CN107591434A - Organic electroluminescence display panel, preparation method and display device - Google Patents
Organic electroluminescence display panel, preparation method and display device Download PDFInfo
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- CN107591434A CN107591434A CN201710900263.1A CN201710900263A CN107591434A CN 107591434 A CN107591434 A CN 107591434A CN 201710900263 A CN201710900263 A CN 201710900263A CN 107591434 A CN107591434 A CN 107591434A
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Abstract
The invention provides a kind of organic electroluminescence display panel, preparation method and display device, the organic electroluminescence display panel includes：Substrate, pixel electrode layer, barricade and organic light-emitting units；The pixel electrode layer is located on substrate, wherein, pixel electrode layer includes multiple pixel electrodes, pixel electrode includes fringe region and the central area Jing Guo plasma treatment, fringe region surrounds central area, and the work function of central area is more than the work function of fringe region, fringe region includes dim light area and the area of coverage, and the area of coverage surrounds dim light area；The barricade is located on pixel electrode layer, and barricade surrounds pixel electrode, and the area of coverage of barricade covering pixel electrode；The organic light-emitting units are located on pixel electrode.The present invention can solve the inhomogenous problem of light colourity that organic light-emitting units are sent under the conditions of technique is simple, improve the display effect of organic electroluminescence display panel.
Description
Technical field
The invention belongs to flexible display technologies field, and in particular to a kind of organic electroluminescence display panel, preparation method and aobvious
Showing device.
Background technology
With the continuous development of Display Technique, flexible display panels will by its frivolous, bent, impact-resistant characteristic
As the main flow of display field.Wherein organic light emitting display (Organic Light Emitting Display, OLED) is because of tool
Have the advantages that wide fast response time, visual angle, the high and low power consumption of brightness, selfluminous cell and bend resistance characteristic are good, in recent years, turn into
One of focus of field of flexible display research.
Organic light-emitting units on organic electroluminescence display panel are typically made of by the way of the inkjet printing, in drop
After drying, due to coffee toroidal effect so that the presentation central area thickness of organic light-emitting units is small, the big spy of fringe region thickness
Point.And the uneven thickness one of organic light-emitting units so that the diverse location of organic light-emitting units is because of the influence of microcavity effect so that
The characteristics of luminescence of the diverse location of organic light-emitting units is different, therefore, in the different zones of organic light-emitting units, the light sent
Colourity also heterogeneity, influence the display effects of organic light-emitting units.
Although the thicknesses of layers of the central area of organic light-emitting units is adjusted to target thickness, organic light emission can be ensured
The characteristics of luminescence of central area is identical, and the color of the light sent is also identical, but the thickness of organic light-emitting units neighboring area leads to
The thickness of its central area is often both greater than, and the thickness of organic light emission neighboring area is difficult to adjust, and therefore, still suffers from organic light emission
The inhomogenous problem of photochromism that unit is sent.
In the prior art, the fringe region of organic light-emitting units is blocked by setting shelter on barricade, to improve
The homogeneity of organic light-emitting units colourity.But this method has the following disadvantages：
1st, the size of shelter is difficult control, and it is smaller to block scope, is not enough to shelter from organic light-emitting units fringe region
The heterochromatic light sent；Block that scope is excessive, effective lighting area of organic light-emitting units can be reduced again, influence display effect；
2nd, the manufacture of shelter adds process, improves production cost.
Therefore, it is ability in view of the above-mentioned problems, providing a kind of organic electroluminescence display panel, preparation method and display device
Domain technical problem urgently to be resolved hurrily.
The content of the invention
To solve the problems, such as in above-mentioned background technology, the invention provides a kind of organic electroluminescence display panel, preparation method
And display device, under the conditions of technique is simple, solve the inhomogenous problem of light colourity that organic light-emitting units are sent, improve
The display effect of organic electroluminescence display panel.
In order to solve the above problems, the invention provides a kind of organic electroluminescence display panel, including：Substrate, pixel electrode
Layer, barricade and organic light-emitting units,
The pixel electrode layer is located on the substrate, and the pixel electrode layer includes：Multiple pixel electrodes；
The pixel electrode includes：Fringe region and the central area Jing Guo plasma treatment, the fringe region surround
The central area, the work function of the central area are more than the work function of the fringe region；
The fringe region includes：Dim light area and the area of coverage, the area of coverage surround the dim light area；
The barricade is located on the pixel electrode layer, and the barricade surrounds the pixel electrode, and the barricade covers
The area of coverage of the pixel electrode；
The organic light-emitting units are located on the pixel electrode.
