CN109300939A - Flexible display panels and preparation method thereof, display device - Google Patents
Flexible display panels and preparation method thereof, display device Download PDFInfo
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- CN109300939A CN109300939A CN201811004977.5A CN201811004977A CN109300939A CN 109300939 A CN109300939 A CN 109300939A CN 201811004977 A CN201811004977 A CN 201811004977A CN 109300939 A CN109300939 A CN 109300939A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/1201—Manufacture or treatment
Abstract
This application provides a kind of flexible display panels and preparation method thereof, display device.The flexible display panels include: flexible substrate, are formed with open slot in the flexible substrate；The functional layer being formed in the open slot；It is formed in the encapsulated layer in the open slot and being located on the functional layer；The transparent organic layer being formed on the encapsulated layer, the transparent organic layer is by the closure of openings of the open slot.The adhesiveness between the adjacent film layers of flexible display panels can be improved in the application, and then improves the display effect of flexible display panels, prolongs its service life.
Description
Technical field
This application involves display device technology fields more particularly to a kind of flexible display panels and preparation method thereof, display
Device.
Background technique
Flexible display apparatus have the characteristics that it is flexible or foldable, be widely used in communication terminal, tablet computer,
In many electronic devices such as e-book, navigation equipment.
Flexible display apparatus is in bending, if bending degree is larger, adjacent film layer is easy to happen removing, and encapsulated layer
Inorganic film is easily broken, so that flexible display apparatus be made partly or entirely to fail, influences the display effect of flexible display apparatus
Fruit and service life.
Summary of the invention
According to the embodiment of the present application in a first aspect, providing a kind of flexible display panels, comprising:
Flexible substrate is formed with open slot in the flexible substrate；
The functional layer being formed in the open slot；
It is formed in the encapsulated layer in the open slot and being located on the functional layer；
The transparent organic layer being formed on the encapsulated layer, the transparent organic layer seal the opening of the open slot
It closes.
In one embodiment of the application, the functional layer includes TFT layer and the OLED that is formed on the TFT layer
Layer.
In one embodiment of the application, the oled layer includes the multiple pixels being intervally arranged, the encapsulated layer packet
Multiple sub- encapsulated layers are included, multiple sub- encapsulated layers are covered on correspondingly in multiple pixels.
In one embodiment of the application, separation structure is formed between the sub- encapsulated layer of adjacent two.
In one embodiment of the application, the separation structure is organic material.
In one embodiment of the application, the height of the side wall of the height of the separation structure and the open slot is all big
In the height of the sub- encapsulated layer.
According to the second aspect of the embodiment of the present application, a kind of preparation method of flexible display panels, the method are provided
Include:
Open slot is prepared on flexible substrates；
Functional layer is prepared in the open slot；
Preparation is located at the encapsulated layer on the functional layer in the open slot；
It prepares on the encapsulated layer by the transparent organic layer of the closure of openings of the open slot.
It is described to prepare functional layer in the open slot in one embodiment of the application, comprising:
TFT layer is prepared in the open slot；
Preparation is located at the oled layer on the TFT layer in the open slot, and the oled layer includes being intervally arranged
Multiple pixels, the encapsulated layer include multiple sub- encapsulated layers, and multiple sub- encapsulated layers are covered on multiple described correspondingly
In pixel.
In one embodiment of the application, it is formed with separation structure between the sub- encapsulated layer of adjacent two, it is described
Separation structure is organic material.
According to the third aspect of the embodiment of the present application, a kind of display device is provided, the display device includes above-mentioned
Flexible display panels.
Flexible display panels provided by the embodiments of the present application and preparation method thereof, display device, by flexible substrates
Open slot is formed, forms functional layer and encapsulated layer in open slot, and is formed on encapsulated layer by the closure of openings of open slot
Transparent organic layer, then flexible substrate and transparent organic layer wrap up functional layer and encapsulated layer, and flexible display panels form one
It is whole.For flexible display panels in bending, deformation occurs simultaneously with encapsulated layer for transparent organic layer, and transparent organic layer applies encapsulated layer
Add downward active force, increases the adhesiveness in encapsulated layer and functional layer between adjacent film layers, so that adjacent film layers are not susceptible to
Removing, can be improved the display effect of flexible display panels, prolongs its service life.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of flexible display panels provided by the embodiments of the present application；
Fig. 2 is a kind of flow chart of the preparation method of flexible display panels provided by the embodiments of the present application；
Fig. 3 is a kind of schematic diagram of first intermediate structure of flexible display panels provided by the embodiments of the present application；
Fig. 4 is the flow chart provided by the embodiments of the present application that functional layer is prepared in open slot；
Fig. 5 is a kind of schematic diagram of second intermediate structure of flexible display panels provided by the embodiments of the present application；
Fig. 6 is a kind of schematic diagram of the third intermediate structure of flexible display panels provided by the embodiments of the present application；
Fig. 7 is a kind of schematic diagram of 4th intermediate structure of flexible display panels provided by the embodiments of the present application；
Fig. 8 is a kind of schematic diagram of 5th intermediate structure of flexible display panels provided by the embodiments of the present application；
Fig. 9 is a kind of schematic diagram of 6th intermediate structure of flexible display panels provided by the embodiments of the present application.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.
