CN102004586B - Touch point positioning device and method - Google Patents
Touch point positioning device and method Download PDFInfo
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- CN102004586B CN102004586B CN 201010558355 CN201010558355A CN102004586B CN 102004586 B CN102004586 B CN 102004586B CN 201010558355 CN201010558355 CN 201010558355 CN 201010558355 A CN201010558355 A CN 201010558355A CN 102004586 B CN102004586 B CN 102004586B
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Abstract
The invention discloses a touch point positioning device which comprises a control unit, an infrared receiving tube array and more than two straight infrared laser light sources, wherein the straight infrared laser light sources are arranged on different positions of a frame of a touch display screen, the infrared receiving tube array is arranged on the frame of the touch display screen, an infrared laser plane formed by infrared laser emitted by the straight infrared laser light sources covers the touch display screen, and the infrared laser is received by the infrared receiving tube array on the frame of the touch display screen; and the control unit is respectively connected with the infrared receiving tube array and the straight infrared laser light sources and used for controlling the infrared receiving tube array and the straight infrared laser light sources. The invention also discloses a touch point positioning method. The device has the advantages of accurate positioning, simple structure, wide application range, low realizing cost, capability of effectively realizing the multipoint touch positioning, and the like.
Description
Technical field
The present invention relates to the electronic touch technical field, particularly a kind of touch point locating device and method.
Background technology
Existing infrared touching device be with infrared emission and infrared receiver component according to mode one to one form emission receive right, consist of an orthogonal emission receiving array along the touch screen surface edge, whether be blocked by the Infrared that detects between every a pair of infrared emission and the receiving element, judged whether that touch event occurs.This mode has a very large shortcoming can only detect exactly a touch point, if when two or more touch points are arranged simultaneously, then can't distinguish the actual touch point.
Chinese invention patent CN101493740A discloses the method that a kind of infrared touch panel is identified a plurality of true touch points, the method is at first carried out infrared scan to X-axis, Y-axis and Z-direction, scanning element touches analysis to touch signal, produces the touching position information of X-axis, Y-axis and Z axis; Controller judges whether be effective touching position information, during effective touching position information, controller is collected this information, and the data of collecting are carried out permutation and combination, produces all combined spot if producing; The controller basis
Respectively all combined spot have been judged whether qualified combined spot,
Be the angle of Z axis scanning element and X-axis scanning element, the positional information of each true touch point of drawing is transferred in the computer system.The infrared scan unit is infrared tube in this invention, the shortcoming of this method is: the luminous angle of (1) infrared tube is limited, can only increase a dip sweeping, can't carry out twice or twice above dip sweeping, therefore can't realize multi-point scanning truly; (2) infrared tube luminous energy is concentrated among a small circle, so that during dip sweeping, luminous energy is very low, effect is bad; (3) if adopt the wide-angle infrared tube, then improved the cost of touching device, and power consumption is also higher.
At present the word line infrared laser light source because of its stable output power, the technical parameters such as reliability is strong, power is evenly distributed, live width and the depth of field compare the characteristics such as ordinary light source excellence, obtained increasing application in fields such as the detection of industrial products surface quality, guiding against false of paper currency detection, expressway surface quality detections, considered that therefore the word line infrared laser light source is applied to the touch point positioning field becomes a significant problem.
Summary of the invention
One of purpose of the present invention is to overcome above-mentioned shortcoming and defect, and a kind of touch point locating device is provided, apparatus of the present invention have accurate positioning, simple for structure, applied widely, realize that cost is low and can effectively realize the advantage such as multiple point touching location.
Two of purpose of the present invention is to provide a kind of touch point localization method based on said apparatus.
One of purpose of the present invention is achieved through the following technical solutions: a kind of touch point locating device, comprise control module, infrared receiving tube array, 2 or 2 above word line infrared laser light sources, described word line infrared laser light source is installed on the diverse location of touch display screen frame, described infrared receiving tube array is installed on the frame of touch display screen, the infrared laser plane that word line infrared laser light source emission infrared laser forms covers touch display screen, and the infrared receiving tube array received on the display screen frame that is touched;
Described control module links to each other with infrared receiving tube array, word line infrared laser light source respectively, and infrared receiving tube array and word line infrared laser light source are controlled.