In order to solve the above problems, present invention also offers a kind of preparation method of organic electroluminescence display panel, including：
Pixel electrode layer is made on substrate, and multiple pixel electrodes, the pixel electrode bag are formed by lithographic technique
Include：Central area and fringe region, the fringe region surround the central area；The fringe region, including：Dim light area and
The area of coverage, the area of coverage surround the dim light area；
Barricade is made on the pixel electrode layer, the barricade surrounds the pixel electrode, and barricade covering institute
State the area of coverage of pixel electrode；
Corona treatment is carried out to the central area of the pixel electrode,
The organic light-emitting units formed on the pixel electrode.
In order to solve the above problems, present invention also offers a kind of organic light-emitting display device, including above-mentioned organic hair
Light display panel.
Compared with prior art, flexible display panels of the invention and preparation method thereof realize following beneficial effect：
Organic electroluminescence display panel, preparation method and display device provided by the invention, by plasma to pixel electricity
The central area of pole is handled so that the work function of the central area of pixel electrode is more than the work(of the fringe region of pixel electrode
Function, and the light that organic light-emitting units corresponding to central area are sent is effective light, it is organic corresponding to the dim light area of fringe region
The light that luminescence unit is sent is heterochromatic light, and therefore, under identical operating voltage, effective light is enhanced, while heterochromatic light is subtracted
It is weak, so as to reduce the inhomogenous influence of colourity caused by heterochromatic light, improve the display effect of organic electroluminescence display panel；And
And the organic electroluminescence display panel that the present embodiment provides need not increase shelter, it is therefore not necessary to increase process, production cost
It is relatively low.
By referring to the drawings to the present invention exemplary embodiment detailed description, further feature of the invention and its
Advantage will be made apparent from.
Brief description of the drawings
It is combined in the description and the accompanying drawing of a part for constitution instruction shows embodiments of the invention, and even
It is used for the principle for explaining the present invention together with its explanation.
Fig. 1 is a kind of schematic cross-section of organic electroluminescence display panel of the prior art；
Fig. 2 is the schematic top plan view of the organic electroluminescence display panel in the present invention；
Fig. 3 is a kind of schematic cross-section of organic electroluminescence display panel in the present invention；
Fig. 4 is Fig. 3 partial enlarged drawing；
Fig. 5 is the schematic cross-section of another organic electroluminescence display panel in the present invention；
Fig. 6 is the schematic cross-section of the organic light-emitting units of the organic electroluminescence display panel in the present invention；
Fig. 7 is corresponding schematic diagram of the organic light-emitting units in the present invention with pixel electrode；
Fig. 8 is the schematic top plan view of the organic light-emitting units of organic electroluminescence display panel in the present invention；
Fig. 9 is a kind of flow chart of the preparation method of organic electroluminescence display panel in the present invention；
Figure 10 is the process schematic representation of the preparation method step S101 in the present invention；
Figure 11 is the process schematic representation of the preparation method step S102 in the present invention；
Figure 12 is that the preparation method step S103 in the present invention is a kind of process schematic representation；
Figure 13 is another process schematic representation of the preparation method step S103 in the present invention；
Figure 14 is the process schematic representation of the preparation method step S104 in the present invention；
Figure 15 is the process schematic representation that cushion is made in the present invention；
Figure 16 is the process schematic representation for making organic light-emitting units in the present invention on the buffer layer；
Figure 17 is the top view of organic light-emitting display device in the present invention.
Embodiment
The various exemplary embodiments of the present invention are described in detail now with reference to accompanying drawing.It should be noted that：Unless have in addition
Body illustrates that the unlimited system of part and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The scope of invention.
The description only actually at least one exemplary embodiment is illustrative to be never used as to the present invention below
And its application or any restrictions that use.
It may be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable
In the case of, the technology, method and apparatus should be considered as part for specification.
In shown here and discussion all examples, any occurrence should be construed as merely exemplary, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it need not be further discussed in subsequent accompanying drawing in individual accompanying drawing.
The present invention relates to a kind of organic electroluminescence display panel, preparation method and display device, for organic light emitting display face
For plate, the inhomogenous problem of colourity of organic light-emitting units be present, so as to have impact on the aobvious of whole organic electroluminescence display panel
Show effect.
