CN107331795B - A kind of packaging film, flexible display device and flexible terminal - Google Patents
A kind of packaging film, flexible display device and flexible terminal Download PDFInfo
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- CN107331795B CN107331795B CN201710725596.5A CN201710725596A CN107331795B CN 107331795 B CN107331795 B CN 107331795B CN 201710725596 A CN201710725596 A CN 201710725596A CN 107331795 B CN107331795 B CN 107331795B
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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
- H10K50/8445—Encapsulations multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/311—Flexible OLED
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- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The present invention relates to field of display technology, disclose a kind of packaging film, flexible display device and flexible terminal, the packaging film, for flexible display device, including at least one layer of inorganic film and at least one layer of organic film being alternately superimposed on, wherein, organic film includes: the first organic film and the second organic film that is opposite with un-flexed region and connecting with the first organic film for being covered in bending region, and the Young's modulus of the first organic film is less than the second organic film.In above-mentioned packaging film, it is different from the bending region of flexible display device and the corresponding organic film performance in un-flexed region, wherein, the first organic film for being bent region has lesser Young's modulus, with biggish elongation at break, stress when bending appropriate can be discharged when flexible display device alternating bending, above-mentioned packaging film is made to be not easy to be destroyed, the integrally bending performance of flexible display device is improved, the service life of flexible display device is conducive to extend.
Description
Technical field
The present invention relates to field of display technology, in particular to a kind of packaging film, flexible display device and flexible terminal.
Background technique
OLED (organic electroluminescent) device is considered as most having the flat-panel display device of development potentiality in the present age, while being recognized
For be most may production be in flexible display device display technology.But the life problems of OLED device constrain its production
Industry developing steps inject electrons into transport layer from cathode when OLED device work, in order to improve injection carrier quantity, mention
High-luminous-efficiency, the cathode of OLED use the material of function close with luminescent layer, reduce energy level potential barrier, and this low work function is golden
Belong to, is all inert material such as magnesium, aluminium, silver, easily reacts with water, the oxygen in environment, make component failure.Hole passes simultaneously
Defeated layer (HTL) and electron transfer layer (ETL), it is easy to by the erosion of water, oxygen, cause pixel impaired, device lifetime shortens.Institute
With, encapsulation technology shows particularly important, and effective encapsulation can prevent the immersion of steam and oxygen, organic material aging is prevented,
Extend the OLED device service life.
Thin-film package (Thin Film Encapsulation, TFE) is relied primarily on for the encapsulation reliability of OLED at present
It realizes, the structure of TFE is organic/inorganic multilayer lamination structure, and wherein inorganic layer realizes that barrier water, oxygen effect, organic layer are real
Now planarization effect, but for flexible OLED, alternating bending is carried out to display screen, since inorganic film stress is larger, Young
Modulus is larger, and alternating bending will cause the destruction of the even entire display terminal of encapsulating structure, so, it is badly in need of a kind of suitable flexibility
The encapsulating structure of OLED display device.
Summary of the invention
It is aobvious with flexibility in the packaging film the present invention provides a kind of packaging film, flexible display device and flexible terminal
Show that corresponding organic film performance is different with un-flexed region for the bending region of device, wherein be bent region first is organic
Film layer has lesser Young's modulus, has biggish elongation at break, can be appropriate when flexible display device alternating bending
Release bending when stress, make above-mentioned packaging film be not easy to be destroyed, improve the integrally bending performance of flexible display device,
It is conducive to extend the service life of flexible display device.
In order to achieve the above objectives, the present invention the following technical schemes are provided:
A kind of packaging film, is used for flexible display device, and the flexible display device includes bending region and un-flexed area
Domain, the packaging film include at least one layer of inorganic film being alternately superimposed on and at least one layer of organic film, wherein described organic
Film layer includes:
For being covered in first organic film in the bending region and opposite and with described the with the un-flexed region
The Young's modulus of the second organic film that one organic film connects, first organic film is less than second organic film.
Packaging film provided by the invention, is used for flexible display device, and flexible display device includes bending region and non-curved
Bent region, wherein above-mentioned packaging film includes the inorganic film and organic film being alternately superimposed on, and inorganic film can obstruct steam
And oxygen, prevent above-mentioned flexible display device to be oxidized corrosion, organic film has planarization effect, in addition, organic film includes covering
It is placed on first organic film and second organic film opposite with un-flexed region in bending region, the first organic film and second
Organic film connects, and the Young's modulus of the first organic film, less than the second organic film, be covered in bending region first has
Machine film layer has lesser Young's modulus, has biggish elongation at break, anti-when flexible display device bending, and especially
The first organic film appropriate can discharge curved stress when being bent again, and above-mentioned packaging film is made to be not easy to be destroyed.
