CN115050267B - Flexible cover plate and display module - Google Patents
Flexible cover plate and display module Download PDFInfo
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- CN115050267B CN115050267B CN202210764538.4A CN202210764538A CN115050267B CN 115050267 B CN115050267 B CN 115050267B CN 202210764538 A CN202210764538 A CN 202210764538A CN 115050267 B CN115050267 B CN 115050267B
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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
- 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
- G09F9/33—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 being semiconductor devices, e.g. diodes
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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
- G09F9/33—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 being semiconductor devices, e.g. diodes
- G09F9/335—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 being semiconductor devices, e.g. diodes being organic light emitting diodes [OLED]
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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
- G09F9/35—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 being liquid crystals
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Abstract
The application provides a flexible cover plate and a display module, wherein the flexible cover plate comprises a bending area, the flexible cover plate comprises a substrate layer, the substrate layer comprises a plurality of first substrate layers, and the first substrate layers are stacked along the thickness direction of the flexible cover plate and are at least positioned in the bending area; along the thickness direction of flexible apron, flexible apron includes relative first side and second side, and the shore hardness of first base member layer near first side is greater than the shore hardness of first base member layer near the second side. The first side is the side close to the user, and the first substrate layer of the side can ensure the damage resistance of the flexible cover plate; the shore hardness of the first substrate layer close to the second side is smaller, and the bending performance and the impact resistance of the flexible cover plate can be guaranteed. Therefore, the flexible cover plate and the display module provided by the application can improve the comprehensive performance of the flexible cover plate, so that the flexible cover plate has better bending performance and damage resistance, and better protection is formed for the display module.
Description
Technical Field
The application relates to the technical field of display, in particular to a flexible cover plate and a display module.
Background
In the flexible display technology, the flexible display panel has a characteristic of being foldable or crimpable. The flexible 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 device with the flexible display panel is large in display area, and good visual experience is provided for users.
In the related art, a cover plate is disposed on a light emitting side of a display panel to protect the display panel. In order to meet the foldable or crimpable performance of the cover plate, a flexible organic material is often selected as the cover plate.
However, the performance of the cover plate still has a large improvement space.
Disclosure of Invention
In view of at least one technical problem, the embodiment of the application provides a flexible cover plate and a display module, which can improve the comprehensive performance of the flexible cover plate, so that the flexible cover plate has better bending performance and damage resistance, and better protection is formed for 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 plate, including a bending region, where the flexible cover plate includes a substrate layer, the substrate layer includes a plurality of first substrate layers, and the plurality of first substrate layers are stacked along a thickness direction of the flexible cover plate and at least located in the bending region;
along the thickness direction of flexible apron, flexible apron includes relative first side and second side, and the shore hardness of first base member layer near first side is greater than the shore hardness of first base member layer near the second side.
The flexible cover plate provided by the embodiment of the application can comprise a bending area, and the flexible cover plate positioned in the bending area can be bent. The flexible cover plate may include a base layer including a plurality of first base layers stacked in a thickness direction of the flexible cover plate and located at least in the bending region. Along the thickness direction of flexible apron, flexible apron includes relative first side and second side, and the shore hardness of first base member layer near first side is greater than the shore hardness of first base member layer near the second side. Wherein the first side may be the side facing the user and the second side may be the side facing away from the user. When a user uses the flexible cover plate, the shore hardness of the first substrate layer close to the first side is larger, namely the first substrate layer close to the user side can ensure the damage resistance of the flexible cover plate; the shore hardness of the first matrix layer close to the second side is smaller, namely the first matrix layer away from the user side can ensure the bending performance of the flexible cover plate; therefore, the flexible cover plate can simultaneously meet bending performance and impact resistance, the comprehensive performance of the flexible cover plate is good, and the display module is well protected.
In one possible embodiment, the shore hardness of the plurality of first base layers decreases gradually in the direction from the first side to the second side;
the method can be realized that the Shore hardness of the first substrate layer of the same layer is in the range of 10HD-100HD;
it can be realized that the difference value of the shore hardness of the adjacent two first substrate layers ranges from 5HD to 50HD.
Like this, the design of shore hardness gradual change makes the shore hardness difference between two adjacent layers of first base member less to can make two adjacent layers of first base member layer deformation difference that produces when buckling less, be difficult for leading to appearing peeling phenomenon, perhaps, appear stress concentration phenomenon between two adjacent layers of first base member layer.
