layer 1 and the second inner ring surface, and thus better prevent foreign matters such as dust from entering the display screen.

[0125] In some embodiments, referring to Figure 5 , the surrounding portion 5 can include two relatively arranged surfaces, and the first surface of the two surfaces has a conical structure. The first surface refers to the surface on the same side as the surface of the functional layer 1 far from the support layer 3. In this way, when the audience views the display screen directly from the side where the optical film of the display screen is located, it can be seen that the first surface gradually shrinks in a conical shape to the side surface of the functional layer 1, weakening the presence of the first surface, thereby forming a "borderless" visual experience and improving the viewing effect of the display screen.

[0126] Among them, in some embodiments, the vertical distance between the surface of the functional layer 1 far from the support layer 3 and the first intersection line is in the range of 0.1 mm - 0. mm. The first intersection line refers to the intersection line between the first surface and the outer wall of the surrounding portion. Of course, the vertical distance between the surface of the functional layer 1 far from the support layer 3 and the first intersection line can also be within other distance ranges, and the embodiments of the present application do not make specific limitations in this regard.

[0127] In addition to the first intersection line formed between the first surface and the outer wall of the surrounding portion, a second intersection line is also formed between the first surface and the functional layer 1. In some embodiments, the second intersection line formed between the first surface and the functional layer 1 can be flush with the surface of the functional layer 1 far from the support layer 3, so that the entire display screen will look more neat. Of course, the second intersection line formed between the first surface and the functional layer 1 may not be flush with the surface of the functional layer 1 far from the support layer 3, and the embodiments of the present application do not make specific limitations in this regard.

[0128] It can be understood that for the entire display screen, the surrounding portion 5 generally plays a role in protecting the support layer 3 and the functional layer 1, increasing the strength of the entire display screen, and preventing the display screen from breaking. That is to say, the strength of the surrounding portion affects the strength of the entire display screen.

[0129] Therefore, the strength of the surrounding part is crucial to the strength of the display screen. It should be noted that the strength of the surrounding part is determined by the ratio of the shear modulus to the weight of the surrounding part. The larger the ratio of the shear modulus to the weight, the higher the strength of the surrounding part. It can be seen that appropriately reducing the weight of the surrounding part can increase the ratio of the shear modulus to the weight, thereby increasing the strength of the surrounding part. Based on this, in some embodiments, the border of the surrounding part can be a hollow structure. By setting the border included in the surrounding part as a hollow structure, the weight of the surrounding part can be reduced, thereby increasing the ratio of the shear modulus to the weight and enhancing the strength of the surrounding part.

[0130] Among them, in some embodiments, the cross-section of the inner cavity of the border can be circular or rectangular. Of course, the cross-section of the inner cavity can also be other shapes, and the embodiments of the present application do not make specific limitations on this.

[0131] In some other embodiments, the weight of the surrounding part can be reduced by setting a first groove ring on the step surface of the surrounding part. Specifically, a first groove ring can be provided on the step surface of the surrounding part. Correspondingly, a boss ring matching the first groove ring can be provided on the step surface of the support layer 3, and the boss ring is clamped in the first groove ring. In this way, on the one hand, the weight of the surrounding part can be reduced by setting the first groove ring, and the strength of the surrounding part can be increased. On the other hand, since a boss ring matching the first groove ring is provided on the step surface of the support layer 3, and the first groove ring and the boss ring match each other, in this way, the contact area between the support layer 3 and the surrounding part can also be increased, so that the surrounding part can be more firmly fixed on the support layer 3.

[0132] Furthermore, a second groove ring 3 can be provided on the surface of the surrounding part opposite to the step surface of the surrounding part, which can further reduce the weight of the surrounding part and further increase the strength of the surrounding part.

[0133] In still some other embodiments, in order to reduce the weight of the surrounding part, a first serrated structure 3 can be provided along the thickness direction on the first inner ring surface of the surrounding part. Correspondingly, a second serrated structure is provided along the thickness direction on the side surface of the support layer 3, and the first serrated structure 3 and the second serrated structure match each other. In this way, in addition to reducing the weight of the surrounding part and increasing the strength of the surrounding part, the contact area between the support layer 3 and the surrounding part can also be increased, so that the surrounding part can be more firmly fixed on the support layer 3.

[0134] It should be noted that the above-mentioned ways to increase the strength of the surrounding part are just several possible ways shown in the embodiments of the present application to increase the strength of the surrounding part. Of course, the strength of the surrounding part can also be increased by other ways, that is, as long as the strength of the surrounding part can be increased, the embodiments of the present application do not make specific limitations on the ways to increase the strength of the surrounding part.

[0135] In some embodiments, such as Figure 8 shown, the frame 51 of the surrounding portion 5 includes an insertion portion 511. The insertion portion 511 is vertically fixed on the second inner ring surface. The insertion portion 511 is clamped between the functional layer 1 and the support layer 3, and can seal the gap between the functional layer 1 and the support layer 3. In this way, when fine dust enters the minute gaps between the surrounding portion 5 and the support layer 3 and between the surrounding portion 5 and the functional layer 1, under the action of the insertion portion 511, it cannot continue to enter the gap between the functional layer 1 and the support layer 3. Therefore, the situation where fine dust seriously affects the display effect of the display screen can be avoided.

