CN109739385A - The method and apparatus and touch screen of the identification of touch-control finger are carried out based on capacitance signal - Google Patents
The method and apparatus and touch screen of the identification of touch-control finger are carried out based on capacitance signal Download PDFInfo
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Abstract
The invention discloses a kind of method and apparatus and touch screen that the identification of touch-control finger is carried out based on capacitance signal, which comprises obtains capacitance profile when more referring to pressing touch screen and acquires data；The capacitance profile data that outside finger generates are determined according to the edge capacitance data in the acquisition data；After removing the capacitance profile data that the outside finger generates in the acquisition data, the intermediate finger of touch-control is identified.The poor touch-control effect as caused by distance is smaller or signal disturbance between referring to when more referring to touch-control can be improved using the present invention, such as the problems such as broken string and shake, to promote the touch-control effect and user experience of touch-control product.
Description
Technical field
The present invention relates to technical field of touch control, particularly relate to a kind of based on capacitance signal progress touch-control finger knowledge method for distinguishing
With device and touch screen.
Background technique
Electronic equipment is widely used and can provide miscellaneous function, including the transmitting of telephonic communication, electric message,
Handle the functions such as multimedia messages and access network.With the development of science and technology, electronic equipment is towards more polynary and humanized behaviour
The trend development of work.
In order to facilitate input information or electronic equipment size is reduced, many electronic equipments use touch panel as making now
User interface, for example, notebook computer touch panel or smartphone Touch Screen.User using finger or
It is Pointer contacts touch panel, with input signal to electronic equipment.Traditionally singly refer to that the gesture of single-point is fairly limited, because hereafter
To develop the technology for more referring to multiple spot.With refer to more the touch panel of multiple spot function can recognize simultaneously the multiple touch points of induction with
Input is set there are more evolutions.
In practical applications, it was found by the inventors of the present invention that existing touch-control product has when referring to more while crossing
When due to being closer between referring to, and is in the presence of similar broken string or shaking, influences user experience or even properties of product.Example
Such as, refer to scribing operation when effect diagram as shown in Figure 1, multiple fingers work at the same time scribing line；When multifingered manipulation due to away from
The phenomenon that broken string caused by the reasons such as excessive from smaller or signal interference or shake, the undesirable schematic diagram that causes to cross is as schemed
Shown in 2.
The present inventor analyzes the prior art, discovery the reason is that, capacitance kind touch-control refer to cross or
When work, when being closer between referring to, due to each finger can accumulation capacitance value around, and different fingers is caused to generate
Signal there are problems that interfering with each other, thus can not correct identification signal, lead to problems such as break and interfere, influence user
The performance of operation and product.For example, as shown in figure 3, multifingered manipulation, which will cause the capacitor under finger, to be caused when practical operation
With the change of the capacitance of center around, this makes multifingered manipulation and when finger is closer, and will generate between finger
Capacitance overlapping interference.In Fig. 4 using actual numerical value illustrate one three refer to scribing operation when distribution of capacitance values data,
There it can be seen that leading to three finger scribing operations actually depositing there are two peak value capacitor due to the capacitance being overlapped mutually
Leading to be mistaken for only that there are two fingers to carry out touch control operation, to generate the generation of similar broken string and jitter problem, is influencing to use
Family experience or even properties of product.
Summary of the invention
The invention proposes a kind of method and apparatus and touch screen that the identification of touch-control finger is carried out based on capacitance signal, improve
Refer to that the poor touch-control effect as caused by distance is smaller or signal disturbance between referring to when touch-control, such as broken string and shake etc. are asked more
Topic, to promote the touch-control effect and user experience of touch-control product.
Based on above-mentioned purpose, the present invention provides a kind of based on capacitance signal progress touch-control finger knowledge method for distinguishing, comprising:
It obtains capacitance profile when more referring to pressing touch screen and acquires data；
The capacitance profile data that outside finger generates are determined according to the edge capacitance data in the acquisition data；
After removing the capacitance profile data that the outside finger generates in the acquisition data, the intermediate hand of touch-control is identified
Refer to.
Wherein, the outside finger is specially up/down side finger；And
The edge capacitance data according in the acquisition data determine the capacitance profile data that outside finger generates, tool
Body includes:
According to the up/down edge capacitance data of the up/down side finger in the acquisition data, to weighing up the up/down side
After the lower/upper edge capacitance data of finger, the capacitance profile data of up/down side finger generation are obtained.
