CN101882028A - Method for correcting optical touch screen and optical touch screen - Google Patents
Method for correcting optical touch screen and optical touch screen Download PDFInfo
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- CN101882028A CN101882028A CN2009100834587A CN200910083458A CN101882028A CN 101882028 A CN101882028 A CN 101882028A CN 2009100834587 A CN2009100834587 A CN 2009100834587A CN 200910083458 A CN200910083458 A CN 200910083458A CN 101882028 A CN101882028 A CN 101882028A
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Abstract
The invention provides a method for correcting an optical touch screen and the optical touch screen, wherein the method is applied to processing equipment comprising a camera and a positioning assembly and comprises the following steps: obtaining a first position, wherein the first position is the position of the positioning assembly in a first image; transferring a second position, wherein the second position is the standard position of the positioning assembly in the first image; comparing the first position with the standard position to obtain a comparative result; and when the comparative result indicates that the first position is different from the standard position, adjusting a parameter to be corrected to enable the first position and the standard position to be superposed. The embodiment of the invention has the following advantages that: various errors occurring in the optical touch screen are automatically corrected by adopting the reflected ray of a refletor positioned at the standard position, automatic correction is a process carried out at any time, and the manual intervention of a user is not needed; if reflective stripes are adopted in the production process for real-time correction to eliminate mechanism errors, the production efficiency can be improved.
Description
Technical field
The present invention relates to Optical touch screen technology, be meant a kind of method and optical touch screen that optical touch screen is proofreaied and correct especially.
Background technology
Optical touch screen technology is a kind of novel touch screen technology, based on blocking or reflection ray is judged the position of finger the contact of finger on screen.Than other touch screen technology, can reduce the cost of large scale touch-screen, be a kind of desirable low-cost multiple point touching technology.
In present multiple point touching solution, camera and light source are placed on the edge of screen usually, light source illuminates screen surface, produce because of the blocking-up light source when camera is caught finger touch reflective or the shade that forms, and calculate the normal place of finger.But in the process of using Optical touch screen technology, because a variety of causes can produce the mechanism error of the position of camera in the optical touch screen equipment.
In the prior art, when dispatching from the factory, optical touch screen is done once demarcation accurately, to eliminate mechanism error and camera is installed in correct position.But in the use, because it is unpunctual that various factors cause the detection of finger position, need the user to start trimming process, specify several default reference points by trimming process on screen, the user comes optical touch screen is proofreaied and correct by clicking these reference points.
The inventor is in realizing process of the present invention, find that there are the following problems at least in the prior art: existing alignment technique needs the user manually to intervene, and be to feel that the user touch-screen just do not proofread and correct on time to the detection of finger or touch objects position such as felt pen, influenced the user application of touch-screen is experienced.
Summary of the invention
The purpose of this invention is to provide a kind of method and optical touch screen that optical touch screen is proofreaied and correct, be used to eliminate mechanism error and camera is installed in correct position, and further optical touch screen is proofreaied and correct in real time.
A kind of method that optical touch equipment is proofreaied and correct is applied in the treatment facility that includes a camera and positioning component, comprising: obtain a primary importance, wherein, described primary importance is the position of described positioning component in first image; Transfer the second place, wherein, the described second place is the normal place of described positioning component in described first image; Described primary importance and described normal place are compared, obtain a comparative result; When comparative result shows described primary importance and described normal place not simultaneously, then parameter to be calibrated is adjusted, so that described primary importance and described normal place are overlapping.
A kind of optical touch screen comprises: positioning component is used to be arranged on described optical touch screen; Detecting unit is used to obtain a primary importance, and wherein, described primary importance is the position of described positioning component in first image; Transfer the second place, wherein, the described second place is the normal place of described positioning component in described first image; The error comparing unit is used for described primary importance and described normal place are compared, and obtains a comparative result; Correcting unit is used for showing described primary importance and described normal place not simultaneously when comparative result, then adjusts according to predetermined calibration parameter, so that described primary importance and described normal place are overlapping.
Embodiments of the invention have following beneficial effect, the reflection ray that is positioned at the reflecting piece of normal place by employing is proofreaied and correct voluntarily to the various errors that optical touch screen occurred, proofreading and correct voluntarily is a process of carrying out at any time, does not need user's manual intervention; And if adopted reflecting strips to proofread and correct in real time in the production run to eliminate mechanism error, could enhance productivity.
