CN103472962B - A kind of method identifying touch type of capacitor - Google Patents

Abstract

The present invention relates to a kind of method identifying touch type of capacitor, comprise the following steps: 1) coefficient threshold k is set_{finger_th}、k_{palm_th}；2) induction point that in the range of touch, electrically change is maximum is found out, when its data value is more than predetermined threshold value, if point centered by it；3) data value of each induction point in the n × n matrix around intercepting central point；4) circulate the interior data value of each induction point in addition to central point of n × n matrix successively, find out minima A_minAnd maximum A_max, A_min、A_maxInduction point corresponding respectively is little induction point, big induction point；5) in n × n matrix in addition to central point, little induction point, big induction point the data value of each induction point add up, obtain A_sum；6) with the data value A of central point_InFor radix, calculate the coefficient k of this central point, 7) by coefficient k and k_{finger_th}、k_{palm_th}Compare and judge to determine touch type of capacitor.The present invention can identify touch type of capacitor accurately and rapidly.

Description

A kind of method identifying touch type of capacitor

[technical field]

The present invention relates to data processing method, be specifically related to a kind of method identifying touch type of capacitor, wherein, Touch type of capacitor includes following three types: normal touch, fat finger touch, wide area touch.

[background technology]

In the handheld device such as smart mobile phone, panel computer, it is more and more extensive that touch technology is applied, to touching The requirement of control is more and more higher.During normal use, following three kinds of touch type may be produced:

Normal touch (Finger): the click scope of normal touch thing, according to the size of screen, it may be determined that Can the induction range of maximum effect during normal touch；

Fat finger touches (Fat): touching object Area comparison is big, as more fat in touched finger, now touches Scope may relate to the induction range more than or equal to two normal point, during process can not by normal Multipoint process, Must identify and then process by single-touch；

Wide area touch (Palm): some special scene, it is possible to create bump contact, such as face during phone Portion's contact, palm contact by mistake.These scenes need to identify, do special handling, it is impossible at every touch Reason.

Touch chip quickly identifies actual touch action, accurately distinguishes finger normal, fat, large area maloperation Type, carries out follow-up process, it is possible to achieve the interactive experience that user is optimal.

In contact panel, the most all it is covered with the indium tin metal of some sensing elements, such as capacitance touch screen Oxide (ITO).Sensing element is induction point, arranges in a certain way, such as common matrix type row Row mode.The arranging density of induction point may determine that the resolution of touch screen.If typically having finger to touch, The change of electrical characteristics can be produced on induction point.Generally, the resolution of screen is very thin, and touch objects can not be only Touch some induction point.In certain scope, multiple induction points have corresponding electrically change, often The electric change of individual induction point has the data value An of correspondence to carry out quantization means, and the electrically change of induction point is more Greatly, the data value An of its correspondence is the biggest, An > 0.

[summary of the invention]

The technical problem to be solved in the present invention is to provide a kind of method identifying touch type of capacitor, its can accurately, Identify normal touch rapidly, fat finger touches, wide area touch.

Above-mentioned technical problem solves by the following technical programs:

A kind of method identifying touch type of capacitor, described touch type of capacitor includes normal touch, fat finger Touch, wide area touch, said method comprising the steps of:

1) threshold coefficient k is set_{finger_th}、k_{palm_th}, 0 < k_{finger_th}<k_{palm_th}；

2) for touching every time, the induction point that in the range of touch, electrically change is maximum is found out, when its data When value is more than predetermined threshold value, if point centered by it；The setting of predetermined threshold value is avoided also entering the little touch of mistake Row identifies；

3) data value of each induction point in the n × n matrix around intercepting central point, n is the natural number more than 1, N can choose according to actual screen parameter, and therefore, choosing of n can not cause n × n matrix to exceed The actual size of touch panel；

4) circulate the interior data value of each induction point in addition to central point of n × n matrix successively, find out a minimum Value A_minAnd a maximum A_max, A_min、A_maxInduction point corresponding respectively is little induction point, big induction point；

5) interior for the n × n matrix data value of each induction point in addition to central point, little induction point, big induction point Add up, obtain A_sum；

6) with the data value A of central point_InFor radix, calculate the coefficient k of this central point,

7) judged by coefficient k:

k≤k_{finger_th}, the touch type of this touch is normal contact；

k_{finger_th}<k≤k_{palm_th}, the touch type of this touch is the contact of fat finger；

k>k_{palm_th}, the touch type of this touch is bump contact.

Wherein, above-mentioned coefficient threshold k_{finger_th}、k_{palm_th}, k_{finger_th}、k_{palm_th}The size of value and actual touch surface Plate, touch-control IC detection is relevant, can carry out debugging correction according to concrete project；Particularly as follows: combine above-mentioned Step 2 in method)-step 6) carries out the most different types of touch and adds up, then according to specifically apply into The selected k of row_{finger_th}、k_{palm_th}Value.

