CN101493742A - Touch control detecting method and capacitance touch control system - Google Patents
Touch control detecting method and capacitance touch control system Download PDFInfo
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Abstract
一种触控检测方法执行于电容式触控面板，其包括步骤：在第一感测方向上找出第一感测垫与第二感测垫，第一感测垫为物体触碰电容式触控面板时在第一感测方向上感测能量最高者，第二感测垫为与第一感测垫相邻接的感测垫中感测能量最高者；以及依据第一感测垫与第二感测垫的感测能量差值与位置距离之间的比值，设定于第一感测方向上的输出触碰位置在第一感测垫与第二感测垫间的特定处。本发明还提供适于执行前述触控检测方法的电容式触控系统。
A touch detection method is implemented on a capacitive touch panel, which includes the steps of: finding a first sensing pad and a second sensing pad in a first sensing direction, and the first sensing pad is a capacitive touch pad. When the touch panel senses the highest energy in the first sensing direction, the second sensing pad is the highest sensing energy among the sensing pads adjacent to the first sensing pad; and according to the first sensing pad The ratio between the sensing energy difference and the position distance from the second sensing pad is set at a specific position between the first sensing pad and the second sensing pad when the output touch position in the first sensing direction is . The present invention also provides a capacitive touch system suitable for implementing the aforementioned touch detection method.
Description
Technical field
The invention relates to the touch control detection field, and particularly relevant for a kind of touch control detecting method and capacitance touch control system that is executed in capacitance type touch-control panel.
Background technology
Now, contact panel is integrated on each electronic product widely as input media, the user only needs to slide on panel or contact with touching object (for example object of finger or pointer and so on), cursor is produced relatively move or absolute coordinates moves, can finish various inputs such as comprising character calligraph, scrolling form and virtual key.Wherein, capacitance type touch-control panel is a kind of contact panel that moves with the control cursor that moves on level and smooth panel for finger, when the finger touches panel, first sensing direction of institute's touch position (that is touch point) and the big young pathbreaker of inductive energy on the second sensing direction produce change, the size by detecting inductive energy can judgment object touch capacitor type Trackpad and calculate the touch position coordinate whether.
In the design of some capacitor-type touch panel, can only adopt bigger sensor pad because some technical consideration (as the coiling problem or the detectability of system), the sensor pad of for example 5 millimeters * 5 millimeters or 7 millimeters * 7 mm size sizes; Hence one can see that, and in fact the resolution of the resolution of capacitance type touch-control panel and display panel is compared, and both gaps are quite big, is easy to produce from the distortion that is caused after low-res corresponds to high-res.Therefore, how will be in fact corresponding to the display panel of high-res and can reduce distortion on the correspondence than the capacitance type touch-control panel of low-res, be present problem demanding prompt solution.
Summary of the invention
One of purpose of the present invention is providing a kind of touch control detecting method exactly, corresponds to the distortion that can cause behind the display panel of higher resolution with the capacitance type touch-control panel that reduces than low-res.
Another purpose of the present invention provides a kind of capacitance touch control system.
A kind of touch control detecting method that one embodiment of the invention proposes, it is executed in capacitance type touch-control panel; Touch control detecting method comprises step: find out first sensor pad and second sensor pad on the first sensing direction, when first sensor pad is object touch capacitor type contact panel on the first sensing direction sensing energy soprano, second sensor pad be with the adjacent sensor pad of first sensor pad in the sensing energy soprano; And, be set in the specific place of output touch position between first sensor pad and second sensor pad on the first sensing direction according to the sensing energy difference of first sensor pad and second sensor pad and the ratio between the distance of position.
In an embodiment of the present invention, ratio between the distance of the sensing energy difference of aforesaid foundation first sensor pad and second sensor pad and position, the step that is set in the specific place of output touch position between first sensor pad and second sensor pad on the first sensing direction comprises: distinguishing at least one virtual coordinates of interpolation between the first corresponding coordinate and second coordinate on the first sensing direction at first sensor pad and second sensor pad; And according to the sensing energy difference of first sensor pad and second sensor pad and the ratio between the distance of position, the coordinate that is set in the aforementioned output touch position on the first sensing direction is the specific person in first coordinate and aforementioned at least one virtual coordinates.
In one embodiment of this invention, the position of aforesaid first sensor pad and second sensor pad distance is the wire length of the geometric center of first sensor pad and second sensor pad.
