CN109686868A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN109686868A CN109686868A CN201910099084.1A CN201910099084A CN109686868A CN 109686868 A CN109686868 A CN 109686868A CN 201910099084 A CN201910099084 A CN 201910099084A CN 109686868 A CN109686868 A CN 109686868A
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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
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/854—Arrangements for extracting light from the devices comprising scattering means
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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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
Abstract
The invention discloses a kind of display panel and display devices.The display panel includes: array substrate；Pixel defining layer has multiple open regions and the non-open region around open region positioned at the side of array substrate；Light emitting functional layer, including several organic luminescent devices, organic luminescent device are located in open region；Encapsulated layer, the side positioned at light emitting functional layer far from array substrate, encapsulated layer include the first film layer；Wherein, surface of first film layer far from light emitting functional layer includes the first scattering region, multiple first scattering micro-structurals of setting in the first scattering region, wherein the first scattering region is not be overlapped with open region in the orthographic projection of pixel defining layer.By means of the invention it is possible to improve the light extraction efficiency of OLED display panel.
Description
Technical field
The present invention relates to field of display technology, more particularly, to a kind of display panel and display device.
Background technique
Organic electroluminescent LED (Organic Light-Emitting Diodes, OLED), is made using organic material
For the semiconductor material in light emitting diode, when a current passes through, these organic materials will shine.OLED display technology tool
There are self-luminous, wide viewing angle, high contrast, low power consuming, is widely used in mobile phone, DV, laptop etc.
In product intelligent product.And due to its light weight, thickness is thin, has the characteristics that buckle resistance energy, is current lot of domestic and foreign
The research emphasis of person.
The light emitting functional layer of organic light emitting display panel be organic luminescence function layer (organic emitting layer,
EML), be typically covered with other film layers on organic luminescence function layer, thus the light that generates of organic luminescence function layer need through
Cross other film layers just and can enter the atmosphere outside display device.In conventional structure OLED device, due to different film materials
Optical property variations, light can generate loss in the form of total reflection inside display panel, and light extraction efficiency is low, and then influences OLED
Device light emitting efficiency and related optical performance.
Therefore it provides a kind of organic light emitting display panel and display device, the effective light out for improving OLED display panel
Efficiency is this field urgent problem to be solved.
Summary of the invention
In view of this, being shown the present invention provides a kind of display panel and display device with solving OLED in the prior art
The low technical problem of panel light extraction efficiency.
On the one hand, in order to solve the above-mentioned technical problems, the present invention provides a kind of display panels.
The display panel includes: array substrate；Pixel defining layer has multiple open regions positioned at the side of array substrate
With the non-open region for surrounding open region；Light emitting functional layer, including several organic luminescent devices, organic luminescent device are located at open region
It is interior；Encapsulated layer, the side positioned at light emitting functional layer far from array substrate, encapsulated layer include the first film layer；Wherein, the first film layer is remote
Surface from light emitting functional layer includes the first scattering region, multiple first scattering micro-structurals of setting in the first scattering region, wherein
First scattering region is not be overlapped with open region in the orthographic projection of pixel defining layer.
On the other hand, in order to solve the above-mentioned technical problems, the present invention provides a kind of display devices.
The display device includes any one display panel provided by the invention.