Purpose to better implement the present invention, the upper left corner of described touch display screen frame and the upper right corner are separately installed with the word line infrared laser light source, and the left frame of described touch display screen, lower frame and left frame are separately installed with the infrared receiving tube array.
Preferably, described touch display screen upper side frame left end, centre and right-hand member are separately installed with 1 word line infrared laser light source, and the left frame of described touch display screen, lower frame and left frame are separately installed with the infrared receiving tube array.
Preferably, the upper left corner of described touch display screen, the upper right corner and the lower right corner are separately installed with the word line infrared laser light source, and every frame of described touch display screen all is equipped with the infrared receiving tube array.
Two of purpose of the present invention is achieved through the following technical solutions: a kind of touch point localization method based on said apparatus may further comprise the steps:
(1) obtains primary data: adjust the vertical height between each word line infrared laser light source and each the infrared receiving tube array, the infrared receiving tube array received that the infrared laser that assurance word line infrared laser light source is launched can be placed on its corresponding position arrives, each infrared receiving tube is numbered and given its coordinate of the foundation own institute coordinate system of building, then control module is controlled the successively independently unlatching of each word line infrared laser light source, control module read successively unlatching the word line infrared laser light source the value of each infrared receiving tube in the corresponding infrared receiving tube array, and these values are charged in the corresponding initialization array as initialization value;
(2) position, touch point scanning: in the course of the work, control module is controlled each word line infrared laser light source and is independently opened successively, then control module read successively unlatching the word line infrared laser light source the value of each infrared receiving tube in the corresponding infrared receiving tube array, and these values and its respective value in the initialization array are compared, if the difference of the two surpasses predefined threshold value, then be judged as the touch point and blocked, recorded this infrared receiving tube and word line infrared laser light source place coordinate; After each word line infrared laser light source was all opened once, namely finish a circulation, then enter step (3);
(3) touch point location positioning: each infrared receiving tube that finds in the step (2) is linked to each other with corresponding word line infrared laser light source coordinate, in many oblique lines that obtain, get its intersection point, if the oblique line number by this intersection point equals set word line infrared laser light source number, think that then this intersection point is the coordinate of touch point.
In the described step (2), the time that each word line infrared laser light source is independently opened must be finished more than or equal to control module and be read successively the required time of infrared receiving tube output valve that covers in this word line LASER Light Source illumination plane.
In the described step (2), predefined threshold value is different according to the angle of the parameter of each infrared receiving tube, arrangement position, reception light, to reduce number percent as basis with respect to resulting each initial value signal, at least reduce 15% if the initialization value that the signal value that infrared receiving tube obtains is corresponding with it is compared, then be judged as felt pen and blocked.
Compared with prior art, the present invention has following beneficial effect:
The first, accurate positioning, simple for structure: the mode of the present invention by adopting the word line LASER Light Source to combine with infrared receiving tube, adopt merely infrared light supply to compare with prior art, effectively increased emission angle, and the present invention sends is area source, light intensity is more even, also strengthened simultaneously the light intensity that infrared receiving tube receives, greatly improve so that touch accurate positioning, and structure is more succinct, safeguards more convenient.
The second, realize the multiple point touching location: the mode that the present invention can adopt a plurality of word line LASER Light Source to combine with infrared receiving tube, because each word line LASER Light Source can be placed on diverse location, be that different word line LASER Light Source is when being lit, the source light direction that same infrared receiving tube receives is different, more can effectively distinguish a plurality of touch points, improve the resolution characteristic of touch point, real realization multiple point touching.
Three, applied widely, realize that cost is low.The present invention only needs word line LASER Light Source and infrared receiving tube, does not need to increase extra expensive parts, effectively realizes the multiple point touching location with low cost.In addition, owing to adopting the word line LASER Light Source, the light intensity of the light source that it sends is more even, has also strengthened the light intensity that infrared receiving tube receives simultaneously, therefore also is applicable to than giant-screen, and the scope of application is wider.