Fig. 1 gives a kind of schematic cross-section of organic electroluminescence display panel of the prior art, refers to Fig. 1, existing
Organic electroluminescence display panel in technology includes substrate 1, the pixel electrode 20 on substrate 1, the gear for surrounding pixel electrode 20
Wall 3 and the organic light-emitting units 4 being arranged on pixel electrode 20.Because organic light-emitting units 4 are typically using inkjet printing
Made of mode, after droplet drying, because of coffee toroidal effect so that the thickness presentation central area of organic light-emitting units 4 is small, side
The characteristics of edge region is big.Because of the uneven thickness one of organic light-emitting units 4, its characteristics of luminescence is in diverse location by microcavity effect
Influence also different.As shown in figure 1, the difference in thickness of the central area of organic light-emitting units 2 is small, substantially not by microcavity effect
Influence, the light color sent is identical, is effective light (black arrow in Fig. 1), and the thickness of organic light-emitting units fringe region
It is larger, had a great influence by microcavity effect, the light sent is heterochromatic light (blank arrowhead in Fig. 1).Therefore, in the difference of pixel
Region, the colourity of the light sent also heterogeneity, influence the display effect of organic electroluminescence display panel.
For the color of organic light-emitting units caused by the uneven thickness one of the organic light-emitting units of organic electroluminescence display panel
Heterogeneity is spent, the problem of so as to influence the display effect of organic light emitting display face meal, the invention provides a kind of organic light emission to show
Show panel, preparation method and display device.
Detailed retouch is carried out below for organic electroluminescence display panel provided by the invention, preparation method and display device
State.
Fig. 2 gives the schematic top plan view of the organic electroluminescence display panel in the present invention, and Fig. 3 gives having in the present invention
The schematic top plan view of machine light emitting display panel, refers to Fig. 2 and Fig. 3, the organic electroluminescence display panel, including：Substrate 1, pixel
Electrode layer 2, barricade 3 and organic light-emitting units 4.Pixel electrode layer 2 is located on substrate 1, and pixel electrode layer 2 includes multiple pixels electricity
Pole 20.
Include continuing with referring to Fig. 3, pixel electrode 20：Fringe region 202 and the central area Jing Guo plasma treatment
201, fringe region 202 surrounds central area 201, and the work function of central area 201 is more than the work function of fringe region 202.
Fig. 4 is Fig. 3 partial enlarged drawing, refers to Fig. 2 to Fig. 4, and fringe region 202 includes：Dim light area a and area of coverage b,
Area of coverage b surrounds dim light area a；Barricade 3 is located on pixel electrode layer 2, and barricade 3 surrounds pixel electrode 20, and barricade 3 covers pixel
The area of coverage b of electrode 20；Organic light-emitting units 4 are located on pixel electrode 2.
The organic electroluminescence display panel that the present embodiment provides, because the work function of the central area of pixel electrode is more than pixel
The work function of the fringe region of electrode, and the light that organic light-emitting units corresponding to central area are sent is effective light, fringe region
Dim light area corresponding to the light that sends of organic light-emitting units be heterochromatic light, therefore, under identical operating voltage, effective light is increased
By force, while heterochromatic light is weakened, and so as to reduce the inhomogenous influence of colourity caused by heterochromatic light, improves organic light emitting display
The display effect of panel；Moreover, the organic electroluminescence display panel that the present embodiment provides need not increase shelter, it is therefore not necessary to
Increase process, production cost is relatively low.
Continuing with referring to Fig. 4, it is necessary to illustrate, the present embodiment improves pixel electrode by way of corona treatment
The work function of 20 central area 201.Due to after plasma treatment, the work function of central area 201 can not only be improved,
Also other performances of central area 201 can be changed, such as：The drop of organic light-emitting units 4 is made with using ink-jet printing process
The infiltration angle in heart district domain 201 just from fringe region (it is more specifically different with dim light area a) infiltration angle, have so as to aggravate making
The coffee toroidal effect of the drop of machine luminescence unit 4.Therefore, present embodiments providing another organic electroluminescence display panel, Fig. 5 gives
The schematic cross-section of another organic electroluminescence display panel gone out in the present invention, refers to Fig. 5, the organic light emitting display face
Plate, cushion 5, the cushion 5 covering pixel electrode 20 and barricade 3 are provided between organic light-emitting units 4 and pixel electrode 20.
