CN102855024B - A kind of optical touch control system and calculating coordinates of targets method thereof - Google Patents
A kind of optical touch control system and calculating coordinates of targets method thereof Download PDFInfo
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Abstract
The invention discloses a kind of optical touch control system and calculate coordinates of targets method, described method comprises provides a minute surface, to produce a mirror image of a target; One image sensor is provided, obtains a target image of this target and a mirror images of this mirror image; When analyzing this target image and this mirror images forms a superimposed image, obtain the independent image that this target produces; And according to this superimposed image and this independent image, calculate the coordinate of this target.
Description
Technical field
The present invention relates to technical field of optic touch control, and in particular to a kind of optical touch control system and the method calculating coordinates of targets thereof.
Background technology
Touch control screen device a kind ofly allows user on screen directly and the device of application program interactive.Touch control screen device of a great variety, wherein optical touch screen is common one.
Fig. 1 shows a kind of existing optical touch control screen system 1, and it is invented in U.S. Patent Bulletin numbers the 4th, 782, No. 328.As shown in Figure 1, optical touch control screen system 1 comprises two sensors 11, and two sensors 11 is for obtaining the image of the target 13 on touch control screen region 12.Processor 14 couples two sensors 11, by analyzing the image that two sensors 11 produces, to determine the sensing route (sensingpath) 15 of linking objective 13 and two sensors 11 respectively.Processor 14 calculates the position coordinates of target 13 again according to sensing route 15.Optical touch control screen system 1 need use two sensors 11, makes the cost of optical touch control screen system 1 higher.
Fig. 2 shows another kind of existing optical touch control screen system 2.For reducing costs, No. 201003477th, TaiWan, China patent of invention publication number (corresponding case: No. 7689381B2nd, United States Patent (USP)) discloses a kind of optical touch control screen system 2, and it comprises catoptron 21, two light source 22, image sensor 23 and a processor 24.Catoptron 21 and two light sources 22 are arranged on touch area periphery, and catoptron 21 is for generation of a mirror image 26 of target 25.The image of image sensor 23 for generation of target 25 and the image of mirror image 26.Processor 24 is analyzed by the sensing route 27 of the image of target 25 and the sensing route 27 by the image of mirror image 26, and calculates the coordinate of target 25 according to two sensing routes 27.Optical touch control screen system 2 only needs use image sensor 23, therefore can have a lower cost.
In optical touch control screen system 2, when two sensing routes 27 are too close, the image of target 25 can be overlapping with the image of mirror image 26, thus cannot calculate the position of target 25.The problem of target location cannot to be calculated because of overlapping for solving image when the image of target 25 and mirror image 26, No. 201101131st, TaiWan, China patent of invention publication number (corresponding case: No. 2010/0090950A1st, U.S. patent application case) invents a kind of computing method, these computing method are when the image overlap of the image of target 25 and mirror image 26, and the image of the target 25 that can sense according to image sensor 23 and a pre-sizing of target 25 are to calculate the coordinate figure of target 25.In this method, the imaginary orthogonal projection that target 25 is formed on sensitive zones can be visualized as a circular projection, and the radius of this circular projection is above-mentioned pre-sizing.But user may use finger or other soft targets to carry out operating optical formula touch control screen system, and this type of target not easily produces fixing pre-sizing, thus causes calculation error of coordinates.
Summary of the invention
The object of the invention is to for solving the problems of the technologies described above and a kind of optical touch control system be provided and calculate the method for coordinates of targets.
The invention provides a kind of calculating coordinates of targets method.The method comprises the following steps: to provide a minute surface, to produce a mirror image of a target; One image sensor is provided, obtains a target image of this target and a mirror images of this mirror image; When analyzing this target image and this mirror images forms a superimposed image, obtain the independent image that this target produces; And according to this superimposed image and this independent image, calculate a coordinate of this target.
