CN114446182B - Flexible cover plate and display module - Google Patents
Flexible cover plate and display module Download PDFInfo
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- CN114446182B CN114446182B CN202210182020.XA CN202210182020A CN114446182B CN 114446182 B CN114446182 B CN 114446182B CN 202210182020 A CN202210182020 A CN 202210182020A CN 114446182 B CN114446182 B CN 114446182B
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- 238000005452 bending Methods 0.000 claims abstract description 39
- 239000000758 substrate Substances 0.000 claims description 63
- 239000000853 adhesive Substances 0.000 claims description 40
- 230000001070 adhesive effect Effects 0.000 claims description 40
- 239000000463 material Substances 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000002788 crimping Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Optics & Photonics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The application provides a flexible cover plate and a display module, wherein the flexible cover plate comprises a plurality of first parts and a plurality of second parts, the first parts are distributed at intervals along the extending direction of the flexible cover plate, the second parts are distributed at intervals along the extending direction of the flexible cover plate, and at least one second part is distributed between every two adjacent first parts; the modulus of elasticity of the first portion is greater than the modulus of elasticity of the second portion. The elastic modulus of the first part is higher, so that the damage resistance of the flexible cover plate can be ensured; the elastic modulus in the second part is lower, so that the bending performance of the flexible cover plate can be ensured. Therefore, the flexible cover plate and the display module provided by the embodiment of the application can improve the damage resistance of the flexible cover plate and prolong the service lives of the flexible cover plate and the display module.
Description
Technical Field
The application relates to the technical field of display panels, in particular to a flexible cover plate and a display module.
Background
Among flexible display technologies, flexible display panels have the advantage of being foldable or rollable. The display panel is in a folded or curled state, so that the display device with the flexible display panel is small in size and convenient to store. The flexible display panel is in a flattened state, so that the display area of the display device with the flexible display panel is large, and good visual experience is provided for users.
In the related art, in order to satisfy the foldable or rollable property, a flexible organic material is often used as a cover plate for the display panel. However, the flexible cover plate is easily damaged, shortening the service life of the flexible display panel.
Disclosure of Invention
In view of at least one technical problem described above, embodiments of the present application provide a flexible cover plate and a display module, which can improve the damage resistance of the flexible cover plate and prolong the service lives of the flexible cover plate and the display module.
In order to achieve the above object, the embodiment of the present application provides the following technical solutions:
a first aspect of an embodiment of the present application provides a flexible cover sheet, including: the first parts are distributed at intervals along the extending direction of the flexible cover plate, the second parts are distributed at intervals along the extending direction of the flexible cover plate, and at least one second part is distributed between every two adjacent first parts;
the modulus of elasticity of the first portion is greater than the modulus of elasticity of the second portion.
The flexible cover plate provided by the embodiment of the application comprises a plurality of first parts and a plurality of second parts, wherein the elastic modulus of the first parts is larger than that of the second parts. The elastic modulus of the first part is higher, so that the damage resistance of the flexible cover plate can be ensured; the elastic modulus in the second part is lower, so that the bending performance of the flexible cover plate can be ensured. The first parts are distributed at intervals along the extending direction of the flexible cover plate, the second parts are distributed at intervals along the extending direction of the flexible cover plate, and at least one second part is distributed between every two adjacent first parts, so that the first parts and the second parts are uniformly distributed at all positions of the flexible cover plate, and the bending performance and the damage resistance performance of all positions of the flexible cover plate are consistent.
In one possible implementation, the difference between the elastic modulus of the first portion and the elastic modulus of the second portion is not less than 2MPa.
In this way, the elastic modulus of the first part and the elastic modulus of the second part can be prevented from being too close, so that the flexible substrate can be provided with both bending performance and damage resistance.
In one possible implementation, the sidewall surfaces of adjacent first and second portions are in contact;
or a gap is formed between the adjacent first part and second part, a first bonding piece is filled in the gap, and the side wall surfaces of the adjacent first part and second part are connected through the first bonding piece;
it is possible to achieve that the cohesion of the first adhesive member is greater than the cohesion of the first portion and/or the second portion.
Therefore, the first part and the second part are connected in a plurality of modes, and different requirements of the flexible cover plate can be met.
