CN107134538A - A kind of display base plate, preparation method and display device - Google Patents
A kind of display base plate, preparation method and display device Download PDFInfo
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- CN107134538A CN107134538A CN201710515837.3A CN201710515837A CN107134538A CN 107134538 A CN107134538 A CN 107134538A CN 201710515837 A CN201710515837 A CN 201710515837A CN 107134538 A CN107134538 A CN 107134538A
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- protective layer
- layer
- base plate
- display base
- display device
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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
-
- 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
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
- H10K77/10—Substrates, e.g. flexible substrates
- H10K77/111—Flexible substrates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The present invention provides a kind of display base plate, preparation method and display device.Wherein, display base plate includes：Flexible substrates, the display device and encapsulated layer of formation on a flexible substrate, the encapsulated layer cover the display device；It is arranged on the protective layer in the flexible substrates, it is described protective layer used to be controlled in by the position of the stress neuter layer of the display base plate on the position of the encapsulated layer.In the solution of the present invention; change the film layer structure of display base plate by setting protective layer; so as to by the position adjustment of stress neuter layer to encapsulated layer; the stress neuter layer is the position that minimum is stressed after display base plate is bent; therefore the present invention can effectively reduce the probability of the generation breakage of encapsulated layer, so as to avoid display device from failing.
Description
Technical field
The present invention relates to the making field of display device, a kind of display base plate, preparation method and display device are particularly related to.
Background technology
Current flexible display apparatus and curved-surface display device make what is obtained based on flexible substrates, due to can roll up
Song, wide viewing angle, the features such as be easy to carry, therefore, have broad application prospects and good market potential.
Existing flexible display apparatus and curved-surface display device are all to set flexible package layer to be packaged in the top.
Current flexible package layer is needed with certain encapsulation requirement, therefore is made up of specific material.Flexible envelope is disclosure satisfy that at present
The material of dress layer has certain defect in pliability, particularly when flexible package layer is fitted in surface location, it is easier to because certainly
Body is bent and the breakage on recurring structure, so as to cause flexible display device seal failure, causes disabler.
In view of this, a kind of flimsy technical scheme of solution flexible package layer is currently needed badly.
The content of the invention
Present invention aim to address existing display base plate flexible package layer it is easily damaged the problem of.
To achieve the above object, on the one hand, embodiments of the invention provide a kind of display base plate, including：
Flexible substrates, the display device and encapsulated layer of formation on a flexible substrate, the encapsulated layer cover the display
Device；
It is arranged on the protective layer in the flexible substrates, it is described protective layer used in by the stress neuter layer of the display base plate
Position control on the position of the encapsulated layer.
Wherein, the protective layer be located at side of the encapsulated layer away from the flexible substrates, and with the encapsulated layer phase
Contact.
Wherein, the flexible substrates have bent region, and the bent region is completely covered in the protective layer, so that
The position of the stress neuter layer in the bent region of display base plate correspondence is controlled on the position of the encapsulated layer.
Wherein, the protective layer has at least one groove structure in the part in bent region, the groove structure
Opening is directed away from the side of the flexible substrates.
Wherein,
The groove structure is shaped as polygon or hemispherical or ball the section on its own bearing of trend
Shape.
Wherein, the protective layer at least includes a first sub- protective layer and a protective layer of son second, first son
Protective layer is formed by inorganic material, and the second sub- protective layer is formed by organic material, and in the described first sub- protective layer and institute
When the quantity sum for stating the second sub- protective layer is more than or equal to 3, the first sub- protective layer and the second sub- protective layer are alternately arranged.
Wherein, the material of the protective layer includes：Propenyl polymer, urethane based polymers and epoxy radicals are poly-
One of compound or the combination of any several persons.
Wherein, the average thickness of the protective layer is 10um to 150um, and average elastic modulus is 100KPa to 1GPa.
On the other hand, embodiments of the invention also provide a kind of preparation method of display base plate, including：
The step of forming display device and encapsulated layer on a flexible substrate, the encapsulated layer covers the display device,
The step of protective layer being formed in the flexible substrates, it is described protective layer used in by the position of the strain neutral layer of the display base plate
Control is put on the position of the encapsulated layer.
In addition, embodiments of the invention also provide a kind of display device, including the above-mentioned display base plate that the present invention is provided.
The such scheme of the present invention has the advantages that：
In the solution of the present invention, change the film layer structure of display base plate by setting protective layer, so that by stress
Property layer position adjustment to encapsulated layer on, the stress neuter layer be display base plate bending after be stressed minimum position, therefore
The present invention can effectively reduce the probability of the generation breakage of encapsulated layer, so as to avoid display device from failing.