Compared with prior art, display panel provided by the invention and display device at least realize following beneficial effect
Fruit:
Scattering region is set far from the surface of light emitting functional layer in some film layer of encapsulated layer, is set in the scattering region
Scattering micro-structural is set, particularly, overcomes prior art prejudice, only scattering region is arranged in portion, so that scattering region
It is not be overlapped with open region namely not be overlapped with OLED device in the orthographic projection of pixel defining layer, on the one hand, to avoid scattering micro-structural
The light at positive visual angle is imported into big visual angle, so that scattering micro-structural does not influence the current efficiency of display panel；On the other hand, it dissipates
The total reflection phenomenon in micro-structure improvement display panel is penetrated, realizes the bigger light extraction extracting rate of display panel, it is therefore, real on the whole
The higher light extraction efficiency of display panel is showed.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Detailed description of the invention
It is combined in the description and the attached drawing for constituting part of specification shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 is the film layer structure schematic diagram of display panel described in the prior art；
Fig. 2 is the film layer structure schematic diagram of display panel described in an embodiment of the present invention；
Fig. 3 and Fig. 4 is the light extraction efficiency comparison diagram of display panel；
Fig. 5 to Fig. 7 is the schematic shapes of the scattering micro-structural of display panel provided in an embodiment of the present invention；
Fig. 8 is the schematic top plan view of the scattering micro-structural of display panel provided in an embodiment of the present invention；
Fig. 9 is the film layer structure schematic diagram of display panel described in another embodiment of the invention；
Figure 10 is the film layer structure schematic diagram of display panel described in another embodiment of the invention；
Figure 11 is the film layer structure schematic diagram of display panel described in another embodiment of the invention；
Figure 12 is the film layer structure schematic diagram of display panel described in another embodiment of the invention；
Figure 13 is the film layer structure schematic diagram of display panel described in another embodiment of the invention；
Figure 14 is the schematic diagram for the display device that an embodiment of the present invention provides.
Specific embodiment
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should also be noted that unless in addition having
Body explanation, the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to the present invention
And its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
In order to promote the light extraction efficiency of organic light emitting display panel, inventor is to organic light emitting display face in the prior art
Plate has carried out following research:
Fig. 1 is the film layer structure schematic diagram of display panel described in the prior art, as shown in Figure 1, display panel includes battle array
Column substrate 10', light emitting functional layer 20', pixel defining layer 30' and encapsulated layer 40'.Wherein, pixel defining layer 30' has multiple open
Mouth region 31' and non-open region 32' around open region 31', light emitting functional layer 20' includes several organic luminescent devices (OLED device
Part) 21', OLED device 21' is located in the 31' of open region.Encapsulated layer 40' is the stacking knot formed by several inorganic layers and organic layer
Structure, to be packaged to light emitting functional layer 20',
The light that light emitting functional layer 20' is generated, needs to be emitted by encapsulated layer 40', still, due to light emitting functional layer
Refractive index difference in the refractive index difference and encapsulated layer 40' of 20' and encapsulated layer 40' between different film layers, can make the function that shines
The some light of ergosphere 20', such as light L1' generate total reflection at a certain film layer in encapsulated layer 40', in display panel
Inside generates loss, influences light extraction efficiency.
In order to improve this problem, propose that setting increases light in the emission side side of light emitting functional layer 20' in the prior art
The scattering film layer of extraction efficiency, which includes scattering micro-structural, and the scattering film layer can cover entire viewing area, namely
The open region 31' of setting OLED device 21' and the non-open region 32' around open region 31' are covered, simultaneously with each by viewing area
The scattering micro-structural of a position improve the total reflection phenomenon of each position in viewing area can, to promote light taking-up
Rate.
But inventor is avoiding some light from producing the study found that for the scattering film layer at covering OLED device 21'
While raw total reflection, also the light at positive visual angle can be imported into big visual angle, so that the current efficiency of display panel is reduced, it is right
This, inventor further study show that, scattering micro-structural only is set in the corresponding position non-open region 32', it is opposite in viewing area
Each position covers for scattering micro-structural, the former light extraction extracting rate is bigger.
Based on the studies above, when promoting the light extraction efficiency of organic light emitting display panel, the application overcomes the prior art
The middle technology prejudice that scattering micro-structural is covered to entire viewing area proposes a kind of new technical thought, provided by the present application aobvious
Show in panel and display device, scattering region is arranged far from the surface of light emitting functional layer in a film layer in encapsulated layer, scattered at this
Setting scattering micro-structural in region is penetrated, particularly, scattering region is not be overlapped with open region in the orthographic projection of pixel defining layer, namely
It is not be overlapped with OLED device, on the one hand, to avoid scattering micro-structural that the light at positive visual angle is imported into big visual angle, on the other hand, dissipate
Micro-structure is penetrated again and can improved the total reflection phenomenon in display panel, realizes the bigger light extraction extracting rate of display panel.It below will be detailed
Display panel provided in an embodiment of the present invention and display device are carefully described.
