CN101266530B - Large-screen three-dimensional measuring touch screen - Google Patents
Large-screen three-dimensional measuring touch screen Download PDFInfo
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- CN101266530B CN101266530B CN 200810015082 CN200810015082A CN101266530B CN 101266530 B CN101266530 B CN 101266530B CN 200810015082 CN200810015082 CN 200810015082 CN 200810015082 A CN200810015082 A CN 200810015082A CN 101266530 B CN101266530 B CN 101266530B
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Abstract
The invention provides a big screen three-dimensional measurement touch screen, light sources are installed at a plurality of rims in the detecting area, a main lens is installed at a position opposite to the light sources, the focal point of the main lens is provided with an ostiole or a narrow slit as a light diaphragm, a lens is provided on the other side of the light diaphragm, the lens and the main lens constitute a confocal optical system, the optical system takes the image of the light source on the photoelectric sensor array, the part of the light source shaded by the shade object forms a shade area on the photoelectric sensor array, the three-dimensional position coordinates of the shade object are obtained after the single-chip system processes signals after photoelectricity conversion executed by the photoelectric sensor array executes, and the three-dimensional position coordinates are transmitted to the exterior applied system through communicating interfaces. The invention can be installed on the projection screen for teaching, for executing interdynamic teaching; can be used in conference projection screen for executing touch operations or calligraph on big screen; and also can be used in interdynamic entertainment equipments, thereby increasing in situ feeling and participation sense, and having a prodigious spreading applications value.
Description
Technical field
The present invention relates to a kind of three-dimensional measurement touch-screen that 17～200 cun giant-screens use that is used for, more specifically belong to a kind of XY position that can measure shelter in the screen area and with the large-screen three-dimensional measuring touch screen of screen near distance.
Background technology
The following four kinds of schemes of the many employings of existing touch-screen:
1, resistive touch screen.The screen body portion of electric resistance touch screen is a multi-layer compound film that is attached to display surface; By one deck glass or organic glass as basic unit; The conductive layer (ITO, indium oxide) that the surface scribbles layer of transparent is stamped one deck outside surface cure process, smooth scratch resistant plastic layer above again; Its inside surface also scribbles one deck ITO, between two conductive layers, has the transparent isolating points of many tiny (less than mils) to separate insulation to them.When the finger contact screen; A contact point appears in two-layer ITO conductive layer, connects the even voltage field of 5V of Y direction because of conductive layer wherein, makes the voltage of detecting layer by the zero non-zero that becomes; After controller detects this connection; Carry out A/D conversion, get final product a certain axial coordinate of touch point, the ultimate principle that Here it is resistive technologies touch-screen is common.Resistive touch screen is destroyed by sharp keen object easily; Top layer ITO fine cracks can occur after using certain hour, even modification, is damaged and ruptures like outer ITO wherein; Just lose effect, so the life-span of resistive touch screen is impermanent as electric conductor.
2, capacitive touch screen is particulate metal conductive materials that sticks layer of transparent at glass surface.When finger touch was on metal level, the electric capacity of contact will change, and made the oscillator frequency that is attached thereto change, and changed through survey frequency and can confirm the touch location acquired information.Because electric capacity changes with the difference of temperature, humidity or ground connection situation, so its less stable tends to produce drift phenomenon.
3, surface acoustic wave is a kind of mechanical wave of propagating along dielectric surface.This kind touch-screen is made up of touch-screen, sonic generator, reverberator and sound wave receptacle, and wherein sonic generator can send a kind of high frequency sound wave and cross over screen surface, and when finger touched screen, the sound wave on the contact promptly was prevented from, and confirms coordinate position thus.The shortcoming of this touch-screen is that cost is higher, can't realize that large scale touches.
4, the infrared-type touch-screen.This touch-screen and the present invention are similar, but it does not have the three-dimensional measurement function, and resolution is lower.This touch-screen is made up of with the reception sensing element the paired infrared that is contained on the touch-screen housing, on screen surface, forms the infra-red detection net, and any touch object can change the infrared ray on the contact and realize touch screen operation.Its major advantage be cheap, easy for installation, do not block screen content, but its resolution is lower.
Active light source is not used in the patented claim 01140344.6,99110572.9,99215973.3 of having announced, and ambient light has many restrictions to operation of equipment, and equipment is complicated; Or need additional handheld device and carry out alternately, and can not use as the three-dimensional measurement touch-screen, all be limited to and use or the complicacy of structure and influence its popularization.
Above touch-screen all has its speciality and range of application, but in needs large scale, high, the unscreened use occasion of precision, the present invention is more suitable.The present invention can measure X, Y, the Z three-dimensional coordinate of shelter in the search coverage simultaneously, is applicable to occasions uses such as large-screen interactive, giant-screen amusement simulator.
Summary of the invention
The purpose of this invention is to provide a kind of large-screen three-dimensional measuring touch screen, remedied the deficiency of prior art.The present invention has adopted video measuring method, can use two or more sets optical systems to realize large-screen three-dimensional measuring touch screen.
