TW201842439A - Detecting apparatus and method for touch screen and touch sensitive system - Google Patents

Abstract

The present invention provides a detecting apparatus for a touch screen. The detecting apparatus comprises: a driving circuit; a detecting circuit; and a control module, which is configured for selecting one of parameter sets as an initial parameter set for base conductive strip to generate an evaluation signal, wherein the detecting circuit generates the evaluation signal as a level signal according to the initial parameter set, wherein comparing with other evaluation signals generated according to other parameter sets, the evaluation signal generated according to the initial parameter set corresponding to one or one set of non-base conductive strip is the closet to the level signal.

Description

   Detection device and method for touch screen and touch system   

The invention relates to a method and a device for measuring a capacitive touch screen, in particular to a method and a device for measuring a capacitive touch screen that generates a level image.

The capacitive touch screen changes the detection signal through capacitive coupling with the human body, thereby determining the position where the human body touches on the capacitive touch screen. When the human body touches, the noise of the human body's environment will also be injected with the capacitive coupling between the human body and the capacitive touch screen, which will also change the detection signal. And because the noise is constantly changing, it is not easy to predict. When the noise is relatively small, it is easy to cause the touch to be judged or the position of the touch to be judged to be misaligned.

In addition, because the signal passes through some load circuits, such as through capacitive coupling, a phase difference will occur between the signal received by the detection conductive strip and the signal before it is provided to drive the conductive strip. When the periods of the driving signals are the same, different phase differences indicate that the signals are received at different time delays. If the signal is ignored and the signal is detected directly, the starting phase of the signal measurement will be different and different results will be produced. If the measurement results corresponding to different conductive bars are very different, it will be difficult to determine the correct position.

In addition, compared to different driving conductive strips, the resistance value of the resistance-capacitance circuit through which the driving signal passes may also be different, which will cause the value of the image obtained by the touch screen during mutual capacitance detection to be high or low, which is not conducive to detection.

It can be seen that the above-mentioned prior art obviously has inconveniences and defects, and further improvement is needed. In order to solve the above-mentioned problems, the relevant manufacturers have made every effort to find a solution, but for a long time no applicable design has been developed and the general products and methods have no appropriate structure and methods to solve the above problems. Obviously, it is a problem that relevant industry operators are anxious to solve. Therefore, how to create a new technology is really one of the important R & D topics at present, and it has become a goal that the industry needs to improve.

In a resistor-capacitor circuit (RC circuit), the signal varies depending on the load that passes through it. The purpose of the present invention is to provide different detection parameters corresponding to different driving conductive strips, so that the signals detected according to the detection parameters of each driving conductive strip can be approached as much as possible, so as to enable the signals of the images detected by the touch screen. Optimization or best leveling.

The object of the present invention and its technical problems are solved by using the following technical solutions. A signal measurement device for a touch screen according to the present invention includes a touch screen. The touch screen includes a plurality of conductive bars composed of a plurality of driving conductive bars arranged in parallel and a plurality of detecting conductive bars arranged in parallel. A strip and the detection conductive strip overlap in a plurality of overlapping areas; a driving circuit provides a driving signal to one or a set of driving conductive strips, wherein one or a set of the driving conductive strips of the driving conductive strips Is a reference conductive strip, and other strips or other groups of driving conductive strips are non-reference conductive strips; with a detection circuit, each time a driving signal is provided, at least one detection conductive strip is based on one of a plurality of parameter groups. The signal generates an evaluation signal of the driving conductive strip provided with the driving signal; and a control circuit, which selects a set of initial parameter sets of the reference conductive strip from the parameter set, so as to be evaluated by the detection circuit based on the initial parameter set. The signal is used as a level signal, and the initial parameter group of each or each group of non-reference conductive bars is selected by the parameter group, and each or every The evaluation signals generated by the group of non-reference conductive strips based on the initial parameter group are closer to the level signals than the evaluation signals generated by other parameter groups.

The objective of the present invention and its technical problems can also be achieved by using the following technical solutions. A method for measuring a signal of a touch screen according to the present invention includes: providing a touch screen. The touch screen includes a plurality of conductive bars composed of a plurality of driving conductive bars arranged in parallel and a plurality of detecting conductive bars arranged in parallel. The conductive strips overlap the detection conductive strips in a plurality of overlapping areas; one or a group of the driving conductive strips of the driving conductive strips are selected as the reference conductive strips, and other driving strips or other groups of the driving conductive strips are used as non-references Conductive strip; providing a driving signal to the reference conductive strip, and detecting the signal of the at least one detected conductive strip according to one of the parameter groups; the signal of the at least one detected conductive strip is not When within the preset signal range, sequentially detect the signal of the at least one detection conductive strip according to one of the other parameter groups until the signal of the at least one detection conductive strip falls within the preset signal range; The at least one signal that detects that the conductive strip falls within a preset signal range when the reference conductive strip is provided with a driving signal is used as a level signal, and the parameter based on the reference conductive strip is The group is used as the initial parameter group of the reference conductive strip; the driving signals are provided to each or each non-reference conductive strip sequentially in sequence; when each or each of the non-reference conductive strips is provided with a driving signal, the driving signals are sequentially based on the The parameter set described above is used to detect the signal of the at least one detected conductive strip; and an initial parameter set for determining the non-reference conductive strip in each or each set of non-reference conductive strips, wherein the non-reference conductive The strip is provided with a driving signal value. The signal of the at least one detected conductive strip detected according to the initial parameter group is closer to the level signal than the signal of the at least one detected conductive strip detected according to other parameter groups.

According to an embodiment of the present invention, a detection device for a touch screen is provided, including: a driving circuit for providing a driving signal to one or a group of driving conductive strips of the touch screen, one of which is One set of the driving conductive strips is designated as one or a group of reference conductive strips, and the rest of the driving conductive strips are designated as non-reference conductive strips. A detection circuit is used to determine a parameter set based on one of a plurality of parameter sets. Testing at least one detection conductive strip of the touch screen to generate an evaluation signal corresponding to the driving conductive strip provided with the driving signal, wherein the driving signal is provided to the driving conductive strip according to the parameter set; and A control module for selecting one of the plurality of parameter sets as an initial parameter set of the reference conductive strip to generate the evaluation signal, wherein the detection signal according to the initial parameter set is designated as A leveling signal, wherein an initial parameter set corresponding to each or each of the non-reference conductive strips is selected from the plurality of parameter sets, Compared with other evaluation signal generated by the set of parameters, the set of parameters based on the evaluation signal, or each group of each set of the corresponding initial parameters of the non-reference conductive strip produced it is closest to the level of the reference signal.

In this embodiment, in order to obtain the initial parameter set under the optimal driving signal sensing condition, the control module is used to control the detection circuit to sequentially generate the parameter set according to each parameter set in the plurality of parameter sets. The evaluation signal, wherein the parameter set used to generate the largest of the evaluation signals of the reference conductive strip is designated as the initial parameter set corresponding to the reference conductive strip.

In this embodiment, in order to save time to obtain an initial parameter set under a sufficiently good driving signal sensing condition, the control module is used to control the detection circuit to sequentially according to each parameter set of the plurality of parameter sets. To generate the evaluation signal, wherein the parameter set that first meets a condition in the evaluation signal for generating the reference conductive strip is designated as the initial parameter set corresponding to the reference conductive strip.

In this embodiment, in order to save time to obtain an initial parameter set, the evaluation signal is a signal measured through a detection conductive strip.

In this embodiment, in order to save more time to obtain the initial parameter set, the evaluation signal is the sum of the signals measured by at least two of the detection conductive bars.

In this embodiment, in order to obtain a more leveled image, the driving signal passes through a variable resistor to reach at least one detection conductive strip, and the impedance of the variable resistor is corresponding when the driving signal is provided. An initial parameter in the initial parameter set is changed.

In this embodiment, in order to obtain a more leveled image, the detection circuit changes the detection time length according to an initial parameter in the corresponding initial parameter set when the driving signal is provided.

In this embodiment, in order to obtain a more leveled image, the driving signal is provided to the driving conductive bar after being amplified by a signal amplifier, and an amplification factor of the signal amplifier is based on a corresponding initial parameter when the driving signal is provided. An initial parameter of the set varies.

In this embodiment, in order to obtain a more leveled image, the detection circuit measures a signal of the at least one detection conductive strip after a delay phase difference, and when the detection circuit is provided according to the driving signal, Corresponding to an initial parameter of the initial parameter set, the delay phase difference is changed.

According to an embodiment of the present invention, a touch system is provided, including the touch screen and the detection device described above.

According to an embodiment of the present invention, a detection method for a touch screen is provided, which includes: designating one or a group of driving conductive strips of the touch screen as one or a group of reference conductive strips, and designating the remaining driving conductive strips. Is a non-reference conductive strip; provides a driving signal to the reference conductive strip of the touch screen; and sequentially measures at least one detection conductive strip of the touch screen according to each parameter set of a plurality of parameter sets, until The measurement result falls within a preset signal range; the measurement signal falling within the preset signal range is designated as a leveling signal, and the parameter set corresponding to the leveling signal is designated as the reference An initial parameter set of the conductive strips; sequentially providing the driving signal to each or each of the non-reference conductive strips; sequentially detecting at least one conductive strip of the touch screen according to each parameter set of the plurality of parameter sets Perform measurement; and determine the initial parameter set of each or each group of the non-reference conductive strips, wherein when the driving signal is separately provided to each or each group For the non-reference conductive strip, a signal obtained from the at least one detected conductive strip according to the initial parameter set is closer to the level signal than a signal obtained from the at least one detected conductive strip according to other parameter sets.

In an embodiment, in order to obtain a more leveled image, the driving signal passes through a variable resistor to reach the at least one detection conductive strip, and the impedance of the variable resistor is corresponding when the driving signal is provided. An initial parameter in the initial parameter set is changed.

