CN106816551B - OLED display substrate and display device - Google Patents
OLED display substrate and display device Download PDFInfo
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- CN106816551B CN106816551B CN201611250045.XA CN201611250045A CN106816551B CN 106816551 B CN106816551 B CN 106816551B CN 201611250045 A CN201611250045 A CN 201611250045A CN 106816551 B CN106816551 B CN 106816551B
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- box dam
- oled display
- display substrate
- bulge
- box
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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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- Optics & Photonics (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention discloses a kind of oled display substrate and display devices.Oled display substrate includes display area and neighboring area, oled display substrate includes the encapsulating structure of the first box dam of the first box dam and covering positioned at neighboring area, first box dam includes along the multiple bulge-structures enclosed to arrangement, and at least two adjacent bulge-structures are connected in the side far from encapsulating structure.Using above-mentioned design, first box dam can play iris action to the organic encapsulation layer in encapsulating structure, and compared with prior art, the bending stress between the first box dam and encapsulating structure is smaller, bond area is larger, to effectively reduce the fault rupture or stripping of the first box dam and encapsulating structure.This embodiment improves the bending reliabilities of OLED display, extend the service life of OLED display.
Description
Technical field
The present invention relates to display technology fields, more particularly to a kind of OLED (Organic Light-Emitting
Diode, Organic Light Emitting Diode, abbreviation OLED) display base plate and display device.
Background technology
OLED display, since with thin, light, wide viewing angle, active is luminous, luminescent color is continuously adjustable, at low cost, loud
Answer that speed is fast, energy consumption is small, driving voltage is low, operating temperature range is wide, simple production process, luminous efficiency are high and can Flexible Displays
The advantages that, have been cited as the next-generation display technology of great development prospect.
Studies have shown that the ingredients such as steam and oxygen in air to the aging effects of OLED device in OLED display very
Greatly, this is because：It needs to inject electronics from cathode when OLED device works, it is more lower better that this requires cathode work function numbers, but cloudy
The metal materials such as pole generally use aluminium, magnesium, calcium, chemical property wave relatively more living, easily occur with the steam and oxygen penetrated
Reaction.In addition, steam and oxygen can also be chemically reacted with the hole transmission layer and electron transfer layer of OLED device, these
Reaction can all cause the failure of OLED device.Therefore OLED device is effectively encapsulated, makes each functional layer of OLED device
It is sufficiently spaced from ingredients such as steam, oxygen in air, so that it may aobvious to extend OLED to greatly prolong the service life of OLED device
The service life of showing device.
Currently, the display base plate (cross section structure is as shown in Figure 1) of OLED display when making, generally uses TFE
(Thin Film Encapsulation, thin-film package, abbreviation TFE) technology.Specific process step is as follows：It is being formed with OLED
The substrate periphery of device array 01 forms the organic box dam of twice 02；The shape on the organic box dam 02 of twice and OLED device array 01
At encapsulating structure.The encapsulating structure includes：It is formed in first inorganic on the organic box dam 02 of twice and OLED device array 01
Encapsulated layer 03, the organic encapsulation layer 04 being formed on the first inorganic encapsulated layer 03, be formed on organic encapsulation layer 04
Two inorganic encapsulated layers 05, wherein organic encapsulation layer 04 generally uses IJP (ink-jet printing, inkjet printing, IJP) work
Skill is formed in the inside of the organic box dam of twice 02, and being pre-formed for the organic box dam of twice 02 there is barrier to make organic encapsulation layer 04
With.
Present inventor has found during realizing the application, when oled display substrate is shown applied to flexibility OLED
When device or curved surface OLED display, in knee, there are larger bendings to answer between organic box dam 02 and encapsulating structure
Power easily generates fault rupture or stripping causes OLED device to lose to make steam and oxygen enter OLED device along gap
Effect.Therefore, the bending reliability of OLED display how is improved, the service life for extending OLED display is at present urgently
The technical issues of solution.
Invention content
The purpose of the embodiment of the present invention is to provide a kind of oled display substrate and display device, to improve OLED display
Bending reliability, extend the service life of OLED display.
The oled display substrate that the embodiment of the present invention is provided, including display area and neighboring area, the OLED are shown
Substrate includes the encapsulating structure of the first box dam and covering first box dam positioned at the neighboring area, first box dam
Include along the multiple bulge-structures enclosed to arrangement, at least two adjacent bulge-structures are in one far from the encapsulating structure
Side is connected.
Optionally, there is the oled display substrate at least one knee, the multiple bulge-structure to be distributed in described
First box dam is located at the part in the knee.
Optionally, the multiple bulge-structure is uniformly arranged in first box dam.
