CN110471563B - Touch panel, display device and preparation method of touch panel - Google Patents
Touch panel, display device and preparation method of touch panel Download PDFInfo
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- CN110471563B CN110471563B CN201910699875.8A CN201910699875A CN110471563B CN 110471563 B CN110471563 B CN 110471563B CN 201910699875 A CN201910699875 A CN 201910699875A CN 110471563 B CN110471563 B CN 110471563B
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- 238000002360 preparation method Methods 0.000 title abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 53
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 46
- 239000000758 substrate Substances 0.000 claims description 21
- 238000004806 packaging method and process Methods 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 5
- 239000010409 thin film Substances 0.000 claims description 5
- 238000005538 encapsulation Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 9
- 239000010410 layer Substances 0.000 description 83
- 239000010408 film Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 125000000524 functional group Chemical group 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 230000003071 parasitic effect Effects 0.000 description 3
- 238000005240 physical vapour deposition Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000002042 Silver nanowire Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Classifications
-
- 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
- G06F3/0412—Digitisers structurally integrated in a display
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention provides a touch panel, a display device and a preparation method thereof, wherein a powerful combined structure is formed by combining a touch electrode and a graphene material, and the touch electrode is electrically connected with a first touch electrode or a second touch electrode by using the graphene material to form a touch circuit so as to improve the connection reliability of the touch electrode in the display device and improve the bending resistance of the display device.
Description
Technical Field
The invention relates to the technical field of display, in particular to a touch panel, a display device and a preparation method thereof.
Background
The progress of display technology has prompted the progress of display devices toward diversification, and full-screen display devices and flexible display devices are becoming the main stream of display device development. The flexible display device breaks through the limitation that the appearance of the traditional display device cannot be changed, so that the display device has higher flexibility and diversity, and the flexible display device is focused by a plurality of researchers in the technical field of display. The flexible touch display device manufactured by combining the flexible display device with the touch display technology provides more development possibility for the display touch device such as handheld equipment, display equipment and the like, and is expected to become one of the technologies for bringing great change to the display technology field.
The flexible touch display device generally uses a metal grid with light weight and good conductivity to replace a conductive electrode (ITO) material with poor bending performance, and the metal grid is directly prepared on a packaging layer of the flexible display panel so as to be used for forming a touch circuit, reduce the thickness of the original touch panel and transparent optical adhesive, make the flexible touch display device lighter and thinner and be more beneficial to folding.
However, it is difficult to achieve excellent performance of the product in terms of reliability performance, regardless of the material excellent in performance such as silver nanowire (AgNW) or Ti/Al/Ti. In particular, poor mechanical reliability that occurs in flexible panels with bendable or foldable features is one of the main factors that hamper the mass production of such products. In addition, after continuous bending for a plurality of times, material cracking can occur, and then the failure speed of the product can be accelerated; this phenomenon is particularly obvious at the joint of the metal grids of the display touch layer, and after being bent for a plurality of times, the touch circuit can be damaged, even the touch circuit loses the touch function.
Disclosure of Invention
The invention provides a touch panel, a display device and a preparation method thereof, wherein a graphene material is used for electrically connecting a lap joint electrode and a touch electrode, so that the technical problems that the reliability of the existing display device at a metal grid connection position is low, product failure is easy to cause, and the reliability performance of the display device is influenced are solved.
In order to solve the problems, the technical scheme provided by the invention is as follows:
the invention provides a touch panel which comprises a substrate, a first touch electrode and a second touch electrode, wherein the first touch electrode and the second touch electrode are arranged on the substrate, are prepared in the same layer and are arranged in a crossed insulation mode;
the touch control device further comprises a lap electrode, wherein the lap electrode is positioned on any side of the first touch control electrode and the second touch control electrode, and is electrically connected with the first touch control electrode or the second touch control electrode at the same intersection point;
the touch panel comprises a touch electrode, a first touch electrode, a second touch electrode, a touch electrode and a touch electrode, wherein a graphene material is arranged between the touch electrode and the touch electrode as a conductive medium, so that the touch electrode is electrically connected with the touch electrode, an oxygen-containing functional group on the surface of the graphene material and PVP on the surface of the touch electrode form a chemical bond, a powerful combined structure is obtained, the problem of poor reliability of a contact surface during frequent bending can be effectively resisted, and the reliability of the touch panel is improved.
