CN102830885A - Component of capacitive touch screen sensor - Google Patents
Component of capacitive touch screen sensor Download PDFInfo
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- CN102830885A CN102830885A CN2012103402784A CN201210340278A CN102830885A CN 102830885 A CN102830885 A CN 102830885A CN 2012103402784 A CN2012103402784 A CN 2012103402784A CN 201210340278 A CN201210340278 A CN 201210340278A CN 102830885 A CN102830885 A CN 102830885A
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Abstract
The invention discloses a component of a capacitive touch screen sensor, which comprises a first transparent insulated substrate and a second transparent insulated substrate. The first transparent insulated substrate and the second transparent insulated substrate are mutually bonded, one surface of the first transparent insulated substrate is provided with a corresponding first transparent conductive film, and one surface of the second transparent insulated substrate is provided with a corresponding second transparent conductive film; the first transparent conductive film comprises a plurality of first electrodes uniformly arranged in the width direction, and the second transparent conductive film comprises a plurality of second electrodes uniformly arranged in the length direction; each first electrode and each second electrode are respectively formed by serial connection of a plurality of corresponding first and second sensing units through transparent conductive wires; each first electrode is arranged simultaneously vertical to each second electrode; the first sensing units and the second sensing units are all I-shaped; and each I-shaped sensing unit consists of a first straight bar, a third straight bar and a second straight bar, wherein the first straight bars and the third straight bars are arranged in parallel, the second straight bars are arranged vertical to the first straight bars and the third straight bars, and the two ends of the second straight bars are respectively connected with central parts of the first straight bars and central parts of the third straight bars. The component of the capacitive touch screen sensor has the advantages of good anti-interference capability and high sensitivity of touch control.
Description
Technical field
The present invention relates to a kind of sensor, be specifically related to a kind of assembly of capacitive touch screen sensor, belong to the touch screen technology field.
Background technology
Existing touch-screen is widely used on the electronic device terminals such as game machine, mobile phone, GPS as input equipment, and said touch-screen comprises infrared-type touch-screen, surface acoustic wave type touch-screen, resistive touch screen and capacitive touch screen.Existing capacitive touch screen is that the capacitance difference that produces when utilizing human body contact conductive film is checked touch location, has realized multi-point touch and the amplification of being convenient to operate, dwindles, spinfunction, therefore, favored by people.Mostly the sensing unit that sensor had that existing capacitive touch screen comprises is rhombus; Cruciform, triangle, rectangle or hexagonal sensing unit are also arranged certainly; And the bad situation of homogeneity and consistance can appear in the sensing unit of above-mentioned shape in use, has shortcomings such as poor anti jamming capability, touch-control sensitivity be low.
Summary of the invention
The objective of the invention is: the assembly that the good but also capacitive touch screen sensor that touch-control is highly sensitive of a kind of not only antijamming capability is provided.
In order to achieve the above object, technical scheme of the present invention is: a kind of assembly of capacitive touch screen sensor, and its innovative point is:
A, comprise the first transparent insulation base material and the second transparent insulation base material; And the first transparent insulation base material is mutually bonding with the second transparent insulation base material; The one side of the said first transparent insulation base material is provided with first nesa coating, and the one side of the second transparent insulation base material is provided with second nesa coating;
First nesa coating of b, said first transparent insulation base material one side comprises first electrode that several are evenly arranged on the Width, and said first electrode is followed in series to form through the first electrically conducting transparent line by a plurality of first sensing units;
Second nesa coating of c, the said second transparent insulation base material another side comprises several and alongst goes up second electrode of evenly arranging that said second electrode is followed in series to form through the second electrically conducting transparent line by a plurality of second sensing units;
D, each first electrode are simultaneously vertical each other with each second electrode; First sensing unit of said first electrode and second sensing unit of second electrode all are sensing units of I shape shape;
The sensing unit of e, said I shape shape is by first vertical bar parallel to each other and the 3rd vertical bar; And constitute perpendicular to second vertical bar of first vertical bar and the 3rd vertical bar, and the two ends of second vertical bar are connected with the central part of first vertical bar and the central part of the 3rd vertical bar respectively.