Present invention also offers a kind of calculating coordinates of targets method.The method comprises the following steps: to provide a light projector device in a touch-control surface, and this light projector device comprises a minute surface and a non-specular surface, and this minute surface produces a mirror image of a target, and wherein this minute surface and this non-specular surface arrange on a direction of this touch-control surface vertical; One image sensor is provided, obtains a target image of this target and a mirror images of this mirror image; And when analyzing this target image and this mirror images forms a superimposed image, to obtain in this target image not by a part of edge that this mirror images hides.
Present invention also offers a kind of calculating coordinates of targets method.The method comprises the following steps: to provide a light projector device, and this light projector device comprises a minute surface and a filter element, and this minute surface produces a mirror image of a target, and this filter element is arranged on this minute surface, makes this light projector device reflect one first frequency spectrum light; One image sensor is provided, obtains a target image of this target and a mirror images of this mirror image; There is provided a filtering apparatus, on an incidence surface of this image sensor of covering part, this filtering apparatus filters this first frequency spectrum light light; And when detecting this target image and this mirror images forms a superimposed image, to obtain in this target image not by a part of edge that this mirror images hides.
Present invention also offers a kind of optical touch control system, it comprises a light projector device, an image sensor and a processor.Light projector device comprises a minute surface.Minute surface produces a mirror image of a target.Image sensor obtains a target image of this target and/or a mirror images of this mirror image.Processor is used for when detecting this target image and this mirror images forms a superimposed image, according to this superimposed image and the central point of an independent image to be produced by this target or a center of gravity; Or processor be used for according in the two edges of this superimposed image and this target image not by a part of edge that this mirror images hides, to calculate a coordinate of this target.
The technical characteristic of the invention of sketch out the present invention above and advantage, obtained better understanding to make detailed description of the present invention hereafter.Other technical characteristic and the advantage that form the present patent application the scope of the claims target will be described in hereafter.Persond having ordinary knowledge in the technical field of the present invention should understand, and the concept hereafter disclosed and specific embodiment can be used as basis and revised or design other structure or technique quite easily and realize the object identical with the present invention.Persond having ordinary knowledge in the technical field of the present invention also should understand, and the construction of this kind of equivalence also cannot depart from the spirit and scope of the present invention that accompanying claim proposes.
Accompanying drawing explanation
Fig. 1 shows a kind of existing optical touch control screen system;
Fig. 2 shows another kind of existing optical touch control screen system;
Fig. 3 shows the schematic diagram of the optical touch control system of one embodiment of the invention;
Fig. 4 shows the structural representation of the optical touch control system of one embodiment of the invention;
Fig. 5 shows the target image schematic diagram overlapping with mirror images of one embodiment of the invention;
Fig. 6 shows the independent image schematic diagram of target of one embodiment of the invention;
Fig. 7 shows the schematic diagram of the light projector device of one embodiment of the invention;
Fig. 8 shows the schematic diagram of the light projector device of another embodiment of the present invention;
Fig. 9 shows the schematic diagram of the optical touch control system of another embodiment of the present invention;
Figure 10 shows the image schematic diagram produced by the optical touch control system of Fig. 9 of one embodiment of the invention;
Figure 11 shows the schematic diagram of the optical touch control system of another embodiment of the present invention;
Figure 12 shows the image produced by the optical touch control system of Figure 11 of one embodiment of the invention;
Figure 13 shows the process flow diagram of the calculating coordinates of targets method of one embodiment of the invention;
Figure 14 shows the schematic diagram of the optical touch control system of one embodiment of the invention;
Figure 15 shows the image produced by the optical touch control system of Figure 14 of one embodiment of the invention;
Figure 16 shows another image produced by the optical touch control system of Figure 14 of one embodiment of the invention;
Figure 17 shows the schematic diagram of other lines of observation by target of one embodiment of the invention.
