CN113990205A - Cover plate and display module - Google Patents
Cover plate and display module Download PDFInfo
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- CN113990205A CN113990205A CN202111408692.XA CN202111408692A CN113990205A CN 113990205 A CN113990205 A CN 113990205A CN 202111408692 A CN202111408692 A CN 202111408692A CN 113990205 A CN113990205 A CN 113990205A
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- 239000000758 substrate Substances 0.000 claims description 128
- 208000034189 Sclerosis Diseases 0.000 abstract description 32
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- 238000004519 manufacturing process Methods 0.000 description 5
- 239000002344 surface layer Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000006748 scratching Methods 0.000 description 3
- 230000002393 scratching effect Effects 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- -1 Polyethylene terephthalate Polymers 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 239000011368 organic material Substances 0.000 description 1
- 235000009537 plain noodles Nutrition 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- 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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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
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Abstract
The application provides a apron and display module assembly, apron include flexible basement and sclerosis layer, and at least some sclerosis layer is located the surface of flexible basement, is provided with the arch on at least one of flexible basement and sclerosis layer. The stress that receives on the arch can reduce the sclerosis layer to reduce the risk of sclerosis layer fish tail, with the life who promotes apron and display module assembly. Consequently, the apron and the display module assembly that this application embodiment provided can promote the ability of apron anti fish tail, promotes apron and display module assembly's life.
Description
Technical Field
The application relates to the technical field of display panels, in particular to a cover plate and a display module.
Background
In flexible display technology, the display panel has the advantages of being foldable or rollable. In order to meet the bending characteristic of the display panel, an organic material with better bending performance is selected to form the flexible cover plate, so that the hardness of the cover plate is reduced.
In the related art, when an impact is applied, the display panel is easily damaged due to the low hardness of the flexible cover plate. Therefore, a hardening layer can be arranged on the flexible cover plate, the flexibility of the cover plate is guaranteed, and meanwhile the hardness of the cover plate is improved, so that the display panel is protected.
However, the surface of the flexible cover plate is easily scratched, which reduces the service life of the cover plate.
Disclosure of Invention
In view of the above problem, the embodiment of the application provides a apron and display module assembly, can promote the ability of apron anti fish tail, promotes apron and display module assembly's life.
In order to achieve the above object, the embodiments of the present application provide the following technical solutions:
a first aspect of the embodiments of the present application provides a cover plate, including flexible base and sclerosis layer, at least some sclerosis layer is located the surface of flexible base, is provided with the arch on at least one of flexible base and sclerosis layer.
The utility model provides a apron, apron can be including flexible base and sclerosis layer, and at least some sclerosis layer is located the surface of flexible base, and the surface of sclerosis layer to the flexible base plays the guard action. At least one of the flexible substrate and the hardened layer is provided with a protrusion. The stress that receives on the arch can reduce the sclerosis layer to reduce the risk of sclerosis layer fish tail, with the life who promotes apron and display module assembly.
In one possible implementation, the protrusion is located on the flexible substrate, and the protrusion is located on a surface of the flexible substrate on a side close to and/or far from the hardened layer;
it is realized that the protrusions on the flexible substrate are integrally formed with the flexible substrate.
Like this, the arch can produce great deformation to release the stress on the sclerosis layer, thereby reduce the risk of sclerosis layer fish tail, in order to promote apron and display module's life.
In one possible implementation, the protrusion is located on the hardened layer, and the protrusion is located on a surface of the hardened layer on a side close to and/or far from the flexible substrate;
it is possible to realize that the protrusion on the hardened layer is integrally formed with the hardened layer.
Like this, because the area that the arch can increase the sclerosis layer can reduce the effort on the unit area of sclerosis layer to reduce the stress that distributes on the sclerosis layer, thereby reduce the risk of sclerosis layer fish tail.
In one possible implementation, the flexible substrate includes multiple layers, the multiple layers being arranged in a stack,
at least one layer of the multi-layer flexible substrate is provided with a bulge;
it can be realized that the flexible substrate provided with the bulge is attached to the hardened layer;
it is realized that each layer of flexible substrate is provided with protrusions.
Like this, the number of piles of flexible base is more, and bellied mode of setting is more, can satisfy different apron to bellied demand that sets up.
