CN109411622B - Flexible display panel and flexible display device - Google Patents
Flexible display panel and flexible display device Download PDFInfo
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- CN109411622B CN109411622B CN201811151680.1A CN201811151680A CN109411622B CN 109411622 B CN109411622 B CN 109411622B CN 201811151680 A CN201811151680 A CN 201811151680A CN 109411622 B CN109411622 B CN 109411622B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
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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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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/844—Encapsulations
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Abstract
The invention provides a flexible display panel and a flexible display device, wherein the flexible display panel comprises an array substrate, a plurality of light-emitting units and a thin film packaging layer covering the plurality of light-emitting units; at least one groove is arranged between every two adjacent light-emitting units along the direction vertical to the array substrate, and at least part of the side surface of each groove is overlapped with the side surface of each light-emitting unit; at least one first protruding part is arranged on the side surface of the light emitting unit, which is overlapped with the side surface of the groove; the groove is filled with an insulating connecting piece, two ends of the insulating connecting piece are respectively connected with the array substrate and the thin film packaging layer, and a first concave part embedded with the first convex part is formed in the insulating connecting piece. By adopting the scheme, the bonding force between the functional film layers in the flexible display panel is improved, and the situation that the functional film layers of the flexible display panel are peeled off or separated in the bending process is reduced or avoided.
Description
Technical Field
The invention relates to the technical field of display, in particular to a flexible display panel and a flexible display device.
Background
Organic Light Emitting Diodes (OLEDs) are used as a current type Light Emitting device, and have many characteristics such as self-luminescence, fast response, wide viewing angle, and capability of being fabricated on a flexible substrate, and are increasingly applied to high performance display fields, such as flexible display panels.
The conventional flexible display panel generally comprises an array substrate, wherein the array substrate is provided with a plurality of light-emitting units and a thin film packaging layer covering the plurality of light-emitting units, however, after the flexible display panel is bent for many times, peeling or separation phenomena easily occur between two adjacent functional film layers in the flexible display panel, and the normal use of the flexible display panel is influenced.
Disclosure of Invention
The embodiment of the invention provides a flexible display panel and a flexible display device, which are used for solving the problem that two adjacent functional film layers in the conventional flexible display panel and the conventional flexible display device are easy to peel or separate.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
in one aspect, an embodiment of the present invention provides a flexible display panel, including: the array substrate, set up multiple luminescent units on the said array substrate, and cover the thin-film packaging layer of the said multiple luminescent units;
at least one groove is arranged between two adjacent light-emitting units along the direction vertical to the array substrate, and at least part of the side surface of the groove is overlapped with the side surface of the light-emitting unit; the side surface of the light-emitting unit, which is overlapped with the side surface of the groove, is provided with at least one first protruding part;
and the groove is filled with an insulating connecting piece, two ends of the insulating connecting piece are respectively connected with the array substrate and the thin film packaging layer, and the insulating connecting piece is provided with a first concave part embedded with the first convex part.
Compared with the prior art, the flexible display panel provided by the embodiment of the invention has the following advantages:
in the flexible display panel provided by the embodiment of the invention, the grooves are formed among the light-emitting units, the insulating connecting pieces are filled in the grooves, and the two ends of each insulating connecting piece are respectively connected with the array substrate and the thin film packaging layer, so that the array substrate, the light-emitting units and the thin film packaging layers are not only mutually attached through van der waals force, but also connected through the insulating connecting pieces, thereby improving the bonding force among the functional film layers in the flexible display panel and reducing or avoiding the situation that the functional film layers of the flexible display panel are peeled or separated in the bending process.
In addition, since the side surface of the light emitting unit coincides with the side surface of the groove, and the side surface of the light emitting unit is provided with the first protrusion, therefore, when the groove is filled with insulating material to form the insulating connecting piece, a first concave part embedded with the first convex part is formed inside the insulating connecting piece, by adopting the design, the contact area between the insulating connecting piece and the side surface of each functional film layer of the light-emitting unit is increased, the binding force between the functional film layers of the light-emitting unit is improved, in addition, the first bulge part and the first groove part which are mutually embedded are utilized to generate the biting force between each functional film layer of the light-emitting unit and the insulating connecting piece, thereby further improving the binding force between each functional film layer of the light-emitting unit, and then reduce or avoid appearing peeling off or the condition of separation between each functional film layer of luminous element in the process of buckling, improved flexible display panel's life.
As an improvement of the flexible display panel of the present invention, each of the light emitting units includes a plurality of first functional film layers stacked on the array substrate;
the first bulge is formed on the side face of at least one first functional film layer.
