CN102375633A - Multi-touch structure of surface capacitive touch panel and method thereof - Google Patents
Multi-touch structure of surface capacitive touch panel and method thereof Download PDFInfo
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- CN102375633A CN102375633A CN2010102624410A CN201010262441A CN102375633A CN 102375633 A CN102375633 A CN 102375633A CN 2010102624410 A CN2010102624410 A CN 2010102624410A CN 201010262441 A CN201010262441 A CN 201010262441A CN 102375633 A CN102375633 A CN 102375633A
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Abstract
The invention relates to a surface capacitive touch panel, in particular to the surface capacitive touch panel structure which can simultaneously determine different contacts and a method thereof. The touch panel at least comprises a transparent substrate, a transparent conducting layer and an electrode pattern layer, wherein the electrode pattern layer is formed by at least one first X-side electrode, at least one second X-side electrode, at least one first Y-side electrode and at least one second Y-side electrode in a rectangle to be around the periphery of the surface of the transparent conducting layer. The invention is characterized in that: each opposite X-side electrode and each opposite Y-side electrode are respectively distributed in a way that impedance is to the same side increased progressively or decreased progressively in equal difference or equal ratio, so that a gradient phenomenon of the touch panel is generated through the same horizontal or vertical contact impedance, mutual offset of current, which occurs when two contacts move, can be prevented, coordinates X and Y of different contacts on the touch panel can be determined, and multiple-contact requirement of the surface capacitive touch panel can be met.
Description
Technical field
The invention belongs to a kind of technical field of contact panel; Particularly be meant a kind ofly to produce the gradient phenomenons and can prevent the contact panel of the surface capacitance type that electric current is cancelled each other, so that this contact panel has the function that multiconductor is judged in same level or vertical different contact resistance.
Background technology
In the electronic equipment development history, the appearance of inputting interfaces such as keyboard, mouse and Trackpad has solved the problem of input control.But, these inputting interfaces take up space not little, and for example, half volume of notebook computer or mobile phone is all occupied by keyboard.If can economize the lower keyboard space, natural energy promotes the product portability, and the most feasible mode is exactly directly to operate with touch control manner in panel.Contact panel can replace most of keyboards, mouse function really, and invests user more intuition, operating experience easily; Substitute keyboard with bigger panel, can also design more frivolous, fashion moulding; Add and adopt the cured plate technique fully, need not worry the problem of mechanical component faults such as keyboard, pulley.
Distinguish contact panel from know-why, it can be divided into resistive technologies contact panel, capacitance technology contact panel, infrared technology contact panel, surface acoustic wave technique contact panel, electromagnetic technique contact panel and optical technology contact panel etc.The wherein accurate positioning of electric resistance touch-control panel, but its price is quite high, and be afraid of to scrape rapid wear.Infrared technology contact panel cheap, but its housing is frangible, is easy to generate light and disturbs distortion under the curved surface situation; And surface acoustic wave touch panel has solved the various defectives of touch screen in the past, and is clear uprising, is suitable for various occasions, and shortcoming is that water droplet, the dust of panel surface can make the blunt of contact panel change, does not even work.Therefore at present having concurrently under durability, cost, reaction velocity and the convenience considering of contact panel exploitation, electric resistance touch-control panel and capacitance type touch-control panel become the main force's product on the market.
In recent years, receive the intimate touch-control interface of smart mobile phone, let smart mobile phone have an opportunity to win more people's favor.And the appearance of multi-point touch function (like smart mobile phones such as iPhone, HTC) more causes the new revolution of using the interface, and the user can use the electronic product of using this multi-point touch panel with more intuitive mode.
