CN110036362A

CN110036362A - Touch detecting method and touch detecting apparatus

Info

Publication number: CN110036362A
Application number: CN201780000666.9A
Authority: CN
Inventors: 李向华; 彭永豪; 毛栋良
Original assignee: Shenzhen Goodix Technology Co Ltd
Current assignee: Shenzhen Goodix Technology Co Ltd
Priority date: 2017-07-18
Filing date: 2017-07-18
Publication date: 2019-07-19
Anticipated expiration: 2037-07-18
Also published as: WO2019014858A1; CN110036362B

Abstract

This application discloses a kind of touch detecting method and touch detecting apparatus.This method comprises: determining touch area according to the change amount signal of multiple capacitive sensing nodes；When there are multiple touch areas, according to the regularity of distribution of the change amount signal of the capacitive sensing node of multiple touch area, determine that multiple touch area is singly to refer to touch or refer to more to touch.In this way, even if also can accurately be identified by the regularity of distribution of the change amount signal of capacitor sense node on touch area in the case where imperfect earth and singly refer to touch and mostly finger touch.

Description

Touch detecting method and touch detecting apparatus

Technical field

This application involves information technology fields, and more particularly, to a kind of touch detecting method and touch detecting apparatus.

Background technique

With the development of human machine interface technologies, touch sensible technology is widely used because of the comfort and convenience of its operation.Especially in field of consumer electronics such as laptop, mobile phone, MP3, touch tablet (Touch Pad), touch screen, touch controlled key are widely used in this electronic product.In touch technology, relatively advanced is capacitance touching control technology.

Capacitive touch screen is made of touch sensor and touch controller, and the panel of touch sensor is made of one group of line of induction and one group of driving line, and the position of these driving lines and line of induction intersection constitutes several capacitive sensing nodes.When there is touch, the capacitance of the capacitive sensing node of corresponding position can change, and touch controller can determine corresponding touch location by the variation of detection capacitor in real time, the point coordinate for calculating touch location corresponding panel, to generate corresponding touch event.When finger and preferable touch panel ground connection, what finger touched is true capacitance, and the variable quantity for touching front and back capacitor can truly react touch location.

But when finger and when touch panel imperfect earth, there are deviations between capacitance and actual value that capacitive sensing node may be made to export.In this case, it is that a touch area may will form multiple touch areas originally if the larger such as thumb of touch area touches, singly refers to that touch may be identified as referring to more and touch, that is, occur tearing a phenomenon open, to influence user experience.Therefore how in imperfect earth, identification singly refers to touch and mostly finger touches, and becomes a urgent problem to be solved.

Summary of the invention

The embodiment of the present application provides a kind of touch detecting method and device, can accurately identify and singly refer to touch and refer to touch more.

In a first aspect, providing a kind of touch detecting method, comprising: according to the change amount signal of multiple capacitive sensing nodes, determine touch area；

When there are multiple touch areas, according to the signal of the capacitive sensing node of the multiple touch area The regularity of distribution of variable quantity determines the multiple touch area singly to refer to touch or refer to more and touch.

In this way, singly referring to that touch is touched with mostly finger by the regularity of distribution identification of the change amount signal of capacitor sense node on touch area, it also can accurately be distinguished in imperfect earth and singly refer to touch and mostly finger touch.

When only one touch area, it is determined that singly to refer to touch.It then may be to refer to touch or singly refer to touch when there are multiple touch areas more.In imperfect earth, the regularity of distribution of the change amount signal of capacitive sensing node is similar to the regularity of distribution of change amount signal of capacitive sensing node when more referring to touch when singly referring to touch, it is likely that be identified as referring to touch more.Therefore, it is necessary to the regularities of distribution according to the change amount signal of the capacitive sensing node of multiple touch area, to identify that multiple touch area is singly to refer to touch or refer to touch more.

It is touched for singly referring to touch and refer to more, it is generally the case that the row or column where more referring to the capacitive sensing node for having semaphore to change on the edge of touch area when touching will appear jump.And when singly referring to touch, playing a value point and suffering compact for edge generally will form the shape of approximate ellipse, every a line both ends of touch area play first change amount signal and link up one ellipse of approximation greater than the capacitive sensing node of second threshold.

In some possible implementations, the regularity of distribution of the change amount signal of the capacitive sensing node according to the multiple touch area, the multiple touch area is determined singly to refer to touch or refer to more and touch, comprising: determines whether the capacitive sensing node close to the edge of the target area of the multiple touch area composition meets target distribution rule；If the capacitive sensing node close to the target area edge meets the target distribution rule, determine that the multiple touch area is to refer to touch more.

Further, if the capacitive sensing node close to the target area edge is unsatisfactory for target distribution rule, although it is single-touch that there is a strong possibility at this time, but in order to more accurately judge whether multiple touch area is single-touch, it can also be further according to the numerical characteristics of the change amount signal of the capacitive sensing node of touch area when singly referring to touch, to determine whether multiple touch area is singly to refer to touch.

In some possible implementations, the method also includes: if the capacitive sensing node close to the target area edge is unsatisfactory for the target distribution rule, then according to the change amount signal of the capacitive sensing node close to the target area center, further determine that the multiple touch area is singly to refer to touch or refer to more to touch.

In some possible implementations, the target distribution rule are as follows: in the target area, the column where first edge node in i-th row capacitive sensing node, it is greater than first threshold with the distance between the column where the first edge node in i+1 row capacitive sensing node, and second in the column where the second edge node in the i-th row capacitive sensing node, with the i+1 row capacitive sensing node The distance between column where fringe node are greater than the first threshold, wherein, the first edge node is the capacitive sensing node that left end plays that first change amount signal is greater than second threshold, the second edge node is the capacitive sensing node that right end plays that first change amount signal is greater than the second threshold, the value of i is 1 to P, and P is total line number of capacitive sensing node in the target area.

In some possible implementations, change amount signal of the basis close to the capacitive sensing node at the target area center, further determine that the multiple touch area is singly to refer to touch or refer to more to touch, comprise determining that the M row close to the target area center × N arranges a capacitive sensing node, M and N are preset positive integer；Calculate the average value of the change amount signal of other capacitive sensing nodes in the average value and the target area of the M row × N column capacitive sensing node change amount signal in addition to the M row × N arranges a capacitive sensing node；If the M row × N, which arranges the average value of the change amount signal of capacitive sensing node, determines the multiple touch area then less than the average value of the change amount signal of other capacitive sensing nodes singly to refer to touch；If the M row × N arranges the average value of the change amount signal of capacitive sensing node, more than or equal to the average value of the change amount signal of other capacitive sensing nodes, then determine that the multiple touch area is to refer to touch more.

It should be understood that here can also be by judge the change in location curve of first edge node and second edge node in multirow capacitive sensing node, to determine that multiple touch area is singly to refer to touch or mostly finger touch.The change in location curve can be the curve that a columns changes with line number.By taking the regularity of distribution of the first edge node in multirow capacitive sensing node as an example, the first edge node of wherein each row is that the capacitive sensing node that first change amount signal is greater than second threshold is played in left end in the row.When successively increasing with line number, if there is obvious jump between columns where first edge node in adjacent rows, i.e. curve mutates, then determines that multiple touch area is to refer to touch more；If changing gently between the columns where first edge node in adjacent rows, do not jump, the trend that recurrence increaseds or decreases is presented in curve, then determines multiple touch area singly to refer to touch.

It should also be understood that the target area not necessarily regular figure being made of multiple touch area, the capacitive sensing node of target area, which is also not necessarily, to be distributed according to m row × n column rule.

It will also be understood that, the target distribution rule may be: in the region of interest, the column where first edge node in i-th row capacitive sensing node, it is less than first threshold with the distance between the column where the first edge node in i+1 row capacitive sensing node, and the distance between column where the second edge node in the column where the second edge node in the i-th row capacitive sensing node, with the i+1 row capacitive sensing node are less than first threshold.Wherein, which is the capacitive sensing node that left end plays that first change amount signal is greater than second threshold, which is that right end plays first signal intensity Amount is greater than the capacitive sensing node of the second threshold.At this moment, if first edge node and/or second edge node in the multirow capacitive sensing node of target area are unsatisfactory for target distribution rule, determine that multiple touch area is to refer to touch more；If the first edge node and/or second edge node in multirow capacitive sensing node meet target distribution rule, then according to the change amount signal of the capacitive sensing node close to the target area center, further determine that multiple touch area is singly to refer to touch or refer to more to touch.

It should also be understood that can also successively be judged for the capacitive sensing node of each column by way of by column scan in the embodiment of the present application, so that it is determined that whether edge capacitance sense node meets target distribution rule.At this moment, the target distribution rule for example can be with are as follows: in the target area, the row where first edge node in kth column capacitance sense node, it is greater than first threshold with the distance between the row where the first edge node in+1 column capacitance sense node of kth, and in the kth column capacitance sense node and the row where fringe node, it is greater than first threshold with the distance between the row where the second edge node in+1 column capacitance sense node of kth, wherein the value of k is 1 to N, total columns of capacitive sensing node in the target area N.The first edge node is the capacitive sensing node for playing first change amount signal from bottom to top and being greater than second threshold.The second edge node is the capacitive sensing node for playing first change amount signal from top to bottom and being greater than second threshold.At this moment, if first edge node and/or second edge node in the multiple row capacitive sensing node of target area meet target distribution rule, determine that multiple touch area is to refer to touch more；Otherwise according to the change amount signal of the capacitive sensing node close to the target area center, further determine that multiple touch area is singly to refer to touch or refer to more to touch.

