CN104216572A - Touch screen and touch detection method and device - Google Patents
Touch screen and touch detection method and device Download PDFInfo
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- CN104216572A CN104216572A CN201310217383.3A CN201310217383A CN104216572A CN 104216572 A CN104216572 A CN 104216572A CN 201310217383 A CN201310217383 A CN 201310217383A CN 104216572 A CN104216572 A CN 104216572A
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Abstract
The invention relates to a touch screen and a touch detection method and device. The method includes the steps that direct-axis scanning is carried out on a scanning area, and when at least one touch is detected, the direct axis of blocked scanning light is recorded; the scanning area is reduced according to the direct axis of the blocked scanning light; axis scanning is carried out on the reduced scanning area to obtain the position of the touch. The device correspondingly comprises a scanning unit, a recording unit and an area reducing unit. The touch detection method and device can reduce power consumption of the touch screen.
Description
Technical field
The present invention relates to computing machine touch-control field, particularly a kind of touch-screen, touch detecting method and device.
Background technology
Infrared touch panel belongs to computing machine touch-screen, and as a kind of input equipment of hommization, infrared touch panel has vast potential for future development.Infrared touch panel because of install simple and easy, be easy to safeguard, the advantage such as anti-knock properties are high, reliability is strong and be widely used in every field.
The basic structure of infrared touch panel is installed some to infrared emission and infrared receiver component in a certain order a display surface edge being applicable to installing.These transmitting and receiving elements form launch and accept pair according to mode one to one, edge along display surface forms a mutually perpendicular launch and accept array, every a pair transmitting and receiving element is connected in a certain order respectively under the control of microcomputer system, whether the infrared ray detected between often pair of transmitting and receiving element is cut off, and has determined whether that touch event occurs with this.
In prior art, a kind ofly detect the method for touch point on touch-screen and comprise: start infrared touch panel, select successively in order to connect often pair of infrared emission and receiving element, scan whole touch area; Record the transmitting and receiving of connecting when infrared ray is cut off each time respectively to the intrinsic coordinates value of element; According to recorded above-mentioned intrinsic coordinates value, by the combination of coordinate figure in length and breadth to obtain the coordinate figure of touch point and to store; To whole touch area carry out at least one times rescan reject false touch point; The coordinate figure of obtained true touch point is converted to the receptible data of computer system of installing described touch-screen, and is transferred among described computer system by the interface of described touch-screen.The microprocessor reality of touch-screen carries out at least twice sweep to whole touch area is actual within a scan period, comprises d-axis scanning at least one times and scans from axle at least one times; Even if not touch on touch area, be also that Multiple-Scan is set within a scan period.
Prior art detects the technical scheme touched and at least there is following defect:
Needing to carry out the Multiple-Scan within the scope of whole touch area to the one-time detection touched, the power consumption expending touch-screen is higher;
Within the free time for the treatment of generation touch, the microprocessor reality of touch-screen is also carried out repeatedly d-axis scanning a scan period and scans from axle, and its scan period is long thus; Scan period is long not only can increase unnecessary power consumption for touch-screen, also can extend the touch-screen response time, thus reduces the usability of equipment.
In prior art, detect the method that touch-screen touches be included in the scan period interior scanning of the d-axis at least one times to whole touch area and scan from axle at least one times, and wait occur touch free time in occur scan period and occur touch time in occur scan period be consistent, and the two scan period in carry out d-axis scanning and from axle scanning object, successively select connection element be all identical.This detection mode not only needs Multiple-Scan within the time that touch occurs, within the free time for the treatment of generation touch, also repeated scanning is carried out to whole touch area, not only add unnecessary power consumption but also the cycle detecting scanning can be increased, and then extend the touch-screen response time.
Summary of the invention
The technical matters that technical solution of the present invention solves is: the power consumption how reducing touch-screen.
In order to solve the problems of the technologies described above, technical solution of the present invention provides a kind of touch detecting method, comprising:
D-axis scanning being carried out to scanning area, when detecting that at least one touches, recording the d-axis of the scanning ray be cut off;
D-axis according to the described scanning ray be cut off reduces described scanning area;
Axle scanning is carried out with the position obtaining described touch to the scanning area after reducing.
Optionally, the d-axis of the scanning ray be cut off described in obtains by recording the corresponding axial location touched.
Optionally, the d-axis that described record is cut off scanning ray comprises that record is corresponding touches that reference position in the axial direction and final position or record are corresponding touches that reference position in the axial direction and width or record are corresponding touches width in the axial direction and final position.
