CN103365449B - Mutual-capacitive touch panel and touch system - Google Patents
Mutual-capacitive touch panel and touch system Download PDFInfo
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- CN103365449B CN103365449B CN201210092829.XA CN201210092829A CN103365449B CN 103365449 B CN103365449 B CN 103365449B CN 201210092829 A CN201210092829 A CN 201210092829A CN 103365449 B CN103365449 B CN 103365449B
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Abstract
The present invention relates to mutual-capacitive touch panel, comprise N row electrode and multiple control passages.This N row electrode is generally aligned in the same plane and is not connected with each other.Every the most each self-contained multiple electrode members being not connected with each other of string electrode.These control passage and are generally aligned in the same plane with this N row electrode.Each electrode member that this N row electrode is comprised respectively correspond tos a control passage.A controller joined together by this mutual-capacitive touch panel sends through the plurality of control passage and drives signal and receive sensing result.
Description
Technical field
The present invention is relevant to touch-control system, and especially to utilize single-layer electrodes to realize the technology of touch controllable function relevant.
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.For example,
Shielding through touch-control, user can be directly with finger or pointer operation sequence, input message/word/pattern, province in shielding
Go to use the trouble of the input equipment such as keyboard or button.It practice, touch-control shielding is typically by an induction panel and is arranged at sense
The display answering panel rear forms.The position that electronic installation is touched on induction panel according to user, and show at that time
Show the picture that device is presented, judge the meaning of this touching, and perform corresponding operating result.
It is several that existing touch technology is roughly divided into resistance-type, condenser type, induction, Supersonic waves and optical profile type
Class.Fig. 1 is a mutual capacitance type (mutual-capacitive) contact panel example, and its induction panel rear is provided with composition matrix diagram
The transparent line of induction of sample.The line of induction being parallel to X-direction in this example is the driving line of induction, is parallel to the line of induction of Y-direction for connecing
Receive the line of induction.As it is shown in figure 1, every drives the line of induction to be each attached to a driver 12, every receives the line of induction and each connects
To a receptor 14.It is said that in general, these drivers 12 can sequentially send driving signal, these receptors 14 the most persistently receive sense
Induction signal.When touching occurs, corresponding to the driving line of induction of touch points with receive between the line of induction and there will be Capacitance Coupled phenomenon,
The induced signal (such as magnitude of voltage) relevant to mutual capacity is caused to change.Send when occurring according to touching and drive driving of signal
The position of dynamic device 12, and the position of receptor 14 that induced signal changes detected, subsequent conditioning circuit i.e. can determine whether touching
Point coordinate on X/Y direction.
Traditionally, driving the line of induction and the reception line of induction is the transparency electrode being separately positioned on Different Plane；Two planes
Between be provided with dielectric layer (dielectric layer), in order to form interelectrode mutual tolerance.Fig. 2 (A) is for be presently the most widely used
Rhombus electrode pattern.The dark rhombus electrode 16 that Building Y mark is identical is concatenated with one another, constitutes the driving line of induction of X-direction；X-coordinate
Identical light rhombus electrode 18 is concatenated with one another, constitutes the driving line of induction of Y-direction.Due to dark rhombus electrode 16 and light color Pedicellus et Pericarpium Trapae
Shape electrode 18 is in Different Plane, so the part that two kinds of electrodes overlap in drawing is not the most connected.
In order to reduce material cost, there are many manufacturers by aforementioned duallayered electrode structure boil down to single layer electrode structure.?
In existing single layer electrode structure, each prismatic body of dark rhombus electrode 16 and light color rhombus electrode 18 is provided in same flat
Face, the part that two kinds of electrodes overlap in drawing is then to realize with the three-dimensional bridge structure as shown in Fig. 2 (B), and Fig. 2 (B) is one
Top view.In this example, the connecting line between two dark rhombus electrodes 16 is generally aligned in the same plane with prismatic body, but two
Connecting line song between light color rhombus electrode 18 rises and higher than this plane, is denoted as dark connecting line to cross in figure.Thus
Can be seen that, existing single layer electrode structure is actually and non-real single layer structure.Be difficult to due to three-dimensional bridge structure fabrication and
Yield is low, generally speaking, uses existing single layer electrode structure may increase degree of difficulty and the cost of fabrication schedule on the contrary.
Summary of the invention
For solving the problems referred to above, the present invention proposes a kind of new mutual-capacitive touch panel and mutual capacitance type contactor control device, uses
Really the electrode being generally aligned in the same plane and control passage, it is not necessary to three-dimensional bridge structure, therefore can reduce processing procedure difficulty, save and touch
The production cost of control device.
