Display panel and preparation method thereof
Technical field
The present invention relates to display technology fields more particularly to a kind of display panel and preparation method thereof.
Background technology
In recent years, OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode) technology is quickly grown,
Have become the most possible foreground technology for substituting LCD (Liquid Crystal Display, liquid crystal display).
OLED display panel is in vapor deposition common patterns layer (such as hole injection layer, electronic barrier layer, electron transfer layer, the moon
Pole electrode, encapsulated layer etc.) when generally use common mask plate, and part common patterns layer is steamed after the processing procedure of spacer
Plating, such making technology will cause to deposit some upper common patterns layer materials on the surface spacer (Photo Spacer).When
Display panel will weigh spacer wounded when being hit by the external world, and the common layer material deposited on spacer will be equally damaged.Aqueous vapor
The impaired spacer surfacing intrusion of The book of Changes causes to be formed pixel and inside contracts that (i.e. partial pixel is depth point (Dark Point).Separately
On the one hand because spacer is unbonded with cover board, cause the impact stress storage characteristics of spacer poor, impact cannot be generated fine
Resiliency.It is easy substrate, cover board rupture and frit (frit) when display panel is hit and generates crack.Thus may be used
See, the fabrication steps and panel construction reliability of the OLED display panel of the prior art are inadequate.
Invention content
The present invention provides a kind of display panel and preparation method thereof to overcome the problems of the above-mentioned prior art,
The reliability of display panel can be improved.
According to an aspect of the present invention, a kind of production method of display panel is provided, the display panel has display
Area and non-display area around viewing area, the production method include:
One substrate is provided;
In forming multiple spacers on the substrate;And
In forming at least one layer of common patterns layer on the substrate so that at least one layer common patterns layer with it is described more
The upright projection of a spacer on the substrate is not overlapped.
Optionally, the common patterns layer is formed in vapor deposition on the substrate using shared mask plate and the first mask plate,
First mask plate includes the first open region and the first shading region, the figure of the multiple spacer of the first shading area definition
Case;The common mask plate includes public open region and public shading region, common patterns layer described in the public opening area definition
Pattern, it is described using sharing mask plate and first mask plate in forming at least one layer of common patterns layer packet on the substrate
It includes:First mask plate and the common mask plate are overlapped, the upright projection of first shading region on the substrate
In the upright projection of the public open region on the substrate.
Optionally, the multiple spacer is formed using first mask plate.
Optionally, the multiple spacer is formed using second mask plate, and second mask plate is opened including second
Mouth region and the second shading region, second open region is corresponding with first shading region, second shading region and described first
Open region corresponds to, the pattern of spacer described in the second opening area definition.
Optionally, it is set forth on the substrate and forms multiple spacers and include:In forming multiple first in the viewing area
Spacer, and form the second spacer around the viewing area in the non-display area.
Optionally, the height of second spacer is 1 to 2 micron, and the width of second spacer is 100 to 200
Micron.
Optionally, further include:One cover board is provided;Protective layer is formed relative to the side of the substrate and enclose in the cover board
Around the frit of the protective layer;Make that the cover board forms the protective layer and the side of the frit is formed with the substrate
The side of spacer is opposite, presses the cover board and the substrate, and the protective layer is corresponded in the upright projection on the substrate
In the viewing area, the spacer is in contact with the protective layer, and the frit is in the upright projection position on the substrate
In the non-display area, and surround the viewing area.
Optionally, further include after pressing the cover board and the substrate:Utilize frit described in laser curing;To the guarantor
Sheath carries out heat cure.
Optionally, the adhesion range 10-50N/mm of the spacer.
Optionally, it is set forth on the substrate and forms multiple spacers and include:In forming multiple first in the viewing area
Spacer, and the second spacer around the viewing area is formed in the non-display area, second spacer is located at described
Between viewing area and the frit.
Optionally, after a substrate is provided, further include between forming multiple spacers on the substrate:In the substrate
Upper formation thin film transistor (TFT);In forming planarization layer on the thin film transistor (TFT);Pixel definition is formed on the planarization layer
Layer, the pixel defining layer have the common patterns;Wherein, the spacer is formed in the pixel defining layer.
Optionally, the common patterns layer is:Organic function layer;Cathode electrode.
