CN106298798A - Flexible display device and manufacture method thereof - Google Patents
Flexible display device and manufacture method thereof Download PDFInfo
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- CN106298798A CN106298798A CN201510306518.2A CN201510306518A CN106298798A CN 106298798 A CN106298798 A CN 106298798A CN 201510306518 A CN201510306518 A CN 201510306518A CN 106298798 A CN106298798 A CN 106298798A
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Abstract
The invention provides a kind of flexible display device and manufacture method thereof, wherein, described flexible display device includes: flexible base board and the metal wire being arranged on described flexible base board；Wherein, the portion of described metal wire is arcuate line segment.In the flexible display device and manufacture method thereof of present invention offer, by the part line segment of metal wire is set to arcuate line segment, to improve the ability that described metal wire meets with stresses, thus extend the access times of described metal wire, improve the service life of described flexible display.Further, described arcuate line segment uses the height relief fabric and plane bending structure being arranged alternately, it is possible to reduces the risk of metal wire fracture further, improves the reliability of described flexible display device.
Description
Technical field
The present invention relates to display technology field, particularly to a kind of flexible display device and manufacture method thereof.
Background technology
Flexible display is that one is produced on flexible carrier (also referred to as flexible base board), changeable type or can
The display device of bending.Owing to flexible display has high lightness, resistance to impact, flexible taking property, can wear
Dai Xing, the feature such as easy to carry, be described as one of product of 21st century most future, the most increasingly
How paid close attention to by people.
At present, flexible display generally includes display floater and for driving the peripheral circuit of display floater, institute
State display floater and include that flexible base board, pel array and metal wire, described pel array and metal wire are respectively provided with
On described flexible base board, described peripheral circuit is by each picture of described metal wire with described pel array
Element unit realizes being electrically connected with, and described metal wire includes arranged in a crossed manner and separate grid line and data wire.
Flexible display needs to bend certain curvature radius in use, frequently even bends.Flexible display
The stress produced when deforming upon can put on metal wire, and metal wire can face the danger of fracture.Several
According to line and grid line, owing to its live width is the least, and length is the longest, has the length-width ratio of superelevation, therefore breaks
The probability split is bigger.Along with the increase of bending number of times, easily there is fracture or many places micro-force sensing in metal wire, leads
Cause flexible display cannot normally show.
In order to improve the reliability of flexible display and extend the service life of flexible display, industry would generally
Design and manufacture method to metal wire are improved.The Chinese patent Shen of Publication No. CN103700320A
Please, disclose one and hole is set over the metal lines to discharge stress, thus extend the service life of metal wire
Method.Specifically refer to Fig. 1, it is the structural representation of flexible display of prior art.Such as Fig. 1 institute
Showing, existing flexible display 10 includes: flexible base board (not shown) and be arranged at described flexible base
Metal wire on plate, described metal wire includes arranged in a crossed manner and separate data wire 1 and grid line 2, described
It is provided with pixel electrode 4 in the pixel cell 3 that data wire 1 and grid line 2 limit and switchs as pixel electrode
Thin film transistor (TFT) 5, described data wire 1 and/or grid line 2 are provided with hole 6.
When described flexible display 10 is when deforming upon, stress can be discharged by described hole 6.The party
Although method can extend the access times of metal wire, improve the service life of flexible display, but due to gold
The live width belonging to line is the least, and on the metal wire that this is the widest, punching has more problem, main table
Being now two aspects: on the one hand, the requirement for lithographic equipment is the highest, and technology difficulty is bigger；The opposing party
Face, punching can produce at punching over the metal lines, and the live width at edge can be than other at punching for described metal wire
The line width of position is a lot, and the most described metal wire is very easy to fracture occur at punching, affects device
Reliability.Further, it is well known that along with more and more higher to the demand of monitor resolution, the line of metal wire
Wide requirement is the most more and more narrow, punches on the narrowest metal wire, and its technical difficulty is the most increasing, it is achieved
Probability is more and more lower.
It addition, the Chinese patent application of Publication No. CN103928401A, disclose a kind of use Graphene or
Nano silver material makes transparency conducting layer and forms display screen substrate for array pixel electrode and the side of data wire
Method.Although the method can increase the access times of metal wire, the service life of prolonged display, but become
This is higher.
