TW201128470A - Touch panel with resistance compensation function - Google Patents

Abstract

The present invention relates to a touch panel with resistance compensation function, which comprises: a scan bus, coupled to a plurality of scan lines, used for scanning a touch screen; a detection bus, coupled to a plurality of detection lines, wherein the detection lines are respectively interlaced with the scan lines, and the detection lines are used for detecting at least one touch position of the touch screen; a control unit, coupled to the scan bus and the detection bus, used for controlling the scan bus and the detection bus; a plurality of scan compensation resistance elements respectively coupled between the scan lines and the scan bus; and a plurality of detection compensation resistance elements respectively coupled between the detection lines and the detection bus, such that signal levels from different touch positions received by the control unit are the same. Therefore, the touch panel can detect the strength of pressure, so as to increase the usability of the touch panel, as well as to increase the resolution of the touch panel, thereby improving operation linearity.

Description

201128470 VI. Description of the Invention: [Technical Field] The present invention relates to a touch panel, and more particularly to a touch panel having an impedance compensation function. [0002] [Previous technical standards] According to recent years, all kinds of electronic products are constantly moving towards simple operation, small size and large screen size, especially for portable electronic products, which require more volume and screen size. strict. Therefore, many electronic devices integrate the touch panel with the liquid crystal display panel to omit the space required for the keyboard or the control buttons, thereby expanding the configurable area of the screen. Currently, touch panels can be roughly classified into resistive, capacitive, infrared, and ultrasonic touch panels. Among them, resistive touch panels and capacitive touch panels are the most common products. In the case of capacitive touch panels, the multi-touch feature provides a more user-friendly operating mode, making capacitive touch panels increasingly popular in the market. However, the capacitive touch panel must be touched with a conductive material to operate the touch panel so that the user cannot operate with gloves or non-conductor materials. In the case of a resistive touch panel, no matter which medium the user touches the touch panel, the operation can be performed, thereby improving the convenience of use of the touch panel. In addition, the resistive touch panel requires lower cost and the resistive touch panel technology is more mature, resulting in a higher market share. Please refer to the first figure as a schematic diagram of the structure of the touch panel of the prior art. As shown, the touch panel package - scan bus 1 0 ', a detection bus 20' and a control unit 30'. The scanning bus bar 10' 099102747 is coupled to a plurality of scanning lines 11 ′ for scanning a touch form number A0101 page 3 / 21 pages 0992005290-0 201128470 screen, detecting the bus bar 20, coupled a plurality of detection lines 21, the scan lines 11 are interleaved with the detection lines 21, and the scan lines are located at different layers from the detection lines 21, and the scan lines are The detection unit 21 is configured to detect at least one touch position of the touch screen, and the control unit 30 is coupled to the scan bus 1 and the detection bus 2 to control the scan bus 10, and The bus bar 20 is detected, and it is known that at least one position in the touch screen is touched. As mentioned above, whether it is a capacitive or resistive touch panel, especially in multi-touch system applications, multi-touch effects are often achieved by a gridded (gr丨d) touch panel architecture. That is, the scan lines are formed, and the detection lines 21 form a gridded touch panel structure. Due to the scan lines 11 or the detection lines 21, different touch positions on the touch panel may have different impedance values due to different paths. This is a congenital disadvantage of the touch panel. As shown in the figure, since points a and B are different in the detection line 21 and the length of the traces, the equivalent resistance values must be unequal in magnitude, so that the two points of the same point can be applied by the same size. , also get different potential output. Taking a multi-point resistive or multi-point piezoelectric touch panel as an example, after applying equal pressures, points A and B point to the apostrophe seen by the control unit 30 (the voltage signal reading end). Point A will get a voltage greater than point B. This is because the impedance of 8:099102747 is less than point B (the resistance in the X direction of point A is less than the defect). Based on the above-mentioned 'multi-point resistive or multi-point piezoelectric touch panel, since there is a scanning line for different paths, and the difference of the resistance value of the detecting line 21' is compensated, it will result in Under the same force, different roads will get different electrical waste values, so that the control unit 3G, (voltage signal reading end) can only judge that there is a form number on the touch panel A0101 page 4 / 21 pages without signal Input, but can't be more powerful than 0992005290-0 201128470, so it is impossible to judge the pressure