In above-mentioned packaging film, organic film corresponding with the bending region of flexible display device and un-flexed region
It can be different, wherein the first organic film for being bent region has lesser Young's modulus, has biggish elongation at break, when
Stress when bending appropriate can be discharged when flexible display device alternating bending, made above-mentioned packaging film be not easy to be destroyed, mentioned
The integrally bending performance for having risen flexible display device, is conducive to extend the service life of flexible display device.
Further, for the inorganic film with a thickness of 1000A~10000A, refractive index is 1.5~2.5.
Further, the inorganic film overlay area includes the viewing area of the flexible display device, and described inorganic
The edge of film layer is more than the edge of display area 0.3mm~2mm.
Further, the organic film is with a thickness of 2 μm~20 μm.
Further, first organic film edge is more than the boundary line in the bending region and the un-flexed region
It extends in the un-flexed region.
Further, in first organic film edge adjacent with second organic film, described first is organic
The handover side of film layer is arranged multiple openings, the handover side of second organic film be equipped with it is multiple with opening one-to-one correspondence and
Chimeric double wedge.
The present invention also provides a kind of flexible display device, including flexible display screen, the flexible display screen includes bending
Region and un-flexed region further include any one packaging film as described in the above technical scheme.
In packaging film in above-mentioned flexible display device, first organic film in the bending region of flexible display screen has
Lesser Young's modulus then has biggish elongation at break, and when flexible display screen alternating bending, the first organic film can be with
Stress when release bending appropriate, makes packaging film be not easy to be destroyed, so that the integrally bending performance of flexible display screen be made to mention
It rises, is conducive to extend the service life of flexible display device provided in an embodiment of the present invention.
Further, the flexible display device further includes the functional layer on the flexible display screen, the function
Layer is bonded by optical cement with the flexible display screen, and the Young's modulus of the optical cement in the bending region is less than described non-curved
The optical cement in bent region.
Further, the functional layer includes touch function layer.
Further, matcoveredn is arranged in the exterior side of the flexible display screen, and the protective layer is sticked by adhesive glue
Young's modulus in the outer surface of the flexible display screen, the adhesive glue in the bending region is less than the viscous of the un-flexed region
Gum deposit.
In addition, the present invention also provides a kind of flexible terminal, including as described in the above technical scheme any one is soft
Property display device.
Detailed description of the invention
Fig. 1 is the local section structural schematic diagram of packaging film provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the opening and double wedge in mode one provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the opening and double wedge in mode two provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the opening and double wedge in mode three provided in an embodiment of the present invention.
Icon: 1- inorganic film；2- organic film；The first organic film of 21-；The second organic film of 22-.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to FIG. 1, packaging film provided in an embodiment of the present invention, is used for flexible display device, flexible display device packet
It includes bending region and un-flexed region, packaging film includes that at least one layer of inorganic film 1 being alternately superimposed on and at least one layer are organic
Film layer 2, wherein organic film 2 includes: for being covered in bending first organic film 21 in region and opposite with un-flexed region
And the second organic film 22 to connect with the first organic film 21, the Young's modulus of the first organic film 21 is less than the second organic film
Layer 22.
Packaging film provided in an embodiment of the present invention, is used for flexible display device, and flexible display device includes bending region
With un-flexed region, wherein above-mentioned packaging film includes the inorganic film 1 and organic film 2 being alternately superimposed on, and inorganic film 1 can
To obstruct steam and oxygen, above-mentioned flexible display device is prevented to be oxidized corrosion, organic film 2 has planarization effect, in addition, organic
Film layer 2 includes the first organic film 21 and second organic film 22 opposite with un-flexed region for being covered in bending region, the
One organic film 21 connects with the second organic film 22, and the Young's modulus of the first organic film 21 is less than the second organic film
22, the first organic film 21 for being covered in bending region has lesser Young's modulus, has biggish elongation at break, when soft
Property display device bending when, and especially alternating bending when the first organic film 21 can the curved stress of release appropriate, make
Above-mentioned packaging film is not easy to be destroyed.
In above-mentioned packaging film, organic film 2 corresponding with the bending region of flexible display device and un-flexed region
Performance is different, wherein the first organic film 21 for being bent region has lesser Young's modulus, has biggish extension at break
Rate appropriate can discharge stress when bending when flexible display device alternating bending, above-mentioned packaging film is made to be not easy to be broken
It is bad, the integrally bending performance of flexible display device is improved, the service life of flexible display device is conducive to extend.
Specifically, 1 thickness of inorganic film can be set to 1000A~10000A, and refractive index can be set to 1.5~2.5.
