CN104503673B - A kind of adjustable touch control method of display screen - Google Patents
A kind of adjustable touch control method of display screen Download PDFInfo
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- CN104503673B CN104503673B CN201410742639.7A CN201410742639A CN104503673B CN 104503673 B CN104503673 B CN 104503673B CN 201410742639 A CN201410742639 A CN 201410742639A CN 104503673 B CN104503673 B CN 104503673B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
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Abstract
The invention discloses a kind of adjustable touch control method of display screen, it includes：Step 1: four Angle Positions in display screen distinguish setting signal receiver；Step 2: selecting to be used as calibration point at multiple pointer locations above display screen, and a receiver nearest apart from each calibration point is selected, the time difference that stylus signal is received by each receiver obtains each calibration point to the range difference of each receiver；Step 3: display plane coordinate system is established, and the range difference by being obtained in step 2 obtains the projection coordinate of subpoint of each calibration point in display screen, the affine transformation matrix established between projection point coordinates angular coordinate corresponding with display screen；Step 4: the pointer location in calibration range is by first projecting, further according to the affine indicating positions for navigating to display screen of affine transformation matrix.The adjustable touch control method signal one-way transmission of display screen of the present invention, without reponse system；Touch-control scope and position can arbitrarily be adjusted, and suitable for the screen of any size.
Description
Technical field
A kind of relevant display screen touch technology of the present invention, touch-control distance, position of touch can be realized and touch by particularly relating to one kind
Control the adjustable adjustable touch control method of display screen of scope.
Background technology
Display device uses plane contact type touch technology more at present, but running fix precision is generally by touch-screen resolution ratio
Limitation, in addition opereating specification and operating distance be all very limited, can not realize to the flexible free touch-control of display screen.
Mainly there are two kinds of touch control manners at present to solve the above problems, one is based between contactor control device and reception device
Signal feedback, realize the flexible free touch-control to display screen, contactor control device includes running fix device, by the position of relative movement
Confidence breath by wireless communication technology feeds back to display device, by corresponding position information process, corresponds to the phase of display screen
Position is answered, but this touch technology can only realize slip positioning；The second is the man-machine interactive system based on acquisition technology,
The current product for having had more maturation, such as Leap Motion and Kinect motion sensing control devices, but these interactive systems
Operand is generally very big, and service speed is slow, using by a definite limitation.
The content of the invention
In view of this, it is a primary object of the present invention to provide it is a kind of using 3 calibration algorithms of stylus realize touch-control away from
The display screen adjustable touch control method adjustable and simple to operate from, position of touch and touch-control scope.
To reach above-mentioned purpose, the present invention provides a kind of adjustable touch control method of display screen, and this method comprises the following steps：
Step 1: four Angle Positions in display screen distinguish setting signal receiver；
Step 2: selecting to be used as calibration point at multiple pointer locations above display screen, and one is selected apart from each mark
Nearest receiver is pinpointed, stylus, to receiver transmission signal pulse, is received at multiple calibration points by each receiver
Time difference to signal obtains each calibration point to each receiver and the range difference to nearest receiver；
Step 3: display plane coordinate system, and the distance by being obtained in step 2 are established in face on the basis of display screen
Difference, projection coordinate of each calibration point in the subpoint of display screen is calculated with reference to the relative position information of each receiver, builds
Affine transformation matrix between vertical projection point coordinates angular coordinate corresponding with display screen；
Step 4: the pointer location in calibration range by first projecting, navigates to further according to affine transformation matrix is affine
The indicating positions of display screen.
Each calibration point is calculated in the step 2 is to each receiver and the step of range difference to nearest receiver：
(2.1) four receiver records receive the time of each signal pulse；
(2.2) pulse received is counted, then compares the counting identical pulse that four receivers receive
Time；
(2.3) four receivers are calculated and receives the time difference Δ T for counting identical pulse signali, wherein i=1,2,3,
4, represent signal receiver numbering；
(2.4) the spread speed v of binding signal can calculate calibration point to nearest receiver and other three receivers
Range difference：Δdi=v Δs Ti。
In the step 3, calculate each calibration point is in the step of projection coordinate of the subpoint of display screen：
(3.1) a certain pointer location above display screen is selected as a calibration point, and selects a distance should
The nearest receiver of calibration point, the calibration point is obtained to each receiver and the range difference to nearest receiver；
(3.2) calibration point is calculated to most with reference to the relative position information of each receiver apart from difference data by above-mentioned
The distance L of nearly receiver；
(3.3) calibration point is calculated to respectively connecing by the range difference that is obtained in step (3.1) and the distance L in step (3.2)
Receive the distance of device；
(3.4) distance of each receiver and the relative position information meter of each receiver are reached by step (3.3) calibration point
The calibration point is calculated to be thrown to display plane again in the coordinate on the basis of display plane in space of planes coordinate system, the calibration point
Shadow, obtain projection coordinate of the subpoint in display plane；
(3.5) repeat step (3.1) to (3.4), projection coordinate of multiple calibration points in the subpoint of display plane is obtained.
