CN109768052A - A kind of flexible display substrates, display device and preparation method thereof - Google Patents
A kind of flexible display substrates, display device and preparation method thereof Download PDFInfo
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- CN109768052A CN109768052A CN201910017379.XA CN201910017379A CN109768052A CN 109768052 A CN109768052 A CN 109768052A CN 201910017379 A CN201910017379 A CN 201910017379A CN 109768052 A CN109768052 A CN 109768052A
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Abstract
The present embodiments relate to field of display technology, disclose a kind of flexible display substrates, it include: flexible substrate, multiple pixel islands in flexible substrate and the metal routing layer being connect with pixel island, metal routing layer is set in flexible substrate, and metal routing layer includes main part and the interconnecting piece for connecting main part and pixel island；The metal thickness of interconnecting piece is greater than the metal thickness of main part.Embodiment of the present invention additionally provides the production method of a kind of flexible display apparatus and flexible display substrates.A kind of flexible display substrates that embodiment of the present invention provides, display base plate and preparation method thereof, so that pixel island and metal routing layer junction are not easy to break, to improve reliability when flexible display substrates stretch.
Description
Technical field
The present embodiments relate to field of display technology, in particular to a kind of flexible display substrates, display device and its system
Preparation Method.
Background technique
With the development of informationized society, display device for displaying images improves requirement.Recently, it has been developed
Various types of panel display apparatus, liquid crystal display device, plasma display device and electrophoretic display device, EDD etc..But
It is that traditional display device is all based on what the rigids such as glass were made, and the size and shape of display device is produced
It is fixed after coming, it is not able to satisfy the use of more occasions, complex environment.
The screen body of stretchable displayer part may be implemented the bending of certain angle and stretch without damaging, and be easily applied to
In various complicated, this makes the research of stretchable display technology more and more important.
Summary of the invention
Embodiment of the present invention is designed to provide a kind of flexible display substrates, so that pixel island and metal routing layer connect
Connect place it is not easy to break, thus improve flexible display substrates stretch when reliability.
In order to solve the above technical problems, embodiments of the present invention provide a kind of flexible display substrates, comprising: flexible liner
Bottom, multiple pixel islands in flexible substrate and the metal routing layer connecting with pixel island, metal routing layer is set to soft
Property substrate on, metal routing layer include main part and connect main part and pixel island interconnecting piece；The metal thickness of interconnecting piece
Greater than the metal thickness of main part.
Embodiments of the present invention additionally provide a kind of flexible display apparatus, including flexible display substrates as described above.
Embodiments of the present invention additionally provide a kind of preparation method of flexible display substrates, comprising: on flexible substrates
The metal routing layer for forming multiple pixel islands and being connect with pixel island；Wherein, metal routing layer is set in flexible substrate,
Metal routing layer includes main part and the interconnecting piece for connecting main part and pixel island；The metal thickness of interconnecting piece is greater than main body
The metal thickness in portion.
Embodiment of the present invention in terms of existing technologies, provides a kind of flexible display substrates, comprising: flexible liner
Bottom, multiple pixel islands in flexible substrate and the metal routing layer connecting with pixel island, metal routing layer is set to soft
Property substrate on, metal routing layer include main part and connect main part and pixel island interconnecting piece；The metal thickness of interconnecting piece
Greater than the metal thickness of main part.What the metal thickness by the way that metal routing layer to be connected to the interconnecting piece on pixel island was arranged is greater than gold
Belong to the metal thickness of routing layer main part, so that the stress ability to bear of metal routing layer interconnecting piece is improved, so that flexible aobvious
Show substrate in stretching or bending, the coupling part that metal routing layer connects pixel island is not easy to break, to improve flexible aobvious
Show reliability when substrate is stretched or is bent.
In addition, metal routing layer includes setting the first routing layer on flexible substrates, is arranged above the first routing layer
And the second routing layer of the partial region of the first routing layer of face, interconnecting piece include the second routing layer and the second routing layer face
The first routing layer partial region, main part includes other regions of the first routing layer.By metal routing layer in the program
Interconnecting piece is set as two-layer wiring structure, is applied to the connection that metal routing layer connects pixel island by two-layer wiring structure disperses
Partial stress, to improve the stress endurance of metal routing layer.
