CN108258150A - Flexible oled display - Google Patents
Flexible oled display Download PDFInfo
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- CN108258150A CN108258150A CN201810054291.0A CN201810054291A CN108258150A CN 108258150 A CN108258150 A CN 108258150A CN 201810054291 A CN201810054291 A CN 201810054291A CN 108258150 A CN108258150 A CN 108258150A
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- additional layers
- oled display
- adhesion strength
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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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Abstract
The present invention provides a kind of flexible OLED displays, introduce additional layers, so that in the flexible OLED display, it is interior or appear between the film layer that the additional layers and the additional layers directly connect to appear in the additional layers for the position of adhesion strength minimum between film layer；Or, so that the adhesion strength between cathode and additional layers is less than the adhesion strength between cathode and organic function layer, flexible OLED display is in folding or curly course, film layer separation easily occurs in the small position of adhesion strength, the position that film layer occurs and detaches is controlled by the additional layers herein, it avoids to cause impaired film layer that film layer separation occurs, so as to avoid the problem that/reduce flexible OLED display failure, improves the q＆r of flexible OLED display.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of flexible OLED display.
Background technology
OLED display (Organic Light Emitting Display, organic light emitting diode display) is as use
Equipment is shown in the next generation of moving electronic components and is concerned.If however, OLED display use substrate of glass, because
It is poor for its fragility and flexibility, and it is not readily portable, so as to limit the development of OLED display to a certain extent.Therefore make
Flexible OLED display is had developed with flexible substrates (for example, plastics), flexible OLED display has preferable flexibility, and
And can fold or wind, consequently facilitating the defects of carrying, compensating for common OLED display.
But in folding or curly course flexible OLED display easily occurs for existing flexible OLED display
The problem of failure.
Invention content
The purpose of the present invention is to provide a kind of flexible OLED display, to solve flexible OLED display in the prior art
The problem of easily failing in folding or curly course.
In order to solve the above technical problems, the present invention provides a kind of flexible OLED display, the flexible OLED display packet
Include the additional layers of flexible substrates and the covering flexible substrates, in the flexible OLED display, adhesion strength between film layer
Minimum position appears in the additional layers or appears in the additional layers and the additional layers directly connect
Between film layer.
Optionally, in the flexible OLED display, the flexible OLED display further includes the covering flexibility
The cathode of the anode of substrate, the organic function layer of the covering anode and the covering organic function layer, the additional layers cover
It covers the cathode and directly connects with the cathode.
Optionally, in the flexible OLED display, the flexible OLED display further includes encapsulated layer, the envelope
Dress layer covers the additional layers and directly connects with the additional layers.
Optionally, in the flexible OLED display, the flexible substrates include viewing area and non-display area, described
Additional layers only cover the part of the viewing area.
Optionally, in the flexible OLED display, the additional layers are formed by evaporation process, described additional
The material of film layer is selected from organic material or inorganic material.
The present invention also provides a kind of flexible OLED display, the flexible OLED display includes flexible substrates, covering institute
State the anode of flexible substrates, the organic function layer of the covering anode, the cathode of the covering organic function layer, the described the moon of covering
The encapsulated layer of the additional layers of pole and the covering additional layers, wherein, the cathode respectively with the organic function layer and institute
It states additional layers directly to connect, the additional layers also directly connect with the encapsulated layer；The cathode and the additional layers
Between adhesion strength be less than adhesion strength between the cathode and the organic function layer and/or, the encapsulated layer and described attached
Adhesion strength between blooming layer is less than the adhesion strength between the cathode and the organic function layer.
Optionally, in the flexible OLED display, the adhesion strength between the cathode and the additional layers is also
And/or, the adhesion strength between the encapsulated layer and the additional layers is less than institute less than the adhesion strength in the organic function layer
State the adhesion strength in organic function layer.
Optionally, in the flexible OLED display, the organic function layer also directly connects with the anode, institute
State adhesion strength between cathode and the additional layers be less than the organic function layer and the direct adhesion strength of the anode and/
Or, the adhesion strength between the encapsulated layer and the additional layers is less than the adherency between the organic function layer and the anode
Power.
Optionally, in the flexible OLED display, the flexible substrates include viewing area and non-display area, described
Additional layers only cover the part of the viewing area.
Optionally, in the flexible OLED display, the additional layers are formed by evaporation process, described additional
The material of film layer is selected from organic material or inorganic material.
Inventor the study found that existing flexible OLED display in folding or curly course, easily in organic work(
Film layer separation occurs for interface that ergosphere and cathode connect, since this film layer separation at two will result directly in flexible OLED display
Function the problem of being damaged, failing so as to cause flexible OLED display.