In an embodiment of the present invention, aforesaid touch control detecting method more comprises step: find out the 3rd sensor pad and the 4th sensor pad on the second sensing direction, when the 3rd sensor pad is object touch capacitor type contact panel on the second sensing direction sensing energy soprano, the 4th sensor pad be with the adjacent sensor pad of the 3rd sensor pad in the sensing energy soprano; And, be set in the specific place of output touch position between the 3rd sensor pad and the 4th sensor pad on the second sensing direction according to the sensing energy difference of the 3rd sensor pad and the 4th sensor pad and the ratio between the distance of position.
A kind of capacitance touch control system that yet another embodiment of the invention proposes, it comprises: capacitance type touch-control panel, display panel and main frame; Capacitance type touch-control panel comprises: capacitance type sensing pad array, first treating apparatus and second treating apparatus.The capacitance type sensing pad array comprises a plurality of sensor pad and a plurality of sensor pads of arranging along the first sensing direction of arranging along the second sensing direction, first treating apparatus and these sensor pad electric property couplings of arranging along the first sensing direction, second treating apparatus and these sensor pads of arranging along the second sensing direction are electric property coupling and carry out communication by first PORT COM and first treating apparatus mutually, main frame and display panel be electric property coupling mutually, and carry out communication by first treating apparatus of second PORT COM and aforementioned capacitance type touch-control panel and of second treating apparatus, with the output touch position on the second sensing direction that produces in the output touch position on the first sensing direction and second treating apparatus that receives that first treating apparatus produces, and the cursor that shows according to these output touch position control display panels.Wherein, first treating apparatus is suitable for carrying out the following step: find out first this sensor pad and second this sensor pad on the first sensing direction, when first sensor pad is the capacitance type sensing pad array of object touch capacitor type contact panel on the first sensing direction sensing energy soprano, second sensor pad be with the adjacent sensor pad of first sensor pad in the sensing energy soprano; And, be set in the specific place of aforementioned output touch position between first sensor pad and second sensor pad on the first sensing direction according to the sensing energy difference of first sensor pad and second sensor pad and the ratio between the distance of position.
In one embodiment of this invention, foundation first sensor pad that aforesaid first treating apparatus is carried out and the sensing energy difference of second sensor pad and position apart between ratio, the step that is set in the specific place of output touch position between first sensor pad and second sensor pad on the first sensing direction comprises: at first sensor pad and second sensor pad in distinguishing at least one virtual coordinates of interpolation between the first corresponding coordinate and second coordinate on the first sensing direction; And according to the sensing energy difference of first sensor pad and second sensor pad and the ratio between the distance of position, the coordinate that is set in the aforementioned output touch position on the first sensing direction is the specific person in first coordinate and aforesaid at least one virtual coordinates.Wherein, the position of first sensor pad and second sensor pad distance can first sensor pad and the wire length of the geometric center of second sensor pad.
In one embodiment of this invention, second treating apparatus of aforesaid capacitance touch control system is suitable for carrying out the following step: find out the 3rd sensor pad and the 4th sensor pad on the second sensing direction, when the 3rd sensor pad is the capacitance type sensing pad array of object touch capacitor type contact panel on the second sensing direction sensing energy soprano, the 4th sensor pad be with the adjacent sensor pad of the 3rd sensor pad in the sensing energy soprano; And, be set in the specific place of aforementioned output touch position between the 3rd sensor pad and the 4th sensor pad on the second sensing direction according to the sensing energy difference of the 3rd sensor pad and the 4th sensor pad and the ratio between the distance of position.
The embodiment of the invention utilizes the object (for example finger) of capacitance type touch-control panel to touch the characteristic that sensor pad area and sensing energy are directly proportional, interpolation goes out more coordinate between adjacent sensor pad, and, extrapolate more position near the object practical touch according to the ratio between the distance of its sensing energy difference and position.Therefore, can effectively promote the resolution of capacitor-type touch panel, and reduction corresponds to the distortion that can cause behind the display panel of higher resolution.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended accompanying drawing, be described in detail below.
Description of drawings
By reference above stated specification and following accompanying drawing, technical characterictic of the present invention and advantage are obtained to be understood fully.