In one embodiment, in order to obtain a more leveled image, the detection time length is changed according to an initial parameter in the corresponding initial parameter set when the driving signal is provided.

In one embodiment, in order to obtain a more leveled image, the driving signal is provided to the driving conductive bar after being amplified by a signal amplifier, and the amplification factor of the signal amplifier is corresponding to the driving signal when the driving signal is provided An initial parameter of the initial parameter set varies.

In an embodiment, in order to obtain a more leveled image, the signal of the at least one detection conductive strip is measured after a delay phase difference, and the delay phase difference is corresponding to the time when the driving signal is provided. An initial parameter of the initial parameter set varies.

With the above technical solution, the present invention has at least the following advantages and beneficial effects: corresponding to different driving conductive bars and different detection parameters, the signal of the image detected by the touch screen can be optimized or leveled.

11‧‧‧Clock Circuit

12‧‧‧Pulse width adjustment circuit

131‧‧‧Drive switch

132‧‧‧Detection switch

141‧‧‧Drive selection circuit

142‧‧‧Detection selection circuit

151‧‧‧Drive electrode

152‧‧‧detection electrode

16‧‧‧Variable resistor

17‧‧‧ amplifier circuit

18‧‧‧Measurement circuit

19‧‧‧ External conductive objects

41‧‧‧Drive circuit

42‧‧‧detection circuit

43‧‧‧Storage Circuit

44‧‧‧Frequency setting

45‧‧‧Control circuit

51‧‧‧ full image

52‧‧‧One-dimensional sensing information driven by single electrode

62‧‧‧One-dimensional sensing information driven by two electrodes

61‧‧‧internal image

71‧‧‧External image

721‧‧‧One-dimensional sensing information driven by single electrode on the first side

722‧‧‧One-dimensional sensing information driven by single electrode on the second side

S‧‧‧ drive signal

1300‧‧‧Touch system

1310‧‧‧Touch screen or panel

1311‧‧‧Drive conductive strip

1312‧‧‧ Detecting conductive strips

1320‧‧‧ Detection Device

1330‧‧‧Drive circuit

1340‧‧‧detection circuit

1350‧‧‧Control Module

1210 ~ 1280‧‧‧ steps

1410 ~ 1470‧‧‧step

1 and 4 are schematic diagrams of a capacitive touch screen and a control circuit thereof according to the present invention; FIG. 2A is a schematic diagram of a single-electrode driving mode; FIG. 2B and FIG. 2C are schematic diagrams of a dual-electrode driving mode; and FIGS. 3A and 3B are FIG. 5 is a schematic diagram of generating a complete image; FIG. 6 is a schematic diagram of generating a shrinking image; FIG. 7A and FIG. 7B are schematic diagrams of generating an expanded image; FIG. 8 FIG. 9A and FIG. 9B are schematic diagrams of driving signals generating different phase differences through different driving conductive strips; and FIG. 10 and FIG. 11 are signals of a touch screen according to the first embodiment of the present invention. FIG. 12 is a schematic flowchart of another touch screen signal measurement method according to the present invention; FIG. 13 is a block schematic diagram of a touch detection system according to an embodiment of the present invention; and FIG. 14 is a diagram according to the present invention. A flowchart of a touch detection method according to an embodiment of the invention.

The present invention will be described in detail in the following examples. However, in addition to the disclosed embodiments, the present invention can also be widely applied to other embodiments. The scope of the present invention is not limited by these embodiments, but is subject to the scope of subsequent patent applications. In order to provide a clearer description and enable those skilled in the art to understand the invention, the parts in the diagram are not drawn according to their relative sizes. The proportions of certain sizes to other relevant dimensions will be highlighted. It looks exaggerated, and the irrelevant details are not completely drawn in order to keep the illustration simple.

Capacitive touch screens are susceptible to noise interference, especially from humans who touch the touch screen. The invention adopts an adaptive driving mode to achieve the purpose of reducing noise interference.

The capacitive touch screen includes a plurality of electrodes arranged vertically and horizontally to detect the position of the touch. The power consumption is positively related to the number of electrodes driven at the same time and the voltage driven. During touch detection, noise may be conducted to the capacitive touch screen along with the conductor of the touch, making the signal-to-noise ratio (S / N ratio) worse, which may easily cause misjudgment and position deviation of the touch. In other words, the signal-to-noise ratio changes dynamically with the touched object and the environment.

Please refer to FIG. 1, which is a schematic diagram of a capacitive touch screen and a control circuit thereof according to the present invention, including a clock circuit 11, a pulse width modulation circuit 12, a drive switch 131, a detection switch 132, and a drive selection. The circuit 141, a detection selection circuit 142, at least one driving electrode 151, at least one detection electrode 152, a variable resistor 16, an amplifier circuit 17, and a measurement circuit 18. The capacitive touch screen may include a plurality of driving electrodes 151 and a plurality of detecting electrodes 152, and the driving electrodes 151 and the detecting electrodes 152 overlap at a plurality of overlapping positions.

The clock circuit 11 provides a clock signal of the entire system according to an operating frequency, and the pulse width modulation circuit 12 provides a pulse width modulation signal according to the clock signal and a pulse width modulation parameter to drive the driving electrode 151. The driving switch 131 controls driving of the driving electrodes, and at least one driving electrode 151 is selected by the selection circuit 141. In addition, the detection switch 132 controls the electrical coupling between the driving electrode and the measurement circuit 18. When the driving switch 131 is on, the detection switch 132 is off, and the pulse width modulation signal is provided to the driving electrode 151 coupled by the driving selection circuit 141 via the driving selection circuit 141. The driving electrode 151 may be There are multiple, and the selected driving electrodes 151 may be one, two, or more of the driving electrodes 151. When the driving electrode 151 is driven by a pulse width modulation signal, a capacitive coupling 152 is generated at the overlap of the detection electrode 152 and the driven driving electrode 151, and each detection electrode 152 has a capacitance with the driving electrode 151. Provides an input signal during sexual coupling. The variable resistor 16 provides an impedance according to a resistance parameter. The input signal is provided to the detection selection circuit 142 through the variable resistance 16. The detection selection circuit 142 selects one, two, three, A plurality of or all of the detection electrodes 152 are coupled to the amplification circuit 17, and the input signal is provided to the measurement circuit 18 through the amplification circuit 17 according to a gain parameter. The measurement circuit 18 detects an input signal based on a pulse width modulation signal and a pulse signal. The measurement circuit 18 may sample the detection signal based on a phase parameter in at least one phase. For example, the measurement circuit 18 may have at least An integration circuit, each of which integrates an input signal of the input signals in at least one phase according to a phase parameter to measure the magnitude of the input signal. In an example of the present invention, each of the integrating circuits may further integrate a signal difference of a pair of input signals among the input signals according to a phase parameter in at least one phase, or separately in accordance with the phase parameter in at least one phase. The difference between the signal differences of the two pairs of input signals in the input signals is integrated. In addition, the measurement circuit 18 may further include an analog-to-digital converter (ADC) that converts the result detected by the integration circuit into a digital signal. In addition, a person of ordinary skill in the art with ordinary knowledge can infer that the aforementioned input signal may be amplified by the amplifier circuit 17 and then provided by the detection selection circuit 142 to the measurement circuit 18, which is not limited in the present invention.

In the present invention, the capacitive touch screen has at least two driving modes, which are divided into the most power-saving single-electrode driving mode and the two-electrode driving mode, and has at least one driving potential. Each driving mode has at least one operating frequency corresponding to different driving potentials, each operating frequency corresponds to a set of parameters, and each driving mode corresponds to different driving potentials representing different degrees of power consumption.

The electrodes of the capacitive touch screen can be divided into a plurality of driving electrodes 151 and a plurality of detecting electrodes 152, and the driving electrodes 151 and the detecting electrodes 152 overlap at a plurality of intersections. Please refer to FIG. 2A. In the single-electrode driving mode, one driving electrode 151 is driven at a time, that is, only one driving electrode 151 is provided with a driving signal S at the same time. When any one driving electrode 151 is driven, all detection electrodes are detected. 152 signals to generate one-dimensional sensing information. According to this, after driving all the driving electrodes 151, one-dimensional sensing information corresponding to each driving electrode 151 can be obtained, so as to form a complete image with respect to all overlaps.

Please refer to FIGS. 2B and 2C. In the two-electrode driving mode, a pair of adjacent driving electrodes 151 are driven at one time. In other words, n driving electrodes 151 are driven n-1 times in total, and when any pair of driving electrodes 151 are driven, the signals of all detection electrodes 152 are detected to generate one-dimensional sensing information. For example, as shown in FIG. 2B, a driving signal S is provided to the first pair of driving electrodes 151 at the same time. Next, as shown in FIG. 2C, a driving signal S is provided to the second pair of driving electrodes 151, and so on. According to this, after driving each pair of driving electrodes 151 (a total of n-1 pairs), one-dimensional sensing information corresponding to each pair of driving electrodes 151 can be obtained, so as to form an indented image relative to the foregoing complete image. The number of pixels in the inset image is less than the number of pixels in the full image. In another example of the present invention, the dual-electrode driving mode further includes single-electrode driving of the driving electrodes 151 on both sides, and when the single-driving electrode 151 on either side is driven, the signals of all detection electrodes 152 are detected to generate One-dimensional sensing information provides two additional one-dimensional sensing information to form an expanded image with the shrink image. For example, the one-dimensional sensing information corresponding to the two sides is placed outside the two sides of the internal shrink image to form an expanded image.

Ordinary persons having ordinary knowledge in the technical field can infer that the present invention may further include a three-electrode driving mode, a four-electrode driving mode, and the like, and details are not described herein again.