Description of drawings
The principle schematic that Fig. 1 proofreaies and correct optical touch screen for the embodiment of the invention;
Fig. 2 adopts reflecting piece correction error synoptic diagram for the embodiment of the invention;
Fig. 3 has the optical touch screen of camera and light source for the embodiment of the invention;
Fig. 4 is for being arranged in the effective coverage in the camera visual field under the embodiment of the invention normal condition;
The error of threshold value appears exceeding in Fig. 5 for the effective coverage of embodiment of the invention cutting;
Fig. 6 has the optical touch screen of calibration function for the embodiment of the invention.
Embodiment
For making purpose of the present invention, technical characterictic and implementation result clearer, below in conjunction with the accompanying drawings and the specific embodiments technical scheme of the present invention is described in detail.Among the embodiment provided by the invention, not only eliminate mechanism error and camera is installed in correct position with simple method, and, further at least one reflecting piece is installed at the ad-hoc location at the edge of optical touch screen 101, realize real-time correction to optical touch screen 101.
Present embodiment provides a kind of method that optical touch screen 101 is proofreaied and correct, and is applied in the treatment facility that includes a camera and positioning component 100, comprising:
Step 301 is obtained a primary importance, and wherein, described primary importance is the position of described positioning component 100 in first image;
Step 302 is transferred the second place, and wherein, the described second place is the normal place of described positioning component 100 in described first image;
Step 303 compares described primary importance and described normal place, obtains a comparative result;
Step 304 when comparative result shows described primary importance and described normal place not simultaneously, is then adjusted parameter to be calibrated, so that described primary importance and described normal place are overlapping.
Realize the technology that present embodiment provides, it is above-mentioned that what adjust voluntarily can be a process of carrying out at any time, therefore can proofread and correct timely the various errors that optical touch screen 101 is occurred, and not need user's manual intervention, for the user provides better experience; If provide error responses in real time, then can be so that more convenient the adjusting of user, practicality is better.
In the present embodiment, described positioning component 100 comprises at least one keeper 102; Obtain the primary importance of each described keeper 102, the described primary importance that gets access to further comprises:
Obtain the location parameter of each described keeper 102 in optical touch screen 101 equipment, calculate the primary importance of described keeper 102 at the edge of described optical touch screen 101 according to described location parameter.
Wherein, when described keeper 102 is at least one reflecting piece, there are spot and/or striped on the described reflecting piece, make that described calibration reflection ray and the touch objects pairing reflection ray corresponding with described reflecting piece are inconsistent.For each described reflecting piece, obtain the described primary importance of this reflecting piece according to the reflection ray of this reflecting piece.Specifically as shown in Figure 1, optical touch screen 101 in use for some time, reasons such as the deformation that produces owing to expanding with heat and contract with cold, can produce mechanism error, this moment, the normal place and the primary importance that Equipment Inspection is arrived of one contact can be inconsistent, when this error arrives to a certain degree greatly, just need proofread and correct when promptly surpassing a threshold value.Positioning component 100 among Fig. 1 has comprised several keepers 102, and what keeper 102 specifically adopted is reflecting piece; Promptly some reflecting piece are installed as positioning component 100 at the ad-hoc location at optical touch screen 101 edges, these reflecting piece are very little and light reflection mode is different with finger.Wherein, touch objects can specifically be finger or felt pen etc.
As shown in Figure 2, the position A in the below, position B, position C and position D are positioned on the optical touch screen 101, specifically are at its frame place, edge, a reflecting piece is arranged respectively, and in optical touch screen 101 equipment normal place is separately arranged; The primary importance of A in equipment then is position A1, as can be seen, Equipment Inspection to position A1 and the normal place of A between exist an error amount.Because equipment is deposited normal place relevant for the reflecting piece at position A place in advance, and equipment thinks that this error amount has surpassed a described threshold value, therefore when judging that current time optical touch screen equipment is in the spare time that does not have the user to operate, and begins correction voluntarily.
Because optical touch screen 101 should be rectangle usually, the calculating of its length and width is linear relationships, so the corresponding relation between normal place and the primary importance is also comparatively simple, even linear.Equipment can be finished correction automatically in the spare time that does not have the user to operate, and in trimming process voluntarily, successively position A, position B, position C and position D is detected and adjusts, and does not need user's manual intervention, experiences for the user provides better application.
