CN106981502A - A kind of OLED display panel and preparation method thereof - Google Patents
A kind of OLED display panel and preparation method thereof Download PDFInfo
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- CN106981502A CN106981502A CN201710289144.7A CN201710289144A CN106981502A CN 106981502 A CN106981502 A CN 106981502A CN 201710289144 A CN201710289144 A CN 201710289144A CN 106981502 A CN106981502 A CN 106981502A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000000758 substrate Substances 0.000 claims abstract description 27
- 238000002347 injection Methods 0.000 claims description 22
- 239000007924 injection Substances 0.000 claims description 22
- 239000011368 organic material Substances 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000008033 biological extinction Effects 0.000 claims description 4
- 230000008020 evaporation Effects 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 4
- 238000007641 inkjet printing Methods 0.000 claims description 4
- 239000003086 colorant Substances 0.000 abstract description 12
- 239000010410 layer Substances 0.000 description 94
- 239000000463 material Substances 0.000 description 8
- 230000000007 visual effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000002346 layers by function Substances 0.000 description 3
- 238000005240 physical vapour deposition Methods 0.000 description 2
- 241001062009 Indigofera Species 0.000 description 1
- 150000004982 aromatic amines Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000002322 conducting polymer Substances 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- 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
- H10K59/80—Constructional details
- H10K59/875—Arrangements for extracting light from the devices
-
- 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
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
-
- 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
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
Abstract
The invention discloses a kind of OLED display panel and preparation method thereof, the OLED display panel includes：Substrate and the multiple pixel cells being arranged on substrate, each pixel cell include multiple sub-pixel units, wherein, sub-pixel unit includes stacked luminescent layer and light removing layer；In pixel cell, the thickness of the corresponding smooth removing layer of different subpixel unit is different, so that the difference for the brightness decay ratio that the light that different subpixel unit is sent changes with observation angle is less than given threshold.By the above-mentioned means, the present invention can be consistent the brightness decay ratio of different colours sub-pixel, reduce the colour cast of display picture.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of OLED display panel and preparation method thereof.
Background technology
Organic Light Emitting Diode (Organic Light-Emitting Diode, UIV OLED) is also known as organic electric laser
Display, organic luminous semiconductor (Organic Electroluminesence Display, UIV OLED).It is due to spontaneous
The features such as light, high contrast, wide colour gamut, fast-response, low-power consumption, has received more and more extensive research and application；Its is frivolous, can
The features such as flexure, more expands its application field, also brings bigger business opportunity.
But, increase with the area of OLED display panel, with the change at visual angle, the brightness decay ratio of the colors of R/G/B tri-
Example is inconsistent, and white state colour cast can be caused to increase.
The content of the invention
The present invention solves the technical problem of a kind of OLED display panel and preparation method thereof is provided, difference can be made
The brightness decay ratio of color sub-pixels is consistent, and reduces the colour cast of display picture.
In order to solve the above technical problems, one aspect of the present invention is：A kind of OLED display panel is provided, wrapped
Substrate and the multiple pixel cells being arranged on substrate are included, each pixel cell includes multiple sub-pixel units, wherein, sub- picture
Plain unit includes stacked luminescent layer and light removing layer；In pixel cell, the corresponding smooth removing layer of different subpixel unit
Thickness it is different set so that the difference for the brightness decay ratio that the light that different subpixel unit is sent changes with observation angle is less than
Determine threshold value.
In order to solve the above technical problems, another technical solution used in the present invention is：A kind of OLED display panel is provided
Preparation method, wherein, this method includes：One substrate is provided；Multiple sub-pixel units in pixel cell are made on substrate
Luminescent layer；The different light removing layer of thickness is made for different subpixel unit in pixel cell, so that different subpixel unit
The difference for the brightness decay ratio that the light sent changes with observation angle is less than given threshold.
The beneficial effects of the invention are as follows：It is different from the situation of prior art, the OLED display panel that the present invention is provided, including
Substrate and the multiple pixel cells being arranged on substrate, each pixel cell include multiple sub-pixel units, wherein, sub-pixel
Unit includes stacked luminescent layer and light removing layer；In pixel cell, the corresponding smooth removing layer of different subpixel unit
Thickness is different, so that the difference for the brightness decay ratio that the light that different subpixel unit is sent changes with observation angle is less than setting
Threshold value.By the above-mentioned means, can be consistent the brightness decay ratio of different colours sub-pixel, reduce the color of display picture
Partially.
Brief description of the drawings
Fig. 1 is the structural representation for the embodiment of OLED display panel one that the present invention is provided；
Fig. 2 is the profile of pixel cell in the embodiment of OLED display panel one that the present invention is provided；
Fig. 3 is the profile of pixel cell in another embodiment of OLED display panel that the present invention is provided；
Fig. 4 is the schematic flow sheet of the embodiment of preparation method one for the OLED display panel that the present invention is provided.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described.It is understood that specific embodiment described herein is only used for explaining the present invention, rather than to the limit of the present invention
It is fixed.It also should be noted that, it illustrate only part related to the present invention for the ease of description, in accompanying drawing and not all knot
Structure.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made
Every other embodiment, belongs to the scope of protection of the invention.