A specific embodiment according to the present invention is a kind of mutual-capacitive touch panel, wherein comprises N row electrode and multiple controls
Passage processed.This N row electrode is generally aligned in the same plane and is not connected with each other.Every string electrode each self-contained bridge mutually many
Individual electrode member.These control passage and are generally aligned in the same plane with this N row electrode.Each electrode unit that this N row electrode is comprised
Part respectively correspond tos a control passage.A controller joined together by this mutual-capacitive touch panel sends through the plurality of control passage
Many driving signals reception sense result more.Wherein, the target electrode element in these electrode members is in a first time point
Receive this driving signal, and provide one of this many sensings result in one second time point.
Another specific embodiment according to the present invention is a kind of mutual capacitance type contactor control device, wherein comprises N row electrode, multiple control
Passage processed and a controller.This N row electrode is generally aligned in the same plane and is not connected with each other.Every string electrode each self-contained the most not
The multiple electrode members bridged mutually.These control passage and are generally aligned in the same plane with this N row electrode.It is every that this N row electrode is comprised
One electrode member respectively correspond tos a control passage.This controller in order to through the plurality of control passage to these electrode members
Send many driving signals or sense result from the reception of these electrode members more.Wherein, this controller sends in a first time point
This driving signal is to the target electrode element in these electrode members, and connects from this target electrode element in one second time point
Receive one of this many sensings result.
More preferably understand in order to the above-mentioned and other aspect of the present invention is had, preferred embodiment cited below particularly, and coordinate attached
Figure, is described in detail below:
Accompanying drawing explanation
Fig. 1 depicts a mutual-capacitive touch panel example.
Fig. 2 (A) is rhombus electrode pattern schematic diagram.
Fig. 2 (B) is in order to illustrate the three-dimensional bridge structure in existing single layer electrode structure.
Fig. 3 (A) is according to the contactor control device block chart in one embodiment of the invention.
Fig. 3 (B) is in order to present the mutual tolerance between electrode member.
Fig. 3 (C) is in order to illustrate the induction region corresponding to each mutual tolerance.
Fig. 4 (A) is according to the electrode pattern in one embodiment of the invention.
Fig. 4 (B) and Fig. 4 (C) is the partial enlarged drawing of Fig. 4 (A).
Fig. 5 (A) and Fig. 5 (B) is the experimental data list according to the present invention.
Fig. 6 is the control channel routing figure example being applicable to the bowtie-shaped electrode pattern according to the present invention.
Fig. 7 (A) and Fig. 7 (B) is according to the other two kinds of electrode patterns in embodiments of the invention.
Fig. 7 (C) is the combination of electrodes example shown in Fig. 7 (B).
Main element symbol description
12: driver 14: receptor
16,18: electrode 300: mutual capacitance type contactor control device
32: controller P11～P44, P51, P52: electrode member
Detailed description of the invention
It is the mutual capacitance type contactor control device 300 as shown in Fig. 3 (A) according to one embodiment of the invention.In actual applications, should
Contactor control device can be integrated in the electronics such as mobile communication equipment, panel computer, PC or interactive information display board
In system, but it is not limited with these situations.Contactor control device 300 comprises 16 rectangular electrode elements being arranged in matrix
P11～P44 and a controller 32.As shown in Fig. 3 (A), electrode member P11～P44 is generally aligned in the same plane, and is not connected with each other,
And each it is connected to controller 32 through an independent control passage.Constitute these circuits controlling passage and electrode member P11
～P44 is also generally aligned in the same plane, and can more densely packed be configured, to shorten the spacing of adjacent electrode elements.
Fig. 3 (B) is the electric capacity schematic diagram between electrode member P11～P33；One is all had between the electrode member that each two is adjacent
Individual mutual tolerance (mutual capacitance).According to the change of these mutual tolerances, controller 32 can determine whether the position that touch points occurs.
For example, if touch points is at electrode member P22 centre, electric capacity C12,22、C21,22、C22,23、C22,32Electric capacitance change can be
Substantially；If touch points is in the middle of electrode member P12, P22, electric capacity C12,22Electric capacitance change can be more notable than other electric capacity.Relatively
Ground, if electric capacity C21,22、C21,31、C31,32、C22,32Electric capacitance change close and relatively other electric capacity are notable, then can determine that touch points
Occur near the confluce of electrode member P21, P22, P31, P32.Fig. 3 (C) is to represent corresponding mutual of each mutual tolerance with stain
Hold the coordinate position of induction point, and outline, with dotted line, the induction region that each mutual tolerance induction point is mainly administered.
