TW201102886A - A positioning method of multi-touch - Google Patents

Abstract

A touch panel comprises a conductive layer, an electrode formed in one side of the conductive layer and a plurality of probe electrodes against the above-mentioned electrode in the other side of the conductive layer. The touch panel positioning method includes steps of providing a first voltage to the electrode and a plurality of probe electrodes, wherein the electrode and a plurality of probe electrodes are electrically coupled to the conductive layer, providing a second voltage to the conductive layer, wherein a touch point is defined by contacting the first voltage and the second voltage, measuring each voltage of a plurality of probe electrodes and finding a relative voltage and voltage of probe electrodes near the relative voltage. The touch point is confirmed in the physical position of the conductive layer based on the relative voltage and voltage of probe electrodes near the relative voltage.

Description

201102886 VI. Description of the Invention: [Technical Field] The present invention relates to a positioning method of a touch screen. [Prior Art] The touch panel of the prior art mainly includes a resistive type, a capacitive type, an infrared type, and a surface acoustic wave type. Generally, a four-wire or five-wire sensing resistive touch screen is used to detect a voltage change on a conductive film in an analogy manner. Therefore, in the course of use, only a single touch action can be recognized at the same time, when the user simultaneously When a multi-point Φ touch action is input, a malfunction occurs. The recent development of touch screens that can simultaneously perform two or more points of input has gradually become a popular trend. The multi-touch screen is mainly a multi-line capacitive touch screen, which generally comprises two transparent conductive layers respectively disposed on two sides of a transparent glass. According to the resolution of the product, the two conductive layers respectively form a plurality of patterned and parallel arranged wires. And the wires on both sides are perpendicular to each other, and the coordinates of the touched point are judged by repeatedly scanning the plurality of wires and analyzing the change in the capacitance thereof. However, the capacitive touch screen of multiple touch point operations can be simultaneously performed. SUMMARY OF THE INVENTION In order to solve the problem that the prior art touch screen manufacturing process is high and the manufacturing process is high, and the driving method is also complicated, the cost of the multi-point capacitive touch screen is greatly increased, and the suitable calving is limited. Spider ^ Year Li driving method蓣

