CN114005363A - Back support assembly for curved display, curved display and display device - Google Patents
Back support assembly for curved display, curved display and display device Download PDFInfo
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- CN114005363A CN114005363A CN202111273418.6A CN202111273418A CN114005363A CN 114005363 A CN114005363 A CN 114005363A CN 202111273418 A CN202111273418 A CN 202111273418A CN 114005363 A CN114005363 A CN 114005363A
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- G—PHYSICS
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- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Abstract
The invention provides a back support assembly for a curved display, a curved display and a display device. This a back support assembly for curved surface display includes first supporting layer, first supporting layer includes: the supporting substrate is provided with a first surface and a second surface which are oppositely arranged, and the supporting substrate is provided with a pore; a metal filler distributed on the first surface and adhered to at least a portion of the inner walls of the pores. Therefore, the back support assembly can be well attached to one side of a curved display panel of the curved display, and the edge of the curved surface is not easy to wrinkle or break; the first supporting layer has good impact resistance, and the stability of the curved surface display can be improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a back support assembly for a curved display, the curved display and a display device.
Background
Flexible displays have high flexibility, light weight, thinness, etc., and are attracting much attention. The display has flexibility, can realize local tensile or compression deformation, and researchers can freely design the space shape and the three-dimensional shape of the display, which undoubtedly injects infinite imagination space and possibility for the application of the display in the future. Special-shaped displays, particularly curved displays including spatial biaxial curvature shapes, are gaining wide attention from researchers and users today as flexible displays are becoming more sophisticated.
The shape of the curved surface in space is classified into a shape of uniaxial curvature (e.g., cylindrical shape) and a shape of biaxial curvature (e.g., spherical shape, tetrahedral shape, or other curved surface of revolution). The difficulty of attaching the film layers to different space curved surface matrixes is very different, wherein the matching of the curved surface matrixes with the single-axis curvature shapes can be realized in a complete film layer lightening and thinning mode; however, matching a curved substrate with a biaxial curvature shape is difficult to achieve by making the complete film layer thinner. In addition, the metal foil is a commonly used heat-conducting and electromagnetic shielding material, but has limited local stretching and compressing capacity, and when the metal foil is attached to a spatially curved substrate, local folds or fractures are inevitably generated, so that the application of the metal foil in a flexible display device is limited.
Therefore, the performance of the current back support assembly for curved displays is yet to be further improved.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, an object of the present invention is to provide a back support assembly for a curved display, which can achieve local stretching or compression and is not easily wrinkled or broken when attached to a display panel of the curved display.
In one aspect of the invention, the invention provides a back support assembly for a curved display, comprising a first support layer comprising: the supporting substrate is provided with a first surface and a second surface which are oppositely arranged, and the supporting substrate is provided with a pore; a metal filler distributed on the first surface and adhered to at least a portion of the inner walls of the pores. Therefore, the back support assembly can be well attached to one side of a curved display panel of the curved display, and the edge of the curved surface is not easy to wrinkle or break; the first supporting layer has good impact resistance, and the stability of the curved surface display can be improved.
According to the embodiment of the invention, the porosity of the first supporting layer is 50-99%, and the volume density of the first supporting layer is 0.03-4.5 g/cm3。
According to the embodiment of the invention, the number of the holes passing through the first supporting layer per inch of length is 5-254.
According to an embodiment of the present invention, the first support layer has a thickness of 0.01mm to 1 mm.
According to an embodiment of the present invention, the material of the metal filler includes at least one of copper, nickel, aluminum, iron, gold, silver, and platinum.
According to an embodiment of the invention, a third surface of the first support layer is proximate to the second surface of the support matrix, the back support assembly further comprising: a second support layer disposed on a side proximate to the third surface; a first adhesive layer between the first support layer and the second support layer, wherein an edge of the first support layer and/or an edge of the second support layer has a plurality of openings.
According to an embodiment of the invention, an orthographic projection of the plurality of openings on the horizontal plane is at least one of a rectangle, a trapezoid, a triangle, a U-shape, a portion of a circle and a portion of an ellipse.
According to an embodiment of the invention, the opening satisfies at least one of the following conditions: the maximum width of the opening is 0.1 mm-2 mm; the depth of the opening is 0.5 mm-10 mm; the minimum distance between two adjacent openings is 0.1-5 mm; the side wall of the opening and the edge line of the first supporting layer and/or the second supporting layer connected with the side wall are intersected at an included angle of 60-120 degrees.