By setting cushion 5 between pixel electrode 20 and organic light-emitting units 4, organic light-emitting units 4 only contact with cushion 5,
The problem of in the absence of the infiltration angle difference of organic light-emitting units 4 and the different zones of pixel electrode 20.In order to meet pixel electrode
Good electrical contact between 20 and organic light-emitting units 4, preferably, cushion 5 have hole transport ability.
Fig. 6 is the schematic cross-section of the organic light-emitting units of the organic electroluminescence display panel in the present invention, refers to Fig. 6,
Organic light-emitting units 4 include flat region 401 and the gradient thickness area 402 around flat region 401, gradient thickness area 402
Thickness be more than the thickness of flat region 401, and the thickness in gradient thickness area 402 increases with increasing with the distance of flat region 401
Greatly.It is natural caused by gradient thickness area 402 makes the coffee toroidal effect of the drop of organic light-emitting units 4 using ink-jet printing process
Although the thickness difference of the flat region 401 of formation is smaller, in order to improve display effect, flat region 401 is handled, carried
The homogeneity of the high thickness of flat region 401, makes the thickness of flat region 401 identical, so as to further improve organic electroluminescence display panel
Display effect.
Fig. 7 is the organic light-emitting units and the corresponding schematic diagram of pixel electrode in the present invention, Fig. 7 is referred to, in order to reduce
Influence of the microcavity effect to display effect is, it is necessary to ensure that the luminous efficiency of flat region 401 is high, and gradient thickness area 402 is luminous
Efficiency is low, and therefore, preferably, the orthographic projection of the central area 201 of pixel electrode 20 on substrate 1 is located at flat region
In 401 orthographic projection on substrate 1, now, the projection of the gradient thickness areas 402 of organic light-emitting units 4 on substrate 1 is located at picture
In the dim light area a of plain electrode 20, because the work function in dim light area is larger so that the luminous efficiency in gradient thickness area 402 is low, thickness
The light intensity for the heterochromatic light that transition region 402 is sent is very low or even is not noticeable by the human eye, so as to reduce heterochromatic light to organic light emitting display
The influence of panel, improve the display effect of organic electroluminescence display panel.Certainly, the edge of flat region 401 is on substrate 1
Projection may be located in the projections of dim light area a on substrate 1, this cause the luminous efficiency of the edge of flat region 401 compared with
Low, therefore, as most preferably scheme, the orthographic projection of the central area 201 of pixel electrode 20 on substrate 1 exists with flat region 401
Orthographic projection on substrate 1 overlaps, and now, the luminous efficiency of any position of the flat region 401 of organic light-emitting units 4 is all very high,
And the luminous efficiency in any position in gradient thickness area 402 is all very low, i.e.,：While ensureing that heterochromatic smooth luminous intensity is low,
The luminous intensity highest of effective light, the display effect of display panel are best.
Fig. 8 is the schematic top plan view of the organic light-emitting units of organic electroluminescence display panel in the present invention, refers to Fig. 8, weak
Light area a width d is more than or equal to 5 microns.It should be noted that dim light area a width d is dim light area a remote central area
The distance between 201 edge in margin and center region 201.By controlling dim light area a width d, pixel electricity can be ensured
The orthographic projection of the central area 201 of pole 20 on substrate 1 is located in the orthographic projection of flat region 401 on substrate 1 (such as Fig. 7 institutes
Show), so as to reduce influence of the heterochromatic light to organic electroluminescence display panel, improve the display effect of organic electroluminescence display panel.
In order to solve the above problems, the present embodiment additionally provides a kind of preparation method of organic electroluminescence display panel, and Fig. 9 gives
A kind of flow chart of the preparation method of the organic electroluminescence display panel gone out in the present invention, refers to Fig. 9, and this method includes：
Step S101：Figure 10 gives the process schematic representation of the preparation method step S101 in the present invention, refers to Figure 10,
Pixel electrode layer 2 is made on substrate 1, and multiple pixel electrodes 20 are formed by lithographic technique, and pixel electrode 20 includes：Center
Region 201 and fringe region 202, fringe region 202 surround central area 201；Fringe region 202, including：Dim light area a and cover
Cover region b, area of coverage b surround dim light area a.
Step S102：Figure 11 gives the process schematic representation of the preparation method step S102 in the present invention, refers to Figure 11,
Barricade 3 is made on pixel electrode layer 2, barricade 3 surrounds pixel electrode 20, and barricade 3 covers the area of coverage b of pixel electrode 2.
