CN208489237U - Organnic electroluminescent device - Google Patents
Organnic electroluminescent device Download PDFInfo
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- CN208489237U CN208489237U CN201821039717.7U CN201821039717U CN208489237U CN 208489237 U CN208489237 U CN 208489237U CN 201821039717 U CN201821039717 U CN 201821039717U CN 208489237 U CN208489237 U CN 208489237U
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Abstract
The utility model relates to field of display technology, disclose a kind of Organnic electroluminescent device, including the pixel confining layer being disposed on the substrate, the through-hole array for accommodating sub-pixel unit is offered in pixel confining layer, pixel confining layer offers several micropores far from the surface of substrate, and the inner wall of micropore is hydraulically rough surface.So that when preparing public carrier functional layer, being formed in pixel confining layer can have part to fall into micropore far from the public carrier functional layer on the surface of substrate, so that public carrier functional layer can disconnect on pixel confining layer surface, that is, the public carrier functional layer of each sub-pixel unit is discontinuous structure.Thus, when opening the sub-pixel unit of certain luminescent color, the driving voltage being applied on the sub-pixel unit will not be applied in the sub-pixel unit of other luminescent colors via public carrier functional layer, and the sub-pixel unit of other colors is avoided to be lighted simultaneously, effectively solve the problems, such as colour cast.
Description
Technical field
The utility model relates to field of display technology, and in particular to a kind of Organnic electroluminescent device.
Background technique
Display of organic electroluminescence (full name in English Organic Light Emitting Display, abbreviation OLED) is
Active luminous display unit, since it has many advantages, such as simple preparation process, at low cost, high contrast, wide viewing angle, low-power consumption,
And it is easily achieved colored display and large screen display, it is easy to accomplish and driver ic matches, is easily achieved flexibility
The advantages that display, is expected to become next-generation mainstream flat panel display, be attract attention in current flat panel display it is most
One of technology.
Fig. 1 shows the voltage-brightness curve graph of tri- sub-pixels of RGB in the full-color display device of pixel juxtaposition method.By scheming
It is found that the bright voltage that opens of tri- sub-pixels of RGB is inconsistent in existing OLED display device.Specifically, blue photons picture
The bright voltage that the bright voltage of element is greater than green light sub-pixel is greater than the bright voltage of feux rouges pixel.When practical application, brilliant blue is put
When sub-pixels, although voltage mainly across on blue subpixels, due to public hole injection layer electric conductivity compared with
It is good, therefore portion voltage can be applied in green light sub-pixel and/or feux rouges sub-pixel by public hole injection layer, due to red
The bright voltage of sub-pixels and green light sub-pixel is respectively less than the bright voltage of blue light sub-pixel, thus feux rouges sub-pixel and/or
Green light sub-pixel is easily lighted simultaneously.That is, feux rouges sub-pixel and/or the brightness of green light sub-pixel for emitting light are not in low ash rank
Low ash rank colour cast (partially red) phenomenon can occur in strict accordance with requiring to reach low-light level display effect.
Utility model content
For this purpose, technical problem to be solved in the utility model is in the prior art, OLED, which is shown, easily there is low ash rank color
Partially.
In order to solve the above technical problems, the technical solution adopted in the utility model is as follows:
The utility model provides a kind of Organnic electroluminescent device, including the pixel confining layer being disposed on the substrate, institute
The through-hole array offered in pixel confining layer for accommodating sub-pixel unit is stated, the pixel confining layer is far from the substrate
Surface offers several micropores, and the inner wall of micropore is hydraulically rough surface.
Optionally, each micropore is not less than the opening area close to the substrate far from the opening area of the substrate.
Optionally, opening area of each micropore far from the substrate is 0.25 μm2-80μm2。
Optionally, the depth of the micropore is not more than the thickness of the pixel confining layer.
Optionally, the depth of the micropore and the ratio of the pixel confining layer thickness are 5%-10%.
