TW200421194A - Position detection method and device - Google Patents

Abstract

The present invention disclosed a position detection device and method for use in a plane surface to determine the position of a capacitive coupling device. Two arrays of row and column conductive wires form two layers on a substrate, said two layers are isolated by an insulated layer; between each two row wires there is a common row wire; between each two column wires there is a common column wire. Said common row and common column wires are connected to a common row terminal and common column terminal respectively. AC signal is applied to two adjacent wires sequentially to determine point P is between row k and row k+1, then AC signal is applied to row k only. Then applied to row k+1 only. To determine point P is near row k or row k+1. Finally, apply AC signal to common rows and then to all rows to determine point P is closed to row wire or common wire. Then repeats the above process for the columns. By combining the above processes the position in a two-dimensional space is determined. This method increases the accuracy of detection with less conductive row wires and column wires.

Description

200421194 V. Description of the invention (1) 1 · Technical field to which the invention belongs The invention relates to the detection of the coordinates of the position selected by the user. Special settings, can detect the position on a two-dimensional plane. A device and method for displaying on a plane: to provide coordinates of the position corresponding to: 'The present invention relates to a position detection device with fewer wires and more accurate results. 2. Prior art There are many existing technologies that provide detection of the position of a stylus on a plane. One of the technologies is-a vertical line of net under the surface or, for example, in a monitor of a computer monitor, to provide ten and ten bits as selected by the detection pen in Figure 1; two =: two: according to the required analysis Depending on the degree, columns 0 to N are formed. Another layer of wires 102 forms the 0th to Mth lines with the same or different pitches. Each wire is connected to the drive circuit of the wire selection multiplexer. The AC signals are sequentially added to column 0, column i to column N ^. Two types of devices using this type of technology are described in U.S. Patent Application Nos. 5 / 149,91 9 and 4/65 6,332, awarded to Green i as et al. This device sequentially applies a drive signal to one of a group of wires to determine its position. 'It will require a very small pitch and more wires to improve precision and accuracy.' It also requires more drive circuits to drive these. wire. The number of wires to be connected to this device is very large, and its complexity is not well welcomed in 2004. V. Invention Description (2). Although one of them has used the technique of grouping wires, its precision is still limited. When the AC signal is applied to column k, the other columns are set to zero potential (ie, ground potential). The parent current signal is then detected by a capacitive consumable element such as a detection pen. When the signal is detected, the position of the detection element is determined. After the column position is determined, the AC signal is added to the row and the same device is used to detect this signal. The position of the row can also be determined. Another technique is shown in Figure 2. A layer of conductive material 2000 has a resistance coefficient, and 3 or 4 separate contact points 201 are interconnected with the layer of conductive material. When a signal is applied to each contact point, the selected position is determined by the microprocessor's calculation of the signal received by the pen. Two devices using this technology were issued to David J. Conroy and Mark Flowers in U.S. Patent Application Nos. 5/877, 458 and 5/68 6, 70 5 Description. This device determines the position of the point by measuring the unique position indication signal and comparing it with the position information stored in the memory. This installation requires only 4 to 5 wires (one of which is for the detection pen). However, each system requires a very uniform resistive film 200 on the two blocks. This film requires very sophisticated product technology to be mass-produced. After deposition, it is also necessary to transfer position information or parameters for each series; and a very accurate analog digital converter (A / D) is required to ensure that the measured signal is accurately converted to position. And system, with less wires and more precise position information for position detection. And also need not be expensive and very accurate

• Page 7 200421194 V. Description of the invention (3) Method to produce this device. 3. SUMMARY OF THE INVENTION The object of the present invention is to provide an improved position detection method and device for determining a selected position on a plane. A second object of the present invention is to provide a position detection method and device, which use fewer wires to sense a position. Another object of the present invention is to provide a position detection method and device to improve the accuracy of position information. Another object of the present invention is to provide a position detection method and device, which is a reliable and inexpensive producer. The present invention teaches the construction of a device that uses fewer wires to sense a position while improving the accuracy of position information. A first aspect of the present invention teaches a position detection device for detecting the position of a capacitive coupling element on a plane, including at least: a row of wires and a row of wire arrays are separated by an insulating layer, the row of wires has a pitch c, there is a common column conductor between the column conductors at a distance of c / 2; the row conductor has a distance d, and a common row conductor between the row conductors