In technique scheme, the width L ' of second sensing unit of the I shape shape of the width L of first sensing unit of the I shape shape of said first electrode and the ratio of length H and second electrode and being in equal proportions of length H '.
In technique scheme, the width L of first sensing unit of the I shape shape of said first electrode and the ratio of length H are 0.5 ~ 2; The width L ' of second sensing unit of the I shape shape of said second electrode is 0.5 ~ 2 with the ratio of length H '.
In technique scheme, the spacing between second sensing unit adjacent with alongst going up of second electrode of the spacing between adjacent first sensing unit on the Width of said first electrode equates.
In technique scheme, the spacing between adjacent first sensing unit on the Width of said first electrode is 4 ~ 10mm; The spacing that alongst goes up between the second adjacent sensing unit of said second electrode is 4 ~ 10mm.
In technique scheme, the said first electrically conducting transparent line is that the I shape central axis along first electrode is connected; The second electrically conducting transparent line is that the I shape central axis along second electrode is connected; The said first electrically conducting transparent line is vertical each other with the second electrically conducting transparent line, and the mid point a of the first electrically conducting transparent line
0Mid point b with the second electrically conducting transparent line
0Line a
0b
0, both perpendicular to the first electrically conducting transparent line, again perpendicular to the second electrically conducting transparent line.
In technique scheme, the said first transparent insulation base material and the second transparent insulation base material are both the transparent membrane base material, or clear glass substrate; Perhaps the first transparent insulation base material is the transparent membrane base material, and the second transparent insulation base material is a clear glass substrate.
In technique scheme, said first nesa coating and second nesa coating are indium tin oxide conductive films, or the graphene conductive film, or the antimony tin conducting film.
In technique scheme, second nesa coating of first nesa coating of the said first transparent insulation base material and the second transparent insulation base material in the same way, or for being reverse in opposite directions, perhaps.
The good effect that the present invention had is: because sensing unit of the present invention has adopted the sensing unit of I shape shape; And the both sides area of the sensing unit of I shape shape is bigger; And each first electrode is simultaneously vertical each other with each second electrode, makes the overlapping area of the win electrode and second electrode minimum; During use; Several first electrodes and several second electrodes are electrically connected with the corresponding link of soft drive circuit through silver slurry line respectively; Can make nesa coating form electrostatic field during touch-control; When being user's multi-point touch; First sensing unit through detecting several first electrodes of evenly arranging along Width respectively with second sensing unit of corresponding second electrode of alongst evenly arranging, the variation of the coupling capacitance of square crossing place is discerned user's position of touch with this each other; If during finger touch; Then coupling capacitance also can reduce, if the even move left and right of finger the time, then finger can be realized reducing uniformly or increasing with the contact area of the sensing unit of I shape shape; Reached the purpose of contact area even variation, made that the accuracy of position of touch identification is high; Thereby electric field resistance of the present invention is more even, has the strong and highly sensitive advantage of touch-control of antijamming capability.
Description of drawings
Fig. 1 is first kind of structural representation of the assembly of capacitive touch screen sensor of the present invention;
Fig. 2 is second kind of structural representation of the assembly of capacitive touch screen sensor of the present invention;
Fig. 3 is the third structural representation of the assembly of capacitive touch screen sensor of the present invention;
Fig. 4 is the 4th kind of structural representation of the assembly of capacitive touch screen sensor of the present invention;
Fig. 5 is first electrode of the present invention and the arrange synoptic diagram of second electrode on nesa coating;
Fig. 6 is the structural representation of first electrode among Fig. 5;
Fig. 7 is the structural representation of second electrode among Fig. 5;
Fig. 8 is the structural representation of the sensing unit of I shape shape of the present invention;
Fig. 9 is the A portion enlarged diagram of Fig. 5;
Figure 10 is the B portion enlarged diagram of Fig. 5;
The mathematics parabola model figure of Figure 11 during for touch-control of the present invention;
Figure 12 is the spatial placement synoptic diagram of the first electrically conducting transparent line of the present invention and the second electrically conducting transparent DNA mitochondrial DNA.
