CN103257778A - Single-layer multi-point capacitive touch screen - Google Patents
Single-layer multi-point capacitive touch screen Download PDFInfo
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- CN103257778A CN103257778A CN2013101797473A CN201310179747A CN103257778A CN 103257778 A CN103257778 A CN 103257778A CN 2013101797473 A CN2013101797473 A CN 2013101797473A CN 201310179747 A CN201310179747 A CN 201310179747A CN 103257778 A CN103257778 A CN 103257778A
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Abstract
The invention relates to a single-layer multi-point capacitive touch screen comprising a touch panel provided with a visible area. The visible area is provided with a plurality of columns electrodes, each column of electrodes comprise first electrodes and a plurality of second electrode units arranged opposite to the first electrodes, and the second electrode units are arranged in sequence in the direction of the columns of the electrodes. Each second electrode unit is connected externally with the visible area through an independent electrode wire, each column of electrodes comprise at least one sub-area, electrode wires of the second electrode units in the same sub-area are led out of the visible area in the same direction, and capacitances among all the second electrode units and the first electrodes increase gradually in the leading direction of the electrode wires. According to the single-layer multi-point capacitive touch screen, the capacitances among all the second electrode units and the first electrodes increase gradually in the leading direction of the wires of the second electrode units, so that charging time and discharging time of all the second electrode units are relatively balanced.
Description
Technical field
The present invention relates to the touch-control field, particularly relate to a kind of individual layer multiple spot capacitance touch screen.
Background technology
Contact panel is also referred to as touch-screen, be widely used in the electronic product miscellaneous, such as GPS (GPS), mobile phone (cellular phone) and the multiple information processing terminal (ATM, mobile communication terminal) etc., to replace traditional input media, as keyboard and mouse.
At present, adopt vacuum evaporation or magnetron sputtering mode that transparent conductive material tin indium oxide (ITO) is coated on usually and form transparent conductive body on PET or the glass substrate to be applied to capacitance touch screen.Common touch panel component comprises one or more layers emission/sensing signal electrode usually, the substrate of a slice support electrode, shield assemblies and have another plate bases of scratch resistance, anti-dazzle, anti-fingerprint/water, antireflection etc. is made this type of contact panel and need be made good component joint to two together respectively.Can make the thickness of contact panel thicker if use the substrate contain the multilayer sensing electrode to add the manufacture of two-layer substrate that another sheet has shield assemblies and have a substrate of scratch resistance, anti-dazzle, anti-fingerprint/water, antireflection etc., and owing to comprise multilayer sensing electrode substrate and need to combine after the layering manufacturing, complex manufacturing increases the cementing agent cost that makes up between substrate and the substrate.
The induction electrode of conventional monolayers multiple spot capacitance touch screen and drive electrode are over against area and the distance the same size of value almost, cause the induction electrode of contact conductor terminal away from the non-visible area in top to be electrically connected to the contact conductor terminal by relatively long lead-in wire like this, because the ITO lead resistance is bigger, each induction electrode is also different to top lead terminal row's resistance value R, cause each induction electrode to discharge and recharge time t ≈ RC (wherein, C is electric capacity between induction electrode and drive electrode) inconsistent, make poor-performings such as sensitivity of touch screen.
Summary of the invention
Based on this, be necessary to propose comparatively balanced individual layer multiple spot capacitance touch screen of a kind of each electrode charge and discharge time.
A kind of individual layer multiple spot capacitance touch screen, comprise the contact panel that is provided with visible area, described visible area is provided with plural electrode array, each row electrode comprises second electrode unit that first electrode and a plurality of and described first electrode are oppositely arranged, described a plurality of second electrode unit is arranged in order along the direction of the row of described electrode, each second electrode unit is connected to described visible area outside by contact conductor independently, each row electrode comprises at least one subregion, the contact conductor of second electrode unit in the same subregion is drawn from described visible area along equidirectional, drawing on the direction of described contact conductor, the electric capacity between each second electrode unit and first electrode progressively increases.
Therein among embodiment, draw on the direction at described contact conductor, the size of each second electrode unit progressively increases, and makes the spacing of each second electrode unit and first electrode progressively increase or constant, and respectively second electrode unit and first interelectrodely progressively increases over against area simultaneously.
