CN108874196A - The induction amount compensation process and its touch panel of touch sensing - Google Patents
The induction amount compensation process and its touch panel of touch sensing Download PDFInfo
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- CN108874196A CN108874196A CN201710338918.0A CN201710338918A CN108874196A CN 108874196 A CN108874196 A CN 108874196A CN 201710338918 A CN201710338918 A CN 201710338918A CN 108874196 A CN108874196 A CN 108874196A
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- sense node
- induction
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- General Engineering & Computer Science (AREA)
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Abstract
The embodiment of the present invention provides the induction amount compensation process and its touch panel of a kind of touch sensing.The induction amount compensation process, it can be by a pseudo- finger circuits and to simulate when user's finger touches the imagined case of each sense node on touch sensing respectively, and the gain coefficient in relation to each sense node is acquired in turn, with ensure when sense node institute really when exterior object, which touches, produces inductance capacitance, current inductance capacitance can then be compensated using the gain coefficient of sense node, to offset gain effects brought by the basic capacitor of sense node.
Description
Technical field
This disclosure relates to which sensor technical field, can utilize the pseudo- finger having learned that in particular to one kind in advance
Circuit (fake finger circuit) and it is related when user's finger touches on touch sensing respectively to simulate
The induction amount compensation process and its touch panel of the capacitance variations degree of each sense node.
Background technique
At present touch panel be widely used in each electronic product in addition touch panel can also and display panel
(display panel) is combined, with and then as touch-sensitive display screen curtain.In general, touch panel includes that touch-control passes
Sensor and touch control controller (touch controller), the touch sensing are mostly passed again with the capacitance touching control of two dimensional form
Based on sensor, it includes having a plurality of line of induction (sensing lines) that arranges along a first direction, and along second party
To a plurality of driving line (driving lines) of arrangement.Wherein, the first direction hangs down each other with the second direction
Directly, therefore these lines of induction and these driving lines just staggeredly constitute out multiple sense nodes.It should be understood that the first party
It then can usually be indicated to the second direction with x-direction and y-direction.
In addition, when an exterior object (for example, finger of user) touches in a certain sense node and produces this sense
When answering the inductance capacitance of node, the inductance capacitance of this sense node must be then proportional to (Δ Cm/Cm).Wherein, Cm incudes section thus
The basic capacitor of point, that is, this sense node do not touched because of exterior object before the inductance capacitance that just probably already exists, and Δ Cm
Capacitance change caused by then for related this sense node institute due to exterior object touches.Due to being influenced by deficient manufacturing procedure,
Therefore the basic capacitor of each sense node may be not the same, then so that this exterior object is touched respectively not
It also will be different with the inductance capacitance generated in sense node.However, this basic capacitor because of each sense node is not
Identical caused difference phenomenon, will easily lead to touch control controller and judges by accident.
Summary of the invention
In view of this, the embodiment of the present invention provides the induction amount compensation process and its touch panel of a kind of touch sensing,
And it can be divided in advance using the pseudo- finger circuits having learned that simulate related user's finger of working as more particularly to a kind of
The induction amount compensation process and its touch panel of the capacitance variations degree of each sense node on touch sensing are not touched.
The embodiment of the present invention provides a kind of induction amount compensation process of touch sensing.The induction amount compensation process executes
In a touch control controller.Touch sensing includes a plurality of line of induction arranged along a first direction, and along second direction
The a plurality of driving line of arrangement.Wherein, first direction is mutually orthogonal to one another with second direction, and these lines of induction and these driving lines
Multiple sense nodes are then staggeredly constituted out, touch control controller is electrically connected at these lines of induction and these drivings of touch sensing
Line, and line is driven to these to transmit a driving signal (driving signal), then from these lines of induction receives to obtain
Inductance capacitance in relation to each sense node.The step of induction amount compensation process, is as follows.Firstly, by silent using at least one
Recognize circuit and to acquire the capacitance change in relation to each sense node.Then, become according to the capacitor of each sense node
Change amount and this default circuit, to acquire the gain coefficient corresponding to each sense node.Finally, for these induction sections
Point each for, when certain sense node institute because exterior object touches produce inductance capacitance when, then using this induction
The gain coefficient of node come to this sense node the inductance capacitance that is generated because exterior object touches compensate.
The embodiment of the present invention separately provides a kind of touch panel.The touch panel includes a touch sensing and a touch-control control
Device processed.Touch sensing includes a plurality of line of induction arranged along a first direction, and a plurality of drive arranged along second direction
Moving-wire, wherein first direction is mutually orthogonal to one another with second direction, and these lines of induction and these driving lines are then staggeredly constituted out
Multiple sense nodes, touch control controller be electrically connected at touch sensing these lines of induction and these driving lines, and to
It transmits a driving signal and drives line to these, then receive to obtain the inductance capacitance in relation to each sense node from these lines of induction.
Wherein, touch control controller is also by acquiring the capacitance variations in relation to each sense node using at least one default circuit
Amount, and according to the capacitance change of each sense node and this default circuit, to acquire corresponding to each sense node
A gain coefficient, and for each of these sense nodes, when in certain sense node institute because exterior object touches
And when producing inductance capacitance, touch control controller then using the gain coefficient of this sense node come to this sense node institute because of outside
The inductance capacitance that object is touched and generated compensates.
Preferably, the default circuit is a pseudo- finger circuits, and the puppet finger circuits are then sequentially coupled to each induction
Between the driving line and the line of induction of node, and it is used to that touch control controller is enabled to acquire related each sense node institute because of puppet
The inductance capacitance of finger circuits coupling and generation.
