TW555981B - Continuous single-line type touch panel and method to detect the touching position and area thereof - Google Patents

Abstract

The present invention is to provide a continuous single-line type touch panel and method to detect the touching position and area thereof. The touch panel has a stacked upper and lower plates with some spacing. The lower plate has a continuous curved resistor line coated on its top surface. The resistor line has plural lateral and longitudinal impedance segments alternatively connected. The upper plate is short-connected to the lateral impedance segments of a predetermined number in the resistor line when the upper plate is touched. The detection method comprises: (A) measuring the voltage at both ends of the resistor line; (B) when the touched portion is short-connected to the resistor line, dividing the resistor line into a short-circuit portion whose resistance is not calculated, and the first, second resistor portions from both ends of the resistor line to both ends of the short-circuit portion respectively; (C) finding the resistance of the first, second resistor portions; (D) finding the integer number of the lateral and longitudinal impedance segments, and the remainder number of the lateral impedance segments covered by the first, second resistor portions; (E) computing the longitudinal coordinates and lateral coordinates at both ends of the short-circuit portion based on the integer number and the remainder number; (F) estimating the area of the touch portion based on the longitudinal coordinates and lateral coordinates.

Description

555981 A7 B7 V. Description of the invention ([Field of the invention] ^ The present invention relates to a touch panel and a touch pressure detection method thereof, and particularly to a resistive touch panel and a touch pressure detection method thereof. I [习 知 技艺Description] With the prevalence of computer networks, Internet life is no longer as necessary as sitting in front of a desk to operate a mouse or keyboard, and the advent of "touch screens" _that is, an important technology to make the Internet interface more lifelike Taking the current Kiosk at the entrance of many government-owned units as an example, in order to avoid operational difficulties and prevent people from obtaining information, most of them use touch screens that directly click options on the screen, so Touch screen has definitely become a new user interface. Depending on the physical method of measuring the touch point, the touch panels used in previous touch screens can be roughly divided into: resistive touch panels, capacitors Type touch panel, wave type touch panel, etc., resistive touch panel is a finger or other contact lightly generates voltage. Capacitive panel is pressed by a finger, I draw a tiny current by a finger (commonly used in a touchpad of a notebook computer). "As for the wave panel, the entire surface is covered with sound waves or infrared rays, and these standing wave patterns are blocked when a finger or contact touches the panel. The touch panel shown in the first figure is a resistive touch panel. &Quot; The touch panel includes upper and lower plates 11, 12 and most of the intervals are arranged between the upper and lower plates 11, 12 Insulating dot spacer 13. The upper plate 11 has a sheet-like plate body 111 made of glass or elastic plastic (such as unsaturated polyethylene telephthalate, PET) and one of the plate bodies 111 covering the plate-like plate body 111. The bottom surface of the resistive film 112, and the lower plate 12 has a paper size applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) Page 3 555981 A7 ________B7 V. Description of the invention (2) Glass or elastic plastic The sheet-like plate body 121 and a resistance film 122 covering one of the top surfaces of the plate body 121, and the spacers 13 are disposed between the resistance films 112 and 122 at intervals. Push down When the lower plate 12 is pressed, the touched position of the upper plate u will form a depressed portion 14 that is depressed and deformed relatively downward, so that the conductive film 112 located at the touched portion 14 touches the resistance film of the lower plate i2 down 22, And the conduction is on.. The aforementioned resistive films 112 and 122 of the upper and lower boards 11 and 12 are set according to the touch. There are roughly four-wire method, eight-wire method and five-wire method touch panel. The following briefly The touch pressure detection methods of various types of touch panels and the components and structures used to achieve the detection function are explained, and similar components below are represented by the same number. As shown in the second figure, the conventional four-wire method is A touch panel is formed with an x input electrode 113 and an x output electrode 114 at two ends of one of the bottom surfaces of the resistance film U2 of the upper plate 11 in the x direction, and the lower plate 12 is in a γ direction orthogonal to the X direction. A Y input electrode 123 and a Y output electrode 124 are formed at both ends of the electrode. Since the resistive films 112 and 122 facing the upper and lower plates 11 and 12 are formed by a uniform impedance body, the upper and lower plates u and When voltage is applied to one side of the plate 12 and the other side is grounded, The respective positions of the upper plate 11 (or the lower plate 12) generating potential which is proportional to the position and with the distance between the electrodes, thereby forming a potential gradient of the same inclination. As shown in the third figure, in standby mode, a central processing unit (not shown) of the touch panel controls the upper board Π2 × input, wheel out electrodes Η], 114 and switches 115 and 116 connected in series are The switch is closed, and the input and output electrodes 123 and 124 of the lower plate 12 are connected in series.

555981 V. Invention description (3) and 126 are in an open circuit state ', so the voltage of the lower plate 12 can be monitored through another switch 14 which is preset to be connected to the X output electrode 114. At this time, if the point P (X, y) of the upper plate H is pressed with a pen or the like, it is assumed that the impedance between the χ input electrode ι3 and p is X2 ′ p and the impedance of the parent wheel output electrode 114 is χι, then the voltage of the lower plate 12 仏 = ^ 1, and then assume that the distance between the X input electrode 113 and the X output electrode 114 of the upper plate 11 is L, which is preset to -A in the four-wire touch panel. / D converter, that is, the position where the p point is located on the X coordinate is detected as Vx > < L according to the value.