Summary of the invention
It is an object of the invention to provide a kind of flexible display device and manufacture method thereof, existing soft to solve
Property display poor reliability, the problem that manufacture difficulty is big or manufacturing cost is high.
For solving above-mentioned technical problem, the present invention provides a kind of flexible display device, described flexible display device
Including: flexible base board and the metal wire being arranged on described flexible base board；
Wherein, the part line segment of described metal wire is arcuate line segment.
Optionally, in described flexible display device, described metal wire includes some data line and some
Bar grid line, described some data line and some grid lines are arranged in a crossed manner and separate.
Optionally, in described flexible display device, described some data line and some grid lines are formed
Multiple crossover nodes, are provided with at least one the first arcuate line segment, extremely between each adjacent crossover node
Few second arcuate line segment and the straightway being connected with described first arcuate line segment and the second arcuate line segment；
The cross section of described straightway and longitudinal section are straight line, and the cross section of described first arcuate line segment is
One wave, the longitudinal section of described second arcuate line segment is the second wave.
Optionally, in described flexible display device, it is provided with a plurality of between each adjacent crossover node
First arcuate line segment and a plurality of second arcuate line segment, described first arcuate line segment and the second arcuate line segment alternately set
Put.
Optionally, in described flexible display device, described some data line and some grid lines are formed
Multiple crossover nodes, are provided with at least one arcuate line segment, described arc between each adjacent crossover node
Shape line segment is spiral helicine arcuate line segment.
Accordingly, the present invention also provides for the manufacture method of a kind of flexible display device, described flexible display device
Manufacture method include:
One flexible base board is provided；
Described flexible base board is formed a functional film layer；And
Described functional film layer forms metal wire, the cross section of partial line section or longitudinal section in described metal wire
For wave.
Optionally, in the manufacture method of described flexible display device, described functional film layer be organic layer or
Inorganic layer.
Optionally, in the manufacture method of described flexible display device, described organic layer has multiple arc
Bulge-structure, the plurality of arc convex structure is formed by exposure technology or inkjet printing.
Optionally, in the manufacture method of described flexible display device, described inorganic layer has multiple arc
Bulge-structure, the plurality of arc convex structure is by photoetching and etching technics or photoetching and to etch partially technique
Formed.
Optionally, in the manufacture method of described flexible display device, form metal in described functional film layer
The process of line includes:
A metal level is formed in described functional film layer by sputtering technology；
On described metal level, patterned photoresist layer is formed by photoetching process；And
Described metal level is performed etching with the photoresist layer of described figure case for mask, to form metal wire.
In the flexible display device and manufacture method thereof of embodiment of the present invention offer, by by the portion of metal wire
Separated time section is set to arcuate line segment, to improve the ability that described metal wire meets with stresses, thus extends described gold
Belong to the access times of line, improve the service life of described flexible display.Further, described curved line
Height relief fabric that Duan Caiyong is arranged alternately and plane bending structure, it is possible to reduce metal wire fracture further
Risk, improve the reliability of described flexible display device.
Accompanying drawing explanation
Fig. 1 is the structural representation of the flexible display of prior art；
Fig. 2 is the structural representation of the flexible display device of the embodiment of the present invention one；
Fig. 3 is the top view of the first arcuate line segment of the embodiment of the present invention one；
Fig. 4 is the sectional view of the second arcuate line segment of the embodiment of the present invention one；
Fig. 5 is the structural representation of the flexible display device of the embodiment of the present invention two.
Detailed description of the invention
The flexible display device proposed the present invention below in conjunction with the drawings and specific embodiments and manufacture method thereof are made
Further describe.According to following explanation and claims, advantages and features of the invention will be more clear
Chu.It should be noted that, accompanying drawing all uses the form simplified very much and all uses non-ratio accurately, only in order to
Conveniently, the purpose of the embodiment of the present invention is aided in illustrating lucidly.
[embodiment one]
Refer to Fig. 2, it is the structural representation of flexible display device of the embodiment of the present invention one.Such as Fig. 2 institute
Showing, described flexible display device 20 includes: flexible base board (not shown) and be arranged at described flexible base
Metal wire on plate, the part line segment of described metal wire is arcuate line segment.
