CN105302380A - Touch point obtaining method, infrared touch device and touch screen equipment - Google Patents
Touch point obtaining method, infrared touch device and touch screen equipment Download PDFInfo
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- CN105302380A CN105302380A CN201510870540.XA CN201510870540A CN105302380A CN 105302380 A CN105302380 A CN 105302380A CN 201510870540 A CN201510870540 A CN 201510870540A CN 105302380 A CN105302380 A CN 105302380A
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Abstract
The invention provides a touch point obtaining method, an infrared touch device and touch screen equipment, and relates to the technical field of touch control. According to the technical scheme, after a candidate touch point is obtained according to a scanned result of the first scanning direction, a scanned result of the second scanning direction is not directly adopted for carrying out removing, instead, whether the candidate touch point is located on optical paths in the second scanning direction is judged firstly, if the candidate touch point is located on the optical paths in the second scanning direction, the scanned result of the second scanning direction is adopted for carrying out removing, if the candidate touch point is not located on the optical paths of the second scanning direction, namely, the touch point is located in a scanning blind zone between the optical paths in the second scanning direction, the candidate touch point is output to be a true point, the situation that because the candidate touch point is located in the scanning blind zone of the second scanning direction, a true touch point is removed is avoided, and the true point obtaining precision is improved.
Description
Technical field
The present invention relates to technical field of touch control, particularly relate to a kind of touch point acquisition methods, infrared touching device and touch-screen equipment.
Background technology
Nowadays, touch display screen has been widely used in the various aspects of social life.Touch display screen only needs user that the icon on finger touching display screen or word just can be realized operation, makes man-machine interaction more simple and direct.According to the principle of work of touch-screen and the medium of transmission information, touch-screen is generally divided into four kinds, is respectively resistance-type, capacitor induction type, infrared-type and surface acoustic wave type.Wherein, infrared touch panel is not by electric current, voltage and electrostatic interference, and suitable severe environmental conditions is the development trend of touch-screen product.
As shown in Figure 1, for existing a kind of infrared touching device structural representation, this infrared touching device comprises display screen and is arranged on the touch frame above display screen, touch frame and comprise first direction limit and second direction limit, first direction limit comprises the first relative smooth transmitting side 11 and the first light-receiving limit, and relative second smooth transmitting side 13 and the second light-receiving limit 14, first smooth transmitting side 11 and the second smooth transmitting side 13 are provided with infrared emission assembly, the first light-receiving limit 12 and the second light-receiving limit 14 are provided with IR receive component.Infrared emission component sends infrared signal and forms light net, when a finger is touching the screen, finger will to block the infrared signal through this position at touch location place, the infrared receiver component of thus corresponding conducting does not receive infrared signal, processor according to this touch point, location place in the position of screen.
Existing infrared touch frame is rectangular, according to being blocked in the first Zheng Sao direction, length limit, direction of scanning, light path is orthogonal obtains candidate touch point to conventional red outside line location algorithm, and adopt the light of the second direction of scanning whether to be blocked to remove terrible point, inventor finds that the true point in candidate touch point also can exist situation about being removed as ghost point by follow up scan direction, and this is the problem that technician faces.
Summary of the invention
Embodiments of the invention provide a kind of touch point acquisition methods, infrared touching device and touch-screen equipment, provide the location that a kind of new touch point method accurately can realize touch point.
The invention provides a kind of touch point acquisition methods, comprise the scanning result according to the first direction of scanning, obtain candidate touch point; Judge whether described candidate touch point is positioned in the light path of the second direction of scanning; If so, then terrible point is removed according to the scanning result of the second direction of scanning; If not, then determine that described candidate touch point is true point.
Present invention also offers a kind of infrared touching device, comprising: display screen and infrared touch frame, also comprise: candidate touch point acquiring unit, for the scanning result according to the first direction of scanning on infrared touch frame, obtain candidate touch point; Matching unit, for judging whether described candidate touch point is positioned at the blind area of the second direction of scanning; Remove terrible unit, for when described candidate touch point is positioned in the light path of the second direction of scanning, remove terrible point according to the scanning result of the second direction of scanning; Output unit, for when described candidate touch point is not positioned in the light path of the second direction of scanning, determines that described candidate touch point is true point.
