CN101441544B - Detection method of capacitance type ITO touch panel - Google Patents
Detection method of capacitance type ITO touch panel Download PDFInfo
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- CN101441544B CN101441544B CN2007101887915A CN200710188791A CN101441544B CN 101441544 B CN101441544 B CN 101441544B CN 2007101887915 A CN2007101887915 A CN 2007101887915A CN 200710188791 A CN200710188791 A CN 200710188791A CN 101441544 B CN101441544 B CN 101441544B
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Abstract
The invention provides a capacitive ITO touchpad. The capacitive ITO touchpad comprises an ITO sensor and a touch IC which is used for judging the position of an object by detecting variation of the induction amount of the sensor. The method for detecting the touchpad comprises: detecting the induction amount generated when various objects touch the touchpad; and judging relative positions among the various objects according to the obtained induction amount.
Description
Technical field
The present invention is relevant a kind of condenser type tin indium oxide (ITO) touch pad, particularly about a kind of detection method of capacitance type ITO touch panel.
Background technology
Lightening along with electronic installation, the range of application of capacitive type touch pad is also more and more wider.Fig. 1 and Fig. 2 show one dimension capacitive type touch pad 10, and it comprises that a sensor 12 has many line of induction 1～E and a touching IC 14.When finger during 16 touch sensors 12, the line of induction on the touch sensor 12 5,6,7 and 8 for example, as shown in Figure 1, touching IC 14 will detect on the line of induction 5,6,7 and 8 and the variation of induction amount occur, and then judge the position of finger 16.Right-hand influence value figure during touching IC 14 can obtain as Fig. 1 detected induction quantitative changeization after the analog digital conversion, wherein bigger influence value is represented with long histogram.As two fingers 16 and 18 simultaneously during touch sensor 12, as shown in Figure 2, touching IC 14 will detect the line of induction 2,3,4 and 5 and the line of induction 9, A, B and C and the variation of induction amount appears, shown in the right-hand influence value figure of Fig. 2, point 16 and 18 position so can declare.Fig. 3 shows two-dimentional capacitive type touch pad 20, and it comprises that sensor 22 has many horizontal lines of induction and many vertical lines of induction and touches IC 24.As previously mentioned, touching IC 24 points 26 and 28 position with the induction quantitative changeization on the detecting sensor 22 to judge, sensor 22 has comprised the line of induction of both direction again, so touching IC 24 will detect vertical direction induction amount and horizontal direction induction amount, respectively shown in left influence value figure among Fig. 3 and right-hand influence value figure.
Fig. 4 and Fig. 5 respectively show two positions of finger 32 and 34 on touch pad 30.In Fig. 4, finger 32 position be (X1, Y1) point 34 position for (X2, Y2), in Fig. 5, the position of finger 32 be (X1, Y2) point 34 position be (X2, Y1).The sensor of traditional capacitive type touch pad is to be produced on printed circuit board (PCB) or the flexible printer circuit version (FPC), the two lead impedance is all very little, no matter so that position of finger touches sensor, the detected wave mode shape of touching IC almost is the same, therefore when two fingers, 32 and 34 touching touch pads 30, the relative position that touching IC can't distinguish between the finger 32 and 34 is the situation of Fig. 4 or Fig. 5, this is because concerning touching IC, the resulting wave mode shape of Fig. 4 and Fig. 5 situation is quite similar, this will cause some gesture to judge, for example a specific bit one refers to the gesture of rotation.
Therefore, a kind of detection method of judging finger relative position on touch pad is to be the institute Ji.
Summary of the invention
One of purpose of the present invention is to propose a kind of detection method of capacitance type ITO touch panel.
One of purpose of the present invention is to propose a kind of detection method of judging a plurality of objects relative position on touch pad.
The invention provides a kind of detection method of capacitance type ITO touch panel, described touch pad comprises that touching IC connects many ITO lines of induction in the junction, this method comprises the following steps: to detect a plurality of induction amounts that produce when a plurality of objects are touched described touch pad, when the described junction of described object distance is near more, can be because the impedance operator of the described ITO line of induction makes detected described induction amount big more; More described a plurality of induction amount obtains the magnitude relationship of described a plurality of induction amounts; And judge relative position between described a plurality of object according to the magnitude relationship of described a plurality of induction amounts.