The embodiment of the invention not only can be carried out from normal moveout correction the optical touch screen in the use 101, and can in process of production light source on the optical touch screen 101 104 and camera 103 be proofreaied and correct.As shown in Figure 3, in the optical touch screen 101 that has camera 103 and light source 104, camera 103 and light source 104 are placed on the edge of optical touch screen 101 usually, light source 104 is used for illuminating screen edge, what produce because of blocking-up light source 104 when camera 103 is used for catching finger touch is reflective, and further by other devices according to the reflective normal place that calculates finger, therefore on three Spatial Dimensions, can introduce mechanism error.When specific implementation, in order to reduce data volume that need to handle to reduce power consumption and computing time, view data is carried out in advance image cutting (Image Cropping), the i.e. that part of cutting that only finger can be occurred in camera 103 visuals field is come out, as shown in Figure 4, under the normal condition, light from light source 104 is blocked, and on finger, a hot spot is arranged, going out one in camera 103 visuals field has the zone of finger to be called the effective coverage, crop other parts outside the effective coverage, the normal place of described effective coverage leaves in the equipment of supporting camera 103 in advance.Described finger can be regarded the concrete application of touch objects as.
In the present embodiment, as described in Figure 5, the effective coverage no longer is in a horizontal level, the error of threshold value occurred exceeding, for overcome in the installation process mechanism error to the influence of image cutting, the reflecting strips that real-time correction can be seen in assembling and production run in the visual field of camera 103.At first on the edge of optical touch screen 101 frame, mount a reflecting strips, so positioning component described in the present embodiment 100 only comprises a keeper 102 as keeper 102.Specifically comprise: when described keeper 102 was the reflecting strips of a rectangle, described reflecting strips was attached to the frame place, edge of described optical touch screen 101, and the length of described reflecting strips and width length and the width with described edge frame is corresponding one by one respectively; During comparison, when the image of described reflecting strips all appears in the camera 103, calculate the primary importance of described image, and compare, generate described error amount with described normal place; The length and the width of reflecting strips are known in advance.
The reflecting strips that occurs in the visual field of camera 103 is called second reflecting strips, if misfit the default effective coverage in the visual field of second reflecting strips and camera 103, mechanism error has appearred in the installation that then can think light source 104 or camera 103, adjusts.Because reflecting strips has been located the particular location of edge frame and the zone that finger may occur, therefore make the centerline of described image in horizontality in this trimming process, make that the primary importance and the described normal place of described image are overlapping, to finish the image cutting.After finishing the image cutting, can take down reflecting strips.
Consider the accuracy of correction, the length of reflecting strips and the precision of width can than equipment can discern the high order of magnitude of precision of support.For example but the accuracy of identification of the optical touch screen 101 of equipment is 0.5 millimeter, and then the precision of the length of reflecting strips and width is 0.05 millimeter.
How to use described reflecting strips for further announcement and eliminate mechanism error in process of production, below provide one at the preferred embodiment on the production line: produce on the streamline of optical touch screen 101 one, behind the position that described optical touch screen 101 arrives on the streamline, fix in this position, one mechanical arm is set, this mechanical arm is attached to the frame place, edge of described optical touch screen 101 with a reflecting strips, and the length of described reflecting strips and width length and the width with described edge frame is corresponding one by one respectively; Owing to adopted mechanical arm but not manually-operated, therefore can guarantee that reflecting strips is attached to the normal place of the edge frame of described optical touch screen 101.
When comparing,, calculate the primary importance of described image when reflecting strips all appears at when being an image in the camera, and with the described normal place comparison of reflecting strips, obtain a comparative result.
When comparative result shows described primary importance and described normal place not simultaneously, then parameter to be calibrated is adjusted, so that described primary importance and described normal place are overlapping.
Finish after the aforesaid operations, described optical touch screen 101 is separated from fixing, the next operation that enters streamline.
The technology that present embodiment provides adopts reflecting strips to proofread and correct in real time in process of production, eliminates mechanism error, has improved production efficiency.
With a kind of method that optical touch screen is proofreaied and correct accordingly, the embodiment of the invention also provides a kind of optical touch screen 101, as shown in Figure 6, comprising:
Detecting unit 201 is used to obtain a primary importance, and wherein, described primary importance is the position of described positioning component 100 in first image; Transfer the second place, wherein, the described second place is the normal place of described positioning component 100 in described first image;
Realize the technology that present embodiment provides, it is above-mentioned that what adjust voluntarily can be a process of carrying out at any time, therefore can proofread and correct timely the various errors that optical touch screen 101 is occurred, and not need user's manual intervention, for the user provides better experience; If provide error responses in real time as described comparative result, then can be so that more convenient the adjusting of user, practicality is better.