In the flexible display panel, the plurality of first functional film layers are an anode layer, a hole injection layer, a hole transport layer, a pixel layer, an electron transport layer, an electron injection layer and a cathode layer; or
A cathode layer, an electron injection layer, an electron transport layer, a pixel layer, a hole transport layer, a hole injection layer, and an anode layer.
As a further improvement of the flexible display panel of the present invention, there are a plurality of first protruding portions on each of the light emitting units, and the plurality of first protruding portions are arranged at intervals along a direction perpendicular to the array substrate.
As an improvement of the flexible display panel of the present invention, two opposite side surfaces of the groove are respectively overlapped with side surfaces of two adjacent light emitting units of the groove, and the insulating connecting member is a light-tight insulating connecting member.
As another improvement of the flexible display panel of the present invention, a part of the side surface of the groove coincides with the side surface of the light emitting unit located around the groove, and the insulating connector is an opaque insulating connector.
As an improvement of the flexible display panel of the invention, the number of the grooves is multiple, the multiple grooves are distributed in an array shape, and one groove is respectively arranged between every two adjacent light-emitting units.
As a further improvement of the flexible display panel, the array substrate comprises a substrate base plate and at least one second functional film layer stacked on the substrate base plate, wherein the at least one second functional film layer comprises a buffer layer, a gate insulating layer, an active layer, an interlayer insulating layer, a source drain layer and a flat layer;
the groove extends to the substrate base plate, and a second sunken part which is sunken into the at least one second functional film layer is arranged on the side surface of the groove;
the insulating connecting piece extends to the substrate base plate, and the insulating connecting piece is provided with a second protruding part embedded with the second recessed part.
As a further improvement of the flexible display panel of the present invention, the thin film encapsulation layer includes a plurality of encapsulation units arranged in a stack;
the groove extends upwards and penetrates through the film packaging layer, and a third sunken part which is recessed into at least one packaging unit is arranged on the side surface of the groove;
the insulating connecting piece extends upwards and penetrates through the film packaging layer, and the insulating connecting piece is provided with a third protruding portion embedded with the third recessed portion.
On the other hand, the embodiment of the present invention further provides a flexible display device, where the flexible display device includes the flexible display panel described above, and therefore the flexible display device provided in the embodiment of the present invention has the advantages of the flexible display panel, and details are not described herein again.
In addition to the technical problems, technical features constituting technical solutions, and advantageous effects brought by the technical features of the technical solutions described above, other technical problems, technical features included in the technical solutions, and advantageous effects brought by the technical features that can be solved by the flexible display panel and the flexible display device provided by the embodiments of the present invention will be further described in detail in the detailed description.
Drawings
In order to illustrate embodiments of the invention or prior art solutions more clearly, the drawings that are needed in the description of the embodiments of the invention or prior art will be briefly described below, it being understood that the drawings in the following description are only some embodiments of the invention, and that these drawings and the written description are not intended to limit the scope of the disclosed concept in any way, but rather to illustrate it to those skilled in the art by reference to specific embodiments, and that other drawings may be obtained by those skilled in the art without inventive effort.
Fig. 1 is a schematic structural diagram of a flexible display panel according to a first embodiment of the present invention;
FIG. 2 is a first schematic structural diagram of a flexible display panel without an insulating connection member according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of the flexible display panel of FIG. 2 after the insulating connection members are filled;
FIG. 4 is a first top view of a flexible display panel with a thin film encapsulation layer removed according to a first embodiment of the present invention;
fig. 5 is a second top view of the flexible display panel with the thin film encapsulation layer removed according to the first embodiment of the present invention;
fig. 6 is a third top view of the flexible display panel with the thin film encapsulation layer removed according to the first embodiment of the present invention;
FIG. 7 is a second schematic structural diagram of a flexible display panel without an insulating connection member according to a first embodiment of the present invention;
FIG. 8 is a schematic structural diagram of the flexible display panel of FIG. 7 after filling the insulating connectors;
FIG. 9 is a third schematic view illustrating a structure of a flexible display panel without an insulating connection member according to an embodiment of the present invention;
FIG. 10 is a fourth schematic view illustrating a flexible display panel without insulating connection members according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of an array substrate according to an embodiment of the invention.
Description of reference numerals:
10-an array substrate; 11-a substrate base plate;
12-a buffer layer; 13-a gate layer;
14-a gate insulating layer; 15-an active layer;
16-an interlayer insulating layer; 17-a source drain layer;
18-a planar layer; 20-a pixel defining layer;
30-a light emitting unit; 31-an anode layer;
32-hole injection layer; 33-a hole transport layer;
34-an electron blocking layer; 35-a pixel layer;
36-a hole blocking layer; 37-electron transport layer;
38-electron injection layer; 39-a cathode layer;
40-grooves; 50-an insulated connector;
61-a first boss; 62-a first recess;
63-a second boss; 64-a second recess;
65-a third boss; 66-a third recess;
70-a thin film encapsulation layer; 71-packaging unit.