The present invention also provides a kind of detection method of capacitance type ITO touch panel, described touch pad comprises that touching IC connects many first direction ITO lines of induction and reaches in many second direction ITO lines of induction of second junction connection in first junction, a plurality of first direction induction amounts that this method comprises the following steps: to detect a plurality of objects to be produced in described many first direction ITO lines of induction when touching described touch pad, when described first junction of described object distance is near more, can be because the impedance operator of the described first direction ITO line of induction makes detected described first direction induction amount big more; The a plurality of second direction induction amounts that produce in described many second direction ITO lines of induction when detecting a plurality of objects and touching described touch pad, when described second junction of described object distance is near more, can be because the impedance operator of the described second direction ITO line of induction makes detected described second direction induction amount big more; More described a plurality of first direction induction amount obtains the magnitude relationship of described a plurality of first direction induction amounts; More described a plurality of second direction induction amount obtains the magnitude relationship of described a plurality of second direction induction amounts; Judge the relative position of described a plurality of object on second direction according to the magnitude relationship of described a plurality of first direction induction amounts; And judge the relative position of described a plurality of object on first direction according to the magnitude relationship of described a plurality of second direction induction amounts.
The present invention also provides a kind of detection method of capacitance type ITO touch panel, described touch pad comprises that touching IC connects many first direction ITO lines of induction in the junction, this method comprises the following steps: that touching described touch pad according to a plurality of objects produces a plurality of first direction induction amounts and a plurality of second direction induction amount, when the described junction of described object distance is near more, can be because the impedance operator of the described first direction ITO line of induction makes detected described first direction induction amount big more; Judge the relative position of described a plurality of object on described first direction according to the relative position of described a plurality of first direction induction amounts; More described a plurality of first direction induction amount obtains the magnitude relationship of described a plurality of first direction induction amounts; And judge the relative position of described a plurality of object on described second direction according to the magnitude relationship of described a plurality of first direction induction amounts.
The present invention provides a kind of capacitance type ITO touch panel again, and this capacitance type ITO touch panel comprises: a sensor has many ITO lines of induction, in order to produce a plurality of induction amounts according to a plurality of object touchings; And a touching IC, connect described sensor in the junction, in order to detecting described a plurality of induction amount, and more described a plurality of induction amount obtains the magnitude relationship of described a plurality of induction amounts; Wherein, the more nearly meeting in the described junction of described object distance is because the impedance operator of the described ITO line of induction makes detected described induction amount big more, and the magnitude relationship of described a plurality of induction amounts is used to judge the relative position of described a plurality of objects.
According to the present invention, a kind of capacitance type ITO touch panel comprises that an ITO sensor comprises many lines of induction and a touching IC connects this ITO sensor to detect the induction quantitative changeization on this ITO sensor, a default origin on this ITO sensor, the detection method of this capacitance type ITO touch panel comprises the induction amount that is produced when detecting a plurality of objects touches this ITO sensor, because ITO has bigger impedance, therefore different along with distance between each this object and this true origin, the induction amount that is produced also will be obviously different, size according to detected induction amount, this touching IC can judge the distance of each object and this true origin, and then judges the relative position between a plurality of objects.
Description of drawings
Fig. 1 be the one dimension touch pad and on the induction quantitative changeization;
Fig. 2 be the one dimension touch pad and on the induction quantitative changeization;
Fig. 3 be the two-dimensional touch plate and on the induction quantitative changeization;
Fig. 4 shows first kind of situation of finger position on touch pad;
Fig. 5 shows second kind of situation of finger position on touch pad;
Fig. 6 is the first embodiment of the present invention; And
Fig. 7 is the second embodiment of the present invention.
Drawing reference numeral:
10 one dimension capacitive type touch pads, 12 sensors
14 touching IC, 16 fingers
18 fingers, 20 dimension capacitive type touch pads
22 sensors, 24 touching IC
26 fingers, 28 fingers
30 touch pads, 32 fingers
34 fingers, 40 one dimension capacitance type ITO touch panels
42 ITO sensors, 44 touching IC
46 fingers, 48 fingers
50 pairs of dimension capacitance type ITO touch panel 52 ITO sensors
54 touching IC, 56 fingers
58 fingers
Embodiment
Fig. 6 is the first embodiment of the present invention, and in one dimension capacitance type ITO touch panel 40, ITO sensor 42 has many line of induction 1～E, and touching IC 44 connects the ITO line of induction 1～E of ITO sensor 42.Generally speaking, ITO sensor 42 is a true origin with touching IC 44 junctions, when finger 46 and 48 touching ITO sensors 42, touching IC 44 will detect the induction quantitative changeization on the ITO line of induction 2～5 and the ITO line of induction 9～C, and then obtain the influence value figure right-hand as Fig. 6, because the line of induction 1～E is ITO, so the line of induction 1～E has bigger impedance, therefore, when finger 46 and 48 and true origin between distance not simultaneously, the detected induction amounts of touching IC 44 will be obviously different.By the right-hand influence value figure of Fig. 6 as can be seen, touching IC 44 detects the finger 46 induction amounts that caused greater than the finger 48 induction amounts that cause, so touching IC 44 can judge finger 46 than finger 48 more close true origin, and then judge finger 46 below finger 48, and point 48 above finger 46.