After Vcc, the central processing unit then controls the switch 115 at the X input electrode 113 connected to the upper board to open, and the switch 116 at the \ output electrode 114 closed to keep the upper board n at the ground potential and connect the lower board 12 The switches 125 and 126 are closed and opened respectively, so that the lower plate 12 is maintained at the potential of μ. Assuming that the impedance between the Y input terminal # 123 and the p. Point is Η, the impedance between the point and the γ output electrode 124 is yi, then the voltage of the plate u

Vcc X Λ) V; V = 3 ^, assuming that the distance between the Υ input electrode 123 and the Υ output electrode 124 of the lower plate 12 is W, the A / D converter can also detect that the ρ point is at the Υ coordinate according to the ^ value The up position is Li ^.

Although the Vcc four-wire method touch panel is the most + introduced and currently uses more than one product, its design still has many shortcomings that need to be improved as follows: 1. The required current is large, which may easily cause the panel to overheat and damage other i Zhang's scale is suitable for wealth _ house standard (CNS) ^^ ⑽ 是 公 爱) Page 5 555981 A7

555981 A7

',, = Upper plate 11' 疋 must be frequently touched by the user, and 纟 is easily scratched, so it is easy to cause damage and affect the detection function. There are χ and γ-direction electrodes on the upper and lower plates U and U, respectively. It is difficult to accurately determine v. · If you can see that, the two ends of the upper plate 11 along the X direction are formed with X-wheel lightning, electrodes 113, and X output electrodes. 114, and the lower plate 12 is formed with γ input electrode 23 and ¥ output electrode 124 at both ends of the γ direction orthogonal to the X direction, so that the position coordinates of the pressure point can be detected correctly. Therefore, the upper The lower plates 11 and 12 must be superimposed at ninety degrees to increase the difficulty of production. 5. It does not have the function of detecting touch area. This function is very valuable for many drawing applications. In order to improve the above-mentioned problem of uneven electric field distribution, an eight-wire method touch panel as shown in the fifth figure has been developed. The main method is to separate the supply of the power supply να from the voltage detection, and it is more difficult to avoid the electric field during detection. Linear edge area. Here, the [S] sample is only used as an example for the above board ii. The eight-wire method touch panel is mainly provided on the resistor film 112 of the upper board u, and each has an X input electrode connected to it i 3 Two spaced excitation lines 117 in the middle of the X output electrode and 14 and two space detection lines 118 respectively connected to one of the end portions of the X input electrode and the X output electrode 114, and the ends of the two excitation lines 117 are used to connect The power supply Vcc and the two detection lines are used to detect the voltage, so that the power supply is separated from the voltage detection, thereby improving the problem of uneven electric field distribution in the four-wire touch panel. Although the eight-wire touch panel can improve the problem of uneven electric field distribution in the four-wire touch panel, the rest is related to "the current required is large," and this paper size is in accordance with the Chinese National Standard (CNS) A4 specification (210X297 (Public love) Page 7 555981 A7 B7 V. Description of the invention (ό) Once the board is damaged, it will damage the touch panel detection function "," It is difficult to accurately overlap the upper and lower boards at 90 degrees ", and Defects such as "Unable to detect touch area" still cannot be improved. In order to solve the problem that “once the upper board is damaged, the touch panel detection function will be damaged”, a five-line touch panel as shown in Figures 6 and 7 was developed. The five-line touch panel is only used The upper board 20 is used to read the voltage. The upper board 2 has a board body 201 and a conductive film 202 covering a bottom surface of one of the board body 201. The circuit connection method is via a resistor & 202 is connected to the power source Vcc, and a central processing unit 23 reads the voltage, and moves the voltage switching to the lower board 21. The lower plate 21 is covered with a long-face-shaped resistance layer 2 at the center of a top surface of a plate body 210, and a plurality of diodes (or analog switches) are connected around the surface-shaped resistance layer 211. ΧΗ〇χ ″, DxwDxb-6, DYd-Dyad, Dyw-Dyw. These two talents " body DXa-1 DXa_6, DmDxb ^ are arranged along the x-axis, and the diodes D ^ -DYa- 6. DYwDYb-6 is set along the γ axis. The positive end of the diode Dn-DYa_6 and the negative end of the diode are connected to a switch SW2 by a wire 24. The diode Dxa factory Dx "of The positive terminal and the negative terminal ij of the diode Dyb-i DYb_6 are connected to a switch SW3 by another wire i5. When on standby, the switch SW1 is closed, and the switches SW2 and SW3 ground the wires 24 and 25 respectively, so the reading of the central processing unit 23 is usually the voltage value of the voltage Vcc. When the user touches the upper plate 20, the voltage of the upper plate 20 instantly changes to ground. After that, the operations of reading the Xγ coordinates are developed separately. First, the central processing unit 23 will open the switch SW1, and the wire 24 is connected to Vcc through SW1. At this time, the current flows from the diode Dya_i-DYa_6 to the diode. The paper size applies the Chinese National Standard (CNS) A4 specification (210X297). ） ~ Page 8 555981 De A7 Factory — _____B7 V. Description of Invention (7) DYb-6. The voltage of the upper plate 20 is determined by the χ coordinate of the touch point, so the central processing unit 23 can estimate the χ value from the voltage of the conductive film 20 of the upper plate 20. Then the 'central processing unit 23 connects the wire 24 to vcc through SW3. At this time, the current is transferred from the diode Dxu-Dxa · to the diode Dxb l_Dxb 6. The voltage value of the conductive film 202 on the upper board 20 can be used to calculate Touch the γ coordinate of the point. The conventional five-wire touch panel is practical, although it can improve the aforementioned four-wire > method, the electric field in the control panel is uneven, and the upper and lower plates must be exactly 90 degrees full and the upper plate is damaged. It will damage the detection function of the touch panel and so on. For its structural design, it is necessary to add a lot of diode elements. Obviously, it will increase the manufacturing cost, the difficulty of production, and the complexity of the control program of the central processing unit 23. In addition, the problem of large current is still not improved, and it is also impossible to detect the pressing area. [Summary of the invention] Therefore, the purpose of the present invention is to provide a resistive continuous method that does not require switching voltage, saves power, can reduce the impact of the damage of the upper board on the detection function, has a low manufacturing cost, and can detect the contact area. Single-line touch panel and its detection and method. Therefore, the detection method of the present invention is used to detect a touched position and a touched area when a continuous single-line touch panel is pressed. The touch panel has spaced-apart upper and lower plates, and the lower plate has A resistance line covered on a top surface thereof, the resistance line has a transverse impedance section and a longitudinal impedance section which are mostly alternately connected, the upper plate is available for pressure, and has a conductive layer covering a bottom surface thereof. When the board is pressed, the conductive layer is used to short-circuit a predetermined number of transverse impedance segments of the resistance line. The method of detecting the touched position and touched area is the paper size applicable to China National Standard (CNS) A4 specifications ( 210X297 mm) ~ Page 9 555981