The complexity of the operation, the number of touch points simultaneously - the process and the driving method are relatively simple, the positioning method of the touch screen. 201102886 ... a touch screen branch method, comprising: providing - _ screen = screen comprising a conductive layer with impedance anisotropy and a detection electrode disposed at the '===; providing a first voltage to the field touch screen When contacted, 'provides a second voltage to the conductive layer, and the second applied voltage is applied as a touch point; the plurality of probes are measured in sequence: voltage, and the relative extreme voltage is found and The voltage of the nearest neighbor of the extreme voltage is detected; and the position of the touch point at the position of the conductive layer is determined according to the measured extreme voltage and the position of the detecting electrode of the nearest neighbor. Another method for positioning a touch screen, comprising: providing a touch screen, the touch screen comprising a “first conductive layer”, a plurality of spaced apart first detecting electrodes disposed on the touch screen side, a second conductive layer, and a plurality of spaced apart second detecting electrodes on a side perpendicular to the plurality of detecting electrodes, wherein the first conductive layer and the second conductive layer have impedance anisotropy; and providing a first voltage to the first conductive Providing a second voltage to the second conductive layer, the contact point between the first conductive layer and the second conductive layer is defined as a touch point; measuring the voltage of the first detecting electrode on the day and finding out Determining the touch point in the conductive layer according to the measured maximum voltage of the first detection electrode and the first detection electrode position of the nearest neighbor detection voltage, relative to the extreme value voltage and the voltage of the first detecting electrode adjacent to the extreme value and the voltage a horizontal position coordinate; and measuring a voltage of the plurality of second detecting electrodes and finding a relative extreme voltage and a second probe adjacent to the extreme voltage, the voltage of the electrode 'according to the measured extreme voltage and most The position of the second detecting electrode of the neighboring detecting voltage determines a coordinate of the touch point at a vertical position of the conductive layer. Compared with the prior art, the touch screen adopting the above positioning method uses a resistivity anisotropic material, in particular, a conductive polymer layer or a carbon nanotube material 201102886 is used to fabricate a conductive layer, in particular, a carbon nanotube having a preferred orientation arrangement. The film is made of a conductive layer, which has the following advantages: First, the resistivity of the carbon nanotube film having the preferred orientation arrangement is anisotropic, by measuring the voltage on the side of the carbon nanotube film, according to the position of the voltage drop The actual coordinate of the touched point can be judged by the decreasing amplitude. The touch screen has a simple structure and a simple driving method. Secondly, the carbon nanotube film of the preferred orientation is divided into a plurality of conductive materials extending along the carbon nanotube. Channels, different detecting electrodes correspond to different conductive channels, so the touch screen can realize multi-touch operation according to the voltage change on each conductive channel, and the number of touch points is theoretically unrestricted, realizing the function of multi-touch; Third, the excellent mechanical properties of the carbon nanotubes make the carbon nanotube layer have high toughness and mechanical strength. Therefore, the use of the carbon nanotube layer as a conductive layer can correspondingly improve the durability of the touch screen; fourth, the carbon nanotube film has good electrical conductivity, can improve the conductivity of the touch screen, thereby improving its resolution and accuracy. Fifthly, the carbon nanotube film has good light transmittance, so that the touch screen has good optical performance. In the above driving method of the touch screen, by measuring the voltage of the detecting electrode to become φ, the relative extreme value voltage and the nearest neighbor detecting voltage of the adjacent relative extreme value are found, and according to the three voltages, a touch screen called three-point interpolation is proposed. The positioning method can accurately determine the coordinates of any point on the touch screen, and has high accuracy. [Embodiment] Please refer to Fig. 1, which is a schematic cross-sectional view showing a first embodiment of a touch panel of the present invention. The touch screen 2 includes a first substrate 21 and a second substrate 22 disposed opposite to each other. The first substrate 21 is generally made of an elastic material, and the second substrate 22 is made of a rigid material to carry a certain pressure. In this embodiment, the first base 201102886 board 21 is a polyester film, and the second substrate 22 is a glass substrate. The first substrate 21 is provided with a first conductive layer 23 opposite to the surface on the side of the second substrate 22. A second conductive layer 24 is disposed on a surface of the second substrate 22 opposite to the first substrate 21. An adhesive layer 25 is disposed at an edge between the first substrate 21 and the second substrate 22 to bond the first substrate 21 and the second substrate 22 together. The distance between the first conductive layer 23 and the second conductive layer 24 is 2-1 〇 micrometers. The first conductive layer 23 and the second conductive layer 24 are spaced apart from each other by a plurality of spacers 27 that are isolated from each other. The plurality of spacers 27 are insulated and supported to enable the first conductive layer 23 and the The second conductive layer 24 is in an electrically insulated state in an initial state. It can be understood that when the size of the touch screen 2 is small, the spacer 27 is an optional structure, and it is only necessary to ensure that the first conductive layer 23 and the second conductive layer 24 are electrically insulated in the initial state. Referring to Fig. 2, a schematic plan view of the first conductive layer 23 and the second conductive layer 24 is shown. A Cartesian coordinate system is introduced in the figure, which includes mutually perpendicular X-axis directions and γ-axis directions. The first conductive layer 读 includes a Vth electrical layer 231 and a first electrode 232. The first conductive layer 231 is a rectangular indium tin oxide film, thereby having a lower resistivity and a higher light transmittance. The first electrode 232 is continuously disposed on four sides of the first conductive layer 231. And electrically connected to the first conductive layer 231. The second conductive layer 24 includes a second conductive layer 241, a second electrode 242, and a plurality of detecting electrodes Εη_Εΐχ, wherein χ is a natural number, which represents the number of the plurality of detecting electrodes 243. One of the first conductive layers 241 is a resistive anisotropic conductive film, i.e., it has a different resistivity in one-dimensional two. Specifically, the lateral resistivity 0 of the second conductive layer along the X-axis direction is greater than the longitudinal resistivity ρ2 of the second conductive layer. The second electrode 242 is an elongated electrode disposed on a side of the second transparent conductive layer 241 perpendicular to the extending direction of the carbon nanotube, that is, the second transparent conductive layer 241 in FIG. The side is electrically connected to the second transparent conductive layer 241. The plurality of detecting electrodes EirElx are uniformly disposed on the other side of the second conductive layer 241 opposite to the second electrode 242, that is, the lower side of the second conductive layer 241 in FIG. 2, and the plurality of detecting electrodes En - Eijp electrically connects the second conductive layer 241. Due to the resistance anisotropy of the carbon nanotube film, the plurality of detecting electrodes φ E11-Elx divide the second conductive layer 241 into a plurality of corresponding conductive paths. As a preferred embodiment, the second conductive layer 241 is made of a carbon nanotube film material having a uniform thickness. The carbon nanotube film has a thickness of from 0.5 nm to 100 μm. The carbon nanotube film is a layered structure having a uniform thickness formed by an ordered carbon nanotube. The carbon nanotube is a mixture of one or more of a single-walled carbon nanotube, a double-walled carbon nanotube or a multi-walled carbon nanotube; wherein the diameter of the single-walled carbon nanotube is 0.5 nm to 50 nm, the diameter of the double-walled carbon nanotubes is 1.0 nm to 50 nm, and the diameter of the multi-walled carbon nanotubes is 1.5 nm to 50 N. The carbon nanotubes in the carbon nanotube film are arranged in a preferred orientation in a single direction or in a preferred orientation in different directions. Further, the second conductive layer 241 is formed of a carbon nanotube film or a stacked carbon nanotube film, and the overlapping angle of the multilayer carbon nanotube film is not limited. The nanotubes are arranged in an orderly manner. Furthermore, the carbon nanotube film comprises a plurality of preferentially oriented carbon nanotubes having substantially equal lengths and connected to each other by van der Waals forces to form a continuous carbon nanotube bundle. Specifically, the carbon nanotubes in the second conductive layer 241 are arranged in a preferred orientation along the Y-axis direction shown in FIG. 2. 201102886 Sexual special (four) (four) carbon nano (four) mystery has impedance anisotropy The carbon susceptibility film along the carbon nanotubes in the direction of the resistance of the extension, 、, perpendicular to the electrical resistance of the carbon nanotube extension direction. Specifically, as shown in Figure 2, the transverse resistivity of the current direction of the tortoise-tomb of the tomb-w-conducting layer 241