In this embodiment, each electrode member all can be optionally set as accepting in different time points respectively
Drive the driving element of signal, or be provided for sensing the sensing element of result.In other words, it is different from prior art, this reality
Executing the electrode member in example is not to be each fixed as a driving element or a sensing element.For example, controller 32 can
First signal will be driven to send to electrode member P22, and measurement ring around electrode member P22 eight electrode members (P11, P12,
P13, P21, P23, P31, P32, P33) voltage, judge whether touch points occurs near electrode member P22 accordingly.At next
Individual time point, controller 32 can change with electrode member P23 for driving element, and with eight electrode units of surrounding electric poles element P32
Part (P12, P13, P14, P22, P24, P32, P33, P34) is sensing element, judges whether touch points occurs in electrode unit accordingly
Near part P32.
The rest may be inferred, and electrode member P11～P44 in Fig. 3 (A) can be set to the driving unit accepting to drive signal in turn
Part, and be not limited with particular order.For example, controller 32 can be the most sequentially with electrode member P11～P44 for driving
Object, from left to right, is from top to bottom scanned.As long as the speed of scanning is enough fast, the touching of user would not be missed.This
One of benefit of scan mode is will not to produce erroneous judgement problem because of ghost point (ghost point) completely.Should be noted that, selected one
Individual target electrode element is as when driving element, and corresponding sensing element quantity is not limited with eight.For example, selected electricity
When pole element P22 is for driving element, controller 32 can only select four electrode members (P12, P21, P23, P32) as sensing unit
Part, or select more than eight electrode members as sensing element.
In practice, controller 32 can only comprise a driver (driver 12 in similar Fig. 1), and through multiplexer
Switching, makes each time point different by the electrode member of this driver drives.Similarly, controller 32 can comprise eight (or other
Fixed qty) receptor (receptor 14 in similar Fig. 1), and through the switching of multiplexer, sensing element will be set to
Electrode member transmits sensing result to receptor.
As shown in Fig. 3 (A), electrode member P11～P44 is each connected to controller 32 through an independent control passage,
And these wirings controlling passage will not overlap mutually, therefore need not the three-dimensional bridge structure in prior art.In practice, electricity
The quantity of pole element, shape and arrangement mode are neither limited with the example shown in Fig. 3 (A).Above-mentioned way can be used in various
Comprise the mutual-capacitive touch panel (N is the integer more than 1) of the electrode that N row are generally aligned in the same plane；This N row electrode is not attached to each other
Connect, the most each self-contained multiple electrode members being not connected with each other of every string electrode.
In another embodiment, the shape of each electrode member is that two black triangles being connected by summit are constituted
Bowtie-shaped, as shown in Fig. 4 (A).These electrode members are also each to be connected to through an independent control passage (not illustrating)
Controller 32.Fig. 4 (B) and the partial enlarged drawing that Fig. 4 (C) is Fig. 4 (A).Fig. 4 (B) presents two adjacent electrode members
P51, P52, the stain in gap represents the location coordinate of the mutual tolerance induction point between electrode member P51, P52, indicates with dotted line
Tetragon then correspond to the induction region of this stain.Fig. 4 (C) presents three columns of electrodes altogether, respectively comprise two, three
Individual, two electrode members.Illustrate with the electrode member that position is entreated in a second column, six edges of bowtie-shaped respectively from different electricity
Pole element is adjacent, therefore indicates six different induction regions of mutual tolerance induction point (dotted line scope) in figure.These induction regions
It is designed to size identical.Controller 32 can detect the mutual tolerance variable quantity between each electrode member, and can be according to mutual tolerance variable quantity
Calculate (such as with center of gravity formula) touching higher than the location coordinate of the mutual tolerance induction point of a preset value and the coordinate of point occurs.
The experiment proved that, compared to using the rectangular electrode pattern shown in Fig. 3 (A), use the bowtie-shaped shown in Fig. 4 (A)
The testing result of electrode pattern gained has the preferably linearity.The experimental data using two kinds of electrode patterns to produce presents respectively
In Fig. 5 (A) and Fig. 5 (B).When the induction region size of this experimental hypothesis each mutual tolerance induction point is identical and calculates according to center of gravity formula
It is endowed identical proportion.Left side field is with the actual coordinate of touch point of software simulation, and middle field is to change according to mutual tolerance
Amount and center of gravity formula judge the coordinate of gained, and right side field is then the difference of two coordinates.Be can be seen that by the two form, use square
During shape electrode pattern, maximum error amount is 0.78mm, and maximum error amount when using bowtie-shaped electrode pattern is 0.5mm.
