CN107153486A - A kind of foldable touch-screen in whole face and preparation method thereof, application - Google Patents
A kind of foldable touch-screen in whole face and preparation method thereof, application Download PDFInfo
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- CN107153486A CN107153486A CN201710413102.XA CN201710413102A CN107153486A CN 107153486 A CN107153486 A CN 107153486A CN 201710413102 A CN201710413102 A CN 201710413102A CN 107153486 A CN107153486 A CN 107153486A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
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Abstract
The invention discloses a kind of whole foldable touch-screen in face and preparation method thereof, application, wherein, the whole foldable touch-screen in face, including：Basilar memebrane；It is arranged on the ITO conductive layer of basement membrane surface, including viewfinder area, bending part and edge lead district；It is arranged on the graphene layer of ITO conductive layer bending part；It is arranged on ITO conductive layer edge lead district and the electrode with graphene layer overlapping part lead district.The present invention can both solve adhesion problem of the graphene film in touch sensing manufacturing process, ito thin film problem not resistant to bending in touch sensing manufacturing process can also be solved, to improve the service life and stability of foldable touch sensing, the intermembranous advantage of comprehensive two kinds of conductions, utilize graphene+ITO composite membranes, the ITO surfaces transfer part graphene in region, the bending resistance of enhancing bending region conductive layer are bent in touch-screen.
Description
Technical field
The present invention relates to a kind of Foldable display device display screen and preparation method thereof, and corresponding display device.
Background technology
Existing touch-screen uses ITO as conductive layer substantially, because ITO is not resistant to bending, can not more fold and use, thus
The ideal material that current display field can only show ITO as plane.But with the change that the display industry day row moon is different, plane
The size of display is increasing, very convenient when in use, but on taking and placing, it is inconvenient because screen is excessive,
Thus curved-surface display and Foldable display device turn into current popular research direction, and foldable device is ensureing user
Just while, taking and placement space for equipment can be effectively reduced, degree easy to use can be significantly improved, thus turns into what is generally acknowledged
Following display trend, the foldable of display device mainly includes two parts, the touch of the foldable and display screen surface of display screen
Screen is foldable, and the foldable research of display screen, including Samsung, LG are on the forefront, and have corresponding sample machine to emerge, and in people
Machine interacts most important interface --- on foldable touch-screen, realized at present still without good method it is foldable, wherein one
Big main cause is exactly that current touch-screen is essentially ITO making, and ITO is easily cracked injured, it is impossible to born more than 90 degree
It is interior to bending, and the export-oriented bending more than 30 degree can more make ITO cracking damages easily.
Foldable display device as patent No. CN105324807A/CN105810104A etc. is introduced is actual aobvious for two
Display screen, in same plane when using two display screens by middle bending device, can be folded in half when not in use, can be with
As foldable device, but actually simply by outside mechanical part formation folding effect, it is impossible to really realize whole screen
It is complete to fold.Complicated, the complex process of bending device is set in the middle of this needs, easily occurs believing between two display screens
Number short circuit problem, and service life is short.
Patent No. CN106373490 describes a kind of folding device, then can on the premise of not increasing other servicing units
To realize introversive and export-oriented 180 degree bending, but foldable touch-screen action character used in display device is not described.
To sum up, bent touch panel device technology is badly in need of improving.
The content of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to there is provided it is a kind of it is overall can bending touch-screen, this is touched
Touch screen it is simple in construction, be easily achieved；
It is a further object of the present invention to provide the preparation method of above-mentioned touch-screen；
It is yet another object of the invention to provide the application of above-mentioned touch-screen.
The purpose of the present invention is implemented by the following technical programs：
A kind of foldable touch-screen in whole face, including：
Basilar memebrane；
It is arranged on the ITO conductive layer of basement membrane surface, including viewfinder area, bending part and edge lead district；
It is arranged on the graphene layer of ITO conductive layer bending part；
It is arranged on ITO conductive layer edge lead district and the electrode with graphene layer overlapping part lead district on ITO conductive layer.
