TWI533170B - Electronic device having touch panel and noise detection and operation mode configuration methods thereof - Google Patents

Description

Electronic device with touch panel and noise detection and operation mode setting method thereof

The invention relates to a touch module, and in particular to a method for setting a noise detection and operation mode of a capacitive touch module and an electronic device using the same.

With the development of touchpad technology, touch panels have been widely used in various electronic devices, such as smart phones and tablets. The touch panel is generally integrated with a display panel to form a touch system, which serves as an input and output interface of the electronic device to achieve a touch display function.

The operation of the touchpad is to detect the change of the sensing capacitance between the sensing lines on the touch panel, and to determine whether the touchpad is touched and the corresponding touch position by comparing the change of the sensing capacitance with a preset sensing threshold. . However, when the touchpad is in operation, it is susceptible to ambient noise. Furthermore, in recent years, in order to make the electronic device conform to the trend of lightness and thinness and reduce the manufacturing cost, the industry has continuously thinned the touch panel by changing the structure of the touch panel, for example, a double glass structure and a glass double film (Glass/ The Film/Film) touchpad architecture evolved into a single glass solution and the current In/On cell structure, making the touchpad closer to the display panel. Therefore, when the touch panel is in operation, it is more susceptible to interference of signals driving the display screen of the display panel, causing misjudgment and causing malfunction, thereby reducing the sensing accuracy and the reaction speed of the touch panel.

In view of the above, an embodiment of the present invention provides an electronic device with a touch panel and a method for setting a noise detection and operation mode thereof, which can actively detect and interfere with the touch panel when scanning the touch panel of the touch module. The intensity of the noise signal determines the operation mode of the touch module, and reduces or eliminates the influence of ambient noise on the touch panel, thereby improving the sensing accuracy and operational efficiency of the touch module.

The embodiment of the present invention provides a method for detecting a noise of an electronic device, wherein the electronic device includes a touch module and a display module, the touch module has a touch panel, and the touch panel is correspondingly disposed on On the display module. The noise detection method includes the following steps. First, a detection period of the touch panel is determined, wherein the detection period is greater than or equal to a driving period of the display module. Second, the detection period is divided into a plurality of detection sections. Then, the sensing information of each detecting section is obtained separately. Then, performing operation according to the sensing information corresponding to each detecting segment to obtain a noise reference information corresponding to the touch panel. Then, according to the noise reference information, an operation mode of the touch module is determined.

In one embodiment of the present invention, the touch module has a plurality of operation modes, and the step of determining an operation mode of the touch module according to the noise reference information includes: according to the noise reference information, The touch module enters one of the operation modes, wherein the operation modes respectively correspond to different touch sensing thresholds.

In one embodiment of the present invention, the number of the detection sections is an even number, and the sum of the times of the detection sections is equal to the length of time of the detection period.

In one embodiment of the present invention, the detection period is a sum of a driving period and an offset buffer period, and the length of the detecting section is at least greater than any one of the sensing lines on the touch panel. A sampling time, wherein the sampling time refers to a time during which at least one sensing value of the corresponding sensing line is sensed.

The embodiment of the present invention further provides a method for detecting noise and mode of an electronic device, wherein the electronic device includes a touch module and a display module, the touch module has a touch panel, and the touch panel It is correspondingly set on the display module. Miscellaneous The method of detecting and operating mode includes the following steps. First, a noise reference information corresponding to the driving signal is generated according to a driving signal of the display module. Next, it is determined whether the noise intensity value of the noise reference information is greater than the first preset noise threshold. If the noise intensity value is greater than the first preset noise threshold, the touch module enters a noise operation mode, wherein the touch module can detect two or two in the noise operation mode. The following touch objects. If the noise intensity value is less than the first preset noise threshold, the touch module is operated in a multi-object touch mode, wherein the touch module can detect the touch object in the multi-object touch mode. The maximum number is greater than the maximum number of touch objects that the touch module can detect in the noise operation mode.

In one embodiment of the present invention, the noise operation mode has a single object touch mode and a two object touch mode, and after determining that the noise intensity value is greater than the first preset noise threshold value, The method includes determining whether the noise strength value is greater than a second preset noise threshold. If the noise intensity value is greater than the second preset noise threshold, the touch module is brought into a single object touch mode, wherein the touch module detects only one touch object in the single object touch mode. . If the noise intensity value is less than the second preset noise threshold, the touch module is brought into the two object touch mode, wherein the touch module detects two or two in the two object touch modes. The following touch objects.

The embodiment of the invention further provides an electronic device, which includes a display module and a touch module. The touch module includes a touch panel and a processing unit. The touch panel is disposed on the display module, and the touch panel is provided with a plurality of sensing lines. The processing unit is electrically connected to the sensing lines. The processing unit is configured to determine a detection period of the touch panel, and scan the sensing lines on the touch panel during the detection period, wherein the detection period is greater than or equal to a driving period of the display module. The processing unit generates a noise reference information according to the scan results of the sensing lines.

The processing unit divides the detection period into a plurality of detection segments, and respectively obtains sensing information corresponding to each of the detection segments, and the processing unit performs operations on the sensing information corresponding to each of the detection segments. , generate noise reference information.

In one embodiment of the present invention, the touch module has a plurality of operation modes, and the processing unit causes the touch module to enter one of the operation modes according to the noise reference information, wherein the operation modes are respectively different. One touch sensing threshold.

The operating modes of the touch module include a first operating mode and a second operating mode. When the processing unit determines that the noise intensity value of the noise reference information is less than the first preset noise threshold, the processing unit causes the touch module to enter the first operation mode. When the processing unit determines that the noise intensity value of the noise reference information is greater than the first preset noise threshold, the processing unit causes the touch module to enter the second operation mode. The touch sensing threshold in the first mode of operation is greater than the touch sensing threshold in the second mode of operation.

Another embodiment of the present invention provides an electronic device including a display module and a touch module. The touch module includes a touch panel and a processing unit. The touchpad is disposed on the display module. The processing unit is electrically connected to the touch panel. The processing unit is configured to generate noise reference information corresponding to the driving signal according to the driving signal of the display module. The processing unit determines, according to the noise reference information, an operation mode of the touch module as a multi-object touch mode or a noise operation mode. The touch module detects one or more touch objects in a multi-object touch mode, and the touch module detects two or less touch objects in the noise operation mode.

When the processing unit determines that the noise intensity value of the noise reference information is less than the first preset noise threshold, the processing unit causes the touch module to enter the multi-object touch mode. When the processing unit determines that the noise intensity value is greater than the first preset noise threshold, the processing unit causes the touch module to enter a noise operation mode.

In one embodiment of the present invention, when the processing unit determines that the noise strength value is greater than the first preset noise threshold, the processing unit sets a noise flag, and the processing unit detects the noise flag. , the touch module enters the noise operation mode.

In addition, an embodiment of the present invention further provides a computer readable medium recording a set of computer executable programs. When the computer readable recording medium is read by the processor, the processor can execute the noise detection method of the electronic device. Noise detection and operation mode setting The steps in the method.

In summary, an embodiment of the present invention provides an electronic device having a touch panel, a noise detecting and operating mode setting method thereof, and an electronic device using the above method, which can be actively signaled by scanning the touch panel. The sampling method detects and captures the noise reference information (such as the strength or power of the noise signal) on the touch panel, and instantly drives the touch module of the electronic device to enter the corresponding operation mode according to the noise reference information. That is, entering an operation mode having a corresponding touch sensing threshold or the number of detectable objects, etc., simply and effectively reducing or eliminating noise interference on the touch panel. Accordingly, the present invention can improve the operational efficiency of the touch module, thereby improving the user's operating feel.

The detailed description of the present invention and the accompanying drawings are to be understood by the claims The scope is subject to any restrictions.

1‧‧‧Electronic device

10‧‧‧Touch Module

12‧‧‧ Trackpad

14‧‧‧Processing unit

16‧‧‧ storage unit

20‧‧‧Display module

TA~TD, TX, TY, T1~T7‧‧‧ time points

W1~WN‧‧‧Detection section

C10‧‧‧ Curve

S100~S150‧‧‧Step procedure

S210~S250‧‧‧Step process

S401~S411‧‧‧Step procedure

S501~S507‧‧‧Step procedure

S600~S620‧‧‧Step process

FIG. 1 is a schematic diagram of functions of an electronic device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a detection period in a scan frame of a touch module according to an embodiment of the present invention.

FIG. 3A is a schematic diagram of a detection period according to an embodiment of the present invention.

FIG. 3B is a schematic diagram of another detection period according to an embodiment of the present invention.

FIG. 3C is a schematic diagram of still another detection period according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of a detection period in a scan frame of a touch module according to another embodiment of the present invention.

FIG. 5 is a schematic flow chart of a method for detecting a noise of a touch panel according to an embodiment of the present invention.