According to a preferred embodiment of the present invention, interlayer insulation is achieved between the overlap electrode and the first touch electrode or the second touch electrode through an insulation layer, a through hole is provided on the insulation layer, the overlap electrode is connected with the first touch electrode or the second touch electrode through the through hole, graphene materials are filled in the through hole, the bottom of the graphene materials is electrically connected with the overlap electrode, and the top of the graphene materials is electrically connected with the first touch electrode or the second touch electrode. The insulating layer is a flexible inorganic film material and comprises SiN and SiON.
Because the overlap electrode is connected with the first touch electrode or the second touch electrode through the through hole, the vertical distance between the overlap electrode and the first touch electrode or the second electrode is shorter, and less graphene material needs to be filled. In addition, since parasitic inductance exists after the through hole is prepared, the parasitic inductance increases along with the length of the through hole, so that the distance of the through hole is shortest, the generated parasitic inductance is smallest, and the influence on the display device is smallest, and therefore, the through hole is preferably perpendicular to the positions of the lap joint electrode and the first touch electrode or the second touch electrode.
According to a preferred embodiment of the present invention, the overlap electrode, the first touch electrode and the second touch electrode are patterned electrodes, the shapes are not limited to grid shapes, but diamond shapes, square shapes or other shapes, the patterned preparation method includes but is not limited to physical vapor deposition and chemical vapor deposition, and the overlap electrode and the first touch electrode or the second touch electrode are made of metal materials with good bending performance, including Ti/Al/Ti and AgNW.
According to a preferred embodiment of the present invention, an inorganic insulating layer is disposed on a side of the overlap electrode away from the first touch electrode and the second touch electrode, and the inorganic insulating layer is a flexible inorganic thin film material, including SiN and SiON.
According to a preferred embodiment of the present invention, a flat layer is disposed on a side of the first touch electrode and the second touch electrode away from the overlap electrode, so as to ensure flatness of each film layer disposed on the flat layer.
The invention discloses a display device which comprises an array substrate, a light emitting device, a packaging layer, the touch panel and a polaroid which are arranged in a stacked mode.
The touch panel is arranged between the packaging layer and the polaroid, the inorganic insulating layer of the touch panel covers the packaging layer, and the polaroid is attached to the flat layer of the touch panel.
According to a preferred embodiment of the present invention, the overlap electrode, the first touch electrode and the second touch electrode are patterned electrodes, and are stacked in a bending area and a non-bending area of the display device, and at the same intersection, the overlap electrode is electrically connected with the first touch electrode or the second touch electrode through a graphene material, so as to realize a function of a touch circuit. When a finger touches the display device, a potential difference is generated between the overlap electrode and the first touch electrode or the second touch electrode, and the display device detects a touch position and generates feedback according to the detected potential difference, so that a touch function is realized.
The light emitting device may be an organic light emitting diode comprising an anode, a light emitting layer, a cathode, and one or more layers of a hole transporting layer, a hole injecting layer, an electron transporting layer, and an electron injecting layer.
The array substrate at least comprises a substrate and an array device layer, wherein the substrate can be a glass substrate or a flexible substrate.
The packaging layer structure is a film packaging layer structure and comprises an inorganic film layer and an organic film layer which are arranged in a stacked mode, and the number of the film layers of the packaging layer is determined according to actual requirements.
The invention discloses a preparation method of a display device, which comprises the following steps:
s1: providing a display panel, wherein an array substrate, a light emitting device and a packaging layer are prepared on the display panel;
s2: preparing an inorganic insulating layer on the encapsulation layer;
s3: preparing a lap electrode on the inorganic insulating layer;
s4: preparing an insulating layer on the lap electrode;
s5: digging holes along the end parts of the lap joint electrodes, and removing the insulating layer of the digging hole areas;
s6: filling graphene materials in the hole;
s7: preparing a first touch electrode and a second touch electrode;
s8: preparing a flat layer;
s9: and sticking a polaroid to obtain the display device.
And the filled graphene material is a graphene alcohol solution, and after the solution is completely dried, the first touch electrode and the second touch electrode are prepared.
The beneficial effects of the invention are as follows: compared with the conventional touch circuit and display device which are formed by directly preparing the touch electrode on the packaging layer, the touch panel and display device provided by the invention have the advantages that the touch electrode is combined with the graphene material, and the high toughness of the graphene material and the oxygen-containing functional group on the surface of the graphene material are utilized to form a chemical bond with PVP on the surface of the touch electrode, so that a powerful combined structure is formed, the reliability of contact is improved, the reliability defect caused by bending and contact surfaces can be effectively restrained, and the manufacturing method is simple and can be used for mass production.
