CN104503673A - Adjustable touch control method of display screen - Google Patents
Adjustable touch control method of display screen Download PDFInfo
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- CN104503673A CN104503673A CN201410742639.7A CN201410742639A CN104503673A CN 104503673 A CN104503673 A CN 104503673A CN 201410742639 A CN201410742639 A CN 201410742639A CN 104503673 A CN104503673 A CN 104503673A
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- receiver
- display screen
- calibration point
- touch control
- control method
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses an adjustable touch control method of a display screen. The adjustable touch control method comprises the following steps: 1, arranging signal receivers at four corners of the display screen respectively; 2, selecting a plurality of stylus positions above the display screen as calibration points, and selecting a receiver which is nearest to each calibration point, and through time differences of stylus signals received by the receivers, obtaining distance differences from the calibration points to the receivers; 3, establishing a display plane coordinate system, and through the distance differences obtained in the step 2, obtaining projection coordinates of projection points of the calibration points in the display screen, and establishing an affine transformation matrix between coordinates of the projection points and coordinates of corresponding corner points of the display screen; 4, projecting the stylus positions within a calibration range, and affining and positioning the stylus positions to appointed positions of the display screen according to the affine transformation matrix. According to the adjustable touch control method of the display screen, signals are transmitted unidirectionally, and a feedback system is not required; the touch control range and the position can be adjusted arbitrarily, so that the adjustable touch control method is suitable for a screen with any size.
Description
Technical field
The present invention, about a kind of display screen touch technology, refers to especially and a kind ofly can realize touch-control distance, position of touch and all adjustable adjustable touch control method of display screen of touch-control scope.
Background technology
Current display device many employings plane contact type touch technology, but running fix precision is usually by the restriction of touch-screen resolution, and opereating specification and operating distance are all very limited in addition, cannot realize the flexible touch-control freely of display screen.
Mainly contain two kinds of touch control manners at present to solve the problem, the first is based on the signal feedback between contactor control device and receiving trap, realize the flexible free touch-control to display screen, contactor control device comprises moving positioning device, the positional information of relative movement is fed back to display device by wireless communication technology, by corresponding position information process, correspond to the relevant position of display screen, but this touch technology can only realize location of sliding; It two is man-machine interactive systems based on acquisition technology, and had comparatively ripe product at present, as body sense controllers such as Leap Motion and Kinect, but the operand of these interactive systems is usually very large, and operating speed is slow, and application is subject to a definite limitation.
Summary of the invention
In view of this, fundamental purpose of the present invention be to provide a kind of utilize pointer 3 calibration algorithms realize touch-control distance, position of touch and touch-control scope all adjustable and the adjustable touch control method of display screen simple to operate.
For achieving the above object, the invention provides the adjustable touch control method of a kind of display screen, the method comprises the steps:
Step one, four Angle Position signalization receivers respectively at display screen;
Multiple pointer location places above step 2, selection display screen are as calibration point, and select a receiver nearest apart from each calibration point, make pointer at multiple calibration point place to receiver transmit signal pulse, the mistiming being received signal by each receiver obtains each calibration point to each receiver and the range difference to nearest receiver;
Step 3, be that reference field sets up display plane coordinate system with display screen, and the range difference by obtaining in step 2, relative position information in conjunction with each receiver calculates the projection coordinate of each calibration point at the subpoint of display screen, sets up the affine transformation matrix between subpoint coordinate and display screen corresponding angles point coordinate;
Pointer location in step 4, calibration range is passed through first to project, then according to the affine indicating positions navigating to display screen of affine transformation matrix.
Calculating each calibration point in described step 2 to each receiver and the step to the range difference of nearest receiver is:
(2.1) four receiver records receive the time of each signal pulse;
(2.2) pulse received is counted, then compare the time of the identical pulse of counting that four receivers receive;
(2.3) the mistiming Δ T that four receivers receive the identical pulse signal of counting is calculated
i, wherein i=1,2,3,4, represent signal receiver numbering;
(2.4) the velocity of propagation v of binding signal can calculate the range difference of calibration point to nearest receiver and other three receivers: Δ d
i=v Δ T
i.
In described step 3, calculating each calibration point in the step of the projection coordinate of the subpoint of display screen is:
(3.1) select a certain pointer location above display screen as a calibration point, and select a receiver nearest apart from this calibration point, obtain this calibration point to each receiver and the range difference arriving nearest receiver;
(3.2) by above-mentioned range difference data, the relative position information in conjunction with each receiver calculates the distance L of this calibration point to nearest receiver;
(3.3) distance of this calibration point to each receiver is calculated by the distance L in the range difference obtained in step (3.1) and step (3.2);
(3.4) relative position information being arrived each receiver of Distance geometry of each receiver by step (3.3) this calibration point calculates this calibration point taking display plane as coordinate in reference field space coordinates, this calibration point projects to display plane again, obtains the projection coordinate of subpoint at display plane;
(3.5) repeat step (3.1) to (3.4), obtain the projection coordinate of multiple calibration point at the subpoint of display plane.
