CN103677454B - self-capacitance type touch panel - Google Patents
self-capacitance type touch panel Download PDFInfo
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- CN103677454B CN103677454B CN201210323093.2A CN201210323093A CN103677454B CN 103677454 B CN103677454 B CN 103677454B CN 201210323093 A CN201210323093 A CN 201210323093A CN 103677454 B CN103677454 B CN 103677454B
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Abstract
The present invention provides a kind of self-capacitance type touch panel, comprises an edge electrodes and a contre electrode.This edge electrodes has one first center of gravity.This contre electrode has one second center of gravity.The ratio of P and this first area ratio higher than Q with this second area.This first center of gravity in this edge electrodes likely by contact one first average distance less than in this second center of gravity to this contre electrode likely by one second average distance of contact.
Description
Technical field
The present invention is relevant to touch-control system, and especially with the sensing result in order to promote touch panel edge region just
Really the technology of property is correlated with.
Background technology
Along with science and technology is showing improvement or progress day by day, the most more and more hommization of the operation interface of the most various electronic products.Citing and
Speech, through Touch Screen, user can directly with finger or pointer operate on screen formula, input message/
Word/pattern, eliminates the need for the trouble of the input equipment such as keyboard or button.It practice, Touch Screen is generally by one
Induction panel and be arranged at induction panel rear display composition.Electronic installation according to user on induction panel
The position touched, and the picture that display is presented at that time, judge the meaning of this touching, and perform phase
Corresponding operating result.
Existing capacitance touching control technology can be divided into self-tolerant (self-capacitance) and mutual capacitance type
(mutual-capacitance) two class.Relative to mutual-capacitive touch panel, self-capacitance type touch panel can by processing procedure relatively
Simple single layer electrode structure realizes, and has lower-cost advantage, is therefore widely used in low order electronic product
In.
Fig. 1 is a self-capacitance type touch panel example.It is provided with multiple wide in induction region 100 with empty wire frame representation
And each it is similar to the electrode (such as electrode 11,12,14,15,17) of a right angled triangle.Due in order to detect
The induction apparatus of the capacitance change of each electrode is fairly expensive, and in order to cost-effective, existing contact panel is set mostly
It is calculated as multiple electrode and shares an induction apparatus.As it is shown in figure 1, electrode 11,12 is connected to induction apparatus 13 on first,
Electrode 14,15 is connected to first time induction apparatus 16.In other words, the electric capacity that induction apparatus 13 detects on first
Variable quantity is to occur at the summation of the capacitance change of electrode 11,12, and non-electrode 11,12 each self-corresponding electricity
Hold variable quantity.(N number of upper induction apparatus and N number of lower induction apparatus, it each has 2*N induction apparatus in Fig. 1
One numbering, as i-th induction apparatus, i=1 ~ 2N) capacitance change that records can be transferred into a controller (not
Illustrate), the position occurring user to touch is judged according to this for this controller.Controller can be according to following calculating formula meter
Calculation user touch location coordinate x in the X direction:
Wherein i is scope integer index between 1 to 2N, and Ci represents the electric capacity change that i-th induction apparatus records
Change amount, Xi is then the common center of gravity coordinate representing the electrode that i-th induction apparatus is connected.With induction apparatus on first
As a example by 13, its corresponding center of gravity coordinate Xi is that the common position of centre of gravity of two electrodes 11,12 (falls at electrode
11, between 12).
The difficult problem that contact panel shown in Fig. 1 meets with is that the sensing result of left and right sides marginal area misses by a mile.
Hereinafter the electrode 11,12,14,15,17 in Fig. 1 is redrawn in Fig. 2 and Fig. 3, illustrate what this problem occurred
Reason.
If user touches the position occurring to represent with broken circle frame 21 in such as Fig. 2, only electrode 11,14 is subject to
Impact.In that case, the capacitance variations detected according to induction apparatus on first 13 and first time induction apparatus 16
The coordinate x that amount is calculated there will be no small error.Reason is, although on first, induction apparatus 13 is detected
To capacitance change mainly contributed by electrode 11, but controller is with the common position of centre of gravity of electrode 11,12
The capacitance change that (being denoted as P1) and the center of gravity of non-electrode 11 represent on first detected by induction apparatus 13 occurs
Position.Similarly, although the capacitance change detected by first time induction apparatus 16 is mainly by electrode 14
Contribution, but controller is the common position of centre of gravity (being denoted as P2) with electrode 14,15 and the center of gravity of non-electrode 14 is come
Represent the position that the capacitance change detected by first time induction apparatus 16 occurs.The coordinate x so calculated
Obviously the physical location at relatively round frame 21 place of meeting is to the right.