Optionally, the cross section of each micropore is at least one of polygon, round or ellipse.
Optionally, the roughness of the hydraulically rough surface is 10nm-100nm.
Optionally, the side wall of the micropore and/or bottom wall are additionally provided with lug boss.
Optionally, the protruding end of the lug boss is angular shape.
Optionally, the sub-pixel unit includes first electrode layer, the carrier that edge is stacked perpendicular to orientation substrate
Functional layer, organic luminous layer and the second electrode lay, the carrier functional layer extend to the pixel confining layer far from the base
On the surface of plate, and disconnected at the micropore.
The technical solution of the utility model has the advantages that
Organnic electroluminescent device provided by the embodiment of the utility model, offer in pixel confining layer vertically through it is logical
Hole array, the through-hole array is for accommodating sub-pixel unit, so that each sub-pixel unit is distributed in through-hole array not
In same through-hole.Pixel confining layer offers several micropores far from substrate surface, so that preparing each sub-pixel unit
When public carrier functional layer, portion can be had by being formed in pixel confining layer far from the public carrier functional layer on the surface of substrate
Divide and fall into micropore, so that public carrier functional layer can disconnect on pixel confining layer surface, that is, each sub-pixel list
The public carrier functional layer of member is discontinuous structure.As a result, when opening the sub-pixel unit of certain luminescent color, it is applied to
Driving voltage on the sub-pixel unit will not be applied to the sub-pixel list of other luminescent colors via public carrier functional layer
In member, the sub-pixel unit of other colors is avoided to be lighted simultaneously, effectively solves the problems, such as colour cast.
In addition, since the inner wall of micropore is hydraulically rough surface, the organic material for falling into micropore is easy by coarse micro-
Hole inner wall blocks, and makes its discontinuous structure.
Organnic electroluminescent device provided by the embodiment of the utility model, each micropore are not less than far from the opening area of substrate
Close to the opening area of substrate.That is, setting hopper structure wide at the top and narrow at the bottom for micropore, thus it is convenient for public carrier functional layer
In macromolecular material fall into micropore, be further ensured that public carrier functional layer can be in pixel confining layer far from substrate
It is disconnected on surface.
Organnic electroluminescent device provided by the embodiment of the utility model, the depth of micropore are not more than the thickness of pixel confining layer
Degree.That is, micropore is only opened in the inside of pixel confining layer, so that the material in public carrier functional layer only falls into pixel limit
Inside given layer, without falling on the substrate below pixel confining layer, it is avoided to pollute substrate.
Organnic electroluminescent device provided by the embodiment of the utility model, the cross section of each micropore be polygon, circle or
At least one of ellipse.The shape of micropore can self-setting according to actual needs, wider, the strong flexibility of selectivity, just
In popularization and use.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the voltage-brightness curve graph of tri- sub-pixels of RGB in existing display device；
Fig. 2 is a kind of structural schematic diagram of Organnic electroluminescent device provided by the embodiment of the utility model；
Fig. 3 is another structural schematic diagram of Organnic electroluminescent device provided by the embodiment of the utility model；
Fig. 4 is that the structure of micropore in the pixel confining layer of Organnic electroluminescent device provided by the embodiment of the utility model is shown
It is intended to；
Fig. 5-7 is three kinds of micropore in the pixel confining layer of Organnic electroluminescent device provided by the embodiment of the utility model
Distribution schematic diagram.
Appended drawing reference:
1- substrate；2- pixel confining layer；21- through-hole；22- micropore；221- lug boss；3- sub-pixel unit；The first electricity of 31-
Pole layer；32- carrier functional layer；33- organic luminous layer；34- the second electrode lay.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can also be the connection inside two elements, can be wireless connection, be also possible to wired connection.For the common skill of this field
For art personnel, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below is each other
Not constituting conflict can be combined with each other.
