CN111198627A - Conductive film and touch screen - Google Patents

Conductive film and touch screen Download PDF

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Publication number
CN111198627A
CN111198627A CN201811368202.6A CN201811368202A CN111198627A CN 111198627 A CN111198627 A CN 111198627A CN 201811368202 A CN201811368202 A CN 201811368202A CN 111198627 A CN111198627 A CN 111198627A
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CN
China
Prior art keywords
conductive film
ground
branches
branch
signal line
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Pending
Application number
CN201811368202.6A
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Chinese (zh)
Inventor
王平
周小珍
许建勇
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Jiangxi Zhuoxin Microelectronics Co ltd
Original Assignee
Nanchang OFilm Touch Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Priority to CN201811368202.6A priority Critical patent/CN111198627A/en
Publication of CN111198627A publication Critical patent/CN111198627A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05FSTATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
    • H05F3/00Carrying-off electrostatic charges
    • H05F3/02Carrying-off electrostatic charges by means of earthing connections

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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)
  • Elimination Of Static Electricity (AREA)

Abstract

The invention relates to a conductive film and a touch screen. The conductive film includes: a substrate; the signal line is arranged on the substrate; the ground wire is arranged on the substrate and surrounds the signal wire; the ground wire comprises a plurality of branches and a plurality of connecting portions, the branches surround the signal wire, the branches are spaced from each other, and two adjacent branches are connected through the connecting portions to form a plurality of hollow areas. After the ground wire is adopted, when the conductive film is subjected to static charges which are knocked in from the side, the static charges can be dispersed towards a plurality of directions under the action of the hollowed-out area, the static charges are prevented from being concentrated and accumulated in a certain area close to one side of the signal wire, and therefore the situation that the signal wire is knocked due to the fact that the charges are accumulated too much in the certain area of the ground wire is effectively prevented.