If as it is shown on figure 3, circle frame 21 is not at the marginal position of induction region 100, the left side of circle frame 21
Part can touch another electrode 31 (not actually existing, be represented by dotted lines) in theory, and then offer one makes seat
The capacitance change of mark x left shift (namely making coordinate x be closer to the true X-coordinate of circle frame 21).Yi Yan
It, in edge region, owing to lacking the balance numerical value that dummy electrodes 31 may be contributed, aforementioned center of gravity P1, P2
The true X-coordinate of distance circle frame 21 is very remote again, and therefore the coordinate x that controller calculates exists sizable error.
Above-mentioned edge region occurs the situation of detection error can cause the touching of controller erroneous judgement user most probably
It is intended to, and then causes the operating result of mistake.If giving up a left side for induction region 100 in order to avoid this mistake
Region, right both sides of the edge need not, the waste of hardware cost can be caused again.
Summary of the invention
For solving the problems referred to above, the present invention proposes new self-capacitance type touch panel, by the sensing changing marginal area
Position of centre of gravity corresponding to device produces relatively prior art testing result accurately.
A specific embodiment according to the present invention is a kind of self-capacitance type touch panel, wherein comprises an edge electrodes and
Contre electrode.This edge electrodes has one first center of gravity.This contre electrode has one second center of gravity.This first center of gravity
In this edge electrodes likely by contact one first average distance less than this second center of gravity to this contre electrode
Middle likely by one second average distance of contact.
Can be further understood by following detailed description and accompanying drawings about the advantages and spirit of the present invention.
Accompanying drawing explanation
Fig. 1 depicts an existing self-capacitance type touch panel example.
Fig. 2 and Fig. 3 can occur the former of big influence error in order to the marginal area that existing self-capacitance type touch panel is described
Cause.
Fig. 4 is according to the electrode in one embodiment of the invention/inductor configurations example；Fig. 5 is in order to illustrate this reality
Execute example and can promote the reason of location correctness.
Fig. 6 is according to the electrode in another embodiment of the present invention/inductor configurations example；
Fig. 7 is in order to illustrate that the present embodiment can promote the reason of location correctness.
Fig. 8 is according to the electrode in another embodiment of the present invention/inductor configurations example.
Fig. 9 is according to the electrode example arrangement in another embodiment of the present invention.
Main element symbol description
100,400,600,800,900: induction region
11,12,14,15,17: electrode
13,16,18: induction apparatus
P1, P2, P3, P4, P5, P6, P7: electrode position of centre of gravity
21,61: user touch location
31: dummy electrodes
41,42,43,44: edge electrodes
41A, 41B, 42A, 42B, 43A, 43B, 44A, 44B: edge electrodes
45,46,47,48,49: induction apparatus
51,52,53,54: contre electrode
92,94: marginal area
96: middle section
92A: edge electrodes
96A: contre electrode
Detailed description of the invention
Being a self-capacitance type touch panel according to one embodiment of the invention, its functional block diagram is as shown in Figure 4.With void
Multiple electrode being each similar to right angled triangle it is provided with in the induction region 400 of wire frame representation.As seen from Figure 4,
Position is in edge electrodes 43,44 relatively other positions of the edge electrodes 41,42 of induction region 400 high order end and low order end
Narrow in the electrode (such as electrode 51,52,53,54) of middle section.In other words, be different from shown in Fig. 1 is previous
Technology, all electrodes in this embodiment are the most wide.Edge electrodes 41,42,43,44 approximation one first is straight
Angle triangle, other electrodes are then approximation one second right angled triangles.The minor face of the first right angled triangle is (parallel
X-direction in figure) it is shorter than the minor face of the second right angled triangle；The secondary minor face of the first right angled triangle (is parallel to
Y-direction in figure) isometric with the secondary minor face of the second right angled triangle.
