JP2008269642A - Article detection method for electrostatic capacitance type touch panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an article detection method for an electrostatic capacitance type touch panel. <P>SOLUTION: This method detects interference of a noise or scan for an article on the touch panel by at least one set time, detects accurately contact and separation of the article to the touch panel, and detects accurately operations in various different actions. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a kind of article detection method for a capacitive touch panel, and more particularly to a noise prevention article detection method.

  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 can therefore 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 interference of wireless device signals such as a mobile phone. For this reason, when there is an article on which the touch panel 100 performs contact, click, movement or other manual operation. May be mistaken. 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.

  It is an object of the present invention to provide a kind of capacitive touch panel article detection method that can prevent noise interference.

The invention of claim 1 is a method for detecting an article of a capacitive touch panel,
Confirming contact of the article with the touch panel;
Calculating a contact time of the article with respect to the touch panel;
If the contact time is less than the first set time, confirming separation of the article from the touch panel;
Calculating a separation time of the article from the touch panel;
Sending the tap signal if the separation time is greater than the second set time;
It is set as the article | item detection method of the capacitive touch panel characterized by including these.
According to a second aspect of the present invention, in the article detection method for a capacitive touch panel according to the first aspect, the step of confirming the contact of the article with the touch panel includes:
Measuring the sensitivity of the touch panel;
Calculating the amount of change in the amount of sensitivity when the amount of sensitivity is greater than a threshold value;
An article of a capacitive touch panel, characterized in that, within the third set time, if there is a tendency for the amount of sensitivity to keep increasing, it is determined that there is contact with the touch panel of the article It is a detection method.
According to a third aspect of the present invention, in the article detection method for a capacitive touch panel according to the first aspect, the step of confirming separation of the article from the touch panel includes:
Measuring the sensitivity of the touch panel;
Calculating the amount of change in sensitivity when the amount of sensitivity is less than a threshold value;
A capacitive touch panel, wherein if the amount of sensitivity is within a third set time and maintains a decreasing tendency, it is determined that the article is separated from the touch panel. This is an article detection method.
According to a fourth aspect of the present invention, there is provided the capacitance touch panel article detection method according to the first aspect, further comprising a step of calculating a position of the article and transmitting a position signal. Type touch panel article detection method.
The invention of claim 5 is an article detection method for a capacitive touch panel,
Confirming contact of the article with the touch panel;
Calculating a first contact time for the touch panel of the article;
If the first contact time is less than the first set time, confirming separation of the article from the touch panel;
Calculating a separation time of the article from the touch panel;
If the separation time is less than a second set time, confirming contact of the article with the touch panel;
Calculating a second contact time for the touch panel of the article;
Sending a drag signal if the second contact time is greater than the third set time;
It is set as the article | item detection method of the capacitive touch panel characterized by including these.
According to a sixth aspect of the present invention, in the method for detecting an article of a capacitive touch panel according to the fifth aspect, the step of confirming contact of the article with the touch panel includes:
Measuring the sensitivity of the touch panel;
Calculating the amount of change in the amount of sensitivity when the amount of sensitivity is greater than a threshold value;
An article of a capacitive touch panel, characterized in that, within the fourth set time, if there is a tendency for the amount of sensitivity to keep increasing, it is determined that there is contact with the touch panel of the article It is a detection method.
The invention according to claim 7 is the method for detecting an article of the capacitive touch panel according to claim 5, wherein the step of confirming separation of the article from the touch panel includes:
Measuring the sensitivity of the touch panel;
Calculating the amount of change in sensitivity when the amount of sensitivity is less than a threshold value;
The capacitive touch panel is characterized in that if the sensitive amount is within the fourth set time and maintains a decreasing tendency, it is determined that the article is separated from the touch panel. This is an article detection method.
The invention according to claim 8 is the method for detecting an article of the capacitive touch panel according to claim 5, further comprising a step of calculating the position of the article and transmitting a position signal. Type touch panel article detection method.
The invention of claim 9 is an article detection method for a capacitive touch panel,
Confirming contact of the article with the touch panel;
Calculating a first contact time for the touch panel of the article;
If the first contact time is less than the first set time, confirming separation of the article from the touch panel;
Calculating a separation time of the article from the touch panel;
If the separation time is less than a second set time, confirming contact of the article with the touch panel;
Calculating a second contact time for the touch panel of the article;
A step of confirming separation of the article from the touch panel if the second contact time is smaller than the third set time;
Sending a double tap signal;
It is set as the article | item detection method of the capacitive touch panel characterized by including these.
The invention of claim 10 is the method for detecting an article of a capacitive touch panel according to claim 9, wherein the step of confirming the contact of the article with the touch panel comprises:
Measuring the sensitivity of the touch panel;
Calculating the amount of change in the amount of sensitivity when the amount of sensitivity is greater than a threshold value;
An article of a capacitive touch panel, characterized in that, within the fourth set time, if there is a tendency for the amount of sensitivity to keep increasing, it is determined that there is contact with the touch panel of the article It is a detection method.
The invention of claim 11 is the method for detecting an article of a capacitive touch panel according to claim 9, wherein the step of confirming separation of the article from the touch panel comprises:
Measuring the sensitivity of the touch panel;
Calculating the amount of change in sensitivity when the amount of sensitivity is less than a threshold value;
The capacitive touch panel is characterized in that if the sensitive amount is within the fourth set time and maintains a decreasing tendency, it is determined that the article is separated from the touch panel. This is an article detection method.
The invention according to claim 12 is the capacitance touch panel article detection method according to claim 9, further comprising the step of calculating the position of the article and transmitting a position signal. Type touch panel article detection method.

