CN107359274A - The preparation method of display panel, display device and display panel - Google Patents
The preparation method of display panel, display device and display panel Download PDFInfo
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- CN107359274A CN107359274A CN201710499073.3A CN201710499073A CN107359274A CN 107359274 A CN107359274 A CN 107359274A CN 201710499073 A CN201710499073 A CN 201710499073A CN 107359274 A CN107359274 A CN 107359274A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/82—Cathodes
- H10K50/822—Cathodes characterised by their shape
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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
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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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/302—Details of OLEDs of OLED structures
- H10K2102/3023—Direction of light emission
- H10K2102/3026—Top emission
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Abstract
The preparation method that the present invention discloses a kind of display panel, display device and display panel, to reduce the face internal drop of whole face common cathode layer, the transmitance of whole face common cathode layer is improved, and then lift display effect.Display panel includes underlay substrate, and is arranged at the pixel defining layer of underlay substrate side and multiple luminescent devices, and the pixel defining layer defines multiple open cells, and the multiple luminescent device is correspondingly arranged with the multiple open cells respectively, wherein：The luminescent device is included along anode, luminescent layer and the negative electrode set gradually away from underlay substrate direction；The negative electrode of each luminescent device is connected as whole face common cathode layer, and the whole face common cathode layer includes body layer, and positioned at body layer away from underlay substrate side and the bulge-structure relative with pixel defining layer position.
Description
Technical field
The present invention relates to display technology field, more particularly to the system of a kind of display panel, display device and display panel
Make method.
Background technology
Differences of the OLED (organic light-emitting diode, Organic Light Emitting Diode) according to type of drive,
PM (Passive Matrix, passive waked-up) OLED and AM (Active Matrix, driven with active matrix) OLED can be divided into
Two kinds.Wherein, AMOLED using independent TFT (Thin Film Transistor, thin film transistor (TFT)) due to going control each
Pixel cell, what each pixel cell all can be continuous and independent is luminous, therefore the flat board for being widely used in needles of various sizes shows
In showing device.
AMOLED can be divided into two kinds of top emission type and bottom emitting type according to the difference of light extraction mode, due to the picture of top emission type
Plain aperture opening ratio is larger, therefore uses top emission type structure in the industry at present more.A kind of existing top emission type AMOLED display panels, bag
The multiple pixel cells being arranged in array set on underlay substrate are included, each pixel cell includes TFT, storage capacitance, with
And the luminescent device of TFT and storage capacitance away from underlay substrate side is arranged on, wherein：Luminescent device is included along away from substrate base
Reflection anode, organic luminous layer and the negative electrode that plate direction is set gradually, reflection anode are connected with TFT；Adjacent luminescent device it is anti-
Shining sun pole and organic luminous layer are connected as whole face and are total to by pixel defining layer interval, the negative electrode of the luminescent device of each pixel cell
Use cathode layer.
Whole face common cathode layer is formed using materials such as magnesium, silver by evaporation process more.To meet transmitance requirement, thickness
What need to be done is sufficiently thin.However, according to sheet resistance Rs=electricalresistivityρ/thickness t, thickness t values are smaller, sheet resistance RsValue is bigger, and this causes
Whole face common cathode aspect internal drop is obvious, and voltage's distribiuting is uneven, and then causes the homogeneity of display picture poor, display effect
Fruit is undesirable, and for high-res product, influence then becomes apparent.
The content of the invention
The preparation method that the purpose of the embodiment of the present invention is to provide a kind of display panel, display device and display panel, with
Reduce the face internal drop of whole face common cathode layer, improve the transmitance of whole face common cathode layer, and then lift display effect.
The display panel that the embodiment of the present invention is provided, including underlay substrate, and it is arranged at the picture of underlay substrate side
Plain definition layer and multiple luminescent devices, the pixel defining layer define multiple open cells, the multiple luminescent device difference
It is correspondingly arranged with the multiple open cells, wherein：
The luminescent device is included along anode, luminescent layer and the negative electrode set gradually away from underlay substrate direction；Each institute
The negative electrode for stating luminescent device is connected as whole face common cathode layer, and the whole face common cathode layer includes body layer, and positioned at this
Body layer is away from underlay substrate side and the bulge-structure relative with pixel defining layer position.
