CN107658326A - Electro-luminescence display device and its dot structure and preparation method - Google Patents
Electro-luminescence display device and its dot structure and preparation method Download PDFInfo
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- CN107658326A CN107658326A CN201710165737.2A CN201710165737A CN107658326A CN 107658326 A CN107658326 A CN 107658326A CN 201710165737 A CN201710165737 A CN 201710165737A CN 107658326 A CN107658326 A CN 107658326A
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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
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
- H10K59/353—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels characterised by the geometrical arrangement of the RGB subpixels
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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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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
Abstract
The invention discloses a kind of electro-luminescence display device and its dot structure and preparation method.The electro-luminescence display device and its dot structure, by the way that the luminous zone of color identical and adjacent sub-pixel is relative and be disposed adjacent to form sub-pixel group, the luminous zone of two sub-pixels in the sub-pixel group is located in the same pixel hole of pixel defining layer, so as to exponentially add the open region area of pixel defining layer, namely add the deposition region of ink, spillover of the ink because of the too small initiation of single sub-pixel area can be prevented, being made hence for the typography for realizing high-resolution display device has significant effect.It need not significantly be changed relative to the pixel arrangement structure of traditional pixel bars band, the arrangement of its drive circuit simultaneously, be easy to compatible with existing making technology, can wide popularization and application.
Description
Technical field
The present invention relates to electroluminescent technology field, more particularly, to a kind of electro-luminescence display device and its dot structure
And preparation method.
Background technology
Using electro-luminescence display devices such as solution processing and fabricating OLED and QLED, due to its inexpensive, high production capacity, easily
It is the important directions of following Display Technique development in realize large scale the advantages that.Wherein, printing technology is considered as to realize OLED
And the electro-luminescence display device such as QLED low cost and the most effective approach of the full-color display of large area.
In typography, due to being influenceed by equipment precision and drop size, as shown in figure 1, for traditional RGB
The dot structure of strip (RGB Stripe) arrangement, when the resolution ratio of display device reaches 200ppi, the width of each sub-pixel
42 μm can be reduced to, simultaneously because the presence of pixel defining layer, the actual width of sub-pixel can be further reduced to 35 μm of left sides
The right side, and for the ink of 10pL volumes, its diameter is just up to 27 μm.Thus, if further improving resolution ratio, sub-pixel size
Can further it reduce, this is difficult to control ink in each sub-pixel not spill over pixel hole independently of each other, therefore compares and be difficult to reality
It is prepared by the printing of existing high-resolution display device.
Therefore, it is necessary to which the dot structure of sub-pixel is improved and optimized, can meet to realize that high-resolution shows
It is prepared by the typography of showing device.
The content of the invention
Based on this, it is necessary to provide the electroluminescent hair that a kind of typography for being advantageously implemented high resolution display part makes
Light display device and its dot structure and preparation method.
A kind of dot structure of electro-luminescence display device, the dot structure are included in the multiple row pixel set on substrate
Unit, each column pixel cell have multiple sub-pixels, and each sub-pixel includes the luminous zone provided with light emitting functional layer and is used for
The luminous driving area of the light emitting functional layer is driven, the driving area is provided with the drive electrically connected with the pixel electrode of the sub-pixel
Dynamic circuit, set between adjacent sub-pixel in specular in each column pixel cell, luminous zone is adjacent in each column pixel cell
Two sub-pixels set form sub-pixel group, identical, the different sub- picture of the colors of two sub-pixels in each sub-pixel group
Separated between plain group by pixel defining layer, and the luminous zone of two sub-pixels in each sub-pixel group is located at pixel circle
In the same pixel hole of given layer.
In one of the embodiments, it also is provided with pixel between the pixel electrode of two sub-pixels in each sub-pixel group
Layer is defined, and light emitting functional layer is continuous.
In one of the embodiments, the pixel between the pixel electrode of two sub-pixels in each sub-pixel group defines
The thickness of layer is less than the thickness of the pixel defining layer between adjacent sub-pixel group.