Optionally, first box dam is in closed circular, and the display area is located at the inside of the closed circular.
Optionally, first box dam includes surrounding several cricoid box dam sections, and each box dam section includes at least
Two bulge-structures, the display area are located at the annular internal that several described box dam sections surround.
Preferably, the quantity of first box dam is at least twice, the box dam section of the first box dam described in adjacent twice is staggered
Setting.
Preferably, the quantity of first box dam is at least twice, the bulge-structure phase of the first box dam described in adjacent twice
Mistake setting.
Preferably, the quantity of first box dam is twice or three.
Optionally, the bulge-structure is strip, and the length direction of the bulge-structure enclosing along first box dam
To setting, the bulge-structure cross section vertical with the length direction be rectangular, trapezoidal, semicircle, half elliptic or three
It is angular；Or
The bulge-structure is hemispherical, cube shaped, pyramid or prismatic table shape.
Preferably, the height of first box dam is 50~100 microns.
Preferably, the width of first box dam is 50~100 microns.
Preferably, the encapsulating structure includes：First for covering first box dam and being connected with first box dam
Inorganic encapsulated layer is located at side of the first inorganic encapsulated layer far from first box dam and the ring positioned at first box dam
Organic encapsulation layer inside shape, and cover first box dam and positioned at the organic encapsulation layer far from the described first inorganic envelope
Fill the second inorganic encapsulated layer of the side of layer, wherein the height and the difference in height of the bulge-structure of first box dam be not small
In the thickness of the organic encapsulation layer.
Optionally, the oled display substrate further includes positioned at the neighboring area and on the outside of first box dam
Second box dam, second box dam are not covered by the encapsulating structure.
In technical solution of the embodiment of the present invention, the first box dam of packed structure covering includes that edge is enclosed to the multiple of arrangement
Bulge-structure, at least two adjacent bulge-structures are connected in the side far from encapsulating structure, are enclosed using above-mentioned design, first
Dam can play iris action to the organic encapsulation layer in encapsulating structure, and compared with prior art, and the first box dam is tied with encapsulation
Bending stress between structure is smaller, and bond area is larger, to effectively reduce the first box dam and encapsulating structure fault rupture or
Stripping.This embodiment improves the bending reliabilities of OLED display, extend the service life of OLED display.
The embodiment of the present invention also provides a kind of display device, including the OLED display bases described in aforementioned any technical solution
Plate.There is the oled display substrate of the display device preferably bending reliability, the first box dam to be not likely to produce layer with encapsulating structure
Fracture or stripping, therefore, it is possible to effectively prevent oxygen and steam to enter and corrode OLED device, display device has longer make
Use the service life.
Description of the drawings
Fig. 1 is a kind of existing cross section structure schematic diagram of oled display substrate；
Fig. 2 is that the box dam structure schematic top plan view of one embodiment of the invention oled display substrate is (convex to highlight bulge-structure
It plays structure and uses different the fill styles from the other parts of the first box dam)；
Fig. 3 is the A-A of Fig. 2 to schematic cross-section；
Fig. 4 is that the first box dam of oled display substrate is bent schematic diagram with encapsulating structure in one embodiment of the invention；
Fig. 5 be another embodiment of the present invention oled display substrate box dam structure schematic top plan view (to highlight bulge-structure,
Bulge-structure uses different the fill styles from the other parts of the first box dam)；
Fig. 6 be further embodiment of this invention oled display substrate box dam structure schematic top plan view (to highlight bulge-structure,
Bulge-structure uses different the fill styles from the other parts of the first box dam).
Reference numeral：
Prior art part：
01-OLED device arrays
The organic box dams of 02-
03- the first inorganic encapsulated layers
04- organic encapsulation layers
05- the second inorganic encapsulated layers
Part of the embodiment of the present invention：
The neighboring areas 100-
The display areas 200-
The first box dams of 101-
The second box dams of 102-
110- encapsulating structures
1011- bulge-structures
110a- the first inorganic encapsulated layers
110b- organic encapsulation layers
110c- the second inorganic encapsulated layers
The knees 10-
1010- box dam sections
Specific implementation mode
In order to improve the bending reliability of OLED display, extend the service life of OLED display, the present invention is real
It applies example and provides a kind of oled display substrate and display device.To make the object, technical solutions and advantages of the present invention clearer,
Invention is further described in detail by the following examples.
As shown in Figure 2, Figure 3 and Figure 4, oled display substrate provided in an embodiment of the present invention, including display area 200 and week
Border region 100, oled display substrate include the envelope of the first box dam 101 of the first box dam 101 and covering positioned at neighboring area 100
Assembling structure 110, the first box dam 101 include along the multiple bulge-structures 1011 enclosed to arrangement, at least two adjacent bulge-structures
1011 are connected in the side far from encapsulating structure 110.