Optionally, described in reduce after scanning area comprise at least one closed region of being intersected by the d-axis of the described scanning ray be cut off, each closed region comprises the touch that described at least one, d-axis Scanning Detction arrives.
Optionally, the scanning area after reducing described in intersects by the d-axis of the described scanning ray be cut off the maximum quadrilateral area formed.
Optionally, describedly axle scanning carried out to the scanning area after reducing comprise with the position obtaining described touch:
D-axis scanning is carried out to obtain some touches to be screened to the scanning area after described reducing;
Carry out scanning from axle and utilizing touching from the falseness in the described touch to be screened of result rejecting of axle scanning to determine actual touch to the scanning area after described reducing;
Export the position of described actual touch.
Optionally, describedly axle scanning carried out to the scanning area after reducing comprise with the position obtaining described touch:
Some touches to be screened are obtained according to the result scanned the d-axis of scanning area;
Carry out scanning from axle and utilizing touching from the falseness in the described touch to be screened of result rejecting of axle scanning to determine actual touch to the scanning area after described reducing;
Export the position of described actual touch.
In order to solve the problems of the technologies described above, technical solution of the present invention additionally provides a kind of touch detecting apparatus, it is characterized in that, comprising:
Scanning element, touches to detect at least one for carrying out d-axis scanning to scanning area;
Record cell, for when detecting that at least one touches, records the d-axis of the scanning ray be cut off;
Area reduction unit, the d-axis for the scanning ray be cut off described in basis reduces described scanning area;
Described scanning element is also for carrying out axle scanning with the position obtaining described touch to the scanning area after reducing, described scanning element comprises described first sub-scanning element.
In order to solve the problems of the technologies described above, technical solution of the present invention additionally provides a kind of touch-screen, comprises the noon
Touch area and microprocessor;
Described microprocessor comprises above-mentioned touch detecting apparatus.
Technical solution of the present invention has following beneficial effect at least:
Technical solution of the present invention only carried out scanning for " in advance " of scan period with a d-axis scanning to touch area in the free time of waiting to occur to touch, but not both carried out as prior art d-axis scanning also carry out scanning from axle, after touching and occurring, just touch area is re-started to scanning to shorten the scan period of touch-screen in free time of waiting to occur to touch, effectively can shorten touch-screen in the scan period of waiting to occur in the free time of touch, also the time from axle scanning and region is effectively reduced, shorten the touch-screen response time, reduce hardware deterioration, reduce the power consumption of touch-screen.
Technical solution of the present invention only scans the region that may occur to touch within time touch being detected, namely the scope of scanning area is reduced, this is from power consumption angle, reduce scanning area and must reduce used radiated element and the number of receiving element, corresponding region of carrying out from axle scanning also reduces greatly, reduces the power consumption of touch-screen accordingly further; From angle sweep time, because the region making scanning ray cover that reduces of scanning area diminishes, scanning required time also reduces, and shortens the touch-screen response time further, improves the detection efficiency of touch-screen; From accuracy of detection angle, under the prerequisite of the number of selected radiated element and receiving element, scanning area reduces and scanning ray density is increased, and can improve the degree of accuracy touching and detect.
Consider that reducing of scanning area need be relevant to the touch location that may exist to d-axis Scanning Detction, described in utilizing the information of the d-axis of the scanning ray be cut off recorded then can improve to define, reduce the accurate location in region.
In possibility, scanning area after reducing can be intersect by the d-axis of the described scanning ray be cut off the maximum quadrilateral area formed, also can be made up of (this quadrilateral area intersects by the d-axis of the described scanning ray be cut off the minimum quadrilateral area formed) at least one quadrilateral area: the former algorithm is simple, also can reach good low-power effect; Latter location is more accurate, and favourable follow-up accuracy detects.
Carrying out in the process of axle scanning to the scanning area after reducing, selected receiving element and the number of radiated element also greatly reduce in a preferred approach; Concrete, if select to connect can cover described in reduce the corresponding receiving element of rear scanning area and radiated element just passable, this makes the overall power of touch-screen get back saving; Certainly, more preferably, as long as select to have corresponding receiving element and the radiated element of the scanning area after reducing, now selected element is the element that can realize carrying out the scanning area after reducing the minimal amount of respective scanned, is the minimum power of starting element.