Wherein, description of reference numerals is as follows:
Optical touch control screen system: 1; Optical touch control screen system: 2;
Optical touch control system: 3; Panel: 4;
Image: 5; Image: 6;
Optical touch control system: 9; Image: 10;
Sensor: 11; Touch control screen region: 12;
Target: 13; Processor: 14;
Sensing route: 15; Catoptron: 21;
Light source: 22; Image sensor: 23;
Processor: 24; Target: 25;
Mirror image: 26; Sensing route: 27;
Touch-control surface: 30; Light projector device: 31;
Light projector device: 31a; Light projector device: 31b;
Light projector device: 31c; Light projector device: 31d;
First light projector device: 32; Second light projector device: 33;
Image sensor: 34; Processor: 35;
Target: 36; Target: 36';
Mirror image: 37; Control device: 38;
Filtering apparatus: 39; First area: 41;
Second area: 42; Superimposed image: 50;
Target image: 51; Mirror images: 52;
Edge: 53; Edge: 54;
Independent image: 61; Edge: 62;
Independent image: 71; Light source: 81;
Central point: 91; Center of gravity: 92;
Image: 110; Minute surface: 311;
Reflecting layer: 312; Light-guide device: 313;
Reflector layer: 314; Light source: 315;
Minute surface: 316; Non-specular surface: 317;
Filter element: 318; Superimposed image: 1000;
Target image: 1001; Mirror images: 1002;
Part edge: 1003; Superimposed image: 1100;
Target image: 1101; Mirror images: 1102;
Part edge: 1103; First image: 1501;
Second image: 1502; Central point: EC;
Center of gravity: EGC; Left margin position: EM;
Left margin position: EL; Right margin position: ER;
The thickness of light projector device: H; The height of screen: Y;
The line of observation: Lc, Lgc, Lr, Lm, Ll;
Process step: S1301 ~ S1307.
Embodiment
One embodiment of the invention discloses a kind of calculating coordinates of targets method, this calculating coordinates of targets method is when the mirror images that the mirror image of the target image that a target produces and this target produces forms a superimposed image, obtain the independent image that this target produces, then utilize this superimposed image and this independent image to calculate the coordinate of this target.When target image is overlapping with the mirror images that target mirror picture produces, the method obtaining independent image has many, and those methods all can be used in the present invention.Being exemplified below, changing the light illumination mode of the illuminator in touch control screen system, making not produce mirror images when obtaining image; Or isolation produces the light of mirror images, the light producing target image is only allowed to be incident upon on image sensor; Or shorten the height of mirror image of target, not overlapping with mirror images as independent image using partial target image.
Fig. 3 shows the schematic diagram of the optical touch control system 3 of one embodiment of the invention.Fig. 4 shows the structural representation of the optical touch control system 3 of one embodiment of the invention.With reference to shown in Fig. 3 and Fig. 4, optical touch control system 3 comprises a light projector device (lightprojectingdevice) 31, image sensor 34 and a processor 35.Light projector device 31 is other is located at touch-control surface 30, and comprises a minute surface 311.Minute surface 311 towards touch-control surface 30, to produce a mirror image 37 of the target 36 at the enterprising line operate of touch-control surface 30.Image sensor 34 obtains the image 5 (as shown in Figure 5) in touch-control surface 30 in a scope, and this image 5 can comprise the target image 51 produced by target 36 and the mirror images 52 produced by mirror image 37.Image sensor 34 also may obtain an image 6 (Fig. 6), and image 6 is included in an independent image 61 of the target 36 in touch-control surface 30.In one embodiment, target image 51 can be compared with the background value of image 5 is low one cover image.In another embodiment, target image 51 can be compared with the background value of image 5 is a high reflective image.Processor 35 couples image sensor 34, and by evaluating objects image 51 and mirror images 52, calculates the coordinate of target 36.
When processor 35 pairs of images 5 are analyzed, connect or overlap to form a superimposed image 50 when processor 35 analyzes target image 51 with mirror images 52, when maybe cannot analyze target image 51 and the mirror images 52 of separation, the independent image 61 that processor 35 meeting evaluating objects 36 produces and superimposed image 50, calculate the coordinate of target 36 thus.