To realize that picture color is shown, oled display substrate further includes being located at display area 200 and being packaged structure 110 to cover
The OLED device array (not shown) of lid.First box dam 101 is arranged in the neighboring area of display base plate 100 and annular in shape,
First box dam 101 is enclosed to i.e. finger ring shape direction.
In technical solution of the embodiment of the present invention, the first box dam 101 that packed structure 110 covers includes that edge is enclosed to arrangement
Multiple bulge-structures 1011, at least two adjacent bulge-structures 1011 are connected in the side far from encapsulating structure 110, adopt
With above-mentioned design, encapsulating structure 110 can be packaged the OLED device array in display area 200, to make OLED devices
The ingredients such as each functional layer of part and steam, oxygen in air are sufficiently spaced from；First box dam 101 can be in encapsulating structure 110
Organic encapsulation layer 110b play iris action, and compared with prior art, between the first box dam 101 and encapsulating structure 110
Bending stress is smaller, and bond area is larger, to effectively reduce the fault rupture or stripping of the first box dam 101 and encapsulating structure 110
From.This embodiment improves the bending reliabilities of OLED display, extend the service life of OLED display.
In above-described embodiment, the particular number of the first box dam 101 is unlimited, these first box dams 101 are packaged structure 110
Covering.As shown in figure 5, in an alternative embodiment of the invention, oled display substrate may also include positioned at neighboring area 100 and be located at
Second box dam 102 in 101 outside of the first box dam, the 102 non-encapsulated structure covering of the second box dam.The effect of second box dam 102
It is similar with the first box dam 101, iris action can be played to the organic encapsulation layer in encapsulating structure, the second box dam 102 can be adopted
It can also be used due to the 102 non-encapsulated structure covering of the second box dam with structure type identical with the first box dam 101
Structure type identical with prior art box dam, the second box dam 102 can be identical with the material of the first box dam 101, can not also
Together, it is not specifically limited here.
Wherein, the specific material of the first box dam 101 and the second box dam 102 is unlimited, such as can be resin, modified organic material
The organic materials box dams such as material.First box dam 101 can be formed by a halftoning etching technics, can also be led to when making
Twice etching technique is crossed to be formed.
Encapsulating structure 110 generally comprises the multilayered structure being arranged alternately by inorganic layer and organic layer.As shown in figure 3, at this
It invents in the embodiment, encapsulating structure 110 includes：It covers first box dam 101 and is connected with first box dam 101
First inorganic encapsulated layer 110a positioned at sides of the first inorganic encapsulated layer 110a far from first box dam 101 and is located at
The organic encapsulation layer 110b of the annular internal of first box dam 101, and cover first box dam 101 and have positioned at described
Second inorganic encapsulated layer 110c of sides of the machine encapsulated layer 110b far from the first inorganic encapsulated layer 110a.Wherein, You Jifeng
Dress layer 110b generally formed using InkJet printing processes, in InkJet printing processes, dissolved with organic material ink droplet first
On the inside of box dam 101 and the first inorganic encapsulated layer 110a, and sprawling is spread out around, then cure, it is organic to be formed
Encapsulated layer 110b.Since ink has mobility before curing, the first box dam 101 has it as blocking boundary
Iris action.
As shown in Figure 2 and Figure 4, in one embodiment of the invention, oled display substrate has at least one knee
10, multiple bulge-structures 1011 are distributed in the part that the first box dam 101 is located at knee 10.Including the oled display substrate is aobvious
Showing device can realize at least one knee 10 and be bent that display device can be that can be realized at least one knee 10
The flexible display apparatus of bending and flattening, or in the stationary curved curved-surface display device at least one knee, by
Bending stress between the first box dam 101 and encapsulating structure positioned at knee 10 is smaller, and bond area is larger, therefore, shows
The bending reliability of showing device is preferable.
As shown in figure 5, in one embodiment of the invention, multiple bulge-structures 1011 are uniformly arranged in the first box dam
101.Including the display device of the oled display substrate may be implemented arbitrarily to fold, crimp, due to the first box dam 101 and encapsulation
Bending stress between structure is smaller, and bond area is larger, and therefore, the bending reliability of display device is preferable.