Also be can be seen that by Fig. 4, on first, induction apparatus 45 is special to detect the capacitance change of edge electrodes 41, the
Once induction apparatus 46 is special to detect the capacitance change of edge electrodes 42, and on N, induction apparatus 47 is special with inspection
Surveying the capacitance change of edge electrodes 43, under N, the special electric capacity with detection edge electrodes 44 of induction apparatus 48 becomes
Change amount.The electrode in other centrally located regions is then that each two electrode shares an induction apparatus.In reality is applied,
This self-capacitance type touch panel also can comprise the control judging touching generation position in order to the testing result according to each induction apparatus
Device processed (does not illustrates).
Exist below according to electrode 41,42,51,52,53,54 explanation how this embodiment redrawn in Fig. 5
The correctness of the testing result of marginal area is better than prior art.It is easy to compare if being intended to ask, it will be assumed that electrode 51 He
Electrode 11 in Fig. 1 is roughly the same at the width of X-direction, but is not limited in practice.
When user touches the position occurring to represent with broken circle frame 61 in such as Fig. 5, electrode 41,42,53
All it is affected.Therefore, 45, first time induction apparatus 46 of induction apparatus and second time induction apparatus 49 detect on first
To capacitance change be all used to calculate the coordinate touched a little.Owing to induction apparatus 45 is only connected to electrode on first
41, when judging, according to formula one, the X-coordinate touched a little, controller is (to be denoted as with the position of centre of gravity of electrode 41
P3) position that the capacitance change detected by induction apparatus 45 occurs is represented on first.Similarly, electrode 42
Position of centre of gravity (being denoted as P4) be used to represent what the capacitance change detected by first time induction apparatus 46 occurred
Position.On the other hand, the common position of centre of gravity (being denoted as P5) of electrode 53,54 is used to represent second time sensing
The position that capacitance change detected by device 49 occurs.
As seen from Figure 5, in the X direction, although position of centre of gravity P5 distance circle frame 61 is slightly remote, but center of gravity position
Put the most fairly close round frame 61 of P3, P4.It will be appreciated that compared to the situation depicted in Fig. 2, this embodiment
In the coordinate x that calculates of controller can be closer to the actual X-coordinate of circle frame 61.More particularly, figure is used
Electrode/the inductor configurations of 4 it is possible to draw more correct coordinate x, be because on average, controller use
The several position of centre of gravitys accounted for during to calculate coordinate x are closer to actual electrode position capacitance change occur.
The electrode 11,12 in electrode 41 and Fig. 2 in comparison diagram 5, is likely subject in center of gravity P3 to electrode 41 to touch
The average distance of point be obviously smaller than center of gravity P1 in electrode 11,12 likely by the average distance of contact.Therefore,
On average, represent on first the capacitance change detected by induction apparatus 45 with the X-coordinate of center of gravity P3,
The capacitance change detected by induction apparatus 13 can be represented on first than with the X-coordinate of center of gravity P1, more can be anti-
Reflect the position actually occurring touching.
It should be noted that the induction apparatus total quantity in Fig. 4 is designed to and the induction apparatus total quantity phase in Fig. 1
With.In practice, it is only necessary to somewhat increase the electrode (such as electrode 51,52,53,54) of middle section in X side
To width, the size of induction region 400 can be made to maintain the size identical with induction region 100.From another
From the point of view of individual angle, as long as predetermining the size of induction region 400 and induction apparatus total quantity and middle section and limit
The relative scale of the electrode width in edge region, just can estimate each electrode width in two regions.
The most also being a self-capacitance type touch panel, its functional block diagram is as shown in Figure 6.
Position is four edge electrodes 41A, 41B, 42A, 42B of induction region 600 high order end and four of low order end
Edge electrodes 43A, 43B, 44A, 44B compared with other centrally located regions electrode (such as electrode 51,52,53,
54) narrow.As seen from Figure 6, in this embodiment, on first, induction apparatus 45 is shared by electrode 41A, 41B,
First time induction apparatus 46 is shared by electrode 42A, 42B, and on N, induction apparatus 47 is electrode 43A, 43B institute
Sharing, under N, induction apparatus 48 is shared by electrode 44A, 44B.The electrode that other centrally located regions are wider
It is that each two electrode shares an induction apparatus equally.In practice, this self-capacitance type touch panel also can comprise in order to basis
The testing result of each induction apparatus judges that touching occurs the controller (not illustrating) of position.