The whole foldable touch-screen in face of the present invention, is mutually combined closely in bending region graphene with ITO by Van der Waals force,
Solve ITO problems not resistant to bending.During bending, if ITO is broken, because the graphene on ITO surfaces will not break
Split, electronics changes from graphene layer transmission, it is ensured that the normal operation of whole passage.Through experiment test, between graphene and ITO not
Can occur obvious displacement (being generally less than 0.1 micron), actually touch-screen interchannel spacing is at least more than 20 microns, and 0.1 is micro-
The displacement of rice can be ignored, and therefore, the foldable touch-screen in face of the present invention can be with practical application.
Preferably, the graphene layer is single or multiple lift graphene film, preferred single layer graphene film.
Preferably, the gross thickness of the basilar memebrane and ITO conductive layer is 1-500 microns, for example：1 micron, 10 microns, 50
Micron, 100 microns, 150 microns, 200 microns, 250 microns, 300 microns, 350 microns, 400 microns, 450 microns, 500 microns,
Deng；It is preferred that 50 microns.
Further preferably, the thickness of the ITO conductive layer is 1-500 nanometers, for example：1 micron, 10 microns, 50 microns,
100 microns, 150 microns, 200 microns, 250 microns, 300 microns, 350 microns, 400 microns, 450 microns, 500 microns, etc.；It is excellent
Select 100 nanometers.
Preferably, the metal electrode uses ag paste electrode or copper electrode.
A kind of preparation method of the foldable touch-screen in whole face, including：
1) according to the profile of Foldable display device, corresponding touch-screen profile is designed, and mark fold domain；
2) fold domain is marked on the ITO conductive films with basilar memebrane；
3) graphene film is shifted in the fold domain of mark；
4) whole graphene layer+ITO conductive films are patterned, made as touch sensing metal lead wire region
Graphene is eliminated, while exposing ITO conductive films surface, metal lead wire is overlapped with ITO；
5) electrode is made, electrode is overlapped with ITO conductive films, complete touch control line is formed；
6) electrode and graphene overlay area and ITO regions are patterned respectively, forms touch sensing pattern
With surrounding metal lead.
Preferably, the transfer method of graphene film is preferably quiet using heat release adhesive tape transfer method or electrostatic transfer method
Electrotransfer method；Further preferably shift a layer graphene film.
Preferably, the Patternized technique uses write-through laser ablation method, gold-tinted method and acidproof etching method, preferably directly
Write formula laser ablation method.
Preferably, it is described to make the method that electrode uses the wet print of silver paste, in ITO overlapping edges region, metal electrode is set,
Lead line；It is further preferred that in the method for the wet print of silver paste, silver paste print thickness is 4-8 microns, silver paste baking condition is baking
Roasting mode or IR stove curing modes.
Preferably, laser direct-writing mode pattern is respectively adopted to ITO, ITO+ graphene and metal electrode of viewfinder area
Change, form the visible area and surrounding metal lead of patterning.
Preferably, ITO conductive layer and graphene layer surface fit optical cement, crimping FPC after with folding display
Module is fitted, and forms complete foldable and tangibly display device.
Beneficial effect of the present invention：
Present invention folding position (bending part) the need for folding ITO conductive layer shifts graphene, improves foldable
The folding stablizing effect of position, simply increases by one of graphene transfering process, you can produce in normal ITO touch-screens technique
Touch sensing with folding resistance.Because graphene has high transparency, low haze, high-flexibility, the height of graphene is utilized
Touch sensing resistant to bending can be made in pliability, and simply increases graphene layer in collapsible position,
While ensureing that ITO structure touch screen function is stable, increase the effect resistant to bending of touch sensing, can conduct
The touch sensing of foldable mobile phone or foldable panel etc..Graphene is bent through testing in continuous diverse location 180 degree, resistance
Rate of change is less than 1%；And interior curved cripping test is carried out with 1mm radiuses, bend 300,000 times, sample resistance varying-ratio is less than 3%.But
It is, graphene and metal electrode poor adhesive force.And the present invention simply allows graphene and ITO to overlap, graphene and gold are not allowed
Category walks line electrode overlap joint, and the problem of avoiding graphene adhesive force with cleverly structure has played the advantage of graphene bend-resistance,
Both adhesion problem of the graphene film in touch sensing manufacturing process can have been solved, ito thin film can also be solved and touched
Problem not resistant to bending during sensor production is controlled, it is comprehensive to improve the service life and stability of foldable touch sensing
The intermembranous advantage of two kinds of conductions, using graphene+ITO composite membranes, the ITO surfaces transfer part graphite in region is bent in touch-screen
Alkene, the bending resistance of enhancing bending region conductive layer.