Described positioning component 100 comprises at least one keeper 102;
Detecting unit 201 is specially one and cuts out module, is used for cutting out the image that comprises whole described reflecting strips when the image of described reflecting strips all appears at camera 103; Calculate the primary importance of described image, and compare, generate described comparative result with described normal place.
Embodiments of the invention have following beneficial effect, the reflection ray of the reflecting piece by adopting normal place is proofreaied and correct voluntarily to the various errors that optical touch screen 101 is occurred, proofreading and correct voluntarily is a process of carrying out at any time, does not need user's manual intervention; And if adopted reflecting strips to proofread and correct in real time in the production run to eliminate mechanism error, could enhance productivity.
Should be noted that above embodiment is only unrestricted in order to technical scheme of the present invention to be described, all parameter values can be according to the actual conditions adjustment, and in this rights protection scope.Those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention, and do not break away from the spiritual scope of technical solution of the present invention, and it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. the method that optical touch screen is proofreaied and correct is applied in the optical touch screen equipment that includes a camera and positioning component, it is characterized in that, comprising:
Obtain a primary importance, wherein, described primary importance is the position of described positioning component in first image;
Transfer the second place, wherein, the described second place is the normal place of described positioning component in described first image;
Described primary importance and described normal place are compared, obtain a comparative result;
When comparative result shows described primary importance and described normal place not simultaneously, then parameter to be calibrated is adjusted, so that described primary importance and described normal place are overlapping.
2. method according to claim 1 is characterized in that described positioning component comprises at least one keeper, and the described primary importance of obtaining further comprises:
Obtain the location parameter of each described keeper in optical touch screen, calculate the described primary importance of described keeper at the edge of described optical touch screen according to described location parameter;
When described keeper is at least one reflecting piece,, obtain the described primary importance of this reflecting piece according to the calibration reflection ray of this reflecting piece for each described reflecting piece.
3. method according to claim 2 is characterized in that, has spot and/or striped on the described reflecting piece, makes that described calibration reflection ray and the touch objects pairing reflection ray corresponding with described reflecting piece are inconsistent.
4. method according to claim 2 is characterized in that, described obtaining before the primary importance also comprises:
Judge that current time optical touch screen equipment is in the spare time that does not have the user to operate.
5. method according to claim 1 is characterized in that, described positioning component is specially a rectangular reflective bar; Described primary importance and described normal place are compared, obtain a comparative result, further comprise:
Described reflecting strips is attached to the frame place, edge of described optical touch screen, and the length of described reflecting strips and width length and the width with described edge frame is corresponding one by one respectively;
When comparing,, calculate the primary importance of described image when described reflecting strips all appears at when being an image in the camera, and with the described normal place comparison of described reflecting strips, obtain a comparative result.
6. method according to claim 5 is characterized in that, obtains also comprising after the comparative result:
The centerline that described image is set makes the primary importance of described image and described normal place overlapping in horizontality.
7. an optical touch screen is characterized in that, comprising:
Positioning component is used to be arranged on described optical touch screen;
Detecting unit is used to obtain a primary importance, and wherein, described primary importance is the position of described positioning component in first image; Transfer the second place, wherein, the described second place is the normal place of described positioning component in described first image;
The error comparing unit is used for described primary importance and described normal place are compared, and obtains a comparative result;
Correcting unit is used for showing described primary importance and described normal place not simultaneously when comparative result, then adjusts according to predetermined calibration parameter, so that described primary importance and described normal place are overlapping.
8. optical touch screen according to claim 7 is characterized in that described positioning component comprises at least one keeper, and described keeper is specially reflecting piece;
There are spot and/or striped on the described reflecting piece, make that described calibration reflection ray and the touch objects pairing reflection ray corresponding with described reflecting piece are inconsistent.
9. optical touch screen according to claim 7 is characterized in that, described positioning component comprises:
Reflecting strips is used to be attached to the frame place, edge of described optical touch screen, and the length of described reflecting strips and width length and the width with described edge frame is corresponding one by one respectively;
Described detecting unit is specially one and cuts out module, is used for cutting out the image that comprises whole described reflecting strips when the image of described reflecting strips all appears at camera; Calculate the primary importance of described image, and compare, generate described comparative result with described normal place.