But, release for some time at aforementioned multi-point touch control type smart mobile phone, a barrage of similar concept product occurs on the market but do not see yet, can seem and in the practice of technology, exist quite high together threshold really.On market, there is multiple touch technology at present, has only capacitive technologies to be expected to realize function of multi-spot touch.See further that again capacitance touching control can be divided into surface capacitance type (Surface Capacitive) and two kinds of practices of projected capacitive (Projective Capacitive) again;
With the technological practice of surface capacitance type wherein, as shown in Figure 1 its is a conventional surface capacitance type touch-control panel.14 of the hardened layers that this contact panel 10 is used by a transparency carrier 11, a transparency conducting layer 12, an electrode pattern layer 13 and an insulation protection constitute; Wherein this transparency carrier 11 can be glass, plastic cement; This electrode pattern layer 13 is by forming periphery that the two relative X lateral electrodes 131 that surround into rectangle and two relative Y lateral electrodes 132 are formed at this transparency conducting layer 12 partly, in order to compensate the curve distribution of the electric field on this transparency conducting layer 12.In addition; As shown in Figure 2; Each joins four corners of this contact panel 10 with an even outer lead 151,152,153,154, exchanges sensing signal (AC1, AC2, AC3, AC4) in order to receive one respectively, uses for the position that measures a contact P on the contact panel 10.When real work, these exchange sensing signal AC1, AC2, AC3, AC4 is identical ac square wave or the string wave voltage signal of amplitude size, and respectively connecting this moment respectively has an electric current I 1, I2, I3 and I4 to pass through on the outer conductor 151,152,153,154.By measuring current change quantity Δ I1, Δ I2, Δ I3 and the Δ I4 before this contact P occurs and when occurring that each connects outer conductor 151,152,153,154, the X of P position, this contact, Y coordinate just can be calculated according to following formula:
X＝(ΔI3+ΔI4-ΔI1-ΔI2)/(ΔI1+ΔI2+ΔI3+ΔI4)
Y＝(ΔI1+ΔI4-ΔI3-ΔI2)/(ΔI1+ΔI2+ΔI3+ΔI4)
Therefore on operational architecture; System can produce a uniform electric field at transparency conducting layer 12; When the electric capacity charge effects can appear in the finger touch panel, form capacitive coupling between each transparent X of panel top electrode patterned layer 13, Y lateral electrode 131,132 and finger, and then produce capacitance variations; Controller just can calculate contact position according to size of current as long as measure four corner strength of current.
Because it causes electrostatic field to change through finger contact contact panel and detects, wherein the single-point touch capacitive technologies is quite ripe in fact, just surface capacitance type (Surface Capacitive).This Technical Architecture is more simple, only needs a transparency conducting layer 12 to realize, and this transparency conducting layer 12 do not need special sense channel design, and periphery only need connect 4 leads 151,152,153,154 and ground wire gets final product, and production difficulty and cost all can reduce.Its maximum restriction then is; It can't realize the multi-point touch function, mainly is because it is when the real work industry, as imposing on two simultaneously with upper contact; And when carrying out the gesture motion between two contacts (like convergent-divergent, rotation or dilatory etc.); It possibly cancel out each other the electric current of output because of two finger positions are corresponding shape, causes the erroneous judgement of its contact or action, so existing surface capacitance type contact panel is not the desirable technique of multi-point touch.
Also therefore.Projected capacitive (Projected Capacitive) technology has just become to realize the hope place of multi-point touch.Like Fig. 3 is the three-dimensional exploded view of a traditional projected capacitive touch panel.This capacitance type touch-control panel 20 is coincided from lower to upper by a transparency carrier 21, an X transparent electrode pattern layer 22, a transparent dielectric layer 23 and a Y transparent electrode pattern layer 24 and forms; Wherein each forms the sensing patterns 25 (sensing element) of row/row on X and the Y transparent electrode pattern layer 22,24; In order to cooperate with other element for judging the existence of one or more contact on this contact panel 20, the sensing patterns 25 of X and Y transparent electrode pattern layer 22,24 and join wherein with a plurality of external wires 28.