Referenced herein " embodiment " is it is meant that the special characteristic, structure or the characteristic that describe can be wrapped in conjunction with the embodiments
In at least one embodiment of the present invention.Each position in the description occur the phrase might not each mean it is identical
Embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art explicitly and
Implicitly understand, embodiment described herein can be combined with other embodiments.
OLED display panel provided in an embodiment of the present invention is mainly used in display device, including mobile phone, computer, television set
Deng.
Refering to Fig. 1, Fig. 1 is the structural representation for the embodiment of OLED display panel one that the present invention is provided, the OLED faces
Plate includes substrate 10 and the multiple pixel cells 20 being arranged on substrate, and each pixel cell 20 includes multiple sub-pixel units
30。
It should be understood that Fig. 1 is top view, the quantity of pixel cell 20 and sub-pixel unit 30 therein is only signal
Property, it is not restricted here.
Referring particularly to Fig. 2, Fig. 2 is the section of pixel cell in the embodiment of OLED display panel one that the present invention is provided
Figure.
In the present embodiment, illustrated so that a pixel cell 20 includes three sub-pixel units as an example, specifically, the
One sub-pixel unit 31, the second sub-pixel unit 32 and the 3rd sub-pixel unit 33.
In OLED display panel, mainly shown by light-emitting component self-luminous, therefore, each sub-pixel
Unit includes light-emitting component.Specifically, the first sub-pixel unit 31 includes the first luminescent layer 311, the second sub-pixel unit 32
Including the second luminescent layer 321, the 3rd sub-pixel unit 33 includes the 3rd luminescent layer 331.It should be understood that three sub-pixel units
Needed for send the color of light it is different, i.e. the first luminescent layer 311, the second luminescent layer 321 and the 3rd luminescent layer 331 are sent out
The color of the light gone out is different, specific color is not defined here.
In addition, in each sub-pixel, correspondence luminescent layer, which is additionally provided with light removing layer, the first luminescent layer 311, sets the
Being set on one smooth removing layer 312, the second luminescent layer 321 on second smooth removing layer 322, the 3rd luminescent layer 331 sets the 3rd light to take
Go out layer 332.Light removing layer is used to take out the light beam for being limited in and propagating in panel cavity body structure, increases the light of outgoing, so as to enter one
The electro-optical efficiency of step lifting OLED luminescent devices.Optionally, light removing layer can include a microlens array film and
At least optical thin film etc..
It should be understood that the luminous efficiency of the luminescent layer of different colours difference, with R (red), G (green), the colors of B (indigo plant) three
Exemplified by pixel, W (white) colors are by the mixture of colours of R, G, B tri-, if the brightness decay ratio of three colors is inconsistent, and color meeting distortion is
Colour cast increases；The attenuation ratio of corresponding three color is consistent, then is consistent when the brightness of R, G, B under any visual angle are with 0 ° of visual angle
, as long as W chromaticity coordinates when so ensure that 0 ° of visual angle, then big visual angle W chromaticity coordinates also can be normal.
Therefore, the light removing layer in the sub-pixel of different colours can be set to different-thickness by us, so as to adjust it
Brightness decay ratio, to improve colour cast.
Specifically, in pixel cell, the thickness of the corresponding smooth removing layer of different subpixel unit is set to difference, with
The difference for the brightness decay ratio that the light that different subpixel unit is sent changes with observation angle is set to be less than given threshold.
By the above-mentioned means, can reduce different colours sub-pixel sends the brightness decay ratio that light changes with observation angle
Difference, wherein, the thickness of light removing layer can be according to specific color come any adjustment, here not in different subpixel unit
It is construed as limiting.
Optionally, OLED display panel can also include the first functional layer 40 and the second functional layer 50, wherein, the first function
It can include electrode (anode/cathode) and hole/electron transfer layer, hole/electron injection in the functional layer 50 of layer 40 and second
Layer etc., is not construed as limiting here.
Refering to Fig. 3, Fig. 3 is the profile of pixel cell in another embodiment of OLED display panel that the present invention is provided,
The oled panel includes substrate 40 and is stacked anode 41, hole injection/transport layer 42, luminescent layer on the substrate 40
43rd, electronics output/transport layer 44, negative electrode 45, light removing layer 46.
