CN108389514A - Flexible display screen and display device - Google Patents
Flexible display screen and display device Download PDFInfo
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- CN108389514A CN108389514A CN201810130624.3A CN201810130624A CN108389514A CN 108389514 A CN108389514 A CN 108389514A CN 201810130624 A CN201810130624 A CN 201810130624A CN 108389514 A CN108389514 A CN 108389514A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Abstract
The invention discloses a flexible display screen and a display device, which are used for reducing the probability of crack defects of a thin film packaging layer and an organic light emitting diode array film layer, improving the yield of products, reducing the cost and improving the production efficiency. The flexible display screen comprises a display screen body and a functional film body attached to the display screen body, wherein the surface of the functional film body, which is far away from the display screen body, comprises a first main body area and a first tearing area which is positioned at the edge of the functional film body, and the first tearing area of the functional film body has adhesive force which is smaller than that of the first main body area.
Description
Technical field
The present invention relates to display technology fields, more particularly to a kind of flexible display screen and display device.
Background technology
Flexible display screen has the characteristics that not available for many traditional display screens such as frivolous, shock resistance, rollable, so as to
So that display device is more frivolous, portable and beautiful and stylish, it is provided for more wide development space.Therefore, in electronics
The display fields such as paper, active matrix organic light-emitting diode have been obtained by the flexible display technologies of representative of flexible display screen
Extensive concern and research.
In the prior art, a kind of OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode, abbreviation
OLED) flexible display screen includes underlay substrate, the OLED arrays on underlay substrate and the thin-film package for covering OLED arrays
Layer (Thin Film Encapsulation, abbreviation TFE).In general, in order to improve the product quality of flexible display screen, enrich soft
Property display screen function, need side of the thin-film encapsulation layer in flexible display screen far from OLED arrays to attach various functions film,
Such as block water film and touch control film etc..Above-mentioned functional membrane generally includes function membrane body and the protection for being attached at above-mentioned function membrane body
Film after functional membrane is attached at flexible display screen, needs to tear said protection film.Due to TFE generally uses inkjet printing, change
The techniques such as vapor deposition are learned to make, and OLED array generally use evaporation process makes, therefore, between TFE and OLED arrays
Adhesion strength is weaker, and when tearing protective film, scaling defects are likely to occur between TFE and OLED arrays；Or since film layer is relatively thin,
Lead to the cracked defect of TFE and OLED array film layers, the reduction of OLED flexible display screen yields or even qualification rate caused to reduce,
There is more scrap.
In the prior art, usually by management and control and optimization dyestripping gimmick, it is aobvious to OLED flexibilities to reduce to reduce dyestripping speed
The harmful effect of display screen, still, the program are more demanding to the level of skill of operating personnel, and human cost is high, and production efficiency
It is low.
Invention content
The purpose of the embodiment of the present invention is to provide a kind of flexible display screen and display device, to reduce TFE and OLED arrays
The probability of the cracked defect of film layer improves product yield, reduces cost, improves production efficiency.
The flexible display screen that the embodiment of the present invention is provided includes display screen ontology and is attached at the display screen ontology
Function membrane body, surface of the function membrane body far from the display screen ontology is including the first body region and is located at the work(
Can the first at membrane body edge tear region, the adhesion strength that the first of the function membrane body tears region is less than described the
The adhesion strength of one body region.
In the embodiment of the present invention, the first of function membrane body tears the adherency of the adhesion strength less than the first body region in region
Power, then rise tear it is more convenient.Due to tear protective film when, act that generate when tearing be initial stiction, rise after the completion of tearing, subsequently
The process of tearing generally produce dynamic friction, and under equal conditions, stiction is more than dynamic friction.The embodiment of the present invention
In, the first of function membrane body tears the adhesion strength of the adhesion strength less than the first body region in region, then, the first tears region production
Raw stiction is reduced, and the stiction generated when protective film is torn so as to reduce, and reduces TFE and OLED arrays
The probability of the cracked defect of film layer improves product yield, reduces cost.Further, since rise tear region adhesion strength it is smaller, production
Raw stiction reduces, and also allows for tearing protective film in function membrane body, so as to improve the production effect of flexible display screen
Rate.
