CN109411525A - Flexible display panels and preparation method thereof - Google Patents
Flexible display panels and preparation method thereof Download PDFInfo
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- CN109411525A CN109411525A CN201811528103.XA CN201811528103A CN109411525A CN 109411525 A CN109411525 A CN 109411525A CN 201811528103 A CN201811528103 A CN 201811528103A CN 109411525 A CN109411525 A CN 109411525A
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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
- H10K59/40—OLEDs integrated with touch screens
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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
- H10K50/844—Encapsulations
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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
- H10K50/868—Arrangements for polarized light emission
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- 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
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- Electroluminescent Light Sources (AREA)
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Abstract
The present invention provides a kind of flexible display panels and preparation method thereof, wherein the flexible display panels include flexible base board, the light emitting device layer being arranged on the flexible base board, the touch control layer on the upside of the light emitting device layer and the polarizing layer in the touch control layer, the touch control layer and the polarizing layer all have close to mutual side and side away from each other, and the touch control layer and/or polarizing layer side away from each other have posted extra play, the Poisson's ratio of the extra play is negative.The polarizing layer and/or touch control layer of flexible display panels of the present invention side away from each other post the extra play that Poisson's ratio is negative, to change the stress distribution between film layer, so that the adhesive force between polarizing layer and touch control layer increases, the phenomenon that generating film layer separation is avoided, the bent characteristic and service life of flexible display panels are improved.
Description
Technical field
The present invention relates to display panel manufacturing technology fields more particularly to a kind of flexible display panels and preparation method thereof.
Background technique
Organic electroluminescent (OLED) device has the characteristics that low in energy consumption, light, brightness is high, the visual field is wide and reaction is fast, this
Outside, a most prominent feature of OLED device is that by Flexible Displays function, can be widely used in just
It takes in the numerous areas such as formula electronic equipment, wearable electronic equipment, vehicle electronic device.
Flexible OLED devices pass through deposition transparent anode, metal yin generally using polymeric substrates flexible as carrier
It pole and is clipped in two layers or more organic luminous layer between the two and constitutes.The organic luminous layer generally comprise hole injection layer,
Hole transmission layer, luminescent layer, electron transfer layer and electron injecting layer etc..Bending deformed flexible OLED display part is current
Popular developing direction.
With the development of flexible display technologies, flexible display panels using more and more, as shown in Figure 1, Flexible Displays
Panel 100' include stack gradually made of flexible base board 10', light emitting device layer 20', touch control layer 30', POL (Polarizer,
Polaroid) layer 40' and encapsulation cover plate 50'.In practical applications, flexible display panels would generally be bent, when to Flexible Displays
When panel does curling or expansion deformation, the touch control layer 30' of flexible display panels is different from POL layers of 40' material, bends capacity variance
Larger, stress, which constantly applies, to cause 30' and POL layers of 40' separation of touch control layer of OLED device, causes OLED display panel object
Reason and structure on damage and cause to be separated from each other so that the performance of flexible OLED display part is difficult to ensure.
Aiming at the problem that touch control layer and POL layer being bonded to each other in above-mentioned flexible display panels are easily separated from each other, existing skill
One of art solution is that thicker optical cement is coated between touch control layer and POL layers, to increase between two film layers
Binding force, and then reduce a possibility that two film layers separate, however the way can make entire flexible display panels thicken, in turn
So that suffered maximum strain increases in the process of bending, bending stress suffered by each film layer is also opposite to be increased, so that anti-
Only touch control layer and POL layers separation it is ineffective.Another kind solution in the prior art is between touch control layer and POL layers
Increase occlusion structure or increase the roughness on surface, to prevent the two to be separated from each other, but program manufacture craft is more multiple
It is miscellaneous while film shearing strength between layers are difficult to ensure.
Therefore, it is necessary to provide a kind of improved flexible display panels and preparation method thereof to overcome the above problem.
Summary of the invention
The purpose of the present invention is to provide it is a kind of with facilitate production and can effectively avoid touch control layer and POL layer separation
Flexible display panels and preparation method thereof.
For achieving the above object, the present invention provides a kind of flexible display panels comprising flexible base board, setting exist
Light emitting device layer on the flexible base board, the touch control layer on the upside of the light emitting device layer and in the touch control layer
Polarizing layer, the touch control layer and the polarizing layer all have close to mutual side and side away from each other, and the touch-control
Layer and/or polarizing layer side away from each other have posted extra play, and the Poisson's ratio of the extra play is negative.
As a further improvement of the present invention, the extra play is processed to be formed after be attached at the touch control layer or polarizing layer.
