CN109037294A - Organic electroluminescent display panel and preparation method thereof, display device - Google Patents
Organic electroluminescent display panel and preparation method thereof, display device Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title abstract description 5
- 238000000034 method Methods 0.000 claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- 230000008569 process Effects 0.000 claims abstract description 22
- 239000000758 substrate Substances 0.000 claims description 40
- 239000000463 material Substances 0.000 claims description 33
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- 229920002050 silicone resin Polymers 0.000 claims description 4
- 238000002834 transmittance Methods 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 17
- 238000005538 encapsulation Methods 0.000 abstract description 15
- 239000011368 organic material Substances 0.000 abstract description 8
- 239000010408 film Substances 0.000 description 129
- 238000004806 packaging method and process Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 238000005401 electroluminescence Methods 0.000 description 5
- 239000010409 thin film Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000001764 infiltration Methods 0.000 description 4
- 230000008595 infiltration Effects 0.000 description 4
- 238000007641 inkjet printing Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
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- 238000010586 diagram Methods 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
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- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
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- 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
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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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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Abstract
The invention discloses organic electroluminescent display panels and preparation method thereof, display device.The production method includes the process for making pixel array and the process for making encapsulated layer, the luminescent layer and pixel defining layer of the pixel array, which enclose, sets out sunk area, and the process of the production encapsulated layer includes: to print the planarization layer formed by the first ink in the sunk area；The organic film formed by the second ink is printed above the planarization layer.Thus, organic film is formed on the basis of planarization layer, the levelling difficulty of organic film organic material can be reduced, and then reduce its flow time, so that the thickness of organic film is easy to control, the organic film for obtaining thinner thickness achievees the effect that reduce planarization layer and organic film integral thickness, improves encapsulation performance.
Description
Technical field
The present invention relates to field of display technology, and in particular, to organic electroluminescent display panel and preparation method thereof is shown
Showing device.
Background technique
Organic electroluminescent display panel achievees the purpose that luminous and display by electric current driving organic luminous layer, due to
The material of organic luminous layer can be chemically reacted with water and oxygen, when extraneous steam penetrates into organic electroluminescent display panel
Afterwards, the decline of device performance can be caused.In addition, the cathode of organic electroluminescent display panel generally uses active metal, very
It is easy to react with the steam penetrated, influences the injection of charge, further decrease the performance of device.Currently, usually adopting
Organic electroluminescent display panel is packaged with thin-film package (TFE encapsulation), it is mainly inorganic using inoranic membrane-organic film-
The packaged type of film, to improve the performance of device and extend the service life of device.
However, current organic electroluminescent display panel and preparation method thereof, display device still have much room for improvement.
Summary of the invention
The present invention be based on inventor couple on the fact that and problem discovery and understanding make:
The organic electroluminescent display panel of TFE encapsulation is used at present, and the organic film thickness in encapsulated layer is thicker, limit
The development of organic elctroluminescent device is made.Inventor by further investigation and many experiments discovery, this mainly by
During organic packages, the flow time of organic material is longer caused.Specifically, pixel array on substrate shines
There is sunk area between layer and pixel defining layer, influenced by concaveconvex structure, the surface tension of organic material is larger, causes
Its levelling is more difficult, it is difficult to be filled within a short period of time to above-mentioned sunk area.Improve the method master of the above problem at present
It to be the flow time of increase organic material, and the above method makes the thickness of the organic film above sunk area not easily-controllable
System, increases the thickness of above-mentioned organic film, influences the effect of thin-film package, and then limit organic elctroluminescent device
Development.
The present invention is directed to alleviate or solve the problems, such as at least one in above-mentioned refer at least to some extent.
In one aspect of the invention, the invention proposes a kind of production methods of organic electroluminescent display panel.It should
Production method includes the process for making pixel array and the process for making encapsulated layer, the luminescent layer and picture of the pixel array
Element, which defines layer and encloses, sets out sunk area, and the process of the production encapsulated layer includes: to print in the sunk area by the first ink
The planarization layer of formation；The organic film formed by the second ink is printed above the planarization layer.As a result, in planarization layer
On the basis of form organic film, the levelling difficulty of organic film organic material can be reduced, and then reduce its flow time, made
The thickness for obtaining organic film is easy to control, and obtains the organic film of thinner thickness, is reached and is reduced planarization layer and organic film
The effect of integral thickness improves encapsulation performance.