Specifically, in above-mentioned packaging film, 1 overlay area of inorganic film includes the viewing area of flexible display device, and nothing
The edge of machine film layer 1 is more than edge of display area 0.3mm~2mm.Guarantee that flexible display device is completely covered in the first inorganic film 1
Viewing area guarantees that encapsulation is tight, more effectively stops steam and oxygen, can more effectively protect the aobvious of above-mentioned flexible display device
The function element floor for showing area, is conducive to extend the service life of above-mentioned flexible display device.
Specifically, 2 thickness of organic film can be 2 μm~20 μm.
As shown in Figure 1, wherein in Fig. 1 A-A segment table show in above-mentioned flexible display device two it is adjacent un-flexed interregional
It is bent the corresponding region in region, A '-A ' segment table shows the corresponding region of the first organic film 21 in above-mentioned organic film 2, above-mentioned to have
In machine film layer 2,21 edge of the first organic film is more than that bending region and the boundary line in un-flexed region extend to un-flexed region
It is interior.First organic film, 21 edge be more than flexible display device bending region and un-flexed region boundary line to Flexible Displays
In the un-flexed region of device, i.e., the overlay area of the first organic film 21 is greater than corresponding bending region, avoids first
The boundary of organic film 21 and the second organic film 22 is overlapped with the boundary in bending region and un-flexed region, and it is organic to improve first
The fastness that film layer 21 is connect with the second organic film 22, is conducive to extend the use of packaging film provided in an embodiment of the present invention
Service life, and the first organic film 21 is covered in the intersection in the bending region and un-flexed region of flexible display device, flexibility is aobvious
When showing device bend, the first organic film 21 can suitably discharge answering when bending region is bent with un-flexed region intersection
Power makes above-mentioned film be not easy to be destroyed, and is conducive to the bending property for improving flexible display device.
Specifically, in the first organic film 21 edge adjacent with the second organic film 22, the friendship of the first organic film 21
Edge fit is arranged multiple openings, and the handover side of the second organic film 22 is equipped with multiple with opening one-to-one correspondence and chimeric double wedge.The
By multiple openings and with it, multiple double wedges are chimeric staggeredly correspondingly between one organic film 21 and the second organic film 22
Connection increases the connection area between the first organic film 21 and the second organic film 22, makes the first organic film 21 and second
Organic film 22 connects stronger, stabilization, is conducive to the service life for improving packaging film provided in an embodiment of the present invention.It needs
Bright, the first organic film 21 is staggered with the second organic film 22, comparatively, in fact on the first organic film 21 handover side
Multiple openings are set, form multiple protrusions between two adjacent openings, setting is more on the handover side of the second organic film 22
It is a recessed portion to be formed with the one-to-one double wedge of above-mentioned opening, between two adjacent double wedges and above-mentioned protrusion one-to-one correspondence is embedding
It closes.
Specifically, above-mentioned first organic film 21 joins the double wedge in upper opening and the handover of the second organic film 22
Shape or the first organic film 21 handover when upper protrusion and the second organic film 22 join on recessed portion
The selection mode of shape can there are many, such as:
Mode one
As shown in Fig. 2, the opening that is arranged is rectangular aperture on the first organic film 21 handover side, and the second organic film 22
Handover side on be set to the one-to-one rectangle double wedge of above-mentioned rectangular aperture.Rectangular aperture and rectangle double wedge structure are simple, easily
In preparation.
Mode two
As shown in figure 3, the first organic film 21 handover side on opening include an arc-shaped side and a straight flange, arc-shaped side with
Straight flange connects to forming point of a knife shape opening, and setting corresponds point of a knife shape with above-mentioned point of a knife shape on the handover side of the second organic film 22
Double wedge.Above-mentioned point of a knife shape opening and point of a knife shape double wedge, structure is simple, easily prepared.
Mode three
As shown in figure 4, the handover side portion of protruding above of the first organic film 21 includes circular bulge, the second organic film 22
The circular depression chimeric with above-mentioned circular bulge one-to-one correspondence is arranged in the recessed portion joined on side.Above-mentioned fitting connection side
Formula makes the first organic film 21 join side with the second organic film 22 and contacts completely, connects stronger stabilization.
The embodiment of the invention also provides a kind of flexible display device, including flexible display screen, flexible display screen includes curved
Bent region and un-flexed region, above-mentioned flexible display device further include such as above-mentioned any packaging film as described in the examples.
In packaging film in above-mentioned flexible display device, the first organic film 21 tool in the bending region of flexible display screen
There is lesser Young's modulus, then there is biggish elongation at break, the first organic film 21 when flexible display screen alternating bending
Stress when bending appropriate can be discharged, makes packaging film be not easy to be destroyed, to make the integrally bending of flexible display screen
It can be promoted, be conducive to extend the service life of flexible display device provided in an embodiment of the present invention.
