JP4098314B2 - Capacitive touch panel multiple article detection method - Google Patents

Description

  The present invention relates to a method for detecting a plurality of articles on a kind of capacitive touch panel, and more particularly to a method for detecting a plurality of articles for preventing noise.

  A capacitive touch panel is an input device that controls cursor movement by sliding a finger on a smooth panel. Capacitive touch panels are very thin and therefore can be designed in ultra-thin notebook computers, keyboards, digital players or other devices, and are not mechanical designs, so maintenance Very simple.

  FIG. 1 illustrates a known two-dimensional capacitive touch panel 100 that includes a panel 102, a Y-axis sensitive layer 104, an insulating layer 106, an X-axis sensitive layer 108 and a bottom plate 110. When the finger 112 is brought into contact with the panel 102, the sensitivity (capacitance) at the contact position is modified, and the control circuit connected to the touch panel 100 converts the capacitance on the touch panel into the sensitivity, and FIG. As shown, the finger position, amount of movement, and direction of movement are determined. In the well-known technique, whether or not an article touches the capacitive touch panel 100 is based on the magnitude of the detected sensitivity amount, and the sensitivity amount is a threshold value th as shown in FIG. When it is larger, it indicates that the article has touched the touch panel 100, and conversely, when the sensitivity amount is smaller than the threshold value th, it indicates that the article is separated from the touch panel 100 or there is no article on the touch panel 100.

  However, the touch panel 100 generates noise due to the interference of a wireless device signal such as a mobile phone. For this reason, the touch panel 100 misidentifies that an article is touching, clicking, moving, or performing other manual operations on the touch panel 100. Sometimes. FIG. 4 shows noise generated on the touch panel 100, and this noise is analog-digital converted to obtain a sensitivity amount, as shown in FIG. 5, and then further sampled to obtain the waveform of FIG. Such a waveform is similar to the waveform generated when two fingers touch the touch panel 100 as shown in FIG. 7, so that the noise shown in FIG. An operation can be formed.

  An object of the present invention is to provide a method for detecting a plurality of articles of a kind of capacitive touch panel, which is a method capable of preventing noise interference.

