CN102929470A - Method and structure for improving anti-interference of capacitive touch screen - Google Patents
Method and structure for improving anti-interference of capacitive touch screen Download PDFInfo
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- CN102929470A CN102929470A CN2012104744435A CN201210474443A CN102929470A CN 102929470 A CN102929470 A CN 102929470A CN 2012104744435 A CN2012104744435 A CN 2012104744435A CN 201210474443 A CN201210474443 A CN 201210474443A CN 102929470 A CN102929470 A CN 102929470A
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Abstract
The invention provides a method and a structure for improving anti-interference of a capacitive touch screen. The method is characterized in that: firstly, increasing a virtual wire in a blank region on a panel of the touch screen, namely filling the part outside a display region with the wire, and enabling internal parts of the increased virtual wire to be in mutual connection so as to form a virtual line; and secondly, connecting the virtual line with the grounding part of a touch chip to form a shield circuit. According to the invention, interferences of factors such as temperature, humidity, environmental electric field, and reflection of light to the capacitive touch screen are eliminated, in addition, the cost is low, and the efficiency is high.
Description
Technical field
The present invention relates to the touch sensor technologies field, is a kind of manufacturing technology of capacitive touch screen, specifically, is a kind of raising capacitive touch screen anti-disturbance method and structure.
Background technology
On structure, capacitive touch screen is a multilayer compound glass screen, and it comprises touch panel and the touch chip that joins with touch panel; The transparent indium tin oxide conductive layer is contained on the touch panel surface; Utilize the electric current induction of human body to carry out work.Metal conducting layer (the tin indium oxide that layer of transparent is arranged at glass surface, be commonly called as ITO), when finger touches is on metal level, because people's bulk electric field, user and touch screen surface form a coupling capacitance, the electric capacity of contact will change, and just can detect the position of touch point according to the electric capacity that changes.Capacitive touch screen can be responded to slight fast touch, Anti-scratching, the waterproof and dustproof of reaching well, is fit to use under the rugged surroundings.
The ITO electro-conductive glass is on the basis of sodium calcium base or silicon boryl substrate glass, utilizes the method for magnetron sputtering to plate indium oxide layer tin film processing and fabricating and forms.
Surface capacitance type touch screen only adopts individual layer ITO, when the finger touch screen surface, just has a certain amount of electric charge and transfers to human body.In order to recover these loss of charge, electric charge replenishes into from four jiaos of screen, and the quantity of electric charge that all directions are replenished and the distance of touch point are in direct ratio, can extrapolate thus the position of touch point.
Because the principle of capacitive touch screen is electric field induction, the factors such as air humidity, temperature, environment of electric field all can cause interference, and resolution is low, the defective of easy drift thereby produce.Therefore, so that capacitive touch screen can stably be realized accurate location, must in the correction process defective, eliminate these interference problems.The present invention has just described the anti-interference method that a kind of electric field induction drives.
In addition, in common capacitive touch screen, have a zone relatively responsive, be on the substrate of glass white space without the ITO electrode, because electrodeless, easily cause serious reflectively herein, impact normally shows.Method of the present invention can solve the problem of reflective interference in the lump.
Summary of the invention
The objective of the invention is easily to produce the problem that causes drift of disturbing for existing capacitive touch screen, invent a kind of raising capacitive touch screen anti-disturbance method, thereby eliminate humiture and environment of electric field to interference and the reflective interference that brings of touch-screen, a kind of capacitive touch screen of good in anti-interference performance is provided simultaneously.
Technical scheme of the present invention is:
A kind of raising capacitive touch screen anti-disturbance method is characterized in that at first the white space on touch panel increases Virtual Wiring, namely in the viewing area beyond filling wiring, and make the increase Virtual Wiring inside that the increases formation virtual circuit that is connected with each other; Secondly, virtual circuit is linked to each other with the grounded part that touches chip and form screened circuit.
Described Virtual Wiring is made by the method that the transparent indium tin oxide conductive layer to the touch panel surface carries out dry etching or wet etching.
Described Virtual Wiring is by adopting the mode of serigraphy low-temperature silver slurry to be made on the touch panel surface without the zone of transparent indium tin oxide.
Described Virtual Wiring be shaped as arc type, discontinuous form, perpendicular type or cross in one or more combination.