In one possible embodiment, the method further comprises a non-inflection region to which the plurality of first substrate layers extend.
Thus, the comprehensive performance of the flexible cover plate in the non-bending area can be improved, so that the flexible cover plate in the non-bending area can simultaneously meet the bending performance and the damage resistance.
In one possible embodiment, the thickness of the first substrate layer is greater than or equal to 20 μm.
Thus, the optical interference phenomenon between the first substrate layers can be prevented, and poor display of the display panel can be avoided.
In one possible embodiment, the substrate layer further comprises a non-bending region, and the substrate layer comprises at least one second substrate layer positioned in the non-bending region, wherein the number of layers of the first substrate layer is greater than that of the second substrate layer;
it may be realized that all the second matrix layers located in the non-bending region are integral with the first matrix layer located in the bending region and close to the first side;
it is possible that the face of the flexible cover plate located in the bending zone facing the first side is flush with the face of the flexible cover plate located in the non-bending zone facing the first side;
it is achieved that the face of the flexible cover plate located in the bending zone facing the second side is flush with the face of the flexible cover plate located in the non-bending zone facing the second side.
Thus, the number of layers of the second substrate layer which is positioned on the non-bending part is smaller, and the preparation process is simpler.
In one possible embodiment, the flexible cover comprises a plurality of second substrate layers, wherein the second substrate layers are stacked along the thickness direction of the flexible cover plate, and the shore hardness of the second substrate layer near the first side is larger than that of the second substrate layer near the second side;
it is possible to realize that the shore hardness of the plurality of second matrix layers is gradually reduced along the direction from the first side to the second side.
Therefore, the design of the shore hardness gradient enables the shore hardness difference between the two adjacent second substrate layers to be smaller, so that the deformation difference generated when the two adjacent second substrate layers are subjected to external force is smaller, the stripping phenomenon between the two adjacent second substrate layers is not easy to occur, or the stress concentration phenomenon occurs.
In one possible implementation manner, the substrate further comprises an auxiliary layer, wherein the auxiliary layer is arranged between two adjacent first substrate layers;
it can be realized that the auxiliary layer comprises a flexible layer, and the Shore hardness of the flexible layer is smaller than that of the matrix layer;
it is achieved that the auxiliary layer comprises a ductile layer, the cohesion of which is greater than the cohesion of the base layer.
In this way, the auxiliary layer is located between two adjacent substrate layers to further improve the performance of the two adjacent substrate layers.
In one possible embodiment, the base layer is formed by means of a coating.
In one possible embodiment, the material of the base layer comprises silicone;
it is possible to achieve different degrees of crosslinking within the siloxane of the first substrate layer.
In addition, the preparation method of the matrix layer is simpler, new materials are not required to be developed, and the cost is lower.
A second aspect of the embodiment of the present application provides a display module, including a flexible display panel and the flexible cover plate in the first aspect, where the flexible cover plate is located on a light emitting side of the flexible display panel, and a second side of the flexible cover plate faces the flexible display panel.
The display module provided by the embodiment of the application comprises the flexible cover plate, wherein the flexible cover plate can comprise a bending area, and the flexible cover plate positioned in the bending area can be bent. The flexible cover plate may include a base layer including a plurality of first base layers stacked in a thickness direction of the flexible cover plate and located at least in the bending region. Along the thickness direction of flexible apron, flexible apron includes relative first side and second side, and the shore hardness of first base member layer near first side is greater than the shore hardness of first base member layer near the second side. Wherein the first side may be the side facing the user and the second side may be the side facing away from the user. When a user uses the flexible cover plate, the shore hardness of the first substrate layer close to the first side is larger, namely the first substrate layer close to the user side can ensure the damage resistance of the flexible cover plate; the shore hardness of the first matrix layer close to the second side is smaller, namely the first matrix layer away from the user side can ensure the bending performance of the flexible cover plate; therefore, the flexible cover plate can simultaneously meet bending performance and impact resistance, the comprehensive performance of the flexible cover plate is good, and the display module is well protected.