[0136] In some embodiments, the thickness of the insertion portion 511 in the thickness direction of the surrounding portion 5 is not greater than 0.1 mm. Of course, based on different application scenarios, the thickness of the insertion portion 511 in the thickness direction of the surrounding portion 511 can also be other values, as long as it can seal the gap between the functional layer 1 and the support layer 3. The embodiments of the present application do not make specific limitations on this.

[0137] In addition, the material of the insertion portion 511 can be elastic rubber. In this way, it can better play the role of sealing the gap between the functional layer 1 and the support layer 3. Of course, the material of the insertion portion 511 can also be other materials. The embodiments of the present application do not make specific limitations on this.

[0138] In the embodiments of the present application, through the support of the support layer for the functional layer, the flatness of the functional layer is ensured, and the display effect of the picture is improved. In addition, since the total thickness of the functional layer, the adhesive layer, and the support layer is less than or equal to 5 mm, and the ratio of the shear modulus to the weight of the support layer is greater than or equal to the support threshold, while ensuring the ultra-thinness of the display screen, the situation where the functional layer is deformed due to the deformation of the support layer under external environmental factors is avoided.

[0139] Figure 9 is a schematic structural diagram of a projection device provided by an embodiment of the present application. Refer to Figure 9 , the projection device includes a projection host 10 and the display screen 20 provided in the above embodiment. The projection host 10 is located on the side of the display screen 20 close to the functional layer, and the light exit port of the projection host 10 faces the display screen 20. The projection host 10 is used to emit a light beam to the display screen 20, and the display screen 20 is used to receive the light beam emitted by the projection host 10 and perform picture display.

[0140] Among them, the display screen 20 involved in the embodiments of the present application can be as described in the above embodiments, and the embodiments of the present application will not be elaborated here.

[0141] In the embodiments of the present application, since the total thickness of the display screen of the projection device is less than or equal to 5 millimeters, and the ratio between the shear modulus and the weight of the support layer included in the display screen is less than the support threshold, the ultra-thinning of the display screen is achieved, and at the same time, the deformation that may occur in the support layer under the external environment is avoided, thereby avoiding the possibility of deformation of the display screen and ensuring the picture display effect of the display screen. In this way, when projecting through the projection host on the display screen, the projection effect of the projection device is improved.

[0142] The above are only illustrative 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 within the protection scope of the present application.

Claims

1. A display screen, characterized in that, The display screen includes: A functional layer for reflecting the light beam emitted by the projection host to display an image; An adhesive layer adhered to the functional layer; A support layer adhered to the side of the adhesive layer away from the functional layer, and the support layer is used to support the functional layer; A surrounding portion that wraps the edge of the support layer. Herein, both the surrounding portion and the support layer are on the same side of the functional layer facing the support layer, and the surface of the support layer away from the functional layer protrudes from the surrounding portion or is flush with the surrounding portion; The total thickness of the functional layer, the adhesive layer, and the support layer is less than or equal to 5 mm, and the ratio of the shear modulus to the weight of the support layer is greater than or equal to a support threshold, where the support threshold refers to the minimum ratio of the shear modulus to the weight when the support layer does not deform; Wherein, one or more first connection portions are provided on the side of the support layer away from the functional layer, and the support layer is used to be fixedly connected in an embedded manner with one or more second connection portions correspondingly provided on the installation surface through one or more of the first connection portions. After each first connection portion is fixedly connected to the corresponding second connection portion, the distance between the side of the support layer away from the functional layer and the installation surface is less than 1 mm.

2. The display screen according to claim 1, characterized in that, The support threshold is 4, 4.2, or 4.

4.

3. The display screen according to claim 1, characterized in that, The material of the support layer is a fiberglass board, a polymethyl methacrylate (PMMA) board, a polyethylene terephthalate (PET) board, or a carbon fiber composite board.

4. The display screen according to claim 3, characterized in that, The thickness of the support layer is in the range of 0.1 mm to 2 mm.

5. The display screen according to any one of claims 1-4, characterized in that The functional layer is an optical film, and the optical gain of the functional layer is in the range of 0.3 to 1.

3.

6. The display screen according to claim 5, characterized in that, The thickness of the functional layer is in the range of 0.1 mm to 1.6 mm.

7. The display screen according to claim 5, characterized in that, The optical film is a Fresnel optical film or a white glass fiber screen.

8. The display screen according to any one of claims 1-4, characterized in that, The adhesive layer is a film adhesive or a double-sided adhesive, and the thickness of the adhesive layer is in the range of 0.05 mm to 0.3 mm.

9. The display screen according to claim 8, characterized in that The peel strength of the adhesive layer is greater than or equal to 1 N / cm.

10. A projection device, characterized in that, The projection device includes a projection host and the display screen according to any one of claims 1-9 above; The projection host is located on the side of the display screen close to the functional layer, and the light exit 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 image display.

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