The foregoing driving potential may include, but is not limited to, at least two driving potentials, such as a low driving potential and a high driving potential. A higher driving potential has a higher signal-to-noise ratio.

According to the foregoing, in the single-electrode driving mode, a complete image can be obtained, and in the dual-electrode driving mode, an internally reduced image or an externally expanded image can be obtained. The complete image, the internal miniature image or the external expanded image can be obtained when the external conductive object 19 approaches or touches the front of the capacitive touch screen and the capacitive touch screen, so as to generate a change amount of each pixel to determine the position of the external conductive object 19. The external conductive objects 19 may be one or more. As also mentioned above, when the external conductive object 19 approaches or touches the capacitive touch screen, or is capacitively coupled with the driving electrode 151 and the detecting electrode 152, noise interference is caused, even when the driving electrode 151 is not driven, The external conductive object 19 may also be capacitively coupled with the driving electrode 151 and the detection electrode 152. In addition, noise may interfere from other channels.

Accordingly, in an example of the present invention, during the noise detection process, the driving switch 131 is turned off and the detection switch 132 is turned on. At this time, the measurement circuit may generate a signal based on the signal of the detection electrode 152. Noise detection is a one-dimensional sensing information to determine whether the noise interference is within the allowable range. For example, it can be to determine whether any value of the one-dimensional sensing information detected by noise exceeds a threshold value, or whether the sum or average of all values of the one-dimensional sensing information detected by noise exceeds a threshold. Limit to determine whether noise interference is within the allowable range. Those with ordinary knowledge in the technical field can infer other ways to determine whether the noise interference is within the allowable range by using the one-dimensional sensing information of the noise detection, which is not described in the present invention.

The noise detection process can be performed when the system is started or every time the aforementioned complete image, internal shrink image or external expansion image is obtained, or it can be obtained periodically or multiple times to obtain the aforementioned complete image, internal shrink image or external expansion image. It is carried out at any time, or when it is detected that an external conductive object is approaching or touching. Those skilled in the art can infer other suitable timings for performing noise detection procedures, and the present invention is not limited thereto.

The present invention further provides a frequency-changing program, which performs frequency switching when it is determined that the noise interference exceeds the allowable range. The measurement circuit is provided with multiple sets of frequency settings, which can be stored in a memory or other storage medium to provide the measurement circuit to be selected in the frequency change program and to control the clock signal of the clock circuit 11 according to the selected frequency. The frequency change procedure may be to select one appropriate frequency setting one by one in the frequency setting, for example, one of the frequency settings is selected one by one and a noise detection process is performed until the noise interference is detected to be within a tolerable range. The frequency change procedure may also be to select an optimal frequency setting one by one in the frequency setting. For example, the frequency setting is selected one by one and a noise detection process is performed to detect a frequency setting in which the noise interference is the smallest, such as a frequency setting in which the maximum value of the one-dimensional sensing information of the noise detection is the smallest. , Or the sum or average of all values of the one-dimensional sensing information of noise detection is the smallest frequency setting.

The frequency setting corresponds to, but is not limited to, a driving mode, a frequency, and a parameter group. The parameter group may include but is not limited to a group selected from the following sets: the aforementioned resistance parameter, the aforementioned gain parameter, the aforementioned phase parameter, and the aforementioned pulse width modulation parameter. A person of ordinary skill in the art with ordinary knowledge can infer that it is suitable for Related parameters of the capacitive touch screen and its control circuit.

The frequency setting may be as shown in the following list 1, including a plurality of driving potentials. The following takes the first driving potential and the second driving potential as examples. An ordinary person with ordinary knowledge in the technical field can infer that there may be more than three types of driving potentials. Potential. Each driving potential may have multiple driving modes, including, but not limited to, a group selected from the group consisting of a single electrode driving mode, a two electrode driving mode, a three electrode driving mode, a four electrode driving mode, and the like. Each driving mode corresponding to each driving potential has a plurality of frequencies, and each frequency corresponds to one of the aforementioned parameter groups. An ordinary person with ordinary knowledge in the technical field can infer that the frequency of each driving mode corresponding to each driving potential may be completely different or partly the same, which is not limited in the present invention.

Based on the above, the present invention provides a detection method for detecting a capacitive touch screen, please refer to FIG. 3A. First, as shown in step 310, a plurality of frequency settings are sequentially stored according to the power consumption, each frequency setting corresponds to a driving mode of a driving potential, and each frequency setting has a frequency and a parameter group, wherein the driving potential There is at least one. Next, as shown in step 320, the setting of the measurement circuit is initialized according to a parameter group of one of the frequency settings, and as shown in step 330, the measurement circuit detects the signal from the parameter group according to a parameter group of the measurement circuit. The signal of the detection electrode is used to generate one-dimensional sensing information according to the signal from the detection electrode. Next, as shown in step 340, it is determined whether the interference of a noise exceeds a permissible range according to the one-dimensional sensing information. Then, as shown in step 350, when the interference of the noise exceeds the allowable range, the operating frequency and the measurement circuit are changed in sequence according to a frequency and a parameter group of one of the frequency settings in order. After the setting, the one-dimensional sensing information is generated, and whether the interference of the noise exceeds the allowable range is determined according to the one-dimensional sensing information until the interference of the noise does not exceed the allowable range of the process. Alternatively, as shown in step 360 of FIG. 3B, when the interference of the noise exceeds the allowable range, the operating frequency and the setting of the measurement circuit are changed according to the frequency and parameter set of each frequency, respectively. The one-dimensional sensing information is generated, and the interference of the noise is judged according to the one-dimensional sensing information, and the working frequency is changed with a frequency and a parameter set of a frequency that is least affected by the noise interference. With the setting of the measuring circuit.

For example, as shown in FIG. 4, a detection device for detecting a capacitive touch screen according to the present invention includes a storage circuit 43, a driving circuit 41, and a detection circuit 42. As shown in the foregoing step 310, the storage circuit 43 includes a plurality of frequency settings 44, which are sequentially stored according to the power consumption. The storage circuit 43 may be a circuit, a memory, or any storage medium capable of storing electromagnetic records. In an example of the present invention, the frequency setting 44 may be configured by looking up a table. In addition, the frequency setting 44 may also store power consumption parameters.

The driving circuit 41 may be an integration of a plurality of circuits, including but not limited to the aforementioned clock circuit 11, pulse width modulation circuit 12, driving switch 131, detection switch 132, and driving selection circuit 141. The circuits listed in this example are for the convenience of the present invention. The driving circuit 41 may include only a part of the circuits or add more circuits, which is not limited in the present invention. The driving circuit is used to provide a driving signal to at least one driving electrode 151 of a capacitive touch screen according to an operating frequency. The capacitive touch screen includes a plurality of driving electrodes 151 and a plurality of detecting electrodes 152. The driving electrodes 151 It overlaps with the detection electrode 152 at a plurality of overlapping places.

The detection circuit 42 may be an integration of a plurality of circuits, including but not limited to the aforementioned measurement circuit 18, amplifying circuit 17, detection selection circuit 142, and may even include a variable electrical group 16. The circuits listed in this example are for the convenience of the present invention. The detection circuit 42 may include only a part of the circuits or add more circuits, which is not limited in the present invention. In addition, the detection circuit 42 further includes performing the foregoing steps 320 to 340 and performing step 350 or step 360. In the example of FIG. 3B, the frequency settings may be stored sequentially without depending on power consumption.

As described earlier, the one-dimensional sensing information used to determine whether the interference of the noise exceeds the allowable range is generated when the driving signal is not provided to the driving electrode. For example, when the drive selection circuit 131 is turned off and the detection selection circuit 132 is turned on.

In an example of the present invention, at least one driving potential has multiple driving modes. The driving modes include a single-electrode driving mode and a two-electrode driving mode. In the single-electrode driving mode, the driving signal only provides the driving at the same time. One of the electrodes, and in the two-electrode driving mode, the driving signal provides only one pair of the driving electrodes at the same time. The power consumption of the single-electrode driving mode is smaller than the power consumption of the two-electrode driving mode. In addition, in the single-electrode driving type, the detection circuit generates the one-dimensional sensing information when each driving electrode is provided with a driving signal to form a complete image, and wherein In the driving type, the detection circuit generates the one-dimensional sensing information when each pair of driving electrodes is provided with a driving signal to form an internal shrink image, wherein the pixels of the internal shrink image are smaller than the complete The pixels of the image. In addition, the detection circuit in the dual-electrode driving mode may further include driving both electrodes separately, and when a single driving electrode on either side is driven, the signals of all detection electrodes are detected to generate the one-dimensional sensing respectively. Information, in which two one-dimensional sensing information generated by driving the electrodes on both sides are placed outside the two sides of the internal shrink image to form an expanded image, and the pixels of the expanded image are larger than the The pixels of the full image.

In another example of the present invention, the driving potential includes a first driving potential and a second driving potential, and the single-electrode driving mode corresponding to the first driving potential generates power consumption of the complete image. Magnitude> power consumption of the two-electrode driving mode corresponding to the first driving potential to generate the internal image> power consumption of the single-electrode driving mode corresponding to the second driving potential to generate the complete image Electricity size.

In another example of the present invention, the driving potential includes a first driving potential and a second driving potential, and the single-electrode driving mode corresponding to the first driving potential generates power consumption of the complete image. The size> the power consumption of the single-electrode driving mode corresponding to the second driving potential to generate the complete image.

In addition, in an example of the present invention, the signal of each detection electrode is provided to the detection circuit through a variable resistor respectively, and the detection circuit is a parameter set based on one of the frequency settings. The impedance of the variable resistor is set. In addition, the signal of the detection electrode is detected after being amplified by at least one amplifying circuit, and the detecting circuit sets a gain of the amplifying circuit according to a parameter set of one of the frequency settings. Moreover, the driving signal is generated according to a parameter set of one of the frequency settings.