Fig. 2 is the film layer structure schematic diagram of display panel described in an embodiment of the present invention, in one embodiment, such as
Shown in Fig. 2, display panel includes: array substrate 10, light emitting functional layer 20, pixel defining layer 30 and encapsulated layer 40.
Wherein, array substrate 10 includes substrate and the thin film transistor (TFT) array in substrate, when organic light emitting display face
When plate is folding flexible display panels, substrate uses, and there is any appropriate insulating materials flexible to be formed, for example, flexible
Substrate can be by such as polyimides (PI), polycarbonate (PC), polyether sulfone (PES), polyethylene terephthalate
(PET), polyethylene naphthalate (PEN), polyarylate (PAR) or fiberglass reinforced plastics (FRP) etc. polymerize
Object material is formed.When organic light emitting display panel is rigid display panel, substrate uses nonbreakable glass material.
Pixel defining layer 30 is formed in the side of array substrate 10, and close to thin film transistor (TFT) array, can be by such as gathering
The organic material of acid imide (PI), polyamide, benzocyclobutene (BCB), acryl resin or phenolic resin etc. is formed, and is had more
A open region 31 and non-open region 32 around open region 31.
Light emitting functional layer 20, including several organic luminescent devices 21, organic luminescent device 21 are located in open region 31.Specifically
Ground, organic luminescent device 21 include cathode, anode and the luminous organic material between cathode and anode, patterned anode
It is set in array substrate 10, and be electrically connected with thin film transistor (TFT)；The exposure of open region 31 anode of pixel defining layer 30, non-opening
The edge of the edges cover anode in area 32, luminous organic material are formed on the anode in open region 31 by evaporation process,
Then common cathode is set far from the side of anode in luminous organic material.Apply voltage between the anode and the cathode, then it is organic
Luminescent material emits visible light, and luminous organic material is different, and the color of the visible light of transmitting can be different, for example, light emitting functional layer
20 include organic light emitting device in blue color, red organic luminescent device and green organic luminescent device.
Encapsulated layer 40 is located at side of the light emitting functional layer 20 far from array substrate 10, for carrying out to organic luminescent device 21
Encapsulation, to protect organic luminescent device 21 and other film layers from the influence of outside moisture and oxygen etc..For flexible organic light emission
Display panel, encapsulated layer 40 are thin-film encapsulation layer, and thin-film encapsulation layer includes inorganic layer and organic layer, and inorganic layer and organic layer interlock
It stacks and realizes encapsulation.For example, encapsulated layer 40 is three layers of overlaying structure, including the first inorganic layer 40a, the second inorganic layer 40b and have
Machine layer 40c, it's not limited to that by certain the application, and for another example, encapsulated layer 40 can also be five layers of overlaying structure etc..In another feelings
Condition, encapsulated layer 40 or one layer of inorganic layer.
Encapsulated layer 40 includes the first film layer 41, which can be any film layer in encapsulated layer 40, Ke Yiwei
Organic layer, or inorganic layer, for example, showing the first film layer 41 in Fig. 2 is the second inorganic layer 40b.
No matter the first film layer 41 is which film layer in encapsulated layer 40, in the first table of the film layer 41 far from light emitting functional layer 20
Face is provided with the multiple first scattering micro-structural SM1 of setting in the first scattering region SA1, the first scattering region SA1, wherein the
One scattering region SA1 is not be overlapped with open region 31 in the orthographic projection of pixel defining layer 30.