According to an embodiment of the invention, the process of the production encapsulated layer further comprises: forming the planarization layer
Before, the first inorganic film is formed far from the side of the substrate in the pixel defining layer and the luminescent layer；And
It is formed after the organic film, in side of the organic film far from the substrate, forms the second inorganic film.As a result,
The encapsulated layer with well packaged effect can be formed.
According to an embodiment of the invention, being formed before the organic film, further comprise: first ink is carried out
Curing process.The planarization layer formed after the first ink solidification as a result, can reduce the second ink printed in subsequent step
Levelling difficulty reduces its flow time, and then obtains the organic film of thinner thickness.
According to an embodiment of the invention, the planarization layer and the organic film are respectively by flexible material and viscosity
Dosage form at, wherein the flexible material for constituting the planarization layer and the organic film is separately selected from acrylic, ring
At least one of oxygen resin and silicone resin.Thus, it is possible to which being formed using above-mentioned material from a wealth of sources has certain viscosity
Planarization layer and organic film.
According to an embodiment of the invention, first ink viscosity is 15.0-18.0cps.The viscosity of first ink as a result,
It is lower, there is good mobility, it is possible to reduce fill and lead up the time of sunk area.
According to an embodiment of the invention, the viscosity of second ink is 20.3~22.3cps.Thus, it is possible to guarantee
Two ink have certain mobility, and form organic film convenient for subsequent cure processing.
According to an embodiment of the invention, the light transmittance deviation of the planarization layer and the organic film is less than 5%, Gu
Change order aberrations less than 5%.Thus, it is possible to guarantee the consistency of planarization layer and organic film, guarantee packaging effect.
In another aspect of this invention, the invention proposes a kind of organic electroluminescent display panels.It is according to the present invention
Embodiment, the organic electroluminescent display panel are made by mentioned-above method, and the organic electroluminescent is aobvious as a result,
Show panel have the advantages that whole features of the organic electroluminescent display panel of mentioned-above method production and, herein no longer
It repeats.Generally speaking, which has good encapsulation performance, service performance and longer use
Service life.
In another aspect of this invention, the invention proposes a kind of organic electroluminescent display panels.It is according to the present invention
Embodiment, the organic electroluminescent display panel include: substrate, and pixel array, the pixel array are provided on the substrate
Luminescent layer and pixel defining layer enclose and set out sunk area；The upper of the pixel array is arranged in encapsulated layer, the encapsulated layer
Side, the encapsulated layer includes the first inorganic film set gradually, planarization layer, organic film and the second inorganic film, institute
It states the first inorganic film to be arranged close to the pixel array, wherein the planarization layer is arranged in the sunk area.As a result,
The organic electroluminescent display panel has good encapsulation performance, service performance and longer service life.
In another aspect of this invention, the invention proposes a kind of display devices.According to an embodiment of the invention, the display
Device includes mentioned-above organic electroluminescent display panel, and the display device has mentioned-above organic electroluminescence as a result,
The whole features and advantage of light emitting display panel, details are not described herein.Generally speaking, which has good use
Performance and longer service life.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 shows the process signal of organic electroluminescent display panel production method according to an embodiment of the invention
Figure；
Fig. 2 shows the partial structure diagram of organic electroluminescent display panel according to an embodiment of the invention；
Fig. 3 shows the part process of organic electroluminescent display panel production method according to an embodiment of the invention
Schematic diagram；And
Fig. 4 shows the part stream of organic electroluminescent display panel production method in accordance with another embodiment of the present invention
Journey schematic diagram.
Description of symbols:
100: substrate；110: pixel defining layer；120: sunk area；130: luminescent layer；200: the first inorganic films；300:
Planarization layer；400: organic film；500: the second inorganic films；10: the first ink；20: the second ink.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
In one aspect of the invention, the invention proposes a kind of organic electroluminescent display panel production methods.As before
It is described, there is concaveconvex structure on the substrate of organic electroluminescent display panel, influenced by concaveconvex structure, the surface of organic material
Tension is larger, causes its levelling more difficult, it is difficult to be filled within a short period of time to above-mentioned pit.The prior art is using increase
The mode of organic material flow time is packaged organic film, and aforesaid way makes the thickness of organic film not easily-controllable
System, causes the thickness of organic film to increase, and influences the effect of encapsulation, and then limits the hair of organic elctroluminescent device
Exhibition.
