CN105914226A - OLED display substrate and manufacturing method thereof, display device and mask plate - Google Patents
OLED display substrate and manufacturing method thereof, display device and mask plate Download PDFInfo
- Publication number
- CN105914226A CN105914226A CN201610371410.6A CN201610371410A CN105914226A CN 105914226 A CN105914226 A CN 105914226A CN 201610371410 A CN201610371410 A CN 201610371410A CN 105914226 A CN105914226 A CN 105914226A
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- electrode
- oled display
- thickened section
- display substrate
- substrate
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention relates to the technical field of display, and discloses an OLED display substrate and a manufacturing method thereof, a display device and a mask plate. The OLED display substrate comprises a base substrate and multiple pixel units formed on the base substrate. Each pixel unit comprises a first electrode disposed on the base substrate, an organic light emitting layer disposed on the first electrode, and a second electrode disposed on the organic light emitting layer. The second electrodes of the multiple pixel units are connected. The OLED display substrate further comprises an electrode thickening layer on the second electrodes of the multiple pixel units. The electrode thickening layer consists of a first thickening part and a second thickening part, the first thickening part corresponds to the edge region of the OLED display substrate, and the second thickening part is disposed between two adjacent pixel units. Compared with the prior art, the display quality and electrical characteristic of OLED display products are improved through the scheme.
Description
Technical field
The present invention relates to Display Technique field, particularly relate to a kind of oled display substrate and preparation method thereof, display device
With a kind of mask plate.
Background technology
OLED (Organic Light-Emitting Diode, organic light emitting diode, be called for short OLED) display device by
In having thin, light, wide viewing angle, active illuminating, glow color continuously adjustabe, low cost, fast response time, energy consumption is little, driving is electric
Force down, operating temperature range width, production technology are simple, luminous efficiency is high and can the advantage such as Flexible Displays, be listed in great
The Display Technique of future generation of exhibition prospect.
The basic structure of OLED includes anode, negative electrode and the organic luminous layer between anode and negative electrode；OLED sends out
Light refers to that organic luminous layer, under the driving of extra electric field, is injected by the carrier of anode and negative electrode and convergence causes luminescence
Phenomenon.At present, the cathode thickness of oled display substrate is the most relatively thin, and this is easily caused display screen picture and occurs that obfuscation is bad, with
Time also can affect the electrology characteristic of substrate edge region.If increasing the cathode thickness of oled display substrate, then can be effectively
Reduce product obfuscation fraction defective, the electrology characteristic of improving product, but display screen picture generation color offset phenomenon can be caused.
Summary of the invention
The purpose of the embodiment of the present invention is to provide a kind of oled display substrate and preparation method thereof, display device and one and covers
Template, to improve display quality and the electrology characteristic of OLED display product.
Embodiments provide a kind of oled display substrate, including underlay substrate and be formed on underlay substrate
Multiple pixel cells, each pixel cell includes being positioned at the first electrode on underlay substrate, is positioned on the first electrode
Organic luminous layer and be positioned at the second electrode on organic luminous layer, the second electrode of the plurality of pixel cell is connected, institute
State oled display substrate also to include:
Being positioned at the increased electrode thickness layer on the second electrode of the plurality of pixel cell, described increased electrode thickness layer includes first
Thickened section and the second thickened section, described first thickened section is relative with the fringe region position of oled display substrate, and described second increases
Thickness portion is positioned between adjacent two pixel cells.
In the technical scheme of the embodiment of the present invention, increase by arranging electrode on the second electrode of multiple pixel cells
Thick-layer, adds the thickness of electrode between thickness of electrode and the adjacent pixel unit of the fringe region of oled display substrate, full
On the premise of the requirement of foot product optical characteristics, significantly reduce product obfuscation fraction defective, improve oled display substrate
The reliability of electrical connection of fringe region, therefore, compared to existing technology, the program improve OLED display product display quality and
Electrology characteristic.
Preferably, described second thickened section is that the strip second between adjacent two row or two row pixel cells thickens
Portion.
Further, described second thickened section is netted, the mesh of described the second netted thickened section and pixel cell position
Relatively.Use this technical scheme, make the second thickened section be dispersed throughout between adjacent two row and two row pixel cells, increase the
The area of two thickened section, reduce further product obfuscation fraction defective, improves the display quality of OLED display product.