The step calculating the coordinate of target 36 is as described below.With reference to shown in Fig. 3, Fig. 5 and Fig. 6, superimposed image 50 analyzed by processor 35, to determine edge 53 and the edge 54 of superimposed image 50.According to edge 53 and edge 54, can determine and extend from datum point, and respectively by the line of observation L of edge 53 with edge 54
rwith L
m, wherein line of observation L
rwith L
mcan represent by following equation:
L
m:y＝m
mx+b
m(1)
L
r:y＝m
rx+b
r(2)
Moreover processor 35 analysis chart, as 6, determines the edge 62 of the independent image 61 of crested in superimposed image 50.Then, determine according to edge 62 and extend from datum point, and pass through the line of observation L at edge 62
l, wherein line of observation L
lcan represent by following equation:
L
l:y＝m
lx+b
l(3)
Afterwards, according to line of observation L
r, L
m, L
lparameter value, the height (Y) of screen and the thickness (H) of light projector device 31, the coordinate (x of target 36 can be calculated with following equation
o, y
o) and the radius (r) of target 36.
y
o＝-r·M
l+b
l+m
lx
o(6)
Can find out from aforesaid calculation procedure, the coordinate calculating target 36 is that direct basis superimposed image 50 calculates with the information of independent image 61 and obtains, and without the need to supposing radius, the method for therefore the present invention's exposure not because of the size variation of Action Target 36, and still accurately can calculate the coordinate of target 36.
Divided by the line of observation L of edge 62 gained of independent image 61
l, coordinate line of observation L
rwith L
m, calculate outside the coordinate of target 36, also can other by lines of observation of target 36, coordinate line of observation L
rwith L
m, calculate the coordinate of target 36.With reference to shown in Fig. 6 and Figure 17, in one embodiment, after obtaining the independent image 61 of Fig. 6, calculate the central point 91 of independent image 61 according to independent image 61, obtain the centre line L of the central point 91 by target 36 thus
cequation.Then according to centre line L
cequation, line of observation L
requation and L
mequation can calculate the coordinate of target 36.
In another embodiment, with reference to shown in Fig. 6 and Figure 17, after obtaining the independent image 61 of Fig. 6, the center of gravity 92 of independent image 61 can be calculated according to independent image 61, calculate the center of gravity line L of the center of gravity 92 by target 36 thus
gcequation.Then according to center of gravity line L
gcequation, line of observation L
requation and L
mequation can calculate the coordinate of target 36.
With reference to shown in Fig. 3 and Fig. 7, there are many methods can use to obtain the independent image 61 of target 36.In the present embodiment, light projector device 31a comprises light source 315, reflecting layer 312 and a light-guide device 313.Light source 315 is arranged at one end of light-guide device 313, to provide light.Light-guide device 313 makes light projector device 31a become a linear light sorurce.When light source 315 is closed, reflecting layer 312 can form the mirror image of target 36; And when light source 315 is opened, the luminescence of light source 315 can pass outwards through reflecting layer 312, irradiate target 36, and cover the reflective of (mask) reflecting layer 312, make image sensor 34 can obtain out the independent image 61 of target 36.
In one embodiment, light projector device 31a separately can comprise a reflector layer 314, and this reflector layer 314 allows light be reflected back in light-guide device 313.
In another embodiment, with reference to shown in Fig. 8, light projector device 31b can comprise multiple light source 81 and reflecting layer 312, and wherein multiple light source 81 can the direction arrangement at an edge of parallel touch-control surface 30; And reflecting layer 312 is arranged at the front of a plurality of light source 81.
With reference to shown in Fig. 3 and Fig. 4, optical touch control system 3 separately can comprise a control device 38, and wherein control device 38 couples light projector device 31.When processor 35 analyze target image 51 overlapping with mirror images 52 after, control device 38 can open the light source in light projector device 31, and light source then penetrates from the minute surface 311 of light projector device 31, and image sensor 34 produces an intended shadow.Now, image sensor 34 can obtain an image.Due to the reflected light of the minute surface 311 of light projector device 31 cover by the luminescence of light source, so on image only can display-object cover image.