Touch chip on the described touch panel is provided with the grounded part that matches with the virtual circuit tendency, it comprise single-endedly draw, draw at two ends or multiterminal are drawn.
Two of technical scheme of the present invention is:
A kind of capacitive touch screen is characterized in that it comprises touch panel and the touch chip that joins with touch panel, and touch panel contains the transparent indium tin oxide conductive layer; White space on touch panel is provided with Virtual Wiring, filling wiring (being commonly called as dummy-line) beyond namely in the viewing area, the wiring inside formation virtual circuit that is connected with each other, described virtual circuit links to each other with the grounded part that touches chip, the formation screened circuit.
Grounding mode of the present invention can shield rub-out signal, thereby can greatly reduce environment of electric field to the interference of touch-screen; Simultaneously, because the filling of Virtual Wiring, originally large stretch of blank has disappeared on the substrate of glass, thereby has also eliminated the reflective interference that causes.
Virtual Wiring among the present invention can adopt by the method for transparent indium tin oxide being carried out dry etching or wet etching, the reinforcement of coordination galvanization metal routing and make; Also can adopt the mode of serigraphy low-temperature silver slurry to make without the zone of transparent indium tin oxide.
The shape of the Virtual Wiring among the present invention has multiple possibility, such as arc type, discontinuous form, perpendicular type, the various shape such as cross.
Although described Virtual Wiring can adopt various shape, in order to suppress to crosstalk, should avoid the parallel cabling of long distance during designing wiring, and can not intersect with the graph area generation, preferably can select short and thick, uniform lines, reduce its impedance as far as possible.
On the touch chip among the present invention the grounded part that matches with the virtual circuit tendency is arranged, comprise single-endedly draw, draw at two ends or multiterminal are drawn.
Beneficial effect of the present invention:
1, the present invention's white space around the touch screen induction device is filled Virtual Wiring, and these dummy line are drawn ground connection by the pin that increases, and the interference of rub-out signal is shielded, thereby eliminate the impact that unusually causes of temperature, humidity and environment; In the area filling wiring of substrate of glass large tracts of land blank, also can eliminate the reflective interference that causes, so that capacitive touch screen normally shows simultaneously.
2, method of the present invention is simple, efficient, and it is convenient to implement, and can eliminate the interference that temperature, humidity, environment of electric field cause, and reflective interference.
Description of drawings
Fig. 1 is one of structural representation of capacitive touch screen of the present invention.
Fig. 2 be capacitive touch screen of the present invention structural representation two.
Fig. 3 is discontinuous form Virtual Wiring schematic diagram of the present invention.
Fig. 4 is arc type Virtual Wiring schematic diagram of the present invention.
Fig. 5 is perpendicular type Virtual Wiring schematic diagram of the present invention.
Fig. 6 is cross Virtual Wiring schematic diagram of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples, but the present invention is not limited in this embodiment.
Embodiment one.
As shown in Figure 1.
The capacitive touch screen that a kind of interference free performance is high, it comprises touch panel and the touch chip that joins with touch panel; Touch panel contains the transparent indium tin oxide conductive layer; White space increase on touch panel has Virtual Wiring [namely in the viewing area beyond filling wiring] (being commonly called as dummy-line), the wiring inside formation virtual circuit that is connected with each other; Virtual circuit links to each other with the grounded part that touches chip, forms screened circuit.
In conjunction with Fig. 1, the structure of first embodiment of the invention is described.On the clear glass substrate 1 indium tin oxide layer is arranged, make transparency electrode 2 at indium tin oxide layer; When making transparency electrode, utilize photoetching method to make ITO Virtual Wiring (dummy-line) 3; Then serigraphy insulation protection glue-line 4 is for the protection of the transparency electrode of graph area; Afterwards the cabling intensive treatment is carried out in the electrode of lead-in wire, namely adopt the mode of plated metal 5 to reduce its impedance, in this process, the ITO electrode at Virtual Wiring place also carries out intensive treatment in the lump; Virtual Wiring inside is communicated with, and finally effective extraction electrode and virtual circuit are drawn simultaneously gets final product by touching chip 6.This is a kind of panel of capacitive touch screen, and being fitted with tempered glass 8 and LCDs 9 respectively by insulating gel 7 in the two sides of panel at last gets final product.When making Virtual Wiring, can adopt dry etching or wet etching.Dry etching is to be coated with after the photoresists, adopts the method for laser scanning to make Virtual Wiring.Wet etching then is to adopt the method for acid solution spray to make Virtual Wiring after the coating photoresists.Virtual Wiring be distributed in capacitive touch screen panel around, i.e. non-display area, by certain a bit with touch chip and link to each other and draw ground connection, form screened circuit, thereby eliminate interference.Wherein need to prove, adopt the mode cost of manufacture of dry etching higher, operation is loaded down with trivial details, and the resolution of the electrode that can make is lower comparatively speaking; But it is higher to make yields when adopting this mode.No matter adopt dry etching or wet etching, all need later stage plated metal on the ITO electrode to carry out the cabling intensive treatment.The impedance of the Virtual Wiring that this dual mode is made is all less, but cost is higher comparatively speaking.