Preferably, the live width of described second thickened section is less than the spacing between adjacent two row or two row pixel cells.So,
The second thickened section can be made to be fully located between adjacent two row pixel cells, improve the making precision of oled display substrate, carry
The high optical characteristics of product.
It is also preferred that the left the thickness of described increased electrode thickness layer is 128 angstroms～158 angstroms.Present inventor draws through overtesting,
The increased electrode thickness layer increasing above-mentioned thickness can make effectively to reduce the obfuscation fraction defective of OLED product, and it is special to obtain preferable electricity
Property.
Present invention also offers a kind of display device, including the oled display substrate described in aforementioned arbitrary technical scheme.Should
Display quality and the electrology characteristic of display device are improved.
Present invention also offers the preparation method of a kind of oled display substrate, including:
The first electrode of multiple pixel cell is formed on underlay substrate；
Organic luminous layer is formed on the first electrode；
On organic luminous layer, form the second electrode, and the second electrode of multiple pixel cell is connected；
Forming increased electrode thickness layer on the second electrode, described increased electrode thickness layer includes that the first thickened section and second thickens
Portion, described first thickened section is relative with the fringe region position of oled display substrate, and described second thickened section is positioned at adjacent two
Between pixel cell.
The oled display substrate that the method using this technical scheme to provide makes, by the second electricity at multiple pixel cells
Form the increased electrode thickness layer between the fringe region and adjacent pixel unit of oled display substrate on pole, meet product
On the premise of the requirement of optical characteristics, significantly reduce product obfuscation fraction defective, improve the marginal zone of oled display substrate
The reliability of electrical connection in territory, therefore, compared to existing technology, improves display quality and the electrology characteristic of OLED display product.
Invention additionally provides the mask plate of a kind of oled display substrate for making described in aforementioned schemes, including covering
Multiple evaporation districts that stencil body and mask plate body defining go out, described mask plate body is used for blocking multiple pixel cell, institute
State multiple evaporation district relative with the second thickened section position.
Use the mask plate that this technical scheme provides to make oled display substrate, multiple pixel cells the second electrode it
Upper evaporation forms the increased electrode thickness layer between the fringe region and adjacent pixel unit of oled display substrate, is meeting product
On the premise of the requirement of optical characteristics, significantly reduce product obfuscation fraction defective, improve the marginal zone of oled display substrate
The reliability of electrical connection in territory, therefore, compared to existing technology, improves display quality and the electrology characteristic of OLED display product.
Accompanying drawing explanation
Fig. 1 is the cross section structure schematic diagram of embodiment of the present invention oled display substrate；
Fig. 2 is the cross section structure schematic diagram of embodiment of the present invention pixel cell；
Fig. 3 is the plan structure schematic diagram of one embodiment of the invention pixel cell；
Fig. 4 is the plan structure schematic diagram of another embodiment of the present invention pixel cell；
Fig. 5 is the plan structure schematic diagram of third embodiment of the invention pixel cell；
Fig. 6 is the structural representation of embodiment of the present invention mask plate；
Fig. 7 is the preparation method flow chart of embodiment of the present invention oled display substrate.
Reference:
10-underlay substrate 20-pixel cell 21-the first electrode 22-organic luminous layer
23-the second electrode 24-increased electrode thickness layer 25-the first thickened section 26-the second thickened section
27-the first transport layer 28-the second transport layer 40-mask plate 41-mask plate body
42-is deposited with district
Detailed description of the invention
For improving display quality and the electrology characteristic of OLED display product, embodiments provide a kind of OLED and show
Substrate and preparation method thereof, display device and a kind of mask plate.For making the object, technical solutions and advantages of the present invention more clear
Chu, is described in further detail the present invention by the following examples.
As shown in Figure 1 to Figure 3, the oled display substrate that the embodiment of the present invention provides, including underlay substrate 10 and formation
Multiple pixel cells 20 on underlay substrate 10, each pixel cell 20 includes the first electricity being positioned on underlay substrate 10
Pole 21, it is positioned at the organic luminous layer 22 on the first electrode 21 and is positioned at the second electrode 23 on organic luminous layer 22, multiple
Second electrode 23 of pixel cell 20 is connected, and oled display substrate also includes:
Being positioned at the increased electrode thickness layer 24 on the second electrode 23 of multiple pixel cell 20, increased electrode thickness layer 24 includes first
Thickened section 25 and the second thickened section 26, the first thickened section 25 is relative with the fringe region position of oled display substrate, and second thickens
Portion 26 is between adjacent two pixel cells 20.