Technical solution of the present invention logic is simple, is easy to realize hardware-accelerated; Do not change other structures of existing touch-screen, the detection scanning of multiple touch point can be completed, there is the advantage that application cost is extremely low, applicability is wide.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the touch detecting method of embodiment 1;
Fig. 2 is the structural representation of a kind of touch-screen of embodiment 1;
The schematic diagram of Fig. 3 a kind of using state residing for touch-screen shown in Fig. 2;
The schematic diagram of Fig. 4 another kind of using state residing for touch-screen shown in Fig. 2;
Fig. 5 is the schematic flow sheet realizing step S102 in the touch detecting method of embodiment 1;
Fig. 6 is a kind of schematic diagram selecting d-axis to scan the touch-screen of radiated element and corresponding receiving element of embodiment 1;
Fig. 7 is the first selection of embodiment 1 scans the touch-screen of radiated element and corresponding receiving element schematic diagram from axle;
Fig. 8 is the schematic diagram that embodiment 1 the second selects the touch-screen scanning radiated element and corresponding receiving element from axle;
Fig. 9 is the third selection of embodiment 1 scans the touch-screen of radiated element and corresponding receiving element schematic diagram from axle;
Figure 10 is the schematic flow sheet of the touch detecting method of embodiment 2;
Figure 11 is the schematic flow sheet realizing step S202 in the touch detecting method of embodiment 2.
Embodiment
Embodiment 1
Present embodiments provide a kind of touch detecting method as shown in Figure 1, comprising:
Step S100, carries out d-axis scanning to scanning area, when detecting that at least one touches, records the d-axis of the scanning ray be cut off.
In this step, described d-axis scanning is the d-axis scanning in the scan period.
The present embodiment touch detecting method based on touch-screen, its structure as shown in Figure 2:
A kind of touch-screen 100 as shown in Figure 2, the rectangular touch screen that shown touch-screen 100 is made up of the radiated element array (102a, 102b) be arranged on around touch area 101, receiving element array (103a, 103b) forms.Wherein, touch area 101 is generally the viewing area as graphoscope, projector screen, radiated element and receiving element one_to_one corresponding and to form transmitting and receiving right.In specific implementation process, radiated element array (102a, 102b) is installed on expelling plate (104a, 104b), radiated element is specially the emission lamp of a transmitting infrared scan light, receiving element array) 103a, 103b) be installed on dash receiver (105a, 105b), radiated element is specially the receiving light of a reception infrared scan light.
In this step, touch-screen 100 enters d-axis scanning to touch area 101 within the free time for the treatment of generation touch, and now, owing to any contact not detected, the scanning area of carrying out d-axis scanning is whole touch area 101.So-called d-axis scanning, is launched by paired radiated element and receiving element and receives scanning ray (paired radiated element and receiving element also can be described as with right radiated element and receiving element).In the application, during the scanning of definition d-axis, the d-axis of scanning ray is consistent with the optical axis direction of paired radiated element and receiving element and in order to point to the touch area scope that scanning ray experiences region.In such as Fig. 2, radiated element 121 and receiving element 131 paired, radiated element 122 and receiving element 132 paired, because scanning ray is actual, there is one fixed width, the d-axis of the light that corresponding radiated element 121 and receiving element 131 produce is 107, and the d-axis of the light that corresponding radiated element 122 and receiving element 132 produce is 106.
In this step, the d-axis of the described scanning ray be cut off obtains by recording the corresponding axial location touched, wherein, because the position of the touch area, d-axis place of scanning ray be cut off all may exist touch, therefore, only get described may exist touch positional information on axle, described axis for comprising two-dimensional touch region horizontal and vertical (also can be X to and Y-direction), certainly for comprise three-dimensional tactile region Z-direction, X to and Y-direction.The axial position information touched can as the logical data of d-axis to instruct the present embodiment for the location of the scanning area after reducing.The axial position information touched is actual to be generated by d-axis data being carried out the data processing such as surround lighting, normalization.
The axial location that described correspondence touches comprises and corresponding touches reference position on this axle and final position, also can comprise correspondingly touching reference position on this axle and width, can also comprise correspondingly touching width on this axle and final position.For the d-axis 106 of Fig. 2, in d-axis 106, the corresponding reference position touched in X-axis is q1, and the final position in X-axis is q2, and its width in X-axis is s.The expression-form of the logical data of d-axis 106 can be (q1, q2), and also can be (q1, s), can also be (s, q2), the logical data expression-form of other d-axis be then similar.
The actual scanning process including two stages of this step: namely enter wait the idle phase occurring to touch with when existence touch being detected the stage that touch occurs.