As shown in Figure 2 and Figure 5, in both these embodiments of the invention, the first box dam 101 is in closed circular, viewing area
Domain 200 is located at the inside of closed circular.As shown in fig. 6, in this embodiment of the invention, the first box dam 101 includes surrounding ring-type
Several box dam sections 1010, each box dam section 1010 include at least two bulge-structures 1011, display area 200 be located at it is several
The annular internal that a box dam section 1010 surrounds.In the embodiment, due between adjacent box dam section 1010 separately, between each other
There is no direct active force, therefore, it is possible to further decrease the bending stress of the first box dam 101 and encapsulating structure 110, to more
It is effective to reduce fault rupture or stripping.
As shown in fig. 6, further, the quantity of the first box dam 101 is set as at least twice, and (i.e. annular in shape first encloses
The quantity on dam 101 is at least two rings), the box dam section 1010 of the first box dam of adjacent twice 101 is staggered setting.I.e.：First with along with
One box dam section of adjacent first box dam of gap face between the two neighboring box dam section of box dam.Using InkJet printing processes
When forming organic encapsulation layer, if ink spreads the first box dam positioned at inner ring, the first box dam for being located at outer shroud can be right
It spreads the ink and plays barrier effect, to prevent ink from spreading further out.
Similarly, as shown in Figure 2, Figure 5 and Figure 6, when the quantity of the first box dam 101 is set as at least twice, adjacent two
The bulge-structure 1011 of the first box dam of road 101 is also staggered setting.I.e.：With along between the two neighboring bulge-structure of the first box dam
Adjacent first box dam of gap face a protrusion.When forming organic encapsulation layer using InkJet printing processes, if ink
Spreading the first box dam positioned at inner ring, then barrier effect can be played to spreading the ink by being located at the first box dam of outer shroud,
To prevent ink from spreading further out.
In the above embodiment of the present invention, the quantity of the first box dam 101 is preferably arranged to twice or three.Twice or three
The first box dam of road 101 can be attached together with 110 strength of encapsulating structure, the organic encapsulation layer that can be formed to subsequent technique
110b plays effective iris action, and since the width dimensions of occupied display base plate neighboring area are smaller, to aobvious
The frame size of showing device influences also smaller.
In the above embodiment of the present invention, the specific size specification of the first box dam 101 is unlimited, please refers to shown in Fig. 3, excellent
Choosing, the height t of the first box dam 1011It it is 50~100 microns, width l is 50~100 microns；The height t of first box dam 1011With
The height t of bulge-structure 10112Difference be not less than organic encapsulation layer 120 thickness c.
In the above embodiment of the present invention, the concrete shape of bulge-structure 1011 is unlimited, such as：Bulge-structure 1011 can
Think strip, and the length direction of bulge-structure 1011 enclosing to setting, bulge-structure 1011 and length side along the first box dam 101
It can rectangular, trapezoidal, semicircle, half elliptic or triangle to vertical cross section；In another example bulge-structure can also be in
Hemispherical, cube shaped, pyramid or prismatic table shape.
The embodiment of the present invention also provides a kind of display device, includes the oled display substrate of aforementioned any technical solution.It should
The oled display substrate of display device has a preferably bending reliability, the first box dam and encapsulating structure be not likely to produce fault rupture or
Stripping, therefore, it is possible to effectively prevent oxygen and steam to enter and corrode OLED device, display device uses the longevity with longer
Life.The concrete type of display device is unlimited, such as can be curved-surface display device or flexible display apparatus.
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 oled display substrate, including display area and neighboring area, which is characterized in that the oled display substrate includes
Positioned at the first box dam of the neighboring area and the encapsulating structure of covering first box dam, first box dam includes that edge is enclosed
To multiple bulge-structures of arrangement, at least two adjacent bulge-structures are connected in the side far from the encapsulating structure
It connects；
First box dam is annular in shape, and first box dam is enclosed to referring to the cyclic annular direction.
2. oled display substrate as described in claim 1, which is characterized in that the oled display substrate has at least one curved
At song, the multiple bulge-structure is distributed in the part that first box dam is located at the knee.
3. oled display substrate as described in claim 1, which is characterized in that the multiple bulge-structure is uniformly arranged in described
First box dam.
4. oled display substrate as described in claim 1, which is characterized in that first box dam is in closed circular, described aobvious
Show that region is located at the inside of the closed circular.
5. oled display substrate as described in claim 1, which is characterized in that first box dam is cricoid several including surrounding
A box dam section, each box dam section include at least two bulge-structures, and the display area is located at described several and encloses
The annular internal that monolith surrounds.
6. oled display substrate as claimed in claim 5, which is characterized in that the quantity of first box dam is at least twice,
The box dam section of first box dam described in adjacent twice is staggered setting.
7. oled display substrate as described in claim 1, which is characterized in that the quantity of first box dam is at least twice,
The bulge-structure of first box dam described in adjacent twice is staggered setting.