Description of drawings
Fig. 1 is the structural representation of device among the embodiment 1;
Fig. 2 is the process flow diagram of device work among the embodiment 1;
Fig. 3 is the structural representation of device among the embodiment 2;
Fig. 4 is the structural representation of device among the embodiment 3.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
A kind of touch point locating device, as shown in Figure 1, comprise control module 201, infrared receiving tube array 202, word line infrared laser light source 203 and word line infrared laser light source 204, control module 201 links to each other, and respectively it is controlled with infrared receiving tube array 202, word line infrared laser light source 203, word line infrared laser light source 204 respectively.
Wherein to be installed on three frames of touch display screen (be that the infrared receiving tube a+1 that installs on the left frame of touch display screen is to a+n to infrared receiving tube array 202, the infrared receiving tube b+1 that installs on the lower frame of touch display screen is to b+n, the infrared receiving tube c+1 that installs on the left frame of touch display screen is to c+n), the two ends of touch display screen upper side frame are separately installed with word line infrared laser light source 203 and word line infrared laser light source 204, word line infrared laser light source (203,204) the infrared laser plane of emission can be received by the infrared receiving tube on the corresponding sides respectively.In the present embodiment, the infrared laser plane of word line infrared laser light source 203 emission can be by the infrared receiving tube b+1 on the corresponding sides to infrared receiving tube b+n, and infrared receiving tube c+1 is received to infrared receiving tube c+n; The infrared laser plane of word line infrared laser light source 204 emission can be by infrared receiving tube a+1 on the corresponding sides to infrared receiving tube a+n, and infrared receiving tube b+1 receives to infrared receiving tube b+n.Described infrared laser plane specifically refers to the illumination plane that word line LASER Light Source emission infrared laser forms.
A kind of touch point localization method based on said apparatus may further comprise the steps:
(1) obtains primary data: adjust the vertical height between each word line infrared laser light source and each the infrared receiving tube array, guarantee that the infrared receiving tube array received that infrared laser that each word line infrared laser light source is launched can be placed on its corresponding position arrives, each infrared receiving tube is numbered and given its coordinate of the foundation own institute coordinate system of building, then control module is controlled the successively independently unlatching of each word line infrared laser light source, control module read successively unlatching the word line infrared laser light source the value of each infrared receiving tube in the corresponding infrared receiving tube array, and these values are charged in the corresponding initialization array as initialization value.In the present embodiment, control module control word line infrared laser light source 203 is opened, control module read successively in 203 corresponding infrared receiving tube arrays of word line infrared laser light source numbering from b+1 to b+n and c+1 to the value of the infrared receiving tube of c+n, and charge to these values in the initialization array of word line infrared laser light source 203 correspondences as initialization value; Then close word line infrared laser light source 203, open word line infrared laser light source 204, same method, read its in the corresponding infrared receiving tube array numbering from a+1 to a+n and b+1 to the value of the infrared receiving tube of b+n, and charge to these values in the initialization array of word line infrared laser light source 204 correspondences as initialization value;
(2) position, touch point scanning: in the course of the work, control module is controlled each word line infrared laser light source and is independently opened successively, then control module read successively unlatching the word line infrared laser light source the value of each infrared receiving tube in the corresponding infrared receiving tube array, and these values and its respective value in the initialization array are compared, if the difference of the two surpasses predefined threshold value, then be judged as the touch point and blocked, recorded this infrared receiving tube and word line infrared laser light source place coordinate; After each word line infrared laser light source was all opened once, namely finish a circulation, then enter step (3).In the present embodiment, within the time period that word line LASER Light Source 203 is lit, control module 201 reads infrared receiving tube b+1 successively to infrared receiving tube b+n, infrared receiving tube c+1 is to the output valve of infrared receiving tube c+n, and with the output valve of the infrared receiving tube that reads and the corresponding initialization value of this infrared receiving tube relatively, if exist the output valve of certain infrared receiving tube and the difference of the corresponding initialization value of this infrared receiving tube to surpass predefined threshold value, then be judged as and blocked; For example in Fig. 1, the output valve of infrared receiving tube b+17 and the difference of initial value are greater than predefined threshold value, and control module 201 records this infrared receiving tube and word line infrared laser light source 203 place coordinates so; In like manner, within the time period that word line LASER Light Source 204 is lit, control module 201 reads infrared receiving tube a+1 successively to infrared receiving tube a+n, infrared receiving tube b+1 is to the output valve of infrared receiving tube b+n, and with the output valve of the infrared receiving tube that reads and the corresponding initialization value of this infrared receiving tube relatively, if exist the output valve of certain infrared receiving tube and the corresponding initialization value 2 of this infrared receiving tube to differ above predefined threshold value, then be judged as and blocked; In Fig. 1, the output valve of infrared receiving tube b+5 and the difference of initial value are greater than predefined threshold value, and control module 201 records this infrared receiving tube and word line infrared laser light source 204 place coordinates so.