Preferably, the pseudo- finger circuits include first capacitor device, the second capacitor and an electronic building brick
(electronic component).Wherein, the first end of first capacitor device is sequentially coupled to one of these driving lines,
The first end of second capacitor is coupled to the second end of first capacitor device, and the second end of the second capacitor is then sequentially coupled to
One of these lines of induction.In addition, the first end of electronic building brick is coupled to the second end and the second capacitor of first capacitor device
Between the first end of device, and the second end of electronic building brick is then coupled to a ground voltage.Wherein, the electronic building brick can be by extremely
Few a passive component (passive component) is formed.
Preferably, the touch control controller executes following steps then with related every to acquire and using default circuit
The capacitance change of one sense node.For each of these sense nodes, it is coupled to when in pseudo- finger circuits
When between the driving line and the line of induction of certain sense node, touch control controller is then to transmit the drive of driving signal so far sense node
Moving-wire, with drive the line of induction of this sense node produce this sense node due to the coupling of pseudo- finger circuits the induced electricity that generates
Hold.Then, according to more each sense node due to pseudo- finger circuits couple the inductance capacitance that generates and each induction section
Ratio between the basic capacitor that point just probably already exists before not touching because of exterior object, to acquire related each sense node
Capacitance change.
Preferably, the touch control controller can also according to each sense node the sense that generates due to pseudo- finger circuits couple
Capacitor is answered, to acquire the sensing value in relation to each sense node, and according to these sensing values of these sense nodes, is come
Adjust at least one sensing threshold value in the touch control controller.Wherein, the sensing threshold value is for judging that touch sensing is
It is no have touched.
Be further understood that feature and technology contents of the invention to be enabled, please refer to below in connection with it is of the invention specifically
Bright and attached drawing, but these explanations are intended merely to illustrate the present invention with Detailed description of the invention book attached drawing, rather than right of the invention is wanted
It asks and makees any limitation.
Detailed description of the invention
Fig. 1 is the flow diagram of the induction amount compensation process of touch sensing provided by the embodiment of the present invention.
Fig. 2 is the function box schematic diagram of touch panel provided by the embodiment of the present invention.
Fig. 3 is the circuit diagram of the default circuit in the touch panel of Fig. 2.
Fig. 4 is related to acquire and using default circuit in the induction amount compensation process of the touch sensing of Fig. 1
The flow diagram of the capacitance change of each sense node.
Fig. 5 is the flow diagram of the induction amount compensation process of touch sensing provided by another embodiment of the present invention.
Fig. 6 be the touch sensing of Fig. 5 induction amount compensation process in acquire the sensing value in relation to each sense node,
And the flow diagram of at least one sensing threshold value is adjusted according to these sensing values.
Fig. 7 is the function box schematic diagram of touch panel provided by another embodiment of the present invention.
Fig. 8 is the circuit diagram of the converter in the touch panel of Fig. 7.
Specific embodiment
Hereinafter, the present invention is described in detail will be carried out by Detailed description of the invention various embodiments of the present invention.However, of the invention
Concept may embody in many different forms, and should not be construed as limited by exemplary embodiments set forth herein.In addition,
Same reference numbers can be used to indicate similar component in the accompanying drawings.
Firstly, Fig. 1 is the induction amount of touch sensing provided by the embodiment of the present invention please refer to Fig. 1 and Fig. 2 is arrived
The flow diagram of compensation method, and Fig. 2 is the function box schematic diagram of touch panel provided by the embodiment of the present invention.Its
In, the induction amount compensation process of the touch sensing of Fig. 1 is can be implemented in the touch control controller 22 of Fig. 2, but the present invention is simultaneously
The method of unlimited drawing 1 can be only implemented in the touch control controller 22 of Fig. 2.In addition, the touch panel 2 of Fig. 2 is also merely institute
One of implementation of the induction amount compensation process of touch sensing is stated, it is not intended to limiting the invention.
As shown in Fig. 2, touch panel 2 includes touch sensing 20 and touch control controller 22.Wherein, touch sensing 20
Comprising having a plurality of line of induction SA_1~SA_M arranged along a first direction, and a plurality of driving arranged along second direction
Line DA_1~DA_N, and the first direction is mutually orthogonal to one another with the second direction, therefore these lines of induction SA_1~SA_
M and these drivings line DA_1~DA_N staggeredly constitute out multiple sense node N_11~N_MN.It is noted that for convenience
Illustrate below, the first direction and second direction of the embodiment of the present invention are indicated with X-direction with Y-direction, but the present invention not with
This is limitation.In addition to this, line of induction SA_1~SA_M of the embodiment of the present invention and driving line DA_1~DA_M then use quantity
It is all 9 example to be illustrated (also that is, M and N are all equal to 9, and sense node has N_11~N_99 altogether), but the present invention is also
It is not limited system.
In addition, touch control controller 22 is electrically connected at these lines of induction SA_1~SA_9 and these drives of touch sensing 20
Moving-wire DA_1~DA_9, and to transmit a driving signal (not shown) to these drive line DA_1~DA_9, then from these
Line of induction SA_1~SA_9 receives to obtain the inductance capacitance (not shown) in relation to each sense node N_11~N_99.It is worth noting
, the touch control controller 22, which can be through pure hardware circuit, to be realized, or by hardware circuit arrange in pairs or groups firmware or
Software is realized, but the present invention is neither as limitation.To sum up, the present invention is not intended to limit the specific reality of touch control controller 22
Existing mode, therefore technician in the art should can carry out setting for related touch control controller 22 according to actual demand or application
Meter.