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 display module according to an embodiment of the present application;
FIG. 2 is a cross-sectional view of a flexible cover plate provided by an embodiment of the present application;
FIG. 3 is another cross-sectional view of a flexible cover plate provided by an embodiment of the present application;
FIG. 4 is another cross-sectional view of a flexible cover plate provided by an embodiment of the present application;
FIG. 5a is another cross-sectional view of a flexible cover plate provided by an embodiment of the present application;
FIG. 5b is another cross-sectional view of a flexible cover plate provided by an embodiment of the present application;
FIG. 6 is a schematic diagram of a structure after forming a first sub-matrix layer according to an embodiment of the present application;
FIG. 7 is a schematic diagram of a structure after forming a second sub-matrix layer according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a third sub-substrate layer according to an embodiment of the present application.
Reference numerals illustrate:
100-a display module;
100 a-inflection region;
100 b-non-inflection region;
101-a flexible cover plate;
102-a display panel;
103-an adhesive layer;
110-a substrate layer;
111-a first matrix layer;
1111-a first sub-matrix layer;
1112-a second sub-matrix layer;
1113-a third sub-matrix layer;
112-a second matrix layer;
120-auxiliary layer.
Detailed Description
In the related art, the flexible cover plate can comprise a flexible substrate, and the flexible substrate can be made of an organic material with lower hardness, so that the flexible substrate is softer, and the bending performance (such as folding or curling) of the flexible cover plate is easier to realize.
However, since the hardness of the flexible substrate is low, the mechanical strength of the flexible substrate is low, and the flexible substrate is easily damaged (e.g., scratched, etc.) in use, shortening the service lives of the flexible cover plate and the display module. In order to improve the damage resistance of the flexible cover plate, the hardness of the flexible substrate can be improved, but when the hardness of the flexible substrate is higher, the bending performance of the flexible substrate cannot be met. Accordingly, there is a need for an improved flexible cover sheet that satisfies both bending and damage resistance properties.
Based on at least one technical problem described above, an embodiment of the present application provides a flexible cover plate and a display module, where the flexible cover plate may include a bending region, and the flexible cover plate located in the bending region may be bent. The flexible cover plate may include a base layer including a plurality of first base layers stacked in a thickness direction of the flexible cover plate and located at least in the bending region. Along the thickness direction of flexible apron, flexible apron includes relative first side and second side, and the shore hardness of first base member layer near first side is greater than the shore hardness of first base member layer near the second side. Wherein the first side may be the side facing the user and the second side may be the side facing away from the user. When a user uses the flexible cover plate, the shore hardness of the first substrate layer close to the first side is larger, namely the first substrate layer close to the user side can ensure the damage resistance of the flexible cover plate; the shore hardness of the first matrix layer close to the second side is smaller, namely the first matrix layer away from the user side can ensure the bending performance of the flexible cover plate; therefore, the flexible cover plate can simultaneously meet bending performance and impact resistance, the comprehensive performance of the flexible cover plate is good, and the display module is well protected.
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 100 provided by the present application will be described with reference to fig. 1 to 8.
As shown in fig. 1, an embodiment of the present application provides a display module 100, where the display module 100 includes a display panel 102, and the display panel 102 includes a light emitting side and a backlight side disposed opposite to each other in a thickness direction. The light-emitting side is used for displaying a picture. The backlight side is the opposite side of the light emitting side along the thickness direction of the display module 100.
The display panel 102 may be an Organic Light-Emitting Diode (OLED) display panel, and a Micro Light-Emitting Diode (Micro Light Emitting Diode Micro LED or μled) display panel; or, a liquid crystal (Liquid Crystal Display, abbreviated as LCD) display panel. For example, the display panel 102 may be a flexible display panel.
The display module 100 further includes a flexible cover plate 101, where the flexible cover plate 101 is located on the light emitting side of the display panel 102, and the flexible cover plate 101 protects the display panel 102. The display panel 102 and the flexible cover 101 may be connected by an adhesive layer 103, for example, the adhesive layer 103 may be formed of optically transparent adhesive.
In some embodiments, with continued reference to fig. 1, the display module 100 may be a folded display module, and the display module 100 includes a bending region 100a and a non-bending 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. For example, the display module 100 includes one bending region 100a and two non-bending regions 100b, and the two non-bending regions 100b are connected by the bending region 100a. In this way, the display module 100 may be folded in half. Alternatively, the display module 100 includes more than two non-bending regions 100b, and each two adjacent non-bending regions 100b are connected by a bending region 100a. Thus, the display module 100 can be folded more, and the area of the display module 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.