Step S103：Corona treatment is carried out to the central area of pixel electrode.
The preparation method step S103 that Figure 12 is given in the present invention is a kind of process schematic representation, Figure 12 is referred to, right
The central area 201 of pixel electrode 20 blocked in corona treatment using mask plate 6 fringe region of pixel electrode 20
202, and the central area 201 of the pixel electrode 20 to exposing carries out corona treatment.Can be accurate by using mask plate 6
The true central area for exposing pixel electrode 20, the control accuracy requirement of plasma (arrow in Figure 12) is relatively low, but
The degree of accuracy of plasma treatment is high.
Figure 13 gives another process schematic representation of the preparation method step S103 in the present invention, refers to Figure 13,
In corona treatment, using in plasma beam (in Figure 13 with 2 for one group of arrow group) scanning element electrode 20
Heart district domain 201.The central area 201 of pixel electrode 20 is handled by using beam-plasma, mask plate can be reduced
Use, advantageously reduce production cost.
Step S104：Figure 14 gives the process schematic representation of the preparation method step S104 in the present invention, refers to Figure 14
Organic light-emitting units 4 are formed on pixel electrode 20.
The preparation method for the organic electroluminescence display panel that the present embodiment provides, the center by plasma to pixel electrode
Region is handled so that and the work function of the central area of pixel electrode is more than the work function of the fringe region of pixel electrode, and
The light that organic light-emitting units corresponding to central area are sent is effective light, organic light-emitting units corresponding to the dim light area of fringe region
The light sent is heterochromatic light, and therefore, under identical operating voltage, effective light is enhanced, while heterochromatic light is weakened, so as to subtract
The small inhomogenous influence of colourity caused by heterochromatic light, improve the display effect of organic electroluminescence display panel；Moreover, this implementation
The organic electroluminescence display panel that example provides need not increase shelter, it is therefore not necessary to increase process, production cost is relatively low.
Due to after plasma treatment, the work function of central area 201 can not only be improved, it can also change central area
201 other performances, such as：Drop and the infiltration angle of central area 201 of organic light-emitting units 4 are made using ink-jet printing process
Just from fringe region (it is more specifically different with dim light area a) infiltration angle, so as to aggravate make organic light-emitting units 4 drop
Coffee toroidal effect.Figure 15 is the process schematic representation that cushion is made in the present invention, Figure 15 is referred to, alternatively, in step 104
Before (formation organic light-emitting units), in addition to：Cushion 5 is made, cushion 5 covers pixel electrode 20 and barricade 3；Figure 16 is
The process schematic representation of organic light-emitting units is made in the present invention on the buffer layer, refers to 16, then the pixel electrode on cushion 5
20 correspondence position sets organic light-emitting units 4, by setting cushion 5 between pixel electrode 20 and organic light-emitting units 4,
Organic light-emitting units 4 only contact with cushion 5, in the absence of the infiltration of organic light-emitting units 4 and the different zones of pixel electrode 20
The problem of angle difference.In order to meet electrical contact good between pixel electrode 20 and organic light-emitting units 4, preferably,
Cushion 5 has hole transport ability.
Fig. 6 is referred to, organic light-emitting units 4 include flat region 401 and the gradient thickness area around flat region 401
402, the thickness in gradient thickness area 402 is more than the thickness of flat region 401, and the thickness in gradient thickness area 402 with flat region
401 distance increases and increased.Gradient thickness area 402 makes the coffee of the drop of organic light-emitting units 4 using ink-jet printing process
Caused by toroidal effect, although the thickness difference of the flat region 401 of self-assembling formation is smaller, in order to improve display effect, to flat
Smooth area 401 is handled, and improves the homogeneity of the thickness of flat region 401.