Below according to the electrode 41A redrawn in Fig. 7,41B, 42A, 42B, 51,53, this embodiment is described
The testing result correctness of edge region is better than the reason of prior art.It is easy to compare if being intended to ask, it will be assumed that electrode
51 is roughly the same at the width of X-direction with the electrode 11 in Fig. 1, but is not limited in practice.
There is, when user touches, the position that represents in such as Fig. 7 with broken circle frame 61, electrode 41A, 42A,
42B is affected.Therefore, the capacitance change meeting that induction apparatus 45 and first time induction apparatus 46 detect on first
It is used to calculate the coordinate touched a little.When judging, according to formula one, the X-coordinate touched a little, controller is with electrode
The common position of centre of gravity (being denoted as P6) of 41A, 42A represents the electric capacity change on first detected by induction apparatus 45
The position that change amount occurs, and represent first time sense with the common position of centre of gravity (being denoted as P7) of electrode 42A, 42B
Answer the position that the capacitance change detected by device 46 occurs.Compared in Fig. 2 in order to represent capacitance change
Center of gravity P1, the X-coordinate of P2, in order to represent the X-coordinate of center of gravity P6 of capacitance change, P7 in this embodiment
Obviously closer to the actual X-coordinate of circle frame 61.It follows that compared to the electrode/inductor configurations of figure one, adopt
More correct coordinate x can be drawn by the electrode/inductor configurations of Fig. 6.
The most also being a self-capacitance type touch panel, its functional block diagram is as shown in Figure 8.
Be provided with multiple electrode being each similar to right angled triangle in induction region 800, and either position edge region or
The electrode of middle section is the most wide.As seen from Figure 8, in edge region, on first, induction apparatus 45 is special
In order to detect the capacitance change of edge electrodes 41, first time induction apparatus 46 is special to detect edge electrodes 42
Capacitance change, on N, induction apparatus 47 is special to detect the capacitance change of edge electrodes 43, feels under N
Answer device 48 special to detect the capacitance change of edge electrodes 44.The electrode in other centrally located regions is then every two
Individual electrode shares an induction apparatus.In reality is applied, this self-capacitance type touch panel also can comprise in order to according to each sense
The testing result answering device judges that touching occurs the controller (not illustrating) of position.
Assume the width of the electrode 11,12 that the width of the electrode 41 in Fig. 8 is substantially equal in Fig. 2, in Fig. 8
Electrode 41 can be compared by bringing mutually with the electrode 11,12 in Fig. 2.It is different from the electricity in marginal area in Fig. 2
Pole 11,12 is same is connected to the situation of induction apparatus 13 on first, the electrode 41 in the edge region of position in Fig. 8
It is connected individually to induction apparatus 45 on first.The center of gravity of electrode 41 in electrode 41 likely by contact
Average distance be obviously smaller than center of gravity P1 in electrode 11,12 likely by the average distance of contact.Therefore, flat
For Jun, represent on first the capacitance variations detected by induction apparatus 45 with the X-coordinate of the center of gravity of electrode 41
Amount can than represent on first the capacitance change detected by induction apparatus 13 with the X-coordinate of center of gravity P1 more can be anti-
Reflect the physical location that touching occurs.Similarly, on average, is represented with the X-coordinate of the center of gravity of electrode 42
Once the capacitance change detected by induction apparatus 46 can represent first time sensing than with the X-coordinate of center of gravity P2
Capacitance change detected by device 16 more can reflect the physical location that touching occurs.It follows that compared to adopting
By the electrode/inductor configurations of Fig. 1, the electrode of Fig. 8/inductor configurations edge region also can draw more correct
Coordinate x.