A kind of large-screen three-dimensional measuring touch screen; It is characterized in that outside a plurality of edges of search coverage, light source being installed; The position that the search coverage other end and light source are relative is equipped with main lens; The focal position of main lens is provided with an aperture or slit as diaphragm, and the diaphragm opposite side has lens, and lens and main lens constitute confocal optical system (main lens, diaphragm, lens and photosensor arrays four parts are designated hereinafter simply as optical system); Optical system becomes the picture of light source on photosensor arrays; The light source part that thing blocked that is blocked forms a shadow region on photosensor arrays, photosensor arrays carries out obtaining after signal after the opto-electronic conversion is handled by SCM system the position coordinates of shelter, and transfers to outer application system through communication interface.If diaphragm adopts the small pore-like diaphragm, photosensor arrays adopts the planar array type photosensor arrays, to measure the two-dimensional position information that shelter blocks light source.If diaphragm adopts slit-like aperture, photosensor arrays adopts linear array formula photosensor arrays, to measure the one dimension positional information that shelter blocks light source.Measurement range is equipped with two cover optical systems on two sidelines of quadrature each other, to measure the three-dimensional or the two-dimensional position information of shelter.
The present invention can use two catoptrons that the volume of optical system is reduced, and then reduces the cost of equipment.
The present invention also can use the splicing of many group optical systems or use stepped catoptron to reduce the volume of equipment.
The present invention is simple in structure and cost is lower, and easy break-down can not use in a plurality of fields such as education, amusement, commerce, and very big promotional value is arranged.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1, panel construction synoptic diagram of the present invention.
Fig. 2, the imaging synoptic diagram of shelter of the present invention.
Fig. 3, a kind of scheme synoptic diagram that reduces volume of the present invention.
Fig. 4, a kind of scheme synoptic diagram of saving cost of the present invention.
Fig. 5, stepped catoptron method of application synoptic diagram of the present invention.
Wherein 1. search coverages, 2. light source, 3. main lens, 4. diaphragm; 5. photosensor arrays, 6. lens, 7. SCM system, 8. communication interface; 9. shelter, 10. plane mirror, the 11.X axle blocks scope, 12.X axle image; 13.Y axle blocks scope, 14.Y axle image, 15. small mirrors, 16. stepped catoptrons
Embodiment
Like Fig. 1; The invention is characterized in outside the edge of two quadratures of search coverage 1 two light sources 2 are installed; Search coverage 1 other end and light source 2 relative positions are equipped with main lens 3; The focal position of main lens 3 is provided with an aperture or slit as diaphragm 4; Diaphragm 4 opposite sides have lens 6, and lens 6 constitute confocal optical system (main lens 3, diaphragm 4, lens 6 and photosensor arrays 5 four parts are designated hereinafter simply as optical system) with main lens 3, and optical system becomes the picture of light source 2 on photosensor arrays 5.Whether the effect of optical system is to be used for detecting having shelter 9 to get into search coverage 1, to accomplish touch screen functionality.Photosensor arrays 5 can adopt CMOS or CCD linear array or face battle array.Shelter 9 can be finger or teacher's pointer.
Light source 2 part that thing 9 blocked that is blocked forms a shadow region (comprising that the X axle blocks scope 11 and blocks scope 13 with the Y axle) on photosensor arrays 5; The position of shadow region is corresponding one by one with the relative position of shelter 9 on search coverage 1; Photosensor arrays 5 carries out obtaining after signal after the opto-electronic conversion is handled by SCM system 7 position coordinates of shelter, and transfers to outer application system through communication interface 8.Fig. 2 has showed the multiple situation that shelter 9 forms images on photosensor arrays 5 through optical system.
If diaphragm 4 adopts the small pore-like diaphragm, photosensor arrays adopts the planar array type photosensor arrays, and to measure the two-dimensional position information that shelter blocks light source, image that shelter becomes is shown in Fig. 2 A, 2B.If diaphragm 4 adopts slit-like apertures, photosensor arrays adopts linear array formula photosensor arrays, measuring the one dimension positional information that shelter blocks light source, shelter 9 become image shown in Fig. 2 C, 2D.Search coverage 1 is equipped with two cover optical systems on two sidelines of quadrature each other, to measure the three-dimensional or the two-dimensional position information of shelter 9.
In order to reduce volume of the present invention, as shown in Figure 3, in original system; Two plane mirrors 10 have been increased; Light source 2 thing 9 that is blocked blocks imaging like this, behind 10 liang of secondary reflections of plane mirror, at optical system imaging; Optical system becomes the back side by original side, has reduced volume.Optical system also can be formed by many groups of splicings in addition, that is to say that each direction can be by the positional information of two covers or the main lens 3 more than two covers, diaphragm 4, lens 6 and photosensor arrays 5 splicing measurement shelters 9.
In order to reduce cost of the present invention, scheme as shown in Figure 4, the optical information of its both direction reduces cost through small mirrors 15 shared cover optical systems.The scheme that is adopted is identical with Fig. 3; And the plane mirror 10 of both direction is different with the distance of search coverage 1; Being staggered front to back splicing becomes piece image, and the image that is become is shown in Fig. 3 E, and two parts are respectively X axle image 12 and Y axle image 14 up and down; Contain the X axle in the image and block scope 11 and block scope 13 with the Y axle, SCM system is handled the three dimensional local information that can obtain shelter 9 behind the image.
