CN102999225A - Optical touch system with track detection function and optical touch method - Google Patents
Optical touch system with track detection function and optical touch method Download PDFInfo
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- CN102999225A CN102999225A CN2011102711269A CN201110271126A CN102999225A CN 102999225 A CN102999225 A CN 102999225A CN 2011102711269 A CN2011102711269 A CN 2011102711269A CN 201110271126 A CN201110271126 A CN 201110271126A CN 102999225 A CN102999225 A CN 102999225A
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Abstract
The invention discloses an optical touch system with a track detection function. The optical touch system comprises a light source, a sensing digit group, a motion detector and a processor, wherein the light source is used for emitting specific light ray; the sensing digit group is used for sampling an indicator to reflect the light ray of the specific light within a preset time and generating a first sensing image signal and a second sensing image signal according to the light ray of the specific light; the motion detector is used for judging a moving track of the indicator according to the first sensing image signal and the second sensing image signal so as to output a motion vector signal; the processor is used for controlling the moving behavior of a target object according to the motion vector signal and the preset time; and the indicator moves in a first area of the sensing digit group.
Description
Technical field
The present invention relates to a kind of touch-control system,, relate in particular to a kind of optical touch control system with track detection function.
Background technology
General touch-control system mainly comprises a Trackpad, a treating apparatus, and a display panel.Usually the user can be placed on finger on the Trackpad mobilely, with by treating apparatus, comes the object (such as a cursor) in the mobile display panel accordingly.In background technology, the user points the distance that mobile distance can equal cursor movement usually.In other words, the size of Trackpad needs the same with display panel greatly, and meeting is so that the cost rising.If dwindle the size of Trackpad, just the distance that cursor must be moved is set as a fixing multiple of the mobile distance of finger, yet do like this degree of accuracy that can reduce Trackpad.For instance, if Trackpad wide X only, if the user 2X that cursor will be moved right then, he must be placed on finger on the Trackpad, and moves right twice, each maximum mobile X, could be so that cursor moves right 2X.Perhaps, the moving distance information of the finger that detects on the Trackpad be multiply by twice, user X that just can move right a time like this, and can allow the cursor 2X that moves right, but so just reduced degree of accuracy.Therefore, in the touch-control system of background technology, manufacturer must face the difficult problem that cost increases or degree of accuracy descends.
Summary of the invention
The invention provides a kind of optical touch control system of tool track sensing function, to address the above problem.
This optical touch control system comprises a light source, is used for launching a particular light ray; One sensing array was used within a schedule time, and the indicant of taking a sample reflects the light of this particular light ray, to produce according to this one first and one second sensing image signal; One moving detector, be used for according to this first with this second sensing image signal, judge that track that this indicant moves is to export a dynamic vector signal; And a processor, be used for controlling the mobile behavior of this object according to this dynamic vector signal and this schedule time; Wherein this indicant is mobile in a first area of this sensing array.
The present invention also provides a kind of method of control one optical touch control system.The method comprises the dynamic vector signal of detection one indicant within a schedule time; And according to this dynamic vector signal and this schedule time, control an object and move.
Description of drawings
Fig. 1 is the synoptic diagram of the optical touch control system of explanation tool track sensing function of the present invention.
Fig. 2 illustrates that optical touch control system of the present invention according to displacement, angle and the velocity information of indicant, comes the synoptic diagram of moving target thing.
Fig. 3 illustrates that optical touch control system of the present invention according to displacement, angle and the acceleration information of indicant, comes the synoptic diagram of moving target thing.
Fig. 4 illustrates that optical touch control system of the present invention comes the synoptic diagram of moving target thing in other kind of mode when the position of indicant is positioned at a specific region.
Fig. 5 illustrates the synoptic diagram that pass between Trackpad and display panel is in the optical touch control system of the present invention.
Wherein, description of reference numerals is as follows:
100 optical touch control systems
110 display panels
130 processors
210 light filters
220 sensing arrays
250 proximity transducers
270 moving detectors
280 light sources
IR sensing image signal
SC2, SC6 control signal
MV dynamic vector signal
The F finger
The C vernier
D1, D2, D3, D4, D5 distance
Q2, Q4, Q5 angle
Embodiment
Optical touch control system of the present invention can comprise a processor, perhaps is connected with a processor, in order to control the movement of an object in the display panel.