The embodiment is analyzed by the change amount signal of the capacitive sensing node to target area, judge whether the feature for meeting " intermediate small surrounding is big ", that is change amount signal of the change amount signal of the capacitive sensing node at center less than the capacitive sensing node at edge, if the feature with " intermediate small surrounding is big ", then think that multiple touch area is singly to refer to touch, if not having the feature of " intermediate small surrounding is big ", then it is assumed that multiple touch area is to refer to touch more.

In some possible implementations, change amount signal of the basis close to the capacitive sensing node at the target area center, further determine that the multiple touch area is singly to refer to touch or refer to more to touch, comprise determining that the M row close to the target area center × N arranges a capacitive sensing node, M and N are preset positive integer；It calculates the M row × N and arranges a flatness for the capacitance change of capacitive sensing node, the flatness is equal toWherein, K is the logarithm that the M row × N arranges adjacent capacitor sense node in a capacitive sensing node, and Δ C is the difference of the change amount signal of two neighboring capacitive sensing node, and K is positive integer, and j is the positive integer no more than K；If the flatness is less than or equal to third threshold value, the multiple touch area is determined singly to refer to touch；If the flatness is greater than third threshold value, determine that the multiple touch area is to refer to touch more.

The embodiment is analyzed by the change amount signal to the capacitive sensing node close to the target area center, judge whether the flatness of the change amount signal of the capacitive sensing node at center meets the requirements, if flatness is less than third threshold value, then think that multiple touch area is singly to refer to touch, otherwise it is assumed that multiple touch area is to refer to touch more.

It should be understood that, in the embodiment of the present application, when the change amount signal of the capacitive sensing node close to the target area edge, when being unsatisfactory for the target distribution rule, can by pass-through mode 1 and in a manner of at least one of 2 modes, come further determine multiple touch area be singly refer to touch or refer to touch.

Particularly, when simultaneously determine whether multiple touch area is singly to refer to touch according to mode 1 and mode 2 when, need to meet simultaneously S1≤S2 andLess than third threshold value.The accuracy of touch detection can be improved in this way, singly refer to touch and mostly finger touch to more accurately identify.

In some possible implementations, it is described when there are multiple touch areas, according to the regularity of distribution of the change amount signal of the capacitive sensing node of the multiple touch area, the multiple touch area is determined singly to refer to touch or refer to more and touch, it include: when there are multiple touch areas, and in the multiple touch area, when the centre distance between at least one touch area in each touch area and other touch areas is less than four threshold values, according to the regularity of distribution of the change amount signal of the capacitive sensing node of the multiple touch area, the multiple touch area is determined singly to refer to touch or refer to more and touch.

Because if there are some touch area and other touch areas all apart from far, then the touch area is more likely respectively that different fingers touches are formed by from other touch areas.Only in the multiple touch areas being closer, just more there is the necessity for judging single-touch and multiple point touching.Therefore, multiple touch areas to centre distance less than the 4th threshold value carry out touch detection using the method for the embodiment of the present application, can significantly improve the efficiency of touch detection.

In some possible implementations, when determining the multiple touch area singly to refer to touch, the method also includes: the minimum rectangular area including the multiple touch area is locked, to form ' locked ' zone；When touch point is by the multiple touch area, slides into other multiple touch areas Chong Die with the ' locked ' zone, other described multiple touch areas are determined singly to refer to touch.

In some possible implementations, the method also includes: if it is determined that the multiple touch area is singly to refer to touch, then report the position of the ' locked ' zone；If it is determined that the multiple touch area is to refer to touch more, then the multiple touch area respective positions are reported.

Second aspect provides a kind of touch detecting method, comprising: according to the change amount signal of multiple capacitive sensing nodes, determines touch area；When there are multiple touch areas, determine whether the multiple touch area is Chong Die with ' locked ' zone, wherein the ' locked ' zone is including the touch area of previous frame Minimum rectangular area, and the touch area of the previous frame be singly refer to touch；If the multiple touch area is Chong Die with the ' locked ' zone, the multiple touch area is determined singly to refer to touch.

The third aspect provides a kind of touch detecting apparatus, the module of the method in any possible implementation including executing first aspect or first aspect.

Fourth aspect provides a kind of touch detecting apparatus, the module of the method in any possible implementation including executing second aspect or second aspect.

5th aspect, provides a kind of touch detecting apparatus, including processor and memory.For storing instruction, processor is for executing the instruction for memory.When the processor executes the instruction of memory storage, the execution is so that the processor executes the method in any possible implementation of first aspect or first aspect.

6th aspect, provides a kind of touch detecting apparatus, including processor and memory.For storing instruction, processor is for executing the instruction for memory.When the processor executes the instruction of memory storage, the execution is so that the processor executes the method in any possible implementation of second aspect or second aspect.

7th aspect, provides a kind of touch chip, which includes the touch detecting apparatus of the above-mentioned third aspect or the 5th aspect.

Eighth aspect provides a kind of touch chip, which includes the touch detecting apparatus of above-mentioned fourth aspect or the 6th aspect.

9th aspect, provides a kind of electronic equipment, which includes the touch detecting apparatus of the above-mentioned third aspect or the 5th aspect, or the touch chip including above-mentioned 7th aspect.

Tenth aspect, provides a kind of electronic equipment, which includes the touch detecting apparatus of above-mentioned fourth aspect or the 6th aspect, or the touch chip including above-mentioned eighth aspect.

On the one hand tenth, provides a kind of computer-readable medium, for storing computer program, which includes the instruction for executing the method in any possible implementation of first aspect or first aspect.

12nd aspect, provides a kind of computer-readable medium, for storing computer program, which includes the instruction for executing the method in any possible implementation of second aspect or second aspect.

Detailed description of the invention

Fig. 1 is the schematic illustration of touch detection.

The schematic diagram of negative difference is generated when Fig. 2 is imperfect earth.

Fig. 3 (a) is to be grounded kilter and place an order to refer to the distribution situation for the change amount signal for touching caused capacitive sensing node.

Fig. 3 (b) be imperfect earth state place an order refer to touch caused by capacitive sensing node change amount signal distribution situation.

Fig. 3 (c) is the distribution situation for more referring to the change amount signal for touching caused capacitive sensing node.

Fig. 4 is situation of change of the change amount signal with capacitive sensing node location.

Fig. 5 is the schematic flow chart of the touch detecting method of the embodiment of the present application.

Fig. 6 (a) is the schematic diagram of touch area when singly referring to touch of the embodiment of the present application.

Fig. 6 (b) is the possible schematic diagram there are when multiple touch areas of one kind of the embodiment of the present application.

Fig. 6 (c) is that there are schematic diagrames when multiple touch areas for the embodiment of the present application alternatively possible.

Fig. 7 is the schematic diagram of the ' locked ' zone of the embodiment of the present application.

Fig. 8 is the schematic flow chart of the touch detecting method of another embodiment of the application.

Fig. 9 is the schematic flow chart of the touch detecting method of another embodiment of the application.

Figure 10 is the schematic block diagram of the touch detecting apparatus of the application one embodiment.

Figure 11 is the schematic block diagram of the touch detecting apparatus of the application another embodiment.

Figure 12 is the schematic block diagram of the touch detecting apparatus of the application another embodiment.

Figure 13 is the schematic block diagram of the touch detecting apparatus of the application further embodiment.

Figure 14 is the schematic block diagram of the touch chip of the embodiment of the present application.

Specific embodiment

Below in conjunction with attached drawing, technical solutions in the embodiments of the present application is described.

Fig. 1 is the schematic illustration of touch detection.Fig. 1 shows touch screen (or claiming touch screen, touch panel) 100, touch sensor 110 and touch controller 120.Touch screen 100 for example can be capacitive touch screen.Touch controller 120 is referred to as touch screen control chip (abbreviation touch chip) or touch detection module etc..Wherein, touch screen 100 includes P driving channel and Q induction channels, and P and Q can be equal or unequal natural number.Touch controller 120 can be connected with P driving channel, Q induction channels respectively.Touch controller 120 passes through driving circuit to P driving channel output drive signal, and passes through the inductive signal that sensor circuit receives or incudes the output of Q induction channels.

Fig. 1 is with P=4, for Q=4, shows driving channel Tx1 to Tx4 and induction channels Rx1 to Rx4.Wherein the position of every Tx and Rx intersection may be considered a capacitive sensing node, touch For controller 120 to P driving channel output drive signal, driving signal returns to touch controller 120 by Q induction channels after touch sensor 110, and the signal value of each capacitive sensing node is obtained after processing.Take signal value when no touch as benchmark, the signal value of capacitive sensing node when subtracting current touch with benchmark, the changing value of the semaphore exported on available each capacitive node.It should be understood that the changing value of the semaphore exported on each capacitive node, subtracts the changing value that current semaphore obtains for original signal amount, is referred to as difference or change amount signal.Original signal amount can be the original signal amount as benchmark, can update with datum renewal.