According to an embodiment of the invention, planarization layer is initially formed, using planarization layer to recessed when carrying out organic packages
Sunken region is filled, and to fill and lead up sunk area, is formed even curface on substrate, is then formed on even curface
Organic film, in other words, the film forming procedure of organic film are greatly reduced without being filled to the sunk area of bottom side
The levelling difficulty for forming the second ink of organic film, reduces flow time, while can preferably be managed to film thickness,
And then the integral thickness of planarization layer and organic film is effectively reduced, improve the encapsulation of organic electroluminescent display panel
It can, service performance and prolong its service life.
According to an embodiment of the invention, the production method includes the process for making pixel array and the mistake for making encapsulated layer
Journey, the luminescent layer and pixel defining layer of pixel array, which enclose, sets out sunk area.The specific structure of pixel array and specific system
Make process to be not particularly limited, those skilled in the art can select known structure to constitute pixel battle array according to the actual situation
Column, manufacturing process can also be selected according to actual needs, and details are not described herein.With reference to Fig. 1, the process for making encapsulated layer is specific
Include:
S100: the planarization layer formed by the first ink is printed in sunk area
According to an embodiment of the invention, in this step, the planarization layer formed by the first ink is printed in sunk area.
According to an embodiment of the invention, being provided with pixel defining layer between the luminescent layer 130 of the pixel array on substrate 100 with reference to Fig. 2
110, thus, it is possible to position luminescent layer using pixel defining layer, and prevent from generating colour contamination between adjacent emissive layers.Root
It according to the embodiment of the present invention, is enclosed between luminescent layer 130 and pixel defining layer 110 and sets out sunk area 120, thus in substrate 100
Upper formation concaveconvex structure.
As previously mentioned, thin-film package mainly uses inorganic film-organic film-inorganic film packaged type, according to this
The embodiment of invention first forms the first inorganic film before forming planarization layer on substrate.Specifically, with reference in Fig. 3
(a), the side of pixel defining layer 110 and sunk area far from substrate 100 is arranged in the first inorganic film 200, thus, it is possible to
The infiltration for stopping extraneous steam using inorganic film, guarantees packaging effect.Production method and structure about the first inorganic film
It is not particularly limited at material, as long as can be realized its effect for stopping extraneous steam infiltration, those skilled in the art can
To be selected as the case may be.For example, according to an embodiment of the invention, can use chemical vapor deposition forms the first nothing
Machine film layer, the material for constituting the first inorganic film can be selected from SiO2、Si3N4And Al2O3At least one of.
According to an embodiment of the invention, preparing planarization layer after forming the first inorganic film.Reality according to the present invention
Example is applied, planarization layer can be by the formation of the first ink of inkjet printing, thus, it is possible to be formed using existing technique flat
Change layer.According to an embodiment of the invention, planarization layer can with through the following steps that formed: firstly, planarization layer will be constituted
Material and solvent be mixed to form the first ink, then, the first ink is provided only in sunk area, and sunk area is filled out
It is flat.
Specifically, with reference to Fig. 3, the dripping position of the first ink 10 is only position where sunk area (in such as Fig. 3
(a) shown in), planarization layer 300 (shown in (b) in such as Fig. 3) is formed in sunk area, the setting of planarization layer 300 is being recessed
First side of the inorganic film 200 far from substrate 100 in region, and surface of the planarization layer 300 far from 100 side of substrate with it is recessed
Region is fallen into flush far from the surface of 100 side of substrate.Planarization layer is only formed in sunk area as a result, utilizes planarization layer
Make sunk area that there is even curface, the levelling difficulty for forming the second ink of organic film in subsequent step can be reduced,
Its flow time is reduced, the organic film of thinner thickness is obtained.
It should be noted that the sunk area in the present embodiment should broadly understood: in sunk area and pixel defines
Layer is provided with the first inorganic film far from the surface of substrate side, and practical sunk area is on two neighboring pixel defining layer
The first inorganic film between region, therefore, the surface of planarization layer flushed with the surface of sunk area can for planarization
The upper surface of the first inorganic film on the pixel defining layer adjacent thereto of the surface of layer flushes, in other words, planarization layer
With the thickness of the first inorganic film and equal to the height of sunk area.Alternatively, the upper surface of planarization layer can be slightly less than pixel
Define the upper surface of the first inorganic film on layer.