Among embodiment, described first electrode comprises a plurality of first electrode units that directly link to each other therein, corresponding second electrode unit of each first electrode unit.
Among embodiment, described first electrode unit surrounds described second electrode unit, the shape complementarity of the shape of described first electrode unit and described second electrode unit therein.
Therein among embodiment, described first electrode is strip and it offers a plurality of openings, described a plurality of second electrode unit alternative arrangement is in the described first electrode both sides, described second electrode unit has the detecting part that stretches in the described opening, draw on the direction at described contact conductor, the detecting part size of each second electrode unit progressively increases.
Therein among embodiment, described first electrode comprises a plurality of intervals and first electrode unit that is arranged in parallel, described a plurality of first electrode unit couples together in an end, and each second electrode unit has and a plurality ofly be arranged in parallel and can insert detecting part between adjacent two first electrode units.
Therein among embodiment, the surface of described first electrode unit is the plane or is wavy, the shape complementarity on the surface of the shape on the surface of the detecting part of described second electrode unit and described first electrode unit, the surface of described second electrode unit are the plane or are wavy.
Among embodiment, in each row electrode, the contact conductor of the second all electrode units is all drawn from the top of described visible area in the upward direction, or all draws from the bottom of described visible area in a downward direction therein.
Therein among embodiment, each row electrode is divided into upper and lower two subregions, wherein go up the contact conductor of second electrode unit in the subregion and all draw from the top of described visible area in the upward direction, the contact conductor of second electrode unit in the described subregion is down all drawn from the bottom of described visible area in a downward direction.
Among embodiment, the second electrode unit position in the described plural electrode array is corresponding also to form multirow second electrode, with the second electrode unit shape and measure-alike in delegation's second electrode therein.
Above-mentioned individual layer multiple spot capacitance touch screen, drawing on the direction of the lead-in wire of second electrode unit, each second electrode unit progressively increases with the first interelectrode electric capacity, makes the comparatively equilibrium of the time that discharges and recharges of each second electrode unit.
Description of drawings
Fig. 1 discharges and recharges the time method schematic diagram for balanced each induction electrode;
Fig. 2 is the schematic diagram of the electrod-array of individual layer multiple spot capacitance touch screen that can balanced each electrode charge and discharge time;
Fig. 3 is the structural representation of the individual layer multiple spot capacitance touch screen of embodiment one;
Fig. 4 is the electrod-array synoptic diagram of the individual layer multiple spot capacitance touch screen of embodiment two;
Fig. 5 is the electrod-array synoptic diagram of the individual layer multiple spot capacitance touch screen of embodiment three;
Fig. 6 is synoptic diagram that repeats electrode unit among the embodiment three;
Fig. 7 is the electrod-array synoptic diagram of the individual layer multiple spot capacitance touch screen of embodiment four;
Fig. 8 is synoptic diagram that repeats electrode unit among the embodiment four;
Fig. 9 is the electrod-array synoptic diagram of the individual layer multiple spot capacitance touch screen of embodiment five;
Figure 10 is synoptic diagram that repeats electrode unit among the embodiment five.
Embodiment
Discharge and recharge time t ≈ RC as can be known by the induction electrode unit, the performance difference that the electrode unit R increase that causes owing to the increase of contact conductor length for balanced each row induction electrode unit causes, can make the induction electrode unit discharge and recharge the balance that time t ≈ RC tries one's best by the size that changes C, thereby obtain more satisfactory even performance.
Please refer to Fig. 1, the public electrode unit 140 and the induction electrode unit 150 that are arranged on the substrate 130 are to be made by transparent conductive material, and thickness is generally 100～500 Ethylmercurichlorendimides.According to the electricity rule, after electrifying electrodes, can form an electric field between two electrodes when two, the side of electrode also is the little electric field of an equivalence.The side of two electrodes also constitutes a plane-parallel capacitor, and according to computing formula C=(ε the S)/d of parallel plate capacitor, wherein, ε: medium specific inductive capacity between pole plate, S: pole plate is over against area, d: polar plate spacing; Want to change the size of C, can realize by adjusting S or d, maybe can be by adjusting S simultaneously and d realizes.
