CN113377224B - Multi-mode operating method and computing device for capacitive touch panel - Google Patents

Abstract

A multi-mode operation method for a capacitive touch panel and a computing device, wherein the panel has multiple touch grids, and the sensing values of the multiple touch grids are obtained by mutual capacitance scanning. A normal mode and an insulating mode are designed for finger touch and gloved touch. The panel also includes an insulating judgment condition, which automatically judges the condition of gloved touch to enter the insulating mode. In the insulating mode, the standard for judging touch events is automatically adjusted, or the value of the sensing value or the touch coordinate is processed to accurately judge the touch effect when the panel is touched with gloves. In the insulating mode, a judgment condition for leaving the insulating mode is designed, so that the touch panel can smoothly switch between the normal mode and the insulating mode. The panel also includes other operating modes, such as a waterproof mode and an underwater mode, which can identify multiple operating modes such as normal finger touch, gloved touch, finger touch when the panel is stained with water, and judging touch when the panel is immersed in water.

Description

Multi-mode operating method and computing device for capacitive touch panel

Technical Field

The present invention relates to a multi-mode operation method of a capacitive touch panel, and in particular to a waterproof mode and insulation mode operation method of a capacitive touch panel using mutual control scanning.

Background technique

Capacitive touch panels have been widely used in various electronic or computing devices, especially electronic devices such as mobile phones, tablet computers, and notebook computers. Capacitive touch panels often face extremely different operating environments. For example, in outdoor low-temperature environments, users want to wear gloves to directly operate the touch panel. In this way, the distance between the fingers and the touch panel is greater than the thickness of the gloves. Therefore, the sensitivity of the touch panel must be improved to operate normally like finger touch. In order to handle the use status of wearing gloves, Taiwan Patent TWI511012 discloses setting a lower judgment standard and judging the signal value of adjacent cells to identify insulation touch input. Since gloves are non-conductive insulating materials, the touch method in which an insulating object such as a glove is separated between the finger and the touch panel is called insulating touch.

US patent US9,778,742 discloses setting different sensitivity parameters to scan the sensing signal value of the touch panel. In the state of increasing the sensitivity, if multiple consecutive data reaches the touch judgment standard of glove mode, the glove operation mode will be entered. Or called insulation mode, it recognizes the touch effect of wearing gloves. The problem with the above existing technology is that if the touch panel is stained with water droplets, it may be misjudged to enter the insulation mode. If the touch panel is not actually touched with gloves and the touch panel enters the insulation mode, the touch panel may be misjudged due to the increased sensitivity. For example, if it is exposed to rain outdoors, or the user wipes the screen with toilet paper dipped in water, since water also has a certain degree of conductivity, it will cause the touch panel to change the sensor signal value, and it is possible to enter the glove mode, and it is easy to accidentally touch the screen due to water droplets. Report the time.

Therefore, a more complete identification method is needed to correctly determine whether to enter the insulation mode and identify the touch effect of operating with gloves. Moreover, when the touch panel is exposed to water, it can also enter the waterproof mode to avoid false alarms due to water exposure, and can correctly identify the effect of finger touch, enabling effective judgment of touch effects in a variety of different modes. Capacitive touch panel technology.

Contents of the invention

According to the present invention, a capacitive touch panel technology is provided that can accurately determine various operation modes and effectively determine the touch effect in various operation modes.

According to the present invention, the capacitive touch panel has multiple touch grids, and the sensing values of the multiple touch grids are obtained by mutual capacitance scanning, and includes a normal mode and an insulation mode, and is determined based on the following insulation judgment conditions. Whether to enter the insulation mode: the sensing values in all touch cells are less than a normal touch threshold; there is a touch cell with a sensing value greater than an insulation touch threshold. At this time, the insulation touch threshold is the effective touch standard value. Or after the sensing value is amplified, there is a touch grid that is greater than the normal touch threshold. At this time, the normal touch threshold is the effective touch standard value, and the sensing values of the upper, lower, left and right adjacent grids of the touch grid are all Less than the sensing value of the touch grid, if it meets the above description, an insulating touch point is formed; and the insulating touch point continues to exist, and the moving distance is greater than a predetermined distance, or does not move, but disappears in a short period of time and returns to its original location. It is judged that another insulation touch point appears near the ground.

According to the present invention, when executing the insulation judgment condition, it is also limited that only one insulation touch point can exist in all touch grids, or the sensing values of all touch grids cannot be less than a lower threshold.

