CN104978081A - Method for determining touch position of touch control screen and touch control device - Google Patents
Method for determining touch position of touch control screen and touch control device Download PDFInfo
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Abstract
The invention discloses a method for determining a touch position of a touch control screen and a touch control device. The method comprises the steps: setting positions of a first sensor and a second sensor according to a predetermined rule, including respectively detecting information of distances from the first sensor to a touch point and from the second sensor to the touch point, wherein the touch point is predetermined in a touch region; and determining position information of the touch point according to the distance information and the position information of the first sensor and the second sensor. According to the method, the cost of the touch device is lowered and the structure of the touch device is simplified.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of method and contactor control device of touch-screen determination position of touch.
Background technology
In prior art, infrared touch panel is normally at surrounding arrangement power valve and the receiving tube of screen, and power valve and receiving tube one_to_one corresponding, form the infrared array anyhow intersected.When user is with finger point touching screen, two infrared rays anyhow through this position can be blocked at touch point place, thus can judge the position of touch point on screen.But by screen surrounding arrangement power valve and receiving tube, realize touch detect method, there is the defects such as cost is high, complex structure.
Therefore, how reducing the cost of contactor control device, simplify its structure, is those skilled in the art's technical issues that need to address.
Summary of the invention
The object of this invention is to provide a kind of method of touch-screen determination position of touch, the method can reduce the cost of contactor control device, simplifies the structure of contactor control device.Another object of the present invention is to provide a kind of contactor control device.
For solving the problems of the technologies described above, the invention provides a kind of method of touch-screen determination position of touch, setting the position of first sensor and the second sensor according to pre-defined rule, determining the positional information of described first sensor and described second sensor, comprising:
Detect the range information of described first sensor and described second sensor and touch point respectively; Wherein, described touch point is in the touch area preset;
According to the positional information of described range information and described first sensor and described second sensor, determine the positional information of described touch point.
Wherein, the described position according to pre-defined rule setting first sensor and the second sensor comprises:
Described first sensor is equal to the distance of place, described touch area plane with described second sensor.
Wherein, the method for the touch area preset described in comprises:
Described first sensor is utilized to determine the first effective coverage;
Described second sensor is utilized to determine the second effective coverage;
The public domain choosing described first effective coverage and described second effective coverage is effective surveyed area;
Described touch area is set in described effective surveyed area.
Wherein, in described effective surveyed area, set described touch area to comprise:
Rectangular touch region is set in described effective surveyed area; Or, in described effective surveyed area, set circular touch region; Or, in described effective surveyed area, set square touch region.
Wherein, in described effective surveyed area, set described touch area to comprise:
Described touch area is symmetrical arranged along the projection line of perpendicular bisector on described touch area of described first sensor and described second sensor line.
Wherein, the described range information detecting described first sensor and described second sensor and touch point respectively comprises:
The range information of described first sensor and described second sensor touch point described in cycle detection and described first sensor and described second sensor in turn.
The invention provides a kind of contactor control device, comprising:
First sensor, for detecting the first range information of described first sensor and described touch point;
Second sensor, for detecting the second distance information of described second sensor and described touch point; Wherein, described touch point is in the touch area preset;
Positional information determination module, for according to described first range information and described second distance information, and the positional information of described first sensor and described second sensor, determine the positional information of described touch point.
Wherein, described first sensor and described second sensor are specially: infrared sensor or ultrasonic sensor.
Wherein, described touch area is specially: square touch region, or rectangular touch region, or circular touch region.
Wherein, described touch area is symmetrical arranged along the projection line of perpendicular bisector on described touch area of described first sensor and described second sensor line.
The method of a kind of touch-screen determination position of touch provided by the present invention and contactor control device, by detecting the range information of described first sensor and described second sensor and touch point respectively; Wherein, described touch point is in the touch area preset; According to the positional information of described range information and described first sensor and described second sensor, determine the positional information of described touch point; The method reduces the cost of contactor control device, simplifies the structure of contactor control device.And there is changeability due to the position of touch area and shape, be therefore convenient to the adaptability increasing contactor control device, strengthen Consumer's Experience.
Accompanying drawing explanation
In order to the technical scheme of the clearer explanation embodiment of the present invention or 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.