(3) touch point location positioning: each infrared receiving tube that finds in the step (2) is linked to each other with corresponding word line infrared laser light source coordinate, in many oblique lines that obtain, get its intersection point, if the oblique line number by this intersection point equals set word line infrared laser light source number, think that then this intersection point is the coordinate of touch point.In the present embodiment, obtain the oblique line L1 of the line formation of word line LASER Light Source 203 and infrared receiving tube b+17 through step (2), the oblique line L2 that the line of word line LASER Light Source 204 and infrared receiving tube b+5 forms, control module is asked for the intersecting point coordinate of this two oblique line, because two word line LASER Light Source are only arranged, the intersection point of obtaining is the coordinate of touch point A.
In the described step (2), the time that each word line infrared laser light source is independently opened must be finished more than or equal to control module and be read successively the required time of infrared receiving tube output valve that covers in this word line LASER Light Source illumination plane.
In the described step (2), predefined threshold value is different according to the angle of the parameter of each infrared receiving tube, arrangement position, reception light, to reduce number percent as basis with respect to resulting each initial value signal, at least reduce 15% if the initialization value that the signal value that infrared receiving tube obtains is corresponding with it is compared, then be judged as felt pen and blocked.
Embodiment 2
The present embodiment except following characteristics other structures with embodiment 1:
As shown in Figure 3, increased a word line LASER Light Source 205 on the basis of the installation drawing of embodiment 1, this light source places the centre of word line LASER Light Source 203 and 204, is used for realizing identification location, a plurality of touch points.Its localization method is with embodiment 1.
As shown in Figure 3, when shelter D and shelter B are arranged, through word line LASER Light Source 203, word line LASER Light Source 204 its corresponding infrared receiving tubes of scanning, can obtain oblique line L3, L4, L7, L8, by can be calculated B, C, these 4 intersection points of D, E, actually or but can't judge that shelter is wherein several and all be.The present embodiment is provided with a word line LASER Light Source 205 more, so according to lighting the corresponding infrared receiving tube information that the 205 rear scannings of word line LASER Light Source obtain, can obtain oblique line L5, L6, because the oblique line number by a B, D equals set word line infrared laser light source number, oblique line number by a C, E determines then that less than set word line infrared laser light source number last touch point is B and D point.
Embodiment 3
The present embodiment except following characteristics other structures with embodiment 1: as shown in Figure 4, in embodiment 1 installation drawing, increased a word line LASER Light Source 206, this light source places the Yi Jiaochu that is different from word line LASER Light Source 203 and 204 setting positions on the touch-screen, is used for realizing identification location, a plurality of touch point.Its localization method is with embodiment 1.
As shown in Figure 4, when shelter F and shelter H are arranged, through word line LASER Light Source 203, word line LASER Light Source 204 its corresponding infrared receiving tubes of scanning, can obtain oblique line L9, L10, L11, L12, by can be calculated F, G, these 4 intersection points of H, J, actually or but can't judge that shelter is wherein several and all be.The present embodiment is provided with a word line LASER Light Source 206 more, so according to lighting the corresponding infrared receiving tube information that the 206 rear scannings of word line LASER Light Source obtain, can obtain oblique line L13, L14, because the oblique line number by a F, H equals set word line infrared laser light source number, oblique line number by a G, J determines then that less than set word line infrared laser light source number last touch point is F and H point.