Solvent about the first ink is not particularly limited, as long as can be formed with the material for constituting planarization layer for spraying
The liquid ink of ink printing, those skilled in the art can select as the case may be.Implementation according to the present invention
Example, the amount of the first ink are advisable with just filling sunk area, and concrete content is not particularly limited, and those skilled in the art can
To be designed according to the specific size of sunk area.
According to an embodiment of the invention, planarization layer is formed by flexible material and viscosity agent, wherein flexible material can be with
Selected from least one of acrylic, epoxy resin and silicone resin.Thus, it is possible to form tool using above-mentioned material from a wealth of sources
There is the planarization layer of certain viscosity.It according to a particular embodiment of the invention, can be by adjusting containing for planarization layer medium viscosity agent
Amount, so that the first ink viscosity is 15.0-18.0cps, the viscosity of the first ink is lower as a result, has good mobility, can
To reduce the time for filling and leading up sunk area.According to a particular embodiment of the invention, the first ink viscosity can for 16cps,
17cps。
According to an embodiment of the invention, forming planarization layer can also include carrying out curing process to the first ink, specifically
, make the first ink be changed into solid-state by liquid by cross-linking reaction.Thus, it is possible to which it is higher so that planarization layer is obtained flatness
Surface, the planarization layer formed after the first ink solidification can reduce the second oil that organic film is used to form in subsequent step
The levelling difficulty of ink, reduces its flow time, obtains the organic film of thinner thickness.
S200: the organic film formed by the second ink is printed above planarization layer
According to an embodiment of the invention, in this step, printing is formed organic by the second ink above planarization layer
Film layer.According to an embodiment of the invention, organic film is also possible to utilize the formation of the second ink of inkjet printing.Thus, it is possible to
Organic film is formed using existing technique.According to an embodiment of the invention, organic film can be through the following steps that form
: firstly, the material for constituting organic film and solvent are mixed to form the second ink, then, the second ink is arranged flat
Change the side of layer and pixel defining layer far from substrate.
Specifically, the dripping position of the second ink 20 is 110 place of planarization layer 300 and pixel defining layer with reference to Fig. 4
Position ((a) shown in) in such as Fig. 4, formed in planarization layer 300 and pixel defining layer 110 far from the side of substrate 100
Organic film 400 (shown in (b) in such as Fig. 4).Organic film, the film forming of organic film are formed on even curface as a result,
Process greatly reduces the levelling difficulty of the second ink, when reducing levelling without being filled to the sunk area of bottom side
Between, while film thickness can preferably be managed, and then effectively reduce the integral thickness of planarization layer and organic film,
It improves the encapsulation performance of organic electroluminescent display panel, service performance and prolongs its service life.
It should be noted that should make extensively in pixel defining layer far from the side setting organic film of substrate in the present embodiment
Reason and good sense solution: pixel defining layer is provided with the first inorganic film far from the surface of substrate side, therefore, really in pixel defining layer
On the first inorganic film far from substrate side be arranged organic film, to complete the encapsulation of organic film.
It is not particularly limited about the solvent for forming the second ink, is used as long as can be formed with the material for constituting organic film
In the liquid ink of inkjet printing, those skilled in the art can select as the case may be.
According to an embodiment of the invention, organic film is formed by flexible material and viscosity agent, wherein flexible material can be with
Selected from least one of acrylic, epoxy resin and silicone resin.Thus, it is possible to form tool using above-mentioned material from a wealth of sources
There is the organic film of certain viscosity.It according to a particular embodiment of the invention, can be by adjusting containing for organic film medium viscosity agent
Amount, so that the viscosity of the second ink is 20.3-22.3cps.Thus, it is possible to guarantee that the second ink has certain mobility, and
Organic film is formed convenient for subsequent cure processing.
According to an embodiment of the invention, forming organic film further includes carrying out curing process to the second ink, specifically, logical
Crossing cross-linking reaction makes the second ink be changed into solid-state by liquid.Thus, it is possible to obtain the higher organic film of flatness.
According to an embodiment of the invention, the light transmittance deviation of planarization layer and organic film, less than 5%, curing degree is inclined
Difference is less than 5%.Thus, it is possible to guarantee the consistency of planarization layer Yu machine film layer, guarantee packaging effect.Implementation according to the present invention
Example, the flexible material for constituting planarization layer can be identical as the flexible material of organic film is constituted, thus, it is possible to further increase
The packaging effect of organic film.Other embodiments according to the present invention, flexible material and the composition for constituting planarization layer are organic
The flexible material of film layer can be different, as long as meeting above-mentioned condition, to guarantee the encapsulation of organic electroluminescent display panel
Effect.
