CN105977277B - Flexible display panel, manufacturing method thereof and flexible display device - Google Patents
Flexible display panel, manufacturing method thereof and flexible display device Download PDFInfo
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- CN105977277B CN105977277B CN201610293386.9A CN201610293386A CN105977277B CN 105977277 B CN105977277 B CN 105977277B CN 201610293386 A CN201610293386 A CN 201610293386A CN 105977277 B CN105977277 B CN 105977277B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 239000000758 substrate Substances 0.000 claims abstract description 288
- 239000011368 organic material Substances 0.000 claims description 5
- -1 polyethylene Polymers 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000004952 Polyamide Substances 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 2
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 2
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 2
- HURSIASBWGCKKE-UHFFFAOYSA-N naphthalene naphthalene-1-carboxylic acid Chemical compound C1(=CC=CC2=CC=CC=C12)C(=O)O.C1=CC=CC2=CC=CC=C12 HURSIASBWGCKKE-UHFFFAOYSA-N 0.000 claims 1
- 239000011521 glass Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 5
- 238000012546 transfer Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
- H10K77/10—Substrates, e.g. flexible substrates
- H10K77/111—Flexible substrates
-
- 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
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention discloses a flexible display panel, a manufacturing method thereof and a flexible display device. In the stress concentration area, the elastic modulus close to the flexible substrate layer of the organic light-emitting layer is large, deformation cannot occur, the elastic modulus far away from the flexible substrate layer of the organic light-emitting layer is small, deformation preferentially occurs under the action of stress, and stress does not affect the flexible substrate layer close to the organic light-emitting layer after being released far away from the flexible substrate layer of the organic light-emitting layer, so that the organic light-emitting layer is protected, and the organic light-emitting layer is prevented from being broken or generating dark spots.
Description
Technical field
The present embodiments relate to display technology field more particularly to a kind of flexible display panels and its manufacturing method, with
And flexible display apparatus.
Background technology
Flexible display panels are a kind of bending deformed display devices, carry the flexible display of flexible display panels
Usually have many advantages, such as to be convenient for carrying, is light-weight, being not easy to break into pieces.
Existing flexible display panels, making step generally include：Heat-resisting flexible base board is coated on the glass substrate
Layer；It is made on flexible substrate layer and forms organic luminous layer；Glass substrate is removed so that glass substrate and flexible substrate layer point
From.In the prior art, generally use laser lift-off mode detaches flexible substrate layer and glass substrate.
In manufacturing process, because of environmental factor etc., tend to that flexible display panels surface or inside is caused to go out
Existing foreign matter, as shown in Figure 1, there are there are 2 ＇ of foreign matter between 1 ＇ of foreign matter or flexible substrate layer and glass substrate in the glass substrate back side
Under state, in laser irradiation process, foreign matter hinders laser binder between the flexible substrate layer and glass substrate in the region
Abundant irradiation, and then be not sufficiently illuminated between the flexible substrate layer and glass substrate corresponding to region (there are areas for foreign matter)
It bonds not by complete " cutting off ", during subsequent stripping glass substrate, being easy to cause foreign matter, there are the corresponding flexible bases in area
Plate layer and organic luminous layer damage, or even flexible substrate layer and organic luminous layer is made to be broken, and then destroy entire flexible aobvious
Show the display effect of panel.
Invention content
A kind of flexible display panels of present invention offer and preparation method thereof and flexible display apparatus, to avoid showing
Panel damages organic luminous layer during laser lift-off.
On the one hand, the present invention provides a kind of flexible display panels, wherein including array basal plate, and is arranged described
Organic luminous layer in array substrate, the array substrate include at least two flexible substrate layers, described at least two flexible bases
The elasticity modulus of plate layer tapers into gradient along the direction far from the organic luminous layer.
On the other hand, a kind of flexible display apparatus, wherein including flexible display panels described in any one of the above embodiments.
In another aspect, a kind of production method of flexible display panels, wherein
Array basal plate is provided；
An organic luminous layer is formed on the array substrate；
Wherein, the array substrate includes at least two flexible substrate layers, the elasticity of at least two flexible substrate layer
Modulus tapers into gradient along far from the organic luminous layer direction.