In specific technical solution, the adhesion strength that the first of function membrane body tears region is made to be less than the first body region
The mode of adhesion strength is unlimited.In one optional technical solution, the first of the function membrane body tears the coarse of region
Degree is more than the roughness of first body region.To reduce the adhesion strength that the first tears region.
Based on the above technical solution, the first of the function membrane body, which tears region, has asperities knot
Structure, the asperities structure include straight asperities structure, wave asperities structure or grid asperities structure.
In another optional technical solution, the first of the function membrane body tears the hydrophily in region, is less than
The hydrophily of first body region.Since hydrophily is bigger, the adhesion strength of colloid is bigger, and therefore, the program can also drop
Low the first tears the adhesion strength in region.
On the basis of a upper technical solution, it is hydrophobicity that the first of the function membrane body, which tears the surface in region,
The surface on surface, first body region is hydrophilic surface.Specifically, the first tears the angle of dripping in region>90 degree,
The angle of dripping of first body region<90 degree.
In further technical solution, flexible display screen further includes being attached at the function membrane body far from the display screen
The protective film on the surface of ontology, the protective film include the second body region and second towards the side of the function membrane body
Region is torn, second body region is opposite with first body region, and described second is torn region and torn with the first
Region is opposite；Second adhesion strength for tearing region of the protective film is less than the adhesion strength of second body region.It should
Scheme is handled by the side in protective film, to have reduced the adhesion strength torn between locality protection film and function membrane body.
In specific technical solution, second adhesion strength for tearing region of protective film is made to be less than the adherency of the second body region
The mode of power is unlimited.In one optional technical solution, second roughness for tearing region of the protective film is more than institute
State the roughness of the second body region.
Based on the above technical solution, in another technical solution, described second of the protective film tears region tool
It includes straight asperities structure, wave asperities structure or grid asperities structure to have asperities structure, the asperities structure.
In one optional technical solution, the size that region is torn to the first is limited.Specifically, the first
It is rectangular area, the long L of the rectangular area to tear region1With wide L2Meet：0.2mm≤L1≤1.2mm；0.2mm≤L2≤
1.2mm。
In one optional technical solution, the position that region is torn to the first is limited.Specifically, the first
Tear the angular zone that region is located at the function membrane body.It tears since angular zone and is pasted on the protective film of function membrane body, grasp
Make more convenient.
In another technical solution, and the position in region is torn to the first and is limited.The first tears region
Positioned at the fringe region of the function membrane body, and surround first body region.It can be from the edge of flexible display screen
Any position starts protective film of tearing, and without tearing protective film in setting position, operation is more convenient.
In a technical solution of the invention, flexible display screen includes viewing area and the non-display area positioned at viewing area side,
The first tears region and is located at the non-display area.It prevents the first from tearing region and is located at viewing area, lead to viewing area display effect
Fruit is poor.Therefore the program can make each even film layer of viewing area, improve display effect.
Based on the above technical solution, flexible display screen further includes the driving chip positioned at the non-display area, institute
It states the first and tears region and be located at the function membrane body close to the side of the driving chip.Guarantor is torn off in functional membrane body surface
When cuticula, if generating electrostatic, electrostatic is along the direction conduction for tearing region far from the first, so as to reduce the damage to driving chip
Wound, improves the service life of flexible display screen.
Technical scheme of the present invention additionally provides a kind of display device, which includes in any of the above-described technical solution
The flexible display screen.The probability of the cracked defect of TFE and OLED array film layers of the display device is smaller, product yield
Higher, production cost is relatively low, and production efficiency is higher.