Firstly, it is necessary to explanation, current-carrying of the tradition when preparing Organnic electroluminescent device, in each sub-pixel unit
Subfunction layer is usually to share, and the general mask plate of big opening is usually used in the carrier functional layer of each sub-pixel unit
(common mask) preparation, that is, the carrier in carrier functional layer and adjacent subpixels unit in each sub-pixel unit
Functional layer is continuous structure.According to traditional driving method, when the sub-pixel unit to a kind of luminescent color applies driving voltage
When, portion voltage can be applied in adjacent subpixels unit by public carrier functional layer, if adjacent sub-pixel list
The bright voltage of member is lower, can be lighted simultaneously, thus just bring colour cast problem.
The utility model embodiment provides a kind of Organnic electroluminescent device, as shown in Figures 2 and 3, including is arranged in base
Pixel confining layer 2 on plate 1, offer in pixel confining layer 2 vertically through and through-hole 21 for accommodating sub-pixel unit 3
Array.That is, each sub-pixel unit 3 is distributed in through-hole 21 different in 21 array of through-hole.Pixel confining layer 2 is far from substrate 1
Surface offer several micropores 22.
When preparing the public carrier functional layer 32 of each sub-pixel unit 3 using the general mask plate of big opening as a result, shape
There can be part to fall into micropore 22 in the public carrier functional layer 32 on surface of the pixel confining layer 2 far from substrate 1, into
And public carrier functional layer 32 is disconnected on 2 surface of pixel confining layer.That is, the public load of each sub-pixel unit 3
Flowing subfunction layer 32 is discontinuous structure.As a result, when opening the sub-pixel unit 3 of certain luminescent color, it is applied to the sub- picture
Driving voltage on plain unit 3 will not be applied to the sub-pixel unit 3 of other luminescent colors via public carrier functional layer 32
In, it avoids the sub-pixel unit 3 of other colors from being lighted simultaneously, effectively solves the problems, such as colour cast.
In the present embodiment, the inner wall of micropore 22 is hydraulically rough surface, and the organic material for falling into micropore as a result, is easy to be coarse
Micropore inwall block, make its discontinuous structure.
In the present embodiment, each sub-pixel unit 3 include along the first electrode layer 31 being stacked perpendicular to 1 direction of substrate,
Carrier functional layer 32, organic luminous layer 33 and the second electrode lay 34；The luminescent color of each organic luminous layer 33 is not all the same.Its
In, first electrode layer 31 is anode, and the second electrode lay 34 is cathode or first electrode layer 31 is cathode, the second electrode lay 34
For anode.Carrier functional layer 32 is hole injection layer, hole transmission layer, electronic barrier layer, hole blocking layer, electron transfer layer
And in electron injecting layer it is any one or more layers.Wherein, carrier functional layer 32 and the second electrode lay 34 extend to pixel
On surface of the confining layers 2 far from substrate 1, carrier functional layer 32 disconnects at micropore 22, is discontinuous structure, the second electrode lay
It is not turned off at micropore 22, is continuous structure.
Sub-pixel unit 3 generally comprises feux rouges sub-pixel unit, green light sub-pixel unit and blue light sub-pixel unit, has
Corresponding machine luminescent layer 33 is red light luminescent layer, green light emitting layer, blue light-emitting.
In real work, feux rouges, green light, the wavelength of blue light are gradually short, and energy is gradually high.Therefore, generally, feux rouges sub-pixel list
The bright voltage of member is less than the bright voltage of blue light sub-pixel unit and green light sub-pixel unit.In traditional structure, opening
When opening blue light sub-pixel unit and/or green light sub-pixel unit, driving voltage is possible to be applied to via carrier functional layer
In feux rouges sub-pixel unit, so that feux rouges sub-pixel unit is lit.
