TWI724790B - Resistive touch device and resistive touch-sensing method - Google Patents

Abstract

A resistive touch-sensing method includes detecting a plurality of first electrodes according to a high-voltage threshold to determine whether there is a first start signal, detecting a plurality of second electrodes according to a low-voltage threshold to determine whether there is a second start signal, detecting valid touch point(s) on a resistive signal sensor when the first start signal(s) and the second start signal(s) are present, calculating the coordinates of the valid touch point(s), retrieving second output difference between output of the first electrode corresponding to each valid touch point and providing with the high voltage and output of the corresponding second electrode providing with the low voltage, and reporting the coordinates of each valid touch point according to the corresponding first output difference and the corresponding second output difference.

Description

Resistive touch device and resistive touch sensing method

The present invention relates to a resistive touch technology, in particular to a resistive touch device and a resistive touch sensing method.

Commonly used touch technologies on touch devices can be divided into two categories: resistive touch technologies and capacitive touch technologies according to their sensing methods. Although the current mainstream is projected capacitive touch technology, its cost is high, it is not suitable for thick gloves, and its ability to resist noise is poor. However, there are many noise sources in the application of touch devices, such as power noise, radio frequency signal noise, liquid crystal display (LCD) noise, mechanism deformation noise, water or liquid noise, etc. . Relatively speaking, the performance of Analog Matrix Resistive (AMR) touch technology in the face of the aforementioned noise is better than that of projected capacitive touch technology. In certain industrial or military defense applications, anti-interference ability and coordinate reporting accuracy are the first considerations, so the analog matrix resistive touch technology is the first choice.

The resistive touch device is composed of upper and lower two ITO (Indium Tin Oxide, indium tin oxide) conductive films laminated together. The two ITO conductive films are planar resistors and do not touch each other in a natural state. When the user applies force to touch the resistive touch device, the positions of the two ITO conductive films corresponding to the touch points will touch each other, and thus the coordinates of the touch points are obtained. Currently, most resistive touch devices have a single-touch detection architecture, and it is difficult to implement multi-touch operations.

In one embodiment, a resistive touch sensing method is applicable to a resistive signal sensor. The resistive signal sensor includes a plurality of first electrodes and a plurality of second electrodes. The resistive touch sensing method includes: detecting a plurality of first electrodes according to a high voltage threshold to determine whether there is a first activation signal, detecting a plurality of second electrodes according to a low voltage threshold to determine whether there is a second activation signal, and When any first activation signal and any second activation signal exist, detect at least one effective touch point on the resistive signal sensor, calculate the coordinates of at least one effective touch point, and obtain each effective touch point again A second output difference between the corresponding first electrode under high-voltage power supply and the corresponding second electrode under low-voltage power supply, and the first output difference and the second output difference corresponding to each effective contact pressure point are adopted The coordinates of the effective touch point. Wherein, a first output difference between a first electrode corresponding to each effective contact pressure point under a high voltage power supply and a corresponding second electrode under a low voltage power supply is greater than a difference threshold.

In one embodiment, a resistive touch device includes: a resistive signal sensor and a control circuit. The resistive signal sensor includes a plurality of first electrodes and a plurality of second electrodes. The first electrodes are arranged parallel to each other. The second electrodes are arranged in parallel with each other and overlap the plurality of first electrodes at intervals. The control circuit is coupled to a plurality of first electrodes and a plurality of second electrodes, and executes: detecting a plurality of first electrodes according to a high voltage threshold to determine whether there is a first activation signal, and detecting a plurality of second electrodes according to a low voltage threshold to determine Whether there is a second activation signal, when any first activation signal and any second activation signal exist, detect at least one effective touch point on the resistive signal sensor, and calculate the coordinates of at least one effective touch point , Obtain again a second output difference between the first electrode corresponding to each effective contact pressure point under high voltage power supply and the corresponding second electrode under low voltage power supply, and the first output difference corresponding to each effective contact pressure point The difference between the value and the second output adopts the coordinates of the effective touch point. Wherein, a first output difference between a first electrode corresponding to each effective contact pressure point under a high voltage power supply and a corresponding second electrode under a low voltage power supply is greater than a difference threshold.

In summary, according to the resistive touch device and resistive touch sensing method of the present invention, it can speed up the determination of touch pressure points, and can avoid the misjudgment of light clicks, quick clicks or ghost points.

First, the resistive touch sensing method according to any embodiment of the present invention can be adapted to resistive touch devices, such as but not limited to smart phones, navigation devices (PND), and e-books. ), the user interface of electronic devices such as notebooks, tablets or pads or smart home appliances. In some embodiments, the resistive touch device can be integrated with the display to form a touch screen. In addition, the touch of the resistive touch device may be a touch element such as a hand, a stylus pen, or a touch brush.

1, a resistive touch device 10 includes a control circuit 12 and a resistive signal sensor 14. The resistive signal sensor 14 is connected to the control circuit 12. The resistive signal sensor 14 includes two sensing layers in a stacked configuration, and each sensing layer has a plurality of electrodes. Taking an eight-wire resistive signal sensor as an example, the resistive signal sensor 14 includes a plurality of first electrodes X1~X8 (that is, a sensing layer) and a plurality of second electrodes Y1~Y8 (that is, another sensing layer). ). Each of the second electrodes Y1 to Y8 extends along a first direction (ie, the X-axis direction), and the second electrodes Y1 to Y8 are arranged in parallel along a second direction (ie, the Y-axis direction). The first electrodes X1 to X8 extend along the second direction, and the first electrodes X1 to X8 are arranged in parallel along the first direction. Wherein, the first direction is substantially perpendicular to the second direction. Here, the first electrodes X1 to X8 overlap the second electrodes Y1 to Y8 at intervals. For example, the second electrodes Y1 to Y8 are located above the first electrodes X1 to X8 at intervals.

In some embodiments, the control circuit 12 includes a driving and measuring circuit 121 and a processing unit 123. The driving and measuring circuit 121 is coupled to the first electrodes X1 to X8 and the second electrodes Y1 to Y8. The processing unit 123 is used for controlling the driving and measuring circuit 121 to drive and measure the electrodes, and obtain the coordinates of at least one effective touch point according to the measurement result.

Here, the control circuit 12 executes the following point finding procedure to obtain the coordinates of at least one effective touch point. In the point finding procedure, referring to FIGS. 1 and 2, the control circuit 12 first checks at least one activation signal on the resistive signal sensor 14 (step S11). In step S11, the control circuit 12 detects a plurality of first electrodes according to a high voltage threshold to determine whether there is a first activation signal, and detects a plurality of second electrodes according to a low voltage threshold to determine whether there is a second activation signal. The high voltage threshold can be determined according to the resistance of the resistive signal sensor 14 (such as the resistance of the first electrode and/or the resistance of the wiring, etc.) and the expected sensitivity of the resistive signal sensor 14. Similarly, the low voltage threshold can be determined according to the resistance of the resistive signal sensor 14 (such as the resistance of the second electrode and/or the resistance of the wiring, etc.) and the expected sensitivity of the resistive signal sensor 14 .

In an example of step S11, referring to FIGS. 1 and 3, the driving and measuring circuit 121 provides a high voltage (for example, 5V or 3.3V) to the first terminals (ie, the digital terminals) of all the first electrodes X1~X8. ), and provide a low voltage (for example, 0V) to the first end (ie, the digital end) of all the second electrodes Y1 to Y8 (step S111). In the case where the first electrodes X1~X8 supply high voltage and the second electrodes Y1~Y8 supply low voltage (step S111), the driving and measuring circuit 121 starts from each first electrode (Xi, i are integers from 1 to 8) The second terminal (ie, the analog terminal) measures the output signal of the first electrode Xi under high-voltage power supply (hereinafter referred to as the first output signal) (step S112). At this time, the processing unit 123 receives the first output signal measured by the driving and measuring circuit 121, and compares the first output signal of each first electrode Xi with the high voltage threshold (step S113). Wherein, when the first output signal is less than the high voltage threshold, the control circuit 12 determines that the corresponding first electrode Xi has the first activation signal (step S116). Conversely, when the first output signal is not less than the high voltage threshold, the processing unit 123 determines that the corresponding first electrode Xi does not have the first activation signal (step S117). In addition, when the first electrodes X1 to X8 are supplied with high voltage and the second electrodes Y1 to Y8 are supplied with low voltage (step S111), the driving and measuring circuit 121 also supplies power from each second electrode (Yj, j is 1 to 8). The second terminal (ie, the digital terminal) measures the output signal of the second electrode Yj under low-voltage power supply (hereinafter referred to as the second output signal) (step S114). At this time, the processing unit 123 receives the second output signal measured by the driving and measuring circuit 121, and compares the second output signal of each second electrode Yj with the low voltage threshold (step S115). Wherein, when the second output signal is greater than the low voltage threshold, the control circuit 12 determines that the corresponding second electrode Yj has a second activation signal (step S118). Conversely, when the second output signal is not greater than the low voltage threshold, the control circuit 12 determines that the corresponding second electrode Yj does not have a second activation signal (step S119). Among them, the high voltage threshold is less than or equal to the digital value of the high voltage, and the low voltage threshold is greater than or equal to the digital value of the low voltage. In addition, the high voltage threshold may be greater than the low voltage threshold. In this way, the analog-to-digital converter 1215 of the driving and measuring circuit 121 only needs to read the number of readings of the sum of the number of the first electrodes X1~X8 and the number of the second electrodes Y1~Y8 to enable the control circuit 12 Find all the intersections that are pressed, and thus relatively increase the speed of finding points.

