CN109817669A - A kind of organic light emitting diode display - Google Patents
A kind of organic light emitting diode display Download PDFInfo
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- CN109817669A CN109817669A CN201910062387.6A CN201910062387A CN109817669A CN 109817669 A CN109817669 A CN 109817669A CN 201910062387 A CN201910062387 A CN 201910062387A CN 109817669 A CN109817669 A CN 109817669A
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Abstract
The present invention provides a kind of organic light emitting diode display, which includes: anode, is set on underlay substrate；Pixel defining layer, on the underlay substrate not covered set on segment anode and by the anode；The pixel defining layer includes at least two spaced pixel definition units, is arranged on at least one pixel definition unit fluted；Metal layer is provided in the groove；Organic function layer is set on the anode, and the position of gap location between the position of the organic function layer and the two neighboring pixel definition unit is corresponding；Electron transfer layer, set on the organic function layer, the metal layer and by the organic function layer and the pixel defining layer of metal layer covering；The metal layer is connected by the electron transfer layer with the cathode；Cathode is set on the electron transfer layer.Organic light emitting diode display of the invention, can be improved display effect.
Description
[technical field]
The present invention relates to field of display technology, more particularly to a kind of organic light emitting diode display.
[background technique]
Compared with passively luminous liquid crystal display (LCD), from the organic light emitting diode display of main light emission
(Organic Light-Emitting Diode, OLED) has many advantages, such as that fast response time, contrast are high, visual angle is wide, and
Flexible Displays easy to accomplish, it is commonly used.OLED display very likely becomes the main product of next-generation display technology.
As shown in Figure 1, the OLED device 100 of existing top emitting (Top-emission) includes underlay substrate 11, anode
12, pixel defining layer 13, organic function layer 20, electron transfer layer 14 and cathode 15, organic function layer 20 are injected including hole
Layer 21, hole transmission layer 22, organic luminous layer 23, since cathode 15 is located at light emission side, therefore it is required that cathode has well thoroughly
Light attribute.
However, the common cathode material of current Top-emission is while realizing compared with high transmittance, resistance all compares
It is larger, namely electric conductivity is reduced, so as to cause large scale OLED in display, generate more serious voltage drop (IR-
Drop) phenomenon causes panel non-uniform light, reduces display effect.
Therefore, it is necessary to a kind of organic light emitting diode display be provided, to solve the problems of prior art.
[summary of the invention]
The purpose of the present invention is to provide a kind of organic light emitting diode displays, can be improved uniformity of luminance and display
Effect.
In order to solve the above technical problems, the present invention provides a kind of organic light emitting diode display comprising:
Underlay substrate；
Anode is set on the underlay substrate；
Pixel defining layer, on the underlay substrate not covered set on segment anode and by the anode；The pixel defining layer
Including at least two spaced pixel definition units, it is arranged on at least one pixel definition unit fluted；It is described recessed
Metal layer is provided in slot；
Organic function layer is set on the anode, and the position of the organic function layer and the two neighboring pixel are fixed
The position of gap location between adopted unit is corresponding；
Electron transfer layer is set to the organic function layer, the metal layer and not by the organic function layer and described
In the pixel defining layer of metal layer covering；The metal layer is connected by the electron transfer layer with the cathode；
Cathode is set on the electron transfer layer.
In organic light emitting diode display of the invention, the height of the pixel defining layer is higher than the metal layer
Highly.
In organic light emitting diode display of the invention, the thickness of the metal layer is less than the organic function layer
Thickness, and the upper surface of the metal layer and the upper surface of the organic function layer flush.
In organic light emitting diode display of the invention, the organic function layer further includes being sequentially arranged in the anode
On hole injection layer, hole transmission layer and organic luminous layer；
The upper surface of the metal layer and the upper surface of the organic luminous layer flush, and the lower surface of the metal layer with
The lower surface of the organic luminous layer flushes.
In organic light emitting diode display of the invention, the material of the electron transfer layer includes organic material and gold
Belong to nanoparticle.
In organic light emitting diode display of the invention, the metal nanoparticle includes Nano silver grain and Jenner
At least one of rice corpuscles.
In organic light emitting diode display of the invention, in the electron transfer layer, the metal nanoparticle
Mass percent range be 1%~5%.
In organic light emitting diode display of the invention, the electron transfer layer is heavy by vacuum thermal evaporation mode
Product is in the organic function layer, the metal layer and the pixel definition not covered by the organic function layer and the metal layer
It is formed on layer.
In organic light emitting diode display of the invention, the cathode is to be deposited on institute by vacuum thermal evaporation mode
It states and is formed on electron transfer layer.
In organic light emitting diode display of the invention, the organic function layer is made by inkjet printing mode
It is formed.
Organic light emitting diode display of the invention, by the way that groove is arranged on pixel definition unit, and in groove
Metal layer is set, so that metal layer is connected by electron transfer layer with cathode layer, the impedance of cathode is reduced, to reduce
Pressure drop improves display effect so that panel shines uniformly.
[Detailed description of the invention]
Fig. 1 is the structural schematic diagram of existing organic light emitting diode display；
Fig. 2 is the structural schematic diagram of organic light emitting diode display of the present invention.