In one possible implementation, the hardened layer includes a plurality of layers, and the plurality of hardened layers includes a surface hardened layer located on a surface of an outermost flexible substrate of the at least two flexible substrates.
Therefore, the phenomenon that the bending characteristic of the cover plate is influenced due to the fact that the single hardened layer is too thick can be avoided.
In one possible implementation, the multiple hardened layers include an intermediate hardened layer located between two adjacent layers of the flexible substrate.
Therefore, the phenomenon that the bending characteristic of the cover plate is influenced due to the fact that the single hardened layer is too thick can be avoided.
In one possible implementation manner, the protrusions are point-shaped protrusions, and a plurality of point-shaped protrusions are arranged at intervals;
it can be realized that the shape of the point-like projection is any one or more of a column, a hemisphere and a cone.
Like this, the protruding volume of punctiform is less, and distribution that can be even is in each position of apron to all play the effect that reduces stress to each position of apron.
In one possible implementation manner, the protrusions are strip-shaped protrusions, a plurality of strip-shaped protrusions are arranged at intervals along the same direction, and each strip-shaped protrusion extends to the other end of the cover plate along one end of the cover plate;
the flexible substrate comprises a plurality of layers of flexible substrates, wherein at least two layers of the flexible substrates are provided with strip-shaped bulges, and the extending directions of the bulges on any two layers of the flexible substrates with the strip-shaped bulges are intersected;
it can be realized that the extending directions of the protrusions on any two layers of the flexible substrate with the strip-shaped protrusions are vertically crossed;
and/or at least two layers of the multiple layers of hardened layers are provided with strip-shaped bulges, and the extending directions of the bulges on any two layers of the hardened layers with the strip-shaped bulges are intersected;
it can be realized that the extending directions of the protrusions on any two layers of the hardened layers with the strip-shaped protrusions are vertically crossed;
and/or strip-shaped bulges are arranged on at least one layer of the plurality of layers of flexible substrates and at least one layer of the plurality of layers of hardened layers, and the extending direction of the bulge on any layer of the flexible substrate with the strip-shaped bulges is crossed with the extending direction of the bulge on any layer of the hardened layers with the strip-shaped bulges;
it is realized that the extending direction of the protrusions on any one of the flexible substrates having the stripe-shaped protrusions perpendicularly intersects the extending direction of the protrusions on any one of the hardened layers having the stripe-shaped protrusions.
Therefore, the extension directions of the first strip-shaped bulges and the second strip-shaped bulges are different, so that external force can be diffused to different positions of the cover plate through the first strip-shaped bulges and the second strip-shaped bulges, and the local stress on the cover plate is reduced.
In one possible implementation, the minimum thickness of each hardened layer ranges from 2 μm to 4 μm;
and/or each layer of flexible substrate has a thickness in the range of 5 μm to 15 μm;
and/or, each protrusion has a height in the range of 0.5 μm to 1.5 μm;
and/or, in the projections on the same layer, the distance between every two adjacent projections is less than or equal to 1.5 μm.
Thus, the cover plate can have good bending property and scratch resistance, and in addition, the thickness of the cover plate is small.
A second aspect of the embodiments of the present application provides a display module, including a display panel and the cover plate provided by the above first aspect, where the cover plate is located on a light emitting surface of the display panel.
The display module assembly that this application embodiment provided, display module assembly include the apron, and the apron can be including flexible base and sclerosis layer, and at least some sclerosis layer is located the surface of flexible base, and the surface of sclerosis layer to the flexible base plays the guard action. At least one of the flexible substrate and the hardened layer is provided with a protrusion. The stress that receives on the arch can reduce the sclerosis layer to reduce the risk of sclerosis layer fish tail, with the life who promotes apron and display module assembly.
The construction of the present application and other objects and advantages thereof will be more apparent from the following description of the preferred embodiments taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a cover plate according to an embodiment of the present disclosure;
fig. 2 is a schematic structural view of a stripe-shaped protrusion provided in an embodiment of the present application;
fig. 3 is a schematic structural view of another strip-shaped protrusion provided in the embodiment of the present application;
fig. 4 is a schematic structural diagram of a dot-shaped protrusion provided in an embodiment of the present application;
FIG. 5 is a sectional view taken along line A-A of FIG. 2;
FIG. 6 is another sectional view taken along line A-A of FIG. 2;
fig. 7 is a schematic structural diagram of a coating base station according to an embodiment of the present disclosure;
FIG. 8 is a schematic structural diagram of a flexible substrate provided in an embodiment of the present application in two layers;
FIG. 9 is a schematic diagram of a flexible substrate provided with a bump structure according to an embodiment of the present disclosure;
fig. 10 is a schematic structural diagram of another cover plate according to an embodiment of the present application.