FIG. 6 is a schematic flowchart of a method for setting an operation mode of a touch module according to an embodiment of the present invention.

FIG. 7 is a schematic flow chart of a method for setting an operation mode of a touch module according to another embodiment of the present invention.

FIG. 8 is a schematic flow chart of a method for setting an operation mode of a touch module according to another embodiment of the present invention.

FIG. 9 is a schematic flow chart of a method for setting an operation mode of a touch module according to still another embodiment of the present invention.

In the following, the invention will be described in detail by way of illustration of various exemplary embodiments of the invention. However, the inventive concept may be embodied in many different forms and should not be construed as being limited to the illustrative embodiments set forth herein. In addition, the same reference numerals may be used in the drawings to represent similar elements.

The method for processing the noise generated by the touch panel due to the coupling of the display module includes increasing the number of scans of the touch panel and then averaging as the basis for determining the touch position, filtering the noise interference by using the median filter, and transmitting the noise. A higher touch sensing threshold is used to filter noise. However, none of the above methods can effectively eliminate noise interference, and it also reduces the operational efficiency of the touch panel. For example, increasing the number of scans of the touchpad and then averaging as the basis for determining the touch position may reduce the scanning speed of the touch panel; while using the median filter to filter out noise interference and increasing the touch sensing threshold may be caused by Improper parameter setting causes insufficient touch sensitivity and reduces touch sensitivity.

Therefore, the present invention provides a method for setting a noise detection and operation mode of an electronic device with a touch panel, wherein at least one detection period is defined in a scan frame of the scanning touch panel, and the detection period is divided. For a plurality of detection sections, the noise signals generated by the signal coupling on the touch panel are accurately detected. The method for setting the noise detection and operation mode of the present invention can also dynamically determine the operation mode of the touch module of the electronic device according to the intensity of the noise signal, that is, the degree of influence of the noise signal on the touch panel. Eliminate the effects of noise signals on the touchpad. In addition, the present invention also provides an electronic device using the above noise detecting method.

Since the basic structure and implementation of the touch panel are of the prior art and are not the focus of the present invention, those skilled in the art should be familiar with the specific structure of the touch circuit and the basic driving and scanning operation modes, for example, Capacitance and mutual compatibility scanning And the touch position judgment and the like, and therefore will not be described again herein, but only the technology related to the present invention will be briefly described.

[Embodiment of Electronic Apparatus]

Please refer to FIG. 1 , which is a functional block diagram of an electronic device according to an embodiment of the present invention. In the embodiment, the electronic device 1 includes a touch module 10 and a display module 20 . The electronic device 1 can be, for example, an electronic device with a touch display function, such as a smart phone, a tablet, a touch-type notebook, a personal digital assistant (PDA), and a digital camera.

The touch module 10 is configured to sense a user's operation on the screen of the electronic device 1 by using the touch object, and correspondingly drive the electronic device 1 to perform a corresponding function, such as changing the display screen or clicking on the display screen. Display objects and so on. The display module 20 is configured to display a display screen corresponding to the operation of the electronic device 1 for the user of the electronic device 1 to browse and manipulate the electronic device 1.

In this embodiment, the touch module 10 includes a touch panel 12 , a processing unit 14 , and a storage unit 16 . The touch panel 12 and the storage unit 16 are electrically coupled to the processing unit 14 respectively. The processing unit 14 is used to control the operation of the touch panel 12 and the storage unit 16. Specifically, the processing unit 14 determines the operation mode of the touch module 10 according to the intensity of the noise signal sensed by the touch panel 12. The noise signal is a noise generated by a periodic signal (for example, a driving signal of the display module 20) existing in the environment of the electronic device 1.

Further, the touch panel 12 is disposed on the display module 20. The touch panel 12 is configured to sense at least one touch event that occurs on the screen of the electronic device 1 due to the touch object, and correspondingly output sensing information (such as a capacitance change sense value or a dv value) corresponding to the touch object. The processing unit 14 determines the touch position. The touch panel 12 can also be used to detect the noise information (such as the intensity value of the noise signal) on the touch panel 12 and output it to the processing unit 14 for the processing unit 14 to determine the strength of the noise signal.

In particular, the touch object can be a stylus or a finger, etc., and a touch change between the touch panel 12 of the touch module 10 can be induced. Control body.

A plurality of mutually inductive sensing lines (not shown) may be disposed on the touch panel 12, and the sensing lines are electrically connected to the processing unit 14 respectively. The sensing lines on the touch panel 12 can be inductively sensed by the touch object touch electronic device 1 and output to the processing unit 14 when being excited. The sensing signals output by the sensing lines on the touch panel 12 during scanning simultaneously include the influence of the noise signals.

The touch panel 12 can be implemented by a single or double layer capacitive touch panel. The touchpad 12 can be combined with the display module 20, for example, in a bonded or built-in manner. Specifically, the touch panel 12 can be integrated with the display module 20 and configured by an out-cell or an in-cell type, such as an on-cell or an in-cell. In the electronic device 1. The specific implementation of the touch panel 12 can be implemented according to the actual architecture of the electronic device 1, and the present invention is not limited thereto.

The processing unit 14 is configured to drive the sensing lines in a scanning frame of the scanning touch panel 12, and sequentially detect and capture the sensing information sensed by the sensing lines on the touch panel 12. The processing unit 14 calculates a noise reference information corresponding to the touch panel 12 according to the detected sensing information, and determines the influence degree of the noise signal on the touch panel 12, so as to correspondingly determine the touch module 10. Operating mode. After determining the operation mode of the touch module 10, the processing unit 14 sequentially scans the sensing lines in sequence, and determines whether the touch panel 12 is touched by the touch object and its corresponding touch position according to the scanning result.

Each of the scan frames includes a self-scan period and a mutual-scan period, and the processing unit 14 scans the self-capacity scan period and the mutual-capacity scan period. Or the mutual-capacitance scanning method scans the sensing lines on the touch panel 12, and determines whether the touch panel 12 is touched and the corresponding touch position according to the self-capacity scanning period and the scanning result in the mutual-capacity scanning period.

The above-mentioned scanning of the touch panel 12 by self-capacitance scanning or mutual capacitive scanning is a matter of the prior art, and is not a technical feature of the main improvement of the present invention. Said.

Further, the touch module 10 has a plurality of operation modes, and the processing unit 14 causes the touch module 10 to enter one of the operation modes according to the acquired noise reference information. The operation modes respectively correspond to different one-touch sensing thresholds (ie, preset capacitance sensing thresholds or preset dv values). Because each operation mode corresponds to the touch sensing threshold is different. therefore. The present invention can reduce the influence of the noise signal on the touch panel 12 by operating the touch module 10 at different touch sensing thresholds according to the degree of noise interference.

When the processing unit 14 determines that the noise signal interferes with the touch panel 12 too high according to the noise reference information (for example, the intensity of the noise signal is higher than a preset noise intensity threshold), the processing unit 14 can make the touch mode The group 10 enters an operation mode with a high touch sensing threshold (for example, 600 to 1000) to avoid misjudgment caused by the noise of the touch panel 12 being disturbed by the noise signal. When the processing unit 14 determines that the strength of the noise signal does not affect the interpretation of the touch panel 12 according to the noise reference information (for example, the intensity of the noise signal is lower than the preset noise intensity threshold), the processing unit 14 can touch The control module 10 enters an operation mode with a low touch sensing threshold (for example, 300) to provide multi-touch of the touch panel 12 and high touch sensitivity operation.

In this embodiment, the operation mode of the touch module 10 includes a first operation mode MD1, a second operation mode MD2, and a third operation mode MD3. The touch sensing threshold of the touch module 10 in the second operating mode MD2 is greater than the touch sensing threshold in the first operating mode MD1. The touch sensing threshold value of the touch module 10 in the third operation mode MD3 is greater than the touch sensing threshold value in the second operation mode MD2.

The first operation mode MD1, the second operation mode MD2, and the three operation modes MD3 can be set according to the actual operation requirements of the touch module 10. For example, the touch sensing threshold value of the touch module 10 in the first operation mode may be a lower limit value according to the finger touch sensing value, for example, 300. The touch sensing threshold of the touch module 10 in the second operation mode can generate the maximum touch sensing according to the finger touching the touch module 10 The value is set from 60% to 70%, for example, 600. The touch sensing threshold value of the touch module 10 in the third operation mode may be set according to 80% to 90% of the maximum touch sensing value generated by the touch of the touch module 10, for example, 800.