The invention of claim 1 is a method for detecting a plurality of articles of a capacitive touch panel,
Detecting a sensitivity amount of the touch panel to obtain at least a first peak value and a second peak value;
Calculating the amount of change in the amount of sensitivity when the first peak value and the second peak value are both greater than the threshold value;
A plurality of articles of a capacitive touch panel, wherein if the amount of sensitivity maintains an increasing tendency within a set time, it is displayed that at least two articles are in contact with the touch panel. It is a detection method.
The invention of claim 2 is the method for detecting a plurality of articles of the capacitive touch panel according to claim 1,
Calculating the number of articles in contact with the touch panel;
Calculating a contact time of the at least two articles with respect to the touch panel;
Sending a contact signal when the contact time reaches a second set time;
Among them, in the contact time calculation, the number of articles on the touch panel is maintained and unchanged, and this is a method for detecting a plurality of articles on a capacitive touch panel.
The invention according to claim 3 is the method for detecting a plurality of articles of the capacitive touch panel according to claim 2, further comprising the step of calculating the positions of the at least two articles and transmitting a position signal. This is a method for detecting a plurality of articles of a capacitive touch panel.
The invention of claim 4 is a method for detecting a plurality of articles of a capacitive touch panel,
Confirming contact of the touch panel with at least two items;
Measuring the amount of sensitivity of the touch panel to obtain at least a first peak value and a second peak value;
Calculating at least one of the first peak value and the second peak value when the sensitivity value is smaller than the threshold value;
If the first or second peak value smaller than the threshold value maintains a decreasing tendency within the set time, at least one of at least two articles indicates that the touch panel is separated from the touch panel. It is set as the multiple article detection method of an electrostatic capacitance type touch panel.
According to a fifth aspect of the present invention, in the method for detecting a plurality of articles of the capacitive touch panel according to the fourth aspect, the step of confirming contact of at least two articles with the touch panel includes:
Measuring a sensitivity amount and obtaining at least a first peak value and a second peak value;
Calculating the amount of change in the sensitivity when the first and second peak values are both greater than the threshold value;
A plurality of articles of a capacitive touch panel, wherein if the amount of sensitivity is within the second set time and maintains a tendency to increase, at least two articles show contact with the touch panel It is a detection method.
The invention of claim 6 is the method of detecting a plurality of articles of the capacitive touch panel according to claim 4,
Calculating a separation time of the at least one article from the touch panel;
Sending a separation signal when the separation time exceeds a second set time;
Calculating the number of articles that remain on the touch panel;
A plurality of capacitive touch panels, wherein when the number of articles retained on the touch panel is not zero, the position of the articles retained on the touch panel is calculated and a position signal is transmitted. This is an article detection method.
The invention of claim 7 is a method for detecting a plurality of articles of a capacitive touch panel,
Confirming contact of the touch panel with at least two items;
Calculating a contact time of the at least two articles with respect to the touch panel;
If the contact time is smaller than the first set time, confirming separation of all articles from the touch panel;
Calculating the separation time of all articles from the touch panel;
Sending the tap signal if the separation time is greater than the second set time;
Among them, in the contact time calculation, the number of articles on the touch panel is maintained unchanged.
The invention of claim 8 is the method of detecting a plurality of articles of the capacitive touch panel according to claim 7, wherein the step of confirming the contact of the at least two articles with the touch panel comprises:
Measuring the sensitivity of the touch panel to obtain at least a first peak value and a second peak value;
Calculating the amount of change in the sensitivity when the first and second peak values are both greater than the threshold value;
A plurality of articles of a capacitive touch panel, wherein if the amount of sensitivity is within the second set time and maintains a tendency to increase, at least two articles show contact with the touch panel It is a detection method.
The invention according to claim 9 is the method for detecting a plurality of articles of the capacitive touch panel according to claim 8, further comprising the step of calculating positions on the touch panel of at least two articles and transmitting a position signal. It is set as the multiple article detection method of an electrostatic capacitance type touch panel.
The invention of claim 10 is the method for detecting a plurality of articles of the capacitive touch panel according to claim 7, wherein the step of confirming the separation of all articles from the touch panel comprises:
Measuring the amount of sensitivity of the touch panel to obtain at least a first peak value and a second peak value;
Calculating the amount of change in the sensitivity when the first peak value and the second peak value are both smaller than the threshold value;