Thus, the main design of the individual layer multiple spot capacitance touch screen of present embodiment is: by changing the size of induction electrode unit, reach the purpose of adjusting S and d simultaneously, and then change the size of C, make each induction electrode unit discharge and recharge the balance that time t ≈ RC tries one's best.
Please refer to Fig. 2, show the schematic diagram of the electrod-array of individual layer multiple spot capacitance touch screen that can balanced each electrode charge and discharge time.
The visible area of this individual layer multiple spot capacitance touch screen is provided with two row electrodes, can certainly be multiple row, and this sentences two and classifies example as and describe.Each row electrode comprises first electrode 210 and a plurality of second electrode unit 220 that places first electrode, 210 1 sides and be arranged in order of a strip, and each second electrode unit 220 is drawn from the bottom of visible area downwards by contact conductor 230 independently.On the direction that contact conductor 230 is drawn, namely among Fig. 2 on the downward direction shown in the arrow X, each second electrode unit, 220 size increases gradually.Like this, from top to bottom, the spacing d of each second electrode unit and first electrode 210 progressively reduces, i.e. d1 among Fig. 2〉d2〉d3〉d4; Meanwhile, 210 at each second electrode unit 220 and first electrode progressively increases over against area S.According to formula C=(ε S)/d, from top to bottom, S progressively increases, d progressively reduces, and therefore the C between each second electrode unit 220 and first electrode 210 progressively increases, and from top to bottom, contact conductor length and the resistance value R of each second electrode unit obviously reduce gradually, therefore, according to t ≈ RC, the time that discharges and recharges of each second electrode unit is comparatively balanced.
Need point out that among Fig. 2, from top to bottom, each second electrode unit 220 progressively increases over against area S with 210 at first electrode, respectively the spacing d of second electrode unit and first electrode 210 progressively reduces.This spacing d also can be a definite value, and according to formula C=(ε S)/d, C also progressively increases.In addition, be appreciated that contact conductor 230 also can upwards draw from the top of visible area, at this moment, then from the bottom to top, each second electrode unit, 220 size increases gradually, and is just opposite when also namely drawing downwards with contact conductor 230.
In addition, among Fig. 2, the contact conductor of a plurality of second electrode units 220 draw the direction unanimity.Also can be that draw at the make progress top of visible area of the contact conductor of part second electrode unit 220, the contact conductor of a part of second electrode unit 220 be upwards drawn from the bottom of visible area in addition.Particularly, each row electrode is divided into upper and lower two subregions, and the contact conductor of second electrode unit in the last subregion is all drawn from the top of visible area, and on the direction from the bottom to top, each second electrode unit, 220 size increases gradually; The contact conductor of second electrode unit is all drawn from the bottom of visible area in the following subregion, and on the direction from top to bottom, each second electrode unit, 220 size increases gradually.In other words, size that we can say second electrode unit 220 increases from the middle to both ends successively.
In addition, as shown in Figure 2, second electrode unit, 220 positions in the plural electrode array are corresponding and to form multirow second electrode also be sensing electrode, with second electrode unit, 220 shapes in delegation's sensing electrode and measure-alike.Can guarantee the time that the discharges and recharges unanimity of second electrode unit of each row so better, make touch-screen obtain more preferably evenly performance.
Further specify below in conjunction with specific embodiment.
Embodiment one
Please refer to Fig. 3, single-point multilayer touch-screen is provided with visible area 310, is provided with plural electrode array 320 in the visible area 310.Each row electrode 320 comprises a plurality of first electrode units 322 and a plurality of second electrode unit 324.
In the present embodiment, each first electrode unit 322 surrounds second electrode unit 324, the two shape complementarity, and wherein second electrode unit 324 is irregular shape.A plurality of first electrode units 322 directly link to each other to form a public electrode.Second electrode unit 324 is isolated from each other by first electrode unit 322, draws by contact conductor 330 then, to be communicated with control chip.