It should be noted that, multiple driving channels shown in Fig. 1 and formal distribution of multiple induction channels to intersect vertically, but it is only for exemplary illustration, driving channel be distributed in same plane (such as, it is denoted as plane #1), induction channels are distributed in another plane (for example, being denoted as plane #2), two planes (the i.e. plane #1 and plane #2) stacked on top.Wherein, which can allow driving channel and induction channels to be distributed according to orthogonal mode, and there are a mutual capacitance for the point of intersection in each driving channel and induction channels.It should be understood that; driving channel and induction channels are distributed only a kind of possible implementation for touch detection in a manner of orthogonal; any restriction is constituted without coping with the application; as long as between each driving channel and each induction channels, there are the intersection points that one can generate mutual capacitance; and the intersection point of multiple driving channel and multiple induction channels can be distributed evenly in below entire touch screen, should all be fallen into the protection scope of the application.In the embodiment of the present application, for convenience of description, the intersection point of channel and induction channels can will be driven to be denoted as capacitive sensing node, behind also abbreviation capacitive node or sense node.

When the electrically GND imperfect earth of finger and touch screen 100 is in suspended state, there are deviations between the signal value that capacitive sensing node may be made to export and actual value.It should be understood that imperfect earth here be referred to as it is unearthed, without ground connection, without ground connection well, improper ground connection, isolation, suspend (floating) etc., indicate the situation of imperfect earth.

The schematic diagram of negative difference is generated when imperfect earth as shown in Figure 2, when finger 1 touches on capacitive sensing node A, due to finger 1 and 100 imperfect earth of touch screen, the variation of very little only occurs for the semaphore that the signal that should be electrically shunted originally is not split, thus exports on capacitive sensing node A.Equally, for finger 2, when it is touched on capacitive sensing node B, the variation of very little also only occurs for the semaphore exported on capacitive sensing node B.The signal that thus induction channels receive cannot accurately reflect actual touch situation.

When especially finger 1 and finger 2 touch capacitive sensing node A and capacitive sensing node B respectively simultaneously, if the driving channel Tx1 output drive signal of finger 1, finger 1 touches capacitive sensing node A When capacitive sensing node A on a part of signal for exporting touch screen 100 can be back to by finger B, thus also can output signal value on the capacitive sensing node B that finger B is touched.And if the driving channel Tx3 output drive signal of same finger 2, a part of signal exported on capacitive sensing node B when finger 2 touches capacitive sensing node B can be back to touch screen 100 by finger A, thus also can output signal value on the capacitive sensing node A that finger A is touched.And, similar signal value can be also generated close on the capacitive sensing node C and capacitive sensing node D of capacitive sensing node A and capacitive sensing node B, but on actually capacitive sensing node C and capacitive sensing node D and there is no touch, our capacitive sensing node C and capacitive sensing node D are referred to as negative difference point, and this phenomenon is known as negative difference effect or negative pixel effect.

When being grounded good, shown in distribution situation such as Fig. 3 (a) of the change amount signal of capacitive sensing node caused by finger touches, the change amount signal of surrounding capacitive sensing node is less than the change amount signal of intermediate capacitance sense node.But when imperfect earth, due to the presence of negative pixel effect recited above, the regularity of distribution of the change amount signal of capacitive sensing node caused by single finger touches may be as shown in Fig. 3 (b), and the change amount signal of intermediate capacitance sense node is less than the change amount signal of surrounding capacitive sensing node.In this way, the touch (can be described as single-touch or singly refer to touch) of the finger may be identified as the touch (can be described as multiple point touching or refer to more to touch) of multiple fingers by touch controller 120.Such as in Fig. 4 curve a show ground connection it is good when, singly refer to touch under touch area in capacitive sensing node change amount signal distribution situation, will form a wave crest among curve；When curve b is imperfect earth in Fig. 4, singly refer to the distribution situation of the change amount signal of the capacitive sensing node in the touch area under touching, it can be seen that, it will form a trough among curve, according to the distribution situation of change amount signal at this moment, it is easy to singly refer to that touch recognition is to refer to touch more, because it is similar to the distribution situation of change amount signal of capacitive sensing node when more referring to touch shown in Fig. 3 (c).

Therefore, the embodiment of the present application proposes that the regularity of distribution identification based on the change amount signal of capacitor sense node on touch area singly refers to that touch is touched with mostly finger, also can accurately distinguish in imperfect earth and singly refer to touch and mostly finger touch.

Fig. 5 shows the schematic flow chart of the touch detecting method 500 of the embodiment of the present application, this method such as touch controller shown in Fig. 1 or other touch detecting apparatus execute, and can be applied to various touch-controlled electronic devices such as mobile terminal, computer etc..As shown in figure 5, this method 500 may include:

In 510, according to the change amount signal of multiple capacitive sensing nodes, touch area is determined.

Specifically, such as aforementioned description to Fig. 1, when there is touch, by the capacitive sensing in touch area The semaphore of node output can change, and touch controller can determine the touch area, to generate corresponding touch event by the situation of change of detection semaphore in real time.That is, determining touch point/touch area relative to the variable quantity of benchmark by the signal of sense node output when touch in other words by determining touch area with the change amount signal of capacitive sensing node after touch before touching.

It should be understood that touch area is alternatively referred to as frame, the process of touch area i.e. the process of picture frame are determined.

In general, the distribution situation of the changed capacitive sensing node of binding signal variable quantity, the rectangular area that changed most left, most right, highest and lowest the capacitive sensing node of change amount signal can be surrounded is considered an a touch area i.e. frame.The changed capacitive sensing node of the change amount signal for causing capacitive sensing node value point can be referred to as below, and, when the change amount signal of capacitive sensing node is more than certain threshold value, just think that the change amount signal of the capacitive sensing node is changed, the capacitive sensing node has just been value point, is the interference in order to exclude noise in this way.

It is touch area A according to the touch area that the change amount signal of capacitive sensing node determines, touch area A is rectangular area, and touch area A is singly to refer to touch such as shown in Fig. 6 (a).

In another example it is rectangular area that the touch area determined according to the change amount signal of capacitive sensing node, which is touch area B and touch area C, touch area B and touch area C, shown in Fig. 6 (b).

In another example it is rectangular area that the touch area determined according to the change amount signal of capacitive sensing node, which is touch area D and touch area E, touch area D and touch area E, shown in Fig. 6 (c).

When only one touch area, such as touch area A shown in Fig. 6 (a), it is determined that touch area A is singly to refer to touch.It is also likely to be singly to refer to touch when there are touch area D and touch area E shown in touch area B shown in such as Fig. 6 (b) of multiple touch areas and touch area C such as Fig. 6 (c), then both may be that mostly finger touches.As mentioned above, in imperfect earth, the regularity of distribution of the change amount signal of capacitive sensing node when singly referring to touch is similar to the regularity of distribution of change amount signal of capacitive sensing node when more referring to touch, singly refers to that touch is likely to be identified as to refer to more and touches.Therefore, it is necessary to the regularities of distribution of the change amount signal of the capacitive sensing node with specific reference to multiple touch area, to identify that multiple touch area is singly to refer to touch or refer to touch more to be formed by.

It should be understood that multiple touch area is singly to refer to that touch (causing) refers in the embodiment of the present application, multiple touch area is acted on by a finger or an object such as capacitance pen/active pen, is referred to as single-touch；Multiple touch area is to refer to touch to refer to that multiple fingers or multiple objects are respectively acting on multiple touch area more, is referred to as multiple point touching.

In step 520, when there are multiple touch areas, according to the regularity of distribution of the change amount signal of the capacitive sensing node of multiple touch area, determine multiple touch area and touch or refer to more singly to refer to It touches.

Specifically, if there is multiple touch areas, so touch controller can be according to the regularity of distribution of the change amount signal of the capacitive sensing node of multiple touch area, to determine multiple touch area singly to refer to touch (caused) or refer to touch (caused) more.Although the regularity of distribution of the change amount signal of capacitive sensing node is similar to the regularity of distribution of change amount signal of capacitive sensing node when more referring to touch when singly referring to touch, but singly refers to the regularity of distribution of change amount signal of capacitive sensing node when touching and referring to touch more there is also difference, each have their own features.Although such as all there are two touch areas in Fig. 6 (b) and Fig. 6 (c), but the distribution and size of the capacitance change of the capacitive sensing node in the two of Fig. 6 (b) touch areas, with the distribution and size of the capacitance change of the capacitive sensing node in two touch areas of Fig. 6 (c), all there is notable difference.By analyzing these differences, it can accurately identify that multiple touch area is singly to refer to touch or refer to more to touch.