Page 8 200421194 V. Description of the invention (4) The distance between the line and the line of the line is d / 2; the common line of the line is connected to a common line joint; the common line of the line is connected to a common line joint, and one line is selected for decoding The driver and driver sequentially supply AC signals to the column and row conductors, and jointly row and common row conductors; supply a specific voltage level to the common conductors that do not supply the parent current 彳 §; and supply a specific DC voltage to the non-supplied AC Signal column or row conductors; an oscillator generates an AC signal voltage of the required frequency and amplitude and supplies the signal voltage to a microprocessor; the microprocessor supplies sequential signals to the line via a bus to select and decode And a driver; a capacitive surface-sensing element senses the detection signal at a point on a plane and transmits the detection signal to an analog-to-digital (A / D) converter via an isolation line; the A / D conversion The converter converts the amplitude of the detection signal into a digital signal processor and works with the microprocessor. Another embodiment of the present invention teaches a method for detecting a position on a plane 'has column and row wires and common wires between every two columns and every two rows, and these wires can be selectively connected to a line selection decoding And a driver, a signal oscillator, a microprocessor, and a capacitive coupling element placed at point p to pick up the detection signal, at least include the following steps: (a) adding AC signals to a common column on a page, and then Add a common column on another page, measure the signals v (2) and v (1) with a capacitive coupling element; (b) compare the sizes of v (2) and v (1) to determine the page to be detected Cc) Simultaneously apply AC signals to columns k and k + 1, where k = 1 to N, all other conductors are at a specific DC voltage and the common conductors are at a specific voltage level, coupled by a capacitor The component measures this signal as vk; (d) determines the good maximum value of v. If 200421194 V. Description of the Invention (5) ^ ------ vk is the maximum value, which is given by Jin Suntai > Between column k and column k + 1; (e) Add only ^^ th column 'all other specific DC voltages and common At-potential ^ voltage level potential 'measurement signal is vk, and then AC signals are added to column k + Ι, all other columns specific DC voltage and potential listed at a specific voltage level' measurement signal is V k + 1; Compare V k and vk + 1. If V k is greater than vk + 1, point P is closer to the k-th column. If Vk is less than Vk + 1, point P is closer to the k + 1 column. (F) plus the parent stream 彳 g. No. is in the common column, all other columns are in a specific DC voltage, the measurement signal is v 1; AC signals are added in all columns, and the common column is in a specific DC voltage, the measurement signal is v 2; comparing v 2 and v 1, If v2 / vl is greater than 1, point P is closer to ㈣; if v2 / vl is less than 1, point P is closer to the common column; (g) Repeat steps (a) to (0) for the row space. Finally repeat the above steps to detect The position of the row. Another aspect of the present invention teaches a method in which the space between the k-th column and the common column is divided into N-divisions, which are measured by storage experiments corresponding to different dielectric constant materials and different materials on the wire The v2 / vl ratio of each space of the thickness is determined by comparing the v2 / vl ratio obtained from the detection and the stored value. The above and other objects and advantages of the present invention can be more fully understood by referring to the following reference drawings and the description of the preferred embodiment.

Page 10 200421194 V. Description of the invention (6) Figure 3 is a cross-sectional view of a lead plate and a detection pen according to an embodiment of the present invention, and Figure 4 is a line of conductors and a common line according to a first embodiment of the present invention Arrangement of wires. Please refer to FIG. 3, the conductor plate 300 for position detection is manufactured by screen printing, deposition method or electric clock method, and the conductor layer of the line conductor is made on the substrate 3 0 1 'this conductor layer is, for example, tin or copper' The conductive layer of the pair / child product is etched to form a row of wires 31 and a common row of wires from the 0th row to the Mth row. After the insulating layer 3 0 2 is formed, another conductor layer is formed on the insulating layer 3 0 2 by the same method to form a column conductor 3 0 6 and / or a common row conductor from the 0th column to the Nth column. CR) 308. The last insulating layer is formed on the column and common column wires. The position of a point P is detected by a capacitive coupling element 103, which is connected to an amplifier via a line 104 (shown in FIG. 11). In this embodiment, the levels of the column conductors and the row conductors are interchangeable. For example, column wires can be on the bottom and row wires on the top. This wire can be connected to a wire selected decoder and a driver (as shown in Figure 11) to sequentially supply an AC signal to each wire for detection by the capacitive coupling element 103.