Refer again to shown in Fig. 3, optical touch control system 3 separately can comprise one first light projector device 32 and one second light projector device 33.It is other that first light projector device 32 and the second light projector device 33 are arranged at touch-control surface 30, provides the light source formed needed for target image.First light projector device 32 can be a light-emitting device or is a reflex reflector.Second light projector device 33 can be a light-emitting device or is a reflex reflector.
Fig. 9 shows the schematic diagram of the optical touch control system 9 of another embodiment of the present invention.Figure 10 shows the image schematic diagram produced by optical touch control system of one embodiment of the invention.With reference to shown in Fig. 9 and Figure 10, optical touch control system 9 comprises a light projector device 31c, an image sensor 34, and a processor 35.It is other that light projector device 31c is arranged at touch-control surface 30, and comprise minute surface 316 and a non-specular surface 317, and minute surface 316 produces a target mirror picture of target 36, and wherein minute surface 316 and non-specular surface 317 can arrange perpendicular on a direction of touch-control surface 30.Image sensor 34 is for the mirror images 1002 of the target image 1001 and target mirror picture that obtain target 36.
In one embodiment, non-specular surface 317 can comprise a reflective material (retroreflectivematerial).Incident light can reflect back according to former incident direction by reflective material.
With reference to shown in Figure 10, in the present embodiment, at light projector device 31c on the surface of touch-control surface 30, the first half is non-specular surface 317, and Lower Half is minute surface 316.Arrangement like this can make in the image 10 obtained, and the mirror images 1002 produced by target mirror picture, on the direction perpendicular to touch-control surface 30, only can occupy partial image region.When mirror images 1002 overlaps an edge of target image 1001, the mirror images 1002 occupying partial image region can not cover in this edge completely, the coordinate of target 36 like this and size can calculate according to the two edges of superimposed image 1000 and not covered part edge 1003 and obtain, and computing method can according to aforesaid equation (1) to (9).
In one embodiment, light projector device 31c can be a light-emitting device, and it comprises a light source and a light guide, and wherein the luminescence of light source outwards can be penetrated from non-specular surface 317.
In one embodiment, optical touch control system 9 separately comprises one first light projector device 32 and one second light projector device 33.It is other that first light projector device 32 and the second light projector device 33 are arranged at touch-control surface 30, provides the light source formed needed for target image.First light projector device 32 can be a light-emitting device or is a reflex reflector.Second light projector device 33 can be a light-emitting device or is a reflex reflector.
Figure 11 shows the schematic diagram of the optical touch control system 11 of further embodiment of this invention.Figure 12 shows image 110 schematic diagram produced by the optical touch control system 11 of Figure 11 of one embodiment of the invention.With reference to shown in Figure 11, optical touch control system 11 comprises a light projector device 31d, an image sensor 34, and a filtering apparatus 39.
Light projector device 31d comprises minute surface 311 and a filter element 318, and minute surface 311 is for generation of the mirror image of a target 36.Filter element 318 is arranged on minute surface 311, and wherein light is through filter element 318, then after reflecting filter element 318 from minute surface 311, produces tool one first frequency spectrum light.In other words, when wide spectrum light (broadspectrumlight) is by filter element 318, except the first frequency spectrum light, remaining light all cannot pass through filter light element 318.
In one embodiment, the first frequency spectrum light can be ruddiness, blue light or green glow.
With reference to shown in Figure 12, image sensor 34 is for generation of an image 110, and wherein image 110 can comprise the mirror images 1102 of the target image 1101 of target 36 and the mirror image of target 36.
With reference to shown in Figure 11, filtering apparatus 39 is arranged on the incidence surface of image sensor 34, and the incidence surface of covering part.Filtering apparatus 39 is for filtering the first frequency spectrum light.