In the present embodiment, each electrode 320 is divided into upper and lower two subregions.As shown in Figure 3, among the last subregion A, the contact conductor 330 of second electrode unit 324 all make progress (namely along direction shown in the arrow X) draw from visible area 310 tops, therefore on direction shown in the X, the wire length that each second electrode unit 324 needs reduces gradually.On direction shown in the arrow X, the size of each second electrode unit 324 increases gradually, each second electrode unit 324 reduces gradually with the spacing d of corresponding first electrode unit 322 like this, be d1〉d2〉d3, simultaneously 322 of each second electrode unit 324 and first electrode units progressively increases over against area S, according to formula C=(ε S)/d, therefore the capacitor C between each second electrode unit 324 and first electrode unit 322 progressively increases, and from bottom to top, contact conductor length and the resistance value R of each second electrode unit reduce gradually, therefore, according to t ≈ RC, the time that discharges and recharges of each second electrode unit is comparatively balanced.
Among the following subregion B, the contact conductor 330 of second electrode unit 324 all downward (namely along direction shown in the arrow Y) is drawn from visible area 310 bottoms, on direction shown in the arrow Y, the size of each second electrode unit 324 increases gradually, each second electrode unit 324 reduces gradually with the spacing d of corresponding first electrode unit 322 like this, be d1〉d2〉d3, simultaneously 322 of each second electrode unit and first electrode units progressively increases over against area S, according to formula C=(ε S)/d, therefore the capacitor C between each second electrode unit 324 and first electrode unit 322 progressively increases, and from top to bottom, contact conductor length and the resistance value R of each second electrode unit 324 obviously reduce gradually, therefore, according to formula t ≈ RC, the time that discharges and recharges of each second electrode unit is comparatively balanced.
Second electrode unit, 324 positions in the plural electrode array 320 are corresponding and to form multirow second electrode be sensing electrode, with second electrode unit, 324 shapes in delegation's sensing electrode and measure-alike.Can guarantee the time that the discharges and recharges unanimity of second electrode unit 324 of each row so better, make touch-screen obtain more preferably evenly performance.
Embodiment two
Please refer to Fig. 4, for ease of explanation, the contact panel that do not draw among the figure, visible area only illustrates two row electrodes simultaneously.Each row electrode 420 comprises a plurality of first electrode units 422 and a plurality of second electrode unit 424.
In the present embodiment, each first electrode unit 422 surrounds second electrode unit 424, the two shape complementarity, and wherein second electrode unit 424 roughly is X-shaped.A plurality of first electrode units 422 directly link to each other to form a public electrode.Second electrode unit 424 is isolated from each other by first electrode unit 422, draws by contact conductor 430 then, to be communicated with control chip.
Similar with embodiment one, electrode 420 is divided into subregion A and following subregion B.Among the last subregion A, the contact conductor 430 of second electrode unit 424 all make progress (namely along direction shown in the arrow X) draw from the visible area top, therefore on direction shown in the X, the wire length that each second electrode unit 424 needs reduces gradually.On direction shown in the arrow X, the size of each second electrode unit 424 increases gradually, each second electrode unit 424 reduces gradually with the spacing of corresponding first electrode unit 422 like this, be d1〉d2〉d3〉d4, simultaneously 422 of each second electrode unit and first electrode units progressively increases over against area S, according to formula C=(ε S)/d, the capacitor C that each second electrode unit and first electrode unit are 422 progressively increases, according to formula t ≈ RC, it is all comparatively balanced that each second electrode unit discharges and recharges the time.
It may be noted that, on direction shown in the X, the size of each second electrode unit 424 increases gradually, and does not mean that, the size of each second electrode unit 424 must be that one of a ratio is big, as shown in Figure 4, among the last subregion A, be divided into four part P1, P2, P3 and P4 again, wherein the P1 part is to the P4 part, the size of second electrode unit progressively increases, but second electrode unit that the P1 part itself has two consistent size.Equally, P2, P3 and P4 also have second electrode unit of two consistent size.With a part, as two second electrode units in the P1 part, because at a distance of nearer, it is less relatively to discharge and recharge time difference.Therefore above-mentioned set-up mode still can make the comparatively equilibrium of the time that discharges and recharges of second electrode unit 424 of each row.