Figure 4 shows the layout of columns K-1 to K + 3, 30 6 and common column 3 08. The common column is added to the middle point between each pair of columns. Can be reduced to half while still maintaining the same position picking accuracy.

Page 11 200421194 V. Explanation of the invention (7) and the total display of the figure is not according to one of the examples of the above data. 'Add an AC signal to the list, and the zero-potential sequence. ° In Figure 5, the AC signal With the tip of the table pointing to the p point, Miao, ^ ^ the first column and keep the right 1 # 丨 The two moxibustion gates add the 乂 / 仏 仏 number in 苐 〇 and Leijiao-Ren-7 are listed. The lead and the common column lead are at zero potential, and H = 2. For example, a Russian stylus measures the AC signal as VI, then adds the cross column and the second column, and measures the signal as v2, · · · =

HrAvk is the largest 'then the position of the electric coupling element is in the κ column and the third = 3: Secondly, refer to the Λ " 5 ") map and 5 (〇, 〇' '', the crime is still near the k-th column. Near the k + 1th column, add the AC signal to the dagger ", while holding the other columns and the common column to zero potential, as shown in Figure 5 (B), the signal is vk, and when the AC signal is added to the k + 1 Column and keep JL and other columns at zero potential. As shown in Figure 5 (c), measure its signal as vk + Ι compare vk and vk + 1. If # is greater than vk + 1, p point is close to The k 歹 j 'conversely' point p is +1. The accuracy has been doubled since this example, because we can decide whether m is close to the k-th column or k + Ι ', that is, in There are two regions between columns κ and k + Ι. Then, assuming that point P is close to column k, you can continue to decide whether point p is close to the common column wire or column k. Add an AC signal to the common column and keep it All column wires are at zero potential, and the signal is measured as v 1, as shown in Figure 5 (D). Then add an AC signal to all column wires and keep the common column wires at zero potential, and measure their signals. Is v 2, as described in Section 5 (E) shown in FIG. If v 2 / v 1 >. Bu line near the point P K-th column, whereas, if v2 / vl < 1, P near the point-based co

200421194 V. Description of the invention (8) Its precision can be determined in the same line. According to this embodiment, a common row can be inserted between the rows to increase the disc size by 4 times. That is, 4 different positions are determined between the K-th column and the k + 1-th column.

FIG. 6 is a flowchart of a position detection method according to an embodiment of the present invention. Figure 6A shows the process of determining the spatial position of a column. The measurement starts at & Electric Valley light-closing element refers to point P, at step 6 〇1, so that k = 〇, and at step 6 〇2, the parent stream and the number are added to column k and k + 1, The other columns and common columns are at zero potential. The signal measured by the capacitive coupling element is vk. At step 6 〇3, determine whether k = N-1. If not, make k = k + l and return to step 602 until k = N-1. Then, find the maximum value of vk at step 6 0 4 And go to step 6 05, now know that the point P is between the k-th column and the k + 1 column. At step 6 06, add the signal to the k-th column, the other columns and the common column are at zero potential, measure vk, and then step ”

6 〇7 'Add the AC signal to the k + 1th column, and the other columns and common columns remain at zero potential.' Measure vk + 1, in step 608, determine whether vk + I is greater than vk. If so, point P is close to k + 1 Column. In order to determine whether the point P is close to the common column or the k + 1th column, proceed to step 6 1 0, add AC signals to the common column, keep all the wires at zero potential, and measure the signal v; l, at step 611, add the AC signal 1 In * all columns of conductors keep the common column at zero potential, the measurement signal is v2, U compares V2 and vl at + = ^ 12, and determines whether v2 / vl is greater than 丨, if yes, series = m, near the common column . Now return to h 6 0 8. If v k + 1 is less than v k, Cheng Yiben will stop at time a, r ". In order to determine that the point P is close to the common column = soil, and the point P is close to the K 6 1 6, add an AC signal to the common column, 疋 * near the k column ’to the step to keep all the conductors at zero potential,