Wherein, OLED display panel includes multiple pixel cells, and each pixel cell includes R sub-pixel units, G sub-pixel
Unit and B sub-pixel units, wherein, in luminescent layer 43, correspondence R sub-pixel units are R luminescent layers 431, correspondence G sub-pixel
Unit is G luminescent layers 432, and correspondence B sub-pixel units are B luminescent layers 433；Meanwhile, in light removing layer 46, correspondence R sub-pixels
Unit is R light removing layer 461, and correspondence G sub-pixel unit is G light removing layer 462, and correspondence B sub-pixel units are B light removing layers
463。
Wherein, light removing layer 46 is organic material, and its thickness is between 30-100nm, and its refraction coefficient is more than 1.8,
The extinction coefficient of 400-800nm wave bands is less than 0.01.The material of hole injection/transport layer 42 is preferably to have high hole mobility
Suitable material, the material of empty injection/cave transport layer 42 can specifically include but is not limited to：Organic material based on arylamine,
Conducting polymer and simultaneously there is block copolymer of conjugate moiety and non-conjugated portion etc..The material of luminescent layer 43 is preferably
It can be sent out by receiving and being combined the hole from hole injection/transport layer 42 and the electronics from electron injection/transport layer 44
Go out the material of visible ray.The material of electron injection/transport layer 44 is preferably the suitable material with high electron mobility.
Specifically, in the case of R light removing layer 461, G light removing layer 462, the consistency of thickness of B light removing layer 463, with
Brightness decay speed is when visual angle change, 0 ° of brightness contrast at 60 °：G<R<B, therefore to cause R, G, B brightness decay ratio
Example is consistent, and the thickness that need to cause the corresponding smooth removing layer of each sub-pixel unit is：B>R>G；That is B sub-pixel units, R pixel lists
The thickness-tapered of light removing layer in member, G pixel cells.
It should be understood that the light removing layer made for different materials, its brightness decay proportionate relationship might have change,
But still also can be by the adjustment of the thickness to R, G, B correspondence light removing layer so that its brightness decay ratio is consistent.Certainly,
It is unanimously perfect condition that its brightness decay ratio, which is adjusted to, in a particular embodiment, can be by the difference of its brightness decay ratio
Value is adjusted to given threshold, and such as 5%.
Moreover, it is noted that because the thickness of the corresponding smooth removing layer of different subpixel unit is different, therefore,
, it is necessary to be made respectively to the light removing layer of different subpixel unit during making light removing layer.Optionally, it can use organic
Material is made by way of evaporation or inkjet printing and obtained.
The oled panel Anodic that the present embodiment is provided is in lower section, and negative electrode up, in other embodiments, can also be by
Negative electrode is arranged below, and anode is up；I.e. oled panel includes substrate and the negative electrode being stacked on substrate, electronics note
Enter/transport layer, luminescent layer, hole injection/transport layer, anode, light removing layer.
In addition, hole injection/transport layer, the electron injection/transport layer mentioned in above-described embodiment are only functionally
Limit, do not limit it and only have one layer, for example, hole injection/transport layer can include hole injection layer and hole transmission layer
Two layers, or hole injection/transport layer is exactly that the same layer with hole transport is injected with hole；Meanwhile, in hole injection layer
With hole transmission layer be two layers when, the present embodiment does not also enter to the hierarchical relationship up and down between hole injection layer and hole transmission layer
Row is limited；Electron injection/transport layer similarly, is repeated no more here.
Refering to Fig. 4, Fig. 4 is the flow signal of the embodiment of preparation method one for the OLED display panel that the present invention is provided
Figure, this method includes：
S51：One substrate is provided.
Optionally, the substrate is transparent glass substrate, if oled panel is used for flexible display screen, the substrate can also be
Bent plastic base.
S52：The luminescent layer of multiple sub-pixel units in pixel cell is made on substrate.
S53：The different light removing layer of thickness is made for different subpixel unit in pixel cell, so that different subpixel list
The difference for the brightness decay ratio that the light that member is sent changes with observation angle is less than given threshold.
Wherein, S53 can be specifically included：Use organic material by way of evaporation or inkjet printing for different subpixel
The different light removing layer of thickness is made in unit；Wherein, the refraction coefficient of organic material is more than 1.8, and organic material is in 400-
The extinction coefficient of 800nm wave bands is less than 0.01.
In a specific embodiment, pixel cell includes R sub-pixel units, G sub-pixel unit and B sub-pixel lists
Member；Wherein, the thickness of the light removing layer in B pixel cells is more than the thickness of the light removing layer in R pixel cells, R pixel cells
In light removing layer thickness be more than G pixel cells in light removing layer thickness.
Optionally, it can also include between S51 and S52：Anode and hole injection/transport layer are made on substrate；
It can also include between S52 and S53：Electron injection/transport layer is made on luminescent layer.
Wherein, above-mentioned making hole injection/transport layer, luminescent layer, electron injection/transport layer and light removing layer can be used
The method of physical vapour deposition (PVD) or chemical vapor deposition makes, such as physical sputtering, spin coating, ink-jet, slot coated or light
One or more in the methods such as carving technology, are not construed as limiting here.
