CN110164942A - A kind of display panel and preparation method thereof, display device - Google Patents
A kind of display panel and preparation method thereof, display device Download PDFInfo
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- CN110164942A CN110164942A CN201910470457.1A CN201910470457A CN110164942A CN 110164942 A CN110164942 A CN 110164942A CN 201910470457 A CN201910470457 A CN 201910470457A CN 110164942 A CN110164942 A CN 110164942A
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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
- 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
- H10K59/131—Interconnections, e.g. wiring lines or terminals
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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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- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The embodiment of the invention discloses a kind of display panels and preparation method thereof, display device, display panel includes underlay substrate, multiple driving circuits and multiple organic light-emitting units, organic light-emitting units include the first electrode being independently arranged, organic luminous layer and second electrode, and driving circuit is corresponded and is electrically connected with first electrode；Display panel further includes a plurality of cathode signal metal routing, and every cathode signal metal routing is electrically connected with the second electrode for the multiple organic light-emitting units being arranged along cathode signal metal routing extending direction.Using the technical solution, reduce loss of the cathode signal in transmission process, guarantee that the cathode of each organic light-emitting units can receive same or similar cathode signal, guarantees that display panel shows that homogeneity is good；Each organic light-emitting units work independently simultaneously, will not interfere with each other between each other, avoid guaranteeing that display panel has good stability because there is a situation where obstacles to influence other organic light-emitting units for individual organic light-emitting units.
Description
Technical field
The present embodiments relate to technical field of semiconductors more particularly to a kind of display panel and preparation method thereof, display
Device.
Background technique
Currently, Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) display is an advantage over liquid crystal
Show the next-generation flat panel display of (Liquid Crystal Display, LCD).Since OLED itself can shine, nothing
Backlight is needed, therefore OLED display screen can be made lighter and thinner；OLED visible angle is bigger simultaneously, and color is more abundant, and
And can show saving electric energy, the Pixel Dimensions of OLED display screen can accomplish tens Dao several hundred microns precision, display parsing
Degree is high.Based on above-mentioned advantage, OLED show be current display field research emphasis.
The basic structure of OLED display screen be OLED pixel unit, each OLED pixel unit include anode, cathode and
Luminous organic material between anode and cathode, existing cathode is usually aluminium silver or ITO of whole face vapor deposition etc., to guarantee
Its thickness of light extraction efficiency needs very thin, causes resistance larger, traditional OLED current signal needs the conduction of cathode edge to being wanted
The centre of luminescence and other regions, conducting path is longer, and resistance is larger, in the longer situation of current signal conducting path, entirely
The problem of it is easy to appear voltage drop (IR Drop) in display circuit, that is, the voltage for being transmitted to the setting of cathode actual voltage ratio, are wanted
It is low, it is poor so as to cause display effect, and electric energy loss is more.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of display panel and preparation method thereof, display device, it is existing to solve
The uneven technical problem of display panel display caused by being connected in parallel in technology because of the cathode of all OLED pixels.
In a first aspect, the embodiment of the invention provides a kind of display panel, including underlay substrate, it is located at the underlay substrate
The multiple driving circuits and multiple organic light-emitting units of side, the organic light-emitting units include the first electrode being independently arranged,
Organic luminous layer and second electrode, the driving circuit are corresponded and are electrically connected with the first electrode；
The display panel further includes a plurality of cathode signal metal routing, every cathode signal metal routing with along institute
State the second electrode electrical connection of multiple organic light-emitting units of cathode signal metal routing extending direction setting.
Optionally, the driving circuit and the organic light-emitting units are set side by side in the underlay substrate side；
The driving circuit includes at least driving thin film transistor (TFT), in the parallel direction of plane where the underlay substrate
On, the source electrode of the driving thin film transistor (TFT) or drain electrode are electrically connected with the first electrode of the organic light-emitting units.
Optionally, the display panel further includes being located at envelope of the organic light-emitting units far from the underlay substrate side
Layer is filled, the encapsulated layer covers the driving circuit and the organic light-emitting units；
The encapsulated layer includes the first packed part and the second packed part, and first packed part is in the substrate base
There are overlapping region, second envelopes with upright projection of the driving circuit on the underlay substrate for upright projection on plate
There are overlapping regions with upright projection of the organic luminescence display unit on the underlay substrate for dress part；
First packed part and second packed part are independently arranged；Or first packed part and described
Second packed part is wholely set.
Optionally, upright projection of the driving circuit on the underlay substrate is with the cathode signal cabling described
Upright projection on underlay substrate exists overlapping.
Optionally, the driving thin film transistor (TFT) is top gate structure, and the driving thin film transistor (TFT) successively includes that stacking is set
Active layer, gate insulation layer, grid, interlayer insulating film and the source/drain set；Or the driving thin film transistor (TFT) is bottom gate knot
Structure, the driving thin film transistor (TFT) includes the grid being cascading, gate insulation layer, active layer and source/drain；
The cathode signal metal routing and the grid same layer are arranged, and the gate insulation layer covers the grid and described
Cathode signal metal routing.
Optionally, the display panel further includes the multi-strip scanning line positioned at the underlay substrate side；
The scan line is arranged and is electrically connected with the grid same layer, the extending direction of the cathode signal metal routing with
The extending direction of the scan line is identical.