[specific embodiment]
The explanation of following embodiment is to can be used to the particular implementation of implementation to illustrate the present invention with reference to additional schema
Example.The direction term that the present invention is previously mentioned, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outside", " side "
Deng being only the direction with reference to annexed drawings.Therefore, the direction term used be to illustrate and understand the present invention, rather than to
The limitation present invention.The similar unit of structure is to be given the same reference numerals in the figure.
Referring to figure 2., Fig. 2 is the structural schematic diagram of organic light emitting diode display of the present invention.
As shown in Fig. 2, organic light emitting diode display 100 of the invention is fixed including underlay substrate 11, anode 12, pixel
Adopted layer 30, organic function layer 20, electron transfer layer 33 and cathode 15.
The underlay substrate 11 may include glass substrate and the switch arrays layer on glass substrate, switch arrays layer packet
Multiple thin film transistor (TFT)s are included, anode 12 is connect with the drain electrode of thin film transistor (TFT).Anode 12 is set on the underlay substrate 11.The sun
Pole 12 is to carry out patterned process to the flood conductive layer being arranged on the underlay substrate 11 to obtain.The material of the anode 12
It can be metal material or tin indium oxide.
Pixel defining layer 30 is set on segment anode 12 and the underlay substrate 11 not covered by the anode 12.The pixel
Definition layer 30 includes two spaced pixel definition units 31, wherein being arranged on a pixel definition unit 31 fluted
311.For example the groove 311 is obtained by carrying out patterned process to pixel defining layer 30, wherein the groove 311 is fixed positioned at pixel
The top of adopted unit 31.In another embodiment, groove 311 is provided on each pixel definition unit 31.It is understood that
, pixel defining layer 30 may include more than two pixel definition units.It is provided on each pixel definition unit 31 recessed
Slot 311.
In one embodiment, in order to improve the effect for obstructing water oxygen, the cross section structure of the pixel defining layer 30 includes
Hydrophilic bank layer and hydrophobic bank layer.Hydrophilic bank layer is located at the bottom of the pixel defining layer 30, and hydrophobic bank layer setting exists
The top surface of the pixel defining layer 30.Wherein the anode 12 and hydrophilic bank layer are made to be formed by hydrophilic material, institute
It states hydrophobic bank layer and is made by hydrophobic material and formed.
Metal layer 32 is provided in the groove 311；In one embodiment, gold can be filled in the groove 311
Belong to material, to form the metal layer 32.The material of the metal layer 32 can be identical as the material of cathode.
Wherein, in order to preferably protect Organic Light Emitting Diode, the height of the pixel defining layer 30 is higher than the metal
The height of the upper surface of the height namely pixel defining layer 30 of layer 32 is higher than the height of the upper surface of the metal layer 32.
Organic function layer 20 is set on the anode 12, and the position of the organic function layer 20 and the two neighboring picture
It is fixed that the position correspondence of gap location between plain definition unit 31 namely the organic function layer 20 are located at the two neighboring pixel
In gap between adopted unit 31.Organic function layer 20 includes hole injection layer 21, hole transmission layer 22 and organic luminous layer
23, hole injection layer 21, hole transmission layer 22 and organic luminous layer 23 are sequentially located on anode 12.
Wherein, in order to improve the service life of display, the height of the pixel defining layer 30 is higher than organic function layer 20
Height namely the pixel defining layer 30 upper surface height be higher than the organic function layer 20 upper surface height,
Preferably to protect Organic Light Emitting Diode.
In one embodiment, the organic function layer 20 is to make to be formed by inkjet printing mode.
Wherein, in order to enable shining for display is more uniform, the thickness of the metal layer 32 is less than the organic functions
The thickness of layer 20, and the upper surface of the metal layer 32 and the upper surface of the organic function layer 20 flush.
In order to further such that shining for display is more uniform, the lower surface of the metal layer 32 and the organic light emission
The lower surface of layer 23 flushes, and the upper surface of the metal layer 32 and the upper surface of the organic luminous layer 23 flush.
Electron transfer layer 33 is set to the organic function layer 20, the metal layer 32 and not by the organic function layer 20
In the pixel defining layer 30 of the metal layer 32 covering；The metal layer 32 passes through the electron transfer layer 33 and the cathode
15 conductings.
In order to further decrease the impedance of cathode, in one embodiment, the electric conductivity of the electron transfer layer 33 is big
In the electric conductivity of existing electron transfer layer 33.
In order to improve the electric conductivity of electron transfer layer 33, the material of the electron transfer layer 33 includes organic material and gold
Belong to nanoparticle.Namely the material of the electron transfer layer 33 is entrained in metal nanoparticle obtained in organic material,
Namely its material is mixed by organic material and metal nanoparticle.It will of course be understood that, the material of electron transfer layer 33
It is not limited to organic material and metal nanoparticle, can also include other materials, to improve its electric conductivity.
In one embodiment, in order to further increase the electric conductivity of electron transfer layer 33, the metal nanoparticle
Including at least one of Nano silver grain and gold nanoparticle.