Present invention also offers a kind of touch-screen equipment, comprise power supply unit, also comprise above-mentioned infrared touching device.
In the inventive solutions, at the scanning result according to the first direction of scanning, after getting candidate touch point, and non-immediate adopts the scanning result of the second direction of scanning to carry out ghost, but first judge in the light path whether candidate touch point is positioned on the second direction of scanning, if candidate touch point is positioned in the light path of the second direction of scanning, the scanning result of the second direction of scanning is adopted to carry out ghost again, if touch point is not positioned in the light path of the second direction of scanning, namely, in scan blind spot between the light path of touch point on the second direction of scanning, then candidate touch point is defined as true point, avoid because candidate touch point be positioned at the second direction of scanning scan blind spot and cause by true touch point remove situation, improve the acquisition precision of true point.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of infrared touching device;
A kind of method flow diagram that Fig. 2 a provides for the embodiment of the present invention;
What Fig. 2 b provided for the embodiment of the present invention has a kind of method flow diagram;
Fig. 3 is the scanning schematic diagram on first direction limit in the first direction of scanning in the embodiment of the present invention;
Fig. 4 is the scanning schematic diagram on second direction limit in the first direction of scanning in the embodiment of the present invention;
Fig. 5 is the schematic diagram of the candidate touch point obtaining the first direction of scanning in the embodiment of the present invention;
Fig. 6 is that in the embodiment of the present invention, candidate touch point is positioned at a schematic diagram in the light path of the second direction of scanning;
Fig. 7 is that in the embodiment of the present invention, candidate touch point is positioned at another schematic diagram in the light path of the second direction of scanning;
Fig. 8 is that in the embodiment of the present invention, candidate touch point is not positioned at a schematic diagram in the light path of the second direction of scanning;
Fig. 9 is that in the embodiment of the present invention, candidate touch point is not positioned at another schematic diagram in the light path of the second direction of scanning;
Figure 10 is the structural representation of infrared touching device in the embodiment of the present invention;
Figure 11 is the structural representation of touch-screen equipment in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Infrared touch frame comprises first direction limit and second direction limit, first direction limit comprises the first smooth transmitting side 11 and the first light-receiving limit 12 be oppositely arranged, second direction limit comprises the second smooth transmitting side 13 and the second light-receiving limit 14 be oppositely arranged, first smooth transmitting side 11 and the second smooth transmitting side 13 are provided with light emission lamp, to launch Infrared, first light-receiving limit 12 and the second light-receiving limit 14 are provided with light-receiving lamp, magnitude of voltage is produced to receive Infrared, the light-receiving lamp that the Infrared that light emission lamp sends can be arranged on its opposite side receives, the light that light emission lamp sends at least can cover a light-receiving lamp on its opposite side.When scanning, for first direction limit: conducting light emission lamp, and conducting is positioned at least one light-receiving lamp of the coverage of light emission lamp, as conducting is the light-receiving lamp of light emission lamp axis, what then it was formed is the light path of 90 °, if conducting is other receiving light, then the direction of scanning of the light path formed, it is the angle on the line that formed of above-mentioned smooth emission lamp and this light-receiving lamp and first direction limit.The determination of the scanning angle on first direction limit usually with first direction limit for reference, those skilled in the art also can select other reference direction.
Direction of scanning comprises second group of parallel light path that first group of parallel light path and second direction limit that first direction limit carries out scanning with the first predetermined angle carry out with the second predetermined angle.Wherein, the first predetermined angle can be identical, also can be different.Common, for convenience of calculating and process, the first predetermined angle often with the second predetermined angle adopts identical value.For example, first direction of scanning can comprise on first direction limit carries out with 90 ° of angles first group of parallel light path scanning, with second group of parallel light path second direction limit being carried out with 90 ° of angles scan, certainly, above-mentioned angle initialization can be other values by those skilled in the art equally, but in the same direction of scanning on limit, same direction, all light paths are the light path be parallel to each other.In the light path be parallel to each other, between adjacent two light paths, scan blind spot can not be called as by the region that optical fiber receive module detects.
