CN108110037A - Flexible display screen - Google Patents
Flexible display screen Download PDFInfo
- Publication number
- CN108110037A CN108110037A CN201711498712.0A CN201711498712A CN108110037A CN 108110037 A CN108110037 A CN 108110037A CN 201711498712 A CN201711498712 A CN 201711498712A CN 108110037 A CN108110037 A CN 108110037A
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- Prior art keywords
- electrode layer
- layer
- anode
- recessed portion
- flexible display
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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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
- H10K50/805—Electrodes
- H10K50/81—Anodes
- H10K50/813—Anodes characterised by their shape
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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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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
A kind of flexible display screen provided in an embodiment of the present invention includes：Anode electrode layer；And it is enclosed in the pixel confining layers at anode electrode layer edge；Wherein, anode electrode layer includes being located at the anode recessed portion with pixel confining layers intersection.Flexible display screen provided in an embodiment of the present invention, by setting the anode recessed portion being located at pixel confining layers intersection on anode electrode layer, so that the stress distribution of intersection is in anode recessed portion, the stress concentration being located on anode electrode layer with the intersection of pixel confining layers can be alleviated to a certain extent, the surface of anode electrode layer is avoided the deformations such as protrusion or bubbling occur, so as to influence display effect.
Description
Technical field
The present invention relates to display technology fields, and in particular to a kind of flexible display screen.
Background technology
At present, the thicknesses of layers of the pixel isolation layer of flexible display screen is far longer than the thicknesses of layers of organic luminescent layer.When
When flexible display screen folds, showing for layering is susceptible between the negative electrode layer and organic luminous layer of organic light emission layer surface
As the display of flexible display screen is caused to be failed.
The content of the invention
In view of this, an embodiment of the present invention provides a kind of flexible display screen, when solving above-mentioned flexible display screen and folding,
Between negative electrode layer and organic luminous layer easily layering etc. technical problems.
A kind of flexible display screen that one embodiment of the invention provides includes：
Anode electrode layer；And
It is enclosed in the pixel confining layers at the anode electrode layer edge；
Wherein, the anode electrode layer includes being located at the anode recessed portion with the pixel confining layers intersection.
Wherein, a part for the anode recessed portion is covered by the pixel confining layers.
Wherein, which further comprises：
The organic luminous layer for being superimposed upon on the anode electrode layer and being surrounded by the pixel confining layers；The organic light emission
Layer includes the organic luminous layer recessed portion being superimposed upon in the anode recessed portion.
Wherein, which further comprises：
It is covered in the negative electrode layer of the pixel confining layers and the organic light emission layer surface；The negative electrode layer bag
Include the first recessed portion of negative electrode layer being superimposed upon on the organic luminous layer recessed portion.
Wherein, which further comprises：
The negative electrode layer being covered in the pixel confining layers；Wherein, the pixel confining layers include being absorbed in the sun
3rd recessed portion of pole recessed portion, the negative electrode layer include the negative electrode layer first being superimposed upon on the 3rd recessed portion
Recessed portion.
Wherein, which further comprises：
In the pixel confining layers, the support column with the negative electrode layer homonymy, the negative electrode layer covering
The support column.
Wherein, which further comprises：
In pixel confining layers, the support column has sunk area, and the negative electrode layer includes being superimposed upon described recessed
Fall into the second recessed portion of negative electrode layer in region.
Wherein, the material of the anode electrode layer may include one or more of following material：Tin indium oxide, indium oxide
Zinc, indium oxide zinc-tin, tin oxide and graphene.
Wherein, the thickness of the negative electrode layer is no more than 0.01 μm.
Wherein, which further comprises：
The planarization layer being arranged below the anode electrode layer, the planarization layer include being correspondingly arranged at the anode
Planarization layer recessed portion below recessed portion.
Wherein, the flexible display screen further comprises：
It is arranged on the display driving module being electrically connected below the planarization layer with the anode electrode layer.
Wherein, the display driving module includes grid, the covering gate surface or is arranged below the grid
Channel layer, the source electrode being connected with the channel layer and drain electrode, the source electrode or the drain electrode electrically connect with the anode electrode layer
It connects.