In this way, singly referring to that touch is touched with mostly finger in the embodiment of the present application by the regularity of distribution identification of the change amount signal of capacitor sense node on touch area, also capable of accurately being distinguished in imperfect earth and singly refer to touch and mostly finger touch.

Optionally, in step 520, when there are multiple touch areas, according to the regularity of distribution of the change amount signal of the capacitive sensing node of multiple touch area, multiple touch area is determined singly to refer to touch or refer to more and touch, it include: when there are multiple touch areas, and in multiple touch area, when the centre distance between at least one touch area in each touch area and other touch areas is less than four threshold values, according to the regularity of distribution of the change amount signal of the capacitive sensing node of multiple touch area, multiple touch area is determined singly to refer to touch or refer to more and touch.

In other words, in identified multiple touch area, the centre distance between at least one touch area in each touch area and other touch areas is less than the 4th threshold value.Because if there are some touch area and other touch areas all apart from far, then the touch area is more likely respectively that different fingers touches are formed by from other touch areas.Only in the multiple touch areas being closer, just more there is the necessity for judging single-touch and multiple point touching.Therefore, multiple touch areas to centre distance less than the 4th threshold value carry out touch detection using the method for the embodiment of the present application, can significantly improve the efficiency of touch detection.For example, if two touch areas in Fig. 6 (b) or Fig. 6 (c) be not distance as shown in the figure it is close but apart from far, caused by the two touch areas almost can be determined that different fingers touches.

Optionally, step 520 can also include step 521 and step 522.

In step 521, the capacitor at the edge close to the target area of multiple touch area composition is determined Whether sense node meets target distribution rule.

In step 522, if the capacitive sensing node close to the target area edge meets target distribution rule, determine that multiple touch area is to refer to touch more.

That is, determining whether the capacitive sensing node close to the edge of the target area of multiple touch area composition meets the target distribution rule when there are multiple touch areas.The target distribution rule for example can under normal circumstances refer to touch when close to entire touch area edge capacitive sensing node the regularity of distribution.If meeting target distribution rule, multiple touch area is to refer to touch more；If being unsatisfactory for target distribution rule, it may be considered that multiple touch area is singly to refer to that a phenomenon is torn in touch open.

Further, if the capacitive sensing node close to the target area edge is unsatisfactory for target distribution rule, although it is single-touch that there is a strong possibility at this time, but in order to more accurately judge whether multiple touch area is single-touch, it can also be further according to the numerical characteristics of the change amount signal of the capacitive sensing node of touch area when singly referring to touch, to judge whether multiple touch area is singly to refer to touch.

Optionally, after step 521, this method can also include step 523.

In step 523, if the capacitive sensing node close to the target area edge is unsatisfactory for target distribution rule, then according to the change amount signal of the capacitive sensing node close to the target area center, further determine that multiple touch area is singly to refer to touch or refer to more to touch.

Specifically, when there are multiple touch areas, it is first determined the capacitive sensing node close to the edge of the target area of multiple touch area composition, if meet target distribution rule.The target distribution rule for example can under normal circumstances refer to touch when close to entire touch area edge capacitive sensing node the regularity of distribution.If the capacitive sensing node close to the target area edge meets target distribution rule, illustrate that multiple touch area is to refer to touch more, i.e. execution step 522；If the capacitive sensing node close to the target area edge is unsatisfactory for target distribution rule, it then also needs further according to the change amount signal of the capacitive sensing node close to the target area center, judge whether multiple touch area is singly to refer to touch, i.e. execution step 523.

Optionally, target distribution rule are as follows: in the region of interest, the column where first edge node in i-th row capacitive sensing node, it is greater than first threshold with the distance between the column where the first edge node in i+1 row capacitive sensing node, and the column where the second edge node in the i-th row capacitive sensing node, it is greater than the first threshold with the distance between the column where the second edge node in the i+1 row capacitive sensing node, wherein, the first edge node is the capacitive sensing node that left end plays that first change amount signal is greater than second threshold, the second edge node is that first change amount signal of right end is greater than The capacitive sensing node of the second threshold, the value of i are 1 to P, and P is total line number of capacitive sensing node in target area.

It should be understood that the distance between two column can be equal to the difference of the columns of two column, such as the distance between the 3rd column and the 1st column are 3-1=2.

In the embodiment, if the column where first edge node in the i-th row capacitive sensing node, it is greater than first threshold with the distance between the column where the first edge node in i+1 row capacitive sensing node, and the column where the second edge node in the i-th row capacitive sensing node, it is greater than the first threshold with the distance between the column where the second edge node in the i+1 row capacitive sensing node, then determines that multiple touch area is to refer to touch more.If the column where first edge node in the i-th row capacitive sensing node, it is less than or equal to first threshold with the distance between the column where the first edge node in i+1 row capacitive sensing node, and the column where the second edge node in the i-th row capacitive sensing node, it is less than or equal to the first threshold with the distance between the column where the second edge node in the i+1 row capacitive sensing node, then determines multiple touch area singly to refer to touch.

By taking Fig. 6 (b) and Fig. 6 (c) as an example, two touch areas are all illustrated in Fig. 6 (b) and Fig. 6 (c).It should be understood that touch be formed by touch area can also be more, be only illustrated for scheming two touch areas in (b) and Fig. 6 (c) here.

Fig. 6 (b) is illustrated first, assuming that second threshold is 1 unit (pitch), as shown in Fig. 6 (b), in the target area of two touch areas, that is, touch area B and touch area C composition, first edge node in 1st row capacitive sensing node is located at the 4th column of target area, and the change amount signal of the capacitive sensing node is 13；First edge node in 2nd row capacitive sensing node is located at the 3rd column (being 1 with the distance between the 4th column where the first edge node of the 1st row), and the change amount signal of the first edge node is 69；First edge node in 3rd row capacitive sensing node is located at the 3rd column (being 0 with the distance between the 3rd column where the first edge node of the 2nd row), and the change amount signal of the first edge node is 62；First edge node in 4th row capacitive sensing node is located at the 2nd column (being 1 with the distance between the 3rd column where the first edge node of the 3rd row), and the change amount signal of the first edge node is 56；First edge node in 5th row capacitive sensing node is located at the 1st column (being 1 with the distance between the 2nd column where the first edge node of the 4th row), and the change amount signal of the capacitive sensing node is 42；First edge node in 6th row capacitive sensing node is located at the 1st column (being 0 with the distance between the 1st column where the first edge node of the 5th row), and the change amount signal of the first edge node is 58；First edge node in 7th row capacitive sensing node is located at the 1st column (being 0 with the distance between the 1st column where the first edge node of the 6th row), and the change amount signal of the first edge node is 14.

As can be seen that the distance between column where the first edge node of adjacent rows capacitive sensing node are no more than 1, i.e., adjacent (distance is 1 between column) or identical (distance is 0 between column).

Fig. 6 (b) is still investigated, in the target area of two touch areas B and C composition, the second edge node in the 1st row capacitive sensing node is located at the 5th column of target area, and the change amount signal of the second edge node is 12；Second edge node in 2nd row capacitive sensing node is located at the 5th column (being 0 with the distance between the 5th column where the second edge node of the 1st row), and the change amount signal of the second edge node is 22；Second edge node in 3rd row capacitive sensing node is located at the 6th column (being 1 with the distance between the 5th column where the second edge node of the 2nd row), and the change amount signal of the second edge node is 21；Second edge node in 4th row capacitive sensing node is located at the 6th column (being 0 with the distance between the 6th column where the second edge node of the 3rd row), and the change amount signal of the second edge node is 44；Second edge node in 5th row capacitive sensing node is located at the 5th column (being 1 with the distance between the 6th column where the second edge node of the 4th row), and the change amount signal of the second edge node is 71；Second edge node in 6th row capacitive sensing node is located at the 4th column (being 1 with the distance between the 5th column where the second edge node of the 5th row), and the change amount signal of the second edge node is 48；Second edge node in 7th row capacitive sensing node is located at the 3rd column (being 1 with the distance between the 4th column where the second edge node of the 6th row), and the change amount signal of the second edge node is 83.

It can be seen that the distance between column where the second edge node in adjacent rows capacitive sensing node and be also all not more than 1.

Therefore, in Fig. 6 (b), since the capacitive sensing node close to the edge by the target area formed touch area B and touch area C is unsatisfactory for target distribution rule, the column being unsatisfactory for where the first edge node in the i-th row capacitive sensing node, it is greater than first threshold with the distance between the column where the first edge node in i+1 row capacitive sensing node, and the column where the i-th second edge node in row capacitive sensing node, it is greater than first threshold with the distance between the column where the second edge node in i+1 row capacitive sensing node, to need to be implemented 523, i.e. according to the numerical characteristics of the change amount signal of the capacitive sensing node close to the target area center, further determine that multiple touch area is singly to refer to touch or refer to more to touch.