Embodiment
Below in conjunction with accompanying drawing and the embodiment that provides, the present invention is further described, but is not limited to this.
Shown in Fig. 1 ~ 10; A kind of assembly of capacitive touch screen sensor; Comprise the first transparent insulation base material 1 and the second transparent insulation base material 1 '; And the first transparent insulation base material 1 is mutually bonding with the second transparent insulation base material 1 ' through optical cement, and the one side that the one side of the said first transparent insulation base material 1 is provided with first nesa coating, 2, the second transparent insulation base materials 1 ' is provided with second nesa coating 2 '; First nesa coating 2 of the said first transparent insulation base material 1 one side comprises the first electrode 2-1 that several are evenly arranged on the Width, and the said first electrode 2-1 is followed in series to form through the first electrically conducting transparent line 2a by a plurality of first sensing unit 2-1-1; Second nesa coating 2 ' of the said second transparent insulation base material, 1 ' another side comprises several and alongst goes up the second electrode 2-2 that evenly arranges that the said second electrode 2-2 is followed in series to form through the second electrically conducting transparent line 2b by a plurality of second sensing unit 2-2-1; Each first electrode 2-1 is simultaneously vertical each other with each second electrode 2-2; The first sensing unit 2-1-1 of the said first electrode 2-1 and the second sensing unit 2-2-1 of the second electrode 2-2 all are sensing units of I shape shape; The sensing unit of said I shape shape is by first vertical bar 21 parallel to each other and the 3rd vertical bar 23; And constitute perpendicular to second vertical bar 22 of first vertical bar 21 and the 3rd vertical bar 23, and the two ends of second vertical bar 22 are connected with the central part of first vertical bar 21 and the central part of the 3rd vertical bar 23 respectively.
Like Fig. 9, shown in 10; In order to make the rationality of structure of the present invention; And the homogeneity that guarantees electric field resistance between the adjacent sensing unit, the second width L ' of sensing unit 2-2-1 of the I shape shape of the width L of the first sensing unit 2-1-1 of the I shape shape of the said first electrode 2-1 and the ratio of length H and the second electrode 2-2 and being in equal proportions of length H '.The width L of the first sensing unit 2-1-1 of the I shape shape of the said first electrode 2-1 and the ratio of length H are 0.5 ~ 2; The width L ' of the second sensing unit 2-2-1 of the I shape shape of the said second electrode 2-2 is 0.5 ~ 2 with the ratio of length H '.
Like Fig. 5,6, shown in 7; In order further to improve the homogeneity of electric field resistance between the adjacent sensing unit, the spacing between the second sensing unit 2-2-1 adjacent with alongst going up of the second electrode 2-2 of the spacing between the adjacent first sensing unit 2-1-1 on the Width of the said first electrode 2-1 equates.Spacing between the adjacent first sensing unit 2-1-1 on the Width of the said first electrode 2-1 is 4 ~ 10mm; The spacing that alongst goes up between the second adjacent sensing unit 2-2-1 of the said second electrode 2-2 is 4 ~ 10mm.
Like Fig. 5,6,7, shown in 12, the said first electrically conducting transparent line 2a is that the I shape central axis (being the central axis of the 3rd vertical bar 23 of the sensing unit of I shape shape) along the first electrode 2-1 is connected; The second electrically conducting transparent line 2b is that the I shape central axis (being the central axis of the 3rd vertical bar 23 of the sensing unit of I shape shape) along the second electrode 2-2 is connected; The said first electrically conducting transparent line 2a is vertical each other with the second electrically conducting transparent line 2b, and the mid point a of the first electrically conducting transparent line 2a
0Mid point b with the second electrically conducting transparent line 2b
0Line a
0b
0, both perpendicular to the first electrically conducting transparent line 2a, again perpendicular to the second electrically conducting transparent line 2b.The first electrically conducting transparent line 3a of the present invention and the second electrically conducting transparent line 3b and do not connect between the two not at grade.