The time that four receivers receive counting identical pulse in the step (2.2) is respectively T1、T2、T3、T4,
The time difference that four receivers receive counting identical pulse signal in the step (2.3) is Δ Ti=Ti-min{T1,T2,
T3,T4, Δ TiIn at least one be 0.
The signal arrival time difference of each receiver and immediate receiver is [0, Δ T2,ΔT3,ΔT3], calibration point arrives
The air line distance difference of each receiver is Δ di=v Δs Ti=[0, Δ d2,Δd3,Δd4], calibration point to nearest receiver away from
From for L=(Δ d2 2+Δd4 2-Δd3 2)/2(Δd3-Δd2-Δd4), the distance of calibration point to each receiver is [L, L+ Δ d2,L
+Δd3,L+Δd4]。
The number of calibration point is more than three in the step 2.
The adjustable touch control method signal one-way transmission of display screen of the present invention, without reponse system；Touch-control range size and position
Available any regulation of demarcation is put, and suitable for the screen of any size；Suspension touch control, and stylus suspension distance can be realized
It is adjustable；Running fix precision can reach or more than pixel scale according to signal behavior.
Brief description of the drawings
Fig. 1 is the implementation state diagram of the adjustable touch control method of display screen of the present invention；
Fig. 2 is the step flow chart of the adjustable touch control method of display screen of the present invention；
Fig. 3 is the implementation principle figure of the adjustable touch control method of display screen of the present invention.
Embodiment
There is further understanding for ease of the method to the present invention and the effect that reaches, developed simultaneously preferable implementation in conjunction with accompanying drawing
Example describes in detail as follows.
As shown in figure 1, the present invention the adjustable touch control method of display screen in implementation process, four angles first in display screen
Position distinguish setting signal receiver, as in Fig. 1 A be receiver one, B be receiver two, C is receiver three, and D is receiver
Four, E are display screen, and stylus F can launch the signal pulse of specific wavelength (or specific frequency), then as signal generator
The time difference for receiving signal using four receivers calculates stylus to the range difference of each receiver.
With reference to shown in Fig. 2 and Fig. 3, the embodiment that the range difference of stylus to each receiver calculates is：Allow stylus with
Fixed frequency transmission signal pulse (each pulse can be multiple wavelength such as ultrasonic pulse), four receiver records receive
The time of each signal pulse, and the pulse to receiving counts, and then compares the counting phase that four receivers receive
The time of same pulse, the time that four receivers receive counting identical pulse is respectively T1、T2、T3、T4, four receptions
The time difference that device receives counting identical pulse signal is Δ Ti=Ti-min{T1,T2,T3,T4, wherein i=1,2,3,4, table
Show that signal receiver is numbered, the wherein at least one time difference is 0, i.e., receiver nearest apart from stylus receives with itself
The time difference of signal is 0, then the spread speed of binding signal can calculate trigger point and be connect to nearest receiver and other three
Receive device range difference be：Δdi=v Δs Ti.These calculated reflect stylus and four angles of display screen apart from difference data
The relative position information of point.The counting number (including pulse recording time and step-by-step counting) for making four receivers retain needs basis
Ultimate range poor (display screen diagonal distance) calculates, and concrete numerical value is more than or equal to ultimate range difference divided by pulse length
Business, to ensure that four receivers can find corresponding pulse, realize the relative synchronization detection of four receivers.
As shown in figure 3, the angle point of the receiver one on display screen is 1 °, the angle point of receiver two is 2 °, receiver three
Angle point be 3 °, reality a certain position (i.e. calibration point) of the certain point 1 as stylus above display screen is selected, if selected
Determine 1 ° of angle point as with 1 immediate position of pointer location, i.e., receiver one is as immediate recently with pointer location 1
Receiver, obtain the signal arrival time difference of each receiver and immediate receiver one：[0,ΔT2,ΔT3,ΔT3], wherein
ΔT2For receiver two and the signal arrival time difference of receiver one, Δ T3When being reached for the signal of receiver three and receiver one
Between poor, Δ T4For receiver four and the signal arrival time difference of receiver one, other analogues are originated with nearest receiver position
Point is according to arranged clockwise；The air line distance that pointer location 1 to each receiver is calculated using the time difference is poor：Δdi=
v·ΔTi=[0, Δ d2,Δd3,Δd4], wherein Δ d2For the distance and pointer location 1 of pointer location 1 to receiver two
To the difference of the distance of receiver one, Δ d3Receiver is arrived for the distance and pointer location 1 of pointer location 1 to receiver three
The difference of one distance, Δ d4For the distance of the distance and pointer location 1 to receiver one of pointer location 1 to receiver four
Difference.