Next Fig. 6 (c) is illustrated, it will again be assumed that second threshold is 1 unit (pitch), as shown in Fig. 6 (c), in the target area of two touch areas, that is, touch area D and touch area E composition, first edge node in 1st row capacitive sensing node is located at the 3rd column of target area, and the change amount signal of the first edge node is 47；First edge node in 2nd row capacitive sensing node is located at the 3rd column (being 0 with the distance between the 3rd column where the first edge node of the 1st row), the first edge The change amount signal of node is 91；First edge node in 3rd row capacitive sensing node is located at the 3rd column (being 0 with the distance between the 3rd column where the first edge node of the 2nd row), and the change amount signal of the first edge node is 87；First edge node in 4th row capacitive sensing node is located at the 1st column (being 2 with the distance between the 3rd column where the first edge node of the 3rd row), and the change amount signal of the first edge node is 56；First edge node in 5th row capacitive sensing node is located at the 1st column (being 0 with the distance between the 1st column where the first edge node of the 4th row), and the change amount signal of the first edge node is 81；First edge node in 6th row capacitive sensing node is located at the 1st column (being 0 with the distance between the 1st column where the first edge node of the 5th row), and the change amount signal of the capacitive sensing node is 28.

It can be seen that, the 3rd column where first edge node in 4th row capacitive sensing node, it is 2 with the distance between the 1st column where the first edge node in the 3rd row capacitive sensing node, which is greater than 1, is equivalent to and has occurred jumping (non-conterminous also not identical between column).

Equally, where the second edge node in the 4th row capacitive sensing node the 3rd column, with where the second edge node in the 3rd row capacitive sensing node the 1st column the distance between also greater than 1.

Therefore, in Fig. 6 (c), since the capacitive sensing node close to the edge by the target area formed touch area D and E is unsatisfactory for target distribution rule, it is unsatisfactory for: the column where first edge node in the i-th row capacitive sensing node, it is greater than first threshold with the distance between the column where the first edge node in i+1 row capacitive sensing node, and the column where the i-th second edge node in row capacitive sensing node, it is greater than first threshold with the distance between the column where the second edge node in i+1 row capacitive sensing node, to need to be implemented 522, determine that multiple touch area is to refer to touch more.

It is touched for singly referring to touch and refer to more, it is generally the case that the row or column where more referring to the capacitive sensing node for having semaphore to change on the edge of touch area when touching will appear jump, such as situation shown in Fig. 6 (c).And when singly referring to touch, the value point at edge can suffer compact, it generally will form the shape of approximate ellipse, for example first edge node (change amount signal is respectively 13,69,62,56,42,58,14) in 6 (b) in every a line capacitive sensing node and second edge node (change amount signal is respectively 83,48,71,44,21,22,12) link up one ellipse of approximation.

It should be understood that here can also be by judge the change in location curve of first edge node and second edge node in multirow capacitive sensing node, to determine that multiple touch area is singly to refer to touch or mostly finger touch.The change in location curve can be the curve that a columns changes with line number.By taking the regularity of distribution of the first edge node in multirow capacitive sensing node as an example, the first edge node of wherein each row is that the capacitive sensing node that first change amount signal is greater than second threshold is played in left end in the row.It is successively increased with line number When, if there is obvious jump between columns where first edge node in adjacent rows, i.e. curve mutates, then determines that multiple touch area is to refer to touch more；If changing gently between the columns where first edge node in adjacent rows, do not jump, the trend that recurrence increaseds or decreases is presented in curve, then determines multiple touch area singly to refer to touch.

It should also be understood that the target area not necessarily regular figure being made of multiple touch area, the capacitive sensing node of target area, which is also not necessarily, to be distributed according to m row × n column rule.Such as the target area being made of touch area B and C, and be the irregular area of step by the target area that touch area D and E are formed.

It will also be understood that, the target distribution rule may be: in the region of interest, the column where first edge node in i-th row capacitive sensing node, it is less than first threshold with the distance between the column where the first edge node in i+1 row capacitive sensing node, and the distance between column where the second edge node in the column where the second edge node in the i-th row capacitive sensing node, with the i+1 row capacitive sensing node are less than first threshold.Wherein, which is the capacitive sensing node that left end plays that first change amount signal is greater than second threshold, which is the capacitive sensing node that right end plays that first change amount signal is greater than the second threshold.At this moment, if first edge node and/or second edge node in the multirow capacitive sensing node of target area are unsatisfactory for target distribution rule, determine that multiple touch area is to refer to touch more；If the first edge node and/or second edge node in multirow capacitive sensing node meet target distribution rule, then according to the change amount signal of the capacitive sensing node close to the target area center, further determine that multiple touch area is singly to refer to touch or refer to more to touch.

It should also be understood that described above is all to be judged by way of by row scanning for the capacitive sensing node of every row, so that it is determined that whether edge capacitance sense node meets target distribution rule.But in the embodiment of the present application, it can also successively be judged for the capacitive sensing node of each column by way of by column scan, so that it is determined that whether edge capacitance sense node meets target distribution rule.At this moment, the target distribution rule for example can be with are as follows: in the target area, the row where first edge node in kth column capacitance sense node, it is greater than first threshold with the distance between the row where the first edge node in+1 column capacitance sense node of kth, and the row where the second edge node in the kth column capacitance sense node, it is greater than first threshold with the distance between the row where the second edge node in+1 column capacitance sense node of kth, wherein the value of k is 1 to Q, total columns of capacitive sensing node in the target area Q.The first edge node is the capacitive sensing node for playing first change amount signal from bottom to top and being greater than second threshold.The second edge node is the capacitive sensing node for playing first change amount signal from top to bottom and being greater than second threshold.At this moment, if first edge node and/or second edge in the multiple row capacitive sensing node of target area Node meets target distribution rule, then determines that multiple touch area is to refer to touch more；Otherwise according to the change amount signal of the capacitive sensing node close to the target area center, further determine that multiple touch area is singly to refer to touch or refer to more to touch.

Optionally, in the embodiment of the present application, the quantity of edge sense node for meeting or being unsatisfactory for target distribution rule can also be defined.For example, if the quantity for meeting the fringe node of target distribution rule is more than a preset value, determining that multiple touch area is to refer to touch more in the capacitive sensing node close to the target area edge；Alternatively, the number for being unsatisfactory for the fringe node of target distribution rule is more than another preset value, then according to the change amount signal of the capacitive sensing node close to the target area center, further determine that multiple touch area is singly to refer to touch or refer to more to touch.

In step 523, for how to be singly to refer to touch or refer to more to touch according to the multiple touch area of change amount signal judgement of the capacitive sensing node close to the target area center, the application provides two ways.

Mode 1

Optionally, according to the change amount signal of the capacitive sensing node close to the target area center, determine that multiple touch area is singly to refer to touch or refer to more to touch, comprising:

Determine that the M row close to the target area center × N arranges a capacitive sensing node, M and N are preset positive integer；Calculate the average value of the change amount signal of other capacitive sensing nodes in the average value and the target area of the M row × N column capacitive sensing node change amount signal in addition to the M row × N arranges a capacitive sensing node；If the M row × N, which arranges the average value of the change amount signal of capacitive sensing node, determines multiple touch area then less than or equal to the average value of the change amount signal of other capacitive sensing nodes singly to refer to touch；If the M row × N arranges the average value of the change amount signal of capacitive sensing node, greater than the average value of the change amount signal of other capacitive sensing nodes, then determine that multiple touch area is to refer to touch more.

Mode 1 is analyzed by the change amount signal of the capacitive sensing node to target area, judges whether the feature for meeting " intermediate small surrounding is big ", i.e. change amount signal of the change amount signal of the capacitive sensing node at center less than the capacitive sensing node at edge.If the feature with " intermediate small surrounding is big ", then it is assumed that multiple touch area is singly to refer to touch；If not having the feature of " intermediate small surrounding is big ", then it is assumed that multiple touch area is to refer to touch more.

Wherein, optionally, it is the center for covering the minimum rectangular area of the target area that M row × N close to the target area center, which arranges a center for capacitive sensing node,.

M and N is preset, such as M=2, N=2, and expression will be close to the 2 of target area center × 2 capacitive sensing nodes are considered the capacitive sensing node close to the target area center.

The M row × N change amount signal summation for arranging a capacitive sensing node is averaged to obtain average value S1, and be compared with an average value S2 for the change amount signal for being located at M row × N column capacitive sensing node surrounding capacitive sensing node in target area, multiple touch area is determined if S1≤S2 singly to refer to touch；Determine that multiple touch area is to refer to touch more if S1 > S2.

Mode 2

Determine that the M row close to the target area center × N arranges a capacitive sensing node, M and N are preset positive integer；It calculates the M row × N and arranges a flatness for the capacitance change of capacitive sensing node；If the flatness is less than or equal to third threshold value, multiple touch area is determined singly to refer to touch；If the flatness is greater than third threshold value, determine that multiple touch area is to refer to touch more.

Mode 2 is analyzed by the change amount signal to the capacitive sensing node close to the target area center, judge whether the flatness of the change amount signal of the capacitive sensing node at center meets the requirements, if flatness is less than third threshold value, then think that multiple touch area is singly to refer to touch, otherwise it is assumed that multiple touch area is to refer to touch more.

