CN108346680A - Display panel, display device and preparation method thereof - Google Patents
Display panel, display device and preparation method thereof Download PDFInfo
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- CN108346680A CN108346680A CN201710800481.8A CN201710800481A CN108346680A CN 108346680 A CN108346680 A CN 108346680A CN 201710800481 A CN201710800481 A CN 201710800481A CN 108346680 A CN108346680 A CN 108346680A
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- layer
- pixel defining
- display panel
- defining layer
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Classifications
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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
- H10K71/10—Deposition of organic active material
- H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
- H10K71/13—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing
-
- 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
- H10K59/1201—Manufacture or treatment
-
- 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
Abstract
The present invention relates to a kind of display panels, display device and preparation method thereof.The display panel includes the first pixel defining layer of substrate, the sub-pixel unit being arranged on substrate and the sub-pixel unit for limiting adjacent same color, wherein the first pixel, which defines, sets filling slot, and lyophobic layers is filled in filling slot.The display panel is made the thickness for corresponding to the light emitting functional layer in the lyophobic layers overlying regions region substantially reduce or be separated, to effectively reduce the generation of lateral leakage current, can be improved the display effect and resolution ratio of display panel due to lyophobic layers setting in filling slot.
Description
Technical field
The present invention relates to display technology fields, more particularly to a kind of display panel, display device and preparation method thereof.
Background technology
Organic electroluminescent LED (OLED) has many advantages, such as that self-luminous, reaction is fast, visual angle is wide, brightness is high, frivolous, amount
It is excellent that sub- point luminescent diode (QLED) has that photochromic purity is high, luminous quantum efficiency is high, luminescent color is easily adjusted, service life is grown etc.
Point is two Main ways of current display device research.Using solution processing and fabricating OLED display and QLED displays
Technique has many advantages, such as that at low cost, production capacity is high, is easily achieved large scale, is the important directions of the following display technology development.Meanwhile
Printing technology is considered as realizing the most effective approach of OLED and QLED low costs and the full-color display of large area.
Currently, in printing technology, by concentrating in together adjacent pixel same color sub-pixel, then pass through pixel
The optimization of structure is defined, the deposition region of ink can be expanded, to realize the preparation of high resolution display.It will but use
When the dot structure that same color sub-pixel concentrates in together, each functional layer of the sub-pixel in same ink deposition region is
One entirety easily causes lateral leakage current, and then influences entire display panel contrast and display effect.
Invention content
Based on this, it is necessary to provide a kind of display panel that can reduce lateral leakage current, display device and its making side
Method.
A kind of display panel, including substrate；
Sub-pixel unit on the substrate is set；
The first pixel defining layer on the substrate is set, and first pixel defining layer is used to limit adjacent identical
The light-emitting zone of color sub-pixels unit, first pixel defining layer are equipped with filling slot, are filled with and dredge in the filling slot
Liquid layer.
The described first middle part for defining layer that the filling slot opens up in one of the embodiments,.
The thickness of the lyophobic layers is not less than the thickness of first pixel defining layer in one of the embodiments,.
The display panel further includes the second pixel defining layer and third pixel defining layer in one of the embodiments,
Second pixel defining layer is used to limit the light-emitting zone of adjacent different colours sub-pixel unit, and the third pixel defines
Layer is arranged in second pixel defining layer, and the third pixel defining layer is used to limit the ink of same color sub-pixel unit
Crystallizing field.Same color sub-pixel is arranged in same ink crystallizing field using third pixel defining layer, each sub- picture can be reduced
The area of plain unit, and then improve the resolution ratio of display panel and display device.
The bottom width of the third pixel defining layer is less than second pixel defining layer in one of the embodiments,
Width；And/or the third pixel defining layer is gradually received from the bottom being in contact with second pixel defining layer to top
It is narrow.
The sub-pixel unit includes light emitting functional layer in one of the embodiments, and the light emitting functional layer is organic
Electroluminescent functional layer, quantum dot light emitting functional layer or the organic electroluminescent functional layer and the quantum dot light emitting function
Layer combines and is formed by mixed luminescence functional layer.
The display panel further includes first electrode layer and the second electrode lay in one of the embodiments, and described first
Electrode layer is set on the substrate, the second electrode lay be covered in the light emitting functional layer and the third pixel defining layer it
On.
The display panel is top emitting display panel in one of the embodiments, and the first electrode layer is metal
Conductive film layer, the second electrode lay are transparent organic conductive film layer；Or
The display panel is bottom emitting display panel, and the first electrode layer is metal conductive oxide film layer or organic
Conductive film layer, the second electrode lay are metallic conduction film layer.
A kind of display device includes display panel described above.
