CN109830507A - Oled display substrate and preparation method, display panel and display device - Google Patents
Oled display substrate and preparation method, display panel and display device Download PDFInfo
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- CN109830507A CN109830507A CN201910020558.9A CN201910020558A CN109830507A CN 109830507 A CN109830507 A CN 109830507A CN 201910020558 A CN201910020558 A CN 201910020558A CN 109830507 A CN109830507 A CN 109830507A
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Abstract
The embodiment of the invention discloses a kind of Organic Light Emitting Diode oled display substrate and preparation methods, display panel and display device, pixel confining layer including substrate and setting on the substrate, there is the opening for the light emitting region for limiting organic illuminating element in the pixel confining layer, the pixel confining layer has at least two thickness, the height of opening where two adjacent and the organic illuminating element that color is different is different, it is able to ascend PPI, avoids colour mixture risk.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of Organic Light Emitting Diode oled display substrate and preparation sides
Method, display panel and display device.
Background technique
Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) display is frivolous with its, actively
Shine, quick response, wide viewing angle, rich in color, high brightness, many merits such as low-power consumption and high-low temperature resistant and be known as by industry
It is the third generation display technology after liquid crystal display (Liquid Crystal Display, LCD), can be widely applied to intelligence
The end products such as energy mobile phone, tablet computer, TV.
The number of pixels (Pixel Per Inch, PPI) that per inch is possessed is higher and higher, it has also become display technology development
Direction, PPI is higher, and picture detail is abundanter.There are many kinds for the colorization method of OLED screen body, now more mature and
The OLED colorization technology of success volume production is mainly OLED evaporation coating technique.
The technology of the existing maturation of OLED is using fine metal mask version (Fine Metal Mask, FMM) by RGB
Luminous organic material is deposited to prepare colour element pattern in pixel ordered arrangement.In the prior art, there are FMM production difficulty or steamings
The problem of plating colour mixture, is difficult further to promote PPI.
Summary of the invention
The embodiment of the invention provides a kind of oled display substrate and preparation method, display panel and display device, designs
Surplus becomes bevel edge from straight flange, is able to ascend PPI, avoids colour mixture risk.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that
In a first aspect, the embodiment of the invention provides a kind of oled display substrates, comprising: substrate and setting are in the substrate
On pixel confining layer, there is in the pixel confining layer opening for the light emitting region for limiting organic illuminating element, the pixel
Confining layers have at least two thickness, and the height of the opening where two adjacent and the organic illuminating element that color is different is not
Together.
Oled display substrate according to the present invention, the described two adjacent and different color organic illuminating element
Pixel confining layer between the opening at place has at least two thickness.
Oled display substrate according to the present invention, the described two adjacent and different color organic illuminating element
Pixel confining layer between the opening at place forms the default gradient.
Oled display substrate according to the present invention, the arrangement mode of the opening include array arrangement；
In the opening described in a line, the height of the opening where two adjacent and the organic illuminating element that color is different
It is different；And/or
In a column opening, the height of the opening where two adjacent and the organic illuminating element that color is different
It is different.
Oled display substrate according to the present invention, the display base plate further include:
First electrode layer on the substrate is set, and the opening exposes the first electrode layer；
Organic illuminating element is located in the opening；
The second electrode lay is located on the organic illuminating element.
Oled display substrate according to the present invention, the substrate include: underlay substrate and are arranged in the substrate base
Transistor array layer on plate.
Second aspect, the embodiment of the invention provides a kind of oled display substrate preparation method, the preparation method includes,
One substrate is provided, forms insulating material film on the substrate；
Patterned process is carried out to the insulating material film, forms pixel confining layer；Wherein, in the pixel confining layer
It is formed with the opening of the light emitting region for limiting organic illuminating element, the pixel confining layer has at least two thickness, and two
The height of opening where a adjacent and different color organic illuminating element is different.
Oled display substrate preparation method according to the present invention, the preparation method further include:
Patterned process is being carried out to the insulating material film, is being formed before pixel confining layer, on the substrate shape
At first electrode layer；
Patterned process is being carried out to the insulating material film, is being formed after pixel confining layer, in the opening shape
At organic illuminating element.
The third aspect, the embodiment of the invention provides a kind of display panels, including oled display substrate described above.
Fourth aspect, the embodiment of the invention provides a kind of display devices, including display panel described above.