In an example of the present invention, each value of the one-dimensional sensing information is generated according to a signal of the detection electrode with a set period, wherein the set period is one of the frequency settings. Parameter group to set. In another example of the present invention, each value of the one-dimensional sensing information is generated according to the signal of the detection electrode with at least one set phase, wherein the set phase is based on the frequency. Set one of the parameter groups to set.

In addition, the driving circuit 41, the detection circuit 42, and the storage circuit 43 may be controlled by a control circuit 45. The control circuit 45 may be a programmable processor or other control circuits, and the present invention is not limited thereto.

Please refer to FIG. 5, which is a schematic diagram of a single-electrode driving mode according to the present invention. The driving signal S is sequentially provided to the first driving electrode, the second driving electrode ... until the last driving electrode, and one-dimensional sensing information of single-electrode driving is generated when each driving electrode is driven by the driving signal S. 52. A single-electrode driven one-dimensional sensing information 52 generated when each driving electrode is driven can be combined to form a complete image 51. Each value of the complete image 51 corresponds to a change in the capacitive coupling of one of the electrode intersections. .

In addition, each value of the complete image corresponds to the position of one of the overlaps, respectively. For example, the center position of each driving electrode corresponds to a first one-dimensional coordinate, and the center of each detection electrode corresponds to a second one-dimensional coordinate. The first one-dimensional coordinate may be one of a horizontal (or horizontal, X-axis) coordinate and a vertical (or vertical, Y-axis) coordinate, and the second one-dimensional coordinate may be a horizontal (or horizontal, X-axis) coordinate and a vertical (or Vertical, Y-axis) coordinates of the other. Each overlap corresponds to a two-dimensional coordinate of the driving electrode and the detection electrode overlapping the overlap. The two-dimensional coordinate is composed of the first one-dimensional coordinate and the second one-dimensional coordinate, such as (the first one Dimensional coordinate, second-dimensional coordinate) or (second-dimensional coordinate, first-dimensional coordinate). In other words, the one-dimensional sensing information driven by each single electrode respectively corresponds to the first one-dimensional coordinate of the center of one of the driving electrodes, where each value of the one-dimensional sensing information driven by a single electrode (or each value of the complete image) A value) corresponds to a two-dimensional coordinate formed by a first one-dimensional coordinate in the center of one of the driving electrodes and a second one-dimensional coordinate in the center of one of the detection electrodes. Similarly, each value of the complete image corresponds to the central position of one of the overlaps, that is, the first one-dimensional coordinates of the center of one of the driving electrodes and the center of one of the detection electrodes, respectively. A two-dimensional coordinate formed by the second-dimensional coordinate.

Please refer to FIG. 6, which is a schematic diagram of a two-electrode driving mode according to the present invention. The driving signal S is sequentially provided to the first pair of driving electrodes, the second pair of driving electrodes ... until the last pair of driving electrodes, and a one-dimensional sense of two-electrode driving is generated when each pair of driving electrodes is driven by the driving signal S.测 信息 62。 Test information 62. In other words, N driving electrodes may constitute N-1 pairs (multiple pairs) of driving electrodes. The one-dimensional sensing information 62 of the two-electrode driving generated when each pair of driving electrodes is driven is collected to form an internal image 61. The number of values (or pixels) of the indented image 61 is smaller than the number of values (or pixels) of the complete image 51. Relative to the complete image, the one-dimensional sensing information of each two-electrode driving of the indented image corresponds to the first one-dimensional coordinate of the central position between a pair of driving electrodes, and each value corresponds to the aforementioned one A two-dimensional coordinate formed by a central first-dimensional coordinate and a central second-dimensional coordinate of one of the detection electrodes. In other words, each value of the indented image corresponds to a center position between a pair of overlapping positions, that is, a first-dimensional coordinate corresponding to a center position between a pair of driving electrodes (or one of the plurality of driving electrodes), respectively. A two-dimensional coordinate formed with a second one-dimensional coordinate in the center of one of the detection electrodes.

Please refer to FIG. 7A, which is a schematic diagram of driving a single electrode on a first side in a two-electrode driving mode according to the present invention. The driving signal S is provided to the driving electrode closest to the first side of the capacitive touch screen, and when the driving electrode closest to the first side of the capacitive touch screen is driven by the driving signal S, one-dimensional driving first-dimensional sensing information is generated. 721. Please refer to FIG. 7B again, which is a schematic diagram of the second-side single-electrode driving in the two-electrode driving mode according to the present invention. The driving signal S is provided to the driving electrode closest to the second side of the capacitive touch screen, and when the driving electrode closest to the second side of the capacitive touch screen is driven by the driving signal S, one-dimensional driving second-dimensional sensing information is generated. 722. The one-dimensionally driven one-dimensional sensing information 721 and 722 generated when the driving electrodes on the first side and the second side are driven are placed outside the first side and the second side of the indented image 61 to form an expanded image. 71. The number of values (or pixels) of the expanded image 71 is greater than the number of values (or pixels) of the complete image 51. In an example of the present invention, first-dimensional one-dimensional sensing information 721 driven by a single electrode is first generated, then an indented image 61 is generated, and second-dimensional one-dimensional sensing information 722 driven by a single electrode is generated to constitute An expanded image 71. In another example of the present invention, an internally reduced image 61 is generated first, and then one-dimensionally driven first- and second-side one-dimensional sensing information 721 and 722 are generated to form an expanded image 71.

In other words, the expanded image is constituted by the first-side one-dimensional sensing information driven by a single electrode, the internally reduced image, and the second-side one-dimensional sensing information driven by a single electrode. Since the value of the indented image 61 is driven by two electrodes, the average size is larger than the average value of the values of the one-dimensional images of the first and second sides driven by a single electrode. In an example of the present invention, the values of the one-dimensional sensing information 721 and 722 of the first side and the second side are placed on the outer side of the first side and the second side of the inward image 61 after being enlarged by a ratio. The ratio may be a preset multiple, the preset multiple is greater than 1, or may be generated based on a ratio between the value of the one-dimensional sensing information driven by the two electrodes and the value of the one-dimensional sensing information driven by the single electrodes. For example, the ratio of the sum (or average) of all the values of the one-dimensional sensing information 721 on the first side to the sum (or average) of all the values of the one-dimensional sensing information 62 adjacent to the first side in the reduced image. The value of the dimensional sensing information 721 is placed outside the first side of the inner image 61 after being enlarged by this ratio. Similarly, it is the ratio of the sum (or average) of all the values of the one-dimensional sensing information 722 on the second side to the sum (or average) of all the values of the one-dimensional sensing information 62 adjacent to the second side in the shrink image. The value of the side one-dimensional sensing information 722 is placed outside the second side of the inner image 61 after being enlarged by this ratio. For another example, the foregoing ratio may be a ratio of a sum (or average) of all values of the internal image 61 to a sum (or average) of all values of the one-dimensional sensing information 721 and 722 on the first side and the second side.

In the single-electrode driving mode, each value (or pixel) of the complete image corresponds to the two-dimensional position (or coordinates) of an overlap, which is the first one-dimensional position corresponding to the driving electrodes that overlap. (Or coordinates) the second-dimensional position (or coordinates) corresponding to the detection electrode, such as (first-dimensional position, second-dimensional position) or (second-dimensional position, first-dimensional position) . A single external conductive object may be capacitively coupled with one or more overlaps, and the capacitive coupling with external conductive objects will produce a change in capacitive coupling, which is reflected in the corresponding value in the complete image, that is, externally The conductive objects correspond to the corresponding values in the complete image. Therefore, the position of the center of mass (two-dimensional coordinate) of the external conductive object can be calculated according to the corresponding value and the two-dimensional coordinate of the external conductive object in the complete image.

According to an example of the present invention, in the single-electrode driving mode, the one-dimensional position corresponding to each electrode (the driving electrode and the detection electrode) is the position of the center of the electrode. According to another example of the present invention, in the two-electrode driving mode, the corresponding one-dimensional position of each pair of electrodes (driving electrode and detecting electrode) is the position of the center between the two electrodes.

In the reduced image, the first one-dimensional sensing information corresponds to the center position of the first pair of driving electrodes, that is, the first one-dimensional position in the center between the first and second driving electrodes (first pair of driving electrodes). . If the position of the center of mass is simply calculated, the position between the center of the first pair of driving electrodes and the center of the last pair of driving electrodes can only be calculated. The range of the position calculated based on the reduced image lacks the center position of the first pair of driving electrodes ( The range between the center position of the first dimension) and the center position of the first drive electrode and the range between the center position of the last pair of drive electrodes and the center position of the last drive electrode.

Relative to the internal image, in the external image, the one-dimensional and second-dimensional sensing information correspond to the positions of the center of the first and last drive electrodes, respectively. Therefore, the range ratio of the positions calculated based on the external image The range of positions calculated based on the reduced image increases the range between the center position of the first pair of driving electrodes (the center of the first dimension) and the center position of the first driving electrode, and the center position of the last pair of driving electrodes and the last The range between the center positions of the drive electrodes. In other words, the range of positions calculated from the expanded image includes the range of positions calculated from the full image.

Similarly, the foregoing two-electrode driving mode can be expanded into a multi-electrode driving mode, that is, driving multiple driving electrodes at the same time. In other words, the driving signal is provided to a plurality of (all) driving electrodes in a group of driving electrodes at the same time, for example, the number of driving electrodes of a group of driving electrodes is two, three, or four. The multi-electrode driving mode includes the aforementioned two-electrode driving mode, and does not include the aforementioned single-electrode driving mode.