Compared to surface capacitance type, projected capacitive is adopted single or multiple lift patternization (patterned) and is formed staggered sensing patterns 25 (sensing element) matrix of row/row.Thus, in the whole use life cycle, do not need just can obtain accurate position of touch, and can use thicker overlayer, can accomplish the multi-point touch operation yet through calibration.But this still belongs to suitable advanced person and complicated technology on market; The sensing mode of its screen must adopt matrix (Matrix) scan pattern of multicolumn (column) and multiple row (row); Can be divided into shaft staggered formula (Axis Intersect) again but and all contact locate modes (All Points Addressable, APA) two kinds of sensing screens.More or less freely in the former practice, also lower for the requirement of computing and storage resources, if but want to realize accurate 2 touch-controls location, still adopt the detection technology of APA.
But whichsoever; With regard to present manufacturing technology; It all need use higher manufacturing technology, so its manufacturing cost is high, is not inconsistent the demand of actual use; Receive the influence of its computing, storage resources deficiency and sensing accuracy what is more; The present volume production that can only be used for the small size panel of projected capacitive touch panel, in using, the industry (like notebook computer, industrial computer, POS system, ATM, medical equipment, monitor, game machine or the like) of large size panel, still can't effectively satisfy the demand of its multi-point touch.
In other words; Because it is simple and easy and be easy to process and the production advantage cheaply that the surface capacitance type contact panel has framework; Simultaneously surface capacitance type touch-control product has more dustproof, fire prevention, scratch resistant, strong durable and have an advantage such as high-res; So if can develop surface capacitance type contact panel, then can have the convenience of use and the effect of low cost concurrently with multiconductor decision-making function.
Summary of the invention
Therefore; Fundamental purpose of the present invention is at the multi-touch method that a kind of surface capacitance type contact panel is provided; It can let contact panel produce the gradient phenomenon in same level or vertical contact resistance; Prevent that the electric current when move two contacts from cancelling each other, and then can judge the coordinate of contacts different on the contact panel effectively, to satisfy the multiconductor demand of surface capacitance type contact panel.
Again, another fundamental purpose of the present invention is to provide a kind of multi-point touch structure of surface capacitance type contact panel, significantly simplifying the formation of multipoint mode contact panel, and reduces its manufacture difficulty, and can effectively reduce its cost.
In view of the above, the present invention comes concrete aforesaid purpose and the effect of realizing mainly through following technological means;
This contact panel is made up of a transparency carrier, a transparency conducting layer and an electrode pattern layer at least; Wherein electrode pattern layer is to be arranged with a relative at least one X lateral electrode and at least one the 2nd X lateral electrode in the upper and lower edge of contact panel; Electrode pattern layer is to be arranged with a relative at least one Y lateral electrode and an at least one Y lateral electrode in the left and right edge of contact panel again; And first and second X lateral electrode and first and second Y lateral electrode form around the contact panel surface periphery with rectangle; Wherein first and second X lateral electrode is impedance with equal difference or geometric ratio mode and successively decrease or increase progressively; First and second Y lateral electrode and be impedance and successively decrease with equal difference or geometric ratio mode or increase progressively, and the end of first and second X lateral electrode and first and second Y lateral electrode again be electrically connected respectively one supply to measure output current lead.
A kind of multi-touch method of surface capacitance type contact panel; It is used for a surface capacitance type contact panel; This contact panel has a transparency carrier, a transparency conducting layer and an electrode pattern layer at least and coincides relatively and form; And one or most first and second X lateral electrode that electrode pattern layer has an opposing parallel with one or first and second Y lateral electrode of majority of opposing parallel with rectangle around the layer at transparent layer periphery; The impedance when move same level or vertical contact of this contact panel produces the phenomenon of gradient, and electric current is unlikely when making two different contacts move cancels each other.
With this; Through the concrete realization of aforementioned techniques means of the present invention, let contact panel of the present invention produce the gradient phenomenon in same level or vertical contact resistance, cancel each other in convergent-divergent relatively, rotation or dilatory moving process with the electric current of effective two different contacts; Thereby can judge the coordinate of contacts different on the contact panel effectively; Satisfying the multiconductor demand of surface capacitance type contact panel, and can significantly simplify the formation of multipoint mode contact panel, to reduce its manufacture difficulty and cost.