According to another aspect of the present invention, a kind of display panel is also provided, with viewing area and around the non-aobvious of viewing area
Show that area, the display panel include:Substrate;Multiple spacers are located at the side of the substrate;And at least one layer of common patterns
Layer forms the side of the multiple spacer, at least one layer common patterns layer and the multiple gap positioned at the substrate
The upright projection of son on the substrate is not overlapped.
Optionally, the multiple spacer includes:Multiple first spacers are located in the viewing area;And between second
Gap is located at the non-display area, and surrounds the viewing area.
Optionally, the height of second spacer is 1 to 2 micron, and the width of second spacer is 100 to 200
Micron.
Optionally, further include:Cover board, the side that the multiple spacer is formed with the substrate are opposite;Protective layer, position
In the cover board towards the side of the substrate, the protective layer corresponds to the display in the upright projection on the substrate
Area, the spacer are in contact with the protective layer;And frit, it towards the side of the substrate and is enclosed positioned at the cover board
Around the protective layer, the frit is located at the non-display area in the upright projection on the substrate, and surrounds the display
Area.
Optionally, the adhesion range 10-50N/mm of the spacer.
Optionally, the multiple spacer includes:Multiple first spacers are located in the viewing area;And between second
Gap is located at the non-display area, and surrounds the viewing area, and second spacer is located at the viewing area and the glass
Between material.
Optionally, further include:Thin film transistor (TFT), between the substrate and the spacer;Planarization layer is located at institute
It states between thin film transistor (TFT) and the spacer;Pixel defining layer, it is described between the planarization layer and the spacer
Pixel defining layer has the common patterns.
Optionally, the common patterns layer is:Organic function layer;Cathode electrode.
Compared with prior art, the present invention has following advantage:
1) it utilizes the first mask plate when common patterns layer be deposited, covers gap sub-pattern so that common patterns layer and more
Upright projection of a spacer on substrate is not overlapped, and to prevent from forming common patterns layer on spacer, and then prevents aqueous vapor
Through being invaded between impaired spacer and the common patterns layer deposited thereon;
2) second spacer of the present invention by formation around viewing area further prevents water oxygen from invading, and promotes encapsulation effect
Fruit;
3) present invention plays the role of impact stress storage by the protective layer on cover board with spacer cooperation, hence it is evident that improves
The resistance to of display panel hits performance.
Description of the drawings
Its example embodiment is described in detail by referring to accompanying drawing, above and other feature of the invention and advantage will become
It is more obvious.
Fig. 1 shows the flow chart of the production method of display panel according to an embodiment of the invention.
Fig. 2 shows the sectional views of display panel according to an embodiment of the invention.
Fig. 3 shows the schematic diagram of common mask plate according to an embodiment of the invention.
Fig. 4 shows the schematic diagram of the first mask plate according to an embodiment of the invention.
Fig. 5 shows the flow chart of the production method of display panel according to another embodiment of the present invention.
Fig. 6 shows the schematic diagram of the second mask plate according to another embodiment of the present invention.
Fig. 7 shows the schematic diagram of the display panel according to further embodiment of this invention.
Fig. 8 shows the schematic diagram of the cover board of the display panel according to further embodiment of this invention.
Fig. 9 shows the sectional view of the display panel according to further embodiment of this invention.
Figure 10 shows the sectional view of display panel according to yet another embodiment of the invention.
Specific implementation mode
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein;On the contrary, thesing embodiments are provided so that the present invention will
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.It is identical attached in figure
Icon note indicates same or similar structure, thus will omit repetition thereof.
Described feature, structure or characteristic can be incorporated in one or more embodiments in any suitable manner
In.In the following description, many details are provided to fully understand embodiments of the present invention to provide.However,
One of ordinary skill in the art would recognize that without one or more in specific detail, or using other methods, constituent element, material
Material etc., can also put into practice technical scheme of the present invention.In some cases, be not shown in detail or describe known features, material or
Person operates to avoid the fuzzy present invention.
The attached drawing of the present invention is only used for signal relative position relation, and the size of element does not represent actual size in attached drawing
Proportionate relationship.
In order to improve the low problem of light transmittance in the prior art, a kind of display panel of present invention offer and its making side
Method.