Detailed Description
In the flexible display panel, due to differences of physical ductility, elasticity and internal stress characteristics among functional film layers such as a film packaging layer, a light-emitting unit and an array substrate, the phenomenon that adjacent functional film layers are peeled off easily occurs after the flexible display panel is bent for many times, and normal use of the flexible display panel is affected.
In view of the above-mentioned drawbacks, embodiments of the present invention provide an improved technical solution, in which a groove between two adjacent light emitting units and an insulating connection member filled in the groove are provided, and two ends of the insulating connection member are respectively connected to the thin film encapsulation layer and the array substrate, and the insulating connection member can enhance the bonding force among the thin film encapsulation layer, the light emitting units, and the array substrate in the flexible display panel; in addition, partial side of the groove coincides with the side of the light-emitting unit, the side of the light-emitting unit coinciding with the side of the groove is provided with a first protruding part, the insulating connecting piece filled in the groove is embedded with the first protruding part, and the first protruding part is connected with the first recessed part in an embedded mode, so that the first functional film layers of the light-emitting unit and the insulating connecting piece generate an occlusion force, the connecting force between the first functional film layers of the light-emitting unit is improved, the problem that the first functional film layers of the light-emitting unit are peeled off or separated in the bending process is further reduced or avoided, and the service life of the flexible display panel is prolonged.
In order to make the aforementioned objects, features and advantages of the embodiments of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and 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 invention.
As shown in fig. 1, 2 and 3, the flexible display panel according to the embodiment of the invention includes an array substrate 10, a plurality of light emitting units 30 disposed on the array substrate 10, and a thin film encapsulation layer 70 covering the plurality of light emitting units 30; at least one groove 40 is arranged between two adjacent light emitting units along a direction perpendicular to the array substrate 10, and at least part of the side surface of the groove 40 is overlapped with the side surface of the light emitting unit 30; the side of the light emitting unit 30 coinciding with the side of the recess 40 is provided with at least one first protrusion 61; the groove 40 is filled with an insulating connector 50, two ends of the insulating connector 50 are respectively connected with the array substrate 10 and the thin film encapsulation layer 70, and a first concave portion 62 embedded with the first convex portion 61 is formed on the insulating connector 50.
In the present embodiment, the array substrate 10 is located at a bottom layer of the flexible display panel, and is used to carry other devices of the flexible display panel and to control current flowing into the light emitting unit 30. The plurality of light emitting cells 30 are disposed on the array substrate 10, and the plurality of light emitting cells 30 are generally arranged in an array on the array substrate 10. The thin film encapsulation layer 70 covers the plurality of light emitting units 30, and is used to prevent water and oxygen from entering the light emitting units 30, thereby prolonging the service life of the flexible display panel.
In one possible way, the insulating connector 50 is provided in plurality and may be used to separate the respective light emitting cells 30; in another possible implementation manner, the flexible display panel provided in this embodiment further includes a pixel defining layer 20, a groove 40 located between two adjacent light emitting units 30 penetrates through the pixel defining layer 20, and the groove 40 is disposed in a direction perpendicular to the array substrate 10. The following embodiments are described taking as an example that the flexible display panel includes the pixel defining layer 20. The number of the grooves 40 can be one or more; the cross-sectional shape of the groove 40 may be a circle, an ellipse, a rectangle, a diamond, a pentagon, a hexagon, or the like, and may be specifically selected according to actual needs, and the shape of the groove 40 is not specifically limited in this embodiment. The side surface of the groove 40 coinciding with the side surface of the light emitting unit 30 may be one or more. It is understood that, in the flexible display panel, the height of the pixel defining layer 20 relative to the array substrate 10 is generally greater than or equal to the height of the light emitting unit 30 relative to the array substrate 10, and therefore, the depth of the groove 40 penetrating through the pixel defining layer 20 is generally greater than or equal to the height of the light emitting unit 30 relative to the array substrate 10, and therefore, after the groove 40 is filled with the insulating connector 50, the first protrusion 61 formed at the side of the light emitting unit 30 can be embedded into the insulating connector 50.