Please refer to Fig. 1.Fig. 1 is the synoptic diagram of the optical touch control system 100 that tool track sensing function of the present invention is described, in the present embodiment, optical touch control system comprises processor.Optical touch control system comprises a light filter (filter) 210, a sensing array 220, near (proximity) detecting device 250, a moving detector 270, a light source 280, a processor 130, and a display panel 110.In addition, in embodiments of the invention, Trackpad is defined as the combination of light filter 210 and sensing array 220.
Then the user can move his finger F, with mobile cursor C.At this time the light that sends of light source 280 can be reflexed to sensing array 240 by finger F, because sensing array 220 has added light filter 210, therefore sensing array 220 detected light just can be judged and launched by light source 280, the light that reflects through finger F again, sensing array 220 was able within a schedule time, continue the sampling finger F and reflect the light of this particular light ray, to produce according to this one first sensing image signal and one second sensing image signal.
Therefore, the invisible light that utilizes light source 280 to send, allow finger F can be on sensing array 220 imaging to produce sensing image signal IR, its sensing image shape can for example be the fingerprint shape.Proximity detector 250 just can be according to sensing image signal IR, judges the distance B 1 of finger F and sensing array 220, to produce according to this control signal SC2, controls the startup of moving detector 270 and closes.
More particularly, the light intensity that proximity detector 250 reflects according to sensing image signal IR, the distance B 1 of judgement finger F and sensing array 220.When the distance B 1 of judging greater than an indication apart from the time, the expression finger F may be around sensing array 220, can not need to do mobile the detection this moment, so control signal SC2 can close moving detector 270 to save electric power.Otherwise, when the distance B 1 of judging less than this indication apart from the time, the expression finger F should be close to sensing array 220, just need to do mobile the detection this moment, so control signal SC2 can start moving detector 270 to move detection.
For instance, in fact sensing array 220 can be come finger F is taken a sample with a fixed frequency, and therefore the difference of adjacent two sensing image signal IR1 and IR2 (not shown) is dynamic vector signal MV.That is to say that moving detector 270 can deduct last sensing image signal IR1 with a rear sensing image signal IR2, just can obtain the dynamic vector signal MV of finger F.Moreover, owing to know the sampling frequency of sensing array 220, therefore can know adjacent sensing image signal IR1 and IR2 interlude.Thus, according to dynamic vector signal MV and adjacent sensing image signal IR1 and the IR2 interlude of finger F, just can learn velocity information and the acceleration information of finger F when mobile.
In addition, processor 130 also can be coupled to sensing array 220 (not icon).Also can't learn the physical location of finger F owing to the information (dynamic vector signal MV) that obtains by moving detector 270, if therefore to learn the physical location (that is point on Trackpad position) of finger F, processor 130 just needs directly reception sensing image signal IR.The benefit of learning the position of finger F is to be that processor 130 can in addition again according to the position of finger F, control the mode that cursor C moves.
Below graphic the function mode of optical touch control system 100 of the present invention will be described with example.In following graphic in, be that the mode of overlooking shows optical touch control system 100, and for convenience of description, omit light filter 210.In addition, the following example only illustrates that sensing array 220 is sampled to adjacent two sensing image signals and the dynamic vector signal MV that draws, and the function mode of a plurality of sensing image signals can the rest may be inferred repeats no more.
Please refer to Fig. 2.Fig. 2 is for illustrating that optical touch control system 100 of the present invention according to displacement, angle and the velocity information of indicant, comes the synoptic diagram of moving target thing.As shown in Figure 2, dynamic vector signal MV represents that finger F with angle Q2, has moved distance B 2.Originally cursor C can be equally with angle Q2, moving distance information D2; Yet processor 130 is in addition according to the velocity information V (D2/T, T are the sample period of sensing array 220) that moves of finger F, and having heightened the distance that cursor C moves becomes D3.That is to say that the relation of distance B 3 and D2 and velocity information V can be as shown in the formula representing: D3=D2 * V * C=D2 * D2/T * C=CD22/T, wherein C is a constant.For instance, establishing constant C is 1, if the user has moved 10 millimeters (D2) with constant speed degree information in 5 seconds (T), the distance of the cursor movement that causes is 20 millimeters (D3=102/5); If the user has moved 10 millimeters (D2) with constant speed degree information in 2 seconds (T), the distance of the cursor movement that causes is=50 millimeters (D3=102/2).