In more detail, when the processing unit 14 determines that the noise intensity value in the noise reference information is smaller than the first preset noise threshold TH1 according to the acquired noise reference information, the processing unit 14 causes the touch module 10 to make the touch module 10 Enter the first operating mode MD1. When the processing unit 14 determines that the noise intensity value in the noise reference information is greater than the first preset noise threshold TH1, the processing unit 14 further determines whether the noise intensity value is greater than the second preset noise threshold TH2. When the processing unit 14 determines that the noise intensity value in the noise reference information is less than the second preset noise threshold TH2, the processing unit 14 causes the touch module 10 to enter the second operation mode MD2. When the processing unit 14 determines that the noise intensity value of the noise reference information is greater than the second preset noise threshold TH2, the processing unit 14 causes the touch module 10 to enter the third operation mode MD3.

The processing unit 14 can cause the touch module 10 to enter the selected mode of operation by setting a flag. Specifically, the processing unit 14 can set the first miscellaneous when the noise intensity value in the noise reference information is greater than the first preset noise threshold TH1 and less than the second preset noise threshold TH2. The flag FG1 is set, and the processing unit 14 sets the second noise flag FG2 when detecting that the noise intensity value in the noise reference information is greater than the second preset noise threshold TH2. The processing unit 14 can clear the setting of the first noise flag FG1 or the second noise flag FG2 when the noise intensity value in the noise reference information is less than the first preset noise threshold TH1.

Accordingly, when the processing unit 14 detects the first noise flag FG1, the touch module 10 is brought into the second operation mode; when the processing unit 14 detects the second noise flag FG2, the touch mode is enabled. The group 10 enters a third mode of operation; when the processing unit 14 does not detect any flags, the touch module 10 is brought into the first mode of operation.

It is to be noted that the operation mode of the touch module 10 is only one implementation manner, and the operation mode setting manner of the touch module 10 may be based on the actual operation requirements of the touch panel 12 or noise interference. Level is set, so this implementation does not This is limited. Those skilled in the art should be able to infer the actual implementation of the operation mode setting of the touch module 10 by the above description, and therefore will not be described again.

The storage unit 16 is configured to store a touch sensing threshold corresponding to each of the operating modes, a first preset noise threshold TH1, and a second preset noise threshold TH1. The storage unit 16 can be used to store related parameters for detecting the reference information of the noise and the reference information of the noise. The storage unit 16 can be configured to store the settings of the first noise flag FG1 and the second noise flag FG2.

Specifically, the processing unit 14 may be implemented by using a code controller such as a microcontroller or an embedded controller, but the invention is not limited thereto. The storage unit 16 can be implemented by using a volatile or non-volatile memory chip such as a flash memory chip, a read-only memory chip or a random access memory chip, but the invention is not limited thereto.

For a more detailed description of the noise detection technique for the touch panel 12 of the present invention, please refer to FIG. 2 and also to FIG. FIG. 2 is a schematic diagram of a detection period in a scan frame of a touch module according to an embodiment of the present invention. The curve C10 represents the noise signal that the display module 20 interferes with the touch panel 12. As can be seen from FIG. 2, the display module 20 interferes with the noise signal of the touch panel 12 as a periodic signal. Therefore, the noise signal can be calculated and correlated by the noise signal to obtain the corresponding noise signal. Noise reference information.

Specifically, the processing unit 14 first determines a detection period (ie, time point TA~time point TB) in the scan frame (ie, time point TA~time point TD) according to the driving cycle of the display module 20, and The determined detection period is stored in the storage unit 16. The detection period (eg, time point TA~time point TB) is greater than or equal to the driving period of the display module 20. The driving period refers to a period in which a driving circuit (not shown) of the display module 20 drives a driving signal outputted by a display panel (not shown).

It is worth mentioning that, in practice, the driving signal outputted by the driving circuit of the display module 20 may be operated by an actual hardware circuit (for example, a digital to analog circuit). The reaction speed causes an error. Therefore, in order to more accurately make the detection period cover the period of the driving signal, the detection period (ie, the time point TA~the time point TB) may be selected as the driving period of the driving signal and an offset buffer period (offset). Sum. The length of the offset buffering period can be set according to the actual operation of the display module 20, which is not limited by the present invention.

The processing unit 14 may be configured to set at least one of a self-capacity scanning period (for example, a time point TA to a time point TC) or a mutual volume scanning period (for example, a time point TC to a time point TD) in the scanning frame of the scanning touch panel 12 . Detection cycle. The processing unit 14 scans one or more sensing lines on the touch panel 12 in a self-capacity or mutual-capacity scanning manner during the detection period (ie, the time point TA~the time point TB), so as to obtain the touch panel 12 Sensing information in the scan frame. Then, the processing unit 14 generates noise reference information corresponding to the scanned sensing lines according to the scanning results of the sensing lines.

In this embodiment, the self-capacitance scanning period of the touch panel 12 (ie, the time point TA~the time point TC) covers a detection period (ie, the time point TA~the time point TB). The processing unit 14 scans one of the sensing lines on the touch panel 12 in a self-capacitance scanning manner during the detection period (ie, the time point TA~the time point TB).

The processing unit 14 may divide the detection period (ie, the time point TA~ the time point TB) into a plurality of detection segments having the same or different time lengths according to requirements, wherein the number of the detection segments is at least greater than or equal to two, And the number of the detection sections is an even number. The processing unit 14 drives the selected sensing lines in the detecting sections in sequence, and correspondingly acquires sensing information thereof. The processing unit 14 can obtain the noise reference information by calculating a difference between the sensing information of two of the detecting sections.

In order to accurately obtain the noise reference information corresponding to the noise signal, in an embodiment, at least another detection section is preferably spaced between the two detection sections selected in the foregoing. That is, the two detection sections calculated by the above selection are two detection sections that are not adjacent.

In another embodiment, the processing unit 14 may divide the detection sections into at least one detection group, where the any detection group includes at least two detection sections. deal with The unit 14 further compares the sensing information of the detection segments of the same detection group to obtain a comparison result corresponding to the detection group. The processing unit 14 performs an operation on the comparison result of the at least one detection group to obtain the noise reference information corresponding to the touch panel 12 .

As described above, the sensing information is generated by sampling in each of the detecting sections to generate a plurality of sensing values, and then obtaining the corresponding detectors by performing operations on the sensing values in the detecting sections. The sensing information of the measuring section. The sensing information of each detecting section may be an average, a least square, and a root mean square of the sensing values in each detecting section. An integral value or other statistical value that can represent the sensed values. The sampling manner of the detection sections and the calculation method of the sensing information are all known in the art, and therefore are not described herein.

In more detail, please refer to FIG. 3A and refer to FIG. 1 and FIG. 2 at the same time. FIG. 3A is a schematic diagram of a detection period according to an embodiment of the present invention.

As shown in FIG. 3A, the processing unit 14 divides the detection period (ie, the time point TA~TB) into a plurality of detection segments W1~WN, where N is an even number and N is greater than or equal to 2. The detection sections W1 W WN cover an interference area (ie, time point TA~TX) and a non-interference area (ie, time point TX~TB). The interference area (ie, the time point TA~TX) is the driving time of the driving signal corresponding to the driving circuit of the display module 20, and the non-interference area (ie, the time point TX~TB) is here. It is the off time corresponding to the drive signal, that is, the noise-free state. The processing unit 14 can obtain the noise reference information by comparing the difference between the sensing values in the interference region (ie, the time point TA~TX) and the non-interference region (ie, the time point TX~TB).

As can be seen from FIG. 3A, adjacent detection segments (eg, detection segments W1 and W2) are located in the interference region, and the difference in sensing values between each other is small, and may even be zero, so the processing unit 14 It may not be possible to determine the presence or absence of noise by using the noise reference information obtained by the calculation. Therefore, as described above, it is preferable to accurately obtain the noise reference information by comparing the non-adjacent detection sections.

In addition, please refer to FIG. 3B, which illustrates a schematic diagram of another detection period according to an embodiment of the present invention. In order to more accurately make the detection period completely cover the period of the driving signal, as shown in FIG. 3B, the detection period may further include a buffer area (ie, time point TY~TB). The time length of the buffer area (ie, the time point TY~TB) corresponds to the time of the offset buffer period to compensate the driving signal outputted by the driving circuit of the display module 20 due to the actual hardware circuit (for example, digital to analogy) Circuit) The error caused by the speed of operation of the circuit.

Then, in this embodiment, the lengths of the detection sections W1 to WN are the same. The length of each of the detecting sections W1 to WN is at least one sampling time of the touch panel 12 for any one of the sensing lines, wherein the sampling time refers to a time for sensing at least one sensing value of the corresponding sensing line. The minimum value of the sampling time (for example, 100 ms to 300 ms) may be limited by the actual reaction time of the hardware circuit in the touch panel 12, for example, the time during which the induced voltage in the analog-to-digital circuit is converted into an induced value. The maximum length of each of the detection sections W1 to WN is the length of the detection period divided by the total number of detection sections W1 to WN.