Concrete, described metal wire includes arranged in a crossed manner and separate some data line 22 and some
Grid line 24, described some data line 22 and some grid lines 24 form multiple crossover node, each adjacent
Crossover node between be provided with at least one the first arcuate line segment 28a, at least one the second arcuate line segment
28b and the straightway 28c being connected with described first arcuate line segment 28a and the second arcuate line segment 28b, described
The cross section of straightway 28c and longitudinal section are straight line, and the cross section of described first arcuate line segment 28a is first
Wave, the longitudinal section of described second arcuate line segment 28b is the second wave.
Refer to Fig. 3, it is the top view of the first arcuate line segment of the embodiment of the present invention one.As it is shown on figure 3,
The part line segment of described metal wire is the first arcuate line segment 28a, and the cross section of described first arcuate line segment 28a is
First wave, the wavelength C1 (i.e. the length of a wave period) of described first wave and wave amplitude D1
Depending on (height of wave) can be with product design demand.Wherein, the knot of described first arcuate line segment 28a
Structure is the structure of plane bending, and described first arcuate line segment 28a and described straightway 28c are positioned at same level.
Refer to Fig. 4, it is the sectional view of the second arcuate line segment of the embodiment of the present invention one.As Fig. 4 shows, institute
The part line segment stating metal wire is the second arcuate line segment 28b, and the longitudinal section of described second arcuate line segment 28b is
Two waves, the wavelength C2 (i.e. the length of a wave period) of described second wave and wave amplitude D2 (ripple
Wave height) can be with product design demand depending on.Wherein, the structure of described second arcuate line segment 28b is
The structure that height rises and falls, the lowest part of described second arcuate line segment 28b is positioned at same with described straightway 28c
Horizontal plane.
The first arcuate line segment 28a and the second arcuate line segment 28b that arrange in described metal wire are able at horizontal stroke
Cross-wise direction and direction, longitudinal section meet with stresses, and therefore just can improve gold without arranging hole over the metal lines
Belong to the ability that line meets with stresses, thus extend the access times of described metal wire, improve described flexible display
The service life of 20.In the flexible display device 20 that the present embodiment provides, described metal wire includes data wire
22 and grid line 24 the most not easy fracture.
In the present embodiment, be provided with between each adjacent crossover node first arcuate line segment 28a, one
Second arcuate line segment 28b and straight with what described first arcuate line segment 28a and the second arcuate line segment 28b were connected
Line segment 28c.
In other embodiments, a plurality of first arcuate line segment can be set between each adjacent crossover node
28a and a plurality of second arcuate line segment 28b, be arranged at the first arcuate line segment between each adjacent crossover node
The bar number of 28a and the second arcuate line segment 28b, can be with product design demand depending on.
Such as, 2 the first arcuate line segment 28a and 2 second are set between each adjacent crossover node
Arcuate line segment 28b, 3 article of first arcuate line segment 28a and 2 article are set between each adjacent crossover node
Two arcuate line segment 28b, 3 the first arcuate line segment 28a and 3 are set between each adjacent crossover node
Second arcuate line segment 28b, 4 the first arcuate line segment 28a and 3 are set between each adjacent crossover node
Bar the second arcuate line segment 28b or 4 the first arcuate line segment 28a are set between each adjacent crossover node
With 4 the second arcuate line segment 28b etc..
Preferably, described first arcuate line segment 28a and the second arcuate line segment 28b are arranged alternately.
Described metal wire uses the structure that height rises and falls and plane bending alternates, it is possible to improves it further and holds
By the ability of stress, thus reduce the risk of metal wire fracture.
It is provided with one please continue to refer in the pixel cell 26 that Fig. 2, described data wire 22 and grid line 24 limit
Image element circuit, described image element circuit includes driving thin film transistor (TFT) M1, switching thin-film transistor M2, storage electricity
Hold Cs and Organic Light Emitting Diode OLED, the grid of described switching thin-film transistor M2 and described grid line 24
Connecting, the source electrode of described switching thin-film transistor M2 is connected with described data wire 22, and described driving thin film is brilliant
The grid of body pipe M1 is connected with the drain electrode of described switching thin-film transistor M2, and described storage electric capacity Cs is connected to
Between grid and the source electrode of described driving thin film transistor (TFT) M1, provide institute for maintaining during the scheduled time
State the data signal of the grid of switching thin-film transistor M2 and the threshold value electricity of described driving thin film transistor (TFT) M1
Pressure, the source electrode of described driving thin film transistor (TFT) M1 and the first power vd D connect, described driving thin film transistor (TFT)
The drain electrode of M1 is connected with the anode of described Organic Light Emitting Diode OLED, described Organic Light Emitting Diode OLED
Negative electrode be connected with second source VSS, described Organic Light Emitting Diode OLED provides according to described image element circuit
Electric current IOLEDAnd it is luminous.