In one of the embodiments, the pixel between the pixel electrode of two sub-pixels in each sub-pixel group defines
The thickness of layer is 0.1 μm~0.2 μm, and the thickness of the pixel defining layer between adjacent sub-pixel group is 0.5 μm~2 μm.
In one of the embodiments, the color of multiple sub-pixels in pixel cell described in each column is identical.
In one of the embodiments, the drive circuit is on the substrate.
In one of the embodiments, the dot structure of the electro-luminescence display device is also included located at the driving electricity
On the flatness layer, the flatness layer, which has, to be used for for flatness layer on road, the pixel electrode and the pixel defining layer
The connecting hole electrically connected for the drive circuit with the pixel electrode.
In one of the embodiments, the top electrode of the dot structure is integrally covered in the light emitting functional layer and protrusion
The pixel defining layer surface.
A kind of preparation method of the dot structure of electro-luminescence display device, comprises the following steps：
Predeterminated position on substrate makes drive circuit；
The pixel electrode layer with multiple row pixel electrode is made on the substrate, and corresponding with the drive circuit is connected
Connect, each column pixel electrode includes multiple pixel electrodes, and each pixel electrode is respectively provided with luminous zone and driving area, the driving
Circuit is corresponding with the driving area, is set in each column pixel electrode between adjacent pixel electrode in specular, each column picture
Two pixel electrodes that luminous zone is disposed adjacent in plain electrode form pixel electrode group；
Pixel defining layer is made on the substrate, different pixel electrode groups is separated, each pixel electrode
The luminous zone of two pixel electrodes in group is located in the same pixel hole of the pixel defining layer；
Light emitting functional layer is formed on the pixel electrode layer, controls two sub-pixel electricity in each pixel electrode group
The color of light emitting functional layer on extremely is identical；
Top electrode layer is formed in the light emitting functional layer.
A kind of electro-luminescence display device, including encapsulating structure and the dot structure described in any of the above-described embodiment.
Above-mentioned electro-luminescence display device and its dot structure, by by the luminous of color identical and adjacent sub-pixel
Area is relative and is disposed adjacent to form sub-pixel group, and the luminous zone of two in the sub-pixel group sub-pixel is located at pixel defining layer
In same pixel hole, so as to exponentially add the open region area of pixel defining layer, namely the deposition region of ink is added,
Spillover of the ink because of the too small initiation of single sub-pixel area can be prevented, hence for realizing high-resolution display device
Typography make there is significant effect.Simultaneously relative to the pixel arrangement structure of traditional pixel bars band, it drives electricity
Road arrangement need not be changed significantly, be easy to compatible with existing making technology, can wide popularization and application.
Brief description of the drawings
Fig. 1 is the schematic top plan view of the dot structure of traditional electro-luminescence display device；
Fig. 2 is the schematic top plan view of the dot structure of the electro-luminescence display device of an embodiment of the present invention；
Fig. 3 is Fig. 2 I-I sectional views；
Fig. 4 is Fig. 2 II-II sectional views.
Embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give presently preferred embodiments of the present invention.But the present invention can realize in many different forms, however it is not limited to this paper institutes
The embodiment of description.On the contrary, the purpose for providing these embodiments is to make the understanding to the disclosure more thorough
Comprehensively.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more phases
The arbitrary and all combination of the Listed Items of pass.
Incorporated by reference to Fig. 2, Fig. 3 and Fig. 4, the dot structure of the electro-luminescence display device of an embodiment is included in substrate 10
The multiple row pixel cell 20 of upper setting.Each column pixel cell 20 has multiple sub-pixels 21.Each sub-pixel 21 includes being provided with
The luminous zone 211 of light emitting functional layer 212 and the driving area 213 for driving light emitting functional layer 212 to light.Driving area 213 is provided with
The drive circuit 216 electrically connected with the pixel electrode 214 of sub-pixel 21.In each column pixel cell 20 between adjacent sub-pixel 21
Set in specular.Two sub-pixels 21 that luminous zone 211 is disposed adjacent in each column pixel cell 20 form sub-pixel group
215.The color of two sub-pixels 21 in each sub-pixel group 215 is identical.Pass through pixel circle between different sub-pixel groups 215
Given layer 218 separates, and the luminous zone 211 of two sub-pixels 21 in each sub-pixel group 215 is located at the same of pixel defining layer 218
In one pixel hole, increase the depositional area of printing process ink inside so as to cost, under the precision of identical printing device,
Pixel Dimensions can be reduced at double, and then the resolution ratio for the typographical display panel that is multiplied.