In addition, the second routing layer is laid on the surface of the first routing layer.The second routing layer is laid immediately in the program
Above one routing layer, while dispersive stress, among wherein any one layer of routing layer when fracture, metal routing layer still may be used
To be connected by other one layer of routing layer, to enhance the reliability of metal routing layer.
In addition, being equipped with the first insulating layer above the first routing layer, through-hole is formed on the first insulating layer；Second routing layer
It is layed on the first insulating layer and passes through through-hole and be electrically connected with the first routing layer, the second routing layer is electrically connected with the first routing layer
Part formed contact portion, the second routing layer deviate through-hole part formed flat part.It, can enhancing metal routing in the program
While by property, since the flat part of the second routing layer is laid on the first insulating layer, the contact portion energy of the second routing layer
Flat part of enough stress transfers for bearing the first routing layer to laying on the first insulating layer, and then answered by flat part release
Power, so that the coupling part on metal routing layer connection pixel island is not easy to break.
In addition, being equipped with the first insulating layer above the first routing layer, the second routing layer is laid on the insulating layer.In the program
Stress is discharged by the removing of the second routing layer and the removing of the first insulating layer.
In addition, the first insulating layer is fabricated from a flexible material.The first insulating layer is made of flexible insulating material in the program, shows
When showing that substrate bends or stretches, insulating layer is not easy to crack, and can disperse to make to improve in metal routing layer overall structure
Stress ability to bear is used in the stress of the coupling part on metal routing layer connection pixel island,.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not constituted to embodiment, the element in attached drawing with same reference numbers label are expressed as similar element, remove
Non- to have special statement, composition does not limit the figure in attached drawing.
Fig. 1 is the structural schematic diagram that the pixel island of first embodiment according to the present invention is connect with metal routing layer；
Fig. 2 is the schematic cross-section of the length direction of the metal routing layer of first embodiment according to the present invention；
Fig. 3 is the coupling part width direction on the metal routing layer connection pixel island of second embodiment according to the present invention
Schematic cross-section；
Fig. 4 is a kind of interconnecting piece on interchangeable metal routing layer connection pixel island of second embodiment according to the present invention
Divide the schematic cross-section of width direction；
Fig. 5 is the connection on the another kind interchangeable metal routing layer connection pixel island of second embodiment according to the present invention
The schematic cross-section in partial width direction；
Fig. 6 is the flow diagram of the preparation method of the flexible display substrates of the 4th embodiment according to the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Each embodiment be explained in detail.However, it will be understood by those skilled in the art that in each embodiment party of the present invention
In formula, in order to make the reader understand this application better, many technical details are proposed.But even if without these technical details
And various changes and modifications based on the following respective embodiments, the application technical solution claimed also may be implemented.
So-called pixel island refers to non-stretchable device portions when flexible display substrates stretch display.In order to protect device,
The position of device is usually set as an entirety, so being referred to as " pixel island ".Metal routing layer uses single layer in the prior art
Conductor structure, display base plate coupling part on metal routing layer connection pixel island in stretching or bending is easily broken off, so that aobvious
Show that the reliability of substrate reduces.
The first embodiment of the present invention is related to a kind of flexible display substrates, as depicted in figs. 1 and 2, comprising: flexible substrate
1, multiple pixel islands 2 in flexible substrate 1 and the metal routing layer 3 connecting with pixel island 2, metal routing layer 3 are arranged
In in flexible substrate 1, metal routing layer 3 includes main part 301 and the interconnecting piece 302 for connecting main part 301 and pixel island 2；
The metal thickness of interconnecting piece 302 is greater than the metal thickness of main part 301.
Specifically, the metal thickness that metal routing layer 3 is connected to the interconnecting piece 302 on pixel island 2 in present embodiment is set
The metal thickness for the main part 301 greater than metal routing layer 3 set, to improve answering for the interconnecting piece 302 of metal routing layer 3
Power ability to bear, so that flexible display substrates, in stretching or bending, metal routing layer 3 connects the coupling part on pixel island 2 not
Easy fracture, to improve reliability when flexible display substrates are stretched or are bent.