Embodiment two.
As shown in Figure 2.
The capacitive touch screen that a kind of interference free performance is high, it comprises touch panel and the touch chip that joins with touch panel; Touch panel contains the transparent indium tin oxide conductive layer; White space increase on touch panel has Virtual Wiring [namely in the viewing area beyond filling wiring] (being commonly called as dummy-line), the wiring inside formation virtual circuit that is connected with each other; Virtual circuit links to each other with the grounded part that touches chip, forms screened circuit.As shown in Figure 2, on the clear glass substrate 1 indium tin oxide layer is arranged, be manufactured with transparency electrode 2 at indium tin oxide layer; Then serigraphy insulation protection glue 4 is for the protection of the transparency electrode of graph area; Again adopt afterwards the mode of printing low-temperature silver slurry 10 to make Virtual Wiring at non-display area; Effective extraction electrode and virtual circuit are drawn simultaneously get final product by touching chip 6 at last.Need to prove, the mode that adopts serigraphy low-temperature silver slurry to make Virtual Wiring has increased two procedures, and is consuming time more.But the electrode impedance of making is less, and cost is lower.
Embodiment three.
Shown in Fig. 3,4,5,6.
The present embodiment and embodiment one, two difference are that the shape of Virtual Wiring has multiple possibility, such as discontinuous form, arc type, perpendicular type, the various shape such as cross.The 11st, touch panel, the 12nd, viewing area.Although described Virtual Wiring can adopt various shape, in order to suppress to crosstalk, should avoid the parallel cabling of long distance during designing wiring, and can not intersect with the graph area generation, preferably can select short and thick, uniform lines, reduce its impedance as far as possible.For with virtual circuit coupling, on the touch chip among the present invention the grounded part that matches with the virtual circuit tendency is arranged, comprise single-endedly draw, draw at two ends or multiterminal are drawn.
Embodiment four.
Comprehensive embodiment one～three as seen, raising capacitive touch screen anti-disturbance method of the present invention is that at first the white space on touch panel increases Virtual Wiring, filling wiring beyond namely in the viewing area, and make the Virtual Wiring inside that the increases formation virtual circuit that is connected with each other; Secondly, virtual circuit is linked to each other with the grounded part that touches chip and form screened circuit.
Do not relate in the literary composition part all the prior art that maybe can adopt same as the prior art realized.The above is the preferred embodiments of the present invention, but the present invention also is not limited to above only embodiment, slightly does improvement and also will be considered as protection scope of the present invention on embodiment.
Claims (6)
1. one kind is improved the capacitive touch screen anti-disturbance method, it is characterized in that at first the white space on touch panel increases Virtual Wiring, namely in the viewing area beyond filling wiring, and make the Virtual Wiring inside that the increases formation virtual circuit that is connected with each other; Secondly, virtual circuit is linked to each other with the grounded part that touches chip and form screened circuit.
2. method according to claim 1 is characterized in that described Virtual Wiring is made by the method that the transparent indium tin oxide conductive layer to the touch panel surface carries out dry etching or wet etching.
3. method according to claim 1 is characterized in that described Virtual Wiring is by adopting the mode of serigraphy low-temperature silver slurry to be made on the touch panel surface without the zone of transparent indium tin oxide.
4. method according to claim 1, it is characterized in that described Virtual Wiring be shaped as arc type, discontinuous form, perpendicular type or cross in one or more combination.
