CN103777826B - Self-contained touch control device and control method thereof - Google Patents

Abstract

The invention provides a self-contained touch control device. The self-contained touch control device comprises a plurality of electrodes, a plurality of inductors and a number determination module, wherein the inductors are used for detecting the capacitance variation of the electrodes so that a plurality of induction quantities can be generated, and the number determination module is used for calculating the total induction quantity according to the induction quantities, and determining the number of contacted points according to the total induction quantity.

Description

Self-tolerant contactor control device and its control method

Technical field

The present invention is related to touch-control system, and especially related to the self-tolerant contactor control device enabling multi-point touch.

Background technology

It is showing improvement or progress day by day with science and technology, in recent years all more and more hommizations of the operation interface of various electronic products.For example, Through Touch Screen, user directly can operate formula, input message/word/pattern on screen with finger or pointer, save Go the trouble using input equipment such as keyboard or buttons.In fact, Touch Screen generally by an induction panel and is arranged at sensing The display composition at panel rear.The position that electronic installation is touched on induction panel according to user, and show at that time The picture that device is presented, to judge the meaning of this touching, and to execute corresponding operating result.

Existing capacitance touching control technology can be divided into self-tolerant (self-capacitance) and mutual capacitance type (mutual- Capacitance) two class.With respect to mutual-capacitive touch panel, self-capacitance type touch panel can be by the more simple monolayer electricity of processing procedure Pole structure is realized, and has lower-cost advantage, is therefore widely used in low order electronic product.

Fig. 1 is a self-capacitance type touch panel example.It is provided with multiple each approximate in the induction region 100 being represented with dotted line frame Electrode in right angled triangle.Each electrode is each attached to upper induction apparatuss 12 or lower induction apparatuss 14.These induction apparatuss 12nd, 14 capacitance changes recording can be transferred into a controller (not illustrating), judges, for this controller, the position that user touches Put.Existing controller is to calculate user touch location coordinate x in the X direction according to following calculating formula mostly：

$x=\frac{\underset{i=1}{\overset{N}{\mathrm{\Σ}}}(C_i*X_i)}{\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{C}_i},$ (formula one)

Wherein N represents the quantity of all induction apparatuss, i=1～N, C_iI-th induction apparatus representing in this N number of induction apparatus are surveyed The capacitance change obtaining, X_iIt is then the center of gravity coordinate representing the electrode that i-th induction apparatus are connected in the X direction.

On the other hand, existing controller calculates user touch location in the Y direction according to following calculating formula mostly Coordinate y：

$y=\left(\frac{r*C_U-C_D}{r-1}\right)*\left(\frac{L}{C_T}\right),$ (formula two)

Wherein r represents a special value related to electrode size, C_URepresent the electric capacity that all upper induction apparatuss 12 record Variable quantity summation, C_DRepresent the capacitance change summation that all lower induction apparatuss 14 record, C_TFor C_UAnd C_DSummation, L represent Electrode height in the Y direction.In fact, these electrodes are respectively as shown in Figure 2 tall and thin trapezoidal, boundary length is thereon Dxs, lower boundary length is dxl.Numerical value r is defined as follows：

$r\≡\frac{\mathrm{dxl}+0.9*\mathrm{dxx}}{\mathrm{dxs}+0.9*\mathrm{dxx}},$ (formula three)

Wherein dxx represents two adjacent interelectrode gap widths.

Be can be seen that by formula two and formula three, the controller of existing self-capacitance type touch panel only can produce in each time point Represent one to be subject to touch one group of coordinate (x, y) of position, be therefore only used for the judgement of single-point touch.It is limited to existing tactile from holding Control induction mechanism, current multi-point touch sensing is only capable of realizing using relatively costly mutual capacitance type contactor control device.

Content of the invention

For solving the above problems, the present invention proposes new self-tolerant contactor control device and its control method.Using total sensing amount As an index, the self-tolerant contactor control device according to the present invention and control method are judged to be subject to number of contacts, thus enable The multi-point touch control apparatus of low cost.