Above-described embodiment is the better embodiment of the present invention; but embodiments of the present invention are not limited by the examples; other any do not deviate from change, the modification done under Spirit Essence of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (7)
1. touch point locating device, it is characterized in that, comprise control module, infrared receiving tube array, 2 or greater than 2 word line infrared laser light sources, described word line infrared laser light source is installed on the diverse location of touch display screen frame, described infrared receiving tube array is installed on the frame of touch display screen, the infrared laser plane that word line infrared laser light source emission infrared laser forms covers touch display screen, and the infrared receiving tube array received on the display screen frame that is touched;
Described control module links to each other with infrared receiving tube array, word line infrared laser light source respectively, control module is controlled each word line infrared laser light source and is independently opened successively, control module read successively unlatching the word line infrared laser light source the value of each infrared receiving tube in the corresponding infrared receiving tube array, when having the touch point to block, judge according to the infrared receiving tube that does not receive infrared laser and word line infrared laser light source place coordinate to obtain the touch point coordinate.
2. touch point according to claim 1 locating device, it is characterized in that, the upper left corner of described touch display screen frame and the upper right corner are separately installed with the word line infrared laser light source, and the left frame of described touch display screen, lower frame and left frame are separately installed with the infrared receiving tube array.
3. touch point according to claim 1 locating device, it is characterized in that, described touch display screen upper side frame left end, centre and right-hand member are separately installed with 1 word line infrared laser light source, and the left frame of described touch display screen, lower frame and left frame are separately installed with the infrared receiving tube array.
4. touch point according to claim 1 locating device, it is characterized in that, the upper left corner of described touch display screen, the upper right corner and the lower right corner are separately installed with the word line infrared laser light source, and every frame of described touch display screen all is equipped with the infrared receiving tube array.
5. a touch point localization method is characterized in that, may further comprise the steps:
(1) obtains primary data: adjust the vertical height between each word line infrared laser light source and each the infrared receiving tube array, the infrared receiving tube array received that the infrared laser that assurance word line infrared laser light source is launched can be placed on its corresponding position arrives, each infrared receiving tube is numbered and given its coordinate of the foundation own institute coordinate system of building, then control module is controlled the successively independently unlatching of each word line infrared laser light source, control module read successively unlatching the word line infrared laser light source the value of each infrared receiving tube in the corresponding infrared receiving tube array, and these values are charged in the corresponding initialization array as initialization value;
(2) position, touch point scanning: in the course of the work, control module is controlled each word line infrared laser light source and is independently opened successively, then control module read successively unlatching the word line infrared laser light source the value of each infrared receiving tube in the corresponding infrared receiving tube array, and these values and its respective value in the initialization array are compared, if the difference of the two surpasses predefined threshold value, then be judged as the touch point and blocked, recorded this infrared receiving tube and word line infrared laser light source place coordinate; After each word line infrared laser light source was all opened once, namely finish a circulation, then enter step (3);
(3) touch point location positioning: each infrared receiving tube that finds in the step (2) is linked to each other with corresponding word line infrared laser light source coordinate, in some oblique lines that obtain, get its intersection point, if only have the device of two word line infrared laser light sources in the locating device of touch point, then can only realize location, single touch point, therefore two oblique line intersection points are the touch point; If comprise in the locating device of touch point greater than 2 word line infrared laser light sources, if the oblique line number by this intersection point equals set word line infrared laser light source number, think that then this intersection point is the coordinate of touch point, thereby realize location, a plurality of touch point.
6. touch point according to claim 5 localization method, it is characterized in that, in the described step (2), the time that each word line infrared laser light source is independently opened must be finished more than or equal to control module and be read successively the required time of infrared receiving tube output valve that covers in this word line LASER Light Source illumination plane.