A kind of production method of display panel described above, includes the following steps：
Substrate is provided, makes the first pixel defining layer and the second pixel defining layer on the substrate；
Filling slot is made in first pixel defining layer；
Lyophobicity material is added in the filling slot, lyophobic layers are formed；
Third pixel defining layer is made in second pixel defining layer；
The ink deposition region that the third pixel defining layer defines is added in lighting function material ink, forms the work(that shines
Ergosphere.
Above-mentioned display panel includes substrate, the sub-pixel unit being arranged on substrate and for limiting adjacent same color
First pixel defining layer of sub-pixel unit wherein the first pixel, which defines, sets filling slot, and is filled with lyophoby in filling slot
Layer.Compared with the display panel of the dot structure containing optimization routine, due to the setting of lyophobic layers in filling slot, display surface is being made
When plate the thickness for corresponding to the light emitting functional layer of the lyophobic layers upper area can significantly reduce, even if being located at lyophobic layers upper area
The thickness of light emitting functional layer be less than its thickness in other regions, or even the light emitting functional layer of the corresponding lyophobic layers upper area
Separated, to effectively reduce the generation of lateral leakage current, improves the resolution ratio and display effect of display panel.
In the production method of above-mentioned display panel, in the first pixel defining layer between adjacent same color sub-pixel unit
Filling slot is made, and filling forms lyophobic layers in filling slot, to the drying process after the ink of printing light emitting functional layer
In, since the ink adhesion strength in lyophobic layers is poor, ink can bounce back, and lead to the film thickness of this lyophobic layers upper area
It is smaller or even formed without film, to separate or reduce different sons by the light emitting functional layer in each sub-pixel in ink crystallizing field
The thickness of the light emitting functional layer of pixel join domain improves the aobvious of display panel to effectively reduce the generation of lateral leakage current
Show effect.
Description of the drawings
Fig. 1 is the structural schematic diagram of the display panel of an embodiment；
Fig. 2 is the dot structure schematic diagram of the display panel of Fig. 1；
Fig. 3 is the dot structure schematic diagram of another embodiment；
Fig. 4 is the making structure chart of the first pixel electrode in the manufacturing process of the display panel in Fig. 1；
Fig. 5 is the system of the first pixel defining layer and the second pixel defining layer in the manufacturing process of the display panel in Fig. 1
Make structural schematic diagram；
Fig. 6 is that the making structure of the lyophobic layers and third pixel defining layer in the manufacturing process of the display panel in Fig. 1 is shown
It is intended to；
Fig. 7 is the manufacturing process schematic diagram of the light emitting functional layer in the manufacturing process of the display panel in Fig. 1.
Specific implementation mode
To facilitate the understanding of the present invention, below with reference to relevant drawings to invention is more fully described.In attached 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.Keep the understanding to the disclosure more thorough on the contrary, purpose of providing these embodiments is
Comprehensively.
Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to the technical field of the present invention
The normally understood meaning of technical staff is identical.Used term is intended merely to description tool in the description of the invention herein
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the Listed Items of pass.
Incorporated by reference to Fig. 1, the display panel 20 of an embodiment, including substrate 200, first electrode layer 210, the first pixel circle
Given layer 221, the second pixel defining layer 222, third pixel defining layer 223, light emitting functional layer 230 and the second electrode lay 240.
In the present embodiment, there is driving tft array on substrate 200, for driving light emitting component, realize that image is aobvious
Show.Wherein, substrate 200 can be glass substrate or flexible base board, and tft array may include non-crystalline silicon tft array, polycrystalline TFT
Array and metal oxide tft array etc..
Wherein, first electrode layer 210 is properly termed as hearth electrode or pixel electrode, and first electrode layer 210 is arranged in patterning
It is connect with driving tft array on substrate 200, and by connecting hole.
Substrate 200 is equipped with multiple pixel units.Please further combined with Fig. 2, pixel unit includes red light-emitting area
231, green light-emitting area 232 and blue light-emitting area 233.In the present embodiment, two concentrations of red light-emitting area 231 are set
It sets, two 232 concentrated settings of green light-emitting area, two blue light-emitting areas 233 concentrate color setting.In other embodiment
In, such as the dot structure in Fig. 3, including four red light-emitting areas 231 of concentrated setting respectively, four green light-emitting areas
232 and four blue light-emitting areas 233.It is appreciated that in other embodiments, it is only necessary to by shining for multiple same colors
Region concentrated setting can effectively reduce the area of each sub-pixel unit, and then improve the resolution ratio of display panel and display device.
In the present embodiment, the first pixel defining layer 221 is used to limit the hair of adjacent same color sub-pixel unit
Light region.The light-emitting zone of two same color sub-pixel units is trapped among together.Second pixel defining layer 222 is adjacent for limiting
Different colours sub-pixel unit light-emitting zone, third pixel defining layer 223 be arranged the second pixel defining layer 222 on, third
Pixel defining layer 223 is used to limit the ink crystallizing field of same color sub-pixel unit.Using third pixel defining layer 223 by phase
Adjacent same color sub-pixel setting can reduce the area of each sub-pixel unit, and then improve display in same ink crystallizing field
The resolution ratio of panel and display device.