Description of the drawings
Fig. 1 is the flexible display screen surface structural schematic diagram of one embodiment of the invention；
Fig. 2 is the structural schematic diagram of the function membrane body of another embodiment of the present invention；
Fig. 3 is the flexible display screen surface structural schematic diagram of another embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the protective film of another embodiment of the present invention；
Fig. 5 is that the first of one embodiment of the invention tears region or second structural schematic diagram for tearing region；
Fig. 6 is that the first of another embodiment of the present invention tears region or second structural schematic diagram for tearing region；
Fig. 7 is that the first of another embodiment of the present invention tears region or second structural schematic diagram for tearing region；
Fig. 8 is that the first of another embodiment of the present invention tears region or second structural schematic diagram for tearing region；
Fig. 9 is that the first of another embodiment of the present invention tears region or second structural schematic diagram for tearing region；
The structural schematic diagram of the function membrane body of Figure 10 another embodiment of the present invention；
Figure 11 is the structural schematic diagram of the flexible display screen of another embodiment of the present invention；
Figure 12 is the structural schematic diagram of the display device of one embodiment of the invention.
Reference numeral：
1- display screen ontologies；2- function membrane bodies；
The first body regions of 21-；22- the firsts tear region；
3- protective films；The second body regions of 31-；
32- second, which rises, tears region；4- flexible display screens；
The viewing areas 41-；42- non-display areas；
5- driving chips；The straight asperities structures of 6-；
7- wave asperities structures；8- grid asperities structures；
9- dot bulges；10- frosted structures；
100- display devices.
Specific implementation mode
To reduce the probability of the cracked defect of TFE and OLED array film layers, product yield is improved, cost is reduced, is improved
Production efficiency, an embodiment of the present invention provides a kind of flexible display screen and display devices.To make the purpose of the present invention, technical solution
Clearer with advantage, invention is further described in detail by the following examples.
As depicted in figs. 1 and 2, flexible display screen provided in an embodiment of the present invention includes display screen ontology 1 and is attached at aobvious
The function membrane body 2 of display screen ontology 1, wherein function membrane body 2 includes block water film or touch control film.Function membrane body 2 is far from display
The surface for shielding ontology 1 includes that the first body region 21 and the first positioned at 2 edge of function membrane body tear region 22, functional membrane sheet
The first of body 2 tears the adhesion strength of the adhesion strength less than the first body region 21 in region 22.
When making flexible display screen, it usually needs attach various functions on 1 surface of display screen ontology of flexible display screen
Film enriches the function of flexible display screen to improve the product quality of flexible display screen.Specifically, display screen ontology 1 generally includes
Organic Light Emitting Diode OLED arrays and the thin-film encapsulation layer TFE for covering above-mentioned OLED arrays, above-mentioned function membrane body 2 then attach
In sides of the TFE far from OLED arrays.The front surface that function membrane body 2 is attached at display screen ontology 1 is also pasted with protective film 3,
After function membrane body 2 is pasted on display screen ontology 1, it is also necessary to which the protective film 3 of outer surface is torn.In order to reduce the guarantor that tears
Adhesive effect of the cuticula 3 between function membrane body 2 and display screen ontology 1, in of the invention, function membrane body 2 is far from display screen
The surface of ontology 1 includes that the first body region 21 and the first positioned at 2 edge of function membrane body tear region 22, wherein protection
Film 3 is attached at surface of the function membrane body 2 far from display screen ontology 1, then tear protective film 3 when, tear region 22 from the first and open
Begin to tear, in other words, the 3 corresponding region of protective film that starts to tear is that the first tears region 22.
In specific embodiment, display screen ontology 1 includes flexible base board, the drive for being formed in flexible base board side and being arranged in order
Dynamic circuit layer, light emitting element layer and thin-film encapsulation layer.Wherein, light emitting element layer includes anode layer, OLED luminous organic materials
Layer and cathode layer.Wherein, for anode layer between drive circuit layer and OLED organic light emitting materials, cathode layer is located at OLED
Between organic light emitting material and thin-film encapsulation layer.PI (polyimides), PET (poly terephthalic acids may be used in flexible base board
Glycol ester), PC (makrolon), PEN (polyethylene naphthalate), COP (cyclic olefin polymer), PMMA (poly- methyl
Methacrylate) etc. bendable materials so that flexible display screen have larger curvature.