Furthermore, it is assumed that if by taking line of induction SA_8 and the staggered sense node N_88 of driving line DA_8 institute as an example, touching
Control controller 22 will be the driving line DA_8 of transmitting driving signal to sense node N_88, and again from sense node N_88's
Line of induction SA_8 receives to obtain the inductance capacitance about sense node N_88.However, due to when sense node N_88 have by
In the case that exterior object (for example, finger of user) touches, the inductance capacitance of sense node N_88 will be changed correspondingly also.Cause
This, touch control controller 22 can judge sense node N_88 (or touch sensing 20) and using this variation characteristic
Whether have and is touched.Because above-mentioned movement is the existing mutual inductance type capacitor (mutual of technician in the art institute
Capacitance type) sensing rule, so just no longer adding to repeat in this about its detail content.
Needing to be described is, as described in previous contents, since sense node N_ij is (also that is, i and j are respectively 1
Positive integer to 9) the inductance capacitance that is generated because exterior object touches be proportional to (Δ Cm (N_ij)/Cm (N_ij)), and because
To be influenced by deficient manufacturing procedure, so basic capacitor Cm (N_11)~Cm (N_99) of each sense node N_11~N_99 is again
It may be not the same.Therefore, though suffer from it is identical touch condition in the case where, each sense node N_11~N_99 institute
The inductance capacitance generated due to exterior object touches can also have with its basic capacitor Cm (N_11)~Cm (N_99) difference
Institute is different.That is, each sense node N_11~N_99 the inductance capacitance that is generated because exterior object touches, it will by
Change is generated to its own basic capacitor Cm (N_11)~Cm (N_99) influence.In this way, which this measure will likely result in touching
Control controller 22 is judged by accident, and in turn results in the operation of mistake.
Therefore, Fig. 2 is please referred to below to illustrate each step in Fig. 1.Firstly, in step s101, touch control controller
22 will be by acquiring the electricity in relation to each sense node N_11~N_99 using at least one default circuit (not shown)
Hold variation delta Cm (N_11)~Δ Cm (N_99).Then, in step s 103, touch control controller 22 is saved also according to each induction
The capacitance change Δ Cm (N_11) of point N_11~N_99~Δ Cm (N_99) and this default circuit, correspond to often to acquire
The gain coefficient gm (N_11) of one sense node N_11~N_99~gm (N_99).Finally, in step s105, for these senses
For each for answering node N_11~N_99, when producing inductance capacitance because exterior object touches in sense node N_ij institute
When, touch control controller 22 then using the gain coefficient gm (N_ij) of sense node N_ij come to sense node N_ij institute because of external object
The inductance capacitance that body is touched and generated compensates.
It is worth noting that, the present invention is not intended to limit specific implementation when compensating for inductance capacitance, therefore originally
Technical staff should can carry out relevant design according to actual demand or application in technical field.In addition, it is necessary to be described
It is, it is above-mentioned so-called " default circuit ", a puppet finger circuits in the previously known road of institute are also referred to, but the present invention is not with this
For limitation.In other words, enlightenment according to the above, technician in the art should be appreciated that, the embodiment of the present invention
One of central scope be just, simulate and using pseudo- finger circuits when user's finger (also that is, exterior object)
The imagined case on each sense node N_11~N_99 is touched respectively.Therefore, pseudo- finger circuits be must sequentially coupling
It is connected between the driving line DA_1~DA_9 and line of induction SA_1~SA_9 of each sense node N_11~N_99, and to touch
Control controller 22 can come acquire related each sense node N_11~N_99 the sense that is generated because the puppet finger circuits couple
Answer capacitor.
Then, the implementation for being directed to the default circuit of the present embodiment again is further introduced below.Please join together
Fig. 3 is read, Fig. 3 is the circuit diagram of the default circuit in the touch panel of Fig. 2.Wherein, part is identical with Fig. 2 in Fig. 3
Component is indicated with identical figure number, therefore just no longer adds to repeat in this.It is noted that the default circuit of the embodiment of the present invention
It can refer to pseudo- finger circuits 30 shown in Fig. 3, but the present invention is not limited thereto system.In addition, in order to facilitate following explanation,
The pseudo- finger circuits 30 of Fig. 3 are more only the examples used to be coupled between the driving line DA_8 and line of induction SA_8 of sense node N_88
Son is illustrated (also that is, contact P1 in Fig. 3 and contact P2 are then expressed as the be coupled to driving line of pseudo- finger circuits 30
Two contacts of DA_8 and line of induction SA_8), but the present invention is also not limited system.
As shown in figure 3, pseudo- finger circuits 30 (also that is, default circuit) include first capacitor device Cfd, the second capacitor Cfs
And electronic building brick 300.Wherein, the first end of first capacitor device Cfd is coupled to contact P1 (also that is, driving line DA_8), and the
The first end of two capacitor Cfs is coupled to the second end of first capacitor device Cfd, and the second end of the second capacitor Cfs then coupling
It is connected to contact P2 (also that is, line of induction SA_8).In practice, as described in previous contents, due to pseudo- finger circuits 30 be must be by
It is coupled to sequence between the driving line DA_1~DA_9 and line of induction SA_1~SA_9 of each sense node N_11~N_99, therefore
The first end of first capacitor device Cfd is sequentially coupled to one of these drivings line DA_1~DA_9, and the second capacitor
The second end of Cfs is then sequentially coupled to one of these lines of induction SA_1~SA_9.In addition to this, first capacitor device Cfd
And second capacitor Cfs unit then can respectively be, for example, 1pf, but the present invention is not limited thereto system.