Alternatively, the outside finger is specially left/right side finger；And
The edge capacitance data according in the acquisition data determine the capacitance profile data that outside finger generates, tool
Body includes:
According to the left/right edge capacitance data of the left/right side finger in the acquisition data, to weighing up the left/right side
After the right/left edge capacitance data of finger, the capacitance profile data of left/right side finger generation are obtained.
Preferably, after the capacitance profile when referring to pressing touch screen the acquisition acquires data more, further includes:
More finger capacitance datas that Gaussian Profile extension obtains Gaussian Profile are made to the acquisition data；And
The edge capacitance data according in the acquisition data determine the capacitance profile data that outside finger generates, tool
Body includes:
According to the edge capacitance data in more finger capacitance datas of the Gaussian Profile, the outside finger of Gaussian Profile is determined
Capacitance data；
Reversed Gauss processing is done to the outside finger capacitance data of the Gaussian Profile, obtains what the outside finger generated
Capacitance profile data.
The present invention also provides a kind of devices that the identification of touch-control finger is carried out based on capacitance signal, comprising:
Capacitance signal acquisition module refers to that capacitance profile when pressing touch screen acquires data for obtaining more；
Outside finger capacitance profile determining module, for determining outside according to the edge capacitance data in the acquisition data
The capacitance profile data that finger generates；
Capacitance data strip module, the capacitance profile number generated for removing the outside finger from the acquisition data
According to rear, the intermediate finger of touch-control is identified.
Further, described device further include:
Gaussian Profile expansion module, for making more fingers electricity that Gaussian Profile extension obtains Gaussian Profile to the acquisition data
Hold data；And
The outside finger capacitance profile determining module is specifically used for according in more finger capacitance datas of the Gaussian Profile
Edge capacitance signal, determine the outside finger capacitance data of Gaussian Profile；To the outside finger capacitor number of the Gaussian Profile
According to reversed Gauss processing is done, the capacitance profile data that the outside finger generates are obtained.
The present invention also provides a kind of touch screens, comprising: carries out the identification of touch-control finger based on capacitance signal as described above
Device.
In technical solution of the present invention, after obtaining capacitance profile acquisition data when more referring to pressing touch screen, according to institute
It states the edge capacitance data in acquisition data and is assured that the capacitance profile data that outside finger generates；In turn from the acquisition
After removing the capacitance profile data that the outside finger generates in data, when facilitating mostly finger touch-control between finger distance it is smaller or
In the case where signal disturbance, touch-control finger is more precisely identified, especially identify the touching between two outside fingers
The intermediate finger of control, to obtain stable more finger working trajectories.
Further, in technical solution of the present invention, data also is acquired to capacitance profile when more referring to pressing touch screen and are carried out
Gaussian Profile extension, can obtain more abundant data details, convenient for doing the analysis of edge capacitance data；So as to more smart
Really determine the capacitance profile data that outside finger generates；Based on more it is accurate outside finger generate capacitance profile data,
It can more precisely identify touch-control finger, especially identify the intermediate finger of the touch-control between two outside fingers,
To obtain more stable more finger working trajectories.
Detailed description of the invention
Effect diagram when Fig. 1 is a kind of mostly finger scribing operation of the prior art；
When Fig. 2 is the multifingered manipulation of the prior art due to the smaller or signal interference of distance is excessive etc. caused by break
Or the schematic diagram of jitter phenomenon；
Capacitance when Fig. 3 is the multifingered manipulation of the prior art between finger is overlapped schematic diagram；
Distribution of capacitance values schematic diagram data when Fig. 4 is three finger scribing operation of the prior art；
Fig. 5 is a kind of method flow that the identification of touch-control finger is carried out based on capacitance signal that the embodiment of the present invention one provides
Figure；
Fig. 6 is the edge capacitance schematic diagram data for the outside finger that the embodiment of the present invention one provides；
Fig. 7 is a kind of device internal junction that the identification of touch-control finger is carried out based on capacitance signal that the embodiment of the present invention one provides
Structure block diagram；
Fig. 8 is a kind of method flow that the identification of touch-control finger is carried out based on capacitance signal provided by Embodiment 2 of the present invention
Figure；
Fig. 9 a is provided by Embodiment 2 of the present invention to singly referring to that data do showing for Gaussian Profile extension respectively for the capacitor of generation
It is intended to；
Fig. 9 b is that capacitance profile when more fingers provided by Embodiment 2 of the present invention to acquisition press touch screen acquires data
Make the schematic diagram that the outside finger capacitance data of Gaussian Profile is obtained after Gaussian Profile extension；
Figure 10 is inside a kind of device for carrying out the identification of touch-control finger based on capacitance signal provided by Embodiment 2 of the present invention
Structural block diagram.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in more detail.