However, in other embodiments, the length of time of each of the detecting sections W1 to WN may also be different according to the time required for sampling. In other words, the length of each of the detection sections W1 to WN can be set according to the sampling operation requirement, as long as the total time of the detection sections W1 to WN is equal to the length of the set detection period, the present invention is not limited thereto. .

Incidentally, if the processing unit 14 sets the detection period to the self-capacity scanning period, the sampling time of each of the detection sections (ie, the detection sections W1 to WN) may be driven by the processing unit 14 A sensing line on the touchpad 12 receives the time required to sense the sensed value corresponding to the strip sensing line. If the processing unit 14 sets the detection period to the mutual-capacity scanning period, the sampling time of each of the detection sections (ie, the detection sections W1 to WN) may be that the processing unit 14 drives the upper edge of the touch panel 12 A sensing line of the first axial direction (e.g., the X-axis direction) receives the time required to sense the sensed value along the second axial direction (e.g., the Y-axis term) and the other sensing line interleaved with the sensing line.

Then, the processing unit 14 drives the scanning touch panel 12 to obtain sensing information corresponding to each of the detecting segments. The processing unit 14 performs operation on the sensing information corresponding to each of the detecting segments (ie, the detecting segments W1 to WN) to generate noise reference information corresponding to the scanned frame. The processing unit 14 can calculate the sensing value obtained by each of the detecting segments (ie, detecting segments W1 to WN) by using formula (1) to generate a noise intensity value in the noise reference signal. Wherein, on behalf of a scan frame LNL noise intensity value; W _T representative of the number of the plurality of detection sections W1 ~ WN, and 2 W _T N , and N is an even number; W _k represents the sensing value of k detection segments; i represents a detection segment increment parameter, where i is a positive integer and is between 1~ .

For example, please refer to FIG. 3C , which is a schematic diagram of another detection period according to an embodiment of the present invention. If the processing unit 14 divides the detection period (ie, the time point TA~TB) into four detection segments. For W1~W4, the W _T in equation (1) is 4 and the increment parameter i is set to 2, so as to compare non-adjacent detection segments. Then, the processing unit 14 can calculate the accumulated difference of the sensing information of the detection sections in the detection period by using the formula (1).

In detail, the processing unit 14 can separately calculate a first sensing difference value between the detecting section W1 and the detecting section W3 and a second sensing difference value between the detecting section W2 and the detecting section W4. The processing unit 14 uses the sum of the first sensing difference value and the second sensing difference value as the noise reference information of the sensing line correspondingly selected in the scanning frame.

It is to be noted that, referring to FIG. 4, FIG. 4 is a schematic diagram of a detection period in a scan frame of a touch module according to another embodiment of the present invention. Processing unit 14 can also Covering a self-capacity scan period (eg, time point T1 to time point T3) in a scan frame (eg, time point T1 to time point T6) and a mutual capacitance scan period (eg, time point T3 to time point T6) Detection period (ie, time points T1~T2, T2~T3, T3~T4, T5~T6, T6~T7), and perform computational analysis (such as calculation) on multiple sensing information acquired during these detection periods The average or maximum value of the noise intensity values in the sensing information is generated to generate noise reference information corresponding to the scanned frame.

In the present embodiment, the processing unit 14 detects the sensing value of a sensing line on the touch panel 12 during a detection period, and uses the change of the sensing value as the touch panel 12 in the scanning frame. Noise reference information. In practice, the processing unit 14 may sequentially scan the sensing lines on the touch panel 12 during the detection period, and generate the touch panel 12 in the scanning according to the change of the sensing values of the sensing lines. Frame noise information.

In addition, since the voltages of the driving signals required for the display module 20 to display different display screens are not the same, the noise level of the driving signals of the display module 20 to the touch panel 12 of the touch module 10 will change accordingly. . Therefore, the touch module 10 of the present invention can sense the intensity of the noise signal generated by the coupling induction on the touch panel 12 by detecting and capturing the noise reference information for each scan frame. At the same time, the touch module 10 can dynamically determine the operation mode of the touch module 10 according to the intensity of the noise signal sensed by the touch panel 12, thereby eliminating the driving signal of the display module 20 to the touch module. The impact of the operation of the 10 touchpad 12.

It should be noted that the present invention does not limit the physical architecture and implementation of the touch module 10 and the display module 20. The processing unit 14 and the storage unit 16 can be implemented by a hardware circuit structure as needed, or integrated into a detection chip and implemented with a firmware design. It is to be noted that FIG. 1 is only a schematic diagram of a system architecture of an electronic device provided by an embodiment of the present invention, and is not intended to limit the present invention. Similarly, FIG. 2, FIG. 3A, FIG. 3B, FIG. 3C and FIG. 4 are only used to illustrate the waveform diagram of the noise detection scanning operation of the embodiment, and are not intended to limit the present invention.

[Embodiment of noise detection method]

In the above embodiments, the present invention can be applied to a method for detecting a noise of a touch panel, which is applicable to the electronic device with a touch panel described in the above embodiments. Referring to FIG. 5 and FIG. 3A, FIG. 5 is a schematic flow chart of a method for detecting a noise of a touch panel according to an embodiment of the present invention.

In step S100, the processing unit 14 defines a plurality of operation modes of the touch module 10, and each operation mode corresponds to a touch sensing threshold. Specifically, the processing unit 14 can have the touch module 10 have multiple operating modes by defining a plurality of different touch sensing threshold touches. The processing unit 14 may pre-store the defined touch sensing thresholds in the storage unit 16.

In step S110, the processing unit 14 predetermines a detection period of the touch panel according to a driving period of the display module 20 in the scan frame (between the time point TA and the time point TD in FIG. 2). The detection period (ie, the time point TA to the time point TB in FIG. 2) is at least greater than or equal to the driving period of the display module 20. More specifically, the detection period may be the sum of the driving period of the display module 20 and an offset buffer period. The processing unit 14 can determine one or more detection periods in the self-capacity scanning period or the mutual-capacity scanning period of the scanning frame according to the operation requirements of the touch panel 12 and the degree of noise interference, so as to accurately capture the miscellaneous Reference information.

In step S120, the processing unit 14 divides the detection period into a plurality of detection segments, and each of the detection segments has the same length of time. It should be noted that the number of the detection segments is an even number, and the number of the detection segments is at least greater than or equal to two. In addition, the sum of the lengths of the detection sections is equal to the length of the detection period. In this embodiment, the maximum length of the detection segment is the length of the detection period divided by the total number of detection segments W1 W WN.

In step S130, the processing unit 14 drives the touch panel 12 to detect and obtain the sensing information of each detecting segment. The processing unit 14 can generate a plurality of sensing values by sampling one or more sensing lines selected on the touch panel 12 in each of the detecting sections, and then transmitting the senses in the detecting sections. The measurement is performed to obtain the sensing information corresponding to each of the detection segments. The sensing information of each detection section may be each of the Detectives The average value, the least square value, the squared average value, the integral value or other statistical values of the sensed values in the measured section.

In step S140, the processing unit 14 performs an operation according to the sensing information corresponding to each of the detecting segments to obtain a noise reference information corresponding to the touch panel 12. In detail, the processing unit 14 can generate noise reference information by calculating a difference between sensing information of two of the detecting sections. In order to accurately obtain the noise reference information corresponding to the noise signal, at least another detection section is preferably spaced between the two detection sections of the selection calculation.

In step S150, the processing unit 14 determines an operation mode of the touch module 10 based on the noise reference information. Specifically, the processing unit 14 can cause the touch module 10 to enter an operation mode with an appropriate touch sensing threshold according to the noise intensity value of the noise reference information.

The present invention further provides a method for setting an operation mode of a touch module, which is applicable to the electronic device with a touch panel described in the above embodiments. The method for determining the operation mode of the touch module 10 is further described below for the processing unit 14. Referring to FIG. 6 and FIG. 1 , FIG. 6 is a schematic flowchart diagram of a method for setting an operation mode of a touch module according to an embodiment of the present invention.

In the embodiment of FIG. 6 , the touch module 10 has a first operation mode, a second operation mode, and a third operation mode. The touch sensing threshold (eg, 600) of the touch module 10 in the second operating mode MD2 is greater than the touch sensing threshold (eg, 300) in the first operating mode MD1. The touch sensing threshold value (for example, 800) of the touch module 10 operating in the third operation mode MD3 is greater than the touch sensing threshold value in the second operation mode MD2.

In step S210, when the processing unit 14 drives the touch panel 12 to capture and generate the noise reference information corresponding to the driving signal of the display module 20, the processing unit 14 determines whether the noise intensity value of the noise reference information is greater than the first. The default noise threshold TH1.

When the processing unit 14 determines that the noise intensity value of the noise reference information is less than the first preset noise threshold TH1, step S220 is performed. Conversely, when the processing unit 14 determines When the noise intensity value of the noise reference information is greater than the first preset noise threshold TH1, step S230 is performed.