According to an embodiment of the present invention, the opening is located around an edge of the first support layer and/or around an edge of the second support layer, or the opening is located in an edge corner region of the first support layer and/or an edge corner region of the second support layer.
According to an embodiment of the invention, the second support layer satisfies at least one of the following conditions: the color is black; the thickness is 0.02-1 mm.
According to an embodiment of the invention, the back support assembly further comprises: the spacing layer is arranged on one side, close to the second supporting layer, of the first supporting layer, and the material of the spacing layer comprises at least one of polyimide, polyethylene terephthalate, polyurethane, organic silicon rubber, polyolefin, polyethylene and polypropylene or a foaming material of the organic silicon rubber; a second adhesive layer disposed between the spacer layer and the second support layer.
In another aspect of the present invention, the present invention provides a curved display, including: a curved display panel having a curved region; the cover plate is arranged on one side of the curved surface display panel; the back support assembly is arranged on one side, far away from the cover plate, of the curved surface display panel. Thus, the curved display has all of the features and advantages of the back support assembly described above and will not be described in detail herein. Generally, the back support assembly in the curved display combines well with the curved display panel, and the back support assembly can enhance the impact resistance of the curved display.
According to an embodiment of the invention, an edge of the first support layer and/or an edge of the second support layer in the back support assembly has a plurality of openings, at least a part of an orthographic projection of the openings on the curved display panel is located in the curved area.
In a further aspect of the invention, the invention provides a display device comprising a curved display as described above. Therefore, the display device has all the features and advantages of the curved display, and will not be described herein again. Overall, the display device has good stability.
Drawings
FIG. 1 shows a schematic structural view of a back support assembly according to one embodiment of the present invention;
FIG. 2 shows a schematic structural view of a back support assembly according to another embodiment of the present invention;
FIG. 3 shows a schematic microstructure of a first support layer according to an embodiment of the invention;
FIG. 4 shows a schematic structural view of a back support assembly according to yet another embodiment of the present invention;
FIG. 5 shows a schematic structural view of a back support assembly according to yet another embodiment of the present invention;
FIG. 6 shows a schematic structural view of a back support assembly according to yet another embodiment of the present invention;
FIG. 7 shows a schematic structural view of a back support assembly according to yet another embodiment of the present invention;
FIG. 8 illustrates a partial structural view of a back support assembly in accordance with yet another embodiment of the present invention;
FIG. 9 shows a partial schematic structural view of a back support assembly according to yet another embodiment of the invention;
FIG. 10 illustrates a partial structural view of a back support assembly in accordance with yet another embodiment of the present invention;
FIG. 11 illustrates a partial structural view of a back support assembly in accordance with yet another embodiment of the present invention;
FIG. 12 shows a partial schematic structural view of a back support assembly according to yet another embodiment of the invention;
FIG. 13 illustrates a partial structural view of a back support assembly in accordance with yet another embodiment of the present invention;
FIG. 14 shows a schematic view of an opening according to an embodiment of the present invention;
FIG. 15 shows a partial schematic structural view of a back support assembly according to yet another embodiment of the invention;
FIG. 16 shows a schematic structural view of a back support assembly according to yet another embodiment of the present invention;
FIG. 17 is a schematic diagram of a curved display according to another embodiment of the present invention;
FIG. 18 is a schematic diagram showing a partial structure of a curved display according to yet another embodiment of the present invention;
FIG. 19 is a schematic diagram showing a partial structure of a curved display according to another embodiment of the present invention;
FIG. 20 shows a schematic structural diagram of a cover plate according to an embodiment of the present invention;
FIG. 21 is a schematic diagram showing a partial structure of a curved display according to the present invention.
Detailed Description
The following describes embodiments of the present invention in detail. The following examples are illustrative only and are not to be construed as limiting the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications.
In one aspect of the present invention, which provides a back support assembly for a curved display, referring to fig. 1, a back support assembly 1000 includes a first support layer 100. The first support layer 100 includes a support substrate 110 and a metal filler 120, as shown in fig. 1, the support substrate 110 has a first surface 111 and a second surface 112 opposite to each other, and the support substrate has a void 113 therein, the metal filler 120 is distributed on the first surface 110, and the metal filler 120 is attached to at least a portion of an inner wall of the void 113.