Additionally, be can be seen that by Fig. 3 (C), each rectangular electrode element is the most adjacent with four additional electrode member, forms four
Individual mutual tolerance, corresponding to four mutual tolerance induction points, and to the mutual capacitance change contribution one of mutual tolerance induction point in each induction region
The strength of half, therefore, each rectangular electrode element is equivalent to contain 4*1/2=2 induction region.Relatively, with regard to Fig. 4 (C)
In bowtie-shaped electrode pattern for, each bowtie-shaped electrode member is mainly the most adjacent with other six electrode members, forms six
Mutual tolerance, corresponding to six mutual tolerance induction points, and to the mutual capacitance change contribution half of mutual tolerance induction point in each induction region
Strength, therefore, each bowtie-shaped electrode member is equivalent to contain 6*1/2=3 induction region.Accordingly, if with Fig. 3 (C)
In rectangular electrode pattern and bowtie-shaped electrode pattern in Fig. 4 (C) respectively constitute the mutual capacitance type touch surface that two areas are identical
Plate, and the size of each rectangular electrode element is identical with the size of each bowtie-shaped electrode member, it is thus evident that knot
The mutual-capacitive touch panel that shape electrode pattern is constituted has the sense of the mutual-capacitive touch panel that 1.5 times of rectangular electrode patterns are constituted
Answer region and mutual tolerance induction point.In other words, the design of the bowtie-shaped electrode pattern in Fig. 4 (C) can significantly improve to position tactile
Touch induction region a little and the density of mutual tolerance induction point, effectively promote the stationkeeping ability of contactor control device.
Fig. 6 is for being applicable to the control channel routing figure example of the bowtie-shaped electrode pattern shown in Fig. 4 (A).As shown in Figure 6,
Each electrode member both corresponds to an independent control passage, and these wirings controlling passage will not overlap mutually, therefore
Need not the three-dimensional bridge structure in prior art.
In another embodiment, the shape of each electrode member is that two three-pointed hollow stars being connected by summit are constituted
Bowtie-shaped (dash area is solid slab), as shown in Fig. 7 (A).This way is advantageous in that can save former solid area
Material required for territory.In another embodiment, the shape of each electrode member is designed to three three be connected by summit
The combined shaped that dihedral is constituted, as shown in Fig. 7 (B), and can be arranged to make up the combination of electrodes as shown in Fig. 7 (C) further.Real
In business, the triangle in these electrode members can be equilateral triangle, also can be non-triangular.The control that aforementioned controllers 32 uses
The electrode pattern that method may be directly applied to Fig. 4 (A), Fig. 7 (A), Fig. 7 (B) are presented.
Be according to another embodiment of the present invention comprise N row electrode and control passage but do not comprise the mutual tolerance of controller 32
Formula contact panel.This N row electrode is generally aligned in the same plane and is not connected with each other.Every string electrode is the most each self-contained to be not attached to each other
Multiple electrode members of connecing (pattern as shown in Fig. 3 (A), Fig. 4 (A), Fig. 7 (A) or Fig. 7 (B), but can be not limited).These
Control passage to be generally aligned in the same plane with this N row electrode.Each electrode member that this N row electrode is comprised respectively correspond tos a control
Passage processed.A controller joined together by this mutual-capacitive touch panel sends through the plurality of control passage and drives signal and receive sense
Should result.
As it has been described above, the present invention proposes a kind of new mutual-capacitive touch panel and mutual capacitance type contactor control device, use certain position
In conplane electrode and control passage, it is not necessary to three-dimensional bridge structure, therefore can reduce processing procedure difficulty, save contactor control device
Production cost.
In sum, although the present invention discloses as above with preferred embodiment, and so it is not limited to the present invention.This
Bright art has usually intellectual, without departing from the spirit and scope of the present invention, when making various changes
With retouching.Therefore, protection scope of the present invention is defined by tbe claims and is as the criterion.
