CN101520707A - Infrared ray and camera combined multipoint positioning touch device and positioning method - Google Patents
Infrared ray and camera combined multipoint positioning touch device and positioning method Download PDFInfo
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- CN101520707A CN101520707A CN200910038494A CN200910038494A CN101520707A CN 101520707 A CN101520707 A CN 101520707A CN 200910038494 A CN200910038494 A CN 200910038494A CN 200910038494 A CN200910038494 A CN 200910038494A CN 101520707 A CN101520707 A CN 101520707A
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Abstract
The invention discloses an infrared ray and camera combined multipoint positioning touch device and a positioning method. The device combines infrared scanning technology of an infrared scanning module and photographic technology of a camera to initially acquire the transverse and longitudinal coordinate values of a touched object through the infrared scanning technology and to extract coordinate angle information according to the positions of a bright fringe formed by the reflected light of the touched screen in an absorption-band-background picture shot by the camera to determine the actual coordinate of a touch point. The device is simple in structure, quick in response, wide in adaptability and high in reliability.
Description
[technical field]
The present invention relates to the display screen field, particularly a kind of touch panel device and localization method thereof.
[background technology]
The electronic touch technology provides great convenience to man-machine interaction mode, technically also provides multiple solution, and Performance And Reliability is also constantly perfect.Common in the market electronic touch technology has dual mode: a kind of is passive mode, utilizes resistance, electric capacity, infrared scan technology, and characteristics are need can not realize touching the location through the electronic pen of special facture; Another is an active mode, and as electromagnetic location, ultrasonic locating, this mode need could realize touching the location through the electronic pen of special facture, in case pen is lost or damaged, whole positioning system just cannot be worked.Along with the continuous development of electronic touch technology, the infrared scan location technology has its special advantages, for example compares with resistance, electric capacity location, can accomplish light transmission completely, wearing quality; Compare with electromagnetic location, ultrasonic locating technology, infrared location technology need not to use special electronic pen, and is easy to use; In addition, infrared location technology can also be applied in the large scale touch-screen very easily, can be applicable in rear-projection TV, front projection machine or the PDP/LCD display device.
Though infrared location technology has many advantages, existing infrared location technology, normally the infrared net that intersects in length and breadth that forms by infrared transmitting tube and infrared receiving tube realizes touching the location.It can only realize the single-point location, and with a finger manipulation touch-screen, it has just replaced input equipments such as traditional mouse, keyboard in essence, fails to realize multipoint positioning accurately, and a plurality of fingers are operating host or even many people application of operating host simultaneously simultaneously.
[summary of the invention]
The invention provides a kind of simple in structure, the infrared touch screen device and the localization method thereof of the support multiple point touching that response speed is fast, reliability is high.
For achieving the above object, the present invention has adopted following technical scheme:
The multipoint positioning touch device that a kind of infrared ray combines with camera, it comprises infrared scan module, bands absorption, camera module and main control module.
Described infrared scan module comprises infrared transmission module and infrared receiving module, and wherein the pairing of infrared transmission module and receiver module is used, and forms the raster scanning net on horizontal vertical two directions, i.e. writing plane, and writing plane is parallel to display screen.
Described bands absorption is placed on the infrared receiving module top, and its absorption comprises the infrared light of infrared transmission module emission, and other visible lights.
Described camera module can be placed on any one place or corner, as long as this camera head can photograph whole bands absorption, generally be placed on the corner of touch-screen, the optical axis center line parallel of camera lens is in writing plane or in writing plane, can photograph whole viewing area, especially photograph whole bands absorption, be used to detect positional information, color and the size of all touch objects in writing plane.
Described main control module, the operation of control total system, collect the touch data that infrared receiving module is gathered, and the touch objects data of camera module collection, last COMPREHENSIVE CALCULATING goes out actual touch article coordinate, color and size, and send to main process equipment, and perhaps all or part data of gathering are sent to main process equipment, calculate actual touch coordinate, color and size by main process equipment.
Described touch objects, its color can be other colors except that black, can coat high reflecting material on touch objects, or for camera head increases outside secondary light source, effectively strengthen reflected light.
A kind of localization method of touch panel device comprises step:
S101: start infrared scan, under the situation that has touch objects to exist, write down the positional information of the infrared receiving tube that is blocked by described touch objects;
S102: take a width of cloth picture with the position that can photograph whole bands absorption, under the situation that has touch objects to exist,, analyze the angle information of described touch objects according to the bright fringes position that touch objects reflected light in the described picture forms;
S103: according to the described positional information of step S101, draw all possible touch point position combinations, and, analyzing the data message of actual touch thing in conjunction with the angle information among the described step S102, described data message comprises the coordinate information of the touch point of actual touch thing;
S104: repeating step S101 to S103.