Uia is greater than, and the longitudinal resistivity along the γ axis. In general, the value of Pi/P2 is loud as the size of the touch screen 2 increases. When the size (rectangular diagonal) of Jane M, 2 is less than 3.5 inches, the value of pl/p2

If not, when the size of the touch screen 2 is larger than 3.5 inches, the value of pi/p2 is preferably not less than 5. Further, in the embodiment, the size of the touch screen 2 is 35 inches, and the ratio of the lateral resistivity to the longitudinal resistivity pl/p2 of the carbon nanometer f used is greater than or equal to 100, for example, the lateral resistance is 54 〇 kilo ohm, and the longitudinal direction is The first electrode 232, the second electrode 242 and the plurality of detecting electrodes Ειι-Ε1χ* are made of a low-resistance material, such as aluminum, copper or silver, to reduce the attenuation of the electrical signal. In this embodiment, they are all made of conductive silver. The driving method of the touch screen 2 is as follows: during the driving process, the first electrode 232 is connected to a first voltage level, and the first electrode 242 and the plurality of detecting En-Elx are connected to a second voltage level, wherein the first voltage level is The bit may be south of the second voltage level or lower than the second voltage level. The positioning method is specifically described below by taking the first voltage level lower than the second voltage level as an example. Specifically, the first electrode 232 is electrically connected to the ground of the touch screen 2 system, that is, the voltage of the first conductive layer 231 is undulating. The second electrode and the plurality of detecting electrodes En-Elx receive a high voltage level. In the embodiment, the voltage of the first conductive layer 241 is 5 volts at 5 volts. The plurality of detecting electrodes 201102886

En-Elx can be used to detect the corresponding position of the second conductive layer 241 to provide information for touch positioning. When the user does not perform any operation on the Lai screen 2, the crucible 1 and the second conductive layer 241 are insulated from each other, / · Lei, Li Gudan / gamma. Zidzi is a 3 gang of conductive layer 241. 1 The detection voltages of the plurality of detection electrodes Ειι·Εΐχ are equal, and when referring to FIG. 3, the remote touch screen 2 is not touched and the electric level diagram of the plurality of detection electrodes E11_Elx of the second touch screen 2 is used. Fig. 3 ❿ = axis ^ The physical abscissa of the plurality of detecting electric power M11_Elx, the longitudinal sleeve indicates the detecting voltage of the detecting electrode Ε11_Ε1Χ. Since the plurality of detecting electrodes η-ΕιΛ_ are equal in voltage, the figure _ is perpendicular to the vertical line. When the user slaps the screen 2 for difficult operation, the first substrate 21 is bent toward the second substrate 22 under the force of the force, so that the first conductive layer and the second conductive layer 241 generate electricity at the touch point. connection. If it is a single touch, a single electrical connection point is created at the touch; if it is a multi-touch, multiple electrical connection points are generated accordingly. Since the voltage of the first conductive layer 231 is lower than the voltage of the second conductive layer 241, at this time, the detection voltage of the detection electrode Eu-Elx corresponding to the touch point changes. Specifically, the voltage of the corresponding point detecting electrode Eu-Elx will be lower than the voltage of the second electrode 241, that is, less than 5 volts. Experiments have shown that the magnitude of the voltage drop of the detection electrode Eu-Elx is related to the ordinate corresponding to the position at which the touch point is located. The closer the touch point is to the second electrode 242, the smaller the voltage reduction of the detection electrode Ειι_Εΐχ corresponding to the touched point is. The further the touch point is farther away from the second electrode 242, the detection electrode Eu-Elx corresponding to the touched point The greater the voltage drop, that is, the distance of the touch point of the probe 201102886 two electrodes 242