In addition, the first end of electronic building brick 300 is coupled to the second end and the second capacitor Cfd of first capacitor device Cfd
Between first end, and the second end of electronic building brick 300 is then coupled to a ground voltage GND.However, just due to pseudo- finger circuits 30
It is that electronic building brick 300 for emulating the finger as a user, therefore in pseudo- finger circuits 30 can be for example by least one
Passive component is formed.In a kind of wherein application, electronic building brick 300 can be a resistor R_HBM, as shown in figure 3, and resistance
The unit of device R_HBM may be, for example, 1.5k Austria nurse；It or is that in other application, electronic building brick 300 can also be an inductance
The tandem compound etc. of device (not shown) or even resistor R_HBM and another capacitor (not shown).To sum up, of the invention
It is all not limited thereto system, therefore technician in the art should can carry out related electronics group according to actual demand or application
The design of part 300.
In this way, when being coupled to the driving line DA_8 of sense node N_88 in pseudo- finger circuits 30 (also that is, contact P1)
When between line of induction SA_8 (also that is, contact P2), the driving of driving signal to sense node N_88 is transmitted by touch control controller 22
Line DA_8 produces this sense node N_88 institute because of pseudo- 30 coupling of finger circuits to drive the line of induction SA_8 of sense node N_88
The inductance capacitance Cm ' for connecing and generating.Then, according to compare this sense node N_88 generated because pseudo- finger circuits 30 couple
Inductance capacitance Cm ' and this sense node N_88 institute not because exterior object touches or pseudo- finger circuits 30 couple before just early exist
Basic capacitor Cm (N_88) between ratio, touch control controller 22 just can acquire the capacitance variations in relation to this sense node N_88
It measures Δ Cm (N_88).
For example, the capacitance change Δ Cm (N_88) caused by pseudo- finger circuits 30 are on this sense node N_88,
Can the basic capacitor Cm (N_88) for example equal to sense node N_88 thus go to cut again Fig. 3 inductance capacitance Cm's ' as a result,
But system that the present invention is not limited thereto.To sum up, the present invention, which is not intended to limit related touch control controller 22, acquires induction section
The specific implementation of the capacitance change Δ Cm (N_ij) of point N_ij, therefore technician in the art should can be according to reality
Demand or application are to carry out relevant design.
On the other hand, Fig. 4 can be please referred to below to illustrate the step S101 in Fig. 1.Fig. 4 is the touch sensing of Fig. 1
The process of the capacitance change in relation to each sense node is acquired in induction amount compensation process and using default circuit
Schematic diagram.Wherein, the same pseudo- finger circuits 30 using Fig. 3 be will be in the method for Fig. 4 as the silent of the embodiment of the present invention
Recognize circuit, therefore please refer to figs. 2 and 3 together with benefit understanding.In addition, part process step identical with Fig. 1 is in Fig. 4 with identical
Figure number mark, therefore this will not be detailed here its details.
Specifically, may also include in the step S101 of Fig. 4 has step S401~step S403.Firstly, in step S401
In, for each of these sense nodes N_11~N_99, when being coupled to sense node N_ij in pseudo- finger circuits 30
Driving line DA_i and line of induction SA_j between when, touch control controller 22 is then to transmit the drive of driving signal to sense node N_ij
Moving-wire DA_i, to drive the line of induction SA_j of sense node N_ij to produce sense node N_ij institute because pseudo- finger circuits 30 couple
And the inductance capacitance Cm ' generated.
Then, in step S403, touch control controller 22 is then according to more each sense node N_11~N_99 institute because of puppet
Inductance capacitance Cm ' (the N_11)~Cm ' (N_99) and each sense node N_11~N_99 of the coupling of finger circuits 30 and generation
Not because before exterior object touches or the coupling of pseudo- finger circuits with regard between basic capacitor Cm (N_11)~Cm (N_99) existing for morning
Ratio, to acquire the capacitance change Δ Cm (N_11) in relation to each sense node N_11~N_99~Δ Cm (N_99).
More specifically, as shown in figure 3, due in pseudo- finger circuits 30 each component (also that is, first capacitor device Cfd,
Second capacitor Cfs and resistor R_HBM) it is all known parameters component, and touch control controller 22 can also acquire related pseudo- hand
Capacitance change Δ Cm (N_88) caused by referring to circuit 30 on this sense node N_88, therefore touch control controller 22 can lead to
It crosses using this relationship and to obtain the gain coefficient gm (N_88) for corresponding to sense node N_88.On it is worth noting that,
Embodiment used by stating also is herein only to illustrate, and it is not intended to limiting the invention.To sum up, the present invention is implemented
Also unlimited be formed with closes the specific implementation for obtaining the gain coefficient gm (N_ij) for arriving sense node N_ij to example, therefore the art
Middle technical staff can carry out relevant design according to actual demand or application.
In summary, by each sense node N_11~N_99 the inductance capacitance that is generated because exterior object touches,
Its own basic capacitor Cm (N_11)~Cm (N_99) influence will be will receive and generate change, therefore the emphasis of this part patent
Once being, can be emulated in advance and using known pseudo- finger circuits and obtain related each sense node N_11~
The capacitance change Δ Cm (N_11) of N_99~Δ Cm (N_99), and acquire in turn corresponding to each sense node N_11~
The gain coefficient gm (N_11) of N_99~gm (N_99), so that working as in sense node N_ij institute really due to exterior object touches
When producing current inductance capacitance, the touch control controller 22 of the embodiment of the present invention can utilize the gain system of sense node N_ij
Gm (N_ij) is counted to compensate to current inductance capacitance, is increased brought by its basic capacitor Cm (N_ij) with offseting whereby
Benefit influences.