A kind of flexible display screen provided in an embodiment of the present invention is limited by setting to be located on anode electrode layer with pixel
The anode recessed portion of layer intersection when flexible display screen is bent, is located at and pixel confining layers on anode electrode layer
Intersection stress concentration, compared with being not provided with anode recessed portion, when being not provided with anode recessed portion, stress concentration anode electricity
It is located at the point of interface with pixel confining layers on the layer of pole, and in embodiments of the present invention, the stress distribution of the intersection is recessed in anode
In concave portion, the stress concentration being located on anode electrode layer with the intersection of pixel confining layers can be alleviated to a certain extent, kept away
There are the deformations such as protrusion or bubbling in the surface for exempting from anode electrode layer, so as to influence display effect.
Description of the drawings
Fig. 1 show a kind of structure diagram of flexible display screen of one embodiment of the invention offer.
Fig. 2 show a kind of structure diagram of flexible display screen of one embodiment of the invention offer.
Fig. 3 show a kind of structure diagram of flexible display screen of one embodiment of the invention offer.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained without making creative work
Example is applied, belongs to the scope of protection of the invention.
Fig. 1 show a kind of structure diagram of flexible display screen of one embodiment of the invention offer.
With reference to figure 1, which includes anode electrode layer 3；It is enclosed in the pixel confining layers at 3 edge of anode electrode layer
4.Wherein, anode electrode layer 3 includes being located at the anode recessed portion 31 with 4 intersection of pixel confining layers.Anode recessed portion 31 can be with
The groove structure on 3 surface of anode electrode layer is formed at, such as rectangular channel or dovetail groove；31 inner anode electrode layer 3 of anode recessed portion
Thickness can be uniform or non-uniform.Anode recessed portion 31 can be made by the method for etching, can also
It is made by the method for deposition.Anode electrode layer 3 can be with 4 partial stack of pixel confining layers, it being understood, however, that the present invention is real
Example is applied to be not especially limited the shape of anode recessed portion 31, it is whether equal to the thickness of 31 inner anode electrode layer 3 of anode recessed portion
It is even to be also not especially limited, the production method of anode recessed portion 31 is also not especially limited, anode electrode layer 3 and pixel are limited
Given layer 4 is also not construed as limiting with the presence or absence of overlap-add region.
In one embodiment, the material of anode electrode layer 3 can be tin indium oxide (ITO), indium zinc oxide (IZO), indium oxide
One or more combinations in the transparent conductive materials such as zinc-tin (ITZO), tin oxide (TO) or graphene, due to above-mentioned material
Can not only be conductive and be transparent material, it is penetrated convenient for light, therefore can be used for the preparation of anode electrode layer 3.It however should
Understand, the material of anode conductive layer 3 is without being limited thereto, and anode electrode layer 3 can be made of one kind in above-mentioned material, can also lead to
Cross several anode electrode layers 3 for being combined multi-layer film structure in above-mentioned material, can also be other electrically conducting transparent materials, this hair
Bright embodiment is not especially limited the material of anode conductive layer 3.
The flexible display screen of the embodiment of the present invention is had a common boundary by setting to be located on anode electrode layer 3 with pixel confining layers 4
The anode recessed portion 31 at place when flexible display screen is bent, is located at and pixel confining layers 4 on anode electrode layer 3
The stress concentration of intersection, compared with being not provided with anode recessed portion 31, when being not provided with anode recessed portion 31, stress concentration is in anode
It is located at the point of interface with pixel confining layers 4 on electrode layer 3, and in embodiments of the present invention, the stress distribution of the intersection is in sun
In pole recessed portion 31, the stress being located on anode electrode layer 3 with the intersection of pixel confining layers 4 can be alleviated to a certain extent
It concentrates, the surface of anode electrode layer 3 is avoided the deformations such as protrusion or bubbling occur, so as to influence display effect.
In one embodiment, the default bending region of flexible display screen can include above-mentioned at least one anode recessed portion
31.It so can be very good to alleviate the bending stress in the default bending region of flexible display screen, avoid in the region due to sun
It is located at and display defect caused by the stress concentration of the intersection of pixel confining layers 4 on pole electrode layer 3.
In one embodiment, pixel confining layers 4 and the side of 3 intersection of anode electrode layer can have the gradient,
When flexible display screen is bent, the bending stress for coming from pixel confining layers 4 can be caused to successively decrease along gradient direction, into one
Step alleviates pixel confining layers 4 and the bending stress of 3 intersection of anode electrode layer when phase flexible display screen bend, while
It can facilitate and other functional film layers are prepared on the surface of anode electrode layer 3, such as：The films such as organic luminous layer 7, negative electrode layer 6
Layer.
