CN107978618A - A kind of display panel, display device and display panel production method - Google Patents
A kind of display panel, display device and display panel production method Download PDFInfo
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- CN107978618A CN107978618A CN201610937464.4A CN201610937464A CN107978618A CN 107978618 A CN107978618 A CN 107978618A CN 201610937464 A CN201610937464 A CN 201610937464A CN 107978618 A CN107978618 A CN 107978618A
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- hole injection
- display panel
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- band
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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
- H10K59/30—Devices specially adapted for multicolour light emission
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/77—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate
- H01L21/78—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
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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
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The embodiment of the invention discloses a kind of display panel, display device and display panel production method.The display panel includes：Substrate；The multiple first electrodes and pixel defining layer being disposed on the substrate, pixel defining layer is with multiple first electrodes in not interlaced overlapping on substrate；The insulated barriers band being arranged in pixel defining layer；The first hole injection layer being arranged in pixel defining layer and first electrode；First hole injection layer is divided into more sub- hole injection layers by insulated barriers band, and more sub- hole injection layers are corresponded with multiple first electrodes；And organic luminous layer and second electrode on the first hole injection layer are set in turn in, wherein, organic luminous layer has multiple sub- luminescent layers for sending different colours light, and more sub- luminescent layers are corresponded with more sub- hole injection layers.The embodiment of the present invention, which solves the problems, such as during low grayscale that there are leakage current between the pixel unit of different colours, to cause colour cast.
Description
Technical field
The present embodiments relate to organic light emitting display technology, more particularly to a kind of display panel, display device and display
Panel making method.
Background technology
With the development of organic light emitting display technology, the display effect of organic light emitting display product is constantly improved,
So that the application of organic light emitting display product is more and more extensive.
The hole injection layer of organic electroluminescence display panel is all to form a flood film using evaporation process at present, in low grayscale
When, exist between the pixel unit of different colours and overstate pressure, when overstating that pressure reaches certain value, can lead between the pixel unit of different colours
Cross hole injection layer and produce leakage current so that occur colour cast during low grayscale.
The content of the invention
The present invention provides a kind of display panel, display device and display panel production method, during solving low grayscale not
The problem of with colour cast is caused there are leakage current between the pixel unit of color.
In a first aspect, an embodiment of the present invention provides a kind of display panel, the display panel includes：
Substrate；
Multiple first electrodes and pixel defining layer on the substrate are set, the pixel defining layer and the multiple the
One electrode is in not interlaced overlapping on the substrate；
The insulated barriers band being arranged in the pixel defining layer；
The first hole injection layer being arranged in the pixel defining layer and the first electrode；The insulated barriers band will
First hole injection layer is divided into more sub- hole injection layers, the multiple sub- hole injection layer and the multiple first electricity
Pole corresponds；And
The organic luminous layer and second electrode being set in turn on first hole injection layer, wherein, organic hair
Photosphere has multiple sub- luminescent layers for sending different colours light, the multiple sub- luminescent layer and the multiple sub- hole injection layer
Correspond.
Second aspect, the embodiment of the present invention additionally provide a kind of display device, and it is any that the display device includes the present invention
Display panel described in embodiment.
The third aspect, the embodiment of the present invention additionally provide a kind of display panel production method, the described method includes：
Multiple first electrodes and pixel defining layer, the pixel defining layer and the multiple first electrode are formed on substrate
In not interlaced overlapping on the substrate；
Insulated barriers band is formed in the pixel defining layer；
Form the first hole injection layer in the pixel defining layer and the first electrode, the insulated barriers band is by institute
State the first hole injection layer and be divided into more sub- hole injection layers, the multiple sub- hole injection layer and the multiple first electrode
Correspond；
Organic luminescent layer and second electrode are sequentially formed on first hole injection layer, wherein, the organic light emission
Layer has multiple sub- luminescent layers for sending different colours light, the multiple sub- luminescent layer and the multiple sub- hole injection layer one
One corresponds to.