According to the insulation judgment condition of the present invention, when judging whether the movement distance of the insulation touch point is greater than the predetermined distance, the movement trajectory of the insulation touch point is also defined to be a back-and-forth movement or a polygonal trajectory.

According to the present invention, it further includes that before executing the insulation judgment condition, the sensing values of all touch grids are first subjected to the following processing steps: when the panel is initialized, the sensing values of each grid are obtained as the reference values of each grid; and thereafter Each time the induction value of each grid is obtained, the induction value is subtracted from the reference value of each grid, and then the insulation judgment condition is executed based on the calculated new induction value; in addition, the induction value of each grid can be subtracted from the induction value of each grid. After the base value, set a stable interval. When there is no touch event, if the calculated new sensing value is higher than the upper limit of the stable interval, a compensation value will be subtracted from the new sensing value, and the The compensation value will be added to the base value of the grid. If the calculated new sensing value is lower than the lower limit of the stable interval, the compensation value will be added to the new sensing value, and the compensation will be subtracted from the base value of the grid. value sensing value; in addition, when executing the insulation judgment condition, when there is an insulation touch point, the operation of adding or subtracting the compensation value can be suspended.

According to the present invention, in the insulation mode, the sensing values of all touch grids are amplified and then the effective touch is determined based on the normal touch threshold as the effective touch standard value, or the effective touch is determined directly based on the insulation touch threshold as the effective touch standard value; in addition, when judging whether the grid at the edge of the touch panel is effectively touched, the sensing value of the grid can be amplified, or the effective touch standard value can be reduced to judge the effective touch; in addition, it can be judged whether the grid is effectively touched based on the sensing values of the upper, lower, left and right adjacent grids of the grid whose sensing values are greater than the effective touch standard value.

According to the content of the present invention, after the effective touch point is determined in the insulation mode, based on the sensing grid whose sensing value is greater than the effective touch standard value, an area whose sensing value is greater than a sensing range standard value is found, and based on this area The touch coordinates are calculated using the sensing values of all sensing grids; in addition, methods such as enhanced filtering, averaging, stabilization processing, or speed reduction processing can be used to make the coordinates more stable.

According to the present invention, in the isolation mode, if no touch event occurs within a retention time, the isolation mode is left and returned to the normal mode.

According to the present invention, in the isolation mode, if the induction value in all touch cells is greater than a normal induction standard value, the insulation mode is left; in addition, if the insulation mode is left due to the aforementioned condition, then when the touch panel is touched, the insulation mode is left. If the touch event disappears or the sensing values of all touch cells are less than a recovery insulation standard value, there is no need to execute the aforementioned touch judgment conditions and directly enter the isolation mode.

According to the content of the present invention, other operation modes are also included. The touch panel is initially in a normal mode and can enter the insulation mode or other operation modes respectively according to the insulation judgment condition or the conditions of the other operation modes.

According to the content of the present invention, it also includes an insulating switch. When the insulating switch is closed, it is limited to entering only the normal mode or the other operation mode. When the insulating switch is opened, it can be set to enter the normal mode, the insulating mode or the other operation mode, or it is limited to entering only the normal mode or the insulating mode. In addition, when it is set that only the normal mode or the insulating mode can be entered, the aforementioned insulation judgment condition does not need to be executed, and the operation method in the aforementioned insulation mode can be directly used to judge the touch effect.

According to the content of the present invention, the other operation mode is a waterproof mode, and also includes an underwater mode. The touch panel is initially in a normal mode, and can be configured according to the insulation judgment condition, a waterproof judgment condition or an underwater judgment condition, respectively. Enter the insulation mode, the waterproof mode or the underwater mode; in addition, when entering the insulation mode or waterproof mode, you can also enter the underwater mode according to the underwater judgment conditions; in addition, when entering the underwater mode, you can limit entering the waterproof mode when leaving the underwater mode.

The invention discloses a computing device, which includes a central processing unit, a touch panel for allowing a user to operate in a touch mode, and a controller that communicates with the touch panel and the central processing unit, or has The function of determining the touch effect is performed based on the touch sensing value; wherein, the central processing unit and the controller cooperate to perform the operation method in the present invention.

According to the present invention, the touch effects of touch panel touch with fingers, touch touch with gloves, and touch effects when liquid adheres to the touch panel can be distinguished. Compared with the existing technology, the touch panel has a relatively high effective touch recognition capability.

