Utility model content
The purpose of this utility model is, a kind of laser scanning touch-screen is provided, and a software kit, to address the above problem.
The technical matters that the utility model solves can realize by the following technical solutions:
Laser scanning touch-screen, comprises a touch screen signal disposal system and a touch pad, it is characterized in that, described touch screen signal disposal system connects a laser distance measuring system;
Described laser distance measuring system comprises a laser instrument, and described laser instrument adopts a word laser instrument, and the angle of the irradiation light of a described word laser instrument and described touch pad face is less than 15 degree;
Described laser distance measuring system also comprises a laser signal Receiver, and described laser signal Receiver is provided with light activated element, and described laser signal Receiver is provided with at least two light activated elements, and at least two light activated elements are arranged and formed light activated element group; Also be provided with an angle optical splitter, described angle optical splitter is positioned at described light activated element group front.
Extraneous light is irradiated on the light activated element of described light activated element group after described angle optical splitter; Described angle optical splitter is one by light source place, the front angle optical device associated with light intensity position, rear,, the different angles of described angle optical splitter front light source, react for the different light intensity on the each described light activated element in light activated element group described in described angle optical splitter rear.It should be noted that irradiation light and the preferably parallel relation of described touch pad face of a word laser instrument.But do to such an extent that absolute parallel is difficult to, be therefore defined as and be less than 15 degree.
Described laser distance measuring system also comprises a data processing circuit system, comprises a light signal receiving processing module, and described light signal receiving processing module connects respectively at least two described light activated elements in described light activated element group.Receive and process the light signal information that at least two described light activated elements receive.
In the time having the part of touch to touch described touch pad, be subject to the Ear Mucosa Treated by He Ne Laser Irradiation that described laser instrument sends, form a reflection source, the light of described reflection source reflection is irradiated at least one described light activated element of described light activated element group after described angle optical splitter.
Described light activated element sends signal to light signal receiving processing module, and then judges the distance of described reflection source, judges the distance that touches part; By described angle optical splitter front light-source angle, with light intensity corresponding relation on the each described light activated element at rear, determine described reflection source, touch the angle of part.
Also comprise a microprocessor system, described microprocessor system connects described light signal receiving processing module.According to the range information that touches part, and angle information, determine the two-dimensional coordinate of described touch part on described touch pad, and then determine the position of touch point, complete touch point location recognition.
Described laser distance measuring system is at least one in the laser distance measuring system of the types such as a pulse type laser range measurement system, phase-shift laser range-finder, triangle locate mode laser distance measuring system.
The phase-shift laser range-finder that preferably utilizes phase method to find range.Described data processing circuit system also comprises a phase signal generation module, and described phase signal generation module connects described laser instrument.There is the advantages such as simple in structure, the setting of touch area is free, easy for installation, sensitivity is high.
Described angle optical splitter can be an imaging lens.By described imaging lens, the picture of described light source is presented in described light activated element group, on light activated element described at least one of described light activated element group, forms the hot spot that a light intensity is stronger.By image-forming principle, reflection source angle is completed associated with the different light intensity on each described light activated element.Imaging lens can be convex lens or an imaging lens group.
Described angle optical splitter can also be a light-filtering channels group, and described light-filtering channels group comprises at least two light-filtering channels, and described light-filtering channels is provided with a light inlet and a light-emitting window;
The light inlet of at least two light-filtering channels is different with the angle of light-emitting window line, for receiving the light of different angles.The extended line of the light inlet of one light-filtering channels and the line of light-emitting window, during through reflection source (touch part), the light signal receiving on light activated element corresponding to light-filtering channels rear is strong, a little less than the light signal receiving on light activated element corresponding to incongruent other light-filtering channels of geometric relationship, even do not have.And then reflection source angle is completed associated with the different light intensity on each described light activated element.
Described light signal receiving processing module is provided with one scan circuit, connects respectively light activated element described in each in described light activated element group by described sweep circuit, receives respectively the electric signal that light activated element produces described in each.So that system is carried out signal processing.
The arrangement mode of the light activated element in described light activated element group is linear array.The linear place plane being arranged in and plane included angle, described touch pad place are less than 15 degree.So that the light of the reflection source forming on reception touch pad.
Described light activated element can be arranged in a straight line structure or camber line structure.
Described light activated element can adopt the light activated elements such as phototriode, photodiode, photosensitive field effect transistor.
Described laser distance measuring system is preferably arranged on described touch pad bight.
Can described laser distance measuring system be set respectively at two of a described touch pad diagonal angle.So that be applicable to large scale touch-screen.
Can described laser distance measuring system be set respectively at two of a described touch pad adjacent angle.So that realize multiple point touching.
The light-emitting window of the light-filtering channels of described light-filtering channels group has a light activated element, i.e. a corresponding light activated element of light-filtering channels, and the light-sensitive surface of described light activated element props up described light-emitting window, or the light-sensitive surface of described light activated element is embedded in described light-emitting window.Disturb to reduce mutual signal.