In one possible implementation, as shown in fig. 4, the pixel defining layer 20 is provided with one groove 40, and the sectional shape of the groove 40 is rectangular. Taking the placement orientation of the flexible display panel shown in fig. 4 as an example, the left side surface a of the recess 40 coincides with the right side surface of the light emitting unit 30 located on the left side of the recess 40, and the right side surface b of the recess 40 coincides with the left side surface of the light emitting unit 30 located on the right side of the recess 40. In another possible implementation, as shown in fig. 5, the pixel defining layer 20 is provided with two grooves 40, and both the grooves 40 have a rectangular cross-sectional shape. Taking the placement orientation of the flexible display panel shown in fig. 5 as an example, the left side a of the upper recess 40 coincides with the right side of the light emitting unit 30 located on the left side of the recess 40, and the right side b of the upper recess 40 coincides with the left side of the light emitting unit 30 located on the right side of the recess 40; the left side surface c of the lower recess 40 coincides with the right side surface of the light emitting unit 30 located on the left side of the recess 40, and the right side surface d of the lower recess 40 coincides with the left side surface of the light emitting unit 30 located on the right side of the recess 40. In another possible implementation, as shown in fig. 6, the pixel defining layer 20 is provided with one groove 40, and the sectional shape of the groove 40 is rectangular. Taking the placement orientation of the flexible display panel shown in fig. 6 as an example, the side surface a of the recess 40 coincides with the right side surface of the light emitting unit 30 located on the upper left side of the recess 40, the side surface h of the recess 40 coincides with the lower side surface of the light emitting unit 30 located on the upper left side of the recess 40, the side surface b of the recess 40 coincides with the left side surface of the light emitting unit 30 located on the upper right side of the recess 40, the side surface c of the recess 40 coincides with the lower side surface of the light emitting unit 30 located on the upper right side of the recess 40, the side surface g of the recess 40 coincides with the upper side surface of the light emitting unit 30 located on the lower left side of the recess 40, the side surface f of the recess 40 coincides with the right side surface of the light emitting unit 30 located on the lower left side of the recess 40, the side surface d of the recess 40 coincides with the upper side surface of the light emitting unit 30 located on.
In this embodiment, a side surface of the light emitting unit 30 coinciding with a side surface of the groove 40 is provided with a first protrusion 61, and the first protrusion 61 extends into the groove 40. The number of the first protrusions 61 may be one or more. In a possible implementation manner, as shown in fig. 2, the groove 40 is located between two light emitting units 30, and a side surface of each light emitting unit 30 facing the groove 40 is provided with a first protruding portion 61, taking the placement orientation of the flexible display panel shown in fig. 2 as an example, a right side surface of the light emitting unit 30 located at the left side surface of the groove 40 is provided with a first protruding portion 61, and a left side surface of the light emitting unit 30 located at the right side surface of the groove 40 is provided with a first protruding portion 61. In another possible implementation manner, as shown in fig. 7, the groove 40 is located between two light emitting units 30, and a side surface of each light emitting unit 30 facing the groove 40 is provided with two first protruding portions 61, taking the placement orientation of the flexible display panel shown in fig. 7 as an example, two first protruding portions 61 are provided on a right side surface of the light emitting unit 30 located on a left side surface of the groove 40, and two first protruding portions 61 are provided on a left side surface of the light emitting unit 30 located on a right side surface of the groove 40.
In this embodiment, the insulating connector 50 is filled in the groove 40 and is fitted with the first protrusion 61. The material of the insulating connecting member 50 may be a sticky and elastic glue material, specifically, an optical glue, or a potting glue. The insulating connection member 50 can be connected to each first functional film layer of the light emitting unit 30, so as to enhance the bonding force between the first functional film layers of the light emitting unit 30, and reduce or avoid the peeling or separation of the first functional film layers of the light emitting unit 30 during the bending process of the flexible display panel. In addition, as shown in fig. 8, since the insulating connection member 50 is filled in the groove 40, the insulating connection member 50 forms a first recess 62 which is engaged with the first protrusion 61, and the engagement between the first functional film layers of the light emitting unit 30 and the insulating connection member 50 is generated by the engagement between the first protrusion 61 and the first recess 62, thereby increasing the connection force between the first functional film layers of the light emitting unit 30.
In the flexible display panel provided by this embodiment, the groove 40 is disposed between two adjacent light emitting units 30, the insulating connection member 50 is embedded in the groove 40, and two ends of the insulating connection member 50 are respectively connected to the array substrate 10 and the film encapsulation layer 70, therefore, the array substrate 10, the light emitting units 30 and the film encapsulation layer 70 are not only attached to each other by van der waals force, but also connected by the insulating connection member 50, thereby improving the bonding force between the functional film layers in the flexible display panel, and reducing or avoiding the peeling or separation between the functional film layers of the flexible display panel during the bending process.