The time that in described step (2.2), four receivers receive the identical pulse of counting is respectively T
1, T
2, T
3, T
4, in described step (2.3), four receivers receive the mistiming counting identical pulse signal is Δ T
i=T
i-min{T
1, T
2, T
3, T
4, Δ T
iin have at least one to be 0.
The signal arrival time difference of each receiver and immediate receiver is [0, Δ T
2, Δ T
3, Δ T
3], calibration point is Δ d to the air line distance difference of each receiver
i=v Δ T
i=[0, Δ d
2, Δ d
3, Δ d
4], calibration point is L=(Δ d to the distance of nearest receiver
2 2+ Δ d
4 2-Δ d
3 2)/2 (Δ d
3-Δ d
2-Δ d
4), calibration point is [L, L+ Δ d to the distance of each receiver
2, L+ Δ d
3, L+ Δ d
4].
In described step 2, the number of calibration point is more than three.
Touch control method signal one-way transmission that display screen of the present invention is adjustable, without the need to feedback system; Touch-control range size and position can regulate arbitrarily with demarcating, and are applicable to the screen of any size; Suspension touch control can be realized, and pointer suspends apart from adjustable; Running fix precision according to signal behavior, can meet or exceed pixel scale.
Accompanying drawing explanation
Fig. 1 is the enforcement constitutional diagram of the adjustable touch control method of display screen of the present invention;
Fig. 2 is the flow chart of steps of the adjustable touch control method of display screen of the present invention;
Fig. 3 is the enforcement schematic diagram of the adjustable touch control method of display screen of the present invention.
Embodiment
For ease of having further understanding to method of the present invention and the effect that reaches, the existing preferred embodiment that develops simultaneously by reference to the accompanying drawings is described in detail as follows.
As shown in Figure 1, display screen of the present invention is adjustable touch control method is in implementation process, first at four Angle Position signalization receiver respectively of display screen, as A in Fig. 1 be receiver one, B be receiver two, C be receiver three, D is receiver four, E is display screen, pointer F, as signal generator, can launch the signal pulse of specific wavelength (or characteristic frequency), and the mistiming then utilizing four receivers to receive signal calculates the range difference of pointer to each receiver.
Composition graphs 2 is with shown in Fig. 3, the embodiment that pointer calculates to the range difference of each receiver is: allow pointer with fixed frequency transmit signal pulse (each pulse can be that multiple wavelength is as ultrasonic pulse), four receiver records receive the time of each signal pulse, and the pulse received is counted, then compare the time of the identical pulse of counting that four receivers receive, the time that four receivers receive the identical pulse of counting is respectively T
1, T
2, T
3, T
4, it is Δ T that four receivers receive the mistiming counting identical pulse signal
i=T
i-min{T
1, T
2, T
3, T
4; wherein i=1; 2; 3; 4, represent signal receiver numbering, wherein have at least a mistiming to be 0; namely the mistiming of the nearest receiver of distance pointer and itself Received signal strength is 0, then the velocity of propagation of binding signal can calculate trigger point and to the range difference of nearest receiver and other three receivers is: Δ d
i=v Δ T
i.These range difference data calculated reflect the relative position information of pointer and display screen four angle points.The counting number (comprising pulse recording time and step-by-step counting) making four receivers retain need calculate according to ultimate range difference (display screen diagonal distance), concrete numerical value is more than or equal to the business of ultimate range difference divided by pulse length, 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 °, the angle point of receiver three is 3 °, certain above selected display screen is 1: 1 as a certain position of reality (i.e. calibration point) of pointer, if select angle point 1 ° as position immediate with pointer location 1, namely receiver one is as nearest receiver immediate with pointer location 1, obtain the signal arrival time difference of each receiver and immediate receiver one: [0, Δ T
2, Δ T
3, Δ T
3], wherein Δ T
2for receiver two and the signal arrival time difference of receiver one, Δ T
3for receiver three and the signal arrival time difference of receiver one, Δ T
4for receiver four and the signal arrival time difference of receiver one, other analogues with nearest receiver position starting point according to arranged clockwise; This mistiming is utilized to calculate pointer location 1 poor to the air line distance of each receiver: Δ d
i=v Δ T
i=[0, Δ d
2, Δ d
3, Δ d
4], wherein Δ d
2for pointer location 1 to arrive the difference of the distance of receiver one to distance and the pointer location 1 of receiver two, Δ d
3for pointer location 1 to arrive the difference of the distance of receiver one to distance and the pointer location 1 of receiver three, Δ d
4for pointer location 1 to arrive the difference of the distance of receiver one to distance and the pointer location 1 of receiver four.