Especially, the light forming the mirror image of target 36, by after filter element 318, filters out the light except the first frequency spectrum light.During the first frequency spectrum illumination projection image-position sensor 34, filtering apparatus 39 does not allow the first frequency spectrum light to pass through, make the partial image of target 36 cannot be imaged on image sensor 34, therefore the mirror images 1102 of target mirror picture generation is on the direction perpendicular to touch-control surface 30, only can occupy partial image region (as shown in figure 12).Compare ground, image sensor 34 is formed the only wide spectrum light (broadspectrumlight) of target image 1101, and therefore target image can across image 110.Consequently, the height of target image 1101 is greater than mirror images 1102.In other words, when mirror images 1102 overlaps an edge of target image 1101, the mirror images 1102 occupying partial image region can not cover in this edge completely, the coordinate of target 36 like this and size can calculate according to the two edges of superimposed image 1100 and not covered part edge 1103 and obtain, and computing method can according to aforesaid equation (1) to (9).
In one embodiment, filtering apparatus 39 comprises ruddiness optical filter, blue filter or green glow optical filter.
Figure 13 shows the process flow diagram of the calculating coordinates of targets method of one embodiment of the invention.Figure 14 shows the schematic diagram of the optical touch control system of one embodiment of the invention.With reference to shown in Figure 13 and Figure 14, in step S1301, provide a panel 4, panel 4 tool one first plane, this first plane has a first area 41, as touch area.
In step S1302, provide a light projector device 31.Light projector device 31 this first plane vertical, and there is a minute surface 311.Minute surface 311 shines upon first area 41, forms a second area 42.Minute surface 311 shines upon a target 36, forms a mirror image 37.
In step S1303, image sensor 34 obtains an image, and image comprises one first image 1501 (as shown in figure 15) that target 36 produces.
In step S1304, image sensor 34 obtains another image, and this another image comprises one second image 1502 (as shown in figure 16) of target 36 and mirror image 37 generation.
In step S1305, determine the left margin EM of the first image 1501, or determine central point (EC) 91 or the center of gravity (EGC) 92 position (as shown in figure 17) of target 36'.
In step S1306, determine left and right boundary position EL, ER of the second image 1502.
In step S1307, in one embodiment, utilize EM, EL and ER position, calculate size and the coordinate of target 36.In another embodiment, utilize EC, EL and ER position, calculate size and the coordinate of target 36.In another embodiment, utilize EGC, EL and ER position, calculate size and the coordinate of target 36.
Technology contents of the present invention and technical characterstic disclose as above, but person familiar with this technology still may do all replacement and the modification that do not deviate from spirit of the present invention based on teaching of the present invention and announcement.Therefore, protection scope of the present invention should be not limited to those disclosed embodiments, and should comprise various do not deviate from replacement of the present invention and modification, and is contained by following claim.
Claims (18)
1. calculate a coordinates of targets method, it is characterized in that, comprise the following steps:
There is provided a minute surface, to produce a mirror image of a target;
One image sensor is provided, obtains a target image of this target and a mirror images of this mirror image;
When analyzing this target image and this mirror images forms a superimposed image, obtain the independent image that this target produces; And
According to this superimposed image and this independent image, calculate a coordinate of this target.
2. calculating coordinates of targets method according to claim 1, is characterized in that, the step obtaining the independent image that this target produces comprises the following steps:
There is provided a light projector device, comprise this minute surface, wherein this light projector device is for generation of light or utilize this minute surface to produce this mirror image of this target; And
When detecting this target image and this mirror images forms this superimposed image, then drive this light projector device luminous, to obtain this independent image that this target produces.
3. calculating coordinates of targets method according to claim 2, is characterized in that, this light projector device comprises a light-strip and a light source, and this light source is arranged at one end of this light-strip, and the luminescence of this light source outwards projects from this minute surface.
4. calculating coordinates of targets method according to claim 1, is characterized in that, the step calculating a coordinate of this target comprises the following steps:
Two first lines of observation are calculated according to the two edges of this superimposed image;
According in a center of gravity of this independent image, a central point of this independent image or this independent image on this superimposed image an edge of crested calculate one second line of observation; And
This coordinate of this target is calculated according to this two first line of observation and this second line of observation.