Description of drawings
Fig. 1 is the perspective exploded view of the known concise and to the point framework of surface capacitance type contact panel;
Fig. 2 is that known surface capacitance type contact panel is in receiving sensing signal to judge the synoptic diagram of contact position;
Fig. 3 is the perspective exploded view of the known concise and to the point framework of projected capacitive touch panel;
Fig. 4 is the touch panel structure provided perspective exploded view of surface capacitance type of the present invention;
Fig. 5 is the touch panel structure provided floor map of surface capacitance type of the present invention;
Fig. 6 A～Fig. 6 F is the electrode plane synoptic diagram of electrode pattern layer of the present invention, supplies its different embodiments of explanation;
Fig. 7 is that surface capacitance type contact panel of the present invention is in receiving sensing signal to judge the synoptic diagram of multi-contact positions;
Fig. 8 is surface capacitance type contact panel of the present invention is made table of corrections when receiving sensing signal a correction contact position synoptic diagram;
Fig. 9 is the floor map of touch panel structure provided another embodiment of surface capacitance type of the present invention; And
Figure 10 is the touch panel structure provided floor map of an embodiment again of surface capacitance type of the present invention.
[main element symbol description]
10 contact panels, 11 transparency carriers
12 transparency conducting layers, 13 electrode pattern layer
131 X lateral electrodes, 132 Y lateral electrodes
14 hardened layers, 151 leads
152 leads, 153 leads
154 leads, 20 contact panels
21 transparency carriers, 22 X transparent electrode pattern layers
23 transparent dielectric layers, 24 Y transparent electrode pattern layers
25 sensing patterns, 28 leads
50 contact panels, 51 transparency carriers
52 transparency conducting layers, 54 hardened layers
60 electrode pattern layer 61 an X lateral electrode
611 the one X lateral electrodes 612 an X lateral electrode
62 the 2nd X lateral electrodes 621 the 2nd X lateral electrode
622 the 2nd X lateral electrodes 63 a Y lateral electrode
631 the one Y lateral electrodes 632 a Y lateral electrode
64 the 2nd Y lateral electrodes 641 the 2nd Y lateral electrode
642 the 2nd Y lateral electrodes, 65 leads
651 leads, 652 leads
66 leads, 661 leads
662 leads, 67 leads
671 leads, 672 leads
68 leads, 681 leads
682 leads, 69 connecting portions
691 connecting portions, 692 connecting portions
Embodiment
For making your juror can further understand formation of the present invention, characteristic and other purposes, below be the preferred embodiment of lifting the present invention, and cooperate graphic detailed description as after, let simultaneously be familiar with this art can practical implementation.
The present invention is a kind of multi-point touch structure and method thereof of surface capacitance type contact panel; In illustrative specific embodiment of the present invention of the figure that encloses and the member thereof; All about preceding and back, left and the right side, top and bottom, top and bottom and level and vertical reference; Only be used for conveniently describing, and unrestricted the present invention, also non-its member be limited to any position or direction in space.Specified size in accompanying drawing and the instructions, when can be in not leaving scope of patent protection of the present invention, design according to a particular embodiment of the invention and demand and change.