Further, metal routing layer 3 is made of metal material such as titanium Ti, aluminium Al etc. in present embodiment.Metal is walked
The main part 31 of line layer 3 may be configured as curved shape, such as the shape of a hoof, waveform.Optionally, the main part of metal routing layer 3
31 may be configured as fold-line-shaped structure, such as zigzag, and details are not described herein.Since the tensility of plain conductor is led not as good as flexibility
Line if being set to rectilinear structure will affect the integrally stretching performance of flexible display substrates, therefore can be set to song
Linear structure or fold-line-shaped structure, can improve the tensile property of plain conductor, with the guarantee when flexible display substrates are bent
Effective connection of route.
It is worth noting that so-called pixel island 2 includes pixel group, i.e., with several sub-pixels for a group, adjacent picture
Signal communication between plain group can be realized by means of metal routing layer 3.It wherein, may include one in each pixel island 2
A or multiple sub-pixels, the present embodiment are not especially limited this.Also set up in pixel island 2 equipped with thin film transistor (TFT) and with this
The signal wire, such as scan signal line, data signal line, and/or power signal line etc. of thin film transistor (TFT) electrical connection.And metal is walked
Line layer 3 then connects the uniformity signal line on two neighboring pixel island 2, and metal routing layer 3 may include: by adjacent pixel island
First metal routing layer of 2 scan signal line electrical connection, the second metal for being electrically connected the data signal line on adjacent pixel island 2
Routing layer, and/or the third metal routing layer etc. for being electrically connected the power signal line on adjacent pixel island 2.In the present embodiment
Pixel group, thin film transistor (TFT) and signal wire are not shown.
In the present embodiment, the pixel unit in pixel island 2 for display is Organic Light Emitting Diode (Organic
Light-Emitting Diode, OLED), it is to be understood that it is only this reality that the pixel unit in pixel island 2, which is OLED device,
It applies one of mode specifically to limit for example, not constituting, it is first to be also possible to other displays that can be used for showing
Part.
Compared with prior art, embodiment of the present invention provides a kind of flexible display substrates, by by metal routing layer 3
The metal thickness for connecting the main part 301 greater than metal routing layer 3 of the metal thickness setting of the interconnecting piece 302 on pixel island 2, from
And the stress ability to bear of the interconnecting piece 302 of metal routing layer 3 is improved, so that flexible display substrates are in stretching or bending,
The coupling part that metal routing layer 3 connects pixel island 2 is not easy to break, to improve when flexible display substrates are stretched or are bent
Reliability.
Second embodiment of the present invention is related to a kind of flexible display substrates.As shown in Fig. 3, Fig. 4 and Fig. 5, second implements
Mode is the improvement to first embodiment, is mainly theed improvement is that, in the present embodiment, metal routing layer 3 includes setting
It sets the first routing layer 31 in flexible substrate 1, the simultaneously part of the first routing layer of face 31 is set above the first routing layer 31
Second routing layer 32 in region, interconnecting piece 302 include the first routing layer of 32 face of the second routing layer 32 and the second routing layer
31 partial region, main part 301 include other regions of the first routing layer 31.
Specifically, setting two-layer wiring structure for the interconnecting piece 302 of metal routing layer 3 in present embodiment, pass through
Two-layer wiring structure disperses are applied to the stress that metal routing layer 3 connects the coupling part on pixel island 2, to improve metal routing
The stress endurance of layer 3.
Further, a kind of structural style of metal routing layer 3 is given in present embodiment, the second routing layer 32 is flat
It is laid on the top of the first routing layer 31.Metal routing layer 3 comprising such structure connects the coupling part on pixel island 2, wide
The schematic cross-section in direction is spent as shown in figure 3, the lower surface of the second routing layer 32 is bonded simultaneously with the upper surface of the first routing layer 31
It conducts, the second routing layer 32 is while peptizaiton is to the first 31 upper stress of routing layer, if wherein any one layer of routing layer
Centre fracture, metal routing layer 3 still can be connected by other one layer of routing layer, so that enhance metal routing layer 3 can
By property.
It should be noted that the second routing layer 32 provided in Fig. 3 is equal with the width of the first routing layer 31, but in reality
In, the width of the second routing layer 32 can be relatively narrow compared with the setting of the width of the first routing layer 31, and the second routing layer 32 is set to
The middle position of first routing layer, 31 upper surface, the ability that the second relatively narrow routing layer 32 meets with stresses is stronger, is less susceptible to out
It splits.