In one possible implementation, the same side surfaces of the first and second portions in the thickness direction of the flexible cover plate are covered with the second adhesive.
It is possible to realize that the first adhesive part and the second adhesive part are one piece.
In this way, the second adhesive member can protect the first portion and the second portion.
In one possible implementation, the ratio of the sum of the areas of all the first portions to the sum of the areas of all the second portions per unit area of the flexible cover plate ranges from 0.4 to 0.6;
it is achieved that the thickness of the first and second portions is equal.
Therefore, the difference between the sum of the areas of all the first parts and the sum of the areas of all the second parts in the unit area can be avoided to be larger, the sum of the areas of all the first parts and the sum of the areas of all the second parts are relatively close, the first parts and the second parts are distributed uniformly on the flexible cover plate, and the uniformity of the bending performance and the damage resistance performance of the flexible cover plate can be ensured.
In one possible implementation, the flexible cover panel is a folded cover panel, the flexible cover panel including a folded region and a non-folded region;
in the bending region, the ratio of the sum of the areas of all the first parts to the sum of the areas of all the second parts in the unit area of the flexible cover plate is a first numerical value;
in the non-bending region, the ratio of the sum of the areas of all the first portions to the sum of the areas of all the second portions in the unit area of the flexible cover plate is a second value;
the first value is less than the second value.
Thus, the bending performance of the flexible cover plate in the bending area is better, and the damage resistance of the flexible cover plate in the non-bending area is better.
In one possible implementation manner, the flexible cover plate is a curled cover plate, and the flexible cover plate comprises a plurality of first areas and a plurality of second areas along the curling direction of the flexible cover plate, and at least one second area is distributed between every two adjacent first areas;
each first region and each second region are respectively distributed with a plurality of first parts and a plurality of second parts; in the first region, the ratio of the sum of the areas of all the first portions to the sum of the areas of all the second portions in the unit area of the flexible cover plate is a third value; in the second region, the ratio of the sum of the areas of all the first portions to the sum of the areas of all the second portions in the unit area of the flexible cover plate is a fourth value; the third value is greater than the fourth value;
or, the first portion is located in the first zone and the second portion is located in the second zone;
it is achieved that the extension of the first region is smaller than the extension of the second region in the crimping direction of the flexible cover plate.
In this way, the flexible cover plate is easier to curl along the curling direction of the flexible cover plate.
In one possible implementation, the first and second portions on the same layer together form a layer of flexible substrate;
the flexible cover plate comprises a plurality of layers of flexible substrates which are arranged in a stacked manner, and two adjacent layers of flexible substrates comprise a first flexible substrate and a second flexible substrate; an orthographic projection of a first portion of the first flexible substrate onto the second flexible substrate at least partially coincides with a second portion of the second flexible substrate.
Thus, the flexible cover plate can better have both damage resistance and bending performance.
In one possible implementation, the surface of the flexible cover plate is provided with a stiffening layer.
In this way, the stiffening layer can protect the flexible substrate.
A second aspect of the embodiment of the present application provides a display module, including a display panel and the flexible cover plate in the first aspect, where the flexible cover plate is located on a light emitting surface of the display panel.
The display module provided by the embodiment of the application comprises a flexible cover plate, wherein the flexible cover plate comprises a plurality of first parts and a plurality of second parts, and the elastic modulus of the first parts is larger than that of the second parts. The elastic modulus of the first part is higher, so that the damage resistance of the flexible cover plate can be ensured; the elastic modulus in the second part is lower, so that the bending performance of the flexible cover plate can be ensured. The first portions are distributed at intervals along the extending direction of the flexible cover plate, the second portions are distributed at intervals along the extending direction of the flexible cover plate, and at least one second portion is distributed between every two adjacent first portions, so that the first portions and the second portions are distributed at all positions of the flexible cover plate, and the bending performance and the damage resistance performance of all positions of the flexible cover plate are consistent.