The first transparent insulation base material 1 according to the invention and the second transparent insulation base material 1 ' are both the transparent membrane base material, or clear glass substrate; Perhaps the first transparent insulation base material 1 is the transparent membrane base material, and the second transparent insulation base material 1 ' is a clear glass substrate.Said first nesa coating 2 and second nesa coating 2 ' are indium tin oxide conductive films, or the graphene conductive film, or the antimony tin conducting film.
Like Fig. 1,2,3, shown in 4, first nesa coating 2 of the said first transparent insulation base material 1 and second nesa coating 2 ' of the second transparent insulation base material 1 ' in the same way, or for being reverse in opposite directions, perhaps.
Principle of work of the present invention: when the present invention uses; Several first electrodes 2-1 is handled the corresponding I/O mouth of integrated chip through silver slurry line with the MCU of soft drive circuit respectively with several second electrodes 2-2 to be electrically connected; When if finger does not touch nesa coating 2; Between the first sensing unit 2-1-1 of the said first electrode 2-1 adjacent I shape shape on the Width, the second electrode 2-2 alongst goes up the second sensing unit 2-2-1 of adjacent I shape shape; And first electrode 2-1 between the second sensing unit 2-2-1 of the first sensing unit 2-1-1 of the I shape shape of Width and second electrode 2-2 I shape shape alongst and ground, have stray capacitance, this electric capacity is defined as Cx; When if finger touch arrives nesa coating 2; Can produce a coupling capacitance Cf between the first sensing unit 2-1-1 of the first electrode 2-1 and the second sensing unit 2-2-1 of the second electrode 2-2 and the finger; The total capacitance that produced this moment is Ct; Be the total capacitance Ct=Cx+Cf that the finger touch capacitance plate is produced, the soft drive circuit goes out the difference Cf of the electric capacity of this position of finger touch capacitance plate through processing and detecting, thus the recognizing touch operation particular location.
It is to determine that to the contact area size of touch-screen its computing formula is Cf=ε * ε by finger touch that the second sensing unit 2-2-1 of each the I shape shape that alongst goes up that the first sensing unit 2-1-1 of each the I shape shape on the Width that the said first electrode 2-1 is included and the second electrode 2-2 are included produces electric capacity (electrode) size.*S/d，
Wherein, S: for the finger with electrode block over against area;
D: be the distance between finger and the electrode block;
ε。: be permittivity of vacuum, ε.=8.854 187 818 * 10-12 farads/rice (F/m);
ε is the specific inductive capacity of material, and the specific inductive capacity of commaterial is a fixed value;
This shows: capacitor C f be directly proportional over against area;
Because the first electrode 2-1 of the present invention connects through the first electrically conducting transparent line 2a along the first adjacent sensing unit 2-1-1 of Width; The second sensing unit 2-2-1 that the said second electrode 2-2 is alongst adjacent connects through the second electrically conducting transparent line 2b; Guaranteed the area minimum (as shown in Figure 5) of the first electrode 2-1 and the second electrode 2-2 two superimposed like this, and according to the formula of above-mentioned electric capacity: C=ε * ε.* S/d learns, when the value of inductance capacitance value Cf under constant situation, the value of stray capacitance Cx is more little; And according to the computing formula of signal to noise ratio (S/N ratio) d: d=Cf/Cx can know that it is big more that signal to noise ratio (S/N ratio) d can become; Therefore, the present invention compares with traditional capacitive touch sensors, has improved signal to noise ratio (S/N ratio) d greatly, makes touch function of the present invention sensitiveer, and antijamming capability is stronger.