Fig. 1 is a structured flowchart of a kind of capacitance touch control system of embodiment of the invention proposition;
Fig. 2 illustrates finding out two specific sensor pads and obtain the sensing energy difference of these two sensor pads and the step of position distance on X sensing direction of a kind of touch control detecting method that the embodiment of the invention proposes;
Fig. 3 illustrates the step according to the output position of touch on the sensing energy difference of two specific sensor pads finding out among Fig. 2 and the ratio setting X sensing direction between the distance of position of the touch control detecting method of embodiment of the invention proposition;
Fig. 4 illustrates finding out two specific sensor pads and obtain the sensing energy difference of these two sensor pads and the step of position distance on Y sensing direction of a kind of touch control detecting method that the embodiment of the invention proposes;
Fig. 5 illustrates the step according to the output position of touch on the sensing energy difference of two specific sensor pads finding out among Fig. 4 and the ratio setting Y sensing direction between the distance of position of the touch control detecting method of embodiment of the invention proposition.
Wherein, Reference numeral
10: capacitance touch control system
12: capacitance type touch-control panel
120: the capacitance type sensing pad array
1201,1203: sense wire
122:X sensing direction treating apparatus
123: PORT COM
124:Y sensing direction treating apparatus
13: main PORT COM
14: main frame
16: display panel
160: cursor
Δ Ex, Δ Ey: sensing energy difference
Δ Dx, Δ Dy: position distance
Cx, Cy: geometric center
1201P, 1203P: sensor pad
20: finger
Embodiment
About aforementioned and other technology contents, characteristics and effect of the present invention, in the detailed description of a following cooperation preferred embodiment with reference to the accompanying drawings, can clearly present.The direction term of being mentioned in following examples, for example: upper and lower a, left side or right side etc. only are the directions with reference to attached drawings.Therefore, the direction term of use is to be used for illustrating not to be to be used for limiting the present invention.
Referring to Fig. 1, it is a structured flowchart of a kind of capacitance touch control system of embodiment of the invention proposition.Capacitance touch control system 10 comprises capacitance type touch-control panel 12, main frame 14 and display panel 16.
Capacitance type touch-control panel 12 comprises capacitance type sensing pad array 120, X sensing direction treating apparatus 122 and Y sensing direction treating apparatus 124.The sense wire 1203 that capacitance type sensing pad array 120 comprises that many sense wires 1201 that are arranged in parallel and extend along X sensing direction and many are arranged in parallel and extends along Y sensing direction.Wherein, each sense wire 1201 comprises the sensor pad 1201P (as shown in Figure 2) of a plurality of rhombuses of arranging along X sensing direction, and each sense wire 1203 comprises shown in the sensor pad 1203P (as Fig. 4) of a plurality of rhombuses of arranging along Y sensing direction.The sensor pad 1201P that arranges along X sensing direction of X sensing direction treating apparatus 122 and these sense wires 1201 is electric property coupling mutually.Y sensing direction treating apparatus 124 and these sensor pad 1203P that arrange along Y sensing direction are electric property coupling and carry out communication by PORT COM 123 and X sensing direction treating apparatus 122 mutually.
Specifically describe a kind of touch control detecting method that is executed in the capacitance type touch-control panel 12 of touch detection system 10 below in conjunction with Fig. 2 to Fig. 4.
Referring to Fig. 2, when the capacitance type sensing pad array 120 of for example single finger 20 touch capacitor type contact panels 12 of object, on X sensing direction, find out specific (x+1) individual sensor pad 1201P and x sensor pad 1201P, and obtain sensing energy difference DELTA Ex and the position distance, delta Dx of (x+1) individual sensor pad 1201P and x sensor pad 1201P.Wherein, (x+1) individual sensor pad 1201P for finger during 20 touch capacitor type sensor pad arrays 120 on X sensing direction the sensing energy soprano, x sensor pad 1201P be with the adjacent sensor pad 1201P of (x+1) individual sensor pad in the sensing energy soprano; The position distance, delta Dx of (x+1) individual sensor pad 1201P and x sensor pad 1201P is to be the wire length of both geometric center Cx for example.
Referring to Fig. 3, it illustrates the step that is set in the specific place of output touch position between (x+1) individual sensor pad 1201P and x sensor pad 1201P on the X sensing direction according to the ratio between sensing energy difference DELTA Ex and the position distance, delta Dx (Δ Ex/ Δ Dx).Can comprise the following steps: particularly
(1) utilize interpolation method at (x+1) individual sensor pad 1201P and x sensor pad 1201P individual virtual coordinates of interpolation (2N+1) between coordinate A* (x+1) corresponding respectively on the X sensing direction and coordinate A*x.Wherein, A is the coordinate amplification coefficient on the X sensing direction, and the middle point coordinate between coordinate A* (x+1) and the coordinate A*x is (A*x+A/2), and the distance between two whenever adjacent coordinates is A/2 (N+1).