Drawings
In order to more clearly illustrate the embodiments or the technical solutions in the prior art, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, it is obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1A to 1B are schematic views of a touch panel according to the present invention.
FIG. 2 is a schematic diagram of a display device according to the present invention;
FIG. 3 is a flow chart of the display device of the present invention;
fig. 4A to 4H are views showing steps of manufacturing a display device according to the present invention.
Detailed Description
The following description of the embodiments refers to the accompanying drawings, which illustrate specific embodiments in which the invention may be practiced. The directional terms mentioned in the present invention, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], etc., are only referring to the directions of the attached drawings. Accordingly, directional terminology is used to describe and understand the invention and is not limiting of the invention. In the drawings, like elements are designated by like reference numerals.
The invention aims at solving the problems that the reliability is poor and even the touch circuit is damaged after the touch electrode is bent for a plurality of times continuously in the existing display device, so that the touch function is lost.
Embodiment one:
fig. 1A to 1B are schematic views of a touch panel according to the present invention; the touch panel structure includes: an inorganic insulating layer 101, a bonding electrode, an insulating layer 103, a graphene material, a first touch electrode 105, a second touch electrode 106, a planarization layer 107, and a substrate 108.
As shown in fig. 1A, the first touch electrode 105 is electrically connected through the overlap electrode 1021 and the graphene material 1041, and the first touch electrode 105 is broken at the junction with the second touch electrode 106 and is divided into two parts, namely 1051 and 1052, and the broken first touch electrode 1051 is electrically connected through the overlap electrode 1021 and the graphene material 1041 and the broken first touch electrode 1052 to form a touch line L1.
Similarly, a schematic structural diagram of the connection between the second touch electrode 106 and the overlap electrode 102 through graphene materials may be obtained, as shown in fig. 1B, that is, a schematic structural diagram of the connection between the second touch electrode 106 and the overlap electrode 1022 and the graphene material 1042 is achieved, where the second touch electrode 106 is broken at the junction with the first touch electrode 105, and is divided into two parts, namely 1061 and 1062, and the broken second touch electrode 1061 is electrically connected with the broken second touch electrode 1062 through the overlap electrode 1022 and the graphene material 1042 to form another touch line L2.
The structural forms shown in fig. 1A and 1B may be combined, or may be separately set, that is, the following three cases are included:
firstly, in the touch panel, only the first touch electrode 105 may be electrically connected through the graphene material 1041 and the overlap electrode 1021 to form a touch line L1, where L1 cooperates with a touch line L2 formed by the existing second touch electrode 106 to implement a touch function;
secondly, in the touch panel, only the second touch electrode 106 may be electrically connected through the graphene material 1042 and the overlap electrode 1022 to form a touch line L2, where L2 cooperates with the touch line L1 formed by the existing first touch electrode 105 to implement a touch function;
thirdly, in the touch panel, the first touch electrode 105 may be electrically connected through the graphene material 1041 and the overlap electrode 1021 to form a touch line L1, and the second touch electrode 106 may be electrically connected through the graphene material 1042 and the overlap electrode 1022 to form a touch line L2, where the touch line L1 cooperates with the overlap electrode 1021 to implement a touch function.
In the touch panel, the graphene material 1041 is electrically connected with the first touch electrode 105 to form n touch lines L1, the graphene material 1042 is electrically connected with the second touch electrode 106 to form m touch lines L2, and the n touch lines L1 and the m touch lines L2 form a touch line of the touch panel, so as to realize a touch function of the touch panel.
An insulating layer 103 is arranged between the overlap electrode and the first touch electrode 105 and between the overlap electrode and the second touch electrode 106, a through hole is arranged on the insulating layer 103, the overlap electrode is connected with the first touch electrode 105 or the second touch electrode 106 through the through hole, graphene materials are filled in the through hole, namely, the bottom of the graphene materials is electrically connected with the overlap electrode, and the top of the graphene materials is electrically connected with the first touch electrode 105 or the second touch electrode 106.
The graphene material is a two-dimensional conductive material with excellent characteristics, has higher toughness, and a large number of oxygen-containing functional groups on the surface of the graphene material can form chemical bonds with PVP on the metal surface to form a powerful combined structure, so that the graphene material is combined with a touch electrode to form a touch panel, the contact reliability of a metal grid can be effectively improved, and the overall reliability strength is improved. The overlap electrode, the first touch electrode 105 and the second touch electrode 106 are patterned electrodes, including but not limited to diamond-shaped and rectangular structures; methods of preparation include, but are not limited to, physical vapor deposition, chemical vapor deposition. The overlap electrode, the first touch electrode 105 and the second touch electrode 106 are made of metal materials with good bending performance, including but not limited to Ti/Al/Ti and AgNW.