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

FIG. 8 shows a change in the amount of sensitivity detected when the amount of sensitivity of the present invention is greater than the threshold value th, of which the curve 200 is the sensitivity amount curve detected this time. A curve 202 is a sensitivity amount 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 amount of sensitivity on the touch panel, as shown in FIG. 8, when the detected amount of sensitivity is larger than the threshold value th, the detection signal 204 is shown in FIG. As shown in FIG. 4, the level changes from a low level to a high level. Subsequently, within the time T _DounDetect , the sensitivity amount on the touch panel is measured, and the previous sensitivity amount 202 is subtracted from the detected sensitivity amount 200 every time the sensitivity amount is detected, as shown in FIG. Thus, the value dV of the difference in sensitivity is obtained. When the value dV of the sensitivity difference obtained within the time T _DounDetect is a positive value, it indicates that the article is in contact with the touch panel.

FIG. 11 shows a detection signal 206 and a contact signal 208. FIG. 11 shows a detection method for confirming the contact operation of the article. When the article touches the touch panel, the calculation of the dwell time on the touch panel of the article is started, and the article meets the above-mentioned “detection method for confirming the contact of the article” and the article touches the touch panel. If the time for the next stop on the touch panel is longer than the set time T _Touch , the article contact signal 208 is sent, and the position of the article is calculated and the position signal is sent.

Detection Method for Confirming Article Separation FIG. 12 shows the change in the sensitivity detected when the sensitivity is smaller than the threshold value th. Of these, the curve 210 is the sensitivity detected this time, and the curve 212 is the previous detection. Is the sensitivity amount. 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 the article touches the touch panel, as shown in FIG. 12, once it is detected that the sensitivity amount is smaller than the threshold value th, FIG. As shown in FIG. 4, the detection signal 214 changes from the high level to the low level, and is within the time T _LiftDetect , and the sensitivity amount is continuously detected. The sensitivity amount 212 is subtracted to obtain a sensitivity amount difference value dV as shown in FIG. 13, and within the time T _LiftDetect , if the obtained sensitivity amount difference values dV are all negative values, Indicates that this article has left the touch panel.

Detection Method for Confirming Separation Operation (Lift Gesture) FIG. 15 shows a detection signal 216 and a separation signal 218. When it is detected that the article is separated from the touch panel, the calculation of the separation time of the article from the touch panel is started, matches the above-mentioned “detection method for confirming article separation”, and the separation time of the article from the touch panel is set. When the time T _is larger than _LiftGesture , a separation signal 218 is transmitted.

Detection method for confirming the movement of an article from a stationary state It is necessary to perform confirmation when the article is moved from a stationary state. Otherwise, if there is noise or slight vibration in the article, the position of the article is erroneously determined. To cause an error action on the cursor. FIG. 16 shows a change in sensitivity when the article is moved to the left from a stationary state, in which a curve 220 indicates the sensitivity detected this time, and a curve 222 indicates the sensitivity detected last time. . FIG. 17 shows the difference between the two sensitivity amounts shown in FIG. After the contact of the article with the touch panel is confirmed, the amount of sensitivity on the touch panel is detected, and the difference dV between the sensitivity amount 200 detected each time and the sensitivity amount detected last time is calculated, and the sensitivity amount in the left direction of the article is calculated. If the difference value dV of the difference maintains the increasing tendency within the set time T _Movingdetect , the difference value dV of the sensitivity amount in the right direction maintains the decreasing tendency, as shown in FIG. 16 and FIG. Indicates that the left-side sensitivity amount dV of the article maintains a decreasing tendency within the set time T _Movingdetect , and the right-side sensitivity amount When the difference value dV maintains an increasing tendency, it indicates that the article has started to move to the right from the stationary state.