The process flow diagram of the method for the determination position of touch that Fig. 1 provides for the embodiment of the present invention;
The schematic diagram of two sensing stations that Fig. 2 provides for the embodiment of the present invention;
The structured flowchart of the contactor control device that Fig. 3 provides for the embodiment of the present invention.
Embodiment
Core of the present invention is to provide a kind of method of touch-screen determination position of touch, and the method can reduce the cost of contactor control device, simplifies the structure of contactor control device.Another object of the present invention is to provide a kind of contactor control device.
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is 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.
Please refer to Fig. 1, the process flow diagram of the method for the touch-screen determination position of touch that Fig. 1 provides for the embodiment of the present invention; The method can comprise:
Step s100, detect the range information of described first sensor and described second sensor and touch point respectively; Wherein, described touch point is in the touch area preset;
Wherein, the present embodiment only needs by adopting two sensors to detect the positional information of touch point.But the number of the present invention's not limit sensor, just adopt two sensors precisely can detect the positional information of touch point in the present embodiment, also farthest can reduce cost and the complexity thereof of touch screen, be preferred version of the present invention.
Wherein, preferably, the sensor in the present invention can be infrared sensor, ultrasonic sensor or laser sensor etc.As long as it can complete distance measurement function here.
Wherein, concrete, the situation only needing two sensors just can complete accurately touch point position, location, needs the position according to pre-defined rule setting first sensor and the second sensor and determines the positional information of described first sensor and described second sensor; Preferably, the described position according to pre-defined rule setting first sensor and the second sensor comprises:
Described first sensor is equal to the distance of place, described touch area plane with described second sensor.And the surface of place, a touch area plane demand fulfillment touch area is plane or almost plane.
Please refer to Fig. 2, the schematic diagram of two sensing stations that Fig. 2 provides for the embodiment of the present invention; Here infrared sensor selected by sensor, then infrared receiving/transmission pipe one (i.e. first sensor) is 101, and infrared receiving/transmission pipe two (i.e. the second sensor) is 102, and touch area CDEF is 103.Wherein, the infrared receiving/transmission pipe 1 and the infrared receiving/transmission pipe 2 102 that indicate in figure are positioned on same level line, the A indicated in figure is the central point of infrared receiving/transmission pipe 1, B is the central point of infrared receiving/transmission pipe 2 102, indicate in figure O point be the central point of AB, AB is the centre distance of two infrared receiving/transmission pipes, is a fixing given value; G, H of indicating in figure are respectively the central point of Liang Tiao limit, touch area CF and DE; The OXY coordinate system indicated in figure is with the central point O of AB for initial point, take AB as Y-axis, using the OH perpendicular to AB as X-axis.P point in figure is any touch point in touch area 103.The α angle indicated in figure is effective transmitting and receiving range of infrared receiving/transmission pipe; AM, BN of indicating in figure are all parallel to X-axis.D1 and d2 indicated in figure is respectively minimum distance and the maximum distance of touch area frontier distance infrared sensor, is known set value.The h indicated in figure is the height of touch area, is a known set value.In figure, PO ＇ is a boost line, and PO ＇ and AB is vertically intersected on O ＇ point.
Wherein, Railway Project is had to should be noted that: first: OXY coordinate system is easier coordinate system, but the application does not limit the selected mode of coordinate system, the OXY coordinate system just provided in Fig. 2 is because have selected specific position, therefore more convenient in meetings such as computation processes, the Computing Principle of certain other coordinate system of selection is all the same, only needs the coordinate computing formula obtained according to Fig. 2 to carry out shifting onto.
When adopting OXY coordinate system, the D point in touch area 103 is distance infrared receiving/transmission pipe 1 central point A point farthest, and distance is AD; E point in touch area 103 is distance infrared receiving/transmission pipe 2 102 central point B point farthest, and distance is BE; Because AB and touch area CDEF is all with OX axle for axis of symmetry is arranged symmetrically with, so distance AD=BE.