The display panel further includes multiple through-hole structures and the conductive column in the through-hole structure；
The cathode signal metal routing is electrically connected with the second electrode by the conductive column.
Optionally, upright projection of the conductive column on the underlay substrate and the first electrode are in the substrate base
Upright projection on plate is staggered.
Second aspect, the embodiment of the invention also provides a kind of preparation methods of display panel, comprising:
Underlay substrate is provided；
Multiple driving circuits and multiple organic light-emitting units, the organic light-emitting units are prepared in the underlay substrate side
Including first electrode, organic luminous layer and the second electrode being independently arranged, the driving circuit and the first electrode one are a pair of
It answers and is electrically connected；
Prepare a plurality of cathode signal metal routing in the underlay substrate side, every cathode signal metal routing with
Along the second electrode electrical connection of multiple organic light-emitting units of cathode signal metal routing extending direction setting.
The third aspect, the embodiment of the invention also provides a kind of display devices, including display panel described in first aspect.
Display panel provided in an embodiment of the present invention and preparation method thereof, display device, organic light-emitting units include independent
First electrode, organic luminous layer and the second electrode of setting, while display panel further includes a plurality of cathode signal metal routing, often
Second electricity of cathode signal metal routing and multiple organic light-emitting units along the setting of cathode signal metal routing extending direction
Pole electrical connection transmits cathode signal to second electrode by cathode signal metal routing, reduces cathode signal in transmission process
In loss, guarantee display panel show homogeneity it is good；Simultaneously as each organic light-emitting units include be independently arranged
One electrode, organic luminous layer and second electrode, each organic light-emitting units work independently, will not interfere with each other, keep away between each other
Exempt to guarantee that display panel stability is good because there is a situation where obstacles to influence other organic light-emitting units for individual organic light-emitting units
It is good.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, of the invention other
Feature, objects and advantages will become more apparent upon:
Fig. 1 is a kind of structural schematic diagram of display panel in the prior art；
Fig. 2 is a kind of overlooking structure diagram of display panel provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of the section structure of the display panel along hatching A-A ' of Fig. 2 offer；
Fig. 4 is the schematic diagram of the section structure of another display panel provided in an embodiment of the present invention；
Fig. 5 is a kind of packaging effect schematic diagram of display panel provided in an embodiment of the present invention；
The packaging effect schematic diagram of Fig. 6 another display panel provided in an embodiment of the present invention；
The schematic diagram of the section structure of Fig. 7 another display panel provided in an embodiment of the present invention；
Fig. 8 is a kind of flow diagram of the preparation method of display panel provided in an embodiment of the present invention；
Fig. 9 is the flow diagram of the preparation method of another display panel provided in an embodiment of the present invention；
Figure 10 is a kind of structural schematic diagram of display device provided in an embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below with reference to attached in the embodiment of the present invention
Figure, by specific embodiment, is fully described by technical solution of the present invention.Obviously, described embodiment is of the invention
A part of the embodiment, instead of all the embodiments, based on the embodiment of the present invention, those of ordinary skill in the art are not doing
The every other embodiment obtained under the premise of creative work out, falls within the scope of protection of the present invention.
Fig. 1 is a kind of structural schematic diagram of display panel in the prior art, as shown in Figure 1, existing OLED display panel
It is merely exemplary in Fig. 1 to depict two OLED pixel units 10, each OLED pixel unit including multiple OLED pixel units 10
10 include anode 101, cathode 102 and the luminous organic material 103 between anode 101 and cathode 102.As shown in Figure 1,
Existing cathode 102 is the electrode of whole face vapor deposition, and in order to guarantee light extraction efficiency, the thickness needs of cathode 102 are very thin, leads to cathode
Resistance on 102 is larger, causes loss of the cathode signal on anode 12 larger.Also, in order to guarantee normally to go out light, cathode
102 generally use metal oxide materials, and the resistance of metal oxide materials is larger, equally will cause cathode signal in anode 12
On loss it is larger.
Based on above-mentioned technical problem, the embodiment of the present invention provides a kind of display panel, including underlay substrate, is located at substrate base
The multiple driving circuits and multiple organic light-emitting units of plate side, organic light-emitting units include the first electrode being independently arranged, have
Machine luminescent layer and second electrode, driving circuit are corresponded and are electrically connected with first electrode；Display panel further includes a plurality of cathode
Signal metal cabling, every cathode signal metal routing and multiple organic hairs along the setting of cathode signal metal routing extending direction
The second electrode of light unit is electrically connected.By adopting the above technical scheme, by adding cathode signal metal routing, cathode signal metal
Cabling is electrically connected with the second electrode for the multiple organic light-emitting units being arranged along cathode signal metal routing extending direction, due to yin
The resistance of pole signal metal cabling is much smaller than the resistance of metal oxide cathode, by cathode signal metal routing to second electrode
Cathode signal is transmitted, loss of the cathode signal in transmission process is reduced, guarantees that display panel shows that homogeneity is good；Together
When, since each organic light-emitting units include the first electrode being independently arranged, organic luminous layer and second electrode, each organic hair
Light unit works independently, and will not interfere with each other between each other, avoids having because individual organic light-emitting units generation obstacle influences other
The case where machine luminescence unit, guarantees that display panel has good stability.