in the direction of the ,, and thus limit the application range of the touch panel. Another disadvantage is that the resolution of the touch panel is limited to the scan 11 and the resolution of the detection line 2 Γ matrix itself, and the position of the center of gravity of the actual touch cannot be obtained by the (4) 彳f operation, and the touch linearity is poor. SUMMARY OF THE INVENTION [0003] One of the objects of the present invention is to provide a touch panel with an impedance compensation function, which is capable of compensating for complex scan lines and complex detectors, respectively. The P of the line and the value of the resistance make the signal level of the control unit 7C receiving different touch positions the same, so that the touch surface is high, and the pressure is large, 1, thereby increasing the usability of the touch panel. The object of the present invention is to provide a touch panel with an impedance compensation function, which is characterized in that the resistance value of the complex scanning line and the complex lying line is compensated by the Wei material compensation element and the complex number. According to the impedance value of the scan line and the _ line of the (4) path, the impedance compensation is performed, so that the signal levels of different touch positions received by the control unit are the same, so as to increase the linearity of the touch batch. The resolution of the touch panel' and the touch panel with the impedance compensation function of the present month, including the bus bar, a detection bus bar, the protection device _ the knowledge component and the complex detection debt impedance transfer Second, the complex scanning compensation resistance scanning line is used for scanning-touching (four) to connect the plurality of measuring lines, the "two connected multiple", measuring at least the touch screen - the touch position, the 4 _ line is the row and the detection of the convergence tillage, to work early Coupled Scanning Confluence 099102747 Form Weifang No. #汇流#和_汇流排,·0992005290-0 201128470 Some scanning compensation impedance components are respectively connected between the scanning lines and the scanning busbars; The components are respectively coupled between the detection lines and the detection busbars, so that the signal levels of the different touch positions received by the control unit are the same. In this way, the touch panel can detect the pressure, thereby increasing the usability of the touch panel, increasing the resolution of the touch panel, and improving the linearity of operation. [Embodiment] [0004] For a better understanding and understanding of the structural features and the efficacies of the present invention, the preferred embodiment and the detailed description are as follows: The second figure is a schematic structural view of a touch panel according to a preferred embodiment of the present invention. As shown in the figure, the touch panel with impedance compensation function of the present invention comprises a scanning busbar 10, a detecting busbar 20, a control unit 30, a plurality of scanning compensation impedance components 40 and a complex detection compensation impedance component 42. The scan bus 10 is coupled to the plurality of scan lines 12 for scanning a touch screen 50. The detection bus 20 is coupled to the plurality of detection lines 22, and the detection lines 22 respectively interleave the scan lines 12. The detection line 22 detects at least one touch position 52 of the touch screen 50, wherein the scan lines 12 and the detection lines 22 are located at different layers, and the scan lines 12 and the debt lines 2 2 A non-conductive object such as a spacer or a glass (G 1 ass) or a film (fi lm) is used as a space interval (not shown) to form a touch screen 50. The above is a technique well known to those skilled in the art and will not be described here. Furthermore, the scan lines 12 and the test lines 22 are a conductive film, and a preferred embodiment of the conductive film is a Transparent Conductive Oxide (TCO) film or an electrically conductive material. . 099102747 Form No. A0101 Page 6 of 21 0992005290-0 201128470 The multi-touch effect m is achieved by using the grid touch panel architecture, which is only one preferred embodiment of the present invention. The invention is not limited to such a touch panel architecture. Any touch panel formed using a conductive film is within the scope of the present invention. The control unit 30 is coupled to the scan bus 1 〇 and the detection bus 20 ′ to control the scan bus 1 〇 and the detection bus 2 〇, that is, the control unit 3 controls the scan bus 1 to drive the scan lines. 12 scanning the touch screen 5 〇, and the control detection bus 20 drives the detection lines 22 to detect the touch screen 50 ′. Therefore, the control unit 30 can scan the touch screen 20 according to the scan lines 12 and the The detection line 22 detects the touch screen 50 and knows the touch position 52. In addition, the scanning busbar 1 is equivalent to a voltage/current signal input terminal, and the detecting residual busbar 20 is equivalent to a voltage/current signal reading terminal, so that the control unit 30 can input the electrical waste by scanning the busbar 1 The current signal is sent to the touch screen 50, and then the voltage/current signal corresponding to the scan bus 1 is read through the detection bus 2, and at least one touch position 5 2 is known.