Figure of description
Fig. 1 is a kind of appearance schematic diagram (embodiment 1,3) of Foldable display device of the present invention；
Fig. 2 is the appearance schematic diagram (embodiment 1,3) of the touch-screen of Fig. 1 Foldable display devices；
Fig. 3 is a kind of appearance schematic diagram of Foldable display device (embodiment 2,4)；
Fig. 4 is the appearance schematic diagram (embodiment 2,4) of the touch-screen of Fig. 3 Foldable display devices；
Fig. 5 is the whole foldable touch-screen process chart in face (embodiment 1,3) of the invention；
Fig. 6 is the whole foldable touch-screen process chart in face (embodiment 2,4) of the invention；
Fig. 7 is the structural representation of the whole foldable touch-screen in face of the invention；
Wherein, 1,3-foldable display module；2nd, 4-foldable touch module；5-ITO (tin indium oxide) conductive layer；
51-viewfinder area；52-bending part；53-edge lead district；6-PET base material；7-graphene conductive layer；8-plain conductor.
Embodiment
The preferred embodiments of the present invention are illustrated below in conjunction with accompanying drawing, it will be appreciated that preferred reality described herein
Apply example to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
The present invention proposes a kind of foldable touch-screen in whole face, as shown in fig. 7, comprises：
Basilar memebrane 6, typically using PET base material；
It is arranged on the ITO conductive layer 5 of basement membrane surface, including viewfinder area 51, bending part 52 and edge lead district 53；
It is arranged on the graphene layer 7 of ITO conductive layer bending part 52；
It is arranged on the electrode 8 of ITO conductive layer edge lead district 53.
In one embodiment of the invention, the graphene layer 7 is single-layer graphene film, in another embodiment, the stone
Black alkene layer multi-layer graphene film is constituted.In general, more preferably single-layer graphene film.Because single-layer graphene thickness is
It 0.34 nanometer, can be ignored relative to ITO thickness, obvious segment difference will not be produced.
In following examples, point-device explanation is carried out to basilar memebrane and ITO conductive layer, simply one kind is illustrated
It is bright, the several data gone out given in embodiment can not be defined in.The gross thickness of the basilar memebrane and ITO conductive layer is 1-500
Micron, for example：1 micron, 2 microns, 3 microns, 5 microns, 8 microns, 10 microns, 15 microns, 20 microns, 30 microns, 40 microns, 50
Micron, 60 microns, 70 microns, 90 microns, 100 microns, 130 microns, 150 microns, 160 microns, 200 microns, 220 microns, 250
Micron, 270 microns, 290 microns, 300 microns, 310 microns, 340 microns, 360 microns, 370 microns, 400 microns, 420 microns,
430 microns, 450 microns, 470 microns, 500 microns, etc.；It is preferred that 50 microns.Further, and under gross thickness, the ITO
The thickness of conductive layer is 1-500 nanometers, for example：1 nanometer, 2 nanometers, 3 nanometers, 5 nanometers, 8 nanometers, 10 nanometers, 15 nanometers, 20 receive
Rice, 30 nanometers, 40 nanometers, 50 nanometers, 60 nanometers, 70 nanometers, 90 nanometers, 100 nanometers, 130 nanometers, 150 nanometers, 160 nanometers,
200 nanometers, 220 nanometers, 250 nanometers, 270 nanometers, 290 nanometers, 300 nanometers, 310 nanometers, 340 nanometers, 360 nanometers, 370 receive
Rice, 400 nanometers, 420 nanometers, 430 nanometers, 450 nanometers, 470 nanometers, 500 nanometers, etc.；It is preferred that 100 nanometers.That is, this
In invention, the best of breed of basilar memebrane and ITO conductive layer is：The ITO of 50 microns of+100 nanometers of PET film.
In following examples, the metal electrode uses ag paste electrode or copper electrode.
Embodiment 1：
Corresponding touch-screen profile (such as Fig. 2) is designed according to the profile (such as Fig. 1) of Foldable display device and folding is marked
Folded region.
