CN102955633A - Single-layer multi-point capacitive touch screen - Google Patents
Single-layer multi-point capacitive touch screen Download PDFInfo
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- CN102955633A CN102955633A CN2012103126214A CN201210312621A CN102955633A CN 102955633 A CN102955633 A CN 102955633A CN 2012103126214 A CN2012103126214 A CN 2012103126214A CN 201210312621 A CN201210312621 A CN 201210312621A CN 102955633 A CN102955633 A CN 102955633A
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Abstract
The invention discloses a single-layer multi-point capacitive touch screen which comprises a plurality of driving electrodes and lead-out wires formed on a same electrode layer, and a plurality of induction electrodes which are complementary with the driving electrodes in shapes, are isolated from each other and are in non-electrical connection, wherein each driving electrode and one induction electrode which is complementary with the driving electrode in shape form a repeated electrode unit; each driving electrode consists of a frame and a K-shaped electrode, wherein the frame is formed by three sides of a rectangle, and the K-shaped electrode is formed by the sides between the other two sides; the induction electrodes positioned in the repeated electrode units in the same column are directly connected so as to form a plurality of columns of induction electrodes; and the driving electrodes in the repeated electrode units in the same row are connected on a flexible printed circuit board or a printed circuit board through the lead-out wires so as to form a plurality of rows of driving electrodes. Mutual capacitance change is formed between side walls of the driving electrodes and the induction electrodes before and after touch detection, so that the touch position is determined.
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.
But two-sided ITO capacitance touch screen need to form two ITO film plating layers at insulating medium, and carries out respectively etching, and manufacturing process is more, also so that production cost is higher.And single face ITO bridging type capacitive touch screen need to be to the electrode in the same plane connection of putting up a bridge, and the complexity of bridging technique is also so that production cost is higher.
Summary of the invention:
The object of the present invention is to provide a kind of individual layer ITO that only has, do not use traditional electrode bridging mode, can realize again the capacitance touch screen that multiple point touching detects.
Individual layer multiple spot capacitance 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, form the induction electrode that a plurality of drive electrodes and extension line thereof and nothing a plurality of and that the drive electrode shape complementarity is still isolated mutually are electrically connected.
The frame that drive electrode is comprised of three limits of rectangle, and and that limit between other two limits common electrode that forms " K " font form; And induction electrode is to be made of the electrode with the drive electrode shape complementarity.Part etched between drive electrode and the induction electrode forms induction channels.
Each drive electrode and consisted of one with the induction electrode of drive electrode shape complementarity and repeat electrode unit.Touch-screen is arranged by a plurality of repetition electrode units and is consisted of, and repeats electrode unit and is the arrangement of row shape, and form a plurality of row.
Each drive electrode that repeats in the electrode unit has an extension line in the rightmost side, every extension line is all guided the top of touch-screen into.The induction electrode that is arranged in the repetition electrode unit of same row directly links to each other, thereby forms a plurality of row induction electrodes; The drive electrode that is arranged in the repetition electrode unit of delegation connects at flexible PCB (FPC) or printed circuit board (PCB) (PCB) by extension line, thereby forms a plurality of row drive electrodes.
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.
Description of drawings:
Fig. 1 is the one-piece construction figure that the order discharging repeats the individual layer multiple spot capacitance touch screen of electrode unit;
Fig. 2 is the one-piece construction figure that symmetrical discharging repeats the individual layer multiple spot capacitance touch screen of electrode unit;
Fig. 3 is the partial enlarged drawing of a-quadrant among Fig. 1;
Fig. 4 is the single repetition electrode unit structure figure of drive electrode.