Using technical scheme of the embodiment of the present invention, the segment thickness that whole face common cathode layer is used as luminescent device negative electrode can be with
That designs is relatively small, so as to improve the transmitance of negative electrode；Whole face common cathode layer sets the segment thickness of bulge-structure
What can be designed is relatively large, and the sheet resistance of the part is smaller, so as to reduce the face internal drop of whole face common cathode layer, lifting
The picture homogeneity of display device.Therefore, compared with prior art, the display effect of display device can be lifted.
The embodiment of the present invention also provides a kind of display device, including the display panel described in foregoing any technical scheme.Should
The transmitance of display device is higher, and picture homogeneity is preferable, and display quality is higher.
The embodiment of the present invention also provides a kind of preparation method of display panel, comprises the following steps：
Whole face common cathode layer is formed, the whole face common cathode layer includes body layer, and positioned at body layer away from lining
Substrate side and the bulge-structure relative with pixel defining layer position.
The display panel made using above-mentioned preparation method, its whole face common cathode layer are used as the part of luminescent device negative electrode
Thickness is smaller, so as to improve the transmitance of negative electrode；Whole face common cathode layer sets the segment thickness of bulge-structure larger, so as to
The face internal drop of whole face common cathode layer is reduced, improves the picture homogeneity of display device.
Brief description of the drawings
Fig. 1 is first embodiment of the invention display panel top view；
Fig. 2 is first embodiment of the invention display panel schematic cross-section；
Fig. 3 is second embodiment of the invention display panel schematic cross-section；
Fig. 4 is third embodiment of the invention display panel top view；
Fig. 5 is fourth embodiment of the invention display panel top view；
Fig. 6 is fifth embodiment of the invention display panel top view；
Fig. 7 is sixth embodiment of the invention display panel top view；
Fig. 8 is seventh embodiment of the invention display device schematic diagram；
Fig. 9 is eighth embodiment of the invention display panel preparation method flow chart.
Reference：
1- underlay substrates；2- pixel defining layers；3- luminescent devices；31- anodes；32- luminescent layers；33- negative electrodes；330- bodies
Layer；331- bulge-structures；331t- protrusion elements；39- protective layers；The bulge-structures of 331a- first；The bulge-structures of 331b- second；
34- hole injection layers；35- cushions；36- hole transmission layers；37- electron transfer layers；38- electron injecting layers；100- display surfaces
Plate；The whole face common cathode layers of 300-.
Embodiment
To reduce the face internal drop of whole face common cathode layer, the transmitance of whole face common cathode layer is improved, and then is lifted aobvious
Show effect, the embodiments of the invention provide the preparation method of a kind of display panel, display device and display panel.To make the present invention
Purpose, technical scheme and advantage it is clearer, the present invention is described in further detail by the following examples.
As depicted in figs. 1 and 2, the display panel that this embodiment of the invention provides, including underlay substrate 1, and be arranged at
The pixel defining layer 2 and multiple luminescent devices 3 of the side of underlay substrate 1, pixel defining layer 2 defines multiple open cells, foregoing
Multiple luminescent devices 3 are correspondingly arranged with aforesaid plurality of open cells respectively, wherein：
Luminescent device 3 is included along anode 31, luminescent layer 32 and the negative electrode 33 set gradually away from the direction of underlay substrate 1；Respectively
The negative electrode 33 of individual luminescent device 3 is connected as whole face common cathode layer 300, and whole face common cathode layer 300 includes body layer 330, with
And positioned at body layer 330 away from the side of underlay substrate 1 and the bulge-structure 331 relative with the position of pixel defining layer 2.
In embodiments of the present invention, the particular type of display panel is unlimited, including but not limited to OLED display panel,
Micro-LED (Micro Light Emitting Diodes, micro type light emitting diode) display panels or QLED (Quantum
Dot Light Emitting Diodes, light emitting diode with quantum dots) display panel, etc..
In above-described embodiment, luminescent device 3 can be top emission type luminescent device, and its anode 31 is reflection anode, can be adopted
With materials such as aluminum oxides, whole face common cathode layer 300 can use the of a relatively high material of transmitance, such as the material such as magnesium, silver
Matter.