It is core of the invention thought above, following will be combined with the drawings in the embodiments of the present invention, to the embodiment of the present invention
In technical solution be clearly and completely described.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Under the premise of making creative work, every other embodiment obtained belongs to the range of protection of the embodiment of the present invention.
Fig. 2 is a kind of overlooking structure diagram of display panel provided in an embodiment of the present invention, and 3 be the display that Fig. 2 is provided
Panel along hatching A-A ' the schematic diagram of the section structure, as shown in Figures 2 and 3, display panel packet provided in an embodiment of the present invention
Underlay substrate 20 is included, the multiple driving circuits 21 and multiple organic light-emitting units 22 positioned at 20 side of underlay substrate, organic light emission
Unit 22 includes first electrode 221, organic luminous layer 222 and the second electrode 223 being independently arranged, driving circuit 21 and the first electricity
Pole 221 corresponds and is electrically connected；Display panel further includes a plurality of cathode signal metal routing 23, and every cathode signal metal is walked
Line 23 is electrically connected with the second electrode 223 for multiple organic light-emitting units 22 that 23 extending direction of cathode signal metal routing is arranged.
Illustratively, first electrode 221 indicates the anode in organic light-emitting units 22, and second electrode 223 indicates organic hair
Cathode in light unit 22.Display panel provided in an embodiment of the present invention includes a plurality of cathode signal metal routing 23, every yin
Transmission has cathode signal on pole signal metal cabling 23；Every cathode signal metal routing 23 is walked with along cathode signal metal simultaneously
The second electrode 223 of multiple organic light-emitting units 22 of 23 extending direction of line setting is electrically connected, for providing to second electrode 223
Cathode signal is so either located at the organic light-emitting units 22 of display panel fringe region, or is located at display panel center
The organic light-emitting units 22 in region, the cathode signal received are conducted by corresponding cathode signal metal routing 23
, since the resistance of cathode signal metal routing 23 is much smaller than the resistance on metal oxide cathode, cathode signal cabling
Voltage drop very little on cathode signal metal routing 23 can be ignored, and guarantee is prolonged along cathode signal metal routing 23
Stretch that the cathode signal that receives in the second electrode 223 of multiple organic light-emitting units 22 of direction setting is identical or difference very
It is small, guarantee that display panel shows that homogeneity is good, greatly improves the display effect of OLED display and reduce electric energy loss.
Further, it is different from the prior art the cathode of middle whole face setting, display panel provided in an embodiment of the present invention, often
A organic light-emitting units include the first electrode 221 being independently arranged, organic luminous layer 222 and second electrode 223, and the present invention is implemented
The second electrode 223 in each organic light-emitting units 22 in example is mutually indepedent and insulation, each organic light-emitting units 22
It works independently, it is independent to show, it will not interfere between each other, it can be to avoid that may be present when an organic light emission in the prior art
When unit 22 breaks down, influence other organic light-emitting units 22, cause other organic light-emitting units 22 can not normally show or
Person shows exception, guarantees that display panel has good stability.
Illustratively, underlay substrate 20 can be rigid substrates or flexible base board, and the embodiment of the present invention is to underlay substrate 20
Material is not construed as limiting.
Optionally, organic luminous layer 222 may include hole injection layer, hole transmission layer, luminous material layer, electron-transport
Layer and electron injecting layer (not shown), hole and electronics are combined in luminous material layer to release energy, excitation light-emitting material layer
It shines.Luminous material layer can be the luminous material layer for issuing different colours, such as can be red illuminating material layer, green hair
Optical material layer, blue emitting material layer and white luminescent material layer, the embodiment of the present invention is to this without limiting.
To sum up, display panel provided in an embodiment of the present invention, by adding cathode signal metal routing, cathode signal metal
Cabling is electrically connected with the second electrode for the multiple organic light-emitting units being arranged along cathode signal metal routing extending direction, due to yin
Resistance on the signal metal cabling of pole is much smaller than the resistance of metal oxide cathode, therefore by cathode signal metal routing to the
Two electrodes transmit cathode signal, reduce loss of the cathode signal in transmission process, guarantee that display panel shows that homogeneity is good
It is good；Simultaneously as each organic light-emitting units include the first electrode being independently arranged, organic luminous layer and second electrode, each
Organic light-emitting units work independently, and will not interfere with each other between each other, avoid influencing because obstacle occurs for individual organic light-emitting units
The case where other organic light-emitting units, guarantees that display panel has good stability.
Optionally, with continued reference to shown in Fig. 2 and Fig. 3, driving circuit 21 and organic light-emitting units 22 are in underlay substrate 20 1
Side is set side by side；Driving circuit 21 includes at least driving thin film transistor (TFT) 211, in the parallel direction of 20 place plane of underlay substrate
On, drive the source electrode 2111 of thin film transistor (TFT) 211 or drain electrode 2112 and the first electrodes 221 of organic light-emitting units 22 to be electrically connected
It connects.