Unlike the prior art, in prior art, wait occur touch idle phase to whole touch area carry out d-axis scanning and from axle scanning, scan exist touch time, then to whole touch area re-start d-axis scanning and from axle scanning to obtain touch location.Technical solution of the present invention is then waiting that the idle phase occurring to touch only carries out d-axis scanning, and just relates to carry out scanning from axle in the stage occurring to touch; Scanning from axle of prior art is waiting that the idle phase occurring to touch has the function detecting and touch and whether exist, and scanning from axle of technical solution of the present invention is waiting that the idle phase occurring to touch then does not exist above-mentioned functions.
Step S101, the d-axis according to the described scanning ray be cut off reduces described scanning area.
Suppose that the touch-screen 100 of Fig. 2 there occurs touch 200 as shown in Figure 3 and touches 300 on touch area 101:
Now, when the d-axis scanning of step S100 (if touch 200 and touch 300 are effectively detected), the scanning area (whole touch area 101) of two dimension respectively there are two pairs of light between radiated element and receiving element to be cut off horizontal and vertical, wherein, laterally longitudinally actual is relative concept, being laterally the X-direction in figure, is longitudinally the Y direction in figure; In figure 3, touch 200 and scanning ray L1, L2, L5, L6 are cut off, touch 300 and scanning ray L3, L4, L7, L8 are cut off (not marking in scanning ray L1 ~ L8 figure).
It should be noted that, the scanning ray be cut off described in the application refers to the scanning ray (being wholly or partly the scanning ray blocked at touch edge) being touched and cutting off wholly or in part, the scan-data that these scanning rays are formed is through removing surround lighting, the data processings such as normalization, generate the touch information logical data representing axle corresponding to scanning ray (d-axis or from axle).
Continue with reference to figure 3, the element that the scanning ray L1 ~ L8 be cut off is corresponding is radiated element a1 and receiving element b1, radiated element a2 and receiving element b2, radiated element a3 and receiving element b3, radiated element a4 and receiving element b4, radiated element a5 and receiving element b5, radiated element a6 and receiving element b6, radiated element a7 and receiving element b7, radiated element a8 and receiving element b8 respectively, and the scanning ray L1 ~ L8 be cut off is corresponding d-axis 108 ~ 115 respectively.
Because radiated element array (102a, 102b) and receiving element array (103a, 103b) to obtain its positional information (also i.e. coordinate figure) to seek in the intrinsic coordinates system XOY of its sequence number or scan address and coordinate metric element in touch-screen microcontroller, by the sequence number of radiated element a1 ~ a8 and receiving element b1 ~ b8 or scan address corresponding with coordinate on intrinsic coordinates system XOY, the expression equation of d-axis 108 ~ 115 on intrinsic coordinates system XOY can be obtained.Certainly, compared to d-axis 106 logical data (with in step S100 to record the d-axis information of the scanning ray be cut off corresponding) this information, described scan-data is belonged to by sequence number or the scan address positional information obtained corresponding to intrinsic coordinates system XOY of radiated element and reception unit, described scan-data is through removing surround lighting, the data processings such as normalization, generate the logical data representing axle (being d-axis) corresponding to scanning ray here.
This step according to described in the d-axis of scanning ray that is cut off to original scanning area (i.e. touch area 101) reduce obtain reduce after scanning area, can be at least one closed region of intersecting gained with the d-axis of the described scanning ray be cut off, each closed region comprises the touch that described at least one, d-axis Scanning Detction arrives.In the present embodiment, the scanning area after reducing intersects by the d-axis of the described scanning ray be cut off the maximum quadrilateral area formed.With reference to figure 3, region sq1 is obviously that d-axis 108 ~ 115 intersects the maximum quadrilateral area obtained, and this maximum quadrilateral area can surround and likely touch, and this is a kind of mode determining the touch area after reducing the most simply.
The acquisition of above-mentioned maximum quadrilateral area is determined by the expression equation of d-axis 108 ~ 115 at intrinsic coordinates system XOY: because the expression equation of d-axis 108 ~ 115 at intrinsic coordinates system XOY presents with form of straight lines on coordinate system, get at the expression equation of intrinsic coordinates system XOY the maximum closed region that these straight lines are formed on intrinsic coordinates system XOY according to d-axis 108 ~ 115, based on d-axis cover the form of scanning area, be in theory this maximum closed region cover scanning area form be quadrilateral area.
