CN109742133A - Display panel and preparation method thereof and display device - Google Patents
Display panel and preparation method thereof and display device Download PDFInfo
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- CN109742133A CN109742133A CN201910152149.4A CN201910152149A CN109742133A CN 109742133 A CN109742133 A CN 109742133A CN 201910152149 A CN201910152149 A CN 201910152149A CN 109742133 A CN109742133 A CN 109742133A
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Abstract
The present invention relates to display device technical field, in particular to a kind of display panel and preparation method thereof and display device, display panel includes substrate, and the substrate includes viewing area and non-display area；Several organic electroluminescence structures are provided in the viewing area；It is provided at least one in the non-display area and stops dam and perforated area；The blocking dam is set between the viewing area and the perforated area；The side wall for stopping dam is provided at least one recessed portion, and the recessed portion is set to the side that the blocking dam closes on the perforated area.The present invention is deposited on the organic material of barrier dam side wall, the particle that heat radiation generates when avoiding due to laser boring falls off and causes package failure by stopping the side wall on dam to be provided at least one recessed portion when reducing vapor deposition.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of display panel and preparation method thereof and display devices.
Background technique
With the development of science and technology the digital display devices such as smart phone, tablet computer are widely used, wherein
Display screen is interpersonal communication interface indispensable in these display devices.Such as organic light emission (full name in English Orgnic
Light-Emitting Diode, abbreviation OLED) display panel, have that self-luminous, energy-saving, flexible, flexibility is good etc.
Advantage, and the display device that the realization is shown, do not need backlight, have the characteristics that reaction speed is fast and display effect is good,
By the concern of user, it is widely used in the end products such as smart phone, tablet computer.
With the fast development of electronic equipment, requirement of the user to screen accounting is higher and higher, so that electronic equipment is comprehensive
Screen is more and more paid close attention to by industry.In order to improve screen occupation rate, one is made a call to relatively with laser in the area AA in the prior art
The hole of size, camera or HOME key suitable for mobile phone.But when using laser boring, since laser energy is larger,
Laser energy, which is radiated, has large effect to the performance of display device.
Summary of the invention
One of the objects of the present invention is to provide a kind of display panels.
Another object of the present invention is to provide the methods for preparing above-mentioned display panel.
Another object of the present invention is to provide the display device with above-mentioned display panel.
For achieving the above object, on the one hand, the embodiment of the invention discloses a kind of display panel, including substrate, institutes
Stating substrate includes viewing area and non-display area；Several light emitting structures are provided in the viewing area；
It is provided at least one in the non-display area and stops dam and perforated area；The blocking dam is set to the display
Between area and the perforated area；
The side wall for stopping dam is provided at least one recessed portion, and the recessed portion is set to the blocking dam and closes on institute
State the side of perforated area.
As the further improvement of embodiment of the present invention, at least one described recessed portion includes bottom surface and the connection bottom
The side in face；
The angle of the side and the bottom surface is 70 ° -110 °.
As the further improvement of embodiment of the present invention, the side is circumferentia.
As the further improvement of embodiment of the present invention, at least one described recessed portion forms a cavity, the cavity
Shape be cylindrical body, Elliptic Cylinder, rotary table, inverted round stage, polygon prism, one kind or any combination thereof in hexahedron.
As the further improvement of embodiment of the present invention, at least one described blocking dam includes the first blocking dam and second
Stop dam；
Described first stops dam around the perforated area, and described second stops dam to stop dam around described first, described
At least one recessed portion, which is set to described first, to be stopped on dam.
As the further improvement of embodiment of the present invention, described first stops the section on dam to be isosceles trapezoid.
As the further improvement of embodiment of the present invention, height of at least one the described recessed portion on first blocking dam
Spend the setting of direction interval.
As the further improvement of embodiment of the present invention, described first stops the height of the relatively described substrate in dam to be greater than institute
State the height of the relatively described substrate in the second blocking dam.
As the further improvement of embodiment of the present invention, described first stops the cross sectional shape on dam to be right-angled trapezium；
It is described first blocking dam include close on the perforated area the first side wall and far from the perforated area second
Side wall, the first side wall and the bottom of the perforated area are rectangular.
As the further improvement of embodiment of the present invention, the material at least one blocking dam is carbon fiber, glass
One of fiber and carbon nanotube or any combination.