(A) a step of confirming contact of the article with the touch panel;
(B) detecting the movement of the article;
(C) performing the above-described “detection method for confirming movement of an article from a stationary state”; (d) calculating the position of the article and sending a position signal;
(E) detecting the movement of the article again;
(F) calculating the time interval between the current and previous movements, and if the time interval is smaller than the set time T _Moving , return to the step (d), and if not smaller, return to the step (c);
The above steps are included.

Detection Method for Tap Gesture FIG. 18 displays a detection signal 224 and a tap signal 226. When detecting the contact of the article with the touch panel, as shown in FIG. 18, the detection signal 224 changes from the low level to the high level, and the calculation of the contact time of the article with the touch panel is started. If the contact time is smaller than the set time T _TapDown , it is detected that the article has left the touch panel, that is, the detection signal 224 changes from a high level to a low level, When the separation time of the article from the touch panel is calculated and _{meets the} “detection method for confirming the separation of the article” and the separation time is larger than the set time T _TapLift , a tap signal 226 is sent and the tap position of the article Is calculated and a position signal is transmitted.

FIG. 19 shows a detection signal 228 and a drag signal 230. When the primary contact with respect to the touch panel of the article is detected, the detection signal 228 is changed from the low level to the high level as shown in FIG. 19, and the first contact time of the contact with the touch panel of the article is calculated. The detection signal 228 changes from the high level to the low level when the first detection time is smaller than the set time T _TapDown and the detection signal 228 changes from the high level to the low level When the separation time of the article is calculated and matches the “detection method for confirming the separation of the article”, and when the separation time from the touch panel is smaller than the set time T _TapLift , the secondary contact of the article with the touch panel is detected, The detection signal 228 changes again from the low level to the high level, the second contact time is calculated, and it is determined that the detection signal 228 matches the “detection method for confirming contact of the article”, and the second contact When the time is larger than the set time T _DragDown , a drag signal 230 is transmitted, the position of the article is calculated, and a position signal is transmitted.

Method for detecting double tap of article FIG. 20 shows a detection signal 232 and a double tap signal 234. When the primary contact with respect to the touch panel of the article is detected, the detection signal 232 is changed from the low level to the high level as shown in FIG. 20, and the first contact time for contacting the touch panel of the article is calculated. If it is determined that the detection method _conforms to the “detection method for confirming separation of the article” and the first contact time is smaller than the set time T _TapDown , it is detected that the article is separated from the touch panel, and the detection signal 232 is at a high level. If the separation time from the touch panel of the article is calculated from the touch panel to the low level, it is determined that the article matches the “detection method for confirming separation of the article”, and the separation time is smaller than the set time T _TapLift , the article Secondary contact with respect to the touch panel is detected, that is, the detection signal 232 again changes from the low level to the high level, the second contact time of the secondary contact is calculated, and “confirms the contact of the article” When the second contact time is smaller than the set time T _DragDown , it is detected that the article has left the touch panel again, that is, the detection signal 232 is changed from the high level to the low level. It is determined that it matches the “detection method for confirming separation of articles”, a double tap signal 234 is sent, the position of the article is calculated at the same time, 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 display figure of the change of a sensitive amount. 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 of the amount of sensitivity detected when the amount of sensitivity of the present invention 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 of this invention. It is a detection signal and contact signal display figure of this invention. It is a display figure of the sensitivity amount change detected when the sensitivity amount of the present invention 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 the detection signal of this invention. It is a figure which shows the detection signal and isolation | separation signal of this invention. It is a display figure of the change of the amount of sensitivity when the article of the present invention moves to the left from a stationary state. It is a figure which shows the value of the difference of the sensitivity amount of 2 times in FIG. It is a display figure of a detection signal and a tap signal of the present invention. It is a display figure of a detection signal and a drag signal of the present invention. It is a display figure of a detection signal and a double tap signal of the present invention.