Scanning on limit, a direction can adopt man-to-man scanning, that is, conducting light-receiving lamp while conducting light emission lamp, also can adopt the scanning of one-to-many, that is, the two or more light-receiving lamp of conducting while conducting light emission lamp.In this case, the scanning how carrying out light path is not limited, but at least should obtain the scanning result of two or more direction of scanning, to carry out the removal of ghost point.
Embodiments provide a kind of acquisition methods of touch point, be applied to infrared touching device, the infrared touch frame of infrared touching device is provided with first direction limit and second direction limit, can carry out the scanning of multiple direction of scanning in scanning process; As shown in Figure 2, described localization method comprises:
Step S101, scanning result according to the first direction of scanning, obtain candidate touch point.
The above-mentioned scanning result according to the first direction of scanning, obtain candidate touch point to be specially: the magnitude of voltage that S1011 produces on the first direction of scanning according to each light-receiving lamp that first receives limit, determine the position of the first touch area that the light path between the first reception limit and the first transmitting side is blocked, the first transmitting side and first receives limit and is oppositely arranged; The magnitude of voltage that S1012 produces on the first direction of scanning according to each light-receiving lamp that second receives limit, determine the position of the second touch area that the light path between the second reception limit and the second transmitting side is blocked, the second transmitting side and second receives limit and is oppositely arranged; S1013 seeks common ground according to the position of the position of described first touch area and described second touch area, generates candidate touch point.
Concretely, scanning result is, the situation that on this direction of scanning that the magnitude of voltage gone out according to optical fiber receive module determines, whether light path is blocked.According to the light path that the light path that the result determination first direction limit of the first direction of scanning is blocked and second direction limit are blocked; Light path according to the light path that first direction limit is blocked and second direction limit are blocked seeks common ground, and determines candidate touch point.
The scanning result of the first direction of scanning comprises: in the scan period, scanning result on scanning result on first direction limit and second direction limit, it is particularly the magnitude of voltage that the light-receiving lamp on the first light-receiving limit in first direction limit produces, with the magnitude of voltage that the light-receiving lamp on the second light-receiving limit in second direction limit produces, according to the comparison of above-mentioned magnitude of voltage and predetermined threshold value, can know whether light path is blocked, if above-mentioned magnitude of voltage is less than or equal to predetermined threshold value, then the light path of its correspondence is blocked, if above-mentioned magnitude of voltage is greater than predetermined threshold value, the light path of its correspondence is not blocked.This principle is wherein, in a light path, namely, if there is touch point between the light emission lamp that light path is corresponding and light-receiving lamp, then can enter blocking of touch point can be should be at least partially and light-receiving lamp can not be entered in the light of light-receiving lamp, the voltage causing light-receiving lamp to produce reduces, and when voltage reduces to a certain extent, we think that this light path is blocked.If this light path does not exist touch point, then the voltage that in light path, light-receiving lamp produces can not obviously reduce.Therefore say, can by judging that the magnitude of voltage at light-receiving lamp place judges whether light path is blocked.For example, scanning in the first direction of scanning as shown in Figure 3 on first direction limit, scanning in the first direction of scanning as shown in Figure 4 on second direction limit, this exemplary illustration week the first direction of scanning be axial scan, namely, the angle of the direction of scanning in first direction limit and second direction face is 90 °, according to the magnitude of voltage that the first light-receiving limit and the second light reception lamp place, light-receiving limit produce, determine light-receiving lamp and and the light emission lamp of its conducting simultaneously between light path whether be blocked.As shown in Figure 5, the magnitude of voltage that light-receiving lamp 141 and light-receiving lamp 121 place produce is less than predetermined threshold value, due to light emission lamp 111 and light-receiving lamp 121 conducting simultaneously, light emission lamp 131 and light-receiving lamp 141 conducting simultaneously, therefore, light path 401 between light emission lamp 111 and light-receiving lamp 121 is blocked, and the light path 402 between light emission lamp 131 and light-receiving lamp 141 is blocked.Know-why is wherein, when light is in the optical path subject to blocking, the light minimizing that light-receiving lamp receives does not receive light even completely, so the magnitude of voltage that optical fiber receive module goes out to produce can reduce, even become 0, therefore can draw, when the voltage that the light-receiving lamp in light path produces is less than predetermined threshold, light path is blocked.The light beam received due to light-receiving lamp has one fixed width, therefore the amount that reduces of magnitude of voltage and light are dredged the width be blocked and are proportionate, when light beam has been blocked predetermined width, the magnitude of voltage that light-receiving lamp goes out to produce has been less than predetermined threshold value, now thinks that light path is blocked.