And in the Organnic electroluminescent device provided by the present embodiment, since public carrier functional layer 32 is in pixel
It is cut off on surface of the confining layers 2 far from substrate 1, is discontinuous structure, therefore open blue light sub-pixel unit and/or green light
When pixel unit, driving voltage will not be applied in feux rouges sub-pixel unit via carrier functional layer 32, avoid feux rouges picture
Plain unit is lit simultaneously, solves the problems, such as colour cast.
As a kind of optional embodiment, in the present embodiment, opening area of each micropore 22 far from substrate 1 is not less than close
The opening area of substrate 1.That is, setting hopper structure wide at the top and narrow at the bottom for micropore 22, thus it is convenient for public carrier functional layer
Macromolecular material in 32 is fallen into micropore 22, is further ensured that public carrier functional layer 32 can be remote in pixel confining layer 2
It is disconnected on surface from substrate 1.But it is also not excluded for micropore 22 to be less than far from the opening area of substrate 1 close to the opening face of substrate 1
Long-pending structure, as long as can be realized the purpose of this utility model.
As a kind of optional embodiment, in the present embodiment, opening area of each micropore 22 far from substrate 1 is 10 μm2It is left
It is right；As the convertible embodiment of the application, opening area of each micropore 22 far from substrate 1 is 0.25 μm2-80μm2, can be with
It realizes the purpose of this utility model, belongs to the protection scope of the application.
As a kind of optional embodiment, in the present embodiment, the depth of micropore 22 is not more than the thickness of pixel confining layer 2.
That is, micropore 22 is only provided with the inside of pixel confining layer 2, so that the material in public carrier functional layer 32 only falls into picture
Inside plain confining layers 2, without falling on the substrate 1 of 2 lower section of pixel confining layer, it is avoided to pollute substrate 1.
As a kind of optional embodiment, in the present embodiment, the ratio of 2 thickness of depth and pixel confining layer of micropore 22 is
8%；As the convertible embodiment of the application, the ratio of 2 thickness of depth and pixel confining layer of micropore 22 is 5%-10%,
The purpose of this utility model may be implemented, belong to the protection scope of the application.
As a kind of optional embodiment, in the present embodiment, the cross section of each micropore 22 is polygon, round or ellipse
At least one of.The shape of micropore 22 can self-setting according to actual needs, wider, the strong flexibility of selectivity, convenient for pushing away
It is wide to use.
As a kind of optional embodiment, in the present embodiment, the roughness of hydraulically rough surface is 10nm-100nm.In micropore 22
The degree of roughness of wall determines the dynamic of the organic material fallen into micropore 22.If roughness is excessive, organic material is not easy to flow
It is dynamic, easily it is deposited in opening of the micropore 22 far from substrate 1；If roughness is too small, organic material easily keeps continuous state, is not easy
It disconnects.The roughness of 22 inner wall of micropore is arranged within the scope of 10nm-100nm in the present embodiment, on the one hand can be guaranteed organic
Material is easily disconnected by coarse inner wall, is on the other hand prevented organic material to be deposited in opening of the micropore 22 far from substrate 1, is facilitated
It falls into micropore 22.
As a kind of optional embodiment, in the present embodiment, open edge of the micropore 22 far from substrate 1 is wedge angle.As a result,
When carrier functional layer 32 is formed in 2 surface of pixel confining layer, organic material is fallen into before micropore 22,22 open edge of micropore
Wedge angle continuous carrier functional layer 32 can be cut off, further ensure that public carrier functional layer 32 is discontinuous.
As a kind of optional embodiment, as shown in figure 4, also being set on the side wall and/or bottom wall of micropore 22 in the present embodiment
It is equipped with lug boss 221, and 221 protruding end of lug boss is preferably angular shape.That is, after organic material is fallen into micropore 22,
The lug boss 221 of bottom wall or side wall can further be cut off organic material by the protruding end of angular shape.Wherein, lug boss
221 can be provided only on the side wall of micropore 22, can also be provided only on the bottom of micropore 22, and micropore 22 can also be arranged in simultaneously
Side wall and bottom wall, specifically how to be arranged can according to the actual situation depending on.