Please refer to FIG. 8, which is a detection method for detecting a capacitive touch screen according to the present invention. As shown in step 810, a capacitive touch screen having a plurality of driving electrodes and a plurality of detecting electrodes arranged in parallel in order is provided, wherein the driving electrodes and the detecting electrodes overlap at a plurality of overlapping positions. For example, the aforementioned driving electrodes 151 and detection electrodes 152. Next, as shown in step 820, a driving signal is provided to one of the driving electrodes and one of the driving electrodes in a single-electrode driving mode and a multi-electrode driving mode, respectively. That is, in a unipolar driving mode, the driving signal is provided to only one of the driving electrodes at a time, and in a multi-electrode driving mode, the driving signal is a group of driving electrodes that are simultaneously provided at a time. The driving electrodes, in addition to the last N driving electrodes, each driving electrode and two driving electrodes adjacent to each other constitute a group of driving electrodes that are driven simultaneously, and N is the number of driving electrodes of a group of driving electrodes minus one. The driving signal may be provided by the aforementioned driving circuit 41. Next, as shown in step 830, each time the driving signal is provided, one-dimensional sensing information is obtained by the detection electrode to obtain one-dimensional sensing of multiple multi-electrode driving in a multi-electrode driving mode. The information and one-dimensional sensing information of the first-side and second-side single-electrode driving are obtained in the single-electrode driving mode. For example, in the multi-electrode driving mode, one-dimensional sensing information of multi-electrode driving is obtained when a driving signal is provided for each group of driving electrodes. For another example, in the single-electrode driving mode, one-dimensional sensing information of a first-side single-electrode drive and one of a second-side single-electrode drive are respectively obtained when the first driving electrode and the last driving electrode provide driving signals. Dimensional sensing information. The acquisition of the one-dimensional sensing information may be obtained by the detection circuit 42 described above. The one-dimensional sensing information includes the one-dimensional sensing information (internal image) driven by the multi-electrode and one-dimensional sensing information driven by a single electrode on the first and second sides. Then, as shown in step 840, the one-dimensional sensing information driven by the first single-electrode side, the one-dimensional sensing information driven by all the multi-electrodes, and the one-dimensional sensing information driven by the second-side single electrode are sequentially performed. Generate an image (external image). Step 840 may be completed by the aforementioned control circuit.

As described earlier, the potential of the driving signal in the single-electrode driving mode and the potential of the driving signal in the multi-electrode driving mode are not necessarily the same, and may be the same or different. For example, the single-electrode drive is driven by a larger first AC potential, and the ratio of the first AC potential to the second AC potential is a preset ratio relative to the second AC potential driven by the multiple electrodes. In addition, step 840 is to generate the image according to all values of the one-dimensional sensing information driven by the first electrode and the second electrode are multiplied by a same or different preset ratio, respectively. In addition, the frequency of the driving signal in the single-electrode driving mode is different from the frequency of the driving signal in the multi-electrode driving mode.

The number of driving electrodes of a group of driving electrodes may be two, three, or even more, which is not limited in the present invention. In a preferred mode of the present invention, the number of driving electrodes of one set of driving electrodes is two. When the number of driving electrodes of a group of driving electrodes is two, each driving electrode corresponds to a first-dimensional coordinate, and one-dimensional sensing information driven by each multi (dual) electrode corresponds to one of the driving electrodes. The first one-dimensional coordinates of the center between the driving electrodes, and the one-dimensional sensing information driven by the single electrode on the first and second sides respectively correspond to the first one-dimensional coordinates of the first and last driving electrodes.

Similarly, when the number of driving electrodes of a set of driving electrodes is multiple (more than two), each driving electrode corresponds to a first-dimensional coordinate, and the one-dimensional sensing information of each multi-electrode driving corresponds to The first one-dimensional coordinate in the center between the two farthest driving electrodes in a group of the driving electrodes of the driving electrode, and the one-dimensional sensing information of the single electrode driving on the first side and the second side respectively corresponds to the first one Coordinate with the first one dimension of the last driving electrode.

In addition, each detection electrode corresponds to a second one-dimensional coordinate, and each value of each one-dimensional sensing information corresponds to a second one-dimensional coordinate of one of the detection electrodes, respectively.

Please refer to FIG. 9A and FIG. 9B, which are schematic diagrams for detecting that a conductive strip receives a capacitive coupling signal by driving the conductive strip. Because the signal passes through some load circuits, such as through capacitive coupling, a phase difference will occur between the signal received by the detection conductive strip and the signal before it is provided to drive the conductive strip. For example, when the driving signal is provided to the first driving conductive strip, the signal received by the first detecting conductive strip and the signal before the driving conductive strip will generate a first phase difference ψ 1, as shown in FIG. 9A, and the driving When the signal is provided to the second driving conductive strip, the signal received by the first detecting conductive strip and the signal before the driving conductive strip generates a second phase difference ψ 2, as shown in FIG. 9B.

The first phase difference ψ 1 and the second phase difference ψ 2 are different according to the resistance-capacitance circuit (RC circuit) through which the driving signal passes. When the periods of the driving signals are the same, different phase differences indicate that the signals are received at different time delays. If the signal is ignored and the signal is detected directly, the starting phase of the signal measurement will be different and different results will be produced. For example, suppose the phase difference is 0, the signal is a sine wave, and the amplitude is A. When the phase detection signals are 30 degrees, 90 degrees, 150 degrees, 210 degrees, 270 degrees, and 330 degrees, | 1 / 2A |, | A |, | 1 / 2A |, | -1 / 2A will be obtained, respectively. |, | -A | and | -1 / 2A |. However, when the phase difference is 150 degrees, the phase that starts to be measured will cause a deviation, so that when the phase is 180 degrees, 240 degrees, 300 degrees, 360 degrees, 420 degrees, and 480 degrees, the detection signals will get 0, , , 0, versus signal of.

From the foregoing example, it can be seen that the delay of the starting phase of the measurement caused by the aforementioned phase difference will make the signal measurement result completely different. Whether the driving signal is a sine wave or a square wave (such as PWM), there will be similar The difference exists.

In addition, each time a driving signal is provided, it may be provided to a plurality of adjacent driving conductive strips, wherein the driving conductive strips are arranged in parallel in order. In the preferred example of the invention, it is provided to two adjacent driving conductive strips, so in one scan, n driving conductive strips are provided with a total of n-1 driving signals, each time being provided to a group of driving conductive strips. For example, the first and second driving conductive bars are provided for the first time, the second and third driving conductive bars are provided for the second time, and so on. As mentioned previously, each time a driving signal is provided, the set of driving conductive bars provided may be one, two or more, and the present invention does not limit the number of driving conductive bars provided by each driving signal. Each time the drive signal is provided, all the signals measured by the conductive strips can be combined into one-dimensional sensing information, and all the one-dimensional sensing information in one scan can be combined to form two-dimensional sensing information, which can be regarded as one image.

Accordingly, in a first embodiment of the best mode of the present invention, different phase differences are used for different conductive bars to delay the detection signal. For example, first determine multiple phase differences. When each group of driving conductive bars is provided with a driving signal, the signal is measured according to each phase difference. The phase difference on which the largest of the measured signals is based is the closest. The phase difference between the signal provided before driving the conductive strip and the signal received after detecting the conductive strip is referred to as the most approaching phase difference in the following description. The measurement of the signal may be to select one of the detection conductive strips to perform measurement according to each phase difference, or to select multiple or all detection conductive strips to perform measurement according to each aberration, based on multiple or all The sum of the signals of the conductive bars is detected to determine the closest phase difference. Based on the above, the closest phase difference of each group of conductive strips can be determined. In other words, when each group of conductive strips is provided with a driving signal, all detected conductive strips are delayed after the closest phase difference of the driving signal is provided. Take measurements.

In addition, it is not necessary to measure the signals based on all the aberrations, and it is possible to measure the signals according to one phase difference among the phase differences (s) in sequence, until it is found that the measured signals increase and then decrease. Stop, where the phase difference on which the largest of the measured signals is based is the closest approaching phase difference. In this way, an image with a larger signal can be obtained.

In addition, it is also possible to first select a group of the driving conductive strips as the reference conductive strips, and other conductive strips are called non-reference conductive strips, and first detect the closest phase difference of the reference conductive strips as a level phase. Then, the phase difference of the non-reference driving conductive strip that is closest to the leveling phase difference is called the most leveling phase difference. For example, a signal measured based on the level difference of a reference conductive strip is used as a level signal, and a signal measurement is performed on each phase difference of each group of non-reference driving conductive strips. The phase difference on which the leveling signal is advanced is used as the leveling phase difference of the driving conductive strip to which the driving signal is supplied. In this way, the leveling phase difference of each group of driving conductive strips can be determined, and the measurement of the delayed signal can be obtained according to the leveling phase difference of each group of driving conductive strips, and a more leveled image, that is, the difference between the signals in the image can be obtained Very small. In addition, the leveling signal may fall within a preset working range, and does not necessarily need to be the optimal maximum signal.

In the foregoing description, every time a driving signal is provided, the same phase difference is used for all the detected conductive strips. Those skilled in the art can infer, or every time a driving signal is provided, One set of detection conductive bars adopts the respective closest approach phase difference or level phase difference. In other words, each time a drive signal is provided, each phase difference of each set of detection conductive strips is measured to determine the closest approach phase difference or level phase difference.

In fact, in addition to using aberration to delay the measurement to obtain a larger or more accurate image, it is also possible to obtain a more accurate image with different magnification, impedance, and measurement time.