Brief description of the drawings
Fig. 1 is the structural representation of display base plate provided in an embodiment of the present invention；
Fig. 2 and Fig. 3 is the detailed construction schematic diagram of display base plate provided in an embodiment of the present invention；
Fig. 4 is structural representation of the display base plate provided in an embodiment of the present invention as array base palte.
Embodiment
To make the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and tool
Body embodiment is described in detail.
For existing flexible display apparatus and curved-surface display device flexible package layer it is easily damaged the problem of, the present invention
A solution is provided.
On the one hand, embodiments of the invention provide a kind of display base plate, as shown in figure 1, including：
Flexible substrates 11；
The display device 12 in flexible substrates 11 is formed, the display device can include thin film transistor (TFT), electrode, light
Unit, signal wire etc., due to being the common part of display base plate, no longer describe in detail herein；
The encapsulated layer 13 of display device 12 is covered, the encapsulated layer 13 is hereinbefore flexible package layer, in practical application
In, the encapsulated layer 13 of the present embodiment might not must have flexibility；
The protective layer 14 in flexible substrates 11 is arranged on, the protective layer 14 is used for the position of the stress neuter layer of display base plate
Control is put on the position of encapsulated layer 13.
In the scheme of the present embodiment, change the film layer structure of display base plate by setting protective layer, so that by stress
On the position adjustment of neutral line to encapsulated layer, the stress neuter layer is the position that minimum is stressed after display base plate is bent, because
The scheme of this present embodiment can effectively reduce the probability of the generation breakage of encapsulated layer, so as to avoid display device from failing.
The display base plate of the present embodiment is described in detail with reference to practical application.
Exemplarily, the protective layer 14 of the present embodiment is located at side of the encapsulated layer 13 away from flexible substrates, and and encapsulated layer
13 are in contact.
Wherein, flexible substrates 11 have bent region, and bendable folding area is at least completely covered in the protective layer 14 of the present embodiment
Domain (region for having bending demand), so that display base plate to be at least corresponded to the position control of the stress neuter layer in bent region
System is on the position of encapsulated layer 13, i.e., the technical scheme of the present embodiment, which will at least ensure that, reduces the encapsulated layer in bent region
Stress suffered by 13.
By taking mobile phone screen as an example, as shown in Fig. 2 generally, mobile phone screen central area is viewing area A, aobvious
Showing region A both sides has the radian that necessarily bends, i.e., bent region as referred to herein, and the protective layer 14 of the present embodiment should be at least
On the flexure plane for covering mobile phone screen both sides, so as to ensure encapsulated layer 13 by minimum stress in the position.
Certainly, in actual applications, the protective layer 14 of the present embodiment can also be completely covered on encapsulated layer 13, so as to give
Whole encapsulated layer 13 provides protection.
On above-mentioned basis, preferably, as shown in figure 3, the protective layer 14 of the present embodiment is in bent region
Part there is at least one groove structure 141, the opening of the groove structure 141 is directed away from the side of flexible substrates.
Through continuous practical proof, based on the design shown in Fig. 2, groove structure 141 effectively release guard layer 14 can exist
The stress of case of bending, so as to improve the pliability of protective layer 14, it is to avoid the protective layer 14 occurs to bend and recurring structure is broken
Damage, so that corresponding stress neuter layer position shifts on the position of encapsulated layer 13.
In addition, preferably, on above-mentioned basis, the groove structure 141 of the present embodiment is perpendicular to its own
Section on bearing of trend be shaped as gengon (such as trapezoidal) or hemispherical or spherical, i.e. groove structure integrally in many variants or
Hemisphere or spheroid.
It is proven, can realizes that preferably reduction protective layer 14 is because of bending using the groove structure 141 of above-mentioned shape
Suffered stress so that protective layer 14 has higher bending resistance, so as to prevent to damage.
In actual applications, the groove structure 141 of the present embodiment protective layer 14 can be multiple, and be uniformly distributed, so that
Guarantee is uniformly discharged the stress suffered by protective layer 14, is reduced protective layer 14 and the bad problem such as is deformed, offsets
Probability.
In addition, the performance in order to further optimize protective layer 14, preferably, the protective layer of the present embodiment are included extremely
A few first sub- protective layer and at least one sub second protective layer, and when the quantity of the first sub- protective layer and the second sub- protective layer
When sum is more than or equal to 3, the first sub- protective layer and the second sub- protective layer are alternately arranged, wherein the first sub- protective layer is by inorganic material
Material is formed, and the second sub- protective layer is formed by organic material.