Fig. 7 is referred to, in order to improve the microcavity effect caused by the uneven thickness of organic light-emitting units 4, it is necessary to ensure
The luminous efficiency of flat region 401 is high, and the luminous efficiency in gradient thickness area 402 is low, therefore, preferably, pixel electrode
The orthographic projection of 20 central area 201 on substrate 1 is located in the orthographic projection of flat region 401 on substrate 1, now, You Jifa
The projection of the gradient thickness area 402 of light unit 4 on substrate 1 is in the dim light area a of pixel electrode 20, gradient thickness area 402
Luminous efficiency it is low, the light intensity for the heterochromatic light that gradient thickness area 402 is sent is very low or even is not noticeable by the human eye, heterochromatic so as to reduce
Influence of the light to organic electroluminescence display panel, improve the display effect of organic electroluminescence display panel.Certainly, the side of flat region 401
The projection of edge position on substrate 1 may be located in the projections of dim light area a on substrate 1, and this causes the edge of flat region 401
The luminous efficiency at position is relatively low, therefore, as most preferably scheme, the positive throwing of the central area 201 of pixel electrode 20 on substrate 1
Orthographic projection of the shadow with flat region 401 on substrate 1 overlaps, now, any position of the flat region 401 of organic light-emitting units 4
Luminous efficiency is all very high, and the luminous efficiency in any position in gradient thickness area 402 is all very low, i.e.,：Ensureing heterochromatic light hair
While luminous intensity is low, the luminous intensity highest of effective light, the display effect of display panel is best.
The width d for referring to Fig. 8 dim lights area a is more than or equal to 5 microns.By the width d, Neng Goubao that control dim light area a
The orthographic projection of the central area 201 of pixel electrode 20 on substrate 1 is demonstrate,proved to be located in the orthographic projection of flat region 401 on substrate 1 (such as
Shown in Fig. 7), so as to reduce influence of the heterochromatic light to organic electroluminescence display panel, improve the display effect of organic electroluminescence display panel
Fruit.
In order to solve the above problems, the present embodiment additionally provides a kind of organic light-emitting display device, and Figure 17 gives this hair
A kind of schematic top plan view of organic light-emitting display device in bright, refers to Figure 17, and the display device includes any of the above-described organic
Light emitting display panel, the central area of pixel electrode is handled by plasma so that the central area of pixel electrode
Work function be more than pixel electrode fringe region work function, and the light that organic light-emitting units corresponding to central area are sent is
Effective light, the light that organic light-emitting units corresponding to the dim light area of fringe region are sent are heterochromatic light, therefore, are worked in identical electric
Pressure, effective light is enhanced, while heterochromatic light is weakened, and so as to reduce the inhomogenous influence of colourity caused by heterochromatic light, is carried
The high display effect of organic light-emitting display device.
Compared with prior art, organic electroluminescence display panel of the invention, preparation method and display device, realize as follows
Beneficial effect：
Organic electroluminescence display panel, preparation method and display device provided by the invention, by plasma to pixel electricity
The central area of pole is handled so that the work function of the central area of pixel electrode is more than the work(of the fringe region of pixel electrode
Function, and the light that organic light-emitting units corresponding to central area are sent is effective light, it is organic corresponding to the dim light area of fringe region
The light that luminescence unit is sent is heterochromatic light, and therefore, under identical operating voltage, effective light is enhanced, while heterochromatic light is subtracted
It is weak, so as to reduce the inhomogenous influence of colourity caused by heterochromatic light, improve the display effect of organic electroluminescence display panel；And
And organic electroluminescence display panel provided by the invention need not increase shelter, it is therefore not necessary to increase process, production cost compared with
It is low.
Although some specific embodiments of the present invention are described in detail by example, the skill of this area
Art personnel it should be understood that example above merely to illustrating, the scope being not intended to be limiting of the invention.The skill of this area
Art personnel to above example it should be understood that can modify without departing from the scope and spirit of the present invention.This hair
Bright scope is defined by the following claims.
Claims (13)
- A kind of 1. organic electroluminescence display panel, it is characterised in that including：Substrate, pixel electrode layer, barricade and organic light emission list Member,The pixel electrode layer is located on the substrate, and the pixel electrode layer includes：Multiple pixel electrodes；The pixel electrode includes：Fringe region and the central area Jing Guo plasma treatment, described in the fringe region surrounds Central area, the work function of the central area are more than the work function of the fringe region；The fringe region includes：Dim light area and the area of coverage, the area of coverage surround the dim light area；The barricade is located on the pixel electrode layer, and the barricade surrounds the pixel electrode, and described in barricade covering The area of coverage of pixel electrode；The organic light-emitting units are located on the pixel electrode.
- 2. organic electroluminescence display panel according to claim 1, it is characterised in thatBe provided with cushion between the organic light-emitting units and the pixel electrode, the cushion cover the pixel electrode and The barricade.
- 3. organic electroluminescence display panel according to claim 1 or 2, it is characterised in that the width in the dim light area is more than Or equal to 5 microns.