200421194 V. Description of the invention (9) Measure v 1; and then in step 6 1 7, add the AC signal to all the columns and keep them at the common potential at zero. The measurement signal is v 2 and then decide whether v 2 / V1 is greater than 1. If yes, point P is near the k-th column; if not, point P is near the common column. The measurement then enters the A contact. This method can be further divided into 3, 4, 5, 6, 7 ··· equal divisions between common columns and columns. Figure 7 shows an example where the space between the common column and the column is divided into four equal parts. If the ratio v2 / vl is based on different dielectric constant materials and different thickness materials, it corresponds to the space between the two wires. 2. Space 3, Space 4, but decided in advance, as shown in Table 1, store this ratio in the controller for comparison, and then Table 1 v2 / vl a 1 a2 a3 a4 Space 1 2 3 4 Test $ The ratio of v 2 / v 1 can be compared with the stored value to determine the position in that space. For example, if v 2 / v 1 ~ a 2, the p point is located in space 2 and so on. Detian ’, a flowchart for determining the precise position between two wires. Referring to Figure 6, the private sequence arrives at step 6 0 9 or 6 1 5. Point P has decided to be close to the κ column, then proceed to step 801, add the AC signal to the common column and keep all

Page 14 200421194 V. Description of the invention (10) Column leads are at zero potential, and the measurement signal is V 1; then in step 803, add AC signals to all column leads, and keep the common columns at zero potential, and the measurement signal is v 2 'Then use the v2 / vl ratio stored in step 805 in step 807. If v2 / v is a2, then the P point is located in space 2, and so on. Finally, the end of the program 0 determines the position of the P point in the column array. Later, the same procedure can be used to determine the position of point P in the row array. Referring to FIG. 6B, the detection starts at the a contact, and the same procedure in the column space is used to determine the position of the capacitive coupling element in the row space. ^ Combined with the positions detected by the column array and the row array, the position of the capacitor surface-on-element on the plane can be determined. In one embodiment of the present invention, the AC signal may not necessarily be at zero potential, and the AC signal may not be at any specific (zero potential), DC, AC, etc. The signal may not be at zero potential. Rows and wires are not added. The voltage level of the common column, common row, and wire is, for example, grounded. The row and column conductors are not supplied with AC to any specific DC voltage. FIG. 9 is a plan view showing the arrangement of columns 仃, common columns, and total weights y Η 〆 and PJ evening 之一 in one embodiment of the present invention. The column array 308 and the row array 3 are arranged as an array horizontally and the row array vertical. The figure also shows a total of g peers 3 1 3. J d 1 ^ ^

Page 15

200421194 V. Description of the invention (11) Figure 10 shows a block diagram of a position detection system 800 according to an embodiment of the present invention. The network matrix includes a network matrix of different pages. In this embodiment, there are a first page 812 and a second page 814. Each page has its column array (R0 to RM), row array (C0 to CN), and common columns (CR1 and CR2), common line (CC1 and CC2). Obviously, only two wires (CR2 and CC2) are needed to add one page. These lines are connected to the position detection system 8 1 0 to sequentially add AC signals and are coupled by capacitors. The element senses the detection signal to determine the position of the capacitive coupling element. 0 To determine which page of the capacitive coupling element, an AC signal is sequentially added to common R2 (CR2) and common R1 (CR1), and then the corresponding signals are measured. v (2) and v (1), after comparing the size of the received signal, the page number of the capacitive coupling element can be determined. In another embodiment of the present invention, the page number may also be determined by sequentially adding an AC signal to the common Cl (CC1) and the common C2 (CC2). FIG. 11 is a structural diagram of a position detection and signal driving system according to an embodiment of the present invention. The wire plate 300 is represented by 5 columns (R0, in, R2, R3, and R4) and 5 rows (CO, Π, C2, C3, and C4). The column and row wires are connected to the first-line selection decoder and driver 9 0 2. The driver sequentially supplies AC signals to the column and row conductors, and supplies common column and row conductors. An oscillator 9 0 4 generates an AC signal voltage of the required frequency and amplitude and supplies the signal voltage via a wire 9 0 5 to a microprocessor 9 0 7 which