Wherein, described step S101.S102 can exchange sequence or is carried out synchronously.
Above-mentioned steps S101 judges whether to exist the mode of touch objects to be:
Whether detect signal according to infrared receiving tube and judge whether to have the shield thing, if do not detect any signal, then there is shelter in decidable between this is to the infrared emission receiving tube, and the record current position information;
Or, when using first, carry out infrared scan earlier one time, the detected signal intensity of infrared receiving tube under the record no touch thing state.When starting infrared scan once more, according to the received signal of infrared receiving tube, calculate the changing value of this signal, if changing value is greater than or equal to predetermined value with respect to the signal strength values of described record, then judge to have the shield touch objects, and the record current position information.
The present invention is compared with the prior art has following beneficial effect:
Touch panel device of the present invention, it has utilized the infrared scan technology of infrared scan module and the image production technology of camera head simultaneously, and touch objects is analyzed in conjunction with these two kinds of technology, both supported single-point touches, also support multiple point touching, can many people operate simultaneously, simple in structure, response speed is fast, applicability is wide and reliability is high.
The present invention uses the localization method of above-mentioned touch panel device, and it adopts infrared scan is main, and shooting collection is auxilliary, and response speed is fast, and reliable and stable; Support single-point touches and multiple point touching simultaneously, and owing to can gather the color and the size information of touch objects, can follow the tracks of each touch point respectively, thereby can make different responses, make to use to become more flexible, lively the same touch action that different touch objects is made; Applicability is wide, can be applicable to systems such as flat panel TV, preceding throwing, rear-projection, is specially adapted to large screen display system.
[description of drawings]
Fig. 1 is the structural representation of the touch panel device of the embodiment of the invention;
Fig. 2 is the touch panel device localization method schematic flow sheet of the embodiment of the invention;
Fig. 3 is the scanning theory synoptic diagram of embodiment of the invention infrared scan module;
Fig. 4 is an embodiment of the invention infrared scan module scanning multiple point touching synoptic diagram;
Fig. 5 is the multiple point touching synoptic diagram that embodiment of the invention infrared scan module is gathered in conjunction with camera head;
Fig. 6 is an embodiment of the invention camera head image pickup method synoptic diagram.
[embodiment]
Referring to shown in Figure 1, be the structural representation of the touch panel device of the embodiment of the invention, as shown in the figure, the 101st, infrared transmission module longitudinally, the 102nd, horizontal infrared transmission module, the 103rd, infrared receiving module longitudinally, the 104th, horizontal infrared receiving module, 101,102,103 become the infrared scan module among the present invention, the 105th, camera head with 104 mutual group, the 106th, bands absorption 1,107th, bands absorption 2.Wherein, 108, the 109th, the pairing infrared tube on a pair of longitudinal direction, 110,111st, a pair of pairing infrared tube in a lateral direction, 112, the 113rd, the infrared scan line of vertical and horizontal, wherein, all vertical infrared scan lines are near parallel, all horizontal scan lines have been formed the infrared scan net near parallel by the infrared scan line of horizontal, vertical both direction.
Wherein, camera head can be placed on any one place or corner, only needs this camera head can photograph whole bands absorption, and present embodiment preferably is placed on camera head the intersection of emitted transverse module and vertical transmitter module.In addition, the optical axis center line of the camera lens of camera head preferably is parallel to the plane that described infrared scan net constitutes, and perhaps this optical axis center line can be located immediately in this plane.
Wherein, the touch objects color that is used to touch is other colors except that black, avoids it to absorb light, can't be created in and form the required reflected light of bright fringes in the pictures taken.
Referring to shown in Figure 2, the touch panel device localization method schematic flow sheet for the embodiment of the invention as shown in the figure, may further comprise the steps:
S101: start infrared scan, judge whether to exist touch objects,, write down the positional information of the infrared receiving tube that is blocked by described touch objects if having;
S102: take a width of cloth picture with the position that can photograph whole bands absorption, whether have touch objects,,, analyze the angle information of described touch objects according to the bright fringes position that touch objects reflected light in the described picture forms if having according to picture analyzing;
S103: according to the described positional information of step S101, draw all possible touch point position combinations, and, analyzing the data message of actual touch thing in conjunction with the angle information among the described step S102, described data message comprises the coordinate information of the touch point of actual touch thing;
S104: repeating step S101 to S103.