With the display plane coordinate system (xoy) at display screen place for reference field sets up Cartesian coordinates-as shown in Figure 3 using the angle point 2 ° of receiver two as display plane coordinate origin, then calculate the distance of pointer location 1 to nearest receiver one by the co-ordinate position information of range difference data and receiver or screen size information: L=(Δ d
2 2+ Δ d
4 2-Δ d
3 2)/2 (Δ d
3-Δ d
2-Δ d
4); Then pointer location 1 arrives the distance of each receiver and is: [L, L+ Δ d
2, L+ Δ d
3, L+ Δ d
4], and calculate thus pointer in cartesian space coordinate system-coordinate; Pointer location 1 projects to display plane again, obtain subpoint 1', by pointer location 1 to the co-ordinate position information of the Distance geometry receiver of each receiver or screen size information can-calculate the projection coordinate (x of pointer subpoint 1 ' at display plane
1', y
1') coordinate.
Same as above, as shown in Figure 3, certain again above selected display screen is 1: 2 as a certain position of reality of pointer, selected receiver two (i.e. angle point 2 °) is as receiver immediate with pointer location 2 simultaneously, selected receiver three (i.e. angle point 3 °) is as receiver immediate with pointer location 3, repeat above-mentioned steps, obtain the projection coordinate (x of pointer location 2 at the subpoint 2 ' of display plane respectively
2', y
2') and pointer location 3 at the projection coordinate (x of the subpoint 3 ' of display plane
3', y
3'), by projective transformation (PT), three calibration points will obtain the projection coordinate of three subpoints; These three subpoint (1 ', 2 ', 3 ') coordinates set up corresponding affined transformation (AT) with three corresponding angle points (1 °, 2 °, the 3 °) coordinate of display plane coordinate system xoy, obtain affine transformation matrix, after this pointer location S (x in calibration range, y, z) projection coordinate (x of subpoint S ' at coordinate system xoy can be obtained by first projection
s', y
s'), then according to the affine indicating positions S navigating to display screen of affine transformation matrix ".
The present invention in actual computation process by sighting target fixed point or touch point particular location situation and determine, generally the equal formula 1 that can adopt directly calculates calibration point or touch point volume coordinate, then carries out projecting and affined transformation, and affined transformation can refer to formula 2 and carries out.
In above formula, (x, y, z) is trigger point (or calibration point) coordinate, (x
1, y
1), (x
2, y
2), (x
3, y
3) and (x
4, y
4) be the coordinates of four receivers in display screen reference field, L is set to the distance of trigger point to nearest receiver, Δ d
1, Δ d
2, Δ d
3with Δ d
4for trigger point is to the range difference of nearest receiver and other three receivers, one is had at least to be 0.
As Δ d
1, Δ d
2, Δ d
3with Δ d
4two or more value is had to be 0, represent trigger point with two or more signal receivers apart from time identical, this situation utilizes formula 1 directly to calculate the volume coordinate of trigger point in the Cartesian coordinates of display screen for reference field by being easier to, then carry out projecting and affined transformation, the touch point demarcated in touch surface and touch surface maps, and corresponds to the relevant position on display screen.
In above formula (x ', y ') be the subpoint coordinates of three calibration points in display plane, (x, y) is corresponding display screen angular coordinate, a
1, b
1, c
1, a
2, b
2, c
2for the undetermined coefficient of affine transformation matrix, solve out by three pairs of subpoint coordinates and the combination of screen angular coordinate.
Calibration point in the present invention is not limited to three, also can be four or more.
Display screen of the present invention is adjustable, and touch control method has following beneficial effect:
1, signal one-way transmission, without the need to feedback system, embodiment structure is simple;
2, touch-control range size and position can regulate arbitrarily with demarcating, and are applicable to the screen of any size;
3, some special touch-controls can be realized, as reversion touch-control, reverse touch-control etc.;
4, suspension touch control can be realized, and pointer suspends apart from adjustable;
5, running fix precision according to signal behavior, can meet or exceed pixel scale;
6, be convenient to remove and install and shield the slimming of body module.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (6)
1. the adjustable touch control method of display screen, it is characterized in that, the method comprises the steps:
Step one, four Angle Position signalization receivers respectively at display screen;
Multiple pointer location places above step 2, selection display screen are as calibration point, and select a receiver nearest apart from each calibration point, make pointer at multiple calibration point place to receiver transmit signal pulse, the mistiming being received signal by each receiver obtains each calibration point to each receiver and the range difference to nearest receiver;
Step 3, be that reference field sets up display plane coordinate system with display screen, and the range difference by obtaining in step 2, relative position information in conjunction with each receiver calculates the projection coordinate of each calibration point at the subpoint of display screen, sets up the affine transformation matrix between subpoint coordinate and display screen corresponding angles point coordinate;
Pointer location in step 4, calibration range is passed through first to project, then according to the affine indicating positions navigating to display screen of affine transformation matrix.