099102747 The scan compensation impedance components 40 are respectively coupled between the scan lines 1 2 and the scan cup bus 1 , and the detection compensation impedance components 42 are respectively coupled to the detection lines 22 and the detectors Between the bus bars 20, the control unit 3 receives the same signal position of the different touch positions 52, wherein the scan lines 12 and the detection lines 22 are transparent conductive oxide films. The transparent conductive oxide film may have different impedance values for different lengths. Therefore, the impedance values of the scanning compensation impedance element 40 and the price compensation compensation impedance element 42 are far greater than the scanning line 丨2 or the town line 22, respectively. The impedance value is such that when the touch position 52 is located at different positions on the scan (four) 12 or the line 22, the impedance values obtained by detecting the bus bar 2〇 (voltage/current signal read end) are different, so that Control unit 3 () through the predicate form number A0101 page 7 / a total of 21 pages 0992005290-0 201128470 The measurement signal received by the flow block 20 is the same, that is, control grass -

〇 U The received voltage signal or current signal has the same level. In this way, the touch panel can detect the pressure and increase the touch panel. The impedance values of the scan compensation impedance component 40 and the detection compensation resistance component 42 are both greater than 1 〇〇 0 ohm (ι ΐ Ω), and the impedance of the ohmic impedance component 40 and the detection compensation impedance component 42 are The larger the value, the closer the impedance value of the different touch positions 5 2 in the scan line 12 or the detection line 2 2 is. In addition, the scan compensation impedance elements 40 and the detection compensation impedance elements 42 are made of a resistive material or a field effect transistor Γ leld

Effect Transistor (FET) or a Bipolar Junction Transistor (BJT). Please refer to the third figure as a structural schematic diagram of a touch panel of another preferred embodiment of the present invention. As shown in the figure, the difference between the embodiment and the embodiment of the first embodiment is that the scan compensation blocking component 40 and the detection compensation impedance component 42 of the embodiment are respectively disposed on the scan # bus bar 10 . The scan compensation impedance elements 4 are located in the scan bus bar 10, and the scan compensation impedance elements 4 are respectively coupled to the scan lines 12 to compensate the scan lines 12 Similarly, the detection compensation blocking element 42 is located in the detection bus 2 ,, and the detection compensation impedance elements 40 are respectively connected to the detection lines 2 2 to compensate The impedance values of the lines 22 are detected. Other technical features have been described in the previous embodiment and will not be further described herein. Please refer to the fourth figure, which is a structural diagram of a touch panel according to another preferred embodiment of the present invention. As shown in the figure, the present embodiment differs from the above embodiment in that the scanning compensation impedance elements of the present embodiment are 〇099102747, form number A0101, page 8/21 pages, 0992005290-0, 201128470, and the detections. The compensation impedance element 42 is controlled according to the distances of the scanning lines 2 from the scanning bus bar 10, and the detecting lines 22 are far from the detecting bus bar 20, and the scanning compensation impedance elements are controlled. The magnitudes of the impedance values of the detectors and the dampers' impedance components are as shown in the fourth figure. If the top left of the touch screen 50 is used as the scan/detection start point, then The impedance values of the scan compensation impedance elements 4 on the scan line 12 are decremented from left to right, and the impedance values of the detection compensation impedance elements 42 on the detection lines 22 are decremented from top to bottom. That is, the sweeps on the scan line 12

