CN102968225A - Capacitive touch screen having single-layer bridge-striding structure - Google Patents
Capacitive touch screen having single-layer bridge-striding structure Download PDFInfo
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- CN102968225A CN102968225A CN2012103126267A CN201210312626A CN102968225A CN 102968225 A CN102968225 A CN 102968225A CN 2012103126267 A CN2012103126267 A CN 2012103126267A CN 201210312626 A CN201210312626 A CN 201210312626A CN 102968225 A CN102968225 A CN 102968225A
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Abstract
The invention relates to a capacitive touch screen having a single-layer bridge-striding structure, excellent waterproof property and strong anti-jamming capability. The capacitive touch screen comprises a transparent insulating medium and an indium tin oxide coating film layer formed on one surface of the transparent insulating medium, wherein the indium tin oxide coating film layer is etched; a plurality of driving electrodes and induction electrodes which are complementary with the shape of the driving electrodes, but are insulated from each other and are free from electric connection are arranged; the induction electrodes and the driving electrodes are alternately arrayed in rows; the induction electrodes have cross-shaped structural patterns; the induction electrodes in the same row are connected through a bridge-striding metal wire so as to form row induction electrodes; the driving electrodes have the structural patterns which are complementary with the shape of the cross-shaped structural patterns of the induction electrodes; and the driving electrodes in the same rowline are directly connected so as to form row line driving electrodes. When the touch is detected, the position of the touch is confirmed according to the change in inductive capacitance formed between the driving electrodes and the induction electrodes before and after the touch detection.
Description
Technical field:
The present invention relates to touch-screen, relate in particular to the structure of the active touch-screen of mutual appearance formula.
Background technology:
In present touch-screen field, mainly contain resistive touch screen, photo-electric touch-screen, surface acoustic wave touch screen and capacitive touch screen.
Resistive touch screen is still leading products in the market, but the structure of the double layer substrate of resistive touch screen, so that touch-screen and display panel overlap when using, the display qualities such as the brightness that the reflective very impact of touch-screen shows, contrast, color saturation, whole display quality is descended greatly, and strengthen display panel brightness backlight, power consumption is increased; There is the problem of location drift in analog electric resistance touch screen, need to often calibrate; In addition, the working method of resistive touch screen electrode contact makes touch screen from being damaged easily, and often use can cause the lost of life of touch-screen.
Infrared-type touch-screen and surface acoustic wave touch screen can not affect display quality, but infrared-type touch-screen and ultrasonic type touch-screen cost are high, water droplet and dust all can affect the reliability of touch-screen work, particularly infrared-type touch-screen and ultrasonic type touch-screen mechanism are complicated, power consumption is large, so that infrared-type touch-screen and ultrasonic type touch-screen can't be applied on the portable product substantially.
At present, long and occuping market main flow gradually of capacitive touch screen, life-span high, wear-resistant with its transmittance.The principle of capacitive touch screen is by measuring finger or other touch control objects to the impact of coupling capacitance between touch screen electrode, actual is by measuring finger or other touch control objects to the impact that discharges and recharges of the electric capacity of touch screen electrode formation, surveying finger or the position of other touch control objects on touch-screen.
The electrode of capacitive touch screen is general to adopt transparent tin indium oxide (ITO) material to form.Type by the electric capacity that detects is different, and capacitive touch screen is divided into two kinds of self-capacitance touch screen and mutual capacitance touchscreens: self-capacitance touch screen by detect touch before and after the variation of electrode pair earth capacitance determine the touch location of touch control object on touch-screen; Mutual capacitance touchscreens changes by electric capacity between the two arrays of electrodes of detection touch front and back determines the touch location of touch control object on touch-screen.