The oled display substrate that the embodiment of the present invention provides can be passive drive (Passive Matrix is called for short PM)
PMOLED display base plate, it is also possible to for active matrix driving (Active Matrix is called for short AM) AMOLED display base plate.First electrode
Be specifically as follows anode, then the second electrode and increased electrode thickness layer are negative electrode；Or, the first electrode is negative electrode, the second electrode and electricity
Pole thickening layer is anode.
In the technical scheme of the embodiment of the present invention, by arranging electricity on the second electrode 23 of multiple pixel cells 20
Pole thickening layer 24, adds the electrode between the thickness of electrode of the fringe region of oled display substrate and adjacent pixel unit 20 thick
Degree, on the premise of the requirement meeting product optical characteristics, significantly reduces product obfuscation fraction defective, improves OLED and show
The reliability of electrical connection of the fringe region of substrate, therefore, compared to existing technology, the program improves the display of OLED display product
Quality and electrology characteristic.
As in figure 2 it is shown, each pixel cell also includes the first transport layer 27 and the second transport layer 28, when the first electrode 21 is
Anode, when the second electrode 23 is negative electrode, the first transport layer 27 can be specially hole transmission layer, and the second transport layer 28 is electric transmission
Layer；When the first electrode 21 is negative electrode, and the second electrode 23 is anode, then the first transport layer 27 is electron transfer layer, the second transmission
Layer 28 is hole transmission layer.
As it is shown on figure 3, in a preferred embodiment of the invention, the second thickened section 26 is for being positioned at adjacent two row pixel lists
Strip the second thickened section between unit 20；Or, as shown in Figure 4, in another preferred embodiment of the present invention, the second thickened section
26 is strip the second thickened section between adjacent rows pixel cell 20.
Further, as it is shown in figure 5, the second thickened section 26 is netted, the mesh of the second netted thickened section 26 and pixel list
Unit 20 positions are relative.Use this technical scheme, make the second thickened section 26 be dispersed throughout two adjacent row and two row pixel cells 20
Between, increase the area of the second thickened section 26, reduce further product obfuscation fraction defective, improve OLED display product
Display quality.
When using above-mentioned embodiment illustrated in fig. 3, the live width of the second thickened section 26 is less than between adjacent two row pixel cells 20
Spacing.As such, it is possible to make the second thickened section 26 be fully located between adjacent two row pixel cells 20, improve OLED and show base
The making precision of plate, improves the optical characteristics of product.
When using above-mentioned embodiment illustrated in fig. 4, the live width of the second thickened section 26 is less than between adjacent rows pixel cell 20
Spacing.As such, it is possible to make the second thickened section 26 be fully located between adjacent rows pixel cell 20, thus without causing pixel
Thickness of electrode on unit 20 increases, and improves the optical characteristics of product.
In a preferred embodiment of the invention, the thickness of increased electrode thickness layer is 128 angstroms～158 angstroms.Present inventor
Drawing through overtesting, the increased electrode thickness layer increasing above-mentioned thickness can make effectively to reduce the obfuscation fraction defective of OLED product, and obtains
Obtain preferable electrology characteristic.
The embodiment of the present invention additionally provides a kind of display device, including the oled display substrate of aforementioned arbitrary technical scheme.
Display quality and the electrology characteristic of this display device are improved.The particular type of display device does not limits, such as, can be OLED
Display, OLED TV etc..
As it is shown in fig. 7, the embodiment of the present invention additionally provides the preparation method of a kind of oled display substrate, including:
Step 101: form the first electrode of multiple pixel cell on underlay substrate；
Step 102: form organic luminous layer on the first electrode；
Step 103: form the second electrode on organic luminous layer, and the second electrode of multiple pixel cell is connected；
Step 104: form increased electrode thickness layer on the second electrode, increased electrode thickness layer includes that the first thickened section and second increases
Thickness portion, the first thickened section is relative with the fringe region position of oled display substrate, and the second thickened section is positioned at adjacent two pixel lists
Between unit.