5. Description of the invention (8) Contains: (A) Continuous measurement of the resistance line

The vertical coordinate value of the two ends of the two ends, the voltage of the two ends of the resistance line. (B) When the resistance line is touched, the resistance line is divided into two parts, and the first and second resistance parts are respectively divided by two ends of the resistance line. (C) Find this value. (D) Based on the remaining number of vertical and horizontal resistance sections respectively covered by the first and second resistance sections. (E) Convert the short-circuit part based on the entire number of the first and second impedance sections, and convert the lateral coordinate values of the two ends of the short-circuit part based on the remaining number of the transverse impedance sections of the first and second resistance sections. And (f) Estimate the area of the contacted part according to the horizontal and vertical coordinate values of the two ends of the short-circuit part. [Brief description of the drawings] Other features and advantages of the present invention will be clearly understood in the following detailed description of the preferred embodiments with reference to the drawings. In the drawings: The first figure is a conventional resistance type A cross-sectional schematic view of the use state of the upper and lower panels of a touch panel; the second image is a three-dimensional exploded schematic view of the upper and lower panels of a conventional four-wire method touch panel; the third image is a conventional four-wire method touch panel Schematic diagram of circuit wiring. The fourth diagram is the electric field distribution of the board above the conventional four-wire touch panel. The fifth diagram is the bottom view of the board above the conventional eight-wire touch panel. Home Standard (CNS) A4 specification (210X297 public love) Page 10 555981 A7 B7 V. Description of the invention (9) The // picture shows the three-dimensional schematic diagram of the upper and lower panels of the conventional five-wire touch panel; ^ The seventh diagram is a schematic diagram of related circuit connections and lines of the lower panel of the conventional five-wire touch panel. The eighth diagram is a three-dimensional exploded diagram of a preferred embodiment of the touch panel of the present invention. This is one of the preferred embodiments. Intention; the tenth figure is an equivalent circuit diagram of a resistance plate being short-circuited by the upper board being pressed by one of the preferred embodiments; the eleventh figure is the resistance wire being short-circuited by the pressing in the preferred embodiment The simplified schematic diagram of the geometric structure at that time is a first calculation example of the method for detecting the position and area of the touch pressure. Figure 12 is a view similar to Figure 11 and illustrates a second calculation example. Tenth Figure 3 is a view similar to Figure 11 illustrating a third calculation example; and * Figure 14 is a view similar to Figure 11 illustrating a fourth calculation example. [Detailed description of the preferred embodiment] This is the embodiment of the present invention to achieve the above detection. Refer to Figures 8 and 9. • The method is a three-dimensional exploded and side sectional view of the touch panel. The touch •• Top and bottom configuration

The control panel can be touched by the user's operation. It includes ... and the lower plate 4, most of the space is set on the upper spacer 5 (see the ninth picture), and a 555981