The principle of luminosity of luminescent device is on display panel：Voltage is applied respectively to the anode of each luminescent device, it is each
The negative electrode of luminescent device is connected as whole face common cathode layer, and the voltage of each luminescent device anode is applied to by control, can be with
Control the electric field between anode and negative electrode, as the electronics of carrier and hole in the presence of electric field respectively from negative electrode and anode
Luminescent layer is moved to, and the convergence formation exciton that met in luminescent layer, exciton de excitation, which is lived, releases energy, and the energy of release makes to light
The light emitting molecule of layer excites, and the light emitting molecule after exciting sends visible ray by radiative relaxation.
In the prior art, whole face common cathode layer is plane, to meet the requirement of the transmitance of negative electrode, whole face common cathode
Layer thickness need to do it is sufficiently thin, according to sheet resistance Rs=electricalresistivityρ/thickness t understands that the thickness t values of whole face common cathode layer are got over
It is small, sheet resistance RsValue is bigger, and this causes the face internal drop of whole face common cathode layer obvious, so as to cause the hair of different distributions position
Electric-field intensity decay between the anode and negative electrode of optical device is obvious, due to the electric-field intensity between luminescent device anode and negative electrode
It is the key for influenceing luminosity, therefore, can causes that the homogeneity of display device display picture is poor, and display effect is undesirable.
For high-res product, the influence then becomes apparent.
And technical scheme of the embodiment of the present invention is used, whole face common cathode layer 300 is used as the portion of the negative electrode 33 of luminescent device 3
Point, its thickness can design relatively small, so that negative electrode 33 has higher transmitance, and then improve the saturating of display panel
Cross rate；Whole face common cathode layer 300 sets the part of bulge-structure 331, and its thickness can design relatively large, according to sheet resistance
RsKnowable to=electricalresistivityρ/thickness t, the sheet resistance R of the partsIt is smaller, so as to reduce whole face common cathode layer 300 on the whole
Face internal drop, the voltage's distribiuting of whole face common cathode layer 300 is more uniform, to the sun of the luminescent device of different distributions position
The influence of electric-field intensity between pole and negative electrode is smaller, and therefore, the homogeneity of display device display picture is preferable.Compared to existing skill
Art, display panel provided in an embodiment of the present invention, the display effect of display device can be lifted, shows and fills for high-res
Put, the lifting of display effect is then more obvious.
Embodiment as shown in Figure 3, luminescent device 3 can further include：Between anode 31 and luminescent layer 32
And along hole injection layer 34, cushion 35 and the hole transmission layer 36 set gradually away from the direction of underlay substrate 1, and positioned at hair
The electron transfer layer 37 and electron injecting layer 38 set gradually between photosphere 32 and negative electrode 33 and along the remote direction of underlay substrate 1；
Display panel can also include being located at whole protective layer 39 of the face common cathode layer 300 away from the side of underlay substrate 1.
Now in the art, the thickness of the whole face common cathode layer of display panel is equal to the thickness of the negative electrode of luminescent device, about
For 200 angstroms, transmitance is about 40%.In the preferred embodiment, the thickness of body layer 330 is equal to luminescent device 3
The thickness of negative electrode 33, it is 30~150 angstroms；The thickness of bulge-structure 331 is 100~5000 angstroms.Present inventor is through excessive
Found after amount experimental study and data analysis, the thickness of body layer 330 and bulge-structure 331 value within the above range, not only
Management and control is easier in manufacture craft, moreover, compared with prior art, the thickness of the negative electrode 33 of luminescent device 3 is obviously reduced so that thoroughly
The rate of mistake is obviously improved；Because the thickness of bulge-structure 331 is larger, whole face common cathode layer 300 sets the part of bulge-structure 331
Sheet resistance reduction is more obvious, so as to not only counteract the sheet resistance increase caused by negative electrode 33 is thinned, is also obviously reduced on the whole
The sheet resistance of whole face common cathode layer 300, reduces the face internal drop of whole face common cathode layer 300.
Wherein, the shape of luminescent device 3 is unlimited, such as can be rectangle, square, circle, rhombus etc..Luminescent device
3 specific arrangement mode is unlimited, traditional RGB can be used to arrange, and can also use RGB Pentile arrangements, etc..Tradition
In RGB arrangements, each pixel cell includes the luminescent device of three kinds of colors of RGB, passes through the mixed of three luminescent devices of RGB
Color realizes the display of pixel cell color.In RGB Pentile arrangements, each pixel cell only has the photophore of two kinds of colors
Part by the luminescent device of another color in pixel cell adjacent thereto, it is necessary to realize the aobvious of pixel cell color
Show.No matter which kind of arrangement mode luminescent device uses, and the shape of the open cells of pixel defining layer 2 should be with luminescent device 3
Shape matches.