Specific embodiment:
Fig. 1 and Fig. 2 show the one-piece construction of the application's individual layer multiple spot capacitance touch screen, the application's individual layer multiple spot capacitance touch screen repeats electrode unit by many groups and forms, the one-piece construction of touch-screen when Fig. 1 attaches most importance to the arrangement of overlying electrode sequence of unit, the one-piece construction of touch-screen when Fig. 2 attaches most importance to the adjacent symmetric arrangement of overlying electrode unit.Each repeat electrode unit by drive electrode and with the drive electrode shape complementarity but the induction electrode without being electrically connected of isolation forms mutually.Among Fig. 1,1 is induction electrode, the induction electrode that is arranged in each repetition electrode unit of same row is directly to link to each other, and each drive electrode that repeats in electrode unit has a drive electrode extension line 2 in the rightmost side, and every extension line is all guided the top of touch-screen into.
Show the enlarged drawing of a-quadrant among Fig. 1 such as Fig. 3, shown several repetition electrode units among the figure.21 is the ground shielding wire, and 22 is induction electrode, and each row induction electrode links together, and 23,24,23 ', 24 ' is drive electrode; 23 and 23 ' connects to form the first row drive electrode by external flexible circuits plate (FPC); 24 and 24 ' connects to form the second row drive electrode by outside FPC.
Fig. 4 shows each structural drawing that repeats drive electrode and induction electrode in electrode unit.Can find out the frame that drive electrode is comprised of three limits of rectangle, and and that limit between other two limits common electrode that forms " K " font form; And induction electrode is to be made of the electrode with the drive electrode shape complementarity.Drive electrode and and induction electrode between be without being electrically connected, be induction channels in the middle of the two.
Can be found out that by Fig. 1-4 induction electrode that is arranged in the repetition electrode unit of same row directly links to each other, thereby forms a plurality of row induction electrodes; The drive electrode that is arranged in the repetition electrode unit of delegation connects (not shown) by extension line at flexible PCB (FPC) or printed circuit board (PCB) (PCB), thereby forms a plurality of row drive electrodes.
In Practical manufacturing, can 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, form a plurality of drive electrodes and extension line thereof and with the drive electrode shape complementarity but mutually isolation without the induction electrode that is electrically connected.
The frame that drive electrode is comprised of three limits of rectangle, and the electrode that middle that limit " K " font of common formation forms jointly with being positioned at other two limits; And induction electrode is to be made of the electrode with the drive electrode shape complementarity.Part etched between drive electrode and the induction electrode forms induction channels.
Each drive electrode and consisted of one with the induction electrode of drive electrode shape complementarity and repeat electrode unit.Touch-screen is arranged by a plurality of repetition electrode units and is consisted of, and repeats electrode unit and presses row shape repeated arrangement, and form a plurality of row.
Each drive electrode that repeats in the electrode unit has an extension line in the rightmost side, every extension line is all guided the top of touch-screen into.The induction electrode that is arranged in the repetition electrode unit of same row directly links to each other, thereby forms a plurality of row induction electrodes; The drive electrode that will be arranged in the repetition electrode unit of delegation connects at flexible PCB (FPC) or printed circuit board (PCB) (PCB) by extension line, thereby forms a plurality of row drive electrodes.
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:
The application's individual layer multiple spot capacitance touch screen only needs one deck ITO by realizing that at FPC drive electrode connects.Therefore, reduced one deck ITO plated film with respect to double-deck ITO; With respect to individual layer bridging structure decrease bridging technique, therefore simplified technique, reduced operation, effectively reduce cost.
Individual layer capacitance touch screen on the present market, for example cross one another triangle can not be realized true multiple point touching, can only accomplish that single-point adds gesture.And the application's individual layer multiple spot capacitance touch screen has a plurality of repetition electrode units of arranging by ranks, therefore can realize veritably the detection of multiple point touching.
Induction channels electrode and the adjacent area of driving channel electrode are larger, and the mutual capacitance that both form between the sidewall is larger, and capacitance variations was larger after hand touched.Therefore, the touch sensitivity of the application's individual layer multiple spot capacitance touch screen is higher.