Wherein, the h indicated in Fig. 2 is the height of touch area, d1 and d2 indicated in Fig. 2 is respectively minimum distance and the maximum distance of touch area frontier distance infrared sensor, and h, d1 and d2 are known set value.In Δ AMD shape or in Δ BNE, following formula (1) can be obtained according to Pythagorean theorem.So the maximum measure distance distance of the infrared receiving/transmission pipe 1 selected in this method and infrared receiving/transmission pipe 2 102 is designated as Dmax must be more than or equal to the distance that formula (1) tries to achieve, can meet the demands.
In formula, d2, h and AB are given value.
Second: the determination mode of touch area 103, it can carry out according to multiple situation, wherein, fast and easy accurately a kind of mode for: described in the touch area that presets comprise:
Described first sensor is utilized to determine the first effective coverage;
Described second sensor is utilized to determine the second effective coverage;
The public domain choosing described first effective coverage and described second effective coverage is effective surveyed area;
Described touch area is set in described effective surveyed area.
Wherein, the infrared components of described infrared receiving/transmission pipe 1, the same model of infrared receiving/transmission pipe 2 102, the ultrared angular range of its launch and accept is ± α angle, and its most I range finding distance is designated as Dmin, and Dmin is less than d1, maximum measure distance distance is designated as Dmax.Because the angle of divergence of infrared receiving/transmission pipe is larger, cost is higher, also easier false triggering.So the ultrared angular range of launch and accept of this device preferred infrared receiving/transmission pipe is ± α angle, and α <30 °, can effectively reduce costs.In addition, adopt infrared components range finding, due to the light velocity quickly, usually have range hole, so the layout distance of infrared receiving/transmission pipe and Touch Zone is greater than blind area distance by this method, can realize locating the non-blind area of touch point in touch area.
Wherein, in effective surveyed area, the described touch area of setting can be arbitrary shape, the optional position of touch area can be positioned at, but in order to convenience of calculation, convenient with actual fabrication finished product contactor control device, preferably, symmetric figure centered by the surface setting described touch area in described effective surveyed area, preferably, in described effective surveyed area, set described touch area to comprise: in described effective surveyed area, set rectangular touch region; Or, in described effective surveyed area, set circular touch region; Or, in described effective surveyed area, set square touch region.The time rectangular touch region provided in Fig. 2.
Preferably, in described effective surveyed area, set described touch area to comprise:
Described touch area is symmetrical arranged along the projection line of perpendicular bisector on described touch area of described first sensor and described second sensor line.This is also in order to convenient, quick when adopting OXY coordinate system, simplifies and calculates.
3rd: the infrared components of described infrared receiving/transmission pipe 1, the same model of infrared receiving/transmission pipe 2 102, infrared receiving/transmission pipe 101 and 102 is a kind of infrared integrated circuit components, and each infrared receiving/transmission pipe comprises an infrared LED and an infrared receiver sensor; This method can send according to infrared receiving/transmission pipe and receive the mistiming of infrared light, automatically calculates the distance of obstacle distance infrared receiving/transmission tube hub point.
4th: infrared receiving/transmission pipe 1 and infrared receiving/transmission pipe 2 102 are arranged in same level, and the height General Requirements of this surface level is higher than the plane 3mm to 10mm at place, touch area; So, the central point O of AB, mid point G and H on the limit parallel with two of touch area CDEF, is be positioned at same plane, instead of is located along the same line; Because the plane at infrared receiving/transmission tube hub point AB place is just a little more than the plane at place, touch area, can ignores, so in order to following description and convenience of calculation, suppose that AB and touch area CDEF is positioned at same level.
Step s110, positional information according to described range information and described first sensor and described second sensor, determine the positional information of described touch point.
Wherein, preferably, the described range information detecting described first sensor and described second sensor and touch point respectively comprises:
The range information of described first sensor and described second sensor touch point described in cycle detection and described first sensor and described second sensor in turn.
With reference to figure 2, be described below in detail and determine that the detection method principle of position of touch is as follows:
This method is sent by the circulation of wheel current control infrared receiving/transmission pipe 101 and 102, receiving infrared-ray, to detect the distance of barrier in real time.When having touch control operation in touch area CDEF polygon shown in fig. 2, suppose that touch point is number in the figure P place, then namely this method can detect that the barrier at P place, touch point is respectively apart from the distance of infrared receiving/transmission pipe 101 and 102, is designated as AP and BP respectively in real time.Detecting that this method determines the position of touch point P according to following steps by after having touch control operation in the CDEF of polygon touch area.