Oled display substrate provided in an embodiment of the present invention and preparation method, display panel and display device, by making picture
Plain confining layers have at least two thickness, the height of the opening where two adjacent and the organic illuminating element that color is different
Difference can promote PPI so that design margin is increased to oblique line distance by traditional linear distance to a certain extent；In addition,
It is generally aligned in the same plane relative to traditional all sub-pixels, two organic illuminating element institutes adjacent and that color is different in this programme
Open height it is different so that different colours sub-pixel upper surface be in different planes, can be avoided colour mixture, and then promotion
Show the display effect of picture.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will make below to required in the embodiment of the present invention
Attached drawing is briefly described, for those of ordinary skill in the art, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 shows a kind of partial cutaway schematic of oled display substrate provided in an embodiment of the present invention；
Fig. 2 shows the partial cutaway schematics of another oled display substrate provided in an embodiment of the present invention；
Fig. 3 shows the partial cutaway schematic of another oled display substrate provided in an embodiment of the present invention；
Fig. 4 shows a kind of partial cutaway schematic of traditional oled display substrate.
Description of symbols:
10- substrate；20- pixel confining layer；21- first thickness；22- second thickness；23- third thickness；30- opening；31-
First opening；32- second is open；33- third opening；40- organic illuminating element.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below, in order to make mesh of the invention
, technical solution and advantage be more clearly understood, with reference to the accompanying drawings and embodiments, the present invention is further retouched in detail
It states.It should be understood that specific embodiment described herein is only configured to explain the present invention, it is not configured as limiting the present invention.
To those skilled in the art, the present invention can be real in the case where not needing some details in these details
It applies.Below the description of embodiment is used for the purpose of better understanding the present invention to provide by showing example of the invention.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence " including ... ", it is not excluded that including
There is also other identical elements in the process, method, article or equipment of the element.
The embodiment of the invention provides a kind of oled display substrate and preparation methods, display panel and display device, use
Scheme in the embodiment of the present invention, so that design margin is increased to oblique line distance by traditional linear distance, and then can be one
Determine to promote PPI in degree；In addition, being generally aligned in the same plane relative to traditional all sub-pixel upper surfaces, two phases in this programme
Open height where adjacent and different color organic illuminating element is different, so that different colours sub-pixel upper surface is in difference
Plane, can be avoided colour mixture risk；Meanwhile design margin becomes bevel edge from straight flange, further reduced difficulty of throwing the net, in turn
Promote the display effect of display picture.
Fig. 1 to Fig. 3 shows a kind of partial cutaway schematic of oled display substrate provided in an embodiment of the present invention.Such as figure
1 to shown in Fig. 3, oled display substrate provided in an embodiment of the present invention, comprising: the pixel limit of substrate 10 and setting on the substrate 10
Given layer 20 has the opening 30 for limiting the light emitting region of organic illuminating element, pixel confining layer 20 in pixel confining layer 20
The height of opening 30 at least two thickness, and where two adjacent and organic illuminating element that color is different is different.This
In, pixel confining layer 20 can have two kinds of thickness, three kinds of thickness or more thickness, can limit pixel according to actual needs
The specific thickness of confining layers 20, is not limited thereto.
In one embodiment of the invention, as shown in Figure 1, the tool of pixel confining layer 20 is there are two types of thickness, pixel is limited
There is multiple openings 30 for limiting the light emitting region of organic illuminating element, including the first opening 31 and the second opening on layer 20
32, the first opening 31 has the first height, and the second opening 32 has the second height, and pixel confining layer 20 has 21 He of first thickness
Second thickness 22, first thickness 21 are different from second thickness 22；Wherein, 21 phase of first thickness of the first height and pixel confining layer
Together, the second height is identical as the second thickness 22 of pixel confining layer, two organic illuminating element places adjacent and that color is different
Opening 30 height it is different, that is, two one side positions of the organic illuminating element 40 far from substrate 10 adjacent and that color is different
In in Different Plane.
For example, the pixel confining layer 20 with first thickness 21 will be had far from the one side of substrate 10 as the first plane
There is the pixel confining layer 20 of second thickness 22 far from the one side of substrate 10 as the second plane, the first plane and the second plane be not total
Face, that is, the first organic illuminating element in the first opening 31 and the second organic illuminating element in the second opening 32
One side far from substrate 10 is in Different Plane.First organic illuminating element and the second organic illuminating element are having for different colours
Machine light-emitting component." plane " referred herein is the plane for substrate, with substrate-parallel.