In one embodiment, a part for anode recessed portion 31 is covered by pixel confining layers 4.For limits reduce
The stress concentration of anode electrode layer 3, anode recessed portion 31 should be wider and shallower, and anode recessed portion 31 is more big more advantageously reduces
Stress concentration, however exposed anode recessed portion 31 crosses conference influences light-emitting area, therefore, allows 4 covering part of pixel confining layers
Anode recessed portion 31 can not so influence the light-emitting area of flexible display screen, while anode recessed portion 31 is not limited by pixel
The part that given layer 4 covers, which can facilitate, is superimposed other functional film layers, such as：The film layers such as organic luminous layer 7, negative electrode layer 6, from
And the stress concentration of anode electrode layer 3 can be alleviated.Avoid the display defect caused by stress concentration.
Fig. 2 show a kind of structure diagram of flexible display screen of one embodiment of the invention offer.
With reference to figure 2, in one embodiment, which further comprises：It is superimposed upon on anode electrode layer 3 by picture
The organic luminous layer 7 that plain confining layers 4 are surrounded；It is recessed that organic luminous layer 7 includes the organic luminous layer being superimposed upon in anode recessed portion 31
Concave portion 71.By setting organic luminous layer recessed portion 71, on the one hand the display area of organic luminous layer 7 can be extended to organic
Luminescent layer recessed portion 71 adds the display area of organic luminous layer 7.It on the other hand, can be with organic luminous layer 7 and anode electrode
The stress concentration of 3 intersection of layer, avoids the fracture of organic luminous layer 7 or organic luminous layer 7 caused by stress concentration
The defects of with the separation of anode electrode layer 3.
In one embodiment, organic luminous layer recessed portion 71 is only superimposed upon anode recessed portion 31 and is not limited by pixel
In the concave region that layer 4 is covered.It should be appreciated, however, that the embodiment of the present invention is recessed in anode to organic luminous layer recessed portion 71
Specific location in concave portion 31 is not construed as limiting.
In one embodiment, flexible display screen further comprises：It is covered in 7 table of pixel confining layers 4 and organic luminous layer
The negative electrode layer 6 in face；The negative electrode layer first that negative electrode layer 6 includes being superimposed upon on organic luminous layer recessed portion 71 is recessed
Portion 61.The shape of the first recessed portion of negative electrode layer 61 can be identical with the shape of organic luminous layer recessed portion 71, can also be with
The shape of organic luminous layer recessed portion 71 is different, when the shape of the first recessed portion of negative electrode layer 61 and organic luminous layer recessed portion
When 71 shape is identical, after organic luminous layer recessed portion 71 is prepared, the first recessed portion of negative electrode layer 61 is directly superimposed system
The shape of the standby organic luminous layer recessed portion 71 that can get off in corresponding position " duplication ", and without passing through special figure chemical industry
Skill forms the first recessed portion of negative electrode layer 61, so as to simplify preparation process.It should be appreciated, however, that the embodiment of the present invention pair
Whether the first recessed portion of negative electrode layer 61 is identical with the shape of organic luminous layer recessed portion 71 to be not especially limited.Cathode electrode
The thickness of the first recessed portion 61 of layer can be uniform, also can be in uneven thickness；The thickness of organic luminous layer recessed portion 71 can be uniform,
It also can be in uneven thickness.It can be with when the thickness of the first recessed portion of negative electrode layer 61 or organic luminous layer recessed portion 71 is uniform
Facilitate making, for example, when being made using evaporation process, it is recessed which can be formed by a coating technique
Concave portion 61 or organic luminous layer recessed portion 71.
In embodiments of the present invention, thickness ratio of negative electrode layer 6 itself is relatively thin, is usually no more than 0.01 μm.Work as flexibility
When display screen is powered, the hole that anode electrode layer 3 exports is combined in organic luminous layer 7 with the electronics that negative electrode layer 6 exports,
Thus can flexible display screen be shone, the light that flexible display screen is sent can be penetrated through anode electrode layer 3 or negative electrode layer 6
Go out.It will be appreciated, however, that the embodiment of the present invention does not make specifically the structure of flexible display screen and the thickness of negative electrode layer 6
It limits.
Fig. 3 show a kind of structure diagram of flexible display screen of one embodiment of the invention offer.