Compared with prior art, the beneficial effects of the present invention are：
The present invention in flexible display panels by being arranged at least two flexible substrate layers, at least two flexible base board
The elasticity modulus of layer tapers into gradient along the direction far from the organic luminous layer.It solves in stripping process because different
The presence of object, the release that stress can not continue to discharge, and then be converted into vertical direction in horizontal direction lead to flexible base board shape
The technical issues of change.In region of stress concentration, because the elasticity modulus of the flexible substrate layer close to organic luminous layer is larger, Wu Fafa
Raw deformation, and the elasticity modulus far from organic luminous layer flexible substrate layer is smaller, and then preferred occur occurs under stress
Deformation, stress, will not to close organic luminous layer flexible substrate layer after far from organic luminous layer flexible substrate layer completely release
It has an impact, and then protects organic luminous layer, organic luminous layer is avoided to be broken, i.e., not will produce under dispaly state dark
Point.
Description of the drawings
Fig. 1 is the structural schematic diagram for the flexible display panels that foreign matter exists in the prior art；
Fig. 2 is a kind of structural schematic diagram of flexible display panels provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the flexible display panels of another kind provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the flexible display panels of another provided in an embodiment of the present invention；
Fig. 5 is that the embodiment of the present invention also provides a kind of structural schematic diagram of flexible display panels；
Fig. 6 is a kind of flow diagram of the manufacturing method of flexible display panels provided in an embodiment of the present invention；
Fig. 7 is the flow diagram of the manufacturing method of another flexible display panels provided in an embodiment of the present invention.
Specific implementation mode
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limitation of the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Continue as shown in Figure 1, inventor is by carefully studying discovery, there are the flexible substrate layers corresponding to area easily to send out for foreign matter
Raw deformation or fracture, main reason is that, during removing glass substrate, there are areas to be converted into stress concentration point for foreign matter,
Concrete reason, which is the presence of foreign matter, to be caused the stress formed in stripping process discharge in the horizontal direction to be obstructed, and is carried out at foreign matter and exists
Area forms stress concentration point.In order to make glass substrate be completely exfoliated with flexible substrate layer, when the stress of stress concentration point is in water
Square to when can not discharge, it will usually it is converted into the carry out stress release of vertical direction, when the stress release of vertical direction, Yin Bo
The elasticity modulus of glass substrate be far longer than flexible substrate layer elasticity modulus (elasticity modulus of glass substrate is typically larger than 70Gpa,
The elasticity modulus of flexible substrate layer is usually 8~9Gpa), and then flexible substrate layer is caused to deform upon, when flexible substrate layer institute
When the stress born is more than its maximum strain power, then phenomenon of rupture occurs for flexible substrate layer, and then generates dim spot.
For above-mentioned discovery, inventor solves above-mentioned technical problem by following embodiment.
Fig. 2 is a kind of structural schematic diagram of flexible display panels provided in an embodiment of the present invention, and the present embodiment is applicable to
Flexible display apparatus or terminal device situation equipped with the flexible display panels, flexible display panels concrete structure are：
Including array basal plate 1, and the organic luminous layer 2 that is arranged in the array substrate 1, the array substrate 1
Including at least two flexible substrate layers 11, the elasticity modulus of at least two flexible substrate layer is along far from the organic light emission
The direction of layer tapers into gradient.
Specifically, in the embodiment of the present invention, wherein the elasticity modulus of each layer flexible substrate layer can be uniform, different layers
The elasticity modulus of flexible base board be different, and along the direction far from organic luminous layer, the flexible substrate layer of different layers
Elasticity modulus taper into gradient；Or can also be for each layer of flexible substrate layer, elasticity modulus be also each along
Direction far from the organic luminous layer tapers into gradient.