Description of reference numerals:
100-a cover plate;
110-a flexible substrate;
120-a hardened layer;
121-surface layer hardening layer;
122-intermediate hardened layer;
130-a bump;
200-coating the base.
Detailed Description
In the related art, the cover plate may include a flexible substrate and a hardened layer, the flexible substrate is relatively soft, a bending characteristic of the cover plate may be realized, and the hardened layer may protect the flexible substrate.
However, the both sides on flexible basement and sclerosis layer are the plane, when receiving external force, and the stress on the sclerosis layer is great, leads to the easy fish tail of sclerosis layer to the life of apron and display module assembly has been reduced.
Based on foretell problem, this application embodiment provides a apron and display module assembly, and the apron can include flexible base and sclerosis layer, and at least partial sclerosis layer is located the surface of flexible base, and the surface of sclerosis layer to flexible base plays the guard action. At least one of the flexible substrate and the hardened layer is provided with a protrusion. The stress that receives on the arch can reduce the sclerosis layer to reduce the risk of sclerosis layer fish tail, with the life who promotes apron and display module assembly.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The display module provided by the present application will be described with reference to fig. 1 to 10.
The embodiment of the application provides a display module assembly, and this display module assembly includes display panel, and display panel includes play plain noodles and backlight face. The light-emitting surface is used for displaying pictures. The backlight surface is an opposite surface of the light-emitting surface along the thickness direction of the display module.
The display panel may be an Organic Light-Emitting Diode (OLED) display panel, or a Micro Light-Emitting Diode (Micro LED or μ LED) display panel.
The display module further comprises a cover plate 100, the cover plate 100 is located on a light emitting surface of the display panel, and the cover plate 100 protects the display panel.
The cover plate 100 provided in the present application will be described in detail below.
As shown in fig. 1, an embodiment of the present application provides a cover plate 100, and the cover plate 100 may be used in the display module in the above embodiments. As shown in fig. 2-4, the cover plate 100 may include a flexible substrate 110, and the flexible substrate 110 is relatively flexible, so that the bending characteristics (folding, rolling, etc.) of the cover plate 100 can be achieved. Among them, the flexible substrate 110 may be formed of a material having superior elasticity. For example, the material of the flexible substrate 110 may be made of a light-transmitting material such as Polyimide (PI), Polyethylene terephthalate (PET), and the like.
It is understood that the cover 100 may be applied to a flexible display panel, and may also be applied to a rigid display panel.
With continued reference to fig. 1, the cover sheet 100 may further include a stiffening layer 120, at least a portion of the stiffening layer 120 being located on the surface of the flexible substrate 110.
Specifically, the hardened layer 120 may be located on a side of the flexible substrate 110 away from the display panel to protect the flexible substrate 110 when used by a user, so as to protect the display module. The hardened layer 120 may also be located on a side of the flexible substrate 110 extending in the thickness direction, thereby protecting the side of the flexible substrate 110.
In this embodiment, at least one of the flexible substrate 110 and the hardened layer 120 is provided with the protrusion 130, and the protrusion 130 can reduce the stress on the hardened layer 120, thereby reducing the risk of scratching the hardened layer 120 and prolonging the service life of the cover plate 100 and the display module.
The number of the protrusions 130 may be multiple, and the protrusions 130 are arranged at intervals.
Implementations of disposing the protrusion 130 on the flexible substrate 110 and/or the hardened layer 120 include the following:
in a first implementation, as shown in fig. 5 and 6, the protrusion 130 is disposed on the flexible substrate 110, and the flexible substrate 110 and the protrusion 130 may be integrally formed to simplify the process. Alternatively, the flexible substrate 110 may be prepared separately, for example, the flexible substrate 110 may be prepared first, and then the protrusion 130 may be prepared on the flexible substrate 110, so that the flexible substrate 110 and the protrusion 130 may be made of different materials, and the material selection is more diversified.