In addition, since the side surface of the light emitting unit 30 is overlapped with a partial side surface of the groove 40, and the side surface of the light emitting unit 30 is provided with the first protrusion 61, when the groove 40 is filled with the insulating material to form the insulating connection member 50, the first recess 62 which is embedded with the first protrusion 61 is formed inside the insulating connection member 50, so that the design not only increases the contact area between the insulating connection member 50 and the side surface of each first functional film layer of the light emitting unit 30 and improves the bonding force between each first functional film layer of the light emitting unit 30, but also utilizes the first protrusion 61 and the first groove 40 which are embedded with each other to generate the engagement force between each first functional film layer of the light emitting unit 30 and the insulating connection member 50, thereby further improving the bonding force between each first functional film layer of the light emitting unit 30 and further reducing or avoiding the situation that each first functional film layer of the light emitting unit 30 is peeled or separated during the bending process, the service life of the flexible display panel is prolonged, and the problem that peeling is easy to occur between two adjacent functional film layers in the conventional flexible display panel is solved.
In the flexible display panel, the light emitting unit 30 generally includes a plurality of first functional film layers sequentially stacked on the array substrate 10; the first protrusions 61 are formed on the side of at least one first functional film layer. Specifically, taking the example that one first protrusion 61 is disposed on the side surface of the light emitting unit 30, the first protrusion 61 may be formed on one first functional film layer, or may be formed on a plurality of first functional film layers. The plurality of first functional film layers are an anode layer 31, a hole injection layer 32, a hole transport layer 33, a pixel layer 35, an electron transport layer 37, an electron injection layer 38 and a cathode layer 39 in sequence; or a cathode layer 39, an electron injection layer 38, an electron transport layer 37, a pixel layer 35, a hole transport layer 33, a hole injection layer 32, and an anode layer 31. It is understood that the light emitting unit 30 may further include a hole blocking layer 36 and an electron blocking layer 34, as shown in fig. 1, the hole blocking layer 36 is disposed between the electron transport layer 37 and the pixel layer 35, and the electron blocking layer 34 is disposed between the hole transport layer 33 and the pixel layer 35.
In one possible implementation manner, the first protrusions 61 are disposed at the sides of a plurality of first functional film layers, for example, as shown in fig. 9, one first protrusion 61 is disposed at each of the left side and the right side of the groove 40, and each first protrusion 61 is formed at the sides of the anode layer 31, the hole injection layer 32, the hole transport layer 33, and the pixel layer 35, that is, the first protrusions 61 are disposed at the sides of four first functional film layers.
In another possible implementation manner, the first protrusions 61 are disposed on the side of one first functional film layer, for example, as shown in fig. 10, one first protrusion 61 is disposed on each of the left and right sides of the groove 40, and each first protrusion 61 is formed on the side of the anode layer 31.
The number of the first protruding portions 61 may be one or more, each of the first protruding portions 61 may be formed on a side surface of one or more layers of the first functional film layer, and the embodiment does not specifically limit the number and the forming position of the first protruding portions 61.
In a preferred embodiment, there are a plurality of first protrusions 61 on each light emitting unit 30, and the plurality of first protrusions 61 are arranged at intervals along a direction perpendicular to the array substrate 10. Correspondingly, a plurality of first concave parts 62 corresponding to the plurality of first convex parts 61 one to one are also arranged on the insulating connecting piece 50 embedded in the groove 40, the plurality of first convex parts 61 and the plurality of first concave parts 62 are all arranged at intervals along the direction perpendicular to the array substrate 10, and the arrangement mode can be uniform arrangement or non-uniform arrangement. Preferably, as shown in fig. 1, in the present embodiment, a plurality of first protrusions 61 are uniformly arranged on the side surface of the light emitting unit 30 along the direction perpendicular to the array substrate 10, and one first protrusion 61 is disposed on each of the side surfaces of the anode layer 31, the hole transport layer 33, the pixel layer 35, the electron transport layer 37, and the cathode layer 39 of the light emitting unit 30, so that the insulating connection member 50 is uniformly engaged with each of the first functional film layers of the light emitting unit 30, thereby further improving the connection force between the first functional film layers of the light emitting unit 30.
Further, in a preferred embodiment, two opposite side surfaces of the groove 40 are respectively overlapped with the side surfaces of two adjacent light emitting units 30 of the groove 40, and the insulating connector 50 is a non-light-tight insulating connector 50. Illustratively, as shown in fig. 4, the groove 40 is disposed between two adjacent light emitting units 30, and two opposite side surfaces of the groove 40 coincide with the side surfaces of the light emitting units 30 on two sides thereof, so that the insulating connection member 50 not only serves to connect the first functional film layers of the light emitting units 30, but also isolates the two light emitting units 30 to prevent the light emitted from the two light emitting units 30 from causing light mixing or crosstalk.