Illustratively, shown in comparison diagram 1 and Fig. 3, driving circuit 21 is set with 22 lamination of organic light-emitting units in the prior art
Set, i.e., organic light-emitting units 22 are located at side of the driving circuit 21 far from underlay substrate 10, be different from the prior art in scheme,
In display panel provided in an embodiment of the present invention, driving circuit 21 and organic light-emitting units 22 the same side of underlay substrate 20 simultaneously
Column setting, i.e., along any direction parallel with 20 place plane of underlay substrate, driving circuit 21 and organic light-emitting units 22 are successively
Setting so can reduce the thickness of display panel, realizes display panel slimming design, meets the lightening development of display panel
Region.
Optionally, organic light-emitting units 22 can be top light-emitting mode, and first electrode 221 can be selected opaque anti-at this time
Material is penetrated, second electrode 223 can select transparent material；Alternatively, organic light-emitting units 22 can be bottom light-emitting mode, at this time the
One electrode 221 can select transparent material, if second electrode 223 can select transparent material anode to select opaque reflecting material
Material；Alternatively, organic light-emitting units 22 can also be double-side mode, first electrode 221 and second electrode 223 can be at this time
Transparent material is selected, realizes double-sided display and transparence display.When organic light-emitting units 22 are bottom light-emitting mode or two-sided hair
When optical mode, using the technical solution of the embodiment of the present invention, i.e. driving circuit 21 and organic light-emitting units 22 is in underlay substrate 20
The same side when being set side by side, display can be improved in the light that driving circuit 21 will not stop organic light-emitting units 22 to issue, guarantee
The luminous efficiency of panel promotes the display effect of display panel.
Further, driving circuit 21 and organic light-emitting units 22 are set side by side in the same side of underlay substrate 20, driving
The source electrode 2111 of driving thin film transistor (TFT) 211 in circuit 21 or drain electrode 2112 can be directly and in organic light-emitting units 22
First electrode 221 is electrically connected, and driving circuit 21 and the electrical connection of organic light-emitting units 22 are simple.In compared with the prior art
Need to punch when organic light-emitting units 22 are electrically connected with driving circuit 21 and realize electrical connection, complex process and aligning accuracy require compared with
High technical problem, is arranged driving circuit 21 and organic light-emitting units 22 are set side by side in the same side of underlay substrate 20, technique
Simply, the preparation efficiency of display panel is high.
Optionally, with continued reference to shown in Fig. 2 and Fig. 3, upright projection and cathode of the driving circuit 21 on underlay substrate 20
Upright projection of the signal metal cabling 23 on underlay substrate 20 exists overlapping.
Illustratively, it is set side by side due to driving circuit 21 and organic light-emitting units 22 in 20 side of underlay substrate,
Driving circuit 21 is set in upright projection and cathode signal metal routing 23 the hanging down on underlay substrate 20 on underlay substrate 20
It delivers directly shadow and exists overlapping, guarantee that cathode signal metal routing 23 and the luminous zone of organic light-emitting units 22 be not be overlapped, it specifically can be with
It is not be overlapped with the first electrode 221 of organic light-emitting units 22 and organic luminous layer 222, guarantee setting cathode signal metal routing
23, which do not influence 22 normal luminous of organic light-emitting units, shows.Further, due to cathode signal metal routing 23 and organic light emission
The luminous zone of unit 22 is not overlapped, therefore cathode signal metal routing 23 can be set and have biggish line width, guarantees cathode letter
Resistance on number metal routing 23 is smaller, reduces loss of the cathode signal on cathode signal metal routing 23, guarantee with it is same
The second electrode 223 for multiple organic light-emitting units 22 that cathode signal metal routing 23 is electrically connected can receive it is identical or
Similar cathode signal guarantees that display panel shows that homogeneity is good.
Optionally, upright projection of the driving circuit 21 on underlay substrate 20 and cathode signal metal routing 23 are in substrate base
Upright projection on plate 20, which exists, to be overlapped, and cathode signal metal routing 23 can be set in driving circuit 21 far from underlay substrate 20
Side, also can be set in driving circuit 21 close to the side of underlay substrate 20 or cathode signal metal routing 23 and drive
Part film layer same layer setting in dynamic circuit 22, the embodiment of the present invention, without limiting, only need to guarantee that driving circuit 21 exists to this
There is overlapping, yin in the upright projection of upright projection and cathode signal metal routing 23 on underlay substrate 20 on underlay substrate 20
Pole signal metal cabling 23 is not be overlapped with the luminous zone of organic light-emitting units 22, guarantees setting cathode signal metal routing 23 not shadow
22 normal luminous of organic light-emitting units is rung to show；Guarantee that cathode signal metal routing 23 has biggish line width, cathode letter simultaneously
Loss number on cathode signal metal routing 23 is smaller.
Further, in order to realize the lightening design of display panel, cathode signal metal routing 23 and driving can be designed
Part film layer same layer setting in circuit 21, guarantees that display panel film layer structure is simple, being easily integrated design.For example, cathode
Signal metal cabling 23 can be arranged with the grid or source/drain same layer driven in thin film transistor (TFT) 211, below will specifically
It is bright.
Illustrate that cathode signal metal routing 23 can be with the feelings of the grid same layer setting in driving thin film transistor (TFT) 211 first
Condition.