According to the invention, the first supporting layer of the back supporting assembly is composed of a supporting base body with a porous structure and metal filler attached to the supporting base body (as shown in figures 1 and 2), the metal filler forms a metal three-dimensional skeleton (as shown in figure 3) based on the supporting base body, when the back supporting assembly is attached to a curved display panel, the supporting base body filled with the metal filler can realize local stretching or compression through pore deformation, and the poor problems of wrinkling or fracture and the like of the back supporting assembly during attachment can be avoided; moreover, the back support assembly has good heat conduction and electromagnetic shielding functions due to the arrangement of the metal filler, the problem of local heat concentration of the display can be well solved after the back support assembly is applied to the curved-surface display, and the interference of external electromagnetic signals can be avoided.
According to the embodiment of the present invention, the porosity of the first support layer 100 may be 50% to 99%, for example, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 99%, etc., and the first support layer has a higher porosity, which is beneficial to improving the ductility of the first support layer, and can bear a higher tensile stress, so that the back support assembly can be better attached to the curved display panel. The inventor finds that if the porosity of the first support layer is too low, for example less than 50%, the first support layer is liable to not be stretched flexibly well, which is not favorable for the back support assembly to fit well on the curved display panel; if the porosity of the first supporting layer is too large, for example, greater than 99%, the content of the metal filler in the first supporting layer is too small, which may reduce the electrical and thermal conductivity of the back supporting assembly, and is not favorable for improving the performance of the back supporting assembly.
According to an embodiment of the present invention, the bulk density of the first support layer 100 may be 0.03 to 4.5g/cm3For example, it may be 0.03g/cm3、0.05g/cm3、0.08g/cm3、1.0g/cm3、1.2g/cm3、1.5g/cm3、1.8g/cm3、2.3g/cm3、2.5g/cm3、2.8g/cm3、3.5g/cm3、3.9g/cm3、4.2g/cm3、4.5g/cm3And the like, so that the first support layer has proper volume density and is combined on the curved display panel without causing obvious increase of the quality of the display panel; and the metal filler in the first supporting layer within the volume density range has proper content, which is beneficial to improving the overall performance of the back supporting component.
According to the embodiment of the invention, the number of the holes passing through the first supporting layer 100 per inch of length can be 5-254, for example, 5, 10, 25, 30, 50, 80, 100, 130, 150, 180, 200, 220, 240, 254, etc., so that the number of the holes in the first supporting layer is appropriate, which is beneficial to further improving the performance of the back supporting assembly and well forming the three-dimensional skeleton structure. The inventor finds that if the aperture of the single hole in the first supporting layer is large, the number of holes passing through per inch is small, which is not beneficial to improving the continuity of the metal filler, further leading to the reduction of the performance of the back supporting component and being not beneficial to forming a better three-dimensional framework structure; if the aperture of the single hole in the first support layer is too small, the number of holes passing through each inch is large, the preparation difficulty in the process is increased, and the reduction of the manufacturing cost is not facilitated.
According to the embodiment of the present invention, the thickness of the first support layer 100 may be 0.01mm to 1mm, for example, 0.01mm, 0.02mm, 0.05mm, 0.08mm, 0.1mm, 0.3mm, 0.5mm, 0.8mm, 1mm, etc., so that the first support layer has good electrical and thermal conductivity and has a suitable thickness, such that the first support layer can be locally stretched or compressed, which is more beneficial for the application of the back support assembly on the curved display. The inventor finds that if the thickness of the first support layer is less than 0.01mm, the electric conduction and heat conduction capabilities of the first support layer are relatively weak, and the application requirements of a display product are difficult to meet; if the thickness of the first supporting layer exceeds 1mm, the performance of adapting to local stretching or compression of the excessively thick first supporting layer is poor, so that the application of the back supporting component on the curved-surface display is limited, and the requirement of the form of the curved-surface display is difficult to meet.
According to an embodiment of the present invention, the material of the supporting substrate 110 may include at least one of polyethylene foam, polypropylene foam, polyurethane foam, polystyrene foam, polyolefin foam, polyacrylate foam, polyvinyl chloride foam, phenolic resin foam, epoxy resin foam, nitrile rubber foam, silicone rubber foam, foaming starch, foaming cellulose, and the like, the material has a wide source, which is beneficial to reducing the manufacturing cost of the back supporting assembly, and the material is used as the supporting substrate, and the metal filler may be formed on the surface and in the pores of the supporting substrate by using electroplating, deposition, magnetron sputtering, or the like, which is mature in process, so as to improve the performance of the back supporting assembly.