Page 16 · 200421194 V. Description of the invention (12) Supply this sequential signal to the line selection decoder and driver 9 0 2 via the bus 9 0 3;-Capacitive coupling element such as a detection pen 1 0 3 at p The point senses the signal and transmits the signal to an amplifier 9 0 8 via an isolation line 104. The output of the amplifier 9 0 8 is sent to an amplitude detector 9 1 0, which will The signal is sent to an analog-to-digital converter 9 1 2 via the wire 9 11. The analog-to-digital converter 9 1 2 communicates with the microprocessor. The detected signal is analyzed by the microprocessor 906. The result is a position data output of 9 0 7. Although the present invention has been disclosed with specific embodiments, those skilled in the art will understand that the form and details of this specific embodiment may be slightly changed, and modifications and changes made without departing from the spirit and concept of the present invention are all The scope of the invention, the above-mentioned embodiments of the present invention are for illustrative purposes only, and are not intended to limit the scope of the attached patent application.

------ Page 17 ---- 1 200421194 --- _ Brief description of the diagram 5. Brief description of the diagram The first diagram (previous technique) is the layout of the row and column conductors on the second floor and the p Point of detection pen. "Figure 2 (previous technique) is a conductor material 2000 with four contact points and a detection pen at point P. Figure 3 is a cross-sectional view of a lead plate and detection pen according to an embodiment of the present invention Fig. 4 is a layout diagram of a column conductor and a common column conductor according to an embodiment of the present invention. Fig. 5 (A) (B) (C) (D) (E) shows an embodiment of the present invention. The order on the conductors of the intersection, flow, and common and common columns. FIG. 6A is a flowchart of a method for detecting spatial position of a column according to an embodiment of the present invention. FIG. 6B is one of the methods according to the present invention. The flowchart of the row space position detection method of the embodiment. Fig. 7 shows that a more precise position is determined between the same row and the k-th column according to an embodiment of the present invention. Fig. 8 determines the precise position between two wires. FIG. 9 is a plan view showing the arrangement of rows, rows, common columns, and common rows according to an embodiment of the present invention. FIG. 10 shows a position measurement of two or more pages according to an embodiment of the present invention. Block diagram of system 800. Fig. 11 Position detection and signal driving system according to an embodiment of the present invention All

Page 18 200421194 904 906 908 910 912 914 System Structure diagram for simple illustration. Explanation of symbols: 1 0 1 column of wires 1 0 3 capacitive coupling element 2 0 0 conductor material 2 0 2 wires 3 0 1 substrate 3 0 4 insulation layer 3 0 8 common column wires 3 1 2 common column 601-620 step 8 0 0 Position detection system 8 0 2 lead 8 1 0 Position detection system 808 lead 814 Page 2 9 0 3 bus 9 0 5 lead 9 0 7 Position data output 9 0 9 lead 9 11 lead 9 1 3 lead 11 0 0 Position detection and signal drive 1 0 2 rows of wires 1 0 4 isolated wires 201 contact points 3 0 0 wire plates 3 0 2 insulation 3 0 6 columns of wires 311 rows of wires 3 1 3 common rows 6 0 Γ-6 2 0 ' Steps 801, 803, 805, 807 Step 8 0 4 wires 8 0 6 wires 812 page 1 9 0 2 wire selection decoder and driver oscillator microprocessor amplifier amplitude detector analog to digital converter wires ❿

Page 19

Claims (1)