For example, the resistive signal sensor 14 has eight first electrodes X1 to X8 and eight second electrodes Y1 to Y8 as an example. Here, the multiplexer 1211 of the driving and measuring circuit 121 couples the first ends of all the first electrodes X1~X8 to a high voltage, and the multiplexer 1212 of the driving and measuring circuit 121 couples all the second electrodes Y1~ The first end of Y8 is coupled to ground. Then, the multiplexers 1213 and 1214 of the driving and measuring circuit 121 sequentially couple the first electrodes X1 to X8 and the second electrodes Y1 to Y8 to the analog-to-digital converter (ADC) 1215, so that the analog-to-digital converter 1215 Read the output signal from the coupled electrode. In other words, when the first ends of all the first electrodes X1~X8 are coupled to high voltage and the first ends of all the second electrodes Y1~Y8 are coupled to the ground, the analog-to-digital converter 1215 is sequentially coupled via the multiplexer 1213 Connect the first electrodes X1~X8 to read the first output signals of the first electrodes X1~X8 and provide them to the processing unit 123; at this time, the multiplexer 1214 disconnects the analog-to-digital converter 1215 from the second electrodes Y1~Y8 . Then, when the first ends of all the first electrodes X1~X8 are coupled to high voltage and the first ends of all the second electrodes Y1~Y8 are coupled to the ground, the analog-to-digital converter 1215 then passes through the multiplexer 1214 in sequence The second electrodes Y1~Y8 are coupled to read the second output signals of the second electrodes Y1~Y8 and provide them to the processing unit 123; at this time, the multiplexer 1213 disconnects the analog-to-digital converter 1215 from each first electrode X1~ X8. Then, the processing unit 123 compares the first output signals of the first electrodes X1 to X8 with high voltage thresholds, respectively. Take the two contact pressure points Ta and Tb shown in FIG. 4 simultaneously occurring on the resistive signal sensor 14 as an example. Wherein, the pressure contact point Ta occurs at the overlap of the first electrode X6 and the second electrode Y3, and the pressure contact point Tb occurs at the overlap of the first electrode X2 and the second electrode Y7. At this time, the processing unit 123 detects that the first output signal of the first electrodes X2 and X6 is less than the high voltage threshold, and therefore determines that the first electrodes X2 and X6 have the first activation signal (that is, the first output signal less than the high voltage threshold) ). In other words, the processing unit 123 will detect that the first output signals of the first electrodes X1, X3~X5, X7, and X8 are not less than the high voltage threshold, and therefore determine that the first electrodes X1, X3~X5, X7, and X8 have no first output signals. Activate the signal. In addition, the processing unit 123 also detects that the second output signal of the second electrode Y3, Y7 is greater than the low voltage threshold, and therefore determines that the second electrode Y3, Y7 has a second activation signal (that is, the second output signal greater than the low voltage threshold) Signal). In other words, the processing unit 123 will detect that the first output signal of the second electrode Y1~Y2, Y4~Y6, Y8 is not greater than the low voltage threshold, and therefore determines that the second electrode Y1~Y2, Y4~Y6, Y8 does not have a second output signal. Activate the signal. In this way, the analog-to-digital converter 1215 only needs to read 16 times to enable the control circuit 12 to find the two contact pressure points Ta and Tb.

When any first activation signal and any second activation signal are present (step S11), the control circuit 12 then performs a Z scan to detect at least one effective touch pressure point on the resistive signal sensor 14 (step S12) . Conversely, when any start signal exists (step S11), the control circuit 12 does not perform the Z scan.

In an example of step S12, referring to FIGS. 1 and 5, the driving and measuring circuit 121 sequentially supplies high voltages (eg, 5V or 3.3V) to the first ends of the first electrodes X1~X8 (step S121) , And sequentially provide low voltages (eg, 0V) to the first ends of the second electrodes Y1 to Y8 (step S122). Here, when a high voltage is applied to the first end of any first electrode Xi, the remaining first electrodes are in a floating state. Similarly, when a low voltage is applied to the first end of any second electrode Yj, the remaining second electrodes are in a floating state. In addition, the driving and measuring circuit 121 measures the first output signal of the first electrode Xi under high-voltage power supply from the second end of each first electrode Xi (step S123), and from the second end of each second electrode Yj Measure the second output signal of the second electrode Yj under low-voltage power supply (step S124). Next, the processing unit 123 calculates the output difference between the first output signal of each first electrode Xi and the second output signal of each second electrode Yj (hereinafter referred to as the first output difference) (step S125), and compares each The first output difference and the difference threshold (hereinafter referred to as the first difference threshold) (step S126). Wherein, when the first output difference is greater than the first difference threshold, the processing unit 123 determines that there is no effective contact pressure point on the first electrode Xi and the second electrode Yj corresponding to the first output difference (step S127). Conversely, when the first output difference is not greater than the first difference threshold, the processing unit 123 determines that the first electrode Xi and the second electrode Yj corresponding to the first output difference have effective contact pressure points (step S128).

For example, the resistive signal sensor 14 has eight first electrodes X1 to X8 and eight second electrodes Y1 to Y8 as an example. In the first detection period, the driving and measuring circuit 121 first provides a high voltage to the first end of the first first electrode X1 (step S121), and provides a low voltage to the first end of the first second electrode Y1 (Step S122). At this time, the first electrodes X2 to X8 and the second electrodes Y2 to Y8 are all in a floating state. When the first electrode X1 is coupled to a high voltage and the second electrode Y1 is coupled to a low voltage, the driving and measuring circuit 121 measures the first output of the first electrode X1 under the high voltage supply from the second end of the first electrode X1 Signal (Sx11) (step S123), and measure the second output signal (Sy11) of the second electrode Y1 under low-voltage power supply from the second end of the second electrode Y1 (step S124). Then, the processing unit 123 receives the first output signal (Sx11) and the second output signal (Sy11), and calculates the difference between the first output signal (Sx11) and the second output signal (Sy11), that is, the first output difference Value (D11) (step S125). The processing unit 123 compares the first output difference (D11) with the first difference threshold (step S126) to confirm whether the first output difference (D11) is greater than the first difference threshold. When the first output difference (D11) is greater than the first difference threshold, the processing unit 123 determines that there is no effective contact pressure point on the first electrode X1 and the second electrode Y1 (step S127). Conversely, when the first output difference (D11) is not greater than the first difference threshold, the processing unit 123 determines that there are valid contact pressure points on the first electrode X1 and the second electrode Y1 (step S128). At the same time or after the processing unit 123 makes the judgment (steps S125 to S128), the control circuit 12 enters the second detection period. In other words, each detection period includes a measurement interval (that is, the period during which the driving and measurement circuit 121 performs measurement (steps S121 to S124)) and an operation interval (that is, in the processing unit) connected in time after the measurement interval. 123 makes a judgment (period of steps S125 to S128)). Here, the measurement interval of each detection period can be located after the calculation period of the previous detection period, or overlap with the calculation period of the previous detection period. In the second detection period, the driving and measuring circuit 121 switches to provide a low voltage to the first end of the second second electrode Y2 (step S122). At this time, the driving and measuring circuit 121 maintains a high voltage to the first end of the first first electrode X1, and the first electrodes X2 to X8 and the second electrodes Y1, Y3 to Y8 are all in a floating state. Then, when the first electrode X1 is coupled to the high voltage and the second electrode Y2 is coupled to the low voltage, the driving and measuring circuit 121 measures the first electrode X1 from the second end of the first electrode X1 under the high voltage supply. An output signal (Sx12) (step S123), and the second output signal (Sy12) of the second electrode Y2 under low-voltage power supply is measured from the second end of the second electrode Y2 (step S124). Then, the processing unit 123 receives the first output signal (Sx12) and the second output signal (Sy12), and calculates the difference between the first output signal (Sx12) and the second output signal (Sy12), that is, the first output difference Value (D12) (step S125). The processing unit 123 compares the first output difference (D12) with the first difference threshold (step S126) to confirm whether the first output difference (D12) is greater than the first difference threshold. When the first output difference (D12) is greater than the first difference threshold, the processing unit 123 determines that there is no effective contact pressure point on the first electrode X1 and the second electrode Y2 (step S127). Conversely, when the first output difference (D12) is not greater than the first difference threshold, the processing unit 123 determines that there are valid contact pressure points on the first electrode X1 and the second electrode Y2 (step S128). In the third detection period, the driving and measuring circuit 121 is switched to provide a low voltage to the first end of the third second electrode Y3 (step S122). At this time, the driving and measuring circuit 121 maintains a high voltage to the first end of the first first electrode X1, and the first electrodes X2 to X8 and the second electrodes Y1 to Y2, Y4 to Y8 are all in a floating state. Then, when the first electrode X1 is coupled to a high voltage and the second electrode Y3 is coupled to a low voltage, the driving and measuring circuit 121 measures the first electrode X1 from the second end of the first electrode X1 under the high voltage supply. An output signal (Sx13) (step S123), and the second output signal (Sy13) of the second electrode Y2 under low-voltage power supply is measured from the second end of the second electrode Y2 (step S124). Then, the processing unit 123 receives the first output signal (Sx13) and the second output signal (Sy13), and calculates the difference between the first output signal (Sx13) and the second output signal (Sy13), that is, the first output difference Value (D13) (step S125). The processing unit 123 compares the first output difference (D13) with the first difference threshold (step S126) to confirm whether the first output difference (D13) is greater than the first difference threshold. When the first output difference (D13) is greater than the first difference threshold, the processing unit 123 determines that there is no effective contact pressure point on the first electrode X1 and the second electrode Y3 (step S127). Conversely, when the first output difference (D13) is not greater than the first difference threshold, the processing unit 123 determines that there are valid contact pressure points on the first electrode X1 and the second electrode Y3 (step S128). By analogy, the driving and measuring circuit 121 will switch to provide low voltages to the second electrodes Y4~Y8 one by one and perform corresponding measurements (steps S121~S124), so that the processing unit 123 determines that the first electrode X1 is the same as the first electrode X1. Whether there is a valid contact pressure point at the overlap of the two electrodes Y4~Y8 (steps S125~S128). After the detection of the overlap between the first electrode X1 and the second electrode Y1~Y8 is completed, in the ninth detection period, the driving and measuring circuit 121 is switched to provide a high voltage to the second electrode X2. The first end (step S121), and again switch to provide a low voltage to the first end of the first second electrode Y1 (step S122). At this time, the first electrodes X1, X3 to X8 and the second electrodes Y2 to Y8 are all in a floating state. When the first electrode X2 is coupled to a high voltage and the second electrode Y1 is coupled to a low voltage, the driving and measuring circuit 121 measures the first output of the first electrode X2 from the second end of the first electrode X2 under high voltage supply Signal (Sx21) (step S123), and measure the second output signal (Sy21) of the second electrode Y1 under low-voltage power supply from the second end of the second electrode Y1 (step S124). Then, the processing unit 123 receives the first output signal (Sx21) and the second output signal (Sy21), and calculates the difference between the first output signal (Sx21) and the second output signal (Sy21), that is, the first output difference Value (D21) (step S125). The processing unit 123 compares the first output difference (D21) with the first difference threshold (step S126) to confirm whether the first output difference (D21) is greater than the first difference threshold. When the first output difference (D21) is greater than the first difference threshold, the processing unit 123 determines that there is no effective contact pressure point on the first electrode X2 and the second electrode Y1 (step S127). Conversely, when the first output difference (D21) is not greater than the first difference threshold, the processing unit 123 determines that there are valid contact pressure points on the first electrode X2 and the second electrode Y1 (step S128). In the tenth detection period, the driving and measuring circuit 121 switches to provide a low voltage to the first end of the second second electrode Y3 (step S122). At this time, the driving and measuring circuit 121 maintains a high voltage to the first end of the second first electrode X2, and the first electrodes X1, X3~X8 and the second electrodes Y1, Y3~Y8 are all in a floating state. Then, when the first electrode X2 is coupled to the high voltage and the second electrode Y2 is coupled to the low voltage, the driving and measuring circuit 121 measures the first electrode X2 from the second end of the first electrode X2 under the high voltage supply. An output signal (Sx22) (step S123), and the second output signal (Sy22) of the second electrode Y2 under low-voltage power supply is measured from the second end of the second electrode Y2 (step S124). Then, the processing unit 123 receives the first output signal (Sx22) and the second output signal (Sy22), and calculates the difference between the first output signal (Sx22) and the second output signal (Sy22), that is, the first output difference Value (D22) (step S125). The processing unit 123 compares the first output difference (D22) with the first difference threshold (step S126) to confirm whether the first output difference (D22) is greater than the first difference threshold. When the first output difference (D22) is greater than the first difference threshold, the processing unit 123 determines that there is no effective contact pressure point on the first electrode X2 and the second electrode Y2 (step S127). Conversely, when the first output difference (D22) is not greater than the first difference threshold, the processing unit 123 determines that there are valid contact pressure points on the first electrode X2 and the second electrode Y2 (step S128). By analogy, the driving and measuring circuit 121 will switch one by one to provide low voltages to the second electrodes Y3~Y8 and perform corresponding measurements (steps S121~S124), so that the processing unit 123 determines that the first electrode X2 is the same as the first electrode X2. Whether there is a valid contact pressure point at the overlap of the two electrodes Y3~Y8 (steps S125~S128). Then, the driving and measuring circuit 121 switches to provide a high voltage to the first end of the third first electrode X3 (step S121), and switches to provide a low voltage to the second electrodes Y1 to Y8 one by one and perform corresponding measurements. Measure (steps S122 to S124), so that the processing unit 123 determines whether there is a valid contact pressure point at the overlap of the first electrode X3 and the second electrode Y1 to Y8, respectively (steps S125 to S128). The process can be deduced by analogy until the processing unit 123 completes the judgment of whether there is a valid contact pressure point at the overlap between the last first electrode X8 and the second electrode Y1 to Y8 respectively.