As previously mentioned, thin-film package mainly uses inorganic film-organic film-inorganic film packaged type, according to this
The second inorganic film is arranged far from the side of substrate in organic film after forming organic film in the embodiment of invention.Specifically
, with reference to (c) in Fig. 4, side of the organic film 400 far from substrate 100 is arranged in the second inorganic film 500, thus, it is possible to
The infiltration for stopping extraneous steam using inorganic film, guarantees packaging effect.Production method and structure about the second inorganic film
It is not particularly limited at material, as long as can be realized its effect for stopping extraneous steam infiltration, those skilled in the art can
To be selected as the case may be.For example, according to an embodiment of the invention, can use chemical vapor deposition forms the second nothing
Machine film layer, the material for constituting the second inorganic film can be selected from SiO2、Si3N4And Al2O3At least one of.
To sum up, the present invention is filled sunk area by InkJet printing processes twice to reduce the difficulty of thin-film package
Degree reduces the flow time of organic film organic material specifically, forming organic film on the basis of planarization layer, so that
The thickness of organic film is easy to control, and obtains the organic film of thinner thickness, reaches reduction planarization layer and organic film is whole
The effect of body thickness improves encapsulation performance.
In another aspect of this invention, the invention proposes a kind of organic electroluminescent display panels.It is according to the present invention
Embodiment, which can be is made by previously described method, and the organic electroluminescence is sent out as a result,
Light display panel have the advantages that whole features of the organic electroluminescent display panel of previously described method production and, herein
It repeats no more.Generally speaking, which has good encapsulation performance, service performance and longer
Service life.
In another aspect of this invention, the invention proposes a kind of organic electroluminescent display panels.It is according to the present invention
Embodiment, with reference to (c) in Fig. 4, which includes: substrate 100, the first inorganic film 200, flat
Change layer 300, organic film 400 and the second inorganic film 500.Wherein, the luminescent layer 130 of the pixel array on substrate 100 with
Pixel defining layer 110, which is enclosed, sets out sunk area, and the setting of the first inorganic film 200 is remote in pixel defining layer 110 and sunk area
Side from substrate 100, planarization layer 300 are arranged in sunk area, and are located at the first inorganic film 200 far from substrate 100
One layer, fill and lead up sunk area, organic film 400 is arranged in planarization layer 300 and pixel defining layer 110 far from substrate 100
Side, side of the organic film 400 far from substrate 100 is arranged in the second inorganic film 500.The organic electroluminescent as a result,
Display panel has good encapsulation performance, service performance and longer service life.
According to an embodiment of the invention, the organic electroluminescent display panel can be organic to be made using previous methods
Electroluminescence display panel, the organic electroluminescent display panel has the organic electroluminescence of previously described method production as a result,
The whole features and advantage of light emitting display panel, details are not described herein.
According to an embodiment of the invention, the light transmittance deviation of planarization layer 300 and organic film 400 less than 5%, solidifies
Order aberrations are less than 5%.Thus, it is possible to guarantee the consistency of planarization layer and organic film, guarantee packaging effect.According to this hair
Bright embodiment, planarization layer 300 and organic film 400 are separately formed by flexible material and viscosity agent, about
Detailed description has been carried out before the specific type of flexible material, details are not described herein.According to an embodiment of the invention, constituting
The flexible material of planarization layer 300 can be identical as the flexible material of organic film 400 is constituted, thus, it is possible to further increase
The packaging effect of organic film.Other embodiments according to the present invention, the flexible material for constituting planarization layer 300 have with composition
The flexible material of machine film layer 400 can be different, as long as meeting above-mentioned condition, to guarantee organic electroluminescent display panel
Packaging effect.
About the first inorganic film and the constituent material of the second inorganic film, before detailed description has been carried out,
This is repeated no more.
According to an embodiment of the invention, it is inorganic that planarization layer 300 is arranged in sunk area first with reference to (c) in Fig. 4
Side of the film layer 200 far from substrate 100, and surface and sunk area of the planarization layer 300 far from 100 side of substrate are far from substrate
The surface of 100 sides flushes.It is only provided with planarization layer in sunk area as a result, has sunk area using planarization layer
There is even curface, the organic film of thinner thickness can be obtained.