The overlap electrode is patterned on the inorganic insulating layer 101, and the inorganic insulating layer is located on a side of the overlap electrode away from the first touch electrode 105 and the second touch electrode 106, and in this embodiment, the inorganic insulating layer 101 is formed on the substrate 108.
The first touch electrode 105 and the second touch electrode 106 are patterned and prepared on the insulating layer 103; and a flat layer 107 is arranged on one side of the first touch electrode 105 and the second touch electrode 106, which is far away from the lap joint electrode, so that the surface is flattened, and the subsequent preparation is conveniently completed by matching with other components.
The inorganic insulating layer 101 and the insulating layer 103 are made of flexible inorganic thin film materials including, but not limited to, siN or SiON; the preparation process includes, but is not limited to, a coating process, physical vapor deposition, chemical vapor deposition.
Embodiment two:
FIG. 2 is a schematic diagram of a display device according to the present invention; the display device comprises an array substrate 210, a light emitting device 209, an encapsulation layer 208, a polarizer 211 and the touch panel.
The touch panel includes: an inorganic insulating layer 201, a lap joint electrode 202, an insulating layer 203, a graphene material 204, a first touch electrode 205, a second touch electrode 206 and a flat layer 207.
The packaging layer 208 is covered on the side, far away from the overlap electrode 202, of the inorganic insulating layer 201, the polarizer 211 is attached to the side, far away from the first touch electrode 205 and the second touch electrode 206, of the flat layer 207, and the surface, to which the polarizer 211 is attached, of the flat layer 207 is a plane, so that the flatness of the polarizer 211 is ensured.
The light emitting device 209 may be an organic light emitting diode including an anode, a light emitting layer, a cathode, and one or more layers of a hole transporting layer, a hole injecting layer, an electron transporting layer, and an electron injecting layer.
The array substrate 210 at least includes a substrate, an array device layer, and the substrate may be a glass substrate or a flexible substrate.
The package layer 208 is a thin film package layer structure, and includes an inorganic film layer and an organic film layer that are stacked, where the number of the package layer film layers can be correspondingly increased or decreased according to different actual requirements, and the invention is not limited in particular.
Fig. 3 is a flowchart showing the preparation of the display device of the present invention, and fig. 4A to 4H are diagrams showing the preparation steps, wherein the marks in the diagrams are consistent with those in fig. 2, and the method comprises the following steps:
s1: providing a display panel on which an array substrate 210, a light emitting device 209, and a packaging layer 208 are prepared, as shown in fig. 4A;
s2: preparing an inorganic insulating layer 201 on the encapsulation layer 208 by a coating method, wherein the thickness of the inorganic insulating layer is 0.3 μm, as shown in fig. 4B;
s3: preparing a patterned overlap electrode 202 with a thickness of 50nm on the inorganic insulating layer 201, as shown in fig. 4C;
s4: preparing an insulating layer 203 on the overlap electrode 202, wherein a film thickness of the insulating layer 203 may be equal to a thickness of the inorganic insulating layer 201, as shown in fig. 4D;
s5: digging holes along the end of the overlap electrode 202, removing the insulating layer 20 in the digging region
3 exposing the edge of the overlap electrode 202, the hole being 3 μm from the edge of the overlap electrode 202, as shown in fig. 4E;
s6: filling graphene material 204 at the hole digging position by adopting an ink-jet printing method, wherein the filled graphene material is a graphene alcohol solution, and the bottom of the graphene material 204 is connected with the lap electrode 202 as shown in fig. 4F;
s7: after the solution is dried, preparing patterned first touch electrode 205 and second touch electrode 206 with a thickness of 50nm on the insulating layer 203 and the graphene material 204, as shown in fig. 4G;
s8: depositing a flat layer 207 on the first touch electrode 205 and the second touch electrode 206, wherein the thickness of the flat layer is 1 μm, as shown in fig. 4H;
s9: a polarizer 211 is attached to the flat layer 207, thereby obtaining a display device as shown in fig. 2.
The preparation method and the film thickness are only used for assisting in explaining the invention, and are not used for limiting the invention, and a person skilled in the art can adopt different preparation methods and film thicknesses according to different design requirements.