A specific embodiment according to the present invention is a kind of self-tolerant contactor control device, wherein comprises multiple electrodes, multiple sense Answer device and a quantity decision module.The plurality of induction apparatuss in order to detect the capacitance change of the plurality of electrode, to produce multiple senses Ying Liang.This quantity decision module is in order to calculate a total sensing amount according to the plurality of induction flowmeter, and determines one according to this total sensing amount By number of contacts.

It is a kind of control method being applied to a self-tolerant contactor control device according to the another specific embodiment of the present invention.Should be certainly Appearance formula contactor control device comprises multiple electrodes.This control method is first carried out a detecting step, detects an electric capacity of the plurality of electrode Variable quantity, to produce multiple sensing amounts.Subsequently, this control method executes a calculation procedure, calculates one according to the plurality of induction flowmeter Total sensing amount, and determine that one is subject to number of contacts according to this total sensing amount.

Another specific embodiment according to the present invention is a kind of self-tolerant contactor control device.This self-tolerant contactor control device comprises many Individual first electrode, multiple second electrode, multiple induction apparatuss and a locating module.The respective shape of the plurality of first electrode is approximate In a right angled triangle.The respective shape of the plurality of second electrode is similar to a parallelogram.The plurality of induction apparatuss are in order to examine Survey the capacitance change of the plurality of first electrode and the plurality of second electrode, to produce multiple sensing amounts.This locating module, in order to Determine to be subject to the location information of contact corresponding to a target.

Can be further understood by following detailed description and accompanying drawings with regard to the advantages and spirit of the present invention.

Brief description

Fig. 1 is to illustrate an existing self-capacitance type touch panel example.

Fig. 2 is a trapezoidal electrode pattern example.

Fig. 3, Fig. 4 are the block figure according to the self-tolerant contactor control device in embodiments of the invention.

Fig. 5 (A) and Fig. 5 (B) is in order to assume the relativeness example of sensing result and coordinate.

Fig. 6 illustrates an electrode configuration example.

Fig. 7 is according to the control method flow chart in one embodiment of the invention.

Main element symbol description

100：Induction region 12：Upper induction apparatuss

14：Lower induction apparatuss 300：Self-tolerant contactor control device

32：Electrode 34：Induction apparatuss

36：Quantity decision module 37：Grouping module

38：Locating module G1 ~ G3：Sensing amount group

T1、T2：Sensing amount threshold value S72 ~ S76：Process step

Specific embodiment

It is a kind of self-tolerant contactor control device according to one embodiment of the invention, its functional block diagram is as shown in Figure 3.This is from appearance Formula contactor control device 300 comprises multiple electrodes (generally representing with block 32), multiple induction apparatuss 34 and a quantity decision module 36.Palpus Illustrate, be not limited with given shape according to the electrode in the self-tolerant contactor control device of the present invention (for example can as triangle, side Shape, rhombus, bowtie-shaped or parallelogram), the number of electrodes that each induction apparatuss are connected also is not limited with one.Additionally, from Appearance formula contactor control device 300 can be incorporated in the various electronic installations with touch-control demand, also can be individually present.

These induction apparatuss 34 in order to detect the capacitance change of these electrodes 32, to produce multiple sensing amounts.Quantity determines Module 36 then calculates total sensing amount U according to the plurality of induction flowmeter_T, determine that one is subject to number of contacts according to this.In practice, if known make It is U that user imposes the average sensing amount size that can cause during single-point contact to self-tolerant contactor control device 300_S, just can be according to U_SDetermine One or more threshold values, as benchmark.For example, quantity decision module 36 can be with 1.5*U_SAnd 2.5*U_SFor door Threshold value.When this total sensing amount U_TLess than 1.5*U_S, the touching that quantity decision module 36 deduction this time occurs is single-point contact；When this Total sensing amount U_TSize fall in 1.5*U_STo 2.5*U_SBetween, the touching that quantity decision module 36 deducibility this time occurs is double Point touch, and can the rest may be inferred.In practical application, the size and number of above-mentioned threshold value all can adjust according to actual demand, no It is limited with special value.

Self-tolerant contactor control device 300 can be alone applied in directly according to quantity decision module 36 output by number of contacts Produce the situation of differential responses, also can be as shown in figure 4, comprising grouping module 37 and locating module 38 further.In this embodiment In, quantity decision module 36 except its judged by number of contacts in addition to, the sensing amount also producing these induction apparatuss 34 transmits To grouping module 37, grouping module 37 is made to be grouped these sensing amounts according to by number of contacts, to produce a group result.