As shown in fig. 7, the flexible substrate 110 having the protrusions 130 can be manufactured using the coating base 200, and the manufacturing process thereof is simple.
In some examples, the protrusion 130 may be disposed on a side of the flexible substrate 110 facing the hardened layer 120, such that when the cover plate 100 is acted by an external force, the external force acts on the hardened layer 120 first and then is transmitted to the protrusion 130, and the protrusion 130 may generate a large deformation, so as to release the stress on the hardened layer 120, thereby reducing the risk of scratching the hardened layer 120, and thus prolonging the service life of the cover plate 100 and the display module.
In other examples, the protrusion 130 may be disposed on a side of the flexible substrate 110 facing away from the hardened layer 120, and when the cover plate 100 is subjected to an external force, the external force first acts on the hardened layer 120 and then is transmitted to the protrusion 130 through the flexible substrate 110, since the protrusion 130 can generate a large deformation, thereby releasing the stress on the hardened layer 120.
In other examples, the protrusion 130 may be disposed on both the side of the flexible substrate 110 facing away from the hardened layer 120 and the side of the flexible substrate 110 facing the hardened layer 120. Due to the two layers of the protrusions 130, stress on the hardened layer 120 can be better released.
In a second implementation manner, the protrusion 130 is disposed on the hardened layer 120, and the hardened layer 120 and the protrusion 130 may be integrally formed to simplify the process. Alternatively, it may be prepared separately.
In some examples, the protrusion 130 may be disposed on a side of the hardened layer 120 away from the flexible substrate 110, such that when the cover plate 100 is acted by an external force, the external force is firstly acted on the protrusion 130 and then transmitted to the hardened layer 120, since the protrusion 130 can increase the area of the hardened layer 120, the acting force per unit area can be reduced, thereby reducing the stress distributed on the hardened layer 120, thereby reducing the risk of scratching the hardened layer 120, and the cover plate 100 and the display panel are not easily damaged, thereby prolonging the service life of the cover plate 100 and the display module.
In other examples, the protrusion 130 may be disposed on a side of the hardened layer 120 facing the flexible substrate 110, and an external force is first applied to the hardened layer 120 and then transmitted to the protrusion 130, so that the stress on the hardened layer 120 can be reduced because the protrusion 130 can increase the area of the hardened layer 120. In addition, the surface of the hardened layer 120 facing away from the flexible substrate 110 may be a planar structure, so that the surface flatness of the cover plate 100 is good.
In other examples, the protrusion 130 may be disposed on both the side of the hardened layer 120 facing away from the flexible substrate 110 and the side of the hardened layer 120 facing the flexible substrate 110, so that the stress on the hardened layer 120 can be reduced better due to the two layers of the protrusion 130.
In a third implementation, the protrusion 130 is disposed on both the stiffening layer 120 and the flexible substrate 110. The hardened layer 120 includes two surfaces spaced apart in a thickness direction of the display module, and the protrusion 130 is disposed on at least one of the surfaces. Meanwhile, the flexible substrate 110 includes two surfaces spaced apart in a thickness direction of the display module, and the protrusion 130 is disposed on at least one of the surfaces. The manner and principle of disposing the protrusion 130 on the hardened layer 120 and the flexible substrate 110 are similar to those of the first and second implementations, and are not described in detail.
In this embodiment, the flexible substrate 110 may be at least one layer. The flexible substrate 110 may be one layer, two layers, three layers or more.
As shown in fig. 1, when the flexible substrate 110 is a single layer, the cover plate 100 has a simple structure and is difficult to manufacture.
As shown in fig. 8 to 10, when the flexible substrate 110 includes a plurality of layers, the plurality of layers of flexible substrates 110 are stacked, and at least one layer of the plurality of layers of flexible substrates 110 is provided with the protrusion 130, so that the arrangement of the protrusion 130 is more, and the arrangement requirements of different cover plates 100 on the protrusion 130 can be met.
Among them, in the flexible substrate 110 provided with the protrusion 130, the protrusion 130 may be located on at least one of two surfaces of the flexible substrate 110 spaced apart in the thickness direction. For example, the protrusion 130 may be located on a side of the flexible substrate 110 facing the display panel, and the protrusion 130 may also be located on a side of the flexible substrate 110 facing away from the display panel.