In addition, the display module 100 may be a curled display module, and the display module 100 has a smaller accommodating volume after being curled.
The display module 100 according to the embodiment of the application includes a bending region 100a and two non-bending regions 100b.
The two non-bending regions 100b may include a first non-bending region and a second non-bending region, and the display module 100 may include a flattened state, and the display module 100 of the first non-bending region and the second non-bending region may be relatively unfolded to an open state. For example, when the display module 100 in the first non-bending region and the second non-bending region is in the open state, the two may be approximately 180 ° (a small deviation is allowed).
The display module 100 may include a folded state, and the display module 100 in the first non-bending region and the second non-bending region may be relatively folded to a closed state, and for example, when the display module 100 in the first non-bending region and the second non-bending region is in the closed state, the two may be folded (allowing a small deviation).
Of course, the display module 100 may be positioned in any state between the folded state and the unfolded state.
Note that, when the display module 100 is a folded or curled display module 100, the flexible cover 101 is also a folded or curled flexible cover 101, and the display panel 102 is also a folded or curled display panel 102.
The flexible cover 101 provided in the embodiment of the present application is described in detail below.
The embodiment of the present application provides a flexible cover plate 101, and the flexible cover plate 101 may be used for the display module 100 in the above embodiment. The flexible cover plate 101 includes a first side and a second side disposed opposite to each other in a thickness direction, wherein a side of the flexible cover plate 101 facing away from the display panel 102 is the first side, and a side of the flexible cover plate 101 facing away from the display panel 102 is the second side. The upper side of the flexible cover plate 101 shown in fig. 2 is a first side, and the lower side of the flexible cover plate 101 shown in fig. 2 is a second side.
As shown in fig. 2 and 3, the flexible cover 101 may include a base layer 110, the base layer 110 being a layer of a host material constituting the flexible cover 101. The base layer 110 may include a plurality of first base layers 111, where the plurality of first base layers 111 are stacked along the thickness direction of the flexible cover 101, and the plurality of first base layers 111 are at least located in the bending region 100a. For example, the number of layers of the first base layer 111 may be 2, 3, 4, or 5 or more.
The shore hardness of the first matrix layer 111 near the first side is greater than the shore hardness of the first matrix layer 111 near the second side, that is, the shore hardness of the first matrix layer 111 near the user use side (upper side in fig. 2) is greater, so that the mechanical strength of the first matrix layer 111 near the first side is higher, and the anti-damage performance of the flexible cover plate 101 can be ensured; the first base layer 111 far away from the first base layer 111 on the user side (lower side in fig. 2) has a smaller shore hardness, so that the bending performance of the flexible cover plate 101 can be ensured; so that the flexible cover plate 101 can satisfy both bending performance and damage resistance. In addition, the shore hardness of the first substrate layer 111 far away from the user side is smaller, and the first substrate layer is softer, so that when the flexible cover plate 101 is impacted by external force, the first substrate layer deforms greatly to buffer the external force, and the flexible cover plate 101 is better protected.
The ability of the material to resist external force pressing is hardness, and the magnitude of the value reflects the degree of hardness of the material. For example, when the measurement is performed using a shore durometer, a presser finger of the durometer is pressed against the surface of the sample, and the depth of the presser finger pressed into the sample is measured. The deeper the needle is pressed into, the lower the hardness is, and the pointer of the Shore hardness meter directly displays the hardness of the material. The larger the Shore hardness is, the stronger the damage resistance of the material is; the smaller the Shore hardness is, the softer the material is, and the better the bending performance is.
For example, the plurality of first base layers 111 may be located only at the inflection region 100a, so that the overall performance of the flexible cover 101 of the inflection region 100a may be improved such that the flexible cover 101 of the inflection region 100a satisfies both the inflection performance and the damage resistance performance.
Illustratively, the multi-layer first base layer 111 may extend from the inflection region 100a to the non-inflection region 100b, and the multi-layer first base layer 111 may extend into a portion of the non-inflection region 100b or all of the non-inflection region 100b, so that the overall performance of the flexible cover 101 of the non-inflection region 100b may be improved, such that the flexible cover 101 of the non-inflection region 100b satisfies both the inflection performance and the damage resistance performance.