Wherein, which is equal toWherein, K is the logarithm (i.e. it includes K to adjacent node that the M row × N, which is arranged in a capacitive sensing node) that the M row × N arranges adjacent capacitor sense node in a capacitive sensing node, Δ C is the difference between the change amount signal of two neighboring capacitive sensing node, K is positive integer, and j is the positive integer no more than K.

Optionally, in step 520, if it is determined that multiple touch area is singly to refer to touch, then this method can also include: to lock to the minimum rectangular area including multiple touch area, to form ' locked ' zone；When touch point slides into other multiple touch areas Chong Die with the ' locked ' zone by multiple touch area, determine that other multiple touch areas are singly to refer to touch.

It should be understood that overlapping here can be and partly overlap, it is also possible to whole overlappings.

Specifically, when determining multiple touch area singly to refer to touch, the minimum rectangular area that multiple touch area (or perhaps target area) is included is locked, the region after locking is ' locked ' zone.' locked ' zone may be considered the rectangle frame that left margin, right margin, coboundary and the lower boundary of this multiple touch area form.Such as shown in Fig. 7, ' locked ' zone L can be formed after two touch areas formed when touch are locked by singly referring to.It can all be judged based on the ' locked ' zone L that this is stored away when data processing after later each frame sampling, if other touch areas that next frame searches out all have intersection i.e. least partially overlapped with this ' locked ' zone L, being considered as other touch areas is singly to refer to touch, and ' locked ' zone L is updated to the minimum rectangular area including other touch areas.It is appreciated that the boundary of ' locked ' zone L with real-time update, can follow the movement of finger and move, being equivalent to finger can drag that the ' locked ' zone moves on the touchscreen and the ' locked ' zone can be updated in moving process with real-time perfoming.

Optionally, this method further include: if it is determined that multiple touch area is singly to refer to touch, then report the position of ' locked ' zone L；If it is determined that multiple touch area is to refer to touch more, then multiple touch area respective positions are reported.

Fig. 8 shows the schematic flow chart of the touch detecting method 800 of another embodiment of the application, this method such as touch controller shown in Fig. 1 or other touch detecting apparatus execute, and can be applied to various touch-controlled electronic devices such as mobile terminal, computer etc..As shown in figure 8, this method 800 may include:

In step 810, according to the change amount signal of multiple capacitive sensing nodes, touch area is determined.

In step 820, when there are multiple touch areas, determine whether multiple touch area is Chong Die with ' locked ' zone.

Wherein, which is the minimum rectangular area region including the touch area of previous frame, and the touch area of the previous frame is singly to refer to touch.

In step 830, if multiple touch area is Chong Die with the ' locked ' zone, multiple touch area is determined singly to refer to touch.

Therefore, in the embodiment, determine whether multiple touch areas of present frame are singly to refer to touch, greatly improve the efficiency of touch detection based on the touch detection result of previous frame.

Fig. 9 is a kind of schematic flow chart of touch detecting method of the embodiment of the present application, below with reference to Fig. 9, is briefly described while determining multiple touch area according to mode 1 and mode 2 singly to refer to and touching or refer to more the process touched, as shown in figure 9, this method comprises:

Step 901, the change amount signal according to multiple capacitive sensing nodes of touch screen, determine Petting Area Domain.

Wherein, when there is only a touch area, it is determined as singly referring to touch；When there are multiple touch areas, step 902 is executed.

The capacitive sensing node at the edge for the target area that step 902, determining close multiple touch area form, if meet target distribution rule.

Wherein, if the capacitive sensing node close to the target area edge meets target distribution rule, 903 are thened follow the steps；If being unsatisfactory for target distribution rule, 904 are thened follow the steps.The target distribution rule is the regularity of distribution of edge capacitance sense node when more referring to touch under normal circumstances.

Step 903 determines that multiple touch area is to refer to touch more.

Step 904 calculates the average value S1 that the M row close to the target area center × N arranges the change amount signal of a capacitive sensing node, and the average value S2 of the change amount signal of other capacitive sensing nodes around.

Wherein, if S1 > S2, thens follow the steps 905；If S1≤S2 thens follow the steps 906；

Step 905 determines that multiple touch area is to refer to touch more.

Step 906 calculates the flatness that the M row × N arranges the change amount signal of a target area capacitive sensing node

Wherein, ifGreater than third threshold value, 907 are thened follow the steps；If the flatness is less than or equal to third threshold value, 908 are thened follow the steps.

Step 907 determines that multiple touch area is to refer to touch more.

Step 908 determines multiple touch area singly to refer to touch.

Step 909 locks the minimum rectangular area including multiple touch area, forms ' locked ' zone.

Step 910 is updated ' locked ' zone or discharges.

Wherein, when touch point slides into other multiple touch areas by the target area, judge whether other multiple touch areas are Chong Die with the ' locked ' zone.If other multiple touch areas are Chong Die with the ' locked ' zone, it is determined that other multiple touch areas are singly to refer to touch, and ' locked ' zone is updated to the minimum rectangular area including other multiple touch areas, otherwise discharge the ' locked ' zone.

It should be understood that, in the various embodiments of the application, magnitude of the sequence numbers of the above procedures are not meant that the order of the execution order, and the execution sequence of each process should be determined by its function and internal logic, and the implementation process without coping with the embodiment of the present application constitutes any restriction.

The above-detailed touch detecting method of the embodiment of the present application, is described below the touch detecting apparatus of the embodiment of the present application.

It should be understood that the device in the embodiment of the present application can execute the method in the embodiment of the present application, have the function of executing correlation method.

Figure 10 shows the schematic block diagram of the touch detecting apparatus 1000 of the embodiment of the present application.The device 1000 can be for example touch controller 120 shown in Fig. 1.As shown in Figure 10, which may include processing module 1010.Wherein, which is used for:

According to the change amount signal of multiple capacitive sensing nodes, touch area is determined；

When there are multiple touch areas, according to the regularity of distribution of the change amount signal of the capacitive sensing node of the multiple touch area, the multiple touch area is determined singly to refer to touch or refer to more and touch.

Optionally, the processing module 1010 is specifically used for: determining whether the capacitive sensing node close to the edge of the target area of the multiple touch area composition meets target distribution rule；If the capacitive sensing node close to the target area edge meets the target distribution rule, determine that the multiple touch area is to refer to touch more.

Optionally, the processing module 1010 is also used to: if the capacitive sensing node close to the target area edge is unsatisfactory for the target distribution rule, then according to the change amount signal of the capacitive sensing node close to the target area center, further determine that the multiple touch area is singly to refer to touch or refer to more to touch.

Optionally, the target distribution rule are as follows: in the target area, the column where first edge node in i-th row capacitive sensing node, it is greater than first threshold with the distance between the column where the first edge node in i+1 row capacitive sensing node, and the column where the second edge node in the i-th row capacitive sensing node, it is greater than the first threshold with the distance between the column where the second edge node in the i+1 row capacitive sensing node, wherein, the first edge node is the capacitive sensing node that left end plays that first change amount signal is greater than second threshold, the second edge node is the capacitive sensing node that right end plays that first change amount signal is greater than the second threshold, the value of i is 1 to P, P is total line number of capacitive sensing node in target area.

Optionally, the processing module 1010 is specifically used for: determining that the M row close to the target area center × N arranges a capacitive sensing node, M and N are preset positive integer；The M row × N is calculated to arrange in the average value of the change amount signal of capacitive sensing node and the target area except the M Row × N arranges the average value of the change amount signal of other capacitive sensing nodes outside a capacitive sensing node；If the M row × N, which arranges the average value of the change amount signal of capacitive sensing node, determines the multiple touch area then less than the average value of the change amount signal of other capacitive sensing nodes singly to refer to touch；If the M row × N arranges the average value of the change amount signal of capacitive sensing node, more than or equal to the average value of the change amount signal of other capacitive sensing nodes, then determine that the multiple touch area is to refer to touch more.

Optionally, the processing module 1010 is specifically used for: determining that the M row close to the target area center × N arranges a capacitive sensing node, M and N are preset positive integer；It calculates the M row × N and arranges a flatness for the capacitance change of capacitive sensing node, the flatness is equal toWherein, K is the logarithm that the M row × N arranges adjacent capacitor sense node in a capacitive sensing node, and Δ C is the difference of the change amount signal of two neighboring capacitive sensing node, and K is positive integer, and j is the positive integer no more than K；If the flatness is less than or equal to third threshold value, the multiple touch area is determined singly to refer to touch；If the flatness is greater than third threshold value, determine that the multiple touch area is to refer to touch more.

Optionally, the processing module 1010 is specifically used for: when there are multiple touch areas, and in the multiple touch area, when the centre distance between at least one touch area in each touch area and other touch areas is less than four threshold values, according to the regularity of distribution of the change amount signal of the capacitive sensing node of the multiple touch area, the multiple touch area is determined singly to refer to touch or refer to more and touch.

Optionally, the processing module 1010 is also used to: when determining the multiple touch area singly to refer to touch point, being locked to the minimum rectangular area including the multiple touch area, to form ' locked ' zone；When touch point is by the multiple touch area, slides into other multiple touch areas Chong Die with the ' locked ' zone, determine that other described multiple touch areas are singly to refer to touch.