The ITO electrode implementation of the multiple spot capacitance touch screen that generally uses on the Vehicles Collected from Market mainly contains two-sided and single face is put up a bridge two kinds, and some also can increase screen layer.Two-sided ITO plates respectively the ITO film plating layer on the two sides of insulating medium (such as transparent glass substrate or clear PET film), and forms respectively induction electrode and the drive electrode of square crossing on two ITO film plating layers by etch processes; The single face bridging refers to that the electrode that will be formed at one of them direction of individual layer ITO film plating layer of insulating medium one side by the mode of putting up a bridge connects and the electrode on another direction is connected, thus the electrode on the both direction that the formation transverse and longitudinal is intersected.
Fig. 1 is the structure of mutual capacitance type capacitance touch screen of the prior art and touches front and back mutual capacitance change synoptic diagram.1 is insulation dielectric layer among Fig. 1; 2 is top crown, is generally induction electrode; 3 are finger; 4 are the electric capacity between finger and the induction electrode; 5 is the magnetic line of force; 6 is bottom crown, generally is drive electrode.
Induction electrode and drive electrode that double-deck touch-screen touch capacitor array is intersected by transverse and longitudinal form, and Fig. 1 is that one of them induction electrode and drive electrode point of crossing form the electric capacity synoptic diagram.The magnetic line of force that bottom layer driving electrode and upper strata induction electrode form is shown in the left figure of Fig. 1, and the overlap capacitance of formation size is C
SigThe magnetic line of force that flows to the induction electrode upper surface such as right figure hand touch rear portion principle flows on the finger, and magnetic line of force sum is substantially constant and be proportional to capacitance size, and then the electric capacity between induction electrode and the drive electrode will reduce C
t, namely from C
SigBecome C
Sig-C
tC
tSize characterizes and touches intensity, C
tAt C
SigMiddle proportion is called effective permittivity.
Summary of the invention:
The object of the present invention is to provide a kind of have individual layer bridge structure, the capacitance touch screen that water resistance is good, antijamming capability is strong.
Individual layer bridge structure capacitive touch-screen of the present invention solves the problems of the technologies described above by the following technical programs:
Use sputtering process to form one deck ITO film plating layer at transparent insulation medium (such as transparent glass substrate, clear PET film etc.), again the ITO film plating layer is carried out etch processes, but the induction electrode that forms a plurality of drive electrodes and be electrically connected with the nothing of drive electrode shape complementarity mutually insulated, induction electrode and drive electrode are arranged alternately with each other by row.Induction electrode is cross structure plan, is interconnected to constitute the row induction electrode by the bridge metal wire between the same row induction electrode; Drive electrode has the structure plan with the cross structure plan shape complementarity of induction electrode, directly connects and composes capable drive electrode with a plurality of drive electrodes of delegation.
Description of drawings:
Fig. 1 is the structure of mutual capacitance type capacitance touch screen of the prior art and touches front and back mutual capacitance change synoptic diagram;
Fig. 2 is the sectional view of mutual capacitance type individual layer bridge capacitance touch screen bridge part among the application;
Fig. 3 is the one-piece construction synoptic diagram of the application's individual layer bridge capacitance touch screen;
Fig. 4 is the partial enlarged drawing of a-quadrant among Fig. 3.
Specific embodiment:
Fig. 2 is the sectional view of the application's mutual capacitance type individual layer bridge capacitance touch screen bridge part.21 is the bridge metal connecting line, and 22 is induction electrode, and 23 is drive electrode.Induction electrode is connected with the bridge metal wire by the punching connection, by bridge metal and hole induction electrode is connected to each other; Drive electrode and bridge intermetallic have the insulation dielectric isolation.
The inductance capacitance of individual layer bridge structure capacitive touch-screen is comprised of following two parts: the overlap capacitance between bridge metal and lower floor's drive electrode and the sidewall capacitance between induction electrode and drive electrode.
Fig. 3 is the one-piece construction synoptic diagram of the application's individual layer bridge capacitance touch screen.As can be seen from Figure 3 the application's individual layer bridge capacitance touch screen has induction electrode 32 and the drive electrode 33 of the shape complementarity that forms at same ITO layer, that mutually insulated is without being electrically connected between induction electrode 32 and the drive electrode 33, induction electrode 32 and drive electrode 33 are arranged alternately with each other by row, interconnect by bridge metal wire 31 between the same row induction electrode 32.