Based on said structure, the first sub- protective layer that inorganic material is made can prevent oxygen and moisture infiltration to display
Part, and the organic layer that organic material is made can with absorption in the first sub- protective layer stress to strengthen toughness, both replace
Arrangement, can effectively ensure that the package quality of display device.
It should be noted that in actual applications, the first sub- protective layer and the can be flexibly set according to actual use demand
Two son protection layer numbers and thickness, so as to ensure that protective layer 14 just can control encapsulated layer 13 in the position of stress neuter layer
Put.
In addition, the material of the present embodiment protective layer includes：Propenyl polymer, urethane based polymers and epoxy
One of based polyalcohol or the combination of any several persons.
Wherein, the film layer being made up of propenyl polymer, urethane based polymers and epoxy-based polymerization thing material
Structure, is respectively provided with certain bending resistance, is therefore particularly suitable for being made the protective layer 14 of the present embodiment.
In addition, the protective layer 14 of the present embodiment should be homogeneous so that being fitted in completely after display base plate can be by equal
Even stress, so as to avoid occurring irregular deformation.Introduced as exemplary, exemplified by applied in mobile phone, the present embodiment
The average thickness of protective layer 14 be advisable with 10um to 150um, average elastic modulus is advisable with 100KPa to 1GPa.Wherein, it is above-mentioned
Average thickness and average elastic modulus each mean the average level of protective layer 14, only as nonessential preferred embodiment, no
It can limit the scope of the invention.
With reference to an implementation, exemplary introduce is carried out to the display base plate of embodiment.
The display base plate of the present embodiment can be the array base palte of display device, and the array base palte has flexibility, Ke Yijin
Row bending, as shown in figure 4, including：
Flexible substrates 401, cushion 402, gate insulation layer 403, active layer 404, interlayer insulating film 405, grid 406, source/
Drain electrode 407, passivation layer 408, planarization layer 409, anode 410, pixel confining layers 411, organic luminous layer 412, negative electrode 413,
PS layers 414, encapsulated layer 415 and protective layer 416.
Wherein, the protective layer 416 of the present embodiment is arranged on array base palte the top, and adjacent with encapsulated layer 415.
Above is the introduction of the present embodiment display base plate, it can be seen that the present embodiment is at least in the bent region of display base plate
Encapsulated layer above set protective layer, make encapsulated layer just can be located at display base plate stress neuter layer position on, so as to drop
Stress suffered by the low bending of encapsulated layer, to improve the product quality of display base plate.
On the other hand, embodiments of the invention also provide a kind of preparation method of display base plate, including：
The step of forming display device and encapsulated layer on a flexible substrate, encapsulated layer covering display device；
The step of forming protective layer 14 in the flexible substrates 11, protective layer 14 is used for the stress of display base plate is neutral
The position of layer is controlled on the position of encapsulated layer.
Obviously, the preparation method of the present embodiment is used to make the display base plate that the present invention is provided, therefore the display base plate institute
The technique effect that can be realized, the preparation method of the present embodiment can similarly be realized.
In the specific implementation, the present embodiment formation protective layer mode is not unique.
Introduced as exemplary, it is assumed that the protective layer 14 of the present embodiment is positioned only at bent region, then forms protective layer
The step of include：
Deposit thickness is about 10um to 150um protective layer material on encapsulated layer, and protective layer material can be acrylic
Polymer, urethane based polymers and epoxy-based polymerization thing material；
Afterwards, one layer of photoresist is coated on protective layer material, photoresist is exposed using mask plate, makes photoresist
The non-reservation region of photoresist and photoresist reservation region are formed, wherein, photoresist reservation region corresponds to bent region, photoetching
The region that the non-reservation region of glue corresponds to beyond bent region, such as viewing area；
Development treatment is carried out afterwards, and the photoresist of the non-reservation region of photoresist is completely removed, photoresist reservation region
Photoresist thickness keeps constant；Etch away the protective layer material of the non-reservation region of photoresist completely by etching technics, peel off surplus
Remaining photoresist, to form the protective layer for only covering bent region.
Certainly, the preparation method of the present embodiment can also cover protective layer on whole display base plate, rather than bent
Region, wherein the step of forming protective layer includes：
The protective layer formed in advance is directly fitted in above encapsulated layer to (such as ionic adsorption or true with suction type
It is empty)；Or in encapsulated layer disposed thereon protective layer material, directly with depositional mode formation protective layer.