Among the following subregion B, the increasing gradually along Y-direction of each second electrode unit 424, also namely with embodiment one in following subregion B in the arrangement of each second electrode unit 324 identical.
Second electrode unit, 424 positions in the plural electrode array 420 are corresponding and to form multirow second electrode be sensing electrode, with second electrode unit, 424 shapes in delegation's sensing electrode and measure-alike.Can guarantee the time that the discharges and recharges unanimity of second electrode unit 424 of each row so better, make touch-screen obtain more preferably evenly performance.
Embodiment three
Please refer to Fig. 5 and Fig. 6, for ease of explanation, only illustrate the synoptic diagram of interior part first electrode of visible area and the second electrode unit array.
In the present embodiment, first electrode 520 is on strip and its and offers a plurality of openings 522 along bearing of trend, and a plurality of second electrode unit, 530 alternative arrangement are in first electrode, 520 both sides.Each second electrode unit 530 has a detecting part 532 that stretches into the strip in the opening 522.The contact conductor 540 of second electrode unit 530 (direction shown in arrow X among Fig. 5) is all in the upward direction drawn, and therefore on direction shown in the X, the wire length that each second electrode unit 530 needs reduces gradually.
Mostly interleavedly in the opening 522 be located at first electrode, 520 both sides, but the top of first electrode 520 also offers opening.Detecting part 532 also mates with the shape of opening 522, after detecting part 532 inserts, can be understood as opening 522 and basically detecting part 532 is surrounded or semi-surrounding.
Shown in the arrow X on the direction, the size of the detecting part 532 of second electrode unit 530 progressively increases, and makes the spacing d of second electrode unit, 530 to first electrodes 520 progressively reduce, i.e. d1 among the figure in Fig. 5〉d2〉d3, and the two progressively increase over against area.According to formula C=(ε S)/d, capacitor C progressively increases between second electrode unit 530 and first electrode 520, and according to formula t ≈ RC, the time that discharges and recharges of each second electrode unit is comparatively balanced.
Embodiment four
Please refer to Fig. 7 and Fig. 8, in the present embodiment, each first electrode comprises a plurality of intervals and first electrode unit 722 that is arranged in parallel.A plurality of first electrode units 722 couple together in an end, constitute a public electrode.Each second electrode unit 730 all has a plurality of detecting parts that be arranged in parallel 732, and a plurality of detecting parts 732 all are inserted between adjacent two first electrode units 722.
As shown in Figure 7, in the present embodiment, the contact conductor 740 of second electrode unit 730 (direction shown in the arrow X among Fig. 7) is in the upward direction drawn from the visible area top, so on direction shown in the X, the wire length that each second electrode unit 730 needs reduces gradually.On direction shown in the X, detecting part 732 sizes of each second electrode unit 730 progressively increase, and make the spacing d of each second electrode unit, 730 to first electrode unit 722 progressively reduce, i.e. d1 among Fig. 7〉d2〉d3, and the two progressively increase over against area.According to formula C=(ε S)/d, capacitor C progressively increases between second electrode unit 730 and first electrode unit 722, and according to formula t ≈ RC, the time that discharges and recharges of each second electrode unit is comparatively balanced.
In the present embodiment, the shape of detecting part 732 and first electrode unit, 722 shape complementarities, wherein the surface of detecting part 732 is the plane, the surface of first electrode unit 722 is the plane.
Embodiment five
Please refer to Fig. 9 and Figure 10, present embodiment and enforcement four basically identicals, the contact conductor 940 of second electrode unit 930 (direction shown in the arrow X among Fig. 7) is in the upward direction drawn from the visible area top, so on direction shown in the X, the wire length that each second electrode unit 930 needs reduces gradually.On direction shown in the X, detecting part 932 sizes of each second electrode unit 930 progressively increase, and make the spacing d of each second electrode unit, 930 to first electrode unit 922 progressively reduce, i.e. d1 among the figure〉d2〉d3, and the two progressively increase over against area.According to formula C=(ε S)/d, capacitor C progressively increases between second electrode unit 930 and first electrode unit 922, and according to formula t ≈ RC, the time that discharges and recharges of each second electrode unit is comparatively balanced.