Therefore, in flexible OLED display provided by the invention, additional layers are introduced so that in the flexibility OLED
In display, between film layer the position of adhesion strength minimum appear in the additional layers or appear in the additional layers and
Between the film layer that the additional layers directly connect；Or so that adhesion strength between cathode and additional layers be less than cathode and
Adhesion strength between organic function layer, flexible OLED display is in folding or curly course, easily in the small position of adhesion strength
Put and film layer separation occur, control the position that film layer occurs and detaches by the additional layers herein, avoid can causing function by
Film layer separation occurs for the film layer of damage, so as to avoid the problem that/reduce flexible OLED display failure, improves flexible OLED
The q＆r of display.
Description of the drawings
Fig. 1 is the structure diagram of the flexible OLED display of the embodiment of the present invention one；
Fig. 2 is the structure diagram of the flexible OLED display of the embodiment of the present invention two；
Wherein,
100- flexible OLED displays；110- flexible substrates；120- additional layers；130- anodes；140- organic function layers；
150- cathodes；160- encapsulated layers；
200- flexible OLED displays；210- flexible substrates；220- anodes；230- organic function layers；240- cathodes；250-
Additional layers；260- encapsulated layers；
Specific embodiment
Flexible OLED display proposed by the present invention is described in further detail below in conjunction with the drawings and specific embodiments.
According to following explanation and claims, advantages and features of the invention will become apparent from.It should be noted that attached drawing is using very
Simplified form and using non-accurate ratio, only for the purpose of facilitating and clarifying the purpose of the embodiments of the invention.
The core concept of the present invention is, provides a kind of flexible OLED display, introduces additional layers so that described
In flexible OLED display, the position of adhesion strength minimum appears in the additional layers or appears in described attached between film layer
Between the film layer that blooming layer and the additional layers directly connect；Or so that the adhesion strength between cathode and additional layers is small
Adhesion strength between cathode and organic function layer, flexible OLED display are easily adhering in folding or curly course
Film layer separation occurs for the small position of power, controls the position that film layer occurs and detaches by the additional layers herein, avoids to draw
It plays impaired film layer and film layer separation occurs, so as to avoid the problem that/reduce flexible OLED display failure, improve
The q＆r of flexible OLED display.
【Embodiment one】
It please refers to Fig.1, is the structure diagram of the flexible OLED display of the embodiment of the present invention one.As shown in Figure 1, institute
State the additional layers 120 that flexible OLED display 100 includes flexible substrates 110 and the covering flexible substrates 110.In the application
In embodiment, in the flexible OLED display 100, the position of adhesion strength minimum appears in the additional layers between film layer
In 120 or appear between the film layer that the additional layers 120 and the additional layers 120 directly connect.
If the problem of film layer separation occurs for the flexible OLED display 100 as a result, adhesion strength minimum also will occur in
It is in the additional layers 120 or between film layer that the additional layers 120 and the additional layers 120 directly connect, i.e., logical
The position that film layer separation occurs for the control of additional layers 120 is crossed, avoids to cause impaired film layer that film layer point occurs
From failing so as to avoid the problem that/reduce flexible OLED display 100, improve the quality of flexible OLED display 100
And reliability.
Specifically, please continue to refer to Fig. 1, the flexible OLED display 100 further includes the sun for covering the flexible substrates
The cathode 150 of pole 130, the organic function layer 140 of the covering anode 130 and the covering organic function layer 140, it is described additional
Film layer 120 covers the cathode 150 and directly connects with the cathode 150.Further, the flexible OLED display 100
Encapsulated layer 160 is further included, the encapsulated layer 160 covers the additional layers 120 and directly connects with the additional layers 120.
Wherein, in the film layer of the additional layers 120 adhesion strength be in the flexible OLED display 100 it is minimum,
Alternatively, the adhesion strength between the additional layers 120 and the film layer of the cathode 150 is in the flexible OLED display 100
It is minimum, alternatively, the adhesion strength between the film layer of the additional layers 120 and the encapsulated layer 160 is in the flexibility OLED
It is minimum in display 100.
In the embodiment of the present application, the adhesion strength between the additional layers 120 and the film layer of the cathode 150 is described
It is minimum in flexible OLED display 100.Here, the organic function layer 140 directly connects with the anode 130, it is described
Cathode 150 directly connects with the organic function layer 140.That is, between the additional layers 120 and the film layer of the cathode 150
Adhesion strength be less than adhesion strength between the organic function layer 140 and the anode 130, again smaller than the cathode 150 and institute
State the adhesion strength between organic function layer 140.