10. optical touch screen according to claim 7 is characterized in that, described correcting unit is specially a shooting image adjusting module, and the centerline that is used to described image is set makes the primary importance of described image and described normal place overlapping in horizontality.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100834587A CN101882028B (en) | 2009-05-05 | 2009-05-05 | Method for correcting optical touch screen and optical touch screen |
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| CN2009100834587A CN101882028B (en) | 2009-05-05 | 2009-05-05 | Method for correcting optical touch screen and optical touch screen |
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| CN101882028B CN101882028B (en) | 2012-03-07 |
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Cited By (8)
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| CN102331890A (en) * | 2011-10-24 | 2012-01-25 | 苏州佳世达电通有限公司 | Optical touch screen and optical sensing correction method thereof |
| CN102508582A (en) * | 2011-11-30 | 2012-06-20 | 无锡海森诺科技有限公司 | Optical touch calibration automatic adjusting method |
| CN102520869A (en) * | 2011-12-23 | 2012-06-27 | 广东威创视讯科技股份有限公司 | Automatic parameter adjusting method for imaging touch screen of camera |
| CN102637094A (en) * | 2011-02-15 | 2012-08-15 | 纬创资通股份有限公司 | Correction information calculation method and system applied to optical touch device |
| CN102981683A (en) * | 2012-12-10 | 2013-03-20 | 广东威创视讯科技股份有限公司 | Rapid correction method and optical axis correction method for optical positioning block of camera |
| CN103487692A (en) * | 2013-09-25 | 2014-01-01 | 成都吉锐触摸技术股份有限公司 | Quality detecting method of touch screen |
| CN104281848A (en) * | 2013-07-01 | 2015-01-14 | 佛山市顺德区顺达电脑厂有限公司 | Optical image correction system |
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| CN100590577C (en) * | 2006-09-27 | 2010-02-17 | 广东威创视讯科技股份有限公司 | Touch screen positioning device and method thereof |
| CN101354621A (en) * | 2008-09-12 | 2009-01-28 | 青岛海信移动通信技术股份有限公司 | Method and apparatus for determining touch screen calibration parameter |
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| US20120206410A1 (en) * | 2011-02-15 | 2012-08-16 | Hsun-Hao Chang | Method and system for generating calibration information for an optical imaging touch display device |
| US9019241B2 (en) | 2011-02-15 | 2015-04-28 | Wistron Corporation | Method and system for generating calibration information for an optical imaging touch display device |
| CN102637094A (en) * | 2011-02-15 | 2012-08-15 | 纬创资通股份有限公司 | Correction information calculation method and system applied to optical touch device |
| CN102331890A (en) * | 2011-10-24 | 2012-01-25 | 苏州佳世达电通有限公司 | Optical touch screen and optical sensing correction method thereof |
| CN102508582B (en) * | 2011-11-30 | 2015-01-07 | 无锡海森诺科技有限公司 | Optical touch calibration automatic adjusting method |
| CN102508582A (en) * | 2011-11-30 | 2012-06-20 | 无锡海森诺科技有限公司 | Optical touch calibration automatic adjusting method |
| CN102520869B (en) * | 2011-12-23 | 2013-12-04 | 广东威创视讯科技股份有限公司 | Automatic parameter adjusting method for imaging touch screen of camera |
| CN102520869A (en) * | 2011-12-23 | 2012-06-27 | 广东威创视讯科技股份有限公司 | Automatic parameter adjusting method for imaging touch screen of camera |
| CN102981683A (en) * | 2012-12-10 | 2013-03-20 | 广东威创视讯科技股份有限公司 | Rapid correction method and optical axis correction method for optical positioning block of camera |
| CN102981683B (en) * | 2012-12-10 | 2016-05-25 | 广东威创视讯科技股份有限公司 | A kind of camera optical alignment method for quickly correcting and optical axis bearing calibration thereof |
| CN104281848A (en) * | 2013-07-01 | 2015-01-14 | 佛山市顺德区顺达电脑厂有限公司 | Optical image correction system |
| CN104281848B (en) * | 2013-07-01 | 2017-12-19 | 佛山市顺德区顺达电脑厂有限公司 | Optical image corrects system |
| CN103487692A (en) * | 2013-09-25 | 2014-01-01 | 成都吉锐触摸技术股份有限公司 | Quality detecting method of touch screen |
| CN103487692B (en) * | 2013-09-25 | 2016-08-17 | 成都吉锐触摸技术股份有限公司 | A kind of quality determining method of touch screen |
| CN111246162A (en) * | 2019-12-09 | 2020-06-05 | 北京金风科创风电设备有限公司 | Position correction method and device for tower clearance monitoring equipment of wind generating set |
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