It further include encapsulated layer as the further improvement of embodiment of the present invention, the encapsulated layer is deposited on described several
Organic electroluminescence structure and at least one described blocking dam surface.
On the other hand, the embodiment of the invention also discloses a kind of display devices including above-mentioned display panel.
Another aspect, the embodiment of the invention discloses the production method of above-mentioned display panel, the production method includes:
Substrate is provided；
It is formed between the display area and non-display area of the substrate and stops dam；
At least one recessed portion is formed in the side that the blocking dam closes on the perforated area；
Several light emitting structures are formed in the display area of the substrate；
A perforated area is formed in the non-display area.
As the further improvement of embodiment of the present invention, production method further includes being formed to be deposited on several light-emitting junctions
Structure and the encapsulated layer for stopping dam surface.
As the further improvement of embodiment of the present invention, described between the viewing area and non-display area of the substrate
It is formed and dam is stopped to include: that deposition stops dam raw material on the substrate by the way of inkjet printing, silk-screen printing or coating；
The blocking dam is formed to stopping dam raw material to carry out curing process.
As the further improvement of embodiment of the present invention, the side that the perforated area is closed on the blocking dam
Forming at least one recessed portion includes:
At least one described recessed portion is formed by etching technics.
The invention has the following beneficial effects:
By stopping the side wall on dam to be provided at least one recessed portion, barrier dam side wall is deposited on when reducing vapor deposition
Organic material, generation radiation causes particle to fall off and in turn results in package failure when avoiding laser boring；
And the configuration of the present invention is simple is compact, low in cost, preparation step is simple, can be compatible with prior art.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen
Exemplary embodiment and its explanation please is not constituted an undue limitation on the present application for explaining the application；Wherein:
Fig. 1 is the structural schematic diagram of the display panel in an optional embodiment；
Fig. 2 is the structural representation of the short transverse interval setting recessed portion for stopping dam first in an optional embodiment
Figure；
Fig. 3 is to stop dam setting recessed portion structural schematic diagram in an optional embodiment；
Fig. 4 is to stop dam setting recessed portion structural schematic diagram in an optional embodiment；
Fig. 5 is the top view that dam structure is obstructed in display panel in an optional embodiment；
Fig. 6 is the structural schematic diagram that recessed portion side in an optional embodiment is circumferentia；
Fig. 7 is that the recessed portion side in an optional embodiment is wavy structural schematic diagram；
Fig. 8 is the first blocking dam cross sectional shape schematic diagram in an optional embodiment；
Example is expressed as in figure:
1- substrate；The viewing area 11-；12- non-display area；13- glass substrate；The first organic layer of 14-；15- inorganic barrier film
Layer；The second organic layer of 16-；2- stops dam；21- first stops dam；22- second stops dam；3- recessed portion；The bottom surface 31-；The side 32-
Face；4- perforated area；5- encapsulated layer；6- light emitting structure.
Specific embodiment
To keep the purposes, technical schemes and advantages of the application clearer, below in conjunction with the application specific embodiment
And technical scheme is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only this Shen
Please a part of embodiment, rather than whole embodiment.Based on the embodiment in the application, ordinary skill people
Member's every other embodiment obtained without making creative work, shall fall in the protection scope of this application.
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
It should be noted that attached drawing is all made of very simplified form and using non-accurate ratio, only to convenient, bright
The purpose of the embodiment of the present invention is aided in illustrating clearly.Wherein, be for the sake of clarity exaggerated layer, film, panel, region thickness
Degree.Also, in order to illustrate more clearly of the present invention, the component for being not directed to explanation is omitted from attached drawing, and identical appended drawing reference
Same parts are indicated in the text.
It should be understood that it can be straight when the element of such as layer, film, region or substrate is referred to as at another element "upper"
It connects on another element, or insertion element also may be present.In contrast, when element is referred to as " direct " in another element
Insertion element is not present in "upper".
As described in background, in order to improve screen occupation rate, the hole of a relative size is made a call to laser in the area AA, is fitted
Camera or HOME key for mobile phone.But when using laser boring, laser energy is larger, to the dike of barrier water oxygen
Dam generates heat radiation, is easy to cause the organic film being deposited on dykes and dams to rupture, generates a large amount of particulate matter, influence subsequent encapsulation,
And then influence device performance；Therefore, when carrying out thin-film package, there are the first floor inorganic layer SiN or Al2O3Can not effectively it adhere to
On dykes and dams, water oxygen is drilled to OLED film layer thus the problem of causing package failure by gap.