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that when we claim element to be " connected " or " coupling
Connect " to another element when, it can be directly connected or coupled to other elements, or there may also be intermediary elements.In addition, this
In " connection " or " coupling " that uses may include being wirelessly connected or wireless coupling.Wording "and/or" used herein includes one
A or more associated whole for listing item or any cell and all combination.
It should be noted that all statements for using " first " and " second " are for differentiation two in the embodiment of the present invention
The non-equal entity of a same names or non-equal parameter, it is seen that " first " " second " only for the convenience of statement, does not answer
It is interpreted as the restriction to the embodiment of the present invention, subsequent embodiment no longer illustrates this one by one.
The present inventor is it is considered that the capacitance that each finger touch generates can generate other finger capacitances
It influences, in limited capacitive signal information, separates the capacitance signal that single finger generates, help referring to when mostly finger touch-control
Between in the case that distance is smaller or signal disturbance, more precisely identify touch-control finger, and then identify finger touch position,
To obtain stable more finger working trajectories.
The present inventor it is further contemplated that due to each finger pressing when capacitance variation distribution actually
It is that lower edges almost symmetry is distributed or left and right edges almost symmetry is distributed；Therefore, in the one side of something for obtaining a finger
Edge capacitance signal distributions data after, so that it may to weighing up the another half of edge capacitance signal distributions data of the finger, thus
Obtain the capacitance profile data generated when finger pressing.Obtaining capacitance profile acquisition when more referring to pressing touch screen as a result,
After data, the capacitance profile data that outside finger generates are assured that according to the edge capacitance data in the acquisition data；
And then after removing the capacitance profile data that the outside finger generates in the acquisition data, help referring to when mostly finger touch-control
Between in the case that distance is smaller or signal disturbance, more precisely identify touch-control finger, especially identify outer positioned at two
The intermediate finger of touch-control between the finger of side, to obtain stable more finger working trajectories.
The technical solution for embodiment that the invention will now be described in detail with reference to the accompanying drawings.The present invention specifically provides following two realities
Apply example.
Embodiment one
One kind that the embodiment of the present invention one provides is based on capacitance signal and carries out touch-control finger knowledge method for distinguishing, and detailed process is such as
Shown in Fig. 5, include the following steps:
Step S501: it obtains capacitance profile when more referring to pressing touch screen and acquires data.
In this step, it is collected when obtaining multiple fingers pressing touch screen, by refer to more press caused by capacitance signal
Distributed data, thus obtain refer to pressing touch screen when capacitance profile acquisition data.As shown in fig. 6, wherein pressing touches
It may include the pressing finger in outside in multiple fingers of screen, may also comprise the centre between the pressing finger in two outsides
Press finger.For ease of description, the pressing finger in outside is known as outside finger herein.For referring to the feelings of vertical setting of types scribing line more
Condition, outside finger can be the finger for coming upper and lower side；For referring to the case where horizontally-arranged scribing line more, the outside finger then row of can be
In the finger of left and right side.
Step S502: acquiring the edge capacitance data in data according to the capacitance profile of acquisition, determines that outside finger generates
Capacitance profile data.
In fact, being distributed in the capacitance data i.e. edge capacitance data at edge in capacitance profile acquisition data often by outer
Side finger generates, and is not influenced by the capacitor that the pressing of other fingers generates, and therefore, the numerical value of edge capacitance is can be fit to
The capacitance profile data that single finger generates；The capacitance profile data that the single finger that empirically obtains as a result, generates, can be with
The capacitor for the capacitance profile data that single finger generates will be met from capacitance profile acquisition data when more referring to pressing touch screen
Data are as edge capacitance data；Accordingly, can be according to edge capacitance data in this step, then after doing symmetrical treatment, obtain outer
The capacitance profile data that side finger generates.