Wherein, the specific type of flexible display screen is unlimited.For example, flexible display screen can be flexible organic light emitting display face
Plate, flexible electrophoretic display panel, flexible liquid crystal panel or flexible Electrowetting display panel.
In the embodiment of the present invention, the first of function membrane body 2 tears the adhesion strength in region 22 less than the first body region 21
Adhesion strength.Then rise tear it is more convenient.Due to tear protective film 3 when, act that generate when tearing be initial stiction, rise and tear completion
Afterwards, the subsequent process of tearing generally produces dynamic friction, and under equal conditions, stiction is more than dynamic friction.This hair
In bright embodiment, the first of function membrane body 2 tears the adhesion strength of the adhesion strength less than the first body region 21 in region 22, then,
The stiction that the first tears the generation of region 22 is reduced, and the stiction generated when protective film 3 is torn so as to reduce,
The probability of the cracked defect of TFE and OLED array film layers is reduced, product yield is improved, reduces cost.Further, since the areas Qi Si
The adhesion strength in domain is smaller, and the stiction of generation reduces, and also allows for tearing protective film 3 in function membrane body 2, so as to improve
The production efficiency of flexible display screen.
In specific embodiment, the adhesion strength that the first of function membrane body 2 tears region 22 is made to be less than the first body region
The mode of 21 adhesion strength is unlimited, for example, in one embodiment, the roughness that the first of function membrane body 2 tears region 22 is big
In the roughness of the first body region 21.Since the roughness that function membrane body 2 tears in the first region 22 is larger, then functional membrane
Adhesion strength between ontology 2 and protective film 3 is also smaller.
Fig. 5 to Fig. 7 is please referred to, on the basis of the above embodiments, in order to make the first of function membrane body 2 tear region 22
Roughness be more than the first body region 21 roughness, can the first tear region 22 make asperities structure.Asperities
The concrete form of structure is not limited, for example, can be recessed for straight asperities structure 6 as shown in Figure 5, wave as shown in FIG. 6
Raised lines structure 7 or grid asperities structure 8 as shown in Figure 7 can design suitable asperities according to self-demand, with
Improve the roughness that the first tears region 22.It is of course also possible to use other modes improve the first and tear the coarse of region 22
Degree either dotted pit or is done for example, making dot bulge 9 as shown in Figure 8 as shown in figure 9, the first is torn region 22
At frosted structure 10.
In another embodiment, the first tears the hydrophily of the hydrophily less than the first body region 21 in region 22.Due to parent
Aqueous bigger surface is more easy to be bonded, therefore the hydrophily of function membrane body 2 is bigger, and the adhesion strength of colloid is bigger, therefore, the reality
It applies in example, it is smaller that the adhesion strength that the first is torn between the function membrane body 2 in region 22 and protective film 3 can also be reduced.
Further, it is hydrophobic surface, the first main body that the surface of functional membrane ontology 2 can be made, which to tear region 22 in the first,
Region 21 is hydrophilic surface.
Specifically, the hydrophily and hydrophobicity on the surface of above-mentioned function membrane body 2, can determine, water droplet according to water droplet angle
Angle is smaller, then hydrophily is higher.Specifically, more than 90 degree of angle indication surface of dripping is hydrophobic surface；Angle drip less than 90 degree
Indication surface is hydrophilic surface.
It please refers to Fig.3 and Fig. 4, in further embodiment, surface of the function membrane body 2 far from display screen ontology 1 attaches
There is protective film 3, a side surface of the protective film 3 towards function membrane body 2 includes：With 21 opposite second main body of the first body region
Region 31, and tear opposite second in region 22 with the first and tear region 32, and, second of protective film 3 tears region 32
Adhesion strength is less than the adhesion strength of the second body region 31.