Based on this, the present invention provides a kind of display panel, structure is able to solve laser cutting heat radiation and causes not
The problem of good influence.Combined with specific embodiments below, it describes in detail to technical solution of the present invention.
A kind of display panel is disclosed in an optional embodiment of the invention, as shown in Figure 1, including substrate 1, substrate 1 is wrapped
Include viewing area 11 and non-display area 12；Several light emitting structures 6 are provided in viewing area 11；
It is provided at least one in non-display area 12 and stops dam 2 and perforated area 4；Dam 2 is stopped to be set to 11 He of viewing area
Between perforated area 4；In an optional embodiment, stopping the quantity on dam 2 is two, including first stops dam 21 and the second resistance
Dam 22；Second stops dam 22 to stop dam 21 to be arranged around first, and first stops dam 21 to be arranged around perforated area 4；Stop dam 2
The interface of different directions is formed with substrate 1, the interface of these different directions is conducive to block the propagation direction of crackle, thus further
It prevents crackle from extending to viewing area, achievees the purpose that reduce the chance that water oxygen enters viewing area, and then reduce water oxygen to light-emitting junction
The influence of structure such as organic electroluminescence structure, extends the service life of flexible display panels.
The side wall on dam 2 is stopped to be provided at least one recessed portion 3, recessed portion 3, which is set to, stops dam 2 to close on perforated area 4
Side；In an optional embodiment, recessed portion 3 is set on the first blocking dam 21, and on the first blocking dam 21 towards beating
The side of bore region 4.Recessed portion is set in the side wall for stopping dam, so that the area of side wall reduces, when vapor deposition is deposited on blocking dam
The organic material of side wall is reduced, and when avoiding laser boring, is fallen off because laser burn organic material generates a large amount of particles, and a large amount of
Particulate matter, which falls off, will cause package failure, and such design ensure that later period good packaging effect.
In an alternative embodiment, as shown in Fig. 2, recessed portion 3 includes bottom surface 31 and the side 32 for connecting bottom surface 31；Its
In, the angle of side 32 and bottom surface 31 is 90 °；In other enforceable modes, side 32 and the angle of bottom surface 31 can be
Any angle between 70 ° -110 °.Specifically, as shown in Figure 3 and Figure 4, the design of such slope surface extends water oxygen entrance
Path improves isolation water oxygen to a certain extent and enters the effect of viewing area, and while reducing vapor deposition to a greater degree is deposited on
Obstruct the organic material of dam side wall；Bottom surface 31 and side 32 or cambered surface；Specifically, side 32 is circumferentia or waveform
Curved surface, as shown in Figures 6 and 7, to be further reduced the organic material of deposition.
In an alternative embodiment, at least one recessed portion 3 forms a cavity, and the shape of cavity is hexahedron, at other
In enforceable mode, the shape of cavity can also for it is a kind of in cylindrical body, Elliptic Cylinder, rotary table, inverted round stage, polygon prism or its
Any combination.
Wherein, first stops the section on dam 21 to be isosceles trapezoid, and first stops dam 22 to stop around perforated area 4, second
Dam 22 stops dam 21 around first；Above-mentioned section is perpendicular to the section around direction, and the bottom of above-mentioned isosceles trapezoid is close to base
The surface of plate 1, surface of the upper bottom far from substrate 1, and upper bottom fall into the projection of bottom on substrate 1 in the projection of substrate 1；And
Recessed portion 3 stops the short transverse interval on dam 21 to be arranged first, specific as shown in Figure 2.In the sidewall spacers setting for stopping dam
Recessed portion 3, so that the area of side wall reduces as far as possible, the organic material that when vapor deposition is deposited on barrier dam side wall will be as much as possible
It reduces, avoids laser burn most possibly and a large amount of particles of organic material generation is caused to fall off, ensure that later period good envelope
Fill effect.
In an alternative embodiment, first, which stops the height of 21 opposing substrate 1 of dam to be greater than second, stops 22 opposing substrate of dam
1 height.It allows and stops the higher design of height on dam 21 to extend the route that water oxygen enters close to the first of perforated area 4, it can be with
More effective barrier water oxygen.