In step S220, the processing unit 14 drives the touch module 10 to enter the first operation mode MD1. That is, the touch panel 12 senses the coupling amount of the driving signal of the display module 20, and the touch panel 12 is not misjudged.

In step S230, the processing unit 14 further determines whether the noise intensity value of the noise reference information is greater than the second preset noise threshold TH2. When the processing unit 14 determines that the noise strength value of the noise reference information is less than the second preset noise threshold TH2, step S240 is performed. On the other hand, when the processing unit 14 determines that the noise strength value of the noise reference information is greater than the second preset noise threshold TH2, step S250 is performed.

In step S240, the processing unit 14 drives the touch module 10 to enter the second operation mode MD2. In other words, the processing unit 14 determines that the coupling amount of the driving signal of the touch module 10 to the display module 20 is sufficient to affect the touch operation of the touch panel 12 . Therefore, the touch module 10 needs to enter the second operation mode MD2.

In step S250, the processing unit 14 drives the touch module 10 to enter the third operation mode MD3. The processing unit 14 determines that the amount of the driving signal coupling of the touch panel 12 to the display module 20 interferes with the touch operation of the touch panel 12, affects the judgment of the touch position, and may even cause a malfunction. Therefore, the processing unit 14 causes the third operation mode MD3 of the touch module 10 to increase the touch sensing threshold again.

It should be noted that the mode setting method of FIG. 5 and FIG. 6 can be performed by directly processing the processing chip of the processing unit 14 in a firmware manner, so that the processing unit 14 performs the noise of FIG. 5 during operation. The detection method and the mode setting method of FIG. 6 are not limited in the present invention. The processing unit 14 may be a processing chip such as a microcontroller or an embedded controller, but the invention is not limited thereto.

The mode setting method of Fig. 6 can also be adjusted according to actual operational requirements. For example, the touch module 10 can have only a first mode of operation (such as a normal mode of operation) and a second mode of operation (such as a noise mode of operation). Therefore, the processing unit 14 can directly drive the touch module 10 into the second operation mode in step S230, and the steps S240 to S250 are omitted. And the steps of determining to enter the second mode of operation or the third mode of operation.

It should be noted that FIG. 5 and FIG. 6 are only used to describe the noise detection and mode setting method for the electronic device 1 in this embodiment, and are not intended to limit the present invention.

In addition, in order to avoid the instability of the operation of the touch panel 12, or the voltage amplitude of the driving signal of the display module 20 displaying a certain screen is too high, the amount of noise coupling suddenly increases, and thus the touch module is misjudged. 10 frequently switching the operation mode and reducing the operation efficiency of the touch module 10. The embodiment of the present invention further provides a de-bounce mechanism applied to the operation mode setting method of the touch module 10 to solve the above problem. .

Referring to FIG. 7 and FIG. 1 simultaneously, FIG. 7 is a schematic flowchart of a method for setting an operation mode of a touch module according to another embodiment of the present invention. FIG. 7 illustrates that the first bounce program provided by the present invention is executed when the touch module 10 is operated in the first operation mode MD1 to avoid frequent switching of the operation mode of the touch module 10.

When the touch module 10 is operated in the first operation mode, if the processing unit 14 determines that the noise intensity value in the noise reference information corresponding to a detection period is greater than the first preset noise threshold TH1 (for example, in the figure) After step S230 of 6), the first preset time is started, for example, 5 detection periods or 3 scan frames.

Then, in step S401, the processing unit 14 calculates corresponding detection information according to the noise reference information acquired in each detection period in the first preset time (for example, 5 detection periods or 3 scan frames). The first count value of the cycle. The first count value is proportional to the noise intensity value in the noise reference information.

Specifically, the processing unit 14 may calculate a corresponding first count value according to the noise intensity value in the noise reference information and the first preset noise threshold TH1 by using the formula (3).

In step S403, the processing unit 14 determines that the complex is in the first preset time. Whether a cumulative value of the plurality of first count values is greater than a first predetermined threshold. In detail, the processing unit 14 calculates the integrated value of the first count values corresponding to the plurality of detection periods in the first preset time by using the formula (3), and determines whether the accumulated values of the first count values are Greater than the first preset threshold. The processing unit 14 stores the accumulated value of the plurality of first count values calculated in the first preset time in the storage unit 16.

In addition, in other embodiments, the processing unit 14 may also increment the first count value when the noise intensity value in the acquired noise reference information is greater than the first preset noise threshold TH1. Then, the processing unit 14 determines whether the accumulated value of the plurality of first count values in the first preset time is greater than the first preset threshold to determine whether to drive the touch module 10 to perform the operation mode switching action. Since the first count value obtained by using the formula (3) can be proportionally increased according to the noise intensity value in the noise reference information, the noise state on the touch panel 12 can be more quickly reflected, so in practice Preferably, the first count value is calculated by the calculation method of the formula (3).

When the processing unit 14 determines that the accumulated value of the first count values in the first preset time is greater than the first preset threshold (for example, 10), step S405 is performed. On the other hand, when the processing unit 14 determines that the accumulated value of the first count values in the first preset time is less than the first preset threshold, step S407 is performed.

In step S405, the processing unit 14 determines whether the maximum or average value of the noise intensity values is greater than the second preset noise threshold TH2 in the first preset time, to determine that the driving touch module 10 enters the first The second operation mode MD2 or the third operation mode MD3.

When the processing unit 14 determines that the maximum value or the average value of the noise intensity values is greater than the second preset noise threshold TH2 within the first preset time, step S409 is performed. On the other hand, when the processing unit 14 determines that the maximum value or the average value of the noise intensity values is less than the second preset noise threshold TH2 in the first preset time, step S411 is performed.

In step S407, when the processing unit 14 determines that the accumulated value of the first count values is less than the first preset threshold in the first preset time, the processing unit 14 causes the touch module 10 to maintain the operation. An operating mode MD1.

In step S409, when the processing unit 14 determines that the maximum or average value of the noise intensity values is greater than the second preset noise threshold TH2 in the first preset time, the processing unit 14 causes the touch module to be 10 enters the third operation mode MD3.

In step S411, when the processing unit 14 determines that the maximum or average value of the noise intensity values is less than the second preset noise threshold TH2 in the first preset time, the processing unit 14 causes the touch module to be 10 enters the second operation mode MD2.

It is to be noted that, in another embodiment, in step S405, the processing unit 14 may also be the integrated value of the noise intensity values and the second preset noise threshold value in the first preset time. TH2 is compared as a basis for determining the operation mode of the touch module 10.

In still another embodiment, in step S405, the processing unit 14 may also determine to make the touch module 10 enter the second according to the maximum value or the average value of the first count values in the first preset time. Operation mode MD2 or third operation mode MD3. For example, when the processing unit 14 determines that the maximum value or the average value of the first count values in the first preset time is less than the preset noise count threshold, the processing unit 14 causes the touch module 10 to enter the second The operation mode MD2; when the processing unit 14 determines that the maximum value or the average value of the first count values in the first preset time is greater than the preset noise count threshold, the processing unit 14 causes the touch module 10 to enter the third Operating mode MD3.

Then, the above is caused by the interference level of the noise signal sensed on the touch panel 12 being too high, so that the touch module 10 is switched from the normal operation mode (ie, the first operation mode MD1) to the noise operation mode (ie, the second Operation mode MD2 or third operation mode MD3). Another embodiment of the present invention provides another bounce mechanism that returns to the normal operation mode (ie, the first operation mode MD1) by the noise operation mode (ie, the second operation mode MD2 or the third operation mode MD3). Referring to FIG. 8 and FIG. 1 , FIG. 8 is a schematic flowchart of a method for setting an operation mode of a touch module according to another embodiment of the present invention. FIG. 8 is a schematic diagram of the second debounce program provided by the present invention, when the touch module 10 is operated in the second operation mode MD2 or the third operation mode MD3, so as to avoid frequent switching operation modes of the touch module 10 Case.

When the touch module 10 is operated in the second operation mode MD2 or the third operation mode MD3, the processing unit 14 determines that the noise intensity value in the noise reference information corresponding to a detection period is smaller than the first preset noise threshold. After the value TH1 (for example, after step S230 of FIG. 6), the second preset time is started, for example, 5 detection periods or 3 scan frames. The first preset time and the second preset time may be the same or different, and may be set according to the execution requirements of the first and second bounce programs and/or the switching operation requirements of the operation mode, and the present invention not limited.

Next, in step S501, the processing unit 14 correspondingly reduces the accumulated value of the first count value calculated in the first preset time according to the noise reference information in the second preset time.

Specifically, the processing unit 14 calculates a first count value corresponding to each detection period according to the noise reference information acquired in each detection period in the second preset time. The processing unit 14 uses the formula (4) to calculate the first count value corresponding to the detection period according to the noise intensity value in the noise reference information and the first preset noise threshold TH1.