In the implementation, protective film 3 has second towards the surface of function membrane body 2 and tears region 32 and the second body region
31, and second adhesion strength for tearing region 32 is less than the adhesion strength of the second body region 31.Second is torn the quiet of the generation of region 32
Frictional force is reduced, and the stiction generated when protective film 3 is torn so as to reduce, and reduces TFE and OLED array film layers
The probability of cracked defect improves product yield, reduces cost.Further, since rise tear region adhesion strength it is smaller, generation
Stiction reduces, and also allows for tearing protective film 3 in function membrane body 2, so as to improve the production efficiency of flexible display screen.
The program tears locality protection film 3 and function membrane body 2 by being handled in the side of protective film 3 to have reduced
Between adhesion strength.
In specific embodiment, second adhesion strength for tearing region 32 of protective film 3 is made to be less than the second body region 31
The mode of adhesion strength is unlimited, for example, in one embodiment, second roughness for tearing region 32 is more than the second body region 31
Roughness.It is since the roughness that protective film 3 tears at second region 32 is larger, then viscous between function membrane body 2 and protective film 3
Attached power is also smaller.
Please continue to refer to Fig. 5 to Fig. 7, specifically, in order to make the second of protective film 3 roughness for tearing region 32 be more than the
The roughness of two body regions 31 can tear region 32 at second and make asperities structure.The concrete form of asperities structure
It is not limited, for example, can be as shown in Figure 5 straight asperities structure 6, wave asperities structure 7 as shown in FIG. 6, or
Grid asperities structure 8 as shown in Figure 7 can design suitable asperities, to improve the second areas Qi Si according to self-demand
The roughness in domain 32.It is of course also possible to use other modes improve second roughness for tearing region 32, for example, making such as
Dot bulge 9 shown in Fig. 8 either dotted pit or as shown in figure 9, tearing region 32 by second makes frosted structure 10.
In specific embodiment, it is rectangular area, the long L of rectangular area that the first, which tears region 22,1With wide L2Meet：0.2mm
≤L1≤1.2mm；0.2mm≤L2≤1.2mm.Region setting is torn when rising within the above range, then can reduce and tear the quiet of region
Frictional force makes to generate dynamic friction between protective film 3 and function membrane body 2, you can achieve the object of the present invention.The embodiment
In, the area that the first to be treated tears region 22 is smaller, therefore can improve production efficiency.It is worth noting that square herein
The long L in shape region1With wide L2There is no specific directions to limit, and side in one direction is long L1, then along the side in another direction
For wide L2.
Referring to FIG. 2, in further embodiment, the first tears the angular zone that region 22 is located at function membrane body 2, from angle
Region, which starts to tear, is pasted on the protective film 3 of function membrane body 2, and operation is more convenient.
Referring to FIG. 10, in another specific embodiment, the first tears the marginal zone that region 22 is located at function membrane body 2
Domain, and surround the first body region 21.It is that the first tears region 22 around the first body region 21, that is, soft in the embodiment
The edge of property display screen is that the first tears region 22, can be from Flexible Displays when tearing protective film 3 from function membrane body 2
Any position at the edge of screen starts, and without tearing protective film 3 in setting position, operation is more convenient.
Please refer to Fig.1 1, in one embodiment, flexible display screen 4 includes viewing area 41 and positioned at the non-of 41 side of viewing area
Viewing area 42, the first tear region 22 and are then located at above-mentioned non-display area 42.It can prevent the first from tearing region 22 and be located at viewing area
41, cause 41 display effect of viewing area poor.Therefore the program can make each even film layer of viewing area 41, improve display effect
Fruit.
Please continue to refer to Figure 11, in further embodiment, flexible display screen 4 includes the driving core positioned at non-display area 42
Piece 5, the first tear region 22 and are located at function membrane body 2 close to the side of driving chip 5.In the embodiment, when in functional membrane sheet
2 surface of body tear protective film 3 when, tear since the first tears region 22, tear along the direction in region 22 is torn far from the first.
When 2 surface of function membrane body tears off protective film 3, if generating electrostatic, electrostatic is conducted along the direction for tearing region 22 far from the first, from
And the damage to driving chip 5 can be reduced, improve the service life of flexible display screen 4.