According to an embodiment of the present invention, the material of the metal filler 120 may include at least one of copper, nickel, aluminum, iron, gold, silver, and platinum. According to some embodiments of the present invention, the material of the metal filler 120 may be one of copper, nickel, aluminum, iron, gold, silver, and platinum; according to other embodiments of the present invention, the material of the metal filler 120 may also be two or more of copper, nickel, aluminum, iron, gold, silver, and platinum; according to further embodiments of the present invention, the material of the metal filler 120 may also be an alloy including one or more of the above metals and other elements. Thereby, the performance of the back support assembly is advantageously improved. According to some embodiments of the present invention, the metal filler 120 may be aluminum or copper, so that a metal with a lower density is used as the metal filler, which is beneficial to the weight reduction of the back support assembly, and when the back support assembly is applied to a curved display, the weight reduction of the curved display is beneficial.
The back support assembly of the present invention may further include other structures, and in particular, referring to fig. 4, the first support layer 100 has a third surface 130, wherein the third surface 130 of the first support layer 100 is adjacent to the second surface 112 of the support base 110 (the support base is not shown in fig. 4, and the structure of the support base can refer to fig. 1), the back support assembly 1000 further includes a second support layer 200 and a first adhesive layer 300, the second support layer 200 is disposed at a side adjacent to the third surface 130, and the first adhesive layer 300 is disposed between the first support layer 100 and the second support layer 200, for strongly adhering the second support layer and the first support layer together, thereby improving the structural stability of the back support assembly.
According to an embodiment of the present invention, the color of the second support layer 200 may be black, and thus, the second support layer may shield the curved display panel from ambient light.
According to the embodiment of the invention, the thickness of the second supporting layer is 0.02-1 mm, for example, 0.02mm, 0.05mm, 0.08mm, 0.1mm, 0.3mm, 0.6mm, 0.8mm, 1mm, and the like, so that the light shielding capability of the second supporting layer with the thickness can be further improved, and the influence of ambient light on the display panel can be avoided. The inventor finds that if the thickness of the second supporting layer is less than 0.02mm, the heat insulation and light shielding capacity of the second supporting layer is relatively weak, and the product application requirements are difficult to meet; if the thickness of the second support layer exceeds 1mm, the flexibility of the second support layer is relatively poor due to the excessive thickness, and the second support layer is difficult to adapt to the requirements of a curved display panel.
In addition, according to an embodiment of the present invention, the second supporting layer 200 may be made of polyurethane foam, polystyrene foam, polyolefin foam, polyacrylate foam, silicone rubber foam, or the like, and the second supporting layer has a certain porosity, so that the second supporting layer can absorb back impact and avoid damage to the display panel; in addition, the second supporting layer made of the high polymer material can also play a role in heat insulation of the back of the display. According to some embodiments of the present invention, the material of the second supporting layer 200 is polyacrylate foam, and the preparation process of the material is relatively mature, and the porosity of the material is easily adjusted to form the second supporting layer with more excellent performance.
According to some embodiments of the present invention, the material of the first adhesive layer 300 may be an inorganic adhesive, such as a pressure sensitive adhesive, which can achieve a good bonding between the first supporting layer 100 and the second supporting layer 200, and is beneficial to improving the overall performance of the back support assembly. According to some embodiments of the present invention, the thickness of the first adhesive layer may be 0.01mm to 0.1mm, for example, 0.01mm, 0.02mm, 0.05mm, 0.08mm, 0.1mm, and the like, and the thickness of the first adhesive layer is set within the above range, which is beneficial to improve the bonding force between the first supporting layer and the second supporting layer, and is beneficial to further improve the stability of the back support assembly.
In the case of a display having a shape including biaxial curvature, such as a spherical surface or a four-curved surface, the display panel is generally shaped into a spherical surface or a four-curved surface, and the edge of the display panel is also generally shaped into a curved surface. The existing back support assembly is usually a complete membrane material, when the planar back support assembly is attached to the display panel, redundancy is easy to generate, the adaptability is poor, the reason is that the membrane layer of the planar back support assembly can deform when being matched with the biaxial curvature display panel, redundant parts are difficult to absorb through material compression deformation due to redundant length, and when the redundancy is too much (when the redundancy of a local area cannot be absorbed through material compression), the attachment edge can be folded or even broken, and the like. That is, the core contradiction existing in the bonding of the planar film material and the curved display panel is the problem that the redundant quantity cannot be absorbed after the planar material is matched with the display panel with the biaxial curvature shape. The inventor finds that when the two-dimensional shape film (the plane film) is matched with the display panel with the shape of biaxial curvature, the required theoretical compression amount is gradually increased from the center to the edge, therefore, if the redundancy is too much, the edge will wrinkle first, therefore, the inventor finds through a large number of experiments that the effect of improving the wrinkle is more remarkable in the plane film edge opening compared with the in-plane opening, that is, the edge can be opened by adjusting the edge of at least part of the structure of the back support assembly, and the back support assembly after the edge opening can absorb more redundancy through deformation, so as to better adapt to the display panel with the shape of a curved surface.