The present invention is a kind of surface capacitance type contact panel; As shown in Figure 4; This contact panel 50 is made up of 54 of the hardened layers that a transparency carrier 51, a transparency conducting layer 52, an electrode pattern layer 60 and an insulation protection are used at least; Wherein electrode pattern layer 60 is to form around contact panel 50 transparency conducting layers 52 surface periphery with the essence rectangle; And the impedance at the edge of electrode pattern layer 60 each opposing parallel is laid with equal difference or geometric ratio mode increasing or decreasing to homonymy, makes contact panel 50 produce the phenomenon of gradient in same level or vertical contact resistance, prevents that the electric current of electrode pattern layer 60 outputs when move two contacts from cancelling each other; And utilize the controller (not shown) to measure four corner strength of current, just can calculate X coordinate, the Y coordinate of trying to achieve two different contacts according to size of current;
As for the detailed formation of preferred embodiment of the present invention, then like Fig. 4, shown in Figure 5, wherein transparency carrier 51 can be clear glass, clear plastic, and the indium oxide tin film of transparency conducting layer 52 optional self-induced transparencys (Indium Tin Oxide; ITO), antimony tin film (Antimony doped Tin Oxide; ATO), be selected from silicon dioxide (SiO as for 54 of hardened layers
2) etc.; With protection contact panel 50; Electrode pattern layer 60 is formed around contact panel 50 transparency conducting layers 52 surface periphery with rectangle by one or most first and second Y lateral electrode 63,64 of one or most first and second X lateral electrode 61,62 and opposing parallel of opposing parallel again; And because of the workspace that surrounds into the essence rectangle on the contact panel 50, first and second X lateral electrode 61,62 of this electrode pattern layer 60 and the impedance of first and second Y lateral electrode 63,64 are designed to respectively lay with equal difference or geometric ratio mode increasing or decreasing to homonymy in the electrode pattern layer 60;
And the most preferred embodiment of electrode pattern layer 60 of the present invention is: it is that upper and lower both side edges in contact panel 50 is arranged with one the one X lateral electrode 61 and one the 2nd X lateral electrode 62; And the impedance of first and second X lateral electrode 61,62 is equal difference or geometric ratio mode and successively decreases or increase progressively; And modes such as its change slope capable of using (like Fig. 5), width (like Fig. 6 A), spacing (like Fig. 6 B), area (like Fig. 6 C), the number of turns (like Fig. 6 D), material (like Fig. 6 E), thickness (like Fig. 6 F) or its mixing; Reach and make its impedance can equal difference or geometric ratio mode and the physical condition that successively decreases or increase progressively; Most preferred embodiment of the present invention then makes the slope of this first and second X lateral electrode 61,62 with the homonymy convergent extension to the right of equal difference mode, reaches the purpose that its impedance is successively decreased with equal difference.Again electrode pattern layer 60 and in the left and right two ends of contact panel 50 fate is provided with one the one Y lateral electrode 63 and one the 2nd Y lateral electrode 64; And the impedance of first and second Y lateral electrode 63,64 is equal difference or geometric ratio mode and successively decreases or increase progressively; And modes such as its change slope capable of using (like Fig. 5), width (like Fig. 6 A), spacing (like Fig. 6 B), area (like Fig. 6 C), the number of turns (like Fig. 6 D), material (like Fig. 6 E), thickness (like Fig. 6 F) or its mixing; Reach and make its impedance can equal difference or geometric ratio mode and the physical condition that successively decreases or increase progressively; And the most preferred embodiment of this first and second Y lateral electrode 63,64 of the present invention is to make its slope extend with the downward homonymy convergent of equal difference mode, reaches the purpose that its impedance is successively decreased with equal difference;
First and second X lateral electrode 61,62 and 63,64 of first and second Y lateral electrodes of electrode pattern layer 60 are to be formed on transparency conducting layer 52 peripheries of contact panel 50 with technology such as etching, screen painting, electric transfer printings in addition; Moreover first and second X lateral electrode 61,62 of electrode pattern layer 60 and first and second Y lateral electrode 63,64 and be selected from conductive material; Like carbon paste, elargol, copper glue or its mixing etc.; The present invention is a main embodiment with the carbon paste, makes electrode pattern layer 60 of the present invention be formed at contact panel 50 surface periphery with the screen painting mode;