Certainly, in other embodiments, this step according to described in the d-axis of scanning ray that is cut off to original scanning area (i.e. touch area 101) reduce obtain reduce after scanning area can also be made up of at least one quadrilateral area further, described quadrilateral area intersects by the d-axis of the described scanning ray be cut off the minimum quadrilateral area formed.This embodiment is actual improves the positional accuracy of the scanning area after determined reducing.With reference to the scanning area schematic diagram that figure 4, Fig. 4 is after touch-screen shown in Fig. 3 detects that another of touch condition is determined and reduces.Region sq2 ~ sq5 is obviously that d-axis 108 ~ 115 intersects the minimum quadrilateral area obtained, and this minimum quadrilateral area also can surround and likely touch also actual specific region sq1 and more adequately locate the position that may touch.
The acquisition of above-mentioned minimum quadrilateral area is also determining at the expression equation of intrinsic coordinates system XOY by d-axis 108 ~ 115, according to d-axis 108 ~ 115 get at the expression equation of intrinsic coordinates system XOY the minimum closed region that intrinsic coordinates system XOY is formed, based on d-axis cover the form of scanning area, be in theory this minimum closed region cover scanning area form be also quadrilateral area.
Certainly, the touch occurred when touch area 101 is non-multiple, but only one touch time, above-mentioned two situations overlap.Should be appreciated that now described maximum quadrilateral area and minimum quadrilateral area all refer to unique closed region of now d-axis formation.
In the technology contents that this step contains, unlike the prior art: in prior art, occur touch stage be still to whole touch area carry out d-axis scanning and from axle scanning, but inventor thinks, now whole touch area is still carried out Scanning Detction as scanning area and be there is no need by prior art; Prior art is waiting that the idle phase occurring to touch only utilizes the scanning of d-axis alternately and detects whether there is touch from axle scanning to touch area, inventor gives d-axis at the present embodiment scans different functions, it also has the positioning function to touching, utilize new positioning function of giving the scanning of idle phase d-axis, can realize to more effective and low consumption the detection of touch in the stage occurring to touch.
Step S102, carries out axle scanning with the position obtaining described touch to the scanning area after reducing.
Described axle scanning comprises d-axis scanning and scans from axle, so-called from axle scanning, carrys out emission scan light exactly, and receive scanning ray by another to the receiving element in radiated element and receiving element by the radiated element in a pair radiated element and receiving element.Equally, it when scanning from axle is depart from certain angle (hereinafter referred to as drift angle with the optical axis of paired radiated element and receiving element from axle that the application also defines, certainly, can think that drift angle is the scanning of 0 ° for d-axis scanning, the value of the drift angle mentioned by the application is more than or equal to 0 °) and the region of touch area scope in order to point to scanning ray experience.
See Fig. 5, describedly axle scanning carried out to the scanning area after reducing comprise with the position obtaining described touch:
Step S120, carries out d-axis scanning to obtain some touches to be screened to the scanning area after described reducing;
Step S121, carries out scanning from axle and utilizing touching from the falseness in the described touch to be screened of result rejecting of axle scanning to determine actual touch to the scanning area after described reducing;
Step S122, exports the position of described actual touch.
This step S120 ~ S122 relates to and carries out the radiated element of axle scanning and the On The Choice of receiving element to the scanning area after reducing.
In step S120, describedly d-axis scanning carried out to the scanning area after described reducing comprise: select successively to connect some with right receiving element and radiated element with the d-axis scanning of the scanning area after reducing described in covering.
The touch-screen 100 entering d-axis scanning is illustrated see Fig. 6, Fig. 6.Radiated element array (102b) for X-direction: select successively to connect radiated element array m1 and with right receiving element, scanning area sq1 after reducing described in the known scanning ray that it produces (illustrate the d-axis of corresponding scanning ray in figure, but do not identify) covers.
But more save power consumption, described some can reduce described in course of emergency with right receiving element and radiated element after the scanning ray of scanning area.In such as Fig. 6, the subset only in picking above-mentioned radiated element array m1: namely receiving element array m2 and with right receiving element be select connect element.
In step S121, describedly carry out comprising from axle scanning to the scanning area after described reducing: select successively to connect the right radiated element of some differences and receiving element with carry out can with set drift angle cover described in reduce after the scanning from axle of scanning area.
The touch-screen 100 entered from axle scanning is illustrated see Fig. 7, Fig. 7.Still for the radiated element array (102b) of X-direction: selection is connected radiated element array m3 and is the different right corresponding receiving element setting drift angle from its optical axis successively, the known scanning ray that it produces (illustrates the d-axis of corresponding scanning ray in figure, but do not identify) cover described in reduce after scanning area sq1, in single pass, setting drift angle is fixed value, be such as the bias angle theta 1 shown in Fig. 7, wherein, line Lo is the optical axis of corresponding radiated element o.Different according to the drift angle of setting from axle scanning each time, it is selected the radiated element array m3 that connects and can be different from its optical axis in the different right corresponding receiving element setting drift angle.