Specifically, above-mentioned flexible display device further includes the functional layer on flexible display screen, and functional layer passes through optics
Glue is bonded with flexible display screen, and the Young's modulus for being bent the optical cement in region is less than the optical cement in un-flexed region.
Above-mentioned functional layer is attached on flexible display screen by optical cement, and the Young's modulus for being bent the optical cement in region is smaller,
With biggish elongation at break, stress when suitably can discharge bending when above-mentioned flexible display device alternating bending makes
Functional layer is not easy to be destroyed, and is also beneficial to improve the bending property of above-mentioned flexible display device.
Specifically, above-mentioned functional layer may include touch function layer.So that above-mentioned flexible display device is had touch function, uses
It is more convenient.
In above-mentioned flexible display device, matcoveredn is arranged in the exterior side of flexible display screen, and protective layer passes through bonding sticker
Set on the outer surface of flexible display screen, the Young's modulus for being bent the adhesive glue in region is less than the adhesive glue in un-flexed region.
Protective layer is arranged in the exterior side of flexible display screen, and protective layer can protect the outer surface of flexible display screen, make flexibility
The outer surface of display screen is not easy to be damaged, and protective layer is pasted onto the outer surface of flexible display screen by adhesive glue, and is bent region
Adhesive glue Young's modulus it is smaller, have biggish elongation at break, can be fitted when above-mentioned flexible display device alternating bending
Stress when discharging bending, makes protective layer be not easy to be destroyed, is conducive to improve flexible display provided in an embodiment of the present invention
The bending property of part.
In addition, the embodiment of the invention also provides a kind of flexible terminals, including such as above-mentioned as described in the examples any one
Kind flexible display device.
Obviously, those skilled in the art can carry out various modification and variations without departing from this hair to the embodiment of the present invention
Bright spirit and scope.In this way, if these modifications and changes of the present invention belongs to the claims in the present invention and its equivalent technologies
Within the scope of, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of packaging film is used for flexible display device, the flexible display device includes being bent region and un-flexed region,
It is characterised in that it includes at least one layer of inorganic film being alternately superimposed on and at least one layer of organic film, wherein the organic film
Include:
For being covered in first organic film in the bending region and opposite and have with described first with the un-flexed region
The Young's modulus of the second organic film that machine film layer connects, first organic film is less than second organic film；
In first organic film edge adjacent with second organic film, the handover side of first organic film is set
Set multiple openings, the handover side of second organic film is equipped with multiple with the opening one-to-one correspondence and chimeric double wedge.
2. packaging film according to claim 1, which is characterized in that the inorganic film with a thickness of 1000A~10000A,
Refractive index is 1.5~2.5.
3. packaging film according to claim 1, which is characterized in that the inorganic film overlay area includes the flexibility
The viewing area of display device, and the edge of the inorganic film is more than the edge of display area 0.3mm~2mm.
4. packaging film according to claim 1, which is characterized in that the organic film is with a thickness of 2 μm~20 μm.
5. packaging film according to claim 1, which is characterized in that first organic film edge is more than the bending
The boundary line in region and the un-flexed region extends in the un-flexed region.
6. a kind of flexible display device, including flexible display screen, the flexible display screen includes being bent region and un-flexed region,
It is characterized in that, further including packaging film as described in any one in claim 1-5.
7. flexible display device according to claim 6, which is characterized in that further include being set on the flexible display screen
Functional layer, the functional layer are bonded by optical cement with the flexible display screen, and the Young of the optical cement in the bending region
Modulus is less than the optical cement in the un-flexed region.
8. flexible display device according to claim 7, which is characterized in that the functional layer includes touch function layer.
9. flexible display device according to claim 6, which is characterized in that the exterior side of the flexible display screen is provided with
Protective layer, the protective layer are attached at the outer surface of the flexible display screen, the adhesive glue in the bending region by adhesive glue
Young's modulus be less than the un-flexed region adhesive glue.
10. a kind of flexible terminal, which is characterized in that including flexible display device as claim in any one of claims 6-9.
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| CN201710725596.5A CN107331795B (en) | 2017-08-22 | 2017-08-22 | A kind of packaging film, flexible display device and flexible terminal |
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| CN201710725596.5A CN107331795B (en) | 2017-08-22 | 2017-08-22 | A kind of packaging film, flexible display device and flexible terminal |
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| CN107331795A CN107331795A (en) | 2017-11-07 |
| CN107331795B true CN107331795B (en) | 2019-02-22 |
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