As a further improvement of the present invention, the extra play with a thickness of 10 μm~100 μm.
As a further improvement of the present invention, the extra play with a thickness of 10 μm~20 μm.
As a further improvement of the present invention, when the polarizing layer and touch control layer side away from each other are respectively provided with one
When the extra play, each extra play with a thickness of 10 μm~50 μm.
As a further improvement of the present invention, pass through bonding glue-line between the extra play and the touch control layer or polarizing layer
Bonding.
As a further improvement of the present invention, the extra play is honeycomb or slit-type periodic structure.
As a further improvement of the present invention, the substrate of the extra play is PVC, PMMA, FEP, EVA, EMA or PVB.
For achieving the above object, the present invention also provides a kind of preparation methods of flexible display panels comprising such as
Lower step:
Step a: a flexible base board is provided；
Step b: luminescent device is prepared on the flexible base board to form light emitting device layer；
Step c: preparation forms extra play, and the Poisson's ratio of the extra play is negative；
Step d: touch control layer is formed on the light emitting device layer；
Step e: polarizing layer is formed in the upside of the touch control layer；
Wherein, there is step e1 after step c, with step d1 before step d and/or after step e；
The step d1 is to adhere on the extra play on the upside of the light emitting device layer, so that the touching in step d
Control layer is formed on the extra play；
The step e1 is that the extra play is posted on the upside of the polarizing layer.
As a further improvement of the present invention, the extra play is posted after being formed by laser processing by abutted equipment
In the touch control layer and/or polarizing layer side away from each other.
The beneficial effects of the present invention are: the polarizing layer and/or touch control layer of flexible display panels of the present invention it is away from each other one
Side posts the extra play that Poisson's ratio is negative, and is in hyperbolic arch in bending since the Poisson's ratio of extra play is negative, inside is formed
Hollow depression belt, and then active force is applied to its neighbouring polarizing layer or touch control layer so that polarizing layer and touch control layer towards that
This draws close, so that the stress distribution between changing film layer avoids generating film so that the adhesive force between polarizing layer and touch control layer increases
The phenomenon that layer separation, improve the bent characteristic and service life of flexible display panels.
Detailed description of the invention
Fig. 1 is the schematic cross-section of flexible display panels in the prior art.
Fig. 2 is the schematic cross-section of the first preferred embodiment of flexible display panels of the present invention.
Fig. 3 is the schematic cross-section of the second preferred embodiment of flexible display panels of the present invention.
Fig. 4 is the schematic cross-section of the third preferred embodiment of flexible display panels of the present invention.
Fig. 5 is the first structural schematic diagram of the extra play of flexible display panels of the present invention.
Fig. 6 is second of structural schematic diagram of the extra play of flexible display panels of the present invention.
Fig. 7 is the third structural schematic diagram of the extra play of flexible display panels of the present invention.
Specific embodiment
Hereinafter, the present invention will be described in detail with reference to various embodiments shown in the accompanying drawings.But these embodiments are not
The limitation present invention, structure that those skilled in the art are made according to these embodiments, method or change functionally
It changes and is included within the scope of protection of the present invention.
Referring to figure 2. to shown in Fig. 4, flexible display panels 100 of the present invention include flexible base board 10, are arranged in the flexibility
Light emitting device layer 20 on substrate 10, is located in the touch control layer 30 touch control layer 30 on the upside of the light emitting device layer 20
Polarizing layer 40 and cover board 50, the downside of the touch control layer 30 and/or the upside of the polarizing layer 40 have posted extra play 60, institute
The Poisson's ratio for stating extra play 60 is negative.
In the present invention, the flexible base board 10 can be polyimide substrate (PI substrate), polyamide substrate, poly- carbonic acid
The organic polymers substrates such as ester group plate, polyether sulfone substrate, to realize the display function of flexible product.
The light emitting device layer 20 includes but is not limited to the electricity such as electroluminescent cell, liquid crystal display device, organic sensor
Sub- device.The light emitting device layer 20 is formed on the flexible base board 10, can be used what those of ordinary skill in the art knew
Technique is made, not described in detail herein.
The substrate of the touch control layer 30 can be the substrates such as clear polyimides (PI), poly terephthalic acid (PET)；It is described inclined
The flexible substrate of photosphere 40 can be the substrates such as Triafol T (TAC), clear polyimides.
In the present invention, the extra play 60, which first passes through, laser machines, and is then attached again by abutted equipment
In the touch control layer 30 or polarizing layer 40.In this way, being attached again after separately formed extra play 60, in order to make and protect
Demonstrate,prove the thickness and precision of extra play 60.