Accordingly, the present invention proposes a signal measurement method for a touch screen, as shown in FIG. 10. As shown in step 1010, a touch screen is provided. The touch screen includes a plurality of conductive bars composed of a plurality of driving conductive bars arranged in parallel and a plurality of detecting conductive bars arranged in parallel. The bars overlap in multiple overlapping areas. In addition, as shown in step 1020, a delay phase difference is determined for each or each group of driving conductive bars. Thereafter, as shown in step 1030, a driving signal is sequentially provided to one or a group of the driving conductive strips, and the driving conductive strip provided with the driving signal and the detection conductive strip generate mutual capacitive coupling. Next, as shown in step 1040, each time the driving signal is provided, the signal of each detection combination of the provided driving signal is delayed after the corresponding phase difference is measured.

Accordingly, in the signal measurement device of the touch screen of the present invention, the aforementioned step 1030 may be implemented by the aforementioned driving circuit 41. In addition, step 1040 may be implemented by the aforementioned detection circuit 42.

In an example of the present invention, the delay phase difference of each or each group of driving conductive bars is selected from a plurality of predetermined phase differences, such as the aforementioned closest approaching phase difference. Each group of conductive bars refers to a group of multiple conductive bars that are simultaneously provided with a driving signal during multiple driving, and is implemented by the aforementioned drive selection circuit 141 of the drive circuit 41, for example. For example, one or a group of conductive strips of the driving conductive strips are sequentially selected as the selected conductive strip, as implemented by the driving circuit 41. Next, the retardation phase difference of the selected conductive strip is selected from a plurality of predetermined phase differences. Wherein, when the driving signal is provided to the selected conductive strip, the signal measured after delaying the delay phase difference is greater than the signal detected after delaying other predetermined phase differences. For example, it is implemented by the aforementioned detection circuit 42, and the detected delay phase difference can be stored in the storage circuit 43.

Alternatively, the above-mentioned leveling phase difference may be selected. For example, one or a group of conductive bars of the driving conductive bar is selected as the reference conductive bar, and the other bar or other group of conductive bars is used as the non-reference conductive bar, as implemented by the driving circuit 41. After that, the delay phase difference of the reference conductive strip is selected from a plurality of predetermined phase differences. When the driving signal is provided to the reference conductive strip, a signal detected after delaying the delay phase difference is greater than that after delaying other predetermined phase differences. Detected signal. Wherein, the retardation phase difference of the reference conductive strip is the aforementioned parallel phase difference. Next, a signal detected after the reference conductive strip is delayed by the delayed phase difference is used as a reference signal, and then one or a group of non-reference conductive strips of the non-reference conductive strip is sequentially selected as the selected conductive strip, and The delay phase difference of the selected conductive strip is selected from a plurality of predetermined phase differences, such as the aforementioned most level phase difference, wherein when the driving signal is provided to the selected conductive strip, the detected delay phase difference is delayed. The signal is closest to the reference signal compared to the signal detected after delaying other predetermined phase differences. The above can be implemented by the detection circuit 42.

In an example of the present invention, when the driving signal is provided to the reference conductive bar or the selected conductive bar, the signals measured by the plurality of detected conductive bars are performed by the detected conductive bars. One of the measured signals. In other words, the delay phase difference is selected based on the signal of the same detection conductive strip. In another example of the present invention, when the driving signal is provided to the reference conductive bar or the selected conductive bar, the signals measured by the plurality of detected conductive bars are performed by the detected conductive bars. The sum of the signals measured by at least two of the bars. In other words, the delay phase difference is selected based on the sum of the signals of the same plurality of detection conductive bars or all the detection conductive bars.

As mentioned earlier, the overlapping area of each of the driven conductive strips and each of the detected conductive strips may have a corresponding retardation phase difference. In the following description, each or each group of driving conductive bars and each overlapping or detecting group of conductive bars are used as a detection combination. In other words, the driving signal may be provided to one or more driving conductive bars at the same time, and the signal may also be measured by one or more detecting conductive bars. When a signal is generated by measurement, one or more driving conductive bars provided with the driving signal and one or more detecting conductive bars to be measured are referred to as a detection combination. For example, when a single drive or multiple drives are used, one conductive bar detects the signal value, or two conductive bars measure a difference, or three conductive bars measure a double difference. Where the difference is the difference between the signals of the two adjacent conductive strips, and the double difference is the difference between the signals of the first two conductive strips and the difference between the signals of the two conductive strips among the three adjacent conductive strips. difference.

Accordingly, in another example of the present invention, a signal measurement method for a touch screen is shown in FIG. 11. As shown in step 1110, a touch screen is provided. The touch screen includes a plurality of conductive bars composed of a plurality of driving conductive bars arranged in parallel and a plurality of detecting conductive bars arranged in parallel. The bars overlap in multiple overlapping regions. In addition, as shown in step 1120, each or each group of driving conductive strips is overlapped with each or each group of detection conductive strips as a detection combination, and as shown in step 1130, each detection is determined. A combined delay phase difference. After that, as shown in step 1140, a driving signal is sequentially provided to one or a group of the driving conductive strips, and the driving conductive strip provided with the driving signal and the overlapping detection are provided in the detection combination provided with the driving signal. The measurement of the conductive strip produces mutual capacitive coupling. Next, as shown in step 1150, each time a driving signal is provided, the signal of each detection combination of the provided driving signal is delayed after a corresponding phase difference is measured.

Accordingly, in a signal measurement device of the present invention, step 1140 may be implemented by the aforementioned driving circuit 41, and step 1150 may be implemented by the aforementioned detection circuit 42.

In an example of the present invention, step 1130 may include: sequentially selecting one of the detection combinations as the selected detection combination, which may be implemented by the aforementioned driving circuit 41; and by a plurality of predetermined phase differences. The delay phase difference of the selected detection combination is selected, wherein when the driving signal is provided to the selected detection combination, the signal measured after delaying the delay phase difference is greater than the signal detected after delaying other predetermined phase differences. , May be implemented by the aforementioned detection circuit 42.

In another example of the present invention, determining the delay phase difference of each detection combination can also be implemented as described below. One of the detection combinations is selected as the reference detection combination, the other detection combinations are selected as the non-reference detection combination, and one of the non-reference detection combinations is sequentially selected as the selected detection combination. The aforementioned driving circuit 41 is implemented. In addition, the delay phase difference of the reference detection combination is selected from a plurality of predetermined phase differences. When the driving signal is provided to the reference detection combination, the signal detected after delaying the delay phase difference is greater than delaying other predetermined phases. A signal detected after the difference, and the signal detected after the delay phase difference is delayed by using the reference detection combination as a reference signal. In addition, the delay phase difference of the selected detection combination is selected from a plurality of predetermined phase differences. When the driving signal is provided to the selected detection combination, the signal detected after delaying the delay phase difference is compared to The signal detected after delaying other predetermined phase differences is closest to the reference signal. The above can be implemented by the aforementioned detection circuit 42.

In a second embodiment of the present invention, the signals are measured by a control circuit, and the signals of each group of conductive strips are measured by a variable resistor respectively. The control circuit is driven according to each group. The conductive strip determines the resistance of the variable resistor. For example, a group of the driving conductive strips is first selected as a reference conductive strip, and the other conductive strips are referred to as non-reference conductive strips. First set multiple preset impedances, and detect a signal that detects a conductive strip when a reference conductive strip (may be one or more) is provided with a drive signal, or detect a signal that detects multiple or all conductive strips. Add up as a leveling signal. In addition, the leveling signal may fall within a preset working range, and does not necessarily need to be an optimal or maximum signal. In other words, any preset impedance that allows the leveling signal to fall within a preset working range can be used as the leveling impedance of the reference conductive strip. Next, when each group of non-reference conductive bars is provided with a driving signal value, the variable resistance is adjusted according to each preset impedance, and the signal of the detecting conductive bar is detected, or the multiple or all detecting bars are detected. The sum of the signals of the conductive strips is measured to compare the preset impedance of the most received level signal as the level impedance with respect to the set of non-reference conductive strips to which the driving signal is provided. In this way, the leveling impedance of each group of driving conductive strips can be determined, and the impedance of the variable resistor can be adjusted (adjusting the variable resistance to the leveling impedance) according to the leveling impedance of each group of driving conductive strips. The difference between the signals in the image is small.

In the foregoing description, every time a drive signal is provided, all detection conductive strips are used with the same level impedance. Those skilled in the art can infer that the same level of impedance can be inferred. A set of detection conductive strips adopt their respective level impedances. In other words, each time a drive signal is provided, each of the preset impedances of each group of conductive strips is measured for the signal to determine the predicted impedance that is closest to the level signal, and each When a set of driving conductive strips is provided with a driving signal, the leveling impedance of each detecting conductive strip is adjusted to adjust the impedance of the variable resistor electrically coupled to each detecting conductive strip.

In addition to the aforementioned control circuit may be composed of electronic components, it may also be composed of one or more ICs. In an example of the present invention, the variable resistor may be built in the IC, and the resistance of the variable resistor may be controlled by a programmable program (such as firmware in the IC). For example, the variable resistor is composed of multiple resistors and controlled by multiple switches. The impedance of the variable resistor is adjusted by the on and off of different switches. Since variable resistors and programmable programs are well-known techniques , Will not repeat them here. The variable resistor in the IC can be controlled by a programmable program and can be applied to the touch panel with different characteristics by way of body modification, which can effectively reduce the cost and achieve the purpose of commercial mass production.