Illustratively, the flexible substrate 110 provided with the protrusion 130 is attached to the hardened layer 120, so that the hardened layer 120 is closer to the flexible substrate 110 in the thickness direction, the external force is closer to the transmission distance between the hardened layer 120 and the protrusion 130, and the stress release speed is faster.
Illustratively, each layer of flexible substrate 110 has protrusions 130 disposed thereon. Thus, the number of layers of the protrusions 130 is large, and stress applied to the cover plate 100 can be improved.
In the present embodiment, the hardened layer 120 includes at least one layer. The hardened layer 120 may be one layer, two layers, three layers or more.
As shown in fig. 1, when the hardened layer 120 is a single layer, the structure of the cover plate 100 is simple and the manufacturing difficulty is low. At this time, the hardened layer 120 is located on a side of all the flexible substrates 110 facing away from the display panel, thereby protecting all the flexible substrates 110.
As shown in fig. 10, when the hardened layer 120 includes a plurality of layers, the multi-layer hardened layer 120 includes a surface layer hardened layer 121, and the surface layer hardened layer 121 is located on the surface of the flexible substrate 110 that is the outermost layer of at least two layers of the flexible substrate 110. The outermost flexible substrate 110 may be the flexible substrate 110 farthest from the display panel, so that the surface hardening layer 121 protects all of the flexible substrates 110. Alternatively, the hardened surface layer 121 may be located on a side surface of the flexible substrate 110 extending in the thickness direction of the display module, so that the hardened surface layer 121 may protect the side surface of the flexible substrate 110, thereby better protecting the flexible substrate 110.
In other examples, with continued reference to FIG. 10, the multiple stiffening layers 120 further include an intermediate stiffening layer 122, the intermediate stiffening layer 122 being located between two adjacent layers of the flexible substrate 110. Thus, the hardened layer 120 is divided into a plurality of layers, so that the thickness of the single hardened layer 120 can be reduced, and the problem that the strength of the hardened layer 120 is too high to realize the bending characteristic of the cover plate 100 due to the over-thickness of the single hardened layer 120 is avoided.
Specifically, flexible base 110 and the setting of piling up in turn of hardening layer 120 along the thickness direction of display module assembly, one deck hardening layer 120 can correspond and set up the one side that deviates from display panel at one deck flexible base 110, and each layer hardening layer 120 can all play the guard action to the rete towards display panel that is located this hardening layer 120.
It should be noted that the "film layer" in the present application refers to the flexible substrate 110, the hardened layer 120, or other film layers in the cover plate 100. For example, one flexible substrate 110 is a film layer, one hardened layer 120 is also a film layer, and the sum of the number of layers of the flexible substrate 110 and the hardened layer 120 is the total number of film layers. In some examples, when the protrusion 130 is disposed between two adjacent film layers, the protrusion 130 may be located on one of the two adjacent film layers, and a concave structure corresponding to the protrusion 130 may be disposed on the other of the two adjacent film layers, so that the protrusion 130 is embedded in the concave structure, and a contact area between the two adjacent film layers is larger, so that a connection force between the two adjacent film layers may be increased. In other examples, when two layers of protrusions 130 are disposed between two adjacent film layers, one of the protrusions 130 may be located on one of the two adjacent film layers, and the other protrusion 130 may be located on the other of the two adjacent film layers, in which case, the two layers of protrusions 130 may cause a gap to exist between the two adjacent film layers, and the gap may be filled with a material. The influence of the gap on the connection between the adjacent film layers is avoided.
The shape of the protrusion 130 will be explained below.
As shown in fig. 4, the protrusions 130 may be dot-shaped protrusions. For example, the shape of the dot-shaped protrusion may be any one or more of a columnar shape (e.g., a cylindrical shape or a prismatic shape), a hemispherical shape, and a conical shape. The volume of the punctiform protrusions is small, and the punctiform protrusions can be uniformly distributed at each position of the cover plate 100, so that the punctiform protrusions play a role in reducing stress at each position of the cover plate 100.