Specifically, the case where as shown in fig. 6, for more referring to vertical setting of types scribing line, the capacitance profile that finger generates on the upside of determination
When data, the upper of the capacitance signal interference not generated by the pressing of other fingers in data can be acquired according to the capacitance profile of acquisition
The top edge capacitance data of side finger, to the lower edge capacitance data of the upside finger is weighed up, to obtain the upside hand
Refer to the capacitance profile data generated.
When the capacitance profile data that finger generates on the downside of determination, it can be acquired in data not according to the capacitance profile of acquisition
By the lower edge capacitance data for the downside finger that the capacitance signal that the pressing of other fingers generates interferes, to weighing up the downside finger
Top edge capacitance data after, obtain the capacitance profile data that the downside finger generates.
Similarly, for referring to the case where horizontally-arranged scribing line more, on the left of determination when the capacitance profile data of finger generation, Ke Yigen
According to the left side for the left side finger not interfered by the capacitance signal that the pressing of other fingers generates in the capacitance profile acquisition data of acquisition
Edge capacitance data, to the right hand edge capacitance data of the left side finger is weighed up, to obtain the capacitor that the left side finger generates
Distributed data.
When the capacitance profile data that finger generates on the right side of determination, it can be acquired in data not according to the capacitance profile of acquisition
By the right hand edge capacitance data for the right side finger that the capacitance signal that the pressing of other fingers generates interferes, to weighing up the right side finger
Left edge capacitance data, to obtain the capacitance profile data that the right side finger generates.
Step S503: the capacitance profile data that the outside finger generates are removed from the capacitance profile of acquisition acquisition data
Afterwards, the intermediate finger of touch-control is identified.
Specifically, the capacitance profile data that the outside finger generates are removed from the capacitance profile of acquisition acquisition data,
Obtain residual capacitance distributed data；I.e. for same collection point, the capacitance data acquired at the point is subtracted into outside finger and is generated
Capacitance profile data in be located at the collection point capacitance data to get arrive the collection point residual capacitance data.
In turn, as eliminating outside finger interference capacitors caused by intermediate finger in residual capacitance distributed data, because
This, can more precisely judge whether that there are also other fingers except side finger except as noted based on residual capacitance distributed data
The touch screen is pressed, existing recognition methods can be used in specific recognition methods, for example, judging residual capacitance distributed data
In there is capacitance to be greater than threshold value, and the capacitance occupied area for being greater than threshold value is greater than the set value, then is identified there are also except as noted
Other fingers except the finger of side press the touch screen；Conversely, then judging that no other fingers press the touch screen.Sentencing
It is disconnected go out when thering are other fingers to press the touch screen, then can accurately identify the intermediate finger of touch-control, and then according to capacitor
Peak value identifies the position of touch of finger, to obtain stable more finger working trajectories.
Based on above-mentioned method, what the embodiment of the present invention one provided be can be set in one of touch screen based on capacitor letter
Number carry out the identification of touch-control finger device, internal structure as shown in fig. 7, comprises: capacitance signal acquisition module 701, outside finger
Capacitance profile determining module 702, capacitance data strip module 703.
Capacitance signal acquisition module 701 is used to obtain capacitance profile acquisition data when more referring to pressing touch screen.
Outside finger capacitance profile determining module 702 is used for the capacitance profile obtained according to capacitance signal acquisition module 701
It acquires the edge capacitance data in data and determines the capacitance profile data that outside finger generates.Specifically, outside finger capacitor point
Cloth determining module 702 can be according to the up/down edge capacitance data of the up/down side finger in the acquisition data, to weighing up
After the lower/upper edge capacitance data for stating up/down side finger, the capacitance profile data of up/down side finger generation are obtained；Or
According to the left/right edge capacitance data of the left/right side finger in the acquisition data, to weigh up the right side of left/right side finger/
After left edge capacitance data, the capacitance profile data of left/right side finger generation are obtained.
Capacitance data strip module 703 is used to separate outside finger capacitance profile from capacitance profile acquisition data
After the capacitance profile data that the outside finger generates determined by determining module 702, the intermediate finger of touch-control is identified.Specifically
Ground, capacitance data strip module 703 can acquire the capacitance profile data that the outside finger generates from the capacitance profile
After removing in data, residual capacitance distributed data is obtained；Based on the residual capacitance distributed data, judge to have other fingers by
When pressing the touch screen, the intermediate finger of touch-control is identified.