Moreover; Former electrodes patterned layer 60 can be four exit points (as shown in Figure 5) or eight exit points (as shown in Figure 9); The present invention is a main embodiment with four exit points; The one X lateral electrode 61 of this electrode pattern layer 60 and the opposite endpoint of a Y lateral electrode 63 be provided with jointly one be used to measure voltage, electric current lead 65; And the opposite endpoint of a Y lateral electrode 63 and the 2nd X lateral electrode 62 be provided with jointly one be used to measure voltage, electric current lead 66; Again the opposite endpoint of the 2nd X lateral electrode 62 and the 2nd Y lateral electrode 64 be provided with jointly one be used to measure voltage, electric current lead 67; As for the opposite endpoint of the 2nd a Y lateral electrode 64 and a Y lateral electrode 63 be provided with jointly one be used to measure voltage, electric current lead 68, aforementioned wire 65,66,67 and 68 is selected from conductive material, mixes like carbon paste, elargol, copper glue or its etc.; The present invention is main embodiment with the elargol; And lead 65,66,67 and 68 and be laid in the nonclient area surface of contact panel 50 with the screen painting mode are again on the contact panel 50 and have one and supply lead 65,66,67 and 68 connecting portion 69 laid of side points in addition, for a controller (not shown) of lead 65,66,67 and the electric serial connection contact panel 50 of 68 difference;
With this; Can utilize first and second X lateral electrode 61,62 of its electrode pattern layer 60 and the impedance of first and second Y lateral electrode 63,64 to lay with equal difference or geometric ratio mode increasing or decreasing to homonymy; Make contact panel 50 produce the phenomenon of gradient in same level or vertical contact resistance; The electric current that prevents electrode pattern layer 60 outputs when move two contacts is cancelled each other, and group formation one surface capacitance type is touch panel structure provided.
And about practice of the present invention; Then still please referring to shown in Figure 7; When real work; Each joins first and second X lateral electrode 61,62 of the electrode pattern layer 60 of this contact panel 50 and first and second Y lateral electrode 63,64 relative four corners with an even outer lead 65,66,67,68; Exchange sensing signal (AC1, AC2, AC3 and AC4) in order to receive one respectively, for the position usefulness that measures on the contact panel 50 two different contact PA, PB, can carry out two different contact PA of gesture operation, the position of PB is an example to calculate:
At first, on the workspace of contact panel 50, set equidistance such as plural number and be laid with check point, and the X wheelbase of each adjacent check point and Y wheelbase be the equidistance shape respectively, as shown in Figure 8, the present invention is a main embodiment with 25, and check point is respectively defined as P1～P25;
Then, utilize sensing member of the same area (area when its size is touched for the simulation finger) to place aforementioned corrected point P1～P25 last in regular turn, and measure the current value of each check point P1～P25 respectively, and try to achieve the central point of adjacent in twos check point P1～P25; And check point P1～P25 current value through aforementioned measurement; And the energy out of the ordinary (being electric current summation out of the ordinary) of first and second X lateral electrode 61,62 and first and second Y lateral electrode 63,64 of gross energy (being the electric current summation) and electrode pattern layer 60 is tried to achieve in calculating; And being made into the table of corrections of corresponding each check point P1～P25, it comprises central point, the electric current summation of adjacent in twos check point P1～P25, the electric current out of the ordinary of electrode;
Afterwards, the electric current out of the ordinary of the central point through aforementioned known check point P1～P25, electric current summation, electrode can be in the hope of the distance (being aperture) of aforementioned two different contact PA, PB and the computing formula of relative angle;
And then, the distance of two that try to achieve different contact PA, PB is cooperated aforesaid table of corrections with relative angle, calculate the current center of two contact PA, PB to scale;
At last, through distance, angle and the current center of aforesaid two different contact PA, PB, and further try to achieve X coordinate and the Y coordinate of two different contact PA, PB respectively.