OLED display panel provided by above-described embodiment and preparation method thereof, can be regarded in display panel in order to widen
In the case of open country increase display area, by adjusting the thickness of light removing layer in different colours sub-pixel so that different colours are sub
The brightness decay ratio of pixel is consistent, and reduces the colour cast of display picture.On the one hand the image quality of display panel is improved,
On the other hand cost is also reduced.
Embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this
Equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, is included within the scope of the present invention.
Claims (10)
1. a kind of OLED display panel, including substrate and multiple pixel cells for being arranged on the substrate, each picture
Plain unit includes multiple sub-pixel units, it is characterised in that
The sub-pixel unit includes stacked luminescent layer and light removing layer；
In the pixel cell, the thickness of the corresponding smooth removing layer of the different sub-pixel units is different, so that different described
The difference for the brightness decay ratio that the light that sub-pixel unit is sent changes with observation angle is less than given threshold.
2. OLED display panel according to claim 1, it is characterised in that
Each pixel cell includes R sub-pixel units, G sub-pixel unit and B sub-pixel units, the B sub-pixels list
The thickness-tapered of light removing layer in first, described R pixel cells, the G pixel cells.
3. OLED display panel according to claim 1 or 2, it is characterised in that
The thickness of the smooth removing layer is between 30-100nm.
4. OLED display panel according to claim 1, it is characterised in that
The smooth removing layer is to make to obtain by the way of organic material is by evaporation or inkjet printing.
5. OLED display panel according to claim 4, it is characterised in that
The refraction coefficient of the organic material is more than 1.8, and the organic material is less than in the extinction coefficient of 400-800nm wave bands
0.01, the given threshold is less than 5%.
6. OLED display panel according to claim 1 or 2, it is characterised in that
The sub-pixel unit also includes anode, the hole injection/transport layer being arranged between the substrate and the luminescent layer,
And it is arranged on electric transmission/implanted layer, negative electrode between the luminescent layer and the smooth removing layer.
7. a kind of preparation method of OLED display panel, it is characterised in that including：
One substrate is provided；
The luminescent layer of multiple sub-pixel units in pixel cell is made on the substrate；
The different light removing layer of thickness is made for different subpixel unit in the pixel cell, so that the different sub-pixel lists
The difference for the brightness decay ratio that the light that member is sent changes with observation angle is less than given threshold.
8. preparation method according to claim 7, it is characterised in that
The pixel cell includes R sub-pixel units, G sub-pixel unit and B sub-pixel units；Wherein, the B pixel cells
In the thickness of light removing layer be more than the thickness of the light removing layer in the R pixel cells, the light in the R pixel cells takes out
The thickness of layer is more than the thickness of light removing layer in the G pixel cells.
9. preparation method according to claim 7, it is characterised in that described is different subpixel list in the pixel cell
Member makes the different light removing layer of thickness, including：
The different light of thickness is made in using organic material by way of evaporation or inkjet printing for different subpixel unit to take
Go out layer；
Wherein, the refraction coefficient of the organic material is more than 1.8, extinction coefficient of the organic material in 400-800nm wave bands
Less than 0.01.
10. preparation method according to claim 9, it is characterised in that described to make on the substrate in pixel cell
Multiple sub-pixel units luminescent layer, including：
Make on the substrate the anode of multiple sub-pixel units in pixel cell, hole injection/transport layer, luminescent layer,
Electric transmission/implanted layer and negative electrode.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710289144.7A CN106981502A (en) | 2017-04-27 | 2017-04-27 | A kind of OLED display panel and preparation method thereof |
| PCT/CN2017/085845 WO2018196074A1 (en) | 2017-04-27 | 2017-05-25 | Oled display panel and manufacturing method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710289144.7A CN106981502A (en) | 2017-04-27 | 2017-04-27 | A kind of OLED display panel and preparation method thereof |
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| CN201710289144.7A Pending CN106981502A (en) | 2017-04-27 | 2017-04-27 | A kind of OLED display panel and preparation method thereof |
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| WO (1) | WO2018196074A1 (en) |
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| CN107292294A (en) * | 2017-07-28 | 2017-10-24 | 京东方科技集团股份有限公司 | The display methods of display module and the display methods of display device |
| CN108417584A (en) * | 2018-03-12 | 2018-08-17 | 上海天马有机发光显示技术有限公司 | A kind of display panel and display device |
| CN108493210A (en) * | 2018-03-09 | 2018-09-04 | 上海天马有机发光显示技术有限公司 | A kind of organic light emitting display panel and its organic light-emitting display device |
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| CN110212011A (en) * | 2019-07-12 | 2019-09-06 | 昆山国显光电有限公司 | A kind of display panel and display device |
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