In other enforceable modes, as shown in figure 8, first stops the cross sectional shape on dam 21 that can be right-angled trapezium；
Wherein, the first blocking dam 21 includes the first side wall for closing on perforated area 4 and the second sidewall far from perforated area 4, wherein the
The bottom of one side wall and perforated area 4 is rectangular.Such angle setting is deposited on barrier dam side when further reducing vapor deposition
The organic material of wall avoids and causes package failure since a large amount of particles of laser burn organic material generation fall off.
In an alternative embodiment, the material for stopping dam 2 is one of carbon fiber, glass fibre and carbon nanotube or appoints
Meaning combination.
In an alternative embodiment, display panel includes glass substrate 13 and substrate 1, and substrate 1 includes relative to glass base
Plate 13 is successively layed in the first organic layer 14, inorganic barrier film layer 15, second organic layer on 13 surface of glass substrate from bottom to top
16；It further include encapsulated layer 5, encapsulated layer 5 is deposited on several light emitting structures 6 and at least one stops the surface on dam 2.Encapsulated layer
5 can be also arranged in region defined by blocking dam 2, so that by being hindered using stopping dam 2 to increase the interface of different directions
The propagation direction of failure crack, so that the crackle for preventing display panel edge from generating is extended to viewing area 11.
It include organic layer and inorganic layer in encapsulated layer 5, wherein organic layer is formed generally by the mode of inkjet printing, because
This first blocking dam 21 surround the outside that perforated area 4 can prevent organic layer ink to be diffused into substrate 1 when being formed；And by
Two blocking dams 22 are provided around the first blocking dam 21, can protect the edge of encapsulated layer 5.
In addition, organic encapsulation layer or organic and inorganic-organic composite encapsulated layer may be selected in encapsulated layer 5 in specific implementation.
Specifically, the advantages of organic material preparation thin-film encapsulation layer, it is preferable to essentially consist in flatness, may be implemented to planarize, after being conducive to
The continuous method by such as chemical vapor deposition (CVD), physical vapour deposition (PVD) (PVD) or atomic layer deposition (ALD) grows inorganic
Film layer；The biggish organic material of thickness, the bend resistance better performances of organic material can also be prepared by prior art.Specific
In embodiment, common organic material is mainly polymethyl methacrylate (PMMA) in OLED display panel preparation process.
It would generally be using the organic material in flash distillation hair and InkJet printing processes preparation thin-film encapsulation layer.Inorganic material
Major advantage is that water and oxygen barrier property is good compared with organic material, but its bend resistance ability for organic material is poor, and real
It is not easy to prepare the biggish inorganic film of thickness in the technique of border.The inorganic material preferably used in thin-film package are as follows: silica
(SiO2), silicon nitride (SiN), aluminium oxide (Al2O3), titanium oxide (TiO2).Wherein, the refractive index of silicon nitride and aluminium oxide is (fine and close
Property) it is better than silica and titanium oxide, so the water and oxygen barrier property of silicon nitride and aluminium oxide is better than silica and titanium oxide.
Thin-film package preferably using organic material and inorganic material combination by the way of, i.e., using inorganic material/organic material/
The laminated construction of inorganic material, specifically, following several combinations: silicon nitride/organic material/silicon nitride can be used；Oxygen
Change aluminium+silicon nitride/organic material/silicon nitride+aluminium oxide；Silica+silicon nitride/organic material/silicon nitride+silica.Certainly,
It can also be by the way of several layers of inorganic material laminations, for example, aluminium oxide+titanium oxide/aluminium oxide+titanium oxide/aluminium oxide+oxidation
Titanium/aluminium oxide+titanium oxide is made of the lamination of four aluminium oxide and titanium oxide, the water oxygen barriering effect of this combination
Preferably, simultaneously as the thinner thickness of every layer of inorganic material, still can use into flexible display apparatus.
On the other hand, the embodiment of the invention also discloses a kind of display devices including above-mentioned display panel；This implementation
Display device in example includes but is not limited to that mobile phone and plate, such as household electrical appliances, ticketing service pavilion, electronic information and game console etc. are electric
Sub- equipment.