5. method according to claim 1 is characterized in that the touch chip on the described touch panel is provided with the grounded part that matches with the virtual circuit tendency, it comprise single-endedly draw, draw at two ends or multiterminal are drawn.
6. a capacitive touch screen is characterized in that it comprises touch panel and the touch chip that joins with touch panel, and touch panel contains the transparent indium tin oxide conductive layer; White space on touch panel is provided with Virtual Wiring, filling wiring (being commonly called as dummy-line) beyond namely in the viewing area, the wiring inside formation virtual circuit that is connected with each other, described virtual circuit links to each other with the grounded part that touches chip, the formation screened circuit.
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| CN2012104744435A CN102929470A (en) | 2012-11-21 | 2012-11-21 | Method and structure for improving anti-interference of capacitive touch screen |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104182072A (en) * | 2013-05-21 | 2014-12-03 | 胜华科技股份有限公司 | Touch control panel |
| CN104750888A (en) * | 2013-12-30 | 2015-07-01 | 北京华大九天软件有限公司 | Wiring method for connecting two groups of vertical ports in orthogonal equal width mode in layout |
| CN106020547A (en) * | 2016-05-26 | 2016-10-12 | 京东方科技集团股份有限公司 | Substrate, touch screen and touch display device |
| CN108021268A (en) * | 2016-10-28 | 2018-05-11 | 乐金显示有限公司 | Touch sensor integrated-type display device |
| CN111752022A (en) * | 2020-07-14 | 2020-10-09 | 武汉华星光电技术有限公司 | Display panel and display device |
| CN114721193A (en) * | 2022-04-21 | 2022-07-08 | 滁州惠科光电科技有限公司 | Array substrate and display panel |
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| CN102667688A (en) * | 2010-03-11 | 2012-09-12 | 阿尔卑斯电气株式会社 | Translucent inputting device |
| CN202533917U (en) * | 2012-03-29 | 2012-11-14 | 成都伟易达科技有限公司 | Single-sided low-cost surface-capacitive touch screen |
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| US20080129317A1 (en) * | 2006-12-01 | 2008-06-05 | Katsuichi Oba | Input device and method of manufacturing the same |
| CN201465086U (en) * | 2009-07-03 | 2010-05-12 | 深圳市汇顶科技有限公司 | Anti-interference capacitive touch screen and electronic device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104182072A (en) * | 2013-05-21 | 2014-12-03 | 胜华科技股份有限公司 | Touch control panel |
| CN104750888A (en) * | 2013-12-30 | 2015-07-01 | 北京华大九天软件有限公司 | Wiring method for connecting two groups of vertical ports in orthogonal equal width mode in layout |
| CN106020547A (en) * | 2016-05-26 | 2016-10-12 | 京东方科技集团股份有限公司 | Substrate, touch screen and touch display device |
| WO2017202070A1 (en) * | 2016-05-26 | 2017-11-30 | 京东方科技集团股份有限公司 | Substrate, touch screen and touch display apparatus |
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| US10506693B2 (en) | 2016-05-26 | 2019-12-10 | Boe Technology Group Co., Ltd. | Substrate, touch screen and touch display device |
| CN108021268A (en) * | 2016-10-28 | 2018-05-11 | 乐金显示有限公司 | Touch sensor integrated-type display device |
| CN108021268B (en) * | 2016-10-28 | 2020-12-01 | 乐金显示有限公司 | Touch sensor integrated type display device |
| CN111752022A (en) * | 2020-07-14 | 2020-10-09 | 武汉华星光电技术有限公司 | Display panel and display device |
| CN114721193A (en) * | 2022-04-21 | 2022-07-08 | 滁州惠科光电科技有限公司 | Array substrate and display panel |
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Owner name: NANJING XIONGMAO ELECTRONICS CO., LTD. Free format text: FORMER OWNER: NANJING HUAXIAN HIGH-TECH CO., LTD. Effective date: 20130731 |
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Effective date of registration: 20130731 Address after: 210002 Zhongshan East Road, Jiangsu, China, No. 301, No. Applicant after: Nanjing Xiongmao Electronics Co., Ltd. Address before: 210061 commercial building, room 413, hi tech Development Zone, Jiangsu, Nanjing Applicant before: Nanjing Huaxian High-Tech Co., Ltd. |
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Application publication date: 20130213 |