First scattering micro-structural SM1 has scattering function, and the light that can be generated to light emitting functional layer 20 is scattered, example
Such as, light L1 can disperse to project, be arranged on 41 surface of the first film layer after the first scattering micro-structural SM1 from all directions
The first scattering micro-structural SM1, by scattering function reduce display panel inside total reflection, after part reflection light is scattered
It is emitted to organic light emitting display panel surface direction, reduces light loss, and then improve light extraction efficiency.Meanwhile first scatters
Region SA1 is not be overlapped with open region 31 in the orthographic projection of pixel defining layer 30, and can be avoided the first scattering micro-structural SM1 will face
The light at angle imported into big visual angle, so that the first scattering micro-structural SM1 does not influence the current efficiency of display panel.
Fig. 3 and Fig. 4 is the light extraction efficiency comparison diagram of display panel, wherein Fig. 3, which is shown, is not provided with scattering micro-structural
The light extraction efficiency curve P0 of display panel, the light extraction efficiency curve of the display panel of scattering micro-structural is covered with entire viewing area
P1, Fig. 4 show the light extraction efficiency curve P0 for being not provided with the display panel of scattering micro-structural, with scattering micro-structural not with opening
The light extraction efficiency curve P2 of the display panel of area overlapping, wherein three kinds of display panels are based on identical experiment parameter, and difference only exists
In whether the position of scattering micro-structural and scattering micro-structural.Data can be seen that the light for different wave length from figure, and light takes
The difference of extracting rate is different, and the visible wavelength range that display panel generates is between 380 nanometers to 700 nanometers, in the wavelength model
In enclosing, the display panel that scattering micro-structural is not proposed with the display panel of opening area overlapping namely the application, whole light is taken out
Rate is more excellent.Especially between 500 to 550 nanometers of wavelength, the display panel of scattering micro-structural is covered for entire viewing area,
Light extraction efficiency can be actually reduced, in the wave-length coverage, relatively entire viewing area covers the display panel of scattering micro-structural,
The light extraction efficiency superiority for the display panel that the application proposes is bigger.
In conclusion using the embodiment provide display panel, encapsulated layer some film layer far from light-emitting function
Scattering region is arranged in the surface of layer, and scattering micro-structural is arranged in the scattering region, particularly, overcomes prior art prejudice, only
Scattering region is arranged in portion, so that scattering region is not be overlapped with open region in the orthographic projection of pixel defining layer, namely
It is not be overlapped with OLED device, on the one hand, to avoid scattering micro-structural that the light at positive visual angle is imported into big visual angle, so that scattering micro- knot
Structure does not influence the current efficiency of display panel；On the other hand, scattering micro-structural improves the total reflection phenomenon in display panel, realizes
Therefore the bigger light extraction extracting rate of display panel realizes the higher light extraction efficiency of display panel on the whole.
It should be noted that the shape of the first scattering micro-structural SM1 shown in Fig. 2 is only to scattering micro- knot in the present invention
The exemplary representation of structure, scattering micro-structural is not limited to shape shown in Fig. 2, Ke Yiwei in display panel provided by the invention
Other arbitrary shapes.
As shown in Fig. 2, defining second direction z is the direction vertical with the plane where display panel, optionally, in one kind
In embodiment, the section of the first scattering micro-structural SM1 z in a second direction can be wavy shaped configuration.Fig. 5 to Fig. 7 is the present invention
The schematic shapes of the scattering micro-structural for the display panel that embodiment provides, as shown in Figures 5 to 7, the first scattering micro-structural can
To be V-type broached-tooth design as shown in Figure 5, the first scattering micro-structural may be trapezium structure as shown in FIG. 6 or first
Scattering micro-structural may be semicircular structure as shown in Figure 7, wherein the micro- knot of the scattering of wavy shaped configuration and semicircular structure
Structure, since its surface is curved surface, Curvature varying is big, smooth scattering function with higher, in curved surface after light capable of being made to be scattered
Upper relatively uniform outgoing, the angle of beam projecting is wide, is able to ascend the uniformity that display panel goes out light.