When opening switching thin-film transistor M2 by described grid line 24, the data electricity that described data wire 22 provides
Press and store electric capacity Cs via switching thin-film transistor M2, thus control to drive thin film transistor (TFT) M1
Produce electric current, drive Organic Light Emitting Diode OLED luminous.
In the present embodiment, described image element circuit is for driving Organic Light Emitting Diode OLED to carry out luminescence,
Use 2T1C type and drive structure.In other embodiments of the invention, described image element circuit can use
Other drive structure, such as 6T1C type or 6T2C type to drive structure etc..
Accordingly, the present embodiment additionally provides the manufacture method of a kind of flexible display device.Please continue to refer to Fig. 2
To Fig. 4, the manufacture method of described flexible display device includes:
Step one a: flexible base board 21 is provided；
Step 2: form a functional film layer 23 on described flexible base board 21；
Step 3: forming metal wire in described functional film layer 23, in described metal wire, partial line section is transversal
Face or longitudinal section are arcuate line segment.
Concrete, first, it is provided that a flexible base board 21, described flexible base board 21 is formed with various film layer (figure
Not shown in) in order to realize different functions.In the present embodiment, described flexible base board 21 is plastic base.
In other embodiments, described flexible base board 21 can also use other flexible materials, such as resin or rubber
Glue etc., as long as described flexible base board 21 meets the requirement of pliability as the shell of flexible display.
Then, forming a functional film layer 23 on described flexible base board 21, described functional film layer 23 has many
Individual arc convex structure.Wherein, described functional film layer 23 is organic layer or inorganic layer, the arc of described organic layer
Shape bulge-structure is formed by exposure technology, inkjet printing or other modes, the arc of described inorganic layer
Bulge-structure is by photoetching and etching technics or photoetching and etches partially technique formation.
Then, forming metal wire in described functional film layer 23, described metal wire includes arranged in a crossed manner and mutual
Independent some data line 22 and some grid lines 24.
Wherein, the detailed process forming metal wire in described functional film layer 23 includes: first, by sputtering work
Skill forms a metal level in described functional film layer 23；Then, formed on described metal level by photoetching process
Patterned photoresist layer；Then, described metal level is carved by the photoresist layer with described figure case for mask
Erosion, to form metal wire.
Incorporated by reference to referring to figs. 2 and 3, etching formed metal wire in partial line section be the first arcuate line segment 28a,
The cross section of described first arcuate line segment 28a is wave, if the longitudinal section of described first arcuate line segment 28a is
Dry isolated point.
Incorporated by reference to reference to Fig. 2 and Fig. 4, the metal wire that etching is formed directly contacts with described organic layer or inorganic layer,
Owing to described organic layer or inorganic layer have multiple arc convex structure, the part line segment of described metal wire along with
Described arc convex structure occurs that height rises and falls, and forms the second arcuate line segment 28b, described second arcuate line segment
The longitudinal section of 28b is wave, and the cross section of described first arcuate line segment 28a is the point that several are isolated.
Wherein, described metal wire use existing ordinary metallic material, such as copper, tungsten, aluminum, molybdenum, titanium,
Molybdenum aluminum molybdenum or titanium aluminum titanium etc..Owing to described metal wire is required for special material, such as Graphene or nanometer silver
Material, therefore makes described metal wire essentially without increasing manufacturing cost.
As can be seen here, using the manufacture method of the flexible display device of the present embodiment offer, not only technique is simple,
And the access times of metal wire on the basis of not increasing manufacturing cost, can be extended, improve described flexibility
The service life of display 20.
[embodiment two]
Refer to Fig. 5, it is the structural representation of flexible display device of the embodiment of the present invention two.Such as Fig. 5 institute
Showing, described flexible display device 20 includes: flexible base board (not shown) and be arranged at described flexible base
Metal wire on plate, the part line segment of described metal wire is arcuate line segment.
Concrete, described metal wire includes arranged in a crossed manner and separate some data line 22 and some
Grid line 24, described some data line 22 and some grid lines 24 form multiple crossover node, each adjacent
Crossover node between be provided with at least one helical form arcuate line segment 28d.