As a kind of optional embodiment, as shown in figure 5, micropore 22 is in M on 2 surface of pixel confining layer in the present embodiment
The modes such as the array arrangement of × N, such as 5 rows 4 column, 5 rows 5 column, 6 rows 5 column.As a kind of alternative embodiments, such as Fig. 6
Shown, the micropore 22 of even number line or odd-numbered line, which misplaces, arranges, in this way, helping to enhance the second electrode lay 34 and carrier functional layer
Adhesion strength between 32 and pixel confining layer 2 improves the reliability of the Organnic electroluminescent device.As another replaceable
Embodiment, as shown in fig. 7, micropore 22 can also be in irregular distribution on 2 surface of pixel confining layer.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes among the protection scope created still in the utility model.
Claims (10)
1. a kind of Organnic electroluminescent device, which is characterized in that described including the pixel confining layer (2) being arranged on substrate (1)
Through-hole (21) array for accommodating sub-pixel unit (3) is offered in pixel confining layer (2), the pixel confining layer (2) is remote
Surface from the substrate (1) offers several micropores (22), and the inner wall of the micropore (22) is hydraulically rough surface.
2. Organnic electroluminescent device according to claim 1, which is characterized in that each micropore (22) is far from the base
The opening area of plate (1) is not less than the opening area close to the substrate (1).
3. Organnic electroluminescent device according to claim 2, which is characterized in that each micropore (22) is far from the base
The opening area of plate (1) is 0.25 μm2-80μm2。
4. Organnic electroluminescent device according to claim 1, which is characterized in that the depth of the micropore (22) is not more than
The thickness of the pixel confining layer (2).
5. Organnic electroluminescent device according to claim 4, which is characterized in that the depth of the micropore (22) with it is described
The ratio of pixel confining layer (2) thickness is 5%-10%.
6. Organnic electroluminescent device according to claim 1, which is characterized in that the cross section of each micropore (22) is
At least one of polygon, round or ellipse.
7. Organnic electroluminescent device according to claim 1, which is characterized in that the roughness of the hydraulically rough surface is
10nm-100nm。
8. Organnic electroluminescent device according to claim 1, which is characterized in that the side wall of the micropore (22) and/or
Bottom wall is additionally provided with lug boss (221).
9. Organnic electroluminescent device according to claim 8, which is characterized in that the protruding end of the lug boss (221)
For angular shape.
10. Organnic electroluminescent device according to claim 1, which is characterized in that the sub-pixel unit (3) includes edge
First electrode layer (31), the carrier functional layer (32), organic luminous layer (33) and second being stacked perpendicular to orientation substrate
Electrode layer (34), the carrier functional layer (32) extend to the surface of the pixel confining layer (2) far from the substrate (1)
On, and disconnected at the micropore (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821039717.7U CN208489237U (en) | 2018-06-29 | 2018-06-29 | Organnic electroluminescent device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821039717.7U CN208489237U (en) | 2018-06-29 | 2018-06-29 | Organnic electroluminescent device |
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| Publication Number | Publication Date |
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| CN208489237U true CN208489237U (en) | 2019-02-12 |
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ID=65249193
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| CN201821039717.7U Active CN208489237U (en) | 2018-06-29 | 2018-06-29 | Organnic electroluminescent device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111710792A (en) * | 2020-06-30 | 2020-09-25 | 云谷（固安）科技有限公司 | Display panel and preparation method thereof |
-
2018
- 2018-06-29 CN CN201821039717.7U patent/CN208489237U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111710792A (en) * | 2020-06-30 | 2020-09-25 | 云谷（固安）科技有限公司 | Display panel and preparation method thereof |
| CN111710792B (en) * | 2020-06-30 | 2023-05-02 | 云谷（固安）科技有限公司 | Display panel and preparation method thereof |
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