Description of drawings

Figure 1 is a schematic view showing a mutual capacitance touch panel;

Figures 2A and 2B respectively show examples of the sensing values of each grid when a normal finger touches the panel and the sensing values of each grid when the center of the touch panel is touched with gloves;

Figure 3 is a flow chart for illustrating insulation judgment conditions according to the first embodiment of the present invention;

4 is a flow chart for illustrating insulation determination conditions according to a second embodiment of the present invention;

Figures 5A and 5B respectively show examples illustrating the sensing value sampling range used to calculate touch coordinates in normal mode, and the sensing value sampling range used to calculate touch coordinates in isolation mode;

Figure 6 is used to illustrate the state diagram of the touch panel including normal mode, insulation mode and waterproof mode;

Figure 7 is used to illustrate the state diagram of the touch panel including normal mode, insulation mode and waterproof mode, and the optional usage methods when it also includes the setting of the insulation switch;

Figure 8 is used to illustrate the state diagram of the touch panel including normal mode, insulation mode, waterproof mode and underwater mode; and

Figure 9 is a block diagram showing a computing device according to an embodiment.

Explanation of reference signs: 500-computing device; 502-touch panel; 504-controller; 506-central processing unit.

Detailed ways

In order to help understand the spirit and principle of the present invention, the arrangement and sensing method of the capacitive touch panel will be briefly described. Referring to FIG. 1 , the touch panel 100 is provided with N columns and M rows of scan lines. In this specification, the area between two adjacent rows and two adjacent columns is called a grid, and the entire touch panel is called a frame. Generally speaking, a capacitive touch panel generates an induced electric field on the surface of the panel to obtain an equivalent capacitance value. When a finger touches it, the intensity of the induced electric field changes and the equivalent capacitance value also changes. Generally speaking, the magnitude of the change is about pF (10 ^-12 Farads), the signal thus obtained will be converted into a digital signal by a device such as an analog-to-digital converter, and undergo other processing to generate corresponding values for use in performing different processes or operations. Generally speaking, there are two main scanning methods for scanning a touch panel to obtain sensing values. One is self-capacitance scanning and the other is mutual capacitance scanning. The present invention mainly uses mutual capacitance scanning to obtain sensing values.

Here, the capacitance sensing value of the capacitive touch panel under the induced electric field is called the original data. Under different environmental conditions such as foreign object touch or attachment, the capacitance sensing value will also be different. The original data obtained under the initial condition without being touched or contacted by foreign objects is referred to as the reference value below. The original value is obtained when the finger touches the capacitive touch panel. The difference between the original value and the reference value is the change value caused by the finger touch, that is, the difference value = original value - reference value. For example, Figure 2A shows the change value of each grid when the finger touches under normal circumstances, that is, the values shown in the figure are all difference values. As shown in Figure 2A, the value of the grid with a value of 1197 and its surrounding grids is significantly larger than that of other grids, and is therefore regarded as a finger touch. Below, the change value will be referred to as the sensing value.

Figure 2B shows the sensing values of each grid when touching with gloves with a thickness of 3mm. Compared with touching with gloves and touching directly with fingers, the distance between the fingers and the touch panel is greater than the thickness of the gloves, and the intensity of the induced electric field is inversely proportional to the distance between the sensing objects, so the induction generated when touching with gloves The value will be smaller than the sensing value of direct finger touch. The grid with the largest sensing value in Figure 2B has a sensing value of only 138, which is 10 times faster than the maximum sensing value of 1197 when touched with a finger as shown in Figure 2A. If the sensing value when touching with fingers is fixed as the judgment standard, then the sensing value when touching with gloves is too small and the sensitivity is too low to be recognized. If the sensing value when touching with gloves is fixed as the judging criterion, the sensing value when touching with fingers will If it is too large and the sensitivity is too high, a touch reaction will occur just when the finger is close to the touch panel, or it may be easily interfered by noise and cause misjudgment. Therefore, the present invention designs two operating modes for the touch panel. When touched by fingers, it is in the normal mode. When touched by wearing gloves, it enters the insulation mode. In these two modes, there will be different touch judgment standards to avoid too high or too high sensitivity. low question.