The embodiment of the present invention will be arranged at pixel defining layer and first by setting insulated barriers band in pixel defining layer
The first hole injection layer on electrode is divided into more sub- hole injection layers, the multiple sub- hole injection layer and the multiple the
One electrode corresponds, and solves the problems, such as during low grayscale that there are leakage current between the pixel unit of different colours to cause colour cast.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of display panel in the embodiment of the present invention one；
Fig. 2 is the schematic diagram of the insulated barriers band in the embodiment of the present invention one；
Fig. 3 is a kind of a kind of structure diagram of display device of the embodiment of the present invention；
Fig. 4 is a kind of flow chart of display panel production method in the embodiment of the present invention two；
Fig. 5 a are first electrode and pixel defining layer schematic diagram in the embodiment of the present invention two；
Fig. 5 b are the insulated barriers band manufacturing process schematic diagrames in the embodiment of the present invention two；
Fig. 5 c are the insulated barriers band schematic diagrames in the embodiment of the present invention two；
Fig. 5 d are the schematic diagrames of the first hole injection layer in the embodiment of the present invention two.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that in order to just
It illustrate only part related to the present invention rather than entire infrastructure in description, attached drawing.
Embodiment one
Fig. 1 is a kind of structure diagram of display panel in the embodiment of the present invention one, with reference to figure 1, the display panel
Including：
Substrate 101；Multiple first electrodes 102 and pixel defining layer 103 on the substrate 101, pixel defining layer 103 are set
With multiple first electrodes 102 in not interlaced overlapping on substrate 101；
The insulated barriers band 104 being arranged in pixel defining layer 103；
The first hole injection layer 105 being arranged in pixel defining layer 103 and first electrode 102；Insulated barriers band 104 will
First hole injection layer 105 is divided into more sub- hole injection layers, and more sub- hole injection layers and multiple first electrodes 102 are one by one
It is corresponding；And
The organic luminous layer 106 and second electrode 107 being set in turn on the first hole injection layer 105, wherein, You Jifa
Photosphere 106 has multiple sub- luminescent layers for sending different colours light, and more sub- luminescent layers and more sub- hole injection layers are one by one
It is corresponding.
Wherein, first electrode 102 can be anode, and second electrode 107 can be cathode, and the first hole injection layer 105 can
Can use tin indium oxide using the material for being doped with highly conductive dopant, first electrode 102, each pixel unit has
One first electrode 102, second electrode 107 can use magnesium silver alloy, and whole display panel uses a monoblock second electrode
107.When display panel is applied in electric current, first electrode 102 is by the first hole injection layer 105 to 106 note of organic luminous layer
Enter hole, and second electrode 107 injects electronics to organic luminous layer 106.Injected holes and electronics are each towards the opposite electricity of band
The electrode transfer of lotus, when electronics and hole-recombination so that organic luminous layer 106 sends the light of respective color, and light passes through
The directly outgoing of second electrode 107 is emitted after the reflection of first electrode 102 by second electrode 107.
Optionally, multiple sub- luminescent layers for sending different colours light can include red light emitting layer 106R, green emitting
Layer 106G and blue light-emitting layer 106B.Correspondingly, more sub- hole injection layers can include respectively with red light emitting layer 106R, green
The sub- hole injection layer 105R of the corresponding red of color luminescent layer 106G and blue light-emitting layer 106B, the sub- hole injection layer 105G of green and
The sub- hole injection layer 105B of blueness.Since in low grayscale, the driving voltage of the pixel unit of different colours is different, makes different face
There are pressure difference between the first electrode 102 of color pixel unit, for example, in 8 grayscale, blue pixel cells and red pixel cell
First electrode 102 between pressure difference be more than 0.8V.Fig. 2 is the schematic diagram of the insulated barriers band in the embodiment of the present invention one, ginseng
Fig. 1 and Fig. 2 are examined, by setting insulated barriers band 104 in pixel defining layer 103, pixel defining layer 103 and first will be arranged at
The first hole injection layer 105 on electrode 102 is divided into more sub- hole injection layer 105R, 105G and 105B, more sub- holes
Implanted layer 105R, 105G and 105B are electric with the first of red pixel cell R, green pixel cell G and blue pixel cells B respectively
Pole 102 corresponds, and avoids and produces leakage current by the first hole injection layer 105 between the pixel unit of different colours, so that
Low grayscale colour cast is avoided, improves image displaying quality.It should be noted that insulation hinders for merely exemplary showing in Fig. 2
Every the location and shape of band 104, and other layers are not showed that, not limitation of the invention.
Display panel provided in this embodiment, by setting insulated barriers band in pixel defining layer, will be arranged at pixel
The first hole injection layer on definition layer and first electrode is divided into more sub- hole injection layers, the multiple sub- hole injection layer
Corresponded with the multiple first electrode, there are leakage current to cause color between the luminescence unit of different colours when solving low grayscale
The problem of inclined.