It should be noted that the sunk area in the present embodiment should broadly understood: in sunk area and pixel defines
Layer is provided with the first inorganic film far from the surface of substrate side, and practical sunk area is on two neighboring pixel defining layer
The first inorganic film between region, therefore, the surface of planarization layer flushed with the surface of sunk area can for planarization
The upper surface of the first inorganic film on the pixel defining layer adjacent thereto of the surface of layer flushes, in other words, planarization layer
With the thickness of the first inorganic film and equal to the height of sunk area.Alternatively, the upper surface of planarization layer can be slightly less than pixel
Define the upper surface of the first inorganic film on layer.
Similar, side of the pixel defining layer 110 far from substrate 100, which is arranged in, in organic film 400 broadly understood: as
Element defines layer and the surface of substrate side is provided with the first inorganic film, therefore, really on pixel defining layer
One inorganic film is provided with organic film far from the side of substrate, to realize the encapsulation of organic film.
It can be reduced about above-mentioned encapsulated layer and detailed description has been carried out before the principle of organic film thickness, herein not
It repeats again.
In another aspect of this invention, the invention proposes a kind of display devices.According to an embodiment of the invention, the display
Device includes previously described organic electroluminescent display panel, and the display device has previously described organic electroluminescence as a result,
The whole features and advantage of light emitting display panel, details are not described herein.Generally speaking, which has good use
Performance and longer service life.
In the description of the present invention, the orientation or positional relationship of the instructions such as term " on ", "lower" is based on the figure
Orientation or positional relationship is merely for convenience of the description present invention rather than requires the present invention that must be constructed and be grasped with specific orientation
Make, therefore is not considered as limiting the invention.
In the description of this specification, the description of reference term " one embodiment ", " another embodiment " etc. means to tie
The embodiment particular features, structures, materials, or characteristics described are closed to be included at least one embodiment of the present invention.At this
In specification, the schematic representation of the above terms does not necessarily have to refer to the same embodiment or example.Moreover, the tool of description
Body characteristics, structure, material or feature may be combined in any suitable manner in any one or more of the embodiments or examples.This
Outside, without conflicting with each other, those skilled in the art by different embodiments described in this specification or can show
The feature of example and different embodiments or examples is combined.In addition, it is necessary to illustrate, in this specification, term
" first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicate meaning
The quantity of the technical characteristic shown.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of production method of organic electroluminescent display panel, the production method include make the process of pixel array with
And the process of production encapsulated layer, the luminescent layer and pixel defining layer of the pixel array, which enclose, sets out sunk area, and feature exists
In the process of the production encapsulated layer includes:
The planarization layer formed by the first ink is printed in the sunk area；
The organic film formed by the second ink is printed above the planarization layer.
2. the method according to claim 1, wherein the process of the production encapsulated layer further comprises:
Before forming the planarization layer, in the side shape of the pixel defining layer and the luminescent layer far from the substrate
At the first inorganic film；And
After forming the organic film, in side of the organic film far from the substrate, the second inorganic film is formed.
3. further comprising the method according to claim 1, wherein being formed before the organic film:
Curing process is carried out to first ink.
4. the method according to claim 1, wherein the planarization layer and the organic film are independently
Ground is formed by flexible material and viscosity agent, wherein constitutes the flexible material point of the planarization layer and the organic film
Not independently selected from least one of acrylic, epoxy resin and silicone resin.
5. the method according to claim 1, wherein the viscosity of first ink is 15.0-18.0cps.
6. the method according to claim 1, wherein the viscosity of second ink is 20.3~22.3cps.
7. according to the method described in claim 4, it is characterized in that, the light transmittance of the planarization layer and the organic film
Deviation is less than 5%, and curing degree deviation is less than 5%.
8. a kind of organic electroluminescent display panel, which is characterized in that be by the described in any item method systems of claim 1-7
Make.
9. a kind of organic electroluminescent display panel characterized by comprising
Substrate, is provided with pixel array on the substrate, the luminescent layer and pixel defining layer of the pixel array enclose set out it is recessed
Fall into region；
The top of the pixel array is arranged in encapsulated layer, the encapsulated layer, and the encapsulated layer includes the first nothing set gradually
Machine film layer, planarization layer, organic film and the second inorganic film, first inorganic film are set close to the pixel array
It sets,
Wherein, the planarization layer is arranged in the sunk area.
10. a kind of display device, which is characterized in that including organic electroluminescent display panel described in claim 8 or 9.
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