In order to further increase the electric conductivity of electron transfer layer 33, in the electron transfer layer, the metal nano
The mass percent range of particle is 1~5%.
In one embodiment, the electron transfer layer 33 is that organic function is deposited on by way of vacuum thermal evaporation
It ergosphere, the metal layer and is not formed in pixel defining layer that the organic function layer and the metal layer cover.
Cathode 15 is set on the electron transfer layer 33.Wherein the cathode is deposited on by way of vacuum thermal evaporation
It is formed on the electron transfer layer.Namely cathode and electron transfer layer are using the formation of identical production method.Cathode 15
Material is indium-zinc oxide (IZO) either Mg/Ag laminated film.
Since the structure to existing organic light emitting diode display improves, specifically on pixel definition unit
Groove is set, and metal layer is set in groove, so that metal layer is connected by electron transfer layer with cathode layer, is reduced
The impedance of cathode, so that panel shines uniformly, improves display effect to reduce pressure drop.
Organic light emitting diode display of the invention, by the way that groove is arranged on pixel definition unit, and in groove
Metal layer is set, so that metal layer is connected by electron transfer layer with cathode layer, the impedance of cathode is reduced, to reduce
Pressure drop improves display effect so that panel shines uniformly.
In conclusion although the present invention has been disclosed above in the preferred embodiment, but above preferred embodiment is not to limit
The system present invention, those skilled in the art can make various changes and profit without departing from the spirit and scope of the present invention
Decorations, therefore protection scope of the present invention subjects to the scope of the claims.
Claims (10)
1. a kind of organic light emitting diode display characterized by comprising
Underlay substrate；
Anode is set on the underlay substrate；
Pixel defining layer, on the underlay substrate not covered set on segment anode and by the anode；The pixel defining layer includes
At least two spaced pixel definition units, be arranged on at least one pixel definition unit it is fluted, in the groove
It is provided with metal layer；
Organic function layer is set on the anode, and the position of the organic function layer and the two neighboring pixel definition list
The position of gap location between member is corresponding；
Electron transfer layer is set to the organic function layer, the metal layer and not by the organic function layer and the metal
In the pixel defining layer of layer covering；The metal layer is connected by the electron transfer layer with the cathode；
Cathode is set on the electron transfer layer.
2. organic light emitting diode display according to claim 1, which is characterized in that the height of the pixel defining layer
Higher than the height of the metal layer.
3. organic light emitting diode display according to claim 1, which is characterized in that the thickness of the metal layer is less than
The thickness of the organic function layer, and the upper surface of the metal layer and the upper surface of the organic function layer flush.
4. organic light emitting diode display according to claim 3, which is characterized in that the organic function layer further includes
Hole injection layer, hole transmission layer and the organic luminous layer being sequentially arranged on the anode；
The upper surface of the metal layer and the upper surface of the organic luminous layer flush, and the lower surface of the metal layer with it is described
The lower surface of organic luminous layer flushes.
5. organic light emitting diode display according to claim 1, which is characterized in that
The material of the electron transfer layer includes organic material and metal nanoparticle.
6. organic light emitting diode display according to claim 5, which is characterized in that the metal nanoparticle includes
At least one of Nano silver grain and gold nanoparticle.
7. organic light emitting diode display according to claim 5, which is characterized in that in the electron transfer layer,
The mass percent range of the metal nanoparticle is 1%~5%.
8. organic light emitting diode display according to claim 1, which is characterized in that the electron transfer layer is to pass through
Vacuum thermal evaporation mode is deposited on the organic function layer, the metal layer and not by the organic function layer and the metal
It is formed in the pixel defining layer of layer covering.
9. organic light emitting diode display according to claim 1, which is characterized in that the cathode is to pass through Vacuum Heat
Vapor deposition mode deposits to be formed on the electron transport layer.
10. organic light emitting diode display according to claim 1, which is characterized in that the organic function layer is logical
It crosses inkjet printing mode and makes to be formed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910062387.6A CN109817669B (en) | 2019-01-23 | 2019-01-23 | Organic light-emitting diode display |
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|---|---|---|---|
| CN201910062387.6A CN109817669B (en) | 2019-01-23 | 2019-01-23 | Organic light-emitting diode display |
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| CN109817669B CN109817669B (en) | 2021-07-23 |
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| CN110828693A (en) * | 2019-10-30 | 2020-02-21 | 深圳市华星光电半导体显示技术有限公司 | Organic light emitting diode device and manufacturing method thereof |
| CN111129345A (en) * | 2019-12-19 | 2020-05-08 | 深圳市华星光电半导体显示技术有限公司 | Organic light emitting diode display device |
| WO2020253481A1 (en) * | 2019-06-21 | 2020-12-24 | 京东方科技集团股份有限公司 | Display substrate and preparation method therefor, and display device |
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| WO2020253481A1 (en) * | 2019-06-21 | 2020-12-24 | 京东方科技集团股份有限公司 | Display substrate and preparation method therefor, and display device |
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| US11387424B2 (en) | 2019-12-19 | 2022-07-12 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Organic light emitting diode display device with cathode layer |
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