It should be added that the material of the insulating connection member 50 may be the same as the material of the pixel defining layer 20, such as an insulating inorganic material, such as silicon nitride, silicon carbide, and silicon oxide, and an organic polymer, such as Polyimide (PI) and polytetrafluoroethylene (ptfe).
Further, in another preferred embodiment, a part of the side surface of the groove 40 coincides with the side surface of the light emitting unit 30 located around the groove 40. Specifically, as shown in fig. 6, the position of the insulating connection member 50 is the position of the groove 40, and the side surface of the groove 40 coincides with a part of the side surfaces of the light emitting units 30 around the groove, that is, the groove 40 is disposed between the light emitting units 30 in this embodiment. In an implementation, the insulating connection member 50 may partially or completely replace the pixel defining layer 20, that is, may be used to separate the light emitting units 30, in which case the insulating connection member 50 is an opaque insulating connection member 50. In the present embodiment, the insulating connector 50 is disposed between the plurality of light emitting cells 30, so that the coupling force between the light emitting cells 30 is enhanced, thereby improving the lifespan of the flexible display panel.
In a preferred embodiment, the number of the grooves 40 may be multiple, the plurality of grooves 40 are distributed in an array, and one groove 40 is disposed between every two adjacent light emitting units 30. By such design, the plurality of grooves 40 are uniformly distributed among the plurality of light emitting units 30, and the insulating connection members 50 are also uniformly distributed among the plurality of light emitting units 30, so that the bonding force between the first functional film layers of the light emitting units 30 located in different regions in the flexible display panel tends to be consistent or the same, thereby preventing the service life of the whole flexible display panel from being affected due to the separation or peeling of the first functional film layers of the light emitting units 30 in local regions. In addition, since the material of the insulating connection member 50 is generally a rubber material having viscosity and elasticity, the stress generated during the bending process of the flexible display panel can be absorbed by the insulating connection members 50 uniformly distributed among the light emitting units 30, so as to avoid stress concentration, thereby further reducing or avoiding the peeling or separation of the first functional film layers of the light emitting units 30 during the bending process.
The array substrate 10 comprises a substrate 11 and at least one second functional film layer stacked on the substrate 11, wherein the at least one second functional film layer comprises a buffer layer 12, a gate electrode layer 13, a gate insulating layer 14, an active layer, an interlayer insulating layer, a source drain layer and a flat layer; the groove 40 extends to the base substrate 11. Specifically, as shown in fig. 11, taking the orientation of the array substrate 10 shown in fig. 11 as an example, the buffer layer 12, the gate electrode layer 13, the gate insulating layer 14, the active layer 15, the interlayer insulating layer 16, the source/drain layer 17, and the planarization layer 18 are sequentially stacked from bottom to top on the substrate 11. In this embodiment, the groove 40 extends downward from the flat layer 18 and penetrates through the source/drain layer 17, the interlayer insulating layer 16, the active layer 15, the gate insulating layer 14, the gate electrode layer 13, and the buffer layer 12 to the substrate 11, and correspondingly, the insulating connecting member 50 filled in the groove 40 also extends to the substrate 11 and is connected to the substrate 11. In this embodiment, the arrangement of the insulating connection member 50 extending into the array substrate 10 enhances the bonding force between the second functional film layers in the array substrate 10 and the bonding force between the array substrate 10 and the light emitting unit 30 and the pixel defining layer 20.
The side of the groove 40 is provided with a second recess 64 recessed into at least one second functional film layer between the base substrate 11 and the planarization layer 18; the insulating connector 50 extends to the substrate base plate 11, and the insulating connector 50 is provided with a second convex portion 63 fitted with the second concave portion 64. Specifically, the side surface of the groove 40 is provided with a second recessed portion 64, correspondingly, the insulating connector 50 is provided with a second protruding portion 63 which is embedded with the second recessed portion 64, the number of the second recessed portions 64 may be one, or a plurality of, and correspondingly, the number of the second protruding portions 63 may be one, or a plurality of. In one possible implementation, as shown in fig. 11, one second protrusion 63 is disposed on each of the buffer layer 12, the gate insulating layer 14, the interlayer insulating layer 16, and the planarization layer 18. The arrangement of the second concave portion 64 and the second convex portion 63 further enhances the bonding force of each second functional film layer in the array substrate 10.