The processing unit 14 subtracts the accumulated value of the first count values accumulated when entering the second operation mode MD2 or the third operation mode MD3 by the first count value calculated in the second preset time.

In step S503, the processing unit 14 determines whether the accumulated value of the first count value is less than or equal to a second preset threshold (for example, zero) in the second preset time.

In detail, the processing unit 14 calculates, by using the formula (4), the accumulated value of the first count value when the first operation mode MD2 or the third operation mode MD3 is first entered in the first preset time, and the second preset. The subtraction of the first count values corresponding to the calculation of the plurality of detection periods is acquired in time. The processing unit 14 determines whether the first count value is less than or equal to a second predetermined threshold (eg, zero).

When the processing unit 14 determines the accumulation of the first count value accumulated in the second preset time When the value is greater than the second preset threshold (for example, zero), step S505 is performed. On the contrary, when the processing unit 14 determines that the first count value is less than or equal to the second preset threshold (for example, zero), step S507 is performed.

In step S505, when the processing unit 14 determines that the accumulated value of the first count value is greater than the second preset threshold (eg, zero) in the second preset time, the processing unit 14 maintains the touch module 10 to operate at the current location. The second operation mode MD2 or the third operation mode MD3 of the operation is performed, and the process returns to step S501.

In step S507, when the processing unit 14 determines that the accumulated value of the first count value in the second preset time is less than or equal to the second preset threshold (for example, zero), the processing unit 14 causes the touch module 10 to enter the first operation. Mode MD1.

It is to be noted that, in another implementation, after the processing unit 14 determines that the noise strength value in the noise reference information corresponding to a detection period is less than the first preset noise threshold TH1, the processing unit 14 also The accumulated value of the first count value calculated in the first preset time may be directly reduced according to the noise reference information. In other words, the processing unit 14 may not perform the correlation step of counting the second preset time and calculating the accumulated value of the first count value in the second preset time by using the formula (4), but directly detecting the detection every time. After the noise intensity value in the periodic noise reference information is smaller than the first preset noise threshold TH1, the first calculation calculated in the first preset time is directly reduced according to the noise reference information by using the formula (4). The cumulative value of the value. Then, based on the accumulated value of the first count value, it is determined whether the touch module 10 is switched from the current operation mode (ie, the second operation mode MD2 or the third operation mode MD3) to the first operation mode MD1.

In still another embodiment, the processing unit 14 may also preset a second count value (eg, 10). When the processing unit 14 determines that the noise intensity value is less than the first preset noise threshold, the processing unit 14 starts counting the second preset time. The processing unit 14 determines, according to the obtained noise reference information each time, in the second preset time, if the processing unit 14 determines that the noise intensity value is smaller than the first preset noise threshold, the second step is gradually reduced. Count value.

For example, when the processing unit 14 obtains the noise reference information for each operation in the second preset time, according to the ratio between the first preset noise threshold value and the noise intensity value or the noise intensity value, Gradually reduce the second count value. When the processing unit 14 determines that the second count value is less than or equal to the second preset threshold (eg, zero), the touch module 10 is caused to enter the first operation mode MD1. When the processing unit 14 determines that the second count value is still greater than the second preset threshold (eg, zero), the touch module 10 is maintained to operate in the currently selected operation mode (ie, the second operation mode MD2 or The third mode of operation MD3).

Specifically, in the method of FIG. 7 , in order to avoid the first count value being too large, the processing unit 14 performs the slow return of the first operation mode of FIG. 8 , and the processing unit 14 may be within the first preset time. When the calculated integrated value of the first count value is greater than the preset threshold, the integrated value of the first count value is directly set as the first preset threshold.

In the processing unit 14 performing the first bounce process of FIG. 7 or the second bounce process of FIG. 8, the processing unit 14 uses the formula when detecting that the noise intensity value is greater than the first preset noise threshold. 3) Calculating the accumulated value of the first count value at the first preset time; the processing unit 14 calculates the first count value by using the formula (4) when detecting that the noise intensity value is less than the first preset noise threshold value And correspondingly reducing the accumulated value of the first count value calculated in the first preset time according to the calculated first count value.

The first count value, the second count value, the first preset threshold, and the second preset threshold may be stored in the storage unit 16. The mode setting method of FIG. 7 and FIG. 8 may be implemented by writing a processing chip of the processing unit 14 through a firmware programming manner, so that the processing unit 14 performs the mode setting method of FIG. 7 and FIG. 8 during operation. The invention is not limited.

Accordingly, by performing the debounce mechanism execution method of FIG. 7 and FIG. 8, the operation mode switching efficiency of the touch module 10 during operation can be effectively provided, and the utility of the noise detection method and mode setting of the present invention is improved. . It should be noted that FIG. 7 and FIG. 8 are only used to describe the implementation method of the anti-jump mechanism for avoiding the switching operation mode of the touch module 10 being too frequent, and are not intended to limit the present invention.

[Another embodiment of the mode setting method]

According to the above embodiments, the present invention can be applied to another method for detecting a noise of a touch panel, which is applicable to the electronic device with a touch panel described in the above embodiments. Referring to FIG. 9 and FIG. 1 simultaneously, FIG. 9 is a schematic flowchart diagram of a method for setting an operation mode of a touch module according to an embodiment of the present invention.

In this embodiment, the touch module 10 has a multi-object touch mode and a noise operation mode. The touch module 10 can detect one or more touch objects in the multi-object touch mode, and the touch module 10 can only detect two or less touch objects in the noise operation mode. The maximum number of touch objects that can be detected by the touch module 10 in the multi-object touch mode is greater than the maximum number of touch objects that the touch module 10 can detect in the noise operation mode. The touch object can be, for example, a finger or a stylus.

In step S600, when the processing unit 14 drives the touch panel 12 to capture and generate the noise reference information corresponding to the driving signal of the display module 20, the processing unit 14 determines whether the noise intensity value of the noise reference information is greater than the first. The default noise threshold TH1.

When the processing unit 14 determines that the noise intensity value of the noise reference information is less than the first preset noise threshold TH1, step S610 is performed. On the other hand, when the processing unit 14 determines that the noise intensity value of the noise reference information is greater than the first preset noise threshold TH1, step S620 is performed.

In step S610, the processing unit 14 causes the touch module 10 to operate in a multi-object touch mode. In step S620, the processing unit 14 causes the touch module 10 to enter the noise operation mode.

Further, when the processing unit 14 determines that the noise intensity value of the noise reference information is greater than the first preset noise threshold TH1, the processing unit 14 sets a noise flag FG_N. Then, when the processing unit 14 detects the noise flag FG_N, the processing unit 14 causes the touch module 10 to enter a noise operation mode. When the processing unit 14 does not detect the noise flag FG_N, the processing unit 14 causes the touch module 10 to operate in the multi-object touch mode.

In another embodiment, the noise operation mode may further include a single An object touch mode (such as a single-finger mode) and a two-object touch mode (such as a two-finger mode). The touch sensing threshold value of the touch module 10 in the single object touch mode is greater than the touch sensing threshold value in the two object touch modes, and the touch sensing threshold value in the two object touch modes is greater than The touch sensing threshold of the object touch mode.

The processing unit 14 may determine whether the noise intensity value is greater than a second preset noise threshold TH2 after determining that the noise strength value is greater than the first preset noise threshold TH1.

When the processing unit 14 determines that the noise intensity value is greater than the second preset noise threshold TH2, the processing unit 14 causes the touch module 10 to enter a single object touch mode, wherein the touch module 10 is in a single object touch mode. Only one touch object can be detected.

For example, the processing unit 14 only calculates the maximum of the sensing signals that are determined by the sensing lines (not shown) on the touch panel 12 to be greater than the touch sensing threshold in the single object touch mode. The touch location corresponding to the value.

When the noise intensity value of the processing unit 14 is less than the second preset noise threshold TH2, the processing unit 14 causes the touch module 10 to enter the two object touch mode, wherein the touch module 10 is in the touch mode of the two objects. Ability to detect two or fewer touch objects.

In addition, in order to avoid switching the operation mode of the touch module 10 too frequently, the first and second bounce programs illustrated in FIG. 7 and FIG. 8 above may also be used in this embodiment. For example, the first and second debounce programs of FIG. 7 or FIG. 8 may be executed according to the current operation mode of the touch module 10 after step S600.

The mode setting method of FIG. 9 may also be implemented by a firmware programming method written on the processing chip of the processing unit 14 to enable the processing unit 14 to perform the mode setting method of FIG. 9 during operation, which is not limited by the present invention.

In addition, the present invention can also utilize a computer readable recording medium to store the noise detection method described in FIG. 5, the operation mode setting method described in FIG. 6 and FIG. 9, and the inverse of FIG. 7 and FIG. Computer program code such as a program execution method, etc. The aforementioned steps are performed when the computer readable recording medium is read by a processor. The computer readable medium can be a floppy disk, a hard disk, a compact disk, a flash drive, a magnetic tape, a database accessible by the network, or a storage medium that can be easily thought of by the person skilled in the art.