Optionally, the processing module 1010 is also used to: if it is determined that the multiple touch area is singly to refer to touch, then reporting the position of the ' locked ' zone；If it is determined that the multiple touch area is to refer to touch more, then the multiple touch area respective positions are reported.

Figure 11 is the schematic block diagram according to the touch detecting apparatus 1100 of the embodiment of the present application.The device 1100 can be for example touch controller 120 shown in Fig. 1.As shown in figure 11, which includes processing module 1110.Wherein, which is used for:

When there are multiple touch areas, determine whether the multiple touch area is Chong Die with ' locked ' zone, wherein the ' locked ' zone is the minimum rectangular area including the touch area of previous frame, and the touch area of the previous frame is singly to refer to touch.

If the multiple touch area is Chong Die with the target area, the multiple touch area is determined singly to refer to touch.

Figure 12 shows the schematic block diagram of the touch detecting apparatus 1200 of the application another embodiment.The device 1200 can be for example touch controller 120 shown in Fig. 1.As shown in figure 12, which includes processor 1210 and memory 1220.Wherein, for storing instruction, which is used to execute the instruction of the memory 1220 storage to the memory 1220, and the execution to the instruction is so that the processor 1210 executes following operation:

According to the change amount signal of the multiple capacitive sensing node, touch area is determined；

Optionally, the processor 1210 is specifically used for: determining whether the capacitive sensing node close to the edge of the target area of the multiple touch area composition meets target distribution rule；If the capacitive sensing node close to the target area edge meets the target distribution rule, determine that the multiple touch area is to refer to touch more.

Optionally, the processor 1210 is also used to: if the capacitive sensing node close to the target area edge is unsatisfactory for the target distribution rule, then according to the change amount signal of the capacitive sensing node close to the target area center, further determine that the multiple touch area is singly to refer to touch or refer to more to touch.

Optionally, the processor 1210 is specifically used for: determining the M close to the target area center Row × N arranges a capacitive sensing node, and M and N are preset positive integer；Calculate the average value of the change amount signal of other capacitive sensing nodes in the average value and the target area of the M row × N column capacitive sensing node change amount signal in addition to the M row × N arranges a capacitive sensing node；If the M row × N, which arranges the average value of the change amount signal of capacitive sensing node, determines the multiple touch area then less than the average value of the change amount signal of other capacitive sensing nodes singly to refer to touch；If the M row × N arranges the average value of the change amount signal of capacitive sensing node, more than or equal to the average value of the change amount signal of other capacitive sensing nodes, then determine that the multiple touch area is to refer to touch more.

Optionally, the processor 1210 is specifically used for: determining that the M row close to the target area center × N arranges a capacitive sensing node, M and N are preset positive integer；It calculates the M row × N and arranges a flatness for the capacitance change of capacitive sensing node, the flatness is equal toWherein, K is the logarithm that the M row × N arranges adjacent capacitor sense node in a capacitive sensing node, and Δ C is the difference of the change amount signal of two neighboring capacitive sensing node, and K is positive integer, and j is the positive integer no more than K；If the flatness is less than or equal to third threshold value, the multiple touch area is determined singly to refer to touch；If the flatness is greater than third threshold value, determine that the multiple touch area is to refer to touch more.

Optionally, the processor 1210 is specifically used for: when there are multiple touch areas, and in the multiple touch area, when the centre distance between at least one touch area in each touch area and other touch areas is less than four threshold values, according to the regularity of distribution of the change amount signal of the capacitive sensing node of the multiple touch area, the multiple touch area is determined singly to refer to touch or refer to more and touch.

Optionally, the processor 1210 is also used to: when determining the multiple touch area singly to refer to touch point, being locked to the minimum rectangular area including the multiple touch area, to form ' locked ' zone；When touch point is by the multiple touch area, slides into other multiple touch areas Chong Die with the ' locked ' zone, determine that other described multiple touch areas are singly to refer to touch.

Optionally, the processor 1210 is also used to: if it is determined that the multiple touch area is singly to refer to touch, then reporting the position of the ' locked ' zone；If it is determined that the multiple touch area is to refer to touch more, then the multiple touch area respective positions are reported.

It can correspond in the above method 500 according to the touch detecting apparatus 1200 of the embodiment of the present application for executing the device of method 500, and the touch detecting apparatus 1000 according to the embodiment of the present application, and each unit in the touch detecting apparatus 1000 or module are respectively used to execute each movement or treatment process performed by the device in the above method 500, here, in order to avoid repeating, description is omitted.

Figure 13 shows the schematic block diagram of the touch detecting apparatus 1300 of the application another embodiment. As shown in figure 13, which includes processor 1310 and memory 1320.Wherein, for storing instruction, which is used to execute the instruction of the memory 1320 storage to the memory 1320, and the execution to the instruction is so that the processor 1310 executes following operation:

Therefore, whether multiple touch areas that present frame is determined based on the touch detection result of previous frame are singly to refer to touch, greatly improve the efficiency of touch detection.

It should be understood that, in the embodiment of the present application, processor can be central monitoring units (Central Processing Unit, CPU), which can also be other general processors, digital signal processor (DSP), specific integrated circuit (ASIC), ready-made programmable gate array (FPGA) either other programmable logic device, discrete gate or transistor logic, discrete hardware components etc..General processor can be microprocessor or the processor is also possible to any conventional processor etc..

The memory may include read-only memory and random access memory, and provide instruction and data to processor.The a part of of memory can also include nonvolatile RAM.For example, memory can be with the information of storage device type.

During realization, each step of the above method can be completed by the integrated logic circuit of the hardware in processor or the instruction of software form.The step of localization method in conjunction with disclosed in the embodiment of the present application, can be embodied directly in hardware processor and execute completion, or in processor hardware and software module combination execute completion.Software module can be located at random access memory, flash memory, read-only memory, in the storage medium of this fields such as programmable read only memory or electrically erasable programmable memory, register maturation.The step of storage medium is located at memory, and processor reads the information in memory, completes the above method in conjunction with its hardware.To avoid repeating, it is not detailed herein.

Figure 14 is a schematic diagram of the touch control chip of the embodiment of the present application.The touch chip chip 1400 of Figure 14 includes input interface 1401, output interface 1402, at least one processor 1403, memory 1404, is interconnected between the input interface 1401, output interface 1402, the processor 1403 and memory 1404 by internal connecting path.The processor 1403 is used to execute the code in the memory 1404.Wherein, processor 1403 includes that various forms can implement signal, data Circuit, module, the chip of the functions such as transmitting, processing or output.

Optionally, when the code is performed, method 500 performed by the device in embodiment of the method is may be implemented in the processor 1403.For sake of simplicity, which is not described herein again.

Optionally, when the code is performed, method 700 performed by the device in embodiment of the method is may be implemented in the processor 1403.For sake of simplicity, which is not described herein again.

The embodiment of the present application also provides a kind of electronic equipment, which may include any one touch detecting apparatus or touch control chip in multiple capacitive sensing nodes and above-mentioned the embodiment of the present application.

Those of ordinary skill in the art may be aware that unit described in conjunction with the examples disclosed in the embodiments of the present disclosure and algorithm steps, can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Professional technician can use different methods to achieve the described function each specific application, but this realization is it is not considered that exceed scope of the present application.

It is apparent to those skilled in the art that for convenience and simplicity of description, system, the specific work process of device and unit of foregoing description can refer to corresponding processes in the foregoing method embodiment, details are not described herein.

In several embodiments provided herein, it should be understood that disclosed systems, devices and methods may be implemented in other ways.Such as, the apparatus embodiments described above are merely exemplary, such as, the division of the unit, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed mutual coupling, direct-coupling or communication connection can be through some interfaces, the indirect coupling or communication connection of device or unit, can be electrical property, mechanical or other forms.

Unit may or may not be physically separated as illustrated by the separation member for this, and component shown as a unit may or may not be physical unit, it can and it is in one place, or may be distributed over multiple network units.It can some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to the actual needs.

In addition, can integrate in a detection unit in each functional unit in each embodiment of the application, it is also possible to each unit and physically exists alone, can also be integrated in one unit with two or more units.

If the function is realized in the form of SFU software functional unit and sells or use as independent product When, it can store in a computer readable storage medium.Based on this understanding, substantially the part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products the technical solution of the application in other words, the computer software product is stored in a storage medium, it uses including some instructions so that a computer equipment (can be personal computer, server or the network equipment etc.) execute each embodiment the method for the application all or part of the steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), the various media that can store program code such as random access memory (Random Access Memory, RAM), magnetic or disk.

More than; the only specific embodiment of the application; but the protection scope of the embodiment of the present application is not limited thereto; anyone skilled in the art is in the technical scope that the embodiment of the present application discloses; it can easily think of the change or the replacement, should all cover within the protection scope that the application is suitble to private interests.Therefore, the protection scope of the embodiment of the present application should be subject to the protection scope in claims.