On the basis of the display plane coordinate system (xoy) where display screen face establish Cartesian coordinates-as shown in Figure 3
Using 2 ° of the angle point of receiver two as display plane coordinate origin, then pass through the coordinate position apart from difference data and receiver
Information or screen size information calculate the distance that pointer location 1 arrives nearest receiver one：L=(Δ d2 2+Δd4 2-Δd3 2)/
2(Δd3-Δd2-Δd4)；The distance that then pointer location 1 reaches each receiver is：[L,L+Δd2,L+Δd3,L+Δd4], and
Thus calculate stylus in cartesian space coordinate system-coordinate；Pointer location 1 is projected to display plane again,
Subpoint 1' is obtained, is believed by the distance of pointer location 1 to each receiver and the co-ordinate position information or screen size of receiver
Breath can-calculate projection coordinate (x of the stylus subpoint 1 ' in display plane1′,y1') coordinate.
It is same as above, as shown in figure 3, reality a certain position of the certain point 2 as stylus above display screen is selected again,
Simultaneously selected receiver two (i.e. 2 ° of angle point) as with 2 immediate receiver of pointer location, selected (the i.e. angle point of receiver three
3 °) as with 3 immediate receiver of pointer location, repeat the above steps, respectively obtain pointer location 2 in display plane
Subpoint 2 ' projection coordinate (x2′,y2') and pointer location 3 the subpoint 3 ' of display plane projection coordinate (x3′,
y3'), by projective transformation (PT), three calibration points will obtain the projection coordinate of three subpoints；This three subpoint (1 ',
2 ', 3 ') coordinate and affine transformation corresponding to display plane coordinate system xoy three corresponding angle point (1 °, 2 °, 3 °) coordinates foundation
(AT) affine transformation matrix, is obtained, hereafter the pointer location S (x, y, z) in calibration range can be thrown by first projecting
Projection coordinate (xs of the shadow point S ' in coordinate system xoys′,ys'), further according to the affine finger for navigating to display screen of affine transformation matrix
Show position S ".
The present invention in actual calculating process by depending on sighting target fixed point or the particular location situation of touch point, generally can be with
Calibration point or touch point space coordinates are directly calculated using formula 1, is then projected and affine transformation, affine transformation can join
Carried out according to formula 2.
(formula 1)
(x, y, z) is trigger point (or calibration point) coordinate in above formula, (x1,y1)、(x2,y2)、(x3,y3) and (x4,y4) it is four
Coordinate of the individual receiver in display screen reference plane, L are set to trigger point to the distance of nearest receiver, Δ d1、Δd2、Δd3
With Δ d4For trigger point to nearest receiver and the range difference of other three receivers, at least one is 0.
As Δ d1、Δd2、Δd3With Δ d4Have two or more values be 0, represent trigger point with two or two with
Upper signal receiver apart from it is identical when, such case will be easier to directly calculate trigger point using formula 1 be in display screen
Space coordinates in the Cartesian coordinates of reference plane, is then projected and affine transformation, demarcation touch surface and touch-control are put down
Touch point in face is mapped, the relevant position corresponded on display screen.
(formula 2)
(x ', y ') is projection point coordinates of three calibration points in display plane in above formula, and (x, y) is corresponding display screen
Curtain angular coordinate, a1,b1,c1,a2,b2,c2For the undetermined coefficient of affine transformation matrix, three pairs of projection point coordinates and screen can be passed through
Angular coordinate combination, which solves, to be come.
Calibration point in the present invention is not limited to three, or four or more.