In the present embodiment, the surface configuration complementation of the surface configuration of detecting part 932 and first electrode unit 922, the two all is wavy.In addition, please refer to Fig. 9, in the present embodiment, first electrode unit 922 is directly connected to each other, but is not to be all to connect at same end, but is connected to each other in two ends alternately, finally forms a public electrode.
Above in the description of each embodiment, for ease of explanation, first electrode that first electrode unit is constituted claims public electrode (being drive electrode), and second electrode of second electrode unit formation is called sensing electrode.But need to prove, sensing electrode and drive electrode itself there is no differentiation, first, second electrode that first electrode unit and second electrode unit constitute specifically uses as the electrode of the sort of type, be the control chip that depends on IC manufacturer, so the description in above-described embodiment should not constitute the restriction to the technology of the present invention thought.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. individual layer multiple spot capacitance touch screen, comprise the contact panel that is provided with visible area, described visible area is provided with plural electrode array, each row electrode comprises second electrode unit that first electrode and a plurality of and described first electrode are oppositely arranged, described a plurality of second electrode unit is arranged in order along the direction of the row of described electrode, each second electrode unit is connected to described visible area outside by contact conductor independently, it is characterized in that, each row electrode comprises at least one subregion, the contact conductor of second electrode unit in the same subregion is drawn from described visible area along equidirectional, drawing on the direction of described contact conductor, the electric capacity between each second electrode unit and first electrode progressively increases.
2. individual layer multiple spot capacitance touch screen according to claim 1, it is characterized in that, draw on the direction at described contact conductor, the size of each second electrode unit progressively increases, make the spacing of each second electrode unit and first electrode progressively increase or constant, respectively second electrode unit and first interelectrodely progressively increases over against area simultaneously.
3. individual layer multiple spot capacitance touch screen according to claim 1 is characterized in that, described first electrode comprises a plurality of first electrode units that directly link to each other, corresponding second electrode unit of each first electrode unit.
4. individual layer multiple spot capacitance touch screen according to claim 3 is characterized in that, described first electrode unit surrounds described second electrode unit, the shape complementarity of the shape of described first electrode unit and described second electrode unit.
5. individual layer multiple spot capacitance touch screen according to claim 1, it is characterized in that, described first electrode is strip and it offers a plurality of openings, described a plurality of second electrode unit alternative arrangement is in the described first electrode both sides, described second electrode unit has the detecting part that stretches in the described opening, draw on the direction at described contact conductor, the detecting part size of each second electrode unit progressively increases.
6. individual layer multiple spot capacitance touch screen according to claim 1, it is characterized in that, described first electrode comprises a plurality of intervals and first electrode unit that is arranged in parallel, described a plurality of first electrode unit couples together in an end, and each second electrode unit has and a plurality ofly be arranged in parallel and can insert detecting part between adjacent two first electrode units.
7. individual layer multiple spot capacitance touch screen according to claim 6, it is characterized in that, the surface of described first electrode unit is the plane or is wavy, the shape complementarity on the surface of the shape on the surface of the detecting part of described second electrode unit and described first electrode unit, the surface of described second electrode unit are the plane or are wavy.
8. according to the described individual layer multiple spot of arbitrary claim capacitance touch screen in the claim 1 to 7, it is characterized in that, in each row electrode, the contact conductor of the second all electrode units is all drawn from the top of described visible area in the upward direction, or all draws from the bottom of described visible area in a downward direction.
9. according to the described individual layer multiple spot of arbitrary claim capacitance touch screen in the claim 1 to 7, it is characterized in that, each row electrode is divided into upper and lower two subregions, wherein go up the contact conductor of second electrode unit in the subregion and all draw from the top of described visible area in the upward direction, the contact conductor of second electrode unit in the described subregion is down all drawn from the bottom of described visible area in a downward direction.
10. according to the described individual layer multiple spot of arbitrary claim capacitance touch screen in the claim 1 to 7, it is characterized in that, the second electrode unit position in the described plural electrode array is corresponding and form multirow second electrode, with the second electrode unit shape and measure-alike in delegation's second electrode.
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