In the technical solution of the embodiment of the present invention one, due to each finger pressing when capacitance variation distribution actually
It is that lower edges almost symmetry is distributed or left and right edges almost symmetry is distributed；Therefore, in the one side of something for obtaining a finger
Edge capacitance signal distributions data after, so that it may to weighing up the another half of edge capacitance signal distributions data of the finger, thus
Obtain the capacitance profile data generated when finger pressing.Obtaining capacitance profile acquisition when more referring to pressing touch screen as a result,
After data, the capacitance profile data that outside finger generates are assured that according to the edge capacitance data in the acquisition data；
And then after removing the capacitance profile data that the outside finger generates in the acquisition data, help referring to when mostly finger touch-control
Between in the case that distance is smaller or signal disturbance, more precisely identify touch-control finger, especially identify outer positioned at two
The intermediate finger of touch-control between the finger of side, to obtain stable more finger working trajectories.
Embodiment two
Provided by Embodiment 2 of the present invention a kind of based on capacitance signal progress touch-control finger knowledge method for distinguishing, detailed process is such as
Shown in Fig. 8, include the following steps:
Step S801: it obtains capacitance profile when more referring to pressing touch screen and acquires data.
In this step, it is collected when obtaining multiple fingers pressing touch screen, by refer to more press caused by capacitance signal
Distributed data, thus obtain refer to pressing touch screen when capacitance profile acquisition data.As shown in fig. 6, wherein pressing touches
It may include the pressing finger in outside in multiple fingers of screen, may also comprise the centre between the pressing finger in two outsides
Press finger.For ease of description, the pressing finger in outside is known as outside finger herein.For referring to the feelings of vertical setting of types scribing line more
Condition, outside finger can be the finger for coming upper and lower side；For referring to the case where horizontally-arranged scribing line more, the outside finger then row of can be
In the finger of left and right side.
Step S802: Gaussian Profile extension is made to the capacitance profile acquisition data of acquisition, obtains more fingers electricity of Gaussian Profile
Hold data.
It, can in this step, to obtaining in order to more clearly visible identify edge capacitance data in the next steps
The capacitance profile acquisition data taken carry out Data expansion, are analyzed with obtaining more abundant data.For example, Fig. 9 a is shown
To singly referring to that data make the schematic diagram of Gaussian Profile extension respectively for the capacitor of generation；And more fingers pressing to acquisition is shown in Fig. 9 b
After capacitance profile acquisition data when touch screen make Gaussian Profile extension, showing for the outside finger capacitance data of Gaussian Profile is obtained
It is intended to.Data volume is equivalent to 2~3 times of former acquisition data volume after it can be seen that extension in Fig. 9 b, more enriches data
Details, convenient for obtaining edge capacitance data in the next steps.
Step S803: according to the edge capacitance data in more finger capacitance datas of the Gaussian Profile, Gaussian Profile is determined
Outside finger capacitance data；Reversed Gauss processing is done to the outside finger capacitance data of the Gaussian Profile, is obtained described outer
The capacitance profile data that side finger generates.
In fact, since the i.e. edge capacitance data of capacitance data for being distributed in edge in capacitance profile acquisition data are often
It is generated, and is not influenced by the capacitor that the pressing of other fingers generates by outside finger, therefore, capacitance profile acquires the side in data
Edge capacitance data is the capacitance profile data that can be fit to single finger and generate；And similarly, it is extended by Gaussian Profile
Obtaining the edge capacitance data in more finger capacitance datas of Gaussian Profile afterwards is that can be fit to the capacitor generated to single finger
The capacitance data that distributed data obtains after Gaussian Profile extends；As a result, according to the capacitance profile number generated to single finger
Singly refer to capacitance data according to the Gaussian Profile obtained after Gaussian Profile extends, it can be from more finger capacitance datas of Gaussian Profile
Singly refer to capacitance data as edge capacitance data for meet Gaussian Profile；Accordingly, in this step, from the more of the Gaussian Profile
Refer to the capacitance data i.e. edge capacitance data for obtaining in capacitance data and being distributed in edge, is determined according to the edge capacitance data of acquisition
After the outside finger capacitance data of Gaussian Profile, reversed Gauss is done to the outside finger capacitance data of the Gaussian Profile and is handled,
Obtain the capacitance profile data that the outside finger generates.