Fig. 5 (A) and Fig. 5 (B) presents produced two kinds of sensing results according to embodiments of the present invention, and the transverse axis of in figure is The coordinate representing in a one-dimensional fashion, the longitudinal axis is the sensing amount size corresponding to each coordinate points.It is assumed that quantity is determined in Fig. 5 (A) Cover half block 36 judge by number of contacts as two, grouping module 37 is found accordingly and is judged probability highest in these sensing amounts Two group G1, G2, as this group result.

Subsequently, locating module 38 just produces according to this group result and these sensing amounts and one or more is provided by contact position News.In this embodiment, quantity decision module 36 judge by number of contacts as two, locating module 38 judges according to grouping module Group G1 in five induction flowmeters calculate first coordinate being subject to contact, and calculate the according to five induction flowmeters in group G2 Two coordinates being subject to contact.These location informations can be further acted as the foundation judging user meaning.

Grouping module 37 is found and is judged the method for group result details are as follows.In practice, the sensing amount by contact is distributed It is mostly mountain peak shape, grouping module 37, when finding effective sensing amount group, can be found on one first in these sensing amounts The trend of liter, is further continued for finding a downward trend.

In an embodiment, grouping module 37, before being grouped, is first eliminated from these sensing amounts and is less than one first The sensing amount of threshold value T1, the interference sensing amount being caused with exclusive segment non-ideal factor (such as dust fall), to judge many effective feelings Ying Liang.For situation depicted in regard to Fig. 5 (A), the sensing amount in only group G1, G2 is retained, and other are less than threshold value T1's Sensing amount is eliminated.

In another embodiment, grouping module 37 adopts one second threshold value T2 as the foundation of screening group.Clearer and more definite Ground is said, all must comprise at least one the sensing amount higher than the second threshold value T2 in each group of sensing amount.Depicted with regard to Fig. 5 (B) Situation for, the group G3 only meeting above-mentioned condition can be grouped module 37 and selects.If what quantity decision module 36 judged is subject to Number of contacts is two, and grouping module 37 only finds out a group G3, then group G3 can be considered as two very by grouping module 37 Close touch point, and group G3 is divided further into two subgroup.It is obvious that the present invention can be prevented effectively from two non- Very close to touch point be mistaken for the situation of.

In practice, if the group result that grouping module 37 produces points out that a target is corresponded in these sensing amounts by contact N number of target sensing amount (N is positive integer), locating module 38 can according to following equation calculate this target be subject to contact coordinate (x, y)：

$x=\frac{\underset{i=1}{\overset{N}{\mathrm{\Σ}}}(C_i*X_i)}{\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{C}_i},$ (formula four)

$y\frac{\underset{i=1}{\overset{N}{\mathrm{\Σ}}}(C_i*Y_i)}{\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{C}_i},$ (formula five)

Wherein C_iRepresent i-th target sensing amount in N number of target sensing amount.This i-th target sensing amount is corresponding to electrode At least one electrode in 32, X_iRepresent this at least one electrode in the position of centre of gravity of X-direction, Y_iRepresent this at least one electrode in Y-direction Position of centre of gravity.If a target sensing amount is corresponding to multiple electrodes, above-mentioned position of centre of gravity is the common center of gravity of the plurality of electrode Position.Formula four and formula five are applied to variously-shaped electrode, comprise the electrode being similar to right angled triangle shown in Fig. 1, and Right angled triangle electrode shown in Fig. 6 and parallelogram electrode situation about depositing.Right angled triangle is similar to regard to electrode shape Situation for, compared to formula two, more accurate according to the coordinate y that formula five calculates.It should be noted that, formula four and formula five should It is not limited to the self-tolerant contactor control device that Fig. 3, Fig. 4 present with scope.

It is a kind of control method being applied to a self-tolerant contactor control device according to the another specific embodiment of the present invention, its stream Journey figure is as shown in Figure 7.This self-tolerant contactor control device comprises multiple electrodes.This control method is first carried out step S72, detects that this is many The capacitance change of individual electrode, to produce multiple sensing amounts.Subsequently, this control method execution step S74, according to the plurality of sensing Amount calculates a total sensing amount.Step S76 is then to determine that one is subject to number of contacts according to this total sensing amount.