It is only to be not intended to be limiting the application merely for for the purpose of describing particular embodiments in term used in this application.
Unless otherwise defined, technical term or scientific term used in this application, which are should be in fields of the present invention, has general skill
The ordinary meaning that the personage of energy is understood.The classes such as "one" or " one " used in present specification and claims
It does not indicate that quantity limits like word yet, but indicates that there are at least one.The similar word such as " connection " or " connected " is not
It is defined in physics or mechanical connection, and may include electrical connection, it is either direct or indirect.It is " more
It is a " it include two, it is equivalent at least two.In present specification and singular used in the attached claims
"an", " described " and "the" are also intended to including most forms, unless the context clearly indicates other meaning.
With reference to the accompanying drawing, the flexible display panels and preparation method thereof in the embodiment of the present application are described in detail.
In the absence of conflict, the feature in following embodiment and embodiment can be complementary to one another or be combined with each other.
It in the embodiment of the present application, is upper by the direction that functional layer is directed toward encapsulated layer.
Fig. 1 is the structural schematic diagram of flexible display panels 100 provided by the present application.Referring to Fig. 1, the embodiment of the present application is provided
Flexible display panels 100 include flexible substrate 1, functional layer 2, encapsulated layer 3 and transparent organic layer 4.Wherein, in flexible substrate 1
It is formed with open slot (not labeled).Functional layer 2 is formed in open slot.Encapsulated layer 3 is formed in open slot and is located at functional layer 2
On.Transparent organic layer 4 is formed on encapsulated layer 3, and transparent organic layer 4 is by the closure of openings of open slot.
Flexible display panels 100 provided by the embodiments of the present application are being open by forming open slot in flexible substrate 1
Functional layer 2 and encapsulated layer 3 are formed in slot, and are formed on encapsulated layer 3 by the transparent organic layer 4 of the closure of openings of open slot,
Then flexible substrate 1 and transparent organic layer 4 wrap up functional layer 2 and encapsulated layer 3, and flexible display panels 100 form an entirety.It is soft
Property display panel 100 bending when, deformation occurs simultaneously with encapsulated layer 3 for transparent organic layer 4, and transparent organic layer 4 is to encapsulated layer 3
Apply downward active force, increases the adhesiveness in encapsulated layer 3 and functional layer 2 between adjacent film layers, so that adjacent film layers are not easy
It is peeling-off, the display effect of flexible display panels can be improved, prolong its service life.
In one embodiment, functional layer 2 include TFT (Thin Film Transistor, thin film transistor (TFT)) layer 21 and
OLED (Organic Light-Emitting Diode, the Organic Light Emitting Diode) layer 22 being formed on TFT layer 21.
TFT layer 21 may include gate electrode, source electrode, drain electrode and the planarization layer positioned at top layer.Wherein, gate electrode,
Source electrode and drain electrode can be prepared by metal or metal alloy.Planarization layer can be prepared by organic insulating material, flat
Change layer and is equipped with contact hole.
Oled layer 22 may include first electrode, the organic luminous layer being formed on first electrode and be formed in organic light emission
Second electrode on layer.Wherein, first electrode is electrically connected by contact hole with the drain electrode of TFT layer 21, thus TFT layer 21
Drain electrode can drive the organic luminous layer of oled layer 22 to shine by first electrode.
In one embodiment, oled layer 22 includes the multiple pixels 221 being intervally arranged, and encapsulated layer 3 includes multiple sub- envelopes
Layer 31 is filled, multiple sub- encapsulated layers 31 are covered on correspondingly in multiple pixels 221.Sub- encapsulated layer 31 may include successively alternating layer
Folded inorganic layer and organic layer, wherein outermost layer can be inorganic layer.Sub- encapsulated layer 31 can prevent external water or oxygen from infiltrating into
Pixel 221 is damaged in pixel 221, to extend the service life of flexible display panels 100.