For example, as shown in figure 9b, according to the top edge of the upside finger in more finger capacitance datas of Gaussian Profile electricity
Hold data and obtains institute after the lower edge capacitance data of the upside finger in the more finger capacitance datas for weighing up the Gaussian Profile
State the upside finger capacitance data of Gaussian Profile；The upside finger capacitance data of the Gaussian Profile is at reversed Gauss again
Reason obtains the capacitance profile data that the upside finger generates.
It is described to weighing up according to the lower edge capacitance data of the downside finger in more finger capacitance datas of the Gaussian Profile
After the top edge capacitance data of downside finger in more finger capacitance datas of Gaussian Profile, the downside hand of the Gaussian Profile is obtained
Refer to capacitance data；Reversed Gauss is to the downside finger capacitance data of the Gaussian Profile again to handle, and obtains the downside finger
The capacitance profile data of generation.
Alternatively, according to the left edge capacitance data of the left side finger in more finger capacitance datas of the Gaussian Profile, symmetrically
Out after the right hand edge capacitance data of the left side finger in more finger capacitance datas of the Gaussian Profile, the Gaussian Profile is obtained
Left side finger capacitance data；Reversed Gauss is to the left side finger capacitance data of the Gaussian Profile again to handle, and obtains the left side
The capacitance profile data that side finger generates.
It is described to weighing up according to the right hand edge capacitance data of the right side finger in more finger capacitance datas of the Gaussian Profile
After the left edge capacitance data of right side finger in more finger capacitance datas of Gaussian Profile, the right side hand of the Gaussian Profile is obtained
Refer to capacitance data；Reversed Gauss is to the right side finger capacitance data of the Gaussian Profile again to handle, and obtains the right side finger
The capacitance profile data of generation.
Step S804: the capacitance profile data that the outside finger generates are removed from the capacitance profile of acquisition acquisition data
Afterwards, the intermediate finger of touch-control is identified.
Specifically, the capacitance profile data that the outside finger generates are removed from the capacitance profile of acquisition acquisition data,
Obtain residual capacitance distributed data；In turn, intermediate finger is caused due to eliminating outside finger in residual capacitance distributed data
Interference capacitors therefore can more precisely judge whether that there are also side fingers except as noted based on residual capacitance distributed data
Except other fingers press the touch screen.When judging there are other fingers to press the touch screen, then can accurately know
Not Chu touch-control intermediate finger, and then the position of touch of finger is identified according to the peak value of capacitor, to obtain stable more fingers
Working trajectory.
Based on provided by Embodiment 2 of the present invention a kind of based on capacitance signal progress touch-control finger knowledge method for distinguishing, the present invention
What embodiment two provided can be set the device for carrying out the identification of touch-control finger based on capacitance signal in one of touch screen, internal
Structure is as shown in Figure 10, comprising: capacitance signal acquisition module 1001, Gaussian Profile expansion module 1002, outside finger capacitor point
Cloth determining module 1003, capacitance data strip module 1004.
Capacitance signal acquisition module 1001 is used to obtain capacitance profile acquisition data when more referring to pressing touch screen.
The capacitance profile that Gaussian Profile expansion module 1002 is used to obtain capacitance signal acquisition module 1001 acquires data
Make Gaussian Profile extension, obtains more finger capacitance datas of Gaussian Profile；
Described in outside finger capacitance profile determining module 1003 is used to be expanded according to Gaussian Profile expansion module 1002
Edge capacitance signal in more finger capacitance datas of Gaussian Profile determines the outside finger capacitance data of Gaussian Profile；To described
The outside finger capacitance data of Gaussian Profile does reversed Gauss processing, obtains the capacitance profile data that the outside finger generates.