But more saving power consumption, can there is the scanning ray setting the scanning area of drift angle after described reducing in the radiated element that described some differences are right and receiving element.Such as, in Fig. 8, selection is connected radiated element array m4 and is the different right corresponding receiving element setting drift angle from its optical axis successively, the known scanning ray that it produces (illustrate the d-axis of corresponding scanning ray in figure, but do not identify) all with set bias angle theta m cover described in reduce after scanning area sq1.
Certainly, different according to the drift angle of setting from axle scanning each time, it selects the radiated element array connected also can be identical array: as shown in Figure 9, select successively to connect radiated element array m5, scanning in (scanning corresponding different set drift angle from axle each time) from axle each time, the radiated element in radiated element array m5 immobilizes.
Mode of specifically choosing for radiated element array m5 can with reference to as follows:
If radiated element carries out scanning from axle with maximum preset drift angle;
According to the positional information of scanning area sq1 after reducing and the drift angle information from axle, calculate the scanning area sq1 outer edge region after described reducing from axis information;
What use intrinsic coordinates to express described scanning area sq1 outer edge region after reducing with straight-line equation obtains producing this radiated element sequence number from the corresponding scanning ray of axle or scan address information (according to the relevant discussion of the present embodiment from axis information, radiated element and receiving element are to seek obtaining its positional information in the intrinsic coordinates system XOY of its sequence number or scan address and coordinate metric element in touch screen microcontroller, and namely the sequence number of intrinsic coordinates and element or scan address are corresponding relations);
According to obtained radiated element sequence number or scan address information, choose and obtain described radiated element array (m5).
See Fig. 9, known: to suppose that maximum setting drift angle is θ m, the scanning ray (corresponding to axle 601 ~ 605) of the scanning area sq1 outer edge region after known radiated element o1 ~ o4 all can reduce with maximum setting drift angle course of emergency, utilize from axle 601 ~ 605 from axis information and to obtain producing this radiated element from the corresponding scanning ray of axle be radiated element o1 ~ o4, now can determine several radiated element arrays, such as radiated element array [o1, o2] & [o3, o4] (i.e. radiated element array [o1, o2] and upper radiated element array [o3, o4]) or radiated element array [o1, o4] etc., (o1 ~ o4 is only the sequence number or scan address that signal radiated element is corresponding), but in order to avoid causing the interruption scanned due to too much minizone, choose radiated element array [o1, o4], namely radiated element array m5 is advisable.
Further, described in step S120, d-axis scanning is carried out to the scanning area after described reducing and specifically comprises following process to obtain some touches to be screened:
Still for the touch area state of the touch-screen shown in Fig. 3, if during d-axis scanning (if touch 200 and touch 300 are effectively detected), the light between at least two pairs of radiated elements and receiving element is respectively had to be cut off horizontal and vertical respectively, wherein, touch 200 light L1 and light L3 is cut off, touch 300 to be cut off by light L2 and light L4, actual respectively have two pairs of light between radiated element and receiving element to be cut off horizontal and vertical.
Continue with reference to figure 3, touch-screen microcontroller the horizontal and vertical radiated element corresponding to the light obtaining being cut off and receiving element to after be touch at the coordinate figure of transverse direction or the coordinate figure of longitudinal direction by what obtain respectively: i.e. the coordinate figure of radiated element a1 ~ a8, receiving element b1 ~ b8 correspondence intrinsic coordinates system.
The d-axis scanning process of step S120 will there will be the positional information of four possible touches, i.e. described touch to be screened: touch 200, touch 300, touch 400, touch 500, as can be seen from Figure 3: touching 200, touching 300 is actual touch, touching 400, touching 500 is false touches (false touch represents with white circular, and actual touch dark circles represents).
Step S121 touches in order to reject above-mentioned falseness to obtain actual touch:
From the touch-screen 100 in axle scanning process when scanning touch area with the scanning ray of bias angle theta 1, false touch 400,500 can be rejected easily; Can with reference to figure 7, known white circular do not cut off to set bias angle theta 1 from axle scanning ray, can judge that the touch represented by white circular touches as false, touch-screen microprocessor can be rejected this touch intrinsic coordinates record.
After employing is rejected from axle scanning the intrinsic coordinates record that falseness touches, the intrinsic coordinates based on actual touch exports the position obtaining this touch.