As shown in fig. 2 and 3, the protrusion 130 may be a bar-shaped protrusion, a plurality of bar-shaped protrusions are arranged at intervals along the same direction, and each bar-shaped protrusion extends from one end of the cover plate 100 to the other end of the cover plate 100. The shape of the strip-shaped protrusion is simple, and the difficulty in manufacturing the protrusion 130 can be reduced. In addition, when the strip-shaped bulges are acted by external force, the external force can be diffused along the extension direction of the strip-shaped bulges, so that the local stress of the strip-shaped bulges is reduced.
Illustratively, the cross-sectional shape of the strip-shaped protrusion may be semicircular, rectangular or other polygonal shapes along the direction perpendicular to the extending direction of the strip-shaped protrusion. Among the strip-shaped bulges with semicircular cross sections, the outer surfaces of the strip-shaped bulges are cambered surfaces, and the stress distribution on the cambered surfaces is uniform.
It is understood that, when the protrusions 130 are located on the flexible substrate 110, the protrusions 130 located on one side surface of the flexible substrate 110 are the same layer of protrusions 130, and the protrusions 130 located on the opposite surfaces of the flexible substrate 110 are two layers of protrusions 130, respectively. When the protrusion 130 is located on the hardened layer 120, the principle is similar and will not be described in detail.
The present application is described in detail with respect to the bar-shaped protrusions. The number of the layers of the strip-shaped bulges can be one layer, two layers, three layers or more.
When the number of the layers of the strip-shaped protrusions is more than two, the extending directions of at least two layers of the strip-shaped protrusions can have included angles, namely, the extending directions are different.
For example, the at least two layers of strip-shaped protrusions may include a first strip-shaped protrusion and a second strip-shaped protrusion, and the first strip-shaped protrusion and the second strip-shaped protrusion have different extending directions.
For example, when the number of the layer of the stripe-shaped protrusion is N (N is a positive integer greater than 2), the stripe-shaped protrusion may include a first stripe-shaped protrusion, a second stripe-shaped protrusion, a third stripe-shaped protrusion, … …, and an nth stripe-shaped protrusion, and the extending directions of at least two layers of the N layer of stripe-shaped protrusions are different. In the different layers of strip-shaped protrusions with intersecting extension directions, the external force is different along the diffusion directions of the strip-shaped protrusions, so that the external force can be diffused to different directions of the cover plate 100, and the stress on the cover plate 100 is uniform. Specifically, the extending directions of any two layers of the N layers of the strip-shaped protrusions may be different. For example, the extending directions of the two adjacent layers of strip-shaped protrusions may be different, and the included angle between the extending directions of the two adjacent layers of strip-shaped protrusions may be 30 °, 45 °, 60 °, 90 ° or other angles.
The N layers of the stripe-shaped protrusions may be all disposed on the flexible substrate 110, and the N layers of the stripe-shaped protrusions may be all disposed on the hardened layer 120, or a part of the N layers of the stripe-shaped protrusions may be disposed on the flexible substrate 110, and another part of the N layers of the stripe-shaped protrusions may be disposed on the hardened layer 120.
The application describes in detail that the strip-shaped protrusions comprise first strip-shaped protrusions and second strip-shaped protrusions.
In some examples, the first strip-shaped protrusion and the second strip-shaped protrusion are both located on the flexible substrate 110, and the first strip-shaped protrusion and the second strip-shaped protrusion may be located on two different layers of flexible substrates 110, or the first strip-shaped protrusion and the second strip-shaped protrusion may be located on two surfaces of the same layer of flexible substrate 110 that are spaced apart in a thickness direction of the display module. The first strip-shaped protrusions and the second strip-shaped protrusions have different extending directions, so that external force can be diffused to different positions of the cover plate 100 through the first strip-shaped protrusions and the second strip-shaped protrusions, and local stress on the cover plate 100 is reduced.
As shown in fig. 9 and 10, the extending direction of the first strip-shaped protrusions and the extending direction of the second strip-shaped protrusions intersect perpendicularly. First strip arch and second strip arch can disperse external force to the different positions of apron 100 more fast, in addition, because vertical angle is easier to judge, can reduce the bellied degree of difficulty that sets up of strip.