FIG. 3 is a flow chart of the first embodiment, illustrating the judgment conditions for deciding to enter the isolation mode according to the present invention. In the normal mode, using the maximum finger touch sensing value 1197 shown in FIG. 2A as the reference standard, and setting the normal touch threshold to 400 in step S30, the touch effect of the finger touch can be normally judged. Step S31 is for the case of touching with gloves. The first judgment condition is: whether the sensing values of all touch grids are less than the normal touch threshold, which is set to 400 in this embodiment. If the determination in step S31 is no, the process proceeds to step S36, and the touch panel remains in the normal mode. Otherwise, the process proceeds to the next step S32 to perform the second judgment condition, that is, whether there is a touch grid with a sensing value greater than an insulating touch threshold, or after amplification of the sensing value, there is a touch grid greater than the normal touch threshold. In step S32, using the maximum sensing value of 138 when wearing gloves as shown in Figure 2B as the reference standard, the insulation touch threshold is set to 90. As long as the insulation touch threshold is regarded as the effective touch standard value, it can be determined whether the gloves are worn or not. Condition of glove touch panel. Or first amplify the sensing value by a fixed magnification. In this embodiment, since the maximum sensing value for touch with gloves is only 138, which is 10 times faster than the maximum sensing value for finger touch, 1197, the sensing value is first amplified 10 times. The amplified sensing value If there is a touch grid with a value greater than the normal touch threshold, the normal touch threshold is the effective touch standard value, and it can also be used to determine whether the panel is touched while wearing gloves. After finding a touch cell whose sensing value is greater than the effective touch standard value, it is then determined whether the sensing values of the upper, lower, left and right adjacent cells of the touch cell are smaller than the sensing value of the touch cell. If the above description is met, it is determined that an insulating touch point is formed in step S33. Otherwise, step S36 is entered and the touch panel remains in the normal mode.

If you only follow the above two conditions and directly determine that there is a touch with gloves and then enter the insulation mode to judge the touch effect, it is easy to cause misjudgment. For example, if the finger is still a little distance from the touch panel, a slight change in the sensing value will result. Enter isolation mode, or enter isolation mode when disturbed by noise. Therefore, a third judgment condition is added in step S34 to judge whether the following two conditions are met. Situation 1: The insulating touch point continues to exist, and the moving distance is greater than a predetermined distance, or Situation 2: The insulating touch point does not move, but disappears in a short period of time and another insulating touch point appears near the original location, as long as If one of the conditions is met, the third judgment condition is met. In practical applications, these two situations usually do not occur at the same time, so you can judge only situation 1, only situation 2, or both situations. As long as one of the conditions is met, the third judgment condition is met. After satisfying the first to third judgment conditions, in step S35, the touch panel enters the isolation mode.

In step S34, the third judgment condition mentioned above, wherein the predetermined distance is set, is used to: when touching with gloves, it is necessary to slide a predetermined distance to confirm that it is a situation of touching with gloves, so as to avoid entering the insulation mode due to noise interference. As for the predetermined distance, it is not necessary to calculate very accurately. For example, the moving distance is greater than the distance of 6 touch grids to be determined to meet the predetermined distance. As for the description of "the insulating touch point does not move, but disappears in a short time and another insulating touch point is judged to appear near the original place", it is for the situation described by clicking twice in the original place. Among them, the "short time" can be set to less than 1 second. After touching the touch panel, lifting and pressing within 1 second is regarded as 2 consecutive clicks. As for the description of "near the original place", the positions of the two clicks can be on the same grid, or an error of 1 grid or 2 touch grid distances can be allowed. If the grid is used as the recognition standard, at least 1 grid error must be allowed, because if the first click is just in the middle of two grids, the position of the second click will be 1 grid off if it is slightly off, and it cannot be judged.

According to the above-mentioned first embodiment, a judgment condition may be further included. When the insulation judgment condition is executed, it is limited that only one insulating touch point can exist in all touch grids, or the sensing values of all touch grids cannot Less than the lower threshold. FIG. 4 is a flowchart of a second embodiment integrating the above determination conditions, so step S44 is added. If there are two fingers touching with gloves in normal mode, resulting in two insulation touch points, the insulation judgment conditions will not be met and the insulation mode will not be entered. In addition, if the touch panel is exposed to water or is interfered by noise and produces a negative induction value, it will not meet the insulation judgment conditions, so it will not enter the insulation mode, but will go to step S47 to leave the touch panel in Normal mode. As for the value of the lower threshold, it can be set according to the characteristics of the touch panel and the size of the noise. For example, if the touch panel is interfered by general noise and there is no contact, the sensing value will fluctuate between plus and minus 20, so The lower limit threshold can be set to minus 40. Under normal conditions, there is still a chance to meet the insulation judgment conditions. If the minimum induction value is lower than minus 40 due to abnormal interference such as being exposed to water, the insulation judgment conditions will not be met.