This method both can probably judge by the value comparing AP and BP that touch point P was positioned at top or the bottom of touch area 103, also can by calculating the accurate coordinates of touch point P accurately.
The size of the value of AP and BP that can directly utilize sensor to obtain when environment for use is substantially upper portion or the bottom only needing to distinguish touch area directly obtains the position of P point, when environment for use be need carry out the coordinate accurately calculating touch point P when, the computing formula that can be obtained by this method is directly calculated.
The first: the specific embodiment by means of only Fig. 2 is described; First according to detect and obstacle distance AP and BP calculated judges, this touch point is positioned at quadrilateral GHEF above OX axle, is positioned on OX axle or is positioned at the quadrilateral GHDC below OX axle; Shown in figure 2, in figure, PO ＇ is a boost line, and PO ＇ is vertically intersected on O ＇ point with AB; So according to Pythagorean theorem in right-angle triangle AO ＇ P and right-angle triangle BO ＇ P:
As quadrilateral GHEF above touch point P is positioned at OX axle, due to O ＇ B>O ＇ A, so composite type (2) and formula (3) can obtain AP<BP;
When touch point P is positioned on OX axle, due to O ＇ B=O ＇ A, so composite type (2) and formula (3) can obtain AP=BP;
When touch point P is positioned at the quadrilateral GHDC below OX axle, due to O ＇ B<O ＇ A, so composite type (2) and formula (3) can obtain AP>BP.
So this device is first-selected can according to detect and obstacle distance AP and BP calculated judges the fuzzy ranges of current touch point P; As AP<BP, then judge that P point is the quadrilateral GHEF be positioned at above OX axle; As AP=BP, then judge that P point is positioned on OX axle; As AP<BP, then judge that P point is the quadrilateral GHDC be positioned at below OX axle.
The second: the coordinate (P of current touch point P in OXY coordinate system can be calculated
x, P
y).
Concrete steps are as follows:
According to above description, AP and BP is that this device detects the barrier of touch point at P place in real time respectively apart from the distance of infrared receiving/transmission pipe 101 and 102, is given value; Again because position A and B of infrared receiving/transmission pipe 1 infrared receiving/transmission pipe 3 102 is fixing known, so in Δ ABP, length of side AB, AP and BP are known terms.
So, in Δ ABP triangle, calculate the sine of ∠ ABP according to remaining profound theorem, cosine result be respectively following formula (4) and (5):
In right angle Δ BPO ＇, O ＇ P can be tried to achieve and O ＇ B result is following formula (6) and (7):
To be easy to get relational expression (8) with reference to figure 2;
O'O＝O'B-AB----------------------------(8)
Be can be calculated by formula (7) and (8):
Suppose that the coordinate of touch point P in OXY coordinate system represents with Px and Py,
The coordinate (PX, PY) of accurate Calculation P point
From in Fig. 1,
P
X＝O'P---------------------------------------(10)
P
Y＝O'O----------------------------------------(11)
Composite type (6), (9), (10) and (11) can be calculated P point coordinate as shown in the formula shown in (12):
As seen from the above description, this method can realize the accurate location to touch location in quadrilateral CDEF.
Based on technique scheme, the method for the touch-screen determination position of touch that the embodiment of the present invention provides, by detecting the range information of described first sensor and described second sensor and touch point respectively; Wherein, described touch point is in the touch area preset; According to the positional information of described range information and described first sensor and described second sensor, determine the positional information of described touch point; The present invention only needs pair of sensors to be infrared receiving/transmission pipe, can determine the position of touch point, and therefore, the quantity of the sensor using the contactor control device of the method to use reduces, and reduces the cost of contactor control device, simplifies the structure of contactor control device.And there is changeability due to the position of touch area and shape, be therefore convenient to the adaptability increasing contactor control device, strengthen Consumer's Experience.
Embodiments provide the method for touch-screen determination position of touch, can be reduced the cost of contactor control device by said method, simplify the structure of contactor control device.
Be introduced the contactor control device that the embodiment of the present invention provides below, contactor control device described below can mutual corresponding reference with the method for above-described touch-screen determination position of touch.