Optionally, a kind of structural style of interchangeable metal routing layer 3 is given in present embodiment.First routing layer
31 tops are equipped with the first insulating layer 41, are formed with through-hole 5 on the first insulating layer 41；Second routing layer 32 is layed in the first insulation
It is electrically connected on layer 41 and across through-hole 5 with the first routing layer 31, the part that the second routing layer 32 is electrically connected with the first routing layer 31
Contact portion 321 is formed, the part that the second routing layer 32 deviates through-hole 5 forms flat part 322.Metal routing comprising such structure
Layer 3 connects the coupling part on pixel island 2, and the schematic cross-section of width direction is as shown in Figure 4.Inventors have found that the second cabling
Layer 32 is only electrically connected by contact portion 321 with the first routing layer 31, under stress, contact portion 321 and the first routing layer 31
Removing, thus alleviate stress, but this does not influence the conduction status on pixel island but, thus improves in metal routing layer overall structure
Stress ability to bear.
Optionally, the structural style of another alternatively metal routing layer 3 is given in present embodiment.First walks
31 sides are equipped with the first insulating layer 41 on line layer, and the second routing layer 32 is laid on insulating layer 41.Metal comprising such structure
Routing layer 3 connects the coupling part on pixel island 2, and the schematic cross-section of width direction is as shown in figure 5, conductor layer No.1 31 and the
Two conductor layers 32 are not turned on, to discharge stress by the removing of the second routing layer 32 and the removing of the first insulating layer 41.
(do not show in figure it is worth noting that being equipped with second insulating layer above the second routing layer 32 in present embodiment
Out), the second routing layer is fabricated from a flexible material.Further disperse the stress being transmitted on the second routing layer 32, enhancing metal is walked
The integrally-built stress ability to bear of line layer 3.
Preferably, the first insulating layer 41 is fabricated from a flexible material in present embodiment, the first insulating layer in present embodiment
41 are made of flexible insulating material, and when flexible display substrates bend or stretch, the first insulating layer 41 is not easy to crack, and can
Stress of the peptizaiton on metal routing layer 3 improves the stress ability to bear in 3 overall structure of metal routing layer.
Compared with prior art, a kind of flexible display substrates are provided in embodiment of the present invention, the second routing layer 32 is
It is laid on the flat conductive layer on 312 surface of interconnecting piece of the first routing layer 31, gives a kind of structure sample of second routing layer 32
Formula.
Third embodiment of the present invention is related to a kind of flexible display apparatus, comprising: in fact such as first embodiment or second
Apply the flexible display substrates in mode.
Four embodiment of the invention is related to a kind of preparation method of flexible display substrates, and the flexibility in present embodiment is aobvious
Show the preparation method of substrate as shown in fig. 6, specifically including:
Step 401: flexible substrate is provided.
Specifically, flexible substrate 11 can be by acid imide (PI), polycarbonate (PC), polyether sulfone (PES), poly- terephthaldehyde
Sour glycol ester (PET), polyethylene naphthalate (PEN), polyarylate (PAR) or fiberglass reinforced plastics
(FRP) etc. polymer materials are formed.Flexible substrates 11 can be transparent, translucent or opaque.
Step 402: forming multiple pixel islands on flexible substrates and connect the metal routing layer on pixel island.
Specifically, wherein metal routing layer is set in flexible substrate, and metal routing layer includes main part, Yi Jilian
Connect the interconnecting piece of main part Yu pixel island；The metal thickness of interconnecting piece is greater than the metal thickness of main part.Metal routing layer can be with
For such as metal materials such as titanium Ti, aluminium Al.By being greater than for the metal thickness setting of the interconnecting piece on metal routing layer connection pixel island
The metal thickness of the main part of metal routing layer, so that the stress ability to bear of the interconnecting piece of metal routing layer is improved, so that
For flexible display substrates in stretching or bending, the coupling part that metal routing layer connects pixel island is not easy to break, to improve
Reliability when flexible display substrates are stretched or are bent.