V. Description of the invention (10) A central processing unit (not shown) for estimating the position and area of a touched part. The lower plate 4 has a plate body 41, a resistance line 42 covering a top surface of the plate body 41, and two first and second lower electrodes 46, 47 connected to two ends of the resistance line 42, respectively. The resistance line 42 has a plurality of transverse impedance sections 421 and longitudinal impedance sections 422 which are vertically and staggeredly connected to each other. The transverse impedance sections 421 extend at intervals between two opposite sides of the lower plate 4 and the longitudinal impedances. The segments 422 are respectively connected between two ends of the transverse impedance segments 42 丨, so that the entire resistance line 42 forms a single linear shape that is continuously bent and extended. The entire resistance wire 42 can be made by etching or sputtering a resistive conductive film, so that the total length of the single continuous bent wire body formed by connecting the entire resistance wire 42 from the horizontal and vertical resistance sections 421 and 422 is LT and the total resistance value. Is rt. The length LT and resistance value RT of the resistance line 42 are not only related to the screen size, but also related to the design length, width, and interval of the horizontal and vertical impedance sections 42 and 422. Take the screen width W and length L equal to 20cm x 20Cm (8 "X8") as an example. When the length of the horizontal impedance section 421 of the resistance line 42 is equal to the screen length L (that is, 200mm), the width is equal to 1mm, The distance between two adjacent horizontal impedance segments 421 is equal to imm (that is, equal to the length of the longitudinal impedance segments 422), then the screen width LT is approximately:

Transverse impedance segment width + distance between adjacent transverse impedance segments ~~ x & ® • length of the impedance segment When the unit length impedance of the resistance line 42 is 200 Ω, the total resistance of the overall resistance line 42 is about jQOOO surface χ2 〇〇 side

Page 12 555981, invention description (11

4M When the applied power is Vcc 4 5V ’, the required current is = Ampere (A) β. It can be seen that when the resistance line designed in this example is tested with voltage Vcc, it will save power. The upper board 3 has a board body 31 and a low-resistance conductive layer 32 covering the two surfaces of the board body M material 2. The plate body 31 may be made of an elastic plastic substrate, and the conductive layer 32 has an upper electrode 321 connected to its periphery. By the above structure, when the user touches the upper plate 3, the plate body 31 at the contact portion 30 will be recessed downward together with the conductive layer 32, and the resistance line is shorted from the conductive layer 32 downward. A predetermined number of two dozen j of 42 makes the equivalent circuit of the overall resistance line 42 form a state as shown in the tenth figure, 'By the conductive layer 32 at the pressure-sensing part 30, it is shorted down to the resistance line: 2 and The resistance line 42 is divided into a short-circuit portion 43 and two first and first-resistance portions 44 and 45 from the first and second lower electrodes 46 and 47 to the two ends of the short-circuit portion 43, respectively. The resistance value of the low-resistance conductive layer 32 is very low, and is relatively small compared to the resistance value of the resistance line 4MΩ. Therefore, the resistance value of the short-circuit portion 43 can be regarded as zero. ^ As for the resistance values of the first and second resistance materials, 45, the voltage Vcc can be connected to the first lower electrode 46 of the resistance line 42 and a reference resistor Rf is connected in series to the first lower electrode 47. Ground, and cooperate with the central processing unit to convert the resistance values of the first and second resistance portions 44 and according to the voltage Vcc, the voltage value of the detected pressure contact portion 30 and the reference resistance I, and find out The horizontal and vertical sections covered by the first and second resistance sections 44, 45 respectively

Page 13 555981 A7 B7 V. Description of the invention (12 The whole number of the impedance sections 421 and 422, and the remaining number of the transverse impedance section 421. In this way, the longitudinal impedances covered by the first and second resistance sections 44, 45, respectively The entire number of segments 422 is used to convert the vertical coordinate values of the two ends of the short-circuited portion 43 generated by the contact pressure portion 30, and according to the remaining number of the horizontal impedance segments 421 of the first and second resistance portions 44, 45, the conversion is made. The lateral coordinate values of the two ends of the short-circuit portion 43 can then be used to estimate the area of the pressure-pressed portion 30 based on the vertical coordinate difference and the horizontal coordinate difference parameter. The detection method can be made clearer. The following uses simplified geometric structure to illustrate four calculation examples. [Calculation example 1] As shown in the eleventh figure, and in conjunction with the tenth figure, the resistance line 42 has eleven The transverse impedance sections 42 1 are equal to ΔW in width and spacing, and the first and second lower electrodes 46 and 47 are located at the upper left corner and the lower right corner, respectively. The middle voltage Vcc is applied to the first lower electrode 46 and the second The electrode 47 is connected to a reference resistor Rf in series and grounded. The voltage value of the reference resistor Rf is set to Vf, and the total resistance value of the resistance line 42 is RT. Therefore, the resistance value of the entire resistance line 42 can be calculated. RT = KVcc) 〇. V / ) When the user touches the touch panel, in this calculation example, the touch pressure part 30 is shorted to the fourth, fifth, and sixth horizontal impedance segments 42 from the top to the bottom as an example. The voltage of the part 30 is ντ, the total length of the resistance line 42 is LT, the lengths of the first and second impedance parts 44 and 45 are Llx L2, and the resistance values are Ri and R2 respectively. The following calculation formula can be derived: This paper scale applies China National Standard (CNS) A4 Specification (210X297 mm) Page 14 555981 A7 B7 V. Description of Invention (13) R,

Rf (Ycc-Vt) r {^ R ^ cc-Vt)

Li = YxLr £ \ / j *

Rr-Vf xl ^

Rf (Vt-Vf) yf u

RT xLf

Rj ^ cXil xLj. Since the contact part 30 shorts some resistance wires 42,

Rt〉 Ri + R2 0

Once L2 is obtained, the coordinates of the lower left corner (Xi, yj and upper right corner (x2, y2) of the dust contact position can be estimated by the following process. In fact, the Ui 'yi) and (χ2, y2) are It is the coordinate value of both ends of the short-circuit part 43. It should be noted here that the calculation of the coordinate values in the general touch panel is based on the top left corner of the panel as the origin (0, 0), the horizontal X coordinate value to the right, and the vertical Y coordinate value to the bottom, below The calculation of the coordinate values is based on the labeling principle.