The present embodiment is with embodiment one difference, and in described metal wire, arcuate line segment is shaped as spiral
Shape, described spiral helicine arcuate line segment all can meet with stresses in cross-sectional direction and direction, longitudinal section so that
Described metal wire not easy fracture, thus extend the access times of described metal wire.
It should be noted that quantity, shape and the position of above-mentioned spiral helicine arcuate line segment, it is only for example,
And non-limiting, those skilled in the art can be in conjunction with the actual demand quantity, shape and position to described arcuate line segment
Put.It addition, each embodiment uses the mode gone forward one by one to describe in this specification, each embodiment stresses
Be all the difference with other embodiments, between each embodiment, identical similar portion sees mutually.
To sum up, in the flexible display device and manufacture method thereof of embodiment of the present invention offer, by by metal
The part line segment of line is set to arcuate line segment, to improve the ability that described metal wire meets with stresses, thus extends
The access times of described metal wire, improve the service life of described flexible display.Further, described
Arcuate line segment uses the height relief fabric and plane bending being arranged alternately, it is possible to reduces metal wire further and breaks
The risk split, improves the reliability of described flexible display device.
Foregoing description is only the description to present pre-ferred embodiments, not any limit to the scope of the invention
Fixed, any change that the those of ordinary skill in field of the present invention does according to the disclosure above content, modification, all belong to
Protection domain in claims.
Claims (10)
1. a flexible display device, it is characterised in that including: flexible base board and be arranged at described flexible base
Metal wire on plate；
Wherein, the part line segment of described metal wire is arcuate line segment.
2. flexible display device as claimed in claim 1, it is characterised in that described metal wire includes some
Data line and some grid lines, described some data line and some grid lines are arranged in a crossed manner and separate.
3. flexible display device as claimed in claim 2, it is characterised in that described some data line and
Some grid lines form multiple crossover node, are provided with at least one the between each adjacent crossover node
One arcuate line segment, at least one the second arcuate line segment and with described first arcuate line segment and the second arcuate line segment
The straightway connected；
The cross section of described straightway and longitudinal section are straight line, and the cross section of described first arcuate line segment is
One wave, the longitudinal section of described second arcuate line segment is the second wave.
4. flexible display device as claimed in claim 3, it is characterised in that each adjacent crossover node
Between be provided with a plurality of first arcuate line segment and a plurality of second arcuate line segment, described first arcuate line segment and second
Arcuate line segment is arranged alternately.
5. flexible display device as claimed in claim 2, it is characterised in that described some data line and
Some grid lines form multiple crossover node, are provided with at least one arc between each adjacent crossover node
Shape line segment, described arcuate line segment is spiral helicine arcuate line segment.
6. the manufacture method of a flexible display device, it is characterised in that including:
One flexible base board is provided；
Described flexible base board is formed a functional film layer；And
Described functional film layer forms metal wire, the cross section of partial line section or longitudinal section in described metal wire
For wave.
7. the manufacture method of flexible display device as claimed in claim 6, it is characterised in that described function
Film layer is organic layer or inorganic layer.
8. the manufacture method of flexible display device as claimed in claim 7, it is characterised in that described organic
Layer has multiple arc convex structure, and the plurality of arc convex structure is by exposure technology or inkjet printing
Mode is formed.
9. the manufacture method of flexible display device as claimed in claim 7, it is characterised in that described inorganic
Layer has multiple arc convex structure, and the plurality of arc convex structure is by photoetching and etching technics or light
Carve and etch partially what technique was formed.
10. the manufacture method of flexible display device as claimed in claim 6, it is characterised in that described
Functional film layer forms the process of metal wire and includes:
A metal level is formed in described functional film layer by sputtering technology；
On described metal level, patterned photoresist layer is formed by photoetching process；And
Described metal level is performed etching with the photoresist layer of described figure case for mask, to form metal wire.
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| CN109037295A (en) * | 2018-08-03 | 2018-12-18 | 武汉华星光电半导体显示技术有限公司 | flexible array substrate and display panel |
| WO2020077751A1 (en) * | 2018-10-19 | 2020-04-23 | 武汉华星光电技术有限公司 | Flexible substrate, preparation method for flexible substrate, and display panel |
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| CN109493728A (en) * | 2018-12-13 | 2019-03-19 | 云谷（固安）科技有限公司 | A kind of display panel and display device |
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