Preferably, the first pixel defining layer 221 defines the light-emitting zone of the sub-pixel unit of two neighboring same color,
It is made of lyophily material, and thickness can be 100-300 μm, and it is good to ensure that printing technology ink deposition has behind this region
Good spreadability, to form uniform liquid film.Wherein, lyophily refers mainly to liquid and is easy to the solid table made of lyophily material
The performance that face is sprawled.If liquid is water, what lyophily referred to is exactly hydrophily.
In the present embodiment, the first pixel defines 221 and is equipped with filling slot, and lyophobic layers 2210 are filled in filling slot,
When making light emitting functional layer 230, make the region for being located at the top of lyophobic layers 2210 of light emitting functional layer 230 towards lyophobic layers 2210
Recess.Wherein, lyophobicity refers mainly to liquid and is not easy the performance that the surface of solids is sprawled made of lyophobicity material.If liquid is
Water, what lyophobicity referred to is exactly hydrophobicity.Lyophobicity material can be silica, lyophobicity photoresist or polytetrafluoroethylene (PTFE) etc..With
The display panel of dot structure containing optimization routine is compared, and since the lyophobic layers 2210 in filling slot are arranged, makes corresponding lyophobic layers
The thickness of the light emitting functional layer 230 of 2210 upper areas substantially reduces, or even corresponds to the luminous work(of 2210 upper area of lyophobic layers
Ergosphere 230 is separated, and to effectively reduce the generation of lateral leakage current, improves the display effect of display panel.
Preferably, lyophobic layers 2210 are whole fills up filling slot.Further, filling slot is set to the first pixel defining layer 221
Middle part, and the thickness of lyophobic layers 2210 is not less than thickness with the first pixel defining layer 221.
Preferably, the bottom width of third pixel defining layer 223 is less than the width of the second pixel defining layer 222, forms 0-5
μm step.Third pixel defining layer 223 is made of lyophobicity material, and thickness can be 800-1200nm, and third pixel defines
Layer 223 is gradually narrowed from the bottom being in contact with the second pixel defining layer 222 to top, can expand the deposition region of ink, is prevented
Only there is the case where ink spilling causes different colours sub-pixel colour mixture, improve product yield prepared by printing technology, improves aobvious
The display effect of showing device.
Light emitting functional layer 230 is covered in first electrode layer 210.In the present embodiment, light emitting functional layer 230 can be
Organic electroluminescent functional layer includes at least luminescent layer.Luminescent layer can be one or more layers function film layer.It is preferred that
Ground, light emitting functional layer 230 include the hole injection layer being cascading, hole transmission layer, electronic barrier layer, luminescent layer, swash
Sub- confining layers, hole blocking layer and electron injecting layer.In other embodiments, light emitting functional layer 230 can also be quantum dot
Light emitting functional layer or organic electroluminescent functional layer and quantum dot light emitting functional layer are combined the mixed luminescence functional layer to be formed.
The second electrode lay 240 is alternatively referred to as top electrode, is integrally covered in light emitting functional layer 230 and third pixel defining layer
On 223.
In the present embodiment, display panel 20 is top emitting display panel, and first electrode layer 210 is aluminium, silver, the conjunction of magnesium silver
The materials such as gold and aluminium silver alloy make the metallic conduction film layer to be formed；The second electrode lay can be the materials systems such as ITO, IZO, AZO
Make the metal conductive oxide film layer that is formed, transparent state, or the materials such as graphene, conducting polymer, which make, to be formed
Organic conductive film layer.
In other embodiments, display panel 20 can also be bottom emitting display panel, and first electrode layer 210 can be
The materials such as ITO, IZO, AZO make the metal conductive oxide film layer to be formed, or the materials such as graphene, conducting polymer
Make the organic conductive film layer formed；The second electrode lay 240 can be that the materials such as aluminium, silver, magnesium silver alloy and aluminium silver alloy make
The metallic conduction film layer of formation.
The production method of the display panel 20 of present embodiment, includes the following steps：
Please further combined with Fig. 4 and Fig. 5, the substrate 200 with driving TFT circuit is provided, first is made on substrate 200
Electrode layer 210, the first pixel defining layer 221 and the second pixel defining layer made on substrate 200 of lyophily material
222, and make filling slot in the first pixel defining layer 221.
Please further combined with Fig. 6, lyophobicity material is added in filling slot and forms lyophobic layers 2210, and in the second pixel circle
Third pixel defining layer 223 is made in given layer 222.