According to the above-mentioned second embodiment, the judgment condition of "the insulating touch point continues to exist and the moving distance is greater than a predetermined distance" further defines the movement trajectory of the insulating touch point to be a back-and-forth movement or a polygonal trajectory. If only the movement distance is used as the judgment condition, when a drop of water slides on the panel, or the user wipes the panel with toilet paper dipped in water, the insulation judgment condition may be met and a misjudgment may result. Therefore, the movement trajectory of the insulating touch point is further limited to avoid misjudgment of usage conditions. The description of "moving back and forth" does not necessarily return to the original coordinates of the starting point of the touch. For example, if you continue to observe that the touch coordinates are greater than 5 touch grids away from the starting point, and then return to a distance less than 2 touch grids away from the starting point, It can be regarded as moving back and forth, or the same concept can be used to determine the movement trajectory of the polygon to avoid misjudgment.

According to an embodiment of the present invention, before executing the insulation judgment condition, the sensing values of all touch grids can first undergo the following processing steps: when the touch panel is initialized, the sensing values of each grid are obtained as the reference for each grid. value, and then obtain the induction value of each cell each time, subtract the reference value of each cell from the induction value, and then execute the insulation judgment condition based on the calculated new induction value. For example, the initial base value obtained for a certain sensing grid is 3000. After that, 3000 will be deducted each time the sensing value is obtained for subsequent judgment processing. If the induction value obtained later is 3100, the new induction value is 3100–3000=100, and the insulation judgment condition is executed based on the calculated new induction value.

According to an embodiment of the present invention, after subtracting the reference value of each grid from the sensing value of each grid, a stable interval is set. When there is no touch event, if the calculated new sensing value is higher than the upper limit of the stable interval, a compensation value is subtracted from the new sensing value, and the reference value of the grid is added with the compensation value. If the calculated new sensing value is lower than the lower limit of the stable interval, the compensation value is added to the new sensing value, and the reference value of the grid is subtracted from the sensing value of the compensation value. As for the upper limit and lower limit of the stable interval, they can be set according to the characteristics of the touch panel and the size of the noise. For example, when the touch panel is not in any contact and is disturbed by basic noise, the sensing value varies between positive and negative 20. In this way, the upper limit and lower limit of the stable interval can be set to 30 and negative 30, and the compensation value is set to 6. When there is no touch event, if the calculated new sensing value is 35, which is greater than the upper limit of the stable interval of 30, the new sensing value will be subtracted from the compensation value of 6, leaving 29, and the base value of the grid will be added with the compensation value, so that the new sensing value after deducting the base value next time will also be 29, so that the new sensing value remains within the stable interval.

According to an embodiment of the present invention, when executing the insulation judgment condition, when there is an insulation touch point, the operation of adding or subtracting the compensation value can be suspended. This is because when touching with gloves, the sensing value is much smaller than touching with fingers. When executing the insulation judgment condition, if the calculation of adding or subtracting the compensation value is continued, the sensing value may be maintained within the stable range. Even if you touch it with gloves, the sensing value cannot be greater than the effective touch standard value. If it cannot meet the insulation judgment conditions, it cannot enter the insulation mode. Therefore, when executing the insulation judgment condition, when there is an insulation touch point, the operation of adding or subtracting the compensation value can be suspended to avoid the situation in which the insulation judgment condition cannot be met.

According to the embodiment of the present invention, the above-mentioned insulation judgment condition serves as a basis for judging whether to enter the insulation mode when the touch panel is in the normal mode. Next, the judgment of the touch effect when the touch panel is in the insulation mode will be described. Methods. In the isolation mode, the sensing values of all touch grids can be amplified first, and then the effective touch can be determined based on the normal touch threshold as the effective touch standard value, or the effective touch can be determined directly based on the insulation touch threshold as the effective touch standard value. For example, according to the above data, the sensing value of finger touch is 10 times that of wearing gloves. Therefore, in the insulation mode, the sensing value is amplified 10 times, and then the normal touch threshold of 400 is used as the effective touch standard value to judge. Effective touch, or directly judging the effective touch based on the aforementioned insulation touch threshold 90 as the effective touch standard value.

The above-mentioned method of judging the touch effect in the insulation mode, in addition, when judging whether the sensing grid on the edge of the touch panel is effectively touched, the sensing value of the grid can also be enlarged, or the effective touch standard value can be reduced to determine the effective touch. This is due to the characteristics of the touch panel. The sensing value of the sensing grid on the edge of the panel is usually smaller than the sensing value of the sensing grid in the center of the panel. Therefore, the touch judgment criteria are relaxed for the edge of the panel to avoid failure to respond when touching the edge of the panel with gloves. .