Previously (for example can be grouped further and be determined introducing the various change describing during self-tolerant contactor control device 300 Position) also can apply depicted in Fig. 7 image treatment method in, its details repeats no more.

As described above, the present invention proposes new self-tolerant contactor control device and its control method.Using total sensing amount as one Index, the self-tolerant contactor control device according to the present invention and control method are judged to be subject to number of contacts, thus enable low cost Multi-point touch control apparatus.

By the above detailed description of preferred embodiments it would be desirable to more clearly describe feature and the spirit of the present invention, and Not scope of the invention is any limitation as with above-mentioned disclosed preferred embodiment.On the contrary, its objective is to wish Can cover in various changes and the category being arranged in the scope of the claims that the present invention to be applied for of tool equality.

Claims (11)

1. a kind of self-tolerant contactor control device, comprises：

Multiple electrodes；

Multiple induction apparatuss, in order to detect the capacitance change of the plurality of electrode, to produce multiple sensing amounts；

One quantity decision module, in order to calculate a total sensing amount according to the plurality of induction flowmeter, and determines one according to this total sensing amount By number of contacts；

One grouping module, in order to according to being grouped the plurality of sensing amount by number of contacts, to produce a group result；And

One locating module, in order to according to this group result and the plurality of sensing amount produce corresponding to this be subject to one of number of contacts or Multiple location informations by contact；

Wherein, the plurality of sensing amount is divided into one or more groups of sensing amounts as this group result, each group of sense by this grouping module At least one sensing amount in should measuring is higher than one second threshold value, and this second threshold value is for confirming the plurality of sensing amount corresponding at least One is subject to contact.

2. self-tolerant contactor control device as claimed in claim 1 is it is characterised in that this grouping module is washed in a pan according to one first threshold value Eliminate the plurality of sensing amount of part, this first threshold value is for excluding at least one interference sensing amount in the plurality of sensing amount, and is somebody's turn to do Locating module produces according to the plurality of sensing amount retaining should be by the positions of contact by the one or more of number of contacts corresponding to this Put information.

3. self-tolerant contactor control device as claimed in claim 1 is it is characterised in that the plurality of sensing amount is divided into by this grouping module One or more groups of sensing amounts are as this group result, and search out an ascendant trend and a decline in the plurality of sensing amount During trend, judge that the plurality of sensing amount between this ascendant trend and this downward trend is one group of actual induction amount.

4. self-tolerant contactor control device as claimed in claim 1 is it is characterised in that the target pointed by this group result is touched Point is a positive integer corresponding to the N number of target sensing amount in the plurality of sensing amount, N, and this locating module is according to following equation meter Calculate the location information that this target is subject to contact, comprise one first coordinate x and one second coordinate y：

$x=\frac{\underset{i=1}{\overset{N}{\Σ}}(C_i*X_i)}{\underset{i=1}{\overset{N}{\Σ}}{C}_i},$

$y=\frac{\underset{i=1}{\overset{N}{\Σ}}(C_i*Y_i)}{\underset{i=1}{\overset{N}{\Σ}}{C}_i},$

Wherein C_iRepresent one i-th target sensing amount in this N number of target sensing amount, this i-th target sensing amount is corresponding at least one electricity Pole, X_iRepresent this at least one electrode in one first position of centre of gravity of a first direction, Y_iRepresent this at least one electrode in a second party To one second position of centre of gravity.

5. a kind of control method being applied to a self-tolerant contactor control device, this self-tolerant contactor control device comprises multiple electrodes, this control Method processed comprises：

A () detects a capacitance change of the plurality of electrode, to produce multiple sensing amounts；

B () calculates a total sensing amount according to the plurality of induction flowmeter, and determine that one is subject to number of contacts according to this total sensing amount；

C the plurality of sensing amount should be grouped, to produce a group result by () basis by number of contacts；And

(d) according to this group result and the plurality of sensing amount produce corresponding to this be subject to number of contacts one or more by contact Location information；

Wherein, this group result is one or more groups of sensing amounts, and each group of sensing amount comprises higher than one second threshold value at least One sensing amount, this second threshold value is subject to contact for confirming the plurality of sensing amount corresponding at least one.