And a method for detecting a plurality of articles of a capacitive touch panel, wherein if the amount of sensitivity maintains a decreasing tendency within a second set time, at least two articles are separated from the touch panel. It is said.
The invention of claim 11 is a method for detecting a plurality of articles of a capacitive touch panel,
Confirming contact of the touch panel with at least two items;
Calculating the number of articles in contact with the touch panel;
Calculating a first contact time of the at least two articles with respect to the touch panel; and confirming separation of the at least two articles from the touch panel if the first contact time is less than a first set time;
Calculating a separation time of the at least two articles from the touch panel;
If the separation time is less than the second set time, confirming contact of the at least two articles with the touch panel;
Calculating a second contact time for the touch panel of the at least two articles;
If the second contact time is less than a third set time, confirming separation of the at least two articles from the touch panel;
Sending a double tap signal;
Among them, in the first and second contact time calculations, the number of articles on the touch panel is maintained unchanged.
The invention of claim 12 is the method for detecting a plurality of articles of the capacitive touch panel according to claim 11, wherein the step of confirming contact of the at least two articles with respect to the touch panel comprises:
Measuring the sensitivity of the touch panel to obtain at least a first peak value and a second peak value;
Calculating the amount of change in the sensitivity when the first and second peak values are both greater than the threshold value;
A plurality of articles of a capacitive touch panel, wherein if the amount of sensitivity is within the fourth set time and maintains a tendency to increase, at least two articles show contact with the touch panel It is a detection method.
According to a thirteenth aspect of the invention, in the method for detecting a plurality of articles of the capacitive touch panel according to the eleventh aspect, the step of confirming separation of at least two articles from the touch panel includes
Measuring the amount of sensitivity of the touch panel to obtain at least a first peak value and a second peak value;
Calculating the amount of change in the sensitivity when the first peak value and the second peak value are both smaller than the threshold value;
And a method for detecting a plurality of articles of a capacitive touch panel, in which at least two articles are separated from the touch panel if the amount of sensitivity maintains a decreasing tendency within the fourth set time. It is said.
The invention of claim 14 is the method of detecting a plurality of articles of the capacitive touch panel according to claim 11, further comprising the step of calculating positions on the touch panel of at least two articles and transmitting a position signal. It is set as the multiple article detection method of an electrostatic capacitance type touch panel.
The invention of claim 15 is the method for detecting a plurality of articles of a capacitive touch panel,
Confirming contact of the touch panel with at least two items;
Calculating the number of articles in contact with the touch panel;
Calculating a contact time of the at least two articles with respect to the touch panel;
If the contact time is greater than a set time, confirming separation from at least one of the touch panels in the at least two articles;
Calculating the number of articles that remain on the touch panel;
Sending a drag signal;
The number of articles on the touch panel is maintained unchanged when calculating the contact time, and the number of articles that are stopped on the touch panel after at least one article leaves the touch panel is always greater than 1. A feature is a method of detecting a plurality of articles of a capacitive touch panel.
The invention of claim 16 is the method for detecting a plurality of articles of the capacitive touch panel according to claim 15, wherein the step of confirming the contact of the at least two articles with the touch panel comprises:
Measuring the sensitivity of the touch panel to obtain at least a first peak value and a second peak value;
Calculating the amount of change in the sensitivity when the first and second peak values are both greater than the threshold value;
A plurality of articles of a capacitive touch panel, wherein if the amount of sensitivity is within the second set time and maintains a tendency to increase, at least two articles show contact with the touch panel It is a detection method.
The invention according to claim 17 is the method for detecting a plurality of articles of the capacitive touch panel according to claim 15, wherein the step of confirming separation from at least one touch panel in at least two articles comprises:
Measuring the amount of sensitivity of the touch panel to obtain at least a first peak value and a second peak value;
Calculating the amount of change in the sensitivity when at least one of the first peak value and the second peak value is smaller than the threshold value;
The first or second peak value smaller than the threshold value maintains a decreasing tendency within the second set time, and indicates separation from at least one touch panel in at least two articles. It is set as the multiple article detection method of an electrostatic capacitance type touch panel.
The invention of claim 18 further includes the step of calculating the positions of all articles remaining on the touch panel and transmitting a position signal in the method for detecting a plurality of articles of the capacitive touch panel according to claim 15. A feature is a method of detecting a plurality of articles of a capacitive touch panel.