In diagrammatically shown embodiment, each sub-pixel 21 is respectively provided with independent pixel electrode 214.Each sub-pixel
Pixel defining layer 218 also is provided between the pixel electrode 214 of two sub-pixels 21 in group 215, and light emitting functional layer 212 covers
The pixel defining layer 218 of the part, forms continuous structure.
Further, the pixel defining layer between the pixel electrode 214 of two sub-pixels 21 in each sub-pixel group 215
218 thickness is less than the thickness of the pixel defining layer 218 between adjacent sub-pixel group 215.Between adjacent sub-pixel group 215
Pixel defining layer 218 thickness it is larger, to surround the ink crystallizing field of sub-pixel group 215, and thickness is larger to prevent
Ink overflows, and causes color cross-talk.Pixel between the pixel electrode 214 of two sub-pixels 21 in sub-pixel group 215 defines
The thickness of layer 218 is smaller, and it covers the edge of pixel electrode 214, can prevent edge shorting or current convergence, cause defect.
Further, the thickness of the pixel defining layer 218 between the pixel electrode 214 of two sub-pixels 21 in each sub-pixel group 215
Degree is less than the thickness of light emitting functional layer 212, namely the thickness of the pixel defining layer 218 of this part can not be too thick, too thick meeting shadow
Ring after later stage ink dried into film uniformity.
In a wherein embodiment, between the pixel electrode 214 of two sub-pixels 21 in each sub-pixel group 215
The thickness of pixel defining layer 218 be 0.1 μm~0.2 μm, the thickness of the pixel defining layer 218 between adjacent sub-pixel group 215
Spend for 0.5 μm~2 μm.
In the present embodiment, the color of multiple sub-pixels 21 in each column pixel cell 20 is identical.Multiple row pixel cell
20 form Luminescent bands.In a wherein embodiment, the color of two pixel cells 20 of adjacent column is different, such as can be
Red, green and blueness are arranged in rows successively, form RGB stripe shape structure (RGB stripe).
In diagrammatically shown embodiment, drive circuit 216 is on substrate 10.Drive circuit 216 have it is multiple, it is right respectively
Each pixel electrode 214 is answered to set.Further, flatness layer 30 is additionally provided with drive circuit 216.Pixel electrode 214 and pixel circle
Given layer 218 is on flatness layer 30.Flatness layer 30 has the connection for being used for being electrically connected with pixel electrode 214 for drive circuit 216
Hole.
In diagrammatically shown embodiment, the top electrode 40 of dot structure is overall to be covered in light emitting functional layer 212 and protrusion
Pixel defining layer 218 surface.
Light emitting functional layer 212 can be organic luminescence function layer or quantum dot light emitting functional layer.Light emitting functional layer
212 can be the composite bed of single luminescent layer or luminescent layer and other functional layers, functional layer such as hole injection layer,
Hole transmission layer, electronic barrier layer, hole blocking layer, electron transfer layer and electron injecting layer etc. one or more layers, wherein, hole
Implanted layer, hole transmission layer, electronic barrier layer etc. can use printing technology to make, and it is located at luminescent layer and pixel electrode 214
Between, hole blocking layer, electron transfer layer and electron injecting layer etc. can be deposited on using vacuum evaporation process technique luminescent layer with
Between top electrode 40, it as top electrode 40, can integrally be covered in the table of the pixel defining layer 218 of luminescent layer and protrusion
Face.
The dot structure of electro-luminescence display device with said structure can make by the following method, specifically：
Step 1：Predeterminated position on substrate makes drive circuit.
Drive circuit is directly produced on substrate.
Further, in a wherein embodiment, in addition to flatness layer is made on the drive circuit of making, and in institute
State the step of connecting hole for being electrically connected for drive circuit with pixel electrode is opened up on flatness layer.