Further, take the two contact pressure points Ta and Tb shown in FIG. 4 simultaneously occurring on the resistive signal sensor 14 as an example. Since the first electrode X1 and the second electrode Y1~Y8 overlap, the first electrode X2 and the second electrode Y1~Y2, Y4~Y6, Y8 overlap, the first electrode X3 and the second electrode Y1 On the overlap of ~Y8, the overlap of the first electrode X4 and the second electrode Y1~Y8, the overlap of the first electrode X5 and the second electrode Y1~Y8, the first electrode X6 and the second electrode On the overlap of Y1~Y2, Y4~Y6, and Y8, on the overlap of the first electrode X7 and the second electrode Y1~Y8, and on the overlap of the first electrode X8 and the second electrode Y1~Y8. There are contact pressure points, so the processing unit 123 compares and obtains that the corresponding first output difference is greater than the first difference threshold, and then determines that there is no effective contact pressure point at these positions. Furthermore, since the overlap of the first electrode X2 and the second electrode Y3 and the overlap of the first electrode X6 and the second electrode Y7 are ghost points, the processing unit 123 also obtains its individual correspondence after comparison. The first output difference of is greater than the first difference threshold, and then it is determined that there is no effective contact pressure point at these positions. Conversely, since there are contact pressure points Ta and Tb on the overlap of the first electrode X2 and the second electrode Y7 and the overlap of the first electrode X6 and the second electrode Y3, the processing unit 123 will obtain them after comparison. The individual corresponding first output difference is not greater than the first difference threshold, and then it is determined that there are effective contact pressure points Ta and Tb at these positions.

In another example of step S12, the control circuit 12 can detect the effective touch point only for the activation signal. Here, referring to FIGS. 1 and 6, the driving and measuring circuit 121 provides a high voltage (for example, 5V or 3.3V) to the first terminals of the first electrodes X2 and X6 corresponding to each first activation signal (step S121') , And provide a low voltage (for example, 0V) to the first end of the second electrode Y3, Y7 corresponding to each second activation signal (step S122'). Here, when a high voltage is supplied to the first end of any first electrode X2 (or X6), the remaining first electrodes X1, X3~X8 (or X1~X5, X7~X8) are in a floating state. Similarly, when a low voltage is provided to the first end of any second electrode Y3 (or Y7), the remaining second electrodes Y1~Y2, Y4~Y8 (or Y1~Y6, Y8) are in a floating state. In addition, the driving and measuring circuit 121 measures the first output signal of the first electrode X2 (or X6) under high-voltage power supply from the second end of the first electrode X2 (or X6) corresponding to each first activation signal (step S123'), and measure the second output signal of the second electrode Y3 (or Y7) under low-voltage power supply from the second end of the second electrode Y3 (or Y7) corresponding to each first activation signal (Step S124') . Next, the processing unit 123 calculates the output difference between each first output signal and each second output signal (hereinafter referred to as the first output difference) (step S125'). In other words, the processing unit 123 calculates the first output difference between the first output signal of the first electrode X2 and the second output signal of the second electrode Y3, the first output signal of the first electrode X2 and the first output signal of the second electrode Y7. The first output difference between the two output signals, the first output difference between the first output signal of the first electrode X6 and the second output signal of the second electrode Y3, and the first output signal of the first electrode X6 The first output difference between the second output signal and the second output signal of the second electrode Y7. In addition, the processing unit 123 compares each first output difference with a first difference threshold (step S126'). Wherein, when the first output difference is greater than the first difference threshold, the processing unit 123 determines that there is no effective contact pressure point on the first electrode and the second electrode corresponding to the first output difference (step S127'). Conversely, when the first output difference is not greater than the first difference threshold, the processing unit 123 determines that the first electrode and the second electrode corresponding to the first output difference have effective contact pressure points (step S128'). The first difference threshold can be determined according to the resistance of the resistive signal sensor 14 (such as the resistance of the electrodes and/or the resistance of the wiring, etc.) and the expected sensitivity of the resistive signal sensor 14.