Specifically, the driving thin film transistor (TFT) 211 in driving circuit 21 can may be bottom grating structure for top gate structure,
The embodiment of the present invention to this without limit, Fig. 3 only by drive thin film transistor (TFT) 211 be bottom grating structure for be illustrated, Fig. 4
Only by drive thin film transistor (TFT) 211 be top gate structure for be illustrated.As shown in figure 3, the driving film crystal of bottom grating structure
211 pipes include grid 2115, gate insulation layer 2114, active layer 2113 and the source/drain 2111/2112 being cascading；
Cathode signal metal routing 23 and 2115 same layer of grid are arranged, and gate insulation layer 2114 covers grid 2115 and cathode signal metal is walked
Line 23.As shown in figure 4, the driving thin film transistor (TFT) 211 of top gate structure can successively include active layer 2213, the grid being stacked
Insulating layer 2114, grid 2115, interlayer insulating film 2116 and source/drain 2111/2112.
Specifically, cathode signal metal routing 23 can be arranged with 2115 same layer of grid, guarantee display panel film layer relationship
Simply.Further, cathode signal metal routing 23 can be prepared in same step process with grid 2115, guarantee display
Panel preparation process is simple, and preparation efficiency is high.Further, with continued reference to shown in Fig. 3 and Fig. 4,2114 cover grid of gate insulation layer
Pole 2115 and cathode signal metal routing 23 can guarantee display to avoid 2115 short circuit of cathode signal metal routing 23 and grid
Panel works normally, normal to show.
As shown in Fig. 2, display panel provided in an embodiment of the present invention can also include positioned at the more of 20 side of underlay substrate
Scan line 241；Scan line 241 is arranged and is electrically connected with 2115 same layer of grid, when cathode signal metal routing 23 and grid
When 2115 same layers are arranged, the extending direction of cathode signal metal routing 23 is identical as the extending direction of scan line 241, guarantees cathode
Signal metal cabling 23 does not intersect with scan line 241, is not in the case where short cut with each other, guarantee display panel normally into
Row display.
Cathode signal metal routing 23 will be illustrated next can set with the source/drain same layer in driving thin film transistor (TFT) 211
The case where setting.
Optionally, cathode signal metal routing 23 (can not show with source electrode 2111 and drain electrode 2112 same layers setting in figure
Out), guarantee that display panel film layer relationship is simple.Further, cathode signal metal routing 23 can be with source electrode 2111 and leakage
Pole 2112 is prepared in same step process, guarantees that display panel preparation process is simple, preparation efficiency is high.Further, such as
Shown in Fig. 2, display panel provided in an embodiment of the present invention can also include the multiple data lines positioned at 20 side of underlay substrate
242；Data line 242 is arranged and is electrically connected with 2111 same layer of source electrode, when cathode signal metal routing 23 and 2111 same layer of source electrode are set
When setting, the extending direction of cathode signal metal routing 23 (not shown) identical as the extending direction of data line 242 guarantees yin
Pole signal metal cabling 23 does not intersect with data line 242, is not in guarantee that display panel is normal the case where short cut with each other
It is shown.
Fig. 5 is the overlooking structure diagram of another display panel provided in an embodiment of the present invention, Fig. 6 embodiment of the present invention
The overlooking structure diagram of another display panel of offer, Fig. 7 another display panel provided in an embodiment of the present invention cut open
Face structural schematic diagram, in conjunction with as shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, display panel provided in an embodiment of the present invention can be with
Including being located at encapsulated layer 25 of the organic light-emitting units 22 far from 10 side of underlay substrate, encapsulated layer 25 covers driving circuit 21 and has
Machine luminescence unit 22.Encapsulated layer 25 includes the first packed part 251 and the second packed part 252, and the first packed part 251 is serving as a contrast
There are overlapping region, the second encapsulation for upright projection and upright projection of the driving circuit 21 on underlay substrate 20 on substrate 20
Part 252 exists in the upright projection of upright projection and organic light-emitting units 22 on underlay substrate 20 on underlay substrate 20 hands over
Folded region；Wherein, the first packed part 251 and the second packed part 252 are independently arranged；Or first packed part 251 and
Two packed parts 252 are wholely set.
Specifically, there is display effect after being corroded due to the organic luminous layer 222 in organic light-emitting units 22 by water oxygen
It is bad, therefore for organic light emitting display panel, it needs to set in organic light-emitting units 22 far from the side of underlay substrate 20
Set encapsulated layer 25.Specifically, encapsulated layer 25 can successively include the thin-film encapsulation layer of multilayer organic material and inorganic material, to having
Machine luminescence unit 22 carries out water oxygen protection.Further, due to organic hair each in display panel provided in an embodiment of the present invention
Light unit 22 is independently arranged, therefore encapsulated layer 25 forms package in all directions to each driving circuit 21 and organic light-emitting units 22 and seals
Dress forms similar " returning " font encapsulating structure, as shown in figure 5, greatly promoting the packaging effect of display panel, guarantees display surface
The water oxygen obstructing capacity of plate is strong.