First take the length of two horizontal impedance sections 42 1 and two longitudinal impedance sections 42 1 as a length unit, that is, use 2 (L + Z \ W) as a length unit, and first find the first and second impedance sections. 44, 45 how many integer multiples of the length unit and the remaining numbers 'are first calculated from (ϊ ^ / Rt) Lt 1 ^ = 36111111, and (R2 / rt) lt is calculated from L2 = 59mm, so L' = 36 2 (L + AW)-2 (10 + 1) It can be known that n1 == l and m1 = 14. From the remainder m1 = 14, we know that the remainder only covers a section of transverse impedance section 421 (its length L = 10mm). ) And a longitudinal impedance section 422 (its length Δ w = lmm), the remaining length after deducting the length of this Δ W) is the incomplete transverse impedance section 421 of the first impedance component connected to the pressure-contacting portion 30. Length, which is mi_L_Aw = iren

Page 15 555981 · A7 ________B7 V. Description of the invention (14) 10-1 = 3mm. L, 59 _ 2 (L + AW) = 2 (Ι〇Τΐ) = remainder% 'It can be known that n2 = 2' m2 = 15 'It can be seen from the remainder that 2 = 15 that the remainder only covers a section of horizontal impedance 421 and a longitudinal impedance segment 422. The length remaining after deducting the (L + AW) length is the length of the incomplete transverse impedance segment 421 connected to the second impedance portion 45 and the pressure-contacting portion 30: m2-L -/ \ W equals 15-10-l = 3mm. Then we can know that the horizontal coordinate value x1 = 4 (that is, Xl = m2-LA W), and the horizontal coordinate value x2 = 10-4-3 = 7 [that is, x2 = L- x1 = L- (m2-LA W) = 2L -m2 + AW] ο As for the vertical coordinate values yi and y2, it can be obtained from the longitudinal distance occupied by the first and second impedance portions 44, 45, where: ye The longitudinal distance occupied by the first impedance portion 44, ypC touch panel Total width W)-(longitudinal distance occupied by the second impedance portion 45) That is, yh yi can be obtained from the above-mentioned m, n2, and m2, because the longitudinal distance occupied by each length unit is 2X (transverse impedance segment width + Longitudinal impedance segment length) = 2 (/ \ ^ ¥ + ^ \ ¥) = 2 乂 2 / \\ ¥. It can be obtained directly from the longitudinal distance occupied by η + the longitudinal distance occupied by mi, where ~ the longitudinal distance occupied is η × 2χ2Δ w, and the remainder is called the longitudinal distance occupied when it is greater than L. It can be known that The longitudinal distance is (edge impedance segment width + longitudinal impedance segment length) = 2Α \ γ, that is, y2 = (nix2 x 2Δ λ ¥) + 2Δ W = 2Δ W (2ni + 1). Substituting each numerical value into the formula can obtain the coordinate value y2 = 6mm °. When calculating 'must first find the longitudinal distance occupied by the second impedance portion 45, that is (rl2 This paper size applies the Chinese National Standard (CNS) A4 specification (210X297) ) Page 16 555981 A7 B7