In other examples, the first stripe-shaped protrusion and the second stripe-shaped protrusion are both located on the hardened layer 120, and the first stripe-shaped protrusion and the second stripe-shaped protrusion may be located on two different hardened layers 120, or the first stripe-shaped protrusion and the second stripe-shaped protrusion may be located on two surfaces of the same hardened layer 120, which are spaced apart from each other in the thickness direction of the display module. The first strip-shaped protrusions and the second strip-shaped protrusions have different extending directions, so that external force can be diffused to different positions of the cover plate 100 through the first strip-shaped protrusions and the second strip-shaped protrusions, and local stress on the cover plate 100 is reduced.
The extending direction of the first strip-shaped bulges is vertically intersected with the extending direction of the second strip-shaped bulges. The principle is similar to that of the strip-shaped protrusions disposed on the flexible substrate 110, and the description thereof is omitted.
In other examples, the first stripe-shaped protrusion is located on the hardened layer 120, the second stripe-shaped protrusion is located on the flexible substrate 110, and the first stripe-shaped protrusion and the second stripe-shaped protrusion have different extending directions, so that the external force can be diffused to different positions of the cover plate 100 through the first stripe-shaped protrusion and the second stripe-shaped protrusion to reduce the local stress on the cover plate 100.
The extending direction of the first strip-shaped bulges is vertically intersected with the extending direction of the second strip-shaped bulges. The principle is similar to that of the strip-shaped protrusions disposed on the flexible substrate 110, and the description thereof is omitted.
In some embodiments, as shown in fig. 9, the minimum thickness of each hardened layer 120 is H1, and the minimum thickness of each hardened layer 120 may range from 2 μm to 4 μm. Specifically, the minimum thickness of each hardened layer 120 may range from 2.5 μm to 3.5 μm. For example, the minimum thickness of each hardened layer 120 may be any value of 2 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, or 2 μm to 4 μm. Therefore, the case that the hardened layer 120 is too thin, which causes the hardened layer 120 to have lower hardness and less protection effect on the cover plate 100, can be avoided; and the excessive thickness of the hardened layer 120, which results in the excessive thickness of the cover plate 100, can be avoided.
The thickness of each layer of flexible substrate 110 is H2, and the thickness of each layer of flexible substrate 110 may range from 5 μm to 15 μm. Specifically, the thickness of each layer of the flexible substrate 110 may range from 8 μm to 12 μm. For example, the thickness of each layer of the flexible substrate 110 may be any value of 5 μm, 6 μm, 8 μm, 10 μm, 12 μm, 15 μm, or 5 μm to 15 μm. Therefore, the situation that the flexible substrate 110 is too thin, so that the elastic recovery capability is poor and the flexible substrate 110 is easy to crease can be avoided; and the excessive thickness of the flexible substrate 110, which results in the excessive thickness of the cover plate 100, can be avoided.
The height of each protrusion 130 is H3, and the height of each protrusion 130 may range from 0.5 μm to 1.5 μm. Specifically, the height of each protrusion 130 may range from 0.8 μm to 1.2 μm. For example, the height of each protrusion 130 may be any value of 0.5 μm, 0.6 μm, 0.8 μm, 1.0 μm, 1.2 μm, 1.5 μm, or 0.5 μm to 1.5 μm. Therefore, the short of the protrusion 130 can be avoided, and the poor stress improvement effect can be avoided; and the excessive height of the protrusion 130, which results in the excessive thickness of the cap plate 100, can be avoided.
In the same layer of protrusions 130, the distance between every two adjacent protrusions 130 is D, and the distance between every two adjacent protrusions 130 may be 1.5 μm or less. Specifically, the distance between every two adjacent protrusions 130 may be 1.2 μm or less. For example, the distance between each adjacent two protrusions 130 may be 0 μm, 0.2 μm, 0.4 μm, 0.6 μm, 1.0 μm, 1.2 μm, 1.5 μm, or any value less than 1.5 μm. Therefore, the problem that the distance between the adjacent protrusions 130 is too long, the number of the protrusions 130 is small, and the effect of improving the stress is poor can be avoided.
It should be noted that the numerical values and numerical ranges related to the embodiments of the present application are approximate values, and there may be a certain range of errors depending on the manufacturing process, and the error may be considered as negligible by those skilled in the art.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A cover plate, comprising a flexible substrate and a hardened layer, at least part of the hardened layer being located on a surface of the flexible substrate, the flexible substrate and at least one of the hardened layer being provided with a protrusion.