ITO+ graphene composite touches screen (whole face i.e. of the invention can bending touch-screen) technological process is following (such as Fig. 5)：
1) mark needs fold domain on ITO conductive films 25 microns thick；
2) single-layer graphene film is shifted in the fold domain of mark；
3) whole graphene+ITO conductive films are patterned by laser direct-writing technique, made as touch sensing
The graphene in metal lead wire region is eliminated, and exposes ITO conductive films surface, metal lead wire is overlapped with ITO；
4) silver paste wire is printed, silver paste is overlapped with ITO conductive films, complete touch control line is formed；
5) using laser direct-writing patterning to silver paste and other ITO and graphene overlay area pattern, form touch-control and pass
Sensor pattern and surrounding silver paste lead；
6) laminating optical cement, is fitted with folding display screen after cutting into small pieces, crimping FPC, is formed completely
Foldable display device (such as Fig. 1).
Embodiment 2：
Corresponding touch-screen profile (such as Fig. 4) is designed according to the profile (such as Fig. 3) of Foldable display device and folding is marked
Folded region.
The technological process of ITO+ graphene composite touch screens is following (such as Fig. 6)：
1) mark needs fold domain on ITO conductive films 50 microns thick；
2) bilayer graphene film is shifted in the fold domain of mark；
3) whole graphene+ITO conductive films are patterned by laser direct-writing technique, made as touch sensing
The graphene in metal lead wire region is eliminated, and exposes ITO conductive films surface, metal lead wire is overlapped with ITO；
4) silver paste wire is printed, silver paste is overlapped with ITO conductive films, complete touch control line is formed；
5) using laser direct-writing patterning to silver paste and other ITO and graphene overlay area pattern, form touch-control and pass
Sensor pattern and surrounding silver paste lead；
6) laminating optical cement, is fitted with folding display screen after cutting into small pieces, crimping FPC, is formed completely
Foldable display device (such as Fig. 3)
Embodiment 3：
Corresponding touch-screen profile (such as Fig. 2) is designed according to the profile (such as Fig. 1) of Foldable display device and folding is marked
Folded region.
The technological process of ITO+ graphene composite touch screens is following (such as Fig. 5)：
1) on ITO conductive films 25 microns thick mark need fold domain (corresponding is the bending part of ITO conductive layer,
It is as follows)；
2) single-layer graphene film is shifted in the fold domain of mark；
3) whole graphene+ITO conductive films are patterned by laser direct-writing technique, made as touch sensing
The graphene in metal lead wire region is eliminated, and exposes ITO conductive films surface, metal lead wire is overlapped with ITO；
4) sputter copper metal wire, makes copper cash be overlapped with ITO conductive films, forms complete touch control line；
5) using laser direct-writing patterning to copper cash and other ITO and graphene overlay area pattern, form touch-control and pass
Sensor pattern and surrounding silver paste lead；
6) laminating optical cement, is fitted with folding display screen after cutting into small pieces, crimping FPC, is formed completely
Foldable display device (such as Fig. 1).
Embodiment 4：
Corresponding touch-screen profile (such as Fig. 4) is designed according to the profile (such as Fig. 3) of Foldable display device and folding is marked
Folded region.
The technological process of ITO+ graphene composite touch screens is following (such as Fig. 6)：
1) mark needs fold domain on ITO conductive films 100 microns thick；
2) bilayer graphene film is shifted in the fold domain of mark；
3) whole graphene+ITO conductive films are patterned by laser direct-writing technique, made as touch sensing
The graphene in metal lead wire region is eliminated, and exposes ITO conductive films surface, metal lead wire is overlapped with ITO；
4) sputter copper metal wire, makes copper cash be overlapped with ITO conductive films, forms complete touch control line；
5) using laser direct-writing patterning to copper cash and other ITO and graphene overlay area pattern, form touch-control and pass
Sensor pattern and surrounding silver paste lead；
6) laminating optical cement, is fitted with folding display screen after cutting into small pieces, crimping FPC, is formed completely
Foldable display device (such as Fig. 3).
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, although with reference to foregoing reality
Apply example the present invention is described in detail, for those skilled in the art, it still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic.All essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (10)
1. a kind of foldable touch-screen in whole face, it is characterised in that：Including：
Basilar memebrane；
It is arranged on the ITO conductive layer of basement membrane surface, including viewfinder area, bending part and edge lead district；
It is arranged on the graphene layer of ITO conductive layer bending part.
It is arranged on ITO conductive layer edge lead district and the electrode with graphene layer overlapping part lead district.