With reference to figure 3, in one embodiment, pixel confining layers 4 include the pixel confining layers for being superimposed upon anode recessed portion 31
Recessed portion 41, negative electrode layer 6 include the first recessed portion of negative electrode layer 61 being superimposed upon on pixel confining layers recessed portion 41.When
When flexible display screen is bent, due to main region of stress concentration of the anode recessed portion 31 as the flexible display screen, because
This organic luminous layer 7 does not extend to the anode recessed portion 31, can so prevent organic caused by being concentrated due to cathode
The defects of fracture of luminescent layer 7 or the separation of organic luminous layer 7 and anode electrode layer 3.
In one embodiment, which can further comprise：In pixel confining layers 4, with cathode electrode
At least two support columns 5 of 6 homonymy of layer, wherein, support column 5 can be the lug boss of insulating materials, be superimposed upon pixel confining layers 4
On, by setting the film that support column 5 can increase negative electrode layer 6 long.In embodiments of the present invention, negative electrode layer 6 covers
At least two support columns 5.Since negative electrode layer 6 is integrally formed on the surface of an out-of-flatness, i.e. organic luminous layer 7
The surface that the upper surface of upper surface, the upper surface of pixel confining layers 4 and support column 5 is formed by connecting simultaneously out-of-flatness.Therefore, cathode
The surface of electrode layer 6 is also and uneven.The double-layer structure that particularly support column 5 is formed with pixel confining layers 4 can cause cathode electric
Pole layer 6 and the film layer (organic luminous layer 7 or pixel confining layers 4) being engaged with it are bad with reference to power, when flexible display screen generation is curved
During folding, the defects of meeting and the film layer being engaged with it separate.In embodiments of the present invention, the quantity of support column 5 be arranged to
It is 2 few, it can so increase the engagement of negative electrode layer 6 and support column 5, reduce because engagement deficiency comes off herein, so as to cause
The defects of layering or disengaging of negative electrode layer 6 and organic luminous layer 7.
In one embodiment, which can further comprise：Recess between two neighboring support column 5
Region, negative electrode layer 6 include the second recessed portion of negative electrode layer 62 being superimposed upon in sunk area.Negative electrode layer second is recessed
Concave portion 62 is superimposed upon sunk area in a manner of embedded, can extend the length of negative electrode layer 6, increase negative electrode layer 6 with
The fitting area of support column 5.When flexible display screen is bent, it is possible to reduce because negative electrode layer 6 and support column 5 first come off
After negative electrode layer 5 is caused to be separated with organic luminous layer 6.Increase the warping resistance ability of flexible display screen, add cathode
The overall impedance of electrode layer 6 improves the display performance of flexible display screen.
In one embodiment, which further comprises：It is arranged on the planarization layer of 3 lower section of anode electrode layer
2, generally organic insulation material, for forming flat surface, convenient for the preparation of subsequent film.Planarization layer 2 includes corresponding to
It is arranged on the planarization layer recessed portion 21 of 31 lower section of anode recessed portion.In technique anode is made on planarization layer 2 is arranged on
Recessed portion 31 is easier to realize, for example, being prepared by the method for deposition.In addition if sun is only set on anode electrode layer 3
Pole recessed portion 31, anode recessed portion 31 are generally prepared by the method for etching, can so make the thicknesses of layers of anode recessed portion 31
It is uneven, it, can be with so as to influence the intensity of anode electrode layer 3, therefore by setting planarization layer recessed portion 21 in planarization layer 2
So that the thickness of entire anode electrode layer 3 is uniform, the intensity of anode electrode layer 3 is not influenced.
In one embodiment, which can further comprise being arranged on 2 lower section of planarization layer and anode electrode
The 3 display driving module being electrically connected layer by layer, display driving module can be TFT devices (film transistor device), display driving
Module controls organic luminous layer 7 to send the display light of different colours for driving organic luminous layer 7, such as red display light, indigo plant
Color shows that light or green show light.
In one embodiment, display driving module may include grid (not shown), covering gate surface or setting
Square channel layer (not shown) and the source electrode being connected on channel layer and with channel layer and drain electrode 1 under the gate.Its
In, source electrode or drain electrode 1 are electrically connected with anode electrode layer 7.So as to facilitate the external drive circuit of flexible display screen aobvious to flexibility
The control of display screen.The display driving module of such structure has many advantages, such as high-responsivity, high contrast, light, thin and low-power consumption.
It should be appreciated, however, that the embodiment of the present invention is not construed as limiting the concrete structure of display driving module.