Voltage. As shown in the figure, the voltages detected by the three detecting electrodes E12, E15, and (10) have unequal fluctuation ranges, respectively. The relationship between the voltage of the electrode En-Elx and the touch point to the second positive correlation. According to the position of the voltage drop point in the coordinate axis in the voltage curve, it can be intuitively determined that the three touch points A, B, and Μ correspond to the detecting electrodes as the detecting electrodes Ε12, Ε15, Ε18', and the three detecting electrodes are £12, The yaws of ει5 and Ε18 are the abscissas of the two touch points. Further, according to the voltage drop amplitudes of the two detecting electrodes Ε12, Ε15, and Ε18 corresponding to the touched points, the distance between the plurality of touched points and the Eu-Elx electrode, that is, the ordinate of the touched point in the coordinates, can be divided into φ. The coordinates of all touch points on the touch screen can be determined by the above method. The above touch screen 2 using a carbon nanotube film has the following advantages: the first 'carbon nanotube film having a preferential orientation alignment has an anisotropy, and the voltage of the plurality of detecting electrodes Εη_Ε1χ is measured according to the voltage drop. The actual coordinates of the touched point can be determined by the position and the decreasing amplitude. The touch screen 2 has a simple structure and a simple driving method. Secondly, the carbon nanotube film of the preferred orientation is divided into a plurality of carbon nanotube tubes. The direction of the conductor 201102886 electrical channel, different detection electrodes El-Ex corresponding to different conductive channels, so the touch screen 2 can achieve multi-touch operation, and the touch point is theoretically unrestricted, truly realize the function of multi-touch; Thirdly, the excellent mechanical properties of the carbon nanotubes make the carbon nanotube layer have high toughness and mechanical strength. Therefore, the use of the carbon nanotube layer as the conductive layer can correspondingly improve the durability of the touch screen 2; The carbon nanotube film has good electrical conductivity, which can improve the conductivity and accuracy of the touch screen; fifth, carbon nano The film has good transparency, so that the touch screen has a good light transmission. Please refer to FIG. 6, which is a schematic plan view of the first conductive layer 43 and the second conductive layer 44 of the second embodiment of the touch screen of the present invention. Only the planar structure of a first conductive layer 43 and a second conductive layer 44 is shown. The touch screen is similar to the touch screen 2 of an embodiment, except that the structure of the first pass layer 43 is similar to the structure of the second conductive layer 44, that is, the first conductive layer includes - a first conductive layer 431 made of a carbon nanotube film, a strip-shaped pole 432 and a plurality of first detecting electrodes E2i_E2y, wherein y is a natural number representing the number of the first detecting electrodes; the second conducting The layer 44 includes a second conductive layer 441 made of a stone anti-mast film, a second electrode of the first type of detecting electrodes E11-Elx, and X represents the plurality of second detecting electric powers: number! Natural number. Further, the carbon nanotubes in the first conductive layer 431 extend in the X-axis direction of the sitting axis, and the first electrode 432 is disposed on the left side edge of the first transparent conductive layer 431 to extend in the γ-axis direction, and is electrically Connecting the first transparent film 431', the plurality of first detecting electrodes E21-E2y are uniformly disposed on the right side of the first electric layer 431 opposite to the first electrode 432, and electrically connecting the first electric layer 431 . The resistivity P3 of the first conductive layer 431 along the Y-axis direction is greater than 11 201102886, and its resistivity is 0 along the x-axis direction, and the value of the port / (?4) along the first conductive layer 431 along the Y-axis direction The driving method of the touch screen 4 is: when determining the abscissa of the touch point, the first electrode 432 and the first detecting electrode & % are grounded, the second electrode 442 and the first measuring electrode E11 -Elx is connected to a high voltage, which is 5 volts in this embodiment. The amplitude of the touched point is determined by determining the voltage of the plurality of second detecting electrodes Ειι_Ειχ in each of the different measurements to determine the touch point, and the ordinate is determined by the individual measurement. The voltage of the first detecting electrode determines the ordinate of the touched point. The positioning method of the touch screen 4 is called 'by applying a low voltage to the first electrode=2 and detecting the electrode&, and applying a high voltage to the first The two electrodes and the ♦ wood 'electrode Ell_Elx' respectively measure the voltage changes of the first detecting electrode E21-E2y and the second detecting electrode to determine the ordinate and the horizontal and the target of the touch point without analyzing the voltage drop. The driving method is simpler and more accurate. Furthermore, in addition to the carbon nanotube film, the conductive layer in the above embodiment may also adopt other materials having resistivity anisotropy, such as conductive high scores and sub-materials, and some low dimensions (one-dimensional or two-dimensional). Crystal material, etc. In the above-mentioned low-dimensional j (one-dimensional or two-dimensional) crystal material, since the electrons in the material are restricted to conduct in the linear or two-dimensional plane of the dimension, the conduction of these materials ^ It has an advantage in one or two lattice directions and a decrease in conductivity 1 in other directions, that is, has resistivity anisotropy, or is called conductive anisotropy. Both of these materials conform to the present invention for conductive anisotropy. The requirements of the conductive layer can achieve the same or similar effects of the above embodiments. However, in the above driving method, when the touch point corresponds to any of the first detecting electrodes E2rE2y on the horizontal axis or any second detecting electrode 12 201102886 'The method can accurately determine the touch point of the seat, the touch point is in any two parts - the probe electrode pressure is calculated by interpolation to get the precise position of the touch point. The following is a detailed description of a type of three-point internal motion, _determining any point on the touch screen 4:: square = the positioning method of the seat is described in detail as an example. ', the third is to determine the touch by three-point interpolation The point coordinate method has a second type of voltage measurement (4). The horizontal axis of the towel of Fig. 7 indicates the multi-=2 electrode E11 and its corresponding abscissa, and the vertical axis is the output voltage of the multi-detection electrode E11_Elx. It means that the touch point and the detection voltage in the vicinity of the touch point are not displayed. The point is the relative position of the Z point on the horizontal axis of the touch screen 4. The point B is the minimum value of the detected voltage wave, and Xn is the voltage. The minimum value of the electrode abscissa, which corresponds to the detection of Eln 2 such as X_1. Point A, point C is the detection voltage corresponding to the detection electrode Eln] and the minimum value of £111+1 of the detection electrode Eln. Points A, B, and values are, vn, Vn+1, and VngVn, Vn+gVn, respectively. Set-constant Ρχ#σ-variable As, the value of ρχ is the half of the distance between any two adjacent detections = Εΐ1·Εΐχ, and the necessary value is equal to the lateral offset distance of the touch point 最近 to the nearest pole Eln. The relationship between I and I satisfies the following equations: ^ = /(Δ1, Δ2) △Hl-ki Δ2 = κ+1-Κ| Further calculations, Equation 1 is specifically expressed as: 13 (i) 201102886 Μ>Δ2=&gt ;Α5=^χ^Δ2 Δ1 ^ Δ1 = Δ2=^Δ5=0 I Α1 Δ1<Δ2=>Δ5=Ρ ^ " Δ2 again, Xt = Xn + AS, (3) where 'xt is the touch point Coordinates, when νη is a minimum voltage, the touch point position xt is (Vwvn+1), (Vn+i_Vn), (Vn rVn) a function of any two of them as a function, and Xn is the abscissa of the detecting electrode Ein. Combining equations (1), (2), and (3), we get:

Λ-ι = Κ+1 => Xt = χη ^t = Xn + p V K-1 ~νη+ι χ K+l~vn (4)

K-i ^t+1 Xt = Xn + px K.-K The calculation of three special points is discussed below: When Δ1*0; Δ2*0, then: It is indicated that the touch point approaches the center line position of the detecting electrode Ein^ and the detecting electrode Eh, and the abscissa value approaches χη_ρχ; when Δ1 = Δ2, Δ5 = 〇. Then the touch point approaches the position corresponding to the detecting electrode Εη, and the abscissa value approaches Χη; when Δ1 is 0; Δ2«0, the 'station' is household, thereby obtaining: along ρ. Then the touch point approaches the The position of the center line of the detecting electrode Eln and the detecting electrode Eln+1 has an abscissa value approaching Χη+Ρχ. The above three cases are in accordance with the experimental analogy, and the financial program (2) satisfies the description of the touch point ' coordinate 'the touch screen The position of any point of the horizontal axis of 4 is accurately determined by the above equation (4). 201102886

- Qing Shen _8, which is a voltage measurement diagram of the second embodiment of the method of coordinate three points interpolation method. According to the same principle, the first detection point: "The detection voltage of the touch point is only shown in the second figure. The point τ is the relative position on the vertical axis of the touch 7 'Wu Ping 4'. Point Β, to detect the voltage wave open/middle voltage maximum value, which corresponds to the detecting electrode E2m, 2^η々_; ι. Point Α, , point C is the detection voltage corresponding to the detection electrodes hm-l and E2m+1 of the detection electrode 2 where the maximum value is located. Point Α, B, c, voltage values are Vm-1, Vm', Vm+1', and VnM, gVm,, V "Vm, . . . Set a constant py and a variable AS, Py The value is - half of the distance between any two adjacent detecting electrodes Eu-E^, and the value of as, is equal to the lateral offset distance of the touch point τ to the nearest neighbor detecting electrode E2m. AS, and v , , v , , mv The relationship of jjj+1 satisfies the following equations: Δ5'=/(Δ1', Δ2') ΔΓ=Κν-^1 (5) △2'=lni Further calculation, the square group 5 is specifically expressed as:

Ar>A2'=>A5'=/>yx Ar=A2,=s>AS'=0 AS'=Pyx

Al'-A2' ~ ΔΓ ΔΓ-Δ2' Δ2' (6)

Yt = Ym + AS, (7) where 'Yt is the ordinate of the touch point. When Vm is the maximum voltage, the touch occupies the position Yt (VwVm+0 '(Vm+1_Vm) '(Vm-i_Vm). A function of the variable, Yin is the ordinate of the detecting electrode E2m. Combining the equations (5), (6), (7), we get: 15 201102886

Yt ~ Yffj + P x ^»1-1 ~^m+1 yn I = vm+l => n = ym <K, +1 =>n = Km + ^ -匕. (8) i+l Discuss the calculation of three special points: Beware of 0;·0 when ϋ-Λ, and thus: Wish 4. It is indicated that the touch point approaches the center line position of the probe electrode U and the probe, and its ordinate value approaches Ym_Py; when the electrode E2 is Δ1' = Δ2', where ’, 《, 竹, y / η. Then, the touch point approaches the value corresponding to the detecting electrode E2m and approaches Ym; the vertical sitting finger is ΔΝ〇; Δ2'«0 when 仏-A, thereby obtaining: heart plus 4. Then, the touch point approaches the detection electrode E2m and the detection electrode, and the 4-page coordinate value approaches Ym + Py. The above three cases are in accordance with the experimental analogy, indicating the description of the T point of the touch point of the equation, and the bit of the touch screen clock is determined by the above equation (8). With the above algorithm, the coordinates of the contact can be determined more accurately. Kai 丄 忍 请 Please ^ Figure 9'. It is the touch screen to determine the touch point coordinates. The touch screen 4 is divided into two regions, respectively an intermediate region] two peripheral regions η', wherein the intermediate region includes all the shortest distances from the touch edge is greater than or equal to the distance from the vertical edge distance ρ, and the peripheral region includes all distances The lateral direction of the touch screen 4 is smaller than the area where the distance between the small longitudinal sides is smaller than Ρχ. The values of Px and Py are as defined above. 16 201102886 : Touch the point in the middle area! When, for example, the touch point magazine can perform coordinate positioning by equation (4) and equation (8). When the above-mentioned #= point falls in the _ area 11 'the time', the seat of the touch point satisfies the detecting pole of the second detecting electrode when the first detecting electrode E21_E2y is smaller than the second detecting core. The value is -= electrode voltage, the detection pole of the first detection electrode is a maximum value of the power plant: the value is for the horizontal axis coordinate: and = Κ is the reference voltage level, where ν is the touch point Τ1 is between Ε1χ~Εΐχ -Ρχ, its horizontal axis is closest to 2^V1 1χ

E The equation of the coordinates of the touched face: ^^~px+PxXL·, V,- Under the foot f, V« is the reference voltage level,

Vr^v ... ’ x heart vx. , 'Coordinates meet the above equation (8).

Eu, ▲ touch point Tl is between E21~E2i+TV whose vertical axis is closest to the probe; the proximity detector electrode is only e22. 17 201102886 For the vertical axis coordinate: When 乂1 is the maximum voltage, the touch point position Yt is (Vi'-V/) When a function of the variable, the touch point position Yt satisfies the following equation: , VR' is the reference voltage level, where

M ~ VR VAVAVr,. For example, if the touch point 1\ is between E2y and E2y-Py, the vertical axis is closest to the detecting electrode E2y, and the next adjacent detecting electrode is only. At this time, its Vy' is the maximum voltage, and the φ touch point position Yt is (Vy'-VyY) as a function of the variable, and the coordinates of the touch point satisfy the following equation:

Yt = Yy-py+pyxXi^L, VR’ is the reference voltage level, where

Vy'Vy-AVR,. Its Xt coordinates conform to equation (4) above. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional view showing a first embodiment of a touch panel of the present invention. Figure 2 is a plan view showing the planar structure of the first conductive layer and the second conductive layer of the touch screen shown in Figure 1. Fig. 3 is a voltage graph of the detecting electrode of the touch panel when the touch screen shown in Fig. 1 is not touched. Fig. 4 is a view showing the actual position of a touch point for performing a three-point operation on the touch panel shown in Fig. 1. Fig. 5 is a graph showing the voltage of the detecting electrode of the touch panel shown in Fig. 4 under a three-point touch operation. 18 201102886 Figure 6 is a plan view showing the planar structure of the first conductive layer and the second conductive layer of the second embodiment of the touch panel of the present invention. Fig. 7 is a schematic diagram showing the voltage measurement of the first embodiment of the touch point coordinate method using the three-point interpolation method of the touch screen shown in Fig. 6. FIG. 8 is a diagram showing the voltage measurement of the touch screen coordinate method of the second embodiment of the touch screen shown in FIG. Figure 9 is a schematic illustration of the partitioning of the touch screen shown in Figure 6 for determining the touch point coordinates.