2. the adjustable touch control method of display screen as claimed in claim 1, is characterized in that, calculates each calibration point to each receiver and the step to the range difference of nearest receiver to be in described step 2:
(2.1) four receiver records receive the time of each signal pulse;
(2.2) pulse received is counted, then compare the time of the identical pulse of counting that four receivers receive;
(2.3) the mistiming Δ T that four receivers receive the identical pulse signal of counting is calculated
i, wherein i=1,2,3,4, represent signal receiver numbering;
(2.4) the velocity of propagation v of binding signal can calculate the range difference of calibration point to nearest receiver and other three receivers: Δ d
i=v Δ T
i.
3. the adjustable touch control method of display screen as claimed in claim 1, it is characterized in that, in described step 3, calculating each calibration point in the step of the projection coordinate of the subpoint of display screen is:
(3.1) select a certain pointer location above display screen as a calibration point, and select a receiver nearest apart from this calibration point, obtain this calibration point to each receiver and the range difference arriving nearest receiver;
(3.2) by above-mentioned range difference data, the relative position information in conjunction with each receiver calculates the distance L of this calibration point to nearest receiver;
(3.3) distance of this calibration point to each receiver is calculated by the distance L in the range difference obtained in step (3.1) and step (3.2);
(3.4) relative position information being arrived each receiver of Distance geometry of each receiver by step (3.3) this calibration point calculates the coordinate of this calibration point in the space coordinates taking display plane as reference field, this calibration point projects to display plane again, obtains the projection coordinate of subpoint at display plane;
(3.5) repeat step (3.1) to (3.4), obtain the projection coordinate of multiple calibration point at the subpoint of display plane.
4. the adjustable touch control method of display screen as claimed in claim 2, is characterized in that, the time that in described step (2.2), four receivers receive the identical pulse of counting is respectively T
1, T
2, T
3, T
4, in described step (2.3), four receivers receive the mistiming counting identical pulse signal is Δ T
i=T
i-min{T
1, T
2, T
3, T
4, Δ T
iin have at least one to be 0.
5. the adjustable touch control method of display screen as claimed in claim 4, it is characterized in that, the signal arrival time difference of each receiver and immediate receiver is [0, Δ T
2, Δ T
3, Δ T
3], calibration point is Δ d to the air line distance difference of each receiver
i=v Δ T
i=[0, Δ d
2, Δ d
3, Δ d
4], calibration point is L=(Δ d to the distance of nearest receiver
2 2+ Δ d
4 2-Δ d
3 2)/2 (Δ d
3-Δ d
2-Δ d
4), calibration point is [L, L+ Δ d to the distance of each receiver
2, L+ Δ d
3, L+ Δ d
4].
6. the adjustable touch control method of display screen as claimed in claim 1, it is characterized in that, in described step 2, the number of calibration point is more than three.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410742639.7A CN104503673B (en) | 2014-12-08 | 2014-12-08 | A kind of adjustable touch control method of display screen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410742639.7A CN104503673B (en) | 2014-12-08 | 2014-12-08 | A kind of adjustable touch control method of display screen |
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| Publication Number | Publication Date |
|---|---|
| CN104503673A true CN104503673A (en) | 2015-04-08 |
| CN104503673B CN104503673B (en) | 2018-01-16 |
Family
ID=52945074
Family Applications (1)
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|---|---|---|---|
| CN201410742639.7A Active CN104503673B (en) | 2014-12-08 | 2014-12-08 | A kind of adjustable touch control method of display screen |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104881192A (en) * | 2015-05-28 | 2015-09-02 | 努比亚技术有限公司 | Operation recognition method 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 |
| CN112558850A (en) * | 2020-12-16 | 2021-03-26 | 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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| CN104503673B (en) | 2018-01-16 |
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Effective date of registration: 20201215 Address after: No.146 Tianying Road, high tech Zone, Chengdu, Sichuan Province Patentee after: Chengdu CHENXIAN photoelectric Co.,Ltd. Address before: Building 4, No.1 Longteng Road, Kunshan Development Zone, Suzhou City, Jiangsu Province Patentee before: KunShan Go-Visionox Opto-Electronics Co.,Ltd. |