According to embodiments of the present invention, the above-mentioned method of determining the touch effect in the isolation mode can further determine the sensing value of the upper, lower, left and right adjacent cells of the cell whose sensing value is greater than the effective touch standard value. Whether the grid is effectively touched. This is because when touching with gloves, there is usually a sufficient contact area. Therefore, the judgment standard can be set for the sensing values of the upper, lower, left and right adjacent cells of the cell whose sensing value is greater than the effective touch standard value, for example The sensing value of the adjacent cells must be greater than a certain standard value, or the sum of the sensing values of the adjacent cells must be greater than another standard value, in order to be considered a valid touch.

According to embodiments of the present invention, after determining the effective touch point in the isolation mode, based on the sensing grid whose sensing value is greater than the effective touch standard value, find an area where the sensing value is greater than a sensing range standard value, and based on this area Calculate the touch coordinates based on the sensing values of all sensing grids in the screen. As shown in Figure 5A, for general finger touch, the touch coordinates can be calculated by taking the sensing value within the nine-square grid at the touch center; however, as shown in Figure 5B, due to the large contact area when touching with gloves, only taking The calculation of the induction value of the nine-square grid range is not enough, and there will be many grids close to the maximum value. The range of the nine-square grid is also prone to instability. For example, the maximum induction value in Figure 5B is 138, and the induction value of the right induction grid is 132. If there is noise, let When 132 becomes 139, it will replace 138 as the new maximum value. Take the range of the nine-square grid and directly translate it one grid to the right. The calculation result of the touch coordinates is prone to jitter due to this. Therefore, it is better to draw out the sensing range and then calculate the coordinates. For example, find the area where the sensing value is greater than 60 (the standard value of the sensing range). The sensing values of the total 14 sensing grids in this area are used to calculate the coordinates. The calculation result of the touch coordinates relatively stable.

According to the above method of calculating touch coordinates, methods such as enhanced filtering, averaging, stabilization processing or speed reduction processing can be used to make the coordinates more stable. Among them, filtering can be based on the sensing value of each touch grid, storing the data of the previous sensing values, and filtering the current sensing value, or for the value of the touch coordinates, storing the values of the previous touching coordinates, and the current sensing value. The value of the touch coordinate is filtered. Average is directly averaged with the values of the previous data, and can be averaged for the sensing value of each touch grid or the value of the touch coordinates. As for the stabilization process, please refer to the stabilization processor of Taiwan Patent No. 108117369. The basic principle is that when the value suddenly changes drastically, the concept of reducing the change amount to stabilize the output value can be based on the sensing value of each touch grid or the touch coordinates. The values are stabilized. Slowing down processing is to reduce the reporting rate. For example, in normal mode, 100 touch coordinates can be calculated and output per second. In isolation mode, because it is more susceptible to noise interference, 50 touch coordinates can be calculated and output per second. coordinates to reduce noise interference.

The above describes the method for determining whether to enter the isolation mode when the touch panel of the present invention is in the normal mode, and the method for determining the touch effect in the isolation mode. Next, the method of determining whether it is necessary to return to normal mode in isolation mode is described. In the isolation mode, if no touch event occurs within a retention time, the isolation mode is exited. The retention time can be set to 3 seconds, so that in the insulation mode, if the touch panel is not touched with fingers or gloves within 3 seconds, it will automatically leave the insulation mode and return to the normal mode.

The touch panel of the present invention leaves the insulation mode if the sensing value in all the touch grids is greater than a normal sensing standard value. The insulation mode is designed for users wearing gloves to touch, so the sensing value is smaller than that of finger touch. As shown in FIG5B , the maximum sensing value is only 138. If it is greater than the normal sensing standard value of 400, it is determined that the user is directly touching the touch panel with a finger, so the insulation mode will be automatically left and returned to the normal mode.

When the touch panel of the present invention is in the insulation mode, if it leaves the insulation mode because "the sensing values in all touch cells are greater than a normal sensing standard value", then when the touch event disappears or the sensing values of all the touch cells are If the value is less than one restoration insulation standard value, the aforementioned touch judgment conditions are not required and the insulation mode is entered directly. The effect of this design is: if you enter the insulation mode and return to the normal mode due to the judgment of finger touch, you can automatically return to the insulation mode the moment your finger is lifted. At this time, whether you are touching the touch panel with your fingers or wearing gloves, you can directly touch the touch panel. operate. If the insulation mode is not returned at this time, the insulation judgment condition must be passed every time the glove is worn before the glove mode can be entered, which is inconvenient for the user. In addition, the recovery insulation standard value can also be set as the judgment standard, wherein the recovery insulation standard value can be equal to the normal induction standard value 400, or less than the normal induction standard value, creating a buffer interval to avoid frequent switching between the normal mode and the insulation mode. switch between, but must be at least greater than the insulation touch threshold 90.