From the point of view of comparison, as shown in figure 4, traditional OLED pixel confining layers have a kind of thickness, i.e. pixel confining layer is separate
The one side of substrate is in the same plane, that is, in the same plane, design margin is phase to one side of the organic illuminating element far from substrate
Linear distance between adjacent sub-pixel.And there are two types of the pixel confining layers of thickness to be located at organic illuminating element for tool of the invention
Different Plane, design margin are the oblique line distance under square one, increase design margin.
Therefore, the pixel confining layer of thickness is located at two organic illuminating elements adjacent and that color is different not there are two types of having
Coplanar, design margin becomes bevel edge from straight flange, in identical display area, can place more organic illuminating elements,
And then PPI is promoted, promote the display effect of display picture.In addition, can increase to a certain extent in the case where identical PPI
Big opening interval can reduce difficulty of throwing the net.
In another embodiment of the invention, as shown in Fig. 2, there are three types of thickness, pixel limits for the tool of pixel confining layer 20
There are multiple openings 30 for limiting the light emitting region of organic illuminating element, including the first opening 31, second is opened in given layer 20
Mouthfuls 32 and third opening 33, the first opening 31 there is the first height, the second opening 32 has the second height, and third opening 33 has
Third height, pixel confining layer 20 have first thickness 21, second thickness 22 and third thickness 23, and first thickness 21, second is thick
Degree 22 and third thickness 23 are different；First height is identical as the first thickness 21 of pixel confining layer, the second height and pixel
The second thickness 22 of confining layers is identical, and third height is identical as the third thickness 23 of pixel confining layer, and two adjacent apertures 30
Height it is different, that is, two organic illuminating elements 40 adjacent and that color is different are located at different flat far from the one sides of substrate 10
On face.
For example, the pixel confining layer 20 with first thickness 21 will be had far from the one side of substrate 10 as the first plane
There is the pixel confining layer 20 of second thickness 22 far from the one side of substrate 10 as the second plane, by the pixel with third thickness 23
For one side of the confining layers 20 far from substrate 10 as third plane, the first plane, the second plane and third plane are Different Plane,
That is, being located at the first organic illuminating element in the first opening 31, the second organic illuminating element in the second opening 32 and position
In one side of the third organic illuminating element far from substrate 10 in third opening 33 in Different Plane.First organic light emission member
Part, the second organic illuminating element and third organic illuminating element are the organic illuminating element of different colours.Referred herein is " flat
Face " is the plane for substrate, with substrate-parallel.
From the point of view of oled display substrate comparison as shown in Figure 4, in Fig. 4, pixel confining layer has a kind of thickness, i.e. pixel
One side of the confining layers far from substrate is in the same plane, that is, one side of the organic illuminating element far from substrate in the same plane, if
Meter surplus is straight flange.And the pixel confining layer of thickness makes two organic illuminating element positions adjacent and that color is different there are three types of having
In Different Plane, design margin is bevel edge, increases design margin.
Therefore, the pixel confining layer of thickness is located at two organic illuminating elements adjacent and that color is different not there are three types of having
Coplanar, design margin becomes bevel edge from straight flange, in identical display area, can place more organic illuminating elements,
And then PPI is promoted, promote the display effect of picture.In addition, can increase out to a certain extent in the case where identical PPI
Mouth interval, can reduce difficulty of throwing the net.
It should be noted that the pixel confining layer with multi-thickness can be set according to aforesaid way.Such as Fig. 1 to Fig. 3
Shown, the pixel confining layer 20 between opening 30 where two adjacent and organic illuminating element that color is different has at least two
Kind thickness, here, the pixel confining layer 20 between opening 30 can have four kinds of thickness, five kinds of thickness or more thickness, can
To limit the specific thickness of pixel confining layer 20 according to actual needs, it is not limited thereto.
As an example, as shown in Figure 1 or 2, since the pixel confining layer 20 between opening 30 has there are two types of thickness,
Including first thickness 21 and second thickness 22, first thickness 21 is different from second thickness 22；First opening 31 has the first height,
Second opening 32 has the second height, and the first height is identical as the first thickness 21 of pixel confining layer 20, the second height and pixel
The second thickness 22 of confining layers 20 is identical, and therefore, one side of the pixel confining layer 20 far from substrate 10 is non-coplanar, and has the first thickness
One side of one side and pixel confining layer 20 with second thickness 22 of the pixel confining layer 20 far from substrate 10 of degree 21, structure
At stepped right angle.