For example, the resistive signal sensor 14 has eight first electrodes X1 to X8 and eight second electrodes Y1 to Y8 and two contact points Ta and Tb on it as an example. In the first detection period, the driving and measuring circuit 121 first provides a high voltage to the first end of the first electrode X2 corresponding to the first first activation signal (step S121'), and provides a low voltage to the first The first end of the second electrode Y3 corresponding to the second activation signal (step S122'). At this time, the first electrodes X1, X3~X8 and the second electrodes Y1~Y2, Y4~Y8 are all in a floating state. When the first electrode X2 is coupled to a high voltage and the second electrode Y3 is coupled to a low voltage, the driving and measuring circuit 121 measures the first output of the first electrode X2 under the high voltage supply from the second end of the first electrode X2 Signal (Sx23) (step S123'), and measure the second output signal (Sy23) of the second electrode Y3 under low-voltage power supply from the second end of the second electrode Y3 (step S124'). Here, the iso-calibration circuit structure of the resistive touch device is shown in FIG. 7. Among them, R1 is the lower layer impedance, that is, the impedance of the section of the first electrode X2 between the overlap of the first electrode X2 and the second electrode Y3 to the high voltage source (that is, it provides a high voltage) and the impedance of the trace . R2 is the upper layer impedance, that is, the impedance of the section of the second electrode Y3 between the overlap of the first electrode X2 and the second electrode Y3 to the low voltage source (that is, it provides a low voltage, such as grounding) and the wiring impedance. Rz is the Z-axis impedance, that is, the impedance of the dot spacer (dot) where the first electrode X2 and the second electrode Y3 overlap. Then, the processing unit 123 receives the first output signal (Sx23) and the second output signal (Sy23), and calculates the difference between the first output signal (Sx23) and the second output signal (Sy23), that is, the first output difference Value (D23) (step S125'). The processing unit 123 compares the first output difference (D23) with the first difference threshold (step S126') to confirm whether the first output difference (D23) is greater than the first difference threshold. Here, since there are ghost points on the first electrode X2 and the second electrode Y3, the processing unit 123 will obtain that the first output difference (D23) is greater than the first difference threshold, and then determine the first electrode X2 There is no effective contact pressure point on the second electrode Y3 (step S127'). At the same time or after the processing unit 123 makes the judgment (steps S125' to S128'), the control circuit 12 enters the second detection period. In other words, each detection period includes a measurement interval (that is, the period during which the driving and measurement circuit 121 performs measurement (steps S121'~S124')) and an operation interval connected in time after the measurement interval (that is, in The processing unit 123 makes a judgment (period of steps S125' to S128'). Here, the measurement interval of each detection period can be located after the calculation period of the previous detection period, or overlap with the calculation period of the previous detection period. In the second detection period, the driving and measuring circuit 121 switches to provide a low voltage to the first end of the second electrode Y7 corresponding to the second second activation signal (step S122'). At this time, the driving and measuring circuit 121 maintains a high voltage to the first end of the first electrode X2 corresponding to the first first activation signal, and the first electrodes X1, X3~X8 and the second electrodes Y1~Y6, Y8 All are in a floating state. Then, when the first electrode X2 is coupled to the high voltage and the second electrode Y7 is coupled to the low voltage, the driving and measuring circuit 121 measures the first electrode X2 from the second end of the first electrode X2 under the high voltage supply. An output signal (Sx27) (step S123'), and the second output signal (Sy27) of the second electrode Y7 under low voltage power supply is measured from the second end of the second electrode Y7 (step S124'). Then, the processing unit 123 receives the first output signal (Sx27) and the second output signal (Sy27), and calculates the difference between the first output signal (Sx27) and the second output signal (Sy27), that is, the first output difference Value (D27) (step S125'). The processing unit 123 compares the first output difference (D27) with the first difference threshold (step S126') to confirm whether the first output difference (D27) is greater than the first difference threshold. Here, since the contact pressure point Tb occurs on the first electrode X2 and the second electrode Y3, the processing unit 123 determines that the first electrode X2 is determined when the first output difference (D27) is not greater than the first difference threshold. There is an effective contact pressure point Tb on the second electrode Y7 (step S128'). When there is no next second activation signal, the driving and measuring circuit 121 switches to provide a high voltage to the first electrode X6 corresponding to the next first activation signal. That is, in the third detection period, the driving and measuring circuit 121 switches to provide a high voltage to the first end of the first electrode X6 corresponding to the second second activation signal (step S121'), and again switches to provide a low voltage The voltage reaches the first end of the second electrode Y3 corresponding to the first second activation signal (step S122'). At this time, the first electrodes X1 to X5, X7 to X8 and the second electrodes Y1 to Y2, Y4 to Y8 are all in a floating state. When the first electrode X6 is coupled to a high voltage and the second electrode Y3 is coupled to a low voltage, the driving and measuring circuit 121 measures the first output of the first electrode X6 from the second end of the first electrode X6 under high voltage power supply Signal (Sx63) (step S123'), and measure the second output signal (Sy63) of the second electrode Y3 under low-voltage power supply from the second end of the second electrode Y3 (step S124'). Then, the processing unit 123 receives the first output signal (Sx63) and the second output signal (Sy63), and calculates the difference between the first output signal (Sx63) and the second output signal (Sy63), that is, the first output difference Value (D63) (step S125'). The processing unit 123 compares the first output difference (D63) with the first difference threshold (step S126') to confirm whether the first output difference (D63) is greater than the first difference threshold. Here, since a contact pressure point Ta occurs on the first electrode X6 and the second electrode Y3, the processing unit 123 obtains that the first output difference (D63) is not greater than the first difference threshold, and then determines that the first electrode X6 and the There is an effective contact pressure point Ta on the second electrode Y3 (step S128'). In the fourth detection period, the driving and measuring circuit 121 switches to provide a low voltage to the first end of the second electrode Y7 corresponding to the second second activation signal (step S122'). At this time, the driving and measuring circuit 121 maintains a high voltage to the first end of the first electrode X6 corresponding to the first first activation signal, and the first electrodes X1~X5, X7~X8 and the second electrodes Y1~Y6 , Y8 are all in floating state. Then, when the first electrode X6 is coupled to the high voltage and the second electrode Y7 is coupled to the low voltage, the driving and measuring circuit 121 measures the first electrode X6 from the second end of the first electrode X6 under the high voltage supply. An output signal (Sx67) (step S123'), and the second output signal (Sy67) of the second electrode Y7 under low voltage power supply is measured from the second end of the second electrode Y7 (step S124'). Then, the processing unit 123 receives the first output signal (Sx67) and the second output signal (Sy67), and calculates the difference between the first output signal (Sx67) and the second output signal (Sy67), that is, the first output difference Value (D67) (step S125'). The processing unit 123 compares the first output difference (D67) with the first difference threshold (step S126') to confirm whether the first output difference (D67) is greater than the first difference threshold. Here, since the first electrode X6 and the second electrode Y7 are ghost points, the processing unit 123 will obtain that the first output difference (D67) is greater than the first difference threshold, and then determine the first electrode X6 and the second electrode There is no valid touch pressure point on Y7 (step S127').

In detail, in the first detection period, the multiplexer 1211 of the driving and measuring circuit 121 couples the first end of the first electrode X2 to a high voltage, and disconnects the first electrodes X1, X3~X8 from the high voltage . At the same time, the multiplexer 1212 of the driving and measuring circuit 121 couples the first end of the second electrode Y3 to a low voltage, and disconnects the second electrodes Y1~Y2, Y4~Y8 from the low voltage. When the first electrode X2 is coupled to a high voltage and the second electrode Y3 is coupled to a low voltage, the multiplexer 1213 of the driving and measuring circuit 121 first couples the second end of the first electrode X2 to the analog-to-digital converter 1215, So that the analog-to-digital converter 1215 reads the first output signal (Sx23) from the coupled first electrode X2 and provides it to the processing unit 123, as shown in FIG. 8. Here, the multiplexer 1213 disconnects the first electrodes X1, X3~X8 and the analog-to-digital converter 1215, and the multiplexer 1214 also disconnects the second electrodes Y1~Y8 and the analog-to-digital converter 1215. Then, the multiplexer 1213 of the driving and measuring circuit 121 is switched to disconnect the first electrodes X1~X8 and the analog-to-digital converter 1215, and the multiplexer 1214 is switched to couple the second end of the second electrode Y3 to the analog The digital converter 1215 enables the analog-to-digital converter 1215 to read the second output signal (Sy23) from the coupled second electrode Y3 and provide the second output signal (Sy23) to the processing unit 123, as shown in FIG. 9. Here, the multiplexer 1214 disconnects the second electrodes Y1~Y2, Y4~Y8 and the analog-to-digital converter 1215. Then, the processing unit 123 calculates the first output difference (D23) between the first output signal (Sx23) and the second output signal (Sy23) and compares it with the first difference threshold to obtain the first output difference The value (D23) is greater than the first difference threshold, and then it is determined that there is no effective contact pressure point on the first electrode X2 and the second electrode Y3. In the second detection period, the multiplexer 1211 of the driving and measuring circuit 121 maintains the first terminal of the first electrode X2 to be coupled to a high voltage, and disconnects the first electrodes X1, X3~X8 from the high voltage. At the same time, the multiplexer 1212 of the driving and measuring circuit 121 switches to couple the first end of the second electrode Y7 to a low voltage, and disconnects the second electrodes Y1 to Y6, Y8 from the low voltage. When the first electrode X2 is coupled to a high voltage and the second electrode Y7 is coupled to a low voltage, the multiplexer 1213 of the driving and measuring circuit 121 first couples the second end of the first electrode X2 to the analog-to-digital converter 1215, So that the analog-to-digital converter 1215 reads the first output signal (Sx27) from the coupled first electrode X2 and provides it to the processing unit 123, as shown in FIG. 10. Here, the multiplexer 1213 disconnects the first electrodes X1, X3~X8 and the analog-to-digital converter 1215, and the multiplexer 1214 also disconnects the second electrodes Y1~Y8 and the analog-to-digital converter 1215. Then, the multiplexer 1213 of the driving and measuring circuit 121 switches to disconnect the first electrodes X1~X8 and the analog-to-digital converter 1215, and the multiplexer 1214 switches to couple the second end of the second electrode Y7 to the analog-to-digital converter 1215. The digital converter 1215 enables the analog-to-digital converter 1215 to read the second output signal (Sy27) from the coupled second electrode Y7 and provide the second output signal (Sy27) to the processing unit 123, as shown in FIG. 11. Here, the multiplexer 1214 disconnects the second electrodes Y1 to Y6, Y8 and the analog-to-digital converter 1215. Then, the processing unit 123 calculates the first output difference (D27) between the first output signal (Sx27) and the second output signal (Sy27) and compares it with the first difference threshold to obtain the first output difference The value (D27) is not greater than the first difference threshold, and then it is determined that the first electrode X2 and the second electrode Y7 have an effective contact pressure point Tb. In the third detection period, the multiplexer 1211 of the driving and measuring circuit 121 switches to couple the first terminal of the first electrode X6 to a high voltage, and disconnects the first electrodes X1~X5, X7~X8 from the high voltage . At the same time, the multiplexer 1212 of the driving and measuring circuit 121 switches to couple the first end of the second electrode Y3 to a low voltage, and disconnects the second electrodes Y1~Y2, Y4~Y8 from the low voltage. When the first electrode X6 is coupled to a high voltage and the second electrode Y3 is coupled to a low voltage, the multiplexer 1213 of the driving and measuring circuit 121 first couples the second end of the first electrode X6 to the analog-to-digital converter 1215, So that the analog-to-digital converter 1215 reads the first output signal (Sx63) from the coupled first electrode X6 and provides it to the processing unit 123, as shown in FIG. 12. Here, the multiplexer 1213 disconnects the first electrodes X1~X5, X7~X8 and the analog-to-digital converter 1215, and the multiplexer 1214 also disconnects the second electrodes Y1~Y8 and the analog-to-digital converter 1215. Then, the multiplexer 1213 of the driving and measuring circuit 121 is switched to disconnect the first electrodes X1~X8 and the analog-to-digital converter 1215, and the multiplexer 1214 is switched to couple the second end of the second electrode Y3 to the analog The digital converter 1215 enables the analog-to-digital converter 1215 to read the second output signal (Sy63) from the coupled second electrode Y3 and provide it to the processing unit 123, as shown in FIG. 13. Here, the multiplexer 1214 disconnects the second electrodes Y1~Y2, Y4~Y8 and the analog-to-digital converter 1215. Then, the processing unit 123 calculates the first output difference (D63) between the first output signal (Sx63) and the second output signal (Sy63) and compares it with the first difference threshold to obtain the first output difference The value (D63) is not greater than the first difference threshold, and then it is determined that the first electrode X6 and the second electrode Y3 have an effective contact pressure point Ta. In the fourth detection period, the multiplexer 1211 of the driving and measuring circuit 121 maintains the first terminal of the first electrode X6 to be coupled to a high voltage, and disconnects the first electrodes X1~X5, X7~X8 from the high voltage. At the same time, the multiplexer 1212 of the driving and measuring circuit 121 switches to couple the first end of the second electrode Y7 to a low voltage, and disconnects the second electrodes Y1 to Y6, Y8 from the low voltage. When the first electrode X6 is coupled to a high voltage and the second electrode Y7 is coupled to a low voltage, the multiplexer 1213 of the driving and measuring circuit 121 first couples the second end of the first electrode X6 to the analog-to-digital converter 1215, So that the analog-to-digital converter 1215 reads the first output signal (Sx67) from the coupled first electrode X6 and provides it to the processing unit 123, as shown in FIG. 14. Here, the multiplexer 1213 disconnects the first electrodes X1~X5, X7~X8 and the analog-to-digital converter 1215, and the multiplexer 1214 also disconnects the second electrodes Y1~Y8 and the analog-to-digital converter 1215. Then, the multiplexer 1213 of the driving and measuring circuit 121 switches to disconnect the first electrodes X1~X8 and the analog-to-digital converter 1215, and the multiplexer 1214 switches to couple the second end of the second electrode Y7 to the analog-to-digital converter 1215. The digital converter 1215 enables the analog-to-digital converter 1215 to read the second output signal (Sy67) from the coupled second electrode Y7 and provide it to the processing unit 123, as shown in FIG. 15. Here, the multiplexer 1214 disconnects the second electrodes Y1 to Y6, Y8 and the analog-to-digital converter 1215. Then, the processing unit 123 calculates the first output difference (D67) between the first output signal (Sx67) and the second output signal (Sy67) and compares it with the first difference threshold to obtain the first output difference The value (D67) is greater than the first difference threshold, and then it is determined that there is no effective contact pressure point on the first electrode X6 and the second electrode Y7.