Claims (11)
1. a mutual-capacitive touch panel, in order to a controller Collaboration, comprise:
N row electrode, is generally aligned in the same plane and is not connected with each other, each self-contained multiple electricity bridged mutually of every string electrode
Pole element, wherein N is the integer more than 1；And
Multiple control passages, are generally aligned in the same plane with this N row electrode, and each electrode member that this N row electrode is comprised is each
Control passage corresponding to one, this controller through the plurality of control passage the plurality of electrode member sent drive signal or from
The plurality of electrode member receives and senses result more；
Wherein, the target electrode element in the plurality of electrode member receives one of this many drivings signal in a first time point,
And provide one of this many sensings result in one second time point, and around this target electrode element multiple electrode members in this
One time point provides this many sensings result, and the quantity around multiple electrode members of this target electrode element is at least three.
2. mutual-capacitive touch panel as claimed in claim 1, it is characterised in that the respective profile of each electrode member is
Rectangle.
3. mutual-capacitive touch panel as claimed in claim 1, it is characterised in that the respective profile of each electrode member is served as reasons
The bowtie-shaped that two black triangles that summit is connected are constituted.
4. mutual-capacitive touch panel as claimed in claim 1, it is characterised in that the respective profile of each electrode member is served as reasons
The bowtie-shaped that two three-pointed hollow stars that summit is connected are constituted.
5. mutual-capacitive touch panel as claimed in claim 1, it is characterised in that the respective profile of each electrode member is served as reasons
The combined shaped that three trianglees that summit is connected are constituted.
6. a mutual capacitance type contactor control device, comprises:
N row electrode, is generally aligned in the same plane, is not connected with each other, each self-contained multiple electricity bridged mutually of every string electrode
Pole element, wherein N is the integer more than 1；
Multiple control passages, are generally aligned in the same plane with this N row electrode, and each electrode member that this N row electrode is comprised is each
Passage is controlled corresponding to one；And
One controller, in order to send driving signal or from these electrodes through the plurality of control passage to the plurality of electrode member more
Element receives and senses result more；
Wherein, this controller target in a first time point sends one of this many drivings signal extremely the plurality of electrode member
Electrode member, and receive this many sensings result in this first time point from the multiple electrode members around this target electrode element,
And receiving one of this many sensings result in one second time point from this target electrode element, the quantity of the plurality of electrode member is at least
It is three.
7. mutual capacitance type contactor control device as claimed in claim 6, it is characterised in that the respective profile of each electrode member is
Rectangle.
8. mutual capacitance type contactor control device as claimed in claim 6, it is characterised in that the respective profile of each electrode member is served as reasons
The bowtie-shaped that two black triangles that summit is connected are constituted.
9. mutual capacitance type contactor control device as claimed in claim 6, it is characterised in that the respective profile of each electrode member is served as reasons
The bowtie-shaped that two three-pointed hollow stars that summit is connected are constituted.
10. mutual capacitance type contactor control device as claimed in claim 6, it is characterised in that the respective profile of each electrode member is
The combined shaped that three trianglees being connected by summit are constituted.
11. mutual capacitance type contactor control devices as claimed in claim 6, it is characterised in that this controller depends in these electrode members
Sequence selects different electrode members as this target electrode element.
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| CN201210092829.XA CN103365449B (en) | 2012-03-31 | 2012-03-31 | Mutual-capacitive touch panel and touch system |
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| CN201210092829.XA CN103365449B (en) | 2012-03-31 | 2012-03-31 | Mutual-capacitive touch panel and touch system |
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| CN103365449A CN103365449A (en) | 2013-10-23 |
| CN103365449B true CN103365449B (en) | 2016-08-24 |
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| CN103809810A (en) * | 2014-02-19 | 2014-05-21 | 深圳市华星光电技术有限公司 | Touch panel and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101593065A (en) * | 2008-05-27 | 2009-12-02 | 宸鸿光电科技股份有限公司 | Capacitive touch device and method thereof |
| CN102253752A (en) * | 2010-12-31 | 2011-11-23 | 友达光电股份有限公司 | Touch panel and touch display panel |
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| CN101561732B (en) * | 2008-04-18 | 2012-01-11 | 义隆电子股份有限公司 | Capacitive type touch pad for realizing two-dimensional application by using single layer sensor and positioning method thereof |
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| CN101593065A (en) * | 2008-05-27 | 2009-12-02 | 宸鸿光电科技股份有限公司 | Capacitive touch device and method thereof |
| CN102253752A (en) * | 2010-12-31 | 2011-11-23 | 友达光电股份有限公司 | Touch panel and touch display panel |
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