In some embodiments, the shore hardness of the first substrate layers 111 may be gradually reduced along the direction from the first side to the second side, so that the shore hardness difference between the adjacent two first substrate layers 111 is smaller due to the design of the shore hardness gradient, and thus the deformation difference generated when the adjacent two first substrate layers 111 are bent is smaller, which is not easy to cause the peeling phenomenon between the adjacent two first substrate layers 111, or the stress concentration phenomenon occurs.
For example, the shore hardness of the first matrix layer 111 may range from 10HD to 100HD, so that the first matrix layer 111 with smaller shore hardness near the second side may be prepared to meet the bending performance of the flexible cover plate 101; the first base layer 111 having a greater shore hardness near the first side may also be prepared to meet the anti-damage performance of the flexible cover 101. For example, the shore hardness of first base layer 111 may be 10HD, 20HD, 30HD, 40HD, 50HD, 60HD, 70HD, 80HD, 90HD, or any value between 10HD and 100HD.
The difference value of the shore hardness of the two adjacent first substrate layers 111 may be in the range of 5HD-50HD, so that the difference value of the shore hardness of the two adjacent first substrate layers 111 is prevented from being too small, and the bending performance and the damage resistance of the flexible cover plate 101 can be considered; and the excessive difference of shore hardness between the adjacent two first substrate layers 111 can be avoided, so that the deformation difference generated when the adjacent two first substrate layers 111 are subjected to external force is small, and the peeling phenomenon or the stress concentration phenomenon between the adjacent two first substrate layers 111 is not easy to occur.
Illustratively, the thickness of the first substrate layer 111 may be greater than or equal to 20 μm, so that a difference between the thickness of the first substrate layer 111 and the wavelength of visible light may be large, an optical interference phenomenon generated between the first substrate layers 111 by light may be avoided, and thus a display effect of the display panel 102 may be ensured. For example, the thickness of the first base layer 111 may be 20 μm, 25 μm, 30 μm, 35 μm, or any thickness greater than 20 μm.
As shown in fig. 3, in an embodiment in which the first base layer 111 is located only in the inflection region 100a, the base layer 110 may include at least one second base layer 112 located in the non-inflection region 100b. The number of layers of the second base layer 112 may be 1, 2, 3, 4, or 5 or more.
For example, the second substrate layer 112 may be a plurality of layers, where the plurality of layers of the second substrate layer 112 are stacked along the thickness direction of the flexible cover plate 101, and the shore hardness of the second substrate layer 112 near the first side is greater than the shore hardness of the second substrate layer 112 near the second side, that is, the shore hardness of the second substrate layer 112 near the user side is greater, so that the anti-damage performance of the flexible cover plate 101 located in the non-bending area 100b can be ensured; the shore hardness of the second substrate layer 112 far away from the user's use side is smaller, the second substrate layer 112 is softer, when the flexible cover plate 101 of the non-bending area 100b is impacted by external force, larger deformation can be generated to buffer the external force, and the flexible cover plate 101 positioned in the non-bending area 100b is better protected. For example, along the direction from the first side to the second side, the shore hardness of the plurality of second substrate layers 112 may be gradually reduced, so that the shore hardness difference between the two adjacent second substrate layers 112 is smaller due to the design of the shore hardness gradient, and thus the deformation difference generated when the two adjacent second substrate layers 112 are subjected to the external force is smaller, which is not easy to cause the peeling phenomenon between the two adjacent second substrate layers 112, or the stress concentration phenomenon occurs.
In some embodiments, as shown in fig. 3, the number of layers of the first substrate layer 111 may be greater than the number of layers of the second substrate layer 112, and the manufacturing process of the flexible cover plate 101 of the non-bending region 100b may be simplified while satisfying the overall performance (bending performance and anti-damage performance) of the bending region 100a. For example, the number of layers of the first base layer 111 may be 1 or 2 or more than the number of layers of the second base layer 112.
For example, the second substrate layer 112 may be a single layer, and the number of layers of the second substrate layer 112 that is not bent is smaller, so that the preparation process is simpler; in addition, the overall structural strength of the second base layer 112 is high, and peeling phenomena that may occur when a plurality of second base layers 112 are provided are avoided.