It should be noted that when be open 30 between pixel confining layer 20 have multi-thickness when, can with stepped-style and
Change, that is, two faces of the pixel confining layer 20 of different-thickness constitute stepped right angle, and the thickness of pixel confining layer 20 is with rank
The mode of ladder type increasing or decreasing changes.
In another embodiment of the invention, as shown in figure 3, the pixel confining layer 20 between opening 30 is with a variety of
Thickness, pixel confining layer 20 form the default gradient far from the one side of substrate 10, and the first opening 31 has the first height, the second opening
32 have the second height, and the first height is different from the second height, the first height and the pixel confining layer 20 close to the first opening 31
Thickness it is identical, the second height is identical as the thickness of pixel confining layer 20 close to the second opening 32, the first height and second high
The thickness of pixel confining layer 20 between degree is changed in a manner of linear increment or linear decrease, that is, the pixel limit between opening
Given layer forms the default gradient.
Further, the thickness of the pixel confining layer 20 between opening 30 is changed in a manner of linear increment or linear decrease,
One side of the pixel confining layer 20 far from substrate 10 and substrate 10 are at an acute angle, and the angular range of acute angle can be 30-60 degree, such as 33
Degree, 45 degree or 52 degree etc..In practical applications, specific angle can be set according to actual needs, be not limited thereto.
In addition, the thickness of the pixel confining layer 20 between opening 30 can also be changed with irregular mode, e.g., pixel is limited
20 one side far from substrate 10 of layer are in rough surface, that is, the variation of the thickness of the pixel confining layer 20 between opening 30
There is no specific rule, it is not limited here.
In addition, the arrangement mode of opening 30 includes array arrangement, in a line opening 30, two adjacent and color is different
The height of opening 30 where organic illuminating element is different；And/or in a column opening 30, two adjacent and color is different
The height of opening 30 where organic illuminating element is different.
In embodiments of the present invention, pass through the thickness for being designed as pixel confining layer 20 to have different, two adjacent and face
The height of opening 30 where the different organic illuminating element of color is different, that is, two organic light emission members adjacent and that color is different
Part 40 is located in Different Plane far from the one side of substrate 10, and design margin becomes bevel edge from straight flange, in identical display area,
More organic illuminating elements can be placed, PPI is able to ascend, avoid colour mixture risk；In addition, in the case where identical PPI, it can
To increase open space to a certain extent, difficulty of throwing the net can be reduced.
In an embodiment of the present invention, above-mentioned oled display substrate further include: first electrode layer on the substrate 10 is set
(not shown), opening 21 expose the first electrode layer.As an example, when above-mentioned first electrode layer is specially OLED
When anode layer in device, realized electrically by the drain electrode of via hole and transistor on the insulating layer of covering transistor array layer
Connection, specific structure can continue to use the prior art, and the embodiment of the present invention is not construed as limiting this.
Further, above-mentioned oled display substrate further includes organic illuminating element 40 and the second electrode lay (not shown),
Wherein organic illuminating element 40 is located in opening 30, and the second electrode lay is located on organic illuminating element 40.
For above-mentioned each structure it should be noted that it includes underlay substrate and setting in substrate that above-mentioned substrate 10, which refers to,
Transistor array layer on substrate, for controlling each OLED device.Wherein underlay substrate is specifically as follows such as glass rigidity
Substrate or the flexible substrates such as such as polyimides (polyimide, PI).
The embodiment of the invention also provides a kind of preparation methods of oled display substrate, including,
S100 provides a substrate 10, forms insulating material film on substrate；
S200 carries out patterned process to insulating material film, forms pixel confining layer 20；Wherein, pixel confining layer 20
On be formed with the opening 30 of light emitting region for limiting organic illuminating element, pixel confining layer has at least two thickness, two
The height of opening where a adjacent and different color organic illuminating element is different.
Here, typical patterned process is using mask plate, by exposing, developing to photoresist, etched membrane layer, removal
The technique of photoresist.Wherein, mask plate can be common mask plate or intermediate tone mask version or gray tone mask plate, should basis
Specific patterning is adjusted flexibly.It, can be by exposing, developing when above-mentioned pixel confining layer 20 is made of Other substrate materials
Particular design needed for being formed.
It should be noted that pixel confining layer 20 has at least two thickness, for example, the pixel of entire display base plate limits
Tool can be prepared there are two types of thickness layer 20 in two times with common mask plate altogether, for the first time, have the with the preparation of common mask plate
The pixel confining layer of one thickness second, is prepared on the basis of the pixel confining layer with first thickness with common mask plate
Pixel confining layer with second thickness, second thickness are thicker than first thickness；Intermediate tone mask (Half Tone can also be used
Mask, HTM) technique once prepared.In another example the pixel confining layer of entire display base plate has N kind thickness altogether, it can be with general
Prepared by logical mask plate point n times, can also once be prepared with HTM technique, wherein N is positive integer.