As an example it is assumed that in the case where the gain coefficient gm (N_88) of sense node N_88 is 1.025, that is,
Say, sense node N_88 due to the coupling of pseudo- finger circuits 30 the inductance capacitance Cm ' that generates, then can be more obviously substantially electric by it
Hold the influence of Cm (N_88) and increases 0.025 times of gain more.Therefore, when in sense node N_88 institute really because exterior object touches
When touching and producing current inductance capacitance, the touch control controller 22 of the embodiment of the present invention can utilize the increasing of sense node N_88
Beneficial coefficient gm (N_88) compensates current inductance capacitance, to offset added 0.025 times of gain.
In addition to this, the touch control controller 22 of the embodiment of the present invention is also possible to utilize to judge each sense node N_11
Whether the inductance capacitance of~N_99 is lower than a threshold value, and to determine whether touch sensing 20 really has by exterior object institute
It touches.Therefore, when the inductance capacitance in view of each sense node N_11~N_99 is to will receive its own basic capacitor Cm (N_
11) influence of~Cm (N_99) and after generating change, the induction amount compensation side of touch sensing provided by the embodiment of the present invention
Method and its touch panel then can still be collocated with different technological means (for example, adaptively adjusting the threshold value),
To avoid touch control controller 22 to judge by accident whereby.
For example, referring to Fig. 5, the induction amount that Fig. 5 is touch sensing provided by another embodiment of the present invention is mended
The flow diagram of compensation method.Wherein, the method for Fig. 5 can be executed equally in the touch control controller 22 of Fig. 2, and also using figure
3 pseudo- finger circuits 30 are equally used as the default circuit of the present embodiment, therefore please refer to figs. 2 and 3 together is understood with benefit, therefore
Just no longer add to repeat about its detail content in this.In addition, part process step identical with Fig. 1 is in Fig. 5 with identical
Figure number mark, therefore also no longer add that its details is described in detail in this.
Specifically, the method compared to Fig. 1, the method for Fig. 5 further include having step S501~step S503.Firstly,
In step S501, touch control controller 22 can also be produced according to each sense node N_11~N_99 institute because pseudo- finger circuits 30 couple
Raw inductance capacitance Cm ' (N_11)~Cm ' (N_99), to acquire the sensing in relation to each sense node N_11~N_99
Value.In addition, touch control controller 22 then according to these sensing values of these sense nodes N_11~N_99, comes in step S503
Adjust at least one sensing threshold value (not shown) in touch control controller 22.
Needing to be described is, so-called " sensing threshold value " ", it also refers to be used to judge in above content to touch
Whether control sensor 20 really has the threshold value touched.In addition, enlightenment according to the above, technician in the art
It should be appreciated that arriving, step S103 and step S501~step S503 are the step of executing and do not conflict parallel.That is, working as
While touch control controller 22 just executes step S103, touch control controller 22 will be also using each sense node N_11~N_
99 due to the coupling of pseudo- finger circuits 30 inductance capacitance Cm ' (N_11)~Cm ' (N_99) for generating, saved to acquire each induction
The sensing value of point N_11~N_99, and according to these sensing values of these sense nodes N_11~N_99, it is original to adjust
It is used as judging whether touch sensing 20 really has the sensing threshold value touched.
It is worth noting that, for the induction amount compensation process of touch sensing provided by the embodiment of the present invention and its touching
For controlling panel, how to go to execute whether the subsequent inductance capacitance for judging each sense node N_11~N_99 is lower than the sensing
Threshold value is not but the one of the emphasis to be inquired into of this part patent, therefore above content will only serve as illustrating, and is below no longer more
It explains.In addition, it is to be understood that an at least internal storage location (not shown) has been also possible that in the touch panel 2 of Fig. 2,
And the internal storage location is then that can be used to be responsible for the storage sensing threshold value.
On the other hand, in order to further explain about step S501~step S503 realization details, the present invention is into one
Step provides one of embodiment.Please refer to Fig. 6 and Fig. 7 is arrived, Fig. 6 is the induction amount of the touch sensing of Fig. 5
The sensing value in relation to each sense node is acquired in compensation method, and at least one sensing threshold is adjusted according to these sensing values
The flow diagram of value, and Fig. 7 is the function box schematic diagram of touch panel provided by another embodiment of the present invention.Wherein,
The induction amount compensation process of the touch sensing of Fig. 6 can be implemented in the touch control controller 72 of Fig. 7, but the present invention and unlimited
The method of drawing 6 can be only implemented in the touch control controller 72 of Fig. 7.In addition, the touch panel 7 of Fig. 7 is also merely the touching
One of implementation of the induction amount compensation process of sensor is controlled, it is not intended to limiting the invention.
It is noted that identical with Fig. 5 process step in part is indicated in Fig. 6 with identical figure number, therefore just not in this
Add that its details is described in detail again.In addition, part is indicated with the same or similar component of Fig. 2 with the same or similar figure number in Fig. 7, therefore
Also no longer add to repeat in this.In addition to this, the same conduct of pseudo- finger circuits 30 of Fig. 3 will can be used in the touch panel 7 of Fig. 7
The default circuit of the present embodiment, therefore understood also referring to Fig. 3 with benefit.