The construction of the present application and other objects and advantages thereof will be more readily understood from the description of the preferred embodiment 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 that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a flexible cover plate according to an embodiment of the present application;
FIG. 2 is a cross-sectional view of another flexible cover plate provided in an embodiment of the present application;
FIG. 3 is a cross-sectional view of another flexible cover plate provided in an embodiment of the present application;
FIG. 4 is a cross-sectional view of another flexible cover plate provided in an embodiment of the present application;
FIG. 5 is a top view of a folding cover plate provided by an embodiment of the present application;
FIG. 6 is a top view of a crimped cap plate provided by an embodiment of the present application;
FIG. 7 is a cross-sectional view of another flexible cover plate provided in an embodiment of the present application;
FIG. 8 is a schematic view of a structure for forming a first portion according to an embodiment of the present application;
FIG. 9 is a schematic view of a structure for forming a second portion according to an embodiment of the present application;
FIG. 10 is a schematic view of a structure for forming a first adhesive member according to an embodiment of the present application;
fig. 11 is a schematic structural diagram of forming a hardened layer according to an embodiment of the present application.
Reference numerals illustrate:
100-flexible cover plate;
110-a flexible substrate;
111-a first part;
112-a second part;
113-a first adhesive;
114-a second adhesive;
120-hardening layer;
100 a-inflection region;
100 b-non-inflection region;
100 c-first zone;
100 d-second zone;
200-coating base station.
Detailed Description
In the related art, the flexible cover plate may include a flexible substrate, and if the flexible substrate is formed by using a material with a relatively high elastic modulus, bending performance (including folding or curling performance) of the flexible substrate may be affected. Therefore, the flexible substrate can be made of a material with a lower elastic modulus, so that the flexible substrate is softer and the bending performance of the flexible cover plate is easier to realize.
However, since the elastic modulus of the flexible substrate is low, the rigidity of the flexible substrate is low, so that the mechanical strength of the flexible substrate is low, the flexible substrate is easy to damage in use, and the service lives of the flexible cover plate and the display module are shortened.
Based on the above-mentioned problems, an embodiment of the present application provides a flexible cover plate and a display module, where the flexible cover plate includes a plurality of first portions and a plurality of second portions, and an elastic modulus of the first portions is greater than an elastic modulus of the second portions. The elastic modulus of the first part is higher, so that the damage resistance of the flexible cover plate can be ensured; the elastic modulus in the second part is lower, so that the bending performance of the flexible cover plate can be ensured. The first portions are distributed at intervals along the extending direction of the flexible cover plate, the second portions are distributed at intervals along the extending direction of the flexible cover plate, and at least one second portion is distributed between every two adjacent first portions, so that the first portions and the second portions are distributed at all positions of the flexible cover plate, and the bending performance and the damage resistance performance of all positions of the flexible cover plate are consistent.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The display module provided by the application will be described with reference to fig. 1 to 11.
The embodiment of the application provides a display module, which comprises a display panel, wherein the display panel comprises a light emitting surface and a backlight surface. The light-emitting surface is used for displaying pictures, and the backlight surface is the other surface which is opposite to 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 Light Emitting Diode LED or μled) display panel.
The display module further comprises a flexible cover plate 100, the flexible cover plate 100 is located on the light emitting surface of the display panel, and the flexible cover plate 100 plays a role in protecting the display panel.
The flexible cover plate 100 provided in the embodiment of the present application is described in detail below.
As shown in fig. 1, an embodiment of the present application provides a flexible cover plate 100, and the flexible cover plate 100 may be used for the display module in the above embodiment. The flexible cover plate 100 may include a flexible substrate 110, the flexible substrate 110 including a plurality of first portions 111 and a plurality of second portions 112, the modulus of elasticity of the first portions 111 being different from the modulus of elasticity of the second portions 112. Wherein the modulus of elasticity of the first portion 111 may be greater than or less than the modulus of elasticity of the second portion 112. The elastic modulus of one of the first portion 111 and the second portion 112 is high, and the damage resistance of the flexible substrate 110 can be ensured. The other of the first portion 111 and the second portion 112 has a lower elastic modulus, and can ensure bending performance of the flexible substrate 110, so that the flexible substrate 110 combines both the damage resistance performance and the bending performance.
It should be noted that: the elastic modulus is an index for measuring the difficulty of elastic deformation of the material, and the larger the value is, the larger the stress for causing the material to generate certain elastic deformation is, namely the larger the rigidity of the material is.