2. the foldable touch-screen in whole face according to claim 1, it is characterised in that：The graphene layer is single or multiple lift
Graphene film, preferred single layer graphene film.
3. the foldable touch-screen in whole face according to claim 1, it is characterised in that：The basilar memebrane and ITO conductive layer
Gross thickness is 1-500 microns, preferably 50 microns；
Further preferably, the thickness of the ITO conductive layer is 1-500 nanometers, preferably 100 nanometers.
4. the foldable touch-screen in whole face according to claim 1, it is characterised in that：The metal electrode uses ag paste electrode
Or copper electrode.
5. a kind of preparation method of the foldable touch-screen in whole face, it is characterised in that：Including：
1) according to the profile of Foldable display device, corresponding touch-screen profile is designed, and mark fold domain；
2) fold domain is marked on the ITO conductive films with basilar memebrane；
3) graphene film is shifted in the fold domain of mark；
4) whole graphene layer+ITO conductive films are patterned, makes the graphite as touch sensing metal lead wire region
Alkene is eliminated, while exposing ITO conductive films surface, metal lead wire is overlapped with ITO；
5) electrode is made, electrode is overlapped with ITO conductive films, complete touch control line is formed；
6) electrode and graphene overlay area and ITO regions are patterned respectively, forms touch sensing pattern and week
Enclose metal lead wire.
6. the preparation method of the foldable touch-screen in whole face according to claim 5, it is characterised in that：The transfer of graphene film
Method is using heat release adhesive tape transfer method or electrostatic transfer method, preferably electrostatic transfer method；Further preferably shift one layer of graphite
Alkene film.
7. the preparation method of the foldable touch-screen in whole face according to claim 5, it is characterised in that：The Patternized technique is equal
Using write-through laser ablation method, gold-tinted method and acidproof etching method, preferred direct-write formula laser ablation method.
8. the preparation method of the foldable touch-screen in whole face according to claim 5, it is characterised in that：The making electrode is used
The method of the wet print of silver paste, metal electrode, lead line are set in ITO overlapping edges region；
It is preferred that, in the method for the wet print of silver paste, silver paste print thickness is 4-8 microns, and silver paste baking condition is roasting mode or IR
Stove curing mode.
9. the preparation method of the foldable touch-screen in whole face according to claim 5, it is characterised in that：ITO to viewfinder area,
ITO+ graphenes and metal electrode are respectively adopted laser direct-writing mode and patterned, and form the visible area and surrounding gold of patterning
Belong to lead.
10. the application of the foldable touch-screen in whole face according to claim 1, it is characterised in that：In ITO conductive layer and graphene
Fitted after the surface laminating optical cement of layer, crimping FPC with folding display module, form completely foldable and can touch
The display device touched.
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| CN110320943A (en) * | 2019-08-01 | 2019-10-11 | 江西艾芬达暖通科技股份有限公司 | A kind of modularization temperature controller using Folding screen |
| CN111506219A (en) * | 2020-04-21 | 2020-08-07 | 南昌欧菲显示科技有限公司 | Touch sensor and touch display device |
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| CN107153486B (en) | 2021-06-11 |
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Effective date of registration: 20190312 Address after: No. 518-5 Zhonghui Road, Standard Factory Building of Chang'an Industrial Park, Huishan Economic Development Zone, Wuxi City, Jiangsu Province, 214000 Applicant after: Wuxi Sixth Element Electronic Film Technology Co., Ltd. Address before: No. 518-5 Zhonghui Road, Standard Factory Building of Chang'an Industrial Park, Huishan Economic Development Zone, Wuxi City, Jiangsu Province, 214000 Applicant before: Wuxi Gefei Electronic Film Technology Co.,Ltd. |
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Address after: 213100 floor 1, building 4, No. 6, Xiangyun Road, West Taihu science and Technology Industrial Park, Changzhou City, Jiangsu Province Patentee after: Changzhou sixth element Semiconductor Co.,Ltd. Address before: No. 518-5 Zhonghui Road, Standard Factory Building of Chang'an Industrial Park, Huishan Economic Development Zone, Wuxi City, Jiangsu Province, 214000 Patentee before: WUXI SIXTH ELEMENT ELECTRONIC FILM TECHNOLOGY Co.,Ltd. |