Fig. 5 to 13 show a planar structure or a partial planar structure of the first support layer and/or the second support layer, and as can be seen from fig. 5 to 13, the edge of the first support layer 100 and/or the edge of the second support layer 200 has a plurality of openings 10. It should be noted that, in the present invention, a plurality of openings may be provided only at the edge of the first support layer; it is also possible to provide a plurality of openings only at the edges of the second support layer; it is also possible to provide openings both at the edge of the first support layer and at the edge of the second support layer. According to the invention, the plurality of openings are arranged at the edge of the first supporting layer and/or the edge of the second supporting layer, so that more redundancy can be absorbed through the compression deformation of the edge opening when the back supporting component is attached to the curved surface display panel, the problem of edge wrinkle during attachment is improved, and the back supporting component can be better adapted to the curved surface display panel.
According to an embodiment of the present invention, referring to fig. 5 to 14, an orthographic projection of the plurality of openings 10 on a horizontal plane may be at least one of a rectangle, a trapezoid, a triangle, a U-shape, a portion of a circle, and a portion of an ellipse. As shown in fig. 5 to 8 and (a) of fig. 14, the opening 10 may be rectangular; as shown in fig. 9 and (B) of fig. 14, the opening 10 may be trapezoidal; as shown in fig. 10 and (C) of fig. 14, the opening 10 may be triangular; as shown in fig. 11 and (D) in fig. 14, the opening 10 may be U-shaped; as shown in fig. 12 and (E) in fig. 14, the opening 10 may be a part of an ellipse; as shown in fig. 13 and (F) in fig. 14, the opening 10 may be a portion of a circle. The opening sets up to above shape, when being favorable to laminating curved surface display panel with back supporting component on, absorbs certain redundancy through compressive deformation, and then is favorable to improving back supporting component and curved surface display panel's suitability. It should be noted that the orthographic projection of the opening on the horizontal plane refers to the shape of the opening when the opening is arranged on the first support layer and/or the second support layer of the back support assembly, and the first support layer and/or the second support layer is spread out flatly. It should be noted that, due to the manufacturing process problem, the orthographic projection of the opening on the horizontal plane is not necessarily a part of an absolute rectangle, trapezoid, triangle, U-shape, ellipse or a part of a circle, as long as it is approximated to the above figure. In addition, in the same back support assembly, the plurality of openings can be in the same shape or different shapes, and a person skilled in the art can design the back support assembly according to actual conditions as long as the back support assembly can absorb a certain redundancy amount and effectively avoid defects such as folds and the like.
Fig. 15 is a partial structural view illustrating the back support assembly, and according to an embodiment of the present invention, the maximum width W of the opening 10 may be 0.1mm to 2mm, for example, 0.1mm, 0.2mm, 0.5mm, 0.8mm, 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, and the like, thereby facilitating the opening to absorb the redundant amount by deformation, and further avoiding the problem that the back support assembly is easily wrinkled when being attached to the display panel. The inventor finds that if the maximum width of the opening is too small, it is difficult to achieve an increase in the flexible deformability of the back support assembly, which is detrimental to the ability of the edges of the back support assembly to absorb redundancy through deformation of the opening; if the maximum width of the opening is too large, the continuity of the whole structure of the back support assembly is poor, the back support assembly is easy to break, and the use requirement cannot be met.
According to the embodiment of the present invention, as shown in fig. 15, the depth L of the opening 10 may be 0.5mm to 10mm, for example, 0.5mm, 0.8mm, 1mm, 1.5mm, 2mm, 3mm, 5mm, 7mm, 8mm, 10mm, etc., and thus, the depth of the opening is set within the above range, and the opening can absorb a certain amount of redundancy through deformation, which is beneficial to improving the performance of the back support assembly and the adaptability of the back support assembly to the curved display panel. The inventors found that if the depth of the opening is less than 0.5mm, it is difficult to absorb a sufficient amount of redundancy through deformation of the edge opening, and it is difficult to solve the problem of edge wrinkling; if the depth of the opening is greater than 10mm, the continuity of the local structure of the opening region may be poor, and the opening region may be easily broken, which may make it difficult to meet the use requirement.