The plurality of first portions 111 are spaced apart along the extending direction of the flexible cover plate 100, and the plurality of first portions 111 are distributed at respective positions of the flexible cover plate 100; the plurality of second portions 112 are distributed at intervals along the extending direction of the flexible cover plate 100, the plurality of second portions 112 are distributed at each position of the flexible cover plate 100, and at least one second portion 112 is distributed between every two adjacent first portions 111, so that the anti-damage performance and the bending performance of each position of the flexible cover plate 100 are relatively consistent.
The number of second portions 112 distributed between each adjacent two of the first portions 111 may be 1, 2, 3 or more than 3.
The embodiment of the present application will be described by taking the example that the elastic modulus of the first portion 111 is greater than that of the second portion 112.
Specifically, the elastic modulus of the first portion 111 is greater than that of the second portion 112, the first portion 111 can ensure the anti-damage performance of the flexible substrate 110, and the second portion 112 can ensure the bending performance of the flexible substrate 110.
The thicknesses of the first portion 111 and the second portion 112 may be equal, so that the structure of the flexible substrate 110 is simpler and the manufacturing difficulty is lower. Illustratively, the surfaces of the same sides of the first and second portions 111 and 112 in the thickness direction may be flush, i.e., the surfaces of the first and second portions 111 and 112 facing the display panel side may be flush, and the surfaces of the first and second portions 111 and 112 facing away from the display panel side may be flush. So that the flatness of the surface on the same side in the thickness direction of the flexible substrate 110 is good.
For example, the material of the flexible substrate 110 may be Polyimide (PI) or polyethylene terephthalate (Polyethylene terephthalate, PET) or the like. Wherein the materials of the first portion 111 and the second portion 112 may be the same or different. When the material of the first portion 111 and the second portion 112 is the same, the material may be modified for forming the first portion 111 and the second portion 112 with different elastic moduli.
In some embodiments, the difference between the elastic modulus of the first portion 111 and the elastic modulus of the second portion 112 may be in a range of greater than or equal to 2MPa. Specifically, the difference between the elastic modulus of the first portion 111 and the elastic modulus of the second portion 112 may be in the range of 3MPa or more. For example, the difference between the elastic modulus of the first portion 111 and the elastic modulus of the second portion 112 may be any value of 2MPa, 2.5MPa, 3MPa, 3.5MPa, 4MPa, or 2MPa or more. Thus, the elastic modulus of the first portion 111 and the elastic modulus of the second portion 112 can be prevented from being too close, so that the flexible substrate 110 can achieve both bending performance and damage resistance.
In some embodiments, the ratio of the sum of the areas of all first portions 111 to the sum of the areas of all second portions 112 per unit area of the flexible cover 100 may range from 0.4 to 0.6. Specifically, the ratio of the sum of the areas of all the first portions 111 to the sum of the areas of all the second portions 112 per unit area of the flexible cover plate 100 may be in the range of 0.45 to 0.55. For example, the ratio may be any value between 0.4, 0.45, 0.5, 0.55, 0.6, or 0.4-0.6. Therefore, the difference between the sum of the areas of all the first parts 111 and the sum of the areas of all the second parts 112 in a unit area can be avoided to be larger, so that the sum of the areas of all the first parts 111 and the sum of the areas of all the second parts 112 are relatively close, the first parts 111 and the second parts 112 are distributed uniformly on the flexible cover plate 100, and the uniformity of the bending performance and the damage resistance performance of the flexible cover plate 100 can be ensured.
In some embodiments, as shown in fig. 1, the sidewall surfaces of adjacent first and second portions 111, 112 may be directly connected to each other. At this time, the side wall surfaces of the adjacent first portion 111 and second portion 112 are in direct contact with each other without a gap, and the side wall surfaces of the adjacent first portion 111 and second portion 112 are connected by the adhesive force of the material itself. Thus, the flexible substrate 110 is simpler in structure and less difficult to manufacture.
In some embodiments, as shown in fig. 2, a gap may be formed between the adjacent first and second portions 111 and 112, and the gap is filled with the first adhesive member 113, and the sidewall surfaces of the adjacent first and second portions 111 and 112 are connected by the first adhesive member 113.