As shown in fig. 4, all the second substrate layers 112 located in the non-bending region 100b are integral with the first substrate layer 111 located in the bending region 100a and near the first side. At this time, all the second substrate layers 112 located in the non-bending region 100b are single layers, and can be simultaneously prepared with the first substrate layer 111 located in the bending region 100a near the first side, so that the preparation process of the second substrate layers 112 can be simplified. In addition, the strength of the connection between the first base layer 111 of the inflection region 100a and the second base layer 112 of the non-inflection region 100b can be improved. Because the shore hardness of the first matrix layer 111 near the first side is greater, the second matrix layer 112 and the first matrix layer 111 are an integral piece, so that the shore hardness of the second matrix layer 112 is also greater, and the damage resistance of the non-bending region 100b can be better ensured.
For example, the thickness of the second substrate layer 112 may be greater than or equal to 20 μm, for example, the thickness of the second substrate layer 112 may be 20 μm, 25 μm, 30 μm, 35 μm, or any thickness greater than 20 μm. The principle is similar to that of the first base layer 111, and will not be described again.
In some embodiments, the face of the flexible cover 101 facing the first side of the inflection region 100a may be flush with the face of the flexible cover 101 facing the first side of the non-inflection region 100b. When the flexible cover plate 101 is in a flattened state, the flatness of the surface of the flexible cover plate 101 facing the user side is good, so that the display effect of the flexible cover plate 101 is good.
In addition, the face of the flexible cover plate 101 facing the second side at the inflection region 100a may be flush with the face of the flexible cover plate 101 facing the second side at the non-inflection region 100b. The surface flatness of the flexible cover plate 101 facing the display panel 102 side is good, when the flexible cover plate 101 is connected with the display panel 102, the flexible cover plate 101 is tightly attached to the display panel 102, the connection area is large, the connection strength of the flexible cover plate 101 and the display panel is high, and the connection difficulty is low.
In some embodiments, as shown in fig. 5a and 5b, the flexible cover 101 may further include an auxiliary layer 120, and an auxiliary layer 120 may be disposed between two adjacent first substrate layers 111. The auxiliary layer 120 is positioned between two adjacent first base layers 111 to further improve the performance of the two adjacent first base layers 111. The auxiliary layer 120 may be located between any two adjacent first substrate layers 111, as shown in fig. 5a, or as shown in fig. 5b, only a portion of the two adjacent first substrate layers 111 may be provided with the auxiliary layer 120 therebetween, and another portion of the two adjacent first substrate layers 111 may not be provided with the auxiliary layer 120 therebetween.
An auxiliary layer 120 may be disposed between two adjacent second substrate layers 112, and the principle is similar to that of disposing the auxiliary layer 120 between two adjacent first substrate layers 111, and will not be described again.
It should be noted that the auxiliary layer 120 located between two adjacent first substrate layers 111 and the auxiliary layer 120 located between two adjacent second substrate layers 112 may be the same layer and integrally formed. The auxiliary layer 120 located between the adjacent two first base layers 111 and the auxiliary layer 120 located between the adjacent two second base layers 112 may be different layers.
For example, the auxiliary layer 120 may include a flexible layer, where the shore hardness of the flexible layer is less than the shore hardness of all the base layers 110, and the flexible layer provides a larger buffer for the cover plate when the cover plate is impacted by external force, so that the flexible cover plate 101 has better impact resistance.
In addition, the auxiliary layer 120 may include a ductile layer having a cohesive force greater than that of the base layer 110; in this way, the toughness of the flexible cover plate 101 can be improved, so that the flexible cover plate 101 is not easy to break, and the display panel 102 can be well protected.
The cohesive force refers to the mutual attraction between adjacent parts in the same material, and the cohesive force is large, so that the toughness of the toughness layer is good, and the toughness layer is not easy to break under the action of external force.
In some embodiments, the base layer 110 may be formed by coating, and the first base layer 111 and/or the second base layer 112 may be formed by coating with silicone. For example, the degree of crosslinking inside the siloxane of the first substrate layer 111 with different hardness may be different, and a plurality of layers of the first substrate layer 111 with different hardness may be formed by coating the siloxane with different degree of crosslinking, so that no new material need to be developed, the cost is low, and the preparation method is simple. In addition, the silicone of the second substrate layer 112 with different hardness may have different cross-linking degrees, and the principle is similar to that of the first substrate layer 111, and will not be described again.