Before S200, above-mentioned preparation method further includes being formed correspond to the first of each opening 30 on the substrate 10
Electrode layer, the opening 30 being subsequently formed can expose first electrode layer.
After S200, above-mentioned preparation method further includes that organic illuminating element 40 is formed in opening 30.
The embodiment of the invention also provides a kind of display panels, include above-mentioned oled display substrate, can specifically continue to use existing
There is technology, the embodiment of the present invention is not construed as limiting this.
The embodiment of the invention also provides a kind of display devices, including above-mentioned display panel.Above-mentioned display device is specific
Can be OLED display, OLED TV, Digital Frame, mobile phone, tablet computer, Digital Frame, navigator etc. has any show
Show the product or component of function.
It should be clear that all the embodiments in this specification are described in a progressive manner, each embodiment it
Between the same or similar part may refer to each other, the highlights of each of the examples are it is different from other embodiments it
Place.The embodiment of the present invention is not limited to particular step and structure described above and shown in figure.The technology of this field
Personnel can be variously modified after the spirit for understanding the embodiment of the present invention, modification and addition, or between changing the step
Sequence.Also, the detailed description to known method technology for brevity, is omitted here.
The embodiment of the present invention can be realized in other specific forms, without departing from its spirit and essential characteristics.For example, special
Determining algorithm described in embodiment can be modified, and system architecture is without departing from the substantially smart of the embodiment of the present invention
Mind.Therefore, current embodiment is all counted as being exemplary rather than limited, the model of the embodiment of the present invention in all respects
It encloses by appended claims rather than foregoing description defines, also, falls into the meaning of claim and complete in the range of equivalent
Portion changes all to be included among the range of the embodiment of the present invention.
Claims (10)
1. a kind of Organic Light Emitting Diode oled display substrate characterized by comprising substrate and setting are on the substrate
Pixel confining layer has the opening for limiting the light emitting region of organic illuminating element, the pixel in the pixel confining layer
Confining layers have at least two thickness, and the height of the opening where two adjacent and the organic illuminating element that color is different is not
Together.
2. oled display substrate according to claim 1, which is characterized in that described two adjacent and different color is described
The pixel confining layer between opening where organic illuminating element has at least two thickness.
3. oled display substrate according to claim 1, which is characterized in that described two adjacent and different color is described
The pixel confining layer between opening where organic illuminating element forms the default gradient.
4. oled display substrate according to claim 1, which is characterized in that the arrangement mode of the opening includes array row
Cloth；
In the opening described in a line, the height of the opening where two adjacent and the organic illuminating element that color is different is not
Together；And/or
In a column opening, the height of the opening where two adjacent and the organic illuminating element that color is different is not
Together.
5. oled display substrate described in any one of -4 according to claim 1, which is characterized in that the display base plate also wraps
It includes:
First electrode layer on the substrate is set, and the opening exposes the first electrode layer；
Organic illuminating element is located in the opening；
The second electrode lay is located on the organic illuminating element.
6. oled display substrate described in any one of -4 according to claim 1, which is characterized in that the substrate includes: substrate
Substrate and the transistor array layer being arranged on the underlay substrate.
7. a kind of preparation method of oled display substrate, which is characterized in that method includes the following steps:
One substrate is provided, forms insulating material film on the substrate；
Patterned process is carried out to the insulating material film, forms pixel confining layer；Wherein, it is formed in the pixel confining layer
There is the opening of the light emitting region for defining machine light-emitting component, the pixel confining layer has at least two thickness, two phases
The height of the opening where the adjacent and different color organic illuminating element is different.
8. preparation method according to claim 7, which is characterized in that the preparation method further include:
Patterned process is being carried out to the insulating material film, is being formed before pixel confining layer, forms the on the substrate
One electrode layer；
Patterned process is being carried out to the insulating material film, is being formed after pixel confining layer, is formed in the opening
Machine light-emitting component.
9. a kind of display panel, which is characterized in that the display panel includes that OLED described in any one of claims 1-6 is shown
Substrate.
10. a kind of display device, which is characterized in that the display device includes display panel as claimed in claim 9.
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190531 |
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| RJ01 | Rejection of invention patent application after publication |