Illustratively, the adhesive force between the first adhesive member 113 and the first and second portions 111 and 112 may be greater than or equal to the adhesive force of the material itself between the first and second portions 111 and 112, so that the first and second portions 111 and 112 may be better connected, and the connection stability between the first and second portions 111 and 112 may be improved.
Illustratively, the cohesive force of the first adhesive member 113 may be greater than the cohesive force of the first portion 111, and the cohesive force of the first adhesive member 113 may also be greater than the cohesive force of the second portion 112. In this way, the toughness of the flexible substrate 110 can be improved, so that the flexible substrate 110 is not easy to break, and the display panel can be well protected. Wherein the surfaces of the same side of the first adhesive member 113, the first portion 111, and the second portion 112 in the thickness direction may be flush, so that the flatness of the side surfaces is good.
The cohesive force refers to the attractive force between adjacent parts inside the same material, and the cohesive force is large, so that the toughness of the first adhesive member 113 is good, and the first adhesive member 113 is not easy to break under the action of external force.
In some embodiments, as shown in fig. 3 and 4, the same side surfaces of the first and second parts 111 and 112 in the thickness direction of the flexible cover plate 100 may be covered with the second adhesive 114. The second adhesive 114 may cover surfaces of the first and second parts 111 and 112 facing the display panel side, and the second adhesive 114 may also cover surfaces of the first and second parts 111 and 112 facing the display panel side. In this way, the second adhesive 114 can protect the first portion 111 and the second portion 112, further improve the toughness of the flexible cover 100, and protect the display panel better.
Illustratively, the cohesive force of the second adhesive 114 may be greater than the cohesive force of the first portion 111, and the cohesive force of the second adhesive 114 may also be greater than the cohesive force of the second portion 112. The principle is similar to that of the first adhesive member 113, and will not be described again.
For example, the first adhesive member 113 and the second adhesive member 114 may be an integral member, that is, the first adhesive member 113 and the second adhesive member 114 may be integrally formed, so that the difficulty in manufacturing the first adhesive member 113 and the second adhesive member 114 is low, and in addition, the connection strength between the first adhesive member 113 and the second adhesive member 114 is high.
In some embodiments, as shown in fig. 5, the flexible cover sheet 100 is a folded cover sheet, and the flexible cover sheet 100 includes a folded region 100a and a non-folded region 100b. The number of the non-bending regions 100b is at least two, and one bending region 100a is disposed between every two adjacent non-bending regions 100b.
In some examples, the flexible cover 100 includes one inflection region 100a and two non-inflection regions 100b, the two non-inflection regions 100b being connected by the inflection region 100a. In this way, the flexible cover plate 100 may be doubled over. In other examples, the flexible cover 100 includes more than two non-inflection regions 100b, each adjacent two of the non-inflection regions 100b being connected by one inflection region 100a. In this way, the flexible cover 100 can be multi-folded, and the area of the flexible cover 100 after folding is smaller. The number of non-inflection zones 100b and inflection zones 100a is not limited in embodiments of the present application to provide more options for the user.
It will be appreciated that the greater the ratio of the sum of the areas of all the first portions 111 to the sum of the areas of all the second portions 112 per unit area, the higher the mechanical strength of the flexible substrate 110 per unit area, and the greater the damage resistance. The smaller the ratio of the sum of the areas of all the first portions 111 to the sum of the areas of all the second portions 112 per unit area, the better the bending performance of the flexible substrate 110 per unit area.
Wherein, in the bending region 100a, the ratio of the sum of the areas of all the first portions 111 to the sum of the areas of all the second portions 112 in the unit area of the flexible cover plate 100 is a first value; in the non-bending region 100b, the ratio of the sum of the areas of all the first portions 111 to the sum of the areas of all the second portions 112 per unit area of the flexible cover plate 100 is a second value; the first value is less than the second value. Thus, the flex substrate 110 of flex region 100a has better flex performance than the flex substrate 110 of flex region 100b.