  According to the present invention, the method for detecting a plurality of articles on a capacitive touch panel determines whether the change in sensitivity on the touch panel is due to noise or an operation on the touch panel by setting at least one set time. Thus, it is possible to accurately determine contact or separation of the article with respect to the touch panel, thereby accurately detecting various different operations.

FIG. 8 shows changes in the amount of sensitivity detected when the two peak values of the amount of sensitivity of the present invention are both greater than the threshold value th. Of these, the curve 200 is the sensitivity curve detected this time, and 202 This curve is the sensitivity curve detected last time. FIG. 9 shows the difference between the two sensitivity amounts shown in FIG. FIG. 10 shows the detection signal 204. As shown in FIGS. 8, 9 and 10, when measuring the sensitive amount on the touch panel, as shown in FIG. 8, when the two peak values of the detected sensitive amount are both larger than the threshold value th. The detection signal 204 changes from a low level to a high level as shown in FIG. Subsequently, when it is within the time T _DounDetect and the obtained sensitivity amount dV is a positive value, it is indicated that the two articles are in contact with the touch panel. Among them, each peak value of the sensitivity amount corresponds to one article. Accordingly, in other embodiments, when two or more articles contact the touch panel, the sensitivity amount corresponds to two. The above peak value appears.

FIG. 11 shows a detection signal 206 and a contact signal 208. The detection method confirms the contact operation (Touch Gesture) of a plurality of articles. When at least two articles come into contact with the touch panel, the calculation of the retention time of the at least two articles on the touch panel is performed, and the above-mentioned “detection method for confirming the contact of multiple articles” is met. After the contact is determined, the number of articles touching the touch panel is calculated, and if the time during which at least two articles are subsequently stopped on the touch panel is greater than the set time T _Touch , a multiple article contact signal 208 is sent, and Calculate the position of at least two items. Among them, the multiple article contact signal 208 can be information including the number of articles.

Detection Method for Confirming Separation of Multiple Articles FIG. 12 shows changes in the amount of sensitivity detected when the two peak values of the sensitivity amount are both smaller than the threshold value th, of which the curve 210 is the sensitivity amount curve detected this time The curve 212 is a sensitivity curve detected last time. FIG. 13 shows the difference between the two sensitivity amounts in FIG. 12, and FIG. 14 shows the detection signal 214. As shown in FIGS. 12, 13, and 14, after at least one of the two peak values of the sensitivity detected once after the article touches the touch panel becomes smaller than the threshold value th, for example, this embodiment Then, as shown in FIG. 12, when it is detected that the two peak values of the sensitivity amount are both smaller than the threshold value th, the detection signal 214 is changed from the high level to the low level as shown in FIG. The level changes to the level, and subsequently, within the time T _LiftDetect , the amount of sensitivity is continuously detected, and the previous amount of sensitivity 212 is subtracted from the amount of sensitivity 210 detected each time, and as shown in FIG. If the quantity difference value dV is obtained and within the time T _LiftDetect and the obtained sensitivity quantity difference value dV is both negative, at least one of the two articles is separated from the touch panel. Indicates.

FIG. 15 shows a detection signal 216 and a separation signal 218. When it is detected that at least one article has moved away from the touch panel after the article has contacted the touch panel, the time for separating the at least one article from the touch panel is started, and the number of articles remaining on the touch panel is calculated. If there is still an article that is calculated and stays on the touch panel, the position is calculated and a position signal is sent, which meets the above-mentioned “detection method for confirming separation of multiple articles”, and the article is separated from the touch panel. When the set time is _longer than the set time T _LiftGesture , a separation signal 218 is sent. Similarly, the separation signal 218 can include information on the number of articles.

Detection Method of Multiple Article Tap Operation (Tap Gesture) FIG. 16 displays a detection signal 220 and a tap signal 222. When detecting the touch of at least two items on the touch panel, as shown in FIG. 16, the detection signal 220 changes from a low level to a high level, calculation of the contact time of the item on the touch panel is started, and If the number of articles is calculated and _conforms to the “detection method for confirming contact of a plurality of articles” and the contact time is smaller than the set time T _TapDown , it is detected that all articles have left the touch panel. The signal 220 changes from a high level to a low level, the separation time of the article from the touch panel is calculated, and it matches the “detection method for confirming the separation of a plurality of articles”, and the separation time is a set time T _When larger than _TapLift , a tap signal 222 is sent, the tap positions of at least two articles are calculated, and a position signal is sent.