Fig. 1 to Fig. 4 is combined to describe the production method of the display panel of one embodiment of the invention and corresponding display surface first
Plate.Fig. 1 shows the flow chart of the production method of display panel according to an embodiment of the invention.Fig. 2 shows according to this hair
The sectional view of the display panel of a bright embodiment.Fig. 3 shows the schematic diagram of common mask plate according to an embodiment of the invention.
Fig. 4 shows the schematic diagram of the first mask plate according to an embodiment of the invention.
Fig. 1 is for showing 3 steps.
Step S110:One substrate 110 is provided.
Step S120:In forming multiple spacers 120 using the first mask plate 300 on substrate 110.
Step S130:It is at least one layer of public in being formed on substrate 110 using shared mask plate 200 and the first mask plate 300
Pattern layer 130 so that at least one layer of common patterns layer 130 is not weighed with upright projection of the multiple spacers 120 on substrate 110
It is folded.The pattern that mask plate 200 defines at least one layer of common patterns layer 130 is shared, the first mask plate 300 defines spacer 120
Pattern.
Specifically, the first mask plate 300 includes the first open region 301 and the first shading region 302.First shading region 302
Define the pattern of multiple spacers 120.The step of forming multiple spacers 120 using the first mask plate 300 may include coating
Spacer material layer is coated with negative photoresist, is performed etching after being exposed development using the first mask plate 300, so that gap
Sub- material layer has the pattern of spacer 120.Common mask plate 200 includes public open region 201 and public shading region 202.It is public
Open region 201 defines the pattern of common patterns layer 130 altogether.
Above-mentioned steps S130 includes:First mask plate 300 and common mask plate 200 are overlapped, the first shading region 302 is in base
Upright projection on plate 110 is located at public open region 201 in the upright projection on substrate 110, so that common patterns layer 130
In vapor deposition, 120 pattern of spacer is covered, to which common patterns layer 130 will not be formed on spacer 120.
In this way, by step shown in FIG. 1, display panel as shown in Figure 2 can be made.Display panel shown in Fig. 2
In, common patterns layer 130 will not be formed on spacer 120, thus when display panel receives lash space 120 and damages, water
Oxygen will not enter display panel between spacer 120 and common patterns layer 130.
With reference to Fig. 2 to Fig. 6, the production method of the display panel of another embodiment of the present invention and corresponding display are described
Panel.Fig. 5 shows the flow chart of the production method of display panel according to another embodiment of the present invention.Fig. 6 shows basis
The schematic diagram of second mask plate of another embodiment of the present invention.In this example it is shown that the structure of panel and phase shown in Fig. 2
Together, and the structure of the first mask plate 300 and common mask plate 200 is also identical as shown in Fig. 3 and Fig. 4.
Fig. 5 is for showing 3 steps.
Step S210:One substrate 110 is provided.
Step S220:In forming multiple spacers 120 using the second mask plate 400 on substrate 110.
Specifically, the second mask plate 400 includes the second open region 401 and the second shading region 402.Second open region 401
Corresponding with the first shading region 302, the second shading region 402 is corresponding with the first open region 301.Second open region 401 defines spacer
120 pattern.The step of forming multiple spacers 120 using the second mask plate 400 may include the sub- material layer of coating clearance, apply
Cloth positive photoresist performs etching after being exposed development using the first mask plate 300, so that spacer material layer has gap
The pattern of son 120.
Step S230:It is at least one layer of public in being formed on substrate 110 using shared mask plate 200 and the first mask plate 300
Pattern layer 130 so that at least one layer of common patterns layer 130 is not weighed with upright projection of the multiple spacers 120 on substrate 110
It is folded.The pattern that mask plate 200 defines at least one layer of common patterns layer 130 is shared, the first mask plate 300 defines spacer 120
Pattern.
Specifically, common mask plate 200 includes public open region 201 and public shading region 202.Public open region 201
Define the pattern of common patterns layer 130.First mask plate 300 and common mask plate 200 are overlapped, the first shading region 302 is in base
Upright projection on plate 110 is located at public open region 201 in the upright projection on substrate 110, so that common patterns layer 130
In vapor deposition, 120 pattern of spacer is covered, to which common patterns layer 130 will not be formed on spacer 120.