Further, encapsulated layer 25 may include the first packed part 251 and the second packed part 252, the first encapsulation part
Points 251 in the upright projection on underlay substrate 20, there are crossover regions with upright projection of the driving circuit 21 on underlay substrate 20
Domain, the second packed part 252 is in upright projection and organic light-emitting units 22 the hanging down on underlay substrate 20 on underlay substrate 20
Delivering directly shadow, there are overlapping regions, wherein the first packed part 251 and the second packed part 252 can be wholely set, such as Fig. 3 and figure
Shown in 4；It can also be independently arranged, as shown in fig. 7, the embodiment of the present invention is to this without limiting.Optionally, when the first encapsulation part
Points 251 and second packed part 252 when being wholely set, 25 formation process of encapsulated layer is simple.Also, when the first packed part 251
When being wholely set with the second packed part 252, along the direction of vertical substrates substrate 20, the thickness L1 of the first packed part 251 with
The thickness L2 of second packed part 252 meets L1 > L2, and such first packed part 251 and the second packed part 252 can be formed
Structure similar to Figure 6, the first packed part 251 can form similar opaque encapsulation part since package thickness is larger
Point, it is equivalent to the effect of black matrix, so can reduce the light crosstalk between different organic light-emitting units 22, guarantees display surface
Plate display effect is good.Optionally, when the first packed part 251 and the second packed part 252 are independently arranged, the first encapsulation part
Points 251 and second packed part 252 can be using preparing respectively, such as can be when prepare the first packed part 251 by fitting
When doping guarantee the first packed part 251 be it is opaque, the first packed part 251 is equivalent to black matrix, reduces different organic
Light crosstalk between luminescence unit 22 guarantees that display panel display effect is good；The second packed part 252 can be simultaneously
All-transparent, as shown in fig. 6, guaranteeing that the light penetration of the second packed part 252 is high, display panel display effect is good.
Optionally, with continued reference to shown in Fig. 2, Fig. 3, Fig. 4 and Fig. 7, display panel provided in an embodiment of the present invention can be with
Conductive column 262 including multiple through-hole structures 261 and in through-hole structure 261；Cathode signal metal routing 23 and the second electricity
Pole 223 is electrically connected by conductive column 262.
Illustratively, different film layers are located at from second electrode 223 due to cathode signal metal routing 23, are realizing yin
Between pole signal metal cabling 23 and second electrode 223 when being electrically connected, need to be arranged through structure 261 and in through-hole structure
Conductive column 262 is set in 261, being electrically connected between cathode signal metal routing 23 and second electrode 223 is realized by conductive column 262
It connects.
Optionally, with continued reference to shown in Fig. 3, Fig. 4 and Fig. 7, upright projection of the conductive column 262 on underlay substrate 20 and the
Upright projection of one electrode 221 on underlay substrate 20 is staggered, and the cathode signal transmitted on conductive column 262 is avoided to conduct to first
Electrode 221, cause organic light-emitting units 22 can not normal luminous show.
It should be noted that as shown in Fig. 3, Fig. 4 and Fig. 7, since through-hole structure 261 is possible to through driving film crystal
The source electrode 2111 of pipe 211 perhaps drains 2112 in order to avoid conductive column 261 and source electrode 2111 or 2112 short circuit of drain electrode, in shape
At can first prepare a layer insulating (not shown) between conductive column 262 in through-hole structure 261, then in insulating layer
Prepare conductive column 262, so can both guarantee cathode signal by the conduction of conductive column 262 to second electrode 223, while can also be with
Conductive column 261 and source electrode 2111 or 2112 short circuit of drain electrode are avoided, guarantees that display panel is normally shown.
Based on same inventive concept, the embodiment of the invention also provides a kind of preparation methods of display panel, such as Fig. 8 institute
Show, the preparation method of display panel provided in an embodiment of the present invention may include:
S110, underlay substrate is provided.
Illustratively, underlay substrate can be rigid substrates or flexible base board, material of the embodiment of the present invention to underlay substrate
It is not construed as limiting.
S120, multiple driving circuits and multiple organic light-emitting units, organic hair are prepared in the underlay substrate side
Light unit includes the first electrode being independently arranged, organic luminous layer and second electrode, the driving circuit and the first electrode
It corresponds and is electrically connected.
Illustratively, the cathode of middle whole face setting is different from the prior art, display panel provided in an embodiment of the present invention
In preparation method, the first electrode being independently arranged, organic luminous layer and second electrode are prepared.Multiple second electrodes being independently arranged
It can be by etching to obtain multiple second electrodes being independently arranged again after first preparing the cathode electrode that whole face is arranged, be also possible to
Multiple second electrodes being independently arranged directly are prepared by mask process, the embodiment of the present invention is to this without limiting.
S130, a plurality of cathode signal metal routing, every cathode signal metal are prepared in the underlay substrate side
The second electrode of cabling and the multiple organic light-emitting units being arranged along the cathode signal metal routing extending direction is electrically connected
It connects.