Further, it is formed above the first routing layer before the second routing layer, can also include, on the first routing layer
It is rectangular at the first insulating layer, deposit the second routing layer on the first insulating layer later.Significantly, since metal routing layer
Interconnecting piece some be made on pixel island, i.e. the first routing layer and the second routing layer some be also to be made in pixel island
On, it is therefore, practical in depositing insulating layer on the first routing layer, the insulating layer of deposition also some be made on pixel island.But
When making other film layers on pixel island, in order to guarantee the normal connection of other film layers and conductor layer, generally require pixel island
After partial insulator layer etch falls, then make other film layers.It is of course also possible to organic on the second routing layer making at the beginning
When layer, divide depositing insulating layer using mask plate to avoid in pixel island portion.
Compared with prior art, the preparation method of the flexible display substrates provided in present embodiment, comprising: in flexible liner
The metal routing layer for forming multiple pixel islands on bottom and being connect with pixel island；Wherein, metal routing layer is set to flexible substrate
On, metal routing layer includes main part and the interconnecting piece for connecting main part and pixel island；The metal thickness of interconnecting piece is greater than master
The metal thickness in body portion.What the metal thickness by the way that metal routing layer to be connected to the interconnecting piece on pixel island was arranged is greater than metal routing
The metal thickness of the main part of layer, so that the stress ability to bear of the interconnecting piece of metal routing layer is improved, so that Flexible Displays
For substrate in stretching or bending, the coupling part that metal routing layer connects pixel island is not easy to break, to improve Flexible Displays
Reliability when substrate is stretched or is bent.
It should be noted that above embodiment is method embodiment party corresponding with the embodiment of flexible display substrates
Formula, therefore, the realization details in first embodiment and second embodiment can be applied in present embodiment.
It will be understood by those skilled in the art that the respective embodiments described above are to realize specific embodiments of the present invention,
And in practical applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (10)
1. a kind of flexible display substrates characterized by comprising flexible substrate, multiple pixels in the flexible substrate
Island and the metal routing layer being connect with the pixel island；
The metal routing layer is set in the flexible substrate, and the metal routing layer includes described in main part and connection
The interconnecting piece of main part and the pixel island；The metal thickness of the interconnecting piece is greater than the metal thickness of the main part.
2. flexible display substrates according to claim 1, which is characterized in that the metal routing layer includes being arranged described
The first routing layer in flexible substrate is arranged in above first routing layer and the partial region of the first routing layer described in face
The second routing layer, the interconnecting piece includes first cabling of second routing layer and the second routing layer face
The partial region of layer, the main part includes other regions of first routing layer.
3. flexible display substrates according to claim 2, which is characterized in that second routing layer is laid on described first
The surface of routing layer.
4. flexible display substrates according to claim 2, which is characterized in that be equipped with first above first routing layer
Insulating layer is formed with through-hole on first insulating layer；
Second routing layer is layed on first insulating layer and passes through the through-hole and is electrically connected with first routing layer
It connects, the part that second routing layer is electrically connected with first routing layer forms contact portion, and second routing layer deviates institute
The part for stating through-hole forms flat part.
5. flexible display substrates according to claim 2, which is characterized in that be equipped with first above first routing layer
Insulating layer, second routing layer are laid on the insulating layer.
6. flexible display substrates according to any one of claim 3 to 5, which is characterized in that first insulating layer by
Flexible material is made.
7. flexible display substrates according to claim 2, which is characterized in that be equipped with second above second routing layer
Insulating layer, the second insulating layer are fabricated from a flexible material.
8. flexible display substrates according to claim 1, which is characterized in that the main part is curved shape.
9. a kind of flexible display apparatus, which is characterized in that including Flexible Displays base such as described in any item of the claim 1 to 8
Plate.
10. a kind of preparation method of flexible display substrates characterized by comprising formed on flexible substrates multiple pixel islands,
And the metal routing layer being connect with the pixel island；Wherein, the metal routing layer is set in the flexible substrate, described
Metal routing layer includes the interconnecting piece of main part and the connection main part and the pixel island；The metal of the interconnecting piece
Thickness is greater than the metal thickness of the main part.
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| CN114171665A (en) * | 2021-12-09 | 2022-03-11 | 惠州华星光电显示有限公司 | Display panel and preparation method thereof |
| CN114220831A (en) * | 2021-12-10 | 2022-03-22 | 武汉华星光电半导体显示技术有限公司 | Stretchable display panel and method of manufacturing the same |
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