Please refer to Fig. 3.Fig. 3 is for illustrating that optical touch control system 100 of the present invention according to displacement, angle and the acceleration information of indicant, comes the synoptic diagram of moving target thing.As shown in Figure 3, dynamic vector signal MV represents that finger F with angle Q4, has moved distance B 4.Originally cursor C can be equally with angle Q4, moving distance information D4; Yet processor 130 is in addition according to the acceleration information E (E can be D2/ (T2), and wherein T is time sample period of sensing array 220) that moves of finger F, and having heightened the distance that cursor C moves becomes D5.That is to say that the relation of distance B 5 and D4 and acceleration information E can be as shown in the formula representing: D5=D4 * E * C=D4 * D4/T2 * C=CD42/T2, wherein C is a constant.For instance, establishing constant C is 1, if the user in 5 seconds (T) to accelerate and moved 10 millimeters (D4), 4 millimeters of the distances of the cursor movement that causes (D5=102/52) since 0; If the user has moved 10 millimeters (D4), 25 millimeters of the distances of the cursor movement that causes (D5=102/22) with constant speed degree information in 2 seconds (T).
Please refer to Fig. 4.Fig. 4 is for illustrating that optical touch control system 100 of the present invention comes the synoptic diagram of moving target thing in other kind of mode when the position of indicant is positioned at a specific region.As shown in Figure 4, definable of the present invention zone A1 is a specific region, to carry out the mode of another kind of moving target thing.In finger F falls within regional A1 and when parking, processor 130 can be set cursor C according to previous mobile direction, continues mobilely, and mobile velocity information can be set as velocity information or a predetermined speed information of previous movement, and it is applicable not affect the present invention.Meaning can be divided into the sensing array first area and second area, when indicant moves in the first area, the sensing array continues output dynamic vector signal with mobile this object, when indicant moved to a second area of this sensing array and parks in this second area, it was mobile with this dynamic vector signal before parking this object to be continued.
Fig. 5 A and Fig. 5 B illustrate the synoptic diagram of Trackpad and display panel Relations Among in the optical touch control system of the present invention.Fig. 5 A represents to have between optical touch control plate and the display panel zone of overlapping, that is to say that the optical touch control plate is arranged at the top of display panel.This embodiment often is applied to intelligent mobile phone now.Fig. 5 B represents not have between optical touch control plate and the display panel zone of overlapping.This embodiment often is applied to mobile computer.Optical touch control system of the present invention can Fig. 5 A or Fig. 5 B realize, that is can be applicable to intelligent mobile phone, mobile computer or other electronic installation.Under the implementation of Fig. 5 A, that is so-called directly contact, processor 130 employed functions can be linear function.Preferably, how many finger F moves, and how much mobile object C is just, or becomes multiple proportional relation.Under the implementation of Fig. 5 B, that is so-called indirect contact, processor 130 employed functions can be nonlinear function.Preferably, the distance that moves of the cursor C distance that can move greater than finger F.
In addition, the user can with above-mentioned Fig. 2,3,4 described embodiment in in conjunction with or revise, for example consider simultaneously velocity information and acceleration information or in the specific region, only consider angle and do not consider velocity information and acceleration information ... Deng, its variation is too numerous to enumerate, should be those skilled in the art can derive easily, therefore repeats no more.
In summary, optical touch control system provided by the present invention can according to velocity information and the dynamic vector signal of indicant (finger), optionally move shown object (cursor).Thus, when the user wants the distance that makes cursor movement larger, the user can be with velocity information moveable finger faster, and cursor just can move larger distance.Perhaps, the user can moveable finger to a specific region, allows cursor continue to move toward this direction.Therefore, the invention provides and to reduce the scheme that Trackpad size (that is size of reduction sensing array/light filter) is kept precision simultaneously, to allow the more convenient use of user optical touch control system of the present invention.
The above only is the preferred embodiments of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (13)
1. the optical touch control system of a tool track sensing function in order to the track according to sensing, moves the object in the display panel, it is characterized in that this optical touch control system comprises:
One light source is used for launching a particular light ray;
One sensing array, be used within a schedule time, continue sampling one indicant and reflect the light of this particular light ray, to produce according to this one first sensing image signal and one second sensing image signal, respectively with one first sensing image signal and one second sensing image signal correction; And
One moving detector, be used for according to this first with this second sensing image signal, export a dynamic vector signal, represent the track that this indicant moves;
Wherein this indicant is mobile in a first area of this sensing array.