Illustratively, the preparation method of display panel provided in an embodiment of the present invention, which is added, prepares a plurality of cathode signal metal
The step of cabling, transmission has cathode signal on every cathode signal metal routing, since the resistance of cathode signal metal routing is remote
Less than the resistance on metal oxide cathode, thus voltage drop very little of the cathode signal cabling on cathode signal metal routing or
Person can be ignored, and guarantee the second electrode for the multiple organic light-emitting units being arranged along cathode signal metal routing extending direction
On the cathode signal that receives is identical or difference very little, guarantee that display panel shows that homogeneity is good, it is aobvious greatly to improve OLED
The display effect of showing device simultaneously reduces electric energy loss.
To sum up, the preparation method of display panel provided in an embodiment of the present invention, by adding cathode signal metal routing
Preparation process, preparation cathode signal metal routing and multiple organic light emission lists along the setting of cathode signal metal routing extending direction
The second electrode electrical connection of member, since the resistance on cathode signal metal routing is much smaller than the resistance of metal oxide cathode, because
This transmits cathode signal to second electrode by cathode signal metal routing, reduces damage of the cathode signal in transmission process
Consumption guarantees that display panel shows that homogeneity is good；Meanwhile preparing each organic light-emitting units includes the first electricity being independently arranged
Pole, organic luminous layer and second electrode, each organic light-emitting units work independently, will not interfere with each other between each other, avoid because
There is a situation where obstacles to influence other organic light-emitting units for individual organic light-emitting units, guarantees that display panel has good stability.
Optionally, Fig. 9 is the preparation method of another display panel provided in an embodiment of the present invention, and Fig. 9 is with driving circuit
The preparation method of display panel is advanced optimized for underlay substrate side is set side by side with organic light-emitting units, such as
Shown in Fig. 9, the preparation method of display panel provided in an embodiment of the present invention may include:
S210, underlay substrate is provided.
S220, multiple driving circuits are prepared in the underlay substrate side, each driving circuit includes at least driving
Thin film transistor (TFT).
S230, multiple organic light-emitting units are prepared in the underlay substrate side, in plane where the underlay substrate
In parallel direction, the source electrode of the driving thin film transistor (TFT) or drain electrode and the first electrode of the organic light-emitting units are electrically connected
It connects.
S240, a plurality of cathode signal metal routing, every cathode signal metal are prepared in the underlay substrate side
The second electrode of cabling and the multiple organic light-emitting units being arranged along the cathode signal metal routing extending direction is electrically connected
It connects.
Illustratively, middle driving circuit 21 is different from the prior art to be arranged with 22 lamination of organic light-emitting units, the present invention is real
In the preparation method for applying the display panel of example offer, driving circuit 21 and organic light-emitting units 22 are in the same side of underlay substrate 20
Be set side by side, i.e., along any direction parallel with 20 place plane of underlay substrate, driving circuit 21 and organic light-emitting units 22 according to
Secondary setting so can reduce the thickness of display panel, realizes display panel slimming design, meets the lightening hair of display panel
Exhibition section domain；The light that driving circuit 21 will not stop organic light-emitting units 22 to issue simultaneously guarantees the hair that display panel can be improved
Light efficiency promotes the display effect of display panel.Further, middle organic light-emitting units 22 and driving are electric compared with the prior art
It needs to punch when road 21 is electrically connected and realizes electrical connection, complex process and the more demanding technical problem of aligning accuracy, setting driving
Circuit 21 and organic light-emitting units 22 are set side by side in the same side of underlay substrate 20, simple process, the preparation effect of display panel
Rate is high.
Next, using the driving thin film transistor (TFT) in driving circuit as bottom gate thin film transistor, cathode signal metal routing
For the setting of the grid same layer of bottom gate thin film transistor, a kind of preparation side of display panel in practical preparation process is discussed in detail
Method specifically can be such that
Underlay substrate is provided.
Bottom gate thin film crystalline substance is made on underlay substrate of the method for dry etching or wet etching or inkjet printing
The grid and cathode signal metal routing of body pipe.Grid and cathode signal metal routing may include plied timber, such as aluminium neodymium
With molybdenum (AlNd/Mo) and aluminium neodymium and nitrating molybdenum (AlNd/MoNx) etc., the embodiment of the present invention is to this without limiting.
Using SiNx: silicon nitride film, as gate insulating layer.
Using the method for dry etching or wet etching or inkjet printing, the active of bottom gate thin film transistor is prepared
Layer, active layer correspond to the position protrusion of grid, form the shape of a similar island.Active layer can be hydrogenated non-using a-Si:H
Polycrystal silicon film or n+a-Si are doped with the amorphous silicon membrane of phosphorus, and the embodiment of the present invention is to this without limiting.
The source/drain of bottom gate thin film transistor is prepared using the method for dry etching or wet etching or inkjet printing
Pole.The material that source/drain uses is typically all plied timber, such as Mo/Al/Mo, Mo/AlNd/Mo, MoNx/AlNi/MoNx
Deng, the embodiment of the present invention to this without limiting.
Using the method for dry etching or wet etching or inkjet printing prepare first electrode, first electrode directly with
Source/drain electrode contact.The material that first electrode uses is usually tin indium oxide (ITO), indium zinc oxide (IZO), Al (aluminium), Ag
(silver) etc., the embodiment of the present invention is to this without limiting.
Organic luminous layer is prepared using exposure mask vapor deposition or inkjet printing mode, organic hair in different organic light-emitting units
It is prepared by the method that photosphere can be translated with identical mask plate.