Further, in infrared scan, the region that the light path be blocked continuously encloses is defined as touch area, and on different directions limit, the common factor of touch area can be used for asking candidate touch point, and touch area can also be used to judge the true and false of touch point.Asking in the process of touch point according to touch area, Article 1 light path in the light path be blocked continuously is called as initial optical path, if be N, N is more than or equal to 2, then the initial optical path of touch area is defined as N-1, the last item light path of the light path that is blocked continuously is called as termination light path, if termination light path is M, M is less than the maximum optical path number on this limit, direction, then the termination light path of touch area is defined as M+1.By the situation that such expansion can avoid touch point existing in the scan blind spot adjacent with original touch region not to be scanned, improve scanning accuracy.
Therefore say, in S1011 step, determine that the position of the first touch area that the light path between the first reception limit and the first transmitting side is blocked is specially: if the Article 1 light path in the light path be blocked continuously is M article of light path, the last item light path is N article of light path, wherein, 1<M≤N<MAX1, MAX1 are the maximum optical path number between the first reception limit and the first transmitting side; Using M-1 article of light path as the beginning boundary of the first touch area, using N+1 article of light path as the termination border of the first touch area, to export described first touch area.In S1012 step, determine that the position of the second touch area that the light path between the second reception limit and the second transmitting side is blocked is specially: if the Article 1 light path in the light path be blocked continuously is I article of light path, the last item light path is J article of light path, wherein, 1<I≤J<MAX2, MAX2 are the maximum optical path number between the second reception limit and the second transmitting side; Using I-1 article of light path as the beginning boundary of the second touch area, using J+1 article of light path as the termination border of the second touch area, to export described second touch area.
Be provided with a reference frame because each touches frame inside, in this reference frame, each light emission lamp and each light-receiving lamp all have oneself fixing position, and the position of light path can be determined according to the position of light emission lamp and light-receiving lamp.After the position determining the light path be blocked, seeking common ground of the light path be blocked on first direction limit and the light path be blocked on second direction limit, can determine candidate touch point.
Because light emission lamp and light-receiving lamp all have certain size, in manufacturing process, between light-receiving lamp and between light emission lamp, have certain gap exist simultaneously, therefore the region that there is one fixed width between light path and light path can be caused, be called to more obtain candidate touch point, prevent the contact of the scan blind spot being positioned at the first direction of scanning not existing by method, magnitude of voltage assignment can be carried out to the position of scan blind spot at this, make it in follow-up processing procedure, be considered to the light path be blocked.Namely think that scan blind spot goes out existence one virtual optical path, the magnitude of voltage that in its light path, optical fiber receive module produces is less than predetermined threshold value, therefore there is true touch point in scan blind spot.