Optionally, the height of insulated barriers band 104 can be 1.5 times -3 times of 105 thicknesses of layers of the first hole injection layer.
Specifically, since the first hole injection layer 105 is when forming, generally pass through aperture mask version（Common mask, CMM）Evaporation
Technique forms the continuous film layer of covering first electrode 102 and pixel defining layer 103, by the height for setting insulated barriers band 104
For 1.5 times -3 times of 105 thicknesses of layers of the first hole injection layer, ensure that when forming the first hole injection layer 105, insulate every
There can be enough height by the first hole injection layer 105 " open-top " from band 104, the first hole injection layer 105 is divided into not
Continuous more sub- hole injection layers.Optionally, the height of insulated barriers band 104 can be 200A-300A.
Preferably, the height of insulated barriers band 104 can be 2 times of 105 thicknesses of layers of the first hole injection layer, not only protect
Enough height can be had by the first hole injection layer 105 " open-top " by having demonstrate,proved insulating isolation belt 104, by the first hole injection layer
105 are divided into more sub- hole injection layers, and ensure that insulated barriers band 104 can be covered by other organic films, will not
Influence the continuity of other film layers.
With reference to figure 1, the display panel can also include the second hole injection layer 108, and the second hole injection layer 108 is set
The side of organic luminous layer 106, the second hole injection layer 108 covering insulated barriers band 104 are closed in the first hole injection layer 105
With the first hole injection layer 105.Specifically, by setting the second hole injection layer 108, the sky of display panel is further increased
Cave injection efficiency, improves the luminous efficiency of organic luminous layer 106.Second hole injection layer 108 is continuous film layer, can be adopted
Formed with CMM evaporation process, reduce process costs and technology difficulty, in addition, the covering of the second hole injection layer 108 is dielectrically separated from
Band 104, avoids insulating isolation belt 104 from influencing the continuity of other film layers.In addition, noted by first electrode 102 by the first hole
Enter layer 105, can ignore in the leakage current that the second hole injection layer 108 produces, therefore noted using the second hole of continuous film layer
Colour cast will not be caused by entering layer 108.
With reference to figure 1, the display panel can also include the first hole transmission layer 109, and the first hole transmission layer 109 is set
The side of organic luminous layer 106 is closed in the second hole injection layer 108.First hole transmission layer 109 can not only improve hole
Transmission rate, and optical adjustment layer can be used as, improve the outgoing efficiency of different colours light.Specifically, different colours
The wavelength of light is different, and the thickness of required first hole transmission layer 109 is different.Exemplary, with reference to figure 1, corresponding wavelength
Longer feux rouges and green light, by setting the first hole transmission layer 109 of different-thickness, can improve the outgoing of feux rouges and green light
Efficiency.
Further, the display panel can also include：Second hole transmission layer 110, the second hole transmission layer 110 are set
It is placed in the side that the first hole transmission layer 109 closes on organic luminous layer 106.Specifically, the second hole transmission layer 110 is to lead hole
Electron type material layer is hindered, can not only improve hole transport speed, but also can play and prevent electronics from continuing to first electrode 102
The effect of operation, allows electronics compound in organic luminous layer 106 with hole, further improves luminous efficiency.
With reference to figure 1, the display panel can also include electron transfer layer 111, and electron transfer layer 111 is arranged at the second electricity
The side of organic luminous layer 106 is closed in pole 107.By setting electron transfer layer 111 to make 107 injected electrons of second electrode effective
Ground is transferred to organic luminous layer 106, improves luminous efficiency.
The present embodiment additionally provides a kind of display device, and Fig. 3 is a kind of a kind of knot of display device of the embodiment of the present invention
Structure schematic diagram, with reference to figure 3, the display device includes the display panel 100 described in any embodiment of the present invention.The display dress
Put to be the electronic equipment of such as mobile phone, tablet computer etc.
Embodiment two
A kind of display panel production method is present embodiments provided, Fig. 4 is a kind of display surface in the embodiment of the present invention two
The flow chart of board manufacturing method, with reference to figure 4, the display panel production method can include：
Step 201, form multiple first electrodes and pixel defining layer on substrate.Fig. 5 a are in the embodiment of the present invention two
First electrode and pixel defining layer schematic diagram, with reference to figure 5a, pixel defining layer 103 is with multiple first electrodes 102 on substrate 101
It is not interlaced overlapping.Specifically, each pixel unit corresponds to a first electrode 102.