An alternative embodiment of the invention is to have adopted stepped catoptron 16, makes the main lens 3 that needs big volume change light path through stepped catoptron 16, has reduced the size of main lens 3, has also reduced the size of total system simultaneously.
The present invention can be installed on teaching and use projection screen, carries out interactive teaching; Be used for the meeting projection screen, can on giant-screen, carry out touch operation or write; Also can be used for interactive entertainment device, increase presence and sense of participation.
Claims (8)
1. large-screen three-dimensional measuring touch screen; It is characterized in that outside a plurality of edges of search coverage (1), light source (2) being installed; The relative position of the search coverage other end and light source (2) is equipped with main lens (3); The focal position of main lens (3) is provided with an aperture or slit as diaphragm (4), and diaphragm (4) opposite side has lens (6), and lens (6) constitute confocal optical system with main lens (3); Confocal optical system becomes the picture of light source (2) on photosensor arrays (5); The part that thing (9) blocked of being blocked light source (2) goes up at photosensor arrays (5) and forms a shadow region, and photosensor arrays (5) carries out obtaining after signal after the opto-electronic conversion is handled by SCM system (7) position coordinates of shelter (9), and transfers to outer application system through communication interface (8).
2. large-screen three-dimensional measuring touch screen as claimed in claim 1 is characterized in that search coverage (1) is equipped with two covers three-dimensional measurement touch-screen as claimed in claim 1 on two sidelines of quadrature each other, to measure the two-dimensional position information of shelter (9).
3. large-screen three-dimensional measuring touch screen as claimed in claim 1 is characterized in that diaphragm (4) adopts the small pore-like diaphragm, and photosensor arrays (5) adopts the planar array type photosensor arrays, to measure the two-dimensional position information that shelter (9) blocks light source (2).
4. large-screen three-dimensional measuring touch screen as claimed in claim 1 is characterized in that touch-screen can measure the three dimensional local information of shelter (9) in search coverage (1).
5. large-screen three-dimensional measuring touch screen as claimed in claim 1 is characterized in that diaphragm (4) adopts slit-like aperture, and photosensor arrays (5) adopts linear array formula photosensor arrays, to measure the one dimension positional information that shelter (9) blocks light source (2).
6. large-screen three-dimensional measuring touch screen as claimed in claim 1; It is characterized in that between light source (2) and the main lens (3) catoptron (10) being installed; Main lens (3), diaphragm (4), lens (6) and photosensor arrays (5) are transferred to the back from the side of search coverage (1), in addition for reducing the splicing system that volume can adopt many groups three-dimensional measurement touch-screen as claimed in claim 1.
7. large-screen three-dimensional measuring touch screen as claimed in claim 1 is characterized in that having installed a small mirrors (15), and the light source (2) of bidimensional is imaged on same the photosensor arrays (5).
8. large-screen three-dimensional measuring touch screen as claimed in claim 1 is characterized in that between light source (2) and the main lens (3) stepped catoptron (16) being installed, and makes whole size reduce.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810015082 CN101266530B (en) | 2008-04-04 | 2008-04-04 | Large-screen three-dimensional measuring touch screen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810015082 CN101266530B (en) | 2008-04-04 | 2008-04-04 | Large-screen three-dimensional measuring touch screen |
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| Publication Number | Publication Date |
|---|---|
| CN101266530A CN101266530A (en) | 2008-09-17 |
| CN101266530B true CN101266530B (en) | 2012-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200810015082 Expired - Fee Related CN101266530B (en) | 2008-04-04 | 2008-04-04 | Large-screen three-dimensional measuring touch screen |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101847060B (en) * | 2009-03-27 | 2012-10-10 | 联想(北京)有限公司 | Optical touch system and optical touch positioning method |
| CN101866244A (en) * | 2009-04-20 | 2010-10-20 | 北京汇冠新技术股份有限公司 | Touch positioning device |
| CN101976153A (en) * | 2010-07-27 | 2011-02-16 | 苏州瀚瑞微电子有限公司 | Photosensitive touch system |
| RU2018119502A (en) * | 2011-11-21 | 2018-11-15 | Никон Корпорейшн | DISPLAY DEVICE AND DISPLAY MANAGEMENT PROGRAM |
| CN102722254B (en) * | 2012-06-20 | 2015-06-17 | 清华大学深圳研究生院 | Method and system for location interaction |
| CN104484488A (en) * | 2014-12-09 | 2015-04-01 | 湖南大学 | Shadow capturing device on basis of visible-light-communication technology |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101019096A (en) * | 2004-05-05 | 2007-08-15 | 智能技术公司 | Apparatus and method for detecting a pointer relative to a touch surface |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101019096A (en) * | 2004-05-05 | 2007-08-15 | 智能技术公司 | Apparatus and method for detecting a pointer relative to a touch surface |
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| CN101266530A (en) | 2008-09-17 |
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