Therefore, it is the scan blind spot assignment between the first reception limit and the first transmitting side, and according to the magnitude of voltage that first each light-receiving lamp receiving limit produces on the first direction of scanning, determine the position of the first touch area that the light path between the first reception limit and the first transmitting side is blocked, wherein, described first transmitting side and described first receives limit and is oppositely arranged, and described scan blind spot is the region between adjacent optical path; It is the scan blind spot assignment between the second reception limit and the second transmitting side, and according to the magnitude of voltage that second each light-receiving lamp receiving limit produces on the first direction of scanning, determine the position of the second touch area that the light path between the second reception limit and the second transmitting side is blocked, wherein, described second transmitting side and described second receives limit and is oppositely arranged; Seek common ground according to the position of described first touch area and the position of described second touch area, generate candidate touch point.
A lot of candidate touch point can be increased like this, but can ensure that the touch point being positioned at blind area also can be acquired, change the time if do not got in the first direction of scanning, because the processing procedure in follow up scan direction is for going terrible process, therefore new candidate touch point can not be increased, so the point of touch blind area can will be positioned to omitting.The ghost point of many acquisitions can be removed in the judgement in follow up scan direction, is conducive to obtaining more true point.
Step S102, judge whether candidate touch point is positioned in the light path of the second direction of scanning.
Light path has certain width, generally, the position of light path can according to the position of light emission lamp and light-receiving lamp, and predetermined width is determined, light-receiving lamp can be entered into during light namely within predetermined width, have no idea to enter in the light-receiving lamp of light path during the light of the part in the light that this light path sends outside light path, because the same direction of scanning in limit, same direction is one group of parallel light path, because light emission lamp and light-receiving lamp are independently optical lamp optical assembly respectively, therefore certain gap can be there is, this can cause organizing at this scan blind spot producing one fixed width between parallel light path.
After getting above-mentioned candidate touch point, the position of touch point can be obtained, according to the position of light path each in the second direction of scanning, can judge whether candidate touch point is positioned in the light path of the second direction of scanning simultaneously.The different light path comprised with the first direction of scanning of the light path comprised in second direction of scanning, namely in the second direction of scanning, the angle of light path is different from the light path of the first direction of scanning.
For example, can adopt that algorithm is counter to be pushed away, as shown in Figure 6 and Figure 7, the solid line of band arrow represents the position of light path, and the dotted line of solid line both sides states the width of light beam of this light path.The determination of touch point can be adopt the common factor of light path to obtain a coordinate points, and gives certain radius to this coordinate points, obtains candidate contact; Also the common factor of light beam can be adopted to obtain a region as a candidate touch point; Equally also can adopt other schemes well known to those skilled in the art, the present invention is not limited at this, and for Fig. 6, the candidate touch point of candidate touch point for obtaining in Fig. 5, its center is x=a, y=b, and radius is r.Therefore by calculating the position can knowing border, candidate touch point.When judging whether candidate touch point is positioned at the scan blind spot of the second direction of scanning, can judge whether above-mentioned candidate touch point 201 is positioned in the light path of the second direction of scanning, if not, is then positioned at the scan blind spot of the second direction of scanning, if so, be then positioned in the light path of the second direction of scanning.In above-mentioned deterministic process, light path can adopt the position of a line, the position of the solid line namely with arrow in Fig. 6, also can adopt the mode of light-beam position calculating light path, i.e. the region represented by dotted line of solid line both sides in Fig. 7.
Step S103, if so, then remove terrible point according to the scanning result of the second direction of scanning; If not, then, determine that described candidate touch point is true point.
Situation as shown in Figure 6 and Figure 7, namely candidate touch point is positioned at the situation in the light path of the second direction of scanning, now comprises: S1031 according to the scanning result removal ghost point of the second direction of scanning and judges whether the light path of the second direction of scanning is blocked by described candidate touch point; If S1032 blocks, then determine that described candidate touch point is true point, if do not block, then determine that described candidate touch point is terrible point.