The vertical distance occupied by +) (the vertical distance occupied by Melon 2), and the vertical distance occupied by its center is ii2X2X2AW. When the vertical distance occupied by the remainder is greater than 1, it can be known that the vertical distance occupied by it is (transverse impedance segment width + longitudinal impedance segment length) = 2Z \ W. That is, the longitudinal distance occupied by the entire second impedance portion 45 = (heart X2 × 2Δ W) + 2A 2Δ W (2n2 + 1), so 2 yi = W. [(n2X2X2A W) + 2A W] = W-2A W (2n2 +1). Substitute each value into the formula to get the coordinate value yi = llmm. The results obtained by summing up the coordinates (Xl, X2) and (yi, y2) of the above-mentioned pressure-sensing part 30. When the remainders mpL and m ^ L, the following calculation formula and actual value can be obtained. Table 1: xi = m2 * L-Δ W = 15-10-1 = 4mm »x2 = 2L- m2 + Δ W = 20-14 + l = 7mm» Y2 = 2 Δ W (2n1 +1) = 6mm? yi-W-2 / \ W (2n2 + l) = 21-2 (5) = llmm, then the contact pressure area can be obtained = | (y2_ yi) (x2_ x〇 | = 15 mm2 ° The above derivation must pay attention to the following Several characteristics ... 1. The resolution of the calculation will decrease as the width and pitch of the horizontal and vertical impedance sections 421 and 422 in the resistance line 42 decrease. 2. In each calculation formula, it is really used to calculate the first The lengths Li and L2 of the second and second impedance portions 44 and 45 are determined by the ratios of Rl / RT and r2 / rt, respectively. It is not necessary to strictly control during the production process. In addition, if the resistance line 42 itself is controlled by temperature or other environmental physical factors and changes, Rt, Ri, R2 will also be changed in the same proportion without affecting the R " RT and R2 / Rt Paper size applies Chinese national standard CNS) A4 specification (210X297 male foot) ~ Page 17 555981 A7 B7 5. The ratio of the invention description (16), so it will not distort the detection result, just like the present invention has the test of the pressure position and area. Automatic correction effect. 3. The longitudinal impedance section 422 of the resistance line 42 is located at the edge of the touch panel and is not designed to be touched by the user. 4. In the exception of this plan, 'is the length L of the transverse impedance section 421 For comparison, in the case of mpL and m ^ L, the actual values of the coordinate values χ 2 χ2, ^, & are obtained. However, there are four possible combinations of "two" and "two" respectively. Are mpL, m ^ L, mi < L, m2 > L, mi < L, m / L, etc. The calculation formulas of the coordinate values χι, χ2, force, and y2 will be different due to different combinations, and may be The results are shown in Table 1. The derivation of m1 > L and m2 > L in λ has been explained in detail in the first calculation example. The derivation process of the other three cases is roughly similar to the derivation process described above, so it will not be derived below. Only the actual values are substituted into the calculation formula to explain, and the four groups of calculations listed in Table 1 In actual design, the program is designed in the central processing unit, and the central processing unit performs calculations. 5. In this calculation example, the first and second lower electrodes 46 and 47 of the resistance line 42 are respectively located at The layout of the upper left and lower right corners are examples. However, when designing the layout of the resistance line 42, you can still use "upper left with lower left", "upper right with lower right", or "upper right with lower left". ”/ Muang Guang” temple matching situation, that is, the designer can use any of the four combinations as described above. Of course, according to the different combinations, the temple tick dehydration pressure you value fork 1, X2, The calculation formulas of y2 and y2 will also be different. You must stay in the central void-τ Tianshuang Li early designing the program to cope with it. [Calculation example two]

Page 18 555981

Referring to the twelfth figure, the various conditions in this figure are the same as those in the eleventh figure, except that the pressure-pressing part is different. The pressure-pressing part 30 is shorted to the fourth and fifth horizontal impedance sections 421 from top to bottom. The coordinate values of the two ends of the short-circuit portion 43 obtained are the upper-right coordinate (Xl, yi) and the lower-right coordinate, y2) of the pressing position, respectively. " " 1 ^ = 36: 01111 derived from RVRT and L2 = 69mm derived from R2 / RT, so L 36 is more than 14 L 69 ίΙ ^ Γ ^ Ι5ΤΓΊ3 remaining 3 That is, m2 = 3mm < L, this The result accords with the second case in Table 1. Substituting each value into the corresponding calculation formula in Table 1 can be obtained.

Xi = 2L- m! + Δ W = 20-14 + 1 = 7mm x2 = L- m2 = 7mm = ι = 2Δ W (2n1 + l) = 6mm y2 = W-2A W (2n2) = 21-2 (6 ) = 9mm Yu 疋 * ^ 2 * xi = 7-7 = 0mm »y2- y1 = 9-6 = 3mm» In this case, the first and second impedance portions 44 and 45 are in contact with the contact pressure portion 30. The parts are located on the same side, and the obtained value of Xι will be 0mm, so it is not suitable to use (x 2 _ xi) for calculation when calculating the area of different touch pressures. When designing the program for the central processing unit, you can use ml > In the case of L, m2 < L, or when the absolute value difference between (h-Xi) and (y ^ yi) is too large, the Chinese standard (CNS) A4 specification (210X297 mm) is applied to the paper scale based on the vertical coordinate difference. ） Page 19 555981 A7 ------------ B7__ 5. Explanation of the invention (18 ^ " " '—'—- The square of (ym) is used as the calculation value of the contact area, that is, Can be obtained

AwWrnm2. This calculation method will be very close to the actual use state. This is because when the touch panel is generally pressed with a finger or a drawing pen, the upper plate 3 and / or the conductive layer 32 will be depressed in a flat shape with similar length and width when pressed. When the state touches the resistance line 42 downward, it is impossible for the gap between the length and the width to be too large. Therefore, using (y2-y 1) 2 as the contact pressure area will be very close to the actual contact pressure area. [Calculation example three] Refer to the thirteenth figure. In this figure, the contact pressure point 30 is shorted to the fifth and sixth horizontal impedance segments 421 from top to bottom, and the coordinates to be sought are the contact pressure positions respectively. Coordinates in the upper right corner (xi, yi) and coordinates in the lower right corner (x2, y2). 1 ^ = 49111111 is deduced from Ri / Rt, and L2 = 60mm is deduced from R2 / RT, so the L 49 Watt πτ cut = 2 more than 5 U 60 2a + AW) " T (l〇 + 1) = " 2 is called = 2 is 16. That is, mpSinmcL, m2 = 16mm > L. This result is in accordance with the third case in Table 1. Substituting each value into the corresponding calculation formula in Table 1 can be obtained.