It is similar with previous embodiment, using step shown in fig. 5, it can also make display panel as shown in Figure 2 so that
Common patterns layer 130 will not be formed on gap 120, to which when display panel receives lash space 120 and damages, water oxygen will not
Enter display panel between spacer 120 and common patterns layer 130.
Fig. 7 shows the schematic diagram of the display panel according to further embodiment of this invention.Display panel shown in Fig. 7 includes
Viewing area 101 and non-display area 102 around viewing area.To show image and video, non-display area 102 can for viewing area 101
Selection of land is used for line arrangement.There are multiple pixels 140 in viewing area 101.Fig. 1 or Fig. 5 institutes can also be used in display panel shown in Fig. 7
The production method shown is made, and further includes in above-mentioned steps S120/ steps S220:It is multiple in being formed in viewing area 101
First spacer 121, and form the second spacer 122 around viewing area 101 in non-display area 102.So so that be located at base
Spacer 120 on plate 110 includes multiple first spacers 121 in viewing area 101 and between the second of viewing area 101
Gap 122.The height H (such as Fig. 9) of second spacer 122 is 1 to 2 micron, and the width W of the second spacer 122 is 100 to 200
Micron.In the case where display panel processing procedure allows, the second spacer width increases, better to the iris action of water oxygen.As a result,
In the embodiment shown in fig. 7, the second spacer 122 further can prevent water oxygen from invading in follow-up encapsulation, promote encapsulation
Effect.
The display panel of further embodiment of this invention is described with reference to Fig. 7 to Fig. 9.Fig. 7 is shown according to the present invention again
The schematic diagram of the display panel of one embodiment.Fig. 8 shows showing for the cover board of the display panel according to further embodiment of this invention
It is intended to.Fig. 9 shows the sectional view of the display panel according to further embodiment of this invention.
In this example it is shown that the fabrication steps of panel, in addition to utilizing making side shown in Fig. 1 or Fig. 5 (in conjunction with Fig. 7)
Method is made so that display panel includes substrate 110, positioned at the multiple spacers in the side of the substrate (including viewing area 101
Interior multiple first spacers 121 and the second spacer 122 around viewing area 101) and formed positioned at substrate 110 multiple
The side at least one layer common patterns layer 130 of spacer, at least one layer of common patterns layer 130 is with multiple spacers in substrate 110
On upright projection be not overlapped, further include following steps:
Step 1:One cover board 150 is provided.
Step 2:In cover board 150 relative to the side formation protective layer 152 of substrate 110 and around the glass of protective layer 152
Material 151.
Step 3:Cover board 150 is set to form the side and the one of the formation spacer of substrate 110 of protective layer 152 and frit 151
Side is opposite, presses cover board 150 and substrate 110.Protective layer 151 corresponds to viewing area 101 in the upright projection on substrate 110,
Gap (may include the first spacer 121 and the second spacer 122) is in contact with protective layer 151.Optionally, the spacer
Adhesion range 10-50N/mm.Frit 152 is located at non-display area 102 in the upright projection on substrate 110, and around display
Area 101.Optionally, the second spacer 122 is between frit 152 and viewing area 101.
Wherein, protective layer 152 can be made of epoxy resin.Epoxy resin adhesion is strong, mechanical strength is high, solidification temperature
Width, shrinking percentage is small and light transmission rate is high.Protective layer 152 can be formed in the side of cover board 150 by modes such as silk-screen printings.
Step 4:Utilize laser curing frit 152.
Step 5:Heat cure is carried out to protective layer 151.
Above-mentioned steps 4 and step 5 can and non-sequential execution, such as step 5 can be first carried out and execute step 4 again.On in addition,
Stating Fig. 1 or shown in fig. 5 production methods can carry out before above-mentioned steps 1, can also between above-mentioned steps 2 and step 3 into
Row.Optionally, if making multiple display panels simultaneously, after the above procedure, it may also include the cutting step to display panel.