Specifically, outside finger capacitance profile determining module 1003 can be according to more finger capacitance datas of the Gaussian Profile
In upside finger top edge capacitance data, under the upside finger in the more finger capacitance datas for weighing up the Gaussian Profile
After edge capacitance data, the upside finger capacitance data of the Gaussian Profile is obtained；Again to the upside finger of the Gaussian Profile
Capacitance data does reversed Gauss processing, obtains the capacitance profile data that the upside finger generates；Or according to the Gauss point
The lower edge capacitance data of downside finger in more finger capacitance datas of cloth, to the more finger capacitance datas for weighing up the Gaussian Profile
In downside finger top edge capacitance data after, obtain the downside finger capacitance data of the Gaussian Profile；Again to the height
The downside finger capacitance data of this distribution does reversed Gauss processing, obtains the capacitance profile data that the downside finger generates；Or
Person, according to the left edge capacitance data of the left side finger in more finger capacitance datas of the Gaussian Profile, to weighing up the Gauss
After the right hand edge capacitance data of left side finger in more finger capacitance datas of distribution, the left side finger electricity of the Gaussian Profile is obtained
Hold data；Reversed Gauss is to the left side finger capacitance data of the Gaussian Profile again to handle, and is obtained the left side finger and is generated
Capacitance profile data；Or the right hand edge capacitor number according to the right side finger in more finger capacitance datas of the Gaussian Profile
According to obtaining the height after the left edge capacitance data of the right side finger in the more finger capacitance datas for weighing up the Gaussian Profile
The right side finger capacitance data of this distribution；Reversed Gauss is to the right side finger capacitance data of the Gaussian Profile again to handle, and is obtained
The capacitance profile data generated to the right side finger.
The capacitance profile acquisition data that capacitance data strip module 1004 is used to obtain from capacitance signal acquisition module 1001
After the capacitance profile data that the outside finger that finger capacitance profile determining module 1003 obtains on the outside of middle removing generates, touch-control is identified
Intermediate finger.
In the technical solution of the embodiment of the present invention two, due to each finger pressing when capacitance variation distribution actually
It is that lower edges almost symmetry is distributed or left and right edges almost symmetry is distributed；Therefore, in the one side of something for obtaining a finger
Edge capacitance signal distributions data after, so that it may to weighing up the another half of edge capacitance signal distributions data of the finger, thus
Obtain the capacitance profile data generated when finger pressing.Obtaining capacitance profile acquisition when more referring to pressing touch screen as a result,
After data, the capacitance profile data that outside finger generates are assured that according to the edge capacitance data in the acquisition data；
And then after removing the capacitance profile data that the outside finger generates in the acquisition data, help referring to when mostly finger touch-control
Between in the case that distance is smaller or signal disturbance, more precisely identify touch-control finger, especially identify outer positioned at two
The intermediate finger of touch-control between the finger of side, to obtain stable more finger working trajectories.
Further, to obtain more accurate recognition result, in the technical solution of the embodiment of the present invention two, also mostly finger is pressed
It presses capacitance profile acquisition data when touch screen to carry out Gaussian Profile extension, more abundant data details can be obtained, be convenient for
Do the analysis of edge capacitance data；So as to more accurately determine the capacitance profile data that outside finger generates；Based on more
The capacitance profile data that accurate outside finger generates, can more precisely identify touch-control finger, especially identify and be located at
The intermediate finger of touch-control between two outside fingers, to obtain more stable more finger working trajectories.
Those skilled in the art of the present technique have been appreciated that in the present invention the various operations crossed by discussion, method, in process
Steps, measures, and schemes can be replaced, changed, combined or be deleted.Further, each with having been crossed by discussion in the present invention
Kind of operation, method, other steps, measures, and schemes in process may also be alternated, changed, rearranged, decomposed, combined or deleted.
Further, in the prior art to have and the step in various operations, method disclosed in the present invention, process, measure, scheme
It may also be alternated, changed, rearranged, decomposed, combined or deleted.
It should be understood by those ordinary skilled in the art that: the discussion of any of the above embodiment is exemplary only, not
It is intended to imply that the scope of the present disclosure (including claim) is limited to these examples；Under thinking of the invention, above embodiments
Or can also be combined between the technical characteristic in different embodiments, step can be realized with random order, and be existed such as
Many other variations of the upper different aspect of the invention, for simplicity, they are not provided in details.Therefore, it is all
Within the spirit and principles in the present invention, any omission, modification, equivalent replacement, improvement for being made etc. be should be included in of the invention
Within protection scope.