The method that corresponding above-mentioned touch detects, the present embodiment also provides a kind of touch detecting apparatus accordingly, comprising:
Scanning element, touches to detect at least one for carrying out d-axis scanning to scanning area;
Record cell, for when detecting that at least one touches, records the d-axis of the scanning ray be cut off;
Area reduction unit, the d-axis for the scanning ray be cut off described in basis reduces described scanning area;
Described scanning element is also for carrying out axle scanning with the position obtaining described touch to the scanning area after reducing, described scanning element comprises described first sub-scanning element.
In the present embodiment, described scanning element may further include;
First sub-scanning element, for carrying out d-axis scanning to obtain some touches to be screened to the scanning area after described reducing;
Second sub-scanning element, touches to determine actual touch from the falseness in the described touch to be screened of result rejecting of axle scanning for carrying out the scanning area after described reducing scanning from axle and utilizing;
Output unit, for exporting the position of described actual touch;
Described first sub-scanning element also touches to detect at least one for carrying out d-axis scanning to scanning area.
Based on the device of above-mentioned touch recognition, the present embodiment also provides a kind of touch-screen accordingly, and this touch-screen comprises touch area and microprocessor, and described microprocessor comprises the touch detecting apparatus of the present embodiment.Embodiment 2
Provide a kind of touch detecting method as shown in Figure 10 in the present embodiment, comprising:
Step S200, consistent with the step S100 of embodiment 1;
Step S201, consistent with the step S101 of embodiment 1;
Step S202, carries out from axle scanning the scanning area after reducing with the position obtaining described touch.
Wherein, in the present embodiment, the axle scanning that step S202 carries out is only limitted to scan from axle.See Figure 11, describedly carry out comprising from axle scanning with the position obtaining described touch to the scanning area after reducing:
Step S220, obtains some touches to be screened according to the result scanned the d-axis of scanning area;
Step S221, carries out scanning from axle and utilizing touching from the falseness in the described touch to be screened of result rejecting of axle scanning to determine actual touch to the scanning area after described reducing;
Step S222, exports the position of described actual touch.
In the present embodiment, as different from Example 1, step S202 is different from step S102, and described some touches to be screened are obtained by the d-axis scanning result of step S200.Because the d-axis scanning result of step S200 relates to the coordinate figure that horizontal and vertical radiated element corresponding to the light be cut off and receiving element fasten at intrinsic coordinates, the detailed process of step S220 can refer step S120, repeats no more herein.
The other technologies content of the present embodiment can the relevant record of reference example 1.
The method that corresponding above-mentioned touch detects, present embodiments provides a kind of touch detecting apparatus, comprising:
Scanning element, touches to detect at least one for carrying out d-axis scanning to scanning area;
Record cell, for when detecting that at least one touches, records the d-axis of the scanning ray be cut off;
Area reduction unit, the d-axis for the scanning ray be cut off described in basis reduces described scanning area;
Described scanning element is also for carrying out axle scanning with the position obtaining described touch to the scanning area after reducing, described scanning element comprises described first sub-scanning element.
In the present embodiment, described scanning element may further include:
First sub-scanning element, touches to detect at least one for carrying out d-axis scanning to scanning area;
Acquiring unit, for obtaining some touches to be screened according to the result scanned the d-axis of scanning area;
Second sub-scanning element, touches to determine actual touch from the falseness in the described touch to be screened of result rejecting of axle scanning for carrying out the scanning area after described reducing scanning from axle and utilizing;
Output unit, for exporting the position of described actual touch.
Based on the device of above-mentioned touch recognition, the present embodiment also provides a kind of touch-screen accordingly, and this touch-screen comprises touch area and microprocessor, and described microprocessor comprises the touch detecting apparatus of the present embodiment.
Although the present invention with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; the Method and Technology content of above-mentioned announcement can be utilized to make possible variation and amendment to technical solution of the present invention; therefore; every content not departing from technical solution of the present invention; the any simple modification done above embodiment according to technical spirit of the present invention, equivalent variations and modification, all belong to the protection domain of technical solution of the present invention.
Claims (16)
1. a touch detecting method, is characterized in that, comprising:
D-axis scanning being carried out to scanning area, when detecting that at least one touches, recording the d-axis of the scanning ray be cut off;
D-axis according to the described scanning ray be cut off reduces described scanning area;
Axle scanning is carried out with the position obtaining described touch to the scanning area after reducing.
2. touch detecting method as claimed in claim 1, is characterized in that, described in the d-axis of scanning ray that is cut off be obtain by recording the corresponding axial location touched.