Another aspect, the embodiment of the invention also discloses the production method of above-mentioned display panel, production method includes following
Specific steps:
S1, substrate is provided；
S2, blocking dam is formed between the display area and non-display area of the substrate；Form the specific side for stopping dam
Formula is that deposition stops dam raw material on substrate by the way of inkjet printing, silk-screen printing or coating；
S3, at least one recessed portion is formed in the side for stopping dam to close on the perforated area；At least one recessed portion is
It is formed by etching technics；
S4, several light emitting structures are formed in the display area of substrate；
S5, a perforated area is formed in non-display area；Laser boring forms an open perforated area；
S6, formation are deposited on several light emitting structures and stop the encapsulated layer on dam surface.
The invention has the following beneficial effects:
By stopping the side wall on dam to be provided at least one recessed portion, barrier dam side wall is deposited on when reducing vapor deposition
Organic material, avoids the heat radiation generated when laser boring luminous organic material is caused to burn a large amount of particles is caused to fall off in turn
Cause package failure；
And the configuration of the present invention is simple is compact, low in cost, preparation step is simple, can be compatible with prior art.
It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one
A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say
As a whole, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can for bright book
With the other embodiments of understanding.
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically
Protection scope that is bright, being not intended to limit the invention, it is all without departing from equivalent implementations made by technical spirit of the present invention or change
More it should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of display panel, which is characterized in that including substrate, the substrate includes viewing area and non-display area；
Several light emitting structures are provided in the viewing area；
It is provided at least one in the non-display area and stops dam and perforated area；The blocking dam be set to the viewing area and
Between the perforated area；
The side wall for stopping dam is provided at least one recessed portion, and the recessed portion is set to the blocking dam and closes on described beat
The side of bore region.
2. display panel as described in claim 1, which is characterized in that at least one described recessed portion includes bottom surface and connection institute
State the side of bottom surface；
The angle of the side and the bottom surface is 70 ° -110 °；
Preferably, the side is circumferentia.
3. display panel as described in claim 1, which is characterized in that at least one described recessed portion forms a cavity, described
The shape of cavity is cylindrical body, Elliptic Cylinder, rotary table, inverted round stage, one kind or any combination thereof in polygon prism hexahedron.
4. display panel as described in claim 1, which is characterized in that it is described at least one stop dam include first stop dam and
Second stops dam；
Described first stops dam around the perforated area, and described second stops dam to stop dam around described first, it is described at least
One recessed portion, which is set to described first, to be stopped on dam；
Preferably, described first stops the section on dam to be isosceles trapezoid；
Preferably, at least one described recessed portion stops the short transverse interval on dam to be arranged described first；
Preferably, described first stops the height of the relatively described substrate in dam to be greater than the described second height for stopping the relatively described substrate in dam
Degree；
Preferably, described first stops the cross sectional shape on dam to be right-angled trapezium；
It is described first blocking dam include close on the perforated area the first side wall and far from the perforated area second sidewall,
The first side wall and the bottom of the perforated area are rectangular.
5. display panel according to any one of claims 1-4, which is characterized in that further include encapsulated layer, the encapsulated layer is heavy
Product is in several light emitting structures and at least one described blocking dam surface.
6. a kind of display device, which is characterized in that including display panel as described in any one in claim 1-5.
7. a kind of production method of display panel, which is characterized in that the production method includes:
Substrate is provided；
It is formed between the viewing area and non-display area of the substrate and stops dam；
At least one recessed portion is formed in the side that the blocking dam closes on the perforated area；
Several light emitting structures are formed in the viewing area of the substrate；
A perforated area is formed in the non-display area.
8. the production method of display panel as claimed in claim 7, which is characterized in that the production method further include to be formed it is heavy
Product is in the encapsulated layer of several light emitting structures and blocking dam surface.
9. the production method of display panel as claimed in claim 7, which is characterized in that the viewing area in the substrate with
Blocking dam is formed between non-display area includes:
Deposition stops dam raw material on the substrate by the way of inkjet printing, silk-screen printing or coating；
The blocking dam is formed to stopping dam raw material to carry out curing process.
10. the production method of display panel as claimed in claim 7, which is characterized in that described to close on institute on the blocking dam
The side for stating perforated area forms at least one recessed portion and includes:
At least one described recessed portion is formed by etching technics.
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| CN110518147A (en) * | 2019-08-30 | 2019-11-29 | 京东方科技集团股份有限公司 | Display panel and its manufacturing method, display device |
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