In addition, it is to be understood that sunk area described herein be not limited in above-described embodiment by support column it
Between formed, it will be appreciated by persons skilled in the art that at least one support column, can be formed by way of punching.
It should be appreciated that the first and second grade determiners mentioned in the embodiment of the present invention, just to more clearly describe
The technical solution of the embodiment of the present invention uses, can not be limiting the scope of the invention.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Within god and principle, any modification for being made, equivalent substitution etc. should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of flexible display screen, which is characterized in that including：
Anode electrode layer；And
It is enclosed in the pixel confining layers at the anode electrode layer edge；
Wherein, the anode electrode layer includes being located at the anode recessed portion with the pixel confining layers intersection.
2. flexible display screen according to claim 1 a, which is characterized in that part for the anode recessed portion is by the picture
Plain confining layers covering.
3. flexible display screen according to claim 1 or 2, which is characterized in that further comprise：
The organic luminous layer for being superimposed upon on the anode electrode layer and being surrounded by the pixel confining layers；The organic luminous layer bag
Include the organic luminous layer recessed portion being superimposed upon in the anode recessed portion.
4. flexible display screen according to claim 3, which is characterized in that further comprise：
It is covered in the negative electrode layer of the pixel confining layers and the organic light emission layer surface；The negative electrode layer includes folded
The first recessed portion of negative electrode layer being added on the organic luminous layer recessed portion.
5. flexible display screen according to claim 4, which is characterized in that further comprise：
In the pixel confining layers, the support column with the negative electrode layer homonymy, described in negative electrode layer covering
Support column.
6. flexible display screen according to claim 5, which is characterized in that further comprise：Positioned at positioned at pixel confining layers
On, the support column has a sunk area, and the negative electrode layer includes the negative electrode layer being superimposed upon in the sunk area the
Two recessed portions.
7. according to any flexible display screens of claim 4-6, which is characterized in that the material of the anode electrode layer can
Including one or more of following material：Tin indium oxide, indium zinc oxide, indium oxide zinc-tin, tin oxide and graphene.
8. flexible display screen according to claim 1, which is characterized in that further comprise：
The planarization layer being arranged below the anode electrode layer, the planarization layer include being correspondingly arranged at the anode recess
Planarization layer recessed portion below portion.
9. flexible display screen according to claim 8, which is characterized in that further comprise：It is arranged on the planarization layer
The display driving module that lower section is electrically connected with the anode electrode layer.
10. flexible display screen according to claim 9, which is characterized in that the display driving module includes grid, covering
The gate surface or channel layer being arranged below the grid, the source electrode being connected with the channel layer and drain electrode, the source
Pole or the drain electrode are electrically connected with the anode electrode layer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711498712.0A CN108110037B (en) | 2017-12-29 | 2017-12-29 | Flexible display screen |
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|---|---|---|---|
| CN201711498712.0A CN108110037B (en) | 2017-12-29 | 2017-12-29 | Flexible display screen |
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| CN108110037A true CN108110037A (en) | 2018-06-01 |
| CN108110037B CN108110037B (en) | 2020-09-04 |
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| CN109148520A (en) * | 2018-08-06 | 2019-01-04 | 云谷（固安）科技有限公司 | display module and display screen |
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| CN109285863B (en) * | 2018-08-30 | 2020-12-04 | 云谷（固安）科技有限公司 | Flexible display panel, preparation method thereof and display device |
| CN109378328A (en) * | 2018-09-28 | 2019-02-22 | 云谷（固安）科技有限公司 | OLED display panel and OLED display |
| WO2020062775A1 (en) * | 2018-09-30 | 2020-04-02 | 昆山国显光电有限公司 | Display panel, display screen, and display terminal |
| CN109461762A (en) * | 2018-10-12 | 2019-03-12 | 云谷（固安）科技有限公司 | Flexible display panels and preparation method thereof, display device |
| CN109461762B (en) * | 2018-10-12 | 2020-10-02 | 云谷（固安）科技有限公司 | Flexible display panel, manufacturing method thereof and display device |
| CN110406266A (en) * | 2019-08-30 | 2019-11-05 | 昆山国显光电有限公司 | Inkjet-printing device and inkjet printing methods |
| CN111564484A (en) * | 2020-05-22 | 2020-08-21 | 云谷（固安）科技有限公司 | Display panel, processing method thereof and display device |
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