Further, the extra play 60 with a thickness of 10 μm~100 μm, the thickness of the extra play 60 is excessively thin in technique
On be difficult to realize, membranous layer stability is poor, and its thickness it is blocked up on mould group integral thickness influence it is excessive.In currently preferred reality
Apply in example, the extra play with a thickness of 10 μm~20 μm.
As shown in Fig. 2, in the first preferred embodiment of flexible display panels 100 of the present invention, under the polarizing layer 40
Side and the upside of the touch control layer 30 are respectively provided with an extra play 60, at this point, each extra play 60 with a thickness of 10 μm
~50 μm.
Further, the substrate of the extra play 60 can be PVC (Polyvinyl chloride, polyvinyl chloride), PMMA
(Polymethyl methacrylate, polymethyl methacrylate), FEP (Fluorinated ethylene
Propylene, fluorinated ethylene propylene copolymer), EVA (Ethylene Vinyl Acetate Copolymer, ethyl vinyl acetate
Ethylene copolymer), EMA (ethylene methyl acrylate copolymer) or PVB (Polyvinyl Butyral, polyvinyl butyral),
The extra play 60 is cut by laser machine and laser machine to above-mentioned substrate.
By the selection of the substrate to the extra play 60, hardness to guarantee film layer is higher, light transmittance is good, such as adsorbs dirt
The low equal antifouling property of angstrom property is high, chemical stability is good.In the present embodiment, when the extra play 60 selects PMMA plasticity material
When material, need to carry out cure process to PMMA material, namely plate one layer of hardening bath on the surface of PMMA material, so that its surface
Hardness increases to 5-6H.
It is Nian Jie by bonding glue-line between the extra play 60 and the touch control layer 30 and polarizing layer 40, in the present invention,
The thickness of the bonding glue-line is less than 100 μm, to avoid the whole mould group thickness for increasing flexible display panels 100.
When flexible display panels 100 are bent, no matter touch control layer 30 and the material of polarizing layer 40 are identical or different,
The inside of extra play 60 can all form a hollow depression belt (hyperbolicity characteristic), and then improve the back-supported of extra play 60
Power, to apply active force to its neighbouring polarizing layer 30 or touch control layer 40, so that polarizing layer 30 and touch control layer 40 are leaned on toward each other
Hold together.Specifically, the stress downward to polarizing layer 40 of the extra play 60 above the polarizing layer 40 is located at 30 lower section of touch control layer
Extra play 60 give touch control layer 30 upward stress so that the adhesive force between polarizing layer 40 and touch control layer 30 increases, with
Polarizing layer 40 and touch control layer 30 is avoided to be separated from each other when bending.
In the present embodiment, the polarizing layer 40 and the side away from each other of the touch control layer 30 (namely the polarizing layer
30 downside of 40 upsides and the touch control layer) it is equipped with the extra play 60, the reliability of the flexible display panels 100 is preferable,
Stress distribution can preferably be changed, prevent polarizing layer 40 and touch control layer 30 from separating.
In the present invention, the extra play 60 is that honeycomb or slit-type periodic structure illustrate as shown in Figures 5 to 7
Three kinds of structures of the extra play 60, wherein extra play shown in fig. 5 60 is bow-tie type honeycomb, extra play shown in fig. 6
60 be chiral honeycomb, and extra play 60 shown in Fig. 7 is slit-type periodic structure.
The Poisson's ratio of common plastic film is positive, and is in saddle type when being bent；And extra play 60 of the invention uses honeycomb
Structure or slit-type periodic structure are in hyperbolic arch when being bent, the back-supported power of extra play 60 can be improved, so as to change
Become the stress distribution between polarizing layer 40 and the film layer of touch control layer 30, so that the adhesive force between polarizing layer 40 and touch control layer 30 increases
Add.
When the extra play 60 is bow-tie type honeycomb, Poisson's ratio is -1~-0.1；The extra play 60 is chirality
When honeycomb, Poisson's ratio is -1；When the extra play 60 is slit-type periodic structure, Poisson's ratio is -1.
Fig. 3 illustrates the second preferred embodiment of flexible display panels 100 of the present invention, the knot with the first preferred embodiment
Structure is almost the same, and difference is: in this embodiment, the extra play 60 is only attached at the downside of the touch control layer 30, when soft
Property display panel 100 when being bent, the extra play 60 stress upward to the touch control layer 30 so that the touch control layer 30 to
Polarizing layer 40 is drawn close and the two is avoided to separate.