The impedance value of the compensation impedance element 40 is gradually decreased from 8R to R by 8R, and the impedance values of the detection compensation impedance elements 4 该 on the detection lines 2 are gradually increased from 8R to 8R. Subtract to R. In this way, different touch positions 52 on the touch screen π can be compensated according to the distance between the scan bus 1 and the detection bus 20, that is, when the touch screen 5 is on the screen Three touch positions: Α, Β and C. Since the touch position of the eight points is closer to the scanning/detecting position of the scanning bus 1〇 and the detecting bus 2〇, the point A is The scan line 12 and the detection line 22 where the touch position is located are relatively short, and the impedance values of the scan line 12 corresponding to the person point and the compensation compensation element 40 of the debt test (4) and the compensation compensation impedance element 42 are compared. Large, the same as the 'c point touch position distance scan bus 1 〇 and the detection scan / detection position of the detection bus 20 is far, so the c-point touch position of the scan line 12 and detection The line 22 is relatively long and the scanning line corresponding to the point C} 2 and the scanning compensation impedance element of the price line 22 and the compensation compensation element 42 are relatively small, and the knee scanning compensation impedance element 4 The compensation impedance value of the compensation compensation impedance component 42 is between A and C. Between the above, the present embodiment can have different impedance values according to the scan lines and the detection lines of different paths, so that the 099102747 form number A0101 page 9 / Du 91 hundred Λ M 0992005290-0 201128470 control unit 3 〇 pull 1 ^ The different touch positions of the money are the same, the resolution of the control panel, and the linearity of the operation. And by ^, single tl30 because the signal level of receiving different touch positions 52 (4)' enables the touch panel to detect the pressure, thereby increasing the usability of the touch panel. In addition, when the setting position of the right scanning busbar 10 or the detecting busbar 20 is changed, the impedance values of the scanning compensation impedance element 40 and the debt compensation impedance components 42 are swept with the bus bar 1 (). Or the distance between the distances of the bus lines is adjusted, and there is an adjustment, that is, when the scanning bus 1G sets the bottom of the touch screen 5 (not shown) and the detecting bus 20 is set to the touch surface 50 On the right side, when the lower right side of the touch screen 5 is used as the measurement starting point, the impedance values of the scanning compensation impedance elements 扫描 of the scanning bus 1 are decremented from right to left; the detection bus The impedance values of the detection compensation impedance elements 42 are decremented from bottom to top. Please refer to the fifth drawing, which is a schematic structural view of a touch panel according to another preferred embodiment of the present invention. As shown in the figure, the difference between the embodiment and the embodiment of the fourth embodiment is that the scanning compensation impedance component 40 and the detection compensation impedance component 42 of the embodiment are respectively disposed on the scanning busbar 10 . And the scanning compensation impedance component 4 is located in the scanning busbar 10, and the scanning compensation impedance components 4 are respectively coupled to the scanning lines 12 to compensate the scanning lines. Similarly, the detection compensation impedance component 42 is located in the detection busbar 2, and the detection compensation impedance component 42 is coupled to the detection lines 2 2 to compensate the These detect the impedance value of line 22. Other technical features have been described in the embodiment of the fourth figure and will not be further described herein. In addition, please refer to the other figures of the present invention as another preferred embodiment of the present invention. 099102747 Form No. A0101 No. 0 page / Total 21 pages 0992005290-0 201128470

Schematic diagram of the touch panel. As shown in the figure, the present embodiment is different from the above-described embodiment. In the embodiment, the scan compensation impedance elements 4 between the scan bus bars 10 and the scan lines 2 are respectively added. The scan compensation impedance greater than 1 〇〇 0 ohms (lkQ), that is, the scan compensation impedance components 4 耗 respectively consume a plurality of first compensation impedance elements 44 ′ 5 the impedance values of the first compensation impedance elements 44 are greater than 1 〇〇〇 ohm (1 k Ω). Similarly, the detection compensation impedance elements 42 between the debt measurement bus 2 〇 and the detection lines 2 2 are more than 1 分别 respectively. The scan compensation impedance of the lk ohm (lkD), that is, the detection compensation impedance elements are respectively coupled to the plurality of second compensation impedance elements 46, and the impedance values of the first compensation impedance elements 46 are greater than 1 ohm ohm. kQ). This can increase the performance of the touch panel. Further, other technical features have been described in the above embodiments, and therefore will not be further described here.