[Possible effects of the examples]

In summary, an embodiment of the present invention provides an electronic device with a touch panel and a method for setting a noise detection and operation mode, which can be detected and captured by a signal sampling method during scanning of the touch panel. Noise reference information on the touch panel (such as the strength or power of the noise signal), and promptly and quickly drive the touch module of the electronic device into the corresponding operation mode according to the noise reference information, thereby effectively eliminating the The influence of noise on the touchpad improves the operational efficiency of the touch module and the user's operational feel.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the invention.

S100~S150‧‧‧Step procedure

Claims (41)

A method for detecting a noise of an electronic device, wherein the electronic device includes a touch module and a display module, the touch module has a touch panel, and the touch panel is correspondingly disposed on the display module And the touch panel is provided with a plurality of sensing lines, the noise detecting method includes: determining a detecting period of the touch panel, and scanning the sensing lines on the touch panel during the detecting period The detection period is greater than or equal to a driving period of the display module; the detection period is divided into a plurality of detection sections; respectively, sensing information of each detection section is obtained, and each detection section is The sensing information has sensing information of the sensing lines; and calculating according to the sensing information corresponding to each detecting segment to obtain a noise reference information corresponding to the touch panel. The method for detecting a noise of an electronic device according to claim 1, wherein the touch module has a plurality of operation modes, and after acquiring the corresponding reference information of the noise on the touch panel, the method comprises: The noise reference information causes the touch module to enter one of the operation modes, wherein the operation modes respectively correspond to different one touch sensing thresholds. The method for detecting a noise of an electronic device according to claim 1, wherein the step of performing the operation according to the sensing information corresponding to each of the detecting segments to obtain the noise reference information comprises: calculating the The difference between the sensing information of the two detecting segments in the detecting segment is used to obtain the noise reference information. The method for detecting a noise of an electronic device according to claim 3, wherein the two detection sections that perform the calculation are separated by at least another detection section. The method for detecting a noise of an electronic device according to claim 1, wherein the step of performing the operation according to the sensing information corresponding to each of the detecting segments to obtain the noise reference information comprises: Dividing the plurality of detection segments into at least one detection group; comparing sensing information of the detection segments of the same detection group to obtain a comparison result corresponding to the detection group; and The comparison result of the detection group is calculated to obtain the noise reference information, wherein the any detection group includes at least two detection segments. The method for detecting a noise of the electronic device of claim 1, wherein the detecting sections include a first detecting section, a second detecting section, and a third detecting section arranged in time. And the step of obtaining the noise reference information according to the sensing information corresponding to each of the detecting sections to calculate the first detecting section a difference between the sensing information and the sensing information of the third detecting section to generate a first sensing difference value; calculating the sensing information of the second detecting section and the sensing information of the fourth detecting section a difference between the second sensing difference value and the sum of the first sensing difference value and the second sensing difference value as the noise reference information. The method for detecting noise of an electronic device according to claim 2, wherein the operation modes include a first operation mode and a second operation mode, and the touch module is entered according to the noise reference information. The step of one of the operation modes includes: determining whether a noise intensity value of the noise reference information is greater than a first preset noise threshold; and determining that the noise intensity value is less than the first preset The noise threshold is such that the touch module enters the first operation mode; and if the noise intensity value is greater than the first preset noise threshold, the touch module enters the second operation mode; The touch sensing threshold in the second mode of operation is greater than the touch sensing threshold in the first mode of operation. The method for detecting noise of an electronic device according to claim 7, wherein the operation modes further include a third operation mode, and determining that the noise intensity value is greater than the first preset noise threshold After the step, the method includes: determining whether the noise strength value is greater than a second preset noise threshold, wherein the second preset noise threshold is greater than the first preset noise threshold; if the noise strength is determined The value is greater than the second preset noise threshold, so that the touch module enters the third operation mode; and if the noise strength value is determined to be smaller than the second preset noise threshold, the touch module is Entering the second mode of operation; wherein the touch sensing threshold in the third mode of operation is greater than the touch sensing threshold in the second mode of operation. The method for detecting a noise of an electronic device according to claim 8, wherein when the touch module is operated in the first operation mode, determining that the noise intensity value is greater than the first preset noise threshold After the step, the method further includes: comparing the noise reference information with the first preset noise threshold to calculate a first count value corresponding to one of the detection periods; determining that the first preset time corresponds to a plurality of times Whether the accumulated value of the plurality of first count values of the detection period is greater than a first preset threshold; if it is determined that the accumulated value of the first count values is greater than the first preset threshold, the touch mode is The group enters the second operation mode; and if it is determined that the accumulated value of the first count values is less than the first preset threshold, the touch module is maintained in the first operation mode. The method for detecting a noise of an electronic device according to claim 9, wherein the determining that the accumulated value of the first count values is greater than the first preset threshold causes the touch module to enter the second operation mode. In this step, if it is determined that the maximum value or the average value of the plurality of noise intensity values in the first preset time is less than the second preset noise threshold or the first count value The maximum or average value is less than a preset noise count threshold to make the touch The module enters the second operation mode; and if it is determined that a maximum value or an average value of the plurality of noise intensity values is greater than the second preset noise threshold or the first The maximum or average value of a count value is greater than the preset noise count threshold, so that the touch module enters the third operation mode. The method for detecting a noise of the electronic device of claim 10, wherein the step of calculating the first count value comprises: selecting the noise intensity value of the noise reference information and the first preset The ratio between the gate thresholds is calculated and the first count value is calculated. The method for detecting a noise of an electronic device according to claim 9, wherein when the touch module operates in the second operation mode or the third operation mode, determining that the noise intensity value is smaller than the first After the step of setting the threshold of the noise threshold, the method further includes: reducing the accumulated value of the first count value according to the noise intensity value of the noise reference information in a second preset time; determining the second preset Whether the accumulated value of the first count value is less than or equal to a second preset threshold value; if it is determined that the accumulated value of the first count values is less than or equal to the second preset in the second preset time The threshold is such that the touch module enters the first operation mode; and if it is determined that the integrated value of the first count value is greater than the second preset threshold within the second predetermined time, the touch module is The operation is maintained at the currently selected mode of operation. The method for detecting a noise of an electronic device according to claim 9, wherein when the touch module operates in the second operation mode or the third operation mode, determining that the noise intensity value is smaller than the first After the step of setting the threshold of the noise threshold, the method further includes: setting a second count value; and decreasing the second count value according to the noise intensity value of the noise reference information in a second preset time; Determining whether the second count value is less than or equal to a second preset threshold value in the second preset time; if it is determined that the second count value is less than or equal to the second preset valve in the second preset time a value that causes the touch module to enter the first mode of operation; and if the accumulated value of the second count value is greater than the second predetermined threshold value during the second predetermined time period, the touch module is maintained The operation mode currently selected is operated. The method for detecting a noise of an electronic device according to claim 13 , wherein the step of calculating the second count value comprises: between the first preset noise threshold and the noise intensity value Ratio, reducing the second count value. The method for detecting noise of an electronic device according to claim 1, wherein the detecting sections have the same length of time. The method for detecting noise of an electronic device according to claim 1, wherein the detection period is a sum of the driving period and an offset buffer period (offset). The method for detecting noise in an electronic device according to claim 1, wherein the length of the detecting segment is at least greater than a sampling time of any one of the sensing lines on the touch panel, wherein the sampling time refers to induction. The time at which the sensing line corresponds to at least one sensed value. The method for detecting noise of an electronic device according to claim 1, wherein the step of obtaining the sensing information of each of the detecting segments comprises: sampling each of the detecting segments to generate a plurality of sensing And calculating the sensing values in each of the detecting sections to generate the sensing information corresponding to each of the detecting sections. The method for detecting noise of an electronic device according to claim 18, wherein the sensing information is one of an average value, a least square value, a square average value, and an integral value of the sensing values. Method for setting noise detection and operation mode of electronic device, wherein the electronic device The device includes a touch panel and a display module. The touch module has a touch panel, and the touch panel is correspondingly disposed on the display module. The noise detection and mode setting method includes: And generating a noise reference information corresponding to the driving signal according to a driving signal of the display module; determining whether a noise intensity value of the noise reference information is greater than a first preset noise threshold; and determining the noise The intensity value is greater than the first preset noise threshold, so that the touch module enters a noise operation mode, wherein the touch module can detect two or less in the noise operation mode. The touch object is operated in a multi-object touch mode, wherein the touch module is in the multi-object touch mode, and the touch module is in the multi-object touch mode. The maximum number of touch objects that can be detected in the mode is greater than the maximum number of touch objects that the touch module can detect in the noise operation mode. The method for setting a noise detection and operation mode of the electronic device according to claim 20, wherein the noise operation mode has a single object touch