In stripping process, array substrate forms stress in stripping process with hard substrate and releases this kind of flexible display panels
Put, usual foreign matter region is the centrostigma of stress release, when stress transfer to stress concentration point, because of the presence of foreign matter, stress without
Method continues to discharge in horizontal direction, and then stress can be converted into the release of vertical direction, during the release of stress vertical direction, because
Top layer flexible substrate layer (close to organic luminous layer) elasticity modulus is larger, can not deform upon that (i.e. stress is larger in elasticity modulus
The adaptability to changes that can bear of flexible substrate layer it is larger, be not susceptible to deformation), and the flexible substrate layer of bottom is (far from organic hair
Photosphere) elasticity modulus it is smaller, and then preferentially deformed upon under stress, stress is released in bottom flexible substrate layer
Afterwards, the flexible substrate layer of top layer will not be had an impact, so protect top layer flexible substrate layer and top layer flexible substrate layer with
On organic luminous layer, and then avoid producing fracture in organic luminous layer or dim spot.
The technical solution of the present embodiment carries out the release of stress, solution by using the smaller flexible substrate layer of elasticity modulus
It has determined there are under foreign matter state, the technical issues of laser lift-off generates deformation and dim spot, has improved the stability of laser lift-off.
Based on the above technical solution, optionally, the material of the flexible substrate layer 11 is polyimides, and polyamides is sub-
Amine is high-molecular organic material.High temperature resistant is up to 400 DEG C, using flexible substrate layer made of polyimides, in laser irradiation process
In, it can ensure the stability of flexible substrate layer, will not be melted because high-temperature laser irradiates, improve flexible display panels
Heat-resisting quantity.
Based on the above technical solution, optionally, the thickness of the flexible substrate layer 11 is along the flexible base board
The stacking direction of layer changes in gradient.Further, it is less than close to the thickness of the flexible substrate layer of the organic luminous layer separate
The thickness of the flexible substrate layer of the organic luminous layer, by the adjustment of thickness so that flexible substrate layer release and the thickness phase
When the thickness of the stress matched, the flexible substrate layer far from organic luminous layer is larger, more stress can be discharged, alleviate more multiform
Become.
Fig. 3 is shown in the structural schematic diagram of another flexible display panels provided in an embodiment of the present invention, with two flexibilities
For substrate layer, the array substrate 1 includes first flexible substrate layer 101 and second flexible substrate layer 102, and described first is flexible
Substrate layer 101 is between the organic luminous layer 2 and the second flexible substrate layer 102；The first flexible substrate layer 101
Elasticity modulus be more than 5GPa, the elasticity modulus of the second flexible substrate layer 102 is less than 1GPa.In present embodiment, first
The elasticity modulus of flexible substrate layer 101 is far longer than the elasticity modulus of second flexible substrate layer 102, during stress release,
Second flexible substrate layer 102 preferentially deforms upon, and then ensures that first flexible substrate layer 101 is in stable state, that is, ensures the
Organic luminous layer 2 on one flexible substrate layer 101 is in stable state.Further, in present embodiment, wherein first is soft
Property substrate layer 101 the desirable ranging from 5~15GPa of elasticity modulus, if the Elastic Modulus Values of first flexible substrate layer 101 are big
In 15GPa, then the flexibility of flexible display panels may be influenced, and if the Elastic Modulus Values of first flexible substrate layer 101 are less than
5GPa, then first flexible substrate layer 101 be also easy to happen deformation, will influence be located at the first flexible substrate layer 101 on it is organic
The stability of luminescent layer 2.
Optionally, the thickness of the first flexible substrate layer 101 is 1~10 μm, the thickness of the second flexible substrate layer 102
Degree is 10~20 μm.By increasing the thickness of second flexible substrate layer 102, use is so that second flexible substrate layer 102 discharges more
More stress., but the thickness of the second flexible substrate layer 102 is blocked up, first, flexible substrate material can be wasted, second is that can cause soft
The thickness of property display panel is too thick, is unfavorable for the lightening design of display panel, for 101 thickness of first flexible substrate layer, if
Thickness is too thick, can also have the above problem, but the first flexible substrate layer 101 still needs to ensure there is some strength, therefore, by its thickness
Degree range is set as 1~10 μm.