In the embodiment of the present application, the additional layers 120 are located at the cathode 150 and the encapsulated layer 160 is direct, and
Directly connect with the cathode 150 and the encapsulated layer 160.In the other embodiment of the application, the additional layers 120
The other positions that can be located in the flexible OLED display 100, for example, the additional layers 120 can be located at the envelope
It fills in layer 160.Common, the encapsulated layer 160 is the laminated construction for including organic layer and inorganic layer, the additional layers
120 can be located between the adjacent two layers lamination of the encapsulated layer 160.
It is common, adhesion strength and the cathode 150 and institute between the organic function layer 140 and the anode 130
The adhesion strength between organic function layer 140 is stated to be greater than being equal to 8g/cm2.It is preferred, therefore, that the additional layers 120 and institute
The adhesion strength stated between the film layer of cathode 150 is slightly less than 8g/cm2, for example, the film of the additional layers 120 and the cathode 150
Adhesion strength between layer can be 7.9g/cm2Or 7.8g/cm2Deng.Wherein, the organic function layer 140 and the anode 130
Between adhesion strength and the cathode 150 and the organic function layer 140 between adhesion strength, alternatively, the flexibility OLED
Adhesion strength in display between other film layers can be measured by adhering to the equipment such as force tester, on this basis,
The adhesion strength between the additional layers 120 and the film layer of the cathode 150 can be set.
Please continue to refer to Fig. 1, in the embodiment of the present application, the flexible substrates 110 include viewing area and non-display area, institute
It states additional layers 120 and covers entire flexible substrates 110 (covering viewing area and non-display area) or the entire flexible substrates of covering
110 viewing area.In the other embodiment of the application, the additional layers 120 can also only cover the flexible substrates 110
Viewing area part, for example, only covering one in the flexible substrates 110 or several pixel regions, for another example, only cover institute
State the non-pixel areas other than pixel region in flexible substrates 110.
Preferably, the additional layers 120 are formed by evaporation process.Relative to techniques such as PVD, CVD or spin coatings, steam
The adhesion strength for the film layer that depositing process is formed is weaker.Therefore, the additional layers 120 are preferably formed by evaporation process.Into one
Step, the material of the additional layers 120 can be selected from organic material or inorganic material.For example, the additional layers 120
Material can with formed hole transmission layer (HoleTransport Layer, HTL) material identical.It is preferably, described additional
The thickness of film layer 120 is 0.1 μm~10 μm.
In the embodiment of the present application one, additional layers are introduced so that in the flexible OLED display, between film layer
The position of adhesion strength minimum appears in the additional layers or appears in the additional layers and the additional layers are direct
Between the film layer to connect, the position that film layer occurs and detaches is controlled by the additional layers herein, avoid can causing function by
Film layer separation occurs for the film layer of damage, so as to avoid the problem that/reduce flexible OLED display failure, improves flexible OLED
The q＆r of display.
【Embodiment two】
It please refers to Fig.2, is the structure diagram of the flexible OLED display of the embodiment of the present invention two.As shown in Fig. 2, institute
It states flexible OLED display 200 and includes flexible substrates 210, the anode 220 of the covering flexible substrates 210, the covering anode
220 organic function layer 230, the cathode 240 of the covering organic function layer 230, the additional layers for covering the cathode 240
250 and the encapsulated layer 260 of the covering additional layers 250, wherein, the cathode 240 respectively with the organic function layer 230 and
The additional layers 250 directly connect, and the additional layers 250 also directly connect with the encapsulated layer 260；The cathode 240
Adhesion strength between the additional layers 250 is less than the adhesion strength between the cathode 240 and the organic function layer 230,
And/or the adhesion strength between the encapsulated layer 260 and the additional layers 250 is less than the cathode 240 and the organic functions
Adhesion strength between layer 230.
Wherein, the adhesion strength between the cathode 240 and the additional layers 250 can be less than 260 He of encapsulated layer
Adhesion strength between the additional layers 250, alternatively, the adhesion strength between the cathode 240 and the additional layers 250 is equal to
Adhesion strength between the encapsulated layer 260 and the additional layers 250, alternatively, the cathode 240 and the additional layers 250
Between adhesion strength can also be more than adhesion strength between the encapsulated layer 260 and the additional layers 250.
Inventor the study found that existing flexible OLED display in folding or curly course, easily in organic work(
Film layer separation occurs for interface that ergosphere and cathode connect, since this film layer separation at two will result directly in flexible OLED display
Function the problem of being damaged, failing so as to cause flexible OLED display.