FIG. 17 shows a detection signal 224 and a double tap signal 226. When at least two articles touch the touch panel first, the detection signal 224 changes from a low level to a high level as shown in FIG. 17, and the first contact time for touching the touch panel of the article is calculated. If the first contact time is smaller than the set time T _TapDown under the circumstances where the number of articles is calculated and it is determined that the number of articles matches the “detection method for confirming separation of a plurality of articles” and the number of articles is unchanged, It is detected that all the articles are separated from the touch panel, the detection signal 224 is changed from the high level to the low level, the separation time from the touch panel of at least two articles is calculated, If it is determined that it matches the “detection method to be performed” and the separation time is smaller than the set time T _TapLift , the secondary contact with respect to the touch panel of all articles is detected, that is, the detection signal 22 4 again changes from the low level to the high level, the second contact time of the secondary contact is calculated, and it is determined that it matches the “detection method for confirming contact of multiple articles”, and the number of articles is When the second contact time is smaller than the set time T _DoubleDown in an unchanging situation, it is detected that all articles are separated from the touch panel again, that is, the detection signal 224 changes from a high level to a low level, It is determined that it matches the “detection method for confirming separation of articles”, a double tap signal 226 is sent, the positions of at least two articles are calculated simultaneously, and a position signal is sent.

FIG. 18 shows a detection signal 228 and a drag signal 230. When primary contact with respect to the touch panel of at least two articles is detected, the detection signal 228 changes from a low level to a high level as shown in FIG. 18, and the first contact of the at least two articles with respect to the touch panel is detected. The time is calculated and the number of articles is calculated, of which the number of articles must be 2 or more, and it is confirmed that it matches the "detection method for confirming contact of multiple articles", and the number of articles remains unchanged When the first contact time is larger than the set time T _TapDown , it is determined that at least one of the at least two articles is separated from the touch panel, and _conforms to the “detection method for confirming separation of a plurality of articles”, and the touch panel When the number of articles staying on is larger than 1, a drag signal 230 is sent, and simultaneously the position of the article is calculated and a position signal is sent.

  In each of the above-described embodiments, various operations on the touch panel are confirmed by comparing the change in the amount of sensitivity and the set time, thereby preventing misperception due to noise interference.

It is a display figure of a known two-dimensional electrostatic capacitance type touch panel. FIG. 2 is a relationship diagram between a sensitivity amount and a position on the touch panel of FIG. 1. It is a sensitive amount change display figure detected when a touch panel is touched with two fingers. It is a display figure of noise. FIG. 5 is a sensitivity waveform diagram obtained by analog conversion of noise in FIG. 4. FIG. 6 is a waveform diagram obtained by sampling FIG. 5. It is a wave form diagram obtained when a touch panel is touched with two fingers. It is a wave form diagram detected when the amount of sensitivity is larger than the threshold value th. It is a figure which shows the value of the difference of the sensitivity amount of 2 times in FIG. It is a figure which displays the detection signal for demonstrating this invention. It is a detection signal and a contact signal display figure. It is a sensitivity amount change figure detected when the amount of sensitivity is smaller than the threshold value th. It is a figure which shows the value of the difference of the sensitivity amount of 2 times in FIG. It is a figure which shows a detection signal. It is a figure which shows a detection signal and a separation signal. It is a figure which shows a detection signal and a tap signal. It is a figure which shows a detection signal and a double tap signal. It is a figure which shows a detection signal and a drag signal.

Explanation of symbols

100 Touch panel 102 Panel 104 Y-axis sensitive layer 106 Insulating layer 108 X-axis sensitive layer 110 Bottom plate 112 Finger 200 Sensitive amount curve 202 detected this time Sensitive amount curve curve 204 detected last time Detection signal 206 Detection signal 208 Contact signal 210 This time detection Sensitivity curve 212 detected curve Sensitivity curve 214 detected last time Detection signal 216 Detection signal 218 Separation signal 220 Detection signal 222 Tap signal 224 Detection signal 226 Double tap signal 228 Detection signal 230 Drag signal

Claims (18)