Furthermore, it is understood that the touch control controller 22 compared to Fig. 2, the touch control controller 72 of Fig. 7 can also actively include to
Few a converter 700, at least an analog-digital converter 720 and a digital signal processor 740.In addition, in the implementation of Fig. 6
In example, step S501 and step S503 can also respectively include step S601 and step S603~step S605.Firstly, in step
In S601, touch control controller 72 will be using an at least converter 700, received from each sense node N_11~N_99 because of puppet
Inductance capacitance Cm ' (N_11)~Cm ' (N_99) of the coupling of finger circuits 30 and generation, and so as to exporting related each sense node
The sensing value VS1 (N_11) of N_11~N_99~VS1 (N_99).Secondly, touch control controller 72 is also available in step S603
An at least analog-digital converter 720, to output from each sense node N_11~N_99 of converter 700 institute because of pseudo- finger
Sensing value VS1 (N_11)~VS1 (N_99) that circuit 30 is coupled and generated is converted, to generate related each sense node N_
11~N_99 due to the coupling of pseudo- finger circuits 30 digital voltage signal VS2 (N_11)~VS2 (N_99) for generating.
Then, in step s 605, touch control controller 72 then utilizes digital signal processor 740, is saved according to these inductions
These digital voltage signals VS2 (N_11) of point N_11~N_99~VS2 (N_99), to adjust the sensing in touch control controller 72
Threshold value.It is worth noting that, in order to facilitate following explanation, the converter 700 and analog-digital converter 720 of the embodiment of the present invention
It is using quantity is all 1 example to be illustrated, but it is not intended to limiting the invention.For example, one kind is answered wherein
In, touch control controller 72 may also be comprising with converter 700 identical with line of induction SA_1~SA_9 quantity and simulation number
Word converter 720, and each converter 700 is to be respectively coupled to a line of induction SA_j and one of simulation numeral wherein
Between converter 720.Therefore, when pseudo- finger circuits 30 are coupled to sense node N_ij, the induction of sense node N_ij
Converter 700 corresponding to line SA_j will be produced so as to exporting related sense node N_ij institute because pseudo- finger circuits 30 couple
Raw sensing value VS1 (N_ij), and the analog-digital converter 720 of rear end then converts out related sense node N_ij more whereby
Due to the coupling of pseudo- finger circuits 30 the digital voltage signal VS2 (N_ij) that generates.
It or is that in other application, touch panel 7 is also possible to by single to allow using a switch (switch)
A converter 700 is commonly connected between multiple line of induction SA_1~SA_9 and single a analog-digital converter 720.For total
It, the present invention is all not limited thereto system, and technician in the art should can carry out phase according to actual demand or application
Close design.Enlightenment according to the above, technician in the art should be appreciated that the converter 700 can example
A for example convert of capacitor to voltage device, but the present invention is not limited thereto system.Therefore, in order to further explain about converter
700 realization details, invention further provides one of embodiments.Also referring to Fig. 8 is arrived, Fig. 8 is Fig. 7
The circuit diagram of converter in touch panel.
Needing to be described is, the embodiment of following used convert of capacitor to voltage devices is also only to lift herein
Example, it is not intended to limiting the invention, to sum up, the present invention does not also limit the specific implementation side of the convert of capacitor to voltage device
Formula.In addition, the pseudo- finger circuits 30 in Fig. 8 embodiment are used to be coupled to induction section in order to facilitate following explanation
Example between driving line DA_8 and the line of induction SA_8 of point N_88 is illustrated.Therefore, identical with Fig. 3 group of part in Fig. 8
Part is indicated with identical figure number, therefore no longer adds to repeat in this.
As shown in figure 8, converter 700 mainly includes an an operational amplifier OP and negative-feedback circuit LC.Wherein, operation is put
The inverting input terminal (inverting input) of big device OP is coupled to contact P2 (also that is, line of induction SA_8), and operational amplifier
The non-inverting input (non-inverting input) of OP is coupled to a reference voltage Vref, defeated with operational amplifier OP
Outlet then to export in relation to sense node N_88 due to the coupling of pseudo- finger circuits 30 the sensing value VS1 (N_88) that generates.Separately
Outside, negative-feedback circuit LC is coupled between the inverting input terminal and output end of operational amplifier OP, and it is via parallel with one another
Third capacitor Cf and a resistor Rf are formed.
According to the above it is found that for each of these sense nodes N_11~N_99, in practice, when feeling
When node N_ij institute being answered to produce inductance capacitance Cm ' (N_ij) because of the coupling of pseudo- finger circuits 30, the reverse phase of operational amplifier OP
Input terminal be coupled to line of induction SA_j corresponding to sense node N_ij, and with the output end of operational amplifier OP then to
Export in relation to sense node N_ij due to the coupling of pseudo- finger circuits 30 the sensing value VS1 (N_ij) that generates.However, due to capacitor
The operating principle of electric pressure converter is also existing by technician in the art, therefore about operational amplifier OP and bears
The detail content of feed circuit LC is just no longer added to repeat in this.
In summary, since digital signal processor 740 can finally acquire related each sense node N_11~N_99
Due to the coupling of pseudo- finger circuits 30 digital voltage signal VS2 (N_11)~VS2 (N_99) for generating, therefore Digital Signal Processing
The sensing threshold value that device 740 is adjusted needed for can intuitively being designed and the data information digitized using these.
It is worth noting that, for touch sensing provided by the embodiment of the present invention induction amount compensation process and its touch panel and
How speech goes design adjustment sensing threshold value, is not but the one of the emphasis to be inquired into of this part patent, therefore above content will be only
It is i.e. no longer below to explain as signal more.
In conclusion the induction amount compensation process and its touch panel of touch sensing provided by the embodiment of the present invention,
It can be the pseudo- finger circuits by previously known road and to simulate when user's finger is touched respectively in touch sensing
On each sense node imagined case, and the gain coefficient in relation to each sense node is acquired in turn, to ensure to work as
In a certain sense node really when exterior object, which touches, produces current inductance capacitance, then can utilize this sense node
Gain coefficient current inductance capacitance is compensated, to be offseted brought by the basic capacitor of this sense node whereby
Gain effects, and avoid the generation of erroneous judgement.