Step 2：The pixel electrode layer with multiple row pixel electrode, and connection corresponding with drive circuit are made on substrate,
Each column pixel electrode includes multiple pixel electrodes, and each pixel electrode is respectively provided with luminous zone and driving area, drive circuit with
Drive area corresponding, set in each column pixel electrode between adjacent pixel electrode in specular, sent out in each column pixel electrode
Two pixel electrodes that light area is disposed adjacent form pixel electrode group.
Step 3：Pixel defining layer is made on substrate, different pixel electrode groups is separated, each sub-pixel electricity
The luminous zone of two pixel electrodes in the group of pole is located in the same pixel hole of pixel defining layer.
Pixel defining layer can be through but not limited to half-exposure technique one-shot forming.Further, an embodiment party wherein
In formula, the thickness of the different zones of pixel defining layer is different, such as two pixel electrodes in a pixel electrode group
Between pixel defining layer thickness it is thin, such as can be 0.1 μm~0.2 μm, the picture between different subpixel electrode group
The thickness that element defines layer is thick, such as can be 0.5 μm~2 μm, but the either thicker area in the region of thinner thickness or thickness
Domain, formed by one-shaping technique.
Step 4：Light emitting functional layer is formed on pixel electrode layer, controls two sub- pictures in each pixel electrode group
The color of light emitting functional layer on plain electrode is identical.
Step 5：Top electrode layer is formed in light emitting functional layer.
Light emitting functional layer can be organic luminescence function layer or quantum dot light emitting functional layer.Light emitting functional layer can
To be the composite bed of single luminescent layer or luminescent layer and other functional layers, functional layer such as hole injection layer, hole pass
Defeated layer, electronic barrier layer, hole blocking layer, electron transfer layer and electron injecting layer etc. one or more layers, wherein, hole injection
Layer, hole transmission layer, electronic barrier layer etc. can use printing technology to make, and it is empty between luminescent layer and pixel electrode
Cave barrier layer, electron transfer layer and electron injecting layer etc. can be deposited on using vacuum evaporation process technique luminescent layer and top electrode it
Between, it as top electrode, can integrally be covered in the surface of the pixel defining layer of luminescent layer and protrusion.
A kind of electro-luminescence display device, including encapsulating structure and the above-mentioned electroluminescent in the encapsulating structure
The dot structure of display device.
Above-mentioned electro-luminescence display device and its dot structure, by by the hair of color identical and adjacent sub-pixel 21
Light area 211 is relative and is disposed adjacent to form sub-pixel group 215, the luminous zone 211 of two sub-pixels 21 in the sub-pixel group 215
In the same pixel hole of pixel defining layer 218, so as to exponentially add the open region area of pixel defining layer 218,
The deposition region of ink is added, spillover of the ink because of the too small initiation of the single area of sub-pixel 21 can be prevented, so as to
Typography for realizing high-resolution display device, which makes, has significant effect.Simultaneously relative to traditional pixel bars
The pixel arrangement structure of band, the arrangement of its drive circuit need not be changed significantly, be easy to compatible with existing making technology,
Can wide popularization and application.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of dot structure of electro-luminescence display device, it is characterised in that the dot structure, which is included on substrate, to be set
Multiple row pixel cell, each column pixel cell has multiple sub-pixels, and each sub-pixel includes the hair provided with light emitting functional layer
Light area and the driving area for driving the light emitting functional layer to light, the driving area are provided with the pixel electrode with the sub-pixel
The drive circuit of electrical connection, set between adjacent sub-pixel in specular in each column pixel cell, in each column pixel cell
Two sub-pixels that luminous zone is disposed adjacent form sub-pixel group, and the color of two sub-pixels in each sub-pixel group is identical,
Separated between different sub-pixel groups by pixel defining layer, and the luminous zone of two sub-pixels in each sub-pixel group is located at
In the same pixel hole of the pixel defining layer.
2. the dot structure of electro-luminescence display device as claimed in claim 1, it is characterised in that in each sub-pixel group
Pixel defining layer also is provided between the pixel electrode of two sub-pixels, and light emitting functional layer is continuous.