- 4. organic electroluminescence display panel according to claim 1, it is characterised in that the organic light-emitting units include flat Area and the gradient thickness area around the flat region, the thickness in the gradient thickness area are more than the thickness of the flat region Degree, and, the thickness in the gradient thickness area increases with increasing with the distance of the flat region.
- 5. organic electroluminescence display panel according to claim 4, it is characterised in that the central area of the pixel electrode exists Orthographic projection on the substrate is located in the orthographic projection of the flat region on the substrate.
- A kind of 6. preparation method of organic electroluminescence display panel, it is characterised in that including：Pixel electrode layer is made on substrate, and multiple pixel electrodes are formed by lithographic technique, the pixel electrode includes：In Heart district domain and fringe region, the fringe region surround the central area；The fringe region, including：Dim light area and covering Area, the area of coverage surround the dim light area；Barricade is made on the pixel electrode layer, the barricade surrounds the pixel electrode, and the barricade covers the picture The area of coverage of plain electrode；Corona treatment is carried out to the central area of the pixel electrode,The organic light-emitting units formed on the pixel electrode.
- 7. the preparation method of organic electroluminescence display panel according to claim 6, it is characterised in that described organic being formed Before luminescence unit, in addition to：Cushion is made, the cushion covers the pixel electrode and the barricade.
- 8. the preparation method of organic electroluminescence display panel according to claim 6, it is characterised in that to pixel electricity The central area of pole used in the corona treatment marginal zone of pixel electrode described in mask plate shielding Domain, and the central area of the pixel electrode to exposing carries out corona treatment.
- 9. the preparation method of organic electroluminescence display panel according to claim 6, it is characterised in that in the plasma In processing, the central area of pixel electrode described in plasma beam scanning is used.
- 10. the preparation method of the organic electroluminescence display panel according to claim 6 or 7, it is characterised in that the pixel electricity The width in the dim light area of pole is more than or equal to 5 microns.
- 11. the preparation method of organic electroluminescence display panel according to claim 6, it is characterised in that using inkjet printing Method makes the organic light-emitting units,The organic light-emitting units include flat region and surround the gradient thickness area of the flat region, the thickness in the gradient thickness area Degree is more than the thickness of the flat region, and, the thickness in the gradient thickness area increases with increasing with the distance of the flat region Greatly.
- 12. the preparation method of organic electroluminescence display panel according to claim 11, it is characterised in that the pixel electrode Central area orthographic projection on the substrate be located in the orthographic projection of the flat region on the substrate.
- 13. a kind of organic light-emitting display device, it is characterised in that show including any described organic light emission in claim 1-5 Show panel.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN108281471A (en) * | 2018-01-30 | 2018-07-13 | 上海天马微电子有限公司 | Organic light emitting display panel and preparation method thereof, display device |
| CN108281471B (en) * | 2018-01-30 | 2021-10-01 | 上海天马微电子有限公司 | Organic light-emitting display panel, manufacturing method thereof and display device |
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| WO2019192421A1 (en) * | 2018-04-03 | 2019-10-10 | 京东方科技集团股份有限公司 | Oled substrate and manufacturing method thereof, and display device |
| US10957879B2 (en) | 2018-04-03 | 2021-03-23 | Boe Technology Group Co., Ltd. | OLED substrate, manufacturing method thereof, display device |
| CN108565352A (en) * | 2018-04-19 | 2018-09-21 | 京东方科技集团股份有限公司 | Organic LED display panel and its manufacturing method, display device |
| WO2019201096A1 (en) * | 2018-04-19 | 2019-10-24 | 京东方科技集团股份有限公司 | Organic light-emitting diode display panel and manufacturing method therefor, and display apparatus |
| US11075353B2 (en) | 2018-04-19 | 2021-07-27 | Boe Technology Group Co., Ltd. | Organic light-emitting diode display panel and manufacturing method thereof and display device |
| CN109273500A (en) * | 2018-09-21 | 2019-01-25 | 京东方科技集团股份有限公司 | A kind of oled display substrate, display device and production method |
| CN110164931A (en) * | 2019-05-23 | 2019-08-23 | 京东方科技集团股份有限公司 | Organic electroluminescence device, its manufacturing method and display device |
| WO2020233596A1 (en) * | 2019-05-23 | 2020-11-26 | 京东方科技集团股份有限公司 | Organic electroluminescent device, method for manufacture thereof, and display apparatus |
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