Description

Conductive film and touch screen
Technical Field
The invention relates to the technical field of antistatic release, in particular to a conductive film and a touch screen.
Background
Electronic devices such as touch panels generally include a conductive film, and a ground line surrounding a signal line is provided on the periphery of the signal line of the conductive film to prevent static electricity from damaging the signal line from the side of the conductive film. However, in the conductive film with such a structure, static electricity is easily transmitted from the side of the ground line far from the signal line to the side of the ground line near the signal line in a static electricity test, and charges are accumulated at a certain point of the ground line, and when the charges are accumulated to a certain amount, an air layer between the ground line and the signal line is broken down, so that the signal line is damaged.
Disclosure of Invention
Accordingly, it is necessary to provide a conductive film and a touch panel, which solve the problem that the ground line of the conventional conductive film easily accumulates charges to break down the air layer between the ground line and the signal line, thereby causing damage to the signal line.
A conductive film, comprising:
a substrate;
the signal line is arranged on the substrate; and
the ground wire is arranged on the substrate and surrounds the signal wire;
the ground wire comprises a plurality of branches and a plurality of connecting portions, the branches surround the signal wire, the branches are spaced from each other, and two adjacent branches are connected through the connecting portions to form a plurality of hollow areas.
In the conductive film, the plurality of branches and the plurality of connecting parts in the ground wire form a plurality of charge conduction loops, when the conductive film receives electrostatic charges which are impacted from the side surface, the electrostatic charges are dispersed to a plurality of areas under the action of the conduction loops, and the accumulation amount of the electrostatic charges which are concentrated in a certain area close to the signal wire side is reduced, so that the situation that the signal wire is impacted in the certain area in the ground wire due to the excessive charge accumulation is effectively prevented.
In one embodiment, two adjacent branches form a branch group, and the connecting portions in the two adjacent branch groups are arranged in a staggered manner. The staggered arrangement mode prevents the electrostatic charges from being directly conducted to one side of the ground wire close to the signal wire through the connecting part.
In one embodiment, two adjacent branches form a branch group, and in the two adjacent branch groups, the number of the hollow-out areas of one branch group is the same as that of the connecting parts of the other branch group, and the hollow-out areas of one branch group correspond to the connecting parts of the other branch group one by one. The hollow areas and the connecting parts are the same in number and correspond one to one, so that the ground wire is easier to realize in the manufacturing process.
In one embodiment, in two adjacent branch groups, the connecting part in one branch group is opposite to the middle part of the hollowed-out area in the other branch group. The conduction of electrostatic charges in the ground line cannot be conducted directly to the side of the ground line close to the signal line.
In one embodiment, two adjacent branches form a branch group, and the connecting portions in the branch group gradually decrease in the direction from the ground line to the signal line. The ground wire with the structure can disperse the electrostatic charges to one side far away from the signal wire before the electrostatic charges are conducted to one side near the signal wire, so that the accumulated amount of the electrostatic charges reaching one side near the signal wire is reduced, and the possibility of breakdown is reduced.
In one embodiment, the number of the branches is three, the number of the branch groups is two, and in the direction from the ground line to the signal line, one hollow-out area of the branch group close to the signal line corresponds to two connecting portions of another branch group.
In one embodiment, the ground line further includes two ground portions, and the two ground portions are respectively disposed at two ends of the ground line and respectively connected to the plurality of branches. In this manner, electrostatic charges are facilitated to be conducted out of the ground line through the ground portion.
In one embodiment, the plurality of branches, the plurality of connecting portions and the two grounding portions are integrally formed. Therefore, the manufacturing process of the ground wire can be simpler.
In one embodiment, the number of the ground wires is multiple, and the multiple ground wires are arranged at intervals. The plurality of ground wires are arranged at intervals on the periphery of the signal wire, so that a better anti-static function is achieved.
A touch screen comprises a protective cover plate and the conductive film, wherein the signal line comprises a touch electrode and a lead electrically connected with the touch electrode, and one end, far away from the touch electrode, of the lead is located between two ends of a ground wire.
By adopting the conductive film in the above embodiment, the touch screen has good antistatic capability, and the lead wires therein are not easily damaged by electrostatic shock.
Drawings
Fig. 1 is a schematic diagram of a conductive film according to an embodiment of the invention;
FIG. 2 is an enlarged schematic view of an embodiment of a portion circled A in FIG. 1;
FIG. 3 is an enlarged schematic view of another embodiment of portion A of FIG. 1;
fig. 4 is a schematic diagram of a conductive film including two ground lines according to an embodiment of the present invention;
fig. 5 is a schematic view of a touch screen according to an embodiment of the invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1, the conductive film 10 includes a substrate 100, a signal line 200, and a ground line 300. The signal line 200 is disposed on one side of the substrate 100, the ground line 300 is disposed on the substrate 100 and surrounds the signal line 200, and the ground line 300 and the signal line 200 have a spacing distance, so that an air layer is formed between the ground line 300 and the signal line 200.
As shown in fig. 2, in some embodiments, the ground line 300 includes a plurality of branches 310 surrounding the signal line 200, the plurality of branches 310 are spaced apart from each other, and two adjacent branches 310 are connected by a plurality of connecting portions 320 spaced apart from each other, and meanwhile, a plurality of hollow-out regions 330 are formed by the plurality of connecting portions 320 spaced apart from each other and the two connected branches 310.
In some embodiments, the plurality of branches 310 are arranged at equal intervals, the plurality of connecting portions 320 on two adjacent branches 310 are arranged at equal intervals, and the lengths of the connecting portions 320 are the same. In other embodiments, the spacing distance between the branches 310 and the spacing distance between the connecting portions 320 are determined according to actual production processes and requirements, and may be arranged at unequal intervals, and the lengths of the connecting portions 320 may be different. Since the branches 310 and the connection portions 320 are both conductors and can conduct electric charges, the plurality of branches 310 and the plurality of connection portions 320 in the ground line 300 constitute a plurality of charge conducting loops, and the electrostatic charges 500 striking the ground line 300 from the side of the conductive film 10 are distributed into a plurality of regions by the conducting loops, so that the accumulation amount of the electrostatic charges 500 concentrated in a certain region of the ground line 300 close to the signal line 200 is reduced, and the signal line 200 is effectively prevented from being struck by excessive charge accumulation in a certain region of the ground line 300. In the dispersion process, part of the electrostatic charges 500 are conducted and dispersed to a plurality of areas on the side of the ground line 300 close to the signal line 200, and the other part of the electrostatic charges are returned to a plurality of areas on the side of the ground line 300 far from the signal line 200 through the connection portion 320 and the branch 310.
Additionally, in some embodiments, the medium in the hollowed-out area 330 is air. In other embodiments, the hollow-out region 330 may also be filled with a solid insulating medium.