200421194 6. Scope of patent application 1. A position detection device for detecting the position of a capacitive coupling element on a plane, including at least: a column of conductors and a row of conductor arrays are separated by an insulating layer, the column The conductors have a distance c, and a common column conductor between the column conductors has a distance of c / 2 from the column conductors; the row conductor has a distance d, and a common row conductor between the row conductors has a distance from the row conductors of d / 2; the common line conductor is connected to a common line connector; the common line conductor is connected to a common line connector; a line selection decoder and driver sequentially supply AC signals to the column and line conductors, and And common line conductors; supply specific voltage levels to common conductors that do not supply AC signals; and supply specific DC voltages to column or row conductors that do not supply AC signals; an oscillator generates the AC signal voltage of the required frequency and amplitude and Supply the signal voltage to a microprocessor; the microprocessor supplies sequential signals to the line selection decoder and driver via a bus; A capacitive coupling element senses the detection signal at a point on a plane and transmits the detection signal to an analog-to-digital (A / D) converter via an isolation line; the A / D converter converts the detection The amplitude of the signal is a digital signal and communicates with the microprocessor. 2. If the position detection device of the scope of patent application No.1, where Page 20 200421194 VI. Scope of patent application. Detecting device system 3. If applying for debt measurement device 4. If applying for line is metal. 5. If the application line is transparent metal 6. If the application line is screen printed 7. If the application line is deposition method 8. If the application line is plating method 9. If the application line is formed in plastic only by the column and common Column Constructor. The position detection device of the first scope of the patent, in which the bit is only composed of lines and common lines. The position detection device of the first scope of the patent, wherein the position detection device of the first scope of the patent, wherein the oxide is introduced.位置 The position detection device of the first scope of the patent, wherein the guide brush is formed. The position detection device of the first scope of the patent, the guide forms 0 The position detection device of the first scope of the patent, the guide forms. The position detection device of the first scope of the patent, wherein the adhesive substrate is on the substrate. 10. The position detection device according to item 1 of the scope of patent application, wherein the guide 200421194 6. The scope of patent application The line is formed on a glass substrate. 11. The position detection device according to item 1 of the patent application scope, wherein the wire is formed on a flexible substrate. 1 2 · The position detection device according to item 1 of the scope of patent application, wherein the specific voltage level and the specific DC voltage are ground potentials. 1 3. The position detection device according to item 1 of the patent application scope, wherein the specific voltage level is a DC voltage. 1 4. The position detection device according to item 1 of the patent application scope, wherein the specific voltage level is an AC voltage. 1 5 · —A method for detecting position on a plane, with column and row wires and common wires between every two columns and every two rows, these wires can be selectively connected to a line selection decoder and driver, A signal oscillator, a microprocessor, and a capacitive coupling element are placed at point P to pick up the detection signal. At least the following steps are included: (a) adding an AC signal to a common column on a page, and then adding it to another Page, measure the signals v (2) and v (1) with a capacitive coupling element; (b) compare the sizes of v (2) and v (1) to determine the number of pages to be detected; (c) add AC at the same time Signals are in columns k and k + 1, where k = 0 to Page 22 200421194 VI. Patent application scope N-1. The potential of all other columns and common columns at a specific voltage level. The signal is measured by a capacitive coupling element as vk; (d) Determine the maximum value of vk, if vk is the maximum value, this position is between the k-th column and the k + 1 column; (e) only the k-th column of the AC signal is added, all other columns are listed at a specific DC voltage, and are collectively listed at a specific voltage level, The measurement signal is vk, then the AC signal is added to column k + 1, all others are listed at a specific DC voltage, and are listed at a specific voltage level together. The measurement signal is vk + 1; compare vk and vk + 1, if vk is greater than vk + 1, point P is near the k-th column, if vk is less than vk + 1, point P is near the k + 1 column; V (f) plus the AC signal in the common column, all other columns are at a specific DC voltage , The measurement signal is v 1; add the AC signal to all columns, and the common column is at a specific DC voltage, and the measurement signal is v 2; compare v 2 and v 1, if ▽ 2 / ¥ 1 is greater than 1,? The point is near column 1 ^; if ¥ 2 / ¥ 1 is less than 1,? Points are near common columns; (g) Repeat steps (a) to (f) for row space. 16. The method according to item 15 of the scope of patent application, wherein the specific voltage level and the specific DC voltage are ground potentials. _ 1 7. The method according to item 15 of the scope of patent application, wherein the specific voltage level is a DC voltage. 18. The method of claim 15 in which the specific voltage is applied Page 23 200421194 6. Scope of patent application The level is AC voltage. 19 · According to the method of item 15 in the scope of patent application, the space between the k-th column and the common column is divided into N equal parts, and different dielectric constant materials and different thicknesses on the wire are measured by storage experiments. The ¥ 2 / ¥ 1 ratio of each space η of the material is determined by comparing the ¥ 2 / ¥ 1 ratio and the stored value to determine its position. P.24