The above, the only preferred embodiments of the disclosure, and and feature of the invention is not limited thereto, this
The technical staff in field within the field of the present invention, can think easily and changes or modifications, can all cover in the claims
In.
Claims (18)
1. a kind of induction amount compensation process of touch sensing, is implemented in a touch control controller, the touch sensing includes
Along a plurality of line of induction that a first direction arranges, and a plurality of driving line arranged along a second direction, wherein described the
One direction is mutually orthogonal to one another with the second direction, and a plurality of line of induction and a plurality of driving line interlock constitute out it is more
A sense node, the touch control controller be electrically connected at the touch sensing a plurality of line of induction and a plurality of drive
Moving-wire, and transmitting a driving signal to a plurality of driving line, then receive to obtain related institute from a plurality of line of induction
State an inductance capacitance of each of multiple sense nodes, which is characterized in that the induction amount compensation process includes：
By the capacitance variations of each for acquiring related the multiple sense node using at least one default circuit
Amount；
It is corresponding to acquire according to the capacitance change of each and the default circuit of the multiple sense node
In the gain coefficient of each of the multiple sense node；And
For each of the multiple sense node, generated due to an exterior object touches when in the sense node institute
Out when the inductance capacitance, then using the gain coefficient of the sense node come to sense node institute because of the outside
The inductance capacitance that object is touched and generated compensates.
2. induction amount compensation process as described in claim 1, which is characterized in that wherein the default circuit is a pseudo- finger electricity
Road, the puppet finger circuits are then sequentially coupled to the driving line of each and the line of induction of the multiple sense node
Between, and be used to so that the touch control controller acquires each institute of related the multiple sense node because of the puppet
The inductance capacitance of finger circuits coupling and generation.
3. induction amount compensation process as claimed in claim 2, which is characterized in that wherein the pseudo- finger circuits include：
One first capacitor device has a first end and a second end, wherein the first end of the first capacitor device is then sequentially
It is coupled to one of described a plurality of driving line；
One second capacitor has a first end and a second end, wherein the first end of second capacitor is coupled to
The second end of the first capacitor device, and the second end of second capacitor is then sequentially coupled to a plurality of sense
Answer one of line；And
One electronic building brick a, wherein first end of the electronic building brick is coupled to the second end and the institute of the first capacitor device
It states between the first end of the second capacitor, and a second end of the electronic building brick is then coupled to a ground voltage.
4. induction amount compensation process as claimed in claim 3, which is characterized in that wherein the electronic building brick is passive by least one
Component is formed.
5. induction amount compensation process as claimed in claim 4, which is characterized in that wherein by utilizing the default circuit
To further include in the step of acquiring the capacitance change of each in relation to the multiple sense node：
For each of the multiple sense node, when the institute for being coupled to the sense node in the pseudo- finger circuits
When stating between driving line and the line of induction, the touch control controller is then to transmit the driving signal to the sense node
The driving line, to drive the line of induction of the sense node to produce sense node institute because of the pseudo- finger electricity
The inductance capacitance of road coupling and generation；And
According to more the multiple sense node each the induced electricity that generates by the pseudo- finger circuits coupling due to
Hold and the multiple sense node each do not touched because of the exterior object before with regard between already present one basic capacitor
Ratio, to acquire the capacitance change of each of related the multiple sense node.
6. incuding amount compensation process as claimed in claim 5, which is characterized in that the induction amount compensation process further includes：
According to the multiple sense node each the inductance capacitance that generates by the pseudo- finger circuits coupling due to,
Acquire the sensing value of each of related the multiple sense node；And
According to the sensing value of the multiple sense node, to adjust at least one sensing threshold value in the touch control controller,
Wherein the sensing threshold value is touched for judging whether the touch sensing has.
7. induction amount compensation process as claimed in claim 6, which is characterized in that wherein according to the multiple sense node
Each the inductance capacitance that generates by the pseudo- finger circuits coupling due to, to acquire in relation to the multiple sense node
The sensing value of each the step of in, further include：
Using an at least converter, each institute received from the multiple sense node produces because of the pseudo- finger circuits coupling
The raw inductance capacitance, and the sensing value of each so as to exporting related the multiple sense node.
8. induction amount compensation process as claimed in claim 7, which is characterized in that wherein according to the multiple sense node
The sensing value, come adjust in the touch control controller it is described at least one sensing threshold value the step of in, further include：
Using an at least analog-digital converter, to each institute exported from the multiple sense node of the converter
The sensing value generated by the pseudo- finger circuits coupling is converted, so as to generating related the multiple sense node
Each the digital voltage signal that generates by the pseudo- finger circuits coupling due to；And
Using a digital signal processor, according to the digital voltage signal of the multiple sense node, to adjust the touching
Control the sensing threshold value in controller.
9. induction amount compensation process as claimed in claim 7, which is characterized in that wherein the converter turns for a capacitance voltage
Parallel operation, and it includes：
One operational amplifier has an inverting input terminal, a non-inverting input and an output end, the institute of the operational amplifier
It states non-inverting input and is coupled to a reference voltage, wherein for each of the multiple sense node, when described
When sense node institute produces the inductance capacitance because of the pseudo- finger circuits coupling, the reverse phase of the operational amplifier
Input terminal is just coupled to the line of induction corresponding to the sense node, and the output end of the operational amplifier is then
To export in relation to the sense node the sensing value that generates by the pseudo- finger circuits coupling due to；And
One negative-feedback circuit is coupled between the inverting input terminal and the output end of the operational amplifier, wherein described
Negative-feedback circuit is formed via a third capacitor parallel with one another and a resistor.