The aforementioned touch panel includes a normal mode and an insulation mode, and may also include other operation modes. The touch panel is initially in a normal mode and can enter the insulation mode or other modes respectively based on the insulation judgment conditions or conditions of other operation modes. operating mode. The present invention may further include a waterproof mode, allowing the touch panel to switch between normal mode, insulation mode and waterproof mode, as shown in Figure 6 . As for the method of judging entering and leaving the waterproof mode, and the method of judging the touch effect in the waterproof mode, please refer to the content of Taiwan Patent 108141417.

The aforementioned touch panel including other operation modes also includes an insulation switch. When the insulation switch is closed, it is limited to enter only the normal mode or the other operation mode, and will not enter the insulation mode, so there is no need to execute the aforementioned insulation judgment condition. When the insulation switch is turned on, it can be set to enter the normal mode, insulation mode or waterproof mode, or it can be limited to enter the normal mode or insulation mode, as shown in Figure 7. This includes three selection methods for users, which are described as follows. The first selection method of the above-mentioned insulation switch is: the insulation switch remains in the open state, and the touch panel maintains the state of being able to enter the normal mode, insulation mode or waterproof mode. The second selection method of the above-mentioned insulation switch is: when the insulation switch is turned on, the touch panel can enter the normal mode, insulation mode or waterproof mode. When the insulation switch is turned off, the touch panel can only enter the normal mode or waterproof mode. The third selection method of the above-mentioned insulation switch is: when the insulation switch is turned on, the touch panel can only enter the normal mode or insulation mode. When the insulation switch is turned off, the touch panel can only enter the normal mode or waterproof mode.

When the above-mentioned insulation switch is set to only enter the normal mode or the insulation mode, it is not necessary to execute the aforementioned insulation judgment condition, and the aforementioned operation method in the insulation mode can be directly used to judge the touch effect.

The aforementioned touch panel including other operating modes also includes an underwater mode, as shown in Figure 8. The touch panel is initially in a normal mode and can enter the insulation mode, the waterproof mode or the underwater mode respectively according to the insulation judgment condition, a waterproof judgment condition or an underwater judgment condition. In addition, when entering the insulation mode or waterproof mode, you can also enter the underwater mode according to the underwater judgment conditions; in addition, when entering the underwater mode, you can limit the entry into the waterproof mode when leaving the underwater mode. For descriptions of the in-water mode, the in-water judgment conditions, and the method of judging the out-of-water mode, please refer to Taiwan Patent 108141417.

When devices including processing units, memory, and touch panels implement the above technologies, they can be implemented in hardware, software, or a combination of both.

FIG9 is a block diagram showing a computing device 500 according to an embodiment. As shown in the figure, the computing device 500 includes a touch panel 502, a controller 504, and a central processing unit 506. The touch panel 502 is used for displaying and allowing the user to operate in a touch manner. The controller 504 can obtain an input signal from the touch panel 502, and can cooperate with the central processing unit 506 to execute at least one of the above-mentioned multiple modes according to the present invention based on the input signal. The computing device 500 can perform the waterproof mode processing and/or the insulation mode processing according to the present invention, and has a high touch point accuracy.

Although preferred embodiments of the present invention have been described above, these are for illustrative purposes only and should not be construed as limiting the scope of the present invention. Those skilled in the art will appreciate this without departing from the spirit of the present invention. Many modifications may be made, and the present claims cover all such modifications as fall within the scope and spirit of the invention.