Referring to fig. 6 to 8, a method of manufacturing the flexible cover plate 101 of fig. 2 will be described. For example, the flexible cover plate 101 may include a plurality of first base layers 111, and the number of the first base layers 111 is 4, for example, in a direction from the second side to the first side, the plurality of first base layers 111 may be a first sub-base layer 1111, a second sub-base layer 1112, a third sub-base layer 1113, and a fourth sub-base layer, respectively. First, as shown in fig. 6, a first sub-base layer 1111 is formed by coating; then, as shown in fig. 7, a second sub-base layer 1112 is formed on the surface of the first sub-base layer 1111 facing away from the second side by coating; with continued reference to fig. 8, a third sub-matrix layer 1113 is formed by coating on the face of the second sub-matrix layer 1112 facing away from the second side; finally, as shown in fig. 2, a fourth sub-base layer is formed on the surface of third sub-base layer 1113 facing away from the second side by means of coating; thereby forming a flexible cover plate 101.
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 (19)
1. The flexible cover plate is characterized by comprising a bending region, wherein the flexible cover plate comprises a substrate layer, the substrate layer comprises a plurality of first substrate layers, and the first substrate layers are stacked along the thickness direction of the flexible cover plate and at least positioned in the bending region;
the flexible cover plate comprises a first side and a second side which are opposite to each other, wherein the Shore hardness of the first matrix layer close to the first side is larger than that of the first matrix layer close to the second side along the thickness direction of the flexible cover plate;
the first side is a side, facing away from the display panel, of the flexible cover plate, and the second side is a side, facing towards the display panel, of the flexible cover plate.
2. The flexible cover sheet of claim 1, wherein the plurality of layers of the first matrix layer have a progressively decreasing shore hardness in a direction from the first side to the second side.
3. The flexible cover sheet of claim 2, wherein the shore hardness of the first base layer of the same layer is in the range of 10HD to 100HD.
4. A flexible cover sheet according to claim 3, wherein adjacent two of the first substrate layers have a shore hardness difference in the range of 5HD to 50HD.
5. The flexible cover sheet of any one of claims 1-4, further comprising a non-flex region, wherein a plurality of the first substrate layers extend to the non-flex region.
6. The flexible cover sheet of any of claims 1-4, wherein the first substrate layer has a thickness greater than or equal to 20 μιη.
7. The flexible cover sheet of any of claims 1-4, wherein the base layer is formed by coating.
8. The flexible cover sheet of any one of claims 1-4, wherein the material of the base layer comprises silicone.
9. The flexible cover sheet of claim 8 wherein the silicone interior of the plurality of first substrate layers is cross-linked to a different degree.
10. The flexible cover sheet of any one of claims 1-4, further comprising a non-flex region, wherein the substrate layer comprises at least one second substrate layer positioned in the non-flex region, and wherein the number of layers of the first substrate layer is greater than the number of layers of the second substrate layer.
11. The flexible cover sheet of claim 10 wherein all of the second base layer at the non-inflection region is integral with the first base layer at the inflection region and adjacent the first side.
12. The flexible cover sheet of claim 11 wherein the face of the flexible cover sheet at the inflection region facing the first side is flush with the face of the flexible cover sheet at the non-inflection region facing the first side.
13. The flexible cover sheet of claim 12 wherein the face of the flexible cover sheet at the inflection region that faces the second side is flush with the face of the flexible cover sheet at the non-inflection region that faces the second side.
14. The flexible cover sheet according to claim 10, comprising a plurality of the second base layers stacked in a thickness direction of the flexible cover sheet, wherein a shore hardness of the second base layer near the first side is greater than a shore hardness of the second base layer near the second side.
15. The flexible cover sheet of claim 13, wherein the plurality of layers of the second matrix layer have a progressively decreasing shore hardness in a direction from the first side to the second side.
16. The flexible cover sheet of any one of claims 1-4, further comprising an auxiliary layer disposed between adjacent two of the first substrate layers.
17. The flexible cover sheet of claim 16, wherein the auxiliary layer comprises a flexible layer having a shore hardness less than a shore hardness of the base layer.
18. The flexible cover sheet of claim 17 wherein the auxiliary layer comprises a ductile layer having a cohesive force greater than the cohesive force of the base layer.
19. A display module comprising a flexible display panel and a flexible cover as claimed in any one of claims 1 to 18, wherein the flexible cover is positioned on a light exit side of the flexible display panel, and a second side of the flexible cover is oriented towards the flexible display panel.
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| CN115050267A (en) | 2022-09-13 |
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