3. touch detecting method as claimed in claim 2, it is characterized in that, the d-axis that described record is cut off scanning ray comprises that record is corresponding touches that reference position in the axial direction and final position or record are corresponding touches that reference position in the axial direction and width or record are corresponding touches width in the axial direction and final position.
4. touch detecting method as claimed in claim 1, it is characterized in that, described reduce after scanning area comprise at least one closed region of being intersected by the d-axis of the described scanning ray be cut off, each closed region comprises the touch that described at least one, d-axis Scanning Detction arrives.
5. the touch detecting method as described in claim 1 or 4, is characterized in that, described in reduce after scanning area be intersect by the d-axis of the described scanning ray be cut off the maximum quadrilateral area formed.
6. the touch detecting method as described in claim 1 or 4, it is characterized in that, described reduce after scanning area be made up of at least one quadrilateral area, described quadrilateral area intersects by the d-axis of the described scanning ray be cut off the minimum quadrilateral area formed.
7. touch detecting method as claimed in claim 1, is characterized in that, describedly carries out axle scanning to the scanning area after reducing and comprises with the position obtaining described touch:
D-axis scanning is carried out to obtain some touches to be screened to the scanning area after described reducing;
Carry out scanning from axle and utilizing touching from the falseness in the described touch to be screened of result rejecting of axle scanning to determine actual touch to the scanning area after described reducing;
Export the position of described actual touch.
8. touch detecting method as claimed in claim 1, is characterized in that, describedly carries out axle scanning to the scanning area after reducing and comprises with the position obtaining described touch:
Some touches to be screened are obtained according to the result scanned the d-axis of scanning area;
Carry out scanning from axle and utilizing touching from the falseness in the described touch to be screened of result rejecting of axle scanning to determine actual touch to the scanning area after described reducing;
Export the position of described actual touch.
9. touch detecting method as claimed in claim 7, it is characterized in that, describedly d-axis scanning is carried out to the scanning area after described reducing comprise: select successively to connect some with right receiving element and radiated element with the d-axis scanning of the scanning area after reducing described in covering.
10. touch detecting method as claimed in claim 7 or 8, it is characterized in that, describedly carry out comprising from axle scanning to the scanning area after described reducing: select successively to connect the right radiated element of some differences and receiving element with carry out can with set drift angle cover described in the scanning from axle of rear scanning area of reducing.
11. touch detecting methods as claimed in claim 9, is characterized in that, described some can reduce described in course of emergency with right receiving element and radiated element after the scanning ray of scanning area.
12. touch detecting methods as claimed in claim 10, is characterized in that, the scanning ray setting the scanning area of drift angle after described reducing can occur for the radiated element that described some differences are right and receiving element.
13. 1 kinds of touch detecting apparatus, is characterized in that, comprising:
Scanning element, touches to detect at least one for carrying out d-axis scanning to scanning area;
Record cell, for when detecting that at least one touches, records the d-axis of the scanning ray be cut off;
Area reduction unit, the d-axis for the scanning ray be cut off described in basis reduces described scanning area;
Described scanning element is also for carrying out axle scanning with the position obtaining described touch to the scanning area after reducing.
14. touch detecting apparatus as claimed in claim 13, it is characterized in that, described scanning element comprises:
First sub-scanning element, for carrying out d-axis scanning to obtain some touches to be screened to the scanning area after described reducing;
Second sub-scanning element, touches to determine actual touch from the falseness in the described touch to be screened of result rejecting of axle scanning for carrying out the scanning area after described reducing scanning from axle and utilizing;
Output unit, for exporting the position of described actual touch;
Described first sub-scanning element also touches to detect at least one for carrying out d-axis scanning to scanning area.
15. touch detecting apparatus as claimed in claim 13, it is characterized in that, described scanning element comprises:
First sub-scanning element, touches to detect at least one for carrying out d-axis scanning to scanning area;
Acquiring unit, for obtaining some touches to be screened according to the result scanned the d-axis of scanning area;
Second sub-scanning element, touches to determine actual touch from the falseness in the described touch to be screened of result rejecting of axle scanning for carrying out the scanning area after described reducing scanning from axle and utilizing;
Output unit, for exporting the position of described actual touch.
16. 1 kinds of touch-screens, is characterized in that, comprising:
Touch area and microprocessor;
Described microprocessor comprises the touch detecting apparatus as described in any one of claim 13 ~ 15.
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| CN201310217383.3A CN104216572A (en) | 2013-05-31 | 2013-05-31 | Touch screen and touch detection method and device |
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| CN201310217383.3A CN104216572A (en) | 2013-05-31 | 2013-05-31 | Touch screen and touch detection method and device |
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