Wherein, described step S101.S102 can exchange sequence or is carried out synchronously.
Above-mentioned steps S101 judges whether to exist the mode of touch objects to be:
Whether detect signal according to infrared receiving tube and judge whether to have the shield thing, if do not detect any signal, then there is shelter in decidable between this is to the infrared emission receiving tube, and writes down the positional information of this infrared receiving tube;
Or, when using first, carry out infrared scan earlier one time, the detected signal intensity of infrared receiving tube under the record no touch thing state.When starting infrared scan once more, according to the received signal of infrared receiving tube, calculate the changing value of this signal, if changing value is greater than or equal to predetermined value with respect to the signal strength values of described record, then judge to have the shield touch objects, and write down the positional information of this infrared receiving tube.
Referring to shown in Figure 3, in infrared transmission module and the infrared receiving module, each all is a synchronous working to the infrared emission receiving tube, and an infrared tube is used for emission, an infrared tube is used for receiving, in order to detect on this a pair of infrared emission receiving tube corresponding scanning line whether shelter being arranged.In a scan period, all power valves are lighted once, and all infrared transmitting tubes can successively be lighted, and also can light simultaneously by subregion, according to the difference of application need and different.In a scan period, all infrared transmitting tubes are lighted a period of time, and all receiving tubes detect a signal to be changed.When this touch panel device powers on, to system initialization, start single pass, the detected signal of infrared receiving tube of this moment is all noted as the signal criterion value, as basis for estimation afterwards.When the device operate as normal, the detected signal of all infrared receiving tubes approaches signal criterion value separately or equates.301 is touch points, this moment is in infrared scan longitudinally, the infrared ray of 302 infrared tubes emission will be blocked, and 303 receiving tubes detected signal this moment and signal criterion value differ bigger, the receiving tube numbering that master controller changes tracer signal, and numbering can be converted into virtual coordinate, same principle, laterally in the infrared scan, the infrared ray of 304 infrared tubes emission will be blocked, and 305 infrared receiving tubes also will detect signal to be changed.Master controller calculates virtual coordinate, just can unique definite touch point by the horizontal vertical detected coordinate figure of two directions, be mapped to actual touch coordinate by virtual coordinates again.
When having only a touch point, horizontal and vertical infrared scan line is blocked, and receiver module detects signal and produced variation, and so just unique intersection point of having determined two sweep traces is exactly actual touch point; When N (N is more than or equal to 2) touch point, minimumly on horizontal vertical two directions can both detect N and block a little, multipotency detects N2 touch point, and only can't judge actual have what touch points and each touch point position coordinate, but can analyze all possible reasonable touch point combination according to blocking point data.
Referring to as shown in Figure 4,401,404 be respectively two touch points, according to the infrared module scanning theory, receiver module will detect infrared signal at infrared receiving tube 405,406,407,408 places to be changed, can judge that thus possible touch point is 401,402,403,404 at most, but can't determine actual what touch points that have, possible combination has following several:
1、401，404
2、402，403
3、401，403，404
4、401，402，404
5、401、402、403
6、402、403、404
7、401、402、403、404
Only the mode with infrared scan is can't detect actual touch to count.
Referring to as shown in Figure 5, be the multiple point touching synoptic diagram that embodiment of the invention infrared scan module is gathered in conjunction with camera head.In the same scan period, camera head and infrared scan module can be that to synchronous working also can be to work sequentially, and camera head is found a view from the direction that is parallel to the infrared scan net, gets the height that comprises whole bands absorption and gets final product, and data volume is very little.The position that camera module is placed must can photograph whole bands absorption, and the 505th, the picture that camera head is taken.When touch objects touched, the light of the touch objects reflection head module of being made a video recording was captured, formed a width of cloth with bands absorption look as a setting, contained the bright fringes 501 of touch objects reflection, the picture of bright fringes 502.The background colour picture of taking during with this pictures taken and no touch thing is analyzed, and according to bright fringes 501, bright fringes 502 position in bands absorption that touch objects reflected light in the described picture forms, extracts the angular position information of touch objects.
Wherein, the calculating of angle position can be as the criterion by the camera lens optical axis center line, with the angle calculation that departs from, also can be with other any be that the line at center is used as calculating benchmark with the camera lens, and these calculating means of choosing finally all can be converted among the figure 503,504 angle information.
As shown in Figure 5,506.507.508.509 be by the resulting possible touch objects of infrared scan, 506, the 509th, the touch objects that photographs, extract deviation angle, color and the size of touch objects from picture, again in conjunction with the result of infrared scan gained, can analysis-by-synthesis drawing actual touch objects has 506,509, got rid of other possibility.