Fig. 4 is the partial enlarged drawing of a-quadrant among Fig. 3.Induction electrode 32 is cross structure plan among Fig. 4, can find out between the same row induction electrode 32 to be interconnected to constitute the row induction electrode by bridge metal wire 31; The structure plan of drive electrode 33 is with the cross structure plan shape complementarity of induction electrode 32, directly connects and composes capable drive electrode with a plurality of drive electrodes 33 of delegation.
In the mill, at first use sputtering process to form one deck ITO film plating layer at transparent insulation medium (such as transparent glass substrate, clear PET film etc.), again the ITO film plating layer is carried out etch processes, but the induction electrode that forms a plurality of drive electrodes and be electrically connected with the nothing of drive electrode shape complementarity mutually insulated, induction electrode and drive electrode are arranged alternately with each other by row.Induction electrode is cross structure plan; Drive electrode has the structure plan with the cross structure plan shape complementarity of induction electrode, directly connects and composes capable drive electrode with a plurality of drive electrodes of delegation.To interconnect by the bridge metal wire between the same row induction electrode at last, form the row induction electrode.
When detecting multiple point touching, to each row drive electrode, difference is the load driver signal successively, mutual capacitance between row induction electrode and the corresponding line drive electrode sidewall when touching by detecting, and and touch that mutual capacitance compares between prostatitis induction electrode and the corresponding line drive electrode sidewall, the point that obtains the mutual capacitance variation is the touch point, and determines the position of a plurality of touch points.
In sum, can find out that the application's individual layer multiple spot capacitance touch screen has the following advantages:
Cross induction electrode reduces with respect to rhombus and square induction electrode area, and water resistance is better.Because the induction electrode area diminishes, thereby the magnetic line of force that forms between drive electrode and the induction electrode diminishes at the area that touch screen surface forms, and the water droplet of onesize conduction is on less than the impact of the small size magnetic line of force, therefore, when touch screen surface has water droplet, the induction electrode that water droplet causes and the variation C of the coupling capacitance between the drive electrode
tLess, be not easy to make the touch detection unit mistake that water droplet is used as the touch point, thereby improved the waterproof ability of capacitance touch screen.
Because the induction electrode area of the interference that lcd screen causes and touch-screen is directly related, the induction electrode area of touch-screen more receives greatly to be interfered easily.And the induction electrode width of individual layer bridge capacitance touch screen is narrower among the application, thereby has reduced the area of induction electrode, has improved touch-screen at the antijamming capability that does not have in the screen layer situation.Therefore, the application's individual layer bridge structure can improve the touch-screen antijamming capability.
Above content is the further description of the present invention being done in conjunction with concrete preferred implementation, can not assert that implementation of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (6)
1. individual layer multiple spot capacitance touch screen comprises the transparent insulation medium and is formed at indium oxide layer tin film plating layer on face of transparent insulation medium, it is characterized in that:
Described indium oxide coating layer is carried out etch processes, but a plurality of drive electrode and with drive electrode shape complementarity mutually insulated without the induction electrode that is electrically connected, induction electrode and drive electrode are arranged alternately with each other by row.
2. individual layer multiple spot capacitance touch screen as claimed in claim 1 is characterized in that:
Induction electrode is cross structure plan.
3. individual layer multiple spot capacitance touch screen as claimed in claim 1 is characterized in that:
Drive electrode has the structure plan with the cross structure plan shape complementarity of induction electrode.
4. individual layer multiple spot capacitance touch screen as claimed in claim 1 is characterized in that:
A plurality of drive electrodes with delegation directly connect and compose capable drive electrode.
5. individual layer multiple spot capacitance touch screen as claimed in claim 1 is characterized in that:
Be interconnected to constitute the row induction electrode by the bridge metal wire between the same row induction electrode.