[Main component symbol description] 2, 4 touch panel 23 431 first conductive layer 21 first substrate 232, 432 first electrode 22 second substrate 241 > 441 second conductive layer 23, 43 first conductive layer 242, 442 second Electrode 24, 44 second conductive layer 243 detecting electrode 25 adhesive layer 433 first detecting electrode 27 spacer 443 second detecting electrode 19

Claims (1)

201102886 VII. Patent application scope: 1. - A kind of positioning method of Cong screen, which provides a touch screen, which is wrapped in the /, anti-anisotropy conductive layer and a plurality of interphases of the conductive layer-side Supplying - a voltage to the conductive layer; an electrode, when the touch screen is contacted, applying a second voltage to the conductive layer, the plurality of detected electrical touch points are sequentially measured; and the etch , voltage, and find the relative extremum voltage and the nearest neighbor to the extremum voltage. According to the measured electric enthalpy of the electrode, and the pole position: the position of the detection electrode of the nearest neighbor detection voltage, determine The touch point is at a position of the conductive layer. 2. If the electrode of the i-th item of the patent application scope is defined by the electrode, the plurality of probes v_v are defined in turn, and the probes corresponding to x are respectively defined as 1 coordinates of the probe electrodes are defined as W any tone= The distance between the detecting electrodes is defined as 2PX, and the intermediate power is: 2 "Εΐη ' 2$η$χ-1, vn is the extreme value voltage, and the two detecting electrodes adjacent to the detecting electrode of the extreme value voltage respectively define gEini, Eln+1 'touch point coordinates are positioned as Xt. h·1, 3·If you ask for a patent (4) 2 rhyme, it depends on: #The first pressure is less than the second material 'the extreme voltage is - the maximum voltage 4. As described in the third paragraph of the patent application, the feature is that when Vi is the maximum voltage, the touch point position Xt satisfies the following equation. 20 ί S] 201102886 Xt = Xx+Px -Pxx Fl ~Vz VR is the reference voltage level, where VpV^Vr. 5. As described in claim 3, it is characterized in that when 乂< is the maximum voltage, the touch point position Xt satisfies the following equation: Xt= Xx~P^P^yx-vR, VR is the reference voltage level, of which VpVxAVr ° 6. If the patent application scope is 3 The method is characterized in that when Vn is a maximum value voltage and 2 < η < x-1, the touch point position Xt satisfies the following system: π-1 nl <κ+1 = ^Xt- =Xn + Pxx = ^π+1 = ^Xt- ^Xn >v^„+1 = ^Xt: :Xn + Px 乂Vn+ln 7. As described in claim 2, it is characterized in that When the first voltage is greater than the second voltage, the extreme voltage is a minimum voltage. 8. As described in claim 7, the feature is that when 乂1 is a minimum voltage, the touch point position Xt satisfies the following equation: Xt = Xl + Px-PxxVl~Vl, VR is the reference voltage level , where VR sVpV!. 9. As described in claim 7, the feature is that when Vx is a minimum voltage, the touch point position Xt satisfies the following equation: V - V Xt = Xx - Px + Px ~ ~ 匕 h , VR is Reference voltage level, where VR > VX.! > VX ° 21 201102886 10. As described in claim 7 of the patent application, characterized in that when Vn is a minimum value voltage, 2 < n < xl, The touch point position Xt satisfies the following equation: <κ+1 = ^Xt = Xn + Pxx /1-1 /i+lu =κ+1 = ^Xt =Xn >κ+1 = 々Xt = Xn + Pxx Nu. 11. The method of claim 1, wherein the conductive layer is a parallel carbon nanotube film. 12. The method of claim 1, wherein the touch screen has a first electrode with respect to one side of the plurality of detecting electrodes, and the first voltage is supplied to the conductive by the first electrode. membrane. 13. The method of claim 12, wherein the first electrode and the plurality of detecting electrodes are arranged in a direction perpendicular to a main conducting direction of the conductive layer. 14. The method as claimed in claim 12, characterized in that, when the voltages of the plurality of detecting electrodes are sequentially measured, the first voltage is supplied to other detecting electrodes that are not measured. 15. A method of locating a touch screen, comprising: providing a touch screen comprising a first conductive layer, a plurality of spaced apart first detecting electrodes disposed on one side of the touch screen, a second conductive layer, and disposed in a plurality of spaced apart second detecting electrodes on a side of the plurality of first detecting electrodes, wherein the first conductive layer and the second conductive layer have impedance anisotropy; and providing a first voltage to the first conductive layer 22 201102886 provides a second voltage to the second conductive layer, the contact point between the first conductive layer and the second conductive layer is defined as a touch point; measuring the voltage of the plurality of first detecting electrodes, and looking for Determining a relative touch voltage and a voltage of the first detecting electrode adjacent to the extreme value voltage, and determining a touch point in the conductive layer according to the measured extreme value voltage and a first detecting electrode position of the nearest neighbor detecting voltage a horizontal position coordinate; measuring a voltage of the plurality of second detecting electrodes, and finding a relative extremum voltage Φ and a voltage of a second detecting electrode adjacent to the extremum voltage, according to the measured pole Second detecting electrode position detection voltage and the voltage of the nearest neighbor, determining a vertical position of the touch point coordinates of the conductive layer. 