(2) according to sensing energy difference DELTA Ex and the ratio between the distance, delta Dx of position (Δ Ex/ Δ Dx) of (x+1) individual sensor pad 1201P and x sensor pad 1201P, the coordinate that is set in the output touch position on the X sensing direction be coordinate A* (x+1) with (2N+1) individual virtual coordinates in specific person (for example Fig. 3 ellipse encloses virtual coordinates firmly).Wherein, (Δ Ex/ Δ Dx) is big more for ratio, and the coordinate of the output touch position on X sensing direction is the closer to coordinate A* (x+1), and the value of Δ Ex is correspondingly also just big more.
Similarly, referring to Fig. 4, when the capacitance type sensing pad array 120 of single finger 20 touch capacitor type contact panels 12, on Y sensing direction, find out specific (y+1) individual sensor pad 1203P and y sensor pad 1203P, and obtain sensing energy difference DELTA Ey and the position distance, delta Dy of (y+1) individual sensor pad 1203P and y sensor pad 1203P.Wherein, (y+1) individual sensor pad 1203P for finger during 20 touch capacitor type sensor pad arrays 120 on Y sensing direction the sensing energy soprano, y sensor pad 1203P be with the adjacent sensor pad 1203P of (y+1) individual sensor pad in the sensing energy soprano; The position distance, delta Dy of (y+1) individual sensor pad 1203P and y sensor pad 1203P is for for example being the length of line of both geometric center Cy.
Referring to Fig. 5, it illustrates the step that is set in the specific place of output touch position between (y+1) individual sensor pad 1203P and y sensor pad 1203P on the Y sensing direction according to the ratio between sensing energy difference DELTA Ey and the position distance, delta Dy (Δ Ey/ Δ Dy).Can comprise the following steps: particularly
(I) utilize interpolation method at (y+1) individual sensor pad 1203P and y sensor pad 1203P individual virtual coordinates of interpolation (2M+1) between coordinate B* (y+1) corresponding respectively on the Y sensing direction and coordinate B*y.Wherein, B is the coordinate amplification coefficient on the Y sensing direction, and the middle point coordinate between coordinate B* (y+1) and the coordinate B*y is (B*y+B/2), and the distance between two whenever adjacent coordinates is B/2 (M+1).
(II) according to sensing energy difference DELTA Ey and the ratio between the distance, delta Dy of position (Δ Ey/ Δ Dy) of (y+1) individual sensor pad 1203P and y sensor pad 1203P, the coordinate that is set in the output touch position on the Y sensing direction be coordinate B* (y+1) with (2M+1) individual virtual coordinates in specific person (for example Fig. 5 ellipse encloses virtual coordinates firmly).Wherein, (Δ Ey/ Δ Dy) is big more for ratio, and the coordinate of the output touch position on Y sensing direction is the closer to coordinate B* (y+1), and the value of Δ Ey is correspondingly also just big more.
So far, can learn the coordinate of finger 20 in the touch position of the capacitance type sensing pad array 120 of capacitance type touch-control panel 12, that is the coordinate of aforementioned output touch position on X, Y sensing direction.Aforementioned touch control detecting method for the present embodiment proposition, the step that Fig. 2 and Fig. 3 illustrate can be carried out by the X sensing direction treating apparatus 122 of capacitance type touch-control panel 10, and the step that Fig. 4 and Fig. 5 illustrate can be carried out by the Y sensing direction treating apparatus 124 of capacitance type touch-control panel 10.
Need to prove that though the touch control detecting method that previous embodiment of the present invention proposes only describes as an example with single-point contact, so it is equally applicable to the situation of multi-point touch.Under the situation of multi-point touch,, can obtain the output touch position on X, Y sensing direction of corresponding each touch position at the touch control detecting method that embodiment of the invention of each touch position execution proposes.
In sum, previous embodiment of the present invention utilizes the object (for example finger) of capacitance type touch-control panel to touch the characteristic that sensor pad area and sensing energy are directly proportional, interpolation goes out more coordinate between adjacent sensor pad, and, extrapolate more position near the object practical touch according to the ratio between the distance of its sensing energy difference and position.Therefore, can effectively promote the resolution of capacitor-type touch panel, and reduction corresponds to the distortion that can cause behind the display panel of higher resolution.