In some embodiments, as shown in fig. 6, the flexible cover 100 may be a crimped cover, with the arrows in fig. 6 showing the crimping direction of the flexible cover 100. Along the curling direction of the flexible cover plate 100, the flexible cover plate 100 comprises a plurality of first areas 100c and a plurality of second areas 100d, wherein at least one second area 100d is distributed between every two adjacent first areas 100 c. The extension lengths of the first and second regions 100c and 100d in the crimping direction are short, and the bending performance of the flexible cover plate 100 can be further improved by properly setting the extension lengths of the first and second regions 100c and 100d in the crimping direction.
In some examples, the first portions 111 and the second portions 112 are distributed in each of the first regions 100c and each of the second regions 100d, so that both the bending performance and the damage resistance performance of the first regions 100c and the second regions 100d can be achieved.
In the first region 100c, the ratio of the sum of the areas of all the first portions 111 to the sum of the areas of all the second portions 112 per unit area of the flexible cover plate 100 is a third value; in the second region 100d, the ratio of the sum of the areas of all the first portions 111 to the sum of the areas of all the second portions 112 per unit area of the flexible cover plate 100 is a fourth value; the third value is greater than the fourth value. In this way, the flexible substrate 110 in the first region 100c has better anti-damage performance, and the flexible substrate 110 in the second region 100d has better bending performance, so that both bending performance and anti-damage performance can be better achieved.
In other examples, the first portion 111 is located in the first region 100c and the second portion 112 is located in the second region 100d. Wherein the first region 100c is provided with the first portion 111, and the second portion 112 is not provided, so that the damage resistance of the first region 100c can be further improved; the second region 100d is provided with the second portion 112 without providing the first portion 111, and bending performance of the second region 100d can be further improved. At this time, the structure of the flexible substrate 110 is simpler and the difficulty of preparation is lower.
It is possible to realize that the extension length of the first region 100c is smaller than the extension length of the second region 100d in the curling direction of the flexible cover plate 100. The second region 100d has a longer extension length, and the flexible substrate 110 of the second region 100d has better bending performance, so that the bending performance (i.e., curling performance) of the flexible cover plate 100 can be better improved.
It is possible to realize that the extension length of the first region 100c is equal to the extension length of the second region 100d along the curling direction of the flexible cover plate 100, and the flexible substrate 110 has a simpler structure and lower manufacturing difficulty.
In some embodiments, as shown in fig. 7, the flexible substrate 110 may be a plurality of layers, and the plurality of layers of the flexible substrate 110 are stacked in a thickness direction of the flexible cover plate 100. Wherein, the adjacent two layers of flexible substrates 110 include a first flexible substrate and a second flexible substrate; the orthographic projection of the first portion 111 of the first flexible substrate onto the second flexible substrate at least partially coincides with the second portion 112 of the second flexible substrate. For example, a second portion 112 is disposed between adjacent first portions 111 along the thickness direction, and a first portion 111 is disposed between adjacent second portions 112, where the first portions 111 and the second portions 112 are staggered along the thickness direction, so that the flexible cover plate 100 can have both bending performance and anti-damage performance.
With continued reference to fig. 7, the surface of the flexible cover plate 100 may be provided with a stiffening layer 120.
Specifically, the hardened layer 120 has a high hardness and good anti-damage performance. The hardened layer 120 may be located on a side of all the flexible substrates 110 facing away from the display panel to protect the flexible substrates 110 when used by a user, thereby protecting the display module. The hardened layer 120 may also be located at a side of the flexible substrate 110 extending in the thickness direction, thereby protecting the side of the flexible substrate 110. The material of the hardened layer may be polymethyl methacrylate (polymethyl methacrylate, abbreviated as PMMA).
The following describes a process flow of preparing the flexible cover plate 100 shown in fig. 2.
As shown in fig. 8, first, a first portion 111 is formed on a coating base 200; as shown in fig. 9, a second portion 112 is formed between every adjacent two of the first portions 111; as shown in fig. 10, a first adhesive 113 is formed between the adjacent first portion 111 and second portion 112; as shown in fig. 11, a hardened layer 120 is formed on the sides of the first portion 111, the second portion 112, and the first adhesive 113 facing away from the coating base 200. Thus, the manufacturing method of the flexible cover plate 100 is simple and the operability is high.