Therefore, in the embodiment of the present application two, especially there is provided the additional layers 250 and its film layer for directly connecting it
Between adhesion strength so that adhesion strength between the cathode 240 and the additional layers 250 is less than the cathode 240 and described
Adhesion strength between organic function layer 230 and/or, the adhesion strength between the encapsulated layer 260 and the additional layers 250 is small
Adhesion strength between the cathode 240 and the organic function layer 230.That is, in the embodiment of the present application two, the cathode
Adhesion strength between 240 and the additional layers 250 is less than the adherency between the cathode 240 and the organic function layer 230
Power；Alternatively, the adhesion strength between the encapsulated layer 260 and the additional layers 250 is less than the cathode 240 and organic work(
Adhesion strength between ergosphere 230；Alternatively, the adhesion strength between the cathode 240 and the additional layers 250 is less than the cathode
Adhesion strength between 240 and the organic function layer 230 and gluing between the encapsulated layer 260 and the additional layers 250
Attached power is less than the adhesion strength between the cathode 240 and the organic function layer 230.
If the problem of film layer separation, occurs for the flexible OLED display 200 as a result, relative to the cathode 240 and institute
Between stating organic function layer 230, the problem of film layer detaches, also will occur in the smaller cathode 240 of adhesion strength and described additional
Between film layer 250 or between the encapsulated layer 260 and the additional layers 250, i.e., controlled and sent out by the additional layers 250
The position of filming layer separation, avoid can causing impaired film layer occur film layer separation (here, it is main avoid it is described
Film layer separation occurs between cathode 240 and the organic function layer 230), so as to avoid/reduce flexible OLED display
The problem of 200 failure, improves the q＆r of flexible OLED display 200.
Further, inventor has found, in the prior art, is relatively easy to that film layer separation occurs in the organic function layer
Problem, it is preferred, therefore, that the adhesion strength between the cathode 240 and the additional layers 250 is also less than the organic function layer
Adhesion strength in 230 and/or, the adhesion strength between the encapsulated layer 260 and the additional layers 250 is less than organic work(
Adhesion strength in ergosphere 230.In the embodiment of the present application, the organic function layer 230 specifically may include hole injection layer (Hole
Inject Layer, HIL), hole transmission layer (Hole Transport Layer, HTL), organic luminous layer (Emitting
Material Layer), electron transfer layer (Electron Transport Layer, ETL) and electron injecting layer (Electron
Inject Layer, EIL).Preferably, the adherency in the organic function layer 230 between arbitrary two layers of the film layer directly to connect
Power is more than adhesion strength between the cathode 240 and the additional layers 250 or more than the encapsulated layer 260 and described additional
Adhesion strength between film layer 250.
In the embodiment of the present application, the organic function layer 230 also directly connects with the anode 220.Preferably, it is described
Adhesion strength between cathode 240 and the additional layers 250 is less than the organic function layer 230 and the anode 220 is direct
Adhesion strength and/or, adhesion strength between the encapsulated layer 260 and the additional layers 250 is less than the organic function layer 230
Adhesion strength between the anode 220.Thus, it is also ensured that film layer separation is not happened at 230 He of organic function layer
Between the anode 220, so as to further improve the q＆r of the flexible OLED display 200.
In the embodiment of the present application, in the flexible OLED display 200, the position of adhesion strength minimum can between film layer
To be not present in the film layer that in the additional layers 250 or the additional layers 250 and the additional layers 250 directly connect
Between, however, it is preferred to, in the additional layers 250 or 250 direct phase of the additional layers 250 and the additional layers
Adhesion strength between the film layer connect is more than the adhesion strength between the cathode 240 and the additional layers 250, it is preferred that also big
Adhesion strength in the organic function layer 230, it is preferred that also greater than between the organic function layer 230 and the anode 220
Adhesion strength.
Please continue to refer to Fig. 2, in the embodiment of the present application, the flexible substrates 210 include viewing area and non-display area, institute
State the part that additional layers 250 only cover the viewing area.For example, the viewing area includes multiple pixel regions, the supplement film
Layer 250 only covers the pixel region of one or partial amt in the flexible substrates 210, and for another example, the additional layers 250 are only
Cover the non-pixel areas in the viewing area other than pixel region in the flexible substrates 110.That is, in the embodiment of the present application, institute
It is not a flood to state additional layers 250, for example, the additional layers 250 only cover the part number in the flexible substrates 210
The pixel region of amount, then the additional layers 250 are not a flood, but including multiple additional layers blocks, if as a result, wherein one
Film layer separation has occurred at a additional layers block, can't influence at other several additional layers blocks, it is described so as to avoid
The film layer separation problem of flood occurs for flexible OLED display 200, further improves the matter of the flexible OLED display 200
Amount and reliability.