Claims (11)

1. A multi-mode operation method for a capacitive touch panel is characterized in that the touch panel is provided with a plurality of touch cells, the sensing values of the touch cells are obtained in a mutual capacitance scanning mode, the touch panel comprises a normal mode and an insulation mode, and whether the touch panel enters the insulation mode is determined according to the following insulation judging conditions:

the sensing values in all the touch cells are smaller than a normal touch threshold;

the method comprises the steps that a touch cell with an induction value larger than an insulation touch threshold value exists, the insulation touch threshold value is an effective touch standard value at the moment, or after the induction value is amplified, the touch cell with the induction value larger than a normal touch threshold value exists, the normal touch threshold value is an effective touch standard value at the moment, the induction values of the upper, lower, left and right adjacent cells of the touch cell are smaller than the induction values of the touch cell, and an insulation touch point is formed if the induction values are consistent with the induction values; the insulated touch point is continuously present, and the moving distance is greater than a predetermined distance, or is not moved, but disappears in a short time and another insulated touch point is judged to appear in the vicinity of the place,

before the insulation judgment condition is executed, the sensing values of all the touch cells are processed by the following steps:

the method comprises the steps of obtaining induction values of each cell as reference values of each cell when the panel is initially arranged; and then obtaining the induction value of each cell each time, subtracting the reference value of each cell from the induction value, and executing the insulation judgment condition according to the calculated new induction value;

in addition, after subtracting the reference value of each cell from the sensing value of each cell, setting a stable section, when no touch event exists, subtracting a compensation value from the new sensing value if the calculated new sensing value is higher than the upper limit value of the stable section, and adding the compensation value to the reference value of the cell, adding the compensation value to the new sensing value if the calculated new sensing value is lower than the lower limit value of the stable section, and subtracting the compensation value from the reference value of the cell;

in addition, when the insulation judgment condition is executed, the operation of adding or subtracting the compensation value is suspended when the insulation touch point exists.

2. The method of claim 1, further comprising defining that only one insulated touch point exists in all the touch cells or that the sensing value of all the touch cells cannot be less than a lower threshold when the insulation determination condition is performed.

3. The method of claim 1, further comprising determining whether the distance of movement of the insulated touch point is greater than the predetermined distance, and defining the trajectory of movement of the insulated touch point to be a back and forth movement or a polygonal trajectory.

4. The method of claim 1, wherein the sensing values of all the touch cells are amplified in the insulation mode and then the effective touch is determined according to the normal touch threshold as an effective touch standard value, or the effective touch is determined directly according to the insulation touch threshold as an effective touch standard value; in addition, when judging whether the cell at the edge of the touch panel is in effective touch, amplifying the sensing value of the cell or reducing the effective touch standard value to judge effective touch; and judging whether the cell is effectively touched according to the induction values of the upper, lower, left and right adjacent cells of which the induction values are larger than the effective touch standard value.

5. The method of claim 1, wherein after the effective touch point is determined in the insulation mode, a region with an induction value greater than a standard value of an induction range is found out according to the induction cells with the induction value greater than the standard value of the effective touch point, and touch coordinates are calculated according to the induction values of all the induction cells in the region; in addition, the method of strengthening filtering, averaging, stabilizing or slowing down is used to make the coordinates more stable.

6. The method of claim 1, wherein in the insulating mode, if no touch events occur during a hold time, exiting the insulating mode.

7. The method of claim 1, wherein,

(1) In the insulation mode, if the sensing value in all the touch cells is larger than a normal sensing standard value, the insulation mode is left;

(2) If the insulating mode is left due to the above (1), and then when the touch event disappears or the sensing values of all the touch cells are smaller than a recovered insulating standard value, the insulating judgment condition of claim 1 is not needed, and the insulating mode is directly entered.

8. The method of claim 1, further comprising an additional operation mode, wherein the touch panel is initially in a normal mode, and the insulation mode or the additional operation mode is entered according to the insulation determination condition or the additional operation mode, respectively.

9. The method of claim 8, further comprising an insulating switch defining only a normal mode or the other mode of operation when the insulating switch is off, and setting to the normal mode, the insulating mode or the other mode of operation when the insulating switch is on, or defining only the normal mode or the insulating mode.

10. The method of claim 8, wherein the other operation mode is a waterproof mode, and further comprising an in-water mode, wherein the touch panel is initially in a normal mode, and enters the insulation mode, the waterproof mode or the in-water mode according to the insulation judgment condition, the waterproof judgment condition or the in-water judgment condition, respectively; in addition, when the water-proof device enters an insulation mode or a water-proof mode, the water-proof device can also enter the water-proof mode according to the water judgment condition; in addition, when entering the underwater mode, the water-proof mode can be limited when leaving the underwater mode.

11. A computing device, comprising:

a central processing unit;

a touch panel for allowing a user to operate in a touch manner; and

the controller is communicated with the touch panel and the central processing unit or has the function of judging the touch effect according to the touch sensing value;

wherein the central processing unit and the controller operate in tandem to perform the method of any one of claims 1 to 10.