Fig. 4 is the structural schematic diagram of another flexible display panels provided in an embodiment of the present invention, is released applied to being required
In the state that the stress put is larger, the array substrate 1 include third flexible substrate layer 103, the 4th flexible substrate layer 104 and
5th flexible substrate layer 105, the third flexible substrate layer 103 is close to the organic luminous layer, the 5th flexible substrate layer
105 far from the organic luminous layer, and it is soft that the 4th flexible substrate layer 104 is located at the third flexible substrate layer 103 and the 5th
Between property substrate layer 105；The elasticity modulus of the third flexible substrate layer 103 is more than 5GPa, optionally, the described 4th flexible base
The elasticity modulus of plate layer 104 is 1~5GPa, and the elasticity modulus of the 5th flexible substrate layer 105 is less than 1GPa.The third is soft
Property substrate layer 103 1~5 μm of thickness, the thickness of the 4th flexible substrate layer 104 is 5~10 μm, the 5th flexible base board
The thickness of layer 105 is 10~20 μm.
In the present embodiment, array substrate includes three-layer flexible substrate layer, and respectively third flexible substrate layer the 103, the 4th is soft
Property substrate layer 104, the 5th flexible substrate layer 105, wherein the elasticity modulus of third flexible substrate layer 103 be more than 5GPa, optionally,
The elasticity modulus of 4th flexible substrate layer 104 is 1~5GPa, and the elasticity modulus of the 5th flexible substrate layer 105 is less than 1GPa, flexible
The elasticity modulus of substrate layer reduces in gradient, and during stress release, the 5th flexible substrate layer 105 preferentially deforms upon, in
After 5th flexible substrate layer 105 deforms upon, stress is not discharged completely, then by the 4th flexible substrate layer 104 after
Continuous release ensures third flexible substrate layer by 104 2 release stress of the 4th flexible substrate layer so that stress is completely released
103 are in stable state.
Further, in present embodiment, the elasticity modulus of wherein third flexible substrate layer 103 it is desirable ranging from 5~
15GPa may influence the soft of flexible display panels if the Elastic Modulus Values of third flexible substrate layer 103 are more than 15GPa
Property, and if the Elastic Modulus Values of third flexible substrate layer 103 are less than 5GPa, third flexible substrate layer 103 is also easy to happen
Deformation will influence the stability for being located at organic luminous layer 2 on the third flexible substrate layer 103.
In addition, the thickness of the 5th flexible substrate layer 105 is 10~20 μm.Pass through the described in relative increase the 5th flexible base
105 thickness of plate layer, with so that the 5th flexible substrate layer 105 discharges more stress, but the thickness of the 5th flexible substrate layer 105
Thickness is spent, first, flexible substrate material can be wasted, second is that the thickness of flexible display panels can be caused too thick, is unfavorable for display panel
Lightening design, if thickness is too thick, can also have the above problem, but the third for third flexible substrate layer 103 and thickness
Flexible substrate layer 103 still needs to ensure there is some strength, therefore, its thickness range is set as 1~5 μm.
It should be noted that when the stress for needing to be released is larger, the quantity for increasing flexible substrate layer is can also continue to,
To ensure that the flexible substrate layer contacted with organic luminous layer is in stable state, as the particular number of flexible substrate layer, herein
It does not limit, can be increased according to practical operation.
Fig. 5 is the structural schematic diagram of another flexible display panels provided in an embodiment of the present invention, is released applied to being required
In the state that the stress put is larger, unlike the technical solution that is related to from above-described embodiment, the present embodiment passes through in two phases
A stress relief layer is set to realize the release of larger stress between adjacent flexible substrate layer.
Specifically；A kind of flexible display panels, which is characterized in that including array basal plate 1, and be arranged in the array
Organic luminous layer 2 on substrate 1, the array substrate 1 include at least two flexible substrate layers 11, described at least two flexible bases
The elasticity modulus of plate layer 11 tapers into gradient along the direction far from the organic luminous layer 2, wherein at least one setting
Stress relief layer 3 between two adjacent flexible substrate layers 11.Further, the elasticity of the stress relief layer 3
The thickness that modulus is less than 1Gpa or described stress reliefs layer 3 is 1~10 μm.Preferably, the stress relief layer 3 includes organic
Material, preferably, the organic material be polyethylene, polyethylene naphthalate or polyethylene terephthalate or
At least one of polymethyl methacrylate.