3. the dot structure of electro-luminescence display device as claimed in claim 2, it is characterised in that in each sub-pixel group
The thickness of pixel defining layer between the pixel electrode of two sub-pixels is less than the pixel defining layer between adjacent sub-pixel group
Thickness.
4. the dot structure of electro-luminescence display device as claimed in claim 4, it is characterised in that in each sub-pixel group
The thickness of pixel defining layer between the pixel electrode of two sub-pixels is 0.1 μm~0.2 μm, between adjacent sub-pixel group
The thickness of pixel defining layer is 0.5 μm~2 μm.
5. the dot structure of electro-luminescence display device as claimed in claim 1, it is characterised in that pixel cell described in each column
In multiple sub-pixels color it is identical.
6. the dot structure of electro-luminescence display device as claimed in claim 1, it is characterised in that the drive circuit is located at
On the substrate.
7. the dot structure of electro-luminescence display device as claimed in claim 6, it is characterised in that also include being located at the drive
On the flatness layer, the flatness layer has for flatness layer on dynamic circuit, the pixel electrode and the pixel defining layer
For the connecting hole electrically connected for the drive circuit with the pixel electrode.
8. such as the dot structure of electro-luminescence display device according to any one of claims 1 to 7, it is characterised in that described
The top electrode of dot structure is integrally covered in the surface of the light emitting functional layer and the pixel defining layer of protrusion.
9. a kind of preparation method of the dot structure of electro-luminescence display device, it is characterised in that comprise the following steps：
Predeterminated position on substrate makes drive circuit；
The pixel electrode layer with multiple row pixel electrode, and connection corresponding with the drive circuit are made on the substrate, often
Row pixel electrode includes multiple pixel electrodes, and each pixel electrode is respectively provided with luminous zone and driving area, the drive circuit
It is corresponding with the driving area, set in each column pixel electrode between adjacent pixel electrode in specular, each column pixel electricity
Two pixel electrodes that extremely middle luminous zone is disposed adjacent form pixel electrode group；
Pixel defining layer is made on the substrate, different pixel electrode groups is separated, in each pixel electrode group
Two pixel electrodes luminous zone be located at the pixel defining layer same pixel hole in；
Light emitting functional layer is formed on the pixel electrode layer, is controlled on two pixel electrodes in each pixel electrode group
Light emitting functional layer color it is identical；
Top electrode layer is formed in the light emitting functional layer.
A kind of 10. electro-luminescence display device, it is characterised in that including encapsulating structure and in the encapsulating structure as
Dot structure according to any one of claims 1 to 8.
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| CN201710165737.2A CN107658326A (en) | 2017-03-20 | 2017-03-20 | Electro-luminescence display device and its dot structure and preparation method |
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| CN201710165737.2A CN107658326A (en) | 2017-03-20 | 2017-03-20 | Electro-luminescence display device and its dot structure and preparation method |
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| CN109733080A (en) * | 2018-03-29 | 2019-05-10 | 广东聚华印刷显示技术有限公司 | Inkjet printing methods, device, computer equipment and storage medium |
| CN110634934A (en) * | 2019-09-29 | 2019-12-31 | 武汉天马微电子有限公司 | Display panel and display device |
| CN111243497A (en) * | 2020-03-11 | 2020-06-05 | 京东方科技集团股份有限公司 | Pixel structure, display panel and display device |
| CN112802400A (en) * | 2021-01-06 | 2021-05-14 | 季华实验室 | Display panel |
| CN115273677A (en) * | 2022-07-18 | 2022-11-01 | 深圳市华星光电半导体显示技术有限公司 | Display panel, spliced display module and manufacturing method of spliced display module |
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| CN115273677A (en) * | 2022-07-18 | 2022-11-01 | 深圳市华星光电半导体显示技术有限公司 | Display panel, spliced display module and manufacturing method of spliced display module |
| CN115273677B (en) * | 2022-07-18 | 2024-03-15 | 深圳市华星光电半导体显示技术有限公司 | Display panel, spliced display module and manufacturing method of spliced display module |
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