In addition, those skilled in the art also can do suitable change to touch control detecting method and capacitance touch control system that previous embodiment of the present invention proposes, for example definite method of the structural arrangements of the shape of appropriate change sensor pad, capacitance touch control system and/or position distance or the like.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (10)
1. a touch control detecting method is executed in a capacitance type touch-control panel, it is characterized in that, this touch control detecting method comprises step:
On one first sensing direction, find out one first sensor pad and one second sensor pad, this first sensor pad be an object when touching this capacitance type touch-control panel on this first sensing direction the sensing energy soprano, this second sensor pad be with the adjacent sensor pad of this first sensor pad in the sensing energy soprano; And
According to the sensing energy difference of this first sensor pad and this second sensor pad and the ratio between the distance of position, be set in the specific place of the output touch position of one on this first sensing direction between this first sensor pad and this second sensor pad.
2. touch control detecting method according to claim 1, it is characterized in that, according to the sensing energy difference of this first sensor pad and this second sensor pad and the ratio between the distance of position, the step that is set in this specific place of this output touch position between this first sensor pad and this second sensor pad on this first sensing direction comprises:
At this first sensor pad and this second sensor pad at least one virtual coordinates of interpolation between one first corresponding respectively on this first sensing direction coordinate and one second coordinate; And
According to the sensing energy difference of this first sensor pad and this second sensor pad and the ratio between the distance of position, the coordinate that is set in this output touch position on this first sensing direction is the specific person in this first coordinate and this at least one virtual coordinates.
3. touch control detecting method according to claim 1 is characterized in that, this position distance of this first sensor pad and this second sensor pad is the wire length of the geometric center of this first sensor pad and this second sensor pad.
4. touch control detecting method according to claim 1 is characterized in that, more comprises step:
On one second sensing direction, find out one the 3rd sensor pad and one the 4th sensor pad, when the 3rd sensor pad is touched this capacitance type touch-control panel for this object on this second sensing direction the sensing energy soprano, the 4th sensor pad be with the adjacent sensor pad of the 3rd sensor pad in the sensing energy soprano; And
According to the sensing energy difference of the 3rd sensor pad and the 4th sensor pad and the ratio between the distance of position, be set in the specific place of the output touch position of one on this second sensing direction between the 3rd sensor pad and the 4th sensor pad.
5. touch control detecting method according to claim 4, it is characterized in that, according to the sensing energy difference of this first sensor pad and this second sensor pad and the ratio between the distance of position, the step that is set in this specific place of this output touch position between this first sensor pad and this second sensor pad on this first sensing direction comprises:
At this first sensor pad and this second sensor pad at least one virtual coordinates of interpolation between one first corresponding respectively on this first sensing direction coordinate and one second coordinate; And
According to the sensing energy difference of this first sensor pad and this second sensor pad and the ratio between the distance of position, the coordinate that is set in this output touch position on this first sensing direction is the specific person in this first coordinate and this at least one virtual coordinates.
6. capacitance touch control system is characterized in that it comprises:
One capacitance type touch-control panel comprises:
One capacitance type sensing pad array, it comprises a plurality of sensor pad and a plurality of sensor pads of arranging along the first sensing direction of arranging along the second sensing direction;
One first treating apparatus is with the described sensor pad electric property coupling of arranging along the first sensing direction;
One second treating apparatus with the described sensor pad electric property coupling of arranging along the second sensing direction, and carries out communication by one first PORT COM and this first treating apparatus;
One display panel; And
One main frame, with this display panel electric property coupling mutually, and carry out communication by this first treating apparatus of one second PORT COM and this capacitance type touch-control panel and of this second treating apparatus, with the output touch position on this second sensing direction that produces in the output touch position of one on this first sensing direction and this second treating apparatus that receives that this first treating apparatus produces, and control the cursor that this display panel shows according to described output touch position;
Wherein, this first treating apparatus is suitable for carrying out the following step:
On this first sensing direction, find out one first this sensor pad and one second this sensor pad, when this first sensor pad is touched this capacitance type sensing pad array of this capacitance type touch-control panel for this object on this first sensing direction the sensing energy soprano, this second sensor pad be with the adjacent sensor pad of this first sensor pad in the sensing energy soprano; And
According to the sensing energy difference of this first sensor pad and this second sensor pad and the ratio between the distance of position, be set in the specific place of this output touch position between this first sensor pad and this second sensor pad on this first sensing direction.