In this way, the control circuit 12 can eliminate ghost points by performing a Z scan.

1 and 2, after confirming the effective touch point (step S12), the control circuit 12 then performs an XY scan to calculate the coordinates of all the effective touch points (step S13).

In an exemplary example of step S13, referring to FIG. 1, FIG. 2, FIG. 16 and FIG. 17, the driving and measuring circuit 121 sequentially drives all the first electrodes X1 to X8 (step S131). Here, the driving method of any first electrode Xi includes: the driving and measuring circuit 121 provides a high voltage to one end of the first electrode Xi (such as one of the first end and the second end) and provides a low voltage to the first electrode Xi. The other end of the electrode Xi (such as the other of the first end and the second end). When driving any of the first electrodes Xi, the remaining first electrodes are in a floating state. Under the driving of each first electrode Xi, the driving and measuring circuit 121 sequentially measures the output signals of all the second electrodes Y1 to Y8 (hereinafter referred to as the first voltage signal) (step S132). Here, when any second electrode Yj is measured, the remaining second electrodes are in a floating state. Next, the processing unit 123 obtains the coordinates of each effective contact pressure point in the first direction (ie, X) according to the first voltage signal and a first voltage gradient of all the second electrodes Y1 to Y8 associated with each first electrode Xi. Coordinates) (step S133). Then, the driving and measuring circuit 121 changes to sequentially drive the plurality of second electrodes Y1 to Y8 (step S134). Here, the driving method of any second electrode Yj includes: the driving and measuring circuit 121 provides a high voltage to one end of the second electrode Yj (such as one of the first end and the second end) and provides a low voltage to the second electrode Yj. The other end of the electrode Yj (such as the other of the first end and the second end). Here, when driving any of the second electrodes Yj, the remaining second electrodes are in a floating state. Under the driving of each second electrode Yj, the driving and measuring circuit 121 sequentially measures the output signals (hereinafter referred to as second voltage signals) of all the first electrodes X1 to X8 (step S135). Here, when any one of the first electrodes Xi is measured, the remaining first electrodes are in a floating state. Next, the processing unit 123 obtains the coordinates of each effective contact pressure point in the second direction (ie, the Y coordinate) according to the second voltage signal of the first electrodes X1 to X8 associated with each second electrode Yj and a second voltage gradient. ) (Step S136).

For example, the resistive signal sensor 14 has eight first electrodes X1 to X8 and eight second electrodes Y1 to Y8 and two contact points Ta and Tb on it as an example. The multiplexer 1211 couples the first terminal of the first electrode X1 to a high voltage, and the multiplexer 1213 couples the second terminal of the first electrode X1 to a low voltage, thereby driving the first electrode X1 (step S131), such as Shown in Figure 18. Here, the remaining first electrodes X2 to X8 are in a floating state. That is, the multiplexer 1211 disconnects the first electrodes X2 to X8 from the high voltage. The multiplexer 1213 disconnects the first electrodes X2 to X8 from the low voltage, and the multiplexer 1213 also disconnects the first electrodes X1 to X8 and the analog-to-digital converter 1215. Driven by the first electrode X1, the multiplexer 1214 of the driving and measuring circuit 121 sequentially couples the second electrodes Y1 to Y8 to the analog-to-digital converter 1215, so that the analog-to-digital converter 1215 separates from the second electrode Y1~Y8 read the first voltage signals (Vx11~Vx18) of the second electrodes Y1~Y8 associated with the first electrode X1 (step S132). Then, the multiplexer 1211 switches to couple the first end of the first electrode X2 to a high voltage, and the multiplexer 1213 couples the second end of the first electrode X2 to a low voltage, thereby driving the first electrode X2 (step S131), as shown in Figure 19. Here, the remaining first electrodes X1, X3 to X8 are in a floating state. That is, the multiplexer 1211 disconnects the first electrodes X1, X3 to X8 from the high voltage. The multiplexer 1213 disconnects the first electrodes X1, X3 ~ X8 and the low voltage, and the multiplexer 1213 also disconnects the first electrodes X1 ~ X8 and the analog-to-digital converter 1215. Driven by the first electrode X2, the multiplexer 1214 sequentially couples the second electrodes Y1 to Y8 to the analog-to-digital converter 1215, so that the analog-to-digital converter 1215 reads and reads from the second electrodes Y1 to Y8, respectively. The first voltage signal (Vx21~Vx28) of the second electrode Y1~Y8 associated with one electrode X2 (step S132). Then, the multiplexer 1211 switches to couple the first terminal of the first electrode X3 to a high voltage, and the multiplexer 1213 couples the second terminal of the first electrode X3 to a low voltage, thereby driving the first electrode X3 ( Step S131), as shown in Figure 20. Here, the remaining first electrodes X1~X2, X4~X8 are in a floating state. That is, the multiplexer 1211 disconnects the first electrodes X1 to X2 and X4 to X8 from the high voltage. The multiplexer 1213 disconnects the first electrodes X1~X2, X4~X8 and the low voltage, and the multiplexer 1213 also disconnects the first electrodes X1~X8 and the analog-to-digital converter 1215. Driven by the first electrode X3, the multiplexer 1214 of the driving and measuring circuit 121 sequentially couples the second electrodes Y1 to Y8 to the analog-to-digital converter 1215, so that the analog-to-digital converter 1215 separates from the second electrode Y1~Y8 read the first voltage signals (Vx31~Vx38) of the second electrodes Y1~Y8 associated with the first electrode X3 (step S132). By analogy, the analog-to-digital converter 1215 sequentially obtains the first voltage signals (Vx41~Vx48, Vx51~Vx58, Vx61~) of the second electrodes Y1~Y8 associated with each of the first electrodes X4~X8. Vx68, Vx71~Vx78, Vx81~Vx88). Wherein, when measuring any second electrode Yj (that is, it is coupled to the analog-to-digital converter 1215), the remaining second electrodes are in a floating state, that is, the remaining second electrodes are disconnected from the analog-to-digital converter 1215 through the multiplexer 1214 open. In addition, the multiplexer 1211 disconnects the second electrodes Y1 to Y8 from the low voltage, and the multiplexer 1214 disconnects the second electrodes Y1 to Y8 from the high voltage. Here, the processing unit 123 can obtain the X coordinate of the effective contact pressure point Tb according to the first voltage signal (Vx27) and the first voltage gradient of the second electrode Y7 associated with the first electrode X2, and according to the correlation with the first electrode X6 The first voltage signal (Vx63) and the first voltage gradient of the connected second electrode Y3 obtain the X coordinate of the effective touch point Ta (step S133).

After all the first electrodes X1 to X82 are driven, the driving and measuring circuit 121 then sequentially drives the second electrodes Y1 to Y8. Here, the multiplexer 1214 switches to couple the second terminal of the second electrode Y1 to a high voltage, and the multiplexer 1211 switches to couple the first terminal of the second electrode Y1 to a low voltage, thereby driving the second electrode Y1 (step S134), as shown in Fig. 21. Here, the remaining second electrodes Y2 to Y8 are in a floating state. That is, the multiplexer 1211 disconnects the second electrodes Y2 to Y8 from the low voltage. The multiplexer 1214 disconnects the second electrodes Y2 to Y8 from the high voltage, and the multiplexer 1214 also disconnects the second electrodes Y1 to Y8 and the analog-to-digital converter 1215. Driven by the second electrode Y2, the multiplexer 1214 sequentially couples the first electrodes X1 to X8 to the analog-to-digital converter 1215, so that the analog-to-digital converter 1215 reads and reads from the first electrodes X1 to X8, respectively. The second voltage signals (Vy11 to Vy18) of the first electrodes X1 to X8 associated with the two electrodes Y1 (step S135). Then, the multiplexer 1214 switches to couple the second terminal of the second electrode Y2 to a high voltage, and the multiplexer 1211 switches to couple the first terminal of the second electrode Y2 to a low voltage, thereby driving the second electrode Y1 (step S134), as shown in Fig. 22. Here, the remaining second electrodes Y1, Y3 to Y8 are in a floating state. That is, the multiplexer 1211 disconnects the second electrodes Y1, Y3 to Y8 from the low voltage. The multiplexer 1214 disconnects the second electrodes Y1, Y3 ˜ Y8 and the high voltage, and the multiplexer 1214 also disconnects the second electrodes Y1 ˜ Y8 and the analog-to-digital converter 1215. Driven by the second electrode Y3, the multiplexer 1214 of the driving and measuring circuit 121 sequentially couples the first electrodes X1 to X8 to the analog-to-digital converter 1215, so that the analog-to-digital converter 1215 separates from the first electrode X1~X8 read the second voltage signals (Vy21~Vy28) of the first electrodes X1~X8 associated with the second electrode Y2 (step S135). By analogy, the analog-to-digital converter 1215 sequentially obtains the second voltage signals (Vy31~Vy38, Vy41~Vy48, Vy51~) of the first electrodes X1~X8 associated with each of the second electrodes Y3~Y8. Vy58, Vy61~Vy68, Vy71~Vy78, Vy81~Vy88). Wherein, when measuring any first electrode Xi (that is, it is coupled to the analog-to-digital converter 1215), the remaining first electrodes are in a floating state, that is, the remaining first electrodes are disconnected from the analog-to-digital converter 1215 through the multiplexer 1213 open. In addition, the multiplexer 1212 disconnects the first electrodes X1 to X8 from the high voltage, and the multiplexer 1213 disconnects the first electrodes X1 to X8 from the low voltage. Here, the processing unit 123 can obtain the Y coordinate of the effective contact pressure point Ta according to the second voltage signal (Vy63) and the second voltage gradient of the second electrode Y3 associated with the second electrode Y3, and according to the correlation with the second electrode Y7 The second voltage signal (Vy27) and the second voltage gradient of the connected first electrode X2 obtain the Y coordinate of the effective touch point Tb (step S136).