Fig. 7 is the second embodiment of the present invention, and in two-dimentional capacitance type ITO touch panel 50, ITO sensor 52 has the ITO line of induction of many horizontal directions and vertical direction, and touching IC 54 connects the ITO line of induction of more than 52 horizontal direction of ITO sensor and vertical direction.In this embodiment, touching IC 54 connects the below of the ITO line of induction of the left of the ITO line of induction of horizontal directions and vertical direction, thus the true origin of X-axis at left and the true origin of Y-axis below.When finger 56 and 58 touching ITO sensors 52, touching IC 54 will detect the variation of vertical direction induction amount and horizontal direction induction amount, shown in Fig. 7 left and right-hand influence value figure.Because the ITO line of induction has bigger impedance, therefore when pointing more near true origin, detected induction amount is big more.By the influence value figure of Fig. 7 left as can be known, touching IC 54 detects finger 56 locational vertical direction induction amounts greater than finger 58 locational vertical direction induction amounts, so the position that can judge finger 56 is near left, in other words, point the X-axis coordinate of 56 positions than true origin near X-axis.By the right-hand influence value figure of Fig. 7 as can be known, touching IC54 detects finger 56 locational horizontal direction induction amounts greater than finger 58 locational horizontal direction induction amounts, so the position that can judge finger 56 is near the below, in other words, point the Y-axis coordinate of 56 positions than true origin near Y-axis.Therefore, by the characteristic of ITO impedance, touching IC 54 can judge the lower left of finger 56 at finger 58, and points 58 upper right side at finger 56.
Two-dimensional touch plate 50 shown in Figure 7 is relative positions of judging finger 56 and 58 by vertical direction induction amount and horizontal direction induction amount, but also can only judge the relative position of finger 56 and 58 in other embodiments by vertical direction induction amount or horizontal direction induction amount, for example, can find out two fingers 56 and 58 are arranged on touch pad 50 from right-hand horizontal direction influence value figure of Fig. 7, and in the induction amount of left greater than right-hand induction amount, so the finger 56 that can judge left is near the below, and then learn the lower left of finger 56 at finger 58, and point 58 upper right side at finger 56.
Claims (10)
1. the detection method of a capacitance type ITO touch panel, described touch pad comprise that touching IC connects many ITO lines of induction in the junction, is characterized in that this method comprises the following steps:
Detect a plurality of induction amounts that produce when a plurality of objects are touched described touch pad, when the described junction of described object distance is near more, can be because the impedance operator of the described ITO line of induction make detected described induction amount big more;
More described a plurality of induction amount obtains the magnitude relationship of described a plurality of induction amounts; And
Judge relative position between described a plurality of object according to the magnitude relationship of described a plurality of induction amounts.
2. the detection method of a capacitance type ITO touch panel, described touch pad comprises that touching IC connects many first direction ITO lines of induction and reaches in many second direction ITO lines of induction of second junction connection in first junction, it is characterized in that this method comprises the following steps:
The a plurality of first direction induction amounts that produce in described many first direction ITO lines of induction when detecting a plurality of objects and touching described touch pad, when described first junction of described object distance is near more, can be because the impedance operator of the described first direction ITO line of induction makes detected described first direction induction amount big more;
The a plurality of second direction induction amounts that produce in described many second direction ITO lines of induction when detecting a plurality of objects and touching described touch pad, when described second junction of described object distance is near more, can be because the impedance operator of the described second direction ITO line of induction makes detected described second direction induction amount big more;
More described a plurality of first direction induction amount obtains the magnitude relationship of described a plurality of first direction induction amounts;
More described a plurality of second direction induction amount obtains the magnitude relationship of described a plurality of second direction induction amounts;
Judge the relative position of described a plurality of object on second direction according to the magnitude relationship of described a plurality of first direction induction amounts; And
Judge the relative position of described a plurality of object on first direction according to the magnitude relationship of described a plurality of second direction induction amounts.
3. the detection method of a capacitance type ITO touch panel, described touch pad comprise that touching IC connects many first direction ITO lines of induction in the junction, is characterized in that this method comprises the following steps:
Touch described touch pad according to a plurality of objects and produce a plurality of first direction induction amounts and a plurality of second direction induction amount, when the described junction of described object distance is near more, can be because the impedance operator of the described first direction ITO line of induction makes detected described first direction induction amount big more;
Judge the relative position of described a plurality of object on described first direction according to the relative position of described a plurality of first direction induction amounts;
More described a plurality of first direction induction amount obtains the magnitude relationship of described a plurality of first direction induction amounts; And
Judge the relative position of described a plurality of object on described second direction according to the magnitude relationship of described a plurality of first direction induction amounts.