The technical solution of the present embodiment, by the way that a stress relief layer is arranged between two flexible substrate layers 11, in separate
When the flexible substrate layer 11 of organic luminous layer 2 cannot discharge stress completely, continue to release stress by stress relief layer, stress without
Method is passed to the flexible substrate layer 11 close to organic luminous layer 2, avoids in stripping process close to the flexibility of organic luminous layer 2
Substrate layer 11 deforms upon, and ensure that the flexible substrate layer 11 close to organic luminous layer 2 stabilizes, and is equivalent to and ensure that organic hair
The stability of photosphere 2.
On above-described embodiment basis, further include that the elasticity modulus of the stress relief layer is less than any one of
The elasticity modulus of the elasticity modulus of flexible substrate layer 11, stress relief layer is minimum, i.e., when stress transfer to stress relief layer, answers
Power relief layer preferentially deforms upon, i.e. stress when flexible substrate layer 11 is not yet had an effect, stress relief layer can immediately by
The stress relief layer of elasticity modulus minimum is arranged in release, in addition to the flexible substrate layer 11 with protection close to organic luminous layer 2 is sent out
, can also be appropriate in stress outside the effect of raw deformation, ensure that all flexible substrate layers 11 avoided deforming upon has
Beneficial effect.
Present invention simultaneously provides a kind of flexible display apparatus, wherein the flexible display panels including any of the above-described.It is flexible
The operation principle of display device is same as above, and is not repeated herein.
Fig. 6 is a kind of flow chart of the production method of flexible display panels provided in an embodiment of the present invention.
The structure of a kind of production method of flexible display panels, wherein flexible PCB may refer to shown in Fig. 2, specific to wrap
It includes,
S101, provide array basal plate, wherein the array substrate include at least two flexible substrate layers, it is described at least
The elasticity modulus of two flexible substrate layers tapers into gradient along far from the organic luminous layer direction；
S102, an organic luminous layer is formed on the array substrate.
Flexible display panels are made by the above method：In stripping process, array substrate was being removed with hard substrate
Form stress release in journey, usual foreign matter region is the centrostigma of stress release, when stress transfer to stress concentration point, because of foreign matter
Presence, stress can not continue to discharge in horizontal direction, and then stress can be converted into the release of vertical direction, stress vertical direction
During release, because top layer flexible substrate layer (close to organic luminous layer) elasticity modulus is larger, it can not deform upon that (i.e. stress exists
The adaptability to changes that the larger flexible substrate layer of elasticity modulus can bear is larger, is not susceptible to deformation), and the flexible substrate layer of bottom
The elasticity modulus of (far from organic luminous layer) is smaller, and then is preferentially deformed upon under stress, and stress is in bottom flexible base
After plate layer is released, the flexible substrate layer of top layer will not be had an impact, and then protect top layer flexible substrate layer and top layer soft
Organic luminous layer more than property substrate layer, and then avoid producing fracture in organic luminous layer or dim spot.
The technical solution of the present embodiment carries out the release of stress, solution by using the smaller flexible substrate layer of elasticity modulus
It has determined there are under foreign matter state, the technical issues of laser lift-off generates deformation and dim spot, has improved the stability of laser lift-off.
Further alternative, the thickness close to the flexible substrate layer of the organic luminous layer is less than far from the organic light emission
The thickness of the flexible base board of layer.The elasticity modulus of flexible substrate layer is adjusted by adjusting the thickness of flexible substrate layer.