In another example of step S13, the control circuit 12 can perform electrode driving and measurement only for the effective contact pressure point, so as to calculate the coordinates of the effective contact pressure point. Here, referring to FIG. 1, FIG. 19, and FIG. 23, the driving and measuring circuit 121 sequentially drives the first electrodes X2 and X6 corresponding to the effective contact pressure points Tb and Ta (step S131'). Here, the driving method of the first electrode X2 (or X6) corresponding to any effective contact pressure point Tb (or Ta) includes: the driving and measuring circuit 121 provides a high voltage to one end (or X6) of the first electrode X2 (or X6). Such as one of the first terminal and the second terminal) and the other terminal (such as the other of the first terminal and the second terminal) that provides low voltage to the first electrode X2 (or X6). When driving the first electrode X2 (or X6) corresponding to any effective contact pressure point Tb (or Ta), the remaining first electrodes X1, X3~X8 (or X1~X5, X7~X8) are in a floating state. Driven by the first electrode X2 (or X6) corresponding to each effective contact pressure point Tb (or Ta), the driving and measuring circuit 121 measures the second electrode Y7 corresponding to the effective contact pressure point Tb (or Ta) (Or Y3) the first voltage signal (Vx27 (or Vx63)) (step S132'). Here, when measuring any second electrode Y7 (or Y3), the remaining second electrodes Y1~Y6, Y8 (or Y1~Y2, Y4~Y8) are in a floating state. Then, the processing unit 123 obtains the first voltage signal (Vx27 (or Vx63)) and the first voltage gradient corresponding to each effective contact pressure point Tb (or Ta) to obtain the first voltage signal of each effective contact pressure point Tb (or Ta). The coordinates in the direction (ie, X coordinates) (step S133'). Then, the driving and measuring circuit 121 changes to sequentially drive the second electrodes Y7 and Y3 corresponding to the effective touch points Tb and Ta (step S134'). Here, the driving method of the second electrode Y7 (or Y3) corresponding to any effective contact pressure point Tb (or Ta) includes: the driving and measuring circuit 121 provides a high voltage to one end (or Y3) of the second electrode Y7 (or Y3). Such as one of the first terminal and the second terminal) and the other terminal (such as the other of the first terminal and the second terminal) that provides a low voltage to the second electrode Y7 (or Y3). Here, when driving any of the second electrodes Y7 (or Y3), the remaining second electrodes Y1 to Y6, Y8 (or Y1 to Y2, Y4 to Y8) are in a floating state. Driven by the second electrode Y7 (or Y3) corresponding to each effective contact pressure point Tb (or Ta), the driving and measuring circuit 121 measures the first electrode X2 (or Y3) corresponding to the effective contact pressure point Tb (or Ta). Or X6) the second voltage signal (Vy27 (or Vy63)) (step S135'). Here, when measuring the first electrode X2 (or X6) corresponding to any effective contact pressure point Tb (or Ta), the remaining first electrodes X1, X3~X8 (or X1~X5, X7~X8) are floating Connect state. Next, the processing unit 123 obtains the coordinates of each effective contact pressure point Tb (or Ta) in the second direction (ie, Y) according to the second voltage signal corresponding to the effective contact pressure point Tb (or Ta) and a second voltage gradient. Coordinates) (step S136').

For example, the resistive signal sensor 14 has eight first electrodes X1 to X8 and eight second electrodes Y1 to Y8 and two contact points Ta and Tb on it as an example. 23 and 24, the multiplexer 1211 first couples the first end of the first electrode X2 corresponding to the effective contact point Tb to a high voltage, and the multiplexer 1213 first electrode corresponding to the effective contact point Tb The second end of X2 is coupled to a low voltage, so as to drive the first electrode X2 corresponding to the effective touch point Tb (step S131'). Here, the remaining first electrodes X1, X3 to X8 are in a floating state. That is, the multiplexer 1211 disconnects the first electrodes X1, X3 to X8 from the high voltage. The multiplexer 1213 disconnects the first electrodes X1, X3 ~ X8 and the low voltage, and the multiplexer 1213 also disconnects the first electrodes X1 ~ X8 and the analog-to-digital converter 1215. Driven by the first electrode X2, the multiplexer 1214 couples the second electrode Y7 corresponding to the effective contact pressure point Tb to the analog-to-digital converter 1215, so that the analog-to-digital converter 1215 reads the valid value from the second electrode Y7 The first voltage signal (Vx27) corresponding to the touch point Tb (step S132'). When measuring from the second electrode Y7, the remaining second electrodes Y1 to Y6, Y8 are in a floating state, that is, the remaining second electrodes Y1 to Y6, Y8 are disconnected from the analog-to-digital converter 1215 through the multiplexer 1214. In addition, the multiplexer 1211 disconnects the second electrodes Y1 to Y8 from the low voltage, and the multiplexer 1214 disconnects the second electrodes Y1 to Y8 from the high voltage. Here, the processing unit 123 can obtain the X coordinate of the effective touch point Tb according to the first voltage signal (Vx27) and the first voltage gradient corresponding to the effective touch point Tb (step S133'). Next, referring to FIGS. 23 and 25, the multiplexer 1211 switches to couple the first end of the first electrode X6 corresponding to the next effective contact point Ta to a high voltage, and the multiplexer 1213 couples this effective contact point Ta to a high voltage. The second end of the corresponding first electrode X6 is coupled to a low voltage, so as to drive the first electrode X6 corresponding to the effective contact point Ta (step S131'). Here, the remaining first electrodes X1 to X5 and X7 to X8 are in a floating state. That is, the multiplexer 1211 disconnects the first electrodes X1 to X5 and X7 to X8 from the high voltage. The multiplexer 1213 disconnects the first electrodes X1~X5, X7~X8 from the low voltage, and the multiplexer 1213 also disconnects the first electrodes X1~X8 from the analog-to-digital converter 1215. Driven by the first electrode X6, the multiplexer 1214 couples the second electrode Y3 corresponding to the effective contact pressure point Ta to the analog-to-digital converter 1215, so that the analog-to-digital converter 1215 reads the valid value from the second electrode Y3 The first voltage signal (Vx63) corresponding to the touch point Ta (step S132'). Among them, when measuring from the second electrode Y3, the remaining second electrodes Y1~Y2, Y4~Y8 are in the floating state, that is, the remaining second electrodes Y1~Y2, Y4~Y8 pass through the multiplexer 1214 and the analog-to-digital converter 1215 is disconnected. In addition, the multiplexer 1211 disconnects the second electrodes Y1 to Y8 from the low voltage, and the multiplexer 1214 disconnects the second electrodes Y1 to Y8 from the high voltage. Here, the processing unit 123 can obtain the X coordinate of the effective contact pressure point Ta according to the first voltage signal (Vx63) and the first voltage gradient corresponding to the effective contact pressure point Ta (step S133'). Then, referring to FIGS. 23 and 26, the multiplexer 1214 switches to couple the second end of the second electrode Y3 corresponding to the effective contact pressure point Ta to a high voltage, and the multiplexer 1211 switches to correspond to the effective contact pressure point Ta The first end of the second electrode Y3 is coupled to a low voltage, so as to drive the second electrode Y3 corresponding to the effective contact point Ta (step S134'). Here, the remaining second electrodes Y1 to Y2 and Y4 to Y8 are in a floating state. That is, the multiplexer 1211 disconnects the second electrodes Y1 to Y2, Y4 to Y8 from the low voltage. The multiplexer 1214 disconnects the second electrodes Y1~Y2, Y4~Y8 and the high voltage, and the multiplexer 1214 also disconnects the second electrodes Y1~Y8 and the analog-to-digital converter 1215. Driven by the second electrode Y3, the multiplexer 1214 couples the first electrode X6 corresponding to the effective contact pressure point Ta to the analog-to-digital converter 1215, so that the analog-to-digital converter 1215 starts from the first electrode X6 corresponding to the effective contact pressure point Ta. An electrode X6 reads the second voltage signal (Vy63) corresponding to the effective contact pressure point Ta (step S135'). Among them, when measuring the first electrode X6, the remaining first electrodes X1~X5, X7~X8 are in the floating state, that is, the remaining first electrodes X1~X5, X7~X8 pass through the multiplexer 1213 and the analog-to-digital converter 1215 disconnect. In addition, the multiplexer 1212 disconnects the first electrodes X1 to X8 from the high voltage, and the multiplexer 1213 disconnects the first electrodes X1 to X8 from the low voltage. Here, the processing unit 123 can obtain the Y coordinate of the effective contact pressure point Ta according to the second voltage signal (Vy63) and the second voltage gradient corresponding to the effective contact pressure point Ta (step S136'). Next, referring to FIGS. 23 and 27, the multiplexer 1214 switches to couple the second end of the second electrode Y7 corresponding to the effective touch point Tb to a high voltage, and the multiplexer 1211 also switches to the effective touch point. The first end of the second electrode Y7 corresponding to Tb is coupled to a low voltage, so as to drive the second electrode Y7 corresponding to the effective contact point Tb (step S134'). Here, the remaining second electrodes Y1 to Y6, Y8 are in a floating state. That is, the multiplexer 1211 disconnects the second electrodes Y1 to Y6 and Y8 from the low voltage. The multiplexer 1214 disconnects the second electrodes Y1 to Y6 and Y8 from the high voltage, and the multiplexer 1214 also disconnects the second electrodes Y1 to Y8 and the analog-to-digital converter 1215. Driven by the second electrode Y7, the multiplexer 1214 couples the first electrode X2 corresponding to the effective contact pressure point Tb to the analog-to-digital converter 1215, so that the analog-to-digital converter 1215 starts from the first electrode X2 corresponding to the effective contact pressure point Tb. An electrode X2 reads the second voltage signal (Vy27) corresponding to the effective contact pressure point Tb (step S135'). Wherein, when measuring the first electrode X2, the remaining first electrodes X1, X3~X8 are in a floating state, that is, the remaining first electrodes X1, X3~X8 are disconnected from the analog-to-digital converter 1215 via the multiplexer 1213. In addition, the multiplexer 1212 disconnects the first electrodes X1 to X8 from the high voltage, and the multiplexer 1213 disconnects the first electrodes X1 to X8 from the low voltage. Here, the processing unit 123 can obtain the Y coordinate of the effective contact pressure point Tb according to the second voltage signal (Vy27) and the second voltage gradient corresponding to the effective contact pressure point Tb (step S136').