In a third embodiment of the present invention, the signal is measured by a control circuit, and the signals of each group of conductive bars are measured by a detection circuit (such as an integrator). The control circuit is based on Each set of driving conductive strips determines the magnification of the detection circuit. For example, a group of the driving conductive strips is first selected as a reference conductive strip, and the other conductive strips are referred to as non-reference conductive strips. First set multiple preset magnifications, and detect a signal that detects a conductive strip when a reference conductive strip (may be one or more) is provided with a drive signal, or detect a signal that detects multiple or all conductive strips Sum as a leveling signal. In addition, the leveling signal may fall within a preset working range, and does not necessarily need to be an optimal or maximum signal. In other words, any preset magnification that can cause the leveling signal to fall within a preset working range can be used as the level magnification of the reference conductive strip. Next, when each group of non-reference conductive bars is provided with a driving signal value, the detection circuit is adjusted according to each preset magnification, and the signal of the detection conductive bar is detected, or the multiple or all of them are detected. The sum of the signals of the conductive strips is detected to compare the preset magnification of the most received level signal as the level magnification relative to the set of non-reference conductive strips to which the drive signal is provided. In this way, the level magnification of each group of driving conductive strips can be determined, and the magnification of the detection circuit can be adjusted according to the level magnification of each group of driving conductive strips. A more level image can be obtained, that is, between the signals in the image. The difference is small.

In the foregoing description, every time a driving signal is provided, the same level magnification is adopted for all the detected conductive strips. Those skilled in the art can infer that, or every time a driving signal is provided, Each set of detection conductive bars adopts its own level magnification. In other words, each time a drive signal is provided, the signal is measured for each preset magnification of each group of detected conductive strips to determine the predicted magnification that is closest to the level signal. Obtain the horizontal magnification of each detected conductive strip when each group of conductive strips is provided with a driving signal.

In a fourth embodiment of the present invention, the signals are measured by a control circuit, and the signals of each group of conductive bars are measured by a detection circuit (such as an integrator). The control circuit is based on Each set of driving conductive bars determines the measurement time of the detection circuit. For example, a group of the driving conductive strips is first selected as a reference conductive strip, and the other conductive strips are referred to as non-reference conductive strips. First set multiple preset measurement times, and detect a signal that detects a conductive strip when a reference conductive strip (may be one or more) is provided with a drive signal, or detect multiple or all detected conductive strips. The sum of the signals is used as a level signal. In addition, the leveling signal may fall within a preset working range, and does not necessarily need to be an optimal or maximum signal. In other words, any preset measurement time that allows the leveling signal to fall within a preset working range can be used as the level measurement time of the reference conductive strip. Next, when the driving signal value is provided for each group of non-reference conductive bars, the detection circuit is adjusted according to each preset measurement time, and the signal of the detected conductive bar is detected, or the multiple or The sum of the signals of all the detected conductive strips is used to compare the preset measurement time of the most received leveling signal as the level measurement time relative to the set of non-reference conductive strips that are provided with the drive signal. In this way, the level measurement time of each group of driving conductive strips can be determined, and the measurement time of the detection circuit can be adjusted according to the level measurement time of each group of driving conductive strips. A more level image, that is, the The difference between the signals is small.

In the foregoing description, each time a drive signal is provided, the same level measurement time is used for all the detected conductive strips. Those skilled in the art can infer, or it can also be used every time a drive signal is provided. Each set of detection conductive strips adopts its own level measurement time. In other words, each time a drive signal is provided, the signal measurement is performed for each preset measurement time of each group of detection conductive bars to determine the predicted measurement time that is closest to the level signal. This obtains the level measurement time of each detected conductive strip when a driving signal is provided for each group of driving conductive strips.

In the foregoing description, one of the first embodiment, the second embodiment, the third embodiment, and the fourth embodiment may be selected from one type or a mixture of multiple types, and the present invention is not limited thereto. In addition, when measuring the leveling signal, one or more detection conductive bars farthest from the detection circuit may be selected to detect the signal to generate a leveling signal. For example, the signal of the furthest detected conductive strip can be used to generate the leveling signal, or the differential signal of the furthest detected conductive strips can be used to generate the leveled signal (difference value). The difference between the first two and the last two of the conductive strips is detected to generate a leveling signal (double difference). In other words, the leveling signal may be a signal value, a difference value, or a double difference value, or may be another value generated based on one or more signals detecting the conductive bars.

Please refer to FIG. 12, which is a signal measurement method of a touch screen according to the present invention. As shown in step 1210, a touch screen is provided. The touch screen includes a plurality of conductive bars composed of a plurality of driving conductive bars arranged in parallel and a plurality of detecting conductive bars arranged in parallel. The bars overlap in multiple overlapping areas. In addition, as shown in step 1220, one or a group of driving conductive strips of the driving conductive strips are selected as the reference conductive strips, and other driving strips or other groups of driving conductive strips are selected as the non-reference conductive strips. The reference conductive strip may be the first strip or the first set of driving strips, or may be a driving strip at other positions, which is not limited in the present invention. Next, as shown in step 1230, a driving signal is provided to the reference conductive strip, and the signal of the at least one detected conductive strip is detected according to one of the parameter groups. And, as shown in step 1240, when the signal of the at least one detected conductive strip is not within a preset signal range, the at least one detected conductive strip is sequentially detected according to one of the other parameter groups. Until the signal of the at least one detected conductive bar falls within a preset signal range. In addition, as shown in step 1250, at least one signal that detects that the conductive bar falls within a preset signal range when the reference conductive bar is provided with a driving signal is used as a leveling signal, and the parameter group based on the reference conductive bar is used as The initial parameter set of the reference conductive strip. Next, as shown in step 1260, driving signals are sequentially provided to each or each group of non-reference conductive strips in sequence, and, as shown in step 1270, driving is provided in each or each group of non-reference conductive strips. In the case of signals, the signals of the at least one detection conductive strip are respectively detected according to the parameter group one in order. Then, as shown in step 1280, the initial parameter group of each non-reference conductive strip is determined, and the driving signal value is provided in each or each non-reference conductive strip, and the detection is performed according to the initial parameter group. The signal of the at least one detected conductive strip is closer to the level signal than the signal of the at least one detected conductive strip detected according to other parameter groups.

According to the first, second, third, and fourth embodiments described previously, the parameter group may be used to change the delay phase difference, the resistance of the variable resistor, the magnification of the detection circuit, and the amount of the detection circuit. Measure time. In a first example of the present invention, the driving signal passes through a variable resistor to the at least one detection conductive strip, wherein the resistance of the variable resistor is based on the initial parameters of the conductive strip provided with the driving signal. change. In a second example of the present invention, the time of detecting the signal is changed according to the initial parameters of the conductive strip to which the driving signal is provided. In a third example of the present invention, the driving signal is provided to the at least one detection conductive strip after being amplified by an amplifier, wherein the magnification of the amplification circuit is changed according to the initial parameters of the conductive strip provided with the driving signal. . In addition, in a fourth example of the present invention, the signal of the at least one detection conductive strip is detected after a delay phase difference, wherein the delay phase difference is based on the initial of the conductive strip provided with the driving signal. Parameters to change.

Accordingly, referring to FIG. 4, a signal measurement of a touch screen according to the present invention includes a touch screen, a driving circuit 41, a detection circuit 42, and a control circuit 45. The touch screen includes a plurality of conductive bars composed of a plurality of driving conductive bars 151 arranged in parallel and a plurality of detecting conductive bars 152 arranged in parallel. The driving conductive bars 151 and the detection conductive bars 152 overlap with each other. Overlapping area. The driving circuit 41 provides a driving signal to one or a set of driving conductive strips 151, wherein one or a set of driving conductive strips 151 of the driving conductive strips 151 is a reference conductive strip, and the other strips or other groups of driving conductive strips 151 are Non-reference conductive strip. Each time the detection signal is provided, the detection circuit 42 generates an evaluation signal of the driving conductive strip 151 provided with the driving signal from the signal of the at least one detecting conductive strip 152 according to one of the plurality of parameter groups. The control circuit 45 selects a set of initial parameter sets as the reference conductive strip from the parameter set, uses an evaluation signal generated by the detection circuit according to the initial parameter set as a leveling signal, and selects each parameter set from the parameter set. The initial parameter group of one or each non-reference conductive strip, wherein the evaluation signal generated by each or each non-reference conductive strip based on the initial parameter group is closer to the leveling signal than the evaluation signals generated by other parameter groups. In addition, the parameter set may be stored in the storage circuit 43.

The evaluation signal may be generated based on one or more signals detecting the conductive bars. For example, the evaluation signal is generated by one of the detection conductive bars. For another example, the evaluation signal is generated by adding up the signals of at least two of the detection conductive bars.

In addition, in an example of the present invention, the controller may generate an evaluation signal of the reference conductive strip by the detection circuit according to one of the parameter groups in sequence, and use the largest evaluation signal of the reference conductive strip generated. The parameter group based on is used as the initial parameter group of the reference conductive strip. In another example of the present invention, the controller may sequentially generate the evaluation signals of the reference conductive strips by the detection circuit according to one of the parameter groups in sequence, and evaluate the first conductive strips that meet a condition according to the evaluation. The parameter group on which the signal is based is used as the initial parameter group of the reference conductive strip.

According to the first, second, third, and fourth embodiments described previously, the parameter group may be used to change the delay phase difference, the resistance of the variable resistor, the magnification of the detection circuit, and the amount of the detection circuit. Measure time. In a first example of the present invention, the driving signal is passed through a variable resistor to the at least one detection conductive strip, wherein the detection circuit changes the variable resistance according to an initial parameter of the conductive strip provided with the driving signal. Resistance value. In a second example of the present invention, the detection circuit changes the time of the detection signal according to the initial parameters of the conductive strip to which the driving signal is provided. In a third example of the present invention, the driving signal is provided to the at least one detection conductive strip after being amplified by an amplifier, wherein the detection circuit changes the amplification circuit according to the initial parameters of the conductive strip provided with the driving signal. Magnification. In addition, in a fourth example of the present invention, the detection circuit starts to measure the signal of the at least one detection conductive strip after a delay phase difference, wherein the detection circuit is based on the conduction of the driving signal provided. Strip the initial parameters to change the delay phase difference.