7. capacitance touch control system according to claim 6, it is characterized in that, this first treating apparatus carry out according to the sensing energy difference of this first sensor pad and this second sensor pad and position apart between ratio, the step that is set in the specific place of this output touch position between this first sensor pad and this second sensor pad on this first sensing direction comprises:
At this first sensor pad and this second sensor pad at least one virtual coordinates of interpolation between one first corresponding respectively on this first sensing direction coordinate and one second coordinate; And
According to the sensing energy difference of this first sensor pad and this second sensor pad and the ratio between the distance of position, the coordinate that is set in this output touch position on this first sensing direction is the specific person in this first coordinate and this at least one virtual coordinates.
8. capacitance touch control system according to claim 6 is characterized in that, this position distance of this first sensor pad and this second sensor pad is the wire length of the geometric center of this first sensor pad and this second sensor pad.
9. capacitance touch control system according to claim 6 is characterized in that, this second treating apparatus is suitable for carrying out the following step:
On this second sensing direction, find out one the 3rd this sensor pad and one the 4th this sensor pad, when the 3rd sensor pad is touched this capacitance type sensing pad array of this capacitance type touch-control panel for this object on this second sensing direction the sensing energy soprano, the 4th sensor pad be with the adjacent sensor pad of the 3rd sensor pad in the sensing energy soprano; And
According to the sensing energy difference of the 3rd sensor pad and the 4th sensor pad and the ratio between the distance of position, be set in the specific place of this output touch position between the 3rd sensor pad and the 4th sensor pad on this second sensing direction.
10. capacitance touch control system according to claim 9, it is characterized in that, this first treating apparatus carry out according to the sensing energy difference of this first sensor pad and this second sensor pad and position apart between ratio, the step that is set in the specific place of this output touch position between this first sensor pad and this second sensor pad on this first sensing direction comprises:
At this first sensor pad and this second sensor pad at least one virtual coordinates of interpolation between one first corresponding respectively on this first sensing direction coordinate and one second coordinate; And
According to the sensing energy difference of this first sensor pad and this second sensor pad and the ratio between the distance of position, the coordinate that is set in this output touch position on this first sensing direction is the specific person in this first coordinate and this at least one virtual coordinates.
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| US20110074726A1 (en) * | 2009-09-25 | 2011-03-31 | Ite Tech. Inc. | Touch panel and touching point detection method thereof |
| CN102043513A (en) * | 2009-10-09 | 2011-05-04 | 禾瑞亚科技股份有限公司 | Method and device for distinguishing single-touch or multi-touch |
| CN102096498A (en) * | 2009-10-09 | 2011-06-15 | 禾瑞亚科技股份有限公司 | Method and device for analyzing position |
| CN102156595A (en) * | 2010-02-12 | 2011-08-17 | 联咏科技股份有限公司 | Touch sensing system, capacitance sensing circuit and capacitance sensing method |
| CN102193693A (en) * | 2010-03-17 | 2011-09-21 | 群康科技(深圳)有限公司 | Touch panel and differential identification method thereof |
| CN102385450A (en) * | 2010-09-03 | 2012-03-21 | 瑞鼎科技股份有限公司 | Method and circuit for detecting touch event |
| CN102981671A (en) * | 2012-09-06 | 2013-03-20 | 友达光电股份有限公司 | Multi-class object touch point detection method |
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| CN100377055C (en) * | 2004-12-22 | 2008-03-26 | 盛群半导体股份有限公司 | Interpretation method of touch control induction device |
| CN101561732B (en) * | 2008-04-18 | 2012-01-11 | 义隆电子股份有限公司 | A capacitive touch panel and its positioning method for two-dimensional applications with a single-layer sensor |
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| US20110074726A1 (en) * | 2009-09-25 | 2011-03-31 | Ite Tech. Inc. | Touch panel and touching point detection method thereof |
| US8350825B2 (en) | 2009-09-25 | 2013-01-08 | Ite Tech. Inc. | Touch panel and touching point detection method thereof |
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| CN102043513B (en) * | 2009-10-09 | 2013-02-27 | 禾瑞亚科技股份有限公司 | Method and device for distinguishing single-touch or multi-touch |
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