1 and 2, after calculating the coordinates of the effective touch pressure point (step S13), the control circuit 12 again performs a Z scan for the effective touch pressure point to determine whether to adopt the coordinates of each effective touch pressure point (step S14). In an embodiment of step S14, referring to FIG. 1, FIG. 2 and FIG. 28, the control circuit 12 again obtains the output signal of the first electrode corresponding to each effective contact point under high voltage power supply and the corresponding second electrode under low voltage The difference between the output signals under power supply (hereinafter referred to as the second output difference) (step S141), and the effective contact pressure point is adopted according to the first output difference and the second output difference corresponding to each effective contact pressure point The coordinates of (step S142). In an embodiment of step S142, the control circuit 12 calculates the difference between the first output difference corresponding to each effective touch pressure point and its corresponding second output difference (hereinafter referred to as the third output difference), and then Each third output difference is compared with a difference threshold (hereinafter referred to as the second difference threshold). Wherein, when the third output difference corresponding to the effective touch pressure point is greater than the second difference threshold, the control circuit 12 determines that the coordinates of the effective touch pressure point calculated in step S12 are invalid, that is, it is not used (e.g., no report ) The coordinates of this effective touch point. Conversely, when the third output difference corresponding to the effective touch pressure point is not greater than the second difference threshold, the control circuit 12 determines that the coordinates of the effective touch pressure point calculated in step S12 are valid, that is, adopts (e.g., report ( report)) The coordinates of this effective touch point. The second difference threshold can be determined according to the resistance of the resistive signal sensor 14 (such as the resistance of the electrodes and/or the resistance of the wiring, etc.) and the expected sensitivity of the resistive signal sensor 14.

For example, the resistive signal sensor 14 has eight first electrodes X1 to X8 and eight second electrodes Y1 to Y8 and two contact points Ta and Tb on it as an example. Referring to Figure 1, Figure 2, Figure 28 and Figure 29, the driving and measuring circuit 121 first provides a high voltage to the first end of the first electrode X2 corresponding to the first effective contact point Tb (step S1411), and provides a low voltage The voltage reaches the first end of the second electrode Y7 corresponding to the effective contact pressure point Tb (step S1412). At this time, the first electrodes X1, X3~X8 and the second electrodes Y1~Y6, Y8 are all in a floating state. When the first electrode X2 is coupled to a high voltage and the second electrode Y7 is coupled to a low voltage, the driving and measuring circuit 121 measures the first output of the first electrode X2 from the second end of the first electrode X2 under high voltage power supply Signal (Sx27') (as shown in Figure 10) (step S1413), and measure the second output signal (Sy27') of the second electrode Y7 under low-voltage power supply from the second end of the second electrode Y7 (as shown in Figure 11) (Step S1414). Then, the processing unit 123 receives the first output signal (Sx27') and the second output signal (Sy27'), and calculates the difference between the first output signal (Sx27') and the second output signal (Sy27'), namely The second output difference (D27') (step S1415). The processing unit 123 calculates the third output difference (E27) between the first output difference (D27) and the second output difference (D27') corresponding to the effective touch pressure point Tb (step S1421), and compares the third output The difference (E27) and the second difference threshold (step S1422) are used to confirm whether the third output difference (E27) is greater than the second difference threshold. When the third output difference (E27) corresponding to the effective touch pressure point Tb is greater than the second difference threshold, it means that the effective touch pressure point Tb is a quick-click touch form (that is, after the first Z scan is executed, touch The control element has left the position of the effective touch point Tb), so the processing unit 123 determines that the coordinates of the effective touch point Tb calculated in step S12 are invalid, that is, the effective touch point Tb is not used (eg, not reported) (Step S1423). Conversely, when the third output difference (E23) corresponding to the effective touch pressure point Tb is not greater than the second difference threshold, it represents that the effective touch pressure point Tb is a touch form that is not a quick click, so the processing unit 123 determines step S12 The calculated coordinates of the effective pressure point Tb are valid, that is, the coordinates of the effective pressure point Tb are used (eg, reported) (step S1424). Next, referring to FIGS. 1, 2, 28, and 29, the driving and measuring circuit 121 switches to provide a high voltage to the first end of the first electrode X6 corresponding to the next effective contact point Ta (step S1411), and Switching to provide a low voltage to the first end of the second electrode Y3 corresponding to the effective contact pressure point Ta (step S1412). At this time, the first electrodes X1 to X5, X7 to X8 and the second electrodes Y1 to Y2, Y4 to Y8 are all in a floating state. When the first electrode X6 is coupled to a high voltage and the second electrode Y3 is coupled to a low voltage, the driving and measuring circuit 121 measures the first output of the first electrode X6 from the second end of the first electrode X6 under high voltage power supply Signal (Sx63') (as shown in Figure 12) (step S1413), and measure the second output signal (Sy63') of the second electrode Y3 under low-voltage power supply from the second end of the second electrode Y3 (as shown in Figure 13) (Step S1414). Then, the processing unit 123 receives the first output signal (Sx63') and the second output signal (Sy63'), and calculates the difference between the first output signal (Sx63') and the second output signal (Sy63'), namely The second output difference (D63') (step S1415). The processing unit 123 calculates the third output difference (E63) between the first output difference (D63) and the second output difference (D63') corresponding to the effective touch pressure point Tb (step S1421), and compares the third output The difference (E23) and the second difference threshold (step S1422) are used to confirm whether the third output difference (E63) is greater than the second difference threshold. When the third output difference (E63) corresponding to the effective touch pressure point Ta is greater than the second difference threshold, it represents that the effective touch pressure point Ta is a quick-click touch mode, so the processing unit 123 determines that this is calculated in step S12 The coordinates of the effective pressure point Ta are invalid, that is, the coordinates of the effective pressure point Ta are not used (eg, not reported) (step S1423). Conversely, when the third output difference (E63) corresponding to the effective touch pressure point Ta is not greater than the second difference threshold, it represents that the effective touch pressure point Ta is a touch form that is not a quick click, so the processing unit 123 determines step S12 The calculated coordinates of the effective pressure point Ta are valid, that is, the coordinates of the effective pressure point Ta are used (eg, reported) (step S1424).

In this way, the control circuit 12 can deal with the coordinate shift caused by the rapid click by comparing the results of the two Z scans before and after.

In some embodiments, the processing unit 123 may be a microprocessor, a microcontroller, a digital signal processor, a central processing unit, a programmable logic controller, an analog circuit, a digital circuit, or any analog and/or operation signal based on operation instructions. Or digital device.

In some embodiments, one or more storage units may be provided inside and/or outside the processing unit 123. Here, the storage unit is used to store related software/firmware programs, data, data, and combinations thereof. Each storage unit can be realized by memory.

It should be clear that although some embodiments take two contact pressure points Ta and Tb as examples, the number of contact pressure points is not a limitation of the present invention; in other words, the execution steps based on the foregoing embodiments can also be applied to a single, Or the detection of touch events of three or more touch pressure points. The "first" and "second" mentioned in the aforementioned terms are only used to distinguish two elements with the same term, and are not used to limit a specific element. For example, under the same operating principle, X1~X8 can be renamed as the second electrode, and Y1~Y8 can be renamed as the first electrode.

It should be noted that although the steps described above are described in order, this order is not a limitation of the present invention. Those familiar with the relevant art should understand that the order of execution of some steps can be performed simultaneously or reversed under reasonable circumstances.

In summary, according to the resistive touch device and resistive touch sensing method of the present invention, it can speed up the determination of touch pressure points, and can avoid the misjudgment of light clicks, quick clicks or ghost points.

10: Resistive touch device

12: Control circuit

121: drive and measurement circuit

1211: multiplexer

1212: multiplexer

1213: multiplexer

1214: multiplexer

1215: Analog-to-digital converter

123: Processing Unit

14: Resistive signal sensor

X1~X8: first electrode

Y1~Y8: second electrode

Ta: contact point

Tb: contact point

R1: Lower impedance

R2: Upper impedance

Rz: Z axis impedance

Sx23: The first output signal

Sy23: second output signal

S11~S14: steps

S111~S119: steps

S121~S128: steps

S121’~S128’: Steps

S131~S136: steps

S131’~S136’: Steps

S141~S142: steps

S1411~S1415: steps

S1421~S1424: steps

FIG. 1 is a schematic diagram of a resistive touch device according to an embodiment. FIG. 2 is a flowchart of a resistive touch sensing method according to an embodiment. FIG. 3 is a detailed flowchart of an exemplary example of step S11 in FIG. 2. 4 is a schematic diagram of an exemplary operation of the resistive touch device of FIG. 1. FIG. 5 is a detailed flowchart of an exemplary example of step S12 in FIG. 2. FIG. 6 is a detailed flowchart of another exemplary example of step S12 in FIG. 2. FIG. 7 is a schematic diagram of the iso-calibration circuit structure of the resistive touch device of FIG. 1 based on steps S121' to S124' of FIG. 6. 8 to 15 are schematic diagrams showing the operation of an exemplary embodiment of the resistive touch device of FIG. 1 based on steps S121' to S128' of FIG. 6. 16 to 17 are detailed flowcharts of an exemplary example of step S13 in FIG. 2. 18-22 are based on the steps S131 to S133 of FIG. 16 and the steps S134 to S136 of FIG. 17, the operation schematic diagram of an exemplary embodiment of the resistive touch device of FIG. 1. FIG. 23 is a detailed flowchart of another exemplary example of step S13 in FIG. 2. 24 to 27 are schematic diagrams showing the operation of an exemplary resistive touch device of FIG. 1 based on steps S131' to S136' of FIG. 23. FIG. 28 is a detailed flowchart of an exemplary example of step S14 in FIG. 2. FIG. 29 is a detailed flowchart of an exemplary example of steps S141 to S142 in FIG. 28.