Exemplary, judge whether light path 403 is blocked according to the magnitude of voltage at light-receiving lamp 122 place, light path 403 is blocked, then determine that candidate touch point is really put and export, if be not blocked, judge that candidate touch point is as terrible point, and do not pay attention in follow-up judgement week, to reduce the calculated amount of whole computation process.Before determining that candidate touch point is true point, a determining step S1033 can also be comprised, judge whether to there is untreated direction of scanning, and substitute the second direction of scanning with new direction of scanning, if exist, then according to step 102, new direction of scanning is processed, if do not exist, then determine that candidate touch point is true point, and export.
Situation as shown in Figure 8 and Figure 9, the scanning ray namely on the second direction of scanning, all without candidate touch point, can be adopt light path to judge, also can be adopt light-beam position to judge.If the scanning ray on the second direction of scanning is all without candidate touch point, then determine that candidate touch point is true point.Further, before determining that candidate touch point is true point, a determining step S1033 can also be comprised, judge whether to there is untreated direction of scanning, if exist, then according to step 102, new direction of scanning is processed, and substitute the second direction of scanning with new direction of scanning, if do not exist, then determine that candidate touch point is true point, and export.
Present invention also offers a kind of infrared touching device, comprising: display screen, infrared touch frame, candidate touch point acquisition module, matching primitives module, output unit,
Infrared touch frame, for performing infrared scan, concrete.
Candidate touch point acquisition module is used for, and according to the scanning result of the first direction of scanning on infrared touch frame, obtains candidate touch point.
Candidate touch point acquisition module is according to the scanning result of the first direction of scanning, obtain candidate touch point detailed process for the magnitude of voltage that produces on the first direction of scanning according to first each light-receiving lamp receiving limit, determine the position of the first touch area that the light path between the first reception limit and the first transmitting side is blocked, the first transmitting side and first receives limit and is oppositely arranged; According to the magnitude of voltage that second each light-receiving lamp receiving limit produces on the first direction of scanning, determine the position of the second touch area that the light path between the second reception limit and the second transmitting side is blocked, the second transmitting side and second receives limit and is oppositely arranged; Seek common ground according to the position of described first touch area and the position of described second touch area, generate candidate touch point.
Further, obtain in the process of candidate touch point at candidate touch point acquisition module, determine that the position of the first touch area that the light path between the first reception limit and the first transmitting side is blocked is specially: if the Article 1 light path in the light path be blocked continuously is M article of light path, the last item light path is N article of light path, wherein, 1<M≤N<MAX1, MAX1 are the maximum optical path number between the first reception limit and the first transmitting side; Using M-1 article of light path as the beginning boundary of the first touch area, using N+1 article of light path as the termination border of the first touch area, to export described first touch area.Determine that the position of the second touch area that the light path between the second reception limit and the second transmitting side is blocked is specially: if the Article 1 light path in the light path be blocked continuously is I article of light path, the last item light path is J article of light path, wherein, 1<I≤J<MAX2, MAX2 are the maximum optical path number between the second reception limit and the second transmitting side; Using I-1 article of light path as the beginning boundary of the second touch area, using J+1 article of light path as the termination border of the second touch area, to export described second touch area.
Further, candidate point acquisition module can also be the scan blind spot assignment between the first reception limit and the first transmitting side, and according to the magnitude of voltage that first each light-receiving lamp receiving limit produces on the first direction of scanning, determine the position of the first touch area that the light path between the first reception limit and the first transmitting side is blocked, wherein, described first transmitting side and described first receives limit and is oppositely arranged, and described scan blind spot is the region between adjacent optical path; It is the scan blind spot assignment between the second reception limit and the second transmitting side, and according to the magnitude of voltage that second each light-receiving lamp receiving limit produces on the first direction of scanning, determine the position of the second touch area that the light path between the second reception limit and the second transmitting side is blocked, wherein, described second transmitting side and described second receives limit and is oppositely arranged; Seek common ground according to the position of described first touch area and the position of described second touch area, generate candidate touch point.
The coordinate of candidate touch point, after getting candidate touch point, is sent to matching module by candidate touch point acquisition module,
Matching module is used for, and judges whether candidate touch point is positioned in the light path of the second direction of scanning.