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 (8)
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, form the induction electrode that a plurality of drive electrodes and extension line thereof and nothing a plurality of and that the drive electrode shape complementarity is still isolated mutually are electrically connected.
2. individual layer multiple spot capacitance touch screen as claimed in claim 1 is characterized in that:
The frame that drive electrode is comprised of three limits of rectangle, and and that limit between other two limits common electrode that forms " K " font form.
3. individual layer multiple spot capacitance touch screen as claimed in claim 1 is characterized in that:
Induction electrode is to be made of the electrode with the drive electrode shape complementarity.
4. individual layer multiple spot capacitance touch screen as claimed in claim 1 is characterized in that:
Each drive electrode and consisted of one with the induction electrode of drive electrode shape complementarity and repeat electrode unit; Touch-screen is arranged by a plurality of repetition electrode units and is consisted of, and repeats electrode unit and is row shape repeated arrangement, and form a plurality of row.
5. individual layer multiple spot capacitance touch screen as claimed in claim 4 is characterized in that:
Each drive electrode that repeats in the electrode unit has an extension line.
6. individual layer multiple spot capacitance touch screen as claimed in claim 4 is characterized in that:
The induction electrode that is arranged in the repetition electrode unit of same row directly links to each other, thereby forms a plurality of row induction electrodes.
7. individual layer multiple spot capacitance touch screen as claimed in claim 4 is characterized in that:
The drive electrode that is arranged in the repetition electrode unit of delegation connects at flexible PCB or printed circuit board (PCB) by extension line, thereby forms a plurality of row drive electrodes.
8. individual layer multiple spot capacitance touch screen as claimed in claim 4 is characterized in that:
Touch front and back by detecting, the position that touches is determined in the variation of the sidewall capacitance that forms between drive electrode and the induction electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210312621.4A CN102955633B (en) | 2012-08-29 | 2012-08-29 | A kind of monolayer multipoint capacitive touch screen |
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| CN201210312621.4A CN102955633B (en) | 2012-08-29 | 2012-08-29 | A kind of monolayer multipoint capacitive touch screen |
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| CN102955633A true CN102955633A (en) | 2013-03-06 |
| CN102955633B CN102955633B (en) | 2017-05-31 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102855041A (en) * | 2012-08-29 | 2013-01-02 | 北京集创北方科技有限公司 | Single-layer multi-point capacitive touch screen |
| CN103218095A (en) * | 2013-03-25 | 2013-07-24 | 南昌欧菲光科技有限公司 | Single-layer multipoint capacitive touch screen |
| CN103257778A (en) * | 2013-05-15 | 2013-08-21 | 南昌欧菲光显示技术有限公司 | Single-layer multi-point capacitive touch screen |
| CN106933400A (en) * | 2015-12-31 | 2017-07-07 | 辛纳普蒂克斯公司 | Single layer sensor pattern and method for sensing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102855041A (en) * | 2012-08-29 | 2013-01-02 | 北京集创北方科技有限公司 | Single-layer multi-point capacitive touch screen |
| CN102855041B (en) * | 2012-08-29 | 2016-01-13 | 北京集创北方科技有限公司 | A kind of monolayer multipoint capacitive touch screen |
| CN103218095A (en) * | 2013-03-25 | 2013-07-24 | 南昌欧菲光科技有限公司 | Single-layer multipoint capacitive touch screen |
| CN103257778A (en) * | 2013-05-15 | 2013-08-21 | 南昌欧菲光显示技术有限公司 | Single-layer multi-point capacitive touch screen |
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| CN102955633B (en) | 2017-05-31 |
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Address after: 100088, No. 4, No. 31 middle third ring road, Haidian District, Beijing, building No. 13 (Teste building) Applicant after: BEIJING CHIPONE NORTH TECHNOLOGY CO., LTD. Address before: 100088, No. 4, No. 31 middle third ring road, Haidian District, Beijing, building No. 13 (Teste building) Applicant before: Beijing Jichuang Northern Technology Co.,Ltd. |
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