It should be noted that, the numerical values and the numerical ranges related to the embodiments of the present application are approximate values, and may have a certain range of errors under the influence of the manufacturing process, and those errors may be considered to be negligible by those skilled in the art.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.
Claims (11)
1. A flexible cover sheet, comprising: the first parts are distributed at intervals along the extending direction of the flexible cover plate, the second parts are distributed at intervals along the extending direction of the flexible cover plate, and at least one second part is distributed between every two adjacent first parts;
the modulus of elasticity of the first portion is greater than the modulus of elasticity of the second portion;
a gap is formed between the adjacent first part and second part, a first bonding piece is filled in the gap, and the side wall surfaces of the adjacent first part and second part are connected through the first bonding piece;
the same side surface of the first part and the second part along the thickness direction of the flexible cover plate is covered with a second adhesive piece;
the first adhesive member and the second adhesive member are an integral piece.
2. The flexible cover sheet of claim 1, wherein the difference between the modulus of elasticity of the first portion and the modulus of elasticity of the second portion is in the range of not less than 2MPa.
3. The flexible cover sheet of claim 1, wherein the cohesion of the first adhesive member is greater than the cohesion of the first portion and/or the second portion.
4. A flexible cover sheet according to any one of claims 1 to 3, wherein the ratio of the sum of the areas of all the first portions to the sum of the areas of all the second portions per unit area of the flexible cover sheet is in the range of 0.4 to 0.6.
5. The flexible cover sheet of claim 4 wherein the first and second portions are of equal thickness.
6. A flexible cover sheet according to any one of claims 1 to 3, wherein the flexible cover sheet is a folded cover sheet comprising a folded region and a non-folded region;
in the bending region, the ratio of the sum of the areas of all the first portions to the sum of the areas of all the second portions in the unit area of the flexible cover plate is a first value;
in the non-bending region, a ratio of a sum of areas of all the first portions to a sum of areas of all the second portions in a unit area of the flexible cover plate is a second value;
the first value is less than the second value.
7. A flexible cover sheet according to any one of claims 1-3, wherein the flexible cover sheet is a curled cover sheet, and the flexible cover sheet comprises a plurality of first areas and a plurality of second areas along the curling direction of the flexible cover sheet, wherein at least one second area is distributed between every two adjacent first areas;
a plurality of first portions and a plurality of second portions are distributed in each of the first regions and each of the second regions; in the first region, a ratio of a sum of areas of all the first portions to a sum of areas of all the second portions in a unit area of the flexible cover plate is a third value; in the second region, a ratio of a sum of areas of all the first portions to a sum of areas of all the second portions in a unit area of the flexible cover plate is a fourth value; the third value is greater than the fourth value;
alternatively, the first portion is located in the first zone and the second portion is located in the second zone.
8. The flexible cover sheet of claim 7 wherein the first region has an extension that is less than an extension of the second region in a curl direction of the flexible cover sheet.
9. A flexible cover sheet according to any one of claims 1 to 3, wherein the first and second portions on the same layer together form a layer of flexible substrate;
the flexible cover plate comprises a plurality of layers of flexible substrates which are arranged in a stacked manner, and two adjacent layers of flexible substrates comprise a first flexible substrate and a second flexible substrate; an orthographic projection of the first portion of the first flexible substrate onto the second flexible substrate at least partially coincides with the second portion of the second flexible substrate.
10. A flexible cover sheet according to any one of claims 1-3, wherein the surface of the flexible cover sheet is provided with a hardened layer.
11. A display module comprising a display panel and the flexible cover plate of any one of claims 1-10, wherein the flexible cover plate is located on the light-emitting surface of the display panel.
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| CN202210182020.XA CN114446182B (en) | 2022-02-25 | 2022-02-25 | Flexible cover plate and display module |
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| CN115050263B (en) * | 2022-06-15 | 2023-10-27 | 昆山国显光电有限公司 | Flexible cover plate, display panel and display device |
| CN115171538B (en) * | 2022-07-29 | 2023-10-13 | 合肥维信诺科技有限公司 | Cover plate manufacturing method, cover plate and display device |
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| CN114446182A (en) | 2022-05-06 |
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