Or have at least two light activated elements at the light-emitting window of described light-filtering channels, so that strengthen the electrical signal intensity producing.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with further elaboration the utility model of concrete diagram.
With reference to Fig. 1, Fig. 2, Fig. 3, laser scanning touch-screen, comprises a touch screen signal disposal system 1 and a touch pad 2.Touch screen signal disposal system 1 comprises a laser distance measuring system 3, and laser distance measuring system 3 is a phase-shift laser range-finder 3.Laser distance measuring system 3 can be also the laser distance measuring system of the type such as a pulse type laser range measurement system or triangle locate mode laser distance measuring system.Laser distance measuring system 3 comprises a laser instrument 31, and laser instrument 31 adopts a word laser instrument, and 2 angles of the irradiation light of a word laser instrument and touch pad are less than 15 degree.The light that one word laser instrument is got, is radiated in plane in front and presents word line, utilizes a word laser illumination to go out the feature of light, and a word laser instrument is often used in the calibration of buildings collimation.
Laser distance measuring system 3 also comprises a laser signal Receiver 32, and laser signal Receiver 32 is provided with by least two light activated elements 41 light activated element group 4 forming of arranging, and is also provided with an angle optical splitter 5; Angle optical splitter 5 is positioned at light activated element group 4 fronts; Extraneous light is irradiated on the light activated element 41 of light activated element group 4 after angle optical splitter 5; Angle optical splitter 5 is one by light source place, the front angle optical device associated with light intensity position, rear, that is, the different angles of angle optical splitter 5 front light sources, react for the different light intensity on the each light activated element 41 in angle optical splitter 5 rear light activated element groups 4.Laser distance measuring system 3 also comprises a data processing circuit system 33, and data processing circuit system 33 comprises a phase signal generation module, phase signal generation module connecting laser 31; Also comprise a light signal receiving processing module, light signal receiving processing module connects respectively at least two light activated elements 41 (can connect by coding circuit) in light activated element group 4; Receive and process the light signal information that at least two light activated elements 41 receive.In the time having the part of touch to touch touch pad 2, be subject to the Ear Mucosa Treated by He Ne Laser Irradiation that laser instrument 31 sends, form a reflection source, the light of reflection source reflection is irradiated at least one light activated element 41 of light activated element group 4 after over-angle optical splitter 5.Light activated element 41 sends signal to light signal receiving processing module, and then judges the distance of reflection source, judges the distance that touches part.By angle optical splitter 5 front light-source angles, with light intensity corresponding relation on each light activated element 41 at rear, determine reflection source, touch the angle of part.
Touch screen signal disposal system 1 also comprises a microprocessor system 6, microprocessor system 6 connects light signal receiving processing module, according to the range information that touches part, and angle information, determine and touch the two-dimensional coordinate of part on touch pad 2, and then determine the position of touch point, complete touch point location recognition.
With reference to a in Fig. 3, angle optical splitter 5 can be an imaging lens, by imaging lens, the picture of light source is presented in light activated element group 4, at least one light activated element 41 of light activated element group 4, forms the hot spot that a light intensity is stronger.By image-forming principle, reflection source angle is completed associated with the different light intensity on each light activated element 41.Imaging lens can be convex lens or an imaging lens group.
With reference to b in Fig. 3, angle optical splitter 5 can also be a light-filtering channels group, and light-filtering channels group comprises at least two light-filtering channels, and light-filtering channels is provided with a light inlet and a light-emitting window; The light inlet of at least two light-filtering channels is different with the angle of light-emitting window line, for receiving the light of different angles.The extended line of the light inlet of one light-filtering channels and the line of light-emitting window, during through reflection source (touch part), the light signal receiving on light activated element 41 corresponding to light-filtering channels rear is strong, a little less than the light signal receiving on light activated element 41 corresponding to incongruent other light-filtering channels of geometric relationship, even do not have.And then reflection source angle is completed associated with the different light intensity on each light activated element 41.
Light signal receiving processing module is provided with one scan circuit, connects respectively each light activated element 41 in light activated element group 4 by sweep circuit, receives respectively the electric signal that each light activated element 41 produces.Can be that timesharing receives, or receive respectively after encoding respectively.So that system is carried out signal processing.
The arrangement mode of the light activated element 41 in light activated element group 4 is linear array.The linear place plane being arranged in and touch pad 2 plane included angles, place are less than 15 degree.So that receive the light of the reflection source forming on touch pad 2.Light activated element 41 can be arranged in a straight line structure or camber line structure.Light activated element 41 can adopt the light activated elements 41 such as phototriode, photodiode, photosensitive field effect transistor.Laser distance measuring system 3 is preferably arranged on touch pad 2 bights.Can laser distance measuring system 3 be set respectively at two of touch pad 2 diagonal angle.So that be applicable to large scale touch-screen.Can laser distance measuring system 3 be set respectively at two of touch pad 2 adjacent angle.So that realize multiple point touching.