Matching module, after the coordinate receiving above-mentioned candidate touch point, according to the position of light path each in the second direction of scanning, can judge whether candidate touch point is arranged in the light path of the second direction of scanning.The different light path comprised with the first direction of scanning of the light path comprised in second direction of scanning, namely in the second direction of scanning, the angle of light path is different from the light path of the first direction of scanning.
For example, can adopt that algorithm is counter to be pushed away, as shown in Figure 6 and Figure 7, the solid line of band arrow represents the position of light path, and the dotted line of solid line both sides states the width of light beam of this light path.The determination of touch point can be adopt the common factor of light path to obtain a coordinate points, and gives certain radius to this coordinate points, obtains candidate contact; Also the common factor of light beam can be adopted to obtain a region as a candidate touch point; Equally also can adopt other schemes well known to those skilled in the art, the present invention is not limited at this, and for Fig. 6, the candidate touch point of candidate touch point for obtaining in Fig. 5, its center is x=a, y=b, and radius is r.Therefore by calculating the position can knowing border, candidate touch point.When judging whether candidate touch point is positioned at the scan blind spot of the second direction of scanning, can judge whether above-mentioned candidate touch point 201 is positioned in the light path of the second direction of scanning, if not, is then positioned at the scan blind spot of the second direction of scanning, if so, be then positioned in the light path of the second direction of scanning.In above-mentioned deterministic process, light path can adopt the position of a line, the position of the solid line namely with arrow in Fig. 6, also can adopt and calculate the mode of light-beam position, i.e. the region represented by dotted line of solid line both sides in Fig. 7.
Remove terrible unit, in the light path that candidate touch point is positioned at the second direction of scanning time, remove terrible point according to the scanning result of the second direction of scanning.
Go terrible unit go ghost operation can for judge whether the light path of the second direction of scanning is blocked by described candidate touch point; If block, then export the first identifying information value output unit, if do not block, then determine that described candidate touch point is terrible point.Wherein for making output unit determine, the candidate touch point corresponding with the first identifying information is true point to the first identifying information.Certainly, those skilled in the art can also adopt other terrible scheme of going to carry out ghost, and the present embodiment does not limit at this.
Output unit, for when described candidate touch point is not positioned in the light path of the second direction of scanning, determines that candidate touch point is true point.
Output unit also for, receive terrible unit export the first identifying information after, determine that this candidate touch point is true point, and export.
Further, before determining that candidate touch point is true point, a deterministic process can also be comprised, sentence output unit and judge whether to there is untreated direction of scanning, if exist, then according to step 102, new direction of scanning is processed, and substitute the second direction of scanning with new direction of scanning, if do not exist, then determine that candidate touch point is true point.
Additionally provided a kind of touch-screen equipment by invention, comprise power supply unit and any one infrared touching device above-mentioned.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (10)
1. a touch point acquisition methods, is characterized in that,
According to the scanning result of the first direction of scanning, obtain candidate touch point;
Judge whether described candidate touch point is positioned in the light path of the second direction of scanning;
If so, then terrible point is removed according to the scanning result of the second direction of scanning; If not, then determine that described candidate touch point is true point.
2. method as claimed in claim 1, is characterized in that,
Described, remove ghost point according to the scanning result of the second direction of scanning and comprise:
Judge whether the light path of the second direction of scanning is blocked by described candidate touch point;
If block, then determine that described candidate touch point is true point, if do not block, then determine that described candidate touch point is terrible point.
3. method as claimed in claim 1, is characterized in that,
Describedly judge whether described candidate touch point is positioned in the light path of the second direction of scanning, comprises
According to the position of each light path in the coordinate of described candidate touch point and described second direction of scanning, judge whether described candidate touch point is positioned in the light path of the second direction of scanning.
4. method as described in claim 1-3 any one, is characterized in that,
Describedly determine that described candidate touch point is true point, be specially:
Determine whether there is untreated direction of scanning;
If exist, then judge whether described candidate touch point is positioned in the light path of described untreated direction of scanning, if do not exist, then determine that described candidate touch point is true point.