According to the embodiment of the present invention, as shown in fig. 6, the minimum distance S between two adjacent openings 10 may be 0.1mm to 5mm, for example, the minimum distance S between two adjacent openings 10 may be 0.1mm, 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1mm, 2mm, 3mm, 4mm, 5mm, and the like, and the opening distance is set within the above range, so that the openings absorb a certain amount of redundancy through deformation, which is beneficial to improving the performance of the back support assembly and the degree of fit between the back support assembly and the curved display panel, and the back support assembly can be well fitted with the curved display panel. The inventor finds that if the minimum distance between two adjacent openings is too large, the flexible deformation capacity of the back support assembly is difficult to improve, and good fit between the back support assembly and the curved display panel is not facilitated; and if the minimum interval between two adjacent openings is undersized, then lead to back support assembly's overall structure's continuity relatively poor easily, back support assembly easily breaks, is difficult to satisfy the user demand.
According to some embodiments of the present invention, as shown in fig. 5 and 6, the openings 10 may be located around the edge of the first support layer and/or around the edge of the second support layer, where the minimum distance S between two adjacent openings is the minimum distance between any two adjacent openings; according to other embodiments of the present invention, as shown in fig. 7, the openings 10 may also be located in the edge corner region of the first support layer and/or the edge corner region of the second support layer, where the minimum distance S between two adjacent openings is the minimum distance between two adjacent openings in the same edge corner region. Therefore, when the opening is arranged at the position, the back support assembly can be attached to the curved display panel, a certain redundancy is absorbed through the deformation of the edge opening, and the adaptability between the back support assembly and the curved display panel is further improved.
According to an embodiment of the present invention, referring to fig. 15, an included angle a between the sidewall 11 of the opening 10 and the edge line 20 of the first support layer 100 and/or the second support layer 200 connected to the sidewall 11 may be 60 to 120 degrees, for example, 60 degrees, 80 degrees, 90 degrees, 100 degrees, 120 degrees, and the like, and thus, when the included angle is set within the above range, the edge opening can achieve the purpose of locally absorbing the deformation amount through deformation, thereby facilitating the good attachment of the back support assembly and the curved display panel. The inventors have found that if the included angle exceeds this range, the distribution of the openings tends to be uneven, and even if the included angle at which the side walls of only some of the plurality of openings intersect with the edge line of the first support layer (and/or the second support layer) connected to the side walls does not satisfy the above requirements, the structural strength of the back support assembly tends to be reduced, and large deformation or even breakage tends to occur. According to some embodiments of the present invention, the included angle may be 90 degrees, that is, the sidewall of the opening and the edge line of the first supporting layer (and/or the second supporting layer) are perpendicular to each other, thereby facilitating further enhancing the fitting effect between the back support assembly and the curved display panel.
It should be noted that the angle at which the side wall 11 of the opening 10 intersects the edge line 20 of the first support layer 100 (and/or the second support layer 200) connected to the side wall 11 should be broadly understood, that is, the angle includes the following cases:
1. as shown in fig. 9, the sidewall 11 of the opening 10 is a straight line segment, and the edge line 20 of the first supporting layer (and/or the second supporting layer) connected to the sidewall 11 of the opening 10 is also a straight line segment, in this case, the included angle a is the included angle between the sidewall 11 and the edge line 20.
2. As shown in fig. 15, the sidewall 11 of the opening 10 is a straight line segment, and the edge line 20 of the first support layer (and/or the second support layer) connected to the sidewall 11 of the opening 10 is a curved line segment, in which case the included angle a is the included angle formed between the sidewall 11 and the tangent 30 at the intersection point of the edge line connected to the sidewall 11.
3. As shown in fig. 13, the sidewall 11 of the opening 10 is a curved segment, and the edge line 20 of the first support layer (and/or the second support layer) connected to the sidewall 11 of the opening 10 is a straight line segment, in which case, the included angle a should be the included angle formed between the tangent 12 of the sidewall 11 at the intersection point with the edge line 20 and the edge line 20.