Fig. 8 is the schematic top plan view of the scattering micro-structural of display panel provided in an embodiment of the present invention, optionally, in one kind
In embodiment, as shown in Figure 7 and Figure 8, the distance between two adjacent first scattering micro-structural SM1 D is less than 380 nanometers, together
When, size of the first scattering micro-structural SM1 in three-dimensional space in all directions is respectively less than 380 nanometers, specifically, vertical
It is tieed up in display panel direction namely second direction z for first in three-dimensional space, with parallel with the plane where display panel
First direction x be three-dimensional space in second dimension, with it is parallel with the plane where display panel and with first direction x it is vertical
Third direction y is the third dimension in three-dimensional space, and in the three-dimensional space, the first scattering micro-structural SM1 is on second direction z
Height H, in a first direction the length L on x and the width W on second direction y, respectively less than 380 nanometers.
Using the embodiment provide display panel, by the scale definitions of the first scattering micro-structural visible wavelength with
Under, the light extraction efficiency of display panel can be further increased.
Optionally, in one embodiment, please continue to refer to shown in Fig. 2, the first film layer 41 is single layer structure.Forming the
After one film layer 41, first is formed in the first scattering region SA1 using corresponding technique according to the material of the first film layer 41
Scattering micro-structural SM1.For example, can form first when the first film layer 41 is the inorganic material of silica type by etching technics and dissipate
Penetrate micro-structure SM1.
The display panel provided using the embodiment only need to be in existing film layer when forming the first scattering micro-structural
The first scattering micro-structural is made, due to not increasing new film layer, without increasing new film layer processing procedure, saves cost.
It is the situation of single layer structure for the first film layer, the first film layer can be set by any film layer in encapsulated layer.
Wherein, in one embodiment, please continue to refer to shown in Fig. 2, encapsulated layer 40 includes the first inorganic layer 40a, second
Inorganic layer 40b and organic layer 40c, the second inorganic layer 40b are located at the first side of the inorganic layer 40a far from light emitting functional layer 20, have
Machine layer 40c is between the first inorganic layer 40a and the second inorganic layer 40b；First film layer 41 is the second inorganic layer 40b.
Using the embodiment provide display panel, the first scattering micro-structural between adjacent organic luminescent device,
When the inorganic layer surface far from light emitting functional layer makes the first scattering micro-structural, the first scattering micro-structural is apart from light emitting functional layer
Farther out, more light are enabled to scatter by the first scattering micro-structural, to further promote light extraction efficiency.
Fig. 9 is the film layer structure schematic diagram of display panel described in another embodiment of the invention, optionally, in another kind
In embodiment, as shown in figure 9, encapsulated layer 40 includes the first inorganic layer 40a, the second inorganic layer 40b and organic layer 40c, the second nothing
Machine layer 40b is located at the first side of the inorganic layer 40a far from light emitting functional layer 20, and organic layer 40c is located at the first inorganic layer 40a and
Between two inorganic layer 40b；First film layer 41 is the first inorganic layer 40a.
Figure 10 is the film layer structure schematic diagram of display panel described in another embodiment of the invention, optionally, in one kind
In embodiment, as indicated by 10, the first film layer 41 includes the first sub- film layer 411 and is located at the first sub- film layer 411 far from light-emitting function
Second sub- film layer 412 of 20 side of layer；The surface of second sub- film layer 412 includes the first scattering region SA1, the second sub- film layer 412
Refractive index be more than or equal to the first sub- film layer 411 refractive index, alternatively, the refractive index of the second sub- film layer 412 is less than the first sub- film
The refractive index and difference of layer 411 are less than 0.2, to reduce and avoid light in the friendship of the first sub- film layer 411 and the second sub- film layer 412
It is totally reflected on interface.
The display panel provided using the embodiment, the first film layer are the structure of at least two sub- film layers, wherein the first son
Film layer can be realized using inorganic material, to guarantee the packaging effect of encapsulated layer；On the basis of guaranteeing encapsulated layer packaging effect,
The index requirements of the two need to only be met, to guarantee that light can be incident to the second sub- film layer, so that the second sub- film material
It selects freer.For example, the second sub- film layer can be realized using organic film material, to form first on the second submodule layer
, can be by nano-imprint process when scattering micro-structural, craft precision is higher namely the state modulator essence of the first scattering micro-structural
Du Genggao, so as to further promote the light extraction efficiency of display panel.