The thin film encapsulation layer 70 includes a plurality of encapsulation units 71 arranged in a stack; the groove 40 extends upwardly and through the thin film encapsulation layer 70. Specifically, as shown in fig. 1, when the material of the insulating connection member 50 is the same as or similar to that of the thin film encapsulation layer 70, the groove 40 in this embodiment may extend through the thin film encapsulation layer 70, i.e. extend to the top of the thin film encapsulation layer 70, and correspondingly, the insulating connection member 50 filled in the groove 40 also extends to the top of the thin film encapsulation layer 70, extends through each encapsulation unit 71 of the thin film encapsulation layer 70 and is connected with each encapsulation unit 71 of the thin film encapsulation layer 70. In another embodiment, the insulating connector 50 filled in the groove 40 extends to the bottom of the encapsulation unit 71 at the top and is connected with each encapsulation unit 71 of the thin film encapsulation layer 70. In this embodiment, the arrangement of the insulating connection member 50 extending into the film encapsulation layer 70 enhances the bonding force between the second functional film layers in the film encapsulation layer 70 and the bonding force between the film encapsulation layer 70 and the light emitting unit 30 and the pixel defining layer 20.
The side of the groove 40 is provided with a third recess 66 recessed into the at least one encapsulation unit 71; the insulating connector 50 extends upward and penetrates the film encapsulation layer 70, and the insulating connector 50 is provided with a third protruding portion 65 which is embedded with the third recessed portion 66. In one possible implementation manner, as shown in fig. 1, taking the flexible display panel placement orientation shown in fig. 1 as an example, the thin film encapsulation layer 70 on the right side of the groove 40 includes three encapsulation units 71, and the left side surface of the encapsulation unit 71 in the middle is provided with the third protruding portion 65. The third recess 66 and the third protrusion 65 are disposed to further enhance the bonding force of each second functional film layer in the thin film encapsulation layer 70.
The groove 40 and the insulating connection member 50 formed in the pixel defining layer 20 in the above embodiment may be fabricated as follows;
taking the fabrication of the insulating connection member 50 in the light emitting unit 30 as an example, in one possible implementation, an opaque insulating layer is first formed on the array substrate 10 by a coating-curing method, an inkjet printing method, or a deposition method, and then the insulating layer is subjected to glue coating, masking, exposure, development, and etching to form a pixel defining layer 20 including a plurality of pixel regions; then forming an anode layer 31 and a hole injection layer 32 in the pixel region, then forming a groove 40 and a first protruding part 61 extending into the groove 40 in the anode layer 31 and the hole injection layer 32 by laser drilling, etching and other methods, and then filling an insulating material into the groove 40 by adopting an ink-jet printing mode; then, forming a hole transport layer 33 and an electron blocking layer 34 above the hole injection layer 32, then forming a groove 40 and a first protruding part 61 extending into the groove 40 in the hole transport layer 33 and the electron blocking layer 34 by laser drilling, etching and the like, and then filling an insulating material into the groove 40; then, forming a pixel layer 35 and a hole blocking layer 36 above the electron blocking layer 34, then forming a groove 40 and a first protruding portion 61 extending into the groove 40 in the pixel layer 35 and the hole blocking layer 36 by laser drilling, etching and the like, and then filling an insulating material into the groove 40; then, forming an electron transport layer 37 and an electron injection layer 38 above the hole blocking layer 36, then forming a groove 40 and a first protruding portion 61 extending into the groove 40 in the electron transport layer 37 and the electron injection layer 38 by laser drilling, etching and the like, and then filling an insulating material into the groove 40; thus, the insulating connector 50 is inserted into the groove 40, and the insulating connector 50 is engaged with the first protrusion 61.
Example two
A second embodiment of the present invention provides a flexible display device, where the flexible display device provided in this embodiment includes the flexible display panel provided in the first embodiment, and the structure, function, and implementation of the display panel may refer to the detailed description in the foregoing embodiments, which is not described herein again. The flexible display device provided by the embodiment further comprises a barrier film, a touch screen, a polarizer, a cover plate and an optical adhesive, wherein the barrier film, the touch screen, the polarizer and the cover plate are arranged on the flexible display panel. The flexible display device provided by the embodiment can be any product or component with a display function, such as an OLED display device, a television including the OLED display device, a digital camera, a mobile phone, a tablet computer, a smart watch, an electronic book, and a navigator.
In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled 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 invention.