Second electrode, the material of second electrode are prepared using the method for dry etching or wet etching or inkjet printing
It can be tin indium oxide (ITO), indium zinc oxide (IZO), Al (aluminium), Ag (silver), the embodiment of the present invention is to this without limiting.
Through-hole structure and conductive column are prepared, wherein conductive column material includes one of Al (aluminium), Ag (silver), Au gold or more
Kind, the embodiment of the present invention is to this without limiting.
Encapsulated layer is made using exposure mask vapor deposition or inkjet printing, the material of encapsulated layer can be organic polymer and inorganic
Polymer complex uses.
Based on same inventive concept, the embodiment of the invention also provides a kind of display device, Figure 10 is implementation of the present invention
The schematic diagram for the display device that example provides, display device 100 provided in an embodiment of the present invention include any embodiment of that present invention institute
The display panel 101 stated.Optionally, it can be mobile phone shown in Fig. 10 that the embodiment of the present invention, which provides display device, or
Computer, television set, intelligence wearing display device etc., the embodiment of the present invention is not particularly limited this.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, and the feature of each embodiment of the invention can be partially or entirely
Ground is coupled to each other or combination, and coordination with one another and can technically be driven in various ways.To those skilled in the art
For be able to carry out and various apparent change, readjust, be combined with each other and substitute without departing from protection scope of the present invention.
Therefore, although the present invention has been described in more detail through the above examples, the present invention is not limited only to above
Embodiment can also include without departing from the inventive concept more other equivalent embodiments, and the scope of the present invention
It is determined by the scope of the appended claims.
Claims (10)
1. a kind of display panel, which is characterized in that multiple driving circuits including underlay substrate, positioned at the underlay substrate side
With multiple organic light-emitting units, the organic light-emitting units include the first electrode being independently arranged, organic luminous layer and the second electricity
Pole, the driving circuit are corresponded and are electrically connected with the first electrode；
The display panel further includes a plurality of cathode signal metal routing, every cathode signal metal routing with along the yin
The second electrode electrical connection of multiple organic light-emitting units of pole signal metal cabling extending direction setting.
2. display panel according to claim 1, which is characterized in that the driving circuit and the organic light-emitting units exist
The underlay substrate side is set side by side；
The driving circuit includes at least driving thin film transistor (TFT), where the underlay substrate in the parallel direction of plane, institute
The source electrode or drain electrode for stating driving thin film transistor (TFT) are electrically connected with the first electrode of the organic light-emitting units.
3. display panel according to claim 2, which is characterized in that the display panel further includes being located at organic hair
Encapsulated layer of the light unit far from the underlay substrate side, the encapsulated layer cover the driving circuit and the organic light emission list
Member；
The encapsulated layer includes the first packed part and the second packed part, and first packed part is on the underlay substrate
Upright projection there are overlapping region, second encapsulation parts with upright projection of the driving circuit on the underlay substrate
Point there are overlapping regions with upright projection of the organic luminescence display unit on the underlay substrate；
First packed part and second packed part are independently arranged；Or first packed part and described second
Packed part is wholely set.
4. display panel according to claim 2, which is characterized in that the driving circuit hanging down on the underlay substrate
The upright projection of shadow and the cathode signal cabling on the underlay substrate is delivered directly in the presence of overlapping.
5. display panel according to claim 4, which is characterized in that the driving thin film transistor (TFT) is top gate structure, institute
Stating driving thin film transistor (TFT) successively includes the active layer being stacked, gate insulation layer, grid, interlayer insulating film and source/drain；Or
Driving thin film transistor (TFT) described in person is bottom grating structure, and the driving thin film transistor (TFT) includes that the grid being cascading, grid are exhausted
Edge layer, active layer and source/drain；
The cathode signal metal routing and the grid same layer are arranged, and the gate insulation layer covers the grid and the cathode
Signal metal cabling.
6. display panel according to claim 5, which is characterized in that the display panel further includes being located at the substrate base
The multi-strip scanning line of plate side；
The scan line is arranged and is electrically connected with the grid same layer, the extending direction of the cathode signal metal routing with it is described
The extending direction of scan line is identical.
7. display panel according to claim 2, which is characterized in that the display panel further include multiple through-hole structures and
Conductive column in the through-hole structure；
The cathode signal metal routing is electrically connected with the second electrode by the conductive column.
8. display panel according to claim 7, which is characterized in that the conductive column is vertical on the underlay substrate
Projection is staggered with upright projection of the first electrode on the underlay substrate.
9. a kind of preparation method of display panel characterized by comprising
Underlay substrate is provided；
Multiple driving circuits and multiple organic light-emitting units are prepared in the underlay substrate side, the organic light-emitting units include
First electrode, organic luminous layer and the second electrode being independently arranged, the driving circuit and the first electrode correspond and
Electrical connection；
Prepare a plurality of cathode signal metal routing in the underlay substrate side, every cathode signal metal routing with along institute
State the second electrode electrical connection of multiple organic light-emitting units of cathode signal metal routing extending direction setting.
10. a kind of display device, which is characterized in that including the described in any item display panels of claim 1-8.
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