As shown in figure 1, in the alternative embodiment, bulge-structure 331 is structure as a whole.Bulge-structure 331 can be according to picture
The shape of plain definition layer makes, in being evenly arranged in whole face common cathode layer, so that whole face common cathode layer is set
The part proportion of bulge-structure maximizes, and the sheet resistance of whole face common cathode layer can be substantially reduced, so as to be substantially reduced it
Face internal drop.
As shown in Figure 4, Figure 5 and Figure 6, in those embodiments of the invention, bulge-structure includes separately multiple convex
Play unit 331t.So it is easy to make bulge-structure using evaporation process, and makes precision and be easier to management and control.Protrusion element 331t
Shape it is unlimited, it is preferred to use rectangle, be easy to processing and fabricating.In other embodiments of the invention, the shape of protrusion element
L-shaped, cross, I-shaped, U-shaped or T-shaped, etc. can also be included.As shown in fig. 6, in the embodiment, protrusion element
331t shape cross.
In embodiment shown in Fig. 4 and Fig. 5, protrusion element 331t is distributed between any two adjacent luminescent devices 3.This
Sample, protrusion element 331t distribution density increase, whole face common cathode layer set the large percentage shared by bulge-structure part, from
And can further reduce the sheet resistance of whole face common cathode layer, reduce the face internal drop of whole face common cathode layer, lifting display dress
The picture homogeneity put.
As shown in figure 5 and figure 7, in this embodiment of the invention, bulge-structure includes extending in a first direction first convex
Play structure 331a.Explanation is needed exist for, the first bulge-structure 331a can be the integrative-structure shown in Fig. 7, such as Fig. 5 institutes
Show, the first bulge-structure 331a can also include multiple protrusion element 331t separately.
As shown in figure 5, in this embodiment of the invention, bulge-structure also includes the second raised knot extended in a second direction
Structure 331b, wherein, first direction intersects with second direction.Second bulge-structure 331b can include multiple raised lists separately
First 331t, or integrative-structure.So, the ratio shared by whole face common cathode layer setting bulge-structure part can be increased
Example, so as to further reduce the sheet resistance of whole face common cathode layer, the face internal drop of whole face common cathode layer is reduced, lifting is aobvious
The picture homogeneity of showing device.Meanwhile the above embodiments of the present application are using the high-precision metal mask plate of existing evaporation luminescent layer
Upper skew certain distance can be deposited to obtain the first bulge-structure in the first direction, be had in a second direction using another more
The high-precision metal mask plate of individual opening is deposited to obtain the second bulge-structure.Therefore the preparation technology of the embodiment of the present application can fill
Divide and utilize existing process, technique is simple, and cost is relatively low.In addition, relative to simultaneously be respectively provided with out in a first direction with second direction
Mouthful high-precision metal mask plate, high-precision metal mask plate and preparation method thereof, very great Cheng used by the embodiment of the present application
Reduce difficulty of throwing the net degree, and save the cost of manufacture of mask plate, therefore greatly improve process yields and reliability,
Cost is cheap, is easy to extensive commercial application.
As shown in figure 8, the embodiment of the present invention also provides a kind of display device, include the display surface of foregoing any technical scheme
Plate 100.Because the face internal drop of the whole face common cathode layer of display panel 100 is smaller, and transmitance is higher, and therefore, this is aobvious
The transmitance of showing device is higher, and picture homogeneity is preferable, and display quality is higher.The particular type of display device is unlimited, including but
It is not limited to mobile phone, tablet personal computer, display, panel TV set etc..
The embodiment of the present invention also provides a kind of preparation method of display panel, comprises the following steps：Form whole face and share the moon
Pole layer, whole face common cathode layer include body layer, and positioned at body layer away from underlay substrate side and with pixel defining layer position
Put relative bulge-structure.