Optionally, in one embodiment, with continued reference to FIG. 10, the second sub- film layer 412 is projected in pixel defining layer 30
It is not Chong Die with open region 31, it is not provided with the second sub- film layer 412 above open region 31, avoids facing light in the second sub- film layer
Light loss in 412.
Optionally, in one embodiment, please continue to refer to shown in Figure 10, encapsulated layer 40 includes the first inorganic layer 40a, the
Two inorganic layer 40b and organic layer 40c, the second inorganic layer 40b are located at the first side of the inorganic layer 40a far from light emitting functional layer 20,
Organic layer 40c is between the first inorganic layer 40a and the second inorganic layer 40b；First film layer 41 includes the second inorganic layer 40b and the
Two sub- film layers 412, that is, the first sub- film layer 411 is the second inorganic layer 40b.
The display panel provided using the embodiment, can be made on the basis of the structure of the specially offered encapsulated layer of the prior art
Second sub- film layer, when promoting display panel light extraction efficiency, without changing existing encapsulation layer process.Meanwhile first scattering it is micro-
Structure is between organic luminescent device, when the inorganic layer side far from light emitting functional layer makes the first scattering micro-structural, the
One scattering micro-structural farther out, enables more light to scatter by the first scattering micro-structural apart from light emitting functional layer,
To further promote light extraction efficiency.
Figure 11 is the film layer structure schematic diagram of display panel described in another embodiment of the invention, optionally, in one kind
In embodiment, as indicated at 11, encapsulated layer 40 includes the first inorganic layer 40a, the second inorganic layer 40b and organic layer 40c, and second is inorganic
Layer 40b is located at the first side of the inorganic layer 40a far from light emitting functional layer 20, and organic layer 40c is located at the first inorganic layer 40a and second
Between inorganic layer 40b；First film layer 41 includes the sub- film layer 412 of the first inorganic layer 40a and second, that is, the first sub- film layer 411 is
First inorganic layer 40a.
Optionally, in one embodiment, as in figures 9 or 11, when the first scattering micro-structural SM1 is located at organic layer
When 40c is close to 20 side of light emitting functional layer, non-open region 32 is completely covered in the first scattering region SA1 of setting, so that more light
Line passes through the first scattering micro-structural SM1, promotes the light extraction efficiency of display panel.
Figure 12 is the film layer structure schematic diagram of display panel described in another embodiment of the invention, optionally, in one kind
In embodiment, as shown in figure 12, the first film layer 41 includes the second inorganic layer 41b.Some light is emitted through organic luminescent device 21
Afterwards, successively pass through the first inorganic layer 40a, organic layer 40c and the first film layer 41, wherein the first film layer 41 is the second inorganic layer 41b
When, light injects air after the second inorganic layer 41b outgoing, and the first film layer 41 includes the second inorganic layer 41b and second inorganic
Layer 41b far from the side organic layer 40c other film layers when, light through the second inorganic layer 41b outgoing after inject other film layers, it
After inject air.Wherein, defining n0 is light by the refractive index for the material injected after the first scattering micro-structural SM1 outgoing, generally
The material that light is injected after being emitted by the first scattering micro-structural SM1 is air；N1 is the refraction of the material of the second inorganic layer 40b
Rate, n2 are the refractive index of the material of organic layer 40c, and n3 is the refractive index of the material of the first inorganic layer 40a, and d1 is the second inorganic layer
Thickness of the 40b at open region 31, d2 are the thickness of organic layer 40c, and d3 is the thickness of the first inorganic layer 40a.
The region that orthographic projection of the organic luminescent device 21 in pixel defining layer 30 is not overlapped with pixel defining layer 30 is the
One region A1, first area A1 include the first edge S1 and second edge S2 that x is oppositely arranged in a first direction, first direction x
The plane being parallel to where display panel；First scattering region SA1 includes third edge S3, and third edge S3 is in a first direction
The upper first scattering region SA1 of x is close to the edge of organic luminescent device 21；Along first direction x, first edge S1 to third edge S3
Distance be greater than second edge S2 to third edge S3 distance.