2. optical touch control system as claimed in claim 1 is characterized in that, this optical touch control system comprises a processor in addition, is used for controlling the movement of this object according to this dynamic vector signal and this schedule time.
3. optical touch control system as claimed in claim 1 is characterized in that, this optical touch control system also comprises:
One proximity detector is used for judging the indication of one between this indicant and this optical touch control system distance;
Wherein when this proximity detector was judged this indication distance greater than a predetermined value, this moving detector was closed.
4. optical touch control system as claimed in claim 1 is characterized in that, this dynamic vector signal comprises a moving distance information and a moving direction information; This moving direction information is in order to mobile this object; This moving distance information and this schedule time, in order to producing a velocity information, and according to this velocity information and this moving distance information, mobile this object.
5. optical touch control system as claimed in claim 1 is characterized in that, when this indicant moved to a second area of this sensing array and parks in this second area, it was mobile with this dynamic vector signal before parking this object to be continued.
6. optical touch control system as claimed in claim 5 is characterized in that, this object continues to move according to a predetermined speed information.
7. optical touch control system as claimed in claim 1 is characterized in that, also comprises a light filter, is arranged at this sensing array, the light of being launched with non-this light source of filtering.
8. the method for control one optical touch control system in order to the track according to sensing, moves the object in the display panel, it is characterized in that the method comprises:
Within a schedule time, continue sampling one indicant and reflect the light of this particular light ray, to produce according to this one first signal of video signal and one second signal of video signal, respectively with one first sensing image signal and one second sensing image signal correction;
According to this first with this second sensing image signal, export a dynamic vector signal, represent the track that this indicant moves;
Wherein this indicant is mobile in a first area of this sensing array.
9. method as claimed in claim 8 is characterized in that, according to this dynamic vector signal and this schedule time, controls this object and moves, and comprising:
According to a moving direction information of this dynamic vector signal, mobile this object;
A moving distance information and this schedule time according to this dynamic vector signal, produce a velocity information; And
According to this moving distance information and this velocity information, mobile this object.
10. method as claimed in claim 8 is characterized in that, the method also comprises:
Detect the distance between this indicant and this optical touch control system.
11. method as claimed in claim 10 is characterized in that, when the distance between this indicant and this optical touch control system during greater than a predetermined value, stops to detect the dynamic vector signal of this indicant.
12. method as claimed in claim 8 is characterized in that, the method also comprises:
Detect this indicant in a position of this optical touch control system; And
When this position is positioned at a specific region of this optical touch control system and parks in this specific region, mobile with this dynamic vector signal before parking this object is continued.
13. method as claimed in claim 12 is characterized in that, controls this object and continues mobile comprising:
Controlling this object continues to move with a predetermined speed information.
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| CN2011102711269A CN102999225A (en) | 2011-09-14 | 2011-09-14 | Optical touch system with track detection function and optical touch method |
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| CN2011102711269A CN102999225A (en) | 2011-09-14 | 2011-09-14 | Optical touch system with track detection function and optical touch method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104122988A (en) * | 2013-04-29 | 2014-10-29 | 敦南科技股份有限公司 | Motion sensing device and motion sensing system thereof |
| CN110674707A (en) * | 2019-09-06 | 2020-01-10 | 北京集创北方科技股份有限公司 | Biological feature detection method, biological feature detection device and electronic equipment |
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| CN101211239A (en) * | 2006-12-31 | 2008-07-02 | 联想(北京)有限公司 | Human-machine interaction input device and input method |
| US20080167834A1 (en) * | 2007-01-07 | 2008-07-10 | Herz Scott M | Using ambient light sensor to augment proximity sensor output |
| CN101593061A (en) * | 2008-05-30 | 2009-12-02 | 王志维 | Induction type control device |
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| CN1766823A (en) * | 2004-10-28 | 2006-05-03 | 感知通信株式会社 | Pen type optical pointing device |
| CN101211239A (en) * | 2006-12-31 | 2008-07-02 | 联想(北京)有限公司 | Human-machine interaction input device and input method |
| US20080167834A1 (en) * | 2007-01-07 | 2008-07-10 | Herz Scott M | Using ambient light sensor to augment proximity sensor output |
| CN101593061A (en) * | 2008-05-30 | 2009-12-02 | 王志维 | Induction type control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104122988A (en) * | 2013-04-29 | 2014-10-29 | 敦南科技股份有限公司 | Motion sensing device and motion sensing system thereof |
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Application publication date: 20130327 |