Further alternative, the present embodiment is by taking two sheets of flexible substrate layer as an example, and specifically, the array substrate includes the
One flexible substrate layer and second flexible substrate layer, the first flexible substrate layer are located at the organic luminous layer and described second soft
Between property substrate layer；The elasticity modulus of the first flexible substrate layer is more than 5GPa, the springform of the second flexible substrate layer
Amount is less than 1GPa.In present embodiment, the elasticity modulus of first flexible substrate layer is far longer than the elasticity of second flexible substrate layer
Modulus, during stress release, second flexible substrate layer preferentially deforms upon, and then ensures that first flexible substrate layer is in steady
Determine state, that is, ensures that the organic luminous layer on first flexible substrate layer is in stable state.Further, present embodiment
In, ranging from 5~15GPa that wherein elasticity modulus of first flexible substrate layer can use, if the springform of first flexible substrate layer
Measurement value is more than 15GPa, then the flexibility of flexible display panels may be influenced, and if the Elastic Modulus Values of first flexible substrate layer
Less than 5GPa, then first flexible substrate layer is also easy to happen deformation, will influence to be located at organic hair on the first flexible substrate layer
The stability of photosphere.
Further alternative, in the present embodiment, the array substrate includes three-layer flexible substrate layer, specifically, described
Array substrate includes third flexible substrate layer, the 4th flexible substrate layer and the 5th flexible substrate layer, the third flexible base board
Layer is close to the organic luminous layer, and the 5th flexible substrate layer is far from the organic luminous layer, the 4th flexible substrate layer
Between the third flexible substrate layer and the 5th flexible substrate layer；The elasticity modulus of the third flexible substrate layer is more than
The elasticity modulus of 5GPa, the 4th flexible substrate layer are 1~5GPa, and the elasticity modulus of the 5th flexible substrate layer is less than
1GPa。
The elasticity modulus of flexible substrate layer reduces in gradient, and during stress release, the 5th flexible substrate layer is preferentially sent out
Raw deformation, after the 5th flexible substrate layer deforms upon, stress is not discharged completely, then passes through the 4th flexible substrate layer
Release, after the secondary release stress of the 4th flexible substrate layer, usual stress is discharged completely, ensures third flexible substrate layer
In stable state.
Further, in present embodiment, the elasticity modulus of wherein third flexible substrate layer it is desirable ranging from 5~
15GPa may influence the flexibility of flexible display panels if the Elastic Modulus Values of third flexible substrate layer are more than 15GPa, and
If the Elastic Modulus Values of third flexible substrate layer 103 are less than 5GPa, third flexible substrate layer is also easy to happen deformation, will
Influence the stability for being located at organic luminous layer on the third flexible substrate layer.
It should be noted that when the stress for needing to be released is larger, the quantity for increasing flexible substrate layer is can also continue to,
The transmission gradually failed is done to stress by multiple flexible substrate layers, to ensure at the flexible substrate layer contacted with organic luminous layer
It does not limit, can be increased according to practical operation herein as the particular number of flexible substrate layer in stable state.
Fig. 7 is the flow diagram of the production method of another flexible display panels provided in an embodiment of the present invention, and upper
It states unlike embodiment, setting one stress relief layer of the present embodiment between two adjacent flexible substrate layers leads to
Overstress relief layer discharges larger stress, does gradually decline to stress without too many flexible substrate layer and transmits
Realize the release of stress.
A kind of production method of flexible display panels, wherein specific steps include：
Step S201, array basal plate is provided, wherein the array substrate includes at least two flexible substrate layers, described
The elasticity modulus of at least two flexible substrate layers tapers into gradient along far from the organic luminous layer direction；
Step S202, an organic luminous layer is formed on the array substrate.
Wherein, in step S201, the one stress relief layer of setting between two adjacent flexible substrate layers.Yu Yuan
When flexible substrate layer from organic luminous layer cannot discharge stress completely, continue to release stress by stress relief layer, stress without
Method is passed to the flexible substrate layer close to organic luminous layer, avoids the flexible base board close to organic luminous layer in stripping process
Layer deforms upon, and ensure that the flexible substrate layer close to organic luminous layer stabilizes, and is equivalent to and ensure that the steady of organic luminous layer
It is qualitative.