When being not provided with the first scattering micro-structural SM1 on display panel, the light of the most edge of organic luminescent device 21 generation
When interface between the second inorganic layer 41b and air is totally reflected, the propagation distance on x is X, root to light in a first direction
Separate according to optical path, propagation distance can be used following formula and calculate:
Sin θ 2=n0/n1, x1=tan θ 2*d1；
Sin θ 1=n1sin θ 2/n2, x2=tan θ 1*d2；
X3=x1；
X=x1+x2+x3；
In this embodiment, in a first direction on x, setting the distance between second edge S2 and third edge S3 d is less than
Distance threshold X, that is, the light for guaranteeing that the most edge of organic luminescent device 21 generates can also pass through the first scattering micro-structural SM1
It is scattered, can also reduce the probability that light is totally reflected at the first scattering region SA1, promote the light of display panel
Extraction efficiency.
Optionally, in one embodiment, please continue to refer to shown in Figure 12, with the first inorganic layer 40a and the second inorganic layer
40b is SiN material, and the thickness of the first inorganic layer 40a, organic layer 40c and the second inorganic layer 40b be respectively 1um, 8um and
1um, refractive index are respectively for 1.8,1.5 and 1.8, and distance threshold is 8.5 microns.
Figure 13 is the film layer structure schematic diagram of display panel described in another embodiment of the invention, optionally, in one kind
In embodiment, as shown at 13, the first film layer 41 includes that the first sub- film layer 411 and the second sub- film layer 412, the first sub- film layer 411 are leaned on
The surface of nearly second sub- film layer 412 includes that multiple second scatterings of the interior setting of the second scattering region SA2, the second scattering region SA2 are micro-
Structure SM2, wherein the second scattering region SA2 is not be overlapped with open region 31 in the orthographic projection of pixel defining layer 30.First sub- film layer
411 can be the second inorganic layer 40b of encapsulated layer 40.
The display panel provided using the embodiment, is increased scattering region in display panel, further promotes display surface
The light extraction efficiency of plate.
The above are the embodiments of display panel provided by the invention, and the present invention also provides a kind of display device, the displays
Device includes any one display panel provided by the invention, has its technical characteristic and corresponding technical effect, herein no longer
It repeats.
Figure 14 is the schematic diagram for the display device that an embodiment of the present invention provides, as shown in figure 14, the display device packet
Shell 01 and the display panel 02 in shell 01 are included, which is any one display surface provided by the invention
Plate.
Through the foregoing embodiment it is found that display panel provided by the invention and display device, at least realizing following has
Beneficial effect:
Scattering region is set far from the surface of light emitting functional layer in some film layer of encapsulated layer, is set in the scattering region
Scattering micro-structural is set, particularly, overcomes prior art prejudice, only scattering region is arranged in portion, so that scattering region
It is not be overlapped with open region namely not be overlapped with OLED device in the orthographic projection of pixel defining layer, on the one hand, to avoid scattering micro-structural
The light at positive visual angle is imported into big visual angle, so that scattering micro-structural does not influence the current efficiency of display panel；On the other hand, it dissipates
The total reflection phenomenon in micro-structure improvement display panel is penetrated, realizes the bigger light extraction extracting rate of display panel, it is therefore, real on the whole
The higher light extraction efficiency of display panel is showed.
Although some specific embodiments of the invention are described in detail by example, the skill of this field
Art personnel it should be understood that example above merely to being illustrated, the range being not intended to be limiting of the invention.The skill of this field
Art personnel are it should be understood that can without departing from the scope and spirit of the present invention modify to above embodiments.This hair
Bright range is defined by the following claims.