5. method as claimed in claim 4, is characterized in that,
The described scanning result according to the first direction of scanning, obtains candidate touch point and is specially:
According to the magnitude of voltage that first each light-receiving lamp receiving limit produces on the first direction of scanning, determine the position of the first touch area that the light path between the first reception limit and the first transmitting side is blocked, described first transmitting side and described first receives limit and is oppositely arranged;
According to the magnitude of voltage that second each light-receiving lamp receiving limit produces on the first direction of scanning, determine the position of the second touch area that the light path between the second reception limit and the second transmitting side is blocked, described second transmitting side and described second receives limit and is oppositely arranged;
Seek common ground according to the position of described first touch area and the position of described second touch area, generate candidate touch point.
6. method as claimed in claim 5, is characterized in that,
Describedly determine that the position of the first touch area that the light path between the first reception limit and the first transmitting side is blocked is specially:
If the Article 1 light path in the light path be blocked continuously is M article of light path, the last item light path is N article of light path, and wherein, 1<M≤N<MAX1, MAX1 are the maximum optical path number between the first reception limit and the first transmitting side;
Using M-1 article of light path as the beginning boundary of the first touch area, using N+1 article of light path as the termination border of the first touch area, to export described first touch area;
Describedly determine that the position of the second touch area that the light path between the second reception limit and the second transmitting side is blocked is specially:
If the Article 1 light path in the light path be blocked continuously is I article of light path, the last item light path is J article of light path, and wherein, 1<I≤J<MAX2, MAX2 are the maximum optical path number between the second reception limit and the second transmitting side;
Using I-1 article of light path as the beginning boundary of the second touch area, using J+1 article of light path as the termination border of the second touch area, to export described second touch area.
7. method as claimed in claim 5, is characterized in that,
The scanning result of described first direction of scanning, obtains candidate touch point, comprising:
It is the scan blind spot assignment between the first reception limit and the first transmitting side, and according to the magnitude of voltage that first each light-receiving lamp receiving limit produces on the first direction of scanning, determine the position of the first touch area that the light path between the first reception limit and the first transmitting side is blocked, wherein, described first transmitting side and described first receives limit and is oppositely arranged, and described scan blind spot is the region between adjacent optical path;
It is the scan blind spot assignment between the second reception limit and the second transmitting side, and according to the magnitude of voltage that second each light-receiving lamp receiving limit produces on the first direction of scanning, determine the position of the second touch area that the light path between the second reception limit and the second transmitting side is blocked, wherein, described second transmitting side and described second receives limit and is oppositely arranged;
Seek common ground according to the position of described first touch area and the position of described second touch area, generate candidate touch point.
8. an infrared touching device, comprising: display screen and infrared touch frame, is characterized in that, also comprise:
Candidate touch point acquiring unit, for the scanning result according to the first direction of scanning on infrared touch frame, obtains candidate touch point;
Matching unit, for judging whether described candidate touch point is positioned at the blind area of the second direction of scanning;
Remove terrible unit, when described candidate touch point is positioned in the light path of the second direction of scanning, remove terrible point according to the scanning result of the second direction of scanning;
Output unit, for when described candidate touch point is not positioned in the light path of the second direction of scanning, determines that described candidate touch point is true point.
9. infrared touching device as claimed in claim 8, is characterized in that,
The described scanning result according to the second direction of scanning is removed ghost point and is specially:
The light path of terrible unit judges second direction of scanning is gone whether to be blocked by described candidate touch point;
If block, then send the first identifying information to described output unit, exporting described candidate touch point to make described output unit is true point, if do not block, then determines that described candidate touch point is terrible point;
Described output unit also for, receive the first identifying information, and determine that described candidate touch point is true point.
10. a touch-screen equipment, comprises power supply unit, it is characterized in that,
Also comprise the infrared touching device as described in claim 8 or 9 any one.
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