Please refer to FIG. 13, which illustrates a touch system 1300 according to an embodiment of the present invention. The touch system 1300 includes a touch screen or a touch panel 1310 and a detection device 1320 connected to the touch screen 1310. The touch screen includes a plurality of driving conductive strips 1311 and a plurality of detecting conductive strips 1312. The detection device 1320 includes at least one driving circuit 1330, at least one detection circuit 1340, and a control module 1350. The driving circuit 1330 is configured to be connected to the driving conductive strip 1311. The detection circuit 1340 is configured to be connected to the detection conductive strip 1312.

The driving circuit 1330 is used to provide a driving signal to one or a group of driving conductive strips 1311 of the touch screen 1310. One or a set of driving conductive bars 1311 is designated as a reference conductive bar. The remaining driving conductive strips 1311 are designated as non-reference conductive strips. Each time the driving signal is provided, the detection circuit 1340 is configured to generate an evaluation signal from at least one detection conductive strip 1312 according to a parameter of a plurality of parameter sets corresponding to the driving conductive strip 1311 provided with the driving signal. The control module 1350 is configured to select a parameter set from the multiple parameter sets of the reference conductive strip as an initial parameter set, and then specify the evaluation signal generated by the detection circuit 1340 according to the initial parameter set as A level signal. The initial parameters of each or each non-reference conductive strip are selected from the multiple parameter sets. Compared with other evaluation signals generated according to the parameters of other parameter sets, the evaluation signals generated according to the initial parameters of each or each group of non-reference conductive bars are closest to the leveling signal.

In an embodiment, the control module 1350 controls the detection circuit 1340 to sequentially generate the evaluation signal of the reference conductive strip according to each parameter of the parameter set, wherein a parameter of the maximum evaluation signal of the reference conductive strip is generated. The set is designated as the initial parameter set of the reference conductive strip.

In one embodiment, the evaluation signal is from one of the plurality of detection conductive strips 1312. In another embodiment, the evaluation signal is a sum of signals from at least two of the plurality of detection conductive strips 1312.

In one embodiment, the detection circuit 1340 changes the detection time length according to a corresponding initial parameter of the driving conductive strip 1311 that sends a driving signal.

In one embodiment, the driving signal is amplified by a signal amplifier and provided to at least one driving conductive strip 1311. The driving circuit 1330 changes an amplification factor of the signal amplifier according to a corresponding initial parameter of the driving conductive strip 1311 that sends out a driving signal.

In one embodiment, the detection circuit 1340 measures a signal of the at least one detection conductive strip 1312 after a delay phase difference. The detection circuit 1340 changes the delay phase difference according to a corresponding initial parameter of the driving conductive strip 1311 that sends out a driving signal.

Please refer to FIG. 14, which is a schematic flowchart of a touch detection method according to an embodiment of the present invention. This flow diagram can be implemented by the detection device 1320 shown in FIG. 13. The flowchart can include the following steps:

Step 1410: Specify one or a group of driving conductive bars of a touch screen as the reference conductive bar, and designate other bars or other groups of driving conductive bars as the non-reference conductive bars.

Step 1420: Provide a driving signal to the reference conductive strip, and measure the signal of at least one detected conductive strip of the touch screen according to one of a plurality of parameter sets.

Step 1430: sequentially measure signals of the at least one detected conductive strip according to other parameters of the plurality of parameter sets, until a measurement signal of the at least one detected conductive strip falls within a preset signal interval.

Step 1440: designating the measurement signal measured by the at least one detected conductive bar and falling within the preset signal interval as a level signal, and when the driving signal is provided to the reference conductive bar, it The corresponding parameter set is set as an initial parameter set.

Step 1450: The driving signals are sequentially provided to each or each group of the non-reference conductive bars.

Step 1460: When the driving signal is sequentially provided to each or each of the non-reference conductive bars, measure the signal of the at least one detected conductive bar according to each parameter set of the parameter set.

Step 1470: Determine an initial parameter set for each or each group of the non-reference conductive strips, wherein when the driving signal is separately provided to each or each group of the non-reference conductive strips, from the at least The signal measured by a detecting conductive strip is closer to the level signal than the signal measured from the at least one detecting conductive strip according to other parameter sets.

In one embodiment, the driving signal passes through a variable resistor to reach at least one detection conductive strip, wherein the impedance of the variable resistor changes according to a corresponding initial parameter when the driving signal is provided.

In one embodiment, the length of time for detecting is changed according to the corresponding initial parameter when the driving signal is provided.

In an embodiment, the driving signal is provided to at least one driving conductive bar after being amplified by a signal amplifier, wherein the amplification factor of the signal amplifier is changed according to a corresponding initial parameter when the driving signal is provided.

In an embodiment, the detection circuit measures a signal of the at least one detection conductive strip after a delay phase difference, wherein the detection circuit changes the delay according to a corresponding initial parameter when the driving signal is provided. Phase difference.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of patent application for the present invention; all other equivalent changes or modifications made without departing from the spirit disclosed by the present invention should be included in the following The scope of patent applications.

Claims (15)

    A detection device for a touch screen, comprising: a driving circuit for providing a driving signal to one or a group of driving conductive strips of the touch screen, wherein one or a group of the driving conductive strips are designated as one Or a set of reference conductive strips, and the rest of the driving conductive strips are designated as non-reference conductive strips; a detection circuit for measuring at least one detection of the touch screen according to one of a plurality of parameter sets Measuring the conductive strip to generate an evaluation signal corresponding to the driving conductive strip to which the driving signal is provided, wherein the driving signal is provided to the driving conductive strip according to the parameter set; and a control module for selecting the plural number One of the parameter sets is used as an initial parameter set of the reference conductive strip to generate the evaluation signal. The evaluation signal generated by the detection circuit according to the initial parameter set is designated as a leveling signal. Or an initial parameter set of each group of the non-reference conductive strips is selected from the plurality of parameter sets, which are generated with other parameter sets Compared estimate signal, the set of parameters of the evaluation signal corresponding initial parameters of the non-reference set of conductive strip produced is closest to the level of the reference signal in accordance with each article or group.         For example, the detection device of the first patent application range, wherein the control module is used to control the detection circuit to sequentially generate the evaluation signal according to each parameter set of the plurality of parameter sets, and is used to generate the reference conductivity. The parameter set of the largest of the evaluation signals of the bar is designated as the initial parameter set corresponding to the reference conductive bar.         For example, the detection device of the first patent application range, wherein the control module is used to control the detection circuit to sequentially generate the evaluation signal according to each parameter set of the plurality of parameter sets, and is used to generate the reference conductivity. The parameter set of those who first meet a condition in the evaluation signal of the strip is designated as the initial parameter set corresponding to the reference conductive strip.         For example, the detection device of the first patent application range, wherein the evaluation signal is a signal measured by a detection conductive strip.         For example, the detection device of the first patent application range, wherein the evaluation signal is a sum of signals measured by at least two detection conductive bars.         For example, the detection device of the first patent application range, wherein the driving signal passes through a variable resistor to reach at least one detection conductive strip, and the impedance of the variable resistor is corresponding to the initial value when the driving signal is provided. An initial parameter in the parameter set varies.         For example, the detection device according to item 1 of the patent application range, wherein the detection circuit changes the detection time length according to an initial parameter in the initial parameter set corresponding to when the driving signal is provided.         For example, the detection device of the scope of patent application, wherein the driving signal is provided to the driving conductive bar after being amplified by a signal amplifier, and the amplification factor of the signal amplifier is based on the corresponding initial parameter set when the driving signal is provided An initial parameter.         For example, the detection device of the scope of application for a patent, wherein the detection circuit measures a signal of the at least one detection conductive strip after a delay phase difference, and the detection circuit responds correspondingly when the driving signal is provided. An initial parameter of the initial parameter set changes the delay phase difference.         A detection method for a touch screen, comprising: designating one or a group of driving conductive bars of the touch screen as one or a group of reference conductive bars, designating the remaining driving conductive bars as non-reference conductive bars; providing a driver Signal to the reference conductive strip of the touch screen; sequentially measure at least one detection conductive strip of the touch screen according to each parameter set of the plurality of parameter sets, until the measurement result falls within a preset Within the signal range of the signal; designating the measurement signal falling within the preset signal range as a leveling signal, and designating the parameter set corresponding to the leveling signal as an initial parameter set of the reference conductive strip; Sequentially providing the driving signal to each or each of the non-reference conductive strips; sequentially measuring at least one detected conductive strip of the touch screen according to each parameter set of the plurality of parameter sets; and determining each or The initial parameter set of each group of the non-reference conductive strips, wherein when the driving signal is separately provided to each or each group of the non-reference conductive strips, according to the initial The resulting set of conductive strips parameter signal set closer than the signal level of the reference signal from the conductive strip obtained from the at least one detector detects the at least one according to other parameters.         For example, the detection method of claim 10, wherein the driving signal passes through a variable resistor to reach the at least one detection conductive strip, and the impedance of the variable resistor is corresponding to the initial value when the driving signal is provided. An initial parameter in the parameter set varies.         For example, the detection method of the tenth aspect of the patent application, wherein the detection time length is changed according to an initial parameter in the corresponding initial parameter set when the driving signal is provided.         For example, the detection method of claim 10, wherein the driving signal is provided to the driving conductive bar after being amplified by a signal amplifier, and the amplification factor of the signal amplifier is based on the initial parameter corresponding to the driving signal provided. An initial parameter of the set varies.         For example, the detection method of the tenth aspect of the patent application, wherein the signal of the at least one detection conductive strip is measured after a delay phase difference, and the delay phase difference is based on the initial value corresponding to the driving signal provided. An initial parameter of the parameter set varies.         A touch system includes the touch screen and the detection device according to any one of claims 1-9.