Step 202, form insulated barriers band in the pixel defining layer.
Fig. 5 b are the insulated barriers band manufacturing process schematic diagrames in the embodiment of the present invention two, and Fig. 5 c are the embodiment of the present invention two
In insulated barriers band schematic diagram.With reference to figure 5b and Fig. 5 c, formation insulated barriers band 104 can wrap in pixel defining layer 103
Include：
Photoresist 104a is applied on 103 surface of pixel defining layer using ink-jet coating mode, and carries out exposed and developed shape
Into insulated barriers band 104.Specifically, existing photoresist coating method is mostly continous way coating, its coating accuracy is 1um,
Precision is relatively low, and the present embodiment is coated using ink-jet coating mode, its coating accuracy is higher, can form thickness and be less than 200A
Photoresist 104a, then pass through it is exposed and developed remove unnecessary photoresist, form insulated barriers band 104.Specifically, can be with
Using high-precision ink jet printing device coating photoresist 104a, photoresist 104a can use negtive photoresist.
Step 203, form the first hole injection layer in the pixel defining layer and the first electrode.
Fig. 5 d are the first hole injection layer schematic diagrames in the embodiment of the present invention two, with reference to figure 5d, can be deposited by CMM
Technique forms the first hole injection layer 105, since the height of insulated barriers band 104 is more than the film layer of the first hole injection layer 105
Thickness, insulated barriers band 104 are divided into more height empty by the first hole injection layer 105 " open-top ", by the first hole injection layer 105
Cave implanted layer, more sub- hole injection layers are corresponded with multiple first electrodes 102.Since the first hole injection layer 105 is not
Continuous film layer, different pixel units correspond to different sub- hole injection layers, are overstated when existing between the pixel unit of different colours
During pressure, leakage current can not be produced by the first hole injection layer 105, avoid the generation of color offset phenomenon, improve image display
Quality.
Step 204, sequentially form organic luminescent layer and second electrode on first hole injection layer.
The organic luminous layer has multiple sub- luminescent layers for sending different colours light, the multiple sub- luminescent layer and institute
More sub- hole injection layers are stated to correspond.
Further, before the organic luminous layer is formed, can also on first hole injection layer shape successively
Into the second hole injection layer, the layer such as the first hole transmission layer and the second hole transmission layer.In addition, forming the second electrode
Before, electron transfer layer can also be formed on the organic luminous layer, to improve electron transfer rate.It should be noted that
The method that each layer is formed in step 204 is similar with the prior art, and the present embodiment no longer illustrates one by one.
Display panel production method provided in this embodiment in pixel defining layer by forming insulated barriers band, and in picture
The first hole injection layer is formed on plain definition layer and first electrode, the first hole injection layer is divided into more height by insulated barriers band
Hole injection layer, more sub- hole injection layers are corresponded with multiple first electrodes, the hair of different colours when solving low grayscale
The problem of causing colour cast there are leakage current between light unit, and only need to increase by one of optical cover process, you can determine in existing pixel
Insulated barriers band is made on adopted layer, technique is simply easily achieved.
Display panel production method provided in this embodiment belongs to same with the display panel that any embodiment of the present invention provides
One inventive concept, has corresponding beneficial effect.Not ins and outs of detailed description in the present embodiment, reference can be made to the present invention appoints
The display panel that embodiment of anticipating provides.
Note that it above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although being carried out by above example to the present invention
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
It can include other more equivalent embodiments, and the scope of the present invention is determined by scope of the appended claims.
Claims (12)
- A kind of 1. display panel, it is characterised in that including：Substrate；Multiple first electrodes and pixel defining layer on the substrate, the pixel defining layer and the multiple first electricity are set Pole is in not interlaced overlapping on the substrate；The insulated barriers band being arranged in the pixel defining layer；The first hole injection layer being arranged in the pixel defining layer and the first electrode；The insulated barriers band is by described in First hole injection layer is divided into more sub- hole injection layers, the multiple sub- hole injection layer and the multiple first electrode one One corresponds to；AndThe organic luminous layer and second electrode being set in turn on first hole injection layer, wherein, the organic luminous layer With multiple sub- luminescent layers for sending different colours light, the multiple sub- luminescent layer and the multiple sub- hole injection layer are one by one It is corresponding.