6. individual layer multiple spot capacitance touch screen as claimed in claim 1 is characterized in that:
When detection touches, touch front and back by detecting, the variation of the inductance capacitance that forms between drive electrode and the induction electrode, definite position that touches.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012103126267A CN102968225A (en) | 2012-08-29 | 2012-08-29 | Capacitive touch screen having single-layer bridge-striding structure |
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| CN2012103126267A CN102968225A (en) | 2012-08-29 | 2012-08-29 | Capacitive touch screen having single-layer bridge-striding structure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103309509A (en) * | 2013-06-04 | 2013-09-18 | 苏州欧菲光科技有限公司 | Conductive film |
| CN104345998A (en) * | 2013-07-24 | 2015-02-11 | 联咏科技股份有限公司 | Drive induction method of single layer multipoint mutual capacitive touch screen |
| CN104375735A (en) * | 2014-12-05 | 2015-02-25 | 合肥鑫晟光电科技有限公司 | Touch panel and display device |
| CN107678587A (en) * | 2017-09-27 | 2018-02-09 | 深圳市骏达光电股份有限公司 | Touch sensitive layer and preparation method thereof |
| CN114035712A (en) * | 2021-11-17 | 2022-02-11 | 广东示润科技有限公司 | Thin film type capacitive screen |
| CN114096941A (en) * | 2019-07-03 | 2022-02-25 | 华为技术有限公司 | Touch screen and control method for touch screen |
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| CN101441545A (en) * | 2008-12-08 | 2009-05-27 | 中国南玻集团股份有限公司 | Capacitance type touch control screen and manufacturing method thereof |
| CN101833404A (en) * | 2009-12-24 | 2010-09-15 | 友达光电股份有限公司 | Touch display device and touch device |
| CN102109940A (en) * | 2009-12-29 | 2011-06-29 | 三星电子株式会社 | Capacitive sensing device and method for manufacturing same and capacitive sensing system |
| CN102314272A (en) * | 2010-10-26 | 2012-01-11 | 敦泰科技(深圳)有限公司 | Capacitance type touch screen with bi-layer structure |
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2012
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| CN101441545A (en) * | 2008-12-08 | 2009-05-27 | 中国南玻集团股份有限公司 | Capacitance type touch control screen and manufacturing method thereof |
| CN101833404A (en) * | 2009-12-24 | 2010-09-15 | 友达光电股份有限公司 | Touch display device and touch device |
| CN102109940A (en) * | 2009-12-29 | 2011-06-29 | 三星电子株式会社 | Capacitive sensing device and method for manufacturing same and capacitive sensing system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103309509A (en) * | 2013-06-04 | 2013-09-18 | 苏州欧菲光科技有限公司 | Conductive film |
| CN104345998A (en) * | 2013-07-24 | 2015-02-11 | 联咏科技股份有限公司 | Drive induction method of single layer multipoint mutual capacitive touch screen |
| CN104375735A (en) * | 2014-12-05 | 2015-02-25 | 合肥鑫晟光电科技有限公司 | Touch panel and display device |
| US9703437B2 (en) | 2014-12-05 | 2017-07-11 | Boe Technology Group Co., Ltd. | Touch panel and display device |
| CN104375735B (en) * | 2014-12-05 | 2018-04-10 | 合肥鑫晟光电科技有限公司 | Contact panel and display device |
| EP3229116A4 (en) * | 2014-12-05 | 2018-07-25 | Boe Technology Group Co. Ltd. | Touch panel and display device |
| CN107678587A (en) * | 2017-09-27 | 2018-02-09 | 深圳市骏达光电股份有限公司 | Touch sensitive layer and preparation method thereof |
| CN114096941A (en) * | 2019-07-03 | 2022-02-25 | 华为技术有限公司 | Touch screen and control method for touch screen |
| CN114096941B (en) * | 2019-07-03 | 2024-01-05 | 华为技术有限公司 | Touch screen and control method for touch screen |
| CN114035712A (en) * | 2021-11-17 | 2022-02-11 | 广东示润科技有限公司 | Thin film type capacitive screen |
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Application publication date: 20130313 |