Like Fig. 9, shown in 10; Two parts area of the width L ' of the width L of the first sensing unit 2-1-1 of the first electrode 2-1 of the present invention and the second sensing unit 2-2-1 of the second electrode 2-2 is bigger; And laterally evenly, the present invention and finger contact area have been increased greatly, when evenly moving about finger; Realized that contact area changes uniform purpose; Make the capacitance variation coordinate diagram of sensing unit (electrode) of I shape shape more near para-curve mathematical model shown in figure 11, guarantee that the assembly of capacitive touch screen sensor of the present invention is more accurate through the position coordinates that processor (MCU) calculates, the linearity is better; And reduced the resistance of whole sensing unit (electrode) passage; Principle according to the included MCU detection of soft drive circuit; The frequency that sensing unit (electrode) is discharged and recharged is: f=1/ (R*C); Wherein, R is the resistance value of sensing unit (electrode) passage, and C is the capacitance that sensing unit (electrode) produces; Under the constant situation of sensing unit (electrode) capacitance C; Resistance R is more little; The included MCU of soft drive circuit is fast more to the frequency f that sensing unit (electrode) discharges and recharges, and therefore, the reaction velocity of the capacitive touch screen of the sensing unit of the I shape shape that the present invention designed is just fast more.Traditional capacitive touch screen is all very harsh in ohmically requirement, and the resistance that a lot of producers require sensing unit (electrode) passage is below 10K; If the face resistance of the tin indium oxide of selecting for use (ITO) material is under the situation in 200 Europe; Much sensing unit (electrode) electrode of other figure (cruciform, triangle, bar shaped etc.) is not all realized this requirement; In order to realize the low requirement of single sensing unit (electrode) aisle resistance; Has only the low tin indium oxide of employing face resistance (ITO) conductive material; And low tin indium oxide (ITO) conductive material of general face resistance not only price is very high, and because low tin indium oxide (ITO) the conductive material wound easy to break of resistance, also increased technology difficulty greatly; And the I shape sensing unit (electrode) that the present invention designed also can satisfy the requirement of whole passage resistance below 10K can be implemented in the above conductive material in face resistance 200 Europe the time, therefore, greatly reduces its production cost.
The present invention has not only improved the reaction velocity of touch-control, and has reduced production cost.Compared with prior art can adopt the higher tin indium oxide of resistance (ITO) conductive material, that is because of high tin indium oxide (ITO) the conductive material wound not easy to break of resistance, so the present invention has also reduced the difficulty of explained hereafter.
The assembly of capacitive touch screen sensor of the present invention is not limited on the capacitive touch screen of various electronic equipments such as digital camera, navigating instrument, mobile phone, palm PC, also is applicable in other different techniques field on the required use capacitive touch screen.
Claims (9)
1. the assembly of a capacitive touch screen sensor is characterized in that:
A, comprise the first transparent insulation base material (1) and the second transparent insulation base material (1 '); And the first transparent insulation base material (1) is mutually bonding with the second transparent insulation base material (1 '); The one side of the said first transparent insulation base material (1) is provided with first nesa coating (2), and the one side of the second transparent insulation base material (1 ') is provided with second nesa coating (2 ');
First nesa coating (2) of b, the said first transparent insulation base material (1) one side comprises first electrode (2-1) that several are evenly arranged on the Width, and said first electrode (2-1) is followed in series to form through the first electrically conducting transparent line (2a) by a plurality of first sensing units (2-1-1);
Second nesa coating (2 ') of c, said second transparent insulation base material (the 1 ') another side comprises several and alongst goes up second electrode of evenly arranging (2-2) that said second electrode (2-2) is followed in series to form through the second electrically conducting transparent line (2b) by a plurality of second sensing units (2-2-1);
D, each first electrode (2-1) are vertical each other with each second electrode (2-2) simultaneously; First sensing unit (2-1-1) of said first electrode (2-1) and second sensing unit (2-2-1) of second electrode (2-2) all are sensing units of I shape shape;
The sensing unit of e, said I shape shape is by first vertical bar (21) parallel to each other and the 3rd vertical bar (23); And constitute perpendicular to second vertical bar (22) of first vertical bar (21) and the 3rd vertical bar (23), and the two ends of second vertical bar (22) are connected with the central part of first vertical bar (21) and the central part of the 3rd vertical bar (23) respectively.