4. a capacitance type ITO touch panel is characterized in that, this capacitance type ITO touch panel comprises:
One sensor has many ITO lines of induction, in order to produce a plurality of induction amounts according to a plurality of object touchings; And
One touching IC connects described sensor in the junction, in order to detecting described a plurality of induction amount, and more described a plurality of induction amount obtains the magnitude relationship of described a plurality of induction amounts;
Wherein, the more nearly meeting in the described junction of described object distance is because the impedance operator of the described ITO line of induction makes detected described induction amount big more, and the magnitude relationship of described a plurality of induction amounts is used for judging the relative position of described a plurality of objects.
5. capacitance type ITO touch panel as claimed in claim 4 is characterized in that, described many ITO lines of induction dispose on a direction.
6. capacitance type ITO touch panel as claimed in claim 4 is characterized in that, described many ITO lines of induction comprise that two groups are disposed respectively on first and second direction.
7. capacitance type ITO touch panel as claimed in claim 6 is characterized in that, described first and second direction is orthogonal.
8. capacitance type ITO touch panel as claimed in claim 6 is characterized in that, the size of described a plurality of first direction induction amounts is used to judge the relative position of described a plurality of object on described second direction.
9. capacitance type ITO touch panel as claimed in claim 8 is characterized in that, the size of described a plurality of second direction induction amounts is used to judge the relative position of described a plurality of object on described first direction.
10. capacitance type ITO touch panel as claimed in claim 8 is characterized in that, the relative position of described a plurality of first direction induction amounts is used to judge the relative position of described a plurality of object on described first direction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101887915A CN101441544B (en) | 2007-11-20 | 2007-11-20 | Detection method of capacitance type ITO touch panel |
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| CN2007101887915A CN101441544B (en) | 2007-11-20 | 2007-11-20 | Detection method of capacitance type ITO touch panel |
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| CN101441544A CN101441544A (en) | 2009-05-27 |
| CN101441544B true CN101441544B (en) | 2011-04-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846712A (en) * | 2010-04-01 | 2010-09-29 | 苏州崴展电子科技有限公司 | ITO (Indium Tin Oxide) electrical characteristic detecting method and detecting system of capacitance type touch screen |
| CN103777826A (en) * | 2012-10-26 | 2014-05-07 | 晨星软件研发(深圳)有限公司 | Self-contained touch control device and control method thereof |
| TWI470521B (en) * | 2012-10-16 | 2015-01-21 | Mstar Semiconductor Inc | Self-capacitive touch control apparatus and control method thereof |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976161A (en) * | 2010-07-27 | 2011-02-16 | 苏州瀚瑞微电子有限公司 | Method for detecting capacitive touch screen |
| US9459736B2 (en) * | 2010-10-12 | 2016-10-04 | Parade Technologies, Ltd. | Flexible capacitive sensor array |
| CN102654543B (en) * | 2012-05-23 | 2014-07-30 | 东莞通华液晶有限公司 | Method for testing capacitive touch screens and testing equipment thereof |
| CN103336611B (en) * | 2013-06-17 | 2017-07-11 | 惠州Tcl移动通信有限公司 | A kind of touch operation method, device and its touch control terminal |
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| CN1885251A (en) * | 2005-06-20 | 2006-12-27 | 义隆电子股份有限公司 | Multi-object detection method for capacitance type touch panel |
| CN1942853A (en) * | 2004-05-06 | 2007-04-04 | 苹果电脑有限公司 | Multipoint touchscreen |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1942853A (en) * | 2004-05-06 | 2007-04-04 | 苹果电脑有限公司 | Multipoint touchscreen |
| CN1885251A (en) * | 2005-06-20 | 2006-12-27 | 义隆电子股份有限公司 | Multi-object detection method for capacitance type touch panel |
Non-Patent Citations (1)
| Title |
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| JP特开2004-355292A 2004.12.16 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846712A (en) * | 2010-04-01 | 2010-09-29 | 苏州崴展电子科技有限公司 | ITO (Indium Tin Oxide) electrical characteristic detecting method and detecting system of capacitance type touch screen |
| CN101846712B (en) * | 2010-04-01 | 2012-08-29 | 苏州崴展电子科技有限公司 | ITO (Indium Tin Oxide) electrical characteristic detecting method and detecting system of capacitance type touch screen |
| TWI470521B (en) * | 2012-10-16 | 2015-01-21 | Mstar Semiconductor Inc | Self-capacitive touch control apparatus and control method thereof |
| US9354739B2 (en) | 2012-10-16 | 2016-05-31 | Mstar Semiconductor, Inc. | Self-capacitive touch control apparatus and control method thereof |
| CN103777826A (en) * | 2012-10-26 | 2014-05-07 | 晨星软件研发(深圳)有限公司 | Self-contained touch control device and control method thereof |
| CN103777826B (en) * | 2012-10-26 | 2017-02-08 | 晨星软件研发(深圳)有限公司 | Self-contained touch control device and control method thereof |
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| CN101441544A (en) | 2009-05-27 |
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