4. As shown in fig. 12, the sidewall 11 of the opening 10 is a curved segment, and the edge line of the first support layer (and/or the second support layer) connected to the sidewall 11 of the opening 10 is also a curved segment, in this case, an included angle a formed by a tangent 12 of the sidewall 11 at an intersection point with the edge line and a tangent 30 of the edge line at the intersection point is an included angle formed by the sidewall of the opening and the edge line of the first support layer (and/or the second support layer) connected to the sidewall.
The opening can be formed by cutting with a cutter, laser cutting, exposure etching and the like, so that the edge opening can be formed by a mature process, the yield of finished products is improved, and the manufacturing cost can be reduced.
According to some embodiments of the present invention, as illustrated in fig. 16, the back support assembly 1000 may further include a spacer layer 400 and a second adhesive layer 500, wherein the spacer layer 400 is disposed on a side of the first support layer 100 adjacent to the second support layer 200, and the second adhesive layer 500 is disposed between the spacer layer 400 and the second support layer 200. Therefore, the spacer layer is arranged, so that the risk of structure puncture can be effectively avoided, namely, the first support layer is prevented from penetrating through the second support layer. The second bonding layer can firmly bond the spacing layer and the second supporting layer, and the stability of the back support assembly is improved. It should be noted that when the spacer layer is provided, the first adhesive layer 300 can still function to improve the stability of the back support assembly, and at this time, the second adhesive layer firmly bonds the first support layer 100 and the spacer layer 400.
According to the embodiment of the present invention, the material of the spacer layer 400 may include at least one of polyimide, polyethylene terephthalate, polyurethane, silicone rubber, polyolefin, polyethylene, and polypropylene, or a foam thereof, so that the first support layer may be more effectively prevented from penetrating the second support layer, which is beneficial to further improving the stability of the back support assembly.
In another aspect of the present invention, the present invention provides a curved display, as shown in fig. 17 and 18 (only a partial structure of the curved display is shown in fig. 18, and the edge curved region is not shown), which includes a curved display panel 2000, a cover plate 3000, and the aforementioned back support assembly 1000. Wherein the curved display panel 2000 has a curved area (e.g., a curved edge portion in fig. 17), the cover plate 3000 is disposed on one side of the curved display panel 2000, and the back support assembly 1000 is disposed on one side of the curved display panel 2000 away from the cover plate 3000. Therefore, the back support assembly is attached to the curved display panel, so that the back support assembly can be well attached to the curved display panel, and the problem of edge wrinkles can be avoided; moreover, the back support component can play a role in resisting impact, and when the curved-surface display is impacted, the back support component can well buffer so as to avoid the impact action from causing adverse effects on the curved-surface display; moreover, the three-dimensional metal network in the first supporting layer in the back supporting component can also play a role of electromagnetic shielding, so that adverse effects of surrounding electromagnetic fields on the display are prevented, the first supporting layer containing the metal filler can also well conduct electricity and heat, heat can be uniformly radiated, and overheating of a local area of the display is avoided.
The specific structure of the back support assembly of the curved display is consistent with that of the front back support assembly, and the specific structure of the back support assembly, the material, thickness, etc. of each layer have been described in detail in the foregoing, and are not described again.
According to an embodiment of the present invention, an edge of the first support layer 100 and/or an edge of the second support layer 200 in the back support assembly 1000 has a plurality of openings (not shown in fig. 17), and at least a portion of an orthographic projection of the openings on the curved display panel 2000 is located in the curved region (an edge bent portion in fig. 17). Therefore, the deformation of the opening is favorably utilized to absorb redundant quantity, so that the back support assembly is well combined with the display panel.
It will be understood by those skilled in the art that, as shown in fig. 17 to 19 (it should be noted that, only a part of the structure of the curved display is shown in fig. 18 and 19, and the edge curved region is not shown), the curved display may further include a polarizer 4000, a backing film 90 for supporting, and various adhesive layer structures (40, 50, 60, 70 in fig. 17 to 19) for bonding. For each adhesive layer structure, a skilled person in the art may select the material thereof according to actual needs, for example, the material of the adhesive layer between the cover plate 3000 and the polarizer 4000 may be an optically transparent adhesive, the material of the adhesive layer between the polarizer 4000 and the curved display panel 2000 may also be an optically transparent adhesive, the material of the adhesive layer between the back film 90 and the curved display panel 2000 may be a pressure-sensitive adhesive, and the material of the adhesive layer between the back film 90 and the second support layer 200 may also be a pressure-sensitive adhesive.