Please refer to the seventh figure, which is a structural diagram of a touch panel according to another preferred embodiment of the present invention. As shown in the figure, the difference between the embodiment and the embodiment is that the touch panel of the embodiment has a plurality of compensation impedance elements 60, and the compensation impedance elements 6 are respectively coupled to the scan lines 12 Between the scanning bus bar and the detecting bus bar 2 and the detecting bus bar 2 。. In this embodiment, the compensation impedance elements 60 are disposed between the scan bus 1 〇 and the scan lines 12, and the touch surface 50 has two touch positions of D and E, j The impedance value of the touch position is 2R+X 'E. The impedance value of the touch position is 3R + 2X, so the impedance value between the touch position of the D point and the touch position of the E point is different from R + χ, so ' The compensation impedance elements 60 can compensate for the D touch position, that is, compensate the R + X impedance value at the D touch position. Thus, the complex compensation impedance component 60 of the present embodiment only needs to be disposed between the scan lines 12 and the scan sink 099102747, the form number A0101, the 11th page, the total 2 page, the page 0992005290-0, the 201128470 row 1 0, or the · Between the detection line 2 2 and the detection bus 20 , as long as the impedance value of the compensation impedance component 60 on the scan screen 50 and the impedance of the farthest touch position at the far end of the scan start are scanned. The values are the same. Please refer to the eighth embodiment, which is a schematic structural view of a touch panel according to another preferred embodiment of the present invention. As shown in the figure, the embodiment is different from the embodiment of the seventh embodiment in that the compensation impedance elements 60 of the embodiment are disposed between the scan bus 10 and the scan lines 1 2 and detected. Between the bus bar 20 and the detection lines 22, taking the seventh figure as an example, the impedance difference between the D touch position and the touch position is R + X, and the scanning bus in this embodiment is located. The compensation impedance elements 60 of 10 and the impedance values of the compensation impedance elements 60 located at the detection bus 20 may be added as R + X. In addition, the compensating impedance element 60 of a larger impedance value may be used to make the touch point of the D point the same as the impedance value of the touch point. In summary, the touch panel with the impedance compensation function of the present invention is coupled to the scan bus and coupled to the plurality of scan lines for scanning a touch screen; the detection bus is coupled to the plurality of detection lines, and the detectors are coupled to the plurality of detection lines. The test lines respectively interlace the scan lines, and the detection lines detect at least one touch position of the touch screen; the control unit is coupled to the scan bus and the detection bus to control the scan bus and the detection bus; The scan compensation impedance elements are respectively coupled between the scan lines and the scan block, and the test compensation impedance elements are respectively coupled between the detection lines and the detection bus bars. In this way, the touch panel can detect the pressure, thereby increasing the usability of the touch panel, increasing the resolution of the touch panel, and improving the linearity of operation. The invention is a novel, progressive and available for industrial use, and should meet the requirements of the patent application stipulated by the Chinese Patent Law. 爰099102747 Form No. 1010101 Page 12/Total 21 Page 0992005290-0 201128470 Inventing a patent application, the Prayer Bureau will grant a patent at an early date, and it is a prayer. However, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and the shapes, structures, features, and spirits described in the claims are equivalently changed. Modifications are intended to be included in the scope of the patent application of the present invention. [Simple description of the map] [0005] Ο

G

The first figure is a schematic structural view of a touch panel of a prior art; the second figure is a schematic structural view of a touch panel according to a preferred embodiment of the present invention; FIG. 4 is a schematic structural view of a touch panel according to another preferred embodiment of the present invention. FIG. 5 is a schematic view of another preferred embodiment of the present invention. The structure of the touch panel is not intended to be a second embodiment of the present invention. The seventh embodiment is a touch panel of another preferred embodiment of the present invention. FIG. 3 is a schematic structural view of a touch panel according to another preferred embodiment of the present invention. [Main component symbol description] Conventional technology: 10' Scanning busbar 099102747 Form number A0101 Page 13/Total 21 page 0992005290-0 201128470 11, Scanning line 20, Detection busbar 21, Detection line 30, Control unit Invention: 10 Scanning busbar 12 Scanning line 20 Detection busbar 22 Detection line 30 Control unit 40 Scanning compensation impedance component 42 Detecting compensation impedance component 44 First compensation impedance component 46 Second compensation impedance component 50 Touching surface 52 Touch position 60 Compensating impedance component 099102747 Form number A0101 Page 14 of 21 0992005290-0