In the method for detecting a plurality of articles of a capacitive touch panel,
Detecting a sensitivity amount of the touch panel to obtain at least a first peak value and a second peak value;
Calculating the amount of change in the amount of sensitivity when the first peak value and the second peak value are both greater than the threshold value;
A plurality of articles of a capacitive touch panel, wherein if the amount of sensitivity maintains an increasing tendency within a set time, it is displayed that at least two articles are in contact with the touch panel. Detection method. The method for detecting a plurality of articles of the capacitive touch panel according to claim 1, further comprising:
Calculating the number of articles in contact with the touch panel;
Calculating a contact time of the at least two articles with respect to the touch panel;
Sending a contact signal when the contact time reaches a second set time;
A method for detecting a plurality of articles on a capacitive touch panel, wherein the number of articles on the touch panel is maintained and unchanged during contact time calculation.   3. The method of detecting a plurality of articles on a capacitive touch panel according to claim 2, further comprising the step of calculating the positions of the at least two articles and transmitting a position signal. The multiple article detection method. In the method for detecting a plurality of articles of a capacitive touch panel,
Confirming contact of the touch panel with at least two items;
Measuring the amount of sensitivity of the touch panel to obtain at least a first peak value and a second peak value;
Calculating at least one of the first peak value and the second peak value when the sensitivity value is smaller than the threshold value;
If the first or second peak value smaller than the threshold value maintains a decreasing tendency within the set time, at least one of at least two articles indicates that the touch panel is separated from the touch panel. A method for detecting a plurality of articles of a capacitive touch panel. The method for detecting a plurality of articles of the capacitive touch panel according to claim 4, wherein the step of confirming contact of at least two articles with respect to the touch panel includes:
Measuring a sensitivity amount and obtaining at least a first peak value and a second peak value;
Calculating the amount of change in the sensitivity when the first and second peak values are both greater than the threshold value;
A plurality of articles of a capacitive touch panel, wherein if the amount of sensitivity is within the second set time and maintains a tendency to increase, at least two articles show contact with the touch panel Detection method. The method for detecting a plurality of articles of the capacitive touch panel according to claim 4, further comprising:
Calculating a separation time of the at least one article from the touch panel;
Sending a separation signal when the separation time exceeds a second set time;
Calculating the number of articles that remain on the touch panel;
A plurality of capacitive touch panels, wherein when the number of articles retained on the touch panel is not zero, the position of the articles retained on the touch panel is calculated and a position signal is transmitted. Article detection method. In the method for detecting a plurality of articles of a capacitive touch panel,
Confirming contact of the touch panel with at least two items;
Calculating a contact time of the at least two articles with respect to the touch panel;
If the contact time is smaller than the first set time, confirming separation of all articles from the touch panel;
Calculating the separation time of all articles from the touch panel;
Sending the tap signal if the separation time is greater than the second set time;
And the number of articles on the touch panel is maintained unchanged during the contact time calculation. The method for detecting a plurality of articles of a capacitive touch panel according to claim 7, wherein the step of confirming contact of at least two articles with respect to the touch panel includes:
Measuring the sensitivity of the touch panel to obtain at least a first peak value and a second peak value;
Calculating the amount of change in the sensitivity when the first and second peak values are both greater than the threshold value;
A plurality of articles of a capacitive touch panel, wherein if the amount of sensitivity is within the second set time and maintains a tendency to increase, at least two articles show contact with the touch panel Detection method.   9. The method for detecting a plurality of articles of a capacitive touch panel according to claim 8, further comprising a step of calculating a position on the touch panel of at least two articles and transmitting a position signal. A method for detecting a plurality of articles on a touch panel. The method for detecting a plurality of articles of the capacitive touch panel according to claim 7, wherein the step of confirming the separation of all articles from the touch panel includes:
Measuring the amount of sensitivity of the touch panel to obtain at least a first peak value and a second peak value;
Calculating the amount of change in the sensitivity when the first peak value and the second peak value are both smaller than the threshold value;