On operational architecture; System can be at the non-uniform electric field of the transparency conducting layer 52 of contact panel 50; When the electric capacity charge effects can appear in finger contact contact panel 50; Form capacitive coupling between each first and second X lateral electrode 61,62 that makes contact panel 50 top electrode patterned layer 60 and first and second Y lateral electrode 63,64 and finger, and then produce capacitance variations, controller passes through four corner strength of current of aforementioned manner measurement; And utilize first and second X lateral electrode 61,62 of its electrode pattern layer 60 and the impedance of first and second Y lateral electrode 63,64 to lay with equal difference or geometric ratio mode increasing or decreasing to homonymy; Make on the contact panel 50 two to produce the phenomenon of gradient in same level or vertical contact resistance, effectively prevent two different contact PA, when PB moves, the electric current of electrode pattern layer 60 outputs is cancelled each other; So just can calculate the position of two different contact PA, PB according to size of current; Move with dilatory so that controller is judged its follow-up convergent-divergent, rotation, satisfying the multiconductor demand of surface capacitance type contact panel, and can significantly simplify the formation and the manufacture difficulty of multipoint mode contact panel; And then reduce its manufacturing cost, effectively significantly promote the surcharge and the economic benefit of surface capacitance type contact panel.
The present invention has an embodiment in addition again; Former electrodes patterned layer 60 is the design of eight exit points; It is as shown in Figure 9; The two ends of the one X lateral electrode 61 of this electrode pattern layer 60 are arranged with the lead 651,652 that a confession measures voltage, electric current; And the two ends of a Y lateral electrode 63 are arranged with the lead 661,662 that a confession measures voltage, electric current; The two ends of the 2nd X lateral electrode 62 are arranged with the lead 671,672 that a confession measures voltage, electric current again; As for the two ends of the 2nd Y lateral electrode 64 be arranged with one supply to measure voltage, electric current lead 681,682, aforementioned wire 651,652,661,662,671,672,681,682 is selected from the elargol of electric conductivity, and lead 651,652,661,662,671,672,681 and 682 and be laid in the nonclient area surface of contact panel 50 with the screen painting mode; Again on the contact panel 50 and have two and supply leads 651,652,661,662,671,672,681,682 connecting portion 691,692 laid of side points in addition, for the controller (not shown) of distinguishing electric serial connection contact panel 50.
Moreover; Shown in figure 10; Be an embodiment more of the present invention; First and second X lateral electrode 61,62 and first and second Y lateral electrode 63,64 of former electrodes patterned layer 60 are multisection type, make electrode pattern layer 60 in contact panel 50 around forming plural corresponding virtual workspace, and the impedance of relative first and second X lateral electrode of each section 61,62 first and second the Y lateral electrode 63,64 relative with each section to homonymy with equal difference or the laying of geometric ratio mode increasing or decreasing; Preferable states with present embodiment; Be to make this first and second X lateral electrode 61,62 have 611,612 and two section the 2nd X lateral electrode 621,622 of two section the one X lateral electrode, and the slope of two section the one X lateral electrode 611,612 and two section the 2nd X lateral electrode 621,622 by contact mutually with the equal difference mode by the center to the left and right the two ends convergent extend, the impedance of first and second X lateral electrode 61,62 is successively decreased by middle mind-set two ends; Make its impedance be the purpose that equal difference is successively decreased and reach; Have 631,632 and two section the 2nd Y lateral electrode 641,642 of two section the one Y lateral electrode as for this first and second Y lateral electrode 63,64, and the slope of two section the one Y lateral electrode 631,632 and two section the 2nd Y lateral electrode 641,642 extends to two ends convergent up and down by the center with the equal difference mode by contact mutually, the impedance of first and second Y lateral electrode 63,64 is successively decreased by middle mind-set two ends; Make its impedance be the purpose that equal difference is successively decreased and reach; Make contact panel 50 produce the phenomenon of gradient in same level or vertical contact resistance, electric current is cancelled each other when preventing that two contacts from moving, and then calculates the position of trying to achieve different contacts according to size of current; Make the surface capacitance type contact panel can satisfy multifinger demand, have the effect that can reduce production costs simultaneously concurrently.
With this, be appreciated that the present invention is the splendid creation of an intention, except the problem that effective solution known technology is faced, more significantly promotes effect.