For display base plate generally, bent region is not used in display picture, when the protective layer of the present embodiment
When being positioned only at bent region, then the material of alternatively non-transparent can be used to make protective layer.If desired whole display base plate is covered,
Then need to use transparent material that protective layer is made.
In addition, embodiments of the invention also provide a kind of display device, it is upper that the display device includes that the present invention provides
Display base plate is stated, the design based on the display base plate, the display device of the present embodiment has higher yields, so as to ensure that
The usage experience of user, therefore with very high practicality.
In actual applications, the display device of the present embodiment can be：TV, display, DPF, mobile phone, flat board
Any product or part with display function such as computer, and display device also includes flexible PCB, printed circuit board (PCB) and the back of the body
Plate.
Unless otherwise defined, the technical term or scientific terminology that the disclosure is used should be tool in art of the present invention
The ordinary meaning that the personage for having general technical ability is understood." first ", " second " that is used in the disclosure and similar word are simultaneously
Any order, quantity or importance are not indicated that, and is used only to distinguish different parts." comprising " or "comprising" etc.
The element or object that similar word means to occur before the word cover the element or object for appearing in the word presented hereinafter
And its it is equivalent, and it is not excluded for other elements or object.The similar word such as " connection " or " connected " is not limited to physics
Or machinery connection, but electrical connection can be included, it is either directly or indirect." on ", " under ",
"left", "right" etc. is only used for representing relative position relation, and after the absolute position for being described object changes, then the relative position is closed
System may also correspondingly change.
It is appreciated that ought such as layer, film, region or substrate etc element be referred to as be located at another element "above" or "below"
When, the element " direct " can be located at "above" or "below" another element, or there may be intermediary element.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of display base plate, including：Flexible substrates, the display device and encapsulated layer of formation on a flexible substrate, the envelope
Fill layer and cover the display device, it is characterised in that also include：
It is arranged on the protective layer in the flexible substrates, it is described protective layer used in by the position of the stress neuter layer of the display base plate
Control is put on the position of the encapsulated layer.
2. display base plate according to claim 1, it is characterised in that
The protective layer is located at side of the encapsulated layer away from the flexible substrates, and is in contact with the encapsulated layer.
3. display base plate according to claim 1, it is characterised in that
The flexible substrates have bent region, and the bent region is completely covered in the protective layer, so that will be described aobvious
Show that the position of the stress neuter layer in the bent region of substrate correspondence is controlled on the position of the encapsulated layer.
4. display base plate according to claim 2, it is characterised in that
The protective layer has at least one groove structure in the part in bent region, and the opening of the groove structure is towards far
From the side of the flexible substrates.
5. display base plate according to claim 4, it is characterised in that
The groove structure is shaped as polygon, hemispherical or spherical the section on its own bearing of trend.
6. display base plate according to claim 1, it is characterised in that
The protective layer at least includes a first sub- protective layer and a protective layer of son second, and the first sub- protective layer is by nothing
Machine material is formed, and the second sub- protective layer is formed by organic material, and is protected in the described first sub- protective layer and second son
When the quantity sum of sheath is more than or equal to 3, the first sub- protective layer and the second sub- protective layer are alternately arranged.
7. display base plate according to claim 1, it is characterised in that
The material of the protective layer includes：In propenyl polymer, urethane based polymers and epoxy-based polymerization thing
One or the combination of any several persons.
8. display base plate according to claim 7, it is characterised in that
The average thickness of the protective layer is 10um to 150um, and average elastic modulus is 100KPa to 1GPa.
9. a kind of preparation method of display base plate, including the step of form display device and encapsulated layer on a flexible substrate, institute
State encapsulated layer and cover the display device, it is characterised in that also include:
The step of protective layer being formed in the flexible substrates, it is described protective layer used in by the strain neutral layer of the display base plate
Position control on the position of the encapsulated layer.
10. a kind of display device, it is characterised in that including the display base plate as described in claim any one of 1-9.
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| CN201710515837.3A CN107134538A (en) | 2017-06-29 | 2017-06-29 | A kind of display base plate, preparation method and display device |
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| CN201710515837.3A CN107134538A (en) | 2017-06-29 | 2017-06-29 | A kind of display base plate, preparation method and display device |
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| CN108417730A (en) * | 2018-03-19 | 2018-08-17 | 京东方科技集团股份有限公司 | Flexible base board and preparation method thereof, display device |
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Application publication date: 20170905 |