The most also being a self-capacitance type touch panel, electrode therein configuration figure is such as Fig. 9
Shown in.Electrode shape in this embodiment comprises parallelogram and right angled triangle two kinds.Marginal area 92,
Electrode (either parallelogram electrode or triangular-shaped electrodes) in 94 is designed to be shorter than at the width of X-direction
Electrode in middle section 96 is at the width of X-direction.Touching in the present embodiment occurs the X-coordinate of position to calculate
Formula is the most relevant to electrode position of centre of gravity.Each it is connected individually at edge electrodes 92A and contre electrode 96A
In the case of one induction apparatus, narrower edge electrodes 92A is used just to be favorably improved in result of calculation coordinate x
Really property.
Be can be seen that by above example, the main spirits of the present invention is corresponding to the induction apparatus by change marginal area
Position of centre of gravity produce relatively prior art coordinate x accurately.For Fig. 4 and Fig. 8, edge electrodes 41
Center of gravity in edge electrodes 41 be likely designed to less than contre electrode 51,52 by the average distance of contact
Common center of gravity in contre electrode 51,52 likely by the average distance of contact.For Fig. 6, edge
The common center of gravity of electrode 41A, 41B in edge electrodes 41A, 41B likely by contact average distance with
Sample is designed to the common center of gravity less than contre electrode 51,52 to institute in contre electrode 51,52 likely by contact
Average distance.
It will be appreciated that the range of application of the technological concept of the present invention is not limited to former electrodes shape, electrode configuration side
Formula and inductor configurations mode.For example, each contre electrode in Fig. 4 is designed to be individually connected to one
Individual induction apparatus (does not the most share induction apparatus).In that case, owing to the center of gravity of edge electrodes 41 is to edge
In electrode 41 likely by the average distance of contact still less than the center of gravity of contre electrode 51 to contre electrode 51
Middle likely by the average distance of contact, the effect drawing more correct coordinate x can be reached equally.
By the above detailed description of preferred embodiments, it would be desirable to more clearly describe inventive feature and spirit,
And not with above-mentioned disclosed preferred embodiment, scope of the invention is any limitation as.On the contrary, its mesh
Be intended to contain various change and tool equality the category being arranged in the scope of the claims that the present invention to be applied for
In.
Claims (4)
1. a self-capacitance type touch panel, comprises:
One edge electrodes, has one first center of gravity, and this first center of gravity represents the electric capacity of this edge electrodes detected and becomes
The position that change amount occurs；And
One contre electrode, has one second center of gravity, and this second center of gravity represents the electric capacity of this contre electrode detected and becomes
The position that change amount occurs；
Wherein this first center of gravity in this edge electrodes likely by contact one first average distance less than this
Two centers of gravity in this contre electrode likely by one second average distance of contact；
Wherein, flat shape approximation one first parallelogram of this edge electrodes, the flat shape of this contre electrode
Approximate one second parallelogram, one first limit of this first parallelogram and the 1 of this second parallelogram the
Two limits are isometric, and this first parallelogram is perpendicular to one first height on this first limit and is shorter than this second parallelogram and hangs down
Directly in one second height on this second limit.
2. self-capacitance type touch panel as claimed in claim 1, it is characterised in that this first center of gravity has one the
One coordinate, this second center of gravity has one second coordinate, and this self-capacitance type touch panel comprises further:
One first induction apparatus, is connected to this edge electrodes, in order to detect one first sensing betiding this edge electrodes
Variable quantity；
One second induction apparatus, is connected to this contre electrode, in order to detect one second sensing betiding this contre electrode
Variable quantity；And
One controller, in order to according to this first coordinate and this first sensing product of variable quantity and this second coordinate with
The product of this second sensing variable quantity judges that a touching occurs position.
3. a self-capacitance type touch panel, comprises:
One edge electrodes, has one first center of gravity, and this first center of gravity represents the electric capacity of this edge electrodes detected and becomes
The position that change amount occurs, this edge electrodes comprises multiple edges sub-electrode；
One contre electrode, has one second center of gravity, and this second center of gravity represents the electric capacity of this contre electrode detected and becomes
The position that change amount occurs, this contre electrode comprises multiple central authorities sub-electrode；
One first induction apparatus, comprises multiple first sub-induction apparatus, and each the plurality of first sub-induction apparatus is connected to the plurality of
One first edge sub-electrode of edge sub-electrode, in order to detect the one first sensing change betiding this edge electrodes
Amount；And
One second induction apparatus, comprises multiple second sub-induction apparatus, is connected to this contre electrode, each the plurality of second son
Induction apparatus is connected to one first central authorities' sub-electrode and one second central authorities' sub-electrode of the plurality of central authorities sub-electrode, in order to examine
Survey the one second sensing variable quantity betiding this contre electrode；
Wherein, flat shape approximation one first parallelogram of this edge electrodes, the flat shape of this contre electrode
Approximate one second parallelogram, one first limit of this first parallelogram and the 1 of this second parallelogram the
Two limits are isometric, and this first parallelogram is perpendicular to one first height on this first limit and is shorter than this second parallelogram and hangs down
Directly in one second height on this second limit.