Preferably, the additional layers 250 are formed by evaporation process.Relative to techniques such as PVD, CVD or spin coatings, steam
The adhesion strength for the film layer that depositing process is formed is weaker.Therefore, the additional layers 250 are preferably formed by evaporation process.Into one
Step, the material of the additional layers 250 can be selected from organic material or inorganic material.For example, the additional layers 250
Material can with formed hole transmission layer (HoleTransport Layer, HTL) material identical.It is preferably, described additional
The thickness of film layer 2500 is 0.1 μm~10 μm.
In the embodiment of the present application two, additional layers are introduced, also, viscous between the cathode and the additional layers
Attached power be less than adhesion strength between the cathode and the organic function layer and/or, the encapsulated layer and the additional layers it
Between adhesion strength be less than adhesion strength between the cathode and the organic function layer, pass through additional layers control hair herein
The position of filming layer separation avoids to cause impaired film layer that film layer separation occurs, so as to avoid/reduce flexibility
The problem of OLED display fails improves the q＆r of flexible OLED display.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Range.
Claims (10)
1. a kind of flexible OLED display, which is characterized in that the flexible OLED display is included described in flexible substrates and covering
The additional layers of flexible substrates, in the flexible OLED display, the position of adhesion strength minimum appears in described between film layer
In additional layers or appear between the film layer that the additional layers and the additional layers directly connect.
2. flexible OLED display as described in claim 1, which is characterized in that the flexible OLED display further includes covering
The cathode of the anode of the flexible substrates, the organic function layer of the covering anode and the covering organic function layer, it is described attached
Blooming layer covers the cathode and directly connects with the cathode.
3. flexible OLED display as described in claim 1, which is characterized in that the flexible OLED display further includes encapsulation
Layer, the encapsulated layer cover the additional layers and directly connect with the additional layers.
4. flexible OLED display as described in claim 1, which is characterized in that the flexible substrates include viewing area and non-aobvious
Show area, the additional layers only cover the part of the viewing area.
5. such as flexible OLED display according to any one of claims 1 to 4, which is characterized in that the additional layers pass through
Evaporation process is formed, and the material of the additional layers is selected from organic material or inorganic material.
6. a kind of flexible OLED display, which is characterized in that the flexible OLED display is described soft including flexible substrates, covering
Property the anode of substrate, the organic function layer of the covering anode, the cathode of the covering organic function layer, the covering cathode
The encapsulated layer of additional layers and the covering additional layers, wherein, the cathode respectively with the organic function layer and described attached
Blooming layer directly connects, and the additional layers also directly connect with the encapsulated layer；Between the cathode and the additional layers
Adhesion strength be less than adhesion strength between the cathode and the organic function layer and/or, the encapsulated layer and the supplement film
Adhesion strength between layer is less than the adhesion strength between the cathode and the organic function layer.
7. flexible OLED display as claimed in claim 6, which is characterized in that between the cathode and the additional layers
Adhesion strength be also less than adhesion strength in the organic function layer and/or, the adherency between the encapsulated layer and the additional layers
Power is less than the adhesion strength in the organic function layer.
8. flexible OLED display as claimed in claim 6, which is characterized in that the organic function layer is also straight with the anode
It connects and connects, the adhesion strength between the cathode and the additional layers is less than the organic function layer and the anode directly glues
Attached power and/or, adhesion strength between the encapsulated layer and the additional layers be less than the organic function layer and the anode it
Between adhesion strength.
9. flexible OLED display as claimed in claim 6, which is characterized in that the flexible substrates include viewing area and non-aobvious
Show area, the additional layers only cover the part of the viewing area.
10. the flexible OLED display as described in any one of claim 6~9, which is characterized in that the additional layers pass through
Evaporation process is formed, and the material of the additional layers is selected from organic material or inorganic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810054291.0A CN108258150A (en) | 2018-01-19 | 2018-01-19 | Flexible oled display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810054291.0A CN108258150A (en) | 2018-01-19 | 2018-01-19 | Flexible oled display |
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| CN108258150A true CN108258150A (en) | 2018-07-06 |
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| CN201810054291.0A Pending CN108258150A (en) | 2018-01-19 | 2018-01-19 | Flexible oled display |
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| CN1925140A (en) * | 2005-08-31 | 2007-03-07 | 株式会社半导体能源研究所 | Semiconductor device and manufacturing method thereof |
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