Claims (6)
1. A flexible display panel, comprising: the array substrate, set up multiple luminescent units on the said array substrate, and cover the thin-film packaging layer of the said multiple luminescent units;
at least one groove is arranged between two adjacent light-emitting units along the direction vertical to the array substrate, and at least part of the side surface of the groove is overlapped with the side surface of the light-emitting unit; the side surface of the light-emitting unit, which is overlapped with the side surface of the groove, is provided with at least one first protruding part;
an insulating connecting piece is filled in the groove, two ends of the insulating connecting piece are respectively connected with the array substrate and the thin film packaging layer, and a first concave part embedded with the first convex part is formed in the insulating connecting piece;
two opposite side surfaces of the groove are respectively superposed with the side surfaces of two adjacent light-emitting units of the groove, and the insulating connecting piece is a lighttight insulating connecting piece;
or, partial side surface of the groove is superposed with the side surface of the light-emitting unit positioned around the groove, and the insulating connecting piece is a lighttight insulating connecting piece;
the array substrate comprises a substrate and at least one second functional film layer stacked on the substrate, wherein the at least one second functional film layer comprises a buffer layer, a grid insulating layer, an active layer, an interlayer insulating layer, a source drain layer and a flat layer; the groove extends to the substrate base plate, and a second sunken part which is sunken into the at least one second functional film layer is arranged on the side surface of the groove; the insulating connecting piece extends to the substrate base plate and is provided with a second convex part embedded with the second concave part;
the thin film packaging layer comprises a plurality of packaging units which are arranged in a stacked mode; the groove extends upwards and penetrates through the film packaging layer, and a third sunken part which is recessed into at least one packaging unit is arranged on the side surface of the groove; the insulating connecting piece extends upwards and penetrates through the film packaging layer, and the insulating connecting piece is provided with a third protruding portion embedded with the third recessed portion.
2. The flexible display panel according to claim 1, wherein each of the light emitting units comprises a plurality of first functional film layers stacked on the array substrate;
the first bulge is formed on the side face of at least one first functional film layer.
3. The flexible display panel of claim 2, wherein the plurality of first functional film layers are an anode layer, a hole injection layer, a hole transport layer, a pixel layer, an electron transport layer, an electron injection layer, and a cathode layer; or a cathode layer, an electron injection layer, an electron transport layer, a pixel layer, a hole transport layer, a hole injection layer, and an anode layer.
4. The flexible display panel according to claim 1, wherein the number of the first protruding portions on the light emitting unit is plural, and the plural first protruding portions are arranged at intervals in a direction perpendicular to the array substrate.
5. The flexible display panel according to claim 1, wherein the number of the grooves is plural, the plural grooves are distributed in an array, and one groove is disposed between each two adjacent light emitting units.
6. A flexible display device comprising the flexible display panel according to any one of claims 1 to 5.
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| CN110599909B (en) * | 2019-09-25 | 2021-11-23 | 昆山工研院新型平板显示技术中心有限公司 | Foldable display panel and display device |
| CN111129348A (en) * | 2019-12-24 | 2020-05-08 | 武汉华星光电半导体显示技术有限公司 | Display panel and method for manufacturing the same |
| CN111403449B (en) * | 2020-03-26 | 2024-04-23 | 武汉华星光电半导体显示技术有限公司 | Display panel and manufacturing method thereof |
| CN112785931B (en) * | 2020-12-31 | 2023-09-19 | 厦门天马微电子有限公司 | display device |
| CN113957486B (en) * | 2021-11-03 | 2023-03-21 | 阿坝铝厂 | Anode carbon block for continuous prebaking |
| CN115206193B (en) * | 2022-07-28 | 2024-06-04 | 维沃移动通信有限公司 | Flexible display screen and electronic equipment |
| CN117202692B (en) * | 2023-11-07 | 2024-04-12 | 惠科股份有限公司 | Organic electroluminescent device, manufacturing method thereof and display panel |
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| KR20160066650A (en) * | 2014-12-02 | 2016-06-13 | 삼성디스플레이 주식회사 | Fabrication method of display device and display device |
| CN106783881A (en) * | 2016-12-26 | 2017-05-31 | 武汉华星光电技术有限公司 | A kind of flexible display panels and its manufacture method |
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Application publication date: 20190301 Assignee: Bazhou Yungu Electronic Technology Co., Ltd.|Kunshan Institute of technology new flat panel display technology center Co., Ltd.|Kunshan Guoxian photoelectric Co., Ltd Assignor: The valley (Guan) Technology Co. Ltd. Contract record no.: X2019990000155 Denomination of invention: Flexible display panel and flexible display device License type: Common License Record date: 20191030 |
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Effective date of registration: 20191211 Address after: No. 2 Xiangshan Avenue, Yongning Street, Zengcheng District, Guangzhou, Guangdong province (the core of Zengcheng economic and Technological Development Zone) Applicant after: Guangzhou Guoxian Technology Co., Ltd Address before: 065500 Hebei Langfang County Guan emerging industry demonstration area Applicant before: The valley (Guan) Technology Co. Ltd. |
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