Claims (12)
1. a kind of display panel characterized by comprising
Array substrate；
Pixel defining layer has multiple open regions and the non-opening around the open region positioned at the side of the array substrate
Area；
Light emitting functional layer, including several organic luminescent devices, the organic luminescent device are located in the open region；
Encapsulated layer, the side positioned at the light emitting functional layer far from the array substrate, the encapsulated layer include the first film layer；
Wherein, surface of first film layer far from the light emitting functional layer includes the first scattering region, first fringe area
Multiple first scattering micro-structurals are set in domain, wherein orthographic projection and institute of first scattering region in the pixel defining layer
Open region is stated not to be overlapped.
2. display panel according to claim 1, which is characterized in that
First film layer is single layer structure.
3. display panel according to claim 1, which is characterized in that
First film layer include the first sub- film layer and positioned at the described first sub- film layer far from the light emitting functional layer side
Two sub- film layers；
The surface of the second sub- film layer includes first scattering region；
The refractive index of the second sub- film layer is more than or equal to the refractive index of the described first sub- film layer, alternatively, the second sub- film layer
Refractive index be less than the described first sub- film layer refractive index and difference less than 0.2.
4. display panel according to claim 3, which is characterized in that
The first sub- film layer includes the second scattering region close to the surface of the described second sub- film layer；
Multiple second scattering micro-structurals of setting in second scattering region, wherein second scattering region is in the pixel
The orthographic projection of definition layer and the open region be not be overlapped.
5. display panel according to claim 2 or 3, which is characterized in that
The encapsulated layer includes the first inorganic layer, the second inorganic layer and organic layer, and second inorganic layer is located at first nothing
Side of the machine layer far from the light emitting functional layer, the organic layer be located at first inorganic layer and second inorganic layer it
Between；
First film layer includes first inorganic layer.
6. display panel according to claim 5, which is characterized in that
The non-open region is completely covered in first scattering region.
7. display panel according to claim 2 or 3, which is characterized in that
The encapsulated layer includes the first inorganic layer, the second inorganic layer and organic layer, and second inorganic layer is located at first nothing
Side of the machine layer far from the light emitting functional layer, the organic layer be located at first inorganic layer and second inorganic layer it
Between；
First film layer includes second inorganic layer.
8. display panel according to claim 7, which is characterized in that
The region that orthographic projection of the organic luminescent device in the pixel defining layer is not overlapped with the pixel defining layer is
First area, the first area include the first edge and second edge being oppositely arranged in a first direction, the first direction
The plane being parallel to where the display panel；
First scattering region includes third edge, and the third edge is first fringe area in said first direction
Domain is close to the edge of the organic luminescent device；
In said first direction, the distance at the first edge to the third edge is greater than the second edge to described the
The distance at three edges, the distance between the second edge and the third edge are less than distance threshold X, wherein
Sin θ 2=n0/n1, x1=tan θ 2*d1；
Sin θ 1=n1sin θ 2/n2, x2=tan θ 1*d2；
X3=x1；
X=x1+x2+x3；
N0 is light by the refractive index for the material injected after first scattering micro-structural outgoing, and n1 is second inorganic layer
The refractive index of material, n2 are the refractive index of the material of the organic layer, and n3 is the refractive index of the material of first inorganic layer, d1
For thickness of second inorganic layer at the open region, d2 is the thickness of the organic layer, and d3 is first inorganic layer
Thickness.
9. display panel according to claim 8, which is characterized in that
The distance threshold is 8.5 microns.
10. display panel according to claim 1, which is characterized in that
The section of first scattering micro-structural in a second direction is V-type broached-tooth design, semicircular structure, wavy shaped configuration or ladder
Shape structure；
The second direction is vertical with the display panel.
11. display panel according to claim 1, which is characterized in that
The distance between described first scattering micro-structural of adjacent two, first scattering micro-structural are perpendicular to the display
The length and width of height and first scattering micro-structural on panel direction is respectively less than 380 nanometers, wherein described first
The length direction and width direction of scattering micro-structural are vertical, and parallel with the plane where the display panel.
12. a kind of display device, which is characterized in that including display panel described in any one of claims 1 to 11.
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