8. oled display substrate as described in claim 1, which is characterized in that the quantity of first box dam is twice or three
Road.
9. oled display substrate as described in claim 1, which is characterized in that
The bulge-structure is strip, and the length direction of the bulge-structure enclosing to setting along first box dam is described
The bulge-structure cross section vertical with the length direction be rectangular, trapezoidal, semicircle, half elliptic or triangle；Or
The bulge-structure is hemispherical, cube shaped, pyramid or prismatic table shape.
10. oled display substrate as described in claim 1, which is characterized in that the height of first box dam is 50~100 micro-
Rice.
11. oled display substrate as described in claim 1, which is characterized in that the width of first box dam is 50~100 micro-
Rice.
12. oled display substrate as described in claim 1, which is characterized in that the encapsulating structure includes：Cover described first
Box dam and the first inorganic encapsulated layer being connected with first box dam are located at the first inorganic encapsulated layer far from described first
The organic encapsulation layer of the side of box dam and annular internal positioned at first box dam, and covering first box dam and be located at
Second inorganic encapsulated layer of side of the organic encapsulation layer far from the first inorganic encapsulated layer, wherein first box dam
The difference in height of height and the bulge-structure be not less than the thickness of the organic encapsulation layer.
13. such as claim 1~12 any one of them oled display substrate, which is characterized in that the oled display substrate is also
Include the second box dam positioned at the neighboring area and on the outside of first box dam, second box dam is not by the encapsulation
Structure covers.
14. a kind of display device, which is characterized in that including such as claim 1~13 any one of them oled display substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611250045.XA CN106816551B (en) | 2016-12-29 | 2016-12-29 | OLED display substrate and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611250045.XA CN106816551B (en) | 2016-12-29 | 2016-12-29 | OLED display substrate and display device |
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| CN106816551A CN106816551A (en) | 2017-06-09 |
| CN106816551B true CN106816551B (en) | 2018-09-21 |
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| CN201611250045.XA Active CN106816551B (en) | 2016-12-29 | 2016-12-29 | OLED display substrate and display device |
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| CN107146858B (en) | 2017-07-12 | 2019-02-26 | 京东方科技集团股份有限公司 | Organic luminescent assembly and preparation method thereof, display device |
| CN107195803B (en) * | 2017-07-21 | 2019-02-12 | 京东方科技集团股份有限公司 | Display panel and its manufacturing method, display device |
| CN107170792A (en) * | 2017-07-24 | 2017-09-15 | 京东方科技集团股份有限公司 | Flexible oled display substrate and preparation method thereof and display device |
| CN109309107A (en) * | 2017-07-26 | 2019-02-05 | 上海和辉光电有限公司 | A kind of display panel and display device |
| CN107689425A (en) * | 2017-08-31 | 2018-02-13 | 昆山国显光电有限公司 | Thin-film packing structure and film encapsulation method and display panel |
| CN107768544A (en) * | 2017-09-25 | 2018-03-06 | 深圳市华星光电半导体显示技术有限公司 | A kind of manufacturing method thereof of glass substrate, OLED and glass substrate |
| CN107799665A (en) * | 2017-10-26 | 2018-03-13 | 京东方科技集团股份有限公司 | Thin-film packing structure, display device and method for packing |
| CN107863454A (en) * | 2017-11-21 | 2018-03-30 | 武汉华星光电半导体显示技术有限公司 | Flexible OLED display panel and its method for packing |
| US10629850B2 (en) | 2017-11-21 | 2020-04-21 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Flexible OLED display panel and encapsulation method thereof |
| CN108565353B (en) | 2018-04-20 | 2020-03-06 | 京东方科技集团股份有限公司 | Display back plate and display device |
| US11271185B2 (en) | 2019-02-27 | 2022-03-08 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Display structure having a dam and gap |
| CN109920929B (en) * | 2019-02-27 | 2020-07-10 | 武汉华星光电半导体显示技术有限公司 | Display structure |
| CN111768697B (en) * | 2020-06-16 | 2022-04-01 | 武汉华星光电半导体显示技术有限公司 | Flexible display panel and preparation method thereof |
| CN113093441A (en) * | 2021-03-31 | 2021-07-09 | 重庆烯宇新材料科技有限公司 | Novel liquid optical cement full-lamination box dam technology |
| CN113410418B (en) * | 2021-06-16 | 2024-02-20 | 京东方科技集团股份有限公司 | Packaging method, display panel and display device |
| CN113809265B (en) * | 2021-08-30 | 2024-02-06 | 武汉天马微电子有限公司 | Display panel and display device |
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