2. the assembly of capacitive touch screen sensor according to claim 1 is characterized in that: the width L ' of second sensing unit (2-2-1) of the I shape shape of the width L of first sensing unit (2-1-1) of the I shape shape of said first electrode (2-1) and the ratio of length H and second electrode (2-2) and being in equal proportions of length H '.
3. the assembly of capacitive touch screen sensor according to claim 1 and 2, it is characterized in that: the width L of first sensing unit (2-1-1) of the I shape shape of said first electrode (2-1) and the ratio of length H are 0.5 ~ 2; The width L ' of second sensing unit (2-2-1) of the I shape shape of said second electrode (2-2) is 0.5 ~ 2 with the ratio of length H '.
4. the assembly of capacitive touch screen sensor according to claim 1 is characterized in that: the spacing between second sensing unit (2-2-1) adjacent with alongst going up of second electrode (2-2) of the spacing between adjacent first sensing unit (2-1-1) on the Width of said first electrode (2-1) equates.
5. according to the assembly of claim 1 or 4 described capacitive touch screen sensor, it is characterized in that: the spacing between adjacent first sensing unit (2-1-1) on the Width of said first electrode (2-1) is 4 ~ 10mm; The spacing that alongst goes up between adjacent second sensing unit (2-2-1) of said second electrode (2-2) is 4 ~ 10mm.
6. the assembly of capacitive touch screen sensor according to claim 1 is characterized in that: the said first electrically conducting transparent line (2a) is that the I shape central axis along first electrode (2-1) is connected; The second electrically conducting transparent line (2b) is that the I shape central axis along second electrode (2-2) is connected; The said first electrically conducting transparent line (2a) is vertical each other with the second electrically conducting transparent line (2b), and the mid point a of the first electrically conducting transparent line (2a)
0Mid point b with the second electrically conducting transparent line (2b)
0Line a
0b
0, both perpendicular to the first electrically conducting transparent line (2a), again perpendicular to the second electrically conducting transparent line (2b).
7. the assembly of capacitive touch screen sensor according to claim 1, it is characterized in that: the said first transparent insulation base material (1) and the second transparent insulation base material (1 ') are both the transparent membrane base material, or clear glass substrate; Perhaps the first transparent insulation base material (1) is the transparent membrane base material, and the second transparent insulation base material (1 ') is a clear glass substrate.
8. the assembly of capacitive touch screen sensor according to claim 1; It is characterized in that: said first nesa coating (2) and second nesa coating (2 ') are indium tin oxide conductive films; Or graphene conductive film, or antimony tin conducting film.
9. the assembly of capacitive touch screen sensor according to claim 1 is characterized in that: first nesa coating (2) of the said first transparent insulation base material (1) and second nesa coating (2 ') of the second transparent insulation base material (1 ') in the same way, or in opposite directions, or be oppositely.
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| CN103279239A (en) * | 2013-05-24 | 2013-09-04 | 重庆绿色智能技术研究院 | Grapheme capacitive touch screen |
| CN105094493A (en) * | 2015-09-06 | 2015-11-25 | 京东方科技集团股份有限公司 | Touch substrate and preparation method thereof, and display device |
| EP2948834A1 (en) * | 2013-05-02 | 2015-12-02 | The Boeing Company | Touch screens comprising graphene layers |
| WO2015192477A1 (en) * | 2014-06-17 | 2015-12-23 | 京东方科技集团股份有限公司 | Flexible printed circuit board, method for fabricating same, and capacitive touch display device |
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| CN102171630A (en) * | 2008-07-30 | 2011-08-31 | 弗莱克斯电子有限责任公司 | Glass substrate for capacitive touch panel and manufacturing method thereof |
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| EP2948834A1 (en) * | 2013-05-02 | 2015-12-02 | The Boeing Company | Touch screens comprising graphene layers |
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| CN105094493B (en) * | 2015-09-06 | 2017-12-08 | 京东方科技集团股份有限公司 | A kind of touch base plate and preparation method thereof, display device |
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Effective date of abandoning: 20160601 |
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| C20 | Patent right or utility model deemed to be abandoned or is abandoned |