mode and a two object touch mode, and the noise intensity value is greater than After the step of the first preset noise threshold, the method includes: determining whether the noise strength value is greater than a second preset noise threshold; and determining that the noise strength value is greater than the second predetermined noise threshold The touch module is configured to enter the single object touch mode, wherein the touch module can only detect one touch object in the single object touch mode; and if the noise intensity value is less than the The second preset noise threshold causes the touch module to enter the two object touch modes, wherein the touch module can detect two or less touches in the two object touch modes. object. The method for setting the noise detection and operation mode of the electronic device according to claim 21, wherein the touch sensing threshold value in the single object touch mode is greater than the touch sensing threshold value in the touch control mode of the two objects And in the two object touch mode The lower touch sensing threshold is greater than the touch sensing threshold in the multi-object touch mode. The method for setting a noise detection and operation mode of the electronic device according to claim 21, wherein when the touch module is operated in the multi-object touch mode, determining that the noise intensity value is greater than the first pre- After the noise threshold is set, the method includes: comparing the noise reference information with the first preset noise threshold to calculate a first count value corresponding to one of the noise reference information; determining at a first preset time Whether the accumulated value of the plurality of first count values corresponding to the plurality of detection periods is greater than a first preset threshold; if it is determined that the accumulated value of the first count values is greater than the first in the first preset time a preset threshold, the touch module is caused to enter the noise operation mode according to the noise intensity value; and if it is determined that the accumulated value of the first count values is less than the first preset in the first preset time The threshold is set to maintain the touch module in the multi-object touch mode. The method for setting a noise detection and operation mode of the electronic device according to claim 23, wherein determining that the integrated value of the first count values is greater than the first preset threshold value causes the touch module to enter the hybrid The step of the operation mode includes: determining that a maximum value or an average value of the plurality of noise intensity values is less than the second preset noise threshold or the first The maximum value or the average value of a count value is less than a preset noise count threshold value, so that the touch module enters the two object touch modes; and if the plurality of noises are determined within the first preset time The maximum value or the average value of the intensity values is greater than the second preset noise threshold or the maximum or average value of the first count values is greater than the preset noise count threshold, so that the touch mode The group enters the single object touch mode. The method for setting a noise detection and operation mode of the electronic device according to claim 24, wherein in the step of calculating the first count value, the method includes: The first count value is calculated according to a ratio between the noise intensity value and the first preset noise threshold. The method for setting the noise detection and operation mode of the electronic device according to claim 23, wherein the noise intensity is determined when the touch module operates in the touch mode of the two objects or the touch mode of the single object After the step of the value being less than the first preset noise threshold, the method further includes: reducing the accumulated value of the first count values according to the noise intensity value of the noise reference information in a second preset time; Whether the accumulated value of the first count values is less than or equal to a second preset threshold value during the second preset time; if it is determined that the accumulated value of the first count values is less than or less than the second preset time Equivalent to the second preset threshold, so that the touch module enters the multi-object touch mode; and if it is determined that the accumulated value of the first count value is greater than the second preset threshold in the second preset time The touch module is maintained to operate in the currently selected mode of operation. The method for setting the noise detection and operation mode of the electronic device according to claim 23, wherein the noise intensity is determined when the touch module operates in the touch mode of the two objects or the touch mode of the single object After the step of the value being less than the first preset noise threshold, the method further includes: setting a second count value; reducing the number according to the noise intensity value of the noise reference information in a second preset time a second count value; determining whether the second count value is less than or equal to a second preset threshold value in the second preset time; and determining that the second count value is less than or equal to the second preset time a preset threshold that causes the touch module to enter the multi-object touch mode; and if it is determined that the second count value is greater than the second pre-predetermined time The threshold is set to maintain the touch module in the currently selected mode of operation. The method for setting a noise detection and operation mode of the electronic device according to claim 27, wherein the step of calculating the second count value comprises: according to the first preset noise threshold and the noise strength The ratio between the values reduces the second count value. An electronic device includes: a display module; and a touch module, comprising: a touch panel disposed on the display module, wherein the touch panel is provided with a plurality of sensing lines; and a processing unit Electrically connecting the sensing lines, the processing unit is configured to determine a detection period of the touch panel, and scanning the sensing lines on the touch panel during the detecting period, and the processing unit is configured according to the The detection result of the sensing line generates a noise reference information, wherein the detection period is greater than or equal to a driving period of the display module; wherein the processing unit divides the detection period into a plurality of detection sections, and respectively The sensing information corresponding to each of the detecting segments is obtained, and the processing unit generates the noise reference information by performing operation on the sensing information corresponding to each of the detecting segments. The electronic device of claim 29, wherein the touch module has a plurality of operation modes, and the processing unit causes the touch module to enter one of the operation modes according to the noise reference information, wherein the The operation modes correspond to different one touch sensing thresholds. The electronic device of claim 30, wherein the operating modes include a first operating mode and a second operating mode; and when the processing unit determines that the noise strength value of the noise reference information is less than a first preset When the noise threshold is exceeded, the processing unit causes the touch module to enter the first operation mode; when the processing unit determines that the noise intensity value of the noise reference information is greater than the first preset noise threshold, The The processing unit causes the touch module to enter the second operation mode; wherein the touch sensing threshold value in the first operation mode is greater than the touch sensing threshold value in the second operation mode. The electronic device of claim 31, wherein the operation modes further include a third operation mode, and when the processing unit determines that the noise intensity value of the noise reference information is greater than the first predetermined noise threshold The processing unit further determines whether the noise strength value is greater than a second preset noise threshold; wherein, when the processing unit determines that the noise strength value is greater than the second preset noise threshold, the processing The unit causes the touch module to enter the third operation mode; wherein, when the processing unit determines that the noise intensity value is less than the second preset noise threshold, the processing unit causes the touch module to enter the first a second mode of operation; wherein the touch sensing threshold in the third mode of operation is greater than the touch sensing threshold in the second mode of operation. The electronic device of claim 29, wherein the processing unit calculates a difference between sensing information of two of the detecting segments to obtain the noise reference information. The electronic device of claim 33, wherein the two detection sections that perform the operation are separated by at least another detection section. The electronic device of claim 29, wherein the detection sections comprise a first detection section, a second detection section, a third detection section, and a fourth detection arranged in time. The processing unit calculates a difference between the sensing information of the first detecting segment and the sensing information of the third detecting segment to generate a first sensing difference value, and the processing unit calculates the first And detecting a difference between the sensing information of the detecting section and the sensing information of the fourth detecting section to generate a second sensing difference value, wherein the processing unit calculates the first sensing difference value and the second sensing difference The sum of the values to obtain the noise reference information. The electronic device of claim 29, wherein the processing unit divides the plurality of detection segments into at least one detection group, and the processing unit compares the same detection group The sensing information of the detection segment is used to obtain a comparison result corresponding to the detection group, and the processing unit calculates the comparison result of the at least one detection group to obtain the noise reference information. The detection group includes at least two detection segments. The electronic device of claim 29, wherein the detection period is a sum of the driving period and an offset buffer period. An electronic device comprising: a display module; and a touch module comprising: a touch panel disposed on the display module; and a processing unit electrically connected to the touch panel, the processing unit A noise reference information corresponding to the driving signal is generated according to a driving signal of the display module, and the processing unit determines, according to the noise reference information, an operation mode of the touch module is a multi-object touch mode or A noise operation mode, wherein the touch module detects one or more touch objects in the multi-object touch mode, and the touch module detects two or two in the noise operation mode The touch unit is configured to: when the processing unit determines that the noise intensity value of the noise reference information is less than a first preset noise threshold, the processing unit causes the touch module to enter the multi-object The touch mode; when the processing unit determines that the noise intensity value is greater than the first preset noise threshold, the processing unit causes the touch module to enter the noise operation mode. The electronic device of claim 38, wherein the noise operation mode has a single object touch mode and a two object touch mode, and the processing unit determines that the noise intensity value is greater than the first preset After the threshold is depreciated, the processing unit further determines whether the noise strength value is greater than a second preset noise threshold; when the processing unit determines that the noise strength value is greater than the second preset noise threshold, The processing unit causes the touch module to enter the single object touch mode, wherein The touch module detects only one touch object in the single object touch mode; when the noise intensity value is less than the second preset noise threshold, the touch module enters the two object touches In the control mode, the touch module detects two or less touch objects in the two object touch modes. The electronic device of claim 38, wherein when the processing unit determines that the noise intensity value is greater than the first predetermined noise threshold, setting a noise flag, and the processing unit detects the noise When the flag is flagged, the touch module is caused to enter the noise operation mode. The electronic device of claim 40, wherein the processing unit causes the touch module to operate in the multi-object touch mode when the processing unit does not detect the noise flag.