Claims

A kind of touch detecting method, which is characterized in that the described method includes:

According to the change amount signal of multiple capacitive sensing nodes, touch area is determined；

When there are multiple touch areas, according to the regularity of distribution of the change amount signal of the capacitive sensing node of the multiple touch area, the multiple touch area is determined singly to refer to touch or refer to more and touch.
The method according to claim 1, wherein the regularity of distribution of the change amount signal of the capacitive sensing node according to the multiple touch area, determines the multiple touch area singly to refer to touch or refer to more and touch, comprising:

Determine whether the capacitive sensing node close to the edge of the target area of the multiple touch area composition meets target distribution rule；

If the capacitive sensing node close to the target area edge meets the target distribution rule, determine that the multiple touch area is to refer to touch more.
According to the method described in claim 2, it is characterized in that, the method also includes:

If the capacitive sensing node close to the target area edge is unsatisfactory for the target distribution rule, then according to the change amount signal of the capacitive sensing node close to the target area center, further determine that the multiple touch area is singly to refer to touch or refer to more to touch.
According to the method in claim 2 or 3, which is characterized in that the target distribution rule are as follows:

In the target area, the column where first edge node in i-th row capacitive sensing node, it is greater than first threshold with the distance between the column where the first edge node in i+1 row capacitive sensing node, and the column where the second edge node in the i-th row capacitive sensing node, it is greater than the first threshold with the distance between the column where the second edge node in the i+1 row capacitive sensing node, wherein, the first edge node is the capacitive sensing node that left end plays that first change amount signal is greater than second threshold, the second edge node is the capacitive sensing node that right end plays that first change amount signal is greater than the second threshold, the value of i is 1 to P, P is total line number of capacitive sensing node in the target area.
The method according to claim 3 or 4, which is characterized in that the basis further determines that the multiple touch area is singly to refer to touch or refer to more to touch close to the change amount signal of the capacitive sensing node at the target area center, comprising:

Determine that the M row close to the target area center × N arranges a capacitive sensing node, M and N are preset positive integer；

It calculates the M row × N and arranges the average value of the change amount signal of capacitive sensing node, Yi Jisuo State the average value of the change amount signal of other capacitive sensing nodes in target area in addition to the M row × N arranges a capacitive sensing node；

If the M row × N, which arranges the average value of the change amount signal of capacitive sensing node, determines the multiple touch area then less than the average value of the change amount signal of other capacitive sensing nodes singly to refer to touch；

If the M row × N arranges the average value of the change amount signal of capacitive sensing node, more than or equal to the average value of the change amount signal of other capacitive sensing nodes, then determine that the multiple touch area is to refer to touch more.
The method according to claim 3 or 4, which is characterized in that the basis further determines that the multiple touch area is singly to refer to touch or refer to more to touch close to the change amount signal of the capacitive sensing node at the target area center, comprising:

Determine that the M row close to the target area center × N arranges a capacitive sensing node, M and N are preset positive integer；

It calculates the M row × N and arranges a flatness for the capacitance change of capacitive sensing node, the flatness is equal toWherein, K is the logarithm that the M row × N arranges adjacent capacitor sense node in a capacitive sensing node, and Δ C is the difference of the change amount signal of two neighboring capacitive sensing node, and K is positive integer, and j is the positive integer no more than K；

If the flatness is less than or equal to third threshold value, the multiple touch area is determined singly to refer to touch；

If the flatness is greater than third threshold value, determine that the multiple touch area is to refer to touch more.
Method according to any one of claim 1 to 6, it is characterized in that, it is described when there are multiple touch areas, according to the regularity of distribution of the change amount signal of the capacitive sensing node of the multiple touch area, the multiple touch area is determined singly to refer to touch or refer to more and touch, comprising:

When there are multiple touch areas, and in the multiple touch area, when the centre distance between at least one touch area in each touch area and other touch areas is less than four threshold values, according to the regularity of distribution of the change amount signal of the capacitive sensing node of the multiple touch area, the multiple touch area is determined singly to refer to touch or refer to more and touch.
Method according to any one of claim 1 to 7, which is characterized in that after determining the multiple touch area singly to refer to touch, the method also includes:

Minimum rectangular area including the multiple touch area is locked, to form ' locked ' zone；

When touch point is by the multiple touch area, slides into other multiple touch areas Chong Die with the ' locked ' zone, other described multiple touch areas are determined singly to refer to touch.
According to the method described in claim 8, it is characterized in that, the method also includes:

If it is determined that the multiple touch area is singly to refer to touch, then the position of the ' locked ' zone is reported.

If it is determined that the multiple touch area is to refer to touch more, then the multiple touch area respective positions are reported.
A kind of touch detecting apparatus characterized by comprising

Processing module determines touch area for the change amount signal according to multiple capacitive sensing nodes；

The processing module is also used to, and when there are multiple touch areas, according to the regularity of distribution of the change amount signal of the capacitive sensing node of the multiple touch area, determines the multiple touch area singly to refer to touch or refer to more and touch.
Touch detecting apparatus according to claim 10, which is characterized in that the processing module is specifically used for:

Determine whether the capacitive sensing node close to the edge of the target area of the multiple touch area composition meets target distribution rule；

If the capacitive sensing node close to the target area edge meets the target distribution rule, determine that the multiple touch area is to refer to touch more.
Touch detecting apparatus according to claim 11, which is characterized in that the processing module is also used to:

If the capacitive sensing node close to the target area edge is unsatisfactory for the target distribution rule, then according to the change amount signal of the capacitive sensing node close to the target area center, further determine that the multiple touch area is singly to refer to touch or refer to more to touch.
Touch detecting apparatus according to claim 11 or 12, which is characterized in that the target distribution rule are as follows:

In the target area, the column where first edge node in i-th row capacitive sensing node, it is greater than first threshold with the distance between the column where the first edge node in i+1 row capacitive sensing node, and the column where the second edge node in the i-th row capacitive sensing node, it is greater than the first threshold with the distance between the column where the second edge node in the i+1 row capacitive sensing node, wherein, the first edge node is the capacitive sensing node that left end plays that first change amount signal is greater than second threshold, the second edge node is the capacitive sensing node that right end plays that first change amount signal is greater than the second threshold, the value of i is 1 to P, P is total line number of capacitive sensing node in the target area.
Touch detecting apparatus according to claim 12 or 13, which is characterized in that the processing module is specifically used for:

Determine that the M row close to the target area center × N arranges a capacitive sensing node, M and N are preset positive integer；

Calculate the average value of the change amount signal of other capacitive sensing nodes in the average value and the target area of the M row × N column capacitive sensing node change amount signal in addition to the M row × N arranges a capacitive sensing node；

If the M row × N, which arranges the average value of the change amount signal of capacitive sensing node, determines the multiple touch area then less than the average value of the change amount signal of other capacitive sensing nodes singly to refer to touch；

If the M row × N arranges the average value of the change amount signal of capacitive sensing node, more than or equal to the average value of the change amount signal of other capacitive sensing nodes, then determine that the multiple touch area is to refer to touch more.
Touch detecting apparatus according to claim 12 or 13, which is characterized in that the processing module is specifically used for:

Determine that the M row close to the target area center × N arranges a capacitive sensing node, M and N are preset positive integer；

It calculates the M row × N and arranges a flatness for the capacitance change of capacitive sensing node, the flatness is equal toWherein, K is the logarithm that the M row × N arranges adjacent capacitor sense node in a capacitive sensing node, and Δ C is the difference of the change amount signal of two neighboring capacitive sensing node, and K is positive integer, and j is the positive integer no more than K；

If the flatness is less than or equal to third threshold value, the multiple touch area is determined singly to refer to touch；

If the flatness is greater than third threshold value, determine that the multiple touch area is to refer to touch more.
Touch detecting apparatus described in any one of 0 to 15 according to claim 1, which is characterized in that the processing unit is specifically used for:

When there are multiple touch areas, and in the multiple touch area, when the centre distance between at least one touch area in each touch area and other touch areas is less than four threshold values, according to the regularity of distribution of the change amount signal of the capacitive sensing node of the multiple touch area, the multiple touch area is determined singly to refer to touch or refer to more and touch.
Touch detecting apparatus described in any one of 0 to 16 according to claim 1, which is characterized in that The processing module is also used to:

When determining the multiple touch area singly to refer to touch point, the minimum rectangular area including the multiple touch area is locked, to form ' locked ' zone；

When touch point is by the multiple touch area, slides into other multiple touch areas Chong Die with the ' locked ' zone, other described multiple touch areas are determined singly to refer to touch.
Touch detecting apparatus according to claim 17, which is characterized in that the processing module is also used to:

If it is determined that the multiple touch area is singly to refer to touch, then the position of the ' locked ' zone is reported；

If it is determined that the multiple touch area is to refer to touch more, then the multiple touch area respective positions are reported.
A kind of touch chip, which is characterized in that including the touch detecting apparatus as described in any one of the claims 10 to 18.
A kind of electronic equipment, which is characterized in that including multiple capacitive sensing nodes, and the touch detecting apparatus as described in any one of the claims 10 to 18 or the touch chip as described in claim 19.