2. The cover sheet according to claim 1, wherein the protrusions are located on the flexible substrate, and the protrusions are located on a surface of the flexible substrate on a side close to and/or far from the hardened layer;
preferably, the protrusion on the flexible substrate is integrally formed with the flexible substrate.
3. The cover sheet according to claim 1, wherein the protrusions are located on the hardened layer, and the protrusions are located on a surface of the hardened layer on a side closer to and/or farther from the flexible substrate;
preferably, the protrusion on the hardened layer is integrally formed with the hardened layer.
4. The decking of claim 1, wherein the flexible substrate includes a plurality of layers, the plurality of layers being arranged in a stack,
the protrusion is arranged on at least one layer of the plurality of layers of the flexible substrates;
preferably, the flexible substrate provided with the protrusion is attached to the hardened layer;
preferably, each layer of the flexible substrate is provided with the protrusion.
5. The cover sheet according to claim 4, wherein the hardened layers include a plurality of layers including a surface hardened layer located on a surface of the flexible substrate which is an outermost layer of the at least two layers of the flexible substrate.
6. The decking of claim 5, wherein the plurality of hardened layers includes an intermediate hardened layer located between two adjacent layers of the flexible substrate.
7. The cover plate according to any one of claims 1 to 6, wherein the protrusions are dot-shaped protrusions, and a plurality of the dot-shaped protrusions are arranged at intervals;
preferably, the shape of the dot-shaped protrusion is any one or more of a column shape, a hemisphere shape and a cone shape.
8. The cover plate according to claim 5 or 6, wherein the protrusions are strip-shaped protrusions, a plurality of the strip-shaped protrusions are arranged at intervals along the same direction, and each strip-shaped protrusion extends to the other end of the cover plate along one end of the cover plate;
preferably, the strip-shaped bulges are arranged on at least two layers of the multi-layer flexible substrate, and the extending directions of the strip-shaped bulges on any two layers of the flexible substrate with the strip-shaped bulges are intersected;
preferably, the extending directions of the strip-shaped bulges on any two layers of the flexible substrate with the strip-shaped bulges are vertically intersected;
and/or the strip-shaped bulges are arranged on at least two layers of the plurality of hardened layers, and the extending directions of the strip-shaped bulges on any two layers of the hardened layers with the strip-shaped bulges are intersected;
preferably, the extending directions of the strip-shaped protrusions on any two layers of the hardened layers with the strip-shaped protrusions are vertically intersected;
and/or the strip-shaped bulges are arranged on at least one layer of the plurality of layers of flexible substrates and at least one layer of the plurality of layers of hardened layers, and the extending direction of the strip-shaped bulges on any layer of the flexible substrates with the strip-shaped bulges is intersected with the extending direction of the strip-shaped bulges on any layer of the hardened layers with the strip-shaped bulges;
preferably, the extending direction of the strip-shaped protrusion on any layer of the flexible substrate with the strip-shaped protrusion is perpendicular to the extending direction of the strip-shaped protrusion on any layer of the hardened layer with the strip-shaped protrusion.
9. The cover sheet according to any one of claims 1 to 6, wherein the minimum thickness of each of said hardened layers is in the range of 2 μm to 4 μm;
and/or each layer of the flexible substrate has a thickness in the range of 5 μm to 15 μm;
and/or, each of said protrusions has a height in the range of 0.5 μm to 1.5 μm;
and/or the distance between every two adjacent projections in the same layer is less than or equal to 1.5 μm.
10. A display module, comprising a display panel and the cover plate of any one of claims 1 to 9, wherein the cover plate is located on a light-emitting surface of the display panel.
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|---|---|---|---|
| CN202111408692.XA CN113990205A (en) | 2021-11-24 | 2021-11-24 | Cover plate and display module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111408692.XA CN113990205A (en) | 2021-11-24 | 2021-11-24 | Cover plate and display module |
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| CN113990205A true CN113990205A (en) | 2022-01-28 |
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Cited By (1)
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| WO2024000639A1 (en) * | 2022-06-29 | 2024-01-04 | 武汉华星光电半导体显示技术有限公司 | Display module and display device |
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