16. The method as claimed in claim 15 is characterized in that: the plurality of second detecting electrodes are sequentially defined as E21-E2y, and the corresponding detecting voltages are respectively defined as Vi'-Vy', the plurality of seconds The coordinates of the detecting electrodes are respectively defined as Yi-Yy, and the distance between any two adjacent second detecting electrodes is defined as • 2Py, and the extreme voltage is Vm′, and the extreme voltage corresponding to the detecting electrode is defined as E2m, 2SmSy-l The two detecting electrodes adjacent to the detecting electrode corresponding to the extreme voltage are respectively defined as Ehj, E2m+1, and the coordinates of the touch point in the direction of the second detecting electrode are positioned as Yt. 17. The method of claim 16, wherein when the first voltage is less than the second voltage, an extreme voltage of the first detecting electrode is a maximum voltage, and the second detecting electrode The extreme voltage is a very small voltage. 23 201102886 18. As described in claim 17, it is characterized in that when 乂: 'is a minimum voltage, the touch point position Yt satisfies the following equation: Yt = Yl + P - PXH y , VR' is a reference Voltage, wherein, as described in claim 17, it is characterized in that when Vy' is a minimum voltage, the touch point position Yt satisfies the following equation: V - V ' Yt = Yy ^ P ~ , V is Reference voltage, where VR^Vy-AVy'. • 20. As described in claim 17, it is characterized in that when 乂/ is a minimum voltage and 2<m<yl, the touch point position Yt satisfies the following equation: Vm^<Vm+l ^Yt = Ym + Py «卜-1,' m m+1 Vm^=Vm+^Yt = Yrn ν^>νπι+ι'^Υί = Υηι + Ρϊχψ^4 vmv m-\ 〇21. The range is as follows: ^ When the first voltage is greater than the second voltage, the extreme value of the first detecting electrode is a minimum voltage, and the extreme voltage of the second detecting electrode is A maximum voltage. 22. As described in claim 21, the feature is that when Vi' is a maximum voltage, the touch point position Yt satisfies the following equation: Yt = Yl + P-PxVl~V2, and Vr' is a reference voltage. Where v^V/sVr'. 24 201102886 23. As described in claim 21, characterized in that when Vy' is a maximum voltage, the touch point position Yt satisfies the following equation: Yt=Yy-Py+PyxVy~VyA &one& , 乂^ is the reference voltage, where ¥/>¥^1'>¥^. 24. As described in claim 21, characterized in that when Vm' is a maximum voltage, where 2<m<yl, the touch point position Yt satisfies the following equation: Vm^<Vm+^Yt = Yrn + Pyxl^f4 Vm^=Vm+1^Yt=Yrn K,-!'> Yt = Ym + Pyx V^~ym-\ ymy m+1 〇25. As described in claim 15 The first conductive layer and the second conductive layer are parallel carbon nanotube films, and the main conductive directions of the first conductive layer and the second conductive layer are perpendicular to each other. 26. The method as claimed in claim 15 , wherein the first conductive layer has a first electrode with respect to one side of the plurality of first detecting electrodes, and the first voltage is generated by the first electrode Provided to the first conductive film, the second conductive layer has a second electrode on a side of the plurality of second detecting electrodes, and the second voltage is supplied to the second conductive film by the second electrode. 27. The method as claimed in claim 26, wherein the first electrode and the plurality of second detecting electrodes are arranged in a direction perpendicular to a main conductive direction of the first conductive layer, the second electrode and the plurality of The second detecting electrodes are arranged in a direction perpendicular to the main conductive direction of the first conductive layer. 25 201102886 28. The invention as claimed in claim 26, characterized in that: when the voltages of the plurality of first detecting electrodes are sequentially measured, the first voltage is supplied to other first detecting electrodes that are not measured, And providing the second voltage to the second detecting electrode that is not measured. 29. The method as claimed in claim 26, characterized in that: when the voltages of the plurality of second detecting electrodes are sequentially measured, the second voltage is supplied to other second detecting electrodes that are not measured, and is provided The first voltage is to a first detecting electrode that is not measured. 26