Please refer to Fig.1 2, in the embodiment of the present invention, additionally provide a kind of display device 100, the display device 100 it is specific
Type is unlimited, which can be such as smartwatch, mobile phone, tablet computer, laptop, electric paper book or TV
Any electronic equipment with display function such as machine, but include the flexible display screen 4 in any of the above-described technical solution.The display
The probability of the cracked defect of TFE and OLED array film layers of device 100 is smaller, and product yield is higher, and production cost is relatively low, and
Production efficiency is higher.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (14)
1. a kind of flexible display screen, which is characterized in that including display screen ontology and the functional membrane for being attached at the display screen ontology
Ontology, surface of the function membrane body far from the display screen ontology is including the first body region and is located at the functional membrane sheet
The first at body edge tears region, and the first of the function membrane body tears the adhesion strength in region less than first main body
The adhesion strength in region.
2. flexible display screen according to claim 1, which is characterized in that the first of the function membrane body tears area
The roughness in domain is more than the roughness of first body region.
3. flexible display screen according to claim 2, which is characterized in that the first of the function membrane body tears area
Domain has asperities structure, and the asperities structure includes straight asperities structure, wave asperities structure or grid asperities
Structure.
4. flexible display screen according to claim 1, which is characterized in that the first of the function membrane body tears area
The hydrophily in domain is less than the hydrophily of first body region.
5. functional membrane according to claim 4, which is characterized in that the first of the function membrane body tears region
Surface is hydrophobic surface, and the surface of first body region is hydrophilic surface.
6. flexible display screen according to claim 1, which is characterized in that further include that be attached at the function membrane body separate
The protective film on the surface of the display screen ontology, the protective film include the second body region towards the side of the function membrane body
Domain and second tear region, and second body region is opposite with first body region, and described second is torn region and institute
Stating the first, to tear region opposite；
Second adhesion strength for tearing region of the protective film is less than the adhesion strength of second body region.
7. flexible display screen according to claim 6, which is characterized in that described second of the protective film tears region
Roughness is more than the roughness of second body region.
8. flexible display screen according to claim 7, which is characterized in that described second of the protective film tears region tool
It includes straight asperities structure, wave asperities structure or grid asperities structure to have asperities structure, the asperities structure.
9. flexible display screen according to claim 1, which is characterized in that it is rectangular area, institute that the first, which tears region,
State the long L of rectangular area1With wide L2Meet：0.2mm≤L1≤1.2mm；0.2mm≤L2≤1.2mm。
10. flexible display screen according to claim 1, which is characterized in that the first tears region and is located at the function
The angular zone of membrane body.
11. flexible display screen according to claim 1, which is characterized in that the first tears region and is located at the function
The fringe region of membrane body, and surround first body region.
12. flexible display screen according to claim 1, which is characterized in that including viewing area and positioned at viewing area side
Non-display area, the first tear region and are located at the non-display area.
13. flexible display screen according to claim 12, which is characterized in that further include the driving positioned at the non-display area
Chip, the first tear region and are located at the function membrane body close to the side of the driving chip.
14. a kind of display device, which is characterized in that including such as claim 1~13 any one of them flexible display screen.
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| CN201810130624.3A CN108389514A (en) | 2018-02-08 | 2018-02-08 | Flexible display screen and display device |
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| CN109872645A (en) * | 2019-03-19 | 2019-06-11 | 深圳市洲明科技股份有限公司 | Waterproof LED display screen |
| CN112928145A (en) * | 2021-01-26 | 2021-06-08 | 京东方科技集团股份有限公司 | Display panel, display device and preparation method thereof |
| CN115258323A (en) * | 2021-04-29 | 2022-11-01 | 北京小米移动软件有限公司 | Film tearing control method and device, electronic equipment and storage medium |
| CN116110298A (en) * | 2023-02-10 | 2023-05-12 | 武汉天马微电子有限公司 | Display module and preparation method thereof |
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