- 2. display panel according to claim 1, it is characterised in that the height of the insulated barriers band is empty for described first 1.5 times -3 times of cave implanted layer thicknesses of layers.
- 3. display panel according to claim 2, it is characterised in that the height of the insulated barriers band is empty for described first 2 times of cave implanted layer thicknesses of layers.
- 4. display panel according to claim 2, it is characterised in that the height of the insulated barriers band is 200A-300A.
- 5. display panel according to claim 1, it is characterised in that the multiple son for sending different colours light shines Layer includes red light emitting layer, green light emitting layer and blue light-emitting layer.
- 6. display panel according to claim 1, it is characterised in that further include：Second hole injection layer, second hole injection layer are arranged at first hole injection layer and close on the organic light emission The side of layer, second hole injection layer cover the insulated barriers band and first hole injection layer.
- 7. display panel according to claim 6, it is characterised in that further include：First hole transmission layer, first hole transmission layer are arranged at second hole injection layer and close on the organic light emission The side of layer.
- 8. display panel according to claim 7, it is characterised in that further include：Second hole transmission layer, second hole transmission layer are arranged at first hole transmission layer and close on the organic light emission The side of layer.
- 9. display panel according to claim 1, it is characterised in that further include：Electron transfer layer, the electron transfer layer are arranged at the side that the second electrode closes on the organic luminous layer.
- 10. a kind of display device, it is characterised in that including claim 1-9 any one of them display panels.
- A kind of 11. display panel production method, it is characterised in that including：Multiple first electrodes and pixel defining layer are formed on substrate, the pixel defining layer and the multiple first electrode are in institute State not interlaced overlapping on substrate；Insulated barriers band is formed in the pixel defining layer；Form the first hole injection layer in the pixel defining layer and the first electrode, the insulated barriers band is by described One hole injection layer is divided into more sub- hole injection layers, and the multiple sub- hole injection layer and the multiple first electrode are one by one It is corresponding；Organic luminescent layer and second electrode are sequentially formed on first hole injection layer, wherein, the organic luminous layer tool There are multiple sub- luminescent layers for sending different colours light, the multiple sub- luminescent layer and the multiple sub- hole injection layer one are a pair of Should.
- 12. according to the method for claim 11, it is characterised in that insulated barriers band is formed in the pixel defining layer Step includes：Photoresist is applied in the pixel definition layer surface using ink-jet coating mode, and it is described absolutely to carry out exposed and developed formation Edge barrier tape.
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| CN201610937464.4A CN107978618B (en) | 2016-10-24 | 2016-10-24 | Display panel, display device and display panel manufacturing method |
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| CN201610937464.4A CN107978618B (en) | 2016-10-24 | 2016-10-24 | Display panel, display device and display panel manufacturing method |
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| CN111834552A (en) * | 2019-04-23 | 2020-10-27 | 上海和辉光电有限公司 | Display panel, organic light-emitting component and manufacturing method thereof |
| WO2021035419A1 (en) * | 2019-08-23 | 2021-03-04 | 京东方科技集团股份有限公司 | Display substrate and method for manufacturing same |
| CN112542495A (en) * | 2020-11-26 | 2021-03-23 | 合肥维信诺科技有限公司 | Display panel and display device |
| CN113066934A (en) * | 2021-03-12 | 2021-07-02 | 武汉华星光电半导体显示技术有限公司 | Display panel and mobile terminal |
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| CN111834552A (en) * | 2019-04-23 | 2020-10-27 | 上海和辉光电有限公司 | Display panel, organic light-emitting component and manufacturing method thereof |
| WO2021035419A1 (en) * | 2019-08-23 | 2021-03-04 | 京东方科技集团股份有限公司 | Display substrate and method for manufacturing same |
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| CN112542495A (en) * | 2020-11-26 | 2021-03-23 | 合肥维信诺科技有限公司 | Display panel and display device |
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| CN113066934A (en) * | 2021-03-12 | 2021-07-02 | 武汉华星光电半导体显示技术有限公司 | Display panel and mobile terminal |
| CN113066934B (en) * | 2021-03-12 | 2023-05-09 | 武汉华星光电半导体显示技术有限公司 | Display panel and mobile terminal |
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| CN107978618B (en) | 2020-10-30 |
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