It addition, the most required coefficient k, can be as the scope of touch or the reference value of touch pressure.

The principle of the present invention is: during touch, and the induction point on panel can produce the change of electrical characteristic；With one Individual induction point is unit, and touch objects is the most with the induction point contact area on panel, the electric change on induction point Change the biggest；Thus may determine that go out central point, then choose a range of induction point conduct around central point Original data object；In order to eliminate the noise impact on some induction point, before the computation, first traversal is selected All of initial data in the range of taking, finds out in addition to central point minima and a maximum is given up Abandon, be not involved in calculating, the total data value in addition to the data value of minima, maximum and central point is tired out Add；Owing to the electric variable quantity around each induction point has a certain distance, therefore, after accumulation, Selection Center point, as radix, uses cumulative numerical value to obtain final coefficient k, coefficient divided by the numerical value of central point The value size of k just can be the most very easily as the basis for estimation of the scope of touch；Due to normal touch, fat hands Refer to that touch, the physical characteristic of large area mistaken touch just show in contact area, the therefore k system of three kinds of situations Number can show the characteristic increased successively；According to actual panel and touch-control IC, two threshold values k are set_{finger_th}、 k_{palm_th}, by judgement factor k (0, k_{finger_th}]、(k_{finger_th},k_{palm_th}], (k_{palm_th}, ∞] judge in three intervals The touch type of this touch, thus realization identifies normal touch accurately and rapidly, fat finger touches, Wide area touch.

[accompanying drawing explanation]

Fig. 1 is the simple block diagram of induction point distribution；

3 × 3 matrixes of surrounding are put centered by Fig. 2；

Fig. 3 judges schematic diagram for touching classification.

[detailed description of the invention]

As shown in Figure 1, it is assumed that contact panel has been evenly distributed 54 induction points, its corresponding coefficient threshold k_{finger_th}=3.5、k_{palm_th}=4.5；The method being identified touch type of capacitor on this contact panel, including Following steps:

G1) once touch, determine that the induction point that in the range of this time touches in touching, electrically change is maximum is B4_6 induction point, owing to its data value 240 is more than pre-set threshold value 160, if point centered by it；Certainly, in advance If the size of threshold values can be configured according to reality application；

G2) data value of each induction point, the size of matrix in 3 × 3 matrixes around intercepting central point B4_6 Can choose according to actual screen parameter；

G3) the interior data value of each induction point in addition to central point of 3 × 3 matrixes is circulated successively, specifically such as Fig. 2, Find out minima A_minA=A7=23 and maximum A_max=A4=140, A_min、A_maxThe most corresponding Induction point is little induction point B5_5, big induction point B4_5；

G4) interior for 3 × 3 matrixes in addition to central point B4_6, little induction point B5_5, big induction point B4_5 The data value of each induction point adds up, and obtains A_sum=A1+A2+A3+A6+A8+A9=448；

G5) with the data value A of central point_In=160 is radix, calculates the coefficient of this central point B4_6 induction point K,

G6) as it is shown on figure 3, (0, k_{finger_th}]、(k_{finger_th},k_{palm_th}], (k_{palm_th}, ∞] and three interval correspondences respectively Normal touch (Finger), fat finger touch (Fat), wide area touch (Palm), due to coefficient k < k_{finger_th}, The touch type of this touch is normal contact.

Wherein, coefficient threshold k_{finger_th}、k_{finger_th}Size relevant with actual contact panel and touch-control IC detection, Debugging correction can be carried out according to concrete project.

The present invention is not limited to above-described embodiment, based on above-described embodiment, do not make the letter of creative work Single replacement, it should belong to the scope that the invention discloses.

Claims (1)

1. the method identifying touch type of capacitor, described touch type of capacitor includes the touch of normal touch, fat finger, wide area touch, said method comprising the steps of:

1) coefficient threshold k is set_{finger_th}、k_{palm_th}, 0 ＜ k_{finger_th}＜ k_{palm_th}；

2) for touching every time, the induction point that the change of electrical characteristic is maximum in the range of touch is found out, when its data value is more than predetermined threshold value, if point centered by it；

3) data value of each induction point in the n × n matrix around intercepting central point, n is the natural number more than 1；

4) circulate the interior data value of each induction point in addition to central point of n × n matrix successively, find out minima A_minAnd a maximum A_max, A_min、A_maxInduction point corresponding respectively is little induction point, big induction point；

5) in n × n matrix in addition to central point, little induction point, big induction point the data value of each induction point add up, obtain A_sum；

6) with the data value A of central point_InFor radix, calculate the coefficient k of this central point,

7) judged by coefficient k:

k≤k_{finger_th}, the touch type of this touch is normal contact；

k_{finger_th}＜ k≤k_{palm_th}, the touch type of this touch is the contact of fat finger；

K ＞ k_{palm_th}, the touch type of this touch is bump contact.