4. self-capacitance type touch panel as claimed in claim 3, it is characterised in that this first center of gravity has one the
One coordinate, this second center of gravity has one second coordinate, and this self-capacitance type touch panel comprises further:
One controller, in order to according to this first coordinate and this first sensing product of variable quantity and this second coordinate with
The product of this second sensing variable quantity judges that a touching occurs position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210323093.2A CN103677454B (en) | 2012-09-04 | 2012-09-04 | self-capacitance type touch panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210323093.2A CN103677454B (en) | 2012-09-04 | 2012-09-04 | self-capacitance type touch panel |
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| CN103677454A CN103677454A (en) | 2014-03-26 |
| CN103677454B true CN103677454B (en) | 2016-09-14 |
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| CN201210323093.2A Expired - Fee Related CN103677454B (en) | 2012-09-04 | 2012-09-04 | self-capacitance type touch panel |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104102397B (en) * | 2013-04-12 | 2017-04-19 | 晨星半导体股份有限公司 | Self-contained touch panel |
| CN104020907B (en) * | 2014-05-30 | 2017-02-15 | 京东方科技集团股份有限公司 | In cell touch panel and display device |
| CN104035640B (en) | 2014-05-30 | 2017-10-27 | 京东方科技集团股份有限公司 | A kind of In-cell touch panel and display device |
| CN104020891A (en) | 2014-05-30 | 2014-09-03 | 京东方科技集团股份有限公司 | In cell touch panel and display device |
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|---|---|---|---|---|
| US6297811B1 (en) * | 1999-06-02 | 2001-10-02 | Elo Touchsystems, Inc. | Projective capacitive touchscreen |
| US20080252608A1 (en) * | 2007-04-12 | 2008-10-16 | 3M Innovative Properties Company | Touch sensor with electrode array |
| CN102439551A (en) * | 2009-05-22 | 2012-05-02 | 泰科电子公司 | Electrode configurations for projected capacitive touch screen |
| CN102483672A (en) * | 2009-07-29 | 2012-05-30 | 泰科电子公司 | System And Method For A Projected Capacitive Touchscreen Having Weight Based Coordinate Determination |
| CN103577006A (en) * | 2012-08-07 | 2014-02-12 | 晨星软件研发(深圳)有限公司 | Self-capacitance type touch panel |
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2012
- 2012-09-04 CN CN201210323093.2A patent/CN103677454B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6297811B1 (en) * | 1999-06-02 | 2001-10-02 | Elo Touchsystems, Inc. | Projective capacitive touchscreen |
| US20080252608A1 (en) * | 2007-04-12 | 2008-10-16 | 3M Innovative Properties Company | Touch sensor with electrode array |
| CN102439551A (en) * | 2009-05-22 | 2012-05-02 | 泰科电子公司 | Electrode configurations for projected capacitive touch screen |
| CN102483672A (en) * | 2009-07-29 | 2012-05-30 | 泰科电子公司 | System And Method For A Projected Capacitive Touchscreen Having Weight Based Coordinate Determination |
| CN103577006A (en) * | 2012-08-07 | 2014-02-12 | 晨星软件研发(深圳)有限公司 | Self-capacitance type touch panel |
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Effective date of registration: 20210129 Address after: Grand Cayman Islands Patentee after: Yili Technology (Cayman) Co.,Ltd. Address before: 1, 10th floor, No.1, Taiyuan 2nd Street, Zhubei City, Xinzhu County, Taiwan, China Patentee before: ILI TECHNOLOGY Corp. |
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Granted publication date: 20160914 |
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| CF01 | Termination of patent right due to non-payment of annual fee |