Compared to the first preferred embodiment, the flexible display panels 100 in the second preferred embodiment are only in touch control layer 30
One layer of extra play 60 is arranged in downside, and light transmittance is higher, and advantage of lower cost.
Fig. 4 illustrates the third preferred embodiment of flexible display panels 100 of the present invention, the difference with the first preferred embodiment
Be: in this embodiment, the extra play 60 only adheres on the upside of the polarizing layer 40, when 100 quilt of flexible display panels
When bending, the extra play 60 gives the polarizing layer 40 downward stress so that polarizing layer 40 draw close to the touch control layer 30 and
It avoids separating.
Fig. 2 to Fig. 4 gives the structural schematic diagram of flexible display panels 100 corresponding to various embodiments of the present invention, in conjunction with
Fig. 2 to Fig. 4 it is found that flexible display panels of the present invention 100 preparation method, include the following steps:
Step a: a flexible base board 10 is provided；
Step b: luminescent device is prepared on the flexible base board 10 to form light emitting device layer 20；
Step c: preparation forms extra play 60, and the Poisson's ratio of the extra play 60 is negative；
Step d: touch control layer 30 is formed on the light emitting device layer 20；
Step e: polarizing layer 40 is formed in the upside of the touch control layer 30；
Wherein, there is step e1 after step c, with step d1 before step d and/or after step e；
The step d1 is that the extra play 60 is adhered on to 20 upside of light emitting device layer, so that the institute in step d
It states touch control layer 30 to be formed on the extra play 60, wherein being first coated with one layer of bonding glue-line on the light emitting device layer 20, recycle
Abutted equipment attaches the extra play 60 on bonding glue-line；
The step e1 is to post the extra play 60 in the upside of the polarizing layer 40.
In addition, the preparation method of flexible display panels 100 of the present invention further includes step f: being formed on the polarizing layer 40
Cover board 50.
Specifically, join shown in Fig. 2, in the first preferred embodiment of the invention, the preparation of the flexible display panels 100
Method includes the following steps:
Step a: a flexible base board 10 is provided；
Step b: luminescent device is prepared on the flexible base board 10 to form light emitting device layer 20；
Step c: preparation forms extra play 60, and the Poisson's ratio of the extra play 60 is negative；
Step d1: posting the extra play 60 in the upside of the light emitting device layer 20, specifically, first in light emitting device layer
20 upper surface is coated with one layer of bonding glue-line, then attaches the extra play 60 on bonding glue-line；
Step d: touch control layer 30 is formed on the extra play 60；
Step e: polarizing layer 40 is formed in the upside of the touch control layer 30；
Step e1: the extra play 60 is posted in the upside of the polarizing layer 40；
Step f: preparation forms cover board 50 on the extra play 60 of 40 upside of polarizing layer.
It in the present embodiment, also can be before step a, b as long as the step c is carried out before step d1
It carries out afterwards or simultaneously, preparation sequence is not recorded as limiting with above-mentioned.
Join shown in Fig. 3, in the second preferred embodiment of the invention, the preparation method packet of the flexible display panels 100
Include following steps:
Step a: a flexible base board 10 is provided；
Step b: luminescent device is prepared on the flexible base board 10 to form light emitting device layer 20；
Step c: preparation forms extra play 60, and the Poisson's ratio of the extra play 60 is negative；
Step d1: the extra play 60 is posted in the upside of the light emitting device layer 20；
Step d: touch control layer 30 is formed on the extra play 60；
Step e: polarizing layer 40 is formed in the upside of the touch control layer 30；
Step f: cover board 50 is formed on the polarizing layer 40.
It is the same with first embodiment, in the present embodiment, as long as the step c is carried out before step d1, system
Standby sequence is not recorded as limiting with above-mentioned.
Join shown in Fig. 4, in third preferred embodiment of the invention, the preparation method packet of the flexible display panels 100
Include following steps:
Step a: a flexible base board 10 is provided；
Step b: luminescent device is prepared on the flexible base board 10 to form light emitting device layer 20；
Step c: preparation forms extra play 60, and the Poisson's ratio of the extra play 60 is negative；
Step d: touch control layer 30 is formed on the light emitting device layer 20；
Step e: polarizing layer 40 is formed in the upside of the touch control layer 30；
Step e1: the extra play 60 is posted in the upside of the polarizing layer 40；
Step f: preparation forms cover board 50 on the extra play 60 of 40 upside of polarizing layer.
Wherein, in the present embodiment, as long as the step c is carried out before step e1, preparation sequence not more than
Record is stated to be limited.