Incorporated by reference to shown in Fig. 2 and Fig. 9, in a specific embodiment, display panel, which makes, to be comprised the following steps：
Step S1, pixel defining layer 2 is formed on underlay substrate 1, pixel defining layer 2 defines multiple open cells；
Step S2, the anode 31 that each open cells of respective pixel definition layer 2 are set is formed on underlay substrate 1；
Step S3, each open cells of respective pixel definition layer 2, formed in side of the anode 31 away from underlay substrate 1
Luminescent layer 32；
Step S4, whole face common cathode layer 300 is formed, whole face common cathode layer 300 includes body layer 330, and is located at
Body layer 330 is away from the side of underlay substrate 1 and the bulge-structure 331 relative with the position of pixel defining layer 2.
Wherein, step S1 and step S2 order can also exchange, i.e.,：Corresponding picture can be first formed on underlay substrate 1
The anode 31 that each open cells of plain definition layer 2 are set, then pixel defining layer 2 is formed on underlay substrate 1.
The display panel made using above-mentioned preparation method, its whole face common cathode layer are used as the part of luminescent device negative electrode
Thickness is smaller, so as to improve the transmitance of negative electrode；Whole face common cathode layer sets the segment thickness of bulge-structure larger, so as to
The face internal drop of whole face common cathode layer is reduced, improves the picture homogeneity of display device.
In above-mentioned steps S4, concrete technology type is unlimited used by making bulge-structure 331, such as can use evaporation
Technique or InkJet printing processes form bulge-structure 331.
Wherein, bulge-structure is formed using evaporation process, refers to, in certain heated under vacuum cathode material, make the moon
Then pole melt material (or distillation) condenses in substrate surface into the steam of atom, molecule or atomic group composition through mask plate
Film forming, so as to form bulge-structure.
Bulge-structure is formed using InkJet printing processes, is referred to the direct spray printing of cathode material ink in substrate surface, the moon
Pole material ink drops in substrate surface and spreads and condensed after solidifying, so as to form bulge-structure.Cathode material ink can be used and received
Meter level metallic ink, for example, the ink solution of Nano Silver, nanogold etc..Bulge-structure, technique are formed using InkJet printing processes
Easy to operate, cost is relatively low, and the influence to other Rotating fields is smaller.
In an alternative embodiment of the invention, step S4 specifically includes following sub-step：
Sub-step one, by full Vapor deposition mask plate it is deposited to form body layer 330；
Sub-step two, by high-precision metal mask plate it is deposited to form bulge-structure 331.
In the technique for making whole face common cathode layer, the open region pair of used full Vapor deposition mask plate (Open Mask)
Whole body layer 330 is answered to set；The open region of used high-precision metal mask plate (Fine Metal Mask, abbreviation FMM)
Respective protrusions structure 331 is set.
In an alternative embodiment of the invention, foregoing sub-step two, following steps are specifically included：
It is deposited to form the first bulge-structure extended in a first direction by the first high-precision metal mask plate；
It is deposited to form the second bulge-structure extended in a second direction, first direction by the second high-precision metal mask plate
Intersect with second direction.
Bulge-structure is set along both direction, can further reduce the face internal drop of whole face common cathode layer, and lifting is aobvious
The picture homogeneity of showing device；First bulge-structure and the second bulge-structure are deposited each via a high-precision metal mask plate
Formed, be easy to high-precision metal mask plate throw the net making and high-precision metal mask plate making precision it is higher.
In the preferred embodiment of the present invention, above-mentioned steps S3, specifically it may comprise steps of：Pass sequentially through position
In same high-precision metal mask plate of different set locations, evaporation forms the luminescent layer of different colours.Forming different face
In the technique of color luminescent layer, a high-precision metal mask plate is used, by the setting position for adjusting high-precision metal mask plate
Put to form the luminescent layers of different colours to be deposited respectively, it is possible to reduce the use number of Vapor deposition mask plate in display panel manufacturing process
Amount, so as to greatly save production cost.
Such as：In a specific embodiment, display panel includes that shape is identical and spacing identical red light emitting layer, green
Color luminescent layer and blue light-emitting layer.High-precision metal mask plate is placed in the by the luminescent layer of the display panel first when making
One set location, the region of each red light emitting layer to be deposited on its each open region counterpart substrate, pass through evaporation work for the first time
Skill can form each red light emitting layer on substrate；High-precision metal mask plate is adjusted to the second set location, it is now high-precision
The region of each green light emitting layer to be deposited, passes through second of evaporation process on each open region counterpart substrate of metal mask plate
Each green light emitting layer can be formed on substrate；High-precision metal mask plate is adjusted to the 3rd set location, now high accuracy is golden
Belong to the region of each blue light-emitting layer to be deposited on each open region counterpart substrate of mask plate, can by third time evaporation process
Each blue light-emitting layer is formed on substrate.