Please further combined with Fig. 7 and Fig. 1, lighting function material ink is added in the region between third pixel defining layer 223
Water goes solvent, drying and forming-film to form light emitting functional layer 230.Wherein, it is located at 230 court of light emitting functional layer of 2210 top of lyophobic layers
It is recessed to lyophobic layers 2210, and then the area thickness for being located at the light emitting functional layer 230 of 2210 top of lyophobic layers is made to be less than it at it
The thickness in his region, or the light emitting functional layer 230 for being located at 2210 top of lyophobic layers is made to be separated.
In light emitting functional layer 230 and third pixel defining layer 223 formed the second electrode lay 240, encapsulation to get.
In the production method of the display panel 20 of present embodiment, pass through first between adjacent identical sub-pixel unit
Filling slot is made in pixel defining layer 221, and fills lyophobicity material in filling slot and forms lyophobic layers 2210, to print
In drying process after the ink of light emitting functional layer 230, since the ink adhesion strength in lyophobic layers 2210 is poor, ink can carry out
Retraction, to keep the film thickness of this overlying regions smaller or even be formed without film, and then by each sub-pixel in ink crystallizing field
The thickness of the light emitting functional layer 230 of different subpixel join domain is separated or reduced to interior light emitting functional layer 230, to have
Effect reduces the generation of lateral leakage current, can improve the display effect and resolution ratio of display panel.
A kind of display device, including above-mentioned display panel 20.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies 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, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, 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
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of display panel, which is characterized in that including substrate；
Sub-pixel unit on the substrate is set；
The first pixel defining layer on the substrate is set, and first pixel defining layer is for limiting adjacent same color
The light-emitting zone of sub-pixel unit, first pixel defining layer are equipped with filling slot, lyophobic layers are filled in the filling slot.
2. display panel according to claim 1, which is characterized in that the filling slot opened up described first defines layer
Middle part.
3. display panel according to claim 2, which is characterized in that the thickness of the lyophobic layers is not less than first picture
Element defines the thickness of layer.
4. display panel according to any one of claims 1 to 3, which is characterized in that further include the second pixel defining layer and
Third pixel defining layer, second pixel defining layer are used to limit the light-emitting zone of adjacent different colours sub-pixel unit,
The third pixel defining layer is arranged in second pixel defining layer, and the third pixel defining layer is for limiting same color
The ink crystallizing field of sub-pixel unit.
5. display panel according to claim 4, which is characterized in that the bottom width of the third pixel defining layer is less than
The width of second pixel defining layer；And/or the third pixel defining layer is in contact from second pixel defining layer
Bottom to top gradually narrow.
6. display panel according to claim 4, which is characterized in that the sub-pixel unit includes light emitting functional layer, institute
State light emitting functional layer be organic electroluminescent functional layer, quantum dot light emitting functional layer or the organic electroluminescent functional layer and
The quantum dot light emitting functional layer combines and is formed by mixed luminescence functional layer.
7. display panel according to claim 6, which is characterized in that further include first electrode layer and the second electrode lay, institute
First electrode layer is stated on the substrate, the second electrode lay is covered in the light emitting functional layer and third pixel circle
On given layer.
8. display panel according to claim 7, which is characterized in that the display panel is top emitting display panel, institute
It is metallic conduction film layer to state first electrode layer, and the second electrode lay is transparent organic conductive film layer；Or
The display panel is bottom emitting display panel, and the first electrode layer is metal conductive oxide film layer or organic conductive
Film layer, the second electrode lay are metallic conduction film layer.
9. a kind of display device, which is characterized in that including display panel described in any item of the claim 1 to 8.
10. a kind of production method of claim 6 to 8 any one of them display panel, which is characterized in that including walking as follows
Suddenly：
Substrate is provided, makes the first pixel defining layer and the second pixel defining layer on the substrate；
Filling slot is made in first pixel defining layer；
Lyophobicity material is added in the filling slot, lyophobic layers are formed；
Third pixel defining layer is made in second pixel defining layer；
The ink crystallizing field that the third pixel defining layer defines is added in lighting function material ink, forms light emitting functional layer.
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| WO2021217746A1 (en) * | 2020-04-28 | 2021-11-04 | 深圳市华星光电半导体显示技术有限公司 | Display panel and preparation method therefor |
| CN111524947B (en) * | 2020-04-28 | 2023-02-03 | 深圳市华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| CN112201675A (en) * | 2020-09-15 | 2021-01-08 | 云谷（固安）科技有限公司 | Display substrate and preparation method thereof |
| CN112201675B (en) * | 2020-09-15 | 2022-09-27 | 云谷（固安）科技有限公司 | Display substrate and preparation method thereof |
| CN112186016A (en) * | 2020-09-29 | 2021-01-05 | 京东方科技集团股份有限公司 | Display panel, preparation method thereof and display device |
| WO2022246694A1 (en) * | 2021-05-26 | 2022-12-01 | 京东方科技集团股份有限公司 | Display substrate, preparation method, and display device |
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