5. calculating coordinates of targets method according to claim 4, is characterized in that, also comprises the step calculating a size of this target according to this two first line of observation and this second line of observation.
6. calculate a coordinates of targets method, it is characterized in that, comprise the following steps:
There is provided a light projector device, this light projector device comprises a minute surface, and this minute surface produces a mirror image of a target;
There is provided an image sensor, obtain a target image of this target and a mirror images of this mirror image, wherein the height of this mirror images is less than the height of this target image; And
When analyzing this target image and this mirror images forms a superimposed image, to determine in this target image not by a part of edge that this mirror images hides.
7. calculating coordinates of targets method according to claim 6, it is characterized in that, this light projector device separately comprises a non-specular surface, and wherein this minute surface and this non-specular surface arrange on a direction of a vertical touch-control surface.
8. calculating coordinates of targets method according to claim 7, it is characterized in that, this light projector device comprises a light source, and wherein the luminescence of this light source is penetrated from this non-specular surface.
9. calculating coordinates of targets method according to claim 6, it is characterized in that, also comprise and a filtering apparatus is provided, on one incidence surface of this image sensor of covering part, this filtering apparatus filters one first frequency spectrum light, wherein this light projector device comprises this minute surface and a filter element, and this filter element is arranged on this minute surface, makes this light projector device reflect this first frequency spectrum light.
10. calculating coordinates of targets method according to claim 6, is characterized in that, also comprise the following steps:
Two first lines of observation are calculated according to the two edges of this superimposed image;
One second line of observation is calculated according to a center of gravity of this part edge, this target image or a central point of this target image; And
This coordinate of this target is calculated according to this two first line of observation and this second line of observation.
11. calculating coordinates of targets methods according to claim 10, is characterized in that, also comprise the step calculating a size of this target according to this two first line of observation and this second line of observation.
12. 1 kinds of optical touch control systems, is characterized in that, comprising:
One light projector device, comprises a minute surface, and this minute surface produces a mirror image of a target;
One image sensor, obtains a target image of this target and a mirror images of this mirror image or obtains an independent image of this target; And
One processor, for when detecting this target image and this mirror images forms a superimposed image, according to a central point or a center of gravity of this superimposed image and this independent image, or according in the two edges of this superimposed image and this target image not by a part of edge that this mirror images hides, calculate a coordinate of this target.
13. optical touch control systems according to claim 12, is characterized in that, this processor is used for calculating two first lines of observation according to the two edges of this superimposed image; One second line of observation is calculated according to an edge of crested on this superimposed image in this independent image or this part edge, a central point of this independent image or a stasiofax of this independent image; And this coordinate of this target is calculated according to this two first line of observation and this second line of observation.
14. optical touch control systems according to claim 12, is characterized in that, this light projector device comprises a light source, and wherein the luminescence of this light source is from the outside light projector of this minute surface.
15. optical touch control systems according to claim 14, is characterized in that, also comprise a control device, and wherein this control device couples this light source, and this processor, when this target image is overlapping with this mirror images, drives this control device, makes this light source luminescent.
16. optical touch control systems according to claim 13, is characterized in that, this processor calculates a size of this target according to this two first line of observation and this second line of observation.
17. optical touch control systems according to claim 12, is characterized in that, also comprise a touch-control surface, and wherein this light projector device comprises this minute surface and a non-specular surface, and this minute surface and this non-specular surface arrange on a direction of this touch-control surface vertical.
18. optical touch control systems according to claim 12, it is characterized in that, also comprise a filtering apparatus, for filtering one first frequency spectrum light, wherein this light projector device comprises this minute surface and a filter element, this filter element is arranged on this minute surface, makes this light projector device reflect this first frequency spectrum light of tool; And on an incidence surface of this image sensor of this filtering apparatus covering part.
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| CN102016772A (en) * | 2008-05-09 | 2011-04-13 | 智能技术无限责任公司 | Interactive input system and illumination assembly therefor |
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