The adjustable touch control method of display screen of the present invention has the advantages that：
1st, signal one-way transmission, it is simple in construction without reponse system, embodiment；
2nd, touch-control range size and position, which can be used, demarcates any regulation, and suitable for the screen of any size；
3rd, some special touch-controls can be achieved, such as invert touch-control, reverse touch-control etc.；
4th, suspension touch control can be realized, and stylus suspends apart from adjustable；
5th, running fix precision can reach or more than pixel scale according to signal behavior；
6th, installation easy to disassemble and the module slimming of screen body.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (5)
1. a kind of adjustable touch control method of display screen, it is characterised in that this method comprises the following steps：
Step 1: four Angle Positions in display screen distinguish setting signal receiver；
Step 2: selecting to be used as calibration point at multiple pointer locations above display screen, and one is selected apart from each calibration point
Nearest receiver, stylus is set, to receiver transmission signal pulse, letter to be received by each receiver at multiple calibration points
Number time difference obtain each calibration point to each receiver with to nearest receiver range difference；
Step 3: display plane coordinate system, and the range difference by being obtained in step 2 are established in face on the basis of display screen, knot
Projection coordinate of each calibration point in the subpoint of display screen is calculated in the relative position information for closing each receiver, establishes projection
Affine transformation matrix between point coordinates angular coordinate corresponding with display screen；
Step 4: the pointer location in calibration range navigates to display by first projecting, further according to affine transformation matrix is affine
The indicating positions of screen；
In the step 3, calculate each calibration point is in the step of projection coordinate of the subpoint of display screen：
(3.1) a certain pointer location above display screen is selected as a calibration point, and selects one apart from the demarcation
The nearest receiver of point, the calibration point is obtained to each receiver and the range difference to nearest receiver；
(3.2) calibration point is calculated to most proximity with reference to the relative position information of each receiver apart from difference data by above-mentioned
Receive the distance L of device；
(3.3) calibration point is calculated to each receiver by the range difference and the distance L in step (3.2) that are obtained in step (3.1)
Distance；
(3.4) distance of each receiver is reached by step (3.3) calibration point and the relative position information of each receiver calculates
The calibration point is thrown to display plane again in the coordinate on the basis of display plane in the space coordinates in face, the calibration point
Shadow, obtain projection coordinate of the subpoint in display plane；
(3.5) repeat step (3.1) to (3.4), projection coordinate of multiple calibration points in the subpoint of display plane is obtained.
2. the adjustable touch control method of display screen as claimed in claim 1, it is characterised in that each calibration point is calculated in the step 2
It is to each receiver and the step of range difference to nearest receiver：
(2.1) four receiver records receive the time of each signal pulse；
(2.2) pulse received is counted, then compare the counting identical pulse that four receivers receive when
Between；
(2.3) four receivers are calculated and receives the time difference Δ T for counting identical pulse signali, wherein i=1,2,3,4, table
Show that signal receiver is numbered；
(2.4) the spread speed v of binding signal can calculate calibration point to nearest receiver and other three receivers away from
Deviation：Δdi=v Δs Ti。
3. the adjustable touch control method of display screen as claimed in claim 2, it is characterised in that four receptions in the step (2.2)
The time that device receives counting identical pulse is respectively T1、T2、T3、T4, four receivers receive in the step (2.3)
The time difference for counting identical pulse signal is Δ Ti=Ti-min{T1,T2,T3,T4, Δ TiIn at least one be 0.
4. the adjustable touch control method of display screen as claimed in claim 3, it is characterised in that each receiver and immediate receiver
Signal arrival time difference be [0, Δ T2,ΔT3,ΔT4], the air line distance difference of calibration point to each receiver is Δ di=v Δs
Ti=[0, Δ d2,Δd3,Δd4], the distance of calibration point to nearest receiver is L=(Δ d2 2+Δd4 2-Δd3 2)/2(Δd3-Δ
d2-Δd4), the distance of calibration point to each receiver is [L, L+ Δ d2,L+Δd3,L+Δd4]。
5. the adjustable touch control method of display screen as claimed in claim 1, it is characterised in that the number of calibration point in the step 2
For more than three.
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| CN104881192B (en) * | 2015-05-28 | 2018-11-16 | 努比亚技术有限公司 | Operate recognition methods and device and terminal |
| CN110462568A (en) * | 2017-12-14 | 2019-11-15 | 深圳市汇顶科技股份有限公司 | Coordinate determination method, device, electronic equipment and the storage medium of stylus |
| CN112558850B (en) * | 2020-12-16 | 2022-04-26 | 深圳市巨烽显示科技有限公司 | Multi-display mouse seamless moving method and device, computer equipment and medium |
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| CN102857704A (en) * | 2012-09-12 | 2013-01-02 | 天津大学 | Multisource video stitching method with time domain synchronization calibration technology |
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| KR101117481B1 (en) * | 2009-10-12 | 2012-03-07 | 라오넥스(주) | Multi-touch type input controlling system |
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|---|---|---|---|---|
| CN101030321A (en) * | 2006-03-01 | 2007-09-05 | 松下电器产业株式会社 | Remote controller, video apparatus, remote controlling method and system |
| CN101627355A (en) * | 2007-03-08 | 2010-01-13 | Lunascape株式会社 | Optical projection system |
| CN101140661A (en) * | 2007-09-04 | 2008-03-12 | 杭州镭星科技有限公司 | Real time object identification method taking dynamic projection as background |
| CN102857704A (en) * | 2012-09-12 | 2013-01-02 | 天津大学 | Multisource video stitching method with time domain synchronization calibration technology |
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