In one embodiment, oled layer 22 further includes the multiple pixels limit for being formed on TFT layer 21 and being intervally arranged
Determine structure 222, aperture is provided on pixel limiting structure 222, multiple pixels are arranged in correspondingly and limit for multiple pixels 221
In the aperture of structure 222, multiple sub- encapsulated layers 31 are covered on the top and side of pixel limiting structure 222 correspondingly.
Since the size of sub- encapsulated layer 31 is smaller, pixel 221 is individually packaged using sub- encapsulated layer 31, Flexible Displays
Panel 100 can avoid the inorganic fault rupture of sub- encapsulated layer 31, to improve the bending of flexible display panels 100 in bending
Energy.
Further, separation structure 5 is formed between adjacent two sub- encapsulated layers 31.Separation structure 5 is by adjacent two
A sub- encapsulated layer 31 separates, then each sub- encapsulated layer 31 is arranged between two adjacent separation structures 5.Flexible display panels
100 in bending, and separation structure 5 can prevent pixel 221 and sub- encapsulated layer 31 from occurring mobile and influencing flexible display panels 100
Display effect.
Further, separation structure 5 is organic material.The flexibility of organic material is larger, and bending performance is good.Separation structure 5
For organic material, then in bending, separation structure 5 can be sent out flexible display panels 100 with the bending of flexible display panels 100
Raw deformation, keeps the flexibility of flexible display panels 100 more preferable.Also, separation structure 5 is organic material, relative to using other
Material, the adhesiveness between separation structure 5 and transparent organic layer 4 is more preferable, the separation structure 5 in bending of flexible display panels 100
It is not readily separated with transparent organic layer 4, further increases the adhesiveness in encapsulated layer 3 and functional layer 2 between adjacent film layers.
The lower part of separation structure 5 can be connect with the planarization layer of TFT layer 21.Optionally, separation structure 5 and planarization layer one
It is body formed, it is identical as the material of planarization layer.Alternatively, separation structure 5 is also possible to the shape after the planarization layer of TFT layer 21
At separation structure 5 can also be identical as the organic layer material of encapsulated layer 3, or uses photoresist material.
In one embodiment, the height of the side wall 102 of the height of separation structure 5 and open slot is both greater than sub- encapsulated layer 31
Height.
The height of separation structure 5 be greater than the part of sub- encapsulated layer 31 side and separation structure 5 top surface respectively and thoroughly
Bright organic layer 4 contacts, so that separation structure 5 and the contact area of transparent organic layer 4 are larger, it is possible to increase the adhesiveness of the two.It opens
The height of the side wall 102 of mouth slot is greater than the medial surface of part of sub- encapsulated layer 31 and the top surface of side wall 102 to be had with transparent respectively
Machine layer 4 contacts, so that the side wall 102 of open slot and the contact area of transparent organic layer 4 are larger, it is possible to increase the adhesiveness of the two.
Also, transparent 4 part of organic layer be arranged between adjacent separation structure 5 or the side wall 102 of open slot and separation structure 5 it
Between, flexible display panels 100 can limit transparent organic layer 4 relative to the movement of encapsulated layer 3, increase transparent organic layer 4 in bending
With the adhesiveness between encapsulated layer 3.
In other embodiments, the height of the side wall 102 of the height of separation structure 5 or open slot also can be equal to or be less than
The height of sub- encapsulated layer 31.
Fig. 2 is the flow chart of the preparation method of flexible display panels provided by the embodiments of the present application.Referring to fig. 2, the preparation
Method includes the following steps 201 to step 204.
In step 201, open slot is formed on flexible substrates.
As shown in figure 3, for the structural schematic diagram for the first intermediate structure being prepared by step 201.
In one embodiment, flexible substrate 1 can be formed in the following manner: polymer solution is coated in rigid substrates
On, and curing process is carried out, to form flexible substrate 1.It is (poly- that polymer can be PEN (polyethylene naphthalate), PET
Ethylene glycol terephthalate), PI (polyimides), PES (polyethersulfone resin), PC (polycarbonate), PEI (polyetherimide)
One of or it is a variety of.
In one embodiment of the application, the opening can be formed in flexible substrate 1 by photoetching and etching technique
Slot 101.For example, can first one layer photoresist of spin coating on flexible substrates；Then opened by exposing, developing to being formed to have to photoresist
The photoetching agent pattern of mouth, the opening are corresponding with the shape of open slot to be formed and position；It is right using photoetching agent pattern as exposure mask
Flexible substrate performs etching, and forms the open slot.Wherein, the overall thickness of provided flexible substrate 1 can be greater than used in routine
The thickness of flexible substrate, the thickness that the thickness of the flexible substrate below open slot 101 can substantially with flexible substrate used in routine
It spends equal.