Claims (10)
1. the multi-point touch structure of a surface capacitance type contact panel; It is characterized in that; This contact panel is made up of a transparency carrier, a transparency conducting layer and an electrode pattern layer at least; Wherein electrode pattern layer forms around contact panel layer at transparent layer periphery with rectangle, and the edge impedance of each opposing parallel of electrode pattern layer is laid with equal difference or geometric ratio mode increasing or decreasing to homonymy again, moreover four corners of electrode pattern layer are electrically connected the lead that a confession measures output current respectively.
2. the multi-point touch structure of a surface capacitance type contact panel; It is characterized in that; This contact panel is made up of a transparency carrier, a transparency conducting layer and an electrode pattern layer at least; Wherein electrode pattern layer is arranged with a relative at least one X lateral electrode and at least one the 2nd X lateral electrode in the upper and lower edge of contact panel; Electrode pattern layer is arranged with a relative at least one Y lateral electrode and at least one the 2nd Y lateral electrode in the left and right edge of contact panel again; And first and second X lateral electrode and first and second Y lateral electrode form around the contact panel surface periphery with rectangle; Wherein first and second X lateral electrode be impedance to homonymy with equal difference or geometric ratio mode increasing or decreasing, again first and second Y lateral electrode also be impedance to homonymy with equal difference or geometric ratio mode increasing or decreasing, and the end of first and second X lateral electrode and first and second Y lateral electrode be electrically connected respectively one supply to measure output current lead.
3. according to claim 1 or claim 2 the multi-point touch structure of surface capacitance type contact panel; It is characterized in that this electrode pattern layer is reached impedance to the physical condition of homonymy with equal difference or geometric ratio mode increasing or decreasing to change its slope, width, area, thickness, spacing, material, the number of turns or its hybrid mode.
4. according to claim 1 or claim 2 the multi-point touch structure of surface capacitance type contact panel is characterized in that this electrode pattern layer is that the technology of screen painting is formed on the contact panel.
5. according to claim 1 or claim 2 the multi-point touch structure of surface capacitance type contact panel is characterized in that this electrode pattern layer is selected from the carbon paste of electric conductivity.
6. the multi-point touch structure of surface capacitance type contact panel as claimed in claim 2 is characterized in that, first and second X lateral electrode of this electrode pattern layer, and it is connected in series by first and second X lateral electrode of opposing parallel more than two sections respectively and forms.
7. the multi-point touch structure of surface capacitance type contact panel as claimed in claim 2 is characterized in that, first and second Y lateral electrode of this electrode pattern layer, and it is connected in series by first and second Y lateral electrode of opposing parallel more than two sections respectively and forms.
8. the multi-touch method of a surface capacitance type contact panel; It is used for a surface capacitance type contact panel; This contact panel has a transparency carrier, a transparency conducting layer and an electrode pattern layer at least and coincides relatively and form; And one or most first and second X lateral electrode that electrode pattern layer has an opposing parallel with one or first and second Y lateral electrode of majority of opposing parallel with rectangle around the layer at transparent layer periphery; It is characterized in that the impedance when move same level or vertical contact of this contact panel produces the phenomenon of gradient, electric current is unlikely when making two different contacts move cancels each other.
9. like the multi-touch method of the described surface capacitance type contact panel of Shen claim 8; It is characterized in that; This first and second X lateral electrode is impedance to be laid with the method for the increasing or decreasing of equal difference or geometric ratio to homonymy, and first and second Y lateral electrode and be impedance and lay with the method for the increasing or decreasing of equal difference or geometric ratio to homonymy.
10. the multi-touch method of surface capacitance type contact panel as claimed in claim 9; It is characterized in that; This first and second X lateral electrode and this first and second Y lateral electrode make its impedance can equal difference or geometric ratio mode and the physical condition that successively decreases or increase progressively to change slope, width, spacing, area, the number of turns, material, thickness or its hybrid mode, to reach.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN105389062A (en) * | 2014-09-03 | 2016-03-09 | 点石光电股份有限公司 | Surface-capacitive touch control panel and position determining method for touch-control coordinates |
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