Claims (10)
1. one kind, which carries out touch-control finger based on capacitance signal, knows method for distinguishing characterized by comprising
It obtains capacitance profile when more referring to pressing touch screen and acquires data；
The capacitance profile data that outside finger generates are determined according to the edge capacitance data in the acquisition data；
After removing the capacitance profile data that the outside finger generates in the acquisition data, the intermediate finger of touch-control is identified.
2. the method according to claim 1, wherein the outside finger is specially up/down side finger；And
The edge capacitance data according in the acquisition data determine the capacitance profile data that outside finger generates, specific to wrap
It includes:
According to the up/down edge capacitance data of the up/down side finger in the acquisition data, to weighing up up/down side finger
Lower/upper edge capacitance data after, obtain the up/down side finger generation capacitance profile data.
3. the method according to claim 1, wherein the outside finger is specially left/right side finger；And
The edge capacitance data according in the acquisition data determine the capacitance profile data that outside finger generates, specific to wrap
It includes:
According to the left/right edge capacitance data of the left/right side finger in the acquisition data, to weighing up left/right side finger
Right/left edge capacitance data after, obtain the left/right side finger generation capacitance profile data.
4. the method according to claim 1, wherein capacitance profile when referring to pressing touch screen the acquisition more
After acquiring data, further includes:
More finger capacitance datas that Gaussian Profile extension obtains Gaussian Profile are made to the acquisition data；And
The edge capacitance data according in the acquisition data determine the capacitance profile data that outside finger generates, specific to wrap
It includes:
According to the edge capacitance data in more finger capacitance datas of the Gaussian Profile, the outside finger capacitor of Gaussian Profile is determined
Data；
Reversed Gauss processing is done to the outside finger capacitance data of the Gaussian Profile, obtains the capacitor that the outside finger generates
Distributed data.
5. according to the method described in claim 4, it is characterized in that, the outside finger is specially up/down side finger；And
Edge capacitance data in more finger capacitance datas according to the Gaussian Profile, determine the outside finger of Gaussian Profile
Capacitance data specifically includes:
According to the up/down edge capacitance data of the up/down side finger in more finger capacitance datas of the Gaussian Profile, to weighing up
After the lower/upper edge capacitance data for stating the up/down side finger in more finger capacitance datas of Gaussian Profile, the Gaussian Profile is obtained
Up/down side finger capacitance data.
6. according to the method described in claim 4, it is characterized in that, the outside finger is specially left/right side finger；And
Edge capacitance data in more finger capacitance datas according to the Gaussian Profile, determine the outside finger of Gaussian Profile
Capacitance data specifically includes:
According to the left/right edge capacitance data of the left/right side finger in more finger capacitance datas of the Gaussian Profile, to weighing up
After the right/left edge capacitance data for stating the left/right side finger in more finger capacitance datas of Gaussian Profile, the Gaussian Profile is obtained
Left/right side finger capacitance data.
7. -6 any method according to claim 1, which is characterized in that described to be removed from the acquisition data outside described
After the capacitance profile data that side finger generates, identifies the intermediate finger of touch-control, specifically includes:
The capacitance profile data that the outside finger is generated obtain residual capacitance distribution number after removing in the acquisition data
According to；
Based on the residual capacitance distributed data, when judging there are other fingers to press the touch screen, identify in touch-control
Between finger.
8. a kind of device for carrying out the identification of touch-control finger based on capacitance signal characterized by comprising
Capacitance signal acquisition module refers to that capacitance profile when pressing touch screen acquires data for obtaining more；
Outside finger capacitance profile determining module, for determining outside finger according to the edge capacitance data in the acquisition data
The capacitance profile data of generation；
Capacitance data strip module, the capacitance profile data generated for removing the outside finger from the acquisition data
Afterwards, the intermediate finger of touch-control is identified.
9. device according to claim 7, which is characterized in that further include:
Gaussian Profile expansion module, for making more finger capacitor numbers that Gaussian Profile extension obtains Gaussian Profile to the acquisition data
According to；And
The outside finger capacitance profile determining module is specifically used for according to the side in more finger capacitance datas of the Gaussian Profile
Edge capacitance signal determines the outside finger capacitance data of Gaussian Profile；The outside finger capacitance data of the Gaussian Profile is done
Reversed Gauss processing, obtains the capacitance profile data that the outside finger generates.
10. a kind of touch screen characterized by comprising carry out touch-control hand based on capacitance signal as claimed in claim 8 or 9
Refer to the device of identification.
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