The display panel made through the above steps has resistance to hitting property.Protective layer 151 under the action of heat cure with substrate
110 spacer (the first spacer 121, and optionally the second spacer 122) is connected.It is act as relative to spacer before
Maintain substrate 110 with for 150 gap homogeneity of cover board and support cover board 150, such combination can play good impact
The effect of stress storage.When display panel can be stored a big chunk impact stress by collision time gap, hit to reduce
The damage to display element and frit 152 is hit, and then significantly improves that display panel is resistance to hit performance.Further, since on spacer
Common patterns layer is not deposited, therefore display panel can avoid aqueous vapor when being caused spacer crushing by crushing from spacer and public affairs
Intrusion causes pixel to invaginate between pattern layer altogether.
Further, increase the second spacer 122 due to around the viewing area of substrate 110 101 more, with cover board
After 150 protective layer 150 bonds, it is equivalent to and has been further added by one layer of aqueous vapor barrier layer in the encapsulation internal layer of frit 152, thus into one
Step prevents water oxygen from invading, and promotes packaging effect.
With reference to Figure 10, one more embodiment of the present invention is described.Figure 10 is shown according to yet another embodiment of the invention
The sectional view of display panel.
One substrate 510 is provided first.Thin film transistor (TFT) is formed on substrate 510.Thin film transistor (TFT) includes successively in substrate
The grid 520, gate insulation layer 530, active layer 540 and the source electrode 550 that are formed on 510 and drain electrode 560.The structure of thin film transistor (TFT)
Not so limited, the present invention can also realize the thin film transistor (TFT) of other structures, and it will not be described here.Later, in film crystalline substance
Planarization layer 570 is formed on body pipe.Pixel defining layer 590 is formed on planarization layer 570.In pixel defining layer 590 and flat
The anode 381 of OLED element 380 is formed between change layer 570.Specifically, including that an opening supplies and drain electrode on planarization layer 370
360 connections.Spacer 501 is formed in pixel defining layer 590.
Optionally, OLED element 380 is made as follows:Anode 381, anode are formed first on planarization layer 370
381 are in contact by above-mentioned opening with drain electrode 360.Anode 381 can be total reflection anode, be high reflectance metal or
Alloy firm electrode, for example, it may be the conjunction of the alloy electrode of Ag electrodes, Ag, Al electrodes, the alloy electrode of Al, Cu electrodes, Cu
The alloy electrode etc. of gold electrode, Pt electrodes or Pt.Then, organic function layer is formed in first electrode 381.Organic function layer is extremely
Include hole injection layer, luminescent layer and electron injecting layer less.Luminescent layer can send out different colours light.For example, luminescent layer can be sent out
Feux rouges, blue light and green light.Optionally, organic function layer further includes the hole transport being formed between hole injection layer and luminescent layer
Layer.In some embodiments, hole transmission layer can be omitted.In further embodiments, including multilayer hole transmission layer.This hair
The bright quantity for not limiting hole transmission layer.Optionally, organic function layer further includes the electronics note being formed on electron transfer layer
Enter layer.Later, cathode is formed on organic function layer.Cathode can be transparent electrode, be made of transparent or semitransparent material,
For example, it may be ITO, IZO, AZO, ZTO, Al and its alloy firm, Mg and its alloy firm, Ag and its alloy firm etc..It can
Selection of land, above-mentioned common patterns layer can be organic function layer and cathode electrode.For example, above-mentioned common patterns layer can be sky
Cave implanted layer, hole transmission layer, electronic barrier layer, luminescent layer, hole blocking layer, electron transfer layer, cathode electrode and package material
Material etc..
Compared with prior art, the present invention has following advantage:
1) it utilizes the first mask plate when common patterns layer be deposited, covers gap sub-pattern so that common patterns layer and more
Upright projection of a spacer on substrate is not overlapped, and to prevent from forming common patterns layer on spacer, and then prevents aqueous vapor
Through being invaded between impaired spacer and the common patterns layer deposited thereon;
2) second spacer of the present invention by formation around viewing area further prevents water oxygen from invading, and promotes encapsulation effect
Fruit;
3) present invention plays the role of impact stress storage by the protective layer on cover board with spacer cooperation, hence it is evident that improves
The resistance to of display panel hits performance.
It is particularly shown and described exemplary embodiments of the present invention above.It should be understood that the present invention is not limited to institute
Disclosed embodiment, on the contrary, it is intended to cover comprising within the scope of the appended claims various modifications and equivalent set
It changes.