As shown in fig. 2, in an embodiment, two adjacent branches 310, the connection portions 320 between two adjacent branches 310, and the hollow-out regions 330 between two adjacent branches 310 form a branch group 400, the connection portions 320 in two adjacent branch groups 400 are arranged in a staggered manner, that is, there is no overlapping portion of the connection portions 320 in two adjacent branch groups 400 in the direction from the ground line 300 to the signal line 200, and in the direction from the ground line 300 to the signal line 200, two adjacent connection portions 320 are not in positive conduction. At this time, the electrostatic charges 500 striking the ground line 300 from the side of the conductive film 10 cannot be directly conducted to the side of the ground line 300 close to the signal line 200, so that the accumulation amount of the electrostatic charges 500 in the direct conducting direction is effectively reduced, and the electrostatic breakdown phenomenon is better avoided.
As shown in fig. 2, in some embodiments, the number of the hollow-out areas 330 of one branch group 400 is the same as the number of the connection portions 320 of another branch group 400, and the structure makes the ground wire 300 easier to implement in terms of manufacturing process. Specifically, the connecting portion 320 of one branch group 400 is aligned with the middle of the hollow-out area 330 of another adjacent branch group 400. In other embodiments, the connection portion 320 may be located at any position of the hollow area 330, as long as there is no overlapping portion between the connection portions 320 in two adjacent branch groups 400 in the direction from the ground line 300 to the signal line 200. The above-mentioned facing structure can make the ground wire 300 easy to produce and manufacture, and the non-facing structure is beneficial to the bending part of the ground wire 300 to provide better bending effect at some bending parts of the ground wire 300.
In one embodiment as shown in fig. 3, in the direction from the ground line 300 to the signal line 200, the connecting portions 320 in the branch groups 400 gradually decrease, that is, the number of the hollow-out areas 330 of one branch group 400 is different from the number of the connecting portions 320 of another branch group 400, and thus a one-to-one correspondence relationship is not formed. The structure of the ground line 300 enables the electrostatic charges 500 to be more dispersed toward the side of the ground line 300 away from the signal line 200 before being conducted toward the side close to the signal line 200, thereby reducing the amount of accumulated electrostatic charges 500 reaching the side close to the signal line 200 and reducing the possibility of occurrence of breakdown.
Specifically, in some embodiments, one ground line 300 includes three branches 310, that is, the number of the branch groups 400 in the ground line 300 is two, and the hollow-out area 330 in the branch group 400 close to the signal line 200 corresponds to two adjacent connection portions 320 in another branch group 400, that is, the length of the hollow-out area 330 in the branch group 400 close to the signal line 100 along the extension direction of the branch 310 is equal to or greater than the sum of the lengths of the hollow-out area 330 and the two adjacent connection portions 320 in the adjacent branch group. In other embodiments, three or more adjacent connection portions 320 in one branch group 400 correspond to the hollow-out regions 330 of the branch group 400 close to the signal line 200.
In other embodiments, a ground line 300 may also include four or more branches 310. When the number of branches 310 in the ground line 300 increases, the number of conduction loops formed by the branches 310 and the connection portion 320 also increases, and at this time, more electrostatic charges 500 are dispersed to different areas along the conduction loops, so that the electrostatic charges 500 are better prevented from being concentrated on a certain area.
In some embodiments as shown in fig. 1, the ground line 300 further includes two ground portions 340, the two ground portions 340 are respectively disposed at two ends of the ground line 300 and are respectively connected to the plurality of branches 310, wherein the ground portions 340 are conductive, and the electrostatic charges 500 accumulated in the ground line 300 are led out through the ground portions 340.
In some embodiments, the plurality of branches 310, the plurality of connecting portions 320, and the two grounding portions 340 are integrally formed, so that the manufacturing process of the ground wire is simpler. In some embodiments, the method for manufacturing the conductive film 10 includes the following steps: providing a substrate 100 having a signal line 200; forming a conductive line surrounding the signal line 200 on the substrate 100; the conductive lines are laser-processed or exposure-developed to form the ground line 300, and the plurality of branches 310, the plurality of connection parts 320, and the two ground parts 340 of the ground line 300 are simultaneously formed.
In one embodiment as shown in fig. 4, the conductive film 10 includes two ground lines 300, and the two ground lines 300 are spaced apart and share two ground portions 340. In other embodiments, if the conductive film 10 has enough space for disposing the ground lines 300 and the width of the ground lines 300 is relatively small, the conductive film 10 may further include three or more ground lines 300.
As shown in fig. 5, in some embodiments, the touch screen 60 includes a protective cover 610 and the conductive film 10 of any of the above embodiments, the conductive film 10 is disposed on one side of the protective cover 610, wherein the signal line 200 includes a touch electrode 210 and a lead 220 electrically connected to the touch electrode 210, and one end of the lead 220 away from the touch electrode 210 is located between two ends of the ground line 300, so that two ends of the ground line 300 and one end of the lead 220 away from the touch electrode 210 are connected to a same flexible circuit board and connected to an external circuit through the same flexible circuit board. By using the conductive film 10 in the above embodiment, the touch panel 60 has good antistatic capability, and the lead lines 220 therein are not easily damaged by electrostatic shock.
In some embodiments, the touch electrode 210 is an ITO electrode, the lead line 220 is one of a silver paste line, a copper line and an ITO trace, and the ground line 300 is one of a silver paste line, a copper line and an ITO trace.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A conductive film, comprising:
a substrate;
the signal line is arranged on the substrate; and
the ground wire is arranged on the substrate and surrounds the signal wire;
the ground wire comprises a plurality of branches and a plurality of connecting portions, the branches surround the signal wire, the branches are spaced from each other, and two adjacent branches are connected through the connecting portions to form a plurality of hollow areas.
2. The conductive film according to claim 1, wherein two adjacent branches constitute a branch group, and the connecting portions in two adjacent branch groups are arranged in a staggered manner.
3. The conductive film according to claim 1, wherein two adjacent branches form a branch group, and in two adjacent branch groups, the number of the hollow areas of one branch group is the same as the number of the connecting portions of the other branch group, and the hollow areas are in one-to-one correspondence.
4. The conductive film according to claim 3, wherein in two adjacent branch groups, the connecting portion in one branch group is opposite to the middle of the hollow-out area in the other branch group.
5. The conductive film according to claim 1, wherein two adjacent branches constitute a branch group, and the connecting portions in the branch group gradually decrease in a direction from the ground line to the signal line.
6. The conductive film according to claim 5, wherein the number of the branches is three, the number of the branch groups is two, and one hollow-out region of the branch group near the signal line corresponds to two connection portions of another branch group in a direction from the ground line to the signal line.
7. The conductive film according to claim 1, wherein the ground line further comprises two ground portions, and the two ground portions are respectively provided at both ends of the ground line and are respectively connected to the plurality of branch lines.
8. The conductive film according to claim 7, wherein the plurality of branch portions, the plurality of connecting portions, and the two ground portions are formed integrally.
9. The conductive film according to claim 1, wherein the number of the ground lines is plural, and the plural ground lines are arranged at intervals.
10. A touch screen, comprising a protective cover and the conductive film of any one of claims 1-9, wherein the conductive film is disposed on one side of the protective cover, and the signal line comprises a touch electrode and a lead electrically connected to the touch electrode, and one end of the lead away from the touch electrode is located between two ends of the ground line.
CN201811368202.6A 2018-11-16 2018-11-16 Conductive film and touch screen Pending CN111198627A (en)