In conclusion flexible display panels 100 and preparation method thereof of the invention, flexible display panels 100 are by inclined
Photosphere 40 and the/side away from each other of touch control layer 30 post the extra play 60 that Poisson's ratio is negative, due to the Poisson of extra play 60
Than being negative, there is hyperbolicity characteristic, be in hyperbolic arch in bending, inside forms hollow depression belt, and then neighbouring to its
Polarizing layer or touch control layer apply active force, so that polarizing layer and touch control layer are drawn close toward each other, thus the stress between changing film layer
Distribution, so that the adhesive force between polarizing layer 40 and touch control layer 30 increases, and then can effectively improve flexible display panels 100 and exist
Easily occur the phenomenon that film layer separation or division in bending process, promote the bent characteristic of flexible display panels 100 and uses the longevity
Life.
It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one
A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say
As a whole, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can for bright book
With the other embodiments of understanding.
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically
Protection scope bright, that they are not intended to limit the invention, it is all without departing from equivalent implementations made by technical spirit of the present invention
Or change should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of flexible display panels, including flexible base board, the light emitting device layer being arranged on the flexible base board, positioned at described
Touch control layer on the upside of light emitting device layer and the polarizing layer in the touch control layer, it is characterised in that: the touch control layer and described
Polarizing layer all has close to mutual side and side away from each other, and the touch control layer and/or polarizing layer are away from each other
Side has posted extra play, and the Poisson's ratio of the extra play is negative.
2. flexible display panels as described in claim 1, it is characterised in that: the extra play is processed to be formed after be attached at it is described
Touch control layer or polarizing layer.
3. flexible display panels as claimed in claim 2, it is characterised in that: the extra play with a thickness of 10 μm~100 μm.
4. flexible display panels as claimed in claim 3, it is characterised in that: the extra play with a thickness of 10 μm~20 μm.
5. flexible display panels as claimed in claim 3, it is characterised in that: when the polarizing layer and the touch control layer deviate from that
When this side is respectively provided with an extra play, each extra play with a thickness of 10 μm~50 μm.
6. flexible display panels as claimed in claim 2 or claim 3, it is characterised in that: the extra play and the touch control layer are inclined
Pass through bonding glue-line bonding between photosphere.
7. flexible display panels as claimed in claim 2, it is characterised in that: the extra play is honeycomb or slit-type week
Phase structure.
8. flexible display panels as claimed in claim 2, it is characterised in that: the substrate of the extra play be PVC, PMMA,
FEP, EVA, EMA or PVB.
9. a kind of preparation method of flexible display panels as claimed in any of claims 1 to 8 in one of claims, it is characterised in that: packet
Include following steps:
Step a: a flexible base board is provided；
Step b: luminescent device is prepared on the flexible base board to form light emitting device layer；
Step c: preparation forms extra play, and the Poisson's ratio of the extra play is negative；
Step d: touch control layer is formed on the light emitting device layer；
Step e: polarizing layer is formed in the upside of the touch control layer；
Wherein, there is step e1 after step c, with step d1 before step d and/or after step e；
The step d1 is to adhere on the extra play on the upside of the light emitting device layer, so that the touch control layer in step d
It is formed on the extra play；
The step e1 is that the extra play is posted on the upside of the polarizing layer.
10. the preparation method of flexible display panels as claimed in claim 9, it is characterised in that: the extra play passes through laser
The touch control layer and/or polarizing layer side away from each other are adhered on by abutted equipment after being process.
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| CN111725269B (en) * | 2020-06-02 | 2022-09-09 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| WO2021243878A1 (en) * | 2020-06-02 | 2021-12-09 | 武汉华星光电半导体显示技术有限公司 | Display panel and manufacturing method therefor |
| US11737344B2 (en) | 2020-06-02 | 2023-08-22 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Display panel and manufacturing method thereof |
| CN111696442B (en) * | 2020-06-17 | 2022-04-01 | 合肥维信诺科技有限公司 | Flexible screen folding cover plate, preparation method thereof and flexible display module |
| CN111696442A (en) * | 2020-06-17 | 2020-09-22 | 合肥维信诺科技有限公司 | Flexible screen folding cover plate, preparation method thereof and flexible display module |
| CN114913775A (en) * | 2022-06-22 | 2022-08-16 | 武汉华星光电半导体显示技术有限公司 | Flexible display module and display device |
| CN114913775B (en) * | 2022-06-22 | 2023-11-28 | 武汉华星光电半导体显示技术有限公司 | Flexible display module and display device |
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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, manufacturing method thereof and display device License type: Common License Record date: 20191030 |
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