For the convenient actual size that calculates touch objects, be that the center is divided into the plurality of sector district with screen with the camera lens, the touch objects size of taking same size in a certain fan section also equates.Owing to the difference of camera lens, to set up the question blank or the computing formula of natural scale and distance before use.After analyzing the coordinate position of touch objects, can calculate the distance that each touch objects departs from camera lens, again by tabling look-up or calculating the actual size of touch objects.
As Fig. 6, the 601st, the infrared scan network plane that the infrared scan module of horizontal vertical two directions is formed, the 602nd, the display device plane, the 603rd, the wide shaft centre line of cam lens, it is parallel to the infrared scan network plane or in this plane, 604, the 605th, the viewfinder range of camera module, need to satisfy and photograph whole display device, the 606th, the height of pictures taken, can suitably adjust as required, the 607th, touch objects, the 608th, the photo that camera module photographs, the 609th, the bright fringes that the touch objects reflected light forms in pictures taken is tabled look-up or is calculated the angle information of touch objects from the distance of photo high order end or low order end according to touch objects.This computation process can be to be finished by camera module, and camera module will calculate the gained result and send to the main control module, also can be that camera module sends to the main control module with the picture of clapping, and carries out calculation process by the main control module.
The touch data that the main control module is gathered according to infrared receiving module, and the touch objects data of being gathered in this picture, COMPREHENSIVE CALCULATING goes out position coordinates, color and the size of actual touch objects, and send to main process equipment, or the main control module sends to main process equipment with the above-mentioned touch data and the touch objects data of being gathered, and calculated coordinate, color and the size of actual touch objects by main process equipment.
According to information such as the color of touch objects and sizes, main process equipment can carry out independent tracing management to each operator's user mode, such as: the line that the thick blue pen that has no chance draws is blue thick line, the line that comes out with the thin red stroke that has no chance is a The Thin Red Line, this makes and seem more lively, directly perceived in interactively multimedia application, and can also be applied to other each occasions.
In addition, because in the application of touch-screen, the requirement of real-time is than higher, the time shutter of cam device is shorter, in order to reach better shooting effect, improves the sharpness of camera head, can adopt following several scheme:
1, for no reason at all coating high reflecting material on the pen (being equivalent to touch objects), promptly using the touch objects of band high reflecting material or on touch objects, use the accessory of high reflecting material, the pen cap of hollow for example, thereby the pen cap can be enclosed within easily that pen is gone up or finger on;
2, for camera head increases outside secondary light source, help strengthening reflected light.
Above-described embodiment of the present invention does not constitute the qualification to protection domain of the present invention.Any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection domain of the present invention.
Claims (10)
1, the multipoint positioning touch device that combines with camera of a kind of infrared ray, it comprises infrared transmission module and infrared receiving module that pairing is used, it is characterized in that, it further comprises bands absorption, camera module and main control module, this bands absorption is arranged on the infrared receiving module top, and camera module is arranged on the position that can photograph whole bands absorption.
2, the multipoint positioning touch device that combines with camera of infrared ray as claimed in claim 1 is characterized in that this infrared transmission module and infrared receiving module form the raster scanning net that is parallel to display screen on horizontal vertical both direction.
3, the multipoint positioning touch device that combines with camera of infrared ray as claimed in claim 2 is characterized in that, this camera module is placed on the emitted transverse module and the vertical intersection of transmitter module.
4, the multipoint positioning touch device that combines with camera as claim 2 or 3 described infrared rays, it is characterized in that, the camera lens optical axis center line of this camera module is parallel to this raster scanning net, or this optical axis center line is positioned at this plane, raster scanning net place.
5, the multipoint positioning touch device that combines with camera of infrared ray as claimed in claim 1 is characterized in that, the touch objects color of this device adopts any other colors except that black.
6, the multipoint positioning touch device that combines with camera of infrared ray as claimed in claim 5 is characterized in that this touch objects scribbles high reflecting material.
7, the multipoint positioning touch device that combines with camera as claim 1 or 5 described infrared rays is characterized in that it further comprises the outside secondary light source of camera head.
8, a kind of touch-screen localization method that adopts the multipoint positioning touch device that combines with camera as the described infrared ray of claim 1～7, the method comprising the steps of S101: having touch objects to exist under the situation, the be touched positional information of the infrared receiving tube that thing blocks of record; It is characterized in that it also comprises
Step S102: take the image of whole bands absorption by camera module, the angle information at described touch objects place is analyzed; Step S103: the data message that analyzes the actual touch thing according to step S101 and step S102; Step S104: repeating step S101 is to step S103.