Please refer to Fig. 3, the structured flowchart of the contactor control device that Fig. 3 provides for the embodiment of the present invention; This structure can comprise:
First sensor 100, for detecting the first range information of described first sensor and described touch point;
Second sensor 200, for detecting the second distance information of described second sensor and described touch point; Wherein, described touch point is in the touch area preset;
Positional information determination module 300, for according to described first range information and described second distance information, and the positional information of described first sensor and described second sensor, determine the positional information of described touch point.
Preferably, described first sensor and described second sensor are specially: infrared sensor or ultrasonic sensor.
Wherein, infrared components can be adopted to find range, due to the light velocity quickly, therefore can Reaction time shorten.Consumer's Experience during raising touch-control.
Preferably, described touch area is specifically as follows: square touch region, or rectangular touch region, or circular touch region.
Preferably, described touch area is symmetrical arranged along the projection line of perpendicular bisector on described touch area of described first sensor and described second sensor line.
This contactor control device had both been applicable to be with the occasion of liquid crystal display, was also applicable to the occasion not with liquid crystal display, as long as the surface that can meet touch area is plane or almost plane.
In instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
Professional can also recognize further, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with electronic hardware, computer software or the combination of the two, in order to the interchangeability of hardware and software is clearly described, generally describe composition and the step of each example in the above description according to function.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.
The software module that the method described in conjunction with embodiment disclosed herein or the step of algorithm can directly use hardware, processor to perform, or the combination of the two is implemented.Software module can be placed in the storage medium of other form any known in random access memory (RAM), internal memory, ROM (read-only memory) (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
Above the method for touch-screen determination position of touch provided by the present invention and contactor control device are described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (10)
1. a method for touch-screen determination position of touch, is characterized in that, sets the position of first sensor and the second sensor, determine the positional information of described first sensor and described second sensor, comprising according to pre-defined rule:
Detect the range information of described first sensor and described second sensor and touch point respectively; Wherein, described touch point is in the touch area preset;
According to the positional information of described range information and described first sensor and described second sensor, determine the positional information of described touch point.
2. the method for claim 1, is characterized in that, the described position according to pre-defined rule setting first sensor and the second sensor comprises:
Described first sensor is equal to the distance of place, described touch area plane with described second sensor.
3. method as claimed in claim 2, is characterized in that, described in the method for touch area that presets comprise:
Described first sensor is utilized to determine the first effective coverage;
Described second sensor is utilized to determine the second effective coverage;
The public domain choosing described first effective coverage and described second effective coverage is effective surveyed area;
Described touch area is set in described effective surveyed area.
4. method as claimed in claim 3, is characterized in that, set described touch area and comprise in described effective surveyed area:
Rectangular touch region is set in described effective surveyed area; Or, in described effective surveyed area, set circular touch region; Or, in described effective surveyed area, set square touch region.
5. method as claimed in claim 4, is characterized in that, set described touch area and comprise in described effective surveyed area:
Described touch area is symmetrical arranged along the projection line of perpendicular bisector on described touch area of described first sensor and described second sensor line.
6. the method according to any one of claim 1 to 5, is characterized in that, the described range information detecting described first sensor and described second sensor and touch point respectively comprises:
The range information of described first sensor and described second sensor touch point described in cycle detection and described first sensor and described second sensor in turn.
7. a contactor control device, is characterized in that, comprising:
First sensor, for detecting the first range information of described first sensor and described touch point;
Second sensor, for detecting the second distance information of described second sensor and described touch point; Wherein, described touch point is in the touch area preset;
Positional information determination module, for according to described first range information and described second distance information, and the positional information of described first sensor and described second sensor, determine the positional information of described touch point.
8. contactor control device as claimed in claim 7, it is characterized in that, described first sensor and described second sensor are specially infrared sensor or ultrasonic sensor.
9. contactor control device as claimed in claim 8, it is characterized in that, described touch area is specially square touch region, or rectangular touch region, or circular touch region.
10. contactor control device as claimed in claim 9, it is characterized in that, described touch area is symmetrical arranged along the projection line of perpendicular bisector on described touch area of described first sensor and described second sensor line.
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Application publication date: 20151014 |