Fig. 20 shows a cover plate of a curved structure according to an embodiment of the present invention, which is briefly described as a back support assembly formed of a first support layer, and as shown in fig. 20, the edge of the cover plate has a curved portion, whereas as shown in fig. 21, when the back support assembly is combined with the cover plate, the back support assembly can be well attached to the entire cover plate without wrinkles.
In a further aspect of the invention, the invention provides a display device comprising a curved display as described above. Therefore, the display device has all the features and advantages of the curved display, and will not be described herein again. Generally speaking, the display device has good stability, uniform heat dissipation and is not easily interfered by electromagnetic fields in external environments.
According to the embodiment of the present invention, the specific type of the display device has no special requirement, and those skilled in the art can flexibly select the display device according to actual requirements, for example, the display device can be a mobile phone, an iPad, a notebook, or the like.
It can be understood by those skilled in the art that the display device has the necessary structure and components of a conventional display device in addition to the curved display, and for example, a mobile phone may further include necessary structures and components of a battery rear cover, a middle frame, an audio module, a main board, and the like in addition to the curved display.
The terms "first" and "second" are used herein for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description herein, reference to the terms "one embodiment," "another embodiment," "yet another embodiment," "some embodiments," "some specific embodiments," or "other specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (14)
1. A back support assembly for a curved display, comprising a first support layer, the first support layer comprising:
the supporting substrate is provided with a first surface and a second surface which are oppositely arranged, and the supporting substrate is provided with a pore;
a metal filler distributed on the first surface and adhered to at least a portion of the inner walls of the pores.
2. The back support assembly of claim 1, wherein the first support layer has a porosity of 50% to 99% and a bulk density of 0.03 to 4.5g/cm3。
3. The back support assembly of claim 2, wherein the first support layer has between 5 and 254 holes per inch of length.
4. The back support assembly of claim 1, wherein the first support layer has a thickness of 0.01mm to 1 mm.
5. The back support assembly of claim 1, wherein the metal filler comprises at least one of copper, nickel, aluminum, iron, gold, silver, and platinum.
6. The back support assembly according to any one of claims 1 to 5, wherein a third surface of the first support layer is proximate to the second surface of the support matrix,
the back support assembly further comprises:
a second support layer disposed on a side proximate to the third surface;
a first adhesive layer between the first support layer and the second support layer,
wherein the edge of the first support layer and/or the edge of the second support layer has a plurality of openings.
7. The back support assembly according to claim 6, wherein an orthographic projection of the plurality of openings in a horizontal plane is at least one of a rectangle, a trapezoid, a triangle, a U-shape, a portion of a circle, and a portion of an ellipse.
8. The back support assembly according to claim 6, wherein at least one of the following conditions is satisfied:
the maximum width of the opening is 0.1 mm-2 mm;
the depth of the opening is 0.5 mm-10 mm;
the minimum distance between two adjacent openings is 0.1-5 mm;
the side wall of the opening and the edge line of the first supporting layer and/or the second supporting layer connected with the side wall are intersected at an included angle of 60-120 degrees.
9. The back support assembly of claim 6, wherein the opening is located around an edge of the first support layer and/or around an edge of the second support layer,
or the opening is positioned in the edge corner area of the first supporting layer and/or the edge corner area of the second supporting layer.
10. The back support assembly according to claim 6, wherein the second support layer satisfies at least one of the following conditions:
the color is black;
the thickness is 0.02-1 mm.
11. The back support assembly of claim 6, further comprising:
the spacing layer is arranged on one side, close to the second supporting layer, of the first supporting layer, and the material of the spacing layer comprises at least one of polyimide, polyethylene terephthalate, polyurethane, organic silicon rubber, polyolefin, polyethylene and polypropylene or a foaming material of the organic silicon rubber;
a second adhesive layer disposed between the spacer layer and the second support layer.
12. A curved surface display, comprising:
a curved display panel having a curved region;
the cover plate is arranged on one side of the curved surface display panel; and
the back support assembly of any one of claims 1 to 11, disposed on a side of the curved display panel remote from the cover plate.
13. The curved display of claim 12, wherein an edge of the first support layer and/or an edge of the second support layer in the back support assembly has a plurality of openings, at least a portion of an orthographic projection of the openings on the curved display panel being located in the curved region.
14. A display device comprising the curved display of claim 12 or 13.
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