9, the touch-screen localization method of support multipoint positioning as claimed in claim 8 is characterized in that, the commutative order of step S101, step S102 or carry out synchronously.
10, the touch-screen localization method of support multipoint positioning as claimed in claim 8, it is characterized in that, it further comprises initialization step: carry out one time infrared scan when using first earlier, the detected signal intensity of infrared receiving tube under the record no touch thing state is reference point as a comparison.
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| CN200910038494A CN101520707A (en) | 2009-04-08 | 2009-04-08 | Infrared ray and camera combined multipoint positioning touch device and positioning method |
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| CN200910038494A CN101520707A (en) | 2009-04-08 | 2009-04-08 | Infrared ray and camera combined multipoint positioning touch device and positioning method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102033706A (en) * | 2010-12-14 | 2011-04-27 | 广东威创视讯科技股份有限公司 | Automatic menu regulation method and system |
| CN102262484A (en) * | 2010-05-26 | 2011-11-30 | 北京汇冠新技术股份有限公司 | Touch screen, touch system and display device |
| CN102346602A (en) * | 2011-07-01 | 2012-02-08 | 广东威创视讯科技股份有限公司 | Multi-point touch display screen device |
| CN102375617A (en) * | 2010-08-04 | 2012-03-14 | 精工爱普生株式会社 | Optical position detection apparatus and appliance having position detection function |
| CN102053757B (en) * | 2009-11-05 | 2012-12-19 | 上海精研电子科技有限公司 | Infrared touch screen device and multipoint positioning method thereof |
| CN103164085A (en) * | 2011-12-16 | 2013-06-19 | 冠捷投资有限公司 | touch device |
| CN103885641A (en) * | 2012-12-20 | 2014-06-25 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| CN104159016A (en) * | 2013-05-13 | 2014-11-19 | 浙江大华技术股份有限公司 | Cradle head control system, method and device |
| CN107770466A (en) * | 2017-11-06 | 2018-03-06 | 青岛海信激光显示股份有限公司 | a laser tv |
| CN116974400A (en) * | 2023-09-14 | 2023-10-31 | 深圳市磐鼎科技有限公司 | Screen touch recognition method, device, equipment and storage medium |
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2009
- 2009-04-08 CN CN200910038494A patent/CN101520707A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102053757B (en) * | 2009-11-05 | 2012-12-19 | 上海精研电子科技有限公司 | Infrared touch screen device and multipoint positioning method thereof |
| CN102262484A (en) * | 2010-05-26 | 2011-11-30 | 北京汇冠新技术股份有限公司 | Touch screen, touch system and display device |
| CN102375617A (en) * | 2010-08-04 | 2012-03-14 | 精工爱普生株式会社 | Optical position detection apparatus and appliance having position detection function |
| CN102033706A (en) * | 2010-12-14 | 2011-04-27 | 广东威创视讯科技股份有限公司 | Automatic menu regulation method and system |
| CN102346602A (en) * | 2011-07-01 | 2012-02-08 | 广东威创视讯科技股份有限公司 | Multi-point touch display screen device |
| CN103164085A (en) * | 2011-12-16 | 2013-06-19 | 冠捷投资有限公司 | touch device |
| CN103885641A (en) * | 2012-12-20 | 2014-06-25 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| CN103885641B (en) * | 2012-12-20 | 2017-07-25 | 联想(北京)有限公司 | The method and electronic equipment of information processing |
| CN104159016A (en) * | 2013-05-13 | 2014-11-19 | 浙江大华技术股份有限公司 | Cradle head control system, method and device |
| CN104159016B (en) * | 2013-05-13 | 2017-10-27 | 浙江大华技术股份有限公司 | Cloud platform control system, method and device |
| CN107770466A (en) * | 2017-11-06 | 2018-03-06 | 青岛海信激光显示股份有限公司 | a laser tv |
| CN107770466B (en) * | 2017-11-06 | 2019-12-17 | 青岛海信激光显示股份有限公司 | a laser tv |
| CN116974400A (en) * | 2023-09-14 | 2023-10-31 | 深圳市磐鼎科技有限公司 | Screen touch recognition method, device, equipment and storage medium |
| CN116974400B (en) * | 2023-09-14 | 2024-01-16 | 深圳市磐鼎科技有限公司 | Screen touch recognition method, device, equipment and storage medium |
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Application publication date: 20090902 |