X 1 = Π! 1 = 5 m III x2 = m2-L-Δ W = 16-10-l = 5mm Υ! = 4Δ W (n1) = 8mm y2 = W-2A W (2n2 + l) = 21- 2 (5) = l 1mm This paper size is applicable to China National Standard (CNS) A4 specification (210X297mmt) — page 20 555981 A7 B7

V. Description of the invention (19) Therefore, x2- xpS-SsOmm, =, can estimate the contact pressure area = (y2-. [Calculation example 4] Refer to the fourteenth figure, the contact pressure point 30 in this figure is short-circuited. The fifth, sixth, and seventh horizontal impedance segments 421 are counted from the top to the bottom, and the coordinates to be sought are the upper left coordinate (Xl, yi) and the lower right coordinate (X2, y2) of the touch position.

• 1 ^ = 49x11111 derived from Ri / RT, L2 = 46mm derived from R2 / Rt, so

Lx 49 One * · 2 (L + AW) ~ 2 (10 + 1) One U 46 2 (L + AW) ~ 2 (10 + 1) That is, mfSmnKL, m2 = 2mm < L, this result meets Table 1. In the fourth case, substituting each value into the corresponding calculation formula in Table 1 can be obtained.

Xi = mi = 5mm

== 2 remainder 2 X2 = L- m2 = 10-2 = 8mm Υι = 4 Δ W (n1) = 8mm y2 = W-4A W (n2) = 21-4 (2) = 13mm Therefore, x2- Xi = 3mm, yz-yFSmm, the contact pressure area can be obtained = | (y2-yi) (X2-X mm2.) As for the above description, it can be concluded that the present invention has the following advantages and effects: 1. Small working current: This embodiment is taken as an example. The total resistance of the entire resistance line 42 is 4MΩ, and its current is only 555981 A7 when a power supply voltage Vcc of 5V is applied. 5. Description of the invention (20 ^ " 一 ' -~~ A UA Obviously, the use current required by the touch panel of the present invention is quite small, so it is not easy to cause the touch panel to overheat, and it will not damage other components. &Amp; can improve the aforementioned It is known that the power consumption of the touch panel is lacking. The total resistance of the overall resistance line 42 can be seen depending on the geometric shape λ of the resistance line 42. The difference is different, and the magnitude of the relatively flowing current also changes. Homo sentence: The present invention uses the majority of the lateral impedance section 421 and longitudinal impedance section 422 of the resistance line of the lower board 4, and any one of the two adjacent transverse impedance 杬 & 421 ends and borrows a longitudinal impedance section. 422 is connected, so that the resistance line 42 forms an integral curved structure design. Regardless of the user's touch area, the change of the touch pressure position will only affect the resistance of the resistance line 42, that is, the resistance layer 42 The design of the adjustable resistor is formed, so the problem of uneven electric field distribution will not occur. 3. There is no need to consider the overlap angle of the upper and lower plates. · Because the touch panel design of the present invention is based on the resistance of the lower plate 4 The layer 42 forms a continuous bending path, so that when the user touches the touch panel, the impedance of the resistance line 42 of the linked lower plate 4 is divided into a short-circuit portion 43 and a non-calculated resistance value for reading. The first and second impedance portions 44 and 45 detect the χ-γ coordinate of the touch pressure position by using the changes of the first and second impedance portions. Therefore, the upper and lower plates 3 and 4 of the touch panel of the present invention are stacked. It is not necessary to consider the superimposing angle at the time, so the manufacturing efficiency can be improved and the manufacturing cost can be saved. 4. Even if the upper board 3 is damaged, the detection function of the touch panel will not be distorted: Board 3 is only used to short the resistance wire of lower board 4. 42 'So when the top plate 3 is damaged in part, the Chinese paper standard (CNS) A4 (210X297 mm) is not applicable to this paper size. Page 22 555981 A7 B7 (21) 5. The description of the invention will affect the damage. The detection function of other positions, that is to say, the detection of the rest of the touch panel will not be distorted by the damage. 5. Fast response speed, can quickly detect the touched position and area: This invention The detection method does not use the control switch to measure at all, but uses a continuous detection method. The central processing unit continuously measures the lower electrodes 46 and 47 of the resistance line 42 bis, so that the user can press the upper plate 4 In conjunction with the upper electrode 321, the position and area of the touched pressure are immediately detected. Compared with the previous detection method using a switch to measure, the detection method of the present invention is not only significantly better than the conventional design in terms of response speed. Moreover, the present invention does not use a switch for detection during the detection process, and no capacitive effect is generated between the upper and lower plates 3 and 4. 6. Compared with the conventional five-wire touch panel, the present invention can save manufacturing costs: Since the touch panel of the present invention only needs to perform etching or printing operations, a linear resistance line 42 is formed on the lower plate 4, and In practice, the function of detecting the user's touch position and automatically detecting the coordinate position can be achieved. Compared with the conventional five-wire method touch panel, the structure of the present invention is significantly simplified and simplified, and can save more. manufacturing cost. 7. The function of detecting the touch area has excellent application value in drawing. Because the user's touch activity is light or heavy, it is reflected in the detection results of the touch area detection according to the present invention. Obviously, it is the difference between the large and small pressure areas. Based on this, the design can use the difference in the weight of the pen to convert it into a difference in stroke thickness. That is, using the detection method of the present invention, it is possible to display different The thickness of the line reflects the lightness of the user's pen. This effect is more applicable to the previous touch panel design. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297). Page 555981 A7 B7 5 2. Description of the invention (22 see. To sum up, the continuous single-line touch panel and the detection method provided by the present invention have a small working current and uniform electric field distribution, so it is not necessary to consider the overlap angle of the upper plate and the lower plate. It has a fast response speed and can detect the contact pressure area. These effects are indeed incomparable to conventional designs, and they can indeed achieve the purpose of the invention. This is only a preferred embodiment of the present invention. When the scope of implementation of the present invention cannot be limited by this, that is, any simple equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the invention specification should still belong to The scope of the invention is covered by the table. Table 1 · Comparison table of calculation formulas of the coordinate values Xl, χ2, yi, y2 in the four calculation examples of the embodiment of the present invention. This paper size applies the Chinese National Standard (CNS) A4 specification 210 > < 297 mm) Page 24 555981 A7 B7 V. Description of the invention (23) [Comparison of component numbers] 3 Upper plate 421 Transverse impedance section 30 Contact point 422 Vertical impedance section 31 Board body 43 Short-circuit section 32 Conductive layer 44 First resistance section 321 Upper electrode 45 Second resistance section 4 Lower plate 46 First lower electrode 41 Plate body 47 Second lower electrode 42 Resistance wire 5 Spacer This paper is applicable to China National Standard (CNS) A4 (210X297) Centimeters) — page 25