10. a kind of touch panel, which is characterized in that the touch panel includes：
One touch sensing, including a plurality of line of induction arranged along a first direction, and along second direction arrangement
A plurality of driving line, wherein the first direction is mutually orthogonal to one another with the second direction, and a plurality of line of induction with it is described
A plurality of driving line staggeredly constitutes out multiple sense nodes；And
One touch control controller is electrically connected at a plurality of line of induction and a plurality of driving line of the touch sensing, and
And transmitting a driving signal to a plurality of driving line, then receive to obtain related the multiple sense from a plurality of line of induction
Answer an inductance capacitance of each of node；
Wherein, the touch control controller is also by acquiring related the multiple sense node using at least one default circuit
The capacitance change of each, and according to the capacitance change of each of the multiple sense node and institute
Default circuit is stated, to acquire the gain coefficient of each corresponding to the multiple sense node；And
For each of the multiple sense node, generated due to an exterior object touches when in the sense node institute
Out when the inductance capacitance, the touch control controller then saves the induction using the gain coefficient of the sense node
Point the inductance capacitance that is generated due to the exterior object touches compensate.
11. touch panel as claimed in claim 10, which is characterized in that wherein the default circuit is a pseudo- finger circuits,
It is described puppet finger circuits be then sequentially coupled to the multiple sense node the driving line of each and the line of induction it
Between, and be used to so that the touch control controller acquires each institute of related the multiple sense node because of the pseudo- hand
The inductance capacitance for referring to circuit coupling and generating.
12. touch panel as claimed in claim 11, which is characterized in that wherein the pseudo- finger circuits include：
One first capacitor device has a first end and a second end, wherein the first end of the first capacitor device is then sequentially
It is coupled to one of described a plurality of driving line；
One second capacitor has a first end and a second end, wherein the first end of second capacitor is coupled to
The second end of the first capacitor device, and the second end of second capacitor is then sequentially coupled to a plurality of sense
Answer one of line；And
One electronic building brick a, wherein first end of the electronic building brick is coupled to the second end and the institute of the first capacitor device
Between the first end for stating the second capacitor, and a second end of the electronic building brick is then coupled to a ground voltage.
13. touch panel as claimed in claim 12, which is characterized in that wherein the electronic building brick is by an at least passive component
It is formed.
14. touch panel as claimed in claim 13, which is characterized in that wherein the touch control controller execute following steps with
The capacitance change of each of related the multiple sense node is acquired and using the default circuit：
For each of the multiple sense node, when the institute for being coupled to the sense node in the pseudo- finger circuits
When stating between driving line and the line of induction, the touch control controller is then to transmit the driving signal to the sense node
The driving line, to drive the line of induction of the sense node to produce sense node institute because of the pseudo- finger electricity
The inductance capacitance of road coupling and generation；And
According to more the multiple sense node each the induced electricity that generates by the pseudo- finger circuits coupling due to
Hold and the multiple sense node each do not touched because of the exterior object before with regard between already present one basic capacitor
Ratio, to acquire the capacitance change of each of related the multiple sense node.
15. touch panel as claimed in claim 14, which is characterized in that wherein the touch control controller is also according to the multiple
Each of sense node the inductance capacitance that generates by the pseudo- finger circuits coupling due to, to acquire in relation to described more
One sensing value of each of a sense node, and according to the sensing value of the multiple sense node, it is described to adjust
In touch control controller at least one sensing threshold value, wherein the sensing threshold value be for judge the touch sensing whether have by
It touches.
16. touch panel as claimed in claim 15, which is characterized in that wherein the touch control controller execute following steps with
According to the multiple sense node each the inductance capacitance that generates by the pseudo- finger circuits coupling due to, to obtain
To the sensing value of each of related the multiple sense node：
Using an at least converter, each institute received from the multiple sense node produces because of the pseudo- finger circuits coupling
The raw inductance capacitance, and the sensing value of each so as to exporting related the multiple sense node.
17. touch panel as claimed in claim 16, which is characterized in that wherein the touch control controller execute following steps with
According to the sensing value of the multiple sense node, to adjust at least one sensing threshold value in the touch control controller：
Using an at least analog-digital converter, to each institute exported from the multiple sense node of the converter
The sensing value generated by the pseudo- finger circuits coupling is converted, so as to generating related the multiple sense node
Each the digital voltage signal that generates by the pseudo- finger circuits coupling due to；And
Using a digital signal processor, according to the digital voltage signal of the multiple sense node, to adjust the touching
Control the sensing threshold value in controller.
18. touch panel as claimed in claim 16, which is characterized in that wherein the converter is a convert of capacitor to voltage
Device, and it includes：
One operational amplifier has an inverting input terminal, a non-inverting input and an output end, the institute of the operational amplifier
It states non-inverting input and is coupled to a reference voltage, wherein for each of the multiple sense node, when described
When sense node institute produces the inductance capacitance because of the pseudo- finger circuits coupling, the reverse phase of the operational amplifier
Input terminal is just coupled to the line of induction corresponding to the sense node, and the output end of the operational amplifier is then
To export in relation to the sense node the sensing value that generates by the pseudo- finger circuits coupling due to；And
One negative-feedback circuit is coupled between the inverting input terminal and the output end of the operational amplifier, wherein described
Negative-feedback circuit is formed via a third capacitor parallel with one another and a resistor.
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