Further alternative, the elasticity modulus of the stress relief layer is less than the elasticity of any one of flexible substrate layer
Modulus.The elasticity modulus of stress relief layer is minimum, i.e., when stress transfer to stress relief layer, shape preferentially occurs for stress relief layer
Become, i.e. stress can be released when flexible substrate layer is not yet had an effect in stress relief layer immediately, and setting elasticity modulus is minimum
Stress relief layer can also be in addition to having the function of protection close to other than the flexible substrate layer of organic luminous layer deforms upon
In the case of stress is appropriate, ensure the advantageous effect that all flexible substrate layers deform upon.
Although various aspects of the invention provide in the independent claim, the other aspects of the present invention include coming from
The combination of the dependent claims of the feature of described embodiment and/or feature with independent claims, and not only
It is the combination clearly provided in claim.
Although it is to be noted here that the foregoing describe the example embodiment of the present invention, these descriptions are not
It should be understood in a limiting sense.It is wanted without departing from such as appended right on the contrary, several change and modification can be carried out
The scope of the present invention defined in asking.
Note that above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The present invention is not limited to specific embodiments described here, can carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out to the present invention by above example
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
May include other more equivalent embodiments, and the scope of the present invention is determined by scope of the appended claims.
Claims (21)
1. a kind of flexible display panels, which is characterized in that including array basal plate, and having in the array substrate is arranged
Machine luminescent layer, the array substrate include at least two flexible substrate layers, and the elasticity modulus of the flexible base board of different layers is not
Together, and along the direction far from the organic luminous layer, the elasticity modulus of the flexible substrate layer of different layers in gradient by
Gradual change is small；
Wherein, the elasticity modulus of each layer flexible substrate layer is uniform, alternatively, the elasticity modulus of each layer flexible substrate layer
It is tapered into gradient each along the direction far from the organic luminous layer.
2. flexible display panels according to claim 1, which is characterized in that the material of the flexible substrate layer is that polyamides is sub-
Amine.
3. flexible display panels according to claim 1, which is characterized in that the thickness of the flexible substrate layer is along described
The stacking direction of flexible substrate layer changes in gradient.
4. flexible display panels according to claim 3, which is characterized in that close to the flexible base board of the organic luminous layer
The thickness of layer is less than the thickness of the flexible substrate layer far from the organic luminous layer.
5. flexible display panels according to claim 1, which is characterized in that the array substrate includes first flexible substrate
Layer and second flexible substrate layer, the first flexible substrate layer be located at the organic luminous layer and the second flexible substrate layer it
Between；The elasticity modulus of the first flexible substrate layer is more than 5GPa, and the elasticity modulus of the second flexible substrate layer is less than 1GPa.
6. flexible display panels according to claim 5, which is characterized in that the thickness of the first flexible substrate layer is 1
~10 μm, the thickness of the second flexible substrate layer is 10~20 μm.
7. flexible display panels according to claim 1, which is characterized in that the array substrate includes third flexible base board
Layer, the 4th flexible substrate layer and the 5th flexible substrate layer, the third flexible substrate layer are described close to the organic luminous layer
For 5th flexible substrate layer far from the organic luminous layer, the 4th flexible substrate layer is located at the third flexible substrate layer and
Between five flexible substrate layers；The elasticity modulus of the third flexible substrate layer is more than 5GPa, the bullet of the 4th flexible substrate layer
Property modulus be 1~5GPa, the elasticity modulus of the 5th flexible substrate layer is less than 1GPa.
8. flexible display panels according to claim 7, which is characterized in that the thickness 1~5 of the third flexible substrate layer
μm, the thickness of the 4th flexible substrate layer is 5~10 μm, and the thickness of the 5th flexible substrate layer is 10~20 μm.
9. according to the flexible display panels described in Claims 1 to 5 any one, which is characterized in that further include：It is at least one to set
Set the stress relief layer between two adjacent flexible substrate layers.
10. flexible display panels according to claim 9, which is characterized in that the stress relief layer includes organic material.
11. flexible display panels according to claim 10, which is characterized in that the organic material is polyethylene, poly- naphthalene
Naphthalate or at least one of polyethylene terephthalate or polymethyl methacrylate.
12. flexible display panels according to claim 11, which is characterized in that the elasticity modulus of the stress relief layer is small
In the elasticity modulus of any one of flexible substrate layer.