S11~S14: steps

Claims (9)

A resistive touch sensing method is suitable for a resistive signal sensor. The resistive signal sensor includes a plurality of first electrodes and a plurality of second electrodes. The resistive touch sensing method includes: Detecting the plurality of first electrodes according to a high voltage threshold to determine whether there is a first activation signal; Detecting the plurality of second electrodes according to a low voltage threshold to determine whether there is a second activation signal; When any one of the first activation signal and any one of the second activation signal are present, at least one effective contact pressure point on the resistive signal sensor is detected, wherein each of the effective contact pressure points corresponds to the first electrode A first output difference between a high voltage power supply and a corresponding second electrode under a low voltage power supply is greater than a difference threshold; Calculate the coordinates of the at least one effective contact pressure point; Obtaining again a second output difference between the first electrode corresponding to each of the effective contact pressure points under the high voltage power supply and the corresponding second electrode under the low voltage power supply; and The coordinates of the effective contact pressure point are adopted according to the first output difference value and the second output difference value corresponding to each of the effective contact pressure points. The resistive touch sensing method according to claim 1, wherein the step of detecting the plurality of first electrodes according to the high voltage threshold to determine whether there is the first activation signal includes: Providing the high voltage to the first end of the plurality of first electrodes; Measuring the output signal of the first electrode under the high-voltage power supply from the second end of each of the first electrodes; Comparing the output signal of each of the first electrodes with the high voltage threshold; When the output signal is less than the high voltage threshold, determining that the corresponding first electrode has the first activation signal; and When the output signal is not less than the high voltage threshold, it is determined that the corresponding first electrode does not have the first activation signal. The resistive touch sensing method according to claim 1, wherein the step of detecting the plurality of second electrodes according to the low voltage threshold to determine whether there is the second activation signal includes: Providing the low voltage to the first end of the plurality of second electrodes; Measuring the output signal of the second electrode under the low-voltage power supply from the second end of each of the second electrodes; Comparing the output signal of each of the second electrodes with the low voltage threshold; When the output signal is greater than the low voltage threshold, determining that the corresponding second electrode has the second activation signal; and When the output signal is not greater than the low voltage threshold, it is determined that the corresponding second electrode does not have the second activation signal. The resistive touch sensing method according to claim 1, wherein the step of detecting the at least one effective touch pressure point on the resistive signal sensor includes: Sequentially supplying the high voltage to the first end of the plurality of first electrodes, wherein when the high voltage is supplied to the first end of any one of the first electrodes, the remaining first electrodes are in a floating state; Sequentially supplying the low voltage to the first end of the plurality of second electrodes, wherein when the low voltage is supplied to the first end of any one of the second electrodes, the remaining second electrodes are in a floating state; Measuring a first output signal of the first electrode under the high-voltage power supply from the second end of each of the first electrodes; Measuring a second output signal of the second electrode under the low-voltage power supply from the second end of each of the second electrodes; Calculating the first output difference between the first output signal of each of the first electrodes and the second output signal of each of the second electrodes; Comparing each of the first output difference with the difference threshold; When the first output difference is greater than the difference threshold, determining that the first electrode and the second electrode corresponding to the first output difference do not have the effective contact pressure point; and When the first output difference is not greater than the difference threshold, it is determined that the first electrode and the second electrode corresponding to the first output difference have the effective contact pressure point. The resistive touch sensing method according to claim 1, wherein the step of detecting the at least one effective touch pressure point on the resistive signal sensor includes: Provide the high voltage to the first end of the first electrode corresponding to each of the first activation signals, wherein when the high voltage is supplied to the first end of any one of the first electrodes, the first ends of the remaining first electrodes The end is in a floating state; Provide the low voltage to the first end of the second electrode corresponding to each of the second activation signals, wherein when the low voltage is supplied to the first end of any one of the second electrodes, the first ends of the remaining second electrodes The end is in a floating state; Measuring a first output signal of the first electrode under the high-voltage power supply from the second end of the first electrode corresponding to each of the first activation signals; Measuring a second output signal of the second electrode under the low-voltage power supply from the second end of the second electrode corresponding to each of the first activation signals; Calculating the first output difference between each of the first output signals and each of the second output signals; Comparing each of the first output difference with the difference threshold; When the first output difference is greater than the difference threshold, determining that the first electrode and the second electrode corresponding to the first output difference do not have the effective contact pressure point; and When the first output difference is not greater than the difference threshold, it is determined that the first electrode and the second electrode corresponding to the first output difference have the effective contact pressure point. The resistive touch sensing method according to claim 1, wherein the step of calculating the coordinates of the at least one effective touch pressure point includes: Sequentially driving the plurality of first electrodes, wherein the driving step of any one of the first electrodes includes providing the high voltage to one end of the first electrode and providing the low voltage to the other end of the first electrode, and wherein the driving When any one of the first electrodes, the remaining first electrodes are in a floating state; Under the driving of each of the first electrodes, sequentially measure the first voltage signals of the plurality of second electrodes, wherein when any one of the second electrodes is measured, the remaining second electrodes are in a floating state; Obtaining the coordinates of each effective contact pressure point in the first direction according to the plurality of first voltage signals and a first voltage gradient of the plurality of second electrodes associated with each of the first electrodes; Sequentially driving the plurality of second electrodes, wherein the driving step of any one of the second electrodes includes providing the high voltage to one end of the second electrode and providing the low voltage to the other end of the second electrode, and wherein the driving When any one of the second electrodes, the remaining second electrodes are in a floating state; Under the driving of each of the second electrodes, sequentially measure the second voltage signals of the plurality of first electrodes, wherein when any one of the first electrodes is measured, the remaining first electrodes are in a floating state; and The coordinates of each effective contact pressure point in the second direction are obtained according to the plurality of second voltage signals and a second voltage gradient of the plurality of first electrodes associated with each of the second electrodes. The resistive touch sensing method according to claim 1, wherein the step of calculating the coordinates of the at least one effective touch pressure point includes: Sequentially driving the first electrode corresponding to the at least one effective contact pressure point, wherein the driving step of the first electrode corresponding to any one of the effective contact pressure points includes providing the high voltage to the first electrode corresponding to the effective contact pressure point A first end of an electrode and a second end that provides the low voltage to the first electrode corresponding to the effective contact pressure point, and wherein when the first electrode corresponding to any one of the effective contact pressure points is driven, the remaining first electrodes One electrode is in a floating state; Under the driving of the first electrode corresponding to each effective contact pressure point, the first voltage signal of the second electrode corresponding to the effective contact pressure point is measured. When the second electrode is used, the remaining second electrodes are in a floating state; Obtaining the coordinates of each effective contact pressure point in the first direction according to the first voltage signal and a first voltage gradient corresponding to each effective contact pressure point; Sequentially driving the second electrode corresponding to the at least one effective contact pressure point, wherein the driving step of the second electrode corresponding to any one of the effective contact pressure points includes providing the high voltage to the first electrode corresponding to the effective contact pressure point The first end of the two electrodes and the second end that provides the low voltage to the second electrode corresponding to the effective contact pressure point, and wherein when the second electrode corresponding to any one of the effective contact pressure points is driven, the remaining first electrodes The two electrodes are in a floating state; Under the driving of the second electrode corresponding to each effective contact pressure point, the second voltage signal of the first electrode corresponding to the effective contact pressure point is measured. When the first electrode, the remaining first electrodes are in a floating state; and The coordinates of each effective contact pressure point in the second direction are obtained according to the second voltage signal and a second voltage gradient corresponding to each effective contact pressure point. The resistive touch sensing method according to claim 1, wherein the first electrode corresponding to each of the effective touch pressure points under the high-voltage power supply and the corresponding second electrode under the low-voltage power supply are obtained again. The step of outputting the second difference includes: The high voltage is provided to the first end of the first electrode corresponding to the effective contact pressure point, wherein when the high voltage is provided to the first end of the first electrode corresponding to the effective contact pressure point, the remaining first electrodes The electrode is in a floating state; Provide the low voltage to the first end of the second electrode corresponding to the effective contact pressure point, wherein when the low voltage is provided to the first end of the second electrode corresponding to the effective contact pressure point, the remaining second electrodes The electrode is in a floating state; Measuring a first output signal of the first electrode under the high-voltage power supply from the second end of the first electrode corresponding to the effective contact pressure point; Measuring a second output signal of the second electrode under the low-voltage power supply from the second end of the second electrode corresponding to the effective contact pressure point; and Calculate the second output difference between the first output signal and the second output signal corresponding to the effective contact pressure point. A resistive touch device, including: A resistive signal sensor, including: A plurality of first electrodes arranged in parallel with each other; and A plurality of second electrodes are arranged in parallel with each other and overlap the plurality of first electrodes at intervals; and A control circuit, coupled to the plurality of first electrodes and the plurality of second electrodes, executes: Detecting the plurality of first electrodes according to a high voltage threshold to determine whether there is a first activation signal; Detecting the plurality of second electrodes according to a low voltage threshold to determine whether there is a second activation signal; When any one of the first activation signal and any one of the second activation signal are present, at least one effective contact pressure point on the resistive signal sensor is detected, wherein each of the effective contact pressure points corresponds to the first electrode A first output difference between a high voltage power supply and a corresponding second electrode under a low voltage power supply is greater than a difference threshold; Calculate the coordinates of each effective contact pressure point; Obtaining again a second output difference between the first electrode corresponding to each of the effective contact pressure points under the high voltage power supply and the corresponding second electrode under the low voltage power supply; and The coordinates are adopted according to the first output difference and the second output difference.

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