Claims (1)

201128470 VII. Patent application scope: 1. A touch panel with impedance compensation function, comprising: a scanning bus bar coupled with a plurality of scanning lines for scanning a touch screen; a detecting bus bar coupled to a plurality of signals Detecting lines, the detection lines respectively interlacing the scan lines, the detection lines detecting at least one touch position of the touch screen > a control unit coupled to the scan bus and the detection confluence a row to control the scan bus and the detection bus; a plurality of scan compensation impedance components respectively coupled between the scan lines and the scan bus; and a plurality of detection compensation impedance components, respectively coupled The detection lines are between the detection bus and the detection bus. 2. The touch panel of claim 1, wherein the scan compensation impedance elements have impedance values greater than 1 000 ohms (lkQ). 3. The touch panel of claim 1, wherein the resistance values of the detection compensation impedance elements are greater than 1000 ohms (lkD). The touch panel of claim 1, wherein the impedance values of the scan compensation impedance elements of the scan bus are made up to or from the scan start position of the touch screen. Small to large decrement/incremental combination. 5. The touch panel of claim 4, wherein the scan compensation impedance elements between the scan bus bars and the scan lines are each added with greater than 1 000 ohms (lkQ). Scan the compensation impedance. 6. The touch panel of claim 1, wherein the impedance values of the detection compensation impedance elements of the detection bus are pressed according to the touch surface 099102747 Form No. A0101 page 15 / A total of 21 pages 0992005290-0 201128470 The starting position of the measurement is made to be large enough to be careful to the decrement/increment of the A combination of 0, such as the patent application of the 6th touch panel, the towel in the detection bus and The analog compensation impedance elements between the price lines are each added with a scan compensation impedance greater than 1 000 ohms (lkQ). The touch panel of claim i, wherein the scan compensation impedance elements and the sense compensation impedance elements are respectively located in the scan bus and the detection bus. The invention relates to the touch panel of claim 2, wherein the scanning compensation impedance component and the (four) gamma-resistance component are: a resistive material, a field effect transistor (faction effect) (Field Effect Transist〇r, fet ), a pair of carrier junction transistors (Bip〇lar JunetiQn ansistor 'BJT) or - resistors; the scan lines and the detection lines. The conductive film is a transparent conductive oxide (Transparent C 〇 duct , , 薄 薄 薄 薄 薄 薄 薄 阻抗 阻抗 阻抗 阻抗 阻抗 阻抗 阻抗 阻抗 阻抗 阻抗 阻抗 阻抗 阻抗 阻抗 阻抗 扫描 扫描 扫描 扫描 扫描 扫描 扫描 扫描 扫描 扫描 扫描 扫描 扫描 扫描 扫描 扫描 扫描 扫描 扫描 扫描 扫描 扫描The plurality of scan lines are used to scan a touch surface; the detection bus is a secret multi-layer line, and the (four) lines respectively interlace the scan lines, and the scans (10) (four) at least the touch surface The position control unit utilises the scan bus and the debt detection flow row to control the 5 sea scan bus bar and the detection bus bar; and the hard number compensation group anti-components separate the scan lines from the scan Between the bus bars, or between the service and the _ turtle row. For example, in the touch panel described in the scope of claim U, the form number face is 16 (4) 21 pages ~ 099200 11 . t 201128470 The resistance values of the anti-components are all greater than 1 〇〇〇 ohm UkQ). 12 13 触控 The touch panel of claim 1 , wherein the compensation impedance 7L is located in the scanning bus or the detection bus. The touch panel of claim 11, wherein the compensating impedance element is a resistive material, a FeiDe Effect Transistor (FET), and a double carrier junction transistor. (Bipolar Junction Transistor, BJT) or a resistor; the scan lines and the detection lines are a conductive film or an electrically conductive material, and the conductive film is a transparent conductive oxide (TC0) film. Ο 099102747 Form nickname A0101 Page 17 of 21 0992005290-0