7. touch point according to claim 5 localization method, it is characterized in that, in the described step (2), predefined threshold value is different according to the angle of the parameter of each infrared receiving tube, arrangement position, reception light, to reduce number percent as basis with respect to resulting each initial value signal, at least reduce 15% if the initialization value that the signal value that infrared receiving tube obtains is corresponding with it is compared, be judged as felt pen and blocked.
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| CN 201010558355 CN102004586B (en) | 2010-11-23 | 2010-11-23 | Touch point positioning device and method |
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| CN 201010558355 CN102004586B (en) | 2010-11-23 | 2010-11-23 | Touch point positioning device and method |
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| CN102004586A CN102004586A (en) | 2011-04-06 |
| CN102004586B true CN102004586B (en) | 2013-01-09 |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102819356B (en) * | 2011-06-07 | 2017-05-10 | 上海科斗电子科技有限公司 | Optical touch screen system |
| CN102346601A (en) * | 2011-07-01 | 2012-02-08 | 广东威创视讯科技股份有限公司 | Multi-touch display screen device |
| CN102419663B (en) * | 2011-08-03 | 2015-10-14 | 北京汇冠新技术股份有限公司 | A kind of infrared touch screen multi-point recognition method and system |
| CN102722294A (en) * | 2012-06-05 | 2012-10-10 | 北京理工大学 | Method using sector light sources for touch screen positioning |
| CN103064560B (en) * | 2013-01-15 | 2016-09-14 | 胡辉 | A kind of multi-point touch panel |
| CN103761012B (en) * | 2013-08-27 | 2016-07-13 | 合肥工业大学 | A kind of fast algorithm suitable in large scale infrared touch panel |
| CN103885647B (en) * | 2014-03-17 | 2017-02-15 | 深圳市创凯智能股份有限公司 | Self-adapting restoring method for touch screen device and touch screen device |
| CN103885648B (en) * | 2014-03-25 | 2017-04-12 | 锐达互动科技股份有限公司 | True two-point touch detecting method for side projection double-lens touch screen |
| CN104298394B (en) * | 2014-08-28 | 2017-12-22 | 合肥鑫晟光电科技有限公司 | A kind of touch-screen and its localization method, touch display unit |
| CN106383619A (en) * | 2016-10-19 | 2017-02-08 | 南京仁光电子科技有限公司 | Large-screen touch interaction system |
| CN110083272B (en) * | 2019-05-06 | 2023-07-07 | 深圳市康冠商用科技有限公司 | Touch positioning method and related device of infrared touch frame |
| CN110989853A (en) * | 2019-10-23 | 2020-04-10 | 南方科技大学 | Laser virtual interaction system and interaction method based on liquid crystal photoelectric effect |
| CN112462983A (en) * | 2020-12-17 | 2021-03-09 | 中国农业银行股份有限公司 | Non-contact input equipment and method for determining character input value |
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| CN101300620A (en) * | 2005-09-08 | 2008-11-05 | 能量2B公司 | Displays and information input devices |
| CN101477427A (en) * | 2008-12-17 | 2009-07-08 | 卫明 | Contact or non-contact type infrared laser multi-point touch control apparatus |
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| US6429857B1 (en) * | 1999-12-02 | 2002-08-06 | Elo Touchsystems, Inc. | Apparatus and method to improve resolution of infrared touch systems |
| CN101727245B (en) * | 2008-10-15 | 2012-11-21 | 北京京东方光电科技有限公司 | Multi-touch positioning method and multi-touch screen |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101300620A (en) * | 2005-09-08 | 2008-11-05 | 能量2B公司 | Displays and information input devices |
| CN101477427A (en) * | 2008-12-17 | 2009-07-08 | 卫明 | Contact or non-contact type infrared laser multi-point touch control apparatus |
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Address after: 510670 Guangdong city of Guangzhou province Kezhu Guangzhou high tech Industrial Development Zone, Road No. 233 Patentee after: Wei Chong group Limited by Share Ltd Address before: 510663 Guangzhou province high tech Industrial Development Zone, Guangdong, Cai road, No. 6, No. Patentee before: Guangdong Weichuangshixun Science and Technology Co., Ltd. |
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