The oled display substrate that the method using this technical scheme to provide makes, by the second electricity at multiple pixel cells
Form the increased electrode thickness layer between the fringe region and adjacent pixel unit of oled display substrate on pole, meet product
On the premise of the requirement of optical characteristics, significantly reduce product obfuscation fraction defective, improve the marginal zone of oled display substrate
The reliability of electrical connection in territory, therefore, compared to existing technology, improves display quality and the electrology characteristic of OLED display product.
As shown in Figure 3 and Figure 6, the embodiment of the present invention is additionally provided with a kind of OLED display base for making aforementioned schemes
The mask plate 40 of plate, the multiple evaporation districts 42 defined including mask plate body 41 and mask plate body 41, mask plate body 41
For blocking multiple pixel cell 20, multiple evaporation districts 42 are relative with the second thickened section 26 position.
Mask plate shown in Fig. 6 can be used for making the pixel cell that embodiment illustrated in fig. 3 provides.This technical scheme is used to carry
The mask plate 40 of confession makes oled display substrate, is deposited with formation and is positioned at OLED on the second electrode 23 of multiple pixel cells 20
Increased electrode thickness layer between fringe region and the adjacent pixel unit 20 of display base plate, is meeting the requirement of product optical characteristics
Under premise, significantly reduce product obfuscation fraction defective, improve the reliability of electrical connection of the fringe region of oled display substrate,
Therefore, compared to existing technology, the program improves display quality and the electrology characteristic of OLED display product.
Obviously, those skilled in the art can carry out various change and the modification essence without deviating from the present invention to the present invention
God and scope.So, if these amendments of the present invention and modification belong to the scope of the claims in the present invention and equivalent technologies thereof
Within, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. an oled display substrate, including underlay substrate and be formed at the multiple pixel cells on underlay substrate, each
Pixel cell includes being positioned at the first electrode on underlay substrate, is positioned at the organic luminous layer on the first electrode and is positioned at organic
The second electrode on luminescent layer, the second electrode of the plurality of pixel cell is connected, it is characterised in that described OLED shows
Substrate also includes:
Being positioned at the increased electrode thickness layer on the second electrode of the plurality of pixel cell, described increased electrode thickness layer includes that first thickens
Portion and the second thickened section, described first thickened section is relative with the fringe region position of oled display substrate, described second thickened section
Between adjacent two pixel cells.
2. oled display substrate as claimed in claim 1, it is characterised in that described second thickened section for be positioned at adjacent two arrange or
Between two row pixel cells.
3. oled display substrate as claimed in claim 1, it is characterised in that described second thickened section is netted, described netted
The mesh of the second thickened section relative with pixel cell position.
4. oled display substrate as claimed in claim 2, it is characterised in that the live width of described second thickened section is less than adjacent two
Spacing between row or two row pixel cells.
5. the oled display substrate as described in any one of Claims 1 to 4, it is characterised in that the thickness of described increased electrode thickness layer
It it is 128 angstroms～158 angstroms.
6. a display device, it is characterised in that described display device includes the OLED as described in any one of Claims 1 to 5
Display base plate.
7. the preparation method of an oled display substrate, it is characterised in that described method includes:
The first electrode of multiple pixel cell is formed on underlay substrate；
Organic luminous layer is formed on the first electrode；
On organic luminous layer, form the second electrode, and the second electrode of multiple pixel cell is connected；
Forming increased electrode thickness layer on the second electrode, described increased electrode thickness layer includes the first thickened section and the second thickened section, institute
Stating the first thickened section relative with the fringe region position of oled display substrate, described second thickened section is positioned at adjacent two pixel lists
Between unit.
8. the mask plate being used for making oled display substrate as claimed in claim 1, it is characterised in that described mask plate
The multiple evaporation districts gone out including mask plate body and mask plate body defining, described mask plate body is used for blocking multiple pixel list
The mating shapes of unit, the plurality of evaporation district and the second thickened section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610371410.6A CN105914226A (en) | 2016-05-30 | 2016-05-30 | OLED display substrate and manufacturing method thereof, display device and mask plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610371410.6A CN105914226A (en) | 2016-05-30 | 2016-05-30 | OLED display substrate and manufacturing method thereof, display device and mask plate |
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| CN105914226A true CN105914226A (en) | 2016-08-31 |
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| CN201610371410.6A Pending CN105914226A (en) | 2016-05-30 | 2016-05-30 | OLED display substrate and manufacturing method thereof, display device and mask plate |
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