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Application Number Priority Date Filing Date Title
CN201811368202.6A CN111198627A (en) 2018-11-16 2018-11-16 Conductive film and touch screen

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Application Number Priority Date Filing Date Title
CN201811368202.6A CN111198627A (en) 2018-11-16 2018-11-16 Conductive film and touch screen

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CN111198627A true CN111198627A (en) 2020-05-26

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8585455B1 (en) * 2012-09-26 2013-11-19 Eastman Kodak Company Making display device with pixel-aligned ground micro-wire
TWM470309U (en) * 2013-07-25 2014-01-11 Emerging Display Tech Corp Touch panel with hollow ground line
CN203519954U (en) * 2013-10-14 2014-04-02 北京京东方光电科技有限公司 Array substrate and display device
CN103941895A (en) * 2013-01-18 2014-07-23 和鑫光电股份有限公司 Touch panel
CN204440349U (en) * 2015-02-12 2015-07-01 深圳市信濠光电科技有限公司 A kind of Antistatic touch screen
CN104866126A (en) * 2014-02-25 2015-08-26 宸鸿科技(厦门)有限公司 Touch panel
CN105183219A (en) * 2015-08-26 2015-12-23 京东方科技集团股份有限公司 Substrate, making method of substrate and display device adopting substrate
CN106527816A (en) * 2016-12-01 2017-03-22 京东方科技集团股份有限公司 Touch substrate, preparation method thereof and touch display device
CN206133510U (en) * 2016-08-26 2017-04-26 厦门天马微电子有限公司 Touch display panel and touch display device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8585455B1 (en) * 2012-09-26 2013-11-19 Eastman Kodak Company Making display device with pixel-aligned ground micro-wire
CN103941895A (en) * 2013-01-18 2014-07-23 和鑫光电股份有限公司 Touch panel
TWM470309U (en) * 2013-07-25 2014-01-11 Emerging Display Tech Corp Touch panel with hollow ground line
CN203519954U (en) * 2013-10-14 2014-04-02 北京京东方光电科技有限公司 Array substrate and display device
CN104866126A (en) * 2014-02-25 2015-08-26 宸鸿科技(厦门)有限公司 Touch panel
CN204440349U (en) * 2015-02-12 2015-07-01 深圳市信濠光电科技有限公司 A kind of Antistatic touch screen
CN105183219A (en) * 2015-08-26 2015-12-23 京东方科技集团股份有限公司 Substrate, making method of substrate and display device adopting substrate
CN206133510U (en) * 2016-08-26 2017-04-26 厦门天马微电子有限公司 Touch display panel and touch display device
CN106527816A (en) * 2016-12-01 2017-03-22 京东方科技集团股份有限公司 Touch substrate, preparation method thereof and touch display device

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Applicant after: Jiangxi Zhuoxin Microelectronics Co.,Ltd.

Address before: 330096 no.1404, Tianxiang North Avenue, Nanchang hi tech Industrial Development Zone, Nanchang City, Jiangxi Province

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