6. control method as claimed in claim 5 is it is characterised in that step (c) comprises：

Eliminate the plurality of sensing amount of part according to one first threshold value, this first threshold value is for excluding in the plurality of sensing amount At least one disturbs sensing amount, and step (d) produces according to the plurality of sensing amount retaining and is subject to the one of number of contacts corresponding to this Individual or multiple location informations that should be subject to contact.

7. control method as claimed in claim 5 it is characterised in that this group result be one or more groups of sensing amounts, step C () comprises：

When searching out an ascendant trend and a downward trend in the plurality of sensing amount, judge this ascendant trend and this decline The plurality of sensing amount between trend is one group of actual induction amount.

8. control method as claimed in claim 5 is it is characterised in that this group result points out that a target is corresponded to by contact and is somebody's turn to do N number of target sensing amount in multiple sensing amounts, N is a positive integer, and step (d) comprises to calculate this target according to following equation and is subject to The location information of contact, comprises one first coordinate x and one second coordinate y：

$x=\frac{\underset{i=1}{\overset{N}{\Σ}}(C_i*X_i)}{\underset{i=1}{\overset{N}{\Σ}}{C}_i},$

$y=\frac{\underset{i=1}{\overset{N}{\Σ}}(C_i*Y_i)}{\underset{i=1}{\overset{N}{\Σ}}{C}_i},$

Wherein C_iRepresent one i-th target sensing amount in this N number of target sensing amount, this i-th target sensing amount is corresponding at least one electricity Pole, X_iRepresent this at least one electrode in one first position of centre of gravity of a first direction, Y_iRepresent this at least one electrode in a second party To one second position of centre of gravity.

9. a kind of self-tolerant contactor control device, comprises：

Multiple first electrodes, respective shape is similar to a right angled triangle；

Multiple second electrodes, respective shape is similar to a parallelogram；

Multiple induction apparatuss, in order to detect the capacitance change of the plurality of first electrode and the plurality of second electrode, multiple to produce Sensing amount；

One quantity decision module, in order to calculate a total sensing amount according to the plurality of induction flowmeter, and determines one according to this total sensing amount By number of contacts；

One grouping module, in order to according to should by number of contacts, the plurality of sensing amount be grouped, with produce multiple actual induction amounts with And a group result；And

One locating module, produces the location information that a target is subject to contact, bag according to this group result and the plurality of actual induction amount Containing one first coordinate x and one second coordinate y, it is expressed as：

$x=\frac{\underset{i=1}{\overset{N}{\Σ}}(C_i*X_i)}{\underset{i=1}{\overset{N}{\Σ}}{C}_i},$

$y=\frac{\underset{i=1}{\overset{N}{\Σ}}(C_i*Y_i)}{\underset{i=1}{\overset{N}{\Σ}}{C}_i},$

Wherein this target is corresponded to the N number of target sensing in the plurality of sensing amount by contact and measures, and N is a positive integer, C_iRepresent this N One i-th sensing amount in individual sensing amount, this i-th sensing amount corresponding in the plurality of first electrode and the plurality of second electrode extremely A few electrode, X_iRepresent this at least one electrode in one first position of centre of gravity of a first direction, Y_iRepresent this at least one electrode in one One second position of centre of gravity of second direction；

Wherein, the plurality of actual induction amount is divided into one or more groups of actual induction amounts as this group result by this grouping module, Each group of actual induction amount comprises at least one sensing amount higher than one second threshold value.

10. self-tolerant contactor control device as claimed in claim 9 is it is characterised in that this grouping module is according to one first threshold value The plurality of sensing amount of superseded part, to produce the plurality of actual induction amount.

11. self-tolerant contactor control devices as claimed in claim 9 are it is characterised in that this grouping module is by the plurality of actual induction Amount is divided into one or more groups of actual induction amounts to search out an ascendant trend as this group result, and in the plurality of sensing amount And during a downward trend, judge that the plurality of sensing amount between this ascendant trend and this downward trend is the plurality of actual induction Amount, and one group of actual induction amount.