The light-emitting window of the light-filtering channels of light-filtering channels group has a light activated element 41, i.e. a corresponding light activated element 41 of light-filtering channels, and the light-sensitive surface of light activated element 41 props up light-emitting window, or the light-sensitive surface of light activated element 41 is embedded in light-emitting window.Disturb to reduce mutual signal.Or have at least two light activated elements 41 at the light-emitting window of light-filtering channels, so that strengthen the electrical signal intensity producing.
With reference to Fig. 4, the interior operation of microprocessor system 6 has a touch point scanning software.
First, in microprocessor system 6, first write scanning profile.Can be by read-in angle and scanning distance corresponding to angle, thereby depict scanning profile.Scanning while having object in scanning profile, this object is considered as touching part, and produces touch-responsive at correspondence position.
Microprocessor system 6 does not respond for the object that exceeds scanning profile,, in a certain angle, when the object distance scanning is greater than the distance setting, does not respond.
The mode that writes scanning profile can be:
(1) laser scanning touch-screen is being installed, and is being started after system, first touch point scanning software carries out environmental scanning, periphery is produced to the periphery object distance of blocking to laser beam and scan and record.Periphery contour of object in the setting sweep limit scanning is as described scanning profile.Periphery object is likely touch pad frame, wall etc.Described setting sweep limit can be to set scanning coverage, sets the mode of scanning coverage, can be the data beyond deletion setpoint distance.Can also be to realize by the sensitivity of setting laser range measurement system.
After having scanned, periphery object space is recorded and preserved, and then complete scanning profile and write work.This can be that periphery object place distance and angle are recorded and preserved.
After completing environmental scanning, enter work scanning mode, scanning in same angle, while having than the nearer object of periphery object, this object is considered as touching part, and produces touch-responsive at correspondence position.
By above-mentioned technology, can make whole installation process simpler.
(2) mode that writes scanning profile can also be, imports scanning profile data, imports each angle and the scanning distance corresponding with this angle, thereby depicts scanning profile.
Scan mode can be:
In scanning process, microprocessor system 6 receives respectively the electric signal that each light activated element 41 produces, scanning touch part, and at least two light activated elements 41 receive light signal, and when the distance value that microprocessor system 6 calculates according to each light activated element 41 differs and exceedes a setting value, peek is worth little distance value., microprocessor system 6 is approved the numerical value of the nearer light activated element of scanning distance 41.This design, helps avoid touch pad 2 object in addition scanning result is caused to interference.
And when the distance value that microprocessor system 6 calculates according to each light activated element 41 differs and exceedes a setting value, peek is worth little distance value., microprocessor system 6 is approved the numerical value of the nearer light activated element of scanning distance 41.This design, helps avoid touch pad 2 object in addition scanning result is caused to interference.
Or, in scanning process, microprocessor system 6 receives respectively the electric signal that each light activated element 41 produces, scanning touch part, and at least two light activated elements 41 receive light signal, microprocessor system 6, according at least two light activated elements 41, is determined the corresponding angle value of each light activated element 41, and microprocessor system 6 is got the corresponding light activated element 41 of intermediate value of all angles value.
Can be directly can be by each light activated element 41 of the electric signal of microprocessor system 6 effective identifications by continuously arranged several generations, light activated element 41 in the middle of coming is as preferred light activated element 41, and microprocessor system 6 is using the angle value of these light activated element 41 correspondences as the angle value that touches part.
The above-mentioned preferred version for angle recognition, can suitably eliminate because focus on the inaccurate problem that causes error.
In the time scanning a touch part, receive from touching part reflection ray, and the light activated element 41 identified by microprocessor system 6 of signal, be considered as efficient light photosensitive elements 41; Microprocessor system 6 is carried out priority scan to the light activated element 41 of efficient light photosensitive elements 41 peripheries.
Can be, microprocessor system 6 be to efficient light photosensitive elements 41 both sides, and every side accounts for total light activated element 41 quantity 1/5th and scans with interior light activated element 41, forms preferential light activated element 41 scanning areas, and other light activated elements 41 no longer scan.To save the energy, and improve degree of accuracy.
In microprocessor system 6, preferential light activated element 41 scanning areas are scanned, but while scanning less than touch part, again whole light activated elements 41 are scanned.
In cycle sweep time in the time that whole light activated elements 41 are scanned, be greater than cycle sweep time when preferential light activated element 41 scanning areas are scanned.So that in ensureing sweep velocity, ensure quality of scanning.
In the time that whole light activated elements 41 are scanned, to the sweep time of single light activated element 41, be less than sweep time when preferential light activated element 41 scanning areas are scanned.So that accurately scan in the time having the part of touch.
More than show and described ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and instructions, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.