And a method for detecting a plurality of articles of a capacitive touch panel, wherein if the amount of sensitivity maintains a decreasing tendency within a second set time, at least two articles are separated from the touch panel. . In the method for detecting a plurality of articles of a capacitive touch panel,
Confirming contact of the touch panel with at least two items;
Calculating the number of articles in contact with the touch panel;
Calculating a first contact time of the at least two articles with respect to the touch panel; and confirming separation of the at least two articles from the touch panel if the first contact time is less than a first set time;
Calculating a separation time of the at least two articles from the touch panel;
If the separation time is less than the second set time, confirming contact of the at least two articles with the touch panel;
Calculating a second contact time for the touch panel of the at least two articles;
If the second contact time is less than a third set time, confirming separation of the at least two articles from the touch panel;
Sending a double tap signal;
And the number of articles on the touch panel is maintained unchanged during the first and second contact time calculations. The method of detecting a plurality of articles on the capacitive touch panel according to claim 11, wherein the contact of at least two articles with respect to the touch panel is confirmed.
Measuring the sensitivity of the touch panel to obtain at least a first peak value and a second peak value;
Calculating the amount of change in the sensitivity when the first and second peak values are both greater than the threshold value;
A plurality of articles of a capacitive touch panel, wherein if the amount of sensitivity is within the fourth set time and maintains a tendency to increase, at least two articles show contact with the touch panel Detection method. The method for detecting a plurality of articles of a capacitive touch panel according to claim 11, wherein the step of confirming the separation of at least two articles from the touch panel includes:
Measuring the amount of sensitivity of the touch panel to obtain at least a first peak value and a second peak value;
Calculating the amount of change in the sensitivity when the first peak value and the second peak value are both smaller than the threshold value;
And a method for detecting a plurality of articles of a capacitive touch panel, in which at least two articles are separated from the touch panel if the amount of sensitivity maintains a decreasing tendency within the fourth set time. .   12. The method for detecting a plurality of articles of a capacitive touch panel according to claim 11, further comprising a step of calculating a position of at least two articles on the touch panel and transmitting a position signal. A method for detecting a plurality of articles on a touch panel. In the method for detecting a plurality of articles of a capacitive touch panel,
Confirming contact of the touch panel with at least two items;
Calculating the number of articles in contact with the touch panel;
Calculating a contact time of the at least two articles with respect to the touch panel;
If the contact time is greater than a set time, confirming separation from at least one of the touch panels in the at least two articles;
Calculating the number of articles that remain on the touch panel;
Sending a drag signal;
The number of articles on the touch panel is maintained unchanged when calculating the contact time, and the number of articles that are stopped on the touch panel after at least one article leaves the touch panel is always greater than 1. A feature of the present invention is a method for detecting a plurality of articles on a capacitive touch panel. The method for detecting a plurality of articles of a capacitive touch panel according to claim 15, wherein the step of confirming contact of at least two articles with respect to the touch panel comprises:
Measuring the sensitivity of the touch panel to obtain at least a first peak value and a second peak value;
Calculating the amount of change in the sensitivity when the first and second peak values are both greater than the threshold value;
A plurality of articles of a capacitive touch panel, wherein if the amount of sensitivity is within the second set time and maintains a tendency to increase, at least two articles show contact with the touch panel Detection method. The method for detecting a plurality of articles of a capacitive touch panel according to claim 15, wherein the step of confirming separation from at least one touch panel in at least two articles is performed.
Measuring the amount of sensitivity of the touch panel to obtain at least a first peak value and a second peak value;
Calculating the amount of change in the sensitivity when at least one of the first peak value and the second peak value is smaller than the threshold value;
The first or second peak value smaller than the threshold value maintains a decreasing tendency within the second set time, and indicates separation from at least one touch panel in at least two articles. A method for detecting a plurality of articles of a capacitive touch panel. 16. The method for detecting a plurality of articles of a capacitive touch panel according to claim 15, further comprising the step of calculating the positions of all articles that are retained on the touch panel and transmitting a position signal. -Type touch panel multiple article detection method.

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