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 detected this time 202 Sensitivity amount detected last time 204 Detection signal 206 Detection signal 208 Contact signal 210 Sensitivity detected this time Amount 212 Curve Sensitive amount 214 detected last time Detection signal 216 Detection signal 218 Separation signal 220 Sensitivity amount 222 detected this time Sensing amount 224 detected last time Curve detection signal 226 Tap signal 228 Detection signal 230 Drag signal 232 Detection signal 234 Double Tap signal

Claims (12)

In the article detection method of the capacitive touch panel,
Confirming contact of the article with the touch panel;
Calculating a contact time of the article with respect to the touch panel;
If the contact time is less than the first set time, confirming separation of the article from the touch panel;
Calculating a separation time of the article from the touch panel;
Sending the tap signal if the separation time is greater than the second set time;
A method for detecting an article of a capacitive touch panel, comprising: The method for detecting an article of a capacitive touch panel according to claim 1, wherein the step of confirming contact of the article with the touch panel includes:
Measuring the sensitivity of the touch panel;
Calculating the amount of change in the amount of sensitivity when the amount of sensitivity is greater than a threshold value;
An article of a capacitive touch panel, characterized in that, within the third set time, if there is a tendency for the amount of sensitivity to keep increasing, it is determined that there is contact with the touch panel of the article Detection method. The method for detecting an article of a capacitive touch panel according to claim 1, wherein the step of confirming separation of the article from the touch panel includes:
Measuring the sensitivity of the touch panel;
Calculating the amount of change in sensitivity when the amount of sensitivity is less than a threshold value;
A capacitive touch panel, wherein if the amount of sensitivity is within a third set time and maintains a decreasing tendency, it is determined that the article is separated from the touch panel. Article detection method.   2. The capacitive touch panel article detection method according to claim 1, further comprising a step of calculating a position of the article and transmitting a position signal. In the article detection method of the capacitive touch panel,
Confirming contact of the article with the touch panel;
Calculating a first contact time for the touch panel of the article;
If the first contact time is less than the first set time, confirming separation of the article from the touch panel;
Calculating a separation time of the article from the touch panel;
If the separation time is less than a second set time, confirming contact of the article with the touch panel;
Calculating a second contact time for the touch panel of the article;
Sending a drag signal if the second contact time is greater than the third set time;
A method for detecting an article of a capacitive touch panel, comprising: The article detection method for a capacitive touch panel according to claim 5, wherein the step of confirming contact of the article with the touch panel includes:
Measuring the sensitivity of the touch panel;
Calculating the amount of change in the amount of sensitivity when the amount of sensitivity is greater than a threshold value;
An article of a capacitive touch panel, characterized in that, within the fourth set time, if there is a tendency for the amount of sensitivity to keep increasing, it is determined that there is contact with the touch panel of the article Detection method. In the article detection method for a capacitive touch panel according to claim 5, the step of confirming separation of the article from the touch panel,
Measuring the sensitivity of the touch panel;
Calculating the amount of change in sensitivity when the amount of sensitivity is less than a threshold value;
The capacitive touch panel is characterized in that if the sensitive amount is within the fourth set time and maintains a decreasing tendency, it is determined that the article is separated from the touch panel. Article detection method.   6. The capacitive touch panel article detection method according to claim 5, further comprising a step of calculating a position of the article and transmitting a position signal. In the article detection method of the capacitive touch panel,
Confirming contact of the article with the touch panel;
Calculating a first contact time for the touch panel of the article;
If the first contact time is less than the first set time, confirming separation of the article from the touch panel;
Calculating a separation time of the article from the touch panel;
If the separation time is less than a second set time, confirming contact of the article with the touch panel;
Calculating a second contact time for the touch panel of the article;
A step of confirming separation of the article from the touch panel if the second contact time is smaller than the third set time;
Sending a double tap signal;
A method for detecting an article of a capacitive touch panel, comprising: The article detection method for a capacitive touch panel according to claim 9, wherein the step of confirming contact of the article with the touch panel includes:
Measuring the sensitivity of the touch panel;
Calculating the amount of change in the amount of sensitivity when the amount of sensitivity is greater than a threshold value;
An article of a capacitive touch panel, characterized in that, within the fourth set time, if there is a tendency for the amount of sensitivity to keep increasing, it is determined that there is contact with the touch panel of the article Detection method. The article detection method for a capacitive touch panel according to claim 9, wherein the step of confirming separation of the article from the touch panel includes:
Measuring the sensitivity of the touch panel;
Calculating the amount of change in sensitivity when the amount of sensitivity is less than a threshold value;
The capacitive touch panel is characterized in that if the sensitive amount is within the fourth set time and maintains a decreasing tendency, it is determined that the article is separated from the touch panel. Article detection method.   10. The capacitive touch panel article detection method according to claim 9, further comprising a step of calculating a position of the article and transmitting a position signal.

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