Claims (1)

555981 A8 B8 C8 D8 Sixth, the scope of the patent application is multi-pressure measurement. There is a touch measurement. The board with the number to be counted can be fixed. The lower surface of the resistance board can be pre-fabricated. Place the line,,, and resistance at the line segment layer. The voltage stacking resistance is between the bottom of the vertical short board and the top of the bottom of the touch resistance resistor. The bottom of the top section controls the reactance to contact the resistance board. The single control of the covering layer which is covered by the line surface is electrically connected and is continuously touched one by one. There is this kind of fault, there is a gap between them, a normal board number and the horizontal impedance section, the touch position and the touch area. The detection method includes: (A) Continuously measuring the voltage at the two ends of the resistance line; (B) When the conductive layer of the pressure-contacted portion is shorted down to the resistance line, the resistance line is distinguished from one another. Calculate the short-circuit portion of the resistance value, and the first and second resistance portions from the two ends of the resistance line to the two ends of the short-circuit portion; (C) Find the resistance values of the first and second resistance portions ; (D) Find out what the first and second resistors respectively cover according to the resistance value of the first and second resistors. , The entire number of horizontal impedance sections, and the remaining number of horizontal impedance sections; (E) Convert the vertical coordinate values at the two ends of the short-circuit section according to the integer numbers of the longitudinal impedance sections respectively covered by the first and second resistance sections. And calculate the horizontal coordinate values of the two ends of the short-circuited portion based on the remaining number of horizontal impedance segments of the first and second resistance portions; and (F) estimate the contact based on the horizontal and vertical coordinate values of the two ends of the short-circuited portion. The area of the pressure part. 2. According to the method for detecting the touch pressure position and area of the continuous single-line touch panel described in item 1 of the scope of the patent application, when the paper size obtained in step (F) applies the Chinese National Standard (CNS) A4 specification ( 210X297 mm) Page 26 555981 6. The horizontal coordinate difference and vertical coordinate difference at the two ends of the road section of the patent application range are calculated based on the absolute value of the difference between the branch coordinate and the vertical coordinate difference. 2 The estimated value of the contact area; When the difference between the vertical coordinate difference and the vertical coordinate difference between the two ends of the short-circuited part is large, the square of the large coordinate difference is used as the estimated value of the contact area. • A continuous single-line touch panel, including: _ a lower plate with a plate body and a resistance line covering the factory top surface of the plate body, the resistance line has most of the vertical lines staggered = connected Transverse impedance sections and longitudinal impedance sections. These transverse impedance sections extend at intervals between two opposite sides of the lower plate, and the longitudinal impedance sections are respectively connected between the two ends of the transverse impedance sections to make the whole The resistance wire forms a single linear shape that is continuously bent and extended; an upper board for being pressed against, is located above the lower board, has a board body and a low-resistance conductive layer covering a bottom surface of the board body ^ When the upper plate is pressed downward, the conductive layer where the pressed portion is located is a predetermined number of transverse impedance segments shorted down to the resistance line; the number spacers are arranged at intervals between the upper and lower plates. When the upper board is not touched, the conductive layer is spaced above the impedance line of the lower board, and a central processing unit establishes the required action program by programming, by measuring two of the resistance wires Voltage between the terminal and the conductive layer to estimate the contact pressure Location and area. This paper size applies to China National Standard (CNS) A4 (210X297 mm) '— page 27