13. flexible display panels according to claim 9, which is characterized in that the elasticity modulus of the stress relief layer is small
In 1GPa.
14. flexible display panels according to claim 9, which is characterized in that the thickness of the stress relief layer is 1~10
μm。
15. a kind of flexible display apparatus, which is characterized in that including claim 1~14 any one of them flexible display panels.
16. a kind of production method of flexible display panels, which is characterized in that
Array basal plate is provided；
An organic luminous layer is formed on the array substrate；
Wherein, the array substrate includes at least two flexible substrate layers, and the elasticity modulus of the flexible base board of different layers is not
Together, and along the direction far from the organic luminous layer, the elasticity modulus of the flexible substrate layer of different layers in gradient by
Gradual change is small；
The elasticity modulus of each layer flexible substrate layer is uniform, alternatively, the equal edge of elasticity modulus of each layer flexible substrate layer
The direction far from the organic luminous layer to taper into gradient.
17. the production method of flexible display panels according to claim 16, which is characterized in that
It is less than the thickness of the flexible base board far from the organic luminous layer close to the thickness of the flexible substrate layer of the organic luminous layer
Degree.
18. the production method of flexible display panels according to claim 16, which is characterized in that the array substrate includes
First flexible substrate layer and second flexible substrate layer, the first flexible substrate layer are located at the organic luminous layer and described second
Between flexible substrate layer；The elasticity modulus of the first flexible substrate layer is more than 5GPa, the elasticity of the second flexible substrate layer
Modulus is less than 1GPa.
19. the production method of flexible display panels according to claim 16, which is characterized in that the array substrate includes
Third flexible substrate layer, the 4th flexible substrate layer and the 5th flexible substrate layer, the third flexible substrate layer have close to described
Machine luminescent layer, the 5th flexible substrate layer are located at the third far from the organic luminous layer, the 4th flexible substrate layer
Between flexible substrate layer and the 5th flexible substrate layer；The elasticity modulus of the third flexible substrate layer be more than 5GPa, the described 4th
The elasticity modulus of flexible substrate layer is 1~5GPa, and the elasticity modulus of the 5th flexible substrate layer is less than 1GPa.
20. according to the production method of claim 16~19 any one of them flexible display panels, further include, it is adjacent in two
The flexible substrate layer between one stress relief layer of setting.
21. the production method of flexible display panels according to claim 20, which is characterized in that the stress relief layer
Elasticity modulus is less than the elasticity modulus of any one of flexible substrate layer.
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| CN106710449A (en) * | 2016-12-09 | 2017-05-24 | 京东方科技集团股份有限公司 | Flexible display module and display device |
| US11258043B2 (en) | 2016-12-09 | 2022-02-22 | Boe Technology Group Co., Ltd. | Flexible display module and display device |
| CN106530973B (en) * | 2016-12-21 | 2019-06-11 | 上海天马微电子有限公司 | Curved surface display device |
| CN110650842B (en) * | 2017-06-26 | 2022-05-27 | 富士胶片株式会社 | Composite member and device |
| CN107871453A (en) | 2017-10-31 | 2018-04-03 | 云谷（固安）科技有限公司 | A kind of Flexible Displays module and preparation method thereof |
| CN108400261B (en) | 2018-05-02 | 2020-11-24 | 京东方科技集团股份有限公司 | Flexible display device and manufacturing method thereof |
| CN110556068B (en) * | 2018-05-31 | 2020-12-15 | 京东方科技集团股份有限公司 | Flexible display screen, and bending detection method and device of flexible display screen |
| CN109445626A (en) * | 2018-09-30 | 2019-03-08 | 昆山工研院新型平板显示技术中心有限公司 | Flexible touch module and flexible touching display screen |
| CN109360901B (en) * | 2018-09-30 | 2021-03-05 | 云谷（固安）科技有限公司 | Display device, flexible OLED display panel and manufacturing method thereof |
| CN110098225B (en) * | 2019-04-18 | 2021-06-01 | 武汉华星光电半导体显示技术有限公司 | Flexible display panel and preparation method thereof |
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