In summary, although the present invention has been described in terms of the preferred embodiments, the preferred embodiments are not limited to the above embodiments, and various modifications and changes can be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention is defined by the appended claims.
Claims (8)
1. The touch panel is characterized by comprising a substrate, a first touch electrode and a second touch electrode, wherein the first touch electrode and the second touch electrode are arranged on the substrate, are prepared on the same layer and are in cross insulation;
the touch control device further comprises a lap electrode, wherein the lap electrode is positioned on any side of the first touch control electrode and the second touch control electrode, and is electrically connected with the first touch control electrode or the second touch control electrode at the same intersection point;
a graphene material is arranged between the lap joint electrode and the first touch electrode or the second touch electrode as a conductive medium, an insulating layer is arranged between the lap joint electrode and the first touch electrode or the second touch electrode, a through hole is formed in the insulating layer, the lap joint electrode is connected with the first touch electrode or the second touch electrode through the through hole, and the graphene material is filled in the through hole; the overlap electrode, the first touch electrode and the second touch electrode are Ti/Al/Ti or AgNW.
2. The touch panel of claim 1, wherein the touch electrode electrically connected to the overlap electrode is broken at a junction with another touch electrode, and end points formed by the broken line are respectively connected to the overlap electrode through graphene materials.
3. The touch panel according to claim 1, wherein the insulating layer is a flexible inorganic thin film material, and the material is SiN or SiON.
4. The touch panel according to claim 1, wherein an inorganic insulating layer is disposed on a side of the overlap electrode away from the first touch electrode and the second touch electrode, the inorganic insulating layer is a flexible inorganic thin film material, and the material is SiN or SiON.
5. The touch panel according to claim 1, wherein a flat layer is disposed on a side of the first touch electrode and the second touch electrode away from the overlap electrode.
6. A display device comprising the touch panel according to claims 1 to 5.
7. A method of manufacturing a display device, comprising the steps of:
s1: providing a display panel, wherein an array substrate, a light emitting device and a packaging layer are prepared on the display panel;
s2: preparing an inorganic insulating layer on the encapsulation layer;
s3: preparing a lap electrode on the inorganic insulating layer;
s4: preparing an insulating layer on the lap electrode;
s5: preparing a hole digging area along the end part of the lap joint electrode, and removing the insulating layer of the hole digging area;
s6: filling graphene materials in the hole;
s7: preparing a first touch electrode and a second touch electrode;
s8: preparing a flat layer;
s9: pasting a polaroid to obtain a display device; wherein the display device is a flexible display device; the overlap electrode, the first touch electrode and the second touch electrode are Ti/Al/Ti or AgNW.
8. The method of claim 7, wherein the filled graphene material is a graphene alcohol solution.
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| CN201910699875.8A CN110471563B (en) | 2019-07-31 | 2019-07-31 | Touch panel, display device and preparation method of touch panel |
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| KR101357585B1 (en) * | 2011-12-08 | 2014-02-11 | 엘지이노텍 주식회사 | Conductive pattern of touch panel and forming method for the same |
| TW201443725A (en) * | 2013-05-13 | 2014-11-16 | Hon Hai Prec Ind Co Ltd | Touch screen and method of manufacturing the same |
| CN104750284B (en) * | 2013-12-27 | 2019-02-19 | 昆山工研院新型平板显示技术中心有限公司 | A touch display device and a manufacturing method thereof |
| KR102216543B1 (en) * | 2014-06-16 | 2021-02-17 | 삼성전자주식회사 | Graphene-Metal bonding structure and method of manufacturing the same, and semiconductor device having graphene-Metal bonding structure |
| CN107479754B (en) * | 2017-08-22 | 2020-07-28 | 武汉天马微电子有限公司 | Flexible touch sensor and flexible touch display panel |
| CN108807470B (en) * | 2018-05-28 | 2021-05-07 | 武汉华星光电半导体显示技术有限公司 | Manufacturing method of touch display screen |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160006880A (en) * | 2014-07-09 | 2016-01-20 | 삼성디스플레이 주식회사 | Display device and manufacturing method thereof |
| CN104679343A (en) * | 2015-03-26 | 2015-06-03 | 京东方科技集团股份有限公司 | Touch display device, touch panel, conductive bridging method and bridging structure |
| CN106527805A (en) * | 2016-10-31 | 2017-03-22 | 上海天马微电子有限公司 | Display panel, display device and manufacturing method of display panel |
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