Display panel provided in an embodiment of the present invention and preparation method thereof, and display device, the negative electrode of each luminescent device
Whole face common cathode layer is connected as, the whole face common cathode layer includes body layer, and positioned at body layer away from underlay substrate
Side and the bulge-structure relative with pixel defining layer position.Whole face common cathode layer is used as the segment thickness of luminescent device negative electrode
What can be designed is relatively small, so as to improve the transmitance of negative electrode；Whole face common cathode layer sets the part of bulge-structure
Thickness can design relatively large, and the sheet resistance of the part is smaller, so as to reduce the face internal drop of whole face common cathode layer,
Lift the picture homogeneity of display device.Therefore, compared with prior art, the display effect of display device can be lifted.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (13)
1. a kind of display panel, it is characterised in that including underlay substrate, and be arranged at the pixel defining layer of underlay substrate side
With multiple luminescent devices, the pixel defining layer defines multiple open cells, the multiple luminescent device respectively with it is described more
Individual open cells are correspondingly arranged, wherein：
The luminescent device is included along anode, luminescent layer and the negative electrode set gradually away from underlay substrate direction；Each hair
The negative electrode of optical device is connected as whole face common cathode layer, and the whole face common cathode layer includes body layer, and positioned at body layer
Away from underlay substrate side and the bulge-structure relative with pixel defining layer position.
2. display panel as claimed in claim 1, it is characterised in that the body layer thickness is 30~150 angstroms；The projection
Structural thickness is 100~5000 angstroms.
3. display panel as claimed in claim 1, it is characterised in that the bulge-structure is structure as a whole.
4. display panel as claimed in claim 1, it is characterised in that the bulge-structure includes multiple raised lists separately
Member.
5. display panel as claimed in claim 4, it is characterised in that be distributed between any two adjacent luminescent devices described convex
Play unit.
6. display panel as claimed in claim 1, it is characterised in that the bulge-structure includes the extended in a first direction
One bulge-structure.
7. display panel as claimed in claim 6, it is characterised in that the bulge-structure also includes what is extended in a second direction
Second bulge-structure, the first direction intersect with the second direction.
8. a kind of display device, it is characterised in that including the display panel as described in any one of claim 1~7.
9. a kind of preparation method of display panel, it is characterised in that comprise the following steps：
Whole face common cathode layer is formed, the whole face common cathode layer includes body layer, and positioned at body layer away from substrate base
Plate side and the bulge-structure relative with pixel defining layer position.
10. preparation method as claimed in claim 9, it is characterised in that the bulge-structure is beaten using evaporation process or ink-jet
Print technique is formed.
11. preparation method as claimed in claim 9, it is characterised in that it is described to form whole face common cathode layer, specifically include with
Lower step：
It is deposited to form body layer by full Vapor deposition mask plate；
It is deposited to form the bulge-structure by high-precision metal mask plate.
12. preparation method as claimed in claim 11, it is characterised in that described to be deposited to be formed by high-precision metal mask plate
The bulge-structure, specifically includes following steps：
It is deposited to form the first bulge-structure extended in a first direction by the first high-precision metal mask plate；
It is deposited to form the second bulge-structure extended in a second direction, the first direction by the second high-precision metal mask plate
Intersect with the second direction.
13. the preparation method as described in any one of claim 9~12, it is characterised in that form whole face common cathode described
Before layer, the preparation method is further comprising the steps of：
The same high-precision metal mask plate positioned at different set locations is passed sequentially through, evaporation forms the luminous of different colours
Layer.
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| CN110148612A (en) * | 2019-04-29 | 2019-08-20 | 武汉华星光电半导体显示技术有限公司 | Organic LED display panel and preparation method thereof |
| CN110767846A (en) * | 2019-10-31 | 2020-02-07 | 京东方科技集团股份有限公司 | Display panel, preparation method thereof and display device |
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