In step 202, functional layer is prepared in the open slot.
In one embodiment, functional layer 2 includes TFT layer 21 and the OLED layer 22 being formed on TFT layer 21.OLED
Layer 22 includes multiple multiple pixels 221 being intervally arranged.
In one embodiment, as shown in figure 4, step 202 may include following steps 2021 to step 2024.
In step 2021, TFT layer is prepared in the open slot, to obtain the second intermediate structure.
As shown in figure 5, being the structural schematic diagram of the second intermediate structure.
Wherein, TFT layer 21 may include gate electrode, source electrode, drain electrode and the planarization layer positioned at top layer.Planarization layer
It can be prepared by organic insulating material.Planarization layer is equipped with contact hole.Gate electrode, source electrode and drain electrode can by metal or
Metal alloy compositions are formed.
In step 2022, multiple separation structures being intervally arranged are formed on TFT layer, to obtain knot among third
Structure.
As shown in fig. 6, being the structural schematic diagram of third intermediate structure.
Wherein, separation structure 5 can be organic material.
In one embodiment, separation structure 5 can be integrally formed with the planarization layer on 21 upper layer of TFT layer, in preparation TFT
Preparation simultaneously is located at the separation structure 5 of 21 top of TFT layer when layer 21, i.e. step 2021 and step 2022 can carry out simultaneously.Specifically
Ground, when preparing TFT layer, formed top layer organic layer after, can by photoetching and etching technique on organic layer shape
At multiple grooves being spaced apart, separation structure 5 is formed between adjacent groove, the organic layer under groove is planarization layer.
Wherein, the overall thickness of the organic layer of TFT layer top layer is greater than the conventional thickness for being formed by planarization layer.In other embodiments
In, separation structure 5 can also be formed after the formation of TFT layer 21.
In step 2023, multiple pixel limiting structures are formed between adjacent spacer structure, obtain knot among the 4th
Structure.
As shown in fig. 7, being the structural schematic diagram of the 4th intermediate structure.Wherein, the side of pixel limiting structure 222 can with point
There are gaps between structure 5.
Wherein, aperture is provided on pixel limiting structure 222.Pixel limiting structure 222 can by inorganic insulating material (such as
Silicon nitride or Si oxide) or organic insulating material (such as acryl resin or imide resin) formation.
When pixel limiting structure 222 is formed by organic insulating material, preparation process can be as follows: tying among third first
It is global in the open slot of structure to form organic layer, partial etching extra on organic layer is fallen by photoetching and etching technique later,
To form the pixel limiting structure 222.
In step 2024, pixel is prepared in the aperture of each pixel limiting structure, to obtain the 5th intermediate structure.
As shown in figure 8, being the structural schematic diagram of the 5th intermediate structure.
Wherein, pixel 221 includes first electrode, the organic luminous layer being formed on first electrode and is formed in organic hair
Second electrode on photosphere.First electrode is contacted by the contact hole of TFT layer 21 with drain electrode.
In one embodiment, first electrode can be formed by metal or metal oxide.It is aoxidized with first electrode by metal
For object is formed, forming process is as follows: global deposition forms metal oxide layer first in the open slot of the 4th intermediate structure,
Unwanted partial etching is fallen using photoetching and etch process later, retains and is located in the opening of each pixel limiting structure 222
Part, that is, form each first electrode.
In one embodiment, second electrode can be formed by transparent conductive material, such as metal oxide.Second electrode
Forming process is similar with the forming process of first electrode.
In step 203, preparation is located at the encapsulated layer on the functional layer in the open slot.
As shown in figure 9, for the structural schematic diagram of the 6th intermediate structure formed by step 203.
In one embodiment of the application, encapsulated layer 3 includes multiple sub- encapsulated layers 31, and multiple sub- encapsulated layers 31 are one by one
Accordingly it is covered on the top and side of multiple pixel confining layers 222.
Sub- encapsulated layer 31 may include successively alternately stacked inorganic layer and organic layer, and wherein outermost layer can be inorganic layer.Son
Encapsulated layer 31 can prevent external water or oxygen from infiltrating into pixel and damaging to pixel, to improve flexible display panels
Service life.
In one embodiment, the preparation process of the inorganic layer of sub- packing layer 31 can be as follows: in opening for the 6th intermediate structure
Global deposition forms inorganic layer in mouth slot, is later fallen the extra partial etching of inorganic layer using photoetching and etch process, retains
Part between multiple separation structures 5.
The preparation process of the organic layer of sub- encapsulated layer 31 is as follows: global formation is organic in the open slot of the 6th intermediate structure
Layer is later fallen the extra partial etching of organic layer using photoetching and etch process, is retained between multiple separation structures 5
Part.
In one embodiment, the height of the side wall 102 of the height of separation structure 5 and open slot 101 is both greater than son packing
The height of layer 31.
In step 204, it prepares on the encapsulated layer by the transparent organic layer of the closure of openings of the open slot.
Transparent organic layer 4 and flexible substrate 1 wrap up functional layer 2 and encapsulated layer 3, keep flexible display panels formation one whole
Body.
The preparation method of flexible display panels provided by the embodiments of the present application, forms open slot on flexible substrates, is opening
Functional layer and encapsulated layer are formed in mouth slot, and is formed by the transparent organic layer of the closure of openings of open slot, then on encapsulated layer
Flexible substrate and transparent organic layer wrap up functional layer and encapsulated layer, and flexible display panels form an entirety.Flexible Displays face
For plate in bending, deformation occurs simultaneously with encapsulated layer for transparent organic layer, thus transparent organic layer applies downward work to encapsulated layer
Firmly, increase the adhesiveness in encapsulated layer and functional layer between adjacent film layers can be improved so that adjacent film layers are not susceptible to remove
The display effect of flexible display panels, prolongs its service life.
The embodiment of the present application also provides a kind of display device, the display device includes above-mentioned flexible display panels.
In one embodiment, display device further includes shell, and flexible display panels are fixed on the shell.
Display device in the embodiment of the present application can for Electronic Paper, mobile phone, tablet computer, television set, laptop,
Any products or components having a display function such as Digital Frame, navigator.
The above is only the preferred embodiment of the application, not does limitation in any form to the application, though
Right the application has been disclosed in a preferred embodiment above, however is not limited to the application, any technology people for being familiar with this profession
Member, in the range of not departing from technical scheme, when the technology contents using the disclosure above are modified or are repaired
Decorations are the equivalent embodiment of equivalent variations, but all contents without departing from technical scheme, the technology according to the application are real
Matter any simple modification, equivalent change and modification to the above embodiments, still fall within the range of technical scheme
It is interior.
Claims (10)
1. a kind of flexible display panels characterized by comprising
Flexible substrate (1) is formed with open slot on the flexible substrate (1)；
The functional layer (2) being formed in the open slot；
It is formed in the encapsulated layer (3) in the open slot and being located on the functional layer；
The transparent organic layer (4) being formed on the encapsulated layer (3), transparent organic layer (4) the opening the open slot
Mouth closing.
2. flexible display panels according to claim 1, which is characterized in that the functional layer (2) include TFT layer (21) and
The oled layer (22) being formed on the TFT layer (21).
3. flexible display panels according to claim 2, which is characterized in that the oled layer (22) includes being intervally arranged
Multiple pixels (221), the encapsulated layer (3) include multiple sub- encapsulated layers (31), and multiple sub- encapsulated layers (31) correspond
Ground is covered on multiple pixels (221).
4. flexible display panels according to claim 3, which is characterized in that the sub- encapsulated layer (31) of adjacent two it
Between be formed with separation structure (5).
5. flexible display panels according to claim 4, which is characterized in that the separation structure (5) is organic material.
6. flexible display panels according to claim 5, which is characterized in that the height of the separation structure (5) and described
The height of the side wall (102) of open slot is both greater than the height of the sub- encapsulated layer (31).
7. a kind of preparation method of flexible display panels, which is characterized in that the described method includes:
Open slot is prepared on flexible substrates；
Functional layer is prepared in the open slot；
Preparation is located at the encapsulated layer on the functional layer in the open slot；
It prepares on the encapsulated layer by the transparent organic layer of the closure of openings of the open slot.
8. preparation method according to claim 7, which is characterized in that described to prepare functional layer, packet in the open slot
It includes:
TFT layer is prepared in the open slot；
In the open slot preparation be located at the TFT layer on oled layer, the oled layer include be intervally arranged it is multiple
Pixel, the encapsulated layer include multiple sub- encapsulated layers, and multiple sub- encapsulated layers are covered on multiple pixels correspondingly
On.
9. preparation method according to claim 8, which is characterized in that be formed between the sub- encapsulated